WO2015024194A1

WO2015024194A1 - Radio frequency optimization method and related device

Info

Publication number: WO2015024194A1
Application number: PCT/CN2013/081869
Authority: WO
Inventors: 庄宏成; 黄帆
Original assignee: 华为技术有限公司
Priority date: 2013-08-20
Filing date: 2013-08-20
Publication date: 2015-02-26

Abstract

A radio frequency optimization method and a related device. In the optimization method, whether or not an AP needs to be added is determined according to user equipment information reported by a first AP; the position of the newly added AP is determined when the AP needs to be added; then access point correlation is performed again on UE initially correlated to the first AP; beamforming is generated for a second AP and the first AP respectively and then load estimate is performed on the second AP and the first AP respectively; afterwards, a KPI (Key Performance Indicator) is computed on the basis of the estimated loads of the second AP and the first AP; and finally, whether or not the KPI is larger than a preset key performance indicator threshold is judged, and beamforming parameters are sent to the second AP and the first AP respectively in the case that the KPI is larger than the key performance indicator threshold.

Description

Radio frequency optimization method and related device

Technical field

The embodiments of the present invention relate to the field of communications, and in particular, to a radio frequency optimization method and related device. Background technique

Compared with the macro cellular network, in the WLAN (Wireless Local Area Network) network, because the coverage of the access point (AP) is relatively small, the service application of the users in the small area is more dynamic. At the same time, the number of users of a single AP service is limited, which can easily lead to AP saturation.

The service hotspot refers to a large number of users gathered in a small area. Compared with other areas, the service distribution density is large, which may lead to unbalanced load, network capacity and coverage performance degradation. Business hotspots are becoming more and more frequent, and RF (Radio Frequency) optimization needs to be performed on the basis of the original network planning.

The existing radio frequency optimization method usually adjusts the parameters of the antenna, including the antenna power, the downtilt angle, and the direction angle, thereby causing a change in the coverage of the cell.

However, in the process of implementing the present invention, the inventors of the present invention have found that the existing radio frequency optimization method has limited adjustment capability and poor flexibility, and the antenna radiation characteristics (gain or sensitivity) cannot be adjusted in different directions, and it is difficult to adapt to coverage in various directions. Distance demand, anisotropic channel conditions. Summary of the invention

Embodiments of the present invention provide a radio frequency optimization method and related apparatus, which are applicable to coverage distance requirements and anisotropic channel conditions in different directions.

In a first aspect, an embodiment of the present invention provides a method for optimizing a radio frequency, including:

Receiving the user equipment information reported by the first wireless access point AP, where the user equipment information includes: the service requirement information, the location information, and the idle channel detection CCA information of the user equipment UE that is initially associated with the first AP periodic statistics. The first AP is controlled by the wireless controller AC; determining, according to the user equipment information reported by the first AP, whether the AP needs to be added and the location of the AP is increased; If the AP needs to be added and the added AP is the second AP, re-establish the wireless access point association with the UE initially associated with the first AP.

Generating a beamforming for the second AP and the first AP, respectively, based on the UE that re-establishes the association of the wireless access point;

According to the signal to noise ratio and the service requirement of the UE after re-establishing the association of the wireless access point, the second

The AP performs load estimation, and performs load estimation on the first AP.

Calculating a key performance indicator KPI according to the estimated load of the second AP and the load of the first AP;

Determining whether the KPI is greater than a preset key performance indicator threshold;

If the KPI is less than the key performance indicator threshold, respectively, to the second AP and the first

The AP sends a beamforming parameter.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the re-establishing a wireless access point association for the UE that is initially associated with the first AP includes:

Calculating, respectively, a path loss value of the UE that is initially associated to the first AP to the second AP; determining whether a path loss value of each UE to the second AP is greater than a path loss threshold; a UE that describes a path loss threshold, and associates it to the second AP; for a UE whose path loss value is greater than or equal to the path loss threshold, associates it with the first

AP.

With reference to the first aspect, or the first possible implementation manner of the first aspect, in the second possible implementation manner of the first aspect, the UE that is based on re-establishing the wireless access point association is respectively The second AP and the first AP generate beamforming, including:

Generating a beamforming for the second AP based on the UE associated with the second AP after re-establishing the wireless access point association;

Calculating a total transmit power of the antenna of the second AP according to a beamforming generated by the second AP;

Determining whether the total transmit power of the antenna of the second AP meets a power limitation condition;

If the total transmit power of the antenna of the second AP does not meet the power limitation condition, re-establish the wireless access point association with the UE initially associated with the first AP;

If the total antenna transmit power of the second AP meets the power limitation condition, the UE is associated with the first AP after re-establishing the wireless access point association, and generating a beamforming for the first AP; Calculating a total antenna transmit power of the first AP according to a beamforming generated by the first AP;

Determining whether the total antenna transmit power of the first AP meets a power limitation condition;

If the total transmit power of the antenna of the first AP does not meet the power limitation condition, the UE initially associated with the first AP is re-established with the wireless access point association.

With reference to the second possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect, the determining, by the beam shaping generated by the second AP, the antenna of the second AP Total transmit power, including:

Determining, according to location information of the UE initially associated with the first AP, a desired direction of the second AP;

Calculating a sample value of the desired pattern of the second AP in each sampling direction;

Calculating the second according to the sampled values in the respective sampling directions according to the desired pattern of the second AP

The antenna element weighting coefficient of the AP;

Calculating a total antenna transmit power of the second AP according to the antenna element weighting coefficient.

With reference to the third possible implementation manner of the first aspect, in a fourth possible implementation manner of the first aspect, the calculating, by using the sampled value of the desired pattern of the second AP in each sampling direction, includes:

Obtaining + 1) sampling directions in a desired pattern of the second AP according to the number of transmitting antennas of the second AP, where the number of transmitting antennas is ^;

The angle of each sampling direction relative to the main direction is calculated as follows:

,

Wherein, the angle is the angle of the nth sampling direction with respect to the main direction, the n = -K / 2, . . . , K / 2, the wavelength is, the number of transmitting antennas, the antenna Array spacing

Obtaining a coverage range of each sector divided by each sampling direction in the desired direction image; acquiring sampling values in the respective sampling directions according to the coverage of each sector; Calculating the weighting coefficients of the antenna elements of the second frame by using the sampled values in the respective sampling directions of the desired pattern, including:

The antenna element weighting coefficients of the second chirp are calculated as follows: κ/ ₂兀n=- ^K A

Wherein, the parameter is a weighting coefficient of the ίth antenna element of the second AP, where the position of the ίth array element relative to the midpoint of all the array elements of the second ,, the ^1^ , the t = l, 2, ..., , the _β „ is the sample value in the “sampling direction, the number of transmitting antennas, and the “sampling direction” relative to the main The angle of the direction, the wavelength is;

Calculating, according to the antenna element weighting coefficient, a total antenna power of the second AP, including:

Calculating the total antenna transmit power of the second AP by:

W, l, wherein the / is the weight coefficient of the γth antenna element of the second AP, and the number is the number of transmitting antennas.

With reference to the first aspect, in a fifth possible implementation manner of the first aspect, the performing load estimation on the second UI according to a signal-to-noise ratio and a service requirement of the UE after re-establishing the association of the wireless access point, Includes:

The rate obtainable by the UE associated with the second UE after re-establishing the wireless access point association is calculated as follows:

Ri = D _c ^{sch BW} W log ₂ (1 + ^ ^INR SINRi ) '

The rate is the rate that is available to the ith UE, the D is the scheduler coefficient of the second AP, the 7 ^SW is the channel bandwidth coefficient of the second AP, and the W is the The channel bandwidth of the second AP, wherein the signal is a signal-to-noise ratio (SNR), and the signal-to-noise ratio of the first UE is calculated by: calculating, after the re-establishing the association of the wireless access point, the association to the second AP. The length of transmission required by the UE:

The 7 is the transmission duration required by the ith UE, where is the rate requirement in the service requirement of the ith UE, the ⁄4 is the rate achievable by the first UE, and the uv is the The neighboring cell set of the cell C included in the second AP, the equal to 0 or 1, when 6^ = 0, the load brought by the interference domain increases, and when ^=1 is the load brought by the transmission domain, the ^ Equal to 0 or 1, when When the working channel of the second AP and the AP are different, c = 0. When the working channel of the second AP and the AP is the same, _^ = 1 , the AP is the AP to which the neighboring cell of the second AP belongs. T _d ' = ∑ is the transmission duration required by the UE associated with the APd;

Calculating the total transmission duration required by all UEs associated with the second AP after re-establishing the wireless access point association is as follows:

T _c = ∑ -r- + ∑ min ∑ _i ,\

R Ί where, the second AP, the A is a rate requirement in a service requirement of the first UE, and the time is a rate obtainable by the first UE;

Calculating the total transmission duration r _toto , _{e of} the second AP available by:

T _c ' where (^ is the nominal rate of the second AP, the; ^ is the media intervening factor of the second AP, the R _flV ^ is the average of the second AP Obtaining a rate, the number of users associated with the second AP;

The load estimation of the second AP is performed as follows:

, 7;

Pc

Total ,c

The load is the load of the second AP, the 7 is the total transmission duration required by all UEs of the second AP, and the _rtoto ^ is the total transmission duration available to the second AP.

With reference to the first aspect or the fifth possible implementation manner of the first aspect, in a sixth possible implementation manner of the first aspect, the KPI includes a load balancing coefficient, and the estimated second AP The load and the load of the first AP calculate a key performance indicator KPI, including:

Calculate the load balancing factor:

,

Wherein, the load balancing coefficient, the ^ is the load of the second ΑΡ or the first ,, and the |AP| refers to the total number of APs managed by the AC control.

With reference to the first aspect, or the first, second, third, fourth, and fifth possible implementation manners of the first aspect, in a seventh possible implementation manner of the first aspect, the method Also includes: And if the KPI is greater than or equal to the key performance indicator threshold, re-establishing a wireless access point association for the UE initially associated with the first AP.

In a second aspect, an embodiment of the present invention provides a radio frequency optimization apparatus, including: a receiving module, configured to receive user equipment information reported by a first radio access point AP, where the user equipment information includes: the first AP Periodically counting service requirement information, location information, and idle channel detection CCA information of the initially associated user equipment UE, where the first AP is controlled by the wireless controller AC;

An AP evaluation module, configured to determine, according to user equipment information reported by the first AP, whether to increase an AP and increase an AP location;

An association module, configured to re-establish a wireless access point association for the UE initially associated with the first AP, if the AP needs to be added and the added AP is the second AP;

a beamforming module, configured to generate a beamforming for the second AP and the first AP, respectively, based on re-establishing a UE that is associated with the wireless access point;

a load estimation module, configured to perform load estimation on the second AP, and perform load estimation on the first AP according to a signal-to-noise ratio and a service requirement of the UE that is re-established by the wireless access point;

a KPI calculation module, configured to calculate a key performance indicator KPI according to the estimated load of the second AP and the load of the first AP;

a KPI judging module, configured to determine whether the KPI is greater than a preset key performance indicator threshold, and a sending module, configured to: if the KPI is smaller than the key performance indicator threshold, to the second AP and the first AP respectively The beamforming parameters are sent.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the

a path loss calculation submodule, configured to separately calculate a path loss value of the UE initially associated with the first AP to the second AP;

a path loss determining sub-module, configured to determine, respectively, whether a path loss value of each UE to the second AP is greater than a path loss threshold;

a first association submodule, configured to associate a UE with a path loss value smaller than the path loss threshold to the second AP;

The second association submodule is configured to associate the UE with a path loss value greater than or equal to the path loss threshold to the first AP. With the second aspect or the first possible implementation of the second aspect, in a second possible implementation manner of the second aspect, the beam shaping module includes:

a second beamforming sub-module, configured to generate a beamforming for the second AP, based on a UE that is associated with the second AP after re-establishing a wireless access point association;

a power calculation submodule, configured to calculate a total antenna transmit power of the second AP according to a beamforming generated for the second AP;

a power judging sub-module, configured to determine whether a total transmit power of the antenna of the second AP meets a power limitation condition;

a triggering submodule, configured to execute the association module again if the total transmit power of the antenna of the second AP does not meet the power limitation condition;

a first beamforming sub-module, configured to: if the total antenna transmit power of the second AP meets a power limitation condition, based on re-establishing a wireless access point association, the UE associated with the first AP is the first The AP generates beamforming;

The power calculation sub-module is further configured to calculate a total antenna transmit power of the first AP according to a beamforming generated by the first AP;

The power judging sub-module is configured to determine whether a total transmit power of the antenna of the first AP meets a power limitation condition;

The triggering sub-module is further configured to perform the association module again if the total transmit power of the antenna of the first AP does not meet the power limitation condition.

With reference to the second possible implementation of the second aspect, in a third possible implementation manner of the second aspect, the power calculation submodule includes:

a desired direction determining unit, configured to determine a desired direction of the second AP according to location information of a UE initially associated with the first AP;

a sample value calculation unit, configured to calculate a sample value of the desired direction pattern of the second AP in each sampling direction;

a coefficient calculation unit, configured to calculate an antenna element weighting coefficient of the second AP according to the sampled values in the respective sampling directions of the expected pattern of the second AP;

And a power calculation unit, configured to calculate a total antenna transmit power of the second AP according to the antenna element weighting coefficient.

In conjunction with the third possible implementation of the second aspect, the fourth possible implementation in the second aspect In the mode, the sample value calculation unit includes:

a sampling direction obtaining subunit, configured to find (+1) a sampling direction in a desired pattern of the second AP according to the number of transmitting antennas of the second AP, where the number of the transmitting antennas is one; A calculation subunit for calculating the angle of each sampling direction with respect to the main direction by

Wherein, the angle of the nth sampling direction with respect to the main direction, the n = -K/2, ..., K/2, the wavelength is, the number of transmitting antennas, the antenna Array spacing

a coverage acquiring subunit, configured to acquire a coverage range of each sector divided by each sampling direction in the desired direction image;

a sample value calculation subunit, configured to obtain sample values in the respective sampling directions according to the coverage of each of the sectors;

The coefficient calculation unit is specifically configured to calculate the antenna element weighting of the second UI by:

Wherein;) is a weighting coefficient of the ίth antenna element of the second ,, where is the position of the 中th arranging element relative to a midpoint of all the elements of the second ,, the _{Ζ ί} = [ί-^1^, the t = l, 2, ..., , the _β „ is the sample value in the “sampling direction, the number of transmitting antennas, and the “sampling direction” The angle is the wavelength with respect to the angle of the main direction;

The power calculation unit is specifically configured to calculate an antenna transmit total power of the second AP by:

The weighting coefficient of the ίth antenna element of the second AP, where the transmission is

In conjunction with the second aspect, in a fifth possible implementation of the second aspect, the load estimation module includes:

a rate calculation sub-module, configured to re-establish association after the wireless access point association by calculating The rate available to the UE of the second AP:

Ri = D _c ^{sch BW} W log ₂ (1 + _n ^SINR SINRi ) '

The rate that is available to the ith UE, the scheduler coefficient of the second AP, the seventh ^βμ/ is a channel bandwidth coefficient of the second _AP , and the w is the The second channel's channel bandwidth, the ^^ is the signal-to-noise ratio coefficient, the signal-to-noise ratio of the first UE, and the transmission duration calculation sub-module, which is used to calculate the re-establishment of the wireless access point association by the following method The length of transmission required for the UE associated with the second UI:

The 7 is the transmission duration required by the ith UE, where is the rate requirement in the service requirement of the ith UE, where the rate is available to the first UE, and the UV is the The neighboring cell set of the cell c included in the second AP, the equal to 0 or 1, when 6^ =0, the load brought by the interference domain is increased, and when =1 is the load of the transmission domain, the ^ is equal to 0 or 1, when the working channel of the second AP is different from ΑΡ^, c=0, when the second AP is the same as the working channel of ΑΡ^, ^=1, the AP^ is the second AP AP to which the neighboring cell belongs, T _d '= ∑ is the transmission duration required by the UE associated with the APd;

The required total transmission duration calculation sub-module is configured to calculate, according to the manner, the total transmission duration 7 required to re-establish all the UEs associated with the second AP after the wireless access point association is performed;

T _c = ∑ - + ∑ min ∑a _i ,l

R- wherein, the second AP, the A is a rate requirement in a service requirement of the first UE, where the rate is obtainable by the first UE;

The total transmission duration calculation sub-module is configured to calculate the total transmission duration r _toi available to the second AP by:

τ where the (^ is the nominal rate of the second AP, the; ^ is the protocol efficiency factor of the media intervention control MAC layer of the second AP, and the R _flV ^ is the second AP The average available rate, the R _flV g, _c = ^ ∑ · , is the number of users associated with the second AP; the load calculation sub-module is configured to perform load estimation on the second AP by: The load is the load of the second AP, the 7 is the total transmission duration required by all UEs of the second AP, and the _rtoto ^ is the total transmission duration available to the second AP.

With reference to the second aspect, or the fifth possible implementation manner of the second aspect, in a sixth possible implementation manner of the second aspect, the KPI includes a load balancing coefficient, where the KPI calculation module is specifically used to pass the following The method calculates the load balancing factor:

[4] wherein the load balancing factor is the load of the second AP or the first AP, and the |AP| refers to the total number of APs managed by the AC control.

With reference to the second aspect, or the first, second, third, fourth, and fifth possible implementation manners of the second aspect, in a seventh possible implementation manner of the second aspect, the wireless The RF optimization device also includes:

And a triggering module, configured to execute the association module again if the KPI is greater than or equal to the key performance indicator threshold.

In a third aspect, an embodiment of the present invention provides a radio frequency optimization apparatus, including: an input device, an output device, a memory, and a processor;

The processor performs the following steps:

The user equipment information reported by the first wireless access point AP is received by the input device, where the user equipment information includes: the service requirement information, the location information, and the idle channel detection CCA of the user equipment UE that is initially associated with the first AP periodic statistics. Information, the first AP is controlled and managed by the wireless controller AC;

Determining whether it is necessary to increase the AP and increase the location of the AP according to the user equipment information reported by the first AP;

If the AP needs to be added and the added AP is the second AP, re-establish the wireless access point association with the UE initially associated with the first AP.

According to the signal to noise ratio and the service requirement of the UE after re-establishing the association of the wireless access point, the second The AP performs load estimation, and performs load estimation on the first port;

Calculating a key performance indicator based on the estimated load of the second turn and the load of the first turn;

Determining whether the threshold is greater than a preset key performance indicator threshold;

If the ΚΡΙ is less than the key performance indicator threshold, respectively, to the second by the output device

And the first ΑΡ beamforming parameter.

In conjunction with the third aspect, in a first possible implementation of the third aspect, the processor is specifically configured to perform the following steps:

Calculating, respectively, a path loss value of the UE that is initially associated to the first port to the second port; determining whether a path loss value of each UE to the second port is greater than a path loss threshold, respectively; a UE that describes a path loss threshold, associating it with the second ΑΡ; for a UE whose path loss value is greater than or equal to the path loss threshold, associating it with the first

Hey.

With reference to the third aspect, or the first possible implementation manner of the third aspect, in a second possible implementation manner of the third aspect, the processor is specifically configured to perform the following steps:

Generating a beam for the second frame based on re-going the access point associated with the second access point after re-establishing the wireless access point association;

Calculating a total transmit power of the antenna of the second chirp according to a beamforming generated for the second chirp;

Determining whether the total power transmitted by the antenna of the second antenna satisfies a power limitation condition;

If the total transmit power of the second antenna does not satisfy the power limitation condition, re-establish the wireless access point association with the UE initially associated with the first node;

If the second antenna's total transmit power meets the power limit condition, the UE is associated with the first frame based on re-establishing the wireless access point association, and the beam is shaped for the first frame; Generating a beam generated by the first frame, and calculating a total transmit power of the antenna of the first frame;

Determining whether the total power transmitted by the antenna of the first antenna satisfies a power limitation condition;

If the total transmit power of the first antenna does not satisfy the power limitation condition, the wireless access point association is re-established for the UE initially associated with the first node.

In conjunction with the second possible implementation of the third aspect, a third possible implementation in the third aspect In the mode, the processor is specifically configured to perform the following steps:

The antenna element weighting coefficient of the AP;

In conjunction with the third possible implementation of the third aspect, in a fourth possible implementation manner of the third aspect, the processor is specifically configured to perform the following steps:

Finding, according to the number of transmitting antennas of the second AP, in a desired direction of the second AP

+ 1 ) sampling directions, wherein the number of transmitting antennas is ^;

θ n = -i f

COS ^ηλ

, --,

Kd J

Obtaining a coverage range of each sector divided by each sampling direction in the desired direction image; acquiring sampling values in the respective sampling directions according to the coverage of each sector; calculating the second by:天线 Antenna array element weighting factor:

Wherein the ;) is the position of the ίth array of the second ΑΡ antenna array relative to the midpoints of all the array elements of the second ,

Said t = l, 2, ..., , said _β „ is the sample value in the “sampling direction, the number of transmitting antennas, the angle of the first sampling direction relative to the main direction, Described as wavelength;

Calculating the total antenna transmit power of the second AP by:

K

W , l,

t=l

The weighting coefficient of the ίth antenna element of the second AP is the number of transmitting antennas. In conjunction with the third aspect, in a fifth possible implementation manner of the third aspect, the processor is specifically configured to perform the following steps:

The rate obtainable by the UE associated with the second AP after re-establishing the wireless access point association is calculated as follows:

Ri = D _c ^{sch BW} W log ₂ (1 + _n ^SINR SINRi ) '

The rate that is obtained by the ith UE, the D is a scheduler coefficient of the second AP, and the parameter is 7 ^βμ/ is a channel bandwidth coefficient of the second _AP , where the w is The channel bandwidth of the second ,, the ^^ is a signal-to-noise ratio coefficient, and the signal-to-noise ratio of the first UE is calculated by recalculating the wireless access point association to the second The length of transmission required by the UE UE:

^T i = ^ - + ∑ ^a i, d ^X cd ^T , where 7 is the transmission duration required by the i th UE, and the rate requirement in the service demand of the i th UE, the 3⁄4 For the rate that is available to the first UE, the uv is a set of neighboring cells of the cell c included in the second AP, where the value is equal to 0 or 1, and when 6^=0, the load brought by the interference domain is increased. ^ =1 is the load increase brought by the transmission domain, the ^ is equal to 0 or 1, when the second AP channel is the same,

The length of transmission required for the UE associated with the APd;

T _c = ∑ ∑ min ∑a. _d ,\

R-wherein the second AP, the A is a rate requirement in a service requirement of the first UE, and the rate is obtainable by the first UE;

Calculating the total transmission duration r _toto available to the second AP:

Wherein the (^ nominal rate of said second AP, said; ^ media control (MAC) layer of the second AP intervention protocol efficiency factor, the _R flve _e to the second AP Average speed Rate, the R _flV ^ = ^ ∑ R, . , μρ _ε | is the number of users associated with the second ;; load estimation of the second AP by:

With reference to the third aspect, or the fifth possible implementation manner of the third aspect, in a sixth possible implementation manner of the third aspect, the processor is specifically configured to perform the following steps:

The KPI includes a load balancing coefficient, and the load balancing coefficient is calculated by:

With reference to the third aspect, or the first, second, third, fourth, and fifth possible implementation manners of the third aspect, in a seventh possible implementation manner of the third aspect, the processing It is specifically used to perform the following steps:

If the KPI is greater than or equal to the key performance indicator threshold, the wireless access point association is re-established for the UE initially associated with the first AP.

As can be seen from the above technical solutions, the embodiments of the present invention have the following advantages:

In the embodiment of the present invention, determining whether the AP needs to be added according to the user equipment information reported by the first AP, determining the location of the newly added AP when the AP needs to be added, and then re-establishing the wireless access point association for the UE initially associated with the first AP. Generating beamforming for the second AP and the first AP respectively, and then performing load estimation on the second AP and the first AP respectively, and then calculating a KPI according to the estimated load of the second AP and the load of the first AP, and finally Determining whether the KPI is greater than a preset threshold of a key performance indicator, and sending a beamforming parameter to the second AP and the first AP respectively when the KPI is greater than the threshold of the key performance indicator, so that the denseness can be completed when a service hotspot occurs. The UE re-associates and satisfies the KPI performance requirements, improves network capacity and coverage performance, and can be applied to coverage distance requirements and anisotropic channel conditions in different directions. DRAWINGS

1 is a schematic block diagram of a method for optimizing a radio frequency according to an embodiment of the present invention; FIG. 2 is a schematic diagram of coverage of four APs managed by an AC according to an embodiment of the present invention;

FIG. 2-b is a schematic diagram showing an implementation manner of adding an AP5 in the AC control management according to an embodiment of the present invention;

3 is a schematic structural diagram of a method for optimizing a radio frequency according to an embodiment of the present invention;

4 is a schematic flowchart of another method for optimizing a radio frequency according to an embodiment of the present invention; FIG. 5 is a schematic diagram of a desired direction of an added AP according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of a desired orientation of an original AP according to an embodiment of the present invention;

7-a is a schematic structural diagram of a radio frequency optimization apparatus according to an embodiment of the present invention;

7-b is a schematic structural diagram of an association module according to an embodiment of the present invention;

Figure 7-c is a schematic structural diagram of a beamforming module according to an embodiment of the present invention; Figure 7-d is a schematic structural diagram of a power calculation sub-module according to an embodiment of the present invention; FIG. 7-f is a schematic structural diagram of a load estimation module according to an embodiment of the present invention; FIG. 7-g is another schematic diagram of a load estimation module according to an embodiment of the present invention; Schematic diagram of the composition of a radio frequency optimization device;

FIG. 8 is a schematic structural diagram of another radio frequency optimization apparatus according to an embodiment of the present invention. detailed description

In order to make the object, the features and the advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. The described embodiments are only a part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of the present invention. The terms "first", "second" and the like in the specification and claims of the present invention and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a particular order or order. It is to be understood that the terms so used are interchangeable as appropriate, and are merely illustrative of the manner in which the objects of the same. In addition, the terms "comprises" and "comprising", and any variants thereof, are intended to cover a non-exclusive inclusion, so that a process, method, system, product, or device that comprises a series of units is not necessarily limited to those elements, but may include not clear Other units listed or inherent to these processes, methods, products or equipment.

The details are described below separately.

An embodiment of the radio frequency optimization method of the present invention is applicable to a wireless controller (AC, Access Controller) or a wireless access point (AP, Access Point), and the method may include: receiving a user equipment reported by the first AP The user equipment information includes: service requirement information, location information, and clear channel assessment (CCA) information of the user equipment (UE, User Equipment) initially associated with the first AP periodic statistics, and the first AP. Controlling and managing by the AC; determining, according to the user equipment information reported by the first AP, whether to increase the AP and increasing the location of the AP; if the AP needs to be added and the added AP is the second AP, the initial association with the first AP is performed. The UE re-establishes the wireless access point association; based on the UE that re-establishes the association of the wireless access point, respectively generates beamforming for the second AP and the first AP; and according to the UE that re-establishes the association of the wireless access point Noise ratio and service demand, performing load estimation on the second AP, and performing load estimation on the first AP Calculating a key performance indicator (KPI, Key Performance Indicator) according to the estimated load of the second AP and the load of the first AP; determining whether the KPI is greater than a preset key performance indicator threshold; if the KPI is smaller than the key performance indicator And a threshold, respectively, sending a beamforming parameter to the second AP and the first AP.

Referring to FIG. 1 , an embodiment of the method for optimizing a radio frequency of the present invention may specifically include the following steps:

101. Receive user equipment information reported by the first AP.

The user equipment information includes: the service requirement information, the location information, and the CCA information of the UE that is initially associated with the first AP periodically.

In the embodiment of the present invention, the AC control management has multiple APs, and one of the APs managed by the AC control is defined as the first AP. In the embodiment of the present invention, the AC is responsible for managing one AP, but the same applies to the AC. Responsible for managing multiple AP scenarios, the difference is that each AP is The user equipment information of the UE initially associated with each AP needs to be periodically reported.

In addition, in the embodiment of the present invention, the initial association refers to an association relationship that exists before re-establishing the association of the wireless access point. For example, the first AP is initially associated with three UEs, that is, wirelessly re-establishing three UEs. Before the access point is associated, the three UEs are associated with the first AP.

It should be noted that, in the embodiment of the present invention, the multiple APs that are managed by the AP need to periodically collect the user equipment information of the UEs that are associated with each other, where the user equipment information includes, but is not limited to, the service requirement information of the UE. The location information and the CCA information need to be determined by the AP according to the specific application scenario. The service requirement information of the UE may specifically refer to a user's traffic demand (traffic demand), such as a bit rate of the required service.

102. Determine, according to the user equipment information reported by the first AP, whether to increase the AP and increase the location of the AP.

In the embodiment of the present invention, for a WLAN network, because the coverage of the AP is relatively small, the service application of the user in the small area is more dynamic. At the same time, the number of users of a single AP service is limited, which can easily lead to AP saturation. The user equipment information reported by the first AP can obtain whether the first AP is saturated.

In the WLAN network, because of the user's mobile or service change, the user equipment information on the first AP can be learned that a service hotspot area appears in the coverage area of the first AP, and the original network cannot fully satisfy the The needs of the area, so it can be determined that a new AP needs to be added to the area to absorb the intensive users, and the location of the newly added AP is determined. Of course, it is also possible to determine to add two APs or more according to the user equipment information reported by each AP. In the embodiment of the present invention, in order to facilitate the description, a new AP is added as an example for description. The application scenario in which multiple APs are added may be performed in multiple operations according to the newly added AP implementation manner.

For details on how to add an AP to the original area, see Figure 2-a and Figure 2-b. Take an AC control and manage four APs as an example. The four APs are specifically API and AP2. AP3, AP4. As shown in FIG. 2-a, the coverage of four APs managed by the AC in the embodiment of the present invention is respectively provided, and the coverage ranges of the four APs are respectively indicated, and the small squares appearing in each coverage area indicate each For the initially associated UEs in the coverage area, the four APs respectively report the user equipment information of the UEs that are initially associated with each other. According to the user equipment information, it is determined that a large number of users are gathered in the small area of the original network, and the service distribution density is large. Determining that it is necessary to add an AP and determine the location of the newly added AP, as shown in FIG. 2-b, which is new in the AC control management in the embodiment of the present invention. This section describes how to add an AP to an AP5. For example, the case where a new AP is added to the AP5 is used as an example.

In Figure 2-b, a new cell (that is, a hotspot area) is overwritten by the newly added AP5, and the remaining other users continue to be covered by the original AP, but the user division and the coverage of each AP need to be reconsidered. In the description of the subsequent steps, in consideration of the fact that the influence of the radio frequency parameter adjustment is not maximized, the parameters of the original AP and the original AP around the hot spot area can be adjusted in the embodiment of the present invention, and the AP farther from the hot spot area is adjusted. There is no need to adjust, so the original AP refers to an AP that is surrounded by hot spots.

103. If the AP needs to be added and the added AP is the second AP, re-establish the wireless access point association with the UE initially associated with the first AP.

In the embodiment of the present invention, it is determined that a new AP needs to be added by using the foregoing step 102. In order to distinguish it from the first AP that is originally managed by the AC, the second AP may be defined as a second AP, and then the UE initially associated with the first AP is re-initiated. Wireless access point association, where association refers to assigning a UE to a specific AP and accepting its services. In the embodiment of the present invention, an AC is used as an example, and all UEs initially associated with the first AP in the AC are all UEs in the network. If the AC control management has multiple APs, step 103 is specific. It may be: Re-establishing a wireless access point association for all UEs initially associated with each AP.

In some embodiments of the present invention, re-establishing the wireless access point association for the UE initially associated with the first AP may include the following steps:

A1, respectively calculating a path loss value of the UE initially associated with the first AP to the second AP;

A2, respectively, determining whether the path loss value of each UE to the second AP is greater than a path loss threshold; A3, for a UE whose path loss value is smaller than the path loss threshold, associating it with the second AP; A4, for path loss A UE whose value is greater than or equal to the above path loss threshold is associated with the first AP.

In the foregoing steps A1 to A4, how to implement the re-establishment of the access point association for the UE, where the association criterion used is the path loss value, of course, in other embodiments of the present invention, other association criteria may also be adopted. For example, according to the number of users that the AP has been associated with, when the value is less than the preset threshold, the new UE may continue to be associated, otherwise the new UE is rejected. In step A4, for the UE whose path loss value is greater than or equal to the path loss threshold, the original association relationship is still maintained, that is, the association is initial. The associated AP may be based on other association criteria. For example, the UE may be associated with the AP with the strongest received signal according to the signal strength. According to this criterion, the original UE may be re-established with the first AP. The second AP is associated, and is not limited herein.

104. Generate a beamforming for the second AP and the first AP, respectively, based on the UE that re-establishes the association of the wireless access point.

In the embodiment of the present invention, after the radio access point association is re-established by the UE initially associated with the first AP, the second AP and the first AP respectively generate beamforming.

The AC originally controls and manages a first AP. After the AP is added, the AC controls the first AP and the second AP. The beamforming of the second AP and the first AP can change the coverage of the original AP. As shown in 2-b, after adding an AP5, the coverage of the original 4 APs changes. Beamforming refers to changing the shape of the antenna beam pattern to a specified beam shape by adjusting the excitation of each array element of the array antenna.

In some embodiments of the present invention, the beamforming is performed on the second AP and the first AP, respectively, based on the UE that is re-established by the wireless access point, and specifically includes the following steps:

Bl, generating a beamforming for the second AP according to the UE that is associated with the second AP after re-establishing the wireless access point association;

B2, calculating, according to the beamforming generated by the second AP, the total antenna power of the second AP;

B3. Determine whether the total antenna transmit power of the second AP meets the power limit condition. If the power limit condition is not met, perform step B4. If the power limit condition is met, perform step B5.

B4. If the total transmit power of the antenna of the second AP does not meet the power limitation condition, re-establish the wireless access point association with the UE initially associated with the first AP.

B5. If the total antenna transmit power of the second AP meets the power limitation condition, the UE is associated with the first AP after re-establishing the association of the wireless access point, and the beamforming is performed for the first AP, and then step B6 is performed. ;

B6. Calculate, according to a beamforming generated by the first AP, a total transmit power of the antenna of the first AP.

B7. Determine whether the total antenna transmit power of the first AP meets the power limit condition. If the power limit condition is not met, perform step B8.

B8. If the total transmit power of the antenna of the first AP does not meet the power limitation condition, the initial The UE associated with the first AP described above re-establishes the wireless access point association.

For step B1, by re-establishing the wireless access point association with the UE, some UEs are associated with the second AP, and based on the UEs associated with the second AP after re-association, the second AP is first beamformed, and then the steps are performed. In B3, it is determined whether the total power of the antenna of the second AP meets the power limitation condition. When the total power of the antenna of the second AP does not meet the power limitation condition, the beam shaping is not generated for the first AP, but the triggering step 103 is performed again. After the total power of the antenna of the second AP meets the power limitation condition, the beam is shaped for the first AP, and then the step B7 determines whether the total antenna power of the first AP meets the power limitation condition, and the antenna of the first AP When the total transmit power does not satisfy the power limit condition, the triggering step 103 is also required to be performed again. When the total transmit power of the antenna of the first AP satisfies the power limit condition, beamforming is performed on the second AP and the first AP. That is, only when the beam is shaped for the second AP and the first AP, the total transmit power of the antenna meets the power limitation condition, and the wireless access point association is valid again for the UE initially associated with the first AP, otherwise Step 103 is performed a plurality of times until the total power of the antenna transmission when the second AP and the first AP generate beamforming satisfy the power limitation condition.

In another embodiment of the present invention, the step B2 is configured to calculate the total transmit power of the antenna of the second AP according to the beamforming generated by the second AP, and specifically includes the following steps:

B21. The determining, according to location information of the UE that is initially associated with the first AP, determining a desired direction of the second AP.

B22. Calculate a sample value of the expected direction pattern of the second AP in each sampling direction. B23. Calculate an antenna array weighting coefficient of the second AP according to the sampled value of the expected direction pattern of the second AP in each sampling direction. ;

B24. Calculate a total antenna transmit power of the second AP according to the antenna element weighting coefficient. 105. Perform load estimation on the second AP and perform load estimation on the first AP according to the SNR and the service requirement of the UE that is associated with the wireless access point.

In the embodiment of the present invention, after the beamforming is performed on the first AP and the second AP, the second AP and the first AP are respectively performed according to the signal-to-noise ratio and the service requirement of the UE after the wireless access point association is re-established. The load estimation can be performed at the same time. The load estimation of the second AP can be performed first, and then the load estimation of the first AP is performed. The load estimation of the first AP can be performed first, and then the load estimation of the second AP is performed. The description is not limited. There are various implementation methods for load estimation. Detailed descriptions will be given in subsequent application examples. 106. Calculate a KPI according to the estimated load of the second AP and the load of the first AP. In the embodiment of the present invention, after estimating the load of the second turn and the load of the first turn in step 105, calculating the load according to the calculated load of the second turn and the load of the first turn. The KPI in the WL AN network may specifically include multiple indicators. For example, the KPI may specifically be a load balancing coefficient, and the KPI may also refer to a dropped call rate, a connection rate, a paging success rate, a data service download rate, and the like. Wait.

107. Determine whether the KPI is greater than a preset key performance indicator threshold.

In the embodiment of the present invention, after obtaining the KPI, the step 106 determines whether the value of the KPI is greater than a preset threshold value of the key performance indicator. If the value is less than the threshold value of the key performance indicator, the optimization of the radio frequency is successful, and the step is triggered. If the value of the key performance indicator is greater than or equal to the value of the key performance indicator, the optimization of the radio frequency fails, and the step 103 is performed to perform the re-establishment of the wireless access point association for the UE initially associated with the first AP.

108. If the KPI is less than the threshold of the key performance indicator, send a beamforming parameter to the second AP and the first AP respectively.

In the embodiment of the present invention, it can be seen from the judgment result of step 107 that if the KPI can meet the requirements of the key performance indicators, the radio frequency optimization can be completed, and the beamforming is performed on the second AP and the first AP respectively. The parameter is such that the second AP and the first AP adjust the respective antenna elements according to the beamforming parameters, wherein the beamforming parameter may specifically refer to the weight of the antenna element.

According to the foregoing embodiment, it is determined whether the AP is required to be added according to the user equipment information reported by the first AP, determining the location of the newly added AP when the AP needs to be added, and then re-establishing the wireless access point association for the UE initially associated with the first AP. Generating beamforming for the second AP and the first AP respectively, and then performing load estimation on the second AP and the first AP respectively, and then calculating a KPI according to the estimated load of the second AP and the load of the first AP, and finally Determining whether the KPI is greater than a preset threshold of a key performance indicator, and sending a beamforming parameter to the second AP and the first AP respectively when the KPI is greater than the threshold of the key performance indicator, so that the denseness can be completed when a service hotspot occurs. The UE re-associates and satisfies the KPI performance requirements, improves network capacity and coverage performance, and can be applied to coverage distance requirements and anisotropic channel conditions in different directions. To facilitate a better understanding and implementation of the above solutions of the embodiments of the present invention, the corresponding application scenarios are exemplified below for specific description.

First introduce the overall implementation plan: Under the premise of ensuring the existing coverage, the new network The topology is re-divided; the existing AP and the newly added AP are re-beamformed, and the same beamforming can be applied to the traffic channel and the broadcast channel.

Take a Coordinator as an example in the AC. The Coordinator is a functional module that can be implemented in the AC or in the AP. The Coordinator is a centralized deployment method in the AC. , Coordinator is a semi-distributed deployment party in the AP.

The Coordinator function module is located in the AC. For example, an AC is used to manage an AP. The AC is defined as an API. The AC determines the UE information, such as the location information of the UE, the service requirements of the UE, and the CCA parameters of the UE. Then, the AP is added, and then the AC is added to the API. AP2 performs load estimation and KPI calculation under different beamforming. Finally, the API and AP2 perform beamforming based on the beam shaping parameters issued by the Coordinator.

The following is a specific process, as shown in FIG. 4, which is a schematic flowchart of a method for optimizing a radio frequency in the embodiment of the present invention. The specific steps may include the following steps:

401. The user equipment information of the initially associated UE is counted in each AP period, where the user equipment information includes: service requirement information, location information, and CCA information.

402. The foregoing user equipment information that is reported by each AP period is reported.

403. The AC determines whether the AP needs to be added according to the user equipment information reported in each AP period.

404. If the AC confirms that an AP needs to be added, determine the location of the newly added AP.

405. If there is a new AP, the AP is re-associated with the UE of the entire network.

The all-network UE refers to all UEs initially associated in all APs managed by the AC control.

406. The AC generates a beamforming manner of each AP based on the re-established AP association of the UE, and includes forming an existing AP and a new AP to generate a beamforming.

The step 406 may specifically include the following steps:

4061. The AC first generates a beamforming of the newly added AP.

4062. The AC determines whether the total antenna transmit power of the newly added AP meets the power limit condition. If yes, the triggering step 4063 is performed. If not, the triggering step 405 is performed again.

4063. The AC generates a beamforming of the original AP.

407. The AC performs load estimation and KPI calculation according to the current coverage of each AP.

408. Determine, according to whether the calculated KPI meets the load balancing condition, whether the UE of the entire network needs to perform AP association again. If yes, the triggering step 405 re-associates the AP with the entire network. If not, Triggering step 409 is performed.

409. Each AP satisfies the load balancing condition, and the AC sends its corresponding beamforming parameter to each AP, and each AP performs beamforming accordingly.

Next, the specific application scenarios of each step are illustrated.

For step 405, the AC re-associates the AP with the entire network. This can be achieved by:

Target: Association of UEs.

Input: UE location and service requirements, AP location.

Output: The association result of the UE to the AP.

The implementation method is as follows:

(1) Assuming that the newly added AP is APc, the AP association is performed on the newly added APc. The association of the user i to the APc depends on whether the path loss value (the path loss) satisfies < ΡΖ^, where i3⁄4tW^ indicates the user. The path loss from i to APc indicates the path loss threshold. User i is associated with APc only when the path loss is less than a certain threshold.

(2) For each user originally associated with the original AP, except for the user who was removed by the newly added AP, the remaining users are still associated with themselves.

It should be noted that the newly added AP indicates the second AP that appears in the foregoing embodiment, and the association with the AP is equivalent to clustering the entire network UE, and each AP is a cluster. Different correlation modes allow different clusters to be obtained. Step (1) above may also adopt other association criteria. Step (2) above may also use some criteria to re-associate all remaining UEs with the original AP, and disrupt the original association relationship, which is equivalent to re-establishing Clustering, no more details here.

For the step 406AC, the beamforming of each AP is generated based on the AP association performed by the UE, which can be implemented by:

Objective: To design a beam that covers all associated users and to ensure reasonable coverage using various algorithms for beam forming.

Input: User's location information, channel status between the user and the AP, AP antenna downtilt. Output: The base station antenna element weighting coefficient corresponding to the beam of all associated users, and the required transmit power value of the beam.

In the following description, the newly added AP and the original AP are sequentially beamformed. Among them, the beamforming of the newly added AP is performed first. If the calculation result satisfies the power constraint condition, the original The beam is shaped by the AP. Otherwise, the newly added AP cannot overwrite the currently associated user. You need to re-associate the AP with the user.

It should be noted that the desired direction of the newly added AP is an overlay including all the associated UEs. In the embodiment of the present invention, the user equipment cartridge can be referred to as a user. Next, the steps to determine the sample value of the desired pattern are described in detail:

For the number of sampling points of the odd-numbered antenna elements, the number of sampling points for the even-numbered antenna elements is K + 1 ). Since the number of base station antennas is usually even, the following takes 1) sampling points as an example, where is the number of transmitting antennas of the base station. .

First, find a specific ( + 1 ) sampling direction in the radiation pattern of the base station antenna. Relative to the main direction, their angles are

,

Here, the above is the angle of the nth sampling direction with respect to the main direction, and the above n = -K/2, ..., K/2, the above is the wavelength, and the above is the number of transmitting antennas, and the above is the spacing of the antenna elements.

If =8, then = -4, -3, -2, -1,0, 1,2, 3,4, - total +1 = 9 directions.

According to the channel condition, the fading value added to each user is calculated, and the relative direction of the user and the newly added ΑΡ is marked on the radiation pattern, as shown in FIG. 5, the desired directional pattern is added to For example, if the number of transmitting antennas is 8, the direction of the sampling point is 9 and the new one is located at the center of the circle. The black circle represents the location of the user. In Figure 5, four user equipments are shown, which are UE1. UE2, UE3, UE4. In this way, all users fall into K small sectors. The distance between the user and the new increase is based on the fading condition, not the distance of the geographical distance, that is, the farther the user is fading.

For each UE that is newly associated, find a corresponding "virtual UE": before the arrangement is added, the coverage point of the original 衰 in the direction of the associated UE is the largest, and the point is the virtual UE. position. For each virtual UE, if the fading value to the new ΑΡ is less than the fading value of its corresponding associated UE to the original ,, the virtual UE is removed, otherwise the virtual UE is reserved. The reserved virtual UEs are also marked on the radiation pattern and are represented by black triangles. Two virtual UEs are shown in Fig. 5, which are virtual UE 1 and virtual UE 2.

Next, the associated UE and the virtual UE of the newly added AP are included in the coverage of the newly added AP. Both types of UEs are treated the same. The farthest user of the small sector (including the associated UE and the virtual UE) plus a certain margin value, for example, may be 5%, that is, the coverage of the new AP in the small sector, as shown in the black arc of FIG. The line indicates the coverage of the small sector. The coverage of the adjacent small sectors in the common sampling direction is based on the farther one.

If a small sector has no user distribution, the coverage of the small sector is the same as the coverage of the small sector with its user distribution.

As shown in Fig. 5, the black squares appearing in each sampling direction indicate the sample values in the respective sampling directions, and nine sample values are given in Fig. 5.

Next, the steps to determine the sample values in the desired pattern are summarized as follows:

(1), according to a specific rule within the range of the desired direction, (+1) directions, forming a small fan shape;

(2) marking the user in the desired direction according to the fading size;

(3) In each small fan shape, a certain margin is added to the cornerstone of the fading value of the farthest user as the coverage of the small fan shape;

(4) If there is no user distribution in a small fan shape, the coverage of the small fan shape is the same as the small fan shape of the adjacent users;

(5) According to the coverage of each small sector, the sampling values in the upward direction are obtained, and the coverage in the common sampling direction of the adjacent small sectors is based on the farther one.

Next, the sampled values in the respective sampling directions may be α „ , η −ΚΙ1, . . . , ΚΙ1, and the antenna element weighting coefficients on the antenna elements of the newly added AP are calculated as follows:

Wherein, the above /zJ is the γth antenna element weighting coefficient of the newly added AP, and the above is the position of the ίth array element relative to the midpoint of all the array elements of the second ,, the above _Ζί= ^-ϋ1^, on

2) t = l, 2, ..., , above is the sample value in the "sampling direction", the above is the number of transmitting antennas, and the above is the angle of the "sampling direction with respect to the main direction, and the above is the wavelength.

Of course, other methods may be used for beam forming in the embodiments of the present invention. For example, there is no limit.

As can be seen from the foregoing description, / is a vector containing amplitude and phase values. At this time, the total transmit power of the antenna (the transmit power required for the beam) is the sum of the amplitude values (ie, absolute values) of the antennas. The total transmit power of the antennas of the newly added APs can be calculated as follows:

The above / is the weighting coefficient of the γth antenna element of the second AP, and the above is the number of transmitting antennas.

Next, it is judged whether the sum of the total antenna powers of the antenna elements of the newly added antennas satisfies the power limitation condition, that is, the maximum transmission power is not exceeded. If it is not satisfied, the UE association needs to be re-established, and if it is satisfied, the original beamforming is continued.

The following describes the beamforming method of the original ΑΡ:

For each original ΑΡ, on the basis of its original coverage pattern, the location of the UE associated with the newly added ΑΡ is removed, and the remaining place is its desired direction.

According to the channel condition, the fading value of each UE associated with the newly added ΑΡ is calculated, and the relative direction of the user and ΑΡ is combined with the radiation pattern, as shown in FIG. Direction map. The user falls into a small fan shape, and the black circle is represented as a user. The distance between the user and ΑΡ is determined by the fading condition, not the distance of the geographical distance, that is, the farther the user with the fading is.

In Figure 6, the black squares represent the expected values of the desired pattern, and the following steps are made to determine the sample values in the desired pattern:

(1) For each small fan shape, if there is a black circle, the black circle closest to the center of the circle is reduced by a certain margin, for example 5%, as the coverage of the original sector in the small sector, as shown in the figure. The black arc shown in 6 indicates the coverage of the small sector.

(2) For each small sector, if there is no black circle, the farthest coverage of the original is the coverage of the small sector.

(3) The coverage in the common sampling direction of adjacent small sectors is based on the farther one. As shown

As shown in Fig. 6, the black square indicates the sampled value in each sampling direction.

It should be noted that, in the embodiment of the present invention, the function of the foregoing step (1) is to make the seamless coverage of the original ΑΡ and the new 尽量 as much as possible; the function of the step (2) is to ensure the original without referring to the UE. There is coverage of the AP. For the determination of the coverage of the original AP, other methods can also be used, which are only examples.

For the step 407, the load estimation and the KPI calculation are performed according to the current coverage of each AP, which can be implemented as follows:

Target load (Load) and KPI.

Enter the SINR, the user's traffic demand.

Output KPI (Load Balancing Factor).

First calculate, the rate that users who add APc can get

Ri = D _c ^{sch BW} W log ₂ (1 + Luo),

Wherein, the above 3⁄4 is the rate that the first UE can obtain, and the above £> is entered? (: the scheduler coefficient, above; 7^^ is the input channel (: channel bandwidth coefficient, the above W is the channel bandwidth of APc, above; ^ ^Λ3⁄4 is the signal-to-noise ratio coefficient, and the above S/A^ is the above-mentioned first UE Signal to noise ratio

It should be noted that the user is the first UE, and its signal-to-noise ratio ^/ _;

SINR;

P ^noise + ∑(i -«, _c ^, where is the power of the local cell and the neighboring cell received by the user, respectively, P'

Rate, is the set of neighbors of cell c,

ί 0, and the working channel is different

c' ^d 11, otherwise

Where ΑΡ^ refers to the AP to which the neighboring cell belongs, and CCA is the detection threshold of the user. The transmission time required by the user with the connection rate is 为·

In combination with the SINR calculation formula, the above 7; is the transmission duration required by the first UE, and the Di is the rate requirement in the service requirement of the first UE, and the foregoing 3⁄4 is the rate obtainable by the first UE, For the neighboring cell set of the cell c included in the foregoing second AP, the above _iW is equal to 0 or 1, when The load increase caused by the interference domain is 0. When the load of ^=1 is the transmission domain, the transmission time required by the AP is associated with the UE.

The total transfer duration required for all users associated with the new APC is

For the second AP described in the foregoing embodiment, the foregoing A is a rate requirement in a service requirement of the first UE, and the foregoing is a rate obtainable by the first UE.

It should be noted that the first item in the above formula considers the interference of neighboring cell signals, and the second item considers the interference of neighboring cell competition. Considering the interference within the cell, the total transmission available for the APc with a nominal rate of C _c :

Wherein, the above C _e is the nominal rate of the APc, the above; ^ is the protocol efficiency factor of the media access control (MAC, Media Access Control) layer of the _APc , and the above R _{flVP r} is the average obtainable rate of the APc, above, μρ _ε |Number of users associated with the above APC

It should be noted that it can be obtained by:

p ρτ

Rtr ^r s ⁱ s

'° ^-Pt + PtrP _s T _s + P _tr ^-P _s ) ^T c ; where, the meanings and values of the items in the above formula are shown in Table 1 below (where Μ = μρ)) Calculate the meaning of each parameter in the formula. The average length of time required to successfully transmit a packet is taken.

Statistics

The average duration of the T _c packet collision, taking the statistical value σ MAC layer slot length, which is a system constant Any station transmits data in a random time slot τ

The probability

V group collision phase failure rate probability of successful transmission

_{P tr = \ - {\ -} T) n the probability of packet transmission

Among them, the packet collision probability p and the data transmission probability r in Table 1 above can be obtained by: p = \-(\-T) ^nl ,

q

k (I-P)

Ll (l- p)(l- (ll .) where w is the initial competing window, o(H"o + 1) . q{W _Q十1)

2(ί -(/) , 1 - (1 -

-p{l ~ q) ~ qil ~ p}"} ten

— ― ¹ - ^ , where is the maximum number of retransmissions of APc, and g is the probability of packet arrival. Depending on the final model of the service model, the estimated load of APc is

Pc

Total. c where the above is the load of the second AP, 7 is the total transmission duration required by all UEs of the second AP, and Ttoto^ is the total transmission duration available to the second AP.

The above method of estimating the load considers the carrier sensing characteristics and co-channel interference of the WLAN, greatly improves the accuracy of the load detection, and gives a relationship with the channel allocation.

Next, the KPI is used as the load balancing factor to calculate the KPI. For the purpose of load balancing of the entire network (including the new AP and the original AP), the load balancing coefficient is:

The above is the load balancing coefficient, where the load is the second AP or the first AP, and the |AP| refers to the total number of APs managed by the AC, including the newly added AP and the original AP.

After calculating the KPI, that is, the load balancing coefficient, when the load balancing coefficient is greater than the preset load balancing threshold (in real time, the method for optimizing the radio frequency provided by the embodiment of the present invention is completed, the entire process may be exited; otherwise, the UE correlation coefficient of the newly added AP is modified. (ie, the path loss threshold is re-associated and beamformed until the network-wide load balancing is satisfied.

According to the description of the above application scenario, based on the new load estimation model, the embodiment of the present invention can accurately obtain the KPI of the whole network, and thus the RF parameters can be easily evaluated. The beamforming and load estimation models can be easily performed. Obtain the required optimal RF parameters and ensure the original network coverage. The traffic channel and the broadcast channel can share the same beamforming, which reduces the cost and complexity of the AP.

According to the foregoing embodiment, it is determined whether the AP is required to be added according to the user equipment information reported by the first AP, determining the location of the newly added AP when the AP needs to be added, and then re-establishing the wireless access point association for the UE initially associated with the first AP. Generating beamforming for the second AP and the first AP respectively, and then performing load estimation on the second AP and the first AP respectively, and then calculating a KPI according to the estimated load of the second AP and the load of the first AP, and finally Determining whether the KPI is greater than a preset threshold of a key performance indicator, and sending a beamforming parameter to the second AP and the first AP respectively when the KPI is greater than the threshold of the key performance indicator, so that the denseness can be completed when a service hotspot occurs. The UE re-associates and satisfies the KPI performance requirements, improves network capacity and coverage performance, and can be applied to coverage distance requirements and anisotropic channel conditions in different directions.

It should be noted that, for the foregoing method embodiments, they are all described as a series of action combinations for the description of the device, but those skilled in the art should understand that the present invention is not limited by the described action sequence. Because certain steps may be performed in other orders or concurrently in accordance with the present invention. In the following, those skilled in the art should also understand that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

In order to facilitate the implementation of the above solution of the embodiments of the present invention, related devices for implementing the above solutions are also provided below. Referring to FIG. 7-a, a radio frequency optimization apparatus 700 according to an embodiment of the present invention may be applied to an AC or an AP, and may include: a receiving module 701, an AP evaluation module 702, an association module 703, and a beam assignment. a shape module 704, a load estimation module 705, a KPI calculation module 706, a KPI determination module 707, and a transmission module 708, where

The receiving module 701 is configured to receive the user equipment information reported by the first wireless access point AP, where the user equipment information includes: the service requirement information, the location information, and the idleness of the user equipment UE that is initially associated with the first AP periodically. The channel detects CCA information, and the first AP is controlled and managed by the wireless controller AC;

The AP evaluation module 702 is configured to determine, according to the user equipment information reported by the first AP, whether to increase the AP and increase the location of the AP.

The association module 703 is configured to: if the AP needs to be added, and the added AP is the second AP, re-establish the wireless access point association with the UE initially associated with the first AP;

The beamforming module 704 is configured to generate beamforming for the second AP and the first AP, respectively, based on re-establishing the UE after the wireless access point is associated;

The load estimation module 705 is configured to perform load estimation on the second AP and perform load estimation on the first AP according to re-establishing a signal to noise ratio (UE) and a service requirement of the UE after the wireless access point is associated;

The KPI calculation module 706 is configured to calculate a key performance indicator KPI according to the estimated load of the second AP and the load of the first AP;

The KPI judging module 707 is configured to determine whether the KPI is greater than a preset key performance indicator threshold, and the sending module 708 is configured to: if the KPI is less than the key performance indicator threshold, respectively, to the second AP and the first An AP sends a beamforming parameter.

As shown in Figure 7-b, in some embodiments of the present invention, the association module 703 may specifically include: a path loss calculation sub-module 7031, a path loss determination sub-module 7032, a first association sub-module 7033, and a second Association sub-module 7034, wherein

The path loss calculation sub-module 7031 is configured to separately calculate a path loss value of the UE initially associated with the first AP to the second AP;

The path loss determining sub-module 7032 is configured to determine, respectively, whether a path loss value of each UE to the second AP is greater than a path loss threshold;

The first association submodule 7033 is configured to: for a UE whose path loss value is smaller than the path loss threshold, It is associated to the second AP;

The second association sub-module 7034 is configured to associate the UE with a path loss value greater than or equal to the path loss threshold to the first AP.

As shown in Figure 7-c, in some embodiments of the present invention, the beamforming module 704 includes: a second beamforming sub-module 7041, a power calculation sub-module 7042, a power judging sub-module 7043, and a trigger. a module 7044, a first beamforming submodule 7045, wherein

a second beamforming sub-module 7041, configured to generate a beamforming for the second AP, based on re-establishing a wireless access point association and associated with the UE of the second AP;

The power calculation sub-module 7042 is configured to calculate a total antenna transmit power of the second AP according to a beamforming generated by the second AP.

The power judging sub-module 7043 is configured to determine whether the total transmit power of the antenna of the second AP meets a power limiting condition;

The triggering sub-module 7044 is configured to perform the association module again if the total transmit power of the antenna of the second AP does not meet the power limitation condition;

a first beamforming sub-module 7045, configured to: if the total transmit power of the antenna of the second AP meets a power limitation condition, based on the UE that is associated with the first AP after re-establishing the association of the wireless access point, An AP generates beamforming;

The power calculation sub-module 7042 is further configured to calculate a total antenna transmit power of the first AP according to a beamforming generated by the first AP.

The power determining sub-module 7043 is configured to determine whether the total transmit power of the antenna of the first AP meets a power limiting condition;

The triggering sub-module 7044 is further configured to perform the association module again if the total transmit power of the antenna of the first AP does not meet the power limitation condition.

Referring to FIG. 7-d, in some embodiments of the present invention, the power calculation sub-module 7042 may specifically include the following units: a desired direction determining unit 70421, a sampled value calculating unit 70422, a coefficient calculating unit 70423, and a power calculation. Unit 70424, wherein

a desired direction determining unit 70421, configured to determine a desired direction of the second AP according to location information of a UE initially associated with the first AP;

a sample value calculation unit 70422, configured to calculate a sample value of a desired pattern of the second AP in each sampling direction; The coefficient calculation unit 70423 is configured to calculate an antenna array weighting coefficient of the second AP according to the sampled values in the respective sampling directions of the expected pattern of the second AP;

The power calculation unit 70424 is configured to calculate an antenna transmit total power of the second AP according to the antenna element weighting coefficient.

Referring to FIG. 7-e, in some embodiments of the present invention, the sample value calculation unit 70422 includes: a sampling direction acquisition subunit 704221, an angle calculation subunit 704222, a coverage acquisition subunit 704223, and a sample value calculation. Subunit 704224, where

a sampling direction obtaining sub-unit 704221, configured to find (+1) a sampling direction in a desired pattern of the second AP according to the number of transmitting antennas of the second AP, where the number of transmitting antennas is one;

An angle calculation subunit 704222, configured to calculate each sampling direction relative to the primary party by:

Wherein, the angle is the angle of the nth sampling direction with respect to the main direction, the n = -K/2, ..., K/2, the Α is a wavelength, and the number is the number of transmitting antennas, where An inter-array inter-band coverage obtaining sub-unit 704223, configured to acquire a coverage range of each sector that is divided by each sampling direction in the desired direction image;

The sampled value calculation subunit 704224 is configured to obtain sample values in the respective sampling directions according to the coverage of each of the sectors.

The coefficient calculation unit 70423 is specifically configured to calculate the antenna element of the second antenna by adding the following manner

Wherein;) is a weighting coefficient of the ίth antenna element of the second ,, where is the position of the 中th arranging element relative to a midpoint of all the elements of the second ,, the _{Ζ ί} = [ί-^1^, the t = l, 2, ..., , the _β „ is the sample value in the “sampling direction, the number of transmitting antennas, and the “sampling direction” The A is a wavelength with respect to an angle of the main direction;

The power calculation unit 70424 is specifically configured to calculate an antenna of the second AP by: Total power

W,l,

The / is the weighting coefficient of the γth antenna element of the second AP, and the number is the number of transmitting antennas.

As shown in Figure 7-f, in some embodiments of the present invention, the load estimation module 705 includes: a rate calculation sub-module 7051, a transmission duration calculation sub-module 7052, a required total transmission duration calculation sub-module 7053, and a The total transmission duration calculation sub-module 7054, the load calculation sub-module 7055, wherein the rate calculation sub-module 7051 is configured to calculate, according to the manner, the rate obtainable by the UE associated with the second AP after re-establishing the wireless access point association:

Ri = D _c ^{sch BW} W log ₂ (1 + _n ^SINR SINRi ) '

The rate that is available to the first UE, the D is a scheduler coefficient of the second AP, and the 7 ^{β Λ} is a channel bandwidth coefficient of the second AP, where the W is the The channel bandwidth of the second frame, the signal is a signal-to-noise ratio (SNR), and the signal-to-noise ratio of the first UE is used. The transmission time calculation sub-module 7052 is configured to re-establish the wireless access point association by using the following method. The length of transmission required for the UE associated with the second UI:

The 7 is a transmission duration required by the ith UE, where A is a rate requirement in a service requirement of the ith UE, and the QoS is a rate achievable by the first UE, where the w is a set of neighboring cells of the cell C included in the second AP, where the value is equal to 0 or 1, when 6^=0, the load brought by the interference domain is increased, and when =1 is the load brought by the transmission domain, the ^ is equal to 0 or 1, when the second AP track is the same,

The length of transmission required for the UE associated with the APd;

The required total transmission duration calculation sub-module 7053 is configured to calculate, according to the manner, the total transmission duration 7 required to re-establish the wireless access point association and all UEs associated with the second AP;

D

T _c = ∑ ∑ min ∑a _i ,\

R, the second AP, the D, is the rate in the service requirement of the first UE Demand, the rate that is available for the first UE;

The total transmission duration calculation sub-module 7054 is configured to calculate the total transmission duration r _toto ^ available to the second AP by _:

τ

D '

Wherein, (^ is the nominal rate of the second AP, the; ^ is the media intervention control M efficiency factor of the second AP, and the ^ is the average available rate of the second AP The R _flV g R,. , is the number of users associated with the second AP;

The load calculation sub-module 7055 is configured to perform load estimation on the second AP by:

Pc = ^- ,

Total ,c

In some embodiments of the present invention, the KPI includes a load balancing coefficient, and the KPI calculation module is specifically configured to calculate the load balancing coefficient by:

|ΑΡ|∑Λ ² '

The load balancing factor is the load of the second port or the first port, and the |ΑΡ| refers to the total number of APs managed by the AC control.

As shown in Figure 7-g, in some embodiments of the present invention, the radio frequency optimization apparatus 700 further includes: a triggering module 709, configured to perform the re-execution if the KPI is greater than or equal to the critical performance indicator threshold. The association module.

It should be noted that the information interaction, the execution process, and the like between the modules/units of the foregoing device are the same as the embodiment of the method of the present invention. Referring to the description in the foregoing method embodiments of the present invention, details are not described herein again.

According to the foregoing embodiment, the AP evaluation module determines whether the AP needs to be added according to the user equipment information reported by the first AP, determines the location of the newly added AP when the AP needs to be added, and then the association module re-executes the UE initially associated with the first AP. The wireless access point is associated, and the beamforming module respectively generates beamforming for the second AP and the first AP, and then the load estimating module respectively pairs the second AP and the first AP. Performing load estimation, the KPI calculation module calculates a KPI according to the estimated load of the second AP and the load of the first AP, and finally the KPI determining module determines whether the KPI is greater than a preset key performance indicator threshold, where the KPI is greater than the key performance. In the case of the indicator threshold, the sending module sends a beamforming parameter to the second AP and the first AP respectively, so that the re-association of the dense UE can be completed when the service hotspot occurs, and the KPI performance requirement is met, and the network capacity is improved. Coverage performance, can be applied to coverage distance requirements in different directions and anisotropic channel conditions. The embodiment of the present invention further provides a computer storage medium, wherein the computer storage medium stores a program, and the program execution includes some or all of the arrangements described in the foregoing method embodiments.

Next, another radio frequency optimization apparatus according to an embodiment of the present invention is introduced. Referring to FIG. 8, the radio frequency optimization apparatus 800 includes:

The input device 801, the output device 802, the processor 803, and the memory 804 (wherein the number of processors 803 in the radio frequency optimization device 800 may be one or more, and one processor in Fig. 8 is exemplified). In some embodiments of the present invention, the input device 801, the output device 802, the processor 803, and the memory 804 may be connected by a bus or other means, wherein the bus connection is taken as an example in FIG.

The input device 801 is configured to receive user equipment information that is reported by the first wireless access point AP, where the user equipment information includes: service requirement information, location information, and user equipment UEs that are initially associated with the first AP periodically. The idle channel detects CCA information, and the first AP is controlled and managed by the wireless controller AC.

The processor 803 is configured to: perform, according to the user equipment information reported by the first AP, whether to increase the AP and increase the location of the AP; if the AP needs to be added and the added AP is the second AP, the initial association is The UE of the first AP re-establishes the wireless access point association; based on the UE that re-establishes the association of the wireless access point, respectively generates beamforming for the second AP and the first AP; Determining a load-to-noise ratio and a service requirement of the UE after the association, performing load estimation on the second AP, and performing load estimation on the first AP; and estimating the load of the second AP and the first The AP calculates the key performance indicator KPI; determines whether the KPI is greater than a preset key performance indicator threshold.

The output device 802 is configured to send a beamforming parameter to the second AP and the first AP respectively if the KPI is less than the key performance indicator threshold.

In some embodiments of the present invention, the processor 803 is specifically configured to perform the following steps: separately calculating a path loss value of the UE that is initially associated with the first AP to the second AP; determining whether a path loss value of each UE to the second AP is greater than a path loss threshold; and determining that the path loss value is smaller than the path The thresholded UE is associated with the second AP; for a UE whose path loss value is greater than or equal to the path loss threshold, it is associated with the first AP.

In some embodiments of the present invention, the processor 803 is specifically configured to: perform beamforming for the second AP according to the UE that is associated with the second AP after re-establishing the wireless access point association; Determining a beam generated by the second AP, calculating a total antenna power of the second AP; determining whether a total power of the antenna of the second AP meets a power limitation condition; if the antenna of the second AP is transmitting The total power does not meet the power limitation condition, and the wireless access point association is re-established for the UE initially associated with the first AP; if the total transmit power of the antenna of the second AP meets the power limitation condition, the radio access is re-based. A UE associated with the first AP is configured to perform beamforming for the first AP, and a total antenna power of the first AP is calculated according to a beamforming generated by the first AP; Whether the total transmit power of the antenna of the first AP meets a power limitation condition; if the total transmit power of the antenna of the first AP does not satisfy the power limit condition, the initial association is again UE re first AP associated with the wireless access point.

In some embodiments of the present invention, the processor 803 is specifically configured to: perform: determining a desired direction pattern of the second AP according to location information of a UE initially associated with the first AP; and calculating the second a sampled value of the expected pattern of the AP in each sampling direction; calculating an antenna element weighting coefficient of the second AP according to the sampled values in the respective sampling directions of the expected pattern of the second AP; The meta-weighting coefficient calculates the total antenna transmit power of the second AP.

In some embodiments of the present invention, the processor 803 is specifically configured to perform the following steps: finding + 1) sampling directions in a desired pattern of the second AP according to the number of transmitting antennas of the second AP, where The number of the transmitting antennas is ^;

Θ = 008-^ , — ,

Kd)

Wherein, the angle is the angle of the nth sampling direction with respect to the main direction, the n = -K / 2, . . . , K / 2, the Α is a wavelength, and the number is the number of transmitting antennas, where An antenna array element spacing; obtaining a coverage area of each of the fan shapes divided by the respective sampling directions in the desired direction image; obtaining sampling values in the respective sampling directions according to the coverage of each of the fan shapes; Calculating the antenna element weighting coefficients of the second AP in the following manner:

Wherein, the parameter is a weighting coefficient of the ίth antenna element of the second AP, where the position of the ίth array element relative to the midpoint of all the elements of the second ,, the _{Ζ ί} = [ί-^1^, the t = l, 2, ..., , the _β „ is the sample value in the “sampling direction, the number of transmitting antennas, and the “sampling direction” The angle is the wavelength with respect to the angle of the main direction;

Calculating the total antenna transmit power of the second AP by:

W,l,

In some embodiments of the present invention, the processor 803 is specifically configured to: calculate, according to a manner, a rate that can be obtained by re-establishing a wireless access point association and being associated with the UE of the second UI:

Ri = D _c ^{sch BW} W log ₂ (1 + _n ^SINR SINRi ) '

The rate that is available to the ith UE, the scheduler coefficient of the second AP, the 7 ^fiW is a channel bandwidth coefficient of the second AP, and the W is the second a channel bandwidth of the AP, where the signal is a signal-to-noise ratio (SNR), the signal-to-noise ratio of the first UE is calculated, and the UE associated with the second AP after re-establishing the association of the wireless access point is calculated as follows The required transmission duration is: T _i = ^ - + ∑ a _id x _cd T _d ' , where 7 is the transmission duration required by the i th UE, and the A is in the service requirement of the i th UE Rate requirement, the ratio is a rate that is available to the first UE, where w is a set of neighboring cells of the cell c included in the second AP, where the value is equal to 0 or 1, and when 6^=0, it is an interference domain band. The incoming load increases. When ^=1 is the load increase caused by the transmission domain, the ^ is equal to 0 or 1, when the second AP channel is the same,

Γ the length of transmission required for the AP associated with the APd; Calculating the total transmission duration 7 required to re-establish all UEs associated with the second AP after re-establishing the wireless access point association by:

T _c = ∑ -r- + ∑ min ∑a _i ,\

Calculating the total transmission duration r _toto ^ available to the second AP by:

T _cc ' where (^ is the nominal rate of the second AP, the; ^ is the media intervention control MAC efficiency factor of the second AP, the ^ is the average of the second AP The available rate, the R _flV g, _c = R, . , is the number of users associated with the second AP;

The load estimation of the second AP is performed as follows:

Pc

Total. c

In some embodiments of the present invention, the processor 803 is specifically configured to perform the following steps:

The load balancing factor is calculated by:

|ΑΡ|∑Α ² '

In some embodiments of the present invention, the processor 803 is further configured to: perform re-radio access to the UE initially associated with the first AP if the KPI is greater than or equal to the key performance indicator threshold Point association.

According to the foregoing embodiment, the AP evaluation module determines whether the AP needs to be added according to the user equipment information reported by the first AP, determines the location of the newly added AP when the AP needs to be added, and then the association module re-executes the UE initially associated with the first AP. The wireless access point is associated, and the beamforming module respectively generates beamforming for the second AP and the first AP, and then the load estimating module respectively pairs the second AP and the first AP. Performing load estimation, the KPI calculation module calculates a KPI according to the estimated load of the second AP and the load of the first AP, and finally the KPI determining module determines whether the KPI is greater than a preset key performance indicator threshold, where the KPI is greater than the key performance. In the case of the indicator threshold, the sending module sends a beamforming parameter to the second AP and the first AP respectively, so that the re-association of the dense UE can be completed when the service hotspot occurs, and the KPI performance requirement is met, and the network capacity is improved. Coverage performance, can be applied to coverage distance requirements in different directions and anisotropic channel conditions.

A person skilled in the art can understand that all or part of the steps of implementing the above embodiments can be completed by a program to instruct related hardware, and the program can be stored in a computer readable storage medium, and the above mentioned storage medium can be It is a read-only memory, a disk or a disc.

The radio frequency optimization method and the related device provided by the present invention are described in detail above. For those skilled in the art, according to the idea of the embodiment of the present invention, the specific implementation manner and the application range may be changed. Therefore, the content of the present specification should not be construed as limiting the invention.

Claims

Rights request

1. A radio frequency optimization method, characterized by including:

Receive user equipment information reported by the first wireless access point AP, where the user equipment information includes: the first AP periodically collects statistics on the service demand information, location information and idle channel detection CCA information of the initially associated user equipment UE, so The first AP is controlled and managed by the wireless controller AC; determine whether an AP needs to be added and the location of the added AP based on the user equipment information reported by the first AP;

If an AP needs to be added and the added AP is a second AP, re-associate the wireless access point for the UE that was initially associated with the first AP;

Based on the UE after re-associating the wireless access point, the second AP and the first

AP generates beamforming;

According to the signal-to-noise ratio and service requirements of the UE after re-associating the wireless access point, perform load estimation on the second AP, and perform load estimation on the first AP;

Calculate key performance indicators KPI based on the estimated load of the second AP and the load of the first AP;

Determine whether the KPI is greater than the preset key performance indicator threshold;

If the KPI is less than the key performance indicator threshold, beamforming parameters are delivered to the second AP and the first AP respectively.

2. The method according to claim 1, wherein re-associating the wireless access point for the UE that was initially associated with the first AP includes:

Calculate the path loss value from the UE initially associated to the first AP to the second AP respectively; Determine whether the path loss value from each UE to the second AP is greater than the path loss threshold; For the path loss value that is less than the path loss value, For UEs whose path loss value is greater than or equal to the path loss threshold, associate them with the second AP; for UEs whose path loss value is greater than or equal to the path loss threshold, associate them with the first AP.

3. The method according to claim 1 or 2, characterized in that, based on the UE after re-associating the wireless access point, generating beamforming for the second AP and the first AP respectively includes: :

Generate beamforming for the second AP based on the UE associated to the second AP after re-associating the wireless access point; Calculate the total antenna transmission power of the second AP according to the beamforming generated for the second AP;

Determine whether the total antenna transmission power of the second AP meets the power restriction condition;

If the total antenna transmission power of the second AP does not meet the power restriction condition, re-associate the wireless access point for the UE initially associated with the first AP;

If the total antenna transmission power of the second AP meets the power restriction condition, based on the UE associated to the first AP after re-associating the wireless access point, beamforming is generated for the first AP; according to Beamforming generated by the first AP, calculating the total antenna transmission power of the first AP;

Determine whether the total antenna transmission power of the first AP meets the power restriction condition;

If the total antenna transmission power of the first AP does not meet the power restriction condition, the wireless access point association is performed again for the UE initially associated with the first AP.

4. The method according to claim 3, wherein calculating the total antenna transmission power of the second AP based on the beamforming generated for the second AP includes:

Determine the desired direction pattern of the second AP according to the location information of the UE initially associated with the first AP;

Calculate the sampling values of the expected pattern of the second AP in each sampling direction;

Calculate the antenna array element weighting coefficient of the second AP based on the sampling values of the expected pattern of the second AP in each sampling direction;

Calculate the total antenna transmission power of the second AP according to the antenna element weighting coefficient.

5. The method according to claim 4, wherein the calculating the sampling values of the expected pattern of the second AP in each sampling direction includes:

Find + 1) sampling directions in the expected pattern of the second AP according to the number of transmitting antennas of the second AP, where the number of transmitting antennas is ^;

Calculate the angle of each sampling direction relative to the main direction as follows:

n

θ = COS -if— ^ηλ

, — ,

htK

Where, said is the angle of the nth sampling direction relative to the main direction, said n = -K / 2, . .. , K / 2, said is wavelength, said is the number of transmitting antennas, said is antenna Array element spacing;

Obtain the coverage of each sector divided by each sampling direction in the desired direction pattern; Obtain sampling values in each sampling direction according to the coverage range of each sector; Calculate the antenna array of the second AP based on the sampling values in each sampling direction of the expected pattern of the second AP Element weighting coefficients, including:

Calculate the antenna element weighting coefficient of the second AP in the following way:

Wherein, the ;) is the weighting coefficient of the Zth antenna element of the second AP, the Zth antenna element is the position relative to the midpoint of all the antenna elements of the second AP, and _{the ZZ} = -^1^, the t = l, 2, ..., , _{the β} „ is the sampling value in the <<th sampling direction, the said is the number of transmitting antennas, the said is the <<th sampling direction relative to The angle of the main direction, said is the wavelength;

The calculation of the total antenna transmission power of the second AP based on the antenna element weighting coefficient includes:

Calculate the total antenna transmission power P of the second AP in the following way:

W,l,

Wherein, / is the weighting coefficient of the zth antenna element of the second AP, and / is the number of transmitting antennas.

6. The method according to claim 1, characterized in that, based on the signal-to-noise ratio and service requirements of the UE after re-associating the wireless access point, performing load estimation on the second AP includes: as follows: The method calculates the rate that can be obtained by the UE associated to the second AP after re-associating the wireless access point:

Ri = D _c ^sch ^ ^W W log ₂ (1 + eta SINR _t ),

Wherein, said is the rate available to the th UE, said is the scheduler coefficient of the second AP, said 7 ^fiW is the channel bandwidth coefficient of the second AP, and said W is the second AP The channel bandwidth, the ΔV is the signal-to-noise ratio coefficient, and the ΔV is the signal-to-noise ratio of the UE; Calculate as follows to re-associate the wireless access point and then associate to the second AP The transmission duration required by the UE:

Λ .

Wherein, the 7 is the transmission duration required by the i-th UE, and the A is the transmission duration required by the i-th UE. The rate requirement in the service requirement, the ¾ is the rate available to the UE-th, the w is the set of neighboring cells of cell c included in the second AP, and is equal to 0 or 1, when 6^ = 0 is the increase in load brought by the interference domain, when = 1 is the increase in load brought by the transmission domain, the ^ is equal to 0 or 1, when the second AP channel is the same,

Γ is the transmission duration required by the UE associated with APd;

Calculate the total transmission time required for all UEs associated to the second AP after re-associating the wireless access point 7 in the following manner:

D

T _c = ∑ ∑ min ∑a _i ,\

R wherein, the is the second AP, the A is the rate requirement in the service requirements of the th UE, and the · is the rate available to the th UE;

The total transmission time r _toto available for the second AP is calculated as follows:

Wherein, (^ is the nominal rate of the second AP, and (^ is the media intervention control rate factor of the second AP, and _RflV is the average obtainable rate of the second AP, Said, is the number of users associated with the second AP;

Perform load estimation on the second AP in the following way:

Wherein, said is the load of the second AP, said 7 is the total transmission duration required by all UEs of the second AP, and said _rtoto ^ is the total transmission duration available for the second AP.

7. The method according to claim 1 or 6, wherein the KPI includes a load balancing coefficient, and the key performance indicator is calculated based on the estimated load of the second AP and the load of the first AP. KPIs, including:

Calculate the load balancing coefficient by:

Wherein, said is the load balancing coefficient, said is said second AP or said first AP The load, the |AP| refers to the total number of APs controlled and managed by the AC.

8. The method according to any one of claims 1 to 6, characterized in that the method further includes:

If the KPI is greater than or equal to the key performance indicator threshold, re-associate the wireless access point for the UE initially associated with the first AP.

9. A radio frequency optimization device, characterized by including:

A receiving module, configured to receive user equipment information reported by the first wireless access point AP, where the user equipment information includes: the first AP periodically collects statistics on the service demand information, location information and idle channels of the initially associated user equipment UE. Detecting CCA information, the first AP is controlled and managed by the wireless controller AC;

The AP evaluation module is used to determine whether it is necessary to add an AP and the location of the added AP based on the user equipment information reported by the first AP;

The association module is used to re-associate the wireless access point for the UE that is initially associated with the first AP if an AP needs to be added and the added AP is a second AP;

A beamforming module, configured to generate beamforming for the second AP and the first AP respectively based on the UE after re-associating the wireless access point;

A load estimation module, configured to perform load estimation on the second AP according to the signal-to-noise ratio and service requirements of the UE after re-associating the wireless access point, and perform load estimation on the first AP;

A KPI calculation module, configured to calculate the key performance indicator KPI based on the estimated load of the second AP and the load of the first AP;

A KPI judgment module, used to judge whether the KPI is greater than a preset key performance indicator threshold; a sending module, used to send signals to the second AP and the first AP if the KPI is less than the key performance indicator threshold, respectively. Send beamforming parameters.

10. The device according to claim 9, characterized in that the association module includes: a path loss calculation sub-module, configured to respectively calculate paths from the UE initially associated to the first AP to the second AP. loss value;

The path loss judgment sub-module is used to judge whether the path loss value from each UE to the second AP is greater than the path loss threshold;

A first association submodule, configured to associate a UE with a path loss value less than the path loss threshold to the second AP; The second association submodule is configured to associate a UE with a path loss value greater than or equal to the path loss threshold to the first AP.

11. The device according to claim 9 or 10, characterized in that the beam forming module includes:

The second beamforming submodule is configured to generate beamforming for the second AP based on the UE associated with the second AP after re-associating the wireless access point;

A power calculation submodule, configured to calculate the total antenna transmission power of the second AP based on the beamforming generated for the second AP;

The power judgment submodule is used to judge whether the total antenna transmission power of the second AP meets the power restriction condition;

Trigger sub-module, used to execute the association module again if the total antenna transmission power of the second AP does not meet the power limit condition;

The first beamforming submodule is used to, if the total antenna transmission power of the second AP meets the power restriction condition, the UE associated to the first AP after re-associating the wireless access point is the first AP generates beamforming;

The power calculation sub-module is also used to calculate the total antenna transmission power of the first AP based on the beamforming generated for the first AP;

The power judgment sub-module is used to judge whether the total antenna transmission power of the first AP meets the power limit condition;

The triggering sub-module is also used to execute the association module again if the total antenna transmission power of the first AP does not meet the power limit condition.

12. The device according to claim 11, characterized in that the power calculation sub-module includes:

A desired direction pattern determination unit, configured to determine the desired direction pattern of the second AP based on the location information of the UE initially associated with the first AP;

A sampling value calculation unit, used to calculate the sampling value of the expected pattern of the second AP in each sampling direction;

A coefficient calculation unit configured to calculate the antenna array element weighting coefficient of the second AP based on the sampling values of the expected pattern of the second AP in each sampling direction;

A power calculation unit, configured to calculate the antenna of the second AP according to the weighting coefficient of the antenna element. Total transmit power.

13. The device according to claim 12, characterized in that the sampling value calculation unit includes:

The sampling direction acquisition subunit is used to find (+ 1) sampling directions in the expected pattern of the second AP according to the number of transmitting antennas of the second AP, where the number of transmitting antennas is 0; angle Calculation subunit, used to calculate the angle of each sampling direction relative to the main direction in the following way:

Where, said is the angle of the n-th sampling direction relative to the main direction, said n = -K/2,...,K/2, said is wavelength, said is the number of transmitting antennas, said is antenna The inter-array element coverage acquisition subunit is used to acquire the coverage of each sector divided into each sampling direction in the desired pattern;

A sampling value calculation subunit, used to obtain sampling values in each sampling direction according to the coverage of each sector;

The coefficient calculation unit is specifically used to calculate the antenna array element weight of the second AP in the following manner

Wherein, the ;) is the weighting system of the Zth antenna element of the second AP, the position of the Zth antenna element relative to the midpoint of all array elements of the second AP, and the ₌

Said t = l,2,..., , said _β „ is the sampling value in the <<th sampling direction, said is the number of transmitting antennas, said is the angle of the <<th sampling direction relative to the main direction, so A is the wavelength;

The power calculation unit is specifically configured to calculate the total antenna transmission power of the second AP in the following manner

14. The device according to claim 9, characterized in that the load estimation module includes: The rate calculation submodule is used to calculate the rate that can be obtained by the UE associated with the second AP after re-associating the wireless access point in the following manner:

Ri = D _c ^{sch BW} W log ₂ (1 + _n ^SINR SINRi ) '

Wherein, said is the rate available to the i-th UE, said is the scheduler coefficient of the second AP, said 7 ^fiW is the channel bandwidth coefficient of the second AP, and said W is the second The channel bandwidth of the AP, the 7 is the signal-to-noise ratio coefficient, and the 7 is the signal-to-noise ratio of the UE; the transmission duration calculation submodule is used to calculate the association after re-association of the wireless access point in the following way The transmission duration required by the UE to the second AP:

^T i = ^-+ ∑ ^a i,d ^X cd ^T d ,

d

Wherein, the 7; is the transmission duration required by the i-th UE, the A is the rate requirement in the service requirements of the i-th UE, the a is the rate available to the i-th UE, and w is the set of neighboring cells of cell c included in the second AP, and is equal to 0 or 1. When 6^=0, it is the increase in load brought by the interference domain, and when ^=1, it is the increase in load brought by the transmission domain, The ^ is equal to 0 or 1. When the working channels of the second AP and AP^ are different, c^=0. When the working channels of the second AP and AP^ are the same, _^=1, and the AP^ is the AP to which the neighbor cell of the second AP belongs, T = ∑

7; 'The transmission duration required by the UE associated with APd;

The required total transmission duration calculation submodule is used to calculate the total transmission duration required for all UEs that are associated to the second AP after re-association with the wireless access point in the following manner:

T _c = ∑ - + ∑ min ∑a _i ,\

R-wherein, the is the second AP, the A is the rate requirement in the service requirements of the th UE, and the is the rate available to the th UE;

The total available transmission duration calculation submodule is used to calculate the total available transmission duration r _{toi of the second AP in the following manner:}

τ where, the (^ is the nominal rate of the second AP, the; ^ is the protocol efficiency factor of the media intervention control MAC layer of the second AP, and the and ^ are the The average obtainable rate, the R _flV g, _c =^ ∑ R,., is the number of users associated with the second AP; The load calculation submodule is used to estimate the load of the second AP in the following manner:

Wherein, is the load of the second AP, is the total transmission duration required by all UEs of the second AP, and is _the total transmission duration available for the second AP.

15. The device according to claim 9 or 14, characterized in that the KPI includes a load balancing coefficient, and the KPI calculation module is specifically used to calculate the load balancing coefficient in the following manner:

[∑4 Where, the above is the load balancing coefficient, the A is the load of the second AP or the first AP, and the |AP| refers to the total number of APs controlled and managed by the AC .

16. The device according to any one of claims 9 to 14, characterized in that the wireless radio frequency optimization device further includes:

A trigger module, used to execute the correlation module again if the KPI is greater than or equal to the key performance indicator threshold.

17. A radio frequency optimization device, characterized in that it includes: an input device, an output device, a memory and a processor;

Wherein, the processor performs the following steps:

Receive user equipment information reported by the first wireless access point AP through the input device. The user equipment information includes: the first AP periodically collects statistics on the service demand information, location information and idle channel detection CCA of the initially associated user equipment UE. Information, the first AP is controlled and managed by the wireless controller AC;

Determine whether an AP needs to be added and the location of the added AP based on the user equipment information reported by the first AP;

AP generates beamforming;

Perform load estimation on the second AP and load estimation on the first AP according to the signal-to-noise ratio and service requirements of the UE after re-associating the wireless access point; Calculate key performance indicators KPI according to the estimated load of the second AP and the load of the first AP;

If the KPI is less than the key performance indicator threshold, beamforming parameters are delivered to the second AP and the first AP respectively through the output device.

18. The device according to claim 17, wherein the processor is specifically configured to perform the following steps:

Calculate the path loss value from the UE initially associated to the first AP to the second AP respectively; Determine whether the path loss value from each UE to the second AP is greater than the path loss threshold; For the path loss value that is less than the path loss value, For UEs with a path loss value greater than or equal to the path loss threshold, associate them with the second AP. For UEs with a path loss value greater than or equal to the path loss threshold, associate them with the first AP.

AP.

19. The device according to claim 17 or 18, characterized in that the processor is specifically configured to perform the following steps:

Based on the UE associated to the second AP after re-association with the wireless access point, the second

AP generates beamforming;

Calculate the total antenna transmission power of the second AP according to the beamforming generated for the second AP;

If the total antenna transmission power of the second AP meets the power restriction condition, based on the UE associated to the first AP after re-associating the wireless access point, beamforming is generated for the first AP; According to: Beamforming generated by the first AP, calculating the total antenna transmission power of the first AP;

20. The device according to claim 19, wherein the processor is specifically configured to perform the following steps: Determine the desired direction pattern of the second AP based on the location information of the UE initially associated with the first AP;

21. The device according to claim 20, wherein the processor is specifically configured to perform the following steps:

Find + 1) sampling directions in the expected pattern of the second AP according to the number of transmitting antennas of the second AP, where the number of transmitting antennas is ;

θ n = cos -if ^ηλ

,——,

htK

Obtain the coverage of each sector divided by each sampling direction in the desired pattern; obtain the sampling value in each sampling direction according to the coverage of each sector; calculate the second second sector in the following manner Antenna element weighting coefficient of ΑP:

τ , , 1 ^{COS 0} n

Wherein, the /;) is the weighting coefficient of the Zth antenna element of the second AP, the position of the Zth antenna element relative to the midpoint of all the antenna elements of the second AP, and the 4 =^-^1^ , so

2 J Let t = l,2,..., , where _β „ is the sampling value in the <<th sampling direction, where is the number of transmitting antennas, and where is the angle of the <<th sampling direction relative to the main direction , said is the wavelength;

Calculate the total antenna transmission power P of the second AP by:

22. The device according to claim 17, characterized in that the processor is specifically configured to execute Follow these steps:

The rate that can be obtained by the UE associated with the second AP after re-associating the wireless access point is calculated as follows:

Ri = D _c ^{sch BW} W log ₂ (1 + _n ^SINR SINRi ) '

Wherein, said is the rate available to the i-th UE, said is the scheduler coefficient of the second AP, said 7 ^fiW is the channel bandwidth coefficient of the second AP, and said W is the second The channel bandwidth of the AP, the 7 is the signal-to-noise ratio coefficient, and the 7 is the signal-to-noise ratio of the UE; Calculate the UE associated to the second AP after re-associating the wireless access point in the following way Required transfer time:

^T i = ^-+ ∑ ^a i,d ^X cd ^T d ,

d

Wherein, the 7 is the transmission duration required by the i-th UE, the A is the rate requirement in the service requirements of the i-th UE, the a is the rate available to the i-th UE, and the w is the rate required by the i-th UE. The set of neighboring cells of cell c included in the second AP is equal to 0 or 1. When 6^=0, it is an increase in load brought by the interference domain. When ^=1, it is an increase in load brought by the transmission domain. ^ is equal to 0 or 1, when the second AP channel is the same,

Γ is the transmission duration required by the UE associated with APd;

T _c = ∑ - + ∑ min ∑a _i ,\

R-wherein, the is the second AP, the A is the rate requirement in the service requirements of the th UE, and the · is the rate available to the th UE;

Calculate the total transmission time _rtoto available for the second AP using the following formula:

Wherein, the (^ is the nominal rate of the second AP, the ; ^ is the protocol efficiency factor of the media intervention control MAC layer of the second AP, and the RflV _£ ^ is the second AP The average obtainable rate, the ^=^∑ μρ is the number of users associated with the second AP;

ieAP _c Load estimation is performed on the second AP in the following manner:

23. The device according to claim 17 or 22, characterized in that the processor is specifically configured to perform the following steps:

All KPIs include load balancing coefficients, which are calculated as follows:

_

,

Wherein, the is the load balancing coefficient, the ^ is the load of the second AP or the first AP, and the |AP| refers to the total number of APs controlled and managed by the AC.

24. The device according to claims 17 to 22, characterized in that the processor is specifically configured to perform the following steps:

+