Dynamic transmit power control

Abstract

This disclosure provides methods, components, apparatus, and systems for dynamic transmit power control. Some aspects more specifically relate to dynamically enabling transmit power during a transmit opportunity (TxOP) to minimize the transmit power used for message transmission. In some specific embodiments, a wireless device can transmit a first message at a first transmit power, the first message indicating that the wireless device will transmit one or more second messages during the TxOP. The wireless device can select a second transmit power and a plurality of transmit parameters for the second messages, wherein the second transmit power satisfies a metric for the one or more second messages. The wireless device can transmit the second message at the second transmit power during the TxOP based on the corresponding values ​​of the plurality of transmit parameters.

Description

Cross-references to related applications

[0001] This patent application claims the benefit of U.S. Patent Application No. 18 / 503,943, entitled “DYNAMICTRANSMIT POWER CONTROL”, filed November 7, 2023, by Asterjadhi et al., which has been assigned to the assignee of this patent application. Technical Field

[0002] This disclosure relates to wireless communications, and more specifically to dynamic transmit power control. Background Technology

[0003] A Wireless Local Area Network (WLAN) can be formed by one or more wireless access points (APs) that provide a shared wireless communication medium for use by multiple client devices (also known as wireless stations (STAs)). The basic building block of a WLAN conforming to the IEEE 802.11 family of standards is the Basic Service Set (BSS) managed by the AP. Each BSS is identified by a Basic Service Set Identifier (BSSID) advertised by the AP. The AP periodically broadcasts beacon frames to enable any STA within the AP's wireless range to establish or maintain a communication link with the WLAN.

[0004] Wireless networks can employ various methods to minimize the power consumption of wireless devices. For example, AP power-saving operations can be supported within the wireless network to minimize the amount of power consumed by APs (such as mobile APs) during wireless communication. Similar or other techniques can be applied to STAs operating within the wireless network. Minimizing power consumption can improve the battery performance of mobile wireless devices (such as extending battery life), reduce equipment costs, and lower operating costs and the burden on equipment operators.

[0005] To support this type of wireless communication, various transmission parameters can be optimized for wireless transmission. For example, the transmitting device can select the modulation and decoding scheme, bandwidth, number of spatial streams, and other transmission parameters used for wireless transmission. Generally, these transmission parameters can be selected to maximize the data rate (throughput) of the wireless network using the maximum available transmission power level. Typically, the maximum available transmission power level is set by the wireless network based on the maximum permissible energy that can be transmitted through the wireless medium, or otherwise controlled. Summary of the Invention

[0006] The systems, methods, and apparatus disclosed herein each have some innovative aspects, and no single aspect is solely responsible for the desired properties disclosed herein.

[0007] One innovative aspect of the subject matter described in this disclosure can be implemented in a method for wireless communication by a wireless device. The method may include: transmitting a first message at a first transmission power, the first message indicating that the wireless device will transmit one or more second messages during a transmission opportunity; and transmitting the one or more second messages during the transmission opportunity at a second transmission power according to corresponding values ​​of a set of multiple transmission parameters, wherein the second transmission power satisfies a metric for the one or more second messages.

[0008] Another innovative aspect of the subject matter described in this disclosure can be implemented in a wireless device for wireless communication. The wireless device may include a processing system comprising processor circuitry and memory circuitry storing code. The processing system may be configured to cause the wireless device to: transmit a first message at a first transmission power, the first message indicating that the wireless device will transmit one or more second messages during a transmission opportunity; and transmit the one or more second messages during the transmission opportunity at a second transmission power according to corresponding values ​​of a set of multiple transmission parameters, wherein the second transmission power satisfies a metric for the one or more second messages.

[0009] Another innovative aspect of the subject matter described in this disclosure can be implemented in a wireless device for wireless communication. The wireless device may include: components for transmitting a first message at a first transmission power, the first message indicating that the wireless device will transmit one or more second messages during a transmission opportunity; and components for transmitting the one or more second messages during the transmission opportunity at a second transmission power according to corresponding values ​​of a set of multiple transmission parameters, wherein the second transmission power satisfies a metric for the one or more second messages.

[0010] Another innovative aspect of the subject matter described in this disclosure can be implemented in a non-transitory computer-readable medium storing code for wireless communication. This code may include instructions executable by a processor to: transmit a first message at a first transmission power, the first message instructing a wireless device to transmit one or more second messages during a transmission opportunity; and transmit the one or more second messages during the transmission opportunity at a second transmission power according to corresponding values ​​of a set of multiple transmission parameters, wherein the second transmission power satisfies a metric for the one or more second messages.

[0011] Some examples of the methods, wireless devices, and nontransitory computer-readable media described herein may also include operations, features, components, or instructions for: selecting a second transmit power and a set of multiple transmit parameters for one or more second messages; selecting an optimized value for one or more transmit parameters from the set of multiple transmit parameters, wherein the optimized value can be based on the availability of the wireless channel and the operating mode or capability of the receiving device to which one or more second messages may be intended; and selecting a second transmit power after selecting the optimized value.

[0012] Some examples of the methods, wireless devices, and nontransitory computer-readable media described herein may also include operations, features, components, or instructions for: selecting a second transmission power and a set of multiple transmission parameters for one or more second messages; and selecting an optimized value for a combination of one or more transmission parameters with the second transmission power from the set of multiple transmission parameters, wherein the optimized value may be optimized with respect to one or more of minimum energy consumption, space reuse opportunities, and protection of transmission opportunities.

[0013] Some examples of the methods, wireless devices, and nontransitory computer-readable media described herein may also include operations, features, components, or instructions for: selecting a second transmission power and a set of multiple transmission parameters for one or more second messages; determining a minimum second transmission power based on an energy consumption metric and a corresponding value of the set of multiple transmission parameters; and selecting a second transmission power based on the minimum second transmission power and a Δ value.

[0014] The methods, wireless devices, and some examples of nontransitory computer-readable media described herein may also include operations, features, components, or instructions for: selecting a second transmit power and a set of multiple transmit parameters for one or more second messages; and selecting the second transmit power based on the path loss value of the channel between the wireless device and a receiving device that may receive one or more second messages.

[0015] In some examples of the methods, wireless devices, and nontransitory computer-readable media described herein, the first transmission power may be greater than the second transmission power.

[0016] Details of one or more specific embodiments of the subject matter described in this disclosure are set forth in the accompanying drawings and the description below. Other features, aspects, and advantages will become apparent from the description, drawings, and claims. Note that the relative dimensions in the following drawings may not be drawn to scale. Attached Figure Description

[0017] Figure 1 A schematic diagram of an example wireless communication network is shown.

[0018] Figure 2An example Protocol Data Unit (PDU) is shown that can be used for communication between a wireless access point (AP) and one or more wireless stations (STA).

[0019] Figure 3 An example physical layer (PHY) protocol data unit (PPDU) capable of being used for communication between a wireless AP and one or more wireless STAs is shown.

[0020] Figure 4 A schematic diagram of another example wireless communication network is shown.

[0021] Figure 5 An example of a wireless network that supports dynamic transmit power control is shown.

[0022] Figure 6 An example of a signaling diagram supporting dynamic transmit power control is shown.

[0023] Figure 7 An example of a signaling diagram supporting dynamic transmit power control is shown.

[0024] Figure 8 A block diagram of an example wireless communication device that supports dynamic transmit power control is shown.

[0025] Figure 9 A flowchart illustrating an example process that can be performed by or at a wireless device that supports dynamic transmit power control is shown.

[0026] The same reference numerals and names in the various figures indicate the same elements. Detailed Implementation

[0027] The following description refers to certain specific examples in order to illustrate the innovative aspects of this disclosure. However, those skilled in the art will readily recognize that the teachings herein can be applied in a variety of different ways. Some or all of the examples described can be applied in Bluetooth systems that meet the requirements of the Institute of Electrical and Electronics Engineers (IEEE) 802.11, IEEE 802.15, or Bluetooth as defined by the Bluetooth Special Interest Group (SIG). ®This can be implemented in any device, system, or network that transmits and receives radio frequency (RF) signals according to one or more of the following standards, or those published by the 3rd Generation Partnership Project (3GPP): Long Term Evolution (LTE), 3G, 4G, or 5G (New Radio (NR)). The described examples can be implemented in any device, system, or network capable of transmitting and receiving RF signals according to one or more of the following technologies or techniques: Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Orthogonal Frequency Division Multiplexing (OFDM), Frequency Division Multiple Access (FDMA), Orthogonal FDMA (OFDMA), Single Carrier FDMA (SC-FDMA), Space Division Multiple Access (SDMA), Rate Split Multiple Access (RSMA), Multi-User Shared Access (MUSA), Single-User (SU) Multiple-Input Multiple-Output (MIMO), and Multi-User (MU)-MIMO (MU-MIMO). The described examples can also be implemented using other wireless communication protocols or RF signals suitable for use in one or more of the following networks: Wireless Personal Area Network (WPAN), Wireless Local Area Network (WLAN), Wireless Wide Area Network (WWAN), Wireless Metropolitan Area Network (WMAN), or Internet of Things (IoT).

[0028] Wireless devices typically employ various transmission parameters to configure and transmit wireless signals. These transmissions propagate across a wireless medium that affects the wireless signal to some extent, such as by degrading the signal, shifting the signal, or causing other interference. Such interactions are generally described as path loss of the wireless medium and can be measured or otherwise determined as interference levels, received signal strength, throughput levels, etc. To address this issue, wireless devices select and apply transmission parameters designed to at least partially overcome these degrading components of the wireless medium to ensure reception of the wireless signal. However, the power level at which a device transmits wireless signals (e.g., transmit power) is often fixed or otherwise configured by the network based on fixed standards or other regulatory considerations. This approach can waste resources, such as power and transmission opportunities, such as when the transmitting device is near the receiver or otherwise has the optimal wireless medium available.

[0029] Various aspects generally relate to dynamic transmit power control operations at the wireless device. Some aspects more specifically relate to implementing dynamic transmit power control at the transmitting device, and in some implementations at the receiving device. In some implementations, the wireless device (the transmitting device, such as a STA, mobile AP, or other unattached or mobile wireless device) can acquire a channel within a Transmit Opportunity (TxOP). The wireless device can perform a channel clearing process to sense the channel over a specific duration. If the channel is determined to be available, the transmitting device can send a first message indicating an upcoming data transmission (one or more second messages) during the TxOP. The first message can be used to reserve the channel, such as by carrying or otherwise conveying an indication that the channel will be used for wireless communication during the TxOP.

[0030] The first message can be transmitted at a first transmit power (such as maximum available transmit power). Maximum available transmit power typically refers to the maximum transmit power that the transmitting device can use to transmit the first message, within the range applicable guidelines and regulations. Transmitting the first message at maximum available transmit power improves the reliability of the first message, ensuring that the receiving device is ready to respond and participate in wireless communication during the TxOP. Additionally, transmitting the first message at maximum available transmit power maximizes the transmission range of the first message. In some specific implementations, the first message may be a request to transmit (RTS) message transmitted at the beginning of the TxOP. Additionally or alternatively, the first message may be any other control frame, such as BlockAckReq, any variant of a trigger frame (e.g., a MU RTS trigger frame), etc. In some implementations, the first message can be transmitted in a non-HT (replicated) PPDU, allowing the frame to be decoded by all third-party STAs within the transmitter's range, since non-HT (replicated) PPDUs require decoding by all legacy STAs, and the PSDU in a non-HT replicated PPDU is replicated on multiple 20MHz sub-channels of the PPDU's BW, which in turn improves the reliability of the PPDU.

[0031] The wireless device can then select a second transmission power for one or more second messages based on transmission parameters (modulation and decoding scheme, available bandwidth, PPDU type, use of LDPC, use of mid-signal, replication mode, preamble puncturing, guard interval, etc.) and a second transmission power. In some implementations, the second transmission power can be based on an energy consumption metric, which typically indicates the minimum or lowest transmission power at which the second message can be transmitted to achieve the metric. That is, among other transmission parameters, the wireless device can also use a transmission power for the second message that is the minimum amount of transmission power that the device can use and still achieve sufficiently reliable transmission. The second transmission power can be selected as the minimum amount of transmission power that can be used to reliably transmit the second message across the wireless medium. Therefore, the performance of the wireless medium can be used to select the second transmission power. For example, wireless devices close to each other can be able to perform wireless communication with a lower transmission power than wireless devices farther apart. In some implementations, the second transmission power can be based on the type of TxOP, such as a NAV-protected TxOP or a spatially reused TxOP.

[0032] The second transmit power can be selected using different techniques. One non-limiting technique is for the transmitting device to select the highest available (optimized) transmit parameters (such as decoding scheme, bandwidth, and other parameters) that minimize the duration of the PDU carrying the second message. The second transmit power can then be selected such that, given the previously selected transmit parameters, the second message can be transmitted with sufficient reliability. Another technique is for the transmitting device to initially optimize both the transmit parameters and the second transmit power. That is, in this second approach, the second transmit power is optimized in conjunction with other transmit parameters, rather than being optimized retrospectively. Both techniques can limit the amount of wireless signal propagated by the transmitting device into the wireless medium.

[0033] A wireless device may transmit a second message at a second transmit power during a TxOP. For example, the second message may include data messages, such as Protocol Data Unit (PDU) data communicated during the TxOP. In some implementations, a TxOP may include one or more messages sent from a transmitting device (TxOP holder) to a receiving device (TxOP responder) and one or more messages sent from the receiving device to the transmitting device. The receiving device may select the transmit power used for its message transmission during the TxOP based on the second transmit power. That is, both the transmitting and receiving devices may minimize the transmit power of the PDU messages exchanged during the TxOP to minimize the amount of wireless signal transmitted into the wireless medium. In some implementations, the transmitting device may transmit a first portion (such as a header) of the second message at the maximum available transmit power, and then transmit the remainder of the second message at the second transmit power.

[0034] The receiving device can send an acknowledgment message to the transmitting device upon completion of PDU exchange. The acknowledgment message confirms which MPDUs (Multi-Port Data Units) within one or more data packets (MPDUs) contained in the PDU have been successfully received. The acknowledgment message can be one or both of an ACK frame or a block ACK frame. An ACK frame can indicate information confirming or otherwise verifying the reception of the PDU. An ACK frame can be a block ACK frame that indicates the PDU status of each PDU within the aggregated PDU via a bitmap (such as a "1" for successful reception or a "0" for failure). Acknowledgment messages can be sent at the maximum available transmit power.

[0035] Specific aspects of the subject matter described in this disclosure can be implemented to achieve one or more of the following potential advantages. In some specific implementations, dynamic transmit power control can enable the minimization of wireless radiation within a wireless network. Selecting the lowest transmit power to ensure successful PDU delivery can support the successful delivery of PDUs with specific reliability requirements, such as target packet error rate. The described techniques allow wireless devices located close to each other to exchange data during TxOP at a lower transmit power than would be used for wireless devices located further apart. Transmitting the first message (and the response to the first message) at the maximum available transmit power allows wireless devices to better estimate channel conditions (especially such as maximum coverage) to improve mobility, reduce erroneous roaming conditions, and improve NAV protection, which can improve the second transmit power selection made by the wireless device.

[0036] In some specific implementations, transmitting the first part of the second message at maximum or second transmission power can achieve NAV protection for the TxOP and improve spatial reuse within the TxOP. The described techniques can be used to avoid resource waste by minimizing interference introduced into the wireless environment associated with excessive wireless signals. The described techniques can improve TxOP management by implementing dynamic transmission power control to protect the Network Allocation Vector (NAV) of the TxOP and providing spatial reuse protection.

[0037] Figure 1A schematic diagram of an example wireless communication network 100 is shown. Depending on some aspects, the wireless communication network 100 may be an example of a wireless local area network (WLAN) (such as a Wi-Fi network). For example, the wireless communication network 100 may be a network implementing at least one of the IEEE 802.11 wireless communication protocol standard families (such as those defined by the IEEE 802.11-2020 specification or its revisions, including but not limited to 802.11ay, 802.11ax, 802.11az, 802.11ba, 802.11bd, 802.11be, 802.11bf, and 802.11bn). In some other examples, the wireless communication network 100 may be an example of a cellular radio access network (RAN), such as a 5G RAN or 6G RAN implementing one or more cellular protocols (such as those specified in one or more 3GPP standards). In some other examples, the wireless communication network 100 may include a WLAN that operates in an interoperable or converged manner with one or more cellular RANs to provide greater or enhanced network coverage to wireless communication devices within the wireless communication network 100, or to enable these devices to connect to the core of the cellular network, such as to access network management capabilities and functionality provided by the cellular network core.

[0038] The wireless communication network 100 may include numerous wireless communication devices, including at least one wireless access point (AP) 102 and any number of wireless stations (STA) 104. Although Figure 1 Only one AP 102 is shown, but the wireless communication network 100 may include multiple APs 102. AP 102 may be or represent various different types of network entities, including but not limited to home networking APs, enterprise APs, single-band APs, dual-band synchronous (DBS) APs, tri-band synchronous (TBS) APs, standalone APs, non-standalone APs, software-enabled APs (software APs), and multi-link APs (also known as AP multi-link devices (MLDs)), as well as cellular (such as 3GPP, 4G LTE, 5G, or 6G) base stations or other cellular network nodes (such as Node B, evolved Node B (eNB), gNB, Transmit Receive Point (TRP)) or another type of equipment or apparatus included in the radio access network (RAN), including open RAN (O-RAN) network entities such as central units (CUs), distributed units (DUs), or radio units (RUs).

[0039] Each STA in STA 104 may also be referred to as a mobile station (MS), mobile device, mobile phone, wireless phone, access terminal (AT), user equipment (UE), subscriber station (SS), or subscriber unit, etc. STA 104 can represent a variety of devices such as mobile phones, other handheld or wearable communication devices, netbooks, laptops, tablets, laptops, Chromebooks, augmented reality (AR), virtual reality (VR), mixed reality (MR), or extended reality (XR) wireless headsets or other peripherals, wireless earbuds, other wearable devices, display devices (e.g., televisions, computer monitors, or video game consoles), video game controllers, navigation systems, music or other audio or stereo devices, remote control devices, printers, kitchen appliances (including smart refrigerators) or other home appliances, remote keys (e.g., for passive keyless entry and start (PKES) systems), Internet of Things (IoT) devices, vehicles, etc.

[0040] A single AP 102 and its associated set of STA 104s may be referred to as a Basic Service Set (BSS), which is managed by the respective AP 102. Figure 1 An example coverage area 108 of AP 102 is also shown, which may represent the Basic Service Area (BSA) of wireless communication network 100. The BSA can be identified by STA 104 and other devices through a Service Set Identifier (SSID) and a Basic Service Set Identifier (BSSID), which may be the Media Access Control (MAC) address of AP 102. AP 102 may periodically broadcast beacon frames (“beacons”) including the BSSID to enable any STA 104 within the wireless range of AP 102 to “associate” or reassociate with AP 102 to establish or maintain a corresponding communication link 106 (also referred to hereinafter as a “Wi-Fi link”) with AP 102. For example, the beacon may include an identifier or indication of the primary channel used by the corresponding AP 102, and a Timing Synchronization Function (TSF) for establishing or maintaining timing synchronization with AP 102. AP 102 can provide access to external networks to various STAs 104 in the wireless communication network 100 via the corresponding communication link 106.

[0041] To establish a communication link 106 with AP 102, each STA 104 is configured to perform a passive or active scanning operation (“scan”) on frequency channels in one or more frequency bands (e.g., 2.4 GHz, 5 GHz, 6 GHz, 45 GHz, or 60 GHz bands). To perform a passive scan, STA 104 listens for beacons transmitted by the corresponding AP 102 at periodic time intervals called Target Beacon Transmission Time (TBTT). To perform an active scan, STA 104 generates probe requests and transmits these probe requests sequentially on each channel to be scanned, and listens for probe responses from AP 102. Each STA 104 can identify, determine, detect, or select an AP 102 to associate with based on the scanning information obtained through passive or active scanning, and perform authentication and association operations to establish a communication link 106 with the selected AP 102. When the association operation is completed, the selected AP 102 assigns an association identifier (AID) to STA 104, and AP 102 uses the association identifier (AID) to track STA 104.

[0042] As wireless networks become increasingly prevalent, STA 104 may have the opportunity to choose from one of many BSSs within its range or from multiple APs 102 that together form an Extended Service Set (ESS) (comprising multiple connected BSSs). For example, wireless communication network 100 may connect to a wired or wireless distribution system that enables multiple APs 102 to connect within such an ESS. Therefore, STA 104 may be covered by more than one AP 102 and may be associated with different APs 102 at different times for different transmissions. Additionally, after associating with an AP 102, STA 104 may periodically scan its surroundings to find a more suitable AP 102 to associate with. For example, STA 104 moving relative to its associated AP 102 may perform a “roaming” scan to find another AP 102 with more desirable network characteristics, such as a larger Received Signal Strength Indicator (RSSI) or reduced traffic load.

[0043] In some implementations, STA 104 may form a network without AP 102 or any other equipment besides STA 104 itself. An example of such a network is an ad hoc network (or wireless ad hoc network). Ad hoc networks may also be referred to as mesh networks or peer-to-peer (P2P) networks. In some implementations, ad hoc networks may be implemented within a larger network, such as wireless communication network 100. In such examples, while STA 104 may be able to communicate with each other via communication link 106 through AP 102, STA 104 may also communicate directly with each other via direct wireless communication link 110. Additionally, two STA 104 may communicate via direct communication link 110, regardless of whether the two STA 104 are associated with and served by the same AP 102. In such ad hoc systems, one or more STAs among STA 104 may assume the role played by AP 102 in the BSS. Such STA 104 may be referred to as the group owner (GO) and may coordinate transmissions within the ad hoc network. Examples of direct wireless communication links 110 include Wi-Fi direct connections, connections established by using Wi-Fi Tunneling Direct Link Establishment (TDLS) links, and other P2P group connections.

[0044] In some networks, AP 102 or STA 104, or both, can support applications associated with high throughput or low latency requirements, or can provide lossless audio to one or more other devices. For example, AP 102 or STA 104 can support applications and use cases associated with ultra-low latency (ULL), such as ULL gaming, or streaming lossless audio and video to one or more personal audio devices (such as peripherals) or AR / VR / MR / XR headsets. In scenarios where users use two or more peripherals, AP 102 or STA 104 can support extended personal audio networks that enable communication with two or more peripherals. Additionally, AP 102 and STA 104 can support additional ULL applications, such as cloud-based applications with both ULL and high throughput requirements (such as VR cloud gaming).

[0045] As indicated above, in some implementations, AP 102 and STA 104 may operate and communicate according to one or more of the IEEE 802.11 wireless communication protocol family of standards (via the corresponding communication link 106). These standards define WLAN radio and baseband protocols for the physical (PHY) layer and MAC layer. AP 102 and STA 104 transmit and receive wireless communications to and from each other in the form of PHY Protocol Data Units (PPDUs) (also referred to below as "Wi-Fi communication" or "wireless packets").

[0046] Each PPDU is a composite structure comprising a PHY preamble and a payload in the form of a PHY Service Data Unit (PSDU). The information provided in the preamble can be used by the receiving device to decode subsequent data in the PSDU. In instances where PPDUs are transmitted via bonded or wideband channels, the preamble field can be copied and transmitted in each of the multiple component channels. The PHY preamble may include both a legacy portion (or "legacy preamble") and a non-legacy portion (or "non-legacy preamble"). The legacy preamble can be used for other purposes such as packet detection, automatic gain control, and channel estimation. The legacy preamble is also typically used to maintain compatibility with legacy equipment. The format, decoding, and information provided in the non-legacy portion of the preamble are associated with the specific IEEE 802.11 wireless communication protocol to be used to transmit the payload.

[0047] AP 102 and STA 104 in the WLAN wireless communication network 100 can transmit PPDUs on unlicensed spectrum, which may be a portion of a spectrum including frequency bands traditionally used by Wi-Fi technologies, such as the 2.4 GHz band, 5 GHz band, 6 GHz band, 45 GHz band, and 60 GHz band. Some examples of AP 102 and STA 104 described herein may also communicate in other frequency bands that can support licensed or unlicensed communication. For example, AP 102 or STA 104, or both, may also be able to communicate in unlicensed operating frequency bands, where multiple operators may have corresponding licenses to operate within the same or overlapping frequency ranges. Such licensed operating bands may be mapped to or associated with the frequency ranges specified for FR1 (410MHz-7.125GHz), FR2 (24.25GHz-52.6GHz), FR3 (7.125GHz-24.25GHz), FR4a or FR4-1 (52.6GHz-71GHz), FR4 (52.6GHz-114.25GHz), and FR5 (114.25GHz-300GHz).

[0048] Each frequency band can include multiple sub-bands and frequency channels (also referred to as sub-channels). For example, PPDUs conforming to revisions of the IEEE 802.11n, 802.11ac, 802.11ax, 802.11be, and 802.11bn standards can be transmitted on one or more frequency bands in the 2.4 GHz, 5 GHz, or 6 GHz bands, each of which is divided into multiple 20 MHz channels. Therefore, these PPDUs are transmitted on physical channels with a minimum bandwidth of 20 MHz, but larger channels can be formed through channel bonding. For example, by bonding multiple 20 MHz channels together, PPDUs can be transmitted on physical channels with bandwidths of 40 MHz, 80 MHz, 160 MHz, 240 MHz, 320 MHz, 480 MHz, or 640 MHz.

[0049] Figure 2 An example protocol data unit (PDU) 200 capable of wireless communication between a wireless access point (AP) and one or more wireless STAs is shown. For example, the AP and STA can be reference... Figure 1 Examples of AP 102 and STA 104 are described. PDU 200 can be configured as a PPDU. As shown, PDU 200 includes a PHY preamble 202 and a PHY payload 204. For example, preamble 202 may include a legacy portion, which itself includes a legacy short training field (L-STF) 206 consisting of two symbols, a legacy long training field (L-LTF) 208 consisting of two symbols, and a legacy signal field (L-SIG) 210 consisting of two symbols. The legacy portion of preamble 202 may be configured according to the IEEE 802.11a wireless communication protocol standard. Preamble 202 may also include a non-legacy portion, which includes one or more non-legacy fields 212, for example, conforming to one or more of the IEEE 802.11 wireless communication protocol standard family.

[0050] L-STF 206 generally enables receiving devices (such as AP 102 or STA 104) to perform coarse timing and frequency tracking, as well as automatic gain control (AGC). L-LTF 208 generally enables receiving devices to perform fine timing and frequency tracking, and also to perform initial estimation of the radio channel. L-SIG 210 generally enables receiving devices to determine (e.g., acquire, select, identify, detect, determine, calculate, or compute) the duration of the PDU and use the determined duration to avoid transmission over the PDU. The legacy portion of the preamble can be modulated according to a binary phase shift keying (BPSK) modulation scheme, including L-STF 206, L-LTF 208, and L-SIG 210. The payload 204 can be modulated according to a BPSK modulation scheme, a quadrature BPSK (Q-BPSK) modulation scheme, a quadrature amplitude modulation (QAM) modulation scheme, or another suitable modulation scheme. Payload 204 may include a PSDU containing a data field (DATA) 214, which in turn may carry higher-level data in the form of, for example, MAC Protocol Data Unit (MPDU) or Aggregated MPDU (A-MPDU).

[0051] Figure 3 An example physical layer (PHY) protocol data unit (PPDU) 350 capable of being used for communication between a wireless AP and one or more wireless STAs is shown. For example, the AP and STA can be reference... Figure 1Examples of AP 102 and STA 104 are described below. As shown, PPDU 350 includes a PHY preamble (which includes a legacy portion 352 and a non-legacy portion 354) and a payload 356 (which includes a data field 374). The legacy portion 352 of the preamble includes L-STF 358, L-LTF 360, and L-SIG 362. The non-legacy portion 354 of the preamble includes a repetition of L-SIG (RL-SIG) 364 and multiple wireless communication protocol version-related signal fields following RL-SIG 364. For example, the non-legacy portion 354 may include a general signal field 366 (referred to herein as "U-SIG 366") and an EHT signal field 368 (referred to herein as "EHT-SIG 368"). The presence of RL-SIG 364 and U-SIG366 indicates to STA 104, which is EHT compliant or later, that PPDU 350 is an EHT PPDU or any later (post-EHT) version of a PPDU conforming to a new wireless communication protocol (conforming to the future IEEE 802.11 wireless communication protocol standard). One or both of U-SIG366 and EHT-SIG 368 can be configured as other wireless communication protocol versions above EHT that are associated with a revision of the IEEE standards family and carry version-related information for those protocol versions. For example, U-SIG 366 can be used by receiving devices (such as AP 102 and STA 104) to interpret bits in one or more of EHT-SIG 368 or data field 374. Similar to L-STF 358, L-LTF 360, and L-SIG 362, in instances involving the use of bonded channels, the information in U-SIG 366 and EHT-SIG 368 can be copied and transmitted in each of the component 20MHz channels within the component 20MHz channels.

[0052] The non-legacy portion 354 also includes an additional short training field 370 (referred to herein as "EHT-STF 370," but which can be constructed for other wireless communication protocol versions above EHT and carries version-related information for those protocol versions) and one or more additional long training fields 372 (referred to herein as "EHT-LTF 372," but which can be constructed for other wireless communication protocol versions above EHT and carry version-related information for those protocol versions). EHT-STF 370 can be used for timing and frequency tracking as well as AGC, and EHT-LTF 372 can be used for more refined channel estimation.

[0053] EHT-SIG 368 can be used by AP 102 to identify one or more STAs 104 and notify those STAs that AP 102 has scheduled uplink (UL) or downlink (DL) resources for them. EHT-SIG 368 can be decoded by each compatible STA 104 served by AP 102. EHT-SIG 368 can generally be used by the receiving device to interpret the bits in data field 374. For example, EHT-SIG 368 may include resource unit (RU) allocation information, spatial flow configuration information, and per-user (e.g., STA-specific) signaling information. Each EHT-SIG 368 may include a common field and at least one user-specific field. In the context of OFDMA, the common field may indicate the RU distribution across multiple STAs 104, indicate RU assignment in the frequency domain, indicate which RUs are allocated for MU-MIMO transmission and which RUs correspond to OFDMA transmission, and the number of users in the allocation, etc. The user-specific field is assigned to a specific STA 104 and carries STA-specific scheduling information, such as user-specific MCS values ​​and user-specific RU allocation information. This information enables the corresponding STA 104 to identify and decode the corresponding RU in the associated data field 374.

[0054] Figure 4 A schematic diagram of another example wireless communication network 400 is shown. According to some aspects, the wireless communication network 400 may be an example of a mesh network, IoT network, or sensor network based on one or more of the IEEE 802.11 wireless communication protocol family of standards (including the 802.11ah revision). The wireless network 400 may include multiple wireless communication devices 414. Wireless communication devices 414 may represent various devices such as display devices (e.g., TVs, computer monitors, navigation systems, etc.), music or other audio or stereo devices, remote control devices (“remote controllers”), printers, kitchen or other household appliances, etc.

[0055] In some implementations, wireless communication device 414 senses, measures, collects, or otherwise acquires and processes data, and then transmits such raw or processed data to intermediate device 412 for further processing or distribution. Additionally or alternatively, intermediate device 412 may send control information, digital content (e.g., audio or video data), configuration information, or other instructions to wireless communication device 414. Intermediate device 412 and wireless communication device 414 may communicate with each other via wireless communication link 416. In some implementations, wireless communication link 416 includes a Bluetooth link or other PAN or short-range communication links.

[0056] In some implementations, intermediate device 412 may also be configured to communicate wirelessly with other networks, such as Wi-Fi wireless communication network 100 or wireless (e.g., cellular) wide area network (WWAN), which in turn provides access to external networks, including the Internet. For example, intermediate device 412 may associate and communicate with an AP 102 of a WLAN network via Wi-Fi link 418, which may also serve various STAs 104. In some implementations, intermediate device 412 is an example of a network gateway (e.g., an IoT gateway). In this way, intermediate device 412 may act as an edge bridge providing Wi-Fi core backhaul for an IoT network that includes wireless communication device 414. In some implementations, intermediate device 412 may analyze, preprocess, and aggregate data received from local wireless communication device 414 at the edge via Wi-Fi link 418 before sending it to other devices or external networks. Intermediate device 412 may also provide additional security for the IoT network and the data it transmits.

[0057] The aspects of transmission can vary depending on the distance between the transmitter (e.g., AP 102 or STA 104) and the receiver (e.g., another AP 102 or STA 104). Wireless communication devices (such as AP 102 or STA 104) can generally benefit from having information relating to the location or proximity of various STA 104s within the coverage area. In some implementations, an RTT-based ranging procedure can be used to determine (e.g., calculate or compute) the relevant distance. Additionally, in some implementations, AP 102 and STA 104 can perform ranging operations. Each ranging operation may involve the exchange of Fine Timing Measurement (FTM) frames (such as those defined in the 802.11az revision of the IEEE wireless communication protocol standard family) to obtain measurements of the RTT transmission between the wireless communication devices.

[0058] Figure 5 An example of a wireless network 500 supporting dynamic transmit power control is shown. The wireless network 500 can implement as described in the reference... Figure 1 The aspects of the WLAN 100 shown and described, or implemented by these aspects, are as follows. For example, the aspects of the wireless network 500 may be implemented at or by a wireless device, which may be a specific implementation of the corresponding device described herein, such as referenced in [reference]. Figure 1The described AP 102 or STA 104. In some aspects, the wireless network 500 may include AP 505, STA 510, and STA 515, which may be specific implementations of the corresponding devices described herein. For example, AP 505 may be an example of a mobile AP. AP 505, STA 510, and STA 515 may be referred to herein as wireless devices, such as transmitting or receiving devices that support dynamic transmit power control.

[0059] The Wireless Network 500 supports AP power-saving operations to reduce AP power consumption. This technology supports improved P2P operations such as between STAs, between mobile APs, or between STAs and mobile APs. These power-saving operations extend the battery life of unconnected devices (non-AP STAs and mobile APs), reduce equipment costs, and decrease energy bills.

[0060] Wireless devices use a number of transmission parameters to configure message exchange. Examples of transmission parameters include, but are not limited to, the bandwidth available for wireless communication, received signal strength, number of spatial streams, MCS index, PPDU type, preamble puncturing mode, decoding scheme, Doppler value, or guard interval. In some wireless networks, wireless devices optimize these transmission parameters to improve data rates. For example, the transmitting device may select a given MCS or other parameters optimized for the data rate available for wireless communication.

[0061] However, in such networks, transmit power is typically limited to the maximum available transmit power. For example, the maximum available transmit power may be defined by a regulatory body, based on the managed AP, or by a third-party entity that sets such maximum values ​​based on the AP's location, the STAs associated with the AP, or both. This technology does not consider or otherwise depends on the location (physical separation) of the wireless devices or the channel conditions between the devices. Figure 5 As shown, AP 505 and STA 510 are closer to each other than STA 515. For example, this might result in better channel conditions between AP 505 and STA 510 than between AP 505 and STA 515. The default maximum available transmit power for communication between AP 505 and STA 510 might cause such wireless devices to transmit signals at maximum available transmit power or otherwise propagate them onto the wireless medium, introducing interference into the medium and wasting device resources.

[0062] Therefore, the aspects of the described technology enable dynamic transmit power control by the wireless device. Dynamic transmit power control typically optimizes the transmit power used for transmission, as well as other transmit parameters, to minimize energy consumption (for power-saving operations). This may include the wireless device transmitting or otherwise providing a first message at a first transmit power. The first message may carry or otherwise indicate that the wireless device will transmit one or more second messages during TxOP.

[0063] For example, a wireless device can use a channel access procedure to acquire a channel and send a first message to reserve or maintain the channel for a duration up to TxOP. The first message may have a first known initial transmit power (ITP). R The initial control frame of the first message. The device receiving the first message (receiving device) can use the first message with a second known initial transmit power (ITP). C The control response frame is used to respond to the initial control power. The first known initial transmit power and the second known initial transmit power can be known between the wireless devices (previously exchanged). In some implementations, the initial control frame / control response frame exchange can be a (Multi-User (MU) -) RTS / CTS frame exchange. In some implementations, the initial control frame and control response frame may include a field providing the transmit power for transmitting the frame. In some implementations, the frame may include a field from which the transmit power for that frame can be derived.

[0064] In some implementations, the exchange of initial control frames and control response frames can be used by one or two wireless devices to measure or otherwise determine the path loss value of the wireless channel. For example, the receiving device can use a first known initial transmit power (ITP). R To estimate the initial SINR between the receiving and transmitting devices (this initial SINR, along with ITP) R Together they can be used to calculate the path loss value. The receiving device can use a second known initial transmit power (ITP). C This is used to estimate the initial SINR between the transmitting and receiving devices.

[0065] Therefore, the second wireless device can select a second transmit power (ITP) for transmitting the second message. S Other transmission parameters, including, but not limited to, a second transmission power. More broadly, a second transmission power can be selected to satisfy metrics such as threshold power consumption. Different techniques can be applied when selecting a second transmission power.

[0066] The first approach could be for the wireless device to first optimize other transmission parameters (bandwidth, MCS, etc.) and then optimize the second transmission power to minimize power consumption. For example, the wireless device could select optimized values ​​for one, some, or all of the multiple transmission parameters before selecting the second transmission power. This could include the wireless device optimizing other transmission parameters based on wireless channel availability and the operating mode or capabilities of the receiving device.

[0067] The wireless device can then select a second transmit power based on a metric (after optimizing other transmit parameters). Broadly speaking, the metric can correspond to the minimum transmit power required to ensure successful PPDU delivery of the second message to the receiving device. For example, the metric used to select the second transmit power can ensure successful PPDU (second message) delivery, such as by ensuring a threshold reliability metric. Threshold reliability metrics can be based on any number of objectives, either individually or in any combination, such as target packet error rate, target energy consumption, space reuse opportunities, transmission opportunity protection, or other objectives.

[0068] The second approach involves the wireless device optimizing the second transmit power and other transmit parameters. For example, the wireless device can select values ​​for MCS, bandwidth, PPDU type, second transmit power, and other parameters based on metrics. In other words, the wireless device can select optimized values ​​for a combination of multiple transmit parameters and the second transmit power in a way that satisfies metrics and minimizes energy consumption.

[0069] As discussed above, the selection of the second transmit power can be based on the estimated SINR (path loss value) of the channel between the transmitting and receiving devices. As an example, the initial SINR can be based on the initial control frame / control response frame exchange performed between the transmitting and receiving devices. For example, the initial frame exchange can occur before the active transmit power period (the period during which dynamic transmit power control is implemented, such as during all TxOPs or a certain number of TxOPs). Additionally or alternatively, the initial SINR is given by the formula: SINR = received power / (interference + noise). The path loss value (which may correspond to the formula from Frith) is also considered. The initial SINR (20log component) can be based on the probing process performed between the transmitting and receiving devices. Alternatively, the initial SINR can be based on the distance between the transmitting and receiving devices. Alternatively, the initial SINR can be based on previous message exchanges (previous data communications or other message exchanges) with the receiving device. Therefore, the path loss value (initial SINR) can be measured by the transmitting device, by the receiving device, or by both devices.

[0070] In some aspects, a second transmission power (ITP) can be selected. SThe Δ value can be considered. In a broader sense, the Δ value allows for improved robustness in the transmission of the second message. That is, the Δ value allows for a slight increase in the second transmission power (based on or at the Δ value) to increase the reliability metric for the second message. In some implementations, the Δ value can be signaled to the transmitting device (from the AP), or it can be selected by the transmitting device (mobile AP). The transmitting device can determine the minimum second transmission power based on energy consumption metrics and other transmission parameters, such as those discussed above, and then use the Δ value to select the actual second transmission power to be used for transmitting the second message.

[0071] Therefore, the transmitting device can select a second transmission power for transmitting the second message. The second transmission power can be less than the first transmission power. In some specific implementations, the first transmission power (ITP) used for transmitting the first message... R The first known initial transmit power can be, for example, the maximum available transmit power. The second transmit power (ITP) S The transmission power can be less than or lower than the first transmission power (based on energy consumption metrics).

[0072] In some respects, the first known initial transmit power (ITP) R Second known initial transmission power (ITP) C ) or second transmission power (ITP) S The value of the combined transmit power can be defined or otherwise expressed based on the combined transmit power. The combined transmit power can be relative to or at the transmit antenna connector of one, some, or all of the antennas used by the wireless device to transmit the first message, such as in dBm / 20MHz channel. That is, the initial transmit power may be subject to regulatory restrictions and may not exceed other restrictions, such as those specified by the AP. For example, the initial transmit power may collectively be less than the transmit power envelope element or other elements.

[0073] Therefore, the transmitting device can transmit a second message at a second transmit power during the TxOP period based on the corresponding values ​​of multiple transmission parameters. In some implementations, the receiving device can send a response to the second message, such as an acknowledgment (ACK) message. In some implementations, the ACK message can be sent based on a first transmit power (at the maximum available transmit power).

[0074] The described dynamic transmit power control technique can reduce active power consumption of a STA or mobile AP while maximizing spatial reuse opportunities. The actual transmit power (at least for certain control frames, such as the control frame exchange at the beginning of a TxOP) can be referred to as the active power period. The active power period can be announced in the element or within the control frame itself. The definition and rules for dynamic transmit power can be based on the type of TxOP used for the second message.

[0075] The selection of the maximum transmit power to be used for control frames (for TxOP protection) can depend on the specific implementation of the transmitting device. The transmitting device can, based on its specific implementation, select a reduced transmit power level for the remainder of the active power period (to improve power savings).

[0076] Figure 6 An example of a signaling diagram 600 supporting dynamic transmit power control is shown. Signaling diagram 600 can implement, as referenced... Figure 1 The aspects of the WLAN 100 shown and described, or implemented by these aspects. For example, the aspects of signaling diagram 600 may be implemented at or by a wireless device, which may be a specific implementation of the corresponding device described herein, such as reference Figure 1 The AP 102 or STA 104 described herein. AP and STA may be referred to herein as wireless devices, such as transmitting or receiving devices that support dynamic transmit power control.

[0077] The transmitting device can compete for access to the channel by monitoring the energy level of the main channel or by detecting the 802.11 signal preamble during one or more monitoring opportunities 605. If the transmitting device determines that the channel is available, it can transmit or otherwise provide a first message 610 on the channel, indicating that it has captured the channel for TxOP and will transmit a second message during TxOP. For example, the transmitting device can identify or otherwise determine that it has the right to communicate with a receiving device (such as a reference device). Figure 1 The wireless communication performed by the STA 104 under discussion.

[0078] Therefore, the first message 610 may carry or otherwise indicate resource allocation information for TxOPs on the channel. In some embodiments, the first message 610 may be an initial control frame or other trigger frame. In some embodiments, such as Figure 6 As shown, the first message 610 can be an example of an RTS frame. The first message 610 can identify or otherwise indicate information about resources associated with the TxOP. For example, the transmitting device can configure the first message 610 to identify the duration of the TxOP, indicate the NAV used for its communication with the receiving device, the available frequency resources for the TxOP, or other allocation information supporting the TxOP. The first message can be transmitted in a non-high-throughput (HT) copy PPDU format, allowing the receiving device to decode the PPDU on any channel within the bandwidth.

[0079] In some respects, the transmitting device can operate at a first transmission power (ITP). RSend the first message 610. In some specific implementations, the first transmission power can be the maximum available transmission power.

[0080] The receiving device may send or otherwise provide a response 615 to the first message. The response 615 from the receiving device may be provided in a CTS (Committed Transmission to Service) frame. In some specific implementations, the response 615 may be carried in a trigger-based PPDU or otherwise transmitted. The response 615 from the receiving device may be provided on the channel associated with the TxOP.

[0081] In some implementations, response 615 may be sent at a power level based on a first transmit power. (MU-)RTS and CTS frame exchange may be performed at a known initial transmit power level. For example, response 615 to first message 610 may be sent at the maximum available transmit power (such as the first transmit power). In some implementations, providing the initial frame exchange message at the maximum available transmit power can protect the NAV to the widest possible extent. This can minimize connectivity loss due to mobility (avoiding roaming inducement due to dynamic transmit power operation).

[0082] The transmitting device can send a second message 620 (e.g., a PDU) to the receiving device based on the allocation information indicated in the first message. For example, the transmitting device can send data to the receiving device on the channel during TxOP.

[0083] Although the examples discussed herein allow the sending device to send a PDU to the receiving device, it should be understood that a PDU session may include multiple messages exchanged between the sending and receiving devices during TxOP. The dynamic transmit power technique discussed herein can be applied to the second message 620 sent to the receiving device, and to one or more third messages sent by the receiving device to the sending device during TxOP. That is, the receiving device can send a third message to the sending device with a third transmit power based on the second transmit power. For example, the third transmit power can be the second transmit power, or it can be selected based on the second transmit power in other ways.

[0084] The receiving device may send or otherwise provide (and the sending device may receive or otherwise obtain) an ACK message 625 (ACK frame) in response to sending the second message 620. The ACK frame may indicate acknowledgment or otherwise confirm the reception of the PDU. The ACK frame may be a block ACK frame indicating the PDU status of each PDU within the aggregated PDU (such as a "1" for successful reception or a "0" for failure) via a bitmap. The ACK frame may be provided via the channel during TxOP. The ACK frame confirms that the receiving device has successfully received and decoded the data (second message).

[0085] The transmitting device may select or otherwise determine the second transmission power to be used when transmitting the second message 620, based on the techniques described herein. For example, the second transmission power may be less than the first transmission power (a reduced transmission power less than the available transmission power). As an example, the second transmission power may be selected using a finite transmission power (based on energy consumption metrics) optimized after optimizing other transmission parameters. In another example, the second transmission power may be selected using a finite transmission power optimized in conjunction with other transmission parameters. In some specific implementations, information regarding the second transmission power may be communicated to the receiving device (via an element in a management frame exchanged between the transmitting and receiving devices). This information may be communicated in an operating mode (notification) exchange or within a (MU-)RTS / CTS frame exchange.

[0086] The second transmit power can be based on the path loss value (SINR) associated with the channel (the wireless medium between the transmitting and receiving devices). In some respects, the path loss value can be based on the location (separation in the physical domain) of the transmitting and receiving devices. The transmitting devices can exchange frames with the receiving device at a lower transmit power (using similar other transmit parameters) in a first location (close to each other) than in a second location (far apart). The path loss value can be based on location or on SINR, which may be affected by the location between the devices.

[0087] SINR estimation can be performed via a probe process between the transmitting and receiving devices. SINR estimation can also be performed using previous control frame exchanges, such as (MU-)RTS / CTS frame exchanges. The transmit power (ITP) used for RTS / CTS frame exchanges... R / ITP C The transmit power can be known to both the transmitting and receiving devices (e.g., previously coordinated). Therefore, the second transmit power can be based on the first and second initial transmit powers. RTS / CTS frame switching can be performed at the maximum available transmit power.

[0088] In some respects, PDUs transmitted after (MU-)RTS / CTS frame switching can be transmitted using or based on a lower transmit power (second transmit power). However, in some specific implementations, ACK frames (block ACK frames) transmitted in response to soliciting PDUs (typically control frames) can be transmitted at a higher transmit power.

[0089] In some implementations, selecting the transmission power of the initial portion (PHY header) of the first PDU after CTS can achieve different protections. For example, transmitting the initial portion at a second transmission power can achieve a TxOP with increased NAV protection (reduced space reuse). Transmitting the initial portion at the maximum available transmission power can achieve a TxOP with increased space reuse opportunities. Therefore, in some implementations, the transmitting device can transmit the first portion of the second message 620 at the maximum available transmission power and the second portion of the second message at the second transmission power.

[0090] Figure 7 An example of a signaling diagram 700 supporting dynamic transmit power control is shown. Signaling diagram 700 can implement, as referenced... Figure 1 The aspects of the WLAN 100 shown and described, or implemented by these aspects, are illustrated. Signaling diagram 700 can implement, or be implemented by, aspects of signaling diagram 600. For example, aspects of signaling diagram 700 can be implemented at or by a wireless device, which can be a specific implementation of the corresponding device described herein, such as referenced in [reference]. Figure 1 The AP 102 or STA 104 described herein. AP and STA may be referred to herein as wireless devices, such as transmitting or receiving devices that support dynamic transmit power control.

[0091] The transmitting device can compete for access to the channel by monitoring the energy level of the main channel or by detecting the 802.11 signal preamble during one or more monitoring opportunities 705. If the transmitting device determines that the channel is available, it can transmit or otherwise provide a first message 710 on the channel, indicating that it has captured the channel for TxOP and will transmit a second message during TxOP. For example, the transmitting device can identify or otherwise determine that it has a device to communicate with (such as a reference device). Figure 1 The wireless communication performed by the STA 104 under discussion.

[0092] Therefore, the first message 710 may carry or otherwise indicate resource allocation information for TxOPs on the channel. In some implementations, the first message 710 may be an initial control frame or other trigger frame. The first message 710 may be a reference... Figure 6 An example of the first message 610 discussed. The first message 710 may identify or otherwise indicate information about the resource associated with the TxOP. In some specific implementations, the first message 710 may be an example of an RTS frame, such as... Figure 7As shown. For example, the transmitting device can configure the first message 710 to identify the duration of TxOP, indicate the NAV used for its communication with the receiving device, the available frequency resources for TxOP, or other allocation information supporting TxOP. The first message 710 can be transmitted in a non-HT copied PPDU format, allowing the receiving device to decode the PPDU on any channel within the bandwidth.

[0093] In some respects, the transmitting device can operate at a first transmission power (ITP). C Send the first message 710. The first transmission power may be the maximum available transmission power, and in some specific implementations, this maximum available transmission power may be referred to as the first known initial transmission power.

[0094] The receiving device may send or otherwise provide a response 715 to the first message. The response 715 may be a reference. Figure 6 An example of response 615 is discussed. Response 715 from the receiving device may be provided in a CTS frame. In some specific implementations, response 715 may be carried in a trigger-based PPDU or otherwise transmitted. Response 715 from the receiving device may be provided on the channel associated with TxOP.

[0095] In some implementations, response 715 may be transmitted at a power level based on a first transmit power. (MU-)RTS and CTS frame switching may be performed with a known initial transmit power level. For example, response 715 to first message 710 may be transmitted at the maximum available transmit power (such as the first transmit power).

[0096] The transmitting device can send a second message 720 (e.g., a PDU) to the receiving device based on the allocation information indicated in the first message 710. For example, the transmitting device can send data to the receiving device on the channel during TxOP. The second message 720 can be a reference. Figure 6 An example of the second message 620 discussed herein. In some specific implementations, a PDU session may include multiple messages exchanged between the transmitting and receiving devices during TxOP. The dynamic transmit power technique discussed herein can be applied to the second message 720 sent to the receiving device, and to one or more third messages sent by the receiving device to the transmitting device during TxOP.

[0097] The receiving device may send or otherwise provide (and the sending device may receive or otherwise obtain) an ACK message 725 (ACK frame) in response to sending a second message 720. The ACK message 725 may be a reference. Figure 6An example of the ACK message 625 discussed. An ACK frame can indicate acknowledgment or otherwise confirm the reception of a PDU. An ACK frame can be a block ACK frame indicating the PDU status of each PDU within an aggregated PDU via a bitmap (such as a "1" for successful reception or a "0" for failure). ACK frames can be provided via the channel during TxOP. An ACK frame can confirm that the receiving device has successfully received and decoded data (second message 720).

[0098] The transmitting device may select or otherwise determine the second transmission power to be used when transmitting the second message 720, based on the techniques described herein. As discussed above and as... Figure 7 As shown, dynamic transmit power technology can be applied to some or all of the second message 720. For example, the transmitting device can transmit the first part (PHY header) of the second message 720 at a first transmit power, and then transmit the second part of the second message 720 at a second transmit power, which can be lower than the first transmit power. The dynamic transmit power transition between the PHY header and the payload can be distinguished based on TxOP.

[0099] In some implementations, the application of dynamic transmit power technology can be based on the type of TxOP. For example, the TxOP type can be a space reuse-protected TxOP or a NAV-protected TxOP. The transmitting device can selectively or otherwise identify the TxOP type used when transmitting the second message 720 and select the second transmit power based on the TxOP type. In some implementations, the transmitting device can dynamically select between different types of TxOPs by accordingly selecting the transmit power. For example, the transmitting device can select a second transmit power that is at a higher level for space reuse-protected TxOPs than for NAV-protected TxOPs. The transmitting device can set one or more space reuse-related fields in the first part of the second message 720 (such as in the PHY header of the PDU). This can indicate to the receiving device what the TxOP type is, which can be used to select the transmit power for message transmission by the receiving device during the TxOP.

[0100] In some specific implementations, the TxOP type can be selected by the transmitting device. That is, the TxOP holder (transmitting device) can choose the TxOP type and corresponding transmission power to be applied.

[0101] In some implementations, for example, the TxOP type can be selected as the AP and signaled to the transmitting device. For instance, the transmitting device can receive an indication of the TxOP type from the AP. The AP can select the TxOP type based on target key performance indicators (KPIs), and in some implementations, the selection can be coordinated with other APs.

[0102] In some implementations, the TxOP type can be dynamically switched by the AP and advertised to a specific STA, some STAs (a subset of STAs), or all STAs. The AP can receive various channel performance indicators or other indications from the STAs and use this feedback when selecting the TxOP type. As a non-limiting example, the TxOP type can be selected based on the direction (uplink or downlink) of the second message 720. For example, uplink traffic may benefit from NAV protection, while downlink traffic may benefit from space reuse protection.

[0103] Figure 8 A block diagram of an example wireless communication device 800 supporting dynamic transmit power control is shown. In some specific implementations, the wireless communication device 800 is configured to perform reference... Figure 9 The process 900 is described. Wireless communication device 800 may include one or more chips, SoCs, chipsets, packages, components, or devices that individually or collectively constitute or include a processing system. The processing system may interface with other components of wireless communication device 800 and typically processes information (such as inputs or signals) received from and outputs information (such as outputs or signals) to such other components. In some aspects, an example chip may include a processing system, a first interface for outputting or transmitting information, and a second interface for receiving or acquiring information. For example, the first interface may refer to an interface between the chip's processing system and a transmitting component, allowing wireless communication device 800 to transmit information output from the chip. In such examples, the second interface may refer to an interface between the chip's processing system and a receiving component, allowing wireless communication device 800 to receive information, which is then passed to the processing system. In some such examples, the first interface may also, for example, acquire information from the transmitting component, and the second interface may also, for example, output information to the receiving component.

[0104] The processing system of the wireless communication device 800 includes processor (or “processing”) circuitry in the form of one or more processors, microprocessors, processing units (such as a central processing unit (CPU), graphics processing unit (GPU), or digital signal processor (DSP)), processing blocks, application-specific integrated circuits (ASICs), programmable logic devices (PLDs) (such as field-programmable gate arrays (FPGAs)), or other discrete gate or transistor logic components or circuits (all of which may be individually referred to herein as “processors” or collectively as “processors” or “processor circuitry”). One or more of these processors may be individually or collectively configured to perform the various functions or operations described herein. The processing system may also include memory circuitry in the form of one or more memory devices, memory blocks, memory elements, or other discrete gate or transistor logic components or circuitry, each of which may include tangible storage media such as random access memory (RAM) or ROM or combinations thereof (all of which may be individually referred to herein as “memory” or collectively as “memory” or “memory circuitry”). One or more of these memories may be coupled to one or more processors and may store processor-executable code, individually or collectively, which, when executed by one or more processors, configures one or more processors to perform the various functions or operations described herein. Additionally or alternatively, in some embodiments, one or more processors may be pre-configured to perform the various functions or operations described herein without software configuration. The processing system may also include or be coupled to one or more modems (such as a Wi-Fi (e.g., IEEE compliant) modem or a cellular (e.g., 3GPP 4G LTE, 5G, or 6G compliant) modem). In some embodiments, one or more processors of the processing system include or implement one or more modems. The processing system may also include or be coupled to multiple radio components (collectively, “radio components”), multiple RF chains, or multiple transceivers, each of which may in turn be coupled to one or more antennas. In some embodiments, one or more processors of the processing system include or implement one or more of the radio components, RF chains, or transceivers.

[0105] In some specific implementations, the wireless communication device 800 may be configured to be used for, or be configured to be used for, in an AP or STA (such as reference STA). Figure 1This is used in the described AP 102 or STA 104. In some other examples, the wireless communication device 800 may be an AP or STA that includes such a processing system and other components including multiple antennas. The wireless communication device 800 is capable of transmitting and receiving wireless communications, for example, in the form of wireless packets. For example, the wireless communication device 800 may be configured to or be configured to transmit and receive packets in the form of physical layer PPDUs and MPDUs conforming to one or more of the IEEE 802.11 wireless communication protocol standard family. In some other examples, the wireless communication device 800 may be configured to or be configured to transmit and receive signals and communications conforming to one or more 3GPP specifications, including those for 5G NR or 6G. In some implementations, the wireless communication device 800 also includes one or more application processors or may be coupled to such application processors, which may also be coupled to one or more other memories. In some implementations, the wireless communication device 800 also includes a user interface (UI) (such as a touchscreen or keypad) and a display, which may be integrated with the UI to form a touchscreen display coupled to the processing system. In some embodiments, the wireless communication device 800 may also include one or more sensors, such as, for example, one or more inertial sensors, accelerometers, temperature sensors, pressure sensors, or altitude sensors coupled to the processing system. In some embodiments, the wireless communication device 800 also includes at least one external network interface coupled to the processing system, which enables communication with a core network or backhaul network that allows the wireless communication device 800 to obtain access to external networks, including the Internet.

[0106] The wireless communication device 800 includes a first message manager 825, a transmit power manager 830, and a second message manager 835. A portion of one or more of the first message manager 825, transmit power manager 830, and second message manager 835 may be implemented at least partially in hardware or firmware. For example, one or more of the first message manager 825, transmit power manager 830, and second message manager 835 may be implemented at least partially by at least a processor or modem. In some embodiments, a portion of one or more of the first message manager 825, transmit power manager 830, and second message manager 835 may be implemented at least partially by a processor and software in the form of processor-executable code stored in memory.

[0107] Wireless communication device 800 can support wireless communication according to examples disclosed herein. First message manager 825 can be configured or configured to transmit a first message at a first transmit power, the first message indicating that the wireless device will transmit one or more second messages during a transmission opportunity. Second message manager 835 can be configured or configured to transmit one or more second messages at a second transmit power during a transmission opportunity based on corresponding values ​​of a set of multiple transmission parameters, wherein the second transmit power satisfies a metric for the one or more second messages.

[0108] In some implementations, the transmit power manager 830 can be configured or configured to select an optimized value for one or more transmit parameters from a set of multiple transmit parameters, wherein the optimized value is based on the availability of the wireless channel and the operating mode or capability of the receiving device to which one or more second messages are intended. In some implementations, the transmit power manager 830 can be configured or configured to select a second transmit power after selecting the optimized value.

[0109] In some implementations, the transmit power manager 830 can be configured or configured to select an optimized value for a combination of one or more transmit parameters from a set of transmit parameters with a second transmit power, wherein the optimized value is optimized with respect to one or more of minimum energy consumption, spatial reuse opportunities, and protection of transmit opportunities. In some implementations, the set of transmit parameters includes one or more of MCS index, NSS, bandwidth, PPDU type, preamble puncturing mode, decoding scheme, Doppler value, guard interval, or combinations thereof. In some implementations, the metric is at least one of target packet error rate, target energy consumption, spatial reuse opportunities, transmit opportunity protection, or combinations thereof.

[0110] In some implementations, the transmit power manager 830 can be configured or configured to determine a minimum second transmit power based on an energy consumption metric and corresponding values ​​of a set of multiple transmit parameters. In some implementations, the transmit power manager 830 can be configured or configured to select a second transmit power based on a minimum second transmit power and a Δ value.

[0111] In some implementations, the transmit power manager 830 can be configured or configured to select a second transmit power based on the path loss value of the channel between the wireless device and the receiving device that is to receive one or more second messages.

[0112] In some implementations, the transmit power manager 830 can be configured to, or be configured to, measure the path loss value between the wireless device and the receiving device. In some implementations, this includes the distance between the wireless device and the receiving device, a probing process performed between the wireless device and the receiving device, previous message exchanges with the receiving device, a response to a first message received from the receiving device, or a combination thereof. In some implementations, the first transmit power is greater than the second transmit power.

[0113] In some specific implementations, in order to support the transmission of the first message, the first message manager 825 can be configured to or be configured to participate in the exchange of an initial control frame having a first known initial transmission power and a control response frame having a second known initial transmission power, wherein the first transmission power is one of the first known initial transmission power or the second known initial transmission power.

[0114] In some implementations, the values ​​of a first known initial transmit power and a second known initial transmit power are exchanged between the wireless device and the receiving device before selecting the second transmit power. In some implementations, the second transmit power is selected based on a path loss value associated with at least one of the first known initial transmit power or the second known initial transmit power.

[0115] In some implementations, the first known initial transmission power, the second known initial transmission power, or the second transmission power is represented by the combined transmission power at the transmit antenna connectors of all antennas used by the wireless device to transmit the first message. In some implementations, the first transmission power is the maximum available transmission power, and the second transmission power is less than the maximum available transmission power.

[0116] In some implementations, the second message manager 835 can be configured to receive an acknowledgment message in response to sending one or more second messages, wherein the acknowledgment message is associated with the first transmission power.

[0117] In some implementations, to support the transmission of one or more second messages during a transmission opportunity, the second message manager 835 can be configured or configured to transmit the first portion of one or more second messages at the maximum available transmission power. In some implementations, to support the transmission of one or more second messages during a transmission opportunity, the second message manager 835 can be configured or configured to transmit the second portion of one or more second messages at a second transmission power, which is a power level lower than the maximum available transmission power.

[0118] In some embodiments, the transmit power manager 830 can be configured or configured to select the transmission opportunity type used when transmitting one or more second messages. In some embodiments, the transmit power manager 830 can be configured or configured to select a second transmit power based on the transmission opportunity type. In some embodiments, the transmission opportunity type is either a NAV-protected transmission opportunity or a SR-protected transmission opportunity. In some embodiments, the second transmit power for a SR-protected transmission opportunity is greater than the second transmit power for a NAV-protected transmission opportunity. In some embodiments, when the transmission opportunity type is a NAV-protected transmission opportunity, a first transmit power is used to transmit at least a portion of the physical header or preamble of one or more second messages.

[0119] In some implementations, the transmit power manager 830 can be configured to, or be configured to, indicate spatial reuse information in the PHY header of one or more second messages based on the transmit opportunity type. In some implementations, the transmit opportunity type used when transmitting one or more second messages is selected by the wireless device.

[0120] In some implementations, the transmit power manager 830 can be configured to receive an indication of the transmit opportunity type from the AP, wherein a second transmit power is selected based on the transmit opportunity type.

[0121] In some implementations, the transmit power manager 830 can be configured to select a transmit opportunity type based on the transmission direction of one or more second messages, wherein the transmission direction is either uplink or downlink, and the second transmit power is selected based on the transmit opportunity type.

[0122] In some implementations, the transmit power manager 830 can be configured or be configured to receive one or more third messages at a second transmit power from a receiving device that receives one or more second messages during a transmit opportunity.

[0123] Figure 9 A flowchart illustrating an example process 900 that can be performed by or at a wireless device supporting dynamic transmit power control is shown. The operation of process 900 can be implemented by a wireless device or its components as described herein. For example, process 900 can be performed by a wireless communication device (such as reference _____) operating as a wireless AP or wireless STA, or within a wireless AP or wireless STA. Figure 8 The described wireless communication device 800 performs the operation. In some specific implementations, process 900 may be performed by a wireless AP or a wireless STA (such as reference 800). Figure 1 (either AP 102 or STA 104 as described) to perform.

[0124] In some implementations, in block 905, the wireless device may transmit a first message at a first transmit power, the first message indicating that the wireless device will transmit one or more second messages during a transmission opportunity. Operation of block 905 can be performed according to the examples disclosed herein. In some implementations, aspects of the operation of block 905 may be derived from references... Figure 8 The first message manager 825, as described, is used for execution.

[0125] In some implementations, in block 910, the wireless device can transmit one or more second messages at a second transmit power during a transmission opportunity, based on corresponding values ​​of a set of multiple transmit parameters, wherein the second transmit power satisfies a metric for the one or more second messages. The operation of block 910 can be performed according to the examples disclosed herein. In some implementations, aspects of the operation of block 910 can be derived from references... Figure 8 The second message manager 835 described is used to execute this.

[0126] Specific implementation examples are described in the following numbered clauses:

[0127] The following provides an overview of the various aspects of this disclosure:

[0128] Aspect 1: A method for wireless communication at a wireless device, the method comprising: transmitting a first message at a first transmit power, the first message indicating that the wireless device will transmit one or more second messages during a TxOP; and transmitting the one or more second messages during the TxOP at a second transmit power according to corresponding values ​​of a plurality of transmit parameters, wherein the second transmit power satisfies a metric for the one or more second messages.

[0129] Aspect 2: According to the method of aspect 1, the method further includes: selecting a second transmission power and the plurality of transmission parameters for the one or more second messages; selecting an optimized value of one or more of the plurality of transmission parameters, wherein the optimized value is based on the availability of the wireless channel and the operating mode or capability of the receiving device to which the one or more second messages are intended; and selecting the second transmission power after selecting the optimized value.

[0130] Aspect 3: The method according to any one of Aspects 1 to 2, the method further comprising: selecting the second transmission power and the plurality of transmission parameters for the one or more second messages; and selecting an optimized value of one or more of the plurality of transmission parameters in combination with the second transmission power, wherein the optimized value is optimized with respect to one or more of minimum energy consumption, space reuse opportunity and protection of the TxOP.

[0131] Aspect 4: The method according to any one of Aspects 1 to 3, wherein the plurality of transmission parameters includes one or more of the following: MCS index, NSS, BW, PPDU type, preamble punching mode, decoding scheme, Doppler value, guard interval, or combinations thereof.

[0132] Aspect 5: The method according to any one of Aspects 1 to 4, wherein the metric is at least one of target packet error rate, target energy consumption, space reuse opportunity, transmission opportunity protection, or a combination thereof.

[0133] Aspect 6: The method according to any one of Aspects 1 to 5, the method further comprising: selecting a second transmission power and the plurality of transmission parameters for the one or more second messages; determining a minimum second transmission power based on an energy consumption metric and the corresponding values ​​of the plurality of transmission parameters; and selecting the second transmission power based on the minimum second transmission power and a Δ value.

[0134] Aspect 7: The method according to any one of Aspects 1 to 6, the method further comprising: selecting a second transmission power and the plurality of transmission parameters for the one or more second messages; and selecting the second transmission power based on a path loss value of a channel between the wireless device and a receiving device to receive the one or more second messages.

[0135] Aspect 8: According to the method of aspect 7, the method further includes: measuring the path loss value between the wireless device and the receiving device.

[0136] Aspect 9: The method according to any one of Aspects 7 to 8, wherein the path loss value is based on at least one of the following: the distance between the wireless device and the receiving device, a probing process performed between the wireless device and the receiving device, a previous message exchange with the receiving device, a response to the first message received from the receiving device, or a combination thereof.

[0137] Aspect 10: The method according to any one of Aspects 1 to 9, wherein the first transmission power is greater than the second transmission power.

[0138] Aspect 11: The method according to any one of Aspects 1 to 10, wherein sending the first message further includes: participating in the exchange of an initial control frame having a first known initial transmission power and a control response frame having a second known initial transmission power, wherein the first transmission power is one of the first known initial transmission power or the second known initial transmission power.

[0139] Aspect 12: The method according to aspect 11, wherein the values ​​of the first known initial transmit power and the second known initial transmit power are exchanged between the wireless device and the receiving device before the second transmit power is selected, and the second transmit power is selected based on a path loss value associated with at least one of the first known initial transmit power or the second known initial transmit power.

[0140] Aspect 13: The method according to any one of Aspects 11 to 12, wherein the value of the first known initial transmission power, the second known initial transmission power, or the second transmission power is represented by the combined transmission power at the transmit antenna connector of all antennas used by the wireless device to transmit the first message.

[0141] Aspect 14: The method according to any one of Aspects 1 to 13, wherein the first transmission power is the maximum available transmission power, and the second transmission power is less than the maximum available transmission power.

[0142] Aspect 15: The method according to any one of aspects 1 to 14, the method further comprising: receiving an acknowledgment message in response to sending the one or more second messages, wherein the acknowledgment message is associated with the first transmission power.

[0143] Aspect 16: The method according to any one of Aspects 1 to 15, wherein transmitting the one or more second messages during the TxOP further comprises: transmitting a first portion of the one or more second messages at a maximum available transmission power; and transmitting a second portion of the one or more second messages at a second transmission power, the second transmission power being a power level lower than the maximum available transmission power.

[0144] Aspect 17: The method according to any one of aspects 1 to 16, the method further comprising: selecting a second transmission power and the plurality of transmission parameters for the one or more second messages; selecting a TxOP type for use when transmitting the one or more second messages; and selecting the second transmission power based on the TxOP type.

[0145] Aspect 18: The method according to aspect 17, wherein the TxOP type is one of a NAV-protected TxOP or an SR-protected TxOP.

[0146] Aspect 19: The method according to aspect 18, wherein the second transmit power for the SR-protected TxOP is greater than the second transmit power for the NAV-protected TxOP.

[0147] Aspect 20: The method according to any one of Aspects 18 to 19, wherein, in the case that the TxOP type is the NAV-protected TxOP, the first transmit power is used to transmit at least a portion of the physical header or preamble of the one or more second messages.

[0148] Aspect 21: The method according to any one of aspects 17 to 20, the method further comprising: indicating space reuse information in the PHY header of the one or more second messages according to the TxOP type.

[0149] Aspect 22: The method according to any one of aspects 17 to 21, wherein the TxOP type used when transmitting the one or more second messages is selected by the wireless device.

[0150] Aspect 23: The method according to any one of aspects 17 to 22, the method further comprising: receiving from the AP an indication of the TxOP type, wherein the TxOP type for use when sending the one or more second messages is selected according to the indication.

[0151] Aspect 24: The method according to any one of aspects 17 to 23, the method further comprising: selecting the TxOP type according to the transmission direction of the one or more second messages, wherein the transmission direction is one of an uplink or a downlink, wherein the second transmission power used when transmitting the one or more second messages is selected according to the TxOP type.

[0152] Aspect 25: The method according to any one of aspects 1 to 24, the method further comprising: receiving one or more third messages from a receiving device receiving the one or more second messages at the second transmit power during the TxOP.

[0153] Aspect 26: A wireless device for wireless communication, the wireless device comprising: one or more memories storing processor-executable code; and one or more processors coupled to the one or more memories and capable of operating individually or jointly to execute the code to cause the wireless device to perform a method according to any one of aspects 1 to 25.

[0154] Aspect 27: A wireless device for wireless communication, the wireless device comprising at least one component for performing the method according to any one of aspects 1 to 25.

[0155] Aspect 28: A non-transitory computer-readable medium storing code for wireless communication, said code including instructions executable by a processor to perform the method according to any one of aspects 1 to 25.

[0156] As used herein, the term "determine" encompasses a wide variety of actions, and therefore, "determine" can include calculation, computation, processing, derivation, estimation, investigation, searching (such as by searching in a table, database, or other data structure), reasoning, probing, or measurement, among other possibilities. Furthermore, "determine" can include receiving (such as receiving information), accessing (such as accessing data stored in memory), or sending (such as sending information), among other possibilities. Additionally, "determine" can include parsing, selecting, obtaining, choosing, building, and other similar actions.

[0157] As used herein, the phrase “at least one of” or “one or more of” a list of items refers to any combination of those items, including a single member. For example, “at least one of a, b, or c” is intended to cover: a, b, c, ab, ac, bc, and abc. As used herein, “or” is intended to be interpreted as inclusive unless otherwise explicitly stated. For example, “a or b” could include only a, only b, or a combination of a and b. Furthermore, as used herein, the phrase referring to “one” or “a” element means one or more such elements that act individually or collectively to perform the described function. Additionally, “set” refers to one or more items, and “subset” refers to less than the entire set but not empty.

[0158] As used herein, unless otherwise expressly indicated, “based on” is intended to be interpreted in an inclusive sense. For example, unless otherwise explicitly indicated, “based on” may be used interchangeably with “at least partially based on,” “associated with,” “associated with,” or “according to.” Specifically, unless the phrase in the context means “based on only one” or an equivalent, whether it is “based on one” or “at least partially based on one”, it may be based solely on “one” or based on a combination of “one” and one or more other factors, conditions, or information.

[0159] The various exemplary components, logic units, logic blocks, modules, circuits, operations, and algorithmic processes described in conjunction with the examples disclosed herein can be implemented as electronic hardware, firmware, software, or a combination of hardware, firmware, or software, including the structures disclosed in this specification and their structural equivalents. This interchangeability of hardware, firmware, and software has been generally described in terms of its functionality and exemplified in the various exemplary components, blocks, modules, circuits, and processes described above. Whether this functionality is implemented in hardware, firmware, or software depends on the specific application and the design constraints imposed on the overall system.

[0160] Various modifications to the examples described in this disclosure will be apparent to those skilled in the art, and the general principles defined herein may be applied to other examples without departing from the spirit or scope of this disclosure. Therefore, the claims are not intended to be limited to the examples shown herein, but are to be granted the widest scope consistent with this disclosure, the principles disclosed herein, and the novel features.

[0161] Additionally, the various features described in this specification in the context of individual examples may also be implemented in combination in a single embodiment. Conversely, the various features described in the context of a single embodiment may also be implemented individually or in any suitable sub-combination in multiple examples. Thus, although features may be described above as functioning in a particular combination, and even initially claimed in this way, one or more features from the claimed combination may be removed from the combination in some embodiments, and the claimed combination may be for sub-combinations or variations thereof.

[0162] Similarly, although operations are depicted in a specific order in the accompanying drawings, this should not be construed as requiring such operations to be performed in the specific order shown or in sequential order, or to perform all illustrated operations to achieve the desired result. Furthermore, the drawings may schematically depict one or more example processes in the form of flowcharts or flow diagrams. However, other operations not depicted may be incorporated into the schematically illustrated example processes. For example, one or more additional operations may be performed before, after, simultaneously with, or between any of the illustrated operations. In some environments, multitasking and parallel processing may be advantageous. Moreover, the separation of various system components in the examples described above should not be construed as requiring such separation in all examples, but rather should be understood as meaning that the described program components and systems can generally be integrated together in a single software product or encapsulated in multiple software products.

Claims

1. A wireless device, the wireless device comprising: A processing system, comprising one or more processors and one or more memories coupled to the one or more processors, the processing system being configured to cause the wireless device to: A first message is transmitted at a first transmission power, the first message instructing the wireless device to transmit one or more second messages during a transmission opportunity; as well as The one or more second messages are transmitted at a second transmission power during the transmission opportunity based on corresponding values ​​of a plurality of transmission parameters, wherein the second transmission power satisfies a metric for the one or more second messages.

2. The wireless device of claim 1, wherein the processing system is further configured to cause the wireless device to: Select the second transmission power and the plurality of transmission parameters for the one or more second messages; Select an optimized value for one or more of the plurality of transmission parameters, wherein the optimized value is based on the availability of the wireless channel and the operating mode or capability of the receiving device to which the one or more second messages are intended; and After selecting the optimized value, select the second transmission power.

3. The wireless device according to claim 1, wherein the processing system is further configured to: Select the second transmission power and the plurality of transmission parameters for the one or more second messages; and An optimized value is selected from one or more of the plurality of transmission parameters and the second transmission power, wherein the optimized value is optimized with respect to one or more of the following: minimum energy consumption, space reuse opportunity, and protection of the transmission opportunity.

4. The wireless device according to claim 1, wherein the plurality of transmission parameters includes one or more of the following: modulation decoding scheme (MCS) index, spatial stream number (NSS), bandwidth (BW), physical layer protocol data unit (PPDU) type, preamble puncturing mode, decoding scheme, Doppler value, guard interval, or combinations thereof.

5. The wireless device of claim 1, wherein the metric is at least one of target packet error rate, target energy consumption, spatial reuse opportunity, transmission opportunity protection, or a combination thereof.

6. The wireless device of claim 1, wherein the processing system is further configured to: Select the second transmission power and the plurality of transmission parameters for the one or more second messages; The minimum second transmission power is determined based on the energy consumption metric and the corresponding values ​​of the plurality of transmission parameters; as well as The second transmission power is selected based on the minimum second transmission power and the Δ value.

7. The wireless device of claim 1, wherein the processing system is further configured to: Select the second transmission power and the plurality of transmission parameters for the one or more second messages; and The second transmit power is selected based on the path loss value of the channel between the wireless device and the receiving device that is to receive the one or more second messages.

8. The wireless device of claim 7, wherein the processing system is further configured to cause the wireless device to: Measure the path loss value between the wireless device and the receiving device.

9. The wireless device of claim 7, wherein the distance between the wireless device and the receiving device, the detection process performed between the wireless device and the receiving device, the previous message exchange with the receiving device, the response to the first message received from the receiving device, or a combination thereof.

10. The wireless device according to claim 1, wherein the first transmission power is greater than the second transmission power.

11. The wireless device of claim 1, wherein, in order to send the first message, the processing system is configured to cause the wireless device to: Participate in the exchange of an initial control frame having a first known initial transmission power and a control response frame having a second known initial transmission power, wherein the first transmission power is one of the first known initial transmission power or the second known initial transmission power.

12. The wireless device according to claim 11, wherein: Before selecting the second transmit power, the values ​​of the first known initial transmit power and the second known initial transmit power are exchanged between the wireless device and the receiving device, and The second transmit power is selected based on a path loss value associated with at least one of the first known initial transmit power or the second known initial transmit power.

13. The wireless device of claim 11, wherein the value of the first known initial transmission power, the second known initial transmission power, or the second transmission power is represented by the combined transmission power at the transmit antenna connector of all antennas used by the wireless device to transmit the first message.

14. The wireless device of claim 1, wherein the first transmit power is a maximum available transmit power, and the second transmit power is less than the maximum available transmit power.

15. The wireless device of claim 1, wherein the processing system is further configured to cause the wireless device to: In response to sending the one or more second messages, an acknowledgment message is received, wherein the acknowledgment message is associated with the first transmission power.

16. The wireless device of claim 1, wherein, in order to transmit the one or more second messages during the transmission opportunity, the processing system is configured to cause the wireless device to: Transmit the first portion of the one or more second messages at the maximum available transmission power; and The second portion of the one or more second messages is transmitted at the second transmission power, which is a power level lower than the maximum available transmission power.

17. The wireless device of claim 1, wherein the processing system is further configured to: Select the second transmission power and the plurality of transmission parameters for the one or more second messages; Select the transmission opportunity type to use when sending the one or more second messages; and The second transmission power is selected based on the transmission opportunity type.

18. The wireless device of claim 17, wherein the transmission opportunity type is one of a transmission opportunity protected by a network allocation vector (NAV) or a transmission opportunity protected by spatial reuse (SR).

19. The wireless device of claim 18, wherein the second transmit power for the SR-protected transmission opportunity is greater than the second transmit power for the NAV-protected transmission opportunity.

20. The wireless device of claim 18, wherein, in the case that the transmission opportunity type is the NAV-protected transmission opportunity, the first transmission power is used to transmit at least a portion of the physical header or preamble of the one or more second messages.

21. The wireless device of claim 17, wherein the processing system is further configured to cause the wireless device to: According to the transmission opportunity type, spatial reuse information is indicated in the physical (PHY) header of one or more second messages.

22. The wireless device of claim 17, wherein the transmission opportunity type used when transmitting the one or more second messages is selected by the wireless device.

23. The wireless device of claim 17, wherein the processing system is further configured to: Receive an indication of the transmission opportunity type from the access point (AP), wherein the transmission opportunity type for use when transmitting the one or more second messages is selected according to the indication.

24. The wireless device of claim 17, wherein the processing system is further configured to: The transmission opportunity type is selected based on the transmission direction of the one or more second messages, wherein the transmission direction is either uplink or downlink, and the second transmission power used when transmitting the one or more second messages is selected based on the transmission opportunity type.

25. The wireless device of claim 1, wherein the processing system is further configured to cause the wireless device to: During the transmission opportunity, one or more third messages are received from the receiving device that received the one or more second messages at the second transmission power.

26. A method for conducting wireless communication at a wireless device, the method comprising: A first message is transmitted at a first transmission power, the first message instructing the wireless device to transmit one or more second messages during a transmission opportunity; as well as The one or more second messages are transmitted at a second transmission power during the transmission opportunity based on corresponding values ​​of a plurality of transmission parameters, wherein the second transmission power satisfies a metric for the one or more second messages.

27. The method according to claim 26, further comprising: Select an optimized value for one or more of the plurality of transmission parameters, wherein the optimized value is based on the availability of the wireless channel and the operating mode or capability of the receiving device to which the one or more second messages are intended; as well as After selecting the optimized value, select the second transmission power.

28. The method according to claim 26, further comprising: An optimized value is selected from one or more of the plurality of transmission parameters and the second transmission power, wherein the optimized value is optimized with respect to one or more of the following: minimum energy consumption, space reuse opportunity, and protection of the transmission opportunity.

29. A wireless device for wireless communication, the wireless device comprising: A component for transmitting a first message at a first transmission power, the first message indicating that the wireless device will transmit one or more second messages during a transmission opportunity; and A component for transmitting the one or more second messages at a second transmission power during the transmission opportunity according to corresponding values ​​of a plurality of transmission parameters, wherein the second transmission power satisfies a metric for the one or more second messages.

Images