Transmitting synchronization signal blocks via reconfigurable intelligent surface

Abstract

Methods, systems, and devices for wireless communication are described. Generally, the described techniques provide for performing an initial access procedure including transmitting or receiving SSBs based on a capability of a UE to use RIS. In some examples, a base station can transmit SSBs using two synchronization lattices. For example, a base station can transmit SSBs on a first synchronization lattice for UEs that do not support RIS and on a second synchronization lattice for UEs that support RIS. In some examples, a base station can transmit different types of SSBs. For example, a base station can transmit a first type of SSBs for UEs that do not support RIS and a second type of SSBs for UEs that support RIS. A UE can search for and receive SSBs according to a capability of the UE.

Description

TECHNICAL FIELD

[0001] The following relates to wireless communications, including transmitting one or more synchronization signal blocks via one or more reconfigurable intelligent surfaces. BACKGROUND

[0002] Wireless communications systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems can be capable of supporting communication with multiple users by sharing the available system resources (e.g., time, frequency, and power). Examples of such multiple- access systems include fourth generation (4G) systems such as Long Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, or LTE-A Pro systems, and fifth generation (5G) systems which can be referred to as New Radio (NR) systems. These systems can employ technologies 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 communications system can include one or more base stations or one or more network access nodes, each simultaneously supporting communication for multiple communication devices, which can be otherwise known as user equipment (UE).

[0003] SUMMARY

[0004] The described techniques relate to improved methods, systems, devices, and apparatuses that support transmitting synchronization signal blocks (SSBs) via reconfigurable intelligent surfaces (RISs). Generally, the described techniques provide for performing initial access procedures including transmitting or receiving SSBs, which can include synchronization and system information and other information, based on a capability of a UE to use RISs. In some examples, a base station can transmit SSBs using two synchronization lattices. For example, a base station can transmit SSBs on a first synchronization lattice for UEs that do not support RISs (e.g., legacy UEs) and on a second synchronization lattice for UEs that support RISs. In some examples, a base station can transmit different types of SSBs. For example, a base station can transmit a first type of SSB for UEs that do not support RISs (e.g., legacy UEs) and a second type of SSB for UEs that support RISs. A UE can search for and receive SSBs according to a capability of the UE.

[0005] A method of wireless communication is described. The method can include identifying a first synchronization raster and a second synchronization raster for the UE to receive one or more synchronization signal blocks, the second synchronization raster including a frequency location associated with a reconfigurable intelligent surface; monitoring one or more resource elements for the one or more synchronization signal blocks based on one or more of the first synchronization raster or the second synchronization raster; and receiving at least one synchronization signal block based on monitoring the one or more resource elements.

[0006] An apparatus for wireless communication at a UE is described. The apparatus can include a processor, memory coupled with the processor, and instructions stored in the memory. The instructions can be executable by the processor to cause the apparatus to identify a first synchronization raster and a second synchronization raster for the UE to receive one or more synchronization signal blocks, the second synchronization raster including a frequency location associated with a reconfigurable intelligent surface; monitor one or more resource elements for the one or more synchronization signal blocks based on one or more of the first synchronization raster or the second synchronization raster; and receive at least one synchronization signal block based on monitoring the one or more resource elements.

[0007] Another apparatus for wireless communication at a UE is described. The apparatus can include means for identifying a first synchronization raster and a second synchronization raster for the UE to receive one or more synchronization signal blocks, the second synchronization raster including a frequency location associated with a reconfigurable intelligent surface; monitoring one or more resource elements for the one or more synchronization signal blocks based on one or more of the first synchronization raster or the second synchronization raster; and receiving at least one synchronization signal block based on monitoring the one or more resource elements.

[0008] A non-transitory computer-readable medium storing code for wireless communication at a UE is described. The code can include instructions executable by a processor to identify a first synchronization raster and a second synchronization raster for the UE to receive one or more synchronization signal blocks, the second synchronization raster including a frequency location associated with a reconfigurable intelligent surface; monitor one or more resource elements for the one or more synchronization signal blocks based on one or more of the first synchronization raster or the second synchronization raster; and receive at least one synchronization signal block based on monitoring the one or more resource elements.

[0009] In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, monitoring the one or more resource elements can include operations, features, means, or instructions for scanning one or more frequency locations in the first synchronization raster for the one or more synchronization signal blocks, failing to detect the one or more synchronization signal blocks at the one or more frequency locations in the first synchronization raster, and scanning one or more frequency locations in the second synchronization raster for the one or more synchronization signal blocks, where receiving the at least one synchronization signal block can be based on scanning the one or more frequency locations in the second synchronization raster.

[0010] In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, monitoring the one or more resource elements can include operations, features, means, or instructions for scanning one or more frequency locations in the first synchronization raster for the one or more synchronization signal blocks, where receiving the at least one synchronization signal block can be based on scanning the one or more frequency locations in the first synchronization raster.

[0011] Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein can further include operations, features, means, or instructions for refraining from scanning the one or more frequency locations in the second synchronization raster based on receiving the at least one synchronization signal block at the one or more frequency locations in the first synchronization raster.

[0012] Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein can further include operations, features, means, or instructions for determining that a priority associated with the first synchronization raster can be different than a priority associated with the second synchronization raster, where monitoring the one or more resource elements can be based on the determination.

[0013] In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, determining that a priority associated with the first synchronization raster can be different than a priority associated with the second synchronization raster can include operations, features, means, or instructions for determining that the priority associated with the first synchronization raster can be higher than the priority associated with the second synchronization raster.

[0014] In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, determining that a priority associated with the first synchronization raster can be different than a priority associated with the second synchronization raster can include operations, features, means, or instructions for determining that the priority associated with the first synchronization raster can be lower than the priority associated with the second synchronization raster.

[0015] Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein can further include operations, features, means, or instructions for receiving, from the base station, an indication of one of the first synchronization raster or the second synchronization raster that the UE can use to receive one or more synchronization signal blocks, where monitoring the one or more resource elements can be based on receiving the indication.

[0016] Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein can further include operations, features, means, or instructions for receiving, from the base station, an indication that the second synchronization raster can be associated with the reconfigurable intelligent surface, where the UE uses one or both of the first synchronization raster or the second synchronization raster based on receiving the indication that the second synchronization raster can be associated with the reconfigurable intelligent surface and whether the UE can be capable of interacting with the reconfigurable intelligent surface.

[0017] In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, identifying the first synchronization raster and the second synchronization raster can include operations, features, means, or instructions for identifying a first set of frequency locations in the first synchronization raster and a second set of frequency locations in the second synchronization raster, the second set of frequency locations in the second synchronization raster can not overlap with the first set of frequency locations in the first synchronization raster.

[0018] A method of wireless communication is described at a UE. The method can include identifying a first type of synchronization signal block and a second type of synchronization signal block associated with a same synchronization raster and for reception by the UE, where the second type of synchronization signal block is associated with a reconfigurable intelligent surface, monitoring one or more resource elements (REs) for one or more synchronization signal blocks including one or more of the first type of synchronization signal block or the second type of synchronization signal block, and receiving at least one of the first type of synchronization signal block or the second type of synchronization signal block based on monitoring the one or more REs.

[0019] An apparatus for wireless communication at a UE is described. The apparatus can include a processor, memory coupled with the processor, and instructions stored in the memory. The instructions can be executable by the processor to cause the apparatus to identify a first type of synchronization signal block and a second type of synchronization signal block associated with a same synchronization raster and for reception by the UE, where the second type of synchronization signal block is associated with a reconfigurable intelligent surface, monitor one or more resource elements (REs) for one or more synchronization signal blocks including one or more of the first type of synchronization signal block or the second type of synchronization signal block, and receive at least one of the first type of synchronization signal block or the second type of synchronization signal block based on monitoring the one or more REs.

[0020] Another apparatus for wireless communication at a UE is described. The apparatus can include means for identifying a first type of synchronization signal block and a second type of synchronization signal block associated with a same synchronization raster and for reception by the UE, where the second type of synchronization signal block is associated with a reconfigurable intelligent surface, monitoring one or more resource elements (REs) for one or more synchronization signal blocks including one or more of the first type of synchronization signal block or the second type of synchronization signal block, and receiving at least one of the first type of synchronization signal block or the second type of synchronization signal block based on monitoring the one or more REs.

[0021] A non-transitory computer-readable medium storing code for wireless communication at a UE is described. The code can include instructions executable by a processor to identify a first type of synchronization signal block and a second type of synchronization signal block associated with a same synchronization raster and for reception by the UE, where the second type of synchronization signal block is associated with a reconfigurable intelligent surface, monitor one or more resource elements (REs) for one or more synchronization signal blocks including one or more of the first type of synchronization signal block or the second type of synchronization signal block, and receive at least one of the first type of synchronization signal block or the second type of synchronization signal block based on monitoring the one or more REs.

[0022] In some examples of the method, apparatuses, and non-transitory computer- readable medium described herein, monitoring the one or more resource elements can include operations, features, means, or instructions for scanning a first frequency location in the synchronization raster for the first type of synchronization signal block, failing to detect the first type of synchronization signal block at the first frequency location, and scanning the first frequency location in the synchronization raster for the second type of synchronization signal block, where receiving at least one synchronization signal block can include operations, features, means, or instructions for receiving the second type of synchronization signal block based on scanning the first frequency location.

[0023] In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, monitoring the one or more resource elements can include operations, features, means, or instructions for scanning each frequency location in the synchronization raster for the first type of synchronization signal block, failing to detect the first type of synchronization signal block at each frequency location in the synchronization raster, and scanning one or more frequency locations in the synchronization raster for the second type of synchronization signal block, where receiving at least one synchronization signal block can include operations, features, means, or instructions for receiving the second type of synchronization signal block based on scanning the one or more frequency locations.

[0024] In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, monitoring the one or more resource elements can include operations, features, means, or instructions for scanning at least one frequency location in the synchronization raster for the first type of synchronization signal block, where receiving the at least one synchronization signal block includes receiving the first type of synchronization signal block based on scanning the at least one frequency location.

[0025] Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein can further include operations, features, means, or instructions for determining that a priority associated with the first type of synchronization signal block can be different than a priority associated with the second type of synchronization signal block, where monitoring the one or more resource elements can be based on the determination.

[0026] In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, determining that a priority associated with the first type of synchronization signal block can be different than a priority associated with the second type of synchronization signal block can include operations, features, means, or instructions for determining that the priority associated with the first type of synchronization signal block can be higher than the priority associated with the second type of synchronization signal block.

[0027] In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, determining that a priority associated with the first type of synchronization signal block can be different than a priority associated with the second type of synchronization signal block can include operations, features, means, or instructions for determining that the priority associated with the first type of synchronization signal block can be lower than the priority associated with the second type of synchronization signal block.

[0028] In some examples of the method, apparatus, and non-transitory computer-readable medium described herein, identifying the first type of synchronization signal block and the second type of synchronization signal block can include operations, features, means, or instructions for identifying a first location of a primary synchronization signal associated with the first type of synchronization signal block and a second location of a primary synchronization signal associated with the second type of synchronization signal block.

[0029] In some examples of the method, apparatus, and non-transitory computer-readable medium described herein, identifying the first location and the second location can include operations, features, means, or instructions for identifying a first time location of a primary synchronization signal associated with the first type of synchronization signal block and a second time location of a primary synchronization signal associated with the second type of synchronization signal block.

[0030] In some examples of the method, apparatus, and non-transitory computer-readable medium described herein, identifying the first type of synchronization signal block and the second type of synchronization signal block can include operations, features, means, or instructions for identifying a first mapping order of secondary synchronization signals associated with the first type of synchronization signal block and a second mapping order of secondary synchronization signals associated with the second type of synchronization signal block.

[0031] In some examples of the method, apparatus, and non-transitory computer-readable medium described herein, identifying the first mapping order and the second mapping order can include operations, features, means, or instructions for identifying a first increasing mapping order of secondary synchronization signals associated with the first type of synchronization signal block and a second decreasing mapping order of secondary synchronization signals associated with the second type of synchronization signal block.

[0032] In some examples of the method, apparatus, and non-transitory computer-readable medium described herein, identifying the first mapping order and the second mapping order can include operations, features, means, or instructions for identifying a first decreasing mapping order of secondary synchronization signals associated with the first type of synchronization signal block and a second increasing mapping order of secondary synchronization signals associated with the second type of synchronization signal block.

[0033] In some examples of the method, apparatus, and non-transitory computer-readable medium described herein, the first mapping order and the second mapping order each include an order for mapping a sequence of symbols associated with a secondary synchronization signal onto one or more resource elements.

[0034] In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, identifying the first type of synchronization signal block and the second type of synchronization signal block can include operations, features, means, or instructions for identifying a first mapping order of demodulation reference signals associated with the first type of synchronization signal block and a second mapping order of demodulation reference signals associated with the second type of synchronization signal block.

[0035] In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, identifying the first mapping order and the second mapping order can include operations, features, means, or instructions for identifying a first increasing mapping order of demodulation reference signals associated with the first type of synchronization signal block and a second decreasing mapping order of demodulation reference signals associated with the second type of synchronization signal block.

[0036] In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, identifying the first mapping order and the second mapping order can include operations, features, means, or instructions for identifying a first decreasing mapping order of demodulation reference signals associated with the first type of synchronization signal block and a second increasing mapping order of demodulation reference signals associated with the second type of synchronization signal block.

[0037] In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first mapping order and the second mapping order each include an order for mapping a sequence of symbols associated with a demodulation reference signal onto one or more resource elements.

[0038] Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein can further include operations, features, means, or instructions for receiving, from a base station, an indication of one of the first type of synchronization signal block or the second type of synchronization signal block, where monitoring the one or more resource elements can be based on receiving the indication.

[0039] In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, receiving the indication can include operations, features, means, or instructions for receiving, from a base station, a master information block including the indication.

[0040] A method of wireless communication is described. The method can include identifying a first synchronization raster and a second synchronization raster for a base station to use to transmit one or more synchronization signal blocks, the second synchronization raster including a frequency location associated with a reconfigurable intelligent surface; configuring one or more resource elements (REs) to transmit the one or more synchronization signal blocks based on the first synchronization raster and the second synchronization raster; and transmitting the one or more synchronization signal blocks using the configured one or more REs.

[0041] An apparatus for wireless communication at a base station is described. The apparatus can include a processor, memory coupled with the processor, and instructions stored in the memory. The instructions can be executable by the processor to cause the apparatus to identify a first synchronization raster and a second synchronization raster for the base station to use to transmit one or more synchronization signal blocks, the second synchronization raster including a frequency location associated with a reconfigurable intelligent surface; configure one or more resource elements (REs) to transmit the one or more synchronization signal blocks based on the first synchronization raster and the second synchronization raster; and transmit the one or more synchronization signal blocks using the configured one or more REs.

[0042] Another apparatus for wireless communication at a base station is described. The apparatus can include means for identifying a first synchronization raster and a second synchronization raster for the base station to use to transmit one or more synchronization signal blocks, the second synchronization raster including a frequency location associated with a reconfigurable intelligent surface; configuring one or more resource elements (REs) to transmit the one or more synchronization signal blocks based on the first synchronization raster and the second synchronization raster; and transmitting the one or more synchronization signal blocks using the configured one or more REs.

[0043] A non-transitory computer-readable medium storing code for wireless communication at a base station is described. The code can include instructions executable by a processor to identify a first synchronization raster and a second synchronization raster for the base station to use to transmit one or more synchronization signal blocks, the second synchronization raster including a frequency location associated with a reconfigurable intelligent surface; configure one or more resource elements (REs) to transmit the one or more synchronization signal blocks based on the first synchronization raster and the second synchronization raster; and transmit the one or more synchronization signal blocks using the configured one or more REs.

[0044] In some examples of the method, apparatuses, and non-transitory computer- readable medium described herein, configuring the one or more resource elements can include operations, features, means, or instructions for configuring resource elements at one or more frequency locations in the first synchronization raster and configuring resource elements at one or more frequency locations in the second synchronization raster, and transmitting the one or more synchronization signal blocks can include operations, features, means, or instructions for transmitting the one or more synchronization signal blocks using the resource elements at the one or more frequency locations in the first synchronization raster and the resource elements at the one or more frequency locations in the second synchronization raster.

[0045] Some examples of the method, apparatuses, and non-transitory computer- readable medium described herein can further include operations, features, means, or instructions for transmitting, to one or more UEs, an indication of one of the first synchronization raster or the second synchronization raster for the UEs to use for receiving the one or more synchronization signal blocks, where configuring the one or more resource elements can be based on the indication.

[0046] In some examples of the method, apparatuses, and non-transitory computer- readable medium described herein, identifying the first synchronization raster and the second synchronization raster can include operations, features, means, or instructions for identifying a first set of frequency locations in the first synchronization raster and a second set of frequency locations in the second synchronization raster, the second set of frequency locations in the second synchronization raster can not overlap with the first set of frequency locations in the first synchronization raster.

[0047] A method of wireless communication is described. The method can include identifying a first type of synchronization signal block and a second type of synchronization signal block associated with a same synchronization raster and for transmission by the base station, where the second type of synchronization signal block is associated with a reconfigurable intelligent surface, configuring one or more resource elements to transmit one or more synchronization signal blocks including one or more of the first type of synchronization signal block or the second type of synchronization signal block, and transmitting the one or more synchronization signal blocks using the configured one or more resource elements.

[0048] An apparatus for wireless communication at a base station is described. The apparatus can include a processor, memory coupled with the processor, and instructions stored in the memory. The instructions can be executable by the processor to cause the apparatus to identify a first type of synchronization signal block and a second type of synchronization signal block associated with a same synchronization raster and for transmission by the base station, where the second type of synchronization signal block is associated with a reconfigurable intelligent surface, configure one or more resource elements to transmit one or more synchronization signal blocks including one or more of the first type of synchronization signal block or the second type of synchronization signal block, and transmit the one or more synchronization signal blocks using the configured one or more resource elements.

[0049] Another apparatus for wireless communication at a base station is described. The apparatus can include means for identifying a first type of synchronization signal block and a second type of synchronization signal block associated with a same synchronization raster and for transmission by the base station, where the second type of synchronization signal block is associated with a reconfigurable intelligent surface, configuring one or more resource elements to transmit one or more synchronization signal blocks including one or more of the first type of synchronization signal block or the second type of synchronization signal block, and transmitting the one or more synchronization signal blocks using the configured one or more resource elements.

[0050] A non-transitory computer-readable medium storing code for wireless communication at a base station is described. The code can include instructions executable by a processor to identify a first type of synchronization signal block and a second type of synchronization signal block associated with a same synchronization raster and for transmission by the base station, where the second type of synchronization signal block is associated with a reconfigurable intelligent surface, configure one or more resource elements to transmit one or more synchronization signal blocks including one or more of the first type of synchronization signal block or the second type of synchronization signal block, and transmit the one or more synchronization signal blocks using the configured one or more resource elements.

[0051] Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein can further include operations, features, means, or instructions for transmitting, to one or more UEs, an indication of one of the first type of synchronization signal block or the second type of synchronization signal block that the UEs should monitor, where configuring the one or more resource elements can be based on the indication.

[0052] In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, transmitting the indication can include operations, features, means, or instructions for transmitting a master information block including the indication.

[0053] In some examples of the method, apparatus, and non-transitory computer-readable medium described herein, identifying the first type of synchronization signal block and the second type of synchronization signal block can include operations, features, means, or instructions for identifying a first location of a primary synchronization signal associated with the first type of synchronization signal block and a second location of a primary synchronization signal associated with the second type of synchronization signal block.

[0054] In some examples of the method, apparatus, and non-transitory computer-readable medium described herein, identifying the first location and the second location can include operations, features, means, or instructions for identifying a first time location of a primary synchronization signal associated with the first type of synchronization signal block and a second time location of a primary synchronization signal associated with the second type of synchronization signal block.

[0055] In some examples of the method, apparatus, and non-transitory computer-readable medium described herein, identifying the first type of synchronization signal block and the second type of synchronization signal block can include operations, features, means, or instructions for identifying a first mapping order of secondary synchronization signals associated with the first type of synchronization signal block and a second mapping order of secondary synchronization signals associated with the second type of synchronization signal block.

[0056] In some examples of the method, apparatus, and non-transitory computer-readable medium described herein, identifying the first mapping order and the second mapping order can include operations, features, means, or instructions for identifying a first increasing mapping order of secondary synchronization signals associated with the first type of synchronization signal block and a second decreasing mapping order of secondary synchronization signals associated with the second type of synchronization signal block.

[0057] In some examples of the method, apparatus, and non-transitory computer-readable medium described herein, identifying the first mapping order and the second mapping order can include operations, features, means, or instructions for identifying a first decreasing mapping order of secondary synchronization signals associated with the first type of synchronization signal block and a second increasing mapping order of secondary synchronization signals associated with the second type of synchronization signal block.

[0058] In some examples of the method, apparatus, and non-transitory computer-readable medium described herein, the first mapping order and the second mapping order each include an order for mapping a sequence of symbols associated with a secondary synchronization signal onto one or more resource elements.

[0059] In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, identifying the first type of synchronization signal block and the second type of synchronization signal block can include operations, features, means, or instructions for identifying a first mapping order of demodulation reference signals associated with the first type of synchronization signal block and a second mapping order of demodulation reference signals associated with the second type of synchronization signal block.

[0060] In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, identifying the first mapping order and the second mapping order can include operations, features, means, or instructions for identifying a first increasing mapping order of demodulation reference signals associated with the first type of synchronization signal block and a second decreasing mapping order of demodulation reference signals associated with the second type of synchronization signal block.

[0061] In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, identifying the first mapping order and the second mapping order can include operations, features, means, or instructions for identifying a first decreasing mapping order of demodulation reference signals associated with the first type of synchronization signal block and a second increasing mapping order of demodulation reference signals associated with the second type of synchronization signal block.

[0062] In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first mapping order and the second mapping order each include an order for mapping a sequence of symbols associated with a secondary synchronization signal onto one or more resource elements. SUMMARY

[0064] Figure 1 Examples of a wireless communications system that supports transmission of one or more synchronization signal blocks via one or more reconfigurable intelligent surfaces are described that can support techniques for transmitting synchronization signal blocks via one or more reconfigurable intelligent surfaces in accordance with aspects of the present disclosure.

[0065] Figure 2 Examples of a wireless communications system that supports transmission of one or more synchronization signal blocks via one or more reconfigurable intelligent surfaces are described that can support techniques for transmitting synchronization signal blocks via one or more reconfigurable intelligent surfaces in accordance with aspects of the present disclosure.

[0066] Figure 3 Examples of process flows that support transmission of one or more synchronization signal blocks via one or more reconfigurable intelligent surfaces in accordance with aspects of the present disclosure are described.

[0067] Figure 4 Examples of process flows that support transmission of one or more synchronization signal blocks via one or more reconfigurable intelligent surfaces in accordance with aspects of the present disclosure are described.

[0068] Figures 5A-5B Examples are described of resource mapping schemes that support transmission of one or more synchronization signal blocks via one or more reconfigurable intelligent surfaces, in accordance with aspects of the present disclosure.

[0069] Figures 6A-6B Examples are described of resource mapping schemes that support transmission of one or more synchronization signal blocks via one or more reconfigurable intelligent surfaces, in accordance with aspects of the present disclosure.

[0070] Figures 7A-7B Examples are described of resource mapping schemes that support transmission of one or more synchronization signal blocks via one or more reconfigurable intelligent surfaces, in accordance with aspects of the present disclosure.

[0071] Figure 8 and 9 A block diagram of a device that supports transmission of one or more synchronization signal blocks via one or more reconfigurable intelligent surfaces is described, in accordance with aspects of the present disclosure.

[0072] Figure 10 A block diagram of a communications manager that supports transmission of one or more synchronization signal blocks via one or more reconfigurable intelligent surfaces is shown, in accordance with aspects of the present disclosure.

[0073] Figure 11 A diagram of a system including a device that supports transmission of one or more synchronization signal blocks via one or more reconfigurable intelligent surfaces is shown, in accordance with aspects of the present disclosure.

[0074] Figure 12 and 13 A block diagram of a device that supports transmission of one or more synchronization signal blocks via one or more reconfigurable intelligent surfaces is described, in accordance with aspects of the present disclosure.

[0075] Figure 14 A block diagram of a communications manager that supports transmission of one or more synchronization signal blocks via one or more reconfigurable intelligent surfaces is shown, in accordance with aspects of the present disclosure.

[0076] Figure 15 A diagram of a system including a device that supports transmission of one or more synchronization signal blocks via one or more reconfigurable intelligent surfaces is shown, in accordance with aspects of the present disclosure.

[0077] Figures 16 to 21 A flow diagram illustrating a method that supports transmission of one or more synchronization signal blocks via one or more reconfigurable intelligent surfaces in accordance with aspects of the present disclosure is shown.

[0078] DETAILED DESCRIPTION

[0079] Some wireless communication systems, such as a fifth generation (5G) New Radio (NR) system, can include reconfigurable intelligent surfaces (RISs) to extend wireless communication coverage. For example, a wireless communication system can employ RISs to extend communication coverage around or due to blockers, with negligible power consumption cost. The RISs can extend coverage by reflecting one or more directional beams transmitted by a base station around a blocker, such that the base station can serve one or more user equipments (UEs) even in the presence of a blocked path or channel between the UEs and the base station. In some examples, a wireless communication system that supports use of RISs can have UEs that support use of RISs and UEs that do not support use of RISs (e.g., legacy UEs, non-RIS UEs). Accordingly, a base station can use different initial access procedures for each type of UE (e.g., RIS UE or non-RIS UE), and can use methods in which the base station and the UE can know whether RISs can be used or are being used.

[0080] Some methods for providing different initial access procedures can include methods for a base station to transmit synchronization signal blocks (SSBs), which can include synchronization and system information, among other information. In some examples, the base station can transmit SSBs using two different synchronization lattices. For example, the base station can transmit SSBs using a first synchronization lattice for UEs that do not support use of RISs (e.g., legacy UEs, non-RIS UEs) and a second synchronization lattice for RIS-capable or RIS-using UEs. Each type of UE can search for and receive SSBs at frequency locations in the first or second synchronization lattice depending on the capabilities of the UE (e.g., the UE’s ability to communicate based on one or more RISs). For example, a RIS-using UE can search for SSBs at frequency locations in the first lattice but fail to detect, which can be due to the presence of a blocked path or channel between the UE and the base station. In response to failing to detect any SSBs, the UE can search frequency locations in the second lattice and can receive SSBs accordingly.

[0081] In some examples, a base station can transmit two types of SSBs on the same synchronization raster. For example, the base station can transmit a first type of SSB for UEs that do not support the use of RIS and a second type of SSB for UEs that support or are using RIS. Each type of UE can search for and receive the first or second type of SSB according to the capabilities of the UE. For example, a UE that supports or is using RIS can search for the first type of SSB at every frequency location (or at least some of the frequency locations) in the synchronization raster and fail to detect the first type of SSB. In response to failing to detect the first type of SSB, the UE can monitor (e.g., scan) the synchronization raster for the second type of SSB and receive at least one SSB accordingly. In some implementations, the two types of SSBs can be distinguished by, for example, the location of the primary synchronization signal (PSS), the mapping order of the secondary synchronization signal (SSS), the mapping order of the demodulation reference signal (DMRS) associated with the physical broadcast channel (PBCH), one or more other factors, or any combination thereof. In some examples, implementing one or more aspects of the disclosure can enable a base station and a UE to perform an initial access procedure based on whether RIS is being used and whether the UE supports RIS, and can enable a UE to receive one or more SSBs according to its capabilities.

[0082] Aspects of the disclosure are initially described in the context of a wireless communications system. Aspects of the disclosure are further described in the context of process flow and resource mapping schemes. Aspects of the disclosure are further illustrated by and described with reference to apparatus diagrams, system diagrams, and flowcharts that relate to transmitting SSBs via RIS.

[0083] Figure 1 An example of a wireless communications system 100 that supports transmitting one or more SSBs via one or more RIS in accordance with aspects of the present disclosure is illustrated. The wireless communications system 100 can include one or more base stations 105, one or more UEs 115, and a core network 130. In some examples, the wireless communications system 100 can be a Long Term Evolution (LTE) network, an LTE- Advanced (LTE-A) network, an LTE-A Pro network, or a New Radio (NR) network. In some examples, the wireless communications system 100 can support enhanced broadband communications, ultra-reliable (e.g., mission critical) communications, low latency communications, communications with low-cost and low-complexity devices, or any combination thereof.

[0084] The base stations 105 can be dispersed throughout the geographic area 100 and can be

[0085] The UEs 115 can be dispersed throughout the coverage areas 110 of the wireless communications system 100, and each UE 115 can be stationary or mobile, or both at different times. The UEs 115 can be devices in different forms or have different capabilities. Some example UEs 115 are illustrated in FIG. 1. A UE 115, as used herein, can include a device that has a wireless Figure 1 Some of the example UEs 115 are illustrated in FIG. 1. The UEs 115 described herein can be able to communicate with various types of devices, such as other UEs 115, base stations 105, or network equipment (e.g., core network nodes, relay devices, integrated access and backhaul (IAB) nodes, or other network equipment), as shown in FIG. 1. Figure 1

[0086] The base stations 105 can communicate with the core network 130, or with one another, or both. For example, base stations 105 can interface with the core network 130 through one or more backhaul links 120 (e.g., via an SI, N2, N3, or other interface). The base stations 105 can communicate with one another over the backhaul links 120 (e.g., via an X2, Xn, or other interface) directly (e.g., directly between base stations 105), or indirectly (e.g., via the core network 130), or both. In some examples, the backhaul links 120 can be or include one or more wireless links.

[0087] One or more of the base stations 105 described herein can include or can be referred to by a person of ordinary skill in the art as a base transceiver station, a radio base station, an access point, a radio transceiver, a NodeB, an eNodeB (eNB), a nextgeneration NodeB or giga-NodeB (either of which can be referred to as a gNB), a Home NodeB, a Home eNodeB, or other suitable terminology.

[0088] ​A UE 115 can include or can be referred to as a mobile device, a wireless device, a remote device, a handheld device, or a subscriber device, or some other suitable terminology, where the “device” can also be referred to as a unit, a station, a terminal, or a client, among other examples. A UE 115 can also include or can 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, a UE 115 can 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 communications (MTC) device, among other examples, which can be implemented in various objects such as appliances or vehicles, meters or instruments, among other examples.

[0089] The UEs 115 described herein can be able to communicate with various types of devices, such as other UEs 115 that can sometimes act as relays as well as the base stations 105 and the network equipment including macro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations, among other examples, as shown in FIG. 1. Figure 1

[0090] The UEs 115 and the base stations 105 can wirelessly communicate with one another via one or more communication links 125 over one or more carriers. The term “carrier” can refer to a set of radio frequency spectrum resources with a defined physical layer structure configured to carry physical layer signaling or user data between a base station 105 and a

[0091] In some examples (e.g., in carrier aggregation configurations), a carrier can also have acquisition signaling or control signaling that coordinates operations for other carriers. A carrier can be associated with a frequency channel (e.g., an evolved universal mobile telecommunication system terrestrial radio access (E-UTRA) absolute radio frequency channel number (EARFCN)) and can be positioned according to a channel raster for discovery by UEs 115. Carriers can be operated in a standalone mode where initial acquisition and connection can be anchored by the carrier, or the carriers can be operated in a non- standalone mode where connection is anchored through a different carrier (e.g., a different carrier of a same or a different radio access technology). ​

[0092] The communication links 125 shown in wireless communications system 100 can include uplink transmissions from a UE 115 to a base station 105, or downlink transmissions from a base station 105 to a UE 115. Carriers can carry downlink or uplink communications (e.g., in an FDD mode) or can be configured to carry downlink and uplink communications (e.g., in a TDD mode).

[0093] A carrier can be associated with a particular bandwidth of the radio frequency spectrum, and in some examples the carrier bandwidth can be referred to as a “system bandwidth” of the carrier or wireless communications system 100. For example, the carrier bandwidth can be one of a set of determined bandwidths for carriers of a particular radio access technology, such as 1.4, 3, 5, 10, 15, 20, 40, or 80 megahertz (MHz). Devices of wireless communications system 100 (e.g., base stations 105, UEs 115, or both) can have hardware configurations that support communications over a particular carrier bandwidth, or can be configurable to support communications over one of a set of carrier bandwidths. In some examples, wireless communications system 100 can include base stations 105 or UEs 115 that support simultaneous communications via carriers associated with multiple carrier bandwidths. In some examples, each served UE 115 can be configured for operating over portions (e.g., sub-bands, BWPs) or all of a carrier bandwidth.

[0094] Signal waveforms transmitted on a carrier can be composed of multiple subcarriers (e.g., using multi-carrier modulation (MCM) techniques such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform spread OFDM (DFT-S-OFDM)). In OFDM, a resource element can consist of one symbol period (e.g., the duration of one modulation symbol) and one subcarrier, where the symbol period and subcarrier spacing are inversely related. The number of bits carried by each resource element can depend on the modulation scheme (e.g., the order of the modulation scheme, the code rate of the modulation scheme, or both). Thus, the more resource elements that a UE 115 receives and the higher the order of the modulation scheme, the higher the data rates for the UE 115. A wireless communications resource can refer to a combination of a radio frequency spectrum resource, a time resource, and a spatial resource (e.g., spatial layers or beams), and the use of multiple spatial layers can further increase the data rate for communications with a UE 115.

[0095] Time periods of base stations 105 or UEs 115 can be expressed in multiples of a basic time unit, which can refer to a sampling period of s 1 / (Δf max ·N f ) seconds, where Δf max may represent the maximum supported subcarrier spacing, and N fMaxSupportedDFTSize can represent the maximum supported discrete Fourier transform (DFT) size. Time intervals of the communications resources can be organized as radio frames, each radio frame having a specified duration (e.g., 10 milliseconds (ms)). Each radio frame can be identified by a system frame number (SFN) (e.g., ranging from 0 to 1023).

[0096] Each frame can include a plurality of consecutively numbered subframes or slots, and each subframe or slot can have a same duration. In some examples, a frame can be divided (e.g., in the time domain) into subframes, and each subframe can be further divided into slots. Alternatively, each frame can include a variable number of slots, and the number of slots can depend on the subcarrier spacing. Each slot can include a number of symbol periods (e.g., depending on the length of the cyclic prefix prepended to each symbol period). In some wireless communications systems 100, a slot can be further divided into multiple mini-slots containing one or more symbols. Excluding the cyclic prefix, each symbol period can contain one or more (e.g., N f The duration of a symbol period can depend on the subcarrier spacing or the operating band.

[0097] A subframe, a slot, a mini-slot, or a symbol can be the smallest scheduling unit (e.g., in the time domain) of the wireless communications system 100 and can 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) can be variable. Additionally or alternatively, the smallest scheduling unit of the wireless communications system 100 can be dynamically selected (e.g., in bursts of shortened TTIs (sTTIs)).

[0098] Physical channels can be multiplexed on a carrier according to various techniques. A physical control channel and a physical data channel can be multiplexed on a downlink carrier, for example, using one or more of time division multiplexing (TDM) techniques, frequency division multiplexing (FDM) techniques, or hybrid TDM-FDM techniques. A control region (e.g., a control resource set (CORESET)) for a physical control channel can be defined by a number of symbol periods and can extend across the system bandwidth or a subset of the system bandwidth of the carrier. One or more control regions (e.g., CORESETs) can be configured for a set of UEs 115. For example, one or more of the UEs 115 can monitor or search control regions according to one or more search space sets to look for control information, and each search space set can include one or more control channel candidates in one or more aggregation levels arranged in a cascaded manner. An aggregation level for a control channel candidate can refer to a number of control channel resources (e.g., control channel elements (CCEs)) associated with encoded information for a control information format having a given payload size. A search space set can include common search space sets configured for sending control information to multiple UEs 115 and UE-specific search space sets configured for sending control information to a specific UE 115.

[0099] In some examples, a base station 105 can be movable and therefore provide communication coverage for a moving geographic coverage area 110. In some examples, different geographic coverage areas 110 associated with different technologies can overlap, but different geographic coverage areas 110 associated with different technologies can be supported by the same base station 105. In other examples, overlapping geographic coverage areas 110 associated with different technologies can be supported by different base stations 105. The wireless communications system 100 can include, for example, a heterogeneous network in which different types of the base stations 105 provide coverage for various geographic coverage areas 110 using the same or different radio access technologies.

[0100] The wireless communications system 100 can support synchronous or asynchronous operation. For synchronous operation, the base stations 105 can have similar frame timings, and transmissions from different base stations 105 can be approximately aligned in time. For asynchronous operation, the base stations 105 can have different frame timings, and transmissions from different base stations 105 can not be aligned in time. The techniques described herein can be used for synchronous or asynchronous operation.

[0101] Some UEs 115 can be configured to employ operating modes that reduce power consumption, such as half-duplex communications (e.g., a mode where a UE 115 can support either transmission or reception, but not simultaneously with another UE 115) In some examples, a half-duplex communications mode can be used on a set of subframes arranged to support a reduced peak rate of a device, such as a machine type communication (MTC) device, or other similar devices. In some examples, other power conservation techniques for UEs 115 include entering a power saving deep sleep mode when not engaging in active communications, operating over a limited bandwidth (e.g., according to a narrowband protocol type), or a combination of these techniques. For example, some UEs 115 can be configured for operation using a narrowband protocol type, which is associated with a defined portion or range (e.g., set of subcarriers or resource blocks (RBs)) within a carrier, within a guardband of a carrier, or outside of a carrier.

[0102] The wireless communications system 100 can be configured to support ultra-reliable communications or low-latency communications, or various combinations thereof. For example, the wireless communications system 100 can be configured to support ultra-reliable low-latency communications (URLLC) or mission critical communications. UEs 115 can be designed to support ultra-reliable, low-latency, or mission critical functions (e.g., mission critical function). Ultra-reliable communications 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 herein.

[0103] In some examples, UEs 115 can also be able to communicate directly with other UEs 115 over 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 communications can be within the geographic coverage area 110 of a base station 105. Other UEs 115 in such a group can be outside the geographic coverage area 110 of a base station 105, or be otherwise unable to receive transmissions from a base station 105. In some examples, groups of UEs 115 communicating via D2D communications can utilize a one-to-many (1 :M) system in which each UE 115 transmits to every other UE 115 in the group. In some examples, a base station 105 facilitates the scheduling of resources for D2D communications. In other cases, D2D communications are carried out between UEs 115 without the involvement of a base station 105.

[0104] The core network 130 can provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. The core network 130 can be an evolved packet core (EPC) or 5G core (5GC), which can include at least one control plane entity that manages access and mobility (e.g., a mobility management entity (MME), an access and mobility management function (AMF)) and at least one user plane entity that routes packets or interconnects to external networks, such as a serving gateway (S-GW), a Packet Data Network (PDN) gateway (P-GW), or a user plane function (UPF). The control plane entity can manage non-access stratum (NAS) functions, such as mobility, authentication, and bearer management for UEs 115 served by base stations 105 associated with the core network 130. User IP packets can be transferred through the user plane entity, which can provide IP address allocation as well as other functions. The user plane entity can be connected to the IP services 150 of the one or more network operators. The IP services 150 can include access to the Internet, Intranet(s), an IP Multimedia Subsystem (IMS), or a Packet-Switched Streaming Service.

[0105] Some of the network devices, such as a base station 105, can include subcomponents such as an access network entity 140, which can be an example of an access node controller (ANC). Each access network entity 140 can communicate with UEs 115 through one or more other access network transmission entities 145, which can be referred to as radio heads, smart radio heads, or transmission / reception points (TRPs). Each access network transmission entity 145 can include one or more antenna panels. In some configurations, various functions of each access network entity 140 or base station 105 can be distributed across various network devices (e.g., radio heads and ANCs) or consolidated into a single network device (e.g., a base station 105).

[0106] The wireless communications system 100 can operate using one or more frequency bands, often in the range of 300 megahertz (MHz) to 300 gigahertz (GHz). Generally, the region from 300 MHz to 3 GHz is known as the ultra-high frequency (UHF) region or decimeter band, since the wavelengths range from approximately one decimeter to one meter in length. The UHF region includes bands such as the 700 MHz, 800 MHz, 900 MHz, 1.4 GHz, 1.9 GHz, and 2.1 GHz bands. The region from 3 GHz to 30 GHz is known as the super-high frequency (SHF) region or centimeter band, since the wavelengths range from approximately one centimeter to one meter in length. The SHF region includes bands such as the 5 GHz band. The region from 30 GHz to 300 GHz is known as the extremely high frequency (EHF) region or millimeter band, since the wavelengths range from approximately one millimeter to one centimeter in length. The EHF region includes bands such as the 38 GHz and 60 GHz bands. The wireless communications system 100 can support continuous

[0107] The wireless communications system 100 can utilize both licensed and unlicensed radio frequency spectrum bands. For example, the wireless communications system 100 can employ License Assisted Access (LAA), LTE-Unlicensed (LTE-U) radio access technology, or NR technology in an unlicensed frequency band such as the 5 GHz industrial, scientific, and medical (ISM) band. When operating in unlicensed frequency

[0108] Base stations 105 or UEs 115 can be equipped with multiple antennas, which can be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communications, or beamforming. The antennas of a base station 105 or a UE 115 can be co-located within one or more antenna arrays or antenna panels. In some examples, the antennas of a base station 105 can be located at different geographic locations. A base station 105 can have antenna arrays or antenna panels that have a number of rows and columns of antenna ports that the base station 105 can use for beamforming with a UE 115. Similarly, a UE 115 can have one or more antenna arrays or antenna panels that support various MIMO or beamforming operations. Additionally or alternatively, antenna panels can support radio frequency beamforming for signals transmitted via antenna ports.

[0109] Base stations 105 or UEs 115 can use MIMO communications to exploit multipath signal propagation and increase the spectral efficiency of a frequency channel by transmitting or receiving multiple signals via different spatial layers. Such techniques can be referred to as spatial multiplexing. The multiple signals may, for example, be transmitted by a transmitting device via different antennas or different combinations of antennas. Similarly, the multiple signals can be received by a receiving device via different antennas or different combinations of antennas. Each of the multiple signals can be referred to as a separate spatial stream, and can carry bits associated with the same data stream (e.g., the same codeword) or different data streams (e.g., different codewords). Different spatial layers can be associated with different antenna ports used for channel measurement and reporting. MIMO techniques include single-user MIMO (SU-MIMO), where multiple spatial layers are transmitted to the same receiving device, and multiple-user MIMO (MU-MIMO), where multiple spatial layers are transmitted to multiple devices.

[0110] Beamforming, which can 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 shape or steer a beam of energy in a specific direction along with the spatial path between the transmitting device and the receiving device. Beamforming can be achieved by combining the signals communicated by antennas of an antenna array such that signals transmitted or received with certain orientations (e.g., with respect to the antenna array of the transmitting device or receiving device, or with respect to some other orientation) experience constructive interference while others experience destructive interference. The combination of signals can be performed according to a beamforming weight set associated with a particular orientation. The beamforming weight set can include amplitude weights, phase weights, or both. The beamforming weight set can be defined such that signals transmitted or received with the beam oriented in a particular direction exhibit a desired signal characteristic such as a signal strength that is maximized (or maximally improved), a signal-to-noise ratio that is maximized (or maximally improved), a noise figure that is minimized (or minimized), or some other signal characteristic.

[0111] The base stations 105 or UEs 115 can use beamforming techniques to transmit or receive communications to or from one another. For example, a base station 105 can use multiple antennas or antenna arrays (e.g., antenna panels) to conduct beamforming operations for directional communications with UEs 115. Some signals (e.g., synchronization signals, reference signals, beam selection signals, or other control signals) can be transmitted by a base station 105 multiple times in different directions. For example, the base station 105 can transmit a signal according to different beamforming weight sets associated with different directions (e.g., directional transmissions). Transmissions in different beam directions can be used to identify (e.g., by a transmitting device such as a base station 105, or by a receiving device such as a UE 115) a beam direction for subsequent transmission or reception by the base station 105.

[0112] Some signals, such as data signals associated with a particular receiving device, can be transmitted by a base station 105 in a single beam direction (e.g., a direction associated with the receiving device, such as a UE 115). In some examples, the beam direction associated with transmissions along a single beam direction can be determined based on a signal that was transmitted in one or more beam directions. For example, a UE 115 can receive one or more of the signals transmitted by the base station 105 in different directions and can report to the base station 105 an indication of the signal that the UE 115 received with a highest signal quality, or an otherwise acceptable signal quality.

[0113] In some examples, transmissions by a device (e.g., by a base station 105 or a UE 115) can be performed using multiple beam directions, and the device can use a combination of digital precoding or radio frequency beamforming to generate a combined beam for transmission (e.g., from a base station 105 to a UE 115). A UE 115 can report feedback that indicates precoding weights for one or more beam directions, and the feedback can correspond to a configured number of beams across a system bandwidth or one or more sub-bands. A base station 105 can transmit reference signals (e.g., a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS)) that can be precoded or unprecoded. A UE 115 can provide feedback for beam selection, which can be a precoding matrix indicator (PMI) or codebook-based feedback (e.g., a multi-panel type codebook, a linear combination type codebook, a port selection type codebook). Although these techniques are described with reference to signals transmitted in one or more directions by a base station 105, a UE 115 can employ similar techniques for transmitting signals multiple times in different directions (e.g., for identifying a beam direction for subsequent transmission or reception by the UE 115) or for transmitting a signal in a single direction (e.g., for transmitting data to a receiving device).

[0114] A receiving device (e.g., a UE 115) can try multiple receive configurations (e.g., directional listening) when receiving various signals from base stations 105, such as synchronization signals, reference signals, beam selection signals, or other control signals. For example, a receiving device can try multiple receive directions by differentially rotating a polarization plane of an antenna over time, measuring for signals received in different receive directions, or any combination thereof. In some examples, the receiving device can use a single receive configuration to receive signals along a single beam direction (e.g., when receiving a data signal). The single receive configuration can be aligned in a beam direction determined based on listening in different receive directions (e.g., a beam direction determined to have a highest signal strength, highest signal-to-noise ratio (SNR), or otherwise acceptable signal quality based on listening in multiple beam directions).

[0115] Wireless communications system 100 can include RISs to extend communication coverage due to obstacles or blockages. For example, wireless communications system 100 can use RISs to reflect directional beams transmitted by base stations 105 so that base stations 105 can serve one or more UEs 115 that experience blocked paths or channels. If wireless communications system 100 supports the use of RISs, base stations 105 can perform different initial access procedures with UEs 115 based on whether UEs 115 support RISs. Such procedures can include base stations 105 transmitting SSBs to accommodate one or more RIS-supporting UEs 115 and one or more non-RIS-supporting UEs 115. For example, base stations 105 can transmit one or more SSBs on different synchronization raster for different types of UEs 115. Additionally or alternatively, base stations 105 can transmit different types of SSBs. UEs 115 can search for and receive one or more SSBs according to their capabilities, including their ability to support RISs and other factors.

[0116] Figure 2 An example of a wireless communications system 200 that supports transmitting one or more SSBs via one or more RISs is illustrated in accordance with one or more aspects of the present disclosure. In some examples, wireless communications system 200 can be implemented by or can implement aspects of wireless communications system 100 described with reference to Figure 1 Wireless communications system 200 can include UE 115-a and UE 115-b, which can be examples of UEs 115 as described with reference to Figure 1 Wireless communications system 200 can include UE 115-a and UE 115-b, which can be examples of UEs 115 as described with reference to Figure 1 In some examples, base station 105-a can communicate with UE 115-a or UE 115-b using directional communication techniques. For example, base station 105-a can communicate with UE 115-a or UE 115-b via one or more beams 205.

[0117] UE 115-a or UE 115-b can perform an initial access procedure to establish a connection with base station 105-a. Some initial access procedures can include UE 115-a or UE 115-b (or both) acquiring synchronization and system information from base station 105-a via one or more SSBs (e.g., transmitted on a PBCH). For example, base station 105-a can transmit (e.g., broadcast) one or more SSBs associated with beams 205. In some implementations, base station 105-a can transmit SSBs for each beam 205 using time division multiplexing techniques or using different frequency locations defined by a synchronization raster. UE 115-a or UE 115-b (or both) can receive at least one SSB based on which beam 205 UE 115-a or UE 115-b (or both) monitors. For example, UE 115-a can receive an SSB using beam 205-d, but can not monitor any of beams 205-a, 205-b, or 205-c.

[0118] In some examples, one or more beams 205 can be obstructed by an obstruction 220 such that base station 105-a can not be able to establish a connection with UE 115-b. To mitigate the effects of obstruction 220, wireless communications system 200 can include RIS 225. RIS 225 can reflect one or more beams 205 used by base station 105-a. For example, base station 105-a can transmit information using beam 205-a, beam 205-b, beam 205-c, or beam 205-d. In some examples, beams 205-c and 205-d can be obstructed by obstruction 220 and thus can not be used by base station 105-a to communicate with UE 115-b. However, beams 205-a and 205-b can not be obstructed by obstruction 220, but can be reflected by RIS 225 to produce reflected beams 210-a and 210-b. Reflected beams 210-a and 210-b can bypass obstruction 220 and thus can be used by base station 105-a to communicate with UE 115-b. In some examples, base station 105-a can communicate with RIS 225 via link 215. In some implementations, link 215 can be one-way, where base station 105-a can communicate with RIS 225, or link 215 can be two-way, where RIS 225 can also communicate with base station 105-a. Accordingly, base station 105-a can adjust a set of phase weights, positions, orientations, other factors, or any combination thereof of RIS 225 to change a direction of reflection of one or more beams 205. In some implementations, RIS 225 can be an example of a nearly passive device that exhibits relatively low power consumption.

[0119] In such cases where the wireless communications system 200 uses the RIS 225, the path or channel between the base station 105-a and the UE 115-b can be different than the path or channel between the base station 105-a and the UE 115-a. For example, the path or channel between the UE 115-b and the base station 105-a can include the RIS 225, while the path or channel between the UE 115-a and the base station 105-a can be direct. Due to the different paths or channels, the initial access procedure performed by the base station 105-a and the UE 115-a can be different than the initial access procedure performed by the base station 105-a and the UE 115-b. For example, as part of the one or more initial access procedures, the base station 105-a and the UE 115-a or the UE 115-b can distinguish between SSBs received by the UE 115-a and SSBs received by the UE 115-b.

[0120] In some examples, the base station 105-a can transmit SSBs using frequency locations defined by multiple synchronization raster. For example, the base station 105-a can transmit SSBs at frequency locations defined by a first synchronization raster for use by the UE 115-a, and can transmit SSBs at frequency locations defined by a second synchronization raster for use by the UE 115-b. In some implementations, the first synchronization raster and the second synchronization raster can be different (e.g., non-overlapping) such that frequency locations used in the first synchronization raster are not used in the second synchronization raster. Although described herein with reference to the UE 115-a and the UE 115-b, the SSBs transmitted using the first and second synchronization raster can not be unique to the UE 115-a or the UE 115-b, but can be received by any number of UEs 115 using a channel similar to one of the channels used by the UE 115-a or the UE 115-b. In some implementations, the base station 105-a can send an indication to the UE 115-a or the UE 115-b indicating the synchronization raster to monitor for SSBs. By transmitting SSBs using two synchronization rasters, the base station 105-a can enable the UE 115-a and the UE 115-b to determine whether a connection established with the base station 105-a uses the RIS 225, receive one or more SSBs that can include synchronization and system information, among other advantages.

[0121] In some examples, base station 105-a can transmit two types of SSBs. For example, base station 105-a can transmit a first type of SSB for use by UE 115-a and can transmit a second type of SSB for use by UE 115-b. In some implementations, base station 105-a, UE 115-a, or UE 115-b can distinguish between the first type of SSB and the second type of SSB by, for example, location (e.g., in time location, in frequency location) or synchronization order of reference signals associated with the SSBs.

[0122] In some implementations, base station 105-a can send a message (e.g., a message that can include a master information block (MIB)) to UE 115-a or UE 115-b (or both) indicating the type of SSB to use. For example, base station 105-a can transmit an indication in the MIB, where one value (e.g., bit value 0) indicates one type of SSB (e.g., the first type) and a different value (e.g., bit value 1) indicates another other type of SSB (e.g., the second type). In addition to or alternative to other techniques described herein, UE 115-a or UE 115-b (or both) can distinguish between the types of SSBs or can select the type of SSB to use based on receiving the indication. In some implementations, the indication can include any number of bits corresponding to multiple types of SSBs (e.g., can indicate one, two, or more types of SSBs).

[0123] Although described with reference to UE 115-a and UE 115-b, the two types of SSBs can not be unique to UE 115-a or UE 115-b, but can be used by any number of UEs 115 using a path or channel similar to one of the channels used by UE 115-a or UE 115-b (or both). By transmitting two types of SSBs, base station 105-a can enable UE 115-a or UE 115-b to determine whether a connection established with base station 105-a uses RIS 225, receive one or more SSBs that can include synchronization and system information, among other advantages. Implementing one or more aspects of the disclosure can enable wireless communications system 200 to support connections between base stations 105 and UEs 115 that support using RIS 225 as well as connections between base stations 105 and UEs 115 that do not support using RIS 225.

[0124] Figure 3 An example of a process flow 300 that supports transmitting one or more SSBs via one or more RISs is illustrated in accordance with one or more aspects of the present disclosure. In some examples, process flow 300 can be used by a base station 105 and / or UE 115, which can be examples of the corresponding devices described with reference to FIGs. 1-2. Figure 1 and 2Aspects of the described wireless communication systems 100 or 200 can implement or can be implemented in accordance with the techniques described herein, such as with reference to Figure 1 and 2 Aspects of the described wireless communication systems 100 or 200. The process flow 300 can include a UE 115-c, a UE 115-d, and a base station 105-b, which can be examples of corresponding devices as described herein. In some examples, the UE 115-c can experience a blocked path or channel between the UE 115-c and the base station 105-b, and the UE 115-d can experience an unblocked path or channel between the UE 115-d and the base station 105-b. Thus, the UE 115-c can be an example of a UE 115 that supports using a RIS to communicate with the base station 105-b. Similarly, the UE 115-d can be an example of a UE 115 that does not support using a RIS (e.g., a legacy UE 115). Alternative examples of the following can be implemented, where some processes are performed in a different order than described or not performed at all. In some implementations, the processes can include additional features not mentioned below, or further processes can be added.

[0125] In some examples, such as if the UE 115-c or the UE 115-d (or both) are operating in a connected mode (e.g., a radio resource control (RRC) connected mode), at 301, the base station 105-b can transmit one or more indications to the UE 115-c or the UE 115-d (or both). The base station 105-b can not transmit the one or more indications to the UE 115-c or the UE 115-d (or both) at 301 when one or both of the UE 115-c or the UE 115-d are in an RRC idle mode. In some implementations, the base station 105-b can transmit an indication of a synchronization raster that the UE 115-c or the UE 115-d (or both) are to use to receive SSBs. For example, the base station 105-b can indicate that the UE 115-c search a first or second synchronization raster for SSBs. Additionally or alternatively, the base station 105-b can transmit an indication that the second synchronization raster is to be used to receive SSBs when one or more RISs are used. The UE 115-c or the UE 115-d (or both) can determine to search the first or second synchronization raster based on receiving the indication that the second synchronization raster is associated with a RIS. In some examples, the base station 105-b can not transmit the indication if the UE 115-c or the UE 115-d (or both) are operating in an idle mode (e.g., an RRC non-connected or idle mode).

[0126] At 305, UE 115-c, UE 115-d, and base station 105-b can identify a first synchronization raster and a second synchronization raster for transmitting or receiving SSBs. In some implementations, the first synchronization raster (i.e., raster 0) can be used by UEs 115 that experience unblocked channels between the UE 115 and the base station 105. Similarly, the second raster (i.e., raster 1) can be used by UEs 115 that can establish a connection with a base station 105 using RIS in the presence of a blocked path or channel between the UE 115 and the base station 105. In some implementations, UE 115-c can be capable of or configured to use both the first and second synchronization rasters, but UE 115-d can be capable of or configured to use only the first synchronization raster. In some implementations, the first and second synchronization rasters can be non-overlapping, such that if a frequency location is used in the first synchronization raster, the same frequency location is not used in the second synchronization raster. In some implementations, the first and second synchronization rasters can be preconfigured, such that the UEs 115 can have the first and second synchronization rasters stored or otherwise capable of being referenced. In some implementations, the base station 105 can transmit (e.g., broadcast) SSBs on one or both of the synchronization rasters.

[0127] At 310, UE 115-d can scan (e.g., monitor) one or more frequency locations in the first synchronization raster for SSBs. Similarly, at 315, UE 115-c can scan one or more frequency locations in the first synchronization raster. In some examples, UE 115-c or UE 115-d (or both) can search some or all of the frequency locations in the first synchronization raster. For example, UE 115-c or UE 115-d (or both) can search a subset of the frequency locations in the raster based on a pattern. In some examples, UE 115-c or UE 115-d (or both) can search the frequency locations until an SSB is found or all of the frequency locations are scanned. In some examples, UE 115-c can select the first or second synchronization raster for an initial search based on a priority associated with the synchronization raster. For example, UE 115-c can determine (e.g., based on a pre-configuration, signaling received from base station 105-b, etc.) that the first synchronization raster has a higher priority than the second synchronization raster. Accordingly, UE 115-c can search the first synchronization raster before searching the second synchronization raster. Alternatively, UE 115-c can determine that the second synchronization raster has a higher priority than the first synchronization raster and select the raster to search accordingly.

[0128] At 320, UE 115-d can detect an SSB transmitted by base station 105-b at a frequency location defined in the first synchronization raster. At 330, UE 115-d can communicate with base station 105-b in response to receiving the SSB at the frequency location in the first synchronization raster.

[0129] At 325, the UE 115-c can fail to detect an SSB at one or more frequency locations in the first raster. In some examples, the UE 115-c can fail to detect an SSB on the first synchronization raster due to an obstruction in the path or channel between the UE 115-c and the base station 105-b.

[0130] At 335, in response to failing to detect an SSB on the first synchronization raster, the UE 115-c can scan one or more frequency locations in the second synchronization raster. At 340, the UE 115-c can detect an SSB transmitted by the base station 105-b at a frequency location in the second synchronization raster. In some examples, the UE 115-c can detect an SSB on the first synchronization raster. In such examples, the UE 115-c can refrain from scanning the frequency locations in the second synchronization raster.

[0131] At 345, the UE 115-c can communicate with the base station 105-b in response to receiving the SSB. Implementing aspects of the process flow 300 can allow a wireless communications system to support initial access procedures for UEs 115 that support use of RIS and UEs 115 that do not support use of RIS.

[0132] Figure 4 An example of a process flow 400 that supports transmitting one or more SSBs via one or more RISs is illustrated in accordance with one or more aspects of the present disclosure. In some examples, process flow 400 can be implemented by or with aspects of the wireless communications system 100 or 200, process flow 300, or any combination thereof, as described with reference to Figures 1-3 Aspects of the wireless communications system 100 or 200, process flow 300, or any combination thereof, as described with reference to Figures 1-3 Process flow 400 can include a UE 115-e, a UE 115-f, and a base station 105-c, which can be examples of the corresponding devices as described herein. In some examples, the UE 115-e can experience a blocked path or channel between the UE 115-e and the base station 105-c, and the UE 115-f can experience an unblocked path or channel between the UE 115-f and the base station 105-c. Thus, the UE 115-c can be an example of a UE 115 that supports use of RIS to communicate with the base station 105-b. Similarly, the UE 115-d can be an example of a UE 115 that does not support use of RIS (e.g., a legacy UE 115). Alternative examples of the following can be implemented where some processes are performed in a different order than described or are not performed at all. In some implementations, the processes can include additional features not mentioned below, or further processes can be added.

[0133] In some examples, at 401, the base station 105-c can transmit an indication to the UE 115-e or the UE 115-f (or both) indicating a type of SSB to use. For example, the base station 105-c can transmit an indication to the UE 115-e or the UE 115-f (or both) indicating that the UE 115 is to search for a first type or a second type of SSB. The UE 115-e or the UE 115-f (or both) can determine a type of SSB to monitor for a synchronization raster based on receiving the indication. In some implementations, the base station 105-c can transmit the indication in a MIB. For example, the base station 105-c can use one or more bits in the MIB to indicate the type of SSB, where one value can indicate the first type of SSB and a different value can indicate the second type of SSB.

[0134] At 405, the UE 115-e, the UE 115-f, and the base station 105-c can identify a first type of SSB and a second type of SSB to use in an initial access procedure. In some implementations, the first type of SSB (i.e., Type 0) can be used by a UE 115 that experiences an unblocked path or channel between the UE 115 and the base station 105. Similarly, the second type of SSB (i.e., Type 1) can be used by a UE 115 that can establish a connection with the base station 105 using a RIS in a case where there is a blocked path or channel between the UE 115 and the base station 105. In some implementations, the UE 115-c can be capable of using both the first type and the second type of SSB, but the UE 115-d can only use the first type of SSB. In some implementations, the first type and the second type of SSB can differ in a location (i.e., in time or frequency location), order, etc. of synchronization or reference signals associated with the SSB. In some implementations, the first type and the second type of SSB can be transmitted (e.g., broadcast) by the base station 105 using the same synchronization raster.

[0135] At 410, UE 115-f can scan (e.g., monitor) the frequency locations on the synchronization raster for the first type of SSB. Similarly, at 415, UE 115-e can scan the synchronization raster for the first type of SSB. In some examples, UE 115-e or UE 115-d (or both) can search some or all of the frequency locations in the synchronization raster for the first type of SSB. For example, UE 115-e or UE 115-d (or both) can search a subset of the frequency locations in the raster based on a pattern, or can search each frequency location until an SSB is found or scan all of the frequency locations. In some implementations, UE 115-e can search all of the frequency locations in the synchronization raster for the first type of SSB before searching for the second type of SSB. Alternatively, UE 115-e can search each frequency location for both the first type of SSB and the second type of SSB (if UE 115-e does not detect the first type of SSB). In some examples, UE 115-e can select one type of SSB to search for initially based on a priority associated with the first and second types of SSBs. For example, UE 115-e can determine (e.g., based on a pre-configuration, signaling received from base station 105-c, etc.) that the first type of SSB has a higher priority than the second type of SSB and, accordingly, can search for the first type of SSB before searching for the second type of SSB. Alternatively, UE 115-e can determine that the second type of SSB has a higher priority than the first type of SSB and select one type of SSB for searching accordingly.

[0136] At 420, UE 115-f can detect the first type of SSB transmitted by base station 105-c. At 430, UE 115-f can communicate with base station 105-c in response to receiving the first type of SSB.

[0137] At 425, UE 115-e can fail to detect the first type of SSB due to experiencing a blocked channel between UE 115-e and base station 105-c. At 435, in response to failing to detect the first type of SSB, UE 115-e can search the frequency locations in the synchronization raster for the second type of SSB. In some implementations, UE 115-e can search at least a subset (if not all) of the frequency locations in the synchronization raster for the first type of SSB before searching for the second type of SSB. In some implementations, UE 115-e can search a frequency location in the synchronization raster for both the first and second types of SSBs before searching other frequency locations in the synchronization raster.

[0138] At 440, UE 115-e can detect a second type of SSB transmitted by base station 105-c in the synchronization raster. At 445, UE 115-e can communicate with base station 105-c in response to receiving the second type of SSB. Implementing aspects of process flow 400 can allow a wireless communications system to support initial access procedures for UEs 115 that support use of RIS and UEs 115 that do not support use of RIS.

[0139] Figure 5A and Figure 5B Example resource mapping schemes 500-a and 500-b that support transmission of one or more SSBs via one or more RIS are illustrated in accordance with one or more aspects of the present disclosure. In some examples, resource mapping schemes 500-a and 500-b can be implemented by or implemented with aspects of wireless communications systems 100 or 200, process flows 300 or 400, or any combination thereof, as described with reference to Figures 1-4 wireless communications systems 100 or 200, process flows 300 or 400, or any combination thereof, as described with reference to Figures 1-4 wireless communications systems 100 or 200, process flows 300 or 400, or any combination thereof, as described with reference to

[0140] Figure 5A An example of resource mapping scheme 500-a is illustrated, which can correspond to a first type of SSB (i.e., a Type 0 SSB). In the example of Figure 5A In some examples, the PSS can be mapped to resource elements that are located earlier in time than resource elements associated with a PBCH DMRS, an SSS, and / or the like.

[0141] Figure 5B An example of resource mapping scheme 500-b is illustrated, which can correspond to a second type of SSB (i.e., a Type 1 SSB). In the example of Figure 5B In some examples, the PSS can be mapped to resource elements that are located later in time than resource elements associated with a PBCH DMRS, an SSS, and / or the like. Accordingly, in some implementations, Type 0 SSBs can be distinguished from Type 1 SSBs based on a location of a PSS associated with the SSBs. For example, any combination of a UE 115 or a base station 105 can identify a first type and a second type of SSB based on determining a location (e.g., a temporal location) of a PSS in each type of SSB.

[0142] In some examples, such as examples where a wireless communication system uses RIS, a base station 105 can transmit one or two types of SSBs to a UE 115. UEs 115 that do not support use of RIS (e.g., legacy UEs) can search for and receive the first type of SSB. UEs 115 that support use of RIS or are using RIS can search for and receive the second type of SSB. Thus, each type of UE 115 can receive SSBs based on the capabilities of the UE 115 and can determine whether RIS is being used based on the type of SSBs received by the UE 115.

[0143] Figure 6A and Figure 6B Example resource mapping schemes 600-a and 600-b that support transmitting one or more SSBs via one or more RISs are illustrated in accordance with one or more aspects of the present disclosure. In some examples, resource mapping schemes 600-a and 600-b can be implemented by or implemented with aspects of the wireless communication system 100 or 200, process flows 300 or 400, resource mapping schemes 500-a or 500-b, or any combination thereof, as described with reference to Figure 1 -5. In some examples, resource mapping schemes 600-a and 600-b can be implemented by or implemented with aspects of the wireless communication system 100 or 200, process flows 300 or 400, resource mapping schemes 500-a or 500-b, or any combination thereof, as described with reference to Figure 1 -5. In some examples, resource mapping schemes 600-a and 600-b can be implemented by or implemented with aspects of the wireless communication system 100 or 200, process flows 300 or 400, resource mapping schemes 500-a or 500-b, or any combination thereof, as described with reference to

[0144] Figure 6A An example of resource mapping scheme 600-a is illustrated, which can correspond to a first type of SSB (i.e., a Type 0 SSB). In the example of resource mapping scheme 600-a, a first mapping order can be used to map SSSs associated with the SSB onto resource elements. For example, a sequence associated with the SSSs can be mapped onto the resource elements in an order that is increasing in frequency. Figure 6A An example of resource mapping scheme 600-a is illustrated, which can correspond to a first type of SSB (i.e., a Type 0 SSB). In the example of resource mapping scheme 600-a, a first mapping order can be used to map SSSs associated with the SSB onto resource elements. For example, a sequence associated with the SSSs can be mapped onto the resource elements in an order that is increasing in frequency.

[0145] Figure 6B An example of resource mapping scheme 600-b is illustrated, which can correspond to a second type of SSB (i.e., a Type 1 SSB). In the example of resource mapping scheme 600-b, a second mapping order can be used to map SSSs associated with the SSB onto resource elements. For example, a sequence associated with the SSSs can be mapped onto the resource elements in an order that is increasing in frequency. Figure 6BIn the example of FIG. 6, the SSS associated with the SSB can be mapped onto the resource elements using a second mapping order. For example, the sequence associated with the SSS can be mapped onto the resource elements in a frequency-decreasing order. Although described with respect to a frequency-increasing or decreasing order, the first and second mapping orders can include additional mapping orders (e.g., other mapping directions) or patterns (e.g., alternating, repeating, etc.). In some implementations, the type 0 SSB can be distinguished from the type 1 SSB based on the mapping order of the SSS associated with the SSB. For example, any combination of the UE 115 or base station 105 can identify the first and second types of SSBs based on determining the mapping order of the SSS in each type of SSB.

[0146] In some examples, such as examples in which the wireless communications system uses one or more RISs, the base station 105 can transmit one or two types of SSBs to the UE 115. UEs 115 that do not support the use of RISs (e.g., legacy UEs) can search for and receive the first type of SSB. UEs 115 that support the use of RISs or are using RISs can search for and receive the second type of SSB. Thus, each type of UE 115 can receive SSBs based on the capabilities of the UE 115 and can determine whether RISs are being used based on the type of SSBs received by the UE 115.

[0147] Figure 7A and Figure 7B Example resource mapping schemes 700-a and 700-b that support transmitting one or more SSBs via one or more RISs are illustrated in accordance with one or more aspects of the present disclosure. In some examples, the resource mapping schemes 700-a and 700-b can be implemented by or implemented with aspects of the wireless communications system 100 or 200, process flows 300 or 400, resource mapping schemes 500-a, 500-b, 600-a, 600-b, or any combination thereof, as described with reference to Figure 1 -6, process flows 300 or 400, resource mapping schemes 500-a, 500-b, 600-a, 600-b, or any combination thereof, as described with reference to Figure 1 -6, process flows 300 or 400, resource mapping schemes 500-a, 500-b, 600-a, 600-b, or any combination thereof, as described with reference to In some examples, the resource mapping schemes 700-a and 700-b can be implemented by a UE 115, base station 105, or any combination thereof. In some implementations, the sequence associated with the DMRS for the PBCH transmission can be scaled to conform to the PBCH power allocation and mapped onto the time / frequency resources in a frequency-increasing order.

[0148] Figure 7A An example of the resource mapping scheme 700-a is illustrated in accordance with a first type of SSB (i.e., a type 0 SSB). In the example of FIG. 7, the SSS associated with the SSB can be mapped onto the resource elements using a second mapping order. For example, the sequence associated with the SSS can be mapped onto the resource elements in a frequency-decreasing order. Although described with respect to a frequency-increasing or decreasing order, the first and second mapping orders can include additional mapping orders (e.g., other mapping directions) or patterns (e.g., alternating, repeating, etc.). In some implementations, the type 0 SSB can be distinguished from the type 1 SSB based on the mapping order of the SSS associated with the SSB. For example, any combination of the UE 115 or base station 105 can identify the first and second types of SSBs based on determining the mapping order of the SSS in each type of SSB. Figure 7AIn examples of the first mapping order, a DMRS for a PBCH transmission can be mapped onto resource elements using the first mapping order. For example, a sequence associated with the DMRS can be mapped onto resource elements in an order of increasing frequency and increasing time.

[0149] Figure 7B Examples of the resource mapping scheme 700-b illustrate a second type of SSB (i.e., a Type 1 SSB). In examples of the second mapping order, a DMRS for a PBCH transmission can be mapped onto resource elements using the second mapping order. For example, a sequence associated with the DMRS can be mapped onto resource elements in an order of increasing frequency and decreasing time. Although described with respect to an order of increasing or decreasing time, the first and second mapping orders can include additional mapping orders (e.g., other mapping directions) or patterns (e.g., alternating, repeating, etc.). In some implementations, a Type 0 SSB can be distinguished from a Type 1 SSB based on a mapping order of a DMRS associated with the SSB. For example, any combination of the UE 115 or the base station 105 can identify the first and second types of SSBs based on determining a mapping order of the DMRS in each type of SSB. Figure 7B

[0150] In some examples, such as examples in which the wireless communications system uses one or more RISs, the base station 105 can transmit one or two types of SSBs to the UE 115. UEs 115 that do not support use of RIS (e.g., legacy UEs) can search for and receive the first type of SSB. UEs 115 that support use of RIS or are using RIS can search for and receive the second type of SSB. Thus, each type of UE 115 can receive SSBs based on capabilities of the UE 115 and can determine whether RIS is being used based on a type of SSB received by the UE 115.

[0151] Figure 8 FIG. 8 shows a block diagram of a device 805 that supports transmitting one or more SSBs via one or more RISs in accordance with aspects of the present disclosure. The device 805 can be an example of aspects of a UE 115 as described herein. The device 805 can include a receiver 810, a communications manager 815, and a transmitter 820. The device 805 can also include a processor. Each of these components can be in communication with one another (e.g., via one or more buses).

[0152] The receiver 810 can receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to transmitting SSBs via RIS, etc.). Information can be passed on to other components of the device 805. The receiver 810 can be a receiver as described with reference to FIG. 19. Figure 11 ​Examples of aspects of the described transceiver 1120. The receiver 810 may utilize a single antenna or a set of antennas.

[0153] The communication manager 815 may identify a first synchronization raster and a second synchronization raster for the UE to receive one or more SSBs, the second synchronization raster including a frequency location associated with a RIS; monitor one or more resource elements based on one or more of the first synchronization raster or the second synchronization raster for the one or more SSBs; and receive at least one SSB based on monitoring the one or more resource elements. The communication manager 815 may also identify a first type of SSB and a second type of SSB associated with the same synchronization raster for the UE to receive, wherein the second type of SSB is associated with a RIS; monitor one or more resource elements for one or more SSBs including one or more of the first type of SSB or the second type of SSB; and receive at least one SSB of the first type or the second type based on monitoring the one or more resource elements. The communication manager 815 may be an example of aspects of the communication manager 1110 described herein.

[0154] The communication manager 815 or its subcomponents may be implemented in hardware, in code executed by a processor (e.g., software or firmware), or any combination thereof. If implemented in code executed by a processor, the functions of the communication manager 815 or its subcomponents may be performed by a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device designed to perform the functions described in this disclosure, discrete gate or transistor logic, discrete hardware components, or any combination thereof.

[0155] The communication manager 815 or its subcomponents can be physically located at various locations, including being distributed such that portions of the functionality are implemented by one or more physical components at different physical locations. In some examples, according to various aspects of the present disclosure, the communication manager 815 or its subcomponents can be separate and distinct components. In some examples, according to various aspects of the present disclosure, the communication manager 815 or its subcomponents can be combined with one or more other hardware components, including but not limited to input / output (I / O) components, a transceiver, a network server, another computing device, one or more other components described in the present disclosure, or a combination thereof.

[0156] The transmitter 820 may transmit signals generated by other components of the device 805. In some examples, the transmitter 820 may be co-located with the receiver 810 in a transceiver module. For example, the transmitter 820 may be a reference Figure 11 Examples of aspects of the described transceiver 1120. The transmitter 820 may utilize a single antenna or a set of antennas.

[0157] In some examples, the communications manager 815 can be implemented as an integrated circuit or chipset for a mobile device modem, and the receiver 810 and transmitter 820 can be implemented as analog components (e.g., amplifiers, filters, antennas) coupled with the mobile device modem to enable wireless transmission and reception over one or more frequency bands.

[0158] The described communications manager 815 can be implemented to realize one or more potential advantages. One implementation can allow a device 805 to receive SSBs according to the capabilities of the device 805. Based on the techniques for receiving SSBs, the device 805 can support obtaining accurate channel information for a channel between the device 805 and another device. As such, the device 805 can exhibit improved reliability, improved data reliability, and reduced latency, among other benefits.

[0159] Figure 9 A block diagram 900 of a device 905 that supports transmitting one or more SSBs via one or more RIS in accordance with aspects of the present disclosure is shown. The device 905 can be an example of aspects of a device 805 or a UE 115 as described herein. The device 905 can include a receiver 910, a communications manager 915, and a transmitter 940. The device 905 can also include a processor. Each of these components can be in communication with one another (e.g., via one or more buses).

[0160] The receiver 910 can receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to transmitting SSBs via RIS, etc.). Information can be passed on to other components of the device 905. The receiver 910 can be Figure 11 The described aspects of the transceiver 1120. The receiver 910 can utilize a single antenna or a set of antennas.

[0161] The communications manager 915 can be an example of aspects of the communications manager 815 as described herein. The communications manager 915 can include a synchronization raster manager 920, a resource monitor 925, an SSB receiver 930, and a type manager 935. The communications manager 915 can be an example of aspects of the communications manager 1110 described herein.

[0162] The synchronization raster manager 920 can identify a first synchronization raster and a second synchronization raster for the UE to use to receive one or more SSBs, the second synchronization raster including a frequency location associated with a RIS.

[0163] The resource monitor 925 may monitor one or more resource elements based on one or more of the first synchronization raster or the second synchronization raster for the one or more SSBs.

[0164] The SSB receiver 930 may receive at least one SSB based on monitoring the one or more resource elements.

[0165] The type manager 935 may identify a first type of SSB and a second type of SSB that are associated with the same synchronization raster and are received by the UE, wherein the second type of SSB is associated with the RIS.

[0166] The resource monitor 925 may monitor one or more resource elements for one or more SSBs including one or more of the first type of SSB or the second type of SSB.

[0167] The SSB receiver 930 may receive at least one SSB of the first type or the second type based on monitoring the one or more REs.

[0168] The transmitter 940 may transmit signals generated by other components of the device 905. In some examples, the transmitter 940 may be co-located with the receiver 910 in a transceiver module. For example, the transmitter 940 may be a reference Figure 11 Examples of aspects of the described transceiver 1120. The transmitter 940 may utilize a single antenna or a set of antennas.

[0169] Figure 10 A block diagram 1000 is shown of a communication manager 1005 that supports transmission of one or more SSBs via one or more RISs in accordance with aspects of the present disclosure. The communication manager 1005 can be an example of aspects of the communication manager 815, the communication manager 915, or the communication manager 1110 described herein. The communication manager 1005 can include a synchronization grid manager 1010, a resource monitor 1015, an SSB receiver 1020, a priority manager 1025, a grid indication receiver 1030, a RIS indication receiver 1035, a type manager 1040, and a type indication receiver 1045. Each of these modules can communicate with each other directly or indirectly (e.g., via one or more buses).

[0170] The synchronization raster manager 1010 may identify a first synchronization raster and a second synchronization raster for the UE to use for receiving one or more SSBs, the second synchronization raster including frequency locations associated with the RIS. In some examples, the synchronization raster manager 1010 may identify a first set of frequency locations in the first synchronization raster and a second set of frequency locations in the second synchronization raster, the second set of frequency locations in the second synchronization raster not overlapping with the first set of frequency locations in the first synchronization raster.

[0171] The resource monitor 1015 can monitor one or more resource elements for the one or more SSBs based on one or more of the first synchronization raster or the second synchronization raster.

[0172] In some examples, the resource monitor 1015 can monitor one or more resource elements for one or more SSBs including one or more of a first type of SSB or a second type of SSB.

[0173] In some examples, the resource monitor 1015 can scan one or more frequency locations in the first synchronization raster for the one or more SSBs. In some examples, the resource monitor 1015 can fail to detect the one or more SSBs at the one or more frequency locations in the first synchronization raster. In some examples, the resource monitor 1015 can scan one or more frequency locations in the second synchronization raster for the one or more SSBs, where receiving the at least one SSB is based on scanning the one or more frequency locations in the second synchronization raster.

[0174] In some examples, the resource monitor 1015 can scan one or more frequency locations in the first synchronization raster for the one or more SSBs, where receiving the at least one SSB is based on scanning the one or more frequency locations in the first synchronization raster.

[0175] In some examples, the resource monitor 1015 can refrain from scanning one or more frequency locations in the second synchronization raster based on receiving the at least one SSB at the one or more frequency locations in the first synchronization raster.

[0176] In some examples, the resource monitor 1015 can scan a first frequency location in a synchronization raster for a first type of SSB. In some examples, the resource monitor 1015 can fail to detect the first type of SSB at the first frequency location. In some examples, the resource monitor 1015 can scan the first frequency location in the synchronization raster for a second type of SSB, where receiving the at least one SSB includes receiving the second type of SSB based on scanning the first frequency location.

[0177] In some examples, the resource monitor 1015 can scan each frequency location in a synchronization raster for a first type of SSB. In some examples, the resource monitor 1015 can fail to detect the first type of SSB at each frequency location in the synchronization raster.

[0178] In some examples, the resource monitor 1015 can scan one or more frequency locations in the synchronization raster for a second type of SSB, where receiving the at least one SSB includes receiving the second type of SSB based on scanning the one or more frequency locations.

[0179] In some examples, the resource monitor 1015 can scan at least one frequency location in the synchronization raster for a first type of SSB, where receiving the at least one SSB includes receiving the first type of SSB based on scanning the at least one frequency location.

[0180] The SSB receiver 1020 can receive at least one SSB based on monitoring the one or more resource elements. In some examples, the SSB receiver 1020 can receive at least one SSB of a first type or a second type based on monitoring the one or more REs.

[0181] The type manager 1040 can identify a first type of SSB and a second type of SSB associated with a same synchronization raster and for reception by the UE, where the second type of SSB is associated with an RIS.

[0182] In some examples, the type manager 1040 can identify a first location of a primary synchronization signal associated with the first type of SSB and a second location of a primary synchronization signal associated with the second type of SSB. In some examples, the type manager 1040 can identify a first time location of a primary synchronization signal associated with the first type of SSB and a second time location of a primary synchronization signal associated with the second type of SSB.

[0183] In some examples, the type manager 1040 can identify a first mapping order of a secondary synchronization signal associated with the first type of SSB and a second mapping order of a secondary synchronization signal associated with the second type of SSB.

[0184] In some examples, the type manager 1040 can identify a first increasing mapping order of a secondary synchronization signal associated with the first type of SSB and a second decreasing mapping order of a secondary synchronization signal associated with the second type of SSB.

[0185] In some examples, the type manager 1040 can identify a first decreasing mapping order of a secondary synchronization signal associated with the first type of SSB and a second increasing mapping order of a secondary synchronization signal associated with the second type of SSB.

[0186] In some examples, the type manager 1040 can identify a first mapping order of a demodulation reference signal associated with the first type of SSB and a second mapping order of a demodulation reference signal associated with the second type of SSB.

[0187] In some examples, the type manager 1040 can identify a first increasing mapping order of demodulation reference signals associated with the first type of SSB and a second decreasing mapping order of demodulation reference signals associated with the second type of SSB.

[0188] In some examples, the type manager 1040 can identify a first decreasing mapping order of demodulation reference signals associated with the first type of SSB and a second increasing mapping order of demodulation reference signals associated with the second type of SSB.

[0189] In some cases, the first mapping order and the second mapping order each include an order for mapping a sequence of symbols associated with a secondary synchronization signal onto one or more resource elements. In some cases, the first mapping order and the second mapping order each include an order for mapping a sequence of symbols associated with a demodulation reference signal onto one or more resource elements.

[0190] In some examples, the priority manager 1025 can determine that a priority associated with a first type of SSB is different than a priority associated with a second type of SSB, where monitoring the one or more resource elements is based on the determination. In some examples, the priority manager 1025 can determine that a priority associated with a first type of SSB is higher than a priority associated with a second type of SSB. In some examples, the priority manager 1025 can determine that a priority associated with a first type of SSB is lower than a priority associated with a second type of SSB.

[0191] The raster indication receiver 1030 can receive, from a base station, an indication of one of the first synchronization raster or the second synchronization raster that the UE is to use to receive one or more SSBs, where monitoring the one or more resource elements is based on receiving the indication.

[0192] The RIS indication receiver 1035 can receive, from the base station, an indication that the second synchronization raster is associated with a RIS, where the UE uses one or both of the first synchronization raster or the second synchronization raster based on receiving the indication that the second synchronization raster is associated with the RIS and whether the UE is capable of interacting with the RIS.

[0193] The type indication receiver 1045 can receive, from a base station, an indication of one of the first type of SSB or the second type of SSB, where monitoring the one or more resource elements is based on receiving the indication. In some examples, the type indication receiver 1045 can receive, from the base station, a master information block including the indication.

[0194] Figure 11A diagram illustrating a system 1100 including a device 1105 that supports transmitting one or more SSBs via one or more RIS in accordance with aspects of the present disclosure is shown. The device 1105 can be an example of or include the components of device 805, device 905, or a UE 115 as described herein. The device 1105 can include components for bi-directional voice and data communications including components for transmitting and receiving communications, including a communications manager 1110, an I / O controller 1115, a transceiver 1120, an antenna 1125, memory 1130, and a processor 1140. These components can be in electronic communication via one or more buses (e.g., bus 1145).

[0195] The communications manager 1110 can identify a first synchronization raster and a second synchronization raster for the UE to use to receive one or more SSBs, the second synchronization raster including a frequency location associated with a RIS, monitor one or more resource elements for the one or more SSBs based on one or more of the first synchronization raster or the second synchronization raster, receive at least one SSB based on monitoring the one or more resource elements. The communications manager 1110 can also identify a first type of SSB and a second type of SSB associated with a same synchronization raster and for the UE to receive, where the second type of SSB is associated with a RIS, monitor one or more resource elements for one or more SSBs including one or more of the first type of SSB or the second type of SSB, and receive at least one SSB of the first type or the second type based on monitoring the one or more REs.

[0196] The I / O controller 1115 can manage input and output signals for the device 1105. The I / O controller 1115 can also manage peripherals not integrated with the device 1105. In some cases, the I / O controller 1115 can represent a physical connection or port to the external peripherals. In some cases, the I / O controller 1115 can utilize an operating system such as iOS®, ANDROID®, or another known operating system. In other cases, the I / O controller 1115 can represent or interact with a modem, a keyboard, a mouse, a touchscreen, or a similar device. In some cases, the I / O controller 1115 can be implemented as part of a processor. In some cases, a user can interact with the device 1105 via the I / O controller 1115 or via hardware components controlled by the I / O controller 1115.

[0197] The transceiver 1120 can communicate bi-directionally, via one or more antennas, wired, or wireless links as described above. For example, the transceiver 1120 can represent a wireless transceiver and can communicate bi-directionally with another wireless transceiver. The transceiver 1120 can also include a modem to modulate the packets and provide the modulated packets to the antennas for transmission, and to demodulate packets received from the antennas.

[0198] In some cases, the wireless device can include a single antenna 1125. However, in some cases the device can have more than one antenna 1125, which can be capable of concurrently transmitting or receiving multiple wireless transmissions.

[0199] The memory 1130 can include random access memory (RAM) and read-only memory (ROM). The memory 1130 can store computer-readable, computer-executable code 1135 including instructions that, when executed, cause the processor to perform various functions described herein. In some cases, the memory 1130 can contain, among other computer-readable or computer- executable instructions, a basic I / O system (BIOS), which can control basic hardware or software operation such as the interaction with peripheral components or devices.

[0200] The processor 1140 can include an intelligent hardware device, (e.g., a general- purpose processor, a DSP, a central processing unit (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 1140 can be configured to operate a memory array using a memory controller. In other cases, a memory controller can be integrated into the processor 1140. The processor 1140 can be configured to execute computer-readable instructions stored in a memory (e.g., the memory 1130) to cause the device 1105 to perform various functions (e.g., functions or tasks supporting transmission of SSBs via a RIS).

[0201] The code 1135 can include instructions to implement aspects of the present disclosure, including instructions to support wireless communications. The code 1135 can be stored in a non-transitory computer-readable medium such as system memory or other type of memory. In some cases, the code 1135 can not be directly executable by the processor 1140 but can cause a computer (e.g., when compiled and executed) to perform functions described herein.

[0202] Figure 12An apparatus 1205 that supports transmitting one or more SSBs via one or more RISs in accordance with aspects of the present disclosure is shown in block diagram 1200. The apparatus 1205 can be an example of aspects of a base station 105 as described herein. The apparatus 1205 can include a receiver 1210, a communications manager 1215, and a transmitter 1220. The apparatus 1205 can also include a processor. Each of these components can be in communication with one another (e.g., via one or more buses).

[0203] The receiver 1210 can receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to transmitting SSBs via RIS, etc.). Information can be passed on to other components of the device 1205. The receiver 1210 can be an example of aspects of the transceiver 1520 described with reference to FIG. 15. The receiver 1210 can utilize a single antenna or a set of antennas. Figure 15 The described aspects of the transceiver 1520. The receiver 1210 can utilize a single antenna or a set of antennas.

[0204] The communications manager 1215 can identify a first synchronization raster and a second synchronization raster for the base station to use for transmitting one or more SSBs, the second synchronization raster including a frequency location associated with a RIS, configure one or more resource elements to transmit the one or more SSBs based on the first synchronization raster and the second synchronization raster, and transmit the one or more SSBs using the configured one or more REs. The communications manager 1215 can also identify a first type of SSB and a second type of SSB associated with a same synchronization raster and for the base station to transmit, where the second type of SSB is associated with a reconfigurable intelligent surface, configure one or more resource elements to transmit one or more SSBs including one or more of the first type of SSB or the second type of SSB, and transmit the one or more SSBs using the configured one or more resource elements. The communications manager 1215 can be an example of aspects of the communications manager 1510 described herein.

[0205] The communications manager 1215, or its sub-components, can be implemented in hardware, code (for example, software or firmware) executed by a processor, or any combination thereof. If implemented in code executed by a processor, the functions of the communications manager 1215, or its sub-components can be executed by a general-purpose processor, a DSP, an application-specific integrated circuit (ASIC), a 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.

[0206] The communications manager 1215, or its sub-components, can be physically located in various locations, including being distributed so that functions of one or more components are implemented at different physical locations. In some examples, the communications manager 1215, or its sub-components, can be a separate and distinct component in accordance with various aspects of the present disclosure. In some examples, the communications manager 1215, or its sub-components, can be combined with one or more other hardware components, including but not limited to an input / output (I / O) component, a transceiver, a network server, another computing device, one or more other components described in the present disclosure, or a combination thereof in accordance with various aspects of the present disclosure.

[0207] The transmitter 1220 can transmit signals generated by other components of the device 1205. In some examples, the transmitter 1220 can be collocated with a receiver 1210 in a transceiver module. For example, the transmitter 1220 can be an example of aspects of the transceiver 1520 described with reference to Figure 15 The transmitter 1220 can transmit signals generated by other components of the device 1205. In some examples, the transmitter 1220 can be collocated with a receiver 1210 in a transceiver module. For example, the transmitter 1220 can be an example of aspects of the transceiver 1520 described with reference to

[0208] Figure 13 A block diagram 1300 of a device 1305 that supports transmitting one or more SSBs via one or more RISs in accordance with aspects of the present disclosure is shown. The device 1305 can be an example of aspects of a device 1205 or a base station 105 as described herein. The device 1305 can include a receiver 1310, a communications manager 1315, and a transmitter 1340. The device 1305 can also include a processor. Each of these components can be in communication with one another (e.g., via one or more buses).

[0209] The receiver 1310 can receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to transmitting SSBs via RIS, etc.). Information can be passed on to other components of the device 1305. The receiver 1310 can be an example of aspects of the transceiver 1520 described with reference to Figure 15 The receiver 1310 can receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to transmitting SSBs via RIS, etc.). Information can be passed on to other components of the device 1305. The receiver 1310 can be an example of aspects of the transceiver 1520 described with reference to

[0210] The communications manager 1315 can be an example of aspects of the communications manager 1215 as described herein. The communications manager 1315 can include a synchronization raster manager 1320, a resource component 1325, a SSB transmitter 1330, and a type manager 1335. The communications manager 1315 can be an example of aspects of the communications manager 1510 described herein.

[0211] The synchronization raster manager 1320 can identify a first synchronization raster and a second synchronization raster for the base station to use to transmit one or more SSBs, the second synchronization raster including a frequency location associated with a RIS.

[0212] The resource component 1325 can configure one or more resource elements to transmit the one or more SSBs based on the first synchronization raster and the second synchronization raster.

[0213] The SSB transmitter 1330 can transmit the one or more SSBs using the configured one or more REs.

[0214] The type manager 1335 can identify a first type of SSB and a second type of SSB associated with a same synchronization raster and transmitted by the base station, where the second type of SSB is associated with a reconfigurable intelligent surface.

[0215] The resource component 1325 can configure one or more resource elements to transmit one or more SSBs including one or more of the first type of SSB or the second type of SSB.

[0216] The SSB transmitter 1330 can transmit the one or more SSBs using the configured one or more resource elements.

[0217] The transmitter 1340 can transmit signals generated by other components of the device 1305. In some examples, the transmitter 1340 can be collocated with the receiver 1310 in a transceiver module. For example, the transmitter 1340 can be an example of aspects of the transceiver 1520 described with reference to FIG. 15. The transmitter 1340 can utilize a single antenna or a set of antennas. Figure 15

[0218] Figure 14 A block diagram 1400 illustrating the communication manager 1405 in support of transmitting one or more SSBs via one or more RISs in accordance with aspects of the present disclosure is shown. The communication manager 1405 can be an example of aspects of the communication manager 1215, the communication manager 1315, or the communication manager 1510 described herein. The communication manager 1405 can include a synchronization raster manager 1410, a resource component 1415, an SSB transmitter 1420, a raster indication transmitter 1425, a type manager 1430, and a type indication transmitter 1435. Each of these modules can communicate, directly or indirectly, with one another (e.g., via one or more buses).

[0219] ​The synchronization raster manager 1410 can identify a first synchronization raster and a second synchronization raster for the base station to use to transmit one or more SSBs, the second synchronization raster including a frequency location associated with a RIS. In some examples, the synchronization raster manager 1410 can identify a first set of frequency locations in the first synchronization raster and a second set of frequency locations in the second synchronization raster, the second set of frequency locations in the second synchronization raster being non-overlapping with the first set of frequency locations in the first synchronization raster.

[0220] The resource component 1415 can configure one or more resource elements to transmit the one or more SSBs based on the first synchronization raster and the second synchronization raster. In some examples, the resource component 1415 can configure one or more resource elements to transmit one or more SSBs including one or more of a first type of SSB or a second type of SSB.

[0221] In some examples, the resource component 1415 can configure resource elements at one or more frequency locations in the first synchronization raster. In some examples, the resource component 1415 can configure resource elements at one or more frequency locations in the second synchronization raster; where transmitting the one or more SSBs includes transmitting the one or more SSBs using the resource elements at the one or more frequency locations in the first synchronization raster and the resource elements at the one or more frequency locations in the second synchronization raster.

[0222] The SSB transmitter 1420 can transmit the one or more SSBs using the configured one or more REs.

[0223] The type manager 1430 can identify a first type of SSB and a second type of SSB associated with a same synchronization raster and for the base station to transmit, where the second type of SSB is associated with a reconfigurable intelligent surface.

[0224] In some examples, the type manager 1430 can identify a first location of a primary synchronization signal associated with the first type of SSB and a second location of a primary synchronization signal associated with the second type of SSB. In some examples, the type manager 1430 can identify a first time location of a primary synchronization signal associated with the first type of SSB and a second time location of a primary synchronization signal associated with the second type of SSB.

[0225] In some examples, the type manager 1430 can identify a first mapping order of secondary synchronization signals associated with the first type of SSB and a second mapping order of secondary synchronization signals associated with the second type of SSB. In some examples, the type manager 1430 can identify a first increasing mapping order of secondary synchronization signals associated with the first type of SSB and a second decreasing mapping order of secondary synchronization signals associated with the second type of SSB. In some examples, the type manager 1430 can identify a first decreasing mapping order of secondary synchronization signals associated with the first type of SSB and a second increasing mapping order of secondary synchronization signals associated with the second type of SSB.

[0226] In some examples, the type manager 1430 can identify a first mapping order of demodulation reference signals associated with the first type of SSB and a second mapping order of demodulation reference signals associated with the second type of SSB. In some examples, the type manager 1430 can identify a first increasing mapping order of demodulation reference signals associated with the first type of SSB and a second decreasing mapping order of demodulation reference signals associated with the second type of SSB. In some examples, the type manager 1430 can identify a first decreasing mapping order of demodulation reference signals associated with the first type of SSB and a second increasing mapping order of demodulation reference signals associated with the second type of SSB. In some cases, the first mapping order and the second mapping order each comprise an order for mapping a sequence of symbols associated with a secondary synchronization signal onto one or more resource elements.

[0227] The raster indication transmitter 1425 can transmit, to one or more UEs, an indication of one of the first synchronization raster or the second synchronization raster for the UEs to use for receiving the one or more SSBs, where configuring the one or more resource elements is based on the indication.

[0228] The type indication transmitter 1435 can transmit, to one or more UEs, an indication of one of the first type of SSB or the second type of SSB that the UEs should monitor, where configuring the one or more resource elements is based on the indication. In some examples, the type indication transmitter 1435 can transmit a master information block including the indication.

[0229] Figure 15A diagram illustrating a system 1500 including a device 1505 that supports transmitting one or more SSBs via one or more RIS in accordance with aspects of the present disclosure is shown. The device 1505 can be an example of or include the components of device 1205, device 1305, or a base station 105 as described herein. The device 1505 can include components for bi-directional voice and data communications including components for transmitting and receiving communications, including a communications manager 1510, a network communications manager 1515, a transceiver 1520, an antenna 1525, memory 1530, a processor 1540, and an inter-station communications manager 1545. These components can be in electronic communication via one or more buses (e.g., bus 1550).

[0230] The communications manager 1510 can identify a first synchronization raster and a second synchronization raster for the base station to use for transmitting one or more SSBs, the second synchronization raster including a frequency location associated with a RIS, configure one or more resource elements for transmitting the one or more SSBs based on the first synchronization raster and the second synchronization raster, and transmit the one or more SSBs using the configured one or more REs. The communications manager 1510 can also identify a first type of SSB and a second type of SSB associated with a same synchronization raster and for transmission by the base station, where the second type of SSB is associated with a reconfigurable intelligent surface, configure one or more resource elements for transmitting one or more SSBs including one or more of the first type of SSB or the second type of SSB, and transmit the one or more SSBs using the configured one or more resource elements.

[0231] The network communications manager 1515 can manage communications with a core network (e.g., via one or more wired backhaul links). For example, the network communications manager 1515 can manage the transfer of data communications for client devices, such as one or more UEs 115.

[0232] The transceiver 1520 can communicate bi-directionally, via one or more antennas, wired, or wireless links as described above. For example, the transceiver 1520 can represent a wireless transceiver and can communicate bi-directionally with another wireless transceiver. The transceiver 1520 can also include a modem to modulate the packets and provide the modulated packets to the antennas for transmission, and to demodulate packets received from the antennas.

[0233] In some cases, the wireless device can include a single antenna 1525. However, in some cases the device can have more than one antenna 1525, which can be capable of concurrently transmitting or receiving multiple wireless transmissions.

[0234] Memory 1530 can include RAM, ROM, or a combination thereof. Memory 1530 can store computer-readable code 1535 including instructions that, when executed by a processor (e.g., processor 1540), cause the device to perform various functions described herein. In some cases, memory 1530 can include, inter alia, a BIOS that can control basic hardware or software operation such as the interaction with peripheral components or devices.

[0235] Processor 1540 can 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 1540 can be configured to operate a memory array using a memory controller. In some cases, a memory controller can be integrated into processor 1540. Processor 1540 can be configured to execute computer-readable instructions stored in a memory (e.g., memory 1530) to cause device 1505 to perform various functions (e.g., functions or tasks supporting communicating SSBs via RIS).

[0236] Inter-station communications manager 1545 can manage communications with other base station 105, and can include a controller or scheduler for controlling

[0237] Code 1535 can include instructions to implement aspects of the present disclosure, including instructions to support wireless communications. Code 1535 can be stored in a non-transitory computer-readable medium such as system memory or other type of memory. In some cases, code 1535 can not be directly executable by the processor 1540 but can cause a computer (e.g., when compiled and executed) to perform functions described herein.

[0238] Figure 16 A method 1600 to support communicating one or more SSBs via one or more RISs is shown and described in accordance with aspects of the present disclosure. Operations of method 1600 can be implemented by a UE 115 or its components as described herein. For example, the operations of method 1600 can be performed by a communications manager as described with reference to FIGs. 1 through 4. In some examples, a UE can execute a set of instructions to control its functional elements to perform the functions described below. Additionally or alternatively, the UE can perform aspects of the functions described below using special-purpose hardware. Figures 8 to 11 communications manager described with reference to FIGs. 1 through 4. In some examples, a UE can execute a set of instructions to control its functional elements to perform the functions described below. Additionally or alternatively, the UE can perform aspects of the functions described below using special-purpose hardware.

[0239] At 1605, the UE can identify a first synchronization raster and a second synchronization raster for the UE to use to receive one or more SSBs, the second synchronization raster including a frequency location associated with a RIS. The operations of 1605 can be performed according to the methods described herein. In some examples, aspects of the operations of 1605 can be performed by a synchronization raster manager as described with reference to Figures 8 to 11 FIG. 14.

[0240] At 1610, the UE can monitor one or more resource elements for the one or more SSBs based on one or more of the first synchronization raster or the second synchronization raster. The operations of 1610 can be performed according to the methods described herein. In some examples, aspects of the operations of 1610 can be performed by a resource monitor as described with reference to Figures 8 to 11 FIG. 14.

[0241] At 1615, the UE can receive at least one SSB based on monitoring the one or more resource elements. The operations of 1615 can be performed according to the methods described herein. In some examples, aspects of the operations of 1615 can be performed by a SSB receiver as described with reference to Figures 8 to 11 FIG. 14.

[0242] Figure 17 A method 1700 that supports transmitting one or more SSBs via one or more RISs is shown and described in accordance with aspects of the present disclosure. The operations of method 1700 can be implemented by a UE 115 or its components as described herein. For example, the operations of method 1700 can be performed by a communications manager as described with reference to Figures 8 to 11 FIG. 14. In some examples, a UE can execute a set of instructions to control its functional elements to perform the functions described below. Additionally or alternatively, the UE can perform aspects of the functions described below using special-purpose hardware.

[0243] At 1705, the UE can identify a first synchronization raster and a second synchronization raster for the UE to use to receive one or more SSBs, the second synchronization raster including a frequency location associated with a RIS. The operations of 1705 can be performed according to the methods described herein. In some examples, aspects of the operations of 1705 can be performed by a synchronization raster manager as described with reference to Figures 8 to 11 FIG. 14.

[0244] At 1710, the UE can scan one or more frequency locations in the first synchronization raster for the one or more SSBs. The operations of 1710 can be performed according to the methods described herein. In some examples, aspects of the operations of 1710 can be performed by a resource monitor as described with reference to Figures 8 to 11 FIG. 14.

[0245] At 1715, the UE can fail to detect the one or more SSBs at the one or more frequency locations in the first synchronization raster. The operations of 1715 can be performed according to the methods described herein. In some examples, aspects of the operations of 1715 can be performed by a resource monitor as described with reference to Figures 8 to 11 FIG. 16.

[0246] At 1720, the UE can scan one or more frequency locations in the second synchronization raster for the one or more SSBs. The operations of 1720 can be performed according to the methods described herein. In some examples, aspects of the operations of 1720 can be performed by a resource monitor as described with reference to Figures 8 to 11 FIG. 16.

[0247] At 1725, the UE can receive at least one SSB based on scanning the one or more frequency locations in the second synchronization raster. The operations of 1730 can be performed according to the methods described herein. In some examples, aspects of the operations of 1730 can be performed by a SSB receiver as described with reference to Figures 8 to 11 FIG. 16.

[0248] Figure 18 A method 1800 that supports transmitting one or more SSBs via one or more RISs in accordance with aspects of the present disclosure is shown. The operations of method 1800 can be implemented by a UE 115 or its components as described herein. For example, the operations of method 1800 can be performed by a communications manager as described with reference to Figures 8 to 11 FIG. 19. In some examples, a UE can execute a set of instructions to control its functional elements to perform the functions described below. Additionally or alternatively, the UE can perform aspects of the functions described below using special-purpose hardware.

[0249] At 1805, the UE can identify a first type of SSB and a second type of SSB associated with a same synchronization raster and for reception by the UE, where the second type of SSB is associated with a RIS. The operations of 1805 can be performed according to the methods described herein. In some examples, aspects of the operations of 1805 can be performed by a type manager as described with reference to Figures 8 to 11 FIG. 19.

[0250] At 1810, the UE can monitor one or more resource elements for one or more SSBs including one or more of the first type of SSB or the second type of SSB. The operations of 1810 can be performed according to the methods described herein. In some examples, aspects of the operations of 1810 can be performed by a resource monitor as described with reference to Figures 8 to 11 FIG. 19.

[0251] At 1815, the UE can receive at least one SSB of the first type or the second type based on monitoring the one or more REs. The operations of 1815 can be performed according to the methods described herein. In some examples, aspects of the operations of 1815 can be performed by a SSB receiver as described with reference to Figure 19 FIG. 16 according to the methods described herein.

[0252] Figures 8 to 11 A method 1900 that supports transmitting one or more SSBs via one or more RISs in accordance with aspects of the present disclosure is shown and described. Operations of method 1900 can be implemented by a UE 115 or its components as described herein. For example, operations of method 1900 can be performed by a communication manager as described with reference to Figures 8 to 11 FIG. 16 according to the methods described herein. In some examples, a UE can execute a set of instructions to control its functional elements to perform the functions described below. Additionally or alternatively, the UE can perform aspects of the functions described below using special-purpose hardware.

[0253] At 1905, the UE can identify a first type of SSB and a second type of SSB associated with a same synchronization raster and for reception by the UE, where the second type of SSB is associated with a RIS. The operations of 1905 can be performed according to the methods described herein. In some examples, aspects of the operations of 1905 can be performed by a type manager as described with reference to Figures 8 to 11 FIG. 16 according to the methods described herein.

[0254] At 1910, the UE can scan a first frequency location in the synchronization raster for the first type of SSB. The operations of 1910 can be performed according to the methods described herein. In some examples, aspects of the operations of 1910 can be performed by a resource monitor as described with reference to Figures 8 to 11 FIG. 16 according to the methods described herein.

[0255] At 1915, the UE can fail to detect the first type of SSB at the first frequency location. The operations of 1915 can be performed according to the methods described herein. In some examples, aspects of the operations of 1915 can be performed by a resource monitor as described with reference to Figures 8 to 11 FIG. 16 according to the methods described herein.

[0256] At 1920, the UE can scan the first frequency location in the synchronization raster for the second type of SSB. The operations of 1920 can be performed according to the methods described herein. In some examples, aspects of the operations of 1920 can be performed by a resource monitor as described with reference to Figures 8 to 11 FIG. 16 according to the methods described herein.

[0257] At 1925, the UE can receive at least one SSB of the first type or the second type based on scanning a first frequency location in the synchronization raster for the second type of SSB. The operations of 1930 can be performed according to the methods described herein. In some examples, aspects of the operations of 1930 can be performed by a SSB receiver as described with reference to Figure 20 The SSB receiver described can receive the SSBs.

[0258] Figures 12 to 15 A flow diagram illustrating a method 2000 that supports transmitting one or more SSBs via one or more RIS in accordance with aspects of the present disclosure is shown. The operations of method 2000 can be implemented by a base station 105 or its components as described herein. For example, the operations of method 2000 can be performed by a communications manager as described with reference to Figures 12 to 15 In some examples, a base station can execute a set of instructions to control its functional elements to perform the functions described below. Additionally or alternatively, the base station can perform aspects of the functions described below using special-purpose hardware.

[0259] At 2005, the base station can identify a first synchronization raster and a second synchronization raster for the base station to use to transmit one or more SSBs, the second synchronization raster including a frequency location associated with a RIS. The operations of 2005 can be performed according to the methods described herein. In some examples, aspects of the operations of 2005 can be performed by a synchronization raster manager as described with reference to Figures 12 to 15

[0260] At 2010, the base station can configure one or more resource elements to transmit the one or more SSBs based on the first synchronization raster and the second synchronization raster. The operations of 2010 can be performed according to the methods described herein. In some examples, aspects of the operations of 2010 can be performed by a resource component as described with reference to Figures 12 to 15

[0261] At 2015, the base station can transmit the one or more SSBs using the configured one or more REs. The operations of 2015 can be performed according to the methods described herein. In some examples, aspects of the operations of 2015 can be performed by a SSB transmitter as described with reference to Figure 21

[0262] Figures 12 to 15 A flow diagram illustrating a method 2100 that supports transmitting one or more SSBs via one or more RIS in accordance with aspects of the present disclosure is shown. The operations of method 2100 can be implemented by a base station 105 or its components as described herein. For example, the operations of method 2100 can be performed by a communications manager as described with reference to Figures 12 to 15 ​​​The described communication manager performs. In some examples, the base station can execute a set of instructions to control its functional elements to perform the functions described below. Additionally or alternatively, the base station can perform aspects of the functions described below using special-purpose hardware.

[0263] At 2105, the base station can identify a first type of SSB and a second type of SSB associated with a same synchronization raster and for transmission by the base station, where the second type of SSB is associated with a reconfigurable intelligent surface. The operations of 2105 can be performed according to the methods described herein. In some examples, aspects of the operations of 2105 can be performed by a type manager as described with reference to Figures 12 to 15 FIG. 19.

[0264] At 2110, the base station can configure one or more resource elements to transmit one or more SSBs including one or more of the first type of SSB or the second type of SSB. The operations of 2110 can be performed according to the methods described herein. In some examples, aspects of the operations of 2110 can be performed by a resource component as described with reference to Figures 12 to 15 FIG. 19.

[0265] At 2115, the base station can transmit the one or more SSBs using the configured one or more resource elements. The operations of 2115 can be performed according to the methods described herein. In some examples, aspects of the operations of 2115 can be performed by a SSB transmitter as described with reference to ​ FIG. 19.

[0266] implementations, and that the operations and steps can be rearranged or otherwise modified and that other implementations are possible. Further, aspects from two or more of the methods can be combined.

[0267] Although aspects of an LTE, LTE-A, LTE-A Pro, or NR system can be described for purposes of example, and LTE, LTE-A, LTE-A Pro, or NR terminology can be used in much of the description, aspects of the described techniques can be applied to

[0268] Information and signals described herein can be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that can be referenced throughout the description can be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

[0269] The various illustrative blocks and components described in connection with the disclosure herein can be implemented or performed with a general-purpose processor, a DSP, an ASIC, a CPU, a 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. The general-purpose processor can be a microprocessor, but in the alternative, the processor can be any processor, controller, microcontroller, or state machine. The processor can also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration).

[0270] The functions described herein can be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions can be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope of the disclosure and appended claims. For example, due to the nature of software, functions described herein can be implemented using software executed by a processor, hardware, firmware, hardwiring, or combinations of any of these. Features implementing functions can also be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations.

[0271] Computer-readable media includes both non-transitory computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A non-transitory storage medium can be any available medium that can be accessed by a general purpose or special purpose computer. By way of example, and not limitation, non-transitory computer-readable media can include RAM, ROM, electrically erasable programmable ROM (EEPROM), flash memory, compact disk (CD) ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that can be used to carry or store desired program code means in the form of instructions or data structures and that can be accessed by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor. Also, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of computer-readable medium. Disk and disc, as used herein, include CD, laser disc, optical disc, digital versatile disc (DVD), floppy disk and Blu-ray disc where 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.

[0272] As used herein, including in the claims “or” as used in a list of items (for example, a list of items prefaced by a phrase such as “at least one of’ or “one or more of’) indicates an inclusive list such that, for example, a list of at least one of A, B, or C means A or B or C or AB or AC or BC or ABC (i.e., A and B and C). Also, as used herein, the phrase “based on” shall not be construed as a reference to a closed set of conditions. For example, an example step that is described as “based on condition A” can be based on both a condition A and a condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase “based on” shall be construed in the same manner as the phrase “based at least in part on.”

[0273] In the drawings, like reference numerals refer to items of like functionality. In addition, the particular features, structures, or characteristics can be shown in various drawings with an adjunct letter following the reference numeral and a dashed line to indicate like reference numerals for like features among different drawings. The description can apply to any one of the like features, regardless of the adjunct letter or other subsequent reference numerals, where only the first reference numeral is used in the specification.

[0274] The description set forth herein with respect to the appended drawings describes example configurations and is not intended to represent the only examples or the only structures in which the claims can be practiced. The term "example" is used only to provide an example, illustration, or description, and not to imply superiority or inferiority of other examples. The detailed description includes specific details to provide a thorough understanding of the described techniques. However, techniques can be practiced without these specific details. In some instances, well-known structures and devices are shown in block diagram form to avoid obscuring the concepts of the described examples.

[0275] The description herein is presented to enable any person skilled in the art to make or use the disclosure. Various modifications to the disclosure will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other variations without departing from the scope of the disclosure. Thus, the disclosure is not to be limited to the examples and designs described herein but is to be accorded the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for wireless communication at a user equipment (UE), comprising: identifying a first synchronization raster and a second synchronization raster for use by the UE to receive one or more synchronization signal blocks, the second synchronization raster comprising frequency locations associated with a reconfigurable smart surface; receiving an indication from a network entity that the second synchronization grid is associated with the reconfigurable smart surface, wherein the UE uses one or both of the first synchronization grid or the second synchronization grid based at least in part on receiving the indication that the second synchronization grid is associated with the reconfigurable smart surface and whether the UE is able to interact with the reconfigurable smart surface; monitoring one or more resource elements for the one or more synchronization signal blocks based at least in part on one or more of the first synchronization raster or the second synchronization raster; as well as At least one synchronization signal block is received based at least in part on monitoring the one or more resource elements.

2. The method of claim 1 , wherein monitoring the one or more resource elements comprises: scanning one or more frequency locations in the first synchronization grid to find the one or more synchronization signal blocks; a failure to detect the one or more synchronization signal blocks at the one or more frequency locations in the first synchronization raster; as well as One or more frequency positions in the second synchronization raster are scanned for the one or more synchronization signal blocks, wherein receiving the at least one synchronization signal block is based at least in part on scanning the one or more frequency positions in the second synchronization raster.

3. The method of claim 1 , wherein monitoring the one or more resource elements comprises: One or more frequency positions in the first synchronization raster are scanned for the one or more synchronization signal blocks, wherein receiving the at least one synchronization signal block is based at least in part on scanning the one or more frequency positions in the first synchronization raster.

4. The method of claim 3, further comprising: Scanning one or more frequency locations in the second synchronization raster is refrained based at least in part on receiving the at least one synchronization signal block at the one or more frequency locations in the first synchronization raster.

5. The method of claim 1, further comprising: A priority associated with the first synchronization raster is determined to be different than a priority associated with the second synchronization raster, wherein monitoring the one or more resource elements is based at least in part on the determination.

6. The method of claim 5, wherein determining that the priority associated with the first synchronization grid is different from the priority associated with the second synchronization grid comprises: A priority associated with the first synchronization grid is determined to be higher than a priority associated with the second synchronization grid.

7. The method of claim 5, wherein determining that the priority associated with the first synchronization grid is different from the priority associated with the second synchronization grid comprises: The priority associated with the first synchronization grid is determined to be lower than the priority associated with the second synchronization grid.

8. The method of claim 1, further comprising: An indication is received from the network entity of one of the first synchronization raster or the second synchronization raster that the UE is to use to receive the one or more synchronization signal blocks, wherein monitoring the one or more resource elements is based at least in part on receiving the indication.

9. The method of claim 1 , wherein identifying the first synchronization grid and the second synchronization grid comprises: A first set of frequency positions in the first synchronization raster and a second set of frequency positions in the second synchronization raster are identified, the second set of frequency positions in the second synchronization raster not overlapping with the first set of frequency positions in the first synchronization raster.

10. An apparatus for wireless communication at a user equipment (UE), comprising: processor, a memory coupled to the processor; as well as Instructions stored in the memory and executable by the processor to cause the apparatus to: identifying a first synchronization raster and a second synchronization raster for use by the UE to receive one or more synchronization signal blocks, the second synchronization raster comprising frequency locations associated with a reconfigurable smart surface; receiving an indication from a network entity that the second synchronization grid is associated with the reconfigurable smart surface, wherein the UE uses one or both of the first synchronization grid or the second synchronization grid based at least in part on receiving the indication that the second synchronization grid is associated with the reconfigurable smart surface and whether the UE is able to interact with the reconfigurable smart surface; monitoring one or more resource elements for the one or more synchronization signal blocks based at least in part on one or more of the first synchronization raster or the second synchronization raster; as well as At least one synchronization signal block is received based at least in part on monitoring the one or more resource elements.

11. The apparatus of claim 10, wherein the instructions for monitoring the one or more resource elements are executable by the processor to cause the apparatus to: scanning one or more frequency locations in the first synchronization grid to find the one or more synchronization signal blocks; failing to detect the one or more synchronization signal blocks at the one or more frequency locations in the first synchronization raster; and One or more frequency positions in the second synchronization raster are scanned for the one or more synchronization signal blocks, wherein receiving the at least one synchronization signal block is based at least in part on scanning the one or more frequency positions in the second synchronization raster.

12. The apparatus of claim 10, wherein the instructions for monitoring the one or more resource elements are executable by the processor to cause the apparatus to: One or more frequency positions in the first synchronization raster are scanned for the one or more synchronization signal blocks, wherein receiving the at least one synchronization signal block is based at least in part on scanning the one or more frequency positions in the first synchronization raster.

13. The apparatus of claim 12, wherein the instructions are further executable by the processor to cause the apparatus to: Scanning one or more frequency locations in the second synchronization raster is refrained based at least in part on receiving the at least one synchronization signal block at the one or more frequency locations in the first synchronization raster.

14. The apparatus of claim 10, wherein the instructions are further executable by the processor to cause the apparatus to: A priority associated with the first synchronization raster is determined to be different than a priority associated with the second synchronization raster, wherein monitoring the one or more resource elements is based at least in part on the determination.

15. The apparatus of claim 14, wherein the instructions for determining that the priority associated with the first synchronization grid is different from the priority associated with the second synchronization grid are executable by the processor to cause the apparatus to: A priority associated with the first synchronization grid is determined to be higher than a priority associated with the second synchronization grid.

16. The apparatus of claim 14, wherein the instructions for determining that the priority associated with the first synchronization grid is different from the priority associated with the second synchronization grid are executable by the processor to cause the apparatus to: The priority associated with the first synchronization grid is determined to be lower than the priority associated with the second synchronization grid.

17. The apparatus of claim 10, wherein the instructions are further executable by the processor to cause the apparatus to: An indication is received from the network entity of one of the first synchronization raster or the second synchronization raster that the UE is to use to receive the one or more synchronization signal blocks, wherein monitoring the one or more resource elements is based at least in part on receiving the indication.

18. The apparatus of claim 10, wherein the instructions for identifying the first synchronization grid and the second synchronization grid are executable by the processor to cause the apparatus to: A first set of frequency locations in the first synchronization raster and a second set of frequency locations in the second synchronization raster are identified, the second set of frequency locations in the second synchronization raster not overlapping with the first set of frequency locations in the first synchronization raster.

19. An apparatus for wireless communication at a user equipment (UE), comprising: means for identifying a first synchronization raster and a second synchronization raster for use by the UE in receiving one or more synchronization signal blocks, the second synchronization raster comprising frequency locations associated with a reconfigurable smart surface; means for receiving an indication from a network entity that the second synchronization grid is associated with the reconfigurable smart surface, wherein the UE utilizes one or both of the first synchronization grid or the second synchronization grid based at least in part on receiving the indication that the second synchronization grid is associated with the reconfigurable smart surface and whether the UE is able to interact with the reconfigurable smart surface; means for monitoring one or more resource elements for the one or more synchronization signal blocks based at least in part on one or more of the first synchronization raster or the second synchronization raster; as well as Means for receiving at least one synchronization signal block based at least in part on monitoring the one or more resource elements.

20. The apparatus of claim 19, wherein the means for monitoring the one or more resource elements comprises: means for scanning one or more frequency locations in said first synchronization raster for said one or more synchronization signal blocks; means for failing to detect the one or more synchronization signal blocks at the one or more frequency locations in the first synchronization raster; as well as Means for scanning one or more frequency positions in the second synchronization grid for the one or more synchronization signal blocks, wherein receiving the at least one synchronization signal block is based at least in part on scanning the one or more frequency positions in the second synchronization grid.

21. The apparatus of claim 19, wherein the means for monitoring the one or more resource elements comprises: Means for scanning one or more frequency positions in the first synchronization grid for the one or more synchronization signal blocks, wherein receiving the at least one synchronization signal block is based at least in part on scanning the one or more frequency positions in the first synchronization grid.

22. The apparatus of claim 19, further comprising: Means for determining that a priority associated with the first synchronization raster is different than a priority associated with the second synchronization raster, wherein monitoring the one or more resource elements is based at least in part on the determination.

23. The apparatus of claim 19, further comprising: Means for receiving an indication from the network entity of one of the first synchronization raster or the second synchronization raster that the UE is to use to receive the one or more synchronization signal blocks, wherein monitoring the one or more resource elements is based at least in part on receiving the indication.

24. A non-transitory computer-readable medium storing code for wireless communication at a user equipment (UE), the code comprising instructions executable by a processor to: identifying a first synchronization raster and a second synchronization raster for use by the UE to receive one or more synchronization signal blocks, the second synchronization raster comprising frequency locations associated with a reconfigurable smart surface; receiving an indication from a network entity that the second synchronization grid is associated with the reconfigurable smart surface, wherein the UE uses one or both of the first synchronization grid or the second synchronization grid based at least in part on receiving the indication that the second synchronization grid is associated with the reconfigurable smart surface and whether the UE is able to interact with the reconfigurable smart surface; monitoring one or more resource elements for the one or more synchronization signal blocks based at least in part on one or more of the first synchronization raster or the second synchronization raster; as well as At least one synchronization signal block is received based at least in part on monitoring the one or more resource elements.

25. The non-transitory computer-readable medium of claim 24, wherein the instructions for monitoring the one or more resource elements are executable to: scanning one or more frequency locations in the first synchronization grid to find the one or more synchronization signal blocks; failing to detect the one or more synchronization signal blocks at the one or more frequency locations in the first synchronization raster; and One or more frequency positions in the second synchronization raster are scanned for the one or more synchronization signal blocks, wherein receiving the at least one synchronization signal block is based at least in part on scanning the one or more frequency positions in the second synchronization raster.

26. The non-transitory computer-readable medium of claim 24, wherein the instructions for monitoring the one or more resource elements are executable to: One or more frequency positions in the first synchronization raster are scanned for the one or more synchronization signal blocks, wherein receiving the at least one synchronization signal block is based at least in part on scanning the one or more frequency positions in the first synchronization raster.

27. The non-transitory computer readable medium of claim 24, wherein the instructions are further executable to: A priority associated with the first synchronization raster is determined to be different than a priority associated with the second synchronization raster, wherein monitoring the one or more resource elements is based at least in part on the determination.

28. The non-transitory computer readable medium of claim 24, wherein the instructions are further executable to: An indication is received from the network entity of one of the first synchronization raster or the second synchronization raster that the UE is to use to receive the one or more synchronization signal blocks, wherein monitoring the one or more resource elements is based at least in part on receiving the indication.

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