CN102781087B - Transmission power adjustment method, device and access device - Google Patents
Transmission power adjustment method, device and access device Download PDFInfo
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- CN102781087B CN102781087B CN201210270129.5A CN201210270129A CN102781087B CN 102781087 B CN102781087 B CN 102781087B CN 201210270129 A CN201210270129 A CN 201210270129A CN 102781087 B CN102781087 B CN 102781087B
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Abstract
The invention provides a kind of transmission power adjustment method, device and access device, method comprises: from the power grade scope that terminal is corresponding, select transmitting power that power grade is corresponding as current transmit power, the packet loss that under adding up described current transmit power, each transmission rate is corresponding; The packet loss corresponding according to described each transmission rate calculates the assessed value of described current transmit power; Assessed value according to described current transmit power adjusts described current transmit power.Present invention also offers a kind of transmitting power adjusting device and access device.The present invention can select, concerning preferably transmitting power terminal, to avoid occurring causing because transmitting power is excessive producing larger same frequency/adjacent frequency interference, or the situation causing terminal normally to receive because transmitting power is too small.
Description
Technical field
The present invention relates to the communication technology, particularly relate to a kind of transmission power adjustment method, device and access device.
Background technology
Along with the development of broadband wireless access, WLAN (wireless local area network) (WirelessLocalAreaNetwork; Hereinafter referred to as: breadth and depth WLAN) applied has brought up to unprecedented degree.WLAN wherein based on IEEE802.11b is operated in 2.4GHz frequency range, and the frequency range of this frequency range is 2.4GHz ~ 2.4835GHz, have 13 channels, but wherein non-interfering channel only has 1,6,11 these three channels.Such WLAN must expose channel resource conflict under the dense deployment environment such as School Network, causes the problem of wlan network throughput degradation with frequency/adjacent frequency serious interference.Access point (AccessPoint in maximum reduction WLAN; Hereinafter referred to as: AP) radio-frequency emission power is the method for a kind of effective reduction with the interference of frequency/adjacent frequency.If but AP radio-frequency emission power is too low, work station (Station may be caused again; Hereinafter referred to as: signal STA) received is too weak, causes AP to retransmit packet loss and increases, make wlan network throughput degradation.
Usually only according to the signal strength signal intensity adjustment AP radio-frequency emission power of STA in prior art, namely the signal strength signal intensity of STA is larger, and the AP radio-frequency emission power of selection is less, and the signal strength signal intensity of STA is less, and the AP radio-frequency emission power of selection is larger; The method can reach the object reducing AP radio-frequency emission power, thus reduces with the interference of frequency/adjacent frequency.
But, when STA close together but uses less transmitting power to send message to AP, adopt method of the prior art can select too high AP radio-frequency emission power, when STA is distant but use larger transmitting power to AP send message time, adopt said method can select too low AP radio-frequency emission power, thus produce larger same frequency/adjacent frequency interference, or STA is caused normally to receive.
Summary of the invention
The invention provides a kind of transmission power adjustment method, device and access device, can select preferably transmitting power terminal, avoid occurring causing because transmitting power is excessive producing larger same frequency/adjacent frequency interference, or the situation causing terminal normally to receive because transmitting power is too small.
First aspect of the present invention is to provide a kind of transmission power adjustment method, comprising:
From the power grade scope that terminal is corresponding, select transmitting power that power grade is corresponding as current transmit power, the packet loss that under adding up described current transmit power, each transmission rate is corresponding;
The packet loss corresponding according to described each transmission rate calculates the assessed value of described current transmit power;
Assessed value according to described current transmit power adjusts described current transmit power.
Another aspect of the present invention is to provide a kind of transmitting power adjusting device, comprising:
Statistical module, for from power grade scope corresponding to terminal, select power grade corresponding transmitting power as current transmit power, the packet loss that under adding up described current transmit power, each transmission rate is corresponding;
Evaluation module, calculates the assessed value of described current transmit power for the packet loss corresponding according to described each transmission rate;
Adjusting module, adjusts described current transmit power for the assessed value according to described current transmit power.
Another aspect of the present invention is to provide a kind of access device, comprises above-mentioned transmitting power adjusting device.
Technique effect of the present invention is: the transmitting power that selection power grade is corresponding from the power grade scope that terminal is corresponding is as current transmit power, the packet loss that under adding up described current transmit power, each transmission rate is corresponding, the packet loss corresponding according to described each transmission rate calculates the assessed value of described current transmit power, the packet loss corresponding according to each transmission rate calculates the assessed value of current transmit power, and the assessed value according to current transmit power adjusts current transmit power.The present embodiment can be selected, concerning preferably transmitting power terminal, to avoid occurring causing because transmitting power is excessive producing larger same frequency/adjacent frequency interference, or the situation causing terminal normally to receive because transmitting power is too small.
Accompanying drawing explanation
Fig. 1 is the flow chart of transmission power adjustment method embodiment one of the present invention;
Fig. 2 is the flow chart of transmission power adjustment method embodiment two of the present invention;
Fig. 3 is the structural representation of transmitting power adjusting device embodiment one of the present invention;
Fig. 4 is the structural representation of transmitting power adjusting device embodiment two of the present invention.
Embodiment
Fig. 1 is the flow chart of transmission power adjustment method embodiment one of the present invention, as shown in Figure 1, present embodiments provides a kind of transmission power adjustment method, can specifically comprise the steps:
Step 101, selects transmitting power that power grade is corresponding as current transmit power, the packet loss that under adding up described current transmit power, each transmission rate is corresponding from the power grade scope that terminal is corresponding.
In the present embodiment, before adjusting the transmitting power of AP, can obtain the power grade scope that this terminal is corresponding in advance, this power grade scope sends power grade scope corresponding to the radio-frequency emission power that uses of message to this terminal for AP.Terminal in the present embodiment can be specially STA.After getting power grade scope corresponding to terminal, a transmitting power can be selected from this power grade scope, use this transmitting power to send message to terminal, emission center power in this power grade scope under initial situation, can be selected as current transmit power.Then the different transmission rates under current transmit power are selected according to the rate algorithms of AP, the packet loss produced when statistics adopts each transmission rate to send message respectively.
Step 102, the packet loss corresponding according to each transmission rate calculates the assessed value of current transmit power.
The packet loss corresponding according to each transmission rate under the current transmit power that statistics obtains, calculates the assessed value of current transmit power, namely obtains goodput by transmission rate and packet loss, and assess current transmit power with goodput.
Step 103, the assessed value according to current transmit power adjusts described current transmit power.
After calculating the assessed value of current transmit power, according to this assessed value, current transmit power is adjusted.If the assessed value of current transmit power is higher, then show to adopt the goodput of current transmit power transmission message larger; If the assessed value of current transmit power is lower, then show to adopt the goodput of current transmit power transmission message less.Adjust within the scope of the power grade that the present embodiment specifically gets in above-mentioned steps 101 adjustment of current transmit power, Modulating Power grade up or down on the basis of power grade corresponding to current transmit power, then using transmitting power corresponding to power grade after adjustment as new current transmit power, thus to get for preferably transmitting power this terminal.
Present embodiments provide a kind of transmission power adjustment method, the transmitting power that selection power grade is corresponding from the power grade scope that terminal is corresponding is as current transmit power, the packet loss that under adding up described current transmit power, each transmission rate is corresponding, the packet loss corresponding according to described each transmission rate calculates the assessed value of described current transmit power, the packet loss corresponding according to each transmission rate calculates the assessed value of current transmit power, and the assessed value according to current transmit power adjusts current transmit power.The present embodiment can be selected, concerning preferably transmitting power terminal, to avoid occurring causing because transmitting power is excessive producing larger same frequency/adjacent frequency interference, or the situation causing terminal normally to receive because transmitting power is too small.
Fig. 2 is the flow chart of transmission power adjustment method embodiment two of the present invention, as shown in Figure 2, present embodiments provides a kind of transmission power adjustment method, can specifically comprise the steps:
Step 201, the signal strength signal intensity of STA according to the message Real-time Obtaining from STA.
In the present embodiment, when AP receives the message of STA, all by the signal strength signal intensity of this STA of message Real-time Obtaining from STA, the message that namely STA sends can identify the signal strength signal intensity of this STA.
Step 202, judges that this STA is the STA of new association, if so, then performs step 204, otherwise perform step 203.
When AP receives the message of STA, first can judge whether this STA is the new STA associated, and namely judges whether AP receives the message of this STA first, the relevant information of this STA was not preserved in AP before AP and STA associates, if so, then perform step 204, otherwise perform step 203.
Step 203, judges that the absolute value of the difference of the signal strength signal intensity of this STA that the signal strength signal intensity of the STA that the message be currently received identifies identifies with the last message received exceedes strength difference threshold value, if so, then performs step 204, otherwise perform step 206.
When STA is not the STA of new association, AP judges that the absolute value of the difference of the signal strength signal intensity of this STA that the signal strength signal intensity of the STA that the message be currently received identifies identifies with the last message received exceedes default strength difference threshold value, namely whether AP detects the signal strength signal intensity that STA sends message for twice and changes, and whether this change exceedes strength difference threshold value, if, then perform step 204, otherwise perform step 206.
Step 204, according to the signal strength signal intensity of STA and the total number of grades of power grade that divides in advance, generates the power grade that emission center power in power grade scope corresponding to STA is corresponding.
The absolute value of the difference of the signal strength signal intensity of this STA that the signal strength signal intensity of the STA identified when the message be currently received identifies with the last message received exceedes default strength difference threshold value, or when this STA is the STA of new association, again obtain the power grade scope that this STA is corresponding.The present embodiment is first according to the signal strength signal intensity of STA and the total number of grades of power grade that divides in advance, the power grade that emission center power in the power grade scope that generation STA is corresponding is corresponding, specifically the transmitting power of AP can be divided into N(and 1-N in advance) individual grade, each grade is a corresponding transmitting power respectively.The power grade that emission center power in the power grade scope that STA is corresponding is corresponding, can specifically adopt following formula (1) to calculate:
Wherein, N
cfor the power grade that the emission center power in the power grade scope that STA is corresponding is corresponding, can according to N according to the power grade divided before
cget corresponding emission center power, N is the total number of grades of the power grade divided in advance, and RSSI is the signal strength signal intensity of STA, and its value is 0-100.
Step 205, the power grade corresponding according to emission center power and the grade point preset generate power grade scope corresponding to described STA.
Obtaining power grade corresponding to the emission center power in power grade scope corresponding to STA, the power grade corresponding according to this emission center power and the grade point preset generate power grade scope corresponding to this STA, and the transmitting power in this power grade scope corresponding to each power grade is the transmitting power that AP can adopt to this STA transmission message.Particularly, following formula (2) and (3) can be adopted respectively to obtain lower limit and the higher limit of power grade scope corresponding to this STA:
P
min＝MAX(0,N
c-M)(2)
P
max＝MIN(N,N
c+M)(3)
Wherein, M is default grade point, and M is for being less than N
cpositive integer, thus power grade scope corresponding to STA can be obtained for [P
min, P
max].
Step 206, adds up the packet loss that each transmission rate under the current transmit power selected from described power grade scope is corresponding.
According to above-mentioned steps, as the STA that this STA is not new association, and the absolute value of the difference of the signal strength signal intensity of this STA that the signal strength signal intensity of STA that the message be currently received identifies identifies with the last message received is not when exceeding default strength difference threshold value, show that the change sending the signal strength signal intensity of message before and after STA for twice is less, STA is current may not be moved, and due to transmitting power and distance dependent, then now without the need to again obtaining power grade scope corresponding to this STA, the power grade scope obtained before still adopting; As the STA that this STA is new association, or when the absolute value of the difference of the signal strength signal intensity of this STA that the signal strength signal intensity of the STA that the message be currently received identifies identifies with the last message received exceedes default strength difference threshold value, show to send changing greatly of the signal strength signal intensity of message twice before and after STA, STA is current may be moved, and due to transmitting power and distance dependent, then now need again to obtain power grade scope corresponding to this STA.After getting power grade scope corresponding to STA, AP can select transmitting power to send message to STA from this power grade scope, first can select N under initial condition
ccorresponding emission center power is current transmit power.Namely emission center power is adopted to send message to STA, and the packet loss that under adding up current transmit power, each transmission rate is corresponding.In the present embodiment, existing rate algorithms can be adopted to select the transmission rate under current transmit power, then adopt each transmission rate to send message to STA respectively, obtain the packet loss that each transmission rate is corresponding.
Step 207, according to each transmission rate and packet loss corresponding to each transmission rate, calculates the throughput that each transmission rate is corresponding respectively.
After getting the packet loss that under current transmit power, each transmission rate is corresponding, according to each transmission rate and packet loss corresponding to each transmission rate, calculate the throughput that each transmission rate is corresponding respectively.Because transmission rate can reflect maximum throughput theoretically, the larger then goodput of packet loss is less, and therefore, the present embodiment can specifically adopt following formula (4) to calculate throughput corresponding to each transmission rate:
E
i＝R
i×(1-per
i)（4）
Wherein, i=0,1,2 ... (k-1), k is the number of all transmission rates under the current transmit power of this STA and AP negotiation, R
ibe i-th transmission rate, per
ifor transmission rate R
icorresponding packet loss, E
ifor transmission rate R
icorresponding throughput.
Step 208, the throughput corresponding according to each transmission rate generates the assessed value of current transmit power.
After calculating throughput corresponding to each transmission rate, the assessed value of current transmit power is generated according to each throughput, specifically using the assessed value of throughput sum corresponding for transmission rate each under current transmit power as this current transmit power, following formula (5) namely can be adopted to calculate the assessed value of current transmit power:
Step 209, judges whether the absolute value of the difference of the assessed value of current transmit power and the assessed value of a upper transmitting power exceedes default assessment difference threshold, if so, then performs step 210, otherwise performs step 213.
After getting the assessed value of current power, judge whether the absolute value of the difference of the assessed value of current transmit power and the assessed value of a upper transmitting power exceedes default assessment difference threshold, if so, then perform step 210, otherwise perform step 213.The present embodiment is under guarantee throughput impregnable prerequisite, reduces transmitting power as far as possible, and the assessed value of transmitting power can be used for weighing the size of throughput; Therefore the present embodiment compares the size of the assessed value of former and later two transmitting powers, if assessed value increases, then can reduce transmitting power, if assessed value reduces, then can increase transmitting power.And the object that assessment difference threshold is set herein be in order to avoid the assessed value difference of former and later two transmitting powers less time do not stop to adjust transmitting power, cause transmitting power to fluctuate larger problem.If this current transmit power is Initial Trans, then the assessed value of a upper transmitting power herein can be set as a preset value, and whether the absolute value comparing the assessed value of current transmit power and the difference of preset value exceedes assessment difference threshold.If current transmit power is not Initial Trans, then go up a transmitting power be current transmit power adjustment before transmitting power.
Step 210, judges whether the assessed value of current transmit power is greater than the assessed value of a transmitting power, if so, then performs step 211, otherwise performs step 212.
When the absolute value of the difference of the assessed value of current transmit power and the assessed value of a upper transmitting power exceedes default assessment difference threshold, show that the transmitting power difference of the twice transmission message in front and back is larger, can adjust transmitting power, then continue the size judging the assessed value of current transmit power and the assessed value of a upper transmitting power, namely judge whether the assessed value of current transmit power is greater than the assessed value of a transmitting power, if, then perform step 211, otherwise perform step 212.
Step 211, is adjusted to the transmitting power that the lower level of the grade that current transmit power is corresponding in power grade scope is corresponding by current transmit power, and adopts the transmitting power after adjustment to send message to STA, and returns execution step 201.
If the assessed value of current transmit power is greater than the assessed value of a transmitting power, then show the throughput increase relatively before that current transmit power is corresponding, current transmit power can be adjusted to the transmitting power that the lower level of the grade that current transmit power is corresponding in power grade scope is corresponding, namely within the scope of power grade to downward whole transmitting power, and adopt adjustment after transmitting power send message to STA.If the current transmit power power that to be the lower limit of power grade in power grade scope corresponding, then can maintain current transmit power constant, and return and perform step 201.
Step 212, is adjusted to the transmitting power that a upper grade of the grade that in power grade scope, current transmit power is corresponding is corresponding by current transmit power, and adopts the transmitting power after adjustment to send message to STA, and returns execution step 201.
If the assessed value of current transmit power is less than the assessed value of a transmitting power, then show the throughput minimizing relatively before that current transmit power is corresponding, current transmit power can be adjusted to the transmitting power that a upper grade of the grade that in power grade scope, current transmit power is corresponding is corresponding, namely within the scope of power grade to rise whole transmitting power, and adopt the transmitting power after adjustment to send message to STA, and return execution step 201.If the current transmit power power that to be the higher limit of power grade in power grade scope corresponding, then can maintain current transmit power constant.
Step 213, maintains current transmit power constant, and adopts current transmit power to send message to STA, and returns execution step 201.
If the absolute value of the difference of the assessed value of the assessed value of current transmit power and a upper transmitting power does not exceed default assessment difference threshold, then show that the transmitting power difference of the twice transmission message in front and back is less, can not adjust transmitting power, to avoid the fluctuation of transmitting power too large, therefore current transmit power is maintained constant, and adopt current transmit power to send message to STA, and return execution step 201.
Present embodiments provide a kind of transmission power adjustment method, the transmitting power that selection power grade is corresponding from the power grade scope that terminal is corresponding is as current transmit power, the packet loss that under adding up described current transmit power, each transmission rate is corresponding, the packet loss corresponding according to described each transmission rate calculates the assessed value of described current transmit power, the packet loss corresponding according to each transmission rate calculates the assessed value of current transmit power, and the assessed value according to current transmit power adjusts current transmit power.The present embodiment can be selected, concerning preferably transmitting power terminal, to avoid occurring causing because transmitting power is excessive producing larger same frequency/adjacent frequency interference, or the situation causing terminal normally to receive because transmitting power is too small; And the present embodiment selects less transmitting power as emission center power corresponding to STA as much as possible, thus select the power grade scope that less grade, realize reducing transmitting power as much as possible, but simultaneously by assessing each transmitting power to ensure that corresponding throughput can not reduce; Therefore the present embodiment under the impregnable prerequisite of guarantee AP performance, can farthest reduce the transmitting power of AP, effectively reduces with the interference of frequency/adjacent frequency, improves the whole net throughput of WLAN (wireless local area network).
One of ordinary skill in the art will appreciate that: all or part of step realizing above-mentioned each embodiment of the method can have been come by the hardware that program command is relevant.Aforesaid program can be stored in a computer read/write memory medium.This program, when performing, performs the step comprising above-mentioned each embodiment of the method; And aforesaid storage medium comprises: ROM, RAM, magnetic disc or CD etc. various can be program code stored medium.
Fig. 3 is the structural representation of transmitting power adjusting device embodiment one of the present invention, as shown in Figure 3, present embodiments provides a kind of transmitting power adjusting device, specifically can perform each step in said method embodiment one, repeat no more herein.The transmitting power adjusting device that the present embodiment provides specifically can comprise statistical module 301, evaluation module 302 and adjusting module 303.Wherein, statistical module 301 for from power grade scope corresponding to terminal, select power grade corresponding transmitting power as current transmit power, the packet loss that under adding up described current transmit power, each transmission rate is corresponding.Evaluation module 302 calculates the assessed value of described current transmit power for the packet loss corresponding according to described each transmission rate.Adjusting module 303 adjusts described current transmit power for the assessed value according to described current transmit power.
Fig. 4 is the structural representation of transmitting power adjusting device embodiment two of the present invention, as shown in Figure 4, present embodiments provides a kind of transmitting power adjusting device, specifically can perform each step in said method embodiment two, repeat no more herein.The transmitting power adjusting device that the present embodiment provides, on the basis shown in above-mentioned Fig. 3, also comprises signal strength signal intensity acquisition module 401 and rate range acquisition module 402.Wherein, signal strength signal intensity acquisition module 401 is for the signal strength signal intensity of terminal according to the message Real-time Obtaining from described terminal.When rate range acquisition module 402 is for being the new terminal associated when described terminal, or, when the terminal that described terminal is not new association, and the absolute value of the difference of the signal strength signal intensity of described terminal that the signal strength signal intensity of described terminal that the message be currently received identifies identifies with the last message received is when exceeding strength difference threshold value, according to the signal strength signal intensity of described terminal and the total number of grades of power grade that divides in advance, obtain the power grade scope that described terminal is corresponding.
Particularly, the rate range acquisition module 402 in the present embodiment specifically can comprise the first generation unit 412 and the second generation unit 422.Wherein, when first generation unit 412 is for being the new terminal associated when described terminal, or, when the terminal that described terminal is not new association, and the absolute value of the difference of the signal strength signal intensity of described terminal that the signal strength signal intensity of described terminal that the message be currently received identifies identifies with the last message received is when exceeding strength difference threshold value, according to the signal strength signal intensity of described terminal and the total number of grades of power grade that divides in advance, generate the power grade that emission center power in power grade scope corresponding to described terminal is corresponding.Second generation unit 422 generates power grade scope corresponding to described terminal for the power grade corresponding according to described emission center power with the grade point preset.
Particularly, the first generation unit 412 in the present embodiment can specifically for according to the signal strength signal intensity of described terminal and the total number of grades of power grade that divides in advance, adopts above-mentioned computing formula (1) to generate power grade corresponding to emission center power in power grade scope corresponding to described terminal.
Particularly, the second generation unit 422 in the present embodiment can, specifically for according to power grade corresponding to described emission center power and the grade point preset, adopt above-mentioned formula (2) to generate the lower limit of power grade scope corresponding to described terminal; The power grade corresponding according to described emission center power and the grade point preset, adopt above-mentioned formula (3) to generate the higher limit of power grade scope corresponding to described terminal.
Particularly, the evaluation module 302 in the present embodiment specifically can comprise computing unit 312 and the 3rd generation unit 322.Wherein, computing unit 312, for according to described each transmission rate and packet loss corresponding to described each transmission rate, calculates the throughput that described each transmission rate is corresponding respectively.3rd generation unit 322 generates the assessed value of described current transmit power for the throughput corresponding according to described each transmission rate.
Particularly, the adjusting module 303 in the present embodiment specifically can comprise judging unit 313, first adjustment unit 323 and the second adjustment unit 333.Wherein, when judging unit 313 exceedes default assessment difference threshold for the absolute value of the difference when the assessed value of described current transmit power and the assessed value of a upper transmitting power, judge whether the assessed value of described current transmit power is greater than the assessed value of a described upper transmitting power.If the first adjustment unit 323 is greater than the assessed value of a described upper transmitting power for the assessed value of current transmit power, then current transmit power is adjusted to the transmitting power that the lower level of the grade that current transmit power is corresponding described in described power grade scope is corresponding.If the second adjustment unit 333 is less than the assessed value of a described upper transmitting power for the assessed value of current transmit power, then current transmit power is adjusted to the transmitting power that a upper grade of the grade that described in described power grade scope, current transmit power is corresponding is corresponding.Wherein, when described current transmit power is Initial Trans, the assessed value of a described upper transmitting power is set as default assessed value; When described current transmit power is not Initial Trans, a described upper transmitting power is the transmitting power before described current transmit power adjustment.
Present embodiments provide a kind of transmitting power adjusting device, the transmitting power that selection power grade is corresponding from the power grade scope that terminal is corresponding is as current transmit power, the packet loss that under adding up described current transmit power, each transmission rate is corresponding, the packet loss corresponding according to described each transmission rate calculates the assessed value of described current transmit power, the packet loss corresponding according to each transmission rate calculates the assessed value of current transmit power, and the assessed value according to current transmit power adjusts current transmit power.The present embodiment can be selected, concerning preferably transmitting power terminal, to avoid occurring causing because transmitting power is excessive producing larger same frequency/adjacent frequency interference, or the situation causing terminal normally to receive because transmitting power is too small; And the present embodiment selects less transmitting power as emission center power corresponding to STA as much as possible, thus select the power grade scope that less grade, realize reducing transmitting power as much as possible, but simultaneously by assessing each transmitting power to ensure that corresponding throughput can not reduce; Therefore the present embodiment under the impregnable prerequisite of guarantee AP performance, can farthest reduce the transmitting power of AP, effectively reduces with the interference of frequency/adjacent frequency, improves the whole net throughput of WLAN (wireless local area network).
The present embodiment additionally provides a kind of access device, specifically can comprise the transmitting power adjusting device shown in above-mentioned Fig. 3 or Fig. 4.
Last it is noted that above each embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to foregoing embodiments to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (9)
1. a transmission power adjustment method, is characterized in that, comprising:
From the power grade scope that terminal is corresponding, select transmitting power that power grade is corresponding as current transmit power, the packet loss that under adding up described current transmit power, each transmission rate is corresponding;
The packet loss corresponding according to described each transmission rate calculates the assessed value of described current transmit power;
Assessed value according to described current transmit power adjusts described current transmit power;
The assessed value that the described packet loss corresponding according to described each transmission rate calculates described current transmit power comprises:
According to described each transmission rate and packet loss corresponding to described each transmission rate, calculate the throughput that described each transmission rate is corresponding respectively;
Using the assessed value of throughput sum corresponding for each transmission rate described under described current transmit power as described current transmit power;
The described assessed value according to described current transmit power is carried out adjustment to described current transmit power and is comprised:
When the absolute value of the difference of the assessed value of described current transmit power and the assessed value of a upper transmitting power exceedes default assessment difference threshold, judge whether the assessed value of described current transmit power is greater than the assessed value of a described upper transmitting power;
If the assessed value of current transmit power is greater than the assessed value of a described upper transmitting power, then current transmit power is adjusted to the transmitting power that the lower level of the grade that current transmit power is corresponding described in described power grade scope is corresponding;
If the assessed value of current transmit power is less than the assessed value of a described upper transmitting power, then current transmit power is adjusted to the transmitting power that a upper grade of the grade that described in described power grade scope, current transmit power is corresponding is corresponding;
Wherein, when described current transmit power is Initial Trans, the assessed value of a described upper transmitting power is set as default assessed value; When described current transmit power is not Initial Trans, a described upper transmitting power is the transmitting power before described current transmit power adjustment.
2. method according to claim 1, is characterized in that, also comprises:
The signal strength signal intensity of terminal according to the message Real-time Obtaining from described terminal;
When described terminal is the terminal of new association, or, when the terminal that described terminal is not new association, and the absolute value of the difference of the signal strength signal intensity of described terminal that the signal strength signal intensity of described terminal that the message be currently received identifies identifies with the last message received is when exceeding strength difference threshold value, according to the signal strength signal intensity of described terminal and the total number of grades of power grade that divides in advance, obtain the power grade scope that described terminal is corresponding.
3. method according to claim 2, is characterized in that, the described signal strength signal intensity according to described terminal and the total number of grades of power grade divided in advance, and the power grade scope obtaining described terminal corresponding comprises:
According to the signal strength signal intensity of described terminal and the total number of grades of power grade that divides in advance, generate the power grade that emission center power in power grade scope corresponding to described terminal is corresponding;
The power grade corresponding according to described emission center power and the grade point preset generate power grade scope corresponding to described terminal.
4. method according to claim 3, it is characterized in that, the described signal strength signal intensity according to described terminal and the total number of grades of power grade divided in advance, the power grade generating emission center power in power grade scope corresponding to described terminal corresponding comprises:
According to the signal strength signal intensity of described terminal and the total number of grades of power grade that divides in advance, following computing formula is adopted to generate power grade corresponding to emission center power in power grade scope corresponding to described terminal:
Wherein, N
cfor the power grade that the emission center power in the power grade scope that described terminal is corresponding is corresponding, N is the total number of grades of the power grade divided in advance, and RSSI is the signal strength signal intensity of described terminal.
5. method according to claim 3, is characterized in that, the power grade scope that the described power grade corresponding according to described emission center power and the grade point preset generate described terminal corresponding comprises:
The power grade corresponding according to described emission center power and the grade point preset, adopt following formula to generate the lower limit of power grade scope corresponding to described terminal:
P
min＝MAX(0,N
c-M)；
The power grade corresponding according to described emission center power and the grade point preset, adopt following formula to generate the higher limit of power grade scope corresponding to described terminal:
P
max＝MIN(N,N
c+M)；
Wherein, M is default grade point, and M is for being less than N
cpositive integer, N
cfor the power grade that the emission center power in the power grade scope that described terminal is corresponding is corresponding.
6. a transmitting power adjusting device, is characterized in that, comprising:
Statistical module, for from power grade scope corresponding to terminal, select power grade corresponding transmitting power as current transmit power, the packet loss that under adding up described current transmit power, each transmission rate is corresponding;
Evaluation module, calculates the assessed value of described current transmit power for the packet loss corresponding according to described each transmission rate;
Adjusting module, adjusts described current transmit power for the assessed value according to described current transmit power;
Described evaluation module comprises:
Computing unit, for according to described each transmission rate and packet loss corresponding to described each transmission rate, calculates the throughput that described each transmission rate is corresponding respectively;
3rd generation unit, for using the assessed value of throughput sum corresponding for each transmission rate described under described current transmit power as described current transmit power;
Described adjusting module comprises:
Judging unit, when absolute value for the difference when the assessed value of described current transmit power and the assessed value of a upper transmitting power exceedes default assessment difference threshold, judge whether the assessed value of described current transmit power is greater than the assessed value of a described upper transmitting power;
First adjustment unit, if the assessed value for current transmit power is greater than the assessed value of a described upper transmitting power, then current transmit power is adjusted to the transmitting power that the lower level of the grade that current transmit power is corresponding described in described power grade scope is corresponding;
Second adjustment unit, if the assessed value for current transmit power is less than the assessed value of a described upper transmitting power, then current transmit power is adjusted to the transmitting power that a upper grade of the grade that described in described power grade scope, current transmit power is corresponding is corresponding;
Wherein, when described current transmit power is Initial Trans, the assessed value of a described upper transmitting power is set as default assessed value; When described current transmit power is not Initial Trans, a described upper transmitting power is the transmitting power before described current transmit power adjustment.
7. device according to claim 6, is characterized in that, also comprises:
Signal strength signal intensity acquisition module, for the signal strength signal intensity of terminal according to the message Real-time Obtaining from described terminal;
Rate range acquisition module, during for being the new terminal associated when described terminal, or, when the terminal that described terminal is not new association, and the absolute value of the difference of the signal strength signal intensity of described terminal that the signal strength signal intensity of described terminal that the message be currently received identifies identifies with the last message received is when exceeding strength difference threshold value, according to the signal strength signal intensity of described terminal and the total number of grades of power grade that divides in advance, obtain the power grade scope that described terminal is corresponding.
8. device according to claim 7, is characterized in that, described rate range acquisition module comprises:
First generation unit, during for being the new terminal associated when described terminal, or, when the terminal that described terminal is not new association, and the absolute value of the difference of the signal strength signal intensity of described terminal that the signal strength signal intensity of described terminal that the message be currently received identifies identifies with the last message received is when exceeding strength difference threshold value, according to the signal strength signal intensity of described terminal and the total number of grades of power grade that divides in advance, generate the power grade that emission center power in power grade scope corresponding to described terminal is corresponding;
Second generation unit, generates power grade scope corresponding to described terminal for the power grade corresponding according to described emission center power with the grade point preset.
9. an access device, is characterized in that, comprises the transmitting power adjusting device according to any one of claim 6-8.
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| CN105453657B (en) * | 2014-06-16 | 2019-07-09 | 华为技术有限公司 | A kind of access point, website, access controller and noise emission method |
| CN104506444A (en) * | 2014-12-02 | 2015-04-08 | 上海斐讯数据通信技术有限公司 | Power display method for router and router |
| CN104661295B (en) * | 2015-01-24 | 2018-01-16 | 杭州敦崇科技股份有限公司 | Packet-by-packet Poewr control method based on rate set |
| CN105188113B (en) * | 2015-06-08 | 2019-10-29 | 联想(北京)有限公司 | A kind of information processing method and radio reception device |
| CN105451323B (en) * | 2015-12-01 | 2018-10-09 | 中国联合网络通信集团有限公司 | Home gateway transmission power adjustment method and device |
| CN105873201B (en) * | 2016-06-12 | 2019-04-12 | 浙江大学 | A kind of power regulating method based on RSSI |
| JP6918004B2 (en) * | 2016-09-29 | 2021-08-11 | 株式会社Ｎｔｔドコモ | Terminals, communication methods, and wireless communication systems |
| CN106792462B (en) * | 2016-12-22 | 2020-05-22 | 深圳Tcl数字技术有限公司 | Bluetooth audio transmission adjusting method and device |
| CN109769291B (en) * | 2017-11-09 | 2022-09-13 | 中国移动通信有限公司研究院 | Terminal power control method and terminal |
| CN109041189B (en) * | 2018-07-20 | 2021-07-30 | 深圳全志在线有限公司 | Transmission power control method and device of wireless communication equipment |
| CN110875756B (en) * | 2018-08-29 | 2021-07-02 | 杭州海康威视数字技术股份有限公司 | Method and equipment for automatically adjusting transmitting power in frequency hopping communication |
| CN109544744A (en) * | 2018-11-20 | 2019-03-29 | 北京千丁互联科技有限公司 | Intelligent door lock communication system and method |
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