Configuration method and device of SRS in duplex mode, equipment and storage medium

Abstract

Disclosed are a configuration method, apparatus and device for sounding reference signals (SRS) in a duplex mode, and a storage medium, the method comprising: a terminal receiving first configuration information from a network side device, the first configuration information being used for configuring SRS resources corresponding to at least one type of SRS; and the terminal sends the SRS according to the SRS resource, wherein the SRS resource comprises at least one of the following items: an uplink sub-band in a downlink time unit; a flexible time unit; an uplink subband within a flexible time unit; a non-downlink sub-band within a flexible time unit; an uplink time unit; and a non-downlink sub-band in the uplink time unit.

Description

Technical Field

[0001] This application belongs to the field of communication technologies, and particularly relates to a method, apparatus, device, and storage medium for configuring Sounding Reference Signal (SRS) in a duplex mode. Background Art

[0002] In the related art, a network-side device can configure Sounding Reference Signal (SRS) resources for a terminal to perform uplink beam training to determine the beam with the optimal signal quality. However, when introducing a duplex mode, how to configure SRS resources for SRS transmission is an urgent problem to be solved. Summary of the Invention

[0003] Embodiments of this application provide a method, apparatus, device, and storage medium for configuring SRS in a duplex mode, which can implement SRS configuration in a duplex mode.

[0004] In a first aspect, a method for configuring SRS in a duplex mode is provided. The method includes:

[0005] A terminal receives first configuration information from a network-side device, where the first configuration information is used to configure SRS resources corresponding to at least one type of Sounding Reference Signal (SRS);

[0006] The terminal sends the SRS according to the SRS resources; where the SRS resources include at least one of the following:

[0007] An uplink sub-band within a downlink time unit;

[0008] A flexible time unit;

[0009] An uplink sub-band within a flexible time unit;

[0010] A non-downlink sub-band within a flexible time unit;

[0011] An uplink time unit;

[0012] A non-downlink sub-band within an uplink time unit.

[0013] In a second aspect, a method for configuring SRS in a duplex mode is provided. The method includes:

[0014] A network-side device sends first configuration information to a terminal, where the first configuration information is used to configure at least one type of SRS, and the at least one type includes the type of SRS for a duplex mode.

[0015] In a third aspect, a device for configuring SRS in a duplex mode is provided, including:

[0016] A communication unit, configured to receive first configuration information from a network-side device, where the first configuration information is used to configure SRS resources corresponding to at least one type of sounding reference signal (SRS); and

[0017] Transmit the SRS according to the SRS resources; where the SRS resources include at least one of the following:

[0018] An uplink sub-band within a downlink time unit;

[0019] A flexible time unit;

[0020] An uplink sub-band within a flexible time unit;

[0021] A non-downlink sub-band within a flexible time unit;

[0022] An uplink time unit;

[0023] A non-downlink sub-band within an uplink time unit.

[0024] In a fourth aspect, there is provided a configuration apparatus for SRS in a duplex mode, including:

[0025] A communication unit, configured to send first configuration information to a terminal, where the first configuration information is used to configure SRS resources corresponding to at least one type of sounding reference signal (SRS);

[0026] where the SRS resources include at least one of the following:

[0027] An uplink sub-band within a downlink time unit;

[0028] A flexible time unit;

[0029] An uplink sub-band within a flexible time unit;

[0030] A non-downlink sub-band within a flexible time unit;

[0031] An uplink time unit;

[0032] A non-downlink sub-band within an uplink time unit.

[0033] In a fifth aspect, there is provided a terminal, where the terminal includes a processor and a memory, the memory stores a program or instruction that can run on the processor, and when the program or instruction is executed by the processor, the steps of the method described in the first aspect are implemented.

[0034] In a sixth aspect, there is provided a network-side device, where the network-side device includes a processor and a memory, the memory stores a program or instruction that can run on the processor, and when the program or instruction is executed by the processor, the steps of the method described in the second aspect are implemented.

[0035] In a seventh aspect, a readable storage medium is provided, on which a program or instructions are stored, and when the program or instructions are executed by a processor, the steps of the method described in the first aspect are implemented, or the steps of the method described in the second aspect are implemented.

[0036] In an eighth aspect, a wireless communication system is provided, including: a terminal and a network-side device, where the terminal can be used to execute the steps of the method described in the first aspect, and the network-side device can be used to execute the steps of the method described in the second aspect.

[0037] In a ninth aspect, a chip is provided, which includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is used to run a program or instructions to implement the method described in the first aspect, or to implement the method described in the second aspect.

[0038] In a tenth aspect, a computer program / program product is provided, the computer program / program product is stored in a storage medium, and the program / program product is executed by at least one processor to implement the method described in the first aspect, or to implement the method described in the second aspect.

[0039] In an embodiment of the present application, the network-side device can configure at least one type of SRS corresponding SRS resource for the terminal, where the SRS resource includes at least one of the following: an uplink sub-band within a downlink time unit; a flexible time unit; an uplink sub-band within a flexible time unit; a non-downlink sub-band within a flexible time unit; an uplink time unit; a non-downlink sub-band within an uplink time unit. The terminal can perform SRS transmission based on this SRS resource, so as to realize SRS transmission in a duplex mode. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 is a schematic diagram of a communication system architecture provided by an embodiment of the present application.

[0041] Figure 2 is a schematic diagram of full duplex provided by the present application.

[0042] Figure 3 is another schematic diagram of full duplex provided by the present application.

[0043] Figure 4 is a schematic diagram of gNB full duplex and UE full duplex provided by the present application.

[0044] Figure 5 is a schematic diagram of full duplex and guard band (GB) provided by the present application.

[0045] Figure 6It is a schematic flowchart of a method for configuring SRS in a duplex mode according to an embodiment of the present application.

[0046] Figure 7 It is a schematic diagram of a full-duplex mode and a guard interval according to an embodiment of the present application.

[0047] Figure 8 It is a schematic diagram of a transmission mode of SRS according to an embodiment of the present application.

[0048] Figure 9 It is a schematic diagram of another transmission mode of SRS according to an embodiment of the present application.

[0049] Figure 10 It is a schematic diagram of the association relationship between SRS and a sequence according to an embodiment of the present application.

[0050] Figure 11 It is a schematic diagram of another association relationship between SRS and a sequence according to an embodiment of the present application.

[0051] Figure 12 It is a schematic diagram of the SRS type according to an embodiment of the present application.

[0052] Figure 13 It is a schematic diagram of the SRS type according to an embodiment of the present application.

[0053] Figure 14 It is a schematic diagram of the selection method of the SRS type according to an embodiment of the present application.

[0054] Figure 15 It is a schematic block diagram of a method for configuring SRS in a duplex mode according to an embodiment of the present application.

[0055] Figure 16 It is a schematic block diagram of a method for configuring SRS in a duplex mode according to an embodiment of the present application.

[0056] Figure 17 It is a schematic block diagram of a communication device according to an embodiment of the present application.

[0057] Figure 18 It is a schematic diagram of the hardware structure of a terminal according to an embodiment of the present application.

[0058] Figure 19 It is a schematic block diagram of a network-side device according to an embodiment of the present application. Detailed implementation manners

[0059] Next, the technical solutions in the embodiments of the present application will be clearly described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application fall within the protection scope of the present application.

[0060] The terms "first", "second", etc. in the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such terms can be interchanged under appropriate circumstances so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first" and "second" are usually of the same category, and the number of objects is not limited. For example, the first object can be one or more. In addition, "or" in the present application means at least one of the connected objects. For example, "A or B" covers three scenarios, namely, Scenario 1: including A and not including B; Scenario 2: including B and not including A; Scenario 3: including both A and B. The character " / " generally indicates an "or" relationship between the associated objects before and after.

[0061] The term "indication" in the present application can be either a direct indication (or an explicit indication) or an indirect indication (or an implicit indication). Among them, a direct indication can be understood as that the sender clearly informs the recipient of specific information, operations to be performed, or request results, etc. in the sent indication; an indirect indication can be understood as that the recipient determines the corresponding information according to the indication sent by the sender, or makes a judgment and determines the operations to be performed or request results, etc. according to the judgment result.

[0062] It should be noted that the technology described in the embodiments of this application is not limited to the Ambient Internet of Things (IoT) system, but can also be used in other wireless communication systems, such as Long Term Evolution (LTE) / LTE-Advanced (LTE-A) systems, Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA), Wireless Local Area Networks (WLAN), Wireless Fidelity (WiFi), Bluetooth systems, or other systems. The terms "system" and "network" in the embodiments of this application are often used interchangeably, and the described technology can be used in the above-mentioned systems and radio technologies, as well as in other systems and radio technologies. The following description describes the New Radio (NR) system for example purposes, and the NR term is used in most of the following descriptions, but these technologies can also be applied to systems other than the NR system, such as the 6th Generation (6G) communication system. th Generation, 6G) communication system.

[0063] Figure 1A block diagram of a wireless communication system to which embodiments of the present application can be applied is shown. The wireless communication system includes a terminal 11 and a network-side device 12. Among them, the terminal 11 can be a mobile phone, a tablet personal computer, a laptop computer, a notebook computer, a personal digital assistant (PDA), a handheld computer, a netbook, an ultra-mobile personal computer (UMPC), a mobile internet device (MID), an augmented reality (AR), a virtual reality (VR) device, a robot, a wearable device, a flight vehicle, a vehicle user equipment (VUE), a shipborne device, a pedestrian user equipment (PUE), a smart home (home appliances with wireless communication functions, such as refrigerators, TVs, washing machines or furniture, etc.), a game console, a personal computer (PC), a teller machine or a self-service machine, etc. Wearable devices include: smart watches, smart bracelets, smart earphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart ankle chains, etc.), smart wristbands, smart clothing, etc. Among them, the vehicle-mounted device can also be called a vehicle-mounted terminal, a vehicle-mounted controller, a vehicle-mounted module, a vehicle-mounted component, a vehicle-mounted chip or a vehicle-mounted unit, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiments of the present application. The network-side device 12 can include an access network device or a core network device. Among them, the access network device can also be called a radio access network (RAN) device, a radio access network function or a radio access network unit. The access network device can include a base station, a wireless local area network (WLAN) access point (AP) or a wireless fidelity (WiFi) node, etc.Among them, the base station can be referred to as Node B (NB), Evolved Node B (eNB), the next generation Node B (gNB), New Radio Node B (NR Node B), access point, Relay Base Station (RBS), Serving Base Station (SBS), Base Transceiver Station (BTS), radio base station, radio transceiver, Basic Service Set (BSS), Extended Service Set (ESS), home Node B (HNB), home evolved Node B, Transmission Reception Point (TRP), or some other suitable term in the art. As long as the same technical effect is achieved, the base station is not limited to specific technical terms. It should be noted that in the embodiments of this application, only the base station in the NR system is taken as an example for introduction, and the specific type of the base station is not limited.

[0064] To facilitate a better understanding of the embodiments of this application, the enhanced duplex mode related to this application is described.

[0065] In the 5G mobile communication system, in order to adapt to diverse scenarios and service requirements, enhanced technologies have been made for full duplex. The main scenarios of 5G include Enhance Mobile Broadband (eMBB), Ultra-Reliable and Low Latency Communication (URLLC), and massive machine type of communication (mMTC). These scenarios pose requirements such as high reliability, low latency, large bandwidth, and wide coverage on the system.

[0066] In NR, configuring full-duplex operation can significantly improve the latency and coverage performance of Time Division Duplex (TDD) systems. Specifically, for example, in subband non-overlapping full duplex, since there is no overlap between the uplink subband and the downlink subband, the self-interference is small, which can reduce the transmission latency and enhance the coverage.

[0067] For a downlink (DL) slot (configured by tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated), the network configures a downlink Bandwidth Part (BWP) for the UE, such as Figure 2 Slot 1 in Figure 3 For an uplink (UL) slot (configured by tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated), the network configures a UL BWP for the UE, such as

[0068] Slot 4 in Figure 2 In the full duplex scenario for a downlink slot (configured by tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated), as shown in

[0069] There are the following cases:

[0070] Case 1: Configure the DL BWP, such as Slot 1;

[0071] Case 2: Configure the DL BWP and the uplink sub-band (UL sub band), such as Slot 2. Figure 3 In the full duplex scenario for an uplink slot, as shown in

[0072] There are the following cases:

[0073] Case 3: Configure the UL BWP, such as Slot 4;

[0074] For sub-band full duplex (SBFD) operation, an SBFD sub-band consists of 1 Resource Block (RB) or a continuous set of RBs with the same transmission direction.

[0075] The time unit (such as a slot or a symbol) used by the gNB for SBFD operation can be referred to as the SBFD time unit (such as a slot or a symbol).

[0076] An exemplary duplex mode is as follows: The network side is full duplex. At the same time, uplink transmission and downlink transmission can be carried out simultaneously at different frequency domain positions. To avoid interference between the uplink and the downlink, a certain guard band can be left between the frequency domain positions (corresponding to duplex sub-bands) corresponding to different transmission directions; the terminal side is half duplex, that is, the same as TDD. At the same time, only uplink transmission or downlink transmission can be performed, and the two cannot be carried out simultaneously. It can be understood that in this duplex mode, the uplink transmission and downlink transmission of the network side at the same time can only be for different terminals.

[0077] Another exemplary duplex mode is as follows: Both the terminal side and the network side are full duplex. As Figure 4 shown, that is, both the terminal side and the network side operate in the duplex mode. Specifically, for the terminal side and the network side, at the same time, UL transmission and DL transmission can be carried out simultaneously at different frequency domain positions.

[0078] For the full duplex of the UE side, a relatively large guard interval (guard band, GB) (greater than the GB of the base station frequency division (FD)) may be required to suppress self-interference. As Figure 5 shown.

[0079] For a communication device, since simultaneous UL reception and DL transmission will cause self-interference. To ensure the transmission in the interfered direction, the communication device needs to have the ability to cancel self-interference. For example, a guard band is reserved between the receiving frequency band and the transmitting frequency band, but this will reduce the throughput of the UE.

[0080] To facilitate a better understanding of the embodiments of the present application, the random access process related to the present application is described.

[0081] The random access process can be a contention-based random access process or a non-contention-based random access process. The random access process can be a four-step random access process (also known as a Type-1 random access process) or a two-step random access process (also known as a Type-2 random access process).

[0082] In the four-step random access procedure (4-step RACH), the UE first sends Message 1 (Msg1) to the network, which contains a preamble. After the network detects the preamble, it will send Message 2 (Msg2) or a Random Access Response (RAR) message, which contains the number of the preamble detected by the network and the uplink radio resources allocated to the UE to send Message 3 (Msg3). After the UE receives Msg2 and confirms that at least one of the preamble numbers carried in Msg2 is the same as the preamble number it sent, it sends Msg3 containing contention resolution information according to the resources indicated by the RAR. After the network receives Msg3, it will send Message 4 (Msg4) containing contention resolution information. After the UE receives Msg4 and confirms that the resolution information is the same as what it sent in Msg3, the four-step random access is completed.

[0083] The network includes uplink grant (UL grant) information in the RAR to indicate the Physical Uplink Shared Channel (PUSCH) scheduling information for Msg3, and also includes information such as Random Access Preamble ID (RAPID), Temporary Cell Radio Network Temporary Identity (TC-RNTI), and Timing Advance (TA). If the network does not receive Msg3 PUSCH, it can schedule the retransmission of Msg3 PUSCH in the Physical Downlink Control Channel (PDCCH) scrambled with TC-RNTI.

[0084] For the competitive random access process, different UEs randomly select preambles for transmission. In this way, different UEs may select the same preamble to send on the same time-frequency radio resources (RACH opportunity (RO) resources). This situation can be understood as a preamble collision of UEs. In this case, different UEs will receive the same RAR. Then, different UEs will perform the transmission of Msg3 PUSCH according to the scheduling information in the RAR UL grant. The network decodes the PUSCH (including the contention resolution information) sent by the UE on the Msg3 PUSCH scheduling resources. Therefore, the network will include the contention resolution information received in Msg3 in Msg4. If the contention resolution information in the Msg4 received by the UE matches the contention resolution information sent by the UE in Msg3 PUSCH, the UE considers the contention resolution successful. If they do not match, the contention resolution is considered unsuccessful.

[0085] If the contention resolution is unsuccessful, the UE reselects RACH resources and performs the transmission of the Physical Random Access Channel (PRACH) for the next random access attempt.

[0086] In the two-step random access process (2-step RACH), the first step is for the UE to send MsgA to the network side. After receiving MsgA, the network side sends MsgB to the UE. If the UE does not receive MsgB within a certain time, the UE will increment the counter for counting the number of MsgA transmissions and re-send MsgA. If the counter for counting the number of MsgA transmissions reaches a certain threshold, the UE will switch from the 2-step random access process to the 4-step random access process.

[0087] MsgA includes a MsgA preamble part and a MsgA PUSCH part. The preamble part is sent on the RO for 2-step RACH, and the PUSCH part is sent on the MsgA PUSCH resources associated with the MsgA preamble and the RO. The MsgA PUSCH resources are a set of PUSCH resources configured for each PRACH slot, including time-frequency resources and Demodulation Reference Signal (DMRS) resources, and are associated with the PRACH resources within the PRACH slot.

[0088] To facilitate the understanding of the embodiments of the present application, the uplink sounding reference signal (SRS) resources related to the present application are described.

[0089] In NR, uplink beam training is supported via SRS. However, in the initial access phase, since the terminal does not send SRS, there is no uplink beam management. The uplink beam used by the terminal when transmitting the preamble and Msg3, or MsgA, depends on the implementation of the terminal. However, in the 4-step RACH, there is a requirement for the consistency of the uplink beam used by the terminal to transmit Msg3 and the uplink beam of the Physical Uplink Control Channel (PUCCH) carrying the Hybrid Automatic Repeat request Acknowledgement (HARQ-ACK) of Msg4, that is, the terminal needs to ensure that the uplink beam used to transmit Msg3 is the same as the uplink beam of the PUCCH carrying the HARQ-ACK of Msg4. Similarly, for the 2-step RACH, the terminal needs to ensure that the uplink beam used to transmit MsgA is the same as the uplink beam of the PUCCH carrying the HARQ-ACK of MsgB. In the Radio Resource Control (RRC) connected state, the uplink beam training result based on SRS can be used for subsequent uplink transmissions.

[0090] When introducing the duplex mode, how to configure SRS is an urgent problem to be solved.

[0091] To facilitate the understanding of the technical solutions of the embodiments of the present application, the technical solutions of the present application are described in detail below through specific embodiments. The above related technologies can be arbitrarily combined with the technical solutions of the embodiments of the present application as optional solutions, and they all belong to the protection scope of the embodiments of the present application. The embodiments of the present application include at least some of the following contents.

[0092] Figure 6 It is a schematic diagram of the SRS configuration method 200 in the duplex mode according to the embodiments of the present application, as Figure 6 shown, the SRS configuration method 200 in the duplex mode may include at least some of the following contents:

[0093] S201, the network-side device sends the first configuration information;

[0094] Correspondingly, the terminal receives the first configuration information from the network-side device, and the first configuration information is used to configure the SRS resources corresponding to at least one type of SRS.

[0095] S202, the terminal sends SRS according to the SRS resources.

[0096] Correspondingly, the network-side device receives SRS according to the SRS resource.

[0097] In some embodiments, the SRS resource includes at least one of the following:

[0098] An uplink sub-band within a downlink time unit;

[0099] A flexible time unit;

[0100] An uplink sub-band within a flexible time unit;

[0101] A non-downlink sub-band within a flexible time unit;

[0102] An uplink time unit;

[0103] A non-downlink sub-band within an uplink time unit.

[0104] In some embodiments, the SRS resource can be used for the terminal to transmit SRS in a duplex mode.

[0105] The duplex mode described in the embodiments of the present application may be, for example, an enhanced duplex mode, or cross duplex (XDD), enhanced full duplex, enhanced full duplex mode. The embodiments of the present application do not limit this.

[0106] In the embodiments of the present application, the SRS type and the SRS resource type can be mutually replaced. The SRS sent using one type of SRS resource can be considered as this type of SRS, and one SRS resource type can be considered as one SRS resource configuration, or SRS resource configuration type.

[0107] It should be understood that in the embodiments of the present application, the SRS resource type can also be replaced with the SRS resource set type.

[0108] In the embodiments of the present application, the terminal supports full duplex, and the network-side device supports full duplex; or, the terminal supports half duplex, and the network-side device supports full duplex.

[0109] Among them, the terminal supporting half duplex may mean that the terminal can only perform downlink reception (such as receiving a DL signal or DL channel) or uplink transmission (such as sending a UL signal or UL channel) on one time unit. The terminal side supporting full duplex may mean that it can simultaneously perform uplink transmission (such as sending a UL signal or UL channel) and downlink reception (such as receiving a DL signal or DL channel) on one time unit.

[0110] In the embodiments of the present application, the network-side device adopting the full duplex mode can achieve the purposes of enhancing coverage, reducing transmission delay, and improving resource utilization efficiency. The terminal adopting the full duplex mode can, while obtaining the above-mentioned gains, also improve the DL or UL throughput.

[0111] In some embodiments, when using the full-duplex mode, a guard band needs to be reserved between UL transmission and DL transmission. For example, reserve GB to achieve frequency isolation and reduce self-interference. Since the self-interference cancellation ability of the terminal is weaker than that of the network-side device, the GB reserved by the terminal when using the front-duplex mode is larger than the GB reserved by the network-side device. That is, the terminal requires more reserved physical resource blocks (PRBs) as the guard band.

[0112] Such as Figure 7 In (a) of [reference], it is the sub-band and GB configuration of the network-side device in the full-duplex mode, that is, the time-frequency resources where the UL sub-band, DL sub-band, and GB of the network-side device are located. In the UL sub-band (SubBand, SB), the network-side device receives the UL channel or UL signal sent by the terminal. In the DL sub-band, the network-side device sends the DL channel or DL signal to the terminal. The DL transmission of the network-side device will cause self-interference to the UL reception.

[0113] Such as Figure 7 In (b) of [reference], it is the sub-band and GB configuration of the terminal side in the full-duplex mode, that is, the time-frequency resources where the UL sub-band, DL sub-band, and GB configured by the network-side device for the terminal are located. The UL transmission of the terminal will cause self-interference to the DL reception.

[0114] In some embodiments, the size of the GB reserved for the terminal is related to the capabilities of the terminal. For example, the GB reserved for a terminal with strong self-interference cancellation ability is smaller than the GB reserved for a terminal with weak self-interference cancellation ability.

[0115] In some embodiments, the first configuration information is sent through at least one of the following signaling:

[0116] System message (such as System Information Block (SIB) or Master Information Block (MIB), etc.), Radio Resource Control (RRC) signaling, Media Access Control Control Element (MAC CE), Downlink Control Information (DCI).

[0117] In some embodiments, the at least one type includes the type of SRS for the duplex mode. Optionally, it may also include the type of SRS for the non-duplex mode, such as the type of SRS for the terminal using the half-duplex mode.

[0118] In some embodiments, the types of SRS for the duplex mode may include, but are not limited to, at least one of the following:

[0119] SRS on the uplink sub-band of a downlink time unit (e.g., a downlink slot or a downlink symbol);

[0120] SRS on an uplink time unit (e.g., an uplink slot or an uplink symbol);

[0121] SRS on the non-downlink sub-band of an uplink time unit (e.g., resources outside the downlink sub-band configured within the uplink time unit);

[0122] SRS on a flexible time unit (e.g., a flexible slot or a flexible symbol);

[0123] SRS on the uplink sub-band of a flexible time unit (e.g., a flexible slot or a flexible symbol).

[0124] SRS on the non-downlink sub-band of a flexible time unit (e.g., if a downlink sub-band is configured on the flexible time unit, the non-downlink sub-band may be resources outside the downlink sub-band configured within the flexible time unit).

[0125] In the embodiments of the present application, the first configuration information is used by the terminal in the idle state (Idle) or the inactive state (Inactive). That is, the embodiments of the present application can support SRS transmission in the duplex mode in the idle state (Idle) or the inactive state (Inactive), improving the resource utilization efficiency in the idle state (Idle) or the inactive state (Inactive). Introducing SRS in the Idle or Inactive state can be used for uplink beam management or uplink capacity enhancement. SRS in the inactive state can also be used for terminal positioning in the inactive state.

[0126] In some embodiments, the first configuration information may be configured in the idle state (Idle) or the inactive state (Inactive), or, the first configuration information may be configured in the random access phase. In other words, the embodiments of the present application can obtain the SRS configuration in the duplex mode in the idle state (Idle) or the inactive state (Inactive) or in the random access phase, and the SRS configuration is more flexible.

[0127] In some other embodiments, the first configuration information may also be configured in the connected state. In other words, the embodiments of the present application can obtain the SRS configuration in the duplex mode in the connected state, and the SRS configuration is more flexible.

[0128] In some instances, the first configuration information may include at least one set of SRS resource configurations for configuring the time-frequency resources (or, the transmission occasion of the SRS) of the at least one type of SRS, sequences, purposes, etc.

[0129] In some embodiments, the SRS resource configuration may include at least one of the following:

[0130] SRS resource set identifier (srs-ResourceSetId);

[0131] SRS resource identifier list (srs-ResourceIdList) for indicating the SRS resource identifiers included in the SRS resource set;

[0132] SRS power control parameter alpha;

[0133] SRS power control parameter p0;

[0134] Path loss reference signal (pathlossReferenceRS)

[0135] Number of SRS resource ports (nrofSRS-Ports)

[0136] Transmission comb;

[0137] Resource mapping information (resourceMapping), for example, including start position (startPosition), number of symbols (nrofSymbols), repetition factor (repetitionFactor), etc.;

[0138] Frequency domain position (freqDomainPosition);

[0139] Frequency domain shift (freqDomainShift);

[0140] Frequency hopping parameter (freqHopping);

[0141] Sequence identifier corresponding to the SRS (sequenceId).

[0142] In some embodiments, the first configuration information is further used to configure the purpose of the SRS. For example, the SRS resource configuration may include the purpose (usage) of the SRS.

[0143] Exemplarily, the purpose of the SRS may include at least one of the following:

[0144] Beam management (Beammanagement);

[0145] Beam management for non - connected state, for example, including beam management for idle state and inactive state;

[0146] For determining a codebook:

[0147] For determining a non - codebook:

[0148] Antenna switching.

[0149] In some embodiments, the at least one type of SRS and the downlink reference signal have an association relationship. By introducing the association relationship between the downlink reference signal and SRS, the terminal can perform uplink beam training before cell access, determine a more suitable PRACH transmission beam, and improve the PRACH reception reliability.

[0150] Optionally, the downlink reference signal may include, for example, but is not limited to at least one of the following: Synchronization Signal Block (SSB), Channel State Information Reference Signal (CSI - RS), Tracking reference signal (TRS).

[0151] In the embodiments of the present application, the SRS and the downlink reference signal have an association relationship, which can also be expressed as: the SRS resource and the downlink reference signal resource have an association relationship. For example, the SRS resource and the SSB resource have an association relationship, and the SRS resource and the CSI - RS resource have an association relationship.

[0152] The SSB described in the embodiments of the present application can also be called a resource block, and this resource block includes at least one of a synchronization signal, a broadcast signal, a Physical Broadcast Channel (PBCH), and other system messages.

[0153] In some embodiments, the terminal can select a downlink reference signal (such as SSB). For example, select a target downlink reference signal (such as a target SSB) according to the measurement value of the downlink reference signal and the measurement value threshold (such as protocol regulations or indication by network - side devices). For example, select the downlink reference signal with a measurement value greater than the measurement value threshold as the target downlink reference signal. Further, the terminal can select and transmit the SRS associated with the target downlink reference signal according to the mapping relationship between the downlink reference signal and SRS.

[0154] For example, the network - side device can configure the SRS and related parameters (such as power parameters) on the uplink sub - band for the terminal through the SIB or MIB. Further, the terminal can detect the downlink reference signal, select the target downlink reference signal, and then select the SRS associated with the target downlink reference signal according to the association relationship between the target downlink reference signal and the SSB.

[0155] In some embodiments, the at least one type of SRS can have an association relationship with a UL signal or a UL channel: Message A (MsgA) in two - step random access (or, MsgA PUSCH), Physical Random Access Channel (PRACH).

[0156] For example, multiple SRSs are associated with one PRACH / MsgA / MsgA PUSCH. By introducing the association relationship between the PRACH / MsgA / MsgA PUSCH and multiple SRSs, different terminals can use different SRS - associated beams to send the same preamble, improving the capacity of the PRACH.

[0157] For another example, one SRS is associated with multiple PRACH / MsgA / MsgA PUSCH. By introducing the association relationship between the multiple PRACH / MsgA / MsgA PUSCH and the SRS, it is possible to support repeated transmission using multiple PRACH / MsgA / MsgA PUSCH associated with the same SRS, thereby improving the reliability of the PRACH / MsgA / MsgA PUSCH transmission.

[0158] In the embodiments of the present application, the fact that the SRS has an association relationship with a UL signal or a UL channel can also be expressed as:

[0159] The SRS resource has an association relationship with the UL signal resource or the UL channel resource. For example, the SRS resource has an association relationship with the MsgA resource or the MsgA PUSCH resource, and the SRS resource has an association relationship with the PRACH resource.

[0160] The association relationship in the embodiments of the present application can also be referred to as a mapping relationship.

[0161] In some embodiments, the SRS can be sent periodically, as Figure 8 shown. For example, the period of the SRS can be configured through the first configuration information.

[0162] In some embodiments, on different SRS resources, the terminal sends SRS using different spatial relationship information (such as beams), which helps ensure that the network-side device obtains the spatial relationship information (such as the transmission beam direction) with the best reception quality on the terminal side, thus ensuring the reliability of UL transmission.

[0163] For example, on different SRS resources within an SRS period, the terminal sends SRS using different beams. As Figure 8 shown, 4 SRS resources are sent within one period, namely, SRS1 to SRS4, which are sent using beams 1 to 4 respectively.

[0164] In some embodiments, if the number of beams M supported by the terminal is less than the number of SRS resources N configured by the network-side device, the terminal can send SRS on the first M SRS resources and does not send SRS on the remaining N - M SRS resources.

[0165] As Figure 9 shown, if the terminal supports at most 2 beams and the network-side device indicates 4 SRS occasions, then the terminal can send SRS using two different beams on the first two SRS occasions and does not send SRS on the remaining 2 SRS occasions. Optionally, the terminal can also send SRS in a polling manner. That is, send SRS using two different beams on the first two SRS occasions and also send SRS using two different beams on the last two SRS occasions.

[0166] In some embodiments, SRS is used for beam management. For example, after sending SRS, the network-side device can measure the SRS sent by the terminal, select the SRS with the best reception quality, and notify the terminal so that the terminal can use the beam corresponding to this SRS for subsequent random access.

[0167] In some embodiments, there is an association relationship between the at least one type of SRS and the response sequence, and the network-side device can implicitly indicate the selected SRS to the terminal through the response sequence. This association relationship can be specified by the protocol or configured by the network-side device, such as configured through the first configuration information.

[0168] In some embodiments, the response sequences associated with different types of SRS are configured on different frequency-domain resources, such as different PRBs, as Figure 10 shown. In this way, the terminal can determine which response sequence the network-side device has sent according to the frequency-domain resource where the response sequence is located, and thus determine which SRS the network-side device has indicated to the terminal.

[0169] For example, after the network-side device selects a target SRS by measuring the SRS, it can send the response sequence associated with the target SRS to the terminal. The response sequence is sent on the corresponding frequency-domain resource. Thus, the terminal can determine the SRS selected by the network-side device based on the response sequence and / or the frequency-domain resource where the response sequence is located in combination with the association relationship.

[0170] In some embodiments, the network-side device can configure the time-frequency resources of the response sequence associated with at least one type of SRS for the terminal. For example, it is configured through the first configuration information.

[0171] In some embodiments, the response sequence can be a CSI-RS sequence. For example, as Figure 11 shown, the network-side device configures 4 SRS resources to correspond one-to-one with 4 sequences, that is, SRS1 is associated with sequence 1, SRS2 is associated with sequence 2, SRS3 is associated with sequence 3, and SRS4 is associated with sequence 4. When the network-side device monitors that the signal quality of SRS3 is the best, it sends sequence 3 on the time-frequency resource of sequence 3. When the terminal monitors sequence 3, it knows that the network-side device will achieve better reception quality when using the beam of SRS3. When sending Msg1 / Msg3 / MsgA, etc. subsequently, the beam corresponding to SRS3, that is, beam 3, can be used.

[0172] In some embodiments, the at least one type of SRS includes at least one of the following types:

[0173] SRSs located on different frequency-domain resources;

[0174] SRSs that need to be activated;

[0175] SRSs that do not need to be activated;

[0176] SRSs for different service types;

[0177] SRSs for different purposes;

[0178] SRSs for different terminal types;

[0179] SRSs on flexible time units (for example, SRSs on resources outside the DL subbands on flexible time units);

[0180] SRSs overlapping with downlink reference signal resources;

[0181] SRSs not overlapping with downlink reference signal resources;

[0182] SRSs on the uplink subbands. Optionally, further according to the time unit where the SRS is located, it can also be divided into: uplink subbands on flexible time units, uplink subbands on downlink time units, and uplink subbands on UL time units;

[0183] The SRS on the uplink time unit, that is, the frequency domain resources where the SRS is located are all uplink frequency domain resources.

[0184] That is, the network device can classify the SRS type according to at least one of whether activation is required, the applicable service type, the purpose of the SRS resource, the applicable terminal type, the time unit where the SRS is located, the frequency domain unit where the SRS is located, and whether it overlaps with the downlink reference signal.

[0185] Exemplarily, the SRSs located on different frequency domain resources may include but are not limited to at least one of the following:

[0186] SRSs located on different subbands, different frequency bands, different carriers, and different BWPs.

[0187] Exemplarily, the SRSs for different service types may include but are not limited to at least one of the following:

[0188] SRS for Multimedia Broadcast Service (MBS), SRS for unicast service, SRS for machine type communication, and SRS for communication sensing type. By classifying the SRS type according to the service type supported by the SRS, it is beneficial to ensure that the terminal selects the appropriate type of SRS during service transmission.

[0189] Exemplarily, the SRSs for different terminal types (or terminal capabilities) may include but are not limited to at least one of the following:

[0190] SRS for traditional terminals, SRS for Reduced Capability (RedCap) terminals, and SRS for zero-power terminals. By classifying the SRS type according to the terminal type supported by the SRS, it is beneficial to ensure that different types of terminals select the appropriate type of SRS.

[0191] In some embodiments, the downlink time unit may include but is not limited to at least one of the following:

[0192] Orthogonal frequency-division multiplexing (OFDM) symbols, time slots, subframes, frames, microseconds, milliseconds, seconds, minutes, hours, days, weeks, months.

[0193] In some embodiments, the uplink time unit may include but is not limited to at least one of the following:

[0194] Orthogonal frequency-division multiplexing (OFDM) symbol, time slot, subframe, frame, microsecond, millisecond, second, minute, hour, day, week, month.

[0195] In some embodiments, the flexible time unit may include, but is not limited to, at least one of the following:

[0196] Orthogonal frequency-division multiplexing (OFDM) symbol, time slot, subframe, frame, microsecond, millisecond, second, minute, hour, day, week, month.

[0197] Among them, the flexible time unit can be used for uplink transmission or downlink transmission.

[0198] Hereinafter, taking the uplink time unit as the UL symbol, the downlink time unit as the DL symbol, and the flexible time unit as the flexible symbol as an example for illustration, but the present application is not limited thereto.

[0199] In some embodiments, the time-frequency resource position where the SRS is located includes at least one of the following:

[0200] UL sub-band on the DL symbol;

[0201] UL sub-band on the UL symbol;

[0202] UL symbol;

[0203] Flexible symbol.

[0204] In some embodiments, for the flexible symbol, the time-frequency resource position where the SRS is located includes at least one of the following:

[0205] If there is no UL sub-band configured on the flexible symbol, but a DL sub-band is configured, the SRS can occupy the time-frequency resources outside the DL sub-band on the flexible symbol;

[0206] If only the UL sub-band is configured on the flexible symbol, the SRS is located on the UL sub-band;

[0207] If there is no UL sub-band and DL sub-band configured on the flexible symbol, the SRS can occupy part or all of the time-frequency resources on the flexible symbol.

[0208] In some embodiments, for the network-side device and the terminal that support the duplex mode, the symbols can have the following types:

[0209] DL symbol;

[0210] DL symbol configured with UL SB;

[0211] Configure the UL symbols of the DL SB;

[0212] UL symbols.

[0213] In some embodiments, as Figure 12 shown, according to the time unit or frequency domain unit where the SRS is located, it may include at least one of the following types of SRS, or rather, include the following two types of SRS resource / SRS resource set configurations:

[0214] 1. The SRS configured on the UL sub-band. In this case, the time unit where the UL sub-band is located may be a UL time unit, or it may also be a DL time unit. This type of SRS is denoted as Type A SRS, and the SRS resource / SRS resource set corresponding to this type of SRS can be considered as Type A SRS resource.

[0215] 2. The SRS configured on the UL time unit. In this case, there is no DL sub-band configured on the UL time unit. This type of SRS is denoted as Type B SRS, and the SRS resource / SRS resource set corresponding to this type of SRS can be considered as Type B SRS resource.

[0216] For simplicity of description, the SRS types of flexible symbols are not classified separately. The SRS configured on the flexible time unit can be classified in a similar manner. For example, the SRS configured on the uplink sub-band of the flexible time unit can be Type A SRS. The SRS configured on the flexible time unit (where there is no uplink sub-band and no DL sub-band configured on this flexible time unit) can be Type B SRS.

[0217] In some embodiments, according to the overlapping situation between the SRS and the downlink reference signal (such as SSB) or the common DL channel, it may include at least one of the following types of SRS, or rather, the following two types of SRS resource / SRS resource set configurations:

[0218] 1. The SRS is configured on the UL SB of the DL symbol where there is an SSB / common DL channel, that is, the SRS overlaps with the SSB / common DL channel in the time domain, as Figure 12 Configuration 1 in. In this configuration, the uplink transmission of one terminal will interfere with the reception of the SSB / common DL channel of other terminals, that is, there is cross-link interference. If the terminal uses this SSB for measurement or needs to decode the common DL channel to obtain key information (such as control information), it will also receive self-interference.

[0219] 2. The SRS is configured on the UL SB of the DL symbol where there is no SSB / common DL channel, that is, the SRS does not overlap with the SSB / common DL channel in the time domain, as Figure 12Configuration 2. In this configuration, the uplink transmission of one terminal may interfere with the reception of the DL channels or DL signals of other terminals, such as PDCCH, Physical Downlink Shared Channel (PDSCH), or CSI-RS, etc.

[0220] 3. The SRS is configured on the UL SB of the UL symbol, such as Figure 12 Configuration 3 in. The interference situation in this configuration is similar to that in Configuration 2.

[0221] 4. The SRS is configured on the UL symbol, such as Figure 12 Configuration 4 in. There is no cross-link interference in this configuration.

[0222] In some embodiments, the SRS has the following association relationship with the downlink reference signal (such as SSB):

[0223] At least one downlink reference signal is associated with the SRS resources on at least one uplink time unit and / or the SRS resources on one uplink subband. In this way, the terminal can choose to send the SRS on the uplink time unit, or it can also choose to send the SRS on the uplink subband, which can reduce the delay of beam training.

[0224] For example, as Figure 13 shown, SSB1 is associated with SRS1-1 and SRS1-2. Among them, SRS1-1 is configured on the UL SB, and SRS1-2 is configured on the UL symbol. Then the terminal can choose to send the SRS on the UL SB or transmit the SRS on the UL symbol, so that more SRS transmission opportunities can be obtained and the beam training delay can be reduced.

[0225] It should be understood that in Figure 13 , SRS1-1 and SRS1-2 can correspond to different SRS resource configurations or the same SRS resource configuration. SRS2-1 and SRS2-2 can correspond to different SRS resource configurations or the same SRS resource configuration. Optionally, the network-side device can configure the terminal to preferentially select the SRS resources on the UL SB and then select the SRS resources on the UL symbol.

[0226] In some embodiments, multiple downlink reference signals are at least associated with one SRS located on the UL symbol and one SRS on the UL SB. For example, the SRSs associated with different downlink reference signals can be the same, or they can also be different.

[0227] In some embodiments, each type of SRS in the at least one type corresponds to a transmission count threshold (denoted as SRS-RetransmissionCounter), or rather, the maximum number of transmissions. This transmission count threshold can be specified by the protocol or configured by the network-side device.

[0228] Optionally, the transmission count thresholds corresponding to each SRS type can be the same or different.

[0229] In the case where the terminal does not receive the response sequence for the SRS from the network-side device, the terminal can retransmit the SRS. For example, the SRS is sent in a subsequent SRS period or SRS occasion, and the transmission count of the SRS is incremented by one.

[0230] For example, for Type A SRS, a transmission count threshold A (denoted as SRS-RetransmissionCounterA) is configured, and for Type B SRS, a transmission count threshold B (denoted as SRS-RetransmissionCounter B) is configured. If the terminal preferentially selects to send Type A SRS, and does not receive the response sequence from the network-side device on the time-frequency resources of the response sequence, and the transmission count of the SRS has not reached SRS-RetransmissionCounter A, the terminal retransmits the SRS on the subsequent SRS occasion of Type A SRS.

[0231] In some embodiments, each type of SRS in the at least one type corresponds to a transmission time threshold, or rather, the maximum transmission time. This transmission time threshold can be specified by the protocol or configured by the network-side device.

[0232] Optionally, the transmission time thresholds corresponding to each SRS type can be the same or different.

[0233] In the case where the terminal does not receive the response sequence for the SRS from the network-side device and has not reached the maximum transmission time of the SRS, the terminal can retransmit the SRS. For example, the SRS is sent in a subsequent SRS period or SRS occasion. When the maximum transmission time of the SRS is reached, the transmission of the SRS stops at most.

[0234] For example, for Type A SRS, a transmission time threshold A is configured, and for Type B SRS, a transmission time threshold A is configured. If the terminal preferentially selects to transmit Type A SRS, and no response sequence from the network device is received on the time-frequency resources of the response sequence, and the transmission time of the SRS does not reach the transmission time threshold A, the terminal will continue to transmit the SRS on the SRS occasion of the subsequent Type A SRS.

[0235] In some embodiments, each type of SRS in the at least one type respectively corresponds to a first timer (or referred to as an SRS detection failure timer) for determining the maximum time length for receiving a response from the network device to the transmitted SRS. When the first timer expires, if the terminal does not receive a response from the network device to the SRS, it indicates that the network device fails to detect the SRS. Among them, the first timer is started after the terminal transmits the SRS.

[0236] For example, for Type A SRS, an SRS detection failure timer A is configured, and for Type B SRS, an SRS detection failure timer B is configured. If the terminal preferentially selects to transmit Type A SRS, and no response sequence for Type A SRS is received before the SRS detection failure timer A expires, it indicates that the network device fails to detect Type A SRS.

[0237] Optionally, when the first timers corresponding to the at least one type of SRS all expire, the terminal determines that the beam management for non-connected state fails and stops transmitting the SRS.

[0238] In this case, the beam used by the terminal to send Msg1 or Msg3 etc. in the random access process can be determined by the terminal, for example, randomly select a beam.

[0239] In some embodiments, the at least one type of SRS resources correspond to different transmission powers. The transmission power corresponding to each type of SRS can be configured by the network device or can also be specified by the protocol.

[0240] For example, the network device can configure different transmission powers for Type A SRS and Type B SRS. Optionally, the transmission power of Type B SRS is greater than that of Type A SRS because there is no cross-link interference or self-interference problem for Type B SRS, so a larger transmission power can be used. There is a cross-link interference or self-interference problem for Type A SRS, so a smaller transmission power is required to reduce interference to other terminals or to itself.

[0241] In some embodiments of the present application, the method 200 further includes:

[0242] Selecting a target type of SRS from the at least one type of SRS according to the first information;

[0243] Wherein, the first information includes at least one of the following:

[0244] The measurement quantity of the downlink reference signal;

[0245] The order of the SRS resources corresponding to the at least one type of SRS;

[0246] Whether the SRS resources corresponding to the at least one type of SRS are activated or deactivated;

[0247] The priority of the at least one type of SRS;

[0248] The information of the downlink reference signal associated with the at least one type of SRS;

[0249] The bandwidth information of the terminal;

[0250] The carrier information of the terminal;

[0251] The bandwidth part BWP information of the terminal;

[0252] The capability information of the terminal;

[0253] The access status of the terminal;

[0254] The service type of the service to be transmitted by the terminal.

[0255] Wherein, the target type can be considered as the type of SRS used for actually transmitting the SRS.

[0256] In some embodiments, the selecting a target type of SRS from the at least one type of SRS according to the first information can also be expressed as:

[0257] Selecting a target type of SRS resource from the at least one type of SRS resources according to the first information; or

[0258] Selecting a target type of SRS resource configuration from at least one SRS resource configuration according to the first information.

[0259] It should be understood that in the embodiments of the present application, when selecting the SRS type according to the SRS resources, selecting a certain SRS resource means selecting the SRS resource type corresponding to the SRS resource, that is, selecting the SRS of the SRS resource type.

[0260] The following describes the selection method of the SRS type in combination with Embodiment 1.

[0261] Embodiment 1-1: Select the SRS type according to the order of the SRS resources, or rather, select the SRS resources.

[0262] In some embodiments, the order of the SRS resources includes at least one of the following:

[0263] The time order of the SRS resources, the frequency order of the SRS resources.

[0264] For example, according to the chronological order of the SRS resources, preferentially select the latest SRS resource (that is, select the SRS resource type corresponding to the latest SRS resource), which is beneficial to reducing the beam training delay.

[0265] For another example, according to the frequency order of the SRS resources, for example, preferentially select the SRS resource with a lower frequency (that is, select the SRS resource type corresponding to the SRS resource).

[0266] For yet another example, select the SRS type by combining the time order and the frequency order of the SRS resources. For example, take the time order as the first order and the frequency order as the second order, or, alternatively, take the frequency order as the first order and the time order as the second order.

[0267] For example, as Figure 14 shown, one SSB is associated with 4 SRS occasions, and each SRS occasion includes two SRS resources. Among them, the SRS resources in SRS occasion 1 and SRS occasion 2 are Type A SRS. SRS occasion 3 and SRS occasion 4 are Type B SRS.

[0268] The terminal can select the SRS type according to the above order.

[0269] As an example, if in the order of frequency domain first and then time domain, the terminal selects the SRS resources in the following order:

[0270] The SRS resources in SRS occasion 1 (that is, SRS resource 1 or SRS resource 2), the SRS resources in SRS occasion 2 (SRS resource 3 or SRS resource 4), the SRS resources in SRS occasion 3 (SRS resource 5 or SRS resource 6), the SRS resources in SRS occasion 4 (SRS resource 7 or SRS resource 8).

[0271] As an example, if in the order of time domain first and then frequency domain, the terminal selects SRS resources in the following order:

[0272] The SRS resources in SRS occasion 1 (i.e., SRS resource 1 or SRS resource 2), the SRS resources in SRS occasion 3 (SRS resource 5 or SRS resource 6), the SRS resources in SRS occasion 2 (SRS resource 3 or SRS resource 4), the SRS resources in SRS occasion 4 (SRS resource 7 or SRS resource 8).

[0273] Embodiment 1-2: Select the SRS type according to the activation / deactivation state of the SRS resource, or rather, select the SRS resource.

[0274] In some embodiments, the network side device can activate / deactivate the SRS resource. For example, it notifies the terminal through common signaling that some or all of a certain type of SRS resource are activated / deactivated. It can also activate / deactivate some or all of a certain type of SRS resource through preset conditions. If some or all of a certain type of SRS resource need to be activated to be used, whether the terminal selects this type of SRS resource can be determined according to whether the optional SRS resources in this type of SRS resource are activated.

[0275] In some embodiments, when the preset conditions are met, a certain type of SRS is activated, and further the terminal can use the activated SRS resource. For example, the network side device configures Type A SRS resources and Type B SRS resources for the terminal. The network side device configures the terminal to preferentially use a certain type of SRS resource. For example, the terminal preferentially selects Type A SRS resources, and the terminal can only use Type B SRS resources after the beam training of Type A SRS resources fails. For example, when sending SRS using Type A SRS resources reaches the transmission times threshold or the maximum transmission time. After reaching the predefined transmission times or the maximum transmission time, the Type A SRS resources are deactivated or invalidated.

[0276] It should be understood that the activation method of the SRS resources exemplified here is only an example, but this application is not limited thereto. In the following embodiments, when the terminal switches from the first type of SRS resource to the second type of SRS resource, it can be considered that the second type of SRS resource is activated and the first type of SRS resource is deactivated. Therefore, the switching condition of the SRS resource can also be considered as the activation / deactivation condition of the SRS resource.

[0277] In some embodiments, if all SRS resources of Type A (i.e., resources for transmitting Type A SRS) are not activated and some or all SRS resources of Type B (i.e., resources for transmitting Type B SRS) are activated, the terminal can select the activated SRS resources among the SRS resources of Type B.

[0278] In some embodiments, the terminal can also select SRS resources according to whether the SRS resources are effective or ineffective. For example, the network notifies the terminal to activate the SRS resources at time n, and the SRS resources can become effective and the terminal can use the SRS resources at n + k. k can be indicated by the network-side device or predefined.

[0279] For example, if a type of SRS resources needs to be activated and become effective before it can be used, the terminal considers whether the SRS resources are effective when selecting SRS resources. For example, if the first type of SRS resources is activated and effective, and the second type of SRS resources is activated but not effective, the terminal can preferentially select the first type of SRS resources.

[0280] That is, when a type of SRS resources has been activated or become effective, the terminal preferentially selects this type of SRS resources for SRS transmission. It is assumed here that this type of SRS resources needs to be activated.

[0281] Embodiments 1-3: Select the SRS type according to the priority of the SRS type (or rather, the SRS resource type), or rather, select the SRS resources.

[0282] In some embodiments, different types of SRS resources can be configured with different priorities. Optionally, the priorities corresponding to the SRS resource types can be specified by the protocol or configured by the network-side device. Further, the terminal can select SRS resources based on the priorities of the SRS resource types. For example, preferentially select the SRS resources of the SRS resource type with a higher priority.

[0283] In some embodiments, the information of the reference signal associated with the SRS includes at least one of the following:

[0284] The measurement of the downlink reference signal (such as SSB or CSI-RS) associated with the at least one type of SRS, or the path loss between the network-side device and the terminal;

[0285] Whether the downlink reference signal associated with the at least one type of SRS is effective or ineffective;

[0286] The priority of the downlink reference signal or frequency point associated with the at least one type of SRS;

[0287] The type of the downlink reference signal or frequency point associated with the at least one type of SRS;

[0288] The service type supported by the downlink reference signal or frequency point associated with the at least one type of SRS;

[0289] The access state supported by the downlink reference signal or frequency point associated with the at least one type of SRS.

[0290] In some embodiments, the measurement quantities of the downlink reference signal include but are not limited to at least one of the following:

[0291] Reference Signal Receiving Power (RSRP) (such as Synchronization Signal Reference Signal Received Power (SS-RSRP)), Reference Signal Receiving Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Received Signal Strength Indication (RSSI).

[0292] If the measurement quantity of the downlink reference signal (such as RSRP) between the terminal and the network-side device is high, it indicates that the path loss between the terminal and the network-side device is low, the terminal is close to the network-side device, and the transmission power of the SRS used can be low. In this way, the cross-link interference to the downlink reception of other terminals (such as receiving SSB / common DL channels) is also low, and the self-interference to the measurement or reception of the DL channel / signal of the terminal itself at the same time is also relatively low.

[0293] If the measurement quantity of the downlink reference signal (such as RSRP) between the terminal and the network-side device is low, it indicates that the path loss between the terminal and the network-side device is high, the terminal is far from the network-side device, and the transmission power of the SRS used also needs to be high. In this case, the cross-link interference to the downlink reception of other terminals (such as receiving SSB / common DL channels) is also high. This is not conducive to other terminals receiving key signals or channels such as SSB and common DL channels and the reception of DL data channels, and in severe cases, it will affect the access and normal communication of other terminals. Moreover, the self-interference to the measurement or reception of the DL channel / signal of the terminal itself at the same time is also relatively high, which will also have a negative impact.

[0294] In some embodiments, for at least one type of SRS configured on the UL sub - band, the SRS with a relatively larger measurement quantity of the downlink reference signal can be preferentially selected. For example, the SRS associated with the reference signal whose measurement quantity is greater than a certain measurement quantity threshold is preferentially selected.

[0295] In some embodiments, each type of SRS in the at least one type corresponds to a first measurement quantity threshold. The terminal can select the SRS of the target type from the at least one type of SRS according to the measurement quantity of the downlink reference signal associated with the at least one type of SRS and the first measurement quantity threshold corresponding to the at least one type of SRS.

[0296] In some embodiments, the first measurement quantity threshold corresponding to each type of SRS is predefined or configured by the network - side device. Optionally, the first measurement quantity threshold is greater than or equal to a preset measurement quantity threshold, where the preset measurement quantity threshold can be specified by the protocol or configured by the network - side device. This preset measurement quantity threshold is the transmission condition of the SRS, that is, when the measurement quantity of the downlink reference signal associated with the SRS is greater than or equal to this preset measurement quantity threshold, the SRS can be transmitted on the configured SRS resource.

[0297] For example, a measurement quantity threshold 1 is configured for Type A SRS, and a measurement quantity threshold 2 is configured for Type B SRS, where the measurement quantity threshold 1 is greater than the measurement quantity threshold 2. Optionally, the measurement quantity threshold 1 and the measurement quantity threshold 2 are greater than the preset measurement quantity threshold. Further, the terminal can select the SRS of the target type according to the measurement quantities of the downlink reference signals respectively associated with Type A SRS and Type B SRS and the measurement quantity thresholds 1 and 2.

[0298] For example, if the measurement quantity of the SSB associated with Type A SRS is greater than the measurement quantity threshold 2 but less than the measurement quantity threshold 1, then Type B SRS can be selected, that is, the SRS resource configured on the uplink symbol is selected. Among them, the measurement quantity threshold 2 may not be configured.

[0299] For another example, if the measurement quantity of the SSB associated with Type A SRS is greater than or equal to the measurement quantity threshold 1, then Type A SRS or Type B SRS can be selected. The network - side device can configure the terminal to preferentially select Type A SRS, that is, the SRS configured on the UL SB, which can provide more beam training opportunities, help reduce the beam training delay, and at the same time reduce the interference to other terminals.

[0300] Embodiments 1 - 5: Select the SRS type according to whether the downlink reference signal associated with the SRS is valid or invalid.

[0301] For example, if the downlink reference signal associated with a type of SRS needs to be effective to be used. For example, an SSB associated with a type of SRS belongs to an on-demand SSB and needs to be activated and effective before it can be used. Then, when the terminal selects an SRS type, it can consider whether the downlink reference signal associated with the SRS is effective. For example, if the downlink reference signal associated with the first type of SRS is activated and effective, and the second type of SRS is activated but not effective, the terminal can preferentially select the first type of SRS.

[0302] Embodiments 1-6: Select the SRS type according to the priority of the downlink reference signal / frequency point associated with the SRS.

[0303] In some embodiments, the priorities of different downlink reference signals / frequency points can be configured. For example, the priorities of different downlink reference signals / frequency points are specified by the protocol, or configured by the network-side device, such as through MIB or SIB configuration. Further, the terminal can select the SRS type based on the priority of the downlink reference signal / frequency point associated with the SRS. For example, preferentially select the SRS associated with the downlink reference signal / frequency point with a higher priority.

[0304] In some other embodiments, the terminal can also select the downlink reference signal according to a preset rule, and further select the SRS associated with the downlink reference signal. For example, according to the priority of the service to be transmitted, select the downlink reference signal with the same priority, and then select the SRS associated with the downlink reference signal. As an example, SSB1 corresponds to priority 1, and SSB2 corresponds to priority 2, where priority 1 is higher than priority 2. When the terminal needs to transmit a high-priority service, then select the SRS resource corresponding to SSB with priority 1.

[0305] Embodiments 1-7: Select the SRS type according to the type of the downlink reference signal / frequency point associated with the SRS.

[0306] In some embodiments, the types of different downlink reference signals / frequency points can be configured. Optionally, the types of downlink reference signals / frequency points can be specified by the protocol, or configured by the network-side device, such as through MIB or SIB configuration. The terminal can select the corresponding type of downlink reference signal according to a preset rule (such as the type of service to be transmitted), and further select the SRS associated with the downlink reference signal.

[0307] Exemplarily, the types of downlink reference signals / frequency points can include, but are not limited to, at least one of the following:

[0308] TDD, Frequency Division Duplex (FDD), Non-Terrestrial Network (NTN), Reduced Capability (RedCap).

[0309] For example, if the type of SSB1 is type 1 (e.g., TDD) and the type of SSB2 is type 2 (e.g., FDD), when the terminal needs to send type 1 service, then select the SRS resource associated with the type 1 SSB.

[0310] Embodiments 1-8: Select the type of SRS according to the service type supported by the downlink reference signal / frequency point associated with the SRS.

[0311] In some embodiments, the service types supported by different downlink reference signals / frequency points can be configured. Optionally, the service types targeted by the downlink reference signals / frequency points can be specified by the protocol or configured by the network-side device, such as through MIB or SIB configuration.

[0312] In some embodiments, the terminal can select the downlink reference signal that supports this type of service according to a preset rule (e.g., the type of service to be transmitted), and further select the SRS associated with the downlink reference signal.

[0313] Exemplarily, the service types supported by the downlink reference signal / frequency point can include but are not limited to at least one of the following:

[0314] MBS, unicast service, machine type communication, sensing type communication.

[0315] For example, if SSB1 supports service type 1 (e.g., MBS) and SSB2 supports service type 2 (e.g., unicast service), when the terminal needs to send type 1 service, then select the SRS associated with the type 1 SSB (i.e., SSB1).

[0316] Embodiments 1-9: Select the type of SRS according to the access state supported by the downlink reference signal / frequency point associated with the SRS.

[0317] In some embodiments, the access states supported by different downlink reference signals / frequency points can be configured. Optionally, the access states supported by the downlink reference signals / frequency points can be specified by the protocol or configured by the network-side device, such as through MIB or SIB configuration.

[0318] In some embodiments, the terminal can select the downlink reference signal that supports this access state according to a preset rule (e.g., the current access state of the terminal), and further select the SRS resource associated with the downlink reference signal.

[0319] Exemplarily, the access states supported by the downlink reference signal / frequency point may include, but are not limited to, at least one of the following:

[0320] Barred state, power saving state, network busy / overload state.

[0321] For example, if SSB1 supports access state 1 and SSB2 supports access state 2, when the terminal needs to enter access state 1, then the terminal selects the SRS associated with the SSB that supports access state 1 (i.e., SSB1).

[0322] Embodiment 1-9: Select the type of SRS according to the bandwidth information of the terminal.

[0323] In some embodiments, the bandwidth information of the terminal includes at least one of the SRS resource type information supported by the terminal under the target bandwidth and whether the terminal supports a duplex mode.

[0324] In some embodiments, the target bandwidth may be the bandwidth configured by the network side device for the terminal.

[0325] For example, if the terminal only supports Type B SRS under the target bandwidth, or does not support a duplex mode (such as the SBFD mode), then the terminal may select Type B SRS, that is, the SRS located in the UL time unit.

[0326] Embodiment 1-10: Select the type of SRS according to the carrier information of the terminal.

[0327] In some embodiments, the carrier information of the terminal includes at least one of the SRS type information supported by the terminal under the target carrier and whether the terminal supports a duplex mode.

[0328] In some embodiments, the target carrier may be the carrier configured by the network side device for the terminal.

[0329] For example, if the terminal only supports Type B SRS under the target carrier, or does not support a duplex mode (such as the SBFD mode), then the terminal may select Type B SRS, that is, the SRS resource located in the UL time unit.

[0330] Embodiment 1-11: Select the type of SRS according to the BWP information of the terminal.

[0331] In some embodiments, the BWP information of the terminal includes at least one of the SRS type information supported by the terminal under the target BWP and whether the terminal supports a duplex mode.

[0332] In some embodiments, the target BWP may be a BWP configured by a network-side device for a terminal, or the currently active BWP.

[0333] For example, if the terminal only supports Type B SRS under the target BWP, or does not support the duplex mode (such as the SBFD mode), then the terminal may select Type B SRS, that is, the SRS resource located in the UL time unit.

[0334] Embodiment 1-12: Select the SRS type according to the capability information of the terminal.

[0335] In some embodiments, the capability information of the terminal may include the SRS type information supported by the terminal and / or whether the terminal supports the duplex mode.

[0336] For example, if the network-side device configures Type A SRS and Type B SRS for the terminal, and the terminal does not support SBFD, then when the terminal selects the SRS type, it may only allow the use of the SRS located in the UL time unit, so Type B SRS can be selected.

[0337] It should be understood that the above Embodiment 1-1 to Embodiment 1-12 can be implemented separately or in combination, and the present application does not limit this. For example, the terminal may select the SRS of the target type according to the capability information of the terminal and the priority of the SRS type. Exemplarily, the SRS type with the highest priority is selected from the SRS types supported by the terminal. For another example, the terminal may also select the SRS of the target type according to the measurement of the downlink reference signal associated with the SRS and the order of the SRS resources. Exemplarily, if there are multiple measurements of the downlink reference signal associated with the SRS that are all greater than the measurement threshold, the SRS of the target type may be selected according to the order of the time-frequency resources where the multiple SRSs are located. For example, the earliest SRS in the time domain is selected as the SRS of the target type.

[0338] It should be noted that the above selection methods of the SRS type are only examples, and the terminal may also select the SRS type in combination with other information, and the present application does not limit this. For example, different types of SRS are used for the initial transmission and retransmission of the SRS respectively. For example, a specific type of SRS, such as Type B SRS, is used for the initial transmission of the SRS, which can reduce the impact of self-interference and / or cross-link interference and improve the reliability of the initial transmission of the SRS.

[0339] In some embodiments, the initial transmission of the SRS may include at least one of the following:

[0340] The first transmission without power ramping;

[0341] The first transmission that is not instructed to perform a retransmission;

[0342] The first transmission that includes a retransmission.

[0343] In some embodiments, for the retransmission of the SRS, the terminal may increase the transmission power of the SRS according to the configuration of the network device or a predefined rule, and the increase amplitude may be configured by the network device.

[0344] In some embodiments of the present application, S202 includes:

[0345] The terminal sends the SRS of the target type using X spatial relation information (SpatialRelationInfo).

[0346] In some embodiments, the terminal supports X spatial relation information, and the network device may indicate Y spatial relation information to the terminal, where X ≤ Y. Then, the terminal may select X spatial relation information from the Y spatial relation information according to a preset rule (for example, in a predefined order) for sending the SRS. For example, the X spatial relation information is used to send the SRS of the target type on X consecutive SRS occasions. Among them, the SRSs sent on different SRS occasions are sent using different spatial relation information.

[0347] In some embodiments, the spatial relation information or spatial configuration (spatial setting).

[0348] In some embodiments, the spatial relation information includes at least one of the following:

[0349] Beam information, reference signal set information, transmission configuration indicator (TCI) status information, antenna panel information, control resource set group (coresetPoolIndex) information.

[0350] In some embodiments of the present application, the method 200 further includes:

[0351] Determine whether to switch from sending the SRS of the first type to sending the SRS of the second type according to the second information;

[0352] Wherein, the second information includes at least one of the following:

[0353] The first timer corresponding to the SRS of the first type;

[0354] The number of transmissions corresponding to the SRS of the first type;

[0355] The validity of the SRS of the first type;

[0356] The measurement quantity of the downlink reference signal associated with the SRS of the first type;

[0357] The validity of the timing advance TA corresponding to the SRS of the first type;

[0358] Whether the SRS of the first type overlaps with the associated downlink reference signal or the common DL channel;

[0359] The transmission power of the terminal;

[0360] The frequency interval between the uplink transmission and the downlink reception of the terminal;

[0361] The number of transmissions of the activation request signaling of the SRS of the first type.

[0362] Wherein, the SRS of the first type is the SRS type currently selected by the terminal, and the SRS of the second type is other types of SRSs other than the first type, which is not limited in this application.

[0363] It should be understood that in the embodiments of this application, switching from transmitting the SRS of the first type to transmitting the SRS of the second type can be replaced by: switching from using the SRS resources of the first type (or rather, the SRS resource configuration of the first type) to using the SRS resources of the second type (or rather, the SRS resource configuration of the second type). Among them, the SRS transmitted on the SRS resources of the first type (or rather, using the SRS resource configuration of the first type) is the SRS of the first type, and the SRS transmitted on the SRS resources of the second type (or rather, using the SRS resource configuration of the second type) is the SRS of the second type.

[0364] That is to say, determining whether to switch from transmitting the SRS of the first type to transmitting the SRS of the second type according to the second information can be replaced by:

[0365] Determining whether to switch from using the SRS resources of the first type to using the SRS resources of the second type according to the second information; or,

[0366] Determining whether to switch from using the SRS resource configuration of the first type to the SRS resource configuration of the second type according to the second information.

[0367] In other words, the terminal can perform switching of the SRS, or switching of the SRS resources, or switching of the SRS resource configuration according to the second information.

[0368] In some embodiments, determining whether to switch from transmitting the SRS resources of the first type to transmitting the SRS resources of the second type according to the second information includes:

[0369] When the first condition is satisfied, it is determined to switch from transmitting the first type of SRS to transmitting the second type of SRS; wherein, the first condition includes at least one of the following:

[0370] The first timer corresponding to the first type of SRS expires;

[0371] The transmission count of the first type of SRS reaches the transmission count threshold of the SRS;

[0372] The TA corresponding to the first type of SRS is invalid, and the TA corresponding to the second type of SRS is valid;

[0373] The first type of SRS overlaps with the associated downlink reference signal or the common downlink channel;

[0374] The transmission power of the terminal is greater than the preset power threshold;

[0375] The measurement quantity of the downlink reference signal associated with the first type of SRS is less than the measurement quantity threshold;

[0376] The frequency interval between the uplink transmission and the downlink reception of the terminal is less than the frequency interval threshold;

[0377] The transmission count of the activation request signaling for the first type of SRS reaches the transmission count threshold of the activation request signaling.

[0378] In some embodiments, determining whether to switch from transmitting the first type of SRS resource to transmitting the second type of SRS resource according to the second information includes:

[0379] When the first condition is not satisfied, it is determined not to switch from transmitting the first type of SRS to transmitting the second type of SRS.

[0380] For example, if the first condition includes that the first timer corresponding to the first type of SRS expires, the terminal may switch from transmitting the first type of SRS to transmitting the second type of SRS when the first timer corresponding to the first type of SRS expires; or, when the first timer corresponding to the first type of SRS does not expire, no SRS type switching is performed, that is, the first type of SRS continues to be transmitted.

[0381] For another example, if the first condition includes that the first timer corresponding to the first type of SRS expires and the transmission count of the first type of SRS reaches the SRS transmission count threshold, then the terminal may switch from transmitting the first type of SRS to transmitting the second type of SRS when the first timer corresponding to the first type of SRS expires and the transmission count of the first type of SRS reaches the SRS transmission count threshold; or, if the first timer corresponding to the first type of SRS does not expire or the transmission count of the first type of SRS does not reach the SRS transmission count threshold, no SRS type switch is performed, that is, the first type of SRS continues to be transmitted.

[0382] Two examples of the first condition are given above. When the first condition is the above-mentioned other conditions or a combination of other conditions, the implementation method is similar and will not be elaborated here.

[0383] In some embodiments, determining whether to switch from using the first type of SRS to using the second type of SRS according to the second information includes:

[0384] When the second condition is satisfied, it is determined not to switch from transmitting the first type of SRS to transmitting the second type of SRS: where the second condition includes at least one of the following:

[0385] The first timer corresponding to the first type of SRS has not expired;

[0386] The transmission count of the first type of SRS has not reached the transmission count threshold;

[0387] The TA corresponding to the first type of SRS is valid;

[0388] The first type of SRS does not overlap with the associated downlink reference signal or the common downlink channel;

[0389] The transmission power of the terminal is less than the preset power threshold;

[0390] The measurement of the downlink reference signal associated with the first type of SRS is greater than the measurement threshold;

[0391] The frequency interval between the uplink transmission and the downlink reception of the terminal is greater than the frequency interval threshold;

[0392] The transmission count of the activation request signaling of the first type of SRS has not reached the transmission count threshold.

[0393] In some embodiments, determining whether to switch from transmitting the first type of SRS resource to transmitting the second type of SRS resource according to the second information includes:

[0394] When the second condition is not satisfied, it is determined to switch from transmitting the first type of SRS to transmitting the second type of SRS.

[0395] For example, if the second condition includes that the first timer corresponding to the first type of SRS has not timed out, the terminal can switch from transmitting the first type of SRS to transmitting the second type of SRS when the first timer corresponding to the first type of SRS times out; or, when the first timer corresponding to the first type of SRS has not timed out, no SRS type switch is made, that is, the first type of SRS continues to be transmitted.

[0396] Another example is that the second condition includes that the first timer corresponding to the first type of SRS has not timed out and the transmission count of the first type of SRS has not reached the SRS transmission count threshold. Then, when the first timer corresponding to the first type of SRS has not timed out and the transmission count of the first type of SRS has not reached the SRS transmission count threshold, no SRS type switch is made, that is, the first type of SRS continues to be transmitted; or, when the first timer corresponding to the first type of SRS times out or the transmission count of the first type of SRS reaches the SRS transmission count threshold, the terminal switches from transmitting the first type of SRS to transmitting the second type of SRS.

[0397] Two examples of the second condition are given above. When the second condition is the above other conditions or a combination of other conditions, the implementation method is similar and will not be elaborated here.

[0398] In the embodiments of the present application, when the terminal switches to an SRS resource, it can be considered that the SRS resource is activated. Therefore, the switching condition of the SRS resource can also be considered as the activation condition of the SRS resource.

[0399] Next, in combination with Embodiment 2, the SRS switching method will be described.

[0400] Embodiment 2-1: Perform SRS switching according to the overlap situation between the SRS and the associated downlink reference signal or the common DL channel.

[0401] For example, if the terminal currently selects to transmit the first type of SRS (e.g., Type A SRS), the first type of SRS is associated with a first downlink reference signal, but the first type of SRS resource overlaps with a second downlink reference signal or a common DL channel, or the first type of SRS overlaps with the first downlink reference signal. Among them, the terminal needs to use the second downlink reference signal for measurement or needs to receive the common DL channel to obtain key information. In this case, the terminal can directly select to switch to the second type of SRS, or can also further determine whether to continue transmitting the first type of SRS or switch to transmitting the second type of SRS (e.g., Type B SRS) according to other information (such as the transmission power of the terminal, the frequency interval between the uplink transmission and the downlink reception of the terminal).

[0402] In some embodiments, when at least one of the following conditions is met, the terminal selects to continue transmitting the first type of SRS, that is, does not perform SRS switching:

[0403] The transmission power of the terminal is less than the reference transmission power threshold;

[0404] The frequency interval between the uplink transmission and the downlink reception of the terminal is greater than the frequency interval threshold.

[0405] When the transmission power of the terminal is less than the reference transmission power threshold, it indicates that the self-interference and / or cross-link interference caused by the terminal transmitting the first type of SRS is low. Therefore, the terminal can choose to continue transmitting the first type of SRS.

[0406] When the frequency interval between the uplink transmission and the downlink reception of the terminal is greater than the frequency interval threshold, it indicates that the influence of the terminal's uplink transmission on the downlink reception is small. Therefore, the terminal can choose to continue transmitting the first type of SRS.

[0407] Optionally, the reference transmission power threshold can be specified by the protocol or configured by the network-side device.

[0408] In some embodiments, when at least one of the following conditions is met, the terminal switches to transmitting the second type of SRS:

[0409] The transmission power of the terminal is greater than the reference transmission power threshold;

[0410] The frequency interval between the uplink transmission and the downlink reception of the terminal is less than the frequency interval threshold.

[0411] When the transmission power of the terminal is greater than the reference transmission power threshold, it indicates that the influence of the terminal's uplink transmission on the downlink reception is large. Then the terminal selects to switch to the second type of SRS resource, which is beneficial to reducing the self-interference and / or cross-link interference caused by the terminal's SRS transmission.

[0412] When the frequency interval between the uplink transmission and the downlink reception of the terminal is less than the frequency interval threshold, it indicates that the uplink transmission of the terminal has a greater impact on the downlink reception. Therefore, when the terminal selects to switch to the second type of SRS, the self-interference and / or cross-link interference caused by the SRS transmission of the terminal can be reduced.

[0413] Embodiment 2-2: Perform SRS switching according to the effectiveness of SRS.

[0414] It can be understood that when a type of SRS is invalid, when transmitting this type of SRS, the network-side device cannot correctly receive it, so the purpose of this SRS cannot be achieved.

[0415] In some embodiments, the effectiveness of SRS can be defined according to the time-frequency resource position where the SRS is located.

[0416] For example, if an SRS overlaps with both UL symbols and DL symbols, then this SRS is an invalid SRS.

[0417] Another example is that if an SRS overlaps with a UL sub-band and UL symbols, then this SRS is a valid SRS.

[0418] In some embodiments, the effectiveness of SRS can be defined according to the interference situation of SRS on other links.

[0419] For example, if the frequency interval between an SRS and the GB is less than a preset frequency interval threshold, in this case, this SRS will interfere with other links, and this SRS is considered an invalid SRS.

[0420] Another example is that if the frequency interval between an SRS and the GB is greater than a preset frequency interval threshold, in this case, the interference of this SRS on other links is relatively small, and this SRS is considered a valid SRS.

[0421] Another example is that if an SRS overlaps with the GB of the network-side device in full duplex, in this case, the network-side device cannot correctly receive this SRS, then this SRS is considered an invalid SRS.

[0422] Another example is that if an SRS overlaps with the GB of the terminal side in full duplex, in this case, this SRS will interfere with its own DL reception (if any), then this SRS is considered an invalid SRS.

[0423] In some embodiments, if the first type of SRS is an invalid SRS and the second type of SRS is a valid SRS, then the terminal can determine to switch from transmitting the first type of SRS to transmitting the second type of SRS.

[0424] Embodiment 2-3: Perform SRS switching according to the effectiveness of the TA corresponding to SRS.

[0425] In some embodiments, different types of SRSs are associated with different sets of measurement signals (e.g., SSB). The validity of the TA of an SRS can be determined by measuring the measurement signals in the associated set of measurement signals. Since the sets of measurement signals associated with different types of SRSs may be different, the obtained TAs may also be different, and thus the validity of the TAs may also be different. Therefore, the SRS resources can be selected according to the TA validity of the SRS resources, which is beneficial to ensuring the uplink transmission performance.

[0426] For example, if the terminal is currently transmitting a first type of SRS, and at a certain moment, the TA corresponding to the first type of SRS becomes invalid, but the TA corresponding to the second type of SRS is valid, in this case, the terminal can switch to transmitting the second type of SRS.

[0427] Optionally, when the TAs corresponding to the at least one type of SRS are all invalid, the terminal determines that the beam management for non - connected state (beamManagementForNonConnected) fails and stops transmitting the SRS.

[0428] In this case, the beam used by the terminal to send Msg1 or Msg3 etc. in the random access process can be determined by the terminal, for example, randomly select a beam.

[0429] Optionally, when at least one of the following conditions is met, the TA validity of the SRS is determined:

[0430] The RSRP of the stored DL reference signal and the RSRP of the currently used DL downlink reference signal are valid;

[0431] Compared with the RSRP of the stored DL reference signal, the change amount of the RSRP of the currently calculated DL reference signal is less than or equal to a preset threshold, and this preset threshold can be specified by the protocol or configured by the network - side device;

[0432] A predefined timer is running. For example, the timer for timing alignment (SRS - TimeAlignmentTimer) is running, indicating that the TA of the SRS corresponding to this timer is valid. After this timer times out, the TA corresponding to this SRS becomes invalid.

[0433] Embodiments 2 - 4: Perform SRS switching according to the measurement quantity of the downlink reference signal associated with the SRS.

[0434] Optionally, the network - side device can configure different downlink reference signals (such as SSB) for Type A SRS and Type B SRS.

[0435] For example, if the terminal is currently using Type A SRS, and the measurement value (such as SS-RSRP) of the downlink reference signal (such as SSB1) associated with Type A SRS is less than the second measurement threshold, but the measurement value (such as SS-RSRP) of the downlink reference signal (SSB2) associated with Type B SRS is greater than the second measurement threshold, in this case, it can be considered that for the terminal side, the reception quality of the downlink reference signal associated with Type B SRS is better. Therefore, the terminal can switch the SRS from Type A SRS associated with SSB1 to Type B SRS associated with SSB2. Among them, the second measurement threshold can be predefined or configured by the network side device.

[0436] For another example, if the terminal is currently using Type A SRS and the measurement value (such as SS-RSRP) of the downlink reference signal (such as SSB1) associated with Type A SRS is greater than the second measurement threshold, in this case, the terminal can not perform the SRS switch.

[0437] In some scenarios, the terminal may have mobility, and then the measurement value of the downlink reference signal measured by the terminal may change. Through this method, the terminal side can select the downlink reference signal with better signal quality for access, which is beneficial to the reception of DL channels / signals and UL channels / signals.

[0438] Optionally, when the measurement values of the downlink reference signals associated with the at least one type of SRS are all less than the second measurement threshold, the terminal determines that the beam management for non-connected state fails and stops sending SRS. In this case, the beam used by the terminal to send Msg1 or Msg3 etc. in the random access process can be determined by the terminal, for example, randomly select a beam.

[0439] Embodiment 2-5: Perform the SRS switch according to the first timer corresponding to SRS (i.e., the SRS detection failure timer).

[0440] In some embodiments, the at least one type of SRS is respectively configured with a corresponding first timer for receiving the response of the network side device to the SRS after sending the SRS.

[0441] For example, if the terminal currently selects the first type of SRS, after the terminal sends the first type of SRS, the first timer starts. When the first timer times out and the terminal does not receive the response of the network side device to the SRS, it is determined to perform the SRS switch, for example, switch to the second type of SRS. Or, if the terminal receives the response of the network side device to the SRS before the first timer times out, continue to use the first type of SRS.

[0442] Embodiment 2-6: Perform SRS handover according to the number of transmissions or transmission time of the SRS.

[0443] In some embodiments, each type of SRS in the at least one type respectively corresponds to a transmission number threshold or a transmission time threshold. The transmission number thresholds or transmission time thresholds corresponding to different types of SRSs may be the same, or may be different.

[0444] For example, if the terminal currently selects the first type of SRS, when the number of transmissions of the first type of SRS reaches the transmission number threshold, or when the transmission time of the first type of SRS reaches the transmission time threshold, it is determined to perform SRS handover, for example, handover to the second type of SRS. Or, if the number of transmissions of the first type of SRS does not reach the transmission number threshold, or when the transmission time of the first type of SRS reaches the transmission time threshold, the terminal may continue to use the first type of SRS.

[0445] Embodiment 2-7: Perform SRS handover according to the number of transmissions of the activation request signaling of the SRS resource.

[0446] In some embodiments, the activation request signaling of each type of SRS resource respectively corresponds to a transmission number threshold. The transmission number thresholds corresponding to the activation request signaling of different types of SRS resources may be the same, or may be different. The transmission number threshold of the activation request signaling may be specified by the protocol or configured by the network side device.

[0447] For example, the terminal requests the activation of the SRS resource through the activation request signaling. If the terminal currently selects the first type of SRS resource, when the number of transmissions of the activation request signaling of the first type of SRS resource exceeds or is not less than the transmission number threshold of the activation request signaling, the terminal switches to another type of SRS resource, for example, the second type of SRS resource. Or, if the number of transmissions of the activation request signaling of the first type of SRS resource is less than or not greater than the transmission number threshold of the activation request signaling, the terminal may continue to use the first type of SRS resource.

[0448] Embodiment 2-8: Perform SRS handover according to the time period of the SRS resource.

[0449] For example, each type of SRS resource corresponds to a corresponding time period (or, the valid time), and the terminal can perform SRS switching according to the time period corresponding to the SRS resource. For example, within the time period corresponding to a type of SRS resource, this type of SRS resource is preferentially selected. Optionally, the time period corresponding to each type of SRS resource can be predefined or configured by the network side device. Optionally, the lengths of the time periods corresponding to each type of SRS resource can be the same or different.

[0450] Optionally, the terminal can sequentially use the at least one type of SRS resource in a certain order, where each type of SRS resource corresponds to a certain time period.

[0451] Optionally, the time period can be a PRACH configuration period. For example, within a time period (such as a PRACH configuration period), the terminal selects a Type B SRS resource to send SRS. When the terminal fails to successfully receive Msg2 and enters the next time period, the terminal selects the SRS resource type corresponding to the next time period, for example, preferentially selects the first available SRS resource in this SRS resource type.

[0452] It should be noted that the above SRS type switching methods are only examples, and the terminal can also perform SRS type switching in combination with other information, which is not limited in this application. For example, the terminal currently selects the first type of SRS. Further, under preset conditions, the terminal can switch from the first type of SRS to the second type of SRS. Among them, the first type of SRS is associated with a first downlink reference signal, the second type of SRS is associated with a second downlink reference signal, the first downlink reference signal corresponds to a first priority, the second downlink reference signal corresponds to a second priority, and the first priority is higher than the second priority. Or, the type of the first downlink reference signal is type X, and the type of the second downlink reference signal is type Y. Or, the first downlink reference signal supports a first service type, and the second downlink reference signal supports a second service type. Or, the first downlink reference signal supports a first access state, and the second downlink reference signal supports a second access state. This is beneficial for the terminal to support multiple service types or access state types at the same time. The terminal can switch to an appropriate SRS type according to the current service type / access state type, etc.

[0453] Optionally, the preset conditions can include, for example, but are not limited to at least one of the following:

[0454] The TA corresponding to the first type of SRS fails;

[0455] The number of transmissions of the first type of SRS reaches the transmission number threshold;

[0456] The first timer corresponding to the first type of SRS expires;

[0457] The measurement value of the first downlink reference signal is less than the measurement threshold.

[0458] In some embodiments, it can also be considered that when the foregoing first condition is met, the first type of SRS resource is deactivated and the second type of SRS resource is deactivated. That is, the first condition can be considered as the deactivation condition of the first type of SRS resource and the activation condition of the second type of SRS resource.

[0459] In some embodiments of the present application, the method 200 further includes:

[0460] When the third condition is met, the terminal determines that the beam management in the non-connected state fails and stops transmitting SRS:

[0461] Wherein, the third condition includes at least one of the following:

[0462] The first timers corresponding to the at least one type of SRS resources all expire;

[0463] The count values of the first calculators corresponding to the at least one type of SRS resources all reach the transmission count threshold;

[0464] The TAs corresponding to the at least one type of SRS resources are all valid;

[0465] The measurement values of the reference signals associated with the at least one type of SRS resources are all less than the third measurement threshold.

[0466] In this case, the beam used by the terminal to send Msg1 or Msg3, etc. in the random access process can be determined by the terminal, for example, randomly select a beam.

[0467] In the embodiments of the present application, the first measurement threshold, the second measurement threshold, and the third measurement threshold may be the same, or may be different.

[0468] In summary, in the embodiments of the present application, at least one type of SRS corresponding SRS resources can be configured, where the SRS resources include at least one of the following: the uplink sub-band within the downlink time unit; the flexible time unit; the uplink sub-band within the flexible time unit; the non-downlink sub-band within the flexible time unit; the uplink time unit; the non-downlink sub-band within the uplink time unit. The terminal can send SRS based on the SRS resources, so as to realize SRS transmission in the duplex mode, improve the system resource utilization rate, and reduce the SRS transmission delay.

[0469] As described above in conjunction with Figures 6 to 14 ., the method embodiments of the present application are described in detail. Below in conjunction with Figures 15 to 19, the device embodiments of the present application will be described in detail. It should be understood that the device embodiments correspond to the method embodiments, and similar descriptions can refer to the method embodiments.

[0470] The method for configuring SRS in a duplex mode provided by the embodiments of the present application may be executed by a device for configuring SRS in a duplex mode. In the embodiments of the present application, taking the device for configuring SRS in a duplex mode to execute the method for configuring SRS in a duplex mode as an example, the device for configuring SRS in a duplex mode provided by the embodiments of the present application is described.

[0471] Figure 15 FIG. shows a schematic block diagram of a device 500 for configuring SRS in a duplex mode according to an embodiment of the present application. As Figure 15 shown, the device 500 includes:

[0472] A communication unit 510, configured to receive first configuration information from a network-side device, where the first configuration information is used to configure SRS resources corresponding to at least one type of sounding reference signal SRS; and

[0473] Transmit the SRS according to the SRS resources; where the SRS resources include at least one of the following:

[0474] An uplink sub-band within a downlink time unit;

[0475] A flexible time unit;

[0476] An uplink sub-band within a flexible time unit;

[0477] A non-downlink sub-band within a flexible time unit;

[0478] An uplink time unit;

[0479] A non-downlink sub-band within an uplink time unit.

[0480] In some embodiments, the at least one type of SRS includes at least one of the following types:

[0481] SRS located on different frequency-domain resources;

[0482] SRS that needs to be activated;

[0483] SRS that does not need to be activated;

[0484] SRS for different service types;

[0485] SRS for different purposes;

[0486] SRS for different terminal types;

[0487] SRS on a flexible time unit;

[0488] SRS overlapping with downlink reference signal resources;

[0489] SRS not overlapping with downlink reference signal resources;

[0490] SRS on uplink subbands;

[0491] SRS on uplink time units.

[0492] In some embodiments, the communication unit 510 is further configured to:

[0493] When the time-domain resource where the SRS is located is a flexible time unit, and no uplink subband is configured on the flexible time unit but a downlink subband is configured, send the SRS on the time-frequency resources outside the downlink subband on the flexible time unit; or

[0494] When the time-domain resource of the SRS is a flexible time unit and an uplink subband is configured on the flexible time unit, send the SRS on the uplink subband on the flexible time unit; or

[0495] When the time-domain resource of the SRS is a flexible time unit and neither an uplink subband nor a downlink subband is configured on the flexible time unit, send the SRS on the time-frequency resources on the flexible time unit.

[0496] In some embodiments, the apparatus 500 further includes:

[0497] A processing unit, configured to select a target type of SRS for transmission from the at least one type of SRS according to first information;

[0498] Wherein, the first information includes at least one of the following:

[0499] Measurement quantity of downlink reference signals;

[0500] Order of SRS resources corresponding to the at least one type of SRS;

[0501] Whether the SRS resources corresponding to the at least one type of SRS are activated or deactivated;

[0502] Priority of the at least one type of SRS;

[0503] Information of downlink reference signals associated with the at least one type of SRS;

[0504] Bandwidth information of the terminal;

[0505] Carrier information of the terminal;

[0506] Bandwidth part BWP information of the terminal;

[0507] The capability information of the terminal;

[0508] The access status of the terminal;

[0509] The service type of the service to be transmitted by the terminal.

[0510] In some embodiments, the order of the SRS resources corresponding to the at least one type of SRS includes at least one of the following:

[0511] The time order of the SRS resources, the frequency order of the SRS resources.

[0512] In some embodiments, the information of the downlink reference signal associated with the at least one type of SRS includes at least one of the following:

[0513] Whether the downlink reference signal associated with the at least one type of SRS is valid or invalid;

[0514] The priority of the downlink reference signal or frequency point associated with the at least one type of SRS;

[0515] The type of the downlink reference signal or frequency point associated with the at least one type of SRS;

[0516] The service type supported by the downlink reference signal or frequency point associated with the at least one type of SRS;

[0517] The access status supported by the downlink reference signal or frequency point associated with the at least one type of SRS.

[0518] In some embodiments, the bandwidth information of the terminal includes at least one of the SRS type information supported by the terminal under the target bandwidth and whether the terminal supports the duplex mode; or

[0519] The carrier information of the terminal includes at least one of the SRS type information supported by the terminal under the target carrier and whether the terminal supports the duplex mode; or

[0520] The BWP information of the terminal includes at least one of the SRS type information supported by the terminal under the target BWP and whether the terminal supports the duplex mode; or

[0521] The capability information of the terminal includes at least one of the SRS type information supported by the terminal and whether the terminal supports the duplex mode.

[0522] In some embodiments, the at least one type of SRS has the following association relationship with the downlink reference signal:

[0523] A downlink reference signal is associated with at least one SRS on an uplink time unit and one SRS on an uplink subband.

[0524] In some embodiments, each type of SRS in the at least one type corresponds to a transmission count threshold of the SRS; or

[0525] Each type of SRS in the at least one type corresponds to a first timer for determining a maximum time length for receiving a response from the network device to the transmitted SRS.

[0526] In some embodiments, the apparatus 500 further includes:

[0527] A processing unit, configured to determine whether to switch from transmitting a first type of SRS to transmitting a second type of SRS according to second information, where the first type is the SRS type currently selected by the terminal;

[0528] Wherein the second information includes at least one of the following:

[0529] The first timer corresponding to the first type of SRS;

[0530] The transmission count of the first type of SRS;

[0531] The validity of the timing advance TA corresponding to the first type of SRS;

[0532] Whether the first type of SRS overlaps with an associated downlink reference signal or a common downlink channel;

[0533] The measurement value of the downlink reference signal associated with the first type of SRS;

[0534] The transmission power of the terminal;

[0535] The frequency interval between the uplink transmission and the downlink reception of the terminal;

[0536] The transmission count of the activation request signaling of the first type of SRS.

[0537] In some embodiments, the processing unit is further configured to:

[0538] When a first condition is satisfied, determine to switch from transmitting a first type of SRS to transmitting a second type of SRS; where the first condition includes at least one of the following:

[0539] The first timer corresponding to the first type of SRS expires;

[0540] The transmission count of the first type of SRS reaches the transmission count threshold of the SRS;

[0541] The TA corresponding to the SRS of the first type is invalid, and the TA corresponding to the SRS of the second type is valid;

[0542] The SRS of the first type overlaps with the associated downlink reference signal or the common downlink channel;

[0543] The transmission power of the terminal is greater than a preset power threshold;

[0544] The measurement quantity of the downlink reference signal associated with the SRS of the first type is less than the measurement quantity threshold;

[0545] The frequency interval between the uplink transmission and the downlink reception of the terminal is less than the frequency interval threshold;

[0546] The number of transmissions of the activation request signaling for the SRS of the first type reaches the threshold of the number of transmissions of the activation request signaling.

[0547] In some embodiments, the processing unit is further configured to:

[0548] When a second condition is satisfied, determine not to switch from transmitting the SRS of the first type to transmitting the SRS of the second type: wherein, the second condition includes at least one of the following:

[0549] The first timer corresponding to the SRS of the first type has not timed out;

[0550] The number of transmissions of the SRS of the first type has not reached the transmission number threshold;

[0551] The TA corresponding to the SRS of the first type is valid;

[0552] The SRS of the first type does not overlap with the associated downlink reference signal or the common downlink channel;

[0553] The transmission power of the terminal is less than the preset power threshold;

[0554] The measurement quantity of the downlink reference signal associated with the SRS of the first type is greater than the measurement quantity threshold;

[0555] The frequency interval between the uplink transmission and the downlink reception of the terminal is greater than the frequency interval threshold;

[0556] The number of transmissions of the activation request signaling for the SRS of the first type has not reached the transmission number threshold.

[0557] In some embodiments, the priorities of the downlink reference signals associated with the SRS of the first type and the SRS of the second type are different; or

[0558] The types of the downlink reference signals associated with the SRS of the first type and the SRS of the second type are different; or

[0559] The service types supported by the downlink reference signals associated with the first type of SRS and the second type of SRS are different; or

[0560] The access states supported by the downlink reference signals associated with the first type of SRS and the second type of SRS are different.

[0561] In some embodiments, the processing unit is further configured to:

[0562] When a third condition is satisfied, the terminal determines that beam management in the non-connected state fails and determines to stop transmitting SRS:

[0563] Wherein, the third condition includes at least one of the following:

[0564] The first timers corresponding to the at least one type of SRS all expire;

[0565] The transmission times of the at least one type of SRS all reach the corresponding transmission time thresholds;

[0566] The TAs corresponding to the at least one type of SRS are all valid;

[0567] The measurement values of the reference signals associated with the at least one type of SRS are all less than the measurement value threshold.

[0568] In some embodiments, the first configuration information is further configured to configure at least one of the following:

[0569] The uses of the at least one type of SRS;

[0570] The periods of the at least one type of SRS;

[0571] The association relationships between the at least one type of SRS and the response sequences;

[0572] The time-frequency resource information of the response sequences corresponding to the at least one type of SRS.

[0573] Optionally, in some embodiments, the above communication unit may be a communication interface or a transceiver, or an input / output interface of a communication chip or a system-on-chip.

[0574] It should be understood that the apparatus 500 according to the embodiments of the present application may correspond to the terminal in the method embodiments of the present application, and the above and other operations and / or functions of each unit in the apparatus 500 are respectively for implementing Figures 6 to 14 the corresponding processes of the terminal in the method embodiments shown, and achieve the same technical effects. To avoid repetition, they are not described herein again.

[0575] Figure 16The schematic block diagram of the SRS configuration device 600 in the duplex mode according to an embodiment of the present application is shown. As Figure 16 shown, the device 600 includes:

[0576] A communication unit 610, configured to send first configuration information to a terminal, where the first configuration information is used to configure SRS resources corresponding to at least one type of SRS;

[0577] Wherein, the SRS resources include at least one of the following:

[0578] An uplink sub-band within a downlink time unit;

[0579] A flexible time unit;

[0580] An uplink sub-band within a flexible time unit;

[0581] A non-downlink sub-band within a flexible time unit;

[0582] An uplink time unit;

[0583] A non-downlink sub-band within an uplink time unit.

[0584] In some embodiments, the at least one type of SRS includes at least one of the following types:

[0585] SRSs located on different frequency domain resources;

[0586] SRSs that need to be activated;

[0587] SRSs that do not need to be activated;

[0588] SRSs for different service types;

[0589] SRSs for different purposes;

[0590] SRSs for different terminal types;

[0591] SRSs on a flexible time unit;

[0592] SRSs overlapping with downlink reference signal resources;

[0593] SRSs not overlapping with downlink reference signal resources;

[0594] SRSs on an uplink sub-band;

[0595] SRSs on an uplink time unit.

[0596] In some embodiments, the at least one type of SRS has the following association relationship with the downlink reference signal:

[0597] A downlink reference signal is associated with at least one SRS on an uplink time unit and one SRS on an uplink subband.

[0598] In some embodiments, each type of SRS in the at least one type corresponds to a transmission count threshold of the SRS respectively; or

[0599] Each type of SRS in the at least one type corresponds to a first timer respectively, which is used to determine the maximum time length for receiving a response from the network device to the transmitted SRS.

[0600] Optionally, in some embodiments, the above communication unit may be a communication interface or a transceiver, or an input / output interface of a communication chip or a system-on-chip.

[0601] It should be understood that the apparatus 600 according to the embodiments of the present application may correspond to the network device in the method embodiments of the present application, and the above and other operations and / or functions of each unit in the apparatus 600 are respectively for implementing Figures 6 to 14 the corresponding processes of the network device in the method embodiments shown in, and achieving the same technical effects. To avoid repetition, details are not described herein again.

[0602] In some embodiments, the apparatus 500 and the apparatus 600 in the embodiments of the present application may be electronic devices, such as electronic devices with an operating system, or components in an electronic device, such as an integrated circuit or a chip. The electronic device may be a terminal or other devices other than a terminal. Exemplarily, the terminal may include, but is not limited to, the types of the terminal 11 listed above, and other devices may be a server, a Network Attached Storage (NAS), etc. The embodiments of the present application do not make specific limitations.

[0603] As Figure 17 shown, the embodiments of the present application further provide a communication device 1000, including a processor 1001 and a memory 1002. A program or instruction that can run on the processor 1001 is stored on the memory 1002. For example, when the communication device 1000 is a terminal, the steps performed by the terminal in the above inference method embodiments are implemented when the program or instruction is executed by the processor 1001, and the same technical effects can be achieved. For example, when the communication device 1000 is a network device, the steps performed by the network device in the above inference method embodiments are implemented when the program or instruction is executed by the processor 1001, and the same technical effects can be achieved.

[0604] The embodiments of the present application further provide a terminal, including a processor and a communication interface. The communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement as Figures 6 to 14Steps in the method embodiments shown. This terminal embodiment corresponds to the above terminal-side method embodiments. Each implementation process and realization method of the above method embodiments can be applied to this terminal embodiment and can achieve the same technical effects. Specifically, Figure 18 It is a schematic diagram of the hardware structure of a terminal for implementing an embodiment of the present application.

[0605] The terminal 1100 includes, but is not limited to, at least some components such as a radio frequency unit 1101, a network module 1102, an audio output unit 1103, an input unit 1104, a sensor 1105, a display unit 1106, a user input unit 1107, an interface unit 1108, a memory 1109, and a processor 1110.

[0606] Those skilled in the art can understand that the terminal 1100 may further include a power supply (such as a battery) for supplying power to each component. The power supply can be logically connected to the processor 1110 through a power management system, so as to realize functions such as management of charging, discharging, and power consumption management through the power management system. Figure 18 The terminal structure shown in does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown in the figure, or combine certain components, or have different component arrangements, which will not be elaborated here.

[0607] It should be understood that in the embodiments of the present application, the input unit 1104 may include a graphics processing unit (GPU) 11041 and a microphone 11042. The graphics processor 11041 processes the image data of static pictures or videos obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The display unit 1106 may include a display panel 11061, and the display panel 11061 may be configured in the form of a liquid crystal display, an organic light-emitting diode, etc. The user input unit 1107 includes at least one of a touch panel 11071 and other input devices 11072. The touch panel 11071 is also called a touch screen. The touch panel 11071 may include a touch detection device and a touch controller. The other input devices 11072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, which will not be elaborated here.

[0608] In the embodiments of the present application, after the radio frequency unit 1101 receives downlink data from a network-side device, it can be transmitted to the processor 1110 for processing; in addition, the radio frequency unit 1101 can send uplink data to the network-side device. Generally, the radio frequency unit 1101 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, etc.

[0609] The memory 1109 can be used to store software programs or instructions and various data. The memory 1109 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data. Among them, the first storage area may store an operating system, application programs or instructions required for at least one function (such as a sound playback function, an image playback function, etc.). In addition, the memory 1109 may include a volatile memory or a non-volatile memory. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), a static random access memory (SRAM), a dynamic random access memory (DRAM), a synchronous dynamic random access memory (SDRAM), a double data rate synchronous dynamic random access memory (DDR SDRAM), an enhanced synchronous dynamic random access memory (ESDRAM), a synchronous link dynamic random access memory (SLDRAM), and a direct rambus random access memory (DRRAM). The memory 1109 in the embodiments of the present application includes, but is not limited to, these and any other suitable types of memories.

[0610] The processor 1110 may include one or more processing units; optionally, the processor 1110 integrates an application processor and a modem processor. Among them, the application processor mainly processes operations related to the operating system, user interface, and application programs, etc., and the modem processor mainly processes wireless communication signals, such as a baseband processor. It can be understood that the above-mentioned modem processor may not be integrated into the processor 1110 either.

[0611] It can be understood that the implementation processes of the various implementation manners mentioned in this embodiment can refer to Figures 6 to 14 the relevant descriptions of the method embodiment shown, and achieve the same or corresponding technical effects. To avoid repetition, they will not be elaborated here.

[0612] The embodiments of the present application further provide a network-side device, including a processor and a communication interface. The communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement as Figures 6 to 14The steps of the method embodiments shown. This network-side device embodiment corresponds to the above access network device side or core network function side method embodiments. Each implementation process and implementation manner of the above method embodiments can be applied to this network-side device embodiment and can achieve the same technical effects.

[0613] Specifically, an embodiment of the present application further provides a network-side device. As Figure 19 shown, the network-side device 1200 includes: an antenna 1201, a radio frequency device 1202, a baseband device 1203, a processor 1204, and a memory 1205. The antenna 1201 is connected to the radio frequency device 1202. In the uplink direction, the radio frequency device 1202 receives information through the antenna 1201 and sends the received information to the baseband device 1203 for processing. In the downlink direction, the baseband device 1203 processes the information to be sent and sends it to the radio frequency device 1202. After processing the received information, the radio frequency device 1202 sends it out through the antenna 1201.

[0614] The method executed by the network-side device in the above embodiments can be implemented in the baseband device 1203, and the baseband device 1203 includes a baseband processor.

[0615] The baseband device 1203 may include, for example, at least one baseband board, and a plurality of chips are arranged on the baseband board. As Figure 19 shown, one of the chips is, for example, a baseband processor, which is connected to the memory 1205 through a bus interface to call the program in the memory 1205 and execute the network device operations shown in the above method embodiments.

[0616] The network-side device may further include a network interface 1206, and this interface is, for example, a Common Public Radio Interface (CPRI).

[0617] Specifically, the network-side device 1200 in the embodiment of the present application further includes: instructions or programs stored on the memory 1205 and executable on the processor 1204. The processor 1204 calls the instructions or programs in the memory 1205 to execute Figure 16 the methods executed by the modules shown and achieve the same technical effects. To avoid repetition, it will not be elaborated here.

[0618] An embodiment of the present application further provides a readable storage medium. A program or instructions are stored on the readable storage medium. When the program or instructions are executed by a processor, each process of the above method embodiment for configuring SRS in the duplex mode is implemented, and the same technical effects can be achieved. To avoid repetition, it will not be elaborated here.

[0619] Among them, the processor is the processor in the SRS configuration device, communication device, terminal, and network-side device in the duplex mode described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory ROM, random access memory RAM, magnetic disks, or optical discs. In some examples, the readable storage medium may be a non-transitory readable storage medium.

[0620] Another embodiment of the present application provides a chip, which includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is configured to run programs or instructions to implement each process of the above-described embodiment of the SRS configuration method in the duplex mode, and can achieve the same technical effects. To avoid repetition, it will not be elaborated here.

[0621] It should be understood that the chip mentioned in the embodiments of the present application may also be referred to as a system-on-chip, system chip, chip system, or system-on-chip.

[0622] Another embodiment of the present application provides a computer program / program product, which is stored in a storage medium. The computer program / program product is executed by at least one processor to implement each process of the above-described embodiment of the SRS configuration method in the duplex mode, and can achieve the same technical effects. To avoid repetition, it will not be elaborated here.

[0623] The embodiments of the present application further provide a communication system, including: a terminal and a network-side device. The terminal can be used to execute the steps of the SRS configuration method in the duplex mode as described above, and the network-side device can be used to execute the steps of the SRS configuration method in the duplex mode as described above.

[0624] It should be noted that in this article, the terms "include", "comprise", or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device including a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article, or device including that element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in a reverse order according to the functions involved. For example, the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, the features described with reference to certain examples may be combined in other examples.

[0625] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-described example methods can be implemented by means of a computer software product plus a necessary general hardware platform, and of course, they can also be implemented by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, magnetic disk, optical disk, etc.) and includes several instructions for causing a terminal or a network-side device to execute the methods described in various embodiments of the present application.

[0626] The embodiments of the present application have been described above in conjunction with the accompanying drawings. However, the present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms of embodiments without departing from the purpose of the present application and the scope protected by the claims. These embodiments are all within the protection scope of the present application.

Claims

1. A method for configuring SRS in a duplex mode, characterized in that, it includes: The terminal receives first configuration information from a network-side device, and the first configuration information is used to configure SRS resources corresponding to at least one type of sounding reference signal SRS; The terminal sends the SRS according to the SRS resources; wherein, the SRS resources include at least one of the following: An uplink sub-band within a downlink time unit; A flexible time unit; An uplink sub-band within a flexible time unit; A non-downlink sub-band within a flexible time unit; An uplink time unit; A non-downlink sub-band within an uplink time unit.

2. The method according to claim 1, characterized in that, The at least one type of SRS includes at least one of the following types: SRS located on different frequency-domain resources; SRS that needs to be activated; SRS that does not need to be activated; SRS for different service types; SRS for different purposes; SRS for different terminal types; SRS on a flexible time unit; SRS overlapping with a downlink reference signal resource; SRS not overlapping with a downlink reference signal resource; SRS on an uplink sub-band; SRS on an uplink time unit.

3. The method according to claim 2, characterized in that, The method further includes: When the time-domain resource where the SRS is located is a flexible time unit, and there is no uplink sub-band configured on the flexible time unit but there is a downlink sub-band configured, the terminal sends the SRS on the time-frequency resource outside the downlink sub-band on the flexible time unit; or When the time-domain resource of the SRS is a flexible time unit and there is an uplink sub-band configured on the flexible time unit, the terminal sends the SRS on the uplink sub-band on the flexible time unit; or When the time-domain resource of the SRS is a flexible time unit and there is no uplink sub-band and downlink sub-band configured on the flexible time unit, the terminal sends the SRS on the time-frequency resource on the flexible time unit.

4. The method according to any one of claims 1-3, characterized in that, The method further includes: Selecting a target type of SRS for transmission from the at least one type of SRS according to first information; wherein, the first information includes at least one of the following: The measurement quantity of the downlink reference signal; The order of the SRS resources corresponding to the at least one type of SRS; Whether the SRS resources corresponding to the at least one type of SRS are activated or deactivated; The priority of the at least one type of SRS; The information of the downlink reference signal associated with the at least one type of SRS; The bandwidth information of the terminal; The carrier information of the terminal; The bandwidth part BWP information of the terminal; The capability information of the terminal; The access status of the terminal; The service type of the service to be transmitted by the terminal.

5. The method according to claim 4, characterized in that, The order of the SRS resources corresponding to the at least one type of SRS includes at least one of the following: The time order of the SRS resources, the frequency order of the SRS resources.

6. The method according to claim 4 or 5, characterized in that, The information of the at least one type of SRS-associated downlink reference signal includes at least one of the following: Whether the at least one type of SRS-associated downlink reference signal is effective or ineffective; The priority of the at least one type of SRS-associated downlink reference signal or frequency point; The type of the at least one type of SRS-associated downlink reference signal or frequency point; The service type supported by the at least one type of SRS-associated downlink reference signal or frequency point; The access state supported by the at least one type of SRS-associated downlink reference signal or frequency point.

7. The method according to any one of claims 4 - 6, wherein, the bandwidth information of the terminal includes at least one of the SRS type information supported by the terminal under the target bandwidth and whether the terminal supports a duplex mode; or the carrier information of the terminal includes at least one of the SRS type information supported by the terminal under the target carrier and whether the terminal supports a duplex mode; or the BWP information of the terminal includes at least one of the SRS type information supported by the terminal under the target BWP and whether the terminal supports a duplex mode; or the capability information of the terminal includes at least one of the SRS type information supported by the terminal and whether the terminal supports a duplex mode.

8. The method according to any one of claims 1 - 7, wherein, the at least one type of SRS has the following association relationship with the downlink reference signal: One downlink reference signal is associated with at least one SRS on an uplink time unit or one SRS on an uplink sub-band.

9. The method according to any one of claims 1 - 8, wherein, each type of SRS in the at least one type respectively corresponds to a transmission count threshold of the SRS; or each type of SRS in the at least one type respectively corresponds to a first timer for determining the maximum time length for receiving a response from the network side device to the transmitted SRS.

10. The method according to any one of claims 1 - 9, wherein, the method further includes: determining whether to switch from transmitting the first type of SRS to transmitting the second type of SRS according to second information, where the first type is the SRS type currently selected by the terminal; wherein the second information includes at least one of the following: the first timer corresponding to the first type of SRS; the transmission count of the first type of SRS; the validity of the timing advance TA corresponding to the first type of SRS; whether the first type of SRS overlaps with the associated downlink reference signal or the common downlink channel; the measurement quantity of the downlink reference signal associated with the first type of SRS; the transmission power of the terminal; the frequency interval between the uplink transmission and the downlink reception of the terminal; the transmission count of the activation request signaling of the first type of SRS.

11. The method according to claim 10, wherein, the determining whether to switch from transmitting the first type of SRS to transmitting the second type of SRS according to second information includes: When the first condition is satisfied, it is determined to switch from transmitting the first type of SRS to transmitting the second type of SRS; wherein, the first condition includes at least one of the following: The first timer corresponding to the first type of SRS expires; The transmission count of the first type of SRS reaches the transmission count threshold of SRS; The TA corresponding to the first type of SRS is invalid, and the TA corresponding to the second type of SRS is valid; The first type of SRS overlaps with the associated downlink reference signal or common downlink channel; The transmission power of the terminal is greater than the preset power threshold; The measurement quantity of the downlink reference signal associated with the first type of SRS is less than the measurement quantity threshold; The frequency separation between the uplink transmission and downlink reception of the terminal is less than the frequency separation threshold; The transmission count of the activation request signaling for the first type of SRS reaches the transmission count threshold of the activation request signaling.

12. According to the method described in claim 10, wherein, Determining whether to switch from transmitting the first type of SRS to transmitting the second type of SRS according to the second information includes: When the second condition is satisfied, it is determined not to switch from transmitting the first type of SRS to transmitting the second type of SRS: wherein, the second condition includes at least one of the following: The first timer corresponding to the first type of SRS has not expired; The transmission count of the first type of SRS has not reached the transmission count threshold; The TA corresponding to the first type of SRS is valid; The first type of SRS does not overlap with the associated downlink reference signal or common downlink channel; The transmission power of the terminal is less than the preset power threshold; The measurement quantity of the downlink reference signal associated with the first type of SRS is greater than the measurement quantity threshold; The frequency separation between the uplink transmission and downlink reception of the terminal is greater than the frequency separation threshold; The transmission count of the activation request signaling for the first type of SRS has not reached the transmission count threshold.

13. According to the method described in any one of claims 10-12, wherein, The priorities of the downlink reference signals associated with the first type of SRS and the second type of SRS are different; or The types of the downlink reference signals associated with the first type of SRS and the second type of SRS are different; or The service types supported by the downlink reference signals associated with the first type of SRS and the second type of SRS are different; or The access states supported by the downlink reference signals associated with the first type of SRS and the second type of SRS are different.

14. According to the method described in any one of claims 1-13, wherein, The method further includes: When the third condition is satisfied, the terminal determines that the beam management in the non-connected state fails and stops transmitting SRS: wherein, the third condition includes at least one of the following: The first timers corresponding to the at least one type of SRS all expire; The transmission counts of the at least one type of SRS all reach the corresponding transmission count thresholds; The TAs corresponding to the at least one type of SRS are all valid; The measurement quantities of the reference signals associated with the at least one type of SRS are all less than the measurement quantity thresholds.

15. The method according to any one of claims 1 - 14, wherein, the first configuration information is further used to configure at least one of the following: the usage of the at least one type of SRS; the period of the at least one type of SRS; the association relationship between the at least one type of SRS and the response sequence; the time - frequency resource information of the response sequence corresponding to the at least one type of SRS.

16. The method according to any one of claims 4 - 7, wherein, the method further includes: the terminal uses X spatial relationship information to send the SRS of the target type, where the X spatial relationship information is selected from Y spatial relationship information indicated by the network - side device, and X and Y are positive integers, and X ≤ Y.

17. A method for transmitting SRS in a duplex mode, wherein, it includes: The network - side device sends first configuration information to the terminal, and the first configuration information is used to configure the SRS resources corresponding to at least one type of SRS; wherein, the SRS resources include at least one of the following: the uplink sub - band within the downlink time unit; the flexible time unit; the uplink sub - band within the flexible time unit; the non - downlink sub - band within the flexible time unit; the uplink time unit; the non - downlink sub - band within the uplink time unit.

18. An apparatus for transmitting SRS in a duplex mode, wherein, it includes: a communication unit, configured to receive first configuration information from a network - side device, where the first configuration information is used to configure the SRS resources corresponding to at least one type of sounding reference signal SRS; and send the SRS according to the SRS resources; wherein, the SRS resources include at least one of the following: the uplink sub - band within the downlink time unit; the flexible time unit; the uplink sub - band within the flexible time unit; the non - downlink sub - band within the flexible time unit; the uplink time unit; the non - downlink sub - band within the uplink time unit.

19. An apparatus for transmitting SRS in a duplex mode, wherein, it includes: a communication unit, configured to send first configuration information to a terminal, where the first configuration information is used to configure the SRS resources corresponding to at least one type of sounding reference signal SRS; wherein, the SRS resources include at least one of the following: the uplink sub - band within the downlink time unit; the flexible time unit; the uplink sub - band within the flexible time unit; the non - downlink sub - band within the flexible time unit; the uplink time unit; the non - downlink sub - band within the uplink time unit.

20. A communication device, wherein, it includes: a memory, a processor, and a computer program stored on the memory and executable on the processor, and when the computer program is executed by the processor, it implements the steps in the method according to any one of claims 1 to 16, or the steps in the method according to claim 17.

21. A readable storage medium, wherein, a program or an instruction is stored on the readable storage medium, and when the program or the instruction is executed by a processor, it implements the steps in the method according to any one of claims 1 to 16, or the steps in the method according to claim 17.

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