Beam determination for multiple transmit / receive points
By configuring CORESET pools with multiple indicated beams and using fallback DCI formats, the solution addresses beam determination challenges in 6G wireless systems with non-ideal backhaul, enhancing PDSCH and PUSCH performance across multiple TRPs.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2025-06-05
- Publication Date
- 2026-03-12
AI Technical Summary
In future wireless communication systems like 6G, the heterogeneous backhaul environment with multiple TRPs introduces challenges for beam determination in both downlink and uplink transmissions due to non-ideal backhaul links between TRP groups, rendering existing beam determination schemes ineffective.
The proposed solution involves configuring each control resource set (CORESET) with multiple CORESET pools, each associated with multiple joint or separate downlink and uplink indicated beams, allowing for beam determination based on these associations using fallback DCI formats, with optional RRC parameters for beam selection.
This approach enhances beam determination for PDSCH and PUSCH in heterogeneous backhaul environments, improving communication efficiency and reliability across multiple TRPs.
Smart Images

Figure CN2025099422_12032026_PF_FP_ABST
Abstract
Description
BEAM DETERMINATION FOR MULTIPLE TRANSMIT / RECEIVE POINTSTECHNICAL FIELD
[0001] The present disclosure relates to wireless communications, and more specifically to a user equipment (UE) , a network entity, a processor for wireless communication, methods, and a computer readable medium for beam determination for multiple transmit / receive points (TRPs) .BACKGROUND
[0002] A wireless communication system may include one or multiple network communication devices, such as base stations, which may be otherwise known as an eNodeB (eNB) , a next-generation NodeB (gNB) , or other suitable terminology. Each network communication devices, such as a base station may support wireless communications for one or multiple user communication devices, which may be otherwise known as user equipment (UE) , or other suitable terminology. The wireless communications system may support wireless communications with one or multiple user communication devices by utilizing resources of the wireless communication system (e.g., time resources (e.g., symbols, slots, subframes, frames, or the like) or frequency resources (e.g., subcarriers, carriers) . Additionally, the wireless communications system may support wireless communications across various radio access technologies including third generation (3G) radio access technology, fourth generation (4G) radio access technology, fifth generation (5G) radio access technology, among other suitable radio access technologies beyond 5G (e.g., sixth generation (6G) ) .
[0003] In future wireless communication systems such as 6G, enhanced performance compared to 5G is anticipated, including higher throughput enabled by the deployment of more transmit / receive points (TRPs) within a cell using distributed multiple input multiple output (MIMO) . In practical scenarios, however, not all TRPs can be connected via ideal backhaul links due to cost and complexity constraints. Consequently, it is expected that cells will include multiple TRP groups, where TRPs within the same group are connected via ideal backhaul, while TRPs across different groups may rely on non-ideal backhaul. This heterogeneous backhaul environment introduces new challenges for beam determination in both downlink (DL) and uplink (UL) transmissions, since the existing beam determination schemes are not applicable anymore.SUMMARY
[0004] Embodiments of the present disclosure are provided to support beam determination for multiple TRPs.
[0005] In a first aspect, there is provided a UE. The UE comprises a processor; and a transceiver coupled to the processor, wherein the processor is configured to: receive, from a network entity, configuration information indicating that each control resource set (CORESET) is configured with one of N CORESET pools, wherein each of the N CORESET pools is associated with more than one joint, downlink (DL) or uplink (UL) indicated beams of M joint, DL or UL indicated beams, where M and N are positive integers and M is greater than N; and determine at least one beam of a physical downlink shared channel (PDSCH) scheduled or activated by a fallback DL downlink control information (DCI) format based on the more than one joint or DL indicated beams associated with a CORESET pool where a CORESET in which a first physical downlink control channel (PDCCH) carrying the fallback DL DCI format is transmitted is associated.
[0006] In a second aspect, there is provided a network entity, comprising: a processor; and a transceiver coupled to the processor, wherein the processor is configured to: transmit, to a user equipment (UE) , configuration information indicating that each control resource set (CORESET) is configured with one of N CORESET pools, wherein each of the N CORESET pools is associated with more than one joint, downlink (DL) or uplink (UL) indicated beams of M joint, DL or UL indicated beams, where M and N are positive integers and M is greater than N; and determine at least one beam of a physical downlink shared channel (PDSCH) scheduled or activated by a fallback DL downlink control information (DCI) format based on the more than one joint or DL indicated beams associated with a CORESET pool where a CORESET in which a first physical downlink control channel (PDCCH) carrying the fallback DL DCI format is transmitted is associated.
[0007] In a third aspect, there is provided a processor for wireless communication. The a processor comprise at least one memory; and a controller coupled with the at least one memory and configured to cause the controller to: receive, from a network entity, configuration information indicating that each control resource set (CORESET) is configured with one of N CORESET pools, wherein each of the N CORESET pools is associated with more than one joint, downlink (DL) or uplink (UL) indicated beams of M joint, DL or UL indicated beams, where M and N are positive integers and M is greater than N; and determine at least one beam of a physical downlink shared channel (PDSCH) scheduled or activated by a fallback DL downlink control information (DCI) format based on the more than one joint or DL indicated beams associated with a CORESET pool where a CORESET in which a first physical downlink control channel (PDCCH) carrying the fallback DL DCI format is transmitted is associated.
[0008] In a fourth aspect, there is provided method performed by a user equipment (UE) , the method comprising: receiving, from a network entity, configuration information indicating that each control resource set (CORESET) is configured with one of N CORESET pools, wherein each of the N CORESET pools is associated with more than one joint, downlink (DL) or uplink (UL) indicated beams of M joint, DL or UL indicated beams, where M and N are positive integers and M is greater than N; and determine at least one beam of a physical downlink shared channel (PDSCH) scheduled or activated by a fallback DL downlink control information (DCI) format based on the more than one joint or DL indicated beams associated with a CORESET pool where a CORESET in which a first physical downlink control channel (PDCCH) carrying the fallback DL DCI format is transmitted is associated.
[0009] In a fifth aspect, there is provided method performed by a network entity, the method comprising: transmitting, to a user equipment (UE) , configuration information indicating that each control resource set (CORESET) is configured with one of N CORESET pools, wherein each of the N CORESET pools is associated with more than one joint, downlink (DL) or uplink (UL) indicated beams of M joint, DL or UL indicated beams, where M and N are positive integers and M is greater than N; and determining at least one beam of a physical downlink shared channel (PDSCH) scheduled or activated by a fallback DL downlink control information (DCI) format based on the more than one joint or DL indicated beams associated with a CORESET pool where a CORESET in which a first physical downlink control channel (PDCCH) carrying the fallback DL DCI format is transmitted is associated.
[0010] In a sixth aspect, there is provided a computer readable medium having instructions stored thereon, the instructions, when executed by a processor of an apparatus, causing the apparatus to perform the method according to the fourth or the fifth aspect of the disclosure.
[0011] In some implementations of the methods, the UE and the network entity, in a case that the UE is configured with a first radio resource control (RRC) parameter to apply indicated beams for the PDSCH scheduled or activated by the fallback DCI format, the at least one beam of the PDSCH is determined based on the first RRC parameter, from all of the more than one joint or DL indicated beams associated with the CORESET pool where the CORESET in which the first PDCCH carrying the fallback DL DCI format is transmitted is associated.
[0012] In some implementations of the methods, the UE and the network entity, in a case that the UE is not configured with a first RRC parameter to apply indicated beams for the PDSCH scheduled or activated by the fallback DCI format, the at least one beam of the PDSCH is determined as one of the following: the first joint or DL indicated beam, from all of the more than one joint or DL indicated beams associated with the CORESET pool where the CORESET in which the first PDCCH carrying the fallback DL DCI format is transmitted is associated; or all of the more than one joint or DL indicated beams associated with the CORESET pool where the CORESET in which the first PDCCH carrying the fallback DL DCI format is transmitted is associated.
[0013] In some implementations of the methods, the UE and the network entity, the UE may further determine at least one beam of a physical uplink shared channel (PUSCH) scheduled or activated by a fallback UL DCI format based on the more than one joint or UL indicated beams associated with a CORESET pool where a CORESET in which a second PDCCH carrying the fallback UL DCI format is transmitted is associated.
[0014] In some implementations of the methods, the UE and the network entity, in a case that the UE is configured with a second RRC parameter to apply indicated beams for the PUSCH scheduled or activated by the fallback UL DCI format, the at least one beam of the PUSCH is determined based on the second RRC parameter, from all of the more than one joint or UL indicated beams associated with the CORESET pool where the CORESET in which the second PDCCH carrying the fallback UL DCI format is transmitted is associated.
[0015] In some implementations of the methods, the UE and the network entity, in a case that the UE is not configured with a second RRC parameter to apply indicated beams for the PUSCH scheduled or activated by the fallback UL DCI format, the at least one beam of the PUSCH is determined as one of the following: the first joint or UL indicated beam, from all of the more than one joint or UL indicated beams associated with the CORESET pool where the CORESET in which the second PDCCH carrying the fallback UL DCI format is transmitted is associated; or all of the more than one joint or UL indicated beams associated with the CORESET pool where the CORESET in which the second PDCCH carrying the fallback UL DCI format is transmitted is associated.
[0016] In some implementations of the methods, the UE and the network entity, the UE may receive, from the network entity, a medium access control (MAC) control element (MAC CE) for beam activation, wherein the MAC CE is associated with one of the N CORESET pools, and wherein each codepoint of the MAC CE indicates up to K (1<K<M) joint beams, or up to K DL beams, or up to K UL beams.
[0017] In some implementations of the methods, the UE and the network entity, wherein all beams included in each codepoint of the MAC CE are associated with a same physical cell identity (PCI) , the PCI being a serving cell PCI or a non-serving cell PCI.
[0018] In some implementations of the methods, the UE and the network entity, the UE may receive, from the network entity, a DCI to update L joint indicated beams, or L DL indicated beams, or L UL indicated beams, L being a positive integer less than K, wherein the updated L joint indicated beams and the unchanged K-L joint indicated beams, or the updated L DL indicated beams and the unchanged K-L DL indicated beams, or the updated L UL indicated beams and the unchanged K-L UL indicated beams associated with a CORESET pool are associated with the same PCI.
[0019] In some implementations of the methods, the UE and the network entity, the UE may receive, from the network entity, further configuration information indicating asymmetric DL and UL transmission, where M joint indicated beams are indicated to the UE; and determine a subset of the M joint indicated beams for DL transmission.
[0020] In some implementations of the methods, the UE and the network entity, the subset of M joint indicated beams for DL transmission is determined based on an order in which the M indicated beams are indicated.
[0021] In some implementations of the methods, the UE and the network entity, the subset of M joint indicated beams for DL transmission is determined based on an RRC parameter or a MAC CE indicating beams for DL transmission.
[0022] In some implementations of the methods, the UE and the network entity, the subset of M joint indicated beam for DL transmission is determined based on a beam selection field of a DCI scheduling a PDSCH transmission.
[0023] In some implementations of the methods, the UE and the network entity, the subset of M joint indicated beams for DL transmission includes one or more joint indicated beams from the M joint indicated beams that are not configured with a pathloss offset.BRIEF DESCRIPTION OF THE DRAWINGS
[0024] FIG. 1 illustrates an example of a wireless communications system in which some embodiments of the present disclosure can be implemented.
[0025] FIG. 2 illustrates an example of a multiple TRP (M-TRP) scenario that combines single downlink control information (S-DCI) -based and multiple DCI (M-DCI) -based approaches, in which some embodiments of the present disclosure may be implemented.
[0026] FIG. 3 illustrates an example of a process flow for beam determination for multiple TRPs in accordance with some example embodiments of the present disclosure.
[0027] FIG. 4 illustrates an example of asymmetric DL / UL multiple TRP scenario in which some embodiments of the present disclosure can be implemented.
[0028] FIG. 5 illustrates an example of a device that is suitable for implementing some embodiments of the present disclosure.
[0029] FIG. 6 illustrates an example of a processor that is suitable for implementing some embodiments of the present disclosure.
[0030] FIG. 7 illustrates a flowchart of a method performed by a user equipment in accordance with aspects of the present disclosure.
[0031] FIG. 8 illustrates a flowchart of a method performed by a network entity in accordance with aspects of the present disclosure.
[0032] Throughout the drawings, the same or similar reference numerals represent the same or similar elements.DETAILED DESCRIPTION
[0033] Principles of the present disclosure will now be described with reference to some embodiments. It is to be understood that these embodiments are described only for the purpose of illustration and help those skilled in the art to understand and implement the present disclosure, without suggesting any limitation as to the scope of the disclosure. The disclosure described herein can be implemented in various manners other than the ones described below. In the following description and claims, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skills in the art to which this disclosure belongs.
[0034] References in the present disclosure to “one embodiment, ” “an example embodiment, ” “an embodiment, ” “some embodiments, ” and the like indicate that the embodiment (s) described may include a particular feature, structure, or characteristic, but it is not necessary that every embodiment includes the particular feature, structure, or characteristic. Moreover, such phrases do not necessarily refer to the same embodiment (s) . Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the art to affect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.
[0035] It shall be understood that although the terms “first” and “second” or the like may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, a first element could also be termed as a second element, and similarly, a second element could also be termed as a first element, without departing from the scope of embodiments. As used herein, the term “and / or” includes any and all combinations of one or more of the listed terms. In some examples, values, procedures, or apparatuses are referred to as “best, ” “lowest, ” “highest, ” “minimum, ” “maximum, ” or the like. It will be appreciated that such descriptions are intended to indicate that a selection among many used functional alternatives can be made, and such selections need not be better, smaller, higher, or otherwise preferable to other selections.
[0036] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of embodiments. As used herein, the singular forms “a, ” “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises, ” “comprising, ” “has, ” “having, ” “includes” and / or “including, ” when used herein, specify the presence of stated features, elements, components and / or the like, but do not preclude the presence or addition of one or more other features, elements, components and / or combinations thereof. For example, the term “includes” and its variants are to be read as open terms that mean “includes, but is not limited to. ” The term “based on” is to be read as “based at least in part on. ” The term “one embodiment” and “an embodiment” are to be read as “at least one embodiment. ” The term “another embodiment” is to be read as “at least one other embodiment. ” The use of an expression such as “A and / or B” can mean either “only A” or “only B” or “both A and B. ” Other definitions, explicit and implicit, may be included below.
[0037] Aspects of the present disclosure are described in the context of a wireless communications system. FIG. 1 illustrates an example of a wireless communications system 100 in which some embodiments of the present disclosure can be implemented. The wireless communications system 100 may include one or more network entities 102 (also referred to as network equipment (NE) ) , one or more UEs 104, a core network 106, and a packet data network 108. The wireless communications system 100 may support various radio access technologies. In some implementations, the wireless communications system 100 may be a 4G network, such as an LTE network or an LTE-Advanced (LTE-A) network. In some other implementations, the wireless communications system 100 may be a 5G network, such as an NR network. In other implementations, the wireless communications system 100 may be a combination of a 4G network and a 5G network, or other suitable radio access technology including Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi) , IEEE 802.16 (WiMAX) , IEEE 802.20. The wireless communications system 100 may support radio access technologies beyond 5G. Additionally, the wireless communications system 100 may support technologies, such as time division multiple access (TDMA) , frequency division multiple access (FDMA) , or code division multiple access (CDMA) , etc.
[0038] The one or more network entities 102 may be dispersed throughout a geographic region to form the wireless communications system 100. One or more of the network entities 102 described herein may be or include or may be referred to as a network node, a base station, a network element, a radio access network (RAN) , a base transceiver station, an access point, a NodeB, an eNodeB (eNB) , a next-generation NodeB (gNB) , or other suitable terminology. A network entity 102 and a UE 104 may communicate via a communication link 110, which may be a wireless or wired connection. For example, a network entity 102 and a UE 104 may perform wireless communication (e.g., receive signaling, transmit signaling) over a Uu interface. In a 3GPP non-terrestrial network (NTN) , a network entity 102 in form of a satellite can directly communicate to UE 104 using NR / LTE Uu interface. The satellite may be a transparent satellite or a regenerative satellite. For NTN with a transparent satellite, a base station on earth may communicate with a UE via the satellite. For NTN with a regenerative satellite, the base station may be on board and directly communicate with the UE.
[0039] A network entity 102 may provide a geographic coverage area 112 for which the network entity 102 may support services (e.g., voice, video, packet data, messaging, broadcast, etc. ) for one or more UEs 104 within the geographic coverage area 112. For example, a network entity 102 and a UE 104 may support wireless communication of signals related to services (e.g., voice, video, packet data, messaging, broadcast, etc. ) according to one or multiple radio access technologies. In some implementations, a network entity 102 may be moveable, for example, a satellite associated with a non-terrestrial network. In some implementations, different geographic coverage areas 112 associated with the same or different radio access technologies may overlap, but the different geographic coverage areas 112 may be associated with different network entities 102. 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.
[0040] The one or more UEs 104 may be dispersed throughout a geographic region of the wireless communications system 100. A UE 104 may include or may be referred to as a mobile device, a wireless device, a remote device, a remote unit, a handheld device, or a subscriber device, or some other suitable terminology. In some implementations, the UE 104 may be referred to as a unit, a station, a terminal, or a client, among other examples. Additionally, or alternatively, the UE 104 may be referred to as an Internet-of-Things (IoT) device, an Internet-of-Everything (IoE) device, or machine-type communication (MTC) device, among other examples. In some implementations, a UE 104 may be stationary in the wireless communications system 100. In some other implementations, a UE 104 may be mobile in the wireless communications system 100. In some other implementations, a UE 104 may be a UAV UE and may communicate with one or more network entities 102 while flying.
[0041] The one or more UEs 104 may be devices in different forms or having different capabilities. Some examples of UEs 104 are illustrated in FIG. 1. A UE 104 may be capable of communicating with various types of devices, such as the network entities 102, other UEs 104, or network equipment (e.g., the core network 106, the packet data network 108, a relay device, an integrated access and backhaul (IAB) node, or another network equipment) , as shown in FIG. 1. Additionally, or alternatively, a UE 104 may support communication with other network entities 102 or UEs 104, which may act as relays in the wireless communications system 100.
[0042] A UE 104 may also be able to support wireless communication directly with other UEs 104 over a communication link 114. For example, a UE 104 may support wireless communication directly with another UE 104 over a device-to-device (D2D) communication link. In some implementations, such as vehicle-to-vehicle (V2V) deployments, vehicle-to-everything (V2X) deployments, or cellular-V2X deployments, the communication link 114 may be referred to as a sidelink. For example, a UE 104 may support wireless communication directly with another UE 104 over a PC5 interface.
[0043] A network entity 102 may support communications with the core network 106, or with another network entity 102, or both. For example, a network entity 102 may interface with the core network 106 through one or more backhaul links 116 (e.g., via an S1, N2, N2, or another network interface) . The network entities 102 may communicate with each other over the backhaul links 116 (e.g., via an X2, Xn, or another network interface) . In some implementations, the network entities 102 may communicate with each other directly (e.g., between the network entities 102) . In some other implementations, the network entities 102 may communicate with each other or indirectly (e.g., via the core network 106) . In some implementations, one or more network entities 102 may include subcomponents, such as an access network entity, which may be an example of an access node controller (ANC) . An ANC may communicate with the one or more UEs 104 through one or more other access network transmission entities, which may be referred to as a radio heads, smart radio heads, or TRPs.
[0044] In some implementations, a network entity 102 may be configured in a disaggregated architecture, which may be configured to utilize a protocol stack physically or logically distributed among two or more network entities 102, 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 102 may include one or more of a central unit (CU) , a distributed unit (DU) , a radio unit (RU) , a RAN Intelligent Controller (RIC) (e.g., a Near-Real Time RIC (Near-RT RIC) , a Non-Real Time RIC (Non-RT RIC) ) , a Service Management and Orchestration (SMO) system, or any combination thereof.
[0045] An RU 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 102 in a disaggregated RAN architecture may be co-located, or one or more components of the network entities 102 may be located in distributed locations (e.g., separate physical locations) . In some implementations, one or more network entities 102 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) ) .
[0046] Split of functionality between a CU, a DU, and an RU may be flexible and may support different functionalities depending upon which functions (e.g., network layer functions, protocol layer functions, baseband functions, radio frequency functions, and any combinations thereof) are performed at a CU, a DU, or an RU. For example, a functional split of a protocol stack may be employed between a CU and a DU such that the CU may support one or more layers of the protocol stack and the DU may support one or more different layers of the protocol stack. In some implementations, the CU may host upper protocol layer (e.g., a layer 3 (L3) , a layer 2 (L2) ) functionality and signaling (e.g., Radio Resource Control (RRC) , service data adaption protocol (SDAP) , Packet Data Convergence Protocol (PDCP) ) . The CU may be connected to one or more DUs or RUs, and the one or more DUs or RUs may host lower protocol layers, such as a layer 1 (L1) (e.g., physical (PHY) layer) or an 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.
[0047] Additionally, or alternatively, a functional split of the protocol stack may be employed between a DU and an RU such that the DU may support one or more layers of the protocol stack and the RU may support one or more different layers of the protocol stack. The DU may support one or multiple different cells (e.g., via one or more RUs) . In some implementations, a functional split between a CU and a DU, or between a DU and an RU may be within a protocol layer (e.g., some functions for a protocol layer may be performed by one of a CU, a DU, or an RU, while other functions of the protocol layer are performed by a different one of the CU, the DU, or the RU) .
[0048] A CU may be functionally split further into CU control plane (CU-CP) and CU user plane (CU-UP) functions. A CU may be connected to one or more DUs via a midhaul communication link (e.g., F1, F1-c, F1-u) , and a DU may be connected to one or more RUs via a fronthaul communication link (e.g., open fronthaul (FH) interface) . In some implementations, a midhaul communication link or a fronthaul communication link may be implemented in accordance with an interface (e.g., a channel) between layers of a protocol stack supported by respective network entities 102 that are in communication via such communication links.
[0049] The core network 106 may support user authentication, access authorization, tracking, connectivity, and other access, routing, or mobility functions. The core network 106 may be an evolved packet core (EPC) , or a 5G core (5GC) , which may include a control plane entity that manages access and mobility (e.g., a mobility management entity (MME) , an access and mobility management functions (AMF) ) and a user plane entity that routes packets or interconnects to external networks (e.g., a serving gateway (S-GW) , a Packet Data Network (PDN) gateway (P-GW) , or a user plane function (UPF) ) . In some implementations, the control plane entity may manage non-access stratum (NAS) functions, such as mobility, authentication, and bearer management (e.g., data bearers, signal bearers, etc. ) for the one or more UEs 104 served by the one or more network entities 102 associated with the core network 106.
[0050] The core network 106 may communicate with the packet data network 108 over one or more backhaul links 116 (e.g., via an S1, N2, N2, or another network interface) . The packet data network 108 may include an application server 118. In some implementations, one or more UEs 104 may communicate with the application server 118. A UE 104 may establish a session (e.g., a protocol data unit (PDU) session, or the like) with the core network 106 via a network entity 102. The core network 106 may route traffic (e.g., control information, data, and the like) between the UE 104 and the application server 118 using the established session (e.g., the established PDU session) . The PDU session may be an example of a logical connection between the UE 104 and the core network 106 (e.g., one or more network functions of the core network 106) .
[0051] In the wireless communications system 100, the network entities 102 and the UEs 104 may use resources of the wireless communications system 100 (e.g., time resources (e.g., symbols, slots, subframes, frames, or the like) or frequency resources (e.g., subcarriers, carriers) ) to perform various operations (e.g., wireless communications) . In some implementations, the network entities 102 and the UEs 104 may support different resource structures. For example, the network entities 102 and the UEs 104 may support different frame structures. In some implementations, such as in 4G, the network entities 102 and the UEs 104 may support a single frame structure. In some other implementations, such as in 5G and among other suitable radio access technologies, the network entities 102 and the UEs 104 may support various frame structures (i.e., multiple frame structures) . The network entities 102 and the UEs 104 may support various frame structures based on one or more numerologies.
[0052] One or more numerologies may be supported in the wireless communications system 100, and a numerology may include a subcarrier spacing and a cyclic prefix. A first numerology (e.g., μ=0) may be associated with a first subcarrier spacing (e.g., 15 kHz) and a normal cyclic prefix. In some implementations, the first numerology (e.g., μ=0) associated with the first subcarrier spacing (e.g., 15 kHz) may utilize one slot per subframe. A second numerology (e.g., μ=1) may be associated with a second subcarrier spacing (e.g., 30 kHz) and a normal cyclic prefix. A third numerology (e.g., μ=2) may be associated with a third subcarrier spacing (e.g., 60 kHz) and a normal cyclic prefix or an extended cyclic prefix. A fourth numerology (e.g., μ=3) may be associated with a fourth subcarrier spacing (e.g., 120 kHz) and a normal cyclic prefix. A fifth numerology (e.g., μ=4) may be associated with a fifth subcarrier spacing (e.g., 240 kHz) and a normal cyclic prefix.
[0053] A time interval of a resource (e.g., a communication resource) may be organized according to frames (also referred to as radio frames) . Each frame may have a duration, for example, a 10 millisecond (ms) duration. In some implementations, each frame may include multiple subframes. For example, each frame may include 10 subframes, and each subframe may have a duration, for example, a 1 ms duration. In some implementations, each frame may have the same duration. In some implementations, each subframe of a frame may have the same duration.
[0054] Additionally or alternatively, a time interval of a resource (e.g., a communication resource) may be organized according to slots. For example, a subframe may include a number (e.g., quantity) of slots. The number of slots in each subframe may also depend on the one or more numerologies supported in the wireless communications system 100. For instance, the first, second, third, fourth, and fifth numerologies (i.e., μ=0, μ=1, μ=2, μ=3, μ=4) associated with respective subcarrier spacings of 15 kHz, 30 kHz, 60 kHz, 120 kHz, and 240 kHz may utilize a single slot per subframe, two slots per subframe, four slots per subframe, eight slots per subframe, and 16 slots per subframe, respectively. Each slot may include a number (e.g., quantity) of symbols (e.g., OFDM symbols) . In some implementations, the number (e.g., quantity) of slots for a subframe may depend on a numerology. For a normal cyclic prefix, a slot may include 14 symbols. For an extended cyclic prefix (e.g., applicable for 60 kHz subcarrier spacing) , a slot may include 12 symbols. The relationship between the number of symbols per slot, the number of slots per subframe, and the number of slots per frame for a normal cyclic prefix and an extended cyclic prefix may depend on a numerology. It should be understood that reference to a first numerology (e.g., μ=0) associated with a first subcarrier spacing (e.g., 15 kHz) may be used interchangeably between subframes and slots.
[0055] In the wireless communications system 100, an electromagnetic (EM) spectrum may be split, based on frequency or wavelength, into various classes, frequency bands, frequency channels, etc. By way of example, the wireless communications system 100 may support one or multiple operating frequency bands, such as frequency range designations FR1 (410 MHz –7.125 GHz) , FR2 (24.25 GHz –52.6 GHz) , FR3 (7.125 GHz –24.25 GHz) , FR4 (52.6 GHz –114.25 GHz) , FR4a or FR4-1 (52.6 GHz –71 GHz) , and FR5 (114.25 GHz –300 GHz) . In some implementations, the network entities 102 and the UEs 104 may perform wireless communications over one or more of the operating frequency bands. In some implementations, FR1 may be used by the network entities 102 and the UEs 104, among other equipment or devices for cellular communications traffic (e.g., control information, data) . In some implementations, FR2 may be used by the network entities 102 and the UEs 104, among other equipment or devices for short-range, high data rate capabilities.
[0056] FR1 may be associated with one or multiple numerologies (e.g., at least three numerologies) . For example, FR1 may be associated with a first numerology (e.g., μ=0) , which includes 15 kHz subcarrier spacing; a second numerology (e.g., μ=1) , which includes 30 kHz subcarrier spacing; and a third numerology (e.g., μ=2) , which includes 60 kHz subcarrier spacing. FR2 may be associated with one or multiple numerologies (e.g., at least 2 numerologies) . For example, FR2 may be associated with a third numerology (e.g., μ=2) , which includes 60 kHz subcarrier spacing; and a fourth numerology (e.g., μ=3) , which includes 120 kHz subcarrier spacing.
[0057] In some scenarios, S-DCI based M-TRP and M-DCI based M-TRP can be combined for intra-and inter-cell. The TRPs can be divided into multiple TRP groups, where TRPs within the same TRP group perform S-DCI-based M-TRP operations, while different TRP groups perform M-DCI-based M-TRP operations.
[0058] FIG. 2 illustrates an example of an M-TRP scenario that combines S-DCI-based and M-DCI-based approaches. As illustrated in FIG. 2, TRP 1 and TRP 2 belong to TRP Group 1, and TRP 3 and TRP 4 belong to TRP Group 2. Accordingly, for those TRPs with ideal backhauls which are (TRP1, TRP2) or (TRP3, TRP4) , the transmission and reception can be based on the principle in S-DCI based M-TRP, while for those TRPs with non-ideal backhauls which are TRPs in two different TRP groups, the transmission and reception can be based on the principle in M-DCI based M-TRP.
[0059] In the case of combination of S-DCI based and M-DCI based M-TRP, each TRP group can be configured with one CORESETPoolIndex value, then each CORESETPoolIndex value will be associated with more than one indicated beam. In this case, the beam determination of PDSCH scheduled by a fallback DL DCI format such as DCI format 1_0 and the beam determination of PUSCH scheduled by a fallback UL DCI format such as DCI format 0_0 can not reuse the existing scheme since the beam of PDSCH / PUSCH should be associated with the beams associated with the CORESETPoolIndex value where the scheduling DCI is associated. Therefore, the beam determination of PDSCH scheduled by DCI format 1_0 and the beam determination of PUSCH scheduled by DCI format 0_0 should be enhanced in the scenario of combination of S-DCI based and M-DCI based M-TRP.
[0060] The following describes beam determination of PDSCH scheduled or activated by fallback DCI format such as DCI format 1_0 and PUSCH scheduled or activated by fallback UL DCI format such as DCI format 0_0 for this scenario.
[0061] FIG. 3 illustrates an example of a process flow 300 for beam determination for multiple TRPs in accordance with some example embodiments of the present disclosure. The process flow 300 may involve a UE 301 and a network entity (e.g. a TRP, or a base station including one or more TRPs) 202. The process flow 300 may be applied to the wireless communications system 100 with reference to FIG. 1, for example, the UE 301 may be any of UEs 104, and the network entity 302 may be any of the network entities 102. It would be appreciated that the process flow 200 may be applied to other communication scenarios.
[0062] At 310, the network entity 302 transmits, to the UE 301, configuration information 315 indicating that each control resource set (CORESET) is configured with one of N CORESET pools, wherein each of the N CORESET pools is associated with more than one joint, DL or UL indicated beams of M joint, DL or UL indicated beams, where M and N are positive integers and M is greater than N. Correspondingly, at 320, the UE 301 receives the configuration information 315 from the network entity 302. Each of the N CORESET pools may be identified by an index value, for example, a CORESETPoolIndex value.
[0063] When there are M TRPs, M joint indicated beams are indicated if DL / UL joint beam mode is configured, or M DL indicated beams and M UL indicated beams are indicated if DL / UL separated beam mode is configured.
[0064] In some embodiments, N (N<M) CORESETPoolIndex values are configured in the scenario of combination of S-DCI based and M-DCI based M-TRP, where each CORESET is configured with one CORESETPoolIndex value. For each CORESETPoolIndex value, a beam activation medium access control (MAC) control element (MAC CE) is activated, and a PDCCH carrying a DCI transmitting from a CORESET associated with the CORESETPoolIndex value may indicate K (K>1) joint indicated beams, or K DL and UL indicated beams for the CORESETPoolIndex value. Therefore, each CORESETPoolIndex value is associated with multiple (K) joint indicated beams, or multiple (K) DL and (K) UL indicated beams.
[0065] For PDSCH scheduled or activated with fallback DL DCI format such as DCI format 1_0 and PUSCH scheduled or activated with fallback UL DCI format such as DCI format 0_0, there may be no beam selection field in the DCI. Therefore, the beam determination of PDSCH scheduled or activated with fallback DL DCI format such as DCI format 1_0 and PUSCH scheduled or activated with fallback DL DCI format such as DCI format 0_0 will be separately discussed. Note that a PDSCH activated by a DL DCI may be a semi-persistent scheduling (SPS) PDSCH, while a PUSCH activated by a UL DCI is a Type 2 configured grant PUSCH.
[0066] At 330, the UE 301 determines at least one beam of a PDSCH scheduled or activated by a fallback DL DCI format based on the more than one joint or DL indicated beams associated with a CORESET pool where a CORESET in which a first PDCCH carrying the fallback DL DCI format is transmitted is associated. Correspondingly, at 340, the network entity 302 determines at least one beam of a PDSCH scheduled or activated by a fallback DL DCI format based on the more than one joint or DL indicated beams associated with a CORESET pool where a CORESET in which a first PDCCH carrying the fallback DL DCI format is transmitted is associated.
[0067] In some embodiments, if the UE is configured with a first radio resource control (RRC) parameter to apply indicated beams for the PDSCH scheduled or activated by the fallback DCI format, the at least one beam of the PDSCH can be determined based on the first RRC parameter, from all of the more than one joint or DL indicated beams associated with the CORESET pool where the CORESET in which the first PDCCH carrying the fallback DL DCI format is transmitted is associated.
[0068] The first RRC parameter may be reused from an existing specification parameter (e.g., applyIndicatedTCI-StateDCI-1-0) or a newly introduced parameter. If the first RRC parameter is configured to the UE, the beam (s) of the PDSCH is the joint or DL indicated beam (s) according to the RRC parameter of all the joint or DL indicated beams associated with a CORESETPoolIndex value associated with a PDCCH carrying the fallback DL DCI format such as DCI format 1_0.
[0069] If the UE is not configured with the first RRC parameter to apply indicated beams for the PDSCH scheduled or activated by the fallback DCI format, the beam of the PDSCH may be determined as the first joint or DL indicated beam, from all of the more than one joint or DL indicated beams associated with the CORESET pool where the CORESET in which the first PDCCH carrying the fallback DL DCI format is transmitted is associated. For example, the beam of the PDSCH is the first joint or DL indicated beam of all the joint or DL indicated beams associated with a CORESETPoolIndex value associated with a PDCCH carrying fallback DL DCI format such as DCI format 1_0.
[0070] Alternatively, if the UE is not configured with the first RRC parameter, the beam (s) of the PDSCH may be all of the more than one joint or DL indicated beams associated with the CORESET pool where the CORESET in which the first PDCCH carrying the fallback DL DCI format is transmitted is associated. For example, the beam (s) of the PDSCH are all the joint or DL indicated beams associated with a CORESETPoolIndex value associated with a PDCCH carrying fallback DL DCI format such as DCI format 1_0.
[0071] For beam determination of a PUSCH scheduled or activated with fallback UL DCI format such as DCI format 0_0, the UE may determine at least one beam of a PUSCH scheduled or activated by a fallback UL DCI format based on the more than one joint or UL indicated beams associated with a CORESET pool where a CORESET in which a second PDCCH carrying the fallback UL DCI format is transmitted is associated.
[0072] In some embodiments, if the UE is configured with a second RRC parameter to apply indicated beams for the PUSCH scheduled or activated by the fallback UL DCI format, the beam (s) of the PUSCH may be determined based on the second RRC parameter, from all of the more than one joint or UL indicated beams associated with the CORESET pool where the CORESET in which the second PDCCH carrying the fallback UL DCI format is transmitted is associated. For example, the beam (s) of the PUSCH may be determined as the joint or UL indicated beam (s) according to the second RRC parameter of all the joint or UL indicated beams associated with a CORESETPoolIndex value associated with a PDCCH carrying the DCI format 0_0. The second RRC parameter may be named as applyIndicatedTCI-StateDCI-0-0.
[0073] If the UE is not configured with a second RRC parameter to apply indicated beams for the PUSCH scheduled or activated by the fallback UL DCI format, the beam of the PUSCH may be determined as the first joint or UL indicated beam, from all of the more than one joint or UL indicated beams associated with the CORESET pool where the CORESET in which the second PDCCH carrying the fallback UL DCI format is transmitted is associated. For example, the beam of the PUSCH may be the first joint or UL indicated beam of all the joint or UL indicated beams associated with a CORESETPoolIndex value associated with a PDCCH carrying the fallback UL DCI format such as DCI format 0_0.
[0074] Alternatively, if the UE is not configured with the second RRC parameter, the beam (s) of the PUSCH may be determined as all of the more than one joint or UL indicated beams associated with the CORESET pool where the CORESET in which the second PDCCH carrying the fallback UL DCI format is transmitted is associated. For example, the beam (s) of the PUSCH may be determined as all the joint or UL indicated beams associated with a CORESETPoolIndex value associated with a PDCCH carrying the fallback UL DCI format such as DCI format 0_0.
[0075] The following describes restrictions on beam activation and updating in the context of inter-cell operation involving a combination of S-DCI based M-TRP and M-DCI based M-TRP schemes.
[0076] The UE may receive from the network entity a MAC CE for beam activation associated with one of the N CORESET pools. Each codepoint of the MAC CE can indicate up to K (1<K<M) joint beams, or up to K DL beams, or up to K UL beams. Since a TRP with a non-serving physical cell identity (PCI) and a TRP with serving PCI can’t perform S-DCI based M-TRP operation, restrictions as follows can be applied to the beam activation and subsequent beam updating.
[0077] One restriction is that the TRPs in a TRP group should be associated with a same PCI. In some embodiments, all beams included in each codepoint of the MAC CE are associated with a same PCI which could be a serving cell PCI or a non-serving cell PCI.
[0078] One TRP group may be associated with one CORESETPoolIndex value, and one beam activation MAC CE may be associated with one CORESETPoolIndex value. For each codepoint of the beam activation MAC CE associated with one CORESETPoolIndex value, the joint beams in joint beam mode are associated with a same PCI (either serving cell PCI or non-serving cell PCI) , or the DL and UL beams in separate beam mode are associated with a same PCI (either serving cell PCI or non-serving cell PCI) .
[0079] Another restriction relates to beam updating associated with a CORESET pool. If the K (1<K<M) indicated beams associated with one CORESETPoolIndex value are associated with a PCI (either serving cell PCIs or non-serving cell PCIs) , and only a subset of the indicated beams whose number is L (L<K) are updated according to a DCI, and then the subset of the indicated beams of a codepoint in a beam activation MAC CE associated with the CORESETPoolIndex value should be associated with the same PCI. In this case, the newly indicated beams (L) and the unchanged indicated beams (K-L) associated with the CORESETPoolIndex value are associated with the same PCI.
[0080] In some embodiments, the UE may receive a DCI from the network entity to update a subset of joint indicated beams, DL indicated beams, or UL indicated beams associated with a CORESET pool (e.g., updating L beams) . Under the specified restriction, the updated L beams (joint / DL / UL) and the unchanged K-L beams (joint / DL / UL) of the CORESET pool should be associated with the same PCI.
[0081] FIG. 4 illustrates an asymmetric DL / UL multi-TRP scenario where embodiments of this disclosure may be implemented. This scenario can be applied independently or in combination with FIG. 2’s scenario (e.g., as one TRP group) .
[0082] Asymmetric DL / UL multiple TRPs is supported in Release-19, where only one TRP for DL transmission and up to two TRPs for UL transmission. In 6G, asymmetric DL / UL multiple TRPs may be extended such as 2 TRPs for DL transmission and 4 TRPs for UL transmission which is shown in FIG. 4. In FIG. 4, TRP 1 and TRP 4 are two TRPs for both DL and UL transmission, and TRP 2 and TRP 3 are two TRPs only for UL transmission. If S-DCI based M-TRP is applied for this scenario, only two indicated beams are applied for DL transmission, and four indicated beams are applied for UL transmission. In joint beam mode, four joint indicated beams are indicated for the four TRPs, then how to determine two joint indicated beams for DL transmission needs to be studied.
[0083] Assume M (M>2) TRPs are deployed, including K (1<K<M) TRPs for both DL and UL transmission and the other M-K TRPs only for UL transmission. If joint beam mode is configured and S-DCI based M-TRP is performed, then one beam activation MAC CE is used for beam activation, where each codepoint of the MAC CE indicates up to M joint beams. A DCI can indicate M joint indicated beams. However, only K indicated beams can be used for DL transmission in this case.
[0084] In some embodiments, the UE may receive, from the network entity, configuration information indicating asymmetric DL and UL transmission, where M joint indicated beams are indicated to the UE, and may determine a subset of the M joint indicated beams for DL transmission. Options for the determining the K indicated beam for DL transmission are provided as follow.
[0085] In one embodiments, the first K joint indicated beams are determined for DL transmission. That is, joint indicated beams for DL transmission are determined based on an order in which the M indicated beams are indicated. For PDSCH transmission, the beam is determined from one or more of the K determined joint indicated beams such as by a beam selection field in the corresponding DCI.
[0086] Alternatively, an RRC parameter or a MAC CE may be used to indicate which K joint indicated beams of the M joint indicated beams are for DL transmission. For example, the RRC parameter or the MAC CE may list each of the K joint indicated beams, or provide a bitmap with M bits. For PDSCH transmission, the beam is determined from one or more of the K determined joint indicated beams such as by a beam selection field in the corresponding DCI.
[0087] Alternatively, the joint indicated beams for DL transmission may be determined based on a beam selection field of a DCI scheduling a PDSCH transmission. The beam selection field may indicate up to K joint indicated beams for PDSCH, where an example is shown in Table 1 with M=4, K=2. Table 1 Interpretation of beam selection field for PDSCH
[0088] Alternatively, the joint indicated beams for DL transmission may be the joint indicated beams from the M joint indicated beams that are not configured with a pathloss offset. The UE may determine that the K joint indicated beams of the M indicated beams which are not configured with pathloss offset are used for DL transmission. For PDSCH transmission, the beam may be determined from one or more of the K determined joint indicated beams such as by a beam selection field in the corresponding DCI.
[0089] FIG. 5 illustrates an example of a device that is suitable for implementing some embodiments of the present disclosure. The device 500 may be an example of a UE 104 or network entity 102 as described herein. The device 500 may support wireless communication with one or more network entities 102, UEs 104, or any combination thereof. The device 500 may include components for bi-directional communications including components for transmitting and receiving communications, such as a processor 502, a memory 504, a transceiver 506, and, optionally, an I / O controller 508. These components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more interfaces (e.g., buses) .
[0090] The processor 502, the memory 504, the transceiver 506, or various combinations thereof or various components thereof may be examples of means for performing various aspects of the present disclosure as described herein. For example, the processor 502, the memory 504, the transceiver 506, or various combinations or components thereof may support a method for performing one or more of the operations described herein.
[0091] In some implementations, the processor 502, the memory 504, the transceiver 506, or various combinations or components thereof may be implemented in hardware (e.g., in communications management circuitry) . The hardware may include a processor, a digital signal processor (DSP) , an application-specific integrated circuit (ASIC) , a field-programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic, discrete hardware components, or any combination thereof configured as or otherwise supporting a means for performing the functions described in the present disclosure. In some implementations, the processor 502 and the memory 504 coupled with the processor 502 may be configured to perform one or more of the functions described herein (e.g., executing, by the processor 502, instructions stored in the memory 504) .
[0092] For example, the processor 502 may support wireless communication at the device 500 in accordance with examples as disclosed herein. The device 500 may be an example of a UE 104. In this case, the processor 502 may be configured to operable to support means for receiving, from a network entity, configuration information indicating that each control resource set (CORESET) is configured with one of N CORESET pools, wherein each of the N CORESET pools is associated with more than one joint, downlink (DL) or uplink (UL) indicated beams of M joint, DL or UL indicated beams, where M and N are positive integers and M is greater than N; and means for determining at least one beam of a physical downlink shared channel (PDSCH) scheduled or activated by a fallback DL downlink control information (DCI) format based on the more than one joint or DL indicated beams associated with a CORESET pool where a CORESET in which a first physical downlink control channel (PDCCH) carrying the fallback DL DCI format is transmitted is associated.
[0093] The device 500 may be an example of a network entity 102, e.g. a network entity. In this case, the processor 502 may be configured to operable to support means for transmitting, to a user equipment (UE) , configuration information indicating that each control resource set (CORESET) is configured with one of N CORESET pools, wherein each of the N CORESET pools is associated with more than one joint, downlink (DL) or uplink (UL) indicated beams of M joint, DL or UL indicated beams, where M and N are positive integers and M is greater than N; and means for determining at least one beam of a physical downlink shared channel (PDSCH) scheduled or activated by a fallback DL downlink control information (DCI) format based on the more than one joint or DL indicated beams associated with a CORESET pool where a CORESET in which a first physical downlink control channel (PDCCH) carrying the fallback DL DCI format is transmitted is associated.
[0094] The processor 502 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 implementations, the processor 502 may be configured to operate a memory array using a memory controller. In some other implementations, a memory controller may be integrated into the processor 502. The processor 502 may be configured to execute computer-readable instructions stored in a memory (e.g., the memory 504) to cause the device 500 to perform various functions of the present disclosure.
[0095] The memory 504 may include random access memory (RAM) and read-only memory (ROM) . The memory 504 may store computer-readable, computer-executable code including instructions that, when executed by the processor 502 cause the device 500 to perform various functions described herein. The code may be stored in a non-transitory computer-readable medium such as system memory or another type of memory. In some implementations, the code may not be directly executable by the processor 502 but may cause a computer (e.g., when compiled and executed) to perform functions described herein. In some implementations, the memory 504 may include, 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.
[0096] The I / O controller 508 may manage input and output signals for the device 500. The I / O controller 508 may also manage peripherals not integrated into the device 500. In some implementations, the I / O controller 508 may represent a physical connection or port to an external peripheral. In some implementations, the I / O controller 508 may utilize an operating system such as or another known operating system. In some implementations, the I / O controller 508 may be implemented as part of a processor, such as the processor 502. In some implementations, a user may interact with the device 500 via the I / O controller 508 or via hardware components controlled by the I / O controller 508.
[0097] In some implementations, the device 500 may include a single antenna 510. However, in some other implementations, the device 500 may have more than one antenna 510 (i.e., multiple antennas) , including multiple antenna panels or antenna arrays, which may be capable of concurrently transmitting or receiving multiple wireless transmissions. The transceiver 506 may communicate bi-directionally, via the one or more antennas 510, wired, or wireless links as described herein. For example, the transceiver 506 may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver. The transceiver 506 may also include a modem to modulate the packets, to provide the modulated packets to one or more antennas 510for transmission, and to demodulate packets received from the one or more antennas 510. The transceiver 506 may include one or more transmit chains, one or more receive chains, or a combination thereof.
[0098] A transmit chain may be configured to generate and transmit signals (e.g., control information, data, packets) . The transmit chain may include at least one modulator for modulating data onto a carrier signal, preparing the signal for transmission over a wireless medium. The at least one modulator may be configured to support one or more techniques such as amplitude modulation (AM) , frequency modulation (FM) , or digital modulation schemes like phase-shift keying (PSK) or quadrature amplitude modulation (QAM) . The transmit chain may also include at least one power amplifier configured to amplify the modulated signal to an appropriate power level suitable for transmission over the wireless medium. The transmit chain may also include one or more antennas 510 for transmitting the amplified signal into the air or wireless medium.
[0099] A receive chain may be configured to receive signals (e.g., control information, data, packets) over a wireless medium. For example, the receive chain may include one or more antennas 510 for receive the signal over the air or wireless medium. The receive chain may include at least one amplifier (e.g., a low-noise amplifier (LNA) ) configured to amplify the received signal. The receive chain may include at least one demodulator configured to demodulate the receive signal and obtain the transmitted data by reversing the modulation technique applied during transmission of the signal. The receive chain may include at least one decoder for decoding the processing the demodulated signal to receive the transmitted data.
[0100] FIG. 6 illustrates an example of a processor 600 is suitable for implementing some embodiments of the present disclosure. The processor 600 may be an example of a processor configured to perform various operations in accordance with examples as described herein. The processor 600 may include a controller 602 configured to perform various operations in accordance with examples as described herein. The processor 600 may optionally include at least one memory 604. Additionally, or alternatively, the processor 600 may optionally include one or more arithmetic-logic units (ALUs) 606. One or more of these components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more interfaces (e.g., buses) .
[0101] The processor 600 may be a processor chipset and include a protocol stack (e.g., a software stack) executed by the processor chipset to perform various operations (e.g., receiving, obtaining, retrieving, transmitting, outputting, forwarding, storing, determining, identifying, accessing, writing, reading) in accordance with examples as described herein. The processor chipset may include one or more cores, one or more caches (e.g., memory local to or included in the processor chipset (e.g., the processor 600) or other memory (e.g., random access memory (RAM) , read-only memory (ROM) , dynamic RAM (DRAM) , synchronous dynamic RAM (SDRAM) , static RAM (SRAM) , ferroelectric RAM (FeRAM) , magnetic RAM (MRAM) , resistive RAM (RRAM) , flash memory, phase change memory (PCM) , and others) .
[0102] The controller 602 may be configured to manage and coordinate various operations (e.g., signaling, receiving, obtaining, retrieving, transmitting, outputting, forwarding, storing, determining, identifying, accessing, writing, reading) of the processor 600 to cause the processor 600 to support various operations in accordance with examples as described herein. For example, the controller 602 may operate as a control unit of the processor 600, generating control signals that manage the operation of various components of the processor 600. These control signals include enabling or disabling functional units, selecting data paths, initiating memory access, and coordinating timing of operations.
[0103] The controller 602 may be configured to fetch (e.g., obtain, retrieve, receive) instructions from the memory 504 and determine subsequent instruction (s) to be executed to cause the processor 600 to support various operations in accordance with examples as described herein. The controller 602 may be configured to track memory address of instructions associated with the memory 604. The controller 602 may be configured to decode instructions to determine the operation to be performed and the operands involved. For example, the controller 602 may be configured to interpret the instruction and determine control signals to be output to other components of the processor 600 to cause the processor 600 to support various operations in accordance with examples as described herein. Additionally, or alternatively, the controller 602 may be configured to manage flow of data within the processor 600. The controller 602 may be configured to control transfer of data between registers, arithmetic logic units (ALUs) , and other functional units of the processor 600.
[0104] The memory 604 may include one or more caches (e.g., memory local to or included in the processor 600 or other memory, such RAM, ROM, DRAM, SDRAM, SRAM, MRAM, flash memory, etc. In some implementation, the memory 604 may reside within or on a processor chipset (e.g., local to the processor 600) . In some other implementations, the memory 604 may reside external to the processor chipset (e.g., remote to the processor 600) .
[0105] The memory 604 may store computer-readable, computer-executable code including instructions that, when executed by the processor 600, cause the processor 600 to perform various functions described herein. The code may be stored in a non-transitory computer-readable medium such as system memory or another type of memory. The controller 602 and / or the processor 600 may be configured to execute computer-readable instructions stored in the memory 504 to cause the processor 600 to perform various functions. For example, the processor 600 and / or the controller 602 may be coupled with or to the memory 504, the processor 600, the controller 602, and the memory 504 may be configured to perform various functions described herein. In some examples, the processor 600 may include multiple processors and the memory 604 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.
[0106] The one or more ALUs 606 may be configured to support various operations in accordance with examples as described herein. In some implementation, the one or more ALUs 606 may reside within or on a processor chipset (e.g., the processor 600) . In some other implementations, the one or more ALUs 606 may reside external to the processor chipset (e.g., the processor 600) . One or more ALUs 606 may perform one or more computations such as addition, subtraction, multiplication, and division on data. For example, one or more ALUs 606 may receive input operands and an operation code, which determines an operation to be executed. One or more ALUs 606 be configured with a variety of logical and arithmetic circuits, including adders, subtractors, shifters, and logic gates, to process and manipulate the data according to the operation. Additionally, or alternatively, the one or more ALUs 606 may support logical operations such as AND, OR, exclusive-OR (XOR) , not-OR (NOR) , and not-AND (NAND) , enabling the one or more ALUs 606 to handle conditional operations, comparisons, and bitwise operations.
[0107] The processor 600 may support wireless communication in accordance with examples as disclosed herein. The processor 600 may implemented at a UE 104. In this case, the processor 600 may be configured to operable to support means for receiving, from a network entity, configuration information indicating that each control resource set (CORESET) is configured with one of N CORESET pools, wherein each of the N CORESET pools is associated with more than one joint, downlink (DL) or uplink (UL) indicated beams of M joint, DL or UL indicated beams, where M and N are positive integers and M is greater than N; and means for determining at least one beam of a physical downlink shared channel (PDSCH) scheduled or activated by a fallback DL downlink control information (DCI) format based on the more than one joint or DL indicated beams associated with a CORESET pool where a CORESET in which a first physical downlink control channel (PDCCH) carrying the fallback DL DCI format is transmitted is associated.
[0108] The processor 600 may be implemented at a network entity 102, e.g. a base station. In this case, the processor 600 may be configured to operable to support means for transmitting, to a user equipment (UE) , configuration information indicating that each control resource set (CORESET) is configured with one of N CORESET pools, wherein each of the N CORESET pools is associated with more than one joint, downlink (DL) or uplink (UL) indicated beams of M joint, DL or UL indicated beams, where M and N are positive integers and M is greater than N; and means for determining at least one beam of a physical downlink shared channel (PDSCH) scheduled or activated by a fallback DL downlink control information (DCI) format based on the more than one joint or DL indicated beams associated with a CORESET pool where a CORESET in which a first physical downlink control channel (PDCCH) carrying the fallback DL DCI format is transmitted is associated.
[0109] FIG. 7 illustrates a flowchart of a method 700 performed by a UE in accordance with aspects of the present disclosure. The operations of the method 700 may be implemented by a device or its components as described herein. For example, the operations of the method 700 may be performed by a UE 104 as described herein. In some implementations, the device may execute a set of instructions to control the function elements of the device to perform the described functions. Additionally, or alternatively, the device may perform aspects of the described functions using special-purpose hardware.
[0110] At 710, the method may include receiving, from a network entity, configuration information indicating that each control resource set (CORESET) is configured with one of N CORESET pools, wherein each of the N CORESET pools is associated with more than one joint, downlink (DL) or uplink (UL) indicated beams of M joint, DL or UL indicated beams, where M and N are positive integers and M is greater than N. The operations of 710 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 710 may be performed by a UE 104 as described with reference to FIG. 1.
[0111] At 720, the method may include determining at least one beam of a physical downlink shared channel (PDSCH) scheduled or activated by a fallback DL downlink control information (DCI) format based on the more than one joint or DL indicated beams associated with a CORESET pool where a CORESET in which a first physical downlink control channel (PDCCH) carrying the fallback DL DCI format is transmitted is associated. The operations of 720 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 720 may be performed by a UE 104 as described with reference to FIG. 1.
[0112] FIG. 8 illustrates a flowchart of a method 800 performed by a network entity in accordance with aspects of the present disclosure. The operations of the method 800 may be implemented by a device or its components as described herein. For example, the operations of the method 800 may be performed by a network entity 102 as described herein. In some implementations, the device may execute a set of instructions to control the function elements of the device to perform the described functions. Additionally, or alternatively, the device may perform aspects of the described functions using special-purpose hardware.
[0113] At 810, the method may transmitting, to a user equipment (UE) , configuration information indicating that each control resource set (CORESET) is configured with one of N CORESET pools, wherein each of the N CORESET pools is associated with more than one joint, downlink (DL) or uplink (UL) indicated beams of M joint, DL or UL indicated beams, where M and N are positive integers and M is greater than N. The operations of 810 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 810 may be performed by a network entity 102 as described with reference to FIG. 1.
[0114] At 820, the method may include determining at least one beam of a physical downlink shared channel (PDSCH) scheduled or activated by a fallback DL downlink control information (DCI) format based on the more than one joint or DL indicated beams associated with a CORESET pool where a CORESET in which a first physical downlink control channel (PDCCH) carrying the fallback DL DCI format is transmitted is associated. The operations of 820 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 820 may be performed by a network entity 102 as described with reference to FIG. 1.
[0115] It should be noted that the methods described herein describes 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.
[0116] The various illustrative blocks and components described in connection with the disclosure herein may be implemented or performed with 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.
[0117] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on 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.
[0118] Computer-readable media includes both non-transitory computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A non-transitory storage medium may be any available medium that may be accessed by a general-purpose or special-purpose computer. By way of example, 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.
[0119] As used herein, including in the claims, an article “a” before an element is unrestricted and understood to refer to “at least one” of those elements or “one or more” of those elements. The terms “a, ” “at least one, ” “one or more, ” and “at least one of one or more” may be interchangeable. As used herein, including in the claims, “or” as used in a list of items (e.g., a list of items prefaced by a phrase such as “at least one of” or “one or more of” or “one or both of” ) indicates an inclusive list such that, for example, a list of at least one of A, B, or C means A or B or C or AB or AC or BC or ABC (i.e., A and B and C) . Also, as used herein, the phrase “based on” shall not be construed as a reference to a closed set of conditions. For example, an example step that is described as “based on condition A” may be based on both a condition A and a condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase “based on” shall be construed in the same manner as the phrase “based at least in part on. Further, as used herein, including in the claims, a “set” may include one or more elements.
[0120] 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:a processor; anda transceiver coupled to the processor,wherein the processor is configured to:receive, from a network entity, configuration information indicating that each control resource set (CORESET) is configured with one of N CORESET pools, wherein each of the N CORESET pools is associated with more than one joint, downlink (DL) or uplink (UL) indicated beams of M joint, DL or UL indicated beams, where M and N are positive integers and M is greater than N; anddetermine at least one beam of a physical downlink shared channel (PDSCH) scheduled or activated by a fallback DL downlink control information (DCI) format based on the more than one joint or DL indicated beams associated with a CORESET pool where a CORESET in which a first physical downlink control channel (PDCCH) carrying the fallback DL DCI format is transmitted is associated.2.The UE of claim 1, wherein in a case that the UE is configured with a first radio resource control (RRC) parameter to apply indicated beams for the PDSCH scheduled or activated by the fallback DCI format,the at least one beam of the PDSCH is determined based on the first RRC parameter, from all of the more than one joint or DL indicated beams associated with the CORESET pool where the CORESET in which the first PDCCH carrying the fallback DL DCI format is transmitted is associated.3.The UE of claim 1, wherein in a case that the UE is not configured with a first RRC parameter to apply indicated beams for the PDSCH scheduled or activated by the fallback DCI format, the at least one beam of the PDSCH is determined as one of the following:the first joint or DL indicated beam, from all of the more than one joint or DL indicated beams associated with the CORESET pool where the CORESET in which the first PDCCH carrying the fallback DL DCI format is transmitted is associated; orall of the more than one joint or DL indicated beams associated with the CORESET pool where the CORESET in which the first PDCCH carrying the fallback DL DCI format is transmitted is associated.4.The UE of claim 1, wherein the processor is further configured to:determine at least one beam of a physical uplink shared channel (PUSCH) scheduled or activated by a fallback UL DCI format based on the more than one joint or UL indicated beams associated with a CORESET pool where a CORESET in which a second PDCCH carrying the fallback UL DCI format is transmitted is associated.5.The UE of claim 4, wherein in a case that the UE is configured with a second RRC parameter to apply indicated beams for the PUSCH scheduled or activated by the fallback UL DCI format,the at least one beam of the PUSCH is determined based on the second RRC parameter, from all of the more than one joint or UL indicated beams associated with the CORESET pool where the CORESET in which the second PDCCH carrying the fallback UL DCI format is transmitted is associated.6.The UE of claim 4, wherein in a case that the UE is not configured with a second RRC parameter to apply indicated beams for the PUSCH scheduled or activated by the fallback UL DCI format, the at least one beam of the PUSCH is determined as one of the following:the first joint or UL indicated beam, from all of the more than one joint or UL indicated beams associated with the CORESET pool where the CORESET in which the second PDCCH carrying the fallback UL DCI format is transmitted is associated; orall of the more than one joint or UL indicated beams associated with the CORESET pool where the CORESET in which the second PDCCH carrying the fallback UL DCI format is transmitted is associated.7.The UE of claim 1, wherein the processor is further configured to:receive, from the network entity, a medium access control (MAC) control element (MAC CE) for beam activation, wherein the MAC CE is associated with one of the N CORESET pools, and wherein each codepoint of the MAC CE indicates up to K joint beams, or up to K DL beams, or up to K UL beams, K being a positive integer less than M.8.The UE of claim 7, wherein all beams included in each codepoint of the MAC CE are associated with a same physical cell identity (PCI) , the PCI being a serving cell PCI or a non-serving cell PCI.9.The UE of claim 7, wherein the processor is further configured to:receive, from the network entity, a DCI to update L joint indicated beams, or L DL indicated beams, or L UL indicated beams, L being a positive integer less than K,wherein the updated L joint indicated beams and the unchanged K-L joint indicated beams, or the updated L DL indicated beams and the unchanged K-L DL indicated beams, or the updated L UL indicated beams and the unchanged K-L UL indicated beams associated with a CORESET pool are associated with the same PCI.10.The UE of claim 1, wherein the processor is further configured to:receive, from the network entity, further configuration information indicating asymmetric DL and UL transmission, where M joint indicated beams are indicated to the UE; anddetermine a subset of the M joint indicated beams for DL transmission.11.The UE of claim 10, wherein the subset of M joint indicated beams for DL transmission is determined based on an order in which the M indicated beams are indicated.12.The UE of claim 10, wherein the subset of M joint indicated beams for DL transmission is determined based on an RRC parameter or a MAC CE indicating beams for DL transmission.13.The UE of claim 10, wherein the subset of M joint indicated beam for DL transmission is determined based on a beam selection field of a DCI scheduling a PDSCH transmission.14.The UE of claim 10, wherein the subset of M joint indicated beams for DL transmission includes one or more joint indicated beams from the M joint indicated beams that are not configured with a pathloss offset.15.A network entity comprising:a processor; anda transceiver coupled to the processor,wherein the processor is configured to:transmit, to a user equipment (UE) , configuration information indicating that each control resource set (CORESET) is configured with one of N CORESET pools, wherein each of the N CORESET pools is associated with more than one joint, downlink (DL) or uplink (UL) indicated beams of M joint, DL or UL indicated beams, where M and N are positive integers and M is greater than N; anddetermine at least one beam of a physical downlink shared channel (PDSCH) scheduled or activated by a fallback DL downlink control information (DCI) format based on the more than one joint or DL indicated beams associated with a CORESET pool where a CORESET in which a first physical downlink control channel (PDCCH) carrying the fallback DL DCI format is transmitted is associated.16.The network entity of claim 15, wherein the processor is further configured to:determine at least one beam of a physical uplink shared channel (PUSCH) scheduled or activated by a fallback UL DCI format based on the more than one joint or UL indicated beams associated with a CORESET pool where a CORESET in which a second PDCCH carrying the fallback UL DCI format is transmitted is associated.17.The network entity of claim 15, wherein the processor is further configured to:transmit, to the UE, a medium access control (MAC) control element (MAC CE) for beam activation, wherein the MAC CE is associated with one of the N CORESET pools, and wherein each codepoint of the MAC CE indicates up to K joint beams, or up to K DL beams, or up to K UL beams, K being a positive integer less than M,wherein all beams included in each codepoint of the MAC CE are associated with a same physical cell identity (PCI) , the PCI being a serving cell PCI or a non-serving cell PCI.18.The network entity of claim 15, wherein the processor is further configured to:receive, from the network entity, further configuration information indicating asymmetric DL and UL transmission, where M joint indicated beams are indicated to the UE; anddetermine a subset of the M joint indicated beams for DL transmission.19.A processor for wireless communication, comprising:at least one memory; anda controller coupled with the at least one memory and configured to cause the controller to:receive, from a network entity, configuration information indicating that each control resource set (CORESET) is configured with one of N CORESET pools, wherein each of the N CORESET pools is associated with more than one joint, downlink (DL) or uplink (UL) indicated beams of M joint, DL or UL indicated beams, where M and N are positive integers and M is greater than N; anddetermine at least one beam of a physical downlink shared channel (PDSCH) scheduled or activated by a fallback DL downlink control information (DCI) format based on the more than one joint or DL indicated beams associated with a CORESET pool where a CORESET in which a first physical downlink control channel (PDCCH) carrying the fallback DL DCI format is transmitted is associated.20.A method performed by a user equipment (UE) , the method comprising:receiving, from a network entity, configuration information indicating that each control resource set (CORESET) is configured with one of N CORESET pools, wherein each of the N CORESET pools is associated with more than one joint, downlink (DL) or uplink (UL) indicated beams of M joint, DL or UL indicated beams, where M and N are positive integers and M is greater than N; anddetermining at least one beam of a physical downlink shared channel (PDSCH) scheduled or activated by a fallback DL downlink control information (DCI) format based on the more than one joint or DL indicated beams associated with a CORESET pool where a CORESET in which a first physical downlink control channel (PDCCH) carrying the fallback DL DCI format is transmitted is associated.
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