CN112020889B - Communication method and device - Google Patents

Abstract

A method and apparatus for communication, wherein the method comprises: receiving a first reference signal and performing time-frequency offset compensation on the first reference signal; in the embodiment of the present application, on the one hand, the time-frequency offset compensation value used for performing time-frequency offset compensation on the first reference signal is configured before the first reference signal is received, so that the first reference signal is compensated based on the configured time-frequency offset compensation value, and the problem that the time-frequency offset estimation value calculated based on the compensated first reference signal is inaccurate due to unreasonable configuration time of the time-frequency offset compensation value is avoided, on the other hand, the first reference signal is the reference signal using the time-frequency offset compensation value for the first time, and because the time-frequency offset compensation value is configured before the second reference signal using the time-frequency offset compensation value for the first time is received, the subsequent reference signals can be compensated based on the time-frequency offset compensation value, so that the accuracy of the time-frequency offset estimation value calculated based on the compensated subsequent reference signal is effectively ensured.

Description

A communication method and device

Technical Field

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

Background technique

The 5th generation (5G) communication system will use higher carrier frequencies (generally, greater than 6GHz), such as 28GHz, 38GHz, or 72GHz bands, to achieve wireless communications with larger bandwidth and higher transmission rates. Due to the high carrier frequency, the wireless signal it transmits experiences more severe fading during spatial propagation, and it is even difficult to detect the wireless signal at the receiving end. To this end, beamforming (BF) technology will be used in 5G systems to obtain gain with good directivity, increase the power in the transmitting direction, and improve the signal to interference plus noise ratio (SINR) at the receiving end.

By adopting beamforming technology, the transmitting device and the receiving device can communicate on different beams. Since the coverage direction and coverage range of different beams may be different, such as beam 1, beam 2 and beam 3 shown in Figure 1a, the coverage direction and coverage range of beam 1, beam 2 and beam 3 are different, which leads to differences in the large-scale parameter characteristic parameters (such as average delay and Doppler shift) of the signals transmitted on beam 1, beam 2 and beam 3. Among them, if there is a difference in the average delay of the signals transmitted on beam 1, beam 2 and beam 3, time offset may be caused; if there is a difference in the Doppler shift of the signals transmitted on beam 1, beam 2 and beam 3, frequency offset may be caused. Time offset and frequency offset (referred to as time-frequency offset) will cause the receiving device to be unable to correctly analyze the received signal. To solve this problem, it is necessary to use time-frequency offset compensation values to perform corresponding time-frequency offset compensation on the signals transmitted on different beams. However, since the time-frequency offset compensation value changes dynamically, how to configure the time-frequency offset compensation value still needs further research.

Summary of the invention

The purpose of the embodiments of the present application is to provide a communication method and apparatus for solving the technical problem that the configuration time of the time-frequency offset compensation value is unreasonable, resulting in inaccurate time-frequency offset estimation results.

In a first aspect, an embodiment of the present application provides a communication method, the method comprising:

Receiving a first reference signal; performing time-frequency offset compensation on the first reference signal;

The time-frequency offset compensation value used to perform time-frequency offset compensation on the first reference signal is configured before receiving the first reference signal, and the first reference signal is a reference signal that uses the time-frequency offset compensation value for the first time.

By adopting the above method, on the one hand, since the time-frequency offset compensation value used for time-frequency offset compensation of the first reference signal is configured before receiving the first reference signal, the first reference signal is compensated based on the configured time-frequency offset compensation value, thereby avoiding the problem of inaccurate time-frequency offset estimation value calculated based on the compensated first reference signal due to unreasonable configuration time of the time-frequency offset compensation value. On the other hand, the first reference signal is a reference signal that uses the time-frequency offset compensation value for the first time. Since the time-frequency offset compensation value is configured before receiving the first reference signal that uses the time-frequency offset compensation value for the first time, subsequent reference signals can be compensated based on the time-frequency offset compensation value, thereby effectively ensuring the accuracy of the time-frequency offset estimation value calculated based on the compensated subsequent reference signals.

In one possible design, the time-frequency offset compensation value is configured at the beginning of the first time slot where the first reference signal is located.

In one possible design, the time-frequency offset compensation value is configured at the start time of a first time slot before a first time slot where the first reference signal is located.

In one possible design, the time slot where the second reference signal is located includes the first time slot and a second time slot, the second time slot is adjacent to the first time slot and is located before the first time slot; the second reference signal is a reference signal for time-frequency offset estimation; the method also includes: abandoning the use of the time-frequency offset compensation value to compensate the second reference signal for time-frequency offset.

With the above method, since the time-frequency offset compensation value is configured between the two time slots where the second reference signal is located, if the second reference signal is received and the time-frequency offset compensation is performed on the second reference signal, part of the second reference signal (located in the second time slot) is compensated using the time-frequency offset compensation value before configuration, and the other part of the signal (located in the first time slot) is compensated using the time-frequency offset compensation value before configuration, resulting in an inaccurate time-frequency offset estimation value calculated based on the compensated second reference signal. Therefore, a method provided in an embodiment of the present application is to abandon the use of the time-frequency offset compensation value to compensate the time-frequency offset of the second reference signal, or it can also be understood as abandoning the reception of the second reference signal in the second time slot and the first time slot, thereby avoiding problems that may be caused by inaccurate time-frequency offset estimation value. In this case, the specific processing method can refer to the description in the specific implementation method. Alternatively, in other possible situations, the second reference signal can also be received, but at this time, the signal located in the second time slot needs to be corrected, and the specific details can be referred to the description in the specific implementation method.

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

Receive configuration information of N reference signals for time-frequency offset estimation, where the configuration information of the N reference signals is used to indicate time domain resources where the multiple reference signals are located; the multiple reference signals include a first reference signal; further, according to the time domain resources where the multiple reference signals are located, configure, at a first moment, a time-frequency offset compensation value for performing time-frequency offset compensation on M reference signals among the N reference signals; M and N are both integers, and M is less than or equal to N;

There is no first reference signal among the M reference signals, and the first time is located between the start time and the end time of the time domain resource of the first reference signal.

In a possible design, the first reference signal exists in the N reference signals other than the M reference signals; the method further includes: abandoning the time-frequency offset estimation of the first reference signal. Abandoning the time-frequency offset estimation of the first reference signal can also be understood as abandoning the use of the above-mentioned time-frequency offset compensation value to compensate the time-frequency offset of the first reference signal, or abandoning the reception of the first reference signal.

In a third aspect, an embodiment of the present application provides a communication method, which is applied to a receiving device, and the method includes:

Receive a first reference signal sent by a transmitting end device; use an i-th time-frequency offset compensation value to perform time-frequency offset compensation on the first reference signal; calculate a first time-frequency offset estimation value of the first reference signal after time-frequency offset compensation according to the first reference signal after time-frequency offset compensation; if the first time-frequency offset estimation value is greater than a preset threshold, generate an i+1-th time-frequency offset compensation value according to the first time-frequency offset estimation value; update the i-th time-frequency offset compensation value to the i+1-th time-frequency offset compensation value according to a time unit where N reference signals are located, where i is a positive integer; the N reference signals are reference signals used for time-frequency offset estimation, the N reference signals include the first reference signal, and N is an integer greater than 1.

In the embodiment of the present application, since the time unit in which the N reference signals are located is fully considered when the i-th time-frequency offset compensation value is updated to the i+1-th time-frequency offset compensation value, the i-th time-frequency offset compensation value can be updated to the i+1-th time-frequency offset compensation value at an appropriate time.

In a possible design, updating the i-th time-frequency offset compensation value to the i+1-th time-frequency offset compensation value according to the time unit where the N reference signals are located includes: if it is determined that there is at least one candidate time within a set time period after the time when the i+1-th time-frequency offset compensation value is generated, updating the i-th time-frequency offset compensation value to the i+1-th time-frequency offset compensation value at the candidate time closest to the time when the i+1-th time-frequency offset compensation value is generated according to the time unit where the N reference signals are located;

Each of the at least one candidate time point meets the following conditions:

Located at the end position of the first time unit or the starting position of the second time unit; for each of the N reference signals, if the time unit where the reference signal is located includes the first time unit, the second time unit is not included, or, if the second time unit is included, the first time unit is not included.

In a possible design, the method further includes: according to the time units where the N reference signals are located, if it is determined that there is no alternative time that meets the condition within a set time period after the time when the i+1th time-frequency offset compensation value is generated, updating the i-th time-frequency offset compensation value to the i+1th time-frequency offset compensation value at a first time;

The first moment is the end position of the third time unit or the start position of the fourth time unit; the N reference signals include a second reference signal, and the time unit where the second reference signal is located includes the third time unit and the fourth time unit.

In one possible design, the method further includes:

Receiving the second reference signal in the third time unit and the fourth time unit is abandoned.

In one possible design, the method further includes:

receiving the second reference signal sent by the transmitting end device, where the second reference signal includes a first partial signal located in the third time unit and a second partial signal located in the fourth time unit;

Performing a first time-frequency offset compensation on the first portion of the signal using an i-th time-frequency offset compensation value, performing a second time-frequency offset compensation on the first portion of the signal after the first time-frequency offset compensation using a difference between the i+1-th time-frequency offset compensation value and the i-th time-frequency offset compensation value, and performing a time-frequency offset compensation on the second portion of the signal using the i+1-th time-frequency offset compensation value;

A second time-frequency offset estimation value is calculated based on the first part of the signal after the second time-frequency offset compensation and the second part of the signal after the time-frequency offset compensation.

In a possible design, after the calculation obtains the second time-frequency offset estimate, the method further includes:

Receiving a second target signal sent by the transmitting end device and having a QCL relationship with the second reference signal;

The second target signal is subjected to a first time-frequency offset compensation using the i+1th time-frequency offset compensation value, and the second time-frequency offset estimation value is used to perform a second time-frequency offset compensation on the second target signal after the first time-frequency offset compensation, thereby analyzing the second target signal after the second time-frequency offset compensation.

In a possible design, after the i-th time-frequency offset compensation value is updated to the (i+1)-th time-frequency offset compensation value, the method further includes:

Receive a first target signal having a QCL relationship with the first reference signal and sent by the transmitting end device; use the i+1th time-frequency offset compensation value to perform time-frequency offset compensation on the first target signal, and analyze the first target signal after time-frequency offset compensation.

In one possible design, the N reference signals also include a third reference signal;

After the i-th time-frequency offset compensation value is updated to the (i+1)-th time-frequency offset compensation value, the method further includes:

Receive a third reference signal sent by the transmitting end device; use the (i+1)th time-frequency offset compensation value to perform time-frequency offset compensation on the third reference signal, and calculate a third time-frequency offset estimation value of the third reference signal after the time-frequency offset compensation.

In a possible design, after calculating the third time-frequency offset estimate of the third reference signal after time-frequency offset compensation, the method further includes:

receiving a third target signal sent by the transmitting end device and having a QCL relationship with the third reference signal;

The third target signal is subjected to a first time-frequency offset compensation using the i+1th time-frequency offset compensation value, and the third time-frequency offset estimation value is used to perform a second time-frequency offset compensation on the third target signal after the first time-frequency offset compensation, thereby analyzing the third target signal after the second time-frequency offset compensation.

In a fourth aspect, an embodiment of the present application provides a device, which may be a terminal device, or may be a semiconductor chip disposed in a terminal device. The device has the function of implementing various possible designs of the first to third aspects described above. The function may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the above functions.

In a fifth aspect, an embodiment of the present application provides a device, comprising: a processor and a memory; the processor is used to execute instructions stored in the memory, and when the instructions are executed, the device executes a method in any possible design of the first to third aspects above.

In a sixth aspect, an embodiment of the present application further provides a computer-readable storage medium, comprising instructions, which, when executed, implement the methods in the above aspects or any possible design of the aspects.

In the seventh aspect, the embodiments of the present application also provide a computer program product, including a computer program or instructions, which, when executed, implement the above-mentioned aspects or any possible design of the methods in the aspects.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1a is a schematic diagram of the coverage direction and coverage range of different beams;

FIG1b is a schematic diagram of a system architecture applicable to an embodiment of the present application;

FIG1c is a schematic diagram of another system architecture applicable to the embodiment of the present application;

FIG2a is a schematic diagram of resources occupied by a TRS provided in an embodiment of the present application;

FIG2b is a schematic diagram of the implementation process of implementation method 1 in an embodiment of the present application;

FIG2c is a schematic diagram of the implementation process of implementation method 2 in an embodiment of the present application;

FIG2d is an exemplary diagram of time units occupied by reference signals according to an embodiment of the present application;

FIG3 is a schematic diagram of a flow chart corresponding to a method for updating a time-frequency offset compensation value provided in an embodiment of the present application;

FIG4a is another example diagram of time units occupied by reference signals according to an embodiment of the present application;

FIG4b is another example diagram of time units occupied by reference signals according to an embodiment of the present application;

FIG4c is another example diagram of time units occupied by reference signals according to an embodiment of the present application;

FIG5 is a possible exemplary block diagram of a device involved in an embodiment of the present application;

FIG6 is a schematic diagram of the structure of a device provided in an embodiment of the present application;

FIG. 7 is a schematic diagram of the structure of a terminal device provided in an embodiment of the present application.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

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

(1) Terminal device: a device with wireless transceiver function, which can be deployed on land, including indoors or outdoors, handheld, wearable or vehicle-mounted; it can also be deployed on the water surface (such as ships, etc.); it can also be deployed in the air (such as airplanes, balloons and satellites, etc.). The terminal device can be a mobile phone, a tablet computer (Pad), a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in self driving, a wireless terminal in remote medical, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, etc. The embodiments of the present application do not limit the application scenarios. The terminal equipment may sometimes also be referred to as user equipment (UE), access terminal equipment, UE unit, UE station, mobile station, mobile station, remote station, remote terminal equipment, mobile device, UE terminal equipment, terminal equipment, wireless communication equipment, UE agent or UE device, etc.

(2) Network equipment: It can be equipment that communicates with terminal equipment, such as a base station or a base station controller. Network equipment can provide communication coverage for a specific geographical area and can communicate with terminal equipment located in the coverage area (cell). The network device can be a base transceiver station (BTS) in a global system for mobile communications (GSM) system or a code division multiple access (CDMA), a base station (NodeB, NB) in a wideband code division multiple access (WCDMA) system, an evolved NodeB (eNB or eNodeB) in an LTE system, or a wireless controller in a cloud radio access network (CRAN) scenario, or the network device can be a relay station, an access point, a vehicle-mounted device, a wearable device, and a network device in a future 5G network, for example, a base station (gNodeB or gNB) or a transmission receiving point/transmission reception point (TRP) in a new radio (NR), or the network device can also be a network device in a future evolved public land mobile network (PLMN) network, etc., and the embodiments of the present application are not limited.

(3) Beam: A major problem with high-frequency communications is that signal energy drops sharply with transmission distance, resulting in a short signal transmission distance. To overcome this problem, high-frequency communications use analog beam technology, which uses large-scale antenna arrays for weighted processing to concentrate signal energy in a smaller range, forming a signal similar to a light beam (called an analog beam, or beam for short), thereby increasing the transmission distance.

A beam is a communication resource, and a beam can be a wide beam, a narrow beam, or other types of beams. The technology for forming a beam can be a beamforming technology or other technical means. The beamforming technology can specifically be a digital beamforming technology, an analog beamforming technology, a hybrid digital/analog beamforming technology, etc. Different beams can be considered as different communication resources, and the same information or different information can be sent through different beams. Optionally, multiple beams with the same or similar communication characteristics can be regarded as a beam, and a beam can include one or more antenna ports for transmitting data channels, control channels, etc. It can be understood that one or more antenna ports forming a beam can also be regarded as an antenna port set (or antenna port group), and the beam can also be called a spatial filter.

(4) The various digital numbers such as the first and second involved in the embodiments of the present application are only for the convenience of description, and are not used to limit the scope of the embodiments of the present application, nor do they indicate the order of precedence. "And/or" describes the association relationship of the associated objects, indicating that three relationships may exist. For example, A and/or B can represent: A exists alone, A and B exist at the same time, and B exists alone. "At least one" refers to one or more. At least two refers to two or more. "At least one", "any one" or similar expressions refer to any combination of these items, including any combination of single items (individuals) or plural items (individuals). For example, at least one item (individual, kind) of a, b, or c can represent: a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, c can be single or multiple.

FIG1b is a schematic diagram of a system architecture applicable to an embodiment of the present application. As shown in FIG1b, the architecture includes one or more network devices (such as network device 101) and one or more terminal devices (such as terminal device 102) located within the coverage range of network device 101. In the system architecture shown in FIG1b, network device 101 can communicate with terminal device 102 via a wireless air interface.

FIG1c is another schematic diagram of a system architecture applicable to an embodiment of the present application. As shown in FIG1c, the architecture includes multiple network devices (such as a first network device 1031 and a second network device 1032) and one or more terminal devices (such as a terminal device 104). The first network device 1031 and the second network device 1032 can provide communication coverage for a specific geographical area, and the terminal device 104 is located in the specific geographical area. In the system architecture shown in FIG1c, the first network device 1031 and the second network device 1032 can both communicate with the terminal device 102 through a wireless air interface. Furthermore, the system architecture shown in FIG1c can support coordinated multi-point (COMP) transmission, that is, the first network device 1031 and the second network device 1032 can transmit downlink data to the terminal device 104 using a coordinated multi-point transmission method.

It should be understood that the system architecture shown in Figures 1b and 1c can be applicable to communication systems of various wireless access technologies, such as long term evolution (LTE) communication systems, 5G communication systems and other possible communication systems.

Figure 1b and Figure 1c are only schematic diagrams of the architecture of the communication system. In the embodiments of the present application, there is no limitation on the number of network devices and the number of terminal devices in the communication system. In addition, the communication system to which the embodiments of the present application are applicable may include other devices in addition to network devices and terminal devices, such as core network devices, wireless relay devices, and wireless backhaul devices, etc., which are not limited in the embodiments of the present application. In addition, the network devices in the embodiments of the present application may integrate all functions into an independent physical device, or distribute the functions on multiple independent physical devices, which are not limited in the embodiments of the present application. In addition, the terminal devices in the embodiments of the present application may be connected to the network devices wirelessly.

The system architecture and business scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. A person of ordinary skill in the art can appreciate that with the evolution of the communication system architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

Taking the system architecture shown in FIG1c as an example, in a coordinated multi-point transmission scenario, the first network device can be a serving network device, and the second network device can be a cooperative network device; or the first network device can be a cooperative network device, and the second network device can be a serving network device. It should be noted that in a coordinated multi-point transmission scenario, there can be multiple cooperative network devices, and FIG1c only illustrates one cooperative network device.

The coordinated multi-point transmission scenario can support multiple scheduling modes, such as the service network device can send control signaling to the terminal device, and the cooperative network device can send data to the terminal device; or, the service network device can send control signaling to the terminal device, and the service network device and the cooperative network device can send data to the terminal device at the same time, or, the service network device and the cooperative network device can send control signaling to the terminal device at the same time, and the service network device and the cooperative network device can send data to the terminal device at the same time. The embodiment of the present application is not particularly limited to this. Furthermore, communication can be carried out between the service network device and the cooperative network device and between multiple cooperative network devices, for example, by transmitting control messages through the X2 interface. It can be seen from this that the coordinated multi-point transmission scenario can support joint scheduling of network devices, and can also support separate scheduling of network devices. In the separate scheduling of network devices, two network devices send control signaling separately, and the two network devices send data jointly. In the joint scheduling of network devices, control signaling can be sent by one of the network devices, and the two network devices send data jointly.

Taking the joint scheduling of network devices as an example, in one possible scenario, the first network device can send a target signal 1 to the terminal device through a physical downlink control channel (PDCCH), and the target signal 1 may include a control signal, such as downlink control information (DCI), wherein the PDCCH may be located on the resources indicated by the control resource set (CORESET) (such as CORESET-1) pre-configured by the first network device for the terminal device; and the first network device can send a target signal 2 to the terminal device through a physical downlink shared channel (PDSCH), and the target signal 2 may include, for example, a data signal and a demodulation reference signal (DMRS) (such as DMRS-1), and the second network device may send a target signal 3 to the terminal device through the PDSCH, and the target signal 3 may include, for example, a data signal and a DMRS (such as DMRS-2).

Furthermore, in the 5G communication system, DMRS can be sent through a beam formed by a DMRS antenna port group (DMRS group), where the DMRS group can be configured by high-level signaling. For example, the high-level signaling configuration divides the 12 antenna ports (for example, DMRS antenna ports 1000-1011) into two groups: antenna ports {1000 1002 1004 1006 1008 1010} are one group, and antenna ports {1001 1003 1005 1007 1009 1011} are another group; or, antenna ports {1000-1005} are one group, and antenna ports {1006-1011} are another group. Thus, in one example, the DMRS-1 can be sent through a beam formed by DMRS group 1 (e.g., antenna ports {1000 1002 1004 1006 1008 1010}) (e.g., beam 2 as shown in FIG. 1a ), and DMRS-2 can be sent through a beam formed by DMRS group 2 (e.g., antenna ports {1001 1003 1005 10071009 1011}) (e.g., beam 3 as shown in FIG. 1a ).

In one example, if the first network device sends PDCCH (CORESET-1) through beam 1 as shown in FIG. 1a, and sends PDSCH (DMRS-1) through beam 2 as shown in FIG. 1a, and the second network device sends PDSCH (DMRS-1) through beam 3 as shown in FIG. 1a, then in this case, in order to ensure that the target signal transmitted through these channels can be correctly received by the terminal device, the first network device can configure the terminal device with a corresponding reference signal for time-frequency offset tracking. Among them, the reference signal can be used for time-frequency offset estimation. In one example, the reference signal can be a tracking reference signal (TRS), a synchronization signal block (SSB), or other signals that can be used for time-frequency offset estimation, without specific limitation.

Further, taking the reference signal as TRS as an example, the first network device can send the configuration information of TRS to the terminal device, wherein the configuration information of TRS may include TRS period, TRS length, TRS symbol number, and further, TRS bandwidth, TRS frequency domain interval, TRS time domain interval, and the specific details are not limited. Among them, the TRS period represents the period of TRS, for example, it can be set to Y, the unit is ms; the TRS length represents the length of TRS in each TRS period, for example, it can be set to X, the unit is time slot (slot), illustratively, each time slot can contain 14 orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) symbols; the number of TRS symbols represents the number of OFDM symbols contained in TRS in each time slot; the TRS bandwidth represents the bandwidth of the TRS frequency band, for example, the unit can be the number of resource blocks (resource blocks, RB); the TRS frequency domain interval represents the subcarrier interval of TRS in the frequency domain in each RB; the TRS time domain interval represents the interval of TRS in the time domain in each RB.

See Figure 2a for an example of TRS. In Figure 2a, each small square can be understood as a resource element (RE), the TRS length is 2 time slots, and in each time slot, the TRS contains 2 symbols (the 6th symbol and the 11th symbol, respectively). If the TRS period is 3ms, when the duration of each time slot is 0.5ms, the TRS of the next period can be located in time slot n+6 and time slot n+7.

In an embodiment of the present application, the first network device may configure multiple reference signals for the terminal device to perform time-frequency offset tracking. See Table 1, which is an example of the relationship between the reference signals configured by the first network device and the target signal.

Table 1: Example of the relationship between reference signal and target signal

Target channel (target signal) Reference signal PDSCH (DMRS-1) TRS1 PDSCH (DMRS-2) TRS2 PDCCH (control signal) SSB5

In Table 1, the antenna port of TRS1 has a quasi-co-location (QCL) relationship with the DMRS Goup1 of PDSCH, that is, the beam direction of TRS1 is consistent with the beam direction of DMRS-1 of PDSCH. The antenna port of TRS2 has a QCL relationship with the DMRS Goup2 of PDSCH, that is, the beam direction of TRS2 is consistent with the beam direction of DMRS-2 of PDSCH. The antenna port of SSB5 has a QCL relationship with the antenna port of the control signal of PDCCH, that is, the beam direction of SSB5 is consistent with the beam direction of the control signal of PDCCH.

Among them, the signals sent by the antenna ports with a QCL relationship will undergo the same large-scale fading and have the same large-scale characteristic parameters. For example, when antenna port A and antenna port B are said to have a QCL relationship, it means that the channel large-scale characteristic parameters estimated by signal 1 on antenna port A are also suitable for signal 2 on antenna port B. In the embodiment of the present application, antenna port A and antenna port B having a QCL relationship can also be described as signal 1 and signal 2 having a QCL relationship. Among them, the large-scale characteristic parameters include one or more of the following: delay spread, Doppler spread, Doppler frequency shift, average channel gain and average delay, etc. In the 5G communication system, the large-scale characteristic parameters may also include spatial domain information, such as one or more of the received angle of arrival (angle of arival, AOA), angle of arrival spread (angle of arival spread, AAS), transmit angle of departure (angle of departure, AOD), angle of departure spread (angle of departure spread, ADS) and spatial correlation, etc.

It should be noted that, taking PDSCH (DMRS-1) as an example, the first network device can configure one or more reference signals having a QCL relationship with PDSCH (DMRS-1) for the terminal device. When multiple reference signals are configured, the configuration information of the multiple reference signals may be different, and the multiple reference signals may be used to estimate the time-frequency offset of PDSCH in different dimensions. In the embodiment of the present application, only the case of configuring TRS1 is exemplarily described as an example.

In a possible implementation method (referred to as implementation method 1), time-frequency offset compensation can be performed on each target signal based on each reference signal. For example, as shown in Figure 2b, the time-frequency offset estimation result of TRS1 can be used for time-frequency offset compensation of DMRS-1 of PDSCH, the time-frequency offset estimation result of TRS2 can be used for time-frequency offset compensation of DMRS-2 of PDSCH, and the time-frequency offset estimation result of SSB5 can be used for time-frequency offset compensation of the control signal of PDCCH. That is to say, after the terminal device receives the DMRS-1 of the PDSCH, it can perform time-frequency offset compensation on the DMRS-1 based on the time-frequency offset compensation value a1 (the time-frequency offset compensation value a1 is generated according to the time-frequency offset estimation result of TRS1), and then parse DMRS-1 to obtain the channel estimation value of the PDSCH that transmits DMRS-1, and the channel estimation value can be used to demodulate the data transmitted in the PDSCH; after the terminal device receives the DMRS-2 of the PDSCH, it can perform time-frequency offset compensation on the DMRS-2 based on the time-frequency offset compensation value a2 (the time-frequency offset compensation value a2 is generated according to the time-frequency offset estimation result of TRS2), and then parse DMRS-2 to obtain the channel estimation value of the PDSCH that transmits DMRS-2, and the channel estimation value can be used to demodulate the data transmitted in the PDSCH; after the terminal device receives the control signal of the PDCCH, it can perform time-frequency offset compensation on the control signal based on the time-frequency offset compensation value a3 (the time-frequency offset compensation value a3 is generated according to the time-frequency offset estimation result of SSB5), and then parse the control signal.

It should be noted that in implementation method 1, taking the loop corresponding to TRS1 as an example, the time-frequency offset compensation value can be continuously updated. For example, in the initial situation, the time-frequency offset compensation value can be a preset value a00. If TRS1 is received in the first TRS1 cycle (referred to as TRS1-1 for ease of description), a00 can be used to perform time-frequency offset compensation on TRS1-1, and the time-frequency offset estimation value of TRS1-1 after time-frequency offset compensation is calculated. If the time-frequency offset estimation value is greater than the preset threshold, a time-frequency offset compensation value a01 is generated, and the time-frequency offset compensation value of the loop corresponding to TRS1 is updated to a01; if TRS1 is received in the second TRS1 cycle -2, a01 can be used to compensate TRS1-2 for time-frequency offset, and the estimated time-frequency offset of TRS1-2 after time-frequency offset compensation is calculated. If the estimated time-frequency offset is greater than the preset threshold, a time-frequency offset compensation value a02 is generated, and the time-frequency offset compensation value of the loop corresponding to TRS1 is updated to a02; if TRS1-3 is received in the third TRS1 cycle, a02 can be used to compensate TRS1-3 for time-frequency offset, and the estimated time-frequency offset of TRS1-3 after time-frequency offset compensation is calculated. If the estimated time-frequency offset is less than or equal to the preset threshold, the time-frequency offset compensation value of the loop corresponding to TRS1 remains unchanged and is still a02; and so on. Among them, the preset threshold can be set by those skilled in the art according to actual needs, and is not specifically limited.

In another possible implementation (referred to as implementation 2), in order to save costs, one of the reference signals can be selected, such as TRS1. In this case, the loop corresponding to TRS1 is used as the main loop for time-frequency offset compensation, and the time-frequency estimation result of TRS1 can compensate for the time-frequency offset of all signals. In this case, as shown in FIG2c, the time-frequency offset estimation result of TRS1 is used for time-frequency offset compensation of DMRS-1 of PDSCH, DMRS-2 of PDSCH, and control signal of PDCCH; the time-frequency offset estimation result of TRS2 is used to correct the difference between it and the time-frequency offset estimation result of TRS1; the time-frequency offset estimation result of SSB5 is used to correct the difference between it and the time-frequency offset estimation result of TRS1. That is to say, after the terminal device receives the DMRS-1 of the PDSCH, it can perform the first time-frequency offset compensation on the DMRS-1 based on the time-frequency offset compensation value b1 (the time-frequency offset compensation value b1 is generated according to the time-frequency offset estimation result of TRS1), and then parse the DMRS-1 to obtain the channel estimation value of the PDSCH that transmits DMRS-1, and the channel estimation value can be used to demodulate the data transmitted in the PDSCH; after the terminal device receives the DMRS-2 of the PDSCH, it can perform the first time-frequency offset compensation on the DMRS-2 based on the time-frequency offset compensation value b1, and based on the time-frequency offset compensation value b2 (the time-frequency offset compensation value b2 is used to correct The channel estimation value of the PDSCH transmitting DMRS-2 can be obtained, and the channel estimation value can be used to demodulate the data transmitted in the PDSCH; after the terminal device receives the control signal of the PDCCH, it can perform the first time-frequency offset compensation on the control signal based on the time-frequency offset compensation value b1, and perform the second time-frequency offset compensation on the control signal based on the time-frequency offset compensation value b3 (the time-frequency offset compensation value b3 is used to correct the difference between the time-frequency offset estimation results of SSB5 and TRS1), and then parse the control signal.

It should be noted that, in implementation mode 2, taking the first time-frequency offset compensation as an example, the time-frequency offset compensation value may be continuously updated, and the updating method thereof refers to the description in the above implementation mode 1.

However, since in implementation method 1, the time-frequency offset compensation is performed on each target signal based on the reference signal on each loop, the time-frequency offset compensation value on each loop is independent, while in implementation method 2, the time-frequency offset compensation of the main loop directly acts on other loops. In this way, when the time-frequency offset compensation value is updated, if the update timing is unreasonable, it may cause the time-frequency offset estimation value on other loops to be inaccurate, thereby failing to accurately receive the signal.

Taking frequency offset estimation as an example, the analysis is as follows:

Δθ＝2*π*Δf*t……Formula 1

Among them, Δθ represents the phase deviation, t represents the time, and Δf represents the frequency deviation.

According to Formula 1, when the frequency deviation is constant, the phase deviation is a function of time, so the frequency deviation can be calculated based on the phase deviation.

The following describes the steps of phase deviation estimation based on TRS using the resource distribution of TRS as shown in Figure 2a. In Figure 2a, the four columns of TRS symbols are distributed in the 6th symbol and the 10th symbol of time slot n, and the 6th symbol and the 10th symbol of time slot n+1.

The phase deviation Δθ ₁ can be obtained by cross product operation between the 6th symbol and the 10th symbol in time slot n. Further, according to the above formula 1, it can be known that:

Δθ ₁ = 2π*Δf _x *Δt ₁ ……Formula 2

Wherein, Δt ₁ represents the time difference between the 6th symbol and the 10th symbol in time slot n, and Δf _x represents the frequency offset between the 6th symbol and the 10th symbol in time slot n.

Then we can get:

In the same way, the frequency offset between the 10th symbol in time slot n and the 6th symbol in time slot n+1 is:

Wherein, Δθ ₂ represents the phase deviation between the 10th symbol in time slot n and the 6th symbol in time slot n+1, Δt ₂ represents the time difference between the 10th symbol and the 6th symbol in time slot n, and Δf _y represents the frequency deviation between the 10th symbol and the 6th symbol in time slot n.

The basic assumption of frequency offset estimation is that the frequency offsets between multiple symbols are the same, and the frequency offsets obtained between different symbols are combined to obtain a frequency offset estimation value. Therefore, the above Δf _x and Δf _y are combined to obtain a TRS frequency offset estimation value. There are many ways to combine, such as taking an average value.

It should be noted that the above only combines the frequency offset between the 6th symbol and the 10th symbol in time slot n and the frequency offset between the 10th symbol in time slot n and the 6th symbol in time slot n+1 to obtain the frequency offset estimate of TRS. In other possible methods, the frequency offset between the 6th symbol in time slot n and the 10th symbol in time slot n+1 can also be obtained, and then the three frequency offsets are combined to obtain the frequency offset estimate of TRS.

According to the above analysis, for example, as shown in Figure 2d, TRS1 is located in time slot n and time slot n+1, TRS2 is located in time slot n+2 and time slot n+3, and SSB5 is located in time slot n+4 and time slot n+5. After the terminal device receives TRS1 in time slot n and time slot n+1 and generates a new time-frequency offset compensation value, if the time-frequency shift compensation value is updated at the end of time slot n+2, the frequency offset estimation result of TRS2 will be inaccurate. Similarly, the time-frequency estimation result of TRS2 will also be inaccurate.

Based on this, the embodiment of the present application provides a communication method and device for solving the technical problem that the configuration moment of the time-frequency offset compensation value is unreasonable, resulting in inaccurate time-frequency offset estimation value. The method provided in the embodiment of the present application can be applied to a receiving device. In the embodiment of the present application, the transmitting device can be the network device 101 illustrated in FIG. 1b, and the receiving device can be the terminal device 102 illustrated in FIG. 1b; or, the transmitting device can include the network device 1031 and the network device 1032 illustrated in FIG. 1c, and the receiving device can be the terminal device 104 illustrated in FIG. 1c; there is no specific limitation.

Specifically, the method may include: receiving a reference signal a, and performing time-frequency offset compensation on the reference signal a; wherein the time-frequency offset compensation value used to perform time-frequency offset compensation on the reference signal a is configured before receiving the reference signal a, and the reference signal a is the reference signal using the time-frequency compensation value for the first time.

In this way, on the one hand, since the time-frequency offset compensation value used to compensate the reference signal a for time-frequency offset is configured before receiving the reference signal a, the reference signal a is compensated based on the configured time-frequency offset compensation value, thereby avoiding the problem of inaccurate time-frequency offset estimation value calculated based on the compensated reference signal a due to unreasonable configuration time of the time-frequency offset compensation value. On the other hand, the reference signal a is the reference signal that uses the time-frequency compensation value for the first time. Since the time-frequency offset compensation value is configured before receiving the reference signal a that uses the time-frequency offset compensation value for the first time, subsequent reference signals can be compensated based on the time-frequency offset compensation value, thereby effectively ensuring the accuracy of the time-frequency offset estimation value calculated based on the compensated subsequent reference signals.

In one example, the time-frequency offset compensation value may be configured at the beginning of the first time slot where the reference signal a is located.

In another example, the time-frequency offset compensation value is configured at the start time of the first time slot before the first time slot where the reference signal a is located. In this case, if the time slot where the reference signal b is located includes the first time slot and the second time slot, the second time slot is adjacent to the first time slot and is located before the first time slot; the reference signal b is a reference signal for time-frequency offset estimation, then the use of the time-frequency offset compensation value to compensate for the time-frequency offset of the reference signal b can be abandoned. It should be noted that in other possible embodiments, the above-mentioned time-frequency offset compensation value can also be received and used to compensate for the time-frequency offset of the reference signal b. The specific implementation can be seen below.

It should be noted that the reference signal 1 and the reference signal 2 described above may be reference signals other than the reference signal on the main loop (such as the TRS1 described above), and are not specifically limited.

The method provided in the embodiment of the present application is described in detail below in conjunction with FIG. 3 , including configuring the time-frequency offset compensation value (or updating the time-frequency offset compensation value) and the specific implementation of the time-frequency offset compensation.

FIG3 is a flow chart of a communication method according to an embodiment of the present application. As shown in FIG3 , the method includes:

Step 301: Receive a first reference signal sent by a transmitting device.

Here, the loop corresponding to the first reference signal may be a main loop of time-frequency offset compensation.

Step 302, using the i-th time-frequency offset compensation value to perform time-frequency offset compensation on the first reference signal, and calculating a first time-frequency offset estimation value of the first reference signal after the time-frequency offset compensation according to the first reference signal after the time-frequency offset compensation, and if the first time-frequency offset estimation value is greater than a preset threshold, generating an i+1-th time-frequency offset compensation value according to the first time-frequency offset estimation value. The preset threshold value can be set by those skilled in the art according to actual needs, and is not specifically limited.

Step 303: Update the i-th time-frequency offset compensation value to the i+1-th time-frequency offset compensation value according to the time unit where the N reference signals are located, where i is a positive integer. The N reference signals are signals used for time-frequency offset estimation, such as TRS or SSB; the N reference signals may include a first reference signal.

Here, the N reference signals may not have a quasi-co-located QCL relationship (such as TRS1, TRS2, and SSB5 shown in Table 1), or, in other possible situations (such as configuring multiple reference signals with a QCL relationship for a certain channel, and multiple reference signals can be used for time-frequency offset estimation in different dimensions), some of the N reference signals may also have a quasi-co-located QCL relationship. The following description will mainly take the example of N reference signals not having a quasi-co-located QCL relationship as an example.

In the embodiment of the present application, since the time unit in which the N reference signals are located is fully considered when the i-th time-frequency offset compensation value is updated to the i+1-th time-frequency offset compensation value, the i-th time-frequency offset compensation value can be updated to the i+1-th time-frequency offset compensation value at an appropriate time.

Specifically, the receiving end device may receive configuration information of N reference signals sent by the transmitting end device, where the configuration information is used to indicate the time unit where the N reference signals are located, so that the receiving end device may obtain the time unit where the N reference signals are located, where the time unit may be a time slot. The specific content included in the configuration information may refer to the description above.

Further, the receiving end device may update the i-th time-frequency offset compensation value to the i+1-th time-frequency offset compensation value at the alternative time closest to the moment when the i+1-th time-frequency offset compensation value is generated, based on the time units where the N reference signals are located, if it is determined that there is at least one alternative time within the set time period after the moment when the i+1-th time-frequency offset compensation value is generated; wherein the set time period after the moment when the i+1-th time-frequency offset compensation value is generated may be the time length between the moment when the i+1-th time-frequency offset compensation value is generated and the start time of the time unit where the first reference signal of the next cycle is located. For example, referring to FIG4a, the period of the first reference signal is a time length of 6 time units, the time unit where the currently received first reference signal is located includes time unit 1 and time unit 2, and the time unit where the first reference signal of the next cycle is located includes time unit 7 and time unit 8, then the time length between the moment when the i+1-th time-frequency offset compensation value is generated and the start time of time unit 7 is the set time period.

In the embodiment of the present application, each of the at least one alternative moment meets the following conditions: located at the end position of the first time unit or the start position of the second time unit; for each reference signal in the N reference signals, if the time unit where the reference signal is located includes the first time unit, the second time unit is not included, or, if the second time unit is included, the first time unit is not included. For example, referring to FIG4b, the N reference signals include the first reference signal, the reference signal 2, and the reference signal 3, wherein the time unit where the first reference signal is located includes the time unit 1 and the time unit 2, the time unit where the reference signal 2 is located includes the time unit 3 and the time unit 4, and the time unit where the reference signal 3 is located includes the time unit 5 and the time unit 6, then the alternative moments that meet the conditions can be: the start time of the time unit 3 (or the end time of the time unit 2), the start time of the time unit 5 (or the end time of the time unit 4), and the start time of the time unit 7 (or the end time of the time unit 6).

If the receiving end device determines that there is no qualified alternative time within the set time period after the moment of generating the i+1th time-frequency offset compensation value, for example, referring to FIG4c, N reference signals include the first reference signal, reference signal 2, reference signal 3, and reference signal 4, the time unit where the first reference signal is located includes time unit 1 and time unit 2, the time unit where reference signal 2 is located includes time unit 2 and time unit 3, the time unit where reference signal 3 is located includes time unit 3 and time unit 4, and the time unit where reference signal 4 is located includes time unit 4 and time unit 5, in this case, the receiving end device can update the i-th time-frequency offset compensation value to the i+1-th time-frequency offset compensation value at the first moment. Among them, the first moment is the end position of the third time unit or the start position of the fourth time unit, the time unit where the second reference signal is located includes the third time unit and the fourth time unit, and the second reference signal can be reference signal 2, reference signal 3, or reference signal 4. When the second reference signal is reference signal 2, the first moment can be the starting moment of time unit 3 (or the ending moment of time unit 2); when the second reference signal is reference signal 3, the first moment can be the starting moment of time unit 4 (or the ending moment of time unit 3); when the second reference signal is reference signal 4, the first moment can be the starting moment of time unit 5 (or the ending moment of time unit 4).

Further, in a possible implementation, the receiving end device may abandon receiving the second reference signal at the third time unit and the fourth time unit, thereby avoiding inaccurate time-frequency offset estimation results of the second reference signal received at the third time unit and the fourth time unit. Subsequently, after the receiving end device receives the second target signal having a QCL relationship with the second reference signal sent by the transmitting end device, the receiving end device may use the last time-frequency offset estimation result for compensation.

In another possible implementation, the receiving end device may receive the second reference signal at the third time unit and the fourth time unit. At this time, the second reference signal includes the first part of the signal located in the third time unit and the second part of the signal located in the fourth time unit. The receiving end device may use the i-th time-frequency offset compensation value to perform the first time-frequency offset compensation on the first part of the signal, and use the difference between the i+1-th time-frequency offset compensation value and the i-th time-frequency offset compensation value to perform the second time-frequency offset compensation on the first part of the signal after the first time-frequency offset compensation, and use the i+1-th time-frequency offset compensation value to perform the time-frequency offset compensation on the second part of the signal; and then calculate the second time-frequency offset estimation value according to the first part of the signal after the second time-frequency offset compensation and the second part of the signal after the time-frequency offset compensation. Since the time-frequency offset compensation is performed twice on the first part of the signal, it is equivalent to using the i+1-th time-frequency offset compensation value to perform the time-frequency offset compensation on the first part of the signal, so that the calculated second time-frequency offset estimation value is more accurate. Subsequently, after the receiving end device receives the second target signal having a QCL relationship with the second reference signal sent by the transmitting end device, the receiving end device can use the i+1th time-frequency offset compensation value to perform the first time-frequency offset compensation on the second target signal, and use the second time-frequency offset estimation value to perform the second time-frequency offset compensation on the second target signal after the first time-frequency offset compensation, and then demodulate the second target signal after the second time-frequency offset compensation. The specific implementation process of performing time-frequency offset compensation on the second target signal can be shown in Figure 2c, and the second target signal can be the DMRS-2 of the PDSCH in Figure 2c, or it can also be the control signal of the PDCCH in Figure 2c.

Exemplarily, taking the second reference signal as reference signal 2 shown in FIG. 4c, after the receiving end device updates the i-th time-frequency offset compensation value to the i+1-th time-frequency offset compensation value, it also includes: receiving the third reference signal sent by the transmitting end device; using the i+1-th time-frequency offset compensation value to perform time-frequency offset compensation on the third reference signal, and calculating the third time-frequency offset estimation value of the third reference signal after the time-frequency offset compensation. Subsequently, if the receiving end device receives a third target signal having a QCL relationship with the third reference signal sent by the transmitting end device, the i+1-th time-frequency offset compensation value can be used to perform the first time-frequency offset compensation on the third target signal, and the third time-frequency offset estimation value can be used to perform the second time-frequency offset compensation on the third target signal after the first time-frequency offset compensation, and then the third target signal after the second time-frequency offset compensation can be analyzed. The specific implementation process of time-frequency offset compensation for the third target signal can be seen in Figure 2c. If the second target signal is the DMRS-2 of the PDSCH in Figure 2c, the third target signal can be the control signal of the PDCCH in Figure 2c; if the second target signal is the control signal of the PDCCH in Figure 2c, the third target signal can be the DMRS-2 of the PDSCH in Figure 2c.

In an embodiment of the present application, after the receiving end device updates the i-th time-frequency offset compensation value to the i+1-th time-frequency offset compensation value, if a first target signal having a QCL relationship with the first reference signal is received from the transmitting end device, the i+1-th time-frequency offset compensation value can be used to perform time-frequency offset compensation on the first target signal, and the first target signal after time-frequency offset compensation can be analyzed. The specific implementation process of performing time-frequency offset compensation on the first target signal can be shown in FIG2c, where the first target signal is DMRS-1 of the PDSCH in FIG2c.

The above mainly introduces the scheme provided by the embodiment of the present application from the perspective of the interaction between the transmitting device and the receiving device. It is understandable that in order to achieve the above functions, the transmitting device or the receiving device may include a hardware structure and/or software module corresponding to the execution of each function. It should be easily appreciated by those skilled in the art that, in combination with the units and algorithm steps of each example described in the embodiments disclosed herein, the embodiments of the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present application.

In the case of adopting an integrated unit (module), FIG. 5 shows a possible exemplary block diagram of the device involved in the embodiment of the present application, and the device 500 may exist in the form of software. The device 500 may include: a processing unit 502 and a communication unit 503. The processing unit 502 is used to control and manage the actions of the device 500. The communication unit 503 is used to support the communication between the device 500 and other devices. Optionally, the communication unit 503 is also called a transceiver unit, and may include a receiving unit and/or a sending unit, which are used to perform receiving and sending operations, respectively. The device 500 may also include a storage unit 501 for storing program code and/or data of the device 500.

The processing unit 502 may be a processor or a controller, which may implement or execute various exemplary logic blocks, modules and circuits described in conjunction with the disclosed contents of the embodiments of the present application. The communication unit 503 may be a communication interface, a transceiver or a transceiver circuit, etc., wherein the communication interface is a general term, and in a specific implementation, the communication interface may include multiple interfaces. The storage unit 501 may be a memory.

The device 500 may be a receiving device in any of the above embodiments, or may be a semiconductor chip disposed in the receiving device. The processing unit 502 may support the device 500 in executing the actions of the receiving device in each of the above method examples. Alternatively, the processing unit 502 mainly executes the internal actions of the receiving device in the method examples, and the communication unit 503 may support the communication between the device 500 and other devices.

Specifically, in one embodiment, a communication unit is used to receive a first reference signal; a processing unit is used to perform time-frequency offset compensation on the first reference signal; wherein the time-frequency offset compensation value used to perform time-frequency offset compensation on the first reference signal is configured before receiving the first reference signal, and the first reference signal is a reference signal that uses the time-frequency compensation value for the first time.

In one possible design, the time-frequency offset compensation value is configured at the beginning of the first time slot where the first reference signal is located.

In one possible design, the time-frequency offset compensation value is configured at the start time of a first time slot before a first time slot where the first reference signal is located.

In one possible design, the time slot where the second reference signal is located includes the first time slot and the second time slot, the second time slot is adjacent to the first time slot and is located before the first time slot; the second reference signal is a reference signal for time-frequency offset estimation;

The processing unit abandons using the time-frequency offset compensation value to perform time-frequency offset compensation on the second reference signal.

It should be noted that the division of units (modules) in the embodiments of the present application is schematic and is only a logical function division. There may be other division methods in actual implementation. The functional modules in the embodiments of the present application may be integrated into a processing module, or each module may exist physically separately, or two or more modules may be integrated into one module. The above-mentioned integrated modules may be implemented in the form of hardware or in the form of software functional modules.

If the integrated module is implemented in the form of a software function module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the embodiment of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor (processor) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium can be various media such as a memory that can store program codes.

FIG6 shows a schematic diagram of the structure of a device, wherein the device 600 includes a processor 610, a memory 620, and a transceiver 630. In one example, the device 600 can implement the functions of the device 500 illustrated in FIG5 . Specifically, the functions of the communication unit 503 illustrated in FIG5 can be implemented by the transceiver, the functions of the processing unit 502 can be implemented by the processor, and the functions of the storage unit 501 can be implemented by the memory. In another example, the device 600 can be a terminal device in the above method embodiment, and the device 600 can be used to implement the method corresponding to the terminal device described in the above method embodiment. For details, please refer to the description in the above method embodiment.

FIG. 7 is a schematic diagram of the structure of a terminal device 700 provided in an embodiment of the present application. For ease of explanation, FIG. 7 only shows the main components of the terminal device. As shown in FIG. 7 , the terminal device 700 includes a processor, a memory, a control circuit, an antenna, and an input/output device. The terminal device 700 can be applied to the system architecture shown in FIG. 1b and FIG. 1c to perform the functions of the terminal device in the above method embodiment.

The processor is mainly used to process the communication protocol and communication data, as well as to control the entire terminal device, execute the software program, and process the data of the software program, for example, to control the terminal device to perform the actions described in the above method embodiment. The memory is mainly used to store software programs and data. The control circuit is mainly used for converting baseband signals and radio frequency signals and processing radio frequency signals. The control circuit and the antenna together can also be called a transceiver, which is mainly used to send and receive radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, keyboards, etc. are mainly used to receive data input by users and output data to users.

When the terminal device is turned on, the processor can read the software program in the storage unit, interpret and execute the instructions of the software program, and process the data of the software program. When data needs to be sent wirelessly, the processor performs baseband processing on the data to be sent, and outputs the baseband signal to the RF circuit. The RF circuit performs RF processing on the baseband signal and then sends the RF signal outward in the form of electromagnetic waves through the antenna. When data is sent to the terminal device, the RF circuit receives the RF signal through the antenna, converts the RF signal into a baseband signal, and outputs the baseband signal to the processor. The processor converts the baseband signal into data and processes the data.

Those skilled in the art will appreciate that, for ease of explanation, FIG. 7 shows only one memory and processor. In an actual terminal device, there may be multiple processors and memories. The memory may also be referred to as a storage medium or a storage device, etc., which is not limited in the embodiments of the present application.

As an optional implementation, the processor may include a baseband processor and a central processor, the baseband processor is mainly used to process the communication protocol and communication data, and the central processor is mainly used to control the entire terminal device, execute the software program, and process the data of the software program. The processor in FIG7 integrates the functions of the baseband processor and the central processor. It can be understood by those skilled in the art that the baseband processor and the central processor may also be independent processors, interconnected by technologies such as buses. It can be understood by those skilled in the art that the terminal device may include multiple baseband processors to adapt to different network formats, the terminal device may include multiple central processors to enhance its processing capabilities, and the various components of the terminal device may be connected through various buses. The baseband processor may also be described as a baseband processing circuit or a baseband processing chip. The central processor may also be described as a central processing circuit or a central processing chip. The function of processing the communication protocol and the communication data may be built into the processor, or may be stored in the storage unit in the form of a software program, and the processor executes the software program to implement the baseband processing function.

The terminal device 700 shown in FIG7 can implement various processes related to the terminal device in the method embodiment shown in FIG3. The operations and/or functions of each module in the terminal device 700 are respectively to implement the corresponding processes in the above method embodiment. For details, please refer to the description in the above method embodiment. To avoid repetition, the detailed description is appropriately omitted here.

In the implementation process, each step in the method provided in this embodiment can be completed by an integrated logic circuit of hardware in a processor or by instructions in the form of software. The steps of the method disclosed in the embodiment of the present application can be directly embodied as being executed by a hardware processor, or by a combination of hardware and software modules in a processor.

It should be noted that the processor in the embodiment of the present application can be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method embodiment can be completed by the hardware integrated logic circuit in the processor or the instructions in the form of software. The above processor can be a general-purpose central processing unit (CPU), a general-purpose processor, a digital signal processing (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof; it can also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of DSP and microprocessors, etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc.

It can be understood that the memory or storage unit in the embodiments of the present application can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory can be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate synchronous DRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), and direct rambus RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer program or instruction is loaded and executed on a computer, the process or function described in the embodiment of the present application is executed in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer program or instruction may be stored in a computer-readable storage medium or transmitted through the computer-readable storage medium. The computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server that integrates one or more available media. The available medium may be a magnetic medium, such as a floppy disk, a hard disk, or a tape; it may also be an optical medium, such as a DVD; it may also be a semiconductor medium, such as a solid state disk (SSD).

The various illustrative logic units and circuits described in the embodiments of the present application can be implemented or operated by a general-purpose processor, a digital signal processor, an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic, a discrete hardware component, or the design of any combination of the above to implement or operate the described functions. The general-purpose processor can be a microprocessor, and optionally, the general-purpose processor can also be any traditional processor, controller, microcontroller or state machine. The processor can also be implemented by a combination of computing devices, such as a digital signal processor and a microprocessor, a plurality of microprocessors, one or more microprocessors combined with a digital signal processor core, or any other similar configuration to implement.

The steps of the method or algorithm described in the embodiments of the present application can be directly embedded in the hardware, the software unit executed by the processor, or the combination of the two. The software unit can be stored in a RAM memory, a flash memory, a ROM memory, an EPROM memory, an EEPROM memory, a register, a hard disk, a removable disk, a CD-ROM or other storage media of any form in the art. Exemplarily, the storage medium can be connected to the processor so that the processor can read information from the storage medium and can write information to the storage medium. Optionally, the storage medium can also be integrated into the processor. The processor and the storage medium can be arranged in an ASIC, and the ASIC can be arranged in a terminal device. Optionally, the processor and the storage medium can also be arranged in different components in the terminal device.

These computer program instructions may also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, whereby the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one or more processes in the flowchart and/or one or more boxes in the block diagram.

Although the embodiments of the present application are described in conjunction with specific features, it is obvious that various modifications and combinations can be made thereto without departing from the spirit and scope of the embodiments of the present application. Accordingly, this specification and the accompanying drawings are merely exemplary illustrations of the embodiments of the present application as defined by the appended claims, and are deemed to have covered any and all modifications, variations, combinations or equivalents within the scope of the embodiments of the present application.

Claims (6)

1. A communication method, characterized in that the method comprises: receiving a first reference signal; Performing time-frequency offset compensation on the first reference signal using the time-frequency offset compensation value; The first reference signal is a reference signal used for time-frequency offset estimation and using the time-frequency offset compensation value for the first time; The time-frequency offset compensation value is configured at the start time of the first time slot where the first reference signal is located; or, the time-frequency offset compensation value is configured at the start time of the first time slot before the first time slot where the first reference signal is located. 2. The method according to claim 1, characterized in that: The time slot where the second reference signal is located includes the first time slot and the second time slot, the second time slot is adjacent to the first time slot and is located before the first time slot; the second reference signal is a reference signal used for time-frequency offset estimation; The method further includes: abandoning using the time-frequency offset compensation value to perform time-frequency offset compensation on the second reference signal. 3. A communication device, characterized in that the device comprises: A communication unit, configured to receive a first reference signal; a processing unit, configured to perform time-frequency offset compensation on the first reference signal using the time-frequency offset compensation value; The first reference signal is a reference signal used for time-frequency offset estimation and using the time-frequency offset compensation value for the first time; The time-frequency offset compensation value is configured at the start time of the first time slot where the first reference signal is located; or, The time-frequency offset compensation value is configured at the start time of a first time slot before a first time slot where the first reference signal is located. 4. The device according to claim 3, characterized in that: The time slot where the second reference signal is located includes the first time slot and the second time slot, the second time slot is adjacent to the first time slot and is located before the first time slot; the second reference signal is a reference signal used for time-frequency offset estimation; The processing unit abandons using the time-frequency offset compensation value to perform time-frequency offset compensation on the second reference signal. 5. A communication device, characterized in that the communication device comprises a processor and a memory, the processor is used to execute instructions stored in the memory, and when the instructions are executed, the device executes the method according to claim 1 or 2. 6. A computer-readable storage medium, comprising instructions, which, when executed, implement the method according to claim 1 or 2.