Signal processing method and apparatus, and information sending method and apparatus

Abstract

Embodiments of the present application provide a signal processing method and apparatus, and an information sending method and apparatus. The signal processing apparatus comprises: a receiver, which receives transmission configuration indicator state (TCI state) related information sent by a network device for Layer 1 / Layer 2 triggered cell handover (LTM) configuration, the TCI state related information comprising TCI state indication information, or comprising TCI state indication information and TCI state activation information; and a processor, which tracks one or more TCI states activated by the TCI state activation information and / or a reference signal in a TCI state indicated by the TCI state indication information or a quasi co-location (QCL) source reference signal of the reference signal, or does not track the reference signal.

Description

Signal processing method, information sending method and device Technical Field

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

[0002] Mobility management is an essential mechanism in cellular mobile communication systems. It helps the new wireless NR system achieve load balancing, provide a better user experience, and improve overall system performance. When a terminal device moves from the coverage area of ​​one cell to the coverage area of ​​another cell, it needs to switch to the serving cell.

[0003] Currently, serving cell switching for terminal devices is triggered by Layer 3 measurements and achieved by reconfiguring the serving cell through Radio Resource Control (RRC) signaling. When RRC signaling reconfigures the serving cell, Layer 1 and Layer 2 operations of the communication system need to be reset, resulting in significant system latency, signaling load, and extended communication interruption. Therefore, a method has been proposed to trigger serving cell switching using Layer 1 measurement results and Layer 1 / Layer 2 signaling, effectively reducing system latency, signaling load, and communication interruption.

[0004] It should be noted that the above introduction to the technical background is merely intended to provide a clear and complete description of the technical solutions of this application and facilitate understanding by those skilled in the art. Simply because these solutions are described in the background technology section of this application, it should not be assumed that the above technical solutions are well known to those skilled in the art.

[0005] Summary of the Invention

[0006] In mobility management triggered by Layer 3 measurements, the sequence for switching a terminal device's serving cell is as follows: the network device sends configuration signaling to the terminal device, including measurements and reporting of neighboring candidate cells. The terminal device performs measurements based on the configuration signaling and reports the measurement results to the base station. After obtaining the measurement results, the network device selects a target cell to be switched to and sends a handover command to the terminal device. After receiving the handover command, the terminal device begins preparations for the handover, including, for example, adjusting the RF frequency and resetting the baseband processor. After completing the handover preparations, the terminal device begins downlink synchronization with the target cell and then sends an uplink random access signal to initiate uplink synchronization. After receiving the random access signal, the network device sends a response signal to the terminal device. After receiving the response signal, the terminal device completes the handover process and begins sending and receiving data in the new target cell. However, from the time the terminal device receives the handover command until the time the terminal device completes the handover process and begins sending and receiving data in the new target cell, communication with the terminal device is interrupted.

[0007] That is to say, in the mobility management triggered by layer 3 measurements, the time when the terminal device is in a communication interruption state includes the processing time for switching preparation after receiving the switching command, the time for downlink synchronization and the time for uplink synchronization. The communication interruption time is relatively long. Therefore, in the mobility management based on layer 1 / layer 2 triggering (L1 / L2 triggered mobility, LTM), in order to reduce the communication interruption time, it is possible to consider completing the relevant process of downlink synchronization of the target cell before the cell switching. To this end, the terminal device needs to continuously track the reference signal used for downlink synchronization. However, there is currently no discussion on how the terminal device tracks the reference signal used for downlink synchronization in the LTM process.

[0008] To address at least one of the above problems, embodiments of the present application provide a signal processing method, an information sending method, and an apparatus.

[0009] According to one aspect of an embodiment of the present application, a signal processing apparatus is provided, which is applied to a terminal device, and the apparatus includes:

[0010] a receiver configured to receive transmission configuration indication state (TCI state) related information for layer 1 / layer 2 triggered cell handover (LTM) configuration sent by a network device; the TCI state related information including TCI state indication information, or including TCI state indication information and TCI state activation information;

[0011] A processor that tracks a reference signal or a quasi-co-located (QCL) source reference signal of the reference signal in one or more TCI states activated by the TCI state activation information and / or a TCI state indicated by the TCI state indication information, or does not track a reference signal.

[0012] According to another aspect of an embodiment of the present application, there is provided an information sending device, applied to a network device, the device comprising:

[0013] A transmitter that sends TCI state-related information configured for layer 1 / layer 2 triggered cell switching (LTM) to a terminal device; the TCI state-related information includes TCI state indication information, or includes TCI state indication information and TCI state activation information; one or more TCI states activated by the TCI state activation information and / or the reference signal in the TCI state indicated by the TCI state indication information or the QCL source reference signal of the reference signal is tracked by the terminal device, or is not tracked.

[0014] According to another aspect of an embodiment of the present application, a communication system is provided, including a terminal device and / or a network device, wherein the terminal device includes the signal processing device described in the aforementioned first aspect, and the network device includes the information sending device described in the aforementioned other aspect.

[0015] One of the beneficial effects of the embodiments of the present application is that the terminal device tracks the reference signal according to the TCI status related information, or does not track the reference signal, thereby effectively completing the downlink synchronization of the target cell before the cell switching, thereby reducing the switching delay.

[0016] With reference to the following description and accompanying drawings, specific embodiments of the present application are disclosed in detail, indicating the manner in which the principles of the present application can be employed. It should be understood that the embodiments of the present application are not limited in scope. Within the spirit and scope of the appended claims, the embodiments of the present application include many variations, modifications and equivalents.

[0017] Features described and / or illustrated with respect to one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments.

[0018] It should be emphasized that the term "include / comprising" when used herein refers to the presence of features, integers, steps or components, but does not exclude the presence or addition of one or more other features, integers, steps or components. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The elements and features described in one figure or one embodiment of the present application can be combined with the elements and features shown in one or more other figures or embodiments. In addition, in the accompanying drawings, similar reference numerals represent corresponding parts in several figures and can be used to indicate corresponding parts used in more than one embodiment.

[0020] FIG1 is a schematic diagram of a communication system of the present application;

[0021] FIG2 is a schematic diagram of a signal processing method according to an embodiment of the present application;

[0022] FIG3 is a schematic diagram of an information sending method according to an embodiment of the present application;

[0023] FIG4 is a schematic diagram of an information sending device according to an embodiment of the present application;

[0024] FIG5 is a schematic diagram of a signal processing device according to an embodiment of the present application;

[0025] FIG6 is a schematic diagram of a network device according to an embodiment of the present application;

[0026] FIG7 is a schematic diagram of a terminal device according to an embodiment of the present application. DETAILED DESCRIPTION

[0027] The above and other features of the present application will become apparent through the following description with reference to the accompanying drawings. In the description and the accompanying drawings, specific embodiments of the present application are disclosed in detail, which illustrate some embodiments in which the principles of the present application can be adopted. It should be understood that the present application is not limited to the described embodiments. On the contrary, the present application includes all modifications, variations and equivalents that fall within the scope of the appended claims.

[0028] In the embodiments of the present application, the terms "first," "second," etc. are used to distinguish different elements in terms of title, but do not indicate the spatial arrangement or temporal order of these elements, and these elements should not be limited by these terms. The term "and / or" includes any one and all combinations of one or more of the associated listed terms. The terms "comprising," "including," "having," etc. refer to the presence of the stated features, elements, components, or components, but do not exclude the presence or addition of one or more other features, elements, components, or components.

[0029] In the embodiments of this application, the singular forms "a," "the," etc. include plural forms and should be broadly understood to mean "a" or "a type" rather than being limited to "one." Furthermore, the term "said" should be understood to include both singular and plural forms, unless the context clearly indicates otherwise. Furthermore, the term "according to" should be understood to mean "at least in part based on...", and the term "based on" should be understood to mean "at least in part based on...", unless the context clearly indicates otherwise.

[0030] In the embodiments of the present application, the term "communication network" or "wireless communication network" may refer to a network that complies with any of the following communication standards, such as Long Term Evolution (LTE), enhanced Long Term Evolution (LTE-A, LTE-Advanced), Wideband Code Division Multiple Access (WCDMA), High-Speed ​​Packet Access (HSPA), etc.

[0031] Furthermore, communication between devices in the communication system may be carried out according to communication protocols of any stage, for example, including but not limited to the following communication protocols: 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G and 5G, New Radio (NR), future 6G, etc., and / or other communication protocols currently known or to be developed in the future.

[0032] In the embodiments of the present application, the term "network device" refers to, for example, a device in a communication system that connects a terminal device to the communication network and provides services to the terminal device. Network devices may include, but are not limited to, the following devices: base station (BS), access point (AP), transmission reception point (TRP), broadcast transmitter, mobile management entity (MME), gateway, server, radio network controller (RNC), base station controller (BSC), etc.

[0033] Base stations may include, but are not limited to, NodeB (NB), evolved NodeB (eNodeB or eNB), and 5G base stations (gNB), among others. They may also include remote radio heads (RRHs), remote radio units (RRUs), relays, or low-power nodes (e.g., femeto, pico, etc.). The term "base station" may include some or all of their functions, and each base station may provide communication coverage for a specific geographic area. The term "cell" may refer to a base station and / or its coverage area, depending on the context in which the term is used.

[0034] In the embodiments of the present application, the term "user equipment" (UE) or "terminal equipment" (TE) refers to, for example, a device that accesses a communication network through a network device and receives network services. A terminal device can be fixed or mobile and may also be referred to as a mobile station (MS), a terminal, a subscriber station (SS), an access terminal (AT), a station, and so on.

[0035] Among them, terminal devices may include but are not limited to the following devices: cellular phones, personal digital assistants (PDAs), wireless modems, wireless communication devices, handheld devices, machine-type communication devices, laptop computers, cordless phones, smart phones, smart watches, digital cameras, etc.

[0036] For another example, in scenarios such as the Internet of Things (IoT), the terminal device can also be a machine or device for monitoring or measurement, including but not limited to: machine type communication (MTC) terminal, vehicle-mounted communication terminal, device-to-device (D2D) terminal, machine-to-machine (M2M) terminal, and so on.

[0037] In addition, the term "network side" or "network device side" refers to one side of the network, which can be a base station or one or more network devices as described above. The term "user side" or "terminal side" or "terminal device side" refers to the user or terminal side, which can be a UE or one or more terminal devices as described above. Unless otherwise specified herein, "device" can refer to either network equipment or terminal equipment.

[0038] In the following description, the terms "uplink control signal" and "uplink control information (UCI)" or "physical uplink control channel (PUCCH)" are interchangeable, and the terms "uplink data signal" and "uplink data information" or "physical uplink shared channel (PUSCH)" are interchangeable to avoid confusion.

[0039] The terms "downlink control signal" and "downlink control information (DCI)" or "physical downlink control channel (PDCCH)" are interchangeable, and the terms "downlink data signal" and "downlink data information" or "physical downlink shared channel (PDSCH)" are interchangeable.

[0040] In addition, sending or receiving PUSCH can be understood as sending or receiving uplink data carried by PUSCH, sending or receiving PUCCH can be understood as sending or receiving uplink information carried by PUCCH, and sending or receiving PRACH can be understood as sending or receiving preamble carried by PRACH; uplink signals can include uplink data signals and / or uplink control signals, etc., and can also be referred to as uplink transmission (UL transmission) or uplink information or uplink channels. Sending uplink transmission on uplink resources can be understood as sending the uplink transmission using the uplink resources. Similarly, downlink data / signals / channels / information can be understood accordingly.

[0041] In the embodiments of the present application, the high-layer signaling may be, for example, radio resource control (RRC) signaling; for example, an RRC message, including, for example, an MIB, system information, or a dedicated RRC message; or an RRC information element (RRC IE). The high-layer signaling may also be, for example, MAC (Medium Access Control) signaling; or a MAC control element (MAC CE). However, the present application is not limited thereto.

[0042] The following describes the scenarios of the embodiments of the present application through examples, but the present application is not limited thereto.

[0043] FIG1 is a schematic diagram of a communication system according to an embodiment of the present application, schematically illustrating a situation using a terminal device and a network device as an example. As shown in FIG1 , a communication system 100 may include a network device 101 and terminal devices 102 and 103. For simplicity, FIG1 illustrates only two terminal devices and one network device as an example, but the embodiments of the present application are not limited thereto.

[0044] In the embodiment of the present application, existing services or future services can be transmitted between the network device 101 and the terminal devices 102 and 103. For example, these services may include but are not limited to: enhanced mobile broadband (eMBB), massive machine type communication (mMTC), and ultra-reliable and low-latency communication (URLLC), etc.

[0045] The terminal device 102 may send data to the network device 101, for example, using an authorized or unauthorized transmission mode. The network device 101 may receive data sent by one or more terminal devices 102 and provide feedback to the terminal device 102, such as ACK / NACK information. The terminal device 102 may confirm the end of the transmission process, or may continue with new data transmission, or may retransmit the data based on the feedback information.

[0046] It is worth noting that FIG1 shows that both terminal devices 102 and 103 are within the coverage range of network device 101, but the present application is not limited thereto. Both terminal devices 102 and 103 may not be within the coverage range of network device 101, or one terminal device 102 may be within the coverage range of network device 101 while the other terminal device 103 is outside the coverage range of network device 101.

[0047] In the communication protocol stack, there are three layers: layer 1 includes the physical layer, layer 2 includes the radio link control RLC layer and the media access MAC layer, and layer 3 includes the RRC layer.

[0048] The following is a description with reference to the accompanying drawings and embodiments.

[0049] Embodiments of the first aspect

[0050] An embodiment of the present application provides a signal processing method, which is described from the perspective of a terminal device.

[0051] FIG2 is a schematic diagram of a signal processing method according to an embodiment of the present application. As shown in FIG2 , the method includes:

[0052] 201: The terminal device receives TCI state related information for Layer 1 / Layer 2 Triggered Cell Handover (LTM) configuration sent by a network device; the TCI state related information includes TCI state indication information, or includes TCI state indication information and TCI state activation information;

[0053] 202: The terminal device tracks the reference signal or the QCL source reference signal of the reference signal in one or more TCI states activated by the TCI state activation information and / or the TCI state indicated by the TCI state indication information, or does not track the reference signal.

[0054] It is worth noting that FIG2 above is merely a schematic illustration of an embodiment of the present application, and the present application is not limited thereto. For example, the execution order of the various operations may be appropriately adjusted, and other operations may be added or some operations may be reduced. Those skilled in the art may make appropriate modifications based on the above description, and are not limited to the description of FIG2 above.

[0055] Through the above embodiment, the terminal device tracks the reference signal according to the TCI status related information, or does not track the reference signal, thereby effectively completing the downlink synchronization of the target cell before the cell switching, thereby reducing the switching delay.

[0056] In some embodiments, layer 1 / layer 2 triggered mobility management, also known as layer 1 / layer 2 triggered cell switching, refers to switching of the serving cell through layer 1 / layer 2 signaling. The following description is given using the LTM process as an example, but the embodiments of the present application are not limited to this. The target cell below refers to the cell to be switched, and the reference signal can be replaced with a reference signal resource or a measurement resource. It should be noted that in the following embodiments, the name of the information field, the data type, and the value range are only for illustrative purposes, and the embodiments of the present application are not limited to this. The following examples are provided.

[0057] In some embodiments, a network device configures a reference signal for LTM. The method may further include: receiving first configuration information sent by the network device for configuring a reference signal for LTM, wherein the reference signal includes a synchronization signal block (SSB). In addition, tracking a CSI-RS reference signal (TRS) is optional. That is, the configured reference signal may include an SSB, or may include an SSB and a TRS. The SSB is used by a terminal device to measure the layer 1-reference signal receiving power (L1-RSRP) of an adjacent candidate cell. The terminal device can use the SSB to obtain coarse synchronization and then measure the reference signal to calculate the L1-RSRP; the TRS is used by the terminal device to perform fine synchronization tracking of the adjacent candidate cell in the time and frequency domain. The configured reference signal corresponds to the current serving cell and / or the adjacent candidate cell. In the first configuration information, cell indication information may be added to indicate which cell the reference signal corresponds to. For example, when the cell indication information value is 0, it indicates that the reference signal corresponds to the current serving cell. When it is not 0 but X, it indicates that the reference signal corresponds to adjacent candidate cell X. In addition, the first configuration information may also include a reference signal identifier (ID or index).

[0058] In some embodiments, when the configured reference signal is a TRS, the first configuration information of the TRS also includes a QCL source reference signal of the TRS.

[0059] In some embodiments, in order for the terminal device to perform uplink and downlink data transmission on the target cell as quickly as possible after completing the handover, the network device also configures a TCI state pool for the terminal device. The TCI state pool is used for the terminal device to measure and track the corresponding TCI state during the LTM process. The TCI state pool is configured for each cell and is carried by RRC signaling. Therefore, the method also includes: the terminal device receives the second configuration information sent by the network device for configuring the TCI state pool for LTM. The TCI state pool corresponds to the current serving cell and / or the adjacent candidate cell. The TCI state pool includes one or more TCI states, which are unified TCI states and may include a joint TCI state for uplink and downlink joint indication (one TCI state is used for uplink and downlink data transmission at the same time). Or a separate TCI state (separate TCI state), wherein the separate TCI state includes a downlink TCI state (DL TCI state) and / or an uplink TCI (UL TCI state) state, which is used to indicate uplink and downlink quasi co-location (QCL) parameters respectively.

[0060] In some embodiments, a TCI state includes two reference signals, where the second reference signal is optional. For the TCI state configured for the LTM process, at least one reference signal in the TCI state in the TCI state pool is a TRS or SSB. That is, at least one reference signal in the DL TCI state or the Joint TCI state in the TCI state pool is a TRS or SSB. Tracking a reference signal in a TCI state, as described below, refers to tracking a reference signal in the Joint TCI state or the DL TCI state. The QCL type of the TRS is configured as Type A, and the QCL type of the SSB is configured as Type C.

[0061] In some embodiments, when the first configuration information includes TRS configuration, the TCI state pool configured by the second configuration information may include only TCI states in which at least one reference signal is TRS, or include both TCI states in which at least one reference signal is SSB and TRS, or include only TCI states in which at least one reference signal is SSB. Conversely, when the terminal device is not configured with TRS, the TCI state pool only includes TCI states in which at least one reference signal is SSB.

[0062] In some embodiments, for the LTM process, the reference signal configured by the first configuration information and the TCI state pool configured by the second configuration information need to meet the following restrictions: when the first configuration information includes the configuration of TRS, at least one reference signal in the TCI state in the TCI state pool configured by the second configuration information is TRS; or the terminal device expects that at least one reference signal in the TCI state in the TCI state pool is TRS. That is, when the network device configures the reference signal of TRS, when the network device configures the TCI state pool, at least one reference signal in the TCI state in the pool is TRS. In other words, when the network device configures the TRS reference signal, the terminal device expects that at least one reference signal in the TCI state in the TCI state pool configured by the network device is TRS. In addition, the first configuration information and / or the second configuration information can be carried by RRC signaling, but the embodiments of the present application are not limited to this.

[0063] In some embodiments, when the number of TCI states in the TCI state pool is large, from the perspective of the complexity and power consumption of the terminal device, the network device may also send TCI state activation information for the terminal device to activate one or more TCI states in the TCI state pool. The TCI state activation information is configured for each cell (per cell) and is carried by MAC CE signaling. Among the activated TCI states, at least one reference signal is TRS or SSB.

[0064] In some embodiments, for the LTM process, the reference signal configured by the first configuration information and the TCI state activated by the TCI state activation information need to meet the following restrictions: when the first configuration information includes the configuration of TRS, at least one reference signal in the activated TCI state is TRS; or the terminal device expects that at least one reference signal in the activated TCI state is TRS. In other words, when the network device is configured with TRS, at least one reference signal in the activated TCI state is TRS. In other words, the terminal device expects that at least one reference signal in the TCI state activated by the network device is TRS.

[0065] In some embodiments, the network device may further send TCI state indication information to the terminal device, indicating the TCI state to be used for uplink and downlink transmission by the terminal device after receiving the cell switch command. The TCI state indicated by the TCI state indication information is included in a configured TCI state pool or is one of the activated TCI states. At least one reference signal in the TCI state indicated by the TCI state indication information is a TRS or SSB. The TCI state indication information is included in the cell switch command and is carried by the MAC CE.

[0066] In some embodiments, the TCI status indication information is mandatory and the TCI status activation information is optional, that is, the network device may not send the TCI status activation information and only send the TCI status indication information in the cell switching command, or the network device may send the TCI status activation information after configuring the TCI status pool and send the TCI status indication information in the cell switching command.

[0067] The inventors have found that since TRS can be used for fine synchronization, its implementation algorithm is more complex than that of coarse synchronization based on SSB. Therefore, it requires higher complexity and power consumption for the terminal device to track multiple TRSs. At this time, the terminal device may track TRS or not according to its capabilities. However, since TRS can obtain fine synchronization, thereby improving the performance of the system, fine synchronization information is required at least when the terminal device is sending and receiving data in the target cell. Therefore, the method may also include: the terminal device sends information on capabilities related to layer 1 / layer 2 triggered cell switching (LTM) to the network device, and the capabilities at least include whether it supports (is capable of) tracking TRS during the LTM process. Furthermore, the timing of whether TRS tracking is supported can be limited, that is, the capabilities at least include whether it supports (is capable of) tracking TRS before receiving a cell switching command or completing a cell switching. In other words, tracking TRS before receiving the cell switching command is not supported, which means that before receiving the cell switching command, the terminal device only tracks SSB and performs coarse synchronization on the adjacent candidate cells. After receiving the cell switching command (i.e., from the time the cell switching command is received to the time the cell switching is completed and from the time the cell switching is completed to the time the new TCI state activation information is received in the target cell), TRS is tracked again to perform fine synchronization on the adjacent candidate cells or target cells. Tracking TRS before completing the cell switching is not supported, which means that before completing the cell switching, the terminal device only tracks SSB and performs coarse synchronization on the adjacent candidate cells. After completing the cell switching (i.e., from the time the cell switching is completed to the time the new TCI state activation information is received in the target cell), TRS is tracked again to perform fine synchronization on the adjacent candidate cells or target cells. Tracking TRS before receiving the cell switching command is supported, which means that the terminal device can also track TRS before receiving the cell switching command. Tracking TRS before completing the cell switching is supported, which means that the terminal device can also track TRS before completing the cell switching.

[0068] In some embodiments, receiving a cell switching command means that the terminal device receives the cell switching command, correctly decodes the command, and is able to apply the information contained therein. Completing a cell switching means that the terminal device performs a cell switching and successfully completes the transmission of the first uplink data in the target cell. Receiving new TCI state activation information means that the received TCI state can be applied. Before receiving the cell switching command can also be replaced with before the cell switching command or before the cell switching (before the cell switch command), after receiving the cell switching command to completing the cell switching can also be replaced with during the cell switching process or during the execution of the cell switching command (during the cell switch command), after completing the cell switching to before the target cell receives the new TCI state activation information can also be replaced with after the cell switch command is completed (after the cell switch command, or after the cell switch command until a TCI state activation MAC CE is received).

[0069] In some embodiments, in the LTM process, in order to reduce the delay of switching, the downlink synchronization of the target cell needs to be completed in advance before the cell switching. For this purpose, the terminal device needs to continuously track the reference signal (SSB or TRS) used for downlink synchronization. Downlink synchronization refers to the process in which the terminal device determines the frame boundary / frame header in the time domain of the downlink signal of a certain cell or the downlink beam of the cell from the received downlink signal. Tracking the reference signal for downlink synchronization includes measuring the reference signal, using the reference signal to estimate the downlink signal timing, the time expansion of the channel, the frequency deviation, the Doppler shift of the channel and other time-frequency synchronization information, and synchronization information maintenance (maintenance refers to continuous storage and updating).

[0070] In an embodiment of the present application, the inventor proposes that the behavior of the terminal device in tracking the reference signal is at least related to the relevant configuration of the network, such as the activation / indication of the TCI status (TCI status activation information and / or TCI status indication information). Optionally, the configuration of the reference signal (first configuration information), the configuration of the TCI status pool (second configuration information), etc. can also be considered. Optionally, it is also related to the above-mentioned capabilities of the terminal itself (whether TRS tracking is supported, that is, whether fine synchronization is supported). The following describes in detail the tracking behavior of the terminal device in tracking the reference signal under different configurations of the network device and different capabilities of the terminal device.

[0071] In some embodiments, the reference signal tracked by the terminal device may be a TRS or an SSB. The SSB may be a reference signal in a TCI state activated by (TCI state activation information), or a QCL source reference signal of a reference signal in an activated TCI state, or a reference signal in a TCI state indicated by (TCI state indication information in a cell handover command); or a QCL source reference signal of a reference signal in an indicated TCI state. The TRS may be a reference signal in an activated TCI state; or a reference signal in an indicated TCI state.

[0072] In some embodiments, different configurations include whether the terminal device is configured with TRS (first configuration information) (or the first configuration information includes the configuration of TRS), or is not configured with TRS (or the first configuration information does not include the configuration of TRS), and / or the network device sends TCI state activation information or does not send TCI state activation information, and / or whether the TCI state pool configured by (second configuration information) contains at least one reference signal that is one or more TCI states of TRS or SSB, etc. Different capabilities include whether the terminal device supports tracking TRS or does not support tracking TRS, or supports tracking TRS before receiving a cell switching command or completing a cell switching, and does not support tracking TRS before receiving a cell switching command or completing a cell switching. The following combines the above-mentioned different configurations and different capabilities to illustrate which type of reference signal is tracked in different situations.

[0073] (1) No TCI state is activated before receiving the cell handover command

[0074] In some embodiments, during the LTM process, the network device does not send TCI state activation information to activate the TCI state before sending the cell switching command, and only indicates the TCI state through TCI state indication information in the cell switching command. In this case, no reference signal is tracked before receiving the cell switching command. In addition, considering the capabilities of the terminal device, if the terminal device supports TRS tracking, the terminal device tracks the reference signal in the TCI state indicated in the cell switching command; if the terminal device does not support TRS tracking, the terminal device tracks the reference signal in the TCI state indicated in the cell switching command or the QCL source reference signal of the reference signal.

[0075] In some embodiments, the time point of the terminal device's capability is further considered. If the time point of whether the terminal device supports tracking TRS is before receiving the cell switching command (regardless of whether it supports tracking TRS), then,

[0076] Before receiving the cell switching command, the terminal device does not track any reference signal; after receiving the cell switching command and before the new TCI state activation information is received in the target cell (including after receiving the cell switching command and before completing the cell switching, and after completing the cell switching and before the new TCI state activation information is received in the target cell), the terminal device tracks the reference signal in the TCI state indicated in the cell switching command.

[0077] In some embodiments, the time point of the terminal device's capability is further considered. If the time point of whether the terminal device supports tracking TRS is before completing cell switching, then,

[0078] Before receiving the cell switching command, the terminal device does not track any reference signal; after receiving the cell command and before completing the cell switching, if the terminal device supports tracking of TRS before completing the cell switching, the terminal device tracks the reference signal in the TCI state indicated in the cell switching command; if the terminal device does not support tracking of TRS before completing the cell switching, when the reference signal of the TCI state indicated in the cell switching command is TRS, the terminal device tracks the QCL source reference signal of the TRS; when the reference signal in the TCI state in the cell switching command is SSB, the terminal device tracks the SSB; after the terminal device completes the switching and before the new TCI state activation information is received in the target cell, the terminal device tracks the reference signal in the TCI state in the cell switching command.

[0079] In some embodiments, after the target cell receives new TCI state activation information, the terminal device continues to track the reference signal of the adjacent candidate cell, where the reference signal comes from one or more TCI states activated by the TCI state activation information (the original TCI state activation information received in 201) and / or the reference signal in the TCI state indicated by the TCI state indication information or the quasi-co-site (QCL) source reference signal of the reference signal, or no longer tracks the reference signal, or tracks a part of the reference signal.

[0080] (2) The TCI state is activated before receiving the cell handover command, and the terminal device is not configured with TRS (first configuration information)

[0081] In some embodiments, during the LTM process, the network device sends TCI state activation information to activate the TCI state before sending the cell switching command. The terminal device is not configured with TRS, and at least one reference signal in the TCI state pool is one or more TCI states of SSB, which are activated before receiving the cell switching command. In this case, the terminal device tracks the SSB in the activated TCI state (until new TCI state activation information is received in the target cell), and / or tracks the reference signal in the TCI state indicated in the cell switching command (until new TCI state activation information is received in the target cell). In this case, regardless of whether the time point of tracking TRS in the terminal device's capability is before receiving the cell switching command or before completing the cell switching, the behavior of the terminal device is the same.

[0082] The following example illustrates this.

[0083] For example, if the terminal device supports (has the ability to) track TRS before receiving a cell switching command, if at least one reference signal in the TCI state pool is one or more TCI states of SSB, which are activated before receiving the cell switching command, then the terminal device tracks the SSB in the activated TCI state before receiving the cell switching command, during the execution of the cell switching command, and after the switching is completed; if the terminal device does not support (has no ability to) track TRS before receiving a cell switching command, if at least one reference signal in the TCI state pool is one or more TCI states of SSB, which are activated before receiving the cell switching command, then the terminal device tracks the SSB in the activated TCI state before receiving the cell switching command, during the execution of the cell switching command, and after the switching is completed.

[0084] For example, if the terminal device supports (is capable of) tracking TRS before completing the cell switching, if at least one reference signal in the TCI state pool is one or more TCI states of SSB, which are activated before receiving the cell switching command, then the terminal device tracks the SSB in the activated TCI state before receiving the cell switching command, during the execution of the cell switching command, and after the switching is completed; if the terminal device does not support (is not capable of) tracking TRS before completing the cell switching, if at least one reference signal in the TCI state pool is one or more TCI states of SSB, which are activated before receiving the cell switching command, then the terminal device tracks the SSB in the activated TCI state before receiving the cell switching command, during the execution of the cell switching command, and after the switching is completed.

[0085] In some embodiments, after the target cell receives new TCI state activation information, the terminal device continues to track the reference signal of the adjacent candidate cell, where the reference signal comes from one or more TCI states activated by the TCI state activation information (the original TCI state activation information received in 201) and / or the reference signal in the TCI state indicated by the TCI state indication information or the quasi-co-site (QCL) source reference signal of the reference signal, or no longer tracks the reference signal, or tracks a part of the reference signal.

[0086] (3) The TCI state is activated before receiving the cell handover command, and the terminal device is configured with TRS (first configuration information)

[0087] In some embodiments, during the LTM process, the network device sends TCI state activation information to activate the TCI state before sending a cell switching command. The terminal device is configured with TRS, and at least one reference signal is one or more TCI states of SSB, which are activated before receiving the cell switching command. The terminal device tracks the SSB in the activated TCI state, and / or tracks the reference signal in the TCI state indicated in the cell switching command or the QCL source reference signal of the reference signal; or the terminal device is configured with TRS, and at least one reference signal is one or more TCI states of TRS, which are activated before receiving the cell switching command. is activated, and the terminal device does not support tracking of TRS, the terminal device tracks the TRS in the activated TCI state or the QCL source reference signal of the TRS, and / or tracks the reference signal in the TCI state indicated in the cell switching command or the QCL source reference signal of the reference signal; or, the terminal device is configured with TRS, and at least one reference signal is one or more TCI states of TRS, and is activated before receiving the cell switching command, and the terminal device supports tracking of TRS, the terminal device tracks the TRS in the activated TCI state, and / or tracks the reference signal in the TCI state indicated in the cell switching command.

[0088] In some embodiments, the time point at which the terminal device's capabilities are further considered:

[0089] (i) The terminal device supports tracking TRS before receiving a cell handover command

[0090] In some embodiments, at least one reference signal is one or more TCI states of a TRS, which are activated before receiving a cell handover command, and the terminal device tracks the TRS in the activated TCI state, and / or tracks the reference signal in the TCI state indicated in the cell handover command until new TCI state activation information is received in the target cell. That is, in a case where at least one reference signal is one or more TCI states of a TRS, which are activated before receiving a cell handover command, the terminal device tracks the TRS in the activated TCI state, and / or tracks the reference signal in the TCI state indicated in the cell handover command until new TCI state activation information is received in the target cell.

[0091] For example, before receiving a cell handover command, the terminal device tracks the TRS in one or more activated TCI states;

[0092] After receiving the cell switching command and before completing the cell switching, the terminal device tracks the TRS in one or more activated TCI states, and / or tracks the reference signal in the TCI state indicated in the cell switching command (if the reference signal in the TCI state is TRS, then track the TRS; if it is SSB, then track the SSB).

[0093] After completing the cell switching and before receiving new TCI state activation information in the target cell, the terminal device tracks the reference signal TRS in one or more activated TCI states, and / or tracks the reference signal in the TCI state indicated in the cell switching command (if the reference signal in the TCI state is TRS, then track the TRS; if it is SSB, then track the SSB).

[0094] In some embodiments, at least one reference signal is one or more TCI states of an SSB, which are activated before receiving a cell handover command, and the terminal device tracks the SSB in the activated TCI state and / or tracks the reference signal in the TCI state indicated in the cell handover command until new TCI state activation information is received in the target cell. That is, in a case where at least one reference signal is one or more TCI states of an SSB, which are activated before receiving a cell handover command, the terminal device tracks the SSB in the activated TCI state and / or tracks the reference signal in the TCI state indicated in the cell handover command until new TCI state activation information is received in the target cell.

[0095] For example, before receiving the cell handover command, the terminal device tracks the reference signal SSB in one or more activated TCI states;

[0096] After receiving the cell switching command and before completing the cell switching, the terminal device tracks the reference signal SSB in one or more activated TCI states, and / or tracks the reference signal in the TCI state indicated in the cell switching command (if the reference signal in the TCI state is TRS, then track the TRS; if it is SSB, then track the SSB).

[0097] After the handover is completed and before new TCI state activation information is received in the target cell, the terminal device tracks the reference signal SSB in one or more activated TCI states, and / or tracks the reference signal in the TCI state indicated in the cell handover command (if the TCI state reference signal is TRS, then track the TRS; if it is SSB, then track the SSB).

[0098] (ii) The terminal device does not support tracking TRS before receiving a cell handover command

[0099] In some embodiments, at least one of the reference signals is one or more TCI states of a TRS, which is activated before receiving a cell switching command, and the terminal device tracks the QCL source reference signal of the TRS in the activated TCI state before receiving the cell switching command, and tracks the TRS in the activated TCI state and / or tracks the reference signal in the TCI state indicated in the cell switching command after receiving the cell switching command until new TCI state activation information is received in the target cell. That is, in the case where at least one of the reference signals is one or more TCI states of a TRS, which is activated before receiving a cell switching command, the terminal device tracks the QCL source reference signal of the TRS in the activated TCI state before receiving the cell switching command, and tracks the TRS in the activated TCI state and / or tracks the reference signal in the TCI state indicated in the cell switching command after receiving the cell switching command until new TCI state activation information is received in the target cell.

[0100] For example, before receiving the cell handover command, the terminal device tracks the QCL source reference signal (SSB) of the reference signal TRS in one or more activated TCI states;

[0101] After receiving the cell switching command and before completing the cell switching, the terminal device tracks the reference signal TRS in one or more activated TCI states, and / or tracks the reference signal in the TCI state indicated in the cell switching command (if the reference signal in the TCI state is TRS, the terminal tracks the TRS; if it is SSB, it tracks the SSB).

[0102] After the handover is completed and before new TCI state activation information is received in the target cell, the terminal device tracks the reference signal TRS in one or more activated TCI states, and / or tracks the reference signal in the TCI state indicated in the cell handover command (if the reference signal in the TCI state is TRS, the terminal tracks the TRS; if it is SSB, it tracks the SSB).

[0103] In some embodiments, at least one reference signal is one or more TCI states of an SSB, which are activated before receiving a cell handover command, and the terminal device tracks the SSB in the activated TCI state and / or tracks the reference signal in the TCI state indicated in the cell handover command until new TCI state activation information is received in the target cell. That is, in a case where at least one reference signal is one or more TCI states of an SSB, which are activated before receiving a cell handover command, the terminal device tracks the SSB in the activated TCI state and / or tracks the reference signal in the TCI state indicated in the cell handover command until new TCI state activation information is received in the target cell.

[0104] For example, before receiving the cell handover command, the terminal device tracks the reference signal SSB in one or more activated TCI states;

[0105] After receiving the cell switching command and before completing the cell switching, the terminal device tracks the reference signal SSB in one or more activated TCI states, and / or tracks the reference signal in the TCI state indicated in the cell switching command (if the reference signal in the TCI state is TRS, the terminal tracks the TRS, if it is SSB, it tracks the SSB).

[0106] After the handover is completed and before new TCI state activation information is received in the target cell, the terminal device tracks the reference signal SSB in one or more activated TCI states, and / or tracks the reference signal in the TCI state indicated in the cell handover command (if the reference signal in the TCI state is TRS, the terminal tracks the TRS; if it is SSB, it tracks the SSB).

[0107] (iii) The terminal device supports tracking TRS before completing cell switching

[0108] In some embodiments, at least one reference signal is one or more TCI states of a TRS, which are activated before a cell handover command is received, and the terminal device tracks the TRS in the activated TCI state and / or tracks the reference signal in the TCI state indicated in the cell handover command until new TCI state activation information is received in the target cell. That is, in a case where at least one reference signal is one or more TCI states of a TRS, which are activated before a cell handover command is received, the terminal device tracks the TRS in the activated TCI state and / or tracks the reference signal in the TCI state indicated in the cell handover command until new TCI state activation information is received in the target cell.

[0109] For example, before receiving the cell handover command, the terminal device tracks the reference signal TRS in one or more activated TCI states;

[0110] After receiving the cell switching command and before completing the cell switching, the terminal device tracks the reference signal TRS in one or more activated TCI states, and / or tracks the reference signal in the TCI state indicated in the cell switching command (if the reference signal in the TCI state is TRS, the terminal tracks the TRS; if it is SSB, it tracks the SSB).

[0111] After the handover is completed and before new TCI state activation information is received in the target cell, the terminal device tracks the reference signal TRS in one or more activated TCI states, and / or tracks the reference signal in the TCI state indicated in the cell handover command (if the reference signal in the TCI state is TRS, then the TRS is tracked; if it is SSB, then the SSB is tracked).

[0112] In some embodiments, at least one reference signal is one or more TCI states of an SSB, which are activated before receiving a cell handover command, and the terminal device tracks the SSB in the activated TCI state and / or tracks the reference signal in the TCI state indicated in the cell handover command until new TCI state activation information is received in the target cell. That is, in a case where at least one reference signal is one or more TCI states of an SSB, which are activated before receiving a cell handover command, the terminal device tracks the SSB in the activated TCI state and / or tracks the reference signal in the TCI state indicated in the cell handover command until new TCI state activation information is received in the target cell.

[0113] For example, before receiving the cell handover command, the terminal device tracks the reference signal SSB in one or more activated TCI states;

[0114] After receiving the cell switching command and before completing the cell switching, the terminal device tracks the reference signal SSB in one or more activated TCI states, and / or tracks the reference signal in the TCI state indicated in the cell switching command (if the reference signal in the TCI state is TRS, then track the TRS; if it is SSB, then track the SSB).

[0115] After the handover is completed and before new TCI state activation information is received in the target cell, the terminal device tracks the reference signal SSB in one or more activated TCI states, and / or tracks the reference signal in the TCI state indicated in the cell handover command (if the reference signal in the TCI state is TRS, then the TRS is tracked; if it is SSB, then the SSB is tracked).

[0116] (iv) The terminal device does not support tracking TRS before completing cell switching

[0117] In some embodiments, at least one of the reference signals is one or more TCI states of a TRS, which is activated before receiving a cell switching command, and the terminal device tracks the QCL source reference signal of the TRS in the activated TCI state before completing the cell switching, and tracks the TRS in the activated TCI state after completing the switching until new TCI state activation information is received in the target cell, and / or tracks the reference signal in the TCI state indicated in the cell switching command or the QCL source reference signal of the reference signal. That is, in the case where at least one of the reference signals is one or more TCI states of a TRS, which is activated before receiving a cell switching command, the terminal device tracks the QCL source reference signal of the TRS in the activated TCI state before completing the cell switching, and tracks the TRS in the activated TCI state after completing the switching until new TCI state activation information is received in the target cell, and / or tracks the reference signal in the TCI state indicated in the cell switching command or the QCL source reference signal of the reference signal.

[0118] For example, before receiving the cell handover command, the terminal device tracks the QCL source reference signal of the reference signal TRS in one or more activated TCI states;

[0119] After receiving the cell switching command and before completing the cell switching, the terminal device tracks the QCL source reference signal of the reference signal TRS in one or more activated TCI states, and / or, if the reference signal of the TCI state in the cell switching command is TRS, the terminal device tracks the QCL source reference signal of the TRS, and if it is SSB, the terminal tracks the SSB.

[0120] After the handover is completed and before new TCI state activation information is received in the target cell, the terminal device tracks the reference signal TRS in one or more activated TCI states, and / or tracks the reference signal in the TCI state indicated in the cell handover command (if the reference signal in the TCI state is TRS, then the TRS is tracked; if it is SSB, then the SSB is tracked).

[0121] In some embodiments, at least one of the reference signals is one or more TCI states of an SSB, which is activated before receiving a cell handover command, and the terminal device tracks the SSB in the activated TCI state, and / or tracks the reference signal in the TCI state indicated in the cell handover command or the QCL source reference signal of the reference signal until new TCI state activation information is received in the target cell. That is, in the case where at least one of the reference signals is one or more TCI states of an SSB, which is activated before receiving a cell handover command, the terminal device tracks the SSB in the activated TCI state, and / or tracks the reference signal in the TCI state indicated in the cell handover command or the QCL source reference signal of the reference signal until new TCI state activation information is received in the target cell.

[0122] For example, before receiving the cell handover command, the terminal device tracks the reference signal SSB in one or more activated TCI states;

[0123] After receiving the cell switching command and before completing the cell switching, the terminal device tracks the reference signal SSB in one or more activated TCI states, and / or, if the reference signal in the TCI state in the cell switching command is TRS, tracks the QCL source reference signal of the TRS, and if it is SSB, tracks the SSB.

[0124] After the handover is completed and before new TCI state activation information is received in the target cell, the terminal device tracks the reference signal SSB in one or more activated TCI states, or tracks the reference signal in the TCI state indicated in the cell handover command (if the TCI state reference signal is TRS, then track the TRS; if it is SSB, then track the SSB).

[0125] The following example illustrates this.

[0126] For example, if the terminal device supports (has the ability to) track TRS before receiving a cell handover command, then,

[0127] If at least one reference signal in the TCI state pool is one or more TCI states of TRS and is activated before receiving the cell switching command, the terminal device tracks the TRS in the activated TCI state before receiving the cell switching command, during the execution of the cell switching command, and after the switching is completed; if at least one reference signal in the TCI state pool is one or more TCI states of SSB and is activated before receiving the cell switching command, the terminal device tracks the SSB in the activated TCI state before receiving the cell switching command, during the execution of the cell switching command, and after the switching is completed.

[0128] For example, if the terminal device supports (has the ability to) track TRS before completing cell switching, then,

[0129] If at least one reference signal in the TCI state pool is one or more TCI states of TRS and is activated before receiving the cell switching command, the terminal device tracks the TRS in the activated TCI state before receiving the cell switching command, during the execution of the cell switching command, and after the switching is completed; if at least one reference signal in the TCI state pool is one or more TCI states of SSB and is activated before receiving the cell switching command, the terminal device tracks the SSB in the activated TCI state before receiving the cell switching command, during the execution of the cell switching command, and after the switching is completed.

[0130] For example, if the terminal device does not support (has no capability to) track TRS before receiving a cell handover command, then,

[0131] If at least one of the reference signals in the TCI state pool is one or more TCI states of TRS and is activated before receiving the cell switching command, the terminal device tracks the SSB (QCL source reference signal of TRS in the activated TCI state) before receiving the cell switching command, and tracks the TRS during the execution of the cell switching command and after the cell switching is completed; if at least one of the reference signals in the TCI state pool is one or more TCI states of SSB and is activated before receiving the cell switching command, the terminal device tracks the SSB in the activated TCI state before receiving the cell switching command, during the execution of the cell switching command, and after the cell switching is completed.

[0132] For example, if the terminal device does not support (has no capability to) track TRS before completing cell switching, then,

[0133] If at least one of the reference signals in the TCI state pool is one or more TCI states of TRS and is activated before receiving the cell switching command, the terminal device tracks the SSB (QCL source reference signal of TRS in the activated TCI state) before receiving the cell switching command and during the execution of the cell switching command, and tracks the TRS after the cell switching is completed; if at least one of the reference signals in the TCI state pool is one or more TCI states of SSB and is activated before receiving the cell switching command, the terminal device tracks the SSB in the activated TCI state before receiving the cell switching command, during the execution of the cell switching command, and after the cell switching is completed.

[0134] In some embodiments, after the target cell receives new TCI state activation information, the terminal device continues to track the reference signal of the adjacent candidate cell, where the reference signal comes from one or more TCI states activated by the TCI state activation information (the original TCI state activation information received in 201) and / or the reference signal in the TCI state indicated by the TCI state indication information or the quasi-co-site (QCL) source reference signal of the reference signal, or no longer tracks the reference signal, or tracks a part of the reference signal.

[0135] Through the above embodiments, the terminal device can optionally track the reference signal based on the TCI status related information or not based on the terminal device's capabilities, thereby effectively completing the downlink synchronization of the target cell before the cell switching, thereby reducing the switching delay.

[0136] Embodiments of the second aspect

[0137] An embodiment of the present application provides an information sending method, which is explained from the perspective of a network device, and the contents that are the same as those in the embodiment of the first aspect will not be repeated.

[0138] FIG3 is a schematic diagram of a method for sending information according to an embodiment of the present application. As shown in FIG3 , the method includes:

[0139] 301: The network device sends TCI state-related information configured for layer 1 / layer 2 triggered cell switching (LTM) to the terminal device; the TCI state-related information includes TCI state indication information, or includes TCI state indication information and TCI state activation information; one or more TCI states activated by the TCI state activation information and / or the reference signal in the TCI state indicated by the TCI state indication information or the QCL source reference signal of the reference signal is tracked by the terminal device, or is not tracked.

[0140] It is worth noting that FIG3 above is merely a schematic illustration of an embodiment of the present application, and the present application is not limited thereto. For example, the execution order of the various operations may be appropriately adjusted, and other operations may be added or some operations may be reduced. Those skilled in the art may make appropriate modifications based on the above description, and are not limited to the description of FIG3 above.

[0141] In some embodiments, the implementation of 301 corresponds to 201-202. For the implementation of various information, please refer to the embodiment of the first aspect and will not be repeated here.

[0142] The above embodiments are merely exemplary of the present invention, but the present invention is not limited thereto. Appropriate modifications may be made based on the above embodiments. For example, the above embodiments may be used alone, or one or more of the above embodiments may be combined.

[0143] Through the above embodiments, the terminal device can optionally track the reference signal based on the TCI status related information or not based on the terminal device's capabilities, thereby effectively completing the downlink synchronization of the target cell before the cell switching, thereby reducing the switching delay.

[0144] Embodiments of the third aspect

[0145] The embodiment of the present application provides an information sending device, which may be, for example, a network device, or one or more components or assemblies configured on the network device, and the same contents as those in the embodiment of the second aspect will not be repeated.

[0146] FIG4 is a schematic diagram of an information sending device according to an embodiment of the present application. As shown in FIG4 , the information sending device 400 includes:

[0147] A transmitter 401 sends TCI state-related information configured for layer 1 / layer 2 triggered cell switching (LTM) to a terminal device; the TCI state-related information includes TCI state indication information, or includes TCI state indication information and TCI state activation information; one or more TCI states activated by the TCI state activation information and / or the reference signal in the TCI state indicated by the TCI state indication information or the QCL source reference signal of the reference signal is tracked by the terminal device, or is not tracked.

[0148] For the implementation of each information and transmitter, please refer to the embodiments of the first and second aspects mentioned above, which will not be repeated here.

[0149] The above embodiments are merely exemplary of the present invention, but the present invention is not limited thereto. Appropriate modifications may be made based on the above embodiments. For example, the above embodiments may be used alone, or one or more of the above embodiments may be combined.

[0150] It is worth noting that the above only describes the components or modules related to the present application, but the present application is not limited thereto. The information sending device 400 may also include other components or modules. For the specific contents of these components or modules, reference may be made to the relevant art.

[0151] In addition, for the sake of simplicity, FIG4 only illustrates the connection relationship or signal direction between various components or modules. However, it should be clear to those skilled in the art that various related technologies such as bus connection can be used. The above-mentioned components or modules can be implemented by hardware facilities such as processors, memories, transmitters, and receivers; the implementation of this application is not limited to this.

[0152] Embodiments of the fourth aspect

[0153] The embodiment of the present application provides a signal processing device, which may be, for example, a terminal device, or one or more components or assemblies configured in the terminal device, and the same contents as those in the embodiment of the first aspect will not be repeated here.

[0154] FIG5 is a schematic diagram of a signal processing device according to an embodiment of the present application. As shown in FIG5 , the signal processing device 500 includes:

[0155] A receiver 501 receives transmission configuration indication state (TCI state) related information for layer 1 / layer 2 triggered cell handover (LTM) configuration sent by a network device; the TCI state related information includes TCI state indication information, or includes TCI state indication information and TCI state activation information;

[0156] A processor 502 tracks a reference signal in one or more TCI states activated by the TCI state activation information and / or a TCI state indicated by the TCI state indication information, or a quasi co-location (QCL) source reference signal of the reference signal, or does not track a reference signal.

[0157] For the implementation of each information and transmitter, please refer to the embodiments of the first and second aspects mentioned above, which will not be repeated here.

[0158] It is worth noting that the above description only describes the components or modules related to the present application, but the present application is not limited thereto. The signal processing device 500 may also include other components or modules. For details of these components or modules, reference may be made to related technologies.

[0159] Furthermore, for simplicity, Figure 5 illustrates only the connection relationships and signal paths between various components or modules. However, those skilled in the art will appreciate that various related technologies, such as bus connections, can be employed. Each of the aforementioned components or modules can be implemented using hardware such as a processor, memory, transmitter, and receiver. For example, the tracking behavior involved in the embodiments of this application can be implemented using a processor and memory.

[0160] Embodiments of the fifth aspect

[0161] An embodiment of the present application also provides a communication system, and reference may be made to FIG1 . The contents that are the same as those in the first to fourth aspects of the embodiments will not be repeated.

[0162] In some embodiments, the communication system 100 may include at least: a network device 101 and / or a terminal device 102, wherein the network device 101 includes the information sending device 400 in the embodiment of the third aspect, and the terminal device 102 includes the signal processing device 500 in the embodiment of the fourth aspect, which will not be repeated here.

[0163] An embodiment of the present application further provides a network device, which may be, for example, a base station, but the present application is not limited thereto and may also be other network devices.

[0164] Figure 6 is a schematic diagram illustrating the structure of a network device according to an embodiment of the present application. As shown in Figure 6 , network device 600 may include a processor 610 (e.g., a central processing unit (CPU)) and a memory 620 ; the memory 620 is coupled to the processor 610 . The memory 620 may store various data and may also store an information processing program 630 , which is executed under the control of the processor 610 .

[0165] For example, the processor 610 may be configured to execute a program to implement the method described in the embodiment of the second aspect.

[0166] In addition, as shown in FIG6 , network device 600 may further include: a transceiver 640 and an antenna 650, etc.; wherein, the functions of the above components are similar to those in the prior art and are not described in detail here. It is worth noting that network device 600 does not necessarily include all the components shown in FIG6 ; in addition, network device 600 may also include components not shown in FIG6 , and reference may be made to the prior art for details.

[0167] The embodiment of the present application also provides a terminal device, but the present application is not limited thereto and may also be other devices.

[0168] Figure 7 is a schematic diagram of a terminal device according to an embodiment of the present application. As shown in Figure 7 , terminal device 700 may include a processor 710 and a memory 720. Memory 720 stores data and programs and is coupled to processor 710. It should be noted that this diagram is exemplary; other types of structures may be used to supplement or replace this structure to implement telecommunication or other functions.

[0169] For example, the processor 710 may be configured to execute a program to implement the method described in the embodiment of the first aspect.

[0170] As shown in Figure 7 , the terminal device 700 may further include: a communication module 730, an input device 740, a display 750, and a power supply 760. The functions of these components are similar to those in the prior art and are not described in detail here. It is worth noting that the terminal device 700 does not necessarily include all of the components shown in Figure 7 , and these components are not essential. Furthermore, the terminal device 700 may also include components not shown in Figure 7 , for which reference may be made to the prior art.

[0171] An embodiment of the present application also provides a computer program, wherein when the program is executed in a terminal device, the program causes the terminal device to perform the signal processing method described in the embodiment of the first aspect.

[0172] An embodiment of the present application also provides a storage medium storing a computer program, wherein the computer program enables a terminal device to execute the signal processing method described in the embodiment of the first aspect.

[0173] An embodiment of the present application also provides a computer program, wherein when the program is executed in a network device, the program causes the network device to execute the information sending method described in the embodiment of the second aspect.

[0174] An embodiment of the present application also provides a storage medium storing a computer program, wherein the computer program enables a network device to execute the information sending method described in the embodiment of the second aspect.

[0175] The above devices and methods of the present application can be implemented by hardware or by a combination of hardware and software. The present application relates to such a computer-readable program that, when executed by a logic component, enables the logic component to implement the devices or components described above, or enables the logic component to implement the various methods or steps described above. The present application also relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, etc.

[0176] The method / device described in conjunction with the embodiments of the present application can be directly embodied as hardware, a software module executed by a processor, or a combination of the two. For example, one or more of the functional block diagrams shown in the figure and / or one or more combinations of functional block diagrams can correspond to various software modules of the computer program flow or to various hardware modules. These software modules can respectively correspond to the various steps shown in the figure. These hardware modules can be implemented by solidifying these software modules, for example, using a field programmable gate array (FPGA).

[0177] The software module may be located in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. A storage medium may be coupled to a processor so that the processor can read information from the storage medium and write information to the storage medium; or the storage medium may be an integral part of the processor. The processor and the storage medium may be located in an ASIC. The software module may be stored in the memory of the mobile terminal or in a memory card that can be inserted into the mobile terminal. For example, if the device (such as a mobile terminal) uses a large-capacity MEGA-SIM card or a large-capacity flash memory device, the software module may be stored in the MEGA-SIM card or the large-capacity flash memory device.

[0178] One or more of the functional blocks and / or one or more combinations of functional blocks described in the accompanying drawings may be implemented as a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, or any appropriate combination thereof for performing the functions described in this application. One or more of the functional blocks and / or one or more combinations of functional blocks described in the accompanying drawings may also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in communication with a DSP, or any other such configuration.

[0179] The present application has been described above in conjunction with specific embodiments. However, those skilled in the art should understand that these descriptions are merely illustrative and are not intended to limit the scope of protection of the present application. Those skilled in the art may make various modifications and variations to the present application based on the spirit and principles of the present application, and such modifications and variations are also within the scope of the present application.

[0180] Regarding the implementation methods including the above embodiments, the following additional notes are also disclosed:

[0181] 1. A signal processing method, characterized in that the method comprises:

[0182] The terminal device receives transmission configuration indication state (TCI state) related information for layer 1 / layer 2 triggered cell handover (LTM) configuration sent by the network device; the TCI state related information includes TCI state indication information, or includes TCI state indication information and TCI state activation information;

[0183] The terminal device tracks the reference signal in one or more TCI states activated by the TCI state activation information and / or the TCI state indicated by the TCI state indication information or the quasi co-location (QCL) source reference signal of the reference signal, or does not track the reference signal.

[0184] 2. The method according to Supplement 1, characterized in that:

[0185] The terminal device also receives first configuration information sent by the network device for configuring a reference signal for layer 1 / layer 2 triggered cell switching (LTM), wherein the reference signal includes a synchronization signal block (SSB), or includes an SSB and a tracking channel state information reference signal (CSI-RS for tracking, TRS), and the reference signal corresponds to a current serving cell or a neighboring candidate cell.

[0186] 3. The method according to Supplementary Note 2, characterized in that:

[0187] The terminal device also receives second configuration information sent by the network device for configuring a TCI state pool for layer 1 / layer 2 triggered cell switching (LTM), wherein at least one reference signal in the TCI state in the TCI state pool is TRS or SSB, and the TCI state pool corresponds to the current serving cell and / or adjacent candidate cell.

[0188] 4. The method according to Note 3, wherein the TCI state is a unified TCI state, wherein at least one reference signal in the DL TCI state or the Joint TCI state is TRS or SSB, and wherein tracking the reference signal in the TCI state includes tracking the reference signal in the Joint TCI state or the DL TCI state.

[0189] 5. According to the method described in Note 1, the behavior of the terminal device tracking the reference signal at least includes measuring the reference signal, obtaining downlink time and frequency synchronization, and maintaining synchronization information.

[0190] 6. The method according to Note 1, wherein the terminal device tracks one or more SSBs, and the SSB is one of the following:

[0191] Reference signal in activated TCI state;

[0192] A QCL source reference signal of the reference signal in the activated TCI state;

[0193] A reference signal in the indicated TCI state;

[0194] The QCL source reference signal of the reference signal in the indicated TCI state.

[0195] 7. The method according to Note 1, wherein the terminal device tracks one or more TRSs, and the TRS is one of the following:

[0196] Reference signal in activated TCI state;

[0197] Reference signal in the indicated TCI state.

[0198] 8. A method for sending information, wherein the method comprises:

[0199] The network device sends TCI state-related information configured for layer 1 / layer 2 triggered cell switching (LTM) to the terminal device; the TCI state-related information includes TCI state indication information, or includes TCI state indication information and TCI state activation information; one or more TCI states activated by the TCI state activation information and / or the reference signal in the TCI state indicated by the TCI state indication information or the QCL source reference signal of the reference signal is tracked by the terminal device, or is not tracked.

[0200] 9. A network device comprising a memory and a processor, wherein the memory stores a computer program, and the processor is configured to execute the computer program to implement the method described in Note 1.

[0201] 10. A terminal device comprising a memory and a processor, wherein the memory stores a computer program, and the processor is configured to execute the computer program to implement the method as described in any one of Notes 1 to 8.

Claims

1. A signal processing device, applied to a terminal device, characterized in that: The device comprises: A receiver, which receives transmission configuration indication state (TCI state) related information for layer 1 / layer 2 triggered cell handover (LTM) configuration sent by a network device; the TCI state related information includes TCI state indication information, or includes TCI state indication information and TCI state activation information; A processor that tracks a reference signal in one or more TCI states activated by the TCI state activation information and / or a TCI state indicated by the TCI state indication information or a quasi co-location (QCL) source reference signal of the reference signal, or does not track a reference signal.

2. The device according to claim 1, characterized in that The receiver also receives first configuration information sent by the network device for configuring a reference signal for layer 1 / layer 2 triggered cell switching (LTM), wherein the reference signal includes a synchronization signal block (SSB), or includes an SSB and a tracking channel state information reference signal (CSI-RS for tracking, TRS), and the reference signal corresponds to a current serving cell or a neighboring candidate cell.

3. The device according to claim 2, characterized in that The receiver also receives second configuration information sent by the network device for configuring a TCI state pool for layer 1 / layer 2 triggered cell switching (LTM), wherein at least one reference signal in the TCI state pool is TRS or SSB, and the TCI state pool corresponds to the current serving cell and / or an adjacent candidate cell.

4. The device according to claim 3, wherein: The configured reference signal includes TRS, and in the TCI state in the TCI state pool, at least one reference signal is TRS; or the terminal device expects that in the TCI state in the TCI state pool, at least one reference signal is TRS.

5. The device according to claim 3, wherein: The TCI state activation information is used to activate one or more TCI states in the TCI state pool, and at least one reference signal in the activated TCI states is TRS or SSB.

6. The device according to claim 5, wherein: The configured reference signal includes TRS, and in the activated TCI state, at least one reference signal is TRS; or the terminal device expects that in the activated TCI state, at least one reference signal is TRS.

7. The device according to claim 1, wherein: The TCI state indication information is included in the cell switching command and carried by the MAC CE signaling, and the TCI state activation information is carried by the MAC CE signaling.

8. The device according to claim 1, wherein: The reference signal for tracking is TRS or SSB.

9. The device according to claim 1, wherein: The processor also tracks the reference signal in one or more TCI states activated by the TCI state activation information and / or the TCI state indicated by the TCI state indication information or the quasi-co-site (QCL) source reference signal of the reference signal, or does not track the reference signal, based on the capability of the terminal device.

10. The device according to claim 9, characterized in that The device also includes: A transmitter sends information about layer 1 / layer 2 triggered cell handover (LTM) related capabilities to the network device, wherein the capabilities at least include whether to support tracking of TRS during the LTM process.

11. The device according to claim 10, characterized in that The capability at least includes whether to support tracking of TRS before receiving a cell switching command or completing a cell switching.

12. The device according to claim 1 or 9, wherein: The terminal device is configured with a TRS, and at least one reference signal is one or more TCI states of an SSB, which is activated before receiving a cell switching command, and the terminal device tracks the SSB in the activated TCI state, and / or tracks the reference signal in the TCI state indicated in the cell switching command or the QCL source reference signal of the reference signal; or, The terminal device is configured with TRS, and at least one reference signal is one or more TCI states of TRS, which is activated before receiving a cell switching command, and the terminal device does not support tracking of TRS, and the terminal device tracks the TRS in the activated TCI state or the QCL source reference signal of the TRS, and / or tracks the reference signal in the TCI state indicated in the cell switching command or the QCL source reference signal of the reference signal; or, The terminal device is configured with a TRS, and at least one reference signal is one or more TCI states of the TRS, which is activated before receiving a cell switching command, and the terminal device supports tracking of the TRS, and the terminal device tracks the TRS in the activated TCI state and / or tracks the reference signal in the TCI state indicated in the cell switching command; or, The terminal device is not configured with TRS, and at least one of the reference signals is one or more TCI states of SSB, which is activated before receiving the cell switching command. The terminal device tracks the SSB in the activated TCI state and / or tracks the reference signal in the TCI state indicated in the cell switching command.

13. The device according to claim 1 or 9, wherein: No TCI state is activated before receiving the cell switching command, and the terminal device supports TRS tracking Tracking, the terminal device tracking the reference signal in the TCI state indicated in the cell switching command; or, No TCI state is activated before receiving the cell switching command, and the terminal device does not support tracking of TRS, and the terminal device tracks the reference signal in the TCI state indicated in the cell switching command or the QCL source reference signal of the reference signal.

14. The device according to claim 13, wherein: No TCI state is activated before receiving a cell handover command, and no reference signal is tracked before receiving a cell handover command.

15. The device according to claim 1 or 9, wherein: The terminal device is configured with a TRS, the terminal device supports tracking the TRS before receiving a cell switching command, and at least one reference signal is one or more TCI states of the TRS, which are activated before receiving the cell switching command, and the terminal device tracks the TRS in the activated TCI state until new TCI state activation information is received in the target cell; or, The terminal device is configured with a TRS, the terminal device supports tracking the TRS before receiving a cell switching command, and at least one of the reference signals is one or more TCI states of an SSB, which is activated before receiving the cell switching command, and the terminal device tracks the SSB in the activated TCI state until new TCI state activation information is received in the target cell; or, The terminal device is configured with TRS, the terminal device does not support tracking of TRS before receiving a cell switching command, and at least one reference signal is one or more TCI states of TRS, which is activated before receiving the cell switching command, the terminal device tracks the QCL source reference signal of TRS in the activated TCI state before receiving the cell switching command, and tracks the TRS in the activated TCI state after receiving the cell switching command until receiving new TCI state activation information in the target cell; or, The terminal device is configured with TRS, the terminal device does not support tracking of TRS before receiving a cell switching command, and at least one reference signal is one or more TCI states of SSB, which is activated before receiving the cell switching command, and the terminal device tracks the SSB in the activated TCI state until new TCI state activation information is received in the target cell.

16. The device according to claim 1 or 9, wherein: The terminal device is not configured with TRS, and at least one of the reference signals is one or more TCI states of SSB, which is activated before receiving the cell switching command. The terminal device tracks the SSB in the activated TCI state until new TCI state activation information is received in the target cell.

17. The device according to claim 1 or 9, wherein: The terminal device is configured with a TRS, the terminal device supports tracking the TRS before completing a cell handover, and at least one reference signal is one or more TCI states of the TRS, which are activated before receiving a cell handover command, and the terminal device tracks the TRS in the activated TCI state until new TCI state activation information is received in the target cell; or, The terminal device is configured with a TRS, the terminal device supports tracking the TRS before completing a cell handover, and at least one of the reference signals is one or more TCI states of an SSB, which is activated before receiving a cell handover command, and the terminal device tracks the SSB in the activated TCI state until new TCI state activation information is received in a target cell; or, The terminal device is configured with TRS, the terminal device does not support tracking of TRS before completing cell switching, and at least one reference signal is one or more TCI states of TRS, which is activated before receiving a cell switching command, the terminal device tracks the QCL source reference signal of the TRS in the activated TCI state before completing the cell switching, and tracks the TRS in the activated TCI state after completing the switching until new TCI state activation information is received in the target cell; or, The terminal device is configured with TRS, the terminal device does not support tracking of TRS before completing cell switching, and at least one reference signal is one or more TCI states of SSB, which is activated before receiving the cell switching command, and the terminal device tracks the SSB in the activated TCI state until new TCI state activation information is received in the target cell.

18. According to the apparatus according to claim 1, after the target cell receives new TCI state activation information, the terminal device continues to track the reference signal of the adjacent candidate cell, the reference signal coming from one or more TCI states activated by the TCI state activation information and / or the reference signal in the TCI state indicated by the TCI state indication information or a quasi-co-site (QCL) source reference signal of the reference signal, or no longer tracks the reference signal, or tracks a part of the reference signal.

19. An information sending device, applied to a network device, characterized in that: The device comprises: A transmitter that sends TCI state-related information configured for layer 1 / layer 2 triggered cell switching (LTM) to a terminal device; the TCI state-related information includes TCI state indication information, or includes TCI state indication information and TCI state activation information; one or more TCI states activated by the TCI state activation information and / or a reference signal in the TCI state indicated by the TCI state indication information or a QCL source reference signal of the reference signal is tracked by the terminal device, or is not tracked.

20. A communication system, characterized in that: The communication system includes a network device and / or a terminal device, the terminal device includes the signal processing device according to any one of claims 1 to 18, and the network device includes the information sending device according to claim 19.

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