SRS configuration method and apparatus in duplex mode, device and storage medium

Abstract

The present application relates to the field of communications, and discloses a sounding reference signal (SRS) configuration method and apparatus in a duplex mode, a device and a storage medium. The method in embodiments of the present application comprises: a terminal receives 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 on the basis of the SRS resources, wherein the SRS resources comprise at least one of the following: an uplink sub-band in a downlink time unit, a flexible time unit, an uplink sub-band in the flexible time unit, a non-downlink sub-band in the flexible time unit, an uplink time unit, and a non-downlink sub-band in the uplink time unit.

Description

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

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on November 24, 2023, with application number 202311588056.9 and invention name “Configuration method, device, equipment and storage medium for SRS in duplex mode”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application belongs to the field of communication technology, and specifically relates to a configuration method, apparatus, device, and storage medium for an SRS in a duplex mode. Background Art

[0003] In related technologies, network-side equipment can configure Sounding Reference Signal (SRS) resources for terminals, which are used for uplink beam training to determine the beam with the best signal quality. However, when duplex mode is introduced, how to configure SRS resources for SRS transmission is an urgent problem that needs to be solved. Summary of the Invention

[0004] Embodiments of the present application provide a method, apparatus, device, and storage medium for configuring an SRS in a duplex mode, which can implement SRS configuration in a duplex mode.

[0005] In a first aspect, a method for configuring an SRS in a duplex mode is provided, the method comprising:

[0006] The terminal receives first configuration information from a network side device, where the first configuration information is used to configure an SRS resource corresponding to at least one type of sounding reference signal SRS;

[0007] The terminal sends the SRS according to the SRS resource; wherein the SRS resource includes at least one of the following:

[0008] Uplink subband within the downlink time unit;

[0009] Flexible time units;

[0010] Uplink subband within flexible time unit;

[0011] Non-downlink sub-band within the flexible time unit;

[0012] Uplink time unit;

[0013] Non-downlink subband within the uplink time unit.

[0014] In a second aspect, a method for configuring an SRS in a duplex mode is provided, the method comprising:

[0015] The network-side device sends first configuration information to the terminal, where the first configuration information is used to configure at least one type of SRS, where the at least one type includes a type of SRS used in a duplex mode.

[0016] In a third aspect, a configuration device for SRS in duplex mode is provided, including:

[0017] 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

[0018] Send the SRS according to the SRS resource; wherein the SRS resource includes at least one of the following:

[0019] Uplink subband within the downlink time unit;

[0020] Flexible time units;

[0021] Uplink subband within flexible time unit;

[0022] Non-downlink sub-band within the flexible time unit;

[0023] Uplink time unit;

[0024] Non-downlink subband within the uplink time unit.

[0025] In a fourth aspect, a configuration device for SRS in duplex mode is provided, including:

[0026] A communication unit, configured to send first configuration information to a terminal, where the first configuration information is used to configure an SRS resource corresponding to at least one type of sounding reference signal SRS;

[0027] The SRS resource includes at least one of the following:

[0028] Uplink subband within the downlink time unit;

[0029] Flexible time units;

[0030] Uplink subband within flexible time unit;

[0031] Non-downlink sub-band within the flexible time unit;

[0032] Uplink time unit;

[0033] Non-downlink subband within the uplink time unit.

[0034] In a fifth aspect, a terminal is provided, comprising a processor and a memory, wherein the memory stores a program or instruction that can be 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.

[0035] In a sixth aspect, a network side device is provided, which includes a processor and a memory, wherein the memory stores programs or instructions that can be run on the processor, and when the program or instructions are executed by the processor, the steps of the method described in the second aspect are implemented.

[0036] In the seventh aspect, a readable storage medium is provided, on which a program or instruction is stored. When the program or instruction is 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.

[0037] In an eighth aspect, a wireless communication system is provided, comprising: a terminal and a network side device, wherein 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.

[0038] In the ninth aspect, a chip is provided, comprising a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the method described in the first aspect, or to implement the method described in the second aspect.

[0039] In the tenth aspect, a computer program / program product is provided, which is stored in a storage medium and is executed by at least one processor to implement the method as described in the first aspect, or to implement the method as described in the second aspect.

[0040] In an embodiment of the present application, a network-side device may configure an SRS resource corresponding to at least one type of SRS for a terminal, where the SRS resource includes at least one of the following: an uplink subband within a downlink time unit; a flexible time unit; an uplink subband within a flexible time unit; a non-downlink subband within a flexible time unit; an uplink time unit; and a non-downlink subband within an uplink time unit. The terminal may transmit an SRS based on the SRS resource, thereby enabling SRS transmission in duplex mode. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] FIG1 is a schematic diagram of a communication system architecture provided in an embodiment of the present application.

[0042] FIG2 is a schematic diagram of a full-duplex system provided by the present application.

[0043] FIG3 is a schematic diagram of another full-duplex provided by the present application.

[0044] Figure 4 is a schematic diagram of gNB full-duplex and UE full-duplex provided in this application.

[0045] FIG5 is a schematic diagram of full-duplex and guard interval (GB) provided by the present application.

[0046] FIG6 is a schematic flowchart of a method for configuring SRS in duplex mode according to an embodiment of the present application.

[0047] FIG7 is a schematic diagram of a full-duplex mode and a protection interval provided according to an embodiment of the present application.

[0048] FIG8 is a schematic diagram of an SRS sending method provided in an embodiment of the present application.

[0049] FIG9 is a schematic diagram of another SRS sending method provided in an embodiment of the present application.

[0050] FIG10 is a schematic diagram of an association relationship between an SRS and a sequence provided in an embodiment of the present application.

[0051] FIG11 is a schematic diagram of another association relationship between an SRS and a sequence provided in an embodiment of the present application.

[0052] FIG12 is a schematic diagram of the SRS type provided in an embodiment of the present application.

[0053] FIG13 is a schematic diagram of the SRS type provided in an embodiment of the present application.

[0054] FIG14 is a schematic diagram of a method for selecting an SRS type provided in an embodiment of the present application.

[0055] FIG15 is a schematic block diagram of a method for configuring SRS in duplex mode according to an embodiment of the present application.

[0056] FIG16 is a schematic block diagram of a method for configuring SRS in duplex mode according to an embodiment of the present application.

[0057] Figure 17 is a schematic block diagram of a communication device provided according to an embodiment of the present application.

[0058] FIG18 is a schematic diagram of the hardware structure of a terminal provided according to an embodiment of the present application.

[0059] Figure 19 is a schematic block diagram of a network-side device provided according to an embodiment of the present application. DETAILED DESCRIPTION

[0060] The following will be combined with the accompanying drawings in the embodiments of this application to clearly describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0061] The terms "first", "second", etc. in this application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable where appropriate, 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 generally of the same type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "or" in this application represents at least one of the connected objects. For example, "A or B" covers three options, namely, Option 1: including A but not including B; Option 2: including B but not including A; Option 3: including both A and B. The character " / " generally indicates that the objects associated before and after are in an "or" relationship.

[0062] The term "indication" in this application can be either a direct indication (or explicit indication) or an indirect indication (or implicit indication). A direct indication can be understood as the sender explicitly informing the receiver of specific information, the operation to be performed, or the requested result, etc. in the instruction sent; an indirect indication can be understood as the receiver determining the corresponding information based on the instruction sent by the sender, or making a judgment and determining the operation to be performed or the requested result, etc. based on the judgment result.

[0063] It is worth noting that the technology described in the embodiments of the present application is not limited to the 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. In the embodiments of the present application, the terms "system" and "network" are often used interchangeably, and the technology described can be used for the systems and radio technologies mentioned above, as well as for other systems and radio technologies. The following description describes a New Radio (NR) system for example purposes, and NR terminology is used in most of the following description, but these techniques can also be applied to systems other than NR systems, such as 6G (6 th Generation, 6G) communication system.

[0064] FIG1 is a block diagram of a wireless communication system applicable to an embodiment of the present application. The wireless communication system includes a terminal 11 and a network-side device 12. The terminal 11 may be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (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 (Wearable Device), an aircraft (Flight Vehicle), a vehicle-mounted device (VUE), a ship-mounted device, a pedestrian user equipment (PUE), a smart home (home appliances with wireless communication capabilities, such as refrigerators, televisions, washing machines, or furniture), a game console, a personal computer (PC), an ATM, or a self-service machine, or other terminal-side devices. Wearable devices include: smart watches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart anklets, 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 embodiment of the present application. The network side device 12 may include an access network device or a core network device, wherein the access network device may also be called a radio access network (Radio Access Network, RAN) device, a radio access network function or a radio access network unit. The access network device may include a base station, a wireless local area network (WLAN) access point (AS) 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 (home evolved Node B), Transmission Reception Point (TRP) or other appropriate terms in the field. As long as the same technical effect is achieved, the base station is not limited to specific technical vocabulary. It should be noted that in the embodiment of the present application, only the base station in the NR system is used as an example for introduction, and the specific type of the base station is not limited.

[0065] To facilitate a better understanding of the embodiments of the present application, the enhanced duplex mode related to the present application is described.

[0066] In 5G mobile communication systems, full-duplex technology has been enhanced to accommodate diverse scenarios and service requirements. Key 5G scenarios include enhanced mobile broadband (eMBB), ultra-reliable and low-latency communication (URLLC), and massive machine-type communication (mMTC). These scenarios place high demands on the system for reliability, low latency, high bandwidth, and wide coverage.

[0067] In NR, configuring full-duplex operation can significantly improve the latency and coverage performance of time division duplex (TDD) systems. For example, subband non-overlapping full duplex reduces self-interference due to the non-overlapping uplink and downlink subbands, thus reducing transmission latency and enhancing coverage.

[0068] For a downlink time slot (DL slot) (configured by TDD uplink and downlink common configuration (tdd-UL-DL-ConfigurationCommon) or TDD uplink and downlink dedicated configuration (tdd-UL-DL-ConfigurationDedicated)), the network configures the downlink bandwidth part (BWP) for the UE, as shown in time slot 1 in Figure 2; for an uplink (UL) time slot (configured by tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated), the network configures the UL BWP for the UE, as shown in time slot 4 in Figure 3.

[0069] For a downlink timeslot (DL slot) (configured by tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated), in a full duplex scenario, as shown in Figure 2, there are the following cases:

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

[0071] Case 2: Configure DL BWP and uplink sub-band (UL sub-band), such as slot 2.

[0072] For an uplink timeslot (UL slot), in a full duplex scenario, as shown in Figure 3, there are the following cases:

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

[0074] Case 4: Configure UL BWP and downlink sub-band (DL sub-band), such as slot 5.

[0075] For sub-band full duplex (SBFD) operation, one SBFD sub-band consists of one resource block (RB) or a set of consecutive RBs with the same transmission direction.

[0076] The time unit (e.g., slot or symbol) in which the gNB uses SBFD operation may be referred to as an SBFD time unit (e.g., slot or symbol).

[0077] An exemplary duplex mode is: full-duplex on the network side, where uplink and downlink transmissions can occur simultaneously at different frequency domain locations at the same time. To prevent interference between uplink and downlink, a guard band (Guard Band) can be reserved between the frequency domain locations corresponding to different transmission directions (corresponding to duplex subbands); half-duplex on the terminal side, consistent with TDD, where only uplink or downlink transmissions can occur at the same time, not both. It is understood that in this duplex mode, uplink and downlink transmissions on the network side can only be directed to different terminals at the same time.

[0078] Another exemplary duplex mode is: both the terminal side and the network side are full-duplex, as shown in Figure 4, that is, both the terminal side and the network side work in 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.

[0079] For full-duplex at the UE side, a larger guard band (GB) (larger than the GB of the base station frequency division (FD)) may be required to suppress self-interference, as shown in FIG5 .

[0080] For a communication device, simultaneous UL reception and DL transmission can cause self-interference. To ensure transmission in the interfered direction, the communication device needs to have self-interference cancellation capabilities, such as reserving a guard band between the receive and transmit bands. However, this reduces UE throughput.

[0081] To facilitate a better understanding of the embodiments of the present application, the random access process related to the present application is described.

[0082] The random access procedure may be a contention-based random access procedure or a non-contention-based random access procedure. The random access procedure may be a four-step random access procedure (also known as a Type-1 random access procedure) or a two-step random access procedure (also known as a Type-2 random access procedure).

[0083] 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 sends message 2 (Msg2) or a random access response (RAR) message, which contains the preamble number detected by the network and the uplink radio resources allocated to the UE for sending message 3 (Msg3). After receiving Msg2, the UE confirms that at least one of the preamble numbers carried in Msg2 matches the preamble number it sent. Then, based on the resources indicated by the RAR, it sends Msg3 containing contention resolution information. After receiving Msg3, the network sends message 4 (Msg4) containing contention resolution information. Upon receiving Msg4, the UE confirms that the resolution information is consistent with the contention resolution information it sent in Msg3, thus completing the four-step random access.

[0084] The network includes uplink grant (UL grant) information in the RAR to indicate the scheduling information of the Msg3 Physical Uplink Shared Channel (PUSCH), and includes information such as the Random Access Preamble ID (RAPID), the Temporary Cell Radio Network Temporary Identity (TC-RNTI), and the Timing Advance (TA). If the network does not receive the Msg3 PUSCH, it can schedule the retransmission of the Msg3 PUSCH in the Physical Downlink Control Channel (PDCCH) scrambled by the TC-RNTI.

[0085] For the contention-based 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 Occasion (RO) resources). This situation can be understood as a UE preamble conflict. In this case, different UEs will receive the same RAR. At this time, different UEs will transmit Msg3 PUSCH according to the scheduling information in the RAR UL grant. The network decodes the PUSCH (including contention resolution information) sent by the UE on the Msg3 PUSCH scheduling resources, so the network will include the contention resolution information received in Msg3 in Msg4. If the contention resolution information in Msg4 received by the UE matches the contention resolution information sent by the UE in Msg3 PUSCH, the UE considers that the contention resolution is successful. If they do not match, the contention resolution is considered unsuccessful.

[0086] If the contention resolution is unsuccessful, the UE reselects RACH resources, performs physical random access channel (PRACH) transmission, and makes the next random access attempt.

[0087] In the two-step random access (2-step RACH) process, the first step is for the UE to send MsgA to the network. After receiving MsgA, the network sends MsgB to the UE. If the UE does not receive MsgB within a certain period of time, the UE increments the counter that counts the number of times MsgA has been sent and resends MsgA. If the counter counts the number of times MsgA has been sent, the UE switches from the 2-step random access process to the 4-step random access process.

[0088] MsgA consists of the MsgA preamble and MsgA PUSCH parts. The preamble part is sent on the Ro used for 2-step RACH, and the PUSCH part is sent on the MsgA PUSCH resources associated with the MsgA preamble and Ro. MsgA PUSCH resources are a set of PUSCH resources configured for each PRACH time slot, including time-frequency resources and demodulation reference signal (DMRS) resources, and are associated with the PRACH resources within the PRACH slot.

[0089] To facilitate understanding of the embodiments of the present application, an uplink sounding reference signal (SRS) resource related to the present application is described.

[0090] Uplink beam training via SRS is supported in NR. However, in the initial access phase, there is no uplink beam management because the terminal does not send SRS. The uplink beam used by the terminal when sending the Preamble and Msg3, or MsgA depends on the terminal's implementation. However, in 4-step RACH, there is a requirement for the consistency of the uplink beam used by the terminal to send 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 send Msg3 is the same as the uplink beam used to send the PUCCH carrying the HARQ-ACK of Msg 4. Similarly, for 2-step RACH, the terminal needs to ensure that the uplink beam used to send MsgA is the same as the uplink beam used to send the PUCCH carrying the HARQ-ACK of Msg B. In a Radio Resource Control (RRC) connected state, the SRS-based uplink beam training result can be used for subsequent uplink transmission.

[0091] When introducing the duplex mode, how to configure SRS is an urgent problem that needs to be solved.

[0092] To facilitate 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 combined arbitrarily with the technical solutions of the embodiments of the present application as optional solutions, and all of them fall within the scope of protection of the embodiments of the present application. The embodiments of the present application include at least part of the following contents.

[0093] FIG6 is a schematic diagram of a method 200 for configuring an SRS in a duplex mode according to an embodiment of the present application. As shown in FIG6 , the method 200 for configuring an SRS in a duplex mode may include at least part of the following contents:

[0094] S201, the network side device sends first configuration information;

[0095] Correspondingly, the terminal receives first configuration information from the network-side device, where the first configuration information is used to configure SRS resources corresponding to at least one type of SRS.

[0096] S202: The terminal sends an SRS according to the SRS resource.

[0097] Correspondingly, the network-side device receives the SRS according to the SRS resource.

[0098] In some embodiments, the SRS resource includes at least one of the following:

[0099] Uplink subband within the downlink time unit;

[0100] Flexible time units;

[0101] Uplink subband within flexible time unit;

[0102] Non-downlink sub-band within the flexible time unit;

[0103] Uplink time unit;

[0104] Non-downlink subband within the uplink time unit.

[0105] In some embodiments, the SRS resource may be used for the terminal to transmit the SRS in duplex mode.

[0106] The duplex mode described in the embodiment of the present application may be, for example, an enhanced duplex mode, or cross duplex (XDD), enhanced full duplex, or enhanced full duplex mode, but the embodiment of the present application is not limited thereto.

[0107] In the embodiment of the present application, SRS type and SRS resource type can be interchangeable. An SRS sent using a type of SRS resource can be considered as an SRS of this type. An SRS resource type can be considered as an SRS resource configuration or an SRS resource configuration type.

[0108] It should be understood that in the embodiment of the present application, the SRS resource type can also be replaced by the SRS resource set type.

[0109] In an embodiment 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.

[0110] Among them, the terminal's support for half-duplex may mean that the terminal can only perform downlink reception (e.g., receiving a DL signal or DL ​​channel) or uplink transmission (e.g., transmitting a UL signal or UL channel) in a time unit. The terminal side supports full-duplex may mean that it can simultaneously perform uplink transmission (e.g., transmitting a UL signal or UL channel) and downlink reception (e.g., receiving a DL signal or DL ​​channel) in a time unit.

[0111] In the embodiment of the present application, the network side device adopts full-duplex mode to achieve the purpose of enhancing coverage, reducing transmission delay, and improving resource utilization efficiency. The terminal adopts full-duplex mode to achieve the above gains while also improving DL or UL throughput.

[0112] In some embodiments, when using full-duplex mode, a guard band (GB) is reserved between UL and DL transmissions to achieve frequency isolation and reduce self-interference. Because the terminal's self-interference cancellation capability is weaker than that of the network-side equipment, the GBs reserved by the terminal when using forward duplex mode are larger than those reserved by the network-side equipment. This means that the terminal requires more reserved physical resource blocks (PRBs) as guard bands.

[0113] Figure 7 (a) shows the subband and GB configuration of the network device in full-duplex mode. Specifically, it shows the time-frequency resources where the UL subband, DL subband, and GB are located. In the UL subband (SB), the network device receives UL channels or signals from terminals. In the DL subband, the network device transmits DL channels or signals to terminals. DL transmissions from the network device can cause self-interference to UL reception.

[0114] As shown in (b) of Figure 7, the subband and GB configuration on the terminal side in full-duplex mode, that is, the network side device configures the UL subband and DL subband and the time-frequency resources where the GB is located for the terminal. The UL transmission of the terminal will cause self-interference to the DL reception.

[0115] In some embodiments, the size of the GB reserved for a terminal is related to the capability of the terminal. For example, the GB reserved for a terminal with strong self-interference cancellation capability is smaller than the GB reserved for a terminal with weak self-interference cancellation capability.

[0116] In some embodiments, the first configuration information is sent via at least one of the following signaling:

[0117] System messages (such as System Information Block (SIB) or Master Information Block (MIB)), Radio Resource Control (RRC) signaling, Media Access Control Control Element (MAC CE), and Downlink Control Information (DCI).

[0118] In some embodiments, the at least one type includes a type of SRS used in a duplex mode, and optionally, may also include a type of SRS used in a non-duplex mode, for example, a type of SRS used in a half-duplex mode adopted by a terminal.

[0119] In some embodiments, the type of SRS used in duplex mode may include, but is not limited to, at least one of the following:

[0120] SRS on the uplink subband in a downlink time unit (eg, downlink time slot or downlink symbol);

[0121] SRS on an uplink time unit (e.g., an uplink time slot or an uplink symbol);

[0122] SRS on a non-downlink subband (e.g., resources outside the downlink subband configured in the uplink time unit) of an uplink time unit (e.g., an uplink time slot or an uplink symbol);

[0123] SRS on flexible time units (e.g., flexible time slots or flexible symbols);

[0124] SRS on uplink subbands in flexible time units (eg, flexible time slots or flexible symbols).

[0125] SRS on a non-downlink subband in a flexible time unit (e.g., a flexible time slot or flexible symbol) (e.g., a downlink subband is configured in the flexible time unit, and the non-downlink subband may be a resource other than the downlink subband configured in the flexible time unit).

[0126] In an embodiment of the present application, the first configuration information is used by the terminal in an idle state (Idle) or a deactivated state (Inactive). That is, the embodiment of the present application can support SRS transmission in duplex mode in an idle state (Idle) or a deactivated state (Inactive), thereby improving resource utilization efficiency in an idle state (Idle) or a deactivated state (Inactive). Introducing SRS in an idle or inactive state can be used for uplink beam management or uplink capacity enhancement. The SRS in an inactive state can also be used for terminal positioning in an inactive state.

[0127] In some embodiments, the first configuration information may be configured in an idle state or an inactive state, or the first configuration information may be configured during a random access phase. In other words, embodiments of the present application may obtain an SRS configuration in a duplex mode in an idle state or an inactive state, or during a random access phase, making SRS configuration more flexible.

[0128] In other embodiments, the first configuration information may also be configured in a connected state. In other words, the embodiments of the present application may obtain the SRS configuration in a duplex mode in a connected state, and the SRS configuration is more flexible.

[0129] In some instances, the first configuration information may include at least one set of SRS resource configurations, used to configure the time-frequency resources (or, SRS transmission opportunities), sequence, usage, etc. of the at least one type of SRS.

[0130] In some embodiments, the SRS resource configuration may include at least one of the following:

[0131] SRS resource set identifier (srs-ResourceSetId);

[0132] SRS resource identifier list (srs-ResourceIdList), used to indicate the SRS resource identifiers included in the SRS resource set;

[0133] SRS power control parameter alpha;

[0134] SRS power control parameter p0;

[0135] Pathloss reference signal (pathlossReferenceRS)

[0136] Number of SRS resource ports (nrofSRS-Ports)

[0137] transmission comb;

[0138] Resource mapping information (resourceMapping), such as the start position (startPosition), the number of symbols (nrofSymbols), the repetition factor (repetitionFactor), etc.

[0139] Frequency domain position (freqDomainPosition);

[0140] Frequency domain shift (freqDomainShift);

[0141] Frequency hopping parameters (freqHopping);

[0142] The sequence identifier (sequenceId) corresponding to the SRS.

[0143] In some embodiments, the first configuration information is further used to configure the usage of the SRS. For example, the SRS resource configuration may include the usage of the SRS.

[0144] Exemplarily, the uses of the SRS may include at least one of the following:

[0145] Beam management;

[0146] Beam management for non-connected states (beamManagementForNonConnected), including, for example, beam management for idle and inactive states;

[0147] Used to determine the codebook:

[0148] Used to determine non-codebook:

[0149] Antenna switching (AntennaSwitching).

[0150] In some embodiments, the at least one type of SRS is associated with a downlink reference signal. By introducing the association between the downlink reference signal and the SRS, the terminal can perform uplink beam training before cell access, determine a more appropriate PRACH transmit beam, and improve PRACH reception reliability.

[0151] Optionally, the downlink reference signal may include, but is not limited to, at least one of the following: a synchronization signal block (Synchronization Signal Block, SSB), a channel state information reference signal (Channel State Information Reference Signal, CSI-RS), and a tracking reference signal (Tracking reference signal, TRS).

[0152] In the embodiment of the present application, SRS is associated with a downlink reference signal, which can also be expressed as: SRS resources are associated with downlink reference signal resources, for example, SRS resources are associated with SSB resources, and SRS resources are associated with CSI-RS resources.

[0153] The SSB described in the embodiment of the present application can also be called a resource block, which includes at least one of a synchronization signal, a broadcast signal, a broadcast channel (PBCH), and other system messages.

[0154] In some embodiments, the terminal may select a downlink reference signal (e.g., an SSB), for example, by selecting a target downlink reference signal (e.g., a target SSB) based on a measurement value of the downlink reference signal and a measurement value threshold (e.g., specified by a protocol or indicated by a network-side device). For example, a downlink reference signal whose measurement value is greater than the measurement value threshold may be selected as the target downlink reference signal. Furthermore, the terminal may select, based on a mapping relationship between the downlink reference signal and the SRS, to transmit an SRS associated with the target downlink reference signal.

[0155] For example, the network side device can configure the SRS and related parameters (such as power parameters) on the uplink subband to the terminal through the SIB or MIB. Furthermore, the terminal can select the target downlink reference signal by detecting the downlink reference signal, and then select to send the SRS associated with the target downlink reference signal based on the association relationship between the target downlink reference signal and the SSB.

[0156] In some embodiments, the at least one type of SRS may be associated with a UL signal or UL channel: message A (MsgA) in two-step random access (or MsgA PUSCH), physical random access channel (PRACH).

[0157] For example, multiple SRSs are associated with one PRACH / MsgA / MsgA PUSCH. By introducing the association relationship between PRACH / MsgA / MsgA PUSCH and multiple SRSs, different terminals can use beams associated with different SRSs to send the same preamble, thereby improving the PRACH capacity.

[0158] For another example, one SRS is associated with multiple PRACH / MsgA / MsgA PUSCHs. By introducing the association relationship between multiple PRACH / MsgA / MsgA PUSCHs and SRSs, it is possible to support repeated transmission of multiple PRACH / MsgA / MsgA PUSCHs associated with the same SRS, thereby improving the reliability of PRACH / MsgA / MsgA PUSCH transmission.

[0159] In the embodiment of the present application, the SRS is associated with the UL signal or UL channel, which can also be expressed as:

[0160] The SRS resource and the UL signal resource or the UL channel resource are associated with each other. For example, the SRS resource and the MsgA resource or the MsgA PUSCH resource are associated with each other, and the SRS resource and the PRACH resource are associated with each other.

[0161] The association relationship in the embodiment of the present application can also be called a mapping relationship.

[0162] In some embodiments, the SRS may be sent periodically, as shown in Figure 8. For example, the period of the SRS may be configured through the first configuration information.

[0163] In some embodiments, on different SRS resources, the terminal uses different spatial relationship information (e.g., beam) to send SRS, which helps ensure that the network side device obtains the spatial relationship information (e.g., transmission beam direction) with the best reception quality on the terminal side and ensures the reliability of UL transmission.

[0164] For example, the terminal uses different beams to send SRS on different SRS resources within an SRS cycle. As shown in FIG8 , four SRS resources, namely SRS1 to SRS4, are sent within one cycle using beams 1 to 4, respectively.

[0165] 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 may send SRS on the first M SRS resources and not send SRS on the remaining NM SRS resources.

[0166] As shown in Figure 9, the terminal supports a maximum of two beams. If the network device indicates four SRS occasions, the terminal can use two different beams to transmit SRS in the first two SRS occasions and not transmit SRS in the remaining two SRS occasions. Alternatively, the terminal can also transmit SRS in a round-robin manner. That is, it can use two different beams to transmit SRS in the first two SRS occasions and also use two different beams to transmit SRS in the last two SRS occasions.

[0167] 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 the SRS for subsequent random access.

[0168] In some embodiments, the at least one type of SRS is associated with the response sequence, and the network device may implicitly indicate the selected SRS to the terminal through the response sequence. This association may be specified by a protocol or configured by the network device, for example, through the first configuration information.

[0169] In some embodiments, response sequences associated with different types of SRS are configured on different frequency domain resources, such as different PRBs, as shown in Figure 10. In this way, the terminal can determine which response sequence the network device has sent based on the frequency domain resource where the response sequence is located, and thus determine which SRS the network device has indicated to the terminal.

[0170] For example, after the network side device selects the target SRS by measuring the SRS, it can send a response sequence associated with the target SRS to the terminal. The response sequence is sent on the corresponding frequency domain resources. Thus, the terminal can determine the SRS selected by the network side device based on the response sequence and / or the frequency domain resources where the response sequence is located in combination with the association relationship.

[0171] In some embodiments, the network-side device may configure the terminal with at least one type of time-frequency resources of an SRS-associated response sequence, for example, through first configuration information.

[0172] In some embodiments, the response sequence can be a CSI-RS sequence. For example, as shown in Figure 11, the network-side device configures four SRS resources corresponding to four sequences, i.e., 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 detects that the signal quality of SRS3 is the best, sequence 3 is sent in the time-frequency resource of sequence 3. When the terminal detects sequence 3, it is known that the network-side device will achieve better reception quality when using the beam of SRS3. When subsequently sending Msg1 / Msg3 / MsgA, etc., the beam corresponding to SRS3, i.e., beam 3, can be used.

[0173] In some embodiments, the at least one type of SRS includes at least one of the following types:

[0174] SRS located on different frequency domain resources;

[0175] SRS needs to be activated;

[0176] No SRS activation required;

[0177] SRS for different business types;

[0178] SRS for different purposes;

[0179] SRS for different terminal types;

[0180] SRS on flexible time units (e.g., SRS on resources outside the DL subband on flexible time units);

[0181] SRS that overlaps with downlink reference signal resources;

[0182] SRS that does not overlap with downlink reference signal resources;

[0183] The SRS on the uplink subband can be optionally further divided into: an uplink subband on a flexible time unit, an uplink subband on a downlink time unit, and an uplink subband on a UL time unit according to the time unit in which the SRS is located;

[0184] The SRS on the uplink time unit, that is, the frequency domain resources where the SRS is located, are all uplink frequency domain resources.

[0185] That is, the network equipment can divide the SRS type according to whether it needs to be activated, 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.

[0186] Exemplarily, the SRS located on different frequency domain resources may include but is not limited to at least one of the following:

[0187] SRS located in different sub-bands, different frequency bands, different carriers, and different BWPs.

[0188] Exemplarily, the SRS for different service types may include but is not limited to at least one of the following:

[0189] SRS for Multimedia Broadcast Service (MBS), SRS for unicast services, SRS for machine-type communication, and SRS for synaesthesia-type communication. By classifying SRS types based on the services they support, it helps ensure that terminals select the appropriate SRS type when transmitting services.

[0190] Exemplarily, the SRS for different terminal types (or terminal capabilities) may include, but is not limited to, at least one of the following:

[0191] SRS for traditional terminals, SRS for reduced capability (RedCap) terminals, and SRS for zero power terminals. By classifying SRS types according to the terminal types supported by SRS, it is helpful to ensure that different types of terminals select the appropriate type of SRS.

[0192] In some embodiments, the downlink time unit may include but is not limited to at least one of the following:

[0193] Orthogonal frequency-division multiplexing (OFDM) symbol, time slot, subframe, frame, microsecond, millisecond, second, minute, hour, day, week, month.

[0194] In some embodiments, the uplink time unit may include but is not limited to at least one of the following:

[0195] Orthogonal frequency-division multiplexing (OFDM) symbol, time slot, subframe, frame, microsecond, millisecond, second, minute, hour, day, week, month.

[0196] In some embodiments, the flexible time unit may include but is not limited to at least one of the following:

[0197] Orthogonal frequency-division multiplexing (OFDM) symbol, time slot, subframe, frame, microsecond, millisecond, second, minute, hour, day, week, month.

[0198] The flexible time unit can be used for uplink transmission or downlink transmission.

[0199] In the following, the uplink time unit is a UL symbol, the downlink time unit is a DL symbol, and the flexible time unit is a flexible symbol. However, the present application is not limited thereto.

[0200] In some embodiments, the time-frequency resource location of the SRS includes at least one of the following:

[0201] UL subband on DL symbols;

[0202] UL sub-band on the UL symbol;

[0203] UL symbol;

[0204] Flexible symbols.

[0205] In some embodiments, for flexible symbols, the time-frequency resource location of the SRS includes at least one of the following:

[0206] If the flexible symbol does not have a UL subband configured, but a DL subband is configured, the SRS may occupy time-frequency resources outside the DL subband on the flexible symbol;

[0207] If the flexible symbol is configured only with a UL subband, the SRS is located on the UL subband;

[0208] If no UL subband and DL subband are configured on the flexible symbol, the SRS may occupy part or all of the time-frequency resources on the flexible symbol.

[0209] In some embodiments, for network-side devices and terminals that support duplex mode, the symbols may be of the following types:

[0210] DL symbol;

[0211] Configure DL symbols for UL SB;

[0212] Configure UL symbols for DL ​​SB;

[0213] UL symbol.

[0214] In some embodiments, as shown in FIG12 , based on the time unit or frequency domain unit where the SRS is located, at least one of the following types of SRS may be included, or in other words, the following two types of SRS resource / SRS resource set configurations may be included:

[0215] 1. SRS configured on a UL subband. In this case, the time unit where the UL subband is located can be a UL time unit, or it can also be a DL time unit. This type of SRS is recorded as Type A SRS, and the SRS resource / SRS resource set corresponding to this type of SRS can be considered as a Type A SRS resource.

[0216] 2. SRS configured on a UL time unit. In this case, no DL subband is configured on the UL time unit. This type of SRS is recorded as Type B SRS, and the SRS resource / SRS resource set corresponding to this type of SRS can be considered as Type B SRS resources.

[0217] For simplicity, the SRS types for flexible symbols are no longer classified separately. SRSs configured in flexible time units can be classified in a similar manner. For example, an SRS configured in an uplink subband of a flexible time unit can be a Type A SRS. An SRS configured in a flexible time unit (where no uplink subband and DL subband are configured) can be a Type B SRS.

[0218] In some embodiments, depending on the overlap between the SRS and a downlink reference signal (e.g., SSB) or a common DL channel, at least one of the following types of SRS may be included, or in other words, the following two types of SRS resource / SRS resource set configurations may be included:

[0219] 1. The SRS is configured on the UL SB where the DL symbols of the SSB / common DL channel exist. That is, the SRS and the SSB / common DL channel overlap in the time domain, as shown in Configuration 1 in Figure 12. In this configuration, the uplink transmission of one terminal can interfere with the reception of the SSB / common DL channel of other terminals, i.e., cross-link interference occurs. If the terminal uses this SSB for measurement or needs to decode the common DL channel to obtain critical information (such as control information), it will also experience self-interference.

[0220] 2. The SRS is configured on a UL SB in a DL symbol where no SSB / common DL channel exists. That is, the SRS and SSB / common DL channel do not overlap in the time domain, as shown in Configuration 2 in Figure 12. In this configuration, uplink transmissions by one terminal can interfere with the reception of DL channels or DL ​​signals, such as the PDCCH, Physical Downlink Shared Channel (PDSCH), or CSI-RS, by other terminals.

[0221] 3. The SRS is configured on the UL SB of the UL symbol, as shown in Configuration 3 in Figure 12. The interference situation in this configuration is similar to that in Configuration 2.

[0222] 4. SRS is configured on UL symbols, as shown in Configuration 4 in Figure 12. This configuration does not cause cross-link interference.

[0223] In some embodiments, the SRS and the downlink reference signal (e.g., SSB) have the following association relationship:

[0224] A downlink reference signal is associated with at least one SRS resource on an uplink time unit and / or an SRS resource on an uplink subband. In this way, the terminal can choose to send SRS on an uplink time unit or on an uplink subband, which can reduce the delay of beam training.

[0225] For example, as shown in FIG13 , SSB1 associates SRS1-1 and SRS1-2, where SRS1-1 is configured in the UL SB and SRS1-2 is configured in the UL symbol. The terminal can choose to transmit SRS in the UL SB or transmit SRS on the UL symbol, thereby obtaining more SRS transmission opportunities and reducing the beam training delay.

[0226] 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 prioritize SRS resources on the UL SB and then select SRS resources on the UL symbol.

[0227] In some embodiments, the multiple downlink reference signals are associated with at least one SRS located in a UL symbol and an SRS in a UL SB. For example, the SRSs associated with different downlink reference signals may be the same or different.

[0228] In some embodiments, each type of SRS in the at least one type corresponds to a transmission count threshold (denoted as SRS-RetransmissionCounter), or in other words, a maximum number of transmissions. The transmission count threshold may be specified by a protocol or configured by a network device.

[0229] Optionally, the transmission number threshold corresponding to each SRS type may be the same, or may be different.

[0230] In the case that the terminal does not receive the response sequence for the SRS from the network device side, the terminal may retransmit the SRS, for example, send the SRS in a subsequent SRS period or SRS occasion, and increase the number of SRS transmissions by one.

[0231] For example, for Type A SRS, a transmission count threshold A (denoted as SRS-RetransmissionCounter A) is configured; for Type B SRS, a transmission count threshold A (denoted as SRS-RetransmissionCounter B) is configured. If the terminal prefers to send Type A SRS and does not receive a response sequence from the network-side device on the time-frequency resources of the response sequence, and the number of SRS transmissions does not reach SRS-RetransmissionCounter A, the terminal will resend the SRS on the subsequent SRS occasion of the Type A SRS.

[0232] In some embodiments, each type of SRS in the at least one type corresponds to a transmission time threshold, or in other words, a maximum transmission time. The transmission time threshold may be specified by a protocol or configured by a network-side device.

[0233] Optionally, the transmission time threshold corresponding to each SRS type may be the same or different.

[0234] If the terminal does not receive the response sequence for the SRS from the network device and the maximum transmission time of the SRS has not been reached, the terminal may retransmit the SRS, for example, by transmitting the SRS in a subsequent SRS cycle or SRS occasion. When the maximum transmission time of the SRS is reached, the terminal stops transmitting the SRS.

[0235] For example, for Type A SRS, the transmission time threshold A is configured, and for Type B SRS, the transmission time threshold A is configured. If the terminal prefers 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 time of the SRS does not reach the transmission time threshold A, the terminal will continue to send the SRS on the subsequent SRS occasion of the Type A SRS.

[0236] In some embodiments, each of the at least one type of SRS corresponds to a first timer (or SRS detection failure timer) for determining a maximum time length for receiving a response from a network device to a transmitted SRS. If the terminal does not receive a response from the network device to the SRS upon expiration of the first timer, it indicates that the network device has failed to detect the SRS. The first timer is started after the terminal transmits the SRS.

[0237] For example, for Type A SRS, configure SRS detection failure timer A, and for Type B SRS, configure SRS detection failure timer B. If the terminal prefers to send Type A SRS, if the response sequence for Type A SRS is not received from the network side device before the SRS detection failure timer A times out, it means that the network side device fails to detect Type A SRS.

[0238] Optionally, when the first timers corresponding to the at least one type of SRS all expire, the terminal determines that the beam management for the non-connected state (beamManagementForNonConnected) fails and stops sending the SRS.

[0239] In this case, the beam used by the terminal to send Msg1 or Msg3 during the random access process may be determined by the terminal, for example, by randomly selecting a beam.

[0240] In some embodiments, the at least one type of SRS resource corresponds to different transmit powers. The transmit power corresponding to each type of SRS may be configured by a network-side device or may be specified by a protocol.

[0241] For example, the network side device can configure Type A SRS and Type B SRS to use different transmission powers. Optionally, the transmission power of Type B SRS is greater than the transmission power of Type A SRS. This is because Type B SRS does not have cross-link interference or self-interference problems, so a larger transmission power can be used. Type A SRS has cross-link interference or self-interference problems, so a smaller transmission power needs to be used to reduce interference to other terminals or itself.

[0242] In some embodiments of the present application, the method 200 further includes:

[0243] Selecting an SRS of a target type from the at least one type of SRS according to the first information;

[0244] The first information includes at least one of the following:

[0245] downlink reference signal measurement quantity;

[0246] an order of SRS resources corresponding to the at least one type of SRS;

[0247] Whether the SRS resource corresponding to the at least one type of SRS is activated or deactivated;

[0248] a priority of the at least one type of SRS;

[0249] Information of a downlink reference signal associated with the at least one type of SRS;

[0250] Bandwidth information of the terminal;

[0251] carrier information of the terminal;

[0252] Bandwidth part BWP information of the terminal;

[0253] capability information of the terminal;

[0254] The access status of the terminal;

[0255] The service type of the service to be transmitted by the terminal.

[0256] The target type may be considered as the type of SRS used for actually sending the SRS.

[0257] In some embodiments, selecting the target type of SRS from the at least one type of SRS according to the first information can also be expressed as:

[0258] Selecting an SRS resource of a target type from the at least one type of SRS resources according to the first information; or

[0259] An SRS resource configuration of a target type is selected from at least one SRS resource configuration according to the first information.

[0260] It should be understood that in the embodiment of the present application, when selecting the SRS type according to the SRS resource, a certain SRS resource is selected, that is, the SRS resource type corresponding to the SRS resource is selected, that is, the SRS of the SRS resource type is selected.

[0261] The following describes the method for selecting the SRS type in conjunction with Example 1.

[0262] Embodiment 1-1: Selecting an SRS type according to the order of SRS resources, or in other words, selecting SRS resources.

[0263] In some embodiments, the order of the SRS resources includes at least one of the following:

[0264] The time order of SRS resources and the frequency order of SRS resources.

[0265] For example, according to the time sequence of the SRS resources, the most recent SRS resource is preferentially selected (ie, the SRS resource type corresponding to the most recent SRS resource is selected), which is beneficial to reducing the beam training delay.

[0266] For another example, according to the frequency order of the SRS resources, for example, the SRS resource with a low frequency is preferentially selected (ie, the SRS resource type corresponding to the SRS resource is selected).

[0267] For another example, the SRS type is selected in combination with the time order and frequency order of the SRS resources, for example, the time order is the first order and the frequency order is the second order, or the frequency order is the first order and the time order is the second order.

[0268] For example, as shown in FIG14 , one SSB is associated with four SRS occasions, each of which includes two SRS resources. The SRS resources in SRS ocassion 1 and SRS ocassion 2 are Type A SRS, while SRS ocassion 3 and SRS ocassion 4 are Type B SRS.

[0269] The terminal may select the SRS type according to the above sequence.

[0270] As an example, if the order of frequency domain first and then time domain is followed, the terminal selects SRS resources in the following order:

[0271] SRS resources in SRS ocassion 1 (i.e., SRS resource 1 or SRS resource 2), SRS resources in SRS ocassion 2 (SRS resource 3 or SRS resource 4), SRS resources in SRS ocassion 3 (SRS resource 5 or SRS resource 6), and SRS resources in SRS ocassion 4 (SRS resource 7 or SRS resource 8).

[0272] As an example, if the order of time domain first and frequency domain second is followed, the terminal selects SRS resources in the following order:

[0273] SRS resources in SRS ocassion 1 (i.e., SRS resource 1 or SRS resource 2), SRS resources in SRS ocassion 3 (SRS resource 5 or SRS resource 6), SRS resources in SRS ocassion 2 (SRS resource 3 or SRS resource 4), and SRS resources in SRS ocassion 4 (SRS resource 7 or SRS resource 8).

[0274] Embodiment 1-2: Selecting an SRS type according to the activation / deactivation status of an SRS resource, or selecting an SRS resource.

[0275] In some embodiments, network-side devices can activate / deactivate SRS resources. For example, public signaling can be used to notify the terminal that some or all SRS resources of a certain type are activated / deactivated. Alternatively, some or all SRS resources of a certain type can be activated / deactivated based on preset conditions. If some or all SRS resources of a certain type require activation before use, whether the terminal selects this type of SRS resource can be determined based on whether optional SRS resources within this type of SRS resource are activated.

[0276] In some embodiments, when preset conditions are met, a type of SRS is activated, and the terminal can then use the activated SRS resources. For example, the network-side device configures the terminal with Type A SRS resources and Type B SRS resources. The network-side device configures the terminal to give priority to a certain type of SRS resource, for example, the terminal gives priority to Type A SRS resources, and the terminal can use Type B SRS resources only after beam training fails with Type A SRS resources, for example, when the SRS is sent using Type A SRS resources and reaches a transmission count threshold or a maximum transmission time. After reaching a predefined number of transmissions or a maximum transmission time, the Type A SRS resource is deactivated or becomes invalid.

[0277] It should be understood that the activation method of the SRS resource illustrated here is only an example, but the present application is not limited to this. In the following embodiments, when the terminal switches from the first type of SRS resource to the second type of SRS resource, the second type of SRS resource can be considered to be activated and the first type of SRS resource is deactivated. Therefore, the switching condition of the SRS resource can also be considered to be the activation / deactivation condition of the SRS resource.

[0278] In some embodiments, if all SRS resources of Type A (i.e., resources used to transmit Type A SRS) are not activated, and some or all SRS resources of Type B (i.e., resources used to transmit Type B SRS) are activated, the terminal can select the activated SRS resources among the SRS resources of Type B.

[0279] In some embodiments, the terminal can also select an SRS resource based on whether the SRS resource is valid or invalid. For example, the network notifies the terminal to activate the SRS resource at time n. The SRS resource will only become valid and be used by the terminal at time n+k. k can be indicated or predefined by the network device.

[0280] For example, if a type of SRS resource needs to be activated and valid before it can be used, the terminal will consider whether the SRS resource is valid when selecting the SRS resource. For example, if a first type of SRS resource is activated and valid, and a second type of SRS resource is activated but not valid, the terminal may give priority to the first type of SRS resource.

[0281] That is, when a type of SRS resource has been activated or is effective, the terminal preferentially selects this type of SRS resource for SRS transmission. It is assumed here that this type of SRS resource needs to be activated.

[0282] Embodiment 1-3: Select an SRS type (or an SRS resource type) based on the priority of the SRS type, or select an SRS resource.

[0283] In some embodiments, different SRS resource types can be configured to correspond to different priorities. Optionally, the priority corresponding to the SRS resource type can be specified by the protocol or configured by the network-side device. Furthermore, the terminal can select SRS resources based on the priority of the SRS resource type. For example, SRS resources of the SRS resource type with the highest priority can be preferentially selected.

[0284] In some embodiments, the information of the reference signal associated with the SRS includes at least one of the following:

[0285] A measurement value of a downlink reference signal (such as an SSB or a CSI-RS) associated with the at least one type of SRS, or a path loss between a network-side device and a terminal;

[0286] Whether the downlink reference signal associated with the at least one type of SRS is valid or invalid;

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

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

[0289] The service type supported by the downlink reference signal or frequency associated with the at least one type of SRS;

[0290] The access status supported by the downlink reference signal or frequency point associated with the at least one type of SRS.

[0291] In some embodiments, the measurement quantity of the downlink reference signal includes but is not limited to at least one of the following:

[0292] Reference Signal Receiving Power (RSRP) (e.g., 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).

[0293] If the downlink reference signal measurement (e.g., RSRP) between the terminal and the network device is high, indicating low path loss between the terminal and the network device and a close proximity to the network device, the SRS transmit power used can be lower. This reduces cross-link interference to other terminals' downlink reception (e.g., SSB / common DL channels), and also reduces self-interference to the terminal's own simultaneous DL channel / signal measurement or reception.

[0294] If the measurement value of the downlink reference signal between the terminal and the network side device (such as RSRP) is low, it means that the path loss between the terminal and the network side device is high and the terminal is far away from the network side device, then the transmission power of the SRS used 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 the reception of key signals or channels such as SSB, public DL channels, and DL data channels by other terminals. In severe cases, it will affect the access and normal communication of other terminals. In addition, the self-interference of 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.

[0295] In some embodiments, for at least one SRS configured on a UL subband, an SRS with a larger downlink reference signal measurement value may be preferentially selected. For example, an SRS associated with a reference signal with a measurement value greater than a certain measurement value threshold may be preferentially selected.

[0296] In some embodiments, each type of SRS in the at least one type corresponds to a first measurement quantity threshold, and the terminal can select a target type of SRS in the at least one type of SRS based on 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.

[0297] In some embodiments, the first measurement quantity threshold corresponding to each type of SRS is predefined or configured by a 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 may be specified by a protocol or configured by a network-side device. The preset measurement quantity threshold is a transmission condition for the SRS, i.e., the SRS may be transmitted on the configured SRS resource only when the measurement quantity of the downlink reference signal associated with the SRS is greater than or equal to the preset measurement quantity threshold.

[0298] For example, a measurement quantity threshold 1 is configured for a Type A SRS, and a measurement quantity threshold 2 is configured for a Type B SRS, where the measurement quantity threshold 1 is greater than the measurement quantity threshold 2. Optionally, both the measurement quantity threshold 1 and the measurement quantity threshold 2 are greater than a preset measurement quantity threshold. Furthermore, the terminal may select an SRS of a target type based on the measurement quantity of the downlink reference signal associated with the Type A SRS and the measurement quantity threshold 1 and the measurement quantity threshold 2, respectively.

[0299] For example, if the measurement value of the SSB associated with Type A SRS is greater than measurement value threshold 2 but less than measurement value threshold 1, Type B SRS can be selected, that is, the SRS resource configured on the uplink symbol can be selected. Measurement value threshold 2 may not be configured.

[0300] For example, if the measurement value of the SSB associated with Type A SRS is greater than or equal to the measurement value threshold 1, Type A SRS or Type B SRS can be selected. The network-side device can configure the terminal to give priority to Type A SRS, that is, the SRS configured in the UL SB. This can provide more beam training opportunities, help reduce beam training delay, and also reduce interference to other terminals.

[0301] Embodiment 1-5: The SRS type is selected according to whether the downlink reference signal associated with the SRS is valid or invalid.

[0302] For example, if the downlink reference signal associated with a type of SRS needs to be valid before it can be used. For example, if the SSB associated with a type of SRS is an on-demand SSB and needs to be activated and valid before it can be used, the terminal may consider whether the downlink reference signal associated with the SRS is valid when selecting the SRS type. For example, if the downlink reference signal associated with the first type of SRS is activated and valid, and the second type of SRS is activated but not valid, the terminal may give priority to the first type of SRS.

[0303] Embodiment 1-6: The SRS type is selected according to the priority of the downlink reference signal / frequency associated with the SRS.

[0304] In some embodiments, priorities for different downlink reference signals / frequencies can be configured. For example, the priorities for different downlink reference signals / frequencies are specified by the protocol, or configured by network-side devices, such as through the MIB or SIB. Furthermore, the terminal can select an SRS type based on the priority of the downlink reference signal / frequency associated with the SRS. For example, an SRS associated with a downlink reference signal / frequency with a higher priority is preferentially selected.

[0305] In other embodiments, the terminal may also select a downlink reference signal according to a preset rule, and further select an SRS associated with the downlink reference signal. For example, based on the priority of the service to be transmitted, a downlink reference signal of the same priority may be selected, and then the SRS associated with the downlink reference signal may be selected. 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 send a high-priority service, the SRS resource corresponding to the SSB of priority 1 is selected.

[0306] Embodiment 1-7: Select the SRS type according to the type of downlink reference signal / frequency associated with the SRS.

[0307] In some embodiments, different downlink reference signal / frequency types can be configured. Optionally, the downlink reference signal / frequency type can be specified by the protocol or configured by the network device, for example, via the MIB or SIB. The terminal can select a downlink reference signal of the corresponding type based on preset rules (e.g., the type of service to be transmitted) and further select an SRS associated with the downlink reference signal.

[0308] Illustratively, the type of the downlink reference signal / frequency point may include, but is not limited to, at least one of the following:

[0309] TDD, Frequency Division Duplex (FDD), Non-Terrestrial Network (NTN), Reduced Capacity (RedCap).

[0310] For example, if the type of SSB1 is type 1 (such as TDD) and the type of SSB2 is type 2 (such as FDD), when the terminal needs to send type 1 services, the SRS resources associated with the type 1 SSB are selected.

[0311] Embodiment 1-8: The SRS type is selected according to the service type supported by the downlink reference signal / frequency associated with the SRS.

[0312] In some embodiments, the service types supported by different downlink reference signals / frequencies can be configured. Optionally, the service types targeted by the downlink reference signals / frequencies can be specified by the protocol, or configured by network-side devices, such as through MIB or SIB configuration.

[0313] In some embodiments, the terminal may select a downlink reference signal supporting the type of service according to a preset rule (eg, the type of service to be transmitted), and further select an SRS associated with the downlink reference signal.

[0314] Exemplarily, the service types supported by the downlink reference signal / frequency point may include, but are not limited to, at least one of the following:

[0315] MBS, unicast service, machine type communication, and synaesthesia type communication.

[0316] For example, if SSB1 supports service type 1 (such as MBS) and SSB2 supports service type 2 (such as unicast service), when the terminal needs to send type 1 service, the SRS associated with the SSB of type 1 (ie, SSB1) is selected.

[0317] Example 1-9: Select the SRS type according to the access status supported by the downlink reference signal / frequency point associated with the SRS.

[0318] In some embodiments, the access states supported by different downlink reference signals / frequencies may be configured. Optionally, the access states supported by the downlink reference signals / frequencies may be specified by a protocol or configured by a network device, such as through MIB or SIB configuration.

[0319] In some embodiments, the terminal may select a downlink reference signal that supports the access state according to a preset rule (eg, the current access state of the terminal), and further select an SRS resource associated with the downlink reference signal.

[0320] Exemplarily, the access state supported by the downlink reference signal / frequency point may include but is not limited to at least one of the following:

[0321] Barred state, energy-saving state, network busy / overload state.

[0322] For example, if SSB1 supports access state 1 and SSB2 supports access state 2, when the terminal needs to enter access state 1, the terminal selects the SRS associated with the SSB supporting access state 1 (ie, SSB1).

[0323] Embodiment 1-9: Selecting the SRS type according to the bandwidth information of the terminal.

[0324] In some embodiments, the bandwidth information of the terminal includes at least one of SRS resource type information supported by the terminal under the target bandwidth and whether the terminal supports a duplex mode.

[0325] In some embodiments, the target bandwidth may be the bandwidth configured by the network side device for the terminal.

[0326] For example, if the terminal only supports Type B SRS under the target bandwidth, or does not support duplex mode (such as SBFD mode), the terminal may select Type B SRS, ie, SRS in the UL time unit.

[0327] Embodiment 1-10: Select the SRS type according to the carrier information of the terminal.

[0328] In some embodiments, the carrier information of the terminal includes at least one of SRS type information supported by the terminal in the target carrier and whether the terminal supports a duplex mode.

[0329] In some embodiments, the target carrier may be a carrier configured by a network-side device for the terminal.

[0330] For example, if the terminal only supports Type B SRS under the target carrier, or does not support duplex mode (such as SBFD mode), then the terminal may select Type B SRS, that is, SRS resources located in the UL time unit.

[0331] Example 1-11: Select the SRS type according to the BWP information of the terminal.

[0332] In some embodiments, the BWP information of the terminal includes at least one of SRS type information supported by the terminal under the target BWP and whether the terminal supports a duplex mode.

[0333] In some embodiments, the target BWP may be a BWP configured by a network-side device for the terminal, or a currently activated BWP.

[0334] For example, if the terminal only supports Type B SRS under the target BWP, or does not support duplex mode (such as SBFD mode), the terminal may select Type B SRS, ie, SRS resources located in the UL time unit.

[0335] Example 1-12: Select the SRS type according to the capability information of the terminal.

[0336] In some embodiments, the capability information of the terminal may include information on SRS types supported by the terminal and / or whether the terminal supports a duplex mode.

[0337] For example, if the network side device configures Type A SRS and Type B SRS for the terminal, if the terminal does not support SBFD, then when selecting the SRS type, the terminal may only be allowed to use the SRS located in the UL time unit -, so Type B SRS may be selected.

[0338] It should be understood that the above-mentioned embodiments 1-1 to 1-12 can be implemented separately or in combination, and this application does not limit this. For example, the terminal can select the target type of SRS based on the capability information of the terminal and the priority of the SRS type. For example, the SRS type with the highest priority is selected among the SRS types supported by the terminal. For another example, the terminal can also select the target type of SRS based on the measurement amount of the downlink reference signal associated with the SRS and the order of the SRS resources. For example, if the measurement amounts of the downlink reference signals associated with multiple SRSs are all greater than the measurement amount threshold, the target type of SRS can 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 target type of SRS.

[0339] It should be noted that the above SRS type selection method is only an example. The terminal may also select the SRS type in combination with other information, and this application is not limited to this. For example, different types of SRS may be used for the initial transmission and retransmission of the SRS. For example, using a specific type of SRS, such as Type B SRS, for the initial transmission of the SRS can reduce the impact of self-interference and / or cross-link interference, and improve the reliability of the initial SRS transmission.

[0340] In some embodiments, the initial transmission of the SRS may include, but is not limited to, at least one of the following:

[0341] The first transmission without power ramping;

[0342] The first transmission without instructions for repeat transmission;

[0343] Contains the first transmission of repeated transmissions.

[0344] In some embodiments, for repeated transmission of SRS, the terminal may increase the transmission power of SRS according to the network-side device configuration or predefined rules, and the increase amplitude may be configured by the network-side device.

[0345] In some embodiments of the present application, the S202 includes:

[0346] The terminal uses X pieces of spatial relationship information (SpatialRelationInfo) to send an SRS of a target type.

[0347] In some embodiments, the terminal supports X pieces of spatial relationship information, and the network device may indicate Y pieces of spatial relationship information to the terminal, where X ≤ Y. The terminal may then select X pieces of spatial relationship information from the Y pieces of spatial relationship information according to a preset rule (e.g., a predefined order) for use in transmitting an SRS. For example, the target type of SRS may be transmitted using the X pieces of spatial relationship information on X consecutive SRS occasions. The SRS transmitted on different SRS occasions may be transmitted using different pieces of spatial relationship information.

[0348] In some embodiments, the spatial relationship information is also called spatial setting.

[0349] In some embodiments, the spatial relationship information includes but is not limited to at least one of the following:

[0350] Beam information, reference signal set information, transmission configuration indicator (TCI) status information, antenna panel information, and control resource set group (coresetPoolIndex) information.

[0351] In some embodiments of the present application, the method 200 further includes:

[0352] determining, based on the second information, whether to switch from sending the first type of SRS to sending the second type of SRS;

[0353] The second information includes at least one of the following:

[0354] a first timer corresponding to the first type of SRS;

[0355] The number of transmissions corresponding to the first type of SRS;

[0356] the validity of the first type of SRS;

[0357] a measurement amount of a downlink reference signal associated with the first type of SRS;

[0358] validity of the timing advance TA corresponding to the first type of SRS;

[0359] whether the first type of SRS overlaps with an associated downlink reference signal or a common DL channel;

[0360] the transmit power of the terminal;

[0361] The frequency interval between uplink transmission and downlink reception of the terminal;

[0362] The number of transmissions of activation request signaling of the first type of SRS.

[0363] The first type of SRS is the SRS type currently selected by the terminal, and the second type of SRS is an SRS type other than the first type, which is not limited in this application.

[0364] It should be understood that in the embodiment of the present application, switching from sending the first type of SRS to sending the second type of SRS can be replaced by: switching from using the first type of SRS resource (or, the first type of SRS resource configuration) to using the second type of SRS resource (or, the first type of SRS resource configuration). Among them, the SRS sent on the first type of SRS resource (or, using the first type of SRS resource configuration) is the first type of SRS, and the SRS sent on the second type of SRS resource (or, using the second type of SRS resource configuration) is the second type of SRS.

[0365] That is, the determining, according to the second information, whether to switch from sending the first type of SRS to sending the second type of SRS may be replaced by:

[0366] determining, according to the second information, whether to switch from using the first type of SRS resources to using the second type of SRS resources; or,

[0367] According to the second information, it is determined whether to switch from using the first type of SRS resource configuration to the second type of SRS resource configuration.

[0368] In other words, the terminal may switch the SRS, or switch the SRS resource, or switch the SRS resource configuration according to the second information.

[0369] In some embodiments, determining, based on the second information, whether to switch from sending the first type of SRS resources to sending the second type of SRS resources includes:

[0370] When a first condition is met, determining to switch from sending the first type of SRS to sending the second type of SRS; wherein the first condition includes at least one of the following:

[0371] A first timer corresponding to the first type of SRS times out;

[0372] The number of transmissions of the first type of SRS reaches a threshold of the number of transmissions of the SRS;

[0373] The TA corresponding to the first type of SRS is invalid, and the TA corresponding to the second type of SRS is valid;

[0374] The first type of SRS overlaps with an associated downlink reference signal or a common downlink channel;

[0375] The transmit power of the terminal is greater than a preset power threshold;

[0376] A measurement amount of a downlink reference signal associated with the first type of SRS is less than a measurement amount threshold;

[0377] The frequency interval between uplink transmission and downlink reception of the terminal is less than a frequency interval threshold;

[0378] The number of transmission times of the activation request signaling of the first type of SRS reaches a transmission times threshold of the activation request signaling.

[0379] In some embodiments, determining, based on the second information, whether to switch from sending the first type of SRS resources to sending the second type of SRS resources includes:

[0380] 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.

[0381] For example, the first condition includes the expiration of the first timer corresponding to the first type of SRS. In this case, the terminal may switch from sending the first type of SRS to sending 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, the terminal does not switch the SRS type, that is, continues to send the first type of SRS.

[0382] For another example, the first condition includes the first timer corresponding to the first type of SRS timing out and the number of transmissions of the first type of SRS reaching the SRS transmission number threshold. The terminal may switch from sending the first type of SRS to sending the second type of SRS when the first timer corresponding to the first type of SRS times out and the number of transmissions of the first type of SRS reaches the SRS transmission number threshold; or, when the first timer corresponding to the first type of SRS does not time out or the number of transmissions of the first type of SRS does not reach the SRS transmission number threshold, the SRS type is not switched, that is, the first type of SRS continues to be sent.

[0383] Two examples of the first condition are given above. When the first condition is other conditions mentioned above, or a combination of other conditions, the implementation method is similar and will not be repeated here.

[0384] 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:

[0385] When a second condition is met, determining not to switch from sending the first type of SRS to sending the second type of SRS, wherein the second condition includes at least one of the following:

[0386] A first timer corresponding to the first type of SRS has not timed out;

[0387] The number of transmissions of the first type of SRS does not reach a transmission number threshold;

[0388] The TA corresponding to the first type of SRS is valid;

[0389] The first type of SRS does not overlap with an associated downlink reference signal or a common downlink channel;

[0390] The transmit power of the terminal is less than a preset power threshold;

[0391] A measurement amount of a downlink reference signal associated with the first type of SRS is greater than a measurement amount threshold;

[0392] The frequency interval between uplink transmission and downlink reception of the terminal is greater than the frequency interval threshold;

[0393] The number of transmissions of the activation request signaling of the first type of SRS does not reach a transmission number threshold.

[0394] In some embodiments, determining, based on the second information, whether to switch from sending the first type of SRS resources to sending the second type of SRS resources includes:

[0395] 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.

[0396] For example, the second condition includes that the first timer corresponding to the first type of SRS has not timed out, then the terminal can switch from sending the first type of SRS to sending 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, the SRS type is not switched, that is, the first type of SRS continues to be sent.

[0397] For another example, the second condition includes that the first timer corresponding to the first type of SRS has not timed out and the number of transmissions of the first type of SRS has not reached the SRS transmission number threshold. In this case, the terminal may not switch the SRS type, that is, continue to send the first type of SRS, when the first timer corresponding to the first type of SRS has not timed out and the number of transmissions of the first type of SRS has not reached the SRS transmission number threshold; or, when the first timer corresponding to the first type of SRS times out or the number of transmissions of the first type of SRS reaches the SRS transmission number threshold, switch from sending the first type of SRS to sending the second type of SRS.

[0398] Two examples of the second condition are given above. When the second condition is other conditions mentioned above, or a combination of other conditions, the implementation method is similar and will not be repeated here.

[0399] In the embodiment 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.

[0400] The following describes the SRS switching method in conjunction with Example 2.

[0401] Embodiment 2-1: SRS is switched according to the overlap between the SRS and the associated downlink reference signal or common DL channel.

[0402] For example, if the terminal currently chooses to send the first type of SRS (for example, Type A SRS), the first type of SRS is associated with the first downlink reference signal, but the first type of SRS resource overlaps with the second downlink reference signal or the common DL channel, or the first type of SRS overlaps with the first downlink reference signal, wherein 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 choose to switch to the second type of SRS, or it can further determine whether to continue sending the first type of SRS or switch to sending the second type of SRS (for example, Type B SRS) based on other information (for example, the terminal's transmit power, the frequency interval between the terminal's uplink transmission and downlink reception).

[0403] In some embodiments, when at least one of the following conditions is met, the terminal chooses to continue sending the first type of SRS, that is, does not switch the SRS:

[0404] The terminal's transmit power is less than the reference transmit power threshold;

[0405] The frequency interval between the terminal's uplink transmission and downlink reception is greater than the frequency interval threshold.

[0406] When the transmit power of the terminal is less than the reference transmit power threshold, it indicates that the self-interference and / or cross-link interference caused by the terminal sending the first type of SRS is low. Therefore, the terminal may choose to continue sending the first type of SRS.

[0407] When the frequency interval between the uplink transmission and downlink reception of the terminal is greater than the frequency interval threshold, it means that the uplink transmission of the terminal has little impact on the downlink reception. Therefore, the terminal may choose to continue to send the first type of SRS.

[0408] Optionally, the reference power threshold may be specified by a protocol or configured by a network-side device.

[0409] In some embodiments, the terminal switches to sending the second type of SRS when at least one of the following conditions is met:

[0410] The terminal's transmit power is greater than the reference transmit power threshold;

[0411] The frequency interval between the terminal's uplink transmission and downlink reception is less than the frequency interval threshold.

[0412] When the terminal's transmit power is greater than the reference transmit power threshold, indicating that the terminal's uplink transmission has a greater impact on downlink reception, the terminal chooses to switch to the second type of SRS resources, which is beneficial to reducing self-interference and / or cross-link interference caused by the terminal's SRS transmission.

[0413] When the frequency interval between the terminal's uplink transmission and downlink reception is less than the frequency interval threshold, it means that the terminal's uplink transmission has a greater impact on the downlink reception. Therefore, the terminal chooses to switch to the second type of SRS, which can reduce the self-interference and / or cross-link interference caused by the terminal's SRS transmission.

[0414] Embodiment 2-2: Switching the SRS according to the validity of the SRS.

[0415] It can be understood that when a type of SRS is invalid, the network-side device cannot correctly receive the SRS of this type when it is sent, and thus the purpose of the SRS cannot be achieved.

[0416] In some embodiments, the validity of the SRS may be defined according to the time-frequency resource location where the SRS is located.

[0417] For example, if an SRS overlaps with both UL symbols and DL symbols, the SRS is an invalid SRS.

[0418] For another example, if an SRS overlaps with a UL subband and a UL symbol, the SRS is a valid SRS.

[0419] In some embodiments, the effectiveness of the SRS may be defined based on the interference of the SRS on other links.

[0420] For example, if the frequency interval between an SRS and a GB is smaller than a preset frequency interval threshold, in this case, the SRS will interfere with other links, and the SRS is considered to be an invalid SRS.

[0421] For another example, if the frequency interval between an SRS and a GB is greater than a preset frequency interval threshold, in this case, the SRS has little interference on other links, and the SRS is considered to be a valid SRS.

[0422] For another example, if an SRS overlaps with a full-duplex GB of a network-side device, in this case, the network-side device cannot correctly receive the SRS, and the SRS is considered to be an invalid SRS.

[0423] For another example, if an SRS overlaps with a full-duplex GB on the terminal side, in this case, the SRS will interfere with its own DL reception (if any), and the SRS is considered to be an invalid SRS.

[0424] In some embodiments, if the first type of SRS is an invalid SRS and the second type of SRS is a valid SRS, the terminal may determine to switch from transmitting the first type of SRS to transmitting the second type of SRS.

[0425] Embodiment 2-3: Switching the SRS is performed according to the validity of the TA corresponding to the SRS.

[0426] In some embodiments, different types of SRS are associated with different measurement signal sets (e.g., SSBs). The validity of the SRS TA can be determined by measuring the measurement signals in the associated measurement signal sets. Since different types of SRS may be associated with different measurement signal sets, the resulting TAs may also be different, and therefore the TA validity may also be different. Therefore, SRS resources can be selected based on the TA validity of the SRS resources, which is conducive to ensuring uplink transmission performance.

[0427] For example, if the terminal currently sends the first type of SRS, 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 becomes valid. In this case, the terminal can switch to sending the second type of SRS.

[0428] Optionally, when the TAs corresponding to the at least one type of SRS are all invalid, the terminal determines that the beam management for the non-connected state (beamManagementForNonConnected) fails and stops sending the SRS.

[0429] In this case, the beam used by the terminal to send Msg1 or Msg3 during the random access process may be determined by the terminal, for example, by randomly selecting a beam.

[0430] Optionally, the TA validity of the SRS is determined when at least one of the following conditions is met:

[0431] The RSRP of the stored DL reference signal and the RSRP of the currently used DL downlink reference signal are valid;

[0432] Compared with the RSRP of the stored DL reference signal, the change in the currently calculated RSRP of the DL reference signal is less than or equal to a preset threshold, where the preset threshold may be specified by a protocol or configured by a network-side device;

[0433] A predefined timer is running, for example, a timer for timing alignment (SRS-TimeAlignmentTimer) is running, indicating that the TA of the SRS corresponding to the timer is valid. After the timer times out, the TA corresponding to the SRS becomes invalid.

[0434] Embodiment 2-4: Switching the SRS according to the measurement amount of the downlink reference signal associated with the SRS.

[0435] Optionally, the network-side device may configure Type A SRS and Type B SRS to be associated with different downlink reference signals (such as SSB).

[0436] For example, when the terminal currently uses Type A SRS, and the measurement value (such as SS-RSRP) of the downlink reference signal associated with Type A SRS (such as SSB1) is less than the second measurement value threshold, but the measurement value (such as SS-RSRP) of the downlink reference signal associated with Type B SRS (SSB2) is greater than the second measurement value 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. The second measurement value threshold can be predefined or configured by the network side device.

[0437] For another example, the terminal currently uses 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 value threshold. In this case, the terminal may not switch the SRS.

[0438] In some scenarios, the terminal may be mobile, and the downlink reference signal measurement quantity obtained by the terminal may change. With this method, the terminal side can select the downlink reference signal with better signal quality for access, which is beneficial for the reception of DL channels / signals and UL channels / signals.

[0439] Optionally, when the measurement quantity of the downlink reference signal associated with the at least one type of SRS is less than the second measurement quantity threshold, the terminal determines that the beam management for the non-connected state (beamManagementForNonConnected) has failed and stops sending the SRS. In this case, the beam used by the terminal to send Msg1 or Msg3 during the random access process can be determined by the terminal, for example, by randomly selecting a beam.

[0440] Embodiment 2-5: SRS switching is performed according to the first timer corresponding to SRS (ie, SRS detection failure timer).

[0441] In some embodiments, the at least one type of SRS is respectively configured with a corresponding first timer, which is used to receive a response from a network-side device to the SRS after sending the SRS.

[0442] For example, if the terminal currently selects the first type of SRS, after the terminal sends the first type of SRS, a first timer is started. When the first timer expires, if the terminal does not receive a response from the network device for the SRS, it determines to switch the SRS, for example, to the second type of SRS. Alternatively, if the terminal receives a response from the network device for the SRS before the first timer expires, the first type of SRS continues to be used.

[0443] Embodiment 2-6: Switching the SRS is performed according to the number of SRS transmissions or the transmission time.

[0444] In some embodiments, each type of the at least one type of SRS corresponds to a transmission number threshold or a transmission time threshold. The transmission number thresholds or transmission time thresholds corresponding to different types of SRS may be the same or different.

[0445] For example, if the terminal currently selects the first type of SRS, and the number of transmissions of the first type of SRS reaches the transmission number threshold, or the transmission time of the first type of SRS reaches the transmission time threshold, it is determined to switch the SRS, for example, to the second type of SRS. Alternatively, if the first type of SRS does not reach the transmission number threshold, or the transmission time of the first type of SRS reaches the transmission time threshold, the terminal can continue to use the first type of SRS.

[0446] Embodiment 2-7: SRS is switched according to the number of transmissions of the activation request signaling of the SRS resource.

[0447] In some embodiments, activation request signaling for each type of SRS resource corresponds to a transmission count threshold. The transmission count thresholds corresponding to activation request signaling for different types of SRS resources may be the same or different. The transmission count thresholds for activation request signaling may be specified by a protocol or configured by a network-side device.

[0448] For example, if a terminal requests activation of an SRS resource through activation request signaling, and if the terminal currently selects a first type of SRS resource and the number of transmissions of the activation request signaling for the first type of SRS resource exceeds or is not less than a transmission number threshold of the activation request signaling, the terminal switches to another type of SRS resource, such as a second type of SRS resource. Alternatively, if the number of transmissions of the activation request signaling for 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.

[0449] Embodiment 2-8: Switching the SRS is performed according to the time period of the SRS resource.

[0450] For example, each type of SRS resource corresponds to a corresponding time period (or, in other words, validity period), and the terminal can switch the SRS according to the time period corresponding to the SRS resource. For example, within the time period corresponding to a certain type of SRS resource, the SRS resource of this type 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 time period corresponding to each type of SRS resource can be the same length, or can be different.

[0451] Optionally, the terminal may use the at least one type of SRS resource in sequence according to a certain order, wherein each type of SRS resource corresponds to a certain time period.

[0452] Optionally, the time period may be a PRACH configuration period. For example, within a time period (e.g., a PRACH configuration period), the terminal selects a Type B SRS resource to transmit an SRS. If the terminal fails to successfully receive Msg2 and enters the next time period, the terminal selects an SRS resource type corresponding to the next time period, for example, preferentially selecting the first available SRS resource in this SRS resource type.

[0453] It should be noted that the above SRS type switching method is only an example. The terminal can also switch the SRS type in combination with other information, and this application does not limit this. 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. The first type of SRS is associated with the first downlink reference signal, and the second type of SRS is associated with the second downlink reference signal. The first downlink reference signal corresponds to the first priority, and the second downlink reference signal corresponds to the second priority, and the first priority is higher than the second priority. Alternatively, the type of the first downlink reference signal is type X, and the type of the second downlink reference signal is type Y. Alternatively, the first downlink reference signal supports the first service type, and the second downlink reference signal supports the second service type. Alternatively, the first downlink reference signal supports the first access state, and the second downlink reference signal supports the 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 the appropriate SRS type based on the current service type / access state type, etc.

[0454] Optionally, the preset condition may include, but is not limited to, at least one of the following:

[0455] The TA corresponding to the first type of SRS fails;

[0456] The number of transmissions of the first type of SRS reaches a transmission number threshold;

[0457] The first timer corresponding to the first type of SRS times out;

[0458] The measurement value of the first downlink reference signal is less than the measurement value threshold.

[0459] In some embodiments, it can also be considered that when the aforementioned first condition is met, the first type of SRS resources are deactivated and the second type of SRS resources are deactivated, that is, the first condition can be considered as the deactivation condition of the first type of SRS resources and the activation condition of the second type of SRS resources.

[0460] In some embodiments of the present application, the method 200 further includes:

[0461] When the third condition is met, the terminal determines that the beam management in the non-connected state fails and stops sending the SRS:

[0462] The third condition includes at least one of the following:

[0463] The first timers corresponding to the at least one type of SRS resources all time out;

[0464] The count values ​​of the first counter corresponding to the at least one type of SRS resource all reach the transmission number threshold;

[0465] TA average efficiency corresponding to the at least one type of SRS resources;

[0466] The measurement quantities of the reference signals associated with the at least one type of SRS resources are all smaller than a third measurement quantity threshold.

[0467] In this case, the beam used by the terminal to send Msg1 or Msg3 during the random access process may be determined by the terminal, for example, by randomly selecting a beam.

[0468] In the embodiment of the present application, the first measurement quantity threshold, the second measurement quantity threshold and the third measurement quantity threshold may be the same, or may be different.

[0469] In summary, in this embodiment of the present application, SRS resources corresponding to at least one type of SRS can be configured, where the SRS resources include at least one of the following: an uplink subband within a downlink time unit; a flexible time unit; an uplink subband within a flexible time unit; a non-downlink subband within a flexible time unit; an uplink time unit; and a non-downlink subband within an uplink time unit. The terminal can transmit the SRS based on this SRS resource, thereby enabling SRS transmission in duplex mode, improving system resource utilization, and reducing SRS transmission latency.

[0470] The above text, in combination with Figures 6 to 14, describes in detail the method embodiment of the present application. The following text, in combination with Figures 15 to 19, describes in detail the device embodiment of the present application. It should be understood that the device embodiment and the method embodiment correspond to each other, and similar descriptions can refer to the method embodiment.

[0471] The configuration method of the SRS in duplex mode provided in the embodiment of the present application can be executed by the configuration device of the SRS in duplex mode. In the embodiment of the present application, the configuration method of the SRS in duplex mode performed by the configuration device of the SRS in duplex mode is taken as an example to illustrate the configuration device of the SRS in duplex mode provided in the embodiment of the present application.

[0472] FIG15 shows a schematic block diagram of an apparatus 500 for configuring SRS in duplex mode according to an embodiment of the present application. As shown in FIG15 , the apparatus 500 includes:

[0473] The communication unit 510 is 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

[0474] Send the SRS according to the SRS resource; wherein the SRS resource includes at least one of the following:

[0475] Uplink subband within the downlink time unit;

[0476] Flexible time units;

[0477] Uplink subband within flexible time unit;

[0478] Non-downlink sub-band within the flexible time unit;

[0479] Uplink time unit;

[0480] Non-downlink subband within the uplink time unit.

[0481] In some embodiments, the at least one type of SRS includes at least one of the following types:

[0482] SRS located on different frequency domain resources;

[0483] SRS needs to be activated;

[0484] No SRS activation required;

[0485] SRS for different business types;

[0486] SRS for different purposes;

[0487] SRS for different terminal types;

[0488] SRS on flexible time units;

[0489] SRS that overlaps with downlink reference signal resources;

[0490] SRS that does not overlap with downlink reference signal resources;

[0491] SRS on the upstream sub-band;

[0492] SRS on uplink time unit.

[0493] In some embodiments, the communication unit 510 is further configured to:

[0494] 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, sending the SRS on a time-frequency resource other than the downlink subband on the flexible time unit; or

[0495] When the time domain resource of the SRS is a flexible time unit and an uplink subband is configured on the flexible time unit, sending the SRS on the uplink subband on the flexible time unit; or

[0496] When the time domain resource of the SRS is a flexible time unit and no uplink subband and downlink subband are configured on the flexible time unit, the SRS is sent on the time-frequency resource on the flexible time unit.

[0497] In some embodiments, the apparatus 500 further includes:

[0498] A processing unit, configured to select, from the at least one type of SRS according to the first information, an SRS of a target type for transmission;

[0499] The first information includes at least one of the following:

[0500] downlink reference signal measurement quantity;

[0501] an order of SRS resources corresponding to the at least one type of SRS;

[0502] Whether the SRS resource corresponding to the at least one type of SRS is activated or deactivated;

[0503] a priority of the at least one type of SRS;

[0504] Information of a downlink reference signal associated with the at least one type of SRS;

[0505] Bandwidth information of the terminal;

[0506] carrier information of the terminal;

[0507] Bandwidth part BWP information of the terminal;

[0508] capability information of the terminal;

[0509] The access status of the terminal;

[0510] The service type of the service to be transmitted by the terminal.

[0511] In some embodiments, the order of SRS resources corresponding to the at least one type of SRS includes at least one of the following:

[0512] The time order of SRS resources and the frequency order of SRS resources.

[0513] 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:

[0514] Whether the downlink reference signal associated with the at least one type of SRS is valid or invalid;

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

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

[0517] The service type supported by the downlink reference signal or frequency associated with the at least one type of SRS;

[0518] The access status supported by the downlink reference signal or frequency point associated with the at least one type of SRS.

[0519] In some embodiments, the bandwidth information of the terminal includes at least one of SRS type information supported by the terminal under the target bandwidth and whether the terminal supports a duplex mode; or

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

[0521] The BWP information of the terminal includes at least one of SRS type information supported by the terminal under the target BWP and whether the terminal supports a duplex mode; or

[0522] The capability information of the terminal includes at least one of information on an SRS type supported by the terminal and information on whether the terminal supports a duplex mode.

[0523] In some embodiments, the at least one type of SRS has the following association relationship with the downlink reference signal:

[0524] A downlink reference signal is associated with at least an SRS on an uplink time unit and an SRS on an uplink subband.

[0525] In some embodiments, each type of SRS in the at least one type corresponds to a transmission number threshold of the SRS; or

[0526] Each type of SRS in the at least one type corresponds to a first timer, which is used to determine a maximum time length for receiving a response of a network-side device to a sent SRS.

[0527] In some embodiments, the apparatus 500 further includes:

[0528] a processing unit, configured to determine, based on second information, whether to switch from sending a first type of SRS to sending a second type of SRS, wherein the first type is an SRS type currently selected by the terminal;

[0529] The second information includes at least one of the following:

[0530] a first timer corresponding to the first type of SRS;

[0531] the number of transmissions of the first type of SRS;

[0532] validity of the timing advance TA corresponding to the first type of SRS;

[0533] whether the first type of SRS overlaps with an associated downlink reference signal or a common downlink channel;

[0534] a measurement amount of a downlink reference signal associated with the first type of SRS;

[0535] the transmit power of the terminal;

[0536] The frequency interval between uplink transmission and downlink reception of the terminal;

[0537] The number of transmissions of activation request signaling of the first type of SRS.

[0538] In some embodiments, the processing unit is further configured to:

[0539] When a first condition is met, determining to switch from sending the first type of SRS to sending the second type of SRS; wherein the first condition includes at least one of the following:

[0540] A first timer corresponding to the first type of SRS times out;

[0541] The number of transmissions of the first type of SRS reaches a threshold of the number of transmissions of the SRS;

[0542] The TA corresponding to the first type of SRS is invalid, and the TA corresponding to the second type of SRS is valid;

[0543] The first type of SRS overlaps with an associated downlink reference signal or a common downlink channel;

[0544] The transmit power of the terminal is greater than a preset power threshold;

[0545] A measurement amount of a downlink reference signal associated with the first type of SRS is less than a measurement amount threshold;

[0546] The frequency interval between uplink transmission and downlink reception of the terminal is less than a frequency interval threshold;

[0547] The number of transmission times of the activation request signaling of the first type of SRS reaches a transmission times threshold of the activation request signaling.

[0548] In some embodiments, the processing unit is further configured to:

[0549] When a second condition is met, determining not to switch from sending the first type of SRS to sending the second type of SRS, wherein the second condition includes at least one of the following:

[0550] A first timer corresponding to the first type of SRS has not timed out;

[0551] The number of transmissions of the first type of SRS does not reach a transmission number threshold;

[0552] The TA corresponding to the first type of SRS is valid;

[0553] The first type of SRS does not overlap with an associated downlink reference signal or a common downlink channel;

[0554] The transmit power of the terminal is less than a preset power threshold;

[0555] A measurement amount of a downlink reference signal associated with the first type of SRS is greater than a measurement amount threshold;

[0556] The frequency interval between uplink transmission and downlink reception of the terminal is greater than the frequency interval threshold;

[0557] The number of transmissions of the activation request signaling of the first type of SRS does not reach a transmission number threshold.

[0558] In some embodiments, the priorities of downlink reference signals associated with the first type of SRS and the second type of SRS are different; or

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

[0560] The downlink reference signals associated with the first type of SRS and the second type of SRS support different service types; or

[0561] The downlink reference signals associated with the first type of SRS and the second type of SRS support different access states.

[0562] In some embodiments, the processing unit is further configured to:

[0563] When the third condition is met, the terminal determines that the beam management in the non-connected state fails, and determines to stop sending the SRS:

[0564] The third condition includes at least one of the following:

[0565] The first timer corresponding to the at least one type of SRS times out;

[0566] The number of transmissions of the at least one type of SRS reaches a corresponding transmission number threshold;

[0567] The TA average effect corresponding to the at least one type of SRS;

[0568] The measurement amount of the reference signal associated with the at least one type of SRS is less than the measurement amount threshold.

[0569] In some embodiments, the first configuration information is further used to configure at least one of the following:

[0570] the use of the at least one type of SRS;

[0571] a periodicity of the at least one type of SRS;

[0572] an association relationship between the at least one type of SRS and a response sequence;

[0573] The time-frequency resource information of the response sequence corresponding to the at least one type of SRS.

[0574] Optionally, in some embodiments, the communication unit may be a communication interface or a transceiver, or an input / output interface of a communication chip or a system on chip.

[0575] It should be understood that the device 500 according to the embodiment of the present application may correspond to the terminal in the method embodiment of the present application, and the above-mentioned and other operations and / or functions of each unit in the device 500 are respectively for realizing the corresponding processes of the terminal in the method embodiment shown in Figures 6 to 14 and achieving the same technical effects. To avoid repetition, they will not be repeated here.

[0576] FIG16 shows a schematic block diagram of an apparatus 600 for configuring SRS in duplex mode according to an embodiment of the present application. As shown in FIG16 , the apparatus 600 includes:

[0577] The communication unit 610 is 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;

[0578] The SRS resource includes at least one of the following:

[0579] Uplink subband within the downlink time unit;

[0580] Flexible time units;

[0581] Uplink subband within flexible time unit;

[0582] Non-downlink sub-band within the flexible time unit;

[0583] Uplink time unit;

[0584] Non-downlink subband within the uplink time unit.

[0585] In some embodiments, the at least one type of SRS includes at least one of the following types:

[0586] SRS located on different frequency domain resources;

[0587] SRS needs to be activated;

[0588] No SRS activation required;

[0589] SRS for different business types;

[0590] SRS for different purposes;

[0591] SRS for different terminal types;

[0592] SRS on flexible time units;

[0593] SRS that overlaps with downlink reference signal resources;

[0594] SRS that does not overlap with downlink reference signal resources;

[0595] SRS on the upstream sub-band;

[0596] SRS on uplink time unit.

[0597] In some embodiments, the at least one type of SRS has the following association relationship with the downlink reference signal:

[0598] A downlink reference signal is associated with at least an SRS on an uplink time unit and an SRS on an uplink subband.

[0599] In some embodiments, each type of SRS in the at least one type corresponds to a transmission number threshold of the SRS; or

[0600] Each type of SRS in the at least one type corresponds to a first timer, which is used to determine a maximum time length for receiving a response of a network-side device to a sent SRS.

[0601] Optionally, in some embodiments, the communication unit may be a communication interface or a transceiver, or an input / output interface of a communication chip or a system on chip.

[0602] It should be understood that the device 600 according to the embodiment of the present application may correspond to the network side device in the method embodiment of the present application, and the above-mentioned and other operations and / or functions of each unit in the device 600 are respectively for realizing the corresponding processes of the network side device in the method embodiment shown in Figures 6 to 14, and achieving the same technical effects. To avoid repetition, they will not be repeated here.

[0603] In some embodiments, the apparatus 500 and apparatus 600 in the embodiments of the present application may be electronic devices, such as electronic devices with an operating system, or components in electronic devices, such as integrated circuits or chips. The electronic device may be a terminal or other device other than a terminal. For example, the terminal may include but is not limited to the types of terminal 11 listed above, and other devices may be servers, network attached storage (NAS), etc., which are not specifically limited in the embodiments of the present application.

[0604] As shown in Figure 17, an embodiment of the present application further provides a communication device 1000, including a processor 1001 and a memory 1002, wherein the memory 1002 stores a program or instruction that can be run on the processor 1001. For example, when the communication device 1000 is a terminal, the program or instruction, when executed by the processor 1001, implements the steps performed by the terminal in the above-mentioned reasoning method embodiment, and can achieve the same technical effect. For example, when the communication device 1000 is a network-side device, the program or instruction, when executed by the processor 1001, implements the steps performed by the network-side device in the above-mentioned reasoning method embodiment, and can achieve the same technical effect.

[0605] The present application also provides a terminal including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is configured to execute a program or instruction to implement the steps in the method embodiments shown in Figures 6 to 14. This terminal embodiment corresponds to the aforementioned terminal-side method embodiment, and each implementation process and implementation method of the aforementioned method embodiment can be applied to this terminal embodiment and achieve the same technical effects. Specifically, Figure 18 is a schematic diagram of the hardware structure of a terminal implementing an embodiment of the present application.

[0606] The terminal 1100 includes but is not limited to: 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 at least some of the components of the processor 1110.

[0607] Those skilled in the art will appreciate that the terminal 1100 may also include a power supply (such as a battery) to power various components. The power supply may be logically connected to the processor 1110 via a power management system, thereby implementing functions such as charging, discharging, and power consumption management through the power management system. The terminal structure shown in FIG18 does not constitute a limitation of the terminal. The terminal may include more or fewer components than shown, or combine certain components, or have different component arrangements, which will not be described in detail here.

[0608] It should be understood that in an embodiment of the present application, the input unit 1104 may include a graphics processing unit (GPU) 11041 and a microphone 11042, and the graphics processor 11041 processes the image data of a static picture or video 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 a touch panel 11071 and at least one of other input devices 11072. The touch panel 11071 is also called a touch screen. The touch panel 11071 may include two parts: a touch detection device and a touch controller. 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, and a joystick, which will not be repeated here.

[0609] In the embodiment of the present application, after receiving downlink data from a network-side device, the RF unit 1101 may transmit the data to the processor 1110 for processing. Furthermore, the RF unit 1101 may send uplink data to the network-side device. Typically, the RF unit 1101 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, and the like.

[0610] 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, wherein the first storage area may store an operating system, applications 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 random access memory (RAM), static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct RAM bus random access memory (DRRAM). The memory 1109 in the embodiment of the present application includes but is not limited to these and any other suitable types of memory.

[0611] Processor 1110 may include one or more processing units. Optionally, processor 1110 integrates an application processor and a modem processor. The application processor primarily handles operations related to the operating system, user interface, and application programs, while the modem processor primarily processes wireless communication signals, such as a baseband processor. It is understood that the modem processor may not be integrated into processor 1110.

[0612] It can be understood that the implementation process of each implementation method mentioned in this embodiment can refer to the relevant description of the method embodiments shown in Figures 6 to 14, and achieve the same or corresponding technical effects. To avoid repetition, they will not be repeated here.

[0613] The present application also provides a network-side device, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is configured to execute a program or instruction to implement the steps of the method embodiments shown in Figures 6 to 14. This network-side device embodiment corresponds to the above-mentioned access network device-side or core network function-side method embodiments, and each implementation process and implementation method of the above-mentioned method embodiments are applicable to this network-side device embodiment and can achieve the same technical effects.

[0614] Specifically, embodiments of the present application also provide a network-side device. As shown in Figure 19, 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. Antenna 1201 is connected to radio frequency device 1202. In the uplink direction, radio frequency device 1202 receives information via antenna 1201 and sends the received information to baseband device 1203 for processing. In the downlink direction, baseband device 1203 processes the information to be transmitted and sends it to radio frequency device 1202. Radio frequency device 1202 processes the received information and then sends it through antenna 1201.

[0615] The method executed by the network-side device in the above embodiment may be implemented in the baseband device 1203 , which includes a baseband processor.

[0616] The baseband device 1203 may include, for example, at least one baseband board, on which multiple chips are arranged, as shown in Figure 19, 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 embodiment.

[0617] The network side device may further include a network interface 1206 , which is, for example, a Common Public Radio Interface (CPRI).

[0618] Specifically, the network side device 1200 of the embodiment of the present application also includes: instructions or programs stored in the memory 1205 and executable on the processor 1204. The processor 1204 calls the instructions or programs in the memory 1205 to execute the method of execution of each module shown in Figure 16 and achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0619] An embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, each process of the embodiment of the configuration method of SRS in the above-mentioned duplex mode is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0620] The processor is a processor in the SRS configuration device, communication device, terminal, or network-side device in duplex mode described in the above embodiments. The readable storage medium includes a computer-readable storage medium, such as a computer read-only memory (ROM), random access memory (RAM), a magnetic disk, or an optical disk. In some examples, the readable storage medium may be a non-transitory readable storage medium.

[0621] The processors mentioned in the embodiments of the present application may include general-purpose processors, special-purpose processors, etc., such as a central processing unit (CPU), a microprocessor, a digital signal processor (DSP), an artificial intelligence (AI) processor, a graphics processing unit (GPU), an application-specific integrated circuit (ASIC), a network processor (NP), a field programmable gate array (FPGA), or other programmable logic devices, gate circuits, transistors, discrete hardware components, etc.

[0622] An embodiment of the present application further provides a chip, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the various processes of the above-mentioned SRS configuration method embodiment in duplex mode, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0623] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0624] An embodiment of the present application further 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 the various processes of the above-mentioned embodiment of the SRS configuration method in duplex mode, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0625] An embodiment of the present application further provides a communication system, including: a terminal and a network side device, wherein the terminal can be used to execute the steps of the SRS configuration method in duplex mode as described above, and the network side device can be used to execute the steps of the SRS configuration method in duplex mode as described above.

[0626] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the 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 the opposite order according to the functions involved. For example, the described method may be performed in an order different from that described, and various steps may also be added, omitted or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0627] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of a computer software product plus a necessary general-purpose hardware platform, or of course, by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, magnetic disk, optical disk, etc.) and includes a number of instructions for enabling a terminal or network-side device to execute the methods described in each embodiment of the present application.

[0628] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms of implementation methods without departing from the purpose of this application and the scope of protection of the claims. These implementation methods are all within the protection of this application.

Claims

1. A method for configuring SRS in duplex mode, wherein: include: The terminal receives first configuration information from a network side device, where the first configuration information is used to configure an SRS resource corresponding to at least one type of sounding reference signal SRS; The terminal sends the SRS according to the SRS resource; wherein the SRS resource includes at least one of the following: Uplink subband within downlink time unit; Flexible time units; Uplink subband within flexible time unit; Non-downlink subbands within the flexible time unit; Uplink time unit; Non-downlink subband within the uplink time unit.

2. The method according to claim 1, wherein: The at least one type of SRS includes at least one of the following types: SRS located on different frequency domain resources; SRS needs to be activated; No SRS activation required; SRS for different types of services; SRS for different purposes; SRS for different terminal types; SRS on flexible time units; SRS overlapping with downlink reference signal resources; SRS that does not overlap with downlink reference signal resources; SRS on the upstream subband; SRS on the uplink time unit.

3. The method according to claim 2, wherein: The method further comprises: 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, the terminal sends the SRS on a time-frequency resource other than the downlink subband on the flexible time unit; or When the time domain resource of the SRS is a flexible time unit and an uplink subband is configured on the flexible time unit, the terminal sends the SRS on the uplink subband on the flexible time unit; or When the time domain resource of the SRS is a flexible time unit and no uplink subband and downlink subband are 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 to 3, wherein: The method further comprises: Selecting, according to the first information, an SRS of a target type for sending from the at least one type of SRS; The first information includes at least one of the following: downlink reference signal measurement quantity; an order of SRS resources corresponding to the at least one type of SRS; Whether the SRS resource corresponding to the at least one type of SRS is activated or deactivated; a priority of the at least one type of SRS; Information of a downlink reference signal associated with the at least one type of SRS; Bandwidth information of the terminal; Carrier information of the terminal; Bandwidth part BWP information of the terminal; 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, wherein: The order of SRS resources corresponding to the at least one type of SRS includes at least one of the following: The time order of SRS resources and the frequency order of SRS resources.

6. The method according to claim 4 or 5, wherein: The information of the downlink reference signal associated with the at least one type of SRS includes at least one of the following: Whether the at least one type of SRS-associated downlink reference signal is valid or invalid; The priority of the downlink reference signal or frequency associated with the at least one type of SRS; The type of downlink reference signal or frequency associated with the at least one type of SRS; The service type supported by the downlink reference signal or frequency associated with the at least one type of SRS; The at least one type of SRS-associated downlink reference signal or access status supported by the frequency point.

7. The method according to any one of claims 4 to 6, wherein: The bandwidth information of the terminal includes at least one of 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 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 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 information on SRS types supported by the terminal and whether the terminal supports a duplex mode.

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

9. The method according to any one of claims 1 to 8, wherein: Each type of SRS in the at least one type corresponds to a transmission number threshold of the SRS; or Each type of SRS in the at least one type corresponds to a first timer, which is used to determine a maximum time length for receiving a response of a network-side device to a sent SRS.

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

11. The method according to claim 10, wherein: The determining, according to the second information, whether to switch from sending the first type of SRS to sending the second type of SRS includes: When a first condition is met, determining to switch from sending the first type of SRS to sending the second type of SRS; wherein the first condition includes at least one of the following: A first timer corresponding to the first type of SRS times out; The number of transmissions of the first type of SRS reaches a threshold of the number of transmissions of the 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 an associated downlink reference signal or a common downlink channel; The transmission power of the terminal is greater than a preset power threshold; A measurement amount of a downlink reference signal associated with the first type of SRS is less than a measurement amount threshold; The frequency interval between uplink transmission and downlink reception of the terminal is less than the frequency interval threshold; The number of transmissions of the activation request signaling of the first type of SRS reaches a transmission number threshold of the activation request signaling.

12. The method according to claim 10, wherein: The determining, according to the second information, whether to switch from sending the first type of SRS to sending the second type of SRS includes: When a second condition is met, determining not to switch from sending the first type of SRS to sending the second type of SRS: wherein the second condition includes at least one of the following: A first timer corresponding to the first type of SRS has not timed out; The number of transmissions of the first type of SRS does not reach a transmission number threshold; The TA corresponding to the first type of SRS is valid; The first type of SRS does not overlap with an associated downlink reference signal or a common downlink channel; The transmission power of the terminal is less than a preset power threshold; A measurement amount of a downlink reference signal associated with the first type of SRS is greater than a measurement amount threshold; The frequency interval between uplink transmission and downlink reception of the terminal is greater than the frequency interval threshold; The transmission number of activation request signaling of the first type of SRS does not reach a transmission number threshold.

13. The method according to any one of claims 10 to 12, wherein: The priorities of downlink reference signals associated with the first type of SRS and the second type of SRS are different; or The types of downlink reference signals associated with the first type of SRS and the second type of SRS are different; or The downlink reference signals associated with the first type of SRS and the second type of SRS support different service types; or The downlink reference signals associated with the first type of SRS and the second type of SRS support different access states.

14. The method according to any one of claims 1 to 13, wherein: The method further comprises: When the third condition is met, the terminal determines that the beam management in the non-connected state fails, and stops sending the SRS: The third condition includes at least one of the following: The first timers corresponding to the at least one type of SRS all time out; The number of transmissions of the at least one type of SRS reaches a corresponding transmission number threshold; The TA average effect corresponding to the at least one type of SRS; The measurement amount of the reference signal associated with the at least one type of SRS is less than the measurement amount threshold.

15. The method according to any one of claims 1 to 14, wherein: The first configuration information is also used to configure at least one of the following: the purpose of the at least one type of SRS; a periodicity of the at least one type of SRS; an association relationship between the at least one type of SRS and a 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 to 7, wherein: The method further comprises: The terminal uses X pieces of spatial relationship information to send the SRS of the target type, wherein the X pieces of spatial relationship information are selected from Y pieces of spatial relationship information indicated by a network side device, X and Y are positive integers, and X≤Y.

17. A method for transmitting SRS in duplex mode, wherein: include: The network side device sends first configuration information to the terminal, where the first configuration information is used to configure an SRS resource corresponding to at least one type of SRS; The SRS resource includes at least one of the following: Uplink subband within downlink time unit; Flexible time units; Uplink subband within flexible time unit; Non-downlink subbands within the flexible time unit; Uplink time unit; Non-downlink subband within the uplink time unit.

18. A device for transmitting SRS in duplex mode, wherein: include: A communication unit, configured to receive first configuration information from a network side device, where the first configuration information is used to configure an SRS resource corresponding to at least one type of sounding reference signal SRS; as well as The SRS is sent according to the SRS resource; wherein the SRS resource includes at least one of the following: Uplink subband within downlink time unit; Flexible time units; Uplink subband within flexible time unit; Non-downlink subbands within the flexible time unit; Uplink time unit; Non-downlink subband within the uplink time unit.

19. A device for transmitting SRS in duplex mode, wherein: include: A communication unit, configured to send first configuration information to a terminal, where the first configuration information is used to configure an SRS resource corresponding to at least one type of sounding reference signal SRS; The SRS resource includes at least one of the following: Uplink subband within downlink time unit; Flexible time units; Uplink subband within flexible time unit; Non-downlink subbands within the flexible time unit; Uplink time unit; Non-downlink subband within the uplink time unit.

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

21. A readable storage medium, wherein: The readable storage medium stores a program or an instruction, and when the program or the instruction is executed by a processor, the steps in the method according to any one of claims 1 to 16 or the steps in the method according to claim 17 are implemented.

22. A chip, wherein: The chip includes 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 the steps in the method according to any one of claims 1 to 16, or the steps in the method according to claim 17.

23. A computer program product, wherein: The computer program product is stored in a storage medium, and the computer program product is executed by at least one processor to implement the steps in the method according to any one of claims 1 to 16, or the steps in the method according to claim 17.

24. A computer program, wherein The computer program is stored in a storage medium, and the computer program is executed by at least one processor to implement 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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