CN114144987A

CN114144987A - Uplink power control in multi-band transmission

Info

Publication number: CN114144987A
Application number: CN201980098684.4A
Authority: CN
Inventors: 容志刚
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-07-23
Filing date: 2019-07-23
Publication date: 2022-03-04
Anticipated expiration: 2039-07-23
Also published as: CN114144987B; WO2020096663A1

Abstract

A computer-implemented method for power control in a multi-band system includes receiving a wireless communication signal over a first frequency band. The wireless communication signal comprises a frame comprising resource allocation information for data transmission on the first and second frequency bands, a first indication indicating a first transmit power level of the signal on the first frequency band, a second indication indicating a first target power level on the first frequency band, and a third indication indicating a second target power level on the second frequency band; determining a second transmit power level and a third transmit power level based on the first target power level, the second target power level, and the first transmit power level; and transmitting data using the second transmit power level and the third transmit power level.

Description

Uplink power control in multi-band transmission

Technical Field

The present invention relates to data transmission in a wireless communication system, and more particularly, to power control in multiband transmission.

Background

With the increasing number of smartphones/tablets with wireless communication connectivity capabilities, the density of Access Points (APs) and Stations (STAs) is increasing. The high density of APs and STAs is advantageous for improving the throughput and data transmission efficiency of a wireless communication system, such as a Wireless Local Area Network (WLAN) or WiFi system.

In some implementations, Orthogonal Frequency Division Multiple Access (OFDMA), single carrier-frequency division multiple access (SC-FDMA), uplink multi-user multiple input multiple output (UL MU-MIMO) may be used for wireless communication systems that support high data throughput. Examples of such wireless communication systems include WLAN, Third Generation Partnership Project (3 GPP) Long Term Evolution (LTE) compatible communication systems, and 3GPP fifth Generation new radio (5G NR). To support these operations, it is necessary to control the power of received signals from multiple stations at the AP receiver. For example, for UL MU-MIMO, the power difference of the received signals from multiple stations on the same time-frequency resource should be within a reasonable range. Otherwise, if the difference is too large, interference from strong received signals will cover weak received signals, thereby reducing the effectiveness of UL MU-MIMO. For OFDMA, there may be interference leakage from one frequency resource unit to another, particularly for those adjacent frequency resource units. Therefore, if the power difference of the received signals from the plurality of stations cannot be kept within a reasonable range, the weak received signal will be covered by the strong received signal, and the performance of the receiver will be degraded. In addition, power control also helps to control interference between Overlapping Basic Service Sets (OBSSs).

Disclosure of Invention

The invention describes a power control procedure in a multi-band transmission system.

In a first implementation, a method for communicating in a wireless system, comprising: a station receiving a wireless communication signal on a first frequency band, wherein the wireless communication signal comprises a frame, the frame comprises resource allocation information for data transmission on the first frequency band and a second frequency band, the frame further comprises a first indication indicating a first transmission power level of the wireless communication signal on the first frequency band, a second indication indicating a first target power level on the first frequency band, and a third indication indicating a second target power level on the second frequency band; the station determines a second transmission power level and a third transmission power level according to the first target power level, the second target power level and the first transmission power level; the station transmits data on the first frequency band using a first outgoing signal according to the second transmit power level and on the second frequency band using a second outgoing signal according to the third transmit power level.

In a second implementation, a station includes: a non-transitory memory including instructions; and one or more hardware processors in communication with the memory, wherein the one or more hardware processors execute the instructions to: receiving a wireless communication signal on a first frequency band, wherein the wireless communication signal comprises a frame, the frame comprising resource allocation information for data transmission on the first frequency band and a second frequency band, the frame further comprising a first indication indicating a first transmit power level of the wireless communication signal on the first frequency band, a second indication indicating a first target power level on the first frequency band, and a third indication indicating a second target power level on the second frequency band; determining a second transmit power level and a third transmit power level based on the first target power level, the second target power level, and the first transmit power level; transmitting data on the first frequency band using a first outgoing signal according to the second transmit power level and on the second frequency band using a second outgoing signal according to the third transmit power level.

In a third implementation, a non-transitory computer-readable medium storing computer instructions that, when executed by one or more hardware processors, cause the one or more hardware processors to perform operations comprising: a station receiving a wireless communication signal on a first frequency band, wherein the wireless communication signal comprises a frame, the frame comprises resource allocation information for data transmission on the first frequency band and a second frequency band, the frame further comprises a first indication indicating a first transmission power level of the wireless communication signal on the first frequency band, a second indication indicating a first target power level on the first frequency band, and a third indication indicating a second target power level on the second frequency band; the station determines a second transmission power level and a third transmission power level according to the first target power level, the second target power level and the first transmission power level; the station transmits data on the first frequency band using a first outgoing signal according to the second transmit power level and on the second frequency band using a second outgoing signal according to the third transmit power level.

The above implementation may be implemented using: a computer-implemented method; a non-transitory computer readable medium storing computer readable instructions to perform a computer-implemented method; and a computer-implemented system comprising a computer memory interoperably coupled with a hardware processor for performing a computer-implemented method or instructions stored in a non-transitory computer-readable medium.

The details of one or more implementations of the subject matter of this specification are set forth in the accompanying drawings and the description. Other features, aspects, and advantages of the subject matter will become apparent from the description, the drawings, and the claims.

Drawings

Fig. 1 illustrates an exemplary communication system provided by one implementation that performs power control operations in a multi-band system.

Fig. 2 illustrates an exemplary multi-band communication scenario provided by various implementations.

Fig. 3 is a diagram of exemplary power control operations for multiband transmission provided by an implementation.

Fig. 4 is a diagram of another exemplary power control operation for multiband transmission provided by an implementation.

FIG. 5 is a flow diagram of an exemplary method for power control in multiband operation provided by an implementation.

FIG. 6 is a diagram of an exemplary trigger frame provided by one implementation.

Fig. 7 is a block diagram of an exemplary terminal provided by one implementation.

FIG. 8 is a block diagram of an exemplary network device provided by one implementation.

Fig. 9 is a diagram of an exemplary structure of a terminal described in the present invention provided by an implementation manner.

Fig. 10 is a diagram of an exemplary structure of an access point described in the present invention provided by one implementation.

Like reference numbers and designations in the various drawings indicate like elements.

Detailed Description

The following detailed description describes power control procedures in a multi-band transmission system, which are presented to enable one of ordinary skill in the art to make and use the disclosed subject matter in the context of one or more specific implementations.

Various modifications, changes, and arrangements to the disclosed implementations may be made, and the general principles defined may be applied to other implementations and applications without departing from the scope of the present invention, as will be apparent to those skilled in the art. In some instances, details that are not necessary for an understanding of the described subject matter may be omitted so as not to obscure one or more described implementations with unnecessary detail, as such details are within the ability of one of ordinary skill in the art. The present invention is not intended to be limited to the implementations described or shown, but is to be accorded the widest scope consistent with the principles and features described.

The Institute of Electrical and Electronics Engineers (IEEE) 802.11 Working Group (WG) agreed to form a research Group (SG) named Extrment High Throughput (EHT). The task of EHT is to develop a new generation of Physical (PHY) and Media Access Control (MAC) amendment for operating in the frequency band between 1 gigahertz (GHz) and 7.125 GHz. The goal is to improve peak throughput and efficiency and support high throughput and low latency applications such as WLAN video, gaming, Augmented Reality (AR) and Virtual Reality (VR).

In some implementations, multiband aggregation may be used to improve data transmission throughput in a wireless communication system. In multiband aggregation, multiple frequency resource units of different frequency bands (e.g., 2.4GHz, 5GHz, and 6GHz) are allocated to the same STA to communicate with the same AP. By utilizing frequency resources on multiple frequency bands, the STA/AP may transmit data packets on different frequency bands simultaneously. In some cases, the same STA/AP may transmit different data packets on different frequency bands at the same time to improve data throughput. Alternatively, or in combination, the same STA/AP may transmit different versions of the same packet on different frequency bands at the same time to improve reliability.

In some implementations, the power level of signals received at the AP receiver from multiple STAs may be controlled by controlling the transmission power used by the STAs for transmission on the Uplink (UL) band. However, multiband operation presents challenges to UL power control. For example, the AP may send a trigger frame to the STA to instruct the STA to transmit a data packet on the UL. In single band operation, UL and Downlink (DL) are transmitted on the same frequency band. Therefore, the STA can determine the UL path loss from the measurement result of the trigger frame on the DL because the UL and DL are on the same frequency band and perform UL power control according to the path loss.

In multiband aggregation operation, the multiple frequency bands used for UL transmission may be different from one or more DL frequency bands of the transmission trigger frame. Since the channel status on different frequency bands may typically be different, e.g., the path loss derived from the measurement of the trigger frame on the DL frequency band may be different from the path loss on the UL frequency band, the above-described single-band UL power control method may not be applicable.

In some implementations, the AP may provide power control information to the STAs in a DL trigger frame. The power control information may include a first indication indicating a DL transmit power level on the first frequency band, a second indication indicating a first UL target power level on the first frequency band, and a third indication indicating a second UL target power level on the second frequency band. The STA may determine UL transmit power levels on the first frequency band and the second frequency band based on the indications. The STAs may transmit data on the first frequency band and the second frequency band using respective transmit power levels. Fig. 1-11 and the associated description provide additional details of these implementations.

Fig. 1 illustrates an exemplary communication system 100 provided by one implementation that performs power control operations in a multi-band system. At a high level, the exemplary communication system 100 includes a STA 102 communicatively coupled to an AP 104. The STAs 102 and the AP 104 may communicate with each other over multiple carriers of the same or different frequency bands. For example, as shown, the STA 102 may transmit to the AP 104 simultaneously on carriers in

bands

122 and 124. The STA 102 may also receive from the AP 104 simultaneously on carriers in

bands

122 and 124. The exemplary communication system 100 also includes STAs 106, which STAs 106 can transmit to and receive from the AP on carriers in

frequency bands

126 and 128. Although two frequency bands are shown in fig. 1, more than two frequency bands may be used for simultaneous transmission between the AP and the STA. Hereafter, references to communication on a frequency band are to be understood as being on a carrier within said frequency band.

Although not shown, the AP 104 may communicate with additional STAs. Further, in some implementations, the

STAs

102 and 106 may transmit directly to each other.

The AP 104 may be part of the network 110. Network 110 may include additional APs and other network devices. The network 110 may be an IEEE 802.11 Wireless Local Area Network (WLAN). Additionally or alternatively, the network 110 may include other wireless networks, wired networks, or a combination thereof. Examples of other wireless networks may include global system for mobile communications (GSM), General Packet Radio Service (GPRS), enhanced data rates for GSM evolution (EDGE), interim standard 95 (IS-95), Code Division Multiple Access (CDMA) 2000, evolution-data optimized (EVDO), Universal Mobile Telecommunications System (UMTS), Long Term Evolution (LTE), enhanced (LTE-Advanced, LTE-a), 5G, IEEE 802.16.16 WiMAX, or any combination thereof. Examples of wired networks may include a Local Area Network (LAN), a cable, an optical network, or any combination thereof.

The AP 104 may also be referred to as a base station. The base station may control all or at least part of the radio related functions in the fixed part of the system. A base station may provide a wireless interface for mobile devices to communicate within its coverage area or cell.

STAs (e.g., STAs 102 or 106) may include, but are not limited to, any of the following: a computing device, mobile electronic device, user device, mobile station, subscriber station, portable electronic device, mobile communication device, wireless modem, wireless terminal, or other electronic device. Examples of mobile devices may include cellular phones, Personal Data Assistants (PDAs), smart phones, laptops, tablets, Personal Computers (PCs), pagers, portable computers, portable gaming devices, wearable electronic devices, health/medical/fitness devices, cameras, or other mobile communication devices having components for communicating voice or data over a wireless communication network.

While the elements of fig. 1 are shown as including various component parts, portions, or modules that implement various features and functions, the elements may alternatively include a number of sub-modules, third party services, components, libraries, etc., as appropriate. In addition, the features and functionality of the various components may be combined into fewer components as appropriate.

Fig. 2 illustrates an exemplary multi-band communication scenario provided by various implementations. In a first example scenario illustrated by diagram 210, the AP 104 transmits data to the STAs 102 simultaneously on two frequency bands (band 1 and band2), while the STAs 102 transmit data to the AP 104 simultaneously on the same two frequency bands. In a second example scenario illustrated by diagram 220, the AP 104 transmits data to the STA 102 on one frequency band (band 1), while the STA 102 transmits data to the AP 104 on two frequency bands (band 1 and band2) simultaneously. In a third example scenario illustrated by diagram 230, the AP 104 transmits data to the STA 102 simultaneously on two frequency bands (band 1 and band2), and the STA 102 transmits data to the AP 104 on one of the two frequency bands (band 1). In a fourth exemplary scenario, shown in diagram 240, the AP 104 transmits data to the STA 102 on one frequency band (band 1), while the STA 102 transmits data to the AP 104 on a different frequency band (band 2). In some cases, the AP 104 may transmit a trigger frame to indicate the number and identity of UL frequency bands on which the STA 102 is to transmit. In some cases, for example, as shown in diagrams 220 and 240, the trigger frame may be transmitted on one DL band to instruct the STAs 102 to transmit data on different UL bands. Although the exemplary multiband communication scenario shown in fig. 2 includes two frequency bands, in multiband operation, multiple frequency bands may be used for simultaneous transmission.

Fig. 3 is a diagram 300 of exemplary power control operations for multiband transmission provided by an implementation. For clarity of presentation, the following description generally describes operations in the context of other figures in this description. This operation may be implemented by communication devices, such as the AP 104 and the STAs 102 shown in fig. 1. However, it should be understood that the operations may optionally be performed by any suitable system, environment, software, and hardware, or combination of systems, environments, software, and hardware, for example. In some implementations, the various steps of the operations may be performed in parallel, in combination, in a loop, or in any order.

At 310, the AP 104 determines a resource allocation for one or more STAs. In the illustrated example, frequency resources of two different bands (band 1 and band2) are allocated to the STAs 102. The AP 104 also determines Target UL received power levels UL _ Target _ RSSI _ Band1 and UL _ Target _ RSSI _ Band2 for the two UL frequency bands. UL _ Target _ RSSI _ Band1 and UL _ Target _ RSSI _ Band2 may be determined according to: bandwidth of uplink resources allocated for uplink transmission on the corresponding frequency band, Modulation and Coding Scheme (MCS) configured for uplink transmission on the corresponding frequency band, and noise and interference levels measured at the AP 104 on the corresponding frequency band.

At 320, the AP 104 transmits DL frames to the STAs 102 on one frequency band (band 1). In some cases, the DL frame may be referred to as a trigger frame. The DL frame includes UL scheduling information that the STAs 102 use for simultaneous transmission on two bands (band 1 and band 2). The UL scheduling information may indicate UL frequency resources of the two frequency bands. The DL frame also includes a first indication indicating the transmit power level, denoted PDL _ TX, that the AP 104 uses to transmit the DL frame on frequency band 1. PDL _ TX may be set in the form of a nominal transmit power of a DL frame or a transmit power of a DL frame normalized to a bandwidth (e.g., 20MHz bandwidth).

The DL frame also includes a second indication (denoted as UL _ Target _ RSSI _ Band1) indicating a first Target power level on frequency Band1, and a third indication (denoted as UL _ Target _ RSSI _ Band2) indicating a second Target power level on a second frequency Band. The term "RSSI" refers to a received signal strength indicator.

In some implementations, the DL frame may also include a fourth indication indicating a path loss difference, denoted PLDiff, between the first path loss on band1 and the second path loss on band 2. The AP 104 may determine the UL path loss between the STA 102 and the AP 104 on band1, denoted as PLBand1, from the previous UL transmission of the STA 102 on band 1. Similarly, the AP 104 may determine the UL path loss between the STA 102 and the AP 104 on band2, denoted as PLBand2, from the previous UL transmission of the STA 102 on band 2. AP 104 may calculate the path-loss difference PLDiff using the following equation:

PLDiff＝PLBand2–PLBand1。

at 330, the STA 102 determines transmit power levels on band1 and band 2. The STA 102 may measure the DL receive power of DL frames from the AP on Band1, denoted as PDL _ RX _ Band 1. The STA 102 may then calculate the path loss of the AP and STA on Band1 from the difference between the DL transmit power and the DL receive power of the AP 104 by using the following equation, denoted as PL _ Band1_ STA:

PL_Band1_STA＝PDL_TX–PDL_RX_Band1。

the STA 102 may determine the path loss between the AP 104 and the STA 102 in Band2 from the path loss in Band1 (PL _ Band1_ STA), and the path loss difference between Band1 and Band2 (PLDiff), denoted as PL _ Band2_ STA, using the following equation:

PL_Band2_STA＝PL_Band1_STA+PLDiff。

the STA 102 may also determine the UL transmit power levels on Band1 and Band2, denoted as PUL _ TX _ Band1 and PUL _ TX _ Band2, respectively, based on the path loss and the target UL received power for Band1 and Band2 using the following equations:

PUL_TX_Band1＝UL_Target_RSSI_Band1+PL_Band1_STA

PUL_TX_Band2＝UL_Target_RSSI_Band2+PL_Band2_STA。

in 340, the STA 102 simultaneously transmits data on band1 and band2 using the frequency resources indicated in the DL frame. The STAs 102 transmit at transmit power levels PUL _ TX _ Band1 on Band1 and PUL _ TX _ Band2 on Band 2. In some cases, UL transmissions on band1 and band2 begin in a short interframe space (SIFS) after the end of the received DL frame.

In some cases, the UL transmit power may be limited by the maximum transmit power of the STA 102 (denoted as PUL TX Max). For example, the sum of PUL _ TX _ Band1 and PUL _ TX _ Band2 may exceed PUL _ TX _ Max. In these or other cases, the STA 102 may determine adjusted UL transmit power levels for Band1 and Band2, denoted as PUL _ TX _ Band1_ Real and PUL _ TX _ Band2_ Real, respectively. The STAs 102 may transmit on band1 and band2 using the adjusted UL transmit power levels for band1 and band 2. In one example, upon determining that the sum of PUL TX _ Band1 and PUL TX _ Band2 exceeds PUL TX Max, the STA 102 may prioritize transmissions on Band1 and allocate the remaining power (if any) to transmissions on Band 2. Thus, the STA 102 may determine PUL _ TX _ Band1_ Real and PUL _ TX _ Band2_ Real using the following equations:

PUL _ TX _ Band1_ Real ═ min (PUL _ TX _ Band1, PUL _ TX _ Max), and

lin(PUL_TX_Band2_Real)＝lin(PUL_TX_Max)–lin(PUL_TX_Band1_Real)，

where min () is the minimum function that returns the minimum value of the input element; lin () is a function that converts input elements in the logarithmic domain to the linear domain, e.g., lin () may convert power values in decibels (dBm) to values in milliwatts (mW).

In another example, the STA 102 may prioritize transmissions on band2 and allocate the remaining power (if any) to transmissions on band 1. Thus, the STA 102 may determine PUL _ TX _ Band1_ Real and PUL _ TX _ Band2_ Real using the following equations:

PUL _ TX _ Band2_ Real ═ min (PUL _ TX _ Band2, PUL _ TX _ Max), and

lin(PUL_TX_Band1_Real)＝lin(PUL_TX_Max)–lin(PUL_TX_Band2_Real)。

in yet another example, upon determining that the sum of PUL _ TX _ Band1 and PUL _ TX _ Band2 exceeds PUL _ TX _ Max, STA 102 may determine PUL _ TX _ Band1_ Real and PUL _ TX _ Band2_ Real by scaling down PUL _ TX _ Band1 and PUL _ TX _ Band2 according to the following equations:

a factor of lin (PUL _ TX _ Max)/(lin (PUL _ TX _ Band1) + lin (PUL _ TX _ Band2)),

lin (PUL _ TX _ Band1_ Real) is a lin (PUL _ TX _ Band1) factor, and

lin (PUL _ TX _ Band2_ Real) is a lin (PUL _ TX _ Band2) factor.

In some implementations, the particular method that the STA 102 takes when power is limited may be determined according to standard specifications, configurations stored in the STA 102, or indications included in DL frames.

Although the power control operation shown in fig. 3 includes two frequency bands, this approach may be applied to simultaneous transmission over more than two frequency bands. For example, a trigger frame transmitted on frequency band1 may indicate that the STA 102 transmits on three or more UL frequency bands. The trigger frame may also include a target UL received power level for each of these UL bands, and a path loss difference between band1 and each UL band other than band 1. In some cases, the AP 104 may implicitly indicate the path-loss difference by incorporating the metric in the indication of the target UL received power level, rather than explicitly including the path-loss difference in the trigger frame as shown in fig. 3. This approach can reduce overhead by reducing the amount of information transmitted in the DL frame.

Fig. 4 is a diagram 400 of such an exemplary power control operation for multiband transmission provided by one implementation. For clarity of presentation, the following description generally describes operations in the context of other figures in this description. This operation may be implemented by communication devices, such as the AP 104 and the STAs 102 shown in fig. 1. However, it should be understood that the operations may optionally be performed by any suitable system, environment, software, and hardware, or combination of systems, environments, software, and hardware, for example. In some implementations, the various steps of the operations may be performed in parallel, in combination, in a loop, or in any order.

At 410, the AP 104 determines a resource allocation for one or more STAs. In the illustrated example, frequency resources of two different bands (band 1 and band2) are allocated to the STAs 102. The AP 104 also determines Target UL received power levels UL _ Target _ RSSI _ Band1 and UL _ Target _ RSSI _ Band2 for the two UL frequency bands.

In 420, the AP 104 transmits a DL frame to the STA 102 on frequency band 1. In some cases, the DL frame may be referred to as a trigger frame. Similar to fig. 3, the DL frame includes UL scheduling information for STAs 102 to transmit simultaneously on two bands (band 1 and band 2). The DL frame includes a first indication indicating the transmit power level, denoted PDL _ TX, that the AP 104 uses to transmit the DL frame on frequency band 1. The DL frame also includes a second indication indicating a first Target power level on frequency Band1, denoted as UL _ Target _ RSSI _ Band 1.

The DL frame also includes a third indication indicating a second target power level on the second frequency band. However, the second Target power level in this example does not represent the actual second Target power level (UL _ Target _ RSSI _ Band2) as shown in fig. 3. Conversely, the second Target power level represents a Virtual second Target power level, denoted as UL _ Virtual _ Target _ RSSI _ Band 2.

The virtual Target UL received power on Band2 is a combination of the actual Target UL received power on Band2 (UL _ Target _ RSSI _ Band2) and the path loss difference (PLDiff) between the AP 104 and the STA 102 on Band1 and Band2 described earlier.

The AP 104 may determine UL _ Virtual _ Target _ RSSI _ Band2 using the following equation:

UL_Virtual_Target_RSSI_Band2＝UL_Target_RSSI_Band2+PLDiff。

at 430, the STA 102 determines transmit power levels on band1 and band 2. Similar to fig. 3, the STA 102 may measure PDL _ RX _ Band1 and calculate PL _ Band1_ STA. The STA 102 may also determine PUL _ TX _ Band1 from PL _ Band1_ STA and UL _ Target _ RSSI _ Band1 using the following equation:

PUL_TX_Band1＝UL_Target_RSSI_Band1+PL_Band1_STA。

STA 102 may also determine PUL _ TX _ Band2 from PL _ Band1_ STA and UL _ Virtual _ Target _ RSSI _ Band2 using the following equation:

PUL_TX_Band2＝UL_Virtual_Target_RSSI_Band2+PL_Band1_STA。

note that in this case, unlike fig. 3, the STA 102 determines the PUL _ TX _ Band2 using the virtual UL reception target power on Band2 and the path loss on Band 1.

In 440, the STA 102 transmits data simultaneously on Band1 and Band2 according to PUL _ TX _ Band1 and PUL _ TX _ Band 2. As described above, the STA 102 may transmit at transmit power levels PUL TX _ Band1 and PUL TX _ Band2 if the sum of these levels does not exceed the maximum transmit power of the STA 102. Alternatively, the STA 102 may adjust the transmit power by prioritizing transmissions on one of the frequency bands, or scaling the transmit power.

FIG. 5 is a flow diagram of an exemplary method 500 for power control in multiband operation provided by an implementation. For clarity of presentation, the following description generally describes method 500 in the context of other figures in this description. The method 500 may be implemented by an electronic device, such as the STA 102 shown in fig. 1. However, it should be understood that method 500 may optionally be performed by any suitable system, environment, software, and hardware, or combination of systems, environments, software, and hardware, for example. In some implementations, the various steps of the method 500 may be performed in parallel, in combination, in a loop, or in any order.

At 502, a station receives a wireless communication signal over a first frequency band. The wireless communication signal includes a frame. The frame includes resource allocation information for data transmission on the first frequency band and the second frequency band. The frame also includes a first indication indicating a first transmit power level of a signal on the first frequency band, a second indication indicating a first target power level on the first frequency band, and a third indication indicating a second target power level on the second frequency band.

At 504, the station determines a second transmit power level and a third transmit power level based on the first target power level, the second target power level, and the first transmit power level.

At 506, the station transmits data on the first frequency band using the first outgoing signal according to the second transmit power level and on the second frequency band using the second outgoing signal according to the third transmit power level.

Fig. 6 is a diagram 600 of an exemplary trigger frame provided by one implementation. The frame includes a MAC header 610 and a body 620. The MAC header 610 includes a frame control field 612, a duration field 614, a receiver address field 616, and a sender address field 618. The MAC header 610 may include more or fewer fields as shown. The body 620 may include a field 622 carrying UL scheduling information, a field 624 carrying a first indication indicating a first transmit power level of DL signals on the first frequency band, a field 626 carrying a second indication indicating a first target power level on the first frequency band, and a field 628 carrying a third indication indicating a second target power level on the second frequency band. In some cases, the body 620 may also include a field 630, the field 630 carrying a fourth indication indicating a path loss difference between a first path loss on the first frequency band and a second path loss on the second frequency band. In some cases, some of these indications may be carried in the same field. The MAC header 610 may also include more or fewer fields, as shown.

Fig. 7 is a block diagram of an exemplary terminal 700 provided in one implementation. The illustrated terminal 700 may be used to implement the STA 102 described above.

As shown, terminal 700 includes an input/output (I/O) interface 701. For example, I/O interface 701 may include one or more of the following: a screen or a touch screen (e.g., a Liquid Crystal Display (LCD), a Light Emitting Display (LED), an Organic Light Emitting Display (OLED), a micro-electro-mechanical system (MEMS) display), a keyboard or a keypad, a trackball, a speaker, and a microphone. For example, the I/O interface 701 may include a Universal Serial Bus (USB) interface.

The terminal 700 comprises a transmitter 702. The transmitter 702 may include components such as digital-to-analog (D/a) components, Automatic Gain Control (AGC) circuitry, and other Radio Frequency (RF) components that convert a baseband signal to an RF signal for transmission. The transmitter 702 is coupled to one or more antennas 708 that transmit the RF signals. Each of the one or more antennas 708 may be used to transmit on the same or different frequency bands. In some cases, transmitter 702 may include more than one transmitter branch. Each branch may provide RF signals to a different antenna for transmission over a different frequency band, or any combination thereof.

The terminal 700 comprises a receiver 706. The receiver 706 may include components such as analog-to-digital (a/D) components, Automatic Gain Control (AGC) circuitry, and other Radio Frequency (RF) components that convert a received RF signal to a baseband signal. The receiver 706 is coupled to one or more antennas 708 that receive the RF signals. Each of the one or more antennas 708 may be used for reception on the same or different frequency bands. In some cases, receiver 706 may include more than one receiver branch. Each branch may process RF signals for different antennas received on different frequency bands, or any combination thereof. The transmitter 702 and receiver 706 may share an antenna 708, or may be coupled to different antennas or groups of antennas 708. The transmitter 702 and the receiver 706 may share circuitry or may be combined into a transceiver.

The terminal 700 includes a memory 704. Memory 704 may include a computer-readable storage medium that may store an Operating System (OS) of terminal 700 and various other computer-executable instructions, logic, or software programs for performing one or more of the procedures, steps, or actions described above. The memory 704 may also store information and may be coupled to the processor 705. The memory 704 may be incorporated in a single device or may comprise multiple memories/devices.

The terminal 700 includes a processor 705. Processor 705 may include one or more processing components (also referred to as "processors") that may execute instructions related to one or more processes, steps, or actions described in connection with one or more implementations disclosed herein. The processor 705 may include a microprocessor, Central Processing Unit (CPU), graphics processing unit, processing core, digital signal processor, or other type of computing device. The processor 705 may also include other auxiliary components such as a Random Access Memory (RAM) and a read-only memory (ROM).

Processor 705 may be coupled to one or more of I/O interface 701, transmitter 702, receiver 706, and may provide control signals to these components, receive signals (e.g., parameters, settings, measurements, etc.) from these components, or both. The processor 705 may also be used to perform various transmit processing functions, receive processing functions, or both, which may be implemented by executable code stored in the memory 704. The techniques described above may also be implemented by executable code stored in memory 704, which may be executed in processor 705. Terminal 700 can also include various other components.

Fig. 8 is a block diagram of an exemplary network device 800 provided by one implementation. The illustrated network device 800 may be used to implement the AP 104 described above.

As shown, device 800 includes an input/output (I/O) interface 801. For example, the I/O interface 801 may include one or more of the following: a screen or a touch screen (e.g., a Liquid Crystal Display (LCD), a Light Emitting Display (LED), an Organic Light Emitting Display (OLED), a micro-electro-mechanical system (MEMS) display), a keyboard or a keypad, a trackball, a speaker, and a microphone. For example, the I/O interface 801 may include a Universal Serial Bus (USB) interface.

The device 800 includes a transmitter 802. The transmitter 802 may include components such as digital-to-analog (D/a) components, Automatic Gain Control (AGC) circuitry, and other Radio Frequency (RF) components that convert a baseband signal to an RF signal for transmission. The transmitter 802 is coupled to one or more antennas 808 that transmit RF signals. Each of the one or more antennas 808 may be used to transmit on the same or different frequency bands. In some cases, transmitter 802 may include more than one transmitter branch. Each branch may provide RF signals to a different antenna for transmission over a different frequency band, or any combination thereof.

The device 800 includes a receiver 806. The receiver 806 may include components such as analog-to-digital (a/D) components, Automatic Gain Control (AGC) circuitry, and other Radio Frequency (RF) components that convert a received RF signal to a baseband signal. The receiver 806 is coupled to one or more antennas 808 that receive the RF signals. Each of the one or more antennas 808 may be used for reception on the same or different frequency bands. In some cases, receiver 806 may include more than one receiver branch. Each branch may process RF signals for different antennas received on different frequency bands, or any combination thereof. The transmitter 802 and the receiver 806 may share an antenna 808 or may be coupled to different antennas or groups of antennas 808. The transmitter 802 and the receiver 806 may share circuitry or may be combined into a transceiver.

The device 800 includes a memory 804. Memory 804 may include a computer-readable storage medium that may store an Operating System (OS) of device 800 and various other computer-executable instructions, logic, or software programs for performing one or more of the processes, steps, or actions described above. The memory 804 may also store information and may be coupled to the processor 805. The memory 804 may be incorporated in a single device or may comprise multiple memories/devices.

The device 800 includes a processor 805. The processor 805 may include one or more processing components (also referred to as "processors") that may execute instructions related to one or more processes, steps, or actions described herein in connection with one or more implementations disclosed herein. The processor 805 may include a microprocessor, Central Processing Unit (CPU), graphics processing unit, processing core, digital signal processor, or other type of computing device. The processor 805 may also include other auxiliary components, such as a Random Access Memory (RAM) and a read-only memory (ROM).

The processor 805 may be coupled to one or more of the I/O interface 801, the transmitter 802, the receiver 806, and may provide control signals to these components, receive signals (e.g., parameters, settings, measurements, etc.) from these components, or both. The processor 805 may also be used to perform various transmit processing functions, receive processing functions, or both, which may be implemented by executable code stored in the memory 804. The techniques described above may also be implemented by executable code stored in memory 804, which may be executed in processor 805. Device 800 may also include various other components. Various embodiments of the present invention have been described.

Although fig. 7 and 8 illustrate the use of a processor and memory, various other implementations of the various functions performed by these components may alternatively or additionally be implemented in other ways, such as, but not limited to, field-programmable gate arrays (FPGAs), look-up tables (LUTs), and state machines.

The

antennas

708 and 808 shown in fig. 7 and 8 may be used to implement various types of signal transmission schemes that may include, but are not limited to, multiple-input/multiple-output (MIMO), single-input/single-output (SISO), and multiple-input/single-output (MISO). Encoding and decoding may be achieved with the goal of precoding to accommodate such transmission schemes.

Fig. 9 is a diagram illustrating an exemplary structure of a terminal 900 described in the present invention according to an implementation manner. Terminal 900 includes receive circuitry 902, power level determination circuitry 904, and transmit circuitry 906. In some implementations, terminal 900 can also include one or more circuits for performing any one or combination of steps described in the present disclosure.

The receive circuit 902 is configured to receive wireless communication signals in a first frequency band. The wireless communication signal includes a frame. The frame includes resource allocation information for data transmission on the first frequency band and the second frequency band. The frame also includes a first indication indicating a first transmit power level of a signal on the first frequency band, a second indication indicating a first target power level on the first frequency band, and a third indication indicating a second target power level on the second frequency band.

Power level determination circuitry 904 is configured to determine a second transmit power level and a third transmit power level based on the first target power level, the second target power level, and the first transmit power level.

Transmit circuitry 906 is configured to transmit data on the first frequency band using the first outgoing signal according to the second transmit power level and on the second frequency band using the second outgoing signal according to the third transmit power level.

Fig. 10 is a diagram of an exemplary structure of an AP 1000 described in the present invention provided by an implementation. The AP 1000 includes a receiving circuit 1002, a power level determining circuit 1004, and a transmitting circuit 1006. In some implementations, the AP 1000 may also include one or more circuits to perform any one or combination of steps described in the present invention.

The receive circuitry 1002 is configured to receive UL transmissions from STAs on one or more frequency bands.

The power level determination circuit 1004 is configured to determine a second indication indicative of a first target power level on the first frequency band and a third indication indicative of a second target power level on the second frequency band. In some cases, the power level determination circuit 1004 may determine one or more path loss differences.

The transmission circuit 1006 is used for transmitting wireless communication signals. The wireless communication signal includes a frame. The frame includes resource allocation information for data transmission on the first frequency band and the second frequency band. The frame also includes a first indication indicating a first transmit power level of a signal on the first frequency band, a second indication indicating a first target power level on the first frequency band, and a third indication indicating a second target power level on the second frequency band.

Implementations of the present subject matter may include one or more features, either alone or in combination.

The above and other described implementations can each optionally include one or more of the following features.

The first feature may be combined with any one of the following features, wherein the frame further comprises a fourth indication indicating a path loss difference between a first path loss on the first frequency band and a second path loss on the second frequency band.

Second features may be combined with any of the above or with any of the following, wherein the determining, by the station, the second transmit power level and the third transmit power level comprises: determining a received power level of the wireless communication signal; determining the first path loss according to the received power level and the first transmit power level; determining the second path loss according to the first path loss and the path loss difference; determining the second transmit power level based on the first path loss and the first target power level; determining the third transmit power level based on the second path loss and the second target power level.

Third features may be combined with any of the above or with any of the following, wherein the determining, by the station, the second transmit power level and the third transmit power level comprises: determining a received power level of the wireless communication signal; determining a first path loss according to the received power level and the first transmit power level; determining the second transmit power level based on the first path loss and the first target power level; determining the third transmit power level based on the first path loss and the second target power level.

The fourth feature may be combined with any one of the above or below, wherein the second target power level comprises a sum of a received target power level over the second frequency band and a path loss difference between a first path loss over the first frequency band and a second path loss over the second frequency band.

The fifth feature may be combined with any of the above or below, wherein the transmitting, by the station, data on the first frequency band and the second frequency band according to the second transmit power level and the third transmit power level comprises: determining that a sum of the second transmit power level and the third transmit power level exceeds a transmit power threshold; upon determining that the sum of the second transmit power level and the third transmit power level exceeds the transmit power threshold: transmitting on the first frequency band using a minimum of the second transmit power level and the transmit power threshold; transmitting on the second frequency band using a remaining power level.

A sixth feature that may be combined with any of the above or below, wherein the transmitting, by the station, data on the first frequency band and the second frequency band according to the second transmit power level and the third transmit power level includes: determining that a sum of the second transmit power level and the third transmit power level exceeds a transmit power threshold; upon determining that the sum of the second transmit power level and the third transmit power level exceeds the transmit power threshold: determining a scaling factor based on a ratio between the transmit power threshold and the sum of the second transmit power level and the third transmit power level; determining a scaled second transmit power level based on the scaling factor and the second transmit power level; determining a scaled third transmit power level based on the scaling factor and the third transmit power level; transmitting on the first frequency band using the scaled second transmit power level; transmitting on the second frequency band using the scaled third transmit power level.

The seventh feature in combination with any feature above, wherein the transmitting, by the station, data on the first frequency band and the second frequency band based on the second transmit power level and the third transmit power level comprises: determining that a sum of the second transmit power level and the third transmit power level does not exceed a transmit power threshold; upon determining that the sum of the second transmit power level and the third transmit power level does not exceed the transmit power threshold: transmitting on the first frequency band using the second transmit power level; transmitting on the second frequency band using the third transmit power level.

The second features may be combined with any of the above or below, wherein the one or more hardware processors execute the instructions to: determining a received power level of the wireless communication signal; determining the first path loss according to the received power level and the first transmit power level; determining the second path loss according to the first path loss and the path loss difference; determining the second transmit power level based on the first path loss and the first target power level; determining the third transmit power level based on the second path loss and the second target power level.

The third features may be combined with any of the above or below, wherein the one or more hardware processors execute the instructions to: determining a received power level of the wireless communication signal; determining a first path loss according to the received power level and the first transmit power level; determining the second transmit power level based on the first path loss and the first target power level; determining the third transmit power level based on the first path loss and the second target power level.

The fifth feature may be combined with any one of the features described above or below, wherein the one or more hardware processors execute the instructions to: determining that a sum of the second transmit power level and the third transmit power level exceeds a transmit power threshold; upon determining that the sum of the second transmit power level and the third transmit power level exceeds the transmit power threshold: transmitting on the first frequency band using a minimum of the second transmit power level and the transmit power threshold; transmitting on the second frequency band using a remaining power level.

The sixth feature may be combined with any one of the features above or below, wherein the one or more hardware processors execute the instructions to: determining that a sum of the second transmit power level and the third transmit power level exceeds a transmit power threshold; upon determining that the sum of the second transmit power level and the third transmit power level exceeds the transmit power threshold: determining a scaling factor based on a ratio between the transmit power threshold and the sum of the second transmit power level and the third transmit power level; determining a scaled second transmit power level based on the scaling factor and the second transmit power level; determining a scaled third transmit power level based on the scaling factor and the third transmit power level; transmitting on the first frequency band using the scaled second transmit power level; transmitting on the second frequency band using the scaled third transmit power level.

The seventh feature in combination with any of the above features, wherein the one or more hardware processors execute the instructions to: determining that a sum of the second transmit power level and the third transmit power level does not exceed a transmit power threshold; upon determining that the sum of the second transmit power level and the third transmit power level does not exceed the transmit power threshold: transmitting on the first frequency band using the second transmit power level; transmitting on the second frequency band using the third transmit power level.

Implementations of the subject matter and the functional operations described in this specification can be implemented in digital electronic circuitry, tangibly embodied in computer software or firmware, in computer hardware, including the structures disclosed in this specification and their structural equivalents, or in combinations of one or more of them. Implementations of the subject matter described in this specification can be implemented as one or more computer programs, i.e., one or more modules of computer program instructions, encoded on a tangible, non-transitory computer-readable storage medium for execution by, or to control the operation of, data processing apparatus. Alternatively or in addition, the program instructions may be encoded in an artificially generated propagated signal (e.g., a machine-generated electrical, optical, or electromagnetic signal) that is generated to encode information for transmission to suitable receiver apparatus for execution by data processing apparatus. The computer storage medium may be a machine-readable storage device, a machine-readable storage substrate, a random or serial access storage device, or a combination of computer storage media.

The terms "real-time/real time", "real (fast) time, RFT", "near real-time (near (ly) real-time, NRT)", "near real-time", or similar terms (as understood by one of ordinary skill in the art) mean that the actions and responses are close in time such that the individual perceived actions and responses occur substantially simultaneously. For example, the time difference in response to the display of data (or the display initiation) may be less than 1ms, less than 1 second, or less than 5 seconds after the action of the individual accessing the data. Although the requested data need not be displayed (or launched for display) immediately, the requested data is still displayed (or launched for display) without any intentional delay, taking into account the processing limitations of the computing system and the time required to collect, accurately measure, analyze, process, store, or transmit the data, etc.

The terms "data processing apparatus," "computer," or "electronic computer device" (or equivalents thereof as understood by those of ordinary skill in the art) refer to data processing hardware and encompass various types of apparatus, devices, and machines for processing data, including programmable processors, computers, or multiple processors or computers. The apparatus may also be or further include special purpose logic circuitry, such as a Central Processing Unit (CPU), Field Programmable Gate Array (FPGA), or application-specific integrated circuit (ASIC). In some implementations, the data processing apparatus or dedicated logic circuit (or a combination of the data processing apparatus or dedicated logic circuit) may be hardware or software based (or a combination of hardware and software based). The apparatus can optionally include code that creates an execution environment for the computer program, e.g., code that constitutes processor firmware, a protocol stack, a database management system, an operating system, or a combination of execution environments. The present invention contemplates the use of a data processing apparatus with or without a conventional operating system such as LINUX, UNIX, WINDOWS, MAC OS, ANDROID, IOS or any other suitable conventional operating system.

A computer program (which can also be referred to or described as a program, software application, module, software module, script, or code) can be written in any form of programming language, including compiled or interpreted languages, or declarative or procedural languages, and can be deployed in any form, including as a stand-alone program or as a module, component, subroutine, or other unit suitable for use in a computing environment. A computer program may (but need not) correspond to a file in a file system. A program can be stored in a portion of a file that includes other programs or data (e.g., one or more scripts stored in a markup language document), in a single file dedicated to the program in question, or in multiple coordinated files (e.g., files that store one or more modules, sub programs, or portions of code). A computer program can be deployed to be executed on one computer or on multiple computers that are located at one site or distributed across multiple sites and interconnected by a communication network. While the portions of the program shown in the various figures are illustrated as separate modules implementing the various features and functions through various objects, methods, or other processes, the program may instead include a number of sub-modules, third party services, components, libraries, etc., as appropriate. Conversely, the features and functionality of the various components may be combined into a single component as appropriate. The threshold for making computational decisions may be static, dynamic, or a combination of static and dynamic.

The methods, processes, or logic flows described in this specification can be performed by one or more programmable computers executing one or more computer programs to perform functions by operating on input data and generating output. The methods, processes, or logic flows can also be performed by, and apparatus can also be implemented as, special purpose logic circuitry, e.g., a CPU, FPGA, or ASIC.

A computer suitable for the execution of a computer program may be based on a general purpose or special purpose microprocessor, or any other type of CPU. Typically, the CPU receives instructions and data from ROM or Random Access Memory (RAM) or both. The essential elements of a computer are a CPU for executing instructions and one or more memory devices for storing instructions and data. Generally, a computer will also include, or be operatively coupled to receive data from or transfer data to, or both, one or more mass storage devices for storing data, e.g., magnetic, magneto-optical disks, or optical disks. However, a computer need not have such devices. In addition, the computer may be embedded in other devices, such as a mobile phone, a Personal Digital Assistant (PDA), a mobile audio or video player, a game player, a Global Positioning System (GPS) receiver, a portable memory device (e.g., a Universal Serial Bus (USB) flash drive), or the like.

Computer-readable media (whether transient or non-transient as appropriate) suitable for storing computer program instructions and data include non-volatile memory, media and storage devices, including by way of example semiconductor memory devices, such as erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), and flash memory devices; magnetic disks, such as internal hard disks or removable disks; magneto-optical disks; CD-ROM, DVD +/-R, DVD-RAM, and DVD-ROM disk. The memory may store various objects or data, including caches, categories, frames, applications, backup data, tasks, web pages, web page templates, database tables, repositories storing dynamic information, and any other suitable information including any parameters, variables, algorithms, instructions, rules, constraints, or references. Further, the memory may include any other suitable data, such as logs, policies, security or access data, reporting files, and other data. The processor and the memory can be supplemented by, or incorporated in, special purpose logic circuitry.

For purposes of interacting with a user, implementations of the subject matter described in this specification can be implemented in a computer having a display device, such as a Cathode Ray Tube (CRT), a Liquid Crystal Display (LCD), a Light Emitting Diode (LED), or a plasma monitor, for displaying information to the user and a keyboard and a pointing device (e.g., a mouse, trackball, or track pad), by which the user can provide input to the computer. Input to the computer may also be provided using a touch screen, such as a tablet computer surface with pressure sensitivity, a multi-touch screen using capacitive or inductive sensing, or other types of touch screens. Other types of devices may also be used to provide for interaction with a user; for example, feedback provided to the user can be any form of sensory feedback, such as visual feedback, auditory feedback, or tactile feedback; and input from the user may be received in any form, including acoustic, speech, or tactile input. Further, the computer may interact with the user by sending and receiving documents to and from the device used by the user; for example, by sending a web page to a web browser on the user's client device in response to a request received from the web browser.

The terms "graphical user interface" or "GUI" may be used in the singular or in the plural to describe one or more graphical user interfaces and each display of a particular graphical user interface. Thus, the GUI may represent any graphical user interface that processes information and efficiently presents the information results to a user, including but not limited to a web browser, touch screen, or Command Line Interface (CLI). Generally, a GUI may include a number of User Interface (UI) elements, some or all of which are associated with a web browser, such as interactive fields, drop-down lists, and buttons. These and other UI elements may be related to or represent functionality of a web browser.

Implementations of the subject matter described in this specification can be implemented in a computing system that includes a back-end component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front-end component (e.g., a client computer having a graphical user interface or a Web browser), through which a user can interact with an implementation of the subject matter described in this specification, or any combination of one or more such back-end, middleware, or front-end components. The components of the system can be interconnected by any form or medium of wired or wireless digital data communication (or combination of data communication), e.g., a communication network. Examples of communication networks include a Local Area Network (LAN), a Radio Access Network (RAN), a Metropolitan Area Network (MAN), a Wide Area Network (WAN), Worldwide Interoperability for Microwave Access (WIMAX), a Wireless Local Area Network (WLAN) (e.g., using 802.11a/b/g/n or 802.20 (or a combination of 802.11x and 802.20 or other protocols consistent with the present invention)), all or a portion of the internet, or any other communication system (or combination of communication networks) at one or more locations. For example, the network may communicate with Internet Protocol (IP) packets, frame relay frames, Asynchronous Transfer Mode (ATM) cells, voice, video, data, or other suitable information (or combination of communication types) between network addresses.

The computing system may include clients and servers. A client and server are generally remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other.

While this specification includes many specific implementation details, these should not be construed as limitations on the scope of any invention or of what may be claimed, but rather as descriptions of features that may be specific to particular implementations of particular inventions. In the context of separate implementations, certain features described in this specification can also be implemented in combination in a single implementation. Conversely, various features that are described in the context of a single implementation can also be implemented in multiple implementations separately or in any suitable subcombination. Furthermore, although features may be described above as acting in certain combinations and even initially claimed as such, one or more features from a claimed combination can in some cases be excised from the combination, and the claimed combination may be directed to a subcombination or variation of a subcombination.

Particular implementations of the present subject matter have been described. Other implementations, modifications, and arrangements of the described implementations, which are within the scope of the appended claims, will be apparent to those of skill in the art. Although operations may be depicted in the drawings or claims as occurring in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order, or that all operations shown be performed (some operations may be considered optional) to achieve desirable results. In some cases, multitasking or parallel processing (or a combination of multitasking and parallel processing) may be advantageous and may be performed as appropriate.

Moreover, the separation or integration of various system modules and components in the implementations previously described should not be understood as requiring such separation or integration in all implementations, and it should be understood that the described program components and systems can generally be integrated together in a single software product or packaged into multiple software products.

Accordingly, the exemplary implementations described previously do not define or limit the invention. Other changes, substitutions, and alterations are also possible without departing from the spirit and scope of this disclosure.

Moreover, any claimed implementation is considered to be suitable for use with at least one computer-implemented method; a non-transitory computer readable medium storing computer readable instructions to perform a computer-implemented method; and a computer system comprising a computer memory interoperably coupled with a hardware processor for performing a computer-implemented method or instructions stored in a non-transitory computer-readable medium.

Claims

1. A method for communicating in a wireless system, the method comprising:

a station receiving a wireless communication signal on a carrier in a first frequency band, wherein the wireless communication signal comprises a frame, the frame comprises resource allocation information for data transmission in the first frequency band and a second frequency band, the frame further comprises a first indication indicating a first transmission power level of the wireless communication signal in the first frequency band, a second indication indicating a first target power level in the first frequency band, and a third indication indicating a second target power level in the second frequency band;

the station determines a second transmission power level and a third transmission power level according to the first target power level, the second target power level and the first transmission power level;

the station transmits data on the first frequency band using a first outgoing signal according to the second transmit power level and on the second frequency band using a second outgoing signal according to the third transmit power level.

2. The method of claim 1, wherein the frame further comprises a fourth indication indicating a path loss difference between a first path loss on the first frequency band and a second path loss on the second frequency band.

3. The method of claim 2, wherein the determining, by the station, the second transmit power level and the third transmit power level comprises:

determining a received power level of the wireless communication signal;

determining the first path loss according to the received power level and the first transmit power level;

determining the second path loss according to the first path loss and the path loss difference;

determining the second transmit power level based on the first path loss and the first target power level;

determining the third transmit power level based on the second path loss and the second target power level.

4. The method of claim 1, wherein the determining, by the station, the second transmit power level and the third transmit power level comprises:

determining a received power level of the wireless communication signal;

determining a first path loss according to the received power level and the first transmit power level;

determining the third transmit power level based on the first path loss and the second target power level.

5. The method of claim 4, wherein the second target power level comprises a sum of a received target power level on the second frequency band and a path loss difference between a first path loss on the first frequency band and a second path loss on the second frequency band.

6. The method of any of claims 1 to 5, wherein the transmitting, by the station, data on the first frequency band and the second frequency band according to the second transmit power level and the third transmit power level comprises:

determining that a sum of the second transmit power level and the third transmit power level exceeds a transmit power threshold;

upon determining that the sum of the second transmit power level and the third transmit power level exceeds the transmit power threshold:

transmitting on the first frequency band using a minimum of the second transmit power level and the transmit power threshold;

transmitting on the second frequency band using a remaining power level.

7. The method of any of claims 1 to 5, wherein the transmitting, by the station, data on the first frequency band and the second frequency band according to the second transmit power level and the third transmit power level comprises:

determining a scaling factor based on a ratio between the transmit power threshold and the sum of the second transmit power level and the third transmit power level;

determining a scaled second transmit power level based on the scaling factor and the second transmit power level;

determining a scaled third transmit power level based on the scaling factor and the third transmit power level;

transmitting on the first frequency band using the scaled second transmit power level;

transmitting on the second frequency band using the scaled third transmit power level.

8. The method of any of claims 1 to 5, wherein the transmitting, by the station, data on the first frequency band and the second frequency band according to the second transmit power level and the third transmit power level comprises:

determining that a sum of the second transmit power level and the third transmit power level does not exceed a transmit power threshold;

upon determining that the sum of the second transmit power level and the third transmit power level does not exceed the transmit power threshold:

transmitting on the first frequency band using the second transmit power level;

transmitting on the second frequency band using the third transmit power level.

9. A station, comprising:

a non-transitory memory including instructions;

one or more hardware processors in communication with the memory, wherein the one or more hardware processors execute the instructions to:

receiving a wireless communication signal on a first frequency band, wherein the wireless communication signal comprises a frame, the frame comprising resource allocation information for data transmission on the first frequency band and a second frequency band, the frame further comprising a first indication indicating a first transmit power level of the wireless communication signal on the first frequency band, a second indication indicating a first target power level on the first frequency band, and a third indication indicating a second target power level on the second frequency band;

determining a second transmit power level and a third transmit power level based on the first target power level, the second target power level, and the first transmit power level;

transmitting data on the first frequency band using a first outgoing signal according to the second transmit power level and on the second frequency band using a second outgoing signal according to the third transmit power level.

10. The station of claim 9, wherein the frame further comprises a fourth indication indicating a path loss difference between a first path loss on the first frequency band and a second path loss on the second frequency band.

11. The station of claim 10, wherein the one or more hardware processors execute the instructions to:

determining a received power level of the wireless communication signal;

12. The station of claim 9, wherein the one or more hardware processors execute the instructions to:

determining a received power level of the wireless communication signal;

13. The station of claim 12, wherein the second target power level comprises a sum of a received target power level on the second frequency band and a path loss difference between a first path loss on the first frequency band and a second path loss on the second frequency band.

14. The station of any one of claims 9 to 13, wherein the one or more hardware processors execute the instructions to:

transmitting on the second frequency band using a remaining power level.

15. The station of any one of claims 9 to 13, wherein the one or more hardware processors execute the instructions to:

16. The station of any one of claims 9 to 13, wherein the one or more hardware processors execute the instructions to:

transmitting on the first frequency band using the second transmit power level;

transmitting on the second frequency band using the third transmit power level.

17. A non-transitory computer-readable medium storing computer instructions that, when executed by one or more hardware processors, cause the one or more hardware processors to perform operations comprising:

a station receiving a wireless communication signal on a first frequency band, wherein the wireless communication signal comprises a frame, the frame comprises resource allocation information for data transmission on the first frequency band and a second frequency band, the frame further comprises a first indication indicating a first transmission power level of the wireless communication signal on the first frequency band, a second indication indicating a first target power level on the first frequency band, and a third indication indicating a second target power level on the second frequency band;

18. The non-transitory computer-readable medium of claim 17, wherein the frame further comprises a fourth indication indicating a path loss difference between a first path loss on the first frequency band and a second path loss on the second frequency band.

19. The non-transitory computer-readable medium of claim 18, wherein the determining, by the station, the second transmit power level and the third transmit power level comprises:

determining a received power level of the wireless communication signal;

20. The non-transitory computer-readable medium of claim 17, wherein the station determining the second transmit power level and the third transmit power level comprises:

determining a received power level of the wireless communication signal;

21. The non-transitory computer-readable medium of claim 20, wherein the second target power level comprises a sum of a received target power level over the second frequency band and a path loss difference between a first path loss over the first frequency band and a second path loss over the second frequency band.

22. The non-transitory computer-readable medium of any one of claims 17-21, wherein the transmitting, by the station, data on the first frequency band and the second frequency band according to the second transmit power level and the third transmit power level comprises:

transmitting on the second frequency band using a remaining power level.

23. The non-transitory computer-readable medium of any one of claims 17-21, wherein the transmitting, by the station, data on the first frequency band and the second frequency band according to the second transmit power level and the third transmit power level comprises:

24. The non-transitory computer-readable medium of any one of claims 17-21, wherein the transmitting, by the station, data on the first frequency band and the second frequency band according to the second transmit power level and the third transmit power level comprises:

transmitting on the first frequency band using the second transmit power level;

transmitting on the second frequency band using the third transmit power level.