CN106211296A - A kind of base station power control method - Google Patents

Abstract

The present invention provides a base station power control method. The method includes: when it is necessary to turn on a small base station that is currently turned off, the macro base station determines that the value of reducing the transmission power of each small base station that is currently turned on is _PM / MP _M /(M+1), and notify the small base stations that are currently turned on, so that each small base station will reduce the transmission power by P _M /MP _M /(M+1); M is the small base station that is currently turned on P _M is the sum of the transmission powers of the current N small base stations; and the small base stations that are currently in the off state are notified to turn on and transmit signals with transmission power P _M /(M+1). Through this solution, the performance of densely deployed networks can be improved.

Description

A kind of base station power control method

technical field

The present invention relates to the field of communication technology, in particular to a base station power control method.

Background technique

With the continuous increase of wireless data traffic, the intensification of network deployment has become an important trend of future development.

On the one hand, dense network deployment can increase the data rate per unit area, but on the other hand, it will rapidly increase the interference level of the entire network, thus restricting the further improvement of network performance. Especially with the intensive deployment of networks, the problem of energy consumption has gradually become prominent.

Contents of the invention

In view of this, the present application provides a power control method to solve the problem of low efficiency in densely deployed networks.

In order to solve the problems of the technologies described above, the technical solution of the present application is achieved in the following way:

A base station power control method applied to a macro base station controlling N small base stations, the method comprising:

When it is necessary to turn on a small base station that is currently in the off state, the macro base station determines that the value of reducing the transmission power of each small base station that is currently in the on state is P _M /MP _M /(M+1), and notifies the For each small base station in the open state, each small base station will reduce the transmission power to PM /MP _M /( _M +1); _M is the number of small base stations that are currently in the open state, and PM is the number of current N small base stations. The sum of transmit power; N is an integer greater than 1, and M is an integer greater than 0 but not greater than N;

And notify the small base station which is currently in the off state to turn on, and transmit signals with the transmit power P _M /(M+1).

It can be seen from the above technical solution that in this application, when it is necessary to turn on a small base station that is currently in the off state, the macro base station determines that the small base station is in the The reduced value of the transmit power of each small base station in the turned-on state and the transmit power of the small base stations that need to be turned on can improve the efficiency of a densely deployed network.

Description of drawings

FIG. 1 is a schematic flow chart of a base station power control method when a small base station needs to be turned on in an embodiment of the present application;

FIG. 2 is a schematic flowchart of a power control method when a small base station needs to be turned off in an embodiment of the present application.

detailed description

In order to make the object, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below with reference to the accompanying drawings and examples.

The embodiment of the present application provides a base station power control method. Multiple small base stations can be deployed in a centrally controlled area of a macro base station. There is a backhaul connection between the macro base station and each small base station, and the macro base station can centrally schedule and control each small base station.

In the following, it is taken that a macro base station controls N small base stations as an example, where N is an integer greater than 1. The maximum value of the transmit power of each small base station in the system is a preset upper limit transmit power threshold, that is, the transmit power of each small base station will not exceed the threshold.

Among the small base stations controlled by the macro base station, when it is necessary to turn on a small base station that is currently in the off state, if there is no small base station that is already in the on state, that is, the small base station is the first small base station to be turned on, then The small base station that needs to be turned on is notified to turn on, and transmits a signal with a preset transmission power upper limit threshold.

If the small base stations controlled by the macro base station are not turned on, that is, when they are in an off state, the transmit power of the small base stations is 0.

The closing and opening in the embodiment of the present application refer to each small base station for its corresponding user terminal. When a small base station is in the closed state, it means that the small base station does not transmit signals to the user terminal, nor does it receive signals sent by the user terminal. signal, but can communicate with the macro base station.

Referring to FIG. 1 , FIG. 1 is a schematic flowchart of a base station power control method when a small base station needs to be turned on in an embodiment of the present application. The specific steps are:

Step 101, when it is necessary to turn on a small base station that is currently turned off, the macro base station determines that the value of reducing the transmit power of each small base station that is currently turned on is P _M /MP _M /(M+1).

In this embodiment, it is assumed that there are M small base stations that are currently turned on, and the M+1th small base station needs to be turned on as an example. _M is the number of small base stations that are currently turned on, and PM is the sum of the transmit powers of the current N small base stations, that is, _PM is N is an integer greater than 1, and M is an integer greater than 0 but not greater than N.

The macro base station determines that the value of reducing the transmit power of each small base station that is currently turned on is $P_m/m-P_m/(m+1)=\frac{\underset{i=1}{\overset{N}{\mathrm{\Σ}}}{P}_i}{m}-\frac{\underset{i=1}{\overset{N}{\mathrm{\Σ}}}{P}_i}{m+1}.$

Step 102, the macro base station notifies each small base station that is currently turned on, so that each small base station reduces the transmit power by P _M /MP _M /(M+1).

After step 101, before performing step 102, the method further includes:

Traverse the small base stations that are currently turned on, and determine for any small base station whether there is a small base station with a current transmit power value not greater than P _M /MP _M /(M+1); if so, notify the small base station to turn off; otherwise, The small base station is notified to reduce the transmission power by P _M /MP _M /(M+1).

When the small base station receives a notification from the macro base station to reduce the transmission power by P _M /MP _M /(M+1), it reduces the transmission power of the small base station by P _M /MP _M /(M+1);

Step 103, the macro base station notifies the small base station which is currently in the off state to turn on, and transmits signals with the transmit power P _M /(M+1).

When the small base station receives the notification that the macro base station is turned on and transmits signals with transmit power P _M /(M+1), it turns on the base station and transmits signals with transmit power P _M /(M+1).

In step 103, after the macro base station notifies the small base station that is currently in the off state to turn it on, it further determines whether to adjust the transmit power of the small base station according to the path loss reported by the small base station, and the specific processing is as follows:

All the small base stations listen to each other after adjusting the power, and for any small base station, measure the path loss from each small base station to the small base station, and report it to the macro base station.

When the macro base station receives the path loss between the newly activated small base station and the adjacent small base station, it determines the minimum path loss PL _min among the path losses from the newly activated small base station to the adjacent small base station. When PL _min is not less than the preset When the path loss threshold PL _th is set, the newly activated small base station is notified to increase the transmit power by PL _th /PL _min ; otherwise, the newly activated small base station is informed to decrease the transmit power by PL _min /PL _th .

In the specific implementation, after adjusting the transmission power of the small base station according to the path loss ratio, it is also necessary to consider whether the transmission power of the small base station is between 0 and the preset transmission power upper threshold. If so, directly notify the small base station to adjust; otherwise, it needs to The processing of the response is as follows:

When PL _min is not less than the preset path loss threshold PL _th , the macro base station determines whether the transmit power of the newly enabled small base station is greater than PL _th after the transmit power of the newly enabled small base station is increased by PL _th /PL _min , if Yes, notify the newly enabled small base station to increase the transmit power to PL _th ; otherwise, notify the newly enabled small base station to increase the transmit power to PL _th /PL _min ;

When PL _min is less than PL _th , the macro base station determines whether the transmit power of the newly activated small base station is greater than PL _min /PL _th , and if so, notifies the newly activated small base station to lower the transmit power by PL _min /PL _th ; Otherwise, notify the newly enabled small base station to shut down.

Referring to FIG. 2 , FIG. 2 is a schematic flowchart of a power control method when a small base station needs to be turned off in an embodiment of the present application. The specific steps are:

Step 201, when it is necessary to turn off a small base station that is currently turned on, the macro base station determines that the value of increasing the transmit power of each small base station that is currently turned on is P _Q /(Q-1)-P _Q /Q.

In this embodiment, taking Q small base stations as an example that are currently enabled, that is, in the enabled state, one of the small base stations is turned off. Among them, Q is the number of small base stations that are currently turned on, and P _Q is the sum of the transmit powers of the current N small base stations, that is, P _Q is Q is an integer greater than 0 and not greater than N. The macro base station determines that the value of increasing the transmit power of each small base station that is currently turned on is

${\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; m</span>}}<span\; class="notranslate">\; /</span>\mathrm{<span\; class="notranslate">\; m</span>}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; m</span>}}<span\; class="notranslate">\; /</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; m</span>}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span>\frac{\underset{\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{\overset{\mathrm{<span\; class="notranslate">\; N</span>}}{\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}}}{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}}}{\mathrm{<span\; class="notranslate">\; m</span>}}<span\; class="notranslate">\; -</span>\frac{\underset{\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{\overset{\mathrm{<span\; class="notranslate">\; N</span>}}{\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}}}{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}}}{\mathrm{<span\; class="notranslate">\; m</span>}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; .</span>$

In step 202, the macro base station notifies the small base station which is currently turned on and does not need to be turned off to increase the transmission power by P _Q /(Q-1)-P _Q /Q.

In step 201, when it is determined that the value of increasing the transmission power of each small base station that is currently turned on is P _Q /(Q-1)-P _Q /Q, it is also necessary to determine that if the power of each small base station that is turned on is adjusted to When P _Q /(Q-1)-P _Q /Q is high, whether the preset transmission power upper limit threshold is exceeded, the specific processing method is as follows:

Traverse the small base stations that are currently turned on, and determine for any small base station whether the transmission power of the small base station is greater than the preset transmission power after the transmission power of the small base station is increased by P _Q /(Q-1)-P _Q /Q If the upper threshold is yes, the small base station is notified to increase the transmit power to the preset transmit power upper threshold; otherwise, the small base station is notified to increase the transmit power by P _Q /(Q-1)-P _Q /Q.

It can be seen that after the transmit power is increased by P _Q /(Q-1)-P _Q /Q, when the transmit power exceeds the preset transmit power upper threshold, the transmit power can be adjusted to the preset transmit power upper threshold.

When the small base station receives the notice from the macro base station to increase the transmission power by P _Q /(Q-1)-P _Q /Q, it increases the transmission power of the small base station by P _Q /(Q-1)-P _Q /Q;

When the small base station receives a notification from the macro base station to increase the transmit power to the preset upper limit threshold of transmit power, it increases the transmit power of the small base station to the preset upper limit threshold of transmit power.

Step 203, the macro base station notifies the small base station to be shut down.

When the small base station receives the notification of shutting down the small base station sent by the macro base station, it shuts down the small base station.

To sum up, in this application, when a small base station needs to be turned on or off, the macro base station adjusts the transmission power of the controlled small base station, thereby reducing the interference between base stations in the entire network and improving the efficiency of densely deployed networks.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the present invention. within the scope of protection.

Claims (7)

1. a base station power control method, is applied to control on the macro base station of N number of little base station, and its feature exists In, the method includes:

When needing to open the little base station that is currently at closed mode, described macro base station determines and will be currently at The value that each little base station transmitting power of opening is turned down is P_M/M-P_M/ (M+1), and notify to be currently at out Open each little base station of state, make each little base station that transmitting power is turned down P_M/M-P_M/(M+1)；M is current place In the number of the little base station of opening, P_MFor when the sum launching power of the little base station of top n；N is for being more than The integer of 1, M is the integer being not more than N more than 0；

And notify that the described little base station being currently at closed mode is opened, to launch power P_M/ (M+1) launches Signal.

Method the most according to claim 1, it is characterised in that described macro base station determines and will be currently at The value that each little base station transmitting power of opening is turned down is P_M/M-P_MDuring/(M+1), described method enters one Step includes:

Traversal is currently at each little base station of opening, determines whether there is current transmitting for arbitrary little base station Performance number is not more than P_M/M-P_MThe little base station of/(M+1)；If it is, notify that this little base station is closed；Otherwise, Notify that transmitting power is turned down P by this little base station_M/M-P_M/(M+1)。

Method the most according to claim 1, it is characterised in that described notice is currently at closed mode Described little base station open after, described method farther includes:

Described macro base station receive that the new little base station opened reports with path loss between adjacent little base station time, determine that this is new The little base station opened is to the minimum path loss PL in the path loss of adjacent little base station_min, work as PL_minNot less than presetting road Damage threshold value PL_thTime, notify that transmitting power is heightened PL by the little base station of this new unlatching_th/PL_min；Otherwise, notice Transmitting power is turned down PL by the little base station of this new unlatching_min/PL_th。

Method the most according to claim 3, it is characterised in that

Described work as PL_minNot less than presetting path loss threshold value PL_thConstantly, described method farther includes:

Determine that the little base station transmitting power of this new unlatching heightens PL_th/PL_minAfterwards, the little base station of this new unlatching Whether launch power more than PL_th, if it is, notify that transmitting power is heightened to PL by the little base station of this new unlatching_th； Otherwise, notify that transmitting power is heightened PL by the little base station of this new unlatching_th/PL_min；

Work as PL_minLess than PL_thTime, described method farther includes:

Determine that whether the transmitting power of little base station of this new unlatching is more than PL_min/PL_th, if it is, notify that this is new Transmitting power is turned down PL by the little base station opened_min/PL_th；Otherwise, notify that the little base station of this new unlatching is closed.

Method the most according to claim 1, it is characterised in that described method farther includes:

When needing to open the little base station that is currently at closed mode, it is in unlatching shape if there is currently no The little base station of state, then notice needs the described little base station opened to open, and with default upper limit of emission power threshold value Launch signal.

6. according to the method described in claim 1-5 any one, it is characterised in that described method is further Including:

When needing to close the little base station that is currently at opening, determine and will be currently at opening The value that each little base station transmitting power is heightened is P_Q/(Q-1)-P_Q/ Q, and notify to be currently at opening and not Need the little base station closed that transmitting power is heightened P_Q/(Q-1)-P_Q/Q；Wherein, Q is for being currently at unlatching The number of the little base station of state, P_QFor when the sum launching power of the little base station of top n, Q is little more than 0 Integer in N；

And notify to need the little base station closed to close.

Method the most according to claim 6, it is characterised in that described determine and will be currently at unlatching shape The value that each little base station transmitting power of state is heightened is P_Q/(Q-1)-P_QDuring/Q, described method farther includes:

Traversal is currently at each little base station of opening, determines this little base station transmitting power for arbitrary little base station Heighten P_Q/(Q-1)-P_QAfter/Q, whether the transmitting power of this little base station is more than presetting upper limit of emission power threshold Value, if time, notify that transmitting power is heightened default upper limit of emission power threshold value by this little base station；Otherwise, Notify that transmitting power is heightened P by this little base station_Q/(Q-1)-P_Q/Q。