CN1862986A - Detecting method of closed loop power controlling delay in wireless mobile communication system - Google Patents

Abstract

The invention discloses the closed loop power controlling the delaying time detecting method in the wireless moving communicating system . During the said closed loop power controlling course, the detection is conducted aiming to the real time of the communicating setting of the factory when it realizing concretely. The ascending stepping chain road or the down stepping chain road closed loop power controlling based on the information harass ratio forecasting value, the controlling end setting detects by turns the said controlled end setting to the adoption of the wireless signal transmitting power according to the wireless signal delivered by the controlled end setting, the set of signal is intercepted to send to the said controlled end setting the power controlling order list, the intercepted power controlling order list are compared with the sending power adopting quality list of the said controlled end setting, the maximal different comparing result can be selected form the comparing results of the said time delaying location, and the corresponding time delaying value is served as the time delaying value used by the said information disturbing rate. So the time delaying enacted during the said information disturbing forecasting and the real time delaying of the said communicating setting keep the identical, the ability of the said information disturbing rate forecasting can be assured, so the ability of the said closed loop power controlling can be assured.

Description

The detection method of closed loop power controlling delay in the mobile radio system

(1) technical field

The present invention relates to the signal detecting method in a kind of communication system, more specifically to the detection method of closed power control (Closed Loop Power Control) time delay in a kind of mobile radio system.

(2) background technology

At 3-G (Generation Three mobile communication system) CDMA2000 (Code Division Multiple Access 2000), in WCDMA (Wide band Code Division Multiple Access) and the TD-SCDMA mobile radio systems such as (Time Division-Synchronous CodeDivision Multiple Access), the closed power control procedure is a kind of very important physical layer (Physical Layer or Layer1) process, be used for physical layer transmission process at wireless signal, base station (BS:BaseStation) or subscriber equipment (UE:User Equipment) are according to the variation of wireless propagation environment, use the method for closed-loop control, the power that the subscriber equipment of its opposite end of periodic control or base station adjustment send signal, so that the power of described transmission signal is adapted to the variation of wireless propagation environment, thereby control also reduces in the described system interference level of (Inter-cell) between inside, sub-district (Intra-cell) and sub-district, the work of assurance system stability, increase power system capacity simultaneously, improve systematic function.In described closed power control procedure, by the base station its closed-loop control process that transmission signal power of end user device is controlled is called the control of up link (UL:Uplink) closed power, the closed-loop control process of the transmission signal power of the base station of its opposite end being controlled by subscriber equipment is called the control of down link (DL:Downlink) closed power.

In the physical layer transmission process of wireless signal, the variation of wireless propagation environment comprises changing constantly and the described variation that comes from the interference level of this sub-district or other sub-district of wireless channel decline (Channelfading) characteristic.In order to reflect the variation of described wireless propagation environment, in the closed power control procedure, used the foundation of the measured value of wanted to interfering signal ratio (SIR:Signal to Interference Ratio) as closed power control.In the control of uplink closed loop power, the base station is measured the wanted to interfering signal ratio of described received signal after receiving its uplink wireless signals that end user device is sent; According to the wanted to interfering signal ratio of measuring gained, the base station generates the uplink power control order and it is sent to described subscriber equipment by the downlink wireless signal; Described subscriber equipment is adjusted the transmitted power of described uplink wireless signals according to described uplink power control order.In downlink closed loop control, subscriber equipment is measured the wanted to interfering signal ratio of described received signal after receiving the downlink wireless signal that its base station, opposite end sends; According to the wanted to interfering signal ratio of measuring gained, subscriber equipment generates the descending power control command and it is sent to described base station by uplink wireless signals, and described base station is adjusted the transmitted power of described downlink wireless signal according to described descending power control command.

Because in the closed power control procedure, base station or subscriber equipment receive the moment of described uplink wireless signals or downlink wireless signal, according to described uplink power control order or descending power control command it being sent the moment that signal power adjusts than subscriber equipment or base station always shifts to an earlier date to some extent, the measured value that is described received signal wanted to interfering signal ratio can not really reflect described transmission signal power adjustment wireless propagation environment situation constantly, has therefore further used the predicted value (Prediction) of wanted to interfering signal ratio that described wanted to interfering signal ratio measured value is improved in the closed power control procedure.For example, in the TD-SCDMA 3-G (Generation Three mobile communication system), in Node B (Node B) is controlled its uplink closed loop power that transmission signal power of end user device is controlled, the wanted to interfering signal ratio of current described received signal is at first measured and write down to Node B after receiving its uplink wireless signals that end user device is sent; Then, wanted to interfering signal ratio measured value according to current described received signal, and the wanted to interfering signal ratio measured value of the described received signal that writes down before, Node B sends signal power adjustment wanted to interfering signal ratio constantly to described subscriber equipment and predicts, can use linear prediction (Linear Prediction) algorithm or the prediction algorithm of high-order (Higher Order) more in the forecasting process of described wanted to interfering signal ratio; According to the predicted value of described wanted to interfering signal ratio, Node B generates the uplink power control order and it is sent to described subscriber equipment by the downlink wireless signal; Described subscriber equipment is adjusted the transmitted power of described uplink wireless signals according to described uplink power control order.

In the closed power control procedure, from the base station or subscriber equipment receive the wireless signal that it sends end user device or base station, to the base station or subscriber equipment generate corresponding power control command in view of the above, according to described power control command the power that sends signal is adjusted end user device or base station are corresponding to described again, the time delay of this process will realize relevant with the particular hardware and the software of each producer's communication equipment, for example, in the TD-SCDMA 3-G (Generation Three mobile communication system), the described time delay during the communication equipment specific implementation of each producer is that 1 subframe (Subframe) does not wait to 4 subframes.In above-mentioned closed power control based on the wanted to interfering signal ratio predicted value, the time delay that base station or subscriber equipment set when described wanted to interfering signal ratio is predicted is a fixed value through system configuration, the fixed value of described system configuration can not always be consistent with the real time delay of each communication equipment, because the performance loss of 2dB to 4dB when this inconsistency can be brought the wanted to interfering signal ratio prediction, thereby cause the controlled loss of energy of closed power, therefore in described closed power control, it is one of key factor that guarantees the closed power control performance that the time delay of described setting is consistent with real time delay.But how to detect real time delay is not see in the prior art in the described closed power control.

(3) summary of the invention

The objective of the invention is to propose the detection method of closed loop power controlling delay in a kind of mobile radio system, in described closed power control procedure, postpone the actual time during the communication equipment specific implementation of each producer to detect, be consistent thereby make in the time delay and the real time delay of described communication equipment of carrying out setting when described wanted to interfering signal ratio is predicted, guarantee the performance of described wanted to interfering signal ratio prediction, and then guarantee the performance of described closed power control.

Above-mentioned goal of the invention is to realize by following method: the detection method of closed loop power controlling delay in the mobile radio system is characterized in that: in the uplink closed loop power control based on the wanted to interfering signal ratio predicted value, comprise that step is as follows:

A) according to the uplink wireless signals to the end user device transmission that receives, the base station is detected the adjustment amount of described subscriber equipment to its uplink wireless signals transmitted power successively;

B) one section of base station intercepts its send to the uplink power control command sequence of described subscriber equipment, and the transmitted power adjustment amount sequence at the described subscriber equipment different delay place of the uplink power control command sequence of this intercepting and its detection is compared successively; Comprise at least one described uplink power control order in the described uplink power control command sequence;

C) comparative result with minimum differentiation is chosen in the base station in the comparative result at described each time delay place, and the time delay value that it is corresponding is as the time-delay value that carries out should using when described wanted to interfering signal ratio is predicted.

According to an aspect of the present invention, in described step a), further comprise the steps:

A.1) base station is measured the power P of its described user equipment uplink wireless signal that receives successively _Ul(i), i represents the sequence number of uplink closed loop power control period;

A.2) base station is compared the measured value of former and later two uplink wireless signals received powers of described subscriber equipment successively:

$A_{\mathrm{ul}}\left(i\right)=10\log 10\left[\frac{P_{\mathrm{ul}}\left(i\right)}{P_{\mathrm{ul}}(i-1)}\right];$

A.3) base station is calculated the adjustment amount of described subscriber equipment to its uplink wireless signals transmitted power successively

When | A _Ul(i) |≤Δ _UlThe time, ${\widehat{\mathrm{PC}}}_{\mathrm{ul}}\left(i\right)=A_{\mathrm{ul}}\left(i\right);$ Otherwise, ${\widehat{\mathrm{PC}}}_{\mathrm{ul}}\left(i\right)=\mathrm{sign}\left[A_{\mathrm{ul}}\left(i\right)\right]\·{\mathrm{\Δ}}_{\mathrm{ul}};$ Δ wherein _UlRepresent the power adjustment step-length in the described uplink closed loop power control.

According to an aspect of the present invention, in described step b), when the base station compared in the transmitted power adjustment amount sequence with described uplink power control command sequence and described subscriber equipment different delay place, comparative result was the variance of the difference of the two.

According to an aspect of the present invention, in described step b), when comprising the described uplink power control order of L in the described uplink power control command sequence, L 〉=2, when the base station compared in the transmitted power adjustment amount sequence with described uplink power control command sequence and described subscriber equipment different delay place, the comparative result at described each time delay place was the average of L comparative result in the described sequence.

The detection method of closed loop power controlling delay in the mobile radio system is characterized in that: in the downlink closed loop control based on the wanted to interfering signal ratio predicted value, comprise that step is as follows:

A) the downlink wireless signal that sends according to the base station, opposite end that receives, subscriber equipment detects the adjustment amount of described base station to its downlink wireless signal transmitting power successively;

B) one section of subscriber equipment intercepting its send to the descending power control command sequence of described base station, and the transmitted power adjustment amount sequence at the different delay place, described base station of the descending power control command sequence of this intercepting and its detection is compared successively; Comprise at least one described descending power control command in the described descending power control command sequence;

C) subscriber equipment is chosen the comparative result with minimum differentiation in the comparative result at described each time delay place, and the time delay value that it is corresponding is as the time-delay value that carries out should using when described wanted to interfering signal ratio is predicted.

According to an aspect of the present invention, in described step a), further comprise the steps:

A.1) subscriber equipment is measured the power P of its described base station down link wireless signal that receives successively _Dl(i), i represents the sequence number of downlink closed loop control cycle;

A.2) the subscriber equipment station is compared the measured value of former and later two downlink wireless signal received powers of described base station successively:

$A_{\mathrm{dl}}\left(i\right)=10\log 10\left[\frac{P_{\mathrm{dl}}\left(i\right)}{P_{\mathrm{dl}}(i-1)}\right];$

A.3) subscriber equipment calculates the adjustment amount of described base station to its downlink wireless signal transmitting power successively

When | A _Dl(i) |≤Δ _DlThe time, ${\widehat{\mathrm{PC}}}_{\mathrm{dl}}\left(i\right)=A_{\mathrm{dl}}\left(i\right);$ Otherwise, ${\widehat{\mathrm{PC}}}_{\mathrm{dl}}\left(i\right)=\mathrm{sign}\left[A_{\mathrm{dl}}\left(i\right)\right]\·{\mathrm{\Δ}}_{\mathrm{dl}};$ Δ wherein _DlRepresent the power adjustment step-length in the described downlink closed loop control.

According to an aspect of the present invention, in described step b), when subscriber equipment compared in the transmitted power adjustment amount sequence with described descending power control command sequence and different delay place, described base station, comparative result was the variance of the difference of the two.

According to an aspect of the present invention, in described step b), when comprising the described descending power control command of L in the described descending power control command sequence, L 〉=2, when subscriber equipment compared in the transmitted power adjustment amount sequence with described descending power control command sequence and different delay place, described base station, the comparative result at described each time delay place was the average of L comparative result in the described sequence.

Employed initial time length of delay is by default when according to an aspect of the present invention, carrying out the prediction of described wanted to interfering signal ratio.

According to an aspect of the present invention, described mobile radio system is a 3-G (Generation Three mobile communication system).

(4) specific embodiment

Still be controlled to be example with the closed power based on the wanted to interfering signal ratio predicted value in the described TD-SCDMA 3-G (Generation Three mobile communication system), in Node B is controlled its uplink closed loop power that transmission signal power of end user device is controlled, the step that the method according to this invention, Node B detect described closed loop power controlling delay is as follows:

D) according to the uplink wireless signals to the end user device transmission that receives, Node B detects the adjustment amount of described subscriber equipment to its uplink wireless signals transmitted power successively;

E) one section of Node B intercepting its send to the uplink power control command sequence of described subscriber equipment, and the transmitted power adjustment amount sequence at the described subscriber equipment different delay place of the uplink power control command sequence of this intercepting and its detection is compared successively; Comprise at least one described uplink power control order in the described uplink power control command sequence;

F) Node B is chosen the comparative result with minimum differentiation in the comparative result at described each time delay place, and the time delay value that it is corresponding is as the time-delay value that carries out should using when described wanted to interfering signal ratio is predicted.

According to the determined time delay value of above-mentioned detection step, Node B sends signal power adjustment wanted to interfering signal ratio constantly to described subscriber equipment and predicts; Described wanted to interfering signal ratio can use the metric that those skilled in the art used always (Metric) expressions such as signal power and noise power ratio or signal bit energy and interference power spectrum density ratio; In the forecasting process of described wanted to interfering signal ratio, those skilled in the art can use any existing linear prediction algorithm or the prediction algorithm of high-order more; According to the predicted value of described wanted to interfering signal ratio, Node B generates the uplink power control order and it is sent to described subscriber equipment by the downlink wireless signal; Described subscriber equipment is adjusted the transmitted power of described uplink wireless signals according to described uplink power control order.

In described step a), described Node B further detects the adjustment amount of described subscriber equipment to its uplink wireless signals transmitted power as follows:

A.1) Node B is measured the power P of its described user equipment uplink wireless signal that receives successively _Ul(i), i represents the sequence number of uplink closed loop power control period;

A.2) Node B is compared the measured value of former and later two uplink wireless signals received powers of described subscriber equipment successively:

$A_{\mathrm{ul}}\left(i\right)=10\log 10\left[\frac{P_{\mathrm{ul}}\left(i\right)}{P_{\mathrm{ul}}(i-1)}\right],$ Wherein the common logarithm operation is got in log10 () expression;

A.3) Node B is calculated the adjustment amount of described subscriber equipment to its uplink wireless signals transmitted power successively

When | A _Ul(i) |≤Δ _UlThe time, ${\widehat{\mathrm{PC}}}_{\mathrm{ul}}\left(i\right)=A_{\mathrm{ul}}\left(i\right);$ Otherwise, ${\widehat{\mathrm{PC}}}_{\mathrm{ul}}\left(i\right)=\mathrm{sign}\left[A_{\mathrm{ul}}\left(i\right)\right]\·{\mathrm{\Δ}}_{\mathrm{ul}};$ Wherein symbol manipulation, Δ are got in sign () expression _UlRepresent the power adjustment step-length in the described uplink closed loop power control.

If described Node B is PC based on the uplink power control command sequence of the predicted value generation of described subscriber equipment received signal wanted to interfering signal ratio _Ul(i); An intercepting wherein segment length is the sequence of L, L 〉=1, and described Node B is with described uplink power control command sequence PC _Ul(i) with the transmitted power adjustment amount sequence at described different delay place

Compare s 〉=1 successively; Wherein s represents the minimum signal transmitting element quantity of wireless signal in the physical layer transmission process, and in the TD-SCDMA system, s represents the quantity of subframe, under the hardware and software realization of different communication equipment producer, and common s≤5; Therefore in the present embodiment, establish i=0 ..., L-1; S=1,2,3,4,5; Employed initial time length of delay was by default when described wanted to interfering signal ratio was predicted, the initial time length of delay of setting in the TD-SCDMA system is 2 subframes in the present embodiment.Described PC _Ul(i) with Comparative result adopt the variance (Variance) of the difference of the two to measure; When L 〉=2, described PC _Ul(i) with Comparative result be the mean value of L variance.

In the present embodiment, establish that real time-delay value is 3 subframes in uplink closed loop power described in the TD-SCDMA system control, Δ _Ul=3dB, adopting translational speed in the emulation is the walking wireless channel model of 3km/h.Then get 10,50 and respectively at 100 o'clock, described PC as described L _Ul(i) with

Comparative result respectively as shown in table 1:

Table l

Time-delay value s (subframe)	Variance Var (s) L=10	Variance Var (s) L=50	Variance Var (s) L=100
				l	21.69	13.50	11.78
2	21.03	26.60	26.63
				3	0.46	0.38	0.99
4	20.92	26.68	25.57
				5	23.68	12.75	11.91

By the comparative result shown in the table 1 as can be seen, when s=3, described PC _Ul(i) with Difference have minimum variance yields, also promptly this moment described PC _Ul(i) with The difference minimum, thereby s=3 is by the determined time delay value of detection step in the inventive method, this detected time delay value conforms to real time-delay value in the described uplink closed loop power control.It can also be seen that by the comparative result shown in the table l simultaneously, the different values of L are not remarkable for detecting Effect on Performance, in the present embodiment, when L=10, can obtain reliable result, therefore in the process that realizes, requirement for the buffer area capacity is not high, uses in each producer's communication equipment existing hardware or software unit can realize method of the present invention usually.

In like manner, in the downlink closed loop control that subscriber equipment is controlled the transmission signal power of its peer node B, the method according to this invention, the step that subscriber equipment detects described closed loop power controlling delay is as follows:

1) the downlink wireless signal that sends according to the base station, opposite end that receives, subscriber equipment detects the adjustment amount of described Node B to its downlink wireless signal transmitting power successively;

2) one section of subscriber equipment intercepting its send to the descending power control command sequence of described Node B, and the transmitted power adjustment amount sequence at the described Node B different delay place of the descending power control command sequence of this intercepting and its detection is compared successively; Comprise at least one described descending power control command in the described descending power control command sequence;

3) subscriber equipment is chosen the comparative result with minimum differentiation in the comparative result at described each time delay place, and the time delay value that it is corresponding is as the time-delay value that carries out should using when described wanted to interfering signal ratio is predicted.

Same, in above-mentioned steps 1) in, described subscriber equipment can in further as follows the adjustment amount of described Node B downlink wireless signal transmitting power is detected:

1.1) subscriber equipment measures the power P of its described Node B downlink wireless signal that receives successively _Dl(i), i represents the sequence number of downlink closed loop control cycle;

1.2) the subscriber equipment station compares the measured value of former and later two downlink wireless signal received powers of described Node B successively:

$A_{\mathrm{dl}}\left(i\right)=10\log 10\left[\frac{P_{\mathrm{dl}}\left(i\right)}{P_{\mathrm{dl}}(i-1)}\right];$

1.3) subscriber equipment calculates the adjustment amount of described Node B to its downlink wireless signal transmitting power successively When | A _Dl(i) |≤Δ _DlThe time, ${\widehat{\mathrm{PC}}}_{\mathrm{dl}}\left(i\right)=A_{\mathrm{dl}}\left(i\right);$ Otherwise, ${\widehat{\mathrm{PC}}}_{\mathrm{dl}}\left(i\right)=\mathrm{sign}\left[A_{\mathrm{dl}}\left(i\right)\right]\·{\mathrm{\Δ}}_{\mathrm{dl}};$ Δ wherein _DlRepresent the power adjustment step-length in the described downlink closed loop control.

If described subscriber equipment is PC based on the descending power control command sequence of the predicted value generation of described Node B received signal wanted to interfering signal ratio _Dl(i); An intercepting wherein segment length is the sequence of L, L 〉=1, and described subscriber equipment is with described descending power control command sequence PC _Dl(i) with the transmitted power adjustment amount sequence at described different delay place

Compare s 〉=1 successively; Described PC _Dl(i) with Comparative result adopt the variance of the difference of the two to measure; When L 〉=2, described PC _Dl(i) with

Comparative result be the mean value of L variance; The initial time length of delay that the TD-SCDMA system set when described wanted to interfering signal ratio was predicted is 2 subframes.

Because in described downlink closed loop control, for the restriction of node b apparatus peak signal transmitted power and the consideration of each downlink transmitted signal power-balance, sometimes described Node B may be adjusted the descending power control command that described subscriber equipment sends, thereby in the testing process of described downlink closed loop control time delay, need choose bigger L value to obtain reliable result, those skilled in the art can determine the value of L according to its experience, and the thinking of this and the inventive method is not disagreed.

According to the determined time delay value of above-mentioned detection step, subscriber equipment sends signal power adjustment wanted to interfering signal ratio constantly to described Node B and predicts; According to the predicted value of described wanted to interfering signal ratio, subscriber equipment generates the descending power control command and it is sent to described Node B by uplink wireless signals; Described Node B is adjusted the transmitted power of described downlink wireless signal according to described descending power control command.

Therefore, by method of the present invention illustrated among the above embodiment, postpone to detect the actual time when realizing at the communication equipment of each producer in the described closed power control procedure, make in the time delay and the real time delay of described communication equipment of carrying out setting when described wanted to interfering signal ratio is predicted and be consistent, thereby guarantee the performance of described wanted to interfering signal ratio prediction, and then guarantee the performance of described closed power control.Simultaneously, because the detection step described in the inventive method is finished voluntarily by described Node B or subscriber equipment, do not need extra signaling support, thereby can be in existing mobile radio system, TD-SCDMA 3-G (Generation Three mobile communication system) as in the present embodiment is realized on the basis that does not change its existing signaling system.

Claims (10)

1. the detection method of closed loop power controlling delay in the mobile radio system is characterized in that: in the uplink closed loop power control based on the wanted to interfering signal ratio predicted value, comprise that step is as follows:

A) according to the uplink wireless signals to the end user device transmission that receives, the base station is detected the adjustment amount of described subscriber equipment to its uplink wireless signals transmitted power successively;

B) one section of base station intercepts its send to the uplink power control command sequence of described subscriber equipment, and the transmitted power adjustment amount sequence at the described subscriber equipment different delay place of the uplink power control command sequence of this intercepting and its detection is compared successively; Comprise at least one described uplink power control order in the described uplink power control command sequence;

C) comparative result with minimum differentiation is chosen in the base station in the comparative result at described each time delay place, and the time delay value that it is corresponding is as the time-delay value that carries out should using when described wanted to interfering signal ratio is predicted.

2. the detection method of closed loop power controlling delay in the mobile radio system as claimed in claim 1 is characterized in that further comprising the steps: in described step a)

A.1) base station is measured the power P of its described user equipment uplink wireless signal that receives successively _Ul(i), i represents the sequence number of uplink closed loop power control period;

A.2) base station is compared the measured value of former and later two uplink wireless signals received powers of described subscriber equipment successively:

$A_{\mathrm{ul}}\left(i\right)=10\log 10\left[\frac{P_{\mathrm{ul}}\left(i\right)}{P_{\mathrm{ul}}(i-1)}\right];$

A.3) base station is calculated the adjustment amount of described subscriber equipment to its uplink wireless signals transmitted power successively

When | A _Ul(i) |≤Δ _UlThe time, $\hat{P}{C}_{\mathrm{ul}}\left(i\right)=A_{\mathrm{ul}}\left(i\right);$ Otherwise, $P{\hat{C}}_{\mathrm{ul}}\left(i\right)=\mathrm{sign}\left[A_{\mathrm{ul}}\left(i\right)\right]\·A_{\mathrm{ul}};$ Δ wherein _UlRepresent the power adjustment step-length in the described uplink closed loop power control.

3. the detection method of closed loop power controlling delay in the mobile radio system as claimed in claim 1, it is characterized in that in described step b), when the base station compared in the transmitted power adjustment amount sequence with described uplink power control command sequence and described subscriber equipment different delay place, comparative result was the variance of the difference of the two.

4. as the detection method of closed loop power controlling delay in claim 1 or the 3 described mobile radio systems, it is characterized in that in described step b), when comprising the described uplink power control order of L in the described uplink power control command sequence, L 〉=2, when the base station compared in the transmitted power adjustment amount sequence with described uplink power control command sequence and described subscriber equipment different delay place, the comparative result at described each time delay place was the average of L comparative result in the described sequence.

5. the detection method of closed loop power controlling delay in the mobile radio system is characterized in that: in the downlink closed loop control based on the wanted to interfering signal ratio predicted value, comprise that step is as follows:

A) the downlink wireless signal that sends according to the base station, opposite end that receives, subscriber equipment detects the adjustment amount of described base station to its downlink wireless signal transmitting power successively;

B) one section of subscriber equipment intercepting its send to the descending power control command sequence of described base station, and the transmitted power adjustment amount sequence at the different delay place, described base station of the descending power control command sequence of this intercepting and its detection is compared successively; Comprise at least one described descending power control command in the described descending power control command sequence;

C) subscriber equipment is chosen the comparative result with minimum differentiation in the comparative result at described each time delay place, and the time delay value that it is corresponding is as the time-delay value that carries out should using when described wanted to interfering signal ratio is predicted.

6. the detection method of closed loop power controlling delay in the mobile radio system as claimed in claim 5 is characterized in that further comprising the steps: in described step a)

A.1) subscriber equipment is measured the power P of its described base station down link wireless signal that receives successively _Dl(i), i represents the sequence number of downlink closed loop control cycle;

A.2) the subscriber equipment station is compared the measured value of former and later two downlink wireless signal received powers of described base station successively:

$A_{\mathrm{dl}}\left(i\right)=10\log 10\left[\frac{P_{\mathrm{dl}}\left(i\right)}{P_{\mathrm{dl}}(i-1)}\right];$

A.3) subscriber equipment calculates the adjustment amount of described base station to its downlink wireless signal transmitting power successively When | A _Dl(i)≤Δ _DlThe time, $\hat{P}{C}_{\mathrm{dl}}\left(i\right)=A_{\mathrm{dl}}\left(i\right);$ Otherwise, $P{\hat{C}}_{\mathrm{dl}}\left(i\right)=\mathrm{sign}\left[A_{\mathrm{dl}}\left(i\right)\right]\·{\mathrm{\Δ}}_{\mathrm{dl}};$ Δ wherein _DlRepresent the power adjustment step-length in the described downlink closed loop control.

7. the detection method of closed loop power controlling delay in the mobile radio system as claimed in claim 5, it is characterized in that in described step b), when subscriber equipment compared in the transmitted power adjustment amount sequence with described descending power control command sequence and different delay place, described base station, comparative result was the variance of the difference of the two.

8. as the detection method of closed loop power controlling delay in claim 5 or the 7 described mobile radio systems, it is characterized in that in described step b), when comprising the described descending power control command of L in the described descending power control command sequence, L 〉=2, when subscriber equipment compared in the transmitted power adjustment amount sequence with described descending power control command sequence and different delay place, described base station, the comparative result at described each time delay place was the average of L comparative result in the described sequence.

9. as the detection method of closed loop power controlling delay in claim 1 or the 5 described mobile radio systems, employed initial time length of delay is by default when it is characterized in that carrying out described wanted to interfering signal ratio prediction.

10. as the detection method of closed loop power controlling delay in claim 1 or the 5 described mobile radio systems, it is characterized in that described mobile radio system is a 3-G (Generation Three mobile communication system).