Enhanced on-demand system information

Abstract

Aspects of the present disclosure generally relate to wireless communications. In some aspects, a user equipment (UE) may receive an indication of scheduling information for dedicated on-demand system information (SI) corresponding to a specified UE category, wherein the indication is carried in at least one of the following: a minimum system information (MSI) communication, a radio resource control (RRC) message, a response message for a two-step random access channel (RACH) process, a random access response (RAR) message for a four-step RACH process, a contention resolution message for a four-step RACH process, a message type flag indicating the transmission of dedicated on-demand SI, or a combination thereof; sending an on-demand SI request to a base station based at least in part on the scheduling information and the UE category; and receiving one or more on-demand system information blocks. A number of other aspects are also provided.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This patent application claims priority to U.S. Provisional Patent Application No. 62 / 982,009, filed on February 26, 2020, entitled “ENHANCED ON-DEMAND SYSTEM INFORMATION,” and U.S. Non-Provisional Patent Application No. 17 / 127,529, filed on December 18, 2020, entitled “ENHANCED ON-DEMAND SYSTEM INFORMATION,” both of which are expressly incorporated herein by reference. Technical Field

[0003] Aspects of the present disclosure relate generally to wireless communications, and to techniques and apparatus for enhanced on-demand system information. Background Art

[0004] Wireless communication systems are widely deployed to provide a variety of telecommunication services, such as telephony, video, data, messaging, and broadcasting. Typical wireless communication systems may employ multiple access technologies that can support communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single carrier frequency division multiple access (SC-FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and long term evolution (LTE). LTE / LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3GPP).

[0005] A wireless communication network may include multiple base stations (BS) that may support communication of multiple user equipments (UEs). User equipments (UEs) may communicate with base stations (BSs) via downlinks and uplinks. A downlink (or forward link) refers to a communication link from a BS to a UE, while an uplink (or reverse link) refers to a communication link from a UE to a BS. As will be described in more detail herein, a BS may be referred to as a Node B, gNB, access point (AP), radio head, transmit receive point (TRP), new radio (NR) BS, 5G Node B, etc.

[0006] The above multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different user equipment to communicate at a municipal, national, regional, or even global level. New Radio (NR), which may also be referred to as 5G, is an enhancement set of the LTE mobile standard promulgated by the Third Generation Partnership Project (3GPP). NR is designed to better support mobile broadband Internet access by improving spectrum efficiency, reducing costs, improving services, utilizing new spectrum, and better integrating with other open standards, which use orthogonal frequency division multiplexing (OFDM) (CP-OFDM) with a cyclic prefix (CP) on the downlink (DL), CP-OFDM and / or SC-FDM (e.g., also known as discrete Fourier transform spread OFDM (DFT-s-OFDM)) on the uplink (UL), and support beamforming, multiple input multiple output (MIMO) antenna technology, and carrier aggregation. However, as the demand for mobile broadband access continues to increase, there is a need to further improve LTE and NR technologies. Preferably, these improvements should be applicable to other multiple access technologies and telecommunication standards that adopt these technologies. Summary of the invention

[0007] In some aspects, a wireless communication method performed by a user equipment (UE) may include receiving an indication of scheduling information of dedicated on-demand system information (SI) from a base station, wherein the dedicated on-demand SI includes information corresponding to a specified UE category, wherein the indication is carried in at least one of the following: minimum system information (MSI) communication, a radio resource control (RRC) message, a response message of a two-step random access channel (RACH) process, a random access response (RAR) message of a four-step RACH process, a contention resolution message of a four-step RACH process, a message type flag indicating transmission of the dedicated on-demand SI, or a combination thereof; sending an on-demand SI request to the base station based at least in part on the scheduling information and the UE category; and requesting, from the base station and at least in part on the on-demand SI, to receive one or more on-demand SIBs in a dedicated on-demand system information block (SIB) set.

[0008] In some aspects, a wireless communication method performed by a base station may include sending an indication of scheduling information of dedicated on-demand SI to a UE, wherein the dedicated on-demand SI includes information corresponding to a specified UE category, wherein the indication is carried in at least one of the following: an MSI communication, an RRC message, a response message of a two-step RACH process, an RAR message of a four-step RACH process, a contention resolution message of a four-step RACH process, a message type flag indicating transmission of dedicated on-demand SI, or a combination thereof; receiving an on-demand SI request from the UE based at least in part on the scheduling information; and sending one or more on-demand SIBs in a dedicated on-demand SIB set to the UE and based at least in part on the on-demand SI request.

[0009] In some aspects, a UE for wireless communication may include a memory and one or more processors operably coupled to the memory. The memory and the one or more processors may be configured to receive an indication of scheduling information of dedicated on-demand SI from a base station, wherein the dedicated on-demand SI includes information corresponding to a specified UE category, wherein the indication is carried in at least one of the following: an MSI communication, an RRC message, a response message of a two-step RACH process, an RAR message of a four-step RACH process, a contention resolution message of a four-step RACH process, a message type flag indicating transmission of the dedicated on-demand SI, or a combination thereof; send an on-demand SI request to the base station based at least in part on the scheduling information and the UE category; and receive one or more on-demand SIBs in a dedicated on-demand SIB set from the base station and based at least in part on the on-demand SI request.

[0010] In some aspects, a base station for wireless communication may include a memory and one or more processors operably coupled to the memory. The memory and the one or more processors may be configured to send an indication of scheduling information of dedicated on-demand SI to a UE, wherein the dedicated on-demand SI includes information corresponding to a specified UE category, wherein the indication is carried in at least one of the following: an MSI communication, an RRC message, a response message of a two-step RACH process, an RAR message of a four-step RACH process, a contention resolution message of a four-step RACH process, a message type flag indicating transmission of dedicated on-demand SI, or a combination thereof; receive an on-demand SI request from the UE based at least in part on the scheduling information; and send one or more on-demand SIBs in a dedicated on-demand SIB set to the UE and based at least in part on the on-demand SI request.

[0011] In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. When executed by one or more processors of a UE, the one or more instructions may cause the one or more processors to receive an indication of scheduling information of dedicated on-demand SI from a base station, wherein the dedicated on-demand system information includes information corresponding to a specified UE category, wherein the indication is carried in at least one of the following: MSI communication, RRC message, response message of a two-step RACH process, RAR message of a four-step RACH process, contention resolution message of a four-step RACH process, message type flag indicating transmission of dedicated on-demand SI, or a combination thereof; send an on-demand SI request to the base station based at least in part on the scheduling information and the UE category; and receive one or more on-demand SIBs in a dedicated on-demand SIB set from the base station and based at least in part on the on-demand SI request.

[0012] In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. When executed by one or more processors of a UE, the one or more instructions may cause the one or more processors to send an indication of scheduling information of dedicated on-demand SI to the UE, wherein the dedicated on-demand system information includes information corresponding to a specified UE category, wherein the indication is carried in at least one of the following: MSI communication, RRC message, response message of a two-step RACH process, RAR message of a four-step RACH process, contention resolution message of a four-step RACH process, message type flag indicating transmission of dedicated on-demand SI, or a combination thereof; receive an on-demand SI request from the UE based at least in part on the scheduling information; and send one or more on-demand SIBs in a dedicated on-demand SIB set to the UE and based at least in part on the on-demand SI request.

[0013] In some aspects, an apparatus for wireless communication may include a component for receiving an indication of scheduling information of dedicated on-demand SI from a base station, wherein the dedicated on-demand system information includes information corresponding to a specified UE category, wherein the indication is carried in at least one of: an MSI communication, an RRC message, a response message of a two-step RACH process, an RAR message of a four-step RACH process, a contention resolution message of a four-step RACH process, a message type flag indicating transmission of dedicated on-demand SI, or a combination thereof; a component for sending an on-demand SI request to the base station based at least in part on the scheduling information and the UE category; and a component for receiving one or more on-demand SIBs in a dedicated on-demand SIB set from the base station and based at least in part on the on-demand SI request.

[0014] In some aspects, an apparatus for wireless communication may include a component for sending an indication of scheduling information of dedicated on-demand SI to a UE, wherein the dedicated on-demand system information includes information corresponding to a specified UE category, wherein the indication is carried in at least one of: an MSI communication, an RRC message, a response message of a two-step RACH process, an RAR message of a four-step RACH process, a contention resolution message of a four-step RACH process, a message type flag indicating transmission of dedicated on-demand SI, or a combination thereof; a component for receiving an on-demand SI request from the UE based at least in part on the scheduling information; and a component for sending one or more on-demand SIBs in a dedicated on-demand SIB set to the UE and based at least in part on the on-demand SI request.

[0015] Aspects generally include methods, apparatus, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, wireless communication devices, and / or processing systems as substantially described herein with reference to the drawings and description and illustrated thereby.

[0016] The features and technical advantages of the examples according to the present disclosure have been outlined quite broadly above so that the detailed description below may be better understood. Other features and advantages will be described below. The disclosed concepts and specific examples may be easily utilized as a basis for modifying or designing other structures to achieve the same purpose of the present disclosure. Such equivalent structures do not depart from the scope of the appended claims. The characteristics of the concepts disclosed herein, their organization and methods of operation, and associated advantages will be better understood from the following description when considered in conjunction with the accompanying drawings. Each of the accompanying drawings is provided for the purpose of illustration and description and is not provided as a definition of limitations to the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to be able to understand the above features of the present disclosure in detail, a more specific description briefly summarized above can be obtained by reference to various aspects, some of which are shown in the accompanying drawings. However, it should be noted that the drawings only show certain typical aspects of the present disclosure and should not be considered as limiting the scope of the present disclosure, as the description may admit other equally valid aspects. The same reference numerals in different drawings may identify the same or similar elements.

[0018] Figure 1 is a block diagram conceptually illustrating an example of a wireless communication network in accordance with aspects of the present disclosure.

[0019] Figure 2 is a block diagram conceptually illustrating an example of a base station communicating with a UE in a wireless communication network according to aspects of the present disclosure.

[0020] Figure 3 is a diagram illustrating an example of a call flow for configuring an uplink bandwidth portion for a four-step random access channel (RACH) procedure in accordance with aspects of the present disclosure.

[0021] Figure 4 is a diagram illustrating an example of a call flow for configuring an uplink bandwidth portion for a two-step RACH procedure in accordance with aspects of the present disclosure.

[0022] Figure 5 is a diagram illustrating an example of an enhanced on-demand system information process in accordance with aspects of the present disclosure.

[0023] Figure 6 is a diagram illustrating an example of an enhanced on-demand system information request in accordance with aspects of the present disclosure.

[0024] Figure 7 is a diagram illustrating an example of an enhanced on-demand system information process in accordance with aspects of the present disclosure.

[0025] Figure 8is a diagram illustrating an example process performed, for example, by a user device, according to aspects of the present disclosure.

[0026] Fig. 9 is a diagram illustrating example processes performed, for example, by a base station according to aspects of the present disclosure. DETAILED DESCRIPTION

[0027] The various aspects of the present disclosure will be described more fully below with reference to the accompanying drawings. However, the present disclosure can be embodied in a variety of different forms and should not be understood as being limited to any specific structure or function presented throughout the present disclosure. On the contrary, these aspects are provided so that the present disclosure becomes thorough and complete, and fully conveys the scope of the present disclosure to those skilled in the art. Based on the teachings herein, it should be understood by those skilled in the art that the scope of the present disclosure is intended to cover any aspect of the disclosure disclosed herein, whether independently implemented or combined with any other aspect of the present disclosure. For example, any number of aspects set forth herein can be used to implement a device or practice method. In addition, the scope of the present disclosure is intended to cover such a device or method practiced using other structures, functions, or structures and functions in addition to or different from the various aspects of the present disclosure set forth herein. It should be understood that any aspect of the present disclosure disclosed herein can be embodied by one or more elements of the claims.

[0028] Several aspects of telecommunication systems will now be presented with reference to various devices and techniques. These devices and techniques will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, algorithms, etc. (collectively referred to as "elements"). These elements can be implemented using hardware, software, or a combination thereof. Whether these elements are implemented in the form of hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0029] It should be noted that although various aspects may be described herein using terms typically associated with 3G and / or 4G wireless technologies, various aspects of the present disclosure may be applied to other generation-based communication systems (such as 5G and beyond, including NR technologies).

[0030] Figure 1A diagram of a wireless network 100 in which various aspects of the present disclosure may be practiced is shown. The wireless network 100 may be an LTE network or some other wireless network, such as a 5G or NR network. The wireless network 100 may include a plurality of BSs 110 (shown as BS 110a, BS 110b, BS 110c, and BS 110d) and other network entities. A BS is an entity that communicates with a user equipment (UE) and may also be referred to as a base station, NR BS, Node B, gNB, 5G Node B (NB), access point, transmit receive point (TRP), etc. Each BS may provide communication coverage for a particular geographic area. In 3GPP, the term "cell" may refer to a coverage area of ​​a BS and / or a BS subsystem serving that coverage area, depending on the context in which the term is used.

[0031] A BS may provide communication coverage for macro cells, pico cells, femto cells, and / or other types of cells. A macro cell may cover a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access to UEs with service subscriptions. A pico cell may cover a relatively small geographic area and may allow unrestricted access to UEs with service subscriptions. A femto cell may cover a relatively small geographic area (e.g., a home) and may allow restricted access to UEs associated with the femto cell (e.g., UEs in a closed subscriber group (CSG)). A BS for a macro cell may be referred to as a macro BS. A BS for a pico cell may be referred to as a pico BS. A BS for a femto cell may be referred to as a femto BS or a home BS. In Figure 1 In the example shown, BS 110a may be a macro BS of macro cell 102a, BS 110b may be a pico BS of pico cell 102b, and BS 110c may be a femto BS of femto cell 102c. A BS may support one or more (e.g., three) cells. Herein, the terms "eNB", "base station", "NR BS", "gNB", "TRP", "AP", "Node B", "5G NB", and "cell" may be used interchangeably.

[0032] In some aspects, the cell is not necessarily fixed, and the geographical area of ​​the cell can move according to the location of the mobile BS. In some aspects, the BS can be interconnected with each other and / or with one or more other BSs or network nodes (not shown) in the wireless network 100 using any suitable transmission network, through various types of backhaul interfaces (such as direct physical connection, virtual network, etc.).

[0033] The wireless network 100 may also include a relay station. A relay station is an entity that can receive data transmissions from an upstream station (e.g., a BS or a UE) and send data transmissions to a downstream station (e.g., a UE or a BS). A relay station may also be a UE that can relay transmissions for other UEs. Figure 1 In the example shown, a relay station 110d may communicate with the macro BS 110a and the UE 120d to facilitate communication between the BS 110a and the UE 120d. A relay station may also be referred to as a relay BS, a relay base station, a relay, or the like.

[0034] The wireless network 100 may be a heterogeneous network including different types of BSs (e.g., macro BSs, pico BSs, femto BSs, relay BSs, etc.). These different types of BSs may have different transmit power levels, different coverage areas, and different effects on interference in the wireless network 100. For example, a macro BS may have a higher transmit power level (e.g., 5 to 40 watts), while a pico BS, a femto BS, and a relay BS may have a lower transmit power level (e.g., 0.1 to 2 watts).

[0035] A network controller 130 may be coupled to a set of BSs and may provide coordination and control for these BSs. The network controller 130 may communicate with the BSs via a backhaul. The BSs may also communicate with each other directly or indirectly via a wireless or wired backhaul.

[0036] UE 120 (e.g., 120a, 120b, 120c) can be dispersed throughout the wireless network 100, and each UE can be fixed or mobile. UE can also be referred to as an access terminal, terminal, mobile station, subscriber unit, station, etc. UE can also be a mobile phone (smart phone), a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device or instrument, a biometric sensor / device, a wearable device (smart watch, smart clothing, smart glasses, smart wristband, smart jewelry (e.g., smart ring, smart bracelet, etc.)), an entertainment device (e.g., a music or video device, or a satellite radio, etc.), a vehicle component or sensor, a smart meter / sensor, an industrial manufacturing device, a global positioning system device, or any other suitable device configured to communicate via a wireless or wired medium.

[0037] Some UEs may be considered as machine type communication (MTC) or evolved or enhanced machine type communication (eMTC) UEs. MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, location tags, etc., which can communicate with base stations, other devices (e.g., remote devices), or some other entities. A wireless node may provide, for example, a connection for or to a network (e.g., a wide area network such as the Internet or a cellular network) via a wired or wireless communication link. Some UEs may be considered as Internet of Things (IoT) devices, and / or may be implemented as NB-IoT (narrowband Internet of Things) devices. Some UEs may be considered as customer premises equipment (CPE). UE 120 may be included in a housing that houses components of UE 120 (such as processor components, memory components, etc.). In some aspects, the processor component and the memory component may be coupled together. For example, a processor component (e.g., one or more processors) and a memory component (e.g., a memory) may be operably coupled, communicatively coupled, electronically coupled, electrically coupled, etc.

[0038] Generally, any number of wireless networks can be deployed in a given geographic area. Each wireless network can support a specific radio access technology (RAT) and can operate on one or more frequencies. RAT can also be referred to as radio technology, air interface, etc. Frequency can also be referred to as carrier, channel, etc. Each frequency can support a single RAT within a given geographic area to avoid interference between wireless networks of different RATs. In some cases, NR or 5G RAT networks can be deployed.

[0039] In some aspects, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) may communicate directly (e.g., without using base station 110 as an intermediary to communicate with each other) using one or more side link channels. For example, UE 120 may communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, vehicle-to-everything (V2X) protocols (e.g., which may include vehicle-to-vehicle (V2V) protocols, vehicle-to-infrastructure (V2I) protocols, etc.), mesh networks, etc. In this case, UE 120 may perform scheduling operations, resource selection operations, and / or other operations performed by base station 110 as described elsewhere herein.

[0040] As mentioned above, Figure 1 Other examples can be found in reference Figure 1 The content described is different.

[0041] Figure 2 A block diagram of a design 200 of a base station 110 and a UE 120 is shown, which may be Figure 11 and 1 in base station 110 and UE 120. Base station 110 may be equipped with T antennas 234a through 234t and UE 120 may be equipped with R antennas 252a through 252r, where in general, T≥1 and R≥1.

[0042] At the base station 110, the transmit processor 220 may receive data for one or more UEs from the data source 212, select one or more modulation and coding schemes (MCS) for each UE based at least in part on a channel quality indicator (CQI) received from the UE, process (e.g., encode and modulate) the data for each UE based at least in part on the MCS selected for the UE, and provide data symbols for all UEs. The transmit processor 220 may also process system information (e.g., for semi-static resource partitioning information (SRPI), etc.) and control information (e.g., CQI requests, grants, upper layer signaling, etc.), and provide overhead symbols and control symbols. The transmit processor 220 may also generate reference symbols for reference signals (e.g., cell-specific reference signals (CRS)) and synchronization signals (e.g., primary synchronization signals (PSS) and secondary synchronization signals (SSS)). If applicable, the transmit (TX) multiple-input multiple-output (MIMO) processor 230 can perform spatial processing (e.g., precoding) on ​​data symbols, control symbols, overhead symbols, and / or reference symbols, and can provide T output symbol streams to T modulators (MOD) 232a to 232t. Each modulator 232 can process its own output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream. Each modulator 232 can also process (e.g., convert to analog, amplify, filter, and up-convert) the output sample stream to obtain a downlink signal. The T downlink signals from modulators 232a to 232t can be transmitted via T antennas 234a to 234t, respectively. According to various aspects described in more detail below, a synchronization signal can be generated with position coding to convey additional information.

[0043] At the UE 120, antennas 252a to 252r may receive downlink signals from the base station 110 and / or other base stations, and may provide received signals to demodulators (DEMODs) 254a to 254r, respectively. Each demodulator 254 may condition (e.g., filter, amplify, downconvert, and digitize) the received signal to obtain input samples. Each demodulator 254 may also process the input samples (e.g., for OFDM, etc.) to obtain received symbols. The MIMO detector 256 may obtain received symbols from all R demodulators 254a to 254r, perform MIMO detection on the received symbols if applicable, and provide detected symbols. The receive processor 258 may process (e.g., demodulate and decode) the detected symbols, provide decoded data for the UE 120 to the data sink 260, and provide decoded control information and system information to the controller / processor 280. The channel processor may determine reference signal received power (RSRP), received signal strength indicator (RSSI), reference signal received quality (RSRQ), channel quality indicator (CQI), etc. In some aspects, one or more components of UE 120 may be included in a housing.

[0044] On the uplink, at the UE 120, a transmit processor 264 may receive and process data from a data source 262 and control information from a controller / processor 280 (e.g., for reports including RSRP, RSSI, RSRQ, CQI, etc.). The transmit processor 264 may also generate reference symbols for one or more reference signals. The symbols from the transmit processor 264 may be precoded by a TX MIMO processor 266, if applicable, further processed by modulators 254a through 254r (e.g., for DFT-s-FDM, CP-OFDM, etc.), and transmitted to the base station 110. At the base station 110, uplink signals from the UE 120 and other UEs may be received by antennas 234, processed by demodulators 232, detected by MIMO detectors 236, if applicable, and further processed by a receive processor 238 to obtain decoded data and control information transmitted by the UE 120. The receive processor 238 may provide the decoded data to a data sink 239 and the decoded control information to the controller / processor 240. The base station 110 may include a communication unit 244 and communicate with the network controller 130 via the communication unit 244. The network controller 130 may include a communication unit 294, a controller / processor 290, and a memory 292.

[0045] The controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or Figure 2Any other components of the system may perform one or more techniques associated with enhanced on-demand system information, as described in more detail elsewhere herein. For example, the controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or Figure 2 Any other component of the can perform or direct e.g. Figure 8 The process of 800 Fig. 9 The operations of process 900 and / or other processes as described herein. Memories 242 and 282 may store data and program codes for base station 110 and UE 120, respectively. In some aspects, memory 242 and / or memory 282 may include a non-transitory computer-readable medium storing one or more instructions for wireless communication. For example, when executed (e.g., directly or after compilation, conversion, interpretation, etc.) by one or more processors of base station 110 and / or UE 120, the one or more instructions may perform or direct, for example, Figure 8 The process of 800 Fig. 9 The process 900 and / or operations of other processes as described herein. In some aspects, executing instructions may include running instructions, converting instructions, compiling instructions, interpreting instructions, etc. The scheduler 246 can schedule UEs for data transmission on the downlink and / or uplink.

[0046] In some aspects, UE 120 may include components for receiving an indication of scheduling information of dedicated on-demand system information (SI) from a base station, wherein the dedicated on-demand system information includes information corresponding to a specified UE category, wherein the indication is carried in at least one of: a minimum system information (MSI) communication, a radio resource control (RRC) message, a response message of a two-step random access channel (RACH) procedure, a random access response (RAR) message of a four-step RACH procedure, a contention resolution message of a four-step RACH procedure, or a combination thereof; components for sending an on-demand SI request to the base station based at least in part on the scheduling information; and components for receiving one or more on-demand SIBs in a dedicated on-demand system information block (SIB) set from the base station and based at least in part on the on-demand SI request, etc. In some aspects, such components may include in conjunction with Figure 2 One or more components of UE 120 are depicted, such as controller / processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, etc.

[0047] In some aspects, the base station 110 may include components for sending an indication of scheduling information of dedicated on-demand system information (SI) to a user equipment (UE), wherein the dedicated on-demand system information includes information corresponding to a specified UE category, wherein the indication is carried in at least one of the following: a minimum system information (MSI) communication, a radio resource control (RRC) message, a response message of a two-step random access channel (RACH) procedure, a random access response (RAR) message of a four-step RACH procedure, a contention resolution message of a four-step RACH procedure, or a combination thereof; components for receiving an on-demand SI request from the UE based at least in part on the scheduling information; and components for sending one or more on-demand SIBs in a dedicated on-demand system information block (SIB) set to the UE and based at least in part on the on-demand SI request, etc. In some aspects, such components may include a combination of Figure 2 One or more components of base station 110 are depicted, such as antenna 234, DEMOD 232, MIMO detector 236, receive processor 238, controller / processor 240, transmit processor 220, TX MIMO processor 230, MOD 232, antenna 234, and the like.

[0048] As mentioned above, Figure 2 Other examples can be found in reference Figure 2 The content described is different.

[0049] Figure 3 is a diagram illustrating an example 300 of a call flow for configuring an uplink bandwidth portion for a four-step random access channel (RACH) procedure in accordance with aspects of the present disclosure.

[0050] like Figure 3 As shown, BS 110 and UE 120 exchange communications, including communications of RACH procedures, based at least in part on an initial activity event occurring with UE 120. The initial activity may include UE 120 powering on, UE 120 entering a coverage area of ​​BS 110, etc. According to some aspects described herein, UE 120 and BS 110 may utilize an initial active uplink bandwidth portion to perform Figure 3According to the RACH procedure, according to some aspects of the present disclosure, an uplink physical resource block (PRB) grid can be established for communication between UE 120 and BS 110. Thus, the initial active uplink bandwidth portion can enable UE 120 to save power resources (rather than transmitting across a wider bandwidth), ensure that UE 120 has bandwidth capabilities to communicate with BS 110 (because some types of UE 120 may not have wide bandwidth capabilities), and enable BS 110 to balance the load of the bandwidth portions of the bandwidth used to communicate with UE 120 (e.g., by evenly distributing communications with the UE across the uplink bandwidth portions of the uplink bandwidth).

[0051] As shown at 310, BS 110 transmits to UE 120 and UE 120 receives one or more synchronization signal blocks (SSBs) and some minimum system information (MSI), which includes RACH configuration information. For example, MSI may include communication information for UE 120 to communicate with BS 110. According to some aspects described herein, RACH configuration information may include information related to Figure 3 The RACH configuration information may be associated with an initial active uplink bandwidth portion of a RACH process for enabling the UE 120 and the BS 110 to establish a communication link. For example, the RACH configuration information may indicate or provide instructions for identifying a PRB frequency position of the initial uplink active bandwidth portion, a bandwidth of the initial uplink active bandwidth portion, and / or a parameter set of the initial uplink active bandwidth portion. Using the PRB frequency position, bandwidth, and / or parameter set of the initial uplink active bandwidth portion, an uplink PRB grid may be established for communication between the UE 120 and the BS 110.

[0052] like Figure 3 As shown, a RACH procedure is performed using the initial active uplink bandwidth portion (as shown by reference numerals 320-350). Figure 3120 sends a RACH request via a physical random access channel (PRACH), as shown in reference numeral 320, using information from the MSI. As shown in reference numeral 330, the BS 110 can respond to Msg.1 with Msg.2 (random access response (RAR)) via the PDSCH. As shown in reference numeral 340, the UE 120 sends Msg.3 (UE identification message) via the PUSCH. As shown in reference numeral 350, the BS 110 sends Msg.4 (contention resolution message) via the PDSCH. After the RACH process, as shown in reference numeral 360, the UE 120 can send a confirmation indicating that the UE 120 is ready to communicate with the BS 110 via the uplink PRB grid (used in the communication link between the UE 120 and the BS 110).

[0053] As mentioned above, Figure 3 Other examples can be found in reference Figure 3 The content described is different.

[0054] Figure 4 is a diagram illustrating an example 400 of a call flow for configuring an uplink bandwidth portion for a two-step RACH procedure in accordance with aspects of the present disclosure.

[0055] like Figure 4 As shown, base station 110 and UE 120 may communicate with each other to perform a two-step RACH procedure.

[0056] As indicated by reference numeral 405, the base station 110 may transmit and the UE 120 may receive one or more SSBs and / or MSIs including RACH configuration information. The MSI may include, for example, one or more SIBs. The SSBs, MSIs, etc. may include information related to one or more RACH occasion (RO) configurations, such as information related to one or more ordered preamble resources. As indicated by reference numeral 410, the UE 120 may perform downlink (DL) synchronization (e.g., using one or more SSBs), decode system information (SI) and / or RRC configuration information included in one or more SIBs, perform one or more measurements of reference signals (RS), etc. Based at least in part on performing the second operation 410, the UE 120 may determine one or more parameters for sending a random access message (RAM) in a two-step RACH process. For example, the UE 120 may determine one or more physical random access channel (PRACH) transmission parameters for sending the RAM, may determine one or more parameters for generating a preamble for the RAM, may identify one or more uplink resources on which the RAM is to be sent, etc.

[0057] As shown in reference numeral 415, UE 120 may send a RAM preamble. As shown in reference numeral 420, UE 120 may send a RAM payload. As shown, UE 120 may send a RAM preamble and a RAM payload as part of the first step of a two-step RACH process. RAM is sometimes referred to as message A, msgA, uplink message, request message, first (or initial) message in a two-step RACH process, etc. RAM preamble is sometimes referred to as message A preamble, msgA preamble, preamble, etc. RAM payload is sometimes referred to as message A payload, msgA payload, payload, etc.

[0058] In some aspects, the RAM may include some or all of the contents of message 1 (msg1) and message 3 (msg3) of the four-step RACH process. For example, the RAM preamble may include some or all of the contents of message 1 (e.g., the RACH preamble), and the RAM payload may include some or all of the contents of message 3. For example, in some aspects, the RAM payload may include an identifier associated with the UE 120, uplink control information, a medium access control (MAC) layer control element (e.g., a power headroom report, a buffer status report, a beam failure report, a channel status report, etc.), user plane data, control plane data, etc. In addition, in some aspects, the msgA preamble and the msgA payload may be time division multiplexed (TDM) with each other, such that the msgA preamble and the msgA payload are sent in separate symbols based at least in part on the time division multiplexing configuration.

[0059] As indicated by reference numeral 425, base station 110 may receive a RAM preamble sent by UE 120. If base station 110 successfully receives and decodes the RAM preamble, base station 110 may then receive and decode the RAM payload. As indicated by reference numeral 430, base station 110 may send a random access response (RAR) message. As shown, base station 110 may send a RAR message as part of the second step of a two-step RACH process. The RAR message is sometimes referred to as message B, msgB, a response message, a second message in a two-step RACH process, etc.

[0060] The RAR message may include some or all of the contents of message 2 (msg2) and message 4 (msg4) of the four-step RACH process. For example, the RAR message may include a detected RACH preamble identifier, a detected UE identifier, a timing advance value, contention resolution information, etc. In some aspects, the RAR message may include a first part (e.g., including some or all of the contents of msg2 of the four-step RACH process) sent via a physical downlink control channel (PDCCH) and a second part (e.g., including some or all of the contents of msg4 of the four-step RACH process) sent via a physical downlink shared channel (PDSCH). In some aspects, based on whether the UE 120 successfully receives and decodes the RAR message, the UE 120 may send a hybrid automatic repeat request (HARQ) feedback (e.g., an acknowledgment (ACK) indicating that the RAR message was successfully received and decoded, or a negative acknowledgment (NACK) indicating that the RAR message was not successfully received and decoded) to the base station 110 via a physical uplink control channel (PUCCH).

[0061] Existing NR specifications have been developed to support both periodic and on-demand broadcasts of SI. In existing specifications, UE 120 may request on-demand SIBs using msg1 or msg3 of the four-step RACH. With the introduction of new use cases and UE capabilities, not all SIBs are necessarily useful to UE 120. For example, BS 110 may provide network services to advanced UE 120 (which may be referred to as legacy UE or high-layer UE), reduced-capability UE (which may be referred to as low-layer UE), etc. The information contained in the SIB for advanced UEs may be irrelevant to the reduced-capability UEs.

[0062] An "advanced UE" may refer to a UE associated with a receive bandwidth capability for receiving downlink signals / channels above a certain threshold (e.g., a bandwidth greater than or equal to 100 megahertz (MHz)). Conversely, a "reduced capability UE" (which may be referred to as an "NR-light UE" and / or a "low capability UE") may refer to a UE having a bandwidth capability for receiving downlink signals / channels below a certain threshold (e.g., a bandwidth less than 10 MHz, a bandwidth less than 5 MHz, etc.). Reduced capability UEs may include wearable devices, Internet of Things (IoT) devices, sensors, cameras, etc., associated with limited bandwidth, power capacity, transmission range, etc.

[0063] Aspects of the techniques and devices described herein may include providing a dedicated SIB including information related to the UE category (e.g., advanced, reduced capabilities, etc.) for which the dedicated SIB is intended. In some aspects, SI previously available through always-on (periodic) broadcasts may be available as on-demand SI upon request. In some aspects, the BS may indicate a dedicated on-demand SIB using msg2 of four-step RACH, msg 4 of four-step RACH, MSI, msg B of two-step RACH, etc. These techniques may help reduce the signaling overhead of always-on broadcasts. In some aspects, the UE may request an on-demand SIB using msg 1 of four-step RACH, ACK of msg 4 of four-step RACH, ACK of msg A of two-step RACH, ACK of msg B of two-step RACH, media access control (MAC) control element (CE), uplink control information (UCI), etc. Aspects such as these may help reduce the monitoring opportunity of PDCCH, improve the coexistence of UEs with different capabilities, etc.

[0064] As mentioned above, Figure 4 Other examples can be found in reference Figure 4 The content described is different.

[0065] Figure 5 is an example 500 illustrating an enhanced on-demand system information process according to aspects of the present disclosure. Figure 5 As shown, BS 110 and UE 120 may communicate with each other.

[0066] As indicated by reference numeral 505, BS 110 may send, and UE 120 may receive, an indication of scheduling information for dedicated on-demand SI. Dedicated on-demand SI may include information corresponding to a specified UE category (e.g., advanced UE, reduced capability UE, etc.). In some aspects, the information corresponding to the specified UE category may include an indication of a repetition pattern for repeating transmissions to the UE, a SIB transmission window, an index to a control resource set lookup table, etc. In some aspects, the on-demand SI request may include an indication of a UE use case, UE capabilities, etc.

[0067] In some aspects, the indication may be carried in an MSI communication, a radio resource control (RRC) message, a response message of a two-step RACH procedure, a RAR message of a four-step RACH procedure, a contention resolution message of a four-step RACH procedure, etc. In some aspects, the MSI communication may include a master information block (MIB), a dedicated MIB, wherein the dedicated MIB includes information corresponding to a specified UE category, a system information block 1 (SIB1), a dedicated SIB1, wherein the dedicated SIB1 includes information corresponding to a specified UE category, etc.

[0068] In some aspects, a dedicated MIB may include an existing MIB (a MIB defined in an existing specification, which may be referred to herein as a "legacy MIB") modified by one or more of several technologies, a new MIB defined in a specification, and the like. For example, in some aspects, a dedicated MIB may include an existing MIB modified by using one or more previously unused bits to carry information corresponding to a specified UE category. For example, an existing MIB includes reserved bits. In some aspects, reserved bits may be used to carry information corresponding to a specified UE category. In some aspects, a dedicated MIB may include an existing MIB modified by adding one or more new data fields to carry information corresponding to a specified UE category, adding one or more new information elements to carry information corresponding to a specified UE category, and the like.

[0069] In some aspects, the dedicated SIB1 may include an existing SIB1 (which may be referred to herein as a "legacy SIB1") modified using one or more techniques described herein, a new SIB1 defined in a specification, etc. In some aspects, the dedicated SIB1 may include a legacy SIB1 modified by using previously unused bits to carry information corresponding to a specified UE category, adding one or more new data fields to carry information corresponding to a specified UE category, adding one or more new IEs to carry information corresponding to a specified UE category, etc.

[0070] In some aspects, an indication of scheduling information for dedicated on-demand SI may be carried in an enhanced SIB1 IE configured to carry SI scheduling information. In some aspects, an indication may be carried in a dedicated IE that maps to at least one of legacy SIB1, dedicated SIB1, or a combination thereof. The mapping of the dedicated IE to legacy SIB1, dedicated SIB1, or a combination thereof may be established based at least in part on a priority associated with the dedicated on-demand SI.

[0071] As shown by reference numeral 510, UE 120 may send an on-demand SI request based at least in part on the scheduling information, and BS 110 may receive the on-demand SI request based at least in part on the scheduling information. In some aspects, the on-demand SI request may be carried in a request message of a two-step RACH procedure. The on-demand SI request may be carried in a preamble of the request message, in a payload of the request message, or in a combination thereof. In some aspects, the on-demand SI request may be indicated using one or more dedicated parameters defined in the specification for the two-step RACH procedure.

[0072] The parameters may include, for example, a configuration index parameter (named msgA-prach-ConfigurationIndex), a frequency division multiplexing (FDM) parameter (named msgA-FDM), a starting frequency parameter (named msgA-FrequencyStart), a response window of a response message (named msgB_ra-ResponseWindow), a power ramp step parameter (named msgA_prach-powerRampingStep), a physical uplink shared channel (PUSCH) power ramp step parameter (named msgA_pusch-powerRampingStep), a physical RACH received target power parameter (named msgA_prach-ReceivedTargetPower), a PUSCH received target power parameter (named msgA_PUSCH-ReceivedTargetPower), etc.

[0073] In some aspects, the on-demand SI request may be sent using a resource set configured at least in part based on dedicated time resources for RACH opportunities (RO), dedicated frequency resources for RO, dedicated code resources for RO, dedicated time resources for PUSCH opportunities (PO), dedicated frequency resources for PO, dedicated code resources for PO, etc. In some aspects, the on-demand SI request may be sent using a resource set configured at least in part based on one or more dedicated SSB to RO association patterns.

[0074] In some aspects, the on-demand SI request may be sent as part of the UCI. Sending the on-demand SI request may include piggybacking the UCI on the PUSCH message of the four-step RACH process. In some aspects, "piggybacking" may refer to puncturing the PUSCH communication with the UCI by replacing one or more bits of the PUSCH communication with one or more bits of the UCI. In some aspects, "piggybacking" may refer to rate matching the PUSCH with respect to the UCI. In this way, the UCI may be sent on the PUSCH. In some aspects, the UCI may be piggybacked on the PUSCH portion of the request message of the two-step RACH process.

[0075] In some aspects, sending an on-demand SI request may include sending UCI using a physical uplink control channel (PUCCH). The on-demand SI request may be multiplexed on the PUCCH with a hybrid automatic repeat request acknowledgement (HARQ-ACK) sent based at least in part on a contention resolution message of a four-step RACH process. In some aspects, the on-demand SI request may be multiplexed on the PUCCH with a HARQ-ACK sent based at least in part on a response message of a two-step RACH process. In some aspects, the on-demand SI request may be multiplexed on the PUCCH with a scheduling request (SR), a channel state information (CSI) report, etc.

[0076] As indicated by reference numeral 515, BS 110 may send one or more on-demand SIBs in a dedicated on-demand SIB set based at least in part on the on-demand SI request, and UE 120 may receive one or more on-demand SIBs in a dedicated on-demand SIB set based at least in part on the on-demand SI request.

[0077] As mentioned above, Figure 5 Other examples can be found in reference Figure 5 The content described is different.

[0078] Figure 6 is a diagram illustrating an example 600 of an enhanced on-demand system information request in accordance with aspects of the present disclosure.

[0079] In some aspects, the on-demand SI request may be sent by the UE 120 to the BS 110 using a dedicated medium access control (MAC) control element (CE) defined by the specification. As indicated by reference numeral 605, the on-demand SI request may include a bitmap including bits corresponding to each dedicated on-demand SIB in the dedicated on-demand SIB set. As shown, each bit indicates that the corresponding on-demand SIB is to be included in the response to the on-demand SI request (in Figure 6 Expected SIB) or will it not be included in the response (in Figure 6 t is marked as “unexpected SIB” in Figure 2).

[0080] In some aspects, bitmap 605 may be defined as a new MAC-CE for transmission of a payload of a request message via a two-step RACH procedure. In some aspects, sending an on-demand SI request may include multiplexing a new MAC-CE with a common control channel (CCCH) message, an additional MAC-CE, etc.

[0081] As shown by reference numeral 610, the on-demand SI request may indicate a set of indices corresponding to a subset of a dedicated on-demand SIB set to be included in a response to the on-demand SI request, or corresponding to a subset of a dedicated on-demand SIB set not included in the response. Each index in the set of indices may be represented using a bit string. A flag bit may indicate whether the included bit string refers to a dedicated on-demand SIB to be included or to a dedicated on-demand SIB not to be included. The on-demand SI request may include a field including one or more bits indicating the total number of indices included in the on-demand SI request.

[0082] As mentioned above, Figure 6 Other examples can be found in reference Figure 6 The content described is different.

[0083] Figure 7 is a diagram illustrating an example 700 of an enhanced on-demand system information process according to aspects of the present disclosure. Figure 7 As shown, BS 110 may send the requested on-demand SIB using unicast transmission and / or multicast transmission.

[0084] For example, as shown at reference numeral 705, the BS 110 may transmit the requested SIB using a unicast transmission for each requesting UE 120. As shown at reference numeral 710, a first UE 120 (shown as UE A) may transmit and the BS 110 may receive an on-demand SI request identifying one or more on-demand SIBs (represented using SIB indices L4 and L5). As shown at reference numeral 715, a second UE 120 (shown as UE B) may transmit and the BS 110 may receive an on-demand SI request identifying one or more on-demand SIBs (represented using SIB indices L1, L2, and L3). As shown at reference numeral 720, the BS 110 may transmit and the UE A 120 may receive a unicast transmission including the dedicated on-demand SIB requested by the UE A 120. Similarly, as shown at reference numeral 725, the BS 110 may transmit and the UE B 120 may receive a unicast transmission including the dedicated on-demand SIB requested by the UE B 120.

[0085] In some aspects, as shown at reference numerals 730 and 750, the BS 110 may utilize multicast to send the requested dedicated on-demand SIBs to multiple requesting UEs 120. As shown at reference numeral 735, UE A 120 may send and BS 110 may receive an on-demand SI request identifying one or more on-demand SIBs (denoted using SIB indices L1, L2, L3, L4, and L5). As shown at reference numeral 740, UE B 120 may send and BS 110 may receive an on-demand SI request identifying the same SIBs. As shown at reference numeral 745, BS 110 may send and UE A 120 and UE B 120 may receive a multicast transmission including the union of the set of SIBs requested by each UE 120.

[0086] As indicated at reference numeral 750, in some aspects, the on-demand SI request may identify a UE category and / or capabilities associated with UE 120, and BS 110 may send a multicast transmission based at least in part on the on-demand SI request including a pre-configured SIB specific to the UE category and / or capabilities.

[0087] As indicated by reference numeral 755, UE A 120 may send, and BS 110 may receive, an on-demand SI request identifying a UE category (shown as "reduced capabilities"). As indicated by reference numeral 760, UE B 120 may send, and BS 110 may receive, an on-demand SI request identifying the same UE category. As indicated by reference numeral 765, BS 110 may send, and UE A 120 and UE B 120 may receive, a multicast transmission including a pre-configured SIB set dedicated to the identified UE category ("reduced capabilities").

[0088] As mentioned above, Figure 7 Other examples can be found in reference Figure 7 The content described is different.

[0089] Figure 8 8 is a diagram illustrating an example process 800 performed, for example, by a UE in accordance with aspects of the present disclosure. Example process 800 is an example of a UE (eg, UE 120, etc.) performing operations associated with enhanced on-demand system information.

[0090] like Figure 8As shown, in some aspects, process 800 may include receiving an indication of scheduling information of dedicated on-demand SI from a BS, wherein the dedicated on-demand SI includes information corresponding to a specified UE category, wherein the indication is carried in at least one of the following: an MSI communication, an RRC message, a response message of a two-step RACH process, an RAR message of a four-step RACH process, a contention resolution message of a four-step RACH process, a message type flag indicating the transmission of the dedicated on-demand SI, or a combination thereof (block 810). For example, a UE (e.g., using a receiving processor 258, a controller / processor 280, a memory 282, etc.) may receive an indication of scheduling information of dedicated on-demand SI from a BS, as described above. In some aspects, the dedicated on-demand SI includes information corresponding to a specified UE category. In some aspects, the indication is carried in at least one of an MSI communication, an RRC message, a response message of a two-step RACH process, an RAR message of a four-step RACH process, a contention resolution message of a four-step RACH process, or a combination thereof.

[0091] like Figure 8 As further shown, in some aspects, process 800 may include sending an on-demand SI request to the BS based at least in part on the scheduling information (block 820). For example, the UE (e.g., using transmit processor 264, controller / processor 280, memory 282, etc.) may send an on-demand SI request to the BS based at least in part on the scheduling information, as described above.

[0092] like Figure 8 As further shown, in some aspects, process 800 may include receiving, from the BS and based at least in part on the on-demand SI request, one or more on-demand SIBs in a dedicated on-demand SIB set (block 830). For example, the UE (e.g., using receive processor 258, controller / processor 280, memory 282, etc.) may receive, from the BS and based at least in part on the on-demand SI request, one or more on-demand SIBs in a dedicated on-demand SIB set, as described above.

[0093] Process 800 may include additional aspects, such as any single aspect or any combination of aspects described below, and / or in conjunction with one or more other processes described elsewhere herein.

[0094] In a first aspect, MSI communication includes: a legacy master information block (MIB); a dedicated MIB, wherein the dedicated MIB includes information corresponding to a specified UE category; a legacy system information block 1 (SIB1); a dedicated SIB1, wherein the dedicated SIB1 includes information corresponding to a specified UE category; or a combination thereof.

[0095] In a second aspect, alone or in combination with the first aspect, a dedicated MIB includes, wherein the dedicated MIB includes a traditional MIB modified by: using one or more previously unused bits to carry information corresponding to a specified UE category; adding one or more new data fields, wherein the one or more new data fields carry information corresponding to the specified UE category; adding one or more new information elements (IEs), wherein the one or more new IEs carry information corresponding to the specified UE category; configuring a different value range for one or more existing data fields of the traditional MIB; configuring the MIB message type flag to indicate a new dedicated MIB transmission; or a combination thereof.

[0096] In a third aspect, alone or in combination with one or more of the first and second aspects, the designated UE category comprises a reduced capability UE type.

[0097] In a fourth aspect, alone or in combination with one or more of the first to third aspects, the dedicated MIB includes a new MIB defined in the specification and a MIB message type flag multiplexed with the content of the new MIB.

[0098] In a fifth aspect, either alone or in combination with one or more of the first to fourth aspects, the dedicated SIB1 comprises a traditional SIB1 modified by: using one or more previously unused bits to carry information corresponding to a specified UE category; adding one or more new data fields, wherein the one or more new data fields carry information corresponding to a specified UE category; adding one or more new information elements (IEs), wherein the one or more new IEs carry information corresponding to a specified UE category; configuring a different value range for one or more existing data fields of the traditional SIB1; configuring the SIB1 message type flag to indicate a new dedicated SIB1 transmission; or a combination thereof.

[0099] In a sixth aspect, alone or in combination with one or more of the first to fifth aspects, the designated UE category comprises a new set of UE capabilities designated for a reduced capability device type.

[0100] In a seventh aspect, alone or in combination with one or more of the first to sixth aspects, the dedicated SIB1 includes a new SIB1 defined in the specification and a SIB1 message type flag multiplexed with the content of the new SIB1.

[0101] In the eighth aspect, alone or in combination with one or more of the first to seventh aspects, the information corresponding to the specified UE category includes at least one of the following: an indication of at least one of a repetition pattern or a frequency hopping pattern for repeated transmission to the UE, a SIB transmission window configuration including at least one of a period or a time offset relative to a system frame number (SFN), an index to a control resource set lookup table, a SIB message type flag indicating the transmission of a new SIB for the specified UE category, or a combination thereof.

[0102] In the ninth aspect, alone or in combination with one or more of the first to eighth aspects, an indication of scheduling information for dedicated on-demand SI is carried in at least one of the following: an enhanced SIB1 information element (IE) configured to carry SI scheduling information; a dedicated IE, wherein the dedicated IE is mapped to at least one of SIB1, dedicated SIB1 or a combination thereof; or a combination thereof.

[0103] In a tenth aspect, alone or in combination with one or more of the first to ninth aspects, a mapping of dedicated IEs to SIB1, dedicated SIB1, or a combination thereof is established based at least in part on a priority associated with the dedicated on-demand SI.

[0104] In an eleventh aspect, alone or in combination with one or more of the first to tenth aspects, an on-demand SI request is carried in a request message of a two-step RACH procedure.

[0105] In the twelfth aspect, alone or in combination with one or more of the first to eleventh aspects, the on-demand SI request is carried in at least one of the preamble of the request message of the two-step RACH process, the payload of the request message of the two-step RACH process, or a combination thereof.

[0106] In a thirteenth aspect, alone or in combination with one or more of the first to twelfth aspects, one or more dedicated parameters defined in the specification for a two-step RACH procedure are used to indicate an on-demand SI request.

[0107] In a fourteenth aspect, alone or in combination with one or more of the first to thirteenth aspects, the on-demand SI request includes an indication of at least one of a UE use case, a UE capability, or a combination thereof.

[0108] In the fifteenth aspect, alone or in combination with one or more of the first to fourteenth aspects, a resource set is used to send an on-demand SI request, and the resource set is configured at least in part based on: dedicated time resources for RACH opportunity (RO), dedicated frequency resources for RO, dedicated code resources for RO, dedicated time resources for physical uplink shared channel (PUSCH) opportunity (PO), dedicated frequency resources for PO, dedicated code resources for PO, or a combination thereof.

[0109] In a sixteenth aspect, alone or in combination with one or more of the first to fifteenth aspects, a resource set is used to send an on-demand SI request, and the resource set is configured at least in part based on one or more dedicated synchronization signal blocks (SSBs) to RACH opportunity (RO) association patterns.

[0110] In a seventeenth aspect, alone or in combination with one or more of the first to sixteenth aspects, a dedicated medium access control (MAC) control element (CE) defined by the specification is used to send the on-demand SI request.

[0111] In the eighteenth aspect, alone or in combination with one or more of the first to seventeenth aspects, the on-demand SI request includes a bit map, which includes a bit corresponding to each dedicated on-demand SIB in the dedicated on-demand SIB set, and the bit corresponding to each dedicated on-demand SIB indicates whether the corresponding on-demand SIB will be included in the response to the on-demand SI request or will not be included in the response.

[0112] In a nineteenth aspect, alone or in combination with one or more of the first to eighteenth aspects, a bitmap is defined as a new MAC-CE for transmission of a payload of a request message via a two-step RACH procedure.

[0113] In the twentieth aspect, alone or in combination with one or more of the first to nineteenth aspects, sending an on-demand SI request comprises multiplexing a new MAC-CE with at least one of a common control channel (CCCH) message, an additional MAC-CE, or a combination thereof.

[0114] In aspect 21, either alone or in combination with one or more of aspects 1 to 20, the on-demand SI request indicates a set of indices corresponding to any one of: a subset of a dedicated on-demand SIB set to be included in a response to the on-demand SI request, or a subset of a dedicated on-demand SIB set to not be included in a response to the on-demand SI request.

[0115] In a twenty-second aspect, alone or in combination with one or more of the first to twenty-first aspects, an on-demand SI request is sent using uplink control information (UCI).

[0116] In a twenty-third aspect, alone or in combination with one or more of the first to twenty-second aspects, sending the on-demand SI request includes piggybacking the UCI on a physical uplink shared channel (PUSCH) message of a four-step RACH procedure.

[0117] In a twenty-fourth aspect, alone or in combination with one or more of the first to twenty-third aspects, sending the on-demand SI request includes piggybacking the UCI on a PUSCH portion of a request message of a two-step RACH procedure.

[0118] In the twenty-fifth aspect, alone or in combination with one or more of the first to twenty-fourth aspects, sending an on-demand SI request includes sending UCI using a physical uplink control channel (PUCCH), wherein the on-demand SI request is multiplexed with a hybrid automatic repeat request acknowledgment (HARQ-ACK) sent based at least in part on a contention resolution message of a four-step RACH process.

[0119] In a twenty-sixth aspect, either alone or in combination with one or more of aspects one to twenty-fifth, sending an on-demand SI request comprises sending UCI using a PUCCH, wherein the on-demand SI request is multiplexed with a HARQ-ACK sent based at least in part on a response message of a two-step RACH procedure.

[0120] In the twenty-seventh aspect, alone or in combination with one or more of the first to twenty-sixth aspects, sending an on-demand SI request includes sending UCI using PUCCH, wherein the on-demand SI request is multiplexed with at least one of a scheduling request, a channel state information report, or a combination thereof.

[0121] In a twenty-eighth aspect, either alone or in combination with one or more of the first to twenty-seventh aspects, the on-demand SI request identifies one or more on-demand SIBs, and receiving one or more on-demand dedicated SIBs comprises receiving a unicast transmission based at least in part on the on-demand SI request.

[0122] In the twenty-ninth aspect, alone or in combination with one or more of the first to twenty-eight aspects, the on-demand SI request identifies a subset of the dedicated on-demand SIB set, and receiving one or more on-demand dedicated SIBs includes receiving a multicast transmission based at least in part on the on-demand SI request and additional on-demand SI requests from additional UEs.

[0123] In the thirtieth aspect, alone or in combination with one or more of aspects one to twenty-ninth, the on-demand SI request identifies a UE category associated with the UE, and receiving one or more on-demand dedicated SIBs includes receiving a multicast transmission based at least in part on the on-demand SI request and an additional on-demand SI request from an additional UE, wherein the additional on-demand SI request indicates that the UE category is associated with the additional UE.

[0124] although Figure 8 Example blocks of process 800 are shown, but in some aspects process 800 may include Figure 8 The blocks depicted in the process 800 may be more blocks, fewer blocks, different blocks, or blocks in a different arrangement. Additionally or alternatively, two or more of the blocks in the process 800 may be executed in parallel.

[0125] Fig. 9 is a diagram illustrating an example process 900, performed, for example, by a BS, in accordance with aspects of the present disclosure. Example process 900 is an example of a BS (eg, BS 110, etc.) performing operations associated with enhanced on-demand system information.

[0126] like Fig. 9 As shown, in some aspects, process 900 may include sending an indication of scheduling information of dedicated on-demand SI to the UE, wherein the dedicated on-demand SI includes information corresponding to a specified UE category, wherein the indication is carried in at least one of the following: an MSI communication, an RRC message, a response message of a two-step RACH process, an RAR message of a four-step RACH process, a contention resolution message of a four-step RACH process, a message type flag indicating the transmission of the dedicated on-demand SI, or a combination thereof (block 910). For example, the BS (e.g., using the transmitting processor 220, the controller / processor 240, the memory 242, etc.) may send an indication of scheduling information of the dedicated on-demand SI to the UE, as described above. In some aspects, the dedicated on-demand SI includes information corresponding to the specified UE category. In some aspects, the indication is carried in at least one of an MSI communication, an RRC message, a response message of a two-step RACH process, an RAR message of a four-step RACH process, a contention resolution message of a four-step RACH process, or a combination thereof.

[0127] like Fig. 9 As further shown, in some aspects, process 900 may include receiving an on-demand SI request from the UE based at least in part on the scheduling information (block 920). For example, the BS (e.g., using receive processor 238, controller / processor 240, memory 242, etc.) may receive an on-demand SI request from the UE based at least in part on the scheduling information, as described above.

[0128] like Fig. 9As further shown, in some aspects, process 900 may include sending one or more on-demand SIBs in a dedicated on-demand SIB set to the UE based at least in part on the on-demand SI request (block 930). For example, the BS (e.g., using transmit processor 220, controller / processor 240, memory 242, etc.) may send one or more on-demand SIBs in a dedicated on-demand SIB set to the UE based at least in part on the on-demand SI request, as described above.

[0129] Process 900 may include additional aspects, such as any single aspect or any combination of aspects described below, and / or in conjunction with one or more other processes described elsewhere herein.

[0130] In a first aspect, MSI communication includes: a legacy master information block (MIB); a dedicated MIB, wherein the dedicated MIB includes information corresponding to a specified UE category; a legacy system information block 1 (SIB1); a dedicated SIB1, wherein the dedicated SIB1 includes information corresponding to a specified UE category; or a combination thereof.

[0131] In a second aspect, either alone or in combination with the first aspect, the dedicated MIB comprises a conventional MIB modified by: using one or more previously unused bits to carry information corresponding to a specified UE category; adding one or more new data fields, wherein the one or more new data fields carry information corresponding to a specified UE category; adding one or more new information elements (IEs), wherein the one or more new IEs carry information corresponding to a specified UE category; configuring a different value range for one or more existing data fields of the conventional MIB; configuring a MIB message type flag to indicate a new dedicated MIB transmission; or a combination thereof.

[0132] In a third aspect, alone or in combination with one or more of the first and second aspects, the designated UE category comprises a reduced capability device type.

[0133] In a fourth aspect, alone or in combination with one or more of the first to third aspects, the dedicated MIB includes a new MIB defined in the specification and a MIB message type flag indicating transmission of the new MIB.

[0134] In a fifth aspect, either alone or in combination with one or more of the first to fourth aspects, the dedicated SIB1 comprises a traditional SIB1 modified by: using one or more previously unused bits to carry information corresponding to a specified UE category; adding one or more new data fields, wherein the one or more new data fields carry information corresponding to a specified UE category; adding one or more new information elements (IEs), wherein the one or more new IEs carry information corresponding to a specified UE category; configuring a different value range for one or more existing data fields of the traditional SIB1; configuring the SIB1 message type flag to indicate a new dedicated SIB1 transmission; or a combination thereof.

[0135] In a sixth aspect, alone or in combination with one or more of the first to fifth aspects, the designated UE category includes an NR lightweight type.

[0136] In a seventh aspect, alone or in combination with one or more of the first to sixth aspects, the dedicated SIB1 includes a new SIB1 defined in the specification and a SIB1 message type flag indicating transmission of the new SIB1.

[0137] In the eighth aspect, alone or in combination with one or more of the first to seventh aspects, the information corresponding to the specified UE category includes at least one of the following: an indication of at least one of a repetition pattern or a frequency hopping pattern for repeated transmission to the UE, a SIB transmission window configuration including at least one of a period or a time offset relative to a system frame number (SFN), an index to a control resource set lookup table, a SIB message type flag indicating the transmission of a new SIB for the specified UE category, or a combination thereof.

[0138] In the ninth aspect, alone or in combination with one or more of the first to eighth aspects, an indication of scheduling information for dedicated on-demand SI is carried in at least one of the following: an enhanced SIB1IE configured to carry SI scheduling information; a dedicated IE, wherein the dedicated IE is mapped to at least one of SIB1, dedicated SIB1 or a combination thereof; or a combination thereof.

[0139] In a tenth aspect, alone or in combination with one or more of the first to ninth aspects, a mapping of dedicated IEs to SIB1, dedicated SIB1, or a combination thereof is established based at least in part on a priority associated with the dedicated on-demand SI.

[0140] In an eleventh aspect, alone or in combination with one or more of the first to tenth aspects, an on-demand SI request is carried in a request message of a two-step RACH procedure.

[0141] In the twelfth aspect, alone or in combination with one or more of the first to eleventh aspects, the on-demand SI request is carried in at least one of the preamble of the request message of the two-step RACH process, the payload of the request message of the two-step RACH process, or a combination thereof.

[0142] In a thirteenth aspect, alone or in combination with one or more of the first to twelfth aspects, one or more dedicated parameters defined in the specification for a two-step RACH procedure are used to indicate an on-demand SI request.

[0143] In a fourteenth aspect, alone or in combination with one or more of the first to thirteenth aspects, the on-demand SI request includes an indication of at least one of a UE use case, a UE capability, or a combination thereof.

[0144] In the fifteenth aspect, alone or in combination with one or more of the first to fourteenth aspects, an on-demand SI request is received via a resource set, which resource set is configured at least in part based on: dedicated time resources for RO, dedicated frequency resources for RO, dedicated code resources for RO, dedicated time resources for PO, dedicated frequency resources for PO, dedicated code resources for PO, or a combination thereof.

[0145] In a sixteenth aspect, alone or in combination with one or more of the first to fifteenth aspects, an on-demand SI request is received via a resource set, which resource set is configured at least in part based on one or more dedicated synchronization signal blocks (SSBs) to RACH opportunity (RO) association patterns.

[0146] In a seventeenth aspect, alone or in combination with one or more of the first to sixteenth aspects, the on-demand SI request is received via a dedicated MAC-CE defined by the specification.

[0147] In the eighteenth aspect, alone or in combination with one or more of the first to seventeenth aspects, the on-demand SI request includes a bit map, which includes a bit corresponding to each dedicated on-demand SIB in the dedicated on-demand SIB set, and the bit corresponding to each dedicated on-demand SIB indicates whether the corresponding on-demand SIB will be included in the response to the on-demand SI request or will not be included in the response.

[0148] In a nineteenth aspect, alone or in combination with one or more of the first to eighteenth aspects, a bitmap is defined as a new MAC-CE for transmission of a payload of a request message via a two-step RACH procedure.

[0149] In the twentieth aspect, alone or in combination with one or more of the first to nineteenth aspects, the UE sends an on-demand SI request by multiplexing a new MAC-CE with at least one of a CCCH message, an additional MAC-CE, or a combination thereof.

[0150] In aspect 21, either alone or in combination with one or more of aspects 1 to 20, the on-demand SI request indicates a set of indices corresponding to any one of: a subset of a dedicated on-demand SIB set to be included in a response to the on-demand SI request, or a subset of a dedicated on-demand SIB set to not be included in a response to the on-demand SI request.

[0151] In a twenty-second aspect, alone or in combination with one or more of the first to twenty-first aspects, an on-demand SI request is received via UCI.

[0152] In a twenty-third aspect, alone or in combination with one or more of the first to twenty-second aspects, the UE sends an on-demand SI request by piggybacking UCI on a PUSCH message of a four-step RACH procedure.

[0153] In a twenty-fourth aspect, alone or in combination with one or more of the first to twenty-third aspects, the UE sends an on-demand SI request by piggybacking UCI on a PUSCH part of a request message of a two-step RACH procedure.

[0154] In the twenty-fifth aspect, alone or in combination with one or more of the first to twenty-fourth aspects, the UE sends an on-demand SI request by sending UCI using PUCCH, and the on-demand SI request is multiplexed with the HARQ-ACK sent by the contention resolution message based at least in part on the four-step RACH process.

[0155] In the twenty-sixth aspect, alone or in combination with one or more of the first to twenty-fifth aspects, the UE sends an on-demand SI request by sending UCI using PUCCH, and the on-demand SI request is multiplexed with the HARQ-ACK sent by the response message based at least in part on the two-step RACH process.

[0156] In the twenty-seventh aspect, alone or in combination with one or more of the first to twenty-sixth aspects, the UE sends an on-demand SI request by sending UCI using PUCCH, and the on-demand SI request is multiplexed with at least one of a scheduling request, a channel state information report, or a combination thereof.

[0157] In a twenty-eighth aspect, alone or in combination with one or more of the first to twenty-seventh aspects, the on-demand SI request identifies one or more on-demand SIBs, and sending one or more on-demand dedicated SIBs includes sending a unicast transmission based at least in part on the on-demand SI request.

[0158] In the twenty-ninth aspect, alone or in combination with one or more of the first to twenty-eight aspects, the on-demand SI request identifies a subset of the dedicated on-demand SIB set, and sending one or more on-demand dedicated SIBs includes sending a multicast transmission based at least in part on the on-demand SI request and additional on-demand SI requests from additional UEs.

[0159] In the thirtieth aspect, alone or in combination with one or more of aspects one to twenty-ninth, the on-demand SI request identifies a UE category associated with the UE, and sending one or more on-demand dedicated SIBs includes sending a multicast transmission based at least in part on the on-demand SI request and additional on-demand SI requests from additional UEs, wherein the additional on-demand SI requests indicate that the UE category is associated with the additional UE.

[0160] although Fig. 9 Example blocks of process 900 are shown, but in some aspects, process 900 may include more Fig. 9 The blocks depicted in the process 900 may be more blocks, fewer blocks, different blocks, or blocks in a different arrangement. Additionally or alternatively, two or more of the blocks in the process 900 may be executed in parallel.

[0161] The following provides an overview of various aspects of the disclosure:

[0162] Aspect 1: A wireless communication method performed by a user equipment (UE), comprising receiving an indication of scheduling information of dedicated on-demand system information (SI) from a base station, wherein the dedicated on-demand system information includes information corresponding to a specified UE category, wherein the indication is carried in at least one of the following: minimum system information (MSI) communication, radio resource control (RRC) message, response message of a two-step random access channel (RACH) process, random access response (RAR) message of a four-step RACH process, contention resolution message of a four-step RACH process, message type flag indicating transmission of dedicated on-demand SI, or a combination thereof; sending an on-demand SI request to the base station based at least in part on the scheduling information and the UE category; and receiving one or more on-demand SIBs in a dedicated on-demand system information block (SIB) set from the base station and based at least in part on the on-demand SI request.

[0163] Aspect 2: According to the method of Aspect 1, the MSI communication includes: a traditional master information block (MIB); a dedicated MIB, wherein the dedicated MIB includes information corresponding to a specified UE category; a traditional system information block 1 (SIB1); a dedicated SIB1, wherein the dedicated SIB1 includes information corresponding to a specified UE category; or a combination thereof.

[0164] Aspect 3: A method according to Aspect 2, wherein the dedicated MIB includes a traditional MIB modified in the following manner: using one or more previously unused bits to carry information corresponding to a specified UE category; adding one or more new data fields, wherein the one or more new data fields carry information corresponding to the specified UE category; adding one or more new information elements (IE), wherein the one or more new IEs carry information corresponding to the specified UE category; configuring a different value range for one or more existing data fields of the traditional MIB; configuring the MIB message type flag to indicate a new dedicated MIB transmission; or a combination thereof.

[0165] Aspect 4: The method according to aspect 3, wherein the designated UE category comprises a reduced capability UE device type.

[0166] Aspect 5: The method according to aspect 2, wherein the dedicated MIB includes a new MIB defined in the specification and a MIB message type flag multiplexed with the content of the new MIB.

[0167] Aspect 6: A method according to any one of Aspects 2-5, wherein the dedicated SIB1 includes a traditional SIB1 modified in the following manner: using one or more previously unused bits to carry information corresponding to a specified UE category; adding one or more new data fields, wherein the one or more new data fields carry information corresponding to a specified UE category; adding one or more new information elements (IE), wherein the one or more new IEs carry information corresponding to the specified UE category; configuring different value ranges for one or more existing data fields of the traditional SIB1; configuring the SIB1 message type flag to indicate a new dedicated SIB1 transmission; or a combination thereof.

[0168] Aspect 7: The method according to aspect 6, wherein the designated UE category includes a new set of UE capabilities designated for a reduced capability device type.

[0169] Aspect 8: The method according to any one of aspects 2-5, wherein the SIB1 includes a new SIB1 defined in the specification and a SIB1 message type flag multiplexed with the content of the new SIB1.

[0170] Aspect 9: A method according to any one of Aspects 2-8, wherein the information corresponding to the specified UE category includes at least one of the following: an indication of at least one of a repetition pattern or a frequency hopping pattern for repeated transmission to the UE, a SIB transmission window configuration including at least one of a period or a time offset relative to a system frame number (SFN), an index to a control resource set lookup table, a SIB message type flag indicating the transmission of a new SIB for the specified UE category, or a combination thereof.

[0171] Aspect 10: A method according to any one of Aspects 2-9, wherein an indication of scheduling information for dedicated on-demand SI is carried in at least one of the following: an enhanced SIB1 information element (IE) configured to carry SI scheduling information; a dedicated IE, wherein the dedicated IE is mapped to at least one of SIB1, dedicated SIB1 or a combination thereof; or a combination thereof.

[0172] Aspect 11: The method according to aspect 10, wherein the mapping of dedicated IEs to SIB1, dedicated SIB1, or a combination thereof is established based at least in part on the priority associated with the dedicated on-demand SI.

[0173] Aspect 12: The method according to any one of aspects 1-11, wherein the on-demand SI request is carried in a request message of the two-step RACH procedure.

[0174] Aspect 13: The method according to Aspect 12, wherein the on-demand SI request is carried in at least one of a preamble of a request message of a two-step RACH procedure, a payload of a request message of a two-step RACH procedure, or a combination thereof.

[0175] Aspect 14: The method according to any of aspects 12 or 13, wherein the on-demand SI request is indicated using one or more dedicated parameters defined in the specification for the two-step RACH procedure.

[0176] Aspect 15: The method according to any one of aspects 1-14, wherein the on-demand SI request includes an indication of at least one of a UE use case, a UE capability, or a combination thereof.

[0177] Aspect 16: A method according to any one of Aspects 1-15, wherein a resource set is used to send an on-demand SI request, wherein the resource set is configured at least in part based on: dedicated time resources for RACH opportunity (RO), dedicated frequency resources for RO, dedicated code resources for RO, dedicated time resources for physical uplink shared channel (PUSCH) opportunity (PO), dedicated frequency resources for PO, dedicated code resources for PO, or a combination thereof.

[0178] Aspect 17: A method according to any one of aspects 1-16, wherein the on-demand SI request is sent using a resource set, wherein the resource set is configured at least in part based on one or more dedicated synchronization signal blocks (SSBs) to RACH opportunity (RO) association patterns.

[0179] Aspect 18: The method according to any of aspects 1-17, wherein the on-demand SI request is sent using a dedicated medium access control (MAC) control element (CE) defined by the specification.

[0180] Aspect 19: A method according to any one of Aspects 1-18, wherein the on-demand SI request includes a bit map, which includes a bit corresponding to each dedicated on-demand SIB in the dedicated on-demand SIB set, wherein the bit corresponding to each dedicated on-demand SIB indicates whether the corresponding on-demand SIB is included in the response to the on-demand SI request or not included in the response.

[0181] Aspect 20: The method according to aspect 19, wherein the bitmap is defined as a new medium access control (MAC) control element (MAC-CE) for transmission of a payload of a request message via a two-step RACH procedure.

[0182] Aspect 21: The method according to aspect 20, wherein sending the on-demand SI request includes multiplexing the new MAC-CE with at least one of a common control channel (CCCH) message, an additional MAC-CE, or a combination thereof.

[0183] Aspect 22: A method according to any one of Aspects 19-21, wherein the on-demand SI request indicates an index set corresponding to any one of the following items: a subset of the dedicated on-demand SIB set to be included in the response to the on-demand SI request, or a subset of the dedicated on-demand SIB set to be not included in the response to the on-demand SI request.

[0184] Aspect 23: The method according to any one of aspects 1-22, wherein the on-demand SI request is sent using uplink control information (UCI).

[0185] Aspect 24: The method according to Aspect 23, wherein sending the on-demand SI request includes piggybacking the UCI on a physical uplink shared channel (PUSCH) message of a four-step RACH procedure.

[0186] Aspect 25: The method according to aspect 23, wherein sending the on-demand SI request includes piggybacking the UCI on a physical uplink shared channel (PUSCH) portion of the request message of the two-step RACH procedure.

[0187] Aspect 26: A method according to Aspect 23, wherein sending an on-demand SI request includes sending UCI using a physical uplink control channel (PUCCH), wherein the on-demand SI request is multiplexed with a hybrid automatic repeat request acknowledgment (HARQ-ACK) sent based at least in part on a contention resolution message of a four-step RACH process.

[0188] Aspect 27: A method according to Aspect 23, wherein sending an on-demand SI request includes sending UCI using a physical uplink control channel (PUCCH), wherein the on-demand SI request is multiplexed with a hybrid automatic repeat request acknowledgment (HARQ-ACK) sent at least in part based on a response message of a two-step RACH process.

[0189] Aspect 28: The method according to aspect 23, wherein sending the on-demand SI request includes sending UCI using a physical uplink control channel (PUCCH), wherein the on-demand SI request is multiplexed with at least one of a scheduling request, a channel state information report, or a combination thereof.

[0190] Aspect 29: The method according to any of aspects 1-28, wherein the on-demand SI request identifies one or more on-demand SIBs, and wherein receiving the one or more on-demand dedicated SIBs comprises receiving a unicast transmission based at least in part on the on-demand SI request.

[0191] Aspect 30: A method according to any of aspects 1-28, wherein the on-demand SI request identifies a subset of the dedicated on-demand SIB set, and wherein receiving one or more on-demand dedicated SIBs includes receiving a multicast transmission based at least in part on the on-demand SI request and additional on-demand SI requests from additional UEs.

[0192] Aspect 31: A method according to any one of Aspects 1-28, wherein the on-demand SI request identifies a UE category associated with the UE, and wherein receiving one or more on-demand dedicated SIBs includes receiving a multicast transmission based at least in part on the on-demand SI request and an additional on-demand SI request from an additional UE, wherein the additional on-demand SI request indicates that the UE category is associated with the additional UE.

[0193] Aspect 32: A method of wireless communication performed by a base station, comprising: sending an indication of scheduling information of dedicated on-demand system information (SI) to a user equipment (UE), wherein the dedicated on-demand system information includes information corresponding to a specified UE category, wherein the indication is carried in at least one of the following: minimum system information (MSI) communication, radio resource control (RRC) message, response message of a two-step random access channel (RACH) process, random access response (RAR) message of a four-step RACH process, contention resolution message of a four-step RACH process, a message type flag indicating transmission of dedicated on-demand SI, or a combination thereof; receiving an on-demand SI request from the UE based at least in part on the scheduling information and the UE category; and sending one or more on-demand SIBs in a dedicated on-demand system information block (SIB) set to the UE and based at least in part on the on-demand SI request.

[0194] Aspect 33: A method according to Aspect 32, wherein the MSI communication includes: a traditional master information block (MIB); a dedicated MIB, wherein the dedicated MIB includes information corresponding to a specified UE category; a traditional system information block 1 (SIB1); a dedicated SIB1, wherein the dedicated SIB1 includes information corresponding to a specified UE category; or a combination thereof.

[0195] Aspect 34: A method according to Aspect 33, wherein the dedicated MIB includes a traditional MIB modified in the following manner: using one or more previously unused bits to carry information corresponding to a specified UE category; adding one or more new data fields, wherein the one or more new data fields carry information corresponding to a specified UE category; adding one or more new information elements (IEs), wherein the one or more new IEs carry information corresponding to the specified UE category; configuring a different value range for one or more existing data fields of the traditional MIB; configuring the MIB message type flag to indicate a new dedicated MIB transmission; or a combination thereof.

[0196] Aspect 35: The method according to any one of aspects 33 or 34, wherein the specified UE category comprises a reduced capability UE device type.

[0197] Aspect 36: The method according to Aspect 33, wherein the dedicated MIB includes a new MIB defined in the specification and a MIB message type flag indicating transmission of the new MIB.

[0198] Aspect 37: A method according to any one of Aspects 33-36, wherein the dedicated SIB1 includes a traditional SIB1 modified by: using one or more previously unused bits to carry information corresponding to a specified UE category; adding one or more new data fields, wherein the one or more new data fields carry information corresponding to a specified UE category; adding one or more new information elements (IEs), wherein the one or more new IEs carry information corresponding to the specified UE category; configuring a different value range for one or more existing data fields of the traditional SIB1; configuring the SIB1 message type flag to indicate a new dedicated SIB1 transmission; or a combination thereof.

[0199] Aspect 38: The method according to Aspect 37, wherein the designated UE category comprises a reduced capability UE device type.

[0200] Aspect 39: The method according to any one of aspects 33-36, wherein the dedicated SIB1 comprises a new SIB1 defined in the specification and a SIB1 message type flag indicating transmission of the new SIB1.

[0201] Aspect 40: A method according to any one of Aspects 33-39, wherein the information corresponding to the specified UE category includes at least one of the following: an indication of at least one of a repetition pattern or a frequency hopping pattern for repeated transmission to the UE, a SIB transmission window configuration including at least one of a period or a time offset relative to a system frame number (SFN), an index to a control resource set lookup table, a SIB message type flag indicating the transmission of a new SIB for the specified UE category, or a combination thereof.

[0202] Aspect 41: A method according to any one of Aspects 33-40, wherein an indication of scheduling information for dedicated on-demand SI is carried in at least one of: an enhanced SIB1 information element (IE) configured to carry SI scheduling information; a dedicated IE, wherein the dedicated IE is mapped to at least one of SIB1, dedicated SIB1 or a combination thereof; or a combination thereof.

[0203] Aspect 42: The method according to Aspect 41, wherein the mapping of dedicated IEs to SIB1, dedicated SIB1, or a combination thereof is established based at least in part on the priority associated with the dedicated on-demand SI.

[0204] Aspect 43: A method according to any one of aspects 32-42, wherein the on-demand SI request is carried in a request message of the two-step RACH procedure.

[0205] Aspect 44: The method according to Aspect 43, wherein the on-demand SI request is carried in at least one of a preamble of a request message of a two-step RACH procedure, a payload of a request message of a two-step RACH procedure, or a combination thereof.

[0206] Aspect 45: A method according to any of aspects 32-44, wherein the on-demand SI request is indicated using one or more dedicated parameters defined in the specification for the two-step RACH procedure.

[0207] Aspect 46: The method according to any of aspects 32-45, wherein the on-demand SI request comprises an indication of at least one of a UE use case, a UE capability, or a combination thereof.

[0208] Aspect 47: A method according to any one of Aspects 32-46, wherein an on-demand SI request is received via a resource set, wherein the resource set is configured at least in part based on: dedicated time resources for RACH opportunity (RO), dedicated frequency resources for RO, dedicated code resources for RO, dedicated time resources for physical uplink shared channel (PUSCH) opportunity (PO), dedicated frequency resources for PO, dedicated code resources for PO, or a combination thereof.

[0209] Aspect 48: A method according to any of aspects 32-47, wherein the on-demand SI request is received via a resource set, wherein the resource set is configured at least in part based on one or more dedicated synchronization signal blocks (SSBs) to RACH opportunity (RO) association patterns.

[0210] Aspect 49: The method according to any of aspects 32-48, wherein the on-demand SI request is received via a dedicated medium access control (MAC) control element (CE) defined by the specification.

[0211] Aspect 50: A method according to aspect claim 49, wherein the on-demand SI request includes a bit map, the bit map including a bit corresponding to each dedicated on-demand SIB in the dedicated on-demand SIB set, wherein the bit corresponding to each dedicated on-demand SIB indicates whether the corresponding on-demand SIB will be included in a response to the on-demand SI request or will not be included in the response.

[0212] Aspect 51: The method according to aspect 50, wherein a bitmap is defined as a new MAC-CE for transmission of a payload of a request message via a two-step RACH procedure.

[0213] Aspect 52: The method according to aspect 51, wherein the UE sends the on-demand SI request by multiplexing the new MAC-CE with at least one of a common control channel (CCCH) message, an additional MAC-CE, or a combination thereof.

[0214] Aspect 53: A method according to any one of Aspects 49-52, wherein the on-demand SI request indicates an index set corresponding to any one of the following items: a subset of the dedicated on-demand SIB set to be included in the response to the on-demand SI request, or a subset of the dedicated on-demand SIB set to be not included in the response to the on-demand SI request.

[0215] Aspect 54: The method according to any of aspects 32-53, wherein the on-demand SI request is received via uplink control information (UCI).

[0216] Aspect 55: The method according to aspect 54, wherein the UE sends the on-demand SI request by piggybacking the UCI on a physical uplink shared channel (PUSCH) message of a four-step RACH procedure.

[0217] Aspect 56: The method according to aspect 54, wherein the UE sends the on-demand SI request by piggybacking the UCI on a physical uplink shared channel (PUSCH) part of the request message of the two-step RACH procedure.

[0218] Aspect 57: A method according to Aspect 54, wherein the UE sends UCI by using a physical uplink control channel (PUCCH), wherein the on-demand SI request is multiplexed with a hybrid automatic repeat request acknowledgment (HARQ-ACK) sent at least in part based on a contention resolution message of a four-step RACH process to send the on-demand SI request.

[0219] Aspect 58: A method according to Aspect 54, wherein the UE sends UCI by using a physical uplink control channel (PUCCH), wherein the on-demand SI request is multiplexed with a hybrid automatic repeat request acknowledgment (HARQ-ACK) sent at least in part based on a response message of a two-step RACH process to send the on-demand SI request.

[0220] Aspect 59: The method according to aspect 54, wherein the UE sends UCI by using a physical uplink control channel (PUCCH), wherein the on-demand SI request is multiplexed with at least one of a scheduling request, a channel state information report, or a combination thereof to send the on-demand SI request.

[0221] Aspect 60: The method according to any of aspects 32-59, wherein the on-demand SI request identifies one or more on-demand SIBs, and wherein sending the one or more on-demand dedicated SIBs comprises sending a unicast transmission based at least in part on the on-demand SI request.

[0222] Aspect 61: The method according to any of aspects 32-59, wherein the on-demand SI request identifies a subset of the dedicated on-demand SIB set, and wherein sending one or more on-demand dedicated SIBs includes sending a multicast transmission based at least in part on the on-demand SI request and additional on-demand SI requests from additional UEs.

[0223] Aspect 62: A method according to any of Aspects 32-59, wherein the on-demand SI request identifies a UE category associated with the UE, and wherein sending one or more on-demand dedicated SIBs includes sending a multicast transmission based at least in part on the on-demand SI request and additional on-demand SI requests from additional UEs, wherein the additional on-demand SI requests indicate that the UE category is associated with the additional UE.

[0224] Aspect 63: An apparatus for wireless communication at a device, comprising a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform the method of one or more aspects of aspects 1-31.

[0225] Aspect 64: An apparatus for wireless communication, comprising a memory and one or more processors coupled to the memory, the memory and the one or more processors being configured to perform the method of one or more aspects of aspects 1-31.

[0226] Aspect 65: An apparatus for wireless communication, comprising at least one component for performing the method of one or more of aspects 1-31.

[0227] Aspect 66: A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to perform the method of one or more aspects of aspects 1-31.

[0228] Aspect 67: A non-transitory computer-readable medium storing an instruction set for wireless communication, the instruction set comprising one or more instructions which, when executed by one or more processors of a device, cause the device to perform the method of one or more aspects of aspects 1-31.

[0229] Aspect 68: An apparatus for wireless communication at a device, comprising a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform the method of one or more aspects of aspects 32-62.

[0230] Aspect 69: An apparatus for wireless communication, comprising a memory and one or more processors coupled to the memory, the memory and the one or more processors configured to perform the method of one or more aspects of aspects 32-62.

[0231] Aspect 70: An apparatus for wireless communication, comprising at least one component for performing the method of one or more of aspects 32-62.

[0232] Aspect 71: A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to perform the method of one or more aspects of aspects 32-62.

[0233] Aspect 72: A non-transitory computer-readable medium storing an instruction set for wireless communication, the instruction set comprising one or more instructions which, when executed by one or more processors of a device, cause the device to perform the method of one or more aspects of aspects 32-62.

[0234] The above disclosure provides illustration and description, but is not intended to be exhaustive or to limit the aspects to the precise forms disclosed. Modifications and variations may be made in light of the above disclosure or may be acquired from practice of the various aspects.

[0235] As used herein, the term "component" is intended to be broadly interpreted as hardware, firmware, and / or a combination of hardware and software. As used herein, a processor is implemented in hardware, firmware, and / or a combination of hardware and software.

[0236] As used herein, satisfying a threshold may refer to a value being greater than a threshold, greater than or equal to a threshold, less than a threshold, less than or equal to a threshold, equal to a threshold, not equal to a threshold, etc., depending on the context.

[0237] It is clear that the systems and / or methods described herein can be implemented using various forms of hardware, firmware, and / or combinations of hardware and software. The actual specialized control hardware or software code used to implement these systems and / or methods does not limit the aspects. Thus, the operation and behavior of the systems and / or methods are described herein without reference to specific software code—it is understood that software and hardware can be designed to implement the systems and / or methods, based at least in part on the description herein.

[0238] Even if a particular combination of features is described in the claims and / or disclosed in the specification, these combinations are not intended to limit the disclosure of the various aspects. In fact, many of these features can be combined in a manner that is not specifically described in the claims and / or not specifically disclosed in the specification. Although each of the listed dependent claims may only be directly subordinate to one claim, the disclosure of the various aspects includes the combination of each dependent claim with each other claim in the claim set. The phrase referring to "at least one of" a list of items refers to any combination of those items, including single members. As an example, "at least one of a, b or c" is intended to cover a, b, c, ab, ac, bc and abc, as well as any combination with multiple identical elements (e.g., aa, aaa, aab, aac, abb, acc, bb, bbb, bbc, cc and ccc or any other arrangement of a, b and c).

[0239] Unless explicitly described as critical or essential, any element, behavior or instruction used herein should not be understood as critical or essential. In addition, as used herein, the articles "one" and "an" are intended to include one or more items and can be used interchangeably with "one or more". In addition, as used herein, the terms "set" and "group" are intended to include one or more items (e.g., related items, unrelated items, combinations of related and unrelated items, etc.), and can be used interchangeably with "one or more". If only for one item, the phrase "only one" or similar language is used. In addition, as used herein, the terms "have", "have", "with" and / or similar terms are intended to be open-ended terms. In addition, unless otherwise expressly stated, the phrase "based on" means "based at least in part on".

Claims

1. A user equipment UE for wireless communication, comprising: Memory; as well as one or more processors coupled to the memory, the memory and the one or more processors being configured to: Receiving, from a base station, an indication of scheduling information of dedicated on-demand system information SI, wherein the dedicated on-demand system information SI includes information corresponding to a specified UE category, the specified UE category being related to a bandwidth capability for receiving a downlink signal / channel, wherein the indication is carried in at least one of the following: Minimum System Information (MSI) communication, Radio Resource Control RRC messages, Response message of the two-step random access channel RACH process, The random access response RAR message of the four-step RACH process, Contention resolution message for the four-step RACH process, a message type flag indicating the transmission of the dedicated on-demand SI, or their combination; sending an on-demand SI request to a base station based at least in part on the scheduling information and the specified UE category; and One or more on-demand SIBs in a dedicated on-demand system information block (SIB) set are received from a base station and based at least in part on the on-demand SI request.

2. The UE according to claim 1, wherein: The specified UE category comprises a reduced capability UE device type, and wherein the MSI communication comprises: Traditional master information block MIB, a dedicated MIB, wherein the dedicated MIB includes information corresponding to the specified UE category, Traditional system information block 1 SIB1, A dedicated SIB1, wherein the dedicated SIB1 includes information corresponding to the specified UE category, or A combination of them.

3. The UE according to claim 2, wherein: The dedicated MIB includes the traditional MIB modified in the following ways: using one or more previously unused bits to carry information corresponding to the specified UE category, adding one or more new data fields, wherein the one or more new data fields carry information corresponding to the specified UE category, Add one or more new information elements IE, wherein the one or more new IE carries information corresponding to the specified UE category, configuring different value ranges for one or more existing data fields of the traditional MIB, Configure the MIB message type flags to indicate a new private MIB transmission, or A combination of them.

4. The UE according to claim 2, wherein: The dedicated MIB includes a new MIB defined in the specification and a MIB message type flag multiplexed with the content of the new MIB.

5. The UE according to claim 2, wherein: The dedicated SIB1 includes the conventional SIB1 modified in the following ways: using one or more previously unused bits to carry information corresponding to a specified UE category, wherein the specified UE category includes a new set of UE capabilities specified for a reduced capability UE device type, adding one or more new data fields, wherein the one or more new data fields carry information corresponding to the specified UE category, Add one or more new information elements IE, wherein the one or more new IE carries information corresponding to the specified UE category, Configuring different value ranges for one or more existing data fields of legacy SIB1, Configure the SIB1 message type flag to indicate a new dedicated SIB1 transmission, or A combination of them.

6. The UE according to claim 2, wherein: The dedicated SIB1 includes a new SIB1 defined in the specification and a SIB1 message type flag multiplexed with the content of the new SIB1.

7. The UE according to claim 2, wherein: The information corresponding to the specified UE category includes at least one of the following: an indication of at least one of a repetition pattern or a frequency hopping pattern for repeating transmissions to the UE, SIB transmission window configuration, including at least one of a period or a time offset relative to a system frame number SFN, Controls the indexing of the resource set lookup table, a SIB message type flag indicating the transmission of a new SIB for the specified UE category, or A combination of them.

8. The UE according to claim 2, wherein: An indication of scheduling information for dedicated on-demand SI is carried in at least one of the following: An enhanced SIB1 information element IE configured to carry SI scheduling information, a dedicated IE, wherein the dedicated IE is mapped to at least one of SIB1, dedicated SIB1, or a combination thereof by mapping, wherein the mapping is established at least in part based on a priority associated with the dedicated on-demand SI, A combination of them.

9. The UE according to claim 1, wherein: The on-demand SI request is carried in at least one of the following: The preamble of the request message of the two-step RACH procedure, The payload of the request message of the two-step RACH procedure, or A combination of them.

10. The UE according to claim 9, wherein: The on-demand SI request is indicated using one or more dedicated parameters defined in the specification for the two-step RACH procedure.

11. The UE according to claim 1, wherein: The on-demand SI request includes an indication of at least one of a UE use case, a UE capability, or a combination thereof.

12. The UE according to claim 1, wherein: The on-demand SI request is sent using a resource set, wherein the resource set is configured based at least in part on: Dedicated time resource for RACH timing RO, a dedicated frequency resource for said RO, a dedicated code resource for the RO, Dedicated time resources for physical uplink shared channel PUSCH opportunities PO, Dedicated frequency resources for said PO, A dedicated code resource for the PO, or A combination of them.

13. The UE according to claim 1, wherein: The on-demand SI request is sent using a resource set, wherein the resource set is configured at least in part based on one or more dedicated synchronization signal blocks (SSB) to RACH opportunity (RO) association patterns.

14. The UE according to claim 1, wherein: The on-demand SI request is sent using a dedicated Medium Access Control MAC control element CE defined by the specification.

15. The UE according to claim 14, wherein: The on-demand SI request comprises a bit map comprising a bit corresponding to each dedicated on-demand SIB in the dedicated on-demand SIB set, wherein the bit corresponding to each dedicated on-demand SIB indicates whether the corresponding on-demand SIB will be included in a response to the on-demand SI request or will not be included in the response.

16. The UE according to claim 15, wherein: The bitmap is defined as a new MAC-CE for transmission of a payload of a request message via a two-step RACH procedure.

17. The UE according to claim 16, wherein: When sending the SI-on-demand request, the memory and the one or more processors are configured to multiplex the new MAC-CE with at least one of a common control channel CCCH message, an additional MAC-CE, or a combination thereof.

18. The UE according to claim 14, wherein: The on-demand SI request indicates an index set corresponding to any one of the following: a subset of the dedicated on-demand SIB set to be included in the response to the on-demand SI request, or A subset of the dedicated on-demand SIB set that will not be included in the response to the on-demand SI request.

19. The UE according to claim 1, wherein: The on-demand SI request is sent using uplink control information UCI, and wherein, when sending the on-demand SI request, the memory and the one or more processors are configured to carry the UCI on a physical uplink shared channel PUSCH message of a four-step RACH process.

20. The UE according to claim 1, wherein: The on-demand SI request is sent using uplink control information UCI, and wherein, when sending the on-demand SI request, the memory and the one or more processors are configured to carry the UCI on a physical uplink shared channel PUSCH part of a request message of a two-step RACH process.

21. The UE according to claim 1, wherein: The on-demand SI request is sent using uplink control information UCI, and wherein, when sending the on-demand SI request, the memory and the one or more processors are configured to send the UCI using a physical uplink control channel PUCCH, wherein the on-demand SI request is multiplexed with a hybrid automatic repeat request confirmation HARQ-ACK sent at least in part based on a contention resolution message of a four-step RACH process.

22. The UE according to claim 1, wherein: The on-demand SI request is sent using uplink control information UCI, and wherein, when sending the on-demand SI request, the memory and the one or more processors are configured to send the UCI using a physical uplink control channel PUCCH, wherein the on-demand SI request is multiplexed with a hybrid automatic repeat request confirmation HARQ-ACK sent at least in part based on a response message of a two-step RACH process.

23. The UE according to claim 1, wherein: The on-demand SI request is sent using uplink control information UCI, and when sending the on-demand SI request, the memory and the one or more processors are configured to send the UCI using a physical uplink control channel PUCCH, wherein the on-demand SI request is multiplexed with at least one of a scheduling request, a channel state information report, or a combination thereof.

24. The UE according to claim 1, wherein: The on-demand SI request identifies the one or more on-demand SIBs, and wherein, upon receiving the one or more on-demand dedicated SIBs, the memory and the one or more processors are configured to receive a unicast transmission based at least in part on the on-demand SI request.

25. The UE according to claim 1, wherein: The on-demand SI request identifies a subset of the dedicated on-demand SIB set, and wherein, when receiving the one or more on-demand dedicated SIBs, the memory and the one or more processors are configured to receive a multicast transmission based at least in part on the on-demand SI request and additional on-demand SI requests from additional UEs.

26. The UE according to claim 1, wherein: The on-demand SI request identifies a UE category associated with the UE, and wherein, when receiving the one or more on-demand dedicated SIBs, the memory and the one or more processors are configured to receive a multicast transmission based at least in part on the on-demand SI request and an additional on-demand SI request from an additional UE, wherein the additional on-demand SI request indicates that the UE category is associated with the additional UE.

27. A base station for wireless communication, comprising: Memory; as well as one or more processors coupled to the memory, the memory and the one or more processors being configured to: An indication of scheduling information of dedicated on-demand system information SI is sent to a user equipment UE, wherein the dedicated on-demand system information includes information corresponding to a specified UE category, the specified UE category is related to the bandwidth capability of receiving a downlink signal / channel, wherein the indication is carried in at least one of the following: Minimum System Information (MSI) communication, Radio Resource Control RRC messages, Response message of the two-step random access channel RACH process, The random access response RAR message of the four-step RACH process, Contention resolution message for the four-step RACH process, a message type flag indicating the transmission of the dedicated on-demand SI, or their combination; receiving an on-demand SI request from a UE based at least in part on the scheduling information; and One or more on-demand SIBs in a dedicated on-demand system information block (SIB) set are sent to the UE based at least in part on the on-demand SI request.

28. The base station according to claim 27, wherein: The on-demand SI request identifies the one or more on-demand SIBs, and wherein, when sending the one or more on-demand dedicated SIBs, the memory and the one or more processors are configured to send a unicast transmission based at least in part on the on-demand SI request.

29. The base station according to claim 27, wherein: The on-demand SI request identifies a subset of the dedicated on-demand SIB set, and wherein, when sending the one or more on-demand dedicated SIBs, the memory and the one or more processors are configured to send a multicast transmission based at least in part on the on-demand SI request and additional on-demand SI requests from additional UEs.

30. The base station according to claim 27, wherein: The on-demand SI request identifies a UE category associated with the UE, and wherein, when sending the one or more on-demand dedicated SIBs, the memory and the one or more processors are configured to send a multicast transmission based at least in part on the on-demand SI request and an additional on-demand SI request from an additional UE, wherein the additional on-demand SI request indicates that the UE category is associated with the additional UE.

31. A wireless communication method performed by a user equipment UE, comprising: Receiving, from a base station, an indication of scheduling information of dedicated on-demand system information SI, wherein the dedicated on-demand system information SI includes information corresponding to a specified UE category, the specified UE category being related to a bandwidth capability for receiving a downlink signal / channel, wherein the indication is carried in at least one of the following: Minimum System Information (MSI) communication, Radio Resource Control RRC messages, Response message of the two-step random access channel RACH process, The random access response RAR message of the four-step RACH process, Contention resolution message for the four-step RACH process, a message type flag indicating the transmission of the dedicated on-demand SI, or their combination; sending an on-demand SI request to a base station based at least in part on the scheduling information and the specified UE category; and One or more on-demand SIBs in a dedicated on-demand system information block (SIB) set are received from a base station and based at least in part on the on-demand SI request.

32. A wireless communication method performed by a base station, comprising: An indication of scheduling information of dedicated on-demand system information SI is sent to a user equipment UE, wherein the dedicated on-demand system information includes information corresponding to a specified UE category, the specified UE category is related to the bandwidth capability of receiving a downlink signal / channel, wherein the indication is carried in at least one of the following: Minimum System Information (MSI) communication, Radio Resource Control RRC messages, Response message of the two-step random access channel RACH process, The random access response RAR message of the four-step RACH process, Contention resolution message for the four-step RACH process, a message type flag indicating the transmission of the dedicated on-demand SI, or their combination; receiving an on-demand SI request from a UE based at least in part on the scheduling information; and One or more on-demand SIBs in a dedicated on-demand system information block (SIB) set are sent to the UE based at least in part on the on-demand SI request.

33. A non-transitory computer-readable medium having one or more computer-executable instructions stored thereon, which, when executed by one or more processors of a user equipment (UE), cause the one or more processors to perform the method according to claim 31.

34. A non-transitory computer readable medium having stored thereon one or more computer executable instructions which, when executed by one or more processors of a base station, cause the one or more processors to perform the method of claim 32.

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