High path loss mode support

Abstract

Methods, systems, and devices for wireless communications are described. A wireless device (e.g., user equipment and / or a base station) (405) may operate in a first mode on a radio frequency spectrum band in a wireless network (415). The wireless device (405) may receive a signal (420) indicating that a value of the radio frequency spectrum band has satisfied a threshold. The wireless device may switch from the first mode to a second mode for wireless communications in the wireless network (425) based at least in part on the signal indicating that the value has satisfied the threshold, wherein a first length of a first synchronization signal block associated with the first mode is shorter than a second length of a second synchronization signal block associated with the second mode.

Description

[0001] Cross-references

[0002] This patent application claims priority to U.S. patent application No. 16 / 807,008, entitled “SUPPORT OF HIGHPATHLOSS MODE,” filed by LI et al. on March 2, 2020, and U.S. provisional patent application No. 62 / 814,564, entitled “SUPPORT OF HIGH PATHLOSS MODE,” filed by LI et al. on March 6, 2019, each of which is assigned to the assignee of this application.

[0003] introduction

[0004] The following relates to wireless communications, and more particularly to managing link budget in a path loss environment.

[0005] Wireless communication systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, etc. These systems may be able to support communication with multiple users by sharing available system resources (e.g., time, frequency, and power). Examples of such multiple access systems include fourth generation (4G) systems (such as long term evolution (LTE) systems, advanced LTE (LTE-A) systems, or LTE-A Pro systems), and fifth generation (5G) systems, which may be referred to as new radio (NR) systems. These systems may employ various 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).

[0006] A wireless multiple access communication system may include several base stations or network access nodes, each of which supports communication of multiple communication devices at the same time, which may be further referred to as user equipment (UE). Communication between a base station and a UE may occur on a wireless channel (e.g., a radio frequency spectrum band) between a transmitting device and a receiving device. Due to various conditions, the channel (or path) between each communication device may experience interference, blocking, etc., so that wireless communication may fail. For example, some technologies may adjust various parameters for performing wireless communication on a channel (or path) to adapt to channel conditions. However, such technologies are only applicable when the path loss (e.g., interference, blocking, etc.) between each communication device is within a given range. However, some deployment scenarios may experience excessive path loss, for example, such as in a millimeter wave (mmW) network, where the path loss exceeds the ability of some technologies to accommodate large changes in path loss. For example, when the path loss value / transmission power level between each communication device meets or otherwise exceeds a threshold, some technologies may not support wireless communication. In these instances, the wireless network may not be able to support wireless communication.

[0007] Overview

[0008] A method of wireless communication at a wireless device is described. The method may include: operating in a first mode on a radio frequency spectrum band in a wireless network; receiving a signal indicating that a value of the radio frequency spectrum band has satisfied a threshold; and switching from the first mode to a second mode for wireless communication in the wireless network based on the signal indicating that the value has satisfied the threshold, wherein a first length of a first synchronization signal block associated with the first mode is shorter than a second length of a second synchronization signal block associated with the second mode.

[0009] An apparatus for wireless communication at a wireless device is described. The apparatus may include a processor and a memory coupled to the processor, the processor and the memory being configured to: operate in a first mode on a radio frequency spectrum band in a wireless network; receive a signal indicating that a value of the radio frequency spectrum band has satisfied a threshold; and switch from the first mode to a second mode for wireless communication in the wireless network based on the signal indicating that the value has satisfied the threshold, wherein a first length of a first synchronization signal block associated with the first mode is shorter than a second length of a second synchronization signal block associated with the second mode.

[0010] Another apparatus for wireless communication at a wireless device is described. The apparatus may include means for: operating in a first mode on a radio frequency spectrum band in a wireless network; receiving a signal indicating that a value of the radio frequency spectrum band has satisfied a threshold; and switching from the first mode to a second mode for wireless communication in the wireless network based on the signal indicating that the value has satisfied the threshold, wherein a first length of a first synchronization signal block associated with the first mode is shorter than a second length of a second synchronization signal block associated with the second mode.

[0011] A non-transitory computer-readable medium storing code for wireless communication at a wireless device is described. The code may include instructions executable by a processor for the following operations: operating in a first mode on a radio frequency spectrum band in a wireless network; receiving a signal indicating that a value of the radio frequency spectrum band has satisfied a threshold; and switching from the first mode to a second mode for wireless communication in the wireless network based on the signal indicating that the value has satisfied the threshold, wherein a first length of a first synchronization signal block associated with the first mode is shorter than a second length of a second synchronization signal block associated with the second mode.

[0012] In some examples of the methods, apparatus (equipment), and non-transitory computer-readable media described herein, the wireless network includes an integrated access and backhaul (IAB) network.

[0013] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may further include operations, features, means, or instructions for performing wireless backhaul communications with a second wireless device of the IAB network according to the second mode.

[0014] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may further include operations, features, means, or instructions for performing wireless backhaul communications with a third wireless device of the IAB network according to the first mode or the second mode.

[0015] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the value comprises a path loss value and the threshold comprises a threshold path loss value.

[0016] Some examples of the methods, apparatus (equipment) and non-transitory computer-readable media described herein may further include operations, features, apparatus or instructions for determining that the signal is received at a received power level below a threshold level, wherein the signal is received at a received power level below the threshold level indicating that the path loss value has exceeded a threshold path loss value.

[0017] Some examples of methods, apparatus (equipment), and non-transitory computer-readable media described herein may further include operations, features, means, or instructions for transmitting an indication to one or more other wireless devices that the wireless device may have switched to the second mode.

[0018] Some examples of methods, apparatuses, and non-transitory computer-readable media described herein may further include operations, features, means, or instructions for decoding the signal to determine that the value may have exceeded the threshold.

[0019] In some examples of the methods, apparatus (equipment), and non-transitory computer-readable media described herein, the signal includes at least one of an in-band signal, an out-of-band signal, a broadcast signal, a unicast signal, or a combination thereof.

[0020] In some examples of the methods, apparatus (equipment), and non-transitory computer-readable media described herein, a first length of a first reference signal associated with the first pattern may be shorter than a second length of a second reference signal associated with the second pattern.

[0021] In some examples of the methods, apparatus (equipment), and non-transitory computer-readable media described herein, a first modulation and coding scheme (MCS) associated with the first mode may be higher than a second MCS associated with the second mode.

[0022] In some examples of the methods, apparatus (equipment), and non-transitory computer-readable media described herein, a first bandwidth associated with the first mode may be wider than a second bandwidth associated with the second mode.

[0023] In some examples of the methods, apparatus (equipment), and non-transitory computer-readable media described herein, a first beamwidth associated with the first mode may be narrower than a second beamwidth associated with the second mode.

[0024] In some examples of the methods, apparatus (equipment), and non-transitory computer-readable media described herein, the radio frequency spectrum band is an unlicensed radio frequency spectrum band.

[0025] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the wireless network is a millimeter wave wireless network. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1

[0013] An example of a system for wireless communications supporting use of a high path loss mode in accordance with one or more aspects of the present disclosure is illustrated.

[0028] Figure 2An example of a wireless communication system supporting use of a high path loss mode in accordance with one or more aspects of the present disclosure is illustrated.

[0029] Figure 3 An example of a wireless communication system supporting use of a high path loss mode in accordance with one or more aspects of the present disclosure is illustrated.

[0030] Figure 4 An example of a process that supports the use of a high path loss mode in accordance with one or more aspects of the present disclosure is illustrated.

[0031] Figure 5 and 6 A block diagram of a device supporting use of a high path loss mode in accordance with one or more aspects of the present disclosure is shown.

[0032] Figure 7 A block diagram of a communications manager supporting use of a high path loss mode in accordance with one or more aspects of the present disclosure is shown.

[0033] Figure 8 A diagram of a system including a UE supporting use of a high path loss mode is shown in accordance with one or more aspects of the present disclosure.

[0034] Fig. 9 A diagram of a system including a base station supporting use of a high path loss mode is shown in accordance with one or more aspects of the present disclosure.

[0035] Figures 10 to 12 A flow chart illustrating a method of supporting use of a high path loss mode in accordance with one or more aspects of the present disclosure is shown.

[0036] Detailed Description

[0037] Wireless communication systems may operate in the mmW frequency range (e.g., 28 GHz, 40 GHz, 60 GHz, etc.). Wireless communication at these frequencies may be associated with increased signal attenuation (e.g., path loss), which may be affected by various factors, such as temperature, air pressure, diffraction, obstruction, etc. As a result, signal processing techniques (such as beamforming) may be used to coherently combine energy and overcome path losses at these frequencies. Due to the increased amount of path loss in mmW communication systems, transmissions from base stations and / or UEs may be beamformed. In addition, a receiving device may use beamforming techniques to configure antenna(s) and / or antenna array(s) so that transmissions are received in a directional manner.

[0038] In addition, wireless communications may have different reliability requirements to ensure that information is communicated between wireless devices (e.g., UE(s) and / or base station(s). To ensure that wireless communications meet reliability requirements, some techniques may provide a mechanism to respond to limited changes in path loss values. For example, these techniques may be configured to accommodate relatively small changes in path loss, but may fail when the path loss / transmission power level between the communication devices meets or otherwise exceeds a threshold. This may interfere with, and sometimes prevent, wireless communications on the RF spectrum band.

[0039] Accordingly, various aspects of the described technology provide various mechanisms for maintaining link budgets in challenging path loss environments. Broadly, the described technology enables a wireless device communicating in a wireless network to utilize a high path loss / transmission power level mode when a path loss / transmission power level value meets (or exceeds) a threshold. For example, one or more wireless devices (e.g., base stations and / or UEs) may perform wireless communications on a radio frequency spectrum band in a wireless network. In some aspects, this may include the wireless device(s) operating in a first mode (e.g., a low path loss mode, a normal transmission power level mode, or a normal mode) in a wireless network. The wireless device(s) may receive a signal indicating that the value has met (or exceeded) a threshold. As an example, the wireless device(s) may monitor a channel (e.g., monitor a signal being communicated on the channel) and determine that the path loss value / transmission power level has met (or exceeded) a threshold. In another example, the wireless device(s) may receive a signal indicating that the value has met (or exceeded) a threshold from another wireless device. Accordingly, the wireless device(s) may switch from a first mode (e.g., a low path loss / transmission power level mode) to a second mode (e.g., a high path loss / low transmission power level mode) to continue to perform wireless communications on the wireless network. Broadly, the second mode (e.g., a high path loss mode) may include one or more parameters for supporting continued wireless communications in a high path loss environment. Examples of parameters that may be adjusted may include, but are not limited to, a longer length of a synchronization signal block (SSB) in a high path loss mode, a longer length of a reference signal in a high path loss mode, a lower MCS in a high path loss mode, and the like. Accordingly, the wireless device may continue to perform wireless communications in a wireless network in a high path loss environment according to the second mode (e.g., a high path loss / low transmission power level mode).

[0040] Aspects of the disclosure are initially described in the context of wireless communication systems. Aspects of the disclosure are further illustrated and described by and with reference to apparatus diagrams, system diagrams, and flow diagrams related to support of high path loss modes.

[0041] Figure 1An example of a wireless communication system 100 that supports the use of a high path loss mode in accordance with one or more aspects of the present disclosure is illustrated. The wireless communication system 100 includes a base station 105, a UE 115, and a core network 130. In some examples, the wireless communication system 100 may be an LTE network, an LTE-A network, an LTE-A Pro network, or an NR network. In some cases, the wireless communication system 100 may support enhanced broadband communications, ultra-reliable (e.g., mission-critical) communications, low latency communications, or communications with low-cost and low-complexity devices.

[0042] The base station 105 may communicate wirelessly with the UE 115 via one or more base station antennas. The base station 105 described herein may include or may be referred to by those skilled in the art as a base transceiver station, a radio base station, an access point, a radio transceiver, a Node B, an evolved Node B (eNB), a next generation Node B, or a Gigabit Node B (any of which may be referred to as a gNB), a Home Node B, a Home Evolved Node B, or some other suitable terminology. The wireless communication system 100 may include different types of base stations 105 (e.g., macro base stations or small cell base stations). The UE 115 described herein may be able to communicate with various types of base stations 105 and network equipment (including macro eNBs, small cell eNBs, gNBs, relay base stations, etc.).

[0043] Each base station 105 may be associated with a particular geographic coverage area 110 in which it supports communications with various UEs 115. Each base station 105 may provide communications coverage for the respective geographic coverage area 110 via a communications link 125, and the communications link 125 between the base station 105 and the UE 115 may utilize one or more carriers. The communications link 125 shown in the wireless communication system 100 may include an uplink transmission from the UE 115 to the base station 105, or a downlink transmission from the base station 105 to the UE 115. Downlink transmissions may also be referred to as forward link transmissions, and uplink transmissions may also be referred to as reverse link transmissions.

[0044] The geographic coverage area 110 of the base station 105 may be divided into sectors that constitute a portion of the geographic coverage area 110, and each sector may be associated with a cellular cell. For example, each base station 105 may provide communication coverage for a macrocellular cell, a small cellular cell, a hotspot, or other types of cellular cells, or various combinations thereof. In some examples, the base station 105 may be mobile and therefore provide communication coverage for a mobile geographic coverage area 110. In some examples, different geographic coverage areas 110 associated with different technologies may overlap, and the overlapping geographic coverage areas 110 associated with different technologies may be supported by the same base station 105 or different base stations 105. The wireless communication system 100 may include, for example, a heterogeneous LTE / LTE-A / LTE-A Pro or NR network, in which different types of base stations 105 provide coverage for various geographic coverage areas 110.

[0045] The term "cell" refers to a logical communication entity for communicating with base station 105 (e.g., on a carrier), and may be associated with an identifier to distinguish adjacent cells operating via the same or different carriers (e.g., physical cell identifier (PCID), virtual cell identifier (VCID)). In some examples, a carrier may support multiple cells, and different cells may be configured according to different protocol types that may provide access to different types of devices (e.g., machine type communication (MTC), narrowband Internet of Things (NB-IoT), enhanced mobile broadband (eMBB), or others). In some cases, the term "cell" may refer to a portion of a geographic coverage area 110 (e.g., a sector) on which the logical entity operates.

[0046] Each UE 115 can be dispersed throughout the wireless communication system 100, and each UE 115 can be stationary or mobile. UE 115 can also be referred to as a mobile device, a wireless device, a remote device, a handheld device, or a subscriber device, or some other suitable term, wherein "device" can also be referred to as a unit, a station, a terminal, or a client. UE 115 can also be a personal electronic device, such as a cellular phone, a personal digital assistant (PDA), a tablet computer, a laptop computer, or a personal computer. In some examples, UE 115 can also refer to a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or an MTC device, etc., which can be implemented in various items (such as electrical appliances, vehicles, meters, etc.).

[0047] Some UEs 115, such as MTC or IoT devices, may be low-cost or low-complexity devices and may provide automated communication between machines (e.g., via machine-to-machine (M2M) communication). M2M communication or MTC may refer to data communication technology that allows devices to communicate with each other or with a base station 105 without human intervention. In some examples, M2M communication or MTC may include communications from devices that integrate sensors or meters to measure or capture information and relay the information to a central server or application, which may utilize the information or present the information to a person interacting with the program or application. Some UEs 115 may be designed to collect information or implement automated behavior of machines. Examples of applications for MTC devices include: smart metering, inventory monitoring, water level monitoring, equipment monitoring, health care monitoring, field survival monitoring, weather and geographic event monitoring, queue management and tracking, remote security sensing, physical access control, and transaction-based commercial charging.

[0048] Some UEs 115 may be configured to employ a reduced power consumption mode of operation, such as half-duplex communication (e.g., a mode that supports unidirectional communication via transmission or reception but not simultaneous transmission and reception). In some examples, half-duplex communication may be performed with a reduced peak rate. Other power saving techniques for UE 115 include entering a power saving "deep sleep" mode when not engaged in active communications, or operating over a limited bandwidth (e.g., in accordance with narrowband communications). In some cases, UE 115 may be designed to support critical functions (e.g., mission critical functions), and the wireless communication system 100 may be configured to provide ultra-reliable communications for these functions.

[0049] In some cases, UE 115 may also be able to communicate directly with other UE 115 (e.g., using a peer-to-peer (P2P) or device-to-device (D2D) protocol). One or more UEs in a group of UEs 115 utilizing D2D communication may be within the geographic coverage area 110 of the base station 105. Other UEs 115 in this group may be outside the geographic coverage area 110 of the base station 105, or may not be able to receive transmissions from the base station 105 for other reasons. In some cases, each group of UEs 115 communicating via D2D communication may utilize a one-to-many (1:M) system, in which each UE 115 transmits to each other UE 115 in the group. In some cases, the base station 105 facilitates the scheduling of resources for D2D communication. In other cases, D2D communication is performed between UEs 115 without involving the base station 105.

[0050] The base stations 105 may communicate with the core network 130 and with each other. For example, the base stations 105 may interface with the core network 130 via a backhaul link 132 (e.g., via S1, N2, N3, or other interfaces). The base stations 105 may communicate with each other directly (e.g., directly between the base stations 105) or indirectly (e.g., via the core network 130) on a backhaul link 134 (e.g., via X2, Xn, or other interfaces).

[0051] The core network 130 may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. The core network 130 may be an evolved packet core (EPC), which may include at least one mobility management entity (MME), at least one serving gateway (S-GW), and at least one packet data network (PDN) gateway (P-GW). The MME may manage non-access layer (e.g., control plane) functions such as mobility, authentication, and bearer management of UEs 115 served by base stations 105 associated with the EPC. User IP packets may be delivered through the S-GW, which itself may be connected to the P-GW. The P-GW may provide IP address allocation and other functions. The P-GW may be connected to network operator IP services. Operator IP services may include access to the Internet, an intranet, an IP multimedia subsystem (IMS), or packet switched (PS) streaming services.

[0052] At least some network devices (such as base stations 105) may include subcomponents, such as access network entities, which may be examples of access node controllers (ANCs). Each access network entity may communicate with each UE 115 through a number of other access network transport entities, which may be referred to as radio heads, smart radio heads, or transmission / reception points (TRPs). In some configurations, the various functions of each access network entity or base station 105 may be distributed across various network devices (e.g., radio heads and access network controllers) or merged into a single network device (e.g., base station 105).

[0053] The wireless communication system 100 can operate using one or more frequency bands, for example, in the range of 300 megahertz (MHz) to 300 gigahertz (GHz). The 300 MHz to 3 GHz region is referred to as the ultra-high frequency (UHF) region or decimeter band because the wavelengths are in the range of about 1 decimeter to 1 meter long. UHF waves can be blocked or redirected by buildings and environmental features. However, these waves can penetrate various structures sufficiently for macro cells to provide services to UEs 115 located indoors. Transmission of UHF waves can be associated with smaller antennas and shorter ranges (e.g., less than 100 km) compared to transmission using lower frequencies and longer waves in the high frequency (HF) or very high frequency (VHF) portion of the spectrum below 300 MHz.

[0054] The wireless communication system 100 may also operate in the very high frequency (SHF) region using frequency bands from 3 GHz to 30 GHz, also known as centimeter bands. The SHF region includes frequency bands that may be opportunistically used by devices that may be able to tolerate interference from other users, such as the 5 GHz Industrial, Scientific, and Medical (ISM) band.

[0055] The wireless communication system 100 may also operate in the extremely high frequency (EHF) division of the spectrum (e.g., from 30 GHz to 300 GHz), which is also referred to as the millimeter band. In some examples, the wireless communication system 100 may support mmW communications between the UE 115 and the base station 105, and the EHF antenna of the corresponding device may be even smaller and more closely spaced than the UHF antenna. In some cases, this may facilitate the use of antenna arrays within the UE 115. However, the propagation of EHF transmissions may be subject to even greater atmospheric attenuation and shorter range than SHF or UHF transmissions. The technology disclosed herein may be adopted across transmissions using one or more different frequency divisions, and the use of frequency bands specified across these frequency divisions may vary by country or regulatory agency.

[0056] In some cases, the wireless communication system 100 may utilize both licensed and unlicensed radio frequency spectrum bands. For example, the wireless communication system 100 may employ license assisted access (LAA), LTE unlicensed (LTE-U) radio access technology, or NR technology in an unlicensed band (such as a 5 GHz ISM band). When operating in an unlicensed radio frequency spectrum band, wireless devices (such as base stations 105 and UE 115) may employ a listen-before-talk (LBT) procedure to ensure that the frequency channel is clear before transmitting data. In some cases, operations in unlicensed bands may be based on carrier aggregation configuration (e.g., LAA) in coordination with component carriers operating in licensed bands. Operations in unlicensed spectrum may include downlink transmissions, uplink transmissions, peer-to-peer transmissions, or a combination of these. Duplexing in unlicensed spectrum may be based on frequency division duplexing (FDD), time division duplexing (TDD), or a combination of the two.

[0057] In some examples, the base station 105 or the UE 115 may be equipped with multiple antennas, which may be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communication, or beamforming. For example, the wireless communication system 100 may use a transmission scheme between a transmitting device (e.g., the base station 105) and a receiving device (e.g., the UE 115), wherein the transmitting device is equipped with multiple antennas and the receiving device is equipped with one or more antennas. MIMO communication may employ multipath signal propagation to increase spectral efficiency by transmitting or receiving multiple signals via different spatial layers, which may be referred to as spatial multiplexing. For example, the transmitting device may transmit multiple signals via different antennas or different antenna combinations. Similarly, the receiving device may receive multiple signals via different antennas or different antenna combinations. Each of these multiple signals may be referred to as a separate spatial stream and may carry bits associated with the same data stream (e.g., the same codeword) or different data streams. Different spatial layers may be associated with different antenna ports for channel measurement and reporting. MIMO technology includes single-user MIMO (SU-MIMO), in which multiple spatial layers are transmitted to the same receiving device, and multi-user MIMO (MU-MIMO), in which multiple spatial layers are transmitted to multiple devices.

[0058] Beamforming (which may also be referred to as spatial filtering, directional transmission, or directional reception) is a signal processing technique that may be used at a transmitting device or a receiving device (e.g., a base station 105 or a UE 115) to shape or direct an antenna beam (e.g., a transmit beam or a receive beam) along a spatial path between the transmitting device and the receiving device. Beamforming may be achieved by combining signals communicated via antenna elements of an antenna array so that signals propagating at a particular orientation relative to the antenna array experience constructive interference, while other signals experience destructive interference. Adjustments to signals communicated via antenna elements may include the transmitting device or the receiving device applying a specific amplitude and phase shift to the signal carried via each antenna element associated with the device. The adjustments associated with each antenna element may be defined by a set of beamforming weights associated with a particular orientation (e.g., relative to the antenna array of the transmitting device or the receiving device, or relative to some other orientation).

[0059] In one example, the base station 105 may use multiple antennas or antenna arrays to perform beamforming operations for directional communication with the UE 115. For example, some signals (e.g., synchronization signals, reference signals, beam selection signals, or other control signals) may be transmitted multiple times by the base station 105 in different directions, which may include a signal being transmitted according to different beamforming weight sets associated with different transmission directions. The transmissions in different beam directions may be used (e.g., by the base station 105 or a receiving device, such as the UE 115) to identify the beam direction used by the base station 105 for subsequent transmission and / or reception.

[0060] Some signals, such as data signals associated with a particular recipient device, may be transmitted by base station 105 in a single beam direction (e.g., a direction associated with a recipient device, such as UE 115). In some examples, a beam direction associated with transmissions along a single beam direction may be determined based at least in part on signals transmitted in different beam directions. For example, UE 115 may receive one or more signals transmitted by base station 105 in different directions, and UE 115 may report to base station 105 an indication of the signals received by it with the highest signal quality or other acceptable signal quality. Although these techniques are described with reference to signals transmitted by base station 105 in one or more directions, UE 115 may use similar techniques for transmitting signals multiple times in different directions (e.g., for identifying a beam direction used by UE 115 for subsequent transmission or reception) or for transmitting signals in a single direction (e.g., for transmitting data to a recipient device).

[0061] A receiving device (e.g., UE 115, which may be an example of a mmW receiving device) may try multiple receive beams when receiving various signals (such as synchronization signals, reference signals, beam selection signals, or other control signals) from base station 105. For example, the receiving device may try multiple receive directions by receiving via different antenna subarrays, processing received signals according to different antenna subarrays, receiving according to different receive beamforming weight sets applied to signals received at multiple antenna elements of an antenna array, or processing received signals according to different receive beamforming weight sets applied to signals received at multiple antenna elements of an antenna array, any of which may be referred to as "listening" according to different receive beams or receive directions. In some examples, the receiving device may use a single receive beam to receive along a single beam direction (e.g., when receiving a data signal). The single receive beam may be aligned on a beam direction determined at least in part based on listening according to different receive beam directions (e.g., a beam direction determined to have the highest signal strength, highest signal-to-noise ratio, or other acceptable signal quality based at least in part on listening according to multiple beam directions).

[0062] In some cases, the antennas of a base station 105 or a UE 115 may be located within one or more antenna arrays that may support MIMO operations or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays may be co-located at an antenna assembly, such as an antenna tower. In some cases, the antennas or antenna arrays associated with a base station 105 may be located at different geographic locations. A base station 105 may have an antenna array having several rows and columns of antenna ports that the base station 105 may use to support beamforming for communications with a UE 115. Likewise, a UE 115 may have one or more antenna arrays that may support various MIMO or beamforming operations.

[0063] In some cases, the wireless communication system 100 can be a packet-based network that operates according to a layered protocol stack. In the user plane, the communication of the bearer or packet data convergence protocol (PDCP) layer can be IP-based. The radio link control (RLC) layer can perform packet segmentation and reassembly to communicate on the logical channel. The media access control (MAC) layer can perform priority handling and multiplex logical channels into transport channels. The MAC layer can also use hybrid automatic repeat request (HARQ) to provide retransmission of the MAC layer, thereby improving link efficiency. In the control plane, the radio resource control (RRC) protocol layer can provide the establishment, configuration and maintenance of the RRC connection of the radio bearer supporting user plane data between the UE 115 and the base station 105 or the core network 130. In the physical layer, the transport channel can be mapped to the physical channel.

[0064] In some cases, UE 115 and base station 105 may support retransmission of data to increase the likelihood that the data is successfully received. HARQ feedback is a technique that increases the likelihood of correctly receiving data on communication link 125. HARQ may include a combination of error detection (e.g., using cyclic redundancy check (CRC)), forward error correction (FEC), and retransmission (e.g., automatic repeat request (ARQ)). HARQ can improve the throughput of the MAC layer in poor radio conditions (e.g., signal-to-noise ratio conditions). In some cases, a wireless device may support simultaneous slot HARQ feedback, where the device may provide HARQ feedback in a specific time slot for data received in a previous symbol in the time slot. In other cases, the device may provide HARQ feedback in a subsequent time slot or according to some other time interval.

[0065] The time interval in LTE or NR can be represented by a basic time unit (which may refer to a sampling period T, for example). s =1 / 30,720,000 seconds). The time intervals of the communication resources may be organized according to radio frames each having a duration of 10 milliseconds (ms), where the frame period may be expressed as T f =307,200Ts . A radio frame may be identified by a system frame number (SFN) ranging from 0 to 1023. Each frame may include 10 subframes numbered from 0 to 9, and each subframe may have a duration of 1 ms. A subframe may be further divided into 2 slots, each slot having a duration of 0.5 ms, and each slot may contain 6 or 7 modulation symbol periods (e.g., depending on the length of a cyclic prefix prepended to each symbol period). Excluding the cyclic prefix, each symbol period may contain 2048 sampling periods. In some cases, a subframe may be the minimum scheduling unit of the wireless communication system 100 and may be referred to as a transmission time interval (TTI). In other cases, the minimum scheduling unit of the wireless communication system 100 may be shorter than a subframe or may be dynamically selected (e.g., in a burst of a shortened TTI (sTTI) or in a selected component carrier using sTTI).

[0066] In some wireless communication systems, a time slot may be further divided into a plurality of mini-slots containing one or more symbols. In some instances, a symbol of a mini-slot or a mini-slot may be the minimum scheduling unit. For example, each symbol may vary in duration depending on the subcarrier spacing or the operating frequency band. Further, some wireless communication systems may implement time slot aggregation, wherein a plurality of time slots or mini-slots are aggregated together and used for communication between UE 115 and base station 105.

[0067] The term "carrier" refers to a set of radio frequency spectrum resources having a defined physical layer structure for supporting communications on the communication link 125. For example, a carrier of the communication link 125 may include a portion of a radio frequency spectrum band that operates according to a physical layer channel for a given radio access technology. Each physical layer channel may carry user data, control information, or other signaling. A carrier may be associated with a predefined frequency channel (e.g., an Evolved Universal Mobile Telecommunications System Terrestrial Radio Access (E-UTRA) Absolute Radio Frequency Channel Number (EARFCN)) and may be located according to a channel grid for discovery by a UE 115. A carrier may be a downlink or an uplink (e.g., in an FDD mode), or may be configured to carry downlink communications and uplink communications (e.g., in a TDD mode). In some examples, a signal waveform transmitted on a carrier may include multiple subcarriers (e.g., using a multi-carrier modulation (MCM) technique such as orthogonal frequency division multiplexing (OFDM) or DFT-S-OFDM).

[0068] For different radio access technologies (e.g., LTE, LTE-A, LTE-A Pro, NR), the organizational structure of the carrier can be different. For example, the communication on the carrier can be organized according to TTIs or time slots, each of which can include user data and control information or signaling to support decoding of the user data. The carrier can also include dedicated acquisition signaling (e.g., synchronization signals or system information, etc.) and control signaling to coordinate the operation of the carrier. In some examples (e.g., in a carrier aggregation configuration), the carrier may also have acquisition signaling or control signaling to coordinate the operation of other carriers.

[0069] Physical channels may be multiplexed on a carrier according to various techniques. Physical control channels and physical data channels may be multiplexed on a downlink carrier, for example, using a time division multiplexing (TDM) technique, a frequency division multiplexing (FDM) technique, or a hybrid TDM-FDM technique. In some examples, control information transmitted in a physical control channel may be distributed in a cascaded manner between different control regions (e.g., between a common control region or a common search space and one or more UE-specific control regions or UE-specific search spaces).

[0070] A carrier may be associated with a particular bandwidth of the radio frequency spectrum, and in some examples, the carrier bandwidth may be referred to as the "system bandwidth" of the carrier or wireless communication system 100. For example, the carrier bandwidth may be one of several predetermined bandwidths of a carrier for a particular radio access technology (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 MHz). In some examples, each served UE 115 may be configured to operate on part or all of the carrier bandwidth. In other examples, some UEs 115 may be configured to operate using a narrowband protocol type associated with a predefined portion or range (e.g., a set of subcarriers or RBs) within a carrier (e.g., an "in-band" deployment of a narrowband protocol type).

[0071] In a system using MCM technology, a resource element may include a symbol period (e.g., the duration of a modulation symbol) and a subcarrier, where the symbol period and the subcarrier spacing are inversely related. The number of bits carried by each resource element may depend on the modulation scheme (e.g., the order of the modulation scheme). Thus, the more resource elements received by UE 115 and the higher the order of the modulation scheme, the higher the data rate of UE 115 can be. In a MIMO system, wireless communication resources may refer to a combination of radio frequency spectrum resources, time resources, and space resources (e.g., space layers), and the use of multiple space layers may further increase the data rate of communication with UE 115.

[0072] A device (e.g., base station 105 or UE 115) of wireless communication system 100 may have a hardware configuration that supports communication on a particular carrier bandwidth, or may be configurable to support communication on one of a set of carrier bandwidths. In some examples, wireless communication system 100 may include base stations 105 and / or UEs 115 that support simultaneous communication via carriers associated with more than one different carrier bandwidths.

[0073] The wireless communication system 100 may support communication with the UE 115 on multiple cells or carriers, a feature that may be referred to as carrier aggregation or multi-carrier operation. The UE 115 may be configured with multiple downlink component carriers and one or more uplink component carriers according to a carrier aggregation configuration. Carrier aggregation may be used with both FDD and TDD component carriers.

[0074] In some cases, the wireless communication system 100 may utilize an enhanced component carrier (eCC). An eCC may be characterized by one or more features including a wider carrier or frequency channel bandwidth, a shorter symbol duration, a shorter TTI duration, or a modified control channel configuration. In some cases, an eCC may be associated with a carrier aggregation configuration or a dual connectivity configuration (e.g., when multiple serving cells have suboptimal or non-ideal backhaul links). An eCC may also be configured for use in an unlicensed spectrum or a shared spectrum (e.g., where more than one operator is allowed to use the spectrum). An eCC characterized by a wide carrier bandwidth may include one or more segments that may be utilized by a UE 115 that is not capable of monitoring the entire carrier bandwidth or is otherwise configured to use a limited carrier bandwidth (e.g., to save power).

[0075] In some cases, an eCC may utilize a different symbol duration than other component carriers, which may include using a reduced symbol duration compared to the symbol duration of other component carriers. A shorter symbol duration may be associated with an increased spacing between adjacent subcarriers. A device utilizing an eCC (such as a UE 115 or a base station 105) may transmit a wideband signal (e.g., according to a frequency channel or carrier bandwidth of 20, 40, 60, 80 MHz, etc.) with a reduced symbol duration (e.g., 16.67 microseconds). A TTI in an eCC may include one or more symbol periods. In some cases, the TTI duration (i.e., the number of symbol periods in a TTI) may be variable.

[0076] The wireless communication system 100 may be an NR system that may utilize any combination of licensed, shared, and unlicensed spectrum bands, etc. The flexibility of eCC symbol duration and subcarrier spacing may allow eCC to be used across multiple spectrums. In some examples, NR shared spectrum may improve spectrum utilization and spectrum efficiency, particularly through dynamic vertical (e.g., across frequency domain) and horizontal (e.g., across time domain) sharing of resources.

[0077] In some aspects, a wireless device (e.g., UE 115) may include a communication manager 101 configured to operate in a first mode on a radio frequency spectrum band in a wireless network. The communication manager 101 may be configured to receive a signal indicating that a value of the radio frequency spectrum band has satisfied a threshold. The communication manager 101 may be configured to switch from the first mode to a second mode for wireless communication in the wireless network based at least in part on the signal indicating that the value has satisfied the threshold, wherein a first length of a first SSB associated with the first mode is shorter than a second length of a second SSB associated with the second mode.

[0078] In some aspects, a wireless device (e.g., a base station 105) may include a communication manager 101 configured to operate in a first mode on a radio frequency spectrum band in a wireless network. The communication manager 101 may be configured to receive a signal indicating that a value of the radio frequency spectrum band has satisfied a threshold. The communication manager 101 may be configured to switch from a first path loss mode to a second mode for wireless communication in the wireless network based at least in part on the signal indicating that the value has satisfied the threshold, wherein a first length of a first SSB associated with the first mode is shorter than a second length of a second SSB associated with the second mode.

[0079] Figure 2 An example of a wireless communication system 200 that supports the use of a high path loss mode according to one or more aspects of the present disclosure is illustrated. In some examples, the wireless communication system 200 may implement aspects of the wireless communication system 100. The wireless communication system 200 may include a first wireless device 205, a second wireless device 210, and a third wireless device 215, each of which may be an example of a base station and / or UE as described herein. In some aspects, the wireless communication system 200 may be a mmW wireless network. In some aspects, one or more of the first wireless device 205, the second wireless device 210, and / or the third wireless device 215 may be an example of a node in an IAB network. In some aspects, the wireless communication system 200 may be implemented on a shared or unlicensed radio frequency spectrum band.

[0080] Wireless networks rely on wireless transmissions that propagate over paths between wireless devices. The properties of the propagation paths may vary due to mobility, interference, hidden nodes, obstructions, etc., such that the wireless devices must overcome path loss to ensure continued wireless communication. Some wireless networks are configured to adjust various communication parameters in response to relatively minor changes in the propagation paths. However, in some instances, path loss values ​​may exceed the capabilities of such technologies, which may result in loss of communication between wireless devices.

[0081] As a non-limiting example, mmW wireless networks may be considered an economically viable option, for example, to provide backhaul services as an alternative to wired backhaul services (such as on fiber optic networks). Wireless backhaul options may be helpful to developing countries that lack existing wired infrastructure and / or to developed countries due to the high cost of deploying new wired infrastructure.

[0082] However, backhaul services may have associated high reliability requirements. This may mean maintaining the reliability of wireless communications during all weather conditions, propagation path changes, etc. However, the nature of mmW propagation is such that path loss may increase significantly, for example, 30 dB or more in certain weather conditions (such as heavy rain). As a non-limiting example, mmW wireless backhaul link distances between 1-3.5 kilometers may be deployed, where path loss values ​​of 120 dB to 132 dB are generated at 28 GHz due to such link distances. Heavy rain in this example may increase by another 30 dB, 45 dB or more (depending on link target reliability and distance), which may result in a total path loss in the range of 165 dB to 180 dB. However, some wireless technologies are not configured to support such high path losses. In addition, other changes in the link budget may interrupt the mmW backhaul network. For example, the loss of a power amplifier may cause the transmission power level to drop to exceed a threshold, for example, this may change the link budget due to the lack of a power amplifier. Some wireless technologies are also not configured to support such significant interruptions in the link budget. Accordingly, aspects of the described techniques provide a mechanism to maintain link budget in challenging environments by employing a high path loss mode (eg, the second mode) for a wireless device.

[0083] It should be understood that the described techniques are not limited to mmW networks and / or wireless backhaul communications. For example, aspects of the described techniques may be implemented by any wireless device (e.g., such as any base station and / or UE) operating in a wireless network (e.g., a Wi-Fi network, an LTE / LTE-A network, an NR / 5G network, etc.). The wireless device may implement the described techniques in any wireless network that experiences high path loss values ​​to ensure continued wireless communication on the network. The wireless device may implement the described techniques on licensed radio frequency spectrum bands and / or shared or unlicensed radio frequency spectrum bands.

[0084] The described techniques may include any of the first wireless device 205, the second wireless device 210, and / or the third wireless device 215 operating in at least two modes: a low (normal) path loss mode (which may be referred to as a first mode) and a high mode (which may be referred to as a second mode). Broadly, any of the wireless devices of the wireless communication system 200 may simultaneously use any combination of these two modes to communicate with different nodes.

[0085] For example, the first wireless device 205 may operate in the wireless communication system 200 in a first mode (at least initially) on a radio frequency spectrum band with the second wireless node 210 and / or the third wireless node 215. Upon determining that the value of the radio frequency spectrum band has met (or exceeded) a threshold, the first wireless device 205 may switch from the first mode to the second mode for wireless communication.

[0086] In some aspects, the determination to switch from the first mode to the second mode may be autonomous. For example, the first wireless device 205 may receive a signal indicating that the value of the radio frequency spectrum band has met (or exceeded) a threshold. The first wireless device 205 may perform wireless communications with the second wireless device 210 and / or the third wireless device 215 on the radio frequency spectrum band. The wireless communications being performed may include access communications (e.g., data and / or control information) and / or backhaul communications.

[0087] The first wireless device 205 may monitor channel performance on a periodic or real-time basis, which may include monitoring values ​​(e.g., path loss values, transmission power levels, etc.) between the first wireless device 205 and the second wireless device 210 and / or the first wireless device 205 and the third wireless device 215. The first wireless device 205 may monitor the value by performing various channel measurements and / or by receiving feedback signaling from the second wireless device 210 and / or the third wireless device 215, such as a channel quality indicator (CQI) report or some other channel performance metric. In this context, the signal received by the first wireless device 205 indicating that the value has met (or exceeded) the threshold may include any signal received from the second wireless device 210 and / or the third wireless device 215 during normal wireless communication. The first wireless device 205 may monitor the transmission power levels of the first wireless device 205, the second wireless device 210, and / or the third wireless device 215 to determine whether a change in the transmission power level (which may significantly affect the link budget) may indicate that a change in mode is warranted. Accordingly, the first wireless device 205 can know or otherwise determine when the value meets (or exceeds) the threshold.

[0088] In some aspects, the determination to switch from the first mode to the second mode can be based on an indication received from the second wireless device 210 and / or the third wireless device 215. For example, the second wireless device 210 (in the example illustrated in the wireless communication system 200) can transmit a signal to the first wireless device 205 that carries or otherwise communicates an indication that a value of the radio frequency spectrum band has met (or exceeded) a threshold. That is, the signal can carry one or more bits, fields, etc. that explicitly indicate the value (the second wireless device 210 has switched from the first mode to the second mode), and / or some other implicit indication that the value meets (or exceeds) a threshold. In some aspects, the signal indicating that the value has met (or exceeded) a threshold can be in-band signaling, out-of-band signaling, a broadcast signal, a unicast signal, etc.

[0089] An example of switching from a first mode to a second mode can be based on an expectation of a change in weather conditions. For example, the first wireless device 205, the second wireless device 210, and / or the third wireless device 215 can monitor weather conditions (current and / or predicted) and determine that the weather conditions have (or will likely) degrade the channel performance / link budget so that the value meets (or exceeds) a threshold. Based on the expected rise in the value, the wireless device may determine or otherwise decide to switch from the first mode to the second mode. Accordingly, the wireless device may transmit a signal to other wireless devices indicating its intention to switch from the first mode to the second mode based on the change in mode. The signal may be transmitted in a unicast manner to a specific wireless device (e.g., from the second wireless device 210 to the first wireless device 205, or vice versa), or may be broadcast so that all other wireless devices can be notified of the switch.

[0090] In one example, determining whether to use in-band or out-of-band signaling to transmit a signal indicating that the value has met (or exceeded) the threshold can be based on various factors, such as, for example, the congestion level of a particular radio frequency spectrum band, the resource cost associated with communicating on a particular radio frequency spectrum band, the link status between wireless devices on a particular radio frequency spectrum band, etc. For example, a wireless device of the wireless communication system 200 may perform wireless communication in a first radio frequency spectrum band (e.g., a mmW radio frequency spectrum band), but may utilize a second radio frequency spectrum band (e.g., a sub-6 GHz radio frequency spectrum band) to transmit a signal to other wireless devices that it intends to switch to a second mode.

[0091] In one example, this may be caused by a link failure in a first radio frequency spectrum band associated with a high value. For example, a value with respect to the first radio frequency spectrum band may suddenly exceed a value supportable by the first mode, which may result in a link failure on the first radio frequency spectrum band. Accordingly, the wireless device may switch from the first mode to the second mode on the first radio frequency spectrum band and transmit a signal to other wireless devices on the second radio frequency spectrum band to signal or otherwise indicate an intent to switch to the second mode in the first radio frequency spectrum band. In some aspects, the wireless device may set a priority level for the signal indicating its intent to switch to the second mode to a high level to ensure that it is received by other wireless devices.

[0092] Accordingly, the first wireless device 205 and / or the second wireless device 210 may determine to switch from the first mode to the second mode, e.g., from a normal or low path loss mode to a high path loss mode. Broadly, the second mode may include various parameters (alone or in any combination) that support continued wireless communication over a radio frequency spectrum band that experiences a value that has met (or exceeded) a threshold path loss value.

[0093] Examples of such parameters include, but are not limited to, MCS, HARQ, SSB, CSI-RS, demodulation reference signal (DMRS), aggregation level, bandwidth, beam width (or beam selection), etc. For example, the length of the SSB in the first mode (e.g., the amount of time / frequency resources allocated to SSB transmission) can be shorter than the length of the SSB in the second mode. In some examples, the length of the SSB in the second mode can be increased by a factor of 2, 5, 10, etc., compared to the length of the SSB in the first mode. Similarly, the lengths of various reference signals (e.g., CSI-RS, DMRS, etc.) can be shorter in the first mode than in the second mode (e.g., a factor of 2, 5, 10, etc.).

[0094] Another example of such a parameter may include the MCS utilized in the first mode being higher than the MCS utilized in the second mode. For example, each mode may be associated with a set of available MCSs, where each MCS corresponds to a combination of a coding rate and a modulation scheme. In some aspects, each MCS scheme in the first set of modes may be higher than each MCS scheme in the second set of modes. In this context, "higher" may mean that the coding rate is larger (e.g., half versus one quarter) and the modulation constellation is larger (e.g., 64 quadrature amplitude modulation (QAM) versus quadratic phase shift keying (QPSK)).

[0095] Another example of such a parameter may include a bandwidth utilized in the first mode being wider than the bandwidth utilized in the second mode. That is, the second mode may utilize a narrower bandwidth to improve wireless communication over the radio frequency spectrum band. In some aspects, the selection of a particular channel for the second mode may be based on the performance of that channel compared to other channels utilized in the wider bandwidth of the first mode. In some aspects, the operating bandwidth utilized in the second mode for SSB, random access channel (RACH) signals, etc. may be narrower than the bandwidth utilized in the first mode.

[0096] Another example of such a parameter may include a beamwidth of the first mode being narrower than a beamwidth utilized by the second mode. For example, the second mode may utilize a narrower beamwidth (e.g., a P3 beam as opposed to a P2 beam, or a P2 beam as opposed to a P1 beam) to improve directionality when communicating in the second mode. However, in another example, the beamwidth of the second mode may be wider than the beamwidth used in the first path loss mode. For example, the wireless device may determine that the narrow beamwidth is experiencing high path loss (e.g., due to mobility, obstruction, etc.) and switch to a wider beamwidth for communication when operating in the second mode. Although a wider beamwidth may have less directionality, the associated coverage area may improve detection of other wireless devices.

[0097] Another example of such a parameter may include the aggregation level utilized in the first mode being lower than the aggregation level utilized in the second mode. For example, the aggregation level utilized in the second mode may be increased by a factor of 2, 5, 10, etc., than the aggregation level utilized in the first mode.

[0098] In some aspects, such system parameters may be based on the type of information being communicated. For example and for data channels (e.g., physical downlink shared channel (PDSCH), physical uplink shared channel (PUSCH), etc.), the MCS and HARQ operation of the data channel may be selected to be more conservative, such as by introducing one or more high path loss MCSs potentially coupled with corresponding HARQ parameters. This may allow the data channel to overcome high path loss when operating in the second mode. As another example and for control channels (e.g., physical downlink control channel (PDCCH), physical uplink control channel (PUCCH), etc.), the SSB, CSI-RS, etc. of the second mode may be ten times longer than, for example, the SSB, CSI-RS, etc. of the first mode. For example, the DMRS of the control channel and the data channel may be 10 times longer in the time domain in the second mode than in the first mode. Similarly, the PDCCH may have an aggregation level in the second mode that actually represents, for example, an MCS ten times lower than the MCS of the first mode. As discussed, the operating bandwidth of the SSB, RACH, etc. in the second mode may be much narrower than the first mode.

[0099] Accordingly, the first wireless device 205 and the second wireless device 210 can switch from the first mode to the second mode to continue wireless communication over the radio frequency spectrum band. As discussed, the wireless devices of the wireless communication system 200 can be configured to operate with separate wireless devices in both the first mode and the second mode simultaneously. As illustrated, the first wireless device 205 can operate in the second mode relative to the second wireless device 210, but can operate in the first mode relative to the third wireless device 215.

[0100] In some aspects, wireless devices of the wireless communication system 200 may utilize aspects of the described techniques to switch back to the first mode, such as, for example, when the value drops below a threshold.

[0101] Figure 3 An example of a wireless communication system 300 that supports the use of a high path loss mode according to one or more aspects of the present disclosure is illustrated. In some examples, the wireless communication system 300 may implement aspects of the wireless communication systems 100 and / or 200. The wireless communication system 300 may include base stations 305, 310, and 315 and UEs 330, 340, and 350, which may be examples of corresponding devices described herein. In some aspects, the wireless communication system 300 may operate on a mmW radio frequency spectrum band. In some aspects, any of the base stations 305, 310, 315 and / or UEs 330, 340, 350 may be an example of a wireless device as described herein. In some aspects, any of the base stations 305, 310, 315 and / or UEs 330, 340, 350 may implement aspects of the described technology on a licensed radio frequency spectrum band and / or a shared or unlicensed radio frequency spectrum band.

[0102] In some aspects, the wireless communication system 300 may be an example of an IAB network. For example, base stations 305, 310, and 315 may be nodes within the IAB network. Accordingly, base station 305 may communicate with base station 310 on backhaul link 320, and vice versa. Base station 310 may communicate with base station 315 on backhaul link 325 and / or communicate with UE 330 on access link 335, or vice versa. Base station 315 may communicate with UE 340 on access link 345 and / or communicate with UE 350 on access link 355, or vice versa. In some aspects, one or more of backhaul links 320 and / or 325 may operate on mmW radio frequency spectrum bands. In this example, base stations 305, 310, and / or 315 may also have additional links (not shown), such as sub-6 GHz radio frequency spectrum band links.

[0103] As discussed, aspects of the described technology enable support for wireless communications on a radio frequency spectrum band in a high path loss / low transmission power level environment by utilizing a second mode (e.g., a high path loss mode). The second mode can utilize various parameters (e.g., MCS, HARQ, aggregation level, reference signal, etc.) that are configured or otherwise selected to support wireless communications on a radio frequency spectrum band that experiences a value that meets (or exceeds) a threshold.

[0104] Initially, any wireless device of the wireless communication system 300 may operate according to a first mode (e.g., a low path loss mode or a normal mode) on a radio frequency spectrum band. The wireless device may receive a signal carrying or otherwise conveying an indication that a value of the radio frequency spectrum band has met (or exceeded) a threshold.

[0105] In one example, the wireless device may receive a signal and autonomously determine that the value has met (or exceeded) a threshold path loss value, thereby switching from a first mode to a second mode. In this context, a signal may refer to any signal being communicated between wireless devices of the wireless communication system 300. That is, the wireless device may monitor the channel performance of the radio frequency spectrum band for ongoing communications between itself and other wireless devices. In one example, this may include the wireless device receiving a signal that carries or otherwise conveys an indication of channel performance feedback information (e.g., CQI information, transmission power level, or some other channel performance metric). In another example, this may include the wireless device monitoring the received power level of the signal communicated between the wireless devices. When the received power level of one or more signals exchanged during the ongoing communication is equal to or lower than a threshold level, this may indicate that the path loss value has met (or exceeded) the threshold path loss value.

[0106] In some aspects, the signal indicating that the value has met (or exceeded) the threshold can be a signal from the other wireless device indicating that the value has met the threshold and / or the other wireless device is switching from the first mode to the second mode. The signal can be received using in-band signaling, out-of-band signaling, unicast signaling, broadcast signaling, etc.

[0107] Based on the signal being received indicating that the value of the radio frequency spectrum band has met (or exceeded) the threshold, the wireless device can switch from the first mode to the second mode on the radio frequency spectrum band for wireless communication. In some aspects, the wireless device can also transmit its own signal to other wireless devices (e.g., upstream wireless devices and / or downstream wireless devices) to indicate its intention to switch from the first mode to the second mode.

[0108] As discussed, various parameters utilized during wireless communication may be different between the first mode and the second mode. For example, the SSB of the first mode may be shorter (e.g., in time and / or frequency resources) than the SSB in the second mode. Additionally or alternatively, the reference signal (e.g., CSI-RS, DMRS, etc.) of the first mode may be shorter (e.g., in time and / or frequency resources) than the reference signal of the second mode. Additionally or alternatively, the MCS of the first mode may be higher than the MCS of the second mode. Additionally or alternatively, the bandwidth of the first mode may be wider than the bandwidth of the second mode. Additionally or alternatively, the beamwidth of the first mode may be narrower (or in some instances wider) than the beamwidth of the second mode.

[0109] Accordingly, a wireless device switched to the second mode in the wireless communication system 300 can continue to perform wireless communications on the radio frequency spectrum band in a high path loss environment. As discussed, the wireless device can perform wireless communications simultaneously with each other wireless device according to the first mode. For example, base stations 305 and 310 can perform wireless communications according to the second mode on the backhaul link 320, wherein base stations 310 and 315 can perform wireless communications according to the first mode on the backhaul link 325. Base stations 310 and / or 315 can perform wireless communications with UEs 330, 340, and / or 350 on access links 335, 345, and / or 355 according to the first mode or the second mode, respectively (e.g., depending on the path loss value / transmission power level of each corresponding link).

[0110] Figure 4 An example of a process 400 for supporting the use of a high path loss mode in accordance with one or more aspects of the present disclosure is illustrated. In some examples, the process 400 may implement aspects of wireless communication systems 100, 200, and / or 300. Aspects of the process 400 may be implemented by a first wireless device 405 and / or a second wireless device 410, which may be examples of a base station and / or a UE as described herein. Aspects of the process 400 may be implemented on a wireless network, such as a mmW radio frequency spectrum band. Aspects of the process 400 may be implemented on an IAB network. Aspects of the process 400 may be implemented on a licensed radio frequency spectrum band and / or a shared or unlicensed radio frequency spectrum band.

[0111] At 415, the first wireless device 405 and the second wireless device 410 may operate (e.g., perform ongoing wireless communications) in a first mode in a wireless network over a radio frequency spectrum band. The first mode may have: an associated first SSB having a first SSB length (in time and / or frequency resources), an associated first reference signal having a first reference signal length, an associated first MCS, an associated first bandwidth, an associated first beamwidth, etc.

[0112] At 420, the first wireless device 405 may receive (and the second wireless device 410 may transmit) a signal carrying or otherwise conveying an indication that the value of the radio frequency spectrum band has met (or exceeded) a threshold.

[0113] In some aspects, the signal may be any signal (e.g., a signal in an uplink, downlink, backhaul, access, etc.) exchanged during ongoing communications between the first wireless device 405 and the second wireless device 410. Accordingly, the first wireless device 405 may measure a received power level of the signal and determine that the received power level is at or below a threshold level. A received power level at or below a threshold may provide an indication that a path loss value has met (or exceeded) a threshold path loss value.

[0114] In some aspects, the signal may convey an indication that the value has met (or exceeded) a threshold explicitly and / or implicitly. For example, the signal may explicitly indicate the value and / or may indicate that the second wireless device 410 is switching to operate according to the second mode. In another example, the signal may carry or convey an indication of channel performance feedback (e.g., CQI) indicating that the value of the radio frequency spectrum band has met (or exceeded) a threshold.

[0115] In some aspects, the signal may be transmitted using in-band signaling (e.g., using the same radio frequency spectrum band used for ongoing wireless communications between the first wireless device 405 and the second wireless device 410). In some aspects, the signal may be transmitted using out-of-band signaling (e.g., using a different radio frequency spectrum band than used for ongoing wireless communications between the first wireless device 405 and the second wireless device 410). In some aspects, the signal may be a unicast signal (e.g., a signal transmitted in a unicast transmission from the second wireless device 410 to the first wireless device 405). In some aspects, the signal may be a broadcast signal (e.g., a signal transmitted in a broadcast transmission from the second wireless device 410 to any other wireless devices communicating on the radio frequency spectrum band).

[0116] At 425, the first wireless device 405 may switch from the first mode to the second mode for wireless communication in the wireless network based at least in part on the signal indicating that the value has met (or exceeded) the threshold. In some aspects, the length of the first SSB associated with the first mode may be shorter (e.g., in time and / or frequency resources) than the length of the second SSB associated with the second mode. Additionally or alternatively, the length of the first reference signal associated with the first mode may be shorter (also in time and / or frequency resources) than the length of the second reference signal associated with the second mode. Additionally or alternatively, the MCS of the first mode may be higher than the MCS of the second mode. Other system parameters may be selected to support ongoing communication between the first wireless device 405 and the second wireless device 410 in the second mode.

[0117] It should be understood that the second wireless device 410 may also switch from the first mode to the second mode. For example, the second wireless device 410 may receive a signal (not shown) from the first wireless device 405 indicating (explicitly and / or implicitly) that the value of the radio frequency spectrum band has met (or exceeded) a threshold. The second wireless device 410 may switch to the second mode based at least in part on the signal. Accordingly, the first wireless device 405 and the second wireless device 410 may continue to perform wireless communications on the radio frequency spectrum band in the wireless network according to the second mode.

[0118] It should also be understood that the first wireless device 405 and / or the second wireless device 410 may also switch from the second mode back to the first mode. For example, the first wireless device 405 and / or the second wireless device 410 may continue to monitor the channel performance of the radio frequency spectrum band and determine that the value has dropped below the threshold. Accordingly, either or both devices may switch back to the first mode based on the determination. Either or both wireless devices may also transmit a signal to the other wireless device to indicate its intention to switch back to the first mode and / or to indicate that the value has fallen below (or cannot meet) the threshold.

[0119] Figure 5 A block diagram 500 of a device 505 supporting the use of a high path loss mode according to one or more aspects of the present disclosure is shown. The device 505 may be an example of aspects of a UE 115, a wireless device, or a base station 105 as described herein. The device 505 may include a receiver 510, a communication manager 515, and a transmitter 520. The device 505 may also include a processor. Each of these components may be in communication with each other (e.g., via one or more buses).

[0120] Receiver 510 may 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 support of high path loss modes, etc.). The information may be passed to other components of device 505. Receiver 510 may be a reference Figure 8 and 9 Examples of aspects of the described transceiver 820 or 920. The receiver 510 may utilize a single antenna or a collection of antennas.

[0121] The communication manager 515 can operate in a first mode on a radio frequency spectrum band in a wireless network; receive a signal indicating that a value of the radio frequency spectrum band has satisfied a threshold; and switch from the first mode to a second mode for wireless communication in the wireless network based on the signal indicating that the value has satisfied the threshold, wherein a first length of a first SSB associated with the first mode is shorter than a second length of a second SSB associated with the second mode. The communication manager 515 can be an example of aspects of the communication manager 810 or the communication manager 910 as described herein.

[0122] The communication manager 515 or its subcomponents may be implemented in hardware, in code (e.g., software or firmware) executed by a processor, or any combination thereof. If implemented in code executed by a processor, the functions of the communication manager 515 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 the present disclosure, discrete gate or transistor logic, discrete hardware components, or any combination thereof.

[0123] The communication manager 515 or its subcomponents may be physically located at various locations, including being distributed such that portions of 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 515 or its subcomponents may be separate and distinct components. In some examples, according to various aspects of the present disclosure, the communication manager 515 or its subcomponents may 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).

[0124] Transmitter 520 may transmit signals generated by other components of device 505. In some examples, transmitter 520 may be co-located with receiver 510 in a transceiver module. For example, transmitter 520 may be a reference Figure 8 and 9 Examples of aspects of the described transceiver 820 or 920. The transmitter 520 may utilize a single antenna or a collection of antennas.

[0125] Figure 6A block diagram 600 of a device 605 supporting use of a high path loss mode according to one or more aspects of the present disclosure is shown. The device 605 may be an example of aspects of a device 505, a wireless device, a UE 115, or a base station 105 as described herein. The device 605 may include a receiver 610, a communication manager 615, and a transmitter 635. The device 605 may also include a processor. Each of these components may be in communication with each other (e.g., via one or more buses).

[0126] Receiver 610 may 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 support of high path loss modes, etc.). The information may be passed to other components of device 605. Receiver 610 may be a reference Figure 8 and 9 Examples of aspects of the described transceiver 820 or 920. The receiver 610 may utilize a single antenna or a collection of antennas.

[0127] The communication manager 615 may be an example of aspects of the communication manager 515 as described herein. The communication manager 615 may include a path loss mode manager 620, a path loss value threshold manager 625, and a path loss mode switching manager 630. The communication manager 615 may be an example of aspects of the communication manager 810 or the communication manager 910 as described herein.

[0128] The path loss pattern manager 620 can operate in a first mode on a radio frequency spectrum band in a wireless network.

[0129] The path loss value threshold manager 625 may receive a signal indicating that the value of the RF spectrum band has met a threshold.

[0130] The path loss mode switching manager 630 can switch from a first mode to a second mode for wireless communication in a wireless network based on the signal indicating that the value has satisfied a threshold, wherein a first length of a first SSB associated with the first mode is shorter than a second length of a second SSB associated with the second mode.

[0131] The transmitter 635 can transmit signals generated by other components of the device 605. In some examples, the transmitter 635 can be co-located with the receiver 610 in a transceiver module. For example, the transmitter 635 can be a reference Figure 8 and 9 Examples of aspects of the described transceiver 820 or 920. The transmitter 635 may utilize a single antenna or a collection of antennas.

[0132] Figure 7A block diagram 700 of a communication manager 705 supporting the use of a high path loss mode in accordance with one or more aspects of the present disclosure is shown. The communication manager 705 may be an example of aspects of the communication manager 515, the communication manager 615, or the communication manager 810 described herein. The communication manager 705 may include a path loss mode manager 710, a path loss value threshold manager 715, a path loss mode switching manager 720, an IAB network manager 725, an autonomous path loss mode switching manager 730, and a path loss mode indication manager 735. Each of these modules may communicate directly or indirectly with each other (e.g., via one or more buses).

[0133] The path loss pattern manager 710 can operate in a first mode on a radio frequency spectrum band in a wireless network.

[0134] The path loss value threshold manager 715 may receive a signal indicating that the value of the radio frequency spectrum band has met a threshold. In some cases, the signal includes at least one of an in-band signal, an out-of-band signal, a broadcast signal, a unicast signal, or a combination thereof.

[0135] The path loss mode switching manager 720 can switch from the first mode to the second mode for wireless communication in the wireless network based on the signal indicating that the value has met the threshold, wherein the first length of the first SSB associated with the first mode is shorter than the second length of the second SSB associated with the second mode. In some cases, the first length of the first reference signal associated with the first mode is shorter than the second length of the second reference signal associated with the second mode. In some cases, the first MCS associated with the first mode is higher than the second MCS associated with the second mode. In some cases, the first bandwidth associated with the first mode is wider than the second bandwidth associated with the second mode. In some cases, the first beam width associated with the first mode is narrower than the second beam width associated with the second mode.

[0136] The IAB network manager 725 may perform wireless backhaul communication with a second wireless device of the IAB network according to the second mode. In some examples, the IAB network manager 725 may perform wireless backhaul communication with a third wireless device of the IAB network according to the first mode or the second mode. In some cases, the wireless network includes the IAB network.

[0137] In some cases, the value comprises a path loss value and the threshold comprises a threshold path loss value. The autonomous path loss mode switch manager 730 may determine that the signal is received at a received power level below a threshold level, wherein the signal being received at a received power level below the threshold level indicates that the path loss value has exceeded the threshold path loss value.

[0138] The path loss pattern indication manager 735 may transmit an indication to one or more other wireless devices that the wireless device has switched to the second mode. In some examples, the path loss pattern indication manager 735 may decode the signal to determine that the value has exceeded a threshold.

[0139] Figure 8 A diagram of a system 800 including a device 805 supporting use of a high path loss mode according to one or more aspects of the present disclosure is shown. The device 805 may be an example of a device 505, a wireless device, a device 605, or a UE 115 as described herein or include components of the above devices. The device 805 may include components for two-way voice and data communications, including components for transmitting and receiving communications, including a communication manager 810, a transceiver 820, an antenna 825, a memory 830, a processor 840, and an I / O controller 850. These components may be in electronic communication via one or more buses (e.g., a bus 855).

[0140] The communication manager 810 can operate in a first mode on a radio frequency spectrum band in a wireless network; receive a signal indicating that a value of the radio frequency spectrum band has met a threshold; and switch from the first mode to a second mode for wireless communication in the wireless network based on the signal indicating that the value has met the threshold, wherein a first length of a first SSB associated with the first mode is shorter than a second length of a second SSB associated with the second mode.

[0141] The transceiver 820 may communicate bidirectionally via one or more antennas, wired or wireless links, as described above. For example, the transceiver 820 may represent a wireless transceiver and may communicate bidirectionally with another wireless transceiver. The transceiver 820 may also include a modem to modulate packets and provide the modulated packets to an antenna for transmission, and demodulate packets received from an antenna.

[0142] In some cases, a wireless device may include a single antenna 825. However, in some cases, the device may have more than one antenna 825, which may be capable of transmitting or receiving multiple wireless transmissions concurrently.

[0143] The memory 830 may include random access memory (RAM), read-only memory (ROM), or a combination thereof. The memory 830 may store computer readable code 835 including instructions that, when executed by a processor (e.g., processor 840), cause the device to perform various functions described herein. In some cases, the memory 830 may include, among other things, a basic input / output system (BIOS), which may control basic hardware or software operations, such as interaction with peripheral components or devices.

[0144] The processor 840 may include an intelligent hardware device (e.g., a general purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof). In some cases, the processor 840 may be configured to operate a memory array using a memory controller. In other cases, the memory controller may be integrated into the processor 840. The processor 840 may be configured to execute computer-readable instructions stored in a memory (e.g., memory 830) to cause the device 805 to perform various functions (e.g., functions or tasks that support support for high path loss).

[0145] I / O controller 850 can manage input and output signals of device 805. I / O controller 850 can also manage peripheral devices that are not integrated into device 805. In some cases, I / O controller 850 can represent a physical connection or port to an external peripheral device. In some cases, I / O controller 850 can utilize an operating system, such as Or another known operating system. In other cases, I / O controller 850 may represent or interact with a modem, keyboard, mouse, touch screen, or similar device. In some cases, I / O controller 850 may be implemented as part of a processor. In some cases, a user may interact with device 805 via I / O controller 850 or via hardware components controlled by I / O controller 850.

[0146] The code 835 may include instructions for implementing various aspects of the present disclosure, including instructions for supporting wireless communications. The code 835 may be stored in a non-transitory computer-readable medium, such as a system memory or other type of memory. In some cases, the code 835 may not be directly executable by the processor 840, but may cause a computer (e.g., when compiled and executed) to perform the functions described herein.

[0147] Fig. 9 A diagram of a system 900 including a device 905 supporting use of a high path loss mode according to one or more aspects of the present disclosure is shown. The device 905 may be an example of or include components of a device 505, a wireless device, a device 605, or a base station 105 as described herein. The device 905 may include components for two-way voice and data communications, including components for transmitting and receiving communications, including a base station (BS) communication manager 910, a network communication manager 915, a transceiver 920, an antenna 925, a memory 930, a processor 940, and an inter-station communication manager 945. These components may be in electronic communication via one or more buses (e.g., a bus 955).

[0148] The communication manager 910 can operate in a first mode on a radio frequency spectrum band in a wireless network; receive a signal indicating that a value of the radio frequency spectrum band has met a threshold; and switch from the first mode to a second mode for wireless communication in the wireless network based on the signal indicating that the value has met the threshold, wherein a first length of a first SSB associated with the first mode is shorter than a second length of a second SSB associated with the second mode.

[0149] The network communications manager 915 may manage communications with the core network (eg, via one or more wired backhaul links). For example, the network communications manager 915 may manage the delivery of data communications for client devices, such as one or more UEs 115.

[0150] The transceiver 920 may communicate bidirectionally via one or more antennas, wired or wireless links, as described above. For example, the transceiver 920 may represent a wireless transceiver and may communicate bidirectionally with another wireless transceiver. The transceiver 920 may also include a modem to modulate packets and provide the modulated packets to an antenna for transmission, and demodulate packets received from an antenna.

[0151] In some cases, a wireless device may include a single antenna 925. However, in some cases, the device may have more than one antenna 925, which may be capable of transmitting or receiving multiple wireless transmissions concurrently.

[0152] The memory 930 may include RAM, ROM, or a combination thereof. The memory 930 may store computer readable code 935 including instructions that, when executed by a processor (e.g., processor 940), cause the device to perform various functions described herein. In some cases, the memory 930 may include, among other things, a BIOS that may control basic hardware or software operations, such as interaction with peripheral components or devices.

[0153] The processor 940 may include an intelligent hardware device (e.g., a general purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof). In some cases, the processor 940 may be configured to operate a memory array using a memory controller. In other cases, the memory controller may be integrated into the processor 940. The processor 940 may be configured to execute computer-readable instructions stored in a memory (e.g., memory 930) to cause the device 905 to perform various functions (e.g., functions or tasks that support support for high path loss).

[0154] The inter-site communication manager 945 may manage communications with other base stations 105 and may include a controller or scheduler for controlling communications with the UE 115 in cooperation with the other base stations 105. For example, the inter-site communication manager 945 may coordinate the scheduling of transmissions to the UE 115 for various interference mitigation techniques such as beamforming or joint transmission. In some examples, the inter-site communication manager 945 may provide an X2 interface within an LTE / LTE-A wireless communication network technology to provide communications between base stations 105.

[0155] The code 935 may include instructions for implementing various aspects of the present disclosure, including instructions for supporting wireless communications. The code 935 may be stored in a non-transitory computer-readable medium, such as a system memory or other type of memory. In some cases, the code 935 may not be directly executable by the processor 940, but may cause a computer (e.g., when compiled and executed) to perform the functions described herein.

[0156] Fig.10 A flow chart illustrating a method 1000 for supporting the use of a high path loss mode according to one or more aspects of the present disclosure is shown. The operations of the method 1000 may be implemented by a UE 115 or a base station 105 (e.g., a wireless device) or components thereof as described herein. For example, the operations of the method 1000 may be implemented by a UE 115 or a base station 105 (e.g., a wireless device) or components thereof as described herein. Figures 5 to 9 In some examples, the UE or base station may execute an instruction set to control the functional elements of the UE or base station to perform the functions described below. Additionally or alternatively, the UE or base station may use dedicated hardware to perform various aspects of the functions described below.

[0157] At 1005, a UE or a base station may operate in a first mode on a radio frequency spectrum band in a wireless network. The operations of 1005 may be performed according to the methods described herein. In some examples, aspects of the operations of 1005 may be performed as described in reference to Figures 5 to 9 The described path loss pattern manager is implemented.

[0158] At 1010, the UE or base station may receive a signal indicating that the value of the radio frequency spectrum band has satisfied a threshold. The operation of 1010 may be performed according to the methods described herein. In some examples, aspects of the operation of 1010 may be performed as described in reference to Figures 5 to 9 The described path loss value threshold manager is implemented.

[0159] At 1015, the UE or base station may switch from a first mode to a second mode for wireless communication in a wireless network based on the signal indicating that the value has satisfied a threshold, wherein a first length of a first SSB associated with the first mode is shorter than a second length of a second SSB associated with the second mode. The operations of 1015 may be performed according to the methods described herein. In some examples, aspects of the operations of 1015 may be performed as described in reference to Figures 5 to 9 The described path loss mode switching manager is performed.

[0160] Fig.11 A flow chart illustrating a method 1100 for supporting the use of a high path loss mode according to one or more aspects of the present disclosure is shown. The operations of the method 1100 may be implemented by a UE 115 or a base station 105 (e.g., a wireless device) or components thereof as described herein. For example, the operations of the method 1100 may be implemented by a UE 115 or a base station 105 (e.g., a wireless device) or components thereof as described herein. Figures 5 to 9 In some examples, the UE or base station may execute an instruction set to control the functional elements of the UE or base station to perform the functions described below. Additionally or alternatively, the UE or base station may use dedicated hardware to perform various aspects of the functions described below.

[0161] At 1105, the UE or base station may operate in a first mode on a radio frequency spectrum band in a wireless network. The operations of 1105 may be performed according to the methods described herein. In some examples, aspects of the operations of 1105 may be performed as described in reference to Figures 5 to 9 The described path loss pattern manager is implemented.

[0162] At 1110, the UE or base station may receive a signal indicating that the value of the radio frequency spectrum band has satisfied a threshold. The operation of 1110 may be performed according to the methods described herein. In some examples, aspects of the operation of 1110 may be performed as described in reference to Figures 5 to 9 The described path loss value threshold manager is implemented.

[0163] At 1115, the UE or base station may determine that the signal is received at a received power level below a threshold level, wherein the signal being received at a received power level below the threshold level indicates that the value has exceeded a threshold. The operations of 1115 may be performed according to the methods described herein. In some examples, aspects of the operations of 1115 may be performed as described in reference to Figures 5 to 9 The described autonomous path loss mode switching manager is implemented.

[0164] At 1120, the UE or base station may switch from the first mode to the second mode for wireless communication in the wireless network based on the signal indicating that the value has satisfied the threshold, wherein a first length of a first SSB associated with the first mode is shorter than a second length of a second SSB associated with the second mode. The operations of 1120 may be performed according to the methods described herein. In some examples, aspects of the operations of 1120 may be performed as described in reference to Figures 5 to 9 The described path loss mode switching manager is performed.

[0165] Fig.12 A flow chart illustrating a method 1200 for supporting the use of a high path loss mode according to one or more aspects of the present disclosure is shown. The operations of the method 1200 may be implemented by a UE 115 or a base station 105 (e.g., a wireless device) or components thereof as described herein. For example, the operations of the method 1200 may be implemented by a UE 115 or a base station 105 (e.g., a wireless device) or components thereof as described herein. Figures 5 to 9 In some examples, the UE or base station may execute an instruction set to control the functional elements of the UE or base station to perform the functions described below. Additionally or alternatively, the UE or base station may use dedicated hardware to perform various aspects of the functions described below.

[0166] At 1205, the UE or base station may operate in a first mode on a radio frequency spectrum band in a wireless network. The operations of 1205 may be performed according to the methods described herein. In some examples, aspects of the operations of 1205 may be performed as described in reference to Figures 5 to 9 The described path loss pattern manager is implemented.

[0167] At 1210, the UE or base station may receive a signal indicating that the value of the radio frequency spectrum band has satisfied a threshold. The operation of 1210 may be performed according to the methods described herein. In some examples, aspects of the operation of 1210 may be performed as described in reference to Figures 5 to 9 The described path loss value threshold manager is implemented.

[0168] At 1215, the UE or base station may decode the signal to determine that the value has exceeded the threshold. The operations of 1215 may be performed according to the methods described herein. In some examples, aspects of the operations of 1215 may be performed as described in reference to Figures 5 to 9 The described path loss pattern instructs the manager to execute.

[0169] At 1220, the UE or base station may switch from the first mode to the second mode for wireless communication in the wireless network based on the signal indicating that the value has satisfied the threshold, wherein a first length of a first SSB associated with the first mode is shorter than a second length of a second SSB associated with the second mode. The operations of 1220 may be performed according to the methods described herein. In some examples, aspects of the operations of 1220 may be performed as described in reference to Figures 5 to 9 The described path loss mode switching manager is performed.

[0170] It should be noted that the methods described herein describe possible implementations, and that the various operations and steps may be rearranged or otherwise modified and other implementations are possible. Furthermore, aspects from two or more methods may be combined.

[0171] Example 1: A method for wireless communication at a wireless device, comprising: operating in a first mode on a radio frequency spectrum band in a wireless network; receiving a signal indicating that a value of the radio frequency spectrum band has satisfied a threshold; and switching from the first mode to a second mode for wireless communication in the wireless network based at least in part on the signal indicating that the value has satisfied the threshold, wherein a first length of a first synchronization signal block associated with the first mode is shorter than a second length of a second synchronization signal block associated with the second mode.

[0172] Example 2: The method of Example 1, wherein the wireless network comprises an integrated access and backhaul (IAB) network.

[0173] Example 3: The method of Example 2 further comprises: performing wireless backhaul communication with a second wireless device of the IAB network according to the second mode.

[0174] Example 4: The method of Example 3 further includes: performing wireless backhaul communication with a third wireless device of the IAB network according to the first path loss pattern or the second path loss pattern.

[0175] Example 5: The method of any one of Examples 1 to 4, wherein the value comprises a path loss value and the threshold comprises a threshold path loss value.

[0176] Example 6: The method of Example 5 further includes: determining that the signal is received at a received power level below a threshold level, wherein the signal being received at a received power level below the threshold level indicates that the path loss value has exceeded a threshold path loss value.

[0177] Example 7: The method of any one of Examples 1 to 6, further comprising: transmitting an indication to one or more other wireless devices that the wireless device has switched to the second mode.

[0178] Example 8: The method of any one of Examples 1 to 7, further comprising: decoding the signal to determine that the value has exceeded a threshold.

[0179] Example 9: The method of any one of Examples 1 to 8, wherein the signal comprises at least one of an in-band signal, an out-of-band signal, a broadcast signal, a unicast signal, or a combination thereof.

[0180] Example 10 The method of any of Examples 1 to 9, wherein a first length of a first reference signal associated with the first pattern is shorter than a second length of a second reference signal associated with the second pattern.

[0181] Example 11: The method of any of Examples 1 to 10, wherein a first MCS associated with the first pattern is higher than a second MCS associated with the second path loss pattern.

[0182] Example 12: The method of any of Examples 1 to 11, wherein a first bandwidth associated with the first mode is wider than a second bandwidth associated with the second mode.

[0183] Example 13: The method of any of Examples 1 to 12, wherein a first beamwidth associated with the first mode is narrower than a second beamwidth associated with the second mode.

[0184] Example 14: A method as in any of Examples 1 to 13, wherein the radio frequency spectrum band comprises an unlicensed radio frequency spectrum band.

[0185] Example 15: The method of any one of Examples 1 to 13, wherein the wireless network comprises a millimeter wave wireless network.

[0186] Example 16: An apparatus comprising: at least one means for performing the method of any of Examples 1 to 15.

[0187] Example 17: An apparatus for wireless communication, comprising a processor; and a memory coupled to the processor, the processor and the memory configured to perform the method of any one of Examples 1 to 15.

[0188] Example 18: A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to perform the method of any of Examples 1 to 15.

[0189] The technology described herein can be used for various wireless communication systems, such as CDMA, TDMA, FDMA, OFDMA, single carrier frequency division multiple access (SC-FDMA), and other systems. CDMA systems can implement radio technologies such as CDMA2000, Universal Terrestrial Radio Access (UTRA). CDMA2000 covers IS-2000, IS-95 and IS-856 standards. IS-2000 versions are generally referred to as CDMA2000 1X, 1X, etc. IS-856 (TIA-856) is generally referred to as CDMA2000 1xEV-DO, High Rate Packet Data (HRPD), etc. UTRA includes Wideband CDMA (WCDMA) and other variants of CDMA. TDMA systems can implement radio technologies such as Global System for Mobile Communications (GSM).

[0190] OFDMA systems can implement radio technologies such as Ultra Mobile Broadband (UMB), E-UTRA, Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, etc. UTRA and E-UTRA are part of Universal Mobile Telecommunications System (UMTS). LTE, LTE-A, and LTE-A Pro are versions of UMTS that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, LTE-A Pro, NR, and GSM are described in documents from an organization named "3rd Generation Partnership Project" (3GPP). CDMA2000 and UMB are described in documents from an organization named "3rd Generation Partnership Project 2" (3GPP2). The techniques described herein can be used for the systems and radio technologies mentioned herein as well as for other systems and radio technologies. Although aspects of LTE, LTE-A, LTE-A Pro, or NR systems may be described for example purposes and LTE, LTE-A, LTE-A Pro, or NR terminology may be used in much of the description, the techniques described herein may also be applicable to applications other than LTE, LTE-A, LTE-A Pro, or NR applications.

[0191] A macro cell covers a relatively large geographic area (e.g., a radius of several kilometers) and may allow unrestricted access by UEs with service subscriptions to a network provider. A small cell may be associated with a lower power base station (compared to a macro cell), and the small cell may operate in the same or different (e.g., licensed, unlicensed, etc.) frequency band as the macro cell. According to various examples, a small cell may include a pico cell, a femto cell, and a micro cell. A pico cell, for example, may cover a smaller geographic area and may allow unrestricted access by UEs with service subscriptions to a network provider. A femto cell may also cover a smaller geographic area (e.g., a residence) and may provide restricted access by UEs associated with the femto cell (e.g., UEs in a closed subscriber group (CSG), UEs of users in the residence, etc.). An eNB for a macro cell may be referred to as a macro eNB. An eNB for a small cell may be referred to as a small cell eNB, a pico eNB, a femto eNB, or a home eNB. An eNB may support one or more (eg, two, three, four, etc.) cells and may also support communication using one or more component carriers.

[0192] The wireless communication systems described herein may support synchronous or asynchronous operation. For synchronous operation, each base station may have similar frame timing, and transmissions from different base stations may be roughly aligned in time. For asynchronous operation, each base station may have different frame timing, and transmissions from different base stations may not be aligned in time. The techniques described herein may be used for synchronous or asynchronous operation.

[0193] The information and signals described herein may be represented using any of a variety of different techniques and technologies. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referred to throughout this description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

[0194] The various illustrative blocks and modules described in conjunction with the disclosure herein may be implemented or executed with a general purpose processor, a DSP, an ASIC, an FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, but in an alternative, the processor may be any processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration).

[0195] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted by a computer-readable medium as one or more instructions or codes. Other examples and implementations fall within the scope of the present disclosure and the appended claims. For example, due to the nature of software, the functions described herein may be implemented using software executed by a processor, hardware, firmware, hardwiring, or any combination thereof. Features that implement the functions may also be physically located in various locations, including being distributed so that parts of the functions are implemented at different physical locations.

[0196] Computer-readable medium includes both non-transient computer storage medium and communication medium, and it includes any medium that facilitates computer program to transfer from one place to another.Non-transient storage medium can be any available medium that can be accessed by general or special-purpose computer.As an example and not limitation, non-transient computer-readable medium can include random access memory (RAM), read-only memory (ROM), electrically erasable programmable ROM (EEPROM), flash memory, compact disk (CD) ROM or other optical disk storage, disk storage or other magnetic storage device, or can be used to carry or store instruction or data structure form of desired program code means and can be accessed by general or special-purpose computer or general or special-purpose processor any other non-transient medium.Any connection is also properly referred to as computer-readable medium.For example, if software is transmitted from website, server or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL) or wireless technology such as infrared, radio and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL or wireless technology such as infrared, radio and microwave are just included in the definition of medium. Disk and disc as used herein include CDs, laser discs, optical discs, digital versatile discs (DVDs), floppy disks, and Blu-ray discs, 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.

[0197] As used herein (including in the claims), "or" used in a list of items (e.g., a list of items with a phrase such as "at least one of" or "one or more of") indicates an inclusive list, so that, for example, a list of at least one of A, B, or C means A or B or C or AB or AC or BC or ABC (i.e., A and B and C). Similarly, as used herein, the phrase "based on" should not be interpreted as referring to a closed set of conditions. For example, an exemplary feature described as "based on condition A" may be based on both condition A and condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase "based on" should be interpreted in the same manner as the phrase "based at least in part on."

[0198] In the accompanying drawings, similar components or features may have the same reference number. In addition, various components of the same type may be distinguished by following the reference number with a dash and a second reference number that distinguishes between similar components. If only the first reference number is used in the specification, the description may apply to any of the similar components having the same first reference number regardless of the second reference number, or other subsequent reference numbers.

[0199] The descriptions set forth herein in conjunction with the accompanying drawings describe example configurations and do not represent all examples that may be implemented or that fall within the scope of the claims. The term "exemplary" as used herein means "used as an example, instance, or illustration" and does not mean "better than" or "better than other examples." This detailed description includes specific details to provide an understanding of the described techniques. However, these techniques may 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.

[0200] The description herein is provided to enable those skilled in the art to make or use the present disclosure. Various modifications to the present disclosure will be apparent to those skilled in the art, and the universal principles defined herein may be applied to other variations without departing from the scope of the present disclosure. Thus, the present disclosure is not limited to the examples and designs described herein, but should be granted the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for wireless communication at a wireless device, comprising: Operating in a wireless network in a first path loss mode over a radio frequency spectrum band; receiving a signal indicating that the attenuation value of the radio frequency spectrum band has satisfied a threshold attenuation value; as well as Switching from the first path loss mode to a second path loss mode for wireless communication in the wireless network based at least in part on the signal indicating that the attenuation value has satisfied the threshold attenuation value, wherein a first length of a first synchronization signal block associated with the first path loss mode is shorter than a second length of a second synchronization signal block associated with the second path loss mode.

2. The method of claim 1, wherein the wireless network comprises an integrated access and backhaul (IAB) network.

3. The method of claim 2, further comprising: Wireless backhaul communications are performed with a second wireless device of the IAB network according to the second path loss pattern.

4. The method of claim 3, further comprising: Wireless backhaul communication is performed with a third wireless device of the IAB network according to the first path loss pattern or the second path loss pattern. The method of claim 1 , wherein the attenuation value comprises a measured power value.

6. The method of claim 1, further comprising: A determination is made that the signal is received at a received power level below a threshold level, wherein receipt of the signal at the received power level below the threshold level indicates that the attenuation value has exceeded the threshold attenuation value.

7. The method of claim 1, further comprising: An indication is transmitted to one or more other wireless devices that the wireless device has switched to the second path loss mode.

8. The method of claim 1, further comprising: The signal is decoded to determine that the attenuation value has satisfied the threshold attenuation value.

9. The method of claim 1, wherein the signal comprises at least one of an in-band signal, an out-of-band signal, a broadcast signal, a unicast signal, or a combination thereof.

10. The method of claim 1, wherein a first length of a first reference signal associated with the first path loss pattern is shorter than a second length of a second reference signal associated with the second path loss pattern.

11. The method of claim 1 , wherein a first modulation and coding scheme (MCS) associated with the first path loss pattern is higher than a second MCS associated with the second path loss pattern.

12. The method of claim 1, wherein a first bandwidth associated with the first path loss pattern is wider than a second bandwidth associated with the second path loss pattern.

13. The method of claim 1, wherein a first beamwidth associated with the first path loss pattern is narrower than a second beamwidth associated with the second path loss pattern.

14. The method of claim 1, wherein the radio frequency spectrum band comprises an unlicensed radio frequency spectrum band.

15. The method of claim 1, wherein the wireless network comprises a millimeter wave wireless network.

16. An apparatus for wireless communication at a wireless device, comprising: Means for operating in a first path loss mode over a radio frequency spectrum band in a wireless network; means for receiving a signal indicating that the attenuation value of the radio frequency spectrum band has satisfied a threshold attenuation value; as well as An apparatus for switching from the first path loss mode to a second path loss mode for wireless communication in the wireless network based at least in part on the signal indicating that the attenuation value has satisfied the threshold attenuation value, wherein a first length of a first synchronization signal block associated with the first path loss mode is shorter than a second length of a second synchronization signal block associated with the second path loss mode.

17. The apparatus of claim 16, wherein the wireless network comprises an integrated access and backhaul (IAB) network.

18. The apparatus of claim 17, further comprising: Means for performing wireless backhaul communications with a second wireless device of the IAB network according to the second path loss pattern.

19. The apparatus of claim 18, further comprising: Means for performing wireless backhaul communication with a third wireless device of the IAB network according to the first path loss pattern or the second path loss pattern.

20. The apparatus of claim 16, wherein the attenuation value comprises a measured power value.

21. The apparatus of claim 16, further comprising: means for determining that the signal is received at a received power level below a threshold level, wherein receipt of the signal at the received power level below the threshold level indicates that the attenuation value has exceeded the threshold attenuation value.

22. The apparatus of claim 16, further comprising: Means for transmitting an indication to one or more other wireless devices that the wireless device has switched to the second path loss mode.

23. The apparatus of claim 16, further comprising: Means for decoding the signal to determine that the attenuation value has satisfied the threshold attenuation value.

24. The apparatus of claim 16, wherein the signal comprises at least one of an in-band signal, an out-of-band signal, a broadcast signal, a unicast signal, or a combination thereof.

25. The apparatus of claim 16, wherein a first length of a first reference signal associated with the first path loss pattern is shorter than a second length of a second reference signal associated with the second path loss pattern.

26. The apparatus of claim 16, wherein a first modulation and coding scheme (MCS) associated with the first path loss pattern is higher than a second MCS associated with the second path loss pattern.

27. The apparatus of claim 16, wherein a first bandwidth associated with the first path loss pattern is wider than a second bandwidth associated with the second path loss pattern.

28. The apparatus of claim 16, wherein a first beamwidth associated with the first path loss pattern is narrower than a second beamwidth associated with the second path loss pattern.

29. An apparatus for wireless communication at a wireless device, comprising: one or more memories; as well as one or more processors coupled to the one or more memories and configured to cause the wireless device to: Operating in a wireless network in a first path loss mode over a radio frequency spectrum band; receiving a signal indicating that the attenuation value of the radio frequency spectrum band has satisfied a threshold attenuation value; as well as Switching from the first path loss mode to a second path loss mode for wireless communication in the wireless network based at least in part on the signal indicating that the attenuation value has satisfied the threshold attenuation value, wherein a first length of a first synchronization signal block associated with the first path loss mode is shorter than a second length of a second synchronization signal block associated with the second path loss mode.

30. The apparatus of claim 29, wherein the wireless network comprises an integrated access and backhaul (IAB) network.

31. The apparatus of claim 30, wherein the one or more processors are further configured to cause the wireless device to: Wireless backhaul communications are performed with a second wireless device of the IAB network according to the second path loss pattern.

32. The apparatus of claim 31 , wherein the one or more processors are further configured to cause the wireless device to: Wireless backhaul communication is performed with a third wireless device of the IAB network according to the first path loss pattern or the second path loss pattern.

33. The apparatus of claim 29, wherein the attenuation value comprises a measured power value.

34. The apparatus of claim 29, wherein the one or more processors are further configured to cause the wireless device to: A determination is made that the signal is received at a received power level below a threshold level, wherein receipt of the signal at the received power level below the threshold level indicates that the attenuation value has exceeded the threshold attenuation value.

35. The apparatus of claim 29, wherein the one or more processors are further configured to cause the wireless device to: An indication is transmitted to one or more other wireless devices that the wireless device has switched to the second path loss mode.

36. The apparatus of claim 29, wherein the one or more processors are further configured to cause the wireless device to: The signal is decoded to determine that the attenuation value has satisfied the threshold attenuation value.

37. The apparatus of claim 29, wherein the signal comprises at least one of an in-band signal, an out-of-band signal, a broadcast signal, a unicast signal, or a combination thereof.

38. The apparatus of claim 29, wherein a first length of a first reference signal associated with the first path loss pattern is shorter than a second length of a second reference signal associated with the second path loss pattern.

39. The apparatus of claim 29, wherein a first modulation and coding scheme (MCS) associated with the first path loss pattern is higher than a second MCS associated with the second path loss pattern.

40. The apparatus of claim 29, wherein a first bandwidth associated with the first path loss pattern is wider than a second bandwidth associated with the second path loss pattern.

41. The apparatus of claim 29, wherein a first beamwidth associated with the first path loss pattern is narrower than a second beamwidth associated with the second path loss pattern.

42. An apparatus as described in claim 29, wherein the radio frequency spectrum band includes an unlicensed radio frequency spectrum band.

43. The apparatus of claim 29, wherein the wireless network comprises a millimeter wave wireless network.

44. A non-transitory computer readable medium storing code for wireless communication at a wireless device, the code comprising instructions executable by a processor to: Operating in a wireless network in a first path loss mode over a radio frequency spectrum band; receiving a signal indicating that the attenuation value of the radio frequency spectrum band has satisfied a threshold attenuation value; as well as Switching from the first path loss mode to a second path loss mode for wireless communication in the wireless network based at least in part on the signal indicating that the attenuation value has satisfied the threshold attenuation value, wherein a first length of a first synchronization signal block associated with the first path loss mode is shorter than a second length of a second synchronization signal block associated with the second path loss mode.

45. The non-transitory computer readable medium of claim 44, wherein the wireless network comprises an integrated access and backhaul (IAB) network.

46. ​​The non-transitory computer readable medium of claim 45, wherein the instructions are further executable by the processor to: Wireless backhaul communications are performed with a second wireless device of the IAB network according to the second path loss pattern.

47. The non-transitory computer readable medium of claim 46, wherein the instructions are further executable by the processor to: Wireless backhaul communication is performed with a third wireless device of the IAB network according to the first path loss pattern or the second path loss pattern.

48. The non-transitory computer readable medium of claim 44, wherein the attenuation value comprises a measured power value.

49. An apparatus for wireless communication at a wireless device, comprising: one or more memories; as well as one or more processors coupled to the one or more memories and configured to cause the wireless device to: Operating in a wireless network in a first path loss mode over a radio frequency spectrum band; receiving a signal indicating that a switch is to be made from the first path loss mode to a second path loss mode, wherein the signal identifies a path loss value that satisfies a threshold path loss value, the threshold path loss value instructing the wireless device to switch from the first path loss mode to the second path loss mode; as well as and switching from the first path loss mode to the second path loss mode for wireless communication in the wireless network based at least in part on the signal, wherein a first bandwidth of a control channel associated with the first path loss mode is wider than a second bandwidth of the control channel associated with the second path loss mode.

50. The apparatus of claim 49, wherein the wireless network comprises an integrated access and backhaul (IAB) network.

51. The apparatus of claim 50, wherein the one or more processors are configured to cause the wireless device to: Wireless backhaul communications are performed with a second wireless device of the IAB network according to the second path loss pattern.

52. The apparatus of claim 51 , wherein the one or more processors are configured to cause the wireless device to: Wireless backhaul communication is performed with a third wireless device of the IAB network according to the first path loss pattern or the second path loss pattern.

53. The apparatus of claim 49, wherein the one or more processors are configured to cause the wireless device to: Determining that the signal is received at a received power level associated with the signal failing to satisfy the threshold path loss value, wherein receipt of the signal at the received power level associated with the signal failing to satisfy the threshold path loss value indicates a switch from the first path loss mode to the second path loss mode.

54. The apparatus of claim 49, wherein the one or more processors are configured to cause the wireless device to: An indication is transmitted to one or more other wireless devices that the wireless device has switched to the second path loss mode.

55. The apparatus of claim 49, wherein the signal comprises at least one of an in-band signal, an out-of-band signal, a broadcast signal, a unicast signal, or a combination thereof.

56. The apparatus of claim 49, wherein a first length of a first reference signal associated with the first path loss pattern is shorter than a second length of a second reference signal associated with the second path loss pattern.

57. The apparatus of claim 49, wherein a first modulation and coding scheme (MCS) associated with the first path loss pattern is higher than a second MCS associated with the second path loss pattern.

58. The apparatus of claim 49, wherein a first beamwidth associated with the first path loss pattern is narrower than a second beamwidth associated with the second path loss pattern.

59. An apparatus as described in claim 49, wherein the radio frequency spectrum band includes an unlicensed radio frequency spectrum band.

60. The apparatus of claim 49, wherein the wireless network comprises a millimeter wave wireless network.

61. An apparatus for wireless communication at a wireless device, comprising: one or more memories; as well as one or more processors coupled to the one or more memories and configured to cause the wireless device to: Operating in a wireless network in a first path loss mode over a radio frequency spectrum band; receiving a signal indicating that a switch is to be made from the first path loss mode to a second path loss mode, wherein the signal identifies a path loss value that satisfies a threshold path loss value, the threshold path loss value instructing the wireless device to switch from the first path loss mode to the second path loss mode; as well as Switching from the first path loss mode to the second path loss mode for wireless communication in the wireless network based at least in part on the signal, wherein a first length of a first synchronization signal block associated with the first path loss mode is shorter than a second length of a second synchronization signal block associated with the second path loss mode.

62. The apparatus of claim 61, wherein the wireless network comprises an integrated access and backhaul (IAB) network.

63. The apparatus of claim 62, wherein the one or more processors are configured to cause the wireless device to: Wireless backhaul communications are performed with a second wireless device of the IAB network according to the second path loss pattern.

64. The apparatus of claim 63, wherein the one or more processors are configured to cause the wireless device to: Wireless backhaul communication is performed with a third wireless device of the IAB network according to the first path loss pattern or the second path loss pattern.

65. The apparatus of claim 61 , wherein the one or more processors are configured to cause the wireless device to: Determining that the signal is received at a received power level associated with the signal failing to satisfy the threshold path loss value, wherein receipt of the signal at the received power level associated with the signal failing to satisfy the threshold path loss value indicates a switch from the first path loss mode to the second path loss mode.

66. The apparatus of claim 61 , wherein the one or more processors are configured to cause the wireless device to: An indication is transmitted to one or more other wireless devices that the wireless device has switched to the second path loss mode.

67. The apparatus of claim 61, wherein the signal comprises at least one of an in-band signal, an out-of-band signal, a broadcast signal, a unicast signal, or a combination thereof.

68. The apparatus of claim 61, wherein a first length of a first reference signal associated with the first path loss pattern is shorter than a second length of a second reference signal associated with the second path loss pattern.

69. The apparatus of claim 61, wherein a first modulation and coding scheme (MCS) associated with the first path loss pattern is higher than a second MCS associated with the second path loss pattern.

70. The apparatus of claim 61, wherein a first beamwidth associated with the first path loss pattern is narrower than a second beamwidth associated with the second path loss pattern.

71. An apparatus as described in claim 61, wherein the radio frequency spectrum band includes an unlicensed radio frequency spectrum band.

72. The apparatus of claim 61, wherein the wireless network comprises a millimeter wave wireless network.

73. A method for wireless communication at a wireless device, comprising: Operating in a wireless network in a first path loss mode over a radio frequency spectrum band; receiving a signal indicating that a switch is to be made from the first path loss mode to a second path loss mode, wherein the signal identifies a path loss value that satisfies a threshold path loss value, the threshold path loss value instructing the wireless device to switch from the first path loss mode to the second path loss mode; as well as and switching from the first path loss mode to the second path loss mode for wireless communication in the wireless network based at least in part on the signal, wherein a first bandwidth of a control channel associated with the first path loss mode is wider than a second bandwidth of the control channel associated with the second path loss mode.

74. The method of claim 73, wherein the wireless network comprises an integrated access and backhaul (IAB) network.

75. The method of claim 74, further comprising: Wireless backhaul communications are performed with a second wireless device of the IAB network according to the second path loss pattern.

76. The method of claim 75, further comprising: Wireless backhaul communication is performed with a third wireless device of the IAB network according to the first path loss pattern or the second path loss pattern.

77. The method of claim 73, further comprising: Determining that the signal is received at a received power level associated with the signal failing to satisfy the threshold path loss value, wherein receipt of the signal at the received power level associated with the signal failing to satisfy the threshold path loss value indicates a switch from the first path loss mode to the second path loss mode.

78. The method of claim 73, further comprising: An indication is transmitted to one or more other wireless devices that the wireless device has switched to the second path loss mode.

79. The method of claim 73, wherein the signal comprises at least one of an in-band signal, an out-of-band signal, a broadcast signal, a unicast signal, or a combination thereof.

80. The method of claim 73, wherein a first length of a first reference signal associated with the first path loss pattern is shorter than a second length of a second reference signal associated with the second path loss pattern.

81. The method of claim 73, wherein a first modulation and coding scheme (MCS) associated with the first path loss pattern is higher than a second MCS associated with the second path loss pattern.

82. The method of claim 73, wherein a first beamwidth associated with the first path loss pattern is narrower than a second beamwidth associated with the second path loss pattern.

83. A method as claimed in claim 73, wherein the radio frequency spectrum band includes an unlicensed radio frequency spectrum band.

84. The method of claim 73, wherein the wireless network comprises a millimeter wave wireless network.

85. A method for wireless communication at a wireless device, comprising: Operating in a wireless network in a first path loss mode over a radio frequency spectrum band; receiving a signal indicating that a switch is to be made from the first path loss mode to a second path loss mode, wherein the signal identifies a path loss value that satisfies a threshold path loss value, the threshold path loss value instructing the wireless device to switch from the first path loss mode to the second path loss mode; as well as Switching from the first path loss mode to the second path loss mode for wireless communication in the wireless network based at least in part on the signal, wherein a first length of a first synchronization signal block associated with the first path loss mode is shorter than a second length of a second synchronization signal block associated with the second path loss mode.

86. The method of claim 85, wherein the wireless network comprises an integrated access and backhaul (IAB) network.

87. The method of claim 86, further comprising: Wireless backhaul communications are performed with a second wireless device of the IAB network according to the second path loss pattern.

88. The method of claim 87, further comprising: Wireless backhaul communication is performed with a third wireless device of the IAB network according to the first path loss pattern or the second path loss pattern.

89. The method of claim 85, further comprising: Determining that the signal is received at a received power level associated with the signal failing to satisfy the threshold path loss value, wherein receipt of the signal at the received power level associated with the signal failing to satisfy the threshold path loss value indicates a switch from the first path loss mode to the second path loss mode.

90. The method of claim 85, further comprising: An indication is transmitted to one or more other wireless devices that the wireless device has switched to the second path loss mode.

91. The method of claim 85, wherein the signal comprises at least one of an in-band signal, an out-of-band signal, a broadcast signal, a unicast signal, or a combination thereof.

92. The method of claim 85, wherein a first length of a first reference signal associated with the first path loss pattern is shorter than a second length of a second reference signal associated with the second path loss pattern.

93. The method of claim 85, wherein a first modulation and coding scheme (MCS) associated with the first path loss pattern is higher than a second MCS associated with the second path loss pattern.

94. The method of claim 85, wherein a first beamwidth associated with the first path loss pattern is narrower than a second beamwidth associated with the second path loss pattern.

95. The method of claim 85, wherein the radio frequency spectrum band comprises an unlicensed radio frequency spectrum band.

96. The method of claim 85, wherein the wireless network comprises a millimeter wave wireless network.

97. A non-transitory computer-readable medium storing code for wireless communication at a wireless device, the code comprising instructions executable by one or more processors to cause the wireless device to: Operating in a wireless network in a first path loss mode over a radio frequency spectrum band; receiving a signal indicating that a switch is to be made from the first path loss mode to a second path loss mode, wherein the signal identifies a path loss value that satisfies a threshold path loss value, the threshold path loss value instructing the wireless device to switch from the first path loss mode to the second path loss mode; as well as and switching from the first path loss mode to the second path loss mode for wireless communication in the wireless network based at least in part on the signal, wherein a first bandwidth of a control channel associated with the first path loss mode is wider than a second bandwidth of the control channel associated with the second path loss mode.

98. A non-transitory computer readable medium storing code for wireless communication at a wireless device, the code comprising instructions executable by one or more processors to cause the wireless device to: Operating in a wireless network in a first path loss mode over a radio frequency spectrum band; receiving a signal indicating that a switch is to be made from the first path loss mode to a second path loss mode, wherein the signal identifies a path loss value that satisfies a threshold path loss value, the threshold path loss value instructing the wireless device to switch from the first path loss mode to the second path loss mode; as well as Switching from the first path loss mode to the second path loss mode for wireless communication in the wireless network based at least in part on the signal, wherein a first length of a first synchronization signal block associated with the first path loss mode is shorter than a second length of a second synchronization signal block associated with the second path loss mode.

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