WO2024239695A1

WO2024239695A1 - Method and apparatus of supporting uplink transmissions

Info

Publication number: WO2024239695A1
Application number: PCT/CN2024/073637
Authority: WO
Inventors: Wei Ling; Chenxi Zhu; Bingchao LIU
Original assignee: Lenovo Beijing Ltd
Current assignee: Lenovo Beijing Ltd
Priority date: 2024-01-23
Filing date: 2024-01-23
Publication date: 2024-11-28
Anticipated expiration: 2026-07-23

Abstract

Various aspects of the present disclosure relate to a method and apparatus of supporting uplink transmissions. An exemplary method performed by a UE includes: determining one indicated DL TCI state for DL receptions and multiple indicated UL TCI states for UL transmissions in an activated BWP of a serving cell; reporting a DL RS in response to a beam failure; and in response to reporting the DL RS, determining a spatial domain filter and power control parameters for a UL transmission associated with at least one indicated UL TCI state of the multiple indicated UL TCI states before the beam failure based on the at least one indicated UL TCI state and the reported DL RS.

Description

METHOD AND APPARATUS OF SUPPORTING UPLINK TRANSMISSIONS

TECHNICAL FIELD

The present disclosure relates to wireless communications, and more specifically to technologies of supporting uplink transmissions.

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 includes: at least one memory; and at least one processor coupled with the at least one memory and configured to cause the UE to:determine one indicated downlink (DL) transmission configuration indication (TCI) state for DL receptions and multiple indicated uplink (UL) TCI states for UL transmissions in an activated bandwidth part (BWP) of a serving cell; report a DL reference signal (RS) in response to a beam failure; and in response to reporting the DL RS, determine a spatial domain filter and power control parameters for a UL transmission associated with at least one indicated UL TCI state of the multiple indicated UL TCI states before the beam failure based on the at least one indicated UL TCI state and the reported DL RS.

In some implementations of the methods and apparatuses described herein, determining the spatial domain filter and power control parameters for the UL transmission associated with the at least one indicated UL TCI state before the beam failure includes: determining the spatial domain filter for the UL transmission associated with the at least one indicated UL TCI state before the beam failure to be that associated with the reported DL RS; determining pathloss RS of the power control parameters for the UL transmission associated with the at least one indicated UL TCI state before the beam failure to be that associated with the reported DL RS; and determining other power control parameters of the power control parameters to be default ones.

In some implementations of the methods and apparatuses described herein, the at least one indicated UL TCI state is a first indicated UL TCI state of the multiple indicated UL TCI states.

In some implementations of the methods and apparatuses described herein, determining the spatial domain filter and power control parameters for the UL transmission associated with the at least one indicated UL TCI state before the beam failure includes: determine the spatial domain filter and the power control parameters for the UL transmission associated with the at least one indicated UL TCI state before the beam failure to be same as those of the at least one indicated UL TCI state.

In some implementations of the methods and apparatuses described herein, determining the spatial domain filter and power control parameters for the UL transmission associated with the at least one indicated UL TCI state before the beam failure includes: determining the spatial domain filter for the UL transmission associated with the at least one indicated UL TCI state to be same as that of the at least one indicated UL TCI state; determining pathloss RS of the power control parameters for the UL transmission associated with the at least one indicated UL TCI state before the beam failure to be that associated with the reported DL RS; and determining other power control parameters of the power control parameters for the UL transmission associated with the at least one indicated UL TCI state before the beam failure to be same as those of the at least one indicated UL TCI state.

In some implementations of the methods and apparatuses described herein, determining the spatial domain filter and power control parameters for the UL transmission associated with the at least one indicated UL TCI state before the beam failure includes: determining the spatial domain filter for the UL transmission associated with the at least one indicated UL TCI state to be same as that of the at least one indicated UL TCI state; determining pathloss RS of the power control parameters for the UL transmission associated with the at least one indicated UL TCI state before the beam failure to be that associated with the reported DL RS; and determining other power control parameters of the power control parameters to be default ones.

In some implementations of the methods and apparatuses described herein, the at least one indicated UL TCI state is a second indicated UL TCI state of the multiple indicated UL TCI states.

In some implementations of the methods and apparatuses described herein, an indicated UL TCI state of the at least one indicated UL TCI state is any one of the multiple indicated UL TCI states.

In some implementations of the methods and apparatuses described herein, the at least one processor is configured to cause the UE to determine the spatial domain filter and the power control parameters based on a radio resource control (RRC) signaling.

Some implementations of the methods and apparatuses described herein may further include a processor for wireless communication, which includes: at least one controller coupled with at least one memory and configured to cause the processor to: determine one indicated DL TCI state for DL receptions and multiple indicated UL TCI states for UL transmissions in an activated BWP of a serving cell; report a DL RS in response to a beam failure; and in response to reporting the DL RS, determine a spatial domain filter and power control parameters for a UL transmission associated with at least one indicated UL TCI state of the multiple indicated UL TCI states before the beam failure based on the at least one indicated UL TCI state and the reported DL RS.

Some implementations of the methods and apparatuses described herein may further include a network equipment (NE) for wireless communication, which includes: at least one memory; and at least one processor coupled with the at least one memory and configured to cause the NE to: determine one indicated DL TCI state for DL transmissions and multiple indicated UL TCI states for UL receptions in an activated BWP of a serving cell; receive a DL RS being transmitted in response to a beam failure; and in response to receiving the DL RS, determine a spatial domain filter and power control parameters for a UL reception associated with at least one indicated UL TCI state of the multiple indicated UL TCI states before receiving the DL RS based on the at least one indicated UL TCI state and the reported DL RS.

In some implementations of the methods and apparatuses described herein, determining the spatial domain filter and power control parameters for the UL reception associated with the at least one indicated UL TCI state includes: determining the spatial domain filter for the UL reception associated with the at least one indicated UL TCI state to be that associated with the reported DL RS; determining pathloss RS of the power control parameters for the UL reception associated with the at least one indicated UL TCI state to be that associated with the reported DL RS; and determining other power control parameters of the power control parameters to be default ones.

In some implementations of the methods and apparatuses described herein, determining the spatial domain filter and power control parameters for the UL reception associated with the at least one indicated UL TCI state includes: determining the spatial domain filter and the power control parameters for the UL reception associated with the at least one indicated UL TCI state to be same as those of the at least one indicated UL TCI state.

In some implementations of the methods and apparatuses described herein, determining the spatial domain filter and power control parameters for the UL reception associated with the at least one indicated UL TCI state includes: determining the spatial domain filter for the UL reception associated with the at least one indicated UL TCI state to be same as that of the at least one indicated UL TCI state; determining pathloss RS of the power control parameters for the UL reception associated with the at least one indicated UL TCI state to be that associated with the reported DL RS; and determining other power control parameters of the power control parameters for the UL reception associated with the at least one indicated UL TCI state to be same as those of the at least one indicated UL TCI state.

In some implementations of the methods and apparatuses described herein, determining the spatial domain filter and power control parameters for the UL reception associated with the at least one indicated UL TCI state includes: determining the spatial domain filter for the UL reception associated with the at least one indicated UL TCI state to be same as that of the at least one indicated UL TCI state; determining pathloss RS of the power control parameters for the UL reception associated with the at least one indicated UL TCI state to be that associated with the reported DL RS; and determining other power control parameters of the power control parameters to be default ones.

Some implementations of the methods and apparatuses described herein may further include a method performed by a UE, which includes: determining one indicated DL TCI state for DL receptions and multiple indicated UL TCI states for UL transmissions in an activated BWP of a serving cell; reporting a DL RS in response to a beam failure; and in response to reporting the DL RS, determining a spatial domain filter and power control parameters for a UL transmission associated with at least one indicated UL TCI state of the multiple indicated UL TCI states before the beam failure based on the at least one indicated UL TCI state and the reported DL RS.

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

Figure 3 illustrates an example of a processor in accordance with aspects of the present disclosure.

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

Figure 5 illustrates a flowchart of method performed by a UE in accordance with aspects of the present disclosure.

Figure 6 illustrates a flowchart of method performed by a NE in accordance with aspects of the present disclosure.

DETAILED DESCRIPTION

As a research topic for 3^rd generation partnership project (3GPP) release (R) 19, enhancements for asymmetric DL single TRP (sTRP or S-TRP) and UL multiple (mTRP or M-TRP) (referred to as DL sTRP/UL mTRP or the like) deployment scenarios will be specified for heterogeneous network to improve UL throughput. Regarding an asymmetric DL sTRP/UL mTRP deployment scenario, it means all DL channels or signals will be transmitted from only one TRP, while UL channels or signals will be received with multiple, e.g., two TRPs in accordance with RRC configurations or downlink control information (DCI) indication etc. Accordingly, there are various technical problems to be solved to enhance asymmetric DL sTRP/UL mTRP deployment scenarios, for example, issues on how to perform uplink transmissions after beam failure recovery (BFR) or beam failure recovery request (BFRQ) in asymmetric DL sTRP/UL mTRP deployment scenarios. Regarding a "beam, " it can be represented by or associated with spatial relation information, TCI state, or RS etc.

At least in view of the aforementioned issues, aspects of the present disclosure provide a technical solution of supporting uplink transmissions, e.g., a method and apparatus of supporting uplink transmissions, e.g., after BFR in asymmetric DL sTRP/UL mTRP deployment scenarios or other similar asymmetric TRP deployment scenarios.

For example, in accordance with aspects of the present disclosure, in asymmetric DL sTRP/UL mTRP deployment scenarios or the like, UE will determine one indicated DL TCI state for DL receptions and multiple indicated UL TCI states for UL transmissions in an activated BWP of a serving cell. Regarding an indicated TCI state, it is a TCI state indicated to be applicable from a time instance in the activated BWP of a serving cell, which may also be referred to as an applicable TCI state. Each indicated TCI state is associated with a beam and each UL indicated TCI state is also associated with power control information etc. For example, each indicated UL TCI state will be associated with a spatial domain filter and a set of power control parameters for UL transmissions.

In response to a beam failure, e.g., a beam failure associated the DL indicated TCI state, UE will report a DL RS (e.g., with the BFR) if it is found, which indicates a beam selected by the UE (hereinafter, new beam) whose quality is not less than a configured threshold for replacing the failed beam. Regarding a beam failure, it means the radio link quality of all failure detection resources in the set of failure detection resources is lower than a corresponding threshold.

Even if the beam failure is only detected in the downlink channel, it may affect the UL transmissions in in asymmetric DL sTRP/UL mTRP deployment scenarios or the like. Thus, how to perform UL transmissions after BFRQ in UE side, especially how to set the beam (e.g., the spatial domain filter) and power control parameters should be solved. In accordance with aspects of the present disclosure, in response to the BFR or reporting the DL RS, for a UL transmission to be performed which is associated with at least one indicated UL TCI state of the multiple indicated UL TCI states before the beam failure, UE will determine a beam e.g., a spatial domain filter and power control parameters the UL transmission based on the at least one indicated UL TCI state and the reported DL RS.

For example, in some implementations of the present disclosure, UE may determine the spatial domain filter for the UL transmission associated with the at least one indicated UL TCI state before the beam failure to be that associated with the reported DL RS, determine pathloss RS of the power control parameters for the UL transmission associated with the at least one indicated UL TCI state before the beam failure to be that associated with the reported DL RS, and determine other power control parameters of the power control parameters to be default ones.

In some other implementations of the present disclosure, UE may determine the spatial domain filter and the power control parameters for the UL transmission associated with the at least one indicated UL TCI state before the beam failure to be the same as those of the at least one indicated UL TCI state.

In some yet other implementations of the present disclosure, UE may determine the spatial domain filter for the UL transmission associated with the at least one indicated UL TCI state before the beam failure to be the same as that of the at least one indicated UL TCI state, determine pathloss RS of the power control parameters for the UL transmission associated with the at least one indicated UL TCI state before the beam failure to be that associated with the reported DL RS, and determine other power control parameters of the power control parameters for the UL transmission associated with the at least one indicated UL TCI state before the beam failure to be the same as those of the at least one indicated UL TCI state.

In some yet other implementations of the present disclosure, UE may determine the spatial domain filter for the UL transmission associated with the at least one indicated UL TCI state before the beam failure to be the same as that of the at least one indicated UL TCI state, determine pathloss RS of the power control parameters for the UL transmission associated with the at least one indicated UL TCI state before the beam failure to be that associated with the reported DL RS, and determine other power control parameters of the power control parameters to be default ones.

Aspects of the present disclosure are described in the context of a wireless communication 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 TRPs. A TRP may be referred to as other terminologies, e.g., a panel, or represented by a CORESETPoolIndex value or a TCI state index etc.

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 accordance with aspects of the present disclosure, in some asymmetric DL sTRP/UL mTRP deployment scenarios or the like (scenarios 1) , there is one TRP that can perform both DL transmissions and UL receptions (hereinafter, DL/UL TRP) and one or more TRPs that can only perform UL reception (hereafter, UL only TRP) . That is, the multiple UL TRPs include one DL/UL TRP and one or more UL only TRPs in scenarios 1. In some other asymmetric DL sTRP/UL mTRP deployment scenarios or the like (scenarios 2) , there is one TRP that can only perform DL transmissions (hereinafter, DL only TRP) and multiple, e.g., two TRPs that can only perform UL receptions. That is, the multiple UL TRPs all are UL only TRPs in scenarios 2. Herein, a DL TRP or a DL/UL TRP is also be referred to as a macro TRP (or a macro gNB or the like) , which will perform DL transmissions and may also receive UL transmissions; while a UL only TRP is also referred to as a micro TRP (or a micro node or the like) , which will only receive UL transmissions.

If a UL transmission is transmitted towards a micro TRP, a source RS of the transmitting (TX) beam of the UL transmission should correspond to the micro TRP. However, in accordance with legacy 3GPP release (s) , e.g., R17 and R18, only DL RS can be configured as a source RS for a joint or DL TCI state, while either DL RS (e.g., channel state information (CSI) RS) or UL RS (e.g., sounding resource signal (SRS) ) can be configured as a source RS for a UL TCI state. Since no DL RS is transmitted from a micro TRP, only SRS can be the source RS of the TX beam of the UL transmission in asymmetric DL sTRP/UL mTRP deployment scenarios or the like in FR2.

In accordance with aspects of the present disclosure, a separate TCI state mode will be configured for asymmetric DL sTRP/UL mTRP deployment in high frequency band (or high carrier frequency spectrum) , e.g., FR2 where SRS will be used as source RSs for UL TCI states. A separate TCI state mode in a BWP of a serving cell means both of UL-TCIState (or the like) and DLorJointTCIState (or the like) are configured in the BWP of the serving cell. Therefore, there is one DL indicated TCI state and two or more UL indicated TCI states in asymmetric DL sTRP/UL mTRP deployment in high frequency band. Besides, pathloss RS, which is also a DL RS, is configured for each TCI state for each UL channel or UL signal.

Considering that BFRQ is only applied in high frequency band where the transmissions and receptions in UE side is not omnidirectional, it needs to determine both of beam (or spatial filter information) , e.g., spatial domain filter and power control parameters (or, a power control parameter set) for UL transmissions after BFRQ.

In accordance with legacy 3GPP specification (s) , beam (s) for UL transmissions after BFRQ will always be reset as the new beam, which is a SS/PBCH block (SSB) or CSI-RS transmitted from the DL TRP. However, in asymmetric DL sTRP/UL mTRP deployment scenarios, the beam towards a UL only TRP or micro TRP is not corresponding to the beam transmitted from the macro TRP. Although a scheme identical or similar to the legacy scheme can be applied, it cannot take advantage of asymmetric DL sTRP/UL mTRP deployments in some cases.

For example, in asymmetric TRP deployment scenarios, the macro TRP and micro TRPs differ in power rating. UE may receive DL transmissions from the macro TRP, but perform UL transmissions to either the macro TRP or micro TRP (s) which is non-co-located with the macro TRP in order to maximize UL throughputs. To further reduce energy consumption, in some cases, the micro TRP (s) may, for instance, reduce or even turn off DL transmissions. To support this deployment scenario, enhancements at least on UL power control (PC) are needed. For example, when pathloss RS is transmitted from the macro TRP and the UE performs UL transmissions to the micro TRPs, the pathloss measured from the pathloss RS from the macro TRP is not accurate. Therefore, it is necessary to configure the UE with pathloss offsets to facilitate accurate calculation of the pathloss associated with the micro TRPs. For another example, an additional SRS closed-loop PC adjustment state for DL CSI acquisition to the macro TRP (or for DL transmissions in the network side) , which is separate from that for the SRS to the micro nodes (or for UL mTRP receptions in the network side) may be introduced. It needs to support two or more closed-loop PC adjustment states for SRSs, which are all separate from PUSCHs.

Thus, to maximize UL throughputs and further reduce energy consumption in asymmetric DL sTRP/UL mTRP deployment scenarios, aspects of the present disclosure provide several novel schemes for UL transmissions after BFR. For example, whether the beam (s) of a UL transmission after BFR will be reset as the new beam after BFR will consider whether the UL transmission is transmitted to the macro TRP or micro TRP. Regarding which scheme, e.g., a legacy one or a novel one to determine the beam (s) and power control parameters for UL transmissions after BFR will be predefined or based on a high layer signaling, e.g., a RRC signaling.

Details of aspects of the present disclosure are illustrated in the following in view of exemplary implementations of the present disclosure respectively in scenarios 1 and scenarios 2. Although the exemplary implementations of the present disclosure are mainly illustrated in the perspective view of UE side, persons skilled in the art should well understand how the technical solutions will be performed in the network side based on the consistency between the network side and UE side, and thus will not repeat for simplification.

Scenarios 1

In scenarios 1, one of multiple, e.g., two indicated UL beams corresponds to a macro TRP where DL transmissions are performed and the other indicated UL beam (s) corresponds to a micro TRP. In some implementations of the present disclosure, the indicated UL beam corresponding to the macro TRP is the first indicated UL beam of the multiple indicated UL beams, which can be guaranteed by gNB implementation or the like.

In accordance with aspects of the present disclosure, after BFRQ, for a UL transmission, whose previous beam before beam failure or BFRQ is the indicated UL beam corresponding to a macro TRP, e.g., the first indicated UL beam, the beam of the UL transmission will be reset as the new beam (or reported beam) , which is associated with the reported DL RS. The pathloss RS of the power control parameters for the UL transmission will be updated (or determined or the like) to be that associated with the new beam, while other power control parameters of the power control parameter set, e.g., P0, alpha, closed loop index and pathloss offset (if any) etc. will be updated to be default ones, e.g., the default P0, alpha and closed loop index etc. For a PUSCH, the default ones (P0, alpha and closed loop index) are provided by p0AlphaSetforPUSCH associated with the smallest value of ul-powercontrolId for the serving cell. For a PUCCH, the default ones (P0 and closed loop index) are provided by p0AlphaSetforPUCCH associated with the smallest value of ul- powercontrolId for the serving cell. For a SRS, the default ones (P0, alpha and closed loop index) are provided by p0AlphaSetforSRS associated with the smallest value of ul-powercontrolId for the serving cell.

For example, there are two or more UL indicated TCI states (associated with two or more beams before beam failure) , wherein the first UL indicated TCI state is corresponding to the macro TRP. In response to reporting a DL RS (associated with a new beam) due to beam failure, for a UL transmission after BFR which is associated with the first indicated UL TCI state before the beam failure, UE will determine the spatial domain filter for the UL transmission to be that associated with the reported DL RS, determine pathloss RS of the power control parameters for the UL transmission to be that associated with the reported DL RS, and determine other power control parameters of the power control parameters to be default ones.

Accordingly, the corresponding part in TS38.213 will be updated in an exemplary manner as follows.

"If a UE is provided dl-OrJoint-TCIStateList and TCI-UL-State indicating a DL TCI state and two UL TCI states for the PCell or the PSCell and the UE provides BFR MAC CE in Msg3 or MsgA of contention based random access procedure, after 28 symbols from the last symbol of the PDCCH reception that determines the completion of the contention based random access procedure as described in [11, TS 38.321] , the UE

- if SSB-MTC-AdditionalPCI is not provided, monitors PDCCH in all CORESETs, and receives PDSCH and aperiodic CSI-RS resource in a CSI-RS resource set with same indicated TCI state as for the PDCCH and PDSCH using the same antenna port quasi co-location parameters as the ones associated with the corresponding index q_new, if any

- transmits PUSCH, PUCCH and SRS that uses a spatial domain filter with the first indicated UL TCI state, using a same spatial domain filter as for the last PRACH transmission using the following parameters for determination of a corresponding power as described in clauses 7.1.1, 7.2.1, and 7.3.1

- the RS index q_d=q_new for obtaining the downlink pathloss estimate

- the values of P_{O_UE_PUSCH, b, f, c} (j) , α_b, f, c (j) , and the PUSCH power control adjustment state l provided by p0AlphaSetforPUSCH associated with the smallest value of ul-powercontrolId for the PCell or the PSCell

- the value of P_{O_PUCCH, b, f, c} (q_u) and the PUCCH power control adjustment state l provided by p0AlphaSetforPUCCH associated with the smallest value of ul-powercontrolId for the PCell or the PSCell

- the values of P_{O_SRS, b, f, c} (q_s) , α_{SRS, b, f, c} (q_s) , and the SRS power control adjustment state l provided by p0AlphaSetforSRS associated with the smallest value of ul-powercontrolId for the PCell or the PSCell

If a UE is provided dl-OrJoint-TCIStateList and TCI-UL-State indicating a DL TCI state and two UL TCI states, after 28 symbols from a last symbol of a PDCCH reception with a DCI format scheduling a PUSCH transmission with a same HARQ process number as for the transmission of the first PUSCH and having a toggled NDI field value, the UE

- monitors PDCCH in all CORESETs, and receives PDSCH and aperiodic CSI-RS resource in a CSI-RS resource set using the same antenna port quasi co-location parameters as the ones associated with the corresponding index q_new, if any

- transmits PUSCH, PUCCH and SRS that uses a spatial domain filter with the first indicated UL TCI state, using a same spatial domain filter as the one corresponding to q_new, if any, and using the following parameters for determination of a corresponding power as described in clauses 7.1.1, 7.2.1, and 7.3.1

- the RS index q_d=q_new for obtaining the downlink pathloss estimate

- the values of P_{O_UE_PUSCH, b, f, c} (j) , α_b, f, c (j) , and the PUSCH power control adjustment state l provided by p0AlphaSetforPUSCH associated with the smallest value of ul-powercontrolId for the corresponding SCell

- the value of P_{O_PUCCH, b, f, c} (q_u) and the PUCCH power control adjustment state l provided by p0AlphaSetforPUCCH associated with the smallest value of ul-powercontrolId for the corresponding SCell

- the values of P_{O_SRS, b, f, c} (q_s) , α_{SRS, b, f, c} (q_s) , and the SRS power control adjustment state l provided by p0AlphaSetforSRS associated with the smallest value of ul-powercontrolId for the corresponding SCell. "

Regarding a UL transmission whose previous beam before beam failure or BFRQ is corresponding to a micro TRP, e.g., the second indicated UL beam, the beam of the UL transmission may be reset as the new beam as legacy or not, which may be predefined or indicated by a high layer signaling. For example, whether the beam of the UL transmission will be reset as the new beam as legacy or not may be enabled by a RRC parameter. For example, if it is not enabled by the RRC parameter, the legacy scheme will be used, which means the beam of the UL transmission after BFRQ will be always reset as the new beam, the pathloss RS will be updated as the new beam, and other power control parameters will be set as default power control parameters. If it is enabled by the RRC parameter, then a novel scheme will be applied for the UL transmission after BFRQ whose previous beam before BFRQ is corresponding to a micro TRP, e.g., the second indicated UL beam to determine the beam and power control parameters. In some other implementations, the RRC parameter being enabled may indicate a legacy scheme will be applied, while the RRC parameter being not enabled may indicate a novel scheme will be applied. In the case that there are multiple beams corresponding to micro TRPs, the RRC parameter can be configured based on each beam corresponding to a micro TRP or based on all the beams corresponding to micro TRPs.

In some implementations of the present disclosure (scheme 1) , the beam of a UL transmission after BFRQ, whose previous beam before beam failure or BFRQ is corresponding to a micro TRP, e.g., the second indicated UL beam, will not be reset as the new beam, which means the beam of the UL transmission will not change after BFRQ. The power control parameters for the UL transmission whose previous beam is corresponding to a micro TRP will not change either after BFRQ.

For example, there are two or more UL indicated TCI states (associated with two or more beams before beam failure) , wherein only the first UL indicated TCI state is corresponding to the macro TRP. In response to reporting a DL RS (associated with a new beam) due to beam failure, for a UL transmission after BFR which is associated with the second indicated UL TCI state before the beam failure, UE will determine the spatial domain filter and the power control parameters for the UL transmission to be the same as those of the second indicated UL TCI state.

Accordingly, the corresponding part for the second indicated UL TCI state in scenarios 1 in TS38.213 in accordance with scheme 1 will be updated in an exemplary manner as follows.

- transmits PUSCH, PUCCH and SRS that uses a spatial domain filter with the second indicated UL TCI state, using a same spatial domain filter with the second indicated UL TCI state using the following parameters for determination of a corresponding power as described in clauses 7.1.1, 7.2.1, and 7.3.1

- the RS index associated with the second indicated UL TCI state for obtaining the downlink pathloss estimate

- the values of P_{O_UE_PUSCH, b, f, c} (j) , α_b, f, c (j) , and the PUSCH power control adjustment state l provided by p0AlphaSetforPUSCH associated with the second indicated UL TCI state

- the value of P_{O_PUCCH, b, f, c} (q_u) and the PUCCH power control adjustment state l provided by p0AlphaSetforPUCCH associated with the second indicated UL TCI state

- the values of P_{O_SRS, b, f, c} (q_s) , α_{SRS, b, f, c} (q_s) , and the SRS power control adjustment state l provided by p0AlphaSetforSRS associated with the second indicated UL TCI state

- transmits PUSCH, PUCCH and SRS that uses a spatial domain filter with the second indicated UL TCI state, using a same spatial domain filter with the second indicated UL TCI state, and using the following parameters for determination of a corresponding power as described in clauses 7.1.1, 7.2.1, and 7.3.1

- the values of P_{O_SRS, b, f, c} (q_s) , α_{SRS, b, f, c} (q_s) , and the SRS power control adjustment state l provided by p0AlphaSetforSRS associated with the second indicated UL TCI state. "

In some other implementations of the present disclosure (scheme 2) , the beam of a UL transmission, whose previous beam before beam failure or BFRQ is corresponding to a micro TRP, e.g., the second indicated UL beam, will not change after BFRQ. The pathloss RS of the UL transmission will be reset according to the new beam after BFRQ, while other power control parameters (e.g., P0, alpha and closed loop index etc. ) will not change either after BFRQ.

For example, there are two or more UL indicated TCI states (associated with two or more beams before beam failure) , wherein only the first UL indicated TCI state is corresponding to the macro TRP. In response to reporting a DL RS (associated with a new beam) due to beam failure, for a UL transmission after BFR which is associated with the second indicated UL TCI state before the beam failure, UE will determine the spatial domain filter for the UL transmission to be same as that associated with the second indicated UL TCI state, determine the pathloss RS of the power control parameters for the UL transmission to be that associated with the reported DL RS, and determine other power control parameters for the UL transmission to be the same as those of the second indicated UL TCI state.

Accordingly, the corresponding part for the second indicated UL TCI state in scenarios 1 in TS38.213 will be updated in accordance with scheme 2 in an exemplary manner as follows.

- the RS index q_d=q_new for obtaining the downlink pathloss estimate

- the RS index q_d=q_new if any for obtaining the downlink pathloss estimate

In some implementations of the present disclosure (scheme 3) , the beam of a UL transmission after BFRQ, whose previous beam before beam failure or BFRQ is corresponding to a micro TRP, e.g., the second indicated UL beam, will not change after BFRQ. The pathloss RS of the UL transmission is reset as the new beam after BFRQ and the other power control parameters (e.g., P0, alpha and closed loop index etc. ) are reset as default after BFRQ.

For example, there are two or more UL indicated TCI states (associated with two or more beams before beam failure) , wherein only the first UL indicated TCI state is corresponding to the macro TRP. In response to reporting a DL RS (associated with a new beam) due to beam failure, for a UL transmission after BFR which is associated with the second indicated UL TCI state before the beam failure, UE will determine the spatial domain filter for the UL transmission to be the same as that of the second indicated UL TCI state. UE will determine pathloss RS of the power control parameters for the UL transmission to be that associated with the reported DL RS, and determine other power control parameters of the power control parameters to be default ones.

Accordingly, the corresponding part for the second indicated UL TCI state in scenarios 1 in TS38.213 will be updated in accordance with scheme 3 in an exemplary manner as follows.

- the RS index q_d=q_new for obtaining the downlink pathloss estimate

- the RS index q_d=q_new if any, for obtaining the downlink pathloss estimate

Scenarios 2

In scenarios 2, all the multiple, e.g., two indicated UL beams correspond to micro TRPs. Similar to the indicated UL beam (s) corresponding to micro TRP (s) in scenarios 1, whether the beam (s) of the UL transmission will be reset as the new beam as legacy or not may be predefined or based on a RRC parameter. The RRC parameter can be enabled or not per indicated UL beam or all the indicated UL beams. For example, if it is enabled per indicated UL beam, then a novel scheme will be enabled for each UL indicated beam, e.g., the first UL indicated beam, or the second indicated UL beam, or both in the case of two indicated UL beams. If it is enabled for all indicated UL beams, then a novel scheme will be enabled for all the multiple, e.g., two indicated UL beams. In the case that the RRC parameter is not enabled, a legacy scheme will be applied. The novel scheme may be one of the three schemes illustrated in scenarios 1, and will not repeat.

The UL transmission may be associated with one or more indicated beams. In the case that a UL transmission after BFRQ, is associated with more than one UL indicated beam, e.g., two UL indicated beams, more than one beam and associated power control parameters will be determined for the UL transmission based on the new beam and the corresponding previous more than beam. For example, for a UL transmission after BFRQ, which is associated with the first indicated UL beam and the second indicated UL beam before BFRQ, UE will determine a first spatial domain filter and a first power control parameters based on the new beam and the first indicated UL beam and determine a second spatial domain filter and a second power control parameters based on the new beam and the second indicated UL beam. That is also applicable in scenarios 1 in the case that there is more than one UL indicated beam corresponding to micro TRPs.

Accordingly, the corresponding part for an indicated UL TCI state in scenarios 2 in TS38.213 will be updated in accordance with scheme 1 in an exemplary manner as follows.

- transmits PUSCH, PUCCH and SRS that uses a spatial domain filter with any one of the two indicated UL TCI states, using a same spatial domain filter with the indicated UL TCI state (s) before BFRQ, and using the same parameters associated with the indicated UL TCI state (s) before BFRQ for determination of a corresponding power as described in clauses 7.1.1, 7.2.1, and 7.3.1

- transmits PUSCH, PUCCH and SRS that uses a spatial domain filter with any of the two indicated UL TCI state, using a same spatial domain filter with the indicated UL TCI state (s) before BFRQ, and using the using the same parameters associated with the indicated UL TCI state (s) before BFRQ for determination of a corresponding power as described in clauses 7.1.1, 7.2.1, and 7.3.1. "

The corresponding part for an indicated UL TCI state in scenarios 2 in TS38.213 will be updated in accordance with scheme 2 in an exemplary manner as follows.

- transmits PUSCH, PUCCH and SRS that uses a spatial domain filter with any of the two indicated UL TCI states, using a same spatial domain filter with the indicated UL TCI state (s) before BFRQ, and using the following parameters for determination of a corresponding power as described in clauses 7.1.1, 7.2.1, and 7.3.1

- the RS index q_d=q_new for obtaining the downlink pathloss estimate

- the values of P_{O_UE_PUSCH, b, f, c} (j) , α_b, f, c (j) , and the PUSCH power control adjustment state l provided by p0AlphaSetforPUSCH associated with the indicated UL TCI state (s) before BFRQ

- the value of P_{O_PUCCH, b, f, c} (q_u) and the PUCCH power control adjustment state l provided by p0AlphaSetforPUCCH associated with the indicated UL TCI state (s) before BFRQ

- the values of P_{O_SRS, b, f, c} (q_s) , α_{SRS, b, f, c} (q_s) , and the SRS power control adjustment state l provided by p0AlphaSetforSRS associated with the indicated UL TCI state before BFRQ

- the RS index q_d=q_new if any for obtaining the downlink pathloss estimate

- the values of P_{O_SRS, b, f, c} (q_s) , α_{SRS, b, f, c} (q_s) , and the SRS power control adjustment state l provided by p0AlphaSetforSRS associated with the indicated UL TCI state before BFRQ. "

The corresponding part for an indicated UL TCI state in scenarios 2 in TS38.213 will be updated in accordance with scheme 3 in an exemplary manner as follows.

- transmits PUSCH, PUCCH and SRS that uses a spatial domain filter with any of the two indicated UL TCI states, using a same spatial domain filter with the indicated UL TCI state (s) before BFRQ using the following parameters for determination of a corresponding power as described in clauses 7.1.1, 7.2.1, and 7.3.1

- the RS index q_d=q_new for obtaining the downlink pathloss estimate

- the RS index q_d=q_new if any, for obtaining the downlink pathloss estimate

Figure 2 illustrates an example of a UE 200 in accordance with aspects of the present disclosure. The UE 200 may include a processor 202, a memory 204, a controller 206, and a transceiver 208. The processor 202, the memory 204, the controller 206, or the transceiver 208, 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 202, the memory 204, the controller 206, or the transceiver 208, 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 202 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 202 may be configured to operate the memory 204. In some other implementations, the memory 204 may be integrated into the processor 202. The processor 202 may be configured to execute computer-readable instructions stored in the memory 204 to cause the UE 200 to perform various functions of the present disclosure.

The memory 204 may include volatile or non-volatile memory. The memory 204 may store computer-readable, computer-executable code including instructions when executed by the processor 202 cause the UE 200 to perform various functions described herein. The code may be stored in a non-transitory computer-readable medium such the memory 204 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 202 and the memory 204 coupled with the processor 202 may be configured to cause the UE 200 to perform one or more of the functions described herein (e.g., executing, by the processor 202, instructions stored in the memory 204) . For example, the processor 202 may support wireless communication at the UE 200 in accordance with examples as disclosed herein. The UE 200 may be configured to support a means for determining one indicated DL TCI state for DL receptions and multiple indicated UL TCI states for UL transmissions in an activated BWP of a serving cell; a means for reporting a DL RS in response to a beam failure; and a means for in response to reporting the DL RS, determining a spatial domain filter and power control parameters for a UL transmission associated with at least one indicated UL TCI state of the multiple indicated UL TCI states before the beam failure based on the at least one indicated UL TCI state and the reported DL RS.

The controller 206 may manage input and output signals for the UE 200. The controller 206 may also manage peripherals not integrated into the UE 200. In some implementations, the controller 206 may utilize an operating system such as or other operating systems. In some implementations, the controller 206 may be implemented as part of the processor 202.

In some implementations, the UE 200 may include at least one transceiver 208. In some other implementations, the UE 200 may have more than one transceiver 208. The transceiver 208 may represent a wireless transceiver. The transceiver 208 may include one or more receiver chains 210, one or more transmitter chains 212, or a combination thereof.

A receiver chain 210 may be configured to receive signals (e.g., control information, data, packets) over a wireless medium. For example, the receiver chain 210 may include one or more antennas for receive the signal over the air or wireless medium. The receiver chain 210 may include at least one amplifier (e.g., a low-noise amplifier (LNA) ) configured to amplify the received signal. The receiver chain 210 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 210 may include at least one decoder for decoding the processing the demodulated signal to receive the transmitted data.

A transmitter chain 212 may be configured to generate and transmit signals (e.g., control information, data, packets) . The transmitter chain 212 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 212 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 212 may also include one or more antennas for transmitting the amplified signal into the air or wireless medium.

Figure 3 illustrates an example of a processor 300 in accordance with aspects of the present disclosure. The processor 300 may be an example of a processor configured to perform various operations in accordance with examples as described herein. The processor 300 may include a controller 302 configured to perform various operations in accordance with examples as described herein. The processor 300 may optionally include at least one memory 304, which may be, for example, an L1/L2/L3 cache. Additionally, or alternatively, the processor 300 may optionally include one or more arithmetic-logic units (ALUs) 306. 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 300 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 300) 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 302 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 300 to cause the processor 300 to support various operations in accordance with examples as described herein. For example, the controller 302 may operate as a control unit of the processor 300, generating control signals that manage the operation of various components of the processor 300. These control signals include enabling or disabling functional units, selecting data paths, initiating memory access, and coordinating timing of operations.

The controller 302 may be configured to fetch (e.g., obtain, retrieve, receive) instructions from the memory 304 and determine subsequent instruction (s) to be executed to cause the processor 300 to support various operations in accordance with examples as described herein. The controller 302 may be configured to track memory address of instructions associated with the memory 304. The controller 302 may be configured to decode instructions to determine the operation to be performed and the operands involved. For example, the controller 302 may be configured to interpret the instruction and determine control signals to be output to other components of the processor 300 to cause the processor 300 to support various operations in accordance with examples as described herein. Additionally, or alternatively, the controller 302 may be configured to manage flow of data within the processor 300. The controller 302 may be configured to control transfer of data between registers, arithmetic logic units (ALUs) , and other functional units of the processor 300.

The memory 304 may include one or more caches (e.g., memory local to or included in the processor 300 or other memory, such RAM, ROM, DRAM, SDRAM, SRAM, MRAM, flash memory, etc. In some implementations, the memory 304 may reside within or on a processor chipset (e.g., local to the processor 300) . In some other implementations, the memory 304 may reside external to the processor chipset (e.g., remote to the processor 300) .

The memory 304 may store computer-readable, computer-executable code including instructions that, when executed by the processor 300, cause the processor 300 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 302 and/or the processor 300 may be configured to execute computer-readable instructions stored in the memory 304 to cause the processor 300 to perform various functions. For example, the processor 300 and/or the controller 302 may be coupled with or to the memory 304, the processor 300, the controller 302, and the memory 304 may be configured to perform various functions described herein. In some examples, the processor 300 may include multiple processors and the memory 304 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 306 may be configured to support various operations in accordance with examples as described herein. In some implementations, the one or more ALUs 306 may reside within or on a processor chipset (e.g., the processor 300) . In some other implementations, the one or more ALUs 306 may reside external to the processor chipset (e.g., the processor 300) . One or more ALUs 306 may perform one or more computations such as addition, subtraction, multiplication, and division on data. For example, one or more ALUs 306 may receive input operands and an operation code, which determines an operation to be executed. One or more ALUs 306 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 306 may support logical operations such as AND, OR, exclusive-OR (XOR) , not-OR (NOR) , and not-AND (NAND) , enabling the one or more ALUs 306 to handle conditional operations, comparisons, and bitwise operations.

The processor 300 may support wireless communication in accordance with examples as disclosed herein. The processor 300 may be configured to or operable to support a means for determining one indicated DL TCI state for DL receptions and multiple indicated UL TCI states for UL transmissions in an activated BWP of a serving cell; a means for reporting a DL RS in response to a beam failure; and a means for in response to reporting the DL RS, determining a spatial domain filter and power control parameters for a UL transmission associated with at least one indicated UL TCI state of the multiple indicated UL TCI states before the beam failure based on the at least one indicated UL TCI state and the reported DL RS.

Figure 4 illustrates an example of a NE 400 in accordance with aspects of the present disclosure. The NE 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 NE 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 NE 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 NE 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 NE 400 in accordance with examples as disclosed herein. The NE 400 may be configured to support a means for determining one indicated DL TCI state for DL transmissions and multiple indicated UL TCI states for UL receptions in an activated BWP of a serving cell; a means for receiving a DL RS being transmitted in response to a beam failure; and a means for in response to receiving the DL RS, determining a spatial domain filter and power control parameters for a UL reception associated with at least one indicated UL TCI state of the multiple indicated UL TCI states before receiving the DL RS based on the at least one indicated UL TCI state and the received DL RS.

The controller 406 may manage input and output signals for the NE 400. The controller 406 may also manage peripherals not integrated into the NE 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 NE 400 may include at least one transceiver 408. In some other implementations, the NE 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 a flowchart of a method 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 501, the method may include determining one indicated DL TCI state for DL receptions and multiple indicated UL TCI states for UL transmissions in an activated BWP of a serving cell. The operations of 501 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 501 may be performed by a UE as described with reference to Figure 2.

At 503, the method may include reporting a DL RS in response to a beam failure. The operations of 503 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 503 may be performed by a UE as described with reference to Figure 2.

At 505, the method may include in response to reporting the DL RS, determining a spatial domain filter and power control parameters for a UL transmission associated with at least one indicated UL TCI state of the multiple indicated UL TCI states before the beam failure based on the at least one indicated UL TCI state and the reported DL RS. The operations of 505 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 505 may be performed by a UE as described with reference to Figure 2.

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 6 illustrates a flowchart of a method 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 601, the method may include determine one indicated DL TCI state for DL transmissions and multiple indicated UL TCI states for UL receptions in an activated BWP of a serving cell. The operations of 601 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 601 may be performed by a NE as described with reference to Figure 4.

At 603, the method may include receiving a DL RS being transmitted in response to a beam failure. The operations of 603 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 603 may be performed by a NE as described with reference to Figure 4.

At 605, the method may include in response to receiving the DL RS, determining a spatial domain filter and power control parameters for a UL reception associated with at least one indicated UL TCI state of the multiple indicated UL TCI states before receiving the DL RS based on the at least one indicated UL TCI state and the received DL RS. The operations of 605 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 605 may be performed by a NE as described with reference to Figure 4.

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:

determine one indicated downlink (DL) transmission configuration indication (TCI) state for DL receptions and multiple indicated uplink (UL) TCI states for UL transmissions in an activated bandwidth part (BWP) of a serving cell;

report a DL reference signal (RS) in response to a beam failure; and

in response to reporting the DL RS, determine a spatial domain filter and power control parameters for a UL transmission associated with at least one indicated UL TCI state of the multiple indicated UL TCI states before the beam failure based on the at least one indicated UL TCI state and the reported DL RS.
The UE of claim 1, wherein, determining the spatial domain filter and power control parameters for the UL transmission associated with the at least one indicated UL TCI state before the beam failure comprises:

determining the spatial domain filter for the UL transmission associated with the at least one indicated UL TCI state before the beam failure to be that associated with the reported DL RS;

determining pathloss RS of the power control parameters for the UL transmission associated with the at least one indicated UL TCI state before the beam failure to be that associated with the reported DL RS; and

determining other power control parameters of the power control parameters to be default ones.
The UE of claim 2, wherein, the at least one indicated UL TCI state is a first indicated UL TCI state of the multiple indicated UL TCI states.
The UE of claim 1, wherein, determining the spatial domain filter and power control parameters for the UL transmission associated with the at least one indicated UL TCI state before the beam failure comprises:

determining the spatial domain filter and the power control parameters for the UL transmission associated with the at least one indicated UL TCI state before the beam failure to be same as those of the at least one indicated UL TCI state.
The UE of claim 1, wherein, determining the spatial domain filter and power control parameters for the UL transmission associated with the at least one indicated UL TCI state before the beam failure comprises:

determining the spatial domain filter for the UL transmission associated with the at least one indicated UL TCI state before the beam failure to be same as that of the at least one indicated UL TCI state;

determining pathloss RS of the power control parameters for the UL transmission associated with the at least one indicated UL TCI state before the beam failure to be that associated with the reported DL RS; and

determining other power control parameters of the power control parameters for the UL transmission associated with the at least one indicated UL TCI state before beam failure to be same as those of the at least one indicated UL TCI state.
The UE of claim 1, wherein, determining the spatial domain filter and power control parameters for the UL transmission associated with the at least one indicated UL TCI state before the beam failure comprises:

determining the spatial domain filter for the UL transmission associated with the at least one indicated UL TCI state before the beam failure to be same as that of the at least one indicated UL TCI state;

determining pathloss RS of the power control parameters for the UL transmission associated with the at least one indicated UL TCI state before the beam failure to be that associated with the reported DL RS; and

determining other power control parameters of the power control parameters to be default ones.
The UE of claim 2, 4, 5, or 6, wherein, the at least one indicated UL TCI state is a second indicated UL TCI state of the multiple indicated UL TCI states.
The UE of claim 2, 4, 5 or 6, wherein, an indicated UL TCI state of the at least one indicated UL TCI state is any one of the multiple indicated UL TCI states.
The UE of claim 2, 4, 5, or 6, wherein, the at least one processor is configured to cause the UE to determine the spatial domain filter and the power control parameters based on a radio resource control (RRC) signaling.
A processor for wireless communication, comprising:

at least one controller coupled with at least one memory and configured to cause the processor to:

determine one indicated downlink (DL) transmission configuration indication (TCI) state for DL receptions and multiple indicated uplink (UL) TCI states for UL transmissions in an activated bandwidth part (BWP) of a serving cell;

report a DL reference signal (RS) in response to a beam failure; and

in response to reporting the DL RS, determine a spatial domain filter and power control parameters for a UL transmission associated with at least one indicated UL TCI state of the multiple indicated UL TCI states before the beam failure based on the at least one indicated UL TCI state and the reported DL RS.
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:

determine one indicated downlink (DL) transmission configuration indication (TCI) state for DL transmissions and multiple indicated uplink (UL) TCI states for UL receptions in an activated bandwidth part (BWP) of a serving cell;

receive a DL reference signal (RS) being transmitted in response to a beam failure; and

in response to receiving the DL RS, determine a spatial domain filter and power control parameters for a UL reception associated with at least one indicated UL TCI state of the multiple indicated UL TCI states before receiving the DL RS based on the at least one indicated UL TCI state and the received DL RS.
The NE of claim 11, wherein, determining the spatial domain filter and power control parameters for the UL reception associated with the at least one indicated UL TCI state comprises:

determining the spatial domain filter for the UL reception associated with the at least one indicated UL TCI state to be that associated with the reported DL RS;

determining pathloss RS of the power control parameters for the UL reception associated with the at least one indicated UL TCI state to be that associated with the reported DL RS; and

determining other power control parameters of the power control parameters to be default ones.
The NE of claim 12, wherein, the at least one indicated UL TCI state is a first indicated UL TCI state of the multiple indicated UL TCI states.
The NE of claim 11, wherein, determining the spatial domain filter and power control parameters for the UL reception associated with the at least one indicated UL TCI state comprises:

determining the spatial domain filter and the power control parameters for the UL reception associated with the at least one indicated UL TCI state to be same as those of the at least one indicated UL TCI state.
The NE of claim 11, wherein, determining the spatial domain filter and power control parameters for the UL reception associated with the at least one indicated UL TCI state comprises:

determining the spatial domain filter for the UL reception associated with the at least one indicated UL TCI state to be same as that of the at least one indicated UL TCI state;

determining pathloss RS of the power control parameters for the UL reception associated with the at least one indicated UL TCI state to be that associated with the reported DL RS; and

determining other power control parameters of the power control parameters for the UL reception associated with the at least one indicated UL TCI state to be same as those of the at least one indicated UL TCI state.
The NE of claim 11, wherein, determining the spatial domain filter and power control parameters for the UL reception associated with the at least one indicated UL TCI state comprises:

determining the spatial domain filter for the UL reception associated with the at least one indicated UL TCI state to be same as that of the at least one indicated UL TCI state;

determining pathloss RS of the power control parameters for the UL reception associated with the at least one indicated UL TCI state to be that associated with the reported DL RS; and

determining other power control parameters of the power control parameters to be default ones.
The NE of claim 12, 14, 15, or 16, wherein, the at least one indicated UL TCI state is a second indicated UL TCI state of the multiple indicated UL TCI states.
The NE of claim 14, 15 or 16, wherein, an indicated UL TCI state of the at least one indicated UL TCI state is any one of the multiple indicated UL TCI states.
The NE of claim 12, 14, 15, or 16, wherein, the at least one processor is configured to cause the UE to determine the spatial domain filter and the power control parameters based on a radio resource control (RRC) signaling.
A method performed by a user equipment (UE) , comprising:

determining one indicated downlink (DL) transmission configuration indication (TCI) state for DL receptions and multiple indicated uplink (UL) TCI states for UL transmissions in an activated bandwidth part (BWP) of a serving cell;

reporting a DL reference signal (RS) in response to a beam failure; and

in response to reporting the DL RS, determining a spatial domain filter and power control parameters for a UL transmission associated with at least one indicated UL TCI state of the multiple indicated UL TCI states before the beam failure based on the at least one indicated UL TCI state and the reported DL RS.