Communication method for terminal having three transmitting antennas, device and storage medium

Abstract

The embodiments of the present disclosure provide a communication method for three transmitting antennas, a device, and a storage medium. The method can be executed by a terminal. The method comprises: transmitting sounding reference signals (SRS) on a number N of SRS resources, the function of the SRS resources being antenna switching, and N being an integer greater than or equal to 2. By means of the embodiments of the present disclosure, downlink channel estimation is implemented for a terminal having three transmitting antennas.

Description

Communication method, device and storage medium for terminal with three transmitting antennas Technical Field

[0001] The present disclosure relates to the field of wireless communications, and in particular to a communication method, device, and storage medium for a terminal with three transmitting antennas. Background Art

[0002] In a communication system, a terminal can send a sounding reference signal (SRS) to an access network device to determine uplink channel quality and / or downlink signal quality. The SRS resources used by the terminal to send SRS can be configured by the access network device. With the advancement of communication technology, a terminal may have three transmit antennas. In this case, the network device needs to configure the corresponding SRS resources for the terminal.

[0003] Summary of the Invention

[0004] How to estimate the downlink channel for a terminal with three transmitting antennas?

[0005] The embodiments of the present disclosure provide a terminal capability reporting method, device, and storage medium based on three transmitting antennas.

[0006] According to a first aspect of an embodiment of the present disclosure, a communication method for a terminal with three transmit antennas is provided. The method may be performed by the terminal. The method includes transmitting an SRS on N SRS resources, where the SRS resources function as antenna switching, and N is an integer greater than or equal to 2.

[0007] According to a second aspect of an embodiment of the present disclosure, a communication method for a terminal with three transmit antennas is provided. The method may be performed by a network device. The method includes receiving an SRS on N SRS resources, where the SRS resource functions as antenna switching, and N is an integer greater than or equal to 2.

[0008] According to a third aspect of an embodiment of the present disclosure, a terminal is provided. The terminal includes a transceiver module. The transceiver module is configured to send SRS on N SRS resources, where the function of the SRS resources is antenna switching, and N is an integer greater than or equal to 2.

[0009] According to a fourth aspect of an embodiment of the present disclosure, a network device is provided. The terminal includes a transceiver module. The transceiver module is configured to receive SRS on N SRS resources, where the function of the SRS resources is antenna switching, and N is an integer greater than or equal to 2.

[0010] According to a fifth aspect of an embodiment of the present disclosure, a terminal is provided. The terminal includes at least one processor and a memory storing instructions. When the instructions are executed by the terminal, the terminal implements the method described in the first aspect.

[0011] According to a sixth aspect of an embodiment of the present disclosure, a network device is provided. The terminal includes at least one processor and a memory storing instructions. When the instructions are executed by the network device, the network device implements the method described in the second aspect.

[0012] According to a seventh aspect of an embodiment of the present disclosure, a communication system is provided. The communication system includes a terminal and a network device. The terminal is configured to execute the method described in the first aspect; and the network device is configured to execute the method described in the second aspect.

[0013] According to an eighth aspect of an embodiment of the present disclosure, a storage medium is provided. The storage medium stores instructions that, when executed on a communication device, cause the communication device to execute the method described in the first or second aspect. The communication device may be at least one of a terminal and a network device.

[0014] According to a ninth aspect of the embodiments of the present disclosure, a computer program product is provided, which, when executed by a communication device, causes the communication device to execute the method according to the first or second aspect.

[0015] According to a tenth aspect of the embodiments of the present disclosure, a computer program is provided, which, when executed on a computer, causes the computer to execute the method according to the first or second aspect.

[0016] According to an eleventh aspect of the present disclosure, a chip or chip system is provided. The chip or chip system includes a processing circuit. The processing circuit is configured to execute the method described in the first aspect or the second aspect.

[0017] Through the embodiments of the present disclosure, downlink channel estimation of a terminal with three transmitting antennas is implemented.

[0018] 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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.

[0020] FIG1 is a schematic diagram of the architecture of a communication system provided according to an embodiment of the present disclosure.

[0021] FIG2 is a schematic diagram of mapping SRS resources on time-frequency domain resources according to an embodiment of the present disclosure.

[0022] FIG3 is a schematic diagram of a terminal radio frequency architecture provided according to an embodiment of the present disclosure.

[0023] FIG4A is an exemplary interaction diagram of a communication method provided according to an embodiment of the present disclosure.

[0024] 4B to 4G are schematic diagrams of SRS resources and antenna switching transmission intervals provided according to an embodiment of the present disclosure.

[0025] FIG5A is a flow chart of a method for executing communication on a terminal side according to an embodiment of the present disclosure.

[0026] FIG5B is a flow chart of a communication method executed on a network device side according to an embodiment of the present disclosure.

[0027] FIG6A is a schematic diagram of another implementation flow of a communication method executed on a terminal side according to an embodiment of the present disclosure.

[0028] FIG6B is a schematic diagram of another implementation flow of the communication method executed on the network device side according to an embodiment of the present disclosure.

[0029] FIG7A is a schematic structural diagram of a terminal provided according to an embodiment of the present disclosure.

[0030] FIG7B is a schematic structural diagram of a network device provided according to an embodiment of the present disclosure.

[0031] FIG8A is a schematic structural diagram of a communication device provided according to an embodiment of the present disclosure.

[0032] FIG8B is a schematic structural diagram of a chip provided according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0033] The embodiments of the present disclosure provide a terminal capability reporting method, device, and storage medium based on three transmitting antennas.

[0034] In a first aspect, an embodiment of the present disclosure provides a communication method for a terminal with three transmitting antennas, including: transmitting SRS on N SRS resources, where the function of SRS is antenna switching, and N is an integer greater than or equal to 2.

[0035] In the embodiment of the present disclosure, a terminal with three transmitting antennas transmits SRS on N SRS resources, so that a network device can obtain downlink CSI according to the SRS, thereby realizing estimation of the downlink channel.

[0036] With reference to the first aspect, in some possible implementations, the terminal further includes Y receiving antennas, where Y is an integer greater than 3.

[0037] In combination with the first aspect, in some possible implementations, the antenna switching configuration of the terminal includes one of the following: 3 transmitting antennas and 4 receiving antennas; 3 transmitting antennas and 6 receiving antennas; 3 transmitting antennas and 8 receiving antennas.

[0038] With reference to the first aspect, in some possible implementations, each of the N SRS resources includes at least one of the following: a single-port SRS resource; or a 2-port SRS resource.

[0039] With reference to the first aspect, in some possible implementations, when the terminal has four receiving antennas, the N SRS resources include four single-port SRS resources or two two-port SRS resources.

[0040] With reference to the first aspect, in some possible implementations, when the terminal has 6 receiving antennas, the N SRS resources include 6 single-port SRS resources or 3 2-port SRS resources.

[0041] With reference to the first aspect, in some possible implementations, when the terminal has 8 receiving antennas, the N SRS resources include 8 single-port SRS resources or 4 2-port SRS resources.

[0042] With reference to the first aspect, in some possible implementations, N SRS resources belong to one SRS resource set.

[0043] In combination with the first aspect, in some possible implementations, an antenna switching transmission interval is added between the last symbol of the i-th SRS resource and the first symbol of the i+1-th SRS resource among N SRS resources, the i-th SRS resource is adjacent to the i+1-th SRS resource, and i is a positive integer less than or equal to N-1.

[0044] In combination with the first aspect, in some possible implementations, when Y receiving antennas undergo X switching, the n switchings before the j-th switching in the X switchings are j The last symbol of the SRS resource is the same as the nth symbol after the jth switching. j+1 An antenna switching transmission interval is added between the first symbols of the SRS resources, where X is a positive integer, n j and n j+1 is a positive integer less than or equal to 3, and j is a positive integer less than or equal to X-1.

[0045] In the embodiment of the present disclosure, by adding an antenna switching transmission interval when the receiving antenna is switched, the number of added antenna switching transmission intervals can be significantly reduced, thereby reducing the occupation of uplink time domain resources.

[0046] In combination with the first aspect, in some possible implementations, a time domain offset of the antenna switching transmission interval relative to a first SRS resource among the N SRS resources is preconfigured or configured by a network device.

[0047] In combination with the first aspect, in some possible implementations, when the time domain offset is configured by a network device, the method also includes: sending first information, where the first information is used to indicate to the network device the time domain offset of the antenna switching transmission interval supported by the terminal relative to the first SRS resource among N SRS resources.

[0048] In combination with the first aspect, in some possible implementations, the method further includes: sending second information, where the second information is used to indicate a time domain offset of the antenna switching transmission interval determined by the terminal relative to the first SRS resource among the N SRS resources.

[0049] In combination with the first aspect, in some possible implementations, the SRS resource set type is one of the following: a periodic SRS resource set; a semi-persistent SRS resource set; or an aperiodic SRS resource set.

[0050] In combination with the first aspect, in some possible implementations, the aperiodic SRS resource set supports extending the number of SRS resource sets.

[0051] In combination with the first aspect, in some possible implementations, the number of SRS resource sets is 2.

[0052] With reference to the first aspect, in some possible implementations, the N SRS resources are non-periodic SRS resources, and the N SRS resources belong to multiple SRS resource sets.

[0053] In combination with the first aspect, in some possible implementations, among N SRS resources, SRS resources configured to be sent at the same time domain position belong to the same SRS resource set, and SRS resources configured to be sent at different time domain positions belong to different SRS resource sets.

[0054] In combination with the first aspect, in some possible implementations, multiple SRS resource sets are configured by a network device to be sent in different time slots.

[0055] In combination with the first aspect, in some possible implementations, multiple SRS resource sets are configured by a network device to be sent in the same time slot, an antenna switching transmission interval is added between the last symbol of the last SRS resource in the kth SRS resource set among the multiple SRS resource sets and the first symbol of the first SRS resource in the k+1th SRS resource set, the kth SRS resource set is adjacent to the k+1th SRS resource set, and k is a positive integer.

[0056] In a second aspect, an embodiment of the present disclosure provides a communication method for a terminal with three transmitting antennas, including: receiving SRS on N SRS resources, where the function of SRS is antenna switching, and N is an integer greater than or equal to 2.

[0057] In combination with the second aspect, in some possible implementations, the terminal further includes Y receiving antennas, where Y is an integer greater than 3.

[0058] In conjunction with the second aspect, in some possible implementations, the antenna switching configuration of the terminal includes one of the following: 3 transmitting antennas and 4 receiving antennas; 3 transmitting antennas and 6 receiving antennas; 3 transmitting antennas and 8 receiving antennas.

[0059] In conjunction with the second aspect, in some possible implementations, each of the N SRS resources includes at least one of the following: a single-port SRS resource; or a 2-port SRS resource.

[0060] In conjunction with the second aspect, in some possible implementations, when the terminal has four receiving antennas, the N SRS resources include four single-port SRS resources or two two-port SRS resources.

[0061] In conjunction with the second aspect, in some possible implementations, when the terminal has 6 receiving antennas, the N SRS resources include 6 single-port SRS resources or 3 2-port SRS resources.

[0062] In conjunction with the second aspect, in some possible implementations, when the terminal has 8 receiving antennas, the N SRS resources include 8 single-port SRS resources or 4 2-port SRS resources.

[0063] In conjunction with the second aspect, in some possible implementations, N SRS resources belong to one SRS resource set.

[0064] In combination with the second aspect, in some possible implementations, an antenna switching transmission interval is added between the last symbol of the i-th SRS resource and the first symbol of the i+1-th SRS resource among N SRS resources, the i-th SRS resource is adjacent to the i+1-th SRS resource, and i is a positive integer less than or equal to N-1.

[0065] In conjunction with the second aspect, in some possible implementations, when Y receiving antennas undergo X switching, the n switchings before the j-th switching in the X switchings are j The last symbol of the SRS resource is the same as the nth symbol after the jth switching. j+1 An antenna switching transmission interval is added between the first symbols of the SRS resources, where X is a positive integer, n j and n j+1 is a positive integer less than or equal to 3, and j is a positive integer less than or equal to X-1.

[0066] In conjunction with the second aspect, in some possible implementations, a time domain offset of the antenna switching transmission interval relative to a first SRS resource among the N SRS resources is preconfigured or configured by a network device.

[0067] In combination with the second aspect, in some possible implementations, when the time domain offset is configured by a network device, the method also includes: receiving first information, the first information being used to indicate the time domain offset of the antenna switching transmission interval supported by the terminal relative to the first SRS resource among N SRS resources.

[0068] In combination with the second aspect, in some possible implementations, the method further includes: receiving second information, where the second information is used to indicate a time domain offset of an antenna switching transmission interval determined by the terminal relative to a first SRS resource among the N SRS resources.

[0069] In conjunction with the second aspect, in some possible implementations, the SRS resource set type is one of the following: a periodic SRS resource set; a semi-persistent SRS resource set; or an aperiodic SRS resource set.

[0070] In conjunction with the second aspect, in some possible implementations, the aperiodic SRS resource set supports extending the number of SRS resource sets.

[0071] In conjunction with the second aspect, in some possible implementations, the number of SRS resource sets is 2.

[0072] In conjunction with the second aspect, in some possible implementations, the N SRS resources are non-periodic SRS resources, and the N SRS resources belong to multiple SRS resource sets.

[0073] In combination with the second aspect, in some possible implementations, among N SRS resources, SRS resources sent at the same time domain position are configured in the same SRS resource set, and SRS resources sent at different time domain positions are configured in different SRS resource sets.

[0074] In conjunction with the second aspect, in some possible implementations, multiple SRS resource sets are configured by a network device to be sent in different time slots.

[0075] In combination with the second aspect, in some possible implementations, multiple SRS resource sets are configured by a network device to be sent in the same time slot, and an antenna switching transmission interval is added between the last symbol of the last SRS resource in the kth SRS resource set among the multiple SRS resource sets and the first symbol of the first SRS resource in the k+1th SRS resource set. The kth SRS resource set is adjacent to the k+1th SRS resource set, and k is a positive integer.

[0076] In a third aspect, an embodiment of the present disclosure provides a terminal, including: a transceiver module configured to send SRS on N SRS resources, the function of SRS is antenna switching, and N is an integer greater than or equal to 2.

[0077] In a fourth aspect, an embodiment of the present disclosure provides a network device, including: a transceiver module configured to receive SRS on N SRS resources, the function of SRS being antenna switching, and N being an integer greater than or equal to 2.

[0078] In a fifth aspect, embodiments of the present disclosure provide a terminal. The terminal includes at least one processor and a memory storing instructions. When the instructions are executed by the terminal, the terminal implements the method as described in any one of the first aspect and possible implementations thereof.

[0079] In a sixth aspect, an embodiment of the present disclosure provides a network device. The terminal includes at least one processor and a memory storing instructions. The instructions, when executed by the network device, enable the network device to implement the method as described in any one of the second aspect and possible implementations thereof.

[0080] In a seventh aspect, embodiments of the present disclosure provide a communication system. The communication system includes a terminal and a network device. The terminal is configured to perform the method described in any one of the first aspect and possible implementations thereof. The network device is configured to perform the method described in any one of the second aspect and possible implementations thereof.

[0081] In an eighth aspect, an embodiment of the present disclosure provides a storage medium storing instructions that, when executed on a communication device, cause the communication device to execute the method as described in any one of the first aspect, the second aspect, and possible implementations thereof.

[0082] In a ninth aspect, an embodiment of the present disclosure provides a computer program product. When the program product is executed by a communication device, the communication device executes the method as described in any one of the first aspect, the second aspect, and possible implementations thereof.

[0083] In a tenth aspect, an embodiment of the present disclosure provides a computer program. When the computer program is executed on a computer, the computer executes the method as described in any one of the first aspect, the second aspect, and possible implementations thereof.

[0084] In an eleventh aspect, embodiments of the present disclosure provide a chip or chip system. The chip or chip system includes a processing circuit. The processing circuit is configured to execute the method as described in any one of the first aspect, the second aspect, and possible implementations thereof.

[0085] It is understandable that the above-mentioned terminals, network devices, communication systems, storage media, computer program products, computer programs, chips, and chip systems are all used to perform the methods provided by the embodiments of the present disclosure. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects of the corresponding methods and will not be repeated here.

[0086] The present disclosure provides a communication method, device, and storage medium for a terminal with three transmit antennas. In some embodiments, the terms "communication method for a terminal with three transmit antennas," "communication method," "information processing method," and "information transmission method" are interchangeable; the terms "network element," "network device," "network function," and "network entity" are interchangeable; and the terms "communication system" and "information processing system" are interchangeable.

[0087] The embodiments of the present disclosure are not exhaustive and are merely 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 steps of different embodiments can be arbitrarily combined, and a certain embodiment can be arbitrarily combined with the optional implementation methods of other embodiments.

[0088] In the embodiments 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 by each other. The technical features in different embodiments can be combined to form a new embodiment based on their inherent logical relationships.

[0089] 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.

[0090] In the embodiments of the present disclosure, unless otherwise specified, elements expressed in the singular, such as "a", "an", "the", "above", "said", "the", "the", etc., may mean "one and only one", or "one or more", "at least one", etc. For example, when articles such as "a", "an", "the" in English are used in translation, the noun following the article may be understood as a singular expression or a plural expression.

[0091] In the embodiments of the present disclosure, “plurality” refers to two or more than two.

[0092] In some embodiments, the terms "at least one", "one or more", etc. can be used interchangeably.

[0093] In some embodiments, descriptions such as "at least one of A and B," "A and / or B," "A in one case, B in another case," or "in response to one case A, in response to another case B" may include the following technical solutions depending on 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); and in some embodiments, A and B (both A and B are executed). The above is also applicable when there are more branches such as A, B, and C.

[0094] In some embodiments, "A or B" and other descriptions may include the following technical solutions depending on 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). The above is also applicable when there are more branches such as A, B, C, etc.

[0095] 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 any restriction on the position, order, priority, quantity or content of the description objects. For the statement of the description object, please refer to the description in the context of the claims or embodiments, and no unnecessary restriction should be constituted 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". "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 "first device" as an example, the number of "devices" can be one or more. In addition, the objects modified by different prefixes can be the same or different. For example, if the description object is "device", then the "first device" and the "second device" can be the same device or different devices, and their types can be the same or different; for example, if the description object is "information", then the "second information" and the "first information" can be the same information or different information, and their contents can be the same or different.

[0096] 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.

[0097] In some embodiments, terms such as "in response to...", "in response to determining...", "in the case of...", "at the time of...", "when...", "if...", "if...", etc. can be used interchangeably.

[0098] 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 less 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", "not more than", "lower than", "lower than or equal to", "not higher than", and "below" can be replaced with each other.

[0099] 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.

[0100] In some embodiments, "network" can be interpreted as devices included in the network (eg, access network equipment, core network equipment, etc.).

[0101] In some embodiments, the terms "access network device (AN device)", "radio access network device (RAN device)", "base station (BS)", "radio base station" "fixed station", "node", "access point", "transmission point (TP)", "reception point (RP)", "transmission / reception point (TRP)" "panel", "antenna panel", "antenna array", "cell", "macro cell", "small cell", "femto cell", "pico cell", "sector", "cell group", "serving cell", "carrier", "component carrier", "bandwidth part (BWP)" and the like may be used interchangeably.

[0102] 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, etc. can be used interchangeably.

[0103] 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 communication between the access network device, the core network device, or the network device and the terminal is replaced by communication between multiple terminals (for example, device-to-device (D2D), vehicle-to-everything (V2X), etc.). In this case, it is also possible to set the 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.

[0104] 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 have a structure that has all or part of the functions of the terminal.

[0105] In some embodiments, obtaining data, information, etc. may comply with the laws and regulations of the country where the data is obtained.

[0106] In some embodiments, data, information, etc. may be obtained with the user's consent.

[0107] In addition, each element, each row, or each column in the table of the embodiment of the present disclosure can be implemented as an independent embodiment, and the combination of any elements, any rows, and any columns can also be implemented as an independent embodiment.

[0108] Figure 1 is a schematic diagram of the architecture of a communication system according to an embodiment of the present disclosure. As shown in Figure 1, the communication system 100 includes a terminal 101 and a network device 102. In one example, the network device 102 may be an access network device.

[0109] 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.

[0110] In some embodiments, the network device 102 can be, for example, a node or device that accesses the terminal to a wireless network. The 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.

[0111] In some embodiments, the technical solution of the present disclosure can be applied to the Open RAN architecture. In this case, the interfaces within the network devices involved in the embodiments of the present disclosure can be transformed into internal interfaces of the Open RAN, and the processes and information interactions between these internal interfaces can be implemented through software or programs.

[0112] In some embodiments, the network device 102 can be composed of a centralized unit (CU) and a distributed unit (DU), where the CU can also be called a 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 functions of the remaining part or all of the protocol layers distributed in the DU, which is centrally controlled by the CU, but is not limited to this.

[0113] In some embodiments, the network device 102 may be one device, or multiple devices or a device group. The network device 102 may be virtual or physical.

[0114] 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. Ordinary technicians in this field 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.

[0115] The following embodiments of the present disclosure may be applied to the communication system 100 shown in Figure 1, or a portion thereof, but are not limited thereto. The entities shown in Figure 1 are illustrative only. The communication system may include all or part of the entities shown in Figure 1, or may include other entities outside of Figure 1. The number and form of the entities may be arbitrary. The connection relationship between the entities is illustrative only. The entities may be connected or disconnected, and the connection may be in any manner, including direct or indirect, wired or wireless.

[0116] 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 access technology (RAT), 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), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, ultra-wideband (UWB), and the like. band, 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, and next-generation systems based on them. In addition, multiple systems can also be combined (for example, a combination of LTE or LTE-A and 5G) for application.

[0117] In a communication system, a terminal can estimate uplink and / or downlink channels by sending an SRS to a network device. The network device configures SRS resources for the terminal to use for SRS transmission. When configuring SRS resources, the network device needs to understand the terminal's SRS-related capabilities and configure SRS resources based on the terminal's capabilities.

[0118] In some embodiments, a terminal may have one or more antenna ports, and the terminal may transmit SRS through one or more antenna ports. In this case, the SRS resources configured by the network device for the terminal may correspond to the number of antenna ports of the terminal. More specifically, the SRS resource may have one or more SRS ports, and the number of SRS ports may correspond to the number of antenna ports of the terminal. In some embodiments, the number of SRS ports supported by the SRS resource may be 1, 2, 4, 8, etc. In some embodiments, the number of SRS ports may be configured using the high-level parameter nrofSRS-Ports in the configuration information.

[0119] In the embodiments of the present disclosure, terms such as antenna port, SRS port, physical antenna, and antenna can be used interchangeably.

[0120] The SRS resource may occupy one or more symbols (e.g., orthogonal frequency division multiplexing (OFDM) symbols) in the time domain. The symbols occupied by the SRS resource may be continuous in the time domain. In some embodiments, the number of available time domain resources, i.e., the number of symbols that the SRS resource may occupy, may be 1, 2, 4, 8, 10, 12, 14, etc. In some embodiments, the number of symbols occupied by the SRS resource may be configured by a higher-layer parameter nrofSymbol in the configuration information. In some embodiments, the position of the starting symbol of the SRS resource may be 0, 1, 2, 3, 4, 5, etc. In some embodiments, the position of the starting symbol of the SRS resource may be configured by a higher-layer parameter startPosition in the configuration information.

[0121] Figure 2 is a schematic diagram of the mapping of SRS resources on time-frequency domain resources provided by an embodiment of the present disclosure. As shown in Figure 2, three SRS resources are mapped on the time-frequency domain resources, namely the first SRS resource, the second SRS resource, and the third SRS resource. The first SRS resource occupies 1 symbol in the time domain, and this symbol is the third symbol from the start point after the last symbol in the time slot where the first SRS resource is located. The high-level parameters nrofSymbol and startPosition related to the first SRS resource can be 1 and 3, respectively. The second SRS resource occupies 4 symbols in the time domain, and the last symbol of the second SRS resource is the second symbol from the start point after the last symbol in the time slot where the second SRS resource is located. The high-level parameters nrofSymbol and startPosition related to the second SRS resource can be 4 and 2, respectively. The third SRS resource occupies 2 symbols in the time domain, and the last symbol of the third SRS resource is the 0th symbol from the start point after the last symbol in the time slot where the third SRS resource is located. The third SRS resource-related high-level parameters nrofSymbol and startPosition may be 2 and 0, respectively.

[0122] The SRS resources can be arranged in a comb-like manner in the frequency domain. That is to say, the subcarriers occupied by an SRS resource are arranged at equal intervals. Obviously, the subcarriers occupied by an SRS resource are non-continuous. In some embodiments, the arrangement period of the subcarriers occupied by the SRS resources in the frequency domain can be 2, 4, etc. In some embodiments, the arrangement period of the subcarriers occupied by the SRS resources in the frequency domain can be configured by the high-level parameter transmissionComb in the configuration information. In some embodiments, the offset of the subcarriers occupied by the SRS resources in the frequency domain can be 0, 1, 2, 3, etc. In some embodiments, the offset of the subcarriers occupied by the SRS resources in the frequency domain can be configured by the high-level parameter combOffset in the configuration information.

[0123] Continuing with Figure 2, the first SRS resource is arranged in a comb-like pattern in the frequency domain, with an arrangement period of 2, and the offset of the first occupied subcarrier relative to the first subcarrier (lower edge) of the time-frequency resource is 0. The high-level parameters transmissionComb and combOffset related to the first SRS resource can be 2 and 0, respectively. Similarly, the high-level parameters transmissionComb and combOffset related to the second SRS resource can be 2 and 1, respectively, and the high-level parameters transmissionComb and combOffset related to the third SRS resource can be 4 and 0, respectively.

[0124] In some embodiments, the mapping of an 8-port SRS resource (i.e., an SRS resource supporting 8 SRS ports) to time-frequency resources can be performed using either time division multiplexing (TDM) or non-TDM. In some embodiments, whether the 8-port SRS resource uses the TDM method can be configured using the higher-level parameter transmissionComb in the configuration information. In some embodiments, for the non-TDM method, the mapping of the 8-port SRS resource to time-frequency resources can be achieved by arranging different combinations of period, subcarrier offset, and cyclic shift. In one example, the higher-level parameter transmissionComb associated with the 8-port SRS resource can be 2, and different cyclic shifts can be used. In another example, the higher-level parameter transmissionComb associated with the 8-port SRS resource can be 4 or 8, and different subcarrier offsets and cyclic shifts can be used. In some embodiments, for the TDM method, the 8-port SRS resource can occupy multiple symbols. In one example, the 8-port SRS resource can occupy 2 symbols. In this case, the 8 SRS ports corresponding to the 8-port SRS resource can be divided into two SRS port subsets. Each SRS port subset can include 4 SRS ports. For example, the first SRS port subset may include ports 0, 1, 4, 5, and the second SRS port subset may include ports 2, 3, 6, 7.

[0125] With the development of wireless communication technology, a terminal may have three transmit antennas, where the three transmit antennas are physical antennas. In this case, how the terminal performs downlink channel estimation is a problem that needs to be solved.

[0126] The embodiments of the present disclosure provide a communication method, device, and storage medium for a terminal with three transmitting antennas, so as to implement downlink channel estimation for the terminal with three transmitting antennas.

[0127] In some embodiments, for a terminal with three transmit antennas (which may be denoted as Tx) (i.e., a terminal with three transmit antennas), the number of receive antennas (which may be denoted as Rx) is Y, and Y may be configured as an integer greater than 3. In one example, Y = 4, 6, or 8.

[0128] In some embodiments, the combination of transmit antennas (Tx) and receive antennas (Rx) of the terminal may include one of 3 transmit antennas and 4 receive antennas (3Tx / 4Rx), 3 transmit antennas and 6 receive antennas (3Tx / 6Rx), and 3 transmit antennas and 8 receive antennas (3Tx / 8Rx).

[0129] In one example, as shown in Figure 3, Figure 3 is a schematic diagram of a terminal radio frequency architecture provided according to an embodiment of the present disclosure. (a) shows a 3Tx / 4Rx terminal radio frequency architecture, (b) shows a 3Tx / 6Rx terminal radio frequency architecture, (c) shows a 3Tx8 / Rx terminal radio frequency architecture, and (d) shows another 3Tx / 8Rx terminal radio frequency architecture.

[0130] In some embodiments, a terminal RF architecture of "xTx / yRx" corresponds to an antenna switching configuration denoted as "xTyR." In one example, a terminal RF architecture of 3Tx / 4Rx corresponds to an antenna switching configuration denoted as "3T4R," a terminal RF architecture of 3Tx / 6Rx corresponds to an antenna switching configuration denoted as "3T6R," and a terminal RF architecture of 3Tx / 8Rx corresponds to an antenna switching configuration denoted as "3T8R."

[0131] In some embodiments, the terms "antenna switching configuration," "antenna switching pattern," and the like may be used interchangeably.

[0132] In some embodiments, terms such as "x transmit antennas and y receive antennas," "xTx / yRx," and "xTyR" may be used interchangeably. In one example, "3 transmit antennas and 4 receive antennas" may be replaced by "3Tx / 4Rx" or "3T4R." In another example, "3 transmit antennas and 6 receive antennas" may be replaced by "3Tx / 6Rx" or "3T6R." In another example, "3 transmit antennas and 8 receive antennas" may be replaced by "3Tx / 8Rx" or "3T8R."

[0133] As shown in FIG3 , when the terminal sends SRS, it needs to traverse all receiving antennas through antenna switching (AS, also called antenna rotation) to achieve downlink channel state estimation CSI.

[0134] The communication method for a terminal with three transmitting antennas (hereinafter referred to as the communication method) provided in the present disclosure is described below in combination with different terminal radio frequency architectures.

[0135] FIG4A is an exemplary interaction diagram of a communication method according to an embodiment of the present disclosure. As shown in FIG4A , an embodiment of the present disclosure relates to a communication method. The communication method includes steps S401 to S403.

[0136] For the 3T4R terminal radio frequency architecture, the number of receiving antennas of the terminal is Y=4.

[0137] In step S401, the terminal sends third information.

[0138] In some embodiments, the network device receives third information.

[0139] In some embodiments, the network device may receive third information.

[0140] In some embodiments, the third information may be used to indicate the capability of the terminal.

[0141] In some embodiments, the third information may be used to indicate functions supported by the terminal.

[0142] In some embodiments, the name of the third information is not limited, and it can be, for example, capability information, UE capability, UE capability information, UE capability indication, function information, etc. The embodiments of the present disclosure do not make specific limitations on this.

[0143] In some embodiments, the third information may be carried in a ueCapabilityInformation information element (IE). In one example, the third information may be a supportedSRS-TxPortSwitch information element.

[0144] In some embodiments, the third information includes the fourth information.

[0145] In some embodiments, the fourth information may be used to indicate that the function is antenna switching.

[0146] In some embodiments, the fourth information may be used to indicate that the function of the SRS resource is antenna switching.

[0147] In some embodiments, the fourth information may be used to indicate that the purpose of the SRS resource set is antenna switching.

[0148] In some embodiments, the fourth information may be a usage information element. In one example, the value of the usage information element may be equal to "antennaSwitching," indicating that the function is antenna switching. For example, the value range of the usage information element may be {beamManagement, codebook, nonCodebook, antennaSwitching}. Therefore, for terminal 101, the value of the usage information element in the third information may be equal to "antennaSwitching." Of course, the fourth information may also be other information elements or signaling, which is not specifically limited in the present embodiment.

[0149] In some embodiments, the third information may further include the first information.

[0150] In some embodiments, the first information is used to indicate a time domain offset of an antenna switching transmission interval (AS gap) supported by the terminal relative to the first SRS resource among the N SRS resources.

[0151] In some embodiments, the first information is used to indicate time domain resources occupied by an antenna switching transmission interval supported by the terminal.

[0152] In some embodiments, the antenna switching transmission interval may occupy one or more symbols (eg, orthogonal frequency division multiplexing (OFDM) symbols).

[0153] In one example, the antenna switching transmission interval is the switching time required by the terminal when the physical antenna or transmission channel is switched, and its value is related to the subcarrier spacing. Specific values ​​can be seen in Table 1 below.

[0154] Table 1

[0155] In some embodiments, the third information may further include the second information.

[0156] In some embodiments, the second information is used to indicate the time domain resources occupied by the antenna switching transmission interval determined by the terminal.

[0157] In some embodiments, the second information may be used to indicate the time domain offset of the antenna switching transmission interval determined by the terminal relative to the first SRS resource among the N SRS resources. Here, based on terminal implementation, the terminal may independently determine how to send the antenna switching transmission interval and indicate it to the network device through the first information, so that the network device and the terminal reach an agreement on the transmission of the antenna switching interval.

[0158] In some embodiments, the time domain offset of the antenna switching transmission interval relative to the first SRS resource among N SRS resources can be understood as the offset of the first symbol of the antenna switching transmission interval relative to the first symbol of the first SRS resource among N SRS resources, or can be understood as the number of symbols between the starting symbol of the antenna switching transmission interval and the starting symbol of the N SRS resources. In one example, the antenna switching transmission interval can be added after the third SRS resource among four SRS resources. In this case, the time domain offset can be the offset between the last symbol of the third SRS resource and the first symbol of the first SRS resource plus 1.

[0159] In some embodiments, the time domain offset of the antenna switching transmission interval relative to the first SRS resource among the N SRS resources may be preconfigured. In this case, the third information does not include the first information and the second information.

[0160] In some embodiments, the time domain offset of the antenna switching transmission interval relative to the first SRS resource among the N SRS resources may be configured by the network device. In this case, the third information does not include the first information and the second information.

[0161] In some embodiments, the network device may not receive the third information.

[0162] In some embodiments, the network device may not expect to receive the third information.

[0163] In step S402, the network device sends fourth information.

[0164] In some embodiments, the terminal receives fourth information.

[0165] In some embodiments, the fourth information is used to indicate an SRS resource set configured for the terminal. The number of the SRS resource set is one or more.

[0166] In some embodiments, the fourth information includes the fifth information.

[0167] In some embodiments, the fifth information may be used to configure the SRS resource type.

[0168] In some embodiments, the fifth information may be used to configure the resource type of the SRS resource set.

[0169] In some embodiments, the resource type of an SRS resource set may be used to indicate the periodicity of the SRS resources in the SRS resource set.

[0170] In some embodiments, the resource types may include: periodic, semi-persistent, and aperiodic.

[0171] In some embodiments, the fifth information may be a resourceType information element. In one example, the value range of the resourceType information element may be {periodic, semi-persistent, aperiodic}. Therefore, for terminal 101, the value of the resourceType information element in the fourth information may be equal to any one of periodic, semi-persistent, and aperiodic. Of course, the fifth information may also be other information elements or signaling, which is not specifically limited in the present embodiment.

[0172] In some embodiments, when the resource type is aperiodic (the value of the resourceType information element is aperiodic), the SRS resource set supports an extended number of SRS resource sets. In one example, the extended number of SRS resource sets may be 2. In one example, srs-ExtensionAperiodicSRS indicates that the SRS resource set supports an extended number of SRS resource sets.

[0173] In some embodiments, for a 3T4R terminal radio frequency architecture, the network device configures one SRS resource set for the terminal, where the SRS resource set includes N SRS resources, where N is an integer greater than or equal to 2. In one example, the SRS resource can be one of a single-port SRS resource, a two-port SRS resource, and the like.

[0174] In some embodiments, the network device configures one SRS resource set for the terminal, and the SRS resource set includes four single-port SRS resources. In this case, N=4.

[0175] In some embodiments, the network device configures one SRS resource set for the terminal, and the SRS resource set includes two 2-port SRS resources. In this case, N=2.

[0176] In some embodiments, the network device configures multiple SRS resource sets for the terminal, and the total number of SRS resources included in the multiple SRS resource sets is N. In one example, the SRS resource can be one of a single-port SRS resource, a 2-port SRS resource, and the like.

[0177] In some embodiments, the SRS resources included in the multiple SRS resource sets are non-periodic SRS resources.

[0178] In some embodiments, a network device configures two SRS resource sets for a terminal. In one example, one of the two SRS resource sets includes three single-port SRS resources, and the other SRS resource set includes one single-port SRS resource. In another example, one of the two SRS resource sets includes two single-port SRS resources, and the other SRS resource set includes two single-port SRS resources. In another example, one of the two SRS resource sets includes one 2-port SRS resource, and the other SRS resource set includes one 2-port SRS resource.

[0179] In some embodiments, among N SRS resources, SRS resources configured to be transmitted at the same time domain location belong to the same SRS resource set, and SRS resources configured to be transmitted at different time domain locations belong to different SRS resource sets. In one example, one of two SRS resource sets includes three single-port SRS resources transmitted at the same time domain location, and the other SRS resource set includes one single-port SRS resource transmitted at the same time domain location.

[0180] In some embodiments, the SRS resources sent at the same time domain position may be understood as configured SRS resources being the same time domain resources, or SRS resources allocated on the same time domain resources.

[0181] In some embodiments, the aforementioned SRS resources sent at different time domain locations may be understood as configured SRS resources being different time domain resources, or SRS resources allocated on different time domain resources.

[0182] In some embodiments, multiple SRS resource sets are configured by the network device to be sent in different time slots.

[0183] In some embodiments, multiple SRS resource sets are configured by the network device to be sent in the same time slot.

[0184] In some embodiments, the fourth information includes sixth information.

[0185] In some embodiments, when the terminal sends the first information, the fourth information includes the sixth information.

[0186] In some embodiments, the sixth information is used to indicate a time domain offset of an antenna switching transmission interval (AS gap) configured by the network device for the terminal relative to the first SRS resource among the N SRS resources.

[0187] In step S403, the terminal sends an SRS.

[0188] In some embodiments, the network device receives the SRS.

[0189] In some embodiments, the SRS is used for downlink channel estimation. In one example, the SRS is used for obtaining downlink channel state information (CSI).

[0190] In some embodiments, the terminal transmits SRS on N SRS resources.

[0191] In some embodiments, N SRS resources belong to 1 SRS resource set.

[0192] In some embodiments, the terminal transmits SRS on N SRS resources in one SRS resource set. In one example, N=2 or 4.

[0193] In some embodiments, N=4, the terminal transmits SRS corresponding to four antenna ports on four single-port SRS resources in one SRS resource set. Referring to FIG4B , the four single-port SRS resources are resource 0, resource 1, resource 2, and resource 3, respectively.

[0194] In some embodiments, when a terminal transmits an SRS on four single-port SRS resources in an SRS resource set, one antenna switching transmission interval may be added between adjacent SRS resources. In one example, an SRS resource set includes four single-port SRS resources, and the terminal adds three antenna switching transmission intervals between the four single-port SRS resources.

[0195] In some embodiments, the above-mentioned addition of one antenna switching transmission interval between adjacent SRS resources can be understood as adding one antenna switching transmission interval between the last symbol of the i-th single-port SRS resource and the first symbol of the i+1-th single-port SRS resource in an SRS resource set, where i is an integer less than or equal to N-1.

[0196] In some embodiments, three antenna switching transmission intervals are added between four single-port SRS resources, as shown in FIG4B (a). This can be understood as follows: in the SRS resource set, one antenna switching transmission interval (gap0) is added between the last symbol of the first single-port SRS resource (resource 0) and the first symbol of the second single-port SRS resource (resource 1); one antenna switching transmission interval (gap1) is added between the last symbol of the second single-port SRS resource (resource 1) in the SRS resource set and the first symbol of the third single-port SRS resource (resource 2); and one antenna switching transmission interval (gap2) is added between the last symbol of the third single-port SRS resource (resource 2) in the SRS resource set and the first symbol of the fourth single-port SRS resource (resource 3). The terminal first transmits an SRS through resource 0 in the SRS resource set, at which time antenna switching occurs, and the terminal adds gap0 after the last symbol of resource 0. The terminal then transmits an SRS on resource 1, at which time antenna switching occurs. The terminal adds gap 1 after the last symbol of resource 1. It then transmits an SRS on resource 2. Antenna switching occurs. It adds gap 2 after the last symbol of resource 2. It then transmits an SRS on resource 3.

[0197] In one example, in conjunction with the terminal RF architecture shown in FIG3(a), still referring to FIG4B(a), the network configures an SRS resource set for the terminal. The SRS resource set includes four single-port SRS resources, such as resource 0, resource 1, resource 2, and resource 3. The terminal can send an SRS on resource 0 via antenna 1. At this time, antenna 1 switches to antenna 2, and the terminal adds gap 0 after the last symbol of resource 0. The terminal then sends an SRS on resource 1 via antenna 2. The terminal adds gap 1 after the last symbol of resource 1. The terminal then sends an SRS on resource 2 via antenna 3. The terminal adds gap 2 after the last symbol of resource 2. The terminal then sends an SRS on resource 3.

[0198] In some embodiments, when a terminal transmits SRS on four single-port SRS resources within one SRS resource set, an antenna switching transmission interval may be added when four receive antennas are switched. In one example, if four receive antennas are switched once, one antenna switching transmission interval may be added to the four single-port SRS resources.

[0199] In some embodiments, when four receiving antennas are switched X times, the number of antennas before the jth switch is n. j The last symbol of the single-port SRS resource is the same as the nth symbol after the jth switch. j+1 An antenna switching transmission interval is added between the first symbols of the single-port SRS resources, where X is a positive integer, n j and n j+1 is a positive integer less than or equal to 3, and j is a positive integer less than or equal to X-1. In one example, for the 3T4R terminal RF architecture, combined with (a) in Figure 3, X=1, j=0, {n0,n1}={3,1}, {2,2} or {1,3}. Of course, based on the terminal implementation, X, j, n j and n j+1 The value of can be other values. The above is only an example and is not specifically limited in the embodiments of the present disclosure.

[0200] In some embodiments, as shown in FIG4B(b), when {n0, n1} = {3, 1}, an antenna switching transmission gap (gap0) may be added between the last symbol of the first three single-port SRS resources (resources 0 to 2) in an SRS resource set (i.e., the last symbol of the third single-port SRS resource (resource 2)) and the first symbol of the last single-port SRS resource (resource 3) in the SRS resource set (i.e., the first symbol of the fourth single-port SRS resource (resource 3)). The terminal then first transmits the SRS via resources 0 to 2 in the SRS resource set. At this point, antenna switching occurs, and the terminal adds gap0 after the last symbol of resource 2. The terminal then transmits the SRS on resource 3.

[0201] In one example, in conjunction with the terminal RF architecture shown in Figure 3(a), still referring to Figure 4B(b), the network configures an SRS resource set for the terminal. This SRS resource set includes four single-port SRS resources, such as resource 0, resource 1, resource 2, and resource 3. The terminal can send the SRS on resource 0 via antenna 1, send the SRS on resource 1 via antenna 2, and send the SRS on resource 2 via antenna 3. In this case, when switching from antenna 1 to antenna 2, the terminal adds gap 0 after the last symbol of resource 2. The terminal then sends the SRS on resource 3 via antenna 4.

[0202] In some embodiments, as shown in FIG4B(c), when {n0, n1} = {2, 2}, an antenna switching transmission gap (gap0) can be added between the last symbol of the first two single-port SRS resources (resource 0 to resource 1) in an SRS resource set (i.e., the last symbol of the second single-port SRS resource (resource 1)) and the first symbol of the last two single-port SRS resources (resource 2 to resource 3) (i.e., the first symbol of the third single-port SRS resource (resource 2)). In this case, the terminal first transmits the SRS via resources 0 to resource 1 in the SRS resource set. At this time, antenna switching occurs, and the terminal adds gap0 after resource 1. The terminal then transmits the SRS via resources 2 to resource 3.

[0203] In one example, in conjunction with the terminal RF architecture shown in Figure 3(a), still referring to Figure 4B(c), the network configures an SRS resource set for the terminal. This SRS resource set includes four single-port SRS resources, such as resource 0, resource 1, resource 2, and resource 3. The terminal can send the SRS on resource 0 via antenna 1 and on resource 1 via antenna 3. In this case, the terminal switches from antenna 1 to antenna 2, and adds gap 0 after the last symbol of resource 1. The terminal then sends the SRS on resource 2 via antenna 2 and on resource 3 via antenna 4.

[0204] In some embodiments, as shown in (d) of FIG4B , when {n0, n1} = {1, 3}, an antenna switching transmission gap (gap0) may be added between the last symbol of the first single-port SRS resource (resource 0) in an SRS resource set (i.e., the last symbol of the first single-port SRS resource (resource 0)) and the first symbol of the next three single-port SRS resources (resources 1 to 3) (i.e., the first symbol of the second single-port SRS resource (resource 1)). The terminal then first transmits the SRS via resource 0 in the SRS resource set. At this point, antenna switching occurs, and the terminal adds a gap0 after the last symbol of resource 0. The terminal then transmits the SRS via resources 1 to 3.

[0205] In one example, in conjunction with the terminal RF architecture shown in Figure 3(a), still referring to Figure 4B(d), the network configures an SRS resource set for the terminal. This SRS resource set includes four single-port SRS resources, such as resource 0, resource 1, resource 2, and resource 3. The terminal can send an SRS on resource 0 via antenna 1. At this time, it switches from antenna 1 to antenna 2, and the terminal adds gap 0 after the last symbol of resource 0. The terminal then sends an SRS on resource 1 via antenna 2, sends an SRS on resource 2 via antenna 3, and sends an SRS on resource 3 via antenna 4.

[0206] In some embodiments, N=2, the terminal transmits SRSs corresponding to four antenna ports on two 2-port SRS resources in one SRS resource set. Referring to FIG4C , the two 2-port SRS resources are resource 0 and resource 1, respectively.

[0207] In some embodiments, when transmitting SRS on two 2-port SRS resources in one SRS resource set, one antenna switching transmission interval may be sent between adjacent SRS resources. In one example, one SRS resource set includes two 2-port SRS resources, and the terminal adds one antenna switching transmission interval between the two 2-port SRS resources.

[0208] In some embodiments, the above-mentioned addition of one antenna switching transmission interval between adjacent SRS resources can be understood as adding one antenna switching transmission interval between the last symbol of the i-th 2-port SRS resource and the first symbol of the i+1-th 2-port SRS resource in an SRS resource set, where i is an integer less than or equal to N-1.

[0209] In some embodiments, an antenna switching transmission interval is added between two 2-port SRS resources, as shown in Figure 4C, which can be understood as adding an antenna switching transmission interval (gap0) between the last symbol of the first 2-port SRS resource (resource 0) and the first symbol of the second 2-port SRS resource (resource 1) in the SRS resource set.

[0210] In some embodiments, when a terminal transmits SRS on two 2-port SRS resources in one SRS resource set, an antenna switching transmission interval may be added when four receive antennas are switched. In one example, if four receive antennas are switched once, one antenna switching transmission interval may be added to the two 2-port SRS resources.

[0211] In some embodiments, when four receiving antennas are switched X times, the number of antennas before the jth switch is n. j The last symbol of the 2-port SRS resource is the same as the nth symbol after the jth switch. j+1 An antenna switching transmission interval is added between the first symbols of the 2-port SRS resources, where X is a positive integer, n j and n j+1 is a positive integer less than or equal to 3, and j is a positive integer less than or equal to X - 1. In one example, for a 3T4R terminal radio frequency architecture, in conjunction with (a) in FIG3 , X=1, j=0, and {n0, n1}={1, 1}.

[0212] In some embodiments, as shown in FIG4C , when {n0, n1} = {1, 1}, an antenna switching transmission gap (gap0) may be added between the last symbol of the first 2-port SRS resource (resource 0) (i.e., the last symbol of the first 2-port SRS resource (resource 0)) and the first symbol of the second 2-port SRS resource (resource 1) (i.e., the first symbol of the second 2-port SRS resource (resource 1)). The terminal then first transmits the SRS via resource 0 in the SRS resource set. At this point, antenna switching occurs, and the terminal adds a gap0 after the last symbol of resource 0. The terminal then transmits the SRS on resource 1.

[0213] In one example, in conjunction with the terminal RF architecture shown in Figure 3(a), still referring to Figure 4C, the network configures an SRS resource set for the terminal. This SRS resource set includes two 2-port SRS resources, such as resource 0 and resource 1. The terminal can send the SRS on resource 0 via antenna 1 and antenna 3. At this time, it switches from antenna 1 to antenna 2, and the terminal adds gap 0 after the last symbol of resource 0. The terminal then sends the SRS on resource 2 via antenna 2 and antenna 4.

[0214] In some embodiments, the N SRS resources belong to multiple SRS resource sets.

[0215] In some embodiments, the terminal transmits SRS on N SRS resources in a plurality of SRS resource sets. In one example, N=2 or 4.

[0216] In some embodiments, N=4, and the terminal sends SRSs corresponding to four antenna ports on three single-port SRS resources in one SRS resource set and one single-port SRS resource in another SRS resource set, as shown in (b) of FIG4B .

[0217] In some embodiments, N=4, and the terminal sends SRSs corresponding to four antenna ports on one single-port SRS resource in one SRS resource set and three single-port SRS resources in another SRS resource set, as shown in (c) of FIG4B .

[0218] In some embodiments, N=4, and the terminal transmits SRSs corresponding to four antenna ports on two single-port SRS resources in one SRS resource set and two single-port SRS resources in another SRS resource set, as shown in (d) of FIG4B .

[0219] In some embodiments, N=2, and the terminal transmits SRSs corresponding to four antenna ports on one 2-port SRS resource in one SRS resource set and one 2-port SRS resource in another SRS resource set, as shown in FIG4C .

[0220] In some embodiments, when the terminal transmits SRSs on multiple SRS resource sets, and the multiple SRS resource sets are scheduled to be transmitted on different time slots, the terminal does not need to add an antenna switching transmission interval.

[0221] In some embodiments, when a terminal transmits SRSs on multiple SRS resource sets, there is no need to add an antenna switching transmission interval between SRS resource sets scheduled to be transmitted on different time slots.

[0222] In some embodiments, when the terminal transmits SRSs on multiple SRS resource sets, and the multiple SRS resource sets are scheduled to be transmitted on the same time slot, the terminal may add one antenna switching transmission interval between adjacent SRS resource sets.

[0223] In some embodiments, when the terminal transmits SRS on multiple SRS resource sets, one antenna switching transmission interval needs to be added between the SRS resource sets scheduled to be transmitted on the same time slot.

[0224] In some embodiments, an antenna switching transmission interval is added between adjacent SRS resource sets, which can be understood as adding an antenna switching transmission interval between the last symbol of the last SRS resource in the kth SRS resource set in multiple SRS resource sets sent in the same time slot and the first symbol of the first SRS resource in the k+1th SRS resource set. The kth SRS resource set is adjacent to the k+1th SRS resource set, and k is a positive integer.

[0225] In some embodiments, two SRS resource sets are transmitted in the same time slot, namely SRS resource set 0 and SRS resource set 1. SRS resource set 0 includes three single-port SRS resources, and SRS resource set 1 includes one single-port SRS resource. In this case, one antenna switching transmission interval can be added between the last symbol of the last single-port SRS resource of SRS resource set 0 and the first symbol of the first single-port SRS resource of SRS resource set 1. Then, the terminal first transmits SRS through the three single-port SRS resources in SRS resource set 0. At this time, antenna switching occurs, and the terminal adds one antenna switching transmission interval after the last symbol of the third single-port SRS resource in SRS resource set 0. Then, the terminal transmits SRS on the one single-port SRS resource in SRS resource set 1.

[0226] In some embodiments, two SRS resource sets are sent in the same time slot, namely SRS resource set 0 and SRS resource set 1. SRS resource set 0 includes two single-port SRS resources, and SRS resource set 1 includes two single-port SRS resources. In this case, one antenna switching transmission interval can be added between the last symbol of the last single-port SRS resource of SRS resource set 0 and the first symbol of the first single-port SRS resource of SRS resource set 1. Then, the terminal first sends SRS through the two single-port SRS resources in SRS resource set 0. At this time, antenna switching occurs, and the terminal adds one antenna switching transmission interval after the last symbol of the second single-port SRS resource in SRS resource set 0. Then, the terminal sends SRS on the two single-port SRS resources in SRS resource set 1.

[0227] In some embodiments, two SRS resource sets are transmitted in the same time slot, namely SRS resource set 0 and SRS resource set 1. SRS resource set 0 includes one single-port SRS resource, and SRS resource set 1 includes two single-port SRS resources. In this case, one antenna switching transmission interval can be added between the last symbol of the last single-port SRS resource of SRS resource set 0 and the first symbol of the first single-port SRS resource of SRS resource set 1. Then, the terminal first transmits SRS through one single-port SRS resource in SRS resource set 0. At this time, antenna switching occurs, and the terminal adds one antenna switching transmission interval after the last symbol of the first single-port SRS resource in SRS resource set 0. Then, the terminal transmits SRS on the three single-port SRS resources in SRS resource set 1.

[0228] In some embodiments, two SRS resource sets are transmitted in the same time slot, namely SRS resource set 0 and SRS resource set 1. SRS resource set 0 includes one 2-port SRS resource, and SRS resource set 1 includes one 2-port SRS resource. In this case, one antenna switching transmission interval can be added between the last symbol of one 2-port SRS resource in SRS resource set 0 and the first symbol of one 2-port SRS resource in SRS resource set 1. Then, the terminal first transmits the SRS through one 2-port SRS resource in SRS resource set 0. At this time, antenna switching occurs, and the terminal adds one antenna switching transmission interval after the last symbol of the first 2-port SRS resource in SRS resource set 0. Then, the terminal transmits the SRS on one 2-port SRS resource in SRS resource set 1.

[0229] In the embodiment of the present disclosure, a terminal with 3 transmitting antennas and 4 receiving antennas transmits SRS on N SRS resources, so that a network device can obtain downlink CSI according to the SRS, thereby estimating the downlink channel.

[0230] Still referring to FIG4A , the embodiment of the present disclosure relates to a communication method, which includes steps S401 to S403 .

[0231] For the 3T6R terminal radio frequency architecture, in conjunction with (b) in FIG3 , the number of receiving antennas of the terminal is Y=6.

[0232] In step S401, the terminal sends third information.

[0233] In some embodiments, the network device receives third information.

[0234] In some embodiments, the network device may receive third information.

[0235] In some embodiments, the third information may be used to indicate the capability of the terminal.

[0236] In some embodiments, the third information may be used to indicate functions supported by the terminal.

[0237] In some embodiments, the name of the third information is not limited, and it can be, for example, capability information, UE capability, UE capability information, UE capability indication, function information, etc. The embodiments of the present disclosure do not make specific limitations on this.

[0238] In some embodiments, the third information may be carried in a ueCapabilityInformation information element (IE). In one example, the third information may be a supportedSRS-TxPortSwitch information element.

[0239] In some embodiments, the third information includes the fourth information.

[0240] In some embodiments, the fourth information may be used to indicate that the function is antenna switching.

[0241] In some embodiments, the fourth information may be used to indicate that the function of the SRS resource is antenna switching.

[0242] In some embodiments, the fourth information may be used to indicate that the purpose of the SRS resource set is antenna switching.

[0243] In some embodiments, the fourth information may be a usage information element. In one example, the value of the usage information element may be equal to "antennaSwitching," indicating that the function is antenna switching. For example, the value range of the usage information element may be {beamManagement, codebook, nonCodebook, antennaSwitching}. Therefore, for the terminal, the value of the usage information element in the third information may be equal to "antennaSwitching." Of course, the fourth information may also be other information elements or signaling, which is not specifically limited in the present embodiment.

[0244] In some embodiments, the third information may further include the first information.

[0245] In some embodiments, the first information is used to indicate a time domain offset of an antenna switching transmission interval (AS gap) supported by the terminal relative to the first SRS resource among the N SRS resources.

[0246] In some embodiments, the first information is used to indicate time domain resources occupied by an antenna switching transmission interval supported by the terminal.

[0247] In some embodiments, the antenna switching transmission interval may occupy one or more symbols (eg, OFDM symbols).

[0248] In some embodiments, the third information may further include the second information.

[0249] In some embodiments, the second information is used to indicate the time domain resources occupied by the antenna switching transmission interval determined by the terminal.

[0250] In some embodiments, the second information may be used to indicate the time domain offset of the antenna switching transmission interval determined by the terminal relative to the first SRS resource among the N SRS resources. Here, based on terminal implementation, the terminal may independently determine how to send the antenna switching transmission interval and indicate it to the network device through the first information, so that the network device and the terminal reach an agreement on the transmission of the antenna switching interval.

[0251] In some embodiments, the time domain offset of the antenna switching transmission interval relative to the first SRS resource among N SRS resources can be understood as the offset of the first symbol of the antenna switching transmission interval relative to the first symbol of the first SRS resource among N SRS resources, or can be understood as the number of symbols between the starting symbol of the antenna switching transmission interval and the starting symbol of the N SRS resources. In one example, the antenna switching transmission interval can be added after the third SRS resource among six SRS resources. In this case, the time domain offset can be the offset between the last symbol of the third SRS resource and the first symbol of the first SRS resource plus 1.

[0252] In some embodiments, the time domain offset of the antenna switching transmission interval relative to the first SRS resource among the N SRS resources may be preconfigured. In this case, the third information does not include the first information and the second information.

[0253] In some embodiments, the time domain offset of the antenna switching transmission interval relative to the first SRS resource among the N SRS resources may be configured by the network device. In this case, the third information does not include the first information and the second information.

[0254] In some embodiments, the network device may not receive the third information.

[0255] In some embodiments, the network device may not expect to receive the third information.

[0256] In step S402, the network device sends fourth information.

[0257] In some embodiments, the terminal receives fourth information.

[0258] In some embodiments, the fourth information is used to indicate an SRS resource set configured for the terminal. The number of the SRS resource set is one or more.

[0259] In some embodiments, the fourth information includes the fifth information.

[0260] In some embodiments, the fifth information may be used to configure the SRS resource type.

[0261] In some embodiments, the fifth information may be used to configure the resource type of the SRS resource set.

[0262] In some embodiments, the resource type of an SRS resource set may be used to indicate the periodicity of the SRS resources in the SRS resource set.

[0263] In some embodiments, the above resource types may include: periodic, semi-persistent, and aperiodic.

[0264] In some embodiments, the fifth information may be a resourceType information element. In one example, the value range of the resourceType information element may be {periodic, semi-persistent, aperiodic}. Therefore, for terminal 101, the value of the resourceType information element in the fourth information may be equal to any one of periodic, semi-persistent, and aperiodic. Of course, the fifth information may also be other information elements or signaling, which is not specifically limited in the present embodiment.

[0265] In some embodiments, when the resource type is aperiodic (the value of the resourceType information element is aperiodic), the SRS resource set supports an extended number of SRS resource sets. In one example, srs-ExtensionAperiodicSRS indicates that the SRS resource set supports an extended number of SRS resource sets.

[0266] In one embodiment, the number of the extended SRS resource sets may be 2, 3, 4, etc. Of course, the number of the extended SRS resource sets may also be other values, which are not specifically limited in the embodiment of the present disclosure.

[0267] In some embodiments, for a 3T6R terminal radio frequency architecture, the network device configures one SRS resource set for the terminal, where the SRS resource set includes N SRS resources, where N is an integer greater than or equal to 2. In one example, the SRS resource can be one of a single-port SRS resource, a two-port SRS resource, and the like.

[0268] In some embodiments, the network device configures one SRS resource set for the terminal, and the SRS resource set includes six single-port SRS resources. In this case, N=6.

[0269] In some embodiments, the network device configures one SRS resource set for the terminal, and the SRS resource set includes three 2-port SRS resources. In this case, N=3.

[0270] In some embodiments, the network device configures multiple SRS resource sets for the terminal, where the total number of SRS resources included in the multiple SRS resource sets is N. In one example, the network device configures 1, 2, 3, or 4 SRS resource sets for the terminal. In one example, the SRS resource can be one of a single-port SRS resource, a two-port SRS resource, etc.

[0271] In some embodiments, the SRS resources included in the multiple SRS resource sets are non-periodic SRS resources.

[0272] In some embodiments, the network device configures two SRS resource sets for the terminal (e.g., SRS resource set 0 and SRS resource set 1). In one example, SRS resource set 0 includes three single-port SRS resources, and SRS resource set 1 includes three single-port SRS resources. In one example, SRS resource set 0 includes two single-port SRS resources, and SRS resource set 1 includes four single-port SRS resources. SRS resource set 0 includes one two-port SRS resource, and SRS resource set 1 includes two two-port SRS resources.

[0273] In some embodiments, the network device configures three SRS resource sets for the terminal (e.g., SRS resource set 0, SRS resource set 1, and SRS resource set 2). In one example, SRS resource set 0 includes three single-port SRS resources, SRS resource set 1 includes two single-port SRS resources, and SRS resource set 2 includes one single-port SRS resource. In one example, SRS resource set 0 includes two single-port SRS resources, SRS resource set 1 includes two single-port SRS resources, and SRS resource set 2 includes two single-port SRS resources. In one example, SRS resource set 0 includes one two-port SRS resource, SRS resource set 1 includes one two-port SRS resource, and SRS resource set 2 includes one two-port SRS resource.

[0274] In some embodiments, the network device configures four SRS resource sets for the terminal (e.g., SRS resource set 0, SRS resource set 1, SRS resource set 2, and SRS resource set 3). In one example, SRS resource set 0 includes one single-port SRS resource, SRS resource set 1 includes two single-port SRS resources, SRS resource set 2 includes two single-port SRS resources, and SRS resource set 3 includes one single-port SRS resource.

[0275] In some embodiments, among N SRS resources, SRS resources configured to be sent at the same time domain location belong to the same SRS resource set, and SRS resources configured to be sent at different time domain locations belong to different SRS resource sets. In one example, the network device configures three SRS resource sets for the terminal (e.g., SRS resource set 0, SRS resource set 1, and SRS resource set 2). SRS resource set 0 includes two single-port SRS resources sent at the same time domain location, SRS resource set 1 includes two single-port SRS resources sent at the same time domain location, and SRS resource set 2 includes two single-port SRS resources sent at the same time domain location.

[0276] In some embodiments, the SRS resources sent at the same time domain position may be understood as configured SRS resources being the same time domain resources, or SRS resources allocated on the same time domain resources.

[0277] In some embodiments, the aforementioned SRS resources sent at different time domain locations may be understood as configured SRS resources being different time domain resources, or SRS resources allocated on different time domain resources.

[0278] In some embodiments, multiple SRS resource sets are configured by the network device to be sent in different time slots.

[0279] In some embodiments, multiple SRS resource sets are configured by the network device to be sent in the same time slot.

[0280] In some embodiments, the fourth information includes sixth information.

[0281] In some embodiments, when the terminal sends the first information, the fourth information includes the sixth information.

[0282] In some embodiments, the sixth information is used to indicate a time domain offset of an antenna switching transmission interval (AS gap) configured by the network device for the terminal relative to the first SRS resource among the N SRS resources.

[0283] In step S403, the terminal sends an SRS.

[0284] In some embodiments, the network device receives the SRS.

[0285] In some embodiments, the SRS is used for downlink channel estimation. In one example, the SRS is used for obtaining downlink CSI.

[0286] In some embodiments, the terminal transmits SRS on N SRS resources.

[0287] In some embodiments, N SRS resources belong to 1 SRS resource set.

[0288] In some embodiments, the terminal transmits SRS on N SRS resources in one SRS resource set. In one example, N=3 or 6.

[0289] In some embodiments, N=6, the terminal transmits SRS corresponding to six antenna ports on six single-port SRS resources in one single-port SRS resource set. Referring to FIG4D , the six single-port SRS resources are resource 0, resource 1, resource 2, resource 3, resource 4, and resource 5.

[0290] In some embodiments, when a terminal transmits an SRS on six single-port SRS resources in one SRS resource set, one antenna switching transmission interval may be added between adjacent SRS resources. In one example, one single-port SRS resource set includes six single-port SRS resources, and the terminal adds five antenna switching transmission intervals between the six single-port SRS resources.

[0291] In some embodiments, the above-mentioned addition of one antenna switching transmission interval between adjacent SRS resources can be understood as adding one antenna switching transmission interval between the last symbol of the i-th single-port SRS resource and the first symbol of the i+1-th single-port SRS resource in a single-port SRS resource set, where i is an integer less than or equal to N-1.

[0292] In some embodiments, five antenna switching transmission intervals are added between six single-port SRS resources, as shown in (a) of FIG4D , which can be understood as follows: in one SRS resource set, one antenna switching transmission interval (gap0) is added between the last symbol of the first single-port SRS resource (resource 0) and the first symbol of the second single-port SRS resource (resource 1), one antenna switching transmission interval (gap1) is added between the last symbol of the second single-port SRS resource (resource 1) and the first symbol of the third single-port SRS resource (resource 2), and one antenna switching transmission interval (gap2) is added between the last symbol of the second single-port SRS resource (resource 1) and the first symbol of the third single-port SRS resource (resource 2). An antenna switching transmission interval (gap2) is added between the last symbol of the third single-port SRS resource (resource 2) and the first symbol of the fourth single-port SRS resource (resource 3), an antenna switching transmission interval (gap3) is added between the last symbol of the fourth single-port SRS resource (resource 3) and the first symbol of the fifth single-port SRS resource (resource 4), and an antenna switching transmission interval (gap4) is added between the last symbol of the fifth single-port SRS resource (resource 4) and the first symbol of the sixth single-port SRS resource (resource 5).

[0293] In one example, in conjunction with the terminal RF architecture shown in Figure 3(b), still referring to Figure 4D(a), the network configures an SRS resource set for the terminal. This SRS resource set includes six single-port SRS resources, namely, resource 0, resource 1, resource 2, resource 3, resource 4, and resource 5. The terminal can transmit an SRS on resource 0 via antenna 1. At this time, antenna 1 switches to antenna 2, and the terminal adds gap 0 after the last symbol of resource 0. The terminal then transmits an SRS on resource 1 via antenna 2. The terminal adds gap 1 after the last symbol of resource 1. The terminal then transmits an SRS on resource 2 via antenna 3. At this time, antenna 3 switches to antenna 4. The terminal adds gap 2 after the last symbol of resource 2. The terminal then transmits an SRS on resource 3 via antenna 4. The terminal adds gap 3 after the last symbol of resource 3. The terminal then transmits an SRS on resource 4 via antenna 5. At this time, antenna 5 switches to antenna 6. The terminal adds gap 4 after the last symbol of resource 4. Then, the terminal sends the SRS on resource 5 through antenna 6.

[0294] In some embodiments, when a terminal transmits SRS on six single-port SRS resources in one SRS resource set, an antenna switching transmission interval may be added when the six receive antennas switch. In one example, the six receive antennas may switch once. Therefore, one antenna switching transmission interval may be added to the six single-port SRS resources. In another example, the six receive antennas may switch twice. Therefore, two antenna switching transmission intervals may be added to the six single-port SRS resources. In another example, the six receive antennas may switch three times. Therefore, three antenna switching transmission intervals may be added to the six single-port SRS resources.

[0295] In some embodiments, when 6 receiving antennas are switched X times, the n j The last symbol of the single-port SRS resource is the same as the nth symbol after the jth switch. j+1 An antenna switching transmission interval is added between the first symbols of the single-port SRS resources, where X is a positive integer, n j and n j+1 Is a positive integer less than or equal to 3, j is a positive integer less than or equal to X-1. In one example, for the 3T6R terminal RF architecture, combined with (b) in Figure 3, X=1, j=0, {n0,n1}={3,3}. In one example, for the 3T6R terminal RF architecture, combined with (b) in Figure 3, X=2, j=0 and 1, {n0,n1,n2}={2,2,2}. In one example, for the 3T6R terminal RF architecture, combined with (b) in Figure 3, X=2, j=0, 1 and 2, {n0,n1,n2,n3}={1,2,2,1}. Of course, based on the terminal implementation, X, j, n j and n j+1 The value of can be other values. The above is only an example and is not specifically limited in the embodiments of the present disclosure.

[0296] In some embodiments, as shown in FIG4D(b), when {n0, n1} = {3, 3}, an antenna switching transmission gap (gap0) can be added between the last symbol of the first three single-port SRS resources (resources 0 to 2) in an SRS resource set (i.e., the last symbol of the third single-port SRS resource (resource 2)) and the first symbol of the last three single-port SRS resources (resources 3 to 5) in the SRS resource set (i.e., the first symbol of the fourth single-port SRS resource (resource 3)). The terminal then first transmits the SRS via resources 0 to 2 in the SRS resource set. At this point, antenna switching occurs, and the terminal adds gap0 after the last symbol of resource 2. The terminal then transmits the SRS via resources 3 to 5.

[0297] In one example, in conjunction with the terminal RF architecture shown in FIG3(b), still referring to FIG4D(b), the network configures an SRS resource set for the terminal. This SRS resource set includes six single-port SRS resources, such as resource 0, resource 1, resource 2, resource 3, resource 4, and resource 5. The terminal can transmit an SRS on resource 0 via antenna 1, on resource 1 via antenna 3, and on resource 2 via antenna 5. In this case, the terminals switch from antenna 1 to antenna 2, then from antenna 3 to antenna 4, and finally from antenna 5 to antenna 6. The terminal adds a gap 0 after the last symbol of resource 2. The terminal then transmits an SRS on resource 3 via antenna 2, on resource 4 via antenna 4, and on resource 5 via antenna 6.

[0298] In some embodiments, as shown in FIG4D(c), when {n0, n1, n2} = {2, 2, 2}, the first antenna switching transmission interval (gap0) can be added between the last symbol of the two single-port SRS resources (resource 0 to resource 1) before the first switching (i.e., the last symbol of the second single-port SRS resource (resource 1)) and the first symbol of the two single-port SRS resources (resource 2 to resource 3) after the first switching (i.e., the first symbol of the third single-port SRS resource (resource 2)). The second antenna switching transmission interval (gap1) can be added between the last symbol of the two single-port SRS resources (resource 2 and resource 3) before the second switching (i.e., the last symbol of the fourth single-port SRS resource (resource 3)) and the first symbol of the two single-port SRS resources (resource 4 and resource 5) after the second switching (i.e., the first symbol of the fifth single-port SRS resource (resource 4)). Then, the terminal first sends the SRS from resource 0 to resource 1 in the SRS resource set. At this time, the first antenna switch occurs, and the terminal adds gap 0 after resource 1. The terminal then sends the SRS on resources 2 and 3. At this time, the second antenna switch occurs, and the terminal adds gap 1 after resource 3. The terminal then sends the SRS on resources 4 and 5.

[0299] In one example, in conjunction with the terminal RF architecture shown in FIG3(b), still referring to FIG4D(c), the network configures an SRS resource set for the terminal. This SRS resource set includes six single-port SRS resources, such as resource 0, resource 1, resource 2, resource 3, resource 4, and resource 5. The terminal can transmit an SRS on resource 0 via antenna 1 and on resource 1 via antenna 3. In this case, the terminal switches from antenna 1 to antenna 2, and adds gap 0 after the last symbol of resource 1. The terminal then transmits an SRS on resource 2 via antenna 2 and on resource 3 via antenna 5. In this case, the terminal switches from antenna 3 to antenna 4 and from antenna 5 to antenna 6, and adds gap 1 after the last symbol of resource 3. The terminal then transmits an SRS on resource 4 via antenna 4 and on resource 5 via antenna 6.

[0300] In some embodiments, as shown in (d) of FIG4D , when {n0, n1, n2, n3} = {1, 2, 2, 1}, the first antenna switching transmission interval may be added between the last symbol of the single-port SRS resource (resource 0) before the first switching (i.e., the last symbol of the first single-port SRS resource (resource 0)) and the first symbol of the two single-port SRS resources (resources 1 to 2) after the first switching (i.e., the first symbol of the second single-port SRS resource (resource 1)). The second antenna switching transmission interval may be added between the last symbol of the two single-port SRS resources (resource 2) before the second switching (i.e., the last symbol of the third single-port SRS resource (resource 2)) and the first symbol of the two single-port SRS resources (resources 3 and 4) after the second switching (i.e., the first symbol of the fourth single-port SRS resource (resource 3)). The third antenna switching transmission interval can be added between the last symbol of the two single-port SRS resources (resources 3 and 4) before the third switching (i.e., the last symbol of the fifth single-port SRS resource (resource 4)) and the first symbol of the single-port SRS resource (resource 5) after the third switching (i.e., the first symbol of the sixth single-port SRS resource (resource 5)). The terminal then first transmits the SRS using resource 0 in the SRS resource set. At this point, the first antenna switching occurs, and the terminal adds a gap 0 after resource 0. The terminal then transmits the SRS using resources 1 and 2. At this point, the second antenna switching occurs, and the terminal adds a gap 1 after resource 2. The terminal then transmits the SRS using resources 3 and 4. At this point, the third antenna switching occurs, and the terminal adds a gap 2 after resource 4. The terminal then transmits the SRS using resource 5.

[0301] In one example, in conjunction with the terminal RF architecture shown in Figure 3(b), still referring to Figure 4D(d), the network configures an SRS resource set for the terminal. This SRS resource set includes six single-port SRS resources, namely, resource 0, resource 1, resource 2, resource 3, resource 4, and resource 5. The terminal can transmit an SRS on resource 0 via antenna 1. At this time, antenna 1 switches to antenna 2, and the terminal adds gap 0 after the last symbol of resource 0. The terminal then transmits an SRS on resource 1 via antenna 2 and an SRS on resource 2 via antenna 3. At this time, antenna 3 switches to antenna 4, and the terminal adds gap 1 after the last symbol of resource 2. The terminal then transmits an SRS on resource 3 via antenna 4 and an SRS on resource 4 via antenna 5. At this time, antenna 5 switches to antenna 6, and the terminal adds gap 2 after the last symbol of resource 4. The terminal then transmits an SRS on resource 5 via antenna 6.

[0302] In some embodiments, N=3, the terminal transmits SRS corresponding to 6 antenna ports on three 2-port SRS resources in one SRS resource set. As shown in FIG4E , the three 2-port SRS resources are resource 0, resource 1, and resource 3.

[0303] In some embodiments, when a terminal transmits an SRS on three 2-port SRS resources in an SRS resource set, one antenna switching transmission interval may be added between adjacent SRS resources. In one example, an SRS resource set includes three 2-port SRS resources, and the terminal adds two antenna switching transmission intervals between the three 2-port SRS resources.

[0304] In some embodiments, the above-mentioned addition of one antenna switching transmission interval between adjacent SRS resources can be understood as adding one antenna switching transmission interval between the last symbol of the i-th 2-port SRS resource and the first symbol of the i+1-th 2-port SRS resource in an SRS resource set, where i is an integer less than or equal to N-1.

[0305] In some embodiments, two antenna switching transmission intervals are added between three 2-port SRS resources, as shown in Figure 4E. This can be understood as adding one antenna switching transmission interval (gap0) between the last symbol of the first 2-port SRS resource (resource 0) and the first symbol of the second 2-port SRS resource (resource 1) in the SRS resource set, and adding one antenna switching transmission interval (gap1) between the last symbol of the second 2-port SRS resource (resource 1) and the first symbol of the third 2-port SRS resource (resource 2).

[0306] In some embodiments, when a terminal transmits SRS on three 2-port SRS resources within a single SRS resource set, an antenna switching transmission interval may be added when the six receive antennas switch. In one example, as shown in Figure 3(b), the six receive antennas switch twice. Therefore, two antenna switching transmission intervals may be added to the six 2-port SRS resources.

[0307] In some embodiments, when 6 receiving antennas are switched X times, the n j The last symbol of the 2-port SRS resource is the same as the nth symbol after the jth switch. j+1 An antenna switching transmission interval is added between the first symbols of the 2-port SRS resources, where X is a positive integer, n j and n j+1 is a positive integer less than or equal to 3, and j is a positive integer less than or equal to X-1. In one example, for the 3T6R terminal RF architecture, combined with (b) in Figure 3, X = 2, j = 0 and 1, {n0, n1, n2} = {1, 1, 1}. Of course, based on the terminal implementation, X, j, n j and n j+1 The value of can be other values. The above is only an example and is not specifically limited in the embodiments of the present disclosure.

[0308] In some embodiments, as shown in FIG4E , when {n0, n1, n2} = {1, 1, 1}, the first antenna switching transmission interval (gap0) may be added between the last symbol of the 2-port SRS resource (resource 0) before the first switching (i.e., the last symbol of the first 2-port SRS resource (resource 0)) and the first symbol of the 2-port SRS resource (resource 1) after the first switching (i.e., the first symbol of the second 2-port SRS resource (resource 1)). The second antenna switching transmission interval (gap1) may be added between the last symbol of the 2-port SRS resource (resource 1) before the second switching (i.e., the last symbol of the second 2-port SRS resource (resource 1)) and the first symbol of the 2-port SRS resource (resource 2) after the second switching (i.e., the first symbol of the third 2-port SRS resource (resource 2)). Then, the terminal first sends the SRS through resource 0 in the SRS resource set. At this time, the first antenna switch occurs, and the terminal adds gap 0 after resource 0. Then, the terminal sends the SRS on resource 1. At this time, the second antenna switch occurs, and the terminal adds gap 1 after resource 1. Then, the terminal sends the SRS on resource 2.

[0309] In one example, in conjunction with the terminal RF architecture shown in FIG3(b), still referring to FIG4E, the network configures an SRS resource set for the terminal, which includes three 2-port SRS resources, such as resource 0, resource 1, and resource 2. The terminal can send the SRS on resource 0 via antenna 1 and antenna 3. In this case, the terminal switches from antenna 1 to antenna 2, and adds gap 0 after the last symbol of resource 0. The terminal then sends the SRS on resource 1 via antenna 2 and antenna 5. In this case, the terminal switches from antenna 3 to antenna 4 and from antenna 5 to antenna 6, and adds gap 1 after the last symbol of resource 1. The terminal then sends the SRS on resource 2 via antenna 4 and antenna 6.

[0310] In some embodiments, the N SRS resources belong to multiple SRS resource sets.

[0311] In some embodiments, the terminal transmits SRS on N SRS resources in a plurality of SRS resource sets. In one example, N=3 or 6.

[0312] In some embodiments, the network device may configure 2, 3, or 4 SRS resource sets for the terminal.

[0313] In some embodiments, N=6, and the number of SRS resource sets is 2. The terminal transmits SRSs corresponding to 6 antenna ports on 3 single-port SRS resources in the first SRS resource set and 3 single-port SRS resources in the second SRS resource set, as shown in FIG4D(b).

[0314] In some embodiments, N=6, and the number of SRS resource sets is 3. The terminal transmits SRSs corresponding to 6 antenna ports on 3 single-port SRS resources in the first SRS resource set, 2 single-port SRS resources in the second SRS resource set, and 1 single-port SRS resource in the third SRS resource set.

[0315] In some embodiments, N=6, and the number of SRS resource sets is 3. The terminal transmits SRSs corresponding to six antenna ports on two single-port SRS resources in the first SRS resource set, two single-port SRS resources in the second SRS resource set, and two single-port SRS resources in the third SRS resource set, as shown in (c) of FIG4D .

[0316] In some embodiments, N=6, and the number of SRS resource sets is 4. The terminal transmits SRSs corresponding to six antenna ports on one single-port SRS resource in the first SRS resource set, two single-port SRS resources in the second SRS resource set, two single-port SRS resources in the third SRS resource set, and one single-port SRS resource in the fourth SRS resource set, as shown in (d) of FIG4D .

[0317] In some embodiments, N=6, and the number of SRS resource sets is 4. The terminal transmits SRSs corresponding to six antenna ports on three single-port SRS resources in the first SRS resource set, one single-port SRS resource in the second SRS resource set, one single-port SRS resource in the third SRS resource set, and one single-port SRS resource in the fourth SRS resource set.

[0318] In some embodiments, N=3, and the number of SRS resource sets is 3. The terminal transmits SRSs corresponding to six antenna ports on one 2-port SRS resource in the first SRS resource set, one 2-port SRS resource in the second SRS resource set, and one 2-port SRS resource in the third SRS resource set, as shown in FIG4E .

[0319] In some embodiments, N=3, and the number of SRS resource sets is 2. The terminal has two 2-port SRS resources in the first SRS resource set and one 2-port SRS resource in the second SRS resource set.

[0320] It should be noted that, based on terminal implementation, the number of SRS resource sets and the number of SRS resources in each SRS resource set may also be other values. The above are only examples and are not specifically limited in the embodiments of the present disclosure.

[0321] In some embodiments, when the terminal transmits SRSs on multiple SRS resource sets, and the multiple SRS resource sets are scheduled to be transmitted on different time slots, the terminal does not need to add an antenna switching transmission interval.

[0322] In some embodiments, when a terminal transmits SRSs on multiple SRS resource sets, there is no need to add an antenna switching transmission interval between SRS resource sets scheduled to be transmitted on different time slots.

[0323] In some embodiments, when the terminal transmits SRSs on multiple SRS resource sets, and the multiple SRS resource sets are scheduled to be transmitted on the same time slot, the terminal may add one antenna switching transmission interval between adjacent SRS resource sets.

[0324] In some embodiments, when the terminal transmits SRS on multiple SRS resource sets, one antenna switching transmission interval needs to be added between the SRS resource sets scheduled to be transmitted on the same time slot.

[0325] In some embodiments, an antenna switching transmission interval is added between adjacent SRS resource sets, which can be understood as adding an antenna switching transmission interval between the last symbol of the last SRS resource in the kth SRS resource set in multiple SRS resource sets sent in the same time slot and the first symbol of the first SRS resource in the k+1th SRS resource set. The kth SRS resource set is adjacent to the k+1th SRS resource set, and k is a positive integer.

[0326] In some embodiments, two SRS resource sets are transmitted in the same time slot, namely SRS resource set 0 and SRS resource set 1. SRS resource set 0 includes three single-port SRS resources, and SRS resource set 1 includes three single-port SRS resources. In this case, one antenna switching transmission interval can be added between the last symbol of the last single-port SRS resource of SRS resource set 0 and the first single-port SRS resource of SRS resource set 1. Then, the terminal first transmits SRS through the three single-port SRS resources in SRS resource set 0. At this time, antenna switching occurs, and the terminal adds one antenna switching transmission interval after the last symbol of the third single-port SRS resource in SRS resource set 0. Then, the terminal transmits SRS on the three single-port SRS resources in SRS resource set 1.

[0327] In some embodiments, three SRS resource sets are transmitted in the same time slot: SRS resource set 0, SRS resource set 1, and SRS resource set 2. SRS resource set 0 includes two single-port SRS resources, SRS resource set 1 includes two single-port SRS resources, and SRS resource set 2 includes two single-port SRS resources. In this case, the first antenna switching transmission interval can be added between the last symbol of the last single-port SRS resource of SRS resource set 0 and the first symbol of the first single-port SRS resource of SRS resource set 1. The second antenna switching transmission interval can be added between the last symbol of the last single-port SRS resource of SRS resource set 1 and the first symbol of the first single-port SRS resource of SRS resource set 2. The terminal then first transmits SRS using the two single-port SRS resources in SRS resource set 0. At this point, antenna switching occurs, and the terminal adds one antenna switching transmission interval after the last symbol of the second single-port SRS resource in SRS resource set 0. The terminal then transmits the SRS on the two single-port SRS resources in SRS resource set 1. Antenna switching occurs at this time. The terminal adds an antenna switching transmission interval after the last symbol of the second single-port SRS resource in SRS resource set 1. The terminal then transmits the SRS on the two single-port SRS resources in SRS resource set 2.

[0328] In some embodiments, four SRS resource sets are transmitted in the same time slot: SRS resource set 0, SRS resource set 1, SRS resource set 2, and SRS resource set 3. SRS resource set 0 includes one single-port SRS resource, SRS resource set 1 includes two single-port SRS resources, SRS resource set 2 includes two single-port SRS resources, and SRS resource set 3 includes one single-port SRS resource. In this case, the first antenna switching transmission interval can be added between the last symbol of the last single-port SRS resource of SRS resource set 0 and the first symbol of the first single-port SRS resource of SRS resource set 1. The second antenna switching transmission interval can be added between the last symbol of the last single-port SRS resource of SRS resource set 1 and the first symbol of the first single-port SRS resource of SRS resource set 2. The third antenna switching transmission interval can be added between the last symbol of the last single-port SRS resource of SRS resource set 2 and the first symbol of the first single-port SRS resource of SRS resource set 3. Then, the terminal first sends the SRS through one single-port SRS resource in SRS resource set 0. At this time, antenna switching occurs, and the terminal adds one antenna switching transmission interval after the last symbol of the first single-port SRS resource in SRS resource set 0. Then, the terminal sends the SRS on two single-port SRS resources in SRS resource set 1. At this time, antenna switching occurs. The terminal adds one antenna switching transmission interval after the last symbol of the second single-port SRS resource in SRS resource set 1. Then, the terminal sends the SRS on two single-port SRS resources in SRS resource set 2. At this time, antenna switching occurs. The terminal adds one antenna switching transmission interval after the last symbol of the second single-port SRS resource in SRS resource set 2. Then, the terminal sends the SRS on one single-port SRS resource in SRS resource set 3.

[0329] In some embodiments, three SRS resource sets are transmitted in the same time slot: SRS resource set 0, SRS resource set 1, and SRS resource set 2. SRS resource set 0 includes one 2-port SRS resource, SRS resource set 1 includes one 2-port SRS resource, and SRS resource set 2 includes one 2-port SRS resource. In this case, the first antenna switching transmission interval can be added between the last symbol of the last 2-port SRS resource in SRS resource set 0 and the first symbol of the first 2-port SRS resource in SRS resource set 1. The second antenna switching transmission interval can be added between the last symbol of the last 2-port SRS resource in SRS resource set 1 and the first symbol of the first 2-port SRS resource in SRS resource set 2. The terminal then first transmits an SRS using one 2-port SRS resource in SRS resource set 0. At this point, antenna switching occurs, and the terminal adds one antenna switching transmission interval after the last symbol of the first 2-port SRS resource in SRS resource set 0. The terminal then transmits an SRS on a two-port SRS resource in SRS resource set 1. Antenna switching occurs at this time. The terminal adds an antenna switching transmission interval after the last symbol of the first two-port SRS resource in SRS resource set 1. The terminal then transmits an SRS on a two-port SRS resource in SRS resource set 2.

[0330] In the embodiment of the present disclosure, a terminal with 3 transmitting antennas and 6 receiving antennas transmits SRS on N SRS resources, so that a network device can obtain downlink CSI according to the SRS, thereby realizing estimation of the downlink channel.

[0331] Still referring to FIG4A , the embodiment of the present disclosure relates to a communication method, which includes steps S401 to S403 .

[0332] For the 3T8R terminal RF architecture, combined with (c) and (d) in Figure 3, the number of receiving antennas of the terminal is Y=8.

[0333] In step S401, the terminal sends third information.

[0334] In some embodiments, the network device receives third information.

[0335] In some embodiments, the network device may receive third information.

[0336] In some embodiments, the third information may be used to indicate the capability of the terminal.

[0337] In some embodiments, the third information may be used to indicate functions supported by the terminal.

[0338] In some embodiments, the name of the third information is not limited, and it can be, for example, capability information, UE capability, UE capability information, UE capability indication, function information, etc. The embodiments of the present disclosure do not make specific limitations on this.

[0339] In some embodiments, the third information may be carried in a ueCapabilityInformation information element (IE). In one example, the third information may be a supportedSRS-TxPortSwitch information element.

[0340] In some embodiments, the third information includes the fourth information.

[0341] In some embodiments, the fourth information may be used to indicate that the function is antenna switching.

[0342] In some embodiments, the fourth information may be used to indicate that the function of the SRS resource is antenna switching.

[0343] In some embodiments, the fourth information may be used to indicate that the purpose of the SRS resource set is antenna switching.

[0344] In some embodiments, the fourth information may be a usage information element. In one example, the value of the usage information element may be equal to "antennaSwitching," indicating that the function is antenna switching. For example, the value range of the usage information element may be {beamManagement, codebook, nonCodebook, antennaSwitching}. Therefore, for the terminal, the value of the usage information element in the third information may be equal to "antennaSwitching." Of course, the fourth information may also be other information elements or signaling, which is not specifically limited in the present embodiment.

[0345] In some embodiments, the third information may further include the first information.

[0346] In some embodiments, the first information is used to indicate a time domain offset of an antenna switching transmission interval (AS gap) supported by the terminal relative to the first SRS resource among the N SRS resources.

[0347] In some embodiments, the first information is used to indicate time domain resources occupied by an antenna switching transmission interval supported by the terminal.

[0348] In some embodiments, the antenna switching transmission interval may occupy one or more symbols (eg, OFDM symbols).

[0349] In some embodiments, the third information may further include the second information.

[0350] In some embodiments, the second information is used to indicate the time domain resources occupied by the antenna switching transmission interval determined by the terminal.

[0351] In some embodiments, the second information may be used to indicate the time domain offset of the antenna switching transmission interval determined by the terminal relative to the first SRS resource among the N SRS resources. Here, based on terminal implementation, the terminal may independently determine how to send the antenna switching transmission interval and indicate it to the network device through the first information, so that the network device and the terminal reach an agreement on the transmission of the antenna switching interval.

[0352] In some embodiments, the time domain offset of the antenna switching transmission interval relative to the first SRS resource among N SRS resources can be understood as the offset of the first symbol of the antenna switching transmission interval relative to the first symbol of the first SRS resource among N SRS resources, or can be understood as the number of symbols between the starting symbol of the antenna switching transmission interval and the starting symbol of the N SRS resources. In one example, the antenna switching transmission interval can be added after the third SRS resource among eight SRS resources. In this case, the time domain offset can be the offset between the last symbol of the third SRS resource and the first symbol of the first SRS resource plus 1.

[0353] In some embodiments, the time domain offset of the antenna switching transmission interval relative to the first SRS resource among the N SRS resources may be preconfigured. In this case, the third information does not include the first information and the second information.

[0354] In some embodiments, the time domain offset of the antenna switching transmission interval relative to the first SRS resource among the N SRS resources may be configured by the network device. In this case, the third information does not include the first information and the second information.

[0355] In some embodiments, the network device may not receive the third information.

[0356] In some embodiments, the network device may not expect to receive the third information.

[0357] In step S402, the network device sends fourth information.

[0358] In some embodiments, the terminal receives fourth information.

[0359] In some embodiments, the fourth information is used to indicate an SRS resource set configured for the terminal. The number of the SRS resource set is one or more.

[0360] In some embodiments, the fourth information includes the fifth information.

[0361] In some embodiments, the fifth information may be used to configure the SRS resource type.

[0362] In some embodiments, the fifth information may be used to configure the resource type of the SRS resource set.

[0363] In some embodiments, the resource type of an SRS resource set may be used to indicate the periodicity of the SRS resources in the SRS resource set.

[0364] In some embodiments, the above resource types may include: periodic, semi-persistent, and aperiodic.

[0365] In some embodiments, the fifth information may be a resourceType information element. In one example, the value range of the resourceType information element may be {periodic, semi-persistent, aperiodic}. Therefore, for terminal 101, the value of the resourceType information element in the fourth information may be equal to any one of periodic, semi-persistent, and aperiodic. Of course, the fifth information may also be other information elements or signaling, which is not specifically limited in the present embodiment.

[0366] In some embodiments, when the resource type is aperiodic (the value of the resourceType information element is aperiodic), the SRS resource set supports an extended number of SRS resource sets. In one example, srs-ExtensionAperiodicSRS indicates that the SRS resource set supports an extended number of SRS resource sets.

[0367] In one embodiment, the number of the extended SRS resource sets may be 3, 4, etc. Of course, the number of the extended SRS resource sets may also be other values, which are not specifically limited in the embodiment of the present disclosure.

[0368] In some embodiments, for a 3T8R terminal radio frequency architecture, the network device configures an SRS resource set for the terminal, where the SRS resource set includes N SRS resources, where N is an integer greater than or equal to 2. In one example, the SRS resource can be one of a single-port SRS resource, a 2-port SRS resource, and the like.

[0369] In some embodiments, the network device configures one SRS resource set for the terminal, and the SRS resource set includes eight single-port SRS resources. In this case, N=8.

[0370] In some embodiments, the network device configures one SRS resource set for the terminal, and the SRS resource set includes four 2-port SRS resources. In this case, N=4.

[0371] In some embodiments, the network device configures multiple SRS resource sets for the terminal, where the total number of SRS resources included in the multiple SRS resource sets is N. In one example, the network device configures 3 or 4 SRS resource sets for the terminal. In one example, the SRS resource can be one of a single-port SRS resource, a two-port SRS resource, etc.

[0372] In some embodiments, the SRS resources included in the multiple SRS resource sets are non-periodic SRS resources.

[0373] In some embodiments, the network device configures three SRS resource sets for the terminal (e.g., SRS resource set 0, SRS resource set 1, and SRS resource set 2). In one example, SRS resource set 0 includes three single-port SRS resources, SRS resource set 1 includes three single-port SRS resources, and SRS resource set 2 includes two single-port SRS resources.

[0374] In some embodiments, the network device configures four SRS resource sets for the terminal (e.g., SRS resource set 0, SRS resource set 1, SRS resource set 2, and SRS resource set 3). In one example, SRS resource set 0 includes three single-port SRS resources, SRS resource set 1 includes three single-port SRS resources, SRS resource set 2 includes one single-port SRS resource, and SRS resource set 3 includes one single-port SRS resource. In one example, SRS resource set 0 includes two single-port SRS resources, SRS resource set 1 includes two single-port SRS resources, SRS resource set 2 includes two single-port SRS resources, and SRS resource set 3 includes two single-port SRS resources.

[0375] In some embodiments, among N SRS resources, SRS resources configured to be sent at the same time domain location belong to the same SRS resource set, and SRS resources configured to be sent at different time domain locations belong to different SRS resource sets. In one example, the network device configures three SRS resource sets for the terminal (e.g., SRS resource set 0, SRS resource set 1, and SRS resource set 2). SRS resource set 0 includes three single-port SRS resources sent at the same time domain location, SRS resource set 1 includes three single-port SRS resources sent at the same time domain location, and SRS resource set 2 includes two single-port SRS resources sent at the same time domain location.

[0376] In some embodiments, the SRS resources sent at the same time domain position may be understood as configured SRS resources being the same time domain resources, or SRS resources allocated on the same time domain resources.

[0377] In some embodiments, the aforementioned SRS resources sent at different time domain locations may be understood as configured SRS resources being different time domain resources, or SRS resources allocated on different time domain resources.

[0378] In some embodiments, multiple SRS resource sets are configured by the network device to be sent in different time slots.

[0379] In some embodiments, multiple SRS resource sets are configured by the network device to be sent in the same time slot.

[0380] In some embodiments, the fourth information includes sixth information.

[0381] In some embodiments, when the terminal sends the first information, the fourth information includes the sixth information.

[0382] In some embodiments, the sixth information is used to indicate a time domain offset of an antenna switching transmission interval (AS gap) configured by the network device for the terminal relative to the first SRS resource among the N SRS resources.

[0383] In step S403, the terminal sends an SRS.

[0384] In some embodiments, the network device receives the SRS.

[0385] In some embodiments, the SRS is used for downlink channel estimation. In one example, the SRS is used for obtaining downlink CSI.

[0386] In some embodiments, the terminal transmits SRS on N SRS resources.

[0387] In some embodiments, N SRS resources belong to one SRS resource set.

[0388] In some embodiments, the terminal transmits SRS on N SRS resources in one SRS resource set. In one example, N=4 or 8.

[0389] In some embodiments, N=8, the terminal transmits SRS corresponding to eight antenna ports on eight single-port SRS resources in one SRS resource set. Referring to FIG4F , the eight single-port SRS resources are resource 0, resource 1, resource 2, resource 3, resource 4, resource 5, resource 6, and resource 7.

[0390] In some embodiments, when a terminal transmits SRS on eight SRS resources in an SRS resource set, one antenna switching transmission interval may be added between adjacent SRS resources. In one example, an SRS resource set includes eight single-port SRS resources, and the terminal adds seven antenna switching transmission intervals between the eight SRS resources.

[0391] In some embodiments, the above-mentioned addition of an antenna switching transmission interval between adjacent SRS resources can be understood as: adding an antenna switching transmission interval between the last symbol of the i-th SRS resource in an SRS resource set and the first symbol of the i+1-th SRS resource, where i is an integer less than or equal to N-1.

[0392] In some embodiments, 7 antenna switching transmission intervals are added between 8 single-port SRS resources, as shown in (a) of FIG4F , which can be understood as: in 1 single-port SRS resource set, 1 antenna switching transmission interval (gap0) is added between the last symbol of the 1st single-port SRS resource (resource 0) and the 1st symbol of the 2nd single-port SRS resource (resource 1), 1 antenna switching transmission interval (gap1) is added between the last symbol of the 2nd single-port SRS resource (resource 1) and the 1st symbol of the 3rd single-port SRS resource (resource 2), 1 antenna switching transmission interval (gap2) is added between the last symbol of the 3rd single-port SRS resource (resource 2) and the 1st symbol of the 4th single-port SRS resource (resource 3), and 1 antenna switching transmission interval (gap3) is added between the last symbol of the 3rd single-port SRS resource (resource 2) and the 1st symbol of the 4th single-port SRS resource (resource 3). An antenna switching transmission interval (gap3) is added between the last symbol of the 4th single-port SRS resource (resource 3) and the first symbol of the 5th single-port SRS resource (resource 4), an antenna switching transmission interval (gap4) is added between the last symbol of the 5th single-port SRS resource (resource 4) and the first symbol of the 6th single-port SRS resource (resource 5), an antenna switching transmission interval (gap5) is added between the last symbol of the 6th single-port SRS resource (resource 5) and the first symbol of the 7th single-port SRS resource (resource 6), and an antenna switching transmission interval (gap6) is added between the last symbol of the 7th single-port SRS resource (resource 6) and the first symbol of the 8th single-port SRS resource (resource 7).

[0393] In one example, in conjunction with the terminal RF architecture shown in Figure 3(c), still referring to Figure 4F(a), the network configures an SRS resource set for the terminal. This SRS resource set includes eight single-port SRS resources, namely, resource 0, resource 1, resource 2, resource 3, resource 4, resource 5, resource 6, and resource 7. The terminal can transmit an SRS on resource 0 via antenna 1. At this time, antenna 1 switches to antenna 2, and the terminal adds gap 0 after the last symbol of resource 0. The terminal then transmits an SRS on resource 1 via antenna 2. At this time, antenna 2 switches to antenna 3. The terminal adds gap 1 after the last symbol of resource 1. The terminal then transmits an SRS on resource 2 via antenna 3. The terminal adds gap 2 after the last symbol of resource 2. The terminal then transmits an SRS on resource 3 via antenna 4. The terminal adds gap 3 after the last symbol of resource 3. At this time, antenna 4 switches to antenna 5. The terminal then transmits an SRS on resource 4 via antenna 5, and at this time, antenna 5 switches to antenna 6. The terminal adds gap 4 after the last symbol of resource 4. Then, the terminal transmits the SRS on resource 5 via antenna 6. The terminal adds gap 5 after the last symbol of resource 5. Then, the terminal transmits the SRS on resource 6 via antenna 7. At this time, the transmission is switched from antenna 7 to antenna 8. The terminal adds gap 6 after the last symbol of resource 6. Then, the terminal transmits the SRS on resource 7 via antenna 8.

[0394] In one example, in conjunction with the terminal RF architecture shown in Figure 3(d), still referring to Figure 4F(a), the network configures an SRS resource set for the terminal. This SRS resource set includes eight single-port SRS resources, namely, resource 0, resource 1, resource 2, resource 3, resource 4, resource 5, resource 6, and resource 7. The terminal can transmit an SRS on resource 0 via antenna 1. At this time, antenna 1 switches to antenna 2, and the terminal adds gap 0 after the last symbol of resource 0. The terminal then transmits an SRS on resource 1 via antenna 2. The terminal adds gap 1 after the last symbol of resource 1. The terminal then transmits an SRS on resource 2 via antenna 3. The terminal adds gap 2 after the last symbol of resource 2. At this time, antenna 3 switches to antenna 4. The terminal then transmits an SRS on resource 3 via antenna 4. The terminal adds gap 3 after the last symbol of resource 3. The terminal then transmits an SRS on resource 4 via antenna 5, and at this time, antenna 5 switches to antenna 6. The terminal adds gap 4 after the last symbol of resource 4. Then, the terminal transmits the SRS on resource 5 via antenna 6. At this point, antenna 6 switches to antenna 7. The terminal adds gap 5 after the last symbol of resource 5. Then, the terminal transmits the SRS on resource 6 via antenna 7. At this point, antenna 7 switches to antenna 8. The terminal adds gap 6 after the last symbol of resource 6. Then, the terminal transmits the SRS on resource 7 via antenna 8.

[0395] In some embodiments, when a terminal transmits SRS on eight SRS resources within an SRS resource set, an antenna switching transmission interval may be added when the eight receive antennas switch. In one example, the eight receive antennas may switch twice. Therefore, two antenna switching transmission intervals may be added to the eight SRS resources. In another example, the eight receive antennas may switch three times. Therefore, three antenna switching transmission intervals may be added to the eight SRS resources.

[0396] In some embodiments, when 8 receiving antennas are switched X times, the n j The last symbol of the single-port SRS resource is the same as the nth symbol after the jth switch. j+1 An antenna switching transmission interval is added between the first symbols of the single-port SRS resources, where X is a positive integer, n j and n j+1Is a positive integer less than or equal to 3, j is a positive integer less than or equal to X-1. In one example, for the 3T8R terminal RF architecture, combined with (c) and (d) in Figure 3, X=2, j=0 and 1, {n0,n1,n2}={3,3,2}. In one example, for the 3T8R terminal RF architecture, combined with (c) and (d) in Figure 3, X=2, j=0, 1 and 2, {n0,n1,n2,n3}={3,3,1,1} or {2,2,2,2}. Of course, based on the terminal implementation, X, j, n j and n j+1 The value of can be other values. The above is only an example and is not specifically limited in the embodiments of the present disclosure.

[0397] In some embodiments, as shown in FIG4F(b), when {n0, n1, n2} = {3, 3, 2}, the first antenna switching transmission interval (gap0) can be added between the last symbol of the three single-port SRS resources (resources 0 to 2) before the first switching (i.e., the last symbol of the third single-port SRS resource (resource 2)) and the first symbol of the three single-port SRS resources (resources 3 to 5) after the first switching (i.e., the first symbol of the fourth single-port SRS resource (resource 3)). The second antenna switching transmission interval (gap1) can be added between the last symbol of the three single-port SRS resources (resources 3 to 5) before the second switching (i.e., the last symbol of the sixth single-port SRS resource (resource 5)) and the first symbol of the two single-port SRS resources (resources 6 to 7) after the second switching (i.e., the first symbol of the seventh single-port SRS resource (resource 6)). The terminal first sends the SRS from resource 0 to resource 2 in the SRS resource set. At this point, the first antenna switch occurs, and the terminal adds gap 0 after resource 2. The terminal then sends the SRS from resource 3 to resource 5. At this point, the second antenna switch occurs, and the terminal adds gap 1 after resource 5. The terminal then sends the SRS from resource 6 to resource 7.

[0398] In one example, in conjunction with the terminal RF architecture shown in FIG3(c), still referring to FIG4F(b), the network configures an SRS resource set for the terminal. This SRS resource set includes eight single-port SRS resources, namely, resource 0, resource 1, resource 2, resource 3, resource 4, resource 5, resource 6, and resource 7. The terminal can transmit an SRS on resource 0 via antenna 1, on resource 1 via antenna 4, and on resource 2 via antenna 7. In this case, the terminal switches from antenna 1 to antenna 2, from antenna 4 to antenna 5, and from antenna 7 to antenna 8. The terminal adds a gap 0 after the last symbol of resource 2. The terminal can then transmit an SRS on resource 3 via antenna 2, on resource 4 via antenna 5, and on resource 5 via antenna 8. In this case, the terminal switches from antenna 2 to antenna 3 and from antenna 5 to antenna 6. The terminal adds a gap 1 after the last symbol of resource 5. The terminal then transmits an SRS on resource 6 via antenna 3 and on resource 7 via antenna 6.

[0399] In some embodiments, as shown in FIG4F(c), when {n0, n1, n2, n3} = {3, 3, 1, 1}, the first antenna switching transmission interval (gap0) can be added between the last symbol of the three single-port SRS resources (resources 0 to 2) before the first switching (i.e., the last symbol of the third single-port SRS resource (resource 2)) and the first symbol of the three single-port SRS resources (resources 3 to 5) after the first switching (i.e., the first symbol of the fourth single-port SRS resource (resource 3)). The second antenna switching transmission interval (gap1) can be added between the last symbol of the three single-port SRS resources (resources 3 to 5) before the second switching (i.e., the last symbol of the sixth single-port SRS resource (resource 5)) and the first symbol of the single-port SRS resource (resource 6) after the second switching (i.e., the first symbol of the seventh single-port SRS resource (resource 6)). The third antenna switching transmission interval (gap2) can be added between the last symbol of a single-port SRS resource (resource 6) before the third switching (i.e., the last symbol of the seventh single-port SRS resource (resource 6)) and the first symbol of a single-port SRS resource (resource 7) after the third switching (i.e., the first symbol of the eighth single-port SRS resource (resource 7)). The terminal then first transmits the SRS from resources 0 to 2 in the SRS resource set. At this point, the first antenna switching occurs, and the terminal adds gap0 after resource 2. The terminal then transmits the SRS from resources 3 to 5. At this point, the second antenna switching occurs, and the terminal adds gap1 after resource 5. The terminal then transmits the SRS on resource 6. At this point, the third antenna switching occurs, and the terminal adds gap2 after resource 6. The terminal then transmits the SRS on resource 7.

[0400] In one example, in conjunction with the terminal RF architecture shown in Figure 3(d), still referring to Figure 4F(c), the network configures an SRS resource set for the terminal. This SRS resource set includes eight single-port SRS resources, namely, resource 0, resource 1, resource 2, resource 3, resource 4, resource 5, resource 6, and resource 7. The terminal can transmit an SRS on resource 0 via antenna 1, on resource 1 via antenna 3, and on resource 2 via antenna 5. In this case, the terminal switches from antenna 1 to antenna 2, from antenna 3 to antenna 4, and from antenna 5 to antenna 6. The terminal adds gap 0 after the last symbol of resource 2. The terminal can then transmit an SRS on resource 3 via antenna 2, on resource 4 via antenna 4, and on resource 5 via antenna 6. In this case, the terminal switches from antenna 6 to antenna 7. The terminal adds gap 1 after the last symbol of resource 5. The terminal then transmits an SRS on resource 6 via antenna 7. In this case, the terminal switches from antenna 7 to antenna 8. The terminal adds gap 2 after the last symbol of resource 6. The terminal transmits SRS on resource 7 through antenna 8.

[0401] In some embodiments, as shown in (d) of FIG4F , when {n0, n1, n2, n3} = {2, 2, 2, 2}, the first antenna switching transmission interval (gap0) can be added between the last symbol of the two single-port SRS resources (resource 0 to resource 1) before the first switching (i.e., the last symbol of the second single-port SRS resource (resource 1)) and the first symbol of the two single-port SRS resources (resource 2 to resource 3) after the first switching (i.e., the first symbol of the third single-port SRS resource (resource 2)). The second antenna switching transmission interval (gap1) can be added between the last symbol of the two single-port SRS resources (resource 2 to resource 3) before the second switching (i.e., the last symbol of the fourth single-port SRS resource (resource 3)) and the first symbol of the two single-port SRS resources (resource 4 to resource 5) after the second switching (i.e., the first symbol of the fifth single-port SRS resource (resource 4)). The third antenna switching transmission interval (gap2) can be added between the last symbol of the two single-port SRS resources (resources 4 and 5) before the third switching (i.e., the last symbol of the sixth single-port SRS resource (resource 5)) and the first symbol of the two single-port SRS resources (resources 6 and 7) after the third switching (i.e., the first symbol of the seventh single-port SRS resource (resource 6)). The terminal then first transmits the SRS from resources 0 to 1 in the SRS resource set. At this time, the first antenna switching occurs, and the terminal adds gap0 after resource 1. The terminal then transmits the SRS from resources 2 to 3. At this time, the second antenna switching occurs, and the terminal adds gap1 after resource 3. The terminal then transmits the SRS from resources 4 to 5. At this time, the third antenna switching occurs, and the terminal adds gap2 after resource 5. The terminal then transmits the SRS from resources 6 to 7.

[0402] In some embodiments, N=4, the terminal transmits SRS corresponding to 6 antenna ports on 4 2-port SRS resources in one SRS resource set. Referring to FIG4G , the 4 2-port SRS resources are resource 0, resource 1, resource 2, and resource 3.

[0403] In some embodiments, when a terminal transmits an SRS on four 2-port SRS resources in an SRS resource set, one antenna switching transmission interval may be added between adjacent SRS resources. In one example, an SRS resource set includes four 2-port SRS resources, and the terminal adds three antenna switching transmission intervals between the four 2-port SRS resources.

[0404] In some embodiments, the above-mentioned addition of one antenna switching transmission interval between adjacent SRS resources can be understood as adding one antenna switching transmission interval between the last symbol of the i-th 2-port SRS resource and the first symbol of the i+1-th 2-port SRS resource in an SRS resource set, where i is an integer less than or equal to N-1.

[0405] In some embodiments, three antenna switching transmission intervals are added between four 2-port SRS resources, as shown in FIG4G , which can be understood as: in the SRS resource set, one antenna switching transmission interval (gap0) is added between the last symbol of the first 2-port SRS resource (resource 0) and the first symbol of the second 2-port SRS resource (resource 1), one antenna switching transmission interval (gap1) is added between the last symbol of the second 2-port SRS resource (resource 1) and the first symbol of the third 2-port SRS resource (resource 2), and one antenna switching transmission interval (gap2) is added between the last symbol of the third 2-port SRS resource (resource 2) and the first symbol of the fourth 2-port SRS resource (resource 3).

[0406] In some embodiments, when a terminal transmits SRS on four 2-port SRS resources within an SRS resource set, an antenna switching transmission interval may be added when eight receive antennas switch. In one example, as shown in Figures 3(c) and 3(d), six receive antennas switch three times. Therefore, three antenna switching transmission intervals may be added to the four 2-port SRS resources.

[0407] In some embodiments, when 8 receiving antennas are switched X times, the n j The last symbol of the 2-port SRS resource is the same as the nth symbol after the jth switch. j+1 An antenna switching transmission interval is added between the first symbols of the 2-port SRS resources, where X is a positive integer, n j and n j+1 is a positive integer less than or equal to 3, and j is a positive integer less than or equal to X-1. In one example, for the 3T8R terminal RF architecture, combined with (c) and (d) in Figure 3, X = 3, j = 0, 1 and 2, {n0, n1, n2, n3} = {1, 1, 1, 1}. Of course, based on the terminal implementation, X, j, n j and n j+1 The value of can be other values. The above is only an example and is not specifically limited in the embodiments of the present disclosure.

[0408] In some embodiments, as shown in FIG4G , when {n0, n1, n2, n3} = {1, 1, 1, 1}, the first antenna switching transmission interval (gap0) may be added between the last symbol of a 2-port SRS resource (resource 0) before the first switching (i.e., the last symbol of the first 2-port SRS resource (resource 0)) and the first symbol of a 2-port SRS resource (resource 1) after the first switching (i.e., the first symbol of the second 2-port SRS resource (resource 1)). The second antenna switching transmission interval (gap1) may be added between the last symbol of a 2-port SRS resource (resource 1) before the second switching (i.e., the last symbol of the second 2-port SRS resource (resource 1)) and the first symbol of a 2-port SRS resource (resource 2) after the second switching (i.e., the first symbol of the third 2-port SRS resource (resource 2)). The third antenna switching transmission interval (gap2) can be added between the last symbol of a 2-port SRS resource (resource 2) before the third switching (i.e., the last symbol of the third 2-port SRS resource (resource 2)) and the first symbol of a 2-port SRS resource (resource 3) after the third switching (i.e., the first symbol of the fourth 2-port SRS resource (resource 3)). The terminal then first transmits the SRS through resource 0 in the SRS resource set. At this time, the first antenna switching occurs, and the terminal adds gap0 after resource 0. The terminal then transmits the SRS on resource 1. At this time, the second antenna switching occurs, and the terminal adds gap1 after resource 1. The terminal then transmits the SRS on resource 2. At this time, the third antenna switching occurs, and the terminal adds gap2 after resource 2. The terminal then transmits the SRS on resource 3.

[0409] In one example, in conjunction with the 3T8R terminal RF architecture shown in Figure 3(c), still referring to Figure 4G, the network configures an SRS resource set for the terminal. This SRS resource set includes four 2-port SRS resources, such as resource 0, resource 1, resource 2, and resource 3. The terminal can transmit the SRS on resource 0 via antenna 1 and antenna 4. In this case, antenna 1 switches to antenna 2, and the terminal adds gap 0 after the last symbol of resource 0. The terminal can then transmit the SRS on resource 1 via antenna 2 and antenna 7. In this case, antenna 2 switches to antenna 3, and then switches from antenna 4 to antenna 5. The terminal adds gap 1 after the last symbol of resource 1. The terminal then transmits the SRS on resource 2 via antenna 3 and antenna 5. In this case, antenna 5 switches to antenna 6, and then switches from antenna 7 to antenna 8. The terminal adds gap 2 after the last symbol of resource 2. The terminal then transmits the SRS on resource 3 via antenna 6 and antenna 8.

[0410] In one example, in conjunction with the 3T8R terminal RF architecture shown in Figure 3(d), still referring to Figure 4G, the network configures an SRS resource set for the terminal. This SRS resource set includes four 2-port SRS resources, such as resource 0, resource 1, resource 2, and resource 3. The terminal can transmit the SRS on resource 0 via antennas 1 and 5. At this time, antenna 1 switches to antenna 2, and then switches to antenna 6. The terminal adds gap 0 after the last symbol of resource 0. The terminal can then transmit the SRS on resource 1 via antennas 2 and 6. At this time, antenna 6 switches to antenna 7. The terminal adds gap 1 after the last symbol of resource 1. The terminal then transmits the SRS on resource 2 via antennas 3 and 7. At this time, antenna 3 switches to antenna 4, and then switches to antenna 8. The terminal adds gap 2 after the last symbol of resource 2. The terminal then transmits the SRS on resource 3 via antennas 4 and 8.

[0411] In some embodiments, the N SRS resources belong to multiple SRS resource sets.

[0412] In some embodiments, the terminal transmits SRS on N SRS resources in a plurality of SRS resource sets. In one example, N=4 or 8.

[0413] In some embodiments, the network device may configure 3 or 4 SRS resource sets for the terminal.

[0414] In some embodiments, N=8, and the number of SRS resource sets is 3. The terminal transmits SRSs corresponding to 8 antenna ports on 3 single-port SRS resources in the first SRS resource set, 3 single-port SRS resources in the second SRS resource set, and 2 single-port SRS resources in the third SRS resource set, as shown in (b) of FIG4F .

[0415] In some embodiments, N=8, and the number of SRS resource sets is 4. The terminal transmits SRSs corresponding to 8 antenna ports on 3 single-port SRS resources in the first SRS resource set, 3 single-port SRS resources in the second SRS resource set, 1 single-port SRS resource in the third SRS resource set, and 1 single-port SRS resource in the fourth SRS resource set, as shown in (c) of FIG4F .

[0416] In some embodiments, N=8, and the number of SRS resource sets is 4. The terminal transmits SRSs corresponding to 8 antenna ports on 2 single-port SRS resources in the first SRS resource set, 2 single-port SRS resources in the second SRS resource set, 2 single-port SRS resources in the third SRS resource set, and 2 single-port SRS resources in the fourth SRS resource set, as shown in (d) of FIG4F .

[0417] In some embodiments, N=4, the terminal sends SRSs corresponding to 8 antenna ports on one 2-port SRS resource in the first SRS resource set, one 2-port SRS resource in the second SRS resource set, one 2-port SRS resource in the third SRS resource set, and one 2-port SRS resource in the fourth SRS resource set, as shown in Figure 4G.

[0418] It should be noted that, based on terminal implementation, the number of SRS resource sets and the number of SRS resources in each SRS resource set may also be other values. The above are only examples and are not specifically limited in the embodiments of the present disclosure.

[0419] In some embodiments, when the terminal transmits SRSs on multiple SRS resource sets, and the multiple SRS resource sets are scheduled to be transmitted on different time slots, the terminal does not need to add an antenna switching transmission interval.

[0420] In some embodiments, when a terminal transmits SRSs on multiple SRS resource sets, there is no need to add an antenna switching transmission interval between SRS resource sets scheduled to be transmitted on different time slots.

[0421] In some embodiments, when the terminal transmits SRSs on multiple SRS resource sets, and the multiple SRS resource sets are scheduled to be transmitted on the same time slot, the terminal may add one antenna switching transmission interval between adjacent SRS resource sets.

[0422] In some embodiments, when the terminal transmits SRS on multiple SRS resource sets, one antenna switching transmission interval needs to be added between the SRS resource sets scheduled to be transmitted on the same time slot.

[0423] In some embodiments, an antenna switching transmission interval is added between adjacent SRS resource sets, which can be understood as adding an antenna switching transmission interval between the last symbol of the last SRS resource in the kth SRS resource set in multiple SRS resource sets sent in the same time slot and the first symbol of the first SRS resource in the k+1th SRS resource set. The kth SRS resource set is adjacent to the k+1th SRS resource set, and k is a positive integer.

[0424] In some embodiments, three SRS resource sets are transmitted in the same time slot: SRS resource set 0, SRS resource set 1, and SRS resource set 2. SRS resource set 0 includes three single-port SRS resources, SRS resource set 1 includes three single-port SRS resources, and SRS resource set 2 includes two single-port SRS resources. In this case, the first antenna switching transmission interval can be added between the last symbol of the last single-port SRS resource in SRS resource set 0 and the first symbol of the first single-port SRS resource in SRS resource set 1. The second antenna switching transmission interval can be added between the last symbol of the last single-port SRS resource in SRS resource set 1 and the first symbol of the first single-port SRS resource in SRS resource set 2. The terminal then first transmits SRS using the three single-port SRS resources in SRS resource set 0. At this point, antenna switching occurs, and the terminal adds one antenna switching transmission interval after the last symbol of the third single-port SRS resource in SRS resource set 0. The terminal then transmits the SRS on the three single-port SRS resources in SRS resource set 1. Antenna switching occurs at this time. The terminal adds an antenna switching transmission interval after the last symbol of the third single-port SRS resource in SRS resource set 1. The terminal then transmits the SRS on the two single-port SRS resources in SRS resource set 2.

[0425] In some embodiments, four SRS resource sets are transmitted in the same time slot, namely, SRS resource set 0, SRS resource set 1, SRS resource set 2, and SRS resource set 3. SRS resource set 0 includes three single-port SRS resources, SRS resource set 1 includes three single-port SRS resources, SRS resource set 2 includes one single-port SRS resource, and SRS resource set 3 includes one single-port SRS resource. In this case, the first antenna switching transmission interval can be added between the last symbol of the last single-port SRS resource of SRS resource set 0 and the first symbol of the first single-port SRS resource of SRS resource set 1. The second antenna switching transmission interval can be added between the last symbol of the last single-port SRS resource of SRS resource set 1 and the first symbol of the first single-port SRS resource of SRS resource set 2. The third antenna switching transmission interval can be added between the last symbol of the last single-port SRS resource of SRS resource set 2 and the first symbol of the first single-port SRS resource of SRS resource set 3. Then, the terminal first sends the SRS through the three single-port SRS resources in SRS resource set 0. At this time, antenna switching occurs, and the terminal adds one antenna switching transmission interval after the last symbol of the third single-port SRS resource in SRS resource set 0. Then, the terminal sends the SRS on the three single-port SRS resources in SRS resource set 1. At this time, antenna switching occurs. The terminal adds one antenna switching transmission interval after the last symbol of the third single-port SRS resource in SRS resource set 1. Then, the terminal sends the SRS on one single-port SRS resource in SRS resource set 2. At this time, antenna switching occurs. The terminal adds one antenna switching transmission interval after the last symbol of the first single-port SRS resource in SRS resource set 2. Then, the terminal sends the SRS on one single-port SRS resource in SRS resource set 3.

[0426] In some embodiments, four SRS resource sets are transmitted in the same time slot: SRS resource set 0, SRS resource set 1, SRS resource set 2, and SRS resource set 3. SRS resource set 0 includes two single-port SRS resources, SRS resource set 1 includes two single-port SRS resources, SRS resource set 2 includes two single-port SRS resources, and SRS resource set 3 includes two single-port SRS resources. In this case, the first antenna switching transmission interval can be added between the last symbol of the last two-port SRS resource of SRS resource set 0 and the first symbol of the first two-port SRS resource of SRS resource set 1. The second antenna switching transmission interval can be added between the last symbol of the last two-port SRS resource of SRS resource set 1 and the first symbol of the first two-port SRS resource of SRS resource set 2. The third antenna switching transmission interval can be added between the last symbol of the last two-port SRS resource of SRS resource set 2 and the first symbol of the first two-port SRS resource of SRS resource set 3. Then, the terminal first sends the SRS through the two single-port SRS resources in SRS resource set 0. At this time, antenna switching occurs, and the terminal adds one antenna switching transmission interval after the last symbol of the second single-port SRS resource in SRS resource set 0. Then, the terminal sends the SRS on the two single-port SRS resources in SRS resource set 1. At this time, antenna switching occurs. The terminal adds one antenna switching transmission interval after the last symbol of the second single-port SRS resource in SRS resource set 1. Then, the terminal sends the SRS on the two single-port SRS resources in SRS resource set 2. At this time, antenna switching occurs. The terminal adds one antenna switching transmission interval after the last symbol of the second single-port SRS resource in SRS resource set 2. Then, the terminal sends the SRS on the two single-port SRS resources in SRS resource set 3.

[0427] In some embodiments, four SRS resource sets are transmitted in the same time slot: SRS resource set 0, SRS resource set 1, and SRS resource set 2. SRS resource set 0 includes one 2-port SRS resource, SRS resource set 1 includes one 2-port SRS resource, SRS resource set 2 includes one 2-port SRS resource, and SRS resource set 3 includes one 2-port SRS resource. In this case, the first antenna switching transmission interval can be added between the last symbol of the last 2-port SRS resource in SRS resource set 0 and the first symbol of the first 2-port SRS resource in SRS resource set 1. The second antenna switching transmission interval can be added between the last symbol of the last 2-port SRS resource in SRS resource set 1 and the first symbol of the first 2-port SRS resource in SRS resource set 2. The terminal then first transmits an SRS using one 2-port SRS resource in SRS resource set 0. At this point, antenna switching occurs, and the terminal adds one antenna switching transmission interval after the last symbol of the first 2-port SRS resource in SRS resource set 0. The terminal then transmits an SRS on a two-port SRS resource in SRS resource set 1. Antenna switching occurs at this time. The terminal adds an antenna switching transmission interval after the last symbol of the first two-port SRS resource in SRS resource set 1. The terminal then transmits an SRS on a two-port SRS resource in SRS resource set 2. Antenna switching occurs at this time. The terminal adds an antenna switching transmission interval after the last symbol of the first two-port SRS resource in SRS resource set 2. The terminal then transmits an SRS on a two-port SRS resource in SRS resource set 3.

[0428] In the embodiment of the present disclosure, a terminal with 3 transmitting antennas and 8 receiving antennas transmits SRS on N SRS resources, so that a network device can obtain downlink CSI according to the SRS, thereby estimating the downlink channel.

[0429] In some embodiments, the terms "single-port SRS resource", "1-port SRS resource", etc. can be used interchangeably.

[0430] In some embodiments, the names of information, etc. are not limited to the names described in the embodiments, and terms such as "information", "message", "signal", "signaling", "report", "configuration", "indication", "instruction", "command", "channel", "parameter", "domain", "field", "symbol", "symbol", "codeword", "codebook", "codeword", "codepoint", "bit", "data", "program", and "chip" can be used interchangeably.

[0431] In some embodiments, the terms "codebook," "codeword," and "precoding matrix" may be used interchangeably. For example, a codebook may be a collection of one or more codewords / precoding matrices.

[0432] In some embodiments, terms such as "uplink", "uplink", "physical uplink" can be interchangeable with each other, and terms such as "downlink", "downlink", "physical downlink" can be interchangeable with each other, and terms such as "side", "sidelink", "side communication", "sidelink communication", "direct connection", "direct link", "direct communication", "direct link communication" can be interchangeable with each other.

[0433] In some embodiments, the terms "DCI", "downlink (DL) assignment", "DL DCI", "uplink (UL) grant", "UL DCI" and the like may be used interchangeably.

[0434] In some embodiments, terms such as "physical downlink shared channel (PDSCH)" and "DL data" may be used interchangeably, and terms such as "PUSCH" and "UL data" may be used interchangeably.

[0435] In some embodiments, the terms "radio", "wireless", "radio access network (RAN)", "access network (AN)", "RAN-based" and the like may be used interchangeably.

[0436] In some embodiments, terms such as "moment", "time point", "time", and "time position" can be replaced with each other, and terms such as "duration", "period", "time window", "window", and "time" can be replaced with each other.

[0437] In some embodiments, terms such as "resource block (RB)", "physical resource block (PRB)", "sub-carrier group (SCG)", "resource element group (REG)", "PRB pair", "RB pair", "resource element (RE)", and "sub-carrier" can be used interchangeably.

[0438] In some embodiments, the terms "precoding", "precoder", "weight", "precoding weight", "quasi-co-location (QCL)", "transmission configuration indication (TCI) state", "spatial relation", "spatial domain filter", "transmission power", "phase rotation", "antenna port", "antenna port group", "layer", "the number of layers", "rank", "resource", "resource set", "resource group", "beam", "beam width", "beam angular degree", "antenna", "antenna element", "panel" and the like can be used interchangeably.

[0439] In some embodiments, terms such as "frame", "radio frame", "subframe", "slot", "sub-slot", "mini-slot", "symbol", "symbol", and "transmission time interval (TTI)" can be used interchangeably.

[0440] In some embodiments, "obtain", "get", "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 higher layers, obtaining by self-processing, autonomous implementation, etc.

[0441] In some embodiments, terms such as "send", "transmit", "report", "download", "transmit", "bidirectional transmission", "send and / or receive" can be used interchangeably.

[0442] In some embodiments, terms such as "certain", "preset", "preset", "setting", "indicated", "some", "any", and "first" can be interchangeable. "Specific A", "preset A", "preset A", "setting A", "indicated A", "some A", "any A", and "first A" can be interpreted as A pre-specified in a protocol, etc., or as A obtained through setting, configuration, or indication, etc., or as specific A, some A, any A, or first A, etc., but not limited to this.

[0443] In some embodiments, the determination or judgment can be performed by a value represented by 1 bit (0 or 1), or 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 thereto.

[0444] The communication method involved in the embodiments of the present disclosure may include at least one of steps S401 to S403. For example, step S401 can be implemented as an independent embodiment. For example, step S402 can be implemented as an independent embodiment. For example, step S403 can be implemented as an independent embodiment. For example, steps S401 to S402 can be implemented as independent embodiments. For example, steps S402 to S403 can be implemented as independent embodiments. For example, steps S401 to S403 can be implemented as independent embodiments. It should be noted that one or more steps in steps S401 to S403 may constitute a possible independent embodiment, but are not limited to this.

[0445] In some embodiments, step S401 is optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0446] In some embodiments, step S403 is optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0447] As shown in Figure 5A, Figure 5A is a 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 performed by a terminal 101 in a communication system 100. The communication method of the present disclosure embodiment includes steps S5101 to S5103.

[0448] In some embodiments, the terminal may adopt the terminal radio frequency architecture shown in FIG4A , namely 3T4R, 3T6R or 3T8R.

[0449] In step S5101, the third information is sent.

[0450] The optional implementation of step S5101 can refer to the optional implementation of step S401 in Figure 4A and other related parts in the embodiment involved in Figure 4A, which will not be repeated here.

[0451] In some embodiments, the terminal sends the third information to the network device, but is not limited thereto, and the third information may also be sent by other entities.

[0452] In step S5102, fourth information is received.

[0453] The optional implementation of step S5102 can refer to the optional implementation of step S402 in Figure 4A and other related parts in the embodiment involved in Figure 4A, which will not be repeated here.

[0454] In some embodiments, the terminal receives the fourth information sent by the network device, but is not limited thereto, and may also receive the fourth information sent by other entities.

[0455] In step S5103, SRS is sent.

[0456] The optional implementation of step S5103 can refer to the optional implementation of step S403 in Figure 4A and other related parts in the embodiment involved in Figure 4A, which will not be repeated here.

[0457] In some embodiments, the terminal sends the SRS to the network device, but is not limited thereto and may also send the SRS to other entities.

[0458] The communication method involved in the embodiments of the present disclosure may include at least one of steps S5101 to S5103. For example, step S5101 can be implemented as an independent embodiment. For example, step S5102 can be implemented as an independent embodiment. For example, step S5103 can be implemented as an independent embodiment. For example, steps S5101 to S5102 can be implemented as independent embodiments. For example, steps S5102 to S5103 can be implemented as independent embodiments. For example, steps S5101 to S5103 can be implemented as independent embodiments. It should be noted that one or more steps in steps S5101 to S5103 may constitute a possible independent embodiment, but are not limited to this.

[0459] In some embodiments, step S5101 is optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0460] In some embodiments, step S5103 is optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0461] As shown in Figure 5B, Figure 5B is a 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 performed by the network device 102 in the communication system 100. The communication method of the present disclosure embodiment includes steps S5201 to S5203.

[0462] In some embodiments, the terminal may adopt the terminal radio frequency architecture shown in FIG4A , namely 3T4R, 3T6R or 3T8R.

[0463] In step S5201, third information is received.

[0464] The optional implementation of step S5101 can refer to the optional implementation of step S401 in Figure 4A and other related parts in the embodiment involved in Figure 4A, which will not be repeated here.

[0465] In some embodiments, the network device receives the third information sent by the terminal, but is not limited thereto and may also receive the third information sent by other entities.

[0466] In step S5202, the fourth information is sent.

[0467] The optional implementation of step S5102 can refer to the optional implementation of step S402 in Figure 4A and other related parts in the embodiment involved in Figure 4A, which will not be repeated here.

[0468] In some embodiments, the network device sends the fourth information to the terminal, but is not limited thereto, and the fourth information may also be sent to other entities.

[0469] In step S5203, SRS is received.

[0470] The optional implementation of step S5103 can refer to the optional implementation of step S403 in Figure 4A and other related parts in the embodiment involved in Figure 4A, which will not be repeated here.

[0471] In some embodiments, the network device receives an SRS sent by a terminal, but is not limited thereto and may also receive an SRS sent by other entities.

[0472] The communication method involved in the embodiments of the present disclosure may include at least one of steps S5201 to S5203. For example, step S5201 can be implemented as an independent embodiment. For example, step S5202 can be implemented as an independent embodiment. For example, step S5103 can be implemented as an independent embodiment. For example, steps S5201 to S5202 can be implemented as independent embodiments. For example, steps S5202 to S5203 can be implemented as independent embodiments. For example, steps S5201 to S5203 can be implemented as independent embodiments. It should be noted that one or more steps in steps S5201 to S5203 may constitute a possible independent embodiment, but are not limited to this.

[0473] In some embodiments, step S5201 is optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0474] In some embodiments, step S5203 is optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0475] FIG6A is a schematic diagram of another implementation flow of a communication method performed by a terminal side according to an embodiment of the present disclosure. As shown in FIG6A , the embodiment of the present disclosure relates to a communication method. The communication method includes step S6101.

[0476] In step S6101, SRS is sent on N SRS resources.

[0477] The optional implementation of step S6101 can refer to the optional implementation of step S403 in FIG4A and other related parts in the embodiment involved in FIG4A, which will not be described in detail here.

[0478] In some embodiments, the above method may include the method described in the above embodiments on the terminal side, network device side, etc., which will not be repeated here.

[0479] FIG6B is another flow chart of another embodiment of the communication method performed by a network device according to an embodiment of the present disclosure. As shown in FIG6B , the embodiment of the present disclosure relates to a communication method. The communication method includes step S6201.

[0480] In step S6201, an SRS is received on N SRS resources.

[0481] The optional implementation of step S6201 can refer to the optional implementation of step S403 in Figure 4A and other related parts in the embodiment involved in Figure 3, which will not be repeated here.

[0482] In some embodiments, the above method may include the method described in the above embodiments on the terminal side, network device side, etc., which will not be repeated here.

[0483] Hereinafter, the embodiments of the present disclosure are exemplarily described through specific implementation methods.

[0484] For a terminal with three transmitting antennas (3Tx terminal), the SRS transmission method with antenna switching is as follows:

[0485] 1. For the 3T4R terminal RF architecture, the antenna switching configuration is as follows:

[0486] Case 1: an SRS resource set is configured, and the SRS resource set type is one of a periodic SRS resource set, a semi-persistent SRS resource set, and an aperiodic SRS resource set.

[0487] Solution 1: Configure four single-port SRS resources.

[0488] In some embodiments, for an aperiodic SRS resource set, the terminal supports an extended configuration function and is enabled by the network configuration srs-ExtensionAperiodicSRS, which requires extending the number of aperiodic SRS resources supported in an SRS resource set.

[0489] In some embodiments, referring to the 3T4R terminal RF architecture shown in FIG3(a), only one antenna switching transmission interval is required. Compared to adding an antenna switching transmission interval between each SRS resource, the number of transmitted symbols is reduced from 7 to 5. Here, it is assumed that one SRS resource occupies one symbol and one antenna switching transmission interval occupies one symbol.

[0490] In some embodiments, an antenna switching transmission interval is added at a default or predefined fixed symbol position, for example, one antenna switching transmission interval is added after the first symbol.

[0491] In some embodiments, the terminal reports to the network device to indicate the time domain location of the antenna switching transmission interval. For example, the terminal may indicate the location of the antenna switching transmission interval after the first symbol, after the third symbol, or indicate the SRS resource grouping (e.g., 1 SRS resource + 3 SRS resources, 2 SRS resources + 2 SRS resources, 3 SRS resources + 1 SRS resource, etc.), and the network device may configure the specific transmission location or pattern.

[0492] In some embodiments, the terminal reports the terminal capability to the network device, and the terminal capability may include information indicating the position of the antenna switching transmission interval in the time domain.

[0493] By using the above method, when uplink resources are tight within a time slot, uplink transmission resources can be saved.

[0494] Case 2: Configure two 2-port SRS resources.

[0495] In some embodiments, when the resource type is non-periodic, two SRS resource sets are configured, and four single-port SRS resources are configured in each of the two resource sets.

[0496] In some embodiments, the default configuration is predefined. For example, three SRS resources are configured in the first SRS resource set, and one SRS resource is configured in the second SRS resource set. Different SRS resource sets are transmitted in different time slots, so no antenna switching interval is required between the SRS resources transmitted by each SRS resource set.

[0497] In some embodiments, the SRS resource configuration configured by the base station after the terminal capability report is used for transmission. Different SRS resource sets are transmitted in different time slots, so there is no need for antenna switching transmission intervals between the SRS resources configured in each SRS resource set.

[0498] For a terminal with three transmitting antennas (3Tx terminal), the SRS transmission method with antenna switching is as follows:

[0499] 2. For the 3T6R terminal RF architecture, the antenna switching configuration is similar to the above 3T4R. The antenna switching configuration is as follows:

[0500] Case 1: an SRS resource set is configured, and the SRS resource set type is one of a periodic SRS resource set, a semi-persistent SRS resource set, and an aperiodic SRS resource set.

[0501] Solution 1: Configure 6 single-port SRS resources.

[0502] In some embodiments, for an aperiodic SRS resource set, the terminal supports an extended configuration function and is enabled by the network configuration srs-ExtensionAperiodicSRS, which requires extending the number of aperiodic SRS resources supported in an SRS resource set.

[0503] In some embodiments, referring to the 3T6R terminal RF architecture shown in FIG3(b), only one antenna switching transmission interval, two antenna switching transmission intervals, or three antenna switching transmission intervals need to be added. In this way, compared to adding an antenna switching transmission interval between each SRS resource, the number of symbols sent can be reduced from 11 symbols to a maximum of 7 symbols. Here, it is assumed that one SRS resource occupies one symbol and one antenna switching transmission interval occupies one symbol.

[0504] In some embodiments, an antenna switching transmission interval is added between each SRS resource.

[0505] In some embodiments, an antenna switching transmission interval is added at a default or predefined fixed symbol position, for example, one antenna switching transmission interval is added after the first symbol.

[0506] In some embodiments, the terminal reports to the network device to indicate the time domain location of the antenna switching transmission interval. For example, the terminal may indicate the addition of the antenna switching transmission interval after the first symbol, the addition of the antenna switching transmission interval after the third symbol, or the indication of SRS resource grouping (e.g., 3 SRS resources + 3 SRS resources, 1 SRS resource + 2 SRS resources + 2 SRS resources + 1 SRS resource, 2 SRS resources + 2 SRS resources + 2 SRS resources, etc.), and the network device may configure the specific transmission location or pattern.

[0507] In some embodiments, the terminal reports the terminal capability to the network device, and the terminal capability may include information indicating the position of the antenna switching transmission interval in the time domain.

[0508] By using the above method, when uplink resources are tight within a time slot, uplink transmission resources can be saved.

[0509] Case 2: Configure three 2-port SRS resources.

[0510] In some embodiments, when the resource type is non-periodic, four SRS resource sets are configured, and a total of six single-port SRS resources are configured in the four resource sets.

[0511] In some embodiments, when the resource type is non-periodic, three SRS resource sets are configured, and a total of six single-port SRS resources are configured in the three resource sets, or a total of three two-port SRS resources are configured in the three resource sets.

[0512] In some embodiments, when the resource type is non-periodic, two SRS resource sets are configured, and a total of six single-port SRS resources are configured in the two resource sets, or a total of three two-port SRS resources are configured in the two resource sets.

[0513] In some embodiments, the default configuration is predefined. For example, one single-port SRS resource is configured in the first SRS resource set, two single-port SRS resources are configured in the second SRS resource set, two single-port SRS resources are configured in the third SRS resource set, and one single-port SRS resource is configured in the fourth SRS resource set; or two single-port SRS resources are configured in the first SRS resource set, two single-port SRS resources are configured in the second SRS resource set, and two single-port SRS resources are configured in the third SRS resource set; or Alternatively, one 2-port SRS resource is configured in the first SRS resource set, one 2-port SRS resource is configured in the second SRS resource set, and one 2-port SRS resource is configured in the third SRS resource set; alternatively, three single-port SRS resources are configured in the first SRS resource set, and three single-port SRS resources are configured in the second SRS resource set; alternatively, two 2-port SRS resources are configured in the first SRS resource set, and one 2-port SRS resource is configured in the third SRS resource set. In some embodiments, different SRS resource sets are transmitted in different time slots, so no antenna switching transmission interval is required between the SRS resources transmitted by each SRS resource set.

[0514] In some embodiments, the SRS resource configuration configured by the base station after the terminal capability report is used for transmission. Different SRS resource sets are transmitted in different time slots, so there is no need for antenna switching transmission intervals between the SRS resources configured in each SRS resource set.

[0515] 3. For the 3T8R terminal RF architecture, the antenna switching configuration is similar to the above 3T4R. The antenna switching configuration is as follows:

[0516] Case 1: an SRS resource set is configured, and the SRS resource set type is one of a periodic SRS resource set, a semi-persistent SRS resource set, and an aperiodic SRS resource set.

[0517] Solution 1: Configure 8 single-port SRS resources.

[0518] In some embodiments, for an aperiodic SRS resource set, the terminal supports an extended configuration function and is enabled by the network configuration srs-ExtensionAperiodicSRS, which requires extending the number of aperiodic SRS resources supported in an SRS resource set.

[0519] In some embodiments, referring to the 3T8R terminal RF architecture shown in (c) and (d) of FIG3 , only two antenna switching transmission intervals, three antenna switching transmission intervals, or four antenna switching transmission intervals need to be added. Thus, compared to adding an antenna switching transmission interval between each SRS resource, the number of symbols sent can be reduced from 15 symbols to a maximum of 10 symbols, assuming that one SRS resource occupies one symbol and one antenna switching transmission interval occupies one symbol.

[0520] In some embodiments, an antenna switching transmission interval is added between each SRS resource.

[0521] In some embodiments, an antenna switching transmission interval is added at a default or predefined fixed symbol position, for example, one antenna switching transmission interval is added after the first symbol.

[0522] In some embodiments, the terminal reports to the network device to indicate the time domain location of the antenna switching transmission interval. For example, the terminal may indicate the addition of the antenna switching transmission interval after the first symbol, the addition of the antenna switching transmission interval after the third symbol, or the indication of SRS resource grouping (e.g., 3 SRS resources + 3 SRS resources + 2 SRS resources, 3 SRS resources + 3 SRS resources + 1 SRS resource + 1 SRS resource, 2 SRS resources + 2 SRS resources + 2 SRS resources, etc.), and the network device may configure the specific transmission location or pattern.

[0523] In some embodiments, the terminal reports the terminal capability to the network device, and the terminal capability may include information indicating the position of the antenna switching transmission interval in the time domain.

[0524] By using the above method, when uplink resources are tight within a time slot, uplink transmission resources can be saved.

[0525] Case 2: Configure four 2-port SRS resources.

[0526] In some embodiments, when the resource type is non-periodic, 4 SRS resource sets are configured, 8 single-port SRS resources are configured in the 4 resource sets, or 4 2-port SRS resources are configured in the 4 resource sets.

[0527] In some embodiments, when the resource type is non-periodic, three SRS resource sets are configured, and a total of eight single-port SRS resources are configured in the three resource sets.

[0528] In some embodiments, the default configuration is predefined. For example, three single-port SRS resources are configured in the first SRS resource set, three single-port SRS resources are configured in the second SRS resource set, one single-port SRS resource is configured in the third SRS resource set, and one single-port SRS resource is configured in the fourth SRS resource set; or, two single-port SRS resources are configured in the first SRS resource set, two single-port SRS resources are configured in the second SRS resource set, two single-port SRS resources are configured in the third SRS resource set, and two single-port SRS resources are configured in the fourth SRS resource set; or, three single-port SRS resources are configured in the first SRS resource set. In some embodiments, different SRS resource sets are transmitted in different time slots, so no antenna switching transmission interval is required between the SRS resources transmitted by each SRS resource set.

[0529] In some embodiments, the SRS resource configuration configured by the base station after the terminal capability report is used for transmission. Different SRS resource sets are transmitted in different time slots, so there is no need for antenna switching transmission intervals between the SRS resources configured in each SRS resource set.

[0530] In the embodiments of the present disclosure, some or all of the steps and their optional implementations may be arbitrarily combined with some or all of the steps in other embodiments, or may be arbitrarily combined with the optional implementations of other embodiments.

[0531] The embodiments of the present disclosure also provide a communication device for implementing any of the above methods. For example, the embodiments of the present disclosure also provide another communication device, including units or modules for implementing each step performed by a terminal in any of the above methods. For example, the embodiments of the present disclosure also provide another communication device, including units or modules for implementing each step performed by a network device in any of the above methods.

[0532] It should be understood that the division of the various units or modules in the above device is merely a division of logical functions. In actual implementation, they may be fully or partially integrated into a physical entity, or they may be physically separated. In addition, the units or modules in the device may 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 the memory stores instructions. The processor calls the instructions stored in the memory to implement any of the above methods or implement the functions of the various units or modules of the above device, 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 within 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-mentioned hardware circuits can be understood as one or more processors. For example, in one implementation, the above-mentioned 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 another example, in another implementation, the above-mentioned hardware circuit can be realized by a programmable logic device (PLD). Taking a field programmable gate array (FPGA) as an example, it can include a large number of logic gate circuits, and the connection relationship between the logic gate circuits is configured by configuring the configuration file, thereby realizing 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 software called by the processor, or in the form of hardware circuits, or in part by software called by the processor, and the rest by hardware circuits.

[0533] In the embodiments of the present disclosure, the processor is a circuit with signal processing capabilities. In one implementation, the processor can be a circuit with instruction reading and execution capabilities, such as a central processing unit, a microprocessor, a graphics processing unit (GPU) (which can be understood as a microprocessor), or a digital signal processor (DSP); in another implementation, the processor can implement certain functions through the logical relationship of the hardware circuit, and the logical relationship of the above-mentioned hardware circuit is fixed or reconfigurable, such as the processor is a hardware circuit implemented by a dedicated integrated circuit or a programmable logic device, such as an FPGA. In a reconfigurable hardware circuit, the process of the processor loading a configuration document and implementing the hardware circuit configuration can 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.

[0534] Figure 7A is a schematic diagram of the structure of a terminal provided according to an embodiment of the present disclosure. As shown in Figure 7A, terminal 101 may include a transceiver module 7101. In some embodiments, transceiver module 7101 may be configured to transmit SRS on N SRS resources, where the function of the SRS resources is antenna switching, and N is an integer greater than or equal to 2. In some embodiments, transceiver module 7101 may be configured to perform at least one of the communication steps such as sending and / or receiving performed by terminal 101 in any of the above methods (e.g., step S401, step S402, step S403), which will not be repeated here.

[0535] FIG7B is a schematic diagram of a structure of a network device provided according to an embodiment of the present disclosure. As shown in FIG7B , the network device 102 may include a transceiver module 7201. In some embodiments, the transceiver module 7201 may be configured to receive SRS on N SRS resources, where the function of the SRS resource is antenna switching, and N is an integer greater than or equal to 2. In some embodiments, the transceiver module 7201 may be configured to perform at least one of the communication steps (e.g., steps S401, S402, and S403) such as sending and / or receiving performed by the network device 102 in any of the above methods, which will not be repeated here.

[0536] In some embodiments, the transceiver module may include a transmitting module and / or a receiving module. The transmitting module and the receiving module may be separate or integrated. Optionally, the transceiver module may be interchangeable with the transceiver.

[0537] As shown in Figure 8A, Figure 8A is a schematic diagram of the structure of a communication device provided according to an embodiment of the present disclosure. The communication device 8100 can be a network device (such as an access network device), or a terminal (such as a user device, etc.), or a chip, chip system, or processor that supports the network device to implement any of the above methods, or a chip, chip system, or processor that supports the terminal to implement any of the above methods. The communication device 8100 can be used to implement the method described in the above method embodiment. For details, please refer to the description of the above method embodiment.

[0538] In some embodiments, the communication device 8100 includes one or more processors 8101. The processor 8101 can be a general-purpose processor or a dedicated processor, for example, a baseband processor or a central processing unit. The baseband processor can be used to process communication protocols and communication data, and the central processing unit can be used to control communication devices (such as base stations, baseband chips, terminal devices, terminal device chips, DUs or CUs, etc.), execute programs, and process program data. Optionally, the communication device 8100 is used to perform any of the above methods. Optionally, one or more processors 8101 are used to call instructions to cause the communication device 8100 to perform any of the above methods.

[0539] In some embodiments, the communication device 8100 further includes one or more transceivers 8102. When the communication device 8100 includes one or more transceivers 8102, the transceiver 8102 performs at least one of the communication steps of sending and / or receiving in the above method (e.g., step S301, but not limited thereto). In an optional embodiment, the transceiver 8102 may include a receiver and / or a transmitter, and the receiver and transmitter may be separate or integrated. Optionally, the terms transceiver, transceiver unit, transceiver, transceiver circuit, interface circuit, and interface may be interchangeable, the terms transmitter, transmitting unit, transmitter, and transmitting circuit may be interchangeable, and the terms receiver, receiving unit, receiver, and receiving circuit may be interchangeable.

[0540] In some embodiments, the communication device 8100 further includes one or more memories 8103 for storing data. Alternatively, all or part of the memories 8103 may be located outside the communication device 8100. In alternative embodiments, the communication device 8100 may include one or more interface circuits 8104. Optionally, the interface circuits 8104 are connected to the memories 8103 and may be configured to receive data from the memories 8103 or other devices, or to send data to the memories 8103 or other devices. For example, the interface circuits 8104 may read data stored in the memories 8103 and send the data to the processor 8101.

[0541] The communication device 8100 described in the above embodiments may be a network device or a terminal, but the scope of the communication device 8100 described in the present disclosure is not limited thereto, and the structure of the communication device 8100 may not be limited by FIG. 8A. 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 or 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, an in-vehicle device, a network device, a cloud device, an artificial intelligence device, etc.; (6) others, etc.

[0542] As shown in Figure 8B, Figure 8B is a schematic diagram of a structure of a chip provided according to an embodiment of the present disclosure. If the communication device 8100 can be a chip or a chip system, please refer to the schematic diagram of a structure of a chip 8200 shown in Figure 8B, but it is not limited thereto.

[0543] In some embodiments, the chip 8200 includes one or more processors 8201. The chip 8200 is configured to execute any of the above methods.

[0544] In some embodiments, chip 8200 further includes one or more interface circuits 8202. Terms such as interface circuit, interface, and transceiver pins may be used interchangeably. In some embodiments, chip 8200 further includes one or more memories 8203 for storing data. Alternatively, all or part of memory 8203 may be located external to chip 8200. Optionally, interface circuit 8202 is connected to memory 8203 and may be used to receive data from memory 8203 or other devices, or may be used to send data to memory 8203 or other devices. For example, interface circuit 8202 may read data stored in memory 8203 and send the data to processor 8201.

[0545] In some embodiments, the interface circuit 8202 performs at least one of the communication steps (e.g., step S301, but not limited thereto) of sending and / or receiving in the above method. The interface circuit 8202 performing the communication steps (e.g., sending and / or receiving) in the above method, for example, means that the interface circuit 8202 performs data exchange between the processor 8201, the chip 8200, the memory 8203, or the transceiver device.

[0546] The modules and / or devices described in various embodiments, such as virtual devices, physical devices, and chips, can be arbitrarily combined or separated according to circumstances. Optionally, some or all steps can also be performed collaboratively by multiple modules and / or devices, which is not limited here.

[0547] The embodiments of the present disclosure further provide a storage medium having instructions stored thereon. When the instructions are executed on the communication device 8100, the communication device 8100 executes any of the above methods. Optionally, the storage medium is an electronic storage medium. Optionally, the storage medium is a computer-readable storage medium, but is not limited thereto and may also be a storage medium readable by other devices. Optionally, the storage medium may be a non-transitory storage medium, but is not limited thereto and may also be a temporary storage medium.

[0548] The embodiment of the present disclosure further provides a program product, which, when executed by the communication device 8100, enables the communication device 8100 to perform any of the above methods. Optionally, the program product is a computer program product.

[0549] The embodiments of the present disclosure further provide a computer program, which, when executed on a computer, enables the computer to execute any of the above methods.

[0550] Other embodiments of the present invention will readily occur to those skilled in the art after considering the specification and practicing the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the invention that follow from the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the invention being indicated by the following claims.

[0551] It should be understood that the present invention is not limited to the exact construction 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

1. A communication method for a terminal with 3 transmit antennas, comprising: Transmitting SRS on N sounding reference signal (SRS) resources, where the function of the SRS resources is antenna switching, and N is an integer greater than or equal to 2.

2. The method according to claim 1, wherein, The terminal further comprises Y receive antennas, where Y is an integer greater than 3.

3. The method according to claim 1 or 2, wherein The antenna switching configuration of the terminal includes one of the following: 3 transmit antennas and 4 receive antennas; 3 transmit antennas and 6 receive antennas; 3 transmit antennas and 8 receive antennas.

4. The method according to any one of claims 1 to 3, wherein, Each of the N SRS resources includes at least one of the following: Single-port SRS resource; Dual-port SRS resource.

5. The method according to claim 4, wherein, When the terminal has 4 receive antennas, the N SRS resources include 4 single-port SRS resources or 2 dual-port SRS resources.

6. The method according to claim 4, wherein When the terminal has 6 receive antennas, the N SRS resources include 6 single-port SRS resources or 3 dual-port SRS resources.

7. The method according to claim 4, wherein When the terminal has 8 receive antennas, the N SRS resources include 8 single-port SRS resources or 4 dual-port SRS resources.

8. The method according to any one of claims 1 to 7, wherein The N SRS resources belong to an SRS resource set.

9. The method according to claim 8, wherein An antenna switching transmission interval is added between the last symbol of the i-th SRS resource and the first symbol of the (i + 1)-th SRS resource among the N SRS resources. The i-th SRS resource is adjacent to the (i + 1)-th SRS resource, and i is a positive integer less than or equal to N - 1.

10. The method according to claim 8, wherein, When there are X switches among the Y receive antennas, 1 antenna switching transmission interval is added between the last symbol of the nj SRS resources before the j-th switch and the first symbol of the nj+1 SRS resources after the j-th switch among the X switches, where X is a positive integer, nj and nj+1 are positive integers less than or equal to 3, and j is a positive integer less than or equal to X - 1.

11. The method according to claim 9 or 10, wherein The time domain offset of the antenna switching transmission interval relative to the first SRS resource among the N SRS resources is pre-configured or configured by a network device.

12. The method according to claim 11, wherein, When the time domain offset is configured by the network device, the method further comprises: Transmitting first information, where the first information is used to indicate to the network device the time domain offset supported by the terminal.

13. The method according to claim 9 or 10, wherein The method further comprises: Transmitting second information, where the second information is used to indicate the time domain offset of the antenna switching transmission interval determined by the terminal relative to the first SRS resource among the N SRS resources.

14. The method according to any one of claims 8 to 13, wherein, The type of the SRS resource set is one of the following: Periodic SRS resource set; Semi-persistent SRS resource set; Aperiodic SRS resource set.

15. The method according to claim 14, wherein, The aperiodic SRS resource set supports an extended number of SRS resource sets.

16. The method according to claim 15, wherein, The number of SRS resource sets is 2.

17. The method according to any one of claims 1 to 4, wherein The N SRS resources are aperiodic SRS resources, and the N SRS resources belong to multiple SRS resource sets.

18. The method according to claim 17, wherein Among the N SRS resources, the SRS resources configured to be transmitted at the same time domain position belong to the same SRS resource set, and the SRS resources configured to be transmitted at different time domain positions belong to different SRS resource sets.

19. The method according to claim 17 or 18, wherein The multiple SRS resource sets are configured by a network device to be transmitted in different time slots.

20. The method according to claim 17, wherein The multiple SRS resource sets are configured by a network device to be transmitted in the same time slot, and an antenna switching transmission interval is added between the last symbol of the last SRS resource in the k-th SRS resource set among the multiple SRS resource sets and the first symbol of the first SRS resource in the (k + 1)-th SRS resource set. The k-th SRS resource set is adjacent to the (k + 1)-th SRS resource set, and k is a positive integer.

21. A communication method for a terminal with 3 transmit antennas, including: Receiving SRS on N sounding reference signal SRS resources, where the function of the SRS is antenna switching, and N is an integer greater than or equal to 2.

22. The method according to claim 21, wherein The terminal further includes Y receive antennas, and Y is an integer greater than 3.

23. The method according to claim 21 or 22, wherein, The antenna switching configuration of the terminal includes one of the following: 3 transmit antennas and 4 receive antennas; 3 transmit antennas and 6 receive antennas; 3 transmit antennas and 8 receive antennas.

24. The method according to any one of claims 21 to 23, wherein, Each of the N SRS resources includes at least one of the following: Single-port SRS resource; Two-port SRS resource.

25. The method according to claim 24, wherein, When the terminal has 4 receive antennas, the N SRS resources include 4 single-port SRS resources or 2 two-port SRS resources.

26. The method according to claim 24, wherein, When the terminal has 6 receive antennas, the N SRS resources include 6 single-port SRS resources or 3 two-port SRS resources.

27. The method according to claim 24, wherein, When the terminal has 8 receive antennas, the N SRS resources include 8 single-port SRS resources or 4 two-port SRS resources.

28. The method according to any one of claims 21 to 27, wherein The N SRS resources belong to one SRS resource set.

29. The method according to claim 28, wherein, An antenna switching transmission interval is added between the last symbol of the i-th SRS resource and the first symbol of the (i + 1)-th SRS resource among the N SRS resources. The i-th SRS resource is adjacent to the (i + 1)-th SRS resource, and i is a positive integer less than or equal to N - 1.

30. The method according to claim 28, wherein, When there are X switches in the Y receive antennas, one antenna switching transmission interval is added between the last symbol of the nj SRS resources before the j-th switch among the X switches and the first symbol of the nj+1 SRS resources after the j-th switch, where X is a positive integer, nj and nj+1 are positive integers less than or equal to 3, and j is a positive integer less than or equal to X - 1.

31. The method according to claim 29 or 30, wherein, The time domain offset of the antenna switching transmission interval relative to the first SRS resource among the N SRS resources is pre-configured or configured by a network device.

32. The method according to claim 11, wherein When the time domain offset is configured by a network device, the method further includes: Receiving first information, where the first information is used to indicate the time domain offset supported by the terminal.

33. The method according to claim 29 or 30, wherein, The method further includes: Receiving second information, where the second information is used to indicate the time domain offset of the antenna switching transmission interval determined by the terminal relative to the first SRS resource among the N SRS resources.

34. The method according to any one of claims 28 to 33, wherein, The SRS resource set type is one of the following: Periodic SRS resource set; Semi-persistent SRS resource set; Aperiodic SRS resource set.

35. The method according to claim 34, wherein The aperiodic SRS resource set supports expanding the number of SRS resource sets.

36. The method according to claim 35, wherein, The number of SRS resource sets is 2.

37. The method according to any one of claims 21 to 34, wherein The N SRS resources are aperiodic SRS resources, and the N SRS resources belong to multiple SRS resource sets.

38. The method according to claim 37, wherein, Among the N SRS resources, the SRS resources transmitted at the same time domain position are configured in the same SRS resource set, and the SRS resources transmitted at different time domain positions are configured in different SRS resource sets.

39. The method according to claim 37 or 38, wherein The multiple SRS resource sets are configured by the network device to be transmitted in different time slots.

40. The method according to claim 37, wherein, The multiple SRS resource sets are configured by the network device to be transmitted in the same time slot, and an antenna switching transmission interval is added between the last symbol of the last SRS resource in the k-th SRS resource set and the first symbol of the first SRS resource in the (k + 1)-th SRS resource set. The k-th SRS resource set is adjacent to the (k + 1)-th SRS resource set, and k is a positive integer.

41. A terminal, comprising: A transceiver module, configured to transmit SRS on N sounding reference signal SRS resources, where the function of the SRS is antenna switching, and N is an integer greater than or equal to 2.

42. A network device, comprising: A transceiver module, configured to receive SRS on N sounding reference signal SRS resources, where the function of the SRS is antenna switching, and N is an integer greater than or equal to 2.

43. A terminal, comprising: At least one processor; A memory storing instructions; Wherein, when the instructions are executed by the terminal, the terminal implements the method according to any one of claims 1 to 20.

44. A network device, comprising: At least one processor; A memory storing instructions; Wherein, when the instructions are executed by the network device, the network device implements the method according to any one of claims 21 to 40.

45. A communication system, comprising: A terminal, configured to implement the method according to any one of claims 1 to 20; A network device, configured to implement the method according to any one of claims 21 to 40.

46. A storage medium storing instructions, wherein, When the instructions run on the communication device, the communication device is caused to execute the method according to any one of claims 1 to 40.

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