Method for transmission power management of wireless transceiver device and wireless transceiver device

Abstract

A method of transmit power management of a wireless transceiver device and a wireless transceiver device are provided. The method may include transmitting at least one first packet from the wireless transceiver device to another device, using at least one first transmission power to monitor at least one packet error rate (PER) of the at least one first packet at the another device; and transmitting a second packet from the wireless transceiver device to the other device according to a PER detection result, the PER detection result comprising any of the at least one PER of the at least one first packet.

Description

[0001] Cross-references

[0002] This application claims priority to U.S. Provisional Application No. 63 / 659,963, filed June 14, 2024. The contents of that application are incorporated herein by reference. Technical Field

[0003] This invention relates to wireless devices, and more particularly, to a method for performing transmission power management of a wireless transceiver device in a wireless communication system by means of a transmission power test based on packet error rate (PER), and related devices such as workstation (STA) devices. Background Technology

[0004] According to relevant technologies, wireless communication devices in a Wireless Local Area Network (WLAN) can communicate with another wireless communication device through packet transmission and packet reception. However, predefined or fixed transmission power is often not the optimal setting for all user scenarios. It appears that there is no suitable solution in the relevant technologies. Therefore, a new approach and related architecture are needed to solve this problem without introducing any side effects or in a way that is unlikely to introduce side effects. Summary of the Invention

[0005] The purpose of this invention is to provide a method for performing transmission power management of wireless transceiver devices in a wireless communication system by means of a transmission power test based on packet error rate (PER), and related devices, such as access point (AP) devices, non-access point (non-AP) workstation (STA) devices, etc., to solve the above-mentioned problems.

[0006] At least one embodiment of the present invention provides a method for performing transmission power management of a wireless transceiver device in a wireless communication system by means of a transmission power test based on packet error rate (PER). For example, the method may include: transmitting at least one first packet from the wireless transceiver device to another device using at least one first transmission power to monitor at least one packet error rate (PER) of the at least one first packet at the other device; and transmitting a second packet from the wireless transceiver device to the other device based on a PER detection result, the PER detection result including any PER of the at least one PER of the at least one first packet.

[0007] At least one embodiment of the present invention provides a wireless transceiver device for performing transmission power management of the wireless transceiver device in a wireless communication system through a transmission power test based on packet error rate (PER). The wireless transceiver device may include a processing circuitry arranged to control the operation of the wireless transceiver device. The wireless transceiver device may also include at least one communication control circuitry coupled to the processing circuitry, arranged to perform communication control, wherein the at least one communication control circuitry arranges to perform wireless communication operations of the wireless transceiver device. For example, the wireless transceiver device arranges to transmit at least one first packet from the wireless transceiver device to another device at at least one first transmission power to monitor at least one packet error rate (PER) of the at least one first packet on the other device; and the wireless transceiver device arranges to transmit a second packet from the wireless transceiver device to the other device at a second transmission power, based on a PER detection result, the PER detection result including at least one PER of the at least one first packet.

[0008] According to some embodiments, the device may include at least one part (e.g., a portion or all) of a wireless communication system. For example, the device may represent a part of the wireless communication system, such as a wireless transceiver device (e.g., an AP device or a non-AP STA device). In some examples, the device may represent the entire wireless communication system.

[0009] The advantage of this invention is that the method and related devices (e.g., wireless transceiver devices) can optimize transmission power in various scenarios by applying PER-based transmission power testing. For example, regarding coverage extension, a wireless transceiver device operating according to this method can determine a transmission power with sufficient error vector amplitude (EVM) to maintain a high data rate transmission. For wireless communication, higher transmission power can improve receiver signal strength, which is beneficial for signal demodulation. However, higher transmission power may reduce the signal EVM due to the characteristics of radio frequency (RF) circuitry, and the EVM degradation of the transmitted signal may offset the benefits of increased transmission power. Determining the optimal transmission power with sufficient EVM is a problem because the EVM requirements of different channel types, attenuation, receiving devices, and data modulation are often different. A wireless transceiver device operating according to this method can transmit signals with different transmission powers based on PER detection results, thus easily performing coverage extension without such problems. Furthermore, regarding low power consumption, a wireless transceiver device operating according to this method can reduce the transmission power with sufficient signal-to-noise ratio (SNR) to maintain the same data rate. The SNR required to receive a specific data rate is usually fixed, and higher transmission power may provide excessive SNR, leading to high power consumption. Receiving a specific data rate with a low transmission power having sufficient SNR can reduce transmission power consumption. However, the sufficient SNR required to receive a specific data rate typically varies depending on the channel, attenuation, receiving device, and data modulation; therefore, determining the low transmission power with sufficient SNR is a problem. A wireless transceiver device operating according to this method can transmit signals with different transmission powers based on PER detection results, thus easily reducing power consumption without such problems. Furthermore, the method and related apparatus of this invention can solve related technical problems without introducing any side effects or in a way that is unlikely to introduce side effects.

[0010] These and other objectives of the present invention will become apparent to those skilled in the art upon reading the preferred embodiments described below in detail. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of a wireless communication system according to an embodiment of the present invention.

[0012] Figure 2 The second half of the text describes a PER-based transmission power control scheme for a method of performing transmission power management of a wireless transceiver device through a transmission power test based on packet error rate (PER) according to an embodiment of the present invention, wherein... Figure 2 The upper part can explain the transmission power control scheme based on error vector magnitude (EVM) for better understanding.

[0013] Figure 3 The coverage extension control scheme of the method according to embodiments of the present invention is described.

[0014] Figure 4 The lower half of the description illustrates an embodiment of the present invention. Figure 3 Some implementation details of the coverage extension control scheme shown, in which Figure 4 The upper part can illustrate examples related to EVM-based transmission power control schemes for better understanding.

[0015] Figure 5 A power consumption reduction control scheme according to an embodiment of the present invention is described.

[0016] Figure 6 The lower half of the description illustrates an embodiment of the present invention. Figure 5 Some implementation details of the power reduction control scheme shown, in which Figure 6 The upper part can illustrate examples related to EVM-based transmission power control schemes for better understanding.

[0017] Figure 7 The main workflow of the method according to an embodiment of the present invention is explained. Detailed Implementation

[0018] Certain terms are used in the following description and claims to refer to specific components. As will be understood by those skilled in the art, electronic device manufacturers may use different names to refer to components. This document is not intended to distinguish between components with different names but identical functions. In the following description and claims, the terms "comprising" and "including" are used in an open-ended manner and should therefore be interpreted as "including, but not limited to...". Furthermore, the term "coupled" is intended to indicate an indirect or direct electrical connection. Thus, if one device is coupled to another device, the connection can be a direct electrical connection or an indirect electrical connection via other devices and connections.

[0019] Figure 1 This is a schematic diagram of a wireless communication system 100 according to an embodiment of the present invention. For better understanding, the wireless communication system 100 and any wireless transceiver devices therein may be compatible with or backward compatible with one or more versions of the Institute of Electrical and Electronics Engineers (IEEE) 802.11 standard, but the invention is not limited thereto. The wireless communication system 100 may include multiple wireless transceiver devices. For example... Figure 1As shown, the multiple wireless transceiver devices in the wireless communication system 100 may include an AP device 110 and a STA device 120. The AP device 110 may include a processing circuit 112, at least one communication control circuit (e.g., one or more communication control circuits), which may be collectively referred to as communication control circuit 114, and at least one antenna (e.g., one or more antennas) of the communication control circuit 114. The STA device 120 may include a processing circuit 122, at least one communication control circuit (e.g., one or more communication control circuits), which may be collectively referred to as communication control circuit 124, and at least one antenna (e.g., one or more antennas) of the communication control circuit 124.

[0020] exist Figure 1 In the illustrated architecture, processing circuitry 112 can arrange and control the operation of AP device 110, enabling AP device 110 to act as at least one AP in wireless communication system 100, such as multiple APs integrated into AP device 110. Communication control circuitry 114 can be arranged to perform communication control, more specifically, to perform wireless communication operations with STA device 120 (or its communication control circuitry 124) so ​​that AP device 110... Furthermore, processing circuitry 122 can arrange and control the operation of STA device 120, enabling STA device 120 to act as at least one STA in wireless communication system 100, such as multiple STAs integrated into STA device 120. Communication control circuitry 124 can be arranged to perform communication control, more specifically, to perform wireless communication operations with AP device 110 (or its communication control circuitry 114) so ​​that STA device 120...

[0021] According to some embodiments, the processing circuit 112 can be implemented using at least one processor / microprocessor, at least one random access memory (RAM), at least one bus, etc., and the communication control circuit 114 can be implemented using at least one wireless network control circuit and at least one wired network control circuit, but the invention is not limited thereto. Examples of AP device 110 may include, but are not limited to, a Wi-Fi router. Furthermore, the processing circuit 122 can be implemented using at least one processor / microprocessor, at least one RAM, at least one bus, etc., and the communication control circuit 124 can be implemented using at least one wireless network control circuit, but the invention is not limited thereto. Examples of STA device 120 may include, but are not limited to, multifunction mobile phones, laptops, all-in-one computers, and wearable devices.

[0022] like Figure 1As shown, the multiple wireless transceiver devices in the wireless communication system 100 may include AP device 110 and STA device 120. This is for illustrative purposes only and is not intended to limit the invention. According to some embodiments, the multiple wireless transceiver devices in the wireless communication system 100 may be implemented using multiple multi-link devices (MLDs).

[0023] Figure 2 The second half describes a PER-based transmission power control scheme for performing transmission power management of a wireless transceiver device in a wireless communication system (e.g., any wireless transceiver device in the aforementioned wireless communication system 100, such as AP device 110 or STA device 120, such as a non-AP STA device), by means of a PER-based transmission power test, according to an embodiment of the invention, wherein in Figure 2 The upper part explains the EVM-based transmission power control scheme for better understanding. It is assumed that one or more functions of the wireless communication system 100 may be temporarily disabled to allow the AP device 110 and STA device 120 to control power according to... Figure 2 The upper part illustrates the operation of the EVM-based transmission power control scheme, but the invention is not limited thereto. The transmission power determination process for the EVM-based transmission power control scheme may include:

[0024] (1) In step S1, the target EVM can be determined as the worst EVM requirement of all supported scenarios and regulations, such as -39 dB in this example (for brevity, it is marked as "Target EVM = -39 dB");

[0025] (2) In step S2, the maximum transmission power (TX power) of the target EVM can be determined based on the performance of the RF circuit, for example... Figure 2 The curve shown in the upper part, more specifically, can be used to determine +15 dBm (abbreviated as "TX Power = +15 dBm" for simplicity); and

[0026] (3) In step S3, the transmission power can be adjusted downwards to account for manufacturing error, for example, an error of 1.5dB (for simplicity, it is marked as "1.5dB manufacturing error"), and more specifically, it can be adjusted downwards to 13.5dBm (for simplicity, it is marked as "TX power = 13.5dBm").

[0027] The transmission power margin is fixed after the transmission power determination process. In some good channel conditions and with good chips, this transmission power margin is unnecessary.

[0028] Table 1

[0029] condition EVM requirements IEEE Standards -35dB Conduction test -37dB Radiation test -39dB

[0030] Table 1 shows examples of corresponding EVM requirements under some conditions, where the conditions may include the first condition of the IEEE 802.11 standard or specification (hereinafter referred to as "IEEE SPEC"), the second condition for conducted testing, and the third condition for radiated testing. As mentioned above, the target EVM can be determined as the worst-case EVM requirement among all supported scenarios and regulations, such as -39 dB. After the transmit power determination process, the transmit power can be determined to be 13.5 dBm. However, for a good chip in conducted testing, 16.5 dBm is available, which means there is a 3 dB gain.

[0031] While increasing transmission power can improve data rates, it's crucial to determine if the current channel or chip requires that power margin. With a PER-based transmission power control scheme, any of the aforementioned wireless transceiver devices (e.g., AP device 110 or STA device 120, or non-AP STA devices) can optimize transmission power in all scenarios by applying PER-based transmission power trials. More specifically, it can determine whether transmission power is available, provided PER meets the requirements. For example, meeting PER means the overall SNR is sufficient. To achieve optimal coverage for the data rate, the wireless transceiver device can increase TX power until PER falls below a target PER threshold. If there is no low-PER transmission power, this data rate will not be used. Furthermore, to achieve usable low transmission power for a specific data rate, the wireless transceiver device can try a lower TX power and check its PER, continuing to use the lower transmission power if its PER meets system requirements. Figure 2 As shown in partial curve 210, the wireless transceiver device can control the TX power to be as high as possible to extend the coverage area; as... Figure 2 As shown in partial curve 220, the wireless transceiver device can control the TX power to be as low as possible to reduce power consumption.

[0032] In this embodiment, for better understanding, the curves corresponding to the expanded coverage and the curves corresponding to low power consumption can be as follows: Figure 2The lower half of the diagram is illustrated below. This is for illustrative purposes only and is not intended to limit the invention. According to some embodiments, the curves corresponding to coverage extension and low power consumption in the PER-based transmission power control scheme, respectively, may differ in their range and scale along the horizontal and vertical axes, and in the EVM-based transmission power control scheme, where the curve's range and scale along the horizontal and vertical axes, and / or related parameters may differ.

[0033] Figure 3 A coverage extension control scheme according to an embodiment of the present invention is illustrated. Any of the aforementioned wireless transceiver devices (e.g., AP device 110 or STA device 120) and another device (e.g., STA device 120 or AP device 110, or a peer AP device among a plurality of AP devices {110} that is similar to or identical to AP device 110, or a peer STA device (or a peer non-AP STA device) among a plurality of STA devices {120} that is similar to or identical to STA device 120) in the wireless communication system 100 can be configured according to... Figure 3 Follow the workflow shown.

[0034] start

[0035] In step S11, the wireless transceiver device may attempt to find a higher data rate (e.g., any next data rate higher than the current data rate, if any such next data rate exists), more specifically, determine whether it is necessary to switch to the aforementioned higher data rate (for brevity, denoted as "attempting a higher data rate"). If the determination result of step S11 is affirmative (or positive), then proceed to step S12; if the determination result of step S11 is negative (or negative), then... Figure 3 The workflow shown has ended.

[0036] In step S12, the wireless transceiver device may load a default transmission power corresponding to a higher data rate (e.g., any of the next data rates mentioned above, as recently determined in step S11).

[0037] In step S13, the wireless transceiver device may transmit a packet, such as a test packet, to another device using a default transmission power (e.g., the default transmission power just loaded in step S12) to perform a PER-based transmission power test. For example, the other device may monitor the PER of the packet (e.g., the test packet) from the wireless transceiver device and return the PER of the packet to the wireless transceiver device.

[0038] In step S14, the wireless transceiver device can determine whether the trial PER (e.g., the PER of the trial packets) is less than a first predetermined threshold, e.g., the first PER threshold (for simplicity, denoted as "trial PER < PER threshold"). If the determination result of step S14 is affirmative (or yes), then proceed to step S15; if the determination result of step S14 is negative (or no), then proceed to step S16. For example, the first PER threshold can represent the aforementioned target PER threshold.

[0039] In step S15, the wireless transceiver device can maintain the transmission power (e.g., the default transmission power just loaded in step S12) as the latest transmission power, and maintain the new data rate (e.g., any of the aforementioned next data rates recently determined in step S11) as the latest data rate, so as to transmit one or more subsequent packets at the latest data rate using the latest transmission power.

[0040] In step S16, the wireless transceiver device can increase the transmission power.

[0041] In step S17, the wireless transceiver device can determine whether the transmission power (e.g., the transmission power recently determined in step S16) is legal and below a first predetermined limit (e.g., the strict upper limit of the TX power). If the determination result of step S17 is affirmative (or yes), then proceed to step S13; if the determination result of step S17 is negative (or no), then proceed to step S18.

[0042] End

[0043] In step S18, the wireless transceiver device can abandon this new data rate.

[0044] For better understanding, the coverage extension control scheme can be illustrated by Figure 3 the workflow shown below, but the present invention is not limited thereto. According to some embodiments, one or more steps can be added, deleted, or changed in Figure 3 the workflow shown below. For example, the wireless transceiver device can use the latest transmission power (e.g., the transmission power determined or recently maintained in step S15, for the case where the partial workflow including at least steps S12 to S15 (even steps S12 to S17) has been executed in response to the determination result "yes" of step S11, or the current TX power recently used before executing step S21, for the case where the partial workflow including steps S12 to S18 has been skipped in response to the determination result "no" of step S11, or the partial workflow including at least steps S12 to S14 and S16 to S18 has been executed in response to the determination result "yes" of step S11) in the last part of the workflow (e.g., Figure 3The portion of the workflow following any steps S15 and S18 (as indicated by the arrows) transmits one or more subsequent packets to another device. For the sake of brevity, similar descriptions of these embodiments will not be repeated in detail here.

[0045] Table 2

[0046]

[0047] Table 2 illustrates an example of the corresponding default TX power for modulation and coding schemes (MCSs), but the invention is not limited thereto. Depending on some embodiments, the corresponding default TX power of available MCSs and / or MCSs may vary.

[0048] Figure 4 According to one embodiment of the invention, certain implementation details of the extended control scheme are described, wherein examples related to the EVM-based transmission power control scheme can be found in Figure 4 The first part of the explanation is provided for better understanding. It is assumed that one or more functions of the wireless communication system 100 may be temporarily disabled to allow the AP device 110 and STA device 120 to operate as described above. Figure 4 The upper part shows the operation of the EVM-based transmission power control scheme, but the present invention is not limited thereto. In the EVM-based transmission power control scheme, over time, the MCS may vary between the MCS sequence {2SS-M5,…,2SS-M5,2SS-M6,2SS-M5,…}, the data rate may vary between the data rate sequence {576.5,…,576.5,648.5,576.5,…}, the TX power may vary between the TX power sequence {19,…,19,18.5,19,…} (in dBm), and the PER may vary between the PER sequence {0,…,0,100%,0,…}.

[0049] Based on the coverage extension control scheme, any of the aforementioned wireless transceiver devices (e.g., AP device 110 or STA device 120) can optimize transmission power in various scenarios by applying PER-based transmission power trials. Over time, the MCS may vary between the MCS sequence {2SS-M5,…,2SS-M5,2SS-M6,2SS-M6,2SS-M6,2SS-M6,2SS-M6,2SS-M6,…,2SS-M6,2SS-M5,…}, and the data rate may vary between the data rate sequences {576.5,…,576.5,648 ... The TX power may vary between the TX power sequence {19,…,19,18.5,19.5,20.5,21.5,21.5,…,21.5,19,…}, in dBm. The PER may vary between the TX power sequence {0,…,0,100%,100%,100%,0,0,…,100%,0,…}. The TX power sequence {19,…,19,18.5,19.5,20.5,21.5,21.5,…,21.5,19,…} is related to the PER sequence {0,…,0,100%,100%,100%,0,0,…,100%,0,…}. Figure 4 As shown in the lower half, it can be accessed through Figure 2 The coverage expansion curves shown illustrate this. More specifically, the TX power subsequence {18.5, 19.5, 20.5, 21.5, 21.5, ...} is correlated with the PER subsequence {100%, 100%, 100%, 0, 0, ...}, as shown. Figure 4 As shown in the lower half, it can be accessed through Figure 2 The first rising curve (i.e., the rising curve before partial curve 210) and partial curve 210 are illustrated below. Furthermore, wireless transceiver devices (e.g., AP device 110 or STA device 120) can optimize TX power by applying a PER-based transmit power test 410. For the sake of brevity, a similar description of this embodiment will not be repeated in detail here.

[0050] According to some embodiments, Figure 4 The MCS, data rate, TX power, and PER and their related parameters may differ in any of the coverage extension control schemes and EVM-based transmission power control schemes shown.

[0051] Figure 5A power consumption reduction control scheme according to an embodiment of the present invention is described. Any of the aforementioned wireless transceiver devices (e.g., AP device 110 or STA device 120) and another device (e.g., STA device 120 or AP device 110, or a peer AP device similar to or identical to AP device 110, or a peer STA device similar to or identical to STA device 120 (or a peer non-AP STA device)) can be controlled within the wireless communication system 100 according to... Figure 5 The workflow shown is as follows.

[0052] In step S21, the wireless transceiver device can determine whether a low-power experiment needs to be initiated to attempt to reduce power consumption. If the determination result of step S21 is affirmative (or positive), then proceed to step S22; if the determination result of step S21 is negative (or negative), then... Figure 5 The workflow shown has ended.

[0053] In step S22, the wireless transceiver device may set the minimum power P_min to be equal to the current transmitted power (for simplicity, denoted as "P_min = Present transmitted power"). For example, if step S22 is performed in response to the determination result "yes" of step S21, the current transmitted power may represent the most recently used current TX power before step S21 was performed; otherwise, if step S22 is performed in response to the determination result "yes" of step S26, the current transmitted power may represent the most recently used latest TX power in the cycle including steps S22 to S26.

[0054] In step S23, the wireless transceiver device may reduce its transmission power to a lower power level for use as test power.

[0055] In step S24, the wireless transceiver device can determine whether the transmission power (e.g., the transmission power most recently determined in step S23, such as a lower transmission power used for testing power) is legal and above a second predetermined limit (e.g., a strict lower limit for TX power). If the determination result of step S24 is positive (or positive), then proceed to step S25; if the determination result of step S24 is negative (or negative), then proceed to step S27.

[0056] In step S25, the wireless transceiver device may transmit packets to another device using test power (e.g., the transmission power recently determined in step S23) to perform a PER-based transmission power test. For example, the other device may monitor the PER of packets from the wireless transceiver device (e.g., packets using test power) and return the PER of the packets to the wireless transceiver device.

[0057] In step S26, the wireless transceiver device may determine whether the trial PER (e.g., the PER of packets using the trial power) is less than a second predetermined threshold, such as a second PER threshold (for simplicity, denoted as "Trial PER < PERThreshold"). If the determination result of step S26 is affirmative (or yes), it proceeds to step S22; if the determination result of step S26 is negative (or no), it proceeds to step S27. For example, the second predetermined threshold in step S26, such as the second PER threshold, may be equal to the first predetermined threshold in step S14, such as the first PER threshold, but the present invention is not limited thereto. In another example, the second predetermined threshold in step S26, such as the second PER threshold, may be different from the first predetermined threshold in step S14, such as the first PER threshold.

[0058] In step S27, the wireless transceiver device may set the transmission power to be equal to the minimum power P_min (for simplicity, denoted as "Transmitted power = P_min").

[0059] For better understanding, the power consumption reduction can be illustrated by Figure 5 the workflow shown, but the present invention is not limited thereto. According to some embodiments, one or more steps may be added, deleted, or changed in Figure 5 the workflow shown. For example, the wireless transceiver device may transmit one or more subsequent packets to another device in the last part of the workflow (e.g., the part of the workflow after performing step S27 as indicated by the arrow), using the latest transmission power (e.g., the transmission power most recently determined in step S27, for the part of the workflow including steps S22 to S27 that has been executed in response to the determination result "yes" of step S21, or the current TX power most recently used before performing step S21, for the part of the workflow including steps S22 to S27 that has been executed without responding to the determination result "no" of step S21). For simplicity, similar descriptions of these embodiments are not repeated in detail here.

[0060] Figure 6 The lower half of Figure 5 illustrates some implementation details of the power consumption reduction control scheme shown according to an embodiment of the present invention, where Figure 6 the upper half of Figure 6The EVM shown in the upper part operates based on a transmission power control scheme, but the present invention is not limited thereto. Based on the EVM's transmission power control scheme, over time, the MCS may vary between the MCS sequence {2SS-M5, 2SS-M5, 2SS-M6, ...}, the data rate may vary between the data rate sequence {576.5, 576.5, 648.5, ...}, the TX power may vary between the TX power sequence {19, 19, 18.5, ...}, in dBm, and the PER may remain constant or vary between the PER sequence {0, 0, 0, ...}.

[0061] Based on the power consumption reduction control scheme, any of the aforementioned wireless transceiver devices (e.g., AP device 110 or STA device 120) can optimize transmission power in various scenarios by applying transmission power experiments based on packet error rate (PER). Over time, the MCS may vary between the MCS sequence {2SS-M5, 2SS-M5, 2SS-M6, 2SS-M6, 2SS-M6, 2SS-M6, 2SS-M6, 2SS-M6, 2SS-M6, 2SS-M6, 2SS-M6, 2SS-M6, ...}, and the data rate may vary between the data rate sequences {576.5, 576.5, 648.5, 648.5, 648.5, 648.5, 648.5, ...}. The TX power may vary between the TX power sequence {19,19,18.5,18.5,18.5,17.5,16.5,15.5,14.5,13.5,12.5,13.5,…}, in dBm. The PER may vary between the PER sequence {0,0,0,0,0,0,0,0,0,0,100%,0,…}. Figure 6 The lower half shows the TX power sequence {19,19,18.5,18.5,18.5,17.5,16.5,15.5,14.5,13.5,12.5,13.5,…} associated with the PER sequence {0,0,0,0,0,0,0,0,0,100%,0,…}. Figure 2 The curve shown corresponds to low power consumption. More specifically, Figure 6 The lower half shows the TX power subsequence {18.5, 17.5, 16.5, 15.5, 14.5, 13.5, 12.5, 13.5, ...} associated with the PER subsequence {0,0,0,0,0,0,100%,0,…}, which can be used... Figure 2The second V-shaped partial curve (i.e., the V-shaped partial curve before partial curve 220) and partial curve 220 are illustrated below. Furthermore, wireless transceiver devices (e.g., AP device 110 or STA device 120) can optimize TX power by applying a PER-based transmit power test 610. For the sake of brevity, a similar description of this embodiment will not be repeated in detail here.

[0062] According to some embodiments, MCS, data rate, TX power, and PER are... Figure 6 The power reduction control scheme and EVM-based transmission power control scheme, as well as the related parameters, in any of the control schemes shown may vary.

[0063] Figure 7 The main workflow of the method according to an embodiment of the present invention is described. Any of the aforementioned wireless transceiver devices (e.g., AP device 110 or STA device 120) and another device in the wireless communication system 100 (e.g., STA device 120 or AP device 110) can be adapted according to... Figure 7 The workflow shown is followed, but the invention is not limited thereto. For example, if the wireless transceiver device is implemented as AP device 110, another device can be implemented as STA device 120, such as the non-AP STA device or peer AP device described above; if the wireless transceiver device is implemented as STA device 120, such as a non-AP STA device, another device can be implemented as AP device 110 or the peer STA device (or peer non-AP STA device) described above.

[0064] In step S31, the wireless transceiver device may transmit at least one first packet (e.g., the test packet mentioned when first performing step S13, or the packet mentioned when first performing step S25) from the wireless transceiver device to another device at at least one first transmission power to monitor at least one packet error rate (PER) of the aforementioned at least one first packet in the other device (e.g., the test PER mentioned in step S14, or the test PER mentioned in step S26).

[0065] In step S32, the wireless transceiver device may transmit a second packet (e.g., the test packet mentioned in the second execution of step S13, or the packet mentioned in the second execution of step S25) to another device at a second transmission power based on the PER detection result. For example, the PER detection result includes any PER of at least one PER of the aforementioned first packet.

[0066] by Figure 3 Taking the illustrated workflow as an example, the aforementioned at least one first packet and the aforementioned at least one first transmission power in step S31 can be represented as... Figure 3The test group mentioned in the first iteration of any of the loops including steps S13, S14, S16, and S17, and the default transmission power mentioned in step S12, the second group and the second transmission power in step S32 can represent the test group mentioned in the second iteration of the same loop and the default transmission power mentioned in step S12, or represent the second group and the second transmission power mentioned in step S12. Figure 3 The illustrated workflow concludes with any subsequent packets transmitted to another device. According to some embodiments, the wireless transceiver device can... Figure 3 The final part of the workflow shown (e.g., the part of the workflow as indicated by the arrow after performing step S15) transmits a second packet to another device, such as any of the subsequent packets mentioned above.

[0067] by Figure 5 The illustrated workflow is another example. In step S31, the aforementioned at least one first packet and the aforementioned at least one first transmission power can represent the packet mentioned in step S25. The test power, for example, the reduced transmission power determined in step S23, includes... Figure 5 In any first iteration of at least one first iteration of steps S22 to S26 shown, the second group and second transmission power in step S32 may represent the group mentioned in step S25, and the test power, for example, the reduced transmission power determined in step S23, may be included. Figure 5 In the second iteration of steps S22 to S26 shown, or indicating in Figure 5 The illustrated workflow concludes with any subsequent packets transmitted to another device. According to some embodiments, the wireless transceiver device can... Figure 5 The final part of the workflow shown (e.g., the part of the workflow after step S27, as indicated by the arrow) transmits any of the subsequent packets mentioned above, or other second packets, to another device.

[0068] To better understand, we can use Figure 7 The workflow shown illustrates the method, but the invention is not limited thereto. According to some embodiments, it is possible to... Figure 7 One or more steps can be added, deleted, or modified in the illustrated workflow. For example, in the operation of step S31, the wireless transceiver device may transmit at least one first packet (e.g., the test packet mentioned in step S13 when step S13 is first executed, or the packet mentioned in step S25 when step S25 is first executed) from the wireless transceiver device to another device at at least one first transmission power to monitor the at least one PER of the at least one first packet (e.g., the test PER mentioned in step S14, or the test PER mentioned in step S26) at the other device to obtain a transmission power (TX power) sequence associated with the PER sequence (e.g., Figure 4The TX power sequence associated with the PER sequence shown is {19,…,19,18.5,19.5,20.5,21.5,21.5,…,21.5,19,…}, or Figure 6 The TX power sequence {19,19,18.5,18.5,18.5,17.5,16.5,15.5,14.5,13.5,12.5,13.5,…} and the PER sequence {0,0,0,0,0,0,0,0,0,0,100%,0,…} are shown to perform a PER-based transmission power test (e.g., Figure 4 The PER-based transmission power test 410 shown, or Figure 6 The PER-based transmission power test 610 is shown. Furthermore, the wireless transceiver device can determine the second transmission power mentioned in step S32 based on at least a portion (e.g., a portion or all) of the TX power sequence associated with the PER sequence. For example, regarding coverage extension, the aforementioned at least a portion of the TX power sequence associated with the PER sequence may include a first TX power subsequence associated with the first PER subsequence, such as... Figure 4 The illustrated TX power subsequence {18.5, 19.5, 20.5, 21.5, 21.5, ...} and PER subsequence {100%, 100%, 100%, 0, 0, ...} are shown, where the first TX power subsequence is associated with the first PER subsequence and carries a series of increasing TX power values, such as a series of increasing TX power values ​​{18.5, 19.5, 20.5, 21.5}. In another example, regarding power reduction, at least a portion of the aforementioned TX power sequence associated with the PER sequence may include a second TX power subsequence associated with the second PER subsequence, for example... Figure 6The illustrated TX power subsequence {18.5,17.5,16.5,15.5,14.5,13.5,12.5,13.5,…} is associated with the PER subsequence {0,0,0,0,0,0,100%,0,…}, wherein the second TX power subsequence is associated with the second PER subsequence and carries a series of decreasing TX power values, such as a series of decreasing TX power values ​​{18.5,17.5,16.5,15.5,14.5,13.5,12.5}. More specifically, the second TX power subsequence is associated with the second PER subsequence and further carries a first subsequent TX power value (e.g., TX power value 13.5) following the series of decreasing TX power values, wherein the first subsequent TX power value is greater than the last TX power value in the series of decreasing TX power values ​​(e.g., TX power value 12.5). The first subsequent TX power value, for example, TX power value 13.5, can be equal to the first of the last two TX power values ​​in a series of decreasing TX power values ​​(e.g., TX power values ​​{13.5, 12.5}). In a series of decreasing TX power values ​​{18.5, 17.5, 16.5, 15.5, 14.5, 13.5, 12.5}, the last TX power value, for example, TX power value 12.5, is the second of the last two TX power values, for example, TX power value {13.5, 12.5}, and follows the first, for example, TX power value 13.5. For the sake of brevity, similar descriptions of these embodiments will not be repeated in detail here.

[0069] According to some embodiments, for a first electronic product and a second electronic product of the same model operating according to a method for implementing a wireless transceiver device, the first maximum transmission power of the first electronic product and the second maximum transmission power of the second electronic product may be different from each other. For the sake of brevity, similar descriptions of these embodiments will not be repeated in detail here.

[0070] In EVM-based transmit power control schemes, transmit power can be determined by the maximum transmit power with a predefined transmit EVM specification. However, this predefined transmit EVM specification typically takes into account all types of channel effects, production variations, and receiver capability differences as worst-case scenarios. Some EVM margin may be reserved to cope with various variations. Therefore, the transmit power is fixed. However, if the receiver signal strength is much higher than required, excessive transmit power will lead to additional power consumption. In contrast, any of the aforementioned wireless transceiver devices (e.g., AP device 110 or STA device 120, such as non-APSTA devices) can optimize transmit power in various scenarios by applying PER-based transmit power trials. More specifically, if there is some margin in the required transmit EVM to increase transmit power, the wireless transceiver device can increase the transmit power to increase the receiver signal strength and observe the PER results. If the PER is low when the transmit power is increased, it means that the degraded transmit EVM is still good enough to achieve a higher data rate. If the receiver signal strength is higher than required, the wireless transceiver device can perform a PER-based transmit power test to find the minimum transmit power with sufficient receiver signal strength based on the PER results, thereby reducing the transmit power to reduce unnecessary power consumption.

[0071] Those skilled in the art will readily observe that numerous modifications and alterations can be made to the apparatus and method while retaining the doctrine of the invention. Therefore, the foregoing disclosure should be interpreted only within the scope of the appended claims.

Claims

1. A method for transmission power management of a wireless transceiver device, the method comprising: Transmit at least one first packet from the wireless transceiver device to another device, using at least one first transmission power, so as to monitor at least one packet error rate PER of the at least one first packet at the other device; as well as Based on the PER detection result, a second packet is transmitted from the wireless transceiver device to the other device, the PER detection result including any PER of the at least one PER of the at least one first packet.

2. The method of claim 1, wherein transmitting the at least one first packet from the wireless transceiver device to the other device, using the at least one first transmission power, to monitor the at least one PER of the at least one first packet at the other device further comprises: The at least one first packet is transmitted from the wireless transceiver device to the other device, using the at least one first transmission power to monitor the at least one PER of the at least one first packet at the other device to obtain a transmission power TX sequence associated with the PER sequence, in order to perform the PER-based transmission power test.

3. The method of claim 2, wherein the wireless transceiver device is arranged to determine the second transmission power based on at least a portion of the TX power sequence associated with the PER sequence.

4. The method of claim 2, wherein, with regard to coverage extension, at least a portion of the TX power sequence associated with the PER sequence includes a first TX power subsequence associated with the first PER subsequence, wherein the first TX power subsequence is associated with the first PER subsequence and carries a series of increased TX power values.

5. The method of claim 2, wherein, with respect to reducing power consumption, at least a portion of the TX power sequence associated with the PER sequence includes a second TX power subsequence associated with the second PER subsequence, wherein the second TX power subsequence is associated with the second PER subsequence and carries a series of reduced TX power values.

6. The method of claim 5, wherein the second TX power subsequence is associated with the second PER subsequence and further carries a first subsequent TX power value following the series of reduced TX power values, wherein the first subsequent TX power value is greater than the last TX power value in the series of reduced TX power values.

7. The method of claim 6, wherein the first subsequent TX power value is equal to the first of the last two TX power values ​​in the series of reduced TX power values, wherein the last TX power value is the second of the last two TX power values ​​and follows the first.

8. The method of claim 1, wherein the wireless transceiver device is implemented as an access point (AP) device or a non-access point (non-AP) workstation (STA) device.

9. The method of claim 1, wherein: If the wireless transceiver device is implemented as an access point (AP) device, the other device is implemented as a non-access point (non-AP) workstation (STA) device or a peer-to-peer (AP) device; and If the wireless transceiver device is implemented as a non-AP STA device, the other device is implemented as an AP device or a peer non-AP STA device.

10. The method of claim 1, wherein for a first electronic product and a second electronic product of the same model operating according to the method, the first maximum transmission power of the first electronic product and the second maximum transmission power of the second electronic product are different from each other.

11. A wireless transceiver device for performing transmission power management of the wireless transceiver device in a wireless communication system by means of a transmission power test based on packet error rate (PER), the wireless transceiver device comprising: The processing circuitry arranges and controls the operation of the wireless transceiver device. as well as At least one communication control circuit, coupled to the processing circuit, is arranged to perform communication control, wherein the at least one communication control circuit is arranged to perform wireless communication operation of the wireless transceiver device; in: The wireless transceiver device is configured to transmit at least one first packet from the wireless transceiver device to another device at at least one first transmission power, in order to monitor the at least one first packet error rate PER of at least one packet in the other device; as well as The wireless transceiver device is configured to transmit a second packet from the wireless transceiver device to the other device at a second transmission power, based on a PER detection result, which includes at least one PER of the at least one first packet.

12. The wireless transceiver device of claim 11, wherein the wireless transceiver device is arranged to transmit at least one first packet from the wireless transceiver device to the other device at at least one first transmission power to monitor the at least one first packet at at least one PER in the other device to obtain a transmission power (TX) sequence associated with the PER sequence to perform the PER-based transmission power test.

13. The wireless transceiver device of claim 12, wherein the wireless transceiver device is arranged to determine the second transmission power based on at least a portion of the TX power sequence associated with the PER sequence.

14. The wireless transceiver device of claim 12, wherein, with regard to coverage extension, at least a portion of the TX power sequence associated with the PER sequence includes a TX power subsequence associated with the PER subsequence, wherein the TX power subsequence is associated with the PER subsequence and carries a series of increased TX power values.

15. The wireless transceiver device of claim 12, wherein, with respect to power reduction, at least a portion of the TX power sequence associated with the PER sequence includes a TX power subsequence associated with the PER subsequence, wherein the TX power subsequence is associated with the PER subsequence and carries a series of reduced TX power values.

16. The wireless transceiver device of claim 15, wherein the TX power subsequence is associated with the PER subsequence and further carries a first subsequent TX power value following the series of reduced TX power values, wherein the first subsequent TX power value is greater than the last TX power value in the series of reduced TX power values.

17. The wireless transceiver device of claim 16, wherein the first subsequent TX power value is equal to the first of the last two TX power values ​​in the series of reduced TX power values, wherein the last TX power value is the second of the last two TX power values ​​and follows the first.

18. The wireless transceiver device of claim 11, wherein the wireless transceiver device is implemented as an access point (AP) device or a non-access point (non-AP) workstation (STA) device.

19. The wireless transceiver device as claimed in claim 11, wherein: If the wireless transceiver device is implemented as an access point (AP) device, the other device is implemented as a non-access point (non-AP) workstation (STA) device or a peer-to-peer (AP) device; and If the wireless transceiver device is implemented as a non-AP STA device, the other device is implemented as an AP device or a peer non-AP STA device.

20. The wireless transceiver device of claim 11, wherein for a first electronic product and a second electronic product of the same model implementing the wireless transceiver device, the maximum transmission power of the first electronic product and the maximum transmission power of the second electronic product are different from each other.

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