Patent Publication Number: US-2016249357-A1

Title: Soft access point master mode using dual wideband channels

Description:
BACKGROUND 
     1. Field of Disclosure 
     The following relates generally to wireless communication, for example soft access point (AP) master mode using dual wideband channels. 
     2. Description of Related Art 
     Wireless communications systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems may be multiple-access systems capable of supporting communication with multiple users by sharing the available system resources (e.g., time, frequency, and power). 
     A wireless network, for example a wireless local area network (WLAN) may include an AP that may communicate with one or more stations (STAs) or mobile devices. The AP may be coupled to a network, such as the Internet, and may enable a mobile device to communicate via the network (or communicate with other devices coupled to the access point in a service set, e.g., a basic service set (BSS) or extended service set (ESS)). A wireless device may communicate with a network device bi-directionally. For example, in a WLAN, a STA may communicate with an associated AP via downlink (DL) and UL. From the STA&#39;s perspective, the DL (or forward link) may refer to the communication link from the AP to the station, and the uplink (UL) (or reverse link) may refer to the communication link from the station to the AP. In some cases, a STA may provide connection services to other STAs as a soft AP. 
     A STA serving as a soft AP in master mode may be configured to communicate with another wireless communication device over two channels simultaneously. In some cases, one or both of the channels may be allocated for special purposes, such as radar applications. Accordingly, there may be instances in which both the STA and a radar application are using the same channel. An AP or a soft AP may vacate a channel upon detection of radar, but this may result in a suboptimal channel arrangement. That is, moving a primary channel from a radar subband may cause the primary channel to end up in a more congested frequency band than a secondary channel. 
     SUMMARY 
     Systems, methods, and apparatuses for soft AP master mode using dual wideband channels are described. A station (STA) serving as a soft access point (SAP) in master mode may be configured to support communication over two radar channels (e.g., a primary and secondary channel) simultaneously. The STA may detect radar on the primary channel and move the primary channel to the secondary channel; meanwhile, the secondary channel may be moved to a channel in a non-radar subband. In some cases, the STA may establish a primary channel in a non-radar subband and then advertise a single bandwidth capacity. the STA may then perform a channel availability check (CAC) on a radar subband. If the CAC is successful, the STA may establish a secondary channel on the radar subband (or move the primary channel to the radar subband) and advertise a dual bandwidth capacity. 
     A method of wireless communication is described. The method may include establishing a primary channel in a first radar subband and a secondary channel in a second radar subband, detecting a radar signal in the first radar subband, moving the secondary channel to a non-radar subband based at least in part on detecting the radar signal, and moving the primary channel to the second radar subband based at least in part on detecting the radar signal and moving the secondary channel. 
     An apparatus for wireless communication is described. The apparatus may include a channel establishment component for establishing a primary channel in a first radar subband and a secondary channel in a second radar subband, a radar detector for detecting a radar signal in the first radar subband, a secondary radio controller for moving the secondary channel to a non-radar subband based at least in part on detecting the radar signal, and a primary radio controller for moving the primary channel to the second radar subband based at least in part on detecting the radar signal and moving the secondary channel. 
     A further apparatus for wireless communication is described. The apparatus may include a processor, memory in electronic communication with the processor, and instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to establish a primary channel in a first radar subband and a secondary channel in a second radar subband, detect a radar signal in the first radar subband, move the secondary channel to a non-radar subband based at least in part on detecting the radar signal, and move the primary channel to the second radar subband based at least in part on detecting the radar signal and moving the secondary channel. 
     A non-transitory computer-readable medium storing code for wireless communication is described. The code may include instructions executable to establish a primary channel in a first radar subband and a secondary channel in a second radar subband, detect a radar signal in the first radar subband, move the secondary channel to a non-radar subband based at least in part on detecting the radar signal, and move the primary channel to the second radar subband based at least in part on detecting the radar signal and moving the secondary channel. 
     The method, apparatuses, or non-transitory computer-readable medium described herein may further include processes, features, means, or instructions for activating a soft AP feature, wherein establishing the primary and secondary channel is based at least in part on the soft AP feature. Additionally or alternatively, some examples may include processes, features, means, or instructions for advertising a dual bandwidth capacity based at least in part on the primary channel and the secondary channel. 
     The method, apparatuses, or non-transitory computer-readable medium described herein may further include processes, features, means, or instructions for performing a successful channel availability check (CAC) check on the first radar subband and the second radar subband, wherein establishing the primary and secondary channel is based at least in part on the successful CAC check. Additionally or alternatively, some examples may include processes, features, means, or instructions for performing a successful CAC check on a third radar subband based at least in part on moving the secondary channel to the non-radar subband, and moving the secondary channel to the third radar subband based at least in part on the successful CAC check on the third radar subband. 
     The method, apparatuses, or non-transitory computer-readable medium described herein may further include processes, features, means, or instructions for performing a successful CAC check on the first radar subband based at least in part on moving the primary channel to the second radar subband, and moving one of the primary channel or the secondary channel to the first radar subband based at least in part on the successful CAC check on the first radar subband. Additionally or alternatively, some examples may include processes, features, means, or instructions for performing the CAC check comprises using a first radio to communicate on one of the channels while concurrently performing the CAC check on the other of the channels. 
     A method of wireless communication is described. The method may include establishing a primary channel in a non-radar subband, advertising a single bandwidth capacity based at least in part on the primary channel, completing a successful CAC on a radar subband for a secondary channel after advertising the single bandwidth capacity, establishing the secondary channel in the radar subband based at least in part on the successful CAC, and advertising a dual bandwidth capacity based at least in part on the primary channel and the successful CAC. 
     An apparatus for wireless communication is described. The apparatus may include a channel establishment component for establishing a primary channel in a non-radar subband, an advertisement component for advertising a single bandwidth capacity based at least in part on the primary channel, a CAC component for completing a successful CAC on a radar subband for a secondary channel after advertising the single bandwidth capacity, a channel establishment component for establishing the secondary channel in the radar subband based at least in part on the successful CAC, and an advertisement component for advertising a dual bandwidth capacity based at least in part on the primary channel and the successful CAC. 
     An apparatus for wireless communication is described. The apparatus may include means for establishing a primary channel in a non-radar subband, means for advertising a single bandwidth capacity based at least in part on the primary channel, means for completing a successful CAC on a radar subband for a secondary channel after advertising the single bandwidth capacity means for establishing the secondary channel in the radar subband based at least in part on the successful CAC, and means for advertising a dual bandwidth capacity based at least in part on the primary channel and the successful CAC. 
     A non-transitory computer-readable medium storing code for wireless communication is described. The code may include instructions executable to establish a primary channel in a non-radar subband, advertise a single bandwidth capacity based at least in part on the primary channel, complete a successful CAC on a radar subband for a secondary channel after advertising the single bandwidth capacity, establish the secondary channel in the radar subband based at least in part on the successful CAC, and advertise a dual bandwidth capacity based at least in part on the primary channel and the successful CAC. 
     The method, apparatuses, or non-transitory computer-readable medium described herein may further include processes, features, means, or instructions for communicating over the primary channel using a first radio while concurrently performing the CAC on the radar subband using a second radio. Additionally or alternatively, in some examples the radar subband comprises a first radar subband, performing a second successful CAC on a second radar subband, and adding the second radar subband to a list available of radar subbands. 
     The method, apparatuses, or non-transitory computer-readable medium described herein may further include processes, features, means, or instructions for determining that the list contains a threshold number of subbands, and advertising the dual bandwidth capacity is based at least in part on the determination. Additionally or alternatively, some examples may include processes, features, means, or instructions for detecting a radar signal in the radar subband, and moving the secondary channel to the different subband based at least in part on detecting the radar signal in the radar subband. 
     The conception and specific examples disclosed may be readily utilized as a basis for modifying or designing other structures for carrying out the same purposes of the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims. Characteristics of the concepts disclosed herein, both their organization and method of operation, together with associated advantages will be better understood from the following description when considered in connection with the accompanying figures. Each of the figures is provided for the purpose of illustration and description only, and not as a definition of the limits of the claims. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       A further understanding of the nature and advantages of the present disclosure may be realized by reference to the following drawings. In the appended figures, similar components or features may have the same reference label. Further, various components of the same type may be distinguished by following the reference label by a dash and a second label that distinguishes among the similar components. If just the first reference label is used in the specification, the description is applicable to any one of the similar components having the same first reference label irrespective of the second reference label. 
         FIG. 1  illustrates a wireless local area network (WLAN)  100  (also known as a wireless fidelity (Wi-Fi) network) for soft access point (AP) master mode using dual wideband channels configured in accordance with various aspects of the present disclosure 
         FIG. 2  illustrates an example of a wireless communications subsystem that supports soft AP master mode using dual wideband channels in accordance with various aspects of the present disclosure; 
         FIG. 3  illustrates an example of a dynamic channel configuration that supports soft AP master mode using dual wideband channels in accordance with various aspects of the present disclosure; 
         FIG. 4A  illustrates an example of a process flow that supports soft AP master mode using dual wideband channels in accordance with various aspects of the present disclosure; 
         FIG. 4B  illustrates an example of a process flow that supports soft AP master mode using dual wideband channels in accordance with various aspects of the present disclosure; 
         FIG. 5  shows a block diagram of a wireless device that supports soft AP master mode using dual wideband channels in accordance with various aspects of the present disclosure; 
         FIG. 6  shows a block diagram of a wireless device that supports soft AP master mode using dual wideband channels in accordance with various aspects of the present disclosure; 
         FIG. 7  shows a block diagram of a wireless device that supports soft AP master mode using dual wideband channels in accordance with various aspects of the present disclosure; 
         FIG. 8  illustrates a block diagram of a system including a wireless device that supports soft AP master mode using dual wideband channels in accordance with various aspects of the present disclosure; 
         FIG. 9  illustrates a method for soft AP master mode using dual wideband channels in accordance with various aspects of the present disclosure; 
         FIG. 10  illustrates a method for soft AP master mode using dual wideband channels in accordance with various aspects of the present disclosure; 
         FIG. 11  illustrates a method for soft AP master mode using dual wideband channels in accordance with various aspects of the present disclosure; 
         FIG. 12  illustrates a method for soft AP master mode using dual wideband channels in accordance with various aspects of the present disclosure; 
         FIG. 13  illustrates a method for soft AP master mode using dual wideband channels in accordance with various aspects of the present disclosure; and 
         FIG. 14  illustrates a method for soft AP master mode using dual wideband channels in accordance with various aspects of the present disclosure. 
     
    
    
     DETAILED DESCRIPTION 
     The described features generally relate to improved systems, methods, or apparatuses for soft AP master mode using dual wideband channels. In some wireless communication systems a station (STA) serving as a soft access point (SAP) in master mode may have dual radios such that the STA may communicate over two different channels at the same time. The STA may access and communicate over channels reserved for radar applications (e.g., airport radar, weather radar, etc.). Accordingly, the STA may be configured to detect radar signals present in a channel (e.g., the device may support dynamic frequency selection (DFS) and change frequencies accordingly). Before communicating over the new channel, the STA may wait a period of time (e.g., 60 seconds) to determine if the new channel is currently supporting radar applications (i.e., the STA may perform a channel availability check (CAC)). If the CAC is successful, the STA may advertise communication abilities associated with the new channel. 
     A STA in master mode may start basic service set (BSS) with SAP functions via a primary channel in a non-radar subband (e.g., unlicensed national information infrastructure  1  (UNII 1 )). The STA may select a secondary channel in a radar subband (e.g., UNII 2 ) and commence CAC. After successful CAC, and if associated clients support dual bandwidth capacity, the STA may advertise the secondary channel. However, if associated clients do not support dual bandwidth capacity, the STA may refrain from advertising dual bandwidth capacity and instead continue to perform CACs on other radar subbands and use the results to generate a list of available channels. Once the list of available channels satisfies a threshold, the STA may advertise communication capacity and abilities associated with the secondary channel, regardless of the functionality of the associated clients. 
     The STA may establish BSS operation over primary and secondary channels that are both in a radar subband. In this instance, detection of a radar signal in the secondary channel may prompt the STA to switch the secondary channel to a non-radar channel to avoid interruption. Should the STA detect a radar signal in the primary channel, the STA may switch the primary channel to the secondary channel. In some cases, the STA may add a new secondary channel using any available non-radar subband. 
     The following description provides examples, and is not limiting of the scope, applicability, or examples set forth in the claims. Changes may be made in the function and arrangement of elements discussed without departing from the scope of the disclosure. Various examples may omit, substitute, or add various procedures or components as appropriate. For instance, the methods described may be performed in an order different from that described, and various steps may be added, omitted, or combined. Also, features described with respect to some examples may be combined in other examples. 
       FIG. 1  illustrates a WLAN  100  (also known as a Wi-Fi network) configured in accordance with various aspects of the present disclosure. The WLAN  100  may include an access point AP  105  and multiple station (STAs)  115 , which may represent devices such as mobile stations, personal digital assistant (PDAs), other handheld devices, netbooks, notebook computers, tablet computers, laptops, display devices (e.g., TVs, computer monitors, etc.), printers, etc. The AP  105  and associated STAs  115  may represent a basic service set (BSS) or an extended service set (ESS). The various STAs  115  in the network are able to communicate with one another through the AP  105 . Also shown is a coverage area  110  of the AP  105 , which may represent a basic service area (BSA) of the WLAN  100 . 
     A STA  115  may be configured to support communications between another STA  115  and an external network, such as a network  130  (e.g., the internet). For instance, a STA  115  may support a master mode that enables the STA  115  to serve as a soft AP (SAP); that is, the STA  115  may facilitate communications between a network  130  and STAs  115 . the STAs  115  associated with an SAP may form a BSS which may be different from a BSS associated with an AP  105 . For instance, some STAs  115  may be outside of coverage area  110  such that they are unable to access the network  130  via AP  105  or a direct connection. In such an instance, a STA  115  in master mode may create a network associated with a specified name and channels to provide network services (e.g., connecting an associated STA  115  to an external network  130 ). A STA  115  may be associated with a master mode STA  115  (i.e., be in managed mode or client mode) upon switching channels to match the master mode channel and providing acceptable credentials to the master mode STA  115 . 
     The STA  115  serving as an SAP in master mode may communicate with a client STA  115  using a dual radio configuration. The use of two radios may enable the master mode STA  115  to exchange control and data over the air using two channels (e.g., the STA  115  may engage in 802.11ac 80+80 communications in which an 80 MHz band is used in conjunction with another 80 MHz band). The two channels may be called the primary and secondary channels and may convey information, such as control and data. In some cases, the primary channel may carry more control information than the secondary channel; accordingly, in some cases the primary channel may have a higher connection priority than the secondary channel. 
     The communication channels used by the STAs  115  may be within subbands allocated for radar applications, such as airport traffic control and weather services. Accordingly, channel conflict may arise when both the STAs  115  and a radar application attempt to facilitate communications using the same channel. In some cases, the radar application may be given priority over the STAs  115  (e.g., the radar application may continue to use the channel and the STAs  115  may drop the channel). In such cases, the master mode STA  115  may select a different channel on which to continue communications. 
     A master mode STA  115  may select a channel in a radar subband, or in a non-radar subband. If the new channel is in a radar subband, the STA  115  may perform a channel availability check (CAC) by listening for radar signals on the new channel for a period of time (e.g., 60 seconds). If the STA  115  detects a radar signal during the CAC, the CAC is said to have failed and the STA  115  may change channel frequencies again. If the STA  115  does not detect a radar signal, the CAC is said to have succeeded and the STA  115  may resume communications using the channel. 
     A master mode STA  115  may advertise the communication abilities associated with the BSS channels. For instance, upon establishment of a primary channel the STA  115  may advertise single bandwidth capacity. The STA  115  may begin communications over the primary channel while performing a CAC on a channel in a radar subband. Once the STA  115  has completed a successful CAC on the radar-subband channel, the STA  115  may establish the radar-subband channel as the secondary channel and commence secondary channel communications. Thus, the STA  115  may advertise dual bandwidth capacity based on the secondary channel. 
     The STAs  115  associated with the master mode STA  115  may not support dual bandwidth communications. In these instances, the master mode STA  115  may recognize or detect the capabilities of the associated STAs  115  and adjust communications accordingly. For example, the STA  115  in master mode may decide to perform CACs on a number of channels based on the capabilities of the associated STAs. The master mode STA  115  may generate a list of channels associated with successful CACs; thus, the STA  115  may refer to the available channel list to determine channel selections in the future. 
     Although not shown in  FIG. 1 , a STA  115  may be located in the intersection of more than one coverage area  110  and may associate with more than one AP  105 . A single AP  105  and an associated set of STAs  115  may be referred to as a BSS. An ESS is a set of connected BSSs. A distribution system (DS) (not shown) may be used to connect APs in an ESS. In some cases, the coverage area  110  of an AP  105  may be divided into sectors (also not shown). The WLAN  100  may include APs  105  of different types (e.g., metropolitan area, home network, etc.), with varying and overlapping coverage areas  110 . Two STAs  115  may also communicate directly via a direct wireless link  125  regardless of whether both STAs  115  are in the same coverage area  110 . Examples of direct wireless links  120  may include Wi-Fi Direct connections, Wi-Fi Tunneled Direct Link Setup (TDLS) links, and other group connections. STAs  115  and APs may communicate according to the WLAN radio and baseband protocol for physical (PHY) and medium access control (MAC) layers from IEEE 802.11 and versions including, but not limited to, 802.11b, 802.11g, 802.11a, 802.11n, 802.11ac, 802.11ad, 802.11ah, etc. In other implementations, peer-to-peer connections or ad hoc networks may be implemented within WLAN  100 . 
     Thus, a STA  115  may serve as a soft access point (SAP) in master mode and communicate with another STA  115  over two channels (e.g., a primary and secondary channel) simultaneously. The STA  115  in master mode may switch a communication channel based on the detection of a radar signal in the communication channel. In some cases, the master mode STA  115  may move the primary channel to the secondary channel and move the secondary channel to a new channel. The new channel may be based on a list of available channels associated with successful CACs. 
       FIG. 2  illustrates an example of a wireless communications subsystem  200  for soft AP master mode using dual wideband channels in accordance with various aspects of the present disclosure. Wireless communications subsystem  200  may include a STA  115   a,  which may configured to serve as an SAP such as described herein with reference to  FIG. 1 . Wireless communications subsystem  200  may also include STA  115 - b,  and STA  115 - c,  which may be examples of STAs  115  also described herein with reference to  FIG. 1 . STA  115 - a  may provide connection services for the STAs  115  in a BSS. Wireless communication subsystem may also feature a radar  205 , which may use frequencies within radar subbands, such as unlicensed national information infrastructure (UNII) channels (e.g., UNII 2 , UNII 3 , etc.) designated for radar applications. In some cases, radar  205  may have priority over STA  115 - a  for use of the frequency bandwidth radar  205  uses for operation. 
     STA  115 - a  may serve as a virtual connection between a network (not shown) and STAs  115 . The STAs  115  may be within or outside of a coverage area  110 - a  associated with an AP (not shown) For instance, STA  115 - a  may be in master mode such that STA  115 - b  may connect to an external network, such as the Internet. In some cases, STA  115 - b  and STA  115 - a  may support dual bandwidth communications; that is, STA  115 - b  and STA  115 - a  may exchange information over two channels. Dual bandwidth communication may involve the use of multiple radios, or a single radio with multiple components for different frequency bands. Other STAs  115  may not be dual bandwidth capable. For example, STA  115 - a  may communicate with STA  115 - c  over a single channel. If one or both communication of STA  115 - a′ s channels are in a radar subband, there may be times when a radar  205  attempts to use the channel simultaneously with STA  115 - b  and STA  115 - a.  In such instances, STA  115 - a  may detect a radar signal from the radar  205  and switch to a different channel based on the detection. 
     In one example, STA  115 - a  may establish BSS functions via a primary channel and a secondary channel, each of which is within a radar subband. STA  115 - a  may perform a CAC for both channels before commencing communications. However, at some point STA  115 - a  may detect a radar signal from the radar  205  over the primary channel. Upon detection of the radar signal, STA  115 - a  may move the primary channel to the secondary channel. Accordingly, the SAP  105 - a  may move the secondary channel to a new channel, which may be in a radar or non-radar subband. In some cases, STA  115 - a  may detect a radar signal on the secondary channel. In such an instance, STA  115 - a  may switch the secondary channel to a new frequency while maintaining the same primary channel. 
     In another example, STA  115 - a  may establish BSS operation over a primary channel in a non-radar subband and a secondary channel in a radar subband. Upon selection of the secondary channel, STA  115 - a  may execute a CAC to determine if there are any signals associated with a radar application. If the CAC is successful (i.e., the channel is clear of radar signals), STA  115 - a  may advertise dual bandwidth communication capacity associated with the secondary channel. In some cases, STA  115 - a  may continue performing CACs for other radar channels. Accordingly, STA  115 - a  may build a list of available channels associated with successful CACs for future use. For example, when STA  115 - a  detects a radar signal on a channel and decides to switch to a new channel, STA  115 - a  may select the new channel based on the list of available radar subbands. 
     Thus, a master mode STA  115  may communicate with another STA  115  using two channels (e.g., a primary and secondary channel) simultaneously. The radar channels may be in radar or non-radar subbands. If the master mode STA  115  detects a radar blast on the primary channel, the STA  115  may move the primary channel to the secondary channel. In order to continue supporting dual bandwidth communications, the STA  115  may switch the secondary channel to a channel in a non-radar subband. However, in some cases the STA may choose the move the secondary channel to a radar channel. If the STA  115  detects a radar signal on the secondary channel, the STA  115  may move the secondary channel to a different frequency based on the detection. In some cases the STA  115  may determine if associated clients are capable of supporting dual bandwidth communications and adjust communications accordingly. Even after establishing two communication channels (radar or non-radar), the master mode STA  115  may continue to perform a channel availability check (CAC) on other channels to determine if the channels currently are occupied by radar signals. The STA  115  keep track of the channels associated with successful CACs in a table. 
       FIG. 3  illustrates an example of a dynamic channel configuration  300  for soft AP master mode using dual wideband channels in accordance with various aspects of the present disclosure. Dynamic channel configuration  300  may include a first channel  305 , a second channel  310 , and a third channel  315 , each of which may be associated with SAP  105  communications, such as described with reference to  FIGS. 1-2 . First channel  305 , second channel  310 , and third channel  315  may be frequencies within radar or non-radar subbands. First channel  305 , second channel  310 , and third channel  315  may be associated with a STA  115  which is capable of supporting master mode such that the STA  115  may serve as an SAP for other STAs  115 . Dynamic channel configuration  300  may also be used by an AP  105  as described with reference to  FIG. 1 . 
     Thus, a STA  115  in master mode may select first channel  305  to be associated with the primary channel of a BSS (e.g., the STA  115  may convey primary channel communications  320  over first channel  305 ). The STA  115  may also select second channel  310  to be associated with the secondary channel of a BSS (e.g., the STA  115  may convey secondary communications  325  over second channel  310 ). The STA  115  may identify third channel  315  as an available channel for communications. In some examples, third channel  315  may be associated with an available channel list such as described with reference to  FIG. 2 . Thus, during time period  335  the primary channel is first channel  305 , the secondary channel is  310 , and third channel  315  is unassociated with BSS communications. 
     The STA  115  may detect a radar signal on first channel  305 , thus rendering first channel  305  unavailable for primary channel communications  320 . Accordingly, the STA  115  may switch primary channel communications  320  to second channel  310 , thereby freeing up first channel  305  for radar applications (i.e., second channel  310  may become the primary channel for the BSS). 
     The STA  115  may refrain from performing a CAC for second channel  310  due to the association of the second channel with secondary channel communications  325  (i.e., second channel  310  may be associated with a successful CAC that was performed when the STA  115  initially selected second channel to convey secondary channel communications  325 ). Accordingly, the STA  115  may avoid interruption or delay in communications by skipping CAC and immediately commencing primary channel communications  320 . 
     Moving primary channel communications  320  to second channel  310  may render second channel  310  unavailable for secondary channel communications  325 . Thus, the STA  115  may select a new channel to convey secondary channel communications  325 . For example, the STA  115 may choose third channel  315  to be associated with secondary channel communications  325  (i.e., third channel  315  may become the secondary channel for the BSS). Thus, during time period  340  first channel  305  may convey radar communications, second channel  310  may be the primary channel of the BSS, and third channel  315  may be the secondary channel of the BSS. 
       FIG. 4A  illustrates an example of a process flow  401  for soft AP master mode using dual wideband channels in accordance with various aspects of the present disclosure. Process flow  401  may also include a STA  115 - f,  which may be an example of a STA  115  described herein with reference to  FIGS. 1-2 . Process flow  401  may include a STA  115 - e,  which may be an example of a STA  115  described herein with reference to  FIGS. 1-2 ; that is, STA  115 - e  may support a master mode and serve as an SAP for STA  115 - f.  Radar  205 - a  may also be included in process flow  401 . 
     At  405 , STA  115 - e  may perform a successful channel availability check (CAC) on the first radar subband and the second radar subband. In some instances establishing the primary and secondary channel may be based at least in part on the successful CAC. STA  115 - e  may also activate a soft AP feature. 
     At  410 , STA  115 - e  may establish a primary channel in a first radar subband and at  415  STA  115 - e  may establish a secondary channel in a second radar subband. Establishing the primary and secondary channel may be based at least in part on the soft AP operation. In some cases the STA  115 - e  may advertise a dual bandwidth capacity based at least in part on the primary channel and the secondary channel. At  420 , STA  115 - e  may identify a third radar or non-radar subband available for communications. 
     At  425 , STA  115 - e  may detect a radar signal in the first radar subband. Accordingly, at  430 , STA  115 - e  may move the secondary channel to a non-radar subband. The movement of the secondary channel may be based at least in part on detecting the radar signal. STA  115 - e  may also move the primary channel to the second radar subband. The movement of the primary channel may be based at least in part on detecting the radar signal. 
     In some cases, STA  115 - e  may perform a successful CAC on the third radar subband based at least in part on moving the secondary channel to the non-radar subband. STA  115 - e  may move the secondary channel to the third radar subband based at least in part on the successful CAC on the third radar subband. 
     In some cases STA  115 - e  may perform a subsequent CAC on the first radar subband based at least in part on moving the primary channel to the second radar subband. STA  115 - e  may move one of the primary channel or the secondary channel to the first radar subband based at least in part on the successful CAC on the first radar subband. In some cases, performing a CAC may include using a first radio to communicate on one of the channels while concurrently performing the CAC on the other of the channels. 
       FIG. 4B  illustrates an example of a process flow  402  for soft AP master mode using dual wideband channels in accordance with various aspects of the present disclosure. Process flow  402  may also include a STA  115 - h,  which may be an example of a STA  115  described herein with reference to  FIGS. 1-2 . Process flow  402  may include a STA  115 - g,  which may be an example of a STA  115  described herein with reference to  FIGS. 1-2 ; that is, STA  115 - g  may support a master mode and serve as an SAP for STA  115 - h.    
     At  435 , STA  115 - g  may establish a primary channel in a non-radar subband. At  440 , STA  115   g  may advertise a single bandwidth capacity based at least in part on the primary channel. 
     At  445 , STA  115   g  may complete a successful CAC on a radar subband for a secondary channel. The CAC may be performed after advertising the single bandwidth capacity. At  450 , STA  115   g  may establish the secondary channel in the radar subband based at least in part on the successful CAC. Thus, at  455 , STA  115   g  may advertise a dual bandwidth capacity based at least in part on the primary channel and the successful CAC. 
     In some cases STA  115   g  may communicate over the primary channel using a first radio while concurrently performing the CAC on the radar subband using a second radio. 
     STA  115   g  may also perform a second successful CAC on a second radar subband. In some cases, STA  115   g  may maintain a list of available subbands (e.g., subbands associated with successful CACs). Thus, STA  115   g  may update the list of available subbands by adding the second radar subband. In some examples, STA  115   g  may determine that the list contains a threshold number of subbands. Thus, in some cases advertising the dual bandwidth capacity may be based on the determination. 
     In some cases, STA  115   g  may detect a radar signal in the radar subband. Accordingly, STA  115   g  may move the secondary channel to the different subband. The movement of the secondary channel may be based at least in part on detecting the radar signal in the radar subband. 
       FIG. 5  shows a block diagram of a wireless device  500  configured for soft AP master mode using dual wideband channels in accordance with various aspects of the present disclosure. Wireless device  500  may be an example of aspects of a STA  115  described with reference to  FIGS. 1-4 . Wireless device  500  may include a receiver  505 , a dual radio controller  510 , or a transmitter  515 . Wireless device  500  may also include a processor. Each of these components may be in communication with each other. 
     The receiver  505  may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to soft AP master mode using dual wideband channels, etc.). Information may be passed on to the dual radio controller  510 , and to other components of wireless device  500 . 
     The dual radio controller  510  may establish a primary channel in a first radar subband and a secondary channel in a second radar subband, detect a radar signal in the first radar subband, move the secondary channel to a non-radar subband based at least in part on detecting the radar signal, and move the primary channel to the second radar subband based at least in part on detecting the radar signal and moving the secondary channel. 
     The transmitter  515  may transmit signals received from other components of wireless device  500 . In some examples, the transmitter  515  may be collocated with the receiver  505  in a transceiver module. The transmitter  515  may include a single antenna, or it may include a plurality of antennas. 
       FIG. 6  shows a block diagram of a wireless device  600  for soft AP master mode using dual wideband channels in accordance with various aspects of the present disclosure. Wireless device  600  may be an example of aspects of a wireless device  500  or a STA  115  described with reference to  FIGS. 1-5 . Wireless device  600  may include a receiver  505   a,  a dual radio controller  510   a,  or a transmitter  515   a.  Wireless device  600  may also include a processor. Each of these components may be in communication with each other. The dual radio controller  510   a  may also include a channel establishment manager  605 , a radar detector  610 , a secondary radio controller  615 , and a primary radio controller  620 . 
     The receiver  505   a  may receive information which may be passed on to dual radio controller  510   a,  and to other components of the wireless device  600 . The dual radio controller  510   a  may perform the operations described herein with reference to  FIG. 5 . The transmitter  515   a  may transmit signals received from other components of wireless device  600 . 
     The channel establishment manager  605  may establish a primary channel in a first radar subband and a secondary channel in a second radar subband as described herein with reference to  FIGS. 2-4 . The channel establishment manager  605  may also establish a primary channel in a non-radar subband. The channel establishment manager  605  may establish the secondary channel in the radar subband based at least in part on the successful CAC. 
     The radar detector  610  may detect a radar signal in a radar subband as described herein with reference to  FIGS. 2-4 . 
     The secondary radio controller  615  may move the secondary channel to a non-radar subband based at least in part on detecting the radar signal as described herein with reference to  FIGS. 2-4 . The secondary radio controller  615  may also move the secondary channel to a third radar subband based at least in part on the successful CAC on the third radar subband. The secondary radio controller  615  may also move the secondary channel to the different subband based at least in part on detecting the radar signal in the radar subband. 
     The primary radio controller  620  may move the primary channel to the second radar subband based at least in part on detecting the radar signal and moving the secondary channel as described herein with reference to  FIGS. 2-4 . The primary radio controller  620  may also communicate over the primary channel using a first radio while concurrently performing the CAC on the radar subband using a second radio. 
       FIG. 7  shows a diagram of a system  700  including STA  115   i  configured for soft AP master mode using dual wideband channels in accordance with various aspects of the present disclosure. STA  115   i  may be an example of a wireless device  500 , a wireless device  600 , or a STA  115  described herein with reference to  FIGS. 1, 2 and 5-7 . STA  115   i  may include a dual radio controller  510   b,  which may be an example of a dual radio controller described with reference to  FIGS. 5-6 . STA  115   i  may also include components for bi-directional voice and data communications including components for transmitting communications and components for receiving communications. For example, STA  115   i  may communicate bi-directionally with an AP  105  (not shown) or a STA  115  (e.g., STA  115   j  and STA  115   k ). STA  115   i  may communicate with an external network  130   a  through network communications manager  745 . In some cases, STA  115   i  facilitate communications between the network  130   a  and STAs  115  such as described with reference to  FIGS. 1-4 . 
     The dual radio controller  510   b  may include a channel establishment manager  605   a,  a radar detector  610   a,  a secondary radio controller  615   a,  and a primary radio controller  620   a.  Each of these modules may perform the functions described herein with reference to  FIG. 6 . The dual radio controller  510   b  may also include a soft AP master controller  705 , an advertisement manager  710 , a CAC manager  715 , and a radar subband list manager  725 . 
     The soft AP master controller  705  may activate a soft AP feature. In some cases, establishing a primary and secondary channel may be based at least in part on the soft AP feature as described herein with reference to  FIGS. 2-4 . 
     The advertisement manager  710  may advertise a dual bandwidth capacity based at least in part on a primary channel and a secondary channel as described herein with reference to  FIGS. 2-4 . The advertisement manager  710  may also advertise a single bandwidth capacity based at least in part on the primary channel. The advertisement manager  710  may also advertise a dual bandwidth capacity based at least in part on the primary channel and the successful CAC. The advertisement manager  710  may also advertise the dual bandwidth capacity is based at least in part on the determination. 
     The CAC manager  715  may perform a successful channel availability check (CAC) on a first radar subband and the second radar subband, wherein establishing the primary and secondary channel is based at least in part on the successful CAC as described herein with reference to  FIGS. 2-4 . The CAC manager  715  may also perform a successful CAC on a third radar subband based at least in part on moving the secondary channel to the non-radar subband. The CAC manager  715  may perform the CAC on the first radar subband based at least in part on moving the primary channel to the second radar subband. In some cases, performing the CAC comprises using a first radio to communicate on one of the channels while concurrently performing the CAC on the other of the channels. The CAC manager  715  may complete the CAC on a radar subband for a secondary channel after advertising the single bandwidth capacity. 
     The dual radio controller  720  may move one of the primary channel or the secondary channel to the first radar subband based at least in part on the successful CAC on the first radar subband as described herein with reference to  FIGS. 2-4 . 
     The radar subband list manager  725  may add a radar subband to a list of available radar subbands as described herein with reference to  FIGS. 2-4 . The radar subband list manager  725  may also determine that the list contains a threshold number of subbands. 
     STA  115   i  may also include a processor  730 , and memory  735  (including software (SW)  740 ), a transceiver  755 , and antenna(s)  760 , each of which may communicate, directly or indirectly, with one another (e.g., via buses  750 ). The transceiver  755  may communicate bi-directionally, via the antenna(s)  760  or wired or wireless links, with networks, as described above. For example, the transceiver  755  may communicate bi-directionally with an AP  105  or another STA  115 . The transceiver  755  may include a modem to modulate the packets and provide the modulated packets to the antenna(s)  760  for transmission, and to demodulate packets received from the antenna(s)  760 . While STA  115   i  may include a single antenna  760 , STA  115   i  may also have multiple antennas  760  capable of concurrently transmitting or receiving multiple wireless transmissions. For example, antennas  760  may be associated with dual radios such that STA  115   i  may communicate over two channels at the same time. 
     The memory  735  may include random access memory (RAM) and read only memory (ROM). The memory  735  may store computer-readable, computer-executable software/firmware code  740  including instructions that, when executed, cause the processor  730  to perform various functions described herein (e.g., soft AP master mode using dual wideband channels, etc.). Alternatively, the software/firmware code  740  may not be directly executable by the processor  730  but cause a computer (e.g., when compiled and executed) to perform functions described herein. The processor  730  may include an intelligent hardware device (e.g., a central processing unit (CPU), a microcontroller, an ASIC, etc.). 
     The components of wireless device  500 , wireless device  600 , or dual radio controller  510  may, individually or collectively, be implemented with at least one ASIC adapted to perform some or all of the applicable functions in hardware. Alternatively, the functions may be performed by other processing units (or cores), on at least one IC. In other examples, other types of integrated circuits may be used (e.g., Structured/Platform ASICs, an FPGA, or another semi-custom IC), which may be programmed in any manner known in the art. The functions of each unit may also be implemented, in whole or in part, with instructions embodied in a memory, formatted to be executed by general or application-specific processors. 
       FIG. 8  shows a diagram of a system  800  including STA  115 - l  configured for soft AP master mode using dual wideband channels in accordance with various aspects of the present disclosure. STA  115 - l  may be an example of a wireless device  500 , a wireless device  600 , or a STA  115  described herein with reference to  FIGS. 1, 2, and 4-7 . STA  115 - l  may include a processor  730   a,  memory  735   a,  transceiver  755   a,  and antenna(s)  760   a,  each of which may perform the functions described above with reference to  FIG. 7 , and each of which may communicate, directly or indirectly, with one another (e.g., via bus system  750   a ). 
     In the present example, the memory  735   a  may include software that performs the functionality of dual radio controller  510   c.  For example, memory  735   a  may include software that, when compiled and executed, performs the functionality of a channel establishment manager  605   b,  radar detector  610   b,  secondary radio controller  615   b,  primary radio controller  620   b,  soft AP master controller  705   a,  advertisement manager  710   a,  CAC manager  715   a,  and radar subband list manager  725   a,  such as described with reference to  FIGS. 5-7 . In some cases, a subset of the functionality of dual radio controller  510   c  is included in memory  735   a;  in other cases, all of the functionality may be implemented as software executed by the processor  730   a  to cause STA  115 - l  to perform the functions of dual radio controller  510   c.  For example, the functionality of the channel establishment manager  605   b  and radar detector  610   d  may be accomplished by software included memory  735   a,  while the functionality of secondary radio controller  615   b,  primary radio controller  620   b,  soft AP master controller  705   a,  advertisement manager  710   a,  CAC manager  715   a,  and radar subband list manager  725   a  may be accomplished using hardware. Regardless of the distribution of functionality, STA  115 - l  may implement the functions described herein to serve as an SAP for STA  115   m  or STA  115   n.    
       FIG. 9  shows a flowchart illustrating a method  900  for soft AP master mode using dual wideband channels in accordance with various aspects of the present disclosure. The operations of method  900  may be implemented by a STA  115  or its components as described with reference to  FIGS. 1-8 . For example, the operations of method  900  may be performed by the dual radio controller  510  as described with reference to  FIGS. 5-8 . In some examples, an AP  105  may execute a set of codes to control the functional elements of the STA  115  to perform the functions described below. Additionally or alternatively, the STA  115  may perform aspects the functions described below using special-purpose hardware. 
     At block  905 , the STA  115  may establish a primary channel in a first radar subband and a secondary channel in a second radar subband as described herein with reference to  FIGS. 2-4 . In certain examples, the operations of block  905  may be performed by the channel establishment manager  605  as described herein with reference to  FIG. 6 . 
     At block  910 , the STA  115  may detect a radar signal in the first radar subband as described herein with reference to  FIGS. 2-4 . In certain examples, the operations of block  910  may be performed by the radar detector  610  as described herein with reference to  FIG. 6 . 
     At block  915 , the STA  115  may move the secondary channel to a non-radar subband based at least in part on detecting the radar signal as described herein with reference to  FIGS. 2-4 . In certain examples, the operations of block  915  may be performed by the secondary radio controller  615  as described herein with reference to  FIG. 6 . 
     At block  920 , the STA  115  may move the primary channel to the second radar subband based at least in part on detecting the radar signal and moving the secondary channel as described herein with reference to  FIGS. 2-4 . In certain examples, the operations of block  920  may be performed by the primary radio controller  620  as described herein with reference to  FIG. 6 . 
       FIG. 10  shows a flowchart illustrating a method  1000  for soft AP master mode using dual wideband channels in accordance with various aspects of the present disclosure. The operations of method  1000  may be implemented by a STA  115  or its components as described with reference to  FIGS. 1-8 . For example, the operations of method  1000  may be performed by the dual radio controller  510  as described with reference to  FIGS. 5-8 . In some examples, a STA  115  may execute a set of codes to control the functional elements of the 
     STA  115  to perform the functions described below. Additionally or alternatively, the STA  115  may perform aspects the functions described below using special-purpose hardware. The method  1000  may also incorporate aspects of method  900  of  FIG. 9 . 
     At block  1005 , the STA  115  may establish a primary channel in a first radar subband and a secondary channel in a second radar subband as described herein with reference to  FIGS. 2-4 . In certain examples, the operations of block  1005  may be performed by the channel establishment manager  605  as described herein with reference to  FIG. 6 . 
     At block  1010 , the STA  115  may detect a radar signal in the first radar subband as described herein with reference to  FIGS. 2-4 . In certain examples, the operations of block  1010  may be performed by the radar detector  610  as described herein with reference to FIG. 
       6 . 
     At block  1015 , the STA  115  may move the secondary channel to a non-radar subband based at least in part on detecting the radar signal as described herein with reference to  FIGS. 2-4 . In certain examples, the operations of block  1015  may be performed by the secondary radio controller  615  as described herein with reference to  FIG. 6 . 
     At block  1020 , the STA  115  may move the primary channel to the second radar subband based at least in part on detecting the radar signal and moving the secondary channel as described herein with reference to  FIGS. 2-4 . In certain examples, the operations of block  1020  may be performed by the primary radio controller  620  as described herein with reference to  FIG. 6 . 
     At block  1025 , the STA  115  may advertise a dual bandwidth capacity based at least in part on the primary channel and the secondary channel as described herein with reference to  FIGS. 2-4 . In certain examples, the operations of block  1025  may be performed by the advertisement manager  710  as described herein with reference to  FIG. 7 . 
       FIG. 11  shows a flowchart illustrating a method  1100  for soft AP master mode using dual wideband channels in accordance with various aspects of the present disclosure. The operations of method  1100  may be implemented by a STA  115  or its components as described with reference to  FIGS. 1-8 . For example, the operations of method  1100  may be performed by the dual radio controller  510  as described with reference to  FIGS. 5-8 . In some examples, an AP  105  may execute a set of codes to control the functional elements of the STA  115  to perform the functions described below. Additionally or alternatively, the STA  115  may perform aspects the functions described below using special-purpose hardware. The method  1100  may also incorporate aspects of methods  900 , and  1000  of  FIGS. 9-10 . 
     At block  1105 , the STA  115  may perform a successful channel availability check (CAC) on the first radar subband and the second radar subband, wherein establishing the primary and secondary channel is based at least in part on the successful CAC as described herein with reference to  FIGS. 2-4 . In certain examples, the operations of block  1105  may be performed by the CAC manager  715  as described herein with reference to  FIG. 7 . 
     At block  1110 , the STA  115  may establish a primary channel in a first radar subband and a secondary channel in a second radar subband as described herein with reference to  FIGS. 2-4 . In certain examples, the operations of block  1110  may be performed by the channel establishment manager  605  as described herein with reference to  FIG. 6 . 
     At block  1115 , the STA  115  may detect a radar signal in the first radar subband as described herein with reference to  FIGS. 2-4 . In certain examples, the operations of block  1115  may be performed by the radar detector  610  as described herein with reference to  FIG. 6 . 
     At block  1120 , the STA  115  may move the secondary channel to a non-radar subband based at least in part on detecting the radar signal as described herein with reference to  FIGS. 2-4 . In certain examples, the operations of block  1120  may be performed by the secondary radio controller  615  as described herein with reference to  FIG. 6 . 
     At block  1125 , the STA  115  may move the primary channel to the second radar subband based at least in part on detecting the radar signal and moving the secondary channel as described herein with reference to  FIGS. 2-4 . In certain examples, the operations of block  1125  may be performed by the primary radio controller  620  as described herein with reference to  FIG. 6 . 
       FIG. 12  shows a flowchart illustrating a method  1200  for soft AP master mode using dual wideband channels in accordance with various aspects of the present disclosure. The operations of method  1200  may be implemented by a STA  115  or its components as described with reference to  FIGS. 1-8 . For example, the operations of method  1200  may be performed by the dual radio controller  510  as described with reference to  FIGS. 5-8 . In some examples, a STA  115  may execute a set of codes to control the functional elements of the STA  115  to perform the functions described below. Additionally or alternatively, the AP  105  may perform aspects the functions described below using special-purpose hardware. The method  1200  may also incorporate aspects of methods  900 ,  1000 , and  1100  of  FIGS. 9-11 . 
     At block  1205 , the STA  115  may establish a primary channel in a non-radar subband as described herein with reference to  FIGS. 2-4 . In certain examples, the operations of block  1205  may be performed by the channel establishment manager  605  as described herein with reference to  FIG. 6 . 
     At block  1210 , the STA  115  may advertise a single bandwidth capacity based at least in part on the primary channel as described herein with reference to  FIGS. 2-4 . In certain examples, the operations of block  1210  may be performed by the advertisement manager  710  as described herein with reference to  FIG. 7 . 
     At block  1215 , the STA  115  may complete a successful CAC on a radar subband for a secondary channel after advertising the single bandwidth capacity as described herein with reference to  FIGS. 2-4 . In certain examples, the operations of block  1215  may be performed by the CAC manager  715  as described herein with reference to  FIG. 7 . 
     At block  1220 , the STA  115  may establish the secondary channel in the radar subband based at least in part on the successful CAC as described herein with reference to  FIGS. 2-4 . In certain examples, the operations of block  1220  may be performed by the channel establishment manager  605  as described herein with reference to  FIG. 6 . 
     At block  1225 , the STA  115  may advertise a dual bandwidth capacity based at least in part on the primary channel and the successful CAC as described herein with reference to  FIGS. 2-4 . In certain examples, the operations of block  1225  may be performed by the advertisement manager  710  as described herein with reference to  FIG. 7 . 
       FIG. 13  shows a flowchart illustrating a method  1300  for soft AP master mode using dual wideband channels in accordance with various aspects of the present disclosure. The operations of method  1300  may be implemented by a STA  115  or its components as described with reference to  FIGS. 1-8 . For example, the operations of method  1300  may be performed by the dual radio controller  510  as described with reference to  FIGS. 5-8 . In some examples, an AP  105  may execute a set of codes to control the functional elements of the STA  115  to perform the functions described below. Additionally or alternatively, the STA  115  may perform aspects the functions described below using special-purpose hardware. The method  1300  may also incorporate aspects of methods  900 ,  1000 ,  1100 , and  1200  of  FIGS. 9-12 . 
     At block  1305 , the STA  115  may establish a primary channel in a non-radar subband as described herein with reference to  FIGS. 2-4 . In certain examples, the operations of block  1305  may be performed by the channel establishment manager  605  as described herein with reference to  FIG. 6 . 
     At block  1310 , the STA  115  may advertise a single bandwidth capacity based at least in part on the primary channel as described herein with reference to  FIGS. 2-4 . In certain examples, the operations of block  1310  may be performed by the advertisement manager  710  as described herein with reference to  FIG. 7 . 
     At block  1315 , the STA  115  may complete a successful CAC on a first radar subband for a secondary channel after advertising the single bandwidth capacity as described herein with reference to  FIGS. 2-4 . In certain examples, the operations of block  1315  may be performed by the CAC manager  715  as described herein with reference to  FIG. 7 . 
     At block  1320 , the STA  115  may establish the secondary channel in the first radar subband based at least in part on the successful CAC as described herein with reference to  FIGS. 2-4 . In certain examples, the operations of block  1320  may be performed by the channel establishment manager  605  as described herein with reference to  FIG. 6 . 
     At block  1325 , the STA  115  may advertise a dual bandwidth capacity based at least in part on the primary channel and the successful CAC as described herein with reference to  FIGS. 2-4 . In certain examples, the operations of block  1325  may be performed by the advertisement manager  710  as described herein with reference to  FIG. 7 . 
     At block  1330 , the STA  115  may perform a second successful CAC on a second radar subband as described herein with reference to  FIGS. 2-4 . In certain examples, the operations of block  1330  may be performed by the CAC manager  715  as described herein with reference to  FIG. 7 . 
     At block  1335 , the STA  115  may add the second radar subband to a list of available radar subbands as described herein with reference to  FIGS. 2-4 . In certain examples, the operations of block  1335  may be performed by the radar subband list manager  725  as described herein with reference to  FIG. 7 . 
       FIG. 14  shows a flowchart illustrating a method  1400  for soft AP master mode using dual wideband channels in accordance with various aspects of the present disclosure. The operations of method  1400  may be implemented by a STA  115  or its components as described with reference to  FIGS. 1-8 . For example, the operations of method  1400  may be performed by the dual radio controller  510  as described with reference to  FIGS. 5-8 . In some examples, a STA  115  may execute a set of codes to control the functional elements of the STA  115  to perform the functions described below. Additionally or alternatively, the STA  115  may perform aspects the functions described below using special-purpose hardware. The method  1400  may also incorporate aspects of methods  900 ,  1000 ,  1100 ,  1200 , and  1300  of  FIGS. 9-13 . 
     At block  1405 , the STA  115  may establish a primary channel in a non-radar subband as described herein with reference to  FIGS. 2-4 . In certain examples, the operations of block  1405  may be performed by the channel establishment manager  605  as described herein with reference to  FIG. 6 . 
     At block  1410 , the STA  115  may advertise a single bandwidth capacity based at least in part on the primary channel as described herein with reference to  FIGS. 2-4 . In certain examples, the operations of block  1410  may be performed by the advertisement manager  710  as described herein with reference to  FIG. 7 . 
     At block  1415 , the STA  115  may complete a successful CAC on a first radar subband for a secondary channel after advertising the single bandwidth capacity as described herein with reference to  FIGS. 2-4 . In certain examples, the operations of block  1415  may be performed by the CAC manager  715  as described herein with reference to  FIG. 7 . 
     At block  1420 , the STA  115  may establish the secondary channel in the first radar subband based at least in part on the successful CAC as described herein with reference to  FIGS. 2-4 . In certain examples, the operations of block  1420  may be performed by the channel establishment manager  605  as described herein with reference to  FIG. 6 . 
     At block  1425 , the STA  115  may advertise a dual bandwidth capacity based at least in part on the primary channel and the successful CAC as described herein with reference to  FIGS. 2-4 . In certain examples, the operations of block  1425  may be performed by the advertisement manager  710  as described herein with reference to  FIG. 7 . 
     At block  1430 , the STA  115  may perform a second successful CAC on a second radar subband as described herein with reference to  FIGS. 2-4 . In certain examples, the operations of block  1430  may be performed by the CAC manager  715  as described herein with reference to  FIG. 7 . 
     At block  1435 , the STA  115  may add the second radar subband to a list of available radar subbands as described herein with reference to  FIGS. 2-4 . In certain examples, the operations of block  1435  may be performed by the radar subband list manager  725  as described herein with reference to  FIG. 7 . 
     At block  1440 , the STA  115  may determine that the list contains a threshold number of subbands as described herein with reference to  FIGS. 2-4 . In certain examples, the operations of block  1440  may be performed by the radar subband list manager  725  as described herein with reference to  FIG. 7 . 
     At block  1445 , the STA  115  may advertise the dual bandwidth capacity is based at least in part on the determination as described herein with reference to  FIGS. 2-4 . In certain examples, the operations of block  1445  may be performed by the advertisement manager  710  as described herein with reference to  FIG. 7 . 
     Thus, methods  900 ,  1000 ,  1100 ,  1200 ,  1300 , and  1400  may provide for soft AP master mode using dual wideband channels. It should be noted that methods  900 ,  1000 ,  1100 ,  1200 ,  1300 , and  1400  describe possible implementation, and that the operations and the steps may be rearranged or otherwise modified such that other implementations are possible. In some examples, aspects from two or more of the methods  900 ,  1000 ,  1100 ,  1200 ,  1300 , and  1400  may be combined. 
     The detailed description set forth above in connection with the appended drawings describes exemplary configurations and does not represent all the examples that may be implemented or that are within the scope of the claims. The term “exemplary” used throughout this description means “serving as an example, instance, or illustration,” and not “preferred” or “advantageous over other examples.” The detailed description includes specific details for the purpose of providing an understanding of the described techniques. These techniques, however, may be practiced without these specific details. In some instances, well-known structures and devices are shown in block diagram form in order to avoid obscuring the concepts of the described examples. 
     Information and signals may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof. 
     The various illustrative blocks and modules described in connection with the disclosure herein may be implemented or performed with a general-purpose processor, a digital signal processor (DSP), an ASIC, an FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general-purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors, microprocessors in conjunction with a DSP core, or any other such configuration). 
     The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted over as instructions or code on a computer-readable medium. Other examples and implementations are within the scope of the disclosure and appended claims. For example, due to the nature of software, functions described above can be implemented using software executed by a processor, hardware, firmware, hardwiring, or combinations of any of these. Features implementing functions may also be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations. Also, as used herein, including in the claims, “ or ” as used in a list of items (for example, a list of items prefaced by a phrase such as “at least one of” or “one or more of”) indicates an inclusive list such that, for example, a list of [at least one of A, B, or C] means A or B or C or AB or AC or BC or ABC (i.e., A and B and C). 
     Computer-readable media includes both non-transitory computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A non-transitory storage medium may be any available medium that can be accessed by a general purpose or special purpose computer. By way of example, and not limitation, non-transitory computer-readable media can comprise RAM, ROM, electrically erasable programmable read only memory (EEPROM), compact disk (CD) ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that can be used to carry or store desired program code means in the form of instructions or data structures and that can be accessed by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor. Also, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of medium. Disk and disc, as used herein, include CD, laser disc, optical disc, digital versatile disc (DVD), floppy disk and Blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above are also included within the scope of computer-readable media. 
     The previous description of the disclosure is provided to enable a person skilled in the art to make or use the disclosure. Various modifications to the disclosure will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other variations without departing from the scope of the disclosure. Thus, the disclosure is not to be limited to the examples and designs described herein but is to be accorded the broadest scope consistent with the principles and novel features disclosed herein.