Communication method, terminal equipment and network equipment

Abstract

The invention provides a communication method, terminal equipment and network equipment. The method comprises: a terminal device receiving first information sent by a network device, the first information being used for triggering receiving or sending of a target signal, the target signal comprising one or more of the following: an uplink reference signal; a downlink reference signal; a CSI; wherein the first information is sent by the network equipment in an uplink random access process; or the first information is sent by the network equipment in the process that the auxiliary cell is activated or quits the dormant state. The first information used for triggering the uplink reference signal, the downlink reference signal or the CSI is transmitted in advance to an uplink random access process, an auxiliary cell activation process or an auxiliary cell quit a dormant state, so that the signals are transmitted as early as possible, the transmission delay of the signals is reduced, and the transmission efficiency is improved. And the time delay from the state switching of the terminal equipment to the channel detection is shortened, so that the network decision is facilitated.

Description

Technical Field

[0001] This application relates to the field of communication technology, and more specifically, to a communication method, terminal equipment, and network equipment. Background Technology

[0002] Channel state information (CSI) reporting is a critical process in wireless communication systems. It is used to feed back the receiver's (e.g., terminal equipment) estimate of the wireless channel state to the transmitter (e.g., base station) to enable optimization operations such as link adaptation, beamforming, and resource scheduling. For the uplink, this can also be achieved by measuring the sounding reference signal (SRS). The measurement and reporting of these SRS typically include periodic, aperiodic, and semi-persistent types. Each type of SRS measurement and reporting requires separate configuration. For example, the network device might first send out complete configuration information, and then trigger CSI measurement and reporting via DCI or MAC CE. This approach may result in additional waiting time, causing delays in channel detection and thus affecting network decision-making. Summary of the Invention

[0003] This application provides a communication method, a terminal device, and a network device. The various aspects covered by this application are described below.

[0004] In a first aspect, a communication method is provided, comprising: a terminal device receiving first information sent by a network device, the first information being used to trigger the reception or transmission of a target signal, the target signal including one or more of the following: an uplink reference signal; a downlink reference signal; a CSI; wherein the first information is sent by the network device during an uplink random access process; or, the first information is sent by the network device during a secondary cell activation or exit from a dormant state process.

[0005] In a second aspect, a communication method is provided, comprising: a network device sending first information to a terminal device, the first information being used to trigger the reception or transmission of a target signal, the target signal including one or more of the following: an uplink reference signal; a downlink reference signal; a CSI; wherein the first information is sent by the network device during an uplink random access process; or, the first information is sent by the network device during a secondary cell activation or exit from a dormant state process.

[0006] Thirdly, a terminal device is provided, comprising: a transceiver unit, configured to receive first information sent by a network device, the first information being used to trigger the reception or transmission of a target signal, the target signal including one or more of the following: an uplink reference signal; a downlink reference signal; a CSI; wherein the first information is sent by the network device during an uplink random access process; or, the first information is sent by the network device during a secondary cell activation or exit from a dormant state process.

[0007] Fourthly, a network device is provided, comprising: a transceiver unit, configured to send first information to a terminal device, the first information being used to trigger the reception or transmission of a target signal, the target signal including one or more of the following: an uplink reference signal; a downlink reference signal; a CSI; wherein the first information is sent by the network device during uplink random access; or, the first information is sent by the network device during secondary cell activation or exit from dormancy.

[0008] Fifthly, a terminal device is provided, including a transceiver, a memory, and a processor, wherein the memory is used to store a program, and the processor is used to invoke the program in the memory and control the transceiver to receive or send signals so that the terminal device performs the method as described in the first aspect.

[0009] In a sixth aspect, a network device is provided, including a transceiver, a memory, and a processor, wherein the memory is used to store a program, and the processor is used to invoke the program in the memory and control the transceiver to receive or transmit signals so that the network device performs the method as described in the second aspect.

[0010] A seventh aspect provides an apparatus including a processor for calling a program from a memory to cause the apparatus to perform the method as described in the first or second aspect.

[0011] Eighthly, a chip is provided, including a processor for calling a program from memory to cause a device having the chip mounted to perform the method as described in the first or second aspect.

[0012] Ninth aspect, a computer-readable storage medium is provided having a program stored thereon that causes a computer to perform the method as described in the first or second aspect.

[0013] A tenth aspect provides a computer program product, including a program that causes a computer to perform the method as described in the first or second aspect.

[0014] Eleventhly, a computer program is provided that causes a computer to perform the method as described in the first or second aspect.

[0015] In this embodiment, the first information used to trigger the uplink reference signal, downlink reference signal, or CSI is transmitted in advance during the uplink random access process, secondary cell activation, or secondary cell exiting dormancy. This allows these signals to be transmitted as early as possible, reducing their transmission delay and shortening the time delay between the state switch of the terminal device and channel detection, which is beneficial for network decision-making. Attached Figure Description

[0016] Figure 1 This is a system architecture example diagram of a communication system applicable to embodiments of this application.

[0017] Figure 2 This is a flowchart illustrating the communication method according to an embodiment of this application.

[0018] Figure 3 This is a schematic diagram illustrating the triggering times of SRS, CSR-RS, and CSI during a possible secondary cell activation process.

[0019] Figure 4 This is a schematic diagram illustrating the triggering times of SRS, CSR-RS, and CSI during another possible secondary cell activation process.

[0020] Figure 5 This is a schematic diagram illustrating the triggering times of SRS, CSR-RS, and CSI during another possible secondary cell activation process.

[0021] Figure 6 This is a schematic diagram of the structure of a terminal device according to an embodiment of this application.

[0022] Figure 7 This is a schematic diagram of the structure of a network device according to an embodiment of this application.

[0023] Figure 8 This is a schematic diagram of a communication apparatus according to an embodiment of this application. Detailed Implementation

[0024] The technical solutions in this application will now be described with reference to the accompanying drawings.

[0025] Communication system

[0026] Figure 1This is an example diagram of the system architecture of a communication system 100 applicable to embodiments of this application. The communication system 100 may include a network device 110 and a terminal device 120. The network device 110 may be a device that communicates with the terminal device 120. The network device 110 can provide network coverage for a specific geographical area and can communicate with the terminal device 120 located within that coverage area. The terminal device 120 can access a network, such as a wireless network, through the network device 110. Optionally, the communication system 100 may also include other network entities such as a network controller and a mobility management entity; this application embodiment does not limit this.

[0027] It should be understood that the technical solutions of the embodiments of this application can be applied to various communication systems, such as: fifth-generation (5G) systems, new radio (NR), long-term evolution (LTE) systems, LTE frequency division duplex (FDD) systems, LTE time division duplex (TDD) systems, etc. The technical solutions provided in this application can also be applied to future communication systems, such as sixth-generation mobile communication systems, satellite communication systems, and so on.

[0028] The technical solutions of this application embodiment can also be applied to communication systems such as wireless local area networks (WLAN), wireless fidelity (WIFI), and high-performance radio local area networks (HIPELAN). The technical solutions provided in this application embodiment can be applied to communication systems using the 802.11 standard. For example, the 802.11 standard includes, but is not limited to, the 802.11ax standard, the 802.11be standard, the 802.11bn standard, and the next-generation 802.11 standard (post802.11bn).

[0029] In this application embodiment, the terminal device may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station (MS), mobile terminal (MT), remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or user apparatus. The terminal device in this application embodiment can be a device that provides voice and / or data connectivity to a user, and can be used to connect people, objects, and machines, such as a handheld device with wireless connectivity, vehicle-mounted device, etc. Terminal devices can also be mobile phones, tablets, laptops, PDAs, mobile internet devices (MIDs), wearable devices, virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control, self-driving, remote medical surgery, smart grids, transportation safety, smart cities, and smart homes. Optionally, terminal devices can act as base stations. For example, a terminal device can act as a dispatching entity, providing sidelink signals between terminal devices in vehicle-to-everything (V2X) or device-to-device (D2D) systems. For instance, cellular phones and cars communicate with each other using sidelink signals. Cellular phones and smart home devices communicate without relaying communication signals through base stations.

[0030] In this embodiment, the network device can be a device used to communicate with a terminal device. The network device can be an access network device or a wireless access network device. For example, the network device can be a base station. The term "base station" can broadly encompass various names as follows, or can be replaced by names such as: NodeB, evolved NodeB (eNB), next-generation NodeB (gNB), relay station, transmitting and receiving point (TRP), transmitting point (TP), master station (MeNB), secondary station (SeNB), multi-standard wireless (MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, baseband unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, etc. A base station can be a macro base station, micro base station, relay node, donor node, or similar entity, or a combination thereof. A base station can also refer to a communication module, modem, or chip installed within the aforementioned equipment or apparatus. A base station can also be a mobile switching center, or an entity that performs base station functions in device-to-device (D2D), vehicle-to-everything (V2X), and machine-to-machine (M2M) communications, a network-side device in a 6G network, or an entity that performs base station functions in future communication systems. A base station can support networks using the same or different access technologies. The embodiments of this application do not limit the specific technologies or device forms used in the network equipment. In some deployments, the network equipment may include a CU or a DU; or, the network equipment may include both a CU and a DU. Optionally, the base station may include an AAU.

[0031] Furthermore, base stations can be fixed or mobile. For example, a helicopter or drone can be configured to act as a mobile base station, and one or more cells can move depending on the location of the mobile base station. In other examples, a helicopter or drone can be configured as a device to communicate with another base station.

[0032] In other implementations, the terminal device may also include access point stations (AP STAs) and / or non-access point stations (non-AP STAs) in the WLAN, and may support, but is not limited to, 802.11be, 802.11bn or post 802.11bn standards; it may also support various current and future 802.11 family WLAN standards such as 802.11ax, 802.11ac, 802.11n, 802.11g, 802.11b and 802.11a.

[0033] Accordingly, network devices may also include access points (APs) in WLANs, which can support 802.11be, 802.11bnor post 802.11bn standards; and can also support various current and future 802.11 family WLAN standards such as 802.11ax, 802.11ac, 802.11n, 802.11g, 802.11b, and 802.11a.

[0034] Network devices and terminal devices can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; and they can also be deployed in the air on airplanes, balloons, and satellites. This application does not limit the scenario in which the network devices and terminal devices are located.

[0035] It should be understood that all or part of the functions of the communication device in this application can also be implemented by software functions running on hardware, or by virtualization functions instantiated on a platform such as a cloud platform.

[0036] In NR systems, the acquisition and reporting of channel state information (CSI) typically fall into two categories: configuration-based and trigger-based. Configuration-based CSI measurement and reporting are based on RRC configuration, including periodic and semi-persistent CSI measurements and reporting, with periodic reporting via PUCCH for continuous tracking of steady-state links. Triggered CSI measurement and reporting are triggered by uplink grant DCI (e.g., DCI format 0_x), reported once via PUSCH, and associated with the corresponding CSI-RS resource to complete the CSI-RS measurement. Hereinafter, trigger-based non-periodic CSI reporting will also be referred to as A-CSI. Uplink grant, for example, refers to the permission granted by network devices to terminal devices for uplink resources via downlink signaling, used to schedule terminal devices to transmit data or control information on specified time-frequency resources.

[0037] Meanwhile, the sounding reference signal (SRS) used for uplink probing or antenna switching, and the SRS for antenna switching (SRS-AS) also typically rely on uplink grant triggering to allow network devices to estimate uplink channel quality or adjust the antenna orientation of terminal devices. In existing procedures, when a terminal device enters a connected state from an idle or inactive state, or when a secondary cell (SCell) is activated from an inactive state and switches from a dormant bandwidth part (BWP) to a non-dormant BWP, the system typically first issues a complete RRC configuration (e.g., including BWP, CSI, SRS, and report patterns), and then triggers the transmission of A-CSI or SRS through subsequent DCI. This two-stage "configuration + triggering" mechanism may result in a delay in the generation of the first available CSI or uplink probing signal, causing additional waiting time between access or activation and the first batch of schedulable resources.

[0038] Furthermore, in the initial stages of SCell activation or sleep / wake-up, the terminal device has not yet calibrated the uplink timing advance (TA) or selected the beam / port. If the SRS-AS also needs to wait for subsequent DCI triggering, the uplink detection will be further delayed, affecting the timeliness of uplink establishment and power control. For the downlink, the lack of CSI information such as the precoding matrix indicator (PMI) / channel quality indicator (CQI) will delay the network's initial precoding and scheduling decisions, making the interval between successful access and schedulable resources longer. At the same time, the handover between BWP sleep and non-sleep relies on traditional DCI or MAC CE signaling. Under the current mechanism, it is usually necessary to first complete the sleep state handover through DCI or MAC CE, and then wait for another DCI to trigger the transmission of A-CSI, uplink SRS-AS, or downlink CSI-RS, forming a two-stage activation. This process has a significant waiting window in the time domain, which increases both protocol latency and the probability of uplink / downlink half-duplex conflicts.

[0039] As mentioned earlier, in NR systems, CSI reports are categorized into configuration-based periodic or semi-persistent CSI reporting (mostly via PUCCH) and triggered aperiodic CSI reporting (mostly via PUSCH). Triggered aperiodic CSI reporting is typically triggered by UL-authorized DCI 0_x, and is associated with corresponding CSI-RS resources for CSI-RS measurements. SRS-AS is also usually triggered by UL authorization for antenna switching / uplink detection. Access and carrier activation typically occur when the terminal device transitions from an idle or inactive state to a connected state, or when a SCell transitions from inactive to active or wakes up from sleep. Typically, the network sends out configuration information before subsequent DCI triggers A-CSI or SRS, resulting in additional waiting time throughout the process. Therefore, it is necessary to advance the first available CSI reporting and / or uplink probing to an earlier time to shorten the time interval between access connection, SCell activation, SCell exiting sleep or waking up and the availability of schedulable resources, and reduce the overhead of CSI-RS in the case of large port aggregation, while taking into account energy consumption and channel estimation quality, to achieve a joint process of "state switching triggering".

[0040] Therefore, in this embodiment of the application, the first information used to trigger the uplink reference signal, downlink reference signal or CSI is transmitted in advance during the uplink random access process, secondary cell activation or secondary cell exiting dormancy state, so that these signals are transmitted as early as possible, reducing the transmission delay of these signals and shortening the time delay between the state switch of the terminal device and the channel detection, which is beneficial to network decision-making.

[0041] The following is combined Figure 2 The embodiments of this application will be described in detail below.

[0042] Figure 2 This is a flowchart illustrating the communication method provided in an embodiment of this application. Figure 2 The method 200 shown can be performed by a terminal device and a network device. The terminal device may be, for example, a terminal device... Figure 1 The terminal device 120 shown may be, for example, a network device. Figure 1 The network device 110 shown is shown. Figure 2 The method 200 shown may include some or all of the following steps.

[0043] In step 210, the network device sends the first information to the terminal device.

[0044] In step 220, the terminal device receives the first information sent by the network device.

[0045] The first information is used to trigger the reception or transmission of the target signal, which includes one or more of the following: uplink reference signal; downlink reference signal; channel state information (CSI).

[0046] For example, the first information is used to trigger the terminal device to send an uplink reference signal on the corresponding resource; or, for example, the first information is used to trigger the terminal device to receive a downlink reference signal on the corresponding resource, or in other words, the first information is used to instruct the network device to send a downlink reference signal on that resource; or, for example, the first information is used to trigger the terminal device to report a CSI to the network device on the corresponding resource. Here, CSI can also be called a CSI report, for example, a CSI report is based on the terminal device's measurement results of the downlink reference signal.

[0047] The aforementioned uplink reference signal includes, for example, an SRS, such as an antenna switching (AS-SRS) probe reference signal. This uplink reference signal can be an aperiodic reference signal, i.e., AP-SRS or A-SRS, or it can be a semi-persistent reference signal, i.e., SP-SRS.

[0048] The aforementioned downlink reference signal includes, for example, CSI-RS or SSB. This downlink reference signal can be a non-periodic reference signal, such as AP-CSI-RS or A-CSI-RS, or it can be a semi-persistent reference signal, such as SP-CSI-RS. After measuring the downlink reference signal, the terminal device generates a CSI report from the measurement results and sends it to the network device. The transmission of the CSI report can be periodic or semi-persistent, such as AP-CSI, A-CSI, or SP-CSI.

[0049] In this embodiment, the timing of sending the first information is advanced, for example, before the end of the state switching process of the terminal device. In some implementations, the first information is sent by the network device during uplink random access; or, in other implementations, the first information is sent by the network device during cell activation or exit from dormancy. Cell activation or exit from dormancy includes, for example, the activation or exit from dormancy of a secondary cell or other cells. These two scenarios will be described in detail below. The scheme for early triggering of the target signal proposed in this embodiment will also be referred to as early triggering of the target signal or advance triggering.

[0050] First information during uplink random access process

[0051] Here, the uplink random access procedure includes, for example, a 4-step random access procedure or a 2-step random access procedure. The 4-step random access procedure includes a first message (denoted as MSG 1), a second message (denoted as MSG 2), a third message (denoted as MSG 3), and a fourth message (denoted as MSG 4). Typically, MSG 4 in the 4-step random access procedure can be considered the last message of the procedure. However, since the terminal device can provide feedback for MSG 4, the feedback information corresponding to MSG 4 (e.g., HARQ-ACK) can be referred to as MSG 5. Hereinafter, the last message in the random access procedure refers to MSG 4. The 2-step random access procedure includes MSG A and MSG B, where MSG B is the last message in the 2-step random access procedure. The following description uses a 4-step random access procedure as an example to illustrate this embodiment. The improvements and enhancements to MSG 4 in the 4-step random access procedure also apply to MSG B in the 2-step random access procedure; similarly, the improvements and enhancements to MSG 3 in the 4-step random access procedure also apply to MSG A in the 2-step random access procedure. Furthermore, all other technical features discussed below apply to both the 4-step and 2-step random access procedures.

[0052] As an example, in the four-step random access process, MSG 1 includes a preamble, through which the terminal device notifies the network device of its need to access the network; MSG 2 is the random access response (RAR), which may include, for example, a TA, an initial uplink grant (i.e., allocating resources for MSG 3), a temporary identifier, etc.; MSG 3 may include, for example, an RRC connection request (e.g., an RRC establishment request or an RRC reconstruction request); through MSG 4, the network device confirms the identity of the terminal device and completes contention resolution.

[0053] In some implementations, the first information is carried in the last message (e.g., MAG 4) of the uplink random access process. For example, in scenarios where the terminal device transitions from idle / inactive to connected state, aperiodic SRS-AS transmission triggered by MSG 4 in the 4-step random access process is supported; as another example, in scenarios where the terminal device transitions from idle / inactive to connected state, aperiodic CSI reporting triggered by MSG 4 in the 4-step random access process is supported when the following condition is met: the aperiodic CSI reporting is transmitted on the PUSCH.

[0054] In this embodiment, at least aperiodic CSI-RS associated with aperiodic CSI reporting is supported for obtaining CSI. The reported CSI content supports, for example, reporting of precoding matrix indication (PMI) and channel quality indicator (CQI), also known as PMI-based CQI; or it supports CQI reporting without PMI, also known as PMI-free CQI. The codebook type corresponding to the CSI includes Type-I or Type-II.

[0055] Taking a Type-I-based single-level codebook as an example, for CSI triggered during random access, CRI may not be reported (or a 0-bit CRI may be reported). For a Type-I-SP codebook, the reported CSI content may include {PMI, RI, CQI}, for example, by setting ReportQuantity to "cri-RI-PMI-CQI"; for non-PMI CSI, the reported CSI information may include {RI, CQI}, for example, by setting ReportQuantity to "cri-RI-CQI".

[0056] The last message in the uplink random access process, MSG 4, may be transmitted via PDSCH or PDCCH. Therefore, in some implementations, MSG 4 includes PDSCH and the first information is carried in the MAC CE within the PDSCH; or, MSG 4 includes PDCCH and the first information is carried in the PDCCH, such as in the DCI within the PDCCH.

[0057] When triggering a target signal via a new MAC CE included in the PDSCH of MSG 4, a straightforward approach is to add a new field to the PDSCH corresponding to MSG 4. This new field carries initial information for triggering the target signal; that is, it indicates the triggering state. For example, a value of 1 indicates early triggering of the target signal, while a value of 0 indicates no early triggering. This triggering state can be associated with configuration information for transmitting the target signal, such as SCI-RS resource configuration, SRS resource configuration, and / or CSI report configuration. This initial information can be carried at the end of the PDSCH, for example, occupying the last time-domain symbol of the PDSCH, or carried in other symbol bits of the PDSCH.

[0058] When a target signal is triggered via the PDCCH of MSG 4, the reserved bits in the DCI (e.g., DCI format 1_0) carried in the PDCCH are used to carry the first information, or the DCI includes additional bits used to carry the first information. Specifically, if the parameter numberOfMSG 4HARQACK-Repetitions associated with the PDCCH repetition of MSG 4 is not configured, 2 bits of the downlink allocation index field in the DCI carried by the PDCCH will be reserved. In this case, these 2 bits are used to carry the first information for triggering the target signal. Conversely, if the parameter numberOfMSG 4HARQACK-Repetitions is configured, there will be no reserved bits for MSG 4 in the DCI. Therefore, in either case, at most 2 bits may be used to carry the first information.

[0059] When it is necessary to configure both early triggering of the target signal and repeated transmission of the PUCCH of MSG 4 (e.g., the parameter numberOfMSG 4HARQACK-Repetitions mentioned above), there are no available reserved bits for carrying the first information. In this case, alternatively, the number of bits in the DCI format 1_0 carried in the PDSCH of MSG 4 can be expanded, that is, a new field can be added to the DCI format 1_0 to carry the first information, resulting in a new DCI format 1_0. It should be noted that the network device can only send the DCI using the new DCI format 1_0 to terminal devices that support early triggering of the target signal. For example, whether the additional fields related to early triggering of the target signal exist depends on whether the terminal device has reported the relevant capability in advance, that is, whether it supports the capability of early triggering of the target signal. Alternatively, as mentioned above, the first information can be sent, for example, through the MAC CE of the PDSCH of MSG 4. Since there is no limit to the number of bits in the PDSCH, the first information can be carried in the MAC CE corresponding to MSG 4.

[0060] The aforementioned target signal triggered by the first information may include some or all of the uplink reference signal, downlink reference signal, and CSI. For example, the uplink reference signal, downlink reference signal, and CSI are all triggered by the first information; or the uplink reference signal and downlink reference signal are triggered by the first information, and the CSI is triggered by other messages (e.g., DCI); or the uplink reference signal is triggered by the first information, and the downlink reference signal and CSI are triggered by other messages (e.g., DCI).

[0061] For downlink channel probing, for example, the first message can simultaneously trigger "aperiodic CSI-RS measurement + CSI reporting"; or, the first message can trigger "aperiodic CSI-RS measurement" and then the CSI reporting can be scheduled through other messages. For example, the CSI reporting can be scheduled through the PUSCH corresponding to the feedback information of MSG 4 (i.e., MSG 5).

[0062] In some implementations, the first information may include one or more of the following: reference time; time offset (or trigger offset) of the transmission time of the target signal relative to the reference time; configuration information for receiving or transmitting the target signal; trigger status information for indicating whether the target signal is triggered; uplink grant information corresponding to the PUSCH carrying CSI; coding rate scaling parameters corresponding to the PUSCH carrying CSI; and the transmission order of the uplink reference signal, downlink reference signal, and CSI.

[0063] When a terminal device transitions from an idle / inactive state to a connected state, early aperiodic signals (e.g., SRS-AS, CSI-RS, CSI) can be triggered, for example, using the MAC-CE in the PDSCH of MSG 4. For early-triggered signals (e.g., SRS-AS, CSI-RS, CSI) via the random access channel (RACH), the timeline of each signal transmission can be defined, for example, based on a reference time (e.g., a reference time slot) and a time offset (e.g., a time slot offset). For instance, the reference time is the time slot for transmitting the HARQ-ACK information corresponding to MSG 4, and the time offset is pre-configured or indicated by the trigger signaling.

[0064] In the allocation of PUSCH for aperiodic CSI reports triggered by MSG 4, when the terminal device transitions from idle or inactive to connected state, the PUSCH can be scheduled along with the aperiodic CSI report via MAC CE in MSG 4. Alternatively, the PUSCH can be scheduled by traditional DCI after MSG 4, or the PUSCH can be configured by SIB, providing resource configuration and / or report configuration for earlier triggered aperiodic CSI reports.

[0065] Alternatively, when a terminal device transitions from an idle or inactive state to a connected state, it can receive a TRS in advance. This could include an aperiodic TRS triggered by MSG 4, or it could include both periodic and aperiodic TRS triggered by MSG 4, or it could only support periodic TRS triggered by MSG 4. For example, there could be two available CSI-RS resources: one is the CSI-RS resource set configuration for terminal devices in the connected state; the other is the TRS resource set configuration for terminal devices in the idle or inactive state. Regarding early TRS triggering, this use case includes, for example, two aspects: one is based on the CSI-RS resource set of the terminal device in the connected state and extends it to be feasible for terminal devices in the idle or inactive state; the other is based on the TRS resource set and extends early triggering through MSG 4.

[0066] Optionally, the reference time in the first information includes the time corresponding to the first information (e.g., the last time domain symbol of the PDCCH or PDSCH carrying the first information), the time corresponding to the feedback information of the first information (e.g., the last time domain symbol of the PUCCH or PUSCH carrying the feedback information), and the time of the first available uplink transmission (or the first UL authorization) after the first information.

[0067] As an example, the last symbol of the PDCCH or PDSCH corresponding to MSG 4 is used as the reference time, and the start time of the target signal is spaced apart from the reference time by a predetermined duration; as another example, the last symbol of the PUCCH or PUSCH of the feedback information corresponding to MSG 4 is used as the reference, and the start time of the target signal is spaced apart from the reference time by a predetermined duration; as yet another example, the position of the first uplink grant time domain resource after the first information is used as the reference time.

[0068] The time of receiving or transmitting the target signal can have a predetermined time offset relative to a reference time. This time offset can be, for example, a predetermined value, such as 3 milliseconds. Alternatively, the time offset can be determined based on one or more of the following: the time when the terminal device successfully receives the first information, the minimum processing time for uplink / downlink scheduling and configuration by the terminal device (e.g., 1-2 time slots), subcarrier spacing (SCS), etc. It should be noted that when the time offset is 0, it indicates that the reference time is used as the transmission time of the target signal. Information such as the reference time and time offset can be pre-agreed, pre-configured, or carried through the first information.

[0069] The aforementioned uplink grant information for the PUSCH used to carry CSI may include some or all of the parameters such as PUSCH frequency resource allocation, PUSCH time resource allocation, MCS, and power control.

[0070] The aforementioned coding rate scaling parameters for the PUSCH used to carry CSI include, for example, the Beta_offset parameter. For early triggering of CSI reports via the PUSCH, rate matching requires the use of the coding rate scaling parameter Beta_offset. For early triggering of CSI in random access procedures, network devices can pre-configure one or more Beta_offset values ​​for PUSCH-based CSI reporting. If multiple values ​​are configured, the uplink grant on the PUSCH will indicate one of the configured Beta_offset values.

[0071] The transmission order of the aforementioned target signals, namely the transmission order of the uplink reference signal, downlink reference signal, and CSI, can be indicated by the first information or configured by the network device. For example, the network device can pre-configure multiple transmission orders of the target signals and indicate one of the transmission orders through the first information.

[0072] In some implementations, the transmission order of the target signal includes: uplink reference signal, downlink reference signal, and CSI transmitted sequentially, i.e., uplink priority; or, in some implementations, downlink reference signal, CSI, and uplink reference signal transmitted sequentially, i.e., downlink priority; or, in some implementations, the uplink reference signal is transmitted at at least one first time position within the detection window after the first information, the downlink reference signal is transmitted at at least one second time position within the detection window, and the CSI is transmitted at the first resource position available for uplink transmission after the downlink reference signal is completed. These implementations are described below.

[0073] Hereinafter, the end time of successful reception of the first information by the terminal device is denoted as t4, the minimum processing time for downlink scheduling and configuration of the terminal device is denoted as T_proc^DL, and the minimum processing time for uplink scheduling and configuration of the terminal device is denoted as T_proc^UL. T_proc^DL ​​and T_proc^UL can be configured with 1-2 time slots, for example. The subcarrier interval is denoted as μ, where the time slot length is, for example, equal to 1ms × 2^(-μ). A-CSI, for example, indicates an aperiodic CSI report triggered by "CSI request field of DCI 0_x + PUSCH UL grant"; SRS-AS, for example, indicates an aperiodic SRS triggered by "UL grant", used for uplink detection, antenna selection, or auxiliary synchronization; CSI-RS_N, for example, indicates a set / one aperiodic CSI-RS resource for the measurement of this A-CSI (e.g., the resource set indicated by MSG 4 or a reference to a pre-configured resource set).

[0074] For example, in the uplink-first (UL-first) scenario, SRS-AS is transmitted first, followed by CSI-RS and A-CSI. In this case, it's necessary to verify / switch the uplink beam / antenna first to ensure the network receives usable uplink information as quickly as possible. The signal transmission order is as follows:

[0075] SRS-AS: Send one or more SRSs in the earliest available UL time slot after t4, t(SRS-AS)≥t4+T_proc^UL;

[0076] CSI-RS: Following SRS-AS, the network device sends out a set of non-periodic CSI-RS (e.g., completed within 1-2 time slots), t(CSI-RS)≥t4+T_proc^DL;

[0077] A-CSI (carried on PUSCH): falls within the first UL-authorized resource after the completion of CSI-RS reception and the completion of terminal device measurement and PMI calculation, t(A-CSI)≥t(CSI-RS_last)+T_meas+T_proc^UL, where T_meas represents the time from when the terminal device finishes receiving the CSI-RS for measurement to when it is ready to use the measurement results (e.g., PMI and / or CQI) for reporting or scheduling the required measurement and algorithm processing.

[0078] For example, downlink-first (DL-first) scenarios are typically suitable for large-port aggregation and PMI optimization where initial DL coverage or throughput is more critical. The signal transmission order is as follows:

[0079] CSI-RS: t(CSI-RS)≥t4+T_proc^DL;

[0080] A-CSI (carried on PUSCH): t(A-CSI)≥t(CSI-RS_last)+T_meas+T_proc^UL;

[0081] SRS-AS: Transmitted in the nearest UL time slot after A-CSI, t(SRS-AS)≥t4+T_proc^UL, or there is a UL cycle interval between SRS-AS and A-CSI to avoid collisions.

[0082] This allows for earlier acquisition of downlink PMI and / or CQI, enabling network devices to quickly issue PDSCH.

[0083] For example, using a "first-come, first-served" approach, a detection window can be set after MSG 4, for example, including 2-4 DL / UL cycles, such as 2-4 time slots. One CSI-RS should be scheduled as early as possible within this window. Alternatively, two or more CSI-RS can be scheduled if necessary, for example, the number of CSI-RS transmissions can be determined based on port aggregation scale and overhead. One or two SRS-AS (e.g., SRS-AS with short pulses and / or short duty cycles) should be scheduled within the same detection window to avoid CSI-RS overlap and half-duplex / co-frequency constraints of the terminal equipment. A-CSI (carried on PUSCH) is aligned with the first available UL authorization after the most recently completed CSI-RS. If an SRS-AS is completed before the CSI-RS is broadcast within the detection window, A-CSI can be delayed until the CSI-RS arrives.

[0084] In other implementations, CSI-RS can also be sent on the SRS resources within the probe window. For example, if the SRS is not ready but the CSI-RS measurement results have been obtained, CSI reporting can be performed on unused SRS resources within the probe window.

[0085] The "first-come, first-served" approach offers better robustness and is more adaptable to varying cell loads and half-duplex / collision avoidance. Alternatively, the time gap between MSG 4 and its corresponding feedback information can be utilized for early CSI processing and early SRS transmission. For early-triggered CSI and SRS in the random access procedure, CSI-RS and / or SRS triggered by MSG 4 can be transmitted no later than the PUSCH or PUCCH corresponding to MSG 5, and CSI reports can be submitted no later than the PUSCH or PUCCH corresponding to MSG 5, or after the PUSCH or PUCCH corresponding to MSG 5. Alternatively, to ensure link adaptation is completed as quickly as possible after MSG 4, the SRS-AS and CSI reports associated with CSI-RS should be triggered simultaneously by MSG 4, rather than separately by MSG 4 and other signaling. For example, a new MACCE can be introduced in the PDSCH carrying MSG 4 to trigger SRS-AS and CSI reports simultaneously.

[0086] In some implementations, the network device sends second information to the terminal device; correspondingly, the terminal device receives the second information sent by the network device. The second information includes one or more configuration information for receiving or sending a target signal. That is, the second information configures corresponding resource information and / or reporting information for the early triggering of the target signal. For example, the second information is carried in a system information block (SIB), such as SIB1 or SIBx; or, for example, in MSG 4 during uplink random access; or, for example, in other downlink messages during uplink random access, such as MSG 2; or, for example, in RRC signaling, which can be RRC signaling before or after the terminal device accesses the network, such as an RRC reconfiguration message.

[0087] The second information is associated with one or more of the following capabilities: the ability to trigger a target signal based on the first information, radio frequency hardware capabilities, the maximum transmission bandwidth of the supported uplink reference signal, the maximum number of ports of the supported downlink reference signal, and the maximum transmission bandwidth of the supported downlink reference signal.

[0088] The ability to trigger a target signal based on the first information refers to whether the terminal device supports early triggering of the target signal. Radio frequency hardware capabilities include, for example, the xTyR capability supported by the terminal device (where T represents the transmitting antenna, x represents the number of transmitting antennas, R represents the receiving antenna, and y represents the number of receiving antennas).

[0089] To support various types of devices, the network can provide one or more sets of configuration information based on various capability assumptions. This configuration information may include, for example, resource configuration and / or reporting configuration. Resource configuration may include resources associated with uplink or downlink reference signals, and reporting configuration may include information related to CSI reporting, such as the content of the CSI report and the resources used to report the CSI.

[0090] Taking RF hardware capabilities as an example, different terminal devices may support different xTyR capabilities to achieve early triggering of the target signal. Some terminal devices may support 1T2R, while others may support 2T4R. Other capabilities may include, for example, the maximum bandwidth of SRS transmission during early SRS triggering, and the maximum number and maximum bandwidth of CSI-RS ports during early CSI-RS triggering. When a terminal device switches from idle or inactive to connected mode, for early triggering of SRS, CSI-RS, and CSI, the network device can provide configuration information based on various terminal device capability assumptions, such as in SIBx. For example, the network device carries N sets of configuration information in SIB1, and the terminal device can subsequently indicate to the network device the configuration information it supports and / or does not support from the N sets of configuration information, and / or indicate its own capability information. Of course, the network device may also provide only a fixed set of configuration information for early triggering of the target signal.

[0091] For example, when a terminal device transitions from an idle or inactive state to a connected state, in order to trigger aperiodic CSI reports and associated CSI-RS in advance, the network device can provide one or more CSI report configurations based on the capabilities of one or more terminal devices, such as SIBx. Each CSI report configuration is associated with a CSI resource configuration used for channel measurements. The CSI-RS resource set in the CSI resource configuration used for channel measurements has the same number of CSI-RS ports, and each CSI report configuration is associated with a CSI resource configuration used for CSI-IM-based interference measurements.

[0092] For example, to trigger SRS-AS transmission as early as possible when a terminal device transitions from an idle / inactive state to a connected state, the network device can provide the terminal device with one or more SRS configurations based on one or more "xTyR" capability assumptions via SIBx. The network device can provide at least one set of SRS configuration resources for transmitting SRS-AS from these SRS configurations for the same "xTyR" capability; the SRS configuration can, for example, be associated with a CSI reporting configuration without PMI reporting.

[0093] Some of the aforementioned parameters may be configured in the second information or in the first information. For example, parameters such as the offset time used to determine the transmission time of the target signal can be configured either through the second information (i.e., carried as parameters in the resource configuration and / or reporting configuration) or through the first information. If the same parameter appears in both the second and first information, optionally, the value of the parameter in the first information can override the value in the second information; that is, the value of the parameter in the first information will prevail.

[0094] This approach takes into account the fact that the capacity of messages used to carry secondary information, such as SIBs, is typically limited; the maximum number of bits in an SIB message is usually 2976 bits. To avoid carrying too much unnecessary configuration information in the SIB, some configuration parameters can be indicated in MSG 4 to override and / or supplement the parameter values ​​provided in the SIB. For example, a time offset for determining the transmission time of the target signal is configured in the CSI-RS resource set. To ensure the flexibility of CSI-RS triggering and avoid configuring too many unnecessary CSI-RS resource sets in the SIB, MSG 4 can indicate a new time offset to override the time offset provided in the SIB. Alternatively, the resources for the PUSCH of CSI triggered by MSG 4 can be simultaneously scheduled based on MSG 4; or after the transmission of uplink reference signals and / or downlink reference signals is triggered by MSG 4, the PUSCH carrying the CSI can be scheduled by another DCI; or the PUSCH resources and CSI reporting configuration can be provided in advance by the SIB.

[0095] In some implementations, the terminal device sends third information to the network device; correspondingly, the network device receives the third information sent by the terminal device. The third information is used to indicate whether the terminal device supports the configuration information indicated by the second information; or, the third information is used to indicate the configuration information supported by the terminal device among the multiple configuration information indicated by the second information; or, the third information is used to indicate the capabilities supported by the terminal device.

[0096] For example, network devices may provide resource configuration and / or reporting configuration in the second information based on only one capability assumption, and terminal devices may report whether they support the resource configuration and / or reporting configuration in the second information via MSG 3.

[0097] For example, network devices may assume that resource configuration and / or reporting configurations are provided in the second information based on one or more capabilities. Terminal devices can report which resource configurations and / or reporting settings in the second information they support, or which resource configurations and / or reporting settings in the second information they do not support, through MSG 3.

[0098] For example, network devices may provide resource configuration and / or reporting configuration in the second information based on one or more capability assumptions. Terminal devices may report their supported capabilities for receiving or transmitting uplink reference signals, downlink reference signals, or CSI via MSG 3. This includes reporting whether they support early triggering of uplink reference signals, downlink reference signals, or CSI, the maximum number of CSI-RS ports, the xTyR of the SRS-AS, the maximum bandwidth of the CSI-RS, and the maximum bandwidth of the SRS-AS. As an example, if a network device configures two CSI-RS resources, corresponding to 8 ports and 16 ports respectively, and the terminal device supports 32 ports of CSI-RS for early triggering of CSI, then the terminal device can indicate to the network device that it supports a maximum of 16 ports, or it can indicate to the network device that it supports a maximum of 32 ports.

[0099] The configuration information in the second information is related to the UE's capabilities; therefore, it can also be said that the second information indicates one or more capabilities for receiving or transmitting target signals. The second information may include a subset of predefined (e.g., defined in standards or protocols) capability assumptions for early triggering of target signals. For target signals that are triggered early during random access, the capability indication is provided via MSG 3, meaning the terminal device selects from one or more capability assumptions in the second information and reports the configuration information corresponding to zero, one, or more capabilities it supports. Optionally, the configuration information in the second information simultaneously includes CSI-RS resources for channel measurement report (CMR) and CSI-IM resources for interference measurement (i.e., ZP IMR).

[0100] Terminal devices can perform early triggering operations for target signals based on their ability to report via MSG 3. For example, they can detect the first information in MSG 4 and determine the time to send SRS, receive CSI-RS, or report CSI based on information such as reference time and time offset.

[0101] For early triggering of target signals during random access procedures, regarding system information (SI) configuration and MSG 3 content selection, since there may be multiple different "xTyR" combinations for target signal transmission, and different terminal devices may have varying levels of support for one or more "xTyR" combinations, network devices can configure and / or report configurations associated with multiple "xTyRs" through the second information for target signals triggered during random access procedures. For example, taking SRS as an example, network devices configure SRS resource sets associated with different "xTyRs" through the second information, while terminal devices indicate through MSG 3 that they support zero, one, or more "xTyR" capabilities for receiving or transmitting target signals.

[0102] Furthermore, the AP-TRS and P-TRS of the random access procedure are used to assist downlink synchronization and assist early CSI measurements, respectively. For assisting downlink synchronization, it can start as early as MSG 2, while the AP-TRS triggered by MSG 4 can only be started after MSG 4. Therefore, the triggering time of AP-TRS needs to be advanced to an earlier time. That is to say, when adopting the technical solution of this embodiment, the AP-TRS originally triggered by MSG 4 also needs to be triggered earlier, for example, by advancing its triggering time to MSG 2 or to any time domain resource before the first information in MSG 4.

[0103] For example, for early CSI using the Type-I-SP codebook during random access, only one CSI-RS resource with a maximum of 8 ports (i.e., the UE capability of the mandatory Broadband Type-I CSI for Rel-15) and the corresponding antenna dimension parameters {N1, N2} can be supported. The terminal device indicates whether it supports this configuration via MSG 3. Alternatively, the second information can include multiple CSI-RS resources with different numbers of ports, each with corresponding antenna dimension parameters {N1, N2}. The terminal device indicates whether it supports zero or one of the configurations in the second information via MSG 3. In the RRC-based CSI framework, a trigger status information can be associated with multiple CSI reports; that is, some CSI reports support early triggering, while others may not. For CSI triggered during random access, MSG 4 can trigger only one CSI report.

[0104] Optionally, for CSI triggered during random access, CRI may not be reported (or, a 0-bit CRI may be reported). For Type-I-SP codebooks, the reported CSI content may include, for example, {PMI, RI, CQI}, such as setting ReportQuantity to "cri-RI-PMI-CQI"; for non-PMI CSI, the reported CSI information may include, for example, {RI, CQI}, such as setting ReportQuantity to "cri-RI-CQI".

[0105] The third information can be carried, for example, in the third message (i.e., MSG 3) during the uplink random access procedure. Optionally, reserved bits in the third message are used to carry the third information; or, the third information is associated with the logical channel identifier (LCID) in MSG 3, that is, the LCID implicitly indicates whether the terminal device supports the configuration information sent by the network device, which configuration information it supports, or which capabilities it supports.

[0106] Specifically, only one spare bit in MSG 3 (e.g., RRC setup request message) is available to indicate the capabilities supported by the terminal device. In cases where one bit is insufficient to indicate enough capability information, an implicit indication can be made through the LCID in MSG 3, i.e., the third information includes the LCID. The LCID values ​​for UL-SCH are defined in table TS 38.321

[11] of the relevant standard, for example, the LCID values ​​for DL-SCH as shown in Table 1. According to this table, the terminal device can indicate its supported capabilities through the LCID index (e.g., one of the index values ​​between 35 and 46). From an implementation perspective, it is preferable to use independent capability indication signaling between uplink reference signal-related capability information (e.g., capabilities related to SRS transmission) and downlink reference signal-related capability information (e.g., capabilities related to CSI-RS reception and CSI reporting). That is, certain LCID values ​​(e.g., some index values ​​from 35 to 46) indicate the uplink reference signal-related capabilities supported by the terminal device, while other LCID values ​​(e.g., other index values ​​from 35 to 46) indicate the downlink reference signal-related capabilities supported by the terminal device. This provides greater flexibility. In this sense, the terminal device's capability indication signaling requires at least 2 bits, used to indicate both uplink and downlink reference signal-related capabilities. Therefore, the LCID or eLCID in the MAC CE of MSG 3 can be used as capability indication signaling, i.e., third information, to achieve early triggering of the target signal.

[0107] Table 1

[0108]

[0109]

[0110] The first information during the process of activating or exiting dormancy in a cell

[0111] Here, the term "cell" includes, for example, a secondary cell. The activation or deactivation of a secondary cell (SCell) is typically applied in carrier aggregation and / or dual-link scenarios. For instance, network devices can instruct terminal devices to activate or deactivate a secondary cell via MAC CE or RRC messages. The sleep and non-sleep states of a secondary cell are designed for energy saving. Terminal devices consume less power in the sleep state, possibly retaining only some functions such as SSB detection, and quickly exit the sleep state (or wake up) when there is a burst of traffic. While in sleep mode, the terminal device switches its BWP to a low-power BWP, hereinafter also referred to as a sleep BWP. Correspondingly, after exiting sleep mode, the terminal device switches to a non-sleep BWP.

[0112] In this embodiment of the application, the message used to indicate that the secondary cell is exiting the sleep state can be, for example, a DCI. The format of the DCI includes one or more of the following formats: DCI format 0_0, DCI 0_1, DCI format 0_3, DCI format 1_0, DCI 1_1, DCI format 1_3, and DCI format 2_6. DCI format 2_6 can, for example, carry a wakeup signal (WUS).

[0113] In some implementations, the first information is carried in a message indicating secondary cell activation, or in a message indicating secondary cell exiting dormancy. For example, the message carrying the first information may include DCI or MACCE, etc.

[0114] For MAC CE, it can be implemented implicitly or explicitly. Regarding implicit and explicit MAC-CE triggering, the implicit approach is understood to mean that the triggering behavior is configured by RRC and cannot be dynamically indicated or modified. Considering that multiple functions are possible, such as a standalone SRS, a standalone CSI, or a non-PMI with "SRS+CSI-RS", the implicit approach can only configure one function. If another function needs to be supported, it can only be reconfigured by RRC. Therefore, for early secondary cell CSI or secondary cell SRS triggered by secondary cell activation MAC CE, explicit trigger indication in the secondary cell activation MAC-CE is supported. As for the trigger offset, for early secondary cell CSI or secondary cell SRS triggered by secondary cell activation MAC CE, for triggered AP-CSI-RS or AP-SRS, the signal transmission time can be determined based on the trigger offset defined by the reference time (e.g., reference time slot) in the primary cell. For example, the trigger offset is: time slot Wherein, time slot n+m is the time slot for HARQ-ACK. The MAC-CE processing time is 3 seconds. Here, 3 seconds is just an example and can be replaced with other values.

[0115] To enable early triggering of target signals during the transition from a dormant BWP to a non-dormant BWP in a secondary cell, SRS transmission is typically not supported during dormant BWP operation. Therefore, periodic, semi-persistent, or aperiodic SRS can be configured when the terminal device switches out of dormant state. In this embodiment, the purpose of designing early triggering of target signals is to obtain channel information in advance during the transition from inactive or dormant state, rather than obtaining channel information only after transitioning to an inactive or non-dormant state.

[0116] To enable early triggering of SRS-AS during the transition from a dormant BWP to a non-dormant BWP in a secondary cell, aperiodic SRS-AS transmission on the non-dormant BWP is supported, triggered via DCI, indicating the handover of the secondary cell's dormant state. To enable early triggering of CSI or CSI-RS during the transition from a dormant BWP to a non-dormant BWP in a secondary cell, aperiodic CSI reporting on the non-dormant BWP, triggered via DCI, is supported, indicating the handover of the secondary cell's dormant state. Aperiodic CSI reports can be correlated with aperiodic CSI-RS of CSI on the non-dormant BWP.

[0117] To trigger the target signal during the transition of a secondary cell from an inactive to an active state, and to support at least aperiodic uplink reference signal transmission on the secondary cell, first information can be carried in a message used to activate the secondary cell or to indicate that the secondary cell is exiting a dormant state. This first information triggers the uplink reference signal. Similarly, aperiodic CSI reporting for non-dormant BWPs can be supported. First information can be carried in a message used to activate the secondary cell or to indicate that the secondary cell is exiting a dormant state. This first information triggers the reception of downlink reference signals and CSI reporting by the terminal device, allowing for earlier acquisition of channel information from the non-dormant BWP.

[0118] Optionally, new bits can be added to the MAC CE or RRC message used to activate or deactivate the secondary cell to carry the first information. For example, the new bits can be located in the per-SCell substructure of the MAC CE used for secondary cell activation (e.g., SCellActivation CE); or, for example, network devices typically indicate the addition or modification of a secondary cell through the SCellToAddMod field in an RRC message (e.g., an RRC reconfiguration message), and the first information can be carried in the SCellToAddMod field of the RRC reconfiguration message to indicate whether the secondary cell corresponding to the SCellToAddMod field needs to trigger the target signal in advance during the activation process.

[0119] In some implementations, taking the uplink reference signal as an example, the first information may include one or more of the following: indication information for indicating immediate triggering of the uplink reference signal; the identifier of the target resource template used to transmit the currently triggered uplink reference signal among a plurality of pre-configured uplink reference signal resource templates; the time offset of the transmission time of the uplink reference signal relative to the first information; the time offset of the transmission time of the uplink reference signal relative to the feedback information corresponding to the first information; and the priority information of the uplink reference signal and CSI.

[0120] The first information needs to include indication information to indicate whether early triggering of the uplink reference signal is triggered. For example, a value of 1 indicates early triggering of the uplink reference signal, and a value of 0 indicates no early triggering of the uplink reference signal. Furthermore, the first information may also include an identifier of the target resource template used to transmit the uplink reference signal. The network device can pre-configure multiple resource templates (e.g., through SIB, RRC, etc. messages) and use the first information to indicate the target resource template among the multiple resource templates used to transmit the currently triggered uplink reference signal. The first information may also include reference time and time offset information to help the terminal device determine the transmission time of the uplink reference signal. Of course, reference time and time offset information can also be included in the resource template, or can be pre-agreed upon. The reference time, for example, is the time corresponding to the first information, or the time corresponding to the feedback information of the first time. The time offset can be a preset value (e.g., 3ms), or it can be determined based on information such as the uplink processing time (e.g., 1-2 time slots), downlink processing time (e.g., 1-2 time slots), the calculation time from receiving the downlink reference signal to calculating the CSI content (e.g., PMI and / or CQI), the duration of the half-duplex / handover guard interval, and the transmission time of the CSI-RS. The priority information between the uplink reference signal and the CSI is used to determine how to transmit when there is a resource conflict between the uplink reference signal and the CSI. For example, the CSI priority can be assumed to be higher than the uplink reference signal priority by default.

[0121] In some other implementations, taking the reception of downlink reference signals and the reporting of CSI as examples, the first information may include one or more of the following: indication information for immediately triggering a downlink reference signal; a target resource set identifier for indicating a pre-configured set of multiple downlink reference signal resources used to transmit the currently triggered downlink reference signal; the time offset of the downlink reference signal relative to the first information; the time offset of the downlink reference signal relative to the feedback information corresponding to the first information; indication information for immediately reporting CSI; the time offset between the reporting time of CSI and the downlink reference signal; an identifier for the CSI report template; and uplink authorization information corresponding to the PUSCH carrying the CSI, such as some or all of the parameters including PUSCH frequency resource allocation, PUSCH time resource allocation, MCS, power control, etc.

[0122] The first information needs to include indication information to indicate whether early triggering of the downlink reference signal is triggered. For example, a value of 1 indicates early triggering of the downlink reference signal, and a value of 0 indicates no early triggering of the downlink reference signal. Furthermore, the first information may also include an identifier of the target resource set used for transmitting the downlink reference signal and / or reporting CSI. The network device can pre-configure multiple resource sets (e.g., through SIBs (e.g., the common-preconfig field in SIB1), RRC messages, etc.) and use the first information to indicate the target resource set in the multiple resource sets used for transmitting the currently triggered downlink reference signal and / or CSI. The first information may also include reference time and time offset information to help the terminal device determine the reception time of the downlink reference signal and / or the CSI reporting time. Of course, reference time and time offset information can also be included within the resource set, or can be pre-agreed upon. The reference time, for example, is the time corresponding to the first information, or the time of the feedback information corresponding to the first time. The time offset can be a preset value (e.g., 3ms), or it can be determined based on information such as the uplink processing time (e.g., 1-2 time slots), downlink processing time (e.g., 1-2 time slots), the calculation time from receiving the downlink reference signal to calculating the CSI content (e.g., PMI and / or CQI), the duration of the half-duplex / handover protection interval, and the transmission time of the CSI-RS. The content reported by CSI may include, for example, PMI and CQI, or include CQI but not PMI.

[0123] As previously mentioned, the interval between the transmission time of the target signal and the first information (e.g., the last time-domain symbol of the PDCCH or PDSCH carrying the first information) is a predetermined duration; or the interval between the transmission time of the target signal and the feedback information corresponding to the first information (e.g., the last symbol of the PUSCH or PUCCH carrying the feedback information) is a predetermined duration. Furthermore, in other implementations, the reference time may also be the time corresponding to other signals, for example, the interval between the target signal and the TRS transmitted by the network device is a predetermined duration, or the target signal is equal to the end time of the TRS.

[0124] For example, the first piece of information may include some or all of the following parameters:

[0125] earlySRS-AS-trigger (1 bit): A value of 1 in this field indicates that an aperiodic SRS-AS is triggered immediately;

[0126] earlySRS-AS-ResID (optional, 3-5 bits): References the pre-configured SRS-AS resource template ID. If this field is omitted, the default resource template of the current secondary cell is used.

[0127] Δ_srs (optional, 3-4 bits): The time offset (in time slots) of SRS relative to the completion of secondary cell activation command reception (e.g., the time slot boundary of reception completion). If this field is omitted, Δ_srs is the default value (e.g., 1).

[0128] prio(A-CSI_vs_SRS) (optional, 1 bit): indicates the priority when A-CSI and SRS conflict. By default, A-CSI transmission is limited when a conflict occurs.

[0129] In this way, the same MAC CE is still used, but a new field is added to the cell activation command for secondary cell activation or to the IE. This way, when activating the secondary cell, the indicator bit for early triggering of the target signal and related parameters such as the resource index are carried at the same time. Early triggering of SRS can be achieved during the process of indicating secondary cell activation. Of course, the network device can also choose not to carry earlySRS-AS-ResID. In this case, the terminal device uses the default resource to send SRS-AS.

[0130] For example, the first piece of information may include some or all of the following parameters:

[0131] earlyCSI-RS-trigger (1 bit): A value of 1 in this field indicates that an aperiodic CSI-RS is triggered immediately (in the current secondary cell);

[0132] earlyCSI-RS-SetID (N bit): Refers to a pre-configured set of CSI-RS resources (may only include sparse ports);

[0133] Δ_csi-rs (M bit): The time offset of CSI-RS relative to the secondary cell activation command (in time slots). If this field is omitted, Δ_csi-rs is the default value.

[0134] earlyA-CSI-trigger(1bit): A value of 1 in this field indicates that an A-CSI report is triggered.

[0135] k2_for_A-CSI(K bit): The time offset (in time slots) between the end of CSI-RS and the PUSCH that sends A-CSI;

[0136] A-CSI-ReportStyleID: Select PMI+CQI or CQI only.

[0137] Alternatively, the secondary cell activation command may carry only some parameters, such as earlyCSI-RS-trigger, earlyCSI-RS-SetID, Δ_csi-rs, etc., and the A-CSI reporting may be triggered by a separate DCI 0_x (e.g., the CSI request bit carried in the UL authorization) following the first information.

[0138] The aforementioned pre-configured resource templates, resource sets, or report templates can be pre-configured, for example, through SIBs (e.g., SIB1 or SIBx) or RRC messages (e.g., RRC messages before or after terminal device connection). These resource templates, resource sets, or report templates can all be identified for subsequent indication. For example, the pre-configured content includes resource templates for transmitting uplink reference signals (e.g., SRS-AS), resource sets for transmitting downlink reference signals (e.g., CSI-RS), and report templates for transmitting channel state information (e.g., A-CSI). The terms "resource template" and "resource set" can be used interchangeably, or can be replaced with other terms.

[0139] The first information can indicate a target resource template among multiple pre-configured resource templates, which is used for transmitting uplink reference signals triggered in the current secondary cell; or it can indicate a target resource set among multiple pre-configured resource sets, which is used for receiving downlink reference signals; or it can indicate a target report template among multiple pre-configured report templates, which is used for reporting CSI. Alternatively, if no indication is given, the default resource or template can be used.

[0140] Here, the resource template for the uplink reference signal includes, for example, one or more of the following parameters: duty cycle of resource blocks or symbols, candidate period, power limit, indication of whether to compress the number of symbols, etc.; the resource set for the downlink reference signal includes, for example, a sparse port subset for measuring the downlink reference signal; and / or, the CSI reporting template includes CSI resources and reporting content, the reporting content including, for example, PMI and CQI, or including CQI but excluding PMI reporting.

[0141] In this embodiment, some or all of the uplink reference signal, downlink reference signal, and CSI can be triggered by the first information. For example, the first information can be used to trigger the transmission of the uplink reference signal; or, for another example, the first information can simultaneously trigger the uplink reference signal and CSI reporting. In this way, a single field can be introduced in the secondary cell activation / deactivation MAC CE or the DCI used to indicate that the secondary cell has exited the dormant state to simultaneously indicate the trigger status indication associated with the CSI report configuration and / or SRS resource configuration. For example, a trigger status indication value of 1 indicates that early SRS and CSI are triggered, that is, CSI reporting and SRS can be triggered simultaneously.

[0142] In addition to introducing trigger status indications and corresponding resource information in the MAC CE used for secondary cell activation / deactivation or the DCI used to indicate that the secondary cell has exited the dormant state, optionally, uplink grant information corresponding to the PUSCH of the CSI can also be introduced, such as some or all of the parameters including PUSCH frequency resource allocation, PUSCH time resource allocation, MCS, power control, etc.

[0143] For example, during the transition of a terminal device from an inactive state to an active state in a secondary cell, the secondary cell activation / deactivation MAC CE can be extended to simultaneously trigger AP SRS and AP CSI reports associated with AP CSI-RS. For instance, the secondary cell activation / deactivation MAC CE includes a CSI trigger status indication field associated with CSI report configuration and / or SRS resource set, as well as a new field for DG-PUSCH used to indicate uplink grant information scheduling.

[0144] In this embodiment, the timeline between the uplink reference signal, downlink reference signal, and CSI is more complex. The transmission order of the uplink reference signal, downlink reference signal, and CSI can be indicated by the first information or configured by the network device. For example, the network device can pre-configure multiple transmission orders for the target signal and indicate one of these orders using the first information.

[0145] In some implementations, the transmission order of the target signal includes: uplink reference signal, downlink reference signal, and CSI transmitted sequentially; or, in other implementations, the uplink reference signal is transmitted before the secondary cell is activated or exits dormancy, and the downlink reference signal and CSI are transmitted after the secondary cell is activated or exits dormancy; or, in still other implementations, the uplink reference signal, downlink reference signal, and CSI are transmitted after the secondary cell is activated or exits dormancy. These implementations are described below.

[0146] The uplink reference signal needs to be transmitted as early as possible; therefore, preferably, it should be transmitted before the secondary cell activates or exits its dormant state. The following, in conjunction with... Figures 3 to 5 Using SRS, SCI-RS, and CSI as examples, the transmission timelines of SRS, SCI-RS, and CSI are described.

[0147] like Figure 3 As shown, the terminal device receives a secondary cell activation / deactivation MAC CE sent by the network device. This MAC CE instructs the terminal device to activate the secondary cell, and time slot n is the time slot in which the terminal device receives the MAC CE indicating secondary cell activation. This MAC CE carries first information instructing the terminal device to immediately transmit SRS after the HARQ-ACK for this MAC CE ends. In other words, the SRS transmission must occur before the secondary cell activation time ends. Here, the entire activation process takes the activation time, denoted as T_activation time. The end of T_activation time is the moment when the terminal device completes activation. There is usually a certain interval, such as 3 milliseconds, between T_activation time and the HARQ-ACK corresponding to the MAC CE to provide signal processing time for the terminal device. The time for CSI-RS measurement and CSI reporting after T_activation time is denoted as T_csi-report. In this scenario, the terminal device may perform SRS transmission before (or simultaneously) receiving SSB and / or antenna port tracking reference signal (AP-TRS) for time and frequency synchronization and / or automatic gain control (AGC) adjustment. After the T_activation time ends, i.e., after the terminal device completes activation, the network device triggers the terminal device to report CSI via another DCI. The terminal device receives CSI-RS after the K1 interval following this DCI and reports CSI after the K2 interval following this DCI.

[0148] like Figure 4 As shown, the terminal device transmits the SRS after the T_activation time has ended. That is, the transmissions of SRS, CSI-RS, and CSI all occur after the T_activation time has ended. In this case, the terminal device may transmit the SRS before receiving the CSI-RS to generate a PMI-free report for TDD.

[0149] When a secondary cell switches from an inactive state to an active state, the early triggering of SRS can occur within T_activationtime or throughout the entire T_csi-report period. From the perspective of the terminal device implementation, Figure 4 The terminal device shown has already achieved time and / or frequency synchronization during the T_activation time, therefore, SRS transmission can be performed using precise timing and frequency settings. On the other hand, compared to Figure 4 , Figure 3 The terminal device shown transmits SRS-AS earlier, thus further shortening the activation time of the terminal device.

[0150] In some implementations, the uplink reference signal, downlink reference signal, and CSI are triggered by the first message; or, in other implementations, the uplink reference signal is triggered by the first message, while the downlink reference signal and CSI are triggered by other messages following the first message (e.g., messages transmitted after secondary cell activation or exit from sleep state). That is, the first message can trigger the transmission of some or all of the uplink reference signal, downlink reference signal, and CSI, while other target signals can be triggered by other messages.

[0151] For example, such as Figure 5 As shown, it is to Figure 4 The DCI used to trigger CSI reporting is removed, thus minimizing the time required to activate the secondary cell. That is, by removing the DCI used to trigger CSI reporting and the corresponding CSI-RS, the activation time of the secondary cell is reduced to a minimum. Optionally, the necessary information required to trigger CSI reporting and the corresponding CSI-RS can also be provided in the secondary cell activation command. In other words, SRS, CSI-RS, and CSI are triggered simultaneously via MAC CE.

[0152] When a secondary cell switches from an inactive state to an active state, early triggering of the SRS can introduce the capability of the terminal device to ensure sufficient accuracy of the SRS transmitted by the terminal device during the T_csi-report. For example... Figure 5As shown, time slot n is the time slot in which the terminal device receives the MAC CE indicating secondary cell activation, and time slot n+m is the time when the terminal device sends the HARQ-ACK for that MAC CE. Time slot n can be used as a reference time to determine the SRS transmission time, transmitting aperiodic SRS in time slot n+K3. Time slot n+m can also be used as a reference time to determine the CSI-RS and CSI report, receiving CSI-RS in time slot n+m+K1 and reporting CSI in time slot n+m+K2. This allows for earlier preparation and faster SRS transmission after the secondary cell is fully activated. K1, K2, and K3 are the offset times of CSI-RS, CSI, and SRS relative to the reference time (e.g., the end time of the MAC CE or HARQ-ACK), respectively.

[0153] Figures 3 to 5 The scenarios shown provide some flexibility for SRS transmission, such as configuring the offset parameters K1, K2, or K3 mentioned above. This is especially relevant when aperiodic SRS transmission occurs within the activation time T_activation time, for example... Figure 3 As shown, network devices may need to transmit both aperiodic TRS and SRS simultaneously within the T_activation time. This flexibility is beneficial when SRS-AS is triggered prematurely during the transition of a secondary cell from an inactive to an active state. The additional information in the secondary cell activation command may only include the offset parameter K3. The offset parameter K3 determines whether the early-triggered SRS occurs during the T_activation time or the T_csi-report time. Alternatively, the secondary cell activation command may include SRS resource information, which in turn includes the offset parameter K3. Of course, the reference time used to determine the transmission times of SRS, CSI-RS, and CSI can also be the time corresponding to MAC CE or HARQ-ACK. This application does not limit the reference time in its embodiments.

[0154] The following describes the relationship between the time positions of the uplink reference signal, the downlink reference signal, and the CSI. Let δ X ∈[0,Tslot), representing the symbol / sampling start offset within the time slot; n is the reference time slot, here taking time slot n as the time slot index where the terminal device receives and parses the secondary cell activation / deactivation MAC CE; the starting symbol or offset within the time slot is δ. DL ,δ UL ∈[0,T slot For simplicity, the value can also be 0; the downlink processing time of the terminal device is... For example, it includes 1-2 time slots; the uplink processing time of the terminal device is... For example, it includes 1-2 time slots; T meas The calculation time from receiving the downlink reference signal to calculating the CSI report content (e.g., PMI and / or CQI) and the duration of the half-duplex / switching protection interval are given by the terminal device, for example, 1 millisecond; K1, K2 and K3 are the offset times of the downlink reference signal, CSI and uplink reference signal relative to the reference time (e.g., reference slot or reference time slot n), respectively, in units such as time slot or millisecond.

[0155] Taking the upstream reference signal SRS, downstream reference signals CSI-RS and CSI as examples, the transmission time of each target signal is determined based on the following formula:

[0156] Downlink CSI-RS transmission timing:

[0157] Uplink CSI PUSCH transmission timing:

[0158] Uplink SRS transmission time:

[0159] CSI must be measured later than the CSI-RS it depends on; therefore, the following time relationship exists between CSI and CSI-RS:

[0160]

[0161] This yields the lower bound of the discretized offset time (calculated in time slots), which is essentially converting the minimum waiting requirement in continuous time into an integer offset lower bound in time slots:

[0162]

[0163] in, This refers to the duration of this CSI-RS transmission, which can include 1-2 symbols or be approximated as 0.

[0164] If the terminal device is operating in half-duplex mode, such as a Redcap terminal, then half-duplex avoidance is required, and a guard interval T must be set. hd That is, switching between up and down lines. Half-duplex / switching protection, for example, greater than or equal to 1 symbol (calculated in TDD mode).

[0165] For the same carrier and the same terminal equipment, the symbol-level constraints for CSI-RS include: if the uplink transmission time slot n UL =n CSI-RS , then i UL,start ≥i DL,end +Gsym .

[0166] To avoid collisions between uplink signals in the same time slot, symbol-level constraints for SRS include, for example: if n UL =n SRS Then, signals (or events) are sorted according to priority, with lower priority signals (or events) being postponed, for example, by one time slot or more.

[0167] The earliest available time for the target signal, i.e., the lower bound of the processing time, includes:

[0168]

[0169] Among them, i UL,start For OFDM symbol indices starting with uplink transmissions (e.g., SRS, or CSI PUSCH) within the same time slot, i DL,end The index of the last occupied symbol in downlink reception (e.g., CSI-RS, PDSCH, DCI, etc.) within the same time slot, G sym The protection interval is at the symbol level and is used to indicate the minimum number of OFDM symbols that need to be freed up during DL→UL or UL→DL switching.

[0170] If a collision occurs between CSI-RS and CSI time slots, the first step is to check if the time slot indices are equal. For example, if n CSI =n CSI-RS Then it proceeds to the symbol-level determination. For example, if i UL,start DL,end +G sym A conflict will occur, and the lower-priority signal (or event) will be delayed by one or more time slots, for example, by incrementing the aforementioned offset parameter by 1. If in adjacent time slots, if n CSI =n CSI-RS +1, then it is guaranteed that (n) A-CSI ―n CSI-RS )·T slot +δ UL ―δ DL ≥T hd For n CSI-RS =n CSI The case of +1 is similar.

[0171] ​A secondary cell in an inactive state may be placed in a power-saving state, also known as a dormant state. A secondary cell can enter a dormant state by switching its BWP to a BWP configured for dormancy by the network device. In a dormant BWP, terminal devices can, for example, stop monitoring the PDCCH on the secondary cell, but if configured, may still continue operations such as CSI measurements, automatic gain control (AGC), and beam management. Alternatively, a secondary cell can also switch between dormant and wake-up states via DCI signaling. For example, outside of the active time of discontinuous reception (DRX), the secondary cell can be switched into or out of dormant state using DCI format 2_6. Conversely, during the active time of DRX, the secondary cell can be switched into or out of dormant state using DCI formats 0_1, 0_3, 1_1, and 1_3. Since entering a dormant state can be controlled by DCI signaling, this mechanism is generally faster than activating / deactivating the secondary cell. However, if the terminal device can transmit the uplink reference signal in advance, the time required to exit the sleep state can be further reduced.

[0172] As an example, the DCI format used to indicate that a secondary cell is exiting a dormant state may include, for example, UL-authorized DCI format 0_0 or DCI format 0_3, DL-scheduling DCI format 1_0 or DCI format 1_3, or DCI format 2_6. Specifically, DCI format 2_6 PDCCH or CORESET wake-up signal WUS is used when the primary cell (e.g., PCell) is not in the DRX active period.

[0173] In some implementations, embodiments of this application may employ a low-frequency domain density CSI-RS resource aggregation mechanism. For example, the downlink reference signal includes ZP CSI-RS and NZP CSI-RS, wherein the resource elements (REs) occupied by the NZP CSI-RS are aligned with the RE grid occupied by the ZP CSI-RS with a frequency domain density of 1 or 1 / 2. This aggregation of multiple low-density NZP CSI-RSs in the frequency domain, aligned with the RE grid of the ZP-CSI-RS used for rate matching, facilitates low-overhead coarse measurements in large-port (i.e., port number expansion) scenarios, ensuring backward compatibility while balancing energy consumption and accuracy. For example, for TDD scenarios, PMI-free CRI-RI-CQI reporting can be used for rapid start-up; for FDD scenarios, CRI-RI-PMI-CQI-based reporting is supported to determine precoding as early as possible.

[0174] Specifically, this involves configuring the NZP-CSI-RS resource mapping to fall within the ZP-CSI-RS mask used for rate matching in traditional terminal devices. Here, the mask refers to, for example, a mesh that marks certain REs as "unavailable for PDSCH mapping / demodulation." Network devices, through higher-level configuration, declare these REs as reserved bits, allowing terminal devices to bypass these REs when performing PDSCH resource mapping and rate matching (equivalent to punching holes in the time-frequency mesh). This allows traditional terminal devices to still perform rate matching according to the ZP-CSI-RS mask, avoiding RE waste. If the NZP-CSI-RS are low-density (e.g., frequency domain density of 1 / 4 or 1 / 8) large-port resources, multiple NZP-CSI-RS can be aggregated in the frequency domain, ensuring that the equivalent density after aggregating the low-density NZP-CSI-RS falls within 1 or 1 / 2, while maintaining RE alignment. In other words, when introducing NZP-CSI-RS with low frequency domain density, it is necessary to not affect the original frequency domain density (e.g., support 1, 1 / 2 or 3, where frequency domain density 3 is only applicable to CSI-RS used for beam management or CSI-RS used for tracking), that is, the equivalent frequency domain density remains unchanged when both NZP-CSI-RS and ZP-CSI-RS exist (e.g., still 1, 1 / 2 or 3).

[0175] Network devices can configure multiple sets of periodic or semi-persistent P / SP-CSI-RS via RRC signaling, and can also trigger aperiodic AP-CSI-RS as needed. Multiple CSI-RS can exist within the same time slot or subframe, and can be transmitted based on time division or distributed across different BWPs or carriers. The frequency domain patterns of each CSI-RS resource can be independent of each other. If low-density large-port CSI-RS are transmitted simultaneously, the rate matching of traditional terminal equipment may not be able to "exactly utilize" these REs, potentially resulting in a small amount of wasted data REs or increased implementation complexity. To support backward compatibility, introducing a lower CSI-RS frequency domain density should not affect the traditional rate matching specifications on the original CSI-RS REs. For example, in some embodiments, downlink reference signals transmitted within the same cell include Type I CSI-RS and Type II CSI-RS, with different frequency domain densities for Type I and Type II CSI-RS.

[0176] Specifically, for a cell that has both traditional terminal equipment and enhanced terminal equipment supporting the embodiments of this application, two sets of CSI-RS can be transmitted in the cell, namely high-frequency domain density and low-frequency domain density CSI-RS.

[0177] For example, the first group of CSI-RS has 32 ports and a frequency domain density of 1 / 2; the second group of CSI-RS has 128 ports and a frequency domain density of 1 / 8. The first group of CSI-RS is used to serve traditional terminal devices, and the second group of CSI-RS is used to serve enhanced terminal devices supporting the embodiments of this application for coarse measurement. Traditional terminal devices need to perform rate matching on the REs occupied by NZP-CSI-RS based on ZP CSI-RS resources. Since traditional terminal devices only support ZP CSI-RS resources with frequency domain densities of 3, 1, and 1 / 2, to avoid resource waste, the REs occupied by NAP-CSI-RS should be matched with the REs occupied by ZP CSI-RS resources with a frequency domain density of 1 or 1 / 2.

[0178] After aggregating N low-density NZP CSI-RS resources, the frequency domain density of each resource is ρ, for example, satisfying: In this way, the equivalent frequency domain density of CSI-RS after aggregating the low-density CSI-RS precisely maps to the frequency domain density of ZP-CSI-RS supported by traditional terminal devices (e.g., 1 or 1 / 2), avoiding resource waste. Furthermore, these resources can be allocated within 1-2 consecutive time slots. A parallel window (e.g., 1-2 time slots) is provided, in which two sets of CSI-RS are executed concurrently, and one or more of the following conditions can be met:

[0179] Half-duplex / symbol-level protection: When the uplink transmission and the uplink CSI or SRS are in different time slots, or in the same time slot, a symbol-level protection interval is reserved in that time slot;

[0180] Power and port orthogonality: Port mapping and EPRE total power conservation;

[0181] Conflict priority: If an uplink transmission in the same time slot conflicts with a CSI PUSCH, the CSI transmission takes priority and the uplink transmission can be transmitted in the next candidate resource.

[0182] RE Alignment: After aggregating low-density NZP-CSI-RS, the CSI-RS RE must be aligned to the existing ZP-CSI-RS RE mesh to ensure backward compatibility.

[0183] Alternatively, to reduce CSI-RS overhead for large ports (e.g., 48, 64, and 128 ports), new subband sizes (e.g., PRB number) can be introduced. For example, smaller subband sizes are suitable for smaller bandwidth BWPs, and larger subband sizes are suitable for larger BWPs. As an example, a subband size of 6 PRBs is suitable for BWPs with 24-72 PRBs; a subband size of 12 PRBs is suitable for BWPs with 73-144 PRBs; and a subband size of 24 PRBs is suitable for BWPs with 145-275 PRBs.

[0184] One embodiment is that the CSI-RS frequency domain density ρ = 1 / 4 can be configured as K NZ PCSI-RS resources in the following case:

[0185] K = Two 24-port NZP CSI-RS resources aggregated from a CSI-RS resource set of 48 CSI-RS ports;

[0186] K = 4 16-port NZP CSI-RS resources aggregated from the CSI-RS resource set of 64 CSI-RS ports;

[0187] K = Two 32-port NZP CSI-RS resources aggregated from a CSI-RS resource set of 64 CSI-RS ports;

[0188] K = A CSI-RS resource set aggregating 128 CSI-RS ports can be based on K = 4 32-port NZP CSI-RS resources;

[0189] K = A CSI-RS resource set aggregating 48 CSI-RS ports can be based on K = 3 16-port NZP CSI resources.

[0190] Note: It is possible that the frequency domain density of the K NZP CSI-RS resources in the same CSI-RS resource set aggregated for 48 / 64 / 128 CSI-RS ports may be different.

[0191] Alternatively, in another embodiment, the CSI-RS frequency domain densities ρ = 1 / 3 and 1 / 6 can be configured as K NZP CSI-RS resources in the following cases:

[0192] K = 3 16-port NZP CSI-RS resources aggregated from 48 CSI-RS ports;

[0193] K = Two 24-port NZP CSI-RS resources in a CSI-RS resource set that aggregates 48 CSI-RS ports.

[0194] Note: It is possible that the frequency domain density of the K NZP CSI-RS configured for the same CSI-RS resource set aggregated for 48 CSI-RS ports may be different.

[0195] Network devices can allocate CSI-RS resources for multiple terminal devices on the same symbol. For example, a network device can configure CSI-RS resources for two terminal devices on the same symbol, with each terminal device corresponding to two CSI-RS resources, for a total of four CSI-RS resources. These four CSI-RS resources will then occupy 1 / 2 of the RB, which matches well with a ZPCSI-RS density of 1 / 2. It is also possible to support a density configuration of 1 / 8 for aggregated CSI-RS resources with K=2.

[0196] Reducing the frequency domain density helps decrease CSI-RS overhead, and a cyclic RB mapping mode can also be used in the time domain. That is, the RB position of CSI-RS may differ in different time instances or transmission scenarios. Then, the terminal device can combine CSI-RS measurements across multiple time instances to improve the accuracy of channel measurements. Two subband sizes can be configured based on the BWP bandwidth. A smaller frequency domain density can be configured, and subband sizes of 4 or 8 can also be configured. Subband sizes can, for example, be integer multiples of 1 / ρ.

[0197] The above text combined Figures 1 to 5 The method embodiments of this application are described in detail below, in conjunction with... Figures 6 to 8 The present application provides a detailed description of the apparatus embodiments. It should be understood that the descriptions of the method embodiments correspond to the descriptions of the apparatus embodiments; therefore, any parts not described in detail can be found in the foregoing method embodiments.

[0198] Figure 6 This is a schematic diagram of the structure of a terminal device provided in an embodiment of this application. Figure 6 The terminal device 600 shown may include a transceiver unit 610. The transceiver unit 610 is used to receive first information sent by a network device. The first information is used to trigger the reception or transmission of a target signal. The target signal includes one or more of the following: an uplink reference signal; a downlink reference signal; and a CSI. The first information is sent by the network device during uplink random access; or, the first information is sent by the network device during secondary cell activation or exit from sleep mode.

[0199] In some implementations, the uplink reference signal includes SRS or AS-SRS; and / or, the downlink reference signal includes CSI-RS or SSB.

[0200] In some implementations, the target signal includes an aperiodic signal or a semi-persistent signal.

[0201] In some implementations, the first information is carried in the last message of the uplink random access process.

[0202] In some implementations, the uplink reference signal, the downlink reference signal, and the CSI are triggered by the first information; and / or, the uplink reference signal and the downlink reference signal are triggered by the first information, and the CSI is triggered by other messages following the first information.

[0203] In some implementations, the last message includes a PDSCH, and the first information is carried in the MAC CE of the PDSCH; or, the last message includes a PDCCH, and the first information is carried in the PDCCH.

[0204] In some implementations, the first information includes one or more of the following: reference time; the transmission time of the target signal, with a time offset relative to the reference time; configuration information for receiving or transmitting the target signal; trigger status information for indicating whether the target signal is triggered; uplink grant information corresponding to the PUSCH carrying the CSI; coding rate scaling parameters corresponding to the PUSCH carrying the CSI; and the transmission order of the uplink reference signal, downlink reference signal, and CSI.

[0205] In some implementations, the reference time is determined based on the following times: the time corresponding to the first information; or the time corresponding to the feedback information of the first information; or the first time available for uplink transmission after the first information.

[0206] In some implementations, the transceiver unit 610 is further configured to receive second information sent by the network device, the second information including one or more configuration information for receiving or sending the target signal.

[0207] In some implementations, the second information is carried in a System Information Block (SIB); and / or, the second information is carried in the last message of the uplink random access process; and / or, the second information is carried in other downlink messages of the uplink random access process; and / or, the second information is carried in RRC signaling.

[0208] In some implementations, the second information is associated with one or more of the following capabilities: the ability to trigger the target signal based on the first information, radio frequency hardware capabilities, the maximum transmission bandwidth of the supported uplink reference signal, the maximum number of ports of the supported downlink reference signal, and the maximum transmission bandwidth of the supported downlink reference signal.

[0209] In some implementations, the transceiver unit 610 is further configured to: send third information to the network device; wherein the third information is used to indicate whether the terminal device supports the configuration information indicated by the second information; the third information is used to indicate the configuration information supported by the terminal device among the plurality of configuration information indicated by the second information; and the third information is used to indicate the capabilities supported by the terminal device.

[0210] In some implementations, the third information is carried in the third message during the uplink random access process, wherein reserved bits in the third message are used to carry the third information; or, the third information is associated with the logical channel identifier in the third message.

[0211] In some implementations, the transmission order of the target signal includes: the uplink reference signal, the downlink reference signal, and the CSI are transmitted sequentially; or, the downlink reference signal, the CSI, and the uplink reference signal are transmitted sequentially; or, the uplink reference signal is transmitted at at least one first time position within a detection window after the first information, the downlink reference signal is transmitted at at least one second time position within the detection window, and the CSI is transmitted at the first resource position available for uplink transmission after the downlink reference signal is completed.

[0212] In some implementations, the last message in the uplink random access process includes a DCI, wherein reserved bits in the DCI are used to carry the first information; or, the DCI includes newly added bits, which are used to carry the first information.

[0213] In some implementations, the first information is carried in a message indicating that the secondary cell is activated, or in a message indicating that the secondary cell is exiting its dormant state.

[0214] In some implementations, the first information includes one or more of the following: indication information for indicating immediate triggering of the uplink reference signal; a target resource template identifier for transmitting the uplink reference signal among a plurality of pre-configured uplink reference signal resource templates; the time offset of the transmission time of the uplink reference signal relative to the first information; the time offset of the transmission time of the uplink reference signal relative to the feedback information corresponding to the first information; and priority information of the uplink reference signal and the CSI.

[0215] In some implementations, the first information includes one or more of the following: indication information for immediately triggering the downlink reference signal; a target resource set identifier for indicating a pre-configured set of downlink reference signal resources used for transmitting the downlink reference signal; the time offset of the downlink reference signal relative to the first information; the time offset of the downlink reference signal relative to the feedback information corresponding to the first information; indication information for immediately reporting the CSI; the time offset between the reporting time of the CSI and the downlink reference signal; an identifier of the CSI report template; and uplink authorization information corresponding to the PUSCH carrying the CSI.

[0216] In some implementations, the transceiver unit 610 is further configured to: receive pre-configuration information sent by the network device, the pre-configuration information including one or more of the following: a resource template for transmitting the uplink reference signal; a resource set for transmitting the downlink reference signal; a report template for transmitting the CSI; wherein the pre-configuration information is carried in SIB or RRC signaling.

[0217] In some implementations, the resource template of the uplink reference signal includes one or more of the following: duty cycle of resource blocks or symbols, candidate period, power limit, and indication of whether to compress the number of symbols; and / or, the resource set of the downlink reference signal includes a sparse port subset for measuring the downlink reference signal; and / or, the reporting template of the CSI includes CSI resources and / or CSI content, wherein the CSI content includes PMI and CQI, or includes CQI but does not include PMI.

[0218] In some implementations, the transmission time of the target signal satisfies one or more of the following: the interval between the target signal and the first information is a predetermined duration; the interval between the target signal and the feedback information corresponding to the first information is a predetermined duration; the interval between the target signal and the tracking reference signal (TRS) sent by the network device is a predetermined duration; and the transmission time is equal to the end time of the TRS.

[0219] In some implementations, the transmission order of the target signal includes: the uplink reference signal, the downlink reference signal, and the CSI are transmitted sequentially; or, the uplink reference signal is transmitted before the secondary cell is activated or exits the dormant state, and the downlink reference signal and the CSI are transmitted after the secondary cell is activated or exits the dormant state; or, the uplink reference signal, the downlink reference signal, and the CSI are transmitted after the secondary cell is activated or exits the dormant state.

[0220] In some implementations, the uplink reference signal, the downlink reference signal, and the CSI are triggered by the first information; or, the uplink reference signal is triggered by the first information, and the downlink reference signal and the CSI are triggered by other messages following the first information, wherein the other messages include messages transmitted after the secondary cell is activated or exits its dormant state.

[0221] In some implementations, the message used to indicate that the secondary cell is exiting the dormant state includes one or more of the following DCI formats: DCI format 0_0, DCI format 0_1, DCI format 0_3, DCI format 1_0, DCI format 1_1, DCI format 1_3, and DCI format 2_6.

[0222] In some implementations, the downlink reference signal includes ZP CSI-RS and NZP CSI-RS, wherein the resource element RE occupied by the NZP CSI-RS is matched with the RE occupied by the ZP CSI-RS with a frequency domain density of 1 or 1 / 2; and / or, the downlink reference signal transmitted within the same cell includes a first type CSI-RS and a second type CSI-RS, wherein the frequency domain densities corresponding to the first type CSI-RS and the second type CSI-RS are different.

[0223] It is understood that the transceiver unit 610 may be, for example, a transceiver 830. Additionally, optionally, the terminal device 600 may also include a processor 810 and a memory 820, see details below. Figure 8 .

[0224] Figure 7 This is a schematic diagram of the network device provided in an embodiment of this application. Figure 7 The network device 700 shown may include a transceiver unit 710. The transceiver unit 710 is used to send first information to a terminal device, the first information being used to trigger the reception or transmission of a target signal, the target signal including one or more of the following: an uplink reference signal; a downlink reference signal; a CSI; wherein, the first information is sent by the network device during uplink random access; or, the first information is sent by the network device during secondary cell activation or exit from sleep state.

[0225] In some implementations, the uplink reference signal includes SRS or AS-SRS; and / or, the downlink reference signal includes CSI-RS or SSB.

[0226] In some implementations, the target signal includes an aperiodic signal or a semi-persistent signal.

[0227] In some implementations, the first information is carried in the last message of the uplink random access process.

[0228] In some implementations, the uplink reference signal, the downlink reference signal, and the CSI are triggered by the first information; and / or, the uplink reference signal and the downlink reference signal are triggered by the first information, and the CSI is triggered by other messages following the first information.

[0229] In some implementations, the last message includes a PDSCH, and the first information is carried in the MAC CE of the PDSCH; or, the last message includes a PDCCH, and the first information is carried in the PDCCH.

[0230] In some implementations, the first information includes one or more of the following: reference time; the transmission time of the target signal, with a time offset relative to the reference time; configuration information for receiving or transmitting the target signal; trigger status information for indicating whether the target signal is triggered; uplink grant information corresponding to the PUSCH carrying the CSI; coding rate scaling parameters corresponding to the PUSCH carrying the CSI; and the transmission order of the uplink reference signal, downlink reference signal, and CSI.

[0231] In some implementations, the reference time is determined based on the following times: the time corresponding to the first information; or the time corresponding to the feedback information of the first information; or the first time available for uplink transmission after the first information.

[0232] In some implementations, the transceiver unit 710 is further configured to: send second information to the terminal device, the second information including one or more configuration information for receiving or sending the target signal.

[0233] In some implementations, the second information is carried in a System Information Block (SIB); and / or, the second information is carried in the last message of the uplink random access process; and / or, the second information is carried in other downlink messages of the uplink random access process; and / or, the second information is carried in RRC signaling.

[0234] In some implementations, the second information is associated with one or more of the following capabilities: the ability to trigger the target signal based on the first information, radio frequency hardware capabilities, the maximum transmission bandwidth of the supported uplink reference signal, the maximum number of ports of the supported downlink reference signal, and the maximum transmission bandwidth of the supported downlink reference signal.

[0235] In some implementations, the transceiver unit 710 is further configured to: receive third information sent by the terminal device; wherein the third information is used to indicate whether the terminal device supports the configuration information indicated by the second information; the third information is used to indicate the configuration information supported by the terminal device among the plurality of configuration information indicated by the second information; and the third information is used to indicate the capabilities supported by the terminal device.

[0236] In some implementations, the third information is carried in the third message during the uplink random access process, wherein reserved bits in the third message are used to carry the third information; or, the third information is associated with the logical channel identifier in the third message.

[0237] In some implementations, the transmission order of the target signal includes: the uplink reference signal, the downlink reference signal, and the CSI are transmitted sequentially; or, the downlink reference signal, the CSI, and the uplink reference signal are transmitted sequentially; or, the uplink reference signal is transmitted at at least one first time position within a detection window after the first information, the downlink reference signal is transmitted at at least one second time position within the detection window, and the CSI is transmitted at the first resource position available for uplink transmission after the downlink reference signal is completed.

[0238] In some implementations, the last message in the uplink random access process includes a DCI, wherein reserved bits in the DCI are used to carry the first information; or, the DCI includes newly added bits, which are used to carry the first information.

[0239] In some implementations, the first information is carried in a message indicating that the secondary cell is activated, or in a message indicating that the secondary cell is exiting its dormant state.

[0240] In some implementations, the first information includes one or more of the following: indication information for indicating immediate triggering of the uplink reference signal; a target resource template identifier for transmitting the uplink reference signal among a plurality of pre-configured uplink reference signal resource templates; the time offset of the transmission time of the uplink reference signal relative to the first information; the time offset of the transmission time of the uplink reference signal relative to the feedback information corresponding to the first information; and priority information of the uplink reference signal and the CSI.

[0241] In some implementations, the first information includes one or more of the following: indication information for immediately triggering the downlink reference signal; a target resource set identifier for indicating a pre-configured set of downlink reference signal resources used for transmitting the downlink reference signal; the time offset of the downlink reference signal relative to the first information; the time offset of the downlink reference signal relative to the feedback information corresponding to the first information; indication information for immediately reporting the CSI; the time offset between the reporting time of the CSI and the downlink reference signal; an identifier of the CSI report template; and uplink authorization information corresponding to the PUSCH carrying the CSI.

[0242] In some implementations, the transceiver unit 710 is further configured to: send pre-configuration information to the terminal device, the pre-configuration information including one or more of the following: a resource template for transmitting the uplink reference signal; a resource set for transmitting the downlink reference signal; a report template for transmitting the CSI; wherein the pre-configuration information is carried in SIB or RRC signaling.

[0243] In some implementations, the resource template of the uplink reference signal includes one or more of the following: duty cycle of resource blocks or symbols, candidate period, power limit, and indication of whether to compress the number of symbols; and / or, the resource set of the downlink reference signal includes a sparse port subset for measuring the downlink reference signal; and / or, the reporting template of the CSI includes CSI resources and / or CSI content, wherein the CSI content includes PMI and CQI, or includes CQI but does not include PMI.

[0244] In some implementations, the transmission time of the target signal satisfies one or more of the following: the interval between the target signal and the first information is a predetermined duration; the interval between the target signal and the feedback information corresponding to the first information is a predetermined duration; the interval between the target signal and the tracking reference signal (TRS) sent by the network device is a predetermined duration; and the transmission time is equal to the end time of the TRS.

[0245] In some implementations, the transmission order of the target signal includes: the uplink reference signal, the downlink reference signal, and the CSI are transmitted sequentially; or, the uplink reference signal is transmitted before the secondary cell is activated or exits the dormant state, and the downlink reference signal and the CSI are transmitted after the secondary cell is activated or exits the dormant state; or, the uplink reference signal, the downlink reference signal, and the CSI are transmitted after the secondary cell is activated or exits the dormant state.

[0246] In some implementations, the uplink reference signal, the downlink reference signal, and the CSI are triggered by the first information; or, the uplink reference signal is triggered by the first information, and the downlink reference signal and the CSI are triggered by other messages following the first information, wherein the other messages include messages transmitted after the secondary cell is activated or exits its dormant state.

[0247] In some implementations, the message used to indicate that the secondary cell is exiting the dormant state includes one or more of the following DCI formats: DCI format 0_0, DCI format 0_1, DCI format 0_3, DCI format 1_0, DCI format 1_1, DCI format 1_3, and DCI format 2_6.

[0248] In some implementations, the downlink reference signal includes ZP CSI-RS and NZP CSI-RS, wherein the resource element RE occupied by the NZP CSI-RS is matched with the RE occupied by the ZP CSI-RS with a frequency domain density of 1 or 1 / 2; and / or, the downlink reference signal transmitted within the same cell includes a first type CSI-RS and a second type CSI-RS, wherein the frequency domain densities corresponding to the first type CSI-RS and the second type CSI-RS are different.

[0249] It is understood that the transceiver unit 710 may be, for example, a transceiver 830. Additionally, optionally, the network device 700 may also include a processor 810 and a memory 820, see details below. Figure 8 .

[0250] Figure 8 This is a schematic structural diagram of a communication apparatus according to an embodiment of this application. Figure 8 The dashed lines shown indicate that the unit or module is optional. The device 800 can be used to implement the methods described in the above method embodiments. The device 800 may be, for example, a chip, a terminal device, or a network device.

[0251] The apparatus 800 may include one or more processors 810. The processors 810 may support the apparatus 800 in implementing the methods described in the foregoing method embodiments. The processor 810 may be a general-purpose processor or a special-purpose processor. For example, the processor 810 may be a central processing unit (CPU). Alternatively, the processor 810 may also be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor.

[0252] The apparatus 800 may further include one or more memories 820. The memories 820 store programs that can be executed by the processor 810, causing the processor 810 to perform the methods described in the above method embodiments. The memories 820 may be independent of the processor 810, or they may be integrated into the processor 810.

[0253] The device 800 may also include a transceiver 830. The processor 810 can communicate with other devices or chips via the transceiver 830. For example, the processor 810 can send and receive data with other devices or chips via the transceiver 830.

[0254] This application also provides a communication system. The communication system includes the terminal device and network device described above. In some implementations, the system further includes other devices that interact with the terminal device and network device.

[0255] This application also provides a computer-readable storage medium for storing a program. This computer-readable storage medium can be applied to a terminal device or network device provided in this application, and the program causes a computer to execute the methods performed by the terminal device or network device in various embodiments of this application.

[0256] This application also provides a computer program product. The computer program product includes a program. This computer program product can be applied to a terminal device or network device provided in this application embodiment, and the program causes a computer to execute the methods performed by the terminal device or network device in the various embodiments of this application.

[0257] This application also provides a computer program. This computer program can be applied to the terminal device or network device provided in this application, and the computer program causes the computer to execute the methods performed by the terminal device or network device in the various embodiments of this application.

[0258] It should be understood that the terms "system" and "network" in the embodiments of this application can be used interchangeably. Furthermore, the terminology used in this application is only for explaining specific embodiments of this application and is not intended to limit this application. The terms "first," "second," "third," and "fourth," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. In addition, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0259] In the embodiments of this application, the term "instruction" can be a direct instruction, an indirect instruction, or an indication of a relationship. For example, A instructing B can mean that A directly instructs B, such as B being able to obtain information through A; it can also mean that A indirectly instructs B, such as A instructing C, so B can obtain information through C; or it can mean that there is a relationship between A and B.

[0260] In the embodiments of this application, "B corresponding to A" means that B is associated with A, and B can be determined based on A. However, it should also be understood that determining B based on A does not mean that B is determined solely based on A; B can also be determined based on A and / or other information.

[0261] In the embodiments of this application, the term "correspondence" can indicate a direct or indirect correspondence between two things, or an association between two things, or a relationship such as instruction and being instructed, configuration and being configured.

[0262] In this application embodiment, "predefined" or "preconfigured" can be implemented by pre-storing corresponding codes, tables, or other means that can be used to indicate relevant information in the device (e.g., including terminal devices and network devices). This application does not limit the specific implementation method. For example, predefined can refer to what is defined in the protocol.

[0263] In this application embodiment, the "protocol" may refer to a standard protocol in the field of communication, such as the LTE protocol, the NR protocol, and related protocols applied to future communication systems. This application does not limit this.

[0264] In the embodiments of this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0265] In the various embodiments of this application, the order of the above-mentioned processes does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0266] In the embodiments provided in this application, it is understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be indirect coupling or communication connection through some interfaces, devices, or units, and may be electrical, mechanical, or other forms.

[0267] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in the same position or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of the embodiments of this application, depending on actual needs.

[0268] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0269] In the above embodiments, implementation can be achieved entirely or partially through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented entirely or partially in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can read or a data storage device such as a server or data center that integrates one or more available media. The available media can be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., digital video discs (DVDs)), or semiconductor media (e.g., solid-state drives (SSDs)).

[0270] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A communication method, characterized in that, include: The terminal device receives first information sent by the network device, the first information being used to trigger the reception or transmission of a target signal, the target signal including one or more of the following: Upward reference signal; Downward reference signal; Channel State Information (CSI); Wherein, the first information is sent by the network device during uplink random access; or, the first information is sent by the network device during secondary cell activation or exit from dormancy.

2. The method according to claim 1, characterized in that, The uplink reference signal includes a sounding reference signal (SRS) or a sounding reference signal (AS-SRS) for antenna selection; and / or, the downlink reference signal includes a channel state information reference signal (CSI-RS) or a synchronization signal broadcast channel block (SSB).

3. The method according to claim 1 or 2, characterized in that, The target signal includes aperiodic signals or semi-persistent signals.

4. The method according to any one of claims 1 to 3, characterized in that, The first information is carried in the last message of the uplink random access process.

5. The method according to claim 4, characterized in that, The uplink reference signal, the downlink reference signal, and the CSI are triggered by the first information; and / or, The uplink reference signal and the downlink reference signal are triggered by the first information, and the CSI is triggered by other messages following the first information.

6. The method according to claim 4 or 5, characterized in that, The last message includes a PDSCH, and the first information is carried in the MAC CE within the PDSCH; or... The last message includes a PDCCH, and the first information is carried in the PDCCH.

7. The method according to any one of claims 4 to 6, characterized in that, The first information includes one or more of the following: Reference time; The transmission time of the target signal is offset relative to the reference time. Configuration information used to receive or send the target signal; Trigger status information, used to indicate whether the target signal has been triggered; Uplink authorization information corresponding to the PUSCH used to carry the CSI; The encoding rate scaling parameter used to carry the PUSCH of the CSI; The transmission order of uplink reference signal, downlink reference signal, and CSI.

8. The method according to claim 7, characterized in that, The reference time is determined based on the following time: The time corresponding to the first information; or, The time corresponding to the feedback information of the first information; or... The first available time for uplink transmission after the first piece of information.

9. The method according to any one of claims 4 to 8, characterized in that, The method further includes: The terminal device receives second information sent by the network device, the second information including one or more configuration information for receiving or sending the target signal.

10. The method according to claim 9, characterized in that, The second information is carried in the System Information Block (SIB); and / or, The second information is carried in the last message of the uplink random access process; and / or, The second information is carried in other downlink messages during the uplink random access process; and / or, The second information is carried in RRC signaling.

11. The method according to claim 9 or 10, characterized in that, The second information is associated with one or more of the following capabilities: the ability to trigger the target signal based on the first information, radio frequency hardware capabilities, the maximum transmission bandwidth of the supported uplink reference signal, the maximum number of ports supported for the supported downlink reference signal, and the maximum transmission bandwidth of the supported downlink reference signal.

12. The method according to any one of claims 9 to 11, characterized in that, The method further includes: The terminal device sends third information to the network device; The third information is used to indicate whether the terminal device supports the configuration information indicated by the second information; The third information is used to indicate the configuration information supported by the terminal device among the multiple configuration information indicated by the second information; The third piece of information is used to indicate the capabilities supported by the terminal device.

13. The method according to claim 12, characterized in that, The third information is carried in the third message during the uplink random access process, wherein, The reserved bits in the third message are used to carry the third information; or... The third piece of information is associated with the logical channel identifier in the third message.

14. The method according to any one of claims 4 to 13, characterized in that, The transmission sequence of the target signal includes: The uplink reference signal, the downlink reference signal, and the CSI are transmitted sequentially; or... The downlink reference signal, the CSI, and the uplink reference signal are transmitted sequentially; or... The uplink reference signal is transmitted at at least one first time position within the detection window following the first information, the downlink reference signal is transmitted at at least one second time position within the detection window, and the CSI is transmitted at the first resource position available for uplink transmission after the downlink reference signal is completed.

15. The method according to any one of claims 4 to 14, characterized in that, The last message in the uplink random access process includes DCI, where... The reserved bits in the DCI are used to carry the first information; or... The DCI includes newly added bits, which are used to carry the first information.

16. The method according to any one of claims 1 to 3, characterized in that, The first information is carried in a message indicating that the secondary cell is activated, or in a message indicating that the secondary cell is exiting the dormant state.

17. The method according to claim 16, characterized in that, The first information includes one or more of the following: Indication information used to indicate the immediate triggering of the uplink reference signal; Used to indicate the target resource template identifier among a plurality of pre-configured uplink reference signal resource templates for transmitting the uplink reference signal; The transmission time of the uplink reference signal is offset relative to the time of the first information; The transmission time of the uplink reference signal is offset from the time of the feedback information corresponding to the first information; The priority information of the uplink reference signal and the CSI.

18. The method according to claim 16 or 17, characterized in that, The first information includes one or more of the following: Indication information used to indicate the immediate triggering of the downlink reference signal; Used to indicate the target resource set identifier in a pre-configured set of multiple downlink reference signal resource sets for transmitting the downlink reference signal; The time offset of the downlink reference signal relative to the first information; The time offset of the downlink reference signal relative to the feedback information corresponding to the first information; Instruction information used to instruct the immediate reporting of the CSI; Used to indicate the time offset between the CSI reporting time and the downlink reference signal; The identifier of the CSI report template; Uplink authorization information corresponding to the PUSCH used to carry the CSI.

19. The method according to any one of claims 16 to 18, characterized in that, The method further includes: The terminal device receives pre-configuration information sent by the network device, the pre-configuration information including one or more of the following: Resource templates used for transmitting the uplink reference signals; The resource set used for transmitting the downlink reference signal; Report template used for transmitting the CSI; The pre-configuration information is carried in SIB or RRC signaling.

20. The method according to claim 19, characterized in that, The resource template of the uplink reference signal includes one or more of the following: the duty cycle of the resource block or symbol, the candidate period, the power limit, and an indication of whether to compress the number of symbols; And / or, The resource set of the downlink reference signal includes a sparse port subset for measuring the downlink reference signal; And / or, The CSI report template includes CSI resources and / or CSI content, which includes PMI and CQI, or includes CQI but excludes PMI.

21. The method according to any one of claims 16 to 20, characterized in that, The transmission time of the target signal satisfies one or more of the following: The interval between the first information and the first information is a predetermined time period; The interval between the feedback information corresponding to the first information is a predetermined time. The interval between the tracking reference signal (TRS) sent by the network device and the network device is a predetermined duration; It is equal to the end time of the TRS.

22. The method according to any one of claims 16 to 21, characterized in that, The transmission sequence of the target signal includes: The uplink reference signal, the downlink reference signal, and the CSI are transmitted sequentially; or... The uplink reference signal is transmitted before the secondary cell is activated or exits dormancy, and the downlink reference signal and the CSI are transmitted after the secondary cell is activated or exits dormancy; or... The uplink reference signal, the downlink reference signal, and the CSI are transmitted after the secondary cell is activated or exits its dormant state.

23. The method according to any one of claims 16 to 22, characterized in that, The uplink reference signal, the downlink reference signal, and the CSI are triggered by the first information; or... The uplink reference signal is triggered by the first information, and the downlink reference signal and the CSI are triggered by other messages after the first information, wherein the other messages include messages transmitted after the secondary cell is activated or exits the dormant state.

24. The method according to any one of claims 16 to 23, characterized in that, Messages used to indicate that a secondary cell is exiting a dormant state include one or more of the following DCI formats: DCI format 0_0, DCI format 0_1, DCI format 0_3, DCI format 1_0, DCI format 1_1, DCI format 1_3, and DCI format 2_6.

25. The method according to any one of claims 1 to 24, characterized in that, The downlink reference signal includes a zero-power channel state information reference signal (ZP CSI-RS) and a non-zero-power channel state information reference signal (NZP CSI-RS), wherein the resource elements (REs) occupied by the NZP CSI-RS are matched with the REs occupied by the ZP CSI-RS, which has a frequency domain density of 1 or 1 / 2; and / or, The downlink reference signals transmitted within the same cell include a first type of CSI-RS and a second type of CSI-RS, with different frequency domain densities for the first type of CSI-RS and the second type of CSI-RS.

26. A communication method, characterized in that, include: The network device sends first information to the terminal device, the first information being used to trigger the reception or transmission of a target signal, the target signal including one or more of the following: Upward reference signal; Downward reference signal; Channel State Information (CSI); Wherein, the first information is sent by the network device during uplink random access; or, the first information is sent by the network device during secondary cell activation or exit from dormancy.

27. The method according to claim 26, characterized in that, The uplink reference signal includes a sounding reference signal (SRS) or a sounding reference signal (AS-SRS) for antenna selection; and / or, the downlink reference signal includes a channel state information reference signal (CSI-RS) or a synchronization signal broadcast channel block (SSB).

28. The method according to claim 26 or 27, characterized in that, The target signal includes aperiodic signals or semi-persistent signals.

29. The method according to any one of claims 26 to 28, characterized in that, The first information is carried in the last message of the uplink random access process.

30. The method according to claim 29, characterized in that, The uplink reference signal, the downlink reference signal, and the CSI are triggered by the first information; and / or, The uplink reference signal and the downlink reference signal are triggered by the first information, and the CSI is triggered by other messages following the first information.

31. The method according to claim 29 or 30, characterized in that, The last message includes a PDSCH, and the first information is carried in the MAC CE within the PDSCH; or... The last message includes a PDCCH, and the first information is carried in the PDCCH.

32. The method according to any one of claims 29 to 31, characterized in that, The first information includes one or more of the following: Reference time; The transmission time of the target signal is offset relative to the reference time. Configuration information used to receive or send the target signal; Trigger status information, used to indicate whether the target signal has been triggered; Uplink authorization information corresponding to the PUSCH used to carry the CSI; The encoding rate scaling parameter used to carry the PUSCH of the CSI; The transmission order of uplink reference signal, downlink reference signal, and CSI.

33. The method according to claim 32, characterized in that, The reference time is determined based on the following time: The time corresponding to the first information; or, The time corresponding to the feedback information of the first information; or... The first available time for uplink transmission after the first piece of information.

34. The method according to any one of claims 29 to 33, characterized in that, The method further includes: The network device sends second information to the terminal device, the second information including one or more configuration information for receiving or sending the target signal.

35. The method according to claim 34, characterized in that, The second information is carried in the System Information Block (SIB); and / or, The second information is carried in the last message of the uplink random access process; and / or, The second information is carried in other downlink messages during the uplink random access process; and / or, The second information is carried in RRC signaling.

36. The method according to claim 34 or 35, characterized in that, The second information is associated with one or more of the following capabilities: the ability to trigger the target signal based on the first information, radio frequency hardware capabilities, the maximum transmission bandwidth of the supported uplink reference signal, the maximum number of ports supported for the supported downlink reference signal, and the maximum transmission bandwidth of the supported downlink reference signal.

37. The method according to any one of claims 34 to 36, characterized in that, The method further includes: The network device receives third information sent by the terminal device; The third information is used to indicate whether the terminal device supports the configuration information indicated by the second information; The third information is used to indicate the configuration information supported by the terminal device among the multiple configuration information indicated by the second information; The third piece of information is used to indicate the capabilities supported by the terminal device.

38. The method according to claim 37, characterized in that, The third information is carried in the third message during the uplink random access process, wherein, The reserved bits in the third message are used to carry the third information; or... The third piece of information is associated with the logical channel identifier in the third message.

39. The method according to any one of claims 29 to 38, characterized in that, The transmission sequence of the target signal includes: The uplink reference signal, the downlink reference signal, and the CSI are transmitted sequentially; or... The downlink reference signal, the CSI, and the uplink reference signal are transmitted sequentially; or... The uplink reference signal is transmitted at at least one first time position within the detection window following the first information, the downlink reference signal is transmitted at at least one second time position within the detection window, and the CSI is transmitted at the first resource position available for uplink transmission after the downlink reference signal is completed.

40. The method according to any one of claims 29 to 39, characterized in that, The last message in the uplink random access process includes DCI, where... The reserved bits in the DCI are used to carry the first information; or... The DCI includes newly added bits, which are used to carry the first information.

41. The method according to any one of claims 26 to 28, characterized in that, The first information is carried in a message indicating that the secondary cell is activated, or in a message indicating that the secondary cell is exiting the dormant state.

42. The method according to claim 41, characterized in that, The first information includes one or more of the following: Indication information used to indicate the immediate triggering of the uplink reference signal; Used to indicate the target resource template identifier among a plurality of pre-configured uplink reference signal resource templates for transmitting the uplink reference signal; The transmission time of the uplink reference signal is offset relative to the time of the first information; The transmission time of the uplink reference signal is offset from the time of the feedback information corresponding to the first information; The priority information of the uplink reference signal and the CSI.

43. The method according to claim 41 or 42, characterized in that, The first information includes one or more of the following: Indication information used to indicate the immediate triggering of the downlink reference signal; Used to indicate the target resource set identifier in a pre-configured set of multiple downlink reference signal resource sets for transmitting the downlink reference signal; The time offset of the downlink reference signal relative to the first information; The time offset of the downlink reference signal relative to the feedback information corresponding to the first information; Instruction information used to instruct the immediate reporting of the CSI; Used to indicate the time offset between the CSI reporting time and the downlink reference signal; The identifier of the CSI report template; Uplink authorization information corresponding to the PUSCH used to carry the CSI.

44. The method according to any one of claims 41 to 43, characterized in that, The method further includes: The network device sends pre-configuration information to the terminal device, the pre-configuration information including one or more of the following: Resource templates used for transmitting the uplink reference signals; The resource set used for transmitting the downlink reference signal; Report template used for transmitting the CSI; The pre-configuration information is carried in SIB or RRC signaling.

45. The method according to claim 44, characterized in that, The resource template of the uplink reference signal includes one or more of the following: the duty cycle of the resource block or symbol, the candidate period, the power limit, and an indication of whether to compress the number of symbols; And / or, The resource set of the downlink reference signal includes a sparse port subset for measuring the downlink reference signal; And / or, The CSI report template includes CSI resources and / or CSI content, which includes PMI and CQI, or includes CQI but excludes PMI.

46. ​​The method according to any one of claims 41 to 45, characterized in that, The transmission time of the target signal satisfies one or more of the following: The interval between the first information and the first information is a predetermined time period; The interval between the feedback information corresponding to the first information is a predetermined time. The interval between the tracking reference signal (TRS) sent by the network device and the network device is a predetermined duration; It is equal to the end time of the TRS.

47. The method according to any one of claims 41 to 46, characterized in that, The transmission sequence of the target signal includes: The uplink reference signal, the downlink reference signal, and the CSI are transmitted sequentially; or... The uplink reference signal is transmitted before the secondary cell is activated or exits dormancy, and the downlink reference signal and the CSI are transmitted after the secondary cell is activated or exits dormancy; or... The uplink reference signal, the downlink reference signal, and the CSI are transmitted after the secondary cell is activated or exits its dormant state.

48. The method according to any one of claims 41 to 47, characterized in that, The uplink reference signal, the downlink reference signal, and the CSI are triggered by the first information; or... The uplink reference signal is triggered by the first information, and the downlink reference signal and the CSI are triggered by other messages after the first information, wherein the other messages include messages transmitted after the secondary cell is activated or exits the dormant state.

49. The method according to any one of claims 41 to 48, characterized in that, Messages used to indicate that a secondary cell is exiting a dormant state include one or more of the following DCI formats: DCI format 0_0, DCI format 0_1, DCI format 0_3, DCI format 1_0, DCI format 1_1, DCI format 1_3, and DCI format 2_6.

50. The method according to any one of claims 26 to 49, characterized in that, The downlink reference signal includes a zero-power channel state information reference signal (ZP CSI-RS) and a non-zero-power channel state information reference signal (NZP CSI-RS), wherein the resource elements (REs) occupied by the NZP CSI-RS are matched with the REs occupied by the ZP CSI-RS, which has a frequency domain density of 1 or 1 / 2; and / or, The downlink reference signals transmitted within the same cell include a first type of CSI-RS and a second type of CSI-RS, with different frequency domain densities for the first type of CSI-RS and the second type of CSI-RS.

51. A terminal device, characterized in that, include: A transceiver unit is used to receive first information sent by a network device, the first information being used to trigger the reception or transmission of a target signal, the target signal including one or more of the following: Upward reference signal; Downward reference signal; Channel State Information (CSI); Wherein, the first information is sent by the network device during uplink random access; or, the first information is sent by the network device during secondary cell activation or exit from dormancy.

52. The terminal device according to claim 51, characterized in that, The uplink reference signal includes a sounding reference signal (SRS) or a sounding reference signal (AS-SRS) for antenna selection; and / or, the downlink reference signal includes a channel state information reference signal (CSI-RS) or a synchronization signal broadcast channel block (SSB).

53. The terminal device according to claim 51 or 52, characterized in that, The target signal includes aperiodic signals or semi-persistent signals.

54. The terminal device according to any one of claims 51 to 53, characterized in that, The first information is carried in the last message of the uplink random access process.

55. The terminal device according to claim 54, characterized in that, The uplink reference signal, the downlink reference signal, and the CSI are triggered by the first information; and / or, The uplink reference signal and the downlink reference signal are triggered by the first information, and the CSI is triggered by other messages following the first information.

56. The terminal device according to claim 54 or 55, characterized in that, The last message includes a PDSCH, and the first information is carried in the MAC CE within the PDSCH; or... The last message includes a PDCCH, and the first information is carried in the PDCCH.

57. The terminal device according to any one of claims 54 to 56, characterized in that, The first information includes one or more of the following: Reference time; The transmission time of the target signal is offset relative to the reference time. Configuration information used to receive or send the target signal; Trigger status information, used to indicate whether the target signal has been triggered; Uplink authorization information corresponding to the PUSCH used to carry the CSI; The encoding rate scaling parameter used to carry the PUSCH of the CSI; The transmission order of uplink reference signal, downlink reference signal, and CSI.

58. The terminal device according to claim 57, characterized in that, The reference time is determined based on the following time: The time corresponding to the first information; or, The time corresponding to the feedback information of the first information; or... The first available time for uplink transmission after the first piece of information.

59. The terminal device according to any one of claims 54 to 58, characterized in that, The transceiver unit is also used for: The system receives second information sent by the network device, the second information including one or more configuration information for receiving or sending the target signal.

60. The terminal device according to claim 59, characterized in that, The second information is carried in the System Information Block (SIB); and / or, The second information is carried in the last message of the uplink random access process; and / or, The second information is carried in other downlink messages during the uplink random access process; and / or, The second information is carried in RRC signaling.

61. The terminal device according to claim 59 or 60, characterized in that, The second information is associated with one or more of the following capabilities: the ability to trigger the target signal based on the first information, radio frequency hardware capabilities, the maximum transmission bandwidth of the supported uplink reference signal, the maximum number of ports supported for the supported downlink reference signal, and the maximum transmission bandwidth of the supported downlink reference signal.

62. The terminal device according to any one of claims 59 to 61, characterized in that, The transceiver unit is also used for: Send third information to the network device; The third information is used to indicate whether the terminal device supports the configuration information indicated by the second information; The third information is used to indicate the configuration information supported by the terminal device among the multiple configuration information indicated by the second information; The third piece of information is used to indicate the capabilities supported by the terminal device.

63. The terminal device according to claim 62, characterized in that, The third information is carried in the third message during the uplink random access process, wherein, The reserved bits in the third message are used to carry the third information; or... The third piece of information is associated with the logical channel identifier in the third message.

64. The terminal device according to any one of claims 54 to 63, characterized in that, The transmission sequence of the target signal includes: The uplink reference signal, the downlink reference signal, and the CSI are transmitted sequentially; or... The downlink reference signal, the CSI, and the uplink reference signal are transmitted sequentially; or... The uplink reference signal is transmitted at at least one first time position within the detection window following the first information, the downlink reference signal is transmitted at at least one second time position within the detection window, and the CSI is transmitted at the first resource position available for uplink transmission after the downlink reference signal is completed.

65. The terminal device according to any one of claims 54 to 64, characterized in that, The last message in the uplink random access process includes DCI, where... The reserved bits in the DCI are used to carry the first information; or... The DCI includes newly added bits, which are used to carry the first information.

66. The terminal device according to any one of claims 51 to 53, characterized in that, The first information is carried in a message indicating that the secondary cell is activated, or in a message indicating that the secondary cell is exiting the dormant state.

67. The terminal device according to claim 66, characterized in that, The first information includes one or more of the following: Indication information used to indicate the immediate triggering of the uplink reference signal; Used to indicate the target resource template identifier among a plurality of pre-configured uplink reference signal resource templates for transmitting the uplink reference signal; The transmission time of the uplink reference signal is offset relative to the time of the first information; The transmission time of the uplink reference signal is offset from the time of the feedback information corresponding to the first information; The priority information of the uplink reference signal and the CSI.

68. The terminal device according to claim 66 or 67, characterized in that, The first information includes one or more of the following: Indication information used to indicate the immediate triggering of the downlink reference signal; Used to indicate the target resource set identifier in a pre-configured set of multiple downlink reference signal resource sets for transmitting the downlink reference signal; The time offset of the downlink reference signal relative to the first information; The time offset of the downlink reference signal relative to the feedback information corresponding to the first information; Instruction information used to instruct the immediate reporting of the CSI; Used to indicate the time offset between the CSI reporting time and the downlink reference signal; The identifier of the CSI report template; Uplink authorization information corresponding to the PUSCH used to carry the CSI.

69. The terminal device according to any one of claims 66 to 68, characterized in that, The transceiver unit is also used for: Receive pre-configuration information sent by the network device, wherein the pre-configuration information includes one or more of the following: Resource templates used for transmitting the uplink reference signals; The resource set used for transmitting the downlink reference signal; Report template used for transmitting the CSI; The pre-configuration information is carried in SIB or RRC signaling.

70. The terminal device according to claim 69, characterized in that, The resource template of the uplink reference signal includes one or more of the following: the duty cycle of the resource block or symbol, the candidate period, the power limit, and an indication of whether to compress the number of symbols; And / or, The resource set of the downlink reference signal includes a sparse port subset for measuring the downlink reference signal; And / or, The CSI report template includes CSI resources and / or CSI content, which includes PMI and CQI, or includes CQI but excludes PMI.

71. The terminal device according to any one of claims 66 to 70, characterized in that, The transmission time of the target signal satisfies one or more of the following: The interval between the first information and the first information is a predetermined time period; The interval between the feedback information corresponding to the first information is a predetermined time. The interval between the tracking reference signal (TRS) sent by the network device and the network device is a predetermined duration; It is equal to the end time of the TRS.

72. The terminal device according to any one of claims 66 to 71, characterized in that, The transmission sequence of the target signal includes: The uplink reference signal, the downlink reference signal, and the CSI are transmitted sequentially; or... The uplink reference signal is transmitted before the secondary cell is activated or exits dormancy, and the downlink reference signal and the CSI are transmitted after the secondary cell is activated or exits dormancy; or... The uplink reference signal, the downlink reference signal, and the CSI are transmitted after the secondary cell is activated or exits its dormant state.

73. The terminal device according to any one of claims 66 to 72, characterized in that, The uplink reference signal, the downlink reference signal, and the CSI are triggered by the first information; or... The uplink reference signal is triggered by the first information, and the downlink reference signal and the CSI are triggered by other messages after the first information, wherein the other messages include messages transmitted after the secondary cell is activated or exits the dormant state.

74. The terminal device according to any one of claims 66 to 73, characterized in that, Messages used to indicate that a secondary cell is exiting a dormant state include one or more of the following DCI formats: DCI format 0_0, DCI format 0_1, DCI format 0_3, DCI format 1_0, DCI format 1_1, DCI format 1_3, and DCI format 2_6.

75. The terminal device according to any one of claims 51 to 74, characterized in that, The downlink reference signal includes a zero-power channel state information reference signal (ZP CSI-RS) and a non-zero-power channel state information reference signal (NZP CSI-RS), wherein the resource elements (REs) occupied by the NZP CSI-RS are matched with the REs occupied by the ZP CSI-RS, which has a frequency domain density of 1 or 1 / 2; and / or, The downlink reference signals transmitted within the same cell include a first type of CSI-RS and a second type of CSI-RS, with different frequency domain densities for the first type of CSI-RS and the second type of CSI-RS.

76. A network device, characterized in that, include: A transceiver unit is used to send first information to a terminal device, the first information being used to trigger the reception or transmission of a target signal, the target signal including one or more of the following: Upward reference signal; Downward reference signal; Channel State Information (CSI); Wherein, the first information is sent by the network device during uplink random access; or, the first information is sent by the network device during secondary cell activation or exit from dormancy.

77. The network device according to claim 76, characterized in that, The uplink reference signal includes a sounding reference signal (SRS) or a sounding reference signal (AS-SRS) for antenna selection; and / or, the downlink reference signal includes a channel state information reference signal (CSI-RS) or a synchronization signal broadcast channel block (SSB).

78. The network device according to claim 76 or 77, characterized in that, The target signal includes aperiodic signals or semi-persistent signals.

79. The network device according to any one of claims 76 to 78, characterized in that, The first information is carried in the last message of the uplink random access process.

80. The network device according to claim 79, characterized in that, The uplink reference signal, the downlink reference signal, and the CSI are triggered by the first information; and / or, The uplink reference signal and the downlink reference signal are triggered by the first information, and the CSI is triggered by other messages following the first information.

81. The network device according to claim 79 or 80, characterized in that, The last message includes a PDSCH, and the first information is carried in the MAC CE within the PDSCH; or... The last message includes a PDCCH, and the first information is carried in the PDCCH.

82. The network device according to any one of claims 79 to 81, characterized in that, The first information includes one or more of the following: Reference time; The transmission time of the target signal is offset relative to the reference time. Configuration information used to receive or send the target signal; Trigger status information, used to indicate whether the target signal has been triggered; Uplink authorization information corresponding to the PUSCH used to carry the CSI; The encoding rate scaling parameter used to carry the PUSCH of the CSI; The transmission order of uplink reference signal, downlink reference signal, and CSI.

83. The network device according to claim 82, characterized in that, The reference time is determined based on the following time: The time corresponding to the first information; or, The time corresponding to the feedback information of the first information; or... The first available time for uplink transmission after the first piece of information.

84. The network device according to any one of claims 79 to 83, characterized in that, The transceiver unit is also used for: Send second information to the terminal device, the second information including one or more configuration information for receiving or sending the target signal.

85. The network device according to claim 84, characterized in that, The second information is carried in the System Information Block (SIB); and / or, The second information is carried in the last message of the uplink random access process; and / or, The second information is carried in other downlink messages during the uplink random access process; and / or, The second information is carried in RRC signaling.

86. The network device according to claim 84 or 85, characterized in that, The second information is associated with one or more of the following capabilities: the ability to trigger the target signal based on the first information, radio frequency hardware capabilities, the maximum transmission bandwidth of the supported uplink reference signal, the maximum number of ports supported for the supported downlink reference signal, and the maximum transmission bandwidth of the supported downlink reference signal.

87. The network device according to any one of claims 84 to 86, characterized in that, The transceiver unit is also used for: Receive third information sent by the terminal device; The third information is used to indicate whether the terminal device supports the configuration information indicated by the second information; The third information is used to indicate the configuration information supported by the terminal device among the multiple configuration information indicated by the second information; The third piece of information is used to indicate the capabilities supported by the terminal device.

88. The network device according to claim 87, characterized in that, The third information is carried in the third message during the uplink random access process, wherein, The reserved bits in the third message are used to carry the third information; or... The third piece of information is associated with the logical channel identifier in the third message.

89. The network device according to any one of claims 79 to 88, characterized in that, The transmission sequence of the target signal includes: The uplink reference signal, the downlink reference signal, and the CSI are transmitted sequentially; or... The downlink reference signal, the CSI, and the uplink reference signal are transmitted sequentially; or... The uplink reference signal is transmitted at at least one first time position within the detection window following the first information, the downlink reference signal is transmitted at at least one second time position within the detection window, and the CSI is transmitted at the first resource position available for uplink transmission after the downlink reference signal is completed.

90. The network device according to any one of claims 79 to 89, characterized in that, The last message in the uplink random access process includes DCI, where... The reserved bits in the DCI are used to carry the first information; or... The DCI includes newly added bits, which are used to carry the first information.

91. The network device according to any one of claims 76 to 78, characterized in that, The first information is carried in a message indicating that the secondary cell is activated, or in a message indicating that the secondary cell is exiting the dormant state.

92. The network device according to claim 91, characterized in that, The first information includes one or more of the following: Indication information used to indicate the immediate triggering of the uplink reference signal; Used to indicate the target resource template identifier among a plurality of pre-configured uplink reference signal resource templates for transmitting the uplink reference signal; The transmission time of the uplink reference signal is offset relative to the time of the first information; The transmission time of the uplink reference signal is offset from the time of the feedback information corresponding to the first information; The priority information of the uplink reference signal and the CSI.

93. The network device according to claim 91 or 92, characterized in that, The first information includes one or more of the following: Indication information used to indicate the immediate triggering of the downlink reference signal; Used to indicate the target resource set identifier in a pre-configured set of multiple downlink reference signal resource sets for transmitting the downlink reference signal; The time offset of the downlink reference signal relative to the first information; The time offset of the downlink reference signal relative to the feedback information corresponding to the first information; Instruction information used to instruct the immediate reporting of the CSI; Used to indicate the time offset between the CSI reporting time and the downlink reference signal; The identifier of the CSI report template; Uplink authorization information corresponding to the PUSCH used to carry the CSI.

94. The network device according to any one of claims 91 to 93, characterized in that, The transceiver unit is also used for: Send pre-configuration information to the terminal device, wherein the pre-configuration information includes one or more of the following: Resource templates used for transmitting the uplink reference signals; The resource set used for transmitting the downlink reference signal; Report template used for transmitting the CSI; The pre-configuration information is carried in SIB or RRC signaling.

95. The network device according to claim 94, characterized in that, The resource template of the uplink reference signal includes one or more of the following: the duty cycle of the resource block or symbol, the candidate period, the power limit, and an indication of whether to compress the number of symbols; And / or, The resource set of the downlink reference signal includes a sparse port subset for measuring the downlink reference signal; And / or, The CSI report template includes CSI resources and / or CSI content, which includes PMI and CQI, or includes CQI but excludes PMI.

96. The network device according to any one of claims 91 to 95, characterized in that, The transmission time of the target signal satisfies one or more of the following: The interval between the first information and the first information is a predetermined time period; The interval between the feedback information corresponding to the first information is a predetermined time. The interval between the tracking reference signal (TRS) sent by the network device and the network device is a predetermined duration; It is equal to the end time of the TRS.

97. The network device according to any one of claims 91 to 96, characterized in that, The transmission sequence of the target signal includes: The uplink reference signal, the downlink reference signal, and the CSI are transmitted sequentially; or... The uplink reference signal is transmitted before the secondary cell is activated or exits dormancy, and the downlink reference signal and the CSI are transmitted after the secondary cell is activated or exits dormancy; or... The uplink reference signal, the downlink reference signal, and the CSI are transmitted after the secondary cell is activated or exits its dormant state.

98. The network device according to any one of claims 91 to 97, characterized in that, The uplink reference signal, the downlink reference signal, and the CSI are triggered by the first information; or... The uplink reference signal is triggered by the first information, and the downlink reference signal and the CSI are triggered by other messages after the first information, wherein the other messages include messages transmitted after the secondary cell is activated or exits the dormant state.

99. The network device according to any one of claims 91 to 98, characterized in that, Messages used to indicate that a secondary cell is exiting a dormant state include one or more of the following DCI formats: DCI format 0_0, DCI format 0_1, DCI format 0_3, DCI format 1_0, DCI format 1_1, DCI format 1_3, and DCI format 2_6.

100. The network device according to any one of claims 76 to 99, characterized in that, The downlink reference signal includes a zero-power channel state information reference signal (ZP CSI-RS) and a non-zero-power channel state information reference signal (NZP CSI-RS), wherein the resource elements (REs) occupied by the NZP CSI-RS are matched with the REs occupied by the ZP CSI-RS, which has a frequency domain density of 1 or 1 / 2; and / or, The downlink reference signals transmitted within the same cell include a first type of CSI-RS and a second type of CSI-RS, with different frequency domain densities for the first type of CSI-RS and the second type of CSI-RS.

101. A terminal device, characterized in that, The device includes a transceiver, a memory, and a processor. The memory stores a program, and the processor invokes the program in the memory and controls the transceiver to receive or send signals so that the terminal device performs the method according to any one of claims 1 to 25.

102. A network device, characterized in that, The device includes a transceiver, a memory, and a processor. The memory stores a program, and the processor invokes the program in the memory and controls the transceiver to receive or transmit signals to cause the network device to perform the method according to any one of claims 26 to 50.

103. An apparatus, characterized in that, Includes a processor for calling a program from memory to cause the apparatus to perform the method according to any one of claims 1 to 50.

104. A chip, characterized in that, Includes a processor for calling a program from memory, causing a device on which the chip is mounted to perform the method according to any one of claims 1 to 50.

105. A computer-readable storage medium, characterized in that, It contains a program that causes a computer to perform the method according to any one of claims 1 to 50.

106. A computer program product, characterized in that, Includes a program that causes a computer to perform the method according to any one of claims 1 to 50.

107. A computer program, characterized in that, The computer program causes the computer to perform the method according to any one of claims 1 to 50.

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