Random access channel communication types
By using measurement thresholds and virtual SSB mapping, the network entity optimizes random access channel communication selection for uplink TRPs, enhancing uplink coverage and resource utilization in wireless communication systems.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- QUALCOMM INC
- Filing Date
- 2025-01-20
- Publication Date
- 2026-07-23
AI Technical Summary
In wireless communication systems, user equipment (UE) faces challenges in selecting the appropriate type of random access channel communication when accessing uplink transmission reception points (TRPs) that do not transmit downlink signals, leading to misalignment in resource selection and reduced uplink coverage.
A network entity uses measurement information and a threshold to determine the type of random access channel communication, either based on pathloss reference signal reception or transmit beam sweeping, and maps resources to virtual SSBs for accurate selection and synchronization with uplink TRPs.
This approach enhances uplink coverage by ensuring correct detection and combination of random access messages, reducing resource overhead and improving network efficiency.
Smart Images

Figure CN2025073189_23072026_PF_FP_ABST
Abstract
Description
RANDOM ACCESS CHANNEL COMMUNICATION TYPESFIELD OF THE DISCLOSURE
[0001] Aspects of the present disclosure generally relate to wireless communication and specifically relate to techniques, apparatuses, and methods associated with random access channel communication types. INTRODUCTION
[0002] Wireless communication systems are widely deployed to provide various services, which may involve carrying or supporting voice, text, other messaging, video, data, and / or other traffic. Typical wireless communication systems may employ multiple-access radio access technologies (RATs) capable of supporting communication among multiple wireless communication devices including user devices or other devices by sharing the available system resources (for example, time domain resources, frequency domain resources, spatial domain resources, and / or device transmit power, among other examples) . Such multiple-access RATs are supported by technological advancements that have been adopted in various telecommunication standards, which define common protocols that enable different wireless communication devices to communicate on a local, municipal, national, regional, or global level.
[0003] An example telecommunication standard is New Radio (NR) . NR, which may also be referred to as 5G, is part of a continuous mobile broadband evolution promulgated by the Third Generation Partnership Project (3GPP) . NR (and other RATs beyond NR) may be designed to better support enhanced mobile broadband (eMBB) access, Internet of things (IoT) networks or reduced capability device deployments, and ultra-reliable low latency communication (URLLC) applications. To support these verticals, NR systems may be designed to implement a modularized functional infrastructure, a disaggregated and service-based network architecture, network function virtualization, network slicing, multi-access edge computing, millimeter wave (mmWave) technologies including massive multiple-input multiple-output (MIMO) , licensed and unlicensed spectrum access, non-terrestrial network (NTN) deployments, sidelink and other device-to-device direct communication technologies (for example, cellular vehicle-to-everything (CV2X) communication) , multiple-subscriber implementations, high-precision positioning, and / or radio frequency (RF) sensing, among other examples. As the demand for connectivity continues to increase, further improvements in NR may be implemented, and other RATs, such as 6G and beyond, may be introduced to enable new applications and facilitate new use cases.SUMMARY
[0004] In some aspects, a first network entity includes a processing system configured to: receive an indication of a first measurement threshold; receive one or more synchronization signal blocks (SSBs) ; and transmit a random access channel communication that has a type from multiple types, wherein the type is selected based on the first measurement threshold and measurement information associated with the one or more SSBs.
[0005] In some aspects, a first network entity includes a processing system configured to: transmit an indication of a first measurement threshold that is associated with type selection for random access channel communication from multiple types; and receive a random access channel communication that has a type from the multiple types.
[0006] In some aspects, a method of wireless communication performed by a first network entity includes receiving an indication of a first measurement threshold; receiving one or more SSBs; and transmitting a random access channel communication that has a type from multiple types, wherein the type is selected based on the first measurement threshold and measurement information associated with the one or more SSBs.
[0007] In some aspects, a method of wireless communication performed by a first network entity includes transmitting an indication of a first measurement threshold that is associated with type selection for random access channel communication from multiple types; and receiving a random access channel communication that has a type from the multiple types.
[0008] In some aspects, a non-transitory computer-readable medium has instructions stored thereon that, when executed by a first network entity, cause the first network entity to: receive an indication of a first measurement threshold; receive one or more SSBs; and transmit a random access channel communication that has a type from multiple types, wherein the type is selected based on the first measurement threshold and measurement information associated with the one or more SSBs.
[0009] In some aspects, a non-transitory computer-readable medium has instructions stored thereon that, when executed by a first network entity, cause the first network entity to: transmit an indication of a first measurement threshold that is associated with type selection for random access channel communication from multiple types; and receive a random access channel communication that has a type from the multiple types.
[0010] In some aspects, an apparatus for wireless communication includes means for receiving an indication of a first measurement threshold; means for receiving one or more SSBs; and means for transmitting a random access channel communication that has a type from multiple types, wherein the type is selected based on the first measurement threshold and measurement information associated with the one or more SSBs.
[0011] In some aspects, an apparatus for wireless communication includes means for transmitting an indication of a first measurement threshold that is associated with type selection for random access channel communication from multiple types; and means for receiving a random access channel communication that has a type from the multiple types.
[0012] Aspects generally include a method, apparatus, system, computer program product, non-transitory computer-readable medium, user equipment, base station, network entity, network node, wireless communication device, and / or processing system as substantially described herein with reference to and as illustrated by the drawings and specification.
[0013] The foregoing broadly outlines example features and example technical advantages of examples according to the disclosure. Additional example features and example advantages are described hereinafter.BRIEF DESCRIPTION OF THE DRAWINGS
[0014] The appended drawings illustrate certain example aspects of this disclosure and are therefore not limiting in scope. The same reference numbers in different drawings may identify the same or similar elements.
[0015] Fig. 1 is a diagram illustrating an example environment in which apparatuses and / or methods described herein may be implemented, in accordance with the present disclosure.
[0016] Fig. 2 is a diagram illustrating an example of a wireless communication network, in accordance with the present disclosure.
[0017] Fig. 3 is a diagram illustrating an example disaggregated network node architecture, in accordance with the present disclosure.
[0018] Fig. 4 is a diagram illustrating an example of a random access procedure, in accordance with the present disclosure.
[0019] Fig. 5 is a diagram illustrating an example of random access channel occasion groups, in accordance with the present disclosure.
[0020] Fig. 6 is a diagram illustrating an example logical architecture of a distributed RAN, in accordance with the present disclosure.
[0021] Fig. 7 is a diagram illustrating an example of multiple transmission reception point (multi-TRP) communication, in accordance with the present disclosure.
[0022] Fig. 8 is a diagram illustrating a wireless communication network of multi-TRP communication, in accordance with the present disclosure.
[0023] Fig. 9 is a diagram of an example associated with random access channel communication types, in accordance with the present disclosure.
[0024] Fig. 10 is a diagram of an example associated with random access channel communication types, in accordance with the present disclosure.
[0025] Fig. 11 is a diagram of an example associated with thresholds for selection of a random access channel communication type, in accordance with the present disclosure.
[0026] Fig. 12 is a diagram of an example associated with random access channel communication types, in accordance with the present disclosure.
[0027] Figs. 13A and 13B are diagrams of an example associated with random access resource mapping for a random access channel communication type, in accordance with the present disclosure.
[0028] Fig. 14 is a diagram of an example associated with random access resource mapping for a random access channel communication type, in accordance with the present disclosure.
[0029] Fig. 15 is a diagram illustrating an example process performed, for example, at a first network entity or an apparatus of a first network entity, in accordance with the present disclosure.
[0030] Fig. 16 is a diagram illustrating an example process performed, for example, at a first network entity or an apparatus of a first network entity, in accordance with the present disclosure.
[0031] Fig. 17 is a diagram of an example apparatus for wireless communication, in accordance with the present disclosure.
[0032] Fig. 18 is a diagram of an example apparatus for wireless communication, in accordance with the present disclosure.DETAILED DESCRIPTION
[0033] Various aspects of the present disclosure are described hereinafter with reference to the accompanying drawings. However, aspects of the present disclosure may be embodied in many different forms. The present disclosure is not limited to any specific aspect illustrated by or described with reference to an accompanying drawing or otherwise presented in this disclosure. Rather, these aspects are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. The scope of the disclosure covers any aspect of the disclosure disclosed herein, whether implemented independently of or in combination with any other aspect of the disclosure. For example, an apparatus may be implemented or a method may be practiced using various combinations or quantities of the aspects set forth herein. In addition, the scope of the disclosure covers an apparatus having, or a method that is practiced using, other structures and / or functionalities in addition to or other than the structures and / or functionalities with which various aspects of the disclosure set forth herein may be practiced. Any aspect of the disclosure disclosed herein may be embodied by one or more elements of a claim.
[0034] Several aspects of telecommunication systems will now be presented with reference to various methods, operations, apparatuses, and techniques. These methods, operations, apparatuses, and techniques will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, or algorithms (collectively referred to as “elements” ) . These elements may be implemented using hardware, software, or a combination of hardware and software. Whether such elements are implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system.
[0035] In some examples, a user equipment (UE) may perform a random access procedure (e.g., a random access channel (RACH) procedure) with a network node to enable the UE to establish a connection with the network node, such as for an initial access, a link recovery, and / or a beam failure recovery, among other examples. The RACH procedure may include the exchange of one or more random access messages between the UE and the network node. For example, the UE may transmit a preamble, such as physical RACH (PRACH) preamble. In some examples, the UE may utilize resources that are configured (such as via system information signaling) for initiating random access procedures with the network node.
[0036] To enhance uplink coverage and address issues associated with weak signal conditions, the UE may transmit repetitions of one or more random access messages during a RACH procedure. As used herein, “repetition” may refer to an initial transmission of a message and also to a repeated transmission of the message. Thus, each transmission (regardless of whether the transmission is an initial transmission or a retransmission) may be referred to as a repetition. For example, the UE may transmit multiple instances of a random access message (e.g., of a PRACH preamble) in one or more time intervals. This repetition increases the likelihood that at least one transmission of the random access message will be successfully received by the network node, thereby improving the robustness and / or reliability of the random access message. The network node may combine multiple transmissions (e.g., repetitions) of the random access message to improve the reliability of the random access message, such as for a UE located at an edge of a cell coverage area associated with the network node.
[0037] To enable repetitions of a random access message (e.g., to enable the network node to reliably identify and / or combine repetitions of a random access message) , RACH occasions (ROs) may be organized into RO groups. As used herein, “occasion” refers to one or more resources (e.g., time domain resources, frequency domain resources, spatial domain resources, code domain resources, and / or other resources) that are available for, or configured for, the communication (e.g., the transmission and / or the reception) of a communication or message (e.g., an RO may be one or more resources available for, or configured for, the communication of a random access message) . An RO group may include multiple ROs. “RO group” may be used interchangeably herein with “set of ROs” . The configuration or organization of RO groups may enable the network node to identify and / or combine repetitions of a random access message. For example, if a UE is configured to transmit repetitions of a random access message, then the UE may transmit the repetitions during respective ROs included in a given RO group. This enables the network node to identify the ROs in which the repetitions of the random access message are to be transmitted. This organization enables the network node to correctly and / or reliably detect, identify, and / or combine the multiple repetitions of the random access message for efficient signal processing and accurate detection.
[0038] In some cases, one or more transmission reception points (TRPs) may be deployed as uplink TRPs. “Uplink” TRP refers to a TRP that is configured to only receive communications from UEs (e.g., and not transmit communications to UEs) . For example, for an access link, the uplink TRPs may only support uplink (e.g., and not downlink) . In other words, the uplink TRPs may not be configured to transmit information or signals to the UEs. In some examples, the uplink TRPs may communicate signaling to a network entity via the backhaul link, such as based on uplink signaling from a UE, and the network entity may transmit downlink signaling to the UE.
[0039] For example, the UE may transmit uplink signaling to an uplink TRP. In some examples, the UE may communicate with the uplink TRP based on a proximity of the UE to the uplink TRP. For example, the UE may select or be configured with an uplink TRP based on a position of the UE, which may improve uplink coverage of a wireless communication network, and / or reduce uplink pathloss for the UE. The UE may receive downlink signaling from the network entity. For example, the network entity may receive an indication of the uplink signaling via the backhaul interface from the uplink TRP, and the network entity may transmit downlink signaling based on the uplink signaling. Additionally, or alternatively, the network entity may transmit the downlink signaling including an uplink grant for the UE, and the UE may transmit uplink signaling to the uplink TRP based on receiving the downlink signaling from the network entity.
[0040] Accordingly, by implementing one or more uplink TRPs configured for uplink operation, uplink coverage for the wireless communication network may be improved by expanding a coverage area for the UE. Additionally, implementing the one or more uplink TRPs may improve uplink coverage without significantly increasing deployment costs or the complexity of the wireless communication network relative to increasing the quantity of network nodes or network entities (e.g., that support both uplink and downlink) , because uplink TRPs do not transmit downlink signaling and may therefore operate with reduced processing and / or complexity.
[0041] In some examples, the uplink TRPs may be used for initial access for the UE to improve uplink coverage for a random access procedure. However, because the uplink TRPs do not transmit downlink signals, the UE may not receive downlink reference signals from the uplink TRPs. As described elsewhere herein, the UE may use information obtained from one or more downlink reference signals (e.g., measurement information of downlink pathloss reference signals) during a random access procedure, such as for random access occasion selection (e.g., synchronization signal block (SSB) index selection) , spatial direction or beam determination for uplink transmission, and / or repetition determination, among other examples. Therefore, for initial access with an uplink TRP, the UE may transmit repetitions of one or more random access communications (e.g., repetitions of a RAM) . The UE may transmit the repetitions in respective spatial directions and / or using respective beams. For example, the UE may transmit different repetitions in different spatial directions and / or using different beams. For example, the UE may transmit multiple random access channel repetitions using transmit beam sweeping to enable initial access with an uplink TRP. For example, the UE may perform transmit beam sweeping because the UE may not receive a downlink reference signal from the uplink TRP. Therefore, the UE may not obtain an indication of a location or spatial direction of the uplink TRP relative to the location of the UE (e.g., the UE may not know in which spatial direction the UE should transmit, in order to transmit toward the uplink TRP) .
[0042] For initial access with the network entity, the UE may receive a downlink reference signal (e.g., one or more SSBs) from the network entity. Therefore, the UE may perform a random access procedure with the network entity based on the downlink reference signal. As a result, the UE may perform different types of random access for accessing the network entity and an uplink TRP. For example, a first type may be based on reception of a downlink reference signal (e.g., for initial access with the network entity) and a second type may not be based on reception of a downlink reference signal (for example, and may include transmit beam sweeping for initial access with an uplink TRP) . In some examples, it may be beneficial for the UE to perform initial access using a given type. However, because the UE does not receive signals from the uplink TRPs and may not have an active communication connection with the network entity (e.g., to receive an indication of which type of initial access should be performed) , the UE may not be able to determine which type would be beneficial, in different scenarios. In some examples, the UE may perform the first type to access the network entity (e.g., thereby reducing uplink coverage for initial access because the UE does not perform initial access with the uplink TRPs) . In some other examples, the UE may perform the second type to access an uplink TRP when the UE is not physically near any uplink TRPs (e.g., thereby consuming network resources and / or power resources associated with the multiple repetitions involved in the transmit beam sweeping for the second type) .
[0043] Additionally, for repetitions of a random access message, the UE may use ROs from an RO group to enable a receiver (e.g., the network entity or an uplink TRP) to identify and / or combine repetitions of the random access message. As described elsewhere herein, the UE may form or determine an RO group by mapping SSB indexes to respective ROs. However, the UE may not receive SSBs from an uplink TRP. Therefore, it is unclear as to how the UE is to select ROs to transmit the repetitions of the random access message for the second type (e.g., for transmit beam sweeping for the repetitions) . As a result, an uplink TRP and the UE may be misaligned as to ROs in which the repetitions of the random access message are to be transmitted. This may result in misdetection, misidentification, and / or incorrect combining of the multiple repetitions of the random access message.
[0044] Various aspects relate generally to RACH communication types. Some aspects more specifically relate to using measurement information of a pathloss reference signal for selection of a type of RACH communication from multiple types of RACH communications. As used herein, “type of RACH communication” and “type of random access” may be used interchangeably. In some aspects, the multiple types may include a first type that is based on pathloss reference signal (e.g., SSB) reception, such as for random access procedures with a network entity that supports both downlink and uplink. The first type may be associated with repetitions or may not be associated with repetitions. The multiple types may include a second type that is not based on pathloss reference signal (e.g., SSB) reception, such as for random access procedures with an uplink TRP. For example, the second type may be associated with repetitions of a random access message (e.g., a Msg1) in respective spatial directions or using respective transmit beams (e.g., in a transmit beam sweeping manner) .
[0045] In some aspects, a network entity (e.g., a UE) may receive configuration information that includes a first threshold. The first threshold may be used for selection of a type of RACH communication to be transmitted by the UE from the multiple types. For example, the network entity may obtain measurement information based on one or more pathloss reference signals (e.g., one or more SSBs) . The measurement information may indicate a value (e.g., a filtered RSRP value) . The network entity may select a type, from the multiple types, based on whether the value satisfies the first threshold. In some aspects, the network entity may select a type, from multiple types, based on a fixed rule. The rule may be fixed in that the rule is defined, or otherwise fixed, by a wireless communication standard, such as the 3GPP, or defined by a configuration stored by the network entity (such as an original equipment manufacturer configuration) . The network entity may transmit a random access communication (e.g., a Msg1) using the selected type.
[0046] In some aspects, the selected type may be the second type. In such examples, the network entity may select a set of ROs to be used to transmit repetitions of the random access communication (e.g., in respective spatial directions or using respective transmit beams) . The network entity may receive configuration information indicated a quantity of ROs for transmit beam sweeping (e.g., N) , a quantity of ROs for receive beam sweeping (e.g., R) , and a quantity of RO groups. Each RO group may include N × R ROs. The network entity may map RO group indexes to configured ROs (e.g., first in increasing order of frequency domain resources, second in order of increasing time domain resources, and third in order of increased PRACH slot indexes) . In some aspects, ROs for uplink TRPs may be mapped to virtual SSB indexes. “Virtual” SSB refers to a logical representation of an SSB (e.g., where the SSB is not actually transmitted) .
[0047] The network entity may determine one or more sets of ROs for each RO group. The network entity may select (e.g., randomly) an RO group. The network entity may select (e.g., randomly) a set of ROs from the one or more sets of ROs associated with the selected RO group. The network entity may transmit repetitions using respective ROs from the selected set of ROs.
[0048] Particular aspects of the subject matter described in this disclosure can be implemented to realize one or more of the following potential advantages. In some examples, the described techniques can be used to enable the network entity to select which type of RACH communication should be transmitted. For example, by the network entity receiving configuration information indicating the first threshold, the network entity can use measurement information and the first threshold to determine whether the first type or the second type of RACH communication should be transmitted (e.g., to determine whether SSB-based RACH transmissions or transmit beam sweeping RACH transmissions are to be performed) . For example, the network entity may use measurement information from another network entity (e.g., a network node) to determine whether initial access should be performed with the other network entity or with an uplink TRP. By the network entity receiving configuration information (from the other network entity) indicating the first threshold, the other network entity can flexibly indicate the scenarios in which it would be advantageous for the network entity to perform the first type or the second type of RACH communication. This enables the network entity to determine which type of RACH communication is to be performed without receiving signaling or performing measurements associated with the uplink TRP (s) .
[0049] Additionally, by the network entity mapping ROs to RO groups (e.g., rather than SSBs) for random access resources associated with the second type of RACH communication, the network entity can determine which RACH resources are to be used for repetitions of a RACH communication of the second type (e.g., where the repetitions are not based on SSB reception) . As another example, by the network entity mapping ROs to one or more virtual SSBs (e.g., in addition to actual or physical SSBs) for random access resources associated with the second type of RACH communication, the network entity can determine which RACH resources are to be used for repetitions of a RACH communication of the second type (e.g., where the repetitions are not based on SSB reception) when the random access resources are configured for both the first type and the second type. This may conserve signaling overhead that would have otherwise been associated with the network entity receiving separate configurations of random access resources for the first type and the second type. By the network entity mapping the ROs to RO groups or virtual SSBs, the network entity and one or more uplink TRPs may be synchronized as to which ROs are to be used for repetitions of a RACH communication. For example, this enables the network entity and the one or more uplink TRPs to identify the ROs in which the repetition of the RACH communication are to be transmitted. This organization enables the one or more uplink TRPs to correctly and / or reliably detect, identify, and / or combine the multiple repetitions of the RACH communication for efficient signal processing and accurate detection.
[0050] Various aspects of the disclosure are described more fully hereinafter with reference to the accompanying drawings. This disclosure may, however, be embodied in many different forms and is not limited to any specific structure, function, example, aspect, or the like presented throughout this disclosure. This disclosure includes, for example, any aspect disclosed herein, whether implemented independently of or combined with any other aspect of the disclosure. For example, an apparatus may be implemented or a method may be practiced using any number of the aspects set forth herein. In addition, the scope of the disclosure includes such an apparatus or method which is practiced using other structure, functionality, or structure and functionality in addition to or other than the various aspects of the disclosure set forth herein. Any aspect of the disclosure disclosed herein may be embodied by one or more elements of a claim.
[0051] Aspects and examples generally include a method, apparatus, network node, network entity, system, computer program product, non-transitory computer-readable medium, user equipment, base station, wireless communication device, and / or processing system as described or substantially described herein with reference to and as illustrated by the drawings and specification.
[0052] This disclosure may be readily utilized as a basis for modifying or designing other structures for carrying out the same purposes of the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims. Characteristics of the example concepts disclosed herein, both their organization and method of operation, together with associated example advantages, are described in the following description and in connection with the accompanying figures. Each of the figures is provided for the purposes of illustration and description, and not as a definition of the limits of the claims. Each of the figures is provided for the purposes of illustration and description, and not as a definition of the limits of the claims.
[0053] While aspects are described in the present disclosure by illustration to some examples, those skilled in the art understand that such aspects may be implemented in many different arrangements and scenarios. Techniques described herein may be implemented using different platform types, devices, systems, shapes, sizes, and / or packaging arrangements. For example, some aspects may be implemented via integrated chip embodiments or other non-module-component based devices (e.g., end-user devices, vehicles, communication devices, computing devices, industrial equipment, retail / purchasing devices, medical devices, and / or artificial intelligence devices) . Aspects may be implemented in chip-level components, modular components, non-modular components, non-chip-level components, device-level components, and / or system-level components. Devices incorporating described example aspects and example features may include additional example components and example features for implementation and practice of claimed and described aspects. For example, transmission and reception of wireless signals may include one or more components for analog and digital purposes (e.g., hardware components including antennas, radio frequency (RF) chains, power amplifiers, modulators, buffers, processors, interleavers, adders, and / or summers) . Aspects described herein may be practiced in a wide variety of devices, components, systems, distributed arrangements, and / or end-user devices of varying size, shape, and constitution.
[0054] As described above, wireless communication systems may be deployed to provide various services, which may involve carrying or supporting voice, text, other messaging, video, data, and / or other traffic. Some wireless communications systems may employ multiple-access radio access technologies (RATs) . The multiple-access RATs may be capable of supporting communication with multiple wireless communication devices by sharing the available system resources (for example, time domain resources, frequency domain resources, spatial domain resources, and / or device transmit power, among other examples) . Examples of such multiple-access RATs include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single-carrier frequency division multiple access (SC-FDMA) systems, and time division synchronous code division multiple access (TD-SCDMA) systems.
[0055] Multiple-access RATs are supported by technological advancements that have been adopted in various telecommunication standards, which define common protocols that enable wireless communication devices to communicate on a local, municipal, enterprise, national, regional, or global level. For example, 5G New Radio (NR) is part of a continuous mobile broadband evolution promulgated by the Third Generation Partnership Project (3GPP) . 5G NR may support enhanced mobile broadband (eMBB) access, Internet of Things (IoT) networks or reduced capability (RedCap) device deployments, ultra-reliable low-latency communication (URLLC) applications, and / or massive machine-type communication (mMTC) , among other examples.
[0056] To support these and other target verticals, a wireless communication system may be designed to implement a modularized functional infrastructure, a disaggregated and service-based network architecture, network function virtualization, network slicing, multi-access edge computing, millimeter wave (mmWave) technologies including massive multiple-input multiple-output (MIMO) , beamforming, IoT device or RedCap device connectivity and management, industrial connectivity, licensed and unlicensed spectrum access, sidelink and other device-to-device direct communication (for example, cellular vehicle-to-everything (CV2X) communication) , frequency spectrum expansion, overlapping spectrum use, small cell deployments, non-terrestrial network (NTN) deployments, device aggregation, advanced duplex communication (for example, sub-band full-duplex (SBFD) ) , multiple-subscriber implementations, high-precision positioning, RF sensing, network energy savings (NES) , low-power signaling and radios, and / or artificial intelligence or machine learning (AI / ML) , among other examples.
[0057] The foregoing and other technological improvements may support use cases, such as wireless fronthauls, wireless midhauls, wireless backhauls, wireless data centers, extended reality (XR) and metaverse applications, meta services for supporting vehicle connectivity, holographic and mixed reality communication, autonomous and collaborative robots, vehicle platooning and cooperative maneuvering, sensing networks, gesture monitoring, human-brain interfacing, digital twin applications, asset management, and universal coverage applications using non-terrestrial and / or aerial platforms, among other examples.
[0058] As the demand for connectivity continues to increase, further improvements in NR may be implemented, and other RATs, such as 6G and beyond, may be introduced to enable new applications and facilitate new use cases. The methods, operations, apparatuses, and techniques described herein may enable one or more of the foregoing technologies or new technologies and / or support one or more of the foregoing use cases or new use cases.
[0059] Fig. 1 is a diagram illustrating an example environment 100 in which apparatuses and / or methods described herein may be implemented, in accordance with the present disclosure. As shown in Fig. 1, the environment 100 may include a network entity 102, a network entity 104, and a network entity 106, that may communicate with one another via a network 108. The network entities 102, 104, and 106, may be dispersed throughout the network 108, and each network entity 102, 104, and 106 may be stationary and / or mobile. The network 108 may include wired communication connections, wireless communication connections, or a combination of wired and wireless communication connections.
[0060] The network 108 may include, for example, a cellular network (e.g., a Long-Term Evolution (LTE) network, a CDMA network, a 4G network, a 5G network, a 6G network, or another type of next generation network, and / or the like) , a public land mobile network (PLMN) , a local area network (LAN) , a wide area network (WAN) , a metropolitan area network (MAN) , a telephone network (e.g., the Public Switched Telephone Network (PSTN) ) , a private network, an ad hoc network, an intranet, the Internet, a fiber optic-based network, a cloud computing network, or the like, and / or a combination of these or other types of networks. The network 108 may include a wireless communication network 200, described in connection with Fig. 2.
[0061] As described herein, a network entity (which may alternatively be referred to as an entity, a node, a network node, or a wireless entity) may be, be similar to, include, or be included in (e.g., be a component of) a base station (e.g., any base station described herein, including a disaggregated base station) , a UE (e.g., any UE described herein) , a reduced capability (RedCap) device, an enhanced reduced capability (eRedCap) device, an ambient internet-of-things (IoT) device, an energy harvesting (EH) -capable device, a network controller, an apparatus, a device, a computing system, an integrated access and backhauling (IAB) node, a distributed unit (DU) , a central unit (CU) , a remote / radio unit (RU) (which may also be referred to as a remote radio unit (RRU) ) , and / or another processing entity configured to perform any of the techniques described herein. For example, a network entity may be a UE. As another example, a network entity may be a base station. As used herein, “network entity” may refer to an entity that is configured to operate in a network, such as the network 108. For example, a “network entity” is not limited to an entity that is currently located in and / or currently operating in the network. Rather, a network entity may be any entity that is capable of communicating and / or operating in the network. A network entity may include a network node 210 or a UE 220, described in more detail in connection with Fig. 2.
[0062] The adjectives “first, ” “second, ” “third, ” and so on are used for contextual distinction between two or more of the modified noun in connection with a discussion and are not meant to be absolute modifiers that apply only to a certain respective entity throughout the entire document. For example, a network entity may be referred to as a “first network entity” in connection with one discussion and may be referred to as a “second network entity” in connection with another discussion, or vice versa. As an example, a first network entity may be configured to communicate with a second network entity or a third network entity. In one aspect of this example, the first network entity may be a UE, the second network entity may be a base station, and the third network entity may be a UE. In another aspect of this example, the first network entity may be a UE, the second network entity may be a base station, and the third network entity may be a base station. In yet other aspects of this example, the first, second, and third network entities may be different relative to these examples.
[0063] Similarly, reference to a UE, base station, apparatus, device, computing system, or the like may include disclosure of the UE, base station, apparatus, device, computing system, or the like being a network entity. For example, disclosure that a UE is configured to receive information from a base station also discloses that a first network entity is configured to receive information from a second network entity. Consistent with this disclosure, once a specific example is broadened in accordance with this disclosure (e.g., a UE is configured to receive information from a base station also discloses that a first network entity is configured to receive information from a second network entity) , the broader example of the narrower example may be interpreted in the reverse, but in a broad open-ended way. In the example above where a UE is configured to receive information from a base station also discloses that a first network entity is configured to receive information from a second network entity, “first network entity” may refer to a first UE, a first base station, a first apparatus, a first device, a first computing system, a first set of one or more one or more components, a first processing entity, or the like configured to receive the information; and “second network entity” may refer to a second UE, a second base station, a second apparatus, a second device, a second computing system, a second set of one or more components, a second processing entity, or the like.
[0064] As described herein, communication of information (e.g., any information, signal, or the like) may be described in various aspects using different terminology. Disclosure of one communication term includes disclosure of other communication terms. For example, a first network entity may be described as being configured to transmit information to a second network entity. In this example and consistent with this disclosure, disclosure that the first network entity is configured to transmit information to the second network entity includes disclosure that the first network entity is configured to provide, send, output, communicate, or transmit information to the second network entity. Similarly, in this example and consistent with this disclosure, disclosure that the first network entity is configured to transmit information to the second network entity includes disclosure that the second network entity is configured to receive, obtain, or decode the information that is provided, sent, output, communicated, or transmitted by the first network entity.
[0065] As shown, the network entity 102 may include a processing system 110. Similarly, the network entity 106 may include a processing system 112. A processing system may include one or more components (or subcomponents) , such as one or more components described herein. For example, a respective component of the one or more components may be, be similar to, include, or be included in at least one memory, at least one communication interface, or at least one processor. For example, a processing system may include one or more components. In such an example, the one or more components may include a first component, a second component, and a third component. In this example, the first component may be coupled to a second component and a third component. In this example, the first component may be at least one processor, the second component may be a communication interface, and the third component may be at least one memory. A processing system may generally be a system including one or more components that may perform one or more functions, such as any function or combination of functions described herein. For example, one or more components may receive input information (e.g., any information that is an input, such as a signal, any digital information, or any other information) , one or more components may process the input information to generate output information (e.g., any information that is an output, such as a signal or any other information) , one or more components may perform any function as described herein, or any combination thereof. A processing system (which may include the processing system 110 and the processing system 112) is described in more detail in connection with Fig. 2, such as in connection with processing system 240 and processing system 245.
[0066] As described herein, an “input” and “input information” may be used interchangeably. Similarly, as described herein, an “output” and “output information” may be used interchangeably. Any information generated by any component may be provided to one or more other systems or components of, for example, a network entity described herein. For example, a processing system may include a first component configured to receive or obtain information, a second component configured to process the information to generate output information, and / or a third component configured to provide the output information to other systems or components. In this example, the first component may be a communication interface (e.g., a first communication interface) , the second component may be at least one processor (e.g., that is coupled to the communication interface and / or at least one memory) , and the third component may be a communication interface (e.g., the first communication interface or a second communication interface) . For example, a processing system may include at least one memory, at least one communication interface, and / or at least one processor, where the at least one processor may, for example, be coupled to the at least one memory and the at least one communication interface.
[0067] A processing system of a network entity described herein may interface with one or more other components of the network entity, may process information received from one or more other components (such as input information) , or may output information to one or more other components. For example, a processing system may include a first component configured to interface with one or more other components of the network entity to receive or obtain information, a second component configured to process the information to generate one or more outputs, and / or a third component configured to output the one or more outputs to one or more other components. In this example, the first component may be a communication interface (e.g., a first communication interface) , the second component may be at least one processor (e.g., that is coupled to the communication interface and / or at least one memory) , and the third component may be a communication interface (e.g., the first communication interface or a second communication interface) . For example, a chip or modem of the network entity may include a processing system. The processing system may include a first communication interface to receive or obtain information, and a second communication interface to output, transmit, or provide information. In some examples, the first communication interface may be an interface configured to receive input information, and the information may be provided to the processing system. In some examples, the second system interface may be configured to transmit information output from the chip or modem. The second communication interface may also obtain or receive input information, and the first communication interface may also output, transmit, or provide information.
[0068] For example, as shown in Fig. 1, the processing system 110 may include a (e.g., one or more) communication manager 114 and one or more communication interfaces 116. The communication manager 114 may be configured to perform one or more communication tasks as described herein. In some aspects, the communication manager 114 may direct the communication interface 120 and / or the processing system 110 to perform one or more communication tasks as described herein. Similarly, the processing system 112 may include a (e.g., one or more) communication manager 118 and one or more communication interfaces 120. The communication manager 118 may be configured to perform one or more communication tasks as described herein. In some aspects, the processing system 112 and / or the communication manager 118 may direct the communication interface 120 to perform one or more communication tasks as described herein. Although depicted, for clarity of description, with reference only to the network entities 102 and 104, any one or more of the network entities 102, 104, and 106 also may include a communication manager and a communication interface.
[0069] As used herein, “communication interface” refers to an interface that enables communication (e.g., wireless communication, wired communication, or a combination thereof) between a first network entity and a second network entity. A communication interface may include electronic circuitry that enables a network entity to transmit, receive, or otherwise perform the communication. A communication interface may be, be similar to, include, or be included in one or more components that are configured to enable communication between the first network entity and the second network entity. For example, a communication interface may include a transmission component, a reception component, and / or a transceiver, among other examples. For example, a communication interface may include one or more transceivers, one or more receivers, and / or one or more transmitters configured to communicate with other devices, such as via a wired connection, a wireless connection, or a combination of wired and wireless connections. In some examples, a communication interface may include one or more RF components, an RF front end, one or more antennas, one or more transmit or receive processors, a demodulation component, and / or a modulation component, among other examples.
[0070] A communication interface may include a transmission component and / or a reception component. For example, a communication interface may include a transceiver and / or one or more separate receivers and / or transmitters that enable a network entity to communicate with other devices, such as via a wired connection, a wireless connection, or a combination of wired and wireless connections. In some examples, a communication interface may include one or more radio frequency reflective elements and / or one or more radio frequency refractive elements. The communication interface may enable the network entity to receive information from another apparatus and / or provide information to another apparatus. In some examples, the communication interface may include an Ethernet interface, an optical interface, a coaxial interface, an infrared interface, an RF interface, a universal serial bus (USB) interface, a Wi-Fi interface, a cellular network interface, a wireless modem, an inter-integrated circuit (I2C) , and / or a serial peripheral interface (SPI) , among other examples.
[0071] As described herein, a network entity (e.g., the network entity 102 and / or the network entity 106) may be configured to perform one or more operations. Reference to a network entity being configured to perform one or more operations may refer to a processing system of the network entity being configured to perform the one or more operations and / or the processing system being configured to cause one or more components of the network entity to perform the one or more operations. For example, reference to the processing system being configured to perform one or more operations may refer to one or more components (or subcomponents) of the processing system performing the one or more operations. For example, the one or more components of the processing system may include at least one memory, at least one processor, and / or at least one communication interface, among other examples, that are configured to perform one or more (or all) of the one or more operations, and / or any combination thereof. Where reference is made to the network entity and / or the processing system being configured to perform operations, the network entity and / or the processing system may be configured to cause one component to perform all operations, or to cause more than one component to collectively perform the operations. When the network entity and / or the processing system is configured to cause more than one component to collectively perform the operations, each operation need not be performed by each of those components (e.g., different operations may be performed by different components) and / or each operation need not be performed in whole by only one component (e.g., different components may perform different sub-functions of an operation) .
[0072] As described in more detail elsewhere herein, the network entity 102 may (e.g., the processing system 110 may, or the processing system 110 may cause the communication manager 114 and / or the communication interface 116 to) receive an indication of a first measurement threshold; receive one or more SSBs; and transmit a random access channel communication that has a type from multiple types, wherein the type is selected based on the first measurement threshold and measurement information associated with the one or more SSBs. Additionally, or alternatively, the network entity 102 and / or the communication manager 114 may perform one or more other operations described herein.
[0073] As described in more detail elsewhere herein, the network entity 106 may (e.g., the processing system 112 may, or the processing system 112 may cause the communication manager 118 and / or the communication interface 120 to) transmit an indication of a first measurement threshold that is associated with type selection for random access channel communication from multiple types; and receive a random access channel communication that has a type from the multiple types. Additionally, or alternatively, the network entity 106 and / or the communication manager 118 may perform one or more other operations described herein.
[0074] The number and arrangement of entities shown in Fig. 1 are provided as one or more examples. In practice, there may be additional network entities and / or networks, fewer network entities and / or networks, different network entities and / or networks, or differently arranged network entities and / or networks than those shown in Fig. 1. Furthermore, the network entity 102, 104, and 106 may be implemented using a single apparatus or multiple apparatuses.
[0075] Fig. 2 is a diagram illustrating an example of a wireless communication network 200, in accordance with the present disclosure. The wireless communication network 200 may be or may include elements of a 5G (or NR) network or a 6G network, among other examples. The wireless communication network 200 may include multiple network nodes 210. For example, in Fig. 2, the wireless communication network 200 includes a network node (NN) 210a and a network node 210b. The network nodes 210 may support communications with multiple UEs 220. For example, in Fig. 2, the network nodes 210 support communication with a UE 220a, a UE 220b, and a UE 220c. In some examples, a UE 220 may also communicate with other UEs 220 and a network node 210 may communicate with a core network and with other network nodes 210.
[0076] The network nodes 210 and the UEs 220 of the wireless communication network 200 may communicate using the electromagnetic spectrum, which may be subdivided by frequency or wavelength into various classes, bands, carriers, and / or channels. For example, devices of the wireless communication network 200 may communicate using one or more operating bands. In some aspects, multiple wireless communication networks 200 may be deployed in a given geographic area. Each wireless communication network 200 may support a particular RAT (which may also be referred to as an air interface) and may operate on one or more carrier frequencies in one or more frequency bands or ranges. In some examples, when multiple RATs are deployed in a given geographic area, each RAT in the geographic area may operate on different frequencies to avoid interference with other RATs. Additionally or alternatively, in some examples, the wireless communication network 200 may implement dynamic spectrum sharing (DSS) , in which multiple RATs are implemented with dynamic bandwidth allocation (for example, based on user demand) in a single frequency band. In some examples, the wireless communication network 200 may support communication over unlicensed spectrum, where access to an unlicensed channel is subject to a channel access mechanism. For example, in a shared or unlicensed frequency band, a transmitting device may perform a channel access procedure, such as a listen-before-talk (LBT) procedure, to contend against other devices for channel access before transmitting on a shared or unlicensed channel.
[0077] Various operating bands have been defined as frequency range designations FR1 (410 MHz through 7.125 GHz) , FR2 (24.25 GHz through 52.6 GHz) , FR3 (7.125 GHz through 24.25 GHz) , FR4a or FR4-1 (52.6 GHz through 71 GHz) , FR4 (52.6 GHz through 114.25 GHz) , and FR5 (114.25 GHz through 300 GHz) . Although a portion of FR1 is greater than 6 GHz, FR1 is often referred to (interchangeably) as a “sub-6 GHz” band in some documents and articles. Similarly, FR2 is often referred to (interchangeably) as a “millimeter wave” band in some documents and articles, despite being different than the extremely high frequency (EHF) band (30 GHz through 300 GHz) , which is identified by the International Telecommunications Union (ITU) as a “millimeter wave” band. The frequencies between FR1 and FR2 are often referred to as mid-band frequencies, which include FR3. Frequency bands falling within FR3 may inherit FR1 characteristics or FR2 characteristics, and thus may effectively extend features of FR1 or FR2 into the mid-band frequencies. Thus, “sub-6 GHz, ” if used herein, may broadly refer to frequencies that are less than 6 GHz, that are within FR1, and / or that are included in mid-band frequencies. Similarly, the term “millimeter wave, ” if used herein, may broadly refer to mid-band frequencies or to frequencies that are within FR2, FR4, FR4-aor FR4-1, FR5, and / or the EHF band. Higher frequency bands may extend 5G NR operation, 6G operation, and / or other RATs beyond 52.6 GHz.
[0078] A network node 210 and / or a UE 220 may include one or more devices, components, or systems that enable communication with other devices, components, or systems of the wireless communication network 200. For example, a UE 220 and a network node 210 may each include one or more chips, system-on-chips (SoCs) , chipsets, packages, or devices that individually or collectively constitute or comprise a processing system, such as a processing system 240 of the UE 220 or a processing system 245 of the network node 210. The processing system 240 and the processing system 245 may be similar to other processing systems described herein, such as the processing system 110 and the processing system 112. A processing system (for example, the processing system 240 and / or the processing system 245) includes processor (or “processing” ) circuitry in the form of one or multiple processors, microprocessors, processing units (such as central processing units (CPUs) , graphics processing units (GPUs) , neural processing units (NPUs) (also referred to as neural network processors or deep learning processors (DLPs) ) , and / or digital signal processors (DSPs) ) , processing blocks, application-specific integrated circuits (ASICs) , programmable logic devices (PLDs) , or other discrete gate or transistor logic or circuitry (any one or more of which may be generally referred to herein individually as a “processor” or collectively as “the processor” or “the processor circuitry” ) . Such processors may be individually or collectively configurable or configured to perform various functions or operations described herein. A group of processors collectively configurable or configured to perform a set of functions may include a first processor configurable or configured to perform a first function of the set and a second processor configurable or configured to perform a second function of the set. In some other examples, each of a group of processors may be configurable or configured to perform a same set of functions.
[0079] The processing system 240 and the processing system 245 may each include memory circuitry in the form of one or multiple memory devices, memory blocks, memory elements, or other discrete gate or transistor logic or circuitry, each of which may include or implement tangible storage media such as random-access memory or read-only memory, or combinations thereof (any one or more of which may be generally referred to herein individually as a “memory” or collectively as “the memory” or “the memory circuitry” ) . One or more of the memories may be coupled (for example, operatively coupled, communicatively coupled, electronically coupled, or electrically coupled) with one or more of the processors and may individually or collectively store processor-executable code or instructions (such as software) that, when executed by one or more of the processors, may configure one or more of the processors to perform various functions or operations described herein. Additionally or alternatively, in some examples, one or more of the processors may be configured to perform various functions or operations described herein without requiring configuration by software. “Software” shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, or functions, among other examples, whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.
[0080] The processing system 240 and the processing system 245 may each include or be coupled with one or more modems (such as a cellular (for example, a 5G or 6G compliant) modem) . In some examples, one or more processors of the processing system 240 and / or the processing system 245 include or implement one or more of the modems. The processing system 240 and the processing system 245 may also include or be coupled with multiple radios (collectively “the radio” ) , multiple RF chains, or multiple transceivers, each of which may in turn be coupled with one or more of multiple antennas. In some examples, one or more processors of the processing system 240 and / or the processing system 245 include or implement one or more of the radios, RF chains, or transceivers. An RF chain may include one or more filters, mixers, oscillators, amplifiers, analog-to-digital converters (ADCs) , and / or other devices that convert between an analog signal (such as for transmission or reception via an air interface) and a digital signal (such as for processing by the processing system 240 of the UE 220 or by the processing system 245 of the network node 210) .
[0081] A network node 210 and a UE 220 may each include one or multiple antennas or antenna arrays. Typical network nodes 210 and UEs 220 may include multiple antennas, which may be organized or structured into one or more antenna panels, one or more antenna groups, one or more sets of antenna elements, or one or more antenna arrays, among other examples. As used herein, the term “antenna” can refer to one or more antennas, one or more antenna panels, one or more antenna groups, one or more sets of antenna elements, or one or more antenna arrays. The term “antenna panel” can refer to a group of antennas (such as antenna elements) arranged in an array or panel, which may facilitate beamforming by manipulating parameters associated with the group of antennas. The term “antenna module” may refer to circuitry including one or more antennas as well as one or more other components (such as filters, amplifiers, or processors) associated with integrating the antenna module into a wireless communication device such as the network node 210 and the UE 220.
[0082] A network node 210 may be, may include, or may also be referred to as an NR network node, a 5G network node, a 6G network node, a Node B, a gNB, an access point (AP) , a transmission reception point (TRP) , a network entity, a network element, a network equipment, and / or another type of device, component, or system included in a radio access network (RAN) . In various deployments, a network node 210 may be implemented as a single physical node (for example, a single physical structure) or may be implemented as two or more physical nodes (for example, two or more distinct physical structures) . For example, a network node 210 may be a device or system that implements a part of a radio protocol stack, a device or system that implements a full radio protocol stack (such as a full gNB protocol stack) , or a collection of devices or systems that collectively implement the full radio protocol stack. For example, and as shown, a network node 210 may be an aggregated network node having an aggregated architecture, meaning that the network node 210 may implement a full radio protocol stack that is physically and logically integrated within a single physical structure in the wireless communication network 200. For example, an aggregated network node 210 may consist of a single standalone base station or a single TRP that operates with a full radio protocol stack to enable or facilitate communication between a UE 220 and a core network of the wireless communication network 200.
[0083] Alternatively, and as also shown, a network node 210 may be a disaggregated network node (sometimes referred to as a disaggregated base station) , having a disaggregated architecture, meaning that the network node 210 may operate with a radio protocol stack that is physically distributed and / or logically distributed among two or more nodes in the same geographic location or in different geographic locations. An example disaggregated network node architecture is described in more detail below with reference to Fig. 2. In some deployments, disaggregated network nodes 210 may be used in an integrated access and backhaul (IAB) network, in an open radio access network (O-RAN) (such as a network configuration in compliance with the O-RAN Alliance) , or in a virtualized radio access network (vRAN) , also known as a cloud radio access network (C-RAN) , to facilitate scaling by separating network functionality into multiple units or modules that can be individually deployed.
[0084] The network nodes 210 of the wireless communication network 200 may include one or more CUs, one or more DUs, and one or more RUs. A CU may host one or more higher layers, such as a radio resource control (RRC) layer, a packet data convergence protocol (PDCP) layer, and a service data adaptation protocol (SDAP) layer, among other examples. A DU may host one or more of a radio link control (RLC) layer, a medium access control (MAC) layer, and / or one or more higher physical (PHY) layers depending, at least in part, on a functional split, such as a functional split defined by the 3GPP. In some examples, a DU also may host a lower PHY layer that is configured to perform functions, such as a fast Fourier transform (FFT) , an inverse FFT (IFFT) , beamforming, and / or physical random access channel (PRACH) extraction and filtering, among other examples. An RU may perform RF processing functions or lower PHY layer functions, such as an FFT, an IFFT, beamforming, or PRACH extraction and filtering, among other examples, according to a functional split, such as a lower layer split (LLS) . In such an architecture, each RU can be operated to handle over the air (OTA) communication with one or more UEs 220. In some examples, a single network node 210 may include a combination of one or more CUs, one or more DUs, and / or one or more RUs. In some examples, a CU, a DU, and / or an RU may be implemented as a virtual unit, such as a virtual central unit (VCU) , a virtual distributed unit (VDU) , or a virtual radio unit (VRU) , among other examples, which may be implemented as a virtual network function, such as in a cloud deployment.
[0085] Some network nodes 210 (for example, a base station, an RU, or a TRP) may provide communication coverage for a particular geographic area. The term “cell” can refer to a coverage area of a network node 210 or to a network node 210 itself, depending on the context in which the term is used. A network node 210 may support one or more cells (for example, each cell may support communication within an angular (for example, 60 degree) range around the network node) . In some examples, a network node 210 may provide communication coverage for a macro cell, a pico cell, a femto cell, or another type of cell. A macro cell may cover a relatively large geographic area (for example, several kilometers in radius) and may allow unrestricted access by UEs 220 with associated service subscriptions. A pico cell may cover a relatively small geographic area and may also allow unrestricted access by UEs 220 with associated service subscriptions. A femto cell may cover a relatively small geographic area (for example, a home) and may allow restricted access by UEs 220 having association with the femto cell (for example, UEs 220 in a closed subscriber group (CSG) ) . In some examples, a cell may not necessarily be stationary. For example, the geographic area of the cell may move according to the location of an associated mobile network node 210 (for example, a train, a satellite, an unmanned aerial vehicle, or an NTN network node) .
[0086] The wireless communication network 200 may be a heterogeneous network that includes network nodes 210 of different types, such as macro network nodes, pico network nodes, femto network nodes, relay network nodes, aggregated network nodes, and / or disaggregated network nodes, among other examples. Various different types of network nodes 210 may generally transmit at different power levels, serve different coverage areas (for example, a cell 230a and a cell 230b) , and / or have different impacts on interference in the wireless communication network 200 than other types of network nodes 210.
[0087] The UEs 220 may be physically dispersed throughout the coverage area of the wireless communication network 200, and each UE 220 may be stationary or mobile. A UE 220 may be, may include, or may also be referred to as an access terminal, a mobile station, or a subscriber unit. A UE 220 may be, include, or be coupled with a cellular phone (for example, a smart phone) , a personal digital assistant (PDA) , a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet, a camera, a netbook, a smartbook, an ultrabook, a medical device, a biometric device, a wearable device (for example, a smart watch, smart clothing, smart glasses, a smart wristband, smart jewelry) , a gaming device, an entertainment device (for example, a music device, a video device, or a satellite radio) , an XR device, a vehicular component or sensor, a smart meter or sensor, industrial manufacturing equipment, a Global Navigation Satellite System (GNSS) device (such as a Global Positioning System device or another type of positioning device) , a UE function of a network node, and / or any other suitable device or function that may communicate via a wireless medium.
[0088] Some UEs 220 may be classified according to different categories in association with different complexities and / or different capabilities. UEs 220 in a first category may facilitate massive IoT in the wireless communication network 200, and may offer low complexity and / or cost relative to UEs 220 in a second category. UEs 220 in a second category may include mission-critical IoT devices, legacy UEs, baseline UEs, high-tier UEs, advanced UEs, full-capability UEs, and / or premium UEs that are capable of URLLC, eMBB, and / or precise positioning in the wireless communication network 200, among other examples. A third category of UEs 220 may have mid-tier complexity and / or capability (for example, a capability between that of the UEs 220 of the first category and that of the UEs 220 of the second capability) . A UE 220 of the third category may be referred to as a reduced capability UE ( “RedCap UE” ) , a mid-tier UE, an NR-Light UE, and / or an NR-Lite UE, among other examples. RedCap UEs may bridge a gap between the capability and complexity of NB-IoT devices and / or eMTC UEs, and mission-critical IoT devices and / or premium UEs. RedCap UEs may include, for example, wearable devices, IoT devices, industrial sensors, or cameras that are associated with a limited bandwidth, power capacity, and / or transmission range, among other examples. RedCap UEs may support healthcare environments, building automation, electrical distribution, process automation, transport and logistics, or smart city deployments, among other examples.
[0089] In some examples, a network node 210 may be, may include, or may operate as an RU, a TRP, or a base station that communicates with one or more UEs 220 via a radio access link (which may be referred to as a “Uu” link) . The radio access link may include a downlink and an uplink. “Downlink” (or “DL” ) refers to a communication direction from a network node 210 to a UE 220, and “uplink” (or “UL” ) refers to a communication direction from a UE 220 to a network node 210. Downlink and uplink resources may include time domain resources (for example, frames, subframes, slots, and symbols) , frequency domain resources (for example, frequency bands, component carriers (CCs) , subcarriers, resource blocks, and resource elements) , and spatial domain resources (for example, particular transmit directions or beams) .
[0090] Frequency domain resources may be subdivided into bandwidth parts (BWPs) . A BWP may be a block of frequency domain resources (for example, a continuous set of resource blocks (RBs) within a full component carrier bandwidth) that may be configured at a UE-specific level. A UE 220 may be configured with both an uplink BWP and a downlink BWP (which may be the same or different) . Each BWP may be associated with its own numerology (indicating a sub-carrier spacing (SCS) and cyclic prefix (CP) ) . A BWP may be dynamically configured or activated (for example, by a network node 210 transmitting a downlink control information (DCI) configuration to the one or more UEs 220) and / or reconfigured (for example, in real-time or near-real-time) according to changing network conditions in the wireless communication network 200 and / or specific requirements of one or more UEs 220. An active BWP defines the operating bandwidth of the UE 220 within the operating bandwidth of the serving cell. The use of BWPs enables more efficient use of the available frequency domain resources in the wireless communication network 200 because fewer frequency domain resources may be allocated to a BWP for a UE 220 (which may reduce the quantity of frequency domain resources that a UE 220 is required to monitor and reduce UE power consumption by enabling the UE to monitor fewer frequency domain resources) , leaving more frequency domain resources to be spread across multiple UEs 220. Thus, BWPs may also assist in the implementation of lower-capability (for example, RedCap) UEs 220 by facilitating the configuration of smaller bandwidths for communication by such UEs 220 and / or by facilitating reduced UE power consumption.
[0091] As used herein, a downlink signal may be or include a reference signal, control information, or data. For example, downlink reference signals include a primary synchronization signal (PSS) , a secondary SS (SSS) , an SS block (SSB) (for example, that includes a PSS, an SSS, and a physical broadcast channel (PBCH) ) , a demodulation reference signal (DMRS) , a phase tracking reference signal (PTRS) , a tracking reference signal (TRS) , and a channel state information (CSI) reference signal (CSI-RS) , among other examples. A downlink signal carrying control information or data may be transmitted via a downlink channel. Downlink channels may include one or more control channels for transmitting control information and one or more data channels for transmitting data. Downlink reference signals may be transmitted in addition to, or multiplexed with, downlink control channel communications and / or downlink data channel communications. A downlink control channel may be specifically used to transmit DCI from a network node 210 to a UE 220. DCI generally contains the information the UE 220 needs to identify RBs in a subsequent subframe and how to decode them, including a modulation and coding scheme (MCS) or redundancy version parameters. Different DCI formats carry different information, such as scheduling information in the form of downlink or uplink grants, slot formal indicators (SFIs) , preemption indicators (PIs) , transmit power control (TPC) commands, hybrid automatic repeat request (HARQ) information, new data indicators (NDIs) , among other examples. A downlink data channel may be used to transmit downlink data (for example, user data associated with a UE 220) from a network node 210 to a UE 220. Downlink control channels may include physical downlink control channels (PDCCHs) , and downlink data channels may include physical downlink shared channels (PDSCHs) . Control information or data communications may be transmitted on a PDCCH and PDSCH, respectively. For example, a PDCCH can carry DCI, while a PDSCH can carry a MAC control element (MAC-CE) , an RRC message, or user data, among other examples. Each PDSCH may carry one or more transport blocks (TBs) of data.
[0092] As used herein, an uplink signal may include a reference signal, control information, or data. For example, uplink reference signals include a sounding reference signal (SRS) , a PTRS, and a DMRS, among other examples. An uplink signal carrying control information or data may be transmitted via an uplink channel. An uplink channel may include one or more control channels for transmitting control information and one or more data channels for transmitting data. Uplink reference signals may be transmitted in addition to, or multiplexed with, uplink control channel communications and / or uplink data channel communications. An uplink control channel may be specifically used to transmit uplink control information (UCI) from a UE 220 to a network node 210. An uplink data channel may be used to transmit uplink data (for example, user data associated with a UE 220) from a UE 220 to a network node 210. Uplink control channels may include physical uplink control channels (PUCCHs) , and uplink data channels may include physical uplink shared channels (PUSCHs) . Control information or data communications may be transmitted on a PUCCH and PUSCH, respectively. For example, a PUCCH can carry UCI, while a PUSCH can carry a MAC-CE, an RRC message, or user data, among other examples. UCI can include a scheduling request (SR) , HARQ feedback information (for example, a HARQ acknowledgement (ACK) indication or a HARQ negative acknowledgement (NACK) indication) , uplink power control information (for example, an uplink TPC parameter) , and / or CSI, among other examples. CSI can include a channel quality indicator (CQI) (indicative of downlink channel conditions to facilitate selection of transmission parameters, such as an MCS, by a network node 210) , a precoding matrix indicator (PMI) , a CSI-RS resource indicator (CRI) (for example, indicative of a beam used to transmit a CSI-RS) , an SS / PBCH resource block indicator (SSBRI) (for example, indicative of a beam used to transmit an SSB) , a layer indicator (LI) , a rank indicator (RI) , and / or measurement information (for example, a layer 1 (L1) -reference signal received power (RSRP) parameter, a received signal strength indicator (RSSI) parameter, a reference signal received quality (RSRQ) parameter, among other examples) which can be used for beam management, among other examples. Each PUSCH may carry one or more TBs of data.
[0093] The information (for example, data, control information, or reference signal information) transmitted by a network node 210 to a UE 220, or vice versa, may be represented as a sequence of binary bits that are mapped (for example, modulated) to an analog signal waveform (for example, a discrete Fourier transform (DFT) -spread-orthogonal frequency division multiplexing (OFDM) (DFT-s-OFDM) waveform or a CP-OFDM waveform) that is transmitted by the network node 210 or UE 220 over a wireless communication channel. In some examples, the network node 210 or the UE 220 (for example, using the processing system 245 or the processing system 240, respectively) may select an MCS (for example, an order of quadrature amplitude modulation (QAM) , such as 64-QAM, 128-QAM, or 256-QAM, among other examples) for a downlink signal or an uplink signal. For example, the network node 210 may select an MCS for a downlink signal in accordance with UCI received from the UE 220. The network node 210 may transmit, to the UE 220, an indication of the selected MCS for the downlink signal, such as via DCI that schedules the downlink signal. As another example, the network node 210 may transmit, and the UE 220 may receive, an indication of an MCS to be applied for the one or more uplink signals, such as via DCI scheduling transmission of the one or more uplink signals.
[0094] The network node 210 or the UE 220 (such as by using the processing system 245 or the processing system 240, respectively, and / or one or more coupled modems) may perform signal processing on the information (such as filtering, amplification, modulation, digital-to-analog conversion, an IFFT operation, multiplexing, interleaving, mapping, and / or encoding, among other examples) to generate a processed signal in accordance with the selected MCS. In some examples, the network node 210 or the UE 220 (for example, using the processing system 245 or the processing system 240, respectively, and / or one or more coupled encoders or modems) may perform a channel coding operation or a forward error correction (FEC) operation to control errors in transmitted information. For example, the network node 210 or the UE 220 may perform an encoding operation to generate encoded information (such as by selectively introducing redundancy into the information, typically using an error correction code (ECC) , such as a polar code or a low-density parity-check (LDPC) code) . The network node 210 or the UE 220 (for example, using the processing system 245 and / or one or more modems) may further perform spatial processing (for example, precoding) on the encoded information to generate one or more processed or precoded signals for downlink or uplink transmission, respectively. In some examples, the network node 210 or the UE 220 may perform codebook-based precoding or non-codebook-based precoding. Codebook-based precoding may involve selecting a precoder (for example, a precoding matrix) using a codebook. For example, the network node 210 may provide precoding information indicating which precoder, defined by the codebook, is to be used by the UE 220. Non-codebook-based precoding may involve selecting or deriving a precoder based on, or otherwise associated with, one or more downlink or uplink signal measurements. The network node 210 or the UE 220 may transmit the processed downlink or uplink signals, respectively, via one or more antennas.
[0095] The network node 210 or the UE 220 may receive uplink signals or downlink signals, respectively, via one or more antennas. The network node 210 or the UE 220 (for example, using the processing system 245 or the processing system 240, respectively, and / or one or more coupled modems) may perform signal processing (for example, in accordance with the MCS) on the received uplink or downlink signals, respectively (such as filtering, amplification, demodulation, analog-to-digital conversion, an FFT operation, demultiplexing, deinterleaving, de-mapping, equalization, interference cancellation, and / or decoding, among other examples) , to map the received signal (s) to a sequence of binary bits (for example, received information) that estimates the information transmitted by the network node 210 or the UE 220 via the downlink or uplink signals. The network node 210 or the UE 220 (for example, using the processing system 245 or the processing system 240, respectively, and / or a coupled decoder or one or more modems) may decode the received information (such as by using an ECC, a decoding operation, and / or an FEC operation) to detect errors and / or correct bit errors in the received information to generate decoded information. The decoded information may estimate the information transmitted via the downlink or uplink signals.
[0096] In some examples, a UE 220 and a network node 210 may perform MIMO communication. “MIMO” generally refers to transmitting or receiving multiple signals (such as multiple layers or multiple data streams) simultaneously over the same time and frequency resources. MIMO techniques generally exploit multipath propagation. A network node 210 and / or UE 220 may communicate using massive MIMO, multi-user MIMO, or single-user MIMO, which may involve rapid switching between beams or cells. For example, the amplitudes and / or phases of signals transmitted via antenna elements and / or sub-elements may be modulated and shifted relative to each other (such as by manipulating a phase shift, a phase offset, and / or an amplitude) to generate one or more beams, which is referred to as beamforming. For example, the network node 210b may generate one or more beams 260a, and the UE 220b may generate one or more beams 260b. The term “beam” may refer to a directional transmission of a wireless signal toward a receiving device or otherwise in a desired direction, a directional reception of a wireless signal from a transmitting device or otherwise in a desired direction, a direction associated with a directional transmission or directional reception, a set of directional resources associated with a signal transmission or signal reception (for example, an angle of arrival, a horizontal direction, and / or a vertical direction) , a set of parameters that indicate one or more aspects of a directional signal, a direction associated with the signal, and / or a set of directional resources associated with the signal, among other examples.
[0097] MIMO may be implemented using various spatial processing or spatial multiplexing operations. In some examples, MIMO may include a massive MIMO technique which may be associated with an increased (for example, “massive” ) quantity of antennas at the network node 210 and / or at the UE 220, such as in a network implementing mmWave technology. Massive MIMO may improve communication reliability by enabling a network node 210 and / or a UE 220 to communicate the same data across different propagation (or spatial) paths. In some examples, MIMO may support simultaneous transmission to multiple receivers, referred to as multi-user MIMO (MU-MIMO) . Some RATs may employ MIMO techniques, such as multi-TRP (mTRP) operation (including redundant transmission or reception on multiple TRPs) , reciprocity in the time domain or the frequency domain, single-frequency-network (SFN) transmission, or non-coherent joint transmission (NC-JT) .
[0098] To support MIMO techniques, the network node 210 and the UE 220 may perform one or more beam management operations, such as an initial beam acquisition operation, one or more beam refinement operations, and / or a beam recovery operation. For example, an initial beam acquisition operation may involve the network node 210 transmitting signals (for example, SSBs, CSI-RSs, or other signals) via respective beams (for example, of the beams 260a of the network node 210) and the UE 220 receiving and measuring the signal (s) via respective beams of multiple beams (for example, from the beams 260b of the UE 220) to identify a best beam (or beam pair) for communication between the UE 220 and the network node 210. For example, the UE 220 may transmit an indication (for example, in a message associated with a random access channel (RACH) operation) of a (best) identified beam of the network node 210 (for example, by indicating an SSBRI or other identifier associated with the beam) . A beam refinement operation may involve a first device (for example, the UE 220 or the network node 210) transmitting signal (s) via a subset of beams (for example, identified based on, or otherwise associated with, measurements reported as part of one or more other beam management operations) . A second device (for example, the network node 210 or the UE 220) may receive the signal (s) via a single beam (for example, to identify the best beam for communication from the subset of beams) . The beam (s) may be identified via one or more spatial parameters, such as a transmission configuration indicator (TCI) state and / or a quasi co-location (QCL) parameter, among other examples. The network node 210 and the UE 220 may increase reliability and / or achieve efficiencies in throughput, signal strength, and / or other signal properties for massive MIMO operations by performing the beam management operations.
[0099] Some aspects and techniques as described herein may be implemented, at least in part, using an artificial intelligence (AI) program (for example, referred to herein as an “AI / ML model” ) , such as a program that includes a machine learning (ML) model and / or an artificial neural network (ANN) model. The AI / ML model may be deployed at one or more devices 265 (for example, one or more network nodes 210, one or more UEs 220, and / or one or more servers, and / or one or more components of a cloud computing network, among other examples) . For example, in an deployment where AI / ML functionality is performed independently at a device 265, sometimes referred to as “overlay AI / ML” , the AI / ML model (or an instance or portion of the AI / ML model) may be deployed at a UE 220 (for example, at the processing system 240) , a network node 210 (for example, at the processing system 245) , one or more servers, and / or one or more components of a cloud computing network, among other examples. Additionally or alternatively, in a deployment where AI / ML functionality is coordinated between different devices 265, sometimes referred to as “coordinated AI / ML” , or performed at all device and network layers, sometimes referred to as “native AI / ML” , the AI / ML model (or an instance of the AI / ML model) may be deployed at multiple devices 265 (for example, a first portion of the AI / ML model may be deployed at a UE 220 and a second portion of the AI / ML model may be deployed at a network node 210) . In other examples of coordinated AI / ML and / or native AI / ML, a first AI / ML model may be deployed at a UE 220 and a second AI / ML model may be deployed at a network node 210. The AI / ML model (s) may be configured to enhance various aspects of the wireless communication network 200 (for example, to increase privacy, reliability, and / or efficient use of network bandwidth, and / or to reduce latency, among other examples) . For example, the AI / ML model (s) may be trained to identify patterns or relationships in data corresponding to the wireless communication network 200, a device, and / or an air interface, among other examples. The AI / ML model (s) may support operational decisions relating to one or more aspects associated with wireless communications devices, networks, or services.
[0100] Accordingly, in some examples, the AI / ML model (s) may enable AI-as-a-Service (for example, an end-to-end AI / ML service via a user plane) for use cases such as a self-organizing network (SON) , minimization of drive test (MDT) , quality of experience (QoE) , positioning, sensing, predictive mobility, and / or traffic prediction, among other examples. In some examples, AI-as-a-Service use cases may include measurement collection reporting by a UE 220, device selection criteria (for example, according to a geographical area where measurements are to be collected and / or UE capabilities to be used to collected measurements) , and / or reporting configurations (for example, reporting parameters such as location, time, and / or sensor information, among other examples) . Additionally or alternatively, the AI / ML model (s) may enable AI / ML procedures (for example, RAN-triggered service establishment, configuration, inferencing using UE-side and / or network-side models, performance monitoring and / or management, and / or capability signaling, among other examples) . Additionally or alternatively, the AI / ML model (s) may enable RAN-based AI / ML services via one or more application program interfaces (APIs) and / or management interfaces for use cases such as beam management, radio resource monitoring (RRM) relaxation, mobility prediction, load prediction, network energy savings, and / or coverage and capacity improvements, among other examples) .
[0101] In some aspects, a network entity (e.g., the UE 220) may include a communication manager 250. As described in more detail elsewhere herein, the communication manager 250 may receive an indication of a first measurement threshold; receive one or more SSBs; and / or transmit a random access channel communication that has a type from multiple types, wherein the type is selected based on the first measurement threshold and measurement information associated with the one or more SSBs. Additionally, or alternatively, the communication manager 250 may perform one or more other operations described herein.
[0102] In some aspects, a network entity (e.g., the network node 210) may include a communication manager 255. As described in more detail elsewhere herein, the communication manager 255 may transmit an indication of a first measurement threshold that is associated with type selection for random access channel communication from multiple types; and / or receive a random access channel communication that has a type from the multiple types. Additionally, or alternatively, the communication manager 255 may perform one or more other operations described herein.
[0103] Fig. 3 is a diagram illustrating an example disaggregated network node architecture 300, in accordance with the present disclosure. One or more components of the example disaggregated network node architecture 300 may be, may include, or may be included in one or more network nodes (such one or more network nodes 210) . The disaggregated network node architecture 300 may include a CU 310 that can communicate directly with a core network 320 via a backhaul link, or that can communicate indirectly with the core network 320 via one or more disaggregated control units, such as a non-real-time (Non-RT) RAN intelligent controller (RIC) 350 associated with a Service Management and Orchestration (SMO) Framework 360 and / or a near-real-time (Near-RT) RIC 370 (for example, via an E2 link) . The CU 310 may communicate with one or more DUs 330 via respective midhaul links, such as via F1 interfaces. Each of the DUs 330 may communicate with one or more RUs 340 via respective fronthaul links. Each of the RUs 340 may communicate with one or more UEs 220 via respective RF access links. In some deployments, a UE 220 may be simultaneously served by multiple RUs 340.
[0104] Each of the components of the disaggregated network node architecture 300, including the CUs 310, the DUs 330, the RUs 340, the Near-RT RICs 370, the Non-RT RICs 350, and the SMO Framework 360, may include one or more interfaces or may be coupled with one or more interfaces for receiving or transmitting signals, such as data or information, via a wired or wireless transmission medium.
[0105] In some aspects, the CU 310 may be logically split into one or more CU user plane (CU-UP) units and one or more CU control plane (CU-CP) units. A CU-UP unit may communicate bidirectionally with a CU-CP unit via an interface, such as the E1 interface when implemented in an O-RAN configuration. The CU 310 may be deployed to communicate with one or more DUs 330, as necessary, for network control and signaling. Each DU 330 may correspond to a logical unit that includes one or more base station functions to control the operation of one or more RUs 340. For example, a DU 330 may host various layers, such as an RLC layer, a MAC layer, or one or more PHY layers, such as one or more high PHY layers or one or more low PHY layers. Each layer (which also may be referred to as a module) may be implemented with an interface for communicating signals with other layers (and modules) hosted by the DU 330, or for communicating signals with the control functions hosted by the CU 310. Each RU 340 may implement lower layer functionality. In some aspects, real-time and non-real-time aspects of control and user plane communication with the RU (s) 340 may be controlled by the corresponding DU 330.
[0106] The SMO Framework 360 may support RAN deployment and provisioning of non-virtualized and virtualized network elements. For non-virtualized network elements, the SMO Framework 360 may support the deployment of dedicated physical resources for RAN coverage requirements, which may be managed via an operations and maintenance interface, such as an O1 interface. For virtualized network elements, the SMO Framework 360 may interact with a cloud computing platform (such as an open cloud (O-Cloud) platform 390) to perform network element life cycle management (such as to instantiate virtualized network elements) via a cloud computing platform interface, such as an O2 interface. A virtualized network element may include, but is not limited to, a CU 310, a DU 330, an RU 340, a non-RT RIC 350, and / or a Near-RT RIC 370. In some aspects, the SMO Framework 360 may communicate with a hardware aspect of a 4G RAN, a 5G NR RAN, and / or a 6G RAN, such as an open eNB (O-eNB) 380, via an O1 interface. Additionally or alternatively, the SMO Framework 360 may communicate directly with each of one or more RUs 340 via a respective O1 interface. In some deployments, this configuration can enable each DU 330 and the CU 310 to be implemented in a cloud-based RAN architecture, such as a vRAN architecture.
[0107] The Non-RT RIC 350 may include or may implement a logical function that enables non-real-time control and optimization of RAN elements and resources, AI / ML workflows including model training and updates, and / or policy-based guidance of applications and / or features in the Near-RT RIC 370. The Non-RT RIC 350 may be coupled to or may communicate with (such as via an A1 interface) the Near-RT RIC 370. The Near-RT RIC 370 may include or may implement a logical function that enables near-real-time control and optimization of RAN elements and resources via data collection and actions via an interface (such as via an E2 interface) connecting one or more CUs 310, one or more DUs 330, and / or an O-eNB 380 with the Near-RT RIC 370.
[0108] In some aspects, to generate AI / ML models to be deployed in the Near-RT RIC 370, the Non-RT RIC 350 may receive parameters or external enrichment information from external servers. Such information may be utilized by the Near-RT RIC 370 and may be received at the SMO Framework 360 or the Non-RT RIC 350 from non-network data sources or from network functions. In some examples, the Non-RT RIC 350 or the Near-RT RIC 370 may tune RAN behavior or performance. For example, the Non-RT RIC 350 may monitor long-term trends and patterns for performance and may employ AI / ML models to perform corrective actions via the SMO Framework 360 (such as reconfiguration via an O1 interface) or via creation of RAN management policies (such as A1 interface policies) .
[0109] The network entity 102, the processing system 110 of the network entity 102, the network entity 106, the processing system 112 of the network entity 106, the network node 210, the processing system 245 of the network node 210, the UE 220, the processing system 240 of the UE 220, the CU 310, the DU 330, the RU 340, or any other component (s) of Figs. 1-3 may implement one or more techniques or perform one or more operations associated with random access channel communication types, as described in more detail elsewhere herein. For example, the processing system 110 of the network entity 102, the processing system 112 of the network entity 106, the processing system 245 of the network node 210, the processing system 240 of the UE 220, the CU 310, the DU 330, or the RU 340 may perform or direct operations of, for example, process 1500 of Fig. 15, process 1600 of Fig. 16, or other processes as described herein (alone or in conjunction with one or more other processors) . Memory of the network node 210 may store data and program code (or instructions) for the network node 210, the CU 310, the DU 330, or the RU 340. In some examples, the memory of the network node 210 may store data relating to a UE 220, such as RRC state information or a UE context. Memory of a UE 220 may store data and program code (or instructions) for the UE 220, such as context information. In some examples, the memory of the UE 220 or the memory of the network node 210 may include a non-transitory computer-readable medium storing a set of instructions for wireless communication. For example, the set of instructions, when executed by one or more processors (for example, of the processing system 110, the processing system 112, the processing system 245, or the processing system 240) of the network entity 102, the network entity 106, the network node 210, the UE 220, the CU 310, the DU 330, or the RU 340, may cause the one or more processors to perform process 1500 of Fig. 15, process 1600 of Fig. 16, or other processes as described herein. In some examples, executing instructions may include running the instructions, converting the instructions, compiling the instructions, and / or interpreting the instructions, among other examples.
[0110] In some aspects, a network entity includes means for receiving an indication of a first measurement threshold; means for receiving one or more SSBs; and / or means for transmitting a random access channel communication that has a type from multiple types, wherein the type is selected based on the first measurement threshold and measurement information associated with the one or more SSBs. In some aspects, the means for the first network entity to perform operations described herein may include, for example, one or more of communication manager 250, processing system 240, processing system 110, communication manager 114, communication interface 116, processing system 112, communication manager 118, communication interface 120, a radio, one or more RF chains, one or more transceivers, one or more antennas, one or more modems, a reception component (for example, reception component 1702 depicted and described in connection with Fig. 17) and / or a transmission component (for example, transmission component 1704 depicted and described in connection with Fig. 17) , among other examples.
[0111] In some aspects, a network entity includes means for transmitting an indication of a first measurement threshold that is associated with type selection for random access channel communication from multiple types; and / or means for receiving a random access channel communication that has a type from the multiple types. In some aspects, the means for the first network entity to perform operations described herein may include, for example, one or more of communication manager 255, processing system 245, processing system 110, communication manager 114, communication interface 116, processing system 112, communication manager 118, communication interface 120, a radio, one or more RF chains, one or more transceivers, one or more antennas, one or more modems, a reception component (for example, reception component 1802 depicted and described in connection with Fig. 18) , and / or a transmission component (for example, transmission component 1804 depicted and described in connection with Fig. 18) , among other examples..
[0112] Fig. 4 is a diagram illustrating an example 400 of a random access procedure, in accordance with the present disclosure. As shown in Fig. 4, a network node 210 and a UE 220 may communicate with one another to perform a two-step random access procedure or a four-step random access procedure. The UE 220 may support a connected communication mode (e.g., an RRC connected mode) , an idle communication mode (e.g., an RRC idle mode) , and an inactive communication mode (e.g., an RRC inactive mode) . The RRC inactive mode may functionally reside between the RRC active mode and the RRC idle mode.
[0113] The UE 220 may transition between different modes based on various commands and / or communications received from the network node 210. In some aspects, as shown by reference number 405, the network node 210 may transmit, and the UE 220 may receive, an RRC release message (e.g., RRCRelease) . For example, the UE 220 may be operating in the connected communication mode associated with an active connection with the network node 210. In some examples, the RRC release message may include a suspension message (e.g., SuspendConfig) that suspends a configuration of the UE 220. In some aspects, as shown by reference number 410, in association with receiving the RRC release message, the UE 220 may enter an inactive mode (e.g., RRC_INACTIVE mode) . For example, the UE 220 may transition from RRC active mode to RRC inactive mode based at least in part on receiving an RRC release message including a suspension message (e.g., SuspendConfig) .
[0114] When transitioning to RRC inactive mode, the UE 220 and / or the network node 210 may store a UE context (e.g., an access stratum (AS) context and / or higher-layer configurations) . This permits the UE 220 and / or the network node 210 to apply the stored UE context when the UE 220 transitions from RRC inactive mode to RRC active mode in order to resume communications, which reduces latency of transitioning to RRC active mode relative to transitioning to the RRC active mode from RRC idle mode. In some other examples, the UE 220 may not receive the RRC release message and / or may not perform an RRC state transition prior to performing the random access procedure. For example, the UE 220 may perform the random access procedure for initial access (e.g., after the UE 220 is powered on) .
[0115] As shown by reference number 415, the network node 210 may transmit, and the UE 220 may receive, one or more SSBs and / or random access configuration information. In some aspects, the random access configuration information may be transmitted in and / or indicated by system information (e.g., in one or more system information blocks (SIBs) ) and / or an SSB, such as for contention-based random access. Additionally, or alternatively, the random access configuration information may be transmitted in an RRC message and / or a PDCCH order message that triggers a RACH procedure, such as for contention-free random access. The random access configuration information may include one or more parameters to be used in the two-step random access procedure and / or the four-step random access procedure, such as one or more parameters for transmitting a random access message (RAM) and / or receiving an RAR to the RAM. In some examples, the UE 220 may measure a reference signal received power (RSRP) of the one or more SSBs described in connection with reference number 415.
[0116] As shown by reference number 420, in the example of a two-step random access procedure, the UE 220 may transmit, and the network node 210 may receive, a RAM preamble. As shown by reference number 425, in the example of a two-step random access procedure, the UE 220 may transmit, and the network node 210 may receive, a RAM payload. As shown, the UE 220 may transmit the RAM preamble and the RAM payload to the network node 210 as part of an initial (or first) step of the two-step random access procedure. In some aspects, the RAM may be referred to as message A, msgA, a first message, or an initial message in a two-step random access procedure. Furthermore, in some aspects, the RAM preamble may be referred to as a message A preamble, a msgA preamble, a preamble, or a PRACH preamble, and the RAM payload may be referred to as a message A payload, a msgA payload, or a payload. In some aspects, the RAM may include some or all of the contents of message 1 (msg1) and message 3 (msg3) of a four-step random access procedure, which is described in more detail below. For example, the RAM preamble may include some or all contents of message 1 (e.g., a PRACH preamble) , and the RAM payload may include some or all contents of message 3 (e.g., a UE identifier, UCI, and / or a PUSCH) transmission.
[0117] As shown by reference number 420 and / or reference number 425, in the example of a four-step random access procedure, the UE 220 may transmit a RAM, which may include a preamble (sometimes referred to as a random access preamble, a PRACH preamble, or a RAM preamble) . The message that includes the preamble may be referred to as a message 1, msg1, MSG1, a first message, or an initial message in a four-step random access procedure. The random access message may include a random access preamble identifier.
[0118] As shown by reference number 420, in the example of a two-step random access procedure and / or reference number 425, in the example of a four-step random access procedure, the UE 220 may transmit an RRC connection request message. The RRC connection request message may be referred to as message 3, msg3, MSG3, or a third message of a four-step random access procedure. In some aspects, the RRC connection request (e.g., an RRC connection request, an RRC resume request) may include a UE identifier, UCI, and / or a PUSCH communication.
[0119] As shown by reference number 430, in the example of a two-step random access procedure, the network node 210 may receive the RAM preamble transmitted by the UE 220. If the network node 210 successfully receives and decodes the RAM preamble, the network node 210 may then receive and decode the RAM payload.
[0120] As shown by reference number 435, in the example of a two-step random access procedure, the network node 210 may transmit an RAR (sometimes referred to as an RAR message) . As shown, the network node 210 may transmit the RAR message as part of a second step of the two-step random access procedure. In some aspects, the RAR message may be referred to as message B, msgB, or a second message in a two-step random access procedure. The RAR message may include some or all of the contents of message 2 (msg2) and message 4 (msg4) of the four-step random access procedure. For example, the RAR message may include the detected PRACH preamble identifier, the detected UE identifier, a timing advance value, and / or contention resolution information.
[0121] As shown by reference number 440, in the example of a two-step random access procedure, as part of the second step of the two-step random access procedure, the network node 210 may transmit a PDCCH communication for the RAR. The PDCCH communication may schedule a PDSCH communication that includes the RAR. For example, the PDCCH communication may indicate a resource allocation (e.g., in DCI) for the PDSCH communication.
[0122] As shown by reference number 440 and / or reference number 445, in the example of a four-step random access procedure, the network node 210 may transmit an RAR as a reply to the preamble. The message that includes the RAR may be referred to as message 2, msg2, MSG2, or a second message in a four-step random access procedure. In some aspects, the RAR may indicate the detected random access preamble identifier (e.g., received from the UE 220 in msg1) . Additionally, or alternatively, the RAR may indicate a resource allocation to be used by the UE 220 to transmit message 3 (msg3) .
[0123] In some aspects, as part of the second step of the four-step random access procedure, the network node 210 may transmit a PDCCH communication for the RAR. The PDCCH communication may schedule a PDSCH communication that includes the RAR. For example, the PDCCH communication may indicate a resource allocation for the PDSCH communication. Also as part of the second step of the four-step random access procedure, the network node 210 may transmit the PDSCH communication for the RAR, as scheduled by the PDCCH communication. The RAR may be included in a MAC protocol data unit (PDU) of the PDSCH communication.
[0124] As shown by reference number 445, in the example of a two-step random access procedure, as part of the second step of the two-step random access procedure, the network node 210 may transmit the PDSCH communication for the RAR, as scheduled by the PDCCH communication. The RAR may be included in a MAC PDU of the PDSCH communication. As shown by reference number 440, if the UE 220 successfully receives the RAR, the UE 220 may transmit a hybrid automatic repeat request (HARQ) ACK.
[0125] As shown by reference number 440 and / or 445, in the example of a four-step random access procedure, the network node 210 may transmit an RRC connection setup message. The RRC connection setup message may be referred to as message 4, msg4, MSG4, or a fourth message of a four-step random access procedure.
[0126] As shown by reference number 450, the UE 220 may transmit, and the network node 210 may receive, uplink data based on establishing the RRC connection as part of the random access procedure. As shown by reference number 455, the network node 210 may transmit, and the UE 220 may receive, downlink data based on establishing the RRC connection as part of the random access procedure.
[0127] In some examples, the UE 220 may transmit repetitions of a random access communication, such as a RAM, an RRC connection request message (e.g., a message 3) , and / or another random access communication. To enhance uplink coverage and address issues associated with weak signal conditions, the UE 220 may transmit repetitions of one or more random access messages during a RACH procedure. As used herein, “repetition” may refer to an initial transmission of a message and also to a repeated transmission of the message. Thus, each transmission (regardless of whether the transmission is an initial transmission or a retransmission) may be referred to as a repetition. For example, the UE 220 may transmit multiple instances of a random access message (e.g., of a PRACH preamble) in one or more time intervals. This repetition increases the likelihood that at least one transmission of the random access message will be successfully received by the network node, thereby improving the robustness and / or reliability of the random access message. The network node may combine multiple transmissions (e.g., repetitions) of the random access message to improve the reliability of the random access message, such as for a UE 220 located at an edge of a cell coverage area associated with the network node 210.
[0128] To enable repetitions of a random access message (e.g., to enable the network node to reliably identify and / or combine repetitions of a random access message) , RACH occasions (ROs) may be organized into RO groups. As used herein, “occasion” refers to one or more resources (e.g., time domain resources, frequency domain resources, spatial domain resources, code domain resources, and / or other resources) that are available for, or configured for, the communication (e.g., the transmission and / or the reception) of a communication or message (e.g., an RO may be one or more resources available for, or configured for, the communication of a random access message) . An RO group may include multiple ROs. “RO group” may be used interchangeably herein with “set of ROs” . The configuration or organization of RO groups may enable the network node to identify and / or combine repetitions of a random access message. For example, if the UE 220 is configured to transmit repetitions of a random access message, then the UE 220 may transmit the repetitions during respective ROs included in a given RO group. This enables the network node 210 to identify the ROs in which the repetitions of the random access message are to be transmitted. This organization enables the network node 210 to correctly and / or reliably detect, identify, and / or combine the multiple repetitions of the random access message for efficient signal processing and accurate detection.
[0129] As indicated above, Fig. 4 is provided as an example. Other examples may differ from what is described with regard to Fig. 4.
[0130] Fig. 5 is a diagram illustrating an example 500 of RACH occasion groups, in accordance with the present disclosure.
[0131] As shown in Fig. 5, multiple RO groups may be defined in a frequency domain and in a time domain. An RO group may be associated with a periodic pattern. The RO group may include a first starting RO. The RO group may be a set of valid ROs, or PRACH occasions, that are consecutive in time and use the same frequency resources. The RO group is associated with the same one or more SSB indexes where each SSB index is associated with same preamble index in all valid ROs within the RO group. As shown in Fig. 5, a quantity of repetitions for a random access (RA) message (e.g., as indicated by an parameter) is four PRACH repetitions, and three SSBs (e.g., SSB#0, SSB#1, and SSB#2) may be configured (e.g., by ssb-PositionsInBurst) . The number of FDMed ROs is 4 (e.g., as indicated by Msg1-FDM) and each RO is mapped to one SSB (e.g., as indicated by SSB-per-RO) . For other numbers of repetitions (e.g., two, eight, or another number) , each RO group may include a different number of ROs.
[0132] For example, as shown in Fig. 5, a network node may configure ROs to be associated with respective time domain occasions 505 (shown in Fig. 5 as time domain occasions 505a, 505b, 505c, 505d, 505e, 505f, 505g, and 505h) and frequency domain occasions. The SSBs (e.g., SSB#0, SSB#1 and SSB#2) provided by ssb-PositionsInBurst are mapped to valid ROs based on a fixed order. To determine the RO groups, a time period 520 is defined. and then one or more RO groups 510 may be formed within the time period. An RO group may also be referred to as a set of valid ROs. When a UE transmits repetitions of an RA message, such as a Msg1, the UE may transmit the repetitions via respective ROs included in a given RO group 510. This enables the network node to identify the ROs in which repetitions of a given RA message are to be transmitted by the UE, thereby enabling the network node to efficiently and accurately identify or combine the repetitions of the RA message for improved performance of the RA message.
[0133] In some examples, the UE may determine the RO groups 510 based on configuration information received from the network node. For example, ROs may be mapped consecutively per corresponding SSB index. The UE may determine the SSB-RO mapping based on identifying valid ROs. The UE may determine whether an RO is valid. For example, from a physical layer perspective at a UE, a four-step RACH procedure, also known as a Type-1 random access procedure, includes transmission of a random access preamble (Msg1) in a valid RO (sometimes called a PRACH occasion) , reception of a random access response (RAR) message with a PDCCH / PDSCH (Msg2) , and when applicable, transmission of a PUSCH scheduled by an uplink grant in the RAR (Msg3) and reception of a PDSCH for contention resolution (Msg4) . Additionally, or alternatively, in a two-step RACH procedure, also known as a Type-2 random access procedure, a UE transmits a random access preamble in a valid RO and transmits a PUSCH payload (collectively referred to as MsgA) and the UE then receives a RAR message with a PDCCH / PDSCH (MsgB) . Furthermore, when applicable, the UE transmits a PUSCH scheduled by a fallback uplink grant in the RAR and receives a PDSCH for contention resolution. In either case, when a RACH procedure is triggered (e.g., by higher layers at the UE and / or by a PDCCH order message received from a network node) , the UE may determine an RO (e.g., corresponding to time and frequency resources for a PRACH transmission) in which to transmit the random access preamble, also known as a PRACH, according to an SSB-RO mapping.
[0134] For example, prior to initiation of a RACH procedure or transmission of a PRACH, a network node may provide a UE with random access configuration information that indicates PRACH transmission parameters (e.g., a PRACH preamble format, time / frequency resources for PRACH transmission, a preamble index, and / or a preamble SCS, among other examples) . Furthermore, the UE may receive an indication of one or more SSB indexes in an ssb-PositionsInBurst parameter (e.g., indicated in a SIB type 1 (SIB1) and / or a ServingCellConfigCommon parameter) that are mapped to valid ROs. For example, the SSB indexes indicated in the ssb-PositionsInBurst parameter are mapped to valid ROs in an increasing order of preamble indexes within a single RO, then in an increasing order of frequency resource indexes for frequency multiplexed ROs, then in an increasing order of time resource indexes for time multiplexed ROs within a PRACH slot, and then in an increasing order of indexes for PRACH slots. In this way, when a PRACH transmission is triggered at the UE, the UE may transmit a PRACH preamble in a valid RO that is mapped to an SSB index (e.g., an SSB index indicated in a PDCCH order triggering the PRACH transmission or an SSB index selected by the UE) . Accordingly, because the UE transmits the PRACH preamble in a valid RO that is mapped to or otherwise associated with an SSB index, the UE may apply one or more validation rules to determine whether an RO is valid or invalid. For example, in paired spectrum or a supplementary uplink band, all ROs are valid. However, for unpaired spectrum (e.g., a TDD band) , an RO must satisfy one or more validation rules to be considered valid.
[0135] For example, the validation rules that are applied to determine whether an RO is valid or invalid may depend on whether a UE has been provided with a parameter that indicates an uplink and downlink TDD configuration, or TDD pattern. For example, the uplink and downlink TDD configuration may be indicated in a tdd-UL-DL-ConfigurationCommon parameter, and may include a periodicity of a TDD pattern, a number of consecutive full downlink slots that begin each TDD pattern, a number of consecutive downlink symbols in the beginning of a slot that follows a last full downlink slot, a number of consecutive full uplink slots that end each TDD pattern, and a number of consecutive uplink symbols in the end of a slot that precedes a first full uplink slot. Accordingly, as described herein, the UE may apply a first set of validation rules to determine whether an RO is valid in cases where the uplink and downlink TDD configuration has not been provided, and may apply a second set of validation rules to determine whether an RO is valid in cases where the uplink and downlink TDD configuration has been provided.
[0136] For example, if the UE has not been provided with an uplink and downlink TDD configuration, an RO in a PRACH slot is valid if the RO does not precede an SSB in the PRACH slot and starts at least Ngap symbols after a last SSB reception symbol, where Ngap may have a value that depends on a preamble SCS (e.g., Ngap may have a value of 0 for a preamble SCS of 1.25 kilohertz (kHz) or 5 kHz, 2 for a preamble SCS of 15 kHz, 30 kHz, 60 kHz, or 120 kHz, 8 for a preamble SCS of 480 kHz, or 16 for a preamble SCS of 960 kHz) . Furthermore, in cases where a semi-static channel access mode is configured, a valid RO cannot overlap with a set of consecutive symbols before the start of a next channel occupancy time where the UE does not transmit. Otherwise, an RO that fails to satisfy the applicable validation rules is considered invalid for SSB-RO mapping purposes and for PRACH transmission. For example, an RO may be invalid because the RO precedes an SSB in the PRACH slot. Furthermore, an RO may be invalid because the RO is fewer than Ngap symbols after a last SSB reception symbol. On the other hand, an RO that does not precede an SSB in a PRACH slot and is at least Ngap symbols after a last SSB reception symbol is considered valid.
[0137] Additionally, or alternatively, if the UE has been provided with an uplink and downlink TDD configuration, an RO is valid if the RO is within uplink symbols. For example, an RO may be valid because the RO is within uplink symbols. Alternatively, if an RO is not within uplink symbols (e.g., is within downlink or flexible symbols) , then the RO is valid only if the RO does not precede an SSB in a PRACH slot and starts at least Ngap symbols after a last downlink symbol and least Ngap symbols after a last SSB symbol, where Ngap may have a value that depends on a preamble SCS. Furthermore, in cases where a semi-static channel access mode is configured, a valid RO cannot overlap with a set of consecutive symbols before the start of a next channel occupancy time where no transmissions are permitted. Otherwise, an RO that fails to satisfy the applicable validation rules is considered invalid for SSB-RO mapping purposes and for PRACH transmission. For example, an RO may be invalid because the RO precedes an SSB in the PRACH slot. Furthermore, an RO may be invalid because the RO is fewer than Ngap symbols after a last downlink symbol and fewer than Ngap symbols after a last SSB symbol. On the other hand, an RO that does not precede an SSB in a PRACH slot and is at least Ngap symbols after a last downlink symbol and a last SSB reception symbol is considered valid.
[0138] The indexing of the PRACH occasion indicated by a mask index value may be reset per mapping cycle of consecutive PRACH occasions per SSB index. The UE may select, for a transmission of an RA message (e.g., a PRACH transmission) , an RO indicated by a PRACH mask index value for the indicated SSB index in the first available mapping cycle. For a given preamble index, the ordering of ROs may be: first, in increasing order of frequency resource indexes for frequency multiplexed ROs; second, in increasing order of time resource indexes for time multiplexed ROs within a PRACH time interval (e.g., a PRACH slot) ; and third, in increasing order of indexes for PRACH slot.
[0139] For a PRACH transmission with preamble repetitions, a set consists of valid ROs that are consecutive in time, use same frequency resources, and are associated with same one or more SSB index (es) . For example, if the parameter indicates four repetitions, then the set of valid ROs may include four ROs. Each SSB index may associated with same preamble indexes in all valid ROs within the set. The set of valid ROs may form an RO group 510.
[0140] For a transmission of an RA message (e.g., a PRACH transmission) with preamble repetitions, a time period 520, starting from a frame 0, may be the smallest integer number of association pattern periods 515 such that at least one set of valid PRACH occasions for each of the SSB indexes can be determined within the time period for all configured number of preamble repetitions. An association period may be an amount of time in which each SSB index can be mapped to at least one value RO. An association pattern period 515 may be an amount of time that includes one or more association periods and is determined so that a pattern between ROs and SSB indexes repeats (e.g., at most every 160 milliseconds) . The set (s) of valid PRACH occasions for each configured number of preamble repetitions may repeat every time period.
[0141] Within a time period 520, for set (s) of valid ROs for a PRACH transmission with preamble repetitions (e.g., for a given RO group 510) , the first valid RO of the first set may be the first valid RO within the time period 520. The time period 520 may include one or more association pattern periods 515. The first valid RO of subsequent sets, if any, may be determined according to an ordering of valid ROs: first, in increasing order of frequency resource indexes for frequency multiplexed ROs; second, in increasing order of time resource indexes for time multiplexed ROs. For each frequency resource index for frequency multiplexed ROs, the first valid RO of the first set is the first valid RO, and the first valid PRACH occasion of subsequent sets, if any, is: after a number of consecutive valid ROs (e.g., indicated by a msg1-RepetitionTimeOffsetROGroup parameter) in time from the first valid RO of the previous set, where each RO is associated with same SSB index (es) and SSB index is associated with same preambles, if the msg1-RepetitionTimeOffsetROGroup parameter is provided; or is after the ROs for the previous set, if the msg1-RepetitionTimeOffsetROGroup parameter is not provided.
[0142] In some examples, the UE may determine whether repetitions of a RA message are to be transmitted and / or a quantity of repetitions to be transmitted based on measurement information. For example, the UE may receive a random access configuration indicating that a BWP is configured with one or more first sets of random access resources with a configuration parameter (e.g., a msg1-Repetitions parameter) that indicates the one or more first sets of random access resources are configured for repetitions (e.g., with the msg1-Repetitions parameter set to true) and one or more second sets of random access resources without the configuration parameter that indicates the one or more second sets of random access resources are not configured for repetitions (e.g., without the msg1-Repetitions parameter set to true) . In some examples, the one or more first sets of random access resources may be configured for different quantities of repetitions, such as eight repetitions, four repetitions, or two repetitions, among other examples.
[0143] In such examples, the UE may compare a measurement value (e.g., an RSRP value) of a downlink pathloss reference signal (e.g., one or more SSBs) to one or more repetition thresholds to determine whether repetitions of a RA message are to be transmitted and / or a quantity of repetitions to be transmitted based on measurement information. For example, the one or more repetition thresholds may be associated with respective quantities of repetitions (e.g., a rsrpThresholdMsg1-RepetitionNum8 threshold for eight repetitions, a rsrpThresholdMsg1-RepetitionNum4 threshold for four repetitions, or a rsrpThresholdMsg1-RepetitionNum2 threshold for two repetitions) . If the UE is configured with random access resources associated with eight repetitions, and an RSRP of the downlink pathloss reference signal is less than the rsrpThresholdMsg1-RepetitionNum8 threshold for eight repetitions, then the UE may determine that the RA message (e.g., a Msg1) is to be transmitted with eight repetitions. If the UE is configured with random access resources associated with four repetitions, and the RSRP of the downlink pathloss reference signal is less than the rsrpThresholdMsg1-RepetitionNum4 threshold for four repetitions, then the UE may determine that the RA message (e.g., a Msg1) is to be transmitted with four repetitions. If the UE is configured with random access resources associated with two repetitions, and the RSRP of the downlink pathloss reference signal is less than the rsrpThresholdMsg1-RepetitionNum2 threshold for two repetitions, then the UE may determine that the RA message (e.g., a Msg1) is to be transmitted with two repetitions. Otherwise, if the RSRP of the downlink pathloss reference signal is not less than any repetition thresholds, then the UE may determine that the RA message (e.g., a Msg1) is to be transmitted without repetitions. In other examples, such as when the one or more second sets of random access resources are not configured with the BWP, if the RSRP of the downlink pathloss reference signal is not less than any repetition thresholds, then the UE may determine that the RA message (e.g., a Msg1) is to be transmitted with a configured quantity of repetitions (e.g., a lowest quantity of repetitions configured for the BWP) .
[0144] As indicated above, Fig. 5 is provided as an example. Other examples may differ from what is described with respect to Fig. 5.
[0145] Fig. 6 is a diagram illustrating an example logical architecture of a distributed RAN 600, in accordance with the present disclosure.
[0146] An access node 605 may include an access node controller 610. The access node controller 610 may be a CU of the distributed RAN 600. In some aspects, a backhaul interface to a core network 615 may terminate at the access node controller 610. The core network 615 may include a control plane component 620 and a user plane component 625 (e.g., a 5G gateway) , and the backhaul interface for one or both of the control plane and the user plane may terminate at the access node controller 610. Additionally, or alternatively, a backhaul interface to one or more neighbor access nodes 630 (e.g., another access node 605, a 6G access node, and / or an LTE access node) may terminate at the access node controller 610.
[0147] The access node controller 610 may include and / or may communicate with one or more TRPs 635 (e.g., via an F1 Control (F1-C) interface and / or an F1 User (F1-U) interface) . A TRP 635 may include a distributed unit (DU) and / or a radio unit (RU) of the distributed RAN 600. In some aspects, a TRP 635 may correspond to a network node 210 described above in connection with Fig. 2. For example, different TRPs 635 may be included in different network nodes 210. Additionally, or alternatively, multiple TRPs 635 may be included in a single network node 210. In some aspects, a network node 210 may include a CU (e.g., access node controller 610) and / or one or more DUs (e.g., one or more TRPs 635) . In some cases, a TRP 635 may be referred to as a cell, a panel, an antenna array, or an array.
[0148] A TRP 635 may be connected to a single access node controller 610 or to multiple access node controllers 610. In some aspects, a dynamic configuration of split logical functions may be present within the architecture of distributed RAN 600, referred to elsewhere herein as a functional split. For example, a PDCP layer, an RLC layer, and / or a MAC layer may be configured to terminate at the access node controller 610 or at a TRP 635.
[0149] In some aspects, multiple TRPs 635 may transmit communications (e.g., the same communication or different communications) in the same transmission time interval (TTI) (e.g., a slot, a mini-slot, a subframe, or a symbol) or different TTIs using different QCL relationships (e.g., different spatial parameters, different TCI states, different precoding parameters, and / or different beamforming parameters) . In some aspects, a TCI state may be used to indicate one or more QCL relationships. A TRP 635 may be configured to individually (e.g., using dynamic selection) or jointly (e.g., using joint transmission with one or more other TRPs 635) serve traffic to a UE 220.
[0150] As indicated above, Fig. 6 is provided as an example. Other examples may differ from what was described with regard to Fig. 6.
[0151] Fig. 7 is a diagram illustrating an example 700 of multi-TRP communication, in accordance with the present disclosure. Multi-TRP communication may sometimes be referred to as multi-panel communication. As shown in Fig. 7, multiple TRPs 705 may communicate with the same UE 220. A TRP 705 may correspond to a TRP 635 described above in connection with Fig. 6.
[0152] The multiple TRPs 705 (shown as TRP A and TRP B) may communicate with the same UE 220 in a coordinated manner (e.g., using coordinated multipoint transmissions) to improve reliability and / or increase throughput. The TRPs 705 may coordinate such communications via an interface between the TRPs 705 (e.g., a backhaul interface and / or an access node controller 610) . The interface may have a smaller delay and / or higher capacity when the TRPs 705 are co-located at the same network node 210 (e.g., when the TRPs 705 are different antenna arrays or panels of the same network node 210) , and may have a larger delay and / or lower capacity (as compared to co-location) when the TRPs 705 are located at different network nodes 210. The different TRPs 705 may communicate with the UE 220 using different QCL relationships (e.g., different TCI states) , different demodulation reference signal (DMRS) ports, and / or different layers (e.g., of a multi-layer communication) .
[0153] In a first multi-TRP transmission mode (e.g., Mode 1) , a single physical downlink control channel (PDCCH) may be used to schedule downlink data communications for a single physical downlink shared channel (PDSCH) . In this case, multiple TRPs 705 (e.g., TRP A and TRP B) may transmit communications to the UE 220 on the same PDSCH. For example, a communication may be transmitted using a single codeword with different spatial layers for different TRPs 705 (e.g., where one codeword maps to a first set of layers transmitted by a first TRP 705 and maps to a second set of layers transmitted by a second TRP 705) . As another example, a communication may be transmitted using multiple codewords, where different codewords are transmitted by different TRPs 705 (e.g., using different sets of layers) . In either case, different TRPs 705 may use different QCL relationships (e.g., different TCI states) for different DMRS ports corresponding to different layers. For example, a first TRP 705 may use a first QCL relationship or a first TCI state for a first set of DMRS ports corresponding to a first set of layers, and a second TRP 705 may use a second (different) QCL relationship or a second (different) TCI state for a second (different) set of DMRS ports corresponding to a second (different) set of layers. In some aspects, a TCI state in downlink control information (DCI) (e.g., transmitted on the PDCCH, such as DCI format 1_0 or DCI format 1_1) may indicate the first QCL relationship (e.g., by indicating a first TCI state) and the second QCL relationship (e.g., by indicating a second TCI state) . The first and the second TCI states may be indicated using a TCI field in the DCI. In general, the TCI field can indicate a single TCI state (for single-TRP transmission) or multiple TCI states (for multi-TRP transmission as discussed here) in this multi-TRP transmission mode (e.g., Mode 1) .
[0154] In a second multi-TRP transmission mode (e.g., Mode 2) , multiple PDCCHs may be used to schedule downlink data communications for multiple corresponding PDSCHs (e.g., one PDCCH for each PDSCH) . In this case, a first PDCCH may schedule a first codeword to be transmitted by a first TRP 705, and a second PDCCH may schedule a second codeword to be transmitted by a second TRP 705. Furthermore, first DCI (e.g., transmitted by the first TRP 705) may schedule a first PDSCH communication associated with a first set of DMRS ports with a first QCL relationship (e.g., indicated by a first TCI state) for the first TRP 705, and second DCI (e.g., transmitted by the second TRP 705) may schedule a second PDSCH communication associated with a second set of DMRS ports with a second QCL relationship (e.g., indicated by a second TCI state) for the second TRP 705. In this case, DCI (e.g., having DCI format 1_0 or DCI format 1_1) may indicate a corresponding TCI state for a TRP 705 corresponding to the DCI. The TCI field of a DCI indicates the corresponding TCI state (e.g., the TCI field of the first DCI indicates the first TCI state and the TCI field of the second DCI indicates the second TCI state) .
[0155] As indicated above, Fig. 7 is provided as an example. Other examples may differ from what is described with respect to Fig. 7.
[0156] Fig. 8 is a diagram illustrating a wireless communication network 800 of multi-TRP communication, in accordance with the present disclosure. As shown in Fig. 8, a network entity 805, which may be an example of a network node 210, an access node, or a TRP (e.g., an uplink and downlink TRP) , may interface with one or more TRPs 810 via a backhaul interface, as described herein. For example, the network entity 805 may coordinate with the one or more TRPs 810 to support communications with a UE 815, which may be an example of a UE 220, as described herein. The network entity 805 may be configured to support both downlink and uplink communication. For example, the network entity 805 may be configured to receive information from the UE 220 (e.g., for uplink) and transmit information to the UE 220 (e.g., for downlink) .
[0157] In some cases, one or more TRPs 810 may be an example of uplink (UL) TRPs (e.g., uplink reception points or uplink-only TRPs) . For example, the one or more TRPs 810 may support receiving information (e.g., uplink signaling) from the UE 815 without transmitting downlink signaling to the UE 815, which may be an example of asymmetrical TRP implementations. In other words, the TRPs 810 may not be configured to transmit information or signals to the UE 815. In some examples, the TRPs 810 may communicate signaling to the network entity 805 via the backhaul link, such as based on uplink signaling from the UE 815, and the network entity 805 may transmit downlink signaling to the UE 815. In such examples, the UE 815 may operate in a single-TRP manner for downlink (e.g., may receive downlink signals from the network entity 805) and may operate in a multi-TRP manner for uplink (e.g., via one or more of the TRPs 810) .
[0158] For example, the UE 815 may transmit uplink signaling to a TRP 810a, which may be an example of an uplink TRP (e.g., an uplink-only TRP) . In some examples, the UE 815 may communicate with the TRP 810a based on a proximity of the UE 815 to the TRP 810a. For example, the UE 815 may select or be configured with a TRP 810 based on a position of the UE 815, which may improve uplink coverage of a wireless communication network, such as the wireless communication network 200, and / or reduce uplink pathloss for the UE 815. The UE 815 may receive downlink signaling from the network entity 805. For example, the network entity 805 may receive an indication of the uplink signaling via the backhaul interface from the TRP 810a, and the network entity 805 may transmit downlink signaling based on the uplink signaling. Additionally, or alternatively, the network entity 805 may transmit the downlink signaling including an uplink grant for the UE 815, and the UE 815 may transmit uplink signaling to the TRP 810a based on receiving the downlink signaling from the network entity 805.
[0159] Accordingly, by implementing one or more TRPs 810 configured for uplink operation, uplink coverage for the wireless communication network may be improved by expanding a coverage area for the UE 815. Additionally, implementing the one or more TRPs 810 may improve uplink coverage without significantly increasing deployment costs or the complexity of the wireless communication network relative to increasing the quantity of network nodes 210 or TRPs 705 (e.g., TRPs or gNBs supporting both uplink and downlink) , because TRPs 810 do not transmit downlink signaling and may therefore operate with reduced processing and / or complexity.
[0160] In some examples, the TRPs 810 may be used for initial access for the UE 815 to improve uplink coverage for a random access procedure. However, because the TRPs 810 do not transmit downlink signals, the UE 815 may not receive downlink reference signals from the TRPs 810. As described elsewhere herein, the UE 815 may use information obtained from one or more downlink reference signals (e.g., measurement information of downlink pathloss reference signals) during a random access procedure, such as for random access occasion selection (e.g., SSB index selection) , spatial direction or beam determination for uplink transmission, and / or repetition determination, among other examples. Therefore, for initial access with a TRP 810, the UE 815 may transmit repetitions of one or more random access communications (e.g., repetitions of a RAM) . The UE 815 may transmit the repetitions in respective spatial directions and / or using respective beams. For example, the UE 815 may transmit different repetitions in different spatial directions and / or using different beams. For example, the UE 815 may transmit multiple random access channel repetitions using transmit beam sweeping to enable initial access with a TRP 810 (e.g., with an uplink TRP) . For example, the UE 815 may perform transmit beam sweeping because the UE 815 may not receive a downlink reference signal from the TRP 810. Therefore, the UE 815 may not obtain an indication of a location or spatial direction of the TRP 810 relative to the location of the UE 815 (e.g., the UE 815 may not know in which spatial direction the UE 815 should transmit to transmit toward the TRP 810) .
[0161] For initial access with the network entity 805, the UE 815 may receive a downlink reference signal (e.g., one or more SSBs) from the network entity 805. Therefore, the UE 815 may perform a random access procedure with the network entity 805 based on the downlink reference signal (e.g., in a similar manner as described in connection with Fig. 4) . As a result, the UE 815 may perform different types of random access for accessing the network entity 805 and a TRP 810. For example, a first type may be based on reception of a downlink reference signal (e.g., for initial access with the network entity 805) and a second type may not be based on reception of a downlink reference signal (e.g., and may include transmit beam sweeping for initial access with a TRP 810) . In some examples, it may be beneficial for the UE 815 to perform initial access using a given type. However, because the UE 815 does not receive signals from the TRPs 810 and may not have an active communication connection with the network entity 805 (e.g., to receive an indication of which type of initial access should be performed) , the UE 815 may not be able to determine which type would be beneficial in different scenarios. In some examples, the UE 815 may perform the first type to access the network entity 805 (e.g., thereby reducing uplink coverage for initial access because the UE 815 does not perform initial access with the TRPs 810) . In some other examples, the UE 815 may perform the second type to access a TRP 810 when the UE 815 is not physically near a TRP 810 (e.g., thereby consuming network resources and / or power resources associated with the multiple repetitions involved in the transmit beam sweeping for the second type) .
[0162] Additionally, for repetitions of a random access message, the UE 815 may use ROs from an RO group to enable a receiver (e.g., the network entity 805 or a TRP 810) to identify and / or combine repetitions of the random access message. As described elsewhere herein, the UE 815 may form or determine an RO group by mapping SSB indexes to respective ROs. However, the UE 815 may not receive SSBs from a TRP 810. Therefore, it is unclear as to how the UE 815 is to select ROs to transmit the repetitions of the random access message for the second type (e.g., for transmit beam sweeping for the repetitions) . As a result, a TRP 810 and the UE 815 may be misaligned as to ROs in which the repetitions of the random access message are to be transmitted. This may result in misdetection, misidentification, and / or incorrect combining of the multiple repetitions of the random access message.
[0163] As indicated above, Fig. 8 is provided as an example. Other examples may differ from what is described with respect to Fig. 8.
[0164] Fig. 9 is a diagram of an example 900 associated with random access channel communication types, in accordance with the present disclosure. As shown in Fig. 9, a first network entity 905 (e.g., the network entity 106, or the network node 210) may communicate with a second network entity 910 (e.g., the network entity 102 or the UE 220) . In some aspects, the first network entity 905 and the second network entity 910 may be part of a wireless network (e.g., the wireless communication network 200) . The second network entity 910 and the first network entity 905 may have established a wireless connection prior to operations shown in Fig. 9.
[0165] In some aspects, as shown by reference number 915, the second network entity 910 may transmit capability information. The capability information may be included in a capability report. The second network entity 910 may transmit the capability information via an uplink communication, a sidelink communication, a unicast communication, a broadcast communication, a UE assistance information (UAI) communication, an uplink control information (UCI) communication, a sidelink control information (SCI) communication, a MAC control element (MAC-CE) communication, an RRC communication, a physical uplink control channel (PUCCH) , a physical uplink shared channel (PUSCH) , a physical sidelink control channel (PSCCH) , and / or a physical sidelink shared channel (PSSCH) , among other examples. The capability information may indicate one or more parameters associated with respective capabilities of the second network entity 910. The one or more parameters may be indicated via respective information elements (IEs) included in a capability report.
[0166] The capability information may indicate whether the second network entity 910 supports a feature and / or one or more parameters related to the feature. For example, the capability information may indicate a capability and / or parameter for performing a random access procedure that is not based on SSB reception (e.g., a random access procedure associated with transmit beam sweeping) . As another example, the capability information may indicate a capability and / or parameter for mapping random access resources (e.g., PRACH resources or ROs) to RO groups or virtual SSBs (e.g., for the random access procedure that is not based on SSB reception) . One or more operations described herein may be based on capability information. For example, the second network entity 910 may perform a communication in accordance with the capability information, or may receive configuration information that is in accordance with the capability information.
[0167] In some aspects, shown by reference number 920, the first network entity 905 may transmit, and the second network entity 910 may receive, configuration information. In some aspects, the second network entity 910 may receive the configuration information via one or more of system information signaling (e.g., a master information block (MIB) and / or a system information block (SIB) , among other examples) , RRC signaling, MAC signaling (e.g., one or more MAC-CEs) , and / or physical layer signaling (e.g., DCI) , among other examples.
[0168] In some aspects, the configuration information may indicate one or more candidate configurations and / or communication parameters. In some aspects, the one or more candidate configurations and / or communication parameters may be selected, activated, and / or deactivated by a subsequent indication. For example, the subsequent indication may select a candidate configuration and / or communication parameter from the one or more candidate configurations and / or communication parameters. In some aspects, the subsequent indication may include a dynamic indication, such as one or more MAC-CEs and / or one or more DCI messages, among other examples.
[0169] In some aspects, the configuration information may include an indication of a selection of one or more configuration parameters (e.g., a selection of the one or more configuration parameters already known to the second network entity 910 and / or previously indicated by the network node or other network device) , and / or explicit configuration information for the second network entity 910 to use to configure the second network entity 910, among other examples.
[0170] In some examples, the configuration information may not be expressly signaled to the second network entity 910. For example, in some aspects, the configuration information may at least partially be defined by a wireless communication standard, such as the 3GPP. In such examples, the first network entity 905 may not explicitly indicate such configuration information to the second network entity 910. For example, the second network entity 910 may optionally obtain at least a portion of the configuration information from a configuration stored by the second network entity 910 (e.g., an original equipment manufacturer (OEM) configuration) . In some aspects, the configuration information may include a parameter or index that is indicative of information defined, or otherwise fixed, by a wireless communication standard, such as the 3GPP (e.g., rather than explicitly indicating the information) .
[0171] In some aspects, the configuration information may indicate that the second network entity 910 is to select between multiple types of RACH communication. In some examples, a first type of RACH communication may be based on SSB reception. For example, for the first type of RACH communication, the second network entity 910 may receive and / or measure one or more SSBs. The second network entity 910 may select an SSB index (e.g., that is associated with a highest RSRP, or an RSRP that satisfies a certain threshold) . The second network entity 910 may use the selection SSB index for RO selection and / or for determining a spatial direction (e.g., a beam) for transmission and / or reception during the RACH procedure. The first type of RACH communication may be associated with a repetition type. The repetition type may indicate whether repetitions of one or more RACH communications (e.g., a RAM, a preamble communication, a Msg1, or a Msg3) are to be transmitted by the second network entity 910. In some aspects, the first type of RACH communication may be associated with repetitions. In other aspects, the first type of RACH communication may not be associated with repetitions. In some aspects, the first type may be referred to as “Case 1” RACH communication.
[0172] In some aspects, the multiple types of RACH communication may include a second type. The second type of RACH communication may not be based on SSB reception. For example, the second type of RACH communication may be associated with initial access with an uplink TRP. For the second type of RACH communication, the second network entity 910 may transmit repetitions of a RACH communication in respective spatial directions (e.g., using different transmit beams) . For example, for the second type of RACH communication, the second network entity 910 may transmit different repetitions of a RACH communication (e.g., a RAM, a preamble communication, a Msg1, or a Msg3) in different spatial directions (e.g., using different transmit beams) . In some aspects, the second type may be referred to as “Case 2” RACH communication.
[0173] In some aspects, the configuration information may indicate that the second network entity 910 is to map random access resources (e.g., PRACH resources or ROs) to RO groups for the second type of RACH communication (e.g., rather than to SSB indexes) . As another example, the configuration information may indicate that the second network entity 910 is to map random access resources (e.g., PRACH resources or ROs) to virtual SSB indexes for the second type of RACH communication.
[0174] The configuration information may include a random access configuration (e.g., a RACH configuration) . For example, the configuration information may include an uplink BWP configuration (e.g., a BWP-UplinkCommon IE or parameter) . The uplink BWP configuration may include or indicate one or more random access configurations, such as a common RACH configuration (e.g., a rach-ConfigCommon IE or parameter) , a generic RACH configuration (e.g., a rach-ConfigGeneric IE or parameter) , and / or one or more additional RACH configurations (e.g., indicated by an AdditionalRACH-ConfigList IE or parameter) , among other examples. The common RACH configuration may indicate one or more random access parameters for a cell supported by the network node 210 (e.g., one or more cell-specific random access parameters) . The one or more additional RACH configurations may provide RACH configurations for different features or feature combinations.
[0175] In some aspects, the configuration information (e.g., the random access configuration) may indicate a threshold (e.g., referred to herein as a first measurement threshold) for selection of a type of RACH communication. The threshold may indicate a value (e.g., a measurement value, such as an RSRP value) . The threshold may be configured for use for selection between the first type (e.g., Case 1) and the second type (e.g., Case 2) of RACH communication. In some aspects, the threshold may be associated with measurement information of a pathloss reference signal. For example, the threshold may be associated with measurement information of one or more SSBs. In some aspects, the threshold may be associated with filtered measurement information that is based on measurements of multiple pathloss reference signals (e.g., multiple SSBs) . For example, the measurement information (e.g., the filtered measurement information) may indicate a value (e.g., an RSRP value) . The second network entity 910 may compare the value to the threshold to determine whether the second network entity 910 is to perform the first type or the second type of RACH communication. The threshold may be referred to as an SSB RSRP threshold (e.g., an SSB-RSRP threshold) .
[0176] In some aspects, the configuration information (e.g., the random access configuration) may indicate a threshold (e.g., a second measurement threshold) for selection of an SSB for the first type of RACH communication. For example, the second threshold may be indicated by an rsrp-ThresholdSSB parameter in the configuration information (e.g., in a rach-ConfigCommon IE) .
[0177] In some aspects, the configuration information may indicate random access resources (e.g., PRACH resources) . The random access resources may include ROs. In some aspects, the configuration information may indicate first random access resources for the first type of RACH communication (e.g., for random access with a network entity that supports downlink) . The configuration information may indicate second random access resources for the second type of RACH communication (e.g., for random access with a network entity that does not support downlink, such as an uplink TRP) . For example, the second network entity 910 may receive separate configurations of ROs for the second type of RACH communication and ROs for the first type of RACH communication. In other aspects, the second network entity 910 may receive a single configuration that indicates ROs for the second type of RACH communication and ROs for the first type of RACH communication. For example, the configuration information may indicate a random access resource pool. The random access resource pool may indicates ROs for the second type of RACH communication and ROs for the first type of RACH communication.
[0178] In some aspects, the configuration information may include configuration information for a non-repetition configuration based on the reception of the indication of the first measurement threshold. For example, the non-repetition configuration may be a configuration for the first type with a repetition type indicating that no repetitions are to be transmitted. For example, the second network entity 910 may not expect to be configured with random access resources for repetitions and the first type if the second network entity 910 is configured with random access resources for the second type (e.g., if the second network 910 is configured with the SSB-RSRP threshold for selection between the multiple types) . For example, the second network entity 910 may not expect to be configured with Case 1 with PRACH repetitions and Case 2 with multiple PRACH transmissions to one or more UL TRPs simultaneously. In other words, if the SSB-RSRP threshold for selection between the multiple types is configured for a BWP or component carrier, then the second network entity 910 may not expect to be configured with PRACH repetitions of the first type for the BWP or the component carrier. In such an example, the second network entity 910 may select between the first type (e.g., without repetitions) and the second type (e.g., with repetitions) based on the first measurement threshold (e.g., the SSB-RSRP threshold) .
[0179] In some aspects, the configuration information may indicate one or more mapping parameters for mapping ROs configured for the second type of RACH communication. For example, the one or more mapping parameters may include a transmit beam sweeping parameter, a receive beam sweeping parameter, and / or an RO group quantity parameter, among other examples. The transmit beam sweeping parameter (e.g., N) may indicate a quantity of ROs to be used for transmit beam sweeping for the second type. The receive beam sweeping parameter (e.g., R) may indicate a quantity of ROs to be used for receive beam sweeping. The RO group quantity parameter may indicate a quantity of RO groups to be formed by the second network entity 910. The RO group quantity parameter may enable the first network entity 905 to configure a quantity of RO groups to reduce the likelihood of collisions between different network entities (e.g., where a collision is associated with two network entities (e.g., two UEs) selecting the same RO (s) and / or the same preamble for transmission) . Each RO group may include N×R ROs. An RO group may also be referred to herein as a “random access channel group. ”
[0180] The second network entity 910 may configure itself based at least in part on the configuration information. In some aspects, the second network entity 910 may be configured to perform one or more operations described herein based at least in part on the configuration information.
[0181] In some aspects, as shown by reference number 925, the second network entity 910 may map ROs to RO groups or virtual SSBs for the second type of RACH communication. The mapping of ROs to RO groups may be based on the one or more mapping parameters. For example, where the configuration information indicates separate configurations for ROs for the first type and ROs for the second type, the second network entity 910 may map the ROs for the second type to the RO groups. As described above, each RO group may have N×R ROs, where N is indicated by the transmit beam sweeping parameter and R is indicated by the receive beam sweeping parameter. Additionally, the second network entity 910 may form M RO groups, where M is indicated by the RO group quantity parameter. For example, the configuration information may indicate a quantity (e.g., M) of RO groups to be formed by the second network entity 910.
[0182] In such examples, the second network entity 910 may determine valid ROs from the configured random access resources (e.g., as indicated by the configuration information) . The second network entity 910 may determine whether an RO is valid independent of SSB resource configuration (e.g., SSB symbol locations or SSB time domain locations) because the second type of RACH communication is not based on SSB reception. Additionally, the second network entity 910 may determine whether an RO is valid based on a time division duplex (TDD) configuration. For example, whether an RO is valid may be a function of the TDD configuration (e.g., indicating time domain resources configured for uplink or downlink) . For example, if an RO is configured during a downlink time interval (e.g., a downlink slot or symbol) , then the second network entity 910 may determine that the RO is invalid.
[0183] The second network entity 910 may map ROs to RO groups based on one or more mapping rules. The one or more mapping rules may indicate an order in which RO group indexes are to be mapped to ROs. For example, the one or more mapping rules may indicate that the RO group indexes are to be mapped to ROs first in order of frequency resource indexes (e.g., in order of increasing frequency resource indexes) for frequency multiplexed ROs. The one or more mapping rules may indicate that the RO group indexes are to be mapped to ROs second in order of time resource indexes (e.g., in order of increasing time resource indexes) for time multiplexed ROs within a given time interval (e.g., within a given PRACH slot) . The one or more mapping rules may indicate that the RO group indexes are to be mapped to ROs third in order of time interval indexes (e.g., in increasing order of PRACH slot indexes) .
[0184] For the RO group to RO mapping, an association period may be a smallest integer number of time domain intervals for ROs in which M RO group indexes can be mapped to at least one RO. For example, an association period, starting from a frame 0, for mapping RO group indexes to ROs is the smallest integer number in a set indicated by the PRACH configuration table (e.g., indicated by a PRACH configuration period and association period mapping) such that each of M RO group indexes is mapped at least once to an RO during the association period. If after an integer number of RO group indexes to RO mapping cycles within the association period there is a set of remaining ROs that are not mapped to M RO group indexes, no RO group indexes may be mapped to the set of remaining ROs. An association pattern period may include one or more association periods. The second network entity 910 may determine an association pattern period such that a pattern between ROs and RO group indexes repeats at most every S milliseconds (e.g., where S has a value of 160) .
[0185] In some aspects, each RO group may include one or more sets of ROs. A set of ROs may include N×R valid ROs. The N×R valid ROs may be consecutive in time and associated with the same RO group index (e.g., mapped to the same RO group index) . This ensures that transmit beam sweeping and receive beam sweeping can be performed during the time division multiplexed ROs in the set of ROs. In some aspects, the N×R valid ROs in a set of ROs may be associated with the same frequency domain resources. In some other aspects, the N×R valid ROs in a set of ROs may be associated with different frequency domain resources. In such examples, there may be a frequency offset between the different frequency domain resources. In some aspects, the configuration information may indicate the frequency offset. For example, a first one or more ROs in a set of ROs may be associated with first frequency domain resources and a second one or more ROs in the set of ROs may be associated with second frequency domain resources. A frequency gap between the first frequency domain resources and the second frequency domain resources may be at least the frequency offset. The frequency offset may be indicated in terms of a quantity of resource blocks or a quantity of ROs relative to a start of the first frequency domain resources or a start of the second frequency domain resources. In some aspects, the first one or more ROs (e.g., that are associated with the first frequency domain resources) may be consecutive in the time domain and mapped to the RO group index. The second one or more ROs (e.g., that are associated with the second frequency domain resources) may be consecutive in the time domain and mapped to the RO group index. In other examples, ROs having an even index may be associated with the first frequency domain resources and ROs having an odd index may be associated with the second frequency domain resources (e.g., as depicted in Fig. 13B) . For example, time domain ROs with even indexes in the set of ROs may use same frequency resources, and time domain ROs with odd indexes in the set of RO may use different frequency resources that start in a frequency resource that is the frequency offset (e.g., in terms of a quantity of RBs or ROs) relative to the start of the frequency resources corresponding to ROs with even indexes.
[0186] In some aspects, a time period, starting from a frame 0, may be defined based on a smallest integer number of association pattern periods during which at least one set of ROs for each of the M RO groups occurs. The one or more set (s) of valid ROs repeat in every time period. During a given time period, the second network entity 910 may determine a starting RO for a starting set of ROs of a given RO group. The second network entity 910 may then determine other RO (s) in the set of ROs. Next, the second network entity 910 may determine a starting RO of a next set of ROs for the given RO group and determines other ROs of the next set of ROs sequentially. The starting RO of the next set of ROs may be the next valid RO within the time period (e.g., first in increased order of frequency resource indexes, and second in increasing order of time resource indexes) . In some other aspects, the first valid RO within the time period may be based on a time offset. In some aspects, the configuration information may indicate the time offset. The time offset may indicate a minimum amount of time between starting ROs of consecutive sets of ROs for the same frequency resource index. For example, the time offset may indicate a minimum amount of time between a starting RO of a set (F) and a starting RO of a set (F-1) . If the configuration information includes the time offset, then the second network entity 910 may determine starting ROs for respective sets of ROs in the same frequency resource index using the time offset. If the configuration information does not include the time offset, then the second network entity 910 may determine starting ROs for respective sets of ROs without using the time offset.
[0187] In some other aspects, where the configuration information indicates a single configuration for ROs for the first type and ROs for the second type, the second network entity 910 may map the ROs for the second type to virtual SSBs. In such examples, a set of ROs may include N×R valid ROs that are consecutive in time, use the same frequency resources, and are associated with the same one or more virtual SSB index (es) . Each SSB index may be associated with the same preamble indexes in all valid ROs within the set of ROs. In such examples, the time period for determining sets of ROs may be defined as the smallest integer number of association pattern periods in which at least one set of valid ROs for each of the SSB indexes corresponding to the virtual SSBs can be determined. The ROs may be mapped to SSB indexes of virtual SSBs in a similar manner as described in connection with Fig. 5.
[0188] As shown by reference number 930, the first network entity 905 may transmit, and the second network entity 910 may receive, one or more reference signals. The one or more reference signals may be downlink reference signals. In some aspects, the one or more reference signals may be pathloss reference signals. For example, the one or more reference signals may be SSBs or another type of reference signal.
[0189] The second network entity 910 may measure the one or more reference signals to obtain measurement information. In some aspects, the measurement information may be filtered measurement information that is based on measurements of multiple reference signals (e.g., multiple SSBs) . Filtered measurement information may provide improved insight into channel conditions over time (e.g., as the filtered measurement information may take previous measurements into account) . The measurement information may indicate a value (e.g., a measurement value) . For example, the value may be an RSRP value. In some aspects, the value may be a filtered value (e.g., a filtered RSRP value) .
[0190] As shown by reference number 935, the second network entity 910 may determine a type of random access (e.g., a type of RACH communication) to be performed. The second network entity 910 may determine the type based on the measurement information (e.g., the filtered measurement information) and the first measurement threshold (e.g., the SSB-RSRP threshold configured for selection of random access type) . For example, if the value (e.g., indicated by the measurement information) satisfies the first measurement threshold, then the second network entity 910 may determine that the first type of random access is to be performed (e.g., where the first type is based on SSB reception) . If the value (e.g., indicated by the measurement information) does not satisfy the first measurement threshold, then the second network entity 910 may determine that the second type of random access is to be performed (e.g., where the second type is not based on SSB reception, is for uplink TRPs, and / or includes transmit beam sweeping) .
[0191] In some aspects, the second network entity 910 may first determine a repetition type to be applied for the first type of random access (e.g., where the first type is based on SSB reception) . For example, the second network entity 910 may determine whether the first type is to be associated with repetitions. The second network entity 910 may determine whether the first type is to be associated with repetitions based on the measurement information and one or more repetition thresholds (e.g., that are configured via the configuration information) . For example, the one or more repetition thresholds may be associated with respective quantities of repetitions (e.g., an rsrpThresholdMsg1-RepetitionNum8 threshold for eight repetitions, an rsrpThresholdMsg1-RepetitionNum4 threshold for four repetitions, or an rsrpThresholdMsg1-RepetitionNum2 threshold for two repetitions) . If the second network entity 910 is configured with random access resources associated with eight repetitions, and the value indicated by the measurement information is less than the rsrpThresholdMsg1-RepetitionNum8 threshold for eight repetitions, then the second network entity 910 may determine that the repetition type is to be associated with eight repetitions. If the second network entity 910 is configured with random access resources associated with four repetitions, and the value indicated by the measurement information is less than the rsrpThresholdMsg1-RepetitionNum4 threshold for four repetitions, then the second network entity 910 may determine that the repetition type is to be associated with four repetitions. If the second network entity 910 is configured with random access resources associated with two repetitions, and the value indicated by the measurement information is less than the rsrpThresholdMsg1-RepetitionNum2 threshold for two repetitions, then the second network entity 910 may determine that the repetition type is to be associated with two repetitions. Otherwise, if the value indicated by the measurement information is not less than any repetition threshold, then the second network entity 910 may determine that the repetition type is to be no repetitions.
[0192] Next (e.g., after determining the repetition type of the first type) , the second network entity 910 may determine whether the first type (e.g., with the determined repetition type) or the second type of random access is to be performed by the second network entity 910 (e.g., based on the measurement information and the first measurement threshold, as described elsewhere herein) .
[0193] In some other aspects, the second network entity 910 may first determine whether the first type or the second type of random access is to be performed by the second network entity 910 (e.g., based on the measurement information and the first measurement threshold, as described elsewhere herein) . Next, if the second network entity 910 determines that the first type of random access is to be performed, then the second network entity 910 may determine the repetition type associated with the first type (e.g., in a similar manner as described above) .
[0194] In some aspects, as shown by reference number 940, the second network entity 910 may select a reference signal index for the first type of random access. For example, if the second network entity 910 determines that the first type of random access is to be performed (e.g., the first type that is based on SSB reception) , then the second network entity 910 may select a reference signal index (e.g., an SSB index) based on second measurement information and a second measurement threshold (e.g., a threshold configured for SSB selection) . The second measurement information may indicate values for respective reference signals (e.g., respective SSBs) , such as the reference signals received by the second network entity 910 as described in connection with reference number 930. In some aspects, the first measurement information may be filtered measurement information and the second measurement information may be unfiltered measurement information. The second measurement threshold may be indicated by an rsrp-ThresholdSSB parameter. For example, if at least one value of a given SSB satisfies the second measurement threshold, then the second network entity 910 may select an SSB from the SSB (s) associated with the at least one value. If no values indicated by the second measurement information satisfy the second measurement threshold, then the second network entity 910 may select any SSB from SSBs received by the second network entity 910. The second network entity 910 may use the selected SSB index for RO determination, as described in more detail elsewhere herein.
[0195] In some aspects, as shown by reference number 945, the second network entity 910 may select an RO group if repetitions are to be transmitted. For example, if the second network entity 910 determines that the second type of random access is to be performed, then the second network entity 910 may select an RO group. As described elsewhere herein, RO groups may be mapped to ROs by the second network entity 910. The second network entity 910 may randomly select an RO group from the M RO groups formed by the second network entity 910 (e.g., as described in connection with reference number 925) . The second network entity 910 may select a preamble from a set of preambles associated with the RO group. For example, the second network entity 910 may randomly select a preamble from the set of preambles associated with the RO group.
[0196] The second network entity 910 may select a set of ROs from one or more sets of ROs associated with the RO group. For example, as described in connection with reference number 925, the second network entity 910 may determine one or more sets of ROs for the RO group within a given time period. The second network entity 910 may randomly select a set of ROs from the one or more sets of ROs. The second network entity 910 may use the ROs included in the set of ROs to transmit respective repetitions of a RACH communication, such as a Msg1 or a RAM. For example, the repetitions may each indicate the selected preamble.
[0197] In some aspects, if the second network entity 910 determines that the second type of random access is to be performed, then the second network entity 910 may select a virtual SSB index. As described elsewhere herein, virtual SSB indexes may be mapped to ROs by the second network entity 910. The second network entity 910 may randomly select an SSB index from an SSB group associated with virtual SSBs. For example, the second network entity 910 may select an SSB group associated with the second type. The SSB group may be associated with (e.g., may include) one or more virtual SSBs. The second network entity 910 may select a preamble from a set of preambles associated with the virtual SSB index. For example, the second network entity 910 may randomly select a preamble from the set of preambles associated with the virtual SSB index. The second network entity 910 may select a set of ROs from one or more sets of ROs associated with the virtual SSB index. For example, as described in connection with reference number 925, the second network entity 910 may determine one or more sets of ROs for the virtual SSB index within a given time period. The second network entity 910 may randomly select a set of ROs from the one or more sets of ROs. The second network entity 910 may use the ROs included in the set of ROs to transmit respective repetitions of a RACH communication, such as a Msg1 or a RAM. For example, the repetitions may each indicate the selected preamble.
[0198] As shown by reference number 950, the second network entity 910 may transmit a random access communication having the type determined as described in connection with reference number 935. In some aspects, the second network entity 910 may transmit, and the first network entity 905 (e.g., an uplink and downlink network entity) may receive, the random access communication. For example, if the second network entity 910 determines that the first type of random access is to be performed, then the second network entity 910 may transmit, and the first network entity 905 may receive, the random access communication. In some aspects, if the second network entity 910 determines that the first type of random access is to be performed, then the second network entity 910 may transmit the random access communication without repetitions (e.g., may transmit a single instance of the random access communication) . In other examples, if the second network entity 910 determines that the first type of random access is to be performed, then the second network entity 910 may transmit the random access communication with two or more repetitions.
[0199] In some other aspects, if the second network entity 910 determines that the second type of random access is to be performed, then the second network entity 910 may transmit, and a third network entity (e.g., an uplink TRP not shown in Fig. 9) may receive, the random access communication. If the second type of random access is to be performed, then the second network entity 910 may transmit repetitions of the random access communication (e.g., using respective ROs in the selected set of ROs for a given RO group or virtual SSB) in respective spatial directions (e.g., using respective transmit beams) .
[0200] As indicated above, Fig. 9 is provided as an example. Other examples may differ from what is described with respect to Fig. 9.
[0201] Fig. 10 is a diagram of an example 1000 associated with random access channel communication types, in accordance with the present disclosure. The example 1000 may depict operations performed by a network entity (e.g., the second network entity 910 or a UE) to determine a type of random access to be performed. For example, the network entity may determine the type from a first type (e.g., that is based on SSB reception) and a second type (e.g., that is not based on SSB reception and / or that includes transmit beam sweeping) .
[0202] The network entity may obtain first measurement information (block 1005) . For example, the first measurement information may indicate a value for a pathloss reference signal (e.g., for one or more SSBs) . The value may be a filtered value (e.g., the first measurement information may be filtered measurement information) that is based on multiple measurements. The network entity may determine whether a first threshold is satisfied based on the first measurement information (block 1010) . The first threshold may be the first measurement threshold described elsewhere herein. For example, the first threshold may be configured for selection of the type of random access to be performed by the network entity.
[0203] If the first threshold is satisfied (block 1010 –Yes) , then the network entity may perform the first type of random access (block 1015) . For example, the first threshold being satisfied may be indicative of relatively good channel conditions between the network entity and another network entity (e.g., the network entity 905 or a network node 210) that transmits the pathloss reference signal (s) (e.g., the SSBs) . Therefore, if the first threshold is satisfied based on the first measurement information (e.g., if a value indicated by the first measurement information satisfies the first threshold) , then the network entity may perform a random access procedure with the other network entity. This may conserve resources that would have otherwise been associated with the network entity transmitting repetitions of transmit beam sweeping associated with the second type of random access when the channel conditions between the network entity and the other network entity are relatively good.
[0204] The network entity may obtain second measurement information (block 1020) . The second measurement information may indicate values for respective reference signal indexes (e.g., for respective SSB indexes) . For example, the second measurement information may be unfiltered measurement information. In some aspects, the first measurement information and the second measurement information may be based on measurements of one or more of the same reference signals.
[0205] The network entity may determine whether a second threshold is satisfied based on the second measurement information (block 1025) . For example, the network entity may determine whether at least one value indicated by the second measurement information satisfies the second threshold. The second threshold may be the second measurement threshold described elsewhere herein. The second threshold may be configured for SSB selection. For example, the second measurement threshold may be indicated by an rsrp-ThresholdSSB parameter. If the second threshold is satisfied (block 1025 –Yes) , then the network entity may select an SSB from the one or more SSBs associated with respective values that satisfy the second threshold (block 1030) . If the second threshold is not satisfied (block 1025 –No) , then the network entity may select any SSB (block 1035) . For example, the network entity may select an SSB index from SSBs received by the network entity and / or measured to obtain the second measurement information.
[0206] If the first threshold is not satisfied (block 1010 –No) , then the network entity may perform the second type of random access (block 1040) . For example, if the value indicated by the first measurement information does not satisfy the first threshold, then the network entity may perform the second type of random access that is not based on SSB reception and / or that involves transmit beam sweeping (e.g., for initial access with an uplink TRP) . For example, the value indicated by the first measurement information not satisfying the first threshold may be indicative of relatively poor channel conditions between the network entity and another network entity (e.g., the network entity 905 or a network node 210) that transmits the pathloss reference signal (s) (e.g., the SSBs) . Therefore, the network entity may perform the second type of random access to attempt to access an uplink TRP (e.g., rather than performing initial access with the other network entity) . This may conserve resources and / or improve the likelihood of successful random access.
[0207] As indicated above, Fig. 10 is provided as an example. Other examples may differ from what is described with respect to Fig. 10.
[0208] Fig. 11 is a diagram of an example 1100 associated with thresholds for selection of a random access channel communication type, in accordance with the present disclosure. As shown in Fig. 11, a network entity may be configured with multiple thresholds for random access. The multiple thresholds may include a first threshold 1105 configured for selection of a random access type. The first threshold 1105 may be the first measurement threshold described elsewhere herein, such as in connection with block 1010. For example, the first threshold 1105 may be an SSB-RSRP threshold. The first threshold 1105 may indicate a value (e.g., a measurement value, such as an RSRP value) .
[0209] The network entity may be configured with one or more repetition thresholds, such as a first repetition threshold 1110 (e.g., an rsrpThresholdMsg1-RepetitionNum2 threshold for two repetitions) , a second repetition threshold 1115 (e.g., an rsrpThresholdMsg1-RepetitionNum4 threshold for four repetitions) , and / or a third repetition threshold 1120 (e.g., an rsrpThresholdMsg1-RepetitionNum8 threshold for eight repetitions) , among other examples. The one or more repetition thresholds may be used by the network entity to determine if repetitions are to be transmitted and / or a quantity of repetitions to transmit for a first type of random access (e.g., that is based on SSB reception) .
[0210] As shown in Fig. 11, if a value indicated by measurement information does not satisfy (e.g., is less than) the first threshold 1105, then the network entity may perform the second type of random access. If the value indicated by measurement information satisfies (e.g., is greater than) the first threshold 1105, then the network entity may perform the first type of random access. If the first type of random access is performed, the network entity may use the one or more repetition thresholds to determine if repetitions are to be transmitted and / or a quantity of repetitions to be transmitted. For example, if the value satisfies the first threshold 1105 and the second repetition threshold 1115, but does not satisfy the first repetition threshold 1110, then the network entity may perform the first type of random access with two repetitions. As another example, if the value satisfies the first repetition threshold 1110, then the network entity may perform the first type of random access without repetition.
[0211] The relative values of the different thresholds indicated in Fig. 11 are provided as an example. A network entity (e.g., a network node 210) may configure the values for respective thresholds. For example, in other aspects a value of the first threshold 1105 may be less than the value of the second repetition 1115. In some other examples, a value of the first threshold 1105 may be greater than the value of the first repetition threshold 1110.
[0212] As indicated above, Fig. 11 is provided as an example. Other examples may differ from what is described with respect to Fig. 11.
[0213] Fig. 12 is a diagram of an example 1200 associated with random access channel communication types, in accordance with the present disclosure. The example 1200 may include operations performed by a network entity (e.g., the second network entity 910 or a UE) to determine a type of random access to be performed. For example, the network entity may determine the type from a first type (e.g., that is based on SSB reception) and a second type (e.g., that is not based on SSB reception and / or that includes transmit beam sweeping) .
[0214] The network entity may obtain first measurement information (block 1205) . For example, the first measurement information may indicate a value for a pathloss reference signal (e.g., for one or more SSBs) . The value may be a filtered value (e.g., the first measurement information may be filtered measurement information) that is based on multiple measurements. The network entity may determine whether a first threshold is satisfied based on the first measurement information (block 1210) . The first threshold may be the first measurement threshold described elsewhere herein. For example, the first threshold may be configured for selection of the type of random access to be performed by the network entity.
[0215] If the first threshold is satisfied (block 1210 –Yes) , then the network entity may perform the first type of random access (block 1215) . For example, the first threshold being satisfied may be indicative of relatively good channel conditions between the network entity and another network entity (e.g., the network entity 905 or a network node 210) that transmits the pathloss reference signal (s) (e.g., the SSBs) . Therefore, if the first threshold is satisfied based on the first measurement information (e.g., if a value indicated by the first measurement information satisfies the first threshold) , then the network entity may perform a random access procedure with the other network entity. This may conserve resources that would have otherwise been associated with the network entity transmitting repetitions of transmit beam sweeping associated with the second type of random access when the channel conditions between the network entity and the other network entity are relatively good.
[0216] If the first threshold is not satisfied (block 1210 –No) , then the network entity may perform the second type of random access (block 1220) . For example, if the value indicated by the first measurement information does not satisfy the first threshold, then the network entity may perform the second type of random access that is not based on SSB reception and / or that involves transmit beam sweeping (e.g., for initial access with an uplink TRP) . For example, the value indicated by the first measurement information not satisfying the first threshold may be indicative of relatively poor channel conditions between the network entity and another network entity (e.g., the network entity 905 or a network node 210) that transmits the pathloss reference signal (s) (e.g., the SSBs) . Therefore, the network entity may perform the second type of random access to attempt to access an uplink TRP (e.g., rather than performing initial access with the other network entity) . This may conserve resources and / or improve the likelihood of successful random access.
[0217] In such examples, the network entity may select an RO group from M RO groups or may select a virtual SSB (block 1225) . For example, ROs may be mapped to RO groups or virtual SSBs for the second type of random access. The network entity may randomly select an RO group or a virtual SSB for performing the second type of random access. The network entity may select a preamble from a set of preambles associated with the RO group or the virtual SSB (block 1230) . For example, the network entity may randomly select the preamble (e.g., a random access preamble) from the set of preambles.
[0218] The network entity may select a set of ROs from sets of ROs associated with the RO group or the virtual SSB (block 1235) . For example, for a given time period, the RO group or the virtual SSB may be associated with one or more sets of ROs. The network entity may randomly select a set of ROs from the one or more sets of ROs. The network entity may transmit repetitions of a random access communication using respective ROs from the set of ROs (block 1240) . For example, the network entity may perform transmit beam sweeping by transmitting repetitions in respective spatial directions (e.g., using respective transmit beams) .
[0219] As indicated above, Fig. 12 is provided as an example. Other examples may differ from what is described with respect to Fig. 12.
[0220] Figs. 13A and 13B are diagrams of an example 1300 associated with random access resource mapping for a random access channel communication type, in accordance with the present disclosure.
[0221] The example 1300 is an example in which ROs are mapped to RO groups. In the example 1300, there may be four RO groups (e.g., M = 4) , shown as RO group 0, RO group 1, RO group 2, and RO group 3. A transmit beam sweeping parameter may indicate that 4 ROs are to be used for transmit beam sweeping (e.g., N = 4) and a receive beam sweeping parameter may indicate that 2 ROs are to be used for receive beam sweeping (e.g., R = 2) . Therefore, there may be 8 ROs included in each RO group. As shown in Figs. 13A and 13B, an RO group (e.g., the RO group 0) may be associated with one or more sets 1305 of ROs within a time period 1310.
[0222] The second network entity 910 may map ROs to RO groups based on one or more mapping rules. The one or more mapping rules may indicate an order in which RO group indexes are to be mapped to ROs. For example, the one or more mapping rules may indicate that the RO group indexes are to be mapped to ROs first in order of frequency resource indexes (e.g., in order of increasing frequency resource indexes) for frequency multiplexed ROs. The one or more mapping rules may indicate that the RO group indexes are to be mapped to ROs second in order of time resource indexes (e.g., in order of increasing time resource indexes) for time multiplexed ROs within a given time interval (e.g., within a given PRACH slot) . The one or more mapping rules may indicate that the RO group indexes are to be mapped to ROs third in order of time interval indexes (e.g., in increasing order of PRACH slot indexes) .
[0223] For the RO group to RO mapping, an association period may be a smallest integer number of time intervals in which M RO group indexes can be mapped to at least one RO. For example, an association period, starting from a frame 0, for mapping RO group indexes to ROs is the smallest integer number in a set indicated by the PRACH configuration table (e.g., indicated by a PRACH configuration period and association period mapping) such that each of M RO group indexes is mapped at least once to an RO during the association period. If after an integer number of RO group indexes to RO mapping cycles within the association period there is a set of remaining ROs that are not mapped to M RO group indexes, no RO group indexes may be mapped to the set of remaining ROs. An association pattern period may include one or more association periods. The second network entity 910 may determine an association pattern period such that a pattern between ROs and RO group indexes repeats at most every S milliseconds (e.g., where S has a value of 160) .
[0224] In some aspects, each RO group may include one or more sets 1305 of ROs. A set 1305 of ROs may include N×R valid ROs. The N×R valid ROs may be consecutive in time and associated with the same RO group index (e.g., mapped to the same RO group index) . This ensures that transmit beam sweeping and receive beam sweeping can be performed during the time division multiplexed ROs in the set of ROs. In some aspects, as shown in Fig. 13A, the N×R valid ROs in a set 1305 of ROs may be associated with the same frequency domain resources. In some other aspects, as shown in Fig. 13B, the N×R valid ROs in a set 1305 of ROs may be associated with different frequency domain resources. There may be a frequency offset 1320 between the different frequency domain resources. In some aspects, the configuration information may indicate the frequency offset 1320. For example, a first one or more ROs in a set 1305 of ROs may be associated with first frequency domain resources and a second one or more ROs in the set 1305 of ROs may be associated with second frequency domain resources. A frequency gap between the first frequency domain resources and the second frequency domain resources may be at least the frequency offset 1320. The frequency offset may be indicated in terms of a quantity of resource blocks or a quantity of ROs relative to a start of the first frequency domain resources or a start of the second frequency domain resources. In some aspects, the first one or more ROs (e.g., that are associated with the first frequency domain resources) may be consecutive in the time domain and mapped to the RO group index. The second one or more ROs (e.g., that are associated with the second frequency domain resources) may be consecutive in the time domain and mapped to the RO group index. In other examples and as shown in Fig. 13B, ROs having an even index may be associated with the first frequency domain resources and ROs having an odd index may be associated with the second frequency domain resources. For example, time domain ROs with even indexes in the set of ROs may use same frequency resources, and time domain ROs with odd indexes in the set of RO may use different frequency resources that start in a frequency resource that is the frequency offset (e.g., in terms of a quantity of RBs or ROs) relative to the start of the frequency resources corresponding to ROs with even indexes.
[0225] In some aspects, the time period 1310, starting from a frame 0, may be defined based on a smallest integer number of association pattern periods 1315 during which at least one set of ROs for each of the M RO groups occurs. The one or more sets 1305 of valid ROs repeat in every time period 1310. For example, as shown in Figs. 13A and 13B, three association pattern periods 1315 are needed to form a set 1305 of eight valid ROs for each RO group. Therefore, the time period 1310 may be based on a duration of three association pattern periods 1315.
[0226] As indicated above, Figs. 13A and 13B are provided as examples. Other examples may differ from what is described with respect to Figs. 13A and 13B.
[0227] Fig. 14 is a diagram of an example 1400 associated with random access resource mapping for a random access channel communication type, in accordance with the present disclosure. The example 1400 is associated with mapping random access resources (e.g., PRACH resources or ROs) for the second type of random access (e.g., that is not based on SSB reception) to virtual SSBs.
[0228] For example, where configuration information indicates a single or shared configuration for ROs for the first type and ROs for the second type, a network entity may map ROs for the second type to virtual SSBs. In such examples, a set 1405 of ROs may include N×R valid ROs that are consecutive in time, use the same frequency resources, and are associated with the same one or more virtual SSB index (es) . Each SSB index may be associated with the same preamble indexes in all valid ROs within the set 1405 of ROs. In such examples, a time period 1410 for determining sets of ROs may be defined as the smallest integer number (e.g., three as shown in Fig. 14) of association pattern periods 1415 in which at least one set of valid ROs for each of the SSB indexes corresponding to the virtual SSBs can be determined. The ROs may be mapped to SSB indexes of virtual SSBs in a similar manner as described in connection with Fig. 5.
[0229] As indicated above, Fig. 14 is provided as an example. Other examples may differ from what is described with respect to Fig. 14.
[0230] Fig. 15 is a diagram illustrating an example process 1500 performed, for example, at a first network entity or an apparatus of a first network entity, in accordance with the present disclosure. Example process 1500 is an example where the apparatus or the first network entity (e.g., the second network entity 910, the network entity 102, the network entity 106, or a UE 220) performs operations associated with random access channel communication types.
[0231] As shown in Fig. 15, in some aspects, process 1500 may include receiving an indication of a first measurement threshold (block 1510) . For example, the first network entity (e.g., using reception component 1702 and / or communication manager 1706, depicted in Fig. 17) may receive an indication of a first measurement threshold, as described above.
[0232] As further shown in Fig. 15, in some aspects, process 1500 may include receiving one or more SSBs (block 1520) . For example, the first network entity (e.g., using reception component 1702 and / or communication manager 1706, depicted in Fig. 17) may receive one or more SSBs, as described above.
[0233] As further shown in Fig. 15, in some aspects, process 1500 may include transmitting a random access channel communication that has a type from multiple types, wherein the type is selected based on the first measurement threshold and measurement information associated with the one or more SSBs (block 1530) . For example, the first network entity (e.g., using transmission component 1704 and / or communication manager 1706, depicted in Fig. 17) may transmit a random access channel communication that has a type from multiple types, wherein the type is selected based on the first measurement threshold and measurement information associated with the one or more SSBs, as described above.
[0234] Process 1500 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in connection with one or more other processes described elsewhere herein.
[0235] In a first aspect, the measurement information indicates a value, and the type is selected based on whether the value satisfies the first measurement threshold.
[0236] In a second aspect, alone or in combination with the first aspect, the type is associated with transmission, of the random access channel communication, based on reception of the one or more SSBs, wherein, to transmit the random access channel communication, process 1500 includes transmitting the random access channel communication using spatial domain information that is based on second measurement information of an SSB of the one or more SSBs, wherein the second measurement information indicates a value that satisfies a second measurement threshold.
[0237] In a third aspect, alone or in combination with one or more of the first and second aspects, the multiple types include a first type, a second type, and a third type, wherein the first type and the second type are associated with transmission, of the random access channel communication, based on reception of the one or more SSBs, wherein the first type is not associated with repetitions of the random access channel communication, wherein the second type is associated with repetitions of the random access channel communication, wherein the third type is associated with transmission, of the random access channel communication, that is not based on reception of the one or more SSBs, and process 1500 includes selecting, from the first type and the second type, a repetition type of the random access channel communication, wherein the repetition type is based on the measurement information and one or more repetition measurement thresholds, and selecting, from the repetition type and the third type, the type based on the first measurement threshold and the measurement information.
[0238] In a fourth aspect, alone or in combination with one or more of the first through third aspects, the repetition type is the second type, and the repetition type indicates a quantity of repetitions of the random access channel communication.
[0239] In a fifth aspect, alone or in combination with one or more of the first through fourth aspects, the multiple types include a first type and a second type, wherein the first type is associated with transmission, of the random access channel communication, based on reception of the one or more SSBs, wherein the second type is associated with transmission, of the random access channel communication, that is not based on reception of the one or more SSBs, and process 1500 includes selecting, from the first type and the second type, the type based on the first measurement threshold and the measurement information.
[0240] In a sixth aspect, alone or in combination with one or more of the first through fifth aspects, the type is the first type, and a quantity of repetitions of the random access channel communications is based on the measurement information and one or more repetition measurement thresholds.
[0241] In a seventh aspect, alone or in combination with one or more of the first through sixth aspects, process 1500 includes receiving configuration information for a non-repetition configuration based on the reception of the indication of the first measurement threshold.
[0242] In an eighth aspect, alone or in combination with one or more of the first through seventh aspects, the multiple types include a first type and a second type, wherein the first type is associated with transmission, of the random access channel communication, based on reception of the one or more SSBs, wherein the first type is not associated with repetitions of random access channel communication, wherein the second type is associated with transmission, of the random access channel communication, that is not based on reception of the one or more SSBs, and wherein the second type is associated with repetitions of random access communication.
[0243] In a ninth aspect, alone or in combination with one or more of the first through eighth aspects, receiving the one or more SSB includes receiving the one or more SSBs from a second network entity.
[0244] In a tenth aspect, alone or in combination with one or more of the first through ninth aspects, the type is a first type, and transmitting the random access channel communication includes transmitting the random access channel communication to the second network entity.
[0245] In an eleventh aspect, alone or in combination with one or more of the first through tenth aspects, the type is a second type, and transmitting the random access channel communication includes transmitting the random access channel communication to a third network entity.
[0246] In a twelfth aspect, alone or in combination with one or more of the first through eleventh aspects, the type is associated with transmission, of the random access channel communication, that is not based on reception of the one or more SSBs, and transmitting the random access channel communication includes transmitting repetitions of the random access channel communication, wherein the repetitions are associated with respective spatial directions.
[0247] In a thirteenth aspect, alone or in combination with one or more of the first through twelfth aspects, the random access channel communication is associated with a set of one or more random access channel occasions from multiple sets of one or more random access channel occasions included in a random access channel group.
[0248] In a fourteenth aspect, alone or in combination with one or more of the first through thirteenth aspects, a quantity of the set of one or more random access channel occasions is based on a transmit beam sweeping parameter and a receive beam sweeping parameter.
[0249] In a fifteenth aspect, alone or in combination with one or more of the first through fourteenth aspects, process 1500 includes receiving configuration information indicating a quantity of multiple random access channel groups including the random access channel group.
[0250] In a sixteenth aspect, alone or in combination with one or more of the first through fifteenth aspects, the multiple sets of one or more random access channel occasions are a subset of random access channel occasions from all the valid random access channel occasions in a random access resource pool, and the multiple random access channel groups are mapped to all the valid random access channel occasions based on one or more mapping rules.
[0251] In a seventeenth aspect, alone or in combination with one or more of the first through sixteenth aspects, the set of one or more random access channel occasions are associated with same frequency domain resources.
[0252] In an eighteenth aspect, alone or in combination with one or more of the first through seventeenth aspects, one or more first random access channel occasions, from the set of one or more random access channel occasions, are associated with first frequency domain resources, and one or more second random access channel occasions, from the set of one or more random access channel occasions, are associated with second frequency domain resources.
[0253] In a nineteenth aspect, alone or in combination with one or more of the first through eighteenth aspects, there is a frequency offset between the first frequency domain resources and the second frequency domain resources.
[0254] In a twentieth aspect, alone or in combination with one or more of the first through nineteenth aspects, process 1500 includes receiving an indication of the frequency offset.
[0255] In a twenty-first aspect, alone or in combination with one or more of the first through twentieth aspects, the one or more first random access channel occasions occur before the one or more second random access channel occasions in a time domain.
[0256] In a twenty-second aspect, alone or in combination with one or more of the first through twenty-first aspects, the one or more first random access channel occasions are associated with even indexes, and the one or more second random access channel occasions are associated with odd indexes.
[0257] In a twenty-third aspect, alone or in combination with one or more of the first through twenty-second aspects, the multiple sets of one or more random access occasions are within a time period, wherein a starting random access channel occasion of a first set of one or more random access channel occasions, of the multiple sets of one or more random access channel occasions, is based on a first valid random access channel occasion in the time period, and wherein starting random access channel occasions of one or more other sets of one or more random access channel occasions, of the multiple sets of one or more random access channel occasions are firstly ordered in order of frequency resource index and secondly ordered in order of time resource index.
[0258] In a twenty-fourth aspect, alone or in combination with one or more of the first through twenty-third aspects, the multiple sets of one or more random access occasions are within a time period, wherein, for each frequency resource index, a first starting random access channel occasion of a first set of one or more random access channel occasions, of the multiple sets of one or more random access channel occasions, is based on a first valid random access channel occasion in the time period, first in order of frequency resource index and second in order of time resource index.
[0259] In a twenty-fifth aspect, alone or in combination with one or more of the first through twenty-fourth aspects, a second starting random access channel occasion of a second set of one or more random access channel occasions is after a time offset from the first starting random access channel occasion for a frequency resource index.
[0260] In a twenty-sixth aspect, alone or in combination with one or more of the first through twenty-fifth aspects, the random access channel group is randomly selected from multiple random access channel groups, and the set of one or more random access channel occasions is randomly selected from the multiple sets of one or more random access channel occasions.
[0261] In a twenty-seventh aspect, alone or in combination with one or more of the first through twenty-sixth aspects, the random access channel communication is associated with a set of one or more random access channel occasions from multiple sets of one or more random access channel occasions included in an SSB group, wherein the SSB group is associated with the type.
[0262] In a twenty-eighth aspect, alone or in combination with one or more of the first through twenty-seventh aspects, process 1500 includes receiving configuration information indicating a random access resource pool, wherein the random access resource pool includes the multiple sets of one or more random access channel occasions, wherein valid random access occasions in the random access resource pool are mapped to respective SSB groups of multiple SSB groups, and wherein the multiple SSB groups include the SSB group.
[0263] In a twenty-ninth aspect, alone or in combination with one or more of the first through twenty-eighth aspects, the SSB group is associated with one or more virtual SSBs.
[0264] In a thirtieth aspect, alone or in combination with one or more of the first through twenty-ninth aspects, the multiple sets of one or more random access channel occasions are mapped to SSB indexes within a time period, and the SSB indexes include one or more SSB indexes associated with respective virtual SSBs of the one or more virtual SSBs.
[0265] Although Fig. 15 shows example blocks of process 1500, in some aspects, process 1500 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Fig. 15. Additionally, or alternatively, two or more of the blocks of process 1500 may be performed in parallel.
[0266] Fig. 16 is a diagram illustrating an example process 1600 performed, for example, at a first network entity or an apparatus of a first network entity, in accordance with the present disclosure. Example process 1600 is an example where the apparatus or the first network entity (e.g., the first network entity 905, the network entity 102, the network entity 106, or the network node 210) performs operations associated with random access channel communication types.
[0267] As shown in Fig. 16, in some aspects, process 1600 may include transmitting an indication of a first measurement threshold that is associated with type selection for random access channel communication from multiple types (block 1610) . For example, the first network entity (e.g., using transmission component 1804 and / or communication manager 1806, depicted in Fig. 18) may transmit an indication of a first measurement threshold that is associated with type selection for random access channel communication from multiple types, as described above.
[0268] As further shown in Fig. 16, in some aspects, process 1600 may include receiving a random access channel communication that has a type from the multiple types (block 1620) . For example, the first network entity (e.g., using reception component 1802 and / or communication manager 1806, depicted in Fig. 18) may receive a random access channel communication that has a type from the multiple types, as described above.
[0269] Process 1600 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in connection with one or more other processes described elsewhere herein.
[0270] In a first aspect, the multiple types include a first type, a second type, and a third type, wherein the first type and the second type are associated with transmission, of the random access channel communication, based on reception of the one or more SSBs, wherein the first type is not associated with repetitions of the random access channel communication, wherein the second type is associated with repetitions of the random access channel communication, wherein the third type is associated with transmission, of the random access channel communication, that is not based on reception of the one or more SSBs.
[0271] In a second aspect, alone or in combination with the first aspect, process 1600 includes transmitting configuration information for a non-repetition configuration based on the transmission of the indication of the first measurement threshold.
[0272] In a third aspect, alone or in combination with one or more of the first and second aspects, the multiple types include a first type and a second type, wherein the first type is associated with transmission, of the random access channel communication, based on reception of the one or more SSBs, wherein the first type is not associated with repetitions of random access channel communication, wherein the second type is associated with transmission, of the random access channel communication, that is not based on reception of the one or more SSBs, and wherein the second type is associated with repetitions of random access communication.
[0273] In a fourth aspect, alone or in combination with one or more of the first through third aspects, the random access channel communication is associated with a set of one or more random access channel occasions from multiple sets of one or more random access channel occasions included in a random access channel group.
[0274] In a fifth aspect, alone or in combination with one or more of the first through fourth aspects, a quantity of the set of one or more random access channel occasions is based on a transmit beam sweeping parameter and a receive beam sweeping parameter.
[0275] In a sixth aspect, alone or in combination with one or more of the first through fifth aspects, process 1600 includes transmitting configuration information indicating a quantity of multiple random access channel groups including the random access channel group.
[0276] In a seventh aspect, alone or in combination with one or more of the first through sixth aspects, the multiple sets of one or more random access channel occasions are a subset of random access channel occasions from all the valid random access channel occasions in a random access resource pool, and the multiple random access channel groups are mapped to all the valid random access channel occasions based on one or more mapping rules.
[0277] In an eighth aspect, alone or in combination with one or more of the first through seventh aspects, the set of one or more random access channel occasions are associated with same frequency domain resources.
[0278] In a ninth aspect, alone or in combination with one or more of the first through eighth aspects, one or more first random access channel occasions, from the set of one or more random access channel occasions, are associated with first frequency domain resources, and one or more second random access channel occasions, from the set of one or more random access channel occasions, are associated with second frequency domain resources.
[0279] In a tenth aspect, alone or in combination with one or more of the first through ninth aspects, there is a frequency offset between the first frequency domain resources and the second frequency domain resources.
[0280] In an eleventh aspect, alone or in combination with one or more of the first through tenth aspects, process 1600 includes transmitting an indication of the frequency offset.
[0281] In a twelfth aspect, alone or in combination with one or more of the first through eleventh aspects, the one or more first random access channel occasions occur before the one or more second random access channel occasions in a time domain.
[0282] In a thirteenth aspect, alone or in combination with one or more of the first through twelfth aspects, the one or more first random access channel occasions are associated with even indexes, and the one or more second random access channel occasions are associated with odd indexes.
[0283] In a fourteenth aspect, alone or in combination with one or more of the first through thirteenth aspects, the multiple sets of one or more random access occasions are within a time period, wherein a starting random access channel occasion of a first set of one or more random access channel occasions, of the multiple sets of one or more random access channel occasions, is based on a first valid random access channel occasion in the time period, and starting random access channel occasions of one or more other sets of one or more random access channel occasions, of the multiple sets of one or more random access channel occasions are firstly ordered in order of frequency resource index and secondly ordered in order of time resource index.
[0284] In a fifteenth aspect, alone or in combination with one or more of the first through fourteenth aspects, the multiple sets of one or more random access occasions are within a time period, wherein, for each frequency resource index, a first starting random access channel occasion of a first set of one or more random access channel occasions, of the multiple sets of one or more random access channel occasions, is based on a first valid random access channel occasion in the time period, first in order of frequency resource index and second in order of time resource index.
[0285] In a sixteenth aspect, alone or in combination with one or more of the first through fifteenth aspects, a second starting random access channel occasion of a second set of one or more random access channel occasions is after a time offset from the first starting random access channel occasion for a frequency resource index, .
[0286] In a seventeenth aspect, alone or in combination with one or more of the first through sixteenth aspects, the random access channel group is randomly selected from multiple random access channel groups, and the set of one or more random access channel occasions is randomly selected from the multiple sets of one or more random access channel occasions.
[0287] In a eighteenth aspect, alone or in combination with one or more of the first through seventeenth aspects, the random access channel communication is associated with a set of one or more random access channel occasions from multiple sets of one or more random access channel occasions included in an SSB group, wherein the SSB group is associated with the type.
[0288] In an nineteenth aspect, alone or in combination with one or more of the first through eighteenth aspects, process 1600 includes transmitting configuration information indicating a random access resource pool, wherein the random access resource pool includes the multiple sets of one or more random access channel occasions, wherein valid random access occasions in the random access resource pool are mapped to respective SSB groups of multiple SSB groups, and wherein the multiple SSB groups include the SSB group.
[0289] In a twentieth aspect, alone or in combination with one or more of the first through nineteenth aspects, the SSB group is associated with one or more virtual SSBs.
[0290] In a twenty-first aspect, alone or in combination with one or more of the first through twentieth aspects, the multiple sets of one or more random access channel occasions are mapped to SSB indexes within a time period, and the SSB indexes include one or more SSB indexes associated with respective virtual SSBs of the one or more virtual SSBs.
[0291] Although Fig. 16 shows example blocks of process 1600, in some aspects, process 1600 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Fig. 16. Additionally, or alternatively, two or more of the blocks of process 1600 may be performed in parallel.
[0292] Fig. 17 is a diagram of an example apparatus 1700 for wireless communication, in accordance with the present disclosure. The apparatus 1700 may be a network entity (e.g., a UE), or a network entity (e.g., a UE) may include the apparatus 1700. In some aspects, the apparatus 1700 includes a reception component 1702, a transmission component 1704, and / or a communication manager 1706, which may be in communication with one another (for example, via one or more buses and / or one or more other components) . In some aspects, the communication manager 1706 is the communication manager 114, the communication manager 118, or the communication manager 250. As shown, the apparatus 1700 may communicate with another apparatus 1708, such as a UE or a network node (such as a CU, a DU, an RU, or a base station) , using the reception component 1702 and the transmission component 1704. The communication manager 1706 may be included in, or implemented via, a processing system (for example, the processing system 110, the processing system 112, or the processing system 240) .
[0293] In some aspects, the apparatus 1700 may be configured to perform one or more operations described herein in connection with Figs. 9-13, 13A, 13B, and 14. Additionally, or alternatively, the apparatus 1700 may be configured to perform one or more processes described herein, such as process 1500 of Fig. 15, or a combination thereof. In some aspects, the apparatus 1700 and / or one or more components shown in Fig. 17 may include one or more components described in connection with Figs. 1-3. Additionally, or alternatively, one or more components shown in Fig. 17 may be implemented within one or more components described in connection with Figs. 1-3. Additionally, or alternatively, one or more components of the set of components may be implemented at least in part as software stored in one or more memories. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by one or more controllers or one or more processors to perform the functions or operations of the component.
[0294] The reception component 1702 may receive communications, such as reference signals, control information, data communications, or a combination thereof, from the apparatus 1708. The reception component 1702 may provide received communications to one or more other components of the apparatus 1700. In some aspects, the reception component 1702 may perform signal processing on the received communications, and may provide the processed signals to the one or more other components of the apparatus 1700. In some aspects, the reception component 1702 may include one or more components described above in connection with Figs. 1-3, such as a radio, one or more RF chains, one or more transceivers, or one or more modems, each of which may in turn be coupled with one or more antennas of the network entity.
[0295] The transmission component 1704 may transmit communications, such as reference signals, control information, data communications, or a combination thereof, to the apparatus 1708. In some aspects, one or more other components of the apparatus 1700 may generate communications and may provide the generated communications to the transmission component 1704 for transmission to the apparatus 1708. In some aspects, the transmission component 1704 may perform signal processing on the generated communications, and may transmit the processed signals to the apparatus 1708. In some aspects, the transmission component 1704 may include one or more components described above in connection with Figs. 1-3, such as a radio, one or more RF chains, one or more transceivers, or one or more modems, each of which may in turn be coupled with one or more antennas described in connection with Figs. 1-3. In some aspects, the transmission component 1704 may be co-located with the reception component 1702.
[0296] The communication manager 1706 may support operations of the reception component 1702 and / or the transmission component 1704. For example, the communication manager 1706 may receive information associated with configuring reception of communications by the reception component 1702 and / or transmission of communications by the transmission component 1704. Additionally, or alternatively, the communication manager 1706 may generate and / or provide control information to the reception component 1702 and / or the transmission component 1704 to control reception and / or transmission of communications.
[0297] The reception component 1702 may receive an indication of a first measurement threshold. The reception component 1702 may receive one or more SSBs. The transmission component 1704 may transmit a random access channel communication that has a type from multiple types, wherein the type is selected based on the first measurement threshold and measurement information associated with the one or more SSBs.
[0298] The reception component 1702 may receive configuration information for a non-repetition configuration based on the reception of the indication of the first measurement threshold. The reception component 1702 may receive configuration information indicating a quantity of multiple random access channel groups including the random access channel group. The reception component 1702 may receive an indication of the frequency offset.
[0299] The reception component 1702 may receive configuration information indicating a random access resource pool, wherein the random access resource pool includes the multiple sets of one or more random access channel occasions, wherein valid random access occasions in the random access resource pool are mapped to respective SSB groups of multiple SSB groups, and wherein the multiple SSB groups include the SSB group.
[0300] The number and arrangement of components shown in Fig. 17 are provided as an example. In practice, there may be additional components, fewer components, different components, or differently arranged components than those shown in Fig. 17. Furthermore, two or more components shown in Fig. 17 may be implemented within a single component, or a single component shown in Fig. 17 may be implemented as multiple, distributed components. Additionally, or alternatively, a set of (one or more) components shown in Fig. 17 may perform one or more functions described as being performed by another set of components shown in Fig. 17.
[0301] Fig. 18 is a diagram of an example apparatus 1800 for wireless communication, in accordance with the present disclosure. The apparatus 1800 may be a network entity (e.g., a network node or TRP) , or a network entity (e.g., a network node or TRP) may include the apparatus 1800. In some aspects, the apparatus 1800 includes a reception component 1802, a transmission component 1804, and / or a communication manager 1806, which may be in communication with one another (for example, via one or more buses and / or one or more other components) . In some aspects, the communication manager 1806 is the communication manager 114, the communication manager 118, or the communication manager 255. As shown, the apparatus 1800 may communicate with another apparatus 1808, such as a UE or a network node (such as a CU, a DU, an RU, or a base station) , using the reception component 1802 and the transmission component 1804. The communication manager 1806 may be included in, or implemented via, a processing system (for example, the processing system 110, the processing system 112, or the processing system 245) of the network entity.
[0302] In some aspects, the apparatus 1800 may be configured to perform one or more operations described herein in connection with Figs. 9-12, 13A, 13B, and 14. Additionally, or alternatively, the apparatus 1800 may be configured to perform one or more processes described herein, such as process 1600 of Fig. 16, or a combination thereof. In some aspects, the apparatus 1800 and / or one or more components shown in Fig. 18 may include one or more components described in connection with Figs. 1-3. Additionally, or alternatively, one or more components shown in Fig. 18 may be implemented within one or more components described in connection with Figs. 1-3. Additionally, or alternatively, one or more components of the set of components may be implemented at least in part as software stored in one or more memories. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by one or more controllers or one or more processors to perform the functions or operations of the component.
[0303] The reception component 1802 may receive communications, such as reference signals, control information, data communications, or a combination thereof, from the apparatus 1808. The reception component 1802 may provide received communications to one or more other components of the apparatus 1800. In some aspects, the reception component 1802 may perform signal processing on the received communications, and may provide the processed signals to the one or more other components of the apparatus 1800. In some aspects, the reception component 1802 may include one or more components described above in connection with Figs. 1-3, such as a radio, one or more RF chains, one or more transceivers, or one or more modems, each of which may in turn be coupled with one or more antennas of the network entity.
[0304] The transmission component 1804 may transmit communications, such as reference signals, control information, data communications, or a combination thereof, to the apparatus 1808. In some aspects, one or more other components of the apparatus 1800 may generate communications and may provide the generated communications to the transmission component 1804 for transmission to the apparatus 1808. In some aspects, the transmission component 1804 may perform signal processing on the generated communications, and may transmit the processed signals to the apparatus 1808. In some aspects, the transmission component 1804 may include one or more components described above in connection with Figs. 1-3, such as a radio, one or more RF chains, one or more transceivers, or one or more modems, each of which may in turn be coupled with one or more antennas described in connection with Figs. 1-3. In some aspects, the transmission component 1804 may be co-located with the reception component 1802.
[0305] The communication manager 1806 may support operations of the reception component 1802 and / or the transmission component 1804. For example, the communication manager 1806 may receive information associated with configuring reception of communications by the reception component 1802 and / or transmission of communications by the transmission component 1804. Additionally, or alternatively, the communication manager 1806 may generate and / or provide control information to the reception component 1802 and / or the transmission component 1804 to control reception and / or transmission of communications.
[0306] The transmission component 1804 may transmit an indication of a first measurement threshold that is associated with type selection for random access channel communication from multiple types. The reception component 1802 may receive a random access channel communication that has a type from the multiple types.
[0307] The transmission component 1804 may transmit configuration information for a non-repetition configuration based on the transmission of the indication of the first measurement threshold. The transmission component 1804 may transmit configuration information indicating a quantity of multiple random access channel groups including the random access channel group. The transmission component 1804 may transmit an indication of the frequency offset.
[0308] The transmission component 1804 may transmit configuration information indicating a random access resource pool, wherein the random access resource pool includes the multiple sets of one or more random access channel occasions, wherein valid random access occasions in the random access resource pool are mapped to respective SSB groups of multiple SSB groups, and wherein the multiple SSB groups include the SSB group.
[0309] The number and arrangement of components shown in Fig. 18 are provided as an example. In practice, there may be additional components, fewer components, different components, or differently arranged components than those shown in Fig. 18. Furthermore, two or more components shown in Fig. 18 may be implemented within a single component, or a single component shown in Fig. 18 may be implemented as multiple, distributed components. Additionally, or alternatively, a set of (one or more) components shown in Fig. 18 may perform one or more functions described as being performed by another set of components shown in Fig. 18.
[0310] The following provides an overview of some Aspects of the present disclosure:
[0311] Aspect 1: A method of wireless communication performed by a first network entity, comprising: receiving an indication of a first measurement threshold; receiving one or more synchronization signal blocks (SSBs) ; and transmitting a random access channel communication that has a type from multiple types, wherein the type is selected based on the first measurement threshold and measurement information associated with the one or more SSBs.
[0312] Aspect 2: The method of Aspect 1, wherein the measurement information indicates a value, and wherein the type is selected based on whether the value satisfies the first measurement threshold.
[0313] Aspect 3: The method of any of Aspects 1-2, wherein the type is associated with transmission, of the random access channel communication, based on reception of the one or more SSBs, wherein, to transmit the random access channel communication, the method further comprises: transmitting the random access channel communication using spatial domain information that is based on second measurement information of an SSB of the one or more SSBs, wherein the second measurement information indicates a value that satisfies a second measurement threshold.
[0314] Aspect 4: The method of any of Aspects 1-3, wherein the multiple types include a first type, a second type, and a third type, wherein the first type and the second type are associated with transmission, of the random access channel communication, based on reception of the one or more SSBs, wherein the first type is not associated with repetitions of the random access channel communication, wherein the second type is associated with repetitions of the random access channel communication, wherein the third type is associated with transmission, of the random access channel communication, that is not based on reception of the one or more SSBs, and the method further comprising: selecting, from the first type and the second type, a repetition type of the random access channel communication, wherein the repetition type is based on the measurement information and one or more repetition measurement thresholds; and selecting, from the repetition type and the third type, the type based on the first measurement threshold and the measurement information.
[0315] Aspect 5: The method of Aspect 4, wherein the repetition type is the second type, and wherein the repetition type indicates a quantity of repetitions of the random access channel communication.
[0316] Aspect 6: The method of any of Aspects 1-5, wherein the multiple types include a first type and a second type, wherein the first type is associated with transmission, of the random access channel communication, based on reception of the one or more SSBs, wherein the second type is associated with transmission, of the random access channel communication, that is not based on reception of the one or more SSBs, and the method further comprising: selecting, from the first type and the second type, the type based on the first measurement threshold and the measurement information.
[0317] Aspect 7: The method of Aspect 6, wherein the type is the first type, and wherein a quantity of repetitions of the random access channel communications is based on the measurement information and one or more repetition measurement thresholds.
[0318] Aspect 8: The method of any of Aspects 1-7, further comprising: receiving configuration information for a non-repetition configuration based on the reception of the indication of the first measurement threshold.
[0319] Aspect 9: The method of any of Aspects 1-8, wherein the multiple types include a first type and a second type, wherein the first type is associated with transmission, of the random access channel communication, based on reception of the one or more SSBs, wherein the first type is not associated with repetitions of random access channel communication, wherein the second type is associated with transmission, of the random access channel communication, that is not based on reception of the one or more SSBs, and wherein the second type is associated with repetitions of random access communication.
[0320] Aspect 10: The method of any of Aspects 1-9, wherein receiving the one or more SSB comprises receiving the one or more SSBs from a second network entity.
[0321] Aspect 11: The method of Aspect 10, wherein the type is a first type, and wherein transmitting the random access channel communication comprises transmitting the random access channel communication to the second network entity.
[0322] Aspect 12: The method of Aspect 10, wherein the type is a second type, and wherein transmitting the random access channel communication comprises transmitting the random access channel communication to a third network entity.
[0323] Aspect 13: The method of any of Aspects 1-12, wherein the type is associated with transmission, of the random access channel communication, that is not based on reception of the one or more SSBs, and wherein transmitting the random access channel communication comprises: transmitting repetitions of the random access channel communication, wherein the repetitions are associated with respective spatial directions.
[0324] Aspect 14: The method of any of Aspects 1-13, wherein the random access channel communication is associated with a set of one or more random access channel occasions from multiple sets of one or more random access channel occasions included in a random access channel group.
[0325] Aspect 15: The method of Aspect 14, wherein a quantity of the set of one or more random access channel occasions is based on a transmit beam sweeping parameter and a receive beam sweeping parameter.
[0326] Aspect 16: The method of any of Aspects 14-15, further comprising receiving configuration information indicating a quantity of multiple random access channel groups including the random access channel group.
[0327] Aspect 17: The method of Aspect 16, wherein the multiple sets of one or more random access channel occasions are a subset of random access channel occasions from all the valid random access channel occasions in a random access resource pool, and wherein the multiple random access channel groups are mapped to all the valid random access channel occasions based on one or more mapping rules.
[0328] Aspect 18: The method of any of Aspects 14-17, wherein the set of one or more random access channel occasions are associated with same frequency domain resources.
[0329] Aspect 19: The method of any of Aspects 14-18, wherein one or more first random access channel occasions, from the set of one or more random access channel occasions, are associated with first frequency domain resources, and wherein one or more second random access channel occasions, from the set of one or more random access channel occasions, are associated with second frequency domain resources.
[0330] Aspect 20: The method of Aspect 19, wherein there is a frequency offset between the first frequency domain resources and the second frequency domain resources.
[0331] Aspect 21: The method of Aspect 20, further comprising receiving an indication of the frequency offset.
[0332] Aspect 22: The method of any of Aspects 19-21, wherein the one or more first random access channel occasions occur before the one or more second random access channel occasions in a time domain.
[0333] Aspect 23: The method of any of Aspects 19-22, wherein the one or more first random access channel occasions are associated with even indexes, and wherein the one or more second random access channel occasions are associated with odd indexes.
[0334] Aspect 24: The method of any of Aspects 14-23, wherein the multiple sets of one or more random access occasions are within a time period, wherein a starting random access channel occasion of a first set of one or more random access channel occasions, of the multiple sets of one or more random access channel occasions, is based on a first valid random access channel occasion in the time period, and wherein starting random access channel occasions of one or more other sets of one or more random access channel occasions, of the multiple sets of one or more random access channel occasions are firstly ordered in order of frequency resource index and secondly ordered in order of time resource index.
[0335] Aspect 25: The method of any of Aspects 14-24, wherein the multiple sets of one or more random access occasions are within a time period, wherein, for each frequency resource index, a first starting random access channel occasion of a first set of one or more random access channel occasions, of the multiple sets of one or more random access channel occasions, is based on a first valid random access channel occasion in the time period, first in order of frequency resource index and second in order of time resource index.
[0336] Aspect 26: The method of Aspect 25, wherein a second starting random access channel occasion of a second set of one or more random access channel occasions is after a time offset from the first starting random access channel occasion for a frequency domain index.
[0337] Aspect 27: The method of any of Aspects 14-26, wherein the random access channel group is randomly selected from multiple random access channel groups, and wherein the set of one or more random access channel occasions is randomly selected from the multiple sets of one or more random access channel occasions.
[0338] Aspect 28: The method of any of Aspects 1-27, wherein the random access channel communication is associated with a set of one or more random access channel occasions from multiple sets of one or more random access channel occasions included in an SSB group, wherein the SSB group is associated with the type.
[0339] Aspect 29: The method of Aspect 28, further comprising: receiving configuration information indicating a random access resource pool, wherein the random access resource pool includes the multiple sets of one or more random access channel occasions, wherein valid random access occasions in the random access resource pool are mapped to respective SSB groups of multiple SSB groups, and wherein the multiple SSB groups include the SSB group.
[0340] Aspect 30: The method of any of Aspects 28-29, wherein the SSB group is associated with one or more virtual SSBs.
[0341] Aspect 31: The method of Aspect 30, wherein the multiple sets of one or more random access channel occasions are mapped to SSB indexes within a time period, and wherein the SSB indexes include one or more SSB indexes associated with respective virtual SSBs of the one or more virtual SSBs.
[0342] Aspect 32: A method of wireless communication performed by a first network entity, comprising: transmitting an indication of a first measurement threshold that is associated with type selection for random access channel communication from multiple types; and receiving a random access channel communication that has a type from the multiple types.
[0343] Aspect 33: The method of Aspect 32, wherein the multiple types include a first type, a second type, and a third type, wherein the first type and the second type are associated with transmission, of the random access channel communication, based on synchronization signal block reception, wherein the first type is not associated with repetitions of the random access channel communication, wherein the second type is associated with repetitions of the random access channel communication, wherein the third type is associated with transmission, of the random access channel communication, that is not based on synchronization signal block reception.
[0344] Aspect 34: The method of any of Aspects 32-33, further comprising transmitting configuration information for a non-repetition configuration based on the transmission of the indication of the first measurement threshold.
[0345] Aspect 35: The method of any of Aspects 32-34, wherein the multiple types include a first type and a second type, wherein the first type is associated with transmission, of the random access channel communication, based on synchronization signal block reception, wherein the first type is not associated with repetitions of random access channel communication, wherein the second type is associated with transmission, of the random access channel communication, that is not based on synchronization signal block reception, and wherein the second type is associated with repetitions of random access communication.
[0346] Aspect 36: The method of any of Aspects 32-35, wherein the random access channel communication is associated with a set of one or more random access channel occasions from multiple sets of one or more random access channel occasions included in a random access channel group.
[0347] Aspect 37: The method of Aspect 36, wherein a quantity of the set of one or more random access channel occasions is based on a transmit beam sweeping parameter and a receive beam sweeping parameter.
[0348] Aspect 38: The method of any of Aspects 36-27, further comprising transmitting configuration information indicating a quantity of multiple random access channel groups including the random access channel group.
[0349] Aspect 39: The method of Aspect 38, wherein the multiple sets of one or more random access channel occasions are a subset of random access channel occasions from all the valid random access channel occasions in a random access resource pool, and wherein the multiple random access channel groups are mapped to all the valid random access channel occasions based on one or more mapping rules.
[0350] Aspect 40: The method of any of Aspects 36-38, wherein the set of one or more random access channel occasions are associated with same frequency domain resources.
[0351] Aspect 41: The method of any of Aspects 36-39, wherein one or more first random access channel occasions, from the set of one or more random access channel occasions, are associated with first frequency domain resources, and wherein one or more second random access channel occasions, from the set of one or more random access channel occasions, are associated with second frequency domain resources.
[0352] Aspect 42: The method of Aspect 41, wherein there is a frequency offset between the first frequency domain resources and the second frequency domain resources.
[0353] Aspect 43: The method of Aspect 42, further comprising transmitting an indication of the frequency offset.
[0354] Aspect 44: The method of any of Aspects 41-43, wherein the one or more first random access channel occasions occur before the one or more second random access channel occasions in a time domain.
[0355] Aspect 45: The method of any of Aspects 41-44, wherein the one or more first random access channel occasions are associated with even indexes, and wherein the one or more second random access channel occasions are associated with odd indexes.
[0356] Aspect 46: The method of any of Aspects 36-45, wherein the multiple sets of one or more random access occasions are within a time period, wherein a starting random access channel occasion of a first set of one or more random access channel occasions, of the multiple sets of one or more random access channel occasions, is based on a first valid random access channel occasion in the time period, and wherein starting random access channel occasions of one or more other sets of one or more random access channel occasions, of the multiple sets of one or more random access channel occasions are firstly ordered in order of frequency resource index and secondly ordered in order of time resource index.
[0357] Aspect 47: The method of any of Aspects 36-46, wherein the multiple sets of one or more random access occasions are within a time period, wherein, for each frequency resource index, a first starting random access channel occasion of a first set of one or more random access channel occasions, of the multiple sets of one or more random access channel occasions, is based on a first valid random access channel occasion in the time period, first in order of frequency resource index and second in order of time resource index.
[0358] Aspect 48: The method of Aspect 47, wherein a second starting random access channel occasion of a second set of one or more random access channel occasions is after a time offset from the first starting random access channel occasion for a frequency resource index.
[0359] Aspect 49: The method of any of Aspects 36-48, wherein the random access channel group is randomly selected from multiple random access channel groups, and wherein the set of one or more random access channel occasions is randomly selected from the multiple sets of one or more random access channel occasions.
[0360] Aspect 50: The method of any of Aspects 32-49, wherein the random access channel communication is associated with a set of one or more random access channel occasions from multiple sets of one or more random access channel occasions included in an SSB group, wherein the SSB group is associated with the type.
[0361] Aspect 51: The method of Aspect 50, further comprising: transmitting configuration information indicating a random access resource pool, wherein the random access resource pool includes the multiple sets of one or more random access channel occasions, wherein valid random access occasions in the random access resource pool are mapped to respective SSB groups of multiple SSB groups, and wherein the multiple SSB groups include the SSB group.
[0362] Aspect 52: The method of any of Aspects 50-51, wherein the SSB group is associated with one or more virtual SSBs.
[0363] Aspect 53: The method of Aspect 52, wherein the multiple sets of one or more random access channel occasions are mapped to SSB indexes within a time period, and wherein the SSB indexes include one or more SSB indexes associated with respective virtual SSBs of the one or more virtual SSBs.
[0364] Aspect 54: An apparatus for wireless communication at a device, the apparatus comprising one or more processors; one or more memories coupled with the one or more processors; and instructions stored in the one or more memories and executable by the one or more processors to cause the apparatus to perform the method of one or more of Aspects 1-53.
[0365] Aspect 55: An apparatus for wireless communication at a device, the apparatus comprising one or more memories and one or more processors coupled to the one or more memories, the one or more processors configured to cause the device to perform the method of one or more of Aspects 1-53.
[0366] Aspect 56: An apparatus for wireless communication, the apparatus comprising at least one means for performing the method of one or more of Aspects 1-53.
[0367] Aspect 57: A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by one or more processors to perform the method of one or more of Aspects 1-53.
[0368] Aspect 58: A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising one or more instructions that, when executed by one or more processors of a device, cause the device to perform the method of one or more of Aspects 1-53.
[0369] Aspect 59: A device for wireless communication, the device comprising a processing system that includes one or more processors and one or more memories coupled with the one or more processors, the processing system configured to cause the device to perform the method of one or more of Aspects 1-53.
[0370] Aspect 60: An apparatus for wireless communication at a device, the apparatus comprising one or more memories and one or more processors coupled to the one or more memories, the one or more processors individually or collectively configured to cause the device to perform the method of one or more of Aspects 1-53.
[0371] Aspect 61: A device for wireless communication, the device comprising a processing system, the processing system configured to perform the method of one or more of Aspects 1-53.
[0372] Aspect 62: A non-transitory computer-readable medium having code stored thereon that, when executed by a device, causes the device to perform the method of one or more of Aspects 1-53.
[0373] The foregoing disclosure provides illustration and description but is neither exhaustive nor limiting of the scope of this disclosure. For example, various aspects and examples are disclosed herein, but this disclosure is not limited to the precise form in which such aspects and examples are described. Modifications and variations may be made in light of the above disclosure or may be acquired from practice of the aspects.
[0374] As used herein, the term “component” shall be broadly construed as hardware or a combination of hardware and at least one of software or firmware. “Software” shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, or functions, among other examples, whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise. As used herein, a “processor” is implemented in hardware or a combination of hardware and software. Systems or methods described herein may be implemented in different forms of hardware or a combination of hardware and software. The actual specialized control hardware or software code used to implement these systems or methods is not limiting of the aspects. Thus, the operation and behavior of the systems or methods are described herein without reference to specific software code, because those skilled in the art understand that software and hardware can be designed to implement the systems or methods based, at least in part, on the description herein. A component being configured to perform a function means that the component has a capability to perform the function, and does not require the function to be actually performed by the component, unless noted otherwise.
[0375] As used herein, “satisfying a threshold” may, depending on the context, refer to a value being greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, or not equal to the threshold, among other examples.
[0376] As used herein, the term “determine” or “determining” encompasses a wide 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) , inferring, ascertaining, and / or measuring, among other examples. Also, “determining” can include receiving (such as receiving information) , accessing (such as accessing data stored in memory) , and / or transmitting (such as transmitting information) , among other examples. As another example, “determining” can include resolving, selecting, obtaining, choosing, establishing, and / or other such similar actions.
[0377] Even though particular combinations of features are recited in the claims and / or disclosed in the specification, these combinations do not limit the scope of the disclosure. Many of these features may be combined in ways not specifically recited in the claims and / or disclosed in the specification. The disclosure of various aspects includes each dependent claim in combination with every other claim in the claim set. As used herein, a phrase referring to “at least one of” a list of items refers to any combination of those items, including single members. As used herein, a phrase referring to “at least one of” a list of items refers to any combination of those items, including single members. As an example, “at least one of: a, b, or c” covers a, b, c, a + b, a + c, b + c, and a + b + c, as well as any combination with multiples of the same element (for example, a + a, a + a + a, a + a + b, a + a + c, a + b + b, a + c + c, b + b, b + b + b, b + b + c, c + c, and c + c + c, or any other ordering of a, b, and c) .
[0378] No element, act, or instruction used herein should be construed as critical or essential unless explicitly described as such. Also, as used herein, the articles “a” and “an” include one or more items and may be used interchangeably with “one or more. ” Further, as used herein, the article “the” may include one or more items referenced in connection with the article “the” and may be used interchangeably with “the one or more. ” Furthermore, as used herein, the terms “set” and “group” may include one or more items and may be used interchangeably with “one or more. ” Where only one item is intended, the phrase “only one” or similar language is used. Also, as used herein, the terms “has, ” “have, ” “having, ” and similar terms are open-ended terms that do not limit an element that they modify (for example, an element “having” A may also have B) . Further, the phrase “based on” means “based on or otherwise in association with” unless explicitly stated otherwise. Additionally, as used herein, the phrase “based on” shall not be construed as a reference to a closed set of information, one or more conditions, one or more factors, or the like. Also, as used herein, the term “or” is inclusive when used in a series and may be used interchangeably with “and / or, ” unless explicitly stated otherwise (for example, if used in combination with “either” or “only one of” ) . Further, “one or more” may be equivalent to “at least one. ”
[0379] Even though particular combinations of features are recited in the claims or disclosed in the specification, these combinations are not limiting of the disclosure of various aspects. Many of these features may be combined in ways not specifically recited in the claims or disclosed in the specification. The disclosure of various aspects includes each dependent claim in combination with every other claim in the claim set.
Claims
1.A first network entity, comprising:a processing system configured to:receive an indication of a first measurement threshold;receive one or more synchronization signal blocks (SSBs) ; andtransmit a random access channel communication that has a type from multiple types, wherein the type is selected based on the first measurement threshold and measurement information associated with the one or more SSBs.2.The first network entity of claim 1, wherein the measurement information indicates a value, and wherein the type is selected based on whether the value satisfies the first measurement threshold.3.The first network entity of claim 1, wherein the type is associated with transmission, of the random access channel communication, based on reception of the one or more SSBs, wherein, to transmit the random access channel communication, the processing system is configured to:transmit the random access channel communication using spatial domain information that is based on second measurement information of an SSB of the one or more SSBs, wherein the second measurement information indicates a value that satisfies a second measurement threshold.4.The first network entity of claim 1, wherein the multiple types include a first type, a second type, and a third type, wherein the first type and the second type are associated with transmission, of the random access channel communication, based on reception of the one or more SSBs, wherein the first type is not associated with repetitions of the random access channel communication, wherein the second type is associated with repetitions of the random access channel communication, wherein the third type is associated with transmission, of the random access channel communication, that is not based on reception of the one or more SSBs, and wherein the processing system is configured to:select, from the first type and the second type, a repetition type of the random access channel communication, wherein the repetition type is based on the measurement information and one or more repetition measurement thresholds; andselect, from the repetition type and the third type, the type based on the first measurement threshold and the measurement information.5.The first network entity of claim 1, wherein the multiple types include a first type and a second type, wherein the first type is associated with transmission, of the random access channel communication, based on reception of the one or more SSBs, wherein the second type is associated with transmission, of the random access channel communication, that is not based on reception of the one or more SSBs, and wherein the processing system is configured to:select, from the first type and the second type, the type based on the first measurement threshold and the measurement information.6.The first network entity of claim 1, wherein the multiple types include a first type and a second type, wherein the first type is associated with transmission, of the random access channel communication, based on reception of the one or more SSBs, wherein the first type is not associated with repetitions of random access channel communication, wherein the second type is associated with transmission, of the random access channel communication, that is not based on reception of the one or more SSBs, and wherein the second type is associated with repetitions of random access communication.7.The first network entity of claim 1, wherein the type is associated with transmission, of the random access channel communication, that is not based on reception of the one or more SSBs, and wherein, to transmit the random access channel communication, the processing system is configured to:transmit repetitions of the random access channel communication, wherein the repetitions are associated with respective spatial directions.8.The first network entity of claim 1, wherein the random access channel communication is associated with a set of one or more random access channel occasions from multiple sets of one or more random access channel occasions included in a random access channel group.9.The first network entity of claim 8, wherein a quantity of the set of one or more random access channel occasions is based on a transmit beam sweeping parameter and a receive beam sweeping parameter.10.The first network entity of claim 8, wherein the processing system is configured to receive configuration information indicating a quantity of multiple random access channel groups including the random access channel group.11.The first network entity of claim 10, wherein the multiple sets of one or more random access channel occasions are a subset of random access channel occasions from valid random access channel occasions in a random access resource pool, and wherein the multiple random access channel groups are mapped to all the valid random access channel occasions based on one or more mapping rules.12.The first network entity of claim 8, wherein the set of one or more random access channel occasions are associated with same frequency domain resources.13.The first network entity of claim 8, wherein one or more first random access channel occasions, from the set of one or more random access channel occasions, are associated with first frequency domain resources, andwherein one or more second random access channel occasions, from the set of one or more random access channel occasions, are associated with second frequency domain resources.14.The first network entity of claim 13, wherein there is a frequency offset between the first frequency domain resources and the second frequency domain resources.15.The first network entity of claim 14, wherein the processing system is configured to receive an indication of the frequency offset.16.The first network entity of claim 13, wherein the one or more first random access channel occasions occur before the one or more second random access channel occasions in a time domain.17.The first network entity of claim 13, wherein the one or more first random access channel occasions are associated with even indexes, and wherein the one or more second random access channel occasions are associated with odd indexes.18.The first network entity of claim 8, wherein the multiple sets of one or more random access occasions are within a time period, wherein a starting random access channel occasion of a first set of one or more random access channel occasions, of the multiple sets of one or more random access channel occasions, is based on a first valid random access channel occasion in the time period, and wherein starting random access channel occasions of one or more other sets of one or more random access channel occasions, of the multiple sets of one or more random access channel occasions are firstly ordered in order of frequency resource index and secondly ordered in order of time resource index.19.The first network entity of claim 8, wherein the multiple sets of one or more random access occasions are within a time period, wherein, for each frequency resource index, a first starting random access channel occasion of a first set of one or more random access channel occasions, of the multiple sets of one or more random access channel occasions, is based on a first valid random access channel occasion in the time period, first in order of frequency resource index and second in order of time resource index.20.The first network entity of claim 19, wherein a second starting random access channel occasion of a second set of one or more random access channel occasions is after a time offset from the first starting random access channel occasion for a frequency resource index.21.The first network entity of claim 1, wherein the random access channel communication is associated with a set of one or more random access channel occasions from multiple sets of one or more random access channel occasions included in an SSB group, wherein the SSB group is associated with the type.22.The first network entity of claim 21, wherein the processing system is configured to:receive configuration information indicating a random access resource pool, wherein the random access resource pool includes the multiple sets of one or more random access channel occasions, wherein valid random access occasions in the random access resource pool are mapped to respective SSB groups of multiple SSB groups, and wherein the multiple SSB groups include the SSB group.23.The first network entity of claim 21, wherein the SSB group is associated with one or more virtual SSBs.24.The first network entity of claim 23, wherein the multiple sets of one or more random access channel occasions are mapped to SSB indexes within a time period, and wherein the SSB indexes include one or more SSB indexes associated with respective virtual SSBs of the one or more virtual SSBs.25.A first network entity, comprising:a processing system configured to:transmit an indication of a first measurement threshold that is associated with type selection for random access channel communication from multiple types; andreceive a random access channel communication that has a type from the multiple types.26.The first network entity of claim 25, wherein the multiple types include a first type, a second type, and a third type, wherein the first type and the second type are associated with transmission, of the random access channel communication, based on synchronization signal block reception, wherein the first type is not associated with repetitions of the random access channel communication, wherein the second type is associated with repetitions of the random access channel communication, wherein the third type is associated with transmission, of the random access channel communication, that is not based on synchronization signal block reception.27.The first network entity of claim 25, wherein the processing system is configured to transmit configuration information for a non-repetition configuration based on the transmission of the indication of the first measurement threshold.28.The first network entity of claim 25, wherein the multiple types include a first type and a second type, wherein the first type is associated with transmission, of the random access channel communication, based on synchronization signal block reception, wherein the first type is not associated with repetitions of random access channel communication, wherein the second type is associated with transmission, of the random access channel communication, that is not based on synchronization signal block reception, and wherein the second type is associated with repetitions of random access communication.29.A method of wireless communication performed by a first network entity, comprising:receiving an indication of a first measurement threshold;receiving one or more synchronization signal blocks (SSBs) ; andtransmitting a random access channel communication that has a type from multiple types, wherein the type is selected based on the first measurement threshold and measurement information associated with the one or more SSBs.30.A method of wireless communication performed by a first network entity, comprising:transmitting an indication of a first measurement threshold that is associated with type selection for random access channel communication from multiple types; andreceiving a random access channel communication that has a type from the multiple types.