JP3362769B2 - Lamping signal setting method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ramping signal setting method for generating a ramping signal, and more particularly to GSM (Global).
The present invention relates to a ramping signal setting method that is advantageously applied to mobile communication terminals such as System for Mobile Communication).

[0002]

2. Description of the Related Art In GSM, for example, the system is such that the transmission power level of a mobile communication terminal (DCS1800) in the 1800 MHz band is controlled in 16 steps according to the distance from a base station. This means that when a signal is transmitted from a mobile communication terminal with the same transmission power regardless of the distance to the base station, the transmission of the terminal located near the base station interferes with the transmission of the terminal located far from the base station. This is because it will end up. Therefore, in GSM, control information of the transmission power control level (PCL) is sent from the base station to the mobile communication terminal, and the mobile communication terminal transmits signals with the transmission power based on this control information. .

In GSM mobile communication, the rising waveform and the falling waveform of a transmission wave are determined by a ramping signal. FIG. 2 is a waveform diagram showing the waveform of the ramping signal specified by GSM. The GSM mobile communication terminal must control the variable gain element in the transmitter circuit based on the control information from the base station to perform transmission with a ramping signal within the regulation. This ramping signal determines the transmission power and its value does not change with time (1) The transmission power determination value, and the ramping characteristic of the rising edge that changes with time is determined (2) The ramp-up data and the ramping characteristic of the falling edge are determined (3) Consists of ramp down data. The effective transmission period to the base station is performed in the period (1) where the value does not change with time.

In such a ramping signal, the transmission must be carried out at each of 16 predetermined power levels as described above, and the ramp-up data and the ramp-down data are also output exceeding the GSM standard template. There is a strict rule that it should not be.
On the other hand, in the mobile communication terminal, the variation of the element varies from terminal to terminal, so that it is necessary to finely adjust the transmission power at the time of shipment.

This is because even if the transmission power is set in 16 steps from "0" to "15" by default data,
This is because the transmission power determination value, the ramp-up data, and the ramp-down data value at each stage may not be within a predetermined value or within the range due to variations in elements of the terminal. Therefore, before shipment, the transmission power of a predetermined high-frequency signal (RF signal) by the ramping signal is measured by a measuring device so that the predetermined transmission power can be obtained.
I had to tweak the default data.

FIG. 3 shows a flowchart for setting ramping data (TXPWR, RAMPUP, RAMPDN) in the prior art. Data of a default value (default) for generating a ramping signal at each transmission power in 16 steps from "0" to "15" is preset in the mobile communication terminal.
Hereinafter, the ramping signal setting process in the conventional technique will be described with reference to FIG.

In adjusting the ramping signal, first, the change amount (defpwr) for increasing or decreasing the default value and the transmission power control level count value (pcout) are initialized to "0" (S300). Next, the ramping signal when the transmission power control level is "0" is calculated (S3).
02). The ramping signal calculated in step S302 is set (S304), and a high frequency (RF) signal with a transmission power control level of "0" is transmitted from the mobile communication terminal. The transmission power of the transmitted high frequency (RF) signal is measured (S3
06), if it is out of the standard, the default value (default)
t) is decreased or increased (S308 to S312), steps S302 to S304 are executed, and the transmission power is measured again.

As a result, if the transmission power is within the standard, it is next confirmed whether the ramp-up and ramp-down ramping characteristics conform to the GSM standard template. If the template does not meet the specifications, readjust the ramp-up data and ramp-down data, and check the ramping characteristics again. If the standard is satisfied by the process of step S316, the transmission power control level is "0".
The adjustment of the ramping signal at is ended. Step S
318 and S320, the above steps S302-
All ramping signals are set by repeating the process of S316 for the transmission power control levels of "1" to "15".

[0009]

However, such a ramping signal setting method in the prior art has a problem that it takes a very long time to adjust the data. That is, in the conventional technique shown in FIG. 3, the ramp-up and ramp-down data is adjusted by the same amount of increase / decrease as the transmission power. Therefore, the ramp-up and ramp-down ramping characteristics may not be included in the GSM standard template shown in FIG. Therefore, an optimum ramping signal that does not exceed the transmission power shown by 40a in FIG. 4 is obtained in step S302 in FIG.
After setting by the ramping signal setting process (a) of S312 to S312, the ramp up data and the ramp down data 40b and 40c are processed by the ramp up and ramp down data readjustment process (b) of steps S314 to S316.
It was necessary to readjust it so that it would not exceed the value indicated by.

The values of such ramp-up data and ramp-down data are determined for each time divided into, for example, "0" to "15", so that these readjustments are "0" to "15". Must be done every hour divided into That is, the power level at the time of the ramp-up time “0” output by the ramp-up data is monitored, and this value exceeds the value shown at the time “0” of the GSM standard template shown in 40b of FIG. Check if it is not, and if it is, adjust so that the ramp-up data of time "0" is not exceeded.

Similarly, for the ramp-down data, the ramp-down data for each time divided into times "0" to "15" is adjusted. That is, the power level at the time of the ramp-down time “0” output by the ramp-down data is monitored, and this value is compared with the value shown at the time “0” of the GSM standard template shown in 40c of FIG. Check if it does not exceed, and if it does, adjust so that the ramp-down data at time "0" is not exceeded. As described above, the ramp-up and ramp-down data readjustment processing (b) in FIG. 3 must be adjusted 32 times in total for each transmission power control level, which is far more than the ramping signal setting processing (a). It was a time-consuming task.

An object of the present invention is to solve the problems of the prior art and to provide a ramping signal setting method that does not require readjustment of ramp-up and ramp-down data. Further, the present invention provides a ramping signal setting method in which the ramping signal having another transmission power level is set based on the ramping signal having the already determined transmission power level to further improve the efficiency of the ramping signal setting. With the goal.

[0013]

In order to solve the above problems, the present invention monitors whether or not a predetermined radio frequency (RF) signal corresponding to each transmission power control level is output, and the result of this monitoring is monitored. The ramping signal including the transmission power determination value, the ramp-up data and the ramp-down data is adjusted based on
F) The ramping signal setting method for setting the ramping signal for outputting the signal performs the following processing. That is, first, as a result of monitoring the transmission power of a predetermined high-frequency signal corresponding to the transmission power control level, when the predetermined transmission power is not obtained, the amount of change for adjusting the transmission power determination value is changed,
This change amount, a preset default value, and a ratio constant for the transmission power determination value are arithmetically processed to obtain the transmission power determination value. Then, the transmission power is monitored again based on the obtained transmission power determination value, and as a result, if the predetermined transmission power is not obtained, the change amount is changed again and the above processing is executed. On the other hand, when the predetermined transmission power is obtained, the preset value preset as the ramp-up data, the ramp-up data ratio constant set for each time of this ramp-up, and the above-described amount of change are calculated. To obtain the ramp-up data. Further, the default value set in advance as the ramp-down data, the ramp-down data ratio constant set for each time of the ramp-down, and the above-mentioned change amount are arithmetically processed to obtain the ramp-down data. The ramp-up ratio constant and the ramp-down ratio constant are ramp-up data and ramp-down signal according to the ramp-up data and the ramp-down data obtained by the preset amount and the change amount when determining the transmission power determination value, It is set to a ratio constant that does not exceed a predetermined power level at each time.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a ramping signal setting method according to the present invention will be described in detail with reference to the accompanying drawings. FIG. 5 is a functional block diagram showing an embodiment of a ramping signal setting method according to the present invention. In FIG.
The mobile communication terminal 50 is a communication terminal such as a GSM mobile phone, and includes a nonvolatile memory 50a such as an E ² PROM that stores a ramping signal.

The measuring device 52 is a measuring device for measuring the transmission power of a predetermined high frequency signal (RF signal) by the ramping signal of the mobile communication terminal 50. The measuring device 52 is connected to the communication terminal 50.
When connected to the output side of a duplexer (not shown), the radio frequency (RF) signal output from the duplexer to the antenna 50b of the communication terminal 50 is input to the measuring instrument 52 by a changeover switch (not shown) in the terminal 50. To be done.

The personal computer 54 is a computer that operates according to the operation of the coordinator who adjusts the ramping signal and sets the ramping signal.
That is, the personal computer 54 controls the communication terminal 50 to send a radio frequency (RF) signal corresponding to the corresponding transmission power control level to the measuring instrument 52 when the operation for instructing the output of the ramping signal is input from the coordinator. The personal computer 54 also rewrites the ramping signal stored in the memory 50a into the input correction value when the ramping signal is corrected by the coordinator. Furthermore, in the present embodiment, the personal computer 54 adjusts the ramp-up and ramp-down ramping characteristics to values that conform to the GSM standard template shown in FIG. 4 simply by adjusting the transmission power determination values. Is programmed to.

That is, in the present embodiment, the ramp-up and ramp-down data are not adjusted by the same amount of increase and decrease as the amount of change from the default value for adjusting the transmission power determination value as in the prior art, but the ramp-up and ramp-down data are adjusted. By using a ramp rate (RAMPRATE) corresponding to each time of ramp-down “0” to “15”,
The work of readjustment while checking these ramping characteristics is omitted.

FIG. 1 is a flow chart showing an embodiment of a ramping signal setting method according to the present invention. at first,
Amount of change when calculating the ramping signal (defpwr)
And the transmission power control level (pcont) is initialized to "0", which has the highest transmission power control level (S10).
0). Next, the ramping data is calculated (S10
2) First, the ramping signal (TXPWR = default, RAMPUP =) of the default value (default) of the mobile communication terminal 50 (see FIG. 5) whose change amount is “0”.
The default and RAMPDN = default are set (S104). Then, a high frequency signal corresponding to the transmission power control level 0 by the ramping signal having the default value is output to the measuring instrument 52, and it is determined whether the transmission power level of this signal is within the standard or out of the standard (S106).

If the result of determination in step S106 is that it is out of standard, it is determined whether the transmission power level is higher or lower than the standard value (S106). If the transmission power level is higher than the standard value, defpwr = defpw
r-xx is executed to set the change amount to a value reduced by xx (S108). On the other hand, when the transmission power level is smaller than the standard value, defpwr = defpwr + xx is executed to set the change amount to a value increased by xx (S110), and a ramping signal is newly added based on the change amount thus changed. Is calculated in step S102.

Specifically, TXPWR (transmission power determination value) = default + de
fpwr * PWRRATE RAMPUP = default + defpwr * RAM
PRATE RAM PDN = default + defpwr * RAM
PRATE PWRRATE: Ratio constant for transmission power determination value PWRRATE of RAMPUP: Ramp-up ratio constant PWRRATE of RAMPDN: Ramp-down ratio constant is executed.

6 and 7 show TX in the above equation.
PWRRATE of PWR, RAMPRA of RAMPUP
An example of RAMPRATE of TE and RAMPDN is shown, respectively. That is, the PW of TXPWR is shown in FIG.
RRATE is shown, and the PWRR with the transmission power control level (PCL) that outputs the lowest transmission power is "15"
Transmission power control level (PCL) that outputs the highest transmission power from ATE is shown up to PWRRATE with "0". In the processing flow of FIG. 1, pco
When nt is “0”, PCWR shown in FIG. 6 is PWRRATE of “0”, and when pcont is “1”, PC is
L is "1" for PWRRATE ,. ． ． , Pcont is “15”, PCL is “15” PWRRATE
Apply respectively.

Further, FIG. 7 shows a 16-step RAMPRATE for each time from "0" to "15" of ramp-up (RAMPUP) and ramp-down (RAMPDN) when the transmission power control level is "0". It is shown.
In FIG. 7, the numerical values corresponding to RAMPUP0 to RAMPUP15 are “RAMPUP = default + def”.
It is applied to the RAMPRATE of "pwr * RAMPRATE" and the numerical value corresponding to RAMPDN0 to RAMPUP15 is "RAMPDN = default + defpwr *"
It is applied to the RAMPRATE of "RAMPRATE".

RAMPUP0 to RAMPUP15 of FIG.
Then, as the numerical value (“0” to “15”) becomes higher, the transmission power level becomes higher, and RAMPDN0 to RAMP
In DN15, the transmission power level decreases as the numerical value (“0” to “15”) increases. Therefore, in the ramp-up, the transmission power level gradually increases as it changes from “0” to “15”, and in the ramp-down, the transmission power level gradually decreases as it changes from “0” to “15”. Become.

The RAMPRATE shown in FIG. 7 is a RAMPRATE when the transmission power control level is "0", and the transmission power control level from "1" to "15" is also used for experiments and the like. More suitable RAM
PRATE is similarly set. As described above, the personal computer 54 shown in FIG.
PWR in the ramping signal calculation process executed in 02.
Since RATE and RAMPRATE are set in detail based on experimental data and the like, there is no need to confirm the ramping characteristics after setting the transmission power level and readjust the ramp-up and ramp-down data as in the prior art. .

Returning to FIG. 1, when the ramping signal calculation process is completed in step S102, the ramping signal is set again (S104), and the transmission power is measured (S).
106). As a result, if the transmission power is within the standard, it is determined whether the transmission power control level (pcont) is "15" (S112), and if pcont is not "15", pc
ont = pcont + 1 is executed (S114), and the process c of steps S102 to S110 is executed.
In this way, the transmission power control level is changed from "0" to "1".
5 ”is repeated, and the process ends when pcont becomes“ 15. ”Thus, in the embodiment shown in FIG. 1, the transmission powers at the transmission power control levels“ 0 ”to“ 15 ”are measured. , The ramping signal is set so that a predetermined high frequency signal is output.

FIG. 8 is an explanatory view showing another embodiment of the ramping signal setting method according to the present invention. In this embodiment, the transmission power control levels “0” to “15” are not measured to set the ramping signal, but some (4 in this example) actual measurement values are used. The ramping signal at the transmission power control levels "0" to "15" is set. FIG. 9 is a table showing transmission power decision values corresponding to transmission power control levels (PCN) in GSM, and FIG. 10 shows the transmission power control levels shown in FIG. 9 on the horizontal axis and the transmission power decision values on the vertical axis. It is a graph of when.

Here, the transmission power decision value is 9 bits (0 to 0).
511), and the transmission power changes depending on this value (the larger the value, the larger the transmission power).

The numerical values "15" to "0" of the transmission power control level (PCN) shown in FIG. 10 correspond to the numerical values "15" to "" of the transmission power control level (pcont) shown in FIG. 8, respectively. Corresponds to 0 ".

Returning to FIG. 10, although this curve is a non-linear curve, sections (d), (e), indicated by broken line arrows,
In (f) and (g), the transition is almost linear. Therefore,
By measuring the transmission power of one of the sections (d), (e), (f) and (g), the other transmission power can be predicted based on this value. In FIG. 8, the transmission power control level (p
cont) is “0”, “5”, “10”, “15”, that is, the transmission power control level in FIG. 10 is “0”,
The transmission power at "5", "10", and "15" is actually measured, and in other cases, the transmission power is calculated based on these actually measured results.

That is, pcont = 1 and pcon
t = 2 is calculated from the actual measurement result of pcont = 0, and pco
nt = 3, pcont = 4, pcont = 6, and pcont = 7 are calculated from the actual measurement results of pcont = 5, and pcont = 8, pcont = 9, and pcont
= 11 and pcont = 12 are calculated from the actual measurement results of pcont = 10, and pcont = 13 and pcont
= 14 is calculated from the actual measurement result of pcont = 15.

Specifically, for example, in the case of pcont = 1, as shown in FIG. 8, the change amount defpwr0 obtained by the actual measurement at pcont = 0 is shown in PWRRATE (of PCL = 1 shown in FIG. = 1.0) is multiplied, and the value obtained by adding the default value of PCL = 1 to PCL
= 1 as transmission power data (TXPWR).
Other transmission power data is also calculated by the formula shown in TXPWR in FIG.

As described above, in the embodiment shown in FIG.
It is possible to set all ramping signals without actually measuring all the transmission power. Therefore, it is possible to further shorten the ramping signal setting time as compared with the embodiment shown in FIG.

[0033]

As described above, according to the ramping signal setting method of the present invention, it is possible to set the ramping signal accurately in a very short time as compared with the prior art. Therefore, the number of man-hours on the production line can be reduced.

[Brief description of drawings]

FIG. 1 is a flowchart showing an embodiment of a ramping signal setting method according to the present invention.

FIG. 2 is a waveform diagram of a ramping signal including a transmission power determination value, ramp-up data, and ramp-down data.

FIG. 3 is a flowchart of a ramping signal setting method in the related art.

FIG. 4 is a template diagram showing a GSM standard template.

FIG. 5 is a schematic diagram of a test system for implementing the ramping signal setting method according to the present invention.

FIG. 6 is a correspondence diagram showing the value of PWRATE for each transmission power control level.

FIG. 7 is a RAMPRA at each ramp-up and ramp-down time when the transmission power control level is “0”.
The corresponding figure which shows the value of TE.

FIG. 8 is an explanatory diagram showing another embodiment of a ramping signal setting method according to the present invention.

FIG. 9 is a diagram showing transmission power determination values corresponding to transmission power control levels in GSM.

10 is a graph in which the horizontal axis represents the transmission power control level shown in FIG. 9 and the vertical axis represents the transmission power determination value.

[Explanation of symbols]

50 mobile communication terminals 52 Measuring instrument 54 personal computer

Claims (7)

(57) [Claims] 1. A monitor for whether or not a predetermined radio frequency (RF) signal corresponding to each transmission power control level is output, and a transmission power determination value, ramp-up data, and ramp-down data are included based on this monitoring result. By adjusting the ramping signal, the predetermined high frequency (R
F) In the ramping signal setting method for setting the ramping signal for outputting a signal, when the predetermined transmission power cannot be obtained as a result of monitoring the transmission power of a predetermined high frequency signal corresponding to the transmission power control level, The amount of change for adjusting the transmission power determination value is changed, the transmission power determination value is obtained by calculating the amount of change, a preset default value, and a ratio constant for the transmission power determination value, and the obtained transmission The transmission power is monitored again based on the power determination value. As a result, if the predetermined transmission power is not obtained, the amount of change is changed again and the above process is executed, and if the predetermined transmission power is obtained, Is a default value preset as the ramp-up data, a ramp-up data ratio constant set for each time of the ramp-up, and the change amount. The arithmetic processing is performed to obtain the ramp-up data, and the default value preset as the ramp-down data, the ramp-down data ratio constant set for each time of the ramp-down, and the variation are calculated. Obtaining the ramp-down data, the ramp-up ratio constant and the ramp-down ratio constant, the ramp-up data and the ramp obtained by the preset default value and the change amount when determining the transmission power determination value A ramping signal setting method, characterized in that the ramp-up and ramp-down signals based on the down data are set to ratio constants that do not exceed a predetermined power level at each time. 2. The ramping signal setting method according to claim 1, wherein each of the ramp-up time and the ramp-down time is divided into 16, and the ramp-up ratio constant and the ramp-down ratio constant are respectively set for each time. A ramping signal setting method characterized by being set. 3. The ramping signal setting method according to claim 1, wherein the ratio constant for the transmission power determination value, the ramp-up ratio constant, and the ramp-down ratio constant are the transmission power control levels divided into several stages. A ramping signal setting method, which is set for each. 4. The ramping signal setting method according to claim 1, wherein the transmission power control level is divided into several stages, and other transmission powers already determined when obtaining the transmission power determination value in the several stages. The ramping signal is monitored without monitoring all the transmission powers by arithmetically processing the change amount of the determined value, a preset default value, and a ratio constant preset corresponding to the transmission power control level. A ramping signal setting method characterized in that 5. The ramping signal setting method according to claim 4, wherein at least one transmission power control level is monitored from among the transmission power control levels divided into several stages, and a measurement result obtained from this is monitored. A method for setting a ramping signal, characterized by calculating another transmission power determination value and setting a ramping signal. 6. A mobile communication terminal for storing a ramping signal set by the ramping signal setting method according to claim 1, and outputting a high frequency signal by the stored ramping signal to perform wireless communication. 7. The mobile communication terminal according to claim 6, wherein the communication terminal is a GSM terminal.