CN101873681A - Method and device for adjusting received target power of PRACH (Physical Random Access Channel) signal - Google Patents
Method and device for adjusting received target power of PRACH (Physical Random Access Channel) signal Download PDFInfo
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Abstract
The application discloses a method for adjusting the received target power of a PRACH (Physical Random Access Channel) signal. The method comprises the following steps of: detecting a received actual power or a signal-noise ratio of an uplink signal carrying preamble within a set time length, and counting a first accumulating time of the valuing of the received actual power or the signal-noise ratio of the uplink signal belonging to the set first interval and a second accumulating time of the valuing belonging to the set second interval within the set time length; calculating ONP or UNP according to the first accumulating time and the second accumulating time; comparing the obtained ONP or UNP with a set threshold, and correspondingly adjusting the valuing of the received target power of the PRACH signal according to the compared result, wherein the first interval and the second interval are respectively used for representing specified network environment states, therefore, the valuing accuracy of the received target power of the PRACH signal is improved, and the network service quality is enhanced. Meanwhile, the invention also discloses a corresponding base station.
Description
Technical field
The application relates to communication system, particularly adjusts the method and the device of signal PRACH signal expectation received power.
Background technology
(Long Term Evolution, LTE) in the system, end side is used Physical Random Access Channel, and (Physical Random Access Channel PRACH) initiates access process at random to network side, to set up up link at existing Long Term Evolution.Each PRACH channel comprises a plurality of leading (preamble) sequence, and terminal is initiated to insert at random if desired, will select one at random from these preamble, and upwards sends by the PRACH channel.
In order to guarantee that the PRACH channel can correctly be detected (guaranteeing that promptly network side has enough signal received power and limit interferences) by network side, need carry out open loop power control to the PRACH channel in end side, so-called open loop power control promptly is meant and does not need interactive information between end side and the network side and according to the quality quality of end side received signal, reduce or increase the method for end side signal transmitting power.When the PRACH channel was carried out open loop power control, the PRACH signal transmitting power of end side calculated by two steps:
1, the MAC layer calculates the expectation received power of PRACH
P
N_PRACH＝P
0_PRACH+(N-1)·Δ
RAcH+Δ
Preamble
Parameter-definition wherein is as follows:
P
N_PRACHIndicate PRACH expectation received power to physical layer for the MAC layer, PREAMBLE_TRANSMISSION_POWER represents with parameter;
P
0_PRACHFor the PRACH signal expectation received power of network side,,, be presented as parameter p reambleInitialReceivedTargetPower by all end side travelling carriages (UE) of broadcast announcement by the network side setting;
N is the cumulative number that PRACH sends, and maximum can not surpass PreambleTransMax, and this parameter is by the network side setting, by all UE of broadcast announcement;
Δ RACH is the climbing step-length of PRACH expectation received power, and for example, 2dB by the network side setting, by all UE of broadcast announcement, is presented as parameter PowerRampingStep;
Δ Preamble is a PRACH expectation received power increment, is defined by related specifications;
2, physical layer is calculated the actual transmission power of PRACH
P
PRACH＝min{P
N?PRACH-PL，P
max}
P
PRACHPRACH signal actual emission power for end side;
PL is the path loss that UE measures;
Pmax is the maximum transmission power of UE, is determined by the UE ability.
The computational methods of the PRACH signal transmitting power by above-mentioned end side as can be seen, network side can be by adjusting power control parameters (being the PRACH signal expectation received power of network side) preambleInitialReceivedTargetPower, control the PRACH signal transmitting power of the end side in the whole sub-district, and then guarantee to insert success rate at random, control interference simultaneously to the adjacent area.
But, in present LTE system, normally use special-purpose planning instrument to carry out pre-configured to the power control parameters of network side in the network planning stage, and in the network operation, by manual mode power control parameters is reconfigured according to network operation situation by administrative staff, this need consume a large amount of time and manpower, has increased the network operation cost greatly; On the other hand, there is hysteresis quality in manually adjustment mode, can not in time adjust power control parameters according to the variation of network environment, and the mode of manually adjusting too relies on administrative staff's personal experience and judgement, and randomness is bigger, makes mistakes easily.Therefore, need customize a kind of technical scheme of adjusting power control parameters again,, improve the accuracy that power control parameters is adjusted to reduce the network operation cost.
Summary of the invention
The embodiment of the present application provides method and the device of adjusting PRACH signal expectation received power, is used for the situation according to offered load, the PRACH signal expectation received power of automatic, real-time adjustment LTE system.
The concrete technical scheme that the embodiment of the present application provides is as follows:
A kind of method of adjusting PRACH signal expectation received power comprises:
In setting duration, the actual reception power or the signal to noise ratio of the upward signal that carries targeting sequencing preamble detected;
The value of statistics actual reception power of upward signal or signal to noise ratio in described setting duration, belong to setting first interval first cumulative number and belong to second cumulative number in second interval of setting; Wherein, it is normal to belong to the described first interval expression upward signal access power, and it is too high to belong to the described second interval expression upward signal access power;
Insert excessive probability ONP according to described first cumulative number and second cumulative number calculating upward signal;
The ONP of acquisition and the threshold value of setting are compared, and the value that physical accidental inserts PRACH signal expectation received power is adjusted accordingly according to comparative result.
A kind of method of adjusting PRACH signal expectation received power comprises:
In setting duration, the actual reception power or the signal to noise ratio of the upward signal that carries targeting sequencing preamble detected;
The value of statistics actual reception power of upward signal or signal to noise ratio in described setting duration, belong to setting first interval first cumulative number and belong to second cumulative number in second interval of setting; Wherein, belong to the described first interval expression and do not have upward signal, belong to the described second interval expression and have upward signal, but its access power is low excessively;
Inserted small probability UNP according to described first cumulative number and second cumulative number calculating upward signal;
The UNP of acquisition and the threshold value of setting are compared, and adjust accordingly according to the value of comparative result to PRACH signal expectation received power.
A kind of base station comprises:
Detecting unit is used in setting duration, and the actual reception power or the signal to noise ratio of the upward signal that carries targeting sequencing preamble detected;
Statistic unit, the value that is used to add up the actual reception power of upward signal or signal to noise ratio in described setting duration, belong to setting first interval first cumulative number and belong to second cumulative number in second interval of setting; Wherein, it is normal to belong to the described first interval expression upward signal access power, and it is too high to belong to the described second interval expression upward signal access power;
Arithmetic element is used for inserting excessive probability ONP according to described first cumulative number and second cumulative number calculating upward signal;
Adjustment unit, the ONP that is used for obtaining compares with the threshold value of setting, and adjusts accordingly according to the value of comparative result to physical accidental access PRACH signal expectation received power.
A kind of base station comprises:
Detecting unit is used in setting duration, and the actual reception power or the signal to noise ratio of the upward signal that carries targeting sequencing preamble detected;
Statistic unit, the value that is used to add up the actual reception power of upward signal or signal to noise ratio in described setting duration, belong to setting first interval first cumulative number and belong to second cumulative number in second interval of setting; Wherein, belong to the described first interval expression and do not have upward signal, belong to the described second interval expression and have upward signal, but its access power is low excessively;
Arithmetic element inserted small probability UNP according to described first cumulative number and second cumulative number calculating upward signal;
Adjustment unit, the UNP that is used to obtain and the threshold value of setting compare, and adjust accordingly according to the value of comparative result to PRACH signal expectation received power.
In the embodiment of the present application, the base station is in setting duration, actual reception power or signal to noise ratio to the upward signal that carries targeting sequencing preamble detect, the actual reception power of statistics upward signal or the value of signal to noise ratio are in described setting duration, belong to setting first interval first cumulative number and belong to second cumulative number in second interval of setting; Insert excessive probability ONP or insert signal gets too small probability UNP according to described first cumulative number and second cumulative number calculating upward signal again; And the ONP that obtains or the threshold value of UNP and setting compared, and the value that physical accidental inserts PRACH signal expectation received power is adjusted accordingly according to comparative result, wherein, described first interval and second interval are respectively applied for the network environment state of expression appointment, like this, just can be according to the network environment real-time change, in time PRACH signal expectation received power preambleInitialReceivedTargetPower is adjusted, thereby improved the accuracy of PRACH signal expectation received power value, guaranteed the access success rate, also effectively avoided interference is caused in the adjacent area, and then promoted network service quality, also reduced the network operation maintenance cost simultaneously.
Description of drawings
Fig. 1 is LTE Solution Architecture figure in the embodiment of the present application;
Fig. 2 is a base station functions structure chart in the embodiment of the present application
Fig. 3 A is the first method flow chart that the base station is adjusted power control parameters in the embodiment of the present application;
Fig. 3 B is that uplink synchronous detection schematic diagram is carried out in the base station in the embodiment of the present application;
The second method flow chart that Fig. 4 adjusts power control parameters for base station in the embodiment of the present application;
Embodiment
In the LTE system, for can be according to the situation of offered load, the PRACH signal expectation received power of automatic, real-time adjustment LTE system provides two kinds of implementation methods in the embodiment of the present application:
First kind of implementation method is: in setting duration, the actual reception power or the signal to noise ratio of the upward signal that carries targeting sequencing preamble detected; The value of statistics actual reception power of upward signal or signal to noise ratio in described setting duration, belong to setting first interval first cumulative number and belong to second cumulative number in second interval of setting; Wherein, it is normal to belong to the described first interval expression upward signal access power, and it is too high to belong to the described second interval expression upward signal access power; Insert excessive probability ONP according to described first cumulative number and second cumulative number calculating upward signal; The ONP of acquisition and the threshold value of setting are compared, and the value that physical accidental inserts PRACH signal expectation received power is adjusted accordingly according to comparative result.
Second method is: in setting duration, the actual reception power or the signal to noise ratio of the upward signal that carries targeting sequencing preamble detected; The value of statistics actual reception power of upward signal or signal to noise ratio in described setting duration, belong to setting first interval first cumulative number and belong to second cumulative number in second interval of setting; Wherein, belong to the described first interval expression and do not have upward signal, belong to the described second interval expression and have upward signal, but its access power is low excessively; Inserted small probability UNP according to described first cumulative number and second cumulative number calculating upward signal; The UNP of acquisition and the threshold value of setting are compared, and adjust accordingly according to the value of comparative result to PRACH signal expectation received power.
Above-mentioned PRACH signal expectation received power promptly is meant PRACH power control parameters preambleInitialReceivedTargetPower, abbreviates power control parameters as.
Below in conjunction with accompanying drawing the preferred embodiment of the present invention is elaborated.
Consult illustrated in figures 1 and 2ly, in the present embodiment, comprise a plurality of base stations 10 and wherein a plurality of in the LTE system, base station 10 comprises detecting unit 100, statistic unit 101, arithmetic element 102 and adjustment unit 103, wherein,
Under first kind of situation:
Detecting unit 100 is used in setting duration, and the actual reception power or the signal to noise ratio of the upward signal that carries targeting sequencing preamble detected;
Statistic unit 101, the value that is used to add up the actual reception power of upward signal or signal to noise ratio in described setting duration, belong to setting first interval first cumulative number and belong to second cumulative number in second interval of setting; Wherein, it is normal to belong to the described first interval expression upward signal access power, and it is too high to belong to the described second interval expression upward signal access power;
Arithmetic element 102 is used for inserting excessive probability ONP according to described first cumulative number and second cumulative number calculating upward signal;
Adjustment unit 103, the ONP that is used for obtaining compares with the threshold value of setting, and adjusts accordingly according to the value of comparative result to physical accidental access PRACH signal expectation received power.
Under second kind of situation:
Detecting unit 100 is used in setting duration, and the actual reception power or the signal to noise ratio of the upward signal that carries targeting sequencing preamble detected;
Statistic unit 101, the value that is used to add up the actual reception power of upward signal or signal to noise ratio in described setting duration, belong to setting first interval first cumulative number and belong to second cumulative number in second interval of setting; Wherein, belong to the described first interval expression and do not have upward signal, belong to the described second interval expression and have upward signal, but its access power is low excessively;
Arithmetic element 102 inserted small probability UNP according to described first cumulative number and second cumulative number calculating upward signal;
Adjustment unit 103, the UNP that is used to obtain and the threshold value of setting compare, and adjust accordingly according to the value of comparative result to PRACH signal expectation received power.
Based on the said system framework, in the present embodiment, to carry out open loop power control by the PRACH channel between a base station 10 and the UE11 is that example describes, so, consult shown in Fig. 3 A, in the present embodiment, base station 10 is as follows according to the detailed process of the first method that the variation of PRACH channel circumstance adjusts accordingly power control parameters:
Step 300: the statistics timer zero setting that will be provided with, each counter zero setting in the present embodiment, is provided with a timer, and four counters are called counter 1, counter 2, counter 3 sum counters 4.
Step 301: network environment is carried out uplink synchronous detect, acquisition is at the detection variable of the upward signal that carries preamble, in the present embodiment, so-called detection variable promptly is meant the signal actual reception power (Pow) or the Signal-to-Noise (SNR) of detected upward signal.
Carry out coherent detection at the PRACH channel position at the upward signal that carries preamble, obtain the relevant detection variable---signal actual reception power (Pow) or Signal-to-Noise (SNR), the value of the value of the signal actual reception power that obtains or Signal-to-Noise and default threshold value (Thre) are compared, know that according to comparative result the value of signal actual reception power or Signal-to-Noise surpass when setting threshold value, determine to exist on this PRACH channel the upward signal that carries preamble; Its concrete operations schematic diagram is shown in Fig. 3 B.
Can infer by above-mentioned detection method, if the parameter value of power control parameters is provided with too small, then the value of base station 10 detected signal actual reception power or Signal-to-Noise will be lower than default thresholding, thereby can not correctly detect the upward signal that carries preamble, if and that the parameter value of power control parameters is provided with is excessive, then will to exceed default threshold value too much for the value of base station 10 detected signal actual reception power or Signal-to-Noise, like this, though can correctly detect the upward signal that carries preamble, but the adjacent area has been produced serious disturbance, therefore, can be by near the distribution situation of value threshold value of detection signal actual reception power or Signal-to-Noise, adjust the value of power control parameters, this technical scheme will describe in detail in following examples.
Step 302:, obtain comparative result with detection variable and pre-conditioned the comparing that obtains.
In the present embodiment, above-mentioned pre-conditioned four intervals that comprise are respectively interval 1:(-∞, Thre-Thre_down], interval 2:(Thre-Thre_down, Thre], interval 3:(Thre, Thre+Thre_up], interval 4:(Thre+Thre_up, + ∞)
Wherein, Thre is default detection threshold value, and Thre_up is decision signal access power when too high, the increment of default detection threshold; Thre_down crosses when low the increment of default detection threshold for the decision signal access power.
Step 303: determine that according to comparative result the value of detection variable falls at interval 1 o'clock, execution in step 304; The value of determining detection variable falls at interval 2 o'clock, execution in step 305; The value of determining detection variable falls at interval 3 o'clock, execution in step 306; The value of determining detection variable falls at interval 4 o'clock, execution in step 307;
Above-mentioned execution in step is specially:
If detection variable＜=Thre-Thre_down determines that then the value of detection variable falls into interval 1; At this moment, base station 10 is judged does not have preamble to insert, and does not promptly have the upward signal that carries preamble, and this moment is detected all to be noise and interference.
If Thre-Thre_down＜detection variable＜=Thre determines that then the value of detection variable falls into interval 2; At this moment, base station 10 judges that the state of decision signal access power is " low excessively ", though i.e. expression has preamble to insert this moment, because the signal access power is low excessively, can not normally detect.
If Thre＜detection variable＜=Thre+Thre_up determines that then the value of detection variable falls into interval 3; At this moment, the state of base station 10 decision signal access powers is " normally ".
If detection variable＞Thre+Thre_up determines that then the value of detection variable falls into interval 4; At this moment, the state of base station decision signal access power is " too high ", though i.e. expression can detect the preamble access this moment, can cause interference to the adjacent area.
Step 304: counter 1 is added 1.Then, execution in step 308.
Step 305: counter 2 is added 1, then, execution in step 308.
Step 307: counter 4 is added 1, then, execution in step 308.
Step 308: judge whether timer is overtime, if then execution in step 309; Otherwise, return step 301.
Step 309: (OverNormalpowerProbability, ONP and signal access power are crossed small probability UnderNormalpowerProbability to the excessive probability of signal calculated access power, UNP).
In the present embodiment, adopt following formula to calculate ONP and UNP:
ONP=counter 4 accumulation numerical value/(counter 3 accumulation numerical value+counters 4 cumulative datas)
UNP=counter 2 accumulation numerical value/(counter 1 accumulation numerical value+counter 2 cumulative datas)
Step 310: with the value and default excessive ratio (the Assumed Proportion of Over Power of signal access power of the ONP that obtains, AP_OP) compare, do you whether judge ONP greater than AP_OP, i.e. ONP＞AP_OP? if then execution in step 311; Otherwise, execution in step 312.
Step 311: power control parameters is reduced by a default downward modulation step-length (Step_Down), return step 300.
Step 312: with the value and default low excessively ratio (the Assumed Proportion of Under Power of signal access power of the UNP that obtains, AP_UP) compare, judge that whether UNP is greater than AP_UP, UNP＞AP_OP? if, then execution in step 313, otherwise, power control parameters is not adjusted, directly return step 300.
Certainly, but also calculate the value of UNP during execution in step 312 again, do not repeat them here.
Step 313: power control parameters is increased a default rise step-length (Step_Up); Then, return step 300.
Based on the foregoing description, in another case, two determining steps that step 309 and step 312 are put down in writing also can be exchanged, do you promptly judge UNP＞AP_UP earlier? ONP＞AP_OP again?, other steps also should adjust accordingly, and consult shown in Figure 4, in the present embodiment, base station 10 is as follows according to the detailed process of the second method that the variation of PRACH channel circumstance adjusts accordingly power control parameters:
Step 400: the statistics timer zero setting that will be provided with, each counter zero setting in the present embodiment, is provided with a timer, and four counters are called counter 1, counter 2, counter 3 sum counters 4.
Step 401: network environment is carried out uplink synchronous detect, acquisition is at the detection variable of the upward signal that carries preamble, in the present embodiment, so-called detection variable promptly is meant the signal actual reception power (Pow) or the Signal-to-Noise (SNR) of detected upward signal.
Step 402:, obtain comparative result with detection variable and pre-conditioned the comparing that obtains.
In the present embodiment, above-mentioned pre-conditioned four intervals that comprise are respectively interval 1:(-∞, Thre-Thre_down], interval 2:(Thre-Thre_down, Thre], interval 3:(Thre, Thre+Thre_up], interval 4:(Thre+Thre_up, + ∞)
Step 403: determine that according to comparative result the value of detection variable falls at interval 1 o'clock, execution in step 404; The value of determining detection variable falls at interval 2 o'clock, execution in step 405; The value of determining detection variable falls at interval 3 o'clock, execution in step 406; The value of determining detection variable falls at interval 4 o'clock, execution in step 407;
Step 404: counter 1 is added 1.Then, execution in step 408.
Step 405: counter 2 is added 1, then, execution in step 408.
Step 407: counter 4 is added 1, then, execution in step 308.
Step 408: judge whether timer is overtime, if then execution in step 409; Otherwise, return step 401.
Step 409: calculate ONP and UNP.
In the present embodiment, still adopt following formula to calculate ONP and UNP:
ONP=counter 4 accumulation numerical value/(counter 3 accumulation numerical value+counters 4 cumulative datas)
UNP=counter 2 accumulation numerical value/(counter 1 accumulation numerical value+counter 2 cumulative datas)
Step 410: the value of the UNP that obtains is compared with default AP_UP, whether judge UNP greater than AP_UP, i.e. UNP＞AP_UP? if then execution in step 411, otherwise execution in step 412.
Step 411: power control parameters is increased a default rise step-length (Step_Up); Then, return step 300 '.
Step 412: the value of the ONP that obtains is compared with default AP_OP, whether judge ONP greater than AP_OP, i.e. ONP＞AP_OP? if, execution in step 313 ' then; Otherwise, power control parameters is not adjusted, directly return step 400.
Certainly, but also calculate the value of ONP during execution in step 412 ' again, do not repeat them here.
Step 413: power control parameters is reduced by a default downward modulation step-length (Step_Down), otherwise, power control parameters is not adjusted, return step 300.
In above-mentioned two embodiment, if operator allows, the adjustment of preambleInitialReceivedTargetPowe can independently be finished in base station side; Otherwise the base station need report O﹠amp to recommended value; M is through O﹠amp; After the M approval, just carry out and adjust action.This recommended value can report to (Operation and Management, O﹠amp by northbound interface; M).
In sum, in the embodiment of the present application, base station 10 is in setting duration, actual reception power or signal to noise ratio to the upward signal that carries preamble detect, the actual reception power of statistics upward signal or the value of signal to noise ratio are in described setting duration, belong to setting first interval first cumulative number and belong to second cumulative number in second interval of setting; Calculate ONP or UNP according to described first cumulative number and second cumulative number again, and the ONP of acquisition or the threshold value of UNP and setting are compared, and adjust accordingly according to the value of comparative result to PRACH signal expectation received power; Wherein, described first interval and second interval are respectively applied for the network environment state of expression appointment.Like this, just can be according to the network environment real-time change, in time PRACH signal expectation received power preambleInitialReceivedTargetPower is adjusted, thereby improved the accuracy of PRACH signal expectation received power value, guaranteed the access success rate, also effectively avoided interference is caused in the adjacent area, and then promoted network service quality, also reduced the network operation maintenance cost simultaneously.
Obviously, those skilled in the art can carry out various changes and modification and the spirit and scope that do not break away from the application to the embodiment among the application.Like this, if these in the embodiment of the present application are revised and modification belongs within the scope of the application's claim and equivalent technologies thereof, then the embodiment among the application also is intended to comprise these changes and modification interior.
Claims (10)
1. a method of adjusting PRACH signal expectation received power is characterized in that, comprising:
In setting duration, the actual reception power or the signal to noise ratio of the upward signal that carries targeting sequencing preamble detected;
The statistics actual reception power of upward signal or the value of signal to noise ratio, in described setting duration, belong to setting first interval first cumulative number and belong to second cumulative number in second interval of setting; Wherein, it is normal to belong to the described first interval expression upward signal access power, and it is too high to belong to the described second interval expression upward signal access power;
Insert excessive probability ONP according to described first cumulative number and second cumulative number calculating upward signal;
The ONP of acquisition and the threshold value of setting are compared, and the value that physical accidental inserts PRACH signal expectation received power is adjusted accordingly according to comparative result.
2. the method for claim 1 is characterized in that, the ONP of acquisition and the threshold value of setting is compared, and adjust accordingly according to the value of comparative result to PRACH signal expectation received power, comprising:
The excessive probability AP_OP of access power with default of the ONP that obtains is compared;
When determining ONP, step-length is set in one of PRACH signal expectation received power downward modulation greater than AP_OP.
3. method as claimed in claim 2 is characterized in that, if determine that ONP is not more than AP_OP, then carries out following operation:
The value of statistics actual reception power of upward signal or signal to noise ratio in described setting duration, belong to setting the 3rd interval the 3rd cumulative number and belong to four-range the 4th cumulative number of setting; Wherein, belong to the described the 3rd interval expression and do not have upward signal, belong to the described the 4th interval expression and have upward signal, but its access power is low excessively;
Inserted small probability UNP according to described the 3rd cumulative number and the 4th cumulative number calculating upward signal;
UNP is crossed low probability AP_UP with default access power to be compared;
When determining UNP, PRACH signal expectation received power is raised one set step-length greater than AP_UP.
4. a method of adjusting PRACH signal expectation received power is characterized in that, comprising:
In setting duration, the actual reception power or the signal to noise ratio of the upward signal that carries targeting sequencing preamble detected;
The statistics actual reception power of upward signal or the value of signal to noise ratio, in described setting duration, belong to setting first interval first cumulative number and belong to second cumulative number in second interval of setting; Wherein, belong to the described first interval expression and do not have upward signal, belong to the described second interval expression and have upward signal, but its access power is low excessively;
Inserted small probability UNP according to described first cumulative number and second cumulative number calculating upward signal;
The UNP of acquisition and the threshold value of setting are compared, and adjust accordingly according to the value of comparative result to PRACH signal expectation received power.
5. method as claimed in claim 4 is characterized in that, the UNP of acquisition and the threshold value of setting is compared, and adjust accordingly according to the value of comparative result to PRACH signal expectation received power, comprising:
The access power with default of the UNP that obtains is crossed small probability AP_UP to be compared;
When determining UNP, PRACH signal expectation received power is raised one set step-length greater than AP_UP.
6. method as claimed in claim 5 is characterized in that, if determine that UNP is not more than AP_UP, then carries out following operation:
The value of statistics actual reception power of upward signal or signal to noise ratio in described setting duration, belong to setting the 3rd interval the 3rd cumulative number and belong to four-range the 4th cumulative number of setting; Wherein, it is normal to belong to the described the 3rd interval expression upward signal access power, and it is too high to belong to the described the 4th interval expression upward signal access power;
Insert excessive probability ONP according to described the 3rd cumulative number and the 4th cumulative number calculating upward signal;
ONP is crossed high probability AP_OP with default access power to be compared;
When determining UNP, step-length is set in one of PRACH signal expectation received power downward modulation greater than AP_OP.
7. a base station is characterized in that, comprising:
Detecting unit is used in setting duration, and the actual reception power or the signal to noise ratio of the upward signal that carries targeting sequencing preamble detected;
Statistic unit is used to add up the actual reception power of upward signal or the value of signal to noise ratio, in described setting duration, belong to setting first interval first cumulative number and belong to second cumulative number in second interval of setting; Wherein, it is normal to belong to the described first interval expression upward signal access power, and it is too high to belong to the described second interval expression upward signal access power;
Arithmetic element is used for inserting excessive probability ONP according to described first cumulative number and second cumulative number calculating upward signal;
Adjustment unit, the ONP that is used for obtaining compares with the threshold value of setting, and adjusts accordingly according to the value of comparative result to physical accidental access PRACH signal expectation received power.
8. base station as claimed in claim 7 is characterized in that, described adjustment unit compares the ONP that obtains and the default excessive probability AP_OP of access power, at definite ONP during greater than AP_OP, with a setting of PRACH signal expectation received power downward modulation step-length.
9. a base station is characterized in that, comprising:
Detecting unit is used in setting duration, and the actual reception power or the signal to noise ratio of the upward signal that carries targeting sequencing preamble detected;
Statistic unit is used to add up the actual reception power of upward signal or the value of signal to noise ratio, in described setting duration, belong to setting first interval first cumulative number and belong to second cumulative number in second interval of setting; Wherein, belong to the described first interval expression and do not have upward signal, belong to the described second interval expression and have upward signal, but its access power is low excessively;
Arithmetic element inserted small probability UNP according to described first cumulative number and second cumulative number calculating upward signal;
Adjustment unit, the UNP that is used to obtain and the threshold value of setting compare, and adjust accordingly according to the value of comparative result to PRACH signal expectation received power.
10. base station as claimed in claim 9 is characterized in that, described adjustment unit is crossed small probability AP_UP with the UNP that obtains with default access power and compared; , PRACH signal expectation received power is raised one set step-length during at definite UNP greater than AP_UP.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910082813A CN101873681B (en) | 2009-04-22 | 2009-04-22 | Method and device for adjusting received target power of PRACH (Physical Random Access Channel) signal |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102076006A (en) * | 2011-01-28 | 2011-05-25 | 武汉理工大学 | Method for detecting PRACH preamble signal |
| CN102238580A (en) * | 2011-08-04 | 2011-11-09 | 大唐移动通信设备有限公司 | PRACH (Physical Random Access Channel) detecting method and equipment |
| CN102711230A (en) * | 2012-06-20 | 2012-10-03 | 中兴通讯股份有限公司 | PRACH (Physical Random Access Channel) power self-adaption optimization adjusting method, system and base station |
| CN103648111A (en) * | 2013-12-12 | 2014-03-19 | 京信通信系统（中国）有限公司 | Interference alarm method and system |
| CN104618039A (en) * | 2015-01-27 | 2015-05-13 | 南京航空航天大学 | Algorithm for adjusting performance of receiver in real time according to communication conditions and receiver |
| CN105379398A (en) * | 2014-04-30 | 2016-03-02 | 华为技术有限公司 | Device and method for adjusting power control parameter of random access |
| CN109581908A (en) * | 2017-09-28 | 2019-04-05 | 霍尼韦尔国际公司 | The actuator tracked using condition |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| ES2249192B1 (en) * | 2005-08-17 | 2006-11-16 | T.O.P. Optimized Technologies, S.L. | EXTERNAL LOOP POWER CONTROL METHOD AND APPLIANCE FOR WIRELESS COMMUNICATION SYSTEMS. |
| CN100539459C (en) * | 2006-05-09 | 2009-09-09 | 华为技术有限公司 | Channel power control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102076006A (en) * | 2011-01-28 | 2011-05-25 | 武汉理工大学 | Method for detecting PRACH preamble signal |
| CN102076006B (en) * | 2011-01-28 | 2013-10-16 | 武汉理工大学 | Method for detecting PRACH preamble signal |
| CN102238580A (en) * | 2011-08-04 | 2011-11-09 | 大唐移动通信设备有限公司 | PRACH (Physical Random Access Channel) detecting method and equipment |
| CN102711230A (en) * | 2012-06-20 | 2012-10-03 | 中兴通讯股份有限公司 | PRACH (Physical Random Access Channel) power self-adaption optimization adjusting method, system and base station |
| CN102711230B (en) * | 2012-06-20 | 2017-12-22 | 中兴通讯股份有限公司 | Method, system and the base station that a kind of PRACH power adaptives are optimized and revised |
| CN103648111A (en) * | 2013-12-12 | 2014-03-19 | 京信通信系统（中国）有限公司 | Interference alarm method and system |
| CN105379398A (en) * | 2014-04-30 | 2016-03-02 | 华为技术有限公司 | Device and method for adjusting power control parameter of random access |
| CN105379398B (en) * | 2014-04-30 | 2019-11-12 | 华为技术有限公司 | A kind of device and method adjusting random access power contorl parameters |
| CN104618039A (en) * | 2015-01-27 | 2015-05-13 | 南京航空航天大学 | Algorithm for adjusting performance of receiver in real time according to communication conditions and receiver |
| CN104618039B (en) * | 2015-01-27 | 2017-10-10 | 南京航空航天大学 | A kind of algorithm and receiver for adjusting receiver performance in real time according to communication condition |
| CN109581908A (en) * | 2017-09-28 | 2019-04-05 | 霍尼韦尔国际公司 | The actuator tracked using condition |
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