CN116419280A

CN116419280A - Communication method, terminal device, network device and communication system

Info

Publication number: CN116419280A
Application number: CN202210074534.3A
Authority: CN
Inventors: 何泓利; 李雪茹
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2021-12-29
Filing date: 2022-01-21
Publication date: 2023-07-11

Abstract

The embodiment of the application provides a communication method. The method comprises the following steps: the terminal equipment receives first configuration information from the network equipment, wherein the first configuration information is used for indicating the terminal equipment to report channel state information, and the first configuration information comprises one or more identifiers of first reference signals. The terminal device sends first information to the network device, where the first information includes channel state information of at least one second reference signal, where the at least one second reference signal is part or all of the one or more first reference signals, and the first information includes first indication information, where the first indication information is used to indicate whether the terminal device stores a first quasi co-located QCL parameter of the at least one second reference signal. The terminal equipment reports whether the terminal equipment stores the QCL parameters of certain reference signals or not, so that the network equipment can know whether the terminal equipment stores the QCL parameters of certain reference signals or not.

Description

Communication method, terminal device, network device and communication system

Technical Field

The embodiment of the application relates to the field of communication, and more particularly, to a communication method, a terminal device, a network device and a communication system.

Background

Quasi co-location (QCL) in the New Radio (NR) is defined as: if the channel characteristics characterized by one antenna port over one symbol can be inferred from the channel characterized by the other antenna port over one symbol, then the two channels QCL, NR can be considered to define four QCL parameter types:

- 'typeA': { Doppler shift, doppler spread, average delay, delay spread }

- 'typeB': doppler shift, doppler spread }

"typeC" ({ Doppler shift, average delay })

- 'typeD': spatial reception parameter }

Wherein QCL parameters of typeA, typeB, and typeC can be used for time-frequency synchronization and channel estimation. Acquiring the doppler shift can be understood as completing frequency domain synchronization; obtaining the average time delay can be understood as completing time domain synchronization; acquiring doppler spread and delay spread can be used for channel estimation; the QCL parameter of typeD indicates that the spatial reception parameters employed by the two antenna ports are the same or similar, and is used to assist the receiving device in determining its own reception beam.

The QCL parameters are beneficial to improving the communication performance, so how to make the terminal device and the network device know the QCL parameters of certain reference signals is a problem to be solved.

Disclosure of Invention

The embodiment of the application provides a communication method, which enables network equipment to know whether terminal equipment stores QCL parameters of certain reference signals or not by reporting whether the terminal equipment stores the QCL parameters of certain reference signals or not by the terminal equipment.

In a first aspect, a communication method is provided, which may be performed by a terminal device, or may also be performed by a component (e.g., a chip or a circuit) of the terminal device, which is not limited, and for convenience of description, an example of the method performed by the terminal device will be described below.

The communication method comprises the following steps: the method comprises the steps that a terminal device receives first configuration information from a network device, wherein the first configuration information is used for indicating the terminal device to report channel state information, and the first configuration information comprises one or more identifiers of first reference signals; the terminal device sends first information to the network device, wherein the first information comprises channel state information of at least one second reference signal, and the at least one second reference signal is part or all of the one or more first reference signals; the first information includes first indication information, where the first indication information is used to indicate whether the terminal device stores a first quasi co-sited QCL parameter of the at least one second reference signal.

Based on the technical scheme, when the terminal equipment reports the channel state information, whether the first QCL parameters of certain reference signals are included or not is synchronously reported, so that the network equipment can acquire the first QCL parameter conditions of the reference signals stored by the terminal equipment, and whether the first QCL parameters of certain reference signals are stored by the terminal equipment or not is clear, and the subsequent relevant configuration based on the first QCL parameters is facilitated. For example, in the case where the effective time of activating a new TCI-state is determined based on the first QCL parameter information, the efficiency of activating the new TCI-state can be improved.

With reference to the first aspect, in certain implementations of the first aspect, the method further includes: the terminal device receives the one or more first reference signals from the network device.

With reference to the first aspect, in certain implementation manners of the first aspect, the first indication information indicates whether the terminal device stores a first QCL parameter of the at least one second reference signal, including: the first indication information indicates whether the terminal device stores the second QCL parameters of at least one third reference signal in the at least one second reference signal, and the first information further includes an identification of the at least one third reference signal if the first indication information indicates that the terminal device stores the second QCL parameters of the at least one third reference signal in the at least one second reference signal.

Based on the technical scheme, the terminal equipment indicates the second QCL parameters of which reference signals are stored in the terminal equipment, and the reference signals of the second QCL parameters are stored in the terminal equipment, so that the subsequent relevant configuration based on the second QCL parameters is facilitated.

With reference to the first aspect, in certain implementations of the first aspect, any one of the at least one third reference signal satisfies the QCL relationship with the synchronization signal block SSB or the tracking reference signal TRS.

Based on the above technical solution, the third reference signal of the terminal device stored with the second QCL parameter may satisfy the QCL relation with the SSB, or alternatively, the third reference signal of the terminal device stored with the second QCL parameter may satisfy the QCL relation with the TRS, which indicates that the second QCL parameter of the third reference signal may be obtained by measuring the SSB or the TRS having the QCL relation with the third reference signal, and in general, the second QCL parameter measured by the SSB or the TRS is more accurate.

With reference to the first aspect, in certain implementations of the first aspect, the method further includes: the terminal equipment receives second indication information from the network equipment, wherein the second indication information is used for indicating an activated transmission configuration indication state TCI-state; when the fourth reference signal corresponding to the TCI-state meets the first condition, the effective moment of the TCI-state is the first moment; when the fourth reference signal corresponding to the TCI-state does not meet the first condition, the effective moment of the TCI-state is the second moment; the first condition includes that the fourth reference signal is one of the at least one third reference signal or that the fourth reference signal and one of the at least one third reference signal satisfy a QCL relationship, wherein the first time instant is earlier than the second time instant.

With reference to the first aspect, in some implementations of the first aspect, the first time is a time when a first duration passes from a time when the second indication information is received, and the second time is a time when a second duration passes from a time when the second indication information is received, where the second duration is greater than or equal to a sum of the first duration, a duration of waiting for the synchronization signal block SSB or the tracking reference signal TRS, and a duration of processing the SSB or TRS.

Based on the technical scheme, the second QCL parameter information is reported by the terminal equipment, so that the network equipment can determine whether the terminal has the second QCL parameter information of the antenna port corresponding to the third reference signal, and the network equipment and the terminal equipment have consistent knowledge about whether the new TCI-state can meet the first condition, and can determine whether the time of activating the new TCI-state is the first time or the second time according to whether the first condition is met. When the first condition is not satisfied, the terminal device does not have the second QCL parameter corresponding to the TCI-state, so that an additional SSB or TRS is required to be received after the second indication information to perform measurement and processing on the second QCL parameter, where the additional SSB or TRS has a QCL relationship with the reference signal associated with the TCI-state, that is, the new TCI-state needs to be used after waiting for a second period of time; when the second condition is satisfied, the terminal device has obtained the corresponding second QCL parameter, and the base station can also determine that the terminal device has obtained the corresponding second QCL parameter, so that the new TCI-state can be used only after the corresponding processing of the second indication information is completed, that is, only the first duration needs to be waited. Under the condition that the technical scheme is not adopted, the network equipment can not determine whether the terminal equipment has the second QCL parameter information of the antenna port corresponding to the third reference signal, so that the new TCI-state can only be used after the second moment, and in the scheme, the network equipment and the terminal equipment have the opportunity to use the new TCI-state after the first moment, namely, the QCL parameter is utilized for controlling and transmitting the data channel, so that the efficiency of activating the new TCI-state is improved.

With reference to the first aspect, in certain implementations of the first aspect, the fourth reference signal and one of the at least one third reference signal satisfy a QCL relationship, including: the fourth reference signal and one of the at least one third reference signal satisfy an a-type QCL relationship, wherein the a-type QCL relationship includes that a channel experienced by an antenna port transmitting the fourth reference signal and a channel experienced by an antenna port transmitting the third reference signal share a common relation: together: doppler shift, doppler spread, average delay and delay spread.

Based on the above technical solution, the limitation of the first condition on the QCL relationship is stricter, so that the terminal device can use the TCI-state at the first moment when the terminal device obtains the a-type QCL parameter of the fourth reference signal, and since the a-type QCL parameter contains a channel large-scale characteristic more than the C-type QCL parameter, when the terminal device has the a-type QCL parameter, the channel estimation can be performed more accurately, and the reliability of the terminal device for transmitting data using the new TCI-state is improved.

With reference to the first aspect, in some implementations of the first aspect, a duration of a third time and a fourth time interval is less than or equal to a first threshold, where the third time is a time when the terminal device receives the third indication information, and the fourth time is a time when the terminal device sends the first information.

Based on the technical scheme, the time interval between the terminal equipment receiving the activation instruction and the first information reporting cannot be too large, so that timeliness is ensured.

With reference to the first aspect, in certain implementations of the first aspect, the method further includes: the terminal device receives third indication information from the network device, where the third indication information is used to instruct the terminal device to report the type of the second QCL parameter, and the first information further includes fourth indication information, where the fourth indication information is used to instruct the terminal device to obtain the type of the second QCL parameter of the at least one third reference signal.

With reference to the first aspect, in certain implementations of the first aspect, the type of the second QCL parameter reported includes a type a or a type C.

Based on the above technical solution, the network device instructs the terminal device to report the obtained second QCL parameter type, and may perform different configurations according to the second QCL parameter type obtained by the terminal, for example, when the second QCL parameter type obtained by the terminal has only a C type and no a type, the accuracy of the terminal to channel estimation may be limited, and the network device may use a low-rate modem mode when transmitting to the terminal device, so as to improve transmission reliability.

In a second aspect, a communication method is provided, which may be performed by a network device, or may also be performed by a component (e.g., a chip or a circuit) of the network device, which is not limited, and for convenience of description, will be described below with reference to the embodiment performed by the network device.

The communication method comprises the following steps: the network equipment sends first configuration information to the terminal equipment, wherein the first configuration information is used for indicating the terminal equipment to report channel state information, and the first configuration information comprises one or more identifiers of first reference signals; the network device receives first information from the terminal device, the first information including channel state information of at least one second reference signal, the at least one second reference signal being part or all of the one or more first reference signals; the first information includes first indication information, where the first indication information is used to indicate whether the terminal device stores a first quasi co-sited QCL parameter of the at least one second reference signal.

With reference to the second aspect, in certain implementations of the second aspect, the method further includes: the network device transmits the one or more first reference signals to the terminal device.

With reference to the second aspect, in some implementations of the second aspect, the first indication information indicates whether the terminal device stores the first QCL parameter of the at least one second reference signal, including: the first indication information indicates whether the terminal device stores the second QCL parameters of at least one third reference signal in the at least one second reference signal, and the first information further includes an identification of the at least one third reference signal if the first indication information indicates that the terminal device stores the second QCL parameters of the at least one third reference signal in the at least one second reference signal.

With reference to the second aspect, in certain implementations of the second aspect, any one of the at least one third reference signal satisfies the QCL relationship with the synchronization signal block SSB or the tracking reference signal TRS.

With reference to the second aspect, in certain implementations of the second aspect, the method further includes: the network equipment sends second indication information to the terminal equipment, wherein the second indication information is used for indicating an activated transmission configuration indication state TCI-state; when the fourth reference signal corresponding to the TCI-state meets the first condition, the effective moment of the TCI-state is the first moment; when the fourth reference signal corresponding to the TCI-state does not meet the first condition, the effective moment of the TCI-state is the second moment; the first condition includes that the fourth reference signal is one of the at least one third reference signal or that the fourth reference signal and one of the at least one third reference signal satisfy a QCL relationship, wherein the first time instant is earlier than the second time instant.

With reference to the second aspect, in some implementations of the second aspect, the first time is a time when a first duration passes from a time when the second indication information is received, and the second time is a time when a second duration passes from a time when the second indication information is received, where the second duration is greater than or equal to a sum of the first duration, a duration of waiting for the synchronization signal block SSB or the tracking reference signal TRS, and a duration of processing the SSB or the TRS.

With reference to the second aspect, in certain implementations of the second aspect, the fourth reference signal and a third reference signal of the at least one third reference signal satisfy a QCL relationship, including: the fourth reference signal and one of the at least one third reference signal satisfy an a-type QCL relationship, wherein the a-type QCL relationship includes that a channel experienced by an antenna port transmitting the fourth reference signal and a channel experienced by an antenna port transmitting the third reference signal share a common relation: doppler shift, doppler spread, average delay and delay spread.

With reference to the second aspect, in some implementations of the second aspect, a duration of a third time and a fourth time interval is less than or equal to the first threshold, where the third time is a time when the terminal device receives the third indication information, and the fourth time is a time when the terminal device sends the first information.

With reference to the second aspect, in certain implementations of the second aspect, the method further includes: the network device sends third indication information to the terminal device, where the third indication information is used to instruct the terminal device to report the type of the second QCL parameter, and the first information further includes fourth indication information, where the fourth indication information is used to instruct the type of the second QCL parameter of at least one third reference signal acquired by the terminal device.

With reference to the second aspect, in some implementations of the second aspect, the type of the second QCL parameter reported includes a type a or a type C.

The advantages of the method according to the above second aspect and possible designs thereof may be referred to the advantages of the first aspect and possible designs thereof.

In a third aspect, a communication method is provided, which may be performed by a terminal device, or may also be performed by a component (e.g., a chip or a circuit) of the terminal device, which is not limited, and for convenience of description, an example of the method performed by the terminal device will be described below.

The communication method comprises the following steps: the terminal equipment acquires a second quasi co-located QCL parameter of at least one third reference signal; the terminal device sends first information to the network device, wherein the first information comprises an identifier of the at least one third reference signal, and the first information is used for indicating the terminal device to store a second QCL parameter of the at least one third reference signal.

Based on the technical scheme, the terminal equipment reports the second QCL parameter condition of the stored reference signals, and the second QCL parameters of certain reference signals stored in the terminal equipment are defined so as to facilitate the subsequent relevant configuration based on the second QCL parameters.

With reference to the third aspect, in certain implementations of the third aspect, any one of the at least one third reference signal is the synchronization signal block SSB or the tracking reference signal TRS, or the any one of the at least one third reference signal and the synchronization signal block SSB or the tracking reference signal TRS satisfy the QCL relationship.

With reference to the third aspect, in certain implementations of the third aspect, the method further includes: the terminal device receives second indication information from the network device, where the second indication information is used to indicate to activate a transmission configuration indication state TCI-state, and when the at least one third reference signal includes a fourth reference signal corresponding to the TCI-state, the effective time of the TCI-state is a time after the first information is sent.

With reference to the third aspect, in certain implementations of the third aspect, the method further includes: the terminal equipment receives second indication information from the network equipment, wherein the second indication information is used for indicating an activated transmission configuration indication state TCI-state; when the fourth reference signal corresponding to the TCI-state meets the first condition, the effective moment of the TCI-state is the first moment; when the fourth reference signal corresponding to the TCI-state does not meet the first condition, the effective moment of the TCI-state is the second moment; the first condition includes that the fourth reference signal is one of the at least one third reference signal or that the fourth reference signal and one of the at least one third reference signal satisfy a QCL relationship, wherein the first time instant is earlier than the second time instant.

With reference to the third aspect, in some implementations of the third aspect, the first time is a time when a first duration passes from a time when the second indication information is received, and the second time is a time when a second duration passes from a time when the second indication information is received, where the second duration is greater than or equal to a sum of the first duration, a duration of waiting for the synchronization signal block SSB or the tracking reference signal TRS, and a duration of processing the SSB or TRS.

With reference to the third aspect, in certain implementations of the third aspect, the fourth reference signal and one of the at least one third reference signal satisfy a QCL relationship, including: the fourth reference signal and one of the at least one third reference signal satisfy an a-type QCL relationship, wherein the a-type QCL relationship includes that a channel experienced by an antenna port transmitting the fourth reference signal and a channel experienced by an antenna port transmitting the third reference signal share a common relation: doppler shift, doppler spread, average delay and delay spread.

With reference to the third aspect, in some implementations of the third aspect, a duration of a third time interval and a fourth time interval is less than or equal to the first threshold, where the third time is a time when the terminal device receives the third indication information, and the fourth time is a time when the terminal device sends the first information.

With reference to the third aspect, in certain implementations of the third aspect, the method further includes: the terminal device receives third indication information from the network device, where the third indication information is used to instruct the terminal device to report the type of the second QCL parameter, and the first information further includes fourth indication information, where the fourth indication information is used to instruct the terminal device to obtain the type of the second QCL parameter of the at least one third reference signal.

With reference to the third aspect, in some implementations of the third aspect, the type of the second QCL parameter reported includes a type a or a type C.

In a fourth aspect, a communication method is provided, which may be performed by a network device, or may also be performed by a component (e.g., a chip or a circuit) of the network device, which is not limited, and for convenience of description, will be described below with reference to the embodiment performed by the network device.

The communication method comprises the following steps: the network equipment receives first information from the terminal equipment, wherein the first information comprises an identifier of the at least one third reference signal, and the first information is used for indicating the terminal equipment to store a second quasi co-located QCL parameter of the at least one third reference signal; the network device determines a second QCL parameter of the terminal device that holds the at least one third reference signal.

With reference to the fourth aspect, in certain implementations of the fourth aspect, any one of the at least one third reference signal is the synchronization signal block SSB or the tracking reference signal TRS, or the any one of the at least one third reference signal and the synchronization signal block SSB or the tracking reference signal TRS satisfy the QCL relationship.

With reference to the fourth aspect, in certain implementations of the fourth aspect, the method further includes: the network device sends second indication information to the terminal device, where the second indication information is used to indicate to activate a transmission configuration indication state TCI-state, and when the at least one third reference signal includes a fourth reference signal corresponding to the TCI-state, the effective time of the TCI-state is a time after the first information is sent.

With reference to the fourth aspect, in certain implementations of the fourth aspect, the method further includes: the network equipment sends second indication information to the terminal equipment, wherein the second indication information is used for indicating an activated transmission configuration indication state TCI-state; when the fourth reference signal corresponding to the TCI-state meets the first condition, the effective moment of the TCI-state is the first moment; when the fourth reference signal corresponding to the TCI-state does not meet the first condition, the effective moment of the TCI-state is the second moment; the first condition includes that the fourth reference signal is one of the at least one third reference signal or that the fourth reference signal and one of the at least one third reference signal satisfy a QCL relationship, wherein the first time instant is earlier than the second time instant.

With reference to the fourth aspect, in some implementations of the fourth aspect, the first time is a time when a first duration passes from a time when the second indication information is received, and the second time is a time when a second duration passes from a time when the second indication information is received, where the second duration is greater than or equal to a sum of the first duration, a duration of waiting for the synchronization signal block SSB or the tracking reference signal TRS, and a duration of processing the SSB or TRS.

With reference to the fourth aspect, in certain implementations of the fourth aspect, the fourth reference signal and one of the at least one third reference signal satisfy a QCL relationship, including: the fourth reference signal and one of the at least one third reference signal satisfy an a-type QCL relationship, wherein the a-type QCL relationship includes that a channel experienced by an antenna port transmitting the fourth reference signal and a channel experienced by an antenna port transmitting the third reference signal share a common relation: doppler shift, doppler spread, average delay and delay spread.

With reference to the fourth aspect, in some implementations of the fourth aspect, a duration of a third time interval and a fourth time interval is less than or equal to a first threshold, where the third time interval is a time when the terminal device receives the third indication information, and the fourth time interval is a time when the terminal device sends the first information.

With reference to the fourth aspect, in certain implementations of the fourth aspect, the method further includes: the network device sends third indication information to the terminal device, where the third indication information is used to instruct the terminal device to report the type of the second QCL parameter, and the first information further includes fourth indication information, where the fourth indication information is used to instruct the type of the second QCL parameter of at least one third reference signal acquired by the terminal device.

With reference to the fourth aspect, in some implementations of the fourth aspect, the type of the second QCL parameter reported includes a type a or a type C.

The advantages of the method according to the above fourth aspect and possible designs thereof may be referred to the advantages of the third aspect and possible designs thereof.

In a fifth aspect, a communication device is provided for performing the method provided in the first aspect. Specifically, the communication device includes:

the receiving unit is used for receiving first configuration information from the network equipment, wherein the first configuration information is used for indicating the terminal equipment to report channel state information and comprises one or more identifiers of first reference signals; a transmitting unit, configured to transmit first information to the network device, where the first information includes channel state information of at least one second reference signal, and the at least one second reference signal is part or all of the one or more first reference signals; the first information includes first indication information, where the first indication information is used to indicate whether the communication device stores a first quasi co-located QCL parameter of the at least one second reference signal.

With reference to the fifth aspect, in certain implementations of the fifth aspect, the receiving unit is further configured to receive the one or more first reference signals from the network device.

With reference to the fifth aspect, in certain implementations of the fifth aspect, any one of the at least one third reference signal satisfies the QCL relationship with the synchronization signal block SSB or the tracking reference signal TRS.

With reference to the fifth aspect, in certain implementation manners of the fifth aspect, the first indication information indicates whether the terminal device stores the first QCL parameter of the at least one second reference signal, including: the first indication information indicates whether the terminal equipment stores the second QCL parameters of at least one third reference signal in the at least one second reference signal, and the first information further includes an identifier of the at least one third reference signal in the case that the first indication information indicates that the terminal equipment stores the second QCL parameters of the at least one third reference signal in the at least one second reference signal.

With reference to the fifth aspect, in certain implementation manners of the fifth aspect, the receiving unit is further configured to receive second indication information from the network device, where the second indication information is used to indicate an active transmission configuration indication state TCI-state;

When the fourth reference signal corresponding to the TCI-state meets the first condition, the effective moment of the TCI-state is the first moment; when the fourth reference signal corresponding to the TCI-state does not meet the first condition, the effective moment of the TCI-state is the second moment; the first condition includes that the fourth reference signal is one of the at least one third reference signal or that the fourth reference signal and one of the at least one third reference signal satisfy a QCL relationship, wherein the first time instant is earlier than the second time instant.

With reference to the fifth aspect, in some implementations of the fifth aspect, the first time is a time when a first duration passes from a time when the second indication information is received, and the second time is a time when a second duration passes from a time when the second indication information is received, where the second duration is greater than or equal to a sum of the first duration, a duration of waiting for the synchronization signal block SSB or the tracking reference signal TRS, and a duration of processing the SSB or the TRS.

With reference to the fifth aspect, in certain implementations of the fifth aspect, the fourth reference signal and one of the at least one third reference signal satisfy a QCL relationship, including: the fourth reference signal and one of the at least one third reference signal satisfy an a-type QCL relationship, wherein the a-type QCL relationship includes that a channel experienced by an antenna port transmitting the fourth reference signal and a channel experienced by an antenna port transmitting the third reference signal share a common relation: doppler shift, doppler spread, average delay and delay spread.

With reference to the fifth aspect, in some implementations of the fifth aspect, a duration of a third time interval and a fourth time interval is less than or equal to a first threshold, where the third time interval is a time when the receiving unit receives the third indication information, and the fourth time interval is a time when the sending unit sends the first information.

With reference to the fifth aspect, in certain implementations of the fifth aspect, the apparatus further includes: the receiving unit is configured to receive third indication information from the network device, where the third indication information is used to instruct the terminal device to report the type of the second QCL parameter, and the first information further includes fourth indication information, where the fourth indication information is used to indicate indication information of the type of the second QCL parameter of the at least one third reference signal acquired by the processing unit.

With reference to the fifth aspect, in certain implementations of the fifth aspect, the type of the second QCL parameter reported includes a type a or a type C.

The advantages of the method according to the above fifth aspect and possible designs thereof may be referred to the advantages of the first aspect and possible designs thereof.

In a sixth aspect, a communication device is provided for performing the method provided in the second aspect above. Specifically, the communication device includes:

A sending unit, configured to send first configuration information to a terminal device, where the first configuration information is used to instruct the terminal device to report channel state information, and the first configuration information includes one or more identifiers of first reference signals; a receiving unit, configured to receive first information from the terminal device, where the first information includes channel state information of at least one second reference signal, and the at least one second reference signal is part or all of the one or more first reference signals; the first information includes first indication information, where the first indication information is used to indicate whether the terminal device stores a first quasi co-located QCL parameter of the at least one second reference signal.

With reference to the sixth aspect, in certain implementations of the sixth aspect, the sending unit is further configured to send the one or more first reference signals to the terminal device.

With reference to the sixth aspect, in certain implementation manners of the sixth aspect, the first indication information indicates whether the terminal device stores the first QCL parameter of the at least one second reference signal, including: the first indication information indicates whether the terminal equipment stores the second QCL parameters of at least one third reference signal in the at least one second reference signal, and the first information further includes an identifier of the at least one third reference signal in the case that the first indication information indicates that the terminal equipment stores the second QCL parameters of the at least one third reference signal in the at least one second reference signal.

With reference to the sixth aspect, in certain implementations of the sixth aspect, any one of the at least one third reference signal satisfies the QCL relationship with the synchronization signal block SSB or the tracking reference signal TRS.

With reference to the sixth aspect, in some implementations of the sixth aspect, the sending unit is configured to send second indication information to the terminal device, where the second indication information is used to indicate an active transmission configuration indication status TCI-state; when the fourth reference signal corresponding to the TCI-state meets the first condition, the effective moment of the TCI-state is the first moment; when the fourth reference signal corresponding to the TCI-state does not meet the first condition, the effective moment of the TCI-state is the second moment; the first condition includes that the fourth reference signal is one of the at least one third reference signal or that the fourth reference signal and one of the at least one third reference signal satisfy a QCL relationship, wherein the first time instant is earlier than the second time instant.

With reference to the sixth aspect, in some implementations of the sixth aspect, the first time is a time when a first duration passes from a time when the second indication information is received, and the second time is a time when a second duration passes from a time when the second indication information is received, where the second duration is greater than or equal to a sum of the first duration, a duration of waiting for the synchronization signal block SSB or the tracking reference signal TRS, and a duration of processing the SSB or the TRS.

With reference to the sixth aspect, in certain implementations of the sixth aspect, the fourth reference signal and one of the at least one third reference signal satisfy a QCL relationship, including: the fourth reference signal and one of the at least one third reference signal satisfy an a-type QCL relationship, wherein the a-type QCL relationship includes that a channel experienced by an antenna port transmitting the fourth reference signal and a channel experienced by an antenna port transmitting the third reference signal share a common relation: doppler shift, doppler spread, average delay and delay spread.

With reference to the sixth aspect, in some implementations of the sixth aspect, a duration of a third time interval and a fourth time interval is less than or equal to a first threshold, where the third time interval is a time when the terminal device receives the third indication information, and the fourth time interval is a time when the terminal device sends the first information.

With reference to the sixth aspect, in certain implementations of the sixth aspect, the apparatus further includes: the sending unit is configured to send third indication information to the terminal device, where the third indication information is used to instruct the terminal device to report the type of the second QCL parameter, and the first information further includes fourth indication information, where the fourth indication information is used to instruct the type of the second QCL parameter of the at least one third reference signal acquired by the terminal device.

With reference to the sixth aspect, in some implementations of the sixth aspect, the type of the second QCL parameter reported includes a type a or a type C.

The advantages of the method according to the above sixth aspect and possible designs thereof may be referred to the advantages of the second aspect and possible designs thereof.

In a seventh aspect, a communication device is provided, which is configured to perform the method provided in the third aspect. Specifically, the communication device includes:

the processing unit is used for acquiring a second quasi co-location QCL parameter of at least one third reference signal; and a transmitting unit, configured to transmit first information to the network device, where the first information includes an identifier of the at least one third reference signal, and the first information is used to instruct the terminal device to store a second QCL parameter of the at least one third reference signal.

With reference to the seventh aspect, in certain implementations of the seventh aspect, any one of the at least one third reference signal is the synchronization signal block SSB or the tracking reference signal TRS, or the any one of the at least one third reference signal and the synchronization signal block SSB or the tracking reference signal TRS satisfy the QCL relationship.

With reference to the seventh aspect, in certain implementations of the seventh aspect, the apparatus further includes: and a receiving unit, configured to receive second indication information from the network device, where the second indication information is used to indicate that a transmission configuration indication state TCI-state is activated, and when the at least one third reference signal includes a fourth reference signal corresponding to the TCI-state, an effective time of the TCI-state is a time after the first information is sent.

With reference to the seventh aspect, in certain implementations of the seventh aspect, the apparatus further includes: a receiving unit, configured to receive second indication information from the network device, where the second indication information is used to indicate an active transmission configuration indication state TCI-state; when the fourth reference signal corresponding to the TCI-state meets the first condition, the effective moment of the TCI-state is the first moment; when the fourth reference signal corresponding to the TCI-state does not meet the first condition, the effective moment of the TCI-state is the second moment; the first condition includes that the fourth reference signal is one of the at least one third reference signal or that the fourth reference signal and one of the at least one third reference signal satisfy a QCL relationship, wherein the first time instant is earlier than the second time instant.

With reference to the seventh aspect, in certain implementations of the seventh aspect, the first time is a time when a first time period passes from a time when the second instruction information is received, and the second time is a time when a second time period passes from a time when the second instruction information is received, where the second time period is greater than or equal to a sum of the first time period, a time period for waiting for the synchronization signal block SSB or the tracking reference signal TRS, and a time period for processing the SSB or the TRS.

With reference to the seventh aspect, in certain implementations of the seventh aspect, the fourth reference signal and one of the at least one third reference signal satisfy a QCL relationship, including: the fourth reference signal and one of the at least one third reference signal satisfy an a-type QCL relationship, wherein the a-type QCL relationship includes that a channel experienced by an antenna port transmitting the fourth reference signal and a channel experienced by an antenna port transmitting the third reference signal share a common relation: doppler shift, doppler spread, average delay and delay spread.

With reference to the seventh aspect, in certain implementation manners of the seventh aspect, a duration of a third time and a fourth time interval is less than or equal to a first threshold, where the third time is a time when the receiving unit receives the third indication information, and the fourth time is a time when the sending unit sends the first information.

With reference to the seventh aspect, in certain implementations of the seventh aspect, the apparatus further includes: the receiving unit is configured to receive third indication information from the network device, where the third indication information is used to instruct the terminal device to report the type of the second QCL parameter, and the first information further includes fourth indication information, where the fourth indication information is used to indicate indication information of the type of the second QCL parameter of the at least one third reference signal acquired by the processing unit.

With reference to the seventh aspect, in some implementations of the seventh aspect, the type of the second QCL parameter reported includes a type a or a type C.

The advantages of the method according to the above seventh aspect and possible designs thereof may be referred to the advantages of the third aspect and possible designs thereof.

In an eighth aspect, there is provided a communication device for performing the method provided in the fourth aspect. Specifically, the communication device includes:

a receiving unit, configured to receive first information from a terminal device, where the first information includes an identifier of the at least one third reference signal, and the first information is used to instruct the terminal device to store a second quasi co-sited QCL parameter of the at least one third reference signal; and the processing unit is used for determining a second QCL parameter of the terminal equipment, which stores the at least one third reference signal.

With reference to the eighth aspect, in certain implementations of the eighth aspect, any one of the at least one third reference signal is the synchronization signal block SSB or the tracking reference signal TRS, or the any one of the at least one third reference signal and the synchronization signal block SSB or the tracking reference signal TRS satisfy the QCL relationship.

With reference to the eighth aspect, in certain implementations of the eighth aspect, the apparatus further includes: and the sending unit is used for sending second indication information to the terminal equipment, the second indication information is used for indicating to activate a transmission configuration indication state TCI-state, and when the at least one third reference signal comprises a fourth reference signal corresponding to the TCI-state, the effective time of the TCI-state is a time after the first information is sent.

With reference to the eighth aspect, in certain implementations of the eighth aspect, the apparatus further includes: a transmitting unit, configured to transmit second indication information to the terminal device, where the second indication information is used to indicate to activate a transmission configuration indication state TCI-state; when the fourth reference signal corresponding to the TCI-state meets the first condition, the effective moment of the TCI-state is the first moment; when the fourth reference signal corresponding to the TCI-state does not meet the first condition, the effective moment of the TCI-state is the second moment; the first condition includes that the fourth reference signal is one of the at least one third reference signal or that the fourth reference signal and one of the at least one third reference signal satisfy a QCL relationship, wherein the first time instant is earlier than the second time instant.

With reference to the eighth aspect, in certain implementations of the eighth aspect, the first time is a time when a first duration passes from a time when the second indication information is received, and the second time is a time when a second duration passes from a time when the second indication information is received, where the second duration is greater than or equal to a sum of the first duration, a duration of waiting for the synchronization signal block SSB or the tracking reference signal TRS, and a duration of processing the SSB or the TRS.

With reference to the eighth aspect, in certain implementations of the eighth aspect, the fourth reference signal and one of the at least one third reference signal satisfy a QCL relationship, including: the fourth reference signal and one of the at least one third reference signal satisfy an a-type QCL relationship, wherein the a-type QCL relationship includes that a channel experienced by an antenna port transmitting the fourth reference signal and a channel experienced by an antenna port transmitting the third reference signal share a common relation: doppler shift, doppler spread, average delay and delay spread.

With reference to the eighth aspect, in some implementations of the eighth aspect, a duration of a third time interval and a fourth time interval is less than or equal to a first threshold, where the third time interval is a time when the terminal device receives the third indication information, and the fourth time interval is a time when the terminal device sends the first information.

With reference to the eighth aspect, in certain implementations of the eighth aspect, the apparatus further includes: the sending unit is configured to send third indication information to the terminal device, where the third indication information is used to instruct the terminal device to report the type of the second QCL parameter, and the first information further includes fourth indication information, where the fourth indication information is used to instruct the type of the second QCL parameter of the at least one third reference signal acquired by the terminal device.

With reference to the eighth aspect, in some implementations of the eighth aspect, the type of the second QCL parameter reported includes a type a or a type C.

The advantages of the method according to the above eighth aspect and possible designs thereof may be referred to the advantages of the fourth aspect and possible designs thereof.

A ninth aspect provides a communications apparatus for performing the method provided in the first or third aspect above. In particular, the communication device may comprise means and/or modules, such as a processing unit and an acquisition unit, for performing the method provided by any of the above-mentioned implementations of the first or third aspect.

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

In another implementation manner, when the communication device is a chip, a chip system or a circuit in the terminal device, the transceiver unit may be an input/output interface, an interface circuit, an output circuit, an input circuit, a pin or a related circuit on the chip, the chip system or the circuit, etc.; the processing unit may be at least one processor, processing circuit or logic circuit, etc.

The advantages of the method according to the above sixth aspect and possible designs thereof may be referred to the advantages of the first aspect or the third aspect and possible designs thereof.

In a tenth aspect, there is provided a communication device for performing the method provided in the second or fourth aspect above. In particular, the communication device may comprise means and/or modules, such as a processing unit and an acquisition unit, for performing the method provided in the second or fourth aspect.

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

In another implementation, when the communication device is a chip, a system-on-chip or a circuit in the network device, the transceiver unit may be an input/output interface, an interface circuit, an output circuit, an input circuit, a pin, or a related circuit on the chip, the system-on-chip or the circuit; the processing unit may be at least one processor, processing circuit or logic circuit, etc.

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

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

In a twelfth aspect, there is provided a computer readable storage medium storing program code for device execution, the program code comprising instructions for performing the method provided by any one of the implementations of the first to fourth aspects.

In a thirteenth aspect, there is provided a computer program product containing instructions which, when run on a computer, cause the computer to perform the method provided by any one of the implementations of the first to fourth aspects described above.

In a fourteenth aspect, a chip is provided, the chip including a processor and a communication interface, the processor reading instructions stored on a memory through the communication interface, and executing the method provided by any implementation manner of the first aspect to the fourth aspect.

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

A fifteenth aspect provides a communication system comprising the communication apparatus of the fifth aspect and the communication apparatus of the sixth aspect, or comprising the communication apparatus of the seventh aspect and the communication apparatus of the eighth aspect.

Drawings

Fig. 1 is a schematic diagram of a communication system to which the present application is applicable.

Fig. 2 is a schematic diagram of beam training provided in the present application.

Fig. 3 is a schematic configuration diagram of a control resource set CORESET and search space provided in the present application.

Fig. 4 is a schematic diagram of a beam configuration update provided in the present application.

Fig. 5 is a schematic flow chart of a communication method provided in the present application.

Fig. 6 is a schematic diagram of a first moment and a second moment provided in the present application.

Fig. 7 is a schematic flow chart diagram of another communication method provided herein.

Fig. 8 is a schematic diagram of a communication device provided in the present application.

Fig. 9 is a schematic structural diagram of a terminal device of the present application.

Fig. 10 is a schematic diagram of another communication device provided herein.

Fig. 11 is a schematic structural diagram of a network device of the present application.

Detailed Description

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

The technical solution of the embodiment of the application can be applied to various communication systems, for example: fifth generation (5th generation,5G) systems or New Radio (NR), long term evolution (long term evolution, LTE) systems, LTE frequency division duplex (frequency division duplex, FDD) systems, LTE time division duplex (time division duplex, TDD), and the like. The technical scheme provided by the application can also be applied to future communication systems, such as a sixth generation mobile communication system. The technical solutions of the embodiments of the present application may also be applied to device-to-device (D2D) communication, vehicle-to-device (V2X) communication, machine-to-machine (machine to machine, M2M) communication, machine type communication (machine type communication, MTC), and internet of things (internet of things, ioT) communication systems or other communication systems.

To facilitate understanding of the embodiments of the present application, a communication system to which the present application is applicable will be briefly described first with reference to fig. 1.

The terminal device (terminal equipment) in the embodiment of the present application may refer to an access terminal, a subscriber unit, a subscriber station, a mobile station, a relay station, a remote terminal, a mobile device, a user terminal (UE), a terminal (terminal), a wireless communication device, a user agent, or a user equipment. The terminal device may also be a cellular telephone, a cordless telephone, a session initiation protocol (session initiation protocol, SIP) phone, a wireless local loop (wireless local loop, WLL) station, a personal digital assistant (personal digital assistant, PDA), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a 5G network or a terminal device in a future evolved public land mobile network (public land mobile network, PLMN) or a terminal device in a future internet of vehicles, etc., as the embodiments of the application are not limited in this regard.

As an example and not by way of limitation, in the embodiments of the present application, the wearable device may also be referred to as a wearable smart device, which is a generic term for applying wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, apparel, shoes, and the like. The wearable device is a portable device that is worn directly on the body or integrated into the clothing or accessories of the user. The wearable device is not only a hardware device, but also can realize a powerful function through software support, data interaction and cloud interaction. The generalized wearable smart device includes full functionality, may not rely on a smart phone to implement complete or partial functionality, such as: smart watches or smart glasses, etc., and focus on only certain types of application functions, and need to be used in combination with other devices, such as smart phones, for example, various smart bracelets, smart jewelry, etc. for physical sign monitoring.

In addition, in the embodiment of the application, the terminal device may also be a terminal device in an IoT system, where IoT is an important component of future information technology development, and the main technical feature is to connect the article with a network through a communication technology, so as to implement man-machine interconnection and an intelligent network for interconnecting the articles. In the embodiment of the application, the IOT technology can achieve mass connection, deep coverage and terminal power saving through a Narrowband (NB) technology, for example.

In addition, in the embodiment of the present application, the terminal device may further include a sensor, and the main functions include collecting data (part of the terminal device), receiving control information of the network device and downlink data, and transmitting electromagnetic waves to the network device to transmit uplink data.

The network device in the embodiment of the present application may be any communication device having a wireless transceiver function for communicating with a terminal device. The apparatus includes, but is not limited to: an evolved Node B (eNB), a radio network controller (radio network controller, RNC), a Node B (Node B, NB), a home evolved Node B, heNB, or home Node B, HNB, a Base Band Unit (BBU), an Access Point (AP), a radio relay Node, a radio backhaul Node, a transmission point (transmission point, TP), or a transmission reception point (transmission and reception point, TRP) in a wireless fidelity (wireless fidelity, WIFI) system, or the like, may also be a gNB in a 5G system, or a transmission point (TRP or TP) in a NR system, one or a group (including a plurality of antenna panels) of antenna panels of a base station in a 5G system, or may also be a network Node constituting a gNB or a transmission point, such as a Base Band Unit (BBU), or a Distributed Unit (DU), or the like.

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

Further, the CUs can be further divided into a central unit (CU-control plane, CU-CP) of the control plane and a central unit (CU-user plane, CU-UP) of the user plane. The CU-CP and the CU-UP may be disposed on different physical devices, and the CU-CP is responsible for a control plane function and mainly includes an RRC layer and a PDCP control plane (PDCP-C) layer. The PDCP-C layer is mainly responsible for encryption and decryption of control plane data, integrity protection, data transmission and the like. The CU-UP is responsible for user plane functions, mainly including an SDAP layer and a PDCP user plane (PDCP-U) layer. Wherein the SDAP layer is mainly responsible for processing data of the core network and mapping flows (flows) to bearers. The PDCP-U layer is mainly responsible for at least one function of encryption and decryption of a data surface, integrity protection, header compression, sequence number maintenance, data transmission and the like. Specifically, CU-CP and CU-UP are connected through a communication interface (e.g., E1 interface). CU-CP stands for network device connected to core network device through a communication interface (e.g., ng interface), and connected to DU through a communication interface (e.g., F1-C (control plane) interface). CU-UP is connected to DU through a communication interface (e.g., F1-U (user plane) interface).

In yet another possible implementation, the PDCP-C layer is also included in the CU-UP.

It is to be understood that the above protocol layer partitioning for CU and DU, and CU-CP and CU-UP is only an example, and other partitioning methods are possible, which the embodiments of the present application do not limit.

The network device mentioned in the embodiments of the present application may be a device including a CU, or a DU, or a device including a CU and a DU, or a device of a control plane CU node (CU-CP node) and a user plane CU node (CU-UP node) and a DU node.

Network devices and terminal devices may be deployed on land, including indoors or outdoors, hand-held or vehicle-mounted; the device can be deployed on the water surface; but also on aerial planes, balloons and satellites. In the embodiment of the application, the scene where the network device and the terminal device are located is not limited.

In the embodiment of the application, the terminal device or the network device includes a hardware layer, an operating system layer running above the hardware layer, and an application layer running above the operating system layer. The hardware layer includes hardware such as a central processing unit (central processing unit, CPU), a memory management unit (memory management unit, MMU), and a memory (also referred to as a main memory). The operating system may be any one or more computer operating systems that implement business processes through processes (processes), such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a windows operating system. The application layer comprises applications such as a browser, an address book, word processing software, instant messaging software and the like.

Furthermore, various aspects or features of the present application may be implemented as a method, apparatus, or article of manufacture using standard programming and/or engineering techniques. The term "article of manufacture" as used herein encompasses a computer program accessible from any computer-readable device, carrier, or media. For example, computer-readable media may include, but are not limited to: magnetic storage devices (e.g., hard disk, floppy disk, or magnetic tape, etc.), optical disks (e.g., compact Disk (CD), digital versatile disk (digital versatile disc, DVD), etc.), smart cards, and flash memory devices (e.g., erasable programmable read-only memory (EPROM), cards, sticks, key drives, etc.). Additionally, various storage media described herein can represent one or more devices and/or other machine-readable media for storing information. The term "machine-readable storage medium" can include, without being limited to, wireless channels and various other media capable of storing, containing, and/or carrying instruction(s) and/or data.

To facilitate understanding of the embodiments of the present application, a communication system suitable for the embodiments of the present application will be described in detail first with reference to the communication system shown in fig. 1 as an example. As shown in fig. 1, the communication system 100 may include at least one network device, such as the network device 101 shown in fig. 1. The communication system 100 may also include at least one terminal device, such as the terminal devices 102-107 shown in fig. 1. Wherein the terminal devices 102 to 107 may be mobile or stationary. One or more of network device 101 and terminal devices 102-107 may each communicate over a wireless link. Each network device may provide communication coverage for a particular geographic area and may communicate with terminal devices located within the coverage area.

Alternatively, the terminal devices may communicate directly with each other. Direct communication between terminal devices may be implemented, for example, using device-to-device (D2D) technology or the like. As shown in fig. 1, communication may be directly performed between the

terminal devices

105 and 106, and between the

terminal devices

105 and 107 using D2D technology. Terminal device 106 and terminal device 107 may communicate with terminal device 105 separately or simultaneously.

Terminal devices 105 to 107 may also communicate with network device 101, respectively. For example, may communicate directly with network device 101, as

terminal devices

105 and 106 in the figures may communicate directly with network device 101; or indirectly with the network device 101, as in the figure the terminal device 107 communicates with the network device 101 via the terminal device 105.

Each communication device may be configured with a plurality of antennas. For each communication device in the communication system 100, the plurality of antennas configured may include at least one transmit antenna for transmitting signals and at least one receive antenna for receiving signals. Accordingly, communication may be performed between the communication devices in the communication system 100 via multiple antenna techniques.

It should be appreciated that fig. 1 is a simplified schematic diagram that is merely illustrative for ease of understanding, and that other network devices or other terminal devices may be included in the communication system 100, which are not shown in fig. 1. For example, a core network device may also be included in communication system 100. The access network equipment provides wireless access connection for the terminal equipment on one hand, and can send data to the terminal equipment or receive the data sent by the terminal equipment; on the other hand, the access network device and the core network device are also connected, and can forward the data received from the terminal device to the core network or receive the data required to be sent to the terminal device from the core network.

To facilitate an understanding of the embodiments of the present application, several basic concepts involved in the embodiments of the present application are briefly described. It should be understood that the basic concepts described below are described in brief by taking the basic concepts specified in the NR protocol as an example, but the embodiments of the present application are not limited to be applied to NR systems only. Therefore, the standard names appearing in the description of the NR system as an example are all functional descriptions, and specific names are not limited, and only indicate functions of the device, and can be correspondingly extended to other systems in the future.

1. Millimeter wave frequency bands.

The millimeter wave band is generally considered to be the electromagnetic wave band having a frequency range from 30GHz to 300 GHz. Compared with the traditional sub-6GHz frequency band (450 MHz-6000 Mhz), the millimeter wave has wider frequency spectrum resources, so that the transmission with high data rate can be supported, and meanwhile, the wavelength of the millimeter wave is small, so that the antenna size is smaller, the integration of multiple antennas is more convenient, and millimeter wave communication is a key technology in a 5G communication system and a future communication system. Meanwhile, compared with the traditional sub-6GHz frequency band, the channel attenuation of the millimeter wave frequency band is very large, so that the equipment for communication in the millimeter wave frequency band needs to utilize beam forming or other technologies, and specific spatial filtering parameters are adopted to enable the energy of signals to be concentrated in a specific direction, namely in the specific beam direction, so that the equivalent channel gain between receiving and transmitting equipment is improved, and the coverage performance and the transmission data rate of millimeter wave communication are ensured.

2. Beam training and tracking.

In the initial stage of connection establishment of the transceiver, as information such as positions and channels among the transceiver are generally unknown, the transceiver needs to perform a beam training process to find a suitable beam direction and corresponding spatial filtering parameters. The beam training process between the base station and the terminal in the existing NR system is completed by a channel state information reporting (Channel state information, CSI-reporting) process. The main process is that the network equipment firstly configures a plurality of channel state information reference signals (Channel state information reference signal, CSI-RS) for the terminal equipment, wherein the channel state information reference signals comprise time-frequency position, index, port number, port pattern and other information of each CSI-RS. The CSI-RS may be a synchronization signal/physical broadcast channel block (Synchronization signal/Physical broadcast channel block, SSB) or a Non-zero-power CSI-RS (NZP-CSI-RS). When the network device transmits each CSI-RS, different spatial domain transmission parameters may be used, i.e., the network device transmits the reference signal in different beam directions. The terminal equipment receives and measures reference signal receiving power (Reference signal received power, RSRP) or signal-to-interference and noise ratio (Signal to interference and noise ratio, SINR) of each CSI-RS configured by the network equipment, and then reports the reference signal indexes of a plurality of CSI-RSs with higher RSRP or SINR and corresponding RSRP quantized values thereof. The terminal device may also use different reception beams when receiving and measuring CSI-RS, i.e. for each transmission Beam of the network device, the terminal device may train its own corresponding best reception Beam, and complete Beam Pair Link (BPL) training. After the network device receives the report information of the terminal device, the network device knows the transmitting beams adopted for transmitting each CSI-RS, so the network device can finally determine which beam directions are adopted to transmit signals so that the terminal device receives signals with higher energy, and the terminal device can also determine corresponding receiving beams for each transmitting beam direction of the network device, thereby finally completing the beam training process.

After the connection between the terminal device and the network device is established, the network device periodically transmits CSI-RS for beam tracking to the terminal device in order to maintain the beam alignment between the terminal device and the network device, and the terminal device correspondingly transmits measurement reports of these CSI-RS for tracking to the network device, considering that the terminal device is mobile and that occlusion may occur between the terminal device and the network device, resulting in that an optimal BPL may change between the terminal device and the network device.

For ease of understanding, the beam training process is described in conjunction with fig. 2, and fig. 2 is a schematic diagram of beam training provided in the present application. As can be seen from fig. 2, the network device transmits reference signals in different beam directions (NZP-CSI-rs#1, NZP-CSI-rs#2 and NZP-CSI-rs#3 as shown in fig. 2). The terminal device receives and measures the reference signal RSRP, and then reports the CSI measurement report (e.g., reports the reference signal indexes of several CSI-RSs with higher RSRP and the corresponding RSRP quantized values). As can be seen from fig. 2, the terminal device may also use different reception beams (reception beam #1, reception beam #2, and reception beam #3 as shown in fig. 2) when receiving and measuring CSI-RS.

3. Quasi co-location (QCL).

QCL in NR system is defined as: two channel QCLs can be considered if the channel large scale characteristics characterized by one antenna port over one symbol can be inferred from the channel large scale characteristics characterized by the other antenna port over one symbol. Four QCL parameter types are defined in NR as follows:

- 'typeA': { Doppler shift, doppler spread, average delay, delay spread }

- 'typeB': doppler shift, doppler spread }

"typeC" ({ Doppler shift, average delay })

- 'typeD': spatial reception parameter }

Wherein, acquiring Doppler shift can be understood as completing frequency domain synchronization; obtaining the average time delay can be understood as completing time domain synchronization; the acquired doppler spread and delay spread may be used for channel estimation.

the QCL parameter of typeD (which may also be referred to as a D-type QCL parameter) indicates that the spatial reception parameters adopted by the two antenna ports are the same or similar, and is used to assist the receiving device in determining its own reception beam, and in this application, the spatial reception parameter may be understood as a reception beam, and the reception beam may be understood as a spatial reception parameter, unless otherwise specified. Considering that connection is established based on BPL in NR, QCL relationship of typeD can be understood as the same or similar spatial transmission parameters adopted by two antenna ports.

After the network device configures QCL relations of different reference signals or channels, the receiving efficiency of the terminal device for receiving data or control channels can be improved. For example, when the network device first configures some CSI-RSs to the terminal device, the terminal device may measure and process these CSI-RSs to obtain one or more of the above QCL parameters, for example, determine the best reception beam (D-type QCL parameter) of each CSI-RS through reception beam training, and measure the average delay and doppler shift of each CSI-RS, so as to determine the time-frequency offset synchronization information corresponding to the CSI-RS, and when the CSI-RS is a TRS, the terminal device may also measure delay spread information and doppler spread information of the TRS. And then, when the network equipment indicates (Demodulation reference signal, DMRS) of the control resource set (Control Resource Set, CORESET) and a CSI-RS type QCL in a certain beam training process to the terminal equipment, the terminal equipment can detect downlink control information (Downlink control information, DCI) on the CORESET by using a received beam which previously receives the CSI-RS, and when the network equipment configures the network equipment to indicate the DMRS of CORESET and a certain CSI-RS type a QCL to the terminal equipment, the terminal can receive and detect the DCI according to the previously obtained time-frequency offset synchronization information, and simultaneously perform channel estimation by utilizing the previously obtained delay spread and doppler spread, and then perform demodulation and decoding of the DCI.

Specifically, the QCL relationship may be configured and indicated by transmitting a configuration indication state (Transmission Configuration Indicator state, TCI-state):

illustratively, a TCI-state contains a downlink reference signal and the QCL relationship type of the reference signal; or, one TCI-state includes the indication information of the first downlink reference signal and the QCL relation type corresponding to the reference signal, and the second downlink reference signal and the QCL type corresponding to the reference signal. The QCL relationship type corresponding to the first downlink reference signal is typeA, typeB, or typeC, and the QCL relationship type corresponding to the second downlink reference signal is typeD.

4. Configuration of control channels and beam pointing.

DCI between network equipment and terminal equipment in an NR system is borne on a physical downlink control channel (physical downlink control channel, PDCCH), and because the terminal equipment does not know whether the network equipment issues DCI and specifically where DCI exists in advance, the network equipment determines candidate periodic time-frequency resource positions by configuring CORESEET and Search Space (SS) for the terminal equipment in advance, and then instructs the terminal equipment to perform blind detection of the PDCCH at the positions so as to determine whether the network equipment schedules data transmission of the terminal equipment, report channel state information and the like.

The configuration information of CORESET configures information such as a frequency domain position, a symbol number, a resource mapping mode, a TCI-State, and the like of CORESET. TCI-State is used to indicate QCL source Reference Signal (RS) of DMRS of PDCCH on CORESET for channel reception and channel estimation of PDCCH. In a specific implementation process, the configuration information of the RRC layer about CORESET includes a plurality of TCI-states, and one of the TCI-states is activated at the MAC layer by a MAC Control Element (CE).

After a certain CORESET is configured or a certain TCI-State is activated, the receiving device may assist channel estimation when PDCCH blind detection is performed on the CORESET, or determine a receiving beam used when PDCCH blind detection is performed on the CORESET, by a channel characteristic of a reference signal indicated by the TCI-State.

The configuration information of the searchSpace configures the type of the searchSpace, namely the user-specific or cell-specific, the period (the time slot number is taken as a unit) of the searchSpace and the offset in the period, the initial symbol position in the detected time slot, the candidate physical downlink channel numbers under various aggregation levels, the supported DCI format and other information. Each searchSpace is associated with one CORESET to determine a specific time-frequency location for blind detection of the PDCCH.

For ease of understanding, the configuration of CORESET and searchSpace is described in connection with fig. 3. Fig. 3 is a schematic configuration diagram of a control resource set CORESET and search space provided in the present application. As can be seen from fig. 3, the network device configures two CORESET (coreset#0 and coreset#1 as shown in fig. 3) for the terminal device, where coreset#0 occupies 2 symbols, 12 PRBs in the frequency domain, coreset#1 occupies 1 symbol, and 24 PRBs in the frequency domain; meanwhile, the network device also configures 2 searchspaces (ss#0 and ss#1 as shown in fig. 3) for the terminal device, where ss#0 is associated with coreset#0, a period is 1 slot (slot), a start symbol appears in symbol 0 in a corresponding slot, ss#1 is associated with coreset#1, a period is 2 slots, and a start symbol appears in symbol 0 in a corresponding slot.

5. Data channel beam configuration.

The data of the physical layer in the NR system is typically carried on a physical downlink shared channel (Physical downlink shared channel, PDSCH) and is typically scheduled by DCI, which may include time-frequency location indication information of the PDSCH and reception beam indication information of the PDSCH. The specific indication flow is as follows:

firstly, the network equipment configures a plurality of TCI-states available for PDSCH for the terminal equipment through RRC layer signaling;

The network device then activates several TCI-states therein via the MAC CE.

When the network device schedules PDSCH through DCI, the DCI may include a TCI code point (TCI code point) field, and different values of the TCI code point field and the activated TCI-state have a one-to-one correspondence, so that the network device may indicate to the terminal device through the TCI code point in the DCI a reception beam that the scheduled PDSCH should use.

The indication method mainly has the following advantages: the first point is that, considering the limited payload (payload) in DCI, the set size of available TCI-states is reduced after activation by MAC CE, thus reducing the indication overhead of TCI codebook as well; the second point is that the terminal equipment can only maintain the channel information corresponding to the TCI-state activated by the MAC CE, thereby reducing the implementation complexity of the terminal equipment.

6. Beam configuration update.

When the terminal equipment moves, shielding occurs between the terminal equipment and the network equipment, when the surrounding scatterer environment changes and the like occur, the optimal BPL of the terminal equipment and the network equipment changes, the terminal equipment reports the change condition of the optimal wave beam of the network equipment through the CSI, and after the network equipment receives the report information, the TCI-state of CORESET of the terminal equipment needs to be configured again, or a new activated TCI-state is added to the PSSCH, so that the network equipment and the terminal equipment can send and receive control information or data information on the new BPL.

For ease of understanding, the beam configuration update flow is described in conjunction with fig. 4, and fig. 4 is a schematic diagram of a beam configuration update provided in the present application. As can be seen from fig. 4, the beam configuration update procedure includes:

firstly, a network device sends a MAC CE to a terminal device for activating a new TCI-state;

then, the terminal device demodulates and decodes the MAC CE and replies (ACK); in addition, the terminal device needs to process and parse the specific information of the MAC CE, and indicates to each layer of protocol stack that the network device may send through a new TCI-state.

The use of the actual new TCI-state also requires waiting for and processing an SSB. The QCL relationship of typeA or typeC is present between the 1 reference signals in the new TCI-state and the SSB, for example, the TCI-state may contain 1 reference signal or 2 reference signals, and the QCL relationship of typeA or typeC is present between the SSB and the 1 reference signals in the new TCI-state, because in different beam directions, the signals received by the terminal device have different propagation paths in space, so that in the new beam direction, the terminal device needs to perform time-frequency synchronization again in the new beam direction (i.e. calculate average delay and average doppler frequency offset).

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

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

The information indicated by the indication information is called information to be indicated, and in a specific implementation process, various ways for indicating the information to be indicated exist. For example, but not limited to, the information to be indicated may be directly indicated, such as the information to be indicated itself or an index of the information to be indicated, etc. The information to be indicated can also be indicated indirectly by indicating other information, wherein the other information and the information to be indicated have an association relation. It is also possible to indicate only a part of the information to be indicated, while other parts of the information to be indicated are known or agreed in advance. For example, the indication of the specific information may also be achieved by means of a pre-agreed (e.g., protocol-specified) arrangement sequence of the respective information, thereby reducing the indication overhead to some extent. And meanwhile, the universal part of each information can be identified and indicated uniformly, so that the indication cost caused by independently indicating the same information is reduced. For example, it will be appreciated by those skilled in the art that the precoding matrix is composed of precoding vectors, and that each precoding vector in the precoding matrix may have the same portion in terms of composition or other properties.

The specific indication means may be any of various existing indication means, such as, but not limited to, the above indication means, various combinations thereof, and the like. Specific details of various indications may be referred to the prior art and are not described herein. As can be seen from the above, for example, when multiple pieces of information of the same type need to be indicated, different manners of indication of different pieces of information may occur. In a specific implementation process, a required indication mode can be selected according to specific needs, and in this embodiment of the present application, the selected indication mode is not limited, so that the indication mode according to the embodiment of the present application should be understood to cover various methods that can enable a party to be indicated to learn information to be indicated.

In addition, there may be other equivalent forms of information to be indicated, for example, a row vector may be represented as a column vector, a matrix may be represented by a transposed matrix of the matrix, a matrix may also be represented as a vector or an array, the vector or array may be formed by interconnecting respective row vectors or column vectors of the matrix, and so on. The technical solutions provided in the embodiments of the present application should be understood to cover various forms. For example, reference to some or all of the features of the embodiments of the present application should be understood to encompass various manifestations of such features.

The information to be indicated can be sent together as a whole or can be divided into a plurality of pieces of sub-information to be sent separately, and the sending periods and/or sending occasions of the sub-information can be the same or different. The specific transmission method is not limited in this application. The transmission period and/or the transmission timing of the sub-information may be predefined, for example, predefined according to a protocol, or may be configured by the transmitting end device by transmitting configuration information to the receiving end device. The configuration information may include, for example, but not limited to, one or a combination of at least two of radio resource control signaling, medium access control (media access control, MAC) layer signaling, and physical layer signaling. Wherein radio resource control signaling such as packet radio resource control (radio resource control, RRC) signaling; the MAC layer signaling includes, for example, a MAC Control Element (CE); the physical layer signaling includes, for example, DCI.

Second, the first, second, and various numerical numbers (e.g., "#1", "# 2") in this application are merely for convenience of description and are not intended to limit the scope of embodiments of the present application. For example, different information is distinguished, etc.

Third, in this application, "preset" may include signaling by the network device or predefined, e.g., protocol definition. The "pre-defining" may be implemented by pre-storing corresponding codes, tables or other manners that may be used to indicate relevant information in devices (including, for example, terminal devices and network devices), and the application is not limited to a specific implementation manner thereof.

Fourth, references to "save" in embodiments of the present application may refer to saving in one or more memories. The one or more memories may be provided separately or may be integrated in an encoder or decoder, processor, or communication device. The one or more memories may also be provided separately in part, and integrated in the decoder, processor, or communication device. The type of memory may be any form of storage medium, and this application is not limited in this regard.

Fifth, the "protocol" referred to in the embodiments of the present application may refer to a standard protocol in the field of communications, and may include, for example, an LTE protocol, an NR protocol, and related protocols applied in a future communication system, which is not limited in this application.

Sixth, in the embodiment of the present application, the control channel may include other physical layer control channels such as PUCCH, enhanced physical uplink control channel (enhanced physical uplink control channel, EPUCCH), etc., but for convenience of description, the following terms or concepts will be described by taking PUCCH as an example only, but the embodiment of the present application is not limited thereto.

It should be understood that, in the embodiment of the present application, the uplink control channel is taken as an example of the physical uplink control channel PUCCH, but the embodiment of the present application is not limited to this, and in fact, the uplink control channel may be defined as other terms or concepts, and all the technical solutions of the embodiments of the present application are applicable. In the embodiment of the present application, the uplink control channel and the PUCCH may be used alternately, and the PUCCH may be considered as an example description of the uplink control channel.

Seventh, in the embodiment of the present application, terms and english abbreviations, such as Downlink Control Information (DCI), medium access control element (MAC-CE), radio Resource Control (RRC), physical Downlink Control Channel (PDCCH), physical Downlink Shared Channel (PDSCH), control resource set (CORESET), channel state information reference signal (CSI-RS), sounding Reference Signal (SRS), synchronization signal/physical broadcast channel (SS/PBCH), synchronization Signal Block (SSB), transmission configuration indication status (TCI-state), etc., are given as exemplary examples for convenience of description, and should not constitute any limitation to the present application. This application does not exclude the possibility of defining other terms in existing or future protocols that perform the same or similar functions.

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

Ninth, the time of receiving certain information referred to herein may be understood as the time of starting to receive the information, and may be understood as the time of completing the reception of the information.

The scenario in which the communication method provided by the embodiment of the present application can be applied is briefly described above with reference to fig. 1, and basic concepts possibly related to the embodiment of the present application are described, and the communication method provided by the embodiment of the present application will be described in detail with reference to the accompanying drawings.

As can be seen from the above beam configuration update, after the MAC CE that activates the new TCI-state transmits, the terminal device may need to wait for a long time to actually receive the control information and/or the data information in the beam direction indicated by the new TCI-state, which affects the actual data transmission rate of the terminal device.

Before the new TCI-state is activated, the terminal device typically measures and reports the corresponding CSI-RS, so that the terminal device has acquired the partial typeC QCL information corresponding to the CSI-RS when measuring the CSI-RS. The method for updating the beam configuration is as follows: the terminal device records the typeC QCL information of the reference signal (for example, the network device configures the terminal device to record and maintain the information for a period of time), and after the network device activates the new TCI-state, the terminal device actually still has the time-frequency offset synchronization information under the beam, so that it is unnecessary to wait for SSB additionally.

But this method of beam configuration update may have the following problems:

1) The resolution of the frequency offset is generally determined by the length of the measurement time, the longer the measurement time length, the higher the frequency offset resolution. While one port of the CSI-RS for beam training typically occupies only one symbol in one slot. The accuracy of the obtained typeC QCL parameters is low.

2) The CSI-RS used for beam training is usually measured by the terminal device, only the typeC and QCL parameters of typeD corresponding to the reference signal can be obtained, the typeA QCL parameters cannot be obtained, the typeA QCL parameters are important for channel estimation, when the terminal device does not have the typeA parameters, the accuracy of channel estimation by the terminal device can be reduced, the accuracy of control or data channel demodulation decoding by the terminal device can be possibly affected, equivalently, the network device can wait until the terminal device subsequently receives the tracking reference signal (Tracking reference signal, TRS) to send control and data information to the terminal device by using a new beam, and a larger time delay can be brought.

The embodiment of the application provides a communication method, when a terminal device reports channel state information, whether QCL parameters of certain reference signals are included or not is synchronously reported, so that network devices can acquire the QCL parameter conditions of the reference signals stored by the terminal device, and further under the condition that the effective time of a new activated TCI-state is determined based on the QCL parameter information, the efficiency of activating the new TCI-state can be improved.

It should be appreciated that the communication method provided by the embodiments of the present application may be applied to a system that communicates through multiple antenna technology, such as the communication system 100 shown in fig. 1. The communication system may comprise at least one network device and at least one terminal device. The network device and the terminal device may communicate via multiple antenna technology.

It should also be understood that the embodiments shown below are not particularly limited to the specific structure of the execution body of the method provided by the embodiments of the present application, as long as the communication can be performed by the method provided according to the embodiments of the present application by running the program recorded with the code of the method provided by the embodiments of the present application, and for example, the execution body of the method provided by the embodiments of the present application may be a terminal device or a network device, or a functional module in the terminal device or the network device that can call the program and execute the program.

The communication method provided in the embodiment of the present application is described in detail below by taking interaction between a network device and a terminal device as an example.

Fig. 5 is a schematic flow chart of a communication method provided in the present application. The method comprises the following steps:

s510, the network device sends the first configuration information to the terminal device, or the terminal device receives the first configuration information from the network device.

The first configuration information is used for indicating the terminal equipment to report the channel state information, and the first configuration information comprises one or more identifiers of the first reference signals.

Wherein the identification of the first reference signal is used to identify the first reference signal, including but not limited to: an index of the first reference signal, an identification of the first reference signal, etc. The identification of the first reference signal can be used to indicate the one reference signal, and the specific form is not limited in this application.

The first configuration information may be used to instruct the terminal device to report the channel state information, where the reporting may be: the first configuration information is used for indicating the terminal equipment to measure and report the RSRP value or SINR value of one or more first reference signals. The RSRP value or SINR value of the first reference signal may be reported as follows: and reporting the quantized value of the RSRP or the SINR of the first reference signal.

The first reference signal includes a CSI-RS. For example, the first reference signal may be an NZP-CSI-RS. It should be understood that the first reference signal may also be other reference signals capable of implementing the channel state information reference signal function, which is not limited in any way in this application.

As one possible implementation, the first reference signal may be configured to have a typeA QCL or typeC QCL relationship with the SSB and/or TRS (hereinafter TRS for ease of description), i.e., the first reference signal and the TRS have the same or similar average delay and doppler frequency offsets.

As another possible implementation, the first reference signal may be configured to have a typeD QCL relationship with the TRS, i.e., the first reference signal and the TRS have the same or similar spatial transmission/reception parameters.

Since the TRS can occupy a plurality of symbols in one slot, when the QCL parameter corresponding to the TRS is measured for the TRS, the measurement time length is longer than that of the CSI-RS for beam training, so that the accuracy of the measured QCL parameter can be improved. When the first reference signal is configured to have a QCL relationship with the TRS, the QCL parameter of the first reference signal may refer to the QCL parameter of the TRS, and the accuracy is also higher.

For example, the network device configures a plurality of TRSs (e.g., trs#1, trs#2, and trs#3) for the terminal device. The network device configures a plurality of first reference signals (e.g., NZP-CSI-RS#1, NZP-CSI-RS#2, and NZP-CSI-RS#3) for the terminal device. The network device configures the terminal device with NZP-CSI-RS#1 and TRS#1 having typeA QCL relationship and typeD QCL relationship, NZP-CSI-RS#2 and TRS#2 having typeA QCL relationship and typeD QCL relationship, and NZP-CSI-RS#3 and TRS#3 having typeAQCL relationship and typeD QCL relationship.

As yet another possible implementation, the first reference signal may be configured to indirectly have a QCL relationship with the TRS, i.e., the first reference signal and the TRS have the same or similar average delay and doppler frequency offsets, and the same or similar spatial transmit/receive parameters.

For example, the network device is configuring a plurality of SSBs (e.g., trs#1, trs#2, and trs#3) for the terminal. The network device configures a plurality of first reference signals (e.g., NZP-CSI-RS#1, NZP-CSI-RS#2, and NZP-CSI-RS#3) for the terminal device. The network equipment configures the terminal equipment with the NZP-CSI-RS#1 and the NZP-CSI-RS#4 having a QCL relationship, the NZP-CSI-RS#2 and the NZP-CSI-RS#5 having a QCL relationship, and the NZP-CSI-RS#3 and the NZP-CSI-RS#6 having a QCL relationship; meanwhile, the network device configures the terminal device with the NZP-CSI-RS#4, the NZP-CSI-RS#5 and the NZP-CSI-RS#6 to have QCL relations with the TRS#1, the TRS#2 and the TRS#3 respectively, so that the NZP-CSI-RS#1, the NZP-CSI-RS#2 and the NZP-CSI-RS#3 can be considered to have QCL relations with the TRS#1, the TRS#2 and the TRS#3 indirectly.

When reference is made to the indirect QCL relationship hereinafter again, reference may be made to the description herein of the indirect QCL relationship, i.e. reference may be made to the direct QCL relationship or the indirect QCL relationship, and the definition of the indirect QCL relationship will not be repeated hereinafter.

In the two possible implementations described above, it may be understood that the terminal device may also receive the SSB (or TRS) and obtain QCL parameters of the SSB, and the method flow shown in fig. 5 may include:

S511, the network device sends an SSB (or TRS) to the terminal device, or the terminal device receives the SSB (or TRS) from the network device.

Specifically, the network device may transmit the SSB (or TRS) according to a time-frequency location of the SSB (or TRS). The terminal device may receive the SSB (or TRS). Wherein SSBs (or TRSs) occupy a plurality of symbols in one slot. The TRS is used for time-frequency offset synchronization by the terminal device, and may also be used for delay spread and doppler spread (or frequency spread) of the terminal device estimated channel.

As one way of realisation, SSBs (or TRSs) are periodic.

In one implementation, the network device may transmit SSBs (or TRSs) in multiple beam directions, which may include the beam directions being used by the network device and the terminal device control and data channels, as well as some other alternate beam directions.

These alternate beam directions may be, for example, beam directions being used by other terminal devices.

For example, the network device transmits SSBs (or TRSs) in beam directions #1, #2, and #3, where beam directions #1 and #2 are beam directions being used by the network device and the terminal device control channels and the data channels, and beam direction #3 is a beam direction being used by the network device and the other terminal device control channels and the data channels.

Illustratively, after the terminal device receives the SSBs (or TRSs) described above, QCL parameters of typeA or typeC of the SSBs (or TRSs) may be obtained.

Specifically, the QCL parameter of typeA obtained by the terminal device may be understood that the terminal device obtains average delay information, doppler shift information, delay spread information and doppler spread information of the antenna port corresponding to the reference signal. The QCL parameter of typeC obtained by the terminal device may be understood as average delay information and doppler shift information of the antenna port corresponding to the reference signal obtained by the terminal device. The fact that the terminal equipment obtains the average time delay information can be understood that the terminal equipment completes time domain synchronization with the corresponding antenna port; the terminal device obtaining the doppler shift information can be understood as that the terminal device completes frequency domain synchronization with the corresponding antenna port.

Further, the network device may send a first reference signal to the terminal device according to the first configuration information, and the method flow shown in fig. 5 further includes:

s521, the network device sends one or more first reference signals to the terminal device, or the terminal device receives one or more first reference signals from the network device.

The network device may transmit a plurality of one or more first reference signals to the terminal according to the configuration in S510.

For each first reference signal, the transmission beam/space transmission parameter used by the network device may be the same as the transmission beam/space transmission parameter of the SSB (or TRS) having a QCL relationship with the first reference signal, or the transmission beam/space transmission parameter of the SSB (or TRS) having a QCL relationship with the first reference signal may be similar, so that the first reference signal and the SSB (or TRS) may be guaranteed to have a typeD QCL relationship and a type a QCL relationship.

Further, the terminal device reports the channel state information to the network device, and the method flow shown in fig. 5 further includes:

s520, the terminal device sends the first information to the network device, or the network device receives the first information from the terminal device.

The first information comprises channel state information of at least one second reference signal, which is part or all of the one or more first reference signals, or which belongs to the one or more first reference signals, or which comprises the at least one second reference signal. Specifically, the terminal device reports the result of the beam measurement, and the first information (may be referred to as a measurement report) includes an identifier of a reference signal used for the beam measurement and a corresponding RSRP quantized value.

In this embodiment, the first information further includes first indication information, where the first indication information is used to indicate whether the terminal device stores the quasi co-located QCL parameter (for convenience of distinction, may be referred to as a first QCL parameter) of the at least one second reference signal.

Illustratively, the above first indication information indicates whether the terminal device stores the first QCL parameter of the at least one second reference signal, and one possible implementation manner is: the first indication information indicates whether the terminal device stores the second QCL parameters of at least one third reference signal of the at least one second reference signal.

And under the condition that the first indication information indicates that the terminal equipment stores the second QCL parameters of at least one third reference signal in the at least one second reference signal, the first information also comprises the identification of the at least one third reference signal.

Further, the network device may further instruct the terminal device to report the type of the second QCL parameter through the third indication information, and the method flow shown in fig. 5 further includes:

s522, the network device sends the third indication information to the terminal device, or the terminal device receives the third indication information from the network device.

The third indication information is used for indicating the terminal equipment to report the type of the second QCL parameter,

the first information further includes indication information indicating a type of the second QCL parameter of the at least one third reference signal acquired by the terminal device, for example, the first information further includes fourth indication information, where the fourth indication information is used to indicate the type of the second QCL parameter of the at least one third reference signal.

Optionally, the types of the second QCL parameters reported by the terminal device include: type a or type C. In addition, the type of the second QCL parameter reported by the alternative terminal device may report the type of the QCL parameter indirectly by reporting a certain type of QCL parameter. For example, the terminal device may report the a type by reporting a second QCL parameter (or referred to as typeA QCL parameter, etc.) of the a type; alternatively, for example, the terminal device may report the C type of the second QCL parameter by reporting the QCL parameter of the C type (or typeC QCL parameter, etc.).

Optionally, the third indication information is carried in the first configuration information.

Optionally, for one NZP-CSI-RS, the terminal device may additionally indicate to the network device whether the terminal device is provided with a typeA QCL parameter or a typeC QCL parameter of the NZP-CSI-RS. Wherein the typeA QCL parameter may be obtained by the terminal device through SSB (or TRS) having a typeA QCL relationship with the NZP-CSI-RS; or the typeC QCL parameter may be obtained by the terminal device through an SSB (or TRS) having a typeC QCL relation with the NZP-CSI-RS.

For ease of understanding, how the terminal device is instructed to maintain the second QCL parameters of the at least one third reference signal, and the second QCL parameter type, is described in connection with specific examples.

For example, the NZP-CSI-RS and 3 TRSs configured for the terminal device for 3 beam training have typeA QCL relationship, typeD QCL relationship, or indirect QCL relationship, respectively. If the terminal device has received TRS1 and TRS2 and recorded QCL parameters of TRS1 and TRS2, the terminal device may also report to the network device that the terminal device has measured QCL parameters of the antenna port corresponding to NZP-CSI-RS1 if the index and RSRP are reported. The typeA QCL parameter or typeC QCL parameter measured by the terminal equipment can be further reported to the network equipment. Optionally, the terminal device may also report to the network device that the terminal device does not measure the QCL parameter of TRS3, or does not perform any indication.

As a possible implementation manner, in a case where the network device determines that a new TCI state needs to be activated, the method flow shown in fig. 5 further includes:

s530, the network device sends the second instruction information to the terminal device, or the terminal device receives the second instruction information from the network device.

The second indication information is used to indicate that the TCI-state is activated, and for example, the second indication information includes MAC CE or DCI. It should be understood that the specific form of the second indication information is not limited in this application, and the information that can be used to indicate that the TCI-state is activated is within the scope of protection of this application.

When the fourth reference signal corresponding to the TCI-state meets a first condition, the effective moment of the TCI-state is the first moment; and when the fourth reference signal corresponding to the TCI-state does not meet the first condition, the effective moment of the TCI-state is the second moment.

The reference signal corresponding to the TCI-state may be understood as a first reference signal included in the TCI-state, or a second reference signal included in the TCI-state, or any one of the reference signals included in the TCI-state.

The first condition includes the fourth reference signal being one of the at least one third reference signal; or the fourth reference signal and one of the at least one third reference signal satisfy the QCL relationship, wherein satisfying the QCL relationship may be having a direct QCL relationship or having an indirect QCL relationship.

The third reference signal is a reference signal reported by the terminal device, and the terminal device reports the typeA QCL parameter or typeC QCL parameter of the third reference signal when reporting the related measurement value of the third reference signal.

Illustratively, in determining the time of TCI-state validation, the following conditions are also required to be met: the duration of the third time interval and the fourth time interval is smaller than or equal to a first threshold, wherein the third time interval is the time when the terminal equipment receives the second indication information or the time when the terminal equipment replies the ACK to the second indication information, and the fourth time interval is the time when the terminal equipment sends the first information or the time when the network equipment replies the ACK to the first information.

The first threshold may be predefined for a protocol, or may be determined by negotiating between the terminal device and the network device, and the value and the determining manner of the first threshold are not limited in the present application.

Illustratively, the first time is a time when a first time period (e.g., 3 ms) starts to pass at a time when the second indication information is received (or when the terminal device replies to the second indication information with an ACK), and the second time period is a time when a second time period (e.g., 20 ms) starts to pass at a time when the second indication information is received (or when the terminal device replies to the second indication information with an ACK), where the second time period is greater than or equal to a sum of the first time period, a time period for waiting for a synchronization signal block SSB or a tracking reference signal TRS, and a third time period. Wherein one of the SSB or TRS and TCI state (e.g., the fourth reference signal) has a QCL relationship of typeA or typeC; or one of the reference signals in SSB or TRS and TCI state has an indirect QCL relationship of typeA or typeC. Alternatively, the first duration and the second duration may be configured or preconfigured. The third duration may be a duration for processing the SSB or TRS.

For ease of understanding, the relationship between the first time and the second time is described in connection with fig. 6, and fig. 6 is a schematic diagram of the first time and the second time provided in the present application.

As can be seen from fig. 6, the first time is a time of a first time period (e.g. 3 ms) after the time of the terminal device replying with an ACK to the second indication information; the second time is a time of a first time period (e.g., 20 ms) after the time of the terminal device replying with the ACK to the second indication information.

It should be understood that fig. 6 is only an example, and does not limit the scope of the present application in any way.

In the case where the effective time of the TCI-state is the first time, the time waiting for the reference signal for synchronization after activating the new TCI-state can be reduced.

As one possible implementation manner, the fourth reference signal and one third reference signal of the at least one third reference signal satisfy the QCL relationship as follows: the fourth reference signal and one of the at least one third reference signal satisfy an a-type QCL relationship, wherein the a-type QCL relationship includes that a channel experienced by an antenna port transmitting the fourth reference signal and a channel experienced by an antenna port transmitting the third reference signal share a common relation: doppler shift, doppler spread, average delay, delay spread.

Under the implementation manner, it can be understood that the terminal device can use the TCI-state at the first moment when the a-type QCL parameter of the fourth reference signal is obtained, and since the a-type QCL parameter contains a channel large-scale characteristic more than the C-type QCL parameter, when the terminal device has the a-type QCL parameter, channel estimation can be more accurately performed, and the reliability of the terminal device for transmitting data using the new TCI-state is improved.

The method flow illustrated in fig. 5 illustrates that the terminal device may inform the network device through the channel measurement report reporting flow: whether the terminal device stores QCL parameters of some reference signals, it should be understood that the terminal device may report in other manners, for example, before or after the network device activates a new TCI-state, the terminal device may report the QCL parameters stored with some reference signals to the network device through a new message, notify the network device of the reference signals monitored by the terminal device through separate signaling, and the CSI-RS reporting decoupling improves flexibility of signaling interaction, which is described below in connection with fig. 7.

Fig. 7 is a schematic flow chart of another communication method provided in the present application, including the steps of:

S710, the terminal equipment acquires a second QCL parameter of at least one third reference signal.

Optionally, the third reference signal monitors and records SSB (or TRS) of the second QCL parameter for the terminal device.

It can be understood that, after the terminal device receives the SSB (or TRS), the QCL parameter of typeA or typeC of the SSB (or TRS) can be obtained, and step S710 described above can be understood as: the network device sends the SSB (or TRS) to the terminal device, and the terminal device may acquire the second QCL parameter of the at least one third reference signal after receiving the SSB (or TRS).

In this embodiment, the terminal device may report, to the network device, the second QCL parameter stored with at least one third reference signal through the first information, where the method flow shown in fig. 7 further includes:

s720, the terminal device sends the first information to the network device, or the network device receives the first information from the terminal device.

The first information includes an identifier of the at least one third reference signal, and the first information is used for indicating the terminal equipment to store the second QCL parameter of the at least one third reference signal.

As a possible implementation manner, the reporting of the first information by the terminal device may be performed in parallel with the reporting process of the channel state measurement report.

As another possible implementation manner, the reporting of the first information by the terminal device may be independent of the reporting procedure of the channel state measurement report.

For example, the terminal device predicts which beams become new beams with a high probability according to the history information, so synchronization can be completed with corresponding SSBs or TRSs in the beam directions in advance, and indexes of the SSBs and TRSs are reported to the network device.

As a further possible implementation manner, the reporting of the first information by the terminal device may also be performed based on a reporting result of the channel state measurement report.

For example, after the terminal device reports a plurality of reference signals with higher RSRP, the terminal device may track TRSs and SSBs having QCL relations with the reference signals in advance, and then report indexes of the TRSs and SSBs to the network device, so that synchronization of the terminal device in the beam directions can be started in advance, instead of waiting until the terminal device starts synchronization after the beams are activated through TCI-state.

In addition, the reporting action of the first information may be periodic or aperiodic. Meanwhile, when the terminal equipment does not track certain reference signals, namely does not maintain the synchronization in certain beam directions, the terminal equipment can report the information to the network equipment, and the network equipment is informed that the synchronization information in the beam directions is not maintained.

Further, the network device may further instruct the terminal device to report the type of the second QCL parameter through the third indication information, and the method flow shown in fig. 7 further includes:

s721, the network device sends the third indication information to the terminal device, or the terminal device receives the third indication information from the network device.

Reference may be made to the description of S522 in fig. 5 above, and no further description is given here.

As a possible implementation manner, in a case where the network device determines that a new TCI state needs to be activated, the method flow shown in fig. 7 further includes:

s730, the network device sends the second instruction information to the terminal device, or the terminal device receives the second instruction information from the network device.

The second indication information is used to indicate that the TCI-state is activated, for example, the second indication information is MAC CE or DCI. It should be understood that the specific form of the second indication information is not limited in this application, and the information that can be used to indicate that the TCI-state is activated is within the scope of protection of this application.

Illustratively, determining the TCI-state validation time according to the precedence relationship of step S730 and step S720 includes the following two possibilities:

one possible way is: step S720 is performed before step S730.

When the fourth reference signal corresponding to the TCI-state possibly meets the first condition, the effective moment of the TCI-state is the first moment; and when the fourth reference signal corresponding to the TCI-state does not meet the first condition, the effective moment of the TCI-state is the second moment.

From the above, the third reference signal is a reference signal reported by the terminal device, and the terminal device reports, through the first indication information, the second QCL parameter of the terminal device with the third reference signal, and further reports, through the fourth indication information, the type of the second QCL parameter. For example, the type of the second QCL parameter reported includes a type a or a type C; when the type of the second QCL parameter reported includes a type a, it may be understood that the terminal device is provided with a typeA QCL parameter of the third reference signal; when the type of the second QCL parameter reported includes the C type, it may be understood that the terminal device is provided with the typeC QCL parameter of the third reference signal.

Specifically, the definition of the first time and the second time may refer to the description about the first time and the second time in step S530 in fig. 5, which is not repeated herein.

For example, the duration of the third time interval and the fourth time interval is less than or equal to the first threshold, and specifically, the definition of the third time interval and the fourth time interval may refer to the description of the third time interval and the fourth time interval in step S530 in fig. 5, which is not repeated herein.

Two possibilities are: step S720 described above is performed after step S730.

That is, the terminal device does not report the reference signal storing the QCL parameter before receiving the second indication information for activating the TCI-state, but reports the QCL parameter storing the fourth reference signal corresponding to the TCI-state after receiving the second indication information, which can be understood as: when the at least one third reference signal includes a fourth reference signal corresponding to the TCI-state, the time of validity of the TCI-state is a time of a first duration after the first information is sent (or an ACK for the first information is received by the network device).

Possibly, the second lower terminal device directly indicates the fourth reference signal QCL parameter condition corresponding to the TCI-state to be activated to the network device, and the rule and the corresponding relation are simpler.

It should be understood that the sequence numbers of the above processes do not mean the order of execution, and the execution order of the processes should be determined by the functions and internal logic of the processes, and should not constitute any limitation on the implementation process of the embodiments of the present application.

It is also to be understood that in the various embodiments of the application, terms and/or descriptions of the various embodiments are consistent and may be referenced to one another in the absence of a particular explanation or logic conflict, and that the features of the various embodiments may be combined to form new embodiments in accordance with their inherent logic relationships.

It should also be understood that in some of the above embodiments, the devices in the existing network architecture are mainly used as examples for the explanation (such as network devices, terminal devices, etc.), and it should be understood that the embodiments of the present application are not limited to specific forms of the devices. For example, devices that can achieve the same functionality in the future are suitable for use in the embodiments of the present application.

It will be appreciated that in the foregoing embodiments of the methods and operations implemented by a device (e.g., a network device, a terminal device) may also be implemented by a component (e.g., a chip or circuit) of the device.

The communication method provided in the embodiment of the present application is described in detail above with reference to fig. 5 and 7. The above communication method is mainly described in terms of interaction between the network device and the terminal device. It will be appreciated that the network device and the terminal device, in order to implement the above-mentioned functions, comprise corresponding hardware structures and/or software modules for performing the respective functions.

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

The communication device provided in the present application is described in detail below with reference to fig. 8 to 11. It should be understood that the descriptions of the apparatus embodiments and the descriptions of the method embodiments correspond to each other, and thus, descriptions of details not shown may be referred to the above method embodiments, and for the sake of brevity, some parts of the descriptions are omitted.

The embodiment of the application may divide the function modules of the transmitting end device or the receiving end device according to the above method example, for example, each function module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated modules may be implemented in hardware or in software functional modules. It should be noted that, in the embodiment of the present application, the division of the modules is schematic, which is merely a logic function division, and other division manners may be implemented in actual implementation. The following description will take an example of dividing each functional module into corresponding functions.

Referring to fig. 8, fig. 8 is a schematic diagram of a communication device provided in the present application. As shown in fig. 8, the apparatus 800 includes a receiving unit 810, a transmitting unit 820, and a processing unit 830.

As an example, the receiving unit 810 is configured to receive first configuration information from a network device, where the first configuration information is used to instruct the terminal device to report channel state information, and the first configuration information includes an identifier of one or more first reference signals;

a transmitting unit 820 for transmitting first information to the network device, the first information including channel state information of at least one second reference signal, the at least one second reference signal being part or all of the one or more first reference signals,

the first information includes first indication information for indicating whether the communication device maintains a first quasi co-sited QCL parameter of the at least one second reference signal.

As another example, the processing unit 830 is configured to obtain a second quasi co-sited QCL parameter of at least one third reference signal;

a sending unit 820, configured to send first information to the network device, where the first information includes an identifier of the at least one third reference signal, and the first information is used to instruct the terminal device to store a second QCL parameter of the at least one third reference signal.

The apparatus 800 corresponds to a terminal device in a method embodiment, and the apparatus 800 may be a terminal device in a method embodiment, or a chip or a functional module inside a terminal device in a method embodiment. The respective units of the apparatus 800 are adapted to perform the respective steps performed by the terminal device in the method embodiments shown in fig. 5 and 7.

The processing unit 830 in the apparatus 800 is configured to perform steps corresponding to the processing related to the terminal device in the method embodiment. For example, step S710 in fig. 7 is performed.

The receiving unit 810 in the apparatus 800 is configured to perform a terminal device receiving step in a method embodiment. For example, steps S511, S510, S521, S522, and S530 in fig. 5 are performed, or step S721 in fig. 7 is performed.

A sending unit 820 in the apparatus 800 is configured to perform a step of sending by the terminal device in the method embodiment. For example, step S520 of fig. 5, or step S720 in fig. 7 is performed.

Wherein the processing unit 830 may be at least one processor. The transmitting unit 820 may be a transmitter or an interface circuit, and the receiving unit 810 may be a receiver or an interface circuit. The receiver and transmitter may be integrated together to form a transceiver or interface circuit.

Optionally, the apparatus 800 may further comprise a storage unit for storing data and/or signaling, and the processing unit 830, the sending unit 820, and the receiving unit 810 may interact or be coupled with the storage unit, e.g. read or invoke the data and/or signaling in the storage unit, so that the methods of the above embodiments are performed.

The above units may exist independently or may be integrated in whole or in part.

Referring to fig. 9, fig. 9 is a schematic structural diagram of a terminal device of the present application. The terminal device 900 may be applied to the system shown in fig. 1. For convenience of explanation, fig. 9 shows only major components of the terminal device. As shown in fig. 9, the terminal device 900 includes a processor, a memory, a control circuit, an antenna, and an input-output device. The processor is used for controlling the antenna and the input-output device to send and receive signals, the memory is used for storing a computer program, and the processor is used for calling and running the computer program from the memory so as to execute corresponding processes and/or operations executed by the terminal equipment in the method for registering. And will not be described in detail herein.

Those skilled in the art will appreciate that fig. 9 shows only one memory and processor for ease of illustration. In an actual terminal device, there may be multiple processors and memories. The memory may also be referred to as a storage medium or storage device, etc., and embodiments of the present application are not limited in this regard.

Referring to fig. 10, fig. 10 is a schematic diagram of another communication device provided in the present application. As shown in fig. 10, the apparatus 1000 includes a receiving unit 1010, a transmitting unit 1020, and a processing unit 1030.

As an example, the sending unit 1020 is configured to send first configuration information to a terminal device, where the first configuration information is used to instruct the terminal device to report channel state information, and the first configuration information includes one or more identifiers of first reference signals;

a receiving unit 1010, configured to receive first information from the terminal device, where the first information includes channel state information of at least one second reference signal, and the at least one second reference signal is part or all of the one or more first reference signals,

the first information includes first indication information. The first indication information is used for indicating whether the terminal equipment stores a first quasi co-located QCL parameter of the at least one second reference signal.

As another example, the receiving unit 1010 is configured to receive first information from a terminal device, where the first information includes an identifier of the at least one third reference signal, and the first information is used to instruct the terminal device to store a second quasi co-sited QCL parameter of the at least one third reference signal;

A processing unit 1030 is configured to determine a second QCL parameter of the terminal device that stores the at least one third reference signal.

Apparatus 1000 corresponds to a network device in a method embodiment, and apparatus 1000 may be a network device in a method embodiment, or a chip or a functional module inside a network device in a method embodiment. The respective units of the apparatus 1000 are adapted to perform the respective steps performed by the network device in the method embodiments shown in fig. 5 and 7.

The processing unit 1030 in the apparatus 1000 is configured to perform steps corresponding to processing within a network device in a method embodiment. A transmitting unit 1020 in the apparatus 1000 is configured to perform the steps related to the network device transmission. For example, steps S511, S510, S521, S522, and S530 in fig. 5 are performed, or step S721 in fig. 7 is performed.

The receiving unit 1010 in the apparatus 1000 is configured to perform a receiving step of the network device in the method embodiment. For example, step S520 of fig. 5, or step S720 in fig. 7 is performed.

The receiving unit 1010 and the transmitting unit 1020 may constitute a transceiving unit, and have both receiving and transmitting functions. The processing unit 1030 may be at least one processor. The transmitting unit may be a transmitter or an interface circuit. The receiving unit may be a receiver or an interface circuit. The receiver and transmitter may be integrated together to form a transceiver or interface circuit.

Optionally, the apparatus 1000 may further comprise a storage unit for storing data and/or signaling, and the processing unit 1030, the transmitting unit 1020, and the receiving unit 1010 may interact or be coupled with the storage unit, e.g. read or invoke data and/or signaling in the storage unit, so that the method of the above embodiments is performed.

Referring to fig. 11, fig. 11 is a schematic structural diagram of a network device of the present application, which may be used to implement the functions of the network device in the above-described communication method.

In a possible manner, for example, in some implementations in a 5G communication system, the network device 1100 may include a CU, a DU and an AAU, where a non-real-time portion of the original BBU is split, redefined as a CU, compared to an access network device in an LTE communication system, by one or more radio frequency units, such as a remote radio frequency unit (remote radio unit, RRU) 11010 and one or more baseband units (BBU), where a portion of the physical layer processing functions responsible for processing non-real-time protocols and services and BBU are combined with the original RRU and passive antennas as an AAU, and the remaining functions of the BBU are redefined as DUs, responsible for processing physical layer protocols and real-time services. In short, CUs and DUs differentiate in real-time of the processing content, AAU is a combination of RRU and antenna.

CU, DU, AAU may be provided separately or together, so that multiple network deployment configurations may occur, where one possible deployment configuration is consistent with a conventional 4G access network device, where a CU and DU are co-hardware deployed. It should be understood that fig. 11 is only an example, and the scope of protection of the present application is not limited, and for example, the deployment mode may be that the DUs are deployed in a 5G BBU room, a CU centralized deployment or a DU centralized deployment, a CU higher level set, or the like.

The AAU 1101 may implement a transceiving function called a transceiving unit. Alternatively, the transceiver unit may also be referred to as a transceiver, a transceiver circuit, or a transceiver, etc., which may include at least one antenna 11011 and a radio frequency unit 11010. Alternatively, the transceiver unit may include a receiving unit, which may correspond to a receiver (or receiver, receiving circuit), and a transmitting unit, which may correspond to a transmitter (or transmitter, transmitting circuit). The CU and DU 1102 may implement internal processing functions called processing units. Alternatively, the processing unit may control the access network device, etc., and may be referred to as a controller. The AAU 1101 may be physically located together with the CU and the DU 1102, or may be physically separate.

The access network device is not limited to the configuration shown in fig. 11, and may be other configurations: for example: including BBU and ARU, or including BBU and AAU; the present invention is not limited to this application, and CPE may be used.

It should be appreciated that the network device 1100 shown in fig. 11 is capable of implementing the network devices involved in the method embodiments of fig. 5 and 7. The operations and/or functions of the various units in the network device 1100 are respectively for implementing the corresponding procedures performed by the network device in the method embodiments of the present application. To avoid repetition, detailed descriptions are omitted here as appropriate. The architecture of the network device illustrated in fig. 11 is only one possible configuration and should not be construed as limiting the embodiments herein. The present application does not exclude the possibility of other forms of network device architecture that may occur in the future.

The embodiment of the application also provides a communication system which comprises the terminal equipment and the network equipment.

The present application also provides a computer readable storage medium having instructions stored therein, which when run on a computer, cause the computer to perform the steps performed by the terminal device in the methods shown in fig. 5 and 7 described above.

The present application also provides a computer readable storage medium having instructions stored therein which, when executed on a computer, cause the computer to perform the steps described above as being performed by a network device in the method shown in fig. 5 and 7.

The present application also provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform the steps performed by a terminal device in the method as shown in fig. 5 and 7.

The present application also provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform the steps performed by a network device in the method shown in fig. 5 and 7.

The application also provides a chip comprising a processor. The processor is configured to read and execute the computer program stored in the memory to perform the corresponding operations and/or procedures performed by the terminal device in the communication method provided in the present application. Optionally, the chip further comprises a memory, the memory is connected with the processor through a circuit or a wire, and the processor is used for reading and executing the computer program in the memory. Further optionally, the chip further comprises a communication interface, and the processor is connected to the communication interface. The communication interface is used for receiving the processed data and/or information, and the processor acquires the data and/or information from the communication interface and processes the data and/or information. The communication interface may be an input/output interface, interface circuitry, output circuitry, input circuitry, pins, or related circuitry, etc. on the chip. The processor may also be embodied as processing circuitry or logic circuitry.

The application also provides a chip comprising a processor. The processor is configured to read and execute the computer program stored in the memory to perform the corresponding operations and/or flows performed by the network device in the communication method provided in the present application. Optionally, the chip further comprises a memory, the memory is connected with the processor through a circuit or a wire, and the processor is used for reading and executing the computer program in the memory. Further optionally, the chip further comprises a communication interface, and the processor is connected to the communication interface. The communication interface is used for receiving the processed data and/or information, and the processor acquires the data and/or information from the communication interface and processes the data and/or information. The communication interface may be an input/output interface, interface circuitry, output circuitry, input circuitry, pins, or related circuitry, etc. on the chip. The processor may also be embodied as processing circuitry or logic circuitry.

The chip may be replaced by a chip system, and will not be described herein.

The terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed or inherent to such process, method, article, or apparatus.

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

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

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

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. The object of the present embodiment can be achieved by actually selecting some or all of the units therein.

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

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a read-only memory (ROM), a random access memory (random access memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

In addition, the term "and/or" in this application is merely an association relationship describing an association object, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship; the term "at least one" in this application may mean "one" and "two or more", for example, at least one of A, B and C may mean: the seven cases are that A alone, B alone, C alone, A and B together, A and C together, C and B together, A and B together, and C together.

The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method of communication, comprising:

the method comprises the steps that a terminal device receives first configuration information from a network device, wherein the first configuration information is used for indicating the terminal device to report channel state information, and the first configuration information comprises one or more identifiers of first reference signals;

The terminal equipment sends first information to the network equipment, wherein the first information comprises channel state information of at least one second reference signal, and the at least one second reference signal is part or all of the one or more first reference signals;

the first information includes first indication information, where the first indication information is used to indicate whether the terminal device stores a first quasi co-sited QCL parameter of the at least one second reference signal.

2. The method according to claim 1, wherein the method further comprises:

the terminal device receives the one or more first reference signals from the network device.

3. The method according to claim 1 or 2, wherein the first indication information indicates whether the terminal device holds the first QCL parameter of the at least one second reference signal, comprising:

the first indication information indicates whether the terminal device stores second QCL parameters of at least one third reference signal of the at least one second reference signal,

in case the first indication information indicates that the terminal device holds the second QCL parameters of at least one third reference signal of the at least one second reference signal,

The first information further includes an identification of the at least one third reference signal.

4. A method according to any of claims 1-3, characterized in that any of the at least one third reference signal satisfies the QCL relation with the synchronization signal block SSB or tracking reference signal TRS.

5. A method of communication, comprising:

the terminal equipment acquires a second quasi co-located QCL parameter of at least one third reference signal;

the terminal device sends first information to the network device, where the first information includes an identifier of the at least one third reference signal, and the first information is used to instruct the terminal device to store a second QCL parameter of the at least one third reference signal.

6. The method of claim 5, wherein any one of the at least one third reference signal is a synchronization signal block SSB or a tracking reference signal TRS, or wherein any one of the at least one third reference signal satisfies a QCL relationship with the synchronization signal block SSB or the tracking reference signal TRS.

7. The method according to claim 5 or 6, characterized in that the method further comprises:

The terminal device receives second indication information from the network device, the second indication information is used for indicating to activate a transmission configuration indication state TCI-state,

when the at least one third reference signal includes a fourth reference signal corresponding to the TCI-state, the effective time of the TCI-state is a time after the first information is sent.

8. The method according to any one of claims 3 to 7, further comprising:

the terminal equipment receives second indication information from the network equipment, wherein the second indication information is used for indicating an activated transmission configuration indication state TCI-state;

when the fourth reference signal corresponding to the TCI-state meets a first condition, the effective moment of the TCI-state is the first moment;

when the fourth reference signal corresponding to the TCI-state does not meet the first condition, the effective moment of the TCI-state is the second moment;

the first condition includes the fourth reference signal being one of the at least one third reference signal, or the fourth reference signal and one of the at least one third reference signal satisfying a QCL relationship,

Wherein the first time is earlier than the second time.

9. The method of claim 8, wherein the first time is a time when a first time period has elapsed since a time when the second indication information was received, and the second time is a time when a second time period has elapsed since a time when the second indication information was received, the second time period being greater than or equal to a sum of the first time period, a time period for waiting for a synchronization signal block SSB or a tracking reference signal TRS, and a time period for processing the SSB or TRS.

10. The method according to claim 8 or 9, wherein one of the fourth reference signal and the at least one third reference signal satisfies a QCL relationship, comprising:

the fourth reference signal and one of the at least one third reference signal satisfy an a-type QCL relationship, wherein the a-type QCL relationship includes that a channel experienced by an antenna port transmitting the fourth reference signal and a channel experienced by an antenna port transmitting the third reference signal share a common relation: doppler shift, doppler spread, average delay and delay spread.

11. The method according to any one of claims 8 to 10, wherein the duration of the third time instant and the fourth time instant interval is less than or equal to a first threshold value,

the third time is the time when the terminal device receives the second indication information, and the fourth time is the time when the terminal device sends the first information.

12. The method according to any one of claims 3 to 10, further comprising:

the terminal equipment receives third indication information from the network equipment, wherein the third indication information is used for indicating the terminal equipment to report the type of the second QCL parameter,

the first information further includes fourth indication information, where the fourth indication information is used to indicate a type of the second QCL parameter of the at least one third reference signal acquired by the terminal device.

13. The method of claim 12, wherein the type of the second QCL parameter reported comprises a type a or a type C.

14. A method of communication, comprising:

the network equipment sends first configuration information to the terminal equipment, wherein the first configuration information is used for indicating the terminal equipment to report channel state information, and the first configuration information comprises one or more identifiers of first reference signals;

The network device receives first information from the terminal device, wherein the first information comprises channel state information of at least one second reference signal, and the at least one second reference signal is part or all of the one or more first reference signals;

15. The method of claim 14, wherein the method further comprises:

the network device sends the one or more first reference signals to the terminal device.

16. The method of claim 15, wherein the first indication information indicates whether the terminal device maintains the first QCL parameters of the at least one second reference signal, comprising:

17. The method according to any of claims 14 to 16, wherein any of the at least one third reference signal satisfies a QCL relationship with either a synchronization signal block SSB or a tracking reference signal TRS.

18. A method of communication, comprising:

the network equipment receives first information from the terminal equipment, wherein the first information comprises an identifier of the at least one third reference signal, and the first information is used for indicating the terminal equipment to store a second quasi co-located QCL parameter of the at least one third reference signal;

the network device determines a second QCL parameter of the terminal device storing the at least one third reference signal.

19. The method of claim 18, wherein any one of the at least one third reference signal is a synchronization signal block SSB or a tracking reference signal TRS, or wherein any one of the at least one third reference signal satisfies a QCL relationship with the synchronization signal block SSB or the tracking reference signal TRS.

20. The method according to claim 18 or 19, characterized in that the method further comprises:

The network device sends second indication information to the terminal device, the second indication information is used for indicating the activated transmission configuration indication state TCI-state,

21. The method according to any one of claims 16 to 20, further comprising:

the network equipment sends second indication information to the terminal equipment, wherein the second indication information is used for indicating an activated transmission configuration indication state TCI-state;

wherein the first time is earlier than the second time.

22. The method of claim 21, wherein the first time is a time when a first time period has elapsed since a time when the second indication information was received, and wherein the second time period is a time when a second time period has elapsed since a time when the second indication information was received, and wherein the second time period is greater than or equal to a sum of the first time period, a time period for waiting for a synchronization signal block SSB or a tracking reference signal TRS, and a time period for processing the SSB or TRS.

23. The method of claim 21 or 22, wherein the fourth reference signal and one of the at least one third reference signal satisfy a QCL relationship, comprising:

24. The method according to any one of claims 21 to 23, wherein the duration of the third time instant and the fourth time instant interval is less than or equal to a first threshold value,

The third time is the time when the terminal device receives the third indication information, and the fourth time is the time when the terminal device sends the first information.

25. The method according to any one of claims 16 to 24, further comprising:

the network device sends third indication information to the terminal device, the third indication information is used for indicating the terminal device to report the type of the second QCL parameter,

26. The method of claim 25, wherein the type of the second QCL parameter reported comprises a type a or a type C.

27. A communication system comprising a terminal device for performing the method of any one of claims 1 to 13 and a network device for performing the method of any one of claims 14 to 26.

28. A computer readable storage medium storing computer instructions which, when run on a terminal device, cause the terminal device to perform the method of any one of claims 1 to 26.

29. A computer program product comprising instructions which, when run on a network device, cause the network device to perform the method of any one of claims 1 to 26.