Method and system for enhanced transmission configuration indicator framework - Patents.com

Abstract

A method and system for techniques relating to enhancing a transmission configuration indicator framework in a wireless network are disclosed. In one implementation, a method of wireless communication includes receiving, by a wireless device, a first parameter indicated by a first signaling message from a network device, determining, by the wireless device, a mapping relationship between a plurality of transmission configuration states and a plurality of sets of group information according to the first parameter, receiving, by the wireless device, an indication of whether a transmission configuration state is activated according to the at least one first signaling message, receiving, by the wireless device, an indication of the plurality of transmission configuration states according to a second signaling message, and applying, by the wireless device, the plurality of transmission configuration states to a transmission.

Description

[Technical field]

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

[0002] background Mobile communication technologies are moving the world towards an increasingly connected and networked society. The rapid growth of mobile communications 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. Various technologies are being discussed, including new methods to provide higher quality of service, longer battery life, and improved performance. Summary of the Invention [Means for solving the problem]

[0003] overview This patent document describes, among other things, techniques for enhancing a transmission configuration indicator framework in wireless networks.

[0004] In one aspect, a method of data communication is disclosed, the method including: receiving, by a wireless device, from a network device, a first parameter indicated by a first signaling message, determining, by the wireless device, a mapping relationship between a plurality of transmission configuration states and a plurality of sets of group information according to the first parameter, receiving, by the wireless device, an indication of whether a transmission configuration state is activated according to the at least one first signaling message, receiving, by the wireless device, an indication of the plurality of transmission configuration states according to a second signaling message, and applying, by the wireless device, the plurality of transmission configuration states to a transmission.

[0005] In another aspect, a method of data communication is disclosed, the method including: configuring, by a network device, a plurality of transmission configuration indicator states for beam direction corresponding respectively to a plurality of sets of group information, transmitting, by the network device, a signaling message to a wireless device to indicate a mapping relationship between the plurality of transmission configuration indicator states for beam direction and the plurality of sets of group information according to the signaling message, and communicating between the network device and the wireless device using the plurality of sets of group information.

[0006] In another exemplary aspect, a wireless communication apparatus is disclosed comprising a processor configured to implement the above-described method.

[0007] In another exemplary aspect, a computer storage medium having stored thereon code for implementing the methods described above is disclosed.

[0008] These and other aspects are described herein. The present invention provides, for example, the following: (Item 1) 1. A method of wireless communication, comprising: receiving, by the wireless device, from the network device, a first parameter indicated by a first signaling message; determining, by the wireless device, a mapping relationship between a plurality of transmission configuration states and a plurality of sets of group information according to the first parameter; receiving, by the wireless device, an indication of whether the transmission configuration state is activated according to at least one first signaling message; receiving, by the wireless device, an indication of the plurality of transmission configuration states according to a second signaling message; applying, by the wireless device, the plurality of transmit configuration states to a transmission; A method comprising: (Item 2) 2. The method of claim 1, wherein the plurality of transmission configuration states includes a transmission configuration indicator (TCI) state. (Item 3) 2. The method of claim 1, wherein the first signaling message comprises a Radio Resource Control (RRC) message or a Medium Access Control (MAC) Control Element (MAC-CE) message. (Item 4) 2. The method of claim 1, wherein the first parameter includes a first index indicating the mapping relationship between the plurality of transmission configuration states and the plurality of sets of group information. (Item 5) 5. The method according to any one of items 3 to 4, wherein the RRC message includes the first index in each pool or subpool for a transmission configuration indicator (TCI) state. (Item 6) 5. The method according to any one of items 3 to 4, wherein the MAC-CE messages include the first index within each MAC-CE message. (Item 7) The first index is Control resource set pool index, TCI State Pool Index, Physical Cell Index (PCI), Transmitting / receiving point identifier (TRP-ID), User Equipment (UE) Capability Index, A channel state information reference signal (CSI-RS) resource set index, or Sounding Reference Signal (SRS) Resource Set Index The method according to any one of items 5 to 6, comprising at least one of the following: (Item 8) 2. The method of claim 1, wherein the at least one first signaling message includes a single MAC Control element configured to activate one or more transmission configuration indicator code points. (Item 9) 9. The method of claim 8, wherein the one or more transmission configuration indicator code points include a transmission configuration indicator code point for a joint indication including one or more transmission configuration indicator states. (Item 10) 10. The method of claim 9, wherein each transmission configuration indicator state is applicable to both downlink and uplink transmissions. (Item 11) Item 11. The method of item 10, wherein the single MAC Control element further indicates multiple flags to indicate an association between multiple sets of group information and multiple transmission configuration indicator states. (Item 12) 9. The method of claim 8, wherein the one or more transmission configuration indicator code points include a transmission configuration indicator code point for a separate indication including at least one transmission configuration indicator state. (Item 13) 10. The method of claim 9, wherein each transmission configuration indicator state is applicable to downlink transmission or uplink transmission. (Item 14) Item 14. The method of item 13, wherein the single MAC Control element further indicates multiple flags to indicate an association between multiple sets of group information and multiple transmission configuration indicator states. (Item 15) Item 14. The method of item 13, wherein the single MAC control element further indicates multiple flags to indicate an association between multiple downlink or uplink transmissions and multiple transmission configuration indicator states. (Item 16) Item 14. The method of item 13, wherein an index of the reference signal for the transmission configuration indicator state is configured as a different index for downlink transmission or uplink transmission. (Item 17) 2. The method of claim 1, wherein the at least one first signaling message includes two or more MAC control elements configured to activate one or more transmission configuration indicator code points corresponding to two or more sets of group information, respectively. (Item 18) Item 18. The method of item 17, wherein each MAC Control element includes a first field for indicating a mapping relationship between the two or more MAC Control elements and the two or more sets of group information. (Item 19) 20. The method of claim 17, wherein the transmission configuration indicator code points for separate instructions include at least one transmission configuration indicator state. (Item 20) 20. The method of claim 19, wherein each transmission configuration indicator state is applicable to downlink transmission or uplink transmission. (Item 21) 21. The method of claim 20, wherein the MAC control element further indicates a plurality of flags to indicate an association between a plurality of downlink or uplink transmissions and a plurality of transmission configuration indicator states. (Item 22) 21. The method of claim 20, wherein an index of the reference signal of the transmission configuration indicator state is configured as a different index for downlink transmission or uplink transmission. (Item 23) 2. The method of claim 1, wherein the second signaling message includes a downlink control information (DCI) signaling including a first field for indicating a codepoint including one or more transmission configuration indicator states. (Item 24) 24. The method of claim 23, wherein the one or more transmission configuration indicator states in the code point correspond to a transmission / reception point, and the wireless device is configured to switch from a first mode for multiple sets of group information to a second mode for a single transmission / reception point. (Item 25) 24. The method of claim 23, wherein the one or more transmission configuration indicator states in the code point correspond to a transmission / reception point, and the wireless device is configured to update the transmission / reception point according to the indicated code point. (Item 26) 26. A method according to any one of items 24 to 25, wherein the wireless device is configured to switch the first mode for multiple sets of group information to the second mode for a single transmission / reception point or update the transmission / reception point by an RRC message. (Item 27) 24. The method of claim 23, wherein the first field can be configured to be greater than 3 bits. (Item 28) 2. The method of claim 1, wherein the second signaling message includes a downlink control information (DCI) signaling including a plurality of fields corresponding to a plurality of sets of group information to indicate a plurality of transmission configuration indicator status code points. (Item 29) 1. A method of wireless communication, comprising: configuring, by the network device, a plurality of transmit configuration indicator states for beam direction corresponding respectively to a plurality of sets of group information; Sending, by the network device, a signaling message to a wireless device to indicate a mapping relationship between the plurality of transmission configuration indicator states for beam direction and the plurality of sets of group information according to the signaling message; communicating between the network device and the wireless device using the plurality of sets of group information; A method comprising: (Item 30) 30. An apparatus for wireless communication comprising a processor configured to execute a method according to any one of items 1 to 29. (Item 31) A non-transitory computer readable medium having code stored thereon, the code, when executed by a processor, causing the processor to implement a method according to any one of items 1 to 29. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 illustrates an example of a wireless communication system in accordance with some exemplary embodiments of the disclosed technology.

[0010] [Diagram 2] FIG. 2 is a block diagram representation of a portion of an apparatus according to some embodiments of the disclosed technology.

[0011] [Diagram 3] FIG. 3 illustrates the relationship between the transmission configuration indicator (TCI) state and group information.

[0012] [Figure 4] FIG. 4 illustrates examples of activated code points according to some implementations of the disclosed technology.

[0013] [Diagram 5] FIG. 5 illustrates an example of UE-specific Physical Downlink Shared Channel (PDSCH) MAC-CE enhanced TCI state activation and deactivation.

[0014] [Figure 6] FIG. 6 illustrates an example of flags for indicating each TCI state according to some implementations of the disclosed technology.

[0015] [Figure 7] FIG. 7 illustrates example code points according to some implementations of the disclosed technology.

[0016] [Figure 8] FIG. 8 illustrates an example of a field for indicating a relationship between a MAC-CE and group information according to some implementations of the disclosed technology.

[0017] [Figure 9] FIG. 9 illustrates example codepoints, where each TCI codepoint includes only one TCI state according to some implementations of the disclosed technology.

[0018] [Figure 10] FIG. 10 illustrates example code points according to some implementations of the disclosed technology.

[0019] [Figure 11] FIG. 11 illustrates an example process for wireless communication in accordance with some exemplary embodiments of the disclosed technology.

[0020] [Figure 12]FIG. 12 illustrates another example of a process for wireless communication in accordance with some exemplary embodiments of the disclosed technology. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] Detailed Description Section headings are used in this document for ease of understanding only and are not intended to limit the scope of the embodiments to the section they are written in. Furthermore, although the embodiments are described with reference to 5G examples, the disclosed techniques may be applied to wireless systems using protocols other than 5G or 3GPP protocols.

[0022] The multiple transmission and reception point (TRP) technique uses multiple transmission and reception points (TRPs) to effectively improve the transmission throughput in Long Term Evolution (LTE), Long Term Evolution-Advanced (LTE-A), and New Radio Access Technologies (NR) in enhanced mobile broadband (eMBB) scenarios. In addition, the use of multiple TRP transmission or reception can effectively reduce the probability of information jamming and improve the transmission reliability in ultra-reliable and low latency communications (URLLC) scenarios.

[0023] According to the mapping relationship between the transmitted signal flow and multi-TRP / panel, coordinated multipoint transmission / reception can be divided into two types: (1) coherent transmission and (2) non-coherent transmission. For coherent transmission, each data layer is mapped to multiple TRP / panels through 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.

[0024] In contrast, non-coherent joint transmission (NCJT) is less susceptible to the above factors. Therefore, NCJT is the main consideration in R15 coordinated multipoint transmission / reception. NCJT means that each data flow is only mapped to ports that correspond 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, without the need to treat all TRPs as virtual arrays.

[0025] A unified TCI framework was introduced in Rel-17 to unify uplink and downlink transmission configuration indicator (TCI) status indication modes. That is, the spatial relationship and power control parameters for uplink transmission are replaced by the TCI status. However, the current framework is only applicable to a single set of group information (e.g., single transmission / reception point STRP) scenario. Therefore, enhancement of the unified TCI framework for multiple sets of group information (e.g., multiple transmission / reception points MTRP) needs to be further explored.

[0026] FIG. 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, the 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, the 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.

[0027] 2 is a block diagram representation of a portion of an apparatus according to some embodiments of the disclosed techniques. An apparatus 205, such as a network device or base station or wireless device (or UE), can include processor electronics 210, such as a microprocessor, that implements one or more of the techniques presented herein. The apparatus 205 can include transceiver electronics 215 that transmits and / or receives wireless signals via one or more communication interfaces, such as an antenna 220. The apparatus 205 can include other communication interfaces for transmitting and receiving data. The apparatus 205 can include one or more memories (not explicitly shown) configured to store information, such as data and / or instructions. In some implementations, the processor electronics 210 can include at least a portion of the transceiver electronics 215. In some embodiments, at least some of the disclosed techniques, modules, or functions are implemented using the apparatus 205.

[0028] In some embodiments of the disclosed technology, the term “beam” refers to a quasi-co-location (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.

[0029] In some embodiments of the disclosed technology, the term "Tx beam" refers to a QCL state, a TCI state, a spatial relationship state, a DL / UL reference signal (e.g., a Channel State Information Reference Signal (CSI-RS), a Synchronization Signal Block (SSB) (also called SS / PBCH), a Demodulation Reference Signal (DMRS), a Sounding Reference Signal (SRS), and a Physical Random Access Channel (PRACH)), a Tx spatial filter, or a Tx precoding.

[0030] In some embodiments of the disclosed technology, the term "Rx beam" refers to a QCL state, a TCI state, a spatial relationship state, a spatial filter, an Rx spatial filter, or an Rx precoding.

[0031] In some embodiments of the disclosed technology, the term "beam ID" refers to a QCL state index, a TCI state index, a spatial relationship state index, a reference signal index, a spatial filter index, or a precoding index.

[0032] In some embodiments of the disclosed technology, the spatial filter may be either on the UE side or the gNB side, and the spatial filter may also be referred to as a spatial domain filter.

[0033] In some embodiments of the disclosed technology, the “spatial relationship information” includes one or more reference RSs used to represent a “spatial relationship” between a target “RS or channel” and one or more reference RSs, where the “spatial relationship” indicates the same / quasi-identical beam, the same / quasi-identical spatial parameters, or the same / quasi-identical spatial domain filter.

[0034] In some embodiments of the disclosed technology, a "spatial relationship" refers to a beam, a spatial parameter, or a spatial domain filter.

[0035] In some embodiments of the disclosed technology, a "QCL state" includes one or more reference RSs and their corresponding QCL type parameters, where the QCL type parameters include at least one of the following aspects or combinations: (1) Doppler spread, (2) Doppler shift, (3) delay spread, (4) average delay, (5) average gain, and (6) spatial parameters (also referred to as spatial Rx parameters).

[0036] In some embodiments of the disclosed technology, the term "TCI state" refers to "QCL state."

[0037] In some embodiments of the disclosed technology, "QCL-TypeA" indicates {Doppler shift, Doppler spread, average delay, delay spread}, "QCL-TypeB" indicates {Doppler shift, Doppler spread}, "QCL-TypeC" indicates {Doppler shift, average delay}, and "QCL-TypeD" indicates {spatial Rx parameters}.

[0038] In some embodiments of the disclosed technology, the "UL signal" may be a PRACH, a PUCCH, a PUSCH, an UL DMRS, or an SRS.

[0039] In some embodiments of the disclosed technology, the "DL signal" may be a PDCCH, a PDSCH, an SSB, a DL DMRS, or a CSI-RS.

[0040] In some embodiments of the disclosed technology, group-based reporting includes at least one of "beam group" based reporting and "antenna group" based reporting.

[0041] In some embodiments of the disclosed technology, the term "beam group" indicates that different Tx beams within a group may be received or transmitted simultaneously and / or that Tx beams between different groups may not be received or transmitted simultaneously. Also, the definition of "beam group" is described from the perspective of a UE.

[0042] In some embodiments of the disclosed technology, the term "BM RS" refers to a beam management reference signal, such as CSI-RS, SSB or SRS.

[0043] In some embodiments of the disclosed technology, the term "BM RS group" refers to a "grouping of one or more BM reference signals," where BM RSs from a group are associated with the same TRP.

[0044] In some embodiments of the disclosed technology, the term "TRP-ID" refers to a "TRP index" used to distinguish different TRPs.

[0045] In some embodiments of the disclosed technology, the term "Panel ID" refers to a UE panel index.

[0046] In some embodiments of the disclosed technology, the term "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."

[0047] Embodiment 1: Association between TCI status and group information such as TRP

[0048] In Rel-17, the unified TCI framework includes both downlink / uplink (DL / UL) common pools and separate pools. The TCI status in the common pool can be indicated for downlink or uplink transmissions, or both downlink and uplink transmissions. However, the TCI status from the DL separate pool can only be indicated for downlink transmissions. Furthermore, the TCI status from the UL separate pool can only be indicated for uplink transmissions.

[0049] FIG. 3 illustrates the relationship between the transmission configuration indicator (TCI) state and group information.

[0050] To apply the R17 unified TCI framework to multiple sets of group information (e.g., MTRP) scenarios, the UE needs to know which group information the configured TCI corresponds to. Therefore, the UE needs to know the association between the TCI state and the group information (e.g., TRP), as shown in Figure 3.

[0051] In some implementations, the relationship or association between the TCI state and the TRP may be indicated by a radio resource control (RRC) or a medium access control (MAC) control element (MAC-CE).

[0052] In the case of an RRC indication, the gNB may configure N TCI state sub-pools / pools, each corresponding to N sets of group information (e.g., N TRPs), and the association between the TCI state and the group information (e.g., TRPs) may be indicated by a parameter in each sub-pool / pool.

[0053] For a MAC-CE indication, N MAC-CEs may be used to activate TCI state code points, each corresponding to N sets of group information (e.g., N TRPs). The association between the TCI state and the group information (e.g., TRPs) may be indicated by a parameter in each MAC-CE.

[0054] In a multiple DCI scenario, the UE is provided with two coresetPoolIndex values ​​0 and 1 for the first and second CORESETs, or, respectively, no coresetPoolIndex value for the first CORESET and a coresetPoolIndex value 1 for the second CORESET. Thus, coresetPoolIndex can be used as a parameter.

[0055] In single DCI scenario, the UE is not provided with coresetPoolIndex for the first and second CORESET, and a new ID such as TCI state pool ID / TRP-ID can be introduced as a parameter. Furthermore, the new ID can also be used for multiple DCI scenario.

[0056] In some implementations, an implicit index for association can be used, such as a UE capability index, a physical cell index (PCI), a CSI-RS resource set index, an SRS resource set index, etc. Additionally, the UE capability includes the number of antenna ports (e.g., SRS antenna ports), the number of layers (e.g., for PUSCH or PDSCH), or a UE panel ID / index.

[0057] In some implementations, some physical channels and TCI states may be associated according to direct indications such as parameters such as CORESET / PDCCH, PUCCH resources (groups), Type 1 PDSCH transmission with configured grant, Type 1 PUSCH transmission with configured grant, and some physical channels and TCI states may be associated according to indirect indications such as CORESET / PDCCH indications such as Type 2 PDSCH transmission with configured grant, Type 2 PUSCH transmission with configured grant, scheduled PDSCH / PUSCH, PRACH, aperiod CSI-RS / SRS, and the like.

[0058] Embodiment 2: MAC-CE Activation

[0059] In Rel-17, the unified TCI framework includes both DL / UL joint and separate indications. In the case of joint indication, a TCI state in a TCI codepoint can be used for both DL and UL transmissions. In the case of separate indication, a TCI state in a TCI codepoint can be used only for DL ​​transmissions or only for UL transmissions, or a pair of TCI states in a TCI codepoint can be used for DL ​​and UL transmissions, respectively. Joint and separate indications can be configured by RRC.

[0060] Only one MAC-CE

[0061] Joint Instructions

[0062] FIG. 4 illustrates examples of activated code points according to some implementations of the disclosed technology.

[0063] In a two sets of group information (e.g., two TRPs) scenario, one TCI codepoint can contain up to two TCI states, each of which applies to the two sets of group information (e.g., two TRPs).

[0064] In some implementations of the disclosed technology, a default matching rule may be used, for example, the first TCI state is applied to the group information (e.g., TRP) with the lowest index, the second TCI state is applied to the group information (e.g., TRP) with the second lowest index, and so on.

[0065] In some implementations of the disclosed technology, a flag may be used to provide an explicit indication.

[0066] If one TCI codepoint contains only one TCI state, the UE cannot know which group information (e.g., TRP) should apply the TCI state configured for the codepoint, as shown in the second line of Figure 4.

[0067] In some implementations of the disclosed technology, a flag may be used to explicitly indicate which group information (eg, TRP) a TCI state corresponds to.

[0068] FIG. 5 illustrates an example of UE-specific Physical Downlink Shared Channel (PDSCH) MAC-CE enhanced TCI state activation and deactivation.

[0069] FIG. 6 illustrates an example of flags for indicating each TCI state according to some implementations of the disclosed technology.

[0070] In some implementations of the disclosed technology, to enhance the unified TCI framework, a flag such as the “F” field shown in FIG. 6 may be used to indicate which group information (e.g., TRP) the TCI applies to.

[0071] Separate instructions

[0072] FIG. 7 illustrates examples of activated code points according to some implementations of the disclosed technology.

[0073] In a two sets of group information (e.g., two TRPs) scenario, one TCI codepoint can contain up to four TCI states, which apply to the two sets of group information (e.g., two TRPs) and DL and UL transmissions, respectively.

[0074] In some implementations of the disclosed technology, a default matching rule can be used, for example, a first TCI state is applied to the group information (e.g., TRP) with the lowest index and DL transmission, a second TCI state is applied to the group information (e.g., TRP) with the lowest index and DL transmission, and a second TCI state is applied to the group information (e.g., TRP) with the second lowest index and DL transmission.

[0075] In some implementations of the disclosed technology, a flag may be used to provide an explicit indication.

[0076] In some implementations, the flag may include two indicators that may be used for group information (e.g., TRP) indication and uplink / downlink indication, respectively.

[0077] In some implementations, the flag may include only one indicator used for group information (e.g., TRP) indication. For DL / UL indication, the UE may determine the DL or UL TCI state application according to an implicit indication, such as an index of the TCI state in the DL / UL TCI state pool.

[0078] In some implementations, the indices of the reference signals configured in the downlink and uplink pools are different.

[0079] If a TCI codepoint contains only less than four TCI states, the UE cannot know which group information (e.g., TRP) or which transmission direction should apply the TCI state configured for the codepoint, as shown in rows 2-4 of FIG. 7.

[0080] In some implementations, a flag is used to indicate explicitly.

[0081] In some implementations, the flag may include two indicators that may be used for group information (e.g., TRP) indication and uplink / downlink indication, respectively.

[0082] In some implementations, the flag may include only one indicator used for group information (e.g., TRP) indication. For DL / UL indication, the UE may determine the DL or UL TCI state application according to an implicit indication, such as an index of the TCI state in the DL / UL TCI state pool.

[0083] In some implementations, the indices of the reference signals configured in the downlink and uplink pools are different.

[0084] Two or more MAC-CEs

[0085] FIG. 8 illustrates an example of a field for indicating a relationship between a MAC-CE and group information (eg, a TRP) according to some implementations of the disclosed technology.

[0086] In some implementations of the disclosed technology, each MAC-CE corresponds to a set of group information (e.g., TRP), and the R field (810) in FIG. 8 can be used to indicate the relationship between the MAC-CE and the group information (e.g., TRP), as described in embodiment 1.

[0087] Joint Instructions

[0088] FIG. 9 illustrates example codepoints, where each TCI codepoint includes only one TCI state according to some implementations of the disclosed technology.

[0089] In some implementations of the disclosed technology, one TCI codepoint may contain only one TCI state.

[0090] Separate instructions

[0091] FIG. 10 illustrates example code points according to some implementations of the disclosed technology.

[0092] In some implementations, one TCI codepoint may include up to two TCI states, which apply to DL and UL transmissions, respectively.

[0093] In some implementations, a default matching rule can be used. In one example, a first TCI state is applied to group information (e.g., TRP) for DL ​​transmissions and a second TCI state is applied to group information (e.g., TRP) for UL transmissions.

[0094] In some implementations, a flag can be used to indicate explicitly.

[0095] In some implementations, as shown in FIG. 10, if one activated TCI codepoint contains only one TCI state, the UE cannot know which transmission direction (e.g., downlink or uplink transmission) should apply the TCI state configured for the codepoint.

[0096] In some implementations, a flag can be used to indicate explicitly.

[0097] In some implementations, the UE may determine DL or UL TCI state application according to an implicit indication, such as an index of a TCI state in a DL / UL TCI state pool.

[0098] In some implementations, the indices of the reference signals configured in the downlink and uplink pools are different.

[0099] Embodiment 3: DCI Indication

[0100] In case of a unified TCI framework, the DCI indicates one TCI status codepoint based on the activated TCI status codepoint. In case of only one codepoint in the MAC-CE, no DCI is required.

[0101] Only one DCI field is used for indication

[0102] In the case of multiple sets of group information (MTRP) scenarios, the restriction that the maximum number of activated TCI codepoints is eight should be extended to maintain flexibility.

[0103] The "transmission configuration indication" field can be reused and this field should be expanded to be larger than 3 bits.

[0104] In some implementations, if the DCI indicates that one codepoint includes only a TCI state corresponding to one set of group information (e.g., one TRP), the UE may perform the following operations.

[0105] (1) Mode 1: The UE can switch from multiple sets of group information (e.g., MTRP) to a single set of group information (e.g., STRP).

[0106] (2) Mode 2: The UE maintains multiple sets of group information (e.g., MTRPs) and updates only the TCI state of associated group information (e.g., TRPs).

[0107] In some implementations, the above mentioned modes may be configured by the RRC.

[0108] N DCI fields used for indication

[0109] In the case of multiple sets of group information (eg, MTRPs), N DCI fields may be used for N sets of group information (eg, N TRPs).

[0110] In some implementations, the other fields (except for the "Transmission Configuration Indicator" field, which is present) may use fields reserved by the DCI in the R17 Integrated TCI Framework. In one example, whether the other fields are present may be configured by the RRC.

[0111] FIG. 11 illustrates an example process for wireless communication in accordance with some exemplary embodiments of the disclosed technology.

[0112] In some implementations, a process 1100 for wireless communication may include, at 1110, receiving, by the wireless device, a first parameter indicated by a first signaling message from a network device; determining, by the wireless device, a mapping relationship between a plurality of transmission configuration states and a plurality of sets of group information (e.g., TRPs) according to the first parameter at 1120; receiving, by the wireless device, an indication of whether a transmission configuration state is activated according to the at least one first signaling message at 1130; receiving, by the wireless device, an indication of the plurality of transmission configuration states according to the second signaling message at 1140; and applying, by the wireless device, the plurality of transmission configuration states to a transmission at 1150.

[0113] In some implementations, the plurality of transmission configuration states includes a transmission configuration indicator (TCI) state.

[0114] In some implementations, the first signaling message includes a Radio Resource Control (RRC) message or a Medium Access Control (MAC) Control Element (MAC-CE) message.

[0115] In some implementations, the second signaling message includes downlink control information (DCI) signaling that includes a first field to indicate a codepoint that includes one or more transmission configuration indicator states.

[0116] FIG. 12 illustrates another example of a process for wireless communication in accordance with some exemplary embodiments of the disclosed technology.

[0117] In some implementations, a process 1200 for wireless communication may include, at 1210, configuring, by a network device, a plurality of transmission configuration indicator states for beam direction corresponding respectively to a plurality of group information; at 1220, transmitting, by the network device, a signaling message to the wireless device to indicate a mapping relationship between the plurality of transmission configuration indicator states for beam direction and the plurality of group information according to the signaling message; and at 1230, communicating between the network device and the wireless device using the plurality of group information.

[0118] The group information may include at least one of information grouping one or more reference signals, a transmit / receive point (TRP), a resource set, a panel, a subarray, an antenna group, an antenna port group, a group of antenna ports, a beam group, a physical cell index (PCI), a TRP index, a CORESET pool ID, or a UE capability set.

[0119] It will be appreciated that the present specification discloses techniques that may be embodied in various embodiments for determining downlink control information in a wireless network. The disclosed and other embodiments, modules and functional operations described herein may be implemented in digital electronic circuitry, or in computer software, firmware, or hardware, including the structures disclosed herein and their structural equivalents, or in one or more combinations thereof. The disclosed and other embodiments may be implemented as one or more computer program products, i.e., one or more modules of computer program instructions encoded on a computer-readable medium for execution by or for controlling the operation of a data processing apparatus. The computer-readable medium may be a machine-readable storage device, a machine-readable storage substrate, a memory device, a composition of matter that provides a machine-readable propagated signal, or one or more combinations thereof. The term "data processing apparatus" encompasses all apparatus, devices, and machines for processing data, including, by way of example, a programmable processor, a computer, or multiple processors or computers. An apparatus may include, in addition to hardware, code that creates an environment for the execution of the computer program in question, e.g., code that constitutes a processor firmware, a protocol stack, a database management system, an operating system, or one or more combinations thereof. A propagated signal is an artificially generated signal, such as a machine-generated electrical, optical, or electromagnetic signal, that is generated to encode information for transmission to an appropriate receiving device.

[0120] A computer program (also known as a program, software, software application, script, or code) can be written in any form of programming language, including compiled or interpreted languages, and can be deployed in any form, including as a stand-alone program or as a module, component, subroutine, or other unit suitable for use in a computing environment. A computer program does not necessarily correspond to a file in a file system. A program can be stored in part of a file that holds other programs or data (e.g., one or more scripts stored in a markup language document), in a single file dedicated to the program in question, or in multiple cooperating files (e.g., files that store one or more modules, subprograms, or portions of code). A computer program can be deployed to be executed on one computer, or on multiple computers located at one site or distributed across multiple sites and interconnected by a communication network.

[0121] The processes and logic flows described herein may be performed by one or more programmable processors executing one or more computer programs to perform functions by manipulating input data to generate output. The processes and logic flows may also be performed by, and an apparatus may also be implemented as, special purpose logic circuitry, such as, for example, an FPGA (field programmable gate array) or an ASIC (application specific integrated circuit).

[0122] Processors suitable for executing computer programs include, by way of example, both general purpose and special purpose microprocessors, and any one or more processors of any kind of digital computer. Generally, a processor receives instructions and data from a read-only memory or a random access memory or both. The essential elements of a computer are a processor for executing instructions and one or more memory devices for storing instructions and data. Generally, a computer also includes one or more mass storage devices for storing data, such as magnetic, magneto-optical, or optical disks, and is operatively coupled to receive data from them, transfer data to them, or both. However, a computer need not have such devices. Computer-readable media suitable for storing computer program instructions and data include, by way of example, all forms of non-volatile memory, media, and memory devices, including semiconductor memory devices such as EPROM, EEPROM, and flash memory devices; magnetic disks, such as internal hard disks or removable disks; magneto-optical disks; and CD-ROM and DVD-ROM disks. The processor and memory can be supplemented by, or incorporated in, special purpose logic circuitry.

[0123] Some embodiments may preferably implement one or more of the following solutions, enumerated in clause form. The following clauses are supported and further described in the above embodiments and throughout this document. As used in the following clauses and claims, a wireless device may be a user equipment, a mobile station, or any other wireless terminal, including a fixed node such as a base station. A network device includes a base station, including a next-generation Node B (gNB), an enhanced Node B (eNB), or any other device functioning as a base station.

[0124] Clause 1. A method of wireless communication comprising: receiving, by a wireless device, from a network device, a first parameter indicated by a first signaling message; determining, by the wireless device, a mapping relationship between a plurality of transmission configuration states and a plurality of sets of group information according to the first parameter; receiving, by the wireless device, an indication of whether a transmission configuration state is activated according to the at least one first signaling message; receiving, by the wireless device, an indication of the plurality of transmission configuration states according to a second signaling message; and applying, by the wireless device, the plurality of transmission configuration states to a transmission.

[0125] Clause 2. The method of clause 1, wherein the plurality of transmission configuration states includes a transmission configuration indicator (TCI) state.

[0126] Clause 3. The method of clause 1, wherein the first signaling message includes a radio resource control (RRC) message or a medium access control (MAC) control element (MAC-CE) message.

[0127] Clause 4. The method of clause 1, wherein the first parameter includes a first index indicating a mapping relationship between a plurality of transmission configuration states and a plurality of sets of group information.

[0128] Clause 5. The method according to any one of clauses 3 to 4, wherein the RRC message includes a first index within each pool or subpool for a transmission configuration indicator (TCI) state.

[0129] Clause 6. The method according to any one of clauses 3 to 4, wherein the MAC-CE messages include a first index within each MAC-CE message.

[0130] Clause 7. The method of any of clauses 5 to 6, wherein the first index includes at least one of a control resource set pool index; a TCI state pool index; a physical cell index (PCI); a transmission / reception point identifier (TRP-ID); a user equipment (UE) capability index; a channel state information reference signal (CSI-RS) resource set index; or a sounding reference signal (SRS) resource set index.

[0131] Clause 8. The method of clause 1, wherein the at least one first signaling message includes a single MAC control element configured to activate one or more transmission configuration indicator code points.

[0132] Clause 9. The method of clause 8, wherein the one or more transmission configuration indicator code points include a transmission configuration indicator code point for a joint indication including one or more transmission configuration indicator states.

[0133] Clause 10. The method of clause 9, wherein each transmission configuration indicator state is applicable to both downlink and uplink transmissions.

[0134] Clause 11. The method of clause 10, wherein the single MAC Control element further indicates multiple flags to indicate an association between multiple sets of group information and multiple transmission configuration indicator states.

[0135] Clause 12. The method of clause 8, wherein the one or more transmission configuration indicator code points include a transmission configuration indicator code point for a separate indication including at least one transmission configuration indicator state.

[0136] Clause 13. The method of clause 9, wherein each transmission configuration indicator state is applicable to downlink transmission or uplink transmission.

[0137] Clause 14. The method of clause 13, wherein the single MAC Control element further indicates multiple flags to indicate an association between multiple sets of group information and multiple transmission configuration indicator states.

[0138] Clause 15. The method of clause 13, wherein the single MAC Control element further indicates multiple flags to indicate an association between multiple downlink or uplink transmissions and multiple transmission configuration indicator states.

[0139] Clause 16. The method of clause 13, wherein an index of the reference signal for the transmission configuration indicator state is configured as a different index for downlink transmission or uplink transmission.

[0140] Clause 17. The method of clause 1, wherein the at least one first signaling message includes two or more MAC control elements configured to activate one or more transmission configuration indicator code points respectively corresponding to two or more sets of group information.

[0141] Clause 18. The method of clause 17, wherein each MAC Control element includes a first field for indicating a mapping relationship between two or more MAC Control elements and two or more sets of group information.

[0142] Clause 19. The method of clause 17, wherein the transmission configuration indicator code points for the separate instructions include at least one transmission configuration indicator state.

[0143] Clause 20. The method of clause 19, wherein each transmission configuration indicator state is applicable to downlink transmission or uplink transmission.

[0144] Clause 21. The method of clause 20, wherein the MAC control element further indicates a number of flags to indicate an association between a number of downlink or uplink transmissions and a number of transmission configuration indicator states.

[0145] Clause 22. The method of clause 20, wherein an index of the reference signal for the transmission configuration indicator state is configured as a different index for downlink transmission or uplink transmission.

[0146] Clause 23. The method of clause 1, wherein the second signaling message includes downlink control information (DCI) signaling including a first field for indicating a codepoint including one or more transmission configuration indicator states.

[0147] Clause 24. The method of clause 23, wherein one or more transmission configuration indicator states in the code point correspond to a transmission / reception point, and the wireless device is configured to switch from a first mode for multiple sets of group information to a second mode for a single transmission / reception point.

[0148] Clause 25. The method of clause 23, wherein one or more transmission configuration indicator states in the code point correspond to a transmission / reception point, and the wireless device is configured to update the transmission / reception point according to the indicated code point.

[0149] Clause 26. A method according to any of clauses 24 to 25, wherein the wireless device is configured to switch a first mode for multiple sets of group information to a second mode for a single transmission / reception point, or update the transmission / reception point by an RRC message.

[0150] Clause 27. The method of clause 23, wherein the first field can be configured to be greater than 3 bits.

[0151] Clause 28. The method of clause 1, wherein the second signaling message includes downlink control information (DCI) signaling including multiple fields corresponding to multiple sets of group information to indicate multiple transmission configuration indicator status code points.

[0152] Clause 29. A method of wireless communication, comprising: configuring, by a network device, a plurality of transmission configuration indicator states for beam direction respectively corresponding to a plurality of sets of group information; indicating, by the network device, a mapping relationship between the plurality of transmission configuration indicator states for beam direction and the plurality of sets of group information according to the signaling message by transmitting a signaling message to the wireless device; and communicating between the network device and the wireless device using the plurality of sets of group information.

[0153] Clause 30. An apparatus for wireless communication comprising a processor configured to execute the method according to any one of clauses 1 to 29.

[0154] Clause 31. A non-transitory computer readable medium having code stored thereon, the code, when executed by a processor, causing the processor to implement a method according to any one of clauses 1 to 29.

[0155] Some of the embodiments described herein are described in the general context of a method or process that may be implemented in one embodiment by a computer program product embodied in a computer-readable medium that includes computer-executable instructions, such as program code, executed by a computer in a network environment. The computer-readable medium may include removable and non-removable storage devices, including but not limited to read-only memory (ROM), random access memory (RAM), compact disks (CDs), digital versatile disks (DVDs), and the like. Thus, the computer-readable medium 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.

[0156] Some of the disclosed embodiments can be implemented as devices or modules using hardware circuits, software, or a combination thereof. For example, hardware circuit implementations can include separate analog and / or digital components integrated, for example, as part of a printed circuit board. Alternatively or additionally, the disclosed components or modules can be implemented as application specific integrated circuits (ASICs) and / or field programmable gate array (FPGA) devices. Some implementations may additionally or alternatively include digital signal processors (DSPs), which are dedicated microprocessors with architectures optimized for the operational needs of digital signal processing related to the disclosed functionality of the present application. Similarly, the various components or subcomponents within each module may be implemented in software, hardware, or firmware. Connections between modules and / or components within a module 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.

[0157] While this document contains many details, these should not be construed as limitations on the scope of the claimed invention or the invention that may be claimed, but rather as descriptions of features specific to particular embodiments. Certain features described herein in the context of separate embodiments may also be implemented in combination in a single embodiment. Conversely, various features described in the context of a single embodiment may also be implemented in multiple embodiments separately or in any suitable subcombination. Furthermore, although features may be described above as acting in a particular combination and initially claimed as such, one or more features from the claimed combination may, in some cases, be cut out of 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 that such operations be performed in the particular order shown, or in the sequential order, or that all of the operations shown be performed, to achieve desirable results.

[0158] Based on what has been described and illustrated in this disclosure, only some implementations and examples have been described, and other implementations, extensions and variations may be made.

Claims

1. 1. A method of wireless communication, comprising: receiving, from a network device, a first parameter indicated by a first signaling message; The wireless device determines a mapping relationship between a plurality of transmission configuration states and a plurality of sets of group information according to the first parameter, the group information including a physical cell index (PCI) or a control resource set (CORESET) pool ID; receiving, by the wireless device, information indicating whether the plurality of transmission configuration states are activated according to at least one first signaling message, the at least one first signaling message including a single medium access control (MAC) control element configured to activate one or more transmission configuration indicator code points; receiving, by the wireless device, information indicating the plurality of transmission configuration states according to a second signaling message, the second signaling message including Downlink Control Information (DCI) signaling including a plurality of fields corresponding to a plurality of sets of group information to indicate a plurality of transmission configuration indicator status code points; applying the plurality of transmit configuration states to a transmission by the wireless device; The method includes:

2. The method of claim 1 , wherein the first parameter comprises a first index indicating the mapping relationship between the plurality of transmission configuration states and the plurality of sets of group information.

3. The method of claim 1 , wherein the one or more transmission configuration indicator code points include a transmission configuration indicator code point for a joint indication including one or more transmission configuration indicator states.

4. The method of claim 3 , wherein each transmission configuration indicator state is applicable to both downlink and uplink transmissions.

5. The method of claim 4 , wherein the single MAC control element further indicates multiple flags to indicate an association between multiple sets of group information and multiple transmission configuration indicator states.

6. 2. The method of claim 1, wherein the one or more transmission configuration indicator code points include transmission configuration indicator code points for separate indications including at least one transmission configuration indicator state.

7. The method of claim 3 , wherein each transmission configuration indicator state is applicable to downlink or uplink transmission.

8. 8. The method of claim 7, wherein the single MAC control element further indicates multiple flags to indicate an association between multiple sets of group information and multiple transmission configuration indicator states.

9. The method of claim 7, wherein the single MAC control element further indicates multiple flags to indicate an association between multiple downlink or uplink transmissions and multiple transmission configuration indicator states.

10. An apparatus for wireless communication, the apparatus comprising a processor, the processor being configured to perform a method according to any one of claims 1 to 9.

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