Update the active TCI status of multi-TRP PDSCH based on a single PDCCH or multi-TRP PDSCH based on multiple PDCCHs.

Abstract

Disclosed herein are systems and methods for updating active transmission configuration indication (TCI) states for single or multi-physical downlink control channel (PDCCH) based multi-transmission / reception point (TRP) physical downlink shared channel (PDSCH) transmissions. In one embodiment, a method performed by a wireless communication device includes receiving a medium access control (MAC) control element (CE) including information that: activates one or more TCI states for a particular serving cell and / or bandwidth part (BWP) of the wireless communication device, the particular serving cell and / or BWP being configured for multi-PDCCH based multi-PDSCH transmissions; and maps at most one of the activated TCI states to each codepoint of a downlink control information (DCI) TCI field. The method further includes receiving a PDCCH including a DCI in which the DCI TCI is set to a particular codepoint; and determining the activated TCI state for a PDSCH scheduled by the DCI based on information included in the DCI.

Description

[0001] Related applications

[0002] This application claims the benefit of provisional patent application No. 62 / 933,049, filed on November 8, 2019, the disclosure of which is hereby incorporated herein by reference in its entirety. Technical Field

[0003] This disclosure relates to cellular communication systems, and specifically to the activation and deactivation of transmission configuration indication states in cellular communication systems. Background Technology

[0004] Next-generation mobile wireless communication systems (5G), or New Radio (NR), support a range of different use cases and deployment scenarios. NR uses Cyclic Prefix Orthogonal Frequency Division Multiplexing (CP-OFDM) in the downlink (i.e., from network nodes, gNBs, eNBs, or base stations to user equipment or UEs), and both CP-OFDM and Discrete Fourier Transform (DFT)-Extended Orthogonal Frequency Division Multiplexing (OFDM) (DFT-S-OFDM) in the uplink (i.e., from UE to gNB). In the time domain, NR downlink and uplink physical resources are organized into equal-sized subframes of 1 millisecond (ms). These subframes are further divided into multiple time slots of equal duration.

[0005] The slot length depends on the subcarrier spacing. For a subcarrier spacing of Δf = 15 kHz, there is only one slot per subframe, and each slot typically consists of 14 OFDM symbols, regardless of the subcarrier spacing.

[0006] Typical data scheduling in NR is based on time slots. Figure 1 The example shown is an NR time-domain structure with a 15 kHz subcarrier spacing, where the first two symbols contain the Physical Downlink Control Channel (PDCCH) and the remaining twelve symbols contain the Physical Data Channel (PDCH), which is either the Physical Downlink Shared Channel (PDSCH) (which is the Physical Downlink Data Channel) or the Physical Uplink Shared Channel (PUSCH) (which is the Physical Uplink Data Channel).

[0007] Different subcarrier spacing values ​​are supported in NR. The supported subcarrier spacing values ​​(also known as different parameter sets (numerology)) are determined by Δf = (15 × 2) α Given α kHz, where α is a non-negative integer. Δf = 15 kHz is the basic subcarrier spacing also used in LTE. The slot duration for different subcarrier spacings is... Figure 2 As shown in the image.

[0008] In the frequency domain physical resource definition, the system bandwidth is divided into resource blocks (RBs), each corresponding to twelve consecutive subcarriers. Common RBs (CRBs) are numbered starting from 0 at one end of the system bandwidth. A UE is configured with one or more up to four bandwidth portions (BWPs), which can be a subset of the RBs supported on the carrier. Therefore, a BWP can start with a CRB greater than zero. All configured BWPs have a common reference, which is CRB 0. Thus, a UE can be configured with a narrow BWP (e.g., 10 MHz) and a wide BWP (e.g., 100 MHz), but at a given point in time, only one BWP can be active for that UE. Physical RBs (PRBs) are numbered from 0 to N-1 within a BWP, but the 0th PRB can therefore be the Kth CRB, where K > 0.

[0009] Figure 3 The diagram shows the basic NR physical time-frequency resource grid, with only one RB shown within a 14-symbol slot. One OFDM subcarrier during one OFDM symbol interval forms one resource element (RE).

[0010] Downlink transmission can be dynamically scheduled. In each time slot, the gNB transmits downlink control information (DCI) on the Physical Downlink Control Channel (PDCCH). This DCI specifies which UE the data should be transmitted to and on which RBs (RBs) within the current downlink time slot. In NR, the PDCCH is typically transmitted in the first one or two OFDM symbols of each time slot. UE data is carried on the PDSCH. The UE first detects and decodes the PDCCH, and if decoding is successful, it decodes the corresponding PDSCH based on the control information decoded in the PDCCH.

[0011] The PDCCH can also be used to dynamically schedule uplink data transmission. Similar to the downlink, the UE first decodes the uplink permission in the PDCCH, and then transmits data through the PUSCH based on the control information (such as modulation order, decoding rate, uplink resource allocation, etc.) decoded in the uplink permission.

[0012] Several signals can be transmitted from different antenna ports from the same base station antenna. When measured at the receiver, these signals can have the same large-scale characteristics, such as in terms of Doppler frequency shift / spread, average delay spread, or average delay. Therefore, these antenna ports are referred to as quasi-common localization (QCL).

[0013] The network can then signal to the UE that both antenna ports are QCL. If the UE knows that both antenna ports are QCL with respect to a certain parameter (e.g., Doppler spread), the UE can estimate that parameter based on a reference signal transmitted from one of the antenna ports and use that estimate when receiving another reference signal or physical channel from the other antenna port. Typically, the first antenna port is represented by a measurement reference signal such as a Channel State Information Reference Signal (CSI-RS) (called the Source Reference Signal (RS)), and the second antenna port is represented by a Demodulation Reference Signal (DMRS) received for PDSCH or PDCCH (called the Target RS).

[0014] For example, if antenna ports A and B have a QCL with respect to average delay, then the UE can estimate the average delay based on the signal received from antenna port A (called the source RS) and assume that the signal received from antenna port B (the target RS) has the same average delay. This is useful for demodulation because when attempting to measure the channel using DMRS, the UE can know the characteristics of the channel in advance, which can help the UE, for example, select an appropriate channel estimation filter.

[0015] The network signals to the UE about what assumptions can be made regarding QCL. In NR, four types of QCL relationships are defined between the transmitted source RS and the transmitted destination RS:

[0016] • Type A: {Doppler frequency shift, Doppler spread, average delay, delay spread}

[0017] • Type B: {Doppler frequency shift, Doppler spread}

[0018] • Type C: {Average Delay, Doppler Shift}

[0019] • Type D: {Space Rx parameter}

[0020] QCL type D was introduced to facilitate beam management using analog beamforming and is known as spatial QCL. Currently, there is no strict definition of spatial QCL, but the understanding is that if two transmitting antenna ports are spatially QCL, then the UE can use the same receive (Rx) beam to receive them. This is helpful for UEs using analog beamforming to receive signals, as the UE needs to adjust its Rx beam in a certain direction before receiving a signal. If the UE knows that the signal is spatially QCL with some other signals it has previously received, then it can safely use the same Rx beam to receive that signal as well. Note that this discussion focuses primarily on QCL type D for beam management, but it is also necessary to communicate the RS type A QCL relationship to the UE so that the UE can estimate all relevant large-scale parameters.

[0021] Typically, this is achieved by configuring the UE with a CSI-RS (TRS) for tracking to estimate the time / frequency offset. In order to use any QCL reference, the UE must receive it with a sufficiently good signal-to-interference-plus-noise ratio (SINR). In many cases, this means that the TRS must be transmitted to a UE within the appropriate beam.

[0022] To introduce dynamism in beam and transmit / receive point (TRP) selection, the UE can be configured via radio resource control (RRC) signaling with M TCI states, where, depending on the UE's capabilities, M is up to 128 in frequency range 2 (FR2) for PDSCH reception purposes and up to 8 in frequency range 1 (FR1).

[0023] Each TCI state contains QCL information, namely one or two source downlink (DL) RSs, each associated with a QCL type. For example, a TCI state contains a pair of reference signals, each associated with a QCL type, such as two distinct CSI-RSs {CSI-RS1, CSI-RS2} configured in the TCI state as {qcl-type1, qcl-type2} = {type A, type D}. This means that the UE can derive Doppler shift, Doppler spread, average delay, and delay spread from CSI-RS1, and derive the spatial Rx parameters (i.e., the Rx beam to be used) from CSI-RS2.

[0024] Each of the M states in the TCI state list can be interpreted as a list of M possible beams transmitted from the network or a list of M possible TRPs used by the network to communicate with the UE. The M TCI states can also be interpreted as a combination of one or more beams transmitted from one or more TRPs.

[0025] A first list of available TCI states is configured for the PDSCH, and a second list of TCI states is configured for the PDCCH. Each TCI state contains a pointer to another TCI state, called the TCI state ID. The network then activates one TCI state for the PDCCH (i.e., provides a TCI for the PDCCH) and up to eight TCI states for the PDSCH via a Media Access Control (MAC) control element (CE). The number of active TCI states supported by the UE is its capability, but the maximum value is eight.

[0026] Each configured TCI state contains parameters for quasi-co-location association between the source reference signal (CSI-RS or synchronization signal (SS) / physical broadcast channel (PBCH)) and the target reference signal (e.g., PDSCH / PDCCH DMRS port). The TCI state is also used to convey QCL information for receiving CSI-RS.

[0027] Suppose that the UE is configured with four active TCI states from a list of sixty-four (64) configured TCI states. Therefore, for that particular UE, sixty (60) TCI states are inactive (but some may be active for another UE), and the UE does not need to be prepared with the large-scale parameters estimated for these TCI states. However, the UE continuously tracks and updates the large-scale parameters of the four active TCI states by measuring and analyzing the source RS indicated by each TCI state. When a PDSCH is scheduled to the UE, the DCI contains a pointer to an active TCI. The UE then knows which large-scale parameter estimate to use when performing PDSCHDMRS channel estimation and therefore PDSCH demodulation.

[0028] DMRS (also referred to herein as "DM-RS") is used for coherent demodulation of physical layer data channels PDSCH (DL) and PUSCH (UL), as well as coherent demodulation of PDCCH. DMRS is constrained by resource blocks carrying associated physical layer channels and is mapped onto allocated resource elements of the OFDM time-frequency grid, enabling the receiver to efficiently handle time / frequency selective fading radio channels.

[0029] The mapping of DMRS to resource elements can be configured in terms of density in both the frequency and time domains. Two mapping types in the frequency domain (configuration type 1 or type 2) and two mapping types in the time domain (mapping type A or type B) define the symbol position of the first DMRS within the transmission interval. The DMRS mapping in the time domain can be further based on single symbols or double symbols, where the latter means mapping DMRS between two adjacent symbol pairs. Furthermore, the UE can be configured with one, two, three, or four single-symbol DMRSs and one or two double-symbol DMRSs. In scenarios with low Doppler, configuring only the preceding DMRS (i.e., one single-symbol DMRS or one double-symbol DMRS) may be sufficient, while in scenarios with high Doppler, additional DMRSs will be required.

[0030] Figure 4Mappings for configuration types 1 and 2 with single-symbol and double-symbol DMRS, and mapping type A for a preceding DMRS with a first DMRS in the third symbol of a 14-symbol transmission interval, are shown. CDM groups are indicated by different hash / padded patterns. We observe from this figure that types 1 and 2 differ in both mapping structure and the number of supported DMRS CDM groups, with type 1 supporting 2 CDM groups and type 2 supporting 3 CDM groups.

[0031] Details of the MAC CE signaling used to activate / deactivate the TCI state of a UE-specific PDSCH are provided regarding the activation / deactivation of the Transport Configuration Indicator (TCI) state of the UE-specific PDSCH via MAC CE. Figure 5 The structure of the MAC CE used to activate / deactivate the TCI state of a UE-specific PDSCH is given in the document.

[0032] like Figure 5 As shown, MAC CE contains the following fields:

[0033] • Serving Cell ID: This field indicates the identifier of the serving cell to which MAC CE applies. This field is 5 bits long.

[0034] • BWP ID: This field contains the ID corresponding to the downlink bandwidth portion to which the MAC CE applies. The BWP ID is given by the higher-layer parameter BWP-Id as specified in 3GPP TS 38.331 V15.7.0. The BWP ID field is 2 bits long because for DL, the UE can be configured with up to 4 BWPs;

[0035] • Variable number of fields Ti: If the UE is configured with a TCI state with TCI state ID i, field Ti indicates the active / deactivated state of the TCI state with TCI state ID i. If the UE is not configured with a TCI state with TCI state ID i, the MAC entity ignores the Ti field. As specified in 3GPP TS 38.214 V15.7.0, the Ti field is set to "1" to indicate that the TCI state with TCI state ID i will be activated and mapped to a code point in the DCI transport configuration indication field. The Ti field is set to "0" to indicate that the TCI state with TCI state ID i will be deactivated and will not be mapped to a code point in the DCI transport configuration indication field. It should be noted that the code point to which a TCI state is mapped is determined by the sequential position among all TCI states with a Ti field set to "1". That is, the first TCI state with the Ti field set to "1" will be mapped to the code point value 0 of the DCI Transport Configuration Indicator field, the second TCI state with the Ti field set to "1" will be mapped to the code point value 1 of the DCI Transport Configuration Indicator field, and so on. In NR Rel-15, the maximum number of active TCI states is 8;

[0036] • Reserved bit R: In NR Rel-15, this bit is set to '0'.

[0037] Note that, as specified in Table 6.2.1-1 of 3GPP TS 38.321 (which is reproduced below in Table 1), the TCI state activation / deactivation of the UE-specific PDSCH MAC CE is identified by a MAC Protocol Data Unit (PDU) subheader with a Logical Channel ID (LCID). The MAC CE used for the activation / deactivation of the TCI state of the UE-specific PDSCH has a variable size.

[0038] Table 1. LCID values ​​for DL-SCH (excerpted from Table 6.2.1-1 of 3GPP TS 38.321)

[0039] index LCID value 0 CCCH 1–32 Logical channel identifier 33-46 reserve 47 Recommendation rate 48 SP ZP CSI-RS resource collection activation / deactivation 49 PUCCH spatial relation activation / deactivation 50 SP SRS Activation / Deactivation 51 SP CSI report on PUCCH activation / deactivation 52 UE-specific PDCCH TCI status indication 53 UE-specific PDCCH TCI state activation / deactivation 54 Aperiodic CSI triggers state subselection. 55 SP CSI-RS / CSI-IM Resource Collection Activation / Deactivation 56 Copy to activate / deactivate 57 SCell activation / deactivation (four octets) 58 SCell activation / deactivation (one octet) 59 Long DRX command 60 DRX command 61 Pre-time command 62 UE contention resolution identifier 63 Filler

[0040] Noncoherent joint transport (NC-JT) refers to multiple input-multiple-output (MIMO) data transmission across multiple transfer points (TRPs) or panels, where different MIMO layers transmit on different TRPs. NR Rel-16 specifies two methods for scheduling NC-JT multi-TRP transmissions: multi-PDCCH-based multi-TRP transmission and single-PDCCH-based multi-TRP transmission.

[0041] Regarding multi-TRP transmission based on multiple PDCCH, Figure 6An example is shown where data is sent to the UE on two TRPs, each TRP carrying a transport block (TB) mapped to a codeword. When the UE has four receive antennas and each TRP has only two transmit antennas, the UE can support up to four MIMO layers, but each TRP can transmit a maximum of two MIMO layers. In this case, by sending data to the UE on two TRPs, the peak data rate to the UE can be increased because up to four aggregation layers from the two TRPs can be used. This is beneficial when the traffic load in each TRP is low and therefore resource utilization is low. In this example, a single scheduler is used to schedule data on both TRPs. In a time slot, one PDCCH is transmitted from each of the two TRPs, and one PDSCH is scheduled for each. This is called a multi-PDCCH or multi-DCI scheme, where the UE receives two PDCCHs and two associated PDSCHs from the two TRPs in a time slot.

[0042] exist Figure 7 In another scenario shown, a separate scheduler is used for each TRP. In this case, due to the non-ideal backhaul, i.e., backhaul with large latency and / or latency variation (which is comparable to the loop prefix length, or even longer in some cases, up to several milliseconds), only semi-static to semi-dynamic coordination between the two schedulers is possible.

[0043] The NR specification 3GPP TS 38.211 contains limitations, which are stated as follows:

[0044] The UE can assume that the PDSCH DM-RS within the same CDM group are quasi-cooperatively positioned with respect to Doppler frequency shift, Doppler spread, average delay, delay spread, and spatial Rx.

[0045] If a UE is not scheduled on all DMRS ports within a CDM group, there may be another UE that is simultaneously scheduled using the remaining ports of that CDM group. The UE can then estimate the channel (and therefore the interference signal) used by this other UE in order to perform coherent interference suppression. Therefore, this is useful in multi-user MIMO (MU-MIMO) scheduling and UE interference suppression.

[0046] In a multi-TRP scenario where the UE receives PDSCH via multiple PDCCHs transmitted from different TRPs, the signals transmitted from different TRPs are likely not quasi-cooperatively localized because the TRPs may be spatially separated. In this case, the PDSCHs transmitted from different TRPs will have different TCI states associated with them. Furthermore, according to the above restrictions, the two PDSCH DMRSs associated with two TRPs must belong to different DMRS CDM groups (because the two PDSCH DMRSs are not QCL, they cannot belong to the same DMRS CDM group). Figure 8 An example relationship between TCI states and DMRS CDM groups is shown for a multi-PDCCH, multi-TRP scenario. In this example, PDSCH1 is associated with TCI state p1, and PDSCH2 is associated with TCI state q. PDSCH DMRS from different TRPs also belong to different DMRS CDM groups because they are not quasi-co-localized. In this example, the DMRS of PDSCH1 belongs to CDM group u, while the DMRS of PDSCH2 belongs to CDM group v.

[0047] In RAN1#96, the following agreement was reached:

[0048]

[0049] According to the underlined portion of the agreement, CORESET is used to distinguish between TRPs. That is, one CORESET corresponds to one of the TRPs, and another CORESET corresponds to a second TRP. Note that there is one 'PDCCH-config' for each dedicated downlink BWP. In RAN1#97, the following was further agreed upon:

[0050]

[0051] According to the underlined and italicized portions of the agreement, the number of CORESETs per 'PDCCH-config' has increased from three to five (note that the NR Rel-15 limit is three), allowing for the flexible assignment of 2-3 CORESETs per TRP. Furthermore, in RAN1#97, the following agreement was reached: a higher-level index for each CORESET is introduced to facilitate pooling or grouping of CORESETs. CORESETs with the same higher-level index value belong to the same CORESET pool and correspond to one TRP.

[0052] Therefore, in NR Rel-16, for multi-TRP PDSCH transports with multiple PDCCHs, one or more CORESET pools (configured via the higher-level index of each CORESET) can be configured for the UE. A CORESET pool consists of one or more CORESETs.

[0053] For multi-TRP transmissions based on a single PDCCH, a single PDCCH is received from one of the TRPs, while one or more PDSCHs will be received from two TRPs. Figure 9 An example is shown where two PDSCHs are scheduled by the DCI received by the UE from TRP1 in the PDCCH. The first PDSCH (PDSCH1) is received from TRP1, and the second PDSCH (PDSCH2) is received from TRP2. Although Figure 9 This illustrates two PDSCHs being scheduled by a single PDCCH, but the single PDCCH scheme also applies to the case where different PDSCH layer sets belonging to the same PDSCH are received from two TRPs. This is in Figure 10 The example shows that PDSCH layer set 1 is received from TRP1 and PDSCH layer set 2 is received from TRP2.

[0054] In this scenario, each PDSCH or set of PDSCH layers transmitted from different TRPs has a different TCI state associated with the different TRPs. Figure 9 and Figure 10 In the example, PDSCH1 and PDSCH layer set 1 are associated with TCI state p, and PDSCH2 and PDSCH layer set 2 are associated with TCI state q. PDSCH DMRS from different TRPs can belong to different DMRSCDM groups. Figure 9 In the example, the DMRS of PDSCH1 belongs to CDM group u, while the DMRS of PDSCH2 belongs to CDM group v.

[0055] At the RAN1 AdHoc meeting in January 2019, the following agreements were reached:

[0056]

[0057] According to the aforementioned agreement, each code point in the DCI Transport Configuration Indication field can map to one or two TCI states. This can be interpreted as follows: the DCI in the PDCCH schedules one or two PDSCHs or sets of PDSCH layers, where each PDSCH or set of PDSCH layers is associated with a different TCI state; the code point in the DCI Transport Configuration Indication field indicates one or two TCI states associated with the scheduled one or two PDSCHs. Furthermore, according to the aforementioned agreement, at least for DMRS Type 1, a PDSCH DMRS associated with a TCI state is included within a DMRS CDM group.

[0058] There are currently some challenges. As discussed above, in the NR Rel-15 MAC CE for TCI state activation / deactivation of UE-specific PDSCHs, a single code point in the DCI Transport Configuration Indication field can only be mapped to a single TCI state. Therefore, the NR Rel-15 MAC CE for TCI state activation / deactivation of UE-specific PDSCHs cannot be used for multi-TRP based on a single PDCCH, where one code point in the DCI Transport Configuration Indication field needs to be mapped to one or two TCI states. Furthermore, in NR Rel-16, the MAC CE for TCI state activation / deactivation of UE-specific PDSCHs should also support multi-TRP transmission based on multiple PDCCHs. Therefore, considering the need to support both single-PDCCH-based multi-PDSCH scheduling and multi-PDCCH-based multi-PDSCH scheduling, how to use the MAC CE for PDSCH TCI state activation is an open question. Summary of the Invention

[0059] This document discloses a system and method for updating the Active Transmission Configuration Indicator (TCI) state for multi-transmitter / receiver point (TRP) physical downlink shared channel (PDSCH) transmissions based on a single physical downlink control channel (PDCCH) or multiple PDCCHs. In one embodiment, a method performed by a wireless communication device in a cellular communication system includes receiving a Media Access Control (MAC) control element (CE) from a network node for activating or deactivating the TCI state. The MAC CE includes information that: activates one or more TCI states for a specific serving cell and / or bandwidth portion (BWP) of the wireless communication device, wherein the specific serving cell and / or BWP is configured for multi-PDCCH-based multi-PDSCH transmissions; and maps at most one of the one or more TCI states activated by the MAC CE to each of a plurality of code points in a downlink control information (DCI) transmission configuration indicator field. The method further includes receiving a PDCCH including a DCI, in which the DCI transport configuration field is set to a specific code point among the plurality of code points of the DCI transport configuration field; and determining a TCI state for PDSCH scheduled via the DCI from the one or more TCI states activated by the MAC CE based on the information included in the DCI that maps at most one TCI state among the one or more TCI states activated by the MAC CE to each code point among the plurality of code points of the DCI transport configuration indication field. In this way, a unified MAC CE design is provided for both single-PDCCH-based scheduling and multi-PDCCH-based scheduling.

[0060] In one embodiment, the PDSCH scheduled by the DCI is part of a multi-PDSCH transmission based on multi-PDCCH.

[0061] In one embodiment, the method further includes receiving the PDSCH scheduled via the DCI.

[0062] A corresponding embodiment of a wireless communication device is also disclosed. In one embodiment, a wireless communication device for a cellular communication system is adapted to receive a MAC CE from a network node for TCI state activation or deactivation. The MAC CE includes information that: activates one or more TCI states of a specific serving cell and / or BWP of the wireless communication device, wherein the specific serving cell and / or BWP is configured for multi-PDSCH transmission based on multiple PDCCH; and maps at most one of the one or more TCI states activated by the MAC CE to each of a plurality of code points in a DCI transmission configuration indication field. The wireless communication device is further adapted to receive a PDCCH including a DCI, wherein the DCI transmission configuration field is set to a specific code point among the plurality of code points of the DCI transmission configuration field; and to determine a TCI state for PDSCH scheduled by the DCI from the one or more TCI states activated by the MAC CE based on the information included in the DCI that maps at most one TCI state among the one or more TCI states activated by the MAC CE to each code point among the plurality of code points of the DCI transmission configuration indication field.

[0063] In one embodiment, a wireless communication device for a cellular communication system includes one or more transmitters, one or more receivers, and processing circuitry associated with the one or more transmitters and the one or more receivers. The processing circuitry is configured to cause the wireless communication device to receive a MAC CE from a network node for TCI state activation or deactivation. The MAC CE includes information that: activates one or more TCI states of a specific serving cell and / or BWP of the wireless communication device, wherein the specific serving cell and / or BWP is configured for multi-PDSCH transmission based on multiple PDCCH; and maps at most one of the one or more TCI states activated by the MAC CE to each of a plurality of code points in a DCI transmission configuration indication field. The processing circuitry is further configured to enable the wireless communication device to receive a PDCCH including a DCI, wherein the DCI transmission configuration field is set to a specific code point among the plurality of code points of the DCI transmission configuration field; and to determine a TCI state for PDSCH scheduled via the DCI from the one or more TCI states activated by the MAC CE based on the information included in the DCI that maps at most one TCI state among the one or more TCI states activated by the MAC CE to each code point among the plurality of code points of the DCI transmission configuration indication field.

[0064] Embodiments of a method performed by a network node are also disclosed. In one embodiment, a method performed by a network node in a cellular communication system includes transmitting or initiating a MAC CE for activating or deactivating a TCI state to a wireless communication device. The MAC CE includes information that: activates one or more TCI states of a specific serving cell and / or BWP of the wireless communication device, wherein the specific serving cell is configured for multi-PDSCH transmission based on multiple PDCCHs; and maps at most one of the one or more TCI states activated by the MAC CE to each of a plurality of code points in a DCI transmission configuration indication field. The method further includes transmitting or initiating a PDCCH including a DCI to the wireless communication device, wherein the DCI transmission configuration field is set to a specific code point among the plurality of code points in the DCI transmission configuration field, the specific code point being mapped to a desired TCI state of a PDSCH scheduled by the DCI.

[0065] In one embodiment, the PDSCH scheduled by the DCI is part of a multi-PDSCH transmission based on multi-PDCCH.

[0066] In one embodiment, the method further includes transmitting or initiating the transmission of the PDSCH scheduled by the DCI.

[0067] A corresponding embodiment of a network node is also disclosed. In one embodiment, a network node for a cellular communication system is adapted to transmit or initiate a MAC CE for TCI state activation or deactivation to a wireless communication device. The MAC CE includes information that: activates one or more TCI states of a specific serving cell and / or BWP of the wireless communication device, wherein the specific serving cell and / or BWP is configured for multi-PDSCH transmission based on multiple PDCCH; and maps at most one of the one or more TCI states activated by the MAC CE to each of a plurality of code points in a DCI transmission configuration indication field. The network node is also adapted to transmit or initiate a PDCCH including a DCI to the wireless communication device, wherein the DCI transmission configuration field is set to a specific code point among the plurality of code points in the DCI transmission configuration field, the specific code point being mapped to the desired TCI state of a PDSCH scheduled by the DCI.

[0068] In one embodiment, a network node for a cellular communication system includes processing circuitry configured to cause the network node to transmit or initiate a MAC CE for TCI state activation or deactivation to a wireless communication device. The MAC CE includes information that: activates one or more TCI states of a specific serving cell and / or BWP of the wireless communication device, wherein the specific serving cell and / or BWP is configured for multi-PDSCH transmission based on multiple PDCCHs; and maps at most one of the one or more TCI states activated by the MAC CE to each of a plurality of code points in a DCI transmission configuration indication field. The processing circuitry is further configured to cause the network node to transmit or initiate a PDCCH including a DCI to the wireless communication device, wherein the DCI transmission configuration field is set to a specific code point among the plurality of code points in the DCI transmission configuration field, the specific code point being mapped to a desired TCI state of a PDSCH scheduled by the DCI.

[0069] In another embodiment, a method performed by a wireless communication device in a cellular communication system includes receiving a MAC CE from a network node for activating or deactivating a TCI state. The MAC CE includes information that: one or more TCI states activating a plurality of component carriers (CCs) are included in a configured CC list that enables simultaneous TCI state updates; and maps up to X TCI states activated by the MAC CE to each of a plurality of code points in a DCI transmission configuration indication field, where X is an integer greater than or equal to 1. The configured CC list includes only CCs that have enabled multi-PDSCH transmission based on multiple PDCCHs or enabled single-PDSCH or multi-PDSCH transmission based on a single PDCCH.

[0070] In one embodiment, X=1. In another embodiment, X=2.

[0071] In one embodiment, the method further includes receiving a PDCCH including a DCI, wherein the DCI transport configuration field is set to a specific codepoint from a plurality of codepoints in the DCI transport configuration field, the PDCCH being a PDCCH for multi-PDSCH based multi-PDCCH transmission or single-PDSCH or multi-PDSCH based single-PDCCH transmission over one or more of the plurality of CCs included in the configured CC list. The method further includes determining at least one TCI state from the one or more TCI states activated by the MACCE for at least one PDSCH scheduled via the DCI based on information included in the DCI that maps at most one TCI state activated by the MACCE to each codepoint in the plurality of codepoints in the DCI transport configuration indication field. In one embodiment, the at least one PDSCH scheduled via the DCI is part of a multi-PDSCH transmission based on a multi-PDCCH. In one embodiment, the method further includes receiving the at least one PDSCH scheduled via the DCI.

[0072] In one embodiment, the method further includes receiving the configured list of CCs that are enabled for simultaneous TCI state updates from a network node.

[0073] A corresponding embodiment of a wireless communication device is also disclosed. In one embodiment, a wireless communication device for a cellular communication system is adapted to receive a MAC CE from a network node for TCI state activation or deactivation. The MAC CE includes information such as: one or more TCI states activating a plurality of component carriers (CCs), the plurality of CCs being included in a configured CC list that is enabled and whose TCI states are updated simultaneously; and mapping up to X TCI states activated by the MAC CE to each of a plurality of code points in a DCI transmission configuration indication field, where X is an integer greater than or equal to 1. The configured CC list includes only CCs that have enabled multi-PDSCH transmission based on multiple PDCCH or single-PDSCH or multi-PDSCH transmission based on a single PDCCH.

[0074] In one embodiment, a wireless communication device for a cellular communication system includes one or more transmitters, one or more receivers, and processing circuitry associated with the one or more transmitters and receivers. The processing circuitry is configured to cause the wireless communication device to receive a MAC CE from a network node for TCI state activation or deactivation. The MAC CE includes information that: one or more TCI states activating a plurality of component carriers (CCs) are included in a configured CC list that enables simultaneous TCI state updates; and maps up to X TCI states activated by the MAC CE to each of a plurality of code points in a DCI transmission configuration indication field, where X is an integer greater than or equal to 1. The configured CC list includes only CCs that have enabled multi-PDSCH transmission based on multiple PDCCHs or single-PDSCH or multi-PDSCH transmission based on a single PDCCH.

[0075] In another embodiment, a method performed by a network node in a cellular communication system includes transmitting or initiating a MAC CE for activating or deactivating a TCI state to a wireless communication device. The MAC CE includes information such as: one or more TCI states activating a plurality of component carriers (CCs), the plurality of CCs being included in a configured CC list that enables simultaneous TCI state updates; and mapping up to X TCI states activated by the MAC CE to each of a plurality of code points in a DCI transmission configuration indication field, where X is an integer greater than or equal to 1. The configured CC list includes only CCs that have enabled multi-PDSCH transmission based on multiple PDCCHs or enabled single-PDSCH or multi-PDSCH transmission based on a single PDCCH.

[0076] In one embodiment, X=1. In another embodiment, X=2.

[0077] In one embodiment, the method further includes transmitting or initiating the transmission of a PDCCH including a DCI, wherein the DCI transport configuration field is set to a specific codepoint from the plurality of codepoints in the DCI transport configuration field. The PDCCH is a PDCCH for multi-PDSCH transmission based on multiple PDCCHs or single-PDSCH or multi-PDSCH transmission based on a single PDCCH over one or more of the plurality of CCs included in the configured CC list. The specific codepoint is mapped to at least one TCI state determined from the one or more TCI states activated by the MAC CE for scheduling at least one PDSCH via the DCI. In one embodiment, the at least one PDSCH scheduled via the DCI is part of a multi-PDSCH transmission based on multiple PDCCHs. In one embodiment, the method further includes transmitting or initiating the transmission of the at least one PDSCH scheduled via the DCI.

[0078] In one embodiment, the method further includes transmitting or initiating the transmission of the configured CC list to a wireless communication device, which enables simultaneous TCI state updates.

[0079] A corresponding embodiment of a network node is also disclosed. In one embodiment, a network node for a cellular communication system is adapted to transmit or initiate the transmission of a MAC CE for TCI state activation or deactivation to a wireless communication device. The MAC CE includes information such as: one or more TCI states activating a plurality of component carriers (CCs), the plurality of component carrier CCs being included in a configured CC list that is enabled and whose TCI states are updated simultaneously; and mapping up to X TCI states activated by the MAC CE to each of a plurality of code points in a DCI transmission configuration indication field, where X is an integer greater than or equal to 1. The configured CC list includes only CCs that have enabled multi-PDSCH transmission based on multiple PDCCH or single-PDSCH or multi-PDSCH transmission based on a single PDCCH.

[0080] In one embodiment, a network node for a cellular communication system includes processing circuitry configured to transmit or initiate a MAC CE for TCI state activation or deactivation to a wireless communication device. The MAC CE includes information such as: one or more TCI states activating a plurality of component carrier CCs, the plurality of component carrier CCs being included in a configured CC list that enables simultaneous TCI state updates; and mapping up to X TCI states activated by the MAC CE to each of a plurality of code points in a DCI transmission configuration indication field, where X is an integer greater than or equal to 1. The configured CC list includes only CCs that have enabled multi-PDSCH transmission based on multiple PDCCHs or enabled single-PDSCH or multi-PDSCH transmission based on a single PDCCH.

[0081] In another embodiment, a method performed by a wireless communication device in a cellular communication system includes receiving a MAC CE from a network node for activating or deactivating a TCI state. The MAC CE includes information that: activates one or more TCI states; and defines a code point-to-TCI state mapping, wherein the code point-to-TCI state mapping maps each of a plurality of code points in a DCI transmission configuration indication field to at most X TCI states among the one or more TCI states activated by the MAC CE, where X is an integer greater than or equal to 1. The MAC CE also includes a Control Resource Set (CORESET) pool identifier (ID) indicating that the one or more TCI states activated by the MAC CE and the code point-to-TCI state mapping defined by the information included in the MAC CE will be applied to a PDCCH, carrying the PDCCH within any CORESET in the CORESET pool indicated by the CORESET pool ID. The method further includes receiving a PDCCH carried within a CORESET in the CORESET pool indicated by the CORESET pool ID, the PDCCH including a DCI, wherein the DCI transport configuration field is set to a specific code point among the plurality of code points of the DCI transport configuration field. The method further includes determining a TCI state for PDSCH scheduled via the DCI from the one or more TCI states activated by the MAC CE based on the information included in the DCI.

[0082] In one embodiment, X=1. In another embodiment, X=2.

[0083] In one embodiment, the PDSCH scheduled by the DCI is part of a multi-PDSCH transmission based on multi-PDCCH.

[0084] In one embodiment, the method further includes receiving the PDSCH scheduled via the DCI.

[0085] A corresponding embodiment of a wireless communication device is also disclosed. In one embodiment, a wireless communication device for a cellular communication system is adapted to receive a MAC CE for TCI state activation or deactivation from a network node. The MAC CE includes information that: activates one or more TCI states; and defines a code point-to-TCI state mapping, wherein the code point-to-TCI state mapping maps each of a plurality of code points in a DCI transmission configuration indication field to at most X TCI states among the one or more TCI states activated by the MAC CE, where X is an integer greater than or equal to 1. The MAC CE also includes a CORESET pool ID, which indicates that the one or more TCI states activated by the MAC CE and the code point-to-TCI state mapping defined by the information included in the MAC CE will be applied to a PDCCH, carrying the PDCCH within any CORESET in the CORESET pool indicated by the CORESET pool ID. The wireless communication device is further adapted to receive a PDCCH carried within a CORESET in the CORESET pool indicated by the CORESET pool ID, the PDCCH including a DCI, wherein the DCI transport configuration field is set to a specific code point among the plurality of code points of the DCI transport configuration field. The wireless communication device is further adapted to determine, based on the information included in the DCI, a TCI state for scheduling a PDSCH via the DCI from one or more TCI states activated by the MAC CE.

[0086] In one embodiment, a wireless communication device for a cellular communication system includes: one or more transmitters, one or more receivers, and processing circuitry associated with the one or more transmitters and the one or more receivers, the processing circuitry being configured to cause the wireless communication device to receive a MAC CE from a network node for TCI state activation or deactivation. The MAC CE includes information that: activates one or more TCI states; and defines a code point-to-TCI state mapping, wherein the code point-to-TCI state mapping maps each of a plurality of code points in a DCI transmission configuration indication field to at most X TCI states among the one or more TCI states activated by the MAC CE, where X is an integer greater than or equal to 1. The MAC CE also includes a CORESET pool ID, which indicates that the one or more TCI states activated by the MAC CE and the code point-to-TCI state mapping defined by the information included in the MAC CE will be applied to a PDCCH, carrying the PDCCH within any CORESET in the CORESET pool indicated by the CORESET pool ID. The processing circuitry is further configured to enable the wireless communication device to receive a PDCCH carried within a CORESET in the CORESET pool indicated by the CORESET pool ID, the PDCCH including a DCI, wherein the DCI transport configuration field is set to a specific code point among the plurality of code points of the DCI transport configuration field. The processing circuitry is also configured to enable the wireless communication device to determine, based on the information included in the DCI, a TCI state for scheduling a PDSCH via the DCI from one or more TCI states activated by the MAC CE.

[0087] In another embodiment, a method performed by a network node in a cellular communication system includes transmitting or initiating a MAC CE for activating or deactivating a TCI state to a wireless communication device. The MAC CE includes information that: activates one or more TCI states; and defines a code point-to-TCI state mapping, wherein the code point-to-TCI state mapping maps each of a plurality of code points in a DCI transport configuration indication field to at most X TCI states among the one or more TCI states activated by the MAC CE, where X is an integer greater than or equal to 1. The MAC CE also includes a CORESET pool ID, indicating that the one or more TCI states activated by the MAC CE and the code point-to-TCI state mapping defined by the information included in the MAC CE will be applied to a PDCCH, carrying the PDCCH within any CORESET in the CORESET pool indicated by the CORESET pool ID. The method further includes transmitting or initiating the transmission to the wireless communication device a PDCCH carried within a CORESET in the CORESET pool indicated by the CORESET pool ID, the PDCCH including a DCI, wherein the DCI transport configuration field is set to a specific code point among the plurality of code points of the DCI transport configuration field.

[0088] In one embodiment, X=1. In another embodiment, X=2.

[0089] In one embodiment, the PDSCH scheduled by the DCI is part of a multi-PDSCH transmission based on multi-PDCCH.

[0090] In one embodiment, the method further includes transmitting or initiating the transmission of the PDSCH scheduled by the DCI.

[0091] A corresponding embodiment of a network node is also disclosed. In one embodiment, a network node for a cellular communication system is adapted to transmit or initiate the transmission of a MAC CE for TCI state activation or deactivation to a wireless communication device. The MAC CE includes information that: activates one or more TCI states; and defines a code point-to-TCI state mapping, wherein the code point-to-TCI state mapping maps each of a plurality of code points in a DCI transmission configuration indication field to at most X TCI states among the one or more TCI states activated by the MAC CE, where X is an integer greater than or equal to 1. The MAC CE also includes a CORESET pool ID, which indicates that the one or more TCI states activated by the MAC CE and the code point-to-TCI state mapping defined by the information included in the MAC CE will be applied to a PDCCH, carrying the PDCCH within any CORESET in the CORESET pool indicated by the CORESET pool ID. The network node is also adapted to transmit or initiate the transmission of a PDCCH carried in a CORESET within a CORESET pool indicated by the CORESET pool ID, the PDCCH including a DCI, wherein the DCI transmission configuration field is set to a specific code point among the plurality of code points of the DCI transmission configuration field.

[0092] In one embodiment, a network node for a cellular communication system includes: processing circuitry configured to cause the network node to transmit or initiate transmission of a MAC CE for TCI state activation or deactivation to a wireless communication device. The MAC CE includes information that: activates one or more TCI states; and defines a code point-to-TCI state mapping, wherein the code point-to-TCI state mapping maps each of a plurality of code points in a DCI transmission configuration indication field to at most X TCI states among the one or more TCI states activated by the MAC CE, where X is an integer greater than or equal to 1. The MAC CE also includes a CORESET pool ID, indicating that the one or more TCI states activated by the MAC CE and the code point-to-TCI state mapping defined by the information included in the MAC CE will be applied to a PDCCH, carrying the PDCCH within any CORESET in the CORESET pool indicated by the CORESET pool ID. The processing circuitry is further configured to cause a network node to transmit or initiate the transmission of a PDCCH carried within a CORESET in the CORESET pool indicated by the CORESET pool ID, the PDCCH including a DCI, wherein the DCI transmission configuration field is set to a specific code point among the plurality of code points of the DCI transmission configuration field. Attached Figure Description

[0093] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate several aspects of this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0094] Figure 1 An example of a 3GPP New Radio (NR) time-domain architecture with a 15 kHz subcarrier spacing is shown;

[0095] Figure 2 The time slot duration is shown for different subcarrier spacings;

[0096] Figure 3 The basic NR physical time-frequency resource grid is shown;

[0097] Figure 4 Mappings are shown for configuration types 1 and 2 with single-symbol and double-symbol DMRS, and for mapping type A of mapping type A with a first DMRS in the third symbol of a fourteen-symbol transmission interval.

[0098] Figure 5The Media Access Control (MAC) control element (CE) structure for activating / deactivating the Transmission Configuration Indicator (TCI) state for user equipment (UE) specific physical downlink shared channel (PDSCH) transmissions, as defined in version 15 of 3GPP Technical Specification (TS) 38.321, is shown.

[0099] Figure 6 An example of multi-transmit / receive point (TRP) transmission based on a multi-physical downlink control channel (PDCCH) is shown, where data is sent to the UE on two TRPs, each TRP carrying a transport block (TB) mapped to a codeword;

[0100] Figure 7 An example of multi-TRP transport based on multiple PDCCH is shown, in which an independent scheduler is used in each TRP;

[0101] Figure 8 An example relationship between TCI states and DMRS code division multiplexing (CDM) groups is shown for a multi-PDCCH multi-TRP scenario;

[0102] Figure 9 An example is shown where two PDSCHs are scheduled by the UE in the PDCCH based on the downlink control information (DCI) received from the first TRP (TRP1) in the PDCCH (i.e., multi-TRP transmission based on a single PDCCH);

[0103] Figure 10 An example of a single PDCCH scheme is shown, in which different sets of PDSCH layers belonging to the same PDSCH are received from two TRPs;

[0104] Figure 11 An example of a cellular communication system is shown in which embodiments of this disclosure can be implemented;

[0105] Figure 12 An example is shown where two different PDSCHs are completely overlapped in the time-frequency domain by multiple PDCCH scheduling, in which DMRS CDM groups 0 and 1 are used for PDSCH 1 and 2, respectively;

[0106] Figure 13 Another example of multi-PDCCH scheduling is shown, where PDCCH1 schedules a single PDSCH (i.e., PDSCH 1), while PDCCH2 schedules two different PDSCHs (i.e., PDSCH 2 and PDSCH 3).

[0107] Figures 14 to 16 An example of a MAC CE for TCI state update according to a first embodiment of the present disclosure is shown, wherein limitations are applied;

[0108] Figure 17 An example MAC CE according to an embodiment of the present disclosure is shown, wherein the described mapping of code points in the DCI transport configuration indication field is used to indicate ten TCI status identifiers (IDs);

[0109] Figure 18 The operation of a network node and a UE according to at least some aspects of a first embodiment of the present disclosure is illustrated;

[0110] Figure 19 An example of a MAC CE for simultaneous TCI state update of a component carrier (CC) list according to a second embodiment of the present disclosure is shown, wherein limitations are applied;

[0111] Figure 20 An example of MACCE for simultaneous TCI state updates of multiple cells according to a second embodiment of the present disclosure is shown, wherein limitations are applied;

[0112] Figure 21 The operation of a network node and a UE according to at least some aspects of a second embodiment of the present disclosure is illustrated;

[0113] Figure 22 The operation of a network node and a UE according to at least some aspects of a third embodiment of the present disclosure is illustrated;

[0114] Figures 23 to 25 This is a schematic block diagram of an example embodiment of a network node;

[0115] Figure 26 and Figure 27 This is a schematic block diagram of an example embodiment of a wireless communication device;

[0116] Figure 28 Example embodiments of a communication system that can implement the embodiments of this disclosure are shown;

[0117] Figure 29 It shows Figure 28 Example embodiments of the host computer, base station, and UE; and

[0118] Figure 30 and Figure 31 This is shown in communication systems (such as...) Figure 28 A flowchart of an example embodiment of a method implemented in a communication system. Detailed Implementation

[0119] Some embodiments contemplated herein will now be described more fully with reference to the accompanying drawings. However, other embodiments are included within the scope of the subject matter disclosed herein, and the disclosed subject matter should not be construed as being limited to the embodiments set forth herein; rather, these embodiments are provided by way of example to convey the scope of the subject matter to those skilled in the art.

[0120] Generally, all terms used herein will be interpreted according to their ordinary meaning in the relevant art, unless a different meaning is clearly given and / or implied from the context of their use. Unless otherwise expressly stated, all references to elements, devices, components, parts, steps, etc., should be openly interpreted as referring to at least one instance of said element, device, component, part, step, etc. The steps of any method disclosed herein are not necessarily performed in the exact order disclosed, unless the steps are explicitly described as occurring after or before another step and / or where it is implied that a step must occur after or before another step. Where appropriate, any feature of any embodiment disclosed herein may be applied to any other embodiment. Similarly, any advantage of any embodiment may be applied to any other embodiment, and vice versa. Further objects, features, and advantages of the appended embodiments will become apparent from the following description.

[0121] Radio node: As used herein, a “radio node” is a radio access node or wireless communication device.

[0122] Radio Access Node: As used herein, a “radio access node” or “radio network node” or “radio access network node” is any node in the radio access network (RAN) of a cellular communication network that operates to wirelessly transmit and / or receive signals. Some examples of radio access nodes include, but are not limited to, base stations (e.g., NR base stations (gNBs) in 3GPP 5G New Radio (NR) networks or enhanced or evolved Node Bs (eNBs) in 3GPP Long Term Evolution (LTE) networks), high-power or macro base stations, low-power base stations (e.g., micro base stations, pico base stations, home eNBs, or the like), relay nodes, network nodes that implement partial functionality of base stations (e.g., network nodes that implement gNB central units (gNB-CUs) or gNB distributed units (gNB-DUs), or network nodes that implement partial functionality of some other type of radio access node.

[0123] Core Network Node: As used herein, a “core network node” is any type of node in the core network or any node that implements core network functions. Some examples of core network nodes include, for example, a Mobility Management Entity (MME), a Packet Data Network Gateway (P-GW), a Service Capability Opening Function (SCEF), a Home Subscriber Server (HSS), etc. Other examples of core network nodes include nodes that implement Access and Mobility Functions (AMF), UPF, Session Management Functions (SMF), Authentication Server Functions (AUSF), Network Slice Selection Functions (NSSF), Network Opening Functions (NEF), Network Functions (NF) Storehouse Functions (NRF), Policy Control Functions (PCF), Unified Data Management (UDM), etc.

[0124] Communication device: As used herein, a “communication device” is any type of device authorized to access a network. Some examples of communication devices include, but are not limited to: mobile phones, smartphones, sensor devices, instruments, vehicles, household appliances, medical devices, media players, cameras, or any type of consumer electronics device (e.g., but not limited to, televisions, radios, lighting fixtures, tablets, laptops, or personal computers (PCs)). A communication device can be a portable, handheld, computer-integrated, or vehicle-mounted mobile device enabled to transmit voice and / or data via a wireless or wired connection.

[0125] Wireless communication device: One type of communication device is a wireless communication device, which can be any type of wireless device authorized to access a wireless network (e.g., a cellular network) (i.e., served by it). Some examples of wireless communication devices include, but are not limited to: User Equipment (UE) devices in 3GPP networks, Machine-Type Communication (MTC) devices, and Internet of Things (IoT) devices. Such wireless communication devices can be, or can be integrated into, mobile phones, smartphones, sensor devices, instruments, vehicles, home appliances, medical devices, media players, cameras, or any type of consumer electronics device (e.g., but not limited to, televisions, radio devices, lighting devices, tablet computers, laptop computers, or PCs). Wireless communication devices can be portable, handheld, computer-integrated, or vehicle-mounted mobile devices enabled to transmit voice and / or data via a wireless connection.

[0126] Network node: As used in this article, a “network node” is any node that is part of the core network or radio access network of a cellular communication network / system.

[0127] Note that the descriptions presented herein focus on 3GPP cellular communication systems, and thus, 3GPP terminology or similar terminology is frequently used. However, the concepts disclosed herein are not limited to 3GPP systems.

[0128] Note that the term “cell” may be referenced in the description herein; however, in particular with respect to the 5G NR concept, beams may be used instead of cells, and therefore it is important to note that the concepts described herein are equally applicable to both cells and beams.

[0129] Certain aspects of this disclosure and its embodiments may provide solutions to the foregoing or other challenges. In some embodiments (e.g., the set of embodiments referred to below as "Embodiment 1"), a solution is proposed regarding how to map Transmission Configuration Indicator (TCI) states to code points in the TCI field of the Downlink Control Information (DCI) (e.g., the maximum number of TCI states to be mapped to code points in the TCI field) depending on whether the serving cell or bandwidth portion (BWP) indicated in the Media Access Control (MAC) control element (CE) is configured for multi-physical downlink shared channel (PDSCH) reception based on multi-physical downlink control channel (PDCCH) or single PDSCH reception based on single PDCCH.

[0130] In some embodiments (e.g., the set of embodiments referred to as "Embodiment 2"), solutions are proposed on how to efficiently map TCI states to code points in the TCI fields of multiple serving cells or BWPs, depending on whether at least one of the multiple serving cells or bandwidth portions indicated in the MAC CE is configured for multiple PDSCH reception based on multiple PDCCH or single PDSCH reception based on a single PDCCH.

[0131] In some embodiments (e.g., the set of embodiments referred to as "Embodiment 3"), a solution is proposed for how to simultaneously update the TCI state of the PDSCH of multiple TRPs by indicating the control resource set (CORESET) pool index associated with each TRP along with the corresponding TCI state to be activated within the MAC CE.

[0132] Certain embodiments may provide one or more of the following technical advantages. Embodiments of the proposed solutions can provide a unified MAC CE design for both single-PDCCH-based multi-PDSCH scheduling and multi-PDCCH-based multi-PDSCH scheduling (both supported in NR REL-16). A key benefit of this is that it makes multi-PDCCH-based multi-TRP transport suitable for DMRS Type 1, a mandatory DMRS configuration in NR. Embodiments 2 and 3 provide efficient MAC CE signaling with reduced overhead because these embodiments allow simultaneous updates of TCI status for multiple cells or multiple TRPs.

[0133] Figure 11 An example of a cellular communication system 1100 that can implement embodiments of the present disclosure is shown. In the embodiments described herein, the cellular communication system 1100 is a 5G system (5GS) including an NR RAN or an LTE RAN (i.e., an E-UTRA RAN). In this example, the RAN includes base stations 1102-1 and 1102-2, referred to as gNB in ​​5G NR and ng-eNB in ​​5G where the LTE RAN node is connected to a 5GC, which control corresponding (macro)cells 1104-1 and 1104-2. Base stations 1102-1 and 1102-2 are generally referred to herein as base station 1102, and are individually referred to as base station 1102. Similarly, (macro)cells 1104-1 and 1104-2 are generally referred to herein as (macro)cell 1104, and are individually referred to as (macro)cell 1104. The RAN may also include multiple low-power nodes 1106-1 to 1106-4 controlling corresponding small cells 1108-1 to 1108-4. Low-power nodes 1106-1 to 1106-4 may be small base stations (such as pico or femto base stations) or remote radio head ends (RRHs) or similar. It is noteworthy that, although not shown, one or more of small cells 1108-1 to 1108-4 may alternatively be provided by base station 1102. Low-power nodes 1106-1 to 1106-4 are generally referred to herein as low-power node 1106, and are individually referred to as low-power node 1106. Similarly, small cells 1108-1 to 1108-4 are generally referred to herein as small cell 1108, and are individually referred to as small cell 1108. The cellular communication system 1100 also includes a core network 1110, which is referred to in 5GS as the 5G core (5GC). Base station 1102 (and optionally low-power node 1106) is connected to core system 1110.

[0134] Base station 1102 and low-power node 1106 provide services to wireless communication devices 1112-1 to 1112-5 in corresponding cells 1104 and 1108. Wireless communication devices 1112-1 to 1112-5 are generally referred to herein as wireless communication device 1112, and are individually referred to as wireless communication device 1112. In the following description, wireless communication device 1112 is typically a UE and is therefore sometimes referred to herein as UE 1112, but this disclosure is not limited thereto.

[0135] The present disclosure will now be described in the form of some exemplary embodiments. Although described under a separate heading, these embodiments may be used alone or in any desired combination.

[0136] In some embodiments (e.g., the set of embodiments referred to as "Embodiment 1"), a solution is proposed regarding how to map TCI states to code points in the TCI field of the DCI (e.g., the maximum number of TCI states to be mapped to code points in the TCI field) depending on whether the serving cell or bandwidth portion indicated in the MAC CE is configured for multi-PDSCH reception based on multiple PDCCH or single PDSCH reception based on a single PDCCH.

[0137] In some embodiments (e.g., the set of embodiments referred to as "Embodiment 2"), solutions are proposed on how to efficiently map TCI states to code points in the TCI fields of multiple serving cells or BWPs, depending on whether at least one of the multiple serving cells or bandwidth portions indicated in the MAC CE is configured for multiple PDSCH reception based on multiple PDCCH or single PDSCH reception based on a single PDCCH.

[0138] In some embodiments (e.g., the set of embodiments referred to as "Embodiment 3"), a solution is proposed for how to simultaneously update the TCI state of the PDSCH of multiple TRPs by indicating the CORESET pool index associated with each TRP along with the corresponding TCI state to be activated within the MAC CE.

[0139] Example 1

[0140] In this embodiment, if a given serving cell with an identifier given by the “Serving Cell ID” indicated in the MAC CE is configured for PDSCH reception based on multiple PDCCH, then UE 1112 receives a mapping, wherein each code point in the DCI transmission configuration indication field is mapped (i.e., indicated) for at most one TCI state.

[0141] It should be noted that mapping more than one TCI state per code point in the DCI Transport Configuration Indication field is only necessary when a single PDCCH schedules multiple PDSCHs or multiple sets of PDSCH layers. For multiple PDCCHs scheduling multiple PDSCHs (e.g., two PDCCHs scheduling two PDSCHs), mapping one TCI state per code point in the DCI Transport Configuration Indication field is sufficient, since there are multiple DCIs, and each DCI will use the code point in the Transport Configuration Indication field to indicate one TCI state.

[0142] For DMRS type 1, there are only two CDM groups, and multiple PDCCH scheduling from two PDSCHs from two TRPs will require two CDM groups, especially when the two PDSCHs completely or partially overlap in the time-frequency domain. Figure 12 An example is shown where two different PDSCHs are completely overlapped in the time-frequency domain by multiple PDCCH scheduling, in which DMRS CDM groups 0 and 1 are used for PDSCH 1 and 2, respectively.

[0143] Figure 13 Another example of multi-PDCCH scheduling is shown, where PDCCH1 schedules a single PDSCH (i.e., PDSCH 1), while PDCCH2 schedules two different PDSCHs (i.e., PDSCH 2 and PDSCH 3). In this example, PDCCH2 is a single PDCCH scheduling two PDSCHs from two TRPs (TRP 2 and 3). Since TRP 2 and 3 are spatially separated, different CDM groups need to be indicated for PDSCH 2 and PDSCH 3. Therefore, in the case of PDCCH2, each code point in the DCI Transport Configuration Indication field needs to map two TCI states. However, this example requires a total of three CDM groups because there are three TRPs transmitting PDSCHs to UE 1112, even though only two TRPs are transmitting PDCCHs. Therefore, Figure 13 The multi-PDCCH example in the example is not suitable as DMRS type 1 for mandatory DMRS configuration in NR because DMRS type 1 has two CDM groups, while Figure 13 The example in the example requires 3 CDM groups.

[0144] In this embodiment, when the MAC CE activates / deactivates the TCI state of the serving cell's PDSCH, if the serving cell indicated in the MAC CE is configured for PDSCH reception based on multiple PDCCHs, then UE 1112 receives a mapping of at most one TCI state for each code point in the DCI transmission configuration indication field.

[0145] The key benefit of this embodiment is that it makes multi-PDCCH-based multi-TRP transmission suitable for DMRS Type 1, which is a mandatory DMRS configuration in NR. That is, since at most one TCI state is mapped to each code point in the DCI transmission configuration indication field, each of the multiple PDCCHs (e.g., two PDCCHs) received by UE 1112 will indicate only one TCI state and will use only one DMRS CDM group (recall that one DMRS CDM group is required for each TCI state). In the case of two PDCCHs, this is equivalent to using two DMRS CDM groups, which is supported in NR DMRS Type 1.

[0146] Although this embodiment describes a limitation on mapping / indication of at most one TCI state for each code point in the DCI Transport Configuration Indication field on a per-serving-cell basis, in an alternative embodiment, this limitation may also be applied on a per-BWP basis. In this alternative embodiment, if a given BWP with an identifier given by the 'BWP ID' as indicated in the MAC CE for activating / deactivating the PDSCH TCI state is configured for PDSCH reception based on multiple PDCCHs, then UE 1112 receives a mapping of at most one TCI state for each code point in the DCI Transport Configuration Indication field.

[0147] In another embodiment, if a given serving cell (which has an identifier given by the 'Serving Cell ID' indicated in the MAC CE of the TCI state of the PDSCH activating / deactivating the serving cell) is configured for multi-PDSCH reception based on a single PDCCH (or PDSCH reception with two sets of layers, each set of layers being associated with a different TCI state), then UE 1112 receives a mapping having more than one TCI state mapped / indicated by at least one code point in the DCI transport configuration indication field.

[0148] Next, some MAC CE examples applying this embodiment are shown. In these examples, the serving cell with ID=X is configured to receive PDSCH based on multiple PDCCHs, while the serving cell with ID=Y is configured to receive PDSCH based on a single PDCCH.

[0149] exist Figure 14 The image shows a first example MAC CE applying the aforementioned limitations in Embodiment 1. In this example, the TCI status ID... i，j This indicates the j-th TCI state indicated by the i-th code point in the DCI transport configuration indication field. Furthermore, C i，jThe field indicates whether the (j+1)th TCI state associated with the i-th code point in the DCI Transport Configuration Indication field will exist in the MAC CE. Assuming the serving cell with ID=X is configured to receive PDSCH based on multiple PDCCHs, in this example, only one TCI state exists per code point in the DCI Transport Configuration Indication field. That is, the C state corresponding to each code point... i，1 The field does not indicate the existence of a second TCI state associated with this code point.

[0150] exist Figure 15 The image shows a second example MAC CE applying the aforementioned limitations in Example 1. In this example, the TCI status ID... i，j This indicates the j-th TCI state indicated by the i-th code point in the DCI transport configuration indication field. Furthermore, C i，j The field indicates whether the (j+1)th TCI state associated with the i-th code point in the DCI Transport Configuration Indication field will exist in the MAC CE. Assuming a serving cell with ID=Y is configured to receive PDSCH based on a single PDCCH, in this example, each code point in the DCI Transport Configuration Indication field may have one or more TCI states. For example,

[0151] • There are 2 TCI states (TCI state ID) 0，1 and TCI status ID 0，2 This is associated with code point 0 of the DCI transport configuration indication field. 0，1 The field indicates the TCI status ID. 0，2 The existence of [certain elements]. Furthermore, field C... 0，2 This indicates that there are no other TCI states associated with code point 0 of the DCI Transport Configuration Indication field.

[0152] • There is 1 TCI state (TCI state ID) N-1，1 This is associated with the code point (N-1) of the DCI transmission configuration indication field. N-1，1 The field indicates that there are no other TCI states associated with the code point (N-1) of the DCI Transport Configuration Indication field.

[0153] Figure 16 The image shows a third example MAC CE applying the aforementioned limitations as described in Example 1. In this example, S i This field indicates the number of TCI states associated with the I-th code point in the DCI Transport Configuration Indication field. Figure 16 In the example, S i =0 means that the I-th code point in the DCI Transmission Configuration Indication field is mapped to a TCI state. If S i=1, then the I-th code point in the DCI Transmission Configuration Indication field is mapped to both TCI states. This includes S only when the serving cell is configured to receive PDSCH based on a single PDCCH. i The field's bytes are present only, and if the serving cell is configured to receive PDSCH based on multiple PDCCH, then S i The field is missing from the MAC CE. In this example, the mapping from TCI status to code points in the TCI transport configuration indication field is given as follows:

[0154] • The first N0 TCI state IDs indicated in the MAC CE correspond to code point 0, where the value of N0 (1 or 2) will be indicated by the S0 field.

[0155] • The next N1 TCI status IDs indicated in the MAC CE correspond to code point 1, where the value of N1 (1 or 2) will be indicated by the S1 field.

[0156] •…

[0157] • The last N7 TCI state IDs indicated in the MAC CE correspond to code point 7, where the value of N7 (1 or 2) will be indicated by the S7 field.

[0158] Note that although the third example shows one or two TCI states mapped to code points in the DCI Transport Configuration Indication field, this example can be extended to map more than two TCI states to code points in the DCI Transport Configuration Indication field. To extend this example to map each code point in the DCI Transport Configuration Indication field to four TCI states, use bit pairs S in the indicated MAC CE. i1 S i0 To replace S i This bit is for S. i1 S i0 It can indicate whether 1, 2, 3, or 4 TCI states are mapped to the I-th code point in the DCI transport configuration indication field.

[0159] In some cases, the maximum number of activated TCI states can be limited to a certain number T. max This restricts UE1112 to receiving only transmissions corresponding to that limited number of TCI states. Therefore, in some variations of Embodiment 1, the maximum number of unique TCI state IDs indicated by the MAC CE is limited to T. max In NR Rel-16, T max It was agreed to be eight (8). Figure 17 An example MAC CE is shown, where 10 TCI status IDs are indicated by the following mapping to code points in the DCI transport configuration indication field:

[0160] •TCI states A and B are mapped to code point 0

[0161] •TCI state A is mapped to code point 1

[0162] •TCI states C and D are mapped to code point 2

[0163] •TCI state C is mapped to code point 3

[0164] •TCI state E is mapped to code point 4

[0165] •TCI state F is mapped to code point 5

[0166] •TCI state G is mapped to code point 6

[0167] •TCI state H is mapped to code point 7

[0168] Even though 10 TCI states are indicated, according to this embodiment, the maximum number of unique TCI states indicated by the MAC CE (i.e., TCI states A, B, C, D, E, F, G, and H) is limited to 8.

[0169] Figure 18 The operation of a network node and UE 1112 according to at least some aspects of the above embodiments is illustrated. Optional steps are indicated by dashed lines / boxes. Note that the network node may be a network node that provides joint scheduling for multiple TRPs of multi-PDSCH transmission (e.g., see [link to documentation]). Figure 6 For example, a network node could be base station 1102, which acts as one of the TRPs for multiple PDSCH transmissions (where other TRPs for multiple PDSCH transmissions could be, for example, another base station 1102 or a low-power node 1106). Alternatively, separate scheduling can be performed for multiple PDSCH transmissions (e.g., see...). Figure 7 In the case of a network node, it may be, for example, a network node in which a single scheduler is implemented, or alternatively, it may be divided into multiple network nodes, at which a corresponding scheduler is implemented (i.e., in some embodiments, ...). Figure 18 The function shown as being performed by a "network node" can be performed by two or more network nodes. Alternatively, in this case, separate network nodes for a single TRP can each perform the function independently. Figure 18 The functions are related to the PDSCH / PDSH layer group transmission of the corresponding TRP.

[0170] As shown in the figure, the network node configures UE 1112 with one or more serving cells (step 1800). The configured serving cells include: (a) one or more first serving cells configured for multi-PDSCH reception based on multiple PDCCH, (b) one or more second serving cells configured for multi-PDSCH reception based on a single PDCCH, or (c) both (a) and (b).

[0171] The network node sends or prompts the transmission of a MAC CE to UE 1112, wherein the MAC CE is the MAC CE applicable to the activation / deactivation of the TCI state of the PDSCH (step 1802). As described above, the MAC CE includes information indicating one or more TCI states activated for at least one or a corresponding BWP in the configured serving cell. Furthermore, as described above, the network node sends or prompts the transmission of information to UE 1112 indicating a mapping between the activated TCI states and code points in the TCI field of the DCI (step 1804). As described above, in some embodiments, the information of step 1804 is also provided in the MAC CE of step 1802. As described above, in this information, a limit is applied to the maximum number of TCI states that can be mapped to any code point in the TCI field of the DCI. As described above, this limit depends on whether the at least one configured serving cell or one or more corresponding BWPs activating the TCI state(s) are configured for multi-PDSCH reception based on multiple PDCCHs or multi-PDSCH reception based on a single PDCCH. For example, as described above, in some embodiments, the maximum number of PDSCH receptions based on multiple PDCCHs is limited to 1, and the maximum number of PDSCH receptions based on a single PDCCH is limited to 2.

[0172] A network node may transmit or prompt the transmission of one or more DCIs to UE 1112 for multiple PDSCH transmission (step 1806). The one or more DCIs include a corresponding TCI field set to a specific code point. This code point is mapped to one or more TCI states using the information from step 1804. UE 1112 determines the one or more TCI states for the multiple PDSCH transmission based on the code points in the one or more TCI fields of the received one or more DCIs and the mapping indicated by the information from step 1804 (step 1808). Based on the indicated one or more TCI states, the network node transmits or prompts the transmission of multiple PDSCH, and the UE receives the multiple PDSCH transmission (step 1810).

[0173] Example 2

[0174] In RAN1#98bis, the following conclusions and agreements were reached in 3GPP RAN1:

[0175]

[0176] The purpose of the above conclusions / agreements is to reduce the signaling overhead for activating the TCI state of a set of component carriers (CCs) or BWPs. Specifically, instead of sending different MAC CEs for each serving cell / BWP combination, this new agreement allows for the activation of a set of TCI state IDs for the PDSCH via MAC CE for a set of CCs / BWPs. It is also agreed to introduce two CC lists, and simultaneous TCI state ID activation across multiple CCs / BWPs via MAC CE is applied to both lists. However, the above agreement is for the case of a single TRP.

[0177] To define simultaneous TCI state ID activation across CCs / BWPs for multi-TRP scenarios, it is necessary to consider both multi-PDCCH-based and single-PDCCH-based multi-TRP scenarios. In one embodiment, all CCs in the CC list to be used for simultaneous TCI state ID updates should only involve CCs that have enabled multi-PDCCH-based multi-TRP transmissions or single-PDCCH-based multi-TRP transmissions.

[0178] Figure 19 The image shows a first example MAC CE applying the aforementioned limitations in Embodiment 2. In this example, the TCI status ID... i，j This indicates the j-th TCI state indicated by the i-th code point in the DCI transport configuration indication field. Furthermore, C i，j This field indicates whether the (j+1)th TCI state associated with the i-th code point in the DCI Transport Configuration Indication field will exist in the MAC CE. In this example, the CCs in the list with simultaneousTCI-CellListId=U are all configured to receive PDSCH based on a single PDCCH. Therefore, in this example, each code point in the DCI Transport Configuration Indication field can have one or more TCI states. For example,

[0179] • For all CCs in a list with simultaneousTCI-CellListId=U, there are two TCI states (TCI state ID). 0，1 and TCI status ID 0，2 This is associated with code point 0 of the DCI transport configuration indication field. 0，1 The field indicates the TCI status ID. 0，2 The existence of [certain elements]. Furthermore, field C... 0，2This indicates that there are no other TCI states associated with code point 0 of the DCI Transport Configuration Indication field.

[0180] • For all CCs in a list with simultaneousTCI-CellListId=U, there exists a TCI state (TCI state ID). N-1，1 This is associated with the code point (N-1) of the DCI transmission configuration indication field. N-1，1 The field indicates that there are no other TCI states associated with the code point (N-1) of the DCI Transport Configuration Indication field.

[0181] In another embodiment, the simultaneousTCI-CellListId configured by RRC is not required, but as Figure 20 As shown, a more flexible way of providing the service cell ID is offered. Figure 20 In the cell group, the M field indicates whether an additional serving cell ID exists within the cell group. A value of '1' indicates that an additional serving cell ID exists within the cell group, and its TCI status ID is selected down for the DCI code point in the remaining bytes of the octet. A value of '0' indicates that the serving cell ID in the current octet is the last one in the cell group. The cell group consists of: N cells given (N-1) serving cell IDs, where the serving cell IDs correspond to F=1 in the consecutive octets; and an additional serving cell whose serving cell ID is given F=0 in the subsequent octets. Note that although the M field is described here in the context of PDSCH MAC CE, it can also be applied to PDCCH MAC CE. The only difference is that MAC CE gives the TCI status of all PDCCHs for the listed serving cells and BWP, rather than giving the TCI status mapped to DCI code points.

[0182] Figure 21 The operation of a network node and UE 1112 according to at least some aspects of the above embodiments is illustrated. Optional steps are indicated by dashed lines / boxes. Note that the network node may be a network node that provides joint scheduling for multiple TRPs of multi-PDSCH transmission (e.g., see [link to documentation]). Figure 6 For example, a network node could be base station 1102, which acts as one of the TRPs for multiple PDSCH transmissions (where other TRPs for multiple PDSCH transmissions could be, for example, another base station 1102 or a low-power node 1106). Alternatively, separate scheduling can be performed for multiple PDSCH transmissions (e.g., see...). Figure 7 In the case of a network node, it may be, for example, a network node in which a single scheduler is implemented, or alternatively, it may be divided into multiple network nodes, at which a corresponding scheduler is implemented (i.e., in some embodiments, ...). Figure 21 The function shown as being performed by a "network node" can be performed by two or more network nodes. Alternatively, individual network nodes for a single TRP can each perform the function independently. Figure 18 The functions are related to the PDSCH / PDSH layer group transmission of the corresponding TRP.

[0183] As shown in the figure, the network node can configure UE 1112 using a CC list (for which simultaneous TCI state updates are enabled) (step 2100). As discussed above, the CC list is limited to (i.e., only includes) CCs that have enabled multi-PDSCH transmission based on multiple PDCCH or multi-PDSCH transmission based on a single PDCCH. The network node transmits or initiates a MAC CE for TCI state activation or deactivation to UE 1112, and UE 1112 receives the MAC CE (step 2102). As discussed above, the MAC CE includes information that one or more TCI states are (simultaneously) activated for all CCs included in the CC list (for which simultaneous TCI state updates are enabled). Furthermore, as described herein, the information included in the MAC CE will be mapped to each code point of the DCI transmission configuration indication field through up to X (e.g., X=2) of the TCI states activated by the MAC CE.

[0184] A network node can transmit or initiate a PDCCH transmission including a DCI, wherein the DCI transmission configuration indication field is set to a specific code point mapped to one or more TCI states for use in at least one PDSCH scheduled by the DCI, and UE 1112 receives the PDCCH (step 2104). The PDCCH is used for multiple PDSCH transmission based on multiple PDCCHs or multiple PDSCH transmission based on a single PDCCH, using at least one CC from a configured CC list for simultaneous TCI state updates. UE 1112 determines the active one or more TCI states mapped to a specific code point included in the DCI transmission configuration indication field of the received DCI (step 2106). The determined one or more TCI states are then used to transmit the scheduled one or more PDSCHs, and are used by UE 1112 to receive the scheduled one or more PDSCHs (step 2108).

[0185] Example 3

[0186] In some scenarios, the maximum number of TCI states that can be activated can exceed the number of code points in the DCI transport configuration indication field. Consider a case where there exists T... max= Eight TCI states can be activated, and PDSCH reception based on multiple PDCCHs is configured for a given serving cell. Consider a case where two bits corresponding to four code points exist in the DCI transmission configuration indication field. In this case, it is possible to activate four TCI states with a first PDCCH that schedules the first PDSCH, and activate another four TCI states with a second PDCCH that schedules the second PDSCH. However, when such activation of different sets of TCI states is provided via MAC CE, UE 1112 needs to know which PDCCH the TCI states activated via MAC CE should be used with.

[0187] The maximum number of unique TCI status IDs indicated by MAC CE is limited to T. max In NR Rel-16, T agrees. max It is eight (8). Figure 17 An example MAC CE is shown, in which 10 TCI status IDs are indicated by the following mapping to code points in the DCI transport configuration indication field.

[0188] Since each CORESET pool, consisting of one or more CORESETs, corresponds to a TRP transmitting a PDCCH, in one embodiment, the CORESET pool index can be indicated as part of the MAC CE. Based on the CORESET pool index, UE1112 knows the activated TCI state and the associated code point-to-TCI state mapping that should be applied to the PDCCH carried within a CORESET in the CORESET pool. The advantage of this embodiment is that the TCI state activation and code point-to-TCI state mapping for the two TRPs transmitting two PDCCHs to UE1112 can be provided to UE1112 via a separate MAC CE.

[0189] In an alternative embodiment, TCI state activation and code point-to-TCI state mapping for two TRPs can be provided simultaneously within the same MAC CE. This is accomplished by indicating the set of TCI state IDs to be activated and, for each TCI state ID, indicating the associated CORESET pool index of the TCI state ID.

[0190] In another alternative embodiment, a CORESET pool index may be implicitly provided that is associated with the MAC CE that activates the TCI state and provides a code point-to-TCI state mapping for the TRP. The CORESET pool index is known to UE 1112 as a pool of CORESETs carrying PDCCHs used to schedule PDSCHs carrying TCI state indication MAC CEs.

[0191] Figure 22 The operation of a network node and UE 1112 according to at least some aspects of the above embodiments is illustrated. Optional steps are indicated by dashed lines / boxes. Note that the network node may be a network node that provides joint scheduling for multiple TRPs of multi-PDSCH transmission (e.g., see [link to documentation]). Figure 6 For example, a network node could be base station 1102, which acts as one of the TRPs for multiple PDSCH transmissions (where other TRPs for multiple PDSCH transmissions could be, for example, another base station 1102 or a low-power node 1106). Alternatively, separate scheduling can be performed for multiple PDSCH transmissions (e.g., see...). Figure 7 In the case of a network node, it may be, for example, a network node in which a single scheduler is implemented, or alternatively, it may be divided into multiple network nodes, at which a corresponding scheduler is implemented (i.e., in some embodiments, ...). Figure 21 The function shown as being performed by a "network node" can be performed by two or more network nodes. Alternatively, individual network nodes for a single TRP can each perform the function independently. Figure 18 The functions are related to the PDSCH / PDSH layer group transmission of the corresponding TRP.

[0192] As shown in the figure, the network node transmits or initiates a MAC CE for TCI state activation or deactivation to UE 1112, and UE 1112 receives the MAC CE (step 2200). As discussed above, the MAC CE includes information for activating one or more TCI states and defining a code point-to-TCI state mapping that maps each code point in the DCI transport configuration indication field to up to X (e.g., X = 2) TCI states activated by the MAC CE. Furthermore, as described above, in one embodiment, the MAC CE includes a CORESET pool ID indicating the TCI state activated by the MAC CE, and the code point-to-TCI state mapping defined by the information included in the MAC CE will be applied to one or more PDCCHs carried in any CORESET within the CORESET pool indicated by the CORESET pool ID.

[0193] A network node can transmit or initiate the transmission of a PDCCH carried within a CORSET in the CORESET pool indicated by the CORESET pool ID (step 2202). The PDCCH includes a DCI, wherein the DCI transmission configuration indication field is set to a specific code point mapped to one or more TCI states for use with at least one PDSCH scheduled by the DCI, and the UE 1112 receives the PDCCH. The UE 1112 determines the active one or more TCI states mapped to the specific code point included in the received DCI transmission configuration indication field (step 2204). The determined one or more TCI states are then used to transmit the scheduled one or more PDSCHs and are used by the UE 1112 to receive the scheduled one or more PDSCHs (step 2206).

[0194] Additional descriptions and aspects

[0195] Figure 23 This is a schematic block diagram of a network node 2300 according to some embodiments of the present disclosure. Optional features are indicated by dashed boxes. The network node 2300 may be, for example... Figure 18 Network nodes (which can be, for example, radio network nodes, such as, for example, base stations 1102 or 1106) or implementations as described herein Figure 18 The network node is a fully or partially functional network node. As shown, network node 2300 includes a control system 2302, which includes one or more processors 2304 (e.g., a central processing unit (CPU), application-specific integrated circuit (ASIC), field-programmable gate array (FPGA), and / or the like), memory 2306, and network interface 2308. The one or more processors 2304 are also referred to herein as processing circuitry. Furthermore, if network node 2300 is a radio access node, it may include one or more radio units 2310, each radio unit 2310 including one or more transmitters 2312 and one or more receivers 2314 coupled to one or more antennas 2316. Radio units 2310 may be referred to as or part of radio interface circuitry. In some embodiments, radio units(one or more) 2310 are external to control system 2302 and connected to control system 2302 via, for example, a wired connection (e.g., fiber optic cable). However, in some other embodiments, radio units(one or more) 2310, and potentially also antennas(one or more) 2316, are integrated with control system 2302. One or more processors 2304 operate to provide one or more functions of network node 2300 as described herein (e.g., as above regarding...). Figure 18(One or more functions of the network node). In some embodiments, one or more functions are implemented in software, which is stored, for example, in memory 2306 and executed by one or more processors 2304.

[0196] Figure 24 This is a schematic block diagram illustrating a virtualized embodiment of network node 2300 according to some embodiments of the present disclosure. Optional features are also indicated by dashed boxes. As used herein, a “virtualized” network node is an implementation of network node 2300 in which at least a portion of the functionality of network node 2300 (e.g., via one or more virtual machines executed on one or more physical processing nodes in one or more networks) is implemented as one or more virtual components. As shown in this example, network node 2300 includes one or more processing nodes 2400 coupled to or included as part of one or more networks 2402. Each processing node 2400 includes one or more processors 2404 (e.g., CPU, ASIC, FPGA, and / or the like), memory 2406, and network interface 2408. Furthermore, if network node 2300 is a radio access node, network node 2300 may include a control system 2302 and / or one or more radio units 2310, as described above. If present, the control system 2302 or (one or more) radio units are connected to (one or more) processing nodes 2400 via network 2402.

[0197] In this example, the function 2410 of the network node 2300 described herein (e.g., as mentioned above regarding...) Figure 18One or more functions of the network node may be distributed or implemented at one or more processing nodes 2400 and control system 2302 and / or (one or more) radio units 2310 in any desired manner. In some specific embodiments, some or all of the functions 2410 of the network node 2300 described herein are implemented as virtual components executed by one or more virtual machines, which are implemented in one or more virtual environments hosted by one or more processing nodes 2400. As will be appreciated by those skilled in the art, additional signaling or communication between one or more processing nodes 2400 and control system 2302 is used to implement at least some of the desired functions 2410. It is worth noting that in some embodiments, control system 2302 may be omitted, in which case one or more radio units 2310 communicate directly with one or more processing nodes 2400 via one or more appropriate network interfaces.

[0198] In some embodiments, a computer program is provided that includes instructions, which, when executed by at least one processor, cause the at least one processor to perform one or more functions 2410 of the network node 2300 according to any embodiment described herein or in a virtual environment (e.g., as described above regarding...). Figure 18 The functionality of a node (e.g., processing node 2400) that includes one or more functions of the network node. In some embodiments, a carrier comprising the aforementioned computer program product is provided. The carrier is one of the following: an electronic signal, an optical signal, a radio signal, or a computer-readable storage medium (e.g., a non-transitory computer-readable medium such as a memory).

[0199] Figure 25 This is a schematic block diagram of a network node 2300 according to some other embodiments of the present disclosure. The network node 2300 includes one or more modules 2500, each module 2500 being implemented in software. The modules (one or more) 2500 provide the functionality of the network node 2300 described herein (e.g., as described above regarding...). Figure 18 (One or more functions of the network node mentioned above). This discussion is equally applicable. Figure 24 The processing node 2400, wherein the module 2500 may be implemented at one of the processing nodes 2400, or distributed across multiple processing nodes 2400, and / or distributed across (one or more) processing nodes 2400 and control system 2302.

[0200] Figure 26This is a schematic block diagram of a wireless communication device 2600 according to some embodiments of the present disclosure. The wireless communication device 2600 may be, for example, UE 1112 or the UE described herein. As shown, the wireless communication device 2600 includes one or more processors 2602 (e.g., CPU, ASIC, FPGA, and / or such), memory 2604, and one or more transceivers 2606, each transceiver 2606 including one or more transmitters 2608 and one or more receivers 2610 coupled to one or more antennas 2612. As those skilled in the art will understand, the transceiver(s) 2606 includes radio front-end circuitry connected to the antenna(s) 2612, the radio front-end circuitry being configured to modulate signals transmitted between the antenna(s) 2612 and the processor(s) 2602. The processor 2602 is also referred to herein as processing circuitry. The transceiver 2606 is also referred to herein as radio circuitry. In some embodiments, the functionality of the wireless communication device 2600 described above (e.g., above with respect to embodiments 1-3 and...) Figure 18 One or more functions of the UE 1112 may be implemented entirely or partially in software, which may be stored in memory 2604 and executed by processor(s) 2602(s). Note that the wireless communication device 2600 may include... Figure 26 Additional components not shown, such as one or more user interface components (e.g., including displays, buttons, touch screens, microphones, speakers (one or more), and / or input / output interfaces such as these, and / or any other components for allowing information to be input into and / or output from the wireless communication device 2600), power supplies (e.g., batteries and associated power circuitry), etc.

[0201] In some embodiments, a computer program is provided that includes instructions, which, when executed by at least one processor, cause the at least one processor to perform the functionality of a wireless communication device 2600 according to any embodiment described herein (e.g., above with respect to embodiments 1-3 and...). Figure 18 (One or more functions of the UE 1112 described above). In some embodiments, a carrier comprising the aforementioned computer program product is provided. The carrier is one of the following: electronic signal, optical signal, radio signal, or computer-readable storage medium (e.g., a non-transitory computer-readable medium such as a memory).

[0202] Figure 27This is a schematic block diagram of a wireless communication device 2600 according to some other embodiments of the present disclosure. The wireless communication device 2600 includes one or more modules 2700, each module 2700 being implemented in software. The modules (one or more) 2700 provide the functionality of the wireless communication device 2600 described herein (e.g., above with respect to embodiments 1-3 and...). Figure 18 (One or more functions of the UE 1112).

[0203] refer to Figure 28 According to an embodiment, the communication system includes a telecommunications network 2800, such as a 3GPP-type cellular network, which includes an access network 2802 (such as a RAN) and a core network 2804. The access network 2802 includes multiple base stations 2806A, 2806B, and 2806C for each custom-defined coverage area 2808A, 2808B, and 2808C, such as node Bs, eNBs, gNBs, or other types of radio access points (APs). Each base station 2806A, 2806B, and 2806C can be connected to the core network 2804 via a wired or wireless connection 2810. A first UE 2812 located in coverage area 2808C is configured to wirelessly connect to or be paged by the corresponding base station 2806C. A second UE 2814 located in coverage area 2808A can wirelessly connect to the corresponding base station 2806A. Although multiple UEs 2812 and 2814 are shown in this example, the disclosed embodiments are equally applicable to situations where only one UE is in the coverage area or where only one UE is connected to the corresponding base station 2806.

[0204] Telecommunication network 2800 is itself connected to host computer 2816, which may be embodied in the hardware and / or software of a standalone server, a cloud-implemented server, a distributed server, or as a processing resource in a server farm. Host computer 2816 may be owned or controlled by a service provider, or may be operated by or on behalf of a service provider. Connections 2830 and 2820 between telecommunications network 2800 and host computer 2816 may extend directly from core network 2804 to host computer 2816 or via optional intermediate network 2822. Intermediate network 2822 may be one of a public, private, or hosted network, or a combination of more than one of a public, private, or hosted network; intermediate network 2822 (if any) may be a backbone network or the Internet; in particular, intermediate network 2822 may include two or more subnets (not shown).

[0205] Figure 28The communication system as a whole enables connectivity between connected UEs 2812 and 2814 and host computer 2816. This connectivity can be described as an over-the-top (OTT) connection 2824. Host computer 2816 and connected UEs 2812 and 2814 are configured to transmit data and / or signaling via OTT connection 2824 using access network 2802, core network 2804, any intermediate network 2822, and possibly other infrastructure (not shown) as intermediaries. OTT connection 2824 can be transparent in the sense that the participating communication devices traversing OTT connection 2824 are unaware of the routes of uplink and downlink communications. For example, base station 2806 may not need to be informed of past routes of incoming downlink communications containing data originating from host computer 2816 to be forwarded (e.g., transferred) to connected UE 2812. Similarly, base station 2806 does not need to know the future routes of outgoing uplink communications originating from UE 2812 toward host computer 2816.

[0206] According to the embodiments, reference will now be made to Figure 29 Example implementations of the UE, base station, and host computer discussed in the preceding paragraphs are described. In communication system 2900, host computer 2902 includes hardware 2904, which includes a communication interface 2906 configured to establish and maintain wired or wireless connections with interfaces of different communication devices of communication system 2900. Host computer 2902 further includes processing circuitry 2908, which may have storage and / or processing capabilities. In particular, processing circuitry 2908 may include one or more programmable processors, ASICs, FPGAs, or combinations thereof (not shown) suitable for executing instructions. Host computer 2902 further includes software 2910, which is stored in or accessible by host computer 2902 and executable by processing circuitry 2908. Software 2910 includes host application 2912. Host application 2912 is operable to provide services to a remote user (such as UE 2914) connected via an OTT connection 2916 terminated at the host computer 2902. When providing services to the remote user, host application 2912 can provide user data transmitted using the OTT connection 2916.

[0207] The communication system 2900 further includes a base station 2918, which is provided in the telecommunications system and includes hardware 2920 enabling it to communicate with the host computer 2902 and the UE 2914. Hardware 2920 may include a communication interface 2922 for setting up and maintaining wired or wireless connections to different communication devices of the communication system 2900, and for setting up and maintaining connections with the coverage area served by the base station 2918 (in... Figure 29 The UE 2914 (not shown) has at least a radio interface 2924 for a wireless connection 2926. A communication interface 2922 can be configured to facilitate a connection 2928 to a host computer 2902. The connection 2928 can be direct or it can pass through the core network of a telecommunications system (in...). Figure 29 (Not shown) and / or via one or more intermediate networks outside the telecommunications system. In the illustrated embodiment, the hardware 2920 of base station 2918 further includes processing circuitry 2930, which may include one or more programmable processors, ASICs, FPGAs, or combinations thereof (not shown) adapted to execute instructions. Base station 2918 further has software 2932 that is internally stored or accessible via an external connection.

[0208] The communication system 2900 further includes the previously mentioned UE 2914. The hardware 2934 of the UE 2914 may include a radio interface 2936 configured to establish and maintain a wireless connection 2926 with a base station serving the coverage area where the UE 2914 is currently located. The hardware 2934 of the UE 2914 further includes processing circuitry 2938, which may include one or more programmable processors, ASICs, FPGAs, or combinations thereof (not shown) suitable for executing instructions. The UE 2914 further includes software 2940, which is stored in or accessible by the UE 2914 and executable by the processing circuitry 2938. The software 2940 includes a client application 2942. The client application 2942 may be operable to provide services to human or non-human users via the UE 2914 with the support of a host computer 2902. In host computer 2902, the executing host application 2912 can communicate with the executing client application 2942 via OTT connection 2916 terminated at UE 2914 and host computer 2902. When providing services to a user, client application 2942 can receive request data from host application 2912 and provide user data in response to the request data. OTT connection 2916 can transmit both request data and user data. Client application 2942 can interact with the user to generate the user data it provides.

[0209] Notice Figure 29The host computer 2902, base station 2918, and UE 2914 shown can be respectively connected to... Figure 28 The host computer 2816, base station 2806A, 2806B, 2806C, and UE 2812, 2814 are similar to or identical to each other. That is, the internal workings of these entities can be as follows: Figure 29 As shown in the diagram, and independently, the surrounding network topology can be Figure 28 The surrounding network topology.

[0210] exist Figure 29 The OTT connection 2916 has been abstractly depicted to illustrate communication between host computer 2902 and UE 2914 via base station 2918, without explicitly mentioning any intermediate devices or the precise routing of messages through these devices. The network infrastructure can determine the routing, which can be configured to hide the routing from either UE 2914 or the service provider operating host computer 2902. Although OTT connection 2916 is active, the network infrastructure can further make decisions that dynamically change the routing (e.g., based on load balancing considerations or network reconfiguration).

[0211] The wireless connection 2926 between UE 2914 and base station 2918 is based on the teachings of the embodiments described throughout this disclosure. One or more of the various embodiments improve the performance of OTT services provided to UE 2914 using OTT connection 2916, in which wireless connection 2926 forms the final segment. More precisely, the teachings of these embodiments can improve, for example, data rates, and thus provide benefits such as, for example, reduced user latency.

[0212] Measurement procedures may be provided for the purpose of monitoring data rates, latency, and other factors improved by one or more embodiments. Optional network functionality may further exist for reconfiguring the OTT connection 2916 between the host computer 2902 and the UE 2914 in response to changes in measurement results. The measurement procedures and / or network functionality for reconfiguring the OTT connection 2916 may be implemented in the software 2910 and hardware 2904 of the host computer 2902 or in the software 2940 and hardware 2934 of the UE 2914, or both. In some embodiments, sensors (not shown) may be deployed in or associated with communication devices through which the OTT connection 2916 passes; the sensors may participate in the measurement procedure by supplying values ​​of the monitored quantities illustrated above or by supplying values ​​of other physical quantities from which the software 2910, 2940 can calculate or estimate the monitored quantities. Reconfiguration of the OTT connection 2916 may include message formatting, retransmission settings, preferred routing, etc.; the reconfiguration does not need to affect the base station 2918, and it may be unknown or undetectable to the base station 2918. Such processes and functionality can be known and practiced in the art. In some embodiments, measurements may involve dedicated UE signaling that facilitates measurements of throughput, propagation time, latency, etc., of the host computer 2902. Measurements are possible because software 2910 and 2940 prompt the use of the OTT connection 2916 to transmit messages, particularly empty or "dummy" messages, when monitoring propagation time, errors, etc.

[0213] Figure 30 This is a flowchart illustrating a method implemented in a communication system according to one embodiment. The communication system includes a host computer, a base station, and a UE, which may be referenced... Figure 28 and 29 Those described. To simplify this disclosure, this section will only include those related to... Figure 30 Referring to the accompanying drawings. In step 3000, the host computer provides user data. In sub-step 3002 of step 3000 (which may be optional), the host computer provides user data by executing a host application. In step 3004, the host computer initiates a transmission carrying user data to the UE. In step 3006 (which may be optional), in accordance with the teachings of the embodiments described throughout this disclosure, the base station transmits the user data carried in the transmission initiated by the host computer to the UE. In step 3008 (which may also be optional), the UE executes a client application associated with the host application executed by the host computer.

[0214] Figure 31 This is a flowchart illustrating a method implemented in a communication system according to one embodiment. The communication system includes a host computer, a base station, and a UE, which may be referenced in the appendix. Figure 28and 29 Those described. To simplify this disclosure, this section will only include those related to... Figure 31 Refer to the accompanying drawings. In step 3100 of the method, the host computer provides user data. In an optional sub-step (not shown), the host computer provides user data by executing a host application. In step 3102, the host computer initiates a transmission carrying user data to the UE. According to the teachings of the embodiments described throughout this disclosure, the transmission can be carried out via a base station. In step 3104 (which may be optional), the UE receives the user data carried in the transmission.

[0215] Any suitable steps, methods, features, functions, or benefits disclosed herein can be performed by one or more functional units or modules of one or more virtual devices. Each virtual device may include multiple such functional units. These functional units may be implemented via processing circuitry, which may include one or more microprocessors or microcontrollers and other digital hardware, such as digital signal processors (DSPs), application-specific digital logic, etc. The processing circuitry may be configured to execute program code stored in memory, which may include one or more types of memory, such as read-only memory (ROM), random access memory (RAM), cache memory, flash memory devices, optical storage devices, etc. The program code stored in the memory includes program instructions for executing one or more telecommunications and / or data communication protocols and instructions for executing one or more of the techniques described herein. In some implementations, the processing circuitry may be used to cause corresponding functional units to perform corresponding functions according to one or more embodiments of this disclosure.

[0216] While the processes in the figures may illustrate a particular order of operations performed by certain embodiments of this disclosure, it should be understood that such order is exemplary (e.g., alternative embodiments may perform operations in a different order, combine certain operations, overlap certain operations, etc.).

[0217] Some example embodiments of this disclosure are as follows:

[0218] Example 1: A method for indicating TCI state activation of a PDSCH via a MAC CE, the method comprising one or more of the following: configuring a UE with a first number of serving cells for multi-PDSCH reception based on multiple PDCCHs and a second number of serving cells for multi-PDSCH scheduling based on a single PDCCH; indicating in the MAC CE at least one of the serving cells and an associated BWP of the configured serving cells, wherein TCI state activation of the PDSCH applies to the serving cells; receiving a maximum number of TCI states mapped to one or more code points in the TCI field of a DCI, depending on whether the at least one indicated in the serving cell or the BWP is configured for multi-PDSCH reception based on multiple PDCCHs or multi-PDSCH reception based on a single PDCCH; and receiving at least one DCI for scheduling multiple PDSCHs, wherein the TCI state indicated via the TCI field of the DCI applies to the multiple PDSCHs.

[0219] Example 2: According to the method described in Example 1, wherein if at least one of the serving cells or BWPs indicated in the MAC CE is configured for multi-PDSCH reception based on multi-PDCCH, the maximum number of TCI states mapped to one or more code points in the TCI field of the DCI is 1.

[0220] Example 3: According to the method described in Example 1, wherein if at least one of the serving cells or BWPs indicated in the MAC CE is configured for multi-PDSCH reception based on a single PDCCH, the maximum number of TCI states mapped to one or more code points in the TCI field of the DCI is 2.

[0221] Example 4: A method performed by a wireless communication device WCD (1112), the method comprising one or more of the following: receiving (1800) from a network node one or more configurations for one or more configured serving cells of the WCD (1112), the one or more configured serving cells comprising: (a) one or more first serving cells configured for multi-PDSCH reception based on multiple PDCCH, or (b) one or more second cells configured for multi-PDSCH reception based on a single PDCCH, or (c) both (a) and (b); activating / deactivating the applicable MAC in the TCI state of the PDSCH. The CE receives (1802) an indication from at least one serving cell or at least one corresponding BWP among one or more configured serving cells for WCD (1112), and information indicating one or more TCI states activated for at least one serving cell or at least one corresponding BWP; and receives (1804) information indicating the mapping between code points of the TCI field in the DCI and one or more TCI states activated for at least one serving cell or at least one corresponding BWP, wherein, optionally, depending on whether the at least one serving cell is configured for multi-PDSCH reception based on multiple PDCCH or multi-PDSCH reception based on a single PDCCH, the maximum number of TCI states that can be mapped to a single code point of the TCI field in the DCI is limited.

[0222] Example 5: According to the method described in Example 4, receiving (1804) information indicating mapping includes receiving (1804) information indicating mapping in MAC CE.

[0223] Example 6: The method according to Example 4 or 5, wherein at least one serving cell or at least one corresponding BWP is a single serving cell or a single corresponding BWP.

[0224] Example 7: According to the method described in Example 6, one or more of the following are: a single serving cell or a single corresponding BWP is configured for multi-PDSCH reception based on multiple PDCCH, and the maximum number of TCI states of a single code point mapped to the TCI field in the DCI is 1.

[0225] Example 8: According to the method described in Example 6, wherein one or more of the following are: a single serving cell or a single corresponding BWP is configured for multi-PDSCH reception based on a single PDCCH, and the maximum number of TCI states of a single code point mapped to the TCI field in the DCI is 2.

[0226] Example 9: The method according to Example 4 or 5, wherein at least one serving cell or at least one corresponding BWP is two or more serving cells or two or more corresponding BWPs.

[0227] Example 10: According to the method of Example 9, one or more of the following are true: two or more serving cells or two or more corresponding BWPs are configured for multi-PDSCH reception based on multi-PDCCH, and the maximum number of TCI states of a single code point mapped to the TCI field in the DCI is 1.

[0228] Example 11: According to the method of Example 9, one or more of the following are true: two or more serving cells or two or more corresponding BWPs are configured for multi-PDSCH reception based on a single PDCCH, and the maximum number of TCI states of a single code point mapped to the TCI field in the DCI is 2.

[0229] Example 12: The method according to any one of Examples 9 to 11, wherein two or more serving cells or two or more corresponding BWPs are those serving cells or corresponding BWPs corresponding to two or more component carriers in the component carrier list to be used for simultaneous TCI state ID updates.

[0230] Example 13: The method according to any one of Examples 4 to 12 further includes: receiving (1806) at least one DCI of the multi-PDSCH downlink transmission scheduled to WCD (1112); determining (1808) at least one TCI state of the multi-PDSCH downlink transmission based on (one or more) code points provided in (one or more) TCI fields of at least one DCI and (one or more) mappings between the (one or more) code points and (one or more) corresponding TCI states indicated by the obtained information.

[0231] Example 14: The method according to Example 13 further includes receiving (1810) multiple PDSCH downlink transmissions based on at least one TCI state of the multiple PDSCH downlink transmission.

[0232] Example 15: The method according to any one of the foregoing embodiments further includes: receiving user data from the host computer via the transmission.

[0233] Example 16: A method performed by a network node, the method comprising one or more of the following: providing a wireless communication device WCD (1112) with configuration for one or more configured serving cells of the WCD (1112), the one or more configured serving cells comprising: (a) one or more first serving cells configured for multi-PDSCH reception based on multiple PDCCH, or (b) one or more second cells configured for multi-PDSCH reception based on a single PDCCH, or (c) both (a) and (b); activating / deactivating the applicable MAC in the TCI state of the PDSCH. The CE provides the WCD (1112) (1802) with an indication from at least one serving cell or at least one corresponding BWP among one or more configured serving cells for the WCD (1112), and information indicating one or more TCI states activated for at least one serving cell or at least one corresponding BWP; and provides the WCD (1112) (1804) with information indicating the mapping between code points of the TCI field in the DCI and one or more TCI states activated for at least one serving cell or at least one corresponding BWP, wherein, optionally, depending on whether the at least one serving cell is configured for multi-PDSCH reception based on multiple PDCCH or multi-PDSCH reception based on a single PDCCH, the maximum number of TCI states that can be mapped to a single code point of the TCI field in the DCI is limited.

[0234] Example 17: According to the method of Example 16, wherein providing (1804) information indicating mapping includes providing (1804) information indicating mapping in MAC CE.

[0235] Example 18: The method according to Example 16 or 17, wherein at least one serving cell or at least one corresponding BWP is a single serving cell or a single corresponding BWP.

[0236] Example 19: According to the method of Example 18, one or more of the following are true: a single serving cell or a single corresponding BWP is configured for multi-PDSCH reception based on multi-PDCCH, and the maximum number of TCI states of a single code point mapped to the TCI field in the DCI is 1.

[0237] Example 20: According to the method of Example 18, one or more of the following are true: a single serving cell or a single corresponding BWP is configured for multi-PDSCH reception based on a single PDCCH, and the maximum number of TCI states of a single code point mapped to the TCI field in the DCI is 2.

[0238] Example 21: The method according to Example 19 or 17, wherein at least one serving cell or at least one corresponding BWP is two or more serving cells or two or more corresponding BWPs.

[0239] Example 22: According to the method of Example 21, one or more of the following are true: two or more serving cells or two or more corresponding BWPs are configured for multi-PDSCH reception based on multi-PDCCH, and the maximum number of TCI states of a single code point mapped to the TCI field in the DCI is 1.

[0240] Example 23: According to the method of Example 21, one or more of the following are true: two or more serving cells or two or more corresponding BWPs are configured for multi-PDSCH reception based on a single PDCCH, and the maximum number of TCI states of a single code point mapped to the TCI field in the DCI is 2.

[0241] Example 24: The method according to any one of Examples 21 to 23, wherein two or more serving cells or two or more corresponding BWPs are those serving cells or corresponding BWPs corresponding to two or more component carriers in the component carrier list to be used for simultaneous TCI state ID updates.

[0242] Example 25: The method according to any one of Examples 16 to 24 further includes: providing or causing the provision (1806) of at least one DCI for a multi-PDSCH downlink transmission scheduled to WCD (1112), the at least one DCI including at least one TCI field, the at least one TCI field including at least one code point indicating at least one TCI state of the multi-PDSCH downlink transmission according to the indicated mapping.

[0243] Example 26: The method according to Example 26 further includes transmitting or prompting transmission (1810) of the multiple PDSCH downlink transmission based on at least one TCI state of the multiple PDSCH downlink transmission.

[0244] Example 27: The method according to any one of the foregoing embodiments further includes: obtaining user data from a host computer; and forwarding the user data to the wireless communication device.

[0245] Example 28: A wireless communication device, the wireless communication device comprising: a processing circuit configured to perform any one of the steps in any one of Examples 4-15; and a power supply circuit configured to supply power to the wireless communication device.

[0246] Example 29: A network node comprising: a processing circuit configured to perform any one of the steps described in any one of 16-27; and a power supply circuit configured to supply power to the network node.

[0247] Example 30: A User Equipment (UE) comprising: an antenna configured to transmit and receive wireless signals; a radio front-end circuit connected to the antenna and connected to a processing circuit, and configured to modulate signals transmitted between the antenna and the processing circuit; the processing circuit configured to perform any one of the steps in any of Examples 4-15; an input interface connected to the processing circuit and configured to allow information to be input into the UE for processing by the processing circuit; an output interface connected to the processing circuit and configured to output information processed by the processing circuit from the UE; and a battery connected to the processing circuit and configured to supply power to the UE.

[0248] Example 31: A communication system including a host computer, comprising: processing circuitry configured to provide user data; and a communication interface configured to forward the user data to a cellular network for transmission to a user equipment (UE); wherein the cellular network includes a base station having a radio interface and processing circuitry, the processing circuitry of the base station being configured to perform any one of the steps described in any one of 16-27.

[0249] Example 32: The communication system according to the foregoing examples also includes a base station.

[0250] Example 33: The communication system according to the first two examples further includes the UE, wherein the UE is configured to communicate with the base station.

[0251] Example 34: A communication system according to the first three examples, wherein: the processing circuit of the host computer is configured to execute a host application to provide the user data; and the UE includes a processing circuit configured to execute a client application associated with the host application.

[0252] Example 35: A method implemented in a communication system including a host computer, a base station, and a user equipment (UE), the method comprising: providing user data at the host computer; and initiating a transmission carrying the user data to the UE via a cellular network including the base station at the host computer, wherein the base station performs any one of the steps described in any one of 16-27.

[0253] Example 36: The method according to the foregoing embodiments further includes transmitting the user data at the base station.

[0254] Example 37: The method according to the first two examples, wherein the user data is provided at the host computer by executing a host application, the method further includes executing a client application associated with the host application at the UE.

[0255] Example 38: A user equipment (UE) configured to communicate with a base station, the UE including a radio interface and processing circuitry configured to perform the methods described in the first three examples.

[0256] Example 39: A communication system including a host computer, comprising: processing circuitry configured to provide user data; and a communication interface configured to forward the user data to a cellular network for transmission to a user equipment (UE); wherein the UE includes a radio interface and processing circuitry, and components of the UE are configured to perform any one of the steps in any of Examples 4-15.

[0257] Example 40: The communication system according to the foregoing embodiments, wherein the cellular network further includes a base station configured to communicate with the UE.

[0258] Example 41: A communication system according to the preceding two examples, wherein: the processing circuit of the host computer is configured to execute a host application to provide the user data; and the processing circuit of the UE is configured to execute a client application associated with the host application.

[0259] Example 42: A method implemented in a communication system including a host computer, a base station, and a user equipment (UE), the method comprising: providing user data at the host computer; and initiating a transmission carrying the user data to the UE via a cellular network including the base station at the host computer, wherein the UE performs any one of the steps in any of Examples 4-15.

[0260] Example 43: The method according to the foregoing embodiments further includes receiving the user data from the base station at the UE.

[0261] At least some of the following abbreviations may be used in this disclosure. If there is inconsistency between the abbreviations, preference should be given to how they are used above. If listed multiple times below, the first listing should be preferred over any subsequent listing(s).

[0262] • 3GPP Third Generation Partnership Project

[0263] • 5G (Fifth Generation)

[0264] • 5GC fifth-generation core

[0265] • 5GS Fifth Generation System

[0266] • AF Application Functions

[0267] • AMF Access and Mobility Functions

[0268] • AN access network

[0269] • AP Access Point

[0270] • ASIC (Application-Specific Integrated Circuit)

[0271] • AUSF Authentication Server Functionality

[0272] • CPU (Central Processing Unit)

[0273] • DN Data Network

[0274] • DSP Digital Signal Processor

[0275] • eNB Enhanced or Evolved Node B

[0276] • EPS Evolution Grouping System

[0277] • E-UTRA Evolution Universal Terrestrial Radio Access

[0278] • FPGA (Field Programmable Gate Array)

[0279] • gNB New Radio Base Station

[0280] • gNB-DU New Radio Base Station Distributed Unit

[0281] • HSS (Home Subscriber Server)

[0282] • IoT (Internet of Things)

[0283] • IP Internet Protocol

[0284] • LTE Long Term Evolution

[0285] • MME (Mobility Management Entity)

[0286] • MTC Machine Type Communication

[0287] • NEF Network Open Functionality

[0288] • NF Network Functions

[0289] • NR New Radio

[0290] • NRF Network Functions Storage Function

[0291] • NSSF network slice selection function

[0292] • OTT over-the-top

[0293] PC (Personal Computer)

[0294] • PCF policy control function

[0295] • P-GW Packet Data Network Gateway

[0296] • QoS (Quality of Service)

[0297] • RAM (Random Access Memory)

[0298] • RAN Radio Access Network

[0299] • ROM (Read-Only Memory)

[0300] • RRH Remote Radio Header

[0301] • RTT round trip time

[0302] • SCEF service capability exposure function

[0303] • SMF Session Management Function

[0304] • UDM Unified Data Management

[0305] • UE (User Equipment)

[0306] • UPF User Plane Functions

[0307] Those skilled in the art will recognize improvements and modifications to the embodiments of this disclosure. All such improvements and modifications are considered to be within the scope of the concepts disclosed herein.

Claims

1. A method performed by a wireless communication device (1112) in a cellular communication system (1100), the method comprising: • Receive (1802-1804) a Media Access Control (MAC) control element (CE) from the network node for transmitting a configuration indication of TCI status activation or deactivation, the MAC CE including information: ○ Activate one or more TCI states of a specific serving cell and / or bandwidth portion BWP of the wireless communication device (1112), wherein the specific serving cell and / or BWP is configured for transmission of a multi-physical downlink shared channel PDSCH based on a multi-physical downlink control channel PDCCH; as well as ○ Map at most one of the one or more TCI states activated by the MAC CE to each of the multiple code points in the downlink control information (DCI) transmission configuration indication field; as well as • Receive (1806) a PDCCH including a DCI, wherein the DCI transport configuration indication field is set to a specific code point from the plurality of code points of the DCI transport configuration indication field; as well as • Based on the specific code point included in the DCI and the information included in the MAC CE that maps at most one of the one or more TCI states activated by the MAC CE to each of the plurality of code points in the DCI transport configuration indication field, determine (1808) the TCI state for PDSCH scheduled by the DCI from the one or more TCI states activated by the MAC CE.

2. The method according to claim 1, wherein, The PDSCH scheduled by the DCI is part of a multi-PDSCH transmission based on multi-PDCCH.

3. The method according to claim 1 or 2, further comprising receiving (1810) the PDSCH scheduled by the DCI.

4. A wireless communication device (1112) for a cellular communication system (1100), said wireless communication device (1112) being adapted to: • Receive (1802-1804) a Media Access Control (MAC) control element (CE) from the network node for transmitting a configuration indication of TCI status activation or deactivation, the MAC CE including information: ○ Activate one or more TCI states of a specific serving cell and / or bandwidth portion BWP of the wireless communication device (1112), wherein the specific serving cell and / or BWP is configured for transmission of a multi-physical downlink shared channel PDSCH based on a multi-physical downlink control channel PDCCH; as well as ○ Map at most one of the one or more TCI states activated by the MAC CE to each of the multiple code points in the downlink control information (DCI) transmission configuration indication field; as well as • Receive (1806) a PDCCH including a DCI, wherein the DCI transport configuration indication field is set to a specific code point from the plurality of code points of the DCI transport configuration indication field; as well as • Based on the specific code point included in the DCI and the information included in the MAC CE that maps at most one of the one or more TCI states activated by the MAC CE to each of the plurality of code points in the DCI transport configuration indication field, determine (1808) the TCI state for PDSCH scheduled by the DCI from the one or more TCI states activated by the MAC CE.

5. The wireless communication device (1112) according to claim 4, wherein, The wireless communication device (1112) is also adapted to perform the method according to any one of claims 2 to 3.

6. A wireless communication device (1112) for a cellular communication system (1100), the wireless communication device (1112) comprising: • One or more transmitters (2608); • One or more receivers (2610); as well as • A processing circuit (2602) associated with the one or more transmitters (2608) and the one or more receivers (2610), the processing circuit (2602) being configured to cause the wireless communication device (1112) to: ○ Receive (1802-1804) a Media Access Control (MAC) control element (CE) for transmitting a configuration indication of TCI status activation or deactivation from a network node, the MAC CE including information: ■ Activate one or more TCI states of a specific serving cell and / or bandwidth portion BWP of the wireless communication device (1112), wherein the specific serving cell and / or BWP is configured for transmission of a multi-physical downlink shared channel PDSCH based on a multi-physical downlink control channel PDCCH; as well as ■ Map at most one of the one or more TCI states activated by the MAC CE to each of the multiple code points in the downlink control information (DCI) transmission configuration indication field; as well as ○ Receive (1806) a PDCCH including a DCI, wherein the DCI transport configuration indication field is set to a specific code point from the plurality of code points of the DCI transport configuration indication field; as well as Based on the specific code point included in the DCI and the information included in the MAC CE that maps at most one of the one or more TCI states activated by the MAC CE to each of the plurality of code points in the DCI transport configuration indication field, determine (1808) the TCI state for PDSCH scheduled by the DCI from the one or more TCI states activated by the MAC CE.

7. A method performed by a network node in a cellular communication system (1100), the method comprising: • Transmitting or initiating transmission (1802-1804) to the wireless communication device (1112) for transmitting a Media Access Control (MAC) control element (CE) that configures the TCI state to be activated or deactivated, the MAC CE including information: ○ Activate one or more TCI states of a specific serving cell and / or bandwidth portion BWP of the wireless communication device (1112), wherein the specific serving cell is configured for transmission of a multi-physical downlink shared channel PDSCH based on a multi-physical downlink control channel PDCCH; as well as ○ Map at most one of the one or more TCI states activated by the MAC CE to each of the multiple code points in the downlink control information (DCI) transmission configuration indication field; as well as • Transmit or initiate transmission (1806) PDCCH to the wireless communication device (1112), the PDCCH including DCI, in which the DCI transmission configuration indication field is set to a specific code point from the plurality of code points of the DCI transmission configuration indication field, the specific code point being mapped to the desired TCI state of the PDSCH scheduled by the DCI.

8. The method according to claim 7, wherein, The PDSCH scheduled by the DCI is part of a multi-PDSCH transmission based on multi-PDCCH.

9. The method of claim 7 or 8, further comprising transmitting or initiating a transmission (1810) of the PDSCH scheduled by the DCI.

10. A network node for a cellular communication system (1100), the network node being adapted to: • Transmitting or initiating transmission (1802-1804) to the wireless communication device (1112) for transmitting a Media Access Control (MAC) control element (CE) that configures the TCI state to be activated or deactivated, the MAC CE including information: ○ Activate one or more TCI states of a specific serving cell and / or bandwidth portion BWP of the wireless communication device (1112), wherein the specific serving cell and / or BWP is configured for transmission of a multi-physical downlink shared channel PDSCH based on a multi-physical downlink control channel PDCCH; as well as ○ Map at most one of the one or more TCI states activated by the MAC CE to each of the multiple code points in the downlink control information (DCI) transmission configuration indication field; as well as • Transmit or initiate transmission (1806) PDCCH to the wireless communication device (1112), the PDCCH including DCI, in which the DCI transmission configuration indication field is set to a specific code point from the plurality of code points of the DCI transmission configuration indication field, the specific code point being mapped to the desired TCI state of the PDSCH scheduled by the DCI.

11. The network node according to claim 10, wherein, The network node is also adapted to perform the method according to any one of claims 8 to 9.

12. A network node (2300) for a cellular communication system (1100), the network node (2300) including processing circuitry (2304; 2404) configured to cause the network node (2300): • Transmitting or initiating transmission (1802-1804) to the wireless communication device (1112) for transmitting a Media Access Control (MAC) control element (CE) that configures the TCI state to be activated or deactivated, the MAC CE including information: ○ Activate one or more TCI states of a specific serving cell and / or bandwidth portion BWP of the wireless communication device (1112), wherein the specific serving cell and / or BWP is configured for transmission of a multi-physical downlink shared channel PDSCH based on a multi-physical downlink control channel PDCCH; as well as ○ Map at most one of the one or more TCI states activated by the MAC CE to each of the multiple code points in the downlink control information (DCI) transmission configuration indication field; as well as • Transmit or initiate transmission (1806) PDCCH to the wireless communication device (1112), the PDCCH including DCI, in which the DCI transmission configuration indication field is set to a specific code point from the plurality of code points of the DCI transmission configuration indication field, the specific code point being mapped to the desired TCI state of the PDSCH scheduled by the DCI.

13. A method performed by a wireless communication device (1112) in a cellular communication system (1100), the method comprising: Receive (2102) from network node a Media Access Control (MAC) control element (CE) for transmitting a configuration indication of TCI status activation or deactivation, the MAC CE including information: Activating one or more TCI states of multiple component carriers (CCs), wherein the multiple component carriers (CCs) are included in a configured CC list that enables transmission configuration indicating TCI state updates, wherein the configured CC list includes only CCs that have enabled multi-physical downlink shared channel (PDSCH) transmission based on a multi-physical downlink control channel (PDCCH) or enabled single-PDSCH or multi-PDSCH transmission based on a single PDCCH; and Up to X TCI states from the one or more TCI states activated by the MAC CE are mapped to each of the multiple code points in the Downlink Control Information (DCI) Transmission Configuration Indication field, where X is an integer greater than or equal to 1.

14. The method according to claim 13, wherein, X=1。 15. The method according to claim 13, wherein, X=2。 16. The method according to any one of claims 13 to 15, further comprising: Receive (2104) a PDCCH including a DCI, wherein the DCI transport configuration indication field is set to a specific code point from the plurality of code points in the DCI transport configuration indication field, the PDCCH being a PDCCH for multi-PDSCH based multi-PDCCH transmission or single-PDSCH or multi-PDSCH based single-PDCCH transmission over one or more of the plurality of CCs included in the configured CC list; and Based on the specific code points included in the DCI and the information included in the MAC CE that maps up to X TCI states among the one or more TCI states activated by the MAC CE to each of the multiple code points in the DCI transport configuration indication field, at least one TCI state for at least one PDSCH scheduled by the DCI is determined (2106) from the one or more TCI states activated by the MAC CE.

17. The method according to claim 16, wherein, The at least one PDSCH scheduled by the DCI is part of a multi-PDSCH transmission based on multi-PDCCH.

18. The method of claim 16, further comprising receiving (2108) the at least one PDSCH scheduled by the DCI.

19. The method according to any one of claims 13 to 15, further comprising receiving (2100) the configured CC list with simultaneous TCI state update enabled from a network node.

20. A wireless communication device (1112) for a cellular communication system (1100), said wireless communication device (1112) being adapted to: Receive (2102) from network node a Media Access Control (MAC) control element (CE) for transmitting a configuration indication of TCI status activation or deactivation, the MAC CE including information: Activate one or more TCI states of multiple component carriers (CCs), wherein the multiple component carriers (CCs) are included in a configured CC list that enables transmission configuration indicating TCI state updates, wherein... The configured CC list includes only CCs that have enabled multi-physical downlink shared channel PDSCH transmission based on multi-physical downlink control channel PDCCH or enabled single PDSCH or multi-PDSCH transmission based on single PDCCH. as well as Up to X TCI states from the one or more TCI states activated by the MAC CE are mapped to each of the multiple code points in the Downlink Control Information (DCI) Transmission Configuration Indication field, where X is an integer greater than or equal to 1.

21. The wireless communication device (1112) according to claim 20, wherein, The wireless communication device (1112) is also adapted to perform the method according to any one of claims 14 to 19.

22. A wireless communication device (1112) for a cellular communication system (1100), the wireless communication device (1112) comprising: • One or more transmitters (2608); • One or more receivers (2610); as well as • A processing circuit (2602) associated with the one or more transmitters (2608) and the one or more receivers (2610), the processing circuit (2602) being configured to cause the wireless communication device (1112) to receive (2102) a Media Access Control (MAC) control element (CE) for transmitting a configuration indication of TCI state activation or deactivation, the MAC CE including information: ○ Activate one or more TCI states of multiple component carriers (CCs), wherein the multiple component carriers (CCs) are included in a configured CC list that enables transmission configuration indicating TCI state updates, wherein the configured CC list includes only CCs that have enabled multi-physical downlink shared channel (PDSCH) transmission based on a multi-physical downlink control channel (PDCCH) or enabled single-PDSCH or multi-PDSCH transmission based on a single PDCCH; and ○ Map up to X TCI states from one or more TCI states activated by the MAC CE to each of a plurality of code points in the downlink control information (DCI) transmission configuration indication field, where X is an integer greater than or equal to 1.

23. A method performed by a network node in a cellular communication system (1100), the method comprising: Transmitting or initiating transmission (2102) to the wireless communication device (1112) for transmitting a Media Access Control (MAC) control element (CE) for transmitting a configuration indication of TCI state activation or deactivation, the MAC CE including information: Activating one or more TCI states of multiple component carriers (CCs), wherein the multiple component carriers (CCs) are included in a configured CC list that enables transmission configuration indicating TCI state updates, wherein the configured CC list includes only CCs that have enabled multi-physical downlink shared channel (PDSCH) transmission based on a multi-physical downlink control channel (PDCCH) or enabled single-PDSCH or multi-PDSCH transmission based on a single PDCCH; and Up to X TCI states from the one or more TCI states activated by the MAC CE are mapped to each of the multiple code points in the Downlink Control Information (DCI) Transmission Configuration Indication field, where X is an integer greater than or equal to 1.

24. The method according to claim 23, wherein, X=1。 25. The method according to claim 23, wherein, X=2。 26. The method according to any one of claims 23 to 25, further comprising: Transmitting or initiating a transmission (2104) includes a PDCCH of a DCI, in which the DCI transmission configuration indication field is set to a specific code point from the plurality of code points of the DCI transmission configuration indication field; in: The PDCCH is a PDCCH used for multi-PDSCH transmission based on multiple PDCCHs or single-PDSCH or multi-PDSCH transmission based on a single PDCCH over one or more of the plurality of CCs included in the configured CC list; and The specific code point is mapped to at least one TCI state from the one or more TCI states activated by the MAC CE for scheduling by at least one PDSCH via the DCI.

27. The method according to claim 26, wherein, The at least one PDSCH scheduled by the DCI is part of a multi-PDSCH transmission based on multi-PDCCH.

28. The method of claim 26, further comprising transmitting or initiating a transmission (2108) of the at least one PDSCH scheduled by the DCI.

29. The method according to any one of claims 23 to 25, further comprising transmitting or initiating transmission (2100) to the wireless communication device (1112) the configured CC list that enables simultaneous TCI status updates.

30. A network node for a cellular communication system (1100), the network node being adapted to: Transmitting or initiating transmission (2102) to the wireless communication device (1112) for transmitting a Media Access Control (MAC) control element (CE) for transmitting a configuration indication of TCI state activation or deactivation, the MAC CE including information: Activate one or more TCI states of multiple component carriers (CCs), wherein the multiple component carriers (CCs) are included in a configured CC list that enables transmission configuration indicating TCI state updates, wherein... The configured CC list includes only CCs that have enabled multi-physical downlink shared channel PDSCH transmission based on multi-physical downlink control channel PDCCH or enabled single PDSCH or multi-PDSCH transmission based on single PDCCH. as well as Up to X TCI states from the one or more TCI states activated by the MAC CE are mapped to each of the multiple code points in the Downlink Control Information (DCI) Transmission Configuration Indication field, where X is an integer greater than or equal to 1.

31. The network node according to claim 30, wherein, The network node is also adapted to perform the method according to any one of claims 24 to 29.

32. A network node (2300) for a cellular communication system (1100), the network node (2300) including processing circuitry (2304; 2404) configured to cause the network node (2300): Transmitting or initiating transmission (2102) to the wireless communication device (1112) for transmitting a Media Access Control (MAC) control element (CE) for transmitting a configuration indication of TCI state activation or deactivation, the MAC CE including information: Activate one or more TCI states of multiple component carriers (CCs), wherein the multiple component carriers (CCs) are included in a configured CC list that enables transmission configuration indicating TCI state updates, wherein... The configured CC list includes only CCs that have enabled multi-physical downlink shared channel PDSCH transmission based on multi-physical downlink control channel PDCCH or enabled single PDSCH or multi-PDSCH transmission based on single PDCCH. as well as Up to X TCI states from the one or more TCI states activated by the MAC CE are mapped to each of the multiple code points in the Downlink Control Information (DCI) Transmission Configuration Indication field, where X is an integer greater than or equal to 1.

33. A method performed by a wireless communication device (1112) in a cellular communication system (1100), the method comprising: • Receive (2200) a Media Access Control (MAC) control element (CE) from a network node for transmitting a configuration indication of TCI status activation or deactivation, the MAC CE comprising: ○ Information, the information mentioned: ■ Activate one or more TCI states; ■ Define a code point-to-TCI state mapping, wherein the code point-to-TCI state mapping maps each of a plurality of code points in the downlink control information (DCI) transmission configuration indication field to at most X TCI states among the one or more TCI states activated by the MAC CE, where X is an integer greater than or equal to 1; and ○ Control Resource Set CORESET Pool Identifier ID, which indicates the one or more TCI states activated by the MAC CE and the code point-to-TCI state mapping defined by the information included in the MAC CE will be applied to the Physical Downlink Control Channel PDCCH, carrying the Physical Downlink Control Channel PDCCH in any CORESET within the CORESET pool indicated by the CORESET Pool ID; • Receive (2202) a PDCCH carried within a CORESET in the CORESET pool indicated by the CORESET pool ID, the PDCCH including a DCI, wherein the DCI transport configuration indication field is set to a specific codepoint from the plurality of codepoints in the DCI transport configuration indication field; and • Based on the information included in the DCI, determine (2204) the TCI state for PDSCH scheduled by the DCI from the one or more TCI states activated by the MAC CE.

34. The method according to claim 33, wherein, X=1。 35. The method according to claim 33, wherein, X=2。 36. The method according to any one of claims 33 to 35, wherein, The PDSCH scheduled by the DCI is part of a multi-PDSCH transmission based on multi-PDCCH.

37. The method according to any one of claims 33 to 35, further comprising receiving (2206) the PDSCH scheduled by the DCI.

38. A wireless communication device (1112) for a cellular communication system (1100), said wireless communication device (1112) being adapted to: • Receive (2200) a Media Access Control (MAC) control element (CE) from a network node for transmitting a configuration indication of TCI status activation or deactivation, the MAC CE comprising: ○ Information, the information mentioned: ■ Activate one or more TCI states; ■ Define a code point-to-TCI state mapping, wherein the code point-to-TCI state mapping maps each of a plurality of code points in the downlink control information (DCI) transmission configuration indication field to at most X TCI states among the one or more TCI states activated by the MAC CE, where X is an integer greater than or equal to 1; and ○ Control Resource Set CORESET Pool Identifier ID, which indicates the one or more TCI states activated by the MAC CE and the code point-to-TCI state mapping defined by the information included in the MAC CE will be applied to the Physical Downlink Control Channel PDCCH, carrying the Physical Downlink Control Channel PDCCH in any CORESET within the CORESET pool indicated by the CORESET Pool ID; • Receive (2202) a PDCCH carried within a CORESET in the CORESET pool indicated by the CORESET pool ID, the PDCCH including a DCI, wherein the DCI transport configuration indication field is set to a specific codepoint from the plurality of codepoints in the DCI transport configuration indication field; and • Based on the information included in the DCI, determine (2204) the TCI state for PDSCH scheduled by the DCI from the one or more TCI states activated by the MAC CE.

39. The wireless communication device (1112) according to claim 38, wherein, The wireless communication device (1112) is also adapted to perform the method according to any one of claims 34 to 37.

40. A wireless communication device (1112) for a cellular communication system (1100), the wireless communication device (1112) comprising: • One or more transmitters (2608); • One or more receivers (2610); as well as • A processing circuit (2602) associated with the one or more transmitters (2608) and the one or more receivers (2610), the processing circuit (2602) being configured to cause the wireless communication device (1112) to: ○ Receive (2200) a Media Access Control (MAC) control element (CE) for transmitting a configuration indication of TCI status activation or deactivation from a network node, the MAC CE comprising: ■ Information, the information stated: • Activate one or more TCI states; • Define a code point-to-TCI state mapping, wherein the code point-to-TCI state mapping maps each of a plurality of code points in the downlink control information (DCI) transmission configuration indication field to at most X TCI states among the one or more TCI states activated by the MAC CE, where X is an integer greater than or equal to 1; and ■ Control Resource Set CORESET Pool Identifier ID, the Control Resource Set CORESET Pool Identifier ID indicating the one or more TCI states activated by the MAC CE and the code point to TCI state mapping defined by the information included in the MAC CE will be applied to the Physical Downlink Control Channel PDCCH, carrying the Physical Downlink Control Channel PDCCH in any CORESET within the CORESET pool indicated by the CORESET Pool ID; ○ Receive (2202) a PDCCH carried within a CORESET in the CORESET pool indicated by the CORESET pool ID, the PDCCH including a DCI, wherein the DCI transport configuration indication field is set to a specific code point from the plurality of code points of the DCI transport configuration indication field; and Based on the information included in the DCI, determine (2204) the TCI state for PDSCH scheduled by the DCI from the one or more TCI states activated by the MAC CE.

41. A method performed by a network node in a cellular communication system (1100), the method comprising: • Transmitting or initiating a transmission (2200) to the wireless communication device (1112) for transmitting a Media Access Control (MAC) control element (CE) that configures the TCI state to be activated or deactivated, the MAC CE comprising: ○ Information, the information mentioned: ■ Activate one or more TCI states; ■ Define a code point-to-TCI state mapping, wherein the code point-to-TCI state mapping maps each of a plurality of code points in the downlink control information (DCI) transmission configuration indication field to at most X TCI states among the one or more TCI states activated by the MAC CE, where X is an integer greater than or equal to 1; and ○ A control resource set CORESET pool identifier ID, which indicates one or more TCI states activated by the MAC CE and the code point-to-TCI state mapping defined by the information included in the MAC CE will be applied to the physical downlink control channel PDCCH, carrying the physical downlink control channel PDCCH in any CORESET within the CORESET pool indicated by the CORESET pool ID; and • Transmit or initiate transmission (2202) to the wireless communication device (1112) a PDCCH carried in a CORESET within a CORESET pool indicated by the CORESET pool ID, the PDCCH including a DCI, in which the DCI transmission configuration indication field is set to a specific code point from the plurality of code points of the DCI transmission configuration indication field.

42. The method according to claim 41, wherein, X=1。 43. The method according to claim 41, wherein, X=2。 44. The method of claim 41, further comprising transmitting or initiating a transmission (2206) of a PDSCH scheduled by the DCI.

45. The method according to claim 44, wherein, The PDSCH scheduled by the DCI is part of a multi-PDSCH transmission based on multi-PDCCH.

46. ​​A network node for a cellular communication system (1100), the network node being adapted to: • Transmitting or initiating a transmission (2200) to the wireless communication device (1112) for transmitting a Media Access Control (MAC) control element (CE) that configures the TCI state to be activated or deactivated, the MAC CE comprising: ○ Information, the information mentioned: ■ Activate one or more TCI states; ■ Define a code point to TCI state mapping, wherein the code point to TCI state mapping maps each of a plurality of code points of the downlink control information DCI transmission configuration indication field to at most X TCI states of one or more TCI states activated by the MAC CE, where X is an integer greater than or equal to 1. as well as ○ A control resource set CORESET pool identifier ID, which indicates one or more TCI states activated by the MAC CE and the code point-to-TCI state mapping defined by the information included in the MAC CE will be applied to the physical downlink control channel PDCCH, carrying the physical downlink control channel PDCCH in any CORESET within the CORESET pool indicated by the CORESET pool ID; and • Transmit or initiate transmission (2202) to the wireless communication device (1112) a PDCCH carried in a CORESET within a CORESET pool indicated by the CORESET pool ID, the PDCCH including a DCI, in which the DCI transmission configuration indication field is set to a specific code point from the plurality of code points of the DCI transmission configuration indication field.

47. The network node according to claim 46, wherein, The network node is also adapted to perform the method according to any one of claims 42 to 45.

48. A network node (2300) for a cellular communication system (1100), the network node (2300) including processing circuitry (2304; 2404) configured to cause the network node (2300): • Transmitting or initiating a transmission (2200) to the wireless communication device (1112) for transmitting a Media Access Control (MAC) control element (CE) that configures the TCI state to be activated or deactivated, the MAC CE comprising: ○ Information, the information mentioned: ■ Activate one or more TCI states; ■ Define a code point to TCI state mapping, wherein the code point to TCI state mapping maps each of a plurality of code points of the downlink control information DCI transmission configuration indication field to at most X TCI states of one or more TCI states activated by the MAC CE, where X is an integer greater than or equal to 1. as well as ○ A control resource set CORESET pool identifier ID, which indicates one or more TCI states activated by the MAC CE and the code point-to-TCI state mapping defined by the information included in the MAC CE will be applied to the physical downlink control channel PDCCH, carrying the physical downlink control channel PDCCH in any CORESET within the CORESET pool indicated by the CORESET pool ID; and • Transmit or initiate transmission (2202) to the wireless communication device (1112) a PDCCH carried in a CORESET within a CORESET pool indicated by the CORESET pool ID, the PDCCH including a DCI, in which the DCI transmission configuration indication field is set to a specific code point from the plurality of code points of the DCI transmission configuration indication field.

49. A computer-readable medium storing a computer program that, when executed on a processor, configures the processor to perform the method according to any one of claims 1-3, 13-19, and 33-37.

50. A computer-readable medium storing a computer program that, when executed on a processor, configures the processor to perform the method according to any one of claims 7-9, 23-29, and 41-45.

51. A computer program product comprising a computer program that, when executed on a processor, configures the processor to perform the method according to any one of claims 1-3, 13-19, and 33-37.

52. A computer program product comprising a computer program that, when executed on a processor, configures the processor to perform the method according to any one of claims 7-9, 23-29, and 41-45.

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