Method and device for supporting beam failure recovery

Abstract

Aspects of the present disclosure relate to a method and apparatus for supporting beam failure recovery (BFR). An exemplary method performed by a UE may include receiving first configuration information indicating a serving cell PCI and a plurality of additional PCIs, wherein the plurality of additional PCIs includes an activated additional PCI associated with at least one activated TCI state and one or more non-activated additional PCIs; receiving second configuration information indicating a first set of BFD-RSs associated with the serving cell PCI and a second set of BFD-RSs associated with the activated additional PCI, wherein the second set of BFD-RSs is further associated with an RS associated with at least one of the one or more non-activated additional PCIs; and performing uplink transmission based on the first configuration information and the second configuration information.

Description

Technical Field

[0001] This disclosure relates to wireless communications, and more specifically, to methods and apparatus for supporting beam failure recovery (BFR). Background Technology

[0002] A wireless communication system may include one or more network communication devices, such as base stations, that support wireless communication with one or more user communication devices, which may also be referred to as user equipment (UE) or other suitable terms. The wireless communication system may support wireless communication with one or more user communication devices by utilizing the resources of the wireless communication system (e.g., time resources (e.g., symbols, time slots, subframes, frames, etc.) or frequency resources (e.g., subcarriers, carriers, etc.)). Furthermore, the wireless communication system may support wireless communication across various radio access technologies, including third-generation (3G), fourth-generation (4G), fifth-generation (5G), and other suitable radio access technologies beyond 5G (e.g., sixth-generation (6G)). Summary of the Invention

[0003] The article “a” preceding an element is not limited and should be understood to refer to “at least one” or “one or more” of those elements. The terms “a,” “at least one,” “one or more,” and “at least one of one or more” are interchangeable. As used herein (included in the claims), the use of “or” in a list of items (e.g., a list of items beginning with phrases such as “at least one of…,” “one or more of…,” or “one or both of…”) indicates an inclusive list such that, for example, a list of at least one of A, B, or C means A or B or C or AB or AC or BC or ABC (i.e., A and B and C). Furthermore, as used herein, the phrase “based on” should not be construed as a reference to a set of closing conditions. For example, an instance step described as “based on condition A” may be based on both condition A and condition B without departing from the scope of this disclosure. In other words, as used herein, the phrase “based on” should be interpreted in the same manner as the phrase “at least partially based on.” Furthermore, as used herein (included in the claims), a “set” may contain one or more elements.

[0004] Some embodiments of the methods and apparatus described herein may further include a UE for wireless communication, comprising: at least one memory; and at least one processor coupled to the at least one memory and configured such that the UE: receives first configuration information indicating a serving cell PCI and a plurality of additional cell physical cell identifiers (PCIs), wherein the plurality of additional PCIs includes an active additional PCI associated with at least one active transmit configuration indication (TCI) state and one or more inactive additional PCIs; receives second configuration information indicating a first beam failure detection (BFD)-reference signal (RS) set associated with the serving cell PCI and a second BFD-RS set associated with the active additional PCI, wherein the second BFD-RS set is further associated with an RS associated with at least one of the one or more inactive additional PCIs; and performs uplink (UL) transmission based on the first configuration information and the second configuration information.

[0005] In some embodiments of the methods and apparatus described herein, the second BFD-RS set is associated with a new beam indicator (NBI)-RS set that includes at least one of the RSs associated with at least one of the one or more inactive additional PCIs.

[0006] In some implementations of the methods and apparatus described herein, the maximum number of RSs associated with an inactive additional PCI in the NBI-RS set, or the maximum number of inactive additional PCIs associated with the NBI-RS set, depends on the capabilities of the UE.

[0007] In some embodiments of the methods and apparatus described herein, the at least one processor is configured to cause the UE to: report a new beam in a Medium Access Control (MAC) control element (CE) when the second BFD-RS set is detected as a beam failure and there is at least one RS in the NBI-RS set whose Layer (L)1-Reference Signal Received Power (RSRP) is greater than or equal to the beam failure recovery threshold; or report an indicator indicating that no new beam was reported in the MAC CE when the second BFD-RS set is detected as a beam failure and the L1-RSRP of all RSs in the NBI-RS set is less than the beam failure recovery threshold.

[0008] In some embodiments of the methods and apparatus described herein, the second BFD-RS set is associated with a second NBI-RS set containing RSs associated with the serving cell PCI, RSs associated with the activated additional PCI, or combinations thereof, and a third NBI-RS set containing RSs associated with at least one of the one or more inactive additional PCIs.

[0009] In some implementations of the methods and apparatus described herein, the maximum number of RSs associated with an inactive additional PCI in the third NBI-RS set, or the maximum number of inactive additional PCIs associated with the third NBI-RS set, depends on the capabilities of the UE.

[0010] In some embodiments of the methods and apparatus described herein, the first BFD-RS set is associated with a first NBI-RS set, and the maximum number of RSs in the first NBI-RS set, the second NBI-RS set, and the third NBI-RS set is the same.

[0011] In some embodiments of the methods and apparatus described herein, the at least one processor is configured such that the UE measures the RSs in the third NBI-RS set when the second BFD-RS set is detected as a beam failure and the L1-RSRP of all RSs in the second NBI-RS set is less than the beam failure recovery threshold.

[0012] In some embodiments of the methods and apparatus described herein, the at least one processor is configured to cause the UE to: report a new beam in the MAC CE, wherein the new beam is one of the at least one RS whose L1-RSRP is greater than or equal to the beam failure recovery threshold, in the case that there is at least one RS in the third NBI-RS set whose L1-RSRP is greater than or equal to the beam failure recovery threshold; or report an indicator in the MAC CE indicating that a new beam has not been reported, in the case that the L1-RSRP of all RSs in the third NBI-RS set is less than the beam failure recovery threshold.

[0013] In some embodiments of the methods and apparatus described herein, the at least one processor is configured to cause the UE to: report in a field of the MAC CE an indicator indicating which NBI-RS set the new beam originates from, in the case that the UE reports a new beam as an RS from the second NBI-RS set or the third NBI-RS set in the MAC CE.

[0014] In some embodiments of the methods and apparatus described herein, when the field corresponds to a serving cell, the indicator in the field is valid, the field indicating beam failure detection is set to 1 for the serving cell, and two BFD-RS sets are configured, one of which is associated with the activated additional PCI.

[0015] In some embodiments of the methods and apparatus described herein, the at least one processor is configured to enable the UE to receive Radio Resource Control (RRC) reconfiguration or MAC CE updates for updating a third NBI-RS set.

[0016] In some embodiments of the methods and apparatus described herein, wherein, in the case that an RS associated with at least one of the one or more inactive additional PCIs is reported as a new beam associated with the second BFD-RS set, the at least one processor is configured to cause the UE to: after applying the new beam in the UE, update the activated additional PCI to a new activated additional PCI, wherein the new activated additional PCI is the additional PCI associated with the RS reported as the new beam.

[0017] In some embodiments of the methods and apparatus described herein, the at least one processor is configured to exclude the UE from all RSs associated with the new activated additional PCI from the RS associated with at least one of the one or more inactive additional PCIs.

[0018] In some embodiments of the methods and apparatus described herein, the at least one processor is configured such that the UE considers an RS in ssb-PositionsInBurst, which is indicated by parameters as being associated with the newly activated additional PCI, as an RS associated with the new activated additional PCI, before the MAC CE activates the TCI state of the transmit-receive point (TRP) associated with the second BFD-RS set.

[0019] In some embodiments of the methods and apparatus described herein, the at least one processor is configured to cause the UE to perform the UL transmission or downlink (DL) transmission according to one or more of the following: any RS indicated by the parameter as ssb-PositionsInBurst in the SSB-MTC-AdditionalPCI associated with the new activated additional PCI is considered an invalid symbol of Physical Uplink Shared Channel (PUSCH) repetition type B; the uplink transmission is discarded if it overlaps in the time domain with any RS indicated by the parameter as ssb-PositionsInBurst in the SSB-MTC-AdditionalPCI associated with the new activated additional PCI; and ssb-PositionsInBurst in the SSB-MTC-AdditionalPCI associated with the new activated additional PCI. The symbols of the RS in onsInBurst are not expected to be indicated as uplink symbols by downlink control information (DCI) format 2_0; the symbols of the RS in ssb-PositionsInBurst in the SSB-MTC-Additional PCI associated with the new activated additional PCI are not expected to be indicated as uplink by time division duplex (TDD)-UL-DL general configuration or TDD-UL-DL dedicated configuration; and in the case where the beam of the physical downlink control channel (PDCCH) is updated to a new beam and at least one resource element (RE) of the PDCCH candidate overlaps with at least one RE of the candidate RS corresponding to the RS index provided by ssb-PositionsInBurst in the SSB-MTC-Additional PCI associated with the new activated additional PCI, the UE is not required to monitor the PDCCH candidate.

[0020] In some embodiments of the methods and apparatus described herein, the at least one processor is configured to cause the UE to perform the uplink transmission according to one or more of the following: any RS associated with at least one of the one or more inactive additional PCIs is considered an invalid symbol of PUSCH repetition type B; the uplink transmission is dropped if the uplink transmission overlaps in the time domain with RS associated with at least one of the one or more inactive additional PCIs; the symbol of the RS associated with at least one of the one or more inactive additional PCIs is not expected to be indicated as an uplink symbol by DCI format 2_0; and the symbol of the RS associated with at least one of the one or more inactive additional PCIs is not expected to be indicated as an uplink symbol by TDD-UL-DL general configuration or TDD-UL-DL specific configuration.

[0021] In some embodiments of the methods and apparatus described herein, the RS associated with at least one of the one or more inactive additional PCIs is a Channel State Information (CSI) RS or a Synchronization Signal (SS) / Physical Broadcast Channel (PBCH) Block (SSB).

[0022] In some embodiments of the methods and apparatus described herein, the RS associated with at least one of the one or more inactive additional PCIs is an SSB, and the at least one processor is configured to cause the UE to perform the uplink transmission according to the following: the determination of time slots for repeated Physical Pink Control Channel (PUCCH) transmissions with unpaired spectrum excludes flexible symbols as SSB symbols, starting from the first symbol provided by the start symbol index, and is equal to or greater than the number of symbols of the RS associated with at least one of the one or more inactive additional PCIs.

[0023] In some embodiments of the methods and apparatus described herein, the new beam is applied in the UE after several symbols following the last symbol received from a PDCCH in DCI format that has a PUSCH transmission having the same Hybrid Automatic Repeat Request (HARQ) procedure number as the first PUSCH transmission carrying an indication of the new beam and having a Switching Network Device Interface (NDI) field value.

[0024] Some embodiments of the methods and apparatus described herein may further include a processor for wireless communication, comprising: at least one controller coupled to at least one memory and configured such that the processor: receives first configuration information indicating a serving cell PCI and a plurality of additional PCIs, wherein the plurality of additional PCIs includes an active additional PCI associated with at least one active TCI state and one or more inactive additional PCIs; receives second configuration information indicating a first BFD-RS set associated with the serving cell PCI and a second BFD-RS set associated with the active additional PCI, wherein the second BFD-RS set is further associated with an RS associated with at least one of the one or more inactive additional PCIs; and performs uplink transmission based on the first configuration information and the second configuration information.

[0025] Some embodiments of the methods and apparatus described herein may further include a network equipment (NE) for wireless communication, which may include: at least one memory; and at least one processor coupled to the at least one memory and configured such that the NE: transmits first configuration information indicating a serving cell PCI and a plurality of additional PCIs, wherein the plurality of additional PCIs includes an active additional PCI associated with at least one active TCI state and one or more inactive additional PCIs; transmits second configuration information indicating a first BFD-RS set associated with the serving cell PCI and a second BFD-RS set associated with the active additional PCI, wherein the second BFD-RS set is further associated with an RS associated with at least one of the one or more inactive additional PCIs; and performs uplink reception based on the first configuration information and the second configuration information.

[0026] Some embodiments of the methods and devices described herein may further include a method performed by a UE, comprising: receiving first configuration information indicating a serving cell PCI and a plurality of additional PCIs, wherein the plurality of additional PCIs includes an activated additional PCI associated with at least one activated TCI state and one or more inactive additional PCIs; receiving second configuration information indicating a first BFD-RS set associated with the serving cell PCI and a second BFD-RS set associated with the activated additional PCI, wherein the second BFD-RS set is further associated with an RS associated with at least one of the one or more inactive additional PCIs; and performing an uplink transmission based on the first configuration information and the second configuration information. Attached Figure Description

[0027] Figure 1 Examples of wireless communication systems according to aspects of this disclosure are described.

[0028] Figure 2 This is an example of BFR MAC CE based on aspects of this disclosure.

[0029] Figure 3 This is another example of BFR MAC CE according to aspects of this disclosure.

[0030] Figure 4 Examples of UEs based on aspects of this disclosure are described.

[0031] Figure 5 Examples of processors according to aspects of this disclosure are described.

[0032] Figure 6 Examples of NEs based on aspects of this disclosure are described.

[0033] Figure 7 A flowchart illustrating a method performed by a UE according to aspects of this disclosure.

[0034] Figure 8 A flowchart illustrating the method performed by NE according to aspects of this disclosure. Detailed Implementation

[0035] Beam management is a crucial aspect of Multiple-Input Multiple-Output (MIMO) in New Radio (NR). A "beam" can be represented or associated with spatial relationship information, TCI status, or RS, etc. In 3GPP Release 15, a Beam Failure Recovery (BFR) based on the Random Access Channel (RACH) is defined for the primary cell (PCell); and in Rel-16, a BFR based on MAC CE with Physical Uplink Control Channel Scheduling Request (PUCCH-SR) is defined for the secondary cell (SCell). However, both PCell and SCell BFRs are defined only for a single TRP transmission. For multiple TRP transmissions, beam failure recovery can be performed separately for each TRP; that is, a TRP-specific BFR, negotiated to be supported in Rel-17 and designed based on the Rel-16 SCell BFR scheme. In the exemplary TRP-specific BFR, two failure detection resource sets (also referred to as two BFD-RS sets) are configured in the cell, each associated with a TRP. Additionally, the two candidate resource sets (which may also be referred to as NBI-RS sets) are configured in a one-to-one manner with the two failure detection resource sets, wherein each candidate resource set is associated with a corresponding failure detection resource set. Each resource (e.g., the failure detection resource set and the RS in the candidate resource set) represents the corresponding beam.

[0036] Additionally, according to traditional specifications, if M-TRP operation based on inter-cell multiple DCI (M-DCI) is applied, then one TRP is associated with the serving cell PCI, and another TRP is associated with an activated additional PCI, wherein at least one activated TRP state is associated with an activated additional PCI, and the number of activated additional PCIs is 1. Furthermore, only the SSB associated with the activated additional PCI can be configured in the NBI-RS set associated with the activated additional PCI. If the BFD-RS set associated with the activated additional PCI is detected as beam failure, then only one of the SSBs associated with the activated additional PCI (excluding the deactivated additional PCI (or inactive additional PCI)) or the RS associated with the serving cell PCI can be selected as the new beam.

[0037] However, if the UE moves to the coverage area of ​​another additional PCI besides the activated additional PCI, a new beam cannot be found. In this case, the network side (e.g., gNB) can trigger a beam report, where at least one SSB associated with the other additional PCI besides the activated additional PCI is configured as an RS for channel measurement. The SSB associated with the other additional PCI can be reported, causing the gNB to switch the activated additional PCI to the new activated additional PCI by activating the MAC CE based on the beam report by updating the TCI state where at least one TCI state associated with the new activated additional PCI exists, and indicating the TCI state associated with the new activated additional PCI via DCI. It can be seen that in conventional technology, in M-TRP operation based on inter-cell M-DCI, there is a significant delay in the switching of the activated additional PCI.

[0038] In view of at least the above-mentioned technical problems, this disclosure provides a technical solution to support beam failure recovery, such as a method and apparatus to support beam failure recovery. In this disclosure, consideration is given to how to quickly switch to the new activated additional PCI based on TRP-specific BFR and UE behavior after switching to the new activated additional PCI.

[0039] For example, in some embodiments of this application, for a TRP-specific BFR, RS (e.g., CSI-RS or SSB associated with an inactive additional PCI) can be configured in an NBI-RS set that is associated one-to-one with a set of BFD-RS associated with an activated additional PCI, wherein an RS associated with an inactive additional PCI can be selected from the NBI-RS set associated with a set of BFD-RS associated with an activated additional PCI and reported as a new beam.

[0040] In some other embodiments of this application, for a TRP-specific BFR, the BFD-RS set associated with the activated additional PCI is associated with two NBI-RS sets, wherein one NBI-RS set is configured to include only RSs associated with the serving cell PCI and / or the activated additional PCI; and the other NBI-RS set (or referred to as the additional NBI-RS set in contrast to the conventional single NBI-RS set) is configured to include RSs associated with the inactive additional PCI. RSs in the additional NBI-RS set are measured only if the following two conditions are met: the BFD-RS set associated with the activated additional PCI is detected as a beam failure; and no new beam is found in the NBI-RS set associated with the BFD-RS set configured to include only RSs associated with the serving cell PCI and / or the activated additional PCI (e.g., the L1-RSRP of all RSs in the NBI-RS set is less than a threshold configured for the TRP-specific BFR, e.g., the threshold specified in 3GPP TS 38.133 (Q...). in,LR )).

[0041] In short, at least one aspect of this disclosure proposes an enhanced TRP-specific BFR, for example, for an inter-cell M-DCI-based M-TRP, which reduces the latency of switching the activated additional PCI.

[0042] The aspects of this disclosure are described in the context of wireless communication systems.

[0043] Figure 1 This describes an example of a wireless communication system 100 according to aspects of this disclosure. The wireless communication system 100 may include one or more NEs 102, one or more UEs 104, and a core network (CN) 106. The wireless communication system 100 may support various radio access technologies. In some embodiments, the wireless communication system 100 may be a 4G network, such as an LTE network or an LTE-Advanced (LTE-A) network. In some other embodiments, the wireless communication system 100 may be an NR network, such as a 5G network, a 5G-Advanced (5G-A) network, or a 5G Ultra Wideband (5G-UWB) network. In other embodiments, the wireless communication system 100 may be a combination of a 4G network and a 5G network or other suitable radio access technologies, including IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), and IEEE 802.20. The wireless communication system 100 may support radio access technologies beyond 5G, such as 6G. In addition, the wireless communication system 100 can support technologies such as Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), or Code Division Multiple Access (CDMA).

[0044] One or more NEs 102 may be distributed throughout a geographic area to form a wireless communication system 100. One or more of the NEs 102 described herein may be, include, or be referred to as a network node, base station, network element, network function, network entity, radio access network (RAN), NodeB, eNodeB (eNB), next-generation NodeB (gNB), or other suitable terms. NEs 102 and UE 104 may communicate via a communication link, which may be a wireless or wired connection. For example, NEs 102 and UE 104 may perform wireless communication (e.g., receive signaling, transmit signaling) via a Uu interface.

[0045] NE 102 can provide a geographic coverage area for which NE 102 can support services for one or more UEs 104 within the geographic coverage area. For example, NE 102 and UE 104 can support wireless communication of signals associated with services (e.g., voice, video, packet data, messaging, broadcasting, etc.) according to one or more radio access technologies. In some embodiments, NE 102 can be mobile, for example, a satellite associated with a non-terrestrial network (NTN). In some embodiments, different geographic coverage areas 112 associated with the same or different radio access technologies can overlap, but different geographic coverage areas can be associated with different NEs 102.

[0046] One or more UEs 104 may be distributed throughout the geographic area of ​​the wireless communication system 100. UE 104 may include or be referred to as a remote unit, mobile device, wireless device, remote device, subscriber device, transmitter device, receiver device, or some other suitable term. In some embodiments, UE 104 may be referred to as a unit, station, terminal, or client, and other instances thereof. Additionally or alternatively, UE 104 may be referred to as an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or a Machine Type Communication (MTC) device, and other instances thereof.

[0047] UE 104 may be able to support direct wireless communication with other UE 104 via a communication link. For example, UE 104 may support direct wireless communication with another UE 104 via a device-to-device (D2D) communication link. In some implementations, such as vehicle-to-vehicle (V2V) deployments, vehicle-to-everything (V2X) deployments, or cellular-V2X deployments, communication link 114 may be referred to as a side link. For example, UE 104 may support direct wireless communication with another UE 104 via a PC5 interface.

[0048] NE 102 may support communication with CN 106 or with another NE 102 or both. For example, NE 102 may interface with other NE 102 or CN 106 via one or more backhaul links (e.g., S1, N2, N2, or network interfaces). In some embodiments, NE 102 may communicate directly with each other. In some other embodiments, NE 102 may communicate with each other or indirectly (e.g., via CN 106). In some embodiments, one or more NE 102 may include sub-components, such as access network entities, which may be instances of Access Node Controllers (ANCs). The ANC may communicate with one or more UE 104s via one or more other access network transmitting entities (which may be referred to as radio headends, smart radio headends, or transmit-receive points (TRPs)).

[0049] CN 106 can support user authentication, access authorization, tracking, connectivity, and other access, routing, or mobility functions. CN106 can be an evolved packet core (EPC) or a 5G core (5GC), which may include control plane entities that manage access and mobility (e.g., a mobility management entity (MME), access and mobility management functions (AMF)) and user plane entities that route packets or interconnects to external networks (e.g., a serving gateway (S-GW), a packet data network (PDN) gateway (P-GW), or a user plane function (UPF)). In some implementations, the control plane entities may manage non-access stratum (NAS) functions, such as mobility, authentication, and bearer management (e.g., data bearers, signaling bearers, etc.) of one or more UEs 104 served by one or more NEs 102 associated with CN106.

[0050] CN 106 can communicate with the packet data network via one or more backhaul links (e.g., via S1, N2, N2, or another network interface). The packet data network may contain an application server. In some implementations, one or more UEs 104 can communicate with the application server. UE 104 can establish a session (e.g., a Protocol Data Unit (PDU) session, etc.) with CN 106 via NE 102. CN 106 can use the established session (e.g., an established PDU session) to route services (e.g., control information, data, etc.) between UE 104 and the application server. A PDU session may be an instance of a logical connection between UE 104 and CN 106 (e.g., one or more network functions of CN 106).

[0051] In the wireless communication system 100, NE 102 and UE 104 can use the resources of the wireless communication system 100 (e.g., time resources (e.g., symbols, time slots, subframes, frames, etc.) or frequency resources (e.g., subcarriers, carriers)) to perform various operations (e.g., wireless communication). In some embodiments, NE 102 and UE 104 may support different resource structures. For example, NE 102 and UE 104 may support different frame structures. In some embodiments, such as in 4G, NE 102 and UE 104 may support a single frame structure. In some other embodiments, such as in 5G and other suitable radio access technologies, NE 102 and UE 104 may support various frame structures (i.e., multiple frame structures). NE 102 and UE 104 may support various frame structures based on one or more parameter sets.

[0052] The wireless communication system 100 may support one or more parameter sets, and the parameter sets may include subcarrier spacing and cyclic prefixes. The first parameter set (e.g., =0) can be associated with the first subcarrier spacing (e.g., 15 kHz) and the normal cyclic prefix. In some embodiments, the first parameter set (e.g., ...) associated with the first subcarrier spacing (e.g., 15 kHz) is... =0) allows each subframe to utilize one time slot. The second parameter set (e.g., =1) can be associated with the second subcarrier spacing (e.g., 30 kHz) and the normal cyclic prefix. The third parameter set (e.g., =2) can be associated with the third subcarrier spacing (e.g., 60 kHz) and the normal cyclic prefix or extended cyclic prefix. The fourth parameter set (e.g., =3) can be associated with the fourth subcarrier spacing (e.g., 120 kHz) and the normal cyclic prefix. The fifth parameter set (e.g., =4) can be associated with the fifth subcarrier spacing (e.g., 240 kHz) and the normal cyclic prefix.

[0053] Time intervals for resources (e.g., communication resources) can be organized according to frames (also called radio frames). Each frame may have a duration, for example, 10 milliseconds (ms). In some embodiments, each frame may contain multiple subframes. For example, each frame may contain 10 subframes, and each subframe may have a duration, for example, 1 ms. In some embodiments, each frame may have the same duration. In some embodiments, each subframe of a frame may have the same duration.

[0054] Alternatively, the time intervals of resources (e.g., communication resources) can be organized according to time slots. For example, a subframe may contain a certain number of time slots. The number of time slots in each subframe may also depend on one or more sets of parameters supported in the wireless communication system 100. For example, the first, second, third, fourth, and fifth sets of parameters associated with the corresponding subcarrier intervals of 15 kHz, 30 kHz, 60 kHz, 120 kHz, and 240 kHz (i.e., =0、 =1、 =2、 =3、 =4) Each subframe can utilize a single time slot, two time slots, four time slots, eight time slots, or 16 time slots per subframe, respectively. Each time slot can contain a certain number of symbols (e.g., OFDM symbols). In some implementations, the number of time slots in a subframe (e.g., the number of symbols) can depend on the parameter set. For a normal cyclic prefix, a time slot can contain 14 symbols. For an extended cyclic prefix (e.g., for a 60 kHz subcarrier spacing), a time slot can contain 12 symbols. The relationship between the number of symbols per time slot for the normal and extended cyclic prefixes, the number of time slots per subframe, and the number of time slots per frame can depend on the parameter set. It should be understood that for a first parameter set (e.g., the number of symbols per time slot for the first subcarrier spacing (e.g., 15 kHz), the number of symbols per time slot for the first subcarrier spacing (e.g., the number of symbols per time slot for the first subcarrier spacing (e.g., 15 kHz)) is different. The reference of =0 can be used interchangeably between subframes and time slots.

[0055] In the wireless communication system 100, the electromagnetic (EM) spectrum can be divided into various categories, bands, channels, etc., based on frequency or wavelength. For example, the wireless communication system 100 may support one or more operating frequency bands, such as frequency ranges specified as FR1 (410 MHz to 7.125 GHz), FR2 (24.25 GHz to 52.6 GHz), FR3 (7.125 GHz to 24.25 GHz), FR4 (52.6 GHz to 114.25 GHz), FR4a or FR4-1 (52.6 GHz to 71 GHz), and FR5 (114.25 GHz to 300 GHz). In some embodiments, NE 102 and UE 104 may perform wireless communication on one or more of the operating frequency bands. In some embodiments, FR1 may be used by NE 102 and UE 104, as well as other equipment or devices, for cellular communication services (e.g., control information, data). In some implementations, FR2 can be used by NE 102 and UE 104, as well as other equipment or devices, for short-range, high-data-rate capabilities.

[0056] FR1 can be associated with one or more parameter sets (e.g., at least three parameter sets). For example, FR1 can be associated with a first parameter set containing a 15 kHz subcarrier spacing (e.g., =0); a second set of parameters containing a 30 kHz subcarrier spacing (e.g., =1); and a third set of parameters including a 60 kHz subcarrier spacing (e.g., =2) can be associated with FR2. FR2 can be associated with one or more parameter sets (e.g., at least two parameter sets). For example, FR2 can be associated with a third parameter set containing a 60 kHz subcarrier spacing (e.g., =2); and a fourth set of parameters including a 120 kHz subcarrier spacing (e.g., =3) Related.

[0057] In M-TRP scenarios (or operations) based on M-DCI, multiple TRPs are configured in the activated BWP of the serving cell, for example, two TRPs. For example, there may be multiple control resource set (CORESET) pool index values ​​configured by RRC, and each CORESET pool index value represents a TRP. On the other hand, based on a unified TCI state framework, each of multiple MAC CEs will activate one or more TCI states for M-TRP operations based on M-DCI, for example, two MAC CEs for two TRPs. Regarding TCI states, they can be joint TCI states under a unified TCI state framework, DL TCI states, or UL TCI states. The indicated TCI state among all activated TCI states is the applicable TCI state indicated from a time example, and it can also be referred to as the applicable TCI state. Other TCI states among all activated TCI states besides the indicated TCI state are unindicated TCI states.

[0058] In addition, in M-TRP operations based on inter-cell M-DCI, besides the serving cell PCI, multiple additional PCIs will be configured for the UE, for example, via RRC. Taking two TRPs as an example, only one of the configured additional PCIs is activated. This means that the activated additional PCI is associated with at least one activated TCI state, and all other additional PCIs besides the activated one are inactive (or deactivated). Similarly, in the case of more than two TRPs, more additional PCIs can be activated, wherein each activated additional PCI associated with at least one activated TCI state is associated one-to-one with its corresponding TRP.

[0059] In the case of configuring a TRP-specific BFR for an M-TRP based on inter-cell M-DCI, for example, multiple BFD-RS sets will be configured for multiple TRPs, where each BFD-RS set is associated one-to-one with a TRP, for example, with a configured CORESET pool index value. Since a BFD-RS set associated with a TRP is associated with an indicated joint or DL ​​TCI state associated with that TRP, a BFD-RS set is associated with an activated additional PCI if the indicated TCI state associated with the BFD-RS set is associated with an activated additional PCI.

[0060] Using two TRPs as an example, two BFD-RS sets will be configured based on the TRP-specific BFR settings. One of the two BFD-RS sets will be associated with a TRP related to the serving cell PCI, and the other will be associated with another TRP related to an activated additional PCI. The same applies when there are more than two TRPs.

[0061] Furthermore, in the case of configuring a TRP-specific BFR for an M-TRP based on inter-cell M-DCI, for example, multiple NBI-RS sets will be configured associated with multiple BFD-RS sets. For example, in the case of two TRPs, at least two NBI-RS sets (e.g., two or three NBI-RS sets) will be configured based on the TRP-specific BFR, wherein one of the at least two NBI-RS sets is associated with a BFD-RS set associated with the serving cell PCI, for example, the same or similar to that specified in the traditional 3GPP specification, and the others of the at least two NBI-RS sets are associated with a BFD-RS set associated with an activated additional PCI. The same applies when there are more than two TRPs.

[0062] The NBI-RS set associated with the BFD-RS set associated with the activated additional PCI is configured in a different manner than conventionally. In conventional 3GPP specifications, only RSs (e.g., SSBs associated with an activated additional PCI associated with at least one activated TCI state) can be configured in an NBI-RS set associated one-to-one with the BFD-RS set associated with the activated additional PCI. However, according to some aspects of this disclosure, RSs associated with inactive additional PCIs can be configured in an NBI-RS set associated with the BFD-RS set associated with the activated additional PCI. That is, the BFD-RS set associated with the activated additional PCI will be associated with RSs associated with inactive additional PCIs. Exemplary RSs associated with inactive additional PCIs are CSI-RS or SSBs, etc. The inactive additional PCIs associated with the RSs in the NBI-RS set associated with the BFD-RS set associated with the activated additional PCI are one or more of the configured inactive additional PCIs.

[0063] RSs associated with inactive additional PCIs configured for the BFD-RS set associated with the activated additional PCI will affect uplink transmission (or uplink reception). For example, when performing uplink transmission in the UE or uplink reception on the network side, the following factors will be considered: any RS associated with an inactive additional PCI configured for the BFD-RS set associated with the activated additional PCI is considered an invalid symbol of PUSCH repetition type B; uplink transmission will be dropped if it overlaps in the time domain with an RS associated with an inactive additional PCI configured for the BFD-RS set associated with the activated additional PCI; symbols associated with RSs associated with inactive additional PCIs configured for the BFD-RS set associated with the activated additional PCI are not expected to be indicated as uplink symbols by DCI format 2_0; and symbols associated with RSs associated with inactive additional PCIs are not expected to be indicated as uplink symbols by TDD-UL-DL general configuration or TDD-UL-DL specific configuration.

[0064] Furthermore, the impact on uplink transmission (and uplink reception) also involves the determination of time slots for repetitive PUCCH transmissions with unpaired spectrum. For example, if the RS associated with an inactive additional PCI configured in the NBI-RS set associated with the BFD-RS set and the activated additional PCI is an SSB, the determination of time slots for repetitive PUCCH transmissions with unpaired spectrum will exclude flexible symbols as SSB symbols, starting from the first symbol provided by the start symbol index, and equal to or greater than the number of symbols of the RS associated with the inactive additional PCI.

[0065] Because RSs associated with inactive additional PCIs in the NBI-RS set will affect uplink transmission, there are limitations on the maximum number of RSs associated with inactive additional PCIs in the NBI-RS set or the maximum number of inactive additional PCIs associated with the NBI-RS set. For example, an NBI-RS set associated with a BFD-RS set associated with an activated additional PCI must contain at least RSs associated with inactive additional PCIs, and the maximum number of RSs associated with inactive additional PCIs in the NBI-RS set or the maximum number of inactive additional PCIs associated with the NBI-RS set depends on the UE's capabilities.

[0066] The following details two exemplary configurations of the NBI-RS set associated with the BFD-RS set associated with the activated additional PCI. For simplicity and clarity, the BFD-RS set associated with the serving cell may also be referred to as the first BFD-RS set, and the BFD-RS set associated with the activated additional PCI may also be referred to as the second BFD-RS set.

[0067] In some embodiments of this disclosure (Symbol 1), similar to the conventional approach, BFD-RS sets and NBI-RS sets are associated one-to-one. That is, an NBI-RS set is associated with a BFD-RS set associated with an activated additional PCI; for example, a second NBI-RS set is associated with a second BFD-RS set associated with an activated additional PCI. An exemplary NBI-RS set associated with the second BFD-RS set may include a combination of RSs associated with the serving cell PCI and RSs associated with an inactive additional PCI, or a combination of RSs associated with the activated additional PCI and RSs associated with an inactive additional PCI, or only RSs associated with an inactive additional PCI, or a combination of RSs associated with the serving cell PCI, RSs associated with the activated additional PCI, and RSs associated with an inactive additional PCI.

[0068] In some embodiments of this disclosure, it is assumed that the RS associated with the inactive additional PCI is an SSB. Then, the SSB associated with the inactive additional PCI configured in the NBI-RS set associated with the second BFD-RS set will affect uplink transmission as follows:

[0069] Any SSB associated with any unactivated additional PCI in the NBI-RS set is considered an invalid symbol of PUSCH repeat type B;

[0070] If an uplink transmission overlaps in the time domain with an SSB associated with any inactive additional PCI in the NBI-RS set, then the uplink transmission is dropped.

[0071] Symbols of SSBs associated with any unactivated additional PCI in the NBI-RS set are not expected to be indicated as uplink symbols by DCI format 2_0;

[0072] SSB symbols associated with any inactive additional PCI in the NBI-RS set are not expected to be designated as uplink symbols by tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated; and

[0073] Consider any SSBs associated with any unactivated additional PCI in the NBI-RS set to determine the time slots for repeating PUCCH transmissions with unpaired spectrum.

[0074] The following demonstrates an exemplary determination of time slots for repetitive PUCCH transmissions with unpaired spectrum, based on the traditional 3GPP specification TS38.213, taking into account the impact of SSBs associated with any unactivated additional PCIs from the NBI-RS set:

[0075] The SSB symbol is the symbol for the SS / PBCH block, where the candidate SS / PBCH block index corresponds to ssb-PositionsInBurst in SIB1 or ssb-PositionsInBurst in ServingCellConfigCommon or NonCellDefiningSSB. (If provided), or if the UE is not provided with dl-OrJoint-TCIStateList, then the SS / PBCH block index indicated to the UE by ssb-PositionsInBurst in the SSB-MTCAdditionalPCI associated with a physical cell ID having an active TCI state, wherein the active TCI state is a set of symbols for a PDCCH or PDSCH or for a time slot corresponding to an SS / PBCH block configured for L1 beam measurement / reporting, or for a time slot configured in an NBI-RS set corresponding to an SS / PBCH block associated with any physical cell ID configured in the SSB-MTCAdditionalPCI and not associated with an active TCI state of the PDCCH or PDSCH configured in the candidateBeamRSList.

[0076] For unpaired spectrum, the UE determines the spectrum used for PUCCH transmission. Each time slot begins with a time slot indicated to the UE for HARQ-ACK reporting as described in Clause 9.2.3, or with a time slot determined for SR reporting as described in Clause 9.2.4 or for CSI reporting as described in Clause 5.2.1.4 of [6, TS 38.214], and has

[0077] - UL symbols as described in Clause 11.1, or flexible symbols that are not provided by startingSymbolIndex as the first symbol for the SS / PBCH block, and

[0078] - For consecutive UL symbols as described in Clause 11.1, or flexible symbols that are not SS / PBCH block symbols, starting from the first symbol, the number of symbols provided by nrofsymbols shall be equal to or greater than the number of symbols provided by nrofsymbols.

[0079] Similar to traditional TRP-specific BFRs, when the associated BFD-RS set is detected as a beam failure, the UE will report a new beam in the BFR MAC CE if at least one RS in the NBI-RS set has an L1-RSRP greater than or equal to the BFR threshold. This new beam is an RS among at least one RS whose L1-RSRP is greater than or equal to the BFR threshold. The RS reported as a new beam is either associated with or not associated with an inactive additional PCI. All RSs in the NBI-RS set have L1-RSRPs less than the BFR threshold (e.g., Q-band configurations as specified in traditional 3GPP specifications for TRP-specific BFRs). in,LR In the event of this, the UE will report an indicator indicating that no new beam has been reported in the BFR MAC CE.

[0080] In some other embodiments of this disclosure (Scheme 2), for a TRP-specific BFD-RS set (e.g., a second BFD-RS set) associated with an activated additional PCI, it will be associated with two NBI-RS sets. For example, in addition to the NBI-RS set configured similarly to the conventional BFD-RS set associated with the activated additional PCI (or referred to as the second NBI-RS set in Scheme 2), an additional NBI-RS set (or referred to as the third NBI-RS set in Scheme 2) is configured for the BFD-RS set associated with the activated additional PCI. Taking two TRPs as an example, for a TRP-specific BFR, for example, in an inter-cell M-DCI M-TRP operation, in addition to the first NBI-RS set associated with the first BFD-RS set associated with the serving cell PCI and the second NBI-RS set associated with the second BFD-RS set associated with the activated additional PCI (e.g., by q), 1,0 and q 1,1 In addition to (represented as traditional), a third NBI-RS set (e.g., by q) will also be configured. 1,2 (This indicates that) the third NBI-RS set is also associated with the second BFD-RS set. For example, the additional or third NBI-RS set can be updated via RRC reconfiguration or MAC CE update from the network side.

[0081] The exemplary second NBI-RS set includes RSs associated with the serving cell PCI, RSs associated with activated additional PCIs, or combinations thereof. The exemplary third NBI-RS set includes RSs associated with inactive additional PCIs.

[0082] Similarly, in some embodiments of this disclosure, it is assumed that the RS associated with an inactive additional PCI is an SSB. Then, the SSB associated with an inactive additional PCI configured in the additional NBI-RS set will affect uplink transmission as follows:

[0083] Any SSB in the additional NBI-RS set is considered an invalid symbol of PUSCH repeating type B;

[0084] If an uplink transmission overlaps with any SSB in the additional NBI-RS set in the time domain, then the uplink transmission is dropped.

[0085] SSB symbols in the additional NBI-RS set are not expected to be indicated as uplink symbols by DCI format 2_0;

[0086] Symbols for SSBs in the additional NBI-RS set are not expected to be designated as uplink symbols by tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated; and

[0087] Consider any SSBs in the additional NBI-RS set to determine the time slots for repetitive PUCCH transmissions with unpaired spectrum.

[0088] The following demonstrates an exemplary determination of time slots for repetitive PUCCH transmissions with unpaired spectrum, based on the traditional 3GPP specification TS38.213, taking into account the impact of SSBs associated with any inactive additional PCIs from the additional NBI-RS set:

[0089] SS / PBCH block symbols are symbols for SS / PBCH blocks, where the candidate SS / PBCH block index corresponds to the SS / PBCH block index indicated to the UE by ssb-PositionsInBurst in SIB1 or ssb-PositionsInBurst in ServingCellConfigCommon or by NonCellDefiningSSB (if provided), or by ssb-PositionsInBurst in SSB-MTCAdditionalPCI associated with the physical cell ID with an active TCI state if the UE is not provided with dl-OrJoint-TCIStateList, where the active TCI state is a set of symbols for a PDCCH or PDSCH or for a time slot corresponding to an SS / PBCH block configured for L1 beam measurement / reporting, or for a time slot corresponding to an SS / PBCH block configured in the additional candidateBeamRSList.

[0090] For unpaired spectrum, the UE determines the spectrum used for PUCCH transmission. Each time slot begins with a time slot indicated to the UE for HARQ-ACK reporting as described in Clause 9.2.3, or with a time slot determined for SR reporting as described in Clause 9.2.4 or for CSI reporting as described in Clause 5.2.1.4 of [6, TS 38.214], and has

[0091] - UL symbols as described in Clause 11.1, or flexible symbols that are not provided by startingSymbolIndex as the first symbol for the SS / PBCH block, and

[0092] - For consecutive UL symbols as described in Clause 11.1, or flexible symbols that are not SS / PBCH block symbols, starting from the first symbol, the number of symbols provided by nrofsymbols shall be equal to or greater than the number of symbols provided by nrofsymbols.

[0093] A beam failure is detected in the BFD-RS set associated with the activated additional PCI (also known as the failed BFD-RS set), and no new beam can be found in the second NBI-RS set configured for the BFD-RS set associated with the activated additional PCI (e.g., the L1-RSRP of all RSs in the second NBI-RS set is less than the threshold configured for the BFR specific to the TRP (e.g., Q). in,LR In the event of a condition where the L1-RSRP is greater than or equal to the BFR threshold (e.g., Q from the additional NBI-RS set), a measurement of the RS will be triggered. in,LR If at least one RS is selected from at least one RS, then the new beam of the SSB associated with the inactive additional PCI selected from at least one RS will be reported in the BFR MAC CE of the BFR specific to the TRP. If the new beam cannot be found in the additional NBI-RS set, for example, if the L1-RSRP of all RSs in the additional NBI-RS set is less than a threshold, then the UE will transmit an indicator to the network side (e.g., to the gNB) indicating that the new beam has not been reported in the BFR MAC CE.

[0094] Since the new beam corresponding to the set of failed BFD-RS associated with the activated additional PCI in the BFR specific to the TRP can be selected from either the second NBI-RS set associated with the failed BFD-RS set or the third NBI-RS set associated with the failed BFD-RS set, an indicator will be included in the BFR MAC CE to indicate which NBI-RS set the new beam (or the RS used as the new beam) comes from. The maximum number of RSs in the first, second, and third NBI-RS sets is the same or different. To keep the bit width of the new beam constant, the maximum number of RSs in each NBI-RS set is the same, for example, 64. Additionally, the indicator in the field of BFR MAC CE (which indicates which NBI-RS set the new beam comes from) is valid if the field corresponds to the serving cell, for which the field indicating beam failure detection is set to 1 and configured to have two BFD-RS sets (or more BFD-RS sets if there are more than two TRPs), wherein one of the two BFD-RS sets is associated with an activated additional PCI.

[0095] Figure 2 This is an example of BFR MAC CE according to aspects of this disclosure, which corresponds to TS 38.321. Figure 6 An exemplary design of an enhanced BFR MAC CE in .1.3.43-1.

[0096] refer to Figure 2 There exists a group containing 8 Fs. i An octet of fields (corresponding to indicators used to indicate which NBI-RS set the new beam comes from), where each F i The field indicates the candidate RS ID submission (indicating a new beam) of the ID field associated with the activated additional PCI (indicating the BFD-RS set) from the NBI-RS set (second NBI-RS set) associated with the ID or the additional NBI-RS set. For example, F set to '0' i This means that the candidate RS IDs of the BFD-RS set (indicated by the ID field in the MAC CE) come from the NBI-RS set (the second NBI-RS set) associated with the BFD-RS set, and the F is set to '1'. i This means that the candidate RS IDs of the BFD-RS set (indicated by the IDs submitted in MAC CE) come from an additional NBI-RS set associated with the BFD-RS set. Only when F i This field is only valid for the i-th serving cell, and for the serving cell, the corresponding SP or C iThe field is set to 1, and two BFD-RS sets are configured, one of which is associated with an activated additional PCI. For Figure 2 Other fields in the MAC CE, which are the same as those in TS 38.321. Figure 6 The fields for MAC CE in .1.3.43-1 are the same, and therefore will not be duplicated.

[0097] Figure 3 This is another example of BFR MAC CE according to aspects of this disclosure, which corresponds to TS 38.321. Figure 6 An exemplary design of an enhanced BFR MAC CE in section 1.3.43-2.

[0098] refer to Figure 3 There exists a group containing 32 Fs. i The fields (each corresponding to an indicator used to indicate which NBI-RS set the new beam comes from) are four octets, where each indicates that the candidate RS ID submission (indicating the new beam) of the ID field (indicating the BFD-RS set) associated with the activated additional PCI comes from the NBI-RS set (second NBI-RS set) associated with the ID or the additional NBI-RS set. For example, F set to '0' i This means that the candidate RS IDs of the BFD-RS set (indicated by the IDs submitted in the MAC CE) come from the NBI-RS set (the second NBI-RS set) associated with the BFD-RS set, and the F is set to '1'. i This means that the candidate RS IDs of the BFD-RS set (indicated by the IDs submitted in the MAC CE) come from an additional NBI-RS set associated with the BFD-RS set. Similarly, only if F i This field is valid only for the i-th serving cell. For that serving cell, the corresponding SP or Ci field is set to 1, and two BFD-RS sets are configured, one of which is associated with an activated additional PCI. For Figure 3 Other fields in the MAC CE, which are the same as those in TS 38.321. Figure 6 The fields for MAC CE in .1.3.43-2 are the same, and therefore will not be duplicated.

[0099] In the event that an RS associated with an inactive additional PCI is reported as a new beam associated with a BFD-RS set associated with an activated additional PCI, the UE (always on the network side) will update the activated additional PCI to a new activated additional PCI after the new beam is confirmed by the network side and applied in the UE. This new activated additional PCI is the additional PCI associated with the RS reported as the new beam. For example, after several symbols (e.g., the last symbol of a PDCCH received in DCI format from a PUSCH transmission that has the same HARQ procedure number as the first PUSCH carrying an indication of the new beam and a switched NDI field value), the new beam will be applied in the UE and the activated additional PCI will be switched.

[0100] This disclosure also considers UE behavior after switching an activated additional PCI to a new activated additional PCI that is associated with an additional PCI reported as a new beam.

[0101] For example, in some embodiments of this disclosure, the UE will exclude all RSs associated with a new, activated additional PCI from the NBI-RS set, which includes RSs associated with RSs that are not activated additional PCIs.

[0102] Taking an SSB as an example of an RS associated with an inactive additional PCI, if an SSB associated with an additional PCI is reported in the BFR MAC CE set of additional NBI-RSs, and it is acknowledged 28 symbols after the last symbol received from a PDCCH in DCI format, which is scheduled to carry a first PUSCH with the same HARQ procedure number as the first PUSCH carrying the BFR MAC CE and having a switching NDI field value, then all SSBs associated with the additional PCI associated with the SSB reported in the BFR MAC CE will be excluded from the additional NBI-RS set 28 symbols after the last symbol received from a PDCCH in DCI format, which is scheduled to carry a first PUSCH with the same HARQ procedure number as the first PUSCH carrying the BFR MAC CE and having a switching NDI field value. This is because the activated additional PCI is updated to the additional PCI associated with the SSB reported in the BFR MAC CE.

[0103] In some embodiments of this disclosure, before the MAC CE activates the TCI state of the TRP associated with the BFD-RS set associated with the new activated additional PCI, the UE will regard the RS indicated by the parameter as ssb-PositionsInBurst in the SSB-MTC-AdditionalPCI associated with the new activated additional PCI as the RS associated with the new activated additional PCI.

[0104] UL or DL ​​transmissions will be performed according to one or more of the following: any RS indicated by parameters as associated with the new activated additional PCI in the SSB-MTC-AdditionalPCI is considered an invalid symbol of PUSCH repetition type B; if an uplink transmission overlaps in the time domain with any RS indicated by parameters as associated with the new activated additional PCI in the SSB-MTC-AdditionalPCI, the uplink transmission is discarded; R indicated by parameters as associated with the new activated additional PCI in the SSB-MTC-AdditionalPCI, the R in the SSB-MTC-AdditionalPCI is discarded. The symbol of S is not expected to be indicated as an uplink symbol by DCI format 2_0; the symbol of RS in ssb-PositionsInBurst in SSB-MTC-AdditionalPCI associated with the new activated additional PCI is not expected to be indicated as an uplink by TDD-UL-DL general configuration or TDD-UL-DL specific configuration; and in the case where the PDCCH beam is updated to a new beam and at least one RE of the PDCCH candidate overlaps with at least one RE of the candidate RS corresponding to the RS index of ssb-PositionsInBurst in SSB-MTC-AdditionalPCI associated with the new activated additional PCI, the UE is not required to monitor the PDCCH candidate.

[0105] Taking the SSB as an example of an RS associated with an inactive additional PCI, in the case where the new beam is an SSB associated with an inactive additional PCI associated with a BFD-RS set associated with the CORESET pool index value, it is acknowledged 28 symbols after the last symbol received from a PDCCH in DCI format, which is scheduled to transmit a PUSCH with the same HARQ procedure number as the first PUSCH carrying the BFR MAC CE and having a switched NDI field value. Then, according to the new beam corresponding to the BFD-RS set, the channel and / or signal quasi-co-location (QCL) assumption and / or space transmission (Tx) filter and / or path loss (PL)-RS of the indicated joint and / or DL ​​and / or UL TCI states specific to the CORSET pool index value are updated. This means that the activated additional PCI is updated to the additional PCI associated with the new beam (the SSB reported in the BFR MAC CE). Before MAC CE activates the TCI state of the TRP identified by the CORESET pool index value, ssb-PositionsInBurst in the SSB-MTC-AdditionalPCI associated with the additional PCI associated with the new beam will be regarded as the SSB associated with the activated additional PCI.

[0106] Therefore, 28 symbols after the last symbol of a PDCCH received from a PUSCH transmitted with the same HARQ procedure number as the first PUSCH transmitted from a BFR MAC CE with a new beam that is scheduled to have an additional PCI associated with a carry indication but not with any activated TCI state, the UE will behave as follows:

[0107] Any SSB in ssb-PositionsInBurst associated with the PCI associated with SSB (New Beam) is considered an invalid symbol of PUSCH repetition type B.

[0108] If an uplink transmission overlaps in the time domain with any SSB in ssb-PositionsInBurst of the PCI associated with the SSB-MTC-AdditionalPCI and the SSB (New Beam), then the uplink transmission is dropped.

[0109] Symbols of SSB in ssb-PositionsInBurst associated with PCI associated with SSB (New Beam) are not expected to be indicated as uplink symbols by DCI format 2_0.

[0110] The symbol of the SSB in ssb-PositionsInBurst in the PCI associated with the SSB (New Beam) is not expected to be indicated as an uplink by tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated.

[0111] If the beam of a PDCCH candidate is updated to a new beam (SSB) and at least one RE of the PDCCH candidate overlaps with at least one RE of a candidate SSB corresponding to an SSB index provided by ssb-PositionsInBurst in the SSB-MTC-AdditionalPCI associated with the PCI associated with the SSB (new beam), then the UE is not required to monitor the PDCCH candidate; and

[0112] Consider any SSB in ssb-PositionsInBurst associated with the PCI associated with SSB (New Beam) in SSB-MTC-AdditionalPCI to determine the time slots for repetitive PUCCH transmissions with unpaired spectrum.

[0113] Considering the impact of the additional PCI activated during handover as described above, the corresponding part of the traditional 3GPP specification TS38.213 regarding the impact of not requiring the UE to monitor PDCCH candidates can be updated as follows or similarly:

[0114] For monitoring of PDCCH candidates by the UE, if the UE

[0115] - ssb-PositionsInBurst has been received in the SSB-MTCAdditionalPCI of the serving cell, and

[0116] - At least one RE of a PDCCH candidate overlaps with at least one RE of a candidate SS / PBCH block corresponding to an SS / PBCH block index provided by ssb-PositionsInBurst in SSB-MTCAdditionalPCI, which has the same physical cell identifier as the physical cell identifier associated with the new beam.

[0117] Therefore, UE monitoring of PDCCH candidates is not required.

[0118] Considering the impact of the additional PCI activated by the handover as described above, the following is an exemplary determination of time slots for repetitive PUCCH transmissions with unpaired spectrum, based on the traditional 3GPP specification TS38.213:

[0119] SS / PBCH block symbols are symbols for SS / PBCH blocks, where the candidate SS / PBCH block index corresponds to the SS / PBCH block index indicated to the UE by ssb-PositionsInBurst in SIB1 or ssb-PositionsInBurst in ServingCellConfigCommon or by NonCellDefiningSSB (if provided), or if the UE is not provided with dl-OrJoint-TCIStateList, by ssb-PositionsInBurst in SSB-MTCAdditionalPCI associated with the physical cell ID with an active TCI state, which is a set of symbols for a PDCCH or PDSCH or for a time slot corresponding to an SS / PBCH block configured for L1 beam measurement / reporting, or indicated by ssb-PositionsInBurst in SSB-MTCAdditionalPCI associated with the physical cell ID associated with the new beam.

[0120] For unpaired spectrum, the UE determines the spectrum used for PUCCH transmission. Each time slot begins with a time slot indicated to the UE for HARQ-ACK reporting as described in Clause 9.2.3, or with a time slot determined for SR reporting as described in Clause 9.2.4 or for CSI reporting as described in Clause 5.2.1.4 of [6, TS 38.214], and has

[0121] - UL symbols as described in Clause 11.1, or flexible symbols that are not provided by startingSymbolIndex as the first symbol for the SS / PBCH block, and

[0122] - For consecutive UL symbols as described in Clause 11.1, or flexible symbols that are not SS / PBCH block symbols, starting from the first symbol, the number of symbols provided by nrofsymbols shall be equal to or greater than the number of symbols provided by nrofsymbols.

[0123] Figure 4 An example of a UE 400 according to aspects of this disclosure is described. UE 400 may include a processor 402, a memory 404, a controller 406, and a transceiver 408. The processor 402, memory 404, controller 406, or transceiver 408, or various combinations thereof, or various components thereof, may be examples of components for performing the various aspects of this disclosure as described herein. These components may be coupled via one or more interfaces (e.g., operatively, communicatively, functionally, electronically, electrically).

[0124] Processor 402, memory 404, controller 406, or transceiver 408, or various combinations or components thereof, may be implemented in hardware (e.g., a circuit system). The hardware may be a processor, digital signal processor (DSP), application-specific integrated circuit (ASIC), or other programmable logic device, or any combination thereof configured or otherwise supporting components for performing the functions described in this disclosure.

[0125] Processor 402 may include intelligent hardware devices (e.g., a general-purpose processor, DSP, CPU, ASIC, FPGA, or any combination thereof). In some embodiments, processor 402 may be configured to operate memory 404. In some other embodiments, memory 404 may be integrated into processor 402. Processor 402 may be configured to execute computer-readable instructions stored in memory 404 to cause UE 400 to perform various functions of this disclosure.

[0126] Memory 404 may include volatile or non-volatile memory. Memory 404 may store computer-readable, computer-executable code containing instructions that, when executed by processor 402, cause UE 400 to perform the various functions described herein. The code may be stored in a non-transitory computer-readable medium, such as memory 404 or another type of memory. Computer-readable media includes both non-transitory computer storage media and communication media, wherein the communication media includes any medium that facilitates the transfer of a computer program from one place to another. Non-transitory storage media may be any available medium accessible by a general-purpose or special-purpose computer.

[0127] In some implementations, processor 402 and memory 404 coupled to processor 402 may be configured to cause UE 400 to perform one or more of the functions described herein (e.g., processor 402 executing instructions stored in memory 404). For example, processor 402 may support wireless communication at UE 400 according to an example disclosed herein. UE 400 may be configured to support means for receiving first configuration information indicating a serving cell PCI and a plurality of additional PCIs, wherein the plurality of additional PCIs includes an active additional PCI associated with at least one active TCI state and one or more inactive additional PCIs; means for receiving second configuration information indicating a first BFD-RS set associated with the serving cell PCI and a second BFD-RS set associated with the active additional PCI, wherein the second BFD-RS set is further associated with an RS associated with at least one of the one or more inactive additional PCIs; and means for performing uplink transmission based on the first configuration information and the second configuration information.

[0128] Controller 406 manages the input and output signals of UE 400. Controller 406 can also manage peripheral devices not integrated into UE 400. In some embodiments, controller 406 may utilize an operating system such as iOS®, ANDROID®, WINDOWS®, or other operating systems. In some embodiments, controller 406 may be implemented as part of processor 402.

[0129] In some embodiments, UE 400 may include at least one transceiver 408. In other embodiments, UE 400 may have more than one transceiver 408. Transceiver 408 may represent a wireless transceiver. Transceiver 408 may include one or more receiver chains 410, one or more transmitter chains 412, or a combination thereof.

[0130] Receiver chain 410 may be configured to receive signals (e.g., control information, data, or packets) via a wireless medium. For example, receiver chain 410 may include one or more antennas for receiving signals in the air or via a wireless medium. Receiver chain 410 may include at least one amplifier (e.g., a low-noise amplifier (LNA)) configured to amplify the received signal. Receiver chain 410 may include at least one demodulator configured to demodulate the received signal and obtain transmitted data by reversing the modulation technique applied during signal transmission. Receiver chain 410 may include at least one decoder for decoding the demodulated signal to receive the transmitted data.

[0131] Transmitter chain 412 can be configured to generate and transmit signals (e.g., control information, data, packets). Transmitter chain 412 may include at least one modulator for modulating data onto a carrier signal, preparing the signal for transmission over a wireless medium. The at least one modulator may be configured to support one or more techniques, such as amplitude modulation (AM), frequency modulation (FM), or digital modulation schemes like phase shift keying (PSK) or quadrature amplitude modulation (QAM). Transmitter chain 412 may also include at least one power amplifier configured to amplify the modulated signal to an appropriate power level suitable for transmission over a wireless medium. Transmitter chain 412 may also include one or more antennas for transmitting the amplified signal into the air or a wireless medium.

[0132] Figure 5An example of a processor 500 according to aspects of this disclosure is described. Processor 500 may be an example of a processor configured to perform various operations according to the examples described herein. Processor 500 may include a controller 502 configured to perform various operations according to the examples described herein. Processor 500 may optionally include at least one memory 504, which may be, for example, an L1 / L2 / L3 cache. Additionally or alternatively, processor 500 may optionally include one or more arithmetic logic units (ALUs) 506. One or more of these components may be electronically communicated or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more interfaces (e.g., buses).

[0133] Processor 500 may be a processor chipset and includes a protocol stack (e.g., a software stack) executed by the processor chipset to perform various operations (e.g., receive, acquire, retrieve, transmit, output, forward, store, determine, identify, access, write, read) according to the examples described herein. The processor chipset may include one or more cores, one or more caches (e.g., memory local to the processor chipset (e.g., processor 500) or included in the processor chipset) or other memory (e.g., random access memory (RAM), read-only memory (ROM), dynamic RAM (DRAM), synchronous dynamic RAM (SDRAM), static RAM (SRAM), ferroelectric RAM (FeRAM), magnetic RAM (MRAM), resistive RAM (RRAM), flash memory, phase-change memory (PCM), and others).

[0134] Controller 502 can be configured to manage and coordinate various operations of processor 500 (e.g., signaling, receiving, acquiring, retrieving, transmitting, outputting, forwarding, storing, determining, identifying, accessing, writing, and reading) to enable processor 500 to support various operations according to the examples described herein. For example, controller 502 can operate as a control unit of processor 500, generating control signals that manage the operation of various components of processor 500. These control signals include enabling or disabling functional units, selecting data paths, initiating memory access, and coordinating operation timing.

[0135] Controller 502 may be configured to fetch (e.g., obtain, retrieve, receive) instructions from memory 504 and determine subsequent instructions to be executed to enable processor 500 to support various operations according to the examples described herein. Controller 502 may be configured to track the memory addresses of instructions associated with memory 504. Controller 502 may be configured to decode instructions to determine the operations to be performed and the operands involved. For example, controller 502 may be configured to interpret instructions and determine control signals to be output to other components of processor 500 to enable processor 500 to support various operations according to the examples described herein. Additionally or alternatively, controller 502 may be configured to manage data flow within processor 500. Controller 502 may be configured to control data transfers between registers, arithmetic logic unit (ALU), and other functional units of processor 500.

[0136] Memory 504 may include one or more caches (e.g., memory local to processor 500 or included in processor 500) or other memories, such as RAM, ROM, DRAM, SDRAM, SRAM, MRAM, flash memory, etc. In some embodiments, memory 504 may reside within or on the processor chipset (e.g., local to processor 500). In some other embodiments, memory 504 may reside outside the processor chipset (e.g., remotely from processor 500).

[0137] Memory 504 may store computer-readable, computer-executable code containing instructions that, when executed by processor 500, cause processor 500 to perform the various functions described herein. The code may be stored in a non-transitory computer-readable medium, such as system memory or another type of memory. Controller 502 and / or processor 500 may be configured to execute computer-readable instructions stored in memory 504 to cause processor 500 to perform various functions. For example, processor 500 and / or controller 502 may be coupled to or coupled to memory 504, and processor 500, controller 502, and memory 504 may be configured to perform the various functions described herein. In some instances, processor 500 may include multiple processors, and memory 504 may include multiple memories. One or more of the multiple processors may be coupled to one or more of the multiple memories, and the multiple processors may be individually or collectively configured to perform the various functions described herein.

[0138] One or more ALUs 506 may be configured to support various operations according to the examples described herein. In some embodiments, one or more ALUs 506 may reside within or on a processor chipset (e.g., processor 500). In some other embodiments, one or more ALUs 506 may reside outside the processor chipset (e.g., processor 500). One or more ALUs 506 may perform one or more calculations on data, such as addition, subtraction, multiplication, and division. For example, one or more ALUs 506 may receive input operands and an opcode that determines the operation to be performed. One or more ALUs 506 may be configured with various logic and arithmetic circuitry, including adders, subtractors, shifters, and logic gates, to process and manipulate data according to the operation. Alternatively, one or more ALU 506s may support logical operations such as AND, OR, XOR, NOR, and NAND, enabling one or more ALU 506s to handle conditional operations, comparisons, and bitwise operations.

[0139] Processor 500 may support wireless communication according to examples disclosed herein. Processor 500 may be configured or operable to support means for receiving first configuration information indicating a serving cell PCI and a plurality of additional PCIs, wherein the plurality of additional PCIs includes an active additional PCI associated with at least one active TCI state and one or more inactive additional PCIs; means for receiving second configuration information indicating a first BFD-RS set associated with the serving cell PCI and a second BFD-RS set associated with the active additional PCIs, wherein the second BFD-RS set is further associated with an RS associated with at least one of the one or more inactive additional PCIs; and means for performing uplink transmission based on the first configuration information and the second configuration information.

[0140] Figure 6 An example of NE 600 according to aspects of this disclosure is described. NE 600 may include a processor 602, a memory 604, a controller 606, and a transceiver 608. The processor 602, memory 604, controller 606, or transceiver 608, or various combinations thereof, or various components thereof, may be examples of components for performing the various aspects of this disclosure as described herein. These components may be coupled via one or more interfaces (e.g., operatively, communicatively, functionally, electronically, electrically).

[0141] Processor 602, memory 604, controller 606, or transceiver 608, or various combinations or components thereof, may be implemented in hardware (e.g., a circuit system). The hardware may be a processor, digital signal processor (DSP), application-specific integrated circuit (ASIC), or other programmable logic device, or any combination thereof configured or otherwise supporting components for performing the functions described in this disclosure.

[0142] Processor 602 may include intelligent hardware devices (e.g., a general-purpose processor, DSP, CPU, ASIC, FPGA, or any combination thereof). In some embodiments, processor 602 may be configured to operate memory 604. In some other embodiments, memory 604 may be integrated into processor 602. Processor 602 may be configured to execute computer-readable instructions stored in memory 604 to cause NE 600 to perform various functions of this disclosure.

[0143] Memory 604 may comprise volatile or non-volatile memory. Memory 604 may store computer-readable, computer-executable code containing instructions that, when executed by processor 602, cause NE 600 to perform the various functions described herein. The code may be stored in a non-transitory computer-readable medium, such as memory 604 or another type of memory. Computer-readable media includes both non-transitory computer storage media and communication media, wherein the communication media includes any medium that facilitates the transfer of a computer program from one place to another. Non-transitory storage media may be any available medium accessible by a general-purpose or special-purpose computer.

[0144] In some embodiments, processor 602 and memory 604 coupled to processor 602 may be configured to cause NE 600 to perform one or more of the functions described herein (e.g., processor 602 executing instructions stored in memory 604). For example, processor 602 may support wireless communication at NE 600 according to an example disclosed herein. For example, NE 600 may be configured to support means for transmitting first configuration information indicating a serving cell PCI and a plurality of additional PCIs, wherein the plurality of additional PCIs includes an active additional PCI associated with at least one active TCI state and one or more inactive additional PCIs; means for transmitting second configuration information indicating a first BFD-RS set associated with the serving cell PCI and a second BFD-RS set associated with the active additional PCIs, wherein the second BFD-RS set is further associated with an RS associated with at least one of the one or more inactive additional PCIs; and means for performing uplink reception based on the first configuration information and the second configuration information.

[0145] Controller 606 manages the input and output signals of NE 600. Controller 606 can also manage peripheral devices not integrated into NE 600. In some embodiments, controller 606 may utilize an operating system such as iOS®, ANDROID®, WINDOWS®, or other operating systems. In some embodiments, controller 606 may be implemented as part of processor 602.

[0146] In some embodiments, NE 600 may include at least one transceiver 608. In other embodiments, NE 600 may have more than one transceiver 608. Transceiver 608 may represent a wireless transceiver. Transceiver 608 may include one or more receiver chains 610, one or more transmitter chains 612, or a combination thereof.

[0147] Receiver chain 610 may be configured to receive signals (e.g., control information, data, packets) via a wireless medium. For example, receiver chain 610 may include one or more antennas for receiving signals in the air or via a wireless medium. Receiver chain 610 may include at least one amplifier (e.g., a low-noise amplifier (LNA)) configured to amplify the received signal. Receiver chain 610 may include at least one demodulator configured to demodulate the received signal and obtain transmitted data by reversing the modulation technique applied during signal transmission. Receiver chain 610 may include at least one decoder for decoding the demodulated signal to receive transmitted data.

[0148] Transmitter chain 612 can be configured to generate and transmit signals (e.g., control information, data, packets). Transmitter chain 612 may include at least one modulator for modulating data onto a carrier signal, preparing the signal for transmission over a wireless medium. The at least one modulator may be configured to support one or more techniques, such as amplitude modulation (AM), frequency modulation (FM), or digital modulation schemes like phase shift keying (PSK) or quadrature amplitude modulation (QAM). Transmitter chain 612 may also include at least one power amplifier configured to amplify the modulated signal to an appropriate power level suitable for transmission over a wireless medium. Transmitter chain 612 may also include one or more antennas for transmitting the amplified signal into the air or a wireless medium.

[0149] Figure 7 A flowchart illustrating a method performed by a UE according to aspects of this disclosure is provided. The operation of the method can be implemented by a UE as described herein. In some embodiments, the UE can execute a set of instructions to control functional elements of the UE to perform the described functions.

[0150] At 701, the method may include receiving first configuration information indicating the serving cell PCI and a plurality of additional PCIs, wherein the plurality of additional PCIs includes an activated additional PCI associated with at least one activated TCI state and one or more inactive additional PCIs. Operation of 701 may be performed according to the examples described herein. In some embodiments, aspects of operation of 701 may be as described in references... Figure 4 The UE execution described.

[0151] At 703, the method may include receiving second configuration information indicating a first BFD-RS set associated with a serving cell PCI and a second BFD-RS set associated with an activated additional PCI, wherein the second BFD-RS set is further associated with an RS associated with at least one of one or more inactive additional PCIs. Operation of 703 may be performed according to the examples described herein. In some embodiments, aspects of operation of 703 may be as described in references... Figure 4 The UE execution described.

[0152] At point 705, the method may include performing an uplink transmission based on first configuration information and second configuration information. The operation of point 705 may be performed according to the examples described herein. In some implementations, aspects of the operation of point 705 may be as described in references... Figure 4 The UE execution described.

[0153] It should be noted that the method described herein describes one feasible implementation, and the operation and steps can be rearranged or otherwise modified, and other implementations are possible.

[0154] Figure 8 A flowchart illustrating a method performed by an NE according to aspects of this disclosure is provided. The operation of the method can be implemented by an NE as described herein. In some embodiments, the NE can execute a set of instructions to control the functional elements of the NE to perform the described functions.

[0155] At 801, the method may include first configuration information for transmitting an indication serving cell PCI and a plurality of additional PCIs, wherein the plurality of additional PCIs includes an active additional PCI associated with at least one active TCI state and one or more inactive additional PCIs. Operation of 801 may be performed according to the examples described herein. In some embodiments, aspects of the operation of 801 may be as described in references... Figure 6 The described NE execution.

[0156] At 803, the method may include second configuration information for transmitting a first BFD-RS set associated with the serving cell PCI and a second BFD-RS set associated with an activated additional PCI, wherein the second BFD-RS set is further associated with an RS associated with at least one of one or more inactive additional PCIs. Operation of 803 may be performed according to the examples described herein. In some embodiments, aspects of operation of 803 may be as described in references... Figure 6 The described NE execution.

[0157] At point 805, the method may include performing uplink reception based on first configuration information and second configuration information. The operation of point 805 may be performed according to the examples described herein. In some implementations, aspects of the operation of point 805 may be as described in references... Figure 6 The described NE execution.

[0158] It should be noted that the method described herein describes one feasible implementation, and the operation and steps can be rearranged or otherwise modified, and other implementations are possible.

[0159] The description herein is provided to enable those skilled in the art to make or use this disclosure. Various modifications to this disclosure will be apparent to those skilled in the art, and the general principles defined herein may be applied to other variations without departing from the scope of this disclosure. Therefore, this disclosure is not limited to the examples and designs described herein, but should be given the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A user equipment (UE) for wireless communication, comprising: at least one memory; and at least one processor coupled with the at least one memory and configured to cause the UE to: receive first configuration information indicating a serving cell PCI and a plurality of additional physical cell identifiers (PCIs), wherein the plurality of additional PCIs includes an activated additional PCI associated with at least one activated transmission configuration indication (TCI) state and one or more unactivated additional PCIs; receive second configuration information indicating a first set of beam failure detection (BFD)-reference signals (RSs) associated with the serving cell PCI and a second set of BFD-RSs associated with the activated additional PCIs, wherein the second set of BFD-RSs is further associated with RSs associated with at least one of the one or more unactivated additional PCIs; and perform uplink transmission based on the first configuration information and the second configuration information.

2. The UE of claim 1, wherein the second set of BFD-RSs is associated with a new beam indicator (NBI-RS) set including at least the RSs associated with at least one of the one or more unactivated additional PCIs.

3. The UE of claim 2, wherein, a maximum number of RSs in the NBI-RS set associated with unactivated additional PCIs or a maximum number of unactivated additional PCIs associated with the NBI-RS set is dependent on a capability of the UE.

4. The UE of claim 2, wherein, the at least one processor is configured to cause the UE to: report a new beam in a medium access control (MAC) control element (CE) if the second set of BFD-RSs is detected as a beam failure and there is at least one RS in the NBI-RS set whose layer L1-reference signal received power (RSRP) is greater than or equal to a beam failure recovery threshold, the new beam being a RS in the at least one RS whose L1-RSRP is greater than or equal to the beam failure recovery threshold; or report an indicator indicating that no new beam is reported in the MAC CE if the second set of BFD-RSs is detected as a beam failure and L1-RSRP of all RSs in the NBI-RS set is less than the beam failure recovery threshold.

5. The UE of claim 1, wherein, the second set of BFD-RSs is associated with a second new beam indicator (NBI-RS) set including RSs associated with the serving cell PCI, the RSs associated with the activated additional PCIs, or a combination thereof, and a third NBI-RS set including the RSs associated with at least one of the one or more unactivated additional PCIs.

6. The UE of claim 5, wherein, a maximum number of RSs in the third NBI-RS set associated with unactivated additional PCIs or a maximum number of unactivated additional PCIs associated with the third NBI-RS set is dependent on a capability of the UE.

7. The UE of claim 5, wherein, the first set of BFD-RSs is associated with a first NBI-RS set, and a maximum number of RSs in the first NBI-RS set, the second NBI-RS set, and the third NBI-RS set is the same.

8. The UE of claim 5, wherein, The at least one processor is configured to cause the UE to measure a RS in the third NBI-RS set if the second BFD-RS set is detected as a beam failure and a layer L1 -reference signal received power, RSRP, of all RSs in the second NBI-RS set is less than a beam failure recovery threshold.

9. The UE of claim 8, wherein, The at least one processor is configured to cause the UE to: report, in a medium access control, MAC, control element, CE, a new beam if there is at least one RS in the third NBI-RS set whose L1 -RSRP is greater than or equal to the beam failure recovery threshold, the new beam being a RS in the at least one RS whose L1 -RSRP is greater than or equal to the beam failure recovery threshold; or report, in the MAC CE, an indicator indicating no new beam is reported if L1 -RSRP of all RSs in the third NBI-RS set is less than the beam failure recovery threshold.

10. The UE of claim 5, wherein, The at least one processor is configured to cause the UE to: report, in a medium access control, MAC, control element, CE, a new beam if there is at least one RS in the third NBI-RS set whose L1 -RSRP is greater than or equal to the beam failure recovery threshold, the new beam being a RS in the at least one RS whose L1 -RSRP is greater than or equal to the beam failure recovery threshold; or 11. The UE of claim 1, wherein, report, in the MAC CE, an indicator indicating no new beam is reported if L1 -RSRP of all RSs in the third NBI-RS set is less than the beam failure recovery threshold. The at least one processor is configured to cause the UE to:

12. The UE of claim 11, wherein, report, in a medium access control, MAC, control element, CE, a new beam if there is at least one RS in the third NBI-RS set whose L1 -RSRP is greater than or equal to the beam failure recovery threshold, the new beam being a RS in the at least one RS whose L1 -RSRP is greater than or equal to the beam failure recovery threshold; or 13. The UE of claim 11, wherein, report, in the MAC CE, an indicator indicating no new beam is reported if L1 -RSRP of all RSs in the third NBI-RS set is less than the beam failure recovery threshold.

14. The UE of claim 13, wherein, The at least one processor is configured to cause the UE to: report, in a medium access control, MAC, control element, CE, a new beam if there is at least one RS in the third NBI-RS set whose L1 -RSRP is greater than or equal to the beam failure recovery threshold, the new beam being a RS in the at least one RS whose L1 -RSRP is greater than or equal to the beam failure recovery threshold; or report, in the MAC CE, an indicator indicating no new beam is reported if L1 -RSRP of all RSs in the third NBI-RS set is less than the beam failure recovery threshold. The at least one processor is configured to cause the UE to: report, in a medium access control, MAC, control element, CE, a new beam if there is at least one RS in the third NBI-RS set whose L1 -RSRP is greater than or equal to the beam failure recovery threshold, the new beam being a RS in the at least one RS whose L1 -RSRP is greater than or equal to the beam failure recovery threshold; or report, in the MAC CE, an indicator indicating no new beam is reported if L1 -RSRP of all RSs in the third NBI-RS set is less than the beam failure recovery threshold. The at least one processor is configured to cause the UE to: report, in a medium access control, MAC, control element, CE, a new beam if there is at least one RS in the third NBI-RS set whose L1 -RSRP is greater than or equal to the beam failure recovery threshold, the new beam being a RS in the at least one RS whose L1 -RSRP is greater than or equal to the beam failure recovery threshold; or report, in the MAC CE, an indicator indicating no new beam is reported if L1 -RSRP of all RSs in the third NBI-RS set is less than the beam failure recovery threshold. The at least one processor is configured to cause the UE to: report, in a medium access control, MAC, control element, CE, a new beam if there is at least one RS in the third NBI-RS set whose L1 -RSRP is greater than or equal to the beam failure recovery threshold, the new beam being a RS in the at least one RS whose L1 -RSRP is greater than or equal to the beam failure recovery threshold; or report, in the MAC CE, an indicator indicating no new beam is reported if L1 -RSRP of all RSs in the third NBI-RS set is less than the beam failure recovery threshold. drop the uplink transmission if the uplink transmission overlaps in the time domain with any of the RSs indicated by ssb-PositionsInBurst in SSB-MTC-AdditionalPCI indicated by the parameter as being associated with the newly activated additional PCI; symbols of the RSs indicated by ssb-PositionsInBurst in SSB-MTC-AdditionalPCI indicated by the parameter as being associated with the newly activated additional PCI are not expected to be indicated as uplink symbols by a downlink control information, DCI, format 2_0; symbols of the RSs indicated by ssb-PositionsInBurst in SSB-MTC-AdditionalPCI indicated by the parameter as being associated with the newly activated additional PCI are not expected to be indicated as uplink by a time division duplex, TDD, -Uplink, UL-Downlink, DL, common configuration or a TDD-UL-DL dedicated configuration; and and the UE is not required to monitor a physical downlink control channel, PDCCH, candidate if a beam of the PDCCH is updated to a new beam and at least one resource element, RE, of the PDCCH candidate overlaps with at least one RE of a candidate RS corresponding to an RS index provided by ssb-PositionsInBurst in SSB-MTC-AdditionalPCI indicated by a parameter as being associated with the newly activated additional PCI.

15. The UE of claim 1, wherein, the at least one processor is configured to cause the UE to perform the uplink transmission in accordance with one or more of: any of the RSs associated with at least one of the one or more unactivated additional PCIs are treated as invalid symbols for physical uplink shared channel, PUSCH, repetition Type B; drop the uplink transmission if the uplink transmission overlaps in the time domain with a RS of the RSs associated with at least one of the one or more unactivated additional PCIs; symbols of the RSs associated with at least one of the one or more unactivated additional PCIs are not expected to be indicated as uplink symbols by a downlink control information, DCI, format 2_0; and symbols of the RSs associated with at least one of the one or more unactivated additional PCIs are not expected to be indicated as uplink by a time division duplex, TDD, -Uplink, UL-Downlink, DL, common configuration or a TDD-UL-DL dedicated configuration.

16. The UE of claim 1, wherein, the RSs associated with at least one of the one or more unactivated additional PCIs are channel state information, CSI-RSs, or synchronization signal, SS / physical broadcast channel, PBCH, blocks, SSBs.

17. The UE of claim 16, wherein, the RSs associated with at least one of the one or more unactivated additional PCIs are SSBs, and the at least one processor is configured to cause the UE to perform the uplink transmission in accordance with: A determination of a slot for a physical pink control channel, PUCCH, transmission with repetition to unpaired spectrum will exclude flexible symbols that are SSB symbols, starting from a first symbol provided by a start symbol index, equal to or greater than a number of symbols of the RS associated with at least one of the one or more inactivated additional PCIs.

18. A processor for wireless communication, comprising: at least one controller coupled with at least one memory and configured to cause the processor to: receive first configuration information indicating a serving cell PCI and a plurality of additional physical cell identifiers, PCIs, wherein the plurality of additional PCIs includes an activated additional PCI associated with at least one activated transmission configuration indication, TCI, state and one or more inactivated additional PCIs; receive second configuration information indicating a first set of beam failure detection, BFD, -reference signals, RSs, associated with the serving cell PCI and a second set of BFD-RSs associated with the activated additional PCIs, wherein the second set of BFD-RSs is further associated with RSs associated with at least one of the one or more inactivated additional PCIs; and perform uplink transmission based on the first configuration information and the second configuration information.

19. A network equipment, NE, for wireless communication, comprising: at least one memory; and at least one processor coupled with the at least one memory and configured to cause the NE to: transmit first configuration information indicating a serving cell PCI and a plurality of additional physical cell identifiers, PCIs, wherein the plurality of additional PCIs includes an activated additional PCI associated with at least one activated transmission configuration indication, TCI, state and one or more inactivated additional PCIs; transmit second configuration information indicating a first set of beam failure detection, BFD, -reference signals, RSs, associated with the serving cell PCI and a second set of BFD-RSs associated with the activated additional PCIs, wherein the second set of BFD-RSs is further associated with RSs associated with at least one of the one or more inactivated additional PCIs; and perform uplink reception based on the first configuration information and the second configuration information.

20. A method performed by a user equipment, UE, comprising: receiving first configuration information indicating a serving cell PCI and a plurality of additional physical cell identifiers, PCIs, wherein the plurality of additional PCIs includes an activated additional PCI associated with at least one activated transmission configuration indication, TCI, state and one or more inactivated additional PCIs; receiving second configuration information indicating a first set of beam failure detection, BFD, -reference signals, RSs, associated with the serving cell PCI and a second set of BFD-RSs associated with the activated additional PCIs, wherein the second set of BFD-RSs is further associated with RSs associated with at least one of the one or more inactivated additional PCIs; and performing uplink transmission based on the first configuration information and the second configuration information.

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