Communication method and apparatus, storage medium, and program product

Abstract

Embodiments of the present application provide a communication method and apparatus, a storage medium, and a program product. The method comprises: a network device sends, on a first resource, a first reference signal corresponding to a first device, and sends, on a second resource, a second reference signal corresponding to a second device; and the network device receives a phase difference, wherein the phase difference is determined on the basis of channels on a first RE and a second RE that have an agreed position relationship. Alternatively, the network device receives a phase difference and a time deviation and / or a frequency deviation associated with the phase difference. By implementing the present application, a more accurate phase difference between channels on the first device and the second device can be obtained.

Description

Communication method, apparatus, storage medium and program product

[0001] This application claims priority to the Chinese patent application No. 202411097558.6, filed on August 9, 2024, with the State Intellectual Property Office of China, and entitled "Communication method, apparatus, storage medium and program product", the entire content of which is incorporated herein by reference. TECHNICAL FIELD

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

[0003] The multi-transmission reception point (TRP) technology refers to that two or more TRPs can be used to perform control signaling and uplink and downlink data transmission with a terminal device. When multiple TRPs perform downlink data transmission with the terminal device, a coherent transmission mode or a non-coherent transmission mode can be used. In the non-coherent transmission mode, each TRP performs precoding independently. In the coherent transmission mode, multiple TRPs jointly perform precoding, so that the downlink data transmitted by multiple TRPs can be superimposed in phase when reaching the terminal device, thereby improving the transmission performance.

[0004] Further, in a time division duplexing (TDD) frequency band, multiple TRPs can perform downlink precoding according to uplink channels. Generally, the uplink and downlink channels of a TRP can differ by a phase factor. When the uplink channel is represented as h, the downlink channel can be represented as h jθ , for example. The uplink channel of TRP1 is h1, and the downlink channel can be represented as h The uplink channel of TRP2 is h2, and the downlink channel can be represented as h If joint precoding is directly performed according to the uplink channels h1 and h2, the real downlink channels cannot be well adapted, so the value of θ1-θ2 needs to be considered at least when performing joint precoding. θ1 is the phase difference between the uplink and downlink channels of TRP1, θ2 is the phase difference between the uplink and downlink channels of TRP2, i.e., θ1=θ 1,DL -θ 1,UL , θ2=θ 2,DL -θ 2,UL , θ1-θ2=θ 1,DL -θ 1,UL -(θ 2,DL -θ 2,UL )=(θ 1,DL -θ 2,DL )-(θ 1,UL -θ2,UL It can be seen that θ1-θ2 can be obtained based on the phase difference of the downlink channel of TRP1 and TRP2, and the difference between the phase difference of the uplink channel of TRP1 and TRP2.

[0005] Currently, when determining the phase difference of the downlink or uplink channel of TRP1 and TRP2, the phase difference of the downlink or uplink channel of TRP1 and TRP2 is inaccurate. SUMMARY

[0006] Embodiments of the present application provide a communication method, device, storage medium and program product, which can obtain a more accurate phase difference of the channel of the first device and the second device.

[0007] In a first aspect, embodiments of the present application provide a communication method, which can be executed by a network device, a component (such as a processor, a chip, or a chip system, etc.) of the network device, and a logic module or software capable of implementing all or part of the network device. Hereinafter, the communication method is taken as an example for description, and the network device includes a first device and a second device.

[0008] The communication method includes: transmitting a first reference signal corresponding to the first device on a first resource, and transmitting a second reference signal corresponding to the second device on a second resource; and receiving a phase difference, which is determined according to channels on a first resource element (RE) and a second RE, the first RE belongs to the first resource, the second RE belongs to the second resource, and the first RE and the second RE have a predetermined positional relationship.

[0009] According to the method described in the first aspect, the phase difference received by the network device is determined based on the channels on the first RE and the second RE. Since the first RE and the second RE have the predetermined positional relationship, the affected part in the phase difference, i.e., the additional phase difference, can be accurately obtained. For example, the frequency deviation between the first device and the second device will accumulate in the time domain to cause the additional phase difference, and / or the time deviation between the first device and the second device will accumulate in the frequency domain to cause the additional phase difference. The first RE and the second RE have the predetermined positional relationship in the time domain and / or the frequency domain, so that the additional phase difference caused by the predetermined positional relationship can be accurately obtained. In this way, even if the additional phase difference exists in the phase difference, the influence caused by the additional phase difference can be removed through a certain way to obtain the accurate phase difference.

[0010] In a possible implementation, the method further includes: compensating the phase difference based on the predetermined positional relationship.

[0011] In this way, since the additional phase difference existing in the phase difference can be accurately known based on the agreed position relationship, the phase difference can be compensated based on this, so that a more accurate phase difference after compensation is obtained.

[0012] In a possible implementation, the first RE and the second RE have the agreed position relationship, including: a time domain interval between the time domain position of the first RE and the time domain position of the second RE is an agreed time domain interval, and / or a frequency domain interval between the frequency domain position of the first RE and the frequency domain position of the second RE is an agreed frequency domain interval.

[0013] In this way, the time domain interval between the time domain position of the first RE and the time domain position of the second RE can be agreed, and / or the frequency domain interval between the frequency domain position of the first RE and the frequency domain position of the second RE can be agreed. It is equivalent to agreeing on the relative positions of the time domain and / or the frequency domain of the first RE and the second RE. In this way, the additional phase difference caused by the agreed position relationship can be accurately obtained. Even if there is an additional phase difference in the phase difference, since the additional phase difference is accurate, the influence caused by the additional phase difference can be removed in a certain way to obtain an accurate phase difference.

[0014] In a possible implementation, the first RE and the second RE have the agreed position relationship, including: the time domain position of the first RE and the time domain position of the second RE are agreed time domain positions, and / or the frequency domain position of the first RE and the frequency domain position of the second RE are agreed frequency domain positions.

[0015] In this way, the absolute positions of the time domain and / or the frequency domain of the first RE and the second RE can be agreed. In this way, the additional phase difference caused by the agreed position relationship can be accurately obtained. Even if there is an additional phase difference in the phase difference, since the additional phase difference is accurate, the influence caused by the additional phase difference can be removed in a certain way to obtain an accurate phase difference.

[0016] In a possible implementation, the above compensation of the phase difference based on the agreed position relationship includes: determining the time domain interval between the time domain position of the first RE and the time domain position of the second RE, and / or determining the frequency domain interval between the frequency domain position of the first RE and the frequency domain position of the second RE based on the agreed position relationship; and compensating the phase difference based on at least one of the time domain interval, the frequency domain interval, a time deviation, and a frequency deviation, the time deviation being a time deviation between the first device and the second device, and the frequency deviation being a frequency deviation between the first device and the second device.

[0017] In a possible implementation, the compensating for the phase difference based on at least one of the time domain interval, the frequency domain interval, the time offset, and the frequency offset comprises: determining a first phase difference compensation value based on the time domain interval and the frequency offset, and / or determining a second phase difference compensation value based on the frequency domain interval and the time offset; and compensating for the phase difference based on the first phase difference compensation value and / or the second phase difference compensation value.

[0018] In this manner, since the frequency offset accumulates in the time domain interval to cause an additional phase difference, the first phase difference compensation value can be determined based on the time domain interval and the frequency offset; and / or since the time offset accumulates in the frequency interval to cause an additional phase difference, the second phase difference compensation value can be determined based on the frequency interval and the time offset; and finally the phase difference can be compensated based on the determined first phase difference compensation value and / or the second phase difference compensation value. It should be understood that compensating for the phase difference can mean eliminating the additional phase difference caused by the above-mentioned conditions from the phase difference.

[0019] In a second aspect, an embodiment of the present application provides another communication method, which can be executed by a network device, can be executed by a component (for example, a processor, a chip, or a chip system, etc.) of the network device, can also be implemented by a logic module or software capable of implementing all or part of the network device. In the following, the communication method is taken as an example to be executed by the network device, and the network device includes a first device and a second device.

[0020] The communication method comprises: transmitting a first reference signal corresponding to the first device on a first resource, and transmitting a second reference signal corresponding to the second device on a second resource; receiving a phase difference, and a time offset and / or a frequency offset bound to the phase difference, the phase difference being associated with the first resource and / or the second resource, the time offset being a time offset between the first device and the second device, and the frequency offset being a frequency offset between the first device and the second device.

[0021] According to the method described in the second aspect, the network device can receive the phase difference, and the time offset and / or the frequency offset bound to the phase difference. The time offset and / or the frequency offset bound to the phase difference can indicate that the phase difference is a relatively accurate phase difference. For example, the phase difference received by the network device is a phase difference processed / compensated based on the bound time offset and / or frequency offset, and then the bound time offset and / or frequency offset can not only indicate that the phase difference is an accurate result after processing / compensation, but also indicate that it is the time offset and / or frequency offset used in processing / compensation.

[0022] In a possible implementation, the phase difference is determined according to channels on a first resource element (RE) and a second RE, the first RE belongs to the first resource, and the second RE belongs to the second resource.

[0023] In a possible implementation, the phase difference is a compensated phase difference.

[0024] In this way, the network device can directly receive the compensated phase difference, which is equivalent to that the phase difference is compensated by the terminal device and then sent to the network device.

[0025] In a possible implementation, the phase difference is a compensated phase difference, including: the phase difference is a compensated phase difference based on at least one of a time domain interval between a time domain position of the first RE and a time domain position of the second RE, a frequency domain interval between a frequency domain position of the first RE and a frequency domain position of the second RE, a time deviation, and a frequency deviation.

[0026] In this way, since the frequency deviation will accumulate in the time domain interval to cause an additional phase difference, and / or since the time deviation will accumulate in the frequency interval to cause an additional phase difference, the terminal device can compensate at least one of the time domain interval between the time domain position of the first RE and the time domain position of the second RE, the frequency domain interval between the frequency domain position of the first RE and the frequency domain position of the second RE, the time deviation, and the frequency deviation to obtain a compensated phase difference, and then send the compensated phase difference to the network device. It should be understood that the compensation of the phase difference can mean eliminating the additional phase difference caused by the above-mentioned situations from the phase difference, and therefore the phase difference received by the network device can also be understood as the phase difference after eliminating the additional phase difference.

[0027] In a possible implementation, the first RE and the second RE have a predetermined positional relationship.

[0028] In this way, the phase difference received by the network device means the phase difference determined by the terminal device based on the channels on the first RE and the second RE having the predetermined positional relationship. The first RE and the second RE having the predetermined positional relationship means that the first RE and the second RE have a predetermined positional relationship in the time domain and / or the frequency domain.

[0029] In a possible implementation, the first RE and the second RE have a predetermined positional relationship, including: a time domain interval between a time domain position of the first RE and a time domain position of the second RE is a predetermined time domain interval, and / or a frequency domain interval between a frequency domain position of the first RE and a frequency domain position of the second RE is a predetermined frequency domain interval.

[0030] In this way, the relative positions of the first RE and the second RE in the time domain and / or the frequency domain can be predetermined. In this way, the terminal device can determine the first RE from the first resource and determine the second RE from the second resource according to the predetermined relative positions in the time domain and / or the frequency domain, so as to obtain the phase difference based on the channels on the first RE and the second RE and compensate the phase difference.

[0031] In a possible implementation, the first RE and the second RE have an agreed position relationship, including: a time domain position of the first RE and a time domain position of the second RE are agreed time domain positions, and / or a frequency domain position of the first RE and a frequency domain position of the second RE are agreed frequency domain positions.

[0032] In this way, the absolute positions of the first RE and the second RE in the time domain and / or the frequency domain can be agreed, so that the terminal device can accurately determine the first RE from the first resource and the second RE from the second resource according to the agreed absolute positions in the time domain and / or the frequency domain, and obtain and compensate the phase difference based on the channels on the first RE and the second RE.

[0033] In a third aspect, an embodiment of the present application provides another communication method, which can be executed by a terminal device, can be executed by a component (for example, a processor, a chip, or a chip system) of the terminal device, can also be implemented by a logic module or software capable of implementing all or part of the terminal device. Hereinafter, the communication method is taken as an example for description.

[0034] The communication method includes: receiving a first reference signal corresponding to a first device on a first resource, and receiving a second reference signal corresponding to a second device on a second resource; and transmitting a phase difference, the phase difference being determined according to channels on a first resource element (RE) and a second RE, the first RE belonging to the first resource, the second RE belonging to the second resource, and the first RE and the second RE having an agreed position relationship.

[0035] According to the method described in the third aspect, the terminal device can determine the phase difference based on the channels on the first RE and the second RE and transmit the phase difference to the network device, the network device including the first device and the second device. Since the first RE and the second RE have an agreed position relationship, the network device can accurately know the affected part in the phase difference, that is, the additional phase difference. For example, the frequency deviation between the first device and the second device will accumulate in the time domain to cause the additional phase difference, and / or the time deviation between the first device and the second device will accumulate in the frequency domain to cause the additional phase difference. The first RE and the second RE have an agreed position relationship means that the first RE and the second RE have an agreed position relationship in the time domain and / or the frequency domain, so that the network device can accurately obtain the additional phase difference caused by the agreed position relationship. In this way, even if there is an additional phase difference in the phase difference, the influence caused by the additional phase difference can be removed through a certain way to obtain an accurate phase difference.

[0036] In a possible implementation, the first RE and the second RE have an agreed position relationship, including that a time domain interval between a time domain position of the first RE and a time domain position of the second RE is an agreed time domain interval, and / or a frequency domain interval between a frequency domain position of the first RE and a frequency domain position of the second RE is an agreed frequency domain interval.

[0037] In a possible implementation, the first RE and the second RE have an agreed position relationship, including that a time domain position of the first RE and a time domain position of the second RE are agreed time domain positions, and / or a frequency domain position of the first RE and a frequency domain position of the second RE are agreed frequency domain positions.

[0038] The beneficial effects of the various possible implementations in the third aspect can be referred to the corresponding description in the first aspect.

[0039] In a fourth aspect, an embodiment of the present application provides another kind of communication method, which can be executed by a terminal device, can also be executed by a component (for example, a processor, a chip, or a chip system, etc.) of the terminal device, can also be implemented by a logic module or software capable of implementing all or part of the terminal device. The following takes an example of the communication method executed by the terminal device.

[0040] The communication method comprises: receiving a first reference signal corresponding to a first device on a first resource, and receiving a second reference signal corresponding to a second device on a second resource; and transmitting a phase difference, and a time difference and / or a frequency difference bound with the phase difference according to the first resource and the second resource, the time difference being a time difference between the first device and the second device, and the frequency difference being a frequency difference between the first device and the second device.

[0041] According to the method described in the second aspect, the terminal device can transmit the phase difference, and the time difference and / or the frequency difference bound with the phase difference to the network device, the network device comprising the first device and the second device. Wherein, the time difference and / or the frequency difference bound with the phase difference can indicate that the phase difference is a relatively accurate phase difference. For example, the phase difference transmitted by the terminal device is a phase difference processed / compensated based on the bound time difference and / or frequency difference, then the bound time difference and / or frequency difference can not only indicate that the phase difference is an accurate result after processing / compensation, but also indicate that it is a time difference and / or frequency difference used in processing / compensation.

[0042] In a possible implementation, the transmitting the phase difference according to the first resource and the second resource comprises: determining the phase difference according to channels on a first resource element RE and a second resource element RE, the first RE belonging to the first resource, and the second RE belonging to the second resource; and transmitting the phase difference.

[0043] In a possible implementation, the phase difference is a compensated phase difference.

[0044] In a possible implementation, the communication method further includes compensating for at least one of a time domain interval between the time domain position of the first RE and the time domain position of the second RE, a frequency domain interval between the frequency domain position of the first RE and the frequency domain position of the second RE, a time offset, and a frequency offset.

[0045] In a possible implementation, the compensation based on at least one of the time domain interval, the frequency domain interval, the time offset, and the frequency offset includes: determining a first phase difference compensation value based on the time domain interval and the frequency offset, and / or determining a second phase difference compensation value based on the frequency domain interval and the time offset; and compensating based on the first phase difference compensation value and / or the second phase difference compensation value.

[0046] In a possible implementation, the first RE and the second RE have an agreed position relationship.

[0047] In a possible implementation, the first RE and the second RE have the agreed position relationship, including that a time domain interval between the time domain position of the first RE and the time domain position of the second RE is an agreed time domain interval, and / or a frequency domain interval between the frequency domain position of the first RE and the frequency domain position of the second RE is an agreed frequency domain interval.

[0048] In a possible implementation, the first RE and the second RE have the agreed position relationship, including that the time domain position of the first RE and the time domain position of the second RE are agreed time domain positions, and / or the frequency domain position of the first RE and the frequency domain position of the second RE are agreed frequency domain positions.

[0049] The beneficial effects of the various possible implementations in the fourth aspect can be referred to the corresponding description in the second aspect.

[0050] In the fifth aspect, the embodiments of the present application provide a communication device, including units for performing the methods in the first aspect to the fourth aspect and any possible implementation thereof.

[0051] In the sixth aspect, the embodiments of the present application provide another communication device, including a processor and an interface circuit, the interface circuit is configured to receive a signal from another communication device and transmit the signal to the processor or send a signal from the processor to another communication device, and the processor is configured to implement the methods in the first aspect to the fourth aspect and any possible implementation thereof through a logic circuit or an execution code instruction.

[0052] In the seventh aspect, the present application provides a computer readable storage medium, the storage medium stores a computer program or instructions, when the computer program or instructions are executed by a communication device, the methods in the first aspect to the fourth aspect and any possible implementation thereof are implemented.

[0053] In an eighth aspect, the present application provides a computer program product, computer programs or instructions which, when executed by a communication device, implement the method of the first aspect to the fourth aspect, and any possible implementation thereof. BRIEF DESCRIPTION OF DRAWINGS

[0054] Fig. 1 is a schematic diagram of an architecture of a communication system according to an embodiment of the present application;

[0055] Fig. 2 is a schematic diagram of an architecture of another communication system according to an embodiment of the present application;

[0056] Fig. 3 is a schematic diagram of a flow of a first communication method according to an embodiment of the present application;

[0057] Fig. 4 is a schematic diagram of an agreement between a position of a first RE and a position of a second RE according to an embodiment of the present application;

[0058] Fig. 5 is a schematic diagram of a flow of a second communication method according to an embodiment of the present application;

[0059] Fig. 6 is a schematic diagram of a flow of a communication method according to an embodiment of the present application;

[0060] Fig. 7 is a schematic diagram of a structure of a communication device according to an embodiment of the present application;

[0061] Fig. 8 is a schematic diagram of a structure of another communication device according to an embodiment of the present application. DETAILED DESCRIPTION

[0062] In order to facilitate understanding of the technical scheme of the present application, the present application will be further described below with reference to the drawings.

[0063] The embodiments of the present application can be applied to various communication systems, for example, a 5th generation (5G) or new radio (NR) system, a long term evolution (LTE) system, an LTE frequency division duplex (FDD) system, an LTE time division duplex (TDD) system, and the like. The embodiments of the present application can also be applied to a future communication system, such as a 6th generation (6G) mobile communication system. The technical solutions provided in the present application can also be applied to device to device (D2D) communication, vehicle-to-everything (V2X) communication, machine to machine (M2M) communication, machine type communication (MTC), and an internet of things (IoT) communication system or other communication systems.

[0064] FIG. 1 shows an architecture schematic diagram of a communication system provided by the embodiments of the present application. As shown in FIG. 1, the communication system includes a device 110 and a device 120. It should be noted that the communication system can also include other devices, and the embodiments of the present application do not limit this.

[0065] Among them, the device 110 refers to a communication device used for managing or scheduling the device 120, and the device 120 refers to a communication device for transmitting data and / or information according to the scheduling of the device 110, such as uplink and / or downlink data and / or information transmission.

[0066] Exemplarily, the device 110 can be a network device, and the device 120 can be a terminal device, but is not limited thereto. The embodiments of the present application take the device 110 as a network device and the device 120 as a terminal device as an example for description.

[0067] A network device is a device that connects terminal devices to a wireless network. The network device can be a node in a wireless access network, also referred to as a base station, and can also be referred to as a radio access network (RAN) node (or device). The base station can be a distributed antenna system, and a radio frequency head end of the base station can communicate with a terminal device. For example, the network device can include an evolved Node B (eNB or eNodeB) in an LTE system or an LTE-Advanced (LTE-A) system, such as a conventional macro base station eNB and a micro base station eNB in a heterogeneous network scenario; or can include a next generation Node B (gNB) in a 5G system, or can include a transmission reception point (TRP), a home base station (for example, a home evolved Node B or a home Node B, HNB), a baseband unit (BBU), a BBU pool, or a wireless fidelity (Wi-Fi) access point (AP), and the like; or can be a base station device in 5G or a network device in a future evolved public land mobile network (PLMN); or can be a wearable device or a vehicle-mounted device, and the like; or can include a centralized unit (CU) and a distributed unit (DU); or can include a network device in a non-terrestrial network (NTN), that is, can be deployed on a high-altitude platform or a satellite, and embodiments of the present application are not limited.

[0068] A terminal device, also referred to as a user equipment (UE), a mobile station (MS), a mobile terminal (MT), etc. A terminal device is a device including a wireless communication function (providing voice / data connectivity to a user). For example, a handheld device having a wireless connection function, or a vehicle-mounted device, etc. For example, a terminal device can be a mobile phone, a tablet computer, a notebook computer, a palm computer, a mobile internet device (MID), a wearable device, a virtual reality (VR) device, an augmented reality (AR) device, a wireless terminal in industrial control, a wireless terminal in Internet of Vehicles, a wireless terminal in self driving, a wireless terminal in remote medical surgery, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, or a wireless terminal in smart home, etc.

[0069] In some embodiments, a network device includes a plurality of devices, as shown in FIG. 2, the network device includes two devices, which are a first device and a second device. The first device and the second device can be any type of network device mentioned above, such as the first device and the second device being TRPs, or the first device and the second device being eNBs, or the first device and the second device being gNBs, etc.

[0070] The first device and the second device can simultaneously provide services for a terminal device, for example, the terminal device can simultaneously perform uplink and downlink transmission with the first device and the second device. Uplink transmission refers to that the terminal device sends uplink information to the first device / second device, and the uplink information includes one or more of uplink data, uplink control information or reference signal (RS). Downlink transmission refers to that the first device / second device sends downlink information to the terminal device, and the downlink information includes one or more of downlink data, downlink control information or RS. A channel used for uplink transmission is referred to as an uplink channel, and a channel used for downlink transmission is referred to as a downlink channel. Meanwhile, the first device and the second device can exchange information.

[0071] In some embodiments, the first device and the second device can adopt a coherent transmission mode or a non-coherent transmission mode to perform downlink transmission with the terminal device. The non-coherent transmission mode refers to that the first device and the second device independently adopt corresponding precoding matrices to precode downlink data when transmitting the downlink data to the terminal device, and the corresponding precoding matrices are independently determined based on the channels between the first device and the terminal device and the second device and the terminal device, respectively. The coherent transmission mode refers to that the first device and the second device jointly select a precoding matrix to precode downlink data according to a joint channel between the first device and the terminal device and the second device and the terminal device, so that the downlink data from the first device and the downlink data from the second device are in-phase superimposed when reaching the terminal device, thereby improving transmission performance.

[0072] In order to facilitate understanding of the scheme provided by the embodiments of the present application, the related concepts involved in the embodiments of the present application are introduced as follows:

[0073] (1) Phase difference between uplink channel and downlink channel

[0074] In the architecture diagram shown in FIG. 2, the uplink channel of the first device or the second device is not exactly equal to the downlink channel, but at least differs by a phase factor. For example, when the uplink channel is represented as h, the downlink channel can be represented as he jθ The uplink channel of the first device is h1, and the downlink channel of the first device can be represented as The uplink channel of the second device is h2, and the downlink channel of the second device can be represented as

[0075] In the coherent transmission mode introduced above, the first device and the second device need to jointly select a precoding matrix based on and , that is, precode based on . Further, the same phase factor can be extracted from and . Considering that the same phase factor does not affect the performance of precoding, the first device and the second device can jointly precode based on , that is, after learning the value of θ1-θ2, precoding can be performed.

[0076] (2) Time offset

[0077] The time deviation is also referred to as timing offset or time offset. In the architecture diagram shown in FIG. 2, the time deviation between the first device and the second device can be caused by one or more of the following factors, but is not limited thereto: ①, the first device and the second device generate signals by using local oscillators, and due to differences in process and material of the local oscillators and environmental factors, the signals generated by the first device and the second device have clock deviations. ②, there are differences in processing time of the signals generated by the first device and the second device inside the devices. ③, the first device and the second device are located at different positions, resulting in different transmission paths of the terminal device, and thus there are differences in transmission time delay corresponding to the first device and the second device.

[0078] (3) Frequency deviation

[0079] The frequency deviation is also referred to as frequency offset or frequency offset. In the architecture diagram shown in FIG. 2, the frequency deviation between the first device and the second device refers to the difference in frequency of the signals transmitted or received by the first device and the second device. The frequency deviation between the first device and the second device can be caused by one or more of the following factors, but is not limited thereto: ①, the first device and the second device generate clock signals by using local oscillators, and due to differences in process and material of the local oscillators and environmental factors, the signals generated by the first device and the second device have frequency deviations. ②, due to the influence of multipath propagation, the signals generated or received by the first device and the second device can be affected by different degrees of frequency fading. ③, due to the influence of Doppler effect, the first device and the second device can cause signal frequency deviation due to device movement, and the device movement can refer to one or more of the first device, the second device or the terminal device.

[0080] (4) Influence of time deviation and / or frequency deviation on channel measurement

[0081] In the above content, the first device and the second device can jointly perform precoding based on the value of θ1-θ2. Wherein, θ1 is a phase factor (or phase difference) between the uplink channel and the downlink channel of the first device, when the phase of the uplink channel of the first device is θ 1,UL and the phase of the downlink channel is θ 1,DL , θ1=θ 1,DL -θ 1,UL . θ2 is a phase factor (or phase difference) between the uplink channel and the downlink channel of the second device, when the phase of the uplink channel of the second device is θ 2,UL and the phase of the downlink channel is θ 2,DL , θ2=θ 2,DL -θ 2,UL . That is, θ1-θ2=θ 1,DL -θ 1,UL -(θ 2,DL -θ2,UL ) = (θ 1,DL - θ 2,DL ) - (θ 1,UL - θ 2,UL ).

[0082] wherein (θ 1,DL - θ 2,DL ) is the phase difference between the downlink channel of the first device and the downlink channel of the second device. (θ 1,UL - θ 2,UL ) is the phase difference between the uplink channel of the first device and the uplink channel of the second device. Thus, θ1- θ2may be determined by the difference between the phase difference of the downlink channel and the phase difference of the uplink channel.

[0083] According to the principle, the terminal device can first receive the downlink reference signal of the first device and the downlink reference signal of the second device respectively, measure the downlink channel of the first device based on the downlink reference signal of the first device, measure the downlink channel of the second device based on the downlink reference signal of the second device, and then obtain the phase difference between the downlink channels of the first device and the second device based on the downlink channel of the first device and the downlink channel of the second device. After obtaining the phase difference between the downlink channels of the first device and the second device, the terminal device can report to the first device and / or the second device.

[0084] Meanwhile, the terminal device can send corresponding uplink reference signals to the first device and the second device respectively, the first device determines the uplink channel of the first device based on the received uplink reference signal, and the second device determines the uplink channel of the second device based on the received uplink reference signal. Then, the first device and the second device interact information to determine the phase difference between the uplink channels of the first device and the second device.

[0085] After the first device and / or the second device obtain the phase difference between the downlink channels of the first device and the second device, and the phase difference between the uplink channels of the first device and the second device, the difference between the phase difference of the downlink channel and the phase difference of the uplink channel can be used to determine θ1- θ2.

[0086] It should be understood that the downlink reference signal of the first device is carried on the corresponding downlink resource of the first device, and the downlink reference signal of the second device is carried on the corresponding downlink resource of the second device; the uplink reference signal corresponding to the first device is carried on the uplink resource corresponding to the first device, and the uplink reference signal corresponding to the second device is carried on the uplink resource corresponding to the second device.

[0087] The downlink resource / uplink resource corresponding to the first device and the downlink resource / uplink resource corresponding to the second device can include a plurality of resource elements (REs).

[0088] Optionally, the determining the downlink phase difference between the first device and the second device can be understood as measuring the phase difference of the downlink channels on two REs / pairs of REs, which respectively belong to the downlink resources corresponding to the first device and the downlink resources corresponding to the second device, i.e., the two REs / pairs of REs respectively correspond to the first device and the second device.

[0089] Optionally, the determining the downlink phase difference between the first device and the second device can also be understood as measuring the phase difference of the downlink channels on multiple pairs of REs, and performing a merging process (such as taking an average, which is not limited in the embodiments of the present application) to obtain the final downlink channel phase difference. It should be understood that each pair of REs in the multiple pairs of REs respectively belongs to the downlink resources corresponding to the first device and the downlink resources corresponding to the second device, i.e., each pair of REs respectively corresponds to the first device and the second device.

[0090] Since the first device and the second device can have a time offset and / or a frequency offset, the time offset can cause the channel of the first device and the channel of the second device to have a large frequency selective fading, i.e., accumulation in the frequency domain causes an additional phase difference between the channels. The frequency offset can cause the channel of the first device and the channel of the second device to have a large time selective fading, i.e., accumulation in the time domain causes an additional phase difference between the channels. Therefore, when the relative positions of the two REs for measuring the channel phase difference are different, the influence of the time offset and / or the frequency offset on the channel phase difference is different. For example, when the time offset is fixed, if the frequency domain relative positions of the two REs are larger, e.g., the subcarrier spacing corresponding to the two REs is larger, then the additional phase difference caused by the accumulation of the time offset in the frequency domain is more, thereby causing the measured channel phase difference to be larger. Similarly, when the frequency offset is fixed, if the time domain relative positions of the two REs are larger, e.g., the time interval of the two REs is larger, then the additional phase difference caused by the accumulation of the frequency offset in the time domain is more, thereby causing the measured channel phase difference to be larger. It should be understood that the time offset and / or the frequency offset can cause the measured uplink channel phase difference to be larger, the measured downlink channel phase difference to be larger, or both the measured uplink channel phase difference and the measured downlink channel phase difference to be larger.

[0091] Therefore, it can be seen that the time offset and / or the frequency offset can cause the phase difference between the channels of the first device and the second device to be inaccurate.

[0092] In order to make the phase difference between the channels of the first device and the second device more accurate, the embodiments of the present application provide two communication methods, which will be described in detail as follows:

[0093] The first kind: Fig. 3 shows a flowchart of a first communication method provided by the embodiment of the application. The execution subject of the communication method can be a terminal device and a network device, or the subject can be a chip in the terminal device and a chip in the network device, or the subject can also be other types of devices other than the network device and the terminal device, and those skilled in the art can further expand according to the content disclosed in the specification. The execution subject of the communication method shown in Fig. 3 and the following embodiments is taken as an example of a terminal device and a network device, wherein the network device can be the device 110 shown in Fig. 1, and the network device includes the first device and the second device shown in Fig. 2, and the terminal device can be the device 120 shown in Fig. 1. As shown in Fig. 3, the method includes steps 301 to 302. Wherein:

[0094] 301. The network device sends a first reference signal corresponding to the first device to the terminal device on a first resource, and sends a second reference signal corresponding to the second device to the terminal device on a second resource. Correspondingly, the terminal device receives the first reference signal and the second reference signal.

[0095] Wherein, the first resource is a time-frequency resource occupied by the first reference signal, and the second resource is a time-frequency resource occupied by the second reference signal, the first reference signal is used to estimate the downlink channel between the first device and the terminal device, and the second reference signal is used to estimate the downlink channel between the second device and the terminal device.

[0096] In a possible implementation, the network device sends the first reference signal corresponding to the first device to the terminal device on the first resource, which can be understood as that the first device sends the first reference signal to the terminal device on the first resource; and the network device sends the second reference signal corresponding to the second device to the terminal device on the second resource, which can be understood as that the second device sends the second reference signal to the terminal device on the second resource.

[0097] For example, the first reference signal and the second reference signal can be one or more of a channel state information reference signal (CSI-RS), a demodulation reference signal (DMRS) of a physical downlink shared channel (PDSCH), a demodulation reference signal or a phase-tracking reference signal (PT-RS) of a physical downlink control channel (PDCCH), etc.

[0098] In a possible implementation, before step 301, the network device can further configure, for the terminal device, time-frequency resources occupied by the first reference signal and the second reference signal, that is, configure the first resource and the second resource.

[0099] Optionally, the configuration information of the first resource or the second resource can include time domain configuration information. For example, the time domain configuration information includes but is not limited to one or more of the following: a time period in time slots, a time slot offset position in the time period, a symbol position of the time slot, and the like.

[0100] Optionally, the configuration information of the first resource or the second resource can include frequency domain configuration information. For example, the frequency domain configuration information includes but is not limited to one or more of the following: a starting resource block (RB), a number of RBs, a frequency domain density (a number of REs in each RB), and an offset configuration of the RE in the RB, and the like.

[0101] 302. The terminal device sends, to the network device, a phase difference, the phase difference being determined based on channels on a first RE and a second RE, the first RE belonging to the first resource, the second RE belonging to the second resource, and the first RE and the second RE having a predetermined positional relationship. Correspondingly, the network device receives the phase difference.

[0102] It should be understood that the RE pair used to calculate the phase difference can have one pair or multiple pairs, which is not limited by the embodiments of the present application.

[0103] Optionally, when the RE used to calculate the phase difference has only one pair, one RE in the pair is from the first resource, that is, the first RE, and the other RE is from the second resource, that is, the second RE, and the two REs have a predetermined positional relationship.

[0104] Optionally, when the RE used to calculate the phase difference has multiple pairs, each pair of the multiple pairs includes two REs, one RE in the pair is from the first resource, and the other RE is from the second resource, and the two REs have a predetermined positional relationship. Optionally, the number of the first RE and the second RE can be multiple, for example, the first RE includes multiple REs from the first resource, and the second RE includes multiple REs from the second resource. At this time, it can also be said that the first RE and the second RE form multiple pairs of REs. Alternatively, the number of the first RE is 1, and the number of the second RE is also 1, and the pair of REs formed by the first RE and the second RE can be any one of the multiple pairs of REs. The first RE is the RE from the first resource in the pair, the second RE is the RE from the second resource in the pair, and the first RE and the second RE have a predetermined positional relationship.

[0105] In the embodiments of the present application, optionally, the terminal device can first determine the first RE and the second RE, then determine the phase difference based on the channels on the first RE and the second RE, and finally send the phase difference to the network device.

[0106] In a possible implementation, the terminal device can determine the first RE from the first resource and the second RE from the second resource based on the configuration information of the first resource and the second resource and the agreed position relationship between the first RE and the second RE.

[0107] Exemplarily, the first resource is denoted as Rs resource and the second resource is denoted as Rsref resource, the first Rs resource unit can be determined from the Rs resource and the first Rsref resource unit can be determined from the Rsref resource based on the agreed position relationship, and the first Rs resource unit and the first Rsref resource unit have the agreed position relationship; at the same time, the second Rs resource unit can be determined from the Rs resource and the second Rsref resource unit can be determined from the Rsref resource, and the second Rs resource unit and the second Rsref resource unit also have the agreed position relationship. Optionally, the first RE includes the first Rs resource unit and the second Rs resource unit, and the second RE includes the first Rsref resource unit and the second Rsref resource unit, at this time, the first RE and the second RE have the agreed position relationship, which can be understood as that the first Rs resource unit and the first Rsref resource unit have the agreed position relationship, and the second Rs resource unit and the second Rsref resource unit also have the agreed position relationship; or optionally, the first RE is the first Rs resource unit and the second RE is the first Rsref resource unit; or optionally, the first RE is the second Rs resource unit and the second RE is the second Rsref resource unit.

[0108] Optionally, the agreed position relationship can be configured by the network device to the terminal device, that is, the network device sends indication information to the terminal device to indicate the above-mentioned agreed position relationship.

[0109] Or, optionally, the agreed position relationship can also be indicated by the terminal device to the network device, that is, the terminal device sends indication information to the network device to indicate the above-mentioned agreed position relationship.

[0110] Or, optionally, the agreed position relationship can also be predefined by a protocol, etc., which is not limited in the present application.

[0111] Optionally, the first RE and the second RE having the agreed position relationship can also be understood as that the first RE and the second RE having the agreed mapping relationship, or the first RE and the second RE having the agreed corresponding relationship, etc., which is not limited in the present application.

[0112] The following describes several manners of the agreed position relationship:

[0113] It should be understood that alternatively, the first RE and the second RE have the agreed position relationship, which can be understood as that in the multiple pairs of REs composed of the first RE and the second RE, the two REs in each pair of REs have the agreed position relationship; or understood as that the first RE and the second RE in each pair of REs have the agreed position relationship.

[0114] Manner one: the first RE and the second RE have the agreed position relationship, which means that the time domain interval between the time domain position of the first RE and the time domain position of the second RE is the agreed time domain interval, and / or the frequency domain interval between the frequency domain position of the first RE and the frequency domain position of the second RE is the agreed frequency domain interval.

[0115] Alternatively, manner one can also be understood as that in the multiple pairs of REs composed of the first RE and the second RE, the time domain interval of the two REs in each pair of REs is the agreed time domain interval, and / or the frequency domain interval of the two REs in each pair of REs is the agreed frequency domain interval.

[0116] The time domain interval between the time domain position of the first RE and the time domain position of the second RE can be understood as the time domain relative position of the first RE and the second RE, or understood as the time domain relative position of the two REs in each pair of REs in the multiple pairs of REs composed of the first RE and the second RE; the frequency domain interval between the frequency domain position of the first RE and the frequency domain position of the second RE can be understood as the frequency domain relative position of the first RE and the second RE, or understood as the frequency domain relative position of the two REs in each pair of REs in the multiple pairs of REs composed of the first RE and the second RE.

[0117] Therefore, alternatively, manner one can also be understood as agreeing on the time domain relative position of the first RE and the second RE; or agreeing on the frequency domain relative position of the first RE and the second RE; or agreeing on both the time domain relative position of the first RE and the second RE and the frequency domain relative position of the first RE and the second RE.

[0118] Alternatively, manner one can also be understood as that in the multiple pairs of REs composed of the first RE and the second RE, the time domain relative position of the two REs in each pair of REs is agreed; or the frequency domain relative position of the two REs in each pair of REs is agreed; or both the time domain relative position of the two REs in each pair of REs and the frequency domain relative position of the two REs in each pair of REs are agreed.

[0119] For example, assuming that the first resource includes l time domain resources and k frequency domain resources, the time domain resources are in time domain symbols, and the frequency domain resources are in subcarriers, the first resource can be understood as including l*k REs, and the number of the time domain resource corresponding to one RE in the first resource can be [0, l-1], and the number of the frequency domain resource corresponding to the RE can be [0, k-1]. Similarly, assuming that the second resource includes L time domain resources and K frequency domain resources, the time domain resources are in symbols, and the frequency domain resources are in subcarriers, the second resource can be understood as including L*K REs, and the number of the time domain resource corresponding to one RE in the second resource (i.e., the time domain position) can be [0, L-1], and the number of the frequency domain resource corresponding to the RE (i.e., the frequency domain position) can be [0, K-1]. Assuming that the number of the time domain resource corresponding to the RE determined from the first resource is l1, and the number of the frequency domain resource corresponding to the RE is k1, that is, the RE is represented as (l1, k1); the number of the time domain resource corresponding to the RE determined from the second resource is L1, and the number of the frequency domain resource corresponding to the RE is K1, that is, the RE is represented as (L1, K1); at this time, the first RE can be understood as (l1, k1), and the second RE can be understood as (L1, K1).

[0120] Alternatively, another RE (l2, k2) can be determined from the first resource, and another RE (L2, K2) can be determined from the second resource; at this time, the first RE can be understood as (l2, k2), and the second RE can be understood as (L2, K2).

[0121] Alternatively, the first RE can include (l1, k1) and (l2, k2), and the second RE can include (L1, K1) and (L2, K2).

[0122] According to the first mode, the time domain interval between the time domain position of the first RE and the time domain position of the second RE can be agreed as T rs -T rsref , that is, T rs -T rsref is a predetermined value, for example, T rs -T rsref can be understood as the interval of the time domain resource numbers, and l1-L1=l2-L2=T rs -T rsref .

[0123] Alternatively, the frequency domain interval between the frequency domain position of the first RE and the frequency domain position of the second RE can be agreed as K rs -K rsref , that is, K rs -K rsref is a predetermined value, for example, K rs -K rsref can be understood as the interval of the frequency domain resource numbers, and k1-K1=k2-K2=K rsK rsref .

[0124] Alternatively, the time domain interval between the time domain position of the first RE and the time domain position of the second RE can be agreed as T rs T rsref , and the frequency domain interval between the frequency domain position of the first RE and the frequency domain position of the second RE is K rs K rsref , i.e., T rs T rsref , and K rs K rsref are agreed values. Then, l1-L1=l2-L2=T rs T rsref , and k1-K1=k2-K2=K rs K rsref .

[0125] It should be understood that the above-mentioned numbering of time domain resources has a corresponding relationship with the index of time domain symbols, and the above-mentioned numbering of frequency domain resources also has a corresponding relationship with the index of subcarriers, so the first RE and the second RE can also be directly expressed in corresponding time domain symbol indexes and corresponding subcarrier indexes. Alternatively, the time interval can be understood as the interval of time domain symbol indexes, and the frequency interval can be understood as the interval of subcarrier indexes.

[0126] It should be understood that the above-mentioned time domain interval and frequency domain interval are only exemplified by two RE pairs, and in specific implementation, each RE pair in multiple RE pairs satisfies the above-mentioned formula.

[0127] The second mode: the first RE and the second RE have an agreed position relationship, including: the time domain position of the first RE and the time domain position of the second RE are agreed time domain positions, and / or, the frequency domain position of the first RE and the frequency domain position of the second RE are agreed frequency domain positions.

[0128] Wherein, the time domain / frequency domain position of the first RE / second RE refers to the absolute position of the time domain / frequency domain of the first RE / second RE, for example, the specific value of the numbering of the time domain / frequency domain resource corresponding to the first RE / second RE. Then the second mode can also be understood as agreeing on the time domain absolute position of the first RE and the time domain absolute position of the second RE; or agreeing on the frequency domain absolute position of the first RE and the frequency domain absolute position of the second RE; or agreeing on the time-frequency domain absolute position of the first RE and the time-frequency domain absolute position of the second RE.

[0129] Still taking the example in the manner one as an example, in the manner two, the specific values of l1 and L1, and the specific values of l2 and L2 can be agreed; or, the specific values of k1 and K1, and the specific values of k2 and K2 can be agreed; or, the specific values of l1 and L1, l2 and L2, k1 and K1, and k2 and K2 can be agreed.

[0130] Optionally, it can also be understood that the specific values of the time domain symbol indexes of the first RE and the second RE in each pair of REs are agreed; or, the specific values of the subcarrier indexes of the first RE and the second RE in each pair of REs are agreed; or, the specific values of the time domain symbol indexes and the subcarrier indexes of the first RE and the second RE in each pair of REs are agreed.

[0131] Optionally, the specific values of the time slots where the first RE and the second RE in each pair of REs are located, and / or the specific values of the subframes where the first RE and the second RE in each pair of REs are located, and the like, can also be agreed. The present application does not limit this.

[0132] Optionally, in the above agreement, the time domain intervals of each pair of REs in the multiple pairs of REs are the same, and / or the frequency domain intervals of each pair of REs are the same.

[0133] For example, as shown in FIG. 4, the left side of FIG. 4 shows the first resource, and the right side shows the second resource. The first resource occupies symbols 3 to 6 on time slot n and occupies subcarriers 0 to 11. The second resource occupies symbols 0 to 3 on time slot m and occupies subcarriers 0 to 11. Assuming that the arrows represent a pair of REs with an agreed positional relationship, then the time slot index of the first RE in the first pair of REs is “n”, the time domain symbol index is “3”, and the subcarrier index is “0”. The time slot index of the second RE in the first pair of REs is “m”, the time domain symbol index is “0”, and the subcarrier index is “2”. The time slot index of the first RE in the second pair of REs is “n”, the time domain symbol index is “3”, and the subcarrier index is “4”. The time slot index of the second RE in the second pair of REs is “m”, the time domain symbol index is “0”, and the subcarrier index is “6”. The time slot index of the first RE in the third pair of REs is “n”, the time domain symbol index is “3”, and the subcarrier index is “8”. The time slot index of the second RE in the third pair of REs is “m”, the time domain symbol index is “0”, and the subcarrier index is “10”.

[0134] Manner three: the first RE and the second RE have an agreed positional relationship, including that the time domain interval between the time domain position of the first RE and the time domain position of the second RE is an agreed time domain interval, and the frequency domain position of the first RE and the frequency domain position of the second RE are agreed frequency domain positions.

[0135] The time domain interval between the time domain position of the first RE and the time domain position of the second RE is the agreed time domain interval, which can be seen in the related description in mode one; the frequency domain position of the first RE and the frequency domain position of the second RE are the agreed frequency domain positions, which can be seen in the related description in mode two.

[0136] In mode three, the time domain relative position of the first RE and the second RE can be agreed, and the frequency domain absolute position of the first RE and the time domain absolute position of the second RE are agreed.

[0137] Still taking the example in mode one as an example, in mode three, the time domain interval between the time domain position of the first RE and the time domain position of the second RE can be agreed as T rs -T rsref , and l1-L1=l2-L2=T rs -T rsref ; meanwhile, the specific values of k1 and K1 and k2 and K2 can be agreed, or it can be understood that the specific values of the subcarrier indexes of the first RE and the second RE in each pair of REs are agreed.

[0138] Mode four: the first RE and the second RE have an agreed position relationship, including: the frequency domain interval between the frequency domain position of the first RE and the frequency domain position of the second RE is an agreed frequency domain interval, and the time domain position of the first RE and the time domain position of the second RE are agreed time domain positions.

[0139] The frequency domain interval between the frequency domain position of the first RE and the frequency domain position of the second RE is the agreed frequency domain interval, which can be seen in the related description in mode one. The time domain position of the first RE and the time domain position of the second RE are the agreed time domain positions, which can be seen in the related description in mode two.

[0140] In mode four, the frequency domain relative position of the first RE and the second RE can be agreed, and the frequency domain absolute position of the first RE and the time domain absolute position of the second RE are agreed.

[0141] Still taking the example in mode one as an example, in mode four, the frequency domain interval between the frequency domain position of the first RE and the frequency domain position of the second RE can be agreed as K rs -K rsref , and k1-K1=k2-K2=K rs -K rsref ; meanwhile, the specific values of l1 and L1 and l2 and L2 can be agreed, or it can be understood that the specific values of the time domain symbol indexes, time slot indexes and / or subframe indexes of the first RE and the second RE in each pair of REs are agreed.

[0142] After determining the multiple pairs of REs according to the above manner, the terminal device can calculate a phase difference for each pair of REs. Taking a pair of REs as an example: the terminal device measures a first reference signal on a first RE in the pair of REs to obtain a phase of a downlink channel between the first device and the terminal device; and the terminal device measures a second reference signal on a second RE in the pair of REs to obtain a phase of a downlink channel between the second device and the terminal device; then the terminal device determines a difference between the phase of the downlink channel between the first device and the terminal device and the phase of the downlink channel between the second device and the terminal device. For example, h rsref represents a channel on the first RE in the pair of REs, or a downlink channel between the first device and the terminal device;h rs represents a channel on the second RE in the pair of REs, or a downlink channel between the second device and the terminal device. Optionally, the terminal device can obtain the phase difference based on to obtain the phase difference value, and phase() is an operation for obtaining a difference in phase.

[0143] Optionally, the terminal device can obtain the difference values calculated for the multiple pairs of REs, and then perform a merging process on the difference values to obtain a phase difference and send the phase difference to the network device. For example, the merging process can be a merging process on phase differences in a sub-band to obtain a sub-band phase difference, or a merging process on phase differences in a full bandwidth to obtain a wideband phase difference, and the like.

[0144] In a possible implementation, the phase difference sent by the terminal device to the network device can or can not include an additional phase difference caused by a time difference and / or a frequency difference.

[0145] wherein the time difference is a time difference between the first device and the second device, and the frequency difference is a frequency difference between the first device and the second device. It should be understood that the time difference and the frequency difference can be variable. Optionally, the time difference and the frequency difference herein refer to corresponding time difference and frequency difference when the first device sends the first reference signal and the second device sends the second reference signal.

[0146] For example, in the agreed position relationship, a time domain interval T rs -T rsref is agreed to be 0, i.e., the time domain position of the first RE is agreed to be the same as the time domain position of the second RE; or a frequency domain interval K rs -K rsrefThe phase difference sent by the terminal device to the network device can not include an additional phase difference caused by the time difference and / or the frequency difference, if the frequency domain position of the first RE and the frequency domain position of the second RE are agreed to be the same frequency domain position.

[0147] Optionally, if the phase difference sent by the terminal device to the network device includes an additional phase difference caused by the time difference and / or the frequency difference, the network device can compensate the phase difference based on the agreed position relationship to obtain an accurate phase difference of the downlink channel between the first device and the second device.

[0148] In a possible manner, the manner in which the network device compensates the phase difference based on the agreed position relationship specifically includes: determining a time domain interval between the time domain position of the first RE and the time domain position of the second RE, and / or determining a frequency domain interval between the frequency domain position of the first RE and the frequency domain position of the second RE, based on the agreed position relationship; and compensating the phase difference based on at least one of the time domain interval, the frequency domain interval, the time difference and the frequency difference.

[0149] Optionally, the time domain interval between the time domain position of the first RE and the time domain position of the second RE can be understood as a time domain interval between the time domain positions of each pair of REs in a plurality of pairs of REs composed of the first RE and the second RE.

[0150] Optionally, the frequency domain interval between the frequency domain position of the first RE and the frequency domain position of the second RE can be understood as a frequency domain interval between the frequency domain positions of each pair of REs in a plurality of pairs of REs composed of the first RE and the second RE.

[0151] For example, if the agreed position relationship is the above-mentioned manner one or manner three, the time domain interval between the time domain position of the first RE and the time domain position of the second RE is the agreed time interval, and if the agreed position relationship is the above-mentioned manner two or manner four, the time domain interval between the time domain position of the first RE and the time domain position of the second RE needs to be determined according to the agreed time domain position of the first RE and the agreed time domain position of the second RE.

[0152] If the agreed position relationship is the above-mentioned manner one or manner four, the frequency domain interval between the frequency domain position of the first RE and the frequency domain position of the second RE is the agreed frequency domain interval, and if the agreed position relationship is the above-mentioned manner two or manner three, the frequency domain interval between the frequency domain position of the first RE and the frequency domain position of the second RE needs to be determined according to the agreed frequency domain position of the first RE and the agreed frequency domain position of the second RE.

[0153] In a possible implementation, the network device compensates the phase difference based on at least one of the time domain interval, the frequency domain interval, the time offset, and the frequency offset, including: determining a first phase difference compensation value based on the time domain interval and the frequency offset, and / or determining a second phase difference compensation value based on the frequency domain interval and the time offset; and compensating the phase difference based on the first phase difference compensation value and / or the second phase difference compensation value.

[0154] For example, assume that the time offset is represented as Δt rs -Δt rsref , and the frequency offset is represented as Δf rs -Δf rsref . Then the first phase difference compensation value can be represented as Formula 1 below, and the second phase difference compensation value can be represented as Formula 2 below:

[0155] In Formula 1, T rs -T rsref represents the time domain interval obtained by the network device based on the agreed position relationship, and in Formula 2, K rs -K rsref represents the frequency domain interval obtained by the network device based on the agreed position relationship.

[0156] Optionally, if the time domain interval obtained by the network device is 0 and the frequency domain interval is not 0, the network device determines only the second phase difference compensation value based on Formula 2; if the time domain interval obtained by the network device is not 0 and the frequency domain interval is 0, the network device determines only the first phase difference compensation value based on Formula 1; if the time domain interval obtained by the network device is not 0 and the frequency domain interval is not 0, the network device determines the first phase difference compensation value based on Formula 1 and determines the second phase difference compensation value based on Formula 2. Alternatively, if only the time domain interval, or the time domain position of the first RE and the time domain position of the second RE, is agreed, the network device determines only the first phase difference compensation value based on Formula 1; or if only the frequency domain interval, or the frequency domain position of the first RE and the frequency domain position of the second RE, is agreed, the network device determines only the second phase difference compensation value based on Formula 2.

[0157] Further, the network device can compensate the phase difference based on the first phase difference compensation value and / or the second phase difference compensation value. For example, the network device can compensate the phase difference according to Formula 3 below:

[0158] In Formula 3, represents the phase difference received by the network device. Φ is the compensated phase difference.

[0159] In the embodiment described based on FIG. 3, the phase difference received by the network device is determined based on the channels on the first RE and the second RE. Since the first RE and the second RE have the agreed positional relationship, the affected part in the phase difference, i.e., the extra phase difference, can be accurately known based on the agreed positional relationship. In this way, even if there is an extra phase difference in the phase difference, since the extra phase difference is accurate, the extra phase difference can be eliminated / compensated in some way, so as to obtain a more accurate phase difference.

[0160] Secondly, FIG. 5 shows a flowchart of a second communication method provided by the embodiment of the application. As shown in FIG. 5, the method includes steps 501 to 502. Wherein:

[0161] 501. The network device sends, to the terminal device, a first reference signal corresponding to a first device on a first resource, and sends, to the terminal device, a second reference signal corresponding to a second device on a second resource. Correspondingly, the terminal device receives the first reference signal and the second reference signal.

[0162] The specific implementation of step 501 can refer to the description in step 301, which is not described here.

[0163] 502. The terminal device sends, to the network device, a phase difference associated with a first resource and / or a second resource, and a time offset and / or a frequency offset bound with the phase difference, the time offset being a time offset between the first device and the second device, and the frequency offset being a frequency offset between the first device and the second device. Correspondingly, the network device receives the phase difference and the time offset and / or the frequency offset bound with the phase difference.

[0164] Wherein, the phase difference refers to a phase difference between a phase of a downlink channel between the first device and the terminal device and a phase of a downlink channel between the second device and the terminal device, and is a result after compensation of the time offset and / or the frequency offset.

[0165] Optionally, the phase difference associated with the first resource and / or the second resource can mean that the phase difference is measured according to the first reference signal on the first resource and / or the second reference signal on the second resource.

[0166] Optionally, the phase difference associated with the first resource and / or the second resource can also mean that the terminal device sends an index of the first resource and / or the second resource when sending the phase difference. Optionally, when the first resource and the second resource are located in the same resource set, the terminal device can also send an index of the resource set to which the first resource and the second resource belong.

[0167] In a possible implementation, the phase difference is determined by the terminal device according to channels on the first RE and the second RE. The first RE belongs to the first resource, and the second RE belongs to the second resource. Specifically, the terminal device measures a first reference signal on the first RE to obtain a phase of a downlink channel between the first device and the terminal device; and the terminal device measures a second reference signal on the second RE to obtain a phase of a downlink channel between the second device and the terminal device; then the terminal device determines a difference between the phase of the downlink channel between the first device and the terminal device and the phase of the downlink channel between the second device and the terminal device; finally, the terminal device compensates the difference to obtain the phase difference.

[0168] Optionally, the terminal device determines the phase difference according to the channels on the first RE and the second RE in the following two ways.

[0169] In a first way, the first RE and the second RE have an agreed position relationship. The terminal device can determine the first RE from the first resource and the second RE from the second resource based on configuration information of the first resource and the second resource and the agreed position relationship of the first RE and the second RE. The first RE and the second RE together form an RE pair used for calculating the phase difference. Then, the terminal device determines a difference between the phase of the downlink channel between the first device and the terminal device and the phase of the downlink channel between the second device and the terminal device based on the channels on the RE pair, and compensates the difference. The agreed position relationship in the first way and the specific implementation of determining the phase difference between the downlink channels can refer to the steps in 302 above, and will not be described here.

[0170] In a second way, the first RE and the second RE do not have an agreed position relationship. The terminal device can directly determine the first RE from the first resource and the second RE from the second resource based on the configuration information of the first resource and the second resource. The first RE and the second RE together form an RE pair used for calculating the phase difference. Then, the terminal device determines a difference between the phase of the downlink channel between the first device and the terminal device and the phase of the downlink channel between the second device and the terminal device based on the channels on the RE pair, and compensates the difference.

[0171] Optionally, the number of the first RE and the second RE can be one or more, and accordingly, the number of the RE pair formed by the first RE and the second RE for calculating the phase difference can be one pair or multiple pairs.

[0172] Optionally, the time domain interval between the time domain position of the first RE and the time domain position of the second RE in different RE pairs can be the same or different, and / or the frequency domain interval between the frequency domain position of the first RE and the frequency domain position of the second RE in different RE pairs can be the same or different. For example, the first RE in a pair of RE pairs is denoted as (l1, k1), and the second RE is denoted as (L1, K1); the first RE in another pair of RE pairs is denoted as (l2, k2), and the second RE is denoted as (L2, K2). The denotation can refer to the description in step 302. Then, l1-L1 can be the same as or different from l2-L2, and / or k1-K1 can be the same as or different from k2-K2. This is not limited in mode two.

[0173] The time offset and the frequency offset refer to a time offset between the first device and the second device measured by the terminal device, and a frequency offset between the first device and the second device measured by the terminal device.

[0174] Optionally, the time offset and the frequency offset can be measurement results when the terminal device receives the first reference signal and the second reference signal; or can be the measurement results closest to the time of receiving the first reference signal and the second reference signal, which is not limited in the embodiments of the application.

[0175] The time offset and / or the frequency offset bound with the phase difference refer to that the phase difference has a binding relationship with the time offset and / or the frequency offset.

[0176] For example, in the process of determining the phase difference, the terminal device uses the time offset and / or the frequency offset to obtain a compensated phase difference. Then, the time offset and / or the frequency offset bound with the phase difference can not only indicate that the phase difference is the result after compensation for the time offset and / or the frequency offset, but also indicate that the time offset and / or the frequency offset is the time offset and / or the frequency offset used in the compensation process.

[0177] In a possible implementation, the terminal device uses the time offset and / or the frequency offset to compensate the difference between the phase of the downlink channel between the first device and the terminal device and the phase of the downlink channel between the second device and the terminal device, which is determined based on the first resource and the second resource. In this way, the phase difference processed using the time offset and / or the frequency offset is a more accurate phase difference; the terminal device sends the phase difference to the network device, which is the compensated phase difference, and the time offset and / or the frequency offset can also indicate that the sent phase difference is the compensated phase difference.

[0178] The terminal device uses the time offset and / or the frequency offset to compensate for a difference between a phase of a downlink channel between the first device and the terminal device determined based on the first resource and the second resource and a phase of a downlink channel between the second device and the terminal device in the following manner:

[0179] For the above-mentioned manner one, the terminal device can compensate according to the formula 1, the formula 2 and the formula 3 in the above-mentioned step 302. It should be understood that the It can be understood that the difference between the phase of the downlink channel between the first device and the terminal device determined based on the first resource and the second resource and the phase of the downlink channel between the second device and the terminal device.

[0180] For the above-mentioned manner two, there are the following two cases:

[0181] Case 1: When the time domain interval between the time domain position of the first RE and the time domain position of the second RE in different RE pairs is different, and / or the frequency domain interval between the frequency domain position of the first RE and the frequency domain position of the second RE in different RE pairs is different, the terminal device can first obtain the downlink channel phase difference corresponding to each RE pair, and then determine the time domain interval and / or the frequency domain interval corresponding to each RE pair, and compensate for the downlink channel phase difference corresponding to each RE pair through the time domain interval and / or the frequency domain interval corresponding to each RE pair. Finally, the compensated phase differences corresponding to multiple RE pairs are combined to obtain the phase difference sent to the network device. For example, the phase difference obtained based on the first RE (l1, k1) and the second RE (L1, K1) can be compensated, and the phase difference obtained based on the first RE (l2, k2) and the second RE (L2, K2) can be compensated. Then, the two compensation results are combined.

[0182] Case 2: When the time domain interval between the time domain position of the first RE and the time domain position of the second RE in different RE pairs is the same, and / or the frequency domain interval between the frequency domain position of the first RE and the frequency domain position of the second RE in different RE pairs is the same, the phase difference sent to the network device can be obtained according to the processing manner of case 1. Or, the downlink channel phase difference corresponding to each RE pair can be first obtained and combined, and then the combined phase difference is compensated according to the same time domain interval and / or frequency domain interval to obtain the phase difference sent to the network device. The present application does not limit this. For example, the downlink channel phase difference obtained based on the first RE (l1, k1) and the second RE (L1, K1) and the phase difference obtained based on the first RE (l2, k2) and the second RE (L2, K2) can be combined first, and then the combined result is compensated.

[0183] It should be understood that the specific implementation of compensation in case 1 and case 2 can be similar to formula 1, formula 2 and formula 3 in step 302 described above, and details are not repeated here.

[0184] In a possible implementation, after the terminal device obtains the phase difference sent to the network device, the terminal device can send the phase difference and the time offset and / or frequency offset bound with the phase difference to the network device through the same message. It should be understood that the network device receives the phase difference and the time offset and / or frequency offset bound in the same message, and naturally knows that the received phase difference and the time offset and / or frequency offset have a binding relationship.

[0185] Alternatively, the terminal device can send the phase difference and the time offset and / or frequency offset bound with the phase difference to the network device through different messages. For example, the terminal device sends a first message and a second message to the network device, the first message includes the phase difference, the second message includes the time offset and / or frequency offset bound with the phase difference, and indicates to the network device that the phase difference in the first message and the time offset and / or frequency offset in the second message have a binding relationship.

[0186] Based on the embodiment described in FIG. 5, the network device can receive the phase difference and the time offset and / or frequency offset bound with the phase difference. The time offset and / or frequency offset bound with the phase difference can indicate that the phase difference is a relatively accurate phase difference. For example, the phase difference received by the network device is a phase difference processed based on the bound time offset and / or frequency offset. Then, the bound time offset and / or frequency offset can not only indicate that the phase difference is an accurate result of processing, but also indicate that it is the time offset and / or frequency offset used in the processing process.

[0187] Based on the embodiment shown in FIG. 3 described above, the network device can obtain and compensate the phase difference between the first device and the second device on the downlink channel; based on the embodiment shown in FIG. 5 described above, the network device can obtain the phase difference between the first device and the second device on the downlink channel compensated by the terminal device. Both of the two embodiments can enable the network device to obtain the accurate phase difference between the first device and the second device.

[0188] Further, the network device can also obtain the accurate phase difference between the first device and the second device on the uplink channel.

[0189] Next, how to obtain the accurate phase difference between the first device and the second device on the uplink channel is introduced, as shown in FIG. 6:

[0190] 601. The terminal device sends a third reference signal to the first device on a third resource.

[0191] 602、the terminal device sends a fourth reference signal to the second device on a fourth resource.

[0192] wherein the third resource is a time-frequency resource occupied by the third reference signal, and the fourth resource is a time-frequency resource occupied by the fourth reference signal, the third reference signal is used to estimate an uplink channel between the first device and the terminal device, and the fourth reference signal is used to estimate an uplink channel between the second device and the terminal device.

[0193] For example, the third reference signal and the fourth reference signal can be one or more of a sounding reference signal (SRS) or a de-modulation reference signal (DMRS).

[0194] In a possible implementation, before step 601, the network device can further configure the terminal device with the time-frequency resource occupied by the third reference signal, i.e., the third resource, and further configure the terminal device with the time-frequency resource occupied by the fourth reference signal, i.e., the fourth resource. The configuration manner can refer to the configuration manner of the first resource and the second resource in step 301.

[0195] 603、the network device determines the uplink channel between the first device and the terminal device based on the third reference signal.

[0196] 604、the network device determines the uplink channel between the second device and the terminal device based on the fourth reference signal.

[0197] In a possible implementation, the network device can determine the third RE from the third resource, and determine the fourth RE from the fourth resource. The third RE and the fourth RE together form a RE pair used to calculate a phase difference. The network device determines the uplink channel between the first device and the terminal device based on the channel on the third RE, and determines the uplink channel between the second device and the terminal device based on the channel on the fourth RE.

[0198] Optionally, the number of the third RE and the fourth RE can be one or more, and accordingly, the number of the RE pair used to calculate the phase difference, which is formed by the third RE and the fourth RE, can be one pair or multiple pairs. It should be understood that each pair of REs in the multiple pairs of REs includes two REs, one of the two REs is from the third resource and the other is from the fourth resource, the RE from the third resource in the two REs can be referred to as the third RE, and the RE from the fourth resource can be referred to as the fourth RE.

[0199] In a possible implementation, the third RE and the fourth RE have an agreed position relationship. The agreed position relationship can refer to the description of the agreed position relationship between the first RE and the second RE in 302 described above, and details are not repeated here.

[0200] In a possible implementation, the third RE and the fourth RE do not have an agreed position relationship. The network device can directly determine the third RE from the third resource based on the configuration information of the third resource, and can directly determine the fourth RE from the fourth resource based on the configuration information of the fourth resource. This way can refer to the description of the way 2 in 502 described above.

[0201] 605, the network device determines and compensates the phase difference of the uplink channel between the first device and the second device.

[0202] The network device can obtain and compensate the phase difference of the uplink channel between the first device and the second device. The compensation method can refer to the compensation method in 502 described above, and details are not repeated here.

[0203] It should be understood that if the phase difference of the downlink channel between the first device and the second device is compensated by the network device according to the embodiment shown in FIG. 3 described above, the time offset and / or frequency offset used when the compensation is performed here can be the time offset and / or frequency offset used in the embodiment shown in FIG. 3. If the phase difference of the downlink channel between the first device and the second device is compensated by the terminal device according to the embodiment shown in FIG. 5 described above, the time offset and / or frequency offset used when the compensation is performed here can be the time offset and / or frequency offset received and bound with the phase difference in the embodiment shown in FIG. 5.

[0204] Based on the embodiment described in FIG. 6, the network device can also compensate the obtained phase difference of the uplink channel between the first device and the second device, so as to obtain the accurate phase difference of the uplink channel.

[0205] Further, the embodiment shown in FIG. 6 can be combined with the embodiment shown in FIG. 3 or FIG. 5 described above, so as to obtain the accurate value of θ1-θ2, which is beneficial for the first device and the second device to jointly perform precoding based on the accurate value of θ1-θ2.

[0206] It should be understood that, in order to implement the functions in the above embodiments, the network device (including the first device and the second device) and the terminal device include hardware structures and / or software modules corresponding to the functions. Those skilled in the art should easily understand that, in combination with the units and method steps of the examples described in the embodiments disclosed in the present application, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is implemented in hardware or computer software driven hardware depends on the specific application scenarios and design constraints of the technical solutions.

[0207] FIG. 7 and FIG. 8 are structural schematic diagrams of possible communication apparatuses provided by the embodiments of the present application. The communication apparatuses can be used to implement the functions of the network device or the terminal device in the above method embodiments, and thus can also achieve the beneficial effects possessed by the above method embodiments. In the embodiments of the present application, the communication apparatus can be the device 120 as shown in FIG. 1, or the device 110 as shown in FIG. 1, or a module (such as a chip) applied to the network device or the terminal device.

[0208] As shown in FIG. 7, the communication apparatus 700 includes a processing unit 710 and a transceiver unit 720.

[0209] In one embodiment, the communication apparatus 700 is used to implement the functions of the network device or the terminal device in the above method embodiments.

[0210] When the communication apparatus 700 is used to implement the functions of the network device in the above method embodiments, the transceiver unit 720 is configured to: transmit a first reference signal corresponding to a first device on a first resource, and transmit a second reference signal corresponding to a second device on a second resource; and receive a phase difference, the phase difference being determined according to channels on a first resource element RE and a second resource element RE, the first RE belonging to the first resource, the second RE belonging to the second resource, and the first RE and the second RE having a predetermined positional relationship. The processing unit 710 is configured to compensate the phase difference based on the predetermined positional relationship.

[0211] When the communication apparatus 700 is used to implement the functions of the terminal device in the above method embodiments, the transceiver unit 720 is configured to: receive a first reference signal corresponding to a first device on a first resource, and receive a second reference signal corresponding to a second device on a second resource; and transmit a phase difference, the phase difference being determined according to channels on a first resource element RE and a second resource element RE, the first RE belonging to the first resource, the second RE belonging to the second resource, and the first RE and the second RE having a predetermined positional relationship.

[0212] In another embodiment, the communication apparatus 700 is used to implement the functions of the network device or the terminal device in the above method embodiments.

[0213] When the communication apparatus 700 is configured to implement the functions of the network device in the above method embodiments, the transceiver 720 is configured to transmit the first reference signal corresponding to the first device on the first resource, and transmit the second reference signal corresponding to the second device on the second resource; receive the phase difference, and the time difference and / or the frequency difference bound with the phase difference, the phase difference being associated with the first resource and / or the second resource, the time difference being the time difference between the first device and the second device, and the frequency difference being the frequency difference between the first device and the second device.

[0214] When the communication apparatus 700 is configured to implement the functions of the terminal device in the above method embodiments, the transceiver 720 is configured to receive the first reference signal corresponding to the first device on the first resource, and receive the second reference signal corresponding to the second device on the second resource; transmit the phase difference, and the time difference and / or the frequency difference bound with the phase difference according to the first resource and the second resource, the time difference being the time difference between the first device and the second device, and the frequency difference being the frequency difference between the first device and the second device. The processing unit 710 is configured to compensate the phase difference based on the agreed position relationship.

[0215] For more detailed description of the processing unit 710 and the transceiver 720, please refer to the relevant description in the above method embodiments.

[0216] As shown in FIG. 8, the communication apparatus 800 includes a processor 810 and an interface circuit 820. The processor 810 and the interface circuit 820 are coupled with each other. It can be understood that the interface circuit 820 can be a transceiver or an input / output interface. Optionally, the communication apparatus 800 can further include a memory 830 for storing instructions executed by the processor 810 or storing input data required by the processor 810 for running instructions or storing data generated after the processor 810 runs instructions. Sometimes, the interface circuit 820 can also be understood as a part of the processor 810, and the communication apparatus 800 includes the processor 810 at this time.

[0217] When the communication apparatus 800 is configured to implement the above method embodiments, the processor 810 is configured to implement the functions of the processing unit 710, and the interface circuit 820 is configured to implement the functions of the transceiver 720.

[0218] When the above communication apparatus is a chip applied to a terminal device, the terminal device chip implements the functions of the terminal device in the above method embodiments. The terminal device chip receives information from the network device, which can be understood as the information being first received by other modules (such as a radio frequency module or an antenna) in the terminal device, and then transmitted to the terminal chip by these modules. The terminal device chip sends information to the network device, which can be understood as the information being first sent to other modules (such as a radio frequency module or an antenna) in the terminal device, and then transmitted to the network device by these modules.

[0219] When the communication device is a chip applied to a network device, the network device chip implements the functions of the network device in the method embodiments. The network device chip receives information from a terminal device, which can be understood as the information being received by other modules (such as a radio frequency module or an antenna) in the network device first, and then being sent to the network device chip by the modules. The network device chip sends information to the terminal device, which can be understood as the information being sent to other modules (such as a radio frequency module or an antenna) in the network device first, and then being sent to the terminal device by the modules.

[0220] In the present application, entity A sending information to entity B can be A sending directly to B, or A sending indirectly to B through other entities. Similarly, entity B receiving information from entity A can be entity B receiving the information sent by entity A directly, or entity B receiving the information sent by entity A indirectly through other entities. Here, entity A and B can be network devices or terminal devices, or modules inside network devices or terminal devices. The sending and receiving of information can be information interaction between network devices and terminal devices, for example, information interaction between network devices and terminal devices; the sending and receiving of information can also be information interaction between two network devices, for example, information interaction between a CU and a DU; the sending and receiving of information can also be information interaction between different modules inside a device, for example, information interaction between a terminal device chip and other modules of the terminal device, or information interaction between a network device chip and other modules of the network device.

[0221] It can be understood that the processor in the embodiments of the present application can be a central processing unit, and can also be other general-purpose processors, digital signal processors, application-specific integrated circuits, field programmable gate arrays, or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. The general-purpose processor can be a microprocessor, or any conventional processor.

[0222] The method steps in the embodiments of the present application can be implemented in hardware or in software instructions executable by a processor. The software instructions can be composed of corresponding software modules, which can be stored in a random access memory, a flash memory, a read-only memory, a programmable read-only memory, an erasable programmable read-only memory, an electrically erasable programmable read-only memory, a register, a hard disk, a mobile hard disk, a read-only optical disk, or any other form of storage medium well known in the art. An exemplary storage medium is coupled to the processor, so that the processor can read information from the storage medium and write information to the storage medium. The storage medium can also be an integral part of the processor. The processor and the storage medium can be located in an application-specific integrated circuit. In addition, the application-specific integrated circuit can be located in a network device or a terminal device. The processor and the storage medium can also exist as discrete components in the network device or the terminal device.

[0223] In the above embodiments, all or part of the embodiments can be implemented by software, hardware, firmware, or any combination thereof. When implemented by software, all or part of the embodiments can be implemented in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer programs or instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are performed. The computer can be a general-purpose computer, a special-purpose computer, a computer network, a network device, a user equipment, or other programmable apparatus. The computer programs or instructions can be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another computer-readable storage medium, for example, the computer programs or instructions can be transferred from one website site, computer, server, or data center to another website site, computer, server, or data center through wired or wireless means. The computer-readable storage medium can be any available medium accessible by a computer or a data storage device such as a server, data center, etc. that integrates one or more available media. The available media can be a magnetic medium, such as a floppy disk, a hard disk, a magnetic tape; an optical medium, such as a digital video disc; and a semiconductor medium, such as a solid-state disk. The computer-readable storage medium can be a volatile or non-volatile storage medium, or can include both volatile and non-volatile storage media.

[0224] The terms "first", "second", "third", and "fourth" and the like in the description and in the claims of the present application and in the drawings of the application are used for distinguishing between similar objects and not necessarily for describing a specific sequential or chronological order. The terms "comprises", "comprising", "includes", "including" and the like are used for indicating the inclusion of one or more steps or units, but not exclusion of any other steps or units. For example, a process, method, article, or apparatus that comprises a list of steps or units does not necessarily comprise only those steps or units in the list and can include other steps or units not expressly listed or inherent to such process, method, article, or apparatus.

[0225] It should be understood that, in the present application, "at least one" means one or more, and "multiple" means two or more. "And / or" is used to describe the relationship between associated objects, which means that there can be three relationships, for example, "A and / or B" can mean that there are three cases: only A, only B, and A and B at the same time, where A and B can be singular or plural. The character " / " generally represents an "or" relationship between the associated objects. "At least one of the following" or the like means any combination of these items, including any combination of single or multiple items. For example, at least one of a, b or c can mean a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.

[0226] It can be understood that the various numerical numbers involved in the embodiments of the present application are only for convenient differentiation and do not limit the scope of the embodiments of the present application. The size of the serial number of the above processes does not mean the order of execution, and the execution order of the processes should be determined by its function and inherent logic.

Claims

1. A communication method characterized by comprising: The method comprises: sending a first reference signal corresponding to a first device on a first resource, and sending a second reference signal corresponding to a second device on a second resource; receiving a phase difference, the phase difference being determined according to channels on a first resource element (RE) and a second RE, the first RE belonging to the first resource, and the second RE belonging to the second resource, the first RE and the second RE having a predetermined positional relationship.

2. The method of claim 1, wherein, The method further comprises compensating the phase difference based on the predetermined positional relationship.

3. The method according to claim 1 or 2, characterized in that, The first RE and the second RE have a predetermined positional relationship, which comprises: a time domain interval between a time domain position of the first RE and a time domain position of the second RE is a predetermined time domain interval, and / or a frequency domain interval between a frequency domain position of the first RE and a frequency domain position of the second RE is a predetermined frequency domain interval.

4. The method according to any one of claims 1 to 3, characterized in that, The first RE and the second RE have a predetermined positional relationship, which comprises: a time domain position of the first RE and a time domain position of the second RE are predetermined time domain positions, and / or a frequency domain position of the first RE and a frequency domain position of the second RE are predetermined frequency domain positions.

5. The method according to any one of claims 2-4, characterized in that, The compensation of the phase difference based on the predetermined positional relationship comprises: determining a time domain interval between a time domain position of the first RE and a time domain position of the second RE, and / or determining a frequency domain interval between a frequency domain position of the first RE and a frequency domain position of the second RE based on the predetermined positional relationship; compensating the phase difference based on at least one of the time domain interval, the frequency domain interval, a time offset and a frequency offset, the time offset being a time offset between the first device and the second device, and the frequency offset being a frequency offset between the first device and the second device.

6. The method of claim 5, wherein, The compensation of the phase difference based on at least one of the time domain interval, the frequency domain interval, the time offset and the frequency offset comprises: determining a first phase difference compensation value based on the time domain interval and the frequency offset, and / or determining a second phase difference compensation value based on the frequency domain interval and the time offset; compensating the phase difference based on the first phase difference compensation value and / or the second phase difference compensation value.

7. A communication method characterized by comprising: The method comprises: sending a first reference signal corresponding to a first device on a first resource, and sending a second reference signal corresponding to a second device on a second resource; receiving a phase difference and a time offset and / or a frequency offset bound to the phase difference, the phase difference being associated with the first resource and / or the second resource, the time offset being a time offset between the first device and the second device, and the frequency offset being a frequency offset between the first device and the second device.

8. The method of claim 7, wherein, The phase difference is determined according to channels on a first resource element (RE) and a second RE, the first RE belonging to the first resource, and the second RE belonging to the second resource.

9. The method according to claim 7 or 8, characterized in that, The phase difference is a compensated phase difference.

10. The method of claim 9, wherein, The phase difference is a compensated phase difference, which comprises: The phase difference is compensated according to at least one of a time domain interval between a time domain position of the first RE and a time domain position of the second RE, a frequency domain interval between a frequency domain position of the first RE and a frequency domain position of the second RE, the time offset, and the frequency offset.

11. The method according to any one of claims 8-10, characterized in that, The first RE and the second RE have an agreed position relationship.

12. The method of claim 11, wherein the first RE and the second RE have an agreed position relationship, comprising: a time domain interval between a time domain position of the first RE and a time domain position of the second RE is an agreed time domain interval, and / or a frequency domain interval between a frequency domain position of the first RE and a frequency domain position of the second RE is an agreed frequency domain interval.

13. The method of claim 11 or 12, wherein the first RE and the second RE have an agreed position relationship, comprising: a time domain position of the first RE and a time domain position of the second RE are agreed time domain positions, and / or a frequency domain position of the first RE and a frequency domain position of the second RE are agreed frequency domain positions.

14. A communication method, comprising: The method comprises: receiving a first reference signal corresponding to a first device on a first resource, and receiving a second reference signal corresponding to a second device on a second resource; sending a phase difference, the phase difference being determined according to channels on a first resource element (RE) and a second RE, the first RE belonging to the first resource, the second RE belonging to the second resource, the first RE and the second RE having an agreed position relationship.

15. The method of claim 14, wherein the first RE and the second RE have an agreed position relationship, comprising: a time domain interval between a time domain position of the first RE and a time domain position of the second RE is an agreed time domain interval, and / or a frequency domain interval between a frequency domain position of the first RE and a frequency domain position of the second RE is an agreed frequency domain interval.

16. The method of claim 14 or 15, wherein the first RE and the second RE have an agreed position relationship, comprising: a time domain position of the first RE and a time domain position of the second RE are agreed time domain positions, and / or a frequency domain position of the first RE and a frequency domain position of the second RE are agreed frequency domain positions.

17. A method of communication, comprising: The method comprises: receiving a first reference signal corresponding to a first device on a first resource, and receiving a second reference signal corresponding to a second device on a second resource; sending a phase difference, a time offset and / or a frequency offset bound to the phase difference according to the first resource and the second resource, the time offset being a time offset between the first device and the second device, and the frequency offset being a frequency offset between the first device and the second device.

18. The method of claim 17, wherein, The sending of the phase difference according to the first resource and the second resource comprises: determining the phase difference according to channels on a first resource element (RE) and a second RE, the first RE belonging to the first resource, the second RE belonging to the second resource; sending the phase difference.

19. The method of claim 17 or 18, wherein, The phase difference is a compensated phase difference.

20. The method of claim 19, wherein, The method further comprises: compensating for at least one of a time domain interval between a time domain position of the first RE and a time domain position of the second RE, a frequency domain interval between a frequency domain position of the first RE and a frequency domain position of the second RE, the time offset, and the frequency offset.

21. The method of claim 20, wherein, The compensating based on at least one of the time domain interval, the frequency domain interval, the time offset, and the frequency offset comprises: determining a first phase difference compensation value based on the time domain interval and the frequency offset, and / or determining a second phase difference compensation value based on the frequency domain interval and the time offset; compensating based on the first phase difference compensation value and / or the second phase difference compensation value.

22. The method of any one of claims 18-21, wherein, The first RE and the second RE have an agreed position relationship.

23. The method of claim 22, the first RE and the second RE having an agreed position relationship comprises: a time domain interval between a time domain position of the first RE and a time domain position of the second RE is an agreed time domain interval, and / or a frequency domain interval between a frequency domain position of the first RE and a frequency domain position of the second RE is an agreed frequency domain interval.

24. The method of claim 22 or 23, the first RE and the second RE having an agreed position relationship comprises: a time domain position of the first RE and a time domain position of the second RE are agreed time domain positions, and / or a frequency domain position of the first RE and a frequency domain position of the second RE are agreed frequency domain positions.

25. A communications device, characterized by comprising a processor and interface circuitry for receiving signals from and transmitting signals to other communication devices, the processor being configured to implement the method of any one of claims 1-13 or 14-24 by logic circuitry or by executing code instructions.

26. A computer-readable storage medium, characterized in that, The storage medium has stored therein a computer program or instructions which, when executed by a communication device, implement the method of any one of claims 1-13 or 14-24.

27. A computer program product comprising computer programs or instructions, characterized in that, The computer program or instructions, when executed by a communication device, implement the method of any one of claims 1-13 or 14-24.

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