Techniques for adaptively requesting on-demand system information

Abstract

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may be configured to receive first system information from a base station, the first system information being for a reduced capability UE including a UE having a bandwidth capability below a threshold, the UE being a reduced capability UE. The UE may evaluate the first system information for a dedicated field, the dedicated field including an indicator that additional system information for the reduced capability UE will be received in response to an on-demand request. Subsequently, when the dedicated field is included in the first system information, the UE may obtain the additional system information for the reduced capability UE based on the information included in the dedicated field, or when the dedicated field is missing in the first system information, the UE may obtain the additional system information for the reduced capability UE based on the information included in a configuration information element of the first system information.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This patent application claims the benefit of U.S. Provisional Patent Application No. 63 / 084,441, entitled “TECHNIQUES FOR ADAPTATIVELY REQUESTING ON-DEMAND SYSTEM INFORMATION,” filed by LEI et al. on September 28, 2020, and U.S. Patent Application No. 17 / 466,915, entitled “TECHNIQUES FOR ADAPTATIVELY REQUESTING ON-DEMAND SYSTEM INFORMATION,” filed by LEI et al. on September 3, 2021; each of the above applications is assigned to the assignee of this application. Technical Field

[0003] The following relates to wireless communications, including techniques for adaptively requesting on-demand system information (ODSI). Background Art

[0004] Wireless communication systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcasting, etc. These systems may be able to support communication with multiple users by sharing available system resources (e.g., time, frequency, and power). Examples of such multiple access systems include fourth generation (4G) systems (e.g., long term evolution (LTE) systems, improved LTE (LTE-A) systems, or LTE-A Pro systems) and fifth generation (5G) systems (which may be referred to as new radio (NR) systems). These systems may employ techniques such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal frequency division multiple access (OFDMA), or discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM). A wireless multiple access communication system may include one or more base stations or one or more network access nodes, each base station or network access node simultaneously supporting communication for multiple communication devices (which may be further referred to as user equipment (UE)).

[0005] In some wireless communication systems, a base station may be configured to support both regular, full-capability UEs (e.g., full-bandwidth UEs) and reduced-capability UEs (e.g., reduced-bandwidth UEs). Due to the reduced bandwidth capabilities, the reduced-capability UEs may not be able to receive system information (e.g., master information blocks (MIBs) or system information blocks (SIBs)) broadcasted by the network using a bandwidth that the regular, full-capability UEs can receive. Summary of the invention

[0006] The described technology relates to improved methods, systems, devices and apparatuses for supporting technology for adaptively requesting on-demand system information (ODSI). In general, the described technology relates to signaling that can be used to indicate whether system information for a user equipment (UE) with reduced capabilities can be broadcast on demand. For example, a UE with reduced capabilities can receive first system information for a UE with reduced capabilities or reduced bandwidth (RB). The first system information may include a system information block (RB-SIB1) with reduced bandwidth or a master information block (RB-MIB) with reduced bandwidth, each of which may be received within a synchronization signal block (RB-SSB) with reduced bandwidth. Upon receiving the first system information, the UE may determine whether the first system information includes a dedicated field indicating whether additional system information (e.g., RB-SIB2, RB-SIB3) for the UE with reduced capabilities can be received in response to an on-demand request. If a dedicated field is included in the first system information, the UE may determine whether the additional system information can be received in response to an on-demand request based on the dedicated field. Alternatively, if the dedicated field is not included in the first system information, the UE may determine whether additional system information is receivable in response to an on-demand request based on the configuration information element of the first system information. In this regard, the dedicated field may be used as an efficient early indicator of whether the network is configured for ODSI.

[0007] A method for wireless communication at a UE is described. The method may include: receiving first system information from a base station, the first system information being for a reduced capability UE including a UE having a bandwidth capability below a threshold, the UE being a reduced capability UE; evaluating the first system information for a dedicated field, the dedicated field including an indicator that additional system information for the reduced capability UE will be received in response to an on-demand request; and obtaining the additional system information for the reduced capability UE based on information included in the dedicated field when the dedicated field is included in the first system information, or obtaining the additional system information for the reduced capability UE based on information included in a configuration information element of the first system information when the dedicated field is missing from the first system information.

[0008] An apparatus for wireless communication at a UE is described. The apparatus may include: a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to perform the following operations: receive first system information from a base station, the first system information being for a reduced capability UE including a UE with a bandwidth capability below a threshold, the UE being a reduced capability UE; evaluate the first system information for a dedicated field, the dedicated field including an indicator that additional system information for the reduced capability UE will be received in response to an on-demand request; and obtain the additional system information for the reduced capability UE according to information included in the dedicated field when the dedicated field is included in the first system information, or obtain the additional system information for the reduced capability UE according to information included in a configuration information element of the first system information when the dedicated field is missing from the first system information.

[0009] Another apparatus for wireless communication at a UE is described. The apparatus may include: means for receiving first system information from a base station, the first system information being for a reduced capability UE including a UE having a bandwidth capability below a threshold, the UE being a reduced capability UE; means for evaluating the first system information for a dedicated field, the dedicated field including an indicator that additional system information for the reduced capability UE will be received in response to an on-demand request; and means for obtaining the additional system information for the reduced capability UE based on information included in the dedicated field when the dedicated field is included in the first system information, or based on information included in a configuration information element of the first system information when the dedicated field is missing from the first system information.

[0010] A non-transitory computer-readable medium storing code for wireless communication at a UE is described. The code may include instructions executable by a processor to: receive first system information from a base station, the first system information being for reduced capability UEs including UEs with bandwidth capabilities below a threshold, the UEs being reduced capability UEs; evaluate the first system information for a dedicated field, the dedicated field including an indicator that additional system information for the reduced capability UEs will be received in response to an on-demand request; and obtain the additional system information for the reduced capability UEs based on information included in the dedicated field when the dedicated field is included in the first system information, or obtain the additional system information for the reduced capability UEs based on information included in a configuration information element of the first system information when the dedicated field is missing from the first system information.

[0011] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, obtaining the additional system information for a UE with reduced capability may include operations, features, units, or instructions for performing: determining, based on the information included in the dedicated field or the configuration information element, that the additional system information may be received in response to an on-demand request; and sending a request for the additional system information to the base station based on the information included in the dedicated field or the configuration information element.

[0012] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, obtaining the additional system information for a UE with reduced capability may include operations, features, units, or instructions for performing the following: identifying a system information request mode based on the information included in the dedicated field or the configuration information element; and sending a request for the additional system information to the base station via a resource set associated with a physical random access channel (PRACH), a sounding reference signal (SRS), a physical uplink shared channel (PUSCH), or a physical uplink control channel (PUCCH) based on the system information request mode.

[0013] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, obtaining the additional system information for a UE with reduced capability may include operations, features, units, or instructions for performing: identifying a system information request mode based on the information included in the dedicated field or the configuration information element; and obtaining the additional system information from the base station based on the system information request mode without sending a request for the additional system information.

[0014] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for performing: determining a threshold set for sending a request for the additional system information based on the information included in the dedicated field or the configuration information element; and sending the request for the additional system information to the base station based on determining that the UE satisfies at least one threshold in the threshold set.

[0015] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the dedicated field includes one or more bit fields, and determining the threshold set can be based on one or more values ​​of the one or more bit fields of the dedicated field.

[0016] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the set of thresholds for sending the request for the additional system information includes a first threshold associated with a bandwidth capability of the UE, a second threshold associated with a number of antennas of the UE, a third threshold associated with a signal quality of a signal received at the UE, a fourth threshold associated with a number of requests for the additional system information that the UE can send, or any combination thereof.

[0017] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for performing the following: receiving, via the first system information, an indication of a second downlink bandwidth part (BWP) for obtaining the additional system information, wherein the additional system information may be obtained via the second downlink BWP, wherein the second downlink BWP may be associated with a UE with reduced capability, and wherein the second downlink BWP may be the same as the first downlink BWP or different from the first downlink BWP.

[0018] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for performing the following: sending a request for the additional system information to the base station via an uplink BWP associated with the reduced capability UE, wherein the uplink BWP may be indicated via the first system information.

[0019] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the dedicated field includes one or more bit fields, a first value of a bit field in the one or more bit fields indicating that additional system information for the reduced capability UE may be received in response to an on-demand request, and a second value of the bit field in the one or more bit fields indicating that the additional system information for the reduced capability UE may not be received in response to an on-demand request.

[0020] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for performing the following: determining an additional set of system information for a UE with reduced capability, wherein the additional set of system information may be requested based on the information included in the dedicated field or the configuration information element, wherein the additional set of system information includes a synchronization signal block (SSB), a downlink broadcast reference signal, a control resource set configuration (CORESET), a common search space (CSS) configuration for a random access procedure, paging and system information update information, or any combination thereof; and sending an indication of the additional system information included in the additional system information set to the base station, wherein obtaining the additional system information may be based on sending the indication of the additional system information.

[0021] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for performing the following: determining a set of parameters that the base station can use to send the additional system information based on the information included in the dedicated field or the configuration information element; and sending an indication of one or more parameters included in the parameter set to the base station, wherein obtaining the additional system information can be based on sending the indication of the one or more parameters.

[0022] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the one or more parameters include a modulation and coding scheme (MCS), a code rate, or both.

[0023] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the one or more parameters used to obtain the additional system information may be different than at least one parameter used to receive the first system information.

[0024] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for performing the following: determining a period associated with the additional system information based on the information included in the dedicated field or the configuration information element, wherein obtaining the additional system information may be based on determining the period.

[0025] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the period associated with the additional system information may be different from the period associated with the first system information, and the period associated with the additional system information may be based on information included within the additional system information, the information comprising SSB, downlink broadcast reference signal, CORESET, CSS configuration for random access process, paging and system information update information, or any combination thereof.

[0026] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the first system information includes a first type of system information block (SIB), and the methods, apparatus, and non-transitory computer-readable media may also include operations, features, units, or instructions for performing the following: receiving, via the first system information, an indication of: one or more downlink BWP configurations associated with a UE with reduced capability for receiving the first system information, one or more uplink BWP configurations associated with a UE with reduced capability for sending a request for the additional system information, one or more additional downlink BWP configurations associated with a UE with reduced capability for receiving the additional system information, or any combination thereof.

[0027] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the additional system information includes a second type of SIB that may be different from the first type, a second type of MIB, or a combination thereof.

[0028] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the first system information may be received multiplexed with other system information receivable by other UEs.

[0029] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the first system information may be received via a physical broadcast channel (PBCH) associated with a reduced capability UE, a physical downlink shared channel (PDSCH) associated with a reduced capability UE, or both.

[0030] A method for wireless communication at a base station is described. The method may include: sending first system information to a UE, the first system information being for a reduced capability UE including a UE having a bandwidth capability below a threshold, the UE being a reduced capability UE; evaluating the first system information for a dedicated field, the dedicated field including an indicator that additional system information for the reduced capability UE will be sent in response to an on-demand request; and sending the additional system information for the reduced capability UE according to information included in the dedicated field when the dedicated field is included in the first system information, or sending the additional system information for the reduced capability UE according to information included in a configuration information element of the first system information when the dedicated field is absent in the first system information.

[0031] An apparatus for wireless communication at a base station is described. The apparatus may include: a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to perform the following operations: send first system information to a UE, the first system information being for a reduced capability UE including a UE with a bandwidth capability below a threshold, the UE being a reduced capability UE; evaluate the first system information for a dedicated field, the dedicated field including an indicator that additional system information for the reduced capability UE will be sent in response to an on-demand request; and send the additional system information for the reduced capability UE according to information included in the dedicated field when the dedicated field is included in the first system information, or send the additional system information for the reduced capability UE according to information included in a configuration information element of the first system information when the dedicated field is missing from the first system information.

[0032] Another apparatus for wireless communication at a base station is described. The apparatus may include: means for sending first system information to a UE, the first system information being for a reduced capability UE including a UE having a bandwidth capability below a threshold, the UE being a reduced capability UE; means for evaluating the first system information for a dedicated field, the dedicated field including an indicator that additional system information for the reduced capability UE will be sent in response to an on-demand request; and means for sending the additional system information for the reduced capability UE according to information included in the dedicated field when the dedicated field is included in the first system information, or according to information included in a configuration information element of the first system information when the dedicated field is missing from the first system information.

[0033] A non-transitory computer-readable medium storing code for wireless communication at a base station is described. The code may include instructions executable by a processor to: send first system information to a UE, the first system information being for a reduced capability UE including a UE having a bandwidth capability below a threshold, the UE being a reduced capability UE; evaluate the first system information for a dedicated field, the dedicated field including an indicator that additional system information for the reduced capability UE will be sent in response to an on-demand request; and send the additional system information for the reduced capability UE according to information included in the dedicated field when the dedicated field is included in the first system information, or send the additional system information for the reduced capability UE according to information included in a configuration information element of the first system information when the dedicated field is missing from the first system information.

[0034] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, sending the additional system information for a UE with reduced capability may include operations, features, units, or instructions for performing: determining, based on the information included in the dedicated field or the configuration information element, that the additional system information may be sent in response to an on-demand request; and receiving a request for the additional system information from the UE based on the information included in the dedicated field or the configuration information element.

[0035] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, sending the additional system information for a UE with reduced capability may include operations, features, units, or instructions for performing: identifying a system information request mode based on the information included in the dedicated field or the configuration information element; and receiving a request for the additional system information from the UE via a resource set associated with a PRACH, SRS, PUSCH, or PUCCH based on the system information request mode.

[0036] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, sending the additional system information for a UE with reduced capability may include operations, features, units, or instructions for performing: identifying a system information request mode based on the information included in the dedicated field or the configuration information element; and sending the additional system information from the base station according to the system information request mode without receiving a request for the additional system information.

[0037] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for performing the following: determining a threshold set for sending a request for the additional system information based on the information included in the dedicated field or the configuration information element; and receiving the request for the additional system information from the UE based on the UE satisfying at least one threshold in the threshold set, wherein the threshold set includes a first threshold associated with a bandwidth capability of the UE, a second threshold associated with a number of antennas of the UE, a third threshold associated with a signal quality of a signal received at the UE, a fourth threshold associated with a number of requests for the additional system information that the UE can send, or any combination thereof.

[0038] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the first system information, the additional system information, or both may be received via a downlink BWP associated with a reduced capability UE.

[0039] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, means, or instructions for receiving a request for the additional system information from a reduced capability UE via an uplink BWP associated with the UE.

[0040] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the dedicated field includes one or more bit fields, a first value of a bit field in the one or more bit fields indicating that additional system information for the reduced capability UE may be received in response to an on-demand request, and a second value of the bit field in the one or more bit fields indicating that the additional system information for the reduced capability UE may not be received in response to an on-demand request.

[0041] A method for wireless communication at a UE is described. The method may include: receiving first system information from a base station, the first system information being for a reduced capability UE including a UE having a bandwidth capability below a threshold, the UE being a reduced capability UE; evaluating the first system information for a dedicated field, the dedicated field including an indicator that additional system information for the reduced capability UE will be received in response to an on-demand request; and obtaining the additional system information for the reduced capability UE based on information included in the dedicated field when the dedicated field is included in the first system information, or obtaining the additional system information for the reduced capability UE based on information included in a configuration information element of the first system information when the dedicated field is missing from the first system information.

[0042] An apparatus for wireless communication at a UE is described. The apparatus may include: a processor, a memory in electronic communication with the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to perform the following operations: receive first system information from a base station, the first system information being for a reduced capability UE including a UE with a bandwidth capability below a threshold, the UE being a reduced capability UE; evaluate the first system information for a dedicated field, the dedicated field including an indicator that additional system information for the reduced capability UE will be received in response to an on-demand request; and obtain the additional system information for the reduced capability UE according to information included in the dedicated field when the dedicated field is included in the first system information, or obtain the additional system information for the reduced capability UE according to information included in a configuration information element of the first system information when the dedicated field is missing from the first system information.

[0043] Another apparatus for wireless communication at a UE is described. The apparatus may include: means for receiving first system information from a base station, the first system information being for a reduced capability UE including a UE having a bandwidth capability below a threshold, the UE being a reduced capability UE; means for evaluating the first system information for a dedicated field, the dedicated field including an indicator that additional system information for the reduced capability UE will be received in response to an on-demand request; and means for obtaining the additional system information for the reduced capability UE based on information included in the dedicated field when the dedicated field is included in the first system information, or based on information included in a configuration information element of the first system information when the dedicated field is missing from the first system information.

[0044] A non-transitory computer-readable medium storing code for wireless communication at a UE is described. The code may include instructions executable by a processor to: receive first system information from a base station, the first system information being for reduced capability UEs including UEs with bandwidth capabilities below a threshold, the UEs being reduced capability UEs; evaluate the first system information for a dedicated field, the dedicated field including an indicator that additional system information for the reduced capability UEs will be received in response to an on-demand request; and obtain the additional system information for the reduced capability UEs based on information included in the dedicated field when the dedicated field is included in the first system information, or obtain the additional system information for the reduced capability UEs based on information included in a configuration information element of the first system information when the dedicated field is missing from the first system information.

[0045] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for performing the following: determining, based on the information included in the dedicated field or the configuration information element, that the additional system information may be received in response to an on-demand request; and sending a request for the additional system information to the base station based on the information included in the dedicated field or the configuration information element.

[0046] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for performing: identifying a system information request mode based on the information included in the dedicated field or the configuration information element; and sending a request for the additional system information to the base station via a resource set associated with the PRACH or SRS based on the system information request mode.

[0047] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for performing: identifying a system information request mode based on the information included in the dedicated field or the configuration information element; and sending a request for the additional system information to the base station via a resource set associated with the PUSCH or PUCCH based on the system information request mode.

[0048] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for performing: identifying a system information request mode based on the information included in the dedicated field or the configuration information element; and sending a request for the additional system information to the base station via a resource set associated with PRACH, SRS, PUSCH, or PUCCH based on the system information request mode.

[0049] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for performing the following: identifying a system information request mode based on the information included in the dedicated field or the configuration information element; and obtaining the additional system information from the base station based on the system information request mode without sending a request for the additional system information.

[0050] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for performing: determining a threshold set for sending a request for the additional system information based on the information included in the dedicated field or the configuration information element; and sending the request for the additional system information to the base station based on determining that the UE satisfies at least one threshold in the threshold set.

[0051] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the dedicated field includes one or more bit fields, and determining the threshold set can be based on one or more values ​​of the one or more bit fields of the dedicated field.

[0052] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the set of thresholds for sending the request for the additional system information includes a first threshold associated with a bandwidth capability of the UE, a second threshold associated with a number of antennas of the UE, a third threshold associated with a signal quality of a signal received at the UE, a fourth threshold associated with a number of requests for the additional system information that the UE can send, or any combination thereof.

[0053] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the dedicated field includes one or more bit fields, a first value of a bit field in the one or more bit fields indicating that additional system information for the reduced capability UE may be received in response to an on-demand request, and a second value of the bit field in the one or more bit fields indicating that the additional system information for the reduced capability UE may not be received in response to an on-demand request.

[0054] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for performing the following: determining an additional system information broadcast set, which may be requested based on the information included in the dedicated field or the configuration information element; and sending an indication of the additional system information included in the additional system information set to the base station, wherein obtaining the additional system information may be based on sending the indication of the additional system information.

[0055] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for performing the following: determining a set of parameters that the base station can use to send the additional system information based on the information included in the dedicated field or the configuration information element; and sending an indication of one or more parameters included in the parameter set to the base station, wherein obtaining the additional system information can be based on sending the indication of the one or more parameters.

[0056] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the one or more parameters include MCS, code rate, or both.

[0057] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the one or more parameters used to obtain the additional system information may be different than at least one parameter used to receive the first system information.

[0058] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for performing the following: determining a period associated with the additional system information based on the information included in the dedicated field or the configuration information element, wherein obtaining the additional system information may be based on determining the period.

[0059] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the period associated with the additional system information may be different than a period associated with the first system information.

[0060] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the first system information includes a first type of SIB, MIB, SSB, or any combination thereof.

[0061] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the additional system information includes a second type of SIB that may be different from the first type.

[0062] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the first system information may be received multiplexed with other system information receivable by other UEs.

[0063] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the first system information may be received via a PBCH associated with a reduced capability UE, a PDSCH associated with a reduced capability UE, or both.

[0064] A method for wireless communication at a base station is described. The method may include: sending first system information to a UE, the first system information being for a reduced capability UE including a UE having a bandwidth capability below a threshold, the UE being a reduced capability UE; evaluating the first system information for a dedicated field, the dedicated field including an indicator that additional system information for the reduced capability UE will be sent in response to an on-demand request; and sending the additional system information for the reduced capability UE according to information included in the dedicated field when the dedicated field is included in the first system information, or sending the additional system information for the reduced capability UE according to information included in a configuration information element of the first system information when the dedicated field is absent in the first system information.

[0065] An apparatus for wireless communication at a base station is described. The apparatus may include: a processor, a memory in electronic communication with the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to perform the following operations: send first system information to a UE, the first system information being for a reduced capability UE including a UE with a bandwidth capability below a threshold, the UE being a reduced capability UE; evaluate the first system information for a dedicated field, the dedicated field including an indicator that additional system information for the reduced capability UE will be sent in response to an on-demand request; and send the additional system information for the reduced capability UE according to information included in the dedicated field when the dedicated field is included in the first system information, or send the additional system information for the reduced capability UE according to information included in a configuration information element of the first system information when the dedicated field is missing from the first system information.

[0066] Another apparatus for wireless communication at a base station is described. The apparatus may include: means for sending first system information to a UE, the first system information being for a reduced capability UE including a UE having a bandwidth capability below a threshold, the UE being a reduced capability UE; means for evaluating the first system information for a dedicated field, the dedicated field including an indicator that additional system information for the reduced capability UE will be sent in response to an on-demand request; and means for sending the additional system information for the reduced capability UE according to information included in the dedicated field when the dedicated field is included in the first system information, or according to information included in a configuration information element of the first system information when the dedicated field is missing from the first system information.

[0067] A non-transitory computer-readable medium storing code for wireless communication at a base station is described. The code may include instructions executable by a processor to: send first system information to a UE, the first system information being for a reduced capability UE including a UE having a bandwidth capability below a threshold, the UE being a reduced capability UE; evaluate the first system information for a dedicated field, the dedicated field including an indicator that additional system information for the reduced capability UE will be sent in response to an on-demand request; and send the additional system information for the reduced capability UE according to information included in the dedicated field when the dedicated field is included in the first system information, or send the additional system information for the reduced capability UE according to information included in a configuration information element of the first system information when the dedicated field is missing from the first system information.

[0068] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for performing the following: determining, based on the information included in the dedicated field or the configuration information element, that the additional system information may be sent in response to an on-demand request; and receiving a request for the additional system information from the UE based on the information included in the dedicated field or the configuration information element.

[0069] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for performing the following: identifying a system information request mode based on the information included in the dedicated field or the configuration information element; and receiving a request for the additional system information from the UE via a resource set associated with the PRACH or SRS based on the system information request mode.

[0070] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for performing: identifying a system information request mode based on the information included in the dedicated field or the configuration information element; and receiving a request for the additional system information from the UE via a resource set associated with the PUSCH or PUCCH based on the system information request mode.

[0071] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for performing the following: identifying a system information request mode based on the information included in the dedicated field or the configuration information element; and receiving a request for the additional system information from the UE via a resource set associated with a PRACH, SRS, PUSCH, or PUCCH based on the system information request mode.

[0072] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for performing the following: identifying a system information request mode based on the information included in the dedicated field or the configuration information element; and sending the additional system information from the base station according to the system information request mode without receiving a request for the additional system information.

[0073] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for performing: determining a threshold set for sending a request for the additional system information based on the information included in the dedicated field or the configuration information element; and receiving the request for the additional system information from the UE based on the UE satisfying at least one threshold in the threshold set.

[0074] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the dedicated field includes one or more bit fields, and determining the threshold set can be based on one or more values ​​of the one or more bit fields of the dedicated field.

[0075] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the set of thresholds for sending the request for the additional system information includes a first threshold associated with a bandwidth capability of the UE, a second threshold associated with a number of antennas of the UE, a third threshold associated with a signal quality of a signal received at the UE, a fourth threshold associated with a number of requests for the additional system information that the UE can send, or any combination thereof.

[0076] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the dedicated field includes one or more bit fields, a first value of a bit field in the one or more bit fields indicating that additional system information for the reduced capability UE may be received in response to an on-demand request, and a second value of the bit field in the one or more bit fields indicating that the additional system information for the reduced capability UE may not be received in response to an on-demand request.

[0077] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for performing the following: determining an additional system information set, which may be requested based on the information included in the dedicated field or the configuration information element; and receiving an indication of the additional system information included in the additional system information set from the UE, wherein sending the additional system information may be based on receiving the indication of the additional system information.

[0078] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for performing the following: determining a set of parameters that the base station can use to send the additional system information based on the information included in the dedicated field or the configuration information element; and receiving an indication of one or more parameters included in the parameter set from the UE, wherein sending the additional system information may be based on receiving the indication of the one or more parameters.

[0079] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the one or more parameters include MCS, code rate, or both.

[0080] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the one or more parameters used to send the additional system information may be different than at least one parameter used to send the first system information.

[0081] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for performing the following: determining a period associated with the additional system information based on the information included in the dedicated field or the configuration information element, wherein sending the additional system information may be based on determining the period.

[0082] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the period associated with the additional system information may be different than a period associated with the first system information.

[0083] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the first system information includes a first type of SIB, MIB, SSB, or any combination thereof.

[0084] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the additional system information includes a second type of SIB that may be different from the first type.

[0085] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the first system information may be sent multiplexed with other system information receivable by other UEs.

[0086] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the first system information may be sent via a PBCH associated with the reduced capability UE, a PDSCH associated with the reduced capability UE, or both. BRIEF DESCRIPTION OF THE DRAWINGS

[0087] Figure 1

[0013] An example of a wireless communication system supporting techniques for adaptively requesting on-demand system information (ODSI) in accordance with aspects of the present disclosure is shown.

[0088] Figure 2 An example of a wireless communication system supporting techniques for adaptively requesting ODSI in accordance with aspects of the present disclosure is shown.

[0089] Figure 3 An example of a process flow supporting techniques for adaptively requesting ODSI in accordance with aspects of the present disclosure is shown.

[0090] Figure 4 An example of resource configuration supporting techniques for adaptively requesting ODSI according to aspects of the present disclosure is shown.

[0091] Figure 5 and 6 A block diagram of a device supporting techniques for adaptively requesting ODSI in accordance with aspects of the present disclosure is shown.

[0092] Figure 7 A block diagram of a communications manager supporting techniques for adaptively requesting ODSI in accordance with aspects of the present disclosure is shown.

[0093] Figure 8 A diagram of a system including devices supporting techniques for adaptively requesting ODSI in accordance with aspects of the present disclosure is shown.

[0094] Fig. 9 and 10 A block diagram of a device supporting techniques for adaptively requesting ODSI in accordance with aspects of the present disclosure is shown.

[0095] Fig.11 A block diagram of a communications manager supporting techniques for adaptively requesting ODSI in accordance with aspects of the present disclosure is shown.

[0096] Fig.12 A diagram of a system including devices supporting techniques for adaptively requesting ODSI in accordance with aspects of the present disclosure is shown.

[0097] Figures 13 to 16 A flow chart illustrating a method of supporting techniques for adaptively requesting ODSI in accordance with aspects of the present disclosure is shown. DETAILED DESCRIPTION

[0098] In some wireless communication systems, a base station may be configured to support conventional, full-capability user equipment (UE) (e.g., full bandwidth UE) and UE with reduced capabilities. UE with reduced capabilities may include UEs with bandwidth capabilities below a given threshold, and therefore may include UEs that communicate on reduced bandwidths (RBs) compared to full-capability UEs. Due to reduced bandwidth capabilities, UEs with reduced capabilities may not be able to receive system information (e.g., master information block (MIB), system information block (SIB)) broadcasted by the network using a bandwidth (e.g., bandwidth part (BWP)) that can be received by conventional, full-capability UEs. In order to enable UEs with reduced capabilities to receive system information, the base station may selectively adjust the bandwidth or other parameters used to send system information so that both full-capability UEs and UEs with reduced capabilities can receive the same system information. However, broadcasting system information on a smaller bandwidth may result in inefficient use of resources and increase power consumption at the base station. Additionally or alternatively, the base station may send conventional system information for full-capability UEs and bandwidth-reduced system information for UEs with reduced capabilities. However, sending separate system information may result in increased network overhead and resource congestion. Furthermore, in situations where there are few or no reduced capability UEs requiring reduced bandwidth system information, resources allocated for reduced bandwidth system information may be wasted.

[0099] Thus, techniques for on-demand broadcast of system information for reduced capability UEs are described. In general, the described techniques enable a network to continuously broadcast first system information for reduced capability UEs, wherein the first system information includes an indication of whether additional system information for the reduced capability UEs is available to be received in response to an on-demand request.

[0100] For example, a reduced-capability UE may receive first system information for a reduced-capability UE (e.g., a reduced-bandwidth UE). The first system information may include a reduced-bandwidth system information block (RB-SIB1) or a reduced-bandwidth master information block (RB-MIB) (each of which may be received via a reduced-bandwidth synchronization signal block (RB-SSB)) or any combination thereof. Upon receiving the first system information, the UE may determine whether the first system information includes a dedicated field indicating whether additional system information (e.g., RB-SIB2, RB-SIB3) for the reduced-capability UE is receivable in response to an on-demand request. If a dedicated field is included in the first system information, the UE may determine whether the additional system information is receivable in response to an on-demand request based on the dedicated field. Alternatively, if a dedicated field is not included in the first system information, the UE may determine whether the additional system information is receivable in response to an on-demand request based on a configuration information element of the first system information. In this regard, the dedicated field may be used as an efficient early indicator of whether the network is configured for on-demand system information (ODSI).

[0101] In some aspects, a request for additional system information may be sent via a physical random access channel (PRACH), a sounding reference signal (SRS), a physical uplink shared channel (PUSCH), a physical downlink control channel (PUCCH), or any combination thereof. Resources associated with sending a request for additional system information may be indicated in the first system information. In the case where the first system information includes a dedicated field, the dedicated field may include one or more bit fields. For example, in the case where the dedicated field includes a single bit field, a first value (e.g., other system information (OSI)-indicator-RB=1) may indicate that the network supports ODSI, wherein a second value (e.g., OSI-indicator-RB=0) may indicate that the network does not support ODSI. As another example, in the case where the dedicated field includes multiple bit fields, the value of the bit field may reference one or more lookup tables, which may be referenced to determine parameters for receiving additional system information (e.g., coverage level, modulation and coding scheme (MCS), code rate, periodicity), thresholds or other criteria for requesting additional system information (e.g., UE bandwidth capability threshold, reference signal received power (RSRP) threshold, etc.).

[0102] By enabling a UE to obtain additional system information in response to an on-demand request, the techniques described herein may reduce signaling overhead and result in a more efficient use of resources. Specifically, the techniques described herein may enable a network to broadcast additional system information only upon request, thereby reducing signaling overhead and preventing waste of resources in the presence of few (or no) UEs with reduced capabilities to receive additional system information.

[0103] Aspects of the disclosure are first described in the context of a wireless communication system. Additional aspects of the disclosure are described in the context of an example process flow. Aspects of the disclosure are further illustrated by apparatus diagrams, system diagrams, and flow diagrams relating to techniques for adaptively requesting ODSI, and are described with reference to these diagrams.

[0104] Figure 1 An example of a wireless communication system 100 supporting techniques for adaptively requesting ODSI according to aspects of the present disclosure is shown. The wireless communication system 100 may include one or more base stations 105, one or more UEs 115, and a core network 130. In some examples, the wireless communication system 100 may be a long term evolution (LTE) network, an improved LTE (LTE-A) network, an LTE-A Pro network, or a new radio (NR) network. In some examples, the wireless communication system 100 may support enhanced broadband communications, ultra-reliable (e.g., mission-critical) communications, low-latency communications, or communications with low-cost and low-complexity devices, or any combination thereof.

[0105] Base stations 105 may be dispersed throughout a geographic area to form wireless communication system 100, and may be devices of different forms or capabilities. Base stations 105 and UEs 115 may communicate wirelessly via one or more communication links 125. Each base station 105 may provide a coverage area 110 over which UEs 115 and base stations 105 may establish one or more communication links 125. Coverage area 110 may be an example of a geographic area over which base stations 105 and UEs 115 may support transmission of signals in accordance with one or more radio access technologies.

[0106] UEs 115 may be dispersed throughout the coverage area 110 of the wireless communication system 100, and each UE 115 may be stationary, mobile, or both at different times. UEs 115 may be devices of different forms or with different capabilities. Figure 1Some example UEs 115 are shown in FIG. 1. The UEs 115 described herein may be able to communicate with various types of devices, such as other UEs 115, base stations 105, or network devices (e.g., core network nodes, relay devices, integrated access and backhaul (IAB) nodes, or other network devices), such as Figure 1 shown.

[0107] The base stations 105 may communicate with the core network 130, or communicate with each other, or perform both operations. For example, the base stations 105 may interface with the core network 130 via one or more backhaul links 120 (e.g., via S1, N2, N3 or other interfaces). The base stations 105 may communicate with each other directly (e.g., directly between the base stations 105) on the backhaul links 120 (e.g., via X2, Xn or other interfaces), or communicate with each other indirectly (e.g., via the core network 130), or perform both operations. In some examples, the backhaul links 120 may be or include one or more wireless links.

[0108] One or more of the base stations 105 described herein may include or may be referred to by those skilled in the art as a base station transceiver, a wireless base station, an access point, a wireless transceiver, a Node B, an evolved Node B (eNB), a next generation Node B, or a Gigabit Node B (any of which may be referred to as a gNB), a Home Node B, a Home Evolved Node B, or some other appropriate terminology.

[0109] UE 115 may include or may be referred to as a mobile device, a wireless device, a remote device, a handheld device, or a subscriber device, or some other appropriate terminology, where a "device" may also be referred to as a unit, a station, a terminal, or a client, etc. UE 115 may also include or may be referred to as a personal electronic device, such as a cellular phone, a personal digital assistant (PDA), a tablet computer, a laptop computer, or a personal computer. In some examples, UE 115 may include or be referred to as a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or a machine type communication (MTC) device, etc., which may be implemented in various items such as appliances, or vehicles, meters, etc.

[0110] The UE 115 described herein may be able to communicate with various types of devices, such as other UEs 115, which may sometimes act as relays, as well as base stations 105 and network devices, including macro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations, etc. Figure 1 shown.

[0111] The UE 115 and the base station 105 may communicate wirelessly with each other via one or more communication links 125 on one or more carriers. The term "carrier" may refer to a set of radio frequency spectrum resources having a defined physical layer structure for supporting the communication link 125. For example, a carrier for the communication link 125 may include a portion of a radio frequency spectrum band (e.g., a BWP, which operates according to one or more physical layer channels for a given radio access technology (e.g., LTE, LTE-A, LTE-A Pro, NR). Each physical layer channel may carry acquisition signaling (e.g., synchronization signals, system information), control signaling for coordinating operations for the carrier, user data, or other signaling. The wireless communication system 100 may support communication with the UE 115 using carrier aggregation or multi-carrier operation. Depending on the carrier aggregation configuration, the UE 115 may be configured with multiple downlink component carriers and one or more uplink component carriers. Carrier aggregation may be used with both frequency division duplex (FDD) component carriers and time division duplex (TDD) component carriers.

[0112] In some examples (e.g., in a carrier aggregation configuration), a carrier may also have acquisition signaling or control signaling for coordinating operations with respect to other carriers. A carrier may be associated with a frequency channel (e.g., an Evolved Universal Mobile Telecommunications System Terrestrial Radio Access (E-UTRA) Absolute Radio Frequency Channel Number (EARFCN)) and may be placed according to a channel grid for discovery by a UE 115. A carrier may operate in a standalone mode, where a UE 115 performs initial acquisition and connection via a carrier, or a carrier may operate in a non-standalone mode, where a different carrier (e.g., of the same or different radio access technology) is used to anchor a connection.

[0113] The communication link 125 shown in the wireless communication system 100 may include an uplink transmission from the UE 115 to the base station 105, or a downlink transmission from the base station 105 to the UE 115. A carrier may carry downlink or uplink communications (e.g., in FDD mode) or may be configured to carry both downlink and uplink communications (e.g., in TDD mode).

[0114] A carrier may be associated with a particular bandwidth of a radio frequency spectrum, and in some examples, the carrier bandwidth may be referred to as a "system bandwidth" of the carrier or wireless communication system 100. For example, the carrier bandwidth may be one of a plurality of determined bandwidths of a carrier for a particular radio access technology (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 megahertz (MHz)). A device of the wireless communication system 100 (e.g., a base station 105, a UE 115, or both) may have a hardware configuration that supports communication on a particular carrier bandwidth, or may be configurable to support communication on one of a set of carrier bandwidths. In some examples, the wireless communication system 100 may include a base station 105 or a UE 115 that supports simultaneous communication via carriers associated with a plurality of carrier bandwidths. In some examples, each served UE 115 may be configured to operate on a portion (e.g., a subband, a BWP) or all of a carrier bandwidth.

[0115] The signal waveform transmitted on the carrier may be composed of multiple subcarriers (e.g., using multicarrier modulation (MCM) techniques such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform spread OFDM (DFT-S-OFDM)). In a system employing MCM techniques, a resource element may include a symbol period (e.g., the duration of a modulation symbol) and a subcarrier, where the symbol period and the subcarrier spacing are inversely related. The number of bits carried by each resource element may depend on the modulation scheme (e.g., the order of the modulation scheme, the coding rate of the modulation scheme, or both). Therefore, the more resource elements received by the UE 115 and the higher the order of the modulation scheme, the higher the data rate for the UE 115 can be. Wireless communication resources may refer to a combination of radio frequency spectrum resources, time resources, and spatial resources (e.g., spatial layers or beams), and the use of multiple spatial layers may further increase the data rate or data integrity for communication with the UE 115.

[0116] One or more numerologies for a carrier may be supported, where the numerologies may include subcarrier spacing (Δf) and cyclic prefixes. A carrier may be divided into one or more BWPs with the same or different numerologies. In some examples, a UE 115 may be configured with multiple BWPs. In some examples, a single BWP for a carrier may be active at a given time, and communications for a UE 115 may be limited to the one or more active BWPs.

[0117] The basic time unit (which may be referred to as T s =1 / (Δf max ·N f ) seconds sampling period, where Δf maxIt can represent the maximum supported subcarrier spacing, and N f The time intervals for the base station 105 or the UE 115 may be expressed as multiples of a maximum supported discrete Fourier transform (DFT) size). The time intervals of the communication resources may be organized according to radio frames each having a specified duration (e.g., 10 milliseconds (ms)). Each radio frame may be identified by a system frame number (SFN) (e.g., ranging from 0 to 1023).

[0118] Each frame may include a plurality of consecutively numbered subframes or time slots, and each subframe or time slot may have the same duration. In some examples, a frame may be divided (e.g., in the time domain) into subframes, and each subframe may be further divided into a number of time slots. Alternatively, each frame may include a variable number of time slots, and the number of time slots may depend on the subcarrier spacing. Each time slot may include a number of symbol periods (e.g., depending on the length of a cyclic prefix added in front of each symbol period). In some wireless communication systems 100, a time slot may be further divided into a plurality of micro-time slots containing one or more symbols. Excluding the cyclic prefix, each symbol period may contain one or more (e.g., N f The duration of a symbol period may depend on the subcarrier spacing or the operating frequency band.

[0119] A subframe, a time slot, a mini-time slot, or a symbol may be the smallest scheduling unit (e.g., in the time domain) of the wireless communication system 100 and may be referred to as a transmission time interval (TTI). In some examples, the TTI duration (e.g., the number of symbol periods in a TTI) may be variable. Additionally or alternatively, the smallest scheduling unit of the wireless communication system 100 may be dynamically selected (e.g., in the form of bursts of shortened TTIs (sTTIs)).

[0120] Physical channels may be multiplexed on a carrier according to various techniques. For example, one or more of a time division multiplexing (TDM) technique, a frequency division multiplexing (FDM) technique, or a hybrid TDM-FDM technique may be used to multiplex physical control channels and physical data channels on a downlink carrier. A control region (e.g., a control resource set (CORESET)) for a physical control channel may be defined by the number of symbol periods and may extend across the system bandwidth of a carrier or a subset of the system bandwidth. One or more control regions (e.g., CORESETs) may be configured for a group of UEs 115. For example, one or more of the UEs 115 may monitor or search the control region for control information according to one or more search space sets, and each search space set may include one or more control channel candidates at one or more aggregation levels arranged in a cascaded manner. The aggregation level for a control channel candidate may refer to the number of control channel resources (e.g., control channel elements (CCEs)) associated with the coded information for a control information format having a given payload size. The search space sets may include a common search space set configured for transmitting control information to multiple UEs 115 and a UE-specific search space set for transmitting control information to a specific UE 115 .

[0121] Each base station 105 can provide communication coverage via one or more cells (e.g., macro cells, small cells, hot spots or other types of cells, or any combination thereof). The term "cell" can refer to a logical communication entity used to communicate with the base station 105 (e.g., on a carrier), and can be associated with an identifier (e.g., a physical cell identifier (PCID), a virtual cell identifier (VCID) or other identifier) ​​for distinguishing adjacent cells. In some examples, a cell can also refer to a geographic coverage area 110 or a portion of a geographic coverage area 110 (e.g., a sector) on which a logical communication entity operates. Depending on various factors (such as the capabilities of the base station 105), the scope of such a cell can range from a smaller area (e.g., a structure, a subset of a structure) to a larger area. For example, a cell can be or include a building, a subset of a building, or an external space between or overlapping geographic coverage areas 110, etc.

[0122] In some examples, the base stations 105 may be mobile and, therefore, provide communication coverage for mobile geographic coverage areas 110. In some examples, different geographic coverage areas 110 associated with different technologies may overlap, but the different geographic coverage areas 110 may be supported by the same base station 105. In other examples, overlapping geographic coverage areas 110 associated with different technologies may be supported by different base stations 105. The wireless communication system 100 may include, for example, a heterogeneous network in which different types of base stations 105 provide coverage for respective geographic coverage areas 110 using the same or different radio access technologies.

[0123] The wireless communication system 100 can be configured to support ultra-reliable communication or low-latency communication, or various combinations thereof. For example, the wireless communication system 100 can be configured to support ultra-reliable low-latency communication (URLLC) or mission-critical communication. UE115 can be designed to support ultra-reliable, low-latency or critical functions (e.g., mission-critical functions). Ultra-reliable communication can include private communication or group communication, and can be supported by one or more mission-critical services (such as mission-critical push-to-talk (MCPTT), mission-critical video (MCVideo), or mission-critical data (MCData). Support for mission-critical functions can include prioritization of services, and mission-critical services can be used for public safety or general commercial applications. The terms ultra-reliable, low-latency, mission-critical, and ultra-reliable low-latency can be used interchangeably in this article.

[0124] In some examples, UE 115 may be able to communicate directly with other UE 115 on a device-to-device (D2D) communication link 135 (e.g., using a peer-to-peer (P2P) or D2D protocol). One or more UEs 115 utilizing D2D communication may be within a geographic coverage area 110 of a base station 105. Other UEs 115 in such a group may be outside the geographic coverage area 110 of the base station 105 or otherwise unable to receive transmissions from the base station 105. In some examples, groups of UEs 115 communicating via D2D communication may utilize a one-to-many (1:M) system, wherein each UE 115 transmits to each other UE 115 in the group. In some examples, the base station 105 facilitates the scheduling of resources for D2D communication. In other cases, D2D communication is performed between UEs 115 without involving the base station 105.

[0125] The core network 130 may provide user authentication, access authorization, tracking, Internet Protocol (IP) connection, and other access, routing or mobility functions. The core network 130 may be an evolved packet core (EPC) or a 5G core (5GC), which may include at least one control plane entity (e.g., a mobility management entity (MME), an access and mobility management function (AMF)) for managing access and mobility and at least one user plane entity (e.g., a serving gateway (S-GW), a packet data network (PDN) gateway (P-GW), or a user plane function (UPF)) for routing packets to an external network or interconnecting to an external network. The control plane entity may manage non-access stratum (NAS) functions, such as mobility, authentication, and bearer management for UE 115 served by a base station 105 associated with the core network 130. User IP packets may be transmitted through a user plane entity, which may provide IP address allocation and other functions. The user plane entity may be coupled to an IP service 150 for one or more network operators. IP services 150 may include access to the Internet, an intranet, an IP Multimedia Subsystem (IMS), or packet-switched streaming services.

[0126] Some of the network devices (e.g., base stations 105) may include subcomponents such as access network entities 140, which may be examples of access node controllers (ANCs). Each access network entity 140 may communicate with the UE 115 through one or more other access network transport entities 145 (which may be referred to as radio heads, smart radio heads, or transmit / receive points (TRPs)). Each access network transport entity 145 may include one or more antenna panels. In some configurations, the various functions of each access network entity 140 or base station 105 may be distributed across various network devices (e.g., radio heads and ANCs) or merged into a single network device (e.g., base station 105).

[0127] The wireless communication system 100 may operate using one or more frequency bands, typically in the range of 300 megahertz (MHz) to 300 gigahertz (GHz). Typically, the region from 300 MHz to 3 GHz is referred to as the ultra-high frequency (UHF) region or decimeter band because the wavelengths range from approximately one decimeter to one meter in length. UHF waves may be blocked or redirected by buildings and environmental features, but the waves may be sufficient to penetrate structures for macro cells to provide service to UEs 115 located indoors. Transmissions using UHF waves may be associated with smaller antennas and shorter distances (e.g., less than 100 kilometers) compared to transmissions using smaller frequencies and longer waves in the high frequency (HF) or very high frequency (VHF) portions of the spectrum below 300 MHz.

[0128] The wireless communication system 100 can utilize both licensed and unlicensed radio frequency spectrum bands. For example, the wireless communication system 100 can employ license assisted access (LAA), LTE unlicensed (LTE-U) wireless access technology, or NR technology in an unlicensed band (such as the 5 GHz industrial, scientific, and medical (ISM) band). When operating in an unlicensed radio frequency spectrum band, devices (such as base stations 105 and UEs 115) can employ carrier sensing for conflict detection and avoidance. In some examples, operations in unlicensed bands can be based on a carrier aggregation configuration in combination with component carriers operating in a licensed band (e.g., LAA). Operations in the unlicensed spectrum can include downlink transmissions, uplink transmissions, P2P transmissions, or D2D transmissions, etc.

[0129] The base station 105 or UE 115 may be equipped with multiple antennas, which may be used to employ technologies such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communications, or beamforming. The antennas of the base station 105 or UE 115 may be located within one or more antenna arrays or antenna panels (which may support MIMO operations or transmit or receive beamforming). For example, one or more base station antennas or antenna arrays may be co-located at an antenna assembly, such as an antenna tower. In some examples, the antennas or antenna arrays associated with the base station 105 may be located at different geographical locations. The base station 105 may have an antenna array having a number of rows and columns of antenna ports that the base station 105 may use to support beamforming for communications with the UE 115. Similarly, the UE 115 may have one or more antenna arrays that may support various MIMO or beamforming operations. Additionally or alternatively, the antenna panel may support radio frequency beamforming for signals sent via the antenna ports.

[0130] The base station 105 or UE 115 can use MIMO communication to exploit multipath signal propagation and improve spectral efficiency by sending or receiving multiple signals via different spatial layers. Such a technology may be referred to as spatial multiplexing. For example, a transmitting device may send multiple signals via different antennas or different combinations of antennas. Similarly, a receiving device may receive multiple signals via different antennas or different combinations of antennas. Each of the multiple signals may be referred to as a separate spatial stream and may carry bits associated with the same data stream (e.g., the same codeword) or different data streams (e.g., different codewords). Different spatial layers may be associated with different antenna ports for channel measurement and reporting. MIMO technology includes single-user MIMO (SU-MIMO) (where multiple spatial layers are sent to the same receiving device) and multi-user MIMO (MU-MIMO) (where multiple spatial layers are sent to multiple devices).

[0131] Beamforming (which may also be referred to as spatial filtering, directional transmission, or directional reception) is a signal processing technique that can be used at a transmitting device or a receiving device (e.g., a base station 105, a UE 115) to form or direct an antenna beam (e.g., a transmit beam, a receive beam) along a spatial path between the transmitting device and the receiving device. Beamforming can be achieved by combining signals transmitted via antenna elements of an antenna array so that some signals propagating in a specific orientation relative to the antenna array experience constructive interference, while other signals experience destructive interference. Adjustments to signals transmitted via antenna elements may include the transmitting device or the receiving device applying an amplitude offset, a phase offset, or both to signals carried via antenna elements associated with the device. Adjustments associated with each of the antenna elements may be defined by a set of beamforming weights associated with a specific orientation (e.g., relative to the antenna array of the transmitting device or the receiving device, or relative to some other orientation).

[0132] As part of the beamforming operation, the base station 105 or the UE 115 may use beam scanning techniques. For example, the base station 105 may use multiple antennas or antenna arrays (e.g., antenna panels) to perform beamforming operations for directional communications with the UE 115. The base station 105 may send some signals (e.g., synchronization signals, reference signals, beam selection signals, or other control signals) multiple times in different directions. For example, the base station 105 may send signals based on different sets of beamforming weights associated with different transmission directions. Transmissions in different beam directions may be used (e.g., by a transmitting device (such as the base station 105) or by a receiving device (such as the UE 115)) to identify a beam direction for subsequent transmission or reception by the base station 105.

[0133] Base station 105 may transmit some signals (e.g., data signals associated with a particular receiving device (e.g., UE 115)) in a single beam direction (e.g., a direction associated with the receiving device). In some examples, the beam direction associated with transmission along the single beam direction may be determined based on signals transmitted in one or more beam directions. For example, UE 115 may receive one or more of the signals transmitted by base station 105 in different directions and may report to base station 105 an indication of the signal received by UE 115 having the highest signal quality or otherwise acceptable signal quality.

[0134] In some examples, transmissions by a device (e.g., by a base station 105 or a UE 115) may be performed using multiple beam directions, and the device may generate a combined beam for transmission (e.g., from the base station 105 to the UE 115) using a combination of digital precoding or radio frequency beamforming. The UE 115 may report feedback indicating precoding weights for one or more beam directions, and the feedback may correspond to a configured number of beams across the system bandwidth or one or more subbands. The base station 105 may send reference signals (e.g., cell-specific reference signals (CRS), channel state information reference signals (CSI-RS)) that may or may not be precoded. The UE 115 may provide feedback for beam selection, which may be a precoding matrix indicator (PMI) or codebook-based feedback (e.g., a multi-panel type of codebook, a linear combination type of codebook, a port selection type of codebook). Although these techniques are described with reference to signals sent by base station 105 in one or more directions, UE 115 may employ similar techniques to send signals multiple times in different directions (e.g., to identify a beam direction for subsequent transmission or reception by UE 115) or to send signals in a single direction (e.g., to send data to a receiving device).

[0135] When receiving various signals (such as synchronization signals, reference signals, beam selection signals, or other control signals) from the base station 105, the receiving device (e.g., UE 115) can try multiple reception configurations (e.g., directional listening). For example, the receiving device can try multiple reception directions by receiving via different antenna subarrays, by processing the received signals according to different antenna subarrays, by receiving according to different reception beamforming weight sets applied to the signals received at multiple antenna elements of the antenna array (e.g., different directional listening weight sets), or by processing the received signals according to different reception beamforming weight sets applied to the signals received at multiple antenna elements of the antenna array (any of the above operations may be referred to as "listening" according to different reception configurations or reception directions). In some examples, the receiving device can use a single reception configuration to receive along a single beam direction (e.g., when receiving a data signal). A single receive configuration may be aligned on a beam direction determined based on listening according to different receive configuration directions (e.g., a beam direction determined to have the highest signal strength, the highest signal-to-noise ratio (SNR), or otherwise acceptable signal quality based on listening according to multiple beam directions).

[0136] The wireless communication system 100 may be a packet-based network operated according to a layered protocol stack. In the user plane, the communication at the bearer or packet data convergence protocol (PDCP) layer may be IP-based. The radio link control (RLC) layer may perform packet segmentation and reassembly to transmit on a logical channel. The medium access control (MAC) layer may perform priority handling and multiplexing of logical channels to transport channels. The MAC layer may also support retransmission at the MAC layer using error detection techniques, error correction techniques, or both to improve link efficiency. In the control plane, the radio resource control (RRC) protocol layer may provide the establishment, configuration, and maintenance of an RRC connection (which supports radio bearers for user plane data) between a UE 115 and a base station 105 or a core network 130. At the physical layer, transport channels may be mapped to physical channels.

[0137] UE 115 and base station 105 can support retransmission of data to increase the possibility that the data is successfully received. Hybrid automatic repeat request (HARQ) feedback is a technology for increasing the possibility that data is correctly received on communication link 125. HARQ can include a combination of error detection (e.g., using cyclic redundancy check (CRC)), forward error correction (FEC) and retransmission (e.g., automatic repeat request (ARQ)). HARQ can improve the throughput at the MAC layer under poor radio conditions (e.g., low signal and noise conditions). In some examples, the device can support the same time slot HARQ feedback, wherein the device can provide HARQ feedback for data received in the previous symbol in the time slot in a specific time slot. In other cases, the device can provide HARQ feedback in subsequent time slots or according to some other time interval.

[0138] In some aspects, the UE 115 and the base station 105 of the wireless communication system 100 may support techniques for on-demand broadcasting of additional system information for the reduced capability UE 115. Specifically, the reduced capability UE 115 of the wireless communication system 100 may receive first system information for the reduced capability UE from the base station 105, and may be able to determine whether the additional system information is available to be received in response to the on-demand request based on an indication in the first system information.

[0139] For example, the base station 105 of the wireless communication system 100 may be configured to broadcast the first system information for the UE 115 with reduced capability periodically (e.g., continuously). The first system information for the UE 115 with reduced capability may include RB-SIB1 or RB-MIB received via RB-SSB. In this example, the UE 115 with reduced capability may receive the first system information for the UE 115 with reduced capability, and may determine whether the first system information includes a dedicated field indicating whether additional system information (e.g., RB-SIB2, RB-SIB3) for the UE 115 with reduced capability can be received in response to an on-demand request. If a dedicated field is included in the first system information, the UE 115 may determine whether the additional system information can be received in response to an on-demand request based on the dedicated field. Alternatively, if a dedicated field is not included in the first system information, the UE 115 may determine whether the additional system information can be received in response to an on-demand request based on the configuration information element of the first system information. In this regard, the dedicated field may serve as an efficient early indicator as to whether the network is configured for ODSI.

[0140] In the case where the first system information indicates that the additional system information may not be received in response to an on-demand request, the reduced-capability UE 115 may continue wireless communication without acquiring the additional system information, or it may search for a new cell. Conversely, in the case where the first system information indicates that the additional system information may be received in response to an on-demand request, the UE 115 may send a request for the additional system information, and may obtain the additional system information in response to the request.

[0141] In some aspects, a request for additional system information may be sent via PRACH, SRS, PUSCH, PUCCH, or any combination thereof. Resources associated with sending a request for additional system information may be indicated in the first system information. In the case where the first system information includes a dedicated field, the dedicated field may include one or more bit fields. For example, in the case where the dedicated field includes a single bit field, a first value (e.g., OSI-indicator-RB=1) may indicate that the network supports ODSI, wherein a second value (e.g., OSI-indicator-RB=0) may indicate that the network does not support ODSI. As another example, in the case where the dedicated field includes multiple bit fields, the value of the bit field may reference one or more lookup tables, which may be referenced to determine parameters for receiving additional system information (e.g., coverage level, MCS, code rate, periodicity), thresholds for requesting additional system information, or other criteria (e.g., UE bandwidth capability threshold, RSRP threshold, etc.).

[0142] Techniques described herein may provide for on-demand broadcasting of system information, which may reduce signaling overhead and result in more efficient use of resources within the wireless communication system 100. Specifically, techniques described herein may enable a base station 105 of a wireless communication system to broadcast additional system information upon request, thereby reducing signaling overhead and preventing wasted resources in situations where there are few (or no) reduced capability UEs 115 that want to receive the additional system information.

[0143] Figure 2 An example of a wireless communication system 200 that supports techniques for adaptively requesting ODSI in accordance with aspects of the present disclosure is shown. In some examples, the wireless communication system 200 can implement aspects of the wireless communication system 100. The wireless communication system 200 can include a first UE 115-a (e.g., a reduced-capability UE 115-a), a second UE 115-b (e.g., a full-capability UE 115-b), and a base station 105-a, which can be as described with reference to Figure 1 Examples of UE 115 and base station 105 are described.

[0144] In some aspects, UEs 115-a and 115-b may communicate with base station 105-a using one or more beams, one or more carriers, one or more communication links, or any combination thereof. For example, a first UE 115-a may communicate with base station 105-a via communication link 205-a, and a second UE 115-b may communicate with base station 105-b via communication link 205-b. In some aspects, communication links 205-a and 205-b may include examples of access links (e.g., Uu links). Communication links 205-a and 205-b may include bidirectional links that may include both uplink and downlink communications. For example, a first UE 115-a may send an uplink transmission (such as an uplink control signal or an uplink data signal) to base station 105-a using communication link 205-a, and base station 105-a may send a downlink transmission (such as a downlink control signal or a downlink data signal) to the first UE 115-a using wireless link 205-a. In some aspects, the wireless communication system 200 may support wireless communications with wireless devices (e.g., a first UE 115-a, a second UE 115-b) via one or more serving cells of the wireless communication system 200. Each serving cell may be supported by one or more base stations 105 of the wireless communication system 200.

[0145] like Figure 2As shown, the base station 105-a of the wireless communication system 200 can be configured to support both conventional, full-capability user equipment UE 115 and reduced-capability UE 115. For example, the second UE 115-b may include an example of a full-capability (e.g., full bandwidth) UE 115-b, while the first UE 115-a may include an example of a reduced-capability (e.g., reduced bandwidth) UE 115-a. The reduced-capability UE 115-a may exhibit reduced capabilities with respect to one or more parameters, including the bandwidth over which it can communicate, processing power, number of antennas, or any combination thereof, compared to the full-capability UE 115-b. For example, in some cases, the first UE 115-a may include bandwidth capabilities below a given threshold, and may communicate with the base station 105-a at a reduced bandwidth compared to the full-capability UE 115-b.

[0146] In some wireless communication systems, due to the reduced capability of the first UE 115-a (e.g., reduced bandwidth capability), the first UE 115-a may not be able to receive system information (e.g., MIB, SIB, SSB) that is broadcast by the base station 105-a using a bandwidth (e.g., BWP) that is receivable by a conventional, full-capability UE 115-b. UEs 115-a and 115-b may obtain additional system information to perform some communication services or programs, such as gaming applications, video messaging services, etc. In some wireless communication systems, in order to enable the reduced-capability UE 115-a to receive the additional system information, the base station 105-a may selectively adjust the bandwidth or other parameters used to send the additional system information so that both the full-capability UE 115-b and the reduced-capability UE 115-a may be able to receive the same system information. However, broadcasting the system information over a smaller bandwidth may result in inefficient use of resources and increase power consumption at the base station 105-a. Additionally or alternatively, the base station 105-a may transmit regular system information for the full-capability UE 115-b and reduced-bandwidth system information for the reduced-capability UE 115-a. However, transmitting separate system information may result in increased network overhead and resource congestion. Furthermore, in the presence of few or no reduced-capability UEs 115 (e.g., the first UE 115-a) that require reduced-bandwidth system information, resources allocated for the reduced-bandwidth system information may be wasted.

[0147] Thus, the wireless communication system 200 can be configured to enable the base station 105-a to broadcast additional system information for a reduced capability UE 115 (e.g., reduced capability UE 115-a) in response to an on-demand request. In general, the described techniques enable the network to continuously broadcast first system information for the reduced capability UE 115-a (e.g., RB-SIB1 or RB-MIB received via RB-SSB), wherein the first system information includes an indication of whether the additional system information for the reduced capability UE 115-a is available for reception in response to an on-demand request.

[0148] For example, a UE 115-a (e.g., a reduced capability UE 115-a) may receive first system information 210 from a base station 105-a. In some aspects, the first system information 210 may be configured for (e.g., receivable by) a reduced capability UE 115 that includes a bandwidth capability below a threshold. For example, the first system information 210 may include a first type of SIB (e.g., RB-SIB1) or a MIB (e.g., RB-MIB), or a combination thereof.

[0149] In some aspects, the first system information 210 may be received via a dedicated physical broadcast channel (PBCH) associated with the reduced capability UE 115, a dedicated physical downlink shared channel (PDSCH) associated with the reduced capability UE 115, or both. In other words, the first system information may be broadcast / transmitted within resources associated with the reduced capability UE 115 (e.g., dedicated to the reduced capability UE 115). For example, the wireless communication system 200 may be configured (e.g., via RRC signaling, SIB messaging) with downlink and / or uplink BWPs dedicated to the reduced capability UE 115, the regular UE 115, or both. In some cases, the wireless communication system 200 may include different sets of downlink and uplink BWPs, which are dedicated to the reduced capability UE 115 and the regular UE 115, respectively. For example, an initial downlink BWP dedicated to the reduced-capability UE 115 may be defined or configured (e.g., via RRC), where the dedicated downlink BWP is different from the initial downlink BWP for the regular, non-reduced-bandwidth UE 115. A set of resources associated with or dedicated to the reduced-capability UE 115 (e.g., the dedicated BWP) may be configured to not exceed an expected maximum bandwidth capability supported by the reduced-capability user equipment 115. Additionally, in some cases, the wireless communication system 200 may be configured with a random access channel (RACH) opportunity (RO) for sending the first system information. The RO set may be dedicated to the reduced-capability UE 115 or shared with the regular UE 115.

[0150] In other cases, the first system information 210 may be received via a channel that is not associated with the reduced capability UE 115 (e.g., not dedicated to the reduced capability UE 115). In some aspects, the first system information 210 received by the UE 115-a may be multiplexed with other system information receivable by other UEs 115 (e.g., full capability UE 115-b). For example, in some cases, the base station 105-a may multiplex the system information receivable by the reduced capability UE 115 (e.g., UE 115-a) with other system information receivable by the full capability UE 115 (e.g., UE 115-b) to generate the first system information 210. In some aspects, the UE 115-a may evaluate the first system information 210 for a dedicated field that includes an indicator that additional system information for the reduced capability UE 115 (e.g., UE 115-a) may be received in response to an on-demand request. In this regard, the UE 115-a may determine whether the first system information 210 includes a dedicated field indicating whether the network supports ODSI for reduced-capability UEs 115. In some aspects, the dedicated field within the first system information 210 may include one or more bit fields.

[0151] In some aspects, the UE 115-a may determine a system information request mode for requesting the additional system information 220. The system information request mode may indicate whether the base station 105-a supports broadcasts of the additional system information 220 for the reduced capability UEs 115. Additionally or alternatively, the system information request mode may indicate a channel and / or resource for requesting the additional system information 220. In this regard, the UE 115-a may determine the system information request mode to determine whether the additional system information 220 for the reduced capability UEs 115 may be received without an on-demand request, whether the additional system information 220 for the reduced capability UEs 115 may be received in response to an on-demand request, a channel (e.g., a resource) that may be used to request the additional system information 220, or any combination thereof.

[0152] UE 115-a may determine the system information request mode based on information included in a dedicated field of the first system information 210, information included in a configuration information element of the first system information 210, or both. In this regard, UE 115-a may determine the system information request mode based on receiving the first system information 210, evaluating whether the first system information 220 includes a dedicated field associated with additional system information 220, or both. For example, in the case where UE 115-a determines that the first system information 210 includes a dedicated field, UE 115-a may determine the system information request mode based on the information included in the dedicated field. As another example, in the case where UE 115-a determines that the first system information 210 does not include a dedicated field (e.g., a dedicated field is missing in the first system information 210), UE 115-a may determine the system information request mode based on information included in a configuration information element (e.g., SI-RequestConfig-RB) of the first system information 210.

[0153] In some aspects, the UE 115-a may determine a corresponding system information request mode to determine a channel, a resource set (e.g., a BWP), or both on which the request 215 for additional system information 220 may be sent. For example, the corresponding system information request mode may be associated with a PRACH channel, an SRS, a PUSCH, a PUCCH, or any combination thereof. In this regard, the UE 115-a may be configured to determine a channel (e.g., PRACH, PUSCH, PUCCH) and / or a resource set (e.g., an SRS resource set, a time / frequency resource set, an uplink BWP) on which the request 215 for additional system information 220 may be sent based on the determined system information request mode. In some cases, the UE 115-a may be configured to determine that the request 215 for additional system information 220 will be sent within an uplink BWP dedicated to the UE 115 with reduced capability.

[0154] In some aspects, the UE 115-a may determine whether additional system information 220 for a reduced capability UE 115 may be obtained (e.g., acquired, received) based on receiving the first system information 210, evaluating the first system information 220 for a dedicated field, determining a system information request mode, or any combination thereof. Specifically, the UE 115-a may determine whether the additional system information 220 for a reduced capability UE 115 may be received without a request 215, may be received in response to an on-demand request (e.g., request 215), or both. In some aspects, the UE 115-a may be configured to determine whether the additional system information 220 may (or may not) be received based on information included within a dedicated field of the first system information 210 (if any), based on a configuration information element of the first system information 210, or both.

[0155] For example, in the event that the UE 115-a determines that the first system information 210 includes a dedicated field, the UE 115-a may determine, based on the information included in the dedicated field, whether the additional system information 220 may be received in response to an on-demand request (e.g., request 215) and / or without the request 215. As another example, in the event that the UE 115-a determines that the first system information 210 does not include a dedicated field (e.g., the dedicated field is missing in the first system information 210), the UE 115-a may determine, based on information included in a configuration information element (e.g., SI-RequestConfig-RB) of the first system information 210, whether the additional system information 220 may be received in response to an on-demand request (e.g., request 215) and / or without the request 215. In this regard, the dedicated field may serve as an efficient early indicator as to whether the base station 105-a is configured for ODSI of a UE 115 with reduced capability.

[0156] In the case where the first system information 210 includes a dedicated field including one or more bit fields, the UE 115-a may be configured to determine that a first value of a bit field in the one or more bit fields (e.g., OSI-Indicator-RB=1) indicates that the additional system information 220 for the reduced-capability UE 115 may be received in response to an on-demand request (e.g., request 215). Conversely, the UE 115-a may also be configured to determine that a second value of a bit field in the one or more bit fields (e.g., OSI-Indicator-RB=0) indicates that the additional system information 220 for the reduced-capability UE 115 may not be received in response to an on-demand request (e.g., request 215).

[0157] In the event that UE 115-a determines that additional system information 220 for the reduced capability UE 115 may not be obtained with or without an on-demand request (e.g., request 215), UE 115-a may continue wireless communications, select a new cell, or both without obtaining the additional system information 220 for the reduced capability UE 115. For example, in the event that UE 115-a determines that additional system information 220 for the reduced capability UE 115 may not be received in response to request 215 (or without request 215), UE 115-a may search for a new cell supported by base station 105-a and / or a different base station 105 that allows the reduced capability UE 115 (e.g., UE 115-a) to receive additional system information 220 in response to an on-demand request (e.g., request 215) and / or without request 215. As another example, in some cases, the UE 115-a may determine a system information pattern that indicates that the base station 105-a is not configured to send additional system information 220 for the reduced capability UE 115. In this example, the UE 115-a may continue wireless communications without obtaining the additional system information 220 for the reduced capability UE 115 based on the determined system information request pattern, select a new cell, or both.

[0158] In contrast, in the event that the UE 115-a determines that the additional system information 220 for the reduced-capability UE 115 may be received in response to an on-demand request (e.g., request 215), the UE 115-a, the base station 105-a, or both may determine a set of thresholds for sending the request 215 for the additional system information. In some aspects, the UE 115-a may determine the set of thresholds for sending the request 215 based on information included within a dedicated field of the first system information 210, if any, based on information included within a configuration information element of the second system information 210, or both. In this regard, the UE 115-a may determine the set of thresholds based on receiving the first system information 210, evaluating the first system information 310 for the dedicated field, determining a system information request mode, determining whether the additional system information 220 for the reduced-capability UE 115 may be obtained with and / or without the request 215, or any combination thereof.

[0159] In the case where the dedicated field includes one or more bit fields, the UE 115-a can determine the threshold set based on one or more values ​​of the one or more bit fields in the dedicated field. In some aspects, the UE 115-a can be pre-configured (e.g., via RRC signaling or other control signaling) to interpret different bit values ​​of the dedicated field and / or configuration information element as indicating different threshold sets. For example, the UE 115-a can receive a control message (e.g., an RRC message) indicating that a first value of a bit field of the dedicated field is associated with a first threshold set, and a second value of a bit field of the dedicated field is associated with a second threshold set. Subsequently, the value of the bit field of the dedicated field within the first system information 210 can be used to indicate which threshold set the UE 115-a will use.

[0160] The set of thresholds for sending the request 215 for the additional system information 220 may include any thresholds or parameters known in the art. For example, the set of thresholds may include a threshold associated with the bandwidth capability of the UE 115-a (e.g., a minimum bandwidth capability that the UE 115-a may have to be able to request the additional system information 220), a threshold associated with the number of antennas of the UE 115-a (e.g., a minimum number of antennas that the UE 115-a may have to be able to request the additional system information 220), or both. As another example, the set of thresholds may include a threshold associated with the signal quality of a signal received at the UE 115 (e.g., an RSRP threshold, a reference signal received quality (RSRQ) threshold, a received signal strength indicator (RSSI) threshold, an SNR threshold, a signal to interference plus noise ratio (SINR) threshold), a threshold associated with the number of requests 215 for the additional system information 220 that the UE 115-a may send (e.g., a maximum number of requests 215 that the UE 115-a may send), or any combination thereof.

[0161] The base station 105-a may indicate a threshold set via the first system information 210 to indicate which UEs 115 may be allowed to request additional system information 220. In order to request the additional system information 220, the UE 115-a may be required to meet one or more thresholds (e.g., all) in the threshold set. In this regard, the UE 115-a may be configured to determine the threshold set and determine whether the UE 115-a meets the one or more thresholds in order to determine whether the UE 115-a is able to send a request 215 for the additional system information 220.

[0162] In some aspects, the UE 115-a, the base station 105-a, or both may determine a set of additional system information (e.g., RB-SIB1, RB-SIB2, RB-SIB3) that may be requested from the base station 105-a. In some aspects, the UE 115-a may determine the set of additional system information that may be requested based on information included within a dedicated field of the first system information 210 (if any), based on information included within a configuration information element of the first system information 210, or both. In this regard, the UE 115-a may determine the set of additional system information that may be requested based on receiving the first system information 210, evaluating the first system information for the dedicated field, determining a system information request mode, determining whether additional system information 220 for a reduced capability UE 115 may be obtained with and / or without a request 215, determining a threshold for sending a request 215, or any combination thereof.

[0163] In some aspects, the UE 115-a, the base station 105-a, or both may determine a set of parameters that the base station 105-a may use to send the additional system information 220. Additionally or alternatively, the UE 115-a may determine a set of parameters that the UE 115-a may use to receive the additional system information 220. In some aspects, the UE 115-a may determine the set of parameters for sending and / or receiving the additional system information 220 based on information included within a dedicated field of the first system information 210, if any, based on information included within a configuration information element of the first system information 210, or both. In this regard, the UE 115-a may determine the set of parameters for sending and / or receiving the additional system information 220 based on receiving the first system information 210, evaluating the first system information 220 for the dedicated field, determining a system information request mode, determining whether the additional system information 220 for the reduced capability UE 115 may be obtained with and / or without a request 215, determining a threshold for sending a request 215, determining a set of additional system information that may be requested, or any combination thereof.

[0164] In some aspects, the set of parameters that the base station 105-a may use to send the additional system information 220 (e.g., the parameters that the UE 115-a may use to receive the additional system information) may include an MCS, a code rate, a set of time resources, a set of frequency resources, a set of space resources, or any combination thereof. For example, the parameters that the base station 105-a may use to send the additional system information 220 may include a configured BWP associated with (e.g., dedicated to) a reduced capability UE 115, a regular UE 115, or both. In this regard, the base station 105-a may indicate and the UE 115-a may determine, based on information included in a dedicated field and / or a configuration information element of the first system information 210, a coverage enhancement scheme that may be used to send and / or receive the additional system information 220. In some aspects, one or more parameters in the set of parameters that may be used to send and / or receive the additional system information 220 (e.g., a BWP for sending / receiving the additional system information 220) may be different from at least one parameter used to send and / or receive the first system information 210.

[0165] In some aspects, the UE 115-a, the base station 105-a, or both may determine a periodicity associated with the additional system information 220. The periodicity may include a periodicity during which the base station 105-a may send the additional system information 220. In some cases, the periodicity associated with the additional system information 220 may be different from a periodicity associated with the first system information 210 (e.g., a periodicity during which the first system information is transmitted or broadcast). In some aspects, the UE 115-a may determine the periodicity associated with the additional system information 220 based on information included within a dedicated field of the first system information 210, if any, based on information included within a configuration information element of the first system information 210, or both. In this regard, the UE 115-a may determine a period associated with the additional system information 220 based on receiving the first system information 210, evaluating the first system information 210 for a dedicated field, determining a system information request mode, determining whether additional system information 220 for the reduced capability UE 115 may be obtained with and / or without a request 215, determining a threshold for sending a request 215, determining a set of additional system information that may be requested, determining parameters for sending / receiving the additional system information 220, or any combination thereof.

[0166] In some aspects, the UE 115-a may send the request 215 for additional system information 220. In some aspects, the UE 115-a may send the request 215 for additional system information 220 based on information included within a dedicated field of the first system information 210, if any, based on information included within a configuration information element of the first system information 210, or both. In this regard, the UE 115-a may send the request 215 for additional system information 220 based on receiving the first system information 210, evaluating the first system information 210 for the dedicated field, determining a system information request mode, determining whether additional system information 220 for a reduced capability UE 115 may be obtained, determining a threshold for sending the request 215, determining a set of additional system information that may be requested, determining parameters for sending / receiving the additional system information 220, determining a periodicity for the additional system information 220, or any combination thereof.

[0167] In some aspects, the UE 115-a may send the request 215 for the additional system information 220 based on a determined system information request mode. For example, the determined system information request mode may be associated with a given set of resources (e.g., PRACH resources, SRS resources, PUSCH resources, PUCCH resources, configured or dedicated BWPs, or any combination thereof), and the UE 115-a may send the request 215 based on (e.g., based on) the determined set of resources. For example, depending on the determined system information request mode, the UE 115-a may send the request 215 via a set of resources associated with the PRACH, SRS, PUSCH, PUCCH, or any combination thereof. As another example, the UE 115-a may send the request 215 via an uplink BWP associated with (e.g., dedicated to) a reduced capability UE 115.

[0168] In some aspects, UE 115-a may send request 215 based on determining that UE 115-a satisfies at least one threshold in a determined set of thresholds. For example, the set of thresholds may include a minimum bandwidth capability threshold. In this example, UE 115-a may determine that the bandwidth capabilities of UE 115-a meet (e.g., exceed) the minimum bandwidth capability threshold, and may therefore send request 215 based on determining that UE 115-a satisfies the minimum bandwidth capability threshold. As previously mentioned herein, UE 115-a may be configured to determine that it may send request 215 based on determining that it satisfies only a subset of a set of thresholds, determining that it satisfies every threshold in a set of thresholds, or both.

[0169] In some aspects, the UE 115-a may indicate to the base station 105-a via the request 215 (and / or another uplink transmission) an indication of which additional system information 220 is being requested, an indication of one or more parameters (e.g., a coverage enhancement scheme) that the base station 105-a may use to send the additional system information, or both. For example, the UE 115-a may determine a set of additional system information that may be requested based on the first system information 210, determine (e.g., select) which additional system information 220 to request from the set of additional system information, and may indicate to the base station 105-a via the request 215 and / or another uplink transmission the determined (e.g., selected) additional system information 220.

[0170] As another example, the UE 115-a may determine a set of parameters (e.g., coverage enhancement scheme, MCS, code rate, time / frequency resources, BWP) that the base station 105-a may use to send additional system information 220. In this example, the UE 115-a may determine (e.g., select) one or more parameters from the set of parameters to be used by the base station 105-a to send the additional system information 220, and may indicate the determined (e.g., selected) parameters to the base station 105-a via the request 215 and / or another uplink transmission. For example, the UE 115-a may determine a set of MCSs that may be used by the base station 105-a to send the additional system information 220, and may indicate in the request 215 which MCS the base station 105-a should use to send the additional system information 220. As another example, the UE 115-a may determine a set of downlink BWPs that may be used by the base station 105-a to send the additional system information 220, and may indicate in the request 215 which BWP (e.g., a downlink BWP dedicated to the reduced-capability UE 115) the base station 105-a should use to send the additional system information 220. In some cases, the parameters selected and indicated to the base station 105-a that the base station 105-a may use to send the additional system information 220 may be different from at least one parameter that the base station 105-a may use to send the first system information 210.

[0171] In some cases, UE 115-a may be configured to obtain additional system information 220 without sending request 215 and may therefore avoid sending Figure 2 . For example, in some cases, the determined system information request mode may indicate that UE 115-a does not need to send request 215 for additional system information 220. In this example, UE 115-a may be configured to avoid sending request 215 and may instead monitor additional system information 220 to obtain additional system information 220 according to the determined system information request mode.

[0172] In some aspects, the UE 115-a may obtain (e.g., receive) additional system information 220 for the reduced capability UE 115. In some aspects, the additional system information 220 may include a second type of SIB (e.g., RB-SIB2, RB-SIB3) that is different from the first type of SIB associated with the first system information 210. The UE 115-a may obtain the additional system information 220 based on information included in a dedicated field of the first system information 210 when the dedicated field is present, based on information included within a configuration information element of the first system information 210 when the dedicated field is not present in the first system information 220, or both. In some cases, the UE 115-a may receive the additional system information 220 within a downlink BWP that is associated with the reduced capability UE 115, the regular UE 115, or both (e.g., dedicated to the reduced capability UE 115, the regular UE 115, or both).

[0173] In this regard, the UE 115-a may obtain (e.g., receive) the additional system information 220 for the reduced capability UE 115 based on receiving the first system information 210, evaluating the first system information 210 for a dedicated field, determining a system information request mode, determining whether additional system information 220 for the reduced capability UE 115 may be obtained with and / or without a request 215, determining a threshold for sending a request 215, determining a set of additional system information that may be requested, determining parameters for sending / receiving the additional system information 220, determining a periodicity for the additional system information 220, sending a request 215, or any combination thereof. Furthermore, the UE 115-a may be configured to obtain the additional system information 220 based on indicating to the base station 105-a which additional system information 220 is being requested, which parameters the base station 105-a will use to send the additional system information 220, or any combination thereof.

[0174] In some cases, the base station 105-a may be configured to determine a number of reduced-capability UEs 115 communicatively coupled to the base station 105-a. The base station 105-a may determine the number of reduced-capability UEs 115 communicatively coupled to the base station 105-a in order to determine whether it should continue to send (e.g., broadcast) additional system information 220 or whether it may end broadcasting the additional system information. In some aspects, the base station 105-a may be configured to refrain from sending (e.g., broadcasting) the additional system information 220 (e.g., end broadcasting the additional system information 220) if the base station 105-a determines that the number of reduced-capability UEs 115 for wireless communication with the base station 105-a is less than a threshold number of reduced-capability UEs 115. For example, the base station 105-a may be configured to refrain from sending (e.g., broadcasting) the additional system information 220 if the base station 105-a determines that there are no reduced-capability UEs 115 for wireless communication with the base station 105-a. Additionally or alternatively, the base station 105-a may be configured to avoid sending the additional system information 220 after a predetermined time, after a predetermined number of broadcasts, or any combination thereof when the UE 115-a (e.g., UE 115-a) requesting the additional system information 220 is no longer in wireless communication with the base station 105-a.

[0175] Techniques described herein may provide for on-demand broadcasting of system information, which may reduce signaling overhead and result in more efficient use of resources within the wireless communication system 200. Specifically, techniques described herein may enable a base station 105-a of the wireless communication system 200 to broadcast additional system information upon request, thereby reducing signaling overhead and preventing wasted resources in situations where there are few (or no) reduced capability UEs 115 that want to receive the additional system information.

[0176] Figure 3 An example of a process flow 300 supporting techniques for adaptively requesting ODSI in accordance with aspects of the present disclosure is shown. In some examples, the process flow 300 can implement or be implemented by aspects of the wireless communication system 100, the wireless communication system 200, or both. For example, the process flow 300 can illustrate that a reduced-capability UE 115-c receives first system information from a base station 105-b, evaluates whether the first system information includes a dedicated field indicating whether additional system information for the reduced-capability UE 115 is available to be received in response to the on-demand request, and obtains the additional system information based on information included in the first system information, as described with reference to FIG. Figure 1-2 Described etc.

[0177] In some examples, the operations shown in process flow 300 can be performed by hardware (e.g., including circuits, processing blocks, logic components, and other components), code executed by a processor (e.g., software or firmware), or any combination thereof. The following alternative examples can be implemented in which some of the steps are performed in a different order than described or not performed at all. In some cases, the steps may include additional features not mentioned below, or additional steps may be added.

[0178] At 305, a UE 115-c (e.g., a reduced capability UE 115-c) may receive first system information from a base station 105-b. In some aspects, the first system information may be configured for (e.g., receivable by) a reduced capability UE 115 that includes a bandwidth capability below a threshold. For example, the first system information may include a first type of SIB (e.g., RB-SIB1), a first type of MIB (e.g., RB-MIB), or a combination thereof.

[0179] In some aspects, the first system information received at 305 may be received via a dedicated PBCH associated with the reduced capability UE 115, a dedicated PDSCH associated with the reduced capability UE 115, a dedicated downlink BWP associated with the reduced capability UE 115, or any combination thereof. In other cases, the first system information may be received via a channel that is not associated with the reduced capability UE 115 (e.g., not dedicated to the reduced capability UE 115). In some aspects, the first system information received by UE 115-c may be multiplexed with other system information receivable by other UEs 115 (e.g., full capability UEs 115). For example, in some cases, the base station 105-b may multiplex the system information receivable by the reduced capability UE 115 (e.g., UE 115-c) with other system information receivable by the full capability UE 115 to generate the first system information sent at 305. At 310, the UE 115-c may evaluate the first system information for a dedicated field that includes an indicator that additional system information for a reduced-capability UE 115 (e.g., UE 115-c) may be received in response to an on-demand request. In this regard, the UE 115-c may determine whether the first system information includes a dedicated field that indicates whether the network supports ODSI for the reduced-capability UE 115. In some aspects, the dedicated field within the first system information may include one or more bit fields.

[0180] At 315, the UE 115-c may determine a system information request mode for requesting additional system information. The system information request mode may indicate whether the base station 105-b supports broadcasts of additional system information for the reduced capability UE 115. Additionally or alternatively, the system information request mode may indicate a channel and / or resource (e.g., uplink BWP) for requesting the additional system information. In this regard, the UE 115-c may determine the system information request mode to determine whether the additional system information for the reduced capability UE 115 may be received without an on-demand request, whether the additional system information for the reduced capability UE 115 may be received in response to an on-demand request, a channel (e.g., a resource) that may be used to request the additional system information, or any combination thereof.

[0181] In some aspects, the UE 115-c may determine the system information request mode based on information included within a dedicated field of the first system information, information included within a configuration information element of the first system information, or both. In this regard, the UE 115-c may determine the system information request mode at 315 based on receiving the first system information at 305, evaluating whether the first system information includes a dedicated field at 310, or both. For example, in the event that the UE 115-c determines at 310 that the first system information includes a dedicated field, the UE 115-c may determine the system information request mode at 315 based on information included in the dedicated field. As another example, in the event that the UE 115-c determines at 310 that the first system information does not include a dedicated field (e.g., a dedicated field is missing in the first system information), the UE 115-c may determine the system information request mode at 315 based on information included in a configuration information element (e.g., SI-RequestConfig-RB) of the first system information.

[0182] In some implementations, the first system information may indicate the time / frequency resources for receiving the additional system information. For example, the first system information may indicate a downlink BWP (e.g., a dedicated downlink BWP for a UE 115 with reduced capability) that will be used to receive the additional system information. In this regard, the first system information may indicate a downlink BWP configuration for receiving the first system information and / or the additional system information. In some aspects, the downlink BWP for the additional system information may be the same as or different from the downlink BWP for receiving the first system information. In other words, the first downlink BWP associated with the first system information may be shared or configured separately with the second downlink BWP for the additional system information.

[0183] In some aspects, the UE 115-c may determine a corresponding system information request mode at 315 to determine a channel, a resource set (e.g., a BWP), or both on which a request for additional system information may be sent. For example, the corresponding system information request mode may be associated with a PRACH channel, an SRS, a PUSCH, a PUCCH, or any combination thereof. In this regard, the UE 115-c may be configured to determine a channel (e.g., a PRACH, a PUSCH, a PUCCH) and / or a resource set (e.g., an SRS resource set, a time / frequency resource set) on which a request for additional system information may be sent based on the system information request mode determined at 315. In other words, the first system information may indicate an uplink BWP (e.g., an uplink BWP configuration) for sending a request for additional system information.

[0184] At 320, the UE 115-c may determine whether additional system information for the reduced capability UE 115 may be received (e.g., obtained) The UE 115-c may determine whether additional system information for the reduced capability UE 115 may be received in response to the on-demand request based on receiving the first system information at 305, evaluating the first system information for a dedicated field at 310, determining the system information request mode at 315, or any combination thereof.

[0185] In some aspects, the UE 115-c may determine whether additional system information for the reduced-capability UE 115 may be received without a request, whether the additional system information may be received in response to an on-demand request, or both. In some aspects, the UE 115-c may be configured to determine whether the additional system information may (or may not) be received based on information included within a dedicated field of the first system information (if any), based on a configuration information element of the first system information, or both. For example, in the event that the UE 115-c determines at 310 that the first system information includes a dedicated field, the UE 115-c may determine at 320 whether the additional system information may be received in response to an on-demand request and / or without a request based on the information included in the dedicated field. As another example, where the UE 115-c determines at 310 that the first system information does not include a dedicated field (e.g., the dedicated field is missing in the first system information), the UE 115-c may determine at 320 whether additional system information may be received in response to an on-demand request and / or without a request based on information included in a configuration information element (e.g., SI-RequestConfig-RB) of the first system information. In this regard, the dedicated field may serve as an efficient early indicator of whether the base station 105-b is configured for ODSI of a reduced-capability UE 115.

[0186] In the case where the first system information includes a dedicated field including one or more bit fields, the UE 115-c may be configured to determine that a first value of a bit field in the one or more bit fields (e.g., OSI-Indicator-RB=1) indicates that additional system information for the reduced-capability UE 115 may be received in response to an on-demand request. Conversely, the UE 115-c may also be configured to determine that a second value of a bit field in the one or more bit fields (e.g., OSI-Indicator-RB=0) indicates that additional system information for the reduced-capability UE 115 may not be received in response to an on-demand request.

[0187] In the event that the UE 115 - c determines that additional system information for the reduced capability UE 115 may not be obtained with or without an on-demand request, the process flow 300 may continue to 325 .

[0188] At 325, the UE 115-c may continue wireless communications, select a new cell, or both without obtaining additional system information for the reduced capability UE 115. For example, in the event that the UE 115-c determines that additional system information for the reduced capability UE 115 may not be received in response to an on-demand request (or without a request), the UE 115-c may search for a new cell supported by the base station 105-b and / or a different base station 105 that allows the reduced capability UE 115-c to receive additional system information in response to an on-demand request and / or without a request. As another example, in some cases, the UE 115-c may determine a system information mode at 315 that indicates that the base station 105-b is not configured to send additional system information for the reduced capability UE 115. In this example, the UE 115-c may continue wireless communications, select a new cell, or both without obtaining additional system information for the reduced capability UE 115 based on the determined system information request mode.

[0189] Reference will be made again to 320 of process flow 300. Where the UE 115-c determines at 320 that additional system information for the reduced capability UE 115 may be received in response to an on-demand request, process flow 300 may proceed to 330.

[0190] At 330, the UE 115-c, the base station 105-b, or both may determine a set of thresholds for sending a request for additional system information. In some aspects, the UE 115-c may determine the set of thresholds for sending a request based on information included within a dedicated field of the first system information, if any, based on information included within a configuration information element of the second system information, or both. In this regard, the UE 115-c may determine the set of thresholds based on receiving the first system information at 305, evaluating the first system information for the dedicated field at 310, determining a system information request mode at 315, determining whether additional system information for a reduced capability UE 115 may be obtained at 320, or any combination thereof.

[0191] In the case where the dedicated field includes one or more bit fields, the UE 115-c may determine the threshold set based on one or more values ​​of the one or more bit fields in the dedicated field. In some aspects, the UE 115-c may be pre-configured (e.g., via RRC signaling or other control signaling) to interpret different bit values ​​of the dedicated field and / or configuration information element as indicating different threshold sets. For example, the UE 115-c may receive a control message (e.g., an RRC message) indicating that a first value of a bit field of the dedicated field is associated with a first threshold set, and a second value of a bit field of the dedicated field is associated with a second threshold set. Subsequently, the value of the bit field of the dedicated field within the first system information may be used to indicate which threshold set the UE 115-c is to use.

[0192] The set of thresholds for sending a request for additional system information may include any thresholds or parameters known in the art. For example, the set of thresholds may include thresholds associated with the bandwidth capabilities of the UE 115-c (e.g., the minimum bandwidth capabilities that the UE 115-c may have to be able to request additional system information), thresholds associated with the number of antennas of the UE 115-c (e.g., the minimum number of antennas that the UE 115-c may have to be able to request additional system information), or both. As another example, the set of thresholds may include thresholds associated with the signal quality of a signal received at the UE 115 (e.g., an RSRP threshold, an RSRQ threshold, an RSSI threshold, an SNR threshold, an SINR threshold), thresholds associated with the number of requests for additional system information that the UE 115-c may send (e.g., the maximum number of requests that the UE 115-c may send), or any combination thereof.

[0193] The base station 105-b may indicate a threshold set via the first system information to indicate which UEs 115 may be allowed to request additional system information. In order to request the additional system information, the UE 115-c may be required to meet one or more thresholds (e.g., all) in the threshold set. In this regard, the UE 115-c may be configured to determine the threshold set and determine whether the UE 115-c meets the one or more thresholds in order to determine whether the UE 115-c is able to send a request for additional system information.

[0194] At 335, the UE 115-c, the base station 105-b, or both may determine a set of additional system information (e.g., RB-SIB1, RB-SIB2, RB-SIB3) that may be requested from the base station 105-b. In other words, the UE 115-c may determine what type of additional system information may be obtained. In some aspects, the UE 115-c may determine the set of additional system information that may be requested based on information included within a dedicated field of the first system information (if any), based on information included within a configuration information element of the first system information, or both. In this regard, the UE 115-c may determine the set of additional system information that may be requested based on receiving the first system information at 305, evaluating the first system information for the dedicated field at 310, determining a system information request mode at 315, determining whether additional system information for a UE 115 with reduced capability may be obtained at 320, determining a threshold for sending a request at 330, or any combination thereof.

[0195] The additional system information that may be obtained may include SSBs, other downlink broadcast reference signals, COREST, common search space (CSS) configurations for random access procedures, paging and system information update information, or any combination thereof. Additionally or alternatively, the additional system information may include a second type of SIB (e.g., a second type different from the first type of SIB associated with the first system information), a second type of MIB (e.g., a second type different from the first type of MIB associated with the first system information), or both

[0196] At 340, the UE 115-c, the base station 105-b, or both may determine a set of parameters that the base station 105-b may use to send the additional system information. Additionally or alternatively, the UE 115-c may determine a set of parameters that the UE 115-c may use to receive the additional system information. In some aspects, the UE 115-c may determine a set of parameters for sending and / or receiving the additional system information based on information included within a dedicated field of the first system information, if any, based on information included within a configuration information element of the first system information, or both. In this regard, the UE 115-c may determine a set of parameters (e.g., resources, BWP) for sending and / or receiving the additional system information based on receiving the first system information at 305, evaluating the first system information for the dedicated field at 310, determining a system information request mode at 315, determining whether additional system information for a reduced capability UE 115 may be obtained at 320, determining a threshold for sending a request at 330, determining a set of additional system information that may be requested at 335, or any combination thereof.

[0197] In some aspects, the set of parameters that the base station 105-b may use to send the additional system information (e.g., the parameters that the UE 115-c may use to receive the additional system information) may include an MCS, a code rate, a time resource set, a frequency resource set (BWP), a space resource set, or any combination thereof. In this regard, the base station 105-b may indicate and the UE 115-c may determine, based on information included in the dedicated field and / or the configuration information element of the first system information, a coverage enhancement scheme that may be used to send and / or receive the additional system information. In some aspects, one or more parameters in the set of parameters determined at 340 may be different from at least one parameter used to send and / or receive the first system information at 305.

[0198] At 345, the UE 115-c, the base station 105-b, or both may determine a period associated with the additional system information. The period may include a period during which the base station 105-b may send the additional system information. In some cases, the period associated with the additional system information may be different from the period associated with the first system information (e.g., the period during which the first system information is transmitted or broadcast). In some aspects, the UE 115-c may determine the period associated with the additional system information based on information included within a dedicated field of the first system information (if any), based on information included within a configuration information element of the first system information, or both.

[0199] In some aspects, the periodicity of the additional system information may depend on the content of the additional system information (e.g., based on the type of the additional system information). In this regard, the periodicity of the additional system information may be based on whether the additional system information includes SSBs, other downlink broadcast reference signals (e.g., broadcast reference signals for synchronization, radio resource management (RRM), radio link monitoring (RLM)), COREST, CSS configuration for scheduling system information and random access procedures, paging and system information update information, a second type of SIB, a second type of MIB, or any combination thereof.

[0200] In this regard, the UE 115-c may determine a period associated with additional system information based on receiving first system information at 305, evaluating the first system information for a dedicated field at 310, determining a system information request mode at 315, determining whether additional system information for a reduced-capability UE 115 may be obtained at 320, determining a threshold for sending a request at 330, determining a set of additional system information that may be requested at 335, determining parameters for sending / receiving additional system information at 340, or any combination thereof.

[0201] At 350, the UE 115-c may send a request for additional system information. In some aspects, the UE 115-c may send the request for additional system information based on information included within a dedicated field of the first system information (if any), based on information included within a configuration information element of the first system information, or both. Additionally or alternatively, the UE 115-c may send the request for additional system information via an uplink BWP dedicated to the reduced capability UE 115. In this regard, the UE 115-c may send the request for additional system information based on receiving the first system information at 305, evaluating the first system information for the dedicated field at 310, determining a system information request mode at 315, determining whether additional system information for the reduced capability UE 115 can be obtained at 320, determining a threshold for sending the request at 330, determining a set of additional system information that can be requested at 335, determining a parameter for sending / receiving the additional system information at 340, determining a periodicity of the additional system information at 345, or any combination thereof.

[0202] In some aspects, the UE 115-c may determine a system information request mode at 315, and may send a request for additional system information based on the determined system information request mode. For example, the determined system information request mode may be associated with a given set of resources (e.g., PRACH resources, SRS resources, PUSCH resources, PUCCH resources, BWP, or any combination thereof), and the UE 115-c may send the request at 350 based on (e.g., based on) the determined set of resources. For example, depending on the determined system information request mode, the UE 115-c may send the request at 350 via a set of resources associated with PRACH, SRS, PUSCH, PUCCH, uplink BWP, or any combination thereof.

[0203] In some aspects, the UE 115-c may send the request at 350 based on a determination that the UE 115-c satisfies at least one threshold in the set of thresholds determined at 330. For example, the set of thresholds may include a minimum bandwidth capability threshold. In this example, the UE 115-c may determine that the bandwidth capabilities of the UE 115-c meet (e.g., exceed) the minimum bandwidth capability threshold, and may therefore send the request at 350 based on a determination that the UE 115-c satisfies the minimum bandwidth capability threshold. As previously mentioned herein, the UE 115-c may be configured to determine at 350 that it may send the request based on a determination that it satisfies only a subset of the set of thresholds, a determination that it satisfies every threshold in the set of thresholds, or both.

[0204] In some aspects, the UE 115-c may indicate to the base station 105-b, via the request and / or another uplink transmission, an indication of which additional system information is being requested, an indication of one or more parameters (e.g., a coverage enhancement scheme) that the base station 105-b may use to send the additional system information, or both. For example, the UE 115-c may determine a set of additional system information that may be requested at 335. In this example, the UE 115-c may determine (e.g., select) which additional system information to request from the set of additional system information, and may indicate to the base station 105-b, via the request and / or another uplink transmission, the determined (e.g., selected) additional system information.

[0205] As another example, at 340 UE 115-c may determine a set of parameters (e.g., coverage enhancement scheme, MCS, code rate, time / frequency resources) that base station 105-b may use to send additional system information. In this example, UE 115-c may determine (e.g., select) one or more parameters from the set of parameters to be used by base station 105-b to send additional system information, and may indicate the determined (e.g., selected) parameters to base station 105-b via a request and / or another uplink transmission. For example, UE 115-c may determine a set of MCSs that may be used by base station 105-b to send additional system information, and may indicate in a request which MCS base station 105-b should use to send the additional system information. In some cases, the parameters selected and indicated to base station 105-b that base station 105-b may use to send additional system information may be different from at least one parameter that base station 105-b may use to send the first system information at 305.

[0206] In some cases, the UE 115-c may be configured to obtain the additional system information without sending a request, and may therefore avoid sending a request at 350. For example, in some cases, the system information request mode determined at 315 may indicate that the UE 115-c does not need to send a request for additional system information. In this example, the UE 115-c may be configured to avoid sending a request at 350, and may instead monitor the additional system information to obtain the additional system information according to the determined system information request mode.

[0207] At 355, the UE 115-c may obtain (e.g., receive) additional system information for the reduced capability UE 115. In some aspects, the additional system information may include a second type of SIB (e.g., RB-SIB2, RB-SIB3) different from the first type of SIB associated with the first system information, a second type of MIB different from the first type of MIB associated with the first system information, or any combination thereof. For example, if additional SSBs (e.g., PSS, SSS, PBCH) are sent for the reduced capability UE 115 in a separately configured downlink BWP, the additional MIB may also be sent in the PBCH as part of the additional system information.

[0208] The UE 115-c may obtain the additional system information 220 at 355 based on information included in a dedicated field of the first system information when the dedicated field is present, based on information included within a configuration information element of the first system information when the dedicated field is not present, or both. For example, the UE 115-c may obtain the additional system information via a downlink BWP that is associated with (e.g., dedicated to) the reduced capability UE 115.

[0209] In this regard, the UE 115-c may obtain (e.g., receive) additional system information for the reduced capability UE 115 based on receiving the first system information at 305, evaluating the first system information for a dedicated field at 310, determining a system information request mode at 315, determining whether additional system information for the reduced capability UE 115 may be obtained at 320, determining a threshold for sending a request at 330, determining a set of additional system information that may be requested at 335, determining parameters for sending / receiving the additional system information at 340, determining a periodicity for the additional system information at 345, sending a request at 350, or any combination thereof. Furthermore, the UE 115-c may be configured to obtain the additional system information based on indicating to the base station 105-b which additional system information is being requested, which parameters the base station 105-b will use to send the additional system information, or any combination thereof.

[0210] In some cases, the base station 105-b may be configured to determine a number of reduced-capability UEs 115 that are communicatively coupled to the base station 105-b. The base station 105-b may determine the number of reduced-capability UEs 115 that are communicatively coupled to the base station 105-b in order to determine whether it should continue to send (e.g., broadcast) additional system information or whether it may end the broadcast of the additional system information. In some aspects, the base station 105-b may be configured to avoid sending (e.g., broadcasting) additional system information (e.g., end the broadcast of the additional system information) if the base station 105-b determines that the number of reduced-capability UEs 115 that are communicatively coupled to the base station 105-b is less than a threshold number of reduced-capability UEs 115. For example, the base station 105-b may be configured to avoid sending (e.g., broadcasting) additional system information if the base station 105-b determines that there are no reduced-capability UEs 115 that are communicatively coupled to the base station 105-b. Additionally or alternatively, the base station 105-b may be configured to avoid sending additional system information at 355 after a predetermined time, after a predetermined number of broadcasts, or any combination thereof when the UE 115-c requesting the additional system information is no longer in wireless communication with the base station 105-b.

[0211] Techniques described herein may provide for on-demand broadcasting of system information, which may reduce signaling overhead and result in more efficient use of resources within a wireless communication system, such as, for example, wireless communication system 100 or 200. Specifically, techniques described herein may enable a base station 105-b of a wireless communication system to broadcast additional system information upon request, thereby reducing signaling overhead and preventing wasted resources in situations where there are few (or no) UEs 115 with reduced capabilities that want to receive the additional system information.

[0212] Figure 4 A resource configuration 400 supporting techniques for adaptively requesting ODSI according to aspects of the present disclosure is shown. Aspects of the resource configuration 400 may implement or be implemented by aspects of the wireless communication system 100, the wireless communication system 200, the process flow 300, or any combination thereof.

[0213] As mentioned previously herein, some wireless communication systems (e.g., wireless communication systems 100, 200) may be configured with BWPs associated with or dedicated to reduced capability UEs 115 and / or regular UEs 115. In some cases, the wireless communication system may include different sets of downlink and uplink BWPs that are dedicated to reduced capability UEs 115 and regular UEs 115, respectively. For example, Figure 4 As shown, the wireless communication system can be configured with a resource configuration 400, which includes an initial uplink BWP 410 and an initial downlink BWP 415 for a regular UE 115. The initial downlink BWP 415 can be associated with a cell-defined SSB (CD-SSB). In addition, the wireless communication system can be configured with an initial uplink BWP 420, an initial downlink BWP 425, an active uplink BWP 430, and an active downlink BWP 435 for a UE 115 with reduced capabilities. Each of the corresponding BWPs of the resource configuration 400 can be included within the carrier bandwidth 405 of the corresponding network or serving cell.

[0214] In some aspects, the corresponding BWP of the resource configuration 400 can be pre-configured, configured via control signaling (e.g., RRC signaling, MAC-CE signaling, SIB message), or both. The BWPs dedicated to the reduced-capability UE 115 (e.g., initial uplink BWP 420, initial downlink BWP 425, active uplink BWP 430, and active downlink BWP 435) can span a smaller bandwidth than the BWPs for regular UEs 115, and can be configured so as not to exceed the expected maximum bandwidth capability supported by the reduced-capability UE 115.

[0215] In some aspects, a regular UE 115 (e.g., a non-reduced capability UE 115) may be configured to communicate via an initial uplink BWP 410 and an initial downlink BWP 415. Additionally or alternatively, a regular UE 115 may be configured to communicate via a BWP (e.g., an initial uplink BWP 420, an initial downlink BWP 425, an active uplink BWP 430, and an active downlink BWP 435) dedicated to a reduced capability UE 115. In contrast, a reduced capability UE 115 may not be able to communicate via a BWP associated with a regular UE 115 (e.g., dedicated to a regular UE 115), and may therefore communicate via a BWP (e.g., an initial uplink BWP 420, an initial downlink BWP 425, an active uplink BWP 430, and an active downlink BWP 435) dedicated to a reduced capability UE 115. Specifically, the reduced capability UE 115 may receive system information (e.g., the first information 210), additional system information (e.g., the additional system information 220), or both via a downlink BWP dedicated to the reduced capability UE 115, and may send a request for additional system information via an uplink BWP dedicated to the reduced capability UE 115.

[0216] For example, when performing the initial access process, the UE 115 with reduced capability (e.g., UE 115-a, 115-c with reduced capability) can select a serving cell, and can detect an uplink signal configuration or an uplink channel configuration for sending an ODSI request. Each corresponding uplink signal / channel configuration can be associated with a corresponding resource configuration (e.g., resource configuration 400), and the resource configuration includes a resource set (BWP) associated with a conventional and / or reduced UE 115 or dedicated to a conventional and / or reduced UE 115 with reduced capability. The UE 115 with reduced capability can send an ODSI request on a pre-configured uplink signal / channel based on the uplink signal / channel configuration. For example, the UE 115 can send an ODSI request via an initial uplink BWP 420 associated with the UE 115 with reduced capability (e.g., dedicated to the UE 115 with reduced capability).

[0217] Upon receiving the ODSI request from the reduced capability UE 115, the network (e.g., base station 105-a, 105-b) may begin broadcasting RB-SSBs, RB-MIBs, and / or RB-SIBs dedicated to the reduced capability UE 115 via the initial downlink BWP 425 associated with the reduced capability UE 115. System information updates for the reduced capability UE 115 may be transmitted via a dedicated RB-SIB message on the initial downlink BWP 425. In addition, msg2 and msg4 of the four-step RACH procedure may be sent via the initial downlink BWP 425, as well as msgB of the two-step RACH procedure and PDCCH scheduling for msg2, msg4, msgB, and retransmissions for msg3. In some aspects, the initial downlink / uplink configuration for the UE 115 with reduced capability (e.g., the configuration of the initial uplink BWP 420 and the initial downlink BWP 425) may be included in or signaled via the system information for cell selection, or may be included in a system information update for the UE 115 with reduced capability.

[0218] After the initial access process, after the RRC connection is established, the UE 115 with reduced capability can be switched to a pair of active uplink / downlink BWPs. For example, the UE 115 can be switched from the initial uplink BWP 420 and the initial downlink BWP 425 to the active uplink BWP 430 and the active downlink BWP 435. The UE 115 can switch between the initial and active BWPs by performing a BWP switching process. In some aspects, the active uplink BWP 430 and the active downlink BWP 435 can be configured or signaled by an RB-SIB, which is sent in the initial downlink BWP 425 dedicated to the UE 115 with reduced capability. The active downlink BWP 435 for the UE 115 with reduced capability may or may not include a dedicated SSB. In some aspects, the UE 115 with reduced capability can measure a periodic tracking reference signal (TRS) and / or a periodic CSI-RS in the active downlink BWP 435. Additionally or alternatively, in the event that SSBs are not transmitted in the active downlink BWP 435, the reduced capability UE 115 may switch to the initial downlink BWP 425 to measure the SSBs. A common search space (CSS) and layer 3 (L3) measurement gaps may be configured for paging and wake-up signals (WUS) in the active downlink BWP 435. Furthermore, system information updates for the reduced capability UE 115 may be based on paging, dedicated RRC signaling, or both. For example, in the event that a paging search space is not configured, system information updates may be transmitted via dedicated RRC signaling on the active downlink BWP 435.

[0219] Figure 5 A block diagram 500 of a device 505 supporting techniques for adaptively requesting ODSI according to aspects of the present disclosure is shown. The device 505 may be an example of aspects of a user equipment (UE) 115 as described herein. The device 505 may include a receiver 510, a transmitter 515, and a communication manager 520. The device 505 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0220] The receiver 510 may provide a means for receiving information (such as packets, user data, control information, or any combination thereof) associated with various information channels (e.g., control channels, data channels, information channels related to techniques for adaptively requesting ODSI). The information may be communicated to other components of the device 505. The receiver 510 may utilize a single antenna or a collection of multiple antennas.

[0221] The transmitter 515 may provide a means for transmitting signals generated by other components of the device 505. For example, the transmitter 515 may transmit information (such as packets, user data, control information, or any combination thereof) associated with various information channels (e.g., control channels related to size-based neural network selection for autoencoder-based communications, data channels, information channels). In some examples, the transmitter 515 may be co-located with the receiver 510 in a transceiver module. The transmitter 515 may utilize a single antenna or a collection of multiple antennas.

[0222] The communication manager 520, the receiver 510, the transmitter 515, or various combinations thereof, or various components thereof may be examples of means for performing various aspects of the techniques for adaptively requesting ODSI described herein.

[0223] In some examples, communication manager 520, receiver 510, transmitter 515, or various combinations or components thereof may be implemented in hardware (e.g., in communication management circuitry). The circuitry may include a processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described in the present disclosure.

[0224] Additionally or alternatively, in some examples, the communication manager 520, the receiver 510, the transmitter 515, or various combinations or components thereof may be implemented in code executed by a processor (e.g., as communication management software or firmware). If implemented in code executed by a processor, the functionality of the communication manager 520, the receiver 510, the transmitter 515, or various combinations or components thereof may be performed by a general purpose processor, a DSP, a central processing unit (CPU), an ASIC, an FPGA, or any combination of these or other programmable logic devices.

[0225] In some examples, communication manager 520 can be configured to perform various operations (e.g., receive, monitor, transmit) using or otherwise cooperating with receiver 510, transmitter 515, or both. For example, communication manager 520 can receive information from receiver 510, send information to transmitter 515, or be integrated in conjunction with receiver 510, transmitter 515, or both to receive information, send information, or perform various other operations as described herein.

[0226] According to an example as disclosed herein, the communication manager 520 may support wireless communication at a UE. For example, the communication manager 520 may be configured to provide or support a unit for receiving first system information from a base station, the first system information being for a reduced capability UE including a UE having a bandwidth capability below a threshold, the UE being a reduced capability UE. The communication manager 520 may be configured to provide or support a unit for evaluating the first system information for a dedicated field, the dedicated field including an indicator that additional system information for the reduced capability UE will be received in response to an on-demand request. The communication manager 520 may be configured to provide or support a unit for the following operations: when the dedicated field is included in the first system information, obtaining additional system information for the reduced capability UE according to information included in the dedicated field, or when the dedicated field is missing in the first system information, obtaining additional system information for the reduced capability UE according to information included in a configuration information element of the first system information.

[0227] By including or configuring the communication manager 520 according to examples as described herein, the device 505 (e.g., a processor controlling or otherwise coupled to the receiver 510, the transmitter 515, the communication manager 520, or a combination thereof) can support improved techniques for on-demand broadcasting of system information for reduced capability UEs 115, which can reduce signaling overhead and result in more efficient use of resources within the wireless communication system. Specifically, the techniques described herein can enable the reduced capability UE 115 to determine whether additional system information is available to be received in response to an on-demand request based on information included in the first system information, thereby enabling the base station 105 to broadcast additional system information for the reduced capability UE 115 as needed, which can reduce signaling overhead and prevent waste of resources when there are few (or no) reduced capability UEs 115 to receive additional system information.

[0228] Based on obtaining additional system information for a UE 115 with reduced capabilities according to information included in the first system information, a processor of the UE 115 (e.g., a processor controlling the receiver 510, the communication manager 520, the transmitter 515, etc.) can reduce processing resources used to obtain the additional system information. For example, by enabling the UE 115 to efficiently determine whether the additional system information is obtainable in response to an on-demand request (and / or without a request), the techniques described herein can reduce the duration that the UE 115 spends monitoring the additional system information, which can reduce power consumption and signaling associated with monitoring the additional system information. By reducing power consumption, the battery life of the UE 115 can be improved. In addition, reducing the duration that the UE 115 spends monitoring the additional system information can result in faster and more efficient acquisition of the additional system information, thereby improving the user experience.

[0229] Figure 6 A block diagram 600 of a device 605 supporting techniques for adaptively requesting ODSI according to aspects of the present disclosure is shown. The device 605 may be an example of aspects of the device 505 or UE 115 as described herein. The device 605 may include a receiver 610, a transmitter 615, and a communication manager 620. The device 605 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0230] The receiver 610 may provide a means for receiving information (such as packets, user data, control information, or any combination thereof) associated with various information channels (e.g., control channels, data channels, information channels related to techniques for adaptively requesting ODSI). The information may be communicated to other components of the device 605. The receiver 610 may utilize a single antenna or a collection of multiple antennas.

[0231] The transmitter 615 may provide a means for transmitting signals generated by other components of the device 605. For example, the transmitter 615 may transmit information (such as packets, user data, control information, or any combination thereof) associated with various information channels (e.g., control channels related to size-based neural network selection for autoencoder-based communications, data channels, information channels). In some examples, the transmitter 615 may be co-located with the receiver 610 in a transceiver module. The transmitter 615 may utilize a single antenna or a collection of multiple antennas.

[0232] The device 605 or its various components may be examples of units for performing various aspects of the technology for adaptively requesting ODSI as described herein. For example, the communication manager 620 may include a first system information reception manager 625, a dedicated field manager 630, an additional system information reception manager 635, or any combination thereof. The communication manager 620 may be an example of various aspects of the communication manager 420 as described herein. In some examples, the communication manager 620 or its various components may be configured to perform various operations (e.g., receive, monitor, send) using the receiver 610, the transmitter 615, or both or in other ways in cooperation with the receiver 610, the transmitter 615, or both. For example, the communication manager 620 may receive information from the receiver 610, send information to the transmitter 615, or be integrated with the receiver 610, the transmitter 615, or both to receive information, send information, or perform various other operations as described herein.

[0233] According to an example as disclosed herein, the communication manager 620 may support wireless communication at a UE. A first system information reception manager 625 may be configured to provide or support a unit for receiving first system information from a base station, the first system information being for a reduced capability UE including a UE having a bandwidth capability below a threshold, the UE being a reduced capability UE. A dedicated field manager 630 may be configured to provide or support a unit for evaluating the first system information for a dedicated field, the dedicated field including an indicator that additional system information for the reduced capability UE will be received in response to an on-demand request. An additional system information reception manager 635 may be configured to provide or support a unit for the following operations: when a dedicated field is included in the first system information, obtaining additional system information for the reduced capability UE according to information included in the dedicated field, or when a dedicated field is missing in the first system information, obtaining additional system information for the reduced capability UE according to information included in a configuration information element of the first system information.

[0234] Figure 7 A block diagram 700 of a communication manager 720 supporting techniques for adaptively requesting ODSI according to various aspects of the present disclosure is shown. The communication manager 720 may be an example of aspects of the communication manager 520, the communication manager 620, or both as described herein. The communication manager 720 or its various components may be examples of units for performing various aspects of the techniques for adaptively requesting ODSI as described herein. For example, the communication manager 720 may include a first system information reception manager 725, a dedicated field manager 730, an additional system information reception manager 735, a request transmission manager 740, a system information request mode manager 745, an additional system information parameter manager 750, an additional system information cycle manager 755, or any combination thereof. Each of these components may communicate with each other directly or indirectly (e.g., via one or more buses).

[0235] According to an example as disclosed herein, the communication manager 720 may support wireless communication at a UE. The first system information reception manager 725 may be configured to provide or support a unit for receiving first system information from a base station, the first system information being for a reduced capability UE including a UE having a bandwidth capability below a threshold, the UE being a reduced capability UE. The dedicated field manager 730 may be configured to provide or support a unit for evaluating the first system information for a dedicated field, the dedicated field including an indicator that additional system information for the reduced capability UE will be received in response to an on-demand request. The additional system information reception manager 735 may be configured to provide or support a unit for the following operations: when a dedicated field is included in the first system information, obtaining additional system information for the reduced capability UE according to information included in the dedicated field, or when the dedicated field is missing in the first system information, obtaining additional system information for the reduced capability UE according to information included in a configuration information element of the first system information.

[0236] In some examples, to support obtaining additional system information for a reduced capability UE, the additional system information reception manager 735 may be configured to provide or support means for determining that the additional system information is to be received in response to an on-demand request based on information included in a dedicated field or configuration information element. In some examples, to support obtaining additional system information for a reduced capability UE, the request transmission manager 740 may be configured to provide or support means for sending a request for additional system information to a base station based on information included in a dedicated field or configuration information element.

[0237] In some examples, to support obtaining additional system information for a reduced capability UE, the system information request mode manager 745 may be configured to provide or support means for identifying a system information request mode based on information included in a dedicated field or configuration information element. In some examples, to support obtaining additional system information for a reduced capability UE, the request sending manager 740 may be configured to provide or support means for sending a request for additional system information to a base station via a resource set associated with a physical random access channel or a sounding reference signal according to the system information request mode.

[0238] In some examples, to support obtaining additional system information for a reduced capability UE, the system information request mode manager 745 may be configured to provide or support means for identifying a system information request mode based on information included in a dedicated field or configuration information element. In some examples, to support obtaining additional system information for a reduced capability UE, the request sending manager 740 may be configured to provide or support means for sending a request for additional system information to a base station via a resource set associated with a physical uplink shared channel or a physical uplink control channel according to the system information request mode.

[0239] In some examples, to support obtaining additional system information for a UE with reduced capabilities, the system information request mode manager 745 may be configured to provide or support a unit for identifying a system information request mode based on information included in a dedicated field or configuration information element. In some examples, to support obtaining additional system information for a UE with reduced capabilities, the request sending manager 740 may be configured to provide or support a unit for sending a request for additional system information to a base station via a resource set associated with a physical random access channel, a sounding reference signal, a physical uplink shared channel, or a physical uplink control channel according to the system information request mode.

[0240] In some examples, to support obtaining additional system information for a reduced capability UE, the system information request mode manager 745 may be configured to provide or support means for identifying a system information request mode based on information included in a dedicated field or configuration information element. In some examples, to support obtaining additional system information for a reduced capability UE, the additional system information reception manager 735 may be configured to provide or support means for obtaining additional system information from a base station according to the system information request mode without sending a request for the additional system information.

[0241] In some examples, the request transmission manager 740 can be configured to provide or support a unit for determining a threshold set for transmitting a request for additional system information based on information included in a dedicated field or configuration information element. In some examples, the request transmission manager 740 can be configured to provide or support a unit for transmitting a request for additional system information to a base station based on determining that the UE satisfies at least one threshold in the threshold set.

[0242] In some examples, the dedicated field includes one or more bit fields. In some examples, determining the threshold set is based on one or more values ​​of the one or more bit fields of the dedicated field.

[0243] In some examples, the set of thresholds for sending a request for additional system information includes a first threshold associated with the bandwidth capability of the UE, a second threshold associated with the number of antennas of the UE, a third threshold associated with the signal quality of a signal received at the UE, a fourth threshold associated with the number of requests for additional system information that the UE can send, or any combination thereof.

[0244] In some examples, the dedicated field includes one or more bit fields. In some examples, a first value of a bit field in the one or more bit fields indicates that additional system information for the reduced capability UE will be received in response to an on-demand request. In some examples, a second value of a bit field in the one or more bit fields indicates that additional system information for the reduced capability UE will not be received in response to an on-demand request.

[0245] In some examples, the additional system information reception manager 735 can be configured to provide or support means for determining a set of additional system information, which can be requested based on information included in a dedicated field or configuration information element. In some examples, the request transmission manager 740 can be configured to provide or support means for transmitting an indication of additional system information included in the additional system information set to the base station, wherein obtaining the additional system information is based on transmitting the indication of the additional system information.

[0246] In some examples, the additional system information parameter manager 750 may be configured to provide or support a unit for determining a set of parameters that a base station may use to send additional system information based on information included in a dedicated field or configuration information element. In some examples, the request transmission manager 740 may be configured to provide or support a unit for sending an indication of one or more parameters included in the parameter set to the base station, wherein obtaining the additional system information is based on sending the indication of the one or more parameters. In some examples, the one or more parameters include MCS, code rate, or both. In some examples, the one or more parameters used to obtain the additional system information are different from at least one parameter used to receive the first system information.

[0247] In some examples, the additional system information period manager 755 can be configured to provide or support a unit for determining a period associated with the additional system information based on information included in a dedicated field or configuration information element, wherein obtaining the additional system information is based on determining the period. In some examples, the period associated with the additional system information is different from the period associated with the first system information.

[0248] In some examples, the first system information includes a first type of SIB (e.g., SIB1), a MIB, an SSB, or any combination thereof. In some examples, the additional system information includes a second type of SIB different from the first type. In some examples, the first system information is received multiplexed with other system information receivable by other UEs. In some examples, the first system information is received via a PBCH associated with a UE with reduced capability, a PDSCH associated with a UE with reduced capability, or both.

[0249] Figure 8 A diagram of a system 800 including a device 805 supporting techniques for adaptively requesting ODSI according to aspects of the present disclosure is shown. The device 805 may be an example of a device 505, a device 605, or a UE 115 as described herein or include components thereof. The device 805 may communicate wirelessly with one or more base stations 105, UE 115, or any combination thereof. The device 805 may include components for two-way voice and data communications, including components for sending and receiving communications, including a communication manager 815, an I / O controller 815, a transceiver 820, an antenna 825, a memory 830, a code 835, and a processor 840. These components may be electronically communicated or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more buses (e.g., a bus 845).

[0250] I / O controller 815 can manage input and output signals for device 805. I / O controller 815 can also manage peripheral devices that are not integrated into device 805. In some cases, I / O controller 815 can represent a physical connection or port to an external peripheral device. In some cases, I / O controller 815 can utilize a computer such as a 805. In some other cases, the I / O controller 815 may represent or interact with a modem, keyboard, mouse, touch screen, or similar device. In some cases, the I / O controller 815 may be implemented as part of a processor, such as the processor 840. In some cases, a user may interact with the device 805 via the I / O controller 815 or via hardware components controlled by the I / O controller 815.

[0251] In some cases, the device 805 may include a single antenna 825. However, in some other cases, the device 805 may have more than one antenna 825, which may be able to send or receive multiple wireless transmissions concurrently. The transceiver 820 may communicate bidirectionally via one or more antennas 825, wired or wireless links as described herein. For example, the transceiver 820 may represent a wireless transceiver and may communicate bidirectionally with another wireless transceiver. The transceiver 820 may also include a modem for modulating packets and providing the modulated packets to one or more antennas 825 for transmission, and demodulating packets received from one or more antennas 825. The transceiver 820 or the transceiver 820 and one or more antennas 825 may be examples of transmitters 415, transmitters 515, receivers 410, receivers 510, or any combination thereof or components thereof as described herein.

[0252] The memory 830 may include random access memory (RAM) and read-only memory (ROM). The memory 830 may store computer-readable, computer-executable code 835, which includes instructions that, when executed by the processor 840, cause the device 805 to perform various functions described herein. The code 835 may be stored in a non-temporary computer-readable medium (such as system memory or other types of memory). In some cases, the code 835 may not be directly executable by the processor 840, but may cause the computer (e.g., when compiled and executed) to perform the functions described herein. In some cases, the memory 830 may also include a basic I / O system (BIOS), etc., which may control basic hardware or software operations, such as interaction with peripheral components or devices.

[0253] The processor 840 may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof). In some cases, the processor 840 may be configured to operate a memory array using a memory controller. In some other cases, the memory controller may be integrated into the processor 840. The processor 840 may be configured to execute computer-readable instructions stored in a memory (e.g., a memory 830) so that the device 805 performs various functions (e.g., functions or tasks that support techniques for adaptively requesting ODSI). For example, the device 805 or a component of the device 805 may include a processor 840 and a memory 830 coupled to the processor 840, and the processor 840 and the memory 830 are configured to perform various functions described herein.

[0254] According to an example as disclosed herein, the communication manager 810 may support wireless communication at a UE. For example, the communication manager 810 may be configured to provide or support a unit for receiving first system information from a base station, the first system information being for a reduced capability UE including a UE having a bandwidth capability below a threshold, the UE being a reduced capability UE. The communication manager 810 may be configured to provide or support a unit for evaluating the first system information for a dedicated field, the dedicated field including an indicator that additional system information for the reduced capability UE will be received in response to an on-demand request. The communication manager 810 may be configured to provide or support a unit for the following operations: when a dedicated field is included in the first system information, obtaining additional system information for the reduced capability UE according to information included in the dedicated field, or when a dedicated field is missing in the first system information, obtaining additional system information for the reduced capability UE according to information included in a configuration information element of the first system information.

[0255] By including or configuring the communication manager 810 according to the examples as described herein, the device 805 can support improved techniques for on-demand broadcasting of system information for reduced-capability UEs 115, which can reduce signaling overhead and result in more efficient use of resources within the wireless communication system. Specifically, the techniques described herein can enable the reduced-capability UE 115 to determine whether additional system information is available for reception in response to an on-demand request based on information included in the first system information, thereby enabling the base station 105 to broadcast additional system information for the reduced-capability UE 115 as needed, which can reduce signaling overhead and prevent waste of resources when there are few (or no) reduced-capability UEs 115 to receive additional system information.

[0256] Based on obtaining additional system information for a UE 115 with reduced capabilities according to the information included in the first system information, a processor of the UE 115 (e.g., a processor of the control 820, the communication manager 810, the transceiver 820, etc.) can reduce processing resources used to obtain additional system information. For example, by enabling the UE 115 to efficiently determine whether the additional system information is available in response to an on-demand request (and / or without a request), the techniques described herein can reduce the duration that the UE 115 spends on monitoring the additional system information, which can reduce power consumption and signaling associated with monitoring the additional system information. By reducing power consumption, the battery life of the UE 115 can be improved. In addition, reducing the duration that the UE 115 spends on monitoring the additional system information can result in faster and more efficient acquisition of the additional system information, thereby improving the user experience.

[0257] In some examples, the communication manager 810 can be configured to perform various operations (e.g., receive, monitor, transmit) using or in cooperation with the transceiver 820, one or more antennas 825, or any combination thereof. Although the communication manager 810 is shown as a separate component, in some examples, one or more functions described with reference to the communication manager 810 can be supported or performed by the processor 840, the memory 830, the code 835, or any combination thereof. For example, the code 835 may include instructions executable by the processor 840 to cause the device 805 to perform various aspects of the technology for adaptively requesting ODSI as described herein, or the processor 840 and the memory 830 may be otherwise configured to perform or support such operations.

[0258] Fig. 9 A block diagram 900 of a device 905 supporting techniques for adaptively requesting ODSI according to aspects of the present disclosure is shown. The device 905 may be an example of aspects of a base station 105 as described herein. The device 905 may include a receiver 910, a transmitter 915, and a communication manager 920. The device 905 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0259] The receiver 910 may provide a unit for receiving information (such as packets, user data, control information, or any combination thereof) associated with various information channels (e.g., control channels, data channels, information channels related to techniques for adaptively requesting ODSI). The information may be communicated to other components of the device 905. The receiver 910 may utilize a single antenna or a collection of multiple antennas.

[0260] The transmitter 915 may provide a means for transmitting signals generated by other components of the device 905. For example, the transmitter 915 may transmit information (such as packets, user data, control information, or any combination thereof) associated with various information channels (e.g., control channels related to size-based neural network selection for autoencoder-based communications, data channels, information channels). In some examples, the transmitter 915 may be co-located with the receiver 910 in a transceiver module. The transmitter 915 may utilize a single antenna or a collection of multiple antennas.

[0261] The communication manager 920, the receiver 910, the transmitter 915, or various combinations thereof, or various components thereof may be examples of means for performing various aspects of the techniques for adaptively requesting ODSI described herein.

[0262] In some examples, the communication manager 920, the receiver 910, the transmitter 915, or various combinations or components thereof may be implemented in hardware (e.g., in a communication management circuit). The circuit may include a processor, a DSP, an ASIC, an FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described in the present disclosure.

[0263] Additionally or alternatively, in some examples, the communication manager 920, the receiver 910, the transmitter 915, or various combinations or components thereof may be implemented in code executed by a processor (e.g., as communication management software or firmware). If implemented in code executed by a processor, the functionality of the communication manager 920, the receiver 910, the transmitter 915, or various combinations or components thereof may be performed by a general purpose processor, a DSP, a CPU, an ASIC, an FPGA, or any combination of these or other programmable logic devices.

[0264] In some examples, the communication manager 920 can be configured to perform various operations (e.g., receive, monitor, transmit) using or otherwise cooperating with the receiver 910, the transmitter 915, or both. For example, the communication manager 920 can receive information from the receiver 910, send information to the transmitter 915, or be integrated in conjunction with the receiver 910, the transmitter 915, or both to receive information, send information, or perform various other operations as described herein.

[0265] According to an example as disclosed herein, the communication manager 920 may support wireless communication at a base station. For example, the communication manager 920 may be configured to provide or support a unit for sending first system information to a UE, the first system information being for a reduced capability UE including a UE having a bandwidth capability below a threshold, the UE being a reduced capability UE. The communication manager 920 may be configured to provide or support a unit for evaluating the first system information for a dedicated field, the dedicated field including an indicator that additional system information for the reduced capability UE will be sent in response to an on-demand request. The communication manager 920 may be configured to provide or support a unit for the following operations: when the dedicated field is included in the first system information, the additional system information for the reduced capability UE is sent according to the information included in the dedicated field, or when the dedicated field is missing in the first system information, the additional system information for the reduced capability UE is sent according to the information included in the configuration information element of the first system information.

[0266] By including or configuring the communication manager 920 according to examples as described herein, the device 905 (e.g., a processor controlling or otherwise coupled to the receiver 910, the transmitter 915, the communication manager 920, or a combination thereof) can support techniques for on-demand broadcasting of system information for reduced-capability UEs 115, which can reduce signaling overhead and result in more efficient use of resources within the wireless communication system. Specifically, the techniques described herein can enable the base station 105 to send additional system information for the reduced-capability UE 115 as needed (e.g., in response to an on-demand request), which can reduce signaling overhead and prevent waste of resources when there are few (or no) reduced-capability UEs 115 to receive the additional system information.

[0267] Based on sending the additional system information for the reduced capability UE 115 as needed, a processor of the base station (e.g., a processor controlling the receiver 910, the communication manager 920, the transmitter 915, etc.) can reduce processing resources used to obtain the additional system information. For example, by enabling the base station 105 to indicate to the UE 115 whether the additional system information is available to be received in response to an on-demand request, the techniques described herein can enable the base station 105 to send the additional system information for the reduced capability UE 115 as needed, which can reduce power consumption and signaling at the base station 105 associated with continuously or periodically broadcasting the additional system information.

[0268] Fig.10 A block diagram 1000 of a device 1005 supporting techniques for adaptively requesting ODSI according to aspects of the present disclosure is shown. The device 1005 may be an example of aspects of the device 905 or base station 105 as described herein. The device 1005 may include a receiver 1010, a transmitter 1015, and a communication manager 1020. The device 1005 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0269] The receiver 1010 may provide a means for receiving information (such as packets, user data, control information, or any combination thereof) associated with various information channels (e.g., control channels, data channels, information channels related to techniques for adaptively requesting ODSI). The information may be communicated to other components of the device 1005. The receiver 1010 may utilize a single antenna or a collection of multiple antennas.

[0270] The transmitter 1015 may provide a means for transmitting signals generated by other components of the device 1005. For example, the transmitter 1015 may transmit information (such as packets, user data, control information, or any combination thereof) associated with various information channels (e.g., control channels related to size-based neural network selection for autoencoder-based communications, data channels, information channels). In some examples, the transmitter 1015 may be co-located with the receiver 1010 in a transceiver module. The transmitter 1015 may utilize a single antenna or a collection of multiple antennas.

[0271] The device 1005 or its various components may be examples of units for performing various aspects of the technology for adaptively requesting ODSI as described herein. For example, the communication manager 1020 may include a first system information transmission manager 1025, a dedicated field manager 1030, an additional system information transmission manager 1035, or any combination thereof. The communication manager 1020 may be an example of various aspects of the communication manager 920 as described herein. In some examples, the communication manager 1020 or its various components may be configured to perform various operations (e.g., receive, monitor, send) using the receiver 1010, the transmitter 1015, or both or in other ways in cooperation with the receiver 1010, the transmitter 1015, or both. For example, the communication manager 1020 may receive information from the receiver 1010, send information to the transmitter 1015, or be integrated with the receiver 1010, the transmitter 1015, or both to receive information, send information, or perform various other operations as described herein.

[0272] According to an example as disclosed herein, the communication manager 1020 may support wireless communication at a base station. A first system information sending manager 1025 may be configured to provide or support a unit for sending first system information to a UE, the first system information being for a reduced capability UE including a UE having a bandwidth capability below a threshold, the UE being a reduced capability UE. A dedicated field manager 1030 may be configured to provide or support a unit for evaluating the first system information for a dedicated field, the dedicated field including an indicator that additional system information for the reduced capability UE will be sent in response to an on-demand request. An additional system information sending manager 1035 may be configured to provide or support a unit for the following operations: when a dedicated field is included in the first system information, sending additional system information for the reduced capability UE according to information included in the dedicated field, or when a dedicated field is missing in the first system information, sending additional system information for the reduced capability UE according to information included in a configuration information element of the first system information.

[0273] Fig.11A block diagram 1100 of a communication manager 1120 supporting techniques for adaptively requesting ODSI according to various aspects of the present disclosure is shown. The communication manager 1120 may be an example of aspects of the communication manager 920, the communication manager 1120, or both as described herein. The communication manager 1120 or its various components may be examples of units for performing various aspects of the techniques for adaptively requesting ODSI as described herein. For example, the communication manager 1120 may include a first system information transmission manager 1125, a dedicated field manager 1130, an additional system information transmission manager 1135, a request reception manager 1140, a system information request mode manager 1145, an additional system system information cycle manager 1150, or any combination thereof. Each of these components may communicate with each other directly or indirectly (e.g., via one or more buses).

[0274] According to an example as disclosed herein, the communication manager 1120 may support wireless communication at a base station. A first system information sending manager 1125 may be configured to provide or support a unit for sending first system information to a UE, the first system information being for a reduced capability UE including a UE having a bandwidth capability below a threshold, the UE being a reduced capability UE. A dedicated field manager 1130 may be configured to provide or support a unit for evaluating the first system information for a dedicated field, the dedicated field including an indicator that additional system information for the reduced capability UE will be sent in response to an on-demand request. An additional system information sending manager 1135 may be configured to provide or support a unit for the following operations: when a dedicated field is included in the first system information, additional system information for the reduced capability UE is sent according to information included in the dedicated field, or when a dedicated field is missing in the first system information, additional system information for the reduced capability UE is sent according to information included in a configuration information element of the first system information.

[0275] In some examples, to support sending additional system information for reduced capability UEs, additional system information sending manager 1135 can be configured to provide or support means for determining that additional system information is to be sent in response to an on-demand request based on information included in a dedicated field or configuration information element. In some examples, to support sending additional system information for reduced capability UEs, request receiving manager 1140 can be configured to provide or support means for receiving a request for additional system information from a UE based on information included in a dedicated field or configuration information element.

[0276] In some examples, to support sending additional system information for reduced capability UEs, the system information request mode manager 1145 can be configured to provide or support means for identifying a system information request mode based on information included in a dedicated field or configuration information element. In some examples, to support sending additional system information for reduced capability UEs, the request reception manager 1140 can be configured to provide or support means for receiving a request for additional system information from a UE via a resource set associated with a physical random access channel or a sounding reference signal according to the system information request mode.

[0277] In some examples, to support sending additional system information for reduced capability UEs, the system information request mode manager 1145 can be configured to provide or support means for identifying a system information request mode based on information included in a dedicated field or configuration information element. In some examples, to support sending additional system information for reduced capability UEs, the request reception manager 1140 can be configured to provide or support means for receiving a request for additional system information from a UE via a resource set associated with a physical uplink shared channel or a physical uplink control channel according to the system information request mode.

[0278] In some examples, to support sending additional system information for reduced capability UEs, the system information request mode manager 1145 can be configured to provide or support means for identifying a system information request mode based on information included in a dedicated field or configuration information element. In some examples, to support sending additional system information for reduced capability UEs, the request reception manager 1140 can be configured to provide or support means for receiving a request for additional system information from a UE via a resource set associated with a physical random access channel, a sounding reference signal, a physical uplink shared channel, or a physical uplink control channel according to the system information request mode.

[0279] In some examples, to support sending additional system information for reduced capability UEs, system information request mode manager 1145 can be configured to provide or support means for identifying a system information request mode based on information included in a dedicated field or configuration information element. In some examples, to support sending additional system information for reduced capability UEs, request reception manager 1140 can be configured to provide or support means for sending additional system information from a base station according to the system information request mode without receiving a request for additional system information.

[0280] In some examples, the additional system information sending manager 1135 can be configured to provide or support a unit for determining a threshold set for sending a request for additional system information based on information included in a dedicated field or configuration information element. In some examples, the request receiving manager 1140 can be configured to provide or support a unit for receiving a request for additional system information from a UE based on the UE satisfying at least one threshold in the threshold set.

[0281] In some examples, the dedicated field includes one or more bit fields. In some examples, determining the threshold set is based on one or more values ​​of the one or more bit fields of the dedicated field.

[0282] In some examples, the set of thresholds for sending a request for additional system information includes a first threshold associated with the bandwidth capability of the UE, a second threshold associated with the number of antennas of the UE, a third threshold associated with the signal quality of a signal received at the UE, a fourth threshold associated with the number of requests for additional system information that the UE can send, or any combination thereof.

[0283] In some examples, the dedicated field includes one or more bit fields. In some examples, a first value of a bit field in the one or more bit fields indicates that additional system information for the reduced capability UE will be received in response to an on-demand request. In some examples, a second value of a bit field in the one or more bit fields indicates that additional system information for the reduced capability UE will not be received in response to an on-demand request.

[0284] In some examples, the additional system information sending manager 1135 can be configured to provide or support means for determining a set of additional system information, which can be requested based on information included in a dedicated field or configuration information element. In some examples, the request receiving manager 1140 can be configured to provide or support means for receiving an indication of additional system information included in the additional system information set from the UE, wherein sending the additional system information is based on receiving the indication of the additional system information.

[0285] In some examples, the additional system information sending manager 1135 can be configured to provide or support means for determining a set of parameters that the base station can use to send the additional system information based on information included in a dedicated field or configuration information element. In some examples, the request receiving manager 1140 can be configured to provide or support means for receiving an indication of one or more parameters included in the parameter set from the UE, wherein sending the additional system information is based on receiving the indication of the one or more parameters.

[0286] In some examples, the one or more parameters include MCS, code rate, or both. In some examples, the one or more parameters used to send the additional system information are different from at least one parameter used to send the first system information.

[0287] In some examples, the additional system information period manager 1150 can be configured to provide or support a unit for determining a period associated with the additional system information based on information included in a dedicated field or configuration information element, wherein sending the additional system information is based on the determined period. In some examples, the period associated with the additional system information is different from the period associated with the first system information.

[0288] In some examples, the first system information includes a first type of SIB (e.g., SIB1), MIB, SSB, or any combination thereof. In some examples, the additional system information includes a second type of SIB (e.g., SIB2, SIB3) different from the first type. In some examples, the first system information is sent multiplexed with other system information that can be received by other UEs.

[0289] In some examples, the first system information is sent via a PBCH associated with the reduced capability UE, a PDSCH associated with the reduced capability UE, or both.

[0290] Fig.12 A diagram of a system 1200 including a device 1205 supporting techniques for adaptively requesting ODSI according to aspects of the present disclosure is shown. The device 1205 may be an example of a device 905, a device 1005, or a base station 105 as described herein or include components thereof. The device 1205 may wirelessly communicate with one or more base stations 105, UEs 125, or any combination thereof. The device 1205 may include components for two-way voice and data communications, including components for sending and receiving communications, such as a communication manager 1210, a network communication manager 1215, a transceiver 1220, an antenna 1225, a memory 1230, a code 1265, a processor 1240, and an inter-station communication manager 1245. These components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more buses (e.g., a bus 1250).

[0291] The network communications manager 1215 may manage communications with the core network (eg, via one or more wired backhaul links). For example, the network communications manager 1215 may manage the transmission of data communications for client devices (eg, one or more UEs 115).

[0292] In some cases, the device 1205 may include a single antenna 1225. However, in some other cases, the device 1205 may have more than one antenna 1225, which may be able to send or receive multiple wireless transmissions concurrently. The transceiver 1220 may communicate bidirectionally via one or more antennas 1225, wired or wireless links as described herein. For example, the transceiver 1220 may represent a wireless transceiver and may communicate bidirectionally with another wireless transceiver. The transceiver 1220 may also include a modem for modulating packets and providing the modulated packets to one or more antennas 1225 for transmission, and demodulating packets received from one or more antennas 1225. The transceiver 1220 or the transceiver 1220 and one or more antennas 1225 may be examples of transmitters 915, transmitters 1015, receivers 910, receivers 1010, or any combination thereof or components thereof as described herein.

[0293] Memory 1230 may include RAM and ROM. Memory 1230 may store computer-readable, computer-executable code 1235, which includes instructions that, when executed by processor 1240, cause device 1205 to perform various functions described herein. Code 1235 may be stored in a non-transitory computer-readable medium (such as system memory or other types of memory). In some cases, code 1235 may not be directly executable by processor 1240, but may cause a computer (e.g., when compiled and executed) to perform the functions described herein. In some cases, memory 1230 may also include BIOS, which may control basic hardware or software operations, such as interaction with peripheral components or devices.

[0294] Processor 1240 may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof). In some cases, processor 1240 may be configured to operate a memory array using a memory controller. In some other cases, the memory controller may be integrated into processor 1240. Processor 1240 may be configured to execute computer-readable instructions stored in a memory (e.g., memory 1230) so that device 1205 performs various functions (e.g., functions or tasks that support techniques for adaptively requesting ODSI). For example, device 1205 or a component of device 1205 may include a processor 1240 and a memory 1230 coupled to processor 1240, and processor 1240 and memory 1230 are configured to perform various functions described herein.

[0295] The inter-site communication manager 1245 can manage communications with other base stations 105 and can include a controller or scheduler for controlling communications with UE 115 in cooperation with other base stations 105. For example, the inter-site communication manager 1245 can coordinate the scheduling of transmissions to UE 115 to implement various interference mitigation techniques such as beamforming or joint transmission. In some examples, the inter-site communication manager 1245 can provide an X2 interface within an LTE / LTE-A wireless communication network technology to provide communications between base stations 105.

[0296] According to an example as disclosed herein, the communication manager 1210 may support wireless communication at a base station. For example, the communication manager 1210 may be configured to provide or support a unit for sending first system information to a UE, the first system information being for a reduced capability UE including a UE having a bandwidth capability below a threshold, the UE being a reduced capability UE. The communication manager 1210 may be configured to provide or support a unit for evaluating the first system information for a dedicated field, the dedicated field including an indicator that additional system information for the reduced capability UE will be sent in response to an on-demand request. The communication manager 1210 may be configured to provide or support a unit for the following operations: when the dedicated field is included in the first system information, the additional system information for the reduced capability UE is sent according to the information included in the dedicated field, or when the dedicated field is missing in the first system information, the additional system information for the reduced capability UE is sent according to the information included in the configuration information element of the first system information.

[0297] By including or configuring the communication manager 1210 according to the examples as described herein, the device 1205 can support techniques for on-demand broadcasting of system information for reduced-capability UEs 115, which can reduce signaling overhead and result in more efficient use of resources within the wireless communication system. Specifically, the techniques described herein can enable the base station 105 to send additional system information for reduced-capability UEs 115 as needed (e.g., in response to an on-demand request), which can reduce signaling overhead and prevent waste of resources when there are few (or no) reduced-capability UEs 115 to receive the additional system information. In addition, by enabling the base station 105 to indicate to the UE 115 whether the additional system information is receivable in response to an on-demand request, the techniques described herein can enable the base station 105 to send additional system information for reduced-capability UEs 115 as needed, which can reduce power consumption and signaling at the base station 105 associated with continuously or periodically broadcasting the additional system information.

[0298] In some examples, the communication manager 1210 can be configured to perform various operations (e.g., receive, monitor, transmit) using or in cooperation with the transceiver 1220, one or more antennas 1225, or any combination thereof. Although the communication manager 1210 is shown as a separate component, in some examples, one or more functions described with reference to the communication manager 1210 can be supported or performed by the processor 1240, the memory 1230, the code 1235, or any combination thereof. For example, the code 1235 may include instructions executable by the processor 1240 to cause the device 1205 to perform various aspects of the techniques for adaptively requesting ODSI as described herein, or the processor 1240 and the memory 1230 may be otherwise configured to perform or support such operations.

[0299] Fig.13 A flow chart illustrating a method 1300 for supporting techniques for adaptively requesting ODSI according to aspects of the present disclosure is shown. The operations of the method 1200 may be implemented by a UE or a component thereof as described herein. For example, the operations of the method 1300 may be implemented by a UE or a component thereof as described with reference to Figures 1 to 8 The described functions may be performed by the UE 115. In some examples, the UE may execute a set of instructions to control the functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the described functions.

[0300] At 1305, the method may include: receiving first system information from a base station, the first system information being for a reduced-capability UE including a UE having a bandwidth capability below a threshold, the UE being a reduced-capability UE. The operations of 1305 may be performed according to methods as described herein. In some examples, aspects of the operations of 1305 may be performed by a first system information reception manager 725 as described in reference 7.

[0301] At 1310, the method may include evaluating the first system information for a dedicated field, the dedicated field including an indicator that additional system information for a reduced capability UE will be received in response to an on-demand request. The operations of 1310 may be performed according to methods as described herein. In some examples, aspects of the operations of 1310 may be performed by a dedicated field manager 730 as described in reference 7.

[0302] At 1315, the method may include obtaining additional system information for the reduced capability UE according to information included in the dedicated field when the dedicated field is included in the first system information, or obtaining additional system information for the reduced capability UE according to information included in a configuration information element of the first system information when the dedicated field is missing in the first system information. The operations of 1315 may be performed according to methods as described herein. In some examples, aspects of the operations of 1315 may be performed by an additional system information reception manager 735 as described in reference 7.

[0303] Fig.14 A flowchart illustrating a method 1400 for supporting techniques for adaptively requesting ODSI according to aspects of the present disclosure is shown. The operations of the method 1400 may be implemented by a UE or a component thereof as described herein, for example, the operations of the method 1400 may be implemented by a UE or a component thereof as described herein. Figures 1 to 8 The described functions may be performed by the UE 115. In some examples, the UE may execute a set of instructions to control the functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the described functions.

[0304] At 1405, the method may include: receiving first system information from a base station, the first system information being for a reduced-capability UE including a UE having a bandwidth capability below a threshold, the UE being a reduced-capability UE. The operations of 1405 may be performed according to methods as described herein. In some examples, aspects of the operations of 1405 may be performed by a first system information reception manager 725 as described in reference 7.

[0305] At 1410, the method may include evaluating the first system information for a dedicated field, the dedicated field including an indicator that additional system information for a reduced capability UE will be received in response to an on-demand request. The operations of 1410 may be performed according to methods as described herein. In some examples, aspects of the operations of 1410 may be performed by a dedicated field manager 730 as described in reference 7.

[0306] At 1415, the method may include determining that additional system information is to be received in response to an on-demand request based on information included in a dedicated field or a configuration information element of the first system information. The operations of 1415 may be performed according to methods as described herein. In some examples, aspects of the operations of 1415 may be performed by an additional system information reception manager 735 as described in reference 7.

[0307] At 1420, the method may include sending a request for additional system information to the base station according to information included in a dedicated field or configuration information element. The operations of 1420 may be performed according to methods as described herein. In some examples, aspects of the operations of 1420 may be performed by a request sending manager 740 as described in reference 7.

[0308] At 1425, the method may include: when a dedicated field is included in the first system information, obtaining additional system information for the reduced capability UE according to information included in the dedicated field, or when the dedicated field is missing in the first system information, obtaining additional system information for the reduced capability UE according to information included in a configuration information element of the first system information, wherein the additional system information is obtained based on a send request. The operations of 1425 may be performed according to methods as described herein. In some examples, aspects of the operations of 1425 may be performed by an additional system information reception manager 735 as described in reference 7.

[0309] Fig.15 A flow chart illustrating a method 1400 for supporting techniques for adaptively requesting ODSI according to aspects of the present disclosure is shown. The operations of the method 1500 may be implemented by a UE or a component thereof as described herein, for example, the operations of the method 1500 may be implemented by a UE or a component thereof as described herein. Figures 1 to 8 The described functions may be performed by the UE 115. In some examples, the UE may execute a set of instructions to control the functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the described functions.

[0310] At 1505, the method may include: receiving first system information from a base station, the first system information being for a reduced-capability UE including a UE having a bandwidth capability below a threshold, the UE being a reduced-capability UE. The operations of 1505 may be performed according to methods as described herein. In some examples, aspects of the operations of 1505 may be performed by a first system information reception manager 725 as described in reference 7.

[0311] At 1510, the method may include evaluating the first system information for a dedicated field, the dedicated field including an indicator that additional system information for a reduced capability UE will be received in response to an on-demand request. The operations of 1510 may be performed according to methods as described herein. In some examples, aspects of the operations of 1510 may be performed by a dedicated field manager 730 as described with reference to 7.

[0312] At 1515, the method may include: identifying a system information request mode based on information included in a dedicated field or a configuration information element of the first system information. The operation of 1515 may be performed according to a method as described herein. In some examples, aspects of the operation of 1515 may be performed by a system information request mode manager 745 as described in reference 7.

[0313] At 1520, the method may include: sending a request for additional system information to a base station via a resource set associated with a physical random access channel, a sounding reference signal, a physical uplink shared channel, or a physical uplink control channel according to a system information request mode. The operations of 1520 may be performed according to methods as described herein. In some examples, aspects of the operations of 1520 may be performed by a request sending manager 740 as described in reference 7.

[0314] At 1525, the method may include: when a dedicated field is included in the first system information, obtaining additional system information for the reduced capability UE according to information included in the dedicated field, or when the dedicated field is missing in the first system information, obtaining additional system information for the reduced capability UE according to information included in a configuration information element of the first system information, wherein the additional system information is obtained based on a send request. The operations of 1525 may be performed according to methods as described herein. In some examples, aspects of the operations of 1525 may be performed by an additional system information reception manager 735 as described in reference 7.

[0315] Fig.16 A flowchart illustrating a method 1600 for supporting techniques for adaptively requesting ODSI according to aspects of the present disclosure is shown. The operations of the method 1600 may be implemented by a base station or components thereof as described herein, for example, the operations of the method 1600 may be implemented by a base station or components thereof as described herein. Figures 1 to 3 9 to 12 are performed by the base station 105 described. In some examples, the base station can execute an instruction set to control the functional elements of the base station to perform the described functions. In addition or alternatively, the base station can use dedicated hardware to perform various aspects of the described functions.

[0316] At 1605, the method may include: sending first system information to the UE, the first system information being for a reduced-capability UE including a UE having a bandwidth capability below a threshold, the UE being a reduced-capability UE. The operations of 1605 may be performed according to methods as described herein. In some examples, aspects of the operations of 1605 may be performed by a first system information sending manager 1125 as described in reference 11.

[0317] At 1610, the method may include evaluating the first system information for a dedicated field, the dedicated field including an indicator that additional system information for a reduced capability UE will be sent in response to an on-demand request. The operations of 1610 may be performed according to methods as described herein. In some examples, aspects of the operations of 1610 may be performed by a dedicated field manager 1130 as described in reference 11.

[0318] At 1615, the method may include: when a dedicated field is included in the first system information, sending additional system information for the reduced capability UE according to information included in the dedicated field, or when the dedicated field is missing in the first system information, sending additional system information for the reduced capability UE according to information included in a configuration information element of the first system information. The operations of 1615 may be performed according to methods as described herein. In some examples, aspects of the operations of 1615 may be performed by an additional system information sending manager 1135 as described in reference 11.

[0319] It should be noted that the methods described herein describe possible implementations, and that operations and steps may be rearranged or otherwise modified, and other implementations are possible. Furthermore, aspects from two or more methods may be combined.

[0320] The following provides a summary of various aspects of the disclosure:

[0321] Aspect 1: A method for wireless communication at a UE, comprising: receiving first system information from a base station, the first system information being for a reduced capability UE including a UE having a bandwidth capability below a threshold, the UE being a reduced capability UE; evaluating the first system information for a dedicated field, the dedicated field including an indicator that additional system information for the reduced capability UE will be received in response to an on-demand request; and obtaining the additional system information for the reduced capability UE according to information included in the dedicated field when the dedicated field is included in the first system information, or obtaining the additional system information for the reduced capability UE according to information included in a configuration information element of the first system information when the dedicated field is missing.

[0322] Aspect 2: A method according to Aspect 1, wherein obtaining the additional system information for the UE with reduced capability includes: determining that the additional system information will be received in response to an on-demand request based at least in part on the information included in the dedicated field or the configuration information element; and sending a request for the additional system information to the base station based on the information included in the dedicated field or the configuration information element.

[0323] Aspect 3: A method according to any one of Aspects 1 to 2, wherein obtaining the additional system information for the UE with reduced capability includes: identifying a system information request mode based on the information included in the dedicated field or the configuration information element; and sending a request for the additional system information to the base station via a resource set associated with PRACH, SRS, PUSCH, or PUCCH based on the system information request mode.

[0324] Aspect 4: A method according to any one of Aspects 1 to 3, wherein obtaining the additional system information for the UE with reduced capability includes: identifying a system information request mode based on the information included in the dedicated field or the configuration information element; and obtaining the additional system information from the base station according to the system information request mode without sending a request for the additional system information.

[0325] Aspect 5: The method according to any one of Aspects 1 to 4 further includes: determining a threshold set for sending a request for the additional system information based at least in part on the information included in the dedicated field or the configuration information element; and sending the request for the additional system information to the base station based at least in part on determining that the UE satisfies at least one threshold in the threshold set.

[0326] Aspect 6: The method according to aspect 5, wherein the dedicated field includes one or more bit fields, and determining the threshold set is based at least in part on one or more values ​​of the one or more bit fields of the dedicated field.

[0327] Aspect 7: A method according to any one of Aspects 5 to 6, wherein the threshold set for sending the request for the additional system information includes a first threshold associated with the bandwidth capability of the UE, a second threshold associated with the number of antennas of the UE, a third threshold associated with the signal quality of the signal received at the UE, a fourth threshold associated with the number of requests for the additional system information that the UE can send, or any combination thereof.

[0328] Aspect 8: A method according to any one of Aspects 1 to 7, wherein the first system information is received via a first downlink BWP associated with a UE with reduced capability, and the method further includes: receiving an indication of a second downlink BWP for obtaining the additional system information via the first system information, wherein the additional system information is obtained via the second downlink BWP, wherein the second downlink BWP is associated with a UE with reduced capability, and wherein the second downlink BWP is the same as the first downlink BWP or different from the first downlink BWP.

[0329] Aspect 9: The method according to any one of Aspects 1 to 8 also includes: sending a request for the additional system information to the base station via an uplink BWP associated with the UE with reduced capability, wherein the uplink BWP is indicated via the first system information.

[0330] Aspect 10: A method according to any one of Aspects 1 to 9, wherein the dedicated field includes one or more bit fields, a first value of a bit field in the one or more bit fields indicates that additional system information for UEs with reduced capabilities will be received in response to an on-demand request, and a second value of the bit field in the one or more bit fields indicates that additional system information for UEs with reduced capabilities will not be received in response to an on-demand request.

[0331] Aspect 11: The method according to any one of Aspects 1 to 10 further includes: determining an additional system information set for a UE with reduced capability, wherein the additional system information set may be requested based at least in part on the information included in the dedicated field or the configuration information element, wherein the additional system information set includes SSB, downlink broadcast reference signal, CORESET, CSS configuration for a random access process, paging and system information update information, or any combination thereof; and sending an indication of the additional system information included in the additional system information set to the base station, wherein obtaining the additional system information is based at least in part on sending the indication of the additional system information.

[0332] Aspect 12: The method according to any one of Aspects 1 to 11 further includes: determining a parameter set that the base station can use to send the additional system information based at least in part on the information included in the dedicated field or the configuration information element; and sending an indication of one or more parameters included in the parameter set to the base station, wherein obtaining the additional system information is based at least in part on sending the indication of the one or more parameters.

[0333] Aspect 13: The method according to aspect 12, wherein the one or more parameters include MCS, code rate, or both.

[0334] Aspect 14: The method according to any one of aspects 12 to 13, wherein the one or more parameters used to obtain the additional system information are different from at least one parameter used to receive the first system information.

[0335] Aspect 15: The method according to any one of Aspects 1 to 14 further includes: determining a period associated with the additional system information based at least in part on the information included in the dedicated field or the configuration information element, wherein obtaining the additional system information is based at least in part on determining the period.

[0336] Aspect 16: A method according to Aspect 15, wherein the period associated with the additional system information is different from the period associated with the first system information, and the period associated with the additional system information is at least partially based on information included in the additional system information, the information including SSB, downlink broadcast reference signal, CORESET, CSS configuration for random access process, paging and system information update information, or any combination thereof.

[0337] Aspect 17: A method according to any one of Aspects 1 to 16, wherein the first system information includes a first type of SIB, a first type of MIB (MIB) or a combination thereof, and the method further includes: receiving, via the first system information, an indication of: one or more downlink BWP configurations associated with a UE with reduced capability for receiving the first system information, one or more uplink BWP configurations associated with a UE with reduced capability for sending a request for the additional system information, one or more additional downlink BWP configurations associated with a UE with reduced capability for receiving the additional system information, or any combination thereof.

[0338] Aspect 18: The method according to aspect 17, wherein the additional system information includes a second type of SIB different from the first type, a second type of MIB, or a combination thereof.

[0339] Aspect 19: The method according to any one of aspects 1 to 18, wherein the first system information is received multiplexed with other system information receivable by other UEs.

[0340] Aspect 20: The method according to any one of aspects 1 to 19, wherein the first system information is received via a PBCH associated with a reduced capability UE, a PDSCH associated with a reduced capability UE, or both.

[0341] Aspect 21: A method for wireless communication at a base station, comprising: sending first system information to a UE, the first system information being for a reduced capability UE including a UE having a bandwidth capability below a threshold, the UE being a reduced capability UE; evaluating the first system information for a dedicated field, the dedicated field including an indicator that additional system information for the reduced capability UE will be sent in response to an on-demand request; and when the dedicated field is included in the first system information, sending the additional system information for the reduced capability UE according to the information included in the dedicated field, or when the dedicated field is missing in the first system information, sending the additional system information for the reduced capability UE according to the information included in the configuration information element of the first system information.

[0342] Aspect 22: A method according to Aspect 21, wherein sending the additional system information for the UE with reduced capability includes: determining that the additional system information will be sent in response to an on-demand request based at least in part on the information included in the dedicated field or the configuration information element; and receiving a request for the additional system information from the UE based on the information included in the dedicated field or the configuration information element.

[0343] Aspect 23: A method according to any one of Aspects 21 to 22, wherein sending the additional system information for a UE with reduced capability includes: identifying a system information request mode based on the information included in the dedicated field or the configuration information element; and receiving a request for the additional system information from the UE via a resource set associated with PRACH, SRS, PUSCH, or PUCCH based on the system information request mode.

[0344] Aspect 24: A method according to any one of Aspects 21 to 23, wherein sending the additional system information for the UE with reduced capability includes: identifying a system information request mode based on the information included in the dedicated field or the configuration information element; and sending the additional system information from the base station according to the system information request mode without receiving a request for the additional system information.

[0345] Aspect 25: The method according to any one of Aspects 21 to 24 further includes: determining a threshold set for sending a request for the additional system information based at least in part on the information included in the dedicated field or the configuration information element; and receiving the request for the additional system information from the UE based at least in part on the UE satisfying at least one threshold in the threshold set, wherein the threshold set includes a first threshold associated with the bandwidth capability of the UE, a second threshold associated with the number of antennas of the UE, a third threshold associated with the signal quality of the signal received at the UE, a fourth threshold associated with the number of requests for the additional system information that the UE can send, or any combination thereof.

[0346] Aspect 26: The method according to any one of aspects 21 to 25, wherein the first system information, the additional system information, or both are received via a downlink BWP associated with a reduced capability UE.

[0347] Aspect 27: The method according to any one of aspects 21 to 26, further comprising: receiving a request for the additional system information from the UE via an uplink BWP associated with the reduced capability UE.

[0348] Aspect 28: A method according to any one of Aspects 21 to 27, wherein the dedicated field includes one or more bit fields, a first value of a bit field in the one or more bit fields indicates that additional system information for UEs with reduced capabilities will be received in response to an on-demand request, and a second value of the bit field in the one or more bit fields indicates that additional system information for UEs with reduced capabilities will not be received in response to an on-demand request.

[0349] Aspect 29: A method for wireless communication at a UE, comprising: receiving first system information from a base station, the first system information being for a reduced capability UE including a UE having a bandwidth capability below a threshold, the UE being a reduced capability UE; evaluating the first system information for a dedicated field, the dedicated field including an indicator that additional system information for the reduced capability UE will be received in response to an on-demand request; and obtaining the additional system information for the reduced capability UE according to information included in the dedicated field when the dedicated field is included in the first system information, or obtaining the additional system information for the reduced capability UE according to information included in a configuration information element of the first system information when the dedicated field is missing.

[0350] Aspect 30: A method according to Aspect 29, wherein obtaining the additional system information for the UE with reduced capability includes: determining that the additional system information will be received in response to an on-demand request based at least in part on the information included in the dedicated field or the configuration information element; and sending a request for the additional system information to the base station based on the information included in the dedicated field or the configuration information element.

[0351] Aspect 31: A method according to any one of Aspects 29 to 30, wherein obtaining the additional system information for the UE with reduced capability includes: identifying a system information request mode based on the information included in the dedicated field or the configuration information element; and sending a request for the additional system information to the base station via a resource set associated with PRACH or SRS based on the system information request mode.

[0352] Aspect 32: A method according to any one of Aspects 29 to 31, wherein obtaining the additional system information for the UE with reduced capability includes: identifying a system information request mode based on the information included in the dedicated field or the configuration information element; and sending a request for the additional system information to the base station via a resource set associated with a PUSCH or a PUCCH based on the system information request mode.

[0353] Aspect 33: A method according to any one of Aspects 29 to 32, wherein obtaining the additional system information for the UE with reduced capability includes: identifying a system information request mode based on the information included in the dedicated field or the configuration information element; and sending a request for the additional system information to the base station via a resource set associated with PRACH, SRS, PUSCH, or PUCCH based on the system information request mode.

[0354] Aspect 34: A method according to any one of Aspects 29 to 33, wherein obtaining the additional system information for the UE with reduced capability includes: identifying a system information request mode based on the information included in the dedicated field or the configuration information element; and obtaining the additional system information from the base station according to the system information request mode without sending a request for the additional system information.

[0355] Aspect 35: The method according to any one of Aspects 29 to 34 further includes: determining a threshold set for sending a request for the additional system information based at least in part on the information included in the dedicated field or the configuration information element; and sending the request for the additional system information to the base station based at least in part on determining that the UE satisfies at least one threshold in the threshold set.

[0356] Aspect 36: The method according to aspect 35, wherein the dedicated field includes one or more bit fields, and determining the threshold set is based at least in part on one or more values ​​of the one or more bit fields of the dedicated field.

[0357] Aspect 37: A method according to any one of Aspects 35 to 36, wherein the threshold set for sending the request for the additional system information includes a first threshold associated with the bandwidth capability of the UE, a second threshold associated with the number of antennas of the UE, a third threshold associated with the signal quality of the signal received at the UE, a fourth threshold associated with the number of requests for the additional system information that the UE can send, or any combination thereof.

[0358] Aspect 38: A method according to any one of Aspects 29 to 37, wherein the dedicated field includes one or more bit fields, a first value of a bit field in the one or more bit fields indicates that additional system information for UEs with reduced capabilities will be received in response to an on-demand request, and a second value of the bit field in the one or more bit fields indicates that additional system information for UEs with reduced capabilities will not be received in response to an on-demand request.

[0359] Aspect 39: The method according to any one of Aspects 29 to 38 further includes: determining an additional system information set, which is requested at least in part based on the information included in the dedicated field or the configuration information element; and sending an indication of the additional system information included in the additional system information set to the base station, wherein obtaining the additional system information is based at least in part on sending the indication of the additional system information.

[0360] Aspect 40: The method according to any one of Aspects 29 to 39 further includes: determining a parameter set that the base station can use to send the additional system information based at least in part on the information included in the dedicated field or the configuration information element; and sending an indication of one or more parameters included in the parameter set to the base station, wherein obtaining the additional system information is based at least in part on sending the indication of the one or more parameters.

[0361] Aspect 41: The method according to aspect 40, wherein the one or more parameters include MCS, code rate, or both.

[0362] Aspect 42: The method according to any one of aspects 40 to 41, wherein the one or more parameters used to obtain the additional system information are different from at least one parameter used to receive the first system information.

[0363] Aspect 43: The method according to any one of Aspects 29 to 42 further includes: determining a period associated with the additional system information based at least in part on the information included in the dedicated field or the configuration information element, wherein obtaining the additional system information is based at least in part on determining the period.

[0364] Aspect 44: The method according to aspect 43, wherein the period associated with the additional system information is different from the period associated with the first system information.

[0365] Aspect 45: The method according to any one of aspects 29 to 44, wherein the first system information comprises a first type of SIB, MIB (MIB), or any combination thereof.

[0366] Aspect 46: The method according to Aspect 45, wherein the additional system information comprises a second type of SIB different from the first type.

[0367] Aspect 47: The method according to any one of Aspects 29 to 46, wherein the first system information is received multiplexed with other system information receivable by other UEs.

[0368] Aspect 48: The method according to any one of aspects 29 to 47, wherein the first system information is received via a PBCH associated with a reduced capability UE, a PDSCH associated with a reduced capability UE, or both.

[0369] Aspect 49: A method for wireless communication at a base station, comprising: sending first system information to a UE, the first system information being for a reduced capability UE including a UE having a bandwidth capability below a threshold, the UE being a reduced capability UE; evaluating the first system information for a dedicated field, the dedicated field including an indicator that additional system information for the reduced capability UE will be sent in response to an on-demand request; and when the dedicated field is included in the first system information, sending the additional system information for the reduced capability UE according to the information included in the dedicated field, or when the dedicated field is missing in the first system information, sending the additional system information for the reduced capability UE according to the information included in the configuration information element of the first system information.

[0370] Aspect 50: A method according to Aspect 49, wherein sending the additional system information for the UE with reduced capability includes: determining that the additional system information will be sent in response to an on-demand request based at least in part on the information included in the dedicated field or the configuration information element; and receiving a request for the additional system information from the UE based on the information included in the dedicated field or the configuration information element.

[0371] Aspect 51: A method according to any one of Aspects 49 to 50, wherein sending the additional system information for a UE with reduced capability includes: identifying a system information request mode based on the information included in the dedicated field or the configuration information element; and receiving a request for the additional system information from the UE via a resource set associated with a PRACH or SRS based on the system information request mode.

[0372] Aspect 52: A method according to any one of Aspects 49 to 51, wherein sending the additional system information for a UE with reduced capability includes: identifying a system information request mode based on the information included in the dedicated field or the configuration information element; and receiving a request for the additional system information from the UE via a resource set associated with a PUSCH or a PUCCH based on the system information request mode.

[0373] Aspect 53: A method according to any one of Aspects 49 to 52, wherein sending the additional system information for a UE with reduced capability includes: identifying a system information request mode based on the information included in the dedicated field or the configuration information element; and receiving a request for the additional system information from the UE via a resource set associated with PRACH, SRS, PUSCH, or PUCCH based on the system information request mode.

[0374] Aspect 54: A method according to any one of Aspects 49 to 53, wherein sending the additional system information for the UE with reduced capability includes: identifying a system information request mode based on the information included in the dedicated field or the configuration information element; and sending the additional system information from the base station according to the system information request mode without receiving a request for the additional system information.

[0375] Aspect 55: The method according to any one of Aspects 49 to 54 further includes: determining a threshold set for sending a request for the additional system information based at least in part on the information included in the dedicated field or the configuration information element; and receiving the request for the additional system information from the UE based at least in part on the UE satisfying at least one threshold in the threshold set.

[0376] Aspect 56: The method according to Aspect 55, wherein the dedicated field includes one or more bit fields, and determining the threshold set is based at least in part on one or more values ​​of the one or more bit fields of the dedicated field.

[0377] Aspect 57: A method according to any one of Aspects 55 to 56, wherein the threshold set for sending the request for the additional system information includes a first threshold associated with the bandwidth capability of the UE, a second threshold associated with the number of antennas of the UE, a third threshold associated with the signal quality of the signal received at the UE, a fourth threshold associated with the number of requests for the additional system information that the UE can send, or any combination thereof.

[0378] Aspect 58: A method according to any one of Aspects 49 to 57, wherein the dedicated field includes one or more bit fields, a first value of a bit field in the one or more bit fields indicates that additional system information for UEs with reduced capabilities will be received in response to an on-demand request, and a second value of the bit field in the one or more bit fields indicates that additional system information for UEs with reduced capabilities will not be received in response to an on-demand request.

[0379] Aspect 59: The method according to any one of Aspects 49 to 58 further includes: determining an additional system information set, which may be requested at least in part based on the information included in the dedicated field or the configuration information element; and receiving an indication of the additional system information included in the additional system information set from the UE, wherein sending the additional system information is at least in part based on receiving the indication of the additional system information.

[0380] Aspect 60: The method according to any one of Aspects 49 to 59 further includes: determining a parameter set that the base station can use to send the additional system information based at least in part on the information included in the dedicated field or the configuration information element; and receiving an indication of one or more parameters included in the parameter set from the UE, wherein sending the additional system information is based at least in part on receiving the indication of the one or more parameters.

[0381] Aspect 61: The method according to aspect 60, wherein the one or more parameters include MCS, code rate, or both.

[0382] Aspect 62: The method according to any one of aspects 60 to 61, wherein the one or more parameters used to send the additional system information are different from at least one parameter used to send the first system information.

[0383] Aspect 63: The method according to any one of Aspects 49 to 62 further includes: determining a period associated with the additional system information based at least in part on the information included in the dedicated field or the configuration information element, wherein sending the additional system information is based at least in part on determining the period.

[0384] Aspect 64: The method according to Aspect 63, wherein the period associated with the additional system information is different from the period associated with the first system information.

[0385] Aspect 65: A method according to any one of aspects 49 to 64, wherein the first system information comprises a first type of SIB, MIB (MIB), or any combination thereof.

[0386] Aspect 66: The method according to Aspect 65, wherein the additional system information comprises a second type of SIB different from the first type.

[0387] Aspect 67: The method according to any one of aspects 49 to 66, wherein the first system information is sent multiplexed with other system information receivable by other UEs.

[0388] Aspect 68: A method according to any one of aspects 49 to 67, wherein the first system information is sent via a PBCH associated with the reduced capability UE, a PDSCH associated with the reduced capability UE, or both.

[0389] Aspect 69: An apparatus for wireless communication at a UE, 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 a method according to any one of Aspects 1 to 20.

[0390] Aspect 70: An apparatus for wireless communication at a UE, comprising at least one unit for performing the method according to any one of aspects 1 to 20.

[0391] Aspect 71: A non-transitory computer-readable medium storing code for wireless communication at a UE, the code comprising instructions executable by a processor to perform the method according to any one of aspects 1 to 20.

[0392] Aspect 72: An apparatus for wireless communication at a base station, 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 a method according to any one of Aspects 21 to 28.

[0393] Aspect 73: An apparatus for wireless communication at a base station, comprising at least one unit for performing the method according to any one of aspects 21 to 28.

[0394] Aspect 74: A non-transitory computer-readable medium storing code for wireless communication at a base station, the code comprising instructions executable by a processor to perform the method according to any one of aspects 21 to 28.

[0395] Aspect 75: An apparatus for wireless communication at a UE, 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 a method according to any one of Aspects 29 to 48.

[0396] Aspect 76: An apparatus for wireless communication at a UE, comprising at least one unit for performing the method according to any one of aspects 29 to 48.

[0397] Aspect 77: A non-transitory computer-readable medium storing code for wireless communication at a UE, the code comprising instructions executable by a processor to perform the method according to any one of aspects 29 to 48.

[0398] Aspect 78: An apparatus for wireless communication at a base station, 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 a method according to any one of Aspects 49 to 68.

[0399] Aspect 79: An apparatus for wireless communication at a base station, comprising at least one unit for performing a method according to any one of aspects 49 to 68.

[0400] Aspect 80: A non-transitory computer-readable medium storing code for wireless communication at a base station, the code comprising instructions executable by a processor to perform the method according to any one of aspects 49 to 68.

[0401] Although aspects of LTE, LTE-A, LTE-A Pro, or NR systems may be described for purposes of example, and LTE, LTE-A, LTE-A Pro, or NR terminology may be used in much of the description, the techniques described herein are applicable beyond LTE, LTE-A, LTE-A Pro, or NR networks. For example, the described techniques may be applicable to various other wireless communication systems, such as Ultra Mobile Broadband (UMB), Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, and other systems and radio technologies not explicitly mentioned herein.

[0402] The information and signals described herein may be represented using any of a variety of different techniques and methods. For example, data, instructions, commands, information, signals, bits, symbols, and chips mentioned throughout the description may be represented by voltage, current, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

[0403] The various illustrative blocks and components described in conjunction with the disclosure herein may be implemented or executed using a general purpose processor, DSP, ASIC, CPU, FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, but in an alternative, the processor may be any processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, a combination of one or more microprocessors and a DSP core, or any other such configuration).

[0404] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or sent through a computer-readable medium as one or more instructions or codes. Other examples and implementations are within the scope of the present disclosure and the appended claims. For example, due to the nature of software, the functions described herein may be implemented using software executed by a processor, hardware, firmware, hard wiring, or a combination of any of these items. Features that implement the functions may also be physically located at various locations, including being distributed so that parts of the functions are implemented at different physical locations.

[0405] Computer-readable medium includes both non-transitory computer storage medium and communication medium, and communication medium includes any medium that promotes the transmission of computer program from one place to another place.Non-transitory storage medium can be any available medium that can be accessed by general-purpose computer or special-purpose computer.By way of example and not limitation, non-transitory computer-readable medium can include RAM, ROM, electrically erasable programmable ROM (EEPROM), flash memory, compact disc (CD) ROM or other optical disc storage, disk storage or other magnetic storage device, or can be used for carrying or storing desired program code unit and any other non-transitory medium that can be accessed by general-purpose or special-purpose computer or general-purpose or special-purpose processor in the form of instruction or data structure.In addition, any connection is appropriately referred to as computer-readable medium.For example, if software is to send from website, server or other remote source using coaxial cable, optical fiber cable, twisted pair, digital subscriber line (DSL) or wireless technology such as infrared, radio and microwave, then coaxial cable, optical fiber cable, twisted pair, DSL or wireless technology such as infrared, radio and microwave are included in the definition of computer-readable medium. As used herein, disk and disc include CD, laser disc, optical disc, digital versatile disc (DVD), floppy disk and Blu-ray disc, wherein disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above are also included within the scope of computer-readable media.

[0406] As used herein (including in the claims), "or" as used in a list of items (e.g., a list of items ending with a phrase such as "at least one of" or "one or more of") indicates an inclusive list, so that, for example, a list of at least one of A, B, or C means A or B or C or AB or AC or BC or ABC (i.e., A and B and C). In addition, as used herein, the phrase "based on" should not be interpreted as a reference to a closed set of conditions. For example, an example step described as "based on condition A" can be based on both condition A and condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase "based on" should be interpreted in the same manner as the phrase "based at least in part on."

[0407] In the accompanying drawings, similar components or features may have the same reference numeral. In addition, various components of the same type may be distinguished by following the reference numeral with a dash and a second reference numeral, the second reference numeral being used to distinguish between similar components. If only the first reference numeral is used in the specification, the description applies to any of the similar components having the same first reference numeral, without regard to the second reference numeral or other subsequent reference numerals.

[0408] Example configurations are described herein in conjunction with the descriptions set forth in the accompanying drawings, and do not represent all examples that may be implemented or within the scope of the claims. The term "example" as used herein means "used as an example, instance, or illustration," rather than "preferred" or "advantageous over other examples." For the purpose of providing an understanding of the described techniques, the detailed description includes specific details. However, these techniques may be practiced without these specific details. In some cases, known structures and devices are shown in block diagram form to avoid obscuring the concepts of the described examples.

[0409] To enable those skilled in the art to implement or use the present disclosure, the description herein is provided. It will be apparent to those skilled in the art that various modifications to the present disclosure will be apparent, and the general principles defined herein may be applied to other variations without departing from the scope of the present disclosure. Therefore, the present disclosure is not limited to the examples and designs described herein, but is given the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for wireless communication at a user equipment (UE), comprising: receiving first system information from a base station, the first system information being for reduced capability UEs including UEs having a bandwidth capability below a threshold, the UEs being reduced capability UEs; evaluating the first system information against a dedicated field, the dedicated field comprising an indicator that additional system information for reduced capability UEs is to be received in response to an on-demand request; as well as When the dedicated field is included in the first system information, the additional system information for the UE with reduced capability is obtained according to the information included in the dedicated field, or when the dedicated field is missing in the first system information, the additional system information for the UE with reduced capability is obtained according to the information included in the configuration information element of the first system information.

2. The method according to claim 1, wherein: Obtaining the additional system information for the reduced capability UE comprises: determining that the additional system information is to be received in response to an on-demand request based at least in part on the information included in the dedicated field or the configuration information element; and A request for the additional system information is sent to the base station according to the information included in the dedicated field or the configuration information element.

3. The method according to claim 1, wherein: Obtaining the additional system information for the reduced capability UE comprises: identifying a system information request mode based on the information included in the dedicated field or the configuration information element; and According to the system information request mode, a request for the additional system information is sent to the base station via a resource set associated with a physical random access channel, a sounding reference signal, a physical uplink shared channel, or a physical uplink control channel.

4. The method according to claim 1, wherein: Obtaining the additional system information for the reduced capability UE comprises: identifying a system information request mode based on the information included in the dedicated field or the configuration information element; and The additional system information is obtained from the base station according to the system information request mode without sending a request for the additional system information.

5. The method according to claim 1, further comprising: determining a set of thresholds for sending the request for the additional system information based at least in part on the information included in the dedicated field or the configuration information element; as well as The request for the additional system information is sent to the base station based at least in part on a determination that the UE satisfies at least one threshold in the set of thresholds.

6. The method according to claim 5, wherein: The dedicated field comprises one or more bit fields, and wherein determining the set of thresholds is based at least in part on one or more values ​​of the one or more bit fields of the dedicated field.

7. The method according to claim 5, wherein: The set of thresholds for sending the request for the additional system information includes a first threshold associated with the bandwidth capability of the UE, a second threshold associated with the number of antennas of the UE, a third threshold associated with the signal quality of a signal received at the UE, a fourth threshold associated with the number of requests for the additional system information that the UE can send, or any combination thereof.

8. The method according to claim 1, wherein: The first system information is received via a first downlink bandwidth portion associated with a reduced capability UE, the method further comprising: Receiving, via the first system information, an indication of a second downlink bandwidth portion for obtaining the additional system information, wherein the additional system information is obtained via the second downlink bandwidth portion, wherein the second downlink bandwidth portion is associated with a reduced capability UE, and wherein the second downlink bandwidth portion is the same as the first downlink bandwidth portion or different from the first downlink bandwidth portion.

9. The method according to claim 1, further comprising: The request for the additional system information is sent to the base station via an uplink bandwidth portion associated with a reduced capability UE, wherein the uplink bandwidth portion is indicated via the first system information.

10. The method according to claim 1, wherein: The dedicated field comprises one or more bit fields, wherein a first value of a bit field in the one or more bit fields indicates that the additional system information for the reduced capability UE will be received in response to an on-demand request, and wherein a second value of the bit field in the one or more bit fields indicates that the additional system information for the reduced capability UE will not be received in response to an on-demand request.

11. The method according to claim 1, further comprising: determining an additional set of system information for a reduced capability UE, the additional set of system information being requested based at least in part on the information included in the dedicated field or the configuration information element, wherein the additional set of system information comprises a synchronization signal block, a downlink broadcast reference signal, a control resource set configuration, a common search space configuration for a random access procedure, paging and system information update information, or any combination thereof; and An indication of the additional system information included in the set of additional system information is sent to the base station, wherein obtaining the additional system information is based at least in part on sending the indication of the additional system information.

12. The method according to claim 1, further comprising: determining, based at least in part on the information included in the dedicated field or the configuration information element, a set of parameters that the base station may use to send the additional system information; as well as An indication of one or more parameters included in the set of parameters is sent to the base station, wherein obtaining the additional system information is based at least in part on sending the indication of the one or more parameters.

13. The method according to claim 12, wherein: The one or more parameters include a modulation and coding scheme, a code rate, or both.

14. The method according to claim 12, wherein: The one or more parameters used to obtain the additional system information are different from at least one parameter used to receive the first system information.

15. The method according to claim 1, further comprising: A periodicity associated with the additional system information is determined based at least in part on the information included in the dedicated field or the configuration information element, wherein obtaining the additional system information is based at least in part on determining the periodicity.

16. The method according to claim 15, wherein: The periodicity associated with the additional system information is different from the periodicity associated with the first system information, and wherein the periodicity associated with the additional system information is based at least in part on information included in the additional system information, the information comprising synchronization signal blocks, downlink broadcast reference signals, control resource set configurations, common search space configurations for random access procedures, paging and system information update information, or any combination thereof.

17. The method according to claim 1, wherein: The first system information includes a first type of system information block (SIB), a first type of master information block (MIB), or a combination thereof, and the method further includes: An indication of the following is received via the first system information: one or more downlink bandwidth portion configurations associated with a UE with reduced capability for receiving the first system information, one or more uplink bandwidth portion configurations associated with a UE with reduced capability for sending a request for the additional system information, one or more additional downlink bandwidth portion configurations associated with the UE with reduced capability for receiving the additional system information, or any combination thereof.

18. The method according to claim 17, wherein: The additional system information includes a second type of SIB different from the first type, a second type of MIB, or a combination thereof.

19. The method according to claim 1, wherein: The first system information is received in a multiplexed manner with other system information receivable by other UEs.

20. The method according to claim 1, wherein: The first system information is received via a physical broadcast channel associated with the reduced capability UE, a physical downlink shared channel associated with the reduced capability UE, or both.

21. A method for wireless communication at a base station, comprising: Sending first system information to a user equipment (UE), the first system information being for reduced capability UEs including a UE having a bandwidth capability below a threshold, the UE being a reduced capability UE; evaluating the first system information against a dedicated field, the dedicated field comprising an indicator that additional system information for reduced capability UEs will be sent in response to an on-demand request; as well as When the dedicated field is included in the first system information, the additional system information for the UE with reduced capability is sent according to the information included in the dedicated field, or when the dedicated field is missing in the first system information, the additional system information for the UE with reduced capability is sent according to the information included in the configuration information element of the first system information.

22. The method according to claim 21, wherein: Sending the additional system information for the reduced capability UE comprises: determining, based at least in part on the information included in the dedicated field or the configuration information element, that the additional system information is to be sent in response to an on-demand request; and A request for the additional system information is received from the UE based on the information included in the dedicated field or the configuration information element.

23. The method according to claim 21, wherein: Sending the additional system information for the reduced capability UE comprises: identifying a system information request mode based on the information included in the dedicated field or the configuration information element; and According to the system information request mode, a request for the additional system information is received from the UE via a resource set associated with a physical random access channel, a sounding reference signal, a physical uplink shared channel, or a physical uplink control channel.

24. The method according to claim 21, wherein: Sending the additional system information for the reduced capability UE comprises: identifying a system information request mode based on the information included in the dedicated field or the configuration information element; and The additional system information is sent from the base station according to the system information request pattern without receiving a request for the additional system information.

25. The method of claim 21, further comprising: determining a set of thresholds for sending the request for the additional system information based at least in part on the information included in the dedicated field or the configuration information element; as well as The request for the additional system information is received from the UE based at least in part on the UE satisfying at least one threshold in the set of thresholds, wherein the set of thresholds includes a first threshold associated with a bandwidth capability of the UE, a second threshold associated with a number of antennas of the UE, a third threshold associated with a signal quality of a signal received at the UE, a fourth threshold associated with a number of requests for the additional system information that the UE is able to send, or any combination thereof.

26. The method according to claim 21, wherein: The first system information, the additional system information, or both are received via a downlink bandwidth portion associated with a reduced capability UE.

27. The method of claim 21, further comprising: A request for the additional system information is received from a reduced capability UE via a portion of an uplink bandwidth associated with the UE.

28. The method of claim 21, wherein: The dedicated field comprises one or more bit fields, wherein a first value of a bit field in the one or more bit fields indicates that the additional system information for the reduced capability UE will be received in response to an on-demand request, and wherein a second value of the bit field in the one or more bit fields indicates that the additional system information for the reduced capability UE will not be received in response to an on-demand request.

29. An apparatus for wireless communication at a user equipment (UE), comprising: processor; a memory coupled to the processor; as well as Instructions, which are stored in the memory and can be executed by the processor to cause the device to perform the following operations: receiving first system information from a base station, the first system information being for reduced capability UEs including UEs having a bandwidth capability below a threshold, the UEs being reduced capability UEs; evaluating the first system information against a dedicated field, the dedicated field comprising an indicator that additional system information for reduced capability UEs is to be received in response to an on-demand request; as well as When the dedicated field is included in the first system information, the additional system information for the UE with reduced capability is obtained according to the information included in the dedicated field, or when the dedicated field is missing in the first system information, the additional system information for the UE with reduced capability is obtained according to the information included in the configuration information element of the first system information.

30. An apparatus for wireless communication at a base station, comprising: processor; a memory coupled to the processor; as well as Instructions, which are stored in the memory and can be executed by the processor to cause the device to perform the following operations: Sending first system information to a user equipment (UE), the first system information being for reduced capability UEs including a UE having a bandwidth capability below a threshold, the UE being a reduced capability UE; evaluating the first system information against a dedicated field, the dedicated field comprising an indicator that additional system information for reduced capability UEs will be sent in response to an on-demand request; as well as When the dedicated field is included in the first system information, the additional system information for the UE with reduced capability is sent according to the information included in the dedicated field, or when the dedicated field is missing in the first system information, the additional system information for the UE with reduced capability is sent according to the information included in the configuration information element of the first system information.

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