WO2024152593A1

WO2024152593A1 - Method and apparatus of supporting beam failure recovery

Info

Publication number: WO2024152593A1
Application number: PCT/CN2023/120076
Authority: WO
Inventors: Wei Ling; Bingchao LIU; Yi Zhang; Chenxi Zhu
Original assignee: Lenovo Beijing Ltd
Current assignee: Lenovo Beijing Ltd
Priority date: 2023-09-20
Filing date: 2023-09-20
Publication date: 2024-07-25
Anticipated expiration: 2026-03-20

Abstract

Various aspects of the present disclosure relate to a method and apparatus of 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 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 RSs 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

METHOD AND APPARATUS OF SUPPORTING BEAM FAILURE RECOVERY

TECHNICAL FIELD

The present disclosure relates to wireless communications, and more specifically to a method and apparatus of supporting beam failure recovery (BFR) .

BACKGROUND

A wireless communications system may include one or multiple network communication devices, such as base stations, which may support wireless communications for one or multiple user communication devices, which may be otherwise known as user equipment (UE) , or other suitable terminology. The wireless communications system may support wireless communications with one or multiple user communication devices by utilizing resources of the wireless communication system (e.g., time resources (e.g., symbols, slots, subframes, frames, or the like) or frequency resources (e.g., subcarriers, carriers, or the like) . Additionally, the wireless communications system may support wireless communications across various radio access technologies including third generation (3G) radio access technology, fourth generation (4G) radio access technology, fifth generation (5G) radio access technology, among other suitable radio access technologies beyond 5G (e.g., sixth generation (6G) ) .

SUMMARY

An article “a” before an element is unrestricted and understood to refer to “at least one” of those elements or “one or more” of those elements. The terms “a, ” “at least one, ” “one or more, ” and “at least one of one or more” may be interchangeable. As used herein, including in the claims, “or” as used in a list of items (e.g., a list of items prefaced by a phrase such as “at least one of” or “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) . Also, as used herein, the phrase “based on” shall not be construed as a reference to a closed set of conditions. For example, an example step that is described as “based on condition A” may be based on both a condition A and a condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase “based on” shall be construed in the same manner as the phrase “based at least in part on. Further, as used herein, including in the claims, a “set” may include one or more elements.

Some implementations of the methods and apparatuses described herein may further include a UE for wireless communication, which may include: 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 non-activated additional PCIs; receive 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 activated additional PCI, wherein the second BFD-RS set is further associated with RSs associated with at least one of the one or more non-activated additional PCIs; and perform uplink (UL) transmission based on the first configuration information and the second configuration information.

In some implementations of the methods and apparatuses described herein, the second BFD-RS set is associated with a new beam indicator (NBI) -RS set at least including the RSs associated with at least one of the one or more non-activated additional PCIs.

In some implementations of the methods and apparatuses described herein, a maximum number of RSs associated with non-activated additional PCIs in the NBI-RS set or a maximum number of non-activated additional PCIs associated with the NBI-RS set depends on capability of the UE.

In some implementations of the methods and apparatuses described herein, the at least one processor is configured to cause the UE to: in the case that the second BFD-RS set is detected as beam failure and there is at least one RS whose layer (L) 1-reference signal receiving power (RSRP) is larger than or equal to a beam failure recovery threshold in the NBI-RS set, report a new beam in a media access control (MAC) control element (CE) which is a RS of the at least one RS whose L1-RSRP is larger than or equal to a beam failure recovery threshold; or in the case that the second BFD-RS set is detected as beam failure and L1-RSRP of all RSs in the NBI-RS set are less than the beam failure recovery threshold, report an indicator which indicates that no new beam is reported in the MAC CE.

In some implementations of the methods and apparatuses described herein, the second BFD-RS set is associated with a second NBI-RS set including RSs associated with the serving cell PCI, the RSs associated with the activated additional PCI, or a combination thereof and a third NBI-RS set including the RSs associated with at least one of the one or more non-activated additional PCIs.

In some implementations of the methods and apparatuses described herein, a maximum number of RSs associated with non-activated additional PCIs in the third NBI-RS set or a maximum number of non-activated additional PCIs associated with the third NBI-RS set depends on capability of the UE.

In some implementations of the methods and apparatuses described herein, the first BFD-RS set 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 are same.

In some implementations of the methods and apparatuses described herein, the at least one processor is configured to cause the UE to measure RSs in the third NBI-RS set in the case that the second BFD-RS set is detected as beam failure and L1-RSRP of all RSs in the second NBI-RS set is less than a beam failure recovery threshold.

In some implementations of the methods and apparatuses described herein, the at least one processor is configured to cause the UE to: in the case that there is at least one RS whose L1-RSRP is larger than or equal to the beam failure recovery threshold in the third NBI-RS set, report a new beam in a MAC CE which is a RS of the at least one RS whose L1-RSRP is larger than or equal to the beam failure recovery threshold; or in the case that L1-RSRP of all RSs in the third NBI-RS set are less than the beam failure recovery threshold, report an indicator in the MAC CE which indicates that no new beam is reported.

In some implementations of the methods and apparatuses described herein, the at least one processor is configured to cause the UE to: in the case of reporting a new beam in a MAC CE which is a RS from the second NBI-RS set or the third NBI-RS set, report an indicator in a field of the MAC CE which indicates from which NBI-RS set the new beam is.

In some implementations of the methods and apparatuses described herein, the indicator in the field is valid in the case that the field corresponds to a serving cell for which a field indicating beam failure detection is set to 1 and is configured with two BFD-RS sets where one of the two BFD-RS sets is associated with the activated additional PCI.

In some implementations of the methods and apparatuses described herein, the at least one processor is configured to cause the UE to receive radio resource control (RRC) reconfiguration or MAC CE updating for updating the third NBI-RS set.

In some implementations of the methods and apparatuses described herein, wherein, in the case that a RS of the RSs associated with at least one of the one or more non-activated 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: update the activated additional PCI to a new activated additional PCI after the new beam is applied in the UE, wherein the new activated additional PCI is an additional PCI associated with the RS reported as the new beam.

In some implementations of the methods and apparatuses described herein, the at least one processor is configured to cause the UE to exclude all RSs associated with the new activated additional PCI from the RSs associated with at least one of the one or more non-activated additional PCIs.

In some implementations of the methods and apparatuses described herein, the at least one processor is configured to cause the UE to treat RSs indicated by a parameter as ssb-PositionsInBurst in SSB-MTC-AdditionalPCI associated with the new activated additional PCI as RSs associated with the new activated additional PCI before a MAC CE to activate TCI states for a transmit-receive point (TRP) associated with the second BFD-RS set.

In some implementations of the methods and apparatuses 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 SSB-MTC-AdditionalPCI associated with the new activated additional PCI is considered as invalid symbols for physical uplink shared channel (PUSCH) repetition type B; an uplink transmission is dropped in the case that the uplink transmission is overlapped with any RS indicated by the parameter as ssb-PositionsInBurst in SSB-MTC-AdditionalPCI associated with the new activated additional PCI in time domain; symbols of the RSs indicated by the parameter as ssb-PositionsInBurst in SSB-MTC-AdditionalPCI associated with the new activated additional PCI are not expected to be indicated as uplink symbols by downlink control information (DCI) format 2_0; symbols of the RSs indicated by the parameter as ssb-PositionsInBurst in SSB-MTC-AdditionalPCI associated with the new activated additional PCI are not expected to be indicated as uplink by time divisional duplexing (TDD) -UL-DL common configuration, or TDD-UL-DL dedicated configuration; and the UE is not required to monitor a physical downlink control channel (PDCCH) candidate in the case that a beam of the PDCCH is updated as the new beam and at least one resource element (RE) for the PDCCH candidate overlaps with at least one RE of a candidate RS corresponding to a RS index indicated by the parameter as ssb-PositionsInBurst in SSB-MTC-AdditionalPCI associated with the new activated additional PCI.

In some implementations of the methods and apparatuses 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 of the RSs associated with at least one of the one or more non-activated additional PCIs is considered as invalid symbols for PUSCH repetition type B; an uplink transmission will be dropped in the case that the uplink transmission is overlapped with a RS of the RSs associated with at least one of the one or more non-activated additional PCIs in time domain; symbols of the RS of the RSs associated with at least one of the one or more non-activated additional PCIs are not expected to be indicated as uplink symbols by DCI format 2_0; and symbols of the RS of the RSs associated with at least one of the one or more non-activated additional PCIs are not expected to be indicated as uplink symbols by TDD-UL-DL common configuration, or TDD-UL-DL dedicated configuration.

In some implementations of the methods and apparatuses described herein, the RSs associated with at least one of the one or more non-activated additional PCIs is a channel state information (CSI) -RS or synchronization signal (SS) /physical broadcast channel (PBCH) block (SSB) .

In some implementations of the methods and apparatuses described herein, the RSs associated with at least one of the one or more non-activated additional PCIs are SSB, and the at least one processor is configured to cause the UE to perform the uplink transmission according to the following: determination of slots for a physical pink control channel (PUCCH) transmission with repetitions for unpaired spectrum will exclude flexible symbols that are SSB symbols, starting from a first symbol provided by a starting symbol index, equal to or larger than a number of symbols of the RSs associated with at least one of the one or more non-activated additional PCIs.

In some implementations of the methods and apparatuses described herein, after a number of symbols from a last symbol of a PDCCH reception with a DCI format scheduling a PUSCH transmission with a same hybrid automatic repeat request (HARQ) process number as for transmission of a first PUSCH carrying a MAC CE indicating the new beam and having a toggled network device interface (NDI) field value, the new beam is applied in the UE.

Some implementations of the methods and apparatuses described herein may further include a processor for wireless communication, which may include: 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 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; receive 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 RSs associated with at least one of the one or more non-activated additional PCIs; and perform uplink transmission based on the first configuration information and the second configuration information.

Some implementations of the methods and apparatuses 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 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 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; transmit 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 RSs associated with at least one of the one or more non-activated additional PCIs; and perform uplink reception based on the first configuration information and the second configuration information.

Some implementations of the methods and apparatuses described herein may further include a method performed by a UE, which 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 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 RSs 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.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 illustrates an example of a wireless communications system in accordance with aspects of the present disclosure.

Figure 2 is an example of a BFR MAC CE in accordance with aspects of the present disclosure.

Figure 3 is another example of a BFR MAC CE in accordance with aspects of the present disclosure.

Figure 4 illustrates an example of a UE in accordance with aspects of the present disclosure.

Figure 5 illustrates an example of a processor in accordance with aspects of the present disclosure.

Figure 6 illustrates an example of a NE in accordance with aspects of the present disclosure.

Figure 7 illustrates a flowchart of a method performed by a UE in accordance with aspects of the present disclosure.

Figure 8 illustrates a flowchart of a method performed by a NE in accordance with aspects of the present disclosure.

DETAILED DESCRIPTION

Beam management is an important topic in multiple-input multiple-output (MIMO) for new radio (NR) . A "beam" can be represented by or be associated with spatial relation information, TCI state, or RS etc. In 3rd generation partnership project (3GPP) release (Rel) -15, a random access channel (RACH) -based BFR is defined for primary cell (PCell) ; and in Rel-16, a MAC CE-based BFR with physical uplink control channel scheduling request (PUCCH-SR) is defined for secondary cell (SCell) . However, both the BFRs for PCell and SCell are only defined for single-TRP transmission. For multi-TRP transmission, the beam failure recovery can be performed respectively for each TRP, i.e., TRP-specific BFR, which is agreed to be supported in Rel-17 and is designed based on Rel-16 SCell BFR scheme. In an exemplary TRP-specific BFR, two failure detection resource sets which can also be named as two BFD-RS sets will be configured in a cell, wherein each failure detection resource set is associated with a TRP. In addition, two candidate resource sets which can also be named as NBI-RS sets are configured by one to one associated 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., a RS in a failure detection resource set and candidate resource set represent a corresponding beam.

In addition, in accordance with legacy specification (s) , if inter-cell multi-DCI (M-DCI) based M-TRP operation is applied, then one TRP is associated with the serving cell PCI and the other TRP is associated with an activated additional PCI where at least one activated TCI state is associated with the activated additional PCI and the number of activated additional PCI is 1. In addition, only SSBs 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, only one of the SSBs associated with the activated additional PCI other than the deactivated additional PCI (or non-activated additional PCI) or a RS associated with the serving cell PCI can be selected as a new beam.

However, no new beam can be found if UE moves to the coverage of another additional PCI other than the activated additional PCI. In this case, the network side, e.g., a gNB may trigger a beam report where at least SSBs associated with other additional PCI (s) in addition to the activated additional PCI are configured as RSs for channel measurement. SSBs associated with other additional PCI (s) may be reported, so that the gNB will switch the activated additional PCI to a new activated additional PCI according to the beam report by updating the TCI state activation MAC CE where there is at least one TCI state associated with the new activated additional PCI and indicate a TCI state associated with the new activated additional PCI by DCI. It can be seen, in legacy technologies, there is a large latency of switching of activated additional PCI in inter-cell M-DCI based M-TRP operation.

At least considering the aforementioned technical problem, the present disclosure provides a technical solution of supporting beam failure recovery, e.g., a method and apparatus of supporting beam failure recovery, wherein, how to quickly switch to a new activated additional PCI in view of TRP-specific BFR and UE behaviours after switching to the new activated additional PCI etc., are considered in the present disclosure.

For example, in some implementations of the present application, for TRP-specific BFR, RSs, e.g., CSI-RSs or SSBs associated with non-activated additional PCI (s) can be configured in a NBI-RS set one to one associated with a BFD-RS set associated with the activated additional PCI, wherein a RS associated with a non-activated additional PCI may be selected from the NBI-RS set associated with the BFD-RS set associated with the activated additional PCI and reported as a new beam.

In some other implementations of the present application, for TRP-specific BFR, a BFD-RS set associated with the activated additional PCI are 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 an additional NBI-RS set compared with only one in the legacy) is configured to include RSs associated with non-activated additional PCI (s) . RSs in the additional NBI-RS set are measured only when the following two conditions are satisfied, i.e., the BFD-RS set associated with the activated additional PCI is detected as beam failure; and no new beam can be found in the NBI-RS set associated with the BFD-RS set which is configured to include only RSs associated with the serving cell PCI and/or the activated additional PCI (e.g., L1-RSRP of all RSs in the NBI-RS set is less than a threshold configured for TRP-specific BFR, e.g., a threshold (Q_in, _LR) as specified in 3GPP TS 38.133) .

In short, aspects of the present disclosure at least propose an enhanced TRP-specific BFR, e.g., for inter-cell M-DCI based M-TRP, which can reduce the latency of switching of activated additional PCI.

Aspects of the present disclosure are described in the context of a wireless communications system.

Figure 1 illustrates an example of a wireless communications system 100 in accordance with aspects of the present disclosure. The wireless communications system 100 may include one or more NE 102, one or more UE 104, and a core network (CN) 106. The wireless communications system 100 may support various radio access technologies. In some implementations, the wireless communications system 100 may be a 4G network, such as an LTE network or an LTE-Advanced (LTE-A) network. In some other implementations, the wireless communications system 100 may be a NR network, such as a 5G network, a 5G-Advanced (5G-A) network, or a 5G ultrawideband (5G-UWB) network. In other implementations, the wireless communications system 100 may be a combination of a 4G network and a 5G network, or other suitable radio access technology including Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi) , IEEE 802.16 (WiMAX) , IEEE 802.20. The wireless communications system 100 may support radio access technologies beyond 5G, for example, 6G. Additionally, the wireless communications system 100 may support technologies, such as time division multiple access (TDMA) , frequency division multiple access (FDMA) , or code division multiple access (CDMA) , etc.

The one or more NE 102 may be dispersed throughout a geographic region to form the wireless communications system 100. One or more of the NE 102 described herein may be or include or may be referred to as a network node, a base station, a network element, a network function, a network entity, a radio access network (RAN) , a NodeB, an eNodeB (eNB) , a next-generation NodeB (gNB) , or other suitable terminology. An NE 102 and a UE 104 may communicate via a communication link, which may be a wireless or wired connection. For example, an NE 102 and a UE 104 may perform wireless communication (e.g., receive signaling, transmit signaling) over a Uu interface.

An NE 102 may provide a geographic coverage area for which the NE 102 may support services for one or more UEs 104 within the geographic coverage area. For example, an NE 102 and a UE 104 may support wireless communication of signals related to services (e.g., voice, video, packet data, messaging, broadcast, etc. ) according to one or multiple radio access technologies. In some implementations, an NE 102 may be moveable, for example, a satellite associated with a non-terrestrial network (NTN) . In some implementations, different geographic coverage areas 112 associated with the same or different radio access technologies may overlap, but the different geographic coverage areas may be associated with different NE 102.

The one or more UE 104 may be dispersed throughout a geographic region of the wireless communications system 100. A UE 104 may include or may be referred to as a remote unit, a mobile device, a wireless device, a remote device, a subscriber device, a transmitter device, a receiver device, or some other suitable terminology. In some implementations, the UE 104 may be referred to as a unit, a station, a terminal, or a client, among other examples. Additionally, or alternatively, the UE 104 may be referred to as an Internet-of-Things (IoT) device, an Internet-of-Everything (IoE) device, or machine-type communication (MTC) device, among other examples.

A UE 104 may be able to support wireless communication directly with other UEs 104 over a communication link. For example, a UE 104 may support wireless communication directly with another UE 104 over 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, the communication link 114 may be referred to as a sidelink. For example, a UE 104 may support wireless communication directly with another UE 104 over a PC5 interface.

An NE 102 may support communications with the CN 106, or with another NE 102, or both. For example, an NE 102 may interface with other NE 102 or the CN 106 through one or more backhaul links (e.g., S1, N2, N2, or network interface) . In some implementations, the NE 102 may communicate with each other directly. In some other implementations, the NE 102 may communicate with each other or indirectly (e.g., via the CN 106. In some implementations, one or more NE 102 may include subcomponents, such as an access network entity, which may be an example of an access node controller (ANC) . An ANC may communicate with the one or more UEs 104 through one or more other access network transmission entities, which may be referred to as a radio heads, smart radio heads, or transmission-reception points (TRPs) .

The CN 106 may support user authentication, access authorization, tracking, connectivity, and other access, routing, or mobility functions. The CN 106 may be an evolved packet core (EPC) , or a 5G core (5GC) , which may include a control plane entity that manages access and mobility (e.g., a mobility management entity (MME) , an access and mobility management functions (AMF) ) and a user plane entity that routes 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 entity may manage non-access stratum (NAS) functions, such as mobility, authentication, and bearer management (e.g., data bearers, signal bearers, etc. ) for the one or more UEs 104 served by the one or more NE 102 associated with the CN 106.

The CN 106 may communicate with a packet data network over one or more backhaul links (e.g., via an S1, N2, N2, or another network interface) . The packet data network may include an application server. In some implementations, one or more UEs 104 may communicate with the application server. A UE 104 may establish a session (e.g., a protocol data unit (PDU) session, or the like) with the CN 106 via an NE 102. The CN 106 may route traffic (e.g., control information, data, and the like) between the UE 104 and the application server using the established session (e.g., the established PDU session) . The PDU session may be an example of a logical connection between the UE 104 and the CN 106 (e.g., one or more network functions of the CN 106) .

In the wireless communications system 100, the NEs 102 and the UEs 104 may use resources of the wireless communications system 100 (e.g., time resources (e.g., symbols, slots, subframes, frames, or the like) or frequency resources (e.g., subcarriers, carriers) ) to perform various operations (e.g., wireless communications) . In some implementations, the NEs 102 and the UEs 104 may support different resource structures. For example, the NEs 102 and the UEs 104 may support different frame structures. In some implementations, such as in 4G, the NEs 102 and the UEs 104 may support a single frame structure. In some other implementations, such as in 5G and among other suitable radio access technologies, the NEs 102 and the UEs 104 may support various frame structures (i.e., multiple frame structures) . The NEs 102 and the UEs 104 may support various frame structures based on one or more numerologies.

One or more numerologies may be supported in the wireless communications system 100, and a numerology may include a subcarrier spacing and a cyclic prefix. A first numerology (e.g., μ=0) may be associated with a first subcarrier spacing (e.g., 15 kHz) and a normal cyclic prefix. In some implementations, the first numerology (e.g., μ=0) associated with the first subcarrier spacing (e.g., 15 kHz) may utilize one slot per subframe. A second numerology (e.g., μ=1) may be associated with a second subcarrier spacing (e.g., 30 kHz) and a normal cyclic prefix. A third numerology (e.g., μ=2) may be associated with a third subcarrier spacing (e.g., 60 kHz) and a normal cyclic prefix or an extended cyclic prefix. A fourth numerology (e.g., μ=3) may be associated with a fourth subcarrier spacing (e.g., 120 kHz) and a normal cyclic prefix. A fifth numerology (e.g., μ=4) may be associated with a fifth subcarrier spacing (e.g., 240 kHz) and a normal cyclic prefix.

A time interval of a resource (e.g., a communication resource) may be organized according to frames (also referred to as radio frames) . Each frame may have a duration, for example, a 10 millisecond (ms) duration. In some implementations, each frame may include multiple subframes. For example, each frame may include 10 subframes, and each subframe may have a duration, for example, a 1 ms duration. In some implementations, each frame may have the same duration. In some implementations, each subframe of a frame may have the same duration.

Additionally or alternatively, a time interval of a resource (e.g., a communication resource) may be organized according to slots. For example, a subframe may include a number (e.g., quantity) of slots. The number of slots in each subframe may also depend on the one or more numerologies supported in the wireless communications system 100. For instance, the first, second, third, fourth, and fifth numerologies (i.e., μ=0, μ=1, μ=2, μ=3, μ=4) associated with respective subcarrier spacings of 15 kHz, 30 kHz, 60 kHz, 120 kHz, and 240 kHz may utilize a single slot per subframe, two slots per subframe, four slots per subframe, eight slots per subframe, and 16 slots per subframe, respectively. Each slot may include a number (e.g., quantity) of symbols (e.g., OFDM symbols) . In some implementations, the number (e.g., quantity) of slots for a subframe may depend on a numerology. For a normal cyclic prefix, a slot may include 14 symbols. For an extended cyclic prefix (e.g., applicable for 60 kHz subcarrier spacing) , a slot may include 12 symbols. The relationship between the number of symbols per slot, the number of slots per subframe, and the number of slots per frame for a normal cyclic prefix and an extended cyclic prefix may depend on a numerology. It should be understood that reference to a first numerology (e.g., μ=0) associated with a first subcarrier spacing (e.g., 15 kHz) may be used interchangeably between subframes and slots.

In the wireless communications system 100, an electromagnetic (EM) spectrum may be split, based on frequency or wavelength, into various classes, frequency bands, frequency channels, etc. By way of example, the wireless communications system 100 may support one or multiple operating frequency bands, such as frequency range designations FR1 (410 MHz –7.125 GHz) , FR2 (24.25 GHz –52.6 GHz) , FR3 (7.125 GHz –24.25 GHz) , FR4 (52.6 GHz –114.25 GHz) , FR4a or FR4-1 (52.6 GHz –71 GHz) , and FR5 (114.25 GHz –300 GHz) . In some implementations, the NEs 102 and the UEs 104 may perform wireless communications over one or more of the operating frequency bands. In some implementations, FR1 may be used by the NEs 102 and the UEs 104, among other equipment or devices for cellular communications traffic (e.g., control information, data) . In some implementations, FR2 may be used by the NEs 102 and the UEs 104, among other equipment or devices for short-range, high data rate capabilities.

FR1 may be associated with one or multiple numerologies (e.g., at least three numerologies) . For example, FR1 may be associated with a first numerology (e.g., μ=0) , which includes 15 kHz subcarrier spacing; a second numerology (e.g., μ=1) , which includes 30 kHz subcarrier spacing; and a third numerology (e.g., μ=2) , which includes 60 kHz subcarrier spacing. FR2 may be associated with one or multiple numerologies (e.g., at least 2 numerologies) . For example, FR2 may be associated with a third numerology (e.g., μ=2) , which includes 60 kHz subcarrier spacing; and a fourth numerology (e.g., μ=3) , which includes 120 kHz subcarrier spacing.

In M-DCI based M-TRP scenarios (or operations etc. ) , multiple TRPs, e.g., two TRPs are configured in an activated BWP of the serving cell. For example, there are multiple control resource set (CORESET) pool index values, e.g., configured by RRC, and each CORESET pool index value represents a TRP. On the other hand, based on the unified TCI state framework, each of multiple MAC CEs will activate one or multiple TCI states for M-DCI based M-TRP operations, e.g., two MAC CEs for two TRPs. Regarding a TCI state, it can be a joint TCI state or a DL TCI state or an UL TCI state under the unified TCI state framework. An indicated TCI state of all the activated TCI states is a TCI state indicated to be applicable from a time instance, which may also be referred to as an applicable TCI state. Other TCI state (s) of all the activated TCI states except from the indicated TCI state is non-indicated TCI state (s) .

In addition, in inter-cell M-DCI based M-TRP operations, multiple additional PCIs will be configured, e.g., by RRC for UE besides a serving cell PCI. Taking two TRPs as an example, only one additional PCI of the configured additional PCIs is activated which means the activated additional PCI is associated with at least one activated TCI state, and all the other additional PCIs of the configured additional PCIs except for the activated additional PCI are non-activated additional PCIs (or deactivated additional PCIs) . Similarly, in the case that there are more than two TRPs, more additional PCIs of the configured additional PCIs may be activated, wherein, each activated additional PCI associated with at least one activated TCI state is one to one associated with a corresponding TRP.

In the case that TRP-specific BFR is configured, e.g., for inter-cell M-DCI based M-TRP, multiple BFD-RS sets will be configured for multiple TRPs, wherein, each BFD-RS set is one to one associated with a TRP, e.g., associated with a configured CORESET pool index value. Since one BFD-RS set associated with one TRP is associated with one indicated joint or DL TCI state associated with the TRP, one BFD-RS set is associated with an activated additional PCI in the case that the indicated TCI state (s) associated with the BFD-RS set is associated with the activated additional PCI.

Still taking two TRPs as an example, two BFD-RS sets will be configured in view of TRP-specific BFR, wherein, one of the two BFD-RS sets is associated with one TRP which is associated with a serving cell PCI, and the other of the two BFD-RS sets is associated with the other TRP which is associated with an activated additional PCI. It is similar in the case that there are more than two TRPs.

Moreover, in the case that TRP-specific BFR is configured, e.g., for inter-cell M-DCI based M-TRP, multiple NBI-RS sets associated with multiple BFD-RS sets will be configured. 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 in view of TRP-specific BFR, wherein one of the at least two NBI-RS sets is associated with the BFD-RS set which is associated with the serving cell PCI, e.g., identical or similar to that specified in legacy 3GPP specifications, and other (s) of the at least two NBI-RS sets are associated with the BFD-RS set which is associated with the activated additional PCI. It is similar in the case that there are more than two TRPs.

Regarding NBI-RS set (s) associated with a BFD-RS set which is associated with an activated additional PCI, it is configured differently from the legacy. In legacy 3GPP specification, only RSs, e.g., SSBs associated with an activated additional PCI which is associated with at least one activated TCI state can be configured in a NBI-RS set one to one associated with a BFD-RS set which is associated the activated additional PCI. However, in accordance with some aspects of the present disclosure, RSs associated with non-activated additional PCIs can be configured in a NBI-RS set associated with a BFD-RS set associated with an activated additional PCI. That is, a BFD-RS set which is associated with the activated additional PCI will be associated with RSs associated with non-activated additional PCIs. An exemplary RS associated with non-activated additional PCI is a CSI-RS or SSB etc. The non-activated additional PCI (s) associated with the RS (s) in the NBI-RS set associated with a BFD-RS set associated with an activated additional PCI is one or more of the configured non-activated additional PCIs.

The RSs associated with non-activated additional PCI (s) configured for the BFD-RS set which is associated with the activated additional PCI will impact the uplink transmission (or uplink reception) . For example, when performing uplink transmission in the UE or performing uplink reception in the network side, the following will be considered: any RS associated with non-activated additional PCI configured for the BFD-RS set associated with the activated additional PCI is considered as invalid symbols for PUSCH repetition type B; an uplink transmission will be dropped in the case that the uplink transmission is overlapped with a RS associated with non-activated additional PCI configured for the BFD-RS set associated with the activated additional PCI in time domain; symbols of a RS associated with non-activated additional PCI 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 of a RS associated with non-activated additional PCIs are not expected to be indicated as uplink symbols by TDD-UL-DL common configuration, or TDD-UL-DL dedicated configuration.

In addition, the impact on the uplink transmission (and uplink reception) also involves determination of slots for a PUCCH transmission with repetitions for unpaired spectrum. For example, in the case that RSs associated with non-activated additional PCI (s) configured in the NBI-RS set associated with the BFD-RS set which is associated the activated additional PCI are SSB, determination of slots for a PUCCH transmission with repetitions for unpaired spectrum will exclude flexible symbols that are SSB symbols, starting from a first symbol provided by a starting symbol index, equal to or larger than a number of symbols of the RSs associated with non-activated additional PCI (s) .

Since the RSs associated with non-activated additional PCI (s) in the NBI-RS set will impact the uplink transmission, there are restrictions on the the maximum number of RSs associated with non-activated additional PCIs in the NBI-RS set or the maximum number of non-activated additional PCIs associated with the NBI-RS set. For example, for a NBI-RS set associated with a BFD-RS set associated with an activated additional PCI includes at least RSs associated with non-activated additional PCIs, the maximum number of RSs associated with non-activated additional PCIs in the NBI-RS set or the maximum number of non-activated additional PCIs associated with the NBI-RS set depends on the capability of the UE.

Two exemplary configuration manners of NBI-RS set (s) associated with a BFD-RS set associated with an activated additional PCI are illustrated in detail in the following. Hereafter, for simplification and clearness, a BFD-RS set which is associated with a serving cell may also be referred to as a first BFD-RS set, and a BFD-RS set which is associated with an activated additional PCI may also be referred to as a second BFD-RS set.

In some implementations of the present disclosure (Scheme 1) , similar to legacy, BFD-RS sets and NBI-RS sets are one to one associated. That is, one NBI-RS set is associated with a BFD-RS set associated with the activated additional PCI, e.g., a second NBI-RS set is associated with associated with the second BFD-RS set associated with the 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 non-activated additional PCI (s) , or a combination of RSs associated with the activated additional PCI and RSs associated with non-activated additional PCI (s) , or only RSs associated with non-activated additional PCI (s) , or a combination of the RSs associated with the serving cell PCI and RSs associated with the activated additional PCI and RSs associated with non-activated additional PCI (s) .

It is assumed that the RSs associated with non-activated additional PCI (s) are SSB in some implementations of the present disclosure. Then, the SSBs associated with non-activated additional PCI (s) configured in the NBI-RS set associated with the second BFD-RS set will impact the uplink transmission as follows:

any SSB associated with any non-activated additional PCI in the NBI-RS set is considered as invalid symbols for PUSCH repetition Type B;

an uplink transmission is dropped if it is overlapped with a SSB associated with any non-activated additional PCI in the NBI-RS set in time domain;

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

symbols of SSBs associated with any non-activated additional PCI in the NBI-RS set are not expected to be indicated as uplink symbols by tdd-UL-DL-ConfigurationCommon, or tdd-UL-DL-ConfigurationDedicated; and

any SSB associated with any non-activated additional PCI in the NBI-RS set is considered for determination of slots for a PUCCH transmission with repetitions for unpaired spectrum.

Exemplary determination of slots for a PUCCH transmission with repetitions for unpaired spectrum based on legacy 3GPP specification TS38.213 is shown below considering the impact from SSBs associated with any non-activated additional PCI in the NBI-RS set:

A SSB symbol is a symbol of an SS/PBCH block with candidate SS/PBCH block index corresponding to the SS/PBCH block index indicated to a UE by ssb-PositionsInBurst in SIB1 or ssb-PositionsInBurst in ServingCellConfigCommon or by NonCellDefiningSSB if provided or, if the UE is not provided dl-OrJoint-TCIStateList, by ssb-PositionsInBurst in SSB-MTCAdditionalPCI associated to physical cell ID with active TCI states for PDCCH or PDSCH, or for a set of symbols of a slot corresponding to SS/PBCH blocks configured for L1 beam measurement/reporting, or for a set of symbols of a slot corresponding to SS/PBCH blocks associated with any physical cell ID configured in SSB-MTCAdditionalPCI and configured in NBI-RS set which is not associated with active TCI states for PDCCH or PDSCH configured in a candidateBeamRSList.

For unpaired spectrum, the UE determines theslots for a PUCCH transmissionstarting from a slot indicated to the UE as described in clause 9.2.3 for HARQ-ACK reporting, or a slot determined as described in clause 9.2.4 for SR reporting or in clause 5.2.1.4 of [6, TS 38.214] for CSI reporting and having

- an UL symbol, as described in clause 11.1, or flexible symbol that is not SS/PBCH block symbol provided by startingSymbolIndex as a first symbol, and

- consecutive UL symbols, as described in clause 11.1, or flexible symbols that are not SS/PBCH block symbols, starting from the first symbol, equal to or larger than a number of symbols provided by nrofsymbols.

Similar to legacy TRP-specific BFR, in the case that there is at least one RS whose L1-RSRP is larger than or equal to a BFR threshold in the NBI-RS set, UE will report a new beam in a BFR MAC CE which is a RS of the at least one RS whose L1-RSRP is larger than or equal to the BFR threshold when the associated BFD-RS set is detected as beam failure. The RS reported as a new beam is a RS associated with a non-activated additional PCI or not. In the case that L1-RSRP of all RSs in the NBI-RS set are less than the BFR threshold, e.g., Q_in, _LR configured for TRP-specific BFR as specified in legacy 3GPP specification, UE will report an indicator which indicates that no new beam is reported in the BFR MAC CE.

In some other implementations of the present disclosure (Scheme 2) , for a TRP-specific BFD-RS set associated with an activated additional PCI, e.g., the second BFD-RS set, it will be associated with two NBI-RS sets. For example, besides a NBI-RS set configured for the BFD-RS set associated with an activated additional PCI similar to legacy (or referred to as a second NBI-RS set in Scheme 2) , an additional NBI-RS set is also configured for the BFD-RS set associated with an activated additional PCI (or referred to as a third NBI-RS set in Scheme 2) . Taking two TRPs as an example, for TRP-specific BFR, e.g., in inter-cell M-DCI M-TRP operations, a third NBI-RS set, e.g., represented by q_1, ₂ will be configured in addition to a first NBI-RS set associated with a first BFD-RS set associated with the serving cell PCI and a second NBI-RS set associated with a second BFD-RS set associated with an activated additional PCI, e.g., represented by q_1, ₀ and q_1, ₁ as legacy, wherein the third NBI-RS set is also associated with the second BFD-RS set. The additional or the third NBI-RS set can be updated, e.g., by RRC reconfiguration or MAC CE updating from the network side.

An exemplary second NBI-RS set includes RSs associated with the serving cell PCI, RSs associated with the activated additional PCI, or a combination thereof. An exemplary third NBI-RS set includes RSs associated with non-activated additional PCI (s) .

Similarly, it is assumed that the RSs associated with non-activated additional PCI(s) are SSB in some implementations of the present disclosure. Then, the SSBs associated with non-activated additional PCI (s) configured in the additional NBI-RS set will impact the uplink transmission as follows:

any SSB in the additional NBI-RS set is considered as invalid symbols for PUSCH repetition Type B;

an uplink transmission is dropped if it is overlapped with any SSB in the additional NBI-RS set in time domain;

symbols of SSBs in the additional NBI-RS set is not expected to be indicated as uplink symbols by DCI format 2_0;

symbols of SSBs in the additional NBI-RS set is not expected to be indicated as uplink symbols by tdd-UL-DL-ConfigurationCommon, or tdd-UL-DL-ConfigurationDedicated; and

any SSB in the additional NBI-RS set is considered for determination of slots for a PUCCH transmission with repetitions for unpaired spectrum.

Exemplary determination of slots for a PUCCH transmission with repetitions for unpaired spectrum based on legacy 3GPP specification TS38.213 is shown below considering the impact from SSBs associated with any non-activated additional PCI in the additional NBI-RS set:

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

For unpaired spectrum, the UE determines theslots for a PUCCH transmission starting from a slot indicated to the UE as described in clause 9.2.3 for HARQ-ACK reporting, or a slot determined as described in clause 9.2.4 for SR reporting or in clause 5.2.1.4 of [6, TS 38.214] for CSI reporting and having

Measurements of the RSs in the additional NBI-RS set will be triggered in the case that the BFD-RS set associated with the activated additional PCI is detected as beam failure (also referred to as a 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 an activated additional PCI (e.g., the L1-RSRP of all RSs in the second NBI-RS set is less than a threshold configured for TRP-specific BFR, e.g., Q_in, _LR) . If there is at least one RS whose L1-RSRP is larger than or equal to the BFR threshold, e.g., Q_in, _LR from the additional NBI-RS set, then a new beam which is a SSB associated with a non-activated additional PCI selected from the at least one RS will be reported in the BFR MAC CE for TRP-specific BFR. If no new beam can be found in the additional NBI-RS set, e.g., the L1-RSRP of all RSs in the additional NBI-RS set is less than the threshold, then UE will transmit an indicator to the network side, e.g., to a gNB, which indicates that no new beam is reported in the BFR MAC CE.

Since the new beam corresponding to a failed BFD-RS set associated with an activated additional PCI in the TRP-specific BFR may be selected from 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 from which NBI-RS set the new beam (or the RS used as the new beam) comes. The maximum number of RSs in the first NBI-RS set, the second NBI-RS set and the third NBI-RS set are the same or different. In order to keep the bit width of new beam unchanged, the maximum number of RSs in each NBI-RS set is identical, e g., being 64. In addition, an indicator in a field of the BFR MAC CE, which is used to indicate from which NBI-RS set the new beam comes, is valid in the case that the field corresponds to a serving cell for which a field indicating beam failure detection is set to 1 and is configured with two BFD-RS sets (or more in the case that there are more than two TRPs) where one of the two BFD-RS sets is associated with the activated additional PCI.

Figure 2 is an example of a BFR MAC CE in accordance with aspects of the present disclosure, which is an exemplary design of enhancement of MAC CEs corresponding to enhanced BFR MAC CEs in Figure 6.1.3.43-1 in TS 38.321.

Referring to Figure 2, there is one oct including 8 F_i fields (corresponding to the indicator which is used to indicate from which NBI-RS set the new beam comes) , where each F_i field indicates the Candidate RS ID filed (indicating the new beam) of a ID field (indicating a BFD-RS set) which is associated with an activated additional PCI is from the NBI-RS set (the second NBI-RS set) associated with the ID or the additional NBI-RS set. For example, F_i set as ‘0’ means a candidate RS ID for a BFD-RS set (indicated by the ID field in the MAC CE) is from the NBI-RS set (the second NBI-RS set) associated with the BFD-RS set, and F_i set as ‘1’ means a candidate RS ID for a BFD-RS set (indicated by the ID filed in the MAC CE) is from the additional NBI-RS set associated with the BFD-RS set. F_i is valid only if this field corresponds to the i^th serving cell for which the corresponding SP or C_i field is set to 1 and is configured with two BFD-RS sets where one of the two BFD-RS set is associated with an activated additional PCI. For other fields in the MAC CE in Figure 2, they are the same to the fields in the MAC CE in Figure 6.1.3.43-1 in TS 38.321, and thus will not repeat.

Figure 3 is another example of a BFR MAC CE in accordance with aspects of the present disclosure, which is an exemplary design of enhancement of MAC CEs corresponding to enhanced BFR MAC CEs in Figure 6.1.3.43-2 in TS 38.321.

Referring to Figure 3, there are four octs including 32 F_i fields (each corresponding to an indicator which is used to indicate from which NBI-RS set the new beam comes) , where each indicates the Candidate RS ID filed (indicating the new beam) of a ID field (indicating a BFD-RS set) which is associated with an activated additional PCI is from the NBI-RS set (the second NBI-RS set) associated with the ID or the additional NBI-RS set. For example, F_i set as ‘0’ means a candidate RS ID for a BFD-RS set (indicated by the ID filed in the MAC CE) is from the NBI-RS set (the second NBI-RS set) associated with the BFD-RS set, and F_i set as ‘1’ means a candidate RS ID for a BFD-RS set (indicated by the ID filed in the MAC CE) is from the additional NBI-RS set associated with the BFD-RS set. Similarly, F_i is valid only if this field corresponds to the i^th serving cell for which the corresponding SP or Ci field is set to 1 and is configured with two BFD-RS sets where one of the two BFD-RS set is associated with an activated additional PCI. For other fields in the MAC CE in Figure 3, they are the same as the fields in the MAC CE in Figure 6.1.3.43-2 in TS 38.321, and thus will not repeat.

In the case that a RS associated with non-activated additional PCI is reported as a new beam associated with the BFD-RS set associated with the activated additional PCI, UE (consistently in 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, wherein, the new activated additional PCI is the additional PCI associated with the RS reported as the new beam. For example, after a number of symbols, e.g., 28 symbols from a last symbol of a PDCCH reception with a DCI format scheduling a PUSCH transmission with the same HARQ process number as for transmission of the first PUSCH carrying the MAC CE indicating the new beam and having a toggled NDI field value, the new beam will be applied in the UE, and the activated additional PCI will be switched.

Aspects of the present disclosure also consider UE behaviors after switching the activated additional PCI to the new activated additional PCI which is an additional PCI associated with the RS reported as the new beam.

For example, in some implementations of the present disclosure, UE will exclude all RSs associated with the new activated additional PCI from the NBI-RS set including RSs associated with non-activated additional PCIs.

Taking SSB as an example of RSs associated with non-activated additional PCIs, if a SSB associated with an additional PCI in the additional NBI-RS set is reported in the BFR MAC CE, and it is confirmed after 28 symbols from a last symbol of a PDCCH reception with a DCI format scheduling a PUSCH transmission with the same HARQ process number as for the transmission of the first PUSCH carrying the BFR MAC CE and having a toggled NDI field value, then all the 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 after 28 symbols from the last symbol of a PDCCH reception with a DCI format scheduling a PUSCH transmission with the same HARQ process number as for the transmission of the first PUSCH carrying the BFR MAC CE and having a toggled NDI field value, because the activated additional PCI is updated as the additional PCI where the SSB reported in the BFR MAC CE is associated.

In some implementations of the present disclosure, UE will treat RSs indicated by a parameter as ssb-PositionsInBurst in SSB-MTC-AdditionalPCI associated with the new activated additional PCI as RSs associated with the new activated additional PCI before a MAC CE to activate TCI states for a TRP associated with the BFD-RS set associated with the new activated additional PCI.

UL transmission or DL transmission will be performed according to one or more of the following: any RS indicated by the parameter as ssb-PositionsInBurst in SSB-MTC-AdditionalPCI associated with the new activated additional PCI is considered as invalid symbols for PUSCH repetition type B; an uplink transmission is dropped in the case that the uplink transmission is overlapped with any RS indicated by the parameter as ssb-PositionsInBurst in SSB-MTC-AdditionalPCI associated with the new activated additional PCI in time domain; symbols of the RSs indicated by the parameter as ssb-PositionsInBurst in SSB-MTC-AdditionalPCI associated with the new activated additional PCI are not expected to be indicated as uplink symbols by DCI format 2_0; symbols of the RSs indicated by the parameter as ssb-PositionsInBurst in SSB-MTC-AdditionalPCI associated with the new activated additional PCI are not expected to be indicated as uplink by TDD-UL-DL common configuration, or TDD-UL-DL dedicated configuration; and the UE is not required to monitor a PDCCH candidate in the case that a beam of the PDCCH is updated as the new beam and at least one RE for the PDCCH candidate overlaps with at least one RE of a candidate RS corresponding to a RS index indicated by the parameter as ssb-PositionsInBurst in SSB-MTC-AdditionalPCI associated with the new activated additional PCI.

Still taking SSB as an example of RSs associated with non-activated additional PCIs, in the case that a new beam which is a SSB associated with a non-activated additional PCI associated with a BFD-RS set which is associated with a CORESET pool index value, it is confirmed after 28 symbols from the last symbol of a PDCCH reception with a DCI format scheduling a PUSCH transmission with the same HARQ process number as for the transmission of the first PUSCH carrying the BFR MAC CE and having a toggled NDI field value, then quasi co-location (QCL) assumption and/or spatial transmitting (Tx) filter and/or pathloss (PL) -RS for channel (s) and/or signal (s) that applies the indicated joint and/or DL and/or UL TCI state specific to the CORSET pool index value are updated according to the new beam corresponding to the BFD-RS set. It means the activated additional PCI is updated to the additional PCI associated with the new beam (the SSB reported in the BFR MAC CE) . Before a MAC CE to activate TCI states for the TRP identified by the CORESET pool index value, ssb-PositionsInBurst in SSB-MTC-AdditionalPCI associated with the additional PCI associated with the new beam will be treated as SSBs associated with an activated additional PCI.

Therefore, after 28 symbols from the last symbol of a PDCCH reception with a DCI format scheduling a PUSCH transmission with the same HARQ process number as for the transmission of the first PUSCH carrying the BFR MAC CE indicating a new beam which is a SSB associated with an additional PCI which is not associated with any activated TCI states and having a toggled NDI field value, then UE will behave as the following:

any SSB in ssb-PositionsInBurst in SSB-MTC-AdditionalPCI associated to PCI associated with the SSB (the new beam) is considered as invalid symbols for PUSCH repetition type B;

an uplink transmission is dropped if it is overlapped with any SSB in ssb-PositionsInBurst in SSB-MTC-AdditionalPCI associated to PCI associated with the SSB (the new beam) in time domain;

symbols of SSBs in ssb-PositionsInBurst in SSB-MTC-AdditionalPCI associated to PCI associated with the SSB (the new beam) are not expected to be indicated as uplink symbols by DCI format 2_0;

symbols of SSBs in ssb-PositionsInBurst in SSB-MTC-AdditionalPCI associated to PCI associated with the SSB (the new beam) are not expected to be indicated as uplink by tdd-UL-DL-ConfigurationCommon, or tdd-UL-DL-ConfigurationDedicated;

UE is not required to monitor a PDCCH candidate if its beam is updated as the new beam (the SSB) and at least one RE for the PDCCH candidate overlaps with at least one RE of a candidate SSB corresponding to a SSB index provided by ssb-PositionsInBurst in SSB-MTC-AdditionalPCI associated to PCI associated with the SSB (the new beam) ; and

any SSB in ssb-PositionsInBurst in SSB-MTC-AdditionalPCI associated to PCI associated with the SSB (the new beam) is considered for determination of slots for a PUCCH transmission with repetitions for unpaired spectrum.

Considering the impact of switching the activated additional PCI as recited above, regarding the impact on that UE is not required to monitor a PDCCH candidate, the corresponding part in the legacy 3GPP specification TS38.213 may be updated to be the following or the like:

For monitoring of a PDCCH candidate by a UE, if the UE

- has received ssb-PositionsInBurst in SSB-MTCAdditionalPCI for a serving cell, and

- at least one RE for a PDCCH candidate overlaps with at least one RE of a candidate SS/PBCH block corresponding to a SS/PBCH block index provided by ssb-PositionsInBurst in SSB-MTCAdditionalPCI with same physical cell identity as the one associated with the new beam,

the UE is not required to monitor the PDCCH candidate.

Considering the impact of switching the activated additional PCI as recited above, exemplary determination of slots for a PUCCH transmission with repetitions for unpaired spectrum based on legacy 3GPP specification TS38.213 is shown below:

A SS/PBCH block symbol is a symbol of an SS/PBCH block with candidate SS/PBCH block index corresponding to the SS/PBCH block index indicated to a UE by ssb-PositionsInBurst in SIB1 or ssb-PositionsInBurst in ServingCellConfigCommon or by NonCellDefiningSSB if provided or, if the UE is not provided dl-OrJoint-TCIStateList, by ssb-PositionsInBurst in SSB-MTCAdditionalPCI associated to physical cell ID with active TCI states for PDCCH or PDSCH, or for a set of symbols of a slot corresponding to SS/PBCH blocks configured for L1 beam measurement/reporting, or by ssb-PositionsInBurst in SSB-MTCAdditionalPCI associated to physical cell ID associated with the new beam.

Figure 4 illustrates an example of a UE 400 in accordance with aspects of the present disclosure. The UE 400 may include a processor 402, a memory 404, a controller 406, and a transceiver 408. The processor 402, the memory 404, the controller 406, or the transceiver 408, or various combinations thereof or various components thereof may be examples of means for performing various aspects of the present disclosure as described herein. These components may be coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more interfaces.

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

The processor 402 may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, an ASIC, an FPGA, or any combination thereof) . In some implementations, the processor 402 may be configured to operate the memory 404. In some other implementations, the memory 404 may be integrated into the processor 402. The processor 402 may be configured to execute computer-readable instructions stored in the memory 404 to cause the UE 400 to perform various functions of the present disclosure.

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

In some implementations, the processor 402 and the memory 404 coupled with the processor 402 may be configured to cause the UE 400 to perform one or more of the functions described herein (e.g., executing, by the processor 402, instructions stored in the memory 404) . For example, the processor 402 may support wireless communication at the UE 400 in accordance with examples as disclosed herein. The UE 400 may be configured to support a 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 activated additional PCI associated with at least one activated TCI state and one or more non-activated additional PCIs; a 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 activated additional PCI, wherein the second BFD-RS set is further associated with RSs associated with at least one of the one or more non-activated additional PCIs; and a means for performing uplink transmission based on the first configuration information and the second configuration information.

The controller 406 may manage input and output signals for the UE 400. The controller 406 may also manage peripherals not integrated into the UE 400. In some implementations, the controller 406 may utilize an operating system such as or other operating systems. In some implementations, the controller 406 may be implemented as part of the processor 402.

In some implementations, the UE 400 may include at least one transceiver 408. In some other implementations, the UE 400 may have more than one transceiver 408. The transceiver 408 may represent a wireless transceiver. The transceiver 408 may include one or more receiver chains 410, one or more transmitter chains 412, or a combination thereof.

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

A transmitter chain 412 may be configured to generate and transmit signals (e.g., control information, data, packets) . The 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) . The 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 the wireless medium. The transmitter chain 412 may also include one or more antennas for transmitting the amplified signal into the air or wireless medium.

Figure 5 illustrates an example of a processor 500 in accordance with aspects of the present disclosure. The processor 500 may be an example of a processor configured to perform various operations in accordance with examples as described herein. The processor 500 may include a controller 502 configured to perform various operations in accordance with examples as described herein. The processor 500 may optionally include at least one memory 504, which may be, for example, an L1/L2/L3 cache. Additionally, or alternatively, the processor 500 may optionally include one or more arithmetic-logic units (ALUs) 506. One or more of these components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more interfaces (e.g., buses) .

The processor 500 may be a processor chipset and include a protocol stack (e.g., a software stack) executed by the processor chipset to perform various operations (e.g., receiving, obtaining, retrieving, transmitting, outputting, forwarding, storing, determining, identifying, accessing, writing, reading) in accordance with examples as described herein. The processor chipset may include one or more cores, one or more caches (e.g., memory local to or included in the processor chipset (e.g., the processor 500) 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) .

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

The controller 502 may be configured to fetch (e.g., obtain, retrieve, receive) instructions from the memory 504 and determine subsequent instruction (s) to be executed to cause the processor 500 to support various operations in accordance with examples as described herein. The controller 502 may be configured to track memory address of instructions associated with the memory 504. The controller 502 may be configured to decode instructions to determine the operation to be performed and the operands involved. For example, the controller 502 may be configured to interpret the instruction and determine control signals to be output to other components of the processor 500 to cause the processor 500 to support various operations in accordance with examples as described herein. Additionally, or alternatively, the controller 502 may be configured to manage flow of data within the processor 500. The controller 502 may be configured to control transfer of data between registers, arithmetic logic units (ALUs) , and other functional units of the processor 500.

The memory 504 may include one or more caches (e.g., memory local to or included in the processor 500 or other memory, such RAM, ROM, DRAM, SDRAM, SRAM, MRAM, flash memory, etc. In some implementations, the memory 504 may reside within or on a processor chipset (e.g., local to the processor 500) . In some other implementations, the memory 504 may reside external to the processor chipset (e.g., remote to the processor 500) .

The memory 504 may store computer-readable, computer-executable code including instructions that, when executed by the processor 500, cause the processor 500 to perform 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. The controller 502 and/or the processor 500 may be configured to execute computer-readable instructions stored in the memory 504 to cause the processor 500 to perform various functions. For example, the processor 500 and/or the controller 502 may be coupled with or to the memory 504, the processor 500, the controller 502, and the memory 504 may be configured to perform various functions described herein. In some examples, the processor 500 may include multiple processors and the memory 504 may include multiple memories. One or more of the multiple processors may be coupled with one or more of the multiple memories, which may, individually or collectively, be configured to perform various functions herein.

The one or more ALUs 506 may be configured to support various operations in accordance with examples as described herein. In some implementations, the one or more ALUs 506 may reside within or on a processor chipset (e.g., the processor 500) . In some other implementations, the one or more ALUs 506 may reside external to the processor chipset (e.g., the processor 500) . One or more ALUs 506 may perform one or more computations such as addition, subtraction, multiplication, and division on data. For example, one or more ALUs 506 may receive input operands and an operation code, which determines an operation to be executed. One or more ALUs 506 be configured with a variety of logical and arithmetic circuits, including adders, subtractors, shifters, and logic gates, to process and manipulate the data according to the operation. Additionally, or alternatively, the one or more ALUs 506 may support logical operations such as AND, OR, exclusive-OR (XOR) , not-OR (NOR) , and not-AND (NAND) , enabling the one or more ALUs 506 to handle conditional operations, comparisons, and bitwise operations.

The processor 500 may support wireless communication in accordance with examples as disclosed herein. The processor 500 may be configured to or operable to support a means for a 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 activated additional PCI associated with at least one activated TCI state and one or more non-activated additional PCIs; a 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 activated additional PCI, wherein the second BFD-RS set is further associated with RSs associated with at least one of the one or more non-activated additional PCIs; and a means for performing uplink transmission based on the first configuration information and the second configuration information.

Figure 6 illustrates an example of a NE 600 in accordance with aspects of the present disclosure. The NE 600 may include a processor 602, a memory 604, a controller 606, and a transceiver 608. The processor 602, the memory 604, the controller 606, or the transceiver 608, or various combinations thereof or various components thereof may be examples of means for performing various aspects of the present disclosure as described herein. These components may be coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more interfaces.

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

The processor 602 may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, an ASIC, an FPGA, or any combination thereof) . In some implementations, the processor 602 may be configured to operate the memory 604. In some other implementations, the memory 604 may be integrated into the processor 602. The processor 602 may be configured to execute computer-readable instructions stored in the memory 604 to cause the NE 600 to perform various functions of the present disclosure.

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

In some implementations, the processor 602 and the memory 604 coupled with the processor 602 may be configured to cause the NE 600 to perform one or more of the functions described herein (e.g., executing, by the processor 602, instructions stored in the memory 604) . For example, the processor 602 may support wireless communication at the NE 600 in accordance with examples as disclosed herein. The NE 600 may be configured to support a 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 activated additional PCI associated with at least one activated TCI state and one or more non-activated additional PCIs; a 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 activated additional PCI, wherein the second BFD-RS set is further associated with RSs associated with at least one of the one or more non-activated additional PCIs; and a means for performing uplink reception based on the first configuration information and the second configuration information.

The controller 606 may manage input and output signals for the NE 600. The controller 606 may also manage peripherals not integrated into the NE 600. In some implementations, the controller 606 may utilize an operating system such as or other operating systems. In some implementations, the controller 606 may be implemented as part of the processor 602.

In some implementations, the NE 600 may include at least one transceiver 608. In some other implementations, the NE 600 may have more than one transceiver 608. The transceiver 608 may represent a wireless transceiver. The transceiver 608 may include one or more receiver chains 610, one or more transmitter chains 612, or a combination thereof.

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

A transmitter chain 612 may be configured to generate and transmit signals (e.g., control information, data, packets) . The 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) . The 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 the wireless medium. The transmitter chain 612 may also include one or more antennas for transmitting the amplified signal into the air or wireless medium.

Figure 7 illustrates a flowchart of a method performed by a UE in accordance with aspects of the present disclosure. The operations of the method may be implemented by a UE as described herein. In some implementations, the UE may execute a set of instructions to control the function elements of the UE to perform the described functions.

At 701, the method 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. The operations of 701 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 701 may be performed by a UE as described with reference to Figure 4.

At 703, the method may include 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 RSs associated with at least one of the one or more non-activated additional PCIs. The operations of 703 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 703 may be performed by a UE as described with reference to Figure 4.

At 705, the method may include performing uplink transmission based on the first configuration information and the second configuration information. The operations of 705 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 705 may be performed a UE as described with reference to Figure 4.

It should be noted that the method described herein describes a possible implementation, and that the operations and the steps may be rearranged or otherwise modified and that other implementations are possible.

Figure 8 illustrates a flowchart of a method performed by a NE in accordance with aspects of the present disclosure. The operations of the method may be implemented by a NE as described herein. In some implementations, the NE may execute a set of instructions to control the function elements of the NE to perform the described functions.

At 801, the method may include transmitting 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. The operations of 801 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 801 may be performed by a NE as described with reference to Figure 6.

At 803, the method may include 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 activated additional PCI, wherein the second BFD-RS set is further associated with RSs associated with at least one of the one or more non-activated additional PCIs. The operations of 803 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 803 may be performed by a NE as described with reference to Figure 6.

At 805, the method may include performing uplink reception based on the first configuration information and the second configuration information. The operations of 805 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 805 may be performed a NE as described with reference to Figure 6.

The description herein is provided to enable a person having ordinary skill in the art to make or use the disclosure. Various modifications to the disclosure will be apparent to a person having ordinary skill in the art, and the generic principles defined herein may be applied to other variations without departing from the scope of the disclosure. Thus, the disclosure is not limited to the examples and designs described herein but is to be accorded the broadest scope consistent with the principles and novel features disclosed herein.

Claims

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 non-activated additional PCIs;

receive 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 activated additional PCI, wherein the second BFD-RS set is further associated with RSs associated with at least one of the one or more non-activated additional PCIs; and

perform uplink transmission based on the first configuration information and the second configuration information.
The UE of claim 1, wherein, the second BFD-RS set is associated with a new beam indicator (NBI) -RS set at least including the RSs associated with at least one of the one or more non-activated additional PCIs.
The UE of claim 2, wherein, a maximum number of RSs associated with non-activated additional PCIs in the NBI-RS set or a maximum number of non-activated additional PCIs associated with the NBI-RS set depends on capability of the UE.
The UE of claim 2, wherein, the at least one processor is configured to cause the UE to:

in the case that the second BFD-RS set is detected as beam failure and there is at least one RS whose layer (L) 1-reference signal receiving power (RSRP) is larger than or equal to a beam failure recovery threshold in the NBI-RS set, report a new beam in a media access control (MAC) control element (CE) which is a RS of the at least one RS whose L1-RSRP is larger than or equal to a beam failure recovery threshold; or

in the case that the second BFD-RS set is detected as beam failure and L1-RSRP of all RSs in the NBI-RS set are less than the beam failure recovery threshold, report an indicator which indicates that no new beam is reported in the MAC CE.
The UE of claim 1, wherein, the second BFD-RS set 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 PCI, or a combination thereof and a third NBI-RS set including the RSs associated with at least one of the one or more non-activated additional PCIs.
The UE of claim 5, wherein, a maximum number of RSs associated with non-activated additional PCIs in the third NBI-RS set or a maximum number of non-activated additional PCIs associated with the third NBI-RS set depends on capability of the UE.
The UE of claim 5, wherein, the first BFD-RS set 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 are same.
The UE of claim 5, wherein, the at least one processor is configured to cause the UE to measure RSs in the third NBI-RS set in the case that the second BFD-RS set is detected as beam failure and layer (L) 1-reference signal receiving power (RSRP) of all RSs in the second NBI-RS set is less than a beam failure recovery threshold.
The UE of claim 8, wherein, the at least one processor is configured to cause the UE to:

in the case that there is at least one RS whose L1-RSRP is larger than or equal to the beam failure recovery threshold in the third NBI-RS set, report a new beam in a media access control (MAC) control element (CE) which is a RS of the at least one RS whose L1-RSRP is larger than or equal to the beam failure recovery threshold; or

in the case that L1-RSRP of all RSs in the third NBI-RS set are less than the beam failure recovery threshold, report an indicator in the MAC CE which indicates that no new beam is reported.
The UE of claim 5, wherein, the at least one processor is configured to cause the UE to:

in the case of reporting a new beam in a media access control (MAC) control element (CE) which is a RS from the second NBI-RS set or the third NBI-RS set, report an indicator in a field of the MAC CE which indicates from which NBI-RS set the new beam is.
The UE of claim 1, wherein, in the case that a RS of the RSs associated with at least one of the one or more non-activated 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:

update the activated additional PCI to a new activated additional PCI after the new beam is applied in the UE, wherein the new activated additional PCI is an additional PCI associated with the RS reported as the new beam new beam.
The UE of claim 11, wherein, the at least one processor is configured to cause the UE to exclude all RSs associated with the new activated additional PCI from the RSs associated with at least one of the one or more non-activated additional PCIs.
The UE of claim 11, wherein, the at least one processor is configured to cause the UE to treat RSs indicated by a parameter as ssb-PositionsInBurst in SSB-MTC-AdditionalPCI associated with the new activated additional PCI as RSs associated with the new activated additional PCI before a media access control (MAC) control element (CE) to activate TCI states for a transmit-receive point (TRP) associated with the second BFD-RS set.
The UE of claim 13, wherein, the at least one processor is configured to cause the UE to perform the uplink transmission or downlink transmission according to one or more of the following:

any RS indicated by the parameter as ssb-PositionsInBurst in SSB-MTC-AdditionalPCI associated with the new activated additional PCI is considered as invalid symbols for physical uplink shared channel (PUSCH) repetition type B;

an uplink transmission is dropped in the case that the uplink transmission is overlapped with any RS indicated by the parameter as ssb-PositionsInBurst in SSB-MTC-AdditionalPCI associated with the new activated additional PCI in time domain;

symbols of the RSs indicated by the parameter as ssb-PositionsInBurst in SSB-MTC-AdditionalPCI associated with the new activated additional PCI are not expected to be indicated as uplink symbols by downlink control information (DCI) format 2_0;

symbols of the RSs indicated by the parameter as ssb-PositionsInBurst in SSB-MTC-AdditionalPCI associated with the new activated additional PCI are not expected to be indicated as uplink by time division duplexing (TDD) -uplink (UL) -downlink (DL) common configuration, or TDD-UL-DL dedicated configuration; and

the UE is not required to monitor a physical downlink control channel (PDCCH) candidate in the case that a beam of the PDCCH is updated as the new beam and at least one resource element (RE) for the PDCCH candidate overlaps with at least one RE of a candidate RS corresponding to a RS index indicated by the parameter as ssb-PositionsInBurst in SSB-MTC-AdditionalPCI associated with the new activated additional PCI.
The UE of claim 1, wherein, 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 of the RSs associated with at least one of the one or more non-activated additional PCIs is considered as invalid symbols for physical uplink shared channel (PUSCH) repetition type B;

an uplink transmission will be dropped in the case that the uplink transmission is overlapped with a RS of the RSs associated with at least one of the one or more non-activated additional PCIs in time domain;

symbols of the RS of the RSs associated with at least one of the one or more non-activated additional PCIs are not expected to be indicated as uplink symbols by downlink control information (DCI) format 2_0; and

symbols of RS of the RSs associated with at least one of the one or more non-activated additional PCIs are not expected to be indicated as uplink symbols by time division duplexing (TDD) -uplink (UL) -downlink (DL) common configuration, or TDD-UL-DL dedicated configuration.
The UE of claim 1, wherein, the RSs associated with at least one of the one or more non-activated additional PCIs is a channel state information (CSI) -RS or synchronization signal (SS) /physical broadcast channel (PBCH) block (SSB) .
The UE of claim 16, wherein, the RSs associated with at least one of the one or more non-activated additional PCIs are SSB, and the at least one processor is configured to cause the UE to perform the uplink transmission according to the following:

determination of slots for a physical pink control channel (PUCCH) transmission with repetitions for unpaired spectrum will exclude flexible symbols that are SSB symbols, starting from a first symbol provided by a starting symbol index, equal to or larger than a number of symbols of the RSs associated with at least one of the one or more non-activated additional PCIs.
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 non-activated additional PCIs;

receive 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 activated additional PCI, wherein the second BFD-RS set is further associated with RSs associated with at least one of the one or more non-activated additional PCIs; and

perform uplink transmission based on the first configuration information and the second configuration information.
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 non-activated additional PCIs;

transmit 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 activated additional PCI, wherein the second BFD-RS set is further associated with RSs associated with at least one of the one or more non-activated additional PCIs; and

perform uplink reception based on the first configuration information and the second configuration information.
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 non-activated additional PCIs;

receiving 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 activated additional PCI, wherein the second BFD-RS set is further associated with RSs 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.