Unified transmission configuration indicator based low-layer triggered mobility and multi-transmission and reception point power control
By enabling user equipment to interpret and apply unified TCI states for managing beam settings, monitoring occasions, and power control in wireless communication systems, the challenges of LTM and mTRP operations are addressed, resulting in improved communication efficiency and performance.
Patent Information
- Application Number
- PCT/CN2023/133560
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2023-11-23
- Publication Date
- 2025-05-30
AI Technical Summary
Existing wireless communication systems face challenges in efficiently managing unified transmission configuration indicators (TCIs) for low-layer triggered mobility (LTM) and multi-transmission and reception point (mTRP) power control, particularly in coordinating beam settings, monitoring occasions, and timing advances across multiple network entities and TRPs.
The proposed solution involves a user equipment (UE) configured to receive and interpret unified TCI states, which indicate specific beams, monitoring occasions, and timing advances for communications with multiple network entities or TRPs. This allows the UE to adjust its transmission power and configure its communications accordingly based on explicit or implicit TCI state configurations.
This approach enhances the efficiency and effectiveness of LTM and mTRP operations by ensuring optimal beam alignment, power control, and mobility management across multiple network entities and TRPs, thereby improving overall wireless communication performance.
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Figure CN2023133560_30052025_PF_FP_ABST
Abstract
Description
UNIFIED TRANSMISSION CONFIGURATION INDICATOR BASED LOW-LAYER TRIGGERED MOBILITY AND MULTI-TRANSMISSION AND RECEPTION POINT POWER CONTROL
[0001] FIELD OF TECHNOLOGY
[0002] The present disclosure relates to wireless communications, including unified transmission configuration indicator based low-layer triggered mobility and multi-transmission and reception point power control.BACKGROUND
[0003] Wireless communications systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems may be capable of supporting communication with multiple users by sharing the available system resources (e.g., time, frequency, and power) . Examples of such multiple-access systems include fourth generation (4G) systems such as Long Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, or LTE-A Pro systems, and fifth generation (5G) systems which may be referred to as New Radio (NR) systems. These systems may employ technologies such as code division multiple access (CDMA) , time division multiple access (TDMA) , frequency division multiple access (FDMA) , orthogonal FDMA (OFDMA) , or discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM) . A wireless multiple-access communications system may include one or more base stations, each supporting wireless communication for communication devices, which may be known as user equipment (UE) .SUMMARY
[0004] The described techniques relate to improved methods, systems, devices, and apparatuses that support unified transmission configuration indicator (TCI) based low-layer triggered mobility (LTM) and multi-transmission and reception point (mTRP) power control. For example, the described techniques provide for a user equipment (UE) configured to communicate with multiple network entities. The UE may communicate with a first network entity and a second network entity as a part of a mobility operation or may communicate with a first transmission and reception point (TRP) and a second TRP as a part of a multi-TRP (mTRP) operation. The UE may communicate with the network entities in accordance with one or more unified transmission configuration indicator (TCI) states. For example, the UE may determine a beam for communicating with the network entities over multiple channels, may determine monitoring occasions, and may determine a timing advance (TA) for a LTM operation based on at least one TCI state. Additionally, or alternatively, the UE may determine a transmission power for communicating with the first TRP and the second TRP based on at least one TCI state. The UE may determine the transmission power based on one or more transmit power control (TPC) commands indicated to the UE and associated with the at least one TCI state.
[0005] A method for wireless communications by a UE is described. The method may include receiving a configuration that indicates a unified TCI state type for communications with at least one of a first network entity or a second network entity via one or more communication channels, receiving a unified TCI state in accordance with the unified TCI state type, the unified TCI state indicative of a beam for the communications with the first network entity, the second network entity, or both, and communicating with the first network entity, the second network entity, or both in accordance with the unified TCI state type and the beam.
[0006] A UE for wireless communications is described. The UE may include one or more memories storing processor executable code, and one or more processors coupled with the one or more memories. The one or more processors may individually or collectively operable to execute the code to cause the UE to receive a configuration that indicates a unified TCI state type for communications with at least one of a first network entity or a second network entity via one or more communication channels, receive a unified TCI state in accordance with the unified TCI state type, the unified TCI state indicative of a beam for the communications with the first network entity, the second network entity, or both, and communicate with the first network entity, the second network entity, or both in accordance with the unified TCI state type and the beam.
[0007] Another UE for wireless communications is described. The UE may include means for receiving a configuration that indicates a unified TCI state type for communications with at least one of a first network entity or a second network entity via one or more communication channels, means for receiving a unified TCI state in accordance with the unified TCI state type, the unified TCI state indicative of a beam for the communications with the first network entity, the second network entity, or both, and means for communicating with the first network entity, the second network entity, or both in accordance with the unified TCI state type and the beam.
[0008] A non-transitory computer-readable medium storing code for wireless communications is described. The code may include instructions executable by one or more processors to receive a configuration that indicates a unified TCI state type for communications with at least one of a first network entity or a second network entity via one or more communication channels, receive a unified TCI state in accordance with the unified TCI state type, the unified TCI state indicative of a beam for the communications with the first network entity, the second network entity, or both, and communicate with the first network entity, the second network entity, or both in accordance with the unified TCI state type and the beam.
[0009] In some examples of the method, user equipment (UEs) , and non-transitory computer-readable medium described herein, the configuration indicates a first unified TCI state type for the communications with the first network entity, where the first network entity may be a candidate cell identified during a lower-layer-triggered mobility (LTM) procedure by the UE.
[0010] In some examples of the method, user equipment (UEs) , and non-transitory computer-readable medium described herein, receiving the configuration may include operations, features, means, or instructions for receiving control information that explicitly identifies the first unified TCI state type.
[0011] In some examples of the method, user equipment (UEs) , and non-transitory computer-readable medium described herein, receiving the configuration may include operations, features, means, or instructions for receiving control information that implicitly identifies the first unified TCI state type through one or more parameters.
[0012] In some examples of the method, user equipment (UEs) , and non-transitory computer-readable medium described herein, the unified TCI state type may be a joint uplink and downlink TCI state type based on the one or more parameters including a first parameter that identifies downlink or joint TCI state configurations for the UE, the one or more parameters not including a second parameter that identifies uplink TCI state configurations for the UE, and the candidate cell being enabled for both downlink communications and uplink communications.
[0013] In some examples of the method, user equipment (UEs) , and non-transitory computer-readable medium described herein, the unified TCI state type may be a separate downlink only TCI state type based on the one or more parameters including a first parameter that identifies downlink or joint TCI state configurations for the UE, the one or more parameters not including a second parameter that identifies uplink TCI state configurations for the UE, and the candidate cell being enabled for downlink communications and not for uplink communications.
[0014] In some examples of the method, user equipment (UEs) , and non-transitory computer-readable medium described herein, the unified TCI state type may be a separate downlink and separate uplink TCI state type based on the one or more parameters including a first parameter that identifies downlink or joint TCI state configurations for the UE and the one or more parameters including a second parameter that identifies uplink TCI state configurations for the UE.
[0015] In some examples of the method, user equipment (UEs) , and non-transitory computer-readable medium described herein, receiving the unified TCI state may include operations, features, means, or instructions for receiving a cell switch command as part of the LTM procedure, where the cell switch command indicates the unified TCI state for the communications with the first network entity.
[0016] In some examples of the method, user equipment (UEs) , and non-transitory computer-readable medium described herein, communicating with the first network entity may include operations, features, means, or instructions for monitoring for one or more of a Type 0A physical downlink control channel (PDCCH) common search space (CSS) set, a Type 1 PDCCH CSS set, or a Type 2 PDCCH CSS set based on a root quasi co-located (QCL) reference signal of the unified TCI state.
[0017] In some examples of the method, user equipment (UEs) , and non-transitory computer-readable medium described herein, communicating with the first network entity may include operations, features, means, or instructions for monitoring for one or more of a Type 0A PDCCH CSS set, a Type 1 PDCCH CSS set, or a Type 2 PDCCH CSS set based on a monitoring occasion pattern that may be common for different unified TCI states.
[0018] In some examples of the method, user equipment (UEs) , and non-transitory computer-readable medium described herein, the unified TCI state type includes at least a joint uplink and downlink TCI state type, a separate downlink only TCI state type, a separate uplink only TCI state type, or a separate downlink and separate uplink TCI state type.
[0019] In some examples of the method, user equipment (UEs) , and non-transitory computer-readable medium described herein, the configuration indicates a first unified TCI state type for the communications with the first network entity and with the second network entity, where the first network entity and the second network entity may be in mTRP communication with the UE and where the first network entity may be a candidate cell identified by the UE.
[0020] In some examples of the method, user equipment (UEs) , and non-transitory computer-readable medium described herein, receiving the configuration may include operations, features, means, or instructions for receiving control information that explicitly identifies the first unified TCI state type.
[0021] In some examples of the method, user equipment (UEs) , and non-transitory computer-readable medium described herein, receiving the configuration may include operations, features, means, or instructions for receiving control information that implicitly identifies the first unified TCI state type through one or more parameters.
[0022] In some examples of the method, user equipment (UEs) , and non-transitory computer-readable medium described herein, the unified TCI state type may be a joint uplink and downlink TCI state type based on the one or more parameters including a first parameter that identifies downlink or joint TCI state configurations for the UE, the one or more parameters not including a second parameter that identifies uplink TCI state configurations for the UE, and the candidate cell being enabled for both downlink communications and uplink communications.
[0023] In some examples of the method, user equipment (UEs) , and non-transitory computer-readable medium described herein, the unified TCI state type may be a separate downlink only TCI state type based on the one or more parameters including a first parameter that identifies downlink or joint TCI state configurations for the UE, the one or more parameters not including a second parameter that identifies uplink TCI state configurations for the UE, and the candidate cell being enabled for downlink communications and not for uplink communications.
[0024] In some examples of the method, user equipment (UEs) , and non-transitory computer-readable medium described herein, the unified TCI state type may be a separate downlink and separate uplink TCI state type based on the one or more parameters including a first parameter that identifies downlink or joint TCI state configurations for the UE and the one or more parameters including a second parameter that identifies uplink TCI state configurations for the UE.
[0025] A method for wireless communications by a UE is described. The method may include receiving a configuration for mTRP communications with a first network entity and a second network entity, where the configuration indicates at least a first closed loop power index value for use in uplink communications with the first network entity, the second network entity, or both, receiving a control message that includes one or more TPC commands for the uplink communications, transmitting a first uplink message to the first network entity in accordance with a first transmit power, where the first transmit power is based on the first closed loop power index value and the one or more TPC commands, and transmit a second uplink message to the second network entity in accordance with a second transmit power, where the second transmit power is based on the first closed loop power index value or a second closed loop power index value included in the configuration, the second transmit power also based on the one or more TPC commands.
[0026] A UE for wireless communications is described. The UE may include one or more memories storing processor executable code, and one or more processors coupled with the one or more memories. The one or more processors may individually or collectively operable to execute the code to cause the UE to receive a configuration for mTRP communications with a first network entity and a second network entity, where the configuration indicates at least a first closed loop power index value for use in uplink communications with the first network entity, the second network entity, or both, receive a control message that includes one or more TPC commands for the uplink communications, transmit a first uplink message to the first network entity in accordance with a first transmit power, where the first transmit power is based on the first closed loop power index value and the one or more TPC commands, and transmit a second uplink message to the second network entity in accordance with a second transmit power, where the second transmit power is based on the first closed loop power index value or a second closed loop power index value included in the configuration, the second transmit power also based on the one or more TPC commands.
[0027] Another UE for wireless communications is described. The UE may include means for receiving a configuration for mTRP communications with a first network entity and a second network entity, where the configuration indicates at least a first closed loop power index value for use in uplink communications with the first network entity, the second network entity, or both, means for receiving a control message that includes one or more TPC commands for the uplink communications, means for transmitting a first uplink message to the first network entity in accordance with a first transmit power, where the first transmit power is based on the first closed loop power index value and the one or more TPC commands, and means for transmit a second uplink message to the second network entity in accordance with a second transmit power, where the second transmit power is based on the first closed loop power index value or a second closed loop power index value included in the configuration, the second transmit power also based on the one or more TPC commands.
[0028] A non-transitory computer-readable medium storing code for wireless communications is described. The code may include instructions executable by one or more processors to receive a configuration for mTRP communications with a first network entity and a second network entity, where the configuration indicates at least a first closed loop power index value for use in uplink communications with the first network entity, the second network entity, or both, receive a control message that includes one or more TPC commands for the uplink communications, transmit a first uplink message to the first network entity in accordance with a first transmit power, where the first transmit power is based on the first closed loop power index value and the one or more TPC commands, and transmit a second uplink message to the second network entity in accordance with a second transmit power, where the second transmit power is based on the first closed loop power index value or a second closed loop power index value included in the configuration, the second transmit power also based on the one or more TPC commands.
[0029] In some examples of the method, user equipment (UEs) , and non-transitory computer-readable medium described herein, the configuration includes the first closed loop power index value and the second closed loop power index value, and where the control message includes a first TPC command and a second TPC command.
[0030] In some examples of the method, user equipment (UEs) , and non-transitory computer-readable medium described herein, the first transmit power may be associated with the first TPC command, the first TPC command may be associated with a first unified TCI state, and the first unified TCI state may be associated with the first closed loop power index value, and where the second transmit power may be associated with the second TPC command, the second TPC command may be associated with a second unified TCI state, and the second unified TCI state may be associated with the second closed loop power index value.
[0031] In some examples of the method, user equipment (UEs) , and non-transitory computer-readable medium described herein, the first transmit power may be associated with the first TPC command, and the first TPC command may be associated with the first closed loop power index value, and where the second transmit power may be associated with the second TPC command, and the second TPC command may be associated with the second closed loop power index value.
[0032] In some examples of the method, user equipment (UEs) , and non-transitory computer-readable medium described herein, the configuration includes the first closed loop power index value but does not include the second closed loop power index value, and where the control message includes a first TPC command.
[0033] In some examples of the method, user equipment (UEs) , and non-transitory computer-readable medium described herein, the first transmit power and the second transmit power may be both associated with the first TPC command, the first TPC command may be associated with both a first unified TCI state and a second unified TCI state, and the first unified TCI state may be associated with the first closed loop power index value and the second unified TCI state may be associated with the first closed loop power index value.
[0034] In some examples of the method, user equipment (UEs) , and non-transitory computer-readable medium described herein, the first network entity may be a first TRP and the second network entity may be a second TRP, and where the first uplink message may be transmitted to the first TRP in accordance with a first unified TCI state and the second uplink message may be transmitted to the second TRP in accordance with a second unified TCI state, and where the first transmit power and the second transmit power may be determined on a per-unified TCI state basis.
[0035] A method for wireless communications by a UE is described. The method may include receiving, while in communication with a source network entity, a configuration for communications between the UE and a target network entity, determining a first TA for the communications between the UE and the target network entity, and communicating with the target network entity in accordance with the first TA as part of a LTM cell switching operation.
[0036] A UE for wireless communications is described. The UE may include one or more memories storing processor executable code, and one or more processors coupled with the one or more memories. The one or more processors may individually or collectively operable to execute the code to cause the UE to receive, while in communication with a source network entity, a configuration for communications between the UE and a target network entity, determine a first TA for the communications between the UE and the target network entity, and communicate with the target network entity in accordance with the first TA as part of a LTM cell switching operation.
[0037] Another UE for wireless communications is described. The UE may include means for receiving, while in communication with a source network entity, a configuration for communications between the UE and a target network entity, means for determining a first TA for the communications between the UE and the target network entity, and means for communicating with the target network entity in accordance with the first TA as part of a LTM cell switching operation.
[0038] A non-transitory computer-readable medium storing code for wireless communications is described. The code may include instructions executable by one or more processors to receive, while in communication with a source network entity, a configuration for communications between the UE and a target network entity, determine a first TA for the communications between the UE and the target network entity, and communicate with the target network entity in accordance with the first TA as part of a LTM cell switching operation.
[0039] Some examples of the method, user equipment (UEs) , and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for determining the first TA for communications between the UE and the target network entity based on a second TA for communications between the UE and the source network entity, a reference signal timing difference (RSTD) between the target network entity and the source network entity, or both.
[0040] In some examples of the method, user equipment (UEs) , and non-transitory computer-readable medium described herein, receiving the configuration may include operations, features, means, or instructions for receiving medium access control-control element (MAC-CE) signaling that may be indicative of the source network entity and the target network entity and of a relationship between the source network entity and the target network entity so as facilitate derivation of the first TA from a second TA based on the relationship, where the media access control (MAC) -CE signaling includes a cell switching command.
[0041] In some examples of the method, user equipment (UEs) , and non-transitory computer-readable medium described herein, receiving the configuration may include operations, features, means, or instructions for receiving a radio resource control (RRC) message that may be indicative of the source network entity and the target network entity and of a relationship between the source network entity and the target network entity so as facilitate derivation of the first TA from a second TA based on the relationship.
[0042] In some examples of the method, user equipment (UEs) , and non-transitory computer-readable medium described herein, the RRC message includes one or more groups of cells, and where the relationship between the source network entity and the target network entity may be that the source network entity and the target network entity may be in a same group.BRIEF DESCRIPTION OF THE DRAWINGS
[0043] FIG. 1 shows an example of a wireless communications system that supports unified transmission configuration indicator based low-layer triggered mobility and multi-transmission and reception point power control in accordance with one or more aspects of the present disclosure.
[0044] FIG. 2 shows an example of a wireless communications system that supports unified transmission configuration indicator based low-layer triggered mobility and multi-transmission and reception point power control in accordance with one or more aspects of the present disclosure.
[0045] FIG. 3 shows an example of a wireless communications system that supports unified transmission configuration indicator based low-layer triggered mobility and multi-transmission and reception point power control in accordance with one or more aspects of the present disclosure.
[0046] FIG. 4 shows an example of a process flow that supports unified transmission configuration indicator based low-layer triggered mobility and multi-transmission and reception point power control in accordance with one or more aspects of the present disclosure.
[0047] FIG. 5 shows an example of a process flow that supports unified transmission configuration indicator based low-layer triggered mobility and multi-transmission and reception point power control in accordance with one or more aspects of the present disclosure.
[0048] FIG. 6 shows an example of a process flow that supports unified transmission configuration indicator based low-layer triggered mobility and multi-transmission and reception point power control in accordance with one or more aspects of the present disclosure.
[0049] FIG. 7 shows an example of a process flow that supports unified transmission configuration indicator based low-layer triggered mobility and multi-transmission and reception point power control in accordance with one or more aspects of the present disclosure.
[0050] FIGs. 8 and 9 show block diagrams of devices that support unified transmission configuration indicator based low-layer triggered mobility and multi-transmission and reception point power control in accordance with one or more aspects of the present disclosure.
[0051] FIG. 10 shows a block diagram of a communications manager that supports unified transmission configuration indicator based low-layer triggered mobility and multi-transmission and reception point power control in accordance with one or more aspects of the present disclosure.
[0052] FIG. 11 shows a diagram of a system including a device that supports unified transmission configuration indicator based low-layer triggered mobility and multi-transmission and reception point power control in accordance with one or more aspects of the present disclosure.
[0053] FIGs. 12 through 16 show flowcharts illustrating methods that support unified transmission configuration indicator based low-layer triggered mobility and multi-transmission and reception point power control in accordance with one or more aspects of the present disclosure.DETAILED DESCRIPTION
[0054] In some wireless communications systems, a UE may be in communications with multiple network entities. In some implementations, the UE may communicate with a first (e.g., source) network entity and a second (e.g., target) network entity as a part of a mobility operation (e.g., lower-layer triggered mobility (LTM) ) . In some other implementations, the UE may communicate with multiple transmission and reception points (TRPs) , which each may be a network entity, as part of multi-TRP (mTRP) communications. The UE may communicate with the network entities over multiple channels and using multiple reference signals, including at least one downlink channel, at least one downlink reference signal, at least one uplink channel, at least one uplink reference signal, or a combination thereof. The UE may use a common beam over the multiple channels. To indicate the common beam, the UE and the network entities may support communication of a unified transmission configuration indicator (TCI) . However, communications in accordance with the unified TCI may not be defined for mobility operations or mTRP applications.
[0055] Various aspects of the present disclosure relate to TCI based LTM and mTRP power control. In some implementations, a UE in communications with a first network entity may receive an indication of a unified TCI state for communicating with a second network entity. The unified TCI state may indicate one or more parameters (e.g., a beam) for the UE to use for communications with the first network entity or the second network entity across one or more channels (e.g., downlink channels, uplink channels, or both) . The indication may be explicit or implicit. The UE may determine one or more monitoring occasions for a physical downlink control channel (PDCCH) common search space (CSS) set based on the TCI state or based on a preconfigured monitoring occasion pattern. Similarly, the UE may determine a timing advance (TA) value for the mobility operation based on the unified TCI state.
[0056] In some other implementations, the UE may be in communications with a first transmission and reception point (TRP) and a second TRP. In such implementations, the UE may receive an indication of a first unified TCI state for communicating with the first TRP and a second TCI state communicating with the second TRP. Additionally, or alternatively, the UE may receive a configuration for multi-TRP (mTRP) operations, including an indication of one or more transmit power control (TPC) commands via a respective one or more close loop index values. The UE may apply the TPC commands (e.g., may adjust a transmission power of the UE) based on the indicated unified TCI states and may communicate with the first TRP and the second TRP in accordance with the transmission power, the first TCI state, and the second TCI state respectively.
[0057] Aspects of the disclosure are initially described in the context of wireless communications systems. Aspects of the disclosure are additionally illustrated by process flows. Aspects of the disclosure are further illustrated by and described with reference to apparatus diagrams, system diagrams, and flowcharts that relate to unified TCI based LTM and mTRP point power control.
[0058] FIG. 1 shows an example of a wireless communications system 100 that supports unified transmission configuration indicator based low-layer triggered mobility and multi-transmission and reception point power control in accordance with one or more aspects of the present disclosure. The wireless communications system 100 may include one or more network entities 105, one or more UEs 115, and a core network 130. In some examples, the wireless communications system 100 may be a Long Term Evolution (LTE) network, an LTE-Advanced (LTE-A) network, an LTE-A Pro network, a New Radio (NR) network, or a network operating in accordance with other systems and radio technologies, including future systems and radio technologies not explicitly mentioned herein.
[0059] The network entities 105 may be dispersed throughout a geographic area to form the wireless communications system 100 and may include devices in different forms or having different capabilities. In various examples, a network entity 105 may be referred to as a network element, a mobility element, a radio access network (RAN) node, or network equipment, among other nomenclature. In some examples, network entities 105 and UEs 115 may wirelessly communicate via one or more communication links 125 (e.g., a radio frequency (RF) access link) . For example, a network entity 105 may support a coverage area 110 (e.g., a geographic coverage area) over which the UEs 115 and the network entity 105 may establish one or more communication links 125. The coverage area 110 may be an example of a geographic area over which a network entity 105 and a UE 115 may support the communication of signals according to one or more radio access technologies (RATs) .
[0060] The UEs 115 may be dispersed throughout a coverage area 110 of the wireless communications system 100, and each UE 115 may be stationary, or mobile, or both at different times. The UEs 115 may be devices in different forms or having different capabilities. Some example UEs 115 are illustrated in FIG. 1. The UEs 115 described herein may be capable of supporting communications with various types of devices, such as other UEs 115 or network entities 105, as shown in FIG. 1.
[0061] As described herein, a node of the wireless communications system 100, which may be referred to as a network node, or a wireless node, may be a network entity 105 (e.g., any network entity described herein) , a UE 115 (e.g., any UE described herein) , a network controller, an apparatus, a device, a computing system, one or more components, or another suitable processing entity configured to perform any of the techniques described herein. For example, a node may be a UE 115. As another example, a node may be a network entity 105. As another example, a first node may be configured to communicate with a second node or a third node. In one aspect of this example, the first node may be a UE 115, the second node may be a network entity 105, and the third node may be a UE 115. In another aspect of this example, the first node may be a UE 115, the second node may be a network entity 105, and the third node may be a network entity 105. In yet other aspects of this example, the first, second, and third nodes may be different relative to these examples. Similarly, reference to a UE 115, network entity 105, apparatus, device, computing system, or the like may include disclosure of the UE 115, network entity 105, apparatus, device, computing system, or the like being a node. For example, disclosure that a UE 115 is configured to receive information from a network entity 105 also discloses that a first node is configured to receive information from a second node.
[0062] In some examples, network entities 105 may communicate with the core network 130, or with one another, or both. For example, network entities 105 may communicate with the core network 130 via one or more backhaul communication links 120 (e.g., in accordance with an S1, N2, N3, or other interface protocol) . In some examples, network entities 105 may communicate with one another via a backhaul communication link 120 (e.g., in accordance with an X2, Xn, or other interface protocol) either directly (e.g., directly between network entities 105) or indirectly (e.g., via a core network 130) . In some examples, network entities 105 may communicate with one another via a midhaul communication link 162 (e.g., in accordance with a midhaul interface protocol) or a fronthaul communication link 168 (e.g., in accordance with a fronthaul interface protocol) , or any combination thereof. The backhaul communication links 120, midhaul communication links 162, or fronthaul communication links 168 may be or include one or more wired links (e.g., an electrical link, an optical fiber link) , one or more wireless links (e.g., a radio link, a wireless optical link) , among other examples or various combinations thereof. A UE 115 may communicate with the core network 130 via a communication link 155.
[0063] One or more of the network entities 105 described herein may include or may be referred to as a base station 140 (e.g., a base transceiver station, a radio base station, an NR base station, an access point, a radio transceiver, a NodeB, an eNodeB (eNB) , a next-generation NodeB or a giga-NodeB (either of which may be referred to as a gNB) , a 5G NB, a next-generation eNB (ng-eNB) , a Home NodeB, a Home eNodeB, or other suitable terminology) . In some examples, a network entity 105 (e.g., a base station 140) may be implemented in an aggregated (e.g., monolithic, standalone) base station architecture, which may be configured to utilize a protocol stack that is physically or logically integrated within a single network entity 105 (e.g., a single RAN node, such as a base station 140) .
[0064] In some examples, a network entity 105 may be implemented in a disaggregated architecture (e.g., a disaggregated base station architecture, a disaggregated RAN architecture) , which may be configured to utilize a protocol stack that is physically or logically distributed among two or more network entities 105, such as an integrated access backhaul (IAB) network, an open RAN (O-RAN) (e.g., a network configuration sponsored by the O-RAN Alliance) , or a virtualized RAN (vRAN) (e.g., a cloud RAN (C-RAN) ) . For example, a network entity 105 may include one or more of a central unit (CU) 160, a distributed unit (DU) 165, a radio unit (RU) 170, a RAN Intelligent Controller (RIC) 175 (e.g., a Near-Real Time RIC (Near-RT RIC) , a Non-Real Time RIC (Non-RT RIC) ) , a Service Management and Orchestration (SMO) 180 system, or any combination thereof. An RU 170 may also be referred to as a radio head, a smart radio head, a remote radio head (RRH) , a remote radio unit (RRU) , or a transmission reception point (TRP) . One or more components of the network entities 105 in a disaggregated RAN architecture may be co-located, or one or more components of the network entities 105 may be located in distributed locations (e.g., separate physical locations) . In some examples, one or more network entities 105 of a disaggregated RAN architecture may be implemented as virtual units (e.g., a virtual CU (VCU) , a virtual DU (VDU) , a virtual RU (VRU)) .
[0065] The split of functionality between a CU 160, a DU 165, and an RU 170 is flexible and may support different functionalities depending on which functions (e.g., network layer functions, protocol layer functions, baseband functions, RF functions, and any combinations thereof) are performed at a CU 160, a DU 165, or an RU 170. For example, a functional split of a protocol stack may be employed between a CU 160 and a DU 165 such that the CU 160 may support one or more layers of the protocol stack and the DU 165 may support one or more different layers of the protocol stack. In some examples, the CU 160 may host upper protocol layer (e.g., layer 3 (L3) , layer 2 (L2) ) functionality and signaling (e.g., Radio Resource Control (RRC) , service data adaption protocol (SDAP) , Packet Data Convergence Protocol (PDCP) ) . The CU 160 may be connected to one or more DUs 165 or RUs 170, and the one or more DUs 165 or RUs 170 may host lower protocol layers, such as layer 1 (L1) (e.g., physical (PHY) layer) or L2 (e.g., radio link control (RLC) layer, medium access control (MAC) layer) functionality and signaling, and may each be at least partially controlled by the CU 160. Additionally, or alternatively, a functional split of the protocol stack may be employed between a DU 165 and an RU 170 such that the DU 165 may support one or more layers of the protocol stack and the RU 170 may support one or more different layers of the protocol stack. The DU 165 may support one or multiple different cells (e.g., via one or more RUs 170) . In some cases, a functional split between a CU 160 and a DU 165, or between a DU 165 and an RU 170 may be within a protocol layer (e.g., some functions for a protocol layer may be performed by one of a CU 160, a DU 165, or an RU 170, while other functions of the protocol layer are performed by a different one of the CU 160, the DU 165, or the RU 170) . A CU 160 may be functionally split further into CU control plane (CU-CP) and CU user plane (CU-UP) functions. A CU 160 may be connected to one or more DUs 165 via a midhaul communication link 162 (e.g., F1, F1-c, F1-u) , and a DU 165 may be connected to one or more RUs 170 via a fronthaul communication link 168 (e.g., open fronthaul (FH) interface) . In some examples, a midhaul communication link 162 or a fronthaul communication link 168 may be implemented in accordance with an interface (e.g., a channel) between layers of a protocol stack supported by respective network entities 105 that are in communication via such communication links.
[0066] In wireless communications systems (e.g., wireless communications system 100) , infrastructure and spectral resources for radio access may support wireless backhaul link capabilities to supplement wired backhaul connections, providing an IAB network architecture (e.g., to a core network 130) . In some cases, in an IAB network, one or more network entities 105 (e.g., IAB nodes 104) may be partially controlled by each other. One or more IAB nodes 104 may be referred to as a donor entity or an IAB donor. One or more DUs 165 or one or more RUs 170 may be partially controlled by one or more CUs 160 associated with a donor network entity 105 (e.g., a donor base station 140) . The one or more donor network entities 105 (e.g., IAB donors) may be in communication with one or more additional network entities 105 (e.g., IAB nodes 104) via supported access and backhaul links (e.g., backhaul communication links 120) . IAB nodes 104 may include an IAB mobile termination (IAB-MT) controlled (e.g., scheduled) by DUs 165 of a coupled IAB donor. An IAB-MT may include an independent set of antennas for relay of communications with UEs 115, or may share the same antennas (e.g., of an RU 170) of an IAB node 104 used for access via the DU 165 of the IAB node 104 (e.g., referred to as virtual IAB-MT (vIAB-MT) ) . In some examples, the IAB nodes 104 may include DUs 165 that support communication links with additional entities (e.g., IAB nodes 104, UEs 115) within the relay chain or configuration of the access network (e.g., downstream) . In such cases, one or more components of the disaggregated RAN architecture (e.g., one or more IAB nodes 104 or components of IAB nodes 104) may be configured to operate according to the techniques described herein.
[0067] In the case of the techniques described herein applied in the context of a disaggregated RAN architecture, one or more components of the disaggregated RAN architecture may be configured to support unified TCI based LTM and mTRP power control as described herein. For example, some operations described as being performed by a UE 115 or a network entity 105 (e.g., a base station 140) may additionally, or alternatively, be performed by one or more components of the disaggregated RAN architecture (e.g., IAB nodes 104, DUs 165, CUs 160, RUs 170, RIC 175, SMO 180) .
[0068] A UE 115 may include or may be referred to as a mobile device, a wireless device, a remote device, a handheld device, or a subscriber device, or some other suitable terminology, where the “device” may also be referred to as a unit, a station, a terminal, or a client, among other examples. A UE 115 may also include or may be referred to as a personal electronic device such as a cellular phone, a personal digital assistant (PDA) , a tablet computer, a laptop computer, or a personal computer. In some examples, a UE 115 may include or be referred to as a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or a machine type communications (MTC) device, among other examples, which may be implemented in various objects such as appliances, or vehicles, meters, among other examples.
[0069] The UEs 115 described herein may be able to communicate with various types of devices, such as other UEs 115 that may sometimes act as relays as well as the network entities 105 and the network equipment including macro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations, among other examples, as shown in FIG. 1.
[0070] The UEs 115 and the network entities 105 may wirelessly communicate with one another via one or more communication links 125 (e.g., an access link) using resources associated with one or more carriers. The term “carrier” may refer to a set of RF spectrum resources having a defined physical layer structure for supporting the communication links 125. For example, a carrier used for a communication link 125 may include a portion of a RF spectrum band (e.g., a bandwidth part (BWP) ) that is operated according to one or more physical layer channels for a given radio access technology (e.g., LTE, LTE-A, LTE-A Pro, NR) . Each physical layer channel may carry acquisition signaling (e.g., synchronization signals, system information) , control signaling that coordinates operation for the carrier, user data, or other signaling. The wireless communications system 100 may support communication with a UE 115 using carrier aggregation or multi-carrier operation. A UE 115 may be configured with multiple downlink component carriers and one or more uplink component carriers according to a carrier aggregation configuration. Carrier aggregation may be used with both frequency division duplexing (FDD) and time division duplexing (TDD) component carriers. Communication between a network entity 105 and other devices may refer to communication between the devices and any portion (e.g., entity, sub-entity) of a network entity 105. For example, the terms “transmitting, ” “receiving, ” or “communicating, ” when referring to a network entity 105, may refer to any portion of a network entity 105 (e.g., a base station 140, a CU 160, a DU 165, a RU 170) of a RAN communicating with another device (e.g., directly or via one or more other network entities 105) .
[0071] The communication links 125 shown in the wireless communications system 100 may include downlink transmissions (e.g., forward link transmissions) from a network entity 105 to a UE 115, uplink transmissions (e.g., return link transmissions) from a UE 115 to a network entity 105, or both, among other configurations of transmissions. Carriers may carry downlink or uplink communications (e.g., in an FDD mode) or may be configured to carry downlink and uplink communications (e.g., in a TDD mode) .
[0072] A carrier may be associated with a particular bandwidth of the RF spectrum and, in some examples, the carrier bandwidth may be referred to as a “system bandwidth” of the carrier or the wireless communications system 100. For example, the carrier bandwidth may be one of a set of bandwidths for carriers of a particular radio access technology (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 megahertz (MHz) ) . Devices of the wireless communications system 100 (e.g., the network entities 105, the UEs 115, or both) may have hardware configurations that support communications using a particular carrier bandwidth or may be configurable to support communications using one of a set of carrier bandwidths. In some examples, the wireless communications system 100 may include network entities 105 or UEs 115 that support concurrent communications using carriers associated with multiple carrier bandwidths. In some examples, each served UE 115 may be configured for operating using portions (e.g., a sub-band, a BWP) or all of a carrier bandwidth.
[0073] Signal waveforms transmitted via a carrier may be made up of multiple subcarriers (e.g., using multi-carrier modulation (MCM) techniques such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform spread OFDM (DFT-S-OFDM) ) . In a system employing MCM techniques, a resource element may refer to resources of one symbol period (e.g., a duration of one modulation symbol) and one subcarrier, in which case the symbol period and subcarrier spacing may be inversely related. The quantity of bits carried by each resource element may depend on the modulation scheme (e.g., the order of the modulation scheme, the coding rate of the modulation scheme, or both) , such that a relatively higher quantity of resource elements (e.g., in a transmission duration) and a relatively higher order of a modulation scheme may correspond to a relatively higher rate of communication. A wireless communications resource may refer to a combination of an RF spectrum resource, a time resource, and a spatial resource (e.g., a spatial layer, a beam) , and the use of multiple spatial resources may increase the data rate or data integrity for communications with a UE 115.
[0074] One or more numerologies for a carrier may be supported, and a numerology may include a subcarrier spacing (Δf) and a cyclic prefix. A carrier may be divided into one or more BWPs having the same or different numerologies. In some examples, a UE 115 may be configured with multiple BWPs. In some examples, a single BWP for a carrier may be active at a given time and communications for the UE 115 may be restricted to one or more active BWPs.
[0075] The time intervals for the network entities 105 or the UEs 115 may be expressed in multiples of a basic time unit which may, for example, refer to a sampling period of Ts=1 / (Δfmax·Nf) seconds, for which Δfmax may represent a supported subcarrier spacing, and Nf may represent a supported discrete Fourier transform (DFT) size. Time intervals of a communications resource may be organized according to radio frames each having a specified duration (e.g., 10 milliseconds (ms) ) . Each radio frame may be identified by a system frame number (SFN) (e.g., ranging from 0 to 1023) .
[0076] Each frame may include multiple consecutively-numbered subframes or slots, and each subframe or slot may have the same duration. In some examples, a frame may be divided (e.g., in the time domain) into subframes, and each subframe may be further divided into a quantity of slots. Alternatively, each frame may include a variable quantity of slots, and the quantity of slots may depend on subcarrier spacing. Each slot may include a quantity of symbol periods (e.g., depending on the length of the cyclic prefix prepended to each symbol period) . In some wireless communications systems 100, a slot may further be divided into multiple mini-slots associated with one or more symbols. Excluding the cyclic prefix, each symbol period may be associated with one or more (e.g., Nf) sampling periods. The duration of a symbol period may depend on the subcarrier spacing or frequency band of operation.
[0077] A subframe, a slot, a mini-slot, or a symbol may be the smallest scheduling unit (e.g., in the time domain) of the wireless communications system 100 and may be referred to as a transmission time interval (TTI) . In some examples, the TTI duration (e.g., a quantity of symbol periods in a TTI) may be variable. Additionally, or alternatively, the smallest scheduling unit of the wireless communications system 100 may be dynamically selected (e.g., in bursts of shortened TTIs (sTTIs)) .
[0078] Physical channels may be multiplexed for communication using a carrier according to various techniques. A physical control channel and a physical data channel may be multiplexed for signaling via a downlink carrier, for example, using one or more of time division multiplexing (TDM) techniques, frequency division multiplexing (FDM) techniques, or hybrid TDM-FDM techniques. A control region (e.g., a control resource set (CORESET) ) for a physical control channel may be defined by a set of symbol periods and may extend across the system bandwidth or a subset of the system bandwidth of the carrier. One or more control regions (e.g., CORESETs) may be configured for a set of the UEs 115. For example, one or more of the UEs 115 may monitor or search control regions for control information according to one or more search space sets, and each search space set may include one or multiple control channel candidates in one or more aggregation levels arranged in a cascaded manner. An aggregation level for a control channel candidate may refer to an amount of control channel resources (e.g., control channel elements (CCEs) ) associated with encoded information for a control information format having a given payload size. Search space sets may include common search space sets configured for sending control information to multiple UEs 115 and UE-specific search space sets for sending control information to a specific UE 115.
[0079] A network entity 105 may provide communication coverage via one or more cells, for example a macro cell, a small cell, a hot spot, or other types of cells, or any combination thereof. The term “cell” may refer to a logical communication entity used for communication with a network entity 105 (e.g., using a carrier) and may be associated with an identifier for distinguishing neighboring cells (e.g., a physical cell identifier (PCID) , a virtual cell identifier (VCID) , or others) . In some examples, a cell also may refer to a coverage area 110 or a portion of a coverage area 110 (e.g., a sector) over which the logical communication entity operates. Such cells may range from smaller areas (e.g., a structure, a subset of structure) to larger areas depending on various factors such as the capabilities of the network entity 105. For example, a cell may be or include a building, a subset of a building, or exterior spaces between or overlapping with coverage areas 110, among other examples.
[0080] A macro cell generally covers a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by the UEs 115 with service subscriptions with the network provider supporting the macro cell. A small cell may be associated with a lower-powered network entity 105 (e.g., a lower-powered base station 140) , as compared with a macro cell, and a small cell may operate using the same or different (e.g., licensed, unlicensed) frequency bands as macro cells. Small cells may provide unrestricted access to the UEs 115 with service subscriptions with the network provider or may provide restricted access to the UEs 115 having an association with the small cell (e.g., the UEs 115 in a closed subscriber group (CSG) , the UEs 115 associated with users in a home or office) . A network entity 105 may support one or multiple cells and may also support communications via the one or more cells using one or multiple component carriers.
[0081] In some examples, a carrier may support multiple cells, and different cells may be configured according to different protocol types (e.g., MTC, narrowband IoT (NB-IoT) , enhanced mobile broadband (eMBB) ) that may provide access for different types of devices.
[0082] In some examples, a network entity 105 (e.g., a base station 140, an RU 170) may be movable and therefore provide communication coverage for a moving coverage area 110. In some examples, different coverage areas 110 associated with different technologies may overlap, but the different coverage areas 110 may be supported by the same network entity 105. In some other examples, the overlapping coverage areas 110 associated with different technologies may be supported by different network entities 105. The wireless communications system 100 may include, for example, a heterogeneous network in which different types of the network entities 105 provide coverage for various coverage areas 110 using the same or different radio access technologies.
[0083] The wireless communications system 100 may support synchronous or asynchronous operation. For synchronous operation, network entities 105 (e.g., base stations 140) may have similar frame timings, and transmissions from different network entities 105 may be approximately aligned in time. For asynchronous operation, network entities 105 may have different frame timings, and transmissions from different network entities 105 may, in some examples, not be aligned in time. The techniques described herein may be used for either synchronous or asynchronous operations.
[0084] The wireless communications system 100 may be configured to support ultra-reliable communications or low-latency communications, or various combinations thereof. For example, the wireless communications system 100 may be configured to support ultra-reliable low-latency communications (URLLC) . The UEs 115 may be designed to support ultra-reliable, low-latency, or critical functions. Ultra-reliable communications may include private communication or group communication and may be supported by one or more services such as push-to-talk, video, or data. Support for ultra-reliable, low-latency functions may include prioritization of services, and such services may be used for public safety or general commercial applications. The terms ultra-reliable, low-latency, and ultra-reliable low-latency may be used interchangeably herein.
[0085] In some examples, a UE 115 may be configured to support communicating directly with other UEs 115 via a device-to-device (D2D) communication link 135 (e.g., in accordance with a peer-to-peer (P2P) , D2D, or sidelink protocol) . In some examples, one or more UEs 115 of a group that are performing D2D communications may be within the coverage area 110 of a network entity 105 (e.g., a base station 140, an RU 170) , which may support aspects of such D2D communications being configured by (e.g., scheduled by) the network entity 105. In some examples, one or more UEs 115 of such a group may be outside the coverage area 110 of a network entity 105 or may be otherwise unable to or not configured to receive transmissions from a network entity 105. In some examples, groups of the UEs 115 communicating via D2D communications may support a one-to-many (1: M) system in which each UE 115 transmits to each of the other UEs 115 in the group. In some examples, a network entity 105 may facilitate the scheduling of resources for D2D communications. In some other examples, D2D communications may be carried out between the UEs 115 without an involvement of a network entity 105.
[0086] In some systems, a D2D communication link 135 may be an example of a communication channel, such as a sidelink communication channel, between vehicles (e.g., UEs 115) . In some examples, vehicles may communicate using vehicle-to-everything (V2X) communications, vehicle-to-vehicle (V2V) communications, or some combination of these. A vehicle may signal information related to traffic conditions, signal scheduling, weather, safety, emergencies, or any other information relevant to a V2X system. In some examples, vehicles in a V2X system may communicate with roadside infrastructure, such as roadside units, or with the network via one or more network nodes (e.g., network entities 105, base stations 140, RUs 170) using vehicle-to-network (V2N) communications, or with both.
[0087] The core network 130 may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. The core network 130 may be an evolved packet core (EPC) or 5G core (5GC) , which may include at least one control plane entity that manages access and mobility (e.g., a mobility management entity (MME) , an access and mobility management function (AMF) ) and at least one 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) ) . The control plane entity may manage non-access stratum (NAS) functions such as mobility, authentication, and bearer management for the UEs 115 served by the network entities 105 (e.g., base stations 140) associated with the core network 130. User IP packets may be transferred through the user plane entity, which may provide IP address allocation as well as other functions. The user plane entity may be connected to IP services 150 for one or more network operators. The IP services 150 may include access to the Internet, Intranet (s) , an IP Multimedia Subsystem (IMS) , or a Packet-Switched Streaming Service.
[0088] The wireless communications system 100 may operate using one or more frequency bands, which may be in the range of 300 megahertz (MHz) to 300 gigahertz (GHz) . Generally, the region from 300 MHz to 3 GHz is known as the ultra-high frequency (UHF) region or decimeter band because the wavelengths range from approximately one decimeter to one meter in length. UHF waves may be blocked or redirected by buildings and environmental features, which may be referred to as clusters, but the waves may penetrate structures sufficiently for a macro cell to provide service to the UEs 115 located indoors. Communications using UHF waves may be associated with smaller antennas and shorter ranges (e.g., less than 100 kilometers) compared to communications using the smaller frequencies and longer waves of the high frequency (HF) or very high frequency (VHF) portion of the spectrum below 300 MHz.
[0089] The wireless communications system 100 may utilize both licensed and unlicensed RF spectrum bands. For example, the wireless communications system 100 may employ License Assisted Access (LAA) , LTE-Unlicensed (LTE-U) radio access technology, or NR technology using an unlicensed band such as the 5 GHz industrial, scientific, and medical (ISM) band. While operating using unlicensed RF spectrum bands, devices such as the network entities 105 and the UEs 115 may employ carrier sensing for collision detection and avoidance. In some examples, operations using unlicensed bands may be based on a carrier aggregation configuration in conjunction with component carriers operating using a licensed band (e.g., LAA) . Operations using unlicensed spectrum may include downlink transmissions, uplink transmissions, P2P transmissions, or D2D transmissions, among other examples.
[0090] A network entity 105 (e.g., a base station 140, an RU 170) or a UE 115 may be equipped with multiple antennas, which may be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communications, or beamforming. The antennas of a network entity 105 or a UE 115 may be located within one or more antenna arrays or antenna panels, which may support MIMO operations or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays may be co-located at an antenna assembly, such as an antenna tower. In some examples, antennas or antenna arrays associated with a network entity 105 may be located at diverse geographic locations. A network entity 105 may include an antenna array with a set of rows and columns of antenna ports that the network entity 105 may use to support beamforming of communications with a UE 115. Likewise, a UE 115 may include one or more antenna arrays that may support various MIMO or beamforming operations. Additionally, or alternatively, an antenna panel may support RF beamforming for a signal transmitted via an antenna port.
[0091] The network entities 105 or the UEs 115 may use MIMO communications to exploit multipath signal propagation and increase spectral efficiency by transmitting or receiving multiple signals via different spatial layers. Such techniques may be referred to as spatial multiplexing. The multiple signals may, for example, be transmitted by the transmitting device via different antennas or different combinations of antennas. Likewise, the multiple signals may be received by the receiving device via different antennas or different combinations of antennas. Each of the multiple signals may be referred to as a separate spatial stream and may carry information associated with the same data stream (e.g., the same codeword) or different data streams (e.g., different codewords) . Different spatial layers may be associated with different antenna ports used for channel measurement and reporting. MIMO techniques include single-user MIMO (SU-MIMO) , for which multiple spatial layers are transmitted to the same receiving device, and multiple-user MIMO (MU-MIMO) , for which multiple spatial layers are transmitted to multiple devices.
[0092] Beamforming, which may also be referred to as spatial filtering, directional transmission, or directional reception, is a signal processing technique that may be used at a transmitting device or a receiving device (e.g., a network entity 105, a UE 115) to shape or steer an antenna beam (e.g., a transmit beam, a receive beam) along a spatial path between the transmitting device and the receiving device. Beamforming may be achieved by combining the signals communicated via antenna elements of an antenna array such that some signals propagating along particular orientations with respect to an antenna array experience constructive interference while others experience destructive interference. The adjustment of signals communicated via the antenna elements may include a transmitting device or a receiving device applying amplitude offsets, phase offsets, or both to signals carried via the antenna elements associated with the device. The adjustments associated with each of the antenna elements may be defined by a beamforming weight set associated with a particular orientation (e.g., with respect to the antenna array of the transmitting device or receiving device, or with respect to some other orientation) .
[0093] A network entity 105 or a UE 115 may use beam sweeping techniques as part of beamforming operations. For example, a network entity 105 (e.g., a base station 140, an RU 170) may use multiple antennas or antenna arrays (e.g., antenna panels) to conduct beamforming operations for directional communications with a UE 115. Some signals (e.g., synchronization signals, reference signals, beam selection signals, or other control signals) may be transmitted by a network entity 105 multiple times along different directions. For example, the network entity 105 may transmit a signal according to different beamforming weight sets associated with different directions of transmission. Transmissions along different beam directions may be used to identify (e.g., by a transmitting device, such as a network entity 105, or by a receiving device, such as a UE 115) a beam direction for later transmission or reception by the network entity 105.
[0094] Some signals, such as data signals associated with a particular receiving device, may be transmitted by transmitting device (e.g., a transmitting network entity 105, a transmitting UE 115) along a single beam direction (e.g., a direction associated with the receiving device, such as a receiving network entity 105 or a receiving UE 115) . In some examples, the beam direction associated with transmissions along a single beam direction may be determined based on a signal that was transmitted along one or more beam directions. For example, a UE 115 may receive one or more of the signals transmitted by the network entity 105 along different directions and may report to the network entity 105 an indication of the signal that the UE 115 received with a highest signal quality or an otherwise acceptable signal quality.
[0095] In some examples, transmissions by a device (e.g., by a network entity 105 or a UE 115) may be performed using multiple beam directions, and the device may use a combination of digital precoding or beamforming to generate a combined beam for transmission (e.g., from a network entity 105 to a UE 115) . The UE 115 may report feedback that indicates precoding weights for one or more beam directions, and the feedback may correspond to a configured set of beams across a system bandwidth or one or more sub-bands. The network entity 105 may transmit a reference signal (e.g., a cell-specific reference signal (CRS) , a channel state information reference signal (CSI-RS)) , which may be precoded or unprecoded. The UE 115 may provide feedback for beam selection, which may be a precoding matrix indicator (PMI) or codebook-based feedback (e.g., a multi-panel type codebook, a linear combination type codebook, a port selection type codebook) . Although these techniques are described with reference to signals transmitted along one or more directions by a network entity 105 (e.g., a base station 140, an RU 170) , a UE 115 may employ similar techniques for transmitting signals multiple times along different directions (e.g., for identifying a beam direction for subsequent transmission or reception by the UE 115) or for transmitting a signal along a single direction (e.g., for transmitting data to a receiving device) .
[0096] A receiving device (e.g., a UE 115) may perform reception operations in accordance with multiple receive configurations (e.g., directional listening) when receiving various signals from a transmitting device (e.g., a network entity 105) , such as synchronization signals, reference signals, beam selection signals, or other control signals. For example, a receiving device may perform reception in accordance with multiple receive directions by receiving via different antenna subarrays, by processing received signals according to different antenna subarrays, by receiving according to different receive beamforming weight sets (e.g., different directional listening weight sets) applied to signals received at multiple antenna elements of an antenna array, or by processing received signals according to different receive beamforming weight sets applied to signals received at multiple antenna elements of an antenna array, any of which may be referred to as “listening” according to different receive configurations or receive directions. In some examples, a receiving device may use a single receive configuration to receive along a single beam direction (e.g., when receiving a data signal) . The single receive configuration may be aligned along a beam direction determined based on listening according to different receive configuration directions (e.g., a beam direction determined to have a highest signal strength, highest signal-to-noise ratio (SNR) , or otherwise acceptable signal quality based on listening according to multiple beam directions) .
[0097] The wireless communications system 100 may be a packet-based network that operates according to a layered protocol stack. In the user plane, communications at the bearer or PDCP layer may be IP-based. An RLC layer may perform packet segmentation and reassembly to communicate via logical channels. A MAC layer may perform priority handling and multiplexing of logical channels into transport channels. The MAC layer also may implement error detection techniques, error correction techniques, or both to support retransmissions to improve link efficiency. In the control plane, an RRC layer may provide establishment, configuration, and maintenance of an RRC connection between a UE 115 and a network entity 105 or a core network 130 supporting radio bearers for user plane data. A PHY layer may map transport channels to physical channels.
[0098] The UEs 115 and the network entities 105 may support retransmissions of data to increase the likelihood that data is received successfully. Hybrid automatic repeat request (HARQ) feedback is one technique for increasing the likelihood that data is received correctly via a communication link (e.g., a communication link 125, a D2D communication link 135) . HARQ may include a combination of error detection (e.g., using a cyclic redundancy check (CRC) ) , forward error correction (FEC) , and retransmission (e.g., automatic repeat request (ARQ) ) . HARQ may improve throughput at the MAC layer in poor radio conditions (e.g., low signal-to-noise conditions) . In some examples, a device may support same-slot HARQ feedback, in which case the device may provide HARQ feedback in a specific slot for data received via a previous symbol in the slot. In some other examples, the device may provide HARQ feedback in a subsequent slot, or according to some other time interval.
[0099] In some implementations, a UE 115 in communications with a first network entity 105 may receive an indication of a unified TCI state for communicating with a second network entity 105. The unified TCI state may indicate one or more parameters (e.g., a common beam) for the UE 115 to use for communications with the first network entity 105 or the second network entity 105 across one or more channels (e.g., downlink channels, uplink channels, or both) . For example, the UE 115 may communicate with the second network entity 105 according to the TCI state as a part of a mobility operation (e.g., an LTM operation) . The TCI state may be a joint TCI state, a separate downlink TCI state, or a separate uplink TIC state. In some examples, the UE 115 may receive a configuration indicating (e.g., explicitly, implicitly) the unified TCI state. In some cases, the UE 115 may determine monitoring occasions for a physical downlink control channel PDCCH CSS set based on the TCI state or based on a preconfigured monitoring occasion pattern. Similarly, the UE 115 may determine a TA value for the mobility operation. For example, the UE 115 may receive information associated with the first network entity 105, the second network entity 105, or both, and may determine the TA based on the information.
[0100] In some other implementations, the UE 115 may be in communications with a first TRP and a second TRP. In such implementations, the first TRP may be a first network entity 105, and the second TRP may be a second network entity 105. In some examples, the UE 115 may receive an indication of a first unified TCI state for communicating with the first TRP and a second TCI state communicating with the second TRP. Additionally, or alternatively, the UE 115 may receive a configuration for mTRP operations, including an indication of one or more TPC commands via a respective one or more close loop index values. For example, the UE 115 may be configured with one close loop index value or two close loop index values, which may indicate a respective one TPC command or two TPC commands. The close loop index values may be associated with the first TCI state and the second TCI state. In some examples, the UE 115 may apply the TPC commands (e.g., may adjust a transmission power of signaling from the UE 115) based on the indicated TCI states and may communicate (e.g., via uplink signaling) with the first TRP and the second TRP in accordance with the TPC commands indicated in the first TCI state and the second TCI state.
[0101] FIG. 2 shows an example of a wireless communications system 200 that supports unified transmission configuration indicator based low-layer triggered mobility and multi-transmission and reception point power control in accordance with one or more aspects of the present disclosure. The wireless communications system 200 may include a UE 115-a in communication with multiple network entities 105, including source network entity 105-a, target network entity 105-b, candidate network entity 105-c, and candidate network entity 105-d which may be examples of corresponding devices as described herein, including with reference to FIG. 1. In some examples, the network entities 105 may each operate according to a same frequency band or a different frequency band. The UE 115-a may communicate with each of the network entities 105 via a respective communication link, which may be a cellular (e.g., New Radio (NR) , sidelink) communications link. Each network entity 105 may be associated with a respective serving cell (e.g., a special cell (SPcell) ) . For example, the source network entity 105-a may be associated with a source cell 205-a, the target network entity 105-b may be associated with a target cell 205-b, the candidate network entity 105-c may be associated with a candidate cell 205-c, and the candidate network entity 105-d may be associated with a candidate cell 205-d. In some examples, the UE 115-a may be configured (e.g., preconfigured) with a set of serving cells 210 including the source cell 205-a, the target cell 205-b, the candidate cell 205-c, and the candidate cell 205-d.
[0102] In some implementations, the UE 115-a may be in communications with the source network entity 105-a. For example, the UE 115-a may be within a geographic region (e.g., a coverage area) associated with the source cell 205-a. In some examples, the UE 115-a may exit the coverage area associated with the source cell 205-a and may enter a coverage area associated with the target cell 205-b. In such examples, the UE 115-a may perform a mobility operation (e.g., a LTM operation) to determine (e.g., detect) another network entity 105 (e.g., the target network entity 105-b) for performing communications with. For example, the UE 115-a may receive an indication of an updated SPcell for communications via control signaling (e.g., Layer 1 (L1) signaling, Layer 2 (L2) signaling) and may perform a cell switching operation (e.g., inter-frequency handover, intra-frequency handover) to switch communicating from the source cell 205-a (e.g., the source network entity 105-a) to the target cell 205-b (e.g., the target network entity 105-b) . In some cases, the UE may enter an area in which the target cell 205-b and candidate cell 205-c or the candidate cell 205-d may overlap (e.g., in space) , and the UE 115-a may perform an LTM mobility operation to select a network entity 105 (e.g., the target network entity 105-b) for communications.
[0103] The UE 115-a may communicate with the network entity 105 (e.g., the source network entity 105-a, the target network entity 105-b, the candidate network entity 105-c, the candidate network entity 105-d) over multiple channels via a common communication beam. To communicate the common beam for communications with the network entity 105, the UE 115-a and the network entities 105 may support communication of a unified TCI. The unified TCI may indicate a TCI state (e.g., a TCI mode) , which may include one or more communication parameters (e.g., a channel) for communicating with the network entities 105. In some examples, the UE 115-a may receive a cell switching command indicating the TCI state.
[0104] For example, the unified TCI may indicate a joint TCI state, where the UE 115-a may communicate with the network entity 105 via at least one downlink channel and at least one uplink channel using the common beam. The unified TCI may include an indication of at least one UE-specific channel (e.g., a PDCCH, a physical downlink shared channel (PDSCH) , a physical uplink control channel (PUCCH) , a physical uplink shared channel (PUSCH) ) , an indication of a CSI-RS, or both.
[0105] In some other examples, the unified TCI may indicate a separate downlink TCI state, where the UE 115-a may communicate with the network entity 105 via multiple DL channels, reference signals, or both, using the common beam. In such other examples, the unified TCI may include an indication of at least one UE-specific downlink channel (e.g., a PDCCH, a PDSCH) , an indication of a channel state information reference signal (CSI-RS) , or both. In yet some other examples, the unified TCI state may indicate a separate uplink TCI state, where the UE 115-a may communicate with the network entity 105 via multiple uplink channels, reference signals, or both, using the common beam. In such other examples, the unified TCI may include an indication of at least one UE-specific uplink channel (e.g., a PUCCH, a PUSCH) .
[0106] Each network entity 105 (e.g., the target network entity 105-b, the candidate network entity 105-c, the candidate network entity 105-d) may transmit an indication of a TCI state associated with the respective network entity 105 to the UE 115-a. For example, the UE 115-a may receive a TCI state configuration for a serving cell (e.g., the target cell 205-b, the candidate cell 205-c, the candidate cell 205-d) and may determine a TCI state for communicating with a respective network entity 105 (e.g., the target network entity 105-b, the candidate network entity 105-c, the candidate network entity 105-d) associated with the serving cell based on the TCI state configuration. The TCI state configuration may indicate a joint TCI state or a separate TCI state (e.g., a separate downlink TCI state, a separate uplink TCI state)
[0107] In some examples, the TCI state configuration may explicitly indicate the TCI state via one or more fields (e.g., information element (IE) . For example, the TCI state configuration may include at least one field (e.g., IE unifiedTCI-StateType-r17) indicating whether the TCI state is a joint TCI state or a separate TCI state. Alternatively, the TCI state configuration may implicitly indicate the TCI state via one or more fields. In some cases, the target cell 205-b may transmit a TCI state configuration (e.g., a radio resource control (RRC) configuration) including a first field (e.g., RRC IE dl-OrJointTCI-StateList) . If the target cell 205-b is enabled to communicate over downlink and uplink, the UE 115-a may determine, from the first field, that the target cell 205-b is configured to operate according to a joint TCI state. If the target cell 205-b is enabled to communicate over downlink, the UE 115-a may determine that the target cell 205-b is configured to operate according to a separate downlink TCI state. In some other cases, the target cell 205-b may transmit a TCI state configuration including the first field and a second field (e.g., RRC IE TCL-UL-StateList) , and the UE 115-a may determine that the target cell 205-b is configured to operate according to a separate downlink TCI state and a separate uplink TCI state based on the fields.
[0108] After performing a cell switching operation (e.g., an LTM cell switch) , the UE 115-a may determine monitoring occasions for communicating with the target cell 205-b. The UE 115-a may determine monitoring occasions for Type 0A PDCCH Common Search Space (CSS) sets, Type 1 PDCCH sets, Type 2 PDCCH CSS sets, or any combination thereof. In some examples, the monitoring occasions may be based on the TCI state indicated in the cell switch command until the UE 115-a receives an indication of a new TCI state that is activated for the CORESETs associated with the PDCCH CSS sets. For example, the UE may determine the monitoring occasions based on a root quasi co-located (QCL) reference signal of the TCI state (e.g., a synchronization signal block (SSB) ) . In some cases, different monitoring occasions may be associated with different SSBs. In some other examples, the monitoring occasions may be based on a preconfigured or predetermined monitoring occasion pattern. In some cases, the pattern may be shared (e.g., common) between the different TCI states (e.g., joint TCI state, separate TCI state) .
[0109] In some implementations, the UE 115-a may determine a TA for communications with the target cell 205-b. The UE 115-a may determine the TA for the target cell 205-b based on a TA for the source cell 205-a and a reference signal timing difference (RSTD) between the source cell 205-a and the target cell 205-b. In some examples, the UE 115-a may receive signaling (e.g., medium access control-control element (MAC-CE) signaling) indicating for the UE 115-a to determine the TA. The MAC-CE signaling may indicate a pair of cells for the UE 115-a to use to determine the TA. For example, a core network may be aware of the source cell 205-a and the target cell 205-b, and may adapt signaling to include information associated with source cell 205-a and the target cell 205-b. For example, the UE 115-a may receive a cell switching command from the core network including information associated with the source cell 205-a and the target cell 205-b.
[0110] In some other examples, the UE 115-a may be configured (e.g., via RRC signaling) to determine the TA for multiple serving cells. For example, each network entity 105 (e.g., the target network entity 105-b, the candidate network entity 105-c, the candidate network entity 105-d) may provide the UE 115-a with cell information, and the UE 115-a may be configured to determine the TA for each serving cell in the set of serving cells 210. For example, if the UE 115-a is performing cell switching from the source cell 205-a to the target cell 205-b, the configuration associated with the target cell 205-b may include information for the source cell 205-a. Similarly, if the UE 115-a is performing cell switching from the candidate cell 205-c to the candidate cell 205-d, the configuration associated with the candidate cell 205-d (e.g., target) may include information for the candidate cell 205-c (e.g., source) . Additionally, or alternatively, the UE 115-a may be configured to estimate the TA for groups of cells. For example, the UE 115-a may receive an indication of a TA estimation group (e.g., source cell 025-a and target cell 205-b, candidate cell 205-c and candidate cell 205-d) and may estimate the TA for communicating between serving cells of the group.
[0111] FIG. 3 shows an example of a wireless communications system 300 that supports unified transmission configuration indicator based low-layer triggered mobility and multi-transmission and reception point power control in accordance with one or more aspects of the present disclosure. The wireless communications system 300 may include a UE 115-b, which may be an example of a corresponding UE 115 as described with reference to FIG. 1 or a UE 115-a as described with reference to FIG. 2. The UE 115-b may support multi-transmission-and-reception point (mTRP) operations. For example, the UE 115-b may communicate with a first transmission and reception point (TRP) TRP-A 305-a and a second TRP TRP-B 305-b. In some examples, TRP-A 305-a and TRP-B 305-b may be network entities, which may be examples of corresponding devices as described herein, including with reference to FIG. 1.
[0112] In some examples, the UE 115-b may perform mTRP operations in accordance with one or more unified TCI states. For example, first communications 310 (e.g., downlink communications 310-a, uplink communications 310-b) between the UE 115-b and the TRP-A 305-a may be performed (e.g., transceived) in accordance with a first TCI state, and second communications 315 (e.g., downlink communications 315-a, uplink communications 315-b) between the UE 115-b and the TRP-B 305-b may be performed in accordance with a second TCI state. The UE 115-b may receive a configuration for the TCI state in accordance with the TCI state configuration as described with reference to FIG. 2. For example, the UE 115-b may receive an explicit configuration or an implicit configuration for the unified TCI state. First communications 310 and second communications 315 may be performed by the UE 115-b simultaneously or at different times. For example, the UE 115-b may support half-duplex or full-duplex communications and accordingly may receive first communications 310, such as downlink control information (DCI) 320-a from the TRP-A 305-a and may transmit second communications 315, such as an uplink transmission 325-b, to the TRP-B 305-b simultaneously. Conversely, the UE 115-b may receive second communications 315, such as DCI 320-b from the TRP-B 305-b and may transmit first communications 310, such as an uplink transmission 325-a, to the TRP-A 305-a simultaneously.
[0113] The mTRP operations at the UE 115-b may be based on a DCI format, such as a single DCI (sDCI) format or a multi-DCI format. The sDCI format may be associated with a slot structure that indicates a single DCI (e.g., the DCI 320-a, the DCI 320-b) , while the multi-DCI format may be associated with a slot structure that indicates multiple DCI. In some examples, the DCI may be configured according to a DCI 1_1 format, a DCI 1_2 format, a DCI 0_1 format, a DCI 0_2 format, or any combination thereof.
[0114] In some examples, mTRP operations may include a power control operation. For example, the UE 115-b may perform power control on uplink transmissions 325 (e.g., uplink transmission 325-a, uplink transmission 325-b) . The UE may determine parameters for the power control operation based on a configured TCI state associated with first communications 310 and the TRP-A 305-a, second communications 315 and the TRP-B 305-b, or both. For example, the UE 115-b may configured (e.g., via RRC signaling) with one or more close loop values. In some implementations, the UE 115-b may receive a DCI 320 (e.g., DCI 320-a, DCI 320-b) indicating for the UE 115-b to perform closed-loop power control. The DCI 320 may include one or more transmit power control (TPC) fields to indicate whether the UE 115-b supports performing closed-loop power control for one or more TRPs 305 (e.g., the TRP-A 305-a, the TRP-B 305-b) .
[0115] In some examples, the UE 115-b may receive a configuration with two configured close loop index values. For example, the UE 115-b may receive the DCI 320 including two TPC fields, where each TPC field indicates a TPC command. Each close loop index value may be associated with a different TCI state. For example, in some cases where the UE 115-b receives the DCI 320 including two TPC fields, the DCI 320 may indicate two TPC commands. In some cases, the indicated TPC commands may apply to uplink transmissions 325 (e.g., transmissions, repetitions, retransmissions) that map to the respective TCI states. For example, the UE 115-b may transmit uplink transmissions 325-a to the TRP-A 305-a according to a TPC command for first TCI state and may transmit uplink transmissions 325-b to the TRP-B 305-b according to a TPC command for the second TCI state. In some other cases, the indicated TPC commands may apply to uplink transmissions 325 that map to the configured close loop index values.
[0116] In some other examples, the UE 115-b may receive a configuration with one configured close loop index value. For example, the UE 115-b may receive the DCI 320 including one TPC field, where the TPC field indicates a TPC command. The DCI 320 may configure one TPC field (e.g., and may not configure the second TPC field) to indicate the TPC command. In such examples, the indicated TPC command may apply to uplink transmissions 325 mapped to both the first TCI state and the second TCI state. For example, the UE 115-b may transmit uplink transmissions 325-a to the TRP-A 305-a according to the TPC command and may transmit uplink transmissions 325-b to the TRP-B 305-b according to the TPC command.
[0117] The UE 115-b may determine the transmission power for uplink transmissions 325 according to Equation 1.
[0118] may represent a configured maximum output power, may represent an open loop power control value, may represent a bandwidth for assigned PUSCH resources, PLb, f, c (qd, t) may represent an estimated downlink pathloss, and fb, f, c (i, lt) may represent a PUSCH power control adjustment state. In Equation 1, μ may represent a subcarrier spacing (SCS) configuration. may be determined according to a quantity of bits per resource element (BPRE) allocated to the PUSCH. The BPRE may be defined according to Equation 2.
[0119] r may represent a code block index, C may represent a quantity of transmitted code blocks, Kr may represent a code block size, and NRE may represent a quantity of resource elements allocated to the PUSCH. In Equation 2, μ may represent a ratio between a quantity of layers associated with the PUSCH transmission occasion to a total quantity of layers across multiple (e.g., two) overlapping PUSCH transmission occasions.
[0120] FIG. 4 shows an example of a process flow 400 that supports unified transmission configuration indicator based low-layer triggered mobility and multi-transmission and reception point power control in accordance with one or more aspects of the present disclosure. The process flow 400 may implement or be implemented by aspects of the wireless communications system 100 and the wireless communications system 200, as described with reference to FIGs. 1 and 2. For instance, in the example of FIG. 4, a UE 115-c may be in communication with a first network entity 105-e and a second network entity 105-f, which may be examples of devices described herein with reference to FIG. 1 or FIG. 2. In the following description of the process flow 400, the operations between the UE 115-c, the first network entity 105-e, and the second network entity 105-f may be performed in a different order than the example shown, or the operations between the UE 115-c, the first network entity 105-e, and the second network entity 105-f may be performed in different orders at different times. Some operations may also be omitted from the process flow 400, and other operations may be added to the process flow 400.
[0121] At 405, the UE 115-c may receive a configuration that indicates a unified TCI state type for communications with at least one of the first network entity 105-e or the second network entity 105-f via one or more communication channels. In some examples, the configuration may indicate a first unified TCI state type for the communications with the first network entity. In such examples, the first network entity 105-e may be associated with a candidate cell identified during a LTM procedure by the UE 115-c. In some implementations, the UE 115-c may receive control information that explicitly identifies the first unified TCI state type. Additionally, or alternatively, the UE 115-c may receive control information that implicitly identifies the first unified TCI state type through one or more parameters.
[0122] In some examples, the unified TCI state type may include at least a joint uplink and downlink TCI state type, a separate downlink only TCI state type, a separate uplink only TCI state type, or a separate downlink and separate uplink TCI state type. For example, the unified TCI state type may be a joint uplink and downlink TCI state type based on the one or more parameters including a first parameter that identifies downlink or joint TCI state configurations for the UE 115-c. The one or more parameters may not include a second parameter that identifies uplink TCI state configurations for the UE 115-c, and the candidate cell may be enabled for both downlink communications and uplink communications.
[0123] In some other examples, the unified TCI state type may be a separate downlink only TCI state type based on the one or more parameters including a first parameter that identifies downlink or joint TCI state configurations for the UE 115-c. In such other examples, the one or more parameters may not include a second parameter that identifies uplink TCI state configurations for the UE 115-c, and the candidate cell may be enabled for downlink communications and not for uplink communications.
[0124] In yet some other examples, the unified TCI state type is a separate downlink and separate uplink TCI state type based on the one or more parameters including a first parameter that identifies downlink or joint TCI state configurations for the UE 115-c. In such other examples, the one or more parameters may include a second parameter that identifies uplink TCI state configurations for the UE 115-c.
[0125] At 410, the UE 115-c may receive a unified TCI state in accordance with the unified TCI state type, the unified TCI state indicative of a beam for the communications with the first network entity 105-e, the second network entity 105-f, or both. In some examples, the UE 115-c may receive a cell switch command as part of the LTM procedure. The cell switch command may indicate the unified TCI state for the communications with the first network entity 105-e.
[0126] The UE 115-c may communicate with the first network entity 105-e, the second network entity 105-f, or both in accordance with the unified TCI state type and the beam. For example, at 415, the UE 115-c may communicate with the first network entity 105-e. Similarly, at 420, the UE 115-c may communicate with the second network entity 105-f.
[0127] At 425, the UE 115-c may monitor for one or more PDCCH CSS. For example, the UE 115-c may monitor for one or more of a Type 0A PDCCH CSS set, a Type 1 PDCCH CSS set, or a Type 2 PDCCH CSS set based on a root QCL reference signal of the unified TCI state. Additionally, or alternatively, the UE 115-c may monitor for one or more of a Type 0A PDCCH CSS set, a Type 1 PDCCH CSS set, or a Type 2 PDCCH CSS set based on a monitoring occasion pattern that is common for different unified TCI states.
[0128] FIG. 5 shows an example of a process flow 500 that supports unified transmission configuration indicator based low-layer triggered mobility and multi-transmission and reception point power control in accordance with one or more aspects of the present disclosure. The process flow 500 may implement or be implemented by aspects of the wireless communications system 100 and the wireless communications system 200, as described with reference to FIGs. 1 and 2. For instance, in the example of FIG. 5, a UE 115-d may be in communication with a first TRP 505-a and a second TRP 505-b, which may be examples of devices described herein with reference to FIG. 2. In the following description of the process flow 500, the operations between the UE 115-d, the first TRP 505-a, and the second TRP 505-b may be performed in a different order than the example shown, or the operations between the UE 115-d, the first TRP 505-a, and the second TRP 505-b may be performed in different orders at different times. Some operations may also be omitted from the process flow 500, and other operations may be added to the process flow 500.
[0129] At 510, the UE 115-d may receive a configuration that indicates a unified TCI state type for communications with at least one of the first TRP 505-a or the second TRP 505-b via one or more communication channels. In some examples, the configuration may indicate a first unified TCI state type for the communications with the first TRP 505-a and with the second TRP 505-b. In such examples, the first TRP 505-a and the second TRP 505-b may be in mTRP communication with the UE 115-d and the first TRP 505-a may be a candidate cell identified by the UE 115-d. In some implementations, the UE 115-d may receive control information that explicitly identifies the first unified TCI state type. Additionally, or alternatively, the UE 115-d may receive control information that implicitly identifies the first unified TCI state type through one or more parameters.
[0130] In some examples, the unified TCI state type may include at least a joint uplink and downlink TCI state type, a separate downlink only TCI state type, a separate uplink only TCI state type, or a separate downlink and separate uplink TCI state type. For example, the unified TCI state type may be a joint uplink and downlink TCI state type based on the one or more parameters including a first parameter that identifies downlink or joint TCI state configurations for the UE 115-d. The one or more parameters may not include a second parameter that identifies uplink TCI state configurations for the UE 115-d, and the candidate cell may be enabled for both downlink communications and uplink communications.
[0131] In some other examples, the unified TCI state type may be a separate downlink only TCI state type based on the one or more parameters including a first parameter that identifies downlink or joint TCI state configurations for the UE 115-d. In such other examples, the one or more parameters may not include a second parameter that identifies uplink TCI state configurations for the UE 115-d, and the candidate cell may be enabled for downlink communications and not for uplink communications.
[0132] In yet some other examples, the unified TCI state type is a separate downlink and separate uplink TCI state type based on the one or more parameters including a first parameter that identifies downlink or joint TCI state configurations for the UE 115-d. In such other examples, the one or more parameters may include a second parameter that identifies uplink TCI state configurations for the UE 115-d.
[0133] At 515, the UE 115-d may receive a unified TCI state in accordance with the unified TCI state type, the unified TCI state indicative of a beam for the communications with the first TRP 505-a, the second TRP 505-b, or both.
[0134] The UE 115-d may communicate with the first TRP 505-a, the second TRP 505-b, or both in accordance with the unified TCI state type and the beam. For example, at 520, the UE 115-d may communicate with the first TRP 505-a. Similarly, at 525, the UE 115-d may communicate with the second TRP 505-b.
[0135] FIG. 6 shows an example of a process flow 600 that supports unified transmission configuration indicator based low-layer triggered mobility and multi-transmission and reception point power control in accordance with one or more aspects of the present disclosure. The process flow 600 may implement or be implemented by aspects of the wireless communications system 100 and the wireless communications system 200, as described with reference to FIGs. 1 and 2. For instance, in the example of FIG. 6, a UE 115-e may be in communication with a first network entity 105-g and a second network entity 105-h, which may be examples of devices described herein with reference to FIG. 1 or FIG. 2. In the following description of the process flow 600, the operations between the UE 115-e, the first network entity 105-g, and the second network entity 105-h may be performed in a different order than the example shown, or the operations between the UE 115-e, the first network entity 105-g, and the second network entity 105-h may be performed in different orders at different times. Some operations may also be omitted from the process flow 600, and other operations may be added to the process flow 600.
[0136] In some implementations, the first network entity 105-g may be a first TRP and the second network entity 105-h may be a second TRP. The first uplink message may be transmitted to the first TRP in accordance with a first unified TCI state and the second uplink message is transmitted to the second TRP in accordance with a second unified TCI state, where the first transmit power and the second transmit power may be determined on a per-unified TCI state basis.
[0137] At 605, the UE 115-e may receive a configuration for mTRP communications with the first network entity 105-g and the second network entity 105-h.In some examples, the configuration may indicate at least a first closed loop power index value for use in uplink communications with the first network entity 105-g, the second network entity 105-h, or both. The configuration may include the first closed loop power index value and the second closed loop power index value.
[0138] At 610, the UE 115-e may receive a control message that includes one or more TPC commands for the uplink communications. In some examples, the control message may include a first TPC command and a second TPC command.
[0139] In some implementations, a first transmit power is associated with the first TPC command, the first TPC command may be associated with a first unified TCI state, and the first unified TCI state may be associated with the first closed loop power index value. Similarly, the second transmit power may be associated with the second TPC command, the second TPC command may be associated with a second unified TCI state, and the second unified TCI state may be associated with the second closed loop power index value.
[0140] In some other implementations, the first transmit power may be associated with the first TPC command, where the first TPC command may be associated with the first closed loop power index value. Similarly, the second transmit power may be associated with the second TPC command, and the second TPC command may be associated with the second closed loop power index value.
[0141] In yet some other implementations, the configuration may include the first closed loop power index value but may not include the second closed loop power index value. In such implementations, the control message may indicate the first TPC command. The first transmit power and the second transmit power may both be associated with the first TPC command, where the first TPC command may be associated with both a first unified TCI state and a second unified TCI state. The first unified TCI state may be associated with the first closed loop power index value and the second unified TCI state may be associated with the first closed loop power index value.
[0142] At 615, the UE 115-e may transmit a first uplink message to the first network entity 105-g in accordance with a first transmit power, where the first transmit power is based on the first closed loop power index value and the one or more TPC commands. The UE 115-e may transmit the first uplink message to the first network entity 105-g in accordance with a first unified TCI state.
[0143] At 620, the UE 115-e may transmit a second uplink message to the second network entity 105-h in accordance with a second transmit power, where the second transmit power is based on the first closed loop power index value or a second closed loop power index value included in the configuration. Additionally, or alternatively, the second transmit power may also be based on the one or more TPC commands. The UE 115-e may transmit the second uplink message to the second network entity 105-h in accordance with a second unified TCI state. The UE 115-e may determine the first transmit power and the second transmit power on a per-unified TCI state basis.
[0144] FIG. 7 shows an example of a process flow 700 that supports unified transmission configuration indicator based low-layer triggered mobility and multi-transmission and reception point power control in accordance with one or more aspects of the present disclosure. The process flow 700 may implement or be implemented by aspects of the wireless communications system 100 and the wireless communications system 200, as described with reference to FIGs. 1 and 2. For instance, in the example of FIG. 7, a UE 115-f may be in communication with a source network entity 105-i and a target network entity 105-j, which may be examples of devices described herein with reference to FIG. 1 or FIG. 2. In the following description of the process flow 700, the operations between the UE 115-f, the source network entity 105-i, and the target network entity 105-j may be performed in a different order than the example shown, or the operations between the UE 115-f, the source network entity 105-i, and the target network entity 105-j may be performed in different orders at different times. Some operations may also be omitted from the process flow 700, and other operations may be added to the process flow 700.
[0145] At 705, the UE 115-f may receive, while in communication with the source network entity 105-i, a configuration for communications between the UE 115-f and a target network entity 105-j. In some examples, the UE 115-f may receive MAC-CE signaling that is indicative of the source network entity 105-i and the target network entity 105-j and of a relationship between the source network entity 105-i and the target network entity 105-j so as facilitate derivation of a first TA from a second TA based on the relationship. At 710, the UE 115-f may receive a cell switching command. For example, the UE 115-f may receive MAC-CE signaling that includes the cell switching command.
[0146] In some other examples, the UE 115-f may receive a RRC message that is indicative of the source network entity 105-i and the target network entity 105-j and of a relationship between the source network entity 105-i and the target network entity 105-j so as facilitate derivation of the first TA from a second TA based on the relationship. In some implementations, the RRC message may include one or more groups of cells. In such implementations, the relationship between the source network entity 105-i and the target network entity 105-j may indicate that the source network entity 105-i and the target network entity 105-j are in a same group.
[0147] At 715, the UE 115-f may determine the first TA for the communications between the UE 115-f and the target network entity 105-j. For example, the UE 115-f may determine the first TA for communications between the UE 115-f and the target network entity 105-j based on a second TA for communications between the UE 115-f and the source network entity 105-i, a RSTD between the target network entity 105-j and the source network entity 105-i, or both.
[0148] At 720, the UE 115-f may communicate with the target network entity in accordance with the first TA as part of a LTM cell switching operation.
[0149] FIG. 8 shows a block diagram 800 of a device 805 that supports unified transmission configuration indicator based low-layer triggered mobility and multi-transmission and reception point power control in accordance with one or more aspects of the present disclosure. The device 805 may be an example of aspects of a UE 115 as described herein. The device 805 may include a receiver 810, a transmitter 815, and a communications manager 820. The device 805, or one or more components of the device 805 (e.g., the receiver 810, the transmitter 815, and the communications manager 820) , may include one or more processors, memory coupled with the one or more processors, and instructions stored in the memory that are executable by the one or more processors to enable the one or more processors to, individually or collectively, support or enable the described techniques. Each of these components may be in communication with one another (e.g., via one or more buses) .
[0150] The receiver 810 may provide a means for receiving information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to unified TCI based LTM and mTRP power control) . Information may be passed on to other components of the device 805. The receiver 810 may utilize a single antenna or a set of multiple antennas.
[0151] The transmitter 815 may provide a means for transmitting signals generated by other components of the device 805. For example, the transmitter 815 may transmit information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to unified TCI based LTM and mTRP power control) . In some examples, the transmitter 815 may be co-located with a receiver 810 in a transceiver module. The transmitter 815 may utilize a single antenna or a set of multiple antennas.
[0152] The communications manager 820, the receiver 810, the transmitter 815, or various combinations thereof or various components thereof may be examples of means for performing various aspects of unified TCI based LTM and mTRP power control as described herein. For example, the communications manager 820, the receiver 810, the transmitter 815, or various combinations or components thereof may be capable of performing one or more of the functions described herein.
[0153] In some examples, the communications manager 820, the receiver 810, the transmitter 815, or various combinations or components thereof may be implemented in hardware (e.g., in communications management circuitry) . The hardware may include at least one of a processor, a digital signal processor (DSP) , a central processing unit (CPU) , an application-specific integrated circuit (ASIC) , a field-programmable gate array (FPGA) or other programmable logic device, a microcontroller, discrete gate or transistor logic, discrete hardware components, or any combination thereof configured as or otherwise supporting, individually or collectively, a means for performing the functions described in the present disclosure. In some examples, at least one processor and at least one memory coupled with the at least one processor may be configured to perform one or more of the functions described herein (e.g., by one or more processors, individually or collectively, executing instructions stored in the at least one memory) .
[0154] Additionally, or alternatively, the communications manager 820, the receiver 810, the transmitter 815, or various combinations or components thereof may be implemented in code (e.g., as communications management software or firmware) executed by at least one processor. If implemented in code executed by at least one processor, the functions of the communications manager 820, the receiver 810, the transmitter 815, or various combinations or components thereof may be performed by a general-purpose processor, a DSP, a CPU, an ASIC, an FPGA, a microcontroller, or any combination of these or other programmable logic devices (e.g., configured as or otherwise supporting, individually or collectively, a means for performing the functions described in the present disclosure) .
[0155] In some examples, the communications manager 820 may be configured to perform various operations (e.g., receiving, obtaining, monitoring, outputting, transmitting) using or otherwise in cooperation with the receiver 810, the transmitter 815, or both. For example, the communications manager 820 may receive information from the receiver 810, send information to the transmitter 815, or be integrated in combination with the receiver 810, the transmitter 815, or both to obtain information, output information, or perform various other operations as described herein.
[0156] The communications manager 820 may support wireless communications in accordance with examples as disclosed herein. For example, the communications manager 820 is capable of, configured to, or operable to support a means for receiving a configuration that indicates a unified TCI state type for communications with at least one of a first network entity or a second network entity via one or more communication channels. The communications manager 820 is capable of, configured to, or operable to support a means for receiving a unified TCI state in accordance with the unified TCI state type, the unified TCI state indicative of a beam for the communications with the first network entity, the second network entity, or both. The communications manager 820 is capable of, configured to, or operable to support a means for communicating with the first network entity, the second network entity, or both in accordance with the unified TCI state type and the beam.
[0157] Additionally, or alternatively, the communications manager 820 may support wireless communications in accordance with examples as disclosed herein. For example, the communications manager 820 is capable of, configured to, or operable to support a means for receiving a configuration for mTRP communications with a first network entity and a second network entity, where the configuration indicates at least a first closed loop power index value for use in uplink communications with the first network entity, the second network entity, or both. The communications manager 820 is capable of, configured to, or operable to support a means for receiving a control message that includes one or more TPC commands for the uplink communications. The communications manager 820 is capable of, configured to, or operable to support a means for transmitting a first uplink message to the first network entity in accordance with a first transmit power, where the first transmit power is based on the first closed loop power index value and the one or more TPC commands. The communications manager 820 is capable of, configured to, or operable to support a means for transmitting a second uplink message to the second network entity in accordance with a second transmit power, where the second transmit power is based on the first closed loop power index value or a second closed loop power index value included in the configuration, the second transmit power also based on the one or more TPC commands.
[0158] Additionally, or alternatively, the communications manager 820 may support wireless communications in accordance with examples as disclosed herein. For example, the communications manager 820 is capable of, configured to, or operable to support a means for receiving, while in communication with a source network entity, a configuration for communications between the UE and a target network entity. The communications manager 820 is capable of, configured to, or operable to support a means for determining a first TA for the communications between the UE and the target network entity. The communications manager 820 is capable of, configured to, or operable to support a means for communicating with the target network entity in accordance with the first TA as part of a LTM cell switching operation.
[0159] By including or configuring the communications manager 820 in accordance with examples as described herein, the device 805 (e.g., at least one processor controlling or otherwise coupled with the receiver 810, the transmitter 815, the communications manager 820, or a combination thereof) may support techniques for more efficient utilization of communication resources.
[0160] FIG. 9 shows a block diagram 900 of a device 905 that supports unified transmission configuration indicator based low-layer triggered mobility and multi-transmission and reception point power control in accordance with one or more aspects of the present disclosure. The device 905 may be an example of aspects of a device 805 or a UE 115 as described herein. The device 905 may include a receiver 910, a transmitter 915, and a communications manager 920. The device 905, or one of more components of the device 905 (e.g., the receiver 910, the transmitter 915, and the communications manager 920) , may include at least one processor, which may be coupled with at least one memory, to support the described techniques. Each of these components may be in communication with one another (e.g., via one or more buses) .
[0161] The receiver 910 may provide a means for receiving information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to unified TCI based LTM and mTRP power control) . Information may be passed on to other components of the device 905. The receiver 910 may utilize a single antenna or a set of multiple antennas.
[0162] The transmitter 915 may provide a means for transmitting signals generated by other components of the device 905. For example, the transmitter 915 may transmit information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to unified TCI based LTM and mTRP power control) . In some examples, the transmitter 915 may be co-located with a receiver 910 in a transceiver module. The transmitter 915 may utilize a single antenna or a set of multiple antennas.
[0163] The device 905, or various components thereof, may be an example of means for performing various aspects of unified TCI based LTM and mTRP power control as described herein. For example, the communications manager 920 may include a configuration component 925, a TCI state component 930, a messaging component 935, a power control component 940, a mTRP component 945, a TA component 950, a mobility management component 955, or any combination thereof. The communications manager 920 may be an example of aspects of a communications manager 820 as described herein. In some examples, the communications manager 920, or various components thereof, may be configured to perform various operations (e.g., receiving, obtaining, monitoring, outputting, transmitting) using or otherwise in cooperation with the receiver 910, the transmitter 915, or both. For example, the communications manager 920 may receive information from the receiver 910, send information to the transmitter 915, or be integrated in combination with the receiver 910, the transmitter 915, or both to obtain information, output information, or perform various other operations as described herein.
[0164] The communications manager 920 may support wireless communications in accordance with examples as disclosed herein. The configuration component 925 is capable of, configured to, or operable to support a means for receiving a configuration that indicates a unified TCI state type for communications with at least one of a first network entity or a second network entity via one or more communication channels. The TCI state component 930 is capable of, configured to, or operable to support a means for receiving a unified TCI state in accordance with the unified TCI state type, the unified TCI state indicative of a beam for the communications with the first network entity, the second network entity, or both. The messaging component 935 is capable of, configured to, or operable to support a means for communicating with the first network entity, the second network entity, or both in accordance with the unified TCI state type and the beam.
[0165] Additionally, or alternatively, the communications manager 920 may support wireless communications in accordance with examples as disclosed herein. The configuration component 925 is capable of, configured to, or operable to support a means for receiving a configuration for mTRP communications with a first network entity and a second network entity, where the configuration indicates at least a first closed loop power index value for use in uplink communications with the first network entity, the second network entity, or both. The power control component 940 is capable of, configured to, or operable to support a means for receiving a control message that includes one or more TPC commands for the uplink communications. The mTRP component 945 is capable of, configured to, or operable to support a means for transmitting a first uplink message to the first network entity in accordance with a first transmit power, where the first transmit power is based on the first closed loop power index value and the one or more TPC commands. The mTRP component 945 is capable of, configured to, or operable to support a means for transmit a second uplink message to the second network entity in accordance with a second transmit power, where the second transmit power is based on the first closed loop power index value or a second closed loop power index value included in the configuration, the second transmit power also based on the one or more TPC commands.
[0166] Additionally, or alternatively, the communications manager 920 may support wireless communications in accordance with examples as disclosed herein. The configuration component 925 is capable of, configured to, or operable to support a means for receiving, while in communication with a source network entity, a configuration for communications between the UE and a target network entity. The TA component 950 is capable of, configured to, or operable to support a means for determining a first TA for the communications between the UE and the target network entity. The mobility management component 955 is capable of, configured to, or operable to support a means for communicating with the target network entity in accordance with the first TA as part of a LTM cell switching operation.
[0167] In some cases, the configuration component 925, the TCI state component 930, the messaging component 935, the power control component 940, the mTRP component 945, the TA component 950, the mobility management component 955, or any combination thereof, may each be or be at least a part of a processor (e.g., a transceiver processor, or a radio processor, or a transmitter processor, or a receiver processor) . The processor may be coupled with memory and execute instructions stored in the memory that enable the processor to perform or facilitate the features of the configuration component 925, the TCI state component 930, the messaging component 935, the power control component 940, the mTRP component 945, the TA component 950, the mobility management component 955, or any combination thereof as discussed herein. A transceiver processor may be collocated with and / or communicate with (e.g., direct the operations of) a transceiver of the device. A radio processor may be collocated with and / or communicate with (e.g., direct the operations of) a radio (e.g., a NR radio, a LTE radio, a Wi-Fi radio) of the device. A transmitter processor may be collocated with and / or communicate with (e.g., direct the operations of) a transmitter of the device. A receiver processor may be collocated with and / or communicate with (e.g., direct the operations of) a receiver of the device.
[0168] FIG. 10 shows a block diagram 1000 of a communications manager 1020 that supports unified transmission configuration indicator based low-layer triggered mobility and multi-transmission and reception point power control in accordance with one or more aspects of the present disclosure. The communications manager 1020 may be an example of aspects of a communications manager 820, a communications manager 920, or both, as described herein. The communications manager 1020, or various components thereof, may be an example of means for performing various aspects of unified TCI based LTM and mTRP power control as described herein. For example, the communications manager 1020 may include a configuration component 1025, a TCI state component 1030, a messaging component 1035, a power control component 1040, a mTRP component 1045, a TA component 1050, a mobility management component 1055, a control information component 1060, a monitoring component 1065, or any combination thereof. Each of these components, or components or subcomponents thereof (e.g., one or more processors, one or more memories) , may communicate, directly or indirectly, with one another (e.g., via one or more buses) .
[0169] The communications manager 1020 may support wireless communications in accordance with examples as disclosed herein. The configuration component 1025 is capable of, configured to, or operable to support a means for receiving a configuration that indicates a unified TCI state type for communications with at least one of a first network entity or a second network entity via one or more communication channels. The TCI state component 1030 is capable of, configured to, or operable to support a means for receiving a unified TCI state in accordance with the unified TCI state type, the unified TCI state indicative of a beam for the communications with the first network entity, the second network entity, or both. The messaging component 1035 is capable of, configured to, or operable to support a means for communicating with the first network entity, the second network entity, or both in accordance with the unified TCI state type and the beam.
[0170] In some examples, the configuration indicates a first unified TCI state type for the communications with the first network entity, where the first network entity is a candidate cell identified during a LTM procedure by the UE.
[0171] In some examples, to support receiving the configuration, the TCI state component 1030 is capable of, configured to, or operable to support a means for receiving control information that explicitly identifies the first unified TCI state type.
[0172] In some examples, to support receiving the configuration, the TCI state component 1030 is capable of, configured to, or operable to support a means for receiving control information that implicitly identifies the first unified TCI state type through one or more parameters.
[0173] In some examples, the unified TCI state type is a joint uplink and downlink TCI state type based on the one or more parameters including a first parameter that identifies downlink or joint TCI state configurations for the UE, the one or more parameters not including a second parameter that identifies uplink TCI state configurations for the UE, and the candidate cell being enabled for both downlink communications and uplink communications.
[0174] In some examples, the unified TCI state type is a separate downlink only TCI state type based on the one or more parameters including a first parameter that identifies downlink or joint TCI state configurations for the UE, the one or more parameters not including a second parameter that identifies uplink TCI state configurations for the UE, and the candidate cell being enabled for downlink communications and not for uplink communications.
[0175] In some examples, the unified TCI state type is a separate downlink and separate uplink TCI state type based on the one or more parameters including a first parameter that identifies downlink or joint TCI state configurations for the UE and the one or more parameters including a second parameter that identifies uplink TCI state configurations for the UE.
[0176] In some examples, to support receiving the unified TCI state, the mobility management component 1055 is capable of, configured to, or operable to support a means for receiving a cell switch command as part of the LTM procedure, where the cell switch command indicates the unified TCI state for the communications with the first network entity.
[0177] In some examples, to support communicating with the first network entity, the monitoring component 1065 is capable of, configured to, or operable to support a means for monitoring for one or more of a Type 0A PDCCH CSS set, a Type 1 PDCCH CSS set, or a Type 2 PDCCH CSS set based on a root QCL reference signal of the unified TCI state.
[0178] In some examples, to support communicating with the first network entity, the monitoring component 1065 is capable of, configured to, or operable to support a means for monitoring for one or more of a Type 0A PDCCH CSS set, a Type 1 PDCCH CSS set, or a Type 2 PDCCH CSS set based on a monitoring occasion pattern that is common for different unified TCI states.
[0179] In some examples, the unified TCI state type includes at least a joint uplink and downlink TCI state type, a separate downlink only TCI state type, a separate uplink only TCI state type, or a separate downlink and separate uplink TCI state type.
[0180] In some examples, the configuration indicates a first unified TCI state type for the communications with the first network entity and with the second network entity, where the first network entity and the second network entity are in mTRP communication with the UE and where the first network entity is a candidate cell identified by the UE.
[0181] In some examples, to support receiving the configuration, the control information component 1060 is capable of, configured to, or operable to support a means for receiving control information that explicitly identifies the first unified TCI state type.
[0182] In some examples, to support receiving the configuration, the control information component 1060 is capable of, configured to, or operable to support a means for receiving control information that implicitly identifies the first unified TCI state type through one or more parameters.
[0183] In some examples, the unified TCI state type is a joint uplink and downlink TCI state type based on the one or more parameters including a first parameter that identifies downlink or joint TCI state configurations for the UE, the one or more parameters not including a second parameter that identifies uplink TCI state configurations for the UE, and the candidate cell being enabled for both downlink communications and uplink communications.
[0184] In some examples, the unified TCI state type is a separate downlink only TCI state type based on the one or more parameters including a first parameter that identifies downlink or joint TCI state configurations for the UE, the one or more parameters not including a second parameter that identifies uplink TCI state configurations for the UE, and the candidate cell being enabled for downlink communications and not for uplink communications.
[0185] In some examples, the unified TCI state type is a separate downlink and separate uplink TCI state type based on the one or more parameters including a first parameter that identifies downlink or joint TCI state configurations for the UE and the one or more parameters including a second parameter that identifies uplink TCI state configurations for the UE.
[0186] Additionally, or alternatively, the communications manager 1020 may support wireless communications in accordance with examples as disclosed herein. In some examples, the configuration component 1025 is capable of, configured to, or operable to support a means for receiving a configuration for mTRP communications with a first network entity and a second network entity, where the configuration indicates at least a first closed loop power index value for use in uplink communications with the first network entity, the second network entity, or both. The power control component 1040 is capable of, configured to, or operable to support a means for receiving a control message that includes one or more TPC commands for the uplink communications. The mTRP component 1045 is capable of, configured to, or operable to support a means for transmitting a first uplink message to the first network entity in accordance with a first transmit power, where the first transmit power is based on the first closed loop power index value and the one or more TPC commands. In some examples, the mTRP component 1045 is capable of, configured to, or operable to support a means for transmit a second uplink message to the second network entity in accordance with a second transmit power, where the second transmit power is based on the first closed loop power index value or a second closed loop power index value included in the configuration, the second transmit power also based on the one or more TPC commands.
[0187] In some examples, the configuration includes the first closed loop power index value and the second closed loop power index value, and where the control message includes a first TPC command and a second TPC command.
[0188] In some examples, the first transmit power is associated with the first TPC command, the first TPC command is associated with a first TCI state, and the first unified TCI state is associated with the first closed loop power index value, and where the second transmit power is associated with the second TPC command, the second TPC command is associated with a second unified TCI state, and the second unified TCI state is associated with the second closed loop power index value.
[0189] In some examples, the first transmit power is associated with the first TPC command, and the first TPC command is associated with the first closed loop power index value, and where the second transmit power is associated with the second TPC command, and the second TPC command is associated with the second closed loop power index value.
[0190] In some examples, the configuration includes the first closed loop power index value but does not include the second closed loop power index value, and where the control message includes a first TPC command.
[0191] In some examples, the first transmit power and the second transmit power are both associated with the first TPC command, the first TPC command is associated with both a first unified TCI state and a second unified TCI state, and the first unified TCI state is associated with the first closed loop power index value and the second unified TCI state is associated with the first closed loop power index value.
[0192] In some examples, the first network entity is a first TRP and the second network entity is a second TRP, and where the first uplink message is transmitted to the first TRP in accordance with a first unified TCI state and the second uplink message is transmitted to the second TRP in accordance with a second unified TCI state, and where the first transmit power and the second transmit power are determined on a per-unified TCI state basis.
[0193] Additionally, or alternatively, the communications manager 1020 may support wireless communications in accordance with examples as disclosed herein. In some examples, the configuration component 1025 is capable of, configured to, or operable to support a means for receiving, while in communication with a source network entity, a configuration for communications between the UE and a target network entity. The TA component 1050 is capable of, configured to, or operable to support a means for determining a first TA for the communications between the UE and the target network entity. The mobility management component 1055 is capable of, configured to, or operable to support a means for communicating with the target network entity in accordance with the first TA as part of a LTM cell switching operation.
[0194] In some examples, the TA component 1050 is capable of, configured to, or operable to support a means for determining the first TA for communications between the UE and the target network entity based on a second TA for communications between the UE and the source network entity, a RSTD between the target network entity and the source network entity, or both.
[0195] In some examples, to support receiving the configuration, the control information component 1060 is capable of, configured to, or operable to support a means for receiving MAC-CE signaling that is indicative of the source network entity and the target network entity and of a relationship between the source network entity and the target network entity so as facilitate derivation of the first TA from a second TA based on the relationship, where the MAC-CE signaling includes a cell switching command.
[0196] In some examples, to support receiving the configuration, the control information component 1060 is capable of, configured to, or operable to support a means for receiving an RRC message that is indicative of the source network entity and the target network entity and of a relationship between the source network entity and the target network entity so as facilitate derivation of the first TA from a second TA based on the relationship.
[0197] In some examples, the RRC message includes one or more groups of cells, and where the relationship between the source network entity and the target network entity is that the source network entity and the target network entity are in a same group.
[0198] In some cases, the configuration component 1025, the TCI state component 1030, the messaging component 1035, the power control component 1040, the mTRP component 1045, the TA component 1050, the mobility management component 1055, the control information component 1060, the monitoring component 1065, or any combination thereof, may each be or be at least a part of a processor (e.g., a transceiver processor, or a radio processor, or a transmitter processor, or a receiver processor) . The processor may be coupled with the memory and execute instructions stored in the memory that enable the processor to perform or facilitate the features of the configuration component 1025, the TCI state component 1030, the messaging component 1035, the power control component 1040, the mTRP component 1045, the TA component 1050, the mobility management component 1055, the control information component 1060, the monitoring component 1065, or any combination thereof as discussed herein.
[0199] FIG. 11 shows a diagram of a system 1100 including a device 1105 that supports unified transmission configuration indicator based low-layer triggered mobility and multi-transmission and reception point power control in accordance with one or more aspects of the present disclosure. The device 1105 may be an example of or include the components of a device 805, a device 905, or a UE 115 as described herein. The device 1105 may communicate (e.g., wirelessly) with one or more network entities 105, one or more UEs 115, or any combination thereof. The device 1105 may include components for bi-directional voice and data communications including components for transmitting and receiving communications, such as a communications manager 1120, an input / output (I / O) controller 1110, a transceiver 1115, an antenna 1125, at least one memory 1130, code 1135, and at least one processor 1140. These components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more buses (e.g., a bus 1145) .
[0200] The I / O controller 1110 may manage input and output signals for the device 1105. The I / O controller 1110 may also manage peripherals not integrated into the device 1105. In some cases, the I / O controller 1110 may represent a physical connection or port to an external peripheral. In some cases, the I / O controller 1110 may utilize an operating system such as or another known operating system. Additionally or alternatively, the I / O controller 1110 may represent or interact with a modem, a keyboard, a mouse, a touchscreen, or a similar device. In some cases, the I / O controller 1110 may be implemented as part of one or more processors, such as the at least one processor 1140. In some cases, a user may interact with the device 1105 via the I / O controller 1110 or via hardware components controlled by the I / O controller 1110.
[0201] In some cases, the device 1105 may include a single antenna 1125. However, in some other cases, the device 1105 may have more than one antenna 1125, which may be capable of concurrently transmitting or receiving multiple wireless transmissions. The transceiver 1115 may communicate bi-directionally, via the one or more antennas 1125, wired, or wireless links as described herein. For example, the transceiver 1115 may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver. The transceiver 1115 may also include a modem to modulate the packets, to provide the modulated packets to one or more antennas 1125 for transmission, and to demodulate packets received from the one or more antennas 1125. The transceiver 1115, or the transceiver 1115 and one or more antennas 1125, may be an example of a transmitter 815, a transmitter 915, a receiver 810, a receiver 910, or any combination thereof or component thereof, as described herein.
[0202] The at least one memory 1130 may include random access memory (RAM) and read-only memory (ROM) . The at least one memory 1130 may store computer-readable, computer-executable code 1135 including instructions that, when executed by the at least one processor 1140, cause the device 1105 to perform various functions described herein. The code 1135 may be stored in a non-transitory computer-readable medium such as system memory or another type of memory. In some cases, the code 1135 may not be directly executable by the at least one processor 1140 but may cause a computer (e.g., when compiled and executed) to perform functions described herein. In some cases, the at least one memory 1130 may contain, among other things, a basic I / O system (BIOS) which may control basic hardware or software operation such as the interaction with peripheral components or devices.
[0203] The at least one processor 1140 may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof) . In some cases, the at least one processor 1140 may be configured to operate a memory array using a memory controller. In some other cases, a memory controller may be integrated into the at least one processor 1140. The at least one processor 1140 may be configured to execute computer-readable instructions stored in a memory (e.g., the at least one memory 1130) to cause the device 1105 to perform various functions (e.g., functions or tasks supporting unified transmission configuration indicator based low-layer triggered mobility and multi-transmission and reception point power control) . For example, the device 1105 or a component of the device 1105 may include at least one processor 1140 and at least one memory 1130 coupled with or to the at least one processor 1140, the at least one processor 1140 and at least one memory 1130 configured to perform various functions described herein. In some examples, the at least one processor 1140 may include multiple processors and the at least one memory 1130 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. In some examples, the at least one processor 1140 may be a component of a processing system, which may refer to a system (such as a series) of machines, circuitry (including, for example, one or both of processor circuitry (which may include the at least one processor 1140) and memory circuitry (which may include the at least one memory 1130) ) , or components, that receives or obtains inputs and processes the inputs to produce, generate, or obtain a set of outputs. The processing system may be configured to perform one or more of the functions described herein. For example, the at least one processor 1140 or a processing system including the at least one processor 1140 may be configured to, configurable to, or operable to cause the device 1105 to perform one or more of the functions described herein. Further, as described herein, being “configured to, ” being “configurable to, ” and being “operable to” may be used interchangeably and may be associated with a capability, when executing code stored in the at least one memory 1130 or otherwise, to perform one or more of the functions described herein.
[0204] The communications manager 1120 may support wireless communications in accordance with examples as disclosed herein. For example, the communications manager 1120 is capable of, configured to, or operable to support a means for receiving a configuration that indicates a unified TCI state type for communications with at least one of a first network entity or a second network entity via one or more communication channels. The communications manager 1120 is capable of, configured to, or operable to support a means for receiving a unified TCI state in accordance with the unified TCI state type, the unified TCI state indicative of a beam for the communications with the first network entity, the second network entity, or both. The communications manager 1120 is capable of, configured to, or operable to support a means for communicating with the first network entity, the second network entity, or both in accordance with the unified TCI state type and the beam.
[0205] Additionally, or alternatively, the communications manager 1120 may support wireless communications in accordance with examples as disclosed herein. For example, the communications manager 1120 is capable of, configured to, or operable to support a means for receiving a configuration for mTRP communications with a first network entity and a second network entity, where the configuration indicates at least a first closed loop power index value for use in uplink communications with the first network entity, the second network entity, or both. The communications manager 1120 is capable of, configured to, or operable to support a means for receiving a control message that includes one or more TPC commands for the uplink communications. The communications manager 1120 is capable of, configured to, or operable to support a means for transmitting a first uplink message to the first network entity in accordance with a first transmit power, where the first transmit power is based on the first closed loop power index value and the one or more TPC commands. The communications manager 1120 is capable of, configured to, or operable to support a means for transmitting a second uplink message to the second network entity in accordance with a second transmit power, where the second transmit power is based on the first closed loop power index value or a second closed loop power index value included in the configuration, the second transmit power also based on the one or more TPC commands.
[0206] Additionally, or alternatively, the communications manager 1120 may support wireless communications in accordance with examples as disclosed herein. For example, the communications manager 1120 is capable of, configured to, or operable to support a means for receiving, while in communication with a source network entity, a configuration for communications between the UE and a target network entity. The communications manager 1120 is capable of, configured to, or operable to support a means for determining a first TA for the communications between the UE and the target network entity. The communications manager 1120 is capable of, configured to, or operable to support a means for communicating with the target network entity in accordance with the first TA as part of a LTM cell switching operation.
[0207] By including or configuring the communications manager 1120 in accordance with examples as described herein, the device 1105 may support techniques for reduced latency and improved user experience related to more efficient utilization of communication resources.
[0208] In some examples, the communications manager 1120 may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise in cooperation with the transceiver 1115, the one or more antennas 1125, or any combination thereof. Although the communications manager 1120 is illustrated as a separate component, in some examples, one or more functions described with reference to the communications manager 1120 may be supported by or performed by the at least one processor 1140, the at least one memory 1130, the code 1135, or any combination thereof. For example, the code 1135 may include instructions executable by the at least one processor 1140 to cause the device 1105 to perform various aspects of unified transmission configuration indicator based low-layer triggered mobility and multi-transmission and reception point power control as described herein, or the at least one processor 1140 and the at least one memory 1130 may be otherwise configured to, individually or collectively, perform or support such operations.
[0209] FIG. 12 shows a flowchart illustrating a method 1200 that supports unified transmission configuration indicator based low-layer triggered mobility and multi-transmission and reception point power control in accordance with aspects of the present disclosure. The operations of the method 1200 may be implemented by a UE or its components as described herein. For example, the operations of the method 1200 may be performed by a UE 115 as described with reference to FIGs. 1 through 11. In some examples, a UE may execute a set of instructions to control the functional elements of the UE to perform the described functions. Additionally, or alternatively, the UE may perform aspects of the described functions using special-purpose hardware.
[0210] At 1205, the method may include receiving a configuration that indicates a unified TCI state type for communications with at least one of a first network entity or a second network entity via one or more communication channels. The operations of block 1205 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1205 may be performed by a configuration component 1025 as described with reference to FIG. 10.
[0211] At 1210, the method may include receiving a unified TCI state in accordance with the unified TCI state type, the unified TCI state indicative of a beam for the communications with the first network entity, the second network entity, or both. The operations of block 1210 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1210 may be performed by a TCI state component 1030 as described with reference to FIG. 10.
[0212] At 1215, the method may include communicating with the first network entity, the second network entity, or both in accordance with the unified TCI state type and the beam. The operations of block 1215 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1215 may be performed by a messaging component 1035 as described with reference to FIG. 10.
[0213] FIG. 13 shows a flowchart illustrating a method 1300 that supports unified transmission configuration indicator based low-layer triggered mobility and multi-transmission and reception point power control in accordance with aspects of the present disclosure. The operations of the method 1300 may be implemented by a UE or its components as described herein. For example, the operations of the method 1300 may be performed by a UE 115 as described with reference to FIGs. 1 through 11. In some examples, a UE may execute a set of instructions to control the functional elements of the UE to perform the described functions. Additionally, or alternatively, the UE may perform aspects of the described functions using special-purpose hardware.
[0214] At 1305, the method may include receiving a configuration that indicates a unified TCI state type for communications with at least one of a first network entity or a second network entity via one or more communication channels. The operations of block 1305 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1305 may be performed by a configuration component 1025 as described with reference to FIG. 10.
[0215] At 1310, the method may include receiving a cell switch command as part of the LTM procedure, where the cell switch command indicates the unified TCI state for the communications with the first network entity. The operations of block 1310 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1310 may be performed by a mobility management component 1055 as described with reference to FIG. 10.
[0216] At 1315, the method may include receiving a unified TCI state in accordance with the unified TCI state type, the unified TCI state indicative of a beam for the communications with the first network entity, the second network entity, or both. The operations of block 1315 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1315 may be performed by a TCI state component 1030 as described with reference to FIG. 10.
[0217] At 1320, the method may include communicating with the first network entity, the second network entity, or both in accordance with the unified TCI state type and the beam. The operations of block 1320 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1320 may be performed by a messaging component 1035 as described with reference to FIG. 10.
[0218] FIG. 14 shows a flowchart illustrating a method 1400 that supports unified transmission configuration indicator based low-layer triggered mobility and multi-transmission and reception point power control in accordance with aspects of the present disclosure. The operations of the method 1400 may be implemented by a UE or its components as described herein. For example, the operations of the method 1400 may be performed by a UE 115 as described with reference to FIGs. 1 through 11. In some examples, a UE may execute a set of instructions to control the functional elements of the UE to perform the described functions. Additionally, or alternatively, the UE may perform aspects of the described functions using special-purpose hardware.
[0219] At 1405, the method may include receiving a configuration for mTRP communications with a first network entity and a second network entity, where the configuration indicates at least a first closed loop power index value for use in uplink communications with the first network entity, the second network entity, or both. The operations of block 1405 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1405 may be performed by a configuration component 1025 as described with reference to FIG. 10.
[0220] At 1410, the method may include receiving a control message that includes one or more TPC commands for the uplink communications. The operations of block 1410 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1410 may be performed by a power control component 1040 as described with reference to FIG. 10.
[0221] At 1415, the method may include transmitting a first uplink message to the first network entity in accordance with a first transmit power, where the first transmit power is based on the first closed loop power index value and the one or more TPC commands. The operations of block 1415 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1415 may be performed by a mTRP component 1045 as described with reference to FIG. 10.
[0222] At 1420, the method may include transmit a second uplink message to the second network entity in accordance with a second transmit power, where the second transmit power is based on the first closed loop power index value or a second closed loop power index value included in the configuration, the second transmit power also based on the one or more TPC commands. The operations of block 1420 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1420 may be performed by a mTRP component 1045 as described with reference to FIG. 10.
[0223] FIG. 15 shows a flowchart illustrating a method 1500 that supports unified transmission configuration indicator based low-layer triggered mobility and multi-transmission and reception point power control in accordance with aspects of the present disclosure. The operations of the method 1500 may be implemented by a UE or its components as described herein. For example, the operations of the method 1500 may be performed by a UE 115 as described with reference to FIGs. 1 through 11. In some examples, a UE may execute a set of instructions to control the functional elements of the UE to perform the described functions. Additionally, or alternatively, the UE may perform aspects of the described functions using special-purpose hardware.
[0224] At 1505, the method may include receiving, while in communication with a source network entity, a configuration for communications between the UE and a target network entity. The operations of block 1505 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1505 may be performed by a configuration component 1025 as described with reference to FIG. 10.
[0225] At 1510, the method may include determining a first TA for the communications between the UE and the target network entity. The operations of block 1510 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1510 may be performed by a TA component 1050 as described with reference to FIG. 10.
[0226] At 1515, the method may include communicating with the target network entity in accordance with the first TA as part of a LTM cell switching operation. The operations of block 1515 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1515 may be performed by a mobility management component 1055 as described with reference to FIG. 10.
[0227] FIG. 16 shows a flowchart illustrating a method 1600 that supports unified transmission configuration indicator based low-layer triggered mobility and multi-transmission and reception point power control in accordance with aspects of the present disclosure. The operations of the method 1600 may be implemented by a UE or its components as described herein. For example, the operations of the method 1600 may be performed by a UE 115 as described with reference to FIGs. 1 through 11. In some examples, a UE may execute a set of instructions to control the functional elements of the UE to perform the described functions. Additionally, or alternatively, the UE may perform aspects of the described functions using special-purpose hardware.
[0228] At 1605, the method may include receiving, while in communication with a source network entity, a configuration for communications between the UE and a target network entity. The operations of block 1605 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1605 may be performed by a configuration component 1025 as described with reference to FIG. 10.
[0229] At 1610, the method may include determining a first TA for the communications between the UE and the target network entity. The operations of block 1610 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1610 may be performed by a TA component 1050 as described with reference to FIG. 10.
[0230] At 1615, the method may include determining the first TA for communications between the UE and the target network entity based on a second TA for communications between the UE and the source network entity, a RSTD between the target network entity and the source network entity, or both. The operations of block 1615 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1615 may be performed by a TA component 1050 as described with reference to FIG. 10.
[0231] At 1620, the method may include communicating with the target network entity in accordance with the first TA as part of a LTM cell switching operation. The operations of block 1620 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1620 may be performed by a mobility management component 1055 as described with reference to FIG. 10.
[0232] The following provides an overview of aspects of the present disclosure:
[0233] Aspect 1: A method for wireless communications at a UE, comprising: receiving a configuration that indicates a unified TCI state type for communications with at least one of a first network entity or a second network entity via one or more communication channels; receiving a unified TCI state in accordance with the unified TCI state type, the unified TCI state indicative of a beam for the communications with the first network entity, the second network entity, or both; and communicating with the first network entity, the second network entity, or both in accordance with the unified TCI state type and the beam.
[0234] Aspect 2: The method of aspect 1, wherein the configuration indicates a first unified TCI state type for the communications with the first network entity, wherein the first network entity is a candidate cell identified during a LTM procedure by the UE.
[0235] Aspect 3: The method of aspect 2, wherein receiving the configuration comprises: receiving control information that explicitly identifies the first unified TCI state type.
[0236] Aspect 4: The method of aspect 2, wherein receiving the configuration comprises: receiving control information that implicitly identifies the first unified TCI state type through one or more parameters.
[0237] Aspect 5: The method of aspect 4, wherein the unified TCI state type is a joint uplink and downlink TCI state type based on the one or more parameters including a first parameter that identifies downlink or joint TCI state configurations for the UE, the one or more parameters not including a second parameter that identifies uplink TCI state configurations for the UE, and the candidate cell being enabled for both downlink communications and uplink communications.
[0238] Aspect 6: The method of any of aspects 4 through 5, wherein the unified TCI state type is a separate downlink only TCI state type based on the one or more parameters including a first parameter that identifies downlink or joint TCI state configurations for the UE, the one or more parameters not including a second parameter that identifies uplink TCI state configurations for the UE, and the candidate cell being enabled for downlink communications and not for uplink communications.
[0239] Aspect 7: The method of any of aspects 4 through 6, wherein the unified TCI state type is a separate downlink and separate uplink TCI state type based on the one or more parameters including a first parameter that identifies downlink or joint TCI state configurations for the UE and the one or more parameters including a second parameter that identifies uplink TCI state configurations for the UE.
[0240] Aspect 8: The method of any of aspects 2 through 7, wherein receiving the unified TCI state comprises: receiving a cell switch command as part of the LTM procedure, wherein the cell switch command indicates the unified TCI state for the communications with the first network entity.
[0241] Aspect 9: The method of aspect 8, wherein communicating with the first network entity comprises: monitoring for one or more of a Type 0A PDCCH CSS set, a Type 1 PDCCH CSS set, or a Type 2 PDCCH CSS set based on a root QCL reference signal of the unified TCI state.
[0242] Aspect 10: The method of any of aspects 2 through 9, wherein communicating with the first network entity comprises: monitoring for one or more of a Type 0A PDCCH CSS set, a Type 1 PDCCH CSS set, or a Type 2 PDCCH CSS set based on a monitoring occasion pattern that is common for different unified TCI states.
[0243] Aspect 11: The method of any of aspects 1 through 10, wherein the unified TCI state type comprises at least a joint uplink and downlink TCI state type, a separate downlink only TCI state type, a separate uplink only TCI state type, or a separate downlink and separate uplink TCI state type.
[0244] Aspect 12: The method of any of aspects 1 through 11, wherein the configuration indicates a first unified TCI state type for the communications with the first network entity and with the second network entity, wherein the first network entity and the second network entity are in mTRP communication with the UE and wherein the first network entity is a candidate cell identified by the UE.
[0245] Aspect 13: The method of aspect 12, wherein receiving the configuration comprises: receiving control information that explicitly identifies the first unified TCI state type.
[0246] Aspect 14: The method of aspect 12, wherein receiving the configuration comprises: receiving control information that implicitly identifies the first unified TCI state type through one or more parameters.
[0247] Aspect 15: The method of aspect 14, wherein the unified TCI state type is a joint uplink and downlink TCI state type based on the one or more parameters including a first parameter that identifies downlink or joint TCI state configurations for the UE, the one or more parameters not including a second parameter that identifies uplink TCI state configurations for the UE, and the candidate cell being enabled for both downlink communications and uplink communications.
[0248] Aspect 16: The method of any of aspects 14 through 15, wherein the unified TCI state type is a separate downlink only TCI state type based on the one or more parameters including a first parameter that identifies downlink or joint TCI state configurations for the UE, the one or more parameters not including a second parameter that identifies uplink TCI state configurations for the UE, and the candidate cell being enabled for downlink communications and not for uplink communications.
[0249] Aspect 17: The method of any of aspects 14 through 16, wherein the unified TCI state type is a separate downlink and separate uplink TCI state type based on the one or more parameters including a first parameter that identifies downlink or joint TCI state configurations for the UE and the one or more parameters including a second parameter that identifies uplink TCI state configurations for the UE.
[0250] Aspect 18: A method for wireless communications at a UE, comprising: receiving a configuration for mTRP communications with a first network entity and a second network entity, wherein the configuration indicates at least a first closed loop power index value for use in uplink communications with the first network entity, the second network entity, or both; receiving a control message that includes one or more TPC commands for the uplink communications; transmitting a first uplink message to the first network entity in accordance with a first transmit power, wherein the first transmit power is based on the first closed loop power index value and the one or more TPC commands; and transmit a second uplink message to the second network entity in accordance with a second transmit power, wherein the second transmit power is based on the first closed loop power index value or a second closed loop power index value included in the configuration, the second transmit power also based on the one or more TPC commands.
[0251] Aspect 19: The method of aspect 18, wherein the configuration includes the first closed loop power index value and the second closed loop power index value, and wherein the control message includes a first TPC command and a second TPC command.
[0252] Aspect 20: The method of aspect 19, wherein the first transmit power is associated with the first TPC command, the first TPC command is associated with a first unified TCI state, and the first unified TCI state is associated with the first closed loop power index value, and wherein the second transmit power is associated with the second TPC command, the second TPC command is associated with a second unified TCI state, and the second unified TCI state is associated with the second closed loop power index value.
[0253] Aspect 21: The method of aspect 19, wherein the first transmit power is associated with the first TPC command, and the first TPC command is associated with the first closed loop power index value, and wherein the second transmit power is associated with the second TPC command, and the second TPC command is associated with the second closed loop power index value.
[0254] Aspect 22: The method of aspect 18, wherein the configuration includes the first closed loop power index value but does not include the second closed loop power index value, and wherein the control message includes a first TPC command.
[0255] Aspect 23: The method of aspect 22, wherein the first transmit power and the second transmit power are both associated with the first TPC command, the first TPC command is associated with both a first unified TCI state and a second unified TCI state, and the first unified TCI state is associated with the first closed loop power index value and the second unified TCI state is associated with the first closed loop power index value.
[0256] Aspect 24: The method of any of aspects 18 through 23, wherein the first network entity is a first TRP and the second network entity is a second TRP, and wherein the first uplink message is transmitted to the first TRP in accordance with a first unified TCI state and the second uplink message is transmitted to the second TRP in accordance with a second unified TCI state, and wherein the first transmit power and the second transmit power are determined on a per-unified TCI state basis.
[0257] Aspect 25: A method for wireless communications at a UE, comprising: receiving, while in communication with a source network entity, a configuration for communications between the UE and a target network entity; determining a first TA for the communications between the UE and the target network entity; and communicating with the target network entity in accordance with the first TA as part of a LTM cell switching operation.
[0258] Aspect 26: The method of aspect 25, further comprising: determining the first TA for communications between the UE and the target network entity based on a second TA for communications between the UE and the source network entity, a RSTD between the target network entity and the source network entity, or both.
[0259] Aspect 27: The method of any of aspects 25 through 26, wherein receiving the configuration further comprises: receiving MAC-CE signaling that is indicative of the source network entity and the target network entity and of a relationship between the source network entity and the target network entity so as facilitate derivation of the first TA from a second TA based on the relationship, wherein the MAC-CE signaling includes a cell switching command.
[0260] Aspect 28: The method of any of aspects 25 through 27, wherein receiving the configuration further comprises: receiving a RRC message that is indicative of the source network entity and the target network entity and of a relationship between the source network entity and the target network entity so as facilitate derivation of the first TA from a second TA based on the relationship.
[0261] Aspect 29: The method of aspect 28, wherein the RRC message includes one or more groups of cells, and wherein the relationship between the source network entity and the target network entity is that the source network entity and the target network entity are in a same group.
[0262] Aspect 30: A UE for wireless communications, comprising one or more memories storing processor-executable code, and one or more processors coupled with the one or more memories and individually or collectively operable to execute the code to cause the UE to perform a method of any of aspects 1 through 17.
[0263] Aspect 31: A UE for wireless communications, comprising at least one means for performing a method of any of aspects 1 through 17.
[0264] Aspect 32: A non-transitory computer-readable medium storing code for wireless communications, the code comprising instructions executable by one or more processors to perform a method of any of aspects 1 through 17.
[0265] Aspect 33: A UE for wireless communications, comprising one or more memories storing processor-executable code, and one or more processors coupled with the one or more memories and individually or collectively operable to execute the code to cause the UE to perform a method of any of aspects 18 through 24.
[0266] Aspect 34: A UE for wireless communications, comprising at least one means for performing a method of any of aspects 18 through 24.
[0267] Aspect 35: A non-transitory computer-readable medium storing code for wireless communications, the code comprising instructions executable by one or more processors to perform a method of any of aspects 18 through 24.
[0268] Aspect 36: A UE for wireless communications, comprising one or more memories storing processor-executable code, and one or more processors coupled with the one or more memories and individually or collectively operable to execute the code to cause the UE to perform a method of any of aspects 25 through 29.
[0269] Aspect 37: A UE for wireless communications, comprising at least one means for performing a method of any of aspects 25 through 29.
[0270] Aspect 38: A non-transitory computer-readable medium storing code for wireless communications, the code comprising instructions executable by one or more processors to perform a method of any of aspects 25 through 29.
[0271] It should be noted that the methods described herein describe possible implementations, and that the operations and the steps may be rearranged or otherwise modified and that other implementations are possible. Further, aspects from two or more of the methods may be combined.
[0272] Although aspects of an LTE, LTE-A, LTE-A Pro, or NR system may be described for purposes of example, and LTE, LTE-A, LTE-A Pro, or NR terminology may be used in much of the description, the techniques described herein are applicable beyond LTE, LTE-A, LTE-A Pro, or NR networks. For example, the described techniques may be applicable to various other wireless communications systems such as Ultra Mobile Broadband (UMB) , Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi) , IEEE 802.16 (WiMAX) , IEEE 802.20, Flash-OFDM, as well as other systems and radio technologies not explicitly mentioned herein.
[0273] Information and signals described herein may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.
[0274] The various illustrative blocks and components described in connection with the disclosure herein may be implemented or performed using a general-purpose processor, a DSP, an ASIC, a CPU, an FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general-purpose processor may be a microprocessor but, in the alternative, the processor may be any processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration) . Any functions or operations described herein as being capable of being performed by a processor may be performed by multiple processors that, individually or collectively, are capable of performing the described functions or operations.
[0275] The functions described herein may be implemented using hardware, software executed by a processor, firmware, or any combination thereof. If implemented using software executed by a processor, the functions may be stored as or transmitted using one or more instructions or code of a computer-readable medium. Other examples and implementations are within the scope of the disclosure and appended claims. For example, due to the nature of software, functions described herein may be implemented using software executed by a processor, hardware, firmware, hardwiring, or combinations of any of these. Features implementing functions may also be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations.
[0276] 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 location to another. A non-transitory storage medium may be any available medium that may be accessed by a general-purpose or special-purpose computer. By way of example, and not limitation, non-transitory computer-readable media may include RAM, ROM, electrically erasable programmable ROM (EEPROM) , flash memory, compact disk (CD) ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that may be used to carry or store desired program code means in the form of instructions or data structures and that may be accessed by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor. Also, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL) , or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of computer-readable medium. Disk and disc, as used herein, include CD, laser disc, optical disc, digital versatile disc (DVD) , floppy disk and Blu-ray disc. Disks may reproduce data magnetically, and discs may reproduce data optically using lasers. Combinations of the above are also included within the scope of computer-readable media. Any functions or operations described herein as being capable of being performed by a memory may be performed by multiple memories that, individually or collectively, are capable of performing the described functions or operations.
[0277] 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” ) 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. ”
[0278] As used herein, including in the claims, the article “a” before a noun is open-ended and understood to refer to “at least one” of those nouns or “one or more” of those nouns. Thus, the terms “a, ” “at least one, ” “one or more, ” “at least one of one or more” may be interchangeable. For example, if a claim recites “a component” that performs one or more functions, each of the individual functions may be performed by a single component or by any combination of multiple components. Thus, the term “a component” having characteristics or performing functions may refer to “at least one of one or more components” having a particular characteristic or performing a particular function. Subsequent reference to a component introduced with the article “a” using the terms “the” or “said” may refer to any or all of the one or more components. For example, a component introduced with the article “a” may be understood to mean “one or more components, ” and referring to “the component” subsequently in the claims may be understood to be equivalent to referring to “at least one of the one or more components. ” Similarly, subsequent reference to a component introduced as “one or more components” using the terms “the” or “said” may refer to any or all of the one or more components. For example, referring to “the one or more components” subsequently in the claims may be understood to be equivalent to referring to “at least one of the one or more components. ”
[0279] The term “determine” or “determining” encompasses a variety of actions and, therefore, “determining” can include calculating, computing, processing, deriving, investigating, looking up (such as via looking up in a table, a database or another data structure) , ascertaining and the like. Also, “determining” can include receiving (e.g., receiving information) , accessing (e.g., accessing data stored in memory) and the like. Also, “determining” can include resolving, obtaining, selecting, choosing, establishing, and other such similar actions.
[0280] In the appended figures, similar components or features may have the same reference label. Further, various components of the same type may be distinguished by following the reference label by a dash and a second label that distinguishes among the similar components. If just the first reference label is used in the specification, the description is applicable to any one of the similar components having the same first reference label irrespective of the second reference label, or other subsequent reference label.
[0281] The description set forth herein, in connection with the appended drawings, describes example configurations and does not represent all the examples that may be implemented or that are within the scope of the claims. The term “example” used herein means “serving as an example, instance, or illustration, ” and not “preferred” or “advantageous over other examples. ” The detailed description includes specific details for the purpose of providing an understanding of the described techniques. These techniques, however, may be practiced without these specific details. In some instances, known structures and devices are shown in block diagram form in order to avoid obscuring the concepts of the described examples.
[0282] 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
1.A user equipment (UE) , comprising:one or more memories storing processor-executable code; andone or more processors coupled with the one or more memories and individually or collectively operable to execute the code to cause the UE to:receive a configuration that indicates a unified transmission configuration indicator (TCI) state type for communications with at least one of a first network entity or a second network entity via one or more communication channels;receive a unified TCI state in accordance with the unified TCI state type, the unified TCI state indicative of a beam for the communications with the first network entity, the second network entity, or both; andcommunicate with the first network entity, the second network entity, or both in accordance with the unified TCI state type and the beam.2.The UE of claim 1, wherein the configuration indicates a first unified TCI state type for the communications with the first network entity, wherein the first network entity is a candidate cell identified during a lower-layer-triggered mobility (LTM) procedure by the UE.3.The UE of claim 2, wherein, to receive the configuration, the one or more processors are individually or collectively operable to execute the code to cause the UE to:receive control information that explicitly identifies the first unified TCI state type.4.The UE of claim 2, wherein, to receive the configuration, the one or more processors are individually or collectively operable to execute the code to cause the UE to:receive control information that implicitly identifies the first unified TCI state type through one or more parameters.5.The UE of claim 4, wherein the unified TCI state type is a joint uplink and downlink TCI state type based on the one or more parameters including a first parameter that identifies downlink or joint TCI state configurations for the UE, the one or more parameters not including a second parameter that identifies uplink TCI state configurations for the UE, and the candidate cell being enabled for both downlink communications and uplink communications.6.The UE of claim 4, wherein the unified TCI state type is a separate downlink only TCI state type based on the one or more parameters including a first parameter that identifies downlink or joint TCI state configurations for the UE, the one or more parameters not including a second parameter that identifies uplink TCI state configurations for the UE, and the candidate cell being enabled for downlink communications and not for uplink communications.7.The UE of claim 4, wherein the unified TCI state type is a separate downlink and separate uplink TCI state type based on the one or more parameters including a first parameter that identifies downlink or joint TCI state configurations for the UE and the one or more parameters including a second parameter that identifies uplink TCI state configurations for the UE.8.The UE of claim 2, wherein, to receive the unified TCI state, the one or more processors are individually or collectively operable to execute the code to cause the UE to:receive a cell switch command as part of the LTM procedure, wherein the cell switch command indicates the unified TCI state for the communications with the first network entity.9.The UE of claim 8, wherein, to communicate with the first network entity, the one or more processors are individually or collectively operable to execute the code to cause the UE to:monitor for one or more of a Type 0A physical downlink control channel (PDCCH) common search space (CSS) set, a Type 1 PDCCH CSS set, or a Type 2 PDCCH CSS set based on a root quasi co-located (QCL) reference signal of the unified TCI state.10.The UE of claim 2, wherein, to communicate with the first network entity, the one or more processors are individually or collectively operable to execute the code to cause the UE to:monitor for one or more of a Type 0A physical downlink control channel (PDCCH) common search space (CSS) set, a Type 1 PDCCH CSS set, or a Type 2 PDCCH CSS set based on a monitoring occasion pattern that is common for different unified TCI states.11.The UE of claim 1, wherein the unified TCI state type comprises at least a joint uplink and downlink TCI state type, a separate downlink only TCI state type, a separate uplink only TCI state type, or a separate downlink and separate uplink TCI state type.12.The UE of claim 1, wherein the configuration indicates a first unified TCI state type for the communications with the first network entity and with the second network entity, wherein the first network entity and the second network entity are in multi-transmission and reception point (mTRP) communication with the UE and wherein the first network entity is a candidate cell identified by the UE.13.The UE of claim 12, wherein, to receive the configuration, the one or more processors are individually or collectively operable to execute the code to cause the UE to:receive control information that explicitly identifies the first unified TCI state type.14.The UE of claim 12, wherein, to receive the configuration, the one or more processors are individually or collectively operable to execute the code to cause the UE to:receive control information that implicitly identifies the first unified TCI state type through one or more parameters.15.The UE of claim 14, wherein the unified TCI state type is a joint uplink and downlink TCI state type based on the one or more parameters including a first parameter that identifies downlink or joint TCI state configurations for the UE, the one or more parameters not including a second parameter that identifies uplink TCI state configurations for the UE, and the candidate cell being enabled for both downlink communications and uplink communications.16.The UE of claim 14, wherein the unified TCI state type is a separate downlink only TCI state type based on the one or more parameters including a first parameter that identifies downlink or joint TCI state configurations for the UE, the one or more parameters not including a second parameter that identifies uplink TCI state configurations for the UE, and the candidate cell being enabled for downlink communications and not for uplink communications.17.The UE of claim 14, wherein the unified TCI state type is a separate downlink and separate uplink TCI state type based on the one or more parameters including a first parameter that identifies downlink or joint TCI state configurations for the UE and the one or more parameters including a second parameter that identifies uplink TCI state configurations for the UE.18.A user equipment (UE) , comprising:one or more memories storing processor-executable code; andone or more processors coupled with the one or more memories and individually or collectively operable to execute the code to cause the UE to:receive a configuration for multi-transmission and reception point (mTRP) communications with a first network entity and a second network entity, wherein the configuration indicates at least a first closed loop power index value for use in uplink communications with the first network entity, the second network entity, or both;receive a control message that includes one or more transmit power control (TPC) commands for the uplink communications;transmit a first uplink message to the first network entity in accordance with a first transmit power, wherein the first transmit power is based on the first closed loop power index value and the one or more TPC commands; andtransmit a second uplink message to the second network entity in accordance with a second transmit power, wherein the second transmit power is based on the first closed loop power index value or a second closed loop power index value included in the configuration, the second transmit power also based on the one or more TPC commands.19.The UE of claim 18, wherein the configuration includes the first closed loop power index value and the second closed loop power index value, and wherein the control message includes a first TPC command and a second TPC command.20.The UE of claim 19, wherein the first transmit power is associated with the first TPC command, the first TPC command is associated with a first unified transmission configuration indicator (TCI) state, and the first unified TCI state is associated with the first closed loop power index value, and wherein the second transmit power is associated with the second TPC command, the second TPC command is associated with a second unified TCI state, and the second unified TCI state is associated with the second closed loop power index value.21.The UE of claim 19, wherein the first transmit power is associated with the first TPC command, and the first TPC command is associated with the first closed loop power index value, and wherein the second transmit power is associated with the second TPC command, and the second TPC command is associated with the second closed loop power index value.22.The UE of claim 18, wherein the configuration includes the first closed loop power index value but does not include the second closed loop power index value, and wherein the control message includes a first TPC command.23.The UE of claim 22, wherein the first transmit power and the second transmit power are both associated with the first TPC command, the first TPC command is associated with both a first unified transmission configuration indicator (TCI) state and a second unified TCI state, and the first unified TCI state is associated with the first closed loop power index value and the second unified TCI state is associated with the first closed loop power index value.24.The UE of claim 18, wherein the first network entity is a first transmission and reception point (TRP) and the second network entity is a second TRP, and wherein the first uplink message is transmitted to the first TRP in accordance with a first unified transmission configuration indicator (TCI) state and the second uplink message is transmitted to the second TRP in accordance with a second unified TCI state, and wherein the first transmit power and the second transmit power are determined on a per-unified TCI state basis.25.A user equipment (UE) , comprising:one or more memories storing processor-executable code; andone or more processors coupled with the one or more memories and individually or collectively operable to execute the code to cause the UE to:receive, while in communication with a source network entity, a configuration for communications between the UE and a target network entity;determine a first timing advance (TA) for the communications between the UE and the target network entity; andcommunicate with the target network entity in accordance with the first TA as part of a lower-layer triggered mobility (LTM) cell switching operation.26.The UE of claim 25, wherein the one or more processors are individually or collectively further operable to execute the code to cause the UE to:determine the first TA for communications between the UE and the target network entity based on a second TA for communications between the UE and the source network entity, a reference signal timing difference between the target network entity and the source network entity, or both.27.The UE of claim 25, wherein, to receive the configuration, the one or more processors are individually or collectively further operable to execute the code to cause the UE to:receive medium access control-control element (MAC-CE) signaling that is indicative of the source network entity and the target network entity and of a relationship between the source network entity and the target network entity so as facilitate derivation of the first TA from a second TA based on the relationship, wherein the MAC-CE signaling includes a cell switching command.28.The UE of claim 25, wherein, to receive the configuration, the one or more processors are individually or collectively further operable to execute the code to cause the UE to:receive a radio resource control (RRC) message that is indicative of the source network entity and the target network entity and of a relationship between the source network entity and the target network entity so as facilitate derivation of the first TA from a second TA based on the relationship.29.The UE of claim 28, wherein the RRC message includes one or more groups of cells, and wherein the relationship between the source network entity and the target network entity is that the source network entity and the target network entity are in a same group.30.A method for wireless communications at a user equipment (UE) , comprising:receiving a configuration that indicates a unified transmission configuration indicator (TCI) state type for communications with at least one of a first network entity or a second network entity via one or more communication channels;receiving a unified TCI state in accordance with the unified TCI state type, the unified TCI state indicative of a beam for the communications with the first network entity, the second network entity, or both; andcommunicating with the first network entity, the second network entity, or both in accordance with the unified TCI state type and the beam.
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