Resources used for On-Demand System Information Block 1 (SIB1) requests

Abstract

Various aspects of the present disclosure relate to resources for on-demand system information block 1 (SIB1) requests. A device, e.g., a user equipment (UE), receives cell-related information in a synchronization signal block (SSB). The UE transmits a first signal including an on-demand SIB1 request on first resources determined based at least in part on the received SSB.

Description

Related applications

[0001] This application claims priority to U.S. Provisional Application No. 63 / 574,197, filed April 3, 2024, entitled “Resources for On-Demand System Information Block 1 (SIB1) Requests,” the entire disclosure of which is incorporated herein by reference. Technical Field

[0002] This disclosure relates to wireless communication, and more specifically to power saving in wireless communication systems. Background Technology

[0003] A wireless communication system may include one or more network communication devices, which may also be referred to as network equipment (NE), supporting wireless communication with one or more user communication devices, which may also be referred to as user equipment (UE) or other suitable terms. The wireless communication system can support wireless communication with one or more user communication devices by utilizing the resources of the wireless communication system (e.g., time resources (e.g., symbols, time slots, subframes, frames, etc.) or frequency resources (e.g., subcarriers, carriers, etc.)). Furthermore, the wireless communication system can support wireless communication across various radio access technologies, including third-generation (3G), fourth-generation (4G), fifth-generation (5G), and other suitable radio access technologies other than 5G (e.g., sixth-generation (6G)). Summary of the Invention

[0004] The article “a” preceding an element is unrestricted and should be understood to refer to “at least one” or “one or more” of those elements. The terms “a,” “at least one,” “one or more,” and “at least one of one or more” are interchangeable. As used herein, the word “or,” as used in a list of items (e.g., a list of items beginning with phrases such as “at least one,” “one or more,” or “one or two”) indicates an inclusive list, such that a list of at least one of, for example, A, B, or C means A or B or C or AB or AC or BC or ABC (i.e., A and B and C). Furthermore, as used herein, the phrase “based on” should not be construed as referring to a closed set of conditions. For example, without departing from the scope of this disclosure, an example step described as “based on condition A” may be based on both condition A and condition B. In other words, as used herein, the phrase “based on” should be interpreted in the same manner as the phrase “at least partially based on.” Furthermore, as used herein, the word “group” may comprise one or more elements.

[0005] A UE for wireless communication is described. The UE may be configured, enabled, or operable to perform one or more operations as described herein. For example, the UE may be configured, enabled, or operable to receive cell-related information in a synchronization signal block (SSB); and to transmit a first signal on a first resource determined at least in part based on the received SSB, the first signal including an on-demand system information block 1 (SIB1) request.

[0006] A processor (e.g., a component of a standalone processor chipset or UE) for wireless communication is described. The processor may be configured, enabled, or operable to perform one or more operations as described herein. For example, the processor may be configured, enabled, or operable to receive cell-related information in an SSB; and to transmit a first signal on a first resource determined at least in part based on the received SSB, the first signal including an on-demand SIB1 request.

[0007] A method for wireless communication, performed by or potentially performed by a UE, is described. The method may include receiving cell-related information from an SSB; and transmitting a first signal on a first resource determined at least in part based on the received SSB, the first signal including an on-demand SIB1 request.

[0008] In some embodiments of the UE, processor, and method described herein, the UE, processor, and method may be further configured to, be able to, be operable to, be executed to, or be executable to enable the UE to receive SIB1 transmissions at least in part based on the on-demand SIB1 request.

[0009] In some embodiments of the UE, processor, and method described herein, the UE, processor, and method may be further configured to, be able to, be operable to, be executed to, or be executable to transmit the first signal at least in part based on the SSB, the SSB including a cell identifier configured for on-demand SIB1 transmission.

[0010] In some implementations of the UE, processor, and methods described herein, the cell identifier includes a physical cell identifier (PCID).

[0011] In some implementations of the UE, processor, and method described herein, the first resource includes physical random access channel (PRACH) resources.

[0012] In some embodiments of the UE, processor, and method described herein, the UE, processor, and method may be further configured to, be able to, be operable to, be executed to, or be executable to determine the first resource at least in part based on a second resource, the SSB being received via the second resource.

[0013] In some embodiments of the UE, processor, and method described herein, the UE, processor, and method may be further configured to, be able to, be operable to, be executed to, or be executable to determine the first resource at least in part based on a frequency reference point associated with reception of the SSB.

[0014] In some embodiments of the UE, processor, and method described herein, the frequency reference point includes the lowest subcarrier in which the SSB or at least one of one or more components of the SSB is received.

[0015] In some embodiments of the UE, processor, and method described herein, the UE, processor, and method may be further configured to, be able to, be operable to, be executed to, or be executable to determine the first resource at least in part based on the subcarrier offset between the frequency reference point and the resource block grid of the subcarrier.

[0016] In some embodiments of the UE, processor, and method described herein, the UE, processor, and method may be further configured to, be able to, be operable to, be executed to, or be executable to determine the first resource at least in part based on the PCID indicated by the SSB.

[0017] In some embodiments of the UE, processor, and method described herein, the UE, processor, and method may be further configured to, be able to, be operable to, be executed to, or be executable to determine the first resource at least in part based on one or more of the SSB's Master Information Block (MIB) or Physical Broadcast Channel (PBCH).

[0018] A newline (NE) (e.g., a base station) for wireless communication is described. The NE may be configured, enabled, or operable to perform one or more operations as described herein. For example, the NE may be configured, enabled, or operable to transmit an SSB containing an indication of at least a first resource for transmitting an on-demand SIB1 request; receive the on-demand SIB1 request via the first resource; and transmit an SIB1 at least in part based on the on-demand SIB1 request.

[0019] A processor (e.g., a component of a standalone processor chipset or NE) for wireless communication is described. The processor may be configured, enabled, or operable to perform one or more operations as described herein. For example, the processor may be configured, enabled, or operable to transmit an SSB including an indication of at least a first resource for transmitting an on-demand SIB1 request; receive the on-demand SIB1 request via the first resource; and transmit an SIB1 at least in part based on the on-demand SIB1 request.

[0020] A method for wireless communication is described, performed by or potentially performed by an NE (e.g., a base station). The method may include transmitting an SSB containing an indication of at least a first resource for transmitting an on-demand SIB1 request; receiving the on-demand SIB1 request via the first resource; and transmitting an SIB1 at least in part based on the on-demand SIB1 request.

[0021] In some implementations of the NE, processor, and method described herein, the SSB includes a cell identifier configured for on-demand SIB1 transmission.

[0022] In some implementations of the NE, processor, and method described herein, the cell identifier includes a PCID.

[0023] In some embodiments of the NE, processor, and method described herein, the SSB includes an indication for determining a frequency reference point for the first resource.

[0024] In some embodiments of the NE, processor, and method described herein, the frequency reference point includes the lowest subcarrier in which the SSB or at least one of one or more components of the SSB is transmitted.

[0025] In some embodiments of the NE, processor, and method described herein, the SSB includes an indication of a subcarrier offset between the frequency reference point and a resource block grid of subcarriers, wherein the subcarrier offset is configured to determine the first resource.

[0026] In some embodiments of the NE, processor, and method described herein, the SSB includes a PCID configured to determine the first resource. Attached Figure Description

[0027] Figure 1 Examples of wireless communication systems according to aspects of this disclosure are described.

[0028] Figure 2 Explain the time and frequency structure of the synchronization signal (SS) / PBCH block.

[0029] Figure 3 and 4 This describes an instance of the timing of candidate SS / PBCH blocks within an SS burst set.

[0030] Figure 5 This document describes example programs used for MIB and SIB transmissions and relationships within the SIB.

[0031] Figure 6 This describes a method for obtaining on-demand SIB1 according to aspects of this disclosure.

[0032] Figure 7 Examples of UEs based on aspects of this disclosure are described.

[0033] Figure 8 Examples of processors according to aspects of this disclosure are described.

[0034] Figure 9 Examples of NEs based on aspects of this disclosure are described.

[0035] Figure 10 A flowchart illustrating a method according to an aspect of this disclosure.

[0036] Figure 11 A flowchart illustrating a method according to an aspect of this disclosure.

[0037] Figure 12 A flowchart illustrating a method according to an aspect of this disclosure.

[0038] Figure 13 A flowchart illustrating a method according to an aspect of this disclosure. Detailed Implementation

[0039] In a wireless communication system, the UE and network equipment (NE) (e.g., a base station) can support wireless communication using time-frequency resources (e.g., receiving and / or transmitting wireless communication). To enable the UE to connect to the NE for wireless communication, the UE may attempt to achieve time and frequency synchronization with the NE and detect the NE's PCID. To achieve time / frequency synchronization with the NE, the NE may transmit synchronization signals, such as SSBs containing synchronization components, such as the Primary Synchronization Signal (PSS), Secondary Synchronization Signal (SSS), MIB, PBCH, PCID, etc. The UE may receive the SSB to obtain information for accessing and connecting to the NE.

[0040] For example, the NE can transmit SIB1 (e.g., as a Radio Resource Control (RRC) message on the Downlink Shared Channel (DL-SCH), and the UE can receive SIB1 and decode it using information from the MIB contained in the SSB. SIB1 can contain various information, such as availability and scheduling of other SIBs and RRC information. However, the NE may consume significant energy resources when transmitting different signaling messages containing the SSB, PBCH, MIB, and SIB1. For example, the NE may broadcast SIB1 periodically (e.g., every n milliseconds (ms), which can significantly contribute to the energy usage of the wireless communication system.

[0041] Therefore, this disclosure describes techniques for enabling a UE to determine whether an SIB1 transmission by an NE is available on demand, and techniques for enabling a UE to determine the resources (e.g., PRACH resources) for requesting an on-demand SIB1 transmission from the NE. For example, the availability of an on-demand SIB1 request can be determined in various ways, such as via a custom PCID, failure to receive an SIB1 after a threshold timer and / or a threshold number of SIB1 acquisition attempts, cell prohibition (e.g., in the MIB), a subcarrier offset indicating that an SIB1 has not been broadcast (e.g., will be requested on demand), and / or a value determined from the SSB and / or MIB. Based on the determination of whether an on-demand SIB transmission is available, the UE can determine whether to attempt to detect a broadcast SIB1 and / or request an on-demand SIB1 transmission.

[0042] Furthermore, the SIB1 request resources (e.g., PRACH resources, time / frequency resources, etc.) used to request on-demand SIB1 transmissions can be determined in various ways. For example, the UE can determine the request resources based on the resources on which it receives SSB transmissions. For example, the request resources can be determined as a combination of MIB and / or PBCH bits to determine the frequency offset of the resources used to determine the PRACH transmission request for SIB1. Alternatively or additionally, the PRACH timing for requesting SIB1 can be determined based on the PCID and / or MIB or PBCH content. Therefore, the implementation allows the NE to avoid broadcasting SIB1 (e.g., periodically) and respond to on-demand requests for SIB1 transmissions using targeted SIB1 transmissions.

[0043] By utilizing the described technology, power resource savings can be achieved from the perspectives of both the NE and the UE. For example, the NE can avoid periodic SIB1 broadcasts and respond to on-demand SIB1 requests via triggered SIB1 transmissions. Furthermore, the UE can minimize the SIB1 detection process and implement on-demand SIB1 requests to the NE.

[0044] Aspects of this disclosure are described in the context of wireless communication systems.

[0045] Figure 1 This section describes an example of a wireless communication system 100 according to aspects of this disclosure. The wireless communication system 100 may include one or more NEs 102, one or more UEs 104, and a core network (CN) 106. The wireless communication system 100 may support various radio access technologies. In some embodiments, the wireless communication system 100 may be a 4G network, such as an LTE network or an LTE-A network. In some other embodiments, the wireless communication system 100 may be an NR network, such as a 5G network, a 5G-A network, or a 5G Ultra Wideband (5G-UWB) network. In other embodiments, the wireless communication system 100 may be a combination of 4G and 5G networks, or other suitable radio access technologies, including IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), and IEEE 802.20. The wireless communication system 100 may support radio access technologies other than 5G, such as 6G. In addition, the wireless communication system 100 can support technologies such as Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), or Code Division Multiple Access (CDMA).

[0046] One or more NEs 102 may be distributed across a geographical area to form a wireless communication system 100. One or more of the NEs 102 described herein may be, include, or be referred to as a network node, base station, network element, network function, network entity, radio access network (RAN), NodeB, eNodeB (eNB), next-generation NodeB (gNB), or other suitable terms. NEs 102 and UEs 104 may communicate via a communication link, which may be a wireless or wired connection. For example, NEs 102 and UEs 104 may perform wireless communication (e.g., receive signaling, transmit signaling) via a Uu interface.

[0047] NE 102 can provide a geographic coverage area within which it can support services for one or more UEs 104. For example, NE 102 and UE 104 can support wireless communication of signals associated with services (e.g., voice, video, packet data, messaging, broadcasting, etc.) based on one or more radio access technologies. In some embodiments, NE 102 can be mobile, for example, a satellite associated with a non-terrestrial network (NTN). In some embodiments, different geographic coverage areas associated with the same or different radio access technologies may overlap, but different geographic coverage areas may be associated with different NEs 102.

[0048] One or more UEs 104 may be distributed across a geographical area of ​​the wireless communication system 100. UE 104 may include or be referred to as a remote unit, mobile device, wireless device, remote device, subscriber device, transmitter device, receiver device, or some other suitable term. In some implementations, UE 104 may be referred to as a unit, station, terminal, or client, and other instances thereof. Additionally or alternatively, UE 104 may be referred to as an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or a Machine Type Communication (MTC) device, and other instances thereof.

[0049] UE 104 may be able to support direct wireless communication with other UE 104 via a communication link. For example, UE 104 may support direct wireless communication with another UE 104 via a device-to-device (D2D) communication link. In some implementations, such as vehicle-to-vehicle (V2V) deployments, vehicle-to-everything (V2X) deployments, or cellular-V2X deployments, the communication link may be referred to as a sidelink. For example, UE 104 may support direct wireless communication with another UE 104 via a PC5 interface.

[0050] NE 102 may support communication with CN 106 or with another NE 102, or both. For example, NE 102 may interface with other NE 102 or CN 106 via one or more backhaul links (e.g., S1, N2, N6, or other network interfaces). In some embodiments, NE 102 may communicate directly with each other. In some other embodiments, NE 102 may communicate indirectly with each other (e.g., via CN 106). In some embodiments, one or more NE 102 may include sub-components, such as access network entities, which may be instances of Access Node Controllers (ANCs). The ANC may communicate with one or more UE 104s via one or more other access network transmitting entities (which may be referred to as radio heads, smart radio heads, or transmit-receive points (TRPs)).

[0051] CN 106 can support user authentication, access authorization, tracking, connectivity, and other access, routing, or mobility functions. CN 106 can be an evolved packet core (EPC) or a 5G core (5GC), which may include control plane entities (e.g., Mobility Management Entity (MME), Access and Mobility Management Function (AMF)) that manage access and mobility, and user plane entities (e.g., Serving Gateway (S-GW), Packet Data Network (PDN) Gateway (P-GW), or User Plane Function (UPF)) that route packets or interconnect to external networks. In some implementations, the control plane entities may manage non-access stratum (NAS) functions of one or more UEs 104 served by one or more NEs 102 associated with CN 106, such as mobility, authentication, and bearer management (e.g., data bearers, signaling bearers, etc.).

[0052] CN 106 can communicate with the packet data network via one or more backhaul links (e.g., via S1, N2, N6, or other network interfaces). The packet data network may contain an application server. In some implementations, one or more UEs 104 can communicate with the application server. UE 104 can establish a session (e.g., a Protocol Data Unit (PDU) session, etc.) with CN 106 via NE 102. CN 106 can use the established session (e.g., an established PDU session) to route services (e.g., control information, data, etc.) between UE 104 and the application server. A PDU session can be an instance of a logical connection between UE 104 and CN 106 (e.g., one or more network functions of CN 106).

[0053] In the wireless communication system 100, NE 102 and UE 104 can use the resources of the wireless communication system 100 (e.g., time resources (e.g., symbols, time slots, subframes, frames, etc.) or frequency resources (e.g., subcarriers, carriers)) to perform various operations (e.g., wireless communication). In some embodiments, NE 102 and UE 104 may support different resource structures. For example, NE 102 and UE 104 may support different frame structures. In some embodiments, such as in 4G, NE 102 and UE 104 may support a single frame structure. In some other embodiments, such as in 5G and other suitable radio access technologies, NE 102 and UE 104 may support various frame structures (i.e., multiple frame structures). NE 102 and UE 104 may support various frame structures based on one or more parameter sets.

[0054] The wireless communication system 100 may support one or more parameter sets, and the parameter sets may include subcarrier spacing and cyclic prefixes. A first parameter set (e.g., μ=0) may be associated with a first subcarrier spacing (e.g., 15 kHz) and a regular cyclic prefix. In some embodiments, the first parameter set (e.g., μ=0) associated with the first subcarrier spacing (e.g., 15 kHz) may utilize one time slot per subframe. A second parameter set (e.g., μ=1) may be associated with a second subcarrier spacing (e.g., 30 kHz) and a regular cyclic prefix. A third parameter set (e.g., μ=2) may be associated with a third subcarrier spacing (e.g., 60 kHz) and a regular cyclic prefix or an extended cyclic prefix. A fourth parameter set (e.g., μ=3) may be associated with a fourth subcarrier spacing (e.g., 120 kHz) and a regular cyclic prefix. A fifth parameter set (e.g., μ=4) may be associated with a fifth subcarrier spacing (e.g., 240 kHz) and a regular cyclic prefix.

[0055] Time intervals for resources (e.g., communication resources) can be organized according to frames (also known as radio frames). Each frame may have a duration, for example, 10 milliseconds (ms). In some embodiments, each frame may contain multiple subframes. For example, each frame may contain 10 subframes, and each subframe may have a duration, for example, 1 ms. In some embodiments, each frame may have the same duration. In some embodiments, each subframe of a frame may have the same duration.

[0056] Alternatively, the time intervals of resources (e.g., communication resources) can be organized according to time slots. For example, a subframe may contain a certain number (e.g., quantity) of time slots. The number of time slots in each subframe may also depend on one or more parameter sets supported in the wireless communication system 100. For example, the first, second, third, fourth, fifth, sixth, and seventh parameter sets (i.e., μ=0, μ=1, μ=2, μ=3, μ=4, μ=5, μ=6) associated with corresponding subcarrier intervals of 15 kHz, 30 kHz, 60 kHz, 120 kHz, 240 kHz, 480 kHz, and 960 kHz can respectively utilize one time slot per subframe, two time slots per subframe, four time slots per subframe, eight time slots per subframe, 16 time slots per subframe, 32 time slots per subframe, and 64 time slots per subframe. Each time slot may contain a certain number (e.g., quantity) of symbols (e.g., orthogonal frequency division multiplexing (OFDM) symbols). In some implementations, the number (e.g., quantity) of time slots in a subframe may depend on a parameter set. For a regular cyclic prefix, a time slot may contain 14 symbols. For an extended cyclic prefix (e.g., applicable to a 60 kHz subcarrier spacing), a time slot may contain 12 symbols. The relationship between the number of symbols per time slot for regular and extended cyclic prefixes, and between the number of time slots per subframe and the number of time slots per frame, may depend on the parameter set. It should be understood that references to a first parameter set (e.g., μ=0) associated with a first subcarrier spacing (e.g., 15 kHz) may be used interchangeably between subframes and time slots.

[0057] In the wireless communication system 100, the electromagnetic (EM) spectrum can be divided into various categories, frequency bands, channels, etc., based on frequency or wavelength. For example, the wireless communication system 100 can support one or more operating frequency bands, such as within frequency ranges named Frequency Range 1 (FR1) (410 MHz to 7.125 GHz) and Frequency Range 2 (FR2) (24.25 GHz to 71 GHz). In some embodiments, NE 102 and UE 104 can perform wireless communication on one or more of the operating frequency bands. In some embodiments, FR1 can be used by NE 102 and UE 104, along with other equipment or devices, for cellular communication services (e.g., control information, data). In some embodiments, FR2 can be used by NE 102 and UE 104, along with other equipment or devices, for short-range, high data rate capabilities.

[0058] FR1 may be associated with one or more parameter sets (e.g., at least three parameter sets). For example, FR1 may be associated with a first parameter set containing a 15 kHz subcarrier spacing (e.g., μ=0); a second parameter set containing a 30 kHz subcarrier spacing (e.g., μ=1); and a third parameter set containing a 60 kHz subcarrier spacing (e.g., μ=2). FR2 may be associated with one or more parameter sets (e.g., at least two parameter sets). For example, FR2 may be associated with a third parameter set containing a 60 kHz subcarrier spacing (e.g., μ=2); and a fourth parameter set containing a 120 kHz subcarrier spacing (e.g., μ=3).

[0059] According to the implementation scheme, one or more of NE 102 and UE 104 can operate to implement various aspects of the technology described with reference to this disclosure. For example, NE 102 (e.g., a base station) can transmit signaling (e.g., an SSB) indicating whether NE 102 supports on-demand SIB1 transmission. UE 104 can receive the signaling and determine whether to execute an on-demand SIB1 request. When it is determined that on-demand SIB1 transmission is available, UE 104 can determine the requested resources for transmitting the on-demand SIB1 request. For example, the requested resources can be determined based on resources on which SSB transmissions are received and / or based on PCID and / or MIB or PBCH content. UE 104 can request SIB1 transmission and NE 102 can transmit SIB1 to enable UE 104 to obtain connectivity to NE 102 for wireless communication.

[0060] Emissions and energy consumption from various components of telecommunications systems have adverse climate impacts. Furthermore, the operating costs of running telecommunications services are substantial. In wireless communication systems, efforts to shape efficiency are rooted in several industry-specific factors aimed at addressing rising network costs. The continued growth of mobile data services is underway, estimated at 6.4 gigabytes per user per month in 2019 and projected to triple per user over the next five years. Combined with rising costs of spectrum, capital investment, and ongoing RAN maintenance / upgrades, energy-saving measures in network operations are likely to emerge. 5G New Radio (NR) offers significant improvements in energy efficiency per gigabyte compared to previous generations of mobility. However, 5G use cases and the adoption of millimeter waves will require more sites and antennas. This leads to the prospect of more efficient networks potentially resulting in higher emissions.

[0061] Research on network power efficiency in NR demonstrates the need for energy conservation [3GPP Technical Report (TR) 38.864]. This research shows that network power efficiency is crucial for environmental sustainability, reducing environmental impact (greenhouse gas emissions), and saving operating costs. With the increasing adoption of 5G across industries and geographic regions (involving the handling of more advanced services and applications requiring high data rates, such as XR), networks are becoming denser, using more antennas, greater bandwidth, and more frequency bands.

[0062] Energy consumption has become a critical component of operators' operating costs. According to some estimates, energy costs on mobile networks account for approximately 23% of total operator costs. The majority of energy consumption originates from the radio access network, and specifically from active antenna units (AAUs), with data centers and fiber optic transmission accounting for a smaller share. The power consumption of radio access can be divided into two parts: a dynamic component, which is consumed while data transmission / reception is in progress; and a static component, which is continuously consumed even when data transmission / reception is not in progress to maintain the operation of the radio access equipment.

[0063] Therefore, it is necessary to research and develop network energy consumption models (UE power consumption models are defined in TR38.840), KPIs, and evaluation methods, especially for base stations, and to identify and study network energy-saving technologies in target deployment scenarios. The research explores how to utilize potential support / feedback from UEs, potential UE auxiliary information, and information exchange / coordination on network interfaces to dynamically and / or semi-statically achieve more efficient operation and finer-grained adaptation in one or more of the network energy-saving technologies in the time, frequency, spatial, and power domains.

[0064] The study not only assesses potential network energy consumption gains, but also evaluates and balances the impact on network and user performance, for example by looking at KPIs such as spectral efficiency, capacity, user-aware throughput (UPT), latency, UE power consumption, complexity, handover performance, call drop rate, initial access performance, and service level agreement (SLA) guarantee-related KPIs.

[0065] The UE can transmit PRACH to achieve UE-NE connectivity. In 5G, PRACH involves preamble transmission, where the UE selects a random access preamble from a set of predefined preambles. These preambles can be broadly categorized into two types: short preambles and long preamble formats. The UE also selects a random sequence number for the preamble. After selecting the preamble and sequence number, the UE transmits the preamble on the PRACH.

[0066] Regarding the Synchronization Signal / PBCH Block (SS / PBCH Block), cell search is a procedure for the UE to obtain time and frequency synchronization with a cell and detect the cell's PCID. During cell search operations performed when the UE powers on, during connected mode mobility, during idle mode mobility (e.g., reselection), and during inter-RAT mobility to the NR system, the UE uses the NR synchronization signal and PBCH to derive information for accessing the cell. Similar to LTE, two types of synchronization signals are defined for NR: PSS and SSS. The Synchronization Signal / PBCH Block (SS / PBCH Block; also known as SSB) consists of the PSS, SSS, and Physical Broadcast Channel (PBCH). The synchronization signal can also be used by the UE for Reference Signal Received Power (RSRP) and Reference Signal Received Quality (RSRQ) measurements.

[0067] Regarding PCID, 5G NR defines 1008 unique PCIDs, which are divided into 336 unique groups, each group consisting of three distinct identifiers. The PCID of a cell can be calculated using the following methods:

[0068] NIDCell = 3 NID(1) + NID(2), where NID(1) ∈ {0,1, … ,335} and NID(2) ∈{0,1,2}

[0069] The UE can derive NID(1) from SSS and NID(2) from PSS, where NID = network identifier and NIDCell is PCID.

[0070] Figure 2 The time and frequency structure 200 of the SS / PBCH block is described. In time and frequency structure 200, the PSS, SSS, and PBCH are together in consecutive OFDM symbols, and each SS / PBCH block occupies 4 OFDM symbols in the time domain and spans 240 subcarriers (20 RBs) in the frequency domain. Furthermore, the PSS occupies the first OFDM symbol and spans 127 subcarriers, and the SSS is located in the third OFDM symbol and spans 127 subcarriers. There are 8 unused subcarriers below the SSS and 9 unused subcarriers above the SSS. The PBCH occupies two complete OFDM symbols (the second and fourth) spanning 240 subcarriers, and a third OFDM symbol spanning 48 subcarriers above and below the SSS. This results in the PBCH occupying 576 subcarriers across three OFDM symbols (240+48+48+240=576). The PBCH demodulation reference signal (DM-RS) occupies 144 REs, which is one-quarter of the total REs, and the remaining REs are used for the PBCH payload (576-144=432 REs).

[0071] Table 1 presents a summary of the frequency resources occupied by the SS / PBCH block, including the PSS, SSS, PBCH, and DM-RS used for the PBCH. The complex value symbol corresponding to the resource element marked 'set to 0' in Table 1 is set to zero. As can be seen from Table 1, the location of the PBCH DM-RS depends on the cell's PCID (v = NIDcell mod 4), for example, the PCID determined by the UE using the PSS / SSS.

[0072] Table 1

[0073]

[0074] Regarding the details of SSB in the time domain, each SS / PBCH block spans four OFDM symbols in the time domain and is periodically transmitted at intervals of 5 ms, 10 ms, 20 ms, 40 ms, 80 ms, or 160 ms. While longer SS / PBCH block intervals enhance network energy performance, shorter intervals facilitate faster cell search for the UE. During initial cell search or idle-mode mobility, the UE can assume a default interval of 20 ms.

[0075] Regarding SS burst sets, SS burst sets are defined to enable beam scanning for PSS / SSS and PBCH. An SS burst set contains a group of SS / PBCH blocks, and each SS / PBCH block can be transmitted on a different beam. Furthermore, an SS burst set can contain one or more SS / PBCH blocks. The SS / PBCH blocks in the SS burst set are transmitted in a time-division multiplexing manner, and the SS burst set can be constrained to a 5 ms window and located in the first or second half of a 10 ms radio frame. The network sets the periodicity of the SS / PBCH blocks via the RRC parameter ssb-PeriodicityServingCell, which can take values ​​within the range {5ms, 10ms, 20ms, 40ms, 80ms, 160ms}. The maximum number of candidate SS / PBCH blocks (Lmax) within an SS burst set depends on the carrier frequency / band, as shown in Table 2 below.

[0076] Table 2

[0077]

[0078] Within a 5 ms half-frame, the starting OFDM symbol index of the candidate SS / PBCH block in the SS burst set depends on the subcarrier spacing (SCS) and carrier frequency / band summarized in Table 3 below. For complete details, please refer to Section 4.1 of 3GPP Technical Specification (TS) 38.213.

[0079] Table 3

[0080]

[0081] It should be noted that when the network does not use beamforming, it can transmit an SS / PBCH block and therefore there may be an SS / PBCH block start position.

[0082] Figure 3 and 4 Example 300 illustrates the timing of candidate SS / PBCH blocks within an SS burst set. For example, Example 300 is for the case where SCS = 15 kHz and the carrier frequency is between 3 GHz and 6 GHz.

[0083] Figure 5 Example program 500 illustrates the use of MIB and SIB transmissions and relationships within SIBs. For example, program 500 illustrates communication between NE 102 and UE 104.

[0084] The following describes some characteristics of the MIB. For further details on MIB scheduling, please refer to TS 38.331-5.2.1 and TS38.213-4.1. The MIB can be transmitted via the Broadcast Channel (BCH) / PBCH. The PBCH is transmitted as part of the SSB. The MIB can be transmitted periodically for 80 ms, and retransmissions can occur within these 80 ms. For initial cell selection, the UE may assume that half-frames with SS / PBCH blocks occur periodically in 2-frame intervals. The MIB may contain parameters for decoding SIB1.

[0085] The following describes an example implementation of MIB:

[0086]

[0087] The field `subCarrierSpacingCommon` indicates the subcarrier spacing for SIB1 and Msg.2 / 4 used in the Initial Access and System Information (SI) messages. The interpretation of this value varies depending on the frequency range, as summarized in Table 4.

[0088] Table 4

[0089]

[0090] The field ssb-subcarrierOffset corresponds to k_ssb (see, for example, TS 38.213). This field indicates the frequency domain offset between the SSB and the overall resource block grid in terms of the number of subcarriers. If a value higher than 15 is available for k_ssb, it is represented by a combination of the PBCH data field and ssb-subcarrierOffset. The field dmrs-TypeA-Position indicates the position of the (first) DL DM-RS. The field pdcchConfigSIB1 determines the bandwidth, common ControlResourceSet (CORESET), common search space, and PDCCH parameters of the Physical Downlink Control Channel (PDCCH) / SIB. This corresponds to the Residual Minimal System Information (RMSI) RMSI-PDCCH-Config.

[0091] The following describes the characteristics of SIB1 in, for example, a 5G implementation scheme. SIB1 can be transmitted via DL-SCH (Note: SIB1 is the first RRC message besides MIB). SIB1 can be transmitted periodically for 160 ms and can be repeatedly transmitted within this 160 ms. SIB1 contains information about the availability and scheduling (e.g., periodicity, SI window size) of other SIBs. SIB1 indicates whether other SIBs are provided on a periodic broadcast basis or on an on-demand basis. If other SIBs besides SIB1 are provided on demand, then SIB1 may contain information for the UE to perform an SI request.

[0092] Therefore, the implementation schemes described herein provide solutions for implementing on-demand requesting and transmission of SIB1, such as achieving energy savings on both the network and UE sides. For example, the described techniques provide methods for determining whether on-demand SIB1 is available and for identifying resources for requesting on-demand SIB1 transmission.

[0093] Figure 6 This document describes a method 600 for obtaining on-demand SIB1 according to aspects of this disclosure. For example, method 600 represents an embodiment described in this disclosure, such as an overview of the embodiments detailed below. Operation of the method can be implemented by a UE as described herein. In some embodiments, the UE can execute a set of instructions to control functional elements of the UE to perform the described functions. It should be noted that the methods described herein describe possible embodiments, and the operation and steps can be rearranged or otherwise modified, and other embodiments are possible.

[0094] At 602, the method may include determining the availability of on-demand SIB1 requests. The operation of 602 may be performed according to instances as described herein. In some embodiments, aspects of the operation of 602 may be as referenced... Figure 7The UE execution described.

[0095] At 604, the method may include determining the resource for the SIB1 request. The operation of 604 may be performed according to the examples described herein. In some embodiments, aspects of the operation of 604 may be as described in references... Figure 7 The UE execution described.

[0096] At 606, the method may include issuing an SIB1 request using the determined resources. The operation of 606 may be performed according to the examples described herein. In some embodiments, aspects of the operation of 606 may be as described in references... Figure 7 The UE execution described.

[0097] At 608, the method may include acknowledgment of receiving the SIB1 request. The operation of 608 may be performed according to the examples described herein. In some embodiments, aspects of the operation of 608 may be as described in references... Figure 7 The UE execution described.

[0098] At 610, the method may include receiving a transmission of SIB1. Operation of 610 may be performed according to the examples described herein. In some embodiments, aspects of operation of 610 may be as described in references... Figure 7 The UE execution described.

[0099] In the implementation, the UE determines the cell's PCID from the SSB. For example, the SSB includes components such as the PSS, SSS, PBCH including the MIB, etc. In at least one instance, the PCID can be determined from the detected PSS and / or SSS sequence ID. The PCID and / or PCID range can be predetermined to enable the UE to transmit on-demand SIB1 transmit requests on the cell. For example, PCID pattern 'N' can be used to determine a custom PCID configured to signal the availability of on-demand SIB1 transmits. In an example, if N=100, then PCIDs 100, 200, 300…1000 represent custom PCIDs. In another instance of using and determining the PCID as a custom PCID, the custom PCID can be associated with a PSS sequence identifier (ID). For example, in NR, the PSS sequence ID can be {0, 1, 2}. For example, if the UE detects a PSS sequence ID of 2, then the UE is allowed to transmit an on-demand SIB1 transmit request on the cell. The determination of the PCID and / or PCID can be specified, including parameters used for this determination.

[0100] In the implementation scheme, when the UE determines that the cell has a custom PCID, it can initiate an on-demand SIB1 request. This request can be implemented by initiating a PRACH procedure, where PRACH resources (e.g., preamble and / or time-frequency resources) can be reserved for the on-demand SIB1 request. Alternatively or further, the request can be implemented by initiating a contention-based PRACH (CBRA) procedure and transmitting an RRC request or a New Media Access Control (MAC) element (CE) via the received grant in Msg2 to request SIB1 for the current cell.

[0101] In the implementation scheme, after determining the customized PCID, the UE may first attempt to obtain SIB1 as in a traditional scenario, for example, from a cell that regularly transmits (e.g., broadcasts) SIB1. If SIB1 is not received after 't' ms and / or 'a' attempts, the UE may be allowed to request SIB1 on an on-demand basis. The parameters 't' ms and / or 'a' attempts may be specified with default values, which can be configured and stored from previous cells (e.g., in the same RAN area), and / or can be configured and stored from SIB1 previously received from the same cell.

[0102] The implementation scheme can also be used to allow operators (e.g., operators configuring the wireless communication system of the NE) to use custom PCIDs as regular PCIDs and allow another operator to use these as custom PCIDs, enabling the UE to request SIB1 on an on-demand basis.

[0103] In the implementation plan, when the operator intends to use a customized PCID to enable the UE to request SIB1 on an on-demand basis, the cellBarred information element (IE) included in the MIB can be set to "barred". The following shows an example MIB content:

[0104]

[0105] Table 5 below provides descriptions of some example MIB fields.

[0106] Table 5

[0107]

[0108]

[0109] In the implementation plan, UEs with SIB1 on-demand acquisition capability that detect a custom PCID and have the cellBarred IE included in the MIB set to "barred" can continue to request SIB1 on an on-demand basis. UEs not configured to request on-demand SIB1 can treat the cell as blocked. Operators that periodically transmit (e.g., broadcast) SIB1 can continue to use the custom PCID as a regular PCID and set the cellBarred IE included in the MIB to "notBarred".

[0110] In some scenarios, operators may continue to use a custom PCID as a regular PCID, but for specific reasons (e.g., cell maintenance), the cell may need to be disabled, and therefore the cellBarred IE included in the MIB will need to be set to "barred". Operators may receive unnecessary SIB1 requests. This could waste UE battery power because the cell is unusable at this time, and therefore SIB1 acquisition cannot generate successful cell connectivity.

[0111] Therefore, in the implementation, operators using on-demand SIB1 transmission (e.g., irregularly broadcast SIB1) may perform one or more of the following: define SSB transmission (CD-SSB) for the cell using one of the custom PCIDs in the SSB; set the cellBarred IE included in the MIB to “barred”; and / or use the field ssb-SubcarrierOffset to indicate that the cell does not provide SIB1. This can be achieved by targeting FR1 pairs referred to as k SSB The parameter (or k_ssb) (defined in TS 38.213) is completed using a value higher than 23 or a value higher than 11 for FR2. k can be used. SSB Specific values, for example, 30 for FR1 and 14 for FR2. SSB The number of subcarriers can indicate the frequency domain offset between the SSB and the overall resource block grid. If k_ssb can use a value higher than 15, it can be represented by a combination of the PBCH data field and ssb-subcarrierOffset. After determining that the above conditions are true, the UE can initiate an on-demand SIB1 request.

[0112] Operators that regularly broadcast SIB1 and use a custom PCID as a regular PCID may do one or more of the following (a) and / or (b):

[0113] (a) When a cell is about to be blocked, the cellBarred IE included in the MIB is set to "barred," but the ssb-SubcarrierOffset field can be used to indicate that the cell provides (e.g., broadcasts) SIB1. UEs with on-demand SIB1 capability can determine that the cell provides SIB1 periodically (e.g., broadcasts SIB1) and avoid requesting SIB1 on demand, but will not attempt to access the cell because it is considered blocked. UEs without on-demand SIB1 capability may not attempt to access the cell because it is considered blocked. Certain UEs with specific characteristics (such as Reduced Capability (REDCAP) UEs, Network Energy Saving (NES) UEs, and / or UEs with Non-Terrestrial Network (NTN) capability that intentionally or unintentionally access NTN) can continue to receive SIB1 to determine whether such cells are actually blocked.

[0114] (b) Do not use a custom PCID for non-cell-defined SSBs. For CD-SSBs, if a custom PCID is to be used, the operator can set the cellBarred IE included in the MIB to "notBarred" when the cell is operating normally. In this case, the ssb-SubcarrierOffset field is used to indicate that the cell provides (e.g., broadcast) SIB1 and the UE can therefore determine the common ControlResourceSet (CORESET), common search space, and PDCCH parameters.

[0115] Operators that broadcast SIB1 irregularly may perform one or more of the following (a) and / or (b):

[0116] (a) Using k SSB A value of 30 (for FR1) or a value of 14 (for FR2) indicates that SIB1 is provided on an on-demand basis. UEs without on-demand SIB1 capability can determine that SIB1 is not broadcast. In this case, the pdcch-ConfigSIB1 field can indicate where the UE can find (or may not find) a frequency location with an SS / PBCH having a CORESET and search space for SIB1 (see, for example, TS 38.213, Clause 13). UEs with on-demand SIB1 capability can directly base their SIB1 service on k... SSB A value of 30 (for FR1) or a value of 14 (for FR2) and / or combined with the custom PCID and / or cellBarred in the MIB determines that SIB1 will be requested.

[0117] (b) Various combinations of the above can also be used.

[0118] In the implementation, the UE can determine whether it is permitted to transmit SIB1 transmit requests to the cell on demand from the SSB of the cell (e.g., from the MIB and / or PBCH payload). Therefore, the MIB and / or PBCH may contain bits and / or IEs indicating whether the 'SIB1 transmit request' is permitted. This indication may be provided, for example, using alternative values ​​available in the MIB.

[0119] In the implementation plan, assuming regular and / or periodic SIB1 broadcasts, a UE without on-demand SIB1 capability may attempt to acquire SIB1 from the cell, and after a threshold time and / or threshold number of SIB1 acquisition attempts, the cell may be blocked for up to 300 seconds. To prevent such scenarios, a configurable timer value can be used to prevent the UE from repeatedly attempting to acquire SIB1. For example, a timer value can be used from pdcch-ConfigSIB1 and k... SSB The combination of obtained code points is used to send a signal to notify the timer value.

[0120] The embodiments described in this disclosure also provide for determining the resources (e.g., radio resources) used to transmit on-demand SIB1 requests. In the following, the term PRACH resource should be understood to encompass a variety of different resources, including time resources, frequency resources, PRACH transmission preamble IDs, etc.

[0121] In the implementation scheme, the UE transmits a "first signal" in response to an on-demand SIB1 request. For example, the UE may determine a PRACH resource associated with the first signal in which the UE detects the transmission of an SSB.

[0122] In the implementation scheme, the UE determines the frequency resources of the first signal based on the resources in which the UE has received SSB transmissions. For example, an SSB is characterized by one or more of the following elements transmitted by the NE (see the Background section for a detailed description of SSBs and their contents): synchronization signals, such as PSS and / or SSS; PBCH, which may contain the cell's MIB; and DM-RS.

[0123] In at least one instance, the frequency resource of the first signal can be determined relative to a frequency reference point (e.g., “point F”). In this instance, point F may be the lowest subcarrier in which one of the SSB and / or its components (e.g., PBCH, PSS, and / or SSS) is detected. For example, see “Time and Frequency Structure of SS / PBCH Blocks” discussed above, where point F may be equivalent to subcarrier number 0 of the SSB (see also...). Figure 2 ).

[0124] In the implementation scheme, the transmission of the first signal will be aligned with a resource block grid, where, in the frequency domain, a resource block consists of multiple subcarriers. In at least one instance, the UE may assume that point F coincides with the resource block grid. For example, the UE may assume that the lowest subcarrier used to transmit the first signal is the same subcarrier identified by point A. Point A is a logical point in the frequency such that the positions of different bandwidth portions (BWPs) are determined with a non-negative offset relative to point A. The BWP concept allows the network to configure different operating bandwidths for different UEs within the overall carrier bandwidth. From the cell's perspective, there exists a common resource block (CRB) grid relative to a common point in the frequency referred to as point A. Specifically, point A is the frequency position of the first subcarrier of a common resource block CRB0 for subcarrier spacing.

[0125] In some implementations, the SSB transmission (e.g., point F) may not be aligned with the resource block grid. In such implementations, a subcarrier offset can be used between point F and the resource block grid. Therefore, the subcarrier offset can be implemented in various ways. For example, the subcarrier offset can be a fixed value. Alternatively or additionally, the subcarrier offset can be indicated by and / or determined from information contained in the SSB (e.g., in the MIB).

[0126] According to at least one implementation scheme, the subcarrier offset can be determined according to the following procedure: the subcarrier offset is determined from the value k. SSB (See TS 38.213) to determine, for example, for FR1, (or a subset of these values) or for FR2, (or a subset of these values). Different k from the corresponding range SSB The value can be associated with different subcarrier offsets. In the FR1 example, the subcarrier offset (in units of subcarriers) can be determined as in FR1. Or in FR2 In another instance, the subcarrier offset can be determined based on lookup tables for FR1 and FR2. For example, Table 6 below presents example subcarrier offset values ​​for FR1 and Table 7 below presents example subcarrier offset values ​​for FR2.

[0127] Table 6

[0128]

[0129] Table 7

[0130]

[0131] According to NR version 18, the value in FR1 and and the value in FR2 and It has been used for different purposes. Therefore, in FR1 and FR2 These values ​​can be used to indicate subcarrier offset. They can indicate one or more of the bits or fields contained in the MIB used to determine the subcarrier offset. According to the implementation, if FR1... Or in FR2 Then one or more of controlResourceSetZero and searchSpaceZero (included in pdcch-ConfigSIB1) determine the subcarrier offset. In such cases, it can be assumed that the original controlResourceSetZero and searchSpaceZero have fixed or pre-configured values, such as default values.

[0132] According to the implementation plan, the UE can determine two different time instances in two different time instances received by the PBCH. Value. If the two time instances are no more than a certain duration apart, then the UE can interpret this so that the cell is based on both the first PBCH (including) and the value. The reception of the first value provides periodic SIB1 transmission (e.g., SIB1 broadcast), and according to the second PBCH (containing The reception of the second value of the PBCH provides the UE with an opportunity to request the transmission of SIB1. According to the implementation scheme, the specific duration is an integer fraction of the basic periodic interval of the PBCH transmission. The basic periodic interval of the PBCH transmission can be an interval during which the UE can assume that the MIBs contained in the PBCH are static (e.g., unchanging). For example, if the basic periodic interval of the PBCH transmission is 160 ms, then the specific duration can be one of {1; 2; 4; 5; 8; 10; 16; 20; 32; 40; 80; 160} ms.

[0133] In the implementation scheme, the UE determines the resources (e.g., PRACH resources) for the first signal based on indications detected during SSB transmission. In at least one instance, the UE determines the PRACH resources based on a detected PCID. For example, the PCID can be determined from a combination of detected PSS and SSS sequences, e.g. ,in It is a value within [0;335] and This corresponds to the PSS exponent, for example, a value from {0;1;2}.

[0134] In at least one instance, if the PCID is even, the UE determines the first PRACH timing (e.g., in the frequency domain), and if the PCID is odd, the UE determines the second PRACH timing (e.g., in the frequency domain). In at least one instance, the UE determines the timing for the first detected PSS index value (e.g., for...). Determine the first PRACH timing in the frequency domain, for the second detected PSS index value (e.g., for the...). Determine the second PRACH timing in the frequency domain, and for the third detected PSS index value (e.g., for...). Determine the timing of the third PRACH in the frequency domain.

[0135] In at least one instance, the UE determines the PRACH timing in the frequency domain as follows: Regarding the determination For details, please refer to TS 38.211 v19.0.0, such as Clause 6.3.3.2 and Table 6.3.3.2-1.

[0136] In at least one instance, the MIB and / or PBCH contain information indicating resources used for the first signal transmission. For example, one value of the information indicates that the UE will not transmit the first signal, e.g., it will not transmit a request for SIB1 transmission. In at least one instance, a preamble index (also referred to as the random access preamble ID) is associated with a PCID. Transmitting the associated preamble may imply a request for SIB1 transmission to the PCID associated with the preamble.

[0137] In the implementation scheme, the UE determines the PRACH configuration index based on information contained in the MIB or PBCH (e.g., based on the PCID). In 5G NR, the tables defining the PRACH configuration index are given in Tables 6.3.3.2-2 to 6.3.3.2-4 of TS 38.211 v19.1.0.

[0138] According to at least one implementation, the UE determines the PRACH configuration index for transmitting a request to SIB1 from a subset of a set of PRACH configuration indices.

[0139] In at least one instance, the subset is formed by PRACH configuration indexes that share the same preamble format (e.g., preamble format 0).

[0140] In at least one instance, the subset is formed by PRACH configuration indexes that share the same number of subframes. For example, according to Table 6.3.3.2-2, the PRACH configuration index is {0-18, 28-46, 53-77, 88, 90, 93, 95-98, 101-102, 109-110, 113-114, 118, 120, 122, 124-127, 130-131, 138-139, 142-143, 148, 150, 152, 154-157, 160-161, 168-169, 172-173, 178, 180, 183, 185-188, 191-192, 199, 201, 203, 206-211,} The following sets define a subframe: 219, 221, 223-226, 229-230, 237, 239, 241, 243-246, 249-250, and these configuration indices can form subsets.

[0141] In at least one instance, a subset is formed by PRACH configuration indices that share the same subframe number. For example, according to Table 6.3.3.2-2, the PRACH configuration indices {87, 89, 91-92, 94, 100, 108, 112, 129, 141, 147, 149, 151, 159, 171, 177, 179, 181-182, 184, 190, 198, 200, 202, 204-205, 214, 220, 222, 228, 236, 238, 240, 248} define subframes 4 and 9, and these configuration indices can form subsets.

[0142] In at least one instance, a subset is formed by PRACH configuration indexes that share the same start symbol. For example, according to Table 6.3.3.2-4, the PRACH configuration indexes {41, 43-44, 48, 50, 52, 54-55, 58} define the start symbol 5, and these configuration indexes can form a subset.

[0143] In at least one instance, a subset is formed by PRACH configuration indices of the same number of PRACH slots within a shared subframe. For example, according to Table 6.3.3.2-3, PRACH configuration indices {0-66, 256-262} do not define the number of PRACH slots within a subframe, and these configuration indices can form subsets.

[0144] In at least one instance, a subset is formed by PRACH configuration indices of the same number of time-domain PRACH opportunities within a shared PRACH slot. For example, according to Table 6.3.3.2-3, the PRACH configuration indices {0-66, 256-262} do not define the number of time-domain PRACH opportunities within a PRACH slot, and these configuration indices can form subsets.

[0145] In at least one instance, a subset is formed by PRACH configuration indices that share the same PRACH duration. For example, according to Table 6.3.3.2-3, PRACH configuration indices {145-168} define PRACH duration 12, and these configuration indices can form a subset.

[0146] According to the implementation described herein, the first signal is one or more of the following: a RACH preamble, a Physical Uplink Control Channel (PUCCH) (e.g., a scheduling request), or a wake-up signal. In at least one instance, the MIB contains information specifying whether the UE will determine the resources for the first signal according to one or more of the implementations described herein.

[0147] Figure 7 An example of a UE 700 according to aspects of this disclosure is described. UE 700 may include a processor 702, a memory 704, a controller 706, and a transceiver 708. The processor 702, memory 704, controller 706, or transceiver 708, or various combinations thereof, or various components thereof, may be examples of components for performing the various aspects of this disclosure as described herein. These components may be coupled via one or more interfaces (e.g., operatively, communicatively, functionally, electronically, electrically).

[0148] Processor 702, memory 704, controller 706, or transceiver 708, or various combinations or components thereof, may be implemented in hardware (e.g., a circuit system). The hardware may be a processor, digital signal processor (DSP), application-specific integrated circuit (ASIC), or other programmable logic device, or any combination thereof configured or otherwise supporting components for performing the functions described in this disclosure.

[0149] Processor 702 may include intelligent hardware devices (e.g., a general-purpose processor, DSP, CPU, ASIC, FPGA, or any combination thereof). In some embodiments, processor 702 may be configured to operate memory 704. In some other embodiments, memory 704 may be integrated into processor 702. Processor 702 may be configured to execute computer-readable instructions stored in memory 704 to cause UE 700 to perform various functions of this disclosure.

[0150] Memory 704 may comprise volatile or non-volatile memory. Memory 704 may store computer-readable, computer-executable code containing instructions that, when executed by processor 702, cause UE 700 to perform the various functions described herein. The code may be stored in a non-transitory computer-readable medium, such as memory 704 or another type of memory. Computer-readable medium includes both non-transitory computer storage media and communication media, wherein the communication media includes any media that facilitates the transfer of a computer program from one place to another. Non-transitory storage media may be any available media accessible by a general-purpose or special-purpose computer.

[0151] In some implementations, processor 702 and memory 704 coupled to processor 702 may be configured to cause UE 700 to perform one or more of the functions described herein (e.g., processor 702 executing instructions stored in memory 704). For example, processor 702 may support wireless communication at UE 700 according to examples disclosed herein.

[0152] UE 700 may be configured or operable to support components for: receiving an SSB; and transmitting an SIB1 request at least in part based on the SSB, the SSB containing a cell identifier configured for on-demand SIB1 transmission.

[0153] In addition, the UE 700 may be configured to support any or a combination of the following: wherein the cell identifier includes a PCID; the SSB includes a PSS, an SSS, and a PBCH including a MIB; determining that the MIB contains an indication that cell access is prohibited; and transmitting the SIB1 request at least in part based on the cell identifier configured for on-demand SIB1 transmission and the MIB indicating that cell access is prohibited; receiving SIB1 at least in part based on the SIB1 request; the SIB1 request includes a PRACH transmission; the SSB further includes an indication that the transmission of the SIB1 request is permitted; monitoring SIB1 broadcasts; and transmitting the SIB1 request at least in part based on failure to acquire SIB1 after SIB1 broadcast monitoring exceeds a threshold; the SSB includes a PBCH including a MIB, and further includes transmitting the SIB1 request at least in part based on the MIB indicating that the cell associated with the cell identifier does not broadcast SIB1.

[0154] Alternatively, UE 700 may support at least one memory (e.g., memory 704) and at least one processor (e.g., processor 702), the at least one processor being coupled to the at least one memory and configured to enable the UE to receive an SSB; and to transmit an SIB1 request at least in part based on the SSB, the SSB containing a cell identifier configured for on-demand SIB1 transmission.

[0155] In addition, UE 700 may be configured to support any or a combination of the following: wherein the cell identifier includes a PCID; the SSB includes a PSS, an SSS, and a PBCH including a MIB; the at least one processor is configured to cause the UE to: determine that the MIB contains an indication that cell access is prohibited; and to transmit the SIB1 request at least in part based on the cell identifier configured for on-demand SIB1 transmission and the MIB indicating that cell access is prohibited; the at least one processor is configured to cause the UE to receive SIB1 at least in part based on the SIB1 request; the SIB1 request includes a PRACH transmission; the SSB further includes an indication that the transmission of the SIB1 request is allowed; the at least one processor is configured to cause the UE to: monitor SIB1 broadcasts; and to transmit the SIB1 request at least in part based on failure to acquire SIB1 after SIB1 broadcast monitoring exceeds a threshold; the SSB includes a PBCH including a MIB, and wherein the at least one processor is configured to cause the UE to transmit the SIB1 request at least in part based on the MIB indicating that the cell associated with the cell identifier does not broadcast SIB1.

[0156] UE 700 may be configured or operable to support components for: receiving cell-related information from an SSB from a network equipment; and transmitting a first signal to the network equipment on a first resource determined at least in part based on the received SSB, the first signal including an on-demand SIB1 request.

[0157] In addition, the UE 700 may be configured to support any or a combination of the following: receiving SIB1 transmissions at least partially based on the on-demand SIB1 request; transmitting the first signal at least partially based on the SSB, the SSB including a cell identifier configured for on-demand SIB1 transmission; the cell identifier including a PCID; the first resource including a PRACH resource; determining the first resource at least partially based on a second resource, the SSB being received via the second resource; determining the first resource at least partially based on a frequency reference point associated with the reception of the SSB; the frequency reference point including the lowest subcarrier in which the SSB or at least one of one or more components of the SSB is received; determining the first resource at least partially based on a subcarrier offset between the frequency reference point and a resource block grid of the subcarrier; determining the first resource at least partially based on a PCID indicated by the SSB; and determining the first resource at least partially based on one or more of the MIB or PBCH of the SSB.

[0158] Alternatively, UE 700 may support at least one memory (e.g., memory 704) and at least one processor (e.g., processor 702), the at least one processor being coupled to the at least one memory and configured to enable the UE to receive cell-related information from an SSB in a network equipment; and to transmit a first signal to the network equipment on a first resource determined at least in part based on the received SSB, the first signal including an on-demand SIB1 request.

[0159] Furthermore, UE 700 may be configured to support any or a combination of the following: wherein the at least one processor is configured to receive SIB1 transmissions at least partially based on the on-demand SIB1 request; the at least one processor is configured to cause the UE to transmit the first signal at least partially based on the SSB, the SSB including a cell identifier configured for on-demand SIB1 transmission; the cell identifier including a PCID; the first resource including a PRACH resource; the at least one processor is configured to cause the UE to determine the first resource at least partially based on a second resource, the SSB being received via the second resource; the at least one processor is configured to cause the UE to at least partially receive the first signal based on the SSB; The first resource is determined based on a frequency reference point associated with reception of the SSB; the frequency reference point includes the lowest subcarrier in which the SSB or at least one of one or more components of the SSB is received; the at least one processor is configured to cause the UE to determine the first resource at least in part based on a subcarrier offset between the frequency reference point and a resource block grid of the subcarrier; the at least one processor is configured to cause the UE to determine the first resource at least in part based on a PCID indicated by the SSB; the at least one processor is configured to cause the UE to determine the first resource at least in part based on one or more of the MIB or PBCH of the SSB.

[0160] Controller 706 manages the input and output signals of UE 700. Controller 706 can also manage peripheral devices not integrated into UE 700. In some embodiments, controller 706 may utilize an operating system such as iOS®, ANDROID®, WINDOWS®, or other operating systems. In some embodiments, controller 706 may be implemented as part of processor 702.

[0161] In some embodiments, UE 700 may include at least one transceiver 708. In other embodiments, UE 700 may have more than one transceiver 708. Transceiver 708 may represent a wireless transceiver. Transceiver 708 may include one or more receiver chains 710, one or more transmitter chains 712, or a combination thereof.

[0162] Receiver chain 710 may be configured to receive signals (e.g., control information, data, packets) over a wireless medium. For example, receiver chain 710 may include one or more antennas for receiving signals over the air or over a wireless medium. Receiver chain 710 may include at least one amplifier (e.g., a low-noise amplifier (LNA)) configured to amplify the received signal. Receiver chain 710 may include at least one demodulator configured to demodulate the received signal and obtain the transmitted data by reversing the modulation technique applied during signal transmission. Receiver chain 710 may include at least one decoder for decoding the demodulated signal to receive the transmitted data.

[0163] Transmitter chain 712 can be configured to generate and transmit signals (e.g., control information, data, packets). Transmitter chain 712 may include at least one modulator for modulating data onto a carrier signal, preparing the signal for transmission over a wireless medium. The at least one modulator may be configured to support one or more techniques, such as amplitude modulation (AM), frequency modulation (FM), or digital modulation schemes like phase shift keying (PSK) or quadrature amplitude modulation (QAM). Transmitter chain 712 may also include at least one power amplifier configured to amplify the modulated signal to an appropriate power level suitable for transmission over a wireless medium. Transmitter chain 712 may also include one or more antennas for transmitting the amplified signal into the air or wireless medium.

[0164] Figure 8 An example of a processor 800 according to aspects of this disclosure is described. Processor 800 may be an example of a processor configured to perform various operations according to the examples described herein. Processor 800 may include a controller 802 configured to perform various operations according to the examples described herein. Processor 800 may optionally include at least one memory 804, which may be, for example, an L1 / L2 / L3 cache. Additionally or alternatively, processor 800 may optionally include one or more arithmetic logic units (ALUs) 806. One or more of these components may be electronically communicated or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more interfaces (e.g., buses).

[0165] Processor 800 may be a processor chipset and includes a protocol stack (e.g., a software stack) executed by the processor chipset to perform various operations (e.g., receive, acquire, retrieve, transmit, output, forward, store, determine, identify, access, write, read) according to the examples described herein. The processor chipset may include one or more cores, one or more caches (e.g., memory native to the processor chipset (e.g., processor 800) or contained within the processor chipset (e.g., processor 800)) or other memory (e.g., random access memory (RAM), read-only memory (ROM), dynamic RAM (DRAM), synchronous dynamic RAM (SDRAM), static RAM (SRAM), ferroelectric RAM (FeRAM), magnetic RAM (MRAM), resistive RAM (RRAM), flash memory, phase-change memory (PCM), and others).

[0166] Controller 802 can be configured to manage and coordinate various operations of processor 800 (e.g., signaling, receiving, acquiring, retrieving, transmitting, outputting, forwarding, storing, determining, identifying, accessing, writing, and reading) to enable processor 800 to support various operations according to the examples described herein. For example, controller 802 can operate as a control unit of processor 800, generating control signals that manage the operation of various components of processor 800. These control signals include enabling or disabling functional units, selecting data paths, initiating memory accesses, and coordinating operation timing.

[0167] Controller 802 may be configured to fetch (e.g., fetch, retrieve, receive) instructions from memory 804 and determine subsequent instructions to be executed to enable processor 800 to support various operations according to examples described herein. Controller 802 may be configured to track the memory addresses of instructions associated with memory 804. Controller 802 may be configured to decode instructions to determine the operations to be performed and the operands involved. For example, controller 802 may be configured to interpret instructions and determine control signals to be output to other components of processor 800 to enable processor 800 to support various operations according to examples described herein. Additionally or alternatively, controller 802 may be configured to manage data flow within processor 800. Controller 802 may be configured to control data transfers between registers, ALU 806, and other functional units of processor 800.

[0168] Memory 804 may include one or more caches (e.g., memory local to processor 800 or included in processor 800) or other memories, such as RAM, ROM, DRAM, SDRAM, SRAM, MRAM, flash memory, etc. In some embodiments, memory 804 may reside within or on the processor chipset (e.g., local to processor 800). In some other embodiments, memory 804 may reside outside the processor chipset (e.g., remote from processor 800).

[0169] Memory 804 may store computer-readable, computer-executable code containing instructions that, when executed by processor 800, cause processor 800 to perform the various functions described herein. The code may be stored in a non-transitory computer-readable medium, such as system memory or another type of memory. Controller 802 and / or processor 800 may be configured to execute computer-readable instructions stored in memory 804 to cause processor 800 to perform various functions. For example, processor 800 and / or controller 802 may be coupled to or coupled to memory 804, and processor 800 and controller 802 may be configured to perform the various functions described herein. In some instances, processor 800 may include multiple processors, and memory 804 may include multiple memories. One or more of the multiple processors may be coupled to one or more of the multiple memories, which may be individually or collectively configured to perform the various functions described herein.

[0170] One or more ALU 806s may be configured to support various operations according to the examples described herein. In some embodiments, one or more ALU 806s may reside within or on a processor chipset (e.g., processor 800). In some other embodiments, one or more ALU 806s may reside outside the processor chipset (e.g., processor 800). One or more ALU 806s may perform one or more calculations on data, such as addition, subtraction, multiplication, and division. For example, one or more ALU 806s may receive input operands and an opcode that determines the operation to be performed. One or more ALU 806s may be configured with various logic and arithmetic circuitry, including adders, subtractors, shifters, and logic gates, to process and manipulate data according to the operation. Alternatively, one or more ALU 806s may support logical operations such as AND, OR, XOR, NOR, and NAND, enabling one or more ALU 806s to handle conditional operations, comparisons, and bitwise operations.

[0171] Processor 800 may support wireless communication according to examples disclosed herein. Processor 800 may be configured or operable to support at least one controller (e.g., controller 802) coupled to at least one memory (e.g., memory 804) and configured to receive an SSB; and to transmit an SIB1 request at least in part based on the SSB, the SSB containing a cell identifier configured for on-demand SIB1 transmission.

[0172] Furthermore, the processor 800 may be configured or operable to support any or a combination of the following: wherein the cell identifier includes a PCID; the SSB includes a PSS, an SSS, and a PBCH including a MIB; the at least one controller is configured to cause the processor to: determine that the MIB contains an indication that cell access is prohibited; and to transmit the SIB1 request at least in part based on the cell identifier configured for on-demand SIB1 transmission and the MIB indicating that cell access is prohibited; the at least one controller is configured to cause the processor to receive SIB1 at least in part based on the SIB1 request; the SIB1 request includes a PRACH transmission; the SSB further includes an indication that the transmission of the SIB1 request is permitted; the at least one controller is configured to cause the processor to: monitor SIB1 broadcasts; and to transmit the SIB1 request at least in part based on failure to acquire an SIB1 after SIB1 broadcast monitoring exceeds a threshold; the SSB includes a PBCH including a MIB, and wherein the at least one controller is configured to cause the UE to transmit the SIB1 request at least in part based on the MIB indicating that the cell associated with the cell identifier does not broadcast SIB1.

[0173] Processor 800 may support wireless communication according to examples disclosed herein. Processor 800 may be configured or operable to support at least one controller (e.g., controller 802), said at least one controller being coupled to at least one memory (e.g., memory 804) and configured to receive cell-related information from a network equipment in an SSB; and to transmit a first signal to the network equipment on at least part of a first resource determined based on the received SSB, the first signal including an on-demand SIB1 request.

[0174] Furthermore, the processor 800 may be configured or operable to support any or a combination of the following: wherein the at least one controller is configured to cause the processor to receive SIB1 transmissions at least partially based on the on-demand SIB1 request; the at least one controller is configured to cause the processor to transmit the first signal at least partially based on the SSB, the SSB including a cell identifier configured for on-demand SIB1 transmission; the cell identifier including a PCID; the first resource including a PRACH resource; the at least one controller is configured to cause the processor to determine the first resource at least partially based on a second resource, the SSB being received via the second resource; the at least one controller is configured to cause the processor to receive the first signal at least partially based on the SSB; The processor determines the first resource at least in part based on a frequency reference point associated with reception of the SSB; the frequency reference point includes the lowest subcarrier in which the SSB or at least one of one or more components of the SSB is received; the at least one controller is configured to cause the processor to determine the first resource at least in part based on a subcarrier offset between the frequency reference point and a resource block grid of subcarriers; the at least one controller is configured to cause the processor to determine the first resource at least in part based on a PCID indicated by the SSB; the at least one controller is configured to cause the processor to determine the first resource at least in part based on one or more of the MIB or PBCH of the SSB.

[0175] Processor 800 may support wireless communication according to examples disclosed herein. Processor 800 may be configured or operable to support at least one controller (e.g., controller 802) coupled to at least one memory (e.g., memory 804) and configured to cause the processor to transmit an SSB containing an indication of at least a first resource for transmitting an on-demand SIB1 request; receiving the on-demand SIB1 request via the first resource; and transmitting SIB1 at least in part based on the on-demand SIB1 request.

[0176] Furthermore, the processor 800 may be configured or operable to support any or a combination of the following: wherein the SSB includes a cell identifier configured for on-demand SIB1 transmission; the cell identifier includes a PCID; the SSB includes an indication for determining a frequency reference point of the first resource; the frequency reference point includes the lowest subcarrier in which the SSB or at least one of one or more components of the SSB is transmitted; the SSB includes an indication of a subcarrier offset between the frequency reference point and a resource block grid of subcarriers, wherein the subcarrier offset is configured to determine the first resource; and the SSB includes a PCID configured to determine the first resource.

[0177] Figure 9 An example of NE 900 according to aspects of this disclosure is described. NE 900 may include a processor 902, a memory 904, a controller 906, and a transceiver 908. The processor 902, memory 904, controller 906, or transceiver 908, or various combinations thereof, or various components thereof, may be examples of components for performing the various aspects of this disclosure as described herein. These components may be coupled via one or more interfaces (e.g., operatively ground, communicatively ground, functional ground, electronic ground, electrical ground).

[0178] The processor 902, memory 904, controller 906, or transceiver 908, or various combinations or components thereof, may be implemented in hardware (e.g., a circuit system). The hardware may be a processor, digital signal processor (DSP), application-specific integrated circuit (ASIC), or other programmable logic device, or any combination thereof configured or otherwise supporting components for performing the functions described in this disclosure.

[0179] Processor 902 may include intelligent hardware devices (e.g., a general-purpose processor, DSP, CPU, ASIC, FPGA, or any combination thereof). In some embodiments, processor 902 may be configured to operate memory 904. In some other embodiments, memory 904 may be integrated into processor 902. Processor 902 may be configured to execute computer-readable instructions stored in memory 904 to cause NE 900 to perform various functions of this disclosure.

[0180] Memory 904 may comprise volatile or non-volatile memory. Memory 904 may store computer-readable, computer-executable code containing instructions that, when executed by processor 902, cause NE 900 to perform the various functions described herein. The code may be stored in a non-transitory computer-readable medium, such as memory 904 or another type of memory. Computer-readable medium includes both non-transitory computer storage media and communication media, wherein the communication media includes any media that facilitates the transfer of a computer program from one place to another. Non-transitory storage media may be any available media accessible by a general-purpose or special-purpose computer.

[0181] In some implementations, processor 902 and memory 904 coupled to processor 902 may be configured to cause NE 900 to perform one or more of the functions described herein (e.g., processor 902 executing instructions stored in memory 904). For example, processor 902 may support wireless communication at NE 900 according to examples disclosed herein.

[0182] The NE 900 can be configured or operated to support components for: transmitting an SSB containing a cell identifier configured for on-demand SIB1 transmission; receiving an SIB1 request; and transmitting SIB1 at least in part based on the SIB1 request.

[0183] In addition, the NE 900 may be configured or operable to support any or a combination of the following: wherein the SSB includes a PSS, an SSS, and a PBCH including a MIB; the MIB includes an indication that cell access is prohibited; the cell identifier configured for on-demand SIB transmission is defined in the specification; the SIB1 is transmitted for a predefined duration; the cell identifier includes a PCID; the SIB1 request includes a PRACH transmission; the SSB further includes an indication that the transmission of the SIB1 request is permitted; the SSB includes a PBCH, the PBCH including a MIB indicating that the cell associated with the cell identifier does not broadcast SIB1.

[0184] Alternatively, the NE 900 may support at least one memory (e.g., memory 904) and at least one processor (e.g., processor 902), the at least one processor being coupled to the at least one memory and configured to enable the NE to transmit an SSB, the SSB including a cell identifier configured for on-demand SIB1 transmission; receiving SIB1 requests; and transmitting SIB1 at least in part based on the SIB1 requests.

[0185] In addition, the NE 900 can be configured to support any or a combination of the following: wherein the SSB includes a PSS, an SSS, and a PBCH including a MIB; the MIB includes an indication that cell access is prohibited; the cell identifier configured for on-demand SIB transmission is defined in the specification; the at least one processor is configured to cause the network equipment to transmit the SIB1 for a predefined duration; the cell identifier includes a PCID; the SIB1 request includes a PRACH transmission; the SSB further includes an indication that the transmission of the SIB1 request is permitted; the SSB includes a PBCH, the PBCH including a MIB indicating that the cell associated with the cell identifier does not broadcast the SIB1.

[0186] The NE 900 can be configured or operated to support components for: transmitting an SSB containing an indication for transmitting at least a first resource for an on-demand SIB1 request; receiving the on-demand SIB1 request via the first resource; and transmitting SIB1 at least in part based on the on-demand SIB1 request.

[0187] Furthermore, the NE 900 may be configured or operable to support any or a combination of the following: wherein the SSB includes a cell identifier configured for on-demand SIB1 transmission; the cell identifier includes a PCID; the SSB includes an indication for determining a frequency reference point of the first resource; the frequency reference point includes the lowest subcarrier in which the SSB or at least one of one or more components of the SSB is transmitted; the SSB includes an indication of a subcarrier offset between the frequency reference point and a resource block grid of subcarriers, wherein the subcarrier offset is configured to determine the first resource; the SSB includes a PCID configured to determine the first resource; the SSB includes one or more of a MIB or PBCH containing an indication of the first resource; the SSB includes a MIB indicating a technique for determining the first resource.

[0188] Alternatively, the NE 900 may support at least one memory (e.g., memory 904) and at least one processor (e.g., processor 902), the at least one processor being coupled to the at least one memory and configured to enable the NE to issue an SSB containing an indication for issuing at least a first resource for issuing an on-demand SIB1 request; receiving the on-demand SIB1 request via the first resource; and issuing SIB1 at least in part based on the on-demand SIB1 request.

[0189] Furthermore, the NE 900 can be configured to support any or a combination of the following: wherein the SSB includes a cell identifier configured for on-demand SIB1 transmission; the cell identifier includes a PCID; the SSB includes an indication for determining a frequency reference point of the first resource; the frequency reference point includes the lowest subcarrier in which the SSB or at least one of one or more components of the SSB is transmitted; the SSB includes an indication of a subcarrier offset between the frequency reference point and a resource block grid of subcarriers, wherein the subcarrier offset is configured to determine the first resource; the SSB includes a PCID configured to determine the first resource; the SSB includes one or more of a MIB or PBCH containing an indication of the first resource; the SSB includes a MIB indicating a technique for determining the first resource.

[0190] Controller 906 manages the input and output signals of NE 900. Controller 906 can also manage peripheral devices not integrated into NE 900. In some embodiments, controller 906 may utilize an operating system such as iOS®, ANDROID®, WINDOWS®, or other operating systems. In some embodiments, controller 906 may be implemented as part of processor 902.

[0191] In some embodiments, the NE 900 may include at least one transceiver 908. In other embodiments, the NE 900 may have more than one transceiver 908. The transceiver 908 may represent a wireless transceiver. The transceiver 908 may include one or more receiver chains 910, one or more transmitter chains 912, or a combination thereof.

[0192] Receiver chain 910 may be configured to receive signals (e.g., control information, data, packets) over a wireless medium. For example, receiver chain 910 may include one or more antennas for receiving signals over the air or over a wireless medium. Receiver chain 910 may include at least one amplifier (e.g., a low-noise amplifier (LNA)) configured to amplify the received signal. Receiver chain 910 may include at least one demodulator configured to demodulate the received signal and obtain the transmitted data by reversing the modulation technique applied during signal transmission. Receiver chain 910 may include at least one decoder for decoding the demodulated signal to receive the transmitted data.

[0193] Transmitter chain 912 can be configured to generate and transmit signals (e.g., control information, data, packets). Transmitter chain 912 may include at least one modulator for modulating data onto a carrier signal, preparing the signal for transmission over a wireless medium. The at least one modulator may be configured to support one or more techniques, such as amplitude modulation (AM), frequency modulation (FM), or digital modulation schemes like phase shift keying (PSK) or quadrature amplitude modulation (QAM). Transmitter chain 912 may also include at least one power amplifier configured to amplify the modulated signal to an appropriate power level suitable for transmission over a wireless medium. Transmitter chain 912 may also include one or more antennas for transmitting the amplified signal into the air or wireless medium.

[0194] Figure 10 A flowchart illustrating method 1000 according to an aspect of this disclosure is provided. The operation of the method can be implemented by a UE as described herein. In some embodiments, the UE can execute a set of instructions to control functional elements of the UE to perform the described functions. It should be noted that the method described herein describes possible implementations, and the operation and steps can be rearranged or otherwise modified, and other implementations are possible.

[0195] At 1002, the method may include receiving an SSB. The operation of 1002 may be performed according to the examples described herein. In some embodiments, aspects of the operation of 1002 may be as described in references... Figure 7 The UE execution described.

[0196] At 1004, the method may include transmitting an SIB1 request at least in part based on the SSB, which includes a cell identifier configured for on-demand SIB1 transmission. The operation of 1004 may be performed according to the examples described herein. In some embodiments, aspects of the operation of 1004 may be as described in references... Figure 7 The UE execution described.

[0197] Figure 11 A flowchart illustrating method 1100 according to an aspect of this disclosure is provided. The operation of the method can be implemented by a UE as described herein. In some embodiments, the UE can execute a set of instructions to control functional elements of the UE to perform the described functions. It should be noted that the method described herein describes possible implementations, and the operation and steps can be rearranged or otherwise modified, and other implementations are possible.

[0198] At 1102, the method may include receiving cell-related information from the SSB. The operation of 1102 may be performed according to the examples described herein. In some embodiments, aspects of the operation of 1102 may be as described in references... Figure 7 The UE execution described.

[0199] At 1104, the method may include transmitting a first signal, at least in part, based on a first resource determined by the received SSB, the first signal containing an on-demand SIB1 request. Operation of 1104 may be performed according to examples as described herein. In some embodiments, aspects of operation of 1104 may be as referenced... Figure 7 The UE execution described.

[0200] Figure 12 A flowchart illustrating method 1200 according to an aspect of this disclosure is provided. The operation of the method can be implemented by an NE as described herein. In some embodiments, the NE may execute a set of instructions to control the functional elements of the NE to perform the described functions. It should be noted that the method described herein describes possible implementations, and the operation and steps may be rearranged or otherwise modified, and other implementations are possible.

[0201] At 1202, the method may include transmitting an SSB containing a cell identifier configured for on-demand SIB1 transmission. Operation of 1202 may be performed according to the examples described herein. In some embodiments, aspects of operation of 1202 may be as referenced... Figure 9 The NE execution described.

[0202] At 1204, the method may include receiving a SIB1 request. The operation of 1204 may be performed according to the examples described herein. In some embodiments, aspects of the operation of 1204 may be as described in references... Figure 9 The NE execution described.

[0203] At 1206, the method may include transmitting SIB1 at least in part based on the SIB1 request. The operation of 1206 may be performed according to the examples described herein. In some embodiments, aspects of the operation of 1206 may be as described in references... Figure 9 The NE execution described.

[0204] Figure 13 A flowchart illustrating method 1300 according to an aspect of this disclosure is provided. The operation of the method may be implemented by an NE as described herein. In some embodiments, the NE may execute a set of instructions to control the functional elements of the NE to perform the described functions. It should be noted that the method described herein describes possible implementations, and the operation and steps may be rearranged or otherwise modified, and other implementations are possible.

[0205] At 1302, the method may include issuing an SSB containing an indication for issuing at least a first resource for an on-demand SIB1 request. Operation of 1302 may be performed according to the examples described herein. In some embodiments, aspects of operation of 1302 may be as described in references... Figure 9 The NE execution described.

[0206] At 1304, the method may include receiving the on-demand SIB1 request via the first resource. The operation of 1304 may be performed according to the examples described herein. In some embodiments, aspects of the operation of 1304 may be as described in references... Figure 9 The NE execution described.

[0207] At 1306, the method may include transmitting SIB1 at least in part based on the on-demand SIB1 request. Operation of 1306 may be performed according to examples as described herein. In some embodiments, aspects of operation of 1306 may be as referenced... Figure 9 The NE execution described.

[0208] The description herein is provided to enable those skilled in the art to make or use this disclosure. Various modifications to this disclosure will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other variations without departing from the scope of this disclosure. Therefore, this disclosure is not limited to the examples and designs described herein, but should be given the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A user equipment (UE) for wireless communication, comprising: At least one memory; and At least one processor, coupled to the at least one memory and operable to cause the UE to: Receive cell-related information from the synchronization signal block (SSB); and A first signal is transmitted on a first resource determined at least in part based on the received SSB, the first signal including an On-Demand System Information Block 1 (SIB1) request.

2. The UE of claim 1, wherein the at least one processor is operable to cause the UE to receive SIB1 transmissions at least in part based on the on-demand SIB1 request.

3. The UE of claim 1, wherein the at least one processor is operable to cause the UE to transmit the first signal at least in part based on the SSB, the SSB including a cell identifier configured for on-demand SIB1 transmission.

4. The UE according to claim 3, wherein the cell identifier includes the Physical Cell Identifier (PCID).

5. The UE according to claim 1, wherein the first resource includes physical random access channel (PRACH) resources.

6. The UE of claim 1, wherein the at least one processor is operable to cause the UE to determine the first resource at least in part based on the second resource, the SSB being received via the second resource.

7. The UE of claim 1, wherein the at least one processor is operable to cause the UE to determine the first resource at least in part based on a frequency reference point associated with reception of the SSB.

8. The UE of claim 7, wherein the frequency reference point includes the lowest subcarrier in which the SSB or at least one of one or more components of the SSB is received.

9. The UE of claim 7, wherein the at least one processor is operable to cause the UE to determine the first resource at least in part based on the subcarrier offset between the frequency reference point and the resource block grid of the subcarrier.

10. The UE of claim 1, wherein the at least one processor is operable to cause the UE to determine the first resource at least in part based on the physical cell identifier (PCID) indicated by the SSB.

11. The UE of claim 1, wherein the at least one processor is operable to cause the UE to determine the first resource based at least in part on one or more of the Master Information Block (MIB) or Physical Broadcast Channel (PBCH) of the SSB.

12. A network device NE for wireless communication, comprising: At least one memory; and At least one processor, coupled to the at least one memory and operable to cause the NE to: Transmit a synchronization signal block SSB, the SSB including an indication of at least a first resource for transmitting a request for on-demand system information block 1 SIB1; Receive the on-demand SIB1 request via the first resource; and SIB1 is launched at least in part based on the on-demand SIB1 request.

13. The NE of claim 12, wherein the SSB includes a cell identifier configured for on-demand SIB1 transmission.

14. The NE according to claim 13, wherein the cell identifier includes the Physical Cell Identifier (PCID).

15. The NE of claim 12, wherein the SSB includes an indication for determining a frequency reference point of the first resource.

16. The NE of claim 15, wherein the frequency reference point includes the lowest subcarrier in which the SSB or at least one of one or more components of the SSB is transmitted.

17. The NE of claim 15, wherein the SSB includes an indication of a subcarrier offset between the frequency reference point and a resource block grid of subcarriers, wherein the subcarrier offset is configured to determine the first resource.

18. The NE of claim 12, wherein the SSB includes a Physical Cell Identifier (PCID) configured to determine the first resource.

19. A method performed by a user equipment (UE), the method comprising: Receive cell-related information from the synchronization signal block (SSB); and A first signal is transmitted on a first resource determined at least in part based on the received SSB, the first signal including an On-Demand System Information Block 1 (SIB1) request.

20. A method performed by a network device, the method comprising: Transmit a synchronization signal block SSB, the SSB including an indication of at least a first resource for transmitting a request for on-demand system information block 1 SIB1; Receive the on-demand SIB1 request via the first resource; and SIB1 is launched at least in part based on the on-demand SIB1 request.

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