Wireless local area network throughput and coverage with enhanced specific absorption

Abstract

Methods, systems, and devices for wireless communication are described. An access point (AP) and a station (STA) may communicate a frame according to a specific absorption rate (SAR) limit. The AP or STA may suspend or modify the SAR limit to support communicating frames with relatively higher transmit power. For example, the AP or STA may modify a SAR limit (e.g., a time-averaged SAR limit) for a time interval such that the AP or STA may increase transmit power for data frames. In some examples, the AP or STA may modify a duty cycle associated with the data frame based on modifying the SAR limit of the time interval. Additionally or alternatively, the AP or STA may suspend the SAR limit (e.g., a transmit power threshold associated with the SAR limit) so that the AP or STA may increase the transmit power of a control frame.

Description

Technical Field

[0001] The following relates to wireless communications, including wireless local area network (WLAN) throughput and coverage with enhanced specific absorption rate (SAR).

[0002] Related technical description

[0003] Wireless communication systems are widely deployed to provide various types of communication content, such as voice, video, packet data, messaging, broadcast, and the like. These systems may be multiple access systems that can support communication with multiple users by sharing available system resources (e.g., time, frequency, and power). A wireless network (e.g., a WLAN, such as a Wi-Fi (e.g., an Institute of Electrical and Electronics Engineers (IEEE) 802.11) network) may include an access point (AP) that can communicate with one or more stations (STAs) or mobile devices. An AP may be coupled to a network such as the Internet, and may enable mobile devices to communicate via the network (or communicate with other devices coupled to the AP). A wireless device may communicate bidirectionally with a network device. For example, in a WLAN, a STA may communicate with an associated AP via a downlink (DL) and uplink (UL) direction. A DL (or forward link) may refer to a communication link from an AP to a station, and a UL (or reverse link) may refer to a communication link from a station to an AP.

[0004] The AP and STA may communicate according to the specific absorption rate (SAR) limit. For example, the AP or STA may determine the transmit power of the frame so as not to exceed the SAR limit. Therefore, the transmit power of the frame may be limited by the SAR limit. However, in some cases, such as in a low signal strength scenario, the AP or STA may be configured to increase the transmit power of the frame, for example, to increase the signal strength of the frame. However, the AP or STA may be constrained by the SAR limit and cannot increase the transmit power, which may lead to problems such as reduced throughput and communication range between the AP and the STA. Summary of the invention

[0005] The systems, methods, and devices of the disclosure each have several innovative aspects, no single one of which is solely responsible for the desirable attributes disclosed herein.

[0006] (The content of this invention will be completed after the final approval of the claims) BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figures 1 to 5 Each illustrates an example of a wireless local area network (WLAN) supporting WLAN throughput and coverage with enhanced specific absorption rate (SAR) according to aspects of the present disclosure.

[0008] Figure 6 and Figure 7 A block diagram of a device supporting WLAN throughput and coverage with enhanced SAR in accordance with one or more aspects of the present disclosure is shown.

[0009] Figure 8 A block diagram of a communication manager supporting WLAN throughput and coverage with enhanced SAR is shown in accordance with one or more aspects of the present disclosure.

[0010] Fig. 9 A diagram of a system including a device supporting WLAN throughput and coverage with enhanced SAR is shown in accordance with one or more aspects of the present disclosure.

[0011] Figures 10 to 15 A flow chart illustrating a method of supporting WLAN throughput and coverage with enhanced SAR according to one or more aspects of the present disclosure is shown. DETAILED DESCRIPTION

[0012] A wireless local area network (WLAN) may support the communication of frames such as control frames (e.g., messages including control information) and data frames (e.g., messages including data) between an access point (AP) and a station (STA). In some cases, the transmit power of a given frame may be limited based on a specific absorption rate (SAR) limit, where SAR may refer to a measure of the rate at which radio frequency energy is absorbed by, for example, a human body. That is, an AP or STA may limit the transmit power of a given frame to avoid exceeding the SAR limit. However, in some cases, such transmit power limitations may reduce the throughput and coverage area of ​​the WLAN. For example, if a received signal strength indicator (RSSI) associated with communication between an AP and a STA is relatively low (e.g., below a threshold), the AP or STA may increase the transmit power of the frame, for example, to increase the signal strength between the AP and the STA. However, in some cases, due to the SAR limit, the AP or STA may not (e.g., be inhibited, constrained) increase the transmit power. For example, if increasing the transmit power will result in exceeding the SAR limit, the AP or STA may not increase the transmit power regardless of the signal strength between the AP and the STA. Additionally, in some cases, throughput may decrease as signal strength (e.g., RSSI measurement) decreases, and signal strength may decrease as the STA approaches the edge of the coverage area of ​​the AP. Therefore, throughput and coverage may be limited based on transmit power limits associated with SAR limits.

[0013] Various aspects generally relate to suspending or modifying SAR limits to support increased frame transmit power, and more specifically to supporting such transmit power increases using implementations of time-averaged SAR limits. For example, time-averaged SAR may refer to SAR over a duration. Thus, even if the SAR limit is exceeded at individual instances during the duration, the average transmit power over the duration may meet the SAR limit (e.g., because the transmit power at other instances during the duration may be less than the SAR limit). In some examples, an AP or STA may suspend the SAR limit for transmission of a control frame. For example, a control frame may have a relatively short duration (e.g., compared to the duration of a data frame). The SAR limit (e.g., a transmit power threshold associated with the SAR limit) may be removed when determining the transmit power of the control frame because the SAR limit may still be met from a time-averaged perspective. In some examples, an AP or STA may "borrow" transmit power from a duty cycle associated with communications between the AP and the STA to temporarily modify (e.g., increase) the SAR limit associated with transmission of a data frame. For example, a data frame may have a relatively long duration such that transmitting a data frame at a transmit power exceeding the SAR limit may risk exceeding the time-averaged SAR limit. To support increasing the SAR limit of the data frame, the AP or STA may reduce the duty cycle of the communication period (and other aspects) so that fewer signals are communicated (e.g., scheduled) during the communication period. Thus, the SAR limit may be increased, thereby supporting increasing the transmit power of the data frame while meeting the time-averaged SAR limit.

[0014] Certain aspects of the subject matter described in the present disclosure may be implemented to achieve one or more of the following potential advantages. The techniques employed by the described communication devices (e.g., APs, STAs) may provide benefits and enhancements, including increased throughput, communication reliability, and WLAN coverage, among other benefits. For example, temporarily suspending or modifying a SAR limit (e.g., a transmit power threshold associated with a SAR limit) will enable the communication device to increase the transmit power of a frame (e.g., by reducing the duty cycle of the transmission of a data frame) relative to the case where the SAR limit is implemented while meeting the time-averaged SAR limit. Increasing the transmit power will increase the signal strength of the frame, which will result in increased communication reliability and increased throughput. Additionally, increasing transmission will increase the coverage area of, for example, an AP by supporting an increased distance over which the AP and STA can communicate.

[0015] Aspects of the disclosure are initially described in the context of WLANs. Aspects of the disclosure are further illustrated by and described with reference to apparatus diagrams, system diagrams, and flow diagrams relating to WLAN throughput and coverage with enhanced SAR.

[0016] Figure 1A WLAN 100 (also referred to as a Wi-Fi network) configured according to various aspects of the present disclosure is illustrated. The WLAN 100 may include an AP 102 and a plurality of associated STAs 104, which may represent devices such as mobile stations, personal digital assistants (PDAs), other handheld devices, netbooks, notebooks, tablet computers, laptops, display devices (e.g., TVs, computer monitors, etc.), printers, etc. The AP 102 and associated STAs 104 may represent a basic service set (BSS) or an extended service set (ESS) (e.g., a collection of connected BSSs). The various STAs 104 in the network are able to communicate with each other through the AP 102. Also shown is a coverage area 110 of the AP 102, which may represent a basic service area (BSA) of the WLAN 100. Extended network stations (not shown) associated with the WLAN 100 may be connected to a wired or wireless distribution system that may allow multiple APs 102 to be connected in an ESS.

[0017] In the WLAN 100, the AP 102 and the STA 104 may communicate control frames and data frames. In some cases, the AP 102 and the STA 104 may communicate frames with a transmit power such that one or more limits may be met. For example, in some cases, the AP 102 and the STA 104 may communicate frames with a transmit power such that a SAR limit (e.g., an instantaneous SAR limit) may be met. That is, the transmit power of the frame may be such that the SAR limit is not exceeded. Additionally or alternatively, the AP 102 and the STA 104 may communicate one or more frames that are within a certain duration and have a transmit power such that a time-averaged SAR limit may be met.

[0018] According to the examples described herein, the AP 102, the STA 104, or both may be configured to suspend or modify the SAR limit (e.g., a transmit power threshold associated with the SAR limit) such that frames (e.g., control frames, data frames) may be transmitted at an increased transmit power relative to a situation where the SAR limit is not modified or implemented. In some examples, a duty cycle associated with a data frame may be modified (e.g., reduced) such that the time-averaged SAR limit may be met while supporting the transmission of the data frame at an increased transmit power. Communicating frames with increased transmit power may support increased WLAN coverage, increased throughput, increased communication reliability, and increased data rates, among other benefits.

[0019] Although not in Figure 1100, but a STA 104 may be located at the intersection of more than one coverage area 110 and may be associated with more than one AP 102. A collection of a single AP 102 and associated STAs 104 may be referred to as a BSS. An ESS is a collection of connected BSSs. A distribution system (not shown) may be used to connect the APs 102 in an ESS. In some cases, the coverage area 110 of an AP 102 may be divided into sectors (also not shown). The WLAN 100 may include APs 102 of different types (e.g., urban areas, home networks, etc.) with different and overlapping coverage areas 110.

[0020] Each of the STAs 104 may associate and communicate with the AP 102 via a communication link 120. The various STAs 104 in the WLAN 100 may be able to communicate with each other through the AP 102. The STAs 104 may operate and communicate (via corresponding communication links 120) in accordance with the IEEE 802.11 family of standards and amendments, including but not limited to 802.11a, 802.11b, 802.11g, 802.11n, 802.11ac, 802.11ad, 802.11ah, 802.11ay, 802.11ax, 802.11az, and 802.11ba. These standards define WLAN radio and baseband protocols for the PHY and medium access control (MAC) layers. The wireless devices in the WLAN 100 can communicate on an unlicensed spectrum, which can be a portion of a spectrum that includes frequency bands traditionally used by Wi-Fi technology, such as the 2.4 GHz band, the 5 GHz band, the 60 GHz band, the 3.6 GHz band, and the 900 MHz band. The unlicensed spectrum can also include other frequency bands, such as the emerging 6 GHz band. The wireless devices in the WLAN 100 can also be configured to communicate on other frequency bands, such as shared licensed frequency bands, where multiple operators may have licenses to operate in one or more of the same or overlapping frequency bands.

[0021] The two STAs 104 may also communicate directly via a direct wireless link 125, regardless of whether the two STAs 104 are in the same coverage area 110. Examples of direct wireless links 125 may include Wi-Fi direct connections, Wi-Fi tunneling direct link setup (TDLS) links, and other group connections. The STAs 104 and the APs 102 may communicate according to WLAN radio and baseband protocols for the physical layer and MAC layer 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, 802.11ax, etc. In other specific implementations, peer-to-peer connections or ad hoc networks may be implemented within the WLAN 100.

[0022] In some cases, a STA 104 (or AP 102) may be detected by the central AP 102 but not by other STAs 104 in the coverage area 110 of the central AP 102. For example, one STA 104 may be located at one end of the coverage area 110 of the central AP 102, while another STA 104 may be located at the other end. Therefore, the two STAs 104 may communicate with the AP 102 but may not receive each other's transmissions. This may cause transmission collisions of the two STAs 104 in a contention-based environment (e.g., CSMA / CA) because the STAs 104 may not suppress transmissions over each other. STAs 104 whose transmissions cannot be identified but are within the same coverage area 110 may be referred to as hidden nodes. CSMA / CA may be supplemented by the exchange of RTS packets sent by the transmitting STA 104 (or AP 102) and CTS packets sent by the receiving STA 104 (or AP 102). This can alert other devices within range of the transmitter and receiver that they are not transmitting for the duration of the primary transmission. RTS / CTS can therefore help mitigate the hidden node problem.

[0023] Figure 2 An example of a WLAN 200 supporting WLAN throughput and coverage with enhanced SAR according to one or more aspects of the present disclosure is illustrated. According to some aspects, the WLAN 200 may be an example of a WLAN. For example, the WLAN 200 may be a network implementing at least one of the IEEE 802.11 family of standards. The WLAN 200 may include a plurality of STAs 204. As described above, each STA 204 may also be referred to as a mobile station (MS), a mobile device, a mobile handset, a wireless handset, an access terminal (AT), a user equipment (UE), a subscriber station (SS), or a subscriber unit, etc. The STA 204 may represent a variety of devices, such as mobile phones, personal digital assistants (PDAs), other handheld devices, netbooks, notebook computers, tablet computers, laptop computers, display devices (e.g., TVs, computer monitors, navigation systems, etc.), music or other audio or stereo equipment, remote control devices (“remote controls”), printers, kitchen or other home appliances, key fobs (e.g., for passive keyless entry and start (PKES) systems), etc.

[0024] WLAN 200 is an example of a peer-to-peer (P2P), ad hoc, or mesh network. STAs 204 can communicate directly with each other via P2P wireless links 210 (without using an intermediate AP). In some implementations, WLAN 200 is an example of a neighbor awareness network (NAN). NAN operates according to the Wi-Fi Alliance (WFA) Neighbor Awareness Network (also referred to as NAN) standard specification. NAN compatible STAs 204 (hereinafter also referred to as "NAN devices 204") use a data packet routing protocol for path selection (such as the Hybrid Wireless Mesh Protocol (HWMP)) to send and receive NAN communications (for example, in the form of Wi-Fi packets, including frames that comply with IEEE 802.11 wireless communication protocol standards (such as standards defined by the IEEE 802.11-2016 specification or its amendments, including but not limited to 802.11ay, 802.11ax, 802.11az, 802.11ba and 802.11be)) to each other via a wireless P2P link 210 (hereinafter also referred to as a "NAN link").

[0025] A NAN network generally refers to a collection of NAN devices that share a common NAN parameter set, which includes: the time period between consecutive discovery windows, the duration of the discovery window, the NAN beacon interval, and the NAN discovery channel. The NAN ID is an identifier that represents a specific NAN parameter set used within the NAN network. The NAN network is dynamically self-organizing and self-configuring. The NAN devices 204 in the network automatically establish a self-organizing network with other NAN devices 204 so that network connectivity can be maintained. Each NAN device 204 is configured to relay data for the NAN network so that the individual NAN devices 204 can collaborate in data distribution within the network. Therefore, a message can be sent from a source NAN device to a destination NAN device by propagating along a path that jumps from one NAN device to the next NAN device until it reaches the destination.

[0026] Each NAN device 204 is configured to send two types of beacons: NAN discovery beacons and NAN synchronization beacons. When the NAN device 204 is turned on, or otherwise when the NAN functionality is enabled, the NAN device periodically sends NAN discovery beacons (e.g., every 100 TUs, every 128 TUs, or another suitable period) and NAN synchronization beacons (e.g., every 512 TUs or another suitable period). Discovery beacons are management frames sent between discovery windows to facilitate the discovery of NAN clusters. A NAN cluster is a collection of NAN devices within a NAN network that are synchronized to the same clock and discovery window schedule using a time synchronization function (TSF). In order to join a NAN cluster, a NAN device 204 passively scans for discovery beacons from other NAN devices. When two NAN devices 204 enter each other's transmission range, they will discover each other based on such discovery beacons. The corresponding master preference value determines which NAN device in the NAN device 204 will become the master device. If no NAN cluster is discovered, the NAN device 204 may start a new NAN cluster. When the NAN device 204 starts a NAN cluster, it assumes the master role and broadcasts a discovery beacon. Additionally, a NAN device may choose to participate in more than one NAN cluster within a NAN network.

[0027] The links between NAN devices 204 in a NAN cluster are associated with a discovery window (the time and channel where NAN devices converge). At the beginning of each discovery window, one or more NAN devices 204 may send a NAN synchronization beacon, which is a management frame used to synchronize the timing of NAN devices within the NAN cluster to the timing of the master device. The NAN device 204 may then send a multicast or unicast NAN service discovery frame directly to other NAN devices within the service discovery threshold and in the same NAN cluster during the discovery window. The service discovery frame indicates the services supported by the corresponding NAN device 204.

[0028] In some examples, the NAN devices 204 may exchange service discovery frames to confirm whether both devices support ranging operations. The NAN devices 204 may perform such ranging operations (“ranging”) during the discovery window. Ranging may involve exchanging fine timing measurement (FTM) frames (such as those defined in IEEE 802.11-REVmc). For example, the first NAN device 204 may send a unicast FTM request to multiple peer NAN devices 204. The peer NAN devices 204 may then send a response to the first NAN device 204. The first NAN device 204 may then exchange a number of FTM frames with each of the peer NAN devices 204. The first NAN device 204 may then determine the range between itself and each peer device 204 based on the FTM frames and send a range indication to each peer NAN device 204. For example, the range indication may include a distance value or an indication of whether the peer NAN device 204 is within a service discovery threshold (e.g., 3 meters (m)) of the first NAN device 204. NAN links between NAN devices within the same NAN cluster may survive over multiple discovery windows as long as the NAN devices remain within each other's service discovery thresholds and synchronized with the anchor master device of the NAN cluster.

[0029] Some NAN devices 204 may also be configured to communicate wirelessly with other networks, such as with a Wi-Fi WLAN or a wireless (e.g., cellular) wide area network (WWAN), which in turn may provide access to external networks, including the Internet. For example, the NAN device 204 may be configured to associate and communicate with an AP or base station 202 of a WLAN or WWAN network, respectively, via a Wi-Fi or cellular link 212. In such instances, the NAN device 204 may include SoftAP functionality, enabling a STA to operate as a Wi-Fi hotspot to provide access to external networks to other NAN devices 204 via an associated WLAN or WWAN backhaul. Such NAN devices 204, referred to as NAN concurrent devices, are capable of operating in a NAN network as well as another type of wireless network, such as a Wi-Fi BSS. In some such implementations, the NAN device 204 may advertise the ability to provide such AP services to other NAN devices 204 in a service discovery frame.

[0030] There are two general NAN service discovery messages: publish messages and subscribe messages. In general, publish is a mechanism for an application on a NAN device to make selected information about the capabilities and services of the NAN device available to other NAN devices, while subscription is a mechanism for an application on a NAN device to collect selected types of information about the capabilities and services of other NAN devices. A NAN device may generate and send a subscription message when requesting other NAN devices operating within the same NAN cluster to provide a specific service. For example, in active subscriber mode, a subscription function executed within a NAN device may send a NAN service discovery frame to actively seek the availability of a specific service. A publishing function executed within a publishing NAN device that is capable of providing the requested service may, for example, send a publish message in response to satisfying the criteria specified in the subscription message to reply to the subscribing NAN device. The publish message may include a range parameter indicating a service discovery threshold, which represents the maximum distance at which a subscribing NAN device can utilize the service of the publishing NAN device itself. NAN may also use publish messages in an unsolicited manner, for example, a publisher NAN device may generate and send a publish message to make its service discoverable by other NAN devices operating within the same NAN cluster. In passive subscriber mode, the subscribing function does not initiate the delivery of any subscription messages, instead, the subscribing function looks for matches in received publish messages to determine the availability of the desired service.

[0031] The discovery window is followed by a transmit opportunity period. The period includes multiple resource blocks. A NAN device link (NDL) refers to a resource block negotiated between NAN devices for NAN operation. NDL may include more than one "hop". The number of hops depends on the number of devices between the device providing the service and the device consuming or subscribing to the service. An example of a two-hop NDL includes three NAN devices: a provider, a subscriber, and an agent that relays information between the provider and the subscriber. In this configuration, the first hop refers to the communication of information between the provider and the agent, and the second hop refers to the communication of information between the agent and the subscriber. NDL may refer to a subset of NAN devices capable of one-hop service discovery, but NDL may also be capable of service discovery and subscription over multiple hops (multi-hop NDL).

[0032] There are two general types of NDL: paging NDL (P-NDL) and synchronization NDL (S-NDL). Each common resource block (CRB) of P-NDL includes a paging window (PW) followed by a transmit window (TxW). All NAN devices participating in P-NDL operate in a state of receiving frames during the paging window. Typically, participating NAN devices wake up during the paging window to listen to the paging channel to determine whether there is any traffic buffered for the corresponding device. For example, a NAN device with pending data for transmission to another NAN device may send a traffic announcement message to the other NAN device during the paging window to notify the other NAN device of the buffered data. If there is available data, the NAN device remains awake during the transmit window to exchange data. If there is no data to be transmitted, the NAN device may transition back to a sleep state during the transmit window to save power. If the NAN device has buffered data available to the peer, it sends a paging message to its NDL peer during the paging window. The paging message includes, for example, a MAC address or identifier of the destination device for which the data is available. A NAN device listed as a receiver in a received paging message sends a trigger frame to the sending device and remains awake during a subsequent sending window to receive data. The NDL sender device sends buffered data to the receiving device from which the NDL sender device received the trigger frame during the sending window. A NAN device that establishes S-NDL with a peer NAN device can send data frames to the peer starting from each S-NDL CRB without sending a paging message in advance.

[0033] According to examples described herein, the NAN device 204, the AP 202, or both can be configured to suspend or modify the SAR limit (e.g., a transmit power threshold associated with the SAR limit) such that frames can be transmitted at an increased transmit power relative to a situation where the SAR limit is implemented. In some examples, a duty cycle associated with a data frame can be modified (e.g., reduced) such that the time-averaged SAR limit can be met while supporting the transmission of data frames at an increased transmit power.

[0034] Figure 3 An example of a WLAN 300 supporting WLAN throughput and coverage with enhanced SAR according to one or more aspects of the present disclosure is illustrated. According to some aspects, the WLAN 300 may be an example of a mesh network, an IoT network, or a sensor network. The WLAN 300 includes a plurality of wireless communication devices 314. The wireless communication devices 314 may represent a variety of devices, such as a display device (e.g., a TV, a computer monitor, a navigation system, etc.), a music or other audio or stereo device, a remote control device (“remote control”), a printer, a kitchen or other home appliance, and the like.

[0035] In some embodiments, the wireless communication device 314 senses, measures, collects, or otherwise obtains and processes data, and then sends such raw or processed data to the intermediate device 312 for subsequent processing or distribution. Additionally or alternatively, the intermediate device 312 may send control information, digital content (e.g., audio or video data), configuration information, or other instructions to the wireless communication device 314. The intermediate device 312 and the wireless communication device 314 may communicate with each other via a wireless link 316. In some implementations, the wireless link 316 includes a Bluetooth link or other PAN or short-range communication link.

[0036] In some examples, the intermediate device 312 may also be configured to wirelessly communicate with other networks, such as with a Wi-Fi WLAN or a wireless (e.g., cellular) wide area network (WWAN), which in turn may provide access to external networks, including the Internet. For example, the intermediate device 312 may be configured to associate and communicate with an AP 302 of a WLAN network via a Wi-Fi link 318, which may also serve various STAs 304. In some implementations, the intermediate device 312 is an example of a network gateway (e.g., an IoT gateway). In this way, the intermediate device 312 may act as an edge bridge that provides Wi-Fi core backhaul for an IoT network including a wireless communication device 314. In some implementations, the intermediate device 312 may be configured to analyze, pre-process, and aggregate data received from a wireless communication device 314 locally at the edge before sending the data to other devices or external networks via a Wi-Fi link 318. The intermediate device 312 may also be configured to provide additional security for the IoT network and the data it transmits.

[0037] According to the examples described herein, the AP 302, STA 304, intermediate device 312, or wireless communication device 314 may be configured to suspend or modify the SAR limit (e.g., a transmit power threshold associated with the SAR limit) such that a frame may be transmitted at an increased transmit power relative to a situation where the SAR limit is implemented. In some examples, a duty cycle associated with a data frame may be modified (e.g., reduced) such that the time-averaged SAR limit may be met while supporting the transmission of the data frame at an increased transmit power.

[0038] Figure 4 An example of a WLAN 400 that supports WLAN throughput and coverage with enhanced SAR according to one or more aspects of the present disclosure is illustrated. In some aspects, the WLAN 400 may implement the WLAN 400 as described herein, respectively. Figures 1 to 3Aspects of the WLANs 100, 200, and 300 described herein may be implemented or implemented by them. For example, WLAN 400 may include wireless communication devices, such as device 405-a and device 405-b. In some examples, device 405-a may be an example of a STA described herein (e.g., STA 104, 204, 304), and device 405-b may be an example of an AP described herein (e.g., AP 102, 202, 302). In some examples, device 405-a may be an example of an AP, and device 405-b may be an example of a STA.

[0039] WLAN 400 may support communication between device 405-a and device 405-b. For example, device 405-a and device 405-b may communicate messages (e.g., frames) via communication link 410, which may be an example of a communication link described herein, such as communication link 120, direct wireless link 125, P2P link 210, wireless link 316, or Wi-Fi link 318, as well as other types of communication links.

[0040] In some examples, the device 405 may determine the transmit power 455 of the frame based in part on or according to various transmit power limits. For example, the maximum transmit power 455 of the frame may correspond to the minimum of the absorption rate limit 440, the channel limit 445, the capacity limit 450, or a combination thereof. The capacity limit 450 may be associated with the hardware capabilities of the device 405. For example, the capacity limit 450 may correspond to the transmit power that the hardware of the device 405 can support. The channel limit 445 may be associated with the channel through which the frame is transmitted. For example, the device 405 may communicate via various channels corresponding to various frequency bands. In some cases, a frame communicated via one channel may interfere with a frame communicated via another channel. The channel limit 445 may correspond to a transmit power limit of a channel associated with reducing or mitigating interference to other channels. In some examples, the channel limit 445 may be referred to as a confirmatory test limit (CTL).

[0041] Absorption rate limit 440 may correspond to or be associated with a SAR limit. For example, absorption rate limit 440 may correspond to a transmit power threshold (e.g., transmit power limit) associated with ensuring that a SAR limit is met when a frame is communicated between devices 405. That is, absorption rate limit 440 may limit the transmit power 455 of a frame so that the SAR associated with the frame is less than (e.g., or equal to) the SAR limit. In some examples, absorption rate limit 440 may be associated with a time-averaged SAR limit. For example, time-averaged SAR may refer to a SAR measured over a certain duration, such as over time, rather than an instantaneous SAR measurement. In some cases, the transmit power 455 of a frame may cause the SAR limit to be exceeded at multiple instances during the duration, however, the average transmit power within the duration may meet the SAR limit. That is, despite transmitting some frames with transmit power 455 that would otherwise exceed the SAR limit, the device 405 (e.g., a device under test (DUT) transmitter) may comply with the SAR limit. For example, the transmit power 455 at some other time instances may be lower than the SAR limit to compensate for (e.g., offset) instances where the transmit power 455 causes the SAR limit to be exceeded.

[0042] In some cases, the duration associated with the time-averaged SAR limit may be a configured value (e.g., a preconfigured value, a standardized value, a defined value). For example, the duration may be configured as a 30-second time window such that the average SAR of communications sent by the device 405 within the time window meets the SAR limit. In some cases, a regulatory body such as the Federal Communications Commission (FCC) may define the duration of the time window for the time-averaged SAR limit. In some examples, the time window may be divided into subintervals of time (e.g., by the device 405) to facilitate transmit power determination and compliance with the time-averaged SAR limit. For example, an absorption rate limit 440 may be determined (e.g., calculated) for each subinterval of the time window (e.g., a 500-millisecond subinterval of a 30-second time window, and other durations of the subinterval) such that the time-averaged SAR limit may be met within the time window. For example, for a given subinterval, the device 405 may determine the absorption rate limit 440 based on the cumulative transmit power used by the device 405 so far during the time window, the remaining duration of the time window, or a combination thereof. The absorption rate limit 440 may be recalculated for each subinterval.

[0043] In some cases, the absorption rate limit 440 may be less than the channel limit 445 and the capacity limit 450. Here, the absorption rate limit 440 may be a limiting factor in determining the maximum transmit power 455 of the frame. For example, because the absorption rate limit 440 may be the minimum of the absorption rate limit 440, the channel limit 445, and the capacity limit 450, the maximum transmit power 455 of the frame may correspond to the maximum transmit power allowed by the absorption rate limit 440. However, in some cases, such transmit power limitations may result in reduced throughput, reduced coverage of the WLAN 400, or both. For example, a low RSSI area of ​​the WLAN 400 may be associated with reduced throughput, or may not be covered by the WLAN 400 (e.g., communications in the low RSSI area may not be supported). By increasing the transmit power of the frame, the throughput may be increased and / or the coverage may be extended. However, in some cases, due to constraints associated with the absorption rate limit 440, the transmit power may not be increased.

[0044] According to examples described herein, an absorption rate limit 440 (e.g., a transmit power threshold associated with a SAR limit) may be temporarily suspended (e.g., removed) as a threshold for determining a transmit power 455 of a frame. For example, a device 405-a may schedule the transmission of a control frame 425 (e.g., a management and control frame, a feedback frame such as an acknowledgement (ACK) frame) to a device 405-b (e.g., receive a message scheduling it). Based on the scheduling of the control frame 425, the device 405-a may suspend the absorption rate limit 440. For example, the device 405-a may be configured to suspend the absorption rate limit 440 in response to the scheduling of the control frame 425. In some examples, the device 405-a may be configured to suspend the absorption rate limit 440 of the control frame 425 based on the duration of the control frame 425 being less than a threshold duration. For example, the duration of the control frame 425 may be relatively short compared to the duration of the data frame 430 or the duration of a subinterval of the averaging time window. Therefore, the transmit power 455 of the control frame 425 may be increased with relatively minimal impact on the average SAR. To support the increased transmit power 455 of the control frame 425 , the device 405 - a may suspend the absorption rate limit 440 , thereby not considering the absorption rate limit 440 as a threshold for determining the transmit power 455 .

[0045] Device 405-a may determine a transmit power 455 of control frame 425 based on pausing absorption rate limit 440, and transmit control frame 425 with transmit power 455 to device 405-b. Based on the suspension, transmit power 455 may be greater than absorption rate limit 440. For example, due to the suspension of absorption rate limit 440, maximum transmit power 455 of control frame 425 may instead be based on (e.g., limited by) capability limit 450 and channel limit 445. In some examples, capability limit 450 and channel limit 445 may be greater than absorption rate limit 440, and thus, if absorption rate limit 440 is implemented (e.g., enforced), maximum possible transmit power 455 of control frame 425 based on capability limit 450 and channel limit 445 may be greater than maximum possible transmit power 455 of control frame 425. Therefore, device 405-a may determine transmit power 455 according to capability limit 450 and channel limit 445. In some examples, transmit power 455 may be equal to the minimum of capacity limit 450 and channel limit 445 .

[0046] In some examples, device 405-a may restore absorption rate limit 440 to a threshold value for determining transmit power 455 for transmission of data frame 430. For example, device 405-a may schedule transmission of data frame 430 to device 405-b. Device 405-a may be configured to implement absorption rate limit 440 for transmission of data frame 430, for example, based on a duration of data frame 430 failing to meet (e.g., meeting or exceeding) a threshold duration. Based on scheduling data frame 430, device 405-a may restore absorption rate limit 440. Thus, the threshold value for determining transmit power 455 for data frame 430 may include capability limit 450, channel limit 445, and absorption rate limit 440. Device 405-a may transmit data frame 430 having transmit power 455 determined according to the implemented limits. In some examples, device 405 - a may be configured to modify absorption rate limit 440 when determining transmit power 455 of data frame 430 , for example based on RSSI, such that transmit power 455 of data frame 430 may be increased. Figure 5 Additional details related to modifying the absorption rate limit 440 used to transmit the data frame 430 are described.

[0047] By temporarily suspending or modifying absorption rate limit 440, device 405 may support increasing transmit power 455 used to communicate frames, which may increase throughput, communication reliability, and coverage area of ​​WLAN 400 (e.g., APs in WLAN 400), among other benefits, for example, by increasing signal strength associated with frames.

[0048] Figure 5An example of a WLAN 500 that supports WLAN throughput and coverage with enhanced SAR according to one or more aspects of the present disclosure is illustrated. In some aspects, the WLAN 500 may implement the WLAN 500 as described herein, respectively. Figures 1 to 4 Aspects of the WLANs 100, 200, 300, and 400 described herein may be implemented or implemented by them. For example, WLAN 500 may include wireless communication devices, such as device 505-a and device 505-b. In some examples, device 505-a may be an example of a STA described herein, and device 505-b may be an example of an AP described herein. In some examples, device 405-a may be an example of an AP, and device 405-b may be an example of a STA.

[0049] WLAN 500 may support communication between device 505-a and device 505-b. For example, device 505-a and device 505-b may communicate messages (eg, frames) via communication link 510, which may be an example of a communication link described herein.

[0050] Device 505 may communicate data, for example, via data frame 525. Device 505 may be configured to determine transmit power 570 of data frame 525 according to various limits, such as capability limit 545, channel limit 540, and absorption rate limit 535, which may be reference limits, respectively. Figure 4 535 . In some examples, the absorption rate limit 535 may be less than the capability limit 545 and the channel limit 540, and thus may be a limiting factor in determining the transmit power 570 of the data frame 525. For example, the maximum transmit power of the data frame 525 may correspond to the absorption rate limit 535. However, in some cases, such transmit power limitation may result in reduced throughput, reduced coverage of the WLAN 500, or both. To support increased transmit power, the absorption rate limit 535 may be suspended for the transmission of some types of frames (e.g., control frames), however, temporarily suspending the absorption rate limit 535 for the data frame 525 may increase the risk of not meeting the time-averaged SAR limit, or reduce the absorption rate limit 535 calculated for subsequent subintervals of the averaging time window associated with the time-averaged SAR limit. For example, if the absorption rate limit 535 is suspended, the transmit power 570 of the data frame 525 may be increased so that the absorption rate limit 535 calculated for a subsequent subinterval may be reduced to comply with the time-averaged SAR limit, which may reduce the signal strength and transmit power 570 of the data frame 525 scheduled during the subsequent subinterval.

[0051] According to examples described herein, device 505 may "borrow" transmit power from a duty cycle 585 associated with communications between devices 505 to support modifying absorption rate limit 535 so that transmit power 570 of data frame 525 may be increased. For example, duty cycle 585 may correspond to a duration during interval 580 during which, for example, device 505-a may transmit a signal to device 505-b. In some examples, interval 580 may correspond to a sub-interval of an averaging time window (e.g., a time interval during which absorption rate limit 535 applies). Device 505-a may be configured to reduce duty cycle 585 so that absorption rate limit 535 may increase and apply to interval 580. For example, reducing duty cycle 585 may reduce the number of signals that device 505-a may transmit during interval 580 (e.g., reduce the number of frames that may be scheduled during interval 580). Thus, the device 505-a may increase the transmit power 570 of one or more frames that can be scheduled during the interval 580 without (e.g., or minimally) affecting the average transmit power within the interval 580. Such a reduction in duty cycle 585 to support the increased transmit power 570 may be referred to as borrowing transmit power from the duty cycle 585.

[0052] In some examples, the device 505-a can determine the transmit power 570 of the data frame 525 according to the process flow 530. In the following description of the process flow 530, the operations can be performed in an order different from the order shown. Certain operations can also be excluded from the process flow 530, or other operations can be added to the process flow 530. In addition, although some operations or signaling are shown as occurring at different times for discussion purposes, these operations can actually occur simultaneously.

[0053] At 555, device 505-a may evaluate various thresholds to determine whether the absorption rate limit 535 of interval 580 can be modified. For example, device 505-a may receive reference signal 520 associated with measuring signal strength S1 between device 505-a and device 505-b (e.g., determining RSSI) from device 505-b. Device 505-a may determine (e.g., calculate) absorption rate limit R1 for interval 580. To determine whether to modify absorption rate limit 535, device 505-a may determine whether signal strength S1 and absorption rate limit R1 meet corresponding thresholds. For example, device 505-a may compare signal strength S1 with signal strength threshold T1 (e.g., RSSI with T1), and compare absorption rate limit R1 with absorption rate threshold T2.

[0054] In some examples, device 505-a may determine that one or more of signal strength S1 and absorption rate limit R1 meet corresponding thresholds (e.g., S1≥T1, R1≥T2, or both). Here, device 505-a may refrain from modifying absorption rate limit R1 and duty cycle 585. For example, signal strength S1 greater than threshold T1 may indicate that there is no need to increase the transmit power of data frame 525 due to the presence of sufficient signal strength between devices 505. Additionally or alternatively, threshold T2 may be set to support a time-averaged SAR limit that meets the averaging time window, a sufficient transmit power limit for subsequent interval 580, or a combination thereof. Device 505-a may schedule the transmission of data frame 525 and send data frame 525 to device 505-b, the data frame having a transmit power 570 determined based on the unmodified absorption rate limit R1.

[0055] In some other examples, the device 505-a may determine that the signal strength threshold S1 and the absorption rate limit R1 fail to meet the corresponding thresholds (e.g., S1<T1 and R1<T2). In such examples, the device 505-a may modify the absorption rate limit R1 and the duty cycle 585. For example, at 560, the device 505-a may increase the absorption rate limit R1. In some examples, to modify the absorption rate limit R1, the device 505-a may set the absorption rate limit R1=T2. Based on the modified absorption rate limit R1, the device 505-a may increase the transmission power 570 of the data frame 525 relative to the case where the absorption rate limit R1 is not modified. For example, by increasing the limit imposed by the absorption rate limit R1, increasing the absorption rate limit R1 can increase the maximum potential transmission power of the data frame 525. Therefore, device 505-a may schedule transmission of data frame 525 and transmit data frame 525 to device 505-b, the data frame having transmit power 570 determined according to modified absorption rate limit R1, channel limit 540, and capacity limit 545. Based on the modified absorption rate limit R1, transmit power 570 of data frame 525 may be greater than the unmodified absorption rate limit R1 (e.g., a transmit power threshold associated with the unmodified absorption rate limit R1).

[0056] The transmit power 570 of the data frame 525 may be increased by borrowing transmit power from the duty cycle 585. For example, at 565, the device 505-a may reduce (e.g., suppress) the duty cycle 585 to support a time-averaged SAR limit that conforms to the averaging time window (e.g., the time interval including the interval 580). The device 505-a may reduce the duty cycle, as depicted in the duty cycle graph 575. For example, the duty cycle graph 575 may illustrate a corresponding waveform of the duty cycle 585, which may represent the amount of time of the corresponding interval 580 that the device 505-a may transmit a signal. The duty cycle graph 575 illustrates the interval 580-a and the interval 580-b associated with the duty cycle 585-a and the duty cycle 585-b, respectively. The duty cycle 585-b may be less than the duty cycle 585-a, which may correspond to fewer signals being able to be scheduled and transmitted during the interval 580-b relative to the interval 580-a. In some examples, device 505 - a may modify duty cycle 585 of interval 580 , for example, by reducing duty cycle 585 from duty cycle 585 - a to duty cycle 585 - b .

[0057] Device 505-a may schedule (e.g., using scheduler 550) one or more data frames 525 to send to device 505-b according to the modified duty cycle 585 and the modified absorption rate limit R1. For example, device 505-a may schedule one or more data frames 525 so that duty cycle 585 may be met, and may send one or more data frames 525 according to the modified absorption rate limit R1.

[0058] In some examples, the absorption rate limit 535 and the duty cycle 585 may be repeatedly modified, for example, until the threshold T1 is met. For example, the device 505-a may send the data frame 525-a during the interval 580-a according to the modified duty cycle 585-a and the modified absorption rate limit R1 (e.g., based on the signal strength S1 and the absorption rate limit R1 failing to meet the corresponding thresholds T1 and T2). During a subsequent interval 580 (e.g., interval 580-b), the device 505-a may receive the second reference signal 520 and measure the signal strength S2. The device 505-a may determine the absorption rate limit R2 for the interval 580-b, and may determine whether the signal strength S2 and the absorption rate limit R2 meet the corresponding thresholds. For example, the device 505-a may determine whether the signal strength S2 meets the threshold T1 and whether the absorption rate limit R2 meets the absorption rate threshold T3, which may be greater than the absorption rate threshold T2. For example, the absorption rate threshold T3 may be greater than T2 to support a further increase in the absorption rate limit 535 relative to the increase during the interval 580-a, so that the transmit power 570 can be further increased. For example, if the thresholds T1 and T3 are not met, the device 505-a may set the absorption rate limit R2 to T3 and further reduce the duty cycle to the duty cycle 585-b to support the increased absorption rate limit R2. Therefore, the device 505-a may determine that the transmit power 570 of the data frame 525-b during the interval 580-b is greater than the transmit power 570 of the data frame 525-a, which may increase the possibility that the signal strength of the data frame 525-b meets the threshold T1.

[0059] Figure 6 A block diagram of a device 605 supporting WLAN throughput and coverage with enhanced SAR according to one or more aspects of the present disclosure is shown. The device 605 may be an example of aspects of an AP or STA as described herein. The device 605 may include a receiver 610, a transmitter 615, and a communication manager 620. The communication manager 620 may be implemented at least in part by one or both of a modem and a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0060] Receiver 610 may provide means for receiving information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to WLAN throughput and coverage with enhanced SAR). The information may be communicated to other components of device 605. Receiver 610 may utilize a single antenna or a collection of multiple antennas.

[0061] Transmitter 615 may provide means for transmitting signals generated by other components of device 605. Transmitter 615 may utilize a single antenna or a collection of multiple antennas.

[0062] The communication manager 620, the receiver 610, the transmitter 615, or various combinations thereof or various components thereof may be examples of means for performing various aspects of WLAN throughput and coverage with enhanced SAR as described herein. For example, the communication manager 620, the receiver 610, the transmitter 615, or various combinations thereof or components thereof may support methods for performing one or more of the functions described herein.

[0063] In some examples, the communication manager 620, the receiver 610, the transmitter 615, or various combinations or components thereof may be implemented in hardware (e.g., in a communication management circuit). The hardware may include a processor, a digital signal processor (DSP), a central processing unit (CPU), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, a microcontroller, discrete gate or transistor logic, discrete hardware components, or any combination thereof that is configured as or otherwise supports components for performing the functions described in the present disclosure. In some examples, a processor and a memory coupled to the processor may be configured to perform one or more functions described herein (e.g., by executing instructions stored in the memory by the processor).

[0064] In some examples, communication manager 620 can be configured to perform various operations (e.g., receive, obtain, monitor, output, send) using or otherwise cooperating with receiver 610, transmitter 615, or both. For example, communication manager 620 can receive information from receiver 610, transmit information to transmitter 615, or integrate in conjunction with receiver 610, transmitter 615, or both to obtain information, output information, or perform various other operations as described herein.

[0065] The communication manager 620 may support wireless communication at the first wireless device according to examples as disclosed herein. For example, the communication manager 620 may be configured to or otherwise support components for receiving a reference signal associated with measuring a signal strength between the first wireless device and the second wireless device. The communication manager 620 may be configured to or otherwise support components for determining that a SAR limit associated with communication between the first wireless device and the second wireless device for a first time interval is less than a threshold. The communication manager 620 may be configured to or otherwise support components for modifying a SAR limit for the first time interval based on the signal strength failing to satisfy the signal strength threshold and the SAR limit for the first time interval being less than the threshold. The communication manager 620 may be configured to or otherwise support components for transmitting a data frame during the first time interval, the data frame having a transmit power based on the modified SAR limit for the first time interval.

[0066] Additionally or alternatively, the communication manager 620 may support wireless communications at the first wireless device according to examples as disclosed herein. For example, the communication manager 620 may be configured to or otherwise support components for scheduling transmission of control frames to the second wireless device. The communication manager 620 may be configured to or otherwise support components for suspending a transmit power threshold associated with a SAR limit for communications between the first wireless device and the second wireless device based on the schedule. The communication manager 620 may be configured to or otherwise support components for transmitting a control frame having a transmit power greater than a transmit power threshold to the second wireless device based on suspending the transmit power threshold.

[0067] By including or configuring a communication manager 620 according to examples as described herein, a device 605 (e.g., a processor controlling or otherwise coupled with a receiver 610, a transmitter 615, a communication manager 620, or a combination thereof) may support techniques for increased throughput, communication reliability, and WLAN coverage area, among other benefits.

[0068] Figure 7 A block diagram of a device 705 supporting WLAN throughput and coverage with enhanced SAR according to one or more aspects of the present disclosure is shown. The device 705 may be an example of aspects of the device 605, AP, or STA as described herein. The device 705 may include a receiver 710, a transmitter 715, and a communication manager 720. The communication manager 720 may be implemented at least in part by one or both of a modem and a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0069] Receiver 710 may provide means for receiving information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to WLAN throughput and coverage with enhanced SAR). The information may be communicated to other components of device 705. Receiver 710 may utilize a single antenna or a collection of multiple antennas.

[0070] The transmitter 715 may provide means for transmitting signals generated by the other components of the device 705. The transmitter 715 may utilize a single antenna or a collection of multiple antennas.

[0071] The device 705 or its various components may be examples of components for performing various aspects of WLAN throughput and coverage with enhanced SAR as described herein. For example, the communication manager 720 may include a reference signal component 725, a threshold component 730, a SAR component 735, a frame component 740, a scheduling component 745, or any combination thereof. In some examples, the communication manager 720 or its various components may be configured to perform various operations (e.g., receive, obtain, monitor, output, transmit) using or otherwise cooperating with the receiver 710, the transmitter 715, or both. For example, the communication manager 720 may receive information from the receiver 710, transmit information to the transmitter 715, or be integrated in combination with the receiver 710, the transmitter 715, or both to obtain information, output information, or perform various other operations as described herein.

[0072] The communication manager 720 may support wireless communication at the first wireless device according to examples as disclosed herein. The reference signal component 725 may be configured to or otherwise support components for receiving a reference signal associated with measuring a signal strength between the first wireless device and the second wireless device. The threshold component 730 may be configured to or otherwise support components for determining that a SAR limit associated with communication between the first wireless device and the second wireless device for a first time interval is less than a threshold. The SAR component 735 may be configured to or otherwise support components for modifying a SAR limit for the first time interval based on the signal strength failing to satisfy a signal strength threshold and the SAR limit for the first time interval being less than the threshold. The frame component 740 may be configured to or otherwise support components for transmitting a data frame during the first time interval, the data frame having a transmit power based on the modified SAR limit for the first time interval.

[0073] Additionally or alternatively, the communication manager 720 may support wireless communications at the first wireless device according to examples as disclosed herein. The scheduling component 745 may be configured to or otherwise support means for scheduling transmission of a control frame to the second wireless device. The threshold component 730 may be configured to or otherwise support means for suspending a transmit power threshold associated with a SAR limit for communications between the first wireless device and the second wireless device based on the schedule. The frame component 740 may be configured to or otherwise support means for transmitting a control frame having a transmit power greater than a transmit power threshold to the second wireless device based on suspending the transmit power threshold.

[0074] Figure 8A block diagram of a communication manager 820 that supports WLAN throughput and coverage with enhanced SAR in accordance with one or more aspects of the present disclosure is shown. The communication manager 820 or its various components may be examples of means for performing various aspects of WLAN throughput and coverage with enhanced SAR as described herein. For example, the communication manager 820 may include a reference signal component 825, a threshold component 830, a SAR component 835, a frame component 840, a scheduling component 845, a duty cycle component 850, a transmit power component 855, or any combination thereof. Each of these components may communicate with each other directly or indirectly (e.g., via one or more buses).

[0075] The communication manager 820 may support wireless communication at the first wireless device according to examples as disclosed herein. The reference signal component 825 may be configured to or otherwise support components for receiving a reference signal associated with measuring a signal strength between the first wireless device and the second wireless device. The threshold component 830 may be configured to or otherwise support components for determining that a SAR limit associated with communication between the first wireless device and the second wireless device for a first time interval is less than a threshold. The SAR component 835 may be configured to or otherwise support components for modifying a SAR limit for the first time interval based on the signal strength failing to satisfy a signal strength threshold and the SAR limit for the first time interval being less than the threshold. The frame component 840 may be configured to or otherwise support components for transmitting a data frame during the first time interval, the data frame having a transmit power based on the modified SAR limit for the first time interval.

[0076] In some examples, duty cycle component 850 can be configured or otherwise support means for modifying a duty cycle associated with a first time interval based on modifying the SAR limit of the first time interval, wherein the data frame is transmitted according to the modified duty cycle.

[0077] In some examples, to support modifying the duty cycle, the duty cycle component 850 may be configured to or otherwise support components for reducing the duty cycle to reduce the duration of a first time interval in which the first wireless device sends a signal to the second wireless device, wherein the duration of the data frame is based on the reduced duty cycle.

[0078] In some examples, transmitting a data frame having a transmit power based on the modified SAR limit satisfies a time-averaged SAR limit associated with a second time interval that includes the first time interval based on the modified duty cycle.

[0079] In some examples, scheduling component 845 may be configured or otherwise support means for scheduling one or more frames for transmission during a first time interval according to a modified duty cycle, the one or more frames comprising a data frame.

[0080] In some examples, the reference signal component 825 may be configured or otherwise support components for receiving a second reference signal associated with measuring a signal strength between a first wireless device and a second wireless device. In some examples, the threshold component 830 may be configured or otherwise support components for determining that a second SAR limit for a second time interval is less than a second threshold, wherein the second threshold is greater than a threshold. In some examples, the SAR component 835 may be configured or otherwise support components for modifying a second SAR limit for a second time interval based on the signal strength failing to satisfy the signal strength threshold and the second SAR limit for the second time interval being less than the second threshold. In some examples, the duty cycle component 850 may be configured or otherwise support components for modifying a second duty cycle associated with the second time interval based on modifying the second SAR limit for the second time interval. In some examples, the frame component 840 may be configured or otherwise support components for transmitting a second data frame during the second time interval and according to a second duty cycle, the second data frame having a second transmit power based on the modified second SAR limit for the second time interval.

[0081] In some examples, based on the second threshold being greater than the threshold, the second transmit power of the second data frame is greater than the transmit power of the data frame. In some examples, based on the second transmit power of the second data frame being greater than the transmit power of the data frame, the second duty cycle is less than the duty cycle.

[0082] In some examples, to support modifying the SAR limit for the first time interval, SAR component 835 can be configured or otherwise support components for setting the SAR limit for the first time interval equal to a threshold value.

[0083] In some examples, the transmit power of the data frame is greater than a transmit power threshold associated with the unmodified SAR limit.

[0084] In some examples, the first wireless device is an AP and the second wireless device is a STA.

[0085] In some examples, the first wireless device is a STA and the second wireless device is an AP.

[0086] Additionally or alternatively, the communication manager 820 may support wireless communications at the first wireless device according to examples as disclosed herein. The scheduling component 845 may be configured to or otherwise support means for scheduling transmission of a control frame to the second wireless device. In some examples, the threshold component 830 may be configured to or otherwise support means for suspending a transmit power threshold associated with a SAR limit for communications between the first wireless device and the second wireless device based on the schedule. In some examples, the frame component 840 may be configured to or otherwise support means for transmitting a control frame having a transmit power greater than a transmit power threshold to the second wireless device based on suspending the transmit power threshold.

[0087] In some examples, the transmit power component 855 may be configured as or otherwise support components for determining the transmit power of a control frame based on a transmit power limit associated with a channel via which the control frame is transmitted, hardware capabilities of the first wireless device, or a combination thereof based on a pause transmit power threshold.

[0088] In some examples, the transmit power of the control frame is equal to the minimum of the transmit power limit and the hardware capability of the first wireless device.

[0089] In some examples, scheduling component 845 can be configured or otherwise support means for scheduling transmission of data frames to the second wireless device. In some examples, threshold component 830 can be configured or otherwise support means for recovering a transmit power threshold based on the scheduling of data frames. In some examples, frame component 840 can be configured or otherwise support means for transmitting a data frame having a second transmit power according to the transmit power threshold to the second wireless device based on recovering the transmit power threshold.

[0090] In some examples, the transmit power threshold is suspended based on a duration of the control frame being less than a threshold duration.

[0091] In some examples, the first wireless device is a STA and the second wireless device is an AP.

[0092] In some examples, the first wireless device is an AP and the second wireless device is a STA.

[0093] Fig. 9A diagram of a system including a device 905 supporting WLAN throughput and coverage with enhanced SAR according to one or more aspects of the present disclosure is shown. The device 905 may be an example of or may include components of the device 605, device 705, AP, or STA as described herein. The device 905 may include components for two-way voice and data communications, including components for sending and receiving communications, such as a communication manager 920, a network communication manager 910, a transceiver 915, an antenna 925, a memory 930, a code 935, a processor 940, an inter-AP communication manager 945, and an input / output (I / O) controller 950. These components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more buses (e.g., a bus 955).

[0094] The network communication manager 910 may manage communications with the core network (eg, via one or more wired backhaul links). For example, the network communication manager 910 may manage the transfer of data communications of client devices such as one or more STAs.

[0095] I / O controller 950 can manage input signals and output signals of device 905. I / O controller 950 can also manage peripheral devices that are not integrated into device 905. In some cases, I / O controller 950 can represent a physical connection or port to an external peripheral device. In some cases, I / O controller 950 can utilize an operating system such as or another known operating system. In some other cases, I / O controller 950 may represent or interact with a modem, keyboard, mouse, touch screen, or similar device. In some cases, I / O controller 950 may be implemented as part of a processor (such as processor 940). In some cases, a user may interact with device 905 via I / O controller 950 or via hardware components controlled by I / O controller 950.

[0096] In some cases, the device 905 may include a single antenna 925. However, in some other cases, the device 905 may have more than one antenna 925, which may be capable of concurrently transmitting or receiving multiple wireless transmissions. The transceiver 915 may communicate bidirectionally via one or more antennas 925, wired or wireless links, as described herein. For example, the transceiver 915 may represent a wireless transceiver and may communicate bidirectionally with another wireless transceiver. The transceiver 915 may also include a modem for modulating packets, and providing the modulated packets to one or more antennas 925 for transmission, and demodulating packets received from one or more antennas 925. The transceiver 915 or the transceiver 915 and one or more antennas 925 may be examples of transmitters 615, transmitters 715, receivers 610, receivers 710, or any combination thereof or components thereof as described herein.

[0097] The memory 930 may include random access memory (RAM) and read-only memory (ROM). The memory 930 may store computer-readable, computer-executable code 935 including instructions that, when executed by the processor 940, cause the device 905 to perform various functions described herein. In some cases, the memory 930 may also contain, among other things, a BIOS that may control basic hardware or software operations, such as interaction with peripheral components or devices.

[0098] The processor 940 may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof). In some cases, the processor 940 may be configured to operate a memory array using a memory controller. In some other cases, the memory controller may be integrated into the processor 940. The processor 940 may be configured to execute computer-readable instructions stored in a memory (e.g., a memory 930) to enable the device 905 to perform various functions (e.g., functions or tasks that support WLAN throughput and coverage with enhanced SAR). For example, the device 905 or a component of the device 905 may include a processor 940 and a memory 930 coupled to or coupled to the processor 940, and the processor 940 and the memory 930 are configured to perform the various functions described herein.

[0099] The inter-AP communication manager 945 may manage communications with other APs and may include a controller or scheduler for controlling communications with STAs 104 in coordination with other APs 102. For example, the inter-AP communication manager 945 may coordinate the scheduling of transmissions to the APs 102 for various interference mitigation techniques such as beamforming or joint transmissions. In some examples, the inter-AP communication manager 945 may provide an X2 interface within an LTE / LTE-A wireless communication network technology to provide communications between APs 102.

[0100] The communication manager 920 may support wireless communication at a first wireless device according to examples as disclosed herein. For example, the communication manager 920 may be configured to or otherwise support components for receiving a reference signal associated with measuring a signal strength between a first wireless device and a second wireless device. The communication manager 920 may be configured to or otherwise support components for determining that a SAR limit associated with communication between the first wireless device and the second wireless device for a first time interval is less than a threshold. The communication manager 920 may be configured to or otherwise support components for modifying a SAR limit for a first time interval based on the signal strength failing to satisfy a signal strength threshold and the SAR limit for the first time interval being less than the threshold. The communication manager 920 may be configured to or otherwise support components for transmitting a data frame during the first time interval, the data frame having a transmit power based on the modified SAR limit for the first time interval.

[0101] Additionally or alternatively, the communication manager 920 may support wireless communication at the first wireless device according to examples as disclosed herein. For example, the communication manager 920 may be configured to or otherwise support components for scheduling transmission of control frames to the second wireless device. The communication manager 920 may be configured to or otherwise support components for suspending a transmit power threshold associated with a SAR limit for communication between the first wireless device and the second wireless device based on the schedule. The communication manager 920 may be configured to or otherwise support components for transmitting a control frame having a transmit power greater than a transmit power threshold to the second wireless device based on suspending the transmit power threshold.

[0102] By including or configuring a communication manager 920 according to examples as described herein, the device 905 can support techniques for increased throughput, communication reliability, and WLAN coverage area, among other benefits.

[0103] Fig.10A flow chart illustrating a method 1000 for supporting WLAN throughput and coverage with enhanced SAR according to one or more aspects of the present disclosure is shown. The operations of the method 1000 may be implemented by an AP or a component thereof as described herein or a STA or a component thereof as described herein. For example, the operations of the method 1000 may be implemented by a STA or a component thereof as described herein. Figures 1 to 9 The AP or STA described herein may be executed by the AP or STA. In some examples, the AP or STA may execute an instruction set to control the functional elements of the AP or STA to perform the described functions. Additionally or alternatively, the AP or STA may use dedicated hardware to perform various aspects of the described functions.

[0104] At 1005, the method may include receiving a reference signal associated with measuring a signal strength between a first wireless device and a second wireless device. The operations of 1005 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1005 may be performed by reference to Figure 8 The reference signal component 825 is used to perform the above.

[0105] At 1010, the method may include determining that a SAR limit associated with communication between the first wireless device and the second wireless device for a first time interval is less than a threshold. The operations of 1010 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1010 may be performed as described in reference to Figure 8 The threshold component 830 is used to perform the above.

[0106] At 1015, the method may include modifying the SAR limit for the first time interval based on the signal strength failing to satisfy the signal strength threshold and the SAR limit for the first time interval being less than the threshold. The operations of 1015 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1015 may be performed as described in reference to Figure 8 The SAR component 835 is used to perform.

[0107] At 1020, the method may include transmitting a data frame during the first time interval, the data frame having a transmit power based on the modified SAR limit of the first time interval. The operations of 1020 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1020 may be performed as described in reference Figure 8 The frame component 840 is used to perform the above operation.

[0108] Fig.11 A flowchart illustrating a method 1100 for supporting WLAN throughput and coverage with enhanced SAR according to one or more aspects of the present disclosure is shown. The operations of the method 1100 may be implemented by an AP or components thereof as described herein. For example, the operations of the method 1100 may be implemented by an AP or components thereof as described herein. Figures 1 to 9In some examples, the AP may execute an instruction set to control the functional elements of the AP to perform the described functions. Additionally or alternatively, the AP may use dedicated hardware to perform various aspects of the described functions.

[0109] At 1105, the method may include receiving a reference signal associated with measuring a signal strength between a first wireless device and a second wireless device. The operations of 1105 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1105 may be performed by reference to Figure 8 The reference signal component 825 is used to perform the above.

[0110] At 1110, the method may include determining that a SAR limit associated with communications between the first wireless device and the second wireless device for a first time interval is less than a threshold. The operations of 1110 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1110 may be performed as described in reference to Figure 8 The threshold component 830 is used to perform the above.

[0111] At 1115, the method may include modifying the SAR limit for the first time interval based on the signal strength failing to satisfy the signal strength threshold and the SAR limit for the first time interval being less than the threshold. The operations of 1115 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1115 may be performed as described in reference to Figure 8 The SAR component 835 is used to perform.

[0112] At 1120, the method may include modifying a duty cycle associated with the first time interval based on modifying the SAR limit of the first time interval. The operations of 1120 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1120 may be performed as described in reference to Figure 8 The duty cycle component 850 is implemented.

[0113] At 1125, the method may include transmitting a data frame during the first time interval and according to the modified duty cycle, the data frame having a transmit power based on the modified SAR limit of the first time interval. The operations of 1125 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1125 may be performed as described in reference Figure 8 The frame component 840 is used to perform the above operation.

[0114] Fig.12 A flow chart illustrating a method 1200 for supporting WLAN throughput and coverage with enhanced SAR according to one or more aspects of the present disclosure is shown. The operations of the method 1200 may be implemented by an AP or components thereof as described herein. For example, the operations of the method 1200 may be implemented by an AP or components thereof as described herein. Figures 1 to 9In some examples, the AP may execute an instruction set to control the functional elements of the AP to perform the described functions. Additionally or alternatively, the AP may use dedicated hardware to perform various aspects of the described functions.

[0115] At 1205, the method may include receiving a reference signal associated with measuring a signal strength between a first wireless device and a second wireless device. The operations of 1205 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1205 may be performed by reference to Figure 8 The reference signal component 825 is used to perform the above.

[0116] At 1210, the method may include determining that a SAR limit associated with communications between the first wireless device and the second wireless device for a first time interval is less than a threshold. The operations of 1210 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1210 may be performed as described in reference to Figure 8 The threshold component 830 is used to perform the above.

[0117] At 1215, the method may include modifying the SAR limit for the first time interval based on the signal strength failing to satisfy the signal strength threshold and the SAR limit for the first time interval being less than the threshold. The operations of 1215 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1215 may be performed as described in reference to Figure 8 The SAR component 835 is used to perform.

[0118] At 1220, to support modifying the SAR limit, the method may include setting the SAR limit for the first time interval to be equal to the threshold. The operations of 1220 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1220 may be performed as described in reference to Figure 8 The SAR component 835 is used to perform.

[0119] At 1225, the method may include transmitting a data frame during the first time interval, the data frame having a transmit power based on the modified SAR limit of the first time interval. The operations of 1225 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1225 may be performed as described in reference Figure 8 The frame component 840 is used to perform the above operation.

[0120] Fig.13 A flowchart illustrating a method 1300 for supporting WLAN throughput and coverage with enhanced SAR according to one or more aspects of the present disclosure is shown. The operations of the method 1300 may be implemented by an AP or components thereof as described herein. For example, the operations of the method 1300 may be implemented by an AP or components thereof as described herein. Figures 1 to 9In some examples, the AP may execute an instruction set to control the functional elements of the AP to perform the described functions. Additionally or alternatively, the AP may use dedicated hardware to perform various aspects of the described functions.

[0121] At 1305, the method may include scheduling the transmission of the control frame to the second wireless device. The operations of 1305 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1305 may be performed as described in reference to Figure 8 The scheduling component 845 is used for execution.

[0122] At 1310, the method may include suspending a transmit power threshold associated with a SAR limit for communications between the first wireless device and the second wireless device based on the schedule. The operations of 1310 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1310 may be performed as described in reference to Figure 8 The threshold component 830 is used to perform the above.

[0123] At 1315, the method may include sending a control frame having a transmit power greater than the transmit power threshold to the second wireless device based on the suspend transmit power threshold. The operations of 1315 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1315 may be performed as described in reference to Figure 8 The frame component 840 is used to perform the above operation.

[0124] Fig.14 A flowchart illustrating a method 1400 for supporting WLAN throughput and coverage with enhanced SAR according to one or more aspects of the present disclosure is shown. The operations of the method 1400 may be implemented by an AP or components thereof as described herein. For example, the operations of the method 1400 may be implemented by an AP or components thereof as described herein. Figures 1 to 9 In some examples, the AP may execute an instruction set to control the functional elements of the AP to perform the described functions. Additionally or alternatively, the AP may use dedicated hardware to perform various aspects of the described functions.

[0125] At 1405, the method may include scheduling the transmission of the control frame to the second wireless device. The operations of 1405 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1405 may be performed as described in reference to Figure 8 The scheduling component 845 is used for execution.

[0126] At 1410, the method may include suspending a transmit power threshold associated with a SAR limit for communications between the first wireless device and the second wireless device based on the schedule. The operations of 1410 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1410 may be performed as described in reference to Figure 8The threshold component 830 is used to perform the above.

[0127] At 1415, the method may include determining a transmit power of the control frame based on a transmit power limit associated with a channel via which the control frame is transmitted, a hardware capability of the first wireless device, or a combination thereof based on the suspend transmit power threshold. The operations of 1415 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1415 may be performed as described in reference to Figure 8 The sending power component 855 is used to perform the operation.

[0128] At 1420, the method may include sending a control frame having a transmit power greater than the transmit power threshold to the second wireless device based on the suspend transmit power threshold. The operations of 1420 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1420 may be performed as described in reference to Figure 8 The frame component 840 is used to perform the above operation.

[0129] Fig.15 A flowchart illustrating a method 1500 for supporting WLAN throughput and coverage with enhanced SAR according to one or more aspects of the present disclosure is shown. The operations of the method 1500 may be implemented by an AP or components thereof as described herein. For example, the operations of the method 1500 may be implemented by an AP or components thereof as described herein. Figures 1 to 9 In some examples, the AP may execute an instruction set to control the functional elements of the AP to perform the described functions. Additionally or alternatively, the AP may use dedicated hardware to perform various aspects of the described functions.

[0130] At 1505, the method may include scheduling the transmission of the control frame to the second wireless device. The operations of 1505 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1505 may be performed as described in reference to Figure 8 The scheduling component 845 is used for execution.

[0131] At 1510, the method may include suspending a transmit power threshold associated with a SAR limit for communications between the first wireless device and the second wireless device based on the schedule. The operations of 1510 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1510 may be performed as described in reference to Figure 8 The threshold component 830 is used to perform the above.

[0132] At 1515, the method may include sending a control frame having a transmit power greater than the transmit power threshold to the second wireless device based on the suspend transmit power threshold. The operations of 1515 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1515 may be performed as described in reference to Figure 8The frame component 840 is used to perform the above operation.

[0133] At 1520, the method may include scheduling the transmission of the data frame to the second wireless device. The operations of 1520 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1520 may be performed as described in reference to Figure 8 The scheduling component 845 is used for execution.

[0134] At 1525, the method may include recovering the transmit power threshold based on the scheduling of the data frame. The operations of 1525 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1525 may be performed as described in reference Figure 8 The threshold component 830 is used to perform the above.

[0135] At 1530, the method may include, based on the restored transmit power threshold, transmitting a data frame having a second transmit power according to the transmit power threshold to the second wireless device. The operations of 1530 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1530 may be performed as described in reference to Figure 8 The frame component 840 is used to perform the above operation.

[0136] (The inventive content supporting multiple dependent claims will be added after the claims are finally approved)

[0137] It should be noted that the methods described herein describe possible implementations, and that the operations and steps may be rearranged or otherwise modified and other implementations are possible. In addition, aspects from two or more of the methods may be combined.

[0138] The technology described herein can be used for various wireless communication systems, such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal frequency division multiple access (OFDMA), single carrier frequency division multiple access (SC-FDMA) and other systems. The terms "system" and "network" are often used interchangeably. Code division multiple access (CDMA) systems can implement radio technologies such as CDMA2000, Universal Terrestrial Radio Access (UTRA). CDMA2000 covers IS-2000, IS-95 and IS-856 standards. IS-2000 versions are commonly referred to as CDMA20001X, 1X, etc. IS-856 (TIA-856) is commonly referred to as CDMA2000 1xEV-DO, High Speed ​​Packet Data (HRPD), etc. UTRA includes Wideband CDMA (WCDMA) and other variants of CDMA. Time division multiple access (TDMA) systems can implement radio technologies such as Global System for Mobile Communications (GSM). An Orthogonal Frequency Division Multiple Access (OFDMA) system may implement radio technologies such as Ultra Mobile Broadband (UMB), Evolved UTRA (E-UTRA), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, and others.

[0139] One or more wireless communication systems described herein may support synchronous or asynchronous operation. For synchronous operation, each station may have similar frame timing, and transmissions from different stations may be approximately aligned in time. For asynchronous operation, each station may have different frame timing, and transmissions from different stations may not be aligned in time. The techniques described herein may be used for synchronous or asynchronous operation.

[0140] The downlink transmission described herein may also be referred to as forward link transmission, and the uplink transmission may also be referred to as reverse link transmission. Each communication link described herein, for example, includes Figures 1 to 5 The WLANs 100, 200, 300, 400, and 500 may include one or more carriers, wherein each carrier may be a signal composed of a plurality of subcarriers (eg, waveform signals of different frequencies).

[0141] The descriptions set forth herein in conjunction with the accompanying drawings describe example configurations and do not represent all examples that may be implemented or within the scope of the claims. The term "exemplary" as used herein means "used as an example, instance, or illustration," and does not mean "better than" or "better than other examples." The detailed description includes specific details to provide an understanding of the described techniques. However, these techniques may be practiced without these specific details. In some cases, in order to avoid obscuring the concepts of the described examples, well-known structures and devices are shown in block diagram form.

[0142] In the drawings, similar components or features may have the same reference label. In addition, various components of the same type may be distinguished by following the reference label with a dash and a second label to distinguish between the similar components. If only the first reference label is used in the specification, the description applies to any one of the similar components having the same first reference label, regardless of the second reference label.

[0143] The information and signals described herein may be represented using any of a variety of different technologies and methods. For example, data, instructions, commands, information, signals, bits, symbols, and chips mentioned throughout the specification may be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or optical particles, or any combination thereof.

[0144] The various illustrative blocks and modules described in conjunction with the disclosure herein may be implemented or executed using a general purpose processor, a DSP, an ASIC, an FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, but in an alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration).

[0145] The functions described herein can be implemented in hardware, software executed by a processor, firmware, or any combination thereof. When implemented in software executed by a processor, the functions can be stored as one or more instructions or codes on a computer-readable medium, or sent via a computer-readable medium. Other examples and specific implementations are within the scope of the present disclosure and the appended claims. For example, due to the nature of software, the functions described herein can be implemented using software executed by a processor, hardware, firmware, hard wiring, or a combination of any of these items. The features that implement the functions can also be physically located at different locations, including being distributed so that the parts of the functions are implemented at different physical locations. In addition, as used herein (including in the claims), the "or" used in the enumeration of items (e.g., the enumeration of items ending with words such as "at least one of" or "one or more of") indicates inclusive enumeration, so that, for example, the enumeration of at least one of A, B, or C means: A or B or C or AB or AC or BC or ABC (such as A and B and C). In addition, as used herein, the phrase "based on" should not be interpreted as a reference to a closed conditional set. For example, without departing from the scope of the present disclosure, an exemplary step described as "based on condition A" may be based on both condition A and condition B. In other words, as used herein, the phrase "based on" should be interpreted in the same manner as the phrase "based at least in part on."

[0146] Computer-readable media include both non-transient computer storage media and communication media, including any medium that facilitates the transfer of computer programs from one place to another.Non-transient storage media can be any available medium that can be accessed by a general or special-purpose computer.By way of example and not limitation, non-transient computer-readable media may include RAM, ROM, electrically erasable programmable read-only memory (EEPROM), compact disk (CD) ROM or other optical disk storage, disk storage or other magnetic storage devices, or any other non-transient medium that can be used to carry or store the desired program code means of instruction or data structure form and can be accessed by a general or special-purpose computer or a general or special-purpose processor.Moreover, any connection is appropriately referred to as computer-readable media.For example, if software is sent from a website, server or other remote source using 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, digital subscriber line (DSL) or wireless technologies such as infrared, radio and microwave are included in the definition of medium. Disk and disc, as used herein, includes 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.

[0147] The description herein is provided to enable those skilled in the art to implement or use the present disclosure. Various modifications to the present disclosure will be apparent to those skilled in the art, and the general principles defined herein may be applied to other variations without departing from the scope of the present disclosure. Therefore, the present disclosure is not limited to the examples and designs described herein, but conforms to the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for wireless communication at a first wireless device, the method comprising: receiving a reference signal associated with measuring a signal strength between the first wireless device and a second wireless device; determining that a specific absorption rate limit associated with communications between the first wireless device and the second wireless device for a first time interval is less than a threshold; modifying the specific absorption rate limit for the first time interval based at least in part on the signal strength failing to satisfy a signal strength threshold and the specific absorption rate limit for the first time interval being less than the threshold; as well as A data frame is transmitted during the first time interval, the data frame having a transmit power based at least in part on the modified specific absorption rate limit for the first time interval.

2. The method of claim 1, further comprising modifying a duty cycle associated with the first time interval based at least in part on modifying the specific absorption rate limit of the first time interval, wherein the data frame is transmitted according to the modified duty cycle.

3. The method of claim 2 , wherein modifying the duty cycle comprises reducing the duty cycle to reduce a duration of the first time interval during which the first wireless device transmits a signal to the second wireless device, wherein a duration of the data frame is based at least in part on the reduced duty cycle.

4. The method of claim 2, wherein transmitting the data frame having the transmit power based at least in part on the modified specific absorption rate limit satisfies a time-averaged specific absorption rate limit associated with a second time interval, the second time interval comprising the first time interval based at least in part on modifying the duty cycle.

5. The method of claim 2, further comprising scheduling one or more frames for transmission during the first time interval according to the modified duty cycle, the one or more frames comprising the data frame.

6. The method according to claim 2, further comprising: receiving a second reference signal associated with measuring the signal strength between the first wireless device and the second wireless device; determining that a second specific absorption rate limit for a second time interval is less than a second threshold, wherein the second threshold is greater than the threshold; modifying the second specific absorption rate limit for the second time interval based at least in part on the signal strength failing to satisfy the signal strength threshold and the second specific absorption rate limit for the second time interval being less than the second threshold; modifying a second duty cycle associated with the second time interval based at least in part on modifying the second specific absorption rate limit of the second time interval; as well as A second data frame is transmitted during the second time interval and according to the second duty cycle, the second data frame having a second transmit power based at least in part on a modified second specific absorption rate limit of the second time interval.

7. The method according to claim 6, wherein: Based at least in part on the second threshold being greater than the threshold, the second transmit power of the second data frame is greater than the transmit power of the data frame, and The second duty cycle is less than the duty cycle based at least in part on the second transmit power of the second data frame being greater than the transmit power of the data frame.

8. The method of claim 1, wherein modifying the SAR limit for the first time interval comprises setting the SAR limit for the first time interval equal to the threshold value.

9. The method of claim 1, wherein the transmit power of the data frame is greater than a transmit power threshold associated with an unmodified specific absorption rate limit.

10. The method of claim 1, wherein the first wireless device is an access point and the second wireless device is a station.

11. The method of claim 1, wherein the first wireless device is a station and the second wireless device is an access point.

12. A method for wireless communication at a first wireless device, the method comprising: Scheduling transmission of a control frame to a second wireless device; Based at least in part on the schedule, suspending a transmit power threshold associated with a specific absorption rate limit for communications between the first wireless device and the second wireless device; and Based at least in part on suspending the transmit power threshold, transmitting the control frame having a transmit power greater than the transmit power threshold to the second wireless device.

13. The method according to claim 12, further comprising: The transmit power of the control frame is determined based at least in part on suspending the transmit power threshold according to a transmit power limit associated with a channel via which the control frame is transmitted, hardware capabilities of the first wireless device, or a combination thereof.

14. The method of claim 13, wherein the transmit power of the control frame is equal to a minimum of the transmit power limit and the hardware capability of the first wireless device.

15. The method according to claim 12, further comprising: scheduling transmission of data frames to the second wireless device; recovering the transmit power threshold based at least in part on the scheduling of the data frames; as well as Based at least in part on restoring the transmit power threshold, transmitting the data frame to the second wireless device with a second transmit power according to the transmit power threshold.

16. The method of claim 12, wherein the transmit power threshold is suspended based at least in part on a duration of the control frame being less than a threshold duration.

17. The method of claim 12, wherein the first wireless device is a station and the second wireless device is an access point.

18. The method of claim 12, wherein the first wireless device is an access point and the second wireless device is a station.

19. An apparatus for wireless communication at a first wireless device, the apparatus comprising: processor; and A memory coupled to the processor and storing instructions executable by the processor to cause the apparatus to perform the following operations: receiving a reference signal associated with a measurement of a signal strength between the first wireless device and a second wireless device; determining that a specific absorption rate limit associated with communications between the first wireless device and the second wireless device for a first time interval is less than a threshold; modifying the specific absorption rate limit for the first time interval based at least in part on the signal strength failing to satisfy a signal strength threshold and the specific absorption rate limit for the first time interval being less than the threshold; as well as A data frame is transmitted during the first time interval, the data frame having a transmit power based at least in part on the modified specific absorption rate limit for the first time interval.

20. The apparatus of claim 19, wherein the instructions are further executable by the processor to cause the apparatus to modify a duty cycle associated with the first time interval based at least in part on the modification of the specific absorption rate limit of the first time interval, wherein the data frame is sent according to the modified duty cycle.

21. An apparatus according to claim 20, wherein the instruction to modify the duty cycle is executable by the processor to cause the apparatus to reduce the duty cycle to reduce the duration of the first time interval in which the first wireless device sends a signal to the second wireless device, wherein the duration of the data frame is at least partially based on the reduced duty cycle.

22. An apparatus according to claim 20, wherein the transmission of the data frame having the transmission power based at least in part on the modified specific absorption rate limit satisfies a time-averaged specific absorption rate limit associated with a second time interval, the second time interval including the first time interval based at least in part on the modification of the duty cycle.

23. The apparatus of claim 20, wherein the instructions are further executable by the processor to cause the apparatus to schedule one or more frames for transmission during the first time interval according to the modified duty cycle, the one or more frames comprising the data frame.

24. The apparatus of claim 20, wherein the instructions are further executable by the processor to cause the apparatus to: receiving a second reference signal associated with a measurement of the signal strength between the first wireless device and the second wireless device; determining that a second specific absorption rate limit for a second time interval is less than a second threshold, wherein the second threshold is greater than the threshold; modifying the second specific absorption rate limit for the second time interval based at least in part on the signal strength failing to satisfy the signal strength threshold and the second specific absorption rate limit for the second time interval being less than the second threshold; modifying a second duty cycle associated with the second time interval based at least in part on the modification of the second specific absorption rate limit for the second time interval; and transmitting a second data frame during the second time interval and according to the second duty cycle, the second data frame having a second transmit power based at least in part on a modified second specific absorption rate limit for the second time interval.

25. The apparatus of claim 24, wherein: Based at least in part on the second threshold being greater than the threshold, the second transmit power of the second data frame is greater than the transmit power of the data frame, and The second duty cycle is less than the duty cycle based at least in part on the second transmit power of the second data frame being greater than the transmit power of the data frame.

26. The apparatus of claim 19, wherein the instructions to modify the SAR limit for the first time interval are executable by the processor to cause the apparatus to set the SAR limit for the first time interval equal to the threshold.

27. An apparatus for wireless communication at a first wireless device, the apparatus comprising: processor; and A memory coupled to the processor and storing instructions executable by the processor to cause the apparatus to perform the following operations: Scheduling transmission of a control frame to a second wireless device; Based at least in part on the schedule, suspending a transmit power threshold associated with a specific absorption rate limit for communications between the first wireless device and the second wireless device; and Based at least in part on suspending the transmit power threshold, transmitting the control frame having a transmit power greater than the transmit power threshold to the second wireless device.

28. An apparatus according to claim 27, wherein the instructions are also executable by the processor to cause the apparatus to: determine the transmit power of the control frame based at least in part on the suspension of the transmit power threshold, according to a transmit power limit associated with a channel via which the control frame is transmitted, hardware capabilities of the first wireless device, or a combination thereof.

29. The apparatus of claim 28, wherein the transmit power of the control frame is equal to a minimum of the transmit power limit and the hardware capability of the first wireless device.

30. The apparatus of claim 27, wherein the instructions are further executable by the processor to cause the apparatus to: scheduling transmission of data frames to the second wireless device; recovering the transmit power threshold based at least in part on the scheduling of the data frames; and Based at least in part on restoring the transmit power threshold, transmitting the data frame to the second wireless device with a second transmit power according to the transmit power threshold.

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