Dynamic switching instruction method

Abstract

This document relates to a method of dynamic switching indication in wireless communication, the method including: transmitting, by a network device, to a wireless communication device, first parameters indicated by a first signaling message; transmitting, by the network device, to the wireless communication device, a plurality of transmission configuration states by a second signaling message; and determining, by the wireless communication device, a plurality of transmission configuration states for a transmission, the plurality of transmission configuration states including a Transmission Configuration Indicator (TCI) state.

Description

[Technical Field]

[0001] Technical Field This document relates generally to wireless communications. [Background technology]

[0002] background Wireless communication technologies are moving the world toward an increasingly connected and networked society. The rapid growth of wireless communication and technological advances are resulting in greater demands for capacity and connectivity. Other aspects, such as energy consumption, device cost, spectral efficiency, and latency, are also important to meet the needs of various communication scenarios. Compared with existing wireless networks, next-generation systems and wireless communication technologies need to provide support for an increased number of users and devices, as well as support an increasingly mobile society. Summary of the Invention [Means for solving the problem]

[0003] overview With respect to reporting or using channel state information, various techniques are disclosed that can be implemented by embodiments of mobile communication technologies, including fifth generation (5G), new radio (NR), fourth generation (4G), and long-term evolution (LTE) communication systems.

[0004] In one exemplary aspect, a wireless communication method is disclosed that includes receiving, by a wireless communication device, from a network device, first parameters indicated by a first signaling message, receiving, by the wireless communication device, a plurality of transmission configuration states from the network device by a second signaling message, and determining, by the wireless communication device, a plurality of transmission configuration states for a transmission, the plurality of transmission configuration states including a transmission configuration indicator (TCI) state.

[0005] In another exemplary aspect, another wireless communication method is disclosed that includes: transmitting, by a network device, first parameters indicated by a first signaling message to a wireless communication device; transmitting, by the network device, a plurality of transmission configuration states to the wireless communication device by a second signaling message; and determining, by the wireless communication device, a plurality of transmission configuration states for a transmission, the plurality of transmission configuration states including a transmission configuration indicator (TCI) state.

[0006] In yet another exemplary aspect, the above-described methods are embodied in the form of a computer-readable medium storing processor-executable code for implementing the methods.

[0007] In yet another exemplary aspect, a device configured or operable to perform the above-described method is disclosed, the device comprising a processor configured to implement the method.

[0008] These and other aspects and their implementations are described in more detail in the drawings, specification, and claims. The present invention provides, for example, the following. (Item 1) 1. A method of wireless communication, comprising: receiving, by the wireless communication device, from the network device, a first parameter indicated by a first signaling message; receiving, by the wireless communication device, from the network device, a plurality of transmission configuration states in a second signaling message; determining, by the wireless communication device, the plurality of transmission configuration states for transmission; Including, The method, wherein the plurality of transmission configuration states includes a transmission configuration indicator (TCI) state. (Item 2) Item 10. The method of claim 1, wherein the first signaling message includes radio resource control (RRC) signaling. (Item 3) Item 10. The method of item 1, wherein the first signaling message includes Medium Access Control-Control Element (MAC-CE) signaling. (Item 4) Item 10. The method of item 1, wherein the first parameter indicates a switching mode. (Item 5) Item 10. The method of item 1, wherein the first parameter is further determined according to the value of an iteration parameter. (Item 6) Item 1. The method of item 1, wherein the second signaling message includes MAC-CE signaling. (Item 7) Item 10. The method of item 1, wherein the plurality of transmission configuration states are determined according to a first index value in the second signaling message. (Item 8) Item 10. The method of claim 1, wherein the plurality of transmission configuration states are determined by a TCI state set indicated by downlink control information (DCI). (Item 9) The method of item 8, wherein the plurality of transmission configuration states are further determined by one or more of the following: the TCI state in the TCI state set in order, the TCI state in the TCI state set associated with the lowest group information index value, and the TCI state in the TCI state set associated with the same group information index value as the group information index of the DCI. (Item 10) Item 2. The method of item 1, wherein the multiple transmission configuration states are determined by a codepoint that includes only TCI states associated with the same group information index value, and the codepoint is activated by a MAC-CE with the lowest index. (Item 11) Item 10. The method of item 1, wherein the second signaling message includes DCI signaling. (Item 12) The DCI signaling comprises: TCI state selection information, and TCI status transmission order information Item 12. The method of item 11, further comprising one or more of: (Item 13) Item 12. The method of item 11, further comprising: for a TCI field not presented in the DCI, the plurality of transmission configuration states are determined by the TCI field in a latest DCI having the TCI field before the DCI. (Item 14) 1. A method of wireless communication, comprising: transmitting, by the network device, to the wireless communication device, first parameters indicated by a first signaling message; transmitting, by the network device, a plurality of transmission configuration states in a second signaling message to the wireless communication device; determining, by the wireless communication device, the plurality of transmission configuration states for transmission; Including, The method, wherein the plurality of transmission configuration states includes a transmission configuration indicator (TCI) state. (Item 15) Item 15. The method of item 14, wherein the first signaling message includes radio resource control (RRC) signaling. (Item 16) Item 15. The method of item 14, wherein the first signaling message includes Medium Access Control-Control Element (MAC-CE) signaling. (Item 17) Item 15. The method according to item 14, wherein the first parameter indicates a switching mode. (Item 18) Item 15. The method of item 14, wherein the first parameter is further determined according to a value of an RRC parameter. (Item 19) Item 15. The method of item 14, wherein the second signaling message includes MAC-CE signaling. (Item 20) Item 15. The method of item 14, wherein the plurality of transmission configuration states are determined according to a first index value in the second signaling message. (Item 21) Item 15. The method of item 14, wherein the plurality of transmission configuration states are determined by a TCI state set indicated by a DCI. (Item 22) 22. The method of claim 21, wherein the plurality of transmission configuration states are further determined by one or more of the following: the TCI state in the TCI state set in order, the TCI state in the TCI state set associated with the lowest group information index value, and the TCI state in the TCI state set associated with the same group information index value as the group information index of the DCI. (Item 23) Item 15. The method of item 14, wherein the plurality of transmission configuration states are determined by a code point that includes only TCI states associated with the same group information index value, and the code point is activated by a MAC-CE with the lowest index. (Item 24) Item 15. The method of item 14, wherein the second signaling message includes DCI signaling. (Item 25) The DCI signaling comprises: TCI state selection information, and TCI status transmission order information 25. The method of claim 24, further comprising one or more of: (Item 26) 25. The method of claim 24, further comprising: for a TCI field not presented in the DCI, the plurality of transmission configuration states are determined by the TCI field in a latest DCI that has the TCI field before the DCI. (Item 27) 27. An apparatus for wireless communication comprising a processor configured to perform the method according to any one of items 1 to 26. (Item 28) 27. A computer readable medium having code stored thereon, the code, when executed by a processor, causing the processor to perform the method of any of items 1 to 26. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 shows an example of a wireless communication system including a base station (BS) and user equipment (UE).

[0010] [Figure 2] FIG. 2 is an example block diagram of a wireless communication system.

[0011] [Figure 3] FIG. 3 illustrates an example of a transmission process between a wireless communication device and a network device.

[0012] [Figure 4] FIG. 4 shows an example of dynamic switching indication-based and time interval-based TCI state determination.

[0013] [Figure 5] FIG. 5 shows an example of TCI selection based on time interval.

[0014] [Figure 6] FIG. 6 is a flowchart illustrating an exemplary method.

[0015] [Figure 7] FIG. 7 is a flowchart illustrating an exemplary method. DETAILED DESCRIPTION OF THE INVENTION

[0016] Detailed Description Section headings are used in this document solely to improve readability and are not intended to limit the scope of the disclosed embodiments and technologies in each section to that section alone. The example of a fifth-generation (5G) wireless protocol is used to illustrate certain features. However, the applicability of the disclosed technologies is not limited to 5G wireless systems alone.

[0017] 1 illustrates an example of a wireless communication system (e.g., a Long Term Evolution (LTE), 5G, or NR cellular network) including a BS 120 and one or more user equipments (UEs) 111, 112, and 113. In some embodiments, uplink transmissions (131, 132, 133) may include uplink control information (UCI), higher layer signaling (e.g., UE assistance information or UE capabilities), or uplink information. In some embodiments, downlink transmissions (141, 142, 143) may include DCI or higher layer signaling or downlink information. The UEs may be, for example, smartphones, tablets, mobile computers, machine-to-machine (M2M) devices, terminals, mobile devices, Internet of Things (IoT) devices, etc.

[0018] To improve coverage at cell edges and reduce the adverse effects of blocking, multi-TRP (Transmission and Reception Point) (MTRP) technology has become an important technical method in 5G New Radio (NR) systems. With the gradual standardization of MTRP technology and the evolution of R16 / 17, MTRP technology is steadily improving. In a URLLC scenario, one downlink control information (DCI) can schedule multiple PDSCHs from different TRPs or schedule multiple PUSCHs to face different TRPs. However, in this scenario, if the gNodeB wants to schedule independent PDSCHs, whether the PDSCHs are from the TRP where the DCI is transmitted or from another TRP whose instructions are unknown to the UE, the UE cannot use the correct beam for reception.

[0019] This document proposes a method to solve the problem of mode configuration and TCI status indication for UEs when a gNB performs dynamic switching in an MTRP scenario.

[0020] The multi-TRP (Multiple Transmission and Reception Point) technique uses multiple TRPs to effectively improve transmission throughput in Long Term Evolution (LTE), Long Term Evolution-Advanced (LTE-A), and New Radio Access (NR) in enhanced mobile broadband (eMBB) scenarios. At the same time, the use of multi-TRP transmission or reception can effectively reduce the probability of information jamming and improve transmission reliability in Ultra-reliability and Low Latency Communication (URLLC) scenarios.

[0021] According to the mapping relationship between the transmitted signal flow and multiple TRPs / panels, coordinated multipoint transmission / reception can be divided into two types: coherent transmission and non-coherent transmission. In coherent transmission, each data layer is mapped to multiple TRPs / panels via a weighted vector. However, in a practical deployment environment, this mode has higher requirements for synchronization between TRPs and the transmission capacity of the backhaul link, and is sensitive to many non-ideal factors.

[0022] In comparison, non-coherent joint transmission (NCJT) is less affected by the above factors. NCJT was the main consideration in R15 cooperative multipoint transmission / reception. NCJT means that each data flow is mapped only to ports corresponding to TRPs / panels with the same channel large-scale parameter (QCL). Different data flows can be mapped to different ports with different large-scale parameters, and all TRPs do not need to be treated as virtual arrays.

[0023] If the gNodeB wants to schedule independent PDSCH / PUSCH, the current indication is not sufficient for the UE. Therefore, research is needed on enhancements for dynamic switching.

[0024] The embodiments and techniques described in this document can be used to solve the problems mentioned above.

[0025] It should be noted that in this document, the definition of "beam" is equivalent to a quasi-collocation (QCL) state, a transmission configuration indicator (TCI) state, a spatial relationship state (also called a spatial relationship information state), a reference signal (RS), a spatial filter, or precoding.

[0026] The definition of "Tx beam" is equivalent to QCL state, TCI state, spatial relationship state, DL / UL reference signals (e.g., Channel State Information Reference Signal (CSI-RS), Synchronization Signal Block (SSB) (also known as SS / PBCH), Demodulation Reference Signal (DMRS), Sounding Reference Signal (SRS), and Physical Random Access Channel (PRACH)), and Tx spatial filter or Tx precoding.

[0027] The definition of "Rx beam" is equivalent to a QCL state, a TCI state, a spatial relationship state, a spatial filter, an Rx spatial filter, and an Rx precoding.

[0028] The definition of "beam ID" is equivalent to a QCL state index, a TCI state index, a spatial relationship state index, a reference signal index, a spatial filter index, and a precoding index.

[0029] Specifically, the spatial filter can be either on the UE side or on the gNB side, and the spatial filter is also known as a spatial domain filter.

[0030] It should be noted that the "spatial relationship information" consists of one or more reference RSs and is used to represent the "spatial relationship" between a target "RS or channel" and one or more reference RSs, where "spatial relationship" means identical / quasi-identical beams, identical / quasi-identical spatial parameters, and identical / quasi-identical spatial domain filters.

[0031] Note that "spatial relationships" refers to beams, spatial parameters, and spatial domain filters.

[0032] It should be noted that a "QCL state" consists of one or more of a reference RS and corresponding QCL type parameters, which include at least one of the following aspects or combinations: [1] Doppler spread, [2] Doppler shift, [3] delay spread, [4] mean delay, [5] mean gain, and [6] spatial parameters (also known as spatial Rx parameters).

[0033] In this document, "TCI state" is equivalent to "QCL state". The definitions of "QCL-TypeA", "QCL-TypeB", "QCL-TypeC", and "QCL-TypeD" are as follows: - "QCL-TypeA": {Doppler shift, Doppler spread, average delay, delay spread} - "QCL-TypeB": {Doppler shift, Doppler spread} - "QCL-TypeC": {Doppler shift, average delay} - "QCL-TypeD": {Spatial Rx parameters}

[0034] Note that "UL signals" can be PRACH, PUCCH, PUSCH, UL DMRS, and SRS.

[0035] Note that the "DL signal" can be PDCCH, PDSCH, SSB, DL DMRS, and CSI-RS.

[0036] It should be noted that group-based reporting includes at least one of "beam group"-based reporting and "antenna group"-based reporting.

[0037] Note that the definition of "beam group" means that different Tx beams within the same group may be received or transmitted simultaneously, and / or Tx beams between different groups may not be received or transmitted simultaneously. The definition of "beam group" is described from the perspective of a UE.

[0038] Note that "BM RS" means beam management reference signal, which can be CSI-RS, SSB or SRS.

[0039] Note that a "BM RS group" is equivalent to a "grouping of one or more BM reference signals," and BM RSs from a group are associated with the same TRP.

[0040] Please note that "group information" refers to "information grouping one or more reference signals," "transmit / receive point (TRP)," "resource set," "panel," "subarray," "antenna group," "antenna port group," "group of antenna ports," "beam group," "physical cell index (PCI)," "TRP index," "CORESET pool ID," or "UE capability set."

[0041] Note that the "TRP index" is equivalent to the "TRP ID" used to distinguish between different TRPs.

[0042] Note that "Panel ID" is equivalent to UE Panel Index.

[0043] Embodiment 1: Dynamic Switching Mode Configuration In Rel-16, the URLLC extension for MTRP agreed that two PDSCHs from two TRPs can be scheduled.

[0044] Figure 3 shows that DCI from TRP1 can schedule data 1 (PDSCH1) from TRP1 and data 2 (PDSCH2) from TRP2, respectively. In a single DCI-based MTRP scenario, four schemes can be used. Note that Figure 3 is only one example embodiment of scheduled data. Scheduled data is not limited to PDSCH, and others such as PUCCH / PUSCH can be used.

[0045] Scheme 1a: The UE is indicated by two TCI states in the codepoints of the DCI field "Transmission Configuration Indication" and DM-RS ports in two CDM groups in the DCI field "Antenna Ports".

[0046] Scheme 2a: The UE is indicated by two TCI states in the codepoints of the DCI field "Transmission Configuration Indicator" and a DM-RS port in one CDM group in the DCI field "Antenna Port". At the same time, the repetition scheme is set to "FDMSchemeA".

[0047] Scheme 2b: The UE indicates two TCI states in the codepoints of the DCI field "Transmission Configuration Indicator" and a DM-RS port in one CDM group in the DCI field "Antenna Port". At the same time, the repetition scheme is set to "FDMSchemeB".

[0048] Scheme 3: The UE is indicated by two TCI states in the codepoints of the DCI field "Transmission Configuration Indicator" and the DM-RS port in one CDM group in the DCI field "Antenna Port". At the same time, the repetition scheme is set to "TDMSchemeA".

[0049] Scheme 4: The UE indicates one or two TCI states in the codepoints of the DCI field "Transmission Configuration Indicator" and the DM-RS ports in one CDM group in the DCI field "Antenna Ports". At the same time, the number of repetitions is set to 2, 3, 4, 5, 6, 7, 8, or 16.

[0050] As analyzed above, in the MTRP scenario, the UE is instructed that the codepoint contains two TCI states for receiving data of two TRPs. However, if the gNB wants to perform dynamic switching (the DCI only needs to schedule the transmission of Data 1 or Data 2), the UE cannot identify which of the multiple TCI states should be used.

[0051] The mode should be configured by the gNB.

[0052] In some implementations, the dynamic switching mode can be explicitly configured by the RRC according to one recurring scheme.

number

number

[0053] In some implementations, the dynamic switching mode can be configured by RRC according to new RRC parameters such as DynamicSwitch-r18.

[0054] In some implementations, the dynamic switching mode can be configured by the MAC-CE.

[0055] In some implementations, the dynamic switching mode may be implicitly indicated by the RRC according to the value of the recurrence parameter.

[0056] In some implementations, the repetition parameter may be RepNum16 in pdsch-TimeDomainAllocationList. The UE may be expected as indicated by the DCI field "Time Domain Resource Allocation" indicating an entry in pdsch-TimeDomainAllocationList with RepNum16=N.

[0057] Note that N may represent a value other than those configurable in the current specification (e.g., 0 or 1).

[0058] FIG. 6 shows a method of wireless communication, the method including receiving, by a wireless communication device, a first parameter indicated by a first signaling message from a network device; receiving, by the wireless communication device, a plurality of transmission configuration states from the network device by a second signaling message; and determining, by the wireless communication device, a plurality of transmission configuration states for a transmission, the plurality of transmission configuration states including a transmission configuration indicator (TCI) state.

[0059] FIG. 6 shows a method of wireless communication, the method including: transmitting, by a network device, a first parameter indicated by a first signaling message to the wireless communication device; transmitting, by the network device, a plurality of transmission configuration states to the wireless communication device by a second signaling message; and determining, by the wireless communication device, a plurality of transmission configuration states for transmission, the plurality of transmission configuration states including a transmission configuration indicator (TCI) state.

[0060] Embodiment 2: TCI Status Indication by MAC-CE After the gNB indicates the dynamic switching mode according to the first embodiment, the UE further selects from the previously indicated TCI states. The specific selection principle can be indicated by the MAC-CE.

[0061] Explicit indication means that the first index can be used to indicate which TCI state is used for the scheduled channel.

[0062] For example, a first index is configured for each TCI state, and a first index value of 1 indicates that the TCI state is used for transmission after dynamic switching, and a first index value of 0 indicates that the TCI state is not used for transmission after dynamic switching.

[0063] For example, if the MAC-CE is configured with multiple codepoints, the DCI may select one codepoint for transmission. Table 1 below shows two codepoint configurations for the MAC-CE and DCI to select the first codepoint for the UE. [Table 1]

[0064] For example, the first index is configured for each TCI state code point, and a first index value of 0 indicates that the first TCI state is used for transmission after dynamic switching, and a first index value of 1 indicates that the second TCI state is used for transmission after dynamic switching.

[0065] As shown in Figure 4, based on the above selection, the UE can receive multiple PDSCHs at t1. After receiving a dynamic switching indication from the gNB, the UE determines TCI state 2 for subsequent transmissions according to the MAC-CE configuration. Therefore, at t2, the UE is only used to receive PDSCH2 from TRP2 associated with TCI state 2. Note: The use of PDSCH in Figure 4 is for illustrative purposes only and should not be construed as limited to PDSCH. Other forms, such as PUCCH / PUSCH, can also be used.

[0066] Implicit indication: A default rule can be used to indicate which TCI state is to be used for a scheduled channel.

[0067] If one TCI state codepoint is indicated by the DCI, the first TCI state in the codepoint is used for the scheduled channel.

[0068] If one TCI state codepoint is indicated by the DCI, the TCI state associated with the lowest group information index (e.g., CORESETPoolIndex) in the codepoint is used for the scheduled channel.

[0069] If one TCI state codepoint is indicated by the DCI, the TCI state associated with the same group information index (e.g., CORESETPoolIndex) with the DCI in the codepoint is used for the scheduled channel.

[0070] If multiple TCI state codepoints are activated by the MAC-CE, the codepoints contain only the TCI state associated with the same Group Information Index value, and the codepoint with the lowest index is used for the scheduled channel.

[0071] DCI formats:

[0072] If the transmission is scheduled according to DCI format 1_0 / 1_1, the TCI field is not included in the DCI. The UE uses the TCI codepoint indicated by the latest DCI together with the previous TCI field in the DCI.

[0073] If the transmission is scheduled according to DCI format 1_1, the TCI field is included in the DCI. The UE uses the TCI codepoint indicated by the DCI. The UE uses the TCI codepoint indicated by the latest DCI together with the previous TCI field in the DCI.

[0074] Embodiment 3: TCI indication by DCI As disclosed in embodiment 2, in the absence of an indication of the TCI state used for dynamic switching within the MAC-CE, a new DCI field can be introduced to further indicate the TCI state selection.

[0075] Method 1: Two bits can be used for TCI state selection and TCI state transmission order selection. [Table 2]

[0076] As shown in Table 2, 00 and 01 are used for dynamic TCI state selection. Note that "TRP1 / 2" here is not the actual index of the TRP, but is used to distinguish different TRPs. 10 and 11 are used for TCI state transmission order, such as SDM, scheme 1a / 2a / 2b / 3 / 4 mode, etc.

[0077] Method 2: Two bits can be used for TCI state selection only. [Table 3]

[0078] As shown in Table 3, which is different from Method 1, the transmission order of TRP1 / 2 can be the default and does not need to be specifically separated.

[0079] Method 3: One bit can be used for TCI state selection.

[0080] Table 4 shows when the dynamic switching mode is set. [Table 4]

[0081] Table 5 shows that if dynamic switching mode is not configured (if dynamic switching mode is not configured and the field is still in use), one bit can be used for TCI state transmission order selection. [Table 5]

[0082] Embodiment 4: Threshold between DCI and PDSCH In this document, the UE determines the beam to be used to receive the PDSCH according to the time interval between the PDCCH and the scheduled PDSCH.

[0083] If the time interval is greater than or equal to a defined threshold, the PDSCH is received according to the beam indicated in the PDCCH.

[0084] If the time interval is less than the defined threshold, the PDSCH is received according to the default beam.

[0085] In the case of dynamic switching mode, the threshold may be ignored by the UE if the selected TCI state is included in a previous DCI indication.

[0086] As shown in Figure 5, at t1, the DCI indicates that the TCI code points include TCI1 and TCI3, and then the dynamic switching mode is triggered at t2. At time t3, the DCI indicates a code point including TCI2 and TCI3. However, according to the previous embodiment 2 or 3, TCI3 is finally selected, but TCI3 was activated in the previous DCI. Therefore, the UE does not need to consider the time interval between the PDCCH and the PDSCH (from t3 to t4). Note: This figure only takes the PDSCH as an example and is not limited to the PDSCH. It may also be PUCCH / PUSCH, etc.

[0087] Therefore, some preferred embodiments may use the following solution.

[0088] 1. A method of wireless communication, as shown in FIG. 6, comprising: receiving, by a wireless communication device, from a network device, a first parameter indicated by a first signaling message (602); receiving, by the wireless communication device, from the network device, a plurality of transmission configuration states by a second signaling message (604); and determining, by the wireless communication device, a plurality of transmission configuration states for transmission (606), wherein the plurality of transmission configuration states include a transmission configuration indicator (TCI) state (608).

[0089] 2. The method of solution 1, wherein the first signaling message includes radio resource control (RRC) signaling.

[0090] 3. The method of item 1, wherein the first signaling message includes medium access control control element (MAC-CE) signaling.

[0091] 4. The method according to solution 1, wherein the first parameter indicates a switching mode.

[0092] 5. The method according to solution 1, wherein the first parameter is further determined according to the value of the iteration parameter.

[0093] 6. The method of solution 1, wherein the second signaling message includes MAC-CE signaling.

[0094] 7. The method of solution 1, wherein the plurality of transmission configuration states are determined according to a first index value in the second signaling message.

[0095] 8. The method according to solution 1, wherein the plurality of transmission configuration states are determined by a TCI state set indicated by downlink control information (DCI).

[0096] 9. The method of solution 8, wherein the multiple transmission configuration states are further determined by one or more of the following: a TCI state in the TCI state set in order, a TCI state in the TCI state set associated with the lowest group information index value, and a TCI state in the TCI state set associated with the same group information index value as the group information index of the DCI.

[0097] 10. The method according to Solution 1, wherein multiple transmission configuration states are determined by codepoints that include only TCI states associated with the same group information index value, and the codepoint is activated by the MAC-CE with the lowest index.

[0098] 11. The method of solution 1, wherein the second signaling message includes DCI signaling.

[0099] 12. The method of solution 11, wherein the DCI signaling further includes one or more of the following: TCI state selection information, and TCI state transmission order information.

[0100] 13. The method of solution 11, further comprising: for TCI fields not presented in the DCI, the multiple transmission configuration states are determined by TCI fields in the most recent DCI with previous TCI fields in the DCI.

[0101] 14. A method of wireless communication, as shown in FIG. 7, comprising: transmitting, by a network device, to a wireless communication device, first parameters indicated by a first signaling message (702); transmitting, by the network device, to the wireless communication device, a plurality of transmission configuration states by a second signaling message (704); and determining, by the wireless communication device, a plurality of transmission configuration states for transmission (706), wherein the plurality of transmission configuration states include a transmission configuration indicator (TCI) state (708).

[0102] 15. The method of solution 14, wherein the first signaling message includes radio resource control (RRC) signaling.

[0103] 16. The method of solution 14, wherein the first signaling message includes medium access control control element (MAC-CE) signaling.

[0104] 17. The method of solution 14, wherein the first parameter indicates a switching mode.

[0105] 18. The method of solution 14, wherein the first parameter is further determined according to a value of an RRC parameter.

[0106] 19. The method of solution 14, wherein the second signaling message includes MAC-CE signaling.

[0107] 20. The method of solution 14, wherein the plurality of transmission configuration states are determined according to a first index value in the second signaling message.

[0108] 21. The method of solution 14, wherein the multiple transmission configuration states are determined by a TCI state set indicated by the DCI.

[0109] 22. The method of solution 21, wherein the multiple transmission configuration states are further determined by one or more of the following: a TCI state in the TCI state set in order, a TCI state in the TCI state set associated with the lowest group information index value, and a TCI state in the TCI state set associated with the same group information index value as the group information index of the DCI.

[0110] 23. The method according to solution 14, wherein multiple transmission configuration states are determined by codepoints that include only TCI states associated with the same group information index value, and the codepoint is activated by the MAC-CE with the lowest index.

[0111] 24. The method of solution 14, wherein the second signaling message includes DCI signaling.

[0112] 25. The method of solution 24, wherein the DCI signaling further includes one or more of the following: TCI state selection information, and TCI state transmission order information.

[0113] 26. The method according to the solution, further comprising: for TCI fields not presented in the DCI, the plurality of transmission configuration states are determined by TCI fields in the latest DCI with the previous TCI fields of the DCI.

[0114] 27. An apparatus for wireless communication, comprising a processor configured to implement a method according to any one of items 1 to 26.

[0115] 28. A computer-readable medium having code stored thereon, the code, when executed by a processor, causing the processor to perform the method of any of items 1-26.

[0116] It will be appreciated that various techniques have been disclosed to enable improved cell coverage and reduced adverse effects of blocking. With the gradual standardization of the MTRP technology, the MTRP technology will be fundamentally improved with the evolution of R16 / 17. In the URLLC scenario, one DCI can schedule multiple PDSCHs from different TRPs or multiple PUSCHs facing different TRPs. However, in this scenario, if a gNodeB wants to schedule independent PDSCHs, whether the PDSCHs are from the TRP where the DCI is transmitted or from another TRP that does not have a clear indication for the UE, the UE may not be able to use the correct beam for reception. Therefore, one beneficial aspect proposes a method for solving the problem of how to configure the UE's mode and TCI state indication when a gNB performs dynamic switching in an MTRP scenario.

[0117] Some of the embodiments described herein are described in the general context of methods or processes that may be implemented in one embodiment by a computer program product embodied in a computer-readable medium containing computer-executable instructions, such as program code, executed by computers in a network environment. Computer-readable media may include removable and non-removable storage devices, including, but not limited to, read-only memory (ROM), random access memory (RAM), compact discs (CDs), digital versatile discs (DVDs), and the like. Thus, computer-readable media may include non-transitory storage media. Generally, program modules may include routines, programs, objects, components, data structures, and the like that perform particular tasks or implement particular abstract data types. Computer- or processor-executable instructions, associated data structures, and program modules represent examples of program code for executing steps of the methods disclosed herein. A particular sequence of such executable instructions or associated data structures represents examples of corresponding acts for implementing the functions described in such steps or processes.

[0118] Some of the disclosed embodiments may be implemented as devices or modules using hardware circuits, software, or a combination thereof. For example, a hardware circuit implementation may include discrete analog and / or digital components integrated, for example, as part of a printed circuit board. Alternatively or additionally, the disclosed components or modules may be implemented as application-specific integrated circuits (ASICs) and / or field-programmable gate array (FPGA) devices. Some implementations may additionally or alternatively include a digital signal processor (DSP), which is a dedicated microprocessor with an architecture optimized for the operational needs of digital signal processing associated with the disclosed functionality of the present application. Similarly, various components or subcomponents within each module may be implemented in software, hardware, or firmware. Connections between modules and / or components within modules may be provided using any one of the connection methods and mediums known in the art, including, but not limited to, communication via the Internet, wired, or wireless networks using appropriate protocols.

[0119] While this document contains many details, these should not be construed as limitations on the scope of the claimed invention or the document that may be claimed, but rather as descriptions of features specific to particular embodiments. Certain features described in this document in the context of separate embodiments can also be implemented in combination in a single embodiment. Conversely, various features described in the context of a single embodiment can also be implemented in multiple embodiments separately or in any suitable subcombination. Furthermore, while features may be described above as acting in a particular combination and initially claimed as such, one or more features from a claimed combination may, in some cases, be cut from the combination, and the claimed combination may be directed to a subcombination or a variation of the subcombination. Similarly, although operations are shown in the figures in a particular order, this should not be understood as requiring such operations to be performed in the particular order shown, or in any sequential order, or that all of the illustrated operations be performed, to achieve desirable results.

[0120] Based on what is described and illustrated in this document, only some implementations and examples are given, and other implementations, extensions and variations can be made.

Claims

1. 1. A method of wireless communication, said method comprising: receiving, by a wireless communication device, a switching mode indicated by a first signaling message from a network device, the switching mode configured to indicate a selection of a transmission configuration indicator (TCI) state from a plurality of TCI states for downlink reception; the wireless communication device receiving, from the network device, configuration information for a plurality of code point values ​​indicating the plurality of TCI states in a Medium Access Control-Control Element (MAC-CE) signaling message, wherein for each code point value of the plurality of code point values, the MAC-CE signaling message includes a first index indicating that one TCI state or two TCI states corresponding to that code point value are being used; receiving, by the wireless communication device, downlink control information (DCI) signaling, the DCI signaling including a TCI codepoint indication; determining, by the wireless communication device, the TCI state applicable for transmission based on the DCI signaling; performing said transmission in accordance with said TCI status; A method comprising:

2. The method of claim 1 , wherein the first signaling message comprises radio resource control (RRC) signaling.

3. The method of claim 1 , wherein the transmission includes at least a downlink transmission or an uplink transmission.

4. The method of claim 1 , wherein the MAC-CE signaling message includes a serving cell ID and a bandwidth portion (BWP) ID.

5. 2. The method of claim 1, wherein for each codepoint value, the first index includes a first value corresponding to a first TCI state and a second value corresponding to a second TCI state, the first value being 1 indicating that the first TCI state is used for the transmission, and the second value being 1 indicating that the second TCI state is used for the transmission.

6. 1. A method of wireless communication, said method comprising: transmitting, by a network device, a switching mode indicated by a first signaling message to a wireless communication device, the switching mode being configured to indicate a selection of a transmission configuration indicator (TCI) state from a plurality of TCI states for downlink transmission; The network device transmits configuration information for a plurality of code point values ​​indicating the plurality of TCI states in a Medium Access Control-Control Element (MAC-CE) signaling message to the wireless communication device, wherein for each code point value of the plurality of code point values, the MAC-CE signaling message includes a first index indicating that one TCI state or two TCI states corresponding to that code point value are used for transmission; the network device transmitting downlink control information (DCI) signaling to the wireless communication device, the DCI signaling including a TCI codepoint indication; performing the transmission according to the TCI state determined based on the TCI codepoint indication in the DCI signaling; A method comprising:

7. The method of claim 6 , wherein the first signaling message comprises radio resource control (RRC) signaling.

8. The method of claim 6 , wherein the transmission includes at least a downlink transmission or an uplink transmission.

9. The method of claim 6 , wherein the MAC-CE signaling message includes a serving cell ID and a bandwidth portion (BWP) ID.

10. 7. The method of claim 6, wherein for each codepoint value, the first index includes a first value corresponding to a first TCI state and a second value corresponding to a second TCI state, the first value being 1 indicating that the first TCI state is used for the transmission, and the second value being 1 indicating that the second TCI state is used for the transmission.

11. An apparatus for wireless communication, said apparatus comprising a processor configured to perform the method according to any of claims 1 to 5.

12. A computer readable medium having stored thereon code which, when executed by a processor, causes the processor to perform the method according to any one of claims 1 to 5.

13. An apparatus for wireless communication, said apparatus comprising a processor configured to perform the method according to any of claims 6 to 10.

14. A computer readable medium having stored thereon code which, when executed by a processor, causes the processor to perform the method according to any one of claims 6 to 10.

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