CN112804742B

CN112804742B - Method, device and system for configuring transmitting power and computer storage medium

Info

Publication number: CN112804742B
Application number: CN201911109148.8A
Authority: CN
Inventors: 邱正; 魏志芯; 何东
Original assignee: Huawei Digital Technologies Suzhou Co Ltd
Current assignee: Huawei Digital Technologies Suzhou Co Ltd
Priority date: 2019-11-13
Filing date: 2019-11-13
Publication date: 2023-05-09
Anticipated expiration: 2039-11-13
Also published as: CN112804742A

Abstract

The application discloses a method, a device and a system for configuring transmitting power and a computer storage medium, and belongs to the technical field of wireless communication. The method comprises the following steps: the control device obtains radio frequency environment information of an AP in the WLAN, the radio frequency environment information including a distance between the AP and an STA in the WLAN to which the AP is connected. The control device determines a target transmission power of the STA according to the radio frequency environment information, the target transmission power being positively correlated with a distance between the AP and the STA. The control device sends a target message to the AP, wherein the target message carries target transmitting power. The method and the device improve the communication reliability between the STA and the AP.

Description

Method, device and system for configuring transmitting power and computer storage medium

Technical Field

The present invention relates to the field of wireless communications technologies, and in particular, to a method, an apparatus, a system, and a computer storage medium for configuring transmit power.

Background

Wireless local area networks (wireless local area network, WLAN), commonly referred to as wireless high-fidelity (wireless fidelity, wi-Fi) communication networks, employ standards of the institute of electrical and electronics engineers (Institute of Electrical and Electronics Engineers, IEEE) 802.11 family of standards. The WLAN includes an Access Point (AP) and a Station (STA). The STA refers to a terminal device provided with a wireless access function, such as a smart phone, a notebook computer, and the like. The AP is used to provide a bridging function between the wired network and the wireless network. One end of the AP is connected with the distributed system through a wired network, and the other end of the AP is connected with the STA through a wireless network. Wherein the distributed system is located in a backbone network (ethernet is typically used as the backbone network) for forwarding data between APs.

Currently, when a STA in a WLAN communicates with an AP, the STA typically uses a fixed transmit power to transmit data to the AP, for example, the STA may use a regulatory limit value specified by a country (country) cell as the transmit power to transmit data to the AP, where the country cell is a cell defined in the 802.11 series standard for carrying the regulatory limit value of the transmit power of the STA.

However, since the signal strength of data is positively correlated with the transmit power used when the STA transmits the data, and the greater the signal strength, the farther the signal travels in the channel, when the transmit power used by the STA is too large, the signal interference range is large and the interference degree to other STAs is large, and when the transmit power used by the STA is too small, the AP may not receive the data transmitted by the STA. The reliability of communication between STA and AP is currently low.

Disclosure of Invention

The application provides a transmitting power configuration method, a transmitting power configuration device, a transmitting power configuration system and a computer storage medium, which can solve the problem of low communication reliability between an STA and an AP.

In a first aspect, a transmit power configuration method is provided. The control device obtains radio frequency environment information of an AP in the WLAN, the radio frequency environment information including a distance between the AP and STAs in the WLAN to which the AP is connected. The control device determines a target transmission power of the STA according to the radio frequency environment information, the target transmission power being positively correlated with a distance between the AP and the STA. The control device sends a target message to the AP, wherein the target message carries target transmitting power.

In the application, the control device determines the target transmitting power of the STA connected with the AP according to the radio frequency environment information of the AP, and the control device determines the target transmitting power of the STA according to the actual communication environment of the AP and the STA because the radio frequency environment information of the AP includes the distance between the AP and the STA connected with the AP and the target transmitting power of the STA determined by the control device is positively correlated with the distance between the AP and the STA. Therefore, the phenomenon that the signal interference range is large and the interference degree to other STAs is large due to the fact that the STA adopts excessive transmitting power can be avoided as much as possible while effective communication between the STA and the AP is ensured.

In one implementation, the radio frequency environment information further includes a channel frequency between the AP and the STA. The control device determines, according to the radio frequency environment information, a process of implementing the target transmit power of the STA, including:

the control device determines the amount of path loss between the AP and the STA based on the distance between the AP and the STA and the channel frequency between the AP and the STA. The control device determines a target transmit power based on an amount of path loss between the AP and the STA.

Optionally, the control device may be configured with an IEEE 802.11channel D fading model, and the control device inputs the acquired distance between the AP and the STA and the channel frequency between the AP and the STA into the IEEE 802.11channel D fading model, and acquires the path loss amount between the AP and the STA output by the IEEE 802.11channel D fading model.

In another implementation, the radio frequency environment information further includes an amount of shielding attenuation corresponding to the AP. The implementation process of determining the target transmission power by the control device according to the path loss amount between the AP and the STA includes:

and the control equipment determines the target transmitting power according to the path loss between the AP and the STA and the shielding attenuation corresponding to the AP. The shielding attenuation amount corresponding to the AP refers to signal attenuation amount caused by the influence of a shielding object in the environment when the STA located in the signal coverage area of the AP communicates with the AP. The shielding attenuation corresponding to the AP is determined by the environment in which the AP is located.

In yet another implementation, the radio frequency environment information further includes a channel bandwidth between the AP and the STA. The transmission power configuration method further comprises the following steps: the control device determines a target received signal strength indication value of the AP according to the channel bandwidth between the AP and the STA and the target received signal to noise ratio of the AP. The control device determines a process of implementing the target transmitting power according to the path loss between the AP and the STA and the shielding attenuation corresponding to the AP, including: the control equipment calculates the target transmitting power by adopting a target formula, wherein the target formula is as follows:

P _STA ＝RSSI-G _STA +PL+SF-G _AP 。

wherein P is _STA Is the target transmit power. The RSSI is a target received signal strength indicator value for the AP. G _STA Is the antenna gain of the STA. PL is the amount of path loss between an AP and an STA. SF is the shielding attenuation amount corresponding to AP. G _AP Is the antenna gain of the AP.

In the implementation manner, in the process of determining the target transmitting power, the control device considers not only the actual communication environment of the AP and the STA, but also the receiving signal to noise ratio of the AP, so that the communication quality between the STA and the AP can be ensured when the STA transmits data by adopting the target transmitting power determined by the control device.

Optionally, before the control device sends the target message to the AP, the control device generates the target message, where the target message includes an indication field and a data field, the data field includes a target transmit power, the indication field includes an identifier of the STA, and the indication field is used to indicate the AP to send the target transmit power to the STA.

In a second aspect, a transmit power configuration method is provided. An AP in the WLAN receives a target message sent by the control device, wherein the target message comprises target transmitting power of an STA in the WLAN connected by the AP. And the AP analyzes the target message to obtain target transmitting power. The AP sends the target transmit power to the STA in unicast.

Optionally, the implementation process of sending the target transmission power to the STA by the AP in a unicast manner includes:

The AP determines a local capability constraint field value in the capability constraint cell based on the target transmit power, the local capability constraint field value being equal to a difference between a regulatory limit value specified by the national cell and the target transmit power. The AP transmits a management frame including a capability constraint cell to the STA. The management frame may be, for example, a beacon frame defined in the IEEE 802.11 family of standards.

In a third aspect, a transmit power configuration method is provided. An STA in the WLAN receives a target transmit power sent by an AP in the WLAN to which the STA is connected. The STA transmits data to the AP using the target transmit power.

Alternatively, the STA may also select the transmission power with the smallest value among all the transmission powers that the STA can use to transmit data. Optionally, the STA is provided with a fixed transmit power. For example, the fixed transmit power may be a regulatory limit value specified by a national cell. When the fixed transmission power of the STA is greater than the target transmission power, the STA transmits data to the AP using the target transmission power. And when the fixed transmission power of the STA is smaller than the target transmission power, the STA adopts the fixed transmission power to transmit data to the AP. Because the STA uses a smaller value of transmit power to transmit data, the interference range of the signal can be smaller, and the interference degree to other STAs is smaller.

In a fourth aspect, a transmit power configuration apparatus is provided. The apparatus comprises a plurality of functional modules that interact to implement the method of the first aspect and embodiments thereof described above. The plurality of functional modules may be implemented based on software, hardware, or a combination of software and hardware, and the plurality of functional modules may be arbitrarily combined or divided based on the specific implementation.

In a fifth aspect, a transmit power configuration apparatus is provided. The apparatus comprises a plurality of functional modules that interact to implement the method of the second aspect and embodiments thereof described above. The plurality of functional modules may be implemented based on software, hardware, or a combination of software and hardware, and the plurality of functional modules may be arbitrarily combined or divided based on the specific implementation.

In a sixth aspect, a transmit power configuration apparatus is provided. The apparatus comprises a plurality of functional modules that interact to implement the method of the third aspect and embodiments thereof. The plurality of functional modules may be implemented based on software, hardware, or a combination of software and hardware, and the plurality of functional modules may be arbitrarily combined or divided based on the specific implementation.

In a seventh aspect, there is provided a transmission power configuration apparatus for controlling a device, the apparatus comprising: a processor and a memory; the memory is used for storing a computer program, and the computer program comprises program instructions; the processor is configured to invoke the computer program to implement the method for configuring transmission power according to any one of the first aspect.

In an eighth aspect, a transmit power configuration apparatus is provided for an AP in a WLAN, the apparatus comprising: a processor and a memory; the memory is used for storing a computer program, and the computer program comprises program instructions; the processor is configured to invoke the computer program to implement the method for configuring transmission power according to any one of the second aspects.

In a ninth aspect, a transmit power configuration apparatus is provided for a STA in a WLAN, the apparatus comprising: a processor and a memory; the memory is used for storing a computer program, and the computer program comprises program instructions; the processor is configured to invoke the computer program to implement the method for configuring transmission power according to any one of the third aspects.

In a tenth aspect, there is provided a transmission power configuration system, the transmission power configuration system including a control device, an AP in a WLAN, and an STA in the WLAN, the control device including the transmission power configuration apparatus of the fourth aspect or the seventh aspect, the AP including the transmission power configuration apparatus of the fifth aspect or the eighth aspect, the STA including the transmission power configuration apparatus of the sixth aspect or the ninth aspect.

In an eleventh aspect, there is provided a computer storage medium having instructions stored thereon which, when executed by a processor of a control device, implement a transmit power configuration method as in any of the first aspects above; alternatively, the instructions, when executed by a processor of an AP in a WLAN, implement a transmit power configuration method as described in any of the second aspects above; alternatively, the instructions, when executed by a processor of a STA in the WLAN, implement a transmit power configuration method as described in any of the third aspects above.

The beneficial effects that this application provided technical scheme brought include at least:

in the application, the control device determines the target transmitting power of the STA connected with the AP according to the radio frequency environment information of the AP, and the control device determines the target transmitting power of the STA according to the actual communication environment of the AP and the STA because the radio frequency environment information of the AP includes the distance between the AP and the STA connected with the AP and the target transmitting power of the STA determined by the control device is positively correlated with the distance between the AP and the STA. Therefore, the phenomenon that the signal interference range is large and the interference degree to other STAs is large due to the fact that the STA adopts excessive transmitting power can be avoided as much as possible while effective communication between the STA and the AP is ensured. The reliability of communication between the STA and the AP is improved.

Drawings

Fig. 1 is a schematic structural diagram of a transmission power configuration system according to an embodiment of the present application;

fig. 2 is a flow chart of a method for configuring transmission power according to an embodiment of the present application;

FIG. 3 is a schematic diagram of a capability constraint cell format provided by an embodiment of the present application;

fig. 4 is a schematic structural diagram of a transmit power configuration device according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of another transmission power configuration device according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of still another transmission power configuration apparatus according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of a transmission power configuration device according to another embodiment of the present application;

fig. 8 is a schematic structural diagram of a transmit power configuration device according to still another embodiment of the present application;

fig. 9 is a block diagram of a transmit power configuration apparatus provided in an embodiment of the present application.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a transmission power configuration system according to an embodiment of the present application. As shown in fig. 1, the transmission power configuration system includes: the control device 101 controls the AP102 and STAs 103A-103E (collectively referred to as STAs 103) in the WLAN. Of course, a plurality of APs 102 may be included in the WLAN, and the plurality of APs 102 are connected to the control apparatus 101, respectively. The number of APs and STAs in fig. 1 is for illustration only and is not intended to be a limitation on the WLAN provided by the embodiments of the present application.

The control device 101 is connected to the AP102 via a wired network or a wireless network, and the AP102 is connected to the STA103 via a wireless network. The control device 101 may be a radio network controller, a network management device, a gateway, or other device with control capability. The control device 101 may be one device or a plurality of devices. The AP102 may be a network device with a Wi-Fi chip, such as a router or the like capable of providing access functions or services. The AP102 in the embodiment of the present application may be a thin AP (fit AP), configured and managed by the control device 101. The STA103 may be a terminal device supporting Wi-Fi communication functions, such as a mobile phone, a tablet computer, a set top box, a smart television, a smart wearable device, an in-vehicle communication device, or a computer, etc.

Optionally, the transmission power configuration system provided by the embodiment of the application can be applied to WLAN high-density scenes. WLAN high-density scenarios refer to scenarios where AP deployment is relatively dense and user concentration is high. For example, WLAN high density scenarios include airport lounge, train station lounge, gym, super business, large conference hall, and the like. Of course, the transmit power configuration system may also be applied to other WLAN scenarios, which are not limited in this embodiment of the present application.

Fig. 2 is a flow chart of a method for configuring transmission power according to an embodiment of the present application. The method can be applied to a transmission power configuration system as shown in fig. 1. As shown in fig. 2, the method includes:

step 201, the control device acquires radio frequency environment information of the AP.

The radio frequency environment information includes a distance between an AP and STAs to which the AP is connected.

Alternatively, after acquiring the location information of the STA, the AP may calculate a distance between the AP and the STA according to the location information of the AP and the location information of the STA, and transmit the calculated distance to the control device. Or, after the AP acquires the location information of the STA, the AP may send the location information of the AP and the location information of the STA to the control device, and the control device calculates the distance between the AP and the STA according to the location information of the AP and the location information of the STA. Since the location of the AP in the WLAN is generally fixed, the AP may also transmit only the location information of the STA to the control device when the location information of the AP is stored in the control device.

In the embodiment of the application, the AP can periodically acquire the position information of each STA connected with the AP, so that the control equipment can periodically update the distance between the AP and the STA in the radio frequency environment information of the AP, and the real-time performance and the reliability of the radio frequency environment information are ensured. Or, the AP may monitor the positions of the STAs connected to the AP in real time, and when the position of a certain STA changes or a new STA accesses the AP, the AP transmits the position information of the STA whose position changes and/or the position information of the newly accessed STA to the control device, without transmitting the position information of all STAs to the control device, thereby saving transmission resources and reducing network overhead.

Optionally, the radio frequency environment information further includes one or more of a channel frequency between the AP and the STA, an amount of shielding attenuation corresponding to the AP, and a channel bandwidth between the AP and the STA.

The channel frequency between the AP and the STA refers to the center frequency of the channel between the AP and the STA. The channel between the AP and the STA is generally determined by the control device, and thus channel information such as the channel frequency between the AP and the STA and the channel bandwidth between the AP and the STA may be stored in the control device.

The shielding attenuation amount corresponding to an AP refers to the signal attenuation amount caused by the influence of a shielding object in the environment when an STA located in the signal coverage area of the AP communicates with the AP. The shielding attenuation corresponding to the AP is determined by the environment in which the AP is located. Alternatively, the control device may store in advance the amount of shielding attenuation corresponding to each AP managed by the control device. For example, when networking, the shielding attenuation amount corresponding to the AP can be determined according to the environment where the AP is located, and the shielding attenuation amount corresponding to the AP is stored in the control device.

Illustratively, after a signal having a frequency of 5.2 gigahertz (GHz) passes through a 5 centimeter (cm) thick glass baffle, the signal attenuation of the signal by the glass baffle is 7 decibels (dB). If a glass partition plate with a thickness of approximately 5cm exists between a personnel activity area within a signal coverage range of an AP and the AP, the shielding attenuation corresponding to the AP can be determined to be 7dB.

Step 202, the control device determines the target transmitting power of the STA according to the radio frequency environment information.

Wherein the target transmit power is positively correlated with the distance between the AP and the STA. The control device determines the target transmitting power of the STA according to different acquired radio frequency environment information contents. The present embodiment will be described by taking the following cases as examples.

First case: the radio frequency environment information includes a distance between the AP and the STA to which the AP is connected, and a channel frequency between the AP and the STA. The process of determining the target transmit power of the STA by the control device according to the radio frequency environment information may include:

the control device first determines a Path Loss (PL) amount between the AP and the STA according to a distance between the AP and the STA and a channel frequency between the AP and the STA. The control device then determines a target transmit power based on the amount of path loss between the AP and the STA.

Optionally, an IEEE 802.11channel (channel) D fading model may be configured on the control device, and the control device inputs the acquired distance between the AP and the STA and the channel frequency between the AP and the STA into the IEEE 802.11channel D fading model, and acquires the path loss amount between the AP and the STA output by the IEEE 802.11channel D fading model.

Second case: the radio frequency environment information comprises the distance between the AP and the STA connected with the AP, the channel frequency between the AP and the STA and the shielding attenuation corresponding to the AP. The process of determining the target transmit power of the STA by the control device according to the radio frequency environment information may include:

the control device first determines the amount of path loss between the AP and the STA based on the distance between the AP and the STA and the channel frequency between the AP and the STA. And then the control equipment determines the target transmitting power according to the path loss quantity between the AP and the STA and the shielding attenuation quantity corresponding to the AP.

It is to be understood that the sum of the path loss amount and the shielding attenuation amount is the total loss amount. In the embodiment of the application, in the process of determining the target transmitting power according to the path loss amount between the AP and the STA and the shielding attenuation amount corresponding to the AP, the control device refers to two transmission loss factors, namely the path loss amount and the shielding attenuation amount, so that the accuracy of determining the target transmitting power can be improved.

Third case: the radio frequency environment information includes a distance between the AP and an STA to which the AP is connected, a channel frequency between the AP and the STA, an amount of shielding attenuation corresponding to the AP, and a channel bandwidth between the AP and the STA. The process of determining the target transmit power of the STA by the control device according to the radio frequency environment information may include:

The control device firstly determines the path loss amount between the AP and the STA according to the distance between the AP and the STA and the channel frequency between the AP and the STA, and then calculates the target transmitting power by adopting a target formula (also called a link budget formula), wherein the target formula is as follows:

P _STA ＝RSSI-G _STA +PL+SF-G _AP 。

wherein P is _STA The target transmit power is in decibel milliwatts (dBm). RSSI is a target received signal strength indicator value of the AP, and is expressed in dBm. G _STA The antenna gain of the STA is in dBi (dBi is the unit of power gain). PL is the amount of path loss between the AP and STA in dB. SF is the shielding attenuation corresponding to AP, and the unit is dB. G _AP The antenna gain for an AP is in dBi.

Optionally, the antenna gain of the AP (G _AP ) May be sent by the AP to the control device. Antenna gain of STA (G _STA ) The STA may transmit the antenna gain to the control device through the AP, or the control device may default the antenna gain of the STA to 0. The target received signal strength indicator (received signal strength indication, RSSI) of the AP may be converted from a received signal-to-noise ratio (SNR) of the AP. In this embodiment of the present application, a target receiving signal-to-noise ratio of the AP may be preset, where the target receiving signal-to-noise ratio may be an expected value or a protocol index value set by a person. The control device determines a target received signal strength indication value of the AP according to the channel bandwidth between the AP and the STA and the target received signal noise ratio of the AP.

Optionally, the process of determining the target received signal strength indication value of the AP by the control device according to the channel bandwidth between the AP and the STA and the target received signal to noise ratio of the AP may include:

the control device calculates a thermal noise power level (also known as background noise) using a first formula and then calculates a target received signal strength indicator using a second formula. The first formula is:

P _TN ＝-174+10×lg(BW)+NF。

wherein P is _TN Is the thermal noise power level in dBm. BW is the channel bandwidth between the AP and STA in hertz (Hz). NF is APThe noise figure of the receiver is in dB. Alternatively, NF may take on a value of 6dB.

The second formula is:

RSSI＝SNR+P _TN 。

the RSSI is a target received signal strength indication value of the AP, and the SNR is a target received signal-to-noise ratio.

In the third case, in the process of determining the target transmitting power, the control device considers not only the actual communication environment of the AP and the STA but also the received signal-to-noise ratio of the AP, so that when the STA uses the target transmitting power determined by the control device to transmit data, the communication quality between the STA and the AP can be ensured.

By way of example, the embodiment of the present application exemplifies the implementation procedure of the control device to determine the target transmit power of the STA, taking the third case described above as an example. Assuming that the distance between the AP and the STA is 98.2 meters (m), the channel center frequency between the AP and the STA is 5.2GHz, the shielding attenuation corresponding to the AP is 7dB, and the channel bandwidth between the AP and the STA is 20MHz. And assuming a target received signal-to-noise ratio of 10.5db for the AP, an antenna gain of 1dBi for the sta and 3dBi for the AP. The process of the control device determining the target transmitting power of the STA according to the radio frequency environment information is as follows:

The control device inputs the distance between the AP and the STA of 98.2m and the channel frequency between the AP and the STA of 5.2GHz to the IEEE 802.11channel D fading model, and the output result of the IEEE 802.11channel D fading model is 101.5dB, namely the path loss between the AP and the STA is 101.5dB.

The control device calculates the thermal noise power level P by using the first formula _TN The method comprises the following steps:

P _TN ＝-174+10×lg(20×10 ⁶ )+6＝-95dB。

the control device calculates a target received signal strength indication value RSSI using the second formula as follows:

RSSI＝10.5+(-95)＝-84.5dB。

the control device calculates the target transmitting power P by adopting a target formula _STA The method comprises the following steps:

P _STA ＝-84.5-1+101.5+7-3＝20dBm。

step 203, the control device generates a target packet, where the target packet includes a target transmit power.

Optionally, the target message includes an indication field and a data field, the data field includes a target transmit power, the indication field includes an identifier of the STA, and the indication field is used for indicating the AP to send the target transmit power to the STA. Since the control device may also transmit the target transmit power of the AP to the AP, the AP transmits data according to the target transmit power. Thereby realizing the transmission power control (transmit power control, TPC) of the WLAN by regulating the transmission power of the AP. In the embodiment of the application, the indication field is set in the target message, and the indication field indicates the configuration object of the transmitting power in the data field, so that the transmitting power of the STA is prevented from being configured to the AP by the AP, and the configuration error of the transmitting power is avoided. Illustratively, when the indication field value is 1, the configuration object representing the transmission power in the data field is an AP; when the indication field value is 0, the configuration object indicating the transmission power in the data field is STA.

In this embodiment of the present application, besides setting the indication field in the target packet, the configuration object of the transmitting power included in the target packet may be differentiated by other manners as to whether the configuration object is an AP or an STA, which is not limited in this embodiment of the present application.

Step 204, the control device sends a target message to the AP.

Step 205, the AP parses the target packet to obtain the target transmit power.

Optionally, the target message includes an indication field and a data field. Referring to the example in step 203, when the indication field value is 1, the AP configures its own transmit power to the target transmit power carried in the data field. When the indication field value is 0, the AP determines that the target transmit power carried in the data field is the transmit power of the STA, and performs step 206 described below.

In step 206, the AP sends the target transmit power to the STA in a unicast manner.

Optionally, the implementation process that the AP sends the target transmit power to the STA in a unicast manner may refer to the following steps a and B:

in step a, the AP determines a local capability constraint (local power constraint) field value in a capability constraint (power constraint) cell based on the target transmit power.

Fig. 3 is a schematic diagram of a format of a capability constraint cell according to an embodiment of the present application. As shown in fig. 3, the capability constraint cell includes an element identification (element ID) field, a length field, and a local capability constraint field. Wherein, the maximum length of the element identification field, the length field and the local capability constraint field is 1 byte. The element identification field is used for carrying the identification of the capability constraint cell, the length field is used for carrying the length of the local capability constraint field, and the local capability constraint field is used for carrying the target transmission power. In the IEEE 802.11 series of standards, the local capability constraint field is encoded as an unsigned integer in dB, which is equal to the difference between the regulatory limit value specified by the national cell and the target transmit power.

In step B, the AP transmits a management frame including the capability constraint cell to the STA.

Optionally, the AP sends the management frame to the STA in a unicast manner. The management frame may be, for example, a beacon (beacon) frame defined in the IEEE 802.11 series of standards.

In step 207, the STA uses the target transmit power to transmit data to the AP.

Optionally, after receiving the target transmission power sent by the AP, the STA may directly send data to the AP by using the target transmission power, or may select the transmission power with the smallest value among all the available transmission powers of the STA to send data. Optionally, the STA is provided with a fixed transmit power. For example, the fixed transmit power may be a regulatory limit value specified by a national cell. When the fixed transmission power of the STA is greater than the target transmission power, the STA transmits data to the AP using the target transmission power. And when the fixed transmission power of the STA is smaller than the target transmission power, the STA adopts the fixed transmission power to transmit data to the AP.

Because the STA uses a smaller value of transmit power to transmit data, the interference range of the signal can be smaller, and the interference degree to other STAs is smaller.

In summary, according to the method for configuring the transmitting power provided in the embodiments of the present application, the control device determines the target transmitting power of the STA connected to the AP according to the radio frequency environment information of the AP, and because the radio frequency environment information of the AP includes the distance between the AP and the STA connected to the AP, the control device determines the target transmitting power of the STA according to the direct correlation between the target transmitting power of the STA and the distance between the AP and the STA, that is, the control device determines the target transmitting power of the STA according to the actual communication environment of the AP and the STA. Therefore, the phenomenon that the signal interference range is large and the interference degree to other STAs is large due to the fact that the STA adopts excessive transmitting power can be avoided as much as possible while effective communication between the STA and the AP is ensured. The reliability of communication between the STA and the AP is improved.

Further, the radio frequency environment information of the AP may further include one or more of a channel frequency between the AP and the STA, an amount of shielding attenuation corresponding to the AP, and a channel bandwidth between the AP and the STA. The control device determines the path loss amount between the AP and the STA according to the distance between the AP and the STA and the channel frequency between the AP and the STA in the radio frequency environment information of the AP, and then calculates the target transmitting power by adopting a target formula, wherein the independent variable in the target formula comprises the target receiving signal-to-noise ratio of the AP. That is, in the process of determining the target transmitting power, the control device considers not only the actual communication environment of the AP and the STA, but also the receiving signal-to-noise ratio of the AP, so that when the STA adopts the target transmitting power determined by the control device to transmit data, the communication quality between the STA and the AP can be ensured.

Fig. 4 is a schematic structural diagram of a transmission power configuration device provided in an embodiment of the present application, where the transmission power configuration device is used for controlling a device. As shown in fig. 4, the transmission power configuration apparatus 400 includes:

the acquiring module 401 is configured to acquire radio frequency environment information of an access point AP in a wireless local area network WLAN, where the radio frequency environment information includes a distance between the AP and a station STA in the WLAN to which the AP is connected.

The first determining module 402 is configured to determine, according to the radio frequency environment information, a target transmit power of the STA, where the target transmit power is positively related to a distance between the AP and the STA.

A sending module 403, configured to send a target packet to the AP, where the target packet carries a target transmitting power.

Optionally, the radio frequency environment information further includes a channel frequency between the AP and the STA, and the first determining module 402 is further configured to: the amount of path loss between the AP and the STA is determined based on the distance between the AP and the STA and the channel frequency between the AP and the STA. And determining the target transmitting power according to the path loss quantity between the AP and the STA.

Optionally, the radio frequency environment information further includes an occlusion attenuation amount corresponding to the AP, and the first determining module 402 is further configured to: and determining the target transmitting power according to the path loss between the AP and the STA and the shielding attenuation corresponding to the AP.

Optionally, the radio frequency environment information further includes a channel bandwidth between the AP and the STA. As shown in fig. 5, the transmission power configuration apparatus 400 further includes:

a second determining module 404, configured to determine a target received signal strength indication value of the AP according to a channel bandwidth between the AP and the STA and a target received signal-to-noise ratio of the AP.

The first determining module 402 is further configured to: calculating a target transmitting power by adopting a target formula, wherein the target formula is as follows:

P _STA ＝RSSI-G _STA +PL+SF-G _AP ；

Wherein P is _STA For target transmitting power, RSSI is a target received signal strength indication value of AP, G _STA For the antenna gain of the STA, PL is the path loss between the AP and the STA, SF is the shielding attenuation corresponding to the AP, G _AP Is the antenna gain of the AP.

Optionally, as shown in fig. 6, the transmit power configuration apparatus 400 further includes:

the generating module 405 is configured to generate a target packet, where the target packet includes an indication field and a data field, the data field includes a target transmit power, the indication field includes an identifier of the STA, and the indication field is configured to instruct the AP to send the target transmit power to the STA.

In summary, in the transmit power configuration device provided in the embodiment of the present application, the first determining module determines, according to the radio frequency environment information of the AP, the target transmit power of the STA connected to the AP, and since the radio frequency environment information of the AP includes the distance between the AP and the STA connected to the AP, the target transmit power of the STA determined by the first determining module is positively correlated with the distance between the AP and the STA, that is, the first determining module determines the target transmit power of the STA according to the actual communication environment of the AP and the STA. Therefore, the phenomenon that the signal interference range is large and the interference degree to other STAs is large due to the fact that the STA adopts excessive transmitting power can be avoided as much as possible while effective communication between the STA and the AP is ensured. The reliability of communication between the STA and the AP is improved.

Fig. 7 is a schematic structural diagram of a transmit power configuration device according to another embodiment of the present application, where the transmit power configuration device is used for an AP in a WLAN. As shown in fig. 7, the transmission power configuration apparatus 700 includes:

the receiving module 701 is configured to receive a target packet sent by the control device, where the target packet includes a target transmit power of a station STA in the WLAN connected by the AP.

The parsing module 702 is configured to parse the target packet to obtain a target transmit power.

A sending module 703, configured to send the target transmit power to the STA in a unicast manner.

Optionally, the sending module 703 is further configured to: determining a local capability constraint field value in the capability constraint cell according to the target transmitting power, wherein the local capability constraint field value is equal to the difference value between the rule limit value specified by the national cell and the target transmitting power; a management frame including the capability constraint cell is transmitted to the STA.

In summary, in the transmit power configuration device provided in the embodiment of the present application, the receiving module may receive the target transmit power of the STA connected to the AP according to the radio frequency environment information of the AP, and the transmitting module may transmit the target transmit power to the STA. Because the radio frequency environment information of the AP includes the distance between the AP and the STA to which the AP is connected, and the target transmitting power of the STA determined by the control device is positively related to the distance between the AP and the STA, that is, the control device determines the target transmitting power of the STA according to the actual communication environment of the AP and the STA. Therefore, the phenomenon that the signal interference range is large and the interference degree to other STAs is large due to the fact that the STA adopts excessive transmitting power can be avoided as much as possible while effective communication between the STA and the AP is ensured. The reliability of communication between the STA and the AP is improved.

Fig. 8 is a schematic structural diagram of a transmit power configuration apparatus according to still another embodiment of the present application, where the transmit power configuration apparatus is used for STAs in a WLAN. As shown in fig. 8, the transmission power configuration apparatus 800 includes:

a receiving module 801, configured to receive a target transmit power sent by an access point AP in a WLAN connected to the STA.

A transmitting module 802, configured to transmit data to the AP using the target transmit power.

Optionally, the sending module 802 is further configured to: and when the fixed transmission power of the STA is larger than the target transmission power, transmitting data to the AP by adopting the target transmission power.

In summary, in the transmitting power configuration device provided in the embodiment of the present application, the receiving module receives the target transmitting power sent by the AP in the WLAN connected to the STA, and the sending module sends data to the AP by using the target transmitting power. The target transmitting power is determined by the control device according to the radio frequency environment information of the AP, and the radio frequency environment information of the AP comprises the distance between the AP and the STA connected with the AP, and the target transmitting power of the STA determined by the control device is positively related to the distance between the AP and the STA, namely the control device determines the target transmitting power of the STA according to the actual communication environment of the AP and the STA. Therefore, the phenomenon that the signal interference range is large and the interference degree to other STAs is large due to the fact that the STA adopts excessive transmitting power can be avoided as much as possible while effective communication between the STA and the AP is ensured. The reliability of communication between the STA and the AP is improved.

The specific manner in which the various modules perform the operations in the apparatus of the above embodiments have been described in detail in connection with the embodiments of the method, and will not be described in detail herein.

Fig. 9 is a block diagram of a transmit power configuration apparatus provided in an embodiment of the present application. The transmit power configuration means may be a control device, an AP or a STA in the WLAN. As shown in fig. 9, the transmission power configuration apparatus 900 includes: a processor 901 and a memory 902.

A memory 902 for storing a computer program comprising program instructions.

A processor 901 for invoking a computer program to implement the steps performed by the control device as described in the above method embodiments; or, the steps executed by the AP according to the above method embodiment; or, the steps performed by the STA related to the above method embodiment.

Specifically, in the case that the transmission power configuration apparatus 900 is a control device, the processor 901 is configured to obtain radio frequency environment information of an AP in the WLAN, where the radio frequency environment information includes a distance between the AP and an STA connected to the AP. And determining target transmitting power of the STA according to the radio frequency environment information, wherein the target transmitting power is positively related to the distance between the AP and the STA. And the method is also used for sending a target message to the AP, wherein the target message carries target transmitting power. For the specific implementation process, please refer to the detailed descriptions of steps 201 to 204 in the embodiment shown in fig. 2, which are not repeated here.

Further, in the case where the respective modules in fig. 4 to 6 described above are implemented in software, the respective program modules described above may be stored in the memory 902, and the processor 901 executes the respective software modules in the memory 902 to perform the processing steps and functions of the control device as related to the above-described method embodiments.

In the case that the transmit power configuration apparatus 900 is an AP, the processor 901 is configured to receive a target packet sent by the control device, where the target packet includes a target transmit power of an STA connected to the AP. And analyzing the target message to obtain target transmitting power. And is also used to send the target transmit power to the STA in a unicast manner. For the specific implementation process, please refer to the detailed descriptions of the steps 205 to 206 in the embodiment shown in fig. 2, which are not repeated here.

Further, in the case where the respective modules in fig. 7 described above are implemented in software, the respective program modules described above may be stored in the memory 902, and the processor 901 executes the respective software modules in the memory 902 to perform the processing steps and functions of the AP as related to the above-described method embodiments.

In the case that the transmission power configuration apparatus 900 is an STA, the processor 901 is configured to receive a target transmission power sent by an AP to which the STA is connected, and send data to the AP using the target transmission power. For a specific implementation process, please refer to the detailed description of step 207 in the embodiment shown in fig. 2, which is not repeated here.

Further, in the case where the respective modules in fig. 8 described above are implemented in software, the respective program modules described above may be stored in the memory 902, and the processor 901 executes the respective software modules in the memory 902 to perform the processing steps and functions of the STA according to the above-described method embodiments.

Optionally, the transmit power configuration device 900 further comprises a communication bus 903 and a communication interface 904.

Wherein the processor 901 comprises one or more processing cores, the processor 901 performs various functional applications and data processing by running computer programs.

The memory 902 may be used to store computer programs. Optionally, the memory may store an operating system and at least one application unit required for functionality. The operating system may be a real-time operating system (Real Time eXecutive, RTX), LINUX, UNIX, WINDOWS, or an operating system such as OS X.

The communication interface 904 may be multiple, with the communication interface 904 being used to communicate with other storage devices or network devices. The memory 902 and the communication interface 904 are connected to the processor 901 via a communication bus 903, respectively.

The embodiment of the application also provides a computer storage medium, which stores instructions that, when executed by a processor of a control device, implement the steps executed by the control device as described in the above method embodiments; or, when the instructions are executed by the processor of the AP, implementing the steps performed by the AP as referred to in the method embodiments above; alternatively, the steps performed by the STA as referred to in the method embodiments described above are implemented when the instructions are executed by a processor of the STA.

It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program for instructing relevant hardware, where the program may be stored in a computer readable storage medium, and the storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.

In the present embodiments, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The term "and/or" in this application is merely an association relation describing an associated object, and indicates that three relations may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

The foregoing description of the preferred embodiments is merely exemplary in nature and is in no way intended to limit the invention, its application, to the form and details of construction and the arrangement of the preferred embodiments, and thus, any and all modifications, equivalents, and alternatives falling within the spirit and principles of the present application.

Claims

1. A method of transmit power configuration, the method comprising:

The control equipment acquires radio frequency environment information of an Access Point (AP) in a Wireless Local Area Network (WLAN), wherein the radio frequency environment information comprises the distance between the AP and a Station (STA) in the WLAN connected with the AP;

the control equipment determines target transmitting power of the STA according to the radio frequency environment information, wherein the target transmitting power is positively related to the distance between the AP and the STA;

the control device sends a target message to the AP, wherein the target message comprises an indication field and a data field, the data field comprises the target transmitting power, the indication field comprises the identification of the STA, and the indication field is used for indicating the AP to send the target transmitting power to the STA.

2. The method of claim 1, wherein the radio frequency environment information further comprises a channel frequency between the AP and the STA, and wherein the controlling device determining the target transmit power of the STA according to the radio frequency environment information comprises:

the control device determines the path loss amount between the AP and the STA according to the distance between the AP and the STA and the channel frequency between the AP and the STA;

The control device determines the target transmit power according to an amount of path loss between the AP and the STA.

3. The method of claim 2, wherein the radio frequency environment information further includes an amount of shielding attenuation corresponding to the AP, and wherein the controlling device determining the target transmit power according to an amount of path loss between the AP and the STA comprises:

and the control equipment determines the target transmitting power according to the path loss quantity between the AP and the STA and the shielding attenuation quantity corresponding to the AP.

4. The method of claim 3, wherein the radio frequency environment information further comprises a channel bandwidth between the AP and the STA, the method further comprising:

the control device determines a target received signal strength indication value of the AP according to the channel bandwidth between the AP and the STA and the target received signal to noise ratio of the AP;

the control device determines the target transmitting power according to the path loss amount between the AP and the STA and the shielding attenuation amount corresponding to the AP, including:

the control device calculates the target transmitting power by adopting a target formula, wherein the target formula is as follows:

P _STA ＝RSSI-G _STA +PL+SF-G _AP ；

Wherein P is _STA For the target transmit power, RSSI is the target reception of the APSignal strength indication value, G _STA For the antenna gain of the STA, PL is the path loss between the AP and the STA, SF is the shielding attenuation corresponding to the AP, G _AP Is the antenna gain of the AP.

5. The method according to any one of claims 1 to 4, wherein before the control device sends the target message to the AP, the method further comprises:

and the control equipment generates the target message.

6. A method of transmit power configuration, the method comprising:

an Access Point (AP) in a Wireless Local Area Network (WLAN) receives a target message sent by control equipment, wherein the target message comprises an indication field and a data field, the data field comprises target transmitting power of a Station (STA) in the WLAN connected with the AP, the indication field comprises an identification of the STA, and the indication field is used for indicating the AP to send the target transmitting power to the STA;

the AP analyzes the target message to obtain the target transmitting power;

and the AP sends the target transmitting power to the STA in a unicast mode.

7. The method of claim 6, wherein the AP transmitting the target transmit power to the STA in a unicast manner comprises:

the AP determines a local capacity constraint field value in a capacity constraint cell according to the target transmitting power, wherein the local capacity constraint field value is equal to a difference value between a rule limit value designated by a national cell and the target transmitting power;

the AP transmits a management frame including the capability constraint cell to the STA.

8. A method of transmit power configuration, the method comprising:

a Station (STA) in a Wireless Local Area Network (WLAN) receives target transmitting power sent by an Access Point (AP) in the WLAN connected with the STA in a unicast mode, wherein the target transmitting power is determined by control equipment according to radio frequency environment information of the AP, the radio frequency environment information comprises the distance between the AP and the STA, and the target transmitting power is positively correlated with the distance between the AP and the STA;

and the STA transmits data to the AP by adopting the target transmitting power.

9. The method of claim 8, wherein the STA transmitting data to the AP using the target transmit power comprises:

And when the fixed transmitting power of the STA is larger than the target transmitting power, the STA adopts the target transmitting power to transmit data to the AP.

10. A transmit power configuration apparatus for controlling a device, the transmit power configuration apparatus comprising:

an acquisition module, configured to acquire radio frequency environment information of an access point AP in a wireless local area network WLAN, where the radio frequency environment information includes a distance between the AP and a station STA in the WLAN to which the AP is connected;

the first determining module is used for determining target transmitting power of the STA according to the radio frequency environment information, wherein the target transmitting power is positively related to the distance between the AP and the STA;

the transmitting module is configured to transmit a target packet to the AP, where the target packet includes an indication field and a data field, the data field includes the target transmit power, the indication field includes an identifier of the STA, and the indication field is configured to indicate the AP to transmit the target transmit power to the STA.

11. The apparatus of claim 10, wherein the radio frequency environment information further comprises a channel frequency between the AP and the STA, the first determining module further configured to:

Determining the path loss amount between the AP and the STA according to the distance between the AP and the STA and the channel frequency between the AP and the STA;

and determining the target transmitting power according to the path loss quantity between the AP and the STA.

12. The apparatus of claim 11, wherein the radio frequency environment information further comprises an amount of shielding attenuation corresponding to the AP, and wherein the first determining module is further configured to:

and determining the target transmitting power according to the path loss quantity between the AP and the STA and the shielding attenuation quantity corresponding to the AP.

13. The apparatus of claim 12, wherein the radio frequency environment information further comprises a channel bandwidth between the AP and the STA, the transmit power configuration apparatus further comprising:

a second determining module, configured to determine a target received signal strength indication value of the AP according to a channel bandwidth between the AP and the STA and a target received signal to noise ratio of the AP;

the first determining module is further configured to:

calculating the target transmitting power by adopting a target formula, wherein the target formula is as follows:

P _STA ＝RSSI-G _STA +PL+SF-G _AP ；

wherein P is _STA For the target transmitting power, RSSI is the target received signal strength indication value of the AP, G _STA For the antenna gain of the STA, PL is the path loss between the AP and the STA, SF is the shielding attenuation corresponding to the AP, G _AP Is the antenna gain of the AP.

14. The apparatus according to any one of claims 10 to 13, wherein the transmit power configuration means further comprises:

and the generating module is used for generating the target message.

15. A transmit power configuration apparatus for an access point AP in a wireless local area network WLAN, the transmit power configuration apparatus comprising:

a receiving module, configured to receive a target packet sent by a control device, where the target packet includes an indication field and a data field, the data field includes a target transmit power of a station STA in the WLAN connected by the AP, the indication field includes an identifier of the STA, and the indication field is used to instruct the AP to send the target transmit power to the STA;

the analysis module is used for analyzing the target message to obtain the target transmitting power;

and the sending module is used for sending the target transmitting power to the STA in a unicast mode.

16. The apparatus of claim 15, wherein the transmitting module is further configured to:

Determining a local capability constraint field value in a capability constraint cell according to the target transmitting power, wherein the local capability constraint field value is equal to a difference value between a rule limit value designated by a national cell and the target transmitting power;

and transmitting a management frame including the capability constraint cell to the STA.

17. A transmit power configuration apparatus for a station STA in a wireless local area network WLAN, the transmit power configuration apparatus comprising:

the receiving module is used for receiving target transmitting power sent by an Access Point (AP) in the WLAN connected with the STA in a unicast mode, wherein the target transmitting power is determined by control equipment according to radio frequency environment information of the AP, the radio frequency environment information comprises the distance between the AP and the STA, and the target transmitting power is positively related to the distance between the AP and the STA;

and the sending module is used for sending data to the AP by adopting the target transmitting power.

18. The apparatus of claim 17, wherein the transmitting module is further configured to:

and when the fixed transmitting power of the STA is larger than the target transmitting power, transmitting data to the AP by adopting the target transmitting power.

19. A transmit power configuration system, characterized in that it comprises a control device, an access point AP in a wireless local area network WLAN, and a station STA in the WLAN, the control device comprising a transmit power configuration apparatus according to any of claims 10 to 14, the AP comprising a transmit power configuration apparatus according to claim 15 or 16, and the STA comprising a transmit power configuration apparatus according to claim 17 or 18.

20. A transmit power configuration apparatus for controlling a device, comprising: a processor and a memory;

the memory is used for storing a computer program, and the computer program comprises program instructions;

the processor is configured to invoke the computer program to implement the method for configuring transmission power according to any of claims 1 to 5.

21. A transmit power configuration apparatus for an access point AP in a wireless local area network WLAN, comprising: a processor and a memory;

the processor is configured to invoke the computer program to implement the transmit power configuration method according to claim 6 or 7.

22. A transmit power configuration apparatus for a station STA in a wireless local area network WLAN, comprising: a processor and a memory;

the processor is configured to invoke the computer program to implement the transmit power configuration method according to claim 8 or 9.

23. A computer storage medium having instructions stored thereon which, when executed by a processor of a control device, implement the transmit power configuration method of any of claims 1 to 5; alternatively, the instructions, when executed by a processor of an access point AP in a wireless local area network WLAN, implement the transmit power configuration method according to claim 6 or 7; alternatively, the transmit power configuration method according to claim 8 or 9 is implemented when the instructions are executed by a processor of a station STA in the WLAN.