Method and apparatus for transmitting sounding reference signal, and method and apparatus for receiving sounding reference signal

Abstract

Embodiments of the present application provide a method and apparatus for transmitting a sounding reference signal (SRS), and a method and apparatus for receiving an SRS. The method for transmitting an SRS comprises: a terminal device receives configuration information from a network device, wherein the configuration information is used for configuring the terminal device to perform three-port SRS transmission; and the terminal device uses three ports to transmit an SRS on the basis of the configuration information.

Description

Method and device for transmitting and receiving sounding reference signal Technical Field

[0001] The embodiments of the present application relate to the field of communication technologies. Background Art

[0002] In New Radio (NR) systems, codebook-based uplink transmissions, such as Physical Uplink Shared Channel (PUSCH) transmissions, are supported. PUSCH transmissions can use a single port, two ports, four ports, or eight ports. To support codebook-based transmissions, the Sounding Reference Signal (SRS) is also configured with a single port, two ports, four ports, or eight ports.

[0003] It should be noted that the above introduction to the technical background is merely intended to provide a clear and complete description of the technical solutions of this application and facilitate understanding by those skilled in the art. Simply because these solutions are described in the background technology section of this application, it should not be assumed that the above technical solutions are well known to those skilled in the art.

[0004] Summary of the Invention

[0005] The inventors have discovered that the current codebook-based uplink transmission does not support UEs with 3 Tx, that is, does not support 3-port SRS transmission. Currently, there is no clear solution for 3-port SRS transmission.

[0006] To address at least one of the above problems, embodiments of the present application provide a method and apparatus for sending and receiving a sounding reference signal.

[0007] According to one aspect of an embodiment of the present application, a method for sending a sounding reference signal is provided, including:

[0008] The terminal device receives configuration information from the network device; wherein the configuration information is used to configure the terminal device to perform 3-port SRS transmission; and

[0009] The terminal device uses 3 ports to send SRS according to the configuration information.

[0010] According to another aspect of an embodiment of the present application, a device for transmitting a sounding reference signal is provided, including:

[0011] a receiving unit configured to receive configuration information from a network device; wherein the configuration information is used to configure the terminal device to perform 3-port SRS transmission; and

[0012] A sending unit is configured to send an SRS using three ports according to the configuration information.

[0013] According to another aspect of an embodiment of the present application, a method for receiving a sounding reference signal is provided, including:

[0014] The network device sends configuration information to the terminal device; wherein the configuration information is used to configure the terminal device to perform 3-port SRS transmission; and

[0015] The network device receives the SRS sent by the terminal device using port 3.

[0016] According to another aspect of an embodiment of the present application, a device for receiving a sounding reference signal is provided, including:

[0017] a sending unit, which sends configuration information to a terminal device; wherein the configuration information is used to configure the terminal device to perform 3-port SRS transmission; and

[0018] A receiving unit receives the SRS sent by the terminal device using port 3.

[0019] According to another aspect of an embodiment of the present application, a communication system is provided, including:

[0020] A network device that sends configuration information to a terminal device; wherein the configuration information is used to configure the terminal device to perform 3-port SRS transmission; and

[0021] The terminal device uses 3 ports to send SRS according to the configuration information.

[0022] One of the beneficial effects of the embodiments of the present application is that: the terminal device receives configuration information from the network device; wherein the configuration information is used to configure the terminal device to perform 3-port SRS transmission; and uses 3 ports to send SRS according to the configuration information; thereby, the performance and efficiency of SRS transmission can be improved.

[0023] With reference to the following description and accompanying drawings, specific embodiments of the present application are disclosed in detail, indicating the manner in which the principles of the present application can be employed. It should be understood that the embodiments of the present application are not limited in scope. Within the spirit and scope of the appended claims, the embodiments of the present application include many variations, modifications and equivalents.

[0024] Features described and / or illustrated with respect to one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments.

[0025] It should be emphasized that the term "include / comprising" when used herein refers to the presence of features, integers, steps or components, but does not exclude the presence or addition of one or more other features, integers, steps or components. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The elements and features described in one figure or one embodiment of the present application can be combined with the elements and features shown in one or more other figures or embodiments. In addition, in the accompanying drawings, similar reference numerals represent corresponding parts in several figures and can be used to indicate corresponding parts used in more than one embodiment.

[0027] FIG1 is a schematic diagram of a communication system according to an embodiment of the present application;

[0028] FIG2 is a schematic diagram of a method for sending a sounding reference signal according to an embodiment of the present application;

[0029] FIG3 is an exemplary diagram of 3T6R operation according to an embodiment of the present application;

[0030] FIG4 is a schematic diagram of a method for receiving a sounding reference signal according to an embodiment of the present application;

[0031] FIG5 is a schematic diagram of a device for sending a sounding reference signal according to an embodiment of the present application;

[0032] FIG6 is a schematic diagram of a device for receiving a sounding reference signal according to an embodiment of the present application;

[0033] FIG7 is a schematic diagram of a terminal device according to an embodiment of the present application;

[0034] FIG8 is a schematic diagram of a network device according to an embodiment of the present application. DETAILED DESCRIPTION

[0035] The above and other features of the present application will become apparent through the following description with reference to the accompanying drawings. In the description and the accompanying drawings, specific embodiments of the present application are disclosed in detail, which illustrate some embodiments in which the principles of the present application can be adopted. It should be understood that the present application is not limited to the described embodiments. On the contrary, the present application includes all modifications, variations and equivalents that fall within the scope of the appended claims.

[0036] In the embodiments of the present application, the terms "first", "second", etc. are used to distinguish different elements from the name, but do not indicate the spatial arrangement or temporal order of these elements, and these elements should not be limited by these terms. The term "and / or" includes any one and all combinations of one or more of the associated listed terms. The terms "comprising", "including", "having", etc. refer to the presence of the stated features, elements, components or components, but do not exclude the presence or addition of one or more other features, elements, components or components.

[0037] In the embodiments of this application, the singular forms "a," "the," etc. include plural forms and should be broadly understood to mean "a" or "a type" rather than being limited to "one." Furthermore, the term "said" should be understood to include both singular and plural forms, unless the context clearly indicates otherwise. Furthermore, the term "according to" should be understood to mean "at least in part based on...", and the term "based on" should be understood to mean "at least in part based on...", unless the context clearly indicates otherwise.

[0038] In the embodiments of the present application, the term "communication network" or "wireless communication network" may refer to a network that complies with any of the following communication standards, such as Long Term Evolution (LTE), enhanced Long Term Evolution (LTE-A, LTE-Advanced), Wideband Code Division Multiple Access (WCDMA), High-Speed ​​Packet Access (HSPA), etc.

[0039] Furthermore, communication between devices in the communication system may be carried out according to communication protocols of any stage, for example, including but not limited to the following communication protocols: 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G and 5G, New Radio (NR), future 6G, etc., and / or other currently known or future developed communication protocols.

[0040] In the embodiments of the present application, the term "network device" refers to, for example, a device in a communication system that connects a terminal device to the communication network and provides services to the terminal device. Network devices may include, but are not limited to, the following devices: base station (BS), access point (AP), transmission reception point (TRP), broadcast transmitter, mobile management entity (MME), gateway, server, radio network controller (RNC), base station controller (BSC), etc.

[0041] Among them, base stations may include but are not limited to: NodeB (NodeB or NB), evolved NodeB (eNodeB or eNB) and 5G base station (gNB), IAB host, etc., and may also include remote radio head (RRH, Remote Radio Head), remote radio unit (RRU, Remote Radio Unit), relay (relay) or low-power node (such as femeto, pico, etc.). The term "base station" can include some or all of their functions. Each base station can provide communication coverage for a specific geographical area. The term "cell" can refer to a base station and / or its coverage area, depending on the context in which the term is used.

[0042] In the embodiments of the present application, the term "user equipment" (UE) or "terminal equipment" (TE) refers to, for example, a device that accesses a communication network through a network device and receives network services. A terminal device can be fixed or mobile and may also be referred to as a mobile station (MS), a terminal, a subscriber station (SS), an access terminal (AT), a station, and so on.

[0043] Among them, terminal devices may include but are not limited to the following devices: cellular phones, personal digital assistants (PDAs), wireless modems, wireless communication devices, handheld devices, machine-type communication devices, laptop computers, cordless phones, smart phones, smart watches, digital cameras, etc.

[0044] For another example, in scenarios such as the Internet of Things (IoT), the terminal device can also be a machine or device for monitoring or measurement, including but not limited to: machine type communication (MTC) terminal, vehicle-mounted communication terminal, device-to-device (D2D) terminal, machine-to-machine (M2M) terminal, and so on.

[0045] In addition, the term "network side" or "network device side" refers to one side of the network, which can be a base station or one or more network devices as described above. The term "user side" or "terminal side" or "terminal device side" refers to the user or terminal side, which can be a UE or one or more terminal devices as described above. Unless otherwise specified herein, "device" can refer to either network equipment or terminal equipment.

[0046] The following describes the scenarios of the embodiments of the present application through examples, but the present application is not limited thereto.

[0047] FIG1 is a schematic diagram of a communication system according to an embodiment of the present application, schematically illustrating a situation using a terminal device and a network device as an example. As shown in FIG1 , a communication system 100 may include a network device 101 and terminal devices 102 and 103. For simplicity, FIG1 illustrates only two terminal devices and one network device as an example, but the embodiments of the present application are not limited thereto.

[0048] In the embodiment of the present application, existing services or future services can be transmitted between the network device 101 and the terminal devices 102 and 103. For example, these services may include but are not limited to: enhanced mobile broadband (eMBB), massive machine type communication (mMTC), and ultra-reliable and low-latency communication (URLLC), etc.

[0049] It is worth noting that FIG1 shows that both terminal devices 102 and 103 are within the coverage range of network device 101, but the present application is not limited thereto. Both terminal devices 102 and 103 may not be within the coverage range of network device 101, or one terminal device 102 may be within the coverage range of network device 101 while the other terminal device 103 is outside the coverage range of network device 101.

[0050] In the embodiments of the present application, the high-layer signaling may be, for example, radio resource control (RRC) signaling; for example, an RRC message, including, for example, an MIB, system information, or a dedicated RRC message; or an RRC information element (RRC IE). The high-layer signaling may also be, for example, MAC (Medium Access Control) signaling; or a MAC control element (MAC CE). However, the present application is not limited thereto.

[0051] In the following description, to avoid confusion, the terms "PUCCH" and "physical uplink control channel" or "uplink control information" are interchangeable, and the terms "PUSCH" and "physical uplink data channel" or "uplink data" are also interchangeable. Furthermore, transmitting or receiving the PUSCH can be understood as transmitting or receiving uplink data carried by the PUSCH. Furthermore, the terms "transmit" and "send" are interchangeable.

[0052] Embodiments of the first aspect

[0053] An embodiment of the present application provides a method for sending a sounding reference signal, which is described from the perspective of a terminal device.

[0054] FIG2 is a schematic diagram of a method for sending a sounding reference signal according to an embodiment of the present application. As shown in FIG2 , the method includes:

[0055] 201. A terminal device receives configuration information from a network device; wherein the configuration information is used to configure the terminal device to perform 3-port SRS transmission; and

[0056] 202. The terminal device sends SRS using port 3 according to the configuration information.

[0057] It is worth noting that FIG2 above is merely a schematic illustration of an embodiment of the present application, and the present application is not limited thereto. For example, the execution order of the various operations may be appropriately adjusted, and other operations may be added or some operations may be reduced. Those skilled in the art may make appropriate modifications based on the above description, and are not limited to the description of FIG2 above.

[0058] In some embodiments, a 4-port sounding reference signal (SRS) resource is reused; and one port in the 4-port SRS resource is not used for 3-port transmission, and the SRS transmission power is equally split among the three ports in the 4-port SRS resource used for the 3-port transmission.

[0059] For example, for a UE with 3 Tx, SRS resources with 4 ports are reused, and one port is not used for the 3-port transmission (e.g., skipped). Which port is not used for the 3-port transmission can be configured and / or indicated by the network device. The SRS transmit power is evenly distributed across the 3 used ports.

[0060] In some embodiments, 2-port SRS resources and single-port SRS resources are bundled for 3-port transmission. The bundled SRS resources are located in the same OFDM symbol, and the SRS transmission power is evenly divided among the three ports used for the 3-port transmission in the bundled SRS resources.

[0061] For example, for a UE with 3Tx, if a 3-port SRS operation is via a bundled SRS resource, including one 2-port SRS resource and one 1-port SRS resource, the transmission power distribution between the SRS ports should be defined. For example, if the bundled SRS resources are on the same OFDM symbol, the transmission power for SRS is equally distributed across the three SRS ports of the bundled SRS source.

[0062] In some embodiments, a 2-port SRS resource and a single-port SRS resource are bundled for 3-port transmission, and the bundled SRS resources are located in different OFDM symbols, then the SRS transmission power is evenly divided among the three ports used for the 3-port transmission in the bundled SRS resource.

[0063] For example, if the bundled SRS resources are on different OFDM symbols, the transmission power for SRS should be equally distributed on the three SRS ports of the bundled SRS source.

[0064] In some embodiments, a 2-port SRS resource and a single-port SRS resource are bundled for 3-port transmission, and the bundled SRS resources are located in different OFDM symbols. Then, the SRS transmit power is the same on the three ports used for the 3-port transmission and the power of each port is determined by the 2-port SRS resource.

[0065] For example, if the bundled SRS resources are on different OFDM symbols, the transmission power of the SRS on the three SRS ports of the bundled SRS resource should be equal, and the power of each port is determined by equally allocating the transmission power on the two antenna ports, that is, the power of each port is determined by the 2-port SRS resource. For another example, the transmission power of the SRS on the three SRS ports of the bundled SRS resource should be equal, and the power of each port is determined by the single-port SRS resource.

[0066] In some embodiments, a 2-port SRS resource and a single-port SRS resource are bundled for 3-port transmission. The bundled SRS resources are located in different OFDM symbols, and the SRS transmission power is determined according to the respective OFDM symbols.

[0067] For example, if the bundled SRS resources are on different OFDM symbols, the transmission power can be determined on a symbol-by-symbol basis. In an OFDM symbol carrying a two-port SRS resource, the SRS transmission power is equally distributed across both antenna ports. In an OFDM symbol carrying a single-port SRS resource, the SRS transmission power is distributed across a single antenna port, i.e., it is not split.

[0068] In some embodiments, three single-port SRS resources are bundled for 3-port transmission, and the bundled SRS resources are located in the same OFDM symbol, and the SRS transmission power is evenly divided among the three ports used for the 3-port transmission in the bundled SRS resources.

[0069] For example, for a UE with 3Tx, if a 3-port SRS operation is performed via a bundled SRS resource, including three single-port SRS resources, the transmission power distribution between the SRS ports should be defined. For example, if the bundled SRS resources are on the same OFDM symbol, the transmission power for SRS is equally distributed across the three SRS ports of the bundled SRS resource.

[0070] In some embodiments, three single-port SRS resources are bundled for 3-port transmission, and the bundled SRS resources are located in different OFDM symbols, and the SRS transmission power is evenly divided among the three ports in the bundled SRS resources used for the 3-port transmission.

[0071] For example, if the bundled SRS resources are on different OFDM symbols, the transmission power for the SRS is equally distributed across the three SRS ports on the bundled SRS source.

[0072] In some embodiments, three single-port SRS resources are bundled for 3-port transmission. The bundled SRS resources are located in different OFDM symbols, and the SRS transmission power is determined according to the respective OFDM symbols.

[0073] For example, if the bundled SRS resources are on different OFDM symbols, the transmit power may be determined symbol by symbol. The transmit power of the SRS on different symbols may be the same, or the transmit power of the SRS on different symbols may be different.

[0074] The SRS power control has been described above. The SRS antenna switching will be described below.

[0075] In some embodiments, at least one of the following configurations is supported for SRS antenna switching operation: 3Tx3Rx (3T3R), 3Tx4Rx (3T4R), 3Tx6Rx (3T6R), 3Tx8Rx (3T8R).

[0076] In some embodiments, a 4-port SRS resource is configured, and one port of the 4-port SRS resource is not used for 3-port transmission, and the SRS resource configuration is predefined for SRS antenna switching of 3Tx.

[0077] For example, in the SRS resource configuration, for 3Tx3Rx, a 4-port SRS resource is configured and one port is skipped; for 3Tx4Rx, two 4-port SRS resources are configured and one port in each SRS resource is skipped, or, a 4-port SRS resource and a single-port SRS resource are configured and one port of the 4-port SRS resource is skipped; for 3Tx6Rx, two 4-port SRS resources are configured and one port in each SRS resource is skipped; for 3Tx8Rx, three 4-port SRS resources are configured and one port in each SRS resource is skipped, or, two 4-port SRS resources and a single-port SRS resource are configured and one port of the 4-port SRS resource is skipped.

[0078] Table 1 shows an example of SRS configuration for 3Tx antenna switching. For example, for a UE with 3Tx, if 4-port SRS resources are configured and one port is skipped for transmission, the example of SRS resource configuration shown in Table 1 can be applied to SRS antenna switching with 3Tx.

[0079] Table 1 SRS configuration for 3Tx antenna switching

[0080] (SRS configuration for antenna switching with 3Tx)

[0081] In some embodiments, SRS resources are bundled for 3-port transmission through time division multiplexing (TDM), and SRS resource configuration is predefined for SRS antenna switching for 3Tx.

[0082] For example, in the SRS resource configuration, for 3Tx3Rx, one 2-port SRS resource and one single-port SRS resource are configured; for 3Tx4Rx, two 2-port SRS resources and two single-port SRS resources are configured, or one 2-port SRS resource and two single-port SRS resources are configured; for 3Tx6Rx, two 2-port SRS resources and two single-port SRS resources are configured; for 3Tx8Rx, three 2-port SRS resources and three single-port SRS resources are configured, or two 2-port SRS resources, two single-port SRS resources and another 2-port SRS resource are configured.

[0083] Table 2 shows an example of an SRS configuration for 3Tx antenna switching. For example, for a UE with 3Tx, if a 3-port SRS operation is via SRS resources bundled in a TDM manner (e.g., a 2-port SRS resource plus a single-port SRS resource on different OFDM symbols), then an example of an SRS resource configuration as shown in Table 2 can be applied to SRS antenna switching when having 3Tx.

[0084] Table 2 SRS configuration for 3Tx antenna switching by TDM bundling SRS resources

[0085] (SRS configuration for antenna switching with 3Tx via bundled SRS resource in TDMed manner)

[0086] In some embodiments, bundled SRS resources for 3-port transmission are treated as a group; within the group, the SRS resources are located on two consecutive OFDM symbols, and a gap symbol is configured between two groups.

[0087] Figure 3 illustrates an example of 3T6R operation in an embodiment of the present application. As shown in Figure 3, bundled SRS resources for 3-port transmission can be defined as a group, i.e., a 2-port SRS resource plus a single-port SRS resource constitute a group. Within a group, the 2-port SRS resource and the single-port SRS resource are located on two consecutive OFDM symbols, i.e., without gap symbols. A gap symbol is configured between the two groups.

[0088] In some embodiments, SRS resources are bundled for 3-port transmission through frequency division multiplexing (FDM), or the bundled SRS resources occupy the same resource elements (REs) through different cyclic shifts on the same OFDM symbol, and the SRS resource configuration is predefined for 3Tx SRS antenna switching.

[0089] For example, in the SRS resource configuration, for 3Tx3Rx, one 2-port SRS resource and one single-port SRS resource are configured; for 3Tx4Rx, two 2-port SRS resources and two single-port SRS resources are configured, or one 2-port SRS resource and two single-port SRS resources are configured; for 3Tx6Rx, two 2-port SRS resources and two single-port SRS resources are configured; for 3Tx8Rx, three 2-port SRS resources and three single-port SRS resources are configured, or two 2-port SRS resources and two single-port SRS resources and another 2-port SRS resource are configured.

[0090] Table 2 shows an example of an SRS configuration for 3Tx antenna switching. For example, for a UE with 3Tx, if a 3-port SRS operation is performed in an FDM manner via bundled SRS resources (e.g., one 2-port SRS resource plus one single-port SRS resource at a comb offset in the same OFDM symbol), or if the bundled SRS resources occupy the same RE via different cyclic shifts in the same OFDM symbol, then an example of an SRS resource configuration as shown in Table 3 can be applied to SRS antenna switching with 3Tx.

[0091] Table 3 SRS configuration for 3Tx antenna switching by bundling SRS resources

[0092] (SRS configuration for antenna switching with 3Tx via bundled SRS resource)

[0093] In some embodiments, bundled SRS resources for 3-port transmission are grouped as one group; the SRS resources within the group are located on the same OFDM symbol, and a gap symbol is configured between two groups.

[0094] For example, bundled SRS resources for 3-port transmission can be defined as a group, e.g., a 2-port SRS resource plus a 1-port SRS resource is a group. Within a group, the 2-port SRS resource and the 1-port SRS resource are on the same OFDM symbol. A gap symbol is configured between the two groups.

[0095] In the embodiment of the present application, SRS transmit power allocation is defined for a 3-port SRS, and SRS antenna switching considering a 3Tx UE is also defined.

[0096] The above embodiments are merely exemplary of the present invention, but the present invention is not limited thereto. Appropriate modifications may be made based on the above embodiments. For example, the above embodiments may be used alone, or one or more of the above embodiments may be combined.

[0097] It can be seen from the above embodiment that the terminal device receives configuration information from the network device; wherein the configuration information is used to configure the terminal device to perform 3-port SRS transmission; and uses 3 ports to send SRS according to the configuration information; thereby, the performance and efficiency of SRS transmission can be improved.

[0098] Embodiments of the second aspect

[0099] The embodiment of the present application provides a method for receiving a sounding reference signal, which is described from the perspective of a network device. The embodiment of the second aspect can be combined with the embodiment of the first aspect, and the same contents as the embodiment of the first aspect will not be repeated.

[0100] FIG4 is another schematic diagram of a method for receiving a sounding reference signal according to an embodiment of the present application. As shown in FIG4 , the method includes:

[0101] 401, a network device sends configuration information to a terminal device; wherein the configuration information is used to configure the terminal device to perform 3-port SRS transmission; and

[0102] 402. The network device receives the SRS sent by the terminal device using port 3.

[0103] The above embodiments are merely exemplary of the present invention, but the present invention is not limited thereto. Appropriate modifications may be made based on the above embodiments. For example, the above embodiments may be used alone, or one or more of the above embodiments may be combined.

[0104] It can be seen from the above embodiment that the terminal device receives configuration information from the network device; wherein the configuration information is used to configure the terminal device to perform 3-port SRS transmission; and uses 3 ports to send SRS according to the configuration information; thereby, the performance and efficiency of SRS transmission can be improved.

[0105] Embodiments of the third aspect

[0106] The embodiment of the present application provides a device for transmitting a sounding reference signal. The device may be, for example, a terminal device, or one or more components or assemblies configured in the terminal device. The contents that are the same as those in the first and second aspects of the embodiment are not repeated here.

[0107] FIG5 is a schematic diagram of a device for transmitting a sounding reference signal according to an embodiment of the present application. As shown in FIG5 , the device 500 for transmitting a sounding reference signal according to an embodiment of the present application includes:

[0108] A receiving unit 501 receives configuration information from a network device; wherein the configuration information is used to configure the terminal device to perform 3-port SRS transmission; and

[0109] The sending unit 502 sends the SRS using three ports according to the configuration information.

[0110] In some embodiments, a 4-port SRS resource is configured, and one port in the 4-port SRS resource is not used for 3-port transmission, and SRS transmission power is evenly divided among the three ports in the 4-port SRS resource used for the 3-port transmission.

[0111] In some embodiments, 2-port SRS resources and single-port SRS resources are bundled for 3-port transmission. The bundled SRS resources are located in the same OFDM symbol, and the SRS transmission power is evenly divided among the three ports used for the 3-port transmission in the bundled SRS resources.

[0112] In some embodiments, 2-port SRS resources and single-port SRS resources are bundled for 3-port transmission, and the bundled SRS resources are located in different OFDM symbols. Then, the SRS transmission power is evenly divided among the three ports used for the 3-port transmission in the bundled SRS resources, or, the SRS transmission power is the same on the three ports used for the 3-port transmission and the power of each port is determined by the 2-port SRS resources, or, the SRS transmission power is determined according to their respective OFDM symbols.

[0113] In some embodiments, three single-port SRS resources are bundled for 3-port transmission, and the bundled SRS resources are located in the same OFDM symbol, and the SRS transmission power is evenly divided among the three ports used for the 3-port transmission in the bundled SRS resources.

[0114] In some embodiments, three single-port SRS resources are bundled for 3-port transmission, and the bundled SRS resources are located in different OFDM symbols. The SRS transmission power is then evenly divided among the three ports in the bundled SRS resources used for the 3-port transmission, or the SRS transmission power is determined according to their respective OFDM symbols.

[0115] In some embodiments, at least one of the following configurations is supported for SRS antenna switching operation: 3Tx3Rx, 3Tx4Rx, 3Tx6Rx, 3Tx8Rx.

[0116] In some embodiments, a 4-port SRS resource is configured, and one port of the 4-port SRS resource is not used for 3-port transmission, and the SRS resource configuration is predefined for SRS antenna switching of 3Tx.

[0117] In some embodiments, in the SRS resource configuration,

[0118] For 3Tx3Rx, a 4-port SRS resource is configured and one port is skipped;

[0119] For 3Tx4Rx, two 4-port SRS resources are configured and one port in each SRS resource is skipped, or one 4-port SRS resource and one single-port SRS resource are configured and one port of the 4-port SRS resource is skipped;

[0120] For 3Tx6Rx, two 4-port SRS resources are configured and one port in each SRS resource is skipped;

[0121] For 3Tx8Rx, three 4-port SRS resources are configured and one port in each SRS resource is skipped, or two 4-port SRS resources and one single-port SRS resource are configured and one port of the 4-port SRS resources is skipped.

[0122] In some embodiments, SRS resources are bundled for 3-port transmission through time division multiplexing (TDM), and SRS resource configuration is predefined for SRS antenna switching for 3Tx.

[0123] In some embodiments, in the SRS resource configuration,

[0124] For 3Tx3Rx, configure a 2-port SRS resource and a single-port SRS resource;

[0125] For 3Tx4Rx, configure two 2-port SRS resources and two single-port SRS resources, or configure one 2-port SRS resource and two single-port SRS resources;

[0126] For 3Tx6Rx, configure two 2-port SRS resources and two single-port SRS resources;

[0127] For 3Tx8Rx, three 2-port SRS resources and three single-port SRS resources are configured, or two 2-port SRS resources, two single-port SRS resources, and another 2-port SRS resource are configured.

[0128] In some embodiments, bundled SRS resources for 3-port transmission are treated as a group; within the group, the SRS resources are located on two consecutive OFDM symbols, and a gap symbol is configured between two groups.

[0129] In some embodiments, SRS resources are bundled for 3-port transmission through frequency division multiplexing (FDM), or the bundled SRS resources occupy the same resource elements (REs) through different cyclic shifts on the same OFDM symbol, and the SRS resource configuration is predefined for 3Tx SRS antenna switching.

[0130] In some embodiments, in the SRS resource configuration,

[0131] For 3Tx3Rx, configure a 2-port SRS resource and a single-port SRS resource;

[0132] For 3Tx4Rx, configure two 2-port SRS resources and two single-port SRS resources, or configure one 2-port SRS resource and two single-port SRS resources;

[0133] For 3Tx6Rx, configure two 2-port SRS resources and two single-port SRS resources;

[0134] For 3Tx8Rx, three 2-port SRS resources and three single-port SRS resources are configured, or two 2-port SRS resources, two single-port SRS resources, and another 2-port SRS resource are configured.

[0135] In some embodiments, bundled SRS resources for 3-port transmission are grouped as one group; the SRS resources within the group are located on the same OFDM symbol, and a gap symbol is configured between two groups.

[0136] The above embodiments are merely exemplary of the present invention, but the present invention is not limited thereto. Appropriate modifications may be made based on the above embodiments. For example, the above embodiments may be used alone, or one or more of the above embodiments may be combined.

[0137] It is worth noting that the above only describes the components or modules related to the present application, but the present application is not limited thereto. The apparatus 500 for transmitting a sounding reference signal may further include other components or modules. For details of these components or modules, reference may be made to related technologies.

[0138] In addition, for simplicity, FIG5 only illustrates the connection relationship or signal path between various components or modules. However, those skilled in the art should be aware that various related technologies such as bus connection can be used. The above-mentioned components or modules can be implemented by hardware facilities such as processors, memories, transmitters, and receivers; this application is not limited to this.

[0139] It can be seen from the above embodiment that the terminal device receives configuration information from the network device; wherein the configuration information is used to configure the terminal device to perform 3-port SRS transmission; and uses 3 ports to send SRS according to the configuration information; thereby, the performance and efficiency of SRS transmission can be improved.

[0140] Embodiments of the fourth aspect

[0141] The present embodiment provides a device for receiving a sounding reference signal. The device may be, for example, a network device, or one or more components or assemblies configured in the network device. The contents identical to those in the first to third aspects of the embodiment are not repeated here.

[0142] FIG6 is another schematic diagram of a device for receiving a sounding reference signal according to an embodiment of the present application. As shown in FIG6 , the device 600 for receiving a sounding reference signal includes:

[0143] A sending unit 601 is configured to send configuration information to a terminal device; wherein the configuration information is used to configure the terminal device to perform 3-port SRS transmission; and

[0144] The receiving unit 602 receives the SRS sent by the terminal device using the 3-port.

[0145] The above embodiments are merely exemplary of the present invention, but the present invention is not limited thereto. Appropriate modifications may be made based on the above embodiments. For example, the above embodiments may be used alone, or one or more of the above embodiments may be combined.

[0146] It is worth noting that the above only describes the components or modules related to the present application, but the present application is not limited thereto. The apparatus 600 for receiving a sounding reference signal may also include other components or modules. For details of these components or modules, reference may be made to related technologies.

[0147] In addition, for the sake of simplicity, FIG6 only illustrates the connection relationship or signal direction between various components or modules. However, it should be clear to those skilled in the art that various related technologies such as bus connection can be used. The above-mentioned components or modules can be implemented by hardware facilities such as processors, memories, transmitters, and receivers; the implementation of this application is not limited to this.

[0148] It can be seen from the above embodiment that the terminal device receives configuration information from the network device; wherein the configuration information is used to configure the terminal device to perform 3-port SRS transmission; and uses 3 ports to send SRS according to the configuration information; thereby, the performance and efficiency of SRS transmission can be improved.

[0149] Embodiments of the fifth aspect

[0150] An embodiment of the present application also provides a communication system, and reference may be made to FIG1 . The contents that are the same as those in the first to fourth aspects of the embodiments will not be repeated.

[0151] In some embodiments, the communication system 100 may include at least:

[0152] A network device that sends configuration information to a terminal device; wherein the configuration information is used to configure the terminal device to perform 3-port SRS transmission; and

[0153] The terminal device uses 3 ports to send SRS according to the configuration information.

[0154] The embodiment of the present application also provides a terminal device, but the present application is not limited thereto and may also be other devices.

[0155] Figure 7 is a schematic diagram of a terminal device according to an embodiment of the present application. As shown in Figure 7 , terminal device 700 may include a processor 710 and a memory 720. Memory 720 stores data and programs and is coupled to processor 710. It should be noted that this diagram is exemplary; other types of structures may be used to supplement or replace this structure to implement telecommunication or other functions.

[0156] For example, the processor 710 may be configured to execute a program to implement the method for transmitting a sounding reference signal as described in the embodiment of the first aspect. For example, the processor 710 may be configured to perform the following control: receiving configuration information from a network device; wherein the configuration information is used to configure the terminal device to perform 3-port SRS transmission; and transmitting the SRS using the 3 ports according to the configuration information.

[0157] As shown in Figure 7 , the terminal device 700 may further include: a communication module 730, an input unit 740, a display 750, and a power supply 760. The functions of these components are similar to those in the prior art and are not described in detail here. It is worth noting that the terminal device 700 does not necessarily include all of the components shown in Figure 7 , and these components are not essential. Furthermore, the terminal device 700 may also include components not shown in Figure 7 , for which reference may be made to the prior art.

[0158] An embodiment of the present application further provides a network device, which may be, for example, a base station, but the present application is not limited thereto and may also be other network devices.

[0159] Figure 8 is a schematic diagram illustrating the structure of a network device according to an embodiment of the present application. As shown in Figure 8 , network device 800 may include a processor 810 (e.g., a central processing unit (CPU)) and a memory 820 ; the memory 820 is coupled to the processor 810 . The memory 820 may store various data and may also store an information processing program 830 , which is executed under the control of the processor 810 .

[0160] For example, the processor 810 may be configured to execute a program to implement the method for receiving a sounding reference signal as described in the embodiment of the second aspect. For example, the processor 810 may be configured to perform the following control: sending configuration information to a terminal device; wherein the configuration information is used to configure the terminal device to perform 3-port SRS transmission; and receiving the SRS sent by the terminal device using the 3-port.

[0161] In addition, as shown in FIG8 , network device 800 may further include: a transceiver 840 and an antenna 850, etc.; wherein, the functions of the above components are similar to those in the prior art and are not described in detail here. It is worth noting that network device 800 does not necessarily include all the components shown in FIG8 ; in addition, network device 800 may also include components not shown in FIG8 , and reference may be made to the prior art for details.

[0162] An embodiment of the present application further provides a computer program, wherein when the program is executed in a terminal device, the program causes the terminal device to execute the method for sending a sounding reference signal as described in the embodiment of the first aspect.

[0163] An embodiment of the present application further provides a storage medium storing a computer program, wherein the computer program enables a terminal device to execute the method for sending a sounding reference signal as described in the embodiment of the first aspect.

[0164] An embodiment of the present application further provides a computer program, wherein when the program is executed in a network device, the program causes the network device to execute the method for receiving a sounding reference signal as described in the embodiment of the second aspect.

[0165] An embodiment of the present application further provides a storage medium storing a computer program, wherein the computer program enables a network device to execute the method for receiving a sounding reference signal as described in the embodiment of the second aspect.

[0166] The above devices and methods of the present application can be implemented by hardware or by a combination of hardware and software. The present application relates to such a computer-readable program that, when executed by a logic component, enables the logic component to implement the devices or components described above, or enables the logic component to implement the various methods or steps described above. The present application also relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, etc.

[0167] The method / device described in conjunction with the embodiments of the present application can be directly embodied as hardware, a software module executed by a processor, or a combination of the two. For example, one or more of the functional block diagrams shown in the figure and / or one or more combinations of functional block diagrams can correspond to various software modules of the computer program flow or to various hardware modules. These software modules can respectively correspond to the various steps shown in the figure. These hardware modules can be implemented by solidifying these software modules, for example, using a field programmable gate array (FPGA).

[0168] The software module may be located in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. A storage medium may be coupled to a processor so that the processor can read information from the storage medium and write information to the storage medium; or the storage medium may be an integral part of the processor. The processor and the storage medium may be located in an ASIC. The software module may be stored in the memory of the mobile terminal or in a memory card that can be inserted into the mobile terminal. For example, if the device (such as a mobile terminal) uses a large-capacity MEGA-SIM card or a large-capacity flash memory device, the software module may be stored in the MEGA-SIM card or the large-capacity flash memory device.

[0169] One or more of the functional blocks and / or one or more combinations of functional blocks described in the accompanying drawings may be implemented as a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, or any appropriate combination thereof for performing the functions described in this application. One or more of the functional blocks and / or one or more combinations of functional blocks described in the accompanying drawings may also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in communication with a DSP, or any other such configuration.

[0170] The present application has been described above in conjunction with specific embodiments. However, those skilled in the art should understand that these descriptions are merely illustrative and are not intended to limit the scope of protection of the present application. Those skilled in the art may make various modifications and variations to the present application based on the spirit and principles of the present application, and such modifications and variations are also within the scope of the present application.

[0171] Regarding the implementation methods including the above embodiments, the following additional notes are also disclosed:

[0172] 1. A method for transmitting a sounding reference signal, comprising:

[0173] The terminal device receives configuration information from the network device; wherein the configuration information is used to configure the terminal device to perform 3-port SRS transmission; and

[0174] The terminal device uses 3 ports to send SRS according to the configuration information.

[0175] 2. A method for receiving a sounding reference signal, comprising:

[0176] The network device sends configuration information to the terminal device; wherein the configuration information is used to configure the terminal device to perform 3-port SRS transmission; and

[0177] The network device receives the SRS sent by the terminal device using port 3.

[0178] 3. A terminal device comprises a memory and a processor, wherein the memory stores a computer program, and the processor is configured to execute the computer program to implement the method for sending a sounding reference signal as described in Note 1.

[0179] 4. A network device comprising a memory and a processor, wherein the memory stores a computer program, and the processor is configured to execute the computer program to implement the method for receiving a sounding reference signal as described in Note 2.

[0180] 5. A computer program product, comprising at least a computer program, wherein when the computer program is executed by a processor, the terminal device executes the method for sending a sounding reference signal as described in Note 1.

[0181] 6. A computer program product, comprising at least a computer program, wherein when the computer program is executed by a processor, the network device executes the method for receiving a sounding reference signal as described in Note 2.

Claims

1. A transmitting device for detecting a reference signal, comprising: a receiving unit that receives configuration information from a network device; wherein, the configuration information is used to configure a terminal device to perform 3-port sounding reference signal transmission; and a transmitting unit that uses 3 ports to transmit a sounding reference signal according to the configuration information.

2. The device according to claim 1, wherein, A 4-port sounding reference signal resource is configured, and 1 port in the 4-port sounding reference signal resource is not used for 3-port transmission. The sounding reference signal transmission power is evenly distributed among the three ports used for 3-port transmission in the 4-port sounding reference signal resource.

3. The apparatus according to claim 1, wherein A 2-port sounding reference signal resource and a single-port sounding reference signal resource are bundled for 3-port transmission. If the bundled sounding reference signal resources are located in the same OFDM symbol, the sounding reference signal transmission power is evenly distributed among the three ports used for 3-port transmission in the bundled sounding reference signal resources.

4. The device according to claim 1, wherein A 2-port sounding reference signal resource and a single-port sounding reference signal resource are bundled for 3-port transmission. If the bundled sounding reference signal resources are located in different OFDM symbols, the sounding reference signal transmission power is evenly distributed among the three ports used for 3-port transmission in the bundled sounding reference signal resources; or, the sounding reference signal transmission power is the same for the three ports used for 3-port transmission and the power of each port is determined by the 2-port sounding reference signal resource; or, the sounding reference signal transmission power is determined according to their respective OFDM symbols.

5. The device according to claim 1, wherein, Three single-port sounding reference signal resources are bundled for 3-port transmission. If the bundled sounding reference signal resources are located in the same OFDM symbol, the sounding reference signal transmission power is evenly distributed among the three ports used for 3-port transmission in the bundled sounding reference signal resources.

6. The apparatus according to claim 1, wherein Three single-port sounding reference signal resources are bundled for 3-port transmission. If the bundled sounding reference signal resources are located in different OFDM symbols, the sounding reference signal transmission power is evenly distributed among the three ports used for 3-port transmission in the bundled sounding reference signal resources; or, the sounding reference signal transmission power is determined according to their respective OFDM symbols.

7. The apparatus according to claim 1, wherein At least one of the following configurations for the sounding reference signal antenna switching operation is supported: 3Tx3Rx, 3Tx4Rx, 3Tx6Rx, 3Tx8Rx.

8. The device according to claim 7, wherein, A 4-port sounding reference signal resource is configured, and 1 port in the 4-port sounding reference signal resource is not used for 3-port transmission. The sounding reference signal resource configuration is predefined for the sounding reference signal antenna switching of 3Tx.

9. The device according to claim 8, wherein, In the sounding reference signal resource configuration, for 3Tx3Rx, configure one 4-port sounding reference signal resource and skip one port; for 3Tx4Rx, configure two 4-port sounding reference signal resources and skip one port in each sounding reference signal resource, or configure one 4-port sounding reference signal resource and one single-port sounding reference signal resource and skip one port in the 4-port sounding reference signal resource; For 3Tx6Rx, configure two 4-port sounding reference signal resources and skip one port in each sounding reference signal resource; For 3Tx8Rx, configure three 4-port sounding reference signal resources and skip one port in each sounding reference signal resource, or configure two 4-port sounding reference signal resources and one single-port sounding reference signal resource and skip one port of the 4-port sounding reference signal resource.

10. The device according to claim 7, wherein, The sounding reference signal resources are bundled for 3-port transmission by time division multiplexing, and the sounding reference signal resource configuration is predefined for sounding reference signal antenna switching of 3Tx.

11. The device according to claim 10, wherein, In the sounding reference signal resource configuration, For 3Tx3Rx, configure one 2-port sounding reference signal resource and one single-port sounding reference signal resource; For 3Tx4Rx, configure two 2-port sounding reference signal resources and two single-port sounding reference signal resources, or configure one 2-port sounding reference signal resource and two single-port sounding reference signal resources; For 3Tx6Rx, configure two 2-port sounding reference signal resources and two single-port sounding reference signal resources; For 3Tx8Rx, configure three 2-port sounding reference signal resources and three single-port sounding reference signal resources, or configure two 2-port sounding reference signal resources and two single-port sounding reference signal resources and another 2-port sounding reference signal resource.

12. The apparatus according to claim 10, wherein, The bundled sounding reference signal resources for 3-port transmission are regarded as a group; within the group, the sounding reference signal resources are located on two consecutive OFDM symbols, and an interval symbol is configured between the two groups.

13. The device according to claim 7, wherein, The sounding reference signal resources are bundled for 3-port transmission by frequency division multiplexing, or the bundled sounding reference signal resources occupy the same resource elements through different cyclic shifts on the same OFDM symbol, then the sounding reference signal resource configuration is predefined for sounding reference signal antenna switching of 3Tx.

14. The device according to claim 13, wherein, In the sounding reference signal resource configuration, For 3Tx3Rx, configure one 2-port sounding reference signal resource and one single-port sounding reference signal resource; For 3Tx4Rx, configure two 2-port sounding reference signal resources and two single-port sounding reference signal resources, or configure one 2-port sounding reference signal resource and two single-port sounding reference signal resources; For 3Tx6Rx, configure two 2-port sounding reference signal resources and two single-port sounding reference signal resources; For 3Tx8Rx, configure three 2-port sounding reference signal resources and three single-port sounding reference signal resources, or configure two 2-port sounding reference signal resources and two single-port sounding reference signal resources and another 2-port sounding reference signal resource.

15. The apparatus according to claim 13, wherein, The bundled sounding reference signal resources for 3-port transmission are regarded as a group; within the group, the sounding reference signal resources are located on the same one OFDM symbol, and an interval symbol is configured between the two groups.

16. A receiving device for a sounding reference signal, comprising: A sending unit, which sends configuration information to a terminal device; wherein the configuration information is used to configure the terminal device to perform 3-port sounding reference signal transmission; and A receiving unit, which receives the sounding reference signal sent by the terminal device using 3 ports.

17. A communication system, comprising: A network device, which sends configuration information to a terminal device; wherein the configuration information is used to configure the terminal device to perform 3-port sounding reference signal transmission; and A terminal device, which sends a sounding reference signal using 3 ports according to the configuration information.

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