CN106131940B

CN106131940B - Method and device for adjusting transmitting power

Info

Publication number: CN106131940B
Application number: CN201610538212.4A
Authority: CN
Inventors: 吴宝平
Original assignee: Hangzhou H3C Technologies Co Ltd
Current assignee: Hangzhou H3C Technologies Co Ltd
Priority date: 2016-07-05
Filing date: 2016-07-05
Publication date: 2020-12-25
Anticipated expiration: 2036-07-05
Also published as: CN106131940A

Abstract

The embodiment of the invention discloses a method and a device for adjusting transmission power.A first AP determines at least one second AP existing in a first neighbor list of the first AP; respectively inquiring whether a first AP exists in a second neighbor list of the at least one second AP stored in the wireless controller AC; determining a second AP corresponding to a second neighbor list of the first AP as a valid neighbor AP of the first AP, wherein the query result indicates that the first AP exists; and adjusting the transmission power of the AP according to the effective neighbor AP. Therefore, the number of neighbor APs which need to be traversed when the AP adjusts the transmitting power can be reduced by screening the effective neighbor APs according to which the transmitting power is adjusted for the AP, so that the condition that the calculated amount is overlarge due to the fact that the AP traverses all the neighbor APs on the AC is avoided; in addition, the effective neighbor AP of the first AP is the symmetric neighbor of the first AP, and the application of the scheme can ensure the symmetry of the neighbor AP and avoid the problem of asymmetric neighbor adjustment.

Description

Method and device for adjusting transmitting power

Technical Field

The present invention relates to the field of wireless network technologies, and in particular, to a method and an apparatus for adjusting transmit power.

Background

With the continuous development of wireless network technology, TPC (Transmit Power Control) technology has been widely used. The conventional rf power control method only statically sets the transmission power of an AP (Access Point) to a maximum value, and simply pursues a signal coverage, but the excessive power may cause unnecessary interference to other wireless devices. And the TPC technology can be used for selecting the optimal power which can not only consider the signal coverage range of each AP, but also meet the use requirement.

By applying the TPC technology, the transmitting power of the AP can be dynamically adjusted according to the real-time wireless environment condition. Specifically, when the AP detects that an additional neighbor AP or a neighbor AP fails or is offline, the AP may traverse a neighbor list of all online APs on an AC (Access Controller), determine neighbor APs of the AP, sort the determined neighbor APs according to the magnitude of the signal strength of the AP detected by the neighbor APs, set a neighbor coefficient for each neighbor AP according to the result of the sorting, and adjust its own transmission power according to the result of comparing the signal strength of the AP detected by the neighbor AP corresponding to the designated neighbor coefficient (hereinafter, referred to as the designated neighbor AP) with a preset threshold:

if the number of neighbor APs of the AP reaches the set value, the AP will adjust the transmission power according to the following principle: if the appointed neighbor AP detects that the signal intensity of the AP is larger than the maximum value of a preset threshold interval, the AP reduces the self transmitting power; if the appointed neighbor AP detects that the signal intensity of the AP is smaller than the minimum value of the preset threshold interval, the AP can increase the self transmitting power;

if the number of neighbor APs of the AP does not reach the set value, the AP adjusts the self transmitting power to the maximum value.

However, when the TPC technology is applied to perform power adjustment, the AP may traverse the neighbor lists of all online APs on the AC, and the calculation amount is too large, which affects the performance of the device.

Disclosure of Invention

The embodiment of the invention aims to provide a method and a device for adjusting transmission power, which avoid the condition of overlarge calculation amount caused by traversing all neighbor APs on an AC when an AP adjusts the transmission power.

To achieve the above object, an embodiment of the present invention discloses a method for adjusting transmit power, which is applied to a first wireless access point AP, and includes:

determining at least one second AP present in a first neighbor list of the first AP;

respectively inquiring whether the first AP exists in a second neighbor list of the at least one second AP stored in the wireless controller AC;

determining a second AP corresponding to a second neighbor list of the first AP as a valid neighbor AP of the first AP according to the query result;

judging whether the number of effective neighbor APs of the first AP is smaller than a preset threshold value or not, and if so, increasing the transmitting power;

if not, determining a target effective neighbor AP from the effective neighbor APs, and determining the signal strength of the first AP detected by the target effective neighbor AP;

judging whether the signal intensity of the first AP detected by the target effective neighbor AP is in a preset interval or not;

and when the judgment result is negative, adjusting the transmitting power.

In order to achieve the above object, an embodiment of the present invention further discloses a transmit power adjustment apparatus, which is applied to a first wireless access point AP, and includes:

a first determining module, configured to determine at least one second AP existing in a first neighbor list of the first AP;

the query module is used for querying whether the first AP exists in a second neighbor list of the at least one second AP stored in the wireless controller AC;

a second determining module, configured to determine, as a valid neighbor AP of the first AP, a second AP corresponding to a second neighbor list in which the query result indicates that the first AP exists;

the first judgment module is used for judging whether the number of the effective neighbor APs of the first AP is smaller than a preset threshold value or not;

the increasing module is used for increasing the transmitting power when the judgment result of the first judging module is yes;

a third determining module, configured to determine a target valid neighbor AP from the valid neighbor APs when the first determining module determines that the target valid neighbor AP is not the valid neighbor AP,

a fourth determining module, configured to determine the signal strength of the first AP detected by the target valid neighbor AP;

the second judgment module is used for judging whether the signal intensity of the first AP detected by the target effective neighbor AP is in a preset interval or not;

and the adjusting module is used for adjusting the transmitting power when the judgment result of the second judging module is negative.

By applying the embodiment of the invention, the first AP determines at least one second AP existing in the first neighbor list of the first AP; respectively inquiring whether a first AP exists in a second neighbor list of the at least one second AP stored in the wireless controller AC; determining a second AP corresponding to a second neighbor list of the first AP as a valid neighbor AP of the first AP, wherein the query result indicates that the first AP exists; and then adjusting the transmission power of the AP according to the effective neighbor AP. Therefore, the number of neighbor APs which need to be traversed when the AP adjusts the transmitting power can be reduced by screening the effective neighbor APs according to which the transmitting power is adjusted for the AP, so that the condition that the calculated amount is overlarge due to the fact that the AP traverses all the neighbor APs on the AC is avoided; in addition, the effective neighbor AP of the first AP is the symmetric neighbor of the first AP, and the application of the scheme can ensure the symmetry of the neighbor AP and avoid the problem of asymmetric neighbor adjustment.

Of course, it is not necessary for any product or method of practicing the invention to achieve all of the above-described advantages at the same time.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic flowchart of a method for adjusting transmit power according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a transmit power adjustment apparatus according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In order to solve the problem of the prior art, an embodiment of the present invention provides a method and an apparatus for adjusting transmit power, which are applied to a first wireless access point AP, where the first AP is any AP managed by a wireless controller AC, that is, any AP may be used as the first AP to execute the method provided in the embodiment of the present invention.

First, a method for adjusting transmit power according to an embodiment of the present invention is described in detail below.

In the embodiment of the present invention, the triggering condition for the first AP to perform the transmission power adjustment (i.e. the triggering condition for the first AP to perform the method provided by the embodiment of the present invention) may include:

detecting an increase or decrease in neighbor APs; or, reaching a preset time; or, a preset time is reached and an increase or decrease of neighbor APs is detected.

It is understood that when the first AP detects an increase or decrease of the neighboring AP, the valid neighboring AP of the first AP may be changed, and the adjustment of the transmission power is related to the number of neighboring APs and the signal strength of the neighboring AP detecting the first AP, so that when the first AP detects an increase or decrease of the neighboring AP, the first AP may need to readjust the transmission power.

In another case, if a certain AP frequently goes up and down, so that the first AP always detects an increase or decrease of the neighboring AP, if the above trigger condition is applied, the first AP may frequently adjust the transmission power. Therefore, another trigger condition may be applied, that is, the transmission power adjustment method is performed every time a preset time is reached.

Of course, the above two trigger conditions may also be combined, that is, when the preset time is reached and the increase or decrease of the neighbor AP is detected, the transmit power adjustment method is executed.

When the above-mentioned trigger condition for adjusting the transmission power is satisfied, the first AP executes the method for adjusting the transmission power provided in the embodiment of the present invention.

As shown in fig. 1, a method for adjusting transmit power according to an embodiment of the present invention may include the following steps:

s101: determining at least one second AP present in a first neighbor list of the first AP.

The AC stores the neighbor list of all APs under the management of the AC. For example, when the AP1 detects the AP2, the AP1 reports the AP2 to the AC, and the AP2 exists in the neighbor list of the AP 1.

The first AP inquires a neighbor list of the AP from an AC (access controller) managing the first AP, and determines a second AP existing in the first neighbor list of the AP. Assume that querying the AC-stored neighbor list of the first AP includes: AP2, AP3, and AP 4. The second AP is an AP managed by the AC except the first AP, and the second AP determined here is a neighbor AP of the first AP. It is emphasized that "first" in "first AP" and "second" in "second AP" are merely used to distinguish the present AP from the corresponding neighbor AP in terms of name, and should not be construed in any limiting sense; similarly, the "first" in the "first neighbor list" and the "second" in the subsequent "second neighbor list" are only the neighbor lists that distinguish the own AP from the corresponding neighbor APs in terms of names, and should not be construed in any limiting sense.

In addition, the first neighbor list and the second neighbor list may be constructed in any manner in the prior art, and are not described herein again because they are not the invention points of the present invention.

S102: respectively inquiring whether the first AP exists in a second neighbor list of the at least one second AP stored in the wireless controller AC, and if so, executing S103.

And the first AP queries the second neighbor lists of the AP2, the AP3 and the AP4 from the first AP to the AC respectively, and judges whether the first AP exists in the second neighbor lists of the AP2, the AP3 and the AP 4. That is, it is determined whether AP2, AP3, and AP4 are symmetric neighbors with the first AP.

The symmetric neighbors mean that the AP1 and the AP2 are adjacent APs, the AP1 can detect the AP2 and report the AP2 to the AC, and therefore the AP2 exists in a neighbor list of the AP 1; at the same time, AP2 can also detect AP1 and report AP1 to the AC, so AP1 also exists in the neighbor list of AP 2. In this case, AP1 and AP2 are symmetric neighbors.

Asymmetric neighbors means that AP1 can detect AP2 and report AP2 to the AC, so AP2 is present in the neighbor list of AP1, but AP2 cannot detect AP1, so AP1 cannot be present in the neighbor list of AP 2. AP1 and AP2 are asymmetric neighbors (asymmetric neighbors).

For APs, when there are asymmetric neighbors, a situation where one AP decreases the transmit power and another AP increases the transmit power may occur in adjusting the transmit power. In practical application, when the AP is deployed, it is generally considered that the difference between the transmission powers of the APs is not large, so that the APs are uniformly deployed. If the situation that one AP reduces the transmission power and the other AP increases the transmission power occurs, the normal deployment of the APs is affected, and the situation that a signal in a partial area is too strong and a signal in the partial area is not available can be caused.

S103: and determining the second AP corresponding to the second neighbor list of the first AP as the effective neighbor AP of the first AP according to the query result.

Assume that the second neighbor list of AP2 includes: AP3 and AP 4; the second neighbor list of AP3 includes: AP1 and AP 4; the second neighbor list of AP4 includes: AP1 and AP 3. That is, the results of the queries in the second neighbor lists of AP3 and AP4 indicate the presence of the first AP, determining AP3 and AP4 as valid neighbor APs for the first AP. In a subsequent transmit power adjustment process, the first AP makes transmit power adjustments based on the active neighbor APs (AP3 and AP 4).

The first AP only adjusts the transmitting power according to the effective neighbor APs, so that the number of the neighbor APs required to be traversed by the first AP can be reduced, and the condition that the calculated amount is overlarge due to the fact that the AP traverses all the neighbor APs on the AC is avoided; in addition, the effective neighbor AP of the first AP is the symmetric neighbor of the first AP, and the application of the scheme can ensure the symmetry of the neighbor AP and avoid the problem of asymmetric neighbor adjustment.

Specifically, the process of the first AP adjusting the transmission power according to the valid neighbor AP is as follows:

s104: and judging whether the number of the effective neighbor APs of the first AP is smaller than a preset threshold value, if so, executing S105, and if not, executing S106.

S105: the transmit power is increased.

As will be appreciated by those skilled in the art, if the number of valid neighbor APs of the first AP is less than the preset threshold, i.e., the first AP detects fewer APs than expected, the first AP may need to increase the transmission power to enable more APs to detect the first AP's signal.

The specific increase amount of the transmission power can be determined according to the prior art, and is not limited herein.

S106: determining a target valid neighbor AP from the valid neighbor APs.

The target valid neighbor AP may be all or a portion of the valid neighbor APs of the first AP.

As an embodiment of the present invention, determining a target valid neighbor AP from the valid neighbor APs may include:

receiving a selection instruction sent by a user;

and screening the effective neighbor APs of the first AP to obtain a target effective neighbor AP according to the selection instruction.

In this embodiment, the target valid neighbor may be determined according to a user's selection.

Assuming that the valid neighbors of the first AP include AP3 and AP4, and the user determines that the first AP needs to adjust its own transmission power according to AP3 according to actual conditions, the first AP receives an instruction sent by the user to select AP3 as a target valid neighbor, and determines AP3 as a target valid neighbor AP.

As another embodiment of the present invention, determining a target valid neighbor AP from the valid neighbor APs may include:

sequencing the effective neighbor APs according to the signal intensity of the first AP detected by the effective neighbor APs; and determining the effective neighbor AP positioned in the preset rank as the target effective neighbor AP.

Specifically, the valid neighbor APs may be sorted according to the signal strength of the first AP detected by the valid neighbor APs, and the neighbor coefficient of each valid neighbor AP is set according to the sorting result; and then determining the effective neighbor AP corresponding to the preset neighbor coefficient as the target effective neighbor AP.

In this embodiment, assuming that the valid neighbors AP3 and AP4 of the first AP detect that the signal strength of the first AP is-50 dBm and-40 dBm, respectively, AP3 and AP4 are ranked, AP4 is ranked first and AP3 is ranked later, and the neighbor coefficient of AP4 is set to be 1 and the neighbor coefficient of AP3 is set to be 2.

If the preset rank is 2, determining the suburban neighbor AP3 corresponding to the neighbor coefficient 2 as the target valid neighbor AP.

S107: determining a signal strength of the first AP detected by the target valid neighbor AP.

S108: and judging whether the signal strength of the first AP detected by the target effective neighbor AP is in a preset interval, if not, executing S109.

If all valid neighbor APs of the first AP are determined to be target valid neighbor APs, S108 is: and judging whether the signal intensity of the first AP detected by all effective neighbor APs of the first AP is within a preset interval, if not, executing S109.

If the embodiment is applied, the AP3 is determined to be the target valid neighbor AP, and it is determined whether the signal strengths of the APs detected by the AP3 are all within the preset interval.

If the signal strength of the first AP detected by the target valid neighbor AP is in the preset interval, the first AP does not adjust the transmission power, and if not, the first AP performs S109.

S109: the transmit power is adjusted.

Specifically, the adjusting the transmission power may include:

when the detected signal intensity of the first AP is greater than the maximum value of the preset interval, reducing the transmitting power; and when the detected signal strength of the first AP is smaller than the minimum value of the preset interval, increasing the transmission power.

It should be noted that the specific reduction amount and the specific increase amount of the transmission power can be determined according to the prior art, and are not limited herein.

With the embodiment of the present invention shown in fig. 2, a first AP determines at least one second AP existing in a first neighbor list of itself; respectively inquiring whether a first AP exists in a second neighbor list of the at least one second AP stored in the wireless controller AC; determining a second AP corresponding to a second neighbor list of the first AP as a valid neighbor AP of the first AP, wherein the query result indicates that the first AP exists; and then adjusting the transmission power of the AP according to the effective neighbor AP. Therefore, the number of neighbor APs which need to be traversed when the AP adjusts the transmitting power can be reduced by screening the effective neighbor APs according to which the transmitting power is adjusted for the AP, so that the condition that the calculated amount is overlarge due to the fact that the AP traverses all the neighbor APs on the AC is avoided; in addition, the effective neighbor AP of the first AP is the symmetric neighbor of the first AP, and the application of the scheme can ensure the symmetry of the neighbor AP and avoid the problem of asymmetric neighbor adjustment.

For example, the following illustrates how embodiments provided by the present invention solve the problem of excessive computation and asymmetric neighbor adjustment caused by traversing the AC when the AP performs transmission power adjustment.

Assuming that AP1 can detect AP3, AP2 can detect AP1 and AP3, and AP3 can detect AP2 and AP3, the following table:

results of AP1 detection:

detecting AP	Detected AP	Signal strength SignalStrength
			AP1	AP3	-61
AP1	Null	Null

Results of AP2 detection:

detecting AP	Detected AP	Signal strength SignalStrength
			AP2	AP1	-51
AP2	AP3	-62

Results of AP3 detection:

detecting AP	Neighbor list (detected AP)	Signal strength SignalStrength
			AP3	AP1	-63
AP3	AP2	-54

As can be seen from the above table, for AP1, AP3 is its valid neighbor AP; for AP2, AP3 is its valid neighbor AP; for AP3, AP1 and AP2 are their valid neighbor APs.

Adjustment process of AP 1:

the first step is as follows: determining valid neighbor APs: AP 3.

Assuming that the preset threshold is 1 and the number of valid neighbor APs of the AP is not less than 1, the subsequent steps are continuously executed.

The second step is that: sequencing the effective neighbor APs according to the signal intensity of the AP detected by the effective neighbor APs, and setting the neighbor coefficient of each effective neighbor AP according to the sequencing result: in this example, with only one valid neighbor AP, AP3 detects that the signal strength of the AP is-63 dBm and the neighbor coefficient of AP3 is 1.

The third step: determining the effective neighbor AP with the neighbor coefficient of 1 as a target effective neighbor AP, and judging whether the signal strength of the AP detected by the target effective neighbor AP (AP3) is within a preset interval: assuming the predetermined interval is (-74dBm, -83dBm), the AP3 detects that the signal strength of the AP is-63 dBm greater than the maximum value of the predetermined interval, and therefore, the reduction of the transmission power needs to be completed.

As an embodiment of the present invention, when the AP1 reduces the transmission power, the signal strength detected by the AP3 at the AP1 may be compared with the preset interval each time the signal strength is reduced by a preset value, for example, by 3dBm each time the signal strength is reduced by one time, until the detected signal strength is within the preset interval, and the AP1 does not reduce the transmission power any more. Of course, if the AP3 detects that the signal strength of the AP1 is always greater than the maximum value of the preset interval, the transmit power of the AP1 is reduced to its configured minimum value.

Adjustment process of AP 2:

the first step is as follows: determining valid neighbor APs: AP 3.

The second step is that: sequencing the effective neighbor APs according to the signal intensity of the AP detected by the effective neighbor APs, and setting the neighbor coefficient of each effective neighbor AP according to the sequencing result: in this example, with only one valid neighbor AP, AP3 detects that the signal strength of the AP is-54 dBm and the neighbor coefficient of AP3 is 1.

The third step: determining the effective neighbor AP with the neighbor coefficient of 1 as a target effective neighbor AP, and judging whether the signal strength of the AP detected by the target effective neighbor AP (AP3) is within a preset interval: assuming the preset interval is (-74dBm, -83dBm), the AP3 detects that the signal strength of the AP is-54 dBm greater than the maximum value of the preset interval, and therefore, the reduction of the transmission power needs to be completed.

Adjustment process of AP 3:

the first step is as follows: determining valid neighbor APs: AP1 and AP 2.

The second step is that: sequencing the effective neighbor APs according to the signal intensity of the AP detected by the effective neighbor APs, and setting the neighbor coefficient of each effective neighbor AP according to the sequencing result: in this example, the AP1 detects that the signal strength of the AP is-61 dBm, and the neighbor coefficient of the AP1 is 1; the AP2 detects that the signal strength of the AP is-62 dBm, and the neighbor coefficient of the AP2 is 2.

The third step: determining the effective neighbor AP with the neighbor coefficient of 2 as a target effective neighbor AP, and judging whether the signal strength of the AP detected by the target effective neighbor AP (AP2) is within a preset interval: assuming the preset interval is (-74dBm, -83dBm), the AP2 detects that the signal strength of the AP is-62 dBm greater than the maximum value of the preset interval, and therefore, the reduction of the transmission power needs to be completed.

Correspondingly, in the existing TCP implementation, the adjustment process of each AP is as follows:

adjustment process of AP 1:

the first step is as follows: the AP1 traverses the neighbor list of all online APs on the AC, queries that AP2 and AP3 detect AP1, and determines AP2 and AP3 as neighbor APs, as shown in the following table:

signal strength SignalStrength	Detecting AP	Detected AP
			-51	AP2	AP1
-63	AP3	AP1

The second step is that: sequencing the neighbor APs according to the signal intensity of the neighbor AP detected by the neighbor AP, and setting the neighbor coefficient of each neighbor AP according to the sequencing result:

as can be seen from the above table, the AP2 detects that the signal strength of the AP is-51 dBm, the neighbor coefficient of the AP2 is 1, the AP3 detects that the signal strength of the AP is-63 dBm, and the neighbor coefficient of the AP3 is 2.

The third step: determining the effective neighbor AP with the neighbor coefficient of 2 as a target effective neighbor AP, and judging whether the signal strength of the AP detected by the target effective neighbor AP (AP3) is within a preset interval: assuming the predetermined interval is (-74dBm, -83dBm), the AP3 detects that the signal strength of the AP is-63 dBm greater than the maximum value of the predetermined interval, and therefore, the reduction of the transmission power needs to be completed.

Adjustment process of AP 2:

the first step is as follows: the AP2 traverses the neighbor list of all online APs on the AC, queries that AP3 detects AP2 and determines AP3 as a neighbor AP, as shown in the following table:

signal strength SignalStrength	Detecting AP	Detected AP
			-54	AP3	AP2

as can be seen from the above table, the AP2 only queries one neighbor AP, and the neighbor coefficient of the AP3 is 1.

The third step: determining the effective neighbor AP with the neighbor coefficient of 1 as a target effective neighbor AP, and judging whether the signal strength of the AP detected by the target effective neighbor AP (AP3) is within a preset interval: assuming the preset interval is (-74dBm, -83dBm), the AP3 detects that the signal strength of the AP is-54 Bm greater than the maximum value of the preset interval, and therefore, it is necessary to complete the reduction of the transmission power.

Adjustment process of AP 3:

the first step is as follows: the AP3 traverses the neighbor list of all online APs on the AC, queries that AP2 and AP3 detect AP1, and determines AP2 and AP3 as neighbor APs, as shown in the following table:

signal strength SignalStrength	Detecting AP	Detected AP
			-61	AP1	AP3
-62	AP2	AP3

as can be seen from the above table, the AP1 detects that the signal strength of the AP is-61 dBm, the neighbor coefficient of the AP1 is 1, the AP2 detects that the signal strength of the AP is-62 dBm, and the neighbor coefficient of the AP2 is 2.

Therefore, the difference between the AP adjustment process provided by the embodiment of the present invention and the AP adjustment process in the existing TCP implementation is as follows:

in the first step, the neighbor APs are determined: the existing TCP implementation method for determining the neighbor AP is as follows: traverse the neighbor list of all online APs on the AC. Assuming that the AC manages 1000 APs, for AP1, AP2, and AP3, the neighbor list of the remaining 999 APs needs to be queried to determine if any of the 999 APs detects the AP. In the embodiment of the present invention, the second AP existing in the neighbor list of the AP is determined, and the neighbor list of the second AP is only queried to determine whether the second AP detects itself: for AP1, only the neighbor list of AP3 needs to be queried, for AP2, only the neighbor lists of AP1 and AP3 need to be queried, and for AP3, only the neighbor lists of AP1 and AP2 need to be queried.

Therefore, by applying the scheme of the prior art, the neighbor list needs to be queried 999 times by 3 times, while by applying the scheme of the invention, only the neighbor list needs to be queried 5 times, and the query quantity is greatly reduced.

In the second step, the neighbor APs are sequenced: in the existing TCP implementation, all the neighbor APs queried in the previous step need to be sorted, which may include asymmetric neighbors. In the embodiment of the present invention, only the screened valid neighbor APs are sorted, and the asymmetric neighbors are not included.

Therefore, in the ordering process, the calculation amount of the existing TCP implementation is larger than that of the embodiment of the invention.

In the third step, the transmitting power is adjusted according to the determined target neighbor AP: in the existing TCP implementation, the determined target neighbor AP may be an asymmetric neighbor of the AP, which may cause an asymmetric neighbor adjustment problem. In the embodiment of the invention, the determined target neighbor AP is a symmetric neighbor definitely, and the problem of asymmetric neighbor adjustment cannot occur.

Therefore, the embodiment of the invention avoids the problem of asymmetric neighbor adjustment.

For convenience of description, the neighbor coefficient of the target neighbor AP is 1, and the preset threshold value for the number of neighbor APs is 1.

Assume the result of AP1 detection:

detecting AP	Detected AP	Signal strength
			AP1	Null	Null

Results of AP2 detection:

detecting AP	Detected neighbor)	Signal strength
			AP2	AP1	-51

That is, the AP2 can detect the AP1, and the AP2 reports the AP1 to the AC, so the AP1 exists in the neighbor list of the AP2, but the AP1 cannot detect the AP2, so the AP2 cannot appear in the neighbor list of the AP 1.

Adjustment process of AP 1:

the first step is as follows: the AP1 traverses the neighbor list of all online APs on the AC, queries that AP2 detects AP1 and determines AP1 as a neighbor AP.

Signal strength	Detecting AP	Detected AP
			-51	AP2	AP1

as can be seen from the above table, the AP1 only queries one neighbor AP, and the neighbor coefficient of the AP2 is 1.

Adjustment process of AP 2:

the first step is as follows: the AP2 traverses the neighbor list of all online APs on the AC. No AP is detected 2.

Signal strength	Detecting AP	Detected AP
			Null	Null	AP2
XX	XX	AP2

as can be seen from the above table, AP2 has no neighbor APs.

The third step: the number 0 of neighbor APs of the AP2 is less than the preset threshold 1, and therefore the AP2 increases the transmission power.

That is, the AP1 may decrease its own transmit power and the AP2 may increase its own transmit power. However, in practical applications, when the AP is deployed, it is generally considered that the difference between the transmission powers of the APs is not large, so that the APs are uniformly deployed. If the situation that one AP reduces the transmission power and the other AP increases the transmission power occurs, the normal deployment of the APs is affected, and the situation that a signal in a partial area is too strong and a signal in the partial area is not available can be caused.

By applying the embodiment of the invention, only the symmetric neighbor AP (namely the effective neighbor AP) is adjusted, so that the problem of asymmetric neighbor adjustment can be avoided.

Corresponding to the above method embodiments, the embodiments of the present invention further provide a transmit power adjustment apparatus.

Fig. 2 is a schematic structural diagram of a transmit power adjustment apparatus according to an embodiment of the present invention, including:

a first determining module 201, configured to determine at least one second AP existing in a first neighbor list of the first AP;

an inquiring module 202, configured to inquire whether the first AP exists in a second neighbor list of the at least one second AP stored in the wireless controller AC;

a second determining module 203, configured to determine, as a valid neighbor AP of the first AP, a second AP corresponding to a second neighbor list where the query result indicates that the first AP exists;

a first determining module 204, configured to determine whether the number of valid neighbor APs of the first AP is less than a preset threshold;

an increasing module 205, configured to increase the transmission power when the first determining module 204 determines that the result is yes;

a third determining module 206, configured to determine a target valid neighbor AP from the valid neighbor APs when the first determining module 204 determines that the target valid neighbor AP is not valid,

a fourth determining module 207, configured to determine the signal strength of the first AP detected by the target valid neighbor AP;

a second determining module 208, configured to determine whether the signal strength of the first AP detected by the target valid neighbor AP is within a preset interval;

and an adjusting module 209, configured to adjust the transmission power when the second determining module 208 determines that the result is negative.

In the embodiment of the present invention, the adjusting module 209 may be specifically configured to:

In the illustrated embodiment of the present invention, the third determining module 206 may include: a receiving sub-module and a screening sub-module (not shown), wherein,

the receiving submodule is used for receiving a selection instruction sent by a user;

and the screening submodule is used for screening the effective neighbor AP of the first AP according to the selection instruction to obtain the target effective neighbor AP.

In the illustrated embodiment of the present invention, the third determining module 206 may include: a sorting sub-module and a determining sub-module (not shown), wherein,

the sequencing submodule is used for sequencing the effective neighbor APs according to the signal intensity of the first AP detected by the effective neighbor APs;

and the determining submodule is used for determining the effective neighbor AP positioned in the preset rank as the target effective neighbor AP.

In the illustrated embodiment of the present invention, the apparatus may further include:

a third judging module (not shown in the figure) for judging whether the trigger condition of the transmission power adjustment is satisfied; wherein the transmit power adjustment triggering condition comprises: detecting an increase or decrease in neighbor APs; or, reaching a preset time; or when reaching the preset time, detecting to increase or decrease the neighbor AP;

if so, the first determination module 201 is triggered.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

All the embodiments in the present specification are described in a related manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, as for the apparatus embodiment, since it is substantially similar to the method embodiment, the description is relatively simple, and for the relevant points, reference may be made to the partial description of the method embodiment.

Those skilled in the art will appreciate that all or part of the steps in the above method embodiments may be implemented by a program to instruct relevant hardware to perform the steps, and the program may be stored in a computer-readable storage medium, which is referred to herein as a storage medium, such as: ROM/RAM, magnetic disk, optical disk, etc.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.

Claims

1. A method for adjusting transmission power, applied to a first wireless Access Point (AP), includes:

for each second AP, if the query result in the second neighbor list of the second AP indicates that the first AP exists, determining the second AP as a valid neighbor AP of the first AP;

and when the judgment result is negative, adjusting the transmitting power.

2. The method of claim 1, wherein the adjusting the transmit power comprises:

when the detected signal intensity of the first AP is greater than the maximum value of the preset interval, reducing the transmitting power;

and when the detected signal strength of the first AP is smaller than the minimum value of the preset interval, increasing the transmission power.

3. The method of claim 1, wherein the determining a target valid neighbor AP from the valid neighbor APs comprises:

receiving a selection instruction sent by a user;

4. The method of claim 1, wherein the determining a target valid neighbor AP from the valid neighbor APs comprises:

sequencing the effective neighbor APs according to the signal intensity of the first AP detected by the effective neighbor APs;

and determining the effective neighbor AP positioned in the preset rank as the target effective neighbor AP.

5. The method of any of claims 1-4, further comprising, prior to the determining at least one second AP present in the first neighbor list of the first AP:

judging whether a transmission power adjustment triggering condition is met; wherein the transmit power adjustment triggering condition comprises:

detecting an increase or decrease in neighbor APs; or, reaching a preset time;

or when reaching the preset time, detecting to increase or decrease the neighbor AP;

if so, performing the step of determining at least one second AP present in the first neighbor list of the first AP.

6. A transmission power adjustment device applied to a first wireless Access Point (AP) comprises:

a second determining module, configured to determine, for each second AP, if a query result in a second neighbor list of the second AP indicates that the first AP exists, the second AP as a valid neighbor AP of the first AP;

7. The apparatus of claim 6, wherein the adjustment module is specifically configured to:

8. The apparatus of claim 6, wherein the third determining module comprises:

9. The apparatus of claim 6, wherein the third determining module comprises:

10. The apparatus according to any one of claims 6-9, further comprising:

the third judging module is used for judging whether the transmitting power adjustment triggering condition is met; wherein the transmit power adjustment triggering condition comprises:

detecting an increase or decrease in neighbor APs; or, reaching a preset time;

if yes, triggering the first determination module.