Communication method and device, communication equipment and storage medium

Abstract

The embodiment of the invention provides a communication method and device, communication equipment and a storage medium. The method comprises the steps that configuration information is sent, the configuration information is used for indicating the number of downlink phase tracking reference signal PTRS ports, and the downlink PTRS is used for estimating and compensating phase noise (PN) generated by a local oscillator used by at least one radio frequency chain, so that the phase noise is accurately estimated and compensated.

Description

Communication method and device, communication equipment and storage medium

[0001] The present disclosure relates to the field of communication technology, and in particular to a communication method and apparatus, communication equipment and storage medium.

[0002] The millimeter wave band has a huge available bandwidth, can provide extremely high transmission rates, and has a short wavelength, which is conducive to the integration of antenna elements. These advantages make the research of millimeter wave wireless communication technology very popular. However, millimeter waves also have obvious defects, such as being easily blocked by obstacles and being very sensitive to phase noise (PN).

[0003]

[0004] Under different local oscillator architectures, the network device indicates the number of downlink phase tracking reference signal (PTRS) ports to the terminal, so that the terminal can determine the corresponding PTRS time-frequency domain density configuration according to the number of PTRS ports, thereby achieving accurate estimation and compensation of PN and improving the overall system performance.

[0005] According to a first aspect of an embodiment of the present disclosure, a communication method is provided, which is executed by a network device, and the method includes: sending configuration information, where the configuration information is used to indicate the number of downlink PTRS ports, and the downlink PTRS is used to estimate and compensate for the PN generated by a local oscillator used by at least one RF chain.

[0006] According to a second aspect of an embodiment of the present disclosure, a communication method is provided, which is executed by a terminal, and the method includes: receiving configuration information, the configuration information is used to indicate the number of downlink PTRS ports; based on the number of downlink PTRS ports, determining the time-frequency domain density configuration of the downlink PTRS; wherein the downlink PTRS is used to estimate and compensate for the PN generated by the local oscillator used by at least one RF chain.

[0007] According to the third aspect of an embodiment of the present disclosure, a communication device is provided, which can be applied to a network device, and the communication device includes: a sending module, configured to send configuration information, the configuration information is used to indicate the number of downlink PTRS ports, and the downlink PTRS is used to estimate and compensate for the PN generated by a local oscillator used by at least one RF chain.

[0008] According to the fourth aspect of an embodiment of the present disclosure, a communication device is provided, which can be applied to a terminal, and the communication device includes: a receiving module, configured to receive configuration information, the configuration information is used to indicate the number of downlink PTRS ports; a processing module, configured to determine the time-frequency domain density configuration of the downlink PTRS based on the number of downlink PTRS ports; wherein the downlink PTRS is used to estimate and compensate for the PN generated by a local oscillator used by at least one RF chain.

[0009] According to a fifth aspect of an embodiment of the present disclosure, a communication device, such as a network device or a terminal, is provided. The communication device comprises: at least one processor; a memory coupled to the at least one processor, the memory storing executable instructions, and when the executable instructions are executed by the at least one processor, the communication device executes the method described in any one of the first aspect, the second aspect, and the embodiments thereof.

[0010] According to a sixth aspect of the embodiments of the present disclosure, a storage medium is provided, wherein instructions are stored in the storage medium, and when the instructions are executed in a communication device, the communication device executes the method as described in any one of the first aspect, the second aspect and the embodiments thereof.

[0011] The storage medium stores instructions. When the instructions are executed by the processor, the method described in any one of the first aspect, the second aspect and the embodiments thereof is performed.

[0012] According to a seventh aspect of the embodiments of the present disclosure, a computer program or a computer program product is provided. The computer program or the computer program product includes code. When the instructions are executed by a processor, the method as described in any one of the first aspect, the second aspect and the embodiments thereof is executed.

[0013] The embodiments of the present disclosure can be used to accurately estimate and compensate PN.

[0014] It should be understood that the above general description and the following detailed description are merely exemplary and explanatory and do not constitute limitations on the embodiments of the present disclosure.

[0015] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the embodiments of the present invention.

[0016] FIG1 is a schematic diagram of an architecture of a communication system provided according to an embodiment of the present disclosure.

[0017] FIG2 is a schematic diagram of an OFDM system affected by PN in a centralized local oscillator architecture according to an embodiment of the present disclosure.

[0018] FIG3 is a schematic diagram of an OFDM system affected by PN under a distributed local oscillator architecture according to an embodiment of the present disclosure.

[0019] FIG. 4 is an exemplary interaction diagram of a communication method provided according to an embodiment of the present disclosure.

[0020] FIG5A is a schematic diagram of a structure of a network device provided according to an embodiment of the present disclosure.

[0021] FIG5B is another schematic diagram of the structure of a network device provided according to an embodiment of the present disclosure.

[0022] FIG. 6 is an exemplary flowchart of a communication method performed on a network device side according to an embodiment of the present disclosure.

[0023] FIG. 7 is an exemplary flowchart of a communication method performed by a terminal side according to an embodiment of the present disclosure.

[0024] FIG8 is an exemplary structural diagram of a communication device provided according to an embodiment of the present disclosure.

[0025] FIG. 9 is a schematic diagram of a structure of a communication device provided according to an embodiment of the present disclosure.

[0026] Embodiments of the present disclosure provide a communication method and apparatus, a communication device, and a storage medium.

[0027] In a first aspect, the present disclosure implements a communication method, which is executed by a network device, and the method includes: sending configuration information, where the configuration information is used to indicate the number of downlink PTRS ports, and the downlink PTRS is used to estimate and compensate for the PN generated by a local oscillator used by at least one RF chain.

[0028] In the disclosed embodiment, the network device indicates the number of downlink PTRS ports to the terminal, so that the terminal can determine the time-frequency domain density configuration of the corresponding downlink PTRS according to the number of downlink PTRS ports. The time-frequency domain density configuration at this time is more conducive to the terminal to accurately estimate and compensate for PN, thereby improving the overall performance of the system.

[0029] In combination with some embodiments of the first aspect, in some embodiments, the configuration information includes at least one of the following: the maximum number of downlink PTRS ports; the number of transmission configuration indication (TCI) states; the number of code division multiplexing (CDM) groups corresponding to demodulation reference signal (DMRS) ports.

[0030] In combination with some embodiments of the first aspect, in some embodiments, sending configuration information includes at least one of the following: sending downlink PTRS configuration information, the downlink PTRS configuration information includes the maximum number of downlink PTRS ports and / or the number of CDM groups corresponding to the DMRS ports; sending downlink control information (downlink control information, DCI), DCI is used to indicate the number of TCI states.

[0031] In combination with some embodiments of the first aspect, in some embodiments, the number of downlink PTRS ports is 1 or N, where N is an integer greater than or equal to 2.

[0032] In combination with some embodiments of the first aspect, in some embodiments, when the maximum number of downstream PTRS ports is configured to be 1, the number of downstream PTRS ports is 1.

[0033] In combination with some embodiments of the first aspect, in some embodiments, when the maximum number of downlink PTRS ports is configured to N and N is equal to 2, when the number of TCI states is equal to 2 and the number of CDM groups corresponding to the DMRS ports is equal to 2, the number of downlink PTRS ports is 2; or, when the number of TCI states is equal to 1 and / or the number of CDM groups corresponding to the DMRS ports is equal to 1, the number of downlink PTRS ports is 1.

[0034] In combination with some embodiments of the first aspect, in some embodiments, when the number of downlink PTRS ports is 2, the two downlink PTRS ports are respectively associated with the lowest index DMRS ports in the two DMRS port groups indicating the TCI state.

[0035] In combination with some embodiments of the first aspect, in some embodiments, the number of downlink PTRS ports is 1 corresponding to a first time-frequency domain density configuration; the number of downlink PTRS ports is N corresponding to a second time-frequency domain density configuration.

[0036] In combination with some embodiments of the first aspect, in some embodiments, the second time-frequency domain density configuration includes: time domain density and frequency domain density; the value of the time domain density is one of the following: 6, 4, 2; the value of the frequency domain density is one of the following: 1, 2.

[0037] In combination with some embodiments of the first aspect, in some embodiments, the second time-frequency domain density configuration includes at least one of the following: the modulation and coding scheme (MCS) of the downlink PTRS scheduling is greater than or equal to the first MCS threshold and less than the second MCS threshold, and the time domain density value is 6; the MCS of the downlink PTRS scheduling is greater than or equal to the second MCS threshold and less than the third MCS threshold, and the time domain density value is 4; the MCS of the downlink PTRS scheduling is greater than or equal to the third MCS threshold and less than the fourth MCS threshold, and the time domain density value is 2.

[0038] In combination with some embodiments of the first aspect, in some embodiments, the second time-frequency domain density configuration includes at least one of the following: the bandwidth of the downlink PTRS scheduling is greater than or equal to the first bandwidth threshold and less than the second bandwidth threshold, and the value of the frequency domain density is 1; the bandwidth of the downlink PTRS scheduling is greater than or equal to the second bandwidth threshold and less than the third bandwidth threshold, and the value of the frequency domain density is 2.

[0039] In a second aspect, the present disclosure implements a communication method, which is executed by a terminal, and the method includes: receiving configuration information, the configuration information is used to indicate the number of downlink PTRS ports; based on the number of downlink PTRS ports, determining the time-frequency domain density configuration of the downlink PTRS; wherein the downlink PTRS is used to estimate and compensate for the PN generated by the local oscillator used by at least one RF chain.

[0040] In combination with some embodiments of the second aspect, in some embodiments, the configuration information includes at least one of the following: the maximum number of downlink PTRS ports; the number of TCI states; the number of code CDM groups corresponding to the DMRS ports.

[0041] In combination with some embodiments of the second aspect, in some embodiments, receiving configuration information includes at least one of the following: receiving downlink PTRS configuration information, the downlink PTRS configuration information includes the maximum number of downlink PTRS ports and / or the number of CDM groups corresponding to the DMRS ports; receiving DCI, the DCI includes the number of TCI states.

[0042] In combination with some embodiments of the second aspect, in some embodiments, the number of downlink PTRS ports is 1 or N, where N is an integer greater than or equal to 2.

[0043] In combination with some embodiments of the second aspect, in some embodiments, when the maximum number of downlink PTRS ports is configured to be 1, the number of downlink PTRS ports is configured to be 1.

[0044] In combination with some embodiments of the second aspect, in some embodiments, when the maximum number of downlink PTRS ports is configured to N and N is equal to 2, when the number of TCI states is equal to 2 and the number of CDM groups corresponding to the DMRS ports is equal to 2, the number of downlink PTRS ports is 2; or, when the number of TCI states is equal to 1 and / or the number of CDM groups corresponding to the DMRS ports is equal to 1, the number of downlink PTRS ports is 1.

[0045] In combination with some embodiments of the second aspect, in some embodiments, when the number of downlink PTRS ports is 2, the two downlink PTRS ports are respectively associated with the lowest index DMRS ports in the two DMRS port groups indicating the TCI state.

[0046] In combination with some embodiments of the second aspect, in some embodiments, the time-frequency domain density configuration of the downlink PTRS is determined based on the number of downlink PTRS ports, including: when the number of downlink PTRS ports is 1, determining the time-frequency domain density configuration as the first time-frequency domain density configuration; or, when the number of downlink PTRS ports is N, determining the time-frequency domain density configuration as the second time-frequency domain density configuration.

[0047] In the disclosed embodiment, under different local oscillator architectures, due to the different effects of PN on the transmitted signal, the time-frequency domain density configuration range of the downlink PTRS required by the terminal for PN estimation and compensation is different. Under the centralized local oscillator architecture, since CPE on all subcarriers occupies the majority of the phase noise, PN elimination (also known as estimation and compensation) requires a smaller frequency domain density and a larger time domain density of PTRS. Under the distributed local oscillator architecture, since the phase deflections caused by the new interference items on different subcarriers are different, only CPE cannot be eliminated, so PN elimination requires a larger frequency domain density of PTRS, while the time domain density can be reduced due to the shortening of the symbol length. By configuring different time-frequency domain density configurations for different local oscillator architectures, the terminal can be more accurate when performing PN estimation and compensation, further improving system performance.

[0048] In combination with some embodiments of the second aspect, in some embodiments, the second time-frequency domain density configuration includes: time domain density and frequency domain density; the value of the time domain density is one of the following: 6, 4, 2; the value of the frequency domain density is one of the following: 1, 2.

[0049] In combination with some embodiments of the second aspect, in some embodiments, the second time-frequency domain density configuration includes at least one of the following: the MCS of the downlink PTRS scheduling is greater than or equal to the first MCS threshold and less than the second MCS threshold, and the time domain density value is 6; the MCS of the downlink PTRS scheduling is greater than or equal to the second MCS threshold and less than the third MCS threshold, and the time domain density value is 4; the MCS of the downlink PTRS scheduling is greater than or equal to the third MCS threshold and less than the fourth MCS threshold, and the time domain density value is 2.

[0050] In combination with some embodiments of the second aspect, in some embodiments, the second time-frequency domain density configuration includes at least one of the following: the bandwidth of the downlink PTRS scheduling is greater than or equal to the first bandwidth threshold and less than the second bandwidth threshold, and the value of the frequency domain density is 1; the bandwidth of the downlink PTRS scheduling is greater than or equal to the second bandwidth threshold and less than the third bandwidth threshold, and the value of the frequency domain density is 2.

[0051] In a third aspect, the present disclosure implements a communication device that can be applied to a network device, and the communication device includes: a sending module, configured to send configuration information, the configuration information is used to indicate the number of downlink PTRS ports, and the downlink PTRS is used to estimate and compensate for the PN generated by a local oscillator used by at least one RF chain.

[0052] In combination with some embodiments of the third aspect, in some embodiments, the configuration information includes at least one of the following: the maximum number of downlink PTRS ports; the number of TCI states; the number of CDM groups corresponding to the DMRS ports.

[0053] In combination with some embodiments of the third aspect, in some embodiments, the sending module is configured to perform at least one of the following: sending downlink PTRS configuration information, the downlink PTRS configuration information including the maximum number of downlink PTRS ports and / or the number of CDM groups corresponding to the DMRS ports; sending DCI, DCI is used to indicate the number of TCI states.

[0054] In combination with some embodiments of the third aspect, in some embodiments, the number of downlink PTRS ports is 1 or N, where N is an integer greater than or equal to 2.

[0055] In combination with some embodiments of the third aspect, in some embodiments, when the maximum number of downstream PTRS ports is configured to be 1, the number of downstream PTRS ports is 1.

[0056] In combination with some embodiments of the third aspect, in some embodiments, when the maximum number of downlink PTRS ports is configured to N and N is equal to 2, when the number of TCI states is equal to 2 and the number of CDM groups corresponding to the DMRS ports is equal to 2, the number of downlink PTRS ports is 2; or, when the number of TCI states is equal to 1 and / or the number of CDM groups corresponding to the DMRS ports is equal to 1, the number of downlink PTRS ports is 1.

[0057] In combination with some embodiments of the third aspect, in some embodiments, when the number of downlink PTRS ports is 2, the two downlink PTRS ports are respectively associated with the lowest index DMRS ports in the two DMRS port groups indicating the TCI state.

[0058] In combination with some embodiments of the third aspect, in some embodiments, the number of downlink PTRS ports is 1 corresponding to a first time-frequency domain density configuration; or, the number of downlink PTRS ports is N corresponding to a second time-frequency domain density configuration.

[0059] In combination with some embodiments of the third aspect, in some embodiments, the second time-frequency domain density configuration includes: time domain density and frequency domain density; the value of the time domain density is one of the following: 6, 4, 2; the value of the frequency domain density is one of the following: 1, 2.

[0060] In combination with some embodiments of the third aspect, in some embodiments, the second time-frequency domain density configuration includes at least one of the following: the MCS of the downlink PTRS scheduling is greater than or equal to the first MCS threshold and less than the second MCS threshold, and the time domain density value is 6; the MCS of the downlink PTRS scheduling is greater than or equal to the second MCS threshold and less than the third MCS threshold, and the time domain density value is 4; the MCS of the downlink PTRS scheduling is greater than or equal to the third MCS threshold and less than the fourth MCS threshold, and the time domain density value is 2.

[0061] In combination with some embodiments of the third aspect, in some embodiments, the second time-frequency domain density configuration includes at least one of the following: the bandwidth of the downlink PTRS scheduling is greater than or equal to the first bandwidth threshold and less than the second bandwidth threshold, and the value of the frequency domain density is 1; the bandwidth of the downlink PTRS scheduling is greater than or equal to the second bandwidth threshold and less than the third bandwidth threshold, and the value of the frequency domain density is 2.

[0062] In a fourth aspect, the present disclosure provides a communication device that can be applied to a terminal. The communication device includes: a receiving module configured to receive configuration information, the configuration information is used to indicate the number of downlink PTRS ports; a processing module configured to determine the time-frequency domain density configuration of the downlink PTRS based on the number of downlink PTRS ports; wherein the downlink PTRS is used to estimate and compensate for the PN generated by the local oscillator used by at least one RF chain.

[0063] In combination with some embodiments of the fourth aspect, in some embodiments, the configuration information includes at least one of the following: the maximum number of downlink PTRS ports; the number of TCI states; the number of code CDM groups corresponding to the DMRS ports.

[0064] In combination with some embodiments of the fourth aspect, in some embodiments, the receiving module is configured to perform at least one of the following: receiving downlink PTRS configuration information, the downlink PTRS configuration information including the maximum number of downlink PTRS ports and / or the number of CDM groups corresponding to the DMRS ports; receiving DCI, the DCI including the number of TCI states.

[0065] In combination with some embodiments of the fourth aspect, in some embodiments, the number of downlink PTRS ports is 1 or N, where N is an integer greater than or equal to 2.

[0066] In combination with some embodiments of the fourth aspect, in some embodiments, when the maximum number of downlink PTRS ports is configured to be 1, the number of downlink PTRS ports is configured to be 1.

[0067] In combination with some embodiments of the fourth aspect, in some embodiments, when the maximum number of downlink PTRS ports is configured to N and N is equal to 2, when the number of TCI states is equal to 2 and the number of CDM groups corresponding to the DMRS ports is equal to 2, the number of downlink PTRS ports is 2; or, when the number of TCI states is equal to 1 and / or the number of CDM groups corresponding to the DMRS ports is equal to 1, the number of downlink PTRS ports is 1.

[0068] In combination with some embodiments of the fourth aspect, in some embodiments, when the number of downlink PTRS ports is 2, the two downlink PTRS ports are respectively associated with the lowest index DMRS ports in the two DMRS port groups indicating the TCI state.

[0069] In combination with some embodiments of the fourth aspect, in some embodiments, the processing module is configured to, when the number of downstream PTRS ports is 1, determine that the time-frequency domain density configuration is the first time-frequency domain density configuration; or, when the number of downstream PTRS ports is N, determine that the time-frequency domain density configuration is the second time-frequency domain density configuration.

[0070] In combination with some embodiments of the fourth aspect, in some embodiments, the second time-frequency domain density configuration includes: time domain density and frequency domain density; the value of the time domain density is one of the following: 6, 4, 2; the value of the frequency domain density is one of the following: 1, 2.

[0071] In combination with some embodiments of the fourth aspect, in some embodiments, the second time-frequency domain density configuration includes at least one of the following: the MCS of the downlink PTRS scheduling is greater than or equal to the first MCS threshold and less than the second MCS threshold, and the time domain density value is 6; the MCS of the downlink PTRS scheduling is greater than or equal to the second MCS threshold and less than the third MCS threshold, and the time domain density value is 4; the MCS of the downlink PTRS scheduling is greater than or equal to the third MCS threshold and less than the fourth MCS threshold, and the time domain density value is 2.

[0072] In combination with some embodiments of the fourth aspect, in some embodiments, the second time-frequency domain density configuration includes at least one of the following: the bandwidth of the downlink PTRS scheduling is greater than or equal to the first bandwidth threshold and less than the second bandwidth threshold, and the value of the frequency domain density is 1; the bandwidth of the downlink PTRS scheduling is greater than or equal to the second bandwidth threshold and less than the third bandwidth threshold, and the value of the frequency domain density is 2.

[0073] In a fifth aspect, an embodiment of the present disclosure provides a communication device, such as a terminal or a network device. The communication device includes: at least one processor; a memory coupled to the at least one processor, the memory storing executable instructions, and when the executable instructions are executed by the at least one processor, the communication device executes the method as described in any one of the first aspect, the second aspect, and the embodiments thereof.

[0074] In a sixth aspect, an embodiment of the present disclosure provides a storage medium. The storage medium stores instructions. When the instructions are executed in a communication device, the communication device executes the method as described in any one of the first aspect, the second aspect, and the embodiments thereof.

[0075] In a seventh aspect, a computer program or a computer program product is provided. The computer program or the computer program product comprises code. When the instructions are executed by a processor, the method as described in any one of the first aspect, the second aspect and the embodiments thereof is performed.

[0076] It is understandable that the above communication devices, communication equipment, storage media, computer programs, and computer program products are all used to execute the methods provided in the embodiments of the present disclosure. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects in the corresponding methods, which will not be repeated here.

[0077] The embodiments of the present disclosure provide a communication method and apparatus, a communication device and a storage medium. In some embodiments, the terms such as the communication method and the PTRS configuration method, the method for determining the PTRS time-frequency resource density configuration, and the information processing method can be interchangeable, and the terms such as the communication device and the PTRS configuration device and the information processing device can be interchangeable.

[0078] The embodiments of the present disclosure are not exhaustive, but are only illustrative of some embodiments, and are not intended to be a specific limitation on the scope of protection of the present disclosure. In the absence of contradiction, each step in a certain embodiment can be implemented as an independent embodiment, and the steps can be arbitrarily combined. For example, a solution after removing some steps in a certain embodiment can also be implemented as an independent embodiment, and the order of the steps in a certain embodiment can be arbitrarily exchanged. In addition, the optional implementation methods in a certain embodiment can be arbitrarily combined; in addition, the embodiments can be arbitrarily combined, for example, some or all of the steps of different embodiments can be arbitrarily combined, and a certain embodiment can be arbitrarily combined with the optional implementation methods of other embodiments.

[0079] In each embodiment of the present disclosure, unless otherwise specified or there is a logical conflict, the terms and / or descriptions between the embodiments are consistent and can be referenced to each other, and the technical features in different embodiments can be combined to form a new embodiment based on their internal logical relationships.

[0080] The terms used in the embodiments of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure.

[0081] In the embodiments of the present disclosure, unless otherwise specified, elements expressed in the singular form, such as "a", "an", "a kind of", "the", "above", "said", "aforementioned", "this", etc., may mean "one and only one", or "one or more", "at least one", etc. For example, when using articles such as "a", "an", "the" in English in translation, the noun after the article may be understood as a singular expression or a plural expression.

[0082] In the embodiments of the present disclosure, “plurality” refers to two or more.

[0083] In some embodiments, the terms "at least one", "one or more", etc. can be used interchangeably.

[0084] In some embodiments, "at least one of A and B", "A and / or B", "A in one case, B in another case", "A in one case, B in another case", etc., may include the following technical solutions according to the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed); in some embodiments, A and B (both A and B are executed). When there are more branches such as A, B, C, etc., the above is also similar.

[0085] In some embodiments, the recording method of "A or B" may include the following technical solutions according to the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed). When there are more branches such as A, B, C, etc., the above is also similar.

[0086] The prefixes such as "first" and "second" in the embodiments of the present disclosure are only used to distinguish different description objects, and do not constitute restrictions on the position, order, priority, quantity or content of the description objects. The statement of the description object refers to the description in the context of the claims or embodiments, and should not constitute unnecessary restrictions due to the use of prefixes. For example, if the description object is a "field", the ordinal number before the "field" in the "first field" and the "second field" does not limit the position or order between the "fields", and the "first" and "second" do not limit whether the "fields" they modify are in the same message, nor do they limit the order of the "first field" and the "second field". For another example, if the description object is a "level", the ordinal number before the "level" in the "first level" and the "second level" does not limit the priority between the "levels". For another example, the number of description objects is not limited by the ordinal number, and can be one or more. Taking the "first device" as an example, the number of "devices" can be one or more. In addition, the objects modified by different prefixes may be the same or different. For example, if the description object is "device", then the "first device" and the "second device" may be the same device or different devices, and their types may be the same or different. For another example, if the description object is "information", then the "first information" and the "second information" may be the same information or different information, and their contents may be the same or different.

[0087] In some embodiments, “including A”, “comprising A”, “used to indicate A”, and “carrying A” can be interpreted as directly carrying A or indirectly indicating A.

[0088] In some embodiments, terms such as “…”, “determine…”, “in the case of…”, “at the time of…”, “when…”, “if…”, “if…”, etc. can be used interchangeably.

[0089] In some embodiments, terms such as "greater than", "greater than or equal to", "not less than", "more than", "more than or equal to", "not less than", "higher than", "higher than or equal to", "not lower than", and "above" can be replaced with each other, and terms such as "less than", "less than or equal to", "not greater than", "less than", "less than or equal to", "no more than", "lower than", "lower than or equal to", "not higher than", and "below" can be replaced with each other.

[0090] In some embodiments, devices, etc. can be interpreted as physical or virtual, and their names are not limited to the names recorded in the embodiments. Terms such as "device", "equipment", "device", "circuit", "network element", "node", "function", "unit", "section", "system", "network", "chip", "chip system", "entity", and "subject" can be used interchangeably.

[0091] In some embodiments, "network" can be interpreted as devices included in the network (eg, access network equipment, core network equipment, data network equipment, etc.).

[0092] In some embodiments, the terms "access network device (AN device)", "radio access network device (RAN device)", "base station (BS)", "radio base station (radio base station)", "fixed station (fixed station)", "node (node)", "access point (access point)", "transmission point (TP)", "reception point (reception point, RP)", "transmission / reception point (transmission / reception point, TRP)", "panel (panel)", "antenna panel (antenna panel)", "antenna array (antenna array)", "cell (cell)", "macro cell (macro cell)", "small cell (small cell)", "femto cell (femto cell)", "pico cell (pico cell)", "sector (sector)", "cell group (cell)", "serving cell (serving cell)", "carrier (carrier)", "component carrier (component carrier)", "bandwidth part (bandwidth part, BWP)" and the like can be used interchangeably.

[0093] In some embodiments, the terms "terminal", "terminal device", "user equipment (UE)", "user terminal" "mobile station (MS)", "mobile terminal (MT)", subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client and the like may be used interchangeably.

[0094] In some embodiments, the access network device, the core network device, or the network device can be replaced by a terminal. For example, the various embodiments of the present disclosure can also be applied to a structure in which the access network device, the core network device, or the network device and the communication between the terminals is replaced by the communication between multiple terminals (for example, device-to-device (D2D), vehicle-to-everything (V2X), etc.). In this case, it can also be set as a structure in which the terminal has all or part of the functions of the access network device. In addition, terms such as "uplink" and "downlink" can also be replaced by terms corresponding to communication between terminals (for example, "side"). For example, uplink channels, downlink channels, etc. can be replaced by side channels, and uplinks, downlinks, etc. can be replaced by side links.

[0095] In some embodiments, the terminal may be replaced by an access network device, a core network device, or a network device. In this case, the access network device, the core network device, or the network device may also be configured to have a structure that has all or part of the functions of the terminal.

[0096] In some embodiments, the access network device may also be referred to as an access network function, an access network element, etc.

[0097] In some embodiments, the core network device may also be referred to as a core network function, a core network, a core network element, etc. Further, in some embodiments, each network device in the core network may also be referred to as a network function, a network element, etc.

[0098] In some embodiments, acquisition of data, information, etc. may comply with the laws and regulations of the country where the data is obtained.

[0099] In some embodiments, data, information, etc. may be obtained with the user's consent.

[0100] In addition, each element, each row, or each column in the table of the embodiments of the present disclosure may be implemented as an independent embodiment, and the combination of any elements, any rows, and any columns may also be implemented as an independent embodiment.

[0101] Fig. 1 is a schematic diagram of an architecture of a communication system provided according to an embodiment of the present disclosure. As shown in Fig. 1, a communication system 100 includes a terminal 101 and a network device 102. The network device 102 may be an access network device.

[0102] In some embodiments, the terminal 101 includes, for example, a mobile phone, a wearable device, an Internet of Things (IoT) device, a car with communication function, a smart car, a tablet computer (Pad), a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in self-driving, a wireless terminal device in remote medical surgery, a wireless terminal device in a smart grid, a wireless terminal device in transportation safety, a wireless terminal device in a smart city, and at least one of a wireless terminal device in a smart home, but is not limited thereto.

[0103] In some embodiments, the access network device, for example, may be a node or device that accesses a terminal to a wireless network. The access network device may include an evolved NodeB (eNB), a next generation evolved NodeB (ng-eNB), a next generation NodeB (gNB), a node B (NB), a home node B (HNB), a home evolved nodeB (HeNB), a wireless backhaul device, a radio network controller (RNC), a base station controller (BSC), a base transceiver station (BTS), a base band unit (BBU), a mobile switching center, a base station in a 6G communication system, an open base station (Open RAN), a cloud base station (Cloud RAN), a satellite base station, a base station in other communication systems, and at least one of an access node in a Wi-Fi system, but is not limited thereto.

[0104] In some embodiments, the technical solution of the present disclosure may be applicable to the Open RAN architecture. In this case, the interfaces within the network equipment involved in the embodiments of the present disclosure may become internal interfaces of the Open RAN, and the processes and information interactions between these internal interfaces may be implemented through software or programs.

[0105] In some embodiments, the access network device can be composed of a centralized unit (central unit, CU) and a distributed unit (distributed unit, DU), where the CU can also be called a control unit (control unit). The CU-DU structure can be used to split the protocol layer of the network device, with the functions of some protocol layers centrally controlled by the CU, and the remaining part or all of the protocol layer functions distributed in the DU, which is centrally controlled by the CU, but is not limited to this.

[0106] It can be understood that the communication system described in the embodiment of the present disclosure is for the purpose of more clearly illustrating the technical solution of the embodiment of the present disclosure, and does not constitute a limitation on the technical solution provided by the embodiment of the present disclosure. A person skilled in the art can know that with the evolution of the system architecture and the emergence of new business scenarios, the technical solution provided by the embodiment of the present disclosure is also applicable to similar technical problems.

[0107] The following embodiments of the present disclosure may be applied to the communication system 100 shown in FIG1 , or part of the subject, but are not limited thereto. The subjects shown in FIG1 are examples, and the communication system may include all or part of the subjects in FIG1 , or may include other subjects other than FIG1 , and the number and form of the subjects are arbitrary, and the connection relationship between the subjects is an example, and the subjects may be connected or disconnected, and the connection may be in any manner, which may be a direct connection or an indirect connection, and may be a wired connection or a wireless connection.

[0108] The embodiments of the present disclosure may be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 5G new radio (NR), future radio access (FRA), new radio (NR), new radio access (NX), future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, ultra-wideband (UWB), Bluetooth (registered trademark), public land mobile network (PLMN) network, device-to-device (D2D) system, machine-to-machine (M2M) system, Internet of Things (IoT) system, vehicle-to-everything (V2X), systems using other communication methods, next-generation systems based on them, etc. In addition, multiple systems can also be combined (for example, a combination of LTE or LTE-A and 5G, etc.) for application.

[0109] The millimeter wave band has a huge available bandwidth, can provide extremely high transmission rates, and has a short wavelength, which is conducive to the integration of antenna elements. These advantages make the research of millimeter wave wireless communication technology very popular. However, millimeter waves also have obvious defects, such as being easily blocked by obstacles and being very sensitive to PN.

[0110] In communication systems, network equipment usually adopts a centralized local oscillator architecture, that is, only one local oscillator (hereinafter referred to as local oscillator) is used, and the number of antennas is also small. All DMRS antenna ports are coherent ports, and only one PTRS port is required. Under the centralized local oscillator architecture, the impact of PN on OFDM signals is two-fold: one part is that all subcarrier signals have the same phase deflection, which is called common phase error (CPE); the other part is the interference of the value of the adjacent subcarrier affected by the phase noise superimposed on the current subcarrier signal, which is called inter-carrier interference (ICI).

[0111] However, with the development of wireless communication technology, the local oscillator architecture in the communication system has changed, and a distributed local oscillator architecture has been introduced. For example, a large-scale multiple-in multipleout (MIMO) OFDM system usually adopts a distributed local oscillator architecture. In a distributed local oscillator architecture, each RF chain is connected to a dedicated local oscillator, which causes the transmission signals of different RF chains to experience independent PN. In this way, the impact of PN on the OFDM signal is three parts: the first part is that all subcarriers have the same phase rotation, that is, CPE; the second part is that the signal on the adjacent m-th subcarrier affected by phase noise is added to the current k-th subcarrier, that is, ICI; the third part is that the current k-th subcarrier is subject to a phase deflection related to the subcarrier index k, that is, the phase deflection on different subcarriers is different, which is a new interference term. It can be seen that in the PN elimination algorithm of the high-frequency millimeter wave OFDM system under the distributed local oscillator architecture, it is not possible to only consider the elimination of CPE like the traditional centralized local oscillator architecture, and the arrangement of PTRS in the frequency domain should not be too sparse. In addition, millimeter waves will use larger subcarrier spacing, the time domain symbols will be greatly shortened, PN may no longer change symbol by symbol in the time domain, and the arrangement of PTRS in the time domain may no longer be too dense.

[0112] It can be seen that the density requirements of PTRS in the frequency domain and time domain are different for the centralized local oscillator architecture and the distributed local oscillator architecture. Therefore, for different local oscillator architectures, how the terminal can estimate and compensate for PN is an urgent problem to be solved.

[0113] Before further describing the embodiments of the present disclosure in detail, the nouns and terms involved in the embodiments of the present disclosure are described. The nouns and terms involved in the embodiments of the present disclosure are subject to the following interpretations.

[0114] 1. Phase Noise (PN)

[0115] PN is the phase error between the phase of the local oscillator and the phase of the actual carrier signal, which means that the phase of the sine wave generated by the local oscillator will change randomly over time and cause the power spectrum density of the generated carrier to expand. PN is usually characterized in the frequency domain. The PN size at a fixed frequency that deviates from the carrier frequency can be expressed as the ratio of the noise power in a 1Hz bandwidth at that frequency to the carrier signal power, in dBc / Hz.

[0116] In wireless communication systems, PN is introduced at the up-conversion and down-conversion locations due to imperfect oscillators. In the discrete time domain, the effects of PN are observed as multiplicative noise on OFDM signals, introduced when the baseband signal is multiplied by the high-frequency carrier generated by the oscillator for frequency up-conversion, and also introduced at the receiver during the down-conversion of the passband signal to baseband.

[0117] 2. Centralized local oscillator architecture

[0118] The central local oscillator architecture means that multiple RF chains (also called RF links) share the local oscillator, and the phase noise multiplied by the signals on all transmitting antennas is the same, and the phase noise multiplied by the signals on all receiving antennas is the same.

[0119] FIG2 is a schematic diagram of an OFDM system affected by PN under a centralized local oscillator architecture provided according to an embodiment of the present disclosure. As shown in FIG2 , assuming that each antenna represents a baseband port, the OFDM system uses multiple antennas to achieve multiplexing gain. The baseband processing unit 211 at the transmitting end is connected to multiple transmitting antennas 212, and the baseband processing unit 221 at the receiving end is connected to multiple receiving antennas 222. During the up-conversion process of the baseband signal, PN is introduced due to the non-ideal characteristics of the oscillator, and reaches the receiving end after passing through the multipath channel and being affected by additive white Gaussian noise. PN is also introduced during the down-conversion process at the receiving end. Due to the use of a centralized local oscillator architecture, the PN multiplied by the signals on all transmitting antennas (or receiving antennas) is the same. Then, the impact of PN on the transmitted signal includes CPE and ICI.

[0120] 3. Distributed Local Oscillator Architecture

[0121] The distributed local oscillator architecture means that multiple RF links have dedicated local oscillators one by one, and different local oscillators produce different PNs.

[0122] FIG3 is a schematic diagram of an OFDM system affected by PN under a distributed local oscillator architecture according to an embodiment of the present disclosure. As shown in FIG3, the PN multiplied by the signal on each transmitting antenna 212 (or receiving antenna 222) is no longer the same. For example, the PN corresponding to the transmitting antenna 212 is 1i (i=1, ..., m, ..., n, n is the number of transmitting antennas 212, m<n), the receiving antenna 222 corresponds to PN 2j (j=1, ..., m, ..., n, n is the number of receiving antennas 222, m<n), PN 1i or PN 2j They are independent of each other, which changes the impact of PN on the transmitted signal from the original two items (CPE and ICI) to three items (CPE, ICI and new interference items). The emergence of new interference items also makes PN under the distributed local oscillator architecture more difficult to track and compensate.

[0123] Fig. 4 is an exemplary interaction diagram of a communication method provided according to an embodiment of the present disclosure. The present disclosure embodiment relates to a communication method, which is applied to a communication system 100, including an access network device and a terminal. As shown in Fig. 4, the method includes steps S410 to S420.

[0124] In step S410, the network device sends configuration information.

[0125] In some embodiments, the network device may adopt a centralized local oscillator architecture, in which case N radio frequency chains share one local oscillator, where N is an integer greater than or equal to 2. Exemplarily, FIG5A is a schematic diagram of a structure of a network device provided according to an embodiment of the present disclosure. As shown in FIG5A, two radio frequency chains 51 of a network device (such as a base station) use one local oscillator PN. At this time, the network device requires one downlink PTRS port to estimate and compensate for the PN generated by the local oscillator.

[0126] In some embodiments, the network device may adopt a distributed local oscillator architecture, in which case N RF chains correspond to N local oscillators one by one. illustratively, FIG5B is another structural diagram of a network device provided according to an embodiment of the present disclosure. As shown in FIG5B, taking N=2 as an example, two RF chains 51 of a network device (such as a base station) use their respective local oscillators PN 1 and PN 2 , PN 1 and PN 2 In this case, the network device needs two downlink PTRS ports to estimate and compensate for the PN generated by each local oscillator. For example, N>2, the N RF chains of the network device (such as a base station) use their own local oscillator PN. 1 PN 2 ,…PN N , PN 1 PN 2 ,…PNN In this case, the network device needs N downstream PTRS ports to estimate and compensate for the PN generated by their respective local oscillators. In some embodiments, the value of N can be 2, 4, 8, 16, etc.

[0127] In some embodiments, the terminal receives configuration information.

[0128] In some embodiments, the configuration information is used to indicate the number of downstream PTRS ports.

[0129] In some embodiments, the downlink PTRS is used to track and compensate for the PN generated by one or N local oscillators in the network device.

[0130] In some embodiments, the configuration information includes at least one of the following: the maximum number of downlink PTRS ports, the number of TCI states, and the number of CDM groups corresponding to DMRS ports. Exemplarily, the maximum number of groups of downlink PTRS ports may be a high-level parameter maxNrofPorts.

[0131] It should be noted that the CDM group corresponding to the DMRS port may also be called a DMRS port group.

[0132] In some embodiments, the number of downlink PTRS ports may be indicated by radio resource control (RRC) configuration information, or may be indicated by both RRC configuration information and DCI.

[0133] In some embodiments, the network device sends downlink PTRS configuration information (ie, RRC configuration information).

[0134] In one embodiment, the downlink PTRS configuration information includes a maximum number of downlink PTRS ports.

[0135] In one embodiment, the downlink PTRS configuration information includes the maximum number of downlink PTRS ports and the number of CDM groups corresponding to the DMRS ports.

[0136] In some embodiments, the network device sends DCI. In one embodiment, the DCI includes the number of TCI states.

[0137] In some embodiments, under the above-mentioned centralized local oscillator architecture, the network device may have one downstream PTRS port. Then, the network device may use one downstream PTRS port to send the downstream PTRS. At this time, the number of downstream PTRS ports indicated by the configuration information is 1.

[0138] In some embodiments, under the above-mentioned distributed local oscillator architecture, the network device may have N downstream PTRS ports. Then, the network device may use N downstream PTRS ports to send downstream PTRS. At this time, the number of downstream PTRS ports indicated by the configuration information is N.

[0139] In some embodiments, since the number of PTRS ports is related to the number of PN sources. In the case of a distributed local oscillator architecture, the number of PN sources can be N, such as 2, 4, 8, 16, etc. At this time, the number of downlink PTRS ports can be N, such as 2, 4, 8, 16, etc. Then, when sending a downlink PTRS, the network device can use 2 downlink PTRS ports, and can also use 4 downlink PTRS ports, 8 downlink PTRS ports, 16 downlink PTRS ports, etc. Of course, with the evolution of the communication system, the number of antennas in the communication device can be further increased, and a larger-scale antenna array can be used. Then, the number N of the corresponding downlink PTRS ports can also be increased accordingly. Therefore, the embodiment of the present disclosure does not specifically limit the number of downlink PTRS ports.

[0140] In step S420, the terminal determines the time-frequency domain density configuration of the downlink PTRS based on the number of downlink PTRS ports.

[0141] In some embodiments, the terminal receives configuration information and determines the number of downlink PTRS ports according to the configuration information. In one embodiment, the terminal determines the number of downlink PTRS ports according to the maximum number of downlink PTRS ports, the number of TCI states, and the number of CDM groups corresponding to the DMRS ports.

[0142] In some embodiments, when the maximum number of downlink PTRS ports is configured as 1, the terminal determines that the number of downlink PTRS ports is 1.

[0143] In some embodiments, when the maximum number of downlink PTRS ports is configured as 2, and at least one of the number of TCI states and the number of CDM groups corresponding to the DMRS ports is equal to 1, the terminal determines that the number of downlink PTRS ports is 1.

[0144] In some embodiments, when the terminal determines that the number of downlink PTRS ports is 1, it considers that the network device adopts a centralized local oscillator architecture.

[0145] In some embodiments, when the terminal determines that the number of downlink PTRS ports is 1, the downlink PTRS port is associated with the DMRS port with the lowest index among the DMRS ports allocated for the physical downlink shared channel (PDSCH). In some embodiments, when the maximum number of downlink PTRS ports is configured as 2, the number of TCI states is equal to 2, and the number of CDM groups corresponding to the DMRS ports is equal to 2, the terminal determines that the number of downlink PTRS ports is 2.

[0146] In some embodiments, when the terminal determines that the number of downlink PTRS ports is 2, it considers that the network device adopts a distributed local oscillator architecture.

[0147] In some embodiments, when the terminal determines that the number of downlink PTRS ports is 2, the two downlink PTRS ports are respectively associated with the lowest index DMRS ports in the CDM group corresponding to the DMRS ports of the indicated two TCI states (such as the first TCI state and the second TCI state). Exemplarily, in one case, the high-level parameter maxNrofPorts is set to 1, at which time the terminal determines that the number of downlink PTRS ports is 1. In another case, the high-level parameter maxNrofPorts is set to 2, and the number of TCI states indicated by the DCI and the number of CDM groups corresponding to the DMRS ports are both 2, at which time the terminal determines that the downlink PTRS port is 2. Then. The terminal will receive the downlink PTRS sent by the two downlink PTRS ports. The two downlink PTRS ports are respectively associated with the lowest index DMRS ports in the CDM group corresponding to the DMRS ports corresponding to the two TCI states.

[0148] It should be noted that the above-mentioned "the lowest index DMRS port in the CDM group corresponding to the DMRS ports of the two indicated TCI states" can also be described as: "the lowest index DMRS port among the DMRS ports of the two indicated TCI states", "the lowest index DMRS port among the DMRS ports corresponding to the indicated first TCI state and the second TCI state", etc., and the embodiments of the present disclosure do not make specific limitations.

[0149] Exemplarily, in one case, the high-level parameter maxNrofPorts is configured to 2, the number of TCI states indicated by the DCI is 1, and the number of CDM groups corresponding to the DMRS port is 2, at this time, the terminal determines that the number of downlink PTRS ports is 1. In another case, the high-level parameter maxNrofPorts is set to 2, the number of TCI states indicated by the DCI is 2, and the number of CDM groups corresponding to the DMRS port is 1, at this time, the terminal determines that the number of downlink PTRS ports is 1.

[0150] In some embodiments, when the maximum number of downlink PTRS ports is configured as 4, and at least one of the number of TCI states and the number of CDM groups corresponding to the DMRS ports is equal to 1 or 2, the terminal determines that the number of downlink PTRS ports is 1 or 2.

[0151] In some embodiments, when the maximum number of downlink PTRS ports is configured as 4, the number of TCI states is equal to 4, and the number of CDM groups corresponding to the DMRS ports is equal to 4, the terminal determines that the number of downlink PTRS ports is 4.

[0152] In some embodiments, when the terminal determines that the number of downlink PTRS ports is 4, the 4 downlink PTRS ports are respectively associated with the lowest index DMRS ports in the CDM group corresponding to the 4 DMRS ports indicating the TCI state.

[0153] Exemplarily, in one case, the high-level parameter maxNrofPorts is set to 4, and the number of TCI states indicated by the DCI and the number of CDM groups corresponding to the DMRS port are both 4. In this case, the terminal determines that the downlink PTRS port is 4. Then. The terminal will receive the downlink PTRS sent by 4 downlink PTRS ports. These 4 downlink PTRS ports are respectively associated with the lowest index DMRS port in the CDM group corresponding to the DMRS port corresponding to the 4 TCI states. In another case, the high-level parameter maxNrofPorts is set to 4, the number of TCI states indicated by the DCI is 1 or 2, and the number of CDM groups corresponding to the DMRS port is 4. In this case, the terminal determines that the number of downlink PTRS ports is 1 or 2. In yet another case, the high-level parameter maxNrofPorts is set to 4, the number of TCI states indicated by the DCI is 4, and the number of CDM groups corresponding to the DMRS port is 1 or 2. In this case, the terminal determines that the number of downlink PTRS ports is 1 or 2.

[0154] In some embodiments, when the maximum number of downlink PTRS ports is configured to be 8, and at least one of the number of TCI states and the number of CDM groups corresponding to the DMRS ports is equal to 1, 2 or 4, the terminal determines that the number of downlink PTRS ports is 1, 2 or 4.

[0155] In some embodiments, when the maximum number of downlink PTRS ports is configured to be 8, the number of TCI states is equal to 8, and the number of CDM groups corresponding to the DMRS ports is equal to 8, the terminal determines that the number of downlink PTRS ports is 8.

[0156] In some embodiments, when the terminal determines that the number of downlink PTRS ports is 8, the 8 downlink PTRS ports are respectively associated with the lowest index DMRS ports in the CDM group corresponding to the 8 DMRS ports indicating the TCI state.

[0157] Exemplarily, in one case, the high-level parameter maxNrofPorts is set to 8, and the number of TCI states indicated by the DCI and the number of CDM groups corresponding to the DMRS port are both 8. In this case, the terminal determines that the downlink PTRS port is 8. Then. The terminal will receive the downlink PTRS sent by 8 downlink PTRS ports. These 8 downlink PTRS ports are respectively associated with the lowest index DMRS port in the CDM group corresponding to the DMRS port corresponding to the 8 TCI states. In another case, the high-level parameter maxNrofPorts is set to 8, the number of TCI states indicated by the DCI is 1, 2 or 4, and the number of CDM groups corresponding to the DMRS port is 8. In this case, the terminal determines that the number of downlink PTRS ports is 1, 2 or 4. In yet another case, the high-level parameter maxNrofPorts is set to 8, the number of TCI states indicated by the DCI is 8, and the number of CDM groups corresponding to the DMRS port is 1, 2 or 4. In this case, the terminal determines that the number of downlink PTRS ports is 1, 2 or 4.

[0158] In some embodiments, for different numbers of PTRS ports, the time-frequency domain density configuration of the downlink PTRS is different. The terminal can determine the corresponding time-frequency domain density configuration of the downlink PTRS according to the number of downlink PTRS ports.

[0159] In some embodiments, when the number of downlink PTRS ports is 1, the time-frequency domain density configuration of the downlink PTRS may be a first time-frequency domain density configuration. Since the network device adopts a centralized local oscillator architecture when the number of downlink PTRS ports is 1, the downlink PTRS with the first time-frequency domain density configuration has a smaller frequency domain density and a larger time domain density.

[0160] In some embodiments, when the number of downlink PTRS ports is N, the time-frequency domain density configuration of the downlink PTRS may be a second time-frequency domain density configuration. Since the network device adopts a distributed local oscillator architecture when the number of downlink PTRS ports is N, the downlink PTRS with the second time-frequency domain density configuration has a larger frequency domain density and a smaller time domain density.

[0161] In some embodiments, the time-frequency domain density configuration of the downlink PTRS includes time-domain density and frequency-domain density. The first time-frequency domain density configuration includes a first time-domain density and a first frequency-domain density. The second time-frequency domain density configuration includes a second time-domain density and a second frequency-domain density.

[0162] In some embodiments, the first time-frequency domain density configuration includes a first time-domain density and a first frequency-domain density, wherein the first time-domain density is one of the following: 4, 2, 1; and the first frequency-domain density is one of the following: 2, 4.

[0163] In some embodiments, the terminal may determine the first time domain density according to the MSC scheduled by the downlink PTRS. Exemplarily, the mapping relationship between the MSC scheduled by the downlink PTRS and the first time domain density may be as shown in Table 1 below. MSC The value of the MSC for downlink PTRS scheduling, ptrs-MCS i (i=1, 2, 3, 4) are the first MSC threshold, the second MCS threshold, the third MCS threshold and the fourth MCS threshold respectively.

[0164] In some embodiments, the terminal may determine the first time domain density according to the bandwidth of the downlink PTRS scheduling. Exemplarily, the mapping relationship between the bandwidth of the downlink PTRS scheduling and the first frequency domain density may be as shown in Table 2 below. RB is the bandwidth value of downlink PTRS scheduling, N Rbi (i=0, 1) are the first bandwidth threshold and the second bandwidth threshold respectively.

[0165] Table 1

[0166] Table 2

[0167] In some embodiments, the second time-frequency domain density configuration includes a second time-domain density and a second frequency-domain density, wherein the second time-domain density is one of the following: 6, 4, 2; and the second frequency-domain density is one of the following: 1, 2.

[0168] In some embodiments, the terminal may determine the second time domain density according to the MSC scheduled by the downlink PTRS. Exemplarily, the mapping relationship between the MSC scheduled by the downlink PTRS and the second time domain density may be as shown in Table 3 below.

[0169] In some embodiments, the terminal may determine the second time domain density according to the bandwidth scheduled by the downlink PTRS. Exemplarily, the mapping relationship between the bandwidth scheduled by the downlink PTRS and the second frequency domain density may be as shown in Table 4 below.

[0170] Table 3

[0171] Table 4

[0172] In some embodiments, the above table can be an RRC table, that is, the time-frequency domain density of the downlink PTRS is configured to the terminal through RRC signaling. In this way, there is no need to add additional fields in the DCI. Only two RRC tables need to be added to achieve the indication of the PTRS time-frequency domain density range corresponding to different numbers of PTRS ports under different local oscillator architectures, and the change to the communication protocol is relatively small. In addition, by adding a new RRC table, different PTRS time-frequency domain density configuration ranges can be defined for different scenarios, which has strong scalability.

[0173] The communication method involved in the embodiment of the present disclosure may include at least one of step S410 to step S420. For example, step S410 may be implemented as an independent embodiment. For example, step S420 may be implemented as an independent embodiment. It should be noted that the possible independent embodiments consisting of one or more steps in step S410 to step S420 are not limited thereto.

[0174] In the disclosed embodiment, the network device indicates the number of downlink PTRS ports to the terminal, so that the terminal can determine the time-frequency domain density configuration of the corresponding downlink PTRS according to the number of downlink PTRS ports. The time-frequency domain density configuration at this time is more conducive to the terminal to accurately estimate and compensate for PN, thereby improving the overall performance of the system.

[0175] Furthermore, in the disclosed embodiments, under different local oscillator architectures, due to the different effects of PN on the transmitted signal, the time-frequency domain density configuration range of the downlink PTRS required by the terminal for PN estimation and compensation is different. Under the centralized local oscillator architecture, since CPE on all subcarriers occupies the majority of the phase noise, the frequency domain density of the PTRS required for PN elimination is relatively small, while the time domain density is large. Under the distributed local oscillator architecture, since the phase deflections caused by the new interference items on different subcarriers are different, only CPE cannot be eliminated, so the frequency domain density of the PTRS required for PN elimination is large, while the time domain density can be reduced due to the shortening of the symbol length. By configuring different time-frequency domain density configurations for different local oscillator architectures, the terminal can estimate and compensate for PN more accurately, further improving system performance.

[0176] In some embodiments, the names of information, etc. are not limited to the names described in the embodiments, "information", "message" or "information".

[0177] The terms "message", "signal", "signaling", "report", "configuration", "indication", "instruction", "command", "channel", "parameter", "domain", "field", "symbol", "symbol", "code element", "codebook", "codeword", "codepoint", "bit", "data", "program", "chip" and the like are used interchangeably.

[0178] In some embodiments, terms such as "moment", "time point", "time", and "time position" can be interchangeable, and terms such as "duration", "period", "time window", "window", and "time" can be interchangeable.

[0179] In some embodiments, "obtain", "obtain", "get", "receive", "transmit", "bidirectional transmission", "send and / or receive" can be interchangeable, and can be interpreted as receiving from other entities, obtaining from protocols, obtaining from high levels, obtaining by self-processing, autonomous implementation, etc.

[0180] In some embodiments, terms such as "send", "transmit", "report", "send", "transmit", "bidirectional transmission", "send and / or receive" can be used interchangeably.

[0181] In some embodiments, terms such as "certain", "preset", "preset", "setting", "indicated", "some", "any", and "first" can be interchangeable, and "specific A", "preset A", "preset A", "setting A", "indicated A", "some A", "any A", and "first A" can be interpreted as A pre-defined in a protocol, etc., or as A obtained through setting, configuration, or indication, etc., and can also be interpreted as specific A, some A, any A, or first A, etc., but is not limited to this.

[0182] In some embodiments, the determination or judgment can be performed by a value represented by 1 bit (0 or 1), by a true or false value (Boolean value) represented by true or false, or by comparison of numerical values ​​(for example, comparison with a predetermined value), but is not limited to this.

[0183] Fig. 6 is an exemplary flow chart of a communication method performed by a network device side according to an embodiment of the present disclosure. The present disclosure embodiment relates to a communication method, which is applied to a network device. As shown in Fig. 6, the method includes step S610.

[0184] In step S610, configuration information is sent.

[0185] The optional implementation of step S610 can refer to the optional implementation of step S410 in FIG. 4 and other related parts in the embodiment involved in FIG. 4 , which will not be described in detail here.

[0186] In some embodiments, the network device (such as an access network device) sends configuration information to the terminal, but is not limited thereto, and the configuration information may also be sent to other entities.

[0187] Fig. 7 is an exemplary flow chart of a communication method performed by a terminal side according to an embodiment of the present disclosure. The present disclosure embodiment relates to a communication method, which is applied to a terminal. As shown in Fig. 7, the method includes steps S710 to S720.

[0188] In step S710, configuration information is received.

[0189] The optional implementation of step S710 can refer to the optional implementation of step S410 in FIG. 4 , and other related parts in the embodiment involved in FIG. 4 , which will not be described in detail here.

[0190] In some embodiments, the terminal receives configuration information sent by a network device (such as an access network device), but is not limited thereto, and may also receive configuration information sent from other entities.

[0191] In step S720, the time-frequency domain density configuration of the downlink PTRS is determined based on the number of downlink PTRS ports.

[0192] The optional implementation of step S720 can refer to the optional implementation of step S420 in Figure 4 and other related parts in the embodiment involved in Figure 4, which will not be repeated here.

[0193] In the communication method involved in the embodiment of the present disclosure, in order to solve the problem of "indicating the number of PTRS ports" (problem 1) and "indicating the density range of each PTRS in the time-frequency domain" (problem 2) under different local oscillator architectures, the embodiment of the present disclosure provides specific solutions respectively, so that the configuration of PTRS is more conducive to the estimation and compensation of PN under the current local oscillator architecture, and improves the overall performance of the system. The technical solutions and specific scenarios for solving the two problems are given below:

[0194] In some embodiments, the distributed local oscillator architecture in Problem 1 needs to indicate the number of PTRS ports and the associated DMRS ports to the mid-terminal during downlink transmission. This problem occurs because the number of PTRS ports is related to the number of PN sources. When there are multiple independent PN sources, i.e., multiple local oscillators under the distributed local oscillator architecture, each PN source requires a PTRS port for PN estimation.

[0195] Then, the high-level parameter maxNrofPorts configures the maximum number of downlink PTRS antenna ports in each TCI state. If maxNrofPorts is set to 1, the number of scheduled PTRS ports is 1. If maxNrofPorts is set to 2, and the number of TCI states indicated by the DCI and the number of CDM groups corresponding to the DMRS ports are both 2, the terminal will receive two PTRS ports, which are respectively associated with the lowest indexed DMRS ports in the DMRS port groups corresponding to the 2 TCI states. If maxNrofPorts is set to 2, the number of TCI states indicated by the DCI is 2, but the number of CDM groups corresponding to the DMRS ports is 1, the terminal will receive 1 PTRS port, which is associated with the lowest indexed DMRS port in the DMRS ports allocated for PDSCH.

[0196] Here are some specific examples:

[0197] On the network device (such as access network device) side, the distributed local oscillator architecture shown in FIG. 5B is taken as an example. Two RF chains use their own local oscillators, so two PTRS ports are required in the downlink to estimate and compensate for the PN generated by their own local oscillators. The high-level parameter maxNrofPorts is set to 2, and the number of TCI states indicated by the DCI and the number of CDM groups corresponding to the DMRS port are both 2. The terminal will receive two PTRS ports, which are respectively associated with the lowest index DMRS port in the DMRS port groups corresponding to the two TCI states (which can be recorded as the first DMRS port group and the second DMRS port group).

[0198] In some embodiments, in question 2, different PTRS time-frequency domain density configuration ranges are required under different local oscillator architectures. The solution is to add new PTRS time-frequency domain density configuration tables for the distributed local oscillator architecture in the protocol, such as Table 3 and Table 4 above. The terminal determines whether to search for the RRC table corresponding to the centralized local oscillator architecture (such as Table 1 and Table 2 above, you can refer to Table 5.1.6.3-1-1 and Table 5.1.6.3-2-1 in 3GPP TS 38.214) or the RRC table corresponding to the distributed local oscillator architecture (such as Table 3 and Table 4 above) according to the number of downlink PTRS ports, and then searches for the PTRS time-frequency domain density in the corresponding table in combination with the scheduled MCS and the scheduled bandwidth.

[0199] Here are some examples:

[0200] The network device (such as access network device) side still takes the distributed local oscillator architecture shown in Figure 5B as an example. The two RF chains use their own local oscillators, the high-level parameter maxNrofPorts is set to 2, and the number of TCI states indicated by the DCI and the number of CDM groups corresponding to the DMRS port are both 2. The terminal will receive two PTRS ports, which are respectively associated with the lowest index DMRS port in the DMRS port groups corresponding to the two DMRS port groups indicating the TCI states (which can be recorded as the first DMRS port group and the second DMRS port group).

[0201] When the terminal learns that there are two PTRS ports that need to be received, it believes that the network device side is a distributed local oscillator architecture, so the time-frequency domain density of the two PTRS ports will be determined by looking up Table 3 and Table 4 according to the scheduled MCS and the scheduled bandwidth.

[0202] In the embodiments of the present disclosure, part or all of the steps and their optional implementations may be arbitrarily combined with part or all of the steps in other embodiments, or may be arbitrarily combined with optional implementations of other embodiments.

[0203] The embodiments of the present disclosure also provide a device for implementing any of the above methods. For example, the embodiments of the present disclosure provide a device. The above device includes a unit or module for implementing each step performed by the terminal in any of the above methods. For another example, another device is also provided, including a unit or module for implementing each step performed by a network device (e.g., an access network device, or a core network device, etc.) in any of the above methods.

[0204] It should be understood that the division of the units or modules in the above devices is only a division of logical functions, and in actual implementation, they can be fully or partially integrated into one physical entity, or they can be physically separated. In addition, the units or modules in the device can be implemented in the form of a processor calling software: for example, the device includes a processor, the processor is connected to a memory, and instructions are stored in the memory. The processor calls the instructions stored in the memory to implement any of the above methods or implement the functions of the units or modules of the above devices, wherein the processor is, for example, a general-purpose processor, such as a central processing unit (CPU) or a microprocessor, and the memory is a memory inside the device or a memory outside the device. Alternatively, the units or modules in the device can be implemented in the form of hardware circuits, and the functions of some or all of the units or modules can be realized by designing the hardware circuits. The above hardware circuits can be understood as one or more processors; for example, in one implementation, the above hardware circuit is an application-specific integrated circuit (ASIC), and the functions of some or all of the above units or modules are realized by designing the logical relationship of the components in the circuit; for example, in another implementation, the above hardware circuit can be realized by a programmable logic device (PLD), taking a field programmable gate array (FPGA) as an example, which can include a large number of logic gate circuits, and the connection relationship between the logic gate circuits is configured by a configuration file, so as to realize the functions of some or all of the above units or modules. All units or modules of the above devices can be realized in the form of a processor calling software, or in the form of a hardware circuit, or in part by a processor calling software, and the rest by a hardware circuit.

[0205] In the disclosed embodiments, the processor is a circuit with signal processing capability. In one implementation, the processor may be a circuit with instruction reading and running capability, such as a central processing unit (CPU), a microprocessor, a graphics processing unit (GPU) (which may be understood as a microprocessor), or a digital signal processor (DSP), etc.; in another implementation, the processor may implement certain functions through the logical relationship of a hardware circuit, and the logical relationship of the above hardware circuit is fixed or reconfigurable, such as a hardware circuit implemented by a processor as an application-specific integrated circuit (ASIC) or a programmable logic device (PLD), such as an FPGA. In a reconfigurable hardware circuit, the process of the processor loading a configuration document to implement the hardware circuit configuration may be understood as the process of the processor loading instructions to implement the functions of some or all of the above units or modules. In addition, it can also be a hardware circuit designed for artificial intelligence, which can be understood as an ASIC, such as a neural network processing unit (NPU), a tensor processing unit (TPU), a deep learning processing unit (DPU), etc.

[0206] FIG8 is an exemplary structural diagram of a communication device provided according to an embodiment of the present disclosure. As shown in FIG8 , the communication device 800 may include at least one of a receiving module 801 , a processing module 802 , and a sending module 803 .

[0207] In some embodiments, the communication device 800 may be arranged in a network device. In this case, the communication device 800 includes a sending module 803 .

[0208] In some embodiments, the sending module 803 is configured to send configuration information, where the configuration information is used to indicate the number of downlink PTRS ports, and the downlink PTRS is used to estimate and compensate for PN generated by a local oscillator used by at least one RF chain.

[0209] In some embodiments, the configuration information includes at least one of the following: the maximum number of downlink PTRS ports; the number of TCI states; the number of CDM groups corresponding to the DMRS ports.

[0210] In some embodiments, the sending module 803 is configured to perform at least one of the following: sending downlink PTRS configuration information, the downlink PTRS configuration information includes the maximum number of downlink PTRS ports and / or the number of CDM groups corresponding to the DMRS ports; sending DCI, DCI is used to indicate the number of TCI states.

[0211] In some embodiments, the number of downlink PTRS ports is 1 or N, where N is an integer greater than or equal to 2.

[0212] In some embodiments, when the maximum number of downstream PTRS ports is configured to be 1, the number of downstream PTRS ports is 1.

[0213] In some embodiments, when the maximum number of downlink PTRS ports is configured as N and N=2, when the number of TCI states is equal to 2 and the number of CDM groups corresponding to the DMRS ports is equal to 2, the number of downlink PTRS ports is 2; or, when the number of TCI states is equal to 1 and / or the number of CDM groups corresponding to the DMRS ports is equal to 1, the number of downlink PTRS ports is 1.

[0214] In some embodiments, when the number of downlink PTRS ports is 2, the two downlink PTRS ports are respectively associated with the lowest index DMRS ports in the two DMRS port groups indicating the TCI state.

[0215] In some embodiments, the number of downlink PTRS ports is 1 corresponding to a first time-frequency domain density configuration; or, the number of downlink PTRS ports is N corresponding to a second time-frequency domain density configuration.

[0216] In some embodiments, the second time-frequency domain density configuration includes: time domain density and frequency domain density; the value of the time domain density is one of the following: 6, 4, 2; the value of the frequency domain density is one of the following: 1, 2.

[0217] In some embodiments, the second time-frequency domain density configuration includes at least one of the following: the MCS of the downlink PTRS scheduling is greater than or equal to the first MCS threshold and less than the second MCS threshold, and the time domain density value is 6; the MCS of the downlink PTRS scheduling is greater than or equal to the second MCS threshold and less than the third MCS threshold, and the time domain density value is 4; the MCS of the downlink PTRS scheduling is greater than or equal to the third MCS threshold and less than the fourth MCS threshold, and the time domain density value is 2.

[0218] In some embodiments, the second time-frequency domain density configuration includes at least one of the following: the bandwidth of the downlink PTRS scheduling is greater than or equal to the first bandwidth threshold and less than the second bandwidth threshold, and the value of the frequency domain density is 1; the bandwidth of the downlink PTRS scheduling is greater than or equal to the second bandwidth threshold and less than the third bandwidth threshold, and the value of the frequency domain density is 2.

[0219] In some embodiments, the communication device 800 may be arranged in a terminal. In this case, the communication device 800 includes a receiving module 801 and a processing module 802 .

[0220] In some embodiments, the receiving module 801 is configured to receive configuration information, where the configuration information is used to indicate the number of downlink PTRS ports; the processing module 802 is configured to determine the time-frequency domain density configuration of the downlink PTRS based on the number of downlink PTRS ports; wherein the downlink PTRS is used to estimate and compensate for the PN generated by the local oscillator used by at least one RF chain.

[0221] In some embodiments, the configuration information includes at least one of the following: the maximum number of downlink PTRS ports; the number of TCI states; the number of code CDM groups corresponding to the DMRS ports.

[0222] In some embodiments, the receiving module 801 is configured to perform at least one of the following: receiving downlink PTRS configuration information, the downlink PTRS configuration information including the maximum number of downlink PTRS ports and / or the number of CDM groups corresponding to the DMRS ports; receiving DCI, the DCI including the number of TCI states.

[0223] In some embodiments, the number of downlink PTRS ports is 1 or N, where N is an integer greater than or equal to 2.

[0224] In some embodiments, when the maximum number of downstream PTRS ports is configured as 1, the number of downstream PTRS ports is configured as 1.

[0225] In some embodiments, when the maximum number of downlink PTRS ports is configured as N and N=2, when the number of TCI states is equal to 2 and the number of CDM groups corresponding to the DMRS ports is equal to 2, the number of downlink PTRS ports is 2; or, when the number of TCI states is equal to 1 and / or the number of CDM groups corresponding to the DMRS ports is equal to 1, the number of downlink PTRS ports is 1.

[0226] In some embodiments, when the number of downlink PTRS ports is 2, the two downlink PTRS ports are respectively associated with the lowest index DMRS ports in the two DMRS port groups indicating the TCI state.

[0227] In some embodiments, the processing module 802 is configured to, when the number of downlink PTRS ports is 1, determine the time-frequency domain density configuration as the first time-frequency domain density configuration; or, when the number of downlink PTRS ports is N, determine the time-frequency domain density configuration as the second time-frequency domain density configuration.

[0228] In some embodiments, the second time-frequency domain density configuration includes: time domain density and frequency domain density; the value of the time domain density is one of the following: 6, 4, 2; the value of the frequency domain density is one of the following: 1, 2.

[0229] In some embodiments, the second time-frequency domain density configuration includes at least one of the following: the MCS of the downlink PTRS scheduling is greater than or equal to the first MCS threshold and less than the second MCS threshold, and the time domain density value is 6; the MCS of the downlink PTRS scheduling is greater than or equal to the second MCS threshold and less than the third MCS threshold, and the time domain density value is 4; the MCS of the downlink PTRS scheduling is greater than or equal to the third MCS threshold and less than the fourth MCS threshold, and the time domain density value is 2.

[0230] In some embodiments, the second time-frequency domain density configuration includes at least one of the following: the bandwidth of the downlink PTRS scheduling is greater than or equal to the first bandwidth threshold and less than the second bandwidth threshold, and the value of the frequency domain density is 1; the bandwidth of the downlink PTRS scheduling is greater than or equal to the second bandwidth threshold and less than the third bandwidth threshold, and the value of the frequency domain density is 2.

[0231] Figure 9 is a schematic diagram of a structure of a communication device provided according to an embodiment of the present disclosure. The communication device 900 may be a network device (e.g., an access network device), or a terminal, or a chip, a chip system, or a processor that supports the network device to implement any of the above methods, or a chip, a chip system, or a processor that supports the terminal to implement any of the above communication methods. The communication device 900 may be used to implement the communication method described in the above method embodiment, and the details may refer to the description in the above method embodiment.

[0232] As shown in FIG9 , the communication device 900 includes one or more processors 901. The processor 901 may be a general-purpose processor or a dedicated processor, for example, a baseband processor or a central processing unit. The baseband processor may be used to process the communication protocol and the communication data, and the central processing unit may be used to control the communication device (such as a base station, a baseband chip, a terminal device, a terminal device chip, a DU or a CU, etc.), execute a program, and process the data of the program. The processor 901 is used to call instructions so that the communication device 900 executes any of the above communication methods.

[0233] In some embodiments, the communication device 900 further includes one or more memories 902 for storing instructions. Optionally, all or part of the memory 902 may also be outside the communication device 900.

[0234] In some embodiments, the communication device 900 further includes one or more transceivers 903. When the communication device 900 includes one or more transceivers 903, the communication steps such as sending and receiving in the above method are performed by the transceiver 903, and the other steps are performed by the processor 901.

[0235] In some embodiments, the transceiver may include a receiver and a transmitter, and the receiver and the transmitter may be separate or integrated. Optionally, the terms such as transceiver, transceiver unit, transceiver, transceiver circuit, etc. may be replaced with each other, the terms such as transmitter, transmission unit, transmitter, transmission circuit, etc. may be replaced with each other, and the terms such as receiver, receiving unit, receiver, receiving circuit, etc. may be replaced with each other.

[0236] Optionally, the communication device 900 further includes one or more interface circuits 904, which are connected to the memory 902. The interface circuit 904 can be used to receive signals from the memory 902 or other devices, and can be used to send signals to the memory 902 or other devices. For example, the interface circuit 904 can read instructions stored in the memory 902 and send the instructions to the processor 901.

[0237] The communication device 900 described in the above embodiment may be an access network device, a core network device, an external network device or a terminal, but the scope of the communication device 900 described in the embodiment of the present disclosure is not limited thereto, and the structure of the communication device 900 may not be limited by FIG. 9. The communication device may be an independent device or may be part of a larger device. For example, the communication device may be: (1) an independent integrated circuit IC, or a chip, or a chip system or subsystem; (2) a collection of one or more ICs, optionally, the above IC collection may also include a storage component for storing data and programs; (3) an ASIC, such as a modem; (4) a module that can be embedded in other devices; (5) a receiver, a terminal device, an intelligent terminal device, a cellular phone, a wireless device, a handheld device, a mobile unit, a vehicle-mounted device, a network device, a cloud device, an artificial intelligence device, etc.; (6) other devices.

[0238] The embodiment of the present disclosure also provides a storage medium, on which instructions are stored. When the instructions are executed on the communication device 900, the communication device 900 executes any one of the above communication methods. Optionally, the storage medium is an electronic storage medium. Optionally, the storage medium is a computer-readable storage medium, but it can also be a storage medium readable by other devices. Optionally, the storage medium can be a non-transitory storage medium, but it can also be a temporary storage medium.

[0239] The embodiment of the present disclosure further provides a program product, and when the program product is executed by the communication device 900, the communication device 900 executes any one of the above communication methods. Optionally, the program product is a computer program product.

[0240] The embodiment of the present disclosure also provides a computer program, which, when executed on a computer, enables the computer to execute any one of the above communication methods.

[0241] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. The present disclosure is intended to cover any variations, uses or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The description and examples are to be considered exemplary only, and the true scope and spirit of the present invention are indicated by the following claims.

[0242] It should be understood that the present invention is not limited to the exact construction that has been described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

A communication method, performed by a network device, comprising: Configuration information is sent, where the configuration information is used to indicate the number of downlink phase tracking reference signal PTRS ports, where the downlink PTRS is used to estimate and compensate for phase noise PN generated by a local oscillator used by at least one radio frequency chain. The method according to claim 1, wherein The configuration information includes at least one of the following: the maximum number of downlink PTRS ports; the number of transmission configuration indication TCI states; and the number of code division multiplexing CDM groups corresponding to demodulation reference signal DMRS ports. The method according to claim 2, wherein The sending of configuration information includes at least one of the following: sending downlink PTRS configuration information, wherein the downlink PTRS configuration information includes a maximum number of downlink PTRS ports and / or a number of CDM groups corresponding to the DMRS ports; Send downlink control information DCI, where the DCI is used to indicate the number of the TCI states. The method according to any one of claims 1 to 3, wherein: The number of the downlink PTRS ports is 1 or N, where N is an integer greater than or equal to 2. The method according to claim 4, wherein When the maximum number of downstream PTRS ports is configured as 1, the number of downstream PTRS ports is 1. The method according to claim 4, wherein When the maximum number of downlink PTRS ports is configured to N and N is equal to 2, when the number of TCI states is equal to 2 and the number of CDM groups corresponding to the DMRS ports is equal to 2, the number of downlink PTRS ports is 2; or, when the number of TCI states is equal to 1 and / or the number of CDM groups corresponding to the DMRS ports is equal to 1, the number of downlink PTRS ports is 1. The method according to claim 6, wherein When the number of the downlink PTRS ports is 2, the two downlink PTRS ports are respectively associated with the lowest index DMRS ports in the two DMRS port groups indicating the TCI state. The method according to any one of claims 4 to 7, wherein: The number of the downlink PTRS ports is 1, corresponding to a first time-frequency domain density configuration; or, the number of the downlink PTRS ports is N, corresponding to a second time-frequency domain density configuration. The method according to claim 8, wherein The second time-frequency domain density configuration includes: time domain density and frequency domain density; the value of the time domain density is one of the following: 6, 4, 2; the value of the frequency domain density is one of the following: 1, 2. The method according to claim 9, wherein The second time-frequency domain density configuration includes at least one of the following: the modulation and coding strategy MCS of the downlink PTRS scheduling is greater than or equal to the first MCS threshold and less than the second MCS threshold, and the value of the time domain density is 6; the MCS of the downlink PTRS scheduling is greater than or equal to the second MCS threshold and less than the third MCS threshold, and the value of the time domain density is 4; the MCS of the downlink PTRS scheduling is greater than or equal to the third MCS threshold and less than the fourth MCS threshold, and the value of the time domain density is 2. The method according to claim 9, wherein The second time-frequency domain density configuration includes at least one of the following: the bandwidth of the downlink PTRS scheduling is greater than or equal to the first bandwidth threshold and less than the second bandwidth threshold, and the value of the frequency domain density is 1; the bandwidth of the downlink PTRS scheduling is greater than or equal to the second bandwidth threshold and less than the third bandwidth threshold, and the value of the frequency domain density is 2. A communication method, executed by a terminal, comprising: Receive configuration information, where the configuration information is used to indicate the number of downlink phase tracking reference signal PTRS ports; Based on the number of the downlink PTRS ports, the time-frequency domain density configuration of the downlink PTRS is determined; wherein the downlink PTRS is used to estimate and compensate for the phase noise PN generated by the local oscillator used by at least one RF chain, and the RF chain corresponds to the local oscillator one by one. The method according to claim 12, wherein The configuration information includes at least one of the following: the maximum number of downlink PTRS ports; the number of transmission configuration indication TCI states; and the number of code division multiplexing CDM groups corresponding to demodulation reference signal DMRS ports. The method according to claim 13, wherein The receiving configuration information includes at least one of the following: receiving downlink PTRS configuration information, wherein the downlink PTRS configuration information includes a maximum number of downlink PTRS ports and / or a number of CDM groups corresponding to the DMRS ports; A DCI is received, the DCI including the number of the TCI states. The method according to any one of claims 12 to 14, wherein: The number of the downlink PTRS ports is 1 or N, where N is an integer greater than or equal to 2. The method according to claim 15, wherein When the maximum number of downstream PTRS ports is configured as 1, the number of downstream PTRS ports is configured as 1. The method according to claim 15, wherein When the maximum number of downlink PTRS ports is configured to N and N is equal to 2, when the number of TCI states is equal to 2 and the number of CDM groups corresponding to the DMRS ports is equal to 2, the number of downlink PTRS ports is 2; or, when the number of TCI states is equal to 1 and / or the number of CDM groups corresponding to the DMRS ports is equal to 1, the number of downlink PTRS ports is 1. The method according to claim 17, wherein When the number of the downlink PTRS ports is 2, the two downlink PTRS ports are respectively associated with the lowest index DMRS ports in the two DMRS port groups indicating the TCI state. The method according to any one of claims 15 to 18, wherein: The determining of the time-frequency domain density configuration of the downlink PTRS based on the number of the downlink PTRS ports includes: when the number of the downlink PTRS ports is 1, determining the time-frequency domain density configuration to be the first time-frequency domain density configuration; or, when the number of the downlink PTRS ports is N, determining the time-frequency domain density configuration to be the second time-frequency domain density configuration. The method according to claim 19, wherein The second time-frequency domain density configuration includes: time domain density and frequency domain density; the value of the time domain density is one of the following: 6, 4, 2; the value of the frequency domain density is one of the following: 1, 2. The method according to claim 20, wherein The second time-frequency domain density configuration includes at least one of the following: the modulation and coding strategy MCS of the downlink PTRS scheduling is greater than or equal to the first MCS threshold and less than the second MCS threshold, and the value of the time domain density is 6; the MCS of the downlink PTRS scheduling is greater than or equal to the second MCS threshold and less than the third MCS threshold, and the value of the time domain density is 4; the MCS of the downlink PTRS scheduling is greater than or equal to the third MCS threshold and less than the fourth MCS threshold, and the value of the time domain density is 2. The method according to claim 20, wherein The second time-frequency domain density configuration includes at least one of the following: the bandwidth of the downlink PTRS scheduling is greater than or equal to the first bandwidth threshold and less than the second bandwidth threshold, and the value of the frequency domain density is 1; the bandwidth of the downlink PTRS scheduling is greater than or equal to the second bandwidth threshold and less than the third bandwidth threshold, and the value of the frequency domain density is 2. A communication device, comprising: The sending module is configured to send configuration information, wherein the configuration information is used to indicate the number of downlink phase tracking reference signal PTRS ports, and the downlink PTRS is used to estimate and compensate for the phase noise PN generated by the local oscillator used by at least one RF chain, and the RF chain corresponds to the local oscillator one by one. A communication device, comprising: A receiving module, configured to receive configuration information, where the configuration information is used to indicate the number of downlink phase tracking reference signal PTRS ports; The processing module is configured to determine the time-frequency domain density configuration of the downlink PTRS based on the number of the downlink PTRS ports; wherein the downlink PTRS is used to estimate and compensate for the phase noise PN generated by the local oscillator used by at least one RF chain, and the RF chain corresponds to the local oscillator one by one. A communication device, comprising: at least one processor; A memory coupled to the at least one processor, the memory storing executable instructions, wherein when the executable instructions are executed by the at least one processor, the communication device executes the method according to any one of claims 1 to 22. A storage medium, wherein The storage medium stores instructions, which, when executed in a communication device, enable the communication device to execute the method according to any one of claims 1 to 22.

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