Patent Publication Number: US-11657740-B1

Title: Displaying directional visual indicators from a wearable device for navigation

Description:
TECHNICAL FIELD 
     This disclosure generally relates to the field of wireless communication, and more particularly, to displaying directional visual indicators from a wearable device for navigation. 
     DESCRIPTION OF THE RELATED TECHNOLOGY 
     Wireless communications systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, navigation, and so on. These systems may be capable of supporting communication with multiple users by sharing the available system resources (such as time, frequency, and power). The wireless communication systems may include cellular communication systems that may include a number of base stations (BSs), each simultaneously supporting communications for multiple communication devices, which may be otherwise known as user equipment (UE). The wireless communication systems also may include wireless local area networks (WLANs) that may be formed by two or more WLAN devices, which may include at least one station (STA) and at least one access point (AP). The wireless communication systems also may include satellite-based communication systems that may include one or more satellites and one or more wireless devices with navigation capabilities. The satellite-based communication systems may include global positioning system (GPS), global navigation satellite system (GLONASS), satellite-based augmentation system (SBAS), or a combination of satellite-based communication systems, such as a combination of GPS and GLONASS. 
     Wireless communication systems may be used by wireless devices (such as mobile phones and wearable devices) for positioning and navigation. The wireless devices typically receive a set of signals (such as navigation signals from satellites in the case of satellite-based communication systems, radio signals from BSs in the case of cellular communication systems, and radio signals from APs in the case of WLANs), analyze the received set of signals, and display navigation information to users. 
     SUMMARY 
     The systems, methods, and devices of this disclosure each have several innovative aspects, no single one of which is solely responsible for the desirable attributes disclosed herein. 
     One innovative aspect of the subject matter described in this disclosure can be implemented by a method for displaying directional visual indicators for navigation performed by a wearable device. The method may include receiving navigation signals while the wearable device is in a navigation mode. The navigation signals may indicate a direction of travel. The method may include displaying a first directional visual indicator corresponding to the direction of travel. The first directional visual indicator may be displayed external to the wearable device. 
     In some implementations, the first directional visual indicator displayed external to the wearable device may be a directional light or a directional projection displayed external to the wearable device in the direction of travel. 
     In some implementations, the directional projection may be a projection of a map associated with the navigation in the direction of travel, a projection of an arrow pointing in the direction of travel, or a projection of a text message indicating the direction of travel. 
     In some implementations, the directional light may be a static light, a moving light in the direction of travel, a sliding light, a flashing light, or a glowing light. 
     In some implementations, the method may further include, if the direction of travel may be changing from a first direction to a second direction, displaying a second directional visual indicator external to the wearable device and turning off the first directional visual indicator. 
     In some implementations, the method may further include, if the direction of travel may be changing from a first direction to a second direction, displaying a second directional visual indicator external to the wearable device from a first side section of the wearable device in the second direction and turning off the first directional visual indicator, and if the direction of travel may be changing from the first direction to a third direction, displaying a third directional visual indicator external to the wearable device from a second side section of the wearable device in the third direction and turning off the first directional visual indicator. 
     Another innovative aspect of the subject matter described in this disclosure can be implemented in a wearable device configured to display directional visual indicators for navigation. The wearable device may include one or more interfaces and one or more display modules. The one or more interfaces may be configured to receive navigation signals while the wearable device is in a navigation mode. The navigation signals may indicate a direction of travel. The one or more display modules may be configured to display a first directional visual indicator corresponding to the direction of travel. The first directional visual indicator may be displayed external to the wearable device. 
     In some implementations, if the direction of travel may be changing from a first direction to a second direction, the one or more display modules may be configured to display a second directional visual indicator external to the wearable device and turn off the first directional visual indicator. 
     In some implementations, the wearable device may further include one or more sensors configured to detect an emergency condition. The one or more display modules may be configured to display two or more directional visual indicators external to the wearable device from two or more sections of the wearable device in two or more directions in response to a detection of the emergency condition. 
     Another innovative aspect of the subject matter described in this disclosure can be implemented in an apparatus configured to display directional visual indicators for navigation. The apparatus may include means for receiving navigation signals while the apparatus is in a navigation mode. The navigation signals may indicate a direction of travel. The apparatus may include means for displaying a first directional visual indicator corresponding to the direction of travel. The first directional visual indicator may be displayed external to the apparatus 
     Another innovative aspect of the subject matter described in this disclosure can be implemented in a non-transitory computer-readable medium having stored therein instructions which, when executed by a processor of a wearable device, may cause the wearable device to receive navigation signals while the wearable device is in a navigation mode. The navigation signals may indicate a direction of travel. The instructions, when executed by the processor of the wearable device, may cause the wearable device to display a first directional visual indicator corresponding to the direction of travel. The first directional visual indicator may be displayed external to the wearable device. 
     Aspects of the subject matter described in this disclosure can be implemented in a device, a software program, a system, or other means to perform any of the above-mentioned methods. 
     Details of one or more implementations of the subject matter described in this disclosure are set forth in the accompanying drawings and the description below. Other features, aspects, and advantages will become apparent from the description, the drawings, and the claims. Note that the relative dimensions of the following figures may not be drawn to scale. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG.  1    shows a system diagram of an example wireless communication network. 
         FIG.  2    shows a system diagram of an example wearable device configured to display directional visual indicators for navigation via a wireless communication network. 
         FIG.  3    shows a conceptual diagram of an example wearable device configured to display directional visual indicators to indicate a change in the direction of travel during navigation. 
         FIG.  4    shows a conceptual diagram of another example wearable device configured to display directional visual indicators to indicate a change in the direction of travel during navigation. 
         FIG.  5    shows a conceptual diagram of another example wearable device configured to display directional visual indicators to indicate a change in the direction of travel during navigation. 
         FIG.  6    shows a conceptual diagram of another example wearable device configured to display additional directional visual indicators. 
         FIG.  7    shows a conceptual diagram of another example wearable device configured to display directional visual indicators to indicate an emergency situation. 
         FIG.  8    depicts a flowchart with example operations performed by a wearable device to display directional visual indicators for navigation. 
         FIG.  9    shows a conceptual diagram of another example wearable device configured to display directional visual indicators to indicate an emergency situation. 
         FIG.  10    depicts a flowchart with example operations performed by a wearable device to display directional visual indicators for navigation. 
         FIG.  11    shows a block diagram of an example wireless communication device. 
         FIG.  12    shows a block diagram of an example wearable device. 
     
    
    
     Like reference numbers and designations in the various drawings indicate like elements. 
     DETAILED DESCRIPTION 
     The following description is directed to certain implementations for the purposes of describing the innovative aspects of this disclosure. However, a person having ordinary skill in the art will readily recognize that the teachings herein can be applied in a multitude of different ways. The examples in this disclosure are based on wireless network communications in wide area networks (WANs). However, the described implementations may be implemented in any device, system or network that is capable of transmitting and receiving radio frequency signals according to any of the wireless communication standards, including any of the Institute of Electrical and Electronics Engineers (IEEE) 802.11 standards, the Bluetooth® standard, code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal FDMA (OFDMA), single-carrier FDMA (SC-FDMA), Global System for Mobile communications (GSM), GSM/General Packet Radio Service (GPRS), Enhanced Data GSM Environment (EDGE), Terrestrial Trunked Radio (TETRA), Wideband-CDMA (W-CDMA), Evolution Data Optimized (EV-DO), 1×EV-DO, EV-DO Rev A, EV-DO Rev B, High Speed Packet Access (HSPA), High Speed Downlink Packet Access (HSDPA), High Speed Uplink Packet Access (HSUPA), Evolved High Speed Packet Access (HSPA+), Long Term Evolution (LTE), 5 th  Generation (5G) or new radio (NR), Advanced Mobile Phone Service (AMPS), global positioning system (GPS), global navigation satellite system (GLONASS), satellite-based augmentation system (SBAS), or other known signals that are used to communicate within a wireless, cellular or internet of things (IoT) network, such as a system utilizing 3G, 4G or 5G, or further implementations thereof, technology. 
     Users may use various types of electronic devices for navigation, such as mobile phones, wearable devices, and vehicle navigation systems. When a user uses a wearable device for navigation, the user may experience issues that result in a poor user experience. For example, since the display of a wearable device is typically small, a driver of an automobile may have a difficult time reading the navigation information on the display of the wearable device. Attempting to discern the navigation information while driving may be a hazard for a user of the wearable device, and may result in an accident. Also, if the driver cannot read the navigation information in the display of the wearable device, the driver may stop the vehicle to zoom in or to closely examine the displayed navigation information. This may waste valuable time and may delay the driver in reaching the destination. 
     In some implementations, a wearable device may display a directional visual indicator external to the wearable device during navigation. The directional visual indicator may correspond to the direction of travel during the navigation. For example, the wearable device may display a first directional visual indicator external to the wearable device that indicates a first direction of travel. When the direction of travel is about to change from a first direction (such as a North direction) to a second direction (such as a West direction), the wearable device may display a second directional visual indicator external to the wearable device that corresponds to a second direction of travel and turn off the first directional visual indicator. 
     In some implementations, the directional visual indicator may be a directional light or a directional projection displayed external to the wearable device in the direction of travel. For example, the directional projection may be a projection of a map for the navigation in the direction of travel, a projection of an arrow pointing in the direction of travel, a projection of a text message indicating the direction of travel, among other such types of projections. The directional light may be a static light, a moving light in the direction of travel, a sliding light, a flashing light, a blinking light, or a glowing light, etc. In some implementations, the wearable device may include two or more projectors that are used to display the directional projections external to the wearable device. In some implementations, the wearable device may include two or more light-emitting diode (LED) lights that are used to display the directional lights external to the wearable device. 
     In some implementations, when the direction of travel is about to change from a first direction (such as a North direction) to a second direction (such as a West direction), the wearable device may increase a light intensity of the displayed directional visual indicator (such as a directional light or a directional projection) as the wearable device gets closer to the change in the direction of travel. For example, when the wearable device is at a first distance from the location where the change in the direction of travel will occur, the wearable device may display the directional visual indicator using a first light intensity level. When the wearable device is at a second distance (which is closer than the first distance) from the change in the direction of travel, the wearable device may display the directional visual indicator using a second light intensity level that is higher than the first light intensity level. In some implementations, the wearable device may increase a blink or flash rate of the displayed directional visual indicator (such as a directional light or a directional projection) as the wearable device gets closer to the change in the direction of travel. In some implementations, the wearable device may increase both a light intensity and a blink or flash rate of the displayed directional visual indicator as the wearable device gets closer to the location where the change in the direction of travel will occur. 
     In some implementations, when the available power of the wearable device falls below a power level or the wearable device enters a power save mode, the wearable device may turn off the display and the projectors of the wearable device in order to save power. When the display and the projectors are turned off, the wearable device may use the LED lights to display the directional lights as the directional visual indicators, since the LED lights use less power compared to the display and the projectors. 
     In some implementations, two or more of the directional visual indicators may be displayed during emergency situations. For example, one or more of the sensors of the wearable device (such as one or more of an accelerometer, a gyroscope, a magnetometer, a heart rate monitor, etc.) may detect an emergency situation, such as a car crash involving the user of the wearable device or a sudden fall by the user of the wearable device. After detecting the emergency situation, the wearable device may display two or more directional visual indicators external to the wearable device having a red or orange color that may be visible at a distance. Also, the two or more directional visual indicators may begin to blink, flash, or glow after detecting the emergency situation. 
     Particular implementations of the subject matter described in this disclosure can be implemented to realize one or more of the following potential advantages. Implementing directional visual indicators that are displayed external to the main display of the wearable device during navigation may extend the display area for navigation information. Displaying directional visual indicators external to the wearable device may allow users to easily view the navigation information based on the extended display area and thus may improve navigation using the wearable device. Displaying directional visual indicators that correspond to the direction of travel may allow users to easily ascertain, observe or determine any changes in the direction of travel. Displaying directional visual indicators during an emergency situation may alert other people of a potential emergency situation from a distance, which may result in the user receiving assistance. Thus, implementing directional visual indicators that are displayed external to the wearable device in the direction of travel may improve navigation using wearable devices, which may improve the overall user experience during navigation. Also, implementing directional visual indicators during emergency situations may help to quickly resolve the emergency situations. 
       FIG.  1    is a system diagram of an example wireless communication network  100 . The wireless communication network  100  may be an LTE network or a 5G NR network, or a combination thereof. The wireless communication network  100  also may be referred to as a wide area network (WAN) or a wireless wide area network (WWAN). The wireless communication network  100  also may include one or more wireless local area networks (WLANs) and one or more satellite-based communication systems. The wireless communication network  100  includes a number of base stations (BSs)  110  (individually labeled as  110 A,  110 B,  110 C,  110 D,  110 E, and  110 F) and other network entities. ABS  110  may be a station that communicates with UEs  120  and also may be referred to as an evolved node B (eNB), a next generation eNB (gNB), an access point, and the like. In some implementations, a BS  110  may represent an eNB of an LTE network or a gNB of a 5G NR network, or a combination thereof. Each BS  110  may provide communication coverage for a particular geographic area. In 3GPP, the term “cell” can refer to this particular geographic coverage area of a BS  110  or a BS subsystem serving the coverage area, depending on the context in which the term is used. 
     A BS  110  may provide communication coverage for a macro cell or a small cell, such as a pico cell or a femto cell, or other types of cells. A macro cell generally covers a relatively large geographic area (such as several kilometers in radius) and may allow unrestricted access by UEs with service subscriptions with the network provider. A pico cell generally covers a relatively smaller geographic area and may allow unrestricted access by UEs with service subscriptions with the network provider. A femto cell generally covers a relatively small geographic area (such as a home) and, in addition to unrestricted access, also may provide restricted access by UEs having an association with the femto cell (such as UEs in a closed subscriber group (CSG), UEs for users in the home, and the like). A BS for a macro cell may be referred to as a macro BS. A BS for a small cell may be referred to as a small cell BS, a pico BS, a femto BS or a home BS. In the example shown in  FIG.  1   , the BSs  110 D and  110 E may be regular macro BSs, while the BSs  110 A- 110 C may be macro BSs enabled with three dimensions (3D), full dimensions (FD), or massive MIMO. The BSs  110 A- 110 C may take advantage of their higher dimension MIMO capabilities to exploit 3D beamforming in both elevation and azimuth beamforming to increase coverage and capacity. The BS  110 F may be a small cell BS which may be a home node or portable access point. A BS  110  may support one or multiple (such as two, three, four, and the like) cells. 
     The wireless communication network  100  may support synchronous or asynchronous operation. For synchronous operation, the BSs may have similar frame timing, and transmissions from different BSs may be approximately aligned in time. For asynchronous operation, the BSs may have different frame timing, and transmissions from different BSs may not be aligned in time. 
     The UEs  120  are dispersed throughout the wireless communication network  100 , and each UE  120  may be stationary or mobile. A UE  120  also may be referred to as a terminal, a mobile station, a wireless device, a subscriber unit, a station, or the like. A UE  120  may be a mobile phone, a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a wearable device, a tablet computer, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a smart appliance, a drone, a video camera, a sensor, or the like. In one aspect, a UE  120  may be a device that includes a Universal Integrated Circuit Card (UICC). In another aspect, a UE may be a device that does not include a UICC. In some aspects, the UEs  120  that do not include UICCs also may be referred to as IoT devices or internet of everything (IoE) devices. The UEs  120 A- 120 D are examples of mobile smart phone-type devices that may access the wireless communication network  100 . A UE  120  also may be a machine specifically configured for connected communication, including machine type communication (MTC), enhanced MTC (eMTC), narrowband IoT (NB-IoT), and the like. The UEs  120 E- 120 L are examples of various machines configured for communication that access the wireless communication network  100 . A UE  120  may be able to communicate with any type of the BSs, whether macro BS, small cell, or the like. In  FIG.  1   , a lightning bolt is representative of a communication link that indicates wireless transmissions between a UE  120  and a serving BS  110 , which is a BS designated to serve the UE  120  on the downlink and uplink, or desired transmission between BSs, and backhaul transmissions between BSs. 
     In operation, the BSs  110 A- 110 C may serve the UEs  120 A and  120 B using 3D beamforming and coordinated spatial techniques, such as coordinated multipoint (CoMP) or multi-connectivity. The macro BS  110 D may perform backhaul communications with the BSs  110 A- 110 C, as well as the BS  110 F (which may be a small cell BS). The macro BS  110 D also may transmit multicast services which are subscribed to and received by the UEs  120 C and  120 D. Such multicast services may include mobile television or stream video, or may include other services for providing community information, such as weather emergencies or alerts, such as Amber alerts or gray alerts. 
     The BSs  110  also may communicate with a core network. The core network may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. At least some of the BSs  110  (such as a gNB or an access node controller (ANC)) may interface with the core network through backhaul links (such as NG-C and NG-U) and may perform radio configuration and scheduling for communication with the UEs  120 . In various examples, the BSs  110  may communicate, either directly or indirectly (such as through core network), with each other over backhaul links, which may be wired or wireless communication links. 
     The wireless communication network  100  also may support mission critical communications with ultra-reliable and redundant links for mission critical devices, such as the UE  120 E, which may be a drone. Redundant communication links with the UE  120 E may include links from the macro BSs  110 D and  110 E, as well as links from the small cell BS  110 F. Other machine type devices, such as the UE  120 F and UE  120 G (such as video cameras or smart lighting), the UE  120 H (such as a smart meter), and UE  120 I (such as a wearable device) may communicate through the wireless communication network  100  either directly with the BSs, such as the small cell BS  110 F, and the macro BS  110 E, or in multi-hop configurations by communicating with another user device which relays its information to the wireless communication network  100 . For example, the UE  120 H may communicate smart meter information to the UE  120 I (such as a wearable device or mobile phone), which may report to the wireless communication network  100  through the small cell BS  110 F. The wireless communication network  100  also may provide additional network efficiency through dynamic, low-latency TDD/FDD communications, such as in vehicle-to-vehicle (V2V) communications, as shown by UEs  120 J- 120 L. Furthermore, the wireless communication network  100  may include one or more access points (APs)  107  that are part of one or more wireless local area networks (WLANs). The APs  107  (which also may be referred to as WLAN APs) may provide short-range wireless connectivity to the UEs  120  of the wireless communication network  100 . The wireless communication network  100  also may include one or more satellites  130  that are part of one or more satellite-based communication systems, such as one or more of a global positioning system (GPS), a global navigation satellite system (GLONASS), and a satellite-based augmentation system (SBAS). The satellites may provide long-range wireless connectivity to the UEs  120  of the wireless communication network. 
     In some implementations, the wireless communication network  100  may utilize OFDM-based waveforms for communications. An OFDM-based system may partition the system BW into multiple (K) orthogonal subcarriers, which are also commonly referred to as subcarriers, tones, bins, or the like. Each subcarrier may be modulated with data. In some instances, the subcarrier spacing between adjacent subcarriers may be fixed, and the total number of subcarriers (K) may be dependent on the system BW. The system BW also may be partitioned into subbands. In other instances, the subcarrier spacing and/or the duration of TTIs may be scalable. 
     The BSs  110  may assign or schedule transmission resources (such as in the form of time-frequency resource blocks (RB)) for downlink (DL) and uplink (UL) transmissions in the wireless communication network  100 . DL refers to the transmission direction from a BS  110  to a UE  120 , whereas UL refers to the transmission direction from a UE  120  to a BS  110 . The communication can be in the form of radio frames. A radio frame may be divided into a plurality of subframes or slots. Each slot may be further divided into mini-slots. In a FDD mode, simultaneous UL and DL transmissions may occur in different frequency bands. For example, each subframe includes a UL subframe in a UL frequency band and a DL subframe in a DL frequency band. In a TDD mode, UL and DL transmissions occur at different time periods using the same frequency band. For example, a subset of the subframes (such as the DL subframes) in a radio frame may be used for DL transmissions, and another subset of the subframes (such as the UL subframes) in the radio frame may be used for UL transmissions. 
     The DL subframes and the UL subframes can be further divided into several regions. For example, each DL or UL subframe may have pre-defined regions for transmissions of reference signals, control information, and data. Reference signals are predetermined signals that facilitate the communications between the BSs  110  and the UEs  120 . For example, a reference signal can have a particular pilot pattern or structure, where pilot tones may span across an operational BW or frequency band, each positioned at a pre-defined time and a pre-defined frequency. For example, a BS  110  may transmit cell-specific reference signals (CRSs) or channel state information reference signals (CSI-RSs) to enable a UE  120  to estimate a DL channel. Similarly, a UE  120  may transmit sounding reference signals (SRSs) to enable a BS  110  to estimate a UL channel. Control information may include resource assignments and protocol controls. Data may include protocol data and operational data. In some aspects, the BSs  110  and the UEs  120  may communicate using self-contained subframes. A self-contained subframe may include a portion for DL communication and a portion for UL communication. A self-contained subframe can be DL-centric or UL-centric. A DL-centric subframe may include a longer duration for DL communication than for UL communication. A UL-centric subframe may include a longer duration for UL communication than for UL communication. 
     In some aspects, the wireless communication network  100  may be an NR network deployed over a licensed spectrum or an NR network deployed over an unlicensed spectrum (such as NR-U and NR-U lite networks). The BSs  110  can transmit synchronization signals, including a primary synchronization signal (PSS) and a secondary synchronization signal (SSS), in the wireless communication network  100  to facilitate synchronization. The BSs  110  can broadcast system information associated with the wireless communication network  100  (such as a master information block (MIB), remaining system information (RMSI), and other system information (OSI)) to facilitate initial network access. In some instances, the BSs  110  may broadcast one or more of the PSS, the SSS, and the MIB in the form of synchronization signal block (SSBs) over a physical broadcast channel (PBCH) and may broadcast one or more of the RMSI and the OSI over a physical downlink shared channel (PDSCH). 
     In some aspects, a UE  120  attempting to access the wireless communication network  100  may perform an initial cell search by detecting a PSS included in an SSB from a BS  110 . The PSS may enable synchronization of period timing and may indicate a physical layer identity value. The UE  120  may receive an SSS included in an SSB from the BS  110 . The SSS may enable radio frame synchronization, and may provide a cell identity value, which may be combined with the physical layer identity value to identify the cell. The PSS and the SSS may be located in a central portion of a carrier or any suitable frequencies within the carrier. 
     After receiving the PSS and SSS, the UE  120  may receive an MIB. The MIB may include system information for initial network access and scheduling information for at least one of an RMSI and OSI. After decoding the MIB, the UE  120  may receive at least one of an RMSI and OSI. The RMSI and OSI may include radio resource control (RRC) information related to random access channel (RACH) procedures, paging, control resource set (CORESET) for physical downlink control channel (PDCCH) monitoring, physical uplink control channel (PUCCH), physical uplink shared channel (PUSCH), power control, and SRS. 
     After obtaining one or more of the MIB, the RMSI and the OSI, the UE  120  can perform a random access procedure to establish a connection with the BS  110 . In some examples, the random access procedure may be a four-step random access procedure. For example, the UE  120  may transmit a physical random access channel (PRACH), such as a PRACH preamble, and the BS  110  may respond with a random access response (RAR). The RAR may include one or more of a detected random access preamble identifier (ID) corresponding to the PRACH preamble, timing advance (TA) information, a UL grant, a temporary cell-radio network temporary identifier (C-RNTI), and a backoff indicator. Upon receiving the RAR, the UE  120  may transmit a connection request to the BS  110  and the BS  110  may respond with a connection response. The connection response may indicate a contention resolution. In some examples, the PRACH, the RAR, the connection request, and the connection response can be referred to as message 1 (MSG1), message 2 (MSG2), message 3 (MSG3), and message 4 (MSG4), respectively. In some examples, the random access procedure may be a two-step random access procedure, where the UE  120  may transmit a PRACH (including a PRACH preamble) and a connection request in a single transmission and the BS  110  may respond by transmitting a RAR and a connection response in a single transmission. 
     After establishing a connection, the UE  120  and the BS  110  can enter a normal operation stage, where operational data may be exchanged. For example, the BS  110  may schedule the UE  120  for UL and DL communications. The BS  110  may transmit UL and DL scheduling grants to the UE  120  via a PDCCH. The BS  110  may transmit a DL communication signal to the UE  120  via a PDSCH according to a DL scheduling grant. The UE  120  may transmit a UL communication signal to the BS  110  via a PUSCH or PUCCH according to a UL scheduling grant. 
     In some aspects, the wireless communication network  100  may operate over a system BW or a component carrier BW. The wireless communication network  100  may partition the system BW into multiple bandwidth parts (BWPs). A BWP may be a certain portion of the system BW. For example, if the system BW is 100 MHz, the BWPs may each be 20 MHz or less. ABS  110  may dynamically assign a UE  120  to operate over a certain BWP. The assigned BWP may be referred to as the active BWP. The UE  120  may monitor the active BWP for signaling information from the BS  110 . The BS  110  may schedule the UE  120  for UL or DL communications in the active BWP. In some implementations, the BS  110  may configure UEs  120  with narrowband operation capabilities (such as with transmission and reception limited to a BW of 20 MHz or less) to perform BWP hopping for channel monitoring and communications. 
     In some aspects, a BS  110  may assign a pair of BWPs within the component carrier to a UE  120  for UL and DL communications. For example, the BWP pair may include one BWP for UL communications and one BWP for DL communications. The BS  110  may additionally configure the UE  120  with one or more CORESETs in a BWP. A CORESET may include a set of frequency resources spanning a number of symbols in time. The BS  110  may configure the UE  120  with one or more search spaces for PDCCH monitoring based on the CORESETS. The UE  120  may perform blind decoding in the search spaces to search for DL control information (such as UL or DL scheduling grants) from the BS  110 . For example, the BS  110  may configure the UE  120  with one or more of the BWPs, the CORESETS, and the PDCCH search spaces via RRC configurations. 
     In some aspects, the wireless communication network  100  may operate over a shared frequency band or an unlicensed frequency band, for example, at about 3.5 gigahertz (GHz), sub-6 GHz or higher frequencies in the mmWave band. The wireless communication network  100  may partition a frequency band into multiple channels, for example, each occupying about 20 MHz. The BSs  110  and the UEs  120  may be operated by multiple network operating entities sharing resources in the shared communication medium and may employ a LBT procedure to acquire channel occupancy time (COT) in the share medium for communications. A COT may be non-continuous in time and may refer to an amount of time a wireless node can send frames when it has won contention for the wireless medium. Each COT may include a plurality of transmission slots. A COT also may be referred to as a transmission opportunity (TXOP). The BS  110  or the UE  120  may perform an LBT in the frequency band prior to transmitting in the frequency band. The LBT can be based on energy detection or signal detection. For energy detection, the BS  110  or the UE  120  may determine that the channel is busy or occupied when a signal energy measured from the channel is greater than a certain signal energy threshold. For signal detection, the BS  110  or the UE  120  may determine that the channel is busy or occupied when a certain reservation signal (such as a preamble signal sequence) is detected in the channel. 
       FIG.  2    shows a system diagram of an example wearable device configured to display directional visual indicators for navigation via a wireless communication network  200 . The wireless communication network  200  shown in  FIG.  2    may be an example of the wireless communication network  100  described in  FIG.  1   . The wireless communication network  200  may include a wearable device  220  and a satellite  130 . Although not shown for simplicity, the wireless communication network  200  may include one or more additional satellites. The wearable device  220  may be one of various types of wearable devices, such as smart watches, fitness trackers, smart jewelry, implantable devices, augmented, virtual or extended reality glasses (AR/VR/XR headwear), etc. A user of the wearable device  220  may use the directional visual indicators for navigation in various activities, such as driving, trekking, military operations, mountain biking, fitness tasks, and emergency situations. 
     In some implementations, the wearable device  220  may include a navigation unit  212  and one or more display modules  214 . The navigation unit  212  may receive and process navigation signals when the wearable device  220  is operating in a navigation mode. During the navigation mode, the navigation unit  212  may process the navigation signals to determine a position and a direction of travel of the wearable device  220 . The navigation unit  212  may include navigation software that may work in conjunction with the one or more display modules to display a map showing the position and direction of travel of the wearable device  220  in a main display (such as a display  221 ) of the wearable device  220 , as further described herein. The one or more display modules  214  may include one or more projectors and one or more LED lights that may be used to display directional visual indicators external to the wearable device  220  for navigation, as further described herein. 
     In some implementations, the satellite  130  may transmit navigation signals to the wearable device  220 . For example, the satellite  130  may transmit navigation signals to the wearable device  220  when the wearable device  220  is in a navigation mode. In some implementations, the navigation signals may indicate a position and a direction of travel of the wearable device  220 . For example, each navigation signal may indicate a GPS coordinate for the position of the wearable device  220 , and two or more of the navigation signals may indicate the direction of travel. In some implementations, while the wearable device  220  is in the navigation mode, the wearable device  220  may continuously receive navigation signals that update the position and direction of travel of the wearable device  220  during navigation. During the navigation mode, the display  221  of the wearable device  220  may display the position, direction of travel, and other navigation and routing information within a map that is generated by a navigation software based on the received navigation signals. 
     In some implementations, the wearable device  220  may display a directional visual indicator corresponding to the direction of travel during navigation. The wearable device  220  may display the directional visual indicator external to the wearable device  220 . For example, the wearable device  220  may display one of the directional visual indicators  250 A-D that corresponds to the direction of travel. The directional visual indicators  250 A-D collectively may be referred to as directional visual indicators  250  or individually may be referred to as a directional visual indicator  250 . For example, the wearable device  220  may display a first directional visual indicator  250  (such as the directional visual indicator  250 C) external to the wearable device  220  indicating a first direction of travel. When the direction of travel is about to change from a first direction (such as a North direction) to a second direction (such as an East direction), the wearable device  220  may display a second directional visual indicator  250  (such as the directional visual indicator  250 B) external to the wearable device  220  in a second direction of travel and turn off the first directional visual indicator, as further described herein. In some implementations, the wearable device  220  may have one or more sections of the wearable device  220  that may display a directional visual indicator  250 . For example, a first section  223  (such as a first side section) of the wearable device  220  may display a directional visual indicator  250 A and a second section  225  (such as a second side section) of the wearable device  220  may display a directional visual indicator  250 B. As another example, in addition to the directional visual indicators  250 A and B, a third section  227  (such as a top section) of the wearable device  220  may display a directional visual indicator  250 C and a fourth section  229  (such as a bottom section) of the wearable device  220  may display a directional visual indicator  250 D. As another example, only one of the sections of the wearable device  220  (such as the first section  223 , the second section  225 , or the third section  227 ) may display a directional visual indicator  250 . As described herein, the wearable device  220  may display any number of directional visual indicators, including, but not limited to eight directional visual indicators, as shown in  FIG.  6   . 
     In some implementations, when the direction of travel is about to change from the first direction (such as a North direction) to the second direction (such as an East direction), the second section  225  of the wearable device  220  may display the directional visual indicator  250 B external to the wearable device  220  in the second direction of travel and the third section  227  of the wearable device  220  may turn off the directional visual indicator  250 C. For example, if the wearable device  220  is a smart watch, the directional visual indicator  250 B is displayed from the second section  225  of the wearable device  220  to a user&#39;s hand. When the direction of travel is about to change from the first direction (such as a North direction) to a third direction (such as a West direction), the first section  223  of the wearable device  220  may display the directional visual indicator  250 A external to the wearable device  220  in the third direction of travel and the third section  227  of the wearable device  220  may turn off the directional visual indicator  250 C. For example, if the wearable device  220  is a smart watch, the directional visual indicator  250 A is displayed the first section  223  of the wearable device  220  to a user&#39;s arm. When the direction of travel is about to change from the first direction (such as a North direction) to a fourth direction (such as a South direction), the fourth section  229  of the wearable device  220  may display the directional visual indicator  250 D external to the wearable device  220  in the fourth direction of travel and the third section  227  of the wearable device  220  may turn off the directional visual indicator  250 C. When the direction of travel does not change and remains the same (such as a first or North direction), the third section  227  of the wearable device  220  may continue to display the directional visual indicator  250 C external to the wearable device  220  in the first direction of travel. 
     In some implementations, the directional visual indicator  250  may be a directional light or a directional projection displayed external to the wearable device  220  in the direction of travel. For example, the directional projection may be a projection of a map for the navigation in the direction of travel, a projection of an arrow pointing in the direction of travel, or a projection of a text message indicating the direction of travel. The directional light may be a static light, a moving light in the direction of travel, a sliding light, a flashing light, or a glowing light. In some implementations, the directional visual indicator  250  may be a holographic projection. In some implementations, one or more of the sections of the wearable device  220  may include a projector that is configured to display a directional projection external to the wearable device  220 , and one or more of the sections of the wearable device  220  may include one or more light-emitting diode (LED) lights that are configured to display a directional light external to the wearable device  220 . For example, each of the first section  223 , the second section  225 , the third section  227 , and the fourth section  229  of the wearable device  220  may include a projector that is configured to display a directional projection external to the wearable device  220 , and each of the first section  223 , the second section  225 , the third section  227 , and the fourth section  229  of the wearable device  220  may include one or more LED lights that are configured to display a directional light external to the wearable device  220 . In some implementations, only the first section  223  and the second section  225  of the wearable device  220  may include a projector that is configured to display a directional projection external to the wearable device  220 . As further described herein, the wearable device  220  may include any number of projectors and any number of LED lights, such as two or four projectors and four or eight LED lights, as shown in  FIG.  6   . In some implementations, the wearable device  220  may display a first projection of a map, a first projection of an arrow, or a first projection of a text message indicating the direction of travel as the directional visual indicator  250 C. When the direction of travel is about to change from a first direction (such as a North direction) to a second direction (such as an East direction), the wearable device  220  may display a second projection of a map, a second projection of an arrow, or a second projection of a text message as the directional visual indicator  250 B external to the wearable device  220  in a second direction of travel and turn off the directional visual indicator  250 C. For example, the directional visual indicator  250 C may be the first projection of an arrow pointing forward and indicating to continue in a straight or North direction, and the directional visual indicator  250 B may be the second projection of an arrow pointing to the right and indicating to turn right or an East direction. In some implementations, the wearable device  220  may display a first static light, a first moving light, a first sliding light, a first flashing light, or a first glowing light indicating the direction of travel as the directional visual indicator  250 C. When the direction of travel is about to change from a first direction (such as a North direction) to a second direction (such as an East direction), the wearable device  220  may display a second static light, a second moving light, a second sliding light, a second flashing light, or a second glowing light as the directional visual indicator  250 B external to the wearable device  220  in a second direction of travel and turn off the directional visual indicator  250 C. For example, the directional visual indicator  250 C may be the first static light displayed from the third section  227  of the wearable device  220  and indicating to continue in a straight or North direction, and the directional visual indicator  250 B may be the second static light displayed from the second section  225  of the wearable device  220  and indicating to turn right or an East direction. 
     In some implementations, if only one section of the wearable device  220  (such as the second section  225 ) displays a directional visual indicator  250 , the same section of the wearable device  220  may display the updated directional visual indicator  250  when the direction of travel changes. For example, if the direction of travel is a first direction (such as a North direction), the wearable device  220  (such as the second section  225  of the wearable device  220 ) may display a directional visual indicator  250  (such as the directional visual indicator  250 B) external to the wearable device  220  indicating a first direction of travel. For example, the directional visual indicator  250  may a projection of a map for the navigation indicating the first direction of travel, a projection of an arrow pointing in the first direction of travel, a projection of a text message indicating the first direction of travel, or a holographic projection indicating the direction of travel. When the direction of travel is about to change from the first direction (such as a North direction) to a second direction (such as an East direction), the same section of the wearable device  220  (such as the second section  225 ) may display the directional visual indicator  250  external to the wearable device  220  indicating the second direction of travel. For example, the projection of the arrow pointing in the first direction of travel may change to an arrow pointing to the second direction of travel. As another example, the projection of the text message indicating the first direction of travel may change to a text message indicating the second direction of travel. 
     In some implementations, when the direction of travel is about to change from a first direction (such as a North direction) to a second direction (such as an East direction), the wearable device  220  may increase a light intensity of the displayed directional visual indicator  250  (such as a directional light or a directional projection) as the wearable device  220  gets closer to the change in the direction of travel. For example, when the wearable device  220  is at a first distance (such as a first distance that is greater than 50 meters) from the location where the change in the direction of travel will occur, the wearable device  220  may display the directional visual indicator  250  using a first light intensity level (the lowest light intensity level). When the wearable device  220  is at a second distance (such as a second distance that is between 30 meters to 50 meters) from the change in the direction of travel, the wearable device  220  may display the directional visual indicator  250  using a second light intensity level. When the wearable device  220  is at a third distance (such as a third distance that is between 15 meters to 30 meters) from the change in the direction of travel, the wearable device  220  may display the directional visual indicator  250  using a third light intensity level. When the wearable device  220  is at a fourth distance (such as a fourth distance that is between 0 meters to 15 meters) from the change in the direction of travel, the wearable device  220  may display the directional visual indicator  250  using a fourth light intensity level (the highest light intensity level). In some implementations, when the wearable device  220  at the fourth distance (such as the fourth distance that is between 0 meters to 15 meters) from the change in the direction of travel, the wearable device  220  may start blinking the directional visual indicator  250 . In some implementations, when the wearable device  220  at the fourth distance (such as the fourth distance that is between 0 meters to 15 meters) from the change in the direction of travel, the wearable device  220  may display the directional visual indicator  250  using the fourth light intensity level (the highest light intensity level) and may start blinking the directional visual indicator  250 . In some implementations, the wearable device  220  may increase a blink rate of the displayed directional visual indicator  250  (such as a directional light or a directional projection) as the wearable device  220  gets closer to the change in the direction of travel. In some implementations, the wearable device  220  may start blinking the directional visual indicator  250  or may increase the light intensity level of the of the directional visual indicator  250  based on other conditions, such as weather conditions. For example, if the wearable device  220  detects a bright and sunny day (such as based on a detected light intensity from the sun), the wearable device  220  may start blinking the directional visual indicator  250 , or may increase the light intensity level of the of the directional visual indicator  250 , or both. 
     In some implementations, when the available power (which may be referred to as the available battery power) of the wearable device  220  falls below a power level (or power threshold) or the wearable device  220  enters a power save mode, the wearable device  220  may turn off the display and the projectors of the wearable device  220  in order to save power. When the display and the projectors are turned off, the wearable device  220  may use the LED lights to display the directional lights as the directional visual indicators  250 , since the LED lights use less power compared to the display and the projectors. 
     In some implementations, two or more of the directional visual indicators  250  may be displayed during emergency situations. For example, one or more of the sensors of the wearable device  220  (such as one or more of an accelerometer, a gyroscope, a magnetometer, and a heart rate monitor) may detect an emergency situation, such as a car crash involving the user of the wearable device  220  or a sudden fall by the user of the wearable device  220 . After detecting the emergency situation, the wearable device  220  may display two or more directional visual indicators  250  external to the wearable device  220 . For example, the wearable device  220  may display two or more directional visual indicators  250  external to the wearable device  220  having a red or orange color. The two or more directional visual indicators  250  also may blink, flash, or glow. The red or orange color of the directional visual indicators  250  and the blinking, flashing or glowing of the directional visual indicators  250  may be visible from a distance (especially in the dark or low light conditions) and thus may bring help to the user of the wearable device  220  that may be in an emergency situation. In some implementations, the two or more directional visual indicators  250  may be two or more directional lights, two or more directional projections, or at least one directional light and at least one directional projection. 
       FIG.  3    shows a conceptual diagram  300  of an example wearable device configured to display directional visual indicators to indicate a change in the direction of travel during navigation. As described in  FIG.  2   , the wearable device  220  may include a display  221  and a first section  223  (such as a first side section), a second section  225  (such as a second side section), a third section  227  (such as a top section), a fourth section  229  (such as a bottom section) of the wearable device  220  that may display directional visual indicators  250 . 
     In some implementations, at stage  1 , the third section  227  of the wearable device  220  may display a directional projection, such as a first projection of an arrow  350  external to the wearable device  220  as the directional visual indicator  250 C indicating the direction of travel. For example, the direction of travel may be a first direction, such as a straight or North direction. At stage  2 , when the direction of travel is about to change from the first direction (such as a North direction) to a second direction (such as an East direction or turn right), the second section  225  of the wearable device  220  may display a second projection of an arrow  351  as the directional visual indicator  250 B in a second direction of travel and turn off the first projection of an arrow  350  (the directional visual indicator  250 C). As described in  FIG.  2   , in some implementations, when the direction of travel is about to change from the first direction to the second direction, the wearable device  220  may increase a light intensity or a blink rate of the displayed directional visual indicator  250 B (such as the second projection of the arrow  351 ) as the wearable device  220  gets closer to the location where the change in the direction of travel will occur. For example, when the direction of travel is about to change from the North direction to the East direction, the wearable device  220  may increase a light intensity or a blink rate of the second projection of the arrow  351  as the wearable device  220  gets closer to the location where the direction of travel will change from the North direction to the East direction, such as the location where the user will turn right in the East direction. At stage  3 , after the direction of travel changes from the first direction (such as the North direction) to the second direction (such as the East direction), the third section  227  of the wearable device  220  may display a third projection of an arrow  352  as the directional visual indicator  250 C in the second direction of travel (such as the East direction) and turn off the second projection of the arrow  351  (the directional visual indicator  250 B). 
       FIG.  4    shows a conceptual diagram  400  of another example wearable device configured to display directional visual indicators to indicate a change in the direction of travel during navigation. As described in  FIG.  2   , the wearable device  220  may include a display  221  and a first section  223  (such as a first side section), a second section  225  (such as a second side section), a third section  227  (such as a top section), a fourth section  229  (such as a bottom section) of the wearable device  220  that may display directional visual indicators  250 . 
     In some implementations, at stage  1 , the third section  227  of the wearable device  220  may display a directional projection, such as a first projection of a text message  450  external to the wearable device  220  as the directional visual indicator  250 C indicating the direction of travel. For example, the direction of travel may be a first direction, such as a straight or North direction, and the first projection of the text message  450  may indicate to “continue straight” or continue in a North direction. At stage  2 , when the direction of travel is about to change from the first direction (such as the North direction) to a second direction (such as the East direction or turn right), the second section  225  of the wearable device  220  may display a second projection of a text message  451  as the directional visual indicator  250 B in a second direction of travel and turn off the first projection of the text message  450  (the directional visual indicator  250 C). For example, the second projection of the text message  451  may indicate to “turn right” or turn in an East direction. As described in  FIG.  2   , in some implementations, when the direction of travel is about to change from the first direction to the second direction, the wearable device  220  may increase a light intensity or a blink rate of the displayed directional visual indicator  250 B (such as the second projection of the text message  451 ) as the wearable device  220  gets closer to the location where the change in the direction of travel will occur. For example, when the direction of travel is about to change from the North direction to the East direction, the wearable device  220  may increase a light intensity or a blink rate of the second projection of the text message  451  as the wearable device  220  gets closer to the location where the direction of travel will change from the North direction to the East direction, such as the location where the user will turn right in the East direction. At stage  3 , after the direction of travel changes from the first direction (such as the North direction) to the second direction (such as the East direction), the third section  227  of the wearable device  220  may display a third projection of a text message  452  as the directional visual indicator  250 C in the second direction of travel (such as the East direction) and turn off the second projection of the text message  451  (the directional visual indicator  250 B). For example, the third projection of the text message  452  may indicate to “continue straight” or continue in the East direction. 
       FIG.  5    shows a conceptual diagram  500  of another example wearable device configured to display directional visual indicators to indicate a change in the direction of travel during navigation. As described in  FIG.  2   , the wearable device  220  may include a display  221  and a first section  223  (such as a first side section), a second section  225  (such as a second side section), a third section  227  (such as a top section), a fourth section  229  (such as a bottom section) of the wearable device  220  that may display directional visual indicators  250 . 
     In some implementations, at stage  1 , the third section  227  of the wearable device  220  may display a directional light, such as a static light  550  external to the wearable device  220  as the directional visual indicator  250 C indicating the direction of travel. For example, the direction of travel may be a first direction, such as a straight or North direction. At stage  2 , when the direction of travel is about to change from the first direction (such as the North direction) to a third direction (such as the West direction or turn left), the first section  223  of the wearable device  220  may display a flashing light  551  as the directional visual indicator  250 A in a third direction of travel and turn off the static light  550  (the directional visual indicator  250 A). For example, the flashing light  551  being displayed as the directional visual indicator  250 A may indicate to “turn left” or turn in a West direction. As described in  FIG.  2   , in some implementations, when the direction of travel is about to change from the first direction to the third direction, the wearable device  220  may increase a light intensity or a blink rate (or flash rate) of the displayed directional visual indicator  250 A (such as the flashing light  551 ) as the wearable device  220  gets closer to the location where the change in the direction of travel will occur. At stage  3 , after the direction of travel changes from the first direction (such as the North direction) to the third direction (such as the West direction), the third section  227  of the wearable device  220  may display a static light  552  as the directional visual indicator  250 C in the third direction of travel (such as the West direction) and turn off the flashing light  551  (the directional visual indicator  250 A). For example, the static light  552  may indicate to “continue straight” or continue in the West direction. 
       FIG.  6    shows a conceptual diagram  600  of another example wearable device configured to display directional visual indicators to indicate a change in the direction of travel during navigation. The wearable device  220  may include a display  221  and a first section  223  (such as a first side section), a second section  225  (such as a second side section), a third section  227  (such as a top section), a fourth section  229  (such as a bottom section) of the wearable device  220 . In some implementations, at least one section of the wearable device  220  (such as the second section  225 ) may display a directional visual indicator  250 . 
     In some implementations, only one of the sections of the wearable device  220  (such as the second section  225 ) may display a directional visual indicator  250 . At stage  1 , the second section  225  of the wearable device  220  may display a directional projection, such as a first projection of an arrow  650  external to the wearable device  220  as the directional visual indicator  250 B indicating the direction of travel. For example, the direction of travel may be a first direction, such as a straight or North direction. Although the projection of an arrow is shown in  FIG.  6   , the directional projection may be a projection of a text message indicating the direction of travel or a holographic projection indicating the direction of travel. At stage  2 , when the direction of travel is about to change from the first direction (such as a North direction) to a second direction (such as an East direction or turn right), the second section  225  of the wearable device  220  may display a second projection of an arrow  651  as the directional visual indicator  250 B in a second direction of travel and turn off the first projection of the arrow  650 . The second section  225  of the wearable device  220  may stop displaying the first projection of the arrow  650  and begin displaying the second projection of the arrow  651  that indicates the second direction of travel (such as an East direction or turn right). As described in  FIG.  2   , in some implementations, when the direction of travel is about to change from the first direction to the second direction, the wearable device  220  may increase a light intensity or a blink rate of the displayed directional visual indicator  250 B (such as the second projection of the arrow  651 ) as the wearable device  220  gets closer to the location where the change in the direction of travel will occur. At stage  3 , after the direction of travel changes from the first direction (such as the North direction) to the second direction (such as the East direction), the second section  225  of the wearable device  220  may display a third projection of an arrow  652  as the directional visual indicator  250 B in the second direction of travel (such as the East direction) and turn off the second projection of the arrow  651 . The second section  225  of the wearable device  220  may stop displaying the second projection of the arrow  651  and begin displaying the third projection of the arrow  652 . 
       FIG.  7    shows a conceptual diagram  700  of another example wearable device configured to display additional directional visual indicators. As described in  FIG.  2   , in some implementations, the wearable device  220  may have one or more sections of the wearable device  220  that may display a directional visual indicator  250 . For example, a first section  223  (such as a first side section) of the wearable device  220  may display a directional visual indicator  250 A and a second section  225  (such as a second side section) of the wearable device  220  may display a directional visual indicator  250 B. In addition to the directional visual indicators  250 A and B, a third section  227  (such as a top section) of the wearable device  220  may display a directional visual indicator  250 C and a fourth section  229  (such as a bottom section) of the wearable device  220  may display a directional visual indicator  250 D. 
     As shown in  FIG.  7   , the wearable device  220  may display a total of eight directional visual indicators  250 . In addition to the directional visual indicators  250 A-D, the wearable device  220  may display directional visual indicators  250 E-H. For example, a fifth section  722  (such as a first corner section) of the wearable device  220  may display a directional visual indicator  250 E, a sixth section  724  (such as a second corner section) of the wearable device  220  may display a directional visual indicator  250 F, a seventh section  726  (such as a third corner section) of the wearable device  220  may display a directional visual indicator  250 G, and an eighth section  728  (such as a fourth corner section) of the wearable device  220  may display a directional visual indicator  250 H. The wearable device  220  may display at least one of the directional visual indicators  250 A-H for navigation similarly as described with reference to  FIGS.  2 - 6   . 
       FIG.  8    shows conceptual diagrams  800  of another example wearable device including LED lights that are configured to display directional visual indicators. As described in  FIG.  2   , the wearable device  220  may include a display  221  and a first section  223  (such as a first side section), a second section  225  (such as a second side section), a third section  227  (such as a top section), a fourth section  229  (such as a bottom section) of the wearable device  220  that may display directional visual indicators. 
     In some implementations, the wearable device  220  may include one or more LED lights that are configured to display directional visual indicators. For example, as shown in option  1  of  FIG.  8   , the wearable device  220  may include four LED lights  870 A-D that are configured to display directional visual indicators. The first LED light  870 A may be located in the first section  223 , the second LED light  870 B may be located in the second section  225 , the third LED light  870 C may be located in the third section  227 , and the fourth LED light  870 D may be located in the fourth section  229  of the wearable device  220 . The four LED lights  870 A-D may be any type of LED lights having various shapes, such as the arrow shape shown in  FIG.  8   . As another example, as shown in option  2  of  FIG.  8   , the wearable device  220  may include sliding lights  888  in addition to the four LED lights  870 A-D that are configured to display directional visual indicators. As another example, as shown in option  3  of  FIG.  8   , the wearable device  220  may include four LED lights  875 A-D that are configured to display directional visual indicators. The first LED light  875 A may be located in a different face of the first section  223 , the second LED light  875 B may be located in a difference face of the second section  225 , the third LED light  875 C (not shown) may be located in a different face of the third section  227 , and the fourth LED light  875 D (not shown) may be located in a different face of the fourth section  229  of the wearable device  220 . The four LED lights  875 A-D may be any type of LED lights having various shapes, such as the arrow shape shown in  FIG.  8   . 
       FIG.  9    shows a conceptual diagram  900  of another example wearable device configured to display directional visual indicators to indicate an emergency situation. As described in  FIG.  2   , the wearable device  220  may include a display  221  and a first section  223  (such as a first side section), a second section  225  (such as a second side section) a third section  227  (such as a top section), a fourth section  229  (such as a bottom section) of the wearable device  220  that may display directional visual indicators  250 . 
     In some implementations, at stage  1 , the third section  227  of the wearable device  220  may display a directional projection or a directional light external to the wearable device  220  as the directional visual indicator  250 C indicating the direction of travel (such as the North direction). In some implementations, at stage  2 , when the wearable device  220  detects an emergency situation, the wearable device  220  may display two or more directional visual indicators  250  external to the wearable device  220 . For example, one or more of the sensors of the wearable device  220  (such as one or more of an accelerometer, a gyroscope, a magnetometer, and a heart rate monitor) may detect an emergency situation, such as a car crash involving the user of the wearable device  220  or a sudden fall by the user of the wearable device  220 . In some implementations, after detecting the emergency situation, the wearable device  220  may display two or more directional visual indicators  250  external to the wearable device  220  having a red or orange color. The two or more directional visual indicators  250  also may blink, flash, or glow. For example, the directional visual indicators  250 A and  250 B may be displayed as directional lights having a red or orange color, and the directional visual indicators  250 C and  250 D may be displayed as directional lights that blink, flash, or glow. As another example, the directional visual indicators  250 A-D may be displayed as directional lights or directional projections having a red or orange color that also blink, flash, or glow. The red or orange color of the two or more directional visual indicators  250  and the blinking, flashing or glowing of the two or more directional visual indicators  250  may be visible from a distance and thus may bring help to the user of the wearable device  220  that may be in an emergency situation. In some implementations, the two or more directional visual indicators  250  may be two or more directional lights, two or more directional projections, or at least one directional light and at least one directional projection. 
       FIG.  10    depicts a flowchart  1000  with example operations performed by a wearable device to display directional visual indicators for navigation. 
     At block  1010 , a wearable device (such as the wearable device  220  shown in  FIG.  2   ) may receive navigation signals while the wearable device is in a navigation mode. The navigation signals may indicate a direction of travel. 
     At block  1020 , the wearable device may display a first directional visual indicator corresponding to the direction of travel. The first directional visual indicator may be displayed external to the wearable device. 
       FIG.  11    shows a block diagram of an example wireless communication device  1100 . In some implementations, the wireless communication device  1100  can be an example of a device for use in a wearable device such as the wearable device  220  described herein. The wireless communication device  1100  may be generally referred to as an apparatus or a wireless communication apparatus. The wireless communication device  1100  is capable of transmitting (or outputting for transmission) and receiving wireless communications (for example, in the form of wireless packets). For example, the wireless communication device  1100  can be configured to transmit and receive navigation signals from one or more satellites that are part of one or more satellite-based communication systems, such as one or more of a global positioning system (GPS), a global navigation satellite system (GLONASS), and a satellite-based augmentation system (SBAS). As another example, the wireless communication device  1100  can be configured to transmit and receive packets in the form of PPDUs and MPDUs conforming to an IEEE 802.11 standard, such as that defined by the IEEE 802.11-2016 specification or amendments thereof including, but not limited to, 802.11ac, 802.11ah, 802.11ad, 802.11 ay, 802.11ax, 802.11az, 802.11ba and 802.11be. 
     The wireless communication device  1100  can be, or can include, a chip, system on chip (SoC), chipset, package or device that includes one or more modems  1102 , for example, a Wi-Fi (IEEE 802.11 compliant) modem. In some implementations, the one or more modems  1102  (collectively “the modem  1102 ”) additionally include a WWAN modem (for example, a 3GPP 4G LTE or 5G compliant modem). In some implementations, the wireless communication device  1100  also includes one or more radios  1104  (collectively “the radio  1104 ”). In some implementations, the wireless communication device  1100  further includes one or more processors, processing blocks or processing elements (collectively “the processor  1106 ”) and one or more memory blocks or elements (collectively “the memory  1108 ”). In some implementations, the processor  1106  and the memory  1108  may be referred to as the processing system. 
     The modem  1102  can include an intelligent hardware block or device such as, for example, an application-specific integrated circuit (ASIC) among other possibilities. The modem  1102  is generally configured to implement a PHY layer. For example, the modem  1102  is configured to modulate packets and to output the modulated packets to the radio  1104  for transmission over the wireless medium. The modem  1102  is similarly configured to obtain modulated packets received by the radio  1104  and to demodulate the packets to provide demodulated packets. In addition to a modulator and a demodulator, the modem  1102  may further include digital signal processing (DSP) circuitry, automatic gain control (AGC), a coder, a decoder, a multiplexer and a demultiplexer. For example, while in a transmission mode, data obtained from the processor  1106  is provided to a coder, which encodes the data to provide encoded bits. The encoded bits are then mapped to points in a modulation constellation (using a selected MCS) to provide modulated symbols. The modulated symbols may then be mapped to a number N SS  of spatial streams or a number N STS  of space-time streams. The modulated symbols in the respective spatial or space-time streams may then be multiplexed, transformed via an inverse fast Fourier transform (IFFT) block, and subsequently provided to the DSP circuitry for Tx windowing and filtering. The digital signals may then be provided to a digital-to-analog converter (DAC). The resultant analog signals may then be provided to a frequency upconverter, and ultimately, the radio  1104 . In implementations involving beamforming, the modulated symbols in the respective spatial streams are precoded via a steering matrix prior to their provision to the IFFT block. 
     While in a reception mode, digital signals received from the radio  1104  are provided to the DSP circuitry, which is configured to acquire a received signal, for example, by detecting the presence of the signal and estimating the initial timing and frequency offsets. The DSP circuitry is further configured to digitally condition the digital signals, for example, using channel (narrowband) filtering, analog impairment conditioning (such as correcting for I/Q imbalance), and applying digital gain to ultimately obtain a narrowband signal. The output of the DSP circuitry may then be fed to the AGC, which is configured to use information extracted from the digital signals, for example, in one or more received training fields, to determine an appropriate gain. The output of the DSP circuitry also is coupled with the demodulator, which is configured to extract modulated symbols from the signal and, for example, compute the logarithm likelihood ratios (LLRs) for each bit position of each subcarrier in each spatial stream. The demodulator is coupled with the decoder, which may be configured to process the LLRs to provide decoded bits. The decoded bits from all of the spatial streams are then fed to the demultiplexer for demultiplexing. The demultiplexed bits may then be descrambled and provided to the MAC layer (the processor  1106 ) for processing, evaluation or interpretation. 
     The radio  1104  generally includes at least one radio frequency (RF) transmitter (or “transmitter chain”) and at least one RF receiver (or “receiver chain”), which may be combined into one or more transceivers. For example, the RF transmitters and receivers may include various DSP circuitry including at least one power amplifier (PA) and at least one low-noise amplifier (LNA), respectively. The RF transmitters and receivers may in turn be coupled to one or more antennas. For example, in some implementations, the wireless communication device  1100  can include, or be coupled with, multiple transmit antennas (each with a corresponding transmit chain) and multiple receive antennas (each with a corresponding receive chain). The symbols output from the modem  1102  are provided to the radio  1104 , which then transmits the symbols via the coupled antennas. Similarly, symbols received via the antennas are obtained by the radio  1104 , which then provides the symbols to the modem  1102 . In some implementations, the radio  1104  and the one or more antennas may form one or more network interfaces (which also may be referred to as “interfaces”). 
     The processor  1106  can include an intelligent hardware block or device such as, for example, a processing core, a processing block, a central processing unit (CPU), a microprocessor, a microcontroller, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a programmable logic device (PLD) such as a field programmable gate array (FPGA), discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. The processor  1106  processes information received through the radio  1104  and the modem  1102 , and processes information to be output through the modem  1102  and the radio  1104  for transmission through the wireless medium. For example, the processor  1106  may implement a control plane and MAC layer configured to perform various operations related to the generation and transmission of MPDUs, frames or packets. The MAC layer is configured to perform or facilitate the coding and decoding of frames, spatial multiplexing, space-time block coding (STBC), beamforming, and OFDMA resource allocation, among other operations or techniques. In some implementations, the processor  1106  may generally control the modem  1102  to cause the modem to perform various operations described above. 
     The memory  1108  can include tangible storage media such as random-access memory (RAM) or read-only memory (ROM), or combinations thereof. The memory  1108  also can store non-transitory processor- or computer-executable software (SW) code containing instructions that, when executed by the processor  1106 , cause the processor to perform various operations described herein for wireless communication, including the generation, transmission, reception and interpretation of MPDUs, frames or packets. For example, various functions of components disclosed herein, or various blocks or steps of a method, operation, process or algorithm disclosed herein, can be implemented as one or more modules of one or more computer programs. 
       FIG.  12    shows a block diagram of an example wearable device  1220 . For example, the wearable device  1220  can be an example implementation of the wearable device  220  described herein. The wearable device  1220  includes a wireless communication device  1215 . For example, the wireless communication device  1215  may be an example implementation of the wireless communication device  1200  described with reference to  FIG.  11   . The wearable device  1220  may be generally referred to as an apparatus, wearable apparatus, or a mobile apparatus. In some implementations, the wearable device  1220  also may include a navigation unit  1216  coupled with the wireless communication device  1215 . In some implementations, the navigation unit  1216  may integrated in the wireless communication device  1215 . The navigation unit  1216  may transmit and receive navigation signals from one or more satellites that are part of one or more satellite-based communication systems. The wearable device  1220  also includes one or more antennas  1225  coupled with the wireless communication device  1215  to transmit and receive wireless communications (such as navigation signals). The wearable device  1220  additionally includes an application processor  1235  coupled with the wireless communication device  1215 , and a memory  1245  coupled with the application processor  1235 . In some implementations, the wearable device  1220  further includes a user interface (UI)  1255  (such as a touchscreen or keypad) and one or more display modules  1265 , which may be integrated with the UI  1255  to form a touchscreen display. The one or more display modules also may include projectors and LED lights that are used to display directional visual indicators external to the wearable device  1220  as described herein. In some implementations, the wearable device  1220  may further include one or more sensors  1275  such as, for example, one or more inertial sensors, accelerometers, temperature sensors, pressure sensors, or altitude sensors. Ones of the aforementioned components can communicate with other ones of the components directly or indirectly, over at least one bus. The wearable device  1220  further includes a housing that encompasses the wireless communication device  1215 , the application processor  1235 , the memory  1245 , and at least portions of the antennas  1225 , UI  1255 , and display modules  1265 . 
       FIGS.  1 - 12    and the operations described herein are examples meant to aid in understanding example implementations and should not be used to limit the potential implementations or limit the scope of the claims. Some implementations may perform additional operations, fewer operations, operations in parallel or in a different order, and some operations differently. 
     The foregoing disclosure provides illustration and description but is not intended to be exhaustive or to limit the aspects to the precise form disclosed. Modifications and variations may be made in light of the above disclosure or may be acquired from practice of the aspects. While the aspects of the disclosure have been described in terms of various examples, any combination of aspects from any of the examples is also within the scope of the disclosure. The examples in this disclosure are provided for pedagogical purposes. Alternatively, or in addition to the other examples described herein, examples include any combination of the following implementation options. 
     Clause 1. One aspect of the subject matter described in this disclosure can be implemented in a method for displaying directional visual indicators for navigation performed by a wearable device. The method may include receiving navigation signals while the wearable device may be in a navigation mode. The navigation signals may indicate a direction of travel. The method may include displaying a first directional visual indicator corresponding to the direction of travel. The first directional visual indicator may be displayed external to the wearable device. 
     Clause 2. The method of clause 1, where the first directional visual indicator displayed external to the wearable device may be a directional light or a directional projection displayed external to the wearable device in the direction of travel. 
     Clause 3. The method of any one or more of clauses 1-2, where the directional projection may be a projection of a map associated with the navigation in the direction of travel, a projection of an arrow pointing in the direction of travel, or a projection of a text message indicating the direction of travel. 
     Clause 4. The method of any one or more of clauses 1-3, where the directional light may be a static light, a moving light in the direction of travel, a sliding light, a flashing light, or a glowing light. 
     Clause 5. The method of any one or more of clauses 1-4, where the method may further include, if the direction of travel may be changing from a first direction to a second direction, displaying a second directional visual indicator external to the wearable device and turning off the first directional visual indicator. 
     Clause 6. The method of any one or more of clauses 1-5, where the method may further include displaying the second directional visual indicator with a higher light intensity level than the first directional visual indicator. The higher light intensity level of the displayed second directional visual indicator may indicate the direction of travel may be changing from the first direction to the second direction. 
     Clause 7. The method of any one or more of clauses 1-6, where the method may further include blinking the displayed second directional visual indicator. The blinking of the displayed second directional visual indicator may indicate the direction of travel may be changing from the first direction to the second direction. 
     Clause 8. The method of any one or more of clauses 1-7, where the method may further include, if the direction of travel may be changing from a first direction to a second direction, displaying a second directional visual indicator external to the wearable device from a first side section of the wearable device in the second direction and turning off the first directional visual indicator, and if the direction of travel may be changing from the first direction to a third direction, displaying a third directional visual indicator external to the wearable device from a second side section of the wearable device in the third direction and turning off the first directional visual indicator. 
     Clause 9. The method of any one or more of clauses 1-8, where the first directional visual indicator may be displayed external to the wearable device from a top section of the wearable device in the first direction. The method may further include, if the direction of travel may be remaining the same, continuing to display the first directional visual indicator external to the wearable device from the top section of the wearable device in the first direction, and if the direction of travel may be changing from the first direction to a fourth direction that may be an opposite direction compared to the first direction, displaying a fourth directional visual indicator external to the wearable device from a bottom section of the wearable device in the fourth direction. 
     Clause 10. The method of any one or more of clauses 1-9, where, if the wearable device is a smart watch, the method of displaying the second directional visual indicator external to the wearable device from the first side section of the wearable device in the second direction may include displaying the second directional visual indicator from the first side section of the wearable device to a user&#39;s hand, and the method of displaying the third directional visual indicator external to the wearable device from the second side section of the wearable device in the third direction may include displaying the third directional visual indicator from the second side section of the wearable device to a user&#39;s arm. 
     Clause 11. The method of any one or more of clauses 1-10, where the method may further include detecting, by one or more sensors of the wearable device, an emergency condition, and displaying two or more directional visual indicators external to the wearable device from two or more sections of the wearable device in two or more directions in response to detecting the emergency condition. 
     Clause 12. The method of any one or more of clauses 1-11, where the two or more directional visual indicators may be two or more directional lights, two or more directional projections, or at least one directional light and at least one directional projection. 
     Clause 13. The method of any one or more of clauses 1-12, where the navigation signals may be received by the wearable device from a satellite. 
     Clause 14. Another aspect of the subject matter described in this disclosure can be implemented in a wearable device configured to display directional visual indicators for navigation. The wearable device may include one or more interfaces and one or more display modules. The one or more interfaces may be configured to receive navigation signals while the wearable device may be in a navigation mode. The navigation signals may indicate a direction of travel. The one or more display modules may be configured to display a first directional visual indicator corresponding to the direction of travel. The first directional visual indicator may be displayed external to the wearable device. 
     Clause 15. The wearable device of clause 14, where the first directional visual indicator displayed external to the wearable device may be a directional light or a directional projection displayed external to the wearable device in the direction of travel. 
     Clause 16. The wearable device of any one or more of clauses 14-15, where the directional projection may be a projection of a map associated with the navigation in the direction of travel, a projection of an arrow pointing in the direction of travel, or a projection of a text message indicating the direction of travel. 
     Clause 17. The wearable device of any one or more of clauses 14-16, where the directional light may be a static light, a moving light in the direction of travel, a sliding light, a flashing light, or a glowing light. 
     Clause 18. The wearable device of any one or more of clauses 14-17, where, if the direction of travel may be changing from a first direction to a second direction, the one or more display modules may be configured to display a second directional visual indicator external to the wearable device, and turn off the first directional visual indicator. 
     Clause 19. The wearable device of any one or more of clauses 14-18, where the one or more display modules may be configured to display the second directional visual indicator with a higher light intensity level than the first directional visual indicator. The higher light intensity level of the displayed second directional visual indicator may indicate the direction of travel may be changing from the first direction to the second direction. 
     Clause 20. The wearable device of any one or more of clauses 14-19, where the one or more display modules may be configured to blink the displayed second directional visual indicator to indicate the direction of travel may be changing from the first direction to the second direction. 
     Clause 21. The wearable device of any one or more of clauses 14-20, where, if the direction of travel may be changing from a first direction to a second direction, the one or more display modules may be configured to display a second directional visual indicator external to the wearable device from a first side section of the wearable device in the second direction and turn off the first directional visual indicator, and if the direction of travel may be changing from the first direction to a third direction, the one or more display modules may be configured to display a third directional visual indicator external to the wearable device from a second side section of the wearable device in the third direction and turn off the first directional visual indicator. 
     Clause 22. The wearable device of any one or more of clauses 14-21, where the one or more display modules may be configured to display the first directional visual indicator external to the wearable device from a top section of the wearable device in the first direction. If the direction of travel may be remaining the same, the one or more display modules may be configured to continue to display the first directional visual indicator external to the wearable device from the top section of the wearable device in the first direction, and if the direction of travel may be changing from the first direction to a fourth direction that may be an opposite direction compared to the first direction, the one or more display modules may be configured to display a fourth directional visual indicator external to the wearable device from a bottom section of the wearable device in the fourth direction. 
     Clause 23. The wearable device of any one or more of clauses 14-22, where, if the wearable device is a smart watch, the one or more display modules may be configured to display the second directional visual indicator from the first side section of the wearable device to a user&#39;s hand, and the one or more display modules may be configured to display the third directional visual indicator from the second side section of the wearable device to a user&#39;s arm. 
     Clause 24. The wearable device of any one or more of clauses 14-23, further including one or more sensors configured to detect an emergency condition. The one or more display modules may be configured to display two or more directional visual indicators external to the wearable device from two or more sections of the wearable device in two or more directions in response to a detection of the emergency condition. 
     Clause 25. The wearable device of any one or more of clauses 14-24, where the two or more directional visual indicators may be two or more directional lights, two or more directional projections, or at least one directional light and at least one directional projection. 
     Clause 26. Another aspect of the subject matter described in this disclosure can be implemented in an apparatus configured to display directional visual indicators for navigation. The apparatus may include means for receiving navigation signals while the apparatus may be in a navigation mode. The navigation signals may indicate a direction of travel. The apparatus may include means for displaying a first directional visual indicator corresponding to the direction of travel. The first directional visual indicator may be displayed external to the apparatus. 
     Clause 27. The apparatus of clause 26, where the first directional visual indicator may be a directional light or a directional projection displayed external to the apparatus in the direction of travel. 
     Clause 28. The apparatus of any one or more of clauses 26-27, where the directional projection may be a projection of a map associated with the navigation in the direction of travel, a projection of an arrow pointing in the direction of travel, or a projection of a text message indicating the direction of travel. 
     Clause 29. The apparatus of any one or more of clauses 26-28, where the directional light may be a static light, a moving light in the direction of travel, a sliding light, a flashing light, or a glowing light. 
     Clause 30. The apparatus of any one or more of clauses 26-29, further including means for displaying a second directional visual indicator external to the apparatus if the direction of travel may be changing from a first direction to a second direction. 
     Clause 31. The apparatus of any one or more of clauses 26-30, further including means for displaying the second directional visual indicator with a higher light intensity level than the first directional visual indicator. The higher light intensity level of the displayed second directional visual indicator may indicate the direction of travel may be changing from the first direction to the second direction. 
     Clause 32. The apparatus of any one or more of clauses 26-31, further including means for displaying a second directional visual indicator external to the apparatus from a first side section of the apparatus in a second direction if the direction of travel may be changing from a first direction to the second direction, and means for displaying a third directional visual indicator external to the apparatus from a second side section of the apparatus in a third direction if the direction of travel may be changing from the first direction to the third direction. 
     Clause 33. The apparatus of any one or more of clauses 26-32, further including means for displaying the first directional visual indicator from a top section of the apparatus in the first direction if the direction of travel may be remaining in the first direction, and means for displaying a fourth directional visual indicator external to the apparatus from a bottom section of the apparatus in a fourth direction if the direction of travel may be changing from the first direction to the fourth direction. 
     Clause 34. The apparatus of any one or more of clauses 26-33, further including means for detecting an emergency condition, and means for displaying two or more directional visual indicators external to the apparatus from two or more sections of the apparatus in two or more directions in response to detecting the emergency condition. 
     Clause 35. The apparatus of any one or more of clauses 26-34, where the two or more directional visual indicators may be two or more directional lights, two or more directional projections, or at least one directional light and at least one directional projection. 
     Clause 36. Another aspect of the subject matter described in this disclosure can be implemented in a non-transitory computer-readable medium having stored therein instructions which, when executed by a processor of a wearable device, may cause the wearable device to receive navigation signals while the wearable device may be in a navigation mode. The navigation signals may indicate a direction of travel. The instructions, when executed by the processor of the wearable device, may cause the wearable device to display a first directional visual indicator corresponding to the direction of travel. The first directional visual indicator may be displayed external to the wearable device. 
     Clause 37. The non-transitory computer-readable medium of clause 36, where the first directional visual indicator displayed external to the wearable device may be a directional light or a directional projection displayed external to the wearable device in the direction of travel. 
     Clause 38. The non-transitory computer-readable medium of clauses 36-37, where the directional projection may be a projection of a map associated with a navigation in the direction of travel, a projection of an arrow pointing in the direction of travel, or a projection of a text message indicating the direction of travel. 
     Clause 39. The non-transitory computer-readable medium of clauses 36-38, where the directional light may be a static light, a moving light in the direction of travel, a sliding light, a flashing light, or a glowing light. 
     Clause 40. The non-transitory computer-readable medium of clauses 36-39, where the instructions, when executed by the processor of the wearable device, may cause the wearable device to display a second directional visual indicator external to the wearable device and turn off the first directional visual indicator if the direction of travel may be changing from a first direction to a second direction. 
     Clause 41. The non-transitory computer-readable medium of clauses 36-40, where the instructions, when executed by the processor of the wearable device, may cause the wearable device to display the second directional visual indicator with a higher light intensity level than the first directional visual indicator. The higher light intensity level of the displayed second directional visual indicator may indicate the direction of travel may be changing from the first direction to the second direction. 
     Clause 42. The non-transitory computer-readable medium of clauses 36-41, where the instructions, when executed by the processor of the wearable device, may cause the wearable device to blink the displayed second directional visual indicator to indicate the direction of travel may be changing from the first direction to the second direction. 
     Clause 43. The non-transitory computer-readable medium of clauses 36-42, where the instructions, when executed by the processor of the wearable device, may cause the wearable device to, if the direction of travel may be changing from a first direction to a second direction, display a second directional visual indicator external to the wearable device from a first side section of the wearable device in the second direction and turn off the first directional visual indicator, and if the direction of travel may be changing from the first direction to a third direction, display a third directional visual indicator external to the wearable device from a second side section of the wearable device in the third direction and turn off the first directional visual indicator. 
     Clause 44. The non-transitory computer-readable medium of clauses 36-43, where the instructions, when executed by the processor of the wearable device, may cause the wearable device to display the first directional visual indicator external to the wearable device from a top section of the wearable device in the first direction. The instructions, when executed by the processor of the wearable device, may cause the wearable device to, if the direction of travel may be remaining the same, continue to display the first directional visual indicator external to the wearable device from the top section of the wearable device in the first direction, and if the direction of travel may be changing from the first direction to a fourth direction that may be an opposite direction compared to the first direction, display a fourth directional visual indicator external to the wearable device from a bottom section of the wearable device in the fourth direction. 
     Clause 45. The non-transitory computer-readable medium of clauses 36-44, where the instructions, when executed by the processor of the wearable device, may cause the wearable device to detect an emergency condition, and display two or more directional visual indicators external to the wearable device from two or more sections of the wearable device in two or more directions in response to a detection of the emergency condition. 
     As used herein, a phrase referring to “at least one of” a list of items refers to any combination of those items, including single members. As an example, “at least one of: a, b, or c” is intended to cover: a, b, c, a-b, a-c, b-c, and a-b-c. 
     The various illustrative logics, logical blocks, units, modules, circuits and algorithm processes described in connection with the implementations disclosed herein may be implemented as electronic hardware, computer software, or combinations of both. The interchangeability of hardware and software has been described generally, in terms of functionality, and illustrated in the various illustrative components, blocks, units, modules, circuits and processes described throughout. Whether such functionality is implemented in hardware or software depends upon the particular application and design constraints imposed on the overall system. 
     The hardware and data processing apparatus used to implement the various illustrative logics, logical blocks, modules and circuits described in connection with the aspects disclosed herein may be implemented or performed with a general purpose single- or multi-chip processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general-purpose processor may be a microprocessor, or any conventional processor, controller, microcontroller, or state machine. A processor also may 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. In some implementations, particular processes and methods may be performed by circuitry that is specific to a given function. 
     In one or more aspects, the functions described may be implemented in hardware, digital electronic circuitry, computer software, firmware, including the structures disclosed in this specification and their structural equivalents thereof, or in any combination thereof. Implementations of the subject matter described in this specification also can be implemented as one or more computer programs, i.e., one or more modules of computer program instructions, encoded on a computer storage media for execution by, or to control the operation of, data processing apparatus. 
     If implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. The processes of a method or algorithm disclosed herein may be implemented in a processor-executable software module which may reside on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that can be enabled to transfer a computer program from one place to another. A storage media may be any available media that may be accessed by a computer. By way of example, and not limitation, such computer-readable media may include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that may be used to store desired program code in the form of instructions or data structures and that may be accessed by a computer. Also, any connection can be properly termed a computer-readable medium. Disk and disc, as used herein, includes compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk, and Blu-ray™ disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations also can be included within the scope of computer-readable media. Additionally, the operations of a method or algorithm may reside as one or any combination or set of codes and instructions on a machine readable medium and computer-readable medium, which may be incorporated into a computer program product. 
     Various modifications to the implementations described in this disclosure may be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other implementations without departing from the spirit or scope of this disclosure. Thus, the claims are not intended to be limited to the implementations shown herein but are to be accorded the widest scope consistent with this disclosure, the principles and the novel features disclosed herein. 
     Additionally, a person having ordinary skill in the art will readily appreciate, the terms “upper” and “lower” are sometimes used for ease of describing the Figures, and indicate relative positions corresponding to the orientation of the Figure on a properly oriented page and may not reflect the proper orientation of any device as implemented. 
     Certain features that are described in this specification in the context of separate implementations also can be implemented in combination in a single implementation. Conversely, various features that are described in the context of a single implementation also can be implemented in multiple implementations separately or in any suitable subcombination. Moreover, although features may be described as acting in certain combinations and even initially claimed as such, one or more features from a claimed combination can in some cases be excised from the combination, and the claimed combination may be directed to a subcombination or variation of a subcombination. 
     Similarly, while operations are depicted in the drawings in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed, to achieve desirable results. Further, the drawings may schematically depict one more example process in the form of a flow diagram. However, other operations that are not depicted can be incorporated in the example processes that are schematically illustrated. For example, one or more additional operations can be performed before, after, simultaneously, or between any of the illustrated operations. In certain circumstances, multitasking and parallel processing may be advantageous. Moreover, the separation of various system components in the implementations described should not be understood as requiring such separation in all implementations, and it should be understood that the described program components and systems can generally be integrated together in a single software product or packaged into multiple software products. Additionally, other implementations are within the scope of the following claims. In some cases, the actions recited in the claims can be performed in a different order and still achieve desirable results.