Communication Method and Device

Abstract

Embodiments of the present disclosure relate to a method and apparatus for multi-input multi-output (MIMO) communication. According to an embodiment of the present disclosure, a method may include: transmitting downlink preemption configuration information to a user equipment (UE), wherein the downlink preemption configuration information includes a first indication indicating a start position of a first preemption indication within a first downlink control information (DCI); and transmitting the first DCI including the first preemption indication to the UE. Embodiments of the present disclosure provide a method for preemption indication in multi-TRP transmission.

Description

Technical Field

[0001] Embodiments of the present application generally relate to wireless communication technologies, and in particular, to a method and apparatus for multi-input multi-output (MIMO) communication. Background Art

[0002] Multi-transmit-receive point (multi-TRP) transmission has been introduced into New Radio (NR). During multi-TRP transmission, a TRP (or panel) can be used to transmit data to a first user equipment (UE) having a relatively large transmission delay or latency tolerance, and to transmit data to a second UE having a relatively small transmission delay or latency tolerance. If the data destined for the second UE arrives at the transmission instant of the first UE and if there are not enough resources for non-overlapping data transmission for both the first UE and the second UE, then the data transmission to the second UE will occupy the resources scheduled for the first UE because the second UE may have a relatively small transmission delay or latency tolerance. Summary of the Invention

[0003] Some embodiments of the present application provide a technical solution for preemption indication in multi-TRP transmission.

[0004] According to an embodiment of the present application, a method may include: transmitting downlink preemption configuration information to a UE, where the downlink preemption configuration information may include a first indication indicating a start position of a first preemption indication in a first downlink control information (DCI); and transmitting the first DCI including the first preemption indication to the UE.

[0005] According to another embodiment of the present application, a method may include: receiving, at a UE, first downlink preemption configuration information, where the first downlink preemption configuration information may include a first indication indicating a start position of a first preemption indication in a first DCI; and receiving, at the UE, the first DCI including the first preemption indication.

[0006] Some embodiments of the present application further provide an apparatus, including: at least one non-transitory computer-readable medium storing computer-executable instructions; at least one receiver; at least one transmitter; and at least one processor coupled to the at least one non-transitory computer-readable medium, the at least one receiver, and the at least one transmitter. The computer-executable instructions are programmed to implement any of the above methods by using the at least one receiver, the at least one transmitter, and the at least one processor.

[0007] Embodiments of the present application provide technical solutions for preemption indication in multi-TRP transmission. Therefore, embodiments of the present application can increase the robustness of multi-TRP transmission in a communication network and facilitate the deployment and implementation of NR. Description of the Drawings

[0008] To describe the manner in which the advantages and features of the present application can be obtained, a description of the present application is presented by reference to specific embodiments of the present application illustrated in the drawings. These drawings only depict exemplary embodiments of the present application and should not be considered as limiting the scope of the present application.

[0009] Figure 1 is a schematic diagram illustrating an exemplary wireless communication system according to some embodiments of the present application;

[0010] Figure 2 illustrates a scenario of preemption indication in multi-TRP transmission according to some embodiments of the present application;

[0011] Figure 3 illustrates a scenario of preemption indication in multi-TRP transmission according to some other embodiments of the present application;

[0012] Figure 4 illustrates a scenario of preemption indication in multi-TRP transmission according to still some other embodiments of the present application;

[0013] Figure 5 illustrates a method for preemption indication in multi-TRP transmission according to some embodiments of the present application;

[0014] Figure 6 illustrates a method for preemption indication in multi-TRP transmission according to some other embodiments of the present application;

[0015] Figure 7 illustrates a simplified block diagram of a device for preemption indication in multi-TRP transmission according to some embodiments of the present application; and

[0016] Figure 8 illustrates a simplified block diagram of a device for preemption indication in multi-TRP transmission according to some other embodiments of the present application. Detailed Description of the Embodiments

[0017] The detailed description of the drawings is intended to be a description of the preferred embodiments of the present application and is not intended to represent the only form in which the present application can be practiced. It should be understood that the same or equivalent functions can be achieved by different embodiments that are also intended to be encompassed within the spirit and scope of the present application.

[0018] Reference will now be made in detail to some embodiments of the present application, examples of which are illustrated in the accompanying drawings.

[0019] A wireless communication system may have one TRP (or panel) or several TRPs (or panels). The TRP may act as a base station. The TRPs may communicate with each other via a backhaul link. Such a backhaul link may be an ideal backhaul link or a non-ideal backhaul link. The latency of an ideal backhaul link may be considered zero, while the latency of a non-ideal backhaul link may be several tens of milliseconds and much greater than that of an ideal backhaul link, for example, about several tens of milliseconds.

[0020] A single TRP, under the control of a base station, may be used to serve one or more UEs. The TRP may represent various communication devices. The base station may also have one or several TRPs. For example, in some application scenarios, in a coordinated multi-point (CoMP) scenario, the TRP may represent a base station. Those skilled in the art should understand that as the 3GPP and communication technologies develop, the terms described in this specification may change, which does not affect the scope of the present application.

[0021] Figure 1 is a schematic diagram illustrating an exemplary wireless communication system according to some embodiments of the present application.

[0022] Reference Figure 1 , the wireless communication system 100 may include a base station 101, TRPs 103 (e.g., TRP 103a and TRP 103b), and UEs 105 (e.g., UE 105a, UE 105b, and UE 105c). Although only one base station 101, two TRPs 103, and three UEs 105 are shown for simplicity, it should be noted that according to some other embodiments of the present application, the wireless communication system 100 may include more or fewer communication devices or equipment.

[0023] In some application scenarios (e.g., in 5G application scenarios), the base station 101 may be referred to as a gNB.

[0024] The TRPs 103 (e.g., TRP 103a and TRP 103b) may communicate with the base station 101 via, for example, a backhaul link. Each of the TRPs 103 may serve some or all of the UEs 105. As Figure 1As shown, TRP 103a can serve some mobile stations (including UE 105a, UE 105b, and UE 105c) within a service area or region (e.g., a cell or a cell sector). TRP 103b can serve some mobile stations (including UE 105a, UE 105b, and UE 105c) within a service area or region (e.g., a cell or a cell sector). TRP 103a and TRP 103b can communicate with each other via, for example, a backhaul link. UE 105a can include a computing device, a wearable device, a mobile device, etc. UE 105b can include a device that is the same as or similar to UE 105a. UE 105b can include a device that is different from UE 105a. UE 105c can include a device that is the same as or similar to UE 105a. UE 105c can include a device that is different from UE 105a.

[0025] According to NR Rel-15, a base station can transmit data for a UE with a relatively large transmission delay or latency tolerance (e.g., an enhanced mobile broadband (eMBB) UE). The base station may also need to transmit data to another UE that may have a relatively small transmission delay or latency tolerance (e.g., a ultra-reliable low latency communication (URLLC) UE).

[0026] If there are not enough resources at the base station or TRP for non-overlapping data transmissions for both eMBB UEs and URLLC UEs, then since URLLC UEs may have a relatively small transmission delay or latency tolerance, the base station or TRP can preempt the resources scheduled (or pre-scheduled) for eMBB UEs to transmit data for URLLC UEs.

[0027] To avoid possible errors that may occur, for example, to avoid errors in data demodulation in eMBB UEs, the TRP or base station can transmit a preemption indication in downlink control information (DCI) (e.g., DCI format 2_1) to indicate to the eMBB UE the resources (e.g., time-frequency resources) to be preempted.

[0028] The solutions discussed above can work in a single TRP transmission. However, in a multi-TRP transmission, data for eMBB UEs can be transmitted from different TRPs via different layers or different PDSCHs, but not all of these TRPs transmit data to URLLC UEs. Therefore, the eMBB UE may not be aware of which layer(s) or which PDSCH(s) will be preempted for data transmission to URLLC UEs.

[0029] In other words, the eMBB UE needs to know which layer(s) (or PDSCH) transmitted from a TRP will be pre-empted by the URLLC UE. Therefore, a pre-emption indication is needed to indicate the resources on the pre-empted layer (or PDSCH) from a TRP for data transmission to the URLLC UE.

[0030] Embodiments of the present application may provide a technical solution that at least solves the above technical problems. More details of the embodiments of the present application will be illustrated below in conjunction with the accompanying drawings.

[0031] Figure 2 Illustrate the scenario of pre-emption indication in multi-TRP transmission according to some embodiments of the present application.

[0032] Refer to Figure 2 , the wireless communication system may include two TRPs 103 (e.g., TRP 103a and TRP 103b) and three UEs 105 (e.g., UE 105a, UE 105b, and UE 105c). UE 105b may be a UE with a relatively large transmission delay or latency tolerance, for example, an eMBB UE. Each of UE 105a and UE 105c may be a UE with a relatively small transmission delay or latency tolerance, for example, a URLLC UE.

[0033] Both TRP 103a and 103b may serve UE 105b. TRP 103a may also serve UE 105a. TRP 103b may further serve UE 105c.

[0034] As Figure 2 shown in, TRP 103a may transmit DCI 21 for scheduling the physical downlink shared channel (PDSCH) transmission to UE 105b. The PDSCH transmission may include a first data transmission 22 transmitted from a first set of demodulation reference signal (DMRS) ports of TRP 103a on a first set of layers and a second transmission 23 transmitted from a second set of DMRS ports of TRP 103b on a second set of layers. Data on each layer may be transmitted from the corresponding DMRS port. The first set of layers may include one or more layers, and the second set of layers may include one or more layers different from the layers included in the first set of layers. The first set of DMRS ports may include one or more DMRS ports, and the second set of DMRS ports may include one or more DMRS ports different from the DMRS ports included in the first set of DMRS ports.

[0035] The DCI 21 may further include a Transmission Configuration Indicator (TCI) code point indicating two TCI states, i.e., a first TCI state and a second TCI state. The first TCI state is associated with a first set of Code Division Multiplexing (CDM) groups of a first set of Demodulation Reference Signal (DMRS) ports including the TRP 103a, and the second TCI state is associated with a second set of CDM groups of a second set of DMRS ports including the TRP 103b. The first set of CDM groups may include one or two CDM groups, and the second set of CDM groups may include one or two CDM groups different from the CDM groups included in the first set of CDM groups.

[0036] At the moment when the data transmissions 22 and 23 are sent to the UE 105b, the Ultra-Reliable and Low-Latency Communication (URLLC) transmission 25 to the UE 105a and / or the URLLC transmission 28 to the UE 105c may reach the TRP 103a and / or the TRP 103b. Assuming that there are not enough resources for non-overlapping transmissions to the UE 105b and URLLC transmissions to the UE 105a and / or the UE 105c, the URLLC transmissions will preempt a part of the resources of the first set of layers from the TRP 103a and / or a part of the resources of the second set of layers from the TRP 103b.

[0037] To indicate the preempted resources of TRP 103a and / or TRP 103b to UE 105b, TRP 103a or TRP 103b may transmit downlink preemption configuration information to UE 105b. The downlink preemption configuration information may be included in multiple higher layer parameters configured by base station 101 through the higher layer. For example, the higher layer may represent a layer higher than the PHY (Physical) layer, such as the RRC (Radio Resource Control) layer. The downlink preemption configuration information may be the "DownlinkPreemption" information element (IE) defined in TS 38.331. The downlink preemption configuration information may include one or more indications (e.g., the positionInDCI field) of a serving cell, and the one or more indications indicate the one or more start positions of one or more preemption indications within DCI 24 (e.g., DCI format 2_1). The downlink preemption configuration information may also include the following: the int-RNTI field defined in TS 38.331, which is used to indicate the interruption radio network temporary identity (INT-RNTI) for monitoring the physical downlink control channel (PDCCH) to convey DCI 24; a set of int-ConfigurationPerServingCell fields, where each int-ConfigurationPerServingCell field indicates the serving cell index defined in TS 38.331; the one or more positionInDCI as described above; and the dci-PayloadSize field defined in TS 38.331, which is used to indicate the payload size for DCI 24.

[0038] In addition, to indicate the preempted resources of TRP 103a and / or TRP 103b to UE 105b, TRP 103b or TRP 103b may also need to transmit DCI 24 (e.g., DCI format 2_1) to UE 105b. DCI 24 may be transmitted in a common search space. In Figure 2 it, assuming that only TRP 103a is configured with at least one common search space, TRP 103a may transmit DCI 24 to UE 105b. The size of DCI 24 may be configured by the higher layer and up to 126 bits. DCI 24 may include one or more preemption indications of a serving cell. Each of the one or more preemption indications may indicate a resource (e.g., time-frequency resource) of a group layer that is not intended to be part of the transmission to UE on it. In an embodiment of this application, the time-frequency resource may be a physical resource block (PRB) and an orthogonal frequency division multiplexing (OFDM) symbol.

[0039] According to some embodiments of the present application, the downlink preemption configuration information may include a first indication (e.g., the positionInDCI1 field) indicating the start position of the first preemption indication in DCI 24 and a second indication (e.g., the positionInDCI2 field) indicating the start position of the second preemption indication in DCI 24. The first preemption indication may be 14-bit information indicating a part of the resources (e.g., PRBs and OFDM symbols) of the first set of layers of the TRP 103a that is not intended for transmission to the UE thereon. The second preemption indication may be 14-bit information indicating a part of the resources (e.g., PRBs and OFDM symbols) of the second set of layers of the TRP 103b that is not intended for transmission to the UE thereon. A part of the resources of a layer may refer to a part or all of the resources of the layer.

[0040] After receiving the downlink preemption configuration information, the UE 105b may first obtain the first preemption indication in DCI 24 based on the positionInDCI1 field and obtain the second preemption indication in DCI 24 based on the positionInDCI2 field. In some embodiments of the present disclosure, the first preemption indication may be a continuous bit stream having 14 bits. The UE 105b may determine the start position of the first preemption indication in DCI 24 based on the positionInDCI1 field and then determine the consecutive 14 bits starting from the start position indicated by the positionInDCI1 field as the first preemption indication. In some other embodiments of the present disclosure, the second preemption indication has a continuous bit stream of 14 bits. The UE 105b may determine the start position of the second preemption indication in DCI 24 based on the positionInDCI2 field, and then determine the consecutive 14 bits starting from the start position indicated by the positionInDCI2 field as the second preemption indication.

[0041] Then, UE 105b may associate the first preemption indication with the first TCI state and the second preemption indication with the second TCI state. Since the first TCI state may be associated with a first set of CDM groups including a first set of DMRS ports and the first set of DMRS ports may be associated with a first set of layers of TRP 103a, UE 105b may determine that the first preemption indication is used to indicate a part of the resources of the first set of layers of TRP 103a that is not intended for transmission to the UE thereon. Similarly, since the second TCI state may be associated with a second set of CDM groups including a second set of DMRS ports and the second set of DMRS ports may be associated with a second set of layers of TRP 103b, UE 105b may determine that the second preemption indication is used to indicate a part of the resources of the second set of layers of TRP 103b that is not intended for transmission to the UE thereon. Therefore, the UE may not decode the data transmission on the first set of layers on the resources indicated by the first preemption indication and may not decode the data transmission on the second set of layers on the resources indicated by the second preemption indication.

[0042] In a case where the resources of the first set of layers from TRP 103a are not preempted by the URLLC transmission, each bit of the first preemption indication may be set to 0 to indicate that the resources of the first set of layers from TRP 103a are not preempted by the URLLC transmission. Similarly, in a case where the resources of the second set of layers from TRP 103b are not preempted by the URLLC transmission, each bit of the second preemption indication may be set to 0 to indicate that the resources of the second set of layers from TRP 103b are not preempted by the URLLC transmission.

[0043] For example, assuming that the first set of layers of TRP 103a includes layer 0 and layer 1, the second set of layers of TRP 103b includes layer 2 and layer 3, the first set of DMRS ports of TRP 103a includes DMRS port 0 and DMRS port 1, and the second set of DMRS ports of TRP 103b includes DMRS port 2 and DMRS port 3, data on layer 0 is transmitted from DMRS port 0, data on layer 1 is transmitted from DMRS port 1, data on layer 2 is transmitted from DMRS port 2, and data on layer 3 is transmitted from DMRS port 3. Also, assuming that the TCI code point may indicate TCI state 1 and TCI state 2, TCI state 1 is associated with CDM group 0 including DMRS port 0 and DMRS port 1, and TCI state 2 is associated with CDM group 1 including DMRS port 2 and DMRS port 3.

[0044] In an example, the downlink preemption configuration information may include a positionInDCI1 field indicating a start position of a first preemption indication in DCI 24 and a positionInDCI2 field indicating a start position of a second preemption indication in DCI 24. The first preemption indication may indicate a part of the resources of layers 0 and 1 that is not intended for transmission to the UE thereon. The second preemption indication may indicate a part of the resources of layers 2 and 3 that is not intended for transmission to the UE thereon. In a case where the resources from TRP 103a on layers 0 and 1 are not preempted by the URLLC transmission, each bit of the first preemption indication may be set to 0 to indicate that the resources from TRP 103a on the first group of layers are not preempted by the URLLC transmission. In a case where the resources from TRP103b on layers 2 and 3 are not preempted by the URLLC transmission, each bit of the first preemption indication may be set to 0 to indicate that the resources from TRP 103b on layers 2 and 3 are not preempted by the URLLC transmission.

[0045] After receiving the downlink preemption configuration information, UE 105b may first obtain the first preemption indication in DCI 24 based on the positionInDCI1 field and obtain the second preemption indication in DCI 24 based on the positionInDCI2 field. Then, UE 105b may associate the first preemption indication with TCI state 1 and associate the first preemption indication with TCI state 2. Since the first TCI state is associated with CDM group 0 including DMRS ports 0 and 1 and DMRS ports 0 and 1 may be associated with layers 0 and 1, UE 105b may determine that the first preemption indication is used to indicate a part of the resources of layers 0 and 1 of TRP 103a that is not intended for transmission to the UE thereon. Similarly, since TCI state 2 may be associated with CDM group 1 including DMRS ports 2 and 3 and DMRS ports 2 and 3 may be associated with layers 2 and 3, UE 105b may determine that the second preemption indication is used to indicate a part of the resources of layers 2 and 3 of TRP 103b that is not intended for transmission to the UE thereon.

[0046] According to some embodiments of the present application, the URLLC transmission may only preempt the resources of one of TRP 103a and TRP 103b. In such a case, only one preemption indication may be sufficient to indicate the preempted resources of one TRP.

[0047] In these embodiments, TRP 103a or TRP 103b may transmit downlink preemption configuration information to UE 105b. The downlink preemption configuration information may be the "DownlinkPreemption" information element (IE) defined in TS 38.331. The downlink preemption configuration information may include an indication indicating the start position of the preemption indication within DCI 24 (e.g., DCI format 2_1). The indication may be the positionInDCI1 field or the positionInDCI2 field in the "DownlinkPreemption" information element (IE).

[0048] In a case where the positionInDCI1 field is included in the downlink preemption configuration information and the positionInDCI2 field is empty, the preemption indication indicated by the positionInDCI1 field may indicate a part of the resources (PRBs and OFDM symbols) of the first set of layers of TRP 103a that is not intended for transmission to the UE thereon.

[0049] In a case where the positionInDCI2 field is included in the downlink preemption configuration information and the positionInDCI1 field is empty, the preemption indication indicated by the positionInDCI2 field may indicate a part of the resources (PRBs and OFDM symbols) of the second set of layers of TRP 103b that is not intended for transmission to the UE thereon.

[0050] After receiving the downlink preemption configuration information, UE 105b may first obtain the preemption indication within DCI 24 based on the positionInDCI1 field or the positionInDCI2 field. In some embodiments of the present disclosure, the preemption indication may be a continuous bit stream having 14 bits. UE 105b may determine the start position of the preemption indication within DCI 24 based on the positionInDCI1 field or the positionInDCI2 field and then determine the consecutive 14 bits starting from the start position indicated by the positionInDCI1 field or the positionInDCI2 field as the preemption indication.

[0051] In a case where the preemption indication is obtained based on the positionInDCI1 field, the UE may associate the preemption indication with the first TCI state. Since the first TCI state may be associated with the first set of CDM groups including the first set of DMRS ports and the first set of DMRS ports may be associated with the first set of layers of TRP 103a, UE 105b may determine that the preemption indication is used to indicate a part of the resources of the first set of layers of TRP 103a that is not intended for transmission to the UE thereon.

[0052] Similarly, in a case where a preemption indication is obtained based on the positionInDCI2 field, the UE may associate the preemption indication with a second TCI state. Since the second TCI state may be associated with a second CDM group including a second set of DMRS ports and the second set of DMRS ports may be associated with a second set of layers of the TRP 103b, the UE 105b may determine that the preemption indication is used to indicate a part of the resources of the second set of layers of the TRP 103b that is not intended for transmission to the UE thereon.

[0053] For example, assume that the first set of layers of the TRP 103a includes layer 0 and layer 1, the second set of layers of the TRP 103b includes layer 2 and layer 3, the first set of DMRS ports of the TRP 103a includes DMRS port 0 and DMRS port 1, and the second set of DMRS ports of the TRP 103b includes DMRS port 2 and DMRS port 3. Then, data on layer 0 is transmitted from DMRS port 0, data on layer 1 is transmitted from DMRS port 1, data on layer 2 is transmitted from DMRS port 2, and data on layer 3 is transmitted from DMRS port 3. Moreover, assume that the TCI code point can indicate TCI state 1 and TCI state 2, and TCI state 1 is associated with CDM group 0 including DMRS port 0 and DMRS port 1, and TCI state 2 is associated with CDM group 1 including DMRS port 2 and DMRS port 3.

[0054] In an example, in a case where the URLLC transmission 25 only preempts resources on layers 0 and 1, the downlink preemption configuration information may only include the positionInDCI1 field. In a case where the URLLC transmission 28 only preempts resources on layers 2 and 3, the downlink preemption configuration information may only include the positionInDCI2 field.

[0055] After receiving the downlink preemption configuration information, the UE 105b may first obtain a preemption indication in the DCI 24 based on the positionInDCI1 field or the positionInDCI2 field. In a case where the preemption indication is obtained based on the positionInDCI1 field, the UE 105b may associate the preemption indication with the TCI state 1. Since the first TCI state is associated with CDM group 0 including DMRS port 0 and 1, and DMRS port 0 and 1 may be associated with layer 0 and layer 1, the UE 105b may determine that the preemption indication is used to indicate a part of the resources of layer 0 and layer 1 of the TRP 103a that is not intended for transmission to the UE thereon.

[0056] Similarly, in a scenario where a preemption indication is obtained based on the positionInDCI2 field, the UE 105b may associate the preemption indication with TCI state 2. Since TCI state 2 may be associated with CDM group 1 including DMRS ports 2 and 3 and DMRS ports 2 and 3 may be associated with layers 2 and 3, the UE 105b may determine that the preemption indication is for indicating a part of the resources of layers 2 and 3 of the TRP 103b that are not intended for transmission to the UE thereon.

[0057] According to some embodiments of the present application, regardless of whether one or two indications for indicating the position of the preemption indication in DCI 24 of a serving cell are included in the downlink preemption configuration information, the TRP 103a or the TRP 103b may transmit configuration information that associates the indication with a TCI state.

[0058] In an embodiment of the present application, the downlink preemption configuration information may include a first indication (e.g., the positionInDCI1 field) indicating the start position of the first preemption indication in DCI 24 and a second indication (e.g., the positionInDCI2 field) indicating the start position of the second preemption indication in DCI 24. In this embodiment, the TRP 103a or the TRP 103b may transmit configuration information that associates the first indication with one of the first TCI state and the second TCI state and associates the second indication with the other of the first TCI state and the second TCI state.

[0059] After receiving the downlink preemption configuration information, the UE 105b may first obtain the first preemption indication in DCI 24 based on the positionInDCI1 field. The UE may also obtain the second preemption indication in DCI 24 based on the positionInDCI2 field. In some embodiments of the present disclosure, the first preemption indication may be a continuous bit stream having 14 bits. The UE 105b may determine the start position of the first preemption indication in DCI 24 based on the positionInDCI1 field and then determine the consecutive 14 bits starting from the start position indicated by the positionInDCI1 field as the first preemption indication. In some other embodiments of the present disclosure, the second preemption indication may be a continuous bit stream having 14 bits. The UE 105b may determine the start position of the second preemption indication in DCI 24 based on the positionInDCI2 field, and then determine the consecutive 14 bits starting from the start position indicated by the positionInDCI2 field as the second preemption indication.

[0060] Based on the configuration information, UE 105b can determine that the first preemption indication indicated by the positionInDCI1 field is associated with one of the first TCI state and the second TCI state, and the second preemption indication indicated by the positionInDCI2 field is associated with the other of the first TCI state and the second TCI state. Since the first TCI state can be associated with a first set of CDM groups including a first set of DMRS ports and the first set of DMRS ports can be associated with a first set of layers, this implies that the first TCI state can be associated with the first set of layers. Similarly, since the second TCI state can be associated with a second set of CDM groups including a second set of DMRS ports and the second set of DMRS ports can be associated with a second set of layers, this implies that the second TCI state can be associated with the second set of layers.

[0061] In view of the above, UE 105b can determine that the first preemption indication can indicate a part of the resources of one of the first set of layers and the second set of layers associated with a TCI state associated with the first indication that is not intended for transmission to the UE thereon. UE 105b can also determine that the second preemption indication can indicate a part of the resources of the other of the first set of layers and the second set of layers that is not intended for transmission to the UE thereon.

[0062] In another embodiment of the present application, the downlink preemption configuration information may include only one indication, such as the positionInDCI field indicating the start position of the preemption indication in DCI 24. In this embodiment, TRP 103a or TRP 103b can transmit configuration information that associates the indication with one of the first TCI state and the second TCI state.

[0063] After receiving the downlink preemption configuration information, UE 105b can first obtain the preemption indication in DCI 24 based on the positionInDCI field. Based on the configuration information, UE 105b can determine that the preemption indication indicated by the positionInDCI field is associated with one of the first TCI state and the second TCI state. In some embodiments of the present disclosure, the preemption indication can be a continuous bit stream with 14 bits. UE 105b can determine the start position of the preemption indication in DCI 24 based on the positionInDCI field and then determine the consecutive 14 bits starting from the start position indicated by the positionInDCI field as the preemption indication.

[0064] As described above, the first TCI state may be associated with a first set of layers, and the second TCI state may be associated with a second set of layers. In view of this, UE 105b may determine that a preemption indication may indicate a portion of the resources of one of the first set of layers and the second set of layers associated with a TCI state associated with the indication that is not intended for transmission to the UE thereon.

[0065] According to some embodiments of the present application, the URLLC transmission may only preempt the resources of one of TRP 103a and TRP 103b. In such a case, only one preemption indication may be sufficient to indicate the preempted resources of one TRP.

[0066] In these embodiments, TRP 103a or TRP 103b may transmit downlink preemption configuration information to UE 105b. The downlink preemption configuration information may be a "DownlinkPreemption" information element (IE) as defined in TS38.331. The downlink preemption configuration information may include an indication indicating the start position of the preemption indication within DCI 24 (e.g., DCI format 2_1).

[0067] In this embodiment, the preemption indication may include an indicator indicating that the preemption indication is associated with one of the first TCI state or the second TCI state. According to some embodiments of the present application, the preemption indication may be a continuous bit stream having a size of 14 bits plus an indicator (e.g., one or more bits). In one embodiment of the present application, the indicator may be 1-bit information having a value of "0" or "1". For example, "0" may indicate that the preemption indication is associated with the first TCI state. "1" may indicate that the preemption indication is associated with the second TCI state. In another embodiment, "1" may indicate that the preemption indication is associated with the first TCI state. "0" may indicate that the preemption indication is associated with the second TCI state. In this embodiment, the preemption indication may have 15 bits, where 14 bits are used to indicate the resources of a set of layers that are not intended for transmission to the UE thereon, and 1 bit is used to indicate that the preemption indication is associated with one of the first TCI state or the second TCI state.

[0068] After receiving the downlink preemption configuration information, UE 105b may first obtain the preemption indication within DCI 24 based on the positionInDCI field. In some embodiments of the present disclosure, the preemption indication may be a continuous bit stream having a size of 14 bits plus an indicator (e.g., one or more bits). UE 105b may determine the start position of the preemption indication within DCI 24 based on the positionInDCI1 field and then determine the continuous 14 bits plus the size of the indicator (e.g., one or more bits) starting from the start position indicated by the positionInDCI1 field as the preemption indication.

[0069] Based on the indicator included in the preemption indication, UE 105b may determine that the preemption indication is associated with one of the first TCI state and the second TCI state indicated by the indicator.

[0070] As described above, the first TCI state may be associated with the first set of layers, and the second TCI state may be associated with the second set of layers. In view of this, UE 105b may determine that the preemption indication may indicate that a part of the resources of one of the first set of layers and the second set of layers associated with one of the TCI states indicated by the indicator is not intended for transmission to the UE thereon.

[0071] Figure 3 Illustrates a scenario of a preemption indication in multi-TRP transmission according to some other embodiments of the present application.

[0072] Reference Figure 3 , the wireless communication system may include two TRPs 103 (e.g., TRP 103a and TRP 103b) and three UEs 105 (e.g., a UE 105a, UE 105b, and UE 105c). UE 105b may be a UE with a relatively large transmission delay or latency tolerance, for example, an eMBB UE. Each of UE 105a and UE 105c may be a UE with a relatively small transmission delay or latency tolerance, for example, a URLLC UE.

[0073] Both TRP 103a and 103b may serve UE 105b. TRP 103a may also serve UE 105a. TRP 103b may further serve UE 105c.

[0074] As Figure 3As shown, TRP 103a can transmit DCI 21 for scheduling the first transmission 22 on the first PDSCH (i.e., the first PDSCH transmission) from TRP 103a to UE 105b. TRP 103b can transmit DCI 26 for scheduling the second transmission 23 on the second PDSCH (i.e., the second PDSCH transmission) from TRP 103b to UE 105b.

[0075] TRP 103a or TRP 103b can also transmit configuration information indicating the configuration of the first control - resource set (CORESET) group for TRP 103a and the second CORESET group for TRP 103b.

[0076] According to some embodiments of the present application, the configuration information may directly include the first CORESET group for TRP 103a and the second CORESET group for TRP 103b. The first CORESET group may include one or more CORESETs. The second CORESET group may include one or more CORESETs different from the CORESETs included in the first CORESET group.

[0077] According to some other embodiments of the present application, the configuration information may include one or more high - layer indices, and each of the one or more high - layer indices may be associated with a CORESET. After receiving the configuration information, the UE can determine that the CORESETs with the same high - layer index are in the CORESET group.

[0078] At the moment when the PDSCH transmissions 22 and 23 are going to UE 105b, the URLLC transmission 25 to UE 105a and / or the URLLC transmission 28 to UE 105c may reach TRP 103a and / or TRP 103b. Assuming that there are not enough resources for non - overlapping transmissions to UE 105b and URLLC transmissions to UE 105a and / or UE 105c, the URLLC transmissions will preempt a part of the resources of the first PDSCH from TRP 103a and / or a part of the resources of the second PDSCH from TRP 103b.

[0079] To indicate the preempted resources of TRP 103a and / or TRP 103b to UE 105b, TRP 103a or TRP 103b may transmit downlink preemption configuration information to UE 105b. The downlink preemption configuration information may be included in a plurality of higher layer parameters configured by base station 101 through a higher layer. For example, the higher layer may represent a layer higher than the PHY (Physical) layer, such as the RRC (Radio Resource Control) layer. The downlink preemption configuration information may be the "DownlinkPreemption" information element (IE) defined in TS 38.331. The downlink preemption configuration information may include one or more indications (e.g., positionInDCI field) of a serving cell, and the one or more indications indicate one or more start positions of one or more preemption indications in DCI 24 (e.g., DCI format 2_1). The downlink preemption configuration information may further include the following: an int-RNTI field defined in TS 38.331, which is used to indicate an interrupt radio network temporary identity (INT-RNTI) for monitoring the physical downlink control channel (PDCCH) to carry DCI 24; a set of int-ConfigurationPerServingCell fields, where each int-ConfigurationPerServingCell field indicates a serving cell index defined in TS 38.331; and a dci-PayloadSize field defined in TS 38.331, which is used to indicate the payload size for DCI 24.

[0080] In addition, to indicate the preempted resources of TRP 103a and / or TRP 103b to UE 105b, TRP 103b or TRP 103b may also need to transmit DCI 24 (e.g., DCI format 2_1) to UE 105b. DCI 24 may be transmitted in a common search space. In Figure 3 , it is assumed that only TRP 103a is configured with at least one common search space, then TRP 103a may transmit DCI 24 to UE 105b. The size of DCI 24 may be configured by a higher layer and up to 126 bits. DCI 24 may include one or more preemption indications. Each of the one or more preemption indications may indicate a part of the resources (e.g., time-frequency resources) of a PDSCH that is not intended for transmission to UE. In an embodiment of the present application, the time-frequency resources may be physical resource blocks (PRBs) and orthogonal frequency division multiplexing (OFDM) symbols.

[0081] In Figure 3Among them, DCI 24 and DCI 21 for scheduling the first PDSCH transmission 22 are transmitted in different CORESETs included in the first CORESET group. DCI 26 for scheduling the second PDSCH transmission 23 is transmitted in the CORESET in the second CORESET group.

[0082] According to some embodiments of the present application, the downlink preemption configuration information may include a first indication (e.g., the positionInDCI1 field) indicating the start position of the first preemption indication in DCI 24 and a second indication (e.g., the positionInDCI2 field) indicating the start position of the second preemption indication in DCI 24. The first preemption indication may be 14-bit information indicating a portion of the resources (e.g., PRBs and OFDM symbols) of the first PDSCH of TRP 103a that is not intended for transmission to the UE. The second preemption indication may be 14-bit information indicating a portion of the resources (i.e., PRBs and OFDM symbols) of the second PDSCH of TRP 103b that is not intended for transmission to the UE. A portion of the resources of the PDSCH may refer to a portion or all of the resources of the PDSCH.

[0083] After receiving the downlink preemption configuration information, UE 105b may first obtain the first preemption indication in DCI 24 based on positionInDCI1 and obtain the second preemption indication in DCI 24 based on positionInDCI2. In some embodiments of the present disclosure, the first preemption indication may be a continuous bit stream of 14 bits. UE 105b may determine the start position of the first preemption indication in DCI 24 based on the positionInDCI1 field and then determine the consecutive 14 bits starting from the start position indicated by the positionInDCI1 field as the first preemption indication. In some other embodiments of the present disclosure, the second preemption indication may be a continuous bit stream of 14 bits. UE 105b may determine the start position of the second preemption indication in DCI 24 based on the positionInDCI2 field, and then determine the consecutive 14 bits starting from the start position indicated by the positionInDCI2 field as the second preemption indication.

[0084] Since DCI 24, which includes a first preemption indication and a second preemption indication, and DCI 21 for scheduling the first PDSCH transmission are in the same CORESET group, UE 105b can determine that the first preemption indication is used to indicate a portion of the resources of the first PDSCH that is not intended for transmission to the UE. Since DCI 24, which includes the first preemption indication and the second preemption indication, and DCI 26 for scheduling the second PDSCH transmission are in different CORESET groups, UE 105b can determine that the second preemption indication is used to indicate a portion of the resources of the second PDSCH that is not intended for transmission to the UE. Therefore, the UE may not decode the data transmission on the first PDSCH on the resources indicated by the first preemption indication and may not decode the data transmission on the second PDSCH on the resources indicated by the second preemption indication.

[0085] In a case where the resources of the first PDSCH from TRP 103a are not preempted by the URLLC transmission, each bit of the first preemption indication can be set to 0 to indicate that the resources of the first PDSCH from TRP 103a are not preempted by the URLLC transmission. Similarly, in a case where the resources of the second PDSCH from TRP 103b are not preempted by the URLLC transmission, each bit of the second preemption indication can be set to 0 to indicate that the resources of the second PDSCH from TRP 103b are not preempted by the URLLC transmission.

[0086] For example, assume that DCI 21 schedules the first transmission 22 on PDSCH 1 and DCI 26 schedules the second transmission 23 on PDSCH 2. DCI 24, which includes the first preemption indication and the second preemption indication, and DCI 21 for scheduling the first transmission 22 on PDSCH 1 are transmitted in CORESET group 1. DCI 26 for scheduling the second transmission 23 on PDSCH 2 is transmitted in CORESET group 2.

[0087] In an example, the downlink preemption configuration information may include a positionInDCI1 field indicating the start position of a first preemption indication in DCI 24 and a positionInDCI2 field indicating the start position of a second preemption indication in DCI 24. The first preemption indication may indicate a portion of the resources of PDSCH 1 that is not intended for transmission to the UE. The second preemption indication may indicate a portion of the resources of PDSCH 2 that is not intended for transmission to the UE. In a case where the resources from TRP 103a on PDSCH 1 are not preempted by URLLC transmission, each bit of the first preemption indication may be set to 0 to indicate that the resources from TRP 103a on PDSCH 1 are not preempted by URLLC transmission. In a case where the resources from TRP 103b on PDSCH 2 are not preempted by URLLC transmission, each bit of the second preemption indication may be set to 0 to indicate that the resources from TRP 103b on PDSCH 2 are not preempted by URLLC transmission.

[0088] After receiving the downlink preemption configuration information, UE 105b may first obtain the first preemption indication in DCI 24 based on the positionInDCI1 field and the second preemption indication in DCI 24 based on the positionInDCI2 field. Since DCI 24 and DCI 21 are transmitted in the same CORESET group 1, UE 105b may determine that the first preemption indication is used to indicate a portion of the resources of PDSCH 1 that is not intended for transmission to the UE. Similarly, since DCI 24 and DCI 26 are transmitted in two different CORESET groups 1 and 2 respectively, UE 105b may determine that the second preemption indication is used to indicate a portion of the resources of PDSCH 2 that is not intended for transmission to the UE.

[0089] According to some embodiments of the present application, the URLLC transmission may only preempt the resources of one of TRP 103a and TRP 103b. In such a case, only one preemption indication may be sufficient to indicate the preempted resources of one TRP.

[0090] In this embodiment, TRP 103a or TRP 103b may transmit downlink preemption configuration information to UE105b. The downlink preemption configuration information may be the "DownlinkPreemption" information element (IE) defined in TS38.331. The downlink preemption configuration information may include an indication indicating the start position of the preemption indication within DCI 24 (e.g., DCI format 2_1). The indication may be the positionInDCI1 field or the positionInDCI2 field in the "DownlinkPreemption" information element (IE).

[0091] In a case where the positionInDCI1 field contains the downlink preemption configuration information and the positionInDCI2 field is empty, the preemption indication indicated by the positionInDCI1 field may indicate a part of the resources (e.g., PRBs and OFDM symbols) of the first PDSCH of TRP 103a that is not intended for transmission to the UE thereon.

[0092] In a case where the positionInDCI2 field contains the downlink preemption configuration information and the positionInDCI1 field is empty, the preemption indication indicated by the positionInDCI2 field may indicate a part of the resources (e.g., PRBs and OFDM symbols) of the second PDSCH of TRP 103b that is not intended for transmission to the UE thereon.

[0093] After receiving the downlink preemption configuration information, UE 105b may first obtain the preemption indication within DCI 24 based on the positionInDCI1 field or the positionInDCI2 field. In some embodiments of the present disclosure, the preemption indication may be a continuous bit stream having 14 bits. UE 105b may determine the start position of the preemption indication within DCI 24 based on the positionInDCI1 field or the positionInDCI2 field and then determine the consecutive 14 bits starting from the start position indicated by the positionInDCI1 field or the positionInDCI2 field as the preemption indication.

[0094] In a case where the preemption indication is obtained based on the positionInDCI1 field, UE 105b may associate the preemption indication with the first CORESET group in which DCI 24 and DCI 21 are transmitted, and thus UE 105b may determine that the preemption indication is used to indicate a part of the resources of the first PDSCH scheduled by DCI 21 that is not intended for transmission to the UE thereon.

[0095] Similarly, in a scenario where a preemption indication is obtained based on the positionInDCI2 field, the UE may associate the preemption indication with a second CORESET group different from the first CORESET group in which DCI 24 is transmitted. Thus, UE105b may determine that the preemption indication is used to indicate a part of the resources of the second PDSCH scheduled by DCI 26 in the second CORESET group that is not intended for transmission to the UE.

[0096] For example, assume that DCI 21 schedules a first transmission 22 on PDSCH 1 and DCI 26 schedules a second transmission 23 on PDSCH 2. Then, DCI 24 containing the first preemption indication and the second preemption indication and DCI 21 that schedules the first transmission 22 on PDSCH 1 are transmitted in CORESET group 1. DCI 26 that schedules the second transmission 23 on PDSCH 2 is transmitted in CORESET group 2.

[0097] In an example, in a scenario where only the resources on PDSCH 1 are preempted by the URLLC transmission 25, the downlink preemption configuration information may only include the positionInDCI1 field. In a scenario where only the resources on PDSCH 2 are preempted by the URLLC transmission 25, the downlink preemption configuration information may only include the positionInDCI2 field.

[0098] After receiving the downlink preemption configuration information, UE 105b may first obtain the preemption indication in DCI 24 based on the positionInDCI1 field or the positionInDCI2 field. In a scenario where the preemption indication is obtained based on the positionInDCI1 field, UE 105b may associate the preemption indication with CORESET group 1. Then, UE 105b may determine that the preemption indication is used to indicate a part of the resources of PDSCH 1 of TRP 103a that is not intended for transmission to the UE.

[0099] Similarly, in a scenario where the preemption indication is obtained based on the positionInDCI2 field, UE 105b may associate the preemption indication with CORESET group 2. Then, UE 105b may determine that the preemption indication is used to indicate a part of the resources of PDSCH 2 of TRP 103b that is not intended for transmission to the UE.

[0100] According to some embodiments of the present application, whether one or two indications indicating the position of the preemption indication in DCI 24 of a serving cell are included in the downlink preemption configuration information, either TRP 103a or TRP 103b can transmit the configuration information associating the indication with a CORESET group.

[0101] In an embodiment of the present application, the downlink preemption configuration information may include a first indication (e.g., the positionInDCI1 field) indicating the start position of the first preemption indication in DCI 24 (e.g., DCI format 2_1) and a second indication (e.g., the positionInDCI2 field) indicating the start position of the second preemption indication in DCI 24. In this case, either TRP 103a or TRP 103b can transmit the configuration information associating the first indication with one of the first CORESET group and the second CORESET group and associating the second indication with the other of the first CORESET group and the second CORESET group.

[0102] After receiving the downlink preemption configuration information, UE 105b may first obtain the first preemption indication in DCI 24 based on the positionInDCI1 field and obtain the second preemption indication in DCI 24 based on the positionInDCI2 field. In some embodiments of the present disclosure, the first preemption indication may be a continuous bit stream having 14 bits. UE 105b may determine the start position of the first preemption indication in DCI 24 based on the positionInDCI1 field and then determine the consecutive 14 bits starting from the start position indicated by the positionInDCI1 field as the first preemption indication. In some other embodiments of the present disclosure, the second preemption indication may be a continuous bit stream having 14 bits. UE 105b may determine the start position of the second preemption indication in DCI 24 based on the positionInDCI2 field, and then determine the consecutive 14 bits starting from the start position indicated by the positionInDCI2 field as the second preemption indication.

[0103] Based on the configuration information, UE 105b can determine that the first preemption indication indicated by the positionInDCI1 field is associated with one of the first CORESET group and the second CORESET group, and the second indication is associated with the other of the first CORESET group and the second CORESET group. Since DCI 21 for scheduling the first PDSCH is transmitted in the first CORESET group and DCI 26 for scheduling the second PDSCH is transmitted in the second CORESET group, this implies that the first PDSCH is associated with the first CORESET group and the second PDSCH is associated with the second CORESET group.

[0104] Therefore, UE 105b can determine that the first preemption indication can indicate a part of the resources of one of the first PDSCH and the second PDSCH that is associated with one CORESET group associated with the first indication and is not intended for transmission to the UE thereon. UE 105b can also determine that the second preemption indication can indicate a part of the resources of the other of the first PDSCH and the second PDSCH that is not intended for transmission to the UE thereon.

[0105] In another embodiment of the present application, the downlink preemption configuration information may include only one indication, for example, the positionInDCI field indicating the start position of the preemption indication in DCI 24. In this embodiment, TRP 103a or TRP 103b may transmit configuration information that associates the indication with one of the first CORESET group and the second CORESET group.

[0106] After receiving the downlink preemption configuration information, UE 105b can first obtain the preemption indication in DCI 24 based on the positionInDCI field. Based on the configuration information, UE 105b can determine that the preemption indication indicated by the positionInDCI field is associated with one of the first CORESET group and the second CORESET group.

[0107] As described above, the first PDSCH is associated with the first CORESET group, and the second PDSCH is associated with the second CORESET group. In view of this, UE 105b can determine that the preemption indication can indicate a part of the resources of one of the first PDSCH and the second PDSCH that is associated with one CORESET group associated with the indication and is not intended for transmission to the UE thereon.

[0108] According to some embodiments of the present application, the URLLC transmission may only preempt the resources of one of the TRP 103a and the TRP 103b. In these embodiments, only one preemption indication may be sufficient to indicate the preempted resources of one TRP.

[0109] In these embodiments, the TRP 103a or the TRP 103b may transmit downlink preemption configuration information to the UE 105b. The downlink preemption configuration information may be a "DownlinkPreemption" information element (IE) defined in TS38.331. The downlink preemption configuration information may include an indication indicating the start position of the preemption indication in DCI 24 (e.g., DCI format 2_1).

[0110] In these embodiments, the preemption indication may include an indicator indicating that the preemption indication is associated with one of the first TCICORESET group or the second CORESET group. According to some embodiments of the present application, the preemption indication may be a continuous bit stream having a size of 14 bits plus an indicator (e.g., one or more bits). In one embodiment of the present application, the indicator may be a 1-bit information having a value of "0" or "1". For example, "0" may indicate that the preemption indication is associated with the first CORESET group. "1" may indicate that the preemption indication is associated with the second CORESET group. In another embodiment, "1" may indicate that the preemption indication is associated with the first CORESET group. "0" may indicate that the preemption indication is associated with the second CORESET group. In this embodiment, the preemption indication may have 15 bits, where 14 bits are used to indicate the resources on which the transmission to the UE is not intended for the PDSCH and 1 bit is used to indicate that the preemption indication is associated with one of the first CORESET group or the second CORESET group.

[0111] After receiving the downlink preemption configuration information, the UE 105b may first obtain the preemption indication in DCI 24 based on the positionInDCI field. In some embodiments of the present disclosure, the preemption indication may be a continuous bit stream having a size of 14 bits plus an indicator (e.g., one or more bits). The UE 105b may determine the start position of the preemption indication in DCI 24 based on the positionInDCI1 field and then determine the continuous 14 bits plus the size of the indicator (e.g., one or more bits) starting from the start position indicated by the positionInDCI1 field as the preemption indication.

[0112] Based on the indicator included in the preemption indication, the UE 105b may determine that the preemption indication is associated with one of the first CORESET group and the second CORESET group indicated by the indicator.

[0113] As described above, the first CORESET group may be associated with the first PDSCH, and the second CORESET group may be associated with the second PDSCH. In view of this, UE 105b may determine that the preemption indication may indicate that a portion of the resources of one of the first PDSCH and the second PDSCH associated with one of the CORESET groups indicated by the indicator is not intended for transmission to the UE thereon.

[0114] Figure 4 Illustrates a scenario of preemption indication in multi-TRP transmission according to still some other embodiments of the present application.

[0115] Reference Figure 4 , the wireless communication system may include two TRPs 103 (e.g., TRP 103a and TRP 103b) and three UEs 105 (e.g., UE 105a, UE 105b, and UE 105c). UE 105b may be a UE with a relatively large transmission delay or latency tolerance, for example, an eMBB UE. Each of UE 105a and UE 105c may be a UE with a relatively small transmission delay or latency tolerance, for example, a URLLC UE.

[0116] Both TRP 103a and 103b may serve UE 105b. TRP 103a may also serve UE 105a. TRP 103b may further serve UE 105c.

[0117] As Figure 4 shown, TRP 103a may transmit DCI 21 for scheduling the first transmission 22 (i.e., the first PDSCH transmission) on the first PDSCH from TRP 103a to UE 105b. TRP 103b may transmit DCI 26 for scheduling the second transmission 23 on the second PDSCH from TRP 103b to UE 105b.

[0118] TRP 103a or TRP 103b may further transmit configuration information indicating a first control-resource set (CORESET) group for TRP 103a and a second CORESET group for TRP 103b.

[0119] According to some embodiments of the present application, the configuration information may directly include a first CORESET group for TRP 103a and a second CORESET group for TRP 103b. The first CORESET group may include one or more CORESETs. The second CORESET group may include one or more CORESETs different from those included in the first CORESET group.

[0120] According to some other embodiments of the present application, the configuration information may include one or more high-layer indexes, and each of the one or more high-layer indexes may be associated with a CORESET. After receiving the configuration information, the UE may determine that the CORESETs with the same high-layer index are in the CORESET group.

[0121] At the moment of performing PDSCH transmission 22 and PDSCH transmission 23 to UE 105b, the URLLC transmission 25 to UE 105a and the URLLC transmission 28 to UE 105c may reach TRP 103a and TRP 103b. Assuming that there are not enough resources for non-overlapping transmission to UE 105b and URLLC transmissions to UE 105a and UE 105c, the URLLC transmissions will preempt a part of the resources of the first PDSCH from TRP 103a and a part of the resources of the second PDSCH from TRP 103b.

[0122] To indicate the preempted resources of TRP 103a and TRP 103b to UE 105b, TRP 103a may transmit first downlink preemption configuration information to UE 105b and TRP 103b may transmit second downlink preemption configuration information to UE 105b. Each of the first and second downlink preemption configuration information may be included in a plurality of high-layer parameters configured by the base station 101 through a high layer. For example, the high layer may represent a layer higher than the PHY (Physical) layer, such as the RRC (Radio Resource Control) layer. Each of the first and second downlink preemption configuration information may be a "DownlinkPreemption" information element (IE) defined in TS38.331.

[0123] Different from Figure 2 and 3 in the scenario, in Figure 4Among them, both TRP 103a and TRP 103b are configured with a common search space. Therefore, TRP 103a can transmit DCI 24 (e.g., DCI format 2_1) containing one or more preemption indicators. TRP 103b can transmit DCI 27 containing one or more preemption indicators, for example, DCI format 2_1. The size of each of DCI 24 and DCI 27 can be configured by the higher layer and up to 126 bits. Each of the one or more preemption indicators can be 14-bit information indicating the resources (e.g., PRBs and OFDM symbols) of the PDSCH that are not intended to be part of the transmission to the UE on it.

[0124] In Figure 4 Among them, DCI 21 and DCI 24 are transmitted in different CORESETs included in the first CORESET group, and DCI 26 and DCI 27 are transmitted in different CORESETs in the second CORESET group.

[0125] According to some embodiments of the present application, the first downlink preemption configuration information may include a first indication (e.g., the positionInDCI field) indicating the start position of the first preemption indicator in DCI 24. The second downlink preemption configuration information may include a second indication (e.g., the positionInDCI field) indicating the start position of the second preemption indicator in DCI 27. The first preemption indicator can be 14-bit information indicating the resources (e.g., PRBs and OFDM symbols) of the first PDSCH of TRP 103a that are not intended to be part of the transmission to the UE on it. The second preemption indicator can be 14-bit information indicating the resources (PRBs and OFDM symbols) of the second PDSCH of TRP 103b that are not intended to be part of the transmission to the UE on it. A part of the resources of the PDSCH may refer to part or all of the resources of the PDSCH.

[0126] In addition, the first downlink preemption configuration information may further include: an int-RNTI field as defined in TS 38.331, used to indicate the interrupt radio network temporary identity (INT-RNTI) for monitoring the physical downlink control channel (PDCCH) to convey DCI 24; a set of int-ConfigurationPerServingCell fields, where each int-ConfigurationPerServingCell indicates the serving cell index as defined in TS 38.331; and a dci-PayloadSize field as defined in TS38.331, used to indicate the payload size for DCI 24.

[0127] The second downlink preemption configuration information may further include: an int-RNTI field as defined in TS 38.331, for indicating an interrupt radio network temporary identity (INT-RNTI) used to monitor the physical downlink control channel (PDCCH) for conveying DCI 27; a set of int-ConfigurationPerServingCell fields, where each int-ConfigurationPerServingCell field indicates a serving cell index as defined in TS 38.331; and a dci-PayloadSize field as defined in TS 38.331, for indicating the payload size for DCI 27.

[0128] After receiving the first and second downlink preemption configuration information, UE 105b may first obtain a first preemption indication in DCI 24 based on the first indication and a second preemption indication in DCI 27 based on the second indication. In some embodiments of the present disclosure, the first preemption indication may be a continuous bit stream having 14 bits. UE 105b may determine the start position of the first preemption indication in DCI 24 based on the first indication and then determine the consecutive 14 bits starting from the start position indicated by the first indication as the first preemption indication. In some other embodiments of the present disclosure, the second preemption indication may be a continuous bit stream having 14 bits. UE 105b may determine the start position of the second preemption indication in DCI 27 based on the second indication, and then determine the consecutive 14 bits starting from the start position indicated by the second indication as the second preemption indication.

[0129] Since DCI 24 containing the first preemption indication and DCI 21 for scheduling the first PDSCH transmission are in the same CORESET group (i.e., the first CORESET group), UE 105b may determine that the first preemption indication in DCI 24 is used to indicate a part of the resources of the first PDSCH on which transmissions to the UE are not intended to be made.

[0130] Similarly, since DCI 27 containing the second preemption indication and DCI 26 for scheduling the second PDSCH transmission are in the same CORESET group (i.e., the second CORESET group), UE 105b may determine that the second preemption indication in DCI 27 is used to indicate a part of the resources of the second PDSCH on which transmissions to the UE are not intended to be made.

[0131] Therefore, the UE may not decode the data transmission on the first PDSCH on the resources indicated by the first preemption indication and may not decode the data transmission on the second PDSCH on the resources indicated by the second preemption indication.

[0132] Figure 5 The figure illustrates a method for preemption indication in multi-TRP transmission according to some embodiments of the present application. The method is performed by TRP 103a or TRP 103b, as Figure 2 - 4 shown.

[0133] As Figure 5 shown, in step 502, TRP 103a or TRP 103b may transmit configuration information to the UE, for example, UE 105b as Figure 2 - 4 shown. The configuration information may be downlink preemption configuration information, and the downlink preemption configuration information may include a first indication indicating the start position of the first preemption indication in the first DCI.

[0134] In step 504, TRP 103a may transmit control information to the UE, for example, UE105b as Figure 2 - 4 shown. The control information may be a first DCI including a first preemption indication.

[0135] According to some embodiments of the present application, as Figure 2 shown, TRP 103a may also transmit a second DCI for scheduling PDSCH transmission and for indicating a first TCI state and a second TCI state. The first TCI state may be associated with a first set of CDM groups of a first set of DMRS ports including TRP103a, and the second TCI state is associated with a second set of CDM groups of a second set of DMRS ports including TRP 103b. The PDSCH transmission may include a first data transmission transmitted from the first set of DMRS ports on the first set of layers and a second transmission transmitted from the second set of DMRS ports on the second set of layers.

[0136] In an embodiment of the present application, the first DCI may further include a second preemption indication, and the downlink preemption configuration information may further include a second indication indicating the start position of the second preemption indication in the first DCI. The first preemption indication may indicate a part of the resources of the first set of layers that is not intended for transmission to the UE thereon. The second preemption indication may indicate a part of the resources of the second set of layers that is not intended for transmission to the UE thereon.

[0137] In another embodiment of the present application, the first DCI may only include one preemption indication, i.e., the first preemption indication. In this case, it can be determined whether the first preemption indication indicates a part of the resources of the first set of layers where transmissions to the UE are not intended to be performed or a part of the resources of the second set of layers where transmissions to the UE are not intended to be performed based on whether the first indication in the downlink preemption configuration information is the positionInDCI1 field or the positionInDCI2 field. As illustrated in Figure 2 In some embodiments of, in the case where the positionInDCI1 field is included in the downlink preemption configuration information, the first preemption indication may indicate a part of the resources of the first set of layers where transmissions to the UE are not intended to be performed. In the case where the positionInDCI2 field is included in the downlink preemption configuration information, the first preemption indication may indicate a part of the resources of the second set of layers where transmissions to the UE are not intended to be performed.

[0138] In yet another embodiment of the present application, the first DCI may only include one preemption indication, i.e., the first preemption indication. In this embodiment, the TRP 103a or the TRP 103b may transmit configuration information that associates the first indication with one of the first TCI state and the second TCI state. As Figure 2 In the embodiments described in, the first TCI state may be associated with the first set of layers, and the second TCI state may be associated with the second set of layers. Based on this, the first preemption indication indicates a part of the resources of one of the first set of layers and the second set of layers that is associated with one of the TCI states associated with the first indication where transmissions to the UE are not intended to be performed.

[0139] In yet another embodiment of the present application, the first DCI may further include a second preemption indication, and the downlink preemption configuration information may further include a second indication indicating the start position of the second preemption indication within the first DCI. In this embodiment, the TRP 103a or the TRP 103b may transmit configuration information that associates the first indication with one of the first TCI state and the second TCI state and associates the second indication with the other TCI state of the first TCI state and the second TCI state. The first preemption indication indicates a part of the resources of one of the first set of layers and the second set of layers that is associated with one of the TCI states associated with the first indication where transmissions to the UE are not intended to be performed. The second preemption indication indicates a part of the resources of one of the first set of layers and the second set of layers that is associated with the other TCI state where transmissions to the UE are not intended to be performed.

[0140] In yet another embodiment of the present application, the first preemption indication may include an indicator, for example, as Figure 2The 1-bit information illustrated in the embodiments in, the indicator indicates that the first preemption indication is associated with one of the first TCI state or the second TCI state. As Figure 2 As described in the embodiments in, the first TCI state may be associated with a first set of layers, and the second TCI state may be associated with a second set of layers. Based on this, the first preemption indication may indicate a part of the resources of one of the first set of layers and the second set of layers associated with one of the TCI states indicated by the indicator that is not intended for transmission to the UE thereon.

[0141] According to some embodiments of the present application, as Figure 3 shown in, the TRP 103a or the TRP 103b may also transmit configuration information indicating the first CORESET group for the TRP 103a and the second CORESET group for the TRP 103b. Each of the first CORESET group and the second CORESET group may include one or more CORESETs having the same high-layer index. A first DCI and a second DCI for scheduling the first PDSCH transmission from the TRP 103a are transmitted in the first CORESET group. A third DCI for scheduling the second PDSCH transmission from the TRP 103b is transmitted in the second CORESET group.

[0142] In an embodiment of the present application, the first DCI may further include a second preemption indication, and the downlink preemption configuration information may further include a second indication indicating the start position of the second preemption indication in the first DCI. The first preemption indication indicates a part of the resources of the first PDSCH that is not intended for transmission to the UE thereon. The second preemption indication indicates a part of the resources of the second PDSCH that is not intended for transmission to the UE thereon.

[0143] In another embodiment of the present application, the first DCI may only include one preemption indication, that is, the first preemption indication. In this case, it may be determined whether the first preemption indication indicates a part of the resources of the first PDSCH that is not intended for transmission to the UE thereon or indicates a part of the resources of the second PDSCH that is not intended for transmission to the UE thereon based on whether the first indication in the downlink preemption configuration information is the positionInDCI1 field or the positionInDCI2 field. As Figure 3As illustrated in some embodiments herein, in a case where the positionInDCI1 field is included in the downlink preemption configuration information, the first preemption indication may indicate a part of the resources of the first PDSCH that is not intended for transmission to the UE thereon. In a case where the positionInDCI2 field is included in the downlink preemption configuration information, the first preemption indication may indicate a part of the resources of the second PDSCH that is not intended for transmission to the UE thereon.

[0144] In another embodiment of the present application, the first DCI may only include one preemption indication, that is, the first preemption indication. In this case, the TRP 103a or the TRP 103b may transmit configuration information that associates the first indication with one of the first CORESET group and the second CORESET group. As Figure 3 described in the embodiments herein, the first CORESET group may be associated with the first PDSCH, and the second CORESET group may be associated with the second PDSCH. Based on this, the first preemption indication indicates a part of the resources of one of the first PDSCH and the second PDSCH that is associated with one CORESET group associated with the first indication and is not intended for transmission to the UE thereon.

[0145] In another embodiment of the present application, the first DCI may further include a second preemption indication, and the downlink preemption configuration information may further include a second indication indicating the start position of the second preemption indication in the first DCI. In this case, the TRP 103a or the TRP 103b may transmit configuration information that associates the first indication with one of the first CORESET group and the second CORESET group and associates the second indication with the other of the first CORESET group and the second CORESET group. The first preemption indication indicates a part of the resources of one of the first PDSCH and the second PDSCH that is associated with one CORESET group and is not intended for transmission to the UE thereon. The second preemption indication indicates a part of the resources of the other of the first PDSCH and the second PDSCH that is not intended for transmission to the UE thereon.

[0146] In another embodiment of the present application, the first preemption indication may include an indicator, for example, 1-bit information as illustrated in the embodiments in Figure 3 herein, and the indicator indicates that the first preemption indication is associated with one of the first CORESET group and the second CORESET group. As Figure 3As described in the embodiments in, the first CORESET group may be associated with the first PDSCH, and the second CORESET group may be associated with the second PDSCH. Based on this, the first preemption indication indicates a part of the resources of one of the first PDSCH and the second PDSCH associated with one CORESET group indicated by the indicator that is not intended for transmission to the UE thereon.

[0147] Figure 6 FIG. illustrates a method for preemption indication in multi-TRP transmission according to some other embodiments of the present application. The method is performed by the UE 105b, as Figure 2 - 4 shown in.

[0148] As Figure 6 shown in, in step 602, the UE 105b may receive configuration information from the TRP 103a or the TRP 103b, as Figure 2 - 4 shown in. The configuration information may be first downlink preemption configuration information, and the first downlink preemption configuration information may include a first indication indicating the start position of the first preemption indication in the first DCI.

[0149] In step 604, the UE 105b may receive control information from the TRP 103a or the TRP 103b, as Figure 2 - 4 shown in. The control information may be the first DCI including the first preemption indication.

[0150] According to some embodiments of the present application, as Figure 2 shown in, the UE 105b may further receive a second DCI for scheduling the PDSCH transmission and for indicating the first TCI state and the second TCI state. The first TCI state may be associated with a first set of CDM groups of a first set of DMRS ports including the TRP103a, and the second TCI state is associated with a second set of CDM groups of a second set of DMRS ports including the TRP 103b. The PDSCH transmission may include a first data transmission from the first set of DMRS ports on the first set of layers and a second transmission from the second set of DMRS ports on the second set of layers.

[0151] In an embodiment of the present application, the first DCI may further include a second preemption indication, and the first downlink preemption configuration information may further include a second indication indicating the start position of the second preemption indication in the first DCI. The first preemption indication may indicate a part of the resources of the first set of layers that is not intended for transmission to the UE thereon. The second preemption indication may indicate a part of the resources of the second set of layers that is not intended for transmission to the UE thereon.

[0152] In another embodiment of the present application, the first DCI may only include one preemption indication, i.e., the first preemption indication. In this case, it can be determined whether the first preemption indication indicates a part of the resources of the first set of layers where transmissions to the UE are not intended to be made or a part of the resources of the second set of layers where transmissions to the UE are not intended to be made based on whether the first indication in the first downlink preemption configuration information is the positionInDCI1 field or the positionInDCI2 field. As Figure 2 illustrated in some embodiments of

[0153] In yet another embodiment of the present application, the first DCI may only include one preemption indication, i.e., the first preemption indication. In this case, UE 105b may receive configuration information from TRP 103a or TRP 103b that associates the first indication with one of the first TCI state and the second TCI state. As Figure 2 described in the embodiments of

[0154] In yet another embodiment of the present application, the first DCI may further include a second preemption indication, and the first downlink preemption configuration information may further include a second indication indicating the start position of the second preemption indication within the first DCI. In this case, UE 105b may receive configuration information from TRP 103a or TRP 103b that associates the first indication with one of the first TCI state and the second TCI state and associates the second indication with the other of the first TCI state and the second TCI state. The first preemption indication indicates a part of the resources of one of the first set of layers and the second set of layers that is associated with one of the TCI states associated with the first indication where transmissions to the UE are not intended to be made. The second preemption indication indicates a part of the resources of the other of the first set of layers and the second set of layers that is associated with the other TCI state where transmissions to the UE are not intended to be made.

[0155] In another embodiment of the present application, the first preemption indication may include an indicator, for example, Figure 2 The 1-bit information illustrated in the embodiment of FIG. 1 indicates that the first preemption indication is associated with one of the first TCI state or the second TCI state. Figure 2 As described in the embodiment of FIG, a first TCI state may be associated with a first set of layers, and a second TCI state may be associated with a second set of layers. Based on this, the first preemption indication may indicate a portion of resources of one of the first set of layers and the second set of layers associated with a TCI state indicated by the indicator on which transmission to the UE is not intended.

[0156] According to some embodiments of the present application, Figure 3 As shown in FIG, UE 105b may receive configuration information from TRP 103a or TRP 103b indicating a first CORESET group for TRP 103a and a second CORESET group for TRP 103b. Each of the first and second CORESET groups may include one or more CORESETs having the same high-layer index. A first DCI and a second DCI for scheduling a first PDSCH transmission from TRP 103a are transmitted in the first CORESET group. A third DCI for scheduling a second PDSCH transmission from TRP 103b is transmitted in the second CORESET group.

[0157] In an embodiment of the present application, the first DCI may further include a second preemption indication, and the first downlink preemption configuration information may further include a second indication indicating a starting position of the second preemption indication within the first DCI. The first preemption indication indicates a portion of the resources of the first PDSCH on which transmission to the UE is not intended. The second preemption indication indicates a portion of the resources of the second PDSCH on which transmission to the UE is not intended.

[0158] In another embodiment of the present application, the first DCI may include only one preemption indication, namely, the first preemption indication. In this case, whether the first preemption indication indicates a portion of the resources of the first PDSCH on which transmission to the UE is not intended or indicates a portion of the resources of the second PDSCH on which transmission to the UE is not intended may be determined based on whether the first indication in the first downlink preemption configuration information is the positionInDCI1 field or the positionInDCI2 field. Figure 3As illustrated in some embodiments, in the case where the positionInDCI1 field is included in the first downlink preemption configuration information, the first preemption indication may indicate a part of the resources of the first PDSCH that is not intended for transmission to the UE. In the case where the positionInDCI2 field is included in the first downlink preemption configuration information, the first preemption indication may indicate a part of the resources of the second PDSCH that is not intended for transmission to the UE.

[0159] In another embodiment of the present application, the first DCI may only include one preemption indication, i.e., the first preemption indication. In this case, UE 105b may receive configuration information from TRP 103a or TRP 103b that associates the first indication with one of the first CORESET group and the second CORESET group. As Figure 3 described in the embodiments, the first CORESET group may be associated with the first PDSCH, and the second CORESET group may be associated with the second PDSCH. Based on this, the first preemption indication indicates a part of the resources of one of the first PDSCH and the second PDSCH that is associated with one CORESET group associated with the first indication and that is not intended for transmission to the UE.

[0160] In another embodiment of the present application, the first DCI may further include a second preemption indication, and the first downlink preemption configuration information may further include a second indication indicating the start position of the second preemption indication within the first DCI. In this case, UE 105b may receive configuration information from TRP 103a or TRP 103b that associates the first indication with one of the first CORESET group and the second CORESET group and associates the second indication with the other of the first CORESET group and the second CORESET group. The first preemption indication indicates a part of the resources of one of the first PDSCH and the second PDSCH that is associated with one CORESET group and that is not intended for transmission to the UE. The second preemption indication indicates a part of the resources of the other of the first PDSCH and the second PDSCH that is not intended for transmission to the UE.

[0161] In another embodiment of the present application, the first preemption indication may include an indicator, for example, as Figure 3The 1-bit information illustrated in the embodiments in [description], the indicator indicates that the first preemption indication is associated with one of the first CORESET group and the second CORESET group. Based on this, the first preemption indication indicates a part of the resources of one of the first PDSCH and the second PDSCH associated with the CORESET group indicated by the indicator that is not intended for transmission to the UE on it.

[0162] According to some embodiments of the present application, as Figure 4 shown in [description], the UE 105b may receive second downlink preemption configuration information from the TRP 103b. The second downlink preemption configuration information may include a second indication indicating the start position of the second preemption indication in the fourth DCI. The UE 105b may receive the fourth DCI including the second preemption indication, as Figure 4 shown in [description].

[0163] In addition, the UE 105b may also receive configuration information indicating the first CORESET group for the TRP 103a and the second CORESET group for the TRP 103b from the TRP 103a or the TRP 103b. Each of the first CORESET group and the second CORESET group may include multiple CORESETs having the same high-layer index.

[0164] The UE 105b may receive the first DCI and the third DCI in the first CORESET group and receive the second DCI and the fourth DCI in the second CORESET group. Then the UE may determine that: the first preemption indication included in the first DCI indicates a part of the resources of the first PDSCH scheduled by the first DCI that is not intended for transmission to the UE on it; and the second preemption indication included in the second DCI indicates a part of the resources of the second PDSCH scheduled by the fourth DCI that is not intended for transmission to the UE on it.

[0165] Figure 7 A simplified block diagram of a device for preemption indication in multi-TRP transmission according to some embodiments of the present application is illustrated. The device 700 may be the TRP 103a or the TRP 103b, as Figure 2 - 4 shown in [description].

[0166] Refer to Figure 7, device 700 may include at least one non-transitory computer-readable medium 72, at least one receiver 74, at least one transmitter 76, and at least one processor 78. In some embodiments of the present application, at least one receiver 74 and at least one transmitter 76 may be integrated into at least one transceiver. At least one non-transitory computer-readable medium 72 may have computer-executable instructions stored therein. At least one processor 78 may be coupled to at least one non-transitory computer-readable medium 72, at least one receiver 74, and at least one transmitter 76. The computer-executable instructions may be programmed to implement a method using at least one receiver 74, at least one transmitter 76, and at least one processor 78. The method may be a method according to an embodiment of the present application. For example, Figure 5 the method shown in

[0167] Figure 8 FIG. illustrates a simplified block diagram of a device for preemption indication in multi-TRP transmission according to some other embodiments of the present application. Device 800 may be a UE 105b, as shown in Figure 2 - 4

[0168] Referring to Figure 8 , device 800 may include at least one non-transitory computer-readable medium 82, at least one receiver 84, at least one transmitter 86, and at least one processor 88. In some embodiments of the present application, at least one receiver 84 and at least one transmitter 86 may be integrated into at least one transceiver. At least one non-transitory computer-readable medium 82 may have computer-executable instructions stored therein. At least one processor 88 may be coupled to at least one non-transitory computer-readable medium 82, at least one receiver 84, and at least one transmitter 86. The computer-executable instructions may be programmed to implement a method using at least one receiver 84, at least one transmitter 86, and at least one processor 88. The method may be a method according to an embodiment of the present application. For example, Figure 6 the method shown in

[0169] ​According to an embodiment of the present application, the method may also be implemented on a programmed processor. However, the controller, flowchart, and module may also be implemented on a general-purpose or special-purpose computer, a programmed microprocessor or controller, and peripheral integrated circuit elements, integrated circuits, such as discrete element circuits, etc., hardware electronic or logic circuits, programmable logic devices, and so on. Generally, any device on which a finite state machine capable of implementing the flowcharts shown in the figures resides can be used to implement the processor functions of the present application. For example, an embodiment of the present application provides a device for emotion recognition from speech, the device including a processor and a memory. Computer programmable instructions for implementing the method of emotion recognition from speech are stored in the memory, and the processor is configured to execute the computer programmable instructions to implement the method of emotion recognition from speech. The method may be the method as described above or another method according to an embodiment of the present application.

[0170] Alternative embodiments preferably implement the method according to an embodiment of the present application in a non-transitory computer-readable storage medium storing computer programmable instructions. The instructions are preferably executed by a computer-executable component preferably integrated with a network security system. The non-transitory computer-readable storage medium may be stored on any suitable computer-readable medium, such as RAM, ROM, flash memory, EEPROM, optical storage devices (CD or DVD), hard disk drives, floppy disk drives, or any suitable device. The computer-executable component is preferably a processor, but alternatively or additionally, the instructions may be executed by any suitable dedicated hardware device. For example, an embodiment of the present application provides a non-transitory computer-readable storage medium in which computer programmable instructions are stored. The computer programmable instructions are configured to implement the method for emotion recognition from speech as described above or other methods according to an embodiment of the present application.

[0171] Although the present application has been described with specific embodiments of the present application, it is obvious that many alternatives, modifications, and variations will be apparent to those skilled in the art. For example, the various components of the embodiments may be interchanged, added, or replaced in other embodiments. Moreover, all elements of each figure are not necessary for the operation of the disclosed embodiments. For example, those skilled in the art of the disclosed embodiments will be able to implement and use the teachings of the present application simply by adopting the elements of the independent claims. Therefore, the embodiments of the applications described herein are intended to be illustrative rather than restrictive. Various changes may be made without departing from the spirit and scope of the present application.

Claims

1. A base station, comprising: at least one memory; and at least one processor, coupled to the at least one memory and configured to cause the base station to: transmit downlink preemption configuration information to a user equipment UE, wherein the downlink preemption configuration information includes a first indication indicating a start position of a first preemption indication within a first downlink control information DCI; transmit the first DCI including the first preemption indication to the UE; and transmit a second DCI for scheduling a physical downlink shared channel PDSCH transmission and for indicating a first transmission configuration indicator TCI state and a second TCI state; wherein the first preemption indication within the first DCI includes an indicator indicating that the first preemption indication is associated with one of the first TCI state or the second TCI state.

2. The base station according to claim 1, wherein: the first TCI state is associated with a first code division multiplexing CDM group including a first set of demodulation reference signal DMRS ports, and the second TCI state is associated with a second CDM group including a second set of DMRS ports; and the PDSCH transmission includes a first data transmission on a first set of layers transmitted from the first set of DMRS ports and a second transmission on a second set of layers transmitted from the second set of DMRS ports.

3. The base station according to claim 2, wherein the first DCI further includes a second preemption indication, and the downlink preemption configuration information further includes a second indication indicating a start position of the second preemption indication within the first DCI.

4. The base station according to claim 3, wherein the first preemption indication indicates a part of the resources of the first set of layers that is not intended for transmission to the UE thereon.

5. The base station according to claim 3, wherein the second preemption indication indicates a part of the resources of the second set of layers that is not intended for transmission to the UE thereon.

6. The base station according to claim 2, wherein the first preemption indication indicates a part of the resources of the first set of layers that is not intended for transmission to the UE thereon.

7. The base station according to claim 2, wherein the first preemption indication indicates a part of the resources of the second set of layers that is not intended for transmission to the UE thereon.

8. The base station according to claim 2, wherein the at least one processor is configured to cause the base station to transmit configuration information associating the first indication with one of the first TCI state and the second TCI state, wherein the first preemption indication indicates a part of the resources of one of the first set of layers and the second set of layers associated with the one TCI state that is not intended for transmission to the UE thereon.

9. The base station according to claim 3, wherein the at least one processor is configured to cause the base station to transmit configuration information that associates the first indication with one of the first TCI state and the second TCI state and associates the second indication with the other TCI state of the first TCI state and the second TCI state; wherein the first preemption indication indicates a part of the resources of one of the first set of layers and the second set of layers associated with the one TCI state that is not intended for transmission to the UE thereon; and wherein the second preemption indication indicates a part of the resources of the other of the first set of layers and the second set of layers that is not intended for transmission to the UE thereon.

10. The base station according to claim 2, wherein the indicator in the first preemption indication further indicates a part of the resources of one of the first set of layers and the second set of layers associated with the one TCI state that is not intended for transmission to the UE thereon.

11. The base station according to claim 1, wherein the at least one processor is configured to cause the base station to transmit configuration information indicating a first control-resource set CORESET group and a second CORESET group; wherein the first DCI and a second DCI for scheduling the first PDSCH transmission are transmitted in the first CORESET group; and wherein a third DCI for scheduling the second PDSCH transmission is transmitted in the second CORESET group.

12. The base station according to claim 11, wherein the first DCI further includes a second preemption indication, and the downlink preemption configuration information further includes a second indication indicating the start position of the second preemption indication in the first DCI.

13. The base station according to claim 12, wherein the first preemption indication indicates a part of the resources of the first PDSCH that is not intended for transmission to the UE thereon.

14. The base station according to claim 12, wherein the second preemption indication indicates a part of the resources of the second PDSCH that is not intended for transmission to the UE thereon.

15. The base station according to claim 11, wherein the first preemption indication indicates a part of the resources of the first PDSCH that is not intended for transmission to the UE thereon.

16. The base station according to claim 11, wherein the first preemption indication indicates a part of the resources of the second PDSCH that is not intended for transmission to the UE thereon.

17. The base station according to claim 11, wherein the at least one processor is configured to cause the base station to transmit configuration information associating the first indication with one of the first CORESET group and the second CORESET group, wherein the first preemption indication indicates a portion of the resources of one of the first PDSCH and the second PDSCH associated with the one CORESET group that is not intended for transmission to the UE thereon.

18. The base station according to claim 12, wherein the at least one processor is configured to cause the base station to transmit configuration information associating the first indication with one of the first CORESET group and the second CORESET group and associating the second indication with the other of the first CORESET group and the second CORESET group; wherein the first preemption indication indicates a portion of the resources of one of the first PDSCH and the second PDSCH associated with the one CORESET group that is not intended for transmission to the UE thereon; and wherein the second preemption indication indicates a portion of the resources of the other of the first PDSCH and the second PDSCH that is not intended for transmission to the UE thereon.

19. The base station according to claim 11, wherein the first preemption indication includes an indicator that indicates that the first preemption indication is associated with one of the first CORESET group and the second CORESET group and indicates a portion of the resources of one of the first PDSCH and the second PDSCH associated with the one CORESET group that is not intended for transmission to the UE thereon.

20. A user equipment (UE) comprising: at least one memory; and at least one processor coupled to the at least one memory and configured to cause the UE to: receive, at the user equipment (UE), first downlink preemption configuration information, wherein the first downlink preemption configuration information includes a first indication indicating a start position of a first preemption indication in first downlink control information (DCI); receive, at the UE, the first DCI including the first preemption indication; and receive a second DCI for scheduling a physical downlink shared channel (PDSCH) transmission and for indicating a first transmission configuration indicator (TCI) state and a second TCI state; wherein the first preemption indication in the first DCI includes an indicator that indicates that the first preemption indication is associated with one of the first TCI state or the second TCI state.

21. The UE according to claim 20, wherein: The first TCI state is associated with a first code division multiplexing (CDM) group including a first set of demodulation reference signal (DMRS) ports, and the second TCI state is associated with a second CDM group including a second set of DMRS ports; and The PDSCH transmission includes a first data transmission transmitted from the first set of DMRS ports on a first set of layers and a second transmission transmitted from the second set of DMRS ports on a second set of layers.

22. The UE according to claim 21, wherein the first DCI further includes a second preemption indication, and the first downlink preemption configuration information further includes a second indication indicating a start position of the second preemption indication within the first DCI.

23. The UE according to claim 22, wherein the first preemption indication indicates a portion of the resources of the first set of layers that is not intended for transmission to the UE thereon.

24. The UE according to claim 22, wherein the second preemption indication indicates a portion of the resources of the second set of layers that is not intended for transmission to the UE thereon.

25. The UE according to claim 21, wherein the first preemption indication indicates a portion of the resources of the first set of layers that is not intended for transmission to the UE thereon.

26. The UE according to claim 21, wherein the first preemption indication indicates a portion of the resources of the second set of layers that is not intended for transmission to the UE thereon.

27. The UE according to claim 21, wherein the at least one processor is configured to cause the UE to receive configuration information associating the first indication with one of the first TCI state and the second TCI state, wherein the first preemption indication indicates a portion of the resources of one of the first set of layers and the second set of layers associated with the one TCI state that is not intended for transmission to the UE thereon.

28. The UE according to claim 22, wherein the at least one processor is configured to cause the UE to receive configuration information associating the first indication with one of the first TCI state and the second TCI state and associating the second indication with the other of the first TCI state and the second TCI state; wherein the first preemption indication indicates a portion of the resources of one of the first set of layers and the second set of layers associated with the one TCI state that is not intended for transmission to the UE thereon; and wherein the second preemption indication indicates a portion of the resources of the other of the first set of layers and the second set of layers that is not intended for transmission to the UE thereon.

29. The UE according to claim 21, wherein the indicator within the first preemption indication further indicates a portion of the resources of one of the first set of layers and the second set of layers associated with the one TCI state that is not intended for transmission to the UE thereon.

30. The UE according to claim 20, wherein the at least one processor is configured to cause the UE to receive configuration information indicating a first control - resource set (CORESET) group and a second CORESET group; wherein the first DCI and a second DCI for scheduling a first physical downlink shared channel (PDSCH) transmission are transmitted in the first CORESET group; and wherein a third DCI for scheduling a second PDSCH transmission is transmitted in the second CORESET group.

31. The UE according to claim 30, wherein the first DCI further includes a second pre - emption indication, and the first downlink pre - emption configuration information further includes a second indication indicating a start position of the second pre - emption indication within the first DCI.

32. The UE according to claim 31, wherein the first pre - emption indication indicates a part of the resources of the first PDSCH that is not intended for transmission to the UE thereon.

33. The UE according to claim 31, wherein the second pre - emption indication indicates a part of the resources of the second PDSCH that is not intended for transmission to the UE thereon.

34. The UE according to claim 30, wherein the first pre - emption indication indicates a part of the resources of the first PDSCH that is not intended for transmission to the UE thereon.

35. The UE according to claim 30, wherein the first pre - emption indication indicates a part of the resources of the second PDSCH that is not intended for transmission to the UE thereon.

36. The UE according to claim 30, wherein the at least one processor is configured to cause the UE to receive configuration information associating the first indication with one of the first CORESET group and the second CORESET group, wherein the first pre - emption indication indicates a part of the resources of one of the first PDSCH and the second PDSCH associated with the one CORESET group that is not intended for transmission to the UE thereon.

37. The UE according to claim 31, wherein the at least one processor is configured to cause the UE to receive configuration information associating the first indication with one of the first CORESET group and the second CORESET group and associating the second indication with the other of the first CORESET group and the second CORESET group; wherein the first pre - emption indication indicates a part of the resources of one of the first PDSCH and the second PDSCH associated with the one CORESET group that is not intended for transmission to the UE thereon; and wherein the second pre - emption indication indicates a part of the resources of the other of the first PDSCH and the second PDSCH that is not intended for transmission to the UE thereon.

38. The UE according to claim 30, wherein the first preemption indication includes an indicator that indicates that the first preemption indication is associated with one of the first CORESET group and the second CORESET group and indicates a part of the resources of one of the first PDSCH and the second PDSCH associated with the one CORESET group that is not intended for transmission to the UE thereon. CORESET group and indicates a part of the resources of one of the first PDSCH and the second PDSCH associated with the one CORESET group that is not intended for transmission to the UE thereon.

39. The UE according to claim 30, wherein the at least one processor is configured to cause the UE to: receive second downlink preemption configuration information at the UE, wherein the second downlink preemption configuration information includes a second indication indicating a start position of a second preemption indication in second downlink control information DCI; and receive the second DCI including the second preemption indication at the UE.

40. The UE according to claim 39, wherein the at least one processor is configured to cause the UE to receive configuration information indicating a first control-resource set CORESET group and a second CORESET group; wherein the first DCI and a third DCI for scheduling a first PDSCH transmission are transmitted in the first CORESET group; and wherein the second DCI and a fourth DCI for scheduling a second PDSCH transmission are transmitted in the second CORESET group.

41. The UE according to claim 40, wherein the first preemption indication indicates a part of the resources of the first PDSCH that is not intended for transmission to the UE thereon, and the second preemption indication indicates a part of the resources of the second PDSCH that is not intended for transmission to the UE thereon.

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