Method of controlling radiated power

FIELD: information technology.

SUBSTANCE: based on the method used in a wireless communication system (WiMAX), where in order to identify a transmitter with a receiver, the most probable successful radiated power (C) is calculated in order to provide faster identification of the transmitter by the receiver, a method is disclosed which, based on the calculated radiated power, the allowable maximum (D) and allowable minimum (E) radiated power is given. In that case, at the initial moment, radiated power (G) is controlled, which is less than the calculated radiated power (C) and higher than the given allowable minimum radiated power (E). The radiated power is then increased in form of steps (F) gradually until attaining given allowable maximum radiated power (D). Upon attaining the given allowable maximum radiated power (D), the radiated power is gradually increased in form of steps (F) from the given allowable minimum radiated power (E) to the given allowable maximum radiated power and further until the transmitter is identified or when no additional operations are performed.

EFFECT: high accuracy of identifying a transmitter.

10 cl, 1 dwg

 

The invention relates to a method of adjusting output according to the restrictive part of claim 1 of the claims.

Known wireless communication system is called in English "Wireless Communicationsystem (Wi-MAX). This system works, for example, based on the IEEE 802.16d.

This system operates, for example, in the area between the terminal of the transmitter and base station as a receiver, between which is located an air interface.

Communication is carried out only if the terminal is recognized by the base station, i.e. if the radiated power of the terminal is large enough to recognize the terminal base station, however, this radiated power is not so great that occurred paramodulation this station.

Additionally it should be noted that when the communication in the opposite direction can be used the same functional principle, and in this case, just swap the functions of transmission and reception.

In the initialization phase in the cycle synchronization in wireless communication system radiated power is set such that the terminal is recognized by the base station.

Thus radiated power of the terminal is defined by linearly increasing function and check the various adjustments to the ex long while the terminal is not recognized by the base station.

This method has the disadvantage that the search can sometimes take a lot of time.

The present invention is the technical improvement of the above method so that the period of time until the proper adjustment of the radiated power of the transmitter could be, at least statistically reduced so that the corresponding receiver was able to recognize or accept the transmitter.

The specified task according to the invention is solved by a method, the characteristics of which are given in the characterizing part of claim 1 of the claims.

In accordance with this method includes the operation, during which time on the basis of the estimated most likely successful radiated power are the maximum and minimum allowable radiated power. A subsequent operation, in the initial moment of the transmitter specifies in this case, the radiated power, which lies below the expected level and above the specified minimum power output. After that, the transmitter increases gradually in stages of the radiated power to reach a given maximum radiated power. Then when the transmitter is given the maximum radiated power is proishodit in the stages of the gradual increase in transmitter radiated power from the established minimum radiated power to a predetermined maximum radiated power. This process is repeated every time when the desired maximum radiated power. If the transmitter is ultimately recognized by the receiver, the transmitter with the updated adjustment radiated power comes into work mode.

By setting the minimum and maximum radiated power in the region estimated the most likely successful radiated power is provided by a position in which there is no overmodulation of the receiver and does not require the overhead of checking small radiated power.

The choice of the initial index radiated power below the estimated most likely successful radiated power above the specified minimum radiated power, takes into account the fact that there might be a so-called sinking as a result of which the attenuation in free space or attenuation of the air interface can be calculated too high.

If in the end, the initial power level will be too low, on the basis of this power radiated power will increase at each iteration by a specified amount.

When the desired maximum radiated power of the transmitter will again increase based on a specified minimum radiated power radiation is emuu power in the form of steps until until the transmitter is not recognized by the receiver.

The advantage of this method is that, at least statistically for a shorter time than before, there is a recognition of the transmitter by the receiver in the above system.

Optimal embodiments of the invention are given in the dependent points of his formula.

Accordingly, upon reaching the specified maximum radiated power is an operation in which again calculates the most likely successful radiated power. In this case, the following additional operations with the newly designed, most likely a good emitted power, and choice continue to use either the specified minimum radiated power or radiated power, which is lower than the newly calculated the most likely successful radiated power above the specified minimum power output.

The advantage is the fact that as a result it is possible to continuously adapt to the newly changed conditions.

According to another optimal execution of the invention with a corresponding new calculation of the most likely successful radiated power also re-set the minimum and maximum power output.

When this advantage is is in the result, we can provide the best adaptation to the newly changed conditions.

According to another optimal execution of the invention the method according to the invention is used in the system, known as wireless communication systems (WiMAX), which calculates the most likely successful radiated power (PTX IR MAX), which ideally can be used in the method according to the invention.

Finally, in yet another optimal embodiment of the invention it is checked, at least during a single inter-process synchronization providing an alarm when the transmitter is not recognized by the receiver within a specified period of time. As a result, in this case, the recognition process that runs on the possibility to continuously and actively, or just running process may be interrupted immediately or at a later point.

Below more illustrated example implementation of the invention with reference to the drawing.

The drawing shows a possible process for adjusting the radiated power of the transmitter at the initialization phase in a wireless communication system in which the receiver attempts to recognize the transmitter.

Here is shown the coordinate system a/b, in which the axis of abscissa And applied left-to-right operation iteration. Axis about which dinate In a coordinate system drawn on the basis of the zero line 0, the corresponding estimated, the most likely successful radiated power (PTX IR MAXdepending on the calculation, the most likely successful radiated power, in the positive direction defined maximum radiated power at a distance D and in the negative direction specified minimum radiated power at a distance that is At the same time during a single operation of the iteration there is a change of power with iterative adjustment of the radiated power, respectively, on the value of F.

As shown in the drawing, the adjustment of the output begins with a value which lies below the estimated most likely successful radiated power and at the same time above a given minimum radiated power that is the difference of G can be designated as the initial inverse operation.

Then gradually increase the radiated power until, until it reaches the specified maximum permissible radiated power D.

After that, as shown in the drawing, the adjustment continue using the specified minimum radiated power that is

The transmitter is either recognized in advance that usually happens because this event is focused on the settlement, the most likely successful radiated power, or PR is a process of recognition, or simply proceeding process due to lack of time is interrupted, or recalculated the most likely successful radiated power and, with this new the most likely successful radiated power continues the use of the method or he resumed.

1. The adjustment method of the radiated power of the transmitter in such a manner that a receiving transmitter-receiver, which includes the operation that calculates the most likely successful radiated power, and the operation in which the receiver reports the reception of the transmitter, characterized in that on the basis of the calculated radiated power (C) are the maximum (D) and the minimum (E) radiated power that the transmitter sets the initial radiated power (G), which lies below the calculated radiated power (S) and above the specified minimum radiated power (E), which then the transmitter increases in steps (F) gradually radiated power to reach a given maximum radiated power (D)that upon reaching a given maximum radiated power (D) the transmitter increases gradually in steps (F) radiated power from the predetermined permissible minimum radiated power (E) to a predetermined maximum allowable radiated power (D) and repeats this process every time to the achieving the specified maximum permissible radiated power (D) and that the transmitter when the updated setting radiated power is put into an operating mode in case when the receiver reports the reception of the transmitter.

2. The method according to claim 1, characterized in that upon reaching a given maximum radiated power (D) is an operation in which again calculates the most likely successful radiated power (C) and which then continue to perform additional operations on the new calculation of the radiated power (C) selectively together with the specified minimum radiated power (E) or radiated power below the newly calculated radiated power (C) or above a given minimum radiated power (E).

3. The method according to claim 2, characterized in that under the new calculation of the radiated power (C) newly defined maximum (D) and minimum (E) radiated power.

4. The method according to claim 1, characterized in that it is used in a wireless communication system (WiMAX), which count the most likely successful radiated power (S).

5. The method according to claim 2, characterized in that it is used in a wireless communication system (WiMAX), which count the most likely successful radiated power (S).

6. The method according to claim 3, characterized in that it is used in a wireless communication system (WiMAX), which count the most likely successful radiated power (S).

7. JV the property according to claim 1, characterized in that at least during one of the intermediate operation check synchronization forming a control signal in the case when during a specified interval of time the transmitter is not recognized by the receiver, which is used to terminate the active process of recognition or leaking process immediately or at a later point.

8. The method according to claim 2, characterized in that at least during one of the intermediate operation check synchronization forming a control signal in the case when during a specified interval of time the transmitter is not recognized by the receiver, which is used to terminate the active process of recognition or leaking process immediately or at a later point.

9. The method according to claim 3, characterized in that at least during one of the intermediate operation check synchronization forming a control signal in the case when during a specified interval of time the transmitter is not recognized by the receiver, which is used to terminate the active process of recognition or leaking process immediately or at a later point.

10. The method according to claims 4 to 6, characterized in that at least during one of the intermediate operation check synchronization forming a control signal in the beam, when within a specified period of time the transmitter is not recognized by the receiver, which is used to terminate the active process of recognition or leaking process immediately or at a later point.



 

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