Method for indicating TCI state and related equipment

Abstract

The invention discloses a method for indicating a TCI state and related equipment. The method comprises: for a first signal transmission and a second signal transmission associated with a TRP, indicating a first TCI state and a second TCI state which are different, respectively, where the first signal transmission and the second signal transmission have different signal types or experience different channel conditions.

Description

Method and related device for indicating TCI status

[0001] Priority Declaration

[0002] This application claims priority to the Chinese patent application filed on May 16, 2022, with application number 202210527398.9 and invention name “Method and related equipment for indicating TCI status”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present disclosure relates to the field of wireless communications, and in particular, to a method for indicating a TCI status and related devices. Background Art

[0004] Wireless communication systems can use multiple antennas to transmit multiple beams. In such systems, network-side devices (e.g., base stations or transmit / receive nodes (TRPs)) use the Transmission Configuration Indication (TCI) status to send quasi-co-location (QCL) information to user equipment (UEs). If two signals are quasi-co-located with respect to QCL type D, the two signals can be transmitted using the same beam. Therefore, the TCI status can indicate the beam used to perform the transmission.

[0005] In existing technologies, a TRP can only activate one TCI state at a time, thus indicating only one common beam. However, many signals implement different functions. Using the same common beam may hinder the specific functional implementation of different signals. Moreover, when using diversity or multiplexing technologies, a single common beam is clearly insufficient. Furthermore, a single common beam is not suitable for multiple TRP scenarios.

[0006] Summary of the Invention

[0007] The present disclosure provides a unified TCI state design scheme for multi-beam operation. The scheme can indicate different TCI states for different types of signals. Additionally, the scheme can also indicate different TCI states for the same type of signals passing through different channels. In addition, the scheme is designed for two communication scenarios of single TRP and multiple TRP. More specifically, the communication examples targeted by the present scheme include but are not limited to: simultaneous transmission of control signals and data signals; simultaneous transmission of control signals and pilot signals; simultaneous transmission of control signals, data signals and feedback signals; diversity transmission of control signals; spatial multiplexing of data signals; coordinated transmission of control signals under multiple TRPs; separate transmission of control signals under multiple TRPs, and feedback signals under multiple TRPs, etc.

[0008] One aspect of the present disclosure relates to an electronic device for a network side, the electronic device including a processing circuit, the processing circuit being configured to: indicate a first TCI state for a first signal transmission associated with a TRP; and indicate a second TCI state for a second signal transmission associated with the TRP; wherein the first signal transmission and the second signal transmission have different signal types or experience different channel conditions, and the first TCI state is different from the second TCI state.

[0009] Another aspect of the present disclosure relates to a method performed on a network side, the method comprising: indicating a first TCI state for a first signal transmission associated with a TRP; indicating a second TCI state for a second signal transmission associated with the TRP; wherein the first signal transmission and the second signal transmission have different signal types or experience different channel conditions, and the first TCI state is different from the second TCI state.

[0010] Another aspect of the present disclosure relates to a computer-readable storage medium storing one or more instructions, which, when executed by one or more processing circuits of an electronic device, causes the electronic device to perform any method as described in the present disclosure.

[0011] Another aspect of the present disclosure relates to a computer program product, comprising a computer program, which implements any method as described in the present disclosure when executed by a processor.

[0012] Another aspect of the present disclosure relates to an apparatus comprising means for performing any of the methods described in the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The above and other objects and advantages of the present disclosure will be further described below in conjunction with specific embodiments and with reference to the accompanying drawings. In the accompanying drawings, identical or corresponding technical features or components will be represented by identical or corresponding reference numerals.

[0014] FIG1 shows an exemplary block diagram of an electronic device according to an embodiment of the present disclosure.

[0015] FIG2 shows an exemplary flow chart of a method according to an embodiment of the present disclosure.

[0016] FIG. 3A illustrates a beaming scheme for first and second signal transmissions according to an embodiment of the present disclosure.

[0017] FIG3B shows a beamforming scheme for first signal transmission, second signal transmission, and third signal transmission according to an embodiment of the present disclosure.

[0018] FIG4A shows a timing diagram for PDCCH transmission and PDSCH transmission according to an embodiment of the present disclosure.

[0019] FIG4B shows a timing diagram for PDCCH transmission and Ap-CSI-RS transmission according to an embodiment of the present disclosure.

[0020] FIG5A shows a schematic diagram of spatial diversity transmission according to an embodiment of the present disclosure.

[0021] FIG5B shows a schematic diagram of spatial multiplexing of data channels according to an embodiment of the present disclosure.

[0022] 6A-6D illustrate an embodiment of a multi-TRP scenario according to an embodiment of the present disclosure.

[0023] FIG7 is a block diagram illustrating a first example of a schematic configuration of a gNB to which the technology of the present disclosure may be applied.

[0024] FIG8 is a block diagram illustrating a second example of a schematic configuration of a gNB to which the technology of the present disclosure may be applied.

[0025] FIG. 9 is a block diagram illustrating an example of a schematic configuration of a communication device to which the technology of the present disclosure can be applied.

[0026] FIG. 10 is a block diagram illustrating an example of a schematic configuration of a car navigation device to which the technology of the present disclosure can be applied.

[0027] While the embodiments described in this disclosure may be susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and are herein described in detail. However, it should be understood that the drawings and detailed description thereof are not intended to limit the embodiments to the particular forms disclosed, but on the contrary, the intent is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the claims. DETAILED DESCRIPTION

[0028] Exemplary embodiments of the present disclosure will be described below with reference to the accompanying drawings. For the sake of clarity and conciseness, not all features of the embodiments are described in the specification. However, it should be understood that many implementation-specific settings must be made in the process of implementing the embodiments in order to achieve the developer's specific goals, such as meeting those restrictions related to equipment and services, and these restrictions may vary depending on the implementation. In addition, it should be understood that although the development work may be very complex and time-consuming, it is only a routine task for those skilled in the art who benefit from the contents of this disclosure.

[0029] It should also be noted here that in order to avoid obscuring the present disclosure due to unnecessary details, only the processing steps and / or equipment structures that are closely related to at least the scheme according to the present disclosure are shown in the accompanying drawings, while other details that are not very relevant to the present disclosure are omitted.

[0030] 1. Exemplary Equipment

[0031] 1 shows an exemplary block diagram of an electronic device 100 according to an embodiment of the present disclosure. The electronic device 100 may include a communication unit 110, a storage unit 120, and a processing circuit 130.

[0032] The electronic device 100 can be used to implement the method for indicating the TCI status described in the present disclosure. The method is performed on the network side of the wireless communication system. Therefore, the electronic device 100 can be implemented on the network side. The electronic device 100 can be used to perform one or more operations related to the TRP described in this document. Specifically, the electronic device 100 can be implemented as the TRP itself, as a part of the TRP, or as a control device for controlling the TRP. For example, the electronic device 100 can be implemented as a chip for controlling the TRP. In this document, the electronic device 100 is implemented as the TRP itself, which is merely for the convenience of description and is not intended to constitute a limitation.

[0033] The communication unit 110 of the electronic device 100 can be used to receive or send radio transmissions. The communication unit 110 can be used to establish and maintain one or more communication links. Each communication link can carry associated transmissions. In an embodiment of the present disclosure, the communication unit 110 can perform functions such as up-conversion and digital-to-analog conversion on the transmitted radio signals, and / or perform functions such as down-conversion and analog-to-digital conversion on the received radio signals. Various technologies can be used to implement the communication unit 110. For example, the communication unit 110 can be implemented as communication interface components such as an antenna device, a radio frequency circuit, and a portion of a baseband processing circuit. In Figure 1, the communication unit 110 is drawn with a dotted line because it can alternatively be located within the processing circuit 130 or outside the electronic device 100.

[0034] The storage unit 120 of the electronic device 100 can store information generated by the processing circuit 130, information received from other devices via the communication unit 110 or information to be transmitted to other devices, programs, machine code, and data used for the operation of the electronic device 100, etc. The storage unit 120 can be a volatile memory and / or a non-volatile memory. For example, the storage unit 120 can include, but is not limited to, random access memory (RAM), dynamic random access memory (DRAM), static random access memory (SRAM), read-only memory (ROM), and flash memory. The storage unit 120 is drawn with a dotted line because it can alternatively be located within the processing circuit 130 or outside the electronic device 100.

[0035] The processing circuit 130 of the electronic device 100 may be configured to perform one or more operations, thereby providing various functions of the electronic device 100. The processing circuit 130 may perform corresponding operations by executing one or more executable instructions stored in the storage unit 120.

[0036] According to embodiments of the present disclosure, processing circuitry 130 may perform one or more operations to implement the methods described herein. To this end, processing circuitry 130 may include a TCI state indicating unit 131. TCI state indicating unit 131 may be configured to indicate a first TCI state for a first signal transmission associated with a Transmission Relay Protocol (TRP), and to indicate a second TCI state for a second signal transmission associated with the TRP. The first signal transmission and the second signal transmission may have different signal types or may experience different channel conditions. In some embodiments, the first signal transmission and the second signal transmission may be associated with multiple signals of different types with different purposes or functions. In other embodiments, the first signal transmission and the second signal transmission may be associated with multiple signals of the same type that experience different channels. The first TCI state indicated by TCI state indicating unit 131 for the first signal transmission may be different from the second TCI state indicated for the first signal transmission. Accordingly, the transmit / receive beam used for the first signal transmission may be different from the transmit / receive beam used for the second signal transmission. The various functions and steps performed by processing circuitry 130 of electronic device 100 will be further described below in conjunction with various embodiments.

[0037] It should be noted that the various units described above are exemplary and / or preferred modules for implementing the processing described in this disclosure. These modules can be hardware units (such as central processing units, field programmable gate arrays, digital signal processors or application-specific integrated circuits, etc.) and / or software modules (such as computer-readable programs). The modules for implementing the various steps described below are not described in detail above. However, as long as there are steps for performing a certain processing, the corresponding modules or units (implemented by hardware and / or software) for implementing the same processing can be arranged. The technical solutions defined by all combinations of the steps described below and the units corresponding to these steps are all included in the disclosure of this disclosure, as long as the technical solutions they constitute are complete and applicable.

[0038] In addition, the device composed of various units can be incorporated into a hardware device such as a computer as a functional module. In addition to these functional modules, the electronic device can of course have other hardware or software components.

[0039] 2. Exemplary Methods

[0040] Figure 2 shows an exemplary flow chart of a method 200 according to an embodiment of the present disclosure. The method 200 can be performed by a network-side device. The network-side device may include the TRP itself, a portion of the TRP, or a control device for controlling the TRP. In this document, the TRP can be used interchangeably with the base station, for example. When the electronic device 100 is used to implement the network-side device described in this disclosure, the method 200 can be performed by the processing circuit 130 of the electronic device 100. In this document, the method 200 is described as being performed by the TRP itself, which is merely for the convenience of description and is not intended to constitute a limitation.

[0041] According to an embodiment of the present disclosure, method 200 may begin at step 210. In step 210, a TRP may be configured to indicate a first TCI state for a first signal transmission associated with the TRP. Subsequently, in step 220, the TRP may be configured to indicate a second TCI state for a second signal transmission associated with the TRP. The first signal transmission and the second signal transmission may have different signal types. Alternatively, the first signal transmission and the second signal transmission may experience different channel conditions. The first TCI state indicated for the first signal transmission may be different from the second TCI state indicated for the first signal transmission.

[0042] According to an embodiment of the present disclosure, different TCI states associated with the first signal transmission and the second signal transmission can be indicated by TRP signaling (e.g., MAC CE and / or DCI). In a preferred embodiment, for multiple TCI states (e.g., the first TCI state, the second TCI state, or other TCI states described below), a single set of signaling can be used to indicate the multiple TCI states at once.

[0043] Method 200 can be performed in response to different situations. In some embodiments, method 200 can be performed in response to the first signal transmission and the second signal transmission being associated with multiple signals of different types (having different purposes or functions). For example, the first signal transmission can be associated with a control signal, while the second specific signal transmission can be associated with a data signal or a pilot signal. For such first and second signal transmissions, the TRP can decide to perform method 200.

[0044] In an alternative embodiment, method 200 may be performed in response to the first signal transmission and the second signal transmission being associated with multiple signals of the same type that travel through different channels. In one example, the first signal transmission and the second signal transmission may be used for diversity transmission of the same control signal, wherein the first signal transmission and the second signal transmission may carry the same control signal information but travel through different channels. In another example, the first signal transmission and the second signal transmission may be used to implement data channel spatial multiplexing of a data signal, wherein the first signal transmission and the second signal transmission may carry different spatial layers and travel through different channels. The TRP may also determine to perform method 200 for such first signal transmission and second signal transmission.

[0045] 2.1 Indicating different TCI states for multiple signal transmissions of different types

[0046] The different types of multiple signal transmissions may have different purposes or functions. According to an embodiment of the present disclosure, different TCI states may be indicated for the different types of first signal transmissions and second signal transmissions.

[0047] In some embodiments, the first signal transmission may be a downlink control signal transmission. Downlink control signal transmission may be used to transmit control information from the TRP to the UE. The control information carried by the downlink control signal transmission may include scheduling information for one or more other types of signal transmissions. By way of example and not limitation, the downlink control signal transmission may be a physical downlink control channel (PDCCH) transmission. The scheduling information carried by the PDCCH may include downlink control information (DCI), etc.

[0048] In the above embodiment, the second signal transmission may be other types of transmission different from the downlink control signal transmission.

[0049] In some embodiments, the second signal transmission may be a data signal transmission. In some examples, the data signal transmission may be a downlink data signal transmission for transmitting data packets from the TRP to the UE. By way of example and not limitation, an example of a downlink data signal transmission is a physical downlink shared channel (PDSCH) transmission. The PDSCH transmission may be associated with the first signal transmission. For example, the PDSCH transmission may be scheduled by the first signal transmission as a PDCCH transmission. In other examples, the data signal transmission may be an uplink data signal transmission for transmitting data from the UE to the TRP. By way of example and not limitation, an example of an uplink data signal transmission is a physical uplink shared channel (PUSCH) transmission.

[0050] In some embodiments, the second signal transmission may be a pilot signal transmission. In some examples, the second signal transmission may be a downlink pilot signal transmission for transmitting a downlink pilot signal from a TRP to a UE. By way of example and not limitation, the downlink pilot signal may be an aperiodic channel state information reference signal (Ap-CSI-RS). In other examples, the second signal transmission may be an uplink pilot signal transmission for transmitting an uplink pilot signal from a UE to a TRP. By way of example and not limitation, the uplink pilot signal may be an aperiodic sounding reference signal (Ap-SRS). The second signal transmission as a pilot signal transmission may be associated with the first signal transmission as a control signal transmission. For example, the second signal transmission as an Ap-CSI-RS transmission or an Ap-SRS transmission may be scheduled by the first signal transmission as a PDCCH transmission (e.g., a DCI in a PDCCH).

[0051] In a further embodiment, the TRP may also perform a third signaling transmission associated with the TRP. For this third signaling transmission, the TRP may indicate a third TCI state. The third signaling transmission may be of a different type than the first signaling transmission and the second signaling transmission. Accordingly, the third TCI state indicated for the third signaling transmission may be different from the first TCI state indicated for the first signaling transmission and the second TCI state indicated for the second signaling transmission.

[0052] In some embodiments, the first signal transmission may be a downlink control signal transmission (e.g., a PDCCH transmission), the second signal transmission may be a downlink data signal transmission associated with the downlink control signal transmission (e.g., a PDSCH transmission scheduled by the PDCCH transmission), and the third signal transmission may be an uplink control signal transmission associated with the downlink data signal transmission. The uplink control signal transmission may include feedback information associated with the downlink data signal transmission. As an example and not limitation, the third signal transmission may be a physical uplink control channel (PUCCH) transmission associated with the PDSCH transmission. The PUCCH transmission may include information such as a hybrid automatic repeat request (HARQ). The HARQ information may be used to provide feedback to the TRP on receiving the PDSCH transmission. For example, the HARQ information may include HARQ-ACK or HARQ-NACK.

[0053] In some embodiments, the first signal transmission may be a downlink control signal transmission (e.g., a PDCCH transmission), the second signal transmission may be a downlink pilot signal transmission associated with the downlink control signal transmission (e.g., an Ap-CSI-RS transmission scheduled by the PDCCH transmission), and the third signal transmission may be an uplink pilot signal transmission associated with the downlink control signal transmission (e.g., an Ap-SRS transmission scheduled by the PDCCH transmission). Different TCI states may be indicated for the downlink control signal transmission, the downlink pilot signal transmission, and the downlink control signal transmission.

[0054] Table 1 and Table 2 show examples in which both the first signal transmission and the second signal transmission are downlink transmissions, where the total number of configured downlink TCI states is M (M>1).

[0055] Table 1

[0056] Table 2

[0057] Table 3 and Table 4 show examples where the first signal transmission is downlink transmission and the second signal transmission is uplink transmission, wherein the total number of configured uplink TCI states is N (N>1).

[0058] Table 3

[0059] Table 4

[0060] Table 5 and Table 6 show examples of the first signal transmission, the second signal transmission, and the third signal transmission.

[0061] Table 5

[0062] It should be noted that different labels are used in each of Tables 1 to 6 to distinguish different TCI states within the same table. Different tables may have the same TCI state. For example, "TCI State d" in Table 6 is different from "TCI State e" and "TCI State f" in the same Table 6, but "TCI State d" may be the same as "TCI State a" in another table (e.g., Table 5). The same is true for Tables 7 to 14.

[0063] According to an embodiment of the present disclosure, different TCI states indicated for the first signal transmission, the second signal transmission (and optionally the third signal transmission) may be associated with different beams. Based on the indicated different TCI states, the TRP and the UE may use corresponding different transmit / receive beams to perform the first signal transmission, the second signal transmission (and optionally the third signal transmission).

[0064] Figure 3A shows a beam scheme for first signal transmission and second signal transmission according to an embodiment of the present disclosure. For TRP 310 and UE 320, the first TCI state indicated for the first signal transmission may result in the use of a first beam pair (330A, 330B) to perform transmission and reception of the first signal transmission. The second TCI state indicated for the second signal transmission may result in the use of a second beam pair (340A, 340B) to perform transmission and reception of the second signal transmission. Depending on the type and implemented functions of the first and second signal transmissions, the second beam pair may be different from the first beam pair. For example, the width of each beam in the second beam pair may be narrower than the width of each beam in the first beam pair. In this case, the wider first beam pair is suitable for transmission of control signaling (e.g., PDCCH transmission) to improve coverage of control signaling; the narrower second beam pair is suitable for transmission of data (e.g., PDSCH transmission) to improve efficiency of data transmission. In other embodiments, the second beam pair may also be different from the first beam pair in other aspects (eg, direction, modulation and coding scheme, power control, etc.).

[0065] 3B shows a beam scheme for first signal transmission, second signal transmission, and third signal transmission according to an embodiment of the present disclosure. For TRP 310 and UE 320, the first TCI state indicated for the first signal transmission may result in the use of a first beam pair (330A, 330B) to perform transmission and reception of the first signal transmission. The second TCI state indicated for the second signal transmission may result in the use of a second beam pair (340A, 340B) to perform transmission and reception of the second signal transmission. The third TCI state indicated for the third signal transmission may result in the use of a third beam pair (350A, 350B) to perform transmission and reception of the third signal transmission. Once again, depending on the type and implemented functions of the first signal transmission, the second signal transmission, and the third signal transmission, the first beam pair, the second beam pair, and the third beam pair may be different from each other.

[0066] According to an embodiment of the present disclosure, when the first signal transmission and the second signal transmission are both downlink transmissions sent from the TRP to the UE, it can be determined that the scheduling gap between the first signal transmission and the second signal transmission is greater than a predetermined time threshold, so that different beams can be used for the first signal transmission and the second signal transmission.

[0067] FIG4A shows a timing diagram for PDCCH transmission and PDSCH transmission according to an embodiment of the present disclosure.

[0068] Conventionally, if there is no TCI field in the DCI of the first signal transmission (PDCCH transmission) 410, and the scheduling gap T1 between the first signal transmission 410 and the second signal transmission (PDSCH transmission) 420 scheduled by the first signal transmission 410 is greater than the associated first time threshold set by TRP, then the TCI state and QCL assumptions associated with the second signal transmission 420 will typically follow the first signal transmission 410 (i.e., the second signal transmission 420 has a consistent TCI state with the first signal transmission 410).

[0069] However, according to an embodiment of the present disclosure, the TRP may indicate a different TCI state for the second signal transmission 420 than for the first signal transmission 410, so that the two can be transmitted using different beams. In a preferred embodiment, although the two TCI states are different, the second TCI state indicated for the second signal transmission 420 can be associated with the first TCI state of the first signal transmission 410. For example, the beam corresponding to the second TCI state can have the same direction as the beam corresponding to the first TCI state, but with a narrower width.

[0070] FIG4B shows a timing diagram for PDCCH transmission and Ap-CSI-RS transmission according to an embodiment of the present disclosure.

[0071] Conventionally, if there is no TCI field in the DCI of the first signal transmission (PDCCH transmission) 430, and the scheduling gap T2 between the first signal transmission 430 and the second signal transmission (Ap-CSI-RS transmission) 440 scheduled by the first signal transmission 430 is greater than the associated second time threshold set by TRP, then the TCI state and QCL assumptions associated with the second signal transmission 440 will typically follow the first signal transmission 430 (i.e., the second signal transmission 440 has a consistent TCI state with the first signal transmission 430).

[0072] However, according to an embodiment of the present disclosure, the TRP may indicate a different TCI state for the second signal transmission 440 than for the first signal transmission 430, so that the two can be transmitted using different beams. In a preferred embodiment, although the two TCI states are different, the second TCI state indicated for the second signal transmission 440 can be associated with the first TCI state of the first signal transmission 430. For example, the beam corresponding to the second TCI state can have the same direction as the beam corresponding to the first TCI state, but with a narrower width.

[0073] 2.2 Indicating different TCI states for the same type of signal transmission through different channels

[0074] According to an embodiment of the present disclosure, when the first signal transmission and the second signal transmission are associated with multiple signals of the same type passing through different channels, different TCI states may also be indicated for the first signal transmission and the second signal transmission.

[0075] In some embodiments of the present disclosure, the first signal transmission and the second signal transmission may be used to perform spatial diversity transmission of a downlink control signal. The spatial diversity transmission may include multiple downlink control signal transmissions associated with the same downlink control signal. The multiple downlink control signal transmissions may include at least the first signal transmission and the second signal transmission, and may also additionally include one or more additional transmissions of the same type. The multiple downlink control signal transmissions may be performed simultaneously. The multiple downlink control signal transmissions may correspond to different beams, each beam experiencing a corresponding channel. The channel conditions (e.g., channel quality) of these channels may be different. Through spatial diversity transmission of the downlink control signal, the coverage of the downlink control signal may be expanded and the reliability of the downlink control signal transmission may be improved. Since the multiple downlink control signal transmissions are associated with the same downlink control signal, each of the multiple downlink control signal transmissions may carry the same CORESET information. Since the channel conditions experienced by each downlink control signal transmission are different, a different TCI state may be indicated for each downlink control signal transmission.

[0076] FIG5A illustrates a schematic diagram of spatial diversity transmission according to an embodiment of the present disclosure. As shown in FIG5A , a TRP 510 may simultaneously transmit multiple downlink control signal transmissions 530, 540, and 550 associated with the same downlink control signal for reception by a UE 520. Each of the downlink control signal transmissions 530, 540, and 550 carries CORESET information (e.g., CORESET#A). The downlink control signal transmissions 530, 540, and 550 may each have an associated beam, which may have different directions. The UE 520 may receive the signal using the corresponding beam. Compared to using a single beam associated with a single downlink control signal transmission, spatial diversity transmission using multiple downlink control signal transmissions 530, 540, and 550 expands the coverage of the downlink control signal. For the multiple downlink control signal transmissions 530, 540, and 550 transmitted simultaneously, the TRP may indicate a different TCI state for each downlink control signal transmission. For example, the TRP may indicate TCI states A, B, and C for downlink control signal transmissions 530, 540, and 550, respectively.

[0077] According to an optional embodiment of the present disclosure, the TRP 510 may be configured to determine, based on the UE's capabilities, a set of TCI states that the UE can simultaneously process. The TRP 510 may then apply at least a subset of the TCI state groups to spatial diversity transmission of downlink control signals. For example, the TRP 510 may indicate different TCI states within a TCI state group for multiple downlink control signal transmissions for spatial diversity transmission.

[0078] Specifically, TRP 510 may receive an indication of UE capabilities from UE 520, which may indicate whether UE 520 supports reception of PDCCH spatial diversity transmissions.

[0079] Additionally, if UE 520 is capable of receiving PDCCH spatial diversity transmissions, TRP 510 may also receive a parameter M_max from UE 520. The value of this parameter M_max may indicate the maximum number of simultaneously active downlink TCI states allowed by UE 520. For example, UE 520 may report to TRP 510 that the maximum number of simultaneously active downlink TCI states is three. This means that multiple downlink control signal transmissions using spatial diversity transmissions may indicate a maximum of three different TCI states. The number parameter M_max may be reported to TRP 510 together with or separately from the aforementioned UE capability indication.

[0080] Additionally, the TRP 510 may also receive from the UE 520 a group of TCI states that the UE 520 can simultaneously receive. Each group of TCI states may describe multiple TCI states that the UE 520 can simultaneously receive (i.e., multiple beams associated with the multiple TCI states can be simultaneously received). As an example and not a limitation, for an example set of all TCI states {A, B, C, D, E, F}, the UE may indicate that TCI states {A, B, C} can be simultaneously received, TCI states {A, D, E} can be simultaneously received, and TCI states {B, D, F} cannot be simultaneously received. Accordingly, when spatial diversity transmission is performed, the TRP may indicate TCI states A, B, C (or A, D, E) for multiple downlink control signal transmissions, but not TCI states B, D, F. In one example, the UE 520 may report the group of TCI states that the UE 520 can simultaneously receive via group-based beam reporting within a single TRP.

[0081] According to an embodiment of the present disclosure, when spatial diversity transmission is used to send a downlink control signal, for a downlink data signal transmission (e.g., PDSCH) or a downlink pilot signal transmission (Ap-CSI-RS) associated with the downlink control signal (e.g., PDCCH), a default beam associated with the downlink data signal transmission or the downlink pilot signal transmission can be determined through a variety of configuration methods.

[0082] In one example, the default beam may be determined based on a predefined rule. Specifically, a specific beam may be selected from multiple beams used for spatial diversity transmission, where the specific beam has an activated TCI state with the smallest ID. Thus, the specific beam may be determined as the default beam.

[0083] In another example, the default beam can be determined based on signaling. For example, the signaling used to schedule spatial diversity transmission can additionally indicate the default beam associated with downlink data signal transmission or downlink pilot signal transmission. Specifically, the signaling (e.g., MAC CE and / or DCI) used to schedule multiple beams for spatial diversity transmission can include information for specifying the default beam.

[0084] According to an embodiment of the present disclosure, downlink data signal transmission (e.g., PDSCH) or downlink pilot signal transmission (Ap-CSI-RS) associated with a downlink control signal (e.g., PDCCH) may use the determined default beam, unless otherwise indicated.

[0085] In other embodiments of the present disclosure, the first signal transmission and the second signal transmission may be used to perform data channel spatial multiplexing of downlink data signals. The data signals may be divided into different spatial layers. Data channel spatial multiplexing may include using multiple downlink data signal transmissions to transmit multiple spatial layers to support high data rates. The multiple downlink data signal transmissions may include at least the first signal transmission and the second signal transmission. It will be appreciated that the multiple downlink data signal transmissions are not limited to two signal transmissions but may also include more than two signal transmissions of the same type. In some embodiments, each signal transmission in the multiple downlink data signal transmissions may include a spatial layer of the same type or a combination of multiple spatial layers. In some embodiments, data streams between layers within the multiple spatial layers within a downlink data signal transmission may be transmitted in parallel. In these embodiments, the multiple downlink data signal transmissions may correspond to different beams. Each beam may carry a different spatial layer (or combination of layers). Because each downlink data signal transmission may experience different channel conditions (e.g., channel quality), a different TCI state may be indicated for each downlink data signal transmission.

[0086] Figure 5B shows a schematic diagram of data channel spatial multiplexing according to an embodiment of the present disclosure. As shown in Figure 5B, TRP 510 can send multiple downlink data signal transmissions 560, 570 for reception by UE 520. Each downlink data signal transmission 560, 570 can carry a different spatial layer (or combination of layers). The downlink data signal transmissions 560, 570 can each have an associated beam. These beams can have different modulation and coding schemes (MCS), including different modulation, channel coding rates, power control, etc. In the example shown in Figure 5B, layers 1 and 2 of the PDSCH can share the same first MCS and be carried by the first downlink data channel transmission 560, while layers 3 and 4 of the PDSCH can share the same second MCS and be carried by the second downlink data channel transmission 570. This data channel spatial multiplexing can provide data transmission efficiency. Different TCI states can be indicated for the multiple downlink data signal transmissions 560, 570 sent. For example, TCI states D and E can be indicated for the downlink data signal transmissions 560, 570, respectively.

[0087] 2.3 Multiple TRP Scenario

[0088] The solution described above can be extended to a multi-TRP scenario. In a multi-TRP scenario, there may be multiple TRPs on the network side, and the multiple TRPs may collaboratively serve the same UE. For example, the first signal transmission and / or the second signal transmission performed by a single TRP may be jointly performed by multiple TRPs. Therefore, a special TCI status indication solution needs to be designed for the multi-TRP scenario.

[0089] Figures 6A-6D illustrate embodiments of a multi-TRP scenario according to embodiments of the present disclosure. In these embodiments, two TRPs exist on the network side, namely, TRP 610A and TRP 610B. Both TRP 610A and TRP 610B can communicate with UE 620. It should be understood that although two TRPs are shown, in other embodiments, more TRPs may exist without limitation.

[0090] According to an embodiment of the present disclosure, the second signal transmission may include a first transmission associated with TRP 610A and a second transmission associated with TRP 610B. According to an embodiment of the present disclosure, the first transmission and the second transmission in the second signal transmission may be of the same specific type. As previously discussed, the specific type may be any of the following: downlink data signal transmission; downlink aperiodic pilot signal transmission; uplink control signal transmission; or uplink aperiodic pilot signal transmission.

[0091] According to an embodiment of the present disclosure, a backhaul link 630 may exist between TRP 610A and TRP 610B. This backhaul link 630 allows TRP 610A and TRP 610B to operate cooperatively. When the first signal transmission is a downlink control signal transmission (e.g., a PDCCH transmission), whether the downlink control signal transmission can be transmitted solely by one of TRP 610A and TRP 610B may be determined based at least in part on the quality of the backhaul link 630 between TRP 610A and TRP 610B.

[0092] When backhaul link 630 has good quality (e.g., high reliability, high rate, and / or low latency), the first signal transmission can be transmitted solely by one of TRPs 610A and 610B. In this case, the first signal transmission can be a single downlink control signal transmission. This single downlink control signal transmission can simultaneously schedule one or more transmissions (e.g., the first transmission and the second transmission in the second signal transmission) of both TRPs 610A and 610B and UE 620. The other TRP does not need to perform additional downlink control signal transmissions.

[0093] In the embodiments of Figures 6A and 6C , a backhaul link 630 having good quality is shown by a solid line. By way of example and not limitation, the first signal transmission is shown as being performed by TRP 610A. It will be appreciated that in other embodiments, the first signal transmission may alternatively be performed by TRP 610B.

[0094] When the backhaul link 630 does not have good quality, each of TRPs 610A and 610B may each perform its corresponding downlink control signal transmission. Thus, the first signal transmission may include a first downlink control signal transmission performed by TRP 610A and a second downlink control signal transmission performed by TRP 610B. The first downlink control signal transmission may schedule one or more transmissions between TRP 610A and UE 620 (e.g., the first transmission in the second signal transmission), and the second downlink control signal transmission may schedule one or more transmissions between TRP 610B and UE 620 (e.g., the second transmission in the second signal transmission).

[0095] In the embodiments of Figures 6B and 6D, the backhaul link 630 that does not have good quality is shown by a dotted line. In this case, each TRP can perform its corresponding downlink control signal transmission.

[0096] In the embodiment of FIG6A , the first signal transmission is a single downlink control signal transmission (e.g., PDCCH) transmitted solely by 610A of TRP 610A and TRP 610B, while the second signal transmission includes a first downlink data signal transmission (e.g., PDSCH1) associated with TRP 610A and a second downlink data signal transmission (e.g., PDSCH2) associated with TRP 610B. According to embodiments of the present disclosure, different TCI states may be indicated for the first signal transmission, the first downlink data signal transmission, and the second downlink data signal transmission, respectively, as shown in Table 7.

[0097] Table 7

[0098] In an alternative embodiment (not shown), the first signal transmission is a single downlink control signal transmission (e.g., PDCCH) transmitted solely by TRP 610A, and the second signal transmission may include a first downlink pilot signal transmission (e.g., Ap-CSI-RS1) associated with TRP 610A and a second downlink pilot signal transmission (e.g., Ap-CSI-RS2) associated with TRP 610B. According to an embodiment of the present disclosure, different TCI states may be indicated for the first signal transmission, the first downlink pilot signal transmission, and the second downlink pilot signal transmission, as shown in Table 8.

[0099] Table 8

[0100] In another alternative embodiment (not shown), the first signal transmission is a single downlink control signal transmission (e.g., PDCCH) transmitted solely by TRP 610A, and the second signal transmission may include a first uplink data signal transmission (e.g., PUSCH1) associated with TRP 610A and a second uplink data signal transmission (e.g., PUSCH2) associated with TRP 610B. According to an embodiment of the present disclosure, different TCI states may be indicated for the first signal transmission, the first uplink data signal transmission, and the second uplink data signal transmission, respectively, as shown in Table 9.

[0101] Table 9

[0102] In another alternative embodiment (not shown), the first signal transmission is a single downlink control signal transmission (e.g., PDCCH) transmitted solely by TRP 610A, and the second signal transmission may include a first uplink pilot signal transmission (e.g., Ap-SRS1) associated with TRP 610A and a second uplink pilot signal transmission (e.g., Ap-SRS2) associated with TRP 610B. According to an embodiment of the present disclosure, different TCI states may be indicated for the first signal transmission, the first uplink pilot signal transmission, and the second uplink pilot signal transmission, as shown in Table 10.

[0103] Table 10

[0104] In the TCI status indication schemes described in Tables 7-10, the indication of the TCI status may be performed by the TRP 610A, or by another electronic device that controls the TRP 610A.

[0105] In the embodiment of Figure 6B, due to the poor quality of the backhaul link 630, the first signal transmission includes multiple downlink control signal transmissions associated with multiple TRPs. Specifically, the multiple downlink control signal transmissions include a first downlink control signal transmission associated with TRP 610A (e.g., PDCCH1) and a second downlink control signal transmission associated with TRP 610B (e.g., PDCCH2). The second signal transmission includes a first downlink data signal transmission associated with TRP 610A (e.g., PDSCH1) and a second downlink data signal transmission associated with TRP 610B (e.g., PDSCH2). The first downlink control signal transmission can schedule the first downlink data signal transmission, and the second downlink control signal transmission can schedule the second downlink data signal transmission. According to an embodiment of the present disclosure, different TCI states can be indicated for the first downlink control signal transmission, the second downlink control signal transmission, the first downlink data signal transmission, and the second downlink data signal transmission, respectively, as shown in Table 11.

[0106] Table 11

[0107] Compared to the embodiment shown in FIG6B , in an alternative embodiment (not shown), the second signal transmission may alternatively include a first downlink pilot signal transmission associated with TRP 610A (e.g., Ap-CSI-RS1) and a second downlink pilot signal transmission associated with TRP 610B (e.g., Ap-CSI-RS2). Table 12 shows the different TCI states indicated according to embodiments of the present disclosure.

[0108] Table 12

[0109] Compared to the embodiment shown in FIG6B , in another alternative embodiment (not shown), the second signal transmission may alternatively include a first uplink data signal transmission (e.g., PUSCH1) associated with TRP 610A and a second uplink data signal transmission (e.g., PUSCH2) associated with TRP 610B. Table 13 shows different TCI states indicated according to embodiments of the present disclosure.

[0110] Table 13

[0111] Compared to the embodiment shown in FIG6B , in yet another alternative embodiment (not shown), the second signal transmission may include a first uplink pilot signal transmission associated with TRP 610A (e.g., Ap-SRS1) and a second uplink pilot signal transmission associated with TRP 610B (e.g., Ap-SRS2). Table 13 shows the different TCI states indicated according to an embodiment of the present disclosure.

[0112] Table 14

[0113] According to a further embodiment of the present disclosure, in a multi-TRP scenario, a third signal transmission associated with the TRP may also be performed. For the third signal transmission, a third TCI state may be indicated. The third signal transmission may be of a different type than the first signal transmission and the second signal transmission. Accordingly, the third TCI state indicated for the third signal transmission may be different from the first TCI state indicated for the first signal transmission and the second TCI state indicated for the second signal transmission.

[0114] According to some embodiments of the present disclosure, the third signal transmission may be an uplink control signal transmission associated with the downlink data signal transmission. The uplink control signal transmission may include feedback information associated with the downlink data signal transmission. For example, the third signal transmission may be a PUCCH transmission associated with a PDSCH transmission. The PUCCH transmission may include information such as a hybrid automatic repeat request (HARQ). The HARQ information may be used to provide feedback to the TRP regarding the reception of the PDSCH transmission, such as a HARQ-ACK or a HARQ-NACK.

[0115] Figures 6C-6D show an embodiment of a multi-TRP scenario according to an embodiment of the present disclosure, where the third signal transmission includes a PUSCH transmission.

[0116] In the embodiment of FIG6C , similar to the embodiment of FIG6A , the first signal transmission is a single downlink control signal transmission (e.g., PDCCH) transmitted solely by TRP 610A of TRP 610A and TRP 610B, while the second signal transmission includes a first downlink data signal transmission (e.g., PDSCH1) associated with TRP 610A and a second downlink data signal transmission (e.g., PDSCH2) associated with TRP 610B. Since the backhaul link 630 between the two TRPs 610A and 610B has good quality, the third signal transmission may also include a single uplink control signal transmission (e.g., a single PUCCH) associated only with TRP 610A. The single uplink control signal transmission may include feedback information (e.g., HARQ information) associated with both the first downlink data signal transmission and the second downlink data signal transmission. The single uplink control signal transmission may be transmitted to only TRP 610A without being transmitted to TRP 610B. After receiving the single uplink control signal transmission, TRP 610A may notify TRP 610B of feedback information associated with the second downlink data signal transmission via backhaul link 630. According to an embodiment of the present disclosure, different TCI states may be indicated for the first signal transmission, the first downlink data signal transmission, the second downlink data signal transmission, and the third signal transmission, as shown in Table 15.

[0117] Table 15

[0118] In the embodiment of FIG. 6D , similar to the embodiment of FIG. 6B , the first signal transmission includes multiple downlink control signal transmissions, including a first downlink control signal transmission (e.g., PDCCH1) associated with TRP 610A and a second downlink control signal transmission (e.g., PDCCH2) associated with TRP 610B. The second signal transmission includes a first downlink data signal transmission (e.g., PDSCH1) associated with TRP 610A and a second downlink data signal transmission (e.g., PDSCH2) associated with TRP 610B. The first downlink control signal transmission schedules the first downlink data signal transmission, and the second downlink control signal transmission schedules the second downlink data signal transmission. Since the backhaul link 630 between the two TRPs 610A and 610B does not have good quality, the third signal transmission may include a first uplink control signal transmission (e.g., PUCCH1) associated with TRP 610A and a second uplink control signal transmission (e.g., PUCCH2) associated with TRP 610. The first uplink control signal transmission may include first feedback information (HARQ1) associated with the first downlink data signal transmission. The second uplink control signal transmission may include second feedback information (HARQ2) associated with the second downlink data signal transmission. The first uplink control signal transmission may be transmitted to TRP 610A, while the second uplink control signal transmission may be transmitted to TRP 610B. According to an embodiment of the present disclosure, different TCI states may be indicated for the first downlink control signal transmission, the second downlink control signal transmission, the first downlink data signal transmission, the second downlink data signal transmission, the first uplink control signal transmission, and the second uplink control signal transmission, as shown in Table 16.

[0119] Table 16

[0120] According to an embodiment of the present disclosure, in a multi-TRP scenario, the downlink data signal transmission sent by each TRP may also carry different spatial layers (or combinations of layers). For example, in the embodiments shown in Figures 6A and 6C, the first downlink data signal transmission sent by TRP 610A may carry layer 1 of the PDSCH, while the second downlink data signal transmission sent by TRP 610B may carry layer 2 of the PDSCH. In other embodiments, the first downlink data signal transmission and the second downlink data signal transmission may carry different other spatial layers.

[0121] 2.4 Indication Process for Multiple TCI Status

[0122] According to an embodiment of the present disclosure, multiple TCI states may be indicated as a unified TCI state group.

[0123] In some embodiments, how to indicate multiple different TCI states can be determined based on the capabilities of the UE. Specifically, the UE can report the capabilities of the UE to the TRP. In one embodiment, the UE can indicate to the TRP whether the UE supports multi-beam operation. In an additional embodiment, the UE can also indicate signal groups or channel groups to the TRP, each signal group can describe which signals can be combined together, and each channel group can describe which channels can be combined together. As an example, the UE can group downlink control signals (e.g., PDCCH) and downlink data signals (e.g., PDSCH) into the same group, thereby indicating to the TRP that downlink control signals and downlink data signals can be indicated simultaneously with different TCI states in multi-beam operation. It should be understood that the UE can also report one or more other signal groups or channel groups, and each signal group / channel group can contain other types of signal combinations or channel combinations.

[0124] According to an embodiment of the present disclosure, based on the capabilities reported by the UE, the TRP can use RRC parameters to enable multi-beam operation for each signal group / channel group. For this multi-beam operation, the UE can indicate different TCI states for different types of signals / different channels.

[0125] According to an embodiment of the present disclosure, different TCI states may be included in a unified TCI state group. The unified TCI state group may be indicated by various signaling methods.

[0126] In one embodiment, a unified TCI state group can be activated as a code point in the DCI through MAC CE signaling. The unified TCI state group can include multiple TCI states (e.g., {A, B, C}), so that the multiple TCI states can be activated at once. In this case, the DCI can be a regular DCI.

[0127] In another embodiment, the MAC CE may be conventional MAC CE signaling (which may be used to activate up to 8 TCI states), and the DCI may be modified to include a group of multiple TCI states, so that the multiple TCI states in a unified TCI state group may be activated at once.

[0128] The present disclosure provides a unified TCI state design scheme for multi-beam operation. The scheme can indicate different TCI states for different signal beams according to the role or purpose they achieve. Additionally, the scheme can also indicate different TCI states for the same type of signals passing through different channels. The present scheme is designed for two communication scenarios: single TRP and multiple TRPs. More specifically, the communication examples targeted by the present scheme include but are not limited to: simultaneous transmission of control signals and data signals; simultaneous transmission of control signals and pilot signals; simultaneous transmission of control signals, data signals and feedback signals; diversity transmission of control signals; spatial multiplexing of data signals; coordinated transmission of control signals under multiple TRPs; separate transmission of control signals under multiple TRPs, and feedback signals under multiple TRPs, etc.

[0129] 3. Application Examples

[0130] The technology disclosed herein can be applied to various products.

[0131] For example, the control-side electronic device according to the embodiments of the present disclosure may be implemented as various control devices / base stations or included in various control devices / base stations. For example, the transmitting device and the terminal device according to the embodiments of the present disclosure may be implemented as various terminal devices or included in various terminal devices.

[0132] For example, the control device / base station / TRP mentioned in this disclosure can be implemented as any type of base station, such as an eNB, such as a macro eNB and a small eNB. A small eNB can be an eNB that covers a cell smaller than a macro cell, such as a pico eNB, a micro eNB, and a home (femto) eNB. For another example, it can be implemented as a gNB, such as a macro gNB and a small gNB. A small gNB can be a gNB that covers a cell smaller than a macro cell, such as a pico gNB, a micro gNB, and a home (femto) gNB. Alternatively, the base station can be implemented as any other type of base station, such as a NodeB and a base transceiver station (BTS). A base station can include: a main body configured to control wireless communications (also called a base station device); and one or more remote radio heads (RRHs) located at a location different from the main body. In addition, the various types of terminals described below can all operate as a base station by temporarily or semi-permanently performing base station functions.

[0133] For example, the terminal devices mentioned in the present disclosure may be implemented as mobile terminals (such as smart phones, tablet personal computers (PCs), notebook PCs, portable game terminals, portable / dongle-type mobile routers, and digital camera devices) or vehicle-mounted terminals (such as car navigation devices) in some embodiments. The terminal device may also be implemented as a terminal that performs machine-to-machine (M2M) communication (also known as a machine-type communication (MTC) terminal). In addition, the terminal device may be a wireless communication module (such as an integrated circuit module comprising a single chip) installed on each of the above-mentioned terminals.

[0134] Application examples according to the present disclosure will be described below with reference to the accompanying drawings.

[0135] [Example about base stations]

[0136] It should be understood that the term "base station" in the present disclosure has the full breadth of its usual meaning and includes at least a wireless communication station used as part of a wireless communication system or radio system to facilitate communication. Examples of base stations may include, but are not limited to, the following: a base station may be one or both of a base transceiver station (BTS) and a base station controller (BSC) in a GSM system, one or both of a radio network controller (RNC) and a Node B in a WCDMA system, an eNB in ​​an LTE and LTE-Advanced system, or a corresponding network node in a future communication system (such as a gNB, eLTE eNB, etc. that may appear in a 5G communication system). Some of the functions in the base station of the present disclosure may also be implemented as an entity that has a control function for communication in D2D, M2M, and V2V communication scenarios, or as an entity that plays a spectrum coordination role in a cognitive radio communication scenario.

[0137] First example

[0138] FIG7 is a block diagram illustrating a first example of a schematic configuration of a gNB to which the techniques of this disclosure can be applied. The gNB 2100 includes multiple antennas 2110 and a base station device 2120. The base station device 2120 and each antenna 2110 can be connected to each other via an RF cable. In one implementation, the gNB 2100 (or base station device 2120) herein may correspond to the control-side electronic device described above.

[0139] Each antenna 2110 includes a single or multiple antenna elements (such as multiple antenna elements included in a multiple-input multiple-output (MIMO) antenna) and is used for base station device 2120 to transmit and receive wireless signals. As shown in Figure 7, gNB 2100 may include multiple antennas 2110. For example, multiple antennas 2110 may be compatible with multiple frequency bands used by gNB 2100.

[0140] The base station device 2120 includes a controller 2121 , a memory 2122 , a network interface 2123 , and a wireless communication interface 2125 .

[0141] The controller 2121 may be, for example, a CPU or a DSP, and operates various functions of the higher layers of the base station device 2120. For example, the controller 2121 determines the location information of a target terminal device in at least one terminal device based on the positioning information of at least one terminal device on the terminal side in the wireless communication system acquired by the wireless communication interface 2125 and the specific location configuration information of at least one terminal device. The controller 2121 may have a logical function of performing the following controls: the control may be, for example, radio resource control, radio bearer control, mobility management, access control, and scheduling. The control may be performed in conjunction with a nearby gNB or core network node. The memory 2122 includes RAM and ROM, and stores programs executed by the controller 2121 and various types of control data (such as a terminal list, transmission power data, and scheduling data).

[0142] The network interface 2123 is a communication interface for connecting the base station device 2120 to the core network 2124. The controller 2121 can communicate with the core network node or another gNB via the network interface 2123. In this case, the gNB 2100 and the core network node or other gNB can be connected to each other via a logical interface (such as an S1 interface and an X2 interface). The network interface 2123 can also be a wired communication interface or a wireless communication interface for wireless backhaul. If the network interface 2123 is a wireless communication interface, the network interface 2123 can use a higher frequency band for wireless communication than the frequency band used by the wireless communication interface 2125.

[0143] The wireless communication interface 2125 supports any cellular communication scheme, such as Long Term Evolution (LTE) and LTE-Advanced, and provides wireless connectivity to terminals located in the gNB 2100 cell via the antenna 2110. The wireless communication interface 2125 may typically include, for example, a baseband (BB) processor 2126 and RF circuitry 2127. The BB processor 2126 can perform various signal processing functions, such as encoding / decoding, modulation / demodulation, and multiplexing / demultiplexing, and performs various signal processing for layers such as Layer 1 (L1), Medium Access Control (MAC), Radio Link Control (RLC), and Packet Data Convergence Protocol (PDCP). In place of the controller 2121, the BB processor 2126 may perform some or all of the aforementioned logical functions. The BB processor 2126 may be a memory storing communication control programs, or a module including a processor configured to execute programs and associated circuitry. Program updates can modify the functionality of the BB processor 2126. This module may be a card or blade inserted into a slot in the base station device 2120. Alternatively, it may be a chip mounted on the card or blade. Meanwhile, the RF circuit 2127 may include, for example, a mixer, a filter, and an amplifier, and transmits and receives wireless signals via the antenna 2110. Although FIG7 shows an example in which one RF circuit 2127 is connected to one antenna 2110, the present disclosure is not limited to this illustration, and one RF circuit 2127 may be connected to multiple antennas 2110 at the same time.

[0144] As shown in Figure 7 , the wireless communication interface 2125 may include multiple BB processors 2126. For example, multiple BB processors 2126 may be compatible with multiple frequency bands used by the gNB 2100. As shown in Figure 7 , the wireless communication interface 2125 may include multiple RF circuits 2127. For example, multiple RF circuits 2127 may be compatible with multiple antenna elements. Although Figure 7 illustrates an example in which the wireless communication interface 2125 includes multiple BB processors 2126 and multiple RF circuits 2127, the wireless communication interface 2125 may also include a single BB processor 2126 or a single RF circuit 2127.

[0145] Second example

[0146] FIG8 is a block diagram illustrating a second example of a schematic configuration of a gNB to which the techniques of this disclosure can be applied. gNB 2200 includes multiple antennas 2210, RRHs 2220, and base station equipment 2230. RRHs 2220 and each antenna 2210 can be connected to each other via an RF cable. Base station equipment 2230 and RRHs 2220 can be connected to each other via a high-speed line such as an optical fiber cable. In one implementation, gNB 2200 (or base station equipment 2230) herein may correspond to the control-side electronic device described above.

[0147] Each antenna 2210 includes a single or multiple antenna elements (such as multiple antenna elements included in a MIMO antenna) and is used for RRH 2220 to transmit and receive wireless signals. As shown in Figure 8, gNB 2200 may include multiple antennas 2210. For example, multiple antennas 2210 may be compatible with multiple frequency bands used by gNB 2200.

[0148] Base station device 2230 includes a controller 2231, a memory 2232, a network interface 2233, a wireless communication interface 2234, and a connection interface 2236. Controller 2231, memory 2232, and network interface 2233 are the same as controller 2121, memory 2122, and network interface 2123 described with reference to FIG.

[0149] The wireless communication interface 2234 supports any cellular communication scheme (such as LTE and LTE-Advanced) and provides wireless communication to terminals located in the sector corresponding to the RRH 2220 via the RRH 2220 and the antenna 2210. The wireless communication interface 2234 may generally include, for example, a BB processor 2235. The BB processor 2235 is identical to the BB processor 2126 described with reference to FIG. 7 , except that the BB processor 2235 is connected to the RF circuit 2222 of the RRH 2220 via the connection interface 2236. As shown in FIG. 8 , the wireless communication interface 2234 may include multiple BB processors 2235. For example, the multiple BB processors 2235 may be compatible with multiple frequency bands used by the gNB 2200. Although FIG. 8 illustrates an example in which the wireless communication interface 2234 includes multiple BB processors 2235, the wireless communication interface 2234 may also include a single BB processor 2235.

[0150] The connection interface 2236 is an interface for connecting the base station device 2230 (wireless communication interface 2234) to the RRH 2220. The connection interface 2236 may also be a communication module for connecting the base station device 2230 (wireless communication interface 2234) to the RRH 2220 for communication in the high-speed line.

[0151] The RRH 2220 includes a connection interface 2223 and a wireless communication interface 2221 .

[0152] The connection interface 2223 is an interface for connecting the RRH 2220 (wireless communication interface 2221) to the base station device 2230. The connection interface 2223 may also be a communication module for communication in the above-mentioned high-speed line.

[0153] The wireless communication interface 2221 transmits and receives wireless signals via the antenna 2210. The wireless communication interface 2221 may generally include, for example, an RF circuit 2222. The RF circuit 2222 may include, for example, a mixer, a filter, and an amplifier, and transmits and receives wireless signals via the antenna 2210. Although FIG8 shows an example in which one RF circuit 2222 is connected to one antenna 2210, the present disclosure is not limited to this illustration, and one RF circuit 2222 may be connected to multiple antennas 2210 simultaneously.

[0154] As shown in FIG8 , the wireless communication interface 2221 may include multiple RF circuits 2222. For example, the multiple RF circuits 2222 may support multiple antenna elements. Although FIG8 shows an example in which the wireless communication interface 2221 includes multiple RF circuits 2222, the wireless communication interface 2221 may also include a single RF circuit 2222.

[0155] [Example of User Equipment / Terminal Equipment]

[0156] First example

[0157] 9 is a block diagram illustrating an example of a schematic configuration of a communication device 2300 (e.g., a smartphone, a contact, etc.) to which the technology of the present disclosure may be applied. The communication device 2300 includes a processor 2301, a memory 2302, a storage device 2303, an external connection interface 2304, a camera 2306, a sensor 2307, a microphone 2308, an input device 2309, a display device 2310, a speaker 2311, a wireless communication interface 2312, one or more antenna switches 2315, one or more antennas 2316, a bus 2317, a battery 2318, and an auxiliary controller 2319. In one implementation, the communication device 2300 (or processor 2301) herein may correspond to the aforementioned transmitting device or terminal-side electronic device.

[0158] The processor 2301 may be, for example, a CPU or a system on a chip (SoC), and controls the functions of the application layer and other layers of the communication device 2300. The memory 2302 includes RAM and ROM, and stores data and programs executed by the processor 2301. The storage device 2303 may include storage media such as semiconductor memories and hard disks. The external connection interface 2304 is an interface for connecting an external device (such as a memory card and a universal serial bus (USB) device) to the communication device 2300.

[0159] The camera 2306 includes an image sensor (such as a charge coupled device (CCD) and a complementary metal oxide semiconductor (CMOS)) and generates a captured image. The sensor 2307 may include a group of sensors such as a measurement sensor, a gyroscope sensor, a geomagnetic sensor, and an acceleration sensor. The microphone 2308 converts the sound input to the communication device 2300 into an audio signal. The input device 2309 includes, for example, a touch sensor, a keypad, a keyboard, a button, or a switch configured to detect a touch on the screen of the display device 2310, and receives an operation or information input from the user. The display device 2310 includes a screen (such as a liquid crystal display (LCD) and an organic light emitting diode (OLED) display) and displays the output image of the communication device 2300. The speaker 2311 converts the audio signal output from the communication device 2300 into sound.

[0160] The wireless communication interface 2312 supports any cellular communication scheme (such as LTE and LTE-Advanced) and performs wireless communications. The wireless communication interface 2312 may generally include, for example, a BB processor 2313 and an RF circuit 2314. The BB processor 2313 may perform, for example, encoding / decoding, modulation / demodulation, and multiplexing / demultiplexing, and perform various types of signal processing for wireless communication. Meanwhile, the RF circuit 2314 may include, for example, a mixer, a filter, and an amplifier, and transmit and receive wireless signals via an antenna 2316. The wireless communication interface 2312 may be a chip module on which the BB processor 2313 and the RF circuit 2314 are integrated. As shown in FIG9 , the wireless communication interface 2312 may include multiple BB processors 2313 and multiple RF circuits 2314. Although FIG9 shows an example in which the wireless communication interface 2312 includes multiple BB processors 2313 and multiple RF circuits 2314, the wireless communication interface 2312 may also include a single BB processor 2313 or a single RF circuit 2314.

[0161] In addition, in addition to the cellular communication scheme, the wireless communication interface 2312 can support other types of wireless communication schemes, such as a short-range wireless communication scheme, a near-field communication scheme, and a wireless local area network (LAN) scheme. In this case, the wireless communication interface 2312 can include a BB processor 2313 and an RF circuit 2314 for each wireless communication scheme.

[0162] Each of the antenna switches 2315 switches the connection destination of the antenna 2316 between a plurality of circuits (eg, circuits for different wireless communication schemes) included in the wireless communication interface 2312 .

[0163] Each of the antennas 2316 includes a single or multiple antenna elements (such as multiple antenna elements included in a MIMO antenna) and is used for transmitting and receiving wireless signals via the wireless communication interface 2312. As shown in FIG9, the communication device 2300 may include multiple antennas 2316. Although FIG9 shows an example in which the communication device 2300 includes multiple antennas 2316, the communication device 2300 may also include a single antenna 2316.

[0164] In addition, the communication device 2300 may include an antenna 2316 for each wireless communication scheme. In this case, the antenna switch 2315 may be omitted from the configuration of the communication device 2300.

[0165] The bus 2317 connects the processor 2301, the memory 2302, the storage device 2303, the external connection interface 2304, the camera 2306, the sensor 2307, the microphone 2308, the input device 2309, the display device 2310, the speaker 2311, the wireless communication interface 2312, and the auxiliary controller 2319. The battery 2318 supplies power to the various blocks of the communication device 2300 shown in FIG9 via a feeder line, which is partially shown as a dotted line in the figure. The auxiliary controller 2319 operates the minimum necessary functions of the communication device 2300, for example, in sleep mode.

[0166] Second example

[0167] Figure 10 is a block diagram showing an example of a schematic configuration of a car navigation device 2400 to which the technology of the present disclosure can be applied. The car navigation device 2400 includes a processor 2401, a memory 2402, a global positioning system (GPS) module 2404, a sensor 2405, a data interface 2406, a content player 2407, a storage medium interface 2408, an input device 2409, a display device 2510, a speaker 2411, a wireless communication interface 2413, one or more antenna switches 2416, one or more antennas 2417, and a battery 2418. In one implementation, the car navigation device 2400 (or processor 2401) herein may correspond to a transmitting device or a terminal-side electronic device.

[0168] The processor 2401 may be, for example, a CPU or an SoC, and controls a navigation function and other functions of the car navigation apparatus 2400. The memory 2402 includes a RAM and a ROM, and stores data and programs executed by the processor 2401.

[0169] The GPS module 2404 uses GPS signals received from GPS satellites to measure the position (such as latitude, longitude, and altitude) of the car navigation device 2400. The sensor 2405 may include a group of sensors such as a gyroscope sensor, a geomagnetic sensor, and an air pressure sensor. The data interface 2406 is connected to, for example, the vehicle network 2421 via a terminal not shown, and acquires data generated by the vehicle (such as vehicle speed data).

[0170] The content player 2407 reproduces content stored in a storage medium (such as a CD or DVD) inserted into the storage medium interface 2408. The input device 2409 includes, for example, a touch sensor, button, or switch configured to detect a touch on the screen of the display device 2510, and receives an operation or information input from the user. The display device 2510 includes a screen such as an LCD or OLED display and displays an image of a navigation function or reproduced content. The speaker 2411 outputs the sound of the navigation function or the reproduced content.

[0171] The wireless communication interface 2413 supports any cellular communication scheme (such as LTE and LTE-Advanced) and performs wireless communication. The wireless communication interface 2413 may generally include, for example, a BB processor 2414 and an RF circuit 2415. The BB processor 2414 may perform, for example, encoding / decoding, modulation / demodulation, and multiplexing / demultiplexing, and perform various types of signal processing for wireless communication. Meanwhile, the RF circuit 2415 may include, for example, a mixer, a filter, and an amplifier, and transmit and receive wireless signals via an antenna 2417. The wireless communication interface 2413 may also be a chip module on which the BB processor 2414 and the RF circuit 2415 are integrated. As shown in Figure 10, the wireless communication interface 2413 may include multiple BB processors 2414 and multiple RF circuits 2415. Although Figure 10 shows an example in which the wireless communication interface 2413 includes multiple BB processors 2414 and multiple RF circuits 2415, the wireless communication interface 2413 may also include a single BB processor 2414 or a single RF circuit 2415.

[0172] In addition, in addition to the cellular communication scheme, the wireless communication interface 2413 can support other types of wireless communication schemes, such as short-range wireless communication schemes, near field communication schemes, and wireless LAN schemes. In this case, for each wireless communication scheme, the wireless communication interface 2413 can include a BB processor 2414 and an RF circuit 2415.

[0173] Each of the antenna switches 2416 switches the connection destination of the antenna 2417 between a plurality of circuits included in the wireless communication interface 2413 , such as circuits for different wireless communication schemes.

[0174] Each of the antennas 2417 includes a single or multiple antenna elements (such as multiple antenna elements included in a MIMO antenna) and is used for transmitting and receiving wireless signals with the wireless communication interface 2413. As shown in Figure 10, the car navigation device 2400 may include multiple antennas 2417. Although Figure 10 shows an example in which the car navigation device 2400 includes multiple antennas 2417, the car navigation device 2400 may also include a single antenna 2417.

[0175] In addition, the car navigation device 2400 may include an antenna 2417 for each wireless communication scheme. In this case, the antenna switch 2416 may be omitted from the configuration of the car navigation device 2400.

[0176] The battery 2418 supplies power to the respective blocks of the car navigation device 2400 shown in Fig. 10 via a feeder line, which is partially shown as a dotted line in the figure. The battery 2418 accumulates the power supplied from the vehicle.

[0177] The technology of the present disclosure can also be implemented as an in-vehicle system (or vehicle) 2420 including a car navigation device 2400, an in-vehicle network 2421, and one or more blocks of a vehicle module 2422. The vehicle module 2422 generates vehicle data (such as vehicle speed, engine speed, and fault information) and outputs the generated data to the in-vehicle network 2421.

[0178] The exemplary embodiments of the present disclosure are described above with reference to the accompanying drawings, but the present disclosure is certainly not limited to the above examples. Those skilled in the art may obtain various changes and modifications within the scope of the appended claims, and it should be understood that these changes and modifications will naturally fall within the technical scope of the present disclosure.

[0179] It should be understood that the machine-executable instructions in the machine-readable storage medium or program product according to the embodiments of the present disclosure can be configured to perform operations corresponding to the above-mentioned device and method embodiments. When referring to the above-mentioned device and method embodiments, the embodiments of the machine-readable storage medium or program product are clear to those skilled in the art and are therefore not described again. Machine-readable storage media and program products for carrying or including the above-mentioned machine-executable instructions also fall within the scope of the present disclosure. Such storage media may include, but are not limited to, floppy disks, optical disks, magneto-optical disks, memory cards, memory sticks, and the like.

[0180] In addition, it should be understood that the above series of processes and devices can also be implemented by software and / or firmware. In the case of implementation by software and / or firmware, the storage medium of the relevant device stores the corresponding program constituting the corresponding software, and when the program is executed, various functions can be performed.

[0181] For example, a plurality of functions included in one unit in the above embodiments may be implemented by separate devices. Alternatively, a plurality of functions implemented by a plurality of units in the above embodiments may be implemented by separate devices, respectively. In addition, one of the above functions may be implemented by a plurality of units. Needless to say, such a configuration is included in the technical scope of the present disclosure.

[0182] In this specification, the steps described in the flowchart include not only processing that is performed in order in time series, but also processing that is performed in parallel or individually rather than necessarily in time series. In addition, even in the steps processed in time series, it goes without saying that the order can be appropriately changed.

[0183] 4. Implementation of the exemplary embodiments of the present disclosure

[0184] According to the embodiments of the present disclosure, various exemplary implementations of the concepts of the present disclosure can be envisioned, including but not limited to:

[0185] 1. An electronic device for a network side, wherein the electronic device comprises:

[0186] a processing circuit, the processing circuit being configured to:

[0187] For a first signal transmission associated with a transmission reception point TRP, indicating a first TCI state;

[0188] for a second signal transmission associated with the TRP, indicating a second TCI state;

[0189] The first signal transmission and the second signal transmission have different signal types or experiences.

[0190] Different channel conditions,

[0191] The first TCI state is different from the second TCI state.

[0192] 2. The electronic device according to embodiment 1, wherein:

[0193] The first signal transmission is a downlink control signal transmission, and the second signal transmission is one of the following items associated with the downlink control signal transmission:

[0194] Data signal transmission;

[0195] Pilot signal transmission.

[0196] 3. The electronic device according to embodiment 2, wherein the data signal transmission is one of the following items associated with the downlink control signal transmission:

[0197] Downlink data signal transmission; or

[0198] Uplink data signal transmission.

[0199] 4. The electronic device according to embodiment 2, wherein the pilot signal transmission is one of the following items associated with the downlink control signal transmission:

[0200] Downlink aperiodic pilot signal transmission; or

[0201] Uplink non-periodic pilot signal transmission.

[0202] 5. The electronic device according to embodiment 3, wherein:

[0203] The first TCI state is associated with a first beam pair;

[0204] The second TCI state is associated with a second beam pair;

[0205] The second beam is narrower than the first beam.

[0206] 6. The electronic device according to embodiment 3, wherein:

[0207] A scheduling gap between the first signal transmission and the second signal transmission is greater than a predetermined time threshold.

[0208] 7. The electronic device according to embodiment 2, wherein the processing circuit is further configured to:

[0209] for a third signal transmission associated with the TRP, indicating a third TCI state;

[0210] The third TCI state is different from the first TCI state and the second TCI state.

[0211] 8. The electronic device according to embodiment 7, wherein:

[0212] The second signal transmission is a downlink data signal transmission associated with the downlink control signal transmission, and

[0213] The third signal transmission is an uplink control signal transmission associated with the downlink data signal transmission, and the uplink control signal transmission includes feedback information associated with the downlink data signal transmission.

[0214] 9. The electronic device according to embodiment 7, wherein:

[0215] The second signal transmission is a downlink aperiodic pilot signal transmission associated with the downlink control signal transmission,

[0216] The third signal transmission is an uplink aperiodic pilot signal transmission associated with the downlink control signal transmission.

[0217] 10. An electronic device as described in Example 1, wherein the first signal transmission and the second signal transmission are used to perform spatial diversity transmission of a downlink control signal, the spatial diversity transmission includes multiple downlink control signal transmissions, the multiple downlink control signal transmissions correspond to different multiple beams, the multiple downlink control signal transmissions carry the same CORESET information, and the multiple downlink control signal transmissions include the first signal transmission and the second signal transmission.

[0218] 11. The electronic device according to embodiment 10, wherein the processing circuit is further configured to:

[0219] For downlink data signal transmission or downlink pilot signal transmission associated with the downlink control signal, a default beam for the downlink data signal transmission or the downlink pilot signal transmission is determined based on one of the following two configurations:

[0220] a first configuration, wherein the default beam is determined to be a beam in an activated TCI state with a smallest ID among the plurality of beams;

[0221] In the second configuration, the signaling used to schedule the multiple beams includes information for specifying the default beam.

[0222] 12. The electronic device according to embodiment 10, wherein the processing circuit is further configured to:

[0223] Determining, based on the capabilities of the UE, a TCI state group that the UE can simultaneously process; and

[0224] At least a subset of the TCI state group is applied to the spatial diversity transmission of a downlink control signal.

[0225] 13. An electronic device as described in Example 1, wherein the first signal transmission and the second signal transmission are used to perform data channel spatial multiplexing of downlink data signals, the data channel spatial multiplexing includes using multiple spatial layers to perform multiple downlink data signal transmissions, the multiple downlink data signal transmissions correspond to different multiple beams, and the multiple downlink data signal transmissions include the first signal transmission and the second signal transmission.

[0226] 14. The electronic device according to embodiment 1, wherein:

[0227] The TRP includes at least a first TRP and a second TRP,

[0228] The second signal transmission includes a first transmission of a specific type associated with the first TRP and a second transmission of a specific type associated with the second TRP.

[0229] 15. The electronic device of embodiment 14, wherein the processing circuit is further configured to:

[0230] Based at least in part on the quality of the backhaul link between the first TRP and the second TRP, determine whether the first signal transmission is transmitted solely by one of the first TRP and the second TRP.

[0231] 16. The electronic device according to embodiment 15, wherein:

[0232] The first signal transmission is a single downlink control signal transmission transmitted solely by one of the first TRP and the second TRP, the single downlink control signal transmission scheduling both the first transmission of the specific type and the second transmission of the specific type,

[0233] The processing circuit is configured to indicate different TCI states for the first signal transmission, the first transmission of the specific type, and the second transmission of the specific type, respectively.

[0234] 17. The electronic device according to embodiment 15, wherein:

[0235] The first signal transmission includes a plurality of downlink control signal transmissions, the plurality of downlink control signal transmissions including a first downlink control signal transmission associated with the first TRP and a second downlink control signal transmission associated with the second TRP,

[0236] The first downlink control signal transmission schedules the first transmission of the specific type,

[0237] The second downlink control signal transmission schedules the second transmission of the specific type,

[0238] The processing circuit is configured to indicate different TCI states for the first downlink control signal transmission, the second downlink control signal transmission, the first transmission of the specific type, and the second transmission of the specific type, respectively.

[0239] 18. The electronic device according to embodiment 14, wherein the second signal transmission is one of the following items associated with the downlink control signal transmission:

[0240] Downlink data signal transmission;

[0241] Downlink aperiodic pilot signal transmission;

[0242] Uplink data signal transmission;

[0243] Uplink non-periodic pilot signal transmission.

[0244] 19. The electronic device according to embodiment 14, wherein the processing circuit is further configured to:

[0245] for a third signal transmission associated with the TRP, indicating a third TCI state;

[0246] The third TCI state is different from the TCI state of the first signal transmission and the TCI state of the second signal transmission.

[0247] 20. The electronic device according to embodiment 19, wherein:

[0248] The third signal transmission includes a single uplink control signal transmission associated with the first TRP, the single uplink control signal transmission including feedback information associated with both the first transmission of the specific type and the second transmission of the specific type,

[0249] The processing circuit is configured to indicate different TCI states for the first signal transmission, the first transmission of the specific type, the second transmission of the specific type, and the third signal transmission.

[0250] 21. The electronic device according to embodiment 19, wherein:

[0251] The third signal transmission includes a first uplink control signal transmission associated with the first TRP and a second uplink control signal transmission associated with the second TRP,

[0252] The first uplink control signal transmission includes first feedback information associated with the first transmission of the specific type,

[0253] The second uplink control signal transmission includes second feedback information associated with the second transmission of the specific type;

[0254] The processing circuit is configured to indicate different TCI states for the first signal transmission, the second signal transmission, the first uplink control signal transmission, and the second uplink control signal transmission.

[0255] 22. A method performed on a network side of a wireless communication system, wherein the method comprises:

[0256] For a first signal transmission associated with a transmitting / receiving node TRP, indicating a first TCI state;

[0257] for a second signal transmission associated with the TRP, indicating a second TCI state;

[0258] The first signal transmission and the second signal transmission have different signal types or different

[0259] Channel,

[0260] The first TCI state is different from the second TCI state.

[0261] 23. A computer program product comprising a computer program, wherein when the computer program is executed by a computer, the computer is caused to perform the method according to embodiment 22.

[0262] 24. A non-transitory computer-readable storage medium storing computer program instructions, wherein when the computer program instructions are executed by one or more processors, the one or more processors are caused to perform the method of embodiment 22.

[0263] 25. An apparatus comprising means for performing the method of embodiment 22.

Claims

1. An electronic device for a network side, characterized in that: The electronic device comprises: a processing circuit, the processing circuit being configured to: For a first signal transmission associated with a transmission reception point TRP, indicating a first TCI state; for a second signal transmission associated with the TRP, indicating a second TCI state; The first signal transmission and the second signal transmission have different signal types or experience different channel conditions, The first TCI state is different from the second TCI state.

2. The electronic device according to claim 1, wherein: The first signal transmission is a downlink control signal transmission, and the second signal transmission is one of the following items associated with the downlink control signal transmission: Data signal transmission; Pilot signal transmission.

3. The electronic device according to claim 2, wherein: The data signal transmission is one of the following items associated with the downlink control signal transmission: Downlink data signal transmission; or Uplink data signal transmission.

4. The electronic device according to claim 2, wherein: The pilot signal transmission is one of the following items associated with the downlink control signal transmission: Downlink aperiodic pilot signal transmission; or Uplink non-periodic pilot signal transmission.

5. The electronic device according to claim 3, wherein: The first TCI state is associated with a first beam pair; The second TCI state is associated with a second beam pair; The second beam is narrower than the first beam.

6. The electronic device according to claim 3, wherein: A scheduling gap between the first signal transmission and the second signal transmission is greater than a predetermined time threshold.

7. The electronic device according to claim 2, wherein: The processing circuit is further configured to: for a third signal transmission associated with the TRP, indicating a third TCI state; The third TCI state is different from the first TCI state and the second TCI state.

8. The electronic device according to claim 7, wherein: The second signal transmission is a downlink data signal transmission associated with the downlink control signal transmission, and the third signal transmission is an uplink control signal transmission associated with the downlink data signal transmission, wherein the uplink control signal transmission includes feedback information associated with the downlink data signal transmission.

9. The electronic device according to claim 7, wherein: The second signal transmission is a downlink aperiodic pilot signal transmission associated with the downlink control signal transmission, The third signal transmission is an uplink aperiodic pilot signal transmission associated with the downlink control signal transmission.

10. The electronic device according to claim 1, wherein The first signal transmission and the second signal transmission are used to perform spatial diversity transmission of a downlink control signal, the spatial diversity transmission including multiple downlink control signal transmissions, the multiple downlink control signal transmissions corresponding to different multiple beams, the multiple downlink control signal transmissions carrying the same CORESET information, and the multiple downlink control signal transmissions including the first signal transmission and the second signal transmission.

11. The electronic device according to claim 10, wherein: The processing circuit is further configured to: For downlink data signal transmission or downlink pilot signal transmission associated with the downlink control signal, a default beam for the downlink data signal transmission or the downlink pilot signal transmission is determined based on one of the following two configurations: a first configuration, wherein the default beam is determined to be a beam in an activated TCI state with a smallest ID among the plurality of beams; In the second configuration, the signaling used to schedule the multiple beams includes information for specifying the default beam.

12. The electronic device according to claim 10, wherein: The processing circuit is further configured to: Determining, based on the capability of the UE, a TCI state group that the UE can simultaneously process; and At least a subset of the TCI state group is applied to the spatial diversity transmission of a downlink control signal.

13. The electronic device according to claim 1, wherein The first signal transmission and the second signal transmission are used to perform data channel spatial multiplexing of a downlink data signal, wherein the data channel spatial multiplexing includes using multiple spatial layers to perform multiple downlink data signal transmissions, the multiple downlink data signal transmissions correspond to different multiple beams, and the multiple downlink data signal transmissions include the first signal transmission and the second signal transmission.

14. The electronic device of claim 1, wherein: The TRP includes at least a first TRP and a second TRP, The second signal transmission includes a first transmission of a specific type associated with the first TRP and a second transmission of a specific type associated with the second TRP.

15. The electronic device according to claim 14, wherein The processing circuit is further configured to: Based at least in part on the quality of the backhaul link between the first TRP and the second TRP, determine whether the first signal transmission is transmitted solely by one of the first TRP and the second TRP.

16. The electronic device of claim 15, wherein: The first signal transmission is a single downlink control signal transmission transmitted solely by one of the first TRP and the second TRP, the single downlink control signal transmission scheduling both the first transmission of the specific type and the second transmission of the specific type, The processing circuit is configured to indicate different TCI states for the first signal transmission, the first transmission of the specific type, and the second transmission of the specific type, respectively.

17. The electronic device of claim 15, wherein: The first signal transmission includes multiple downlink control signal transmissions, and the multiple downlink control signal transmissions include a first downlink control signal transmission associated with the first TRP and a second downlink control signal transmission associated with the second TRP, The first downlink control signal transmission schedules the first transmission of the specific type, The second downlink control signal transmission schedules the second transmission of the specific type, The processing circuit is configured to indicate different TCI states for the first downlink control signal transmission, the second downlink control signal transmission, the first transmission of the specific type, and the second transmission of the specific type, respectively.

18. The electronic device according to claim 14, wherein: The second signal transmission is one of the following items associated with the downlink control signal transmission: Downlink data signal transmission; Downlink aperiodic pilot signal transmission; Uplink data signal transmission; Uplink non-periodic pilot signal transmission.

19. The electronic device according to claim 14, wherein: The processing circuit is further configured to: for a third signal transmission associated with the TRP, indicating a third TCI state; The third TCI state is different from the TCI state of the first signal transmission and the TCI state of the second signal transmission.

20. The electronic device of claim 19, wherein: The third signal transmission includes a single uplink control signal transmission associated with the first TRP, the single uplink control signal transmission including feedback information associated with both the first transmission of the specific type and the second transmission of the specific type, The processing circuit is configured to indicate different TCI states for the first signal transmission, the first transmission of the specific type, the second transmission of the specific type, and the third signal transmission.

21. The electronic device of claim 19, wherein: The third signal transmission includes a first uplink control signal transmission associated with the first TRP and a second uplink control signal transmission associated with the second TRP, The first uplink control signal transmission includes first feedback information associated with the first transmission of the specific type, The second uplink control signal transmission includes second feedback information associated with the second transmission of the specific type; The processing circuit is configured to indicate different TCI states for the first signal transmission, the second signal transmission, the first uplink control signal transmission, and the second uplink control signal transmission.

22. A method performed on a network side of a wireless communication system, wherein: The method comprises: For a first signal transmission associated with a transmitting / receiving node TRP, indicating a first TCI state; for a second signal transmission associated with the TRP, indicating a second TCI state; The first signal transmission and the second signal transmission have different signal types or different channels, The first TCI state is different from the second TCI state.

23. A computer program product comprising a computer program which, when executed by a computer, causes the computer to perform the method according to claim 22.

24. A non-transitory computer-readable storage medium storing computer program instructions, which, when executed by one or more processors, cause the one or more processors to perform the method of claim 22.

25. An apparatus comprising means for performing the method of claim 22.

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