CN102573035B - Method for setting power for terminal, and base station - Google Patents
Method for setting power for terminal, and base station Download PDFInfo
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- CN102573035B CN102573035B CN201110441979.2A CN201110441979A CN102573035B CN 102573035 B CN102573035 B CN 102573035B CN 201110441979 A CN201110441979 A CN 201110441979A CN 102573035 B CN102573035 B CN 102573035B
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Abstract
The invention provides a method for setting power for a terminal, and a base station, relates to the field of communications, and solves the problem of low accuracy in calculation of preamble initial power, which is caused by the reason that since RTWP (received total wideband power) varies too quickly, when preamble initial power is calculated, the used RTWP is not the RTWP of the moment. The method comprises the steps as follows: the RTWP of the moment is calculated to ensure that the RTWP of the moment relative to the rangeability value of RTWP calculated in the last moment of RTWP is smaller than the average value of RTWP in the current time period relative to the rangeability value of RTWP of the last moment; and the RTWP of the moment is sent to the terminal through a broadcasting channel, so that the terminal can calculates the preamble initial power according to the RTWP of the moment. The method can be applied to calculation of preamble initial power.
Description
Technical field
The present invention relates to communication technical field, particularly relate to the method into setting power for terminal and base station.
Background technology
In a communications system, set up when communicating in terminal and base station, terminal is by RACH (Random Access Channel, Random Access Channel) and use open loop transmit power to initiate access to base station, namely registers to base station.
Terminal is according to following formulae discovery open loop transmit power: Preamble_Initial_Power=Primary CPICH TX power-CPICH_RSCP+UL interference+Constant Value.
Wherein, Preamble_Initial_Power is open loop transmit power; Primary CPICH TX power-CPICH_RSCP is the downlink path loss of CPICH (Common Pilot Channel, Common Pilot Channel), and default upstream path loss is identical with downlink path loss; UL interference is CPICH uplink interference intensity, i.e. RTWP (Received Total Wideband Power, received total wideband power); ConstantValue is the constant value of BCH (Broadcast Channel, broadcast channel).
In prior art, terminal obtains the SIB7 message that base station uses BCH to send, and carries the RTWP of the current time after calculating in SIB7 message.Because RTWP change frequency is comparatively large, change is very fast, and therefore, the RTWP used when terminal calculates open loop transmit power can for comprising the mean value of all RTWP of current time before current slot, the mean value of RTWP is calculated by base station.
Can find out according to above-mentioned formula, the size of RTWP affects the size of open loop transmit power.When terminal uses open loop transmit power to initiate to access to base station, the size of RTWP is subject to the impact of open loop transmit power size.
State in the process into setting power for terminal in realization, inventor finds that in prior art, at least there are the following problems: in actual applications, because RTWP change frequency is fast, vary within wide limits, terminal receives RTWP according to this moment and calculates open loop transmit power, and when using this open loop transmit power to initiate access to base station, RTWP may change, this open loop transmit power is caused not to be open loop transmit power instantly needed for the moment, open loop transmit power is calculated inaccurate, size due to open loop transmit power also affects the size of RTWP value, and then cause RTWP value inaccurate.
Summary of the invention
Embodiments of the invention provide a kind of method for setting power for terminal and base station, solve because RTWP change is too fast, the RTWP used during the open loop transmit power calculated has not been the RTWP in moment instantly, causes the problem that open loop transmit power accuracy in computation is lower.
For achieving the above object, embodiments of the invention adopt following technical scheme:
Be a method for setting power for terminal, comprise:
Calculate the received total wideband power of current time, the variance values of the received total wideband power that the received total wideband power of described current time was calculated relative to the moment at the described received total wideband power of last calculating, be less than the variance values of current slot received total wideband power mean value relative to the received total wideband power of described previous moment, the described time period is the time period between the moment of adjacent calculating received total wideband power, described current slot is the time period comprising current time, described current time is the finish time of described current slot,
The received total wideband power of current time is sent to terminal, so that described terminal calculates open loop transmit power according to the received total wideband power of described current time by described broadcast channel.
A kind of base station, comprising:
Computing unit, for calculating the received total wideband power of current time, the variance values of the received total wideband power that the received total wideband power of described current time was calculated relative to the moment at the described received total wideband power of last calculating, be less than the variance values of current slot received total wideband power mean value relative to the received total wideband power of described previous moment, the described time period is the time period between the moment of adjacent calculating received total wideband power, described current slot is the time period comprising current time, described current time is the finish time of described current slot,
Transmitting element, for being sent the received total wideband power of the current time that described computing unit calculates to terminal by described broadcast channel, so that described terminal calculates open loop transmit power according to the received total wideband power of described current time.
A kind of radio network controller, comprising:
3rd amendment unit, for revising the numerical value of designated parameter, to revise the cycle of broadcast channel, the size of described designated parameter affects the cycle size of described broadcast channel, the numerical value of described designated parameter increases, the cycle of described broadcast channel increases, and the numerical value of described designated parameter reduces, and the cycle of described broadcast channel reduces;
Described period of broadcast channel is less, and described broadcast channel is less to the time interval of the received total wideband power of terminal transmission current time; Described period of broadcast channel is larger, and described broadcast channel is larger to the time interval of the received total wideband power of terminal transmission current time; The time interval that described terminal receives the received total wideband power of current time is shorter.
The method for setting power for terminal that the embodiment of the present invention provides and base station, after adopting such scheme, the RTWP of the current time calculated is not by the impact of the RTWP kurtosis in current slot, make the RTWP of current time relative to the variance values of the RTWP calculated in previous moment, be less than the variance values of current slot RTWP mean value relative to the RTWP of previous moment, the RTWP of the current time that terminal is received more can reflect the RTWP of current time, improve terminal calculates open loop transmit power accuracy according to the RTWP of the current time received.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
A kind of method schematic diagram for setting power for terminal that Fig. 1 provides for the present embodiment;
Fig. 2 for another kind that the present embodiment provides be the method schematic diagram of setting power for terminal;
What Fig. 3 provided for the present embodiment is the method schematic diagram of setting power for terminal by radio network controller and base station jointly;
RTWP oscillogram before and after method described in employing Fig. 2 that Fig. 4 provides for the present embodiment;
A kind of terminal structure figure that Fig. 5 provides for the present embodiment;
The another kind of terminal structure figure that Fig. 6 provides for the present embodiment;
A kind of radio network controller structure chart that Fig. 7 provides for the present embodiment.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The embodiment of the present invention provides a kind of method for setting power for terminal, as shown in Figure 1, comprises the following steps:
101, calculate the RTWP of current time, make the RTWP of current time relative to the variance values of the RTWP of the moment calculating at last calculating RTWP, be less than the variance values of current slot RTWP mean value relative to the RTWP of previous moment.
RTWP easily by ectocine, the frequency that RTWP may be caused to change comparatively greatly, intensity of variation greatly.
Such as, the quantity that the terminal communicated is carried out in a certain moment and base station increases more, and the degree causing the RTWP in this moment to increase is larger.
Therefore, base station calculates the RTWP of current time, makes the RTWP of the current time calculated can reflect RTWP variation tendency in this time period and numerical value, upper once calculate RTWP before, RTWP is constant, is the RTWP calculated for the last time.
In an execution mode of the embodiment of the present invention, the time period provided can for the time period between the moment of adjacent calculating RTWP, and current slot is the time period comprising current time, and current time is the finish time of current slot.
102, the RTWP of current time is sent to terminal by broadcast channel, so that terminal calculates open loop transmit power according to the RTWP of current time.
In order to make terminal calculate open loop transmit power according to the RTWP of the current time received, base station by BCH, and to send the RTWP of current time to terminal according to the cycle after arranging.
After adopting such scheme, the RTWP of the current time calculated is not by the impact of the RTWP kurtosis in current slot, make the RTWP of current time relative to the variance values of the RTWP calculated in previous moment, be less than the variance values of current slot RTWP mean value relative to the RTWP of previous moment, the RTWP of the current time that terminal is received more can reflect the RTWP of current time, improves terminal calculates open loop transmit power accuracy according to the RTWP of the current time received.
In an execution mode of the embodiment of the present invention, the method for another kind of setting power for terminal is provided, comprises the following steps:
The RTWP of the first step, calculating current time, makes the RTWP of current time relative to the variance values of the RTWP of the moment calculating at last calculating RTWP, is less than the variance values of current slot RTWP mean value relative to the RTWP of previous moment.
RTWP easily by ectocine, the frequency that RTWP may be caused to change comparatively greatly, intensity of variation greatly.
Such as, the quantity that the terminal communicated is carried out in a certain moment and base station increases more, and the degree causing the RTWP in this moment to increase is larger.
Therefore, base station calculates the RTWP of current time, makes the RTWP of the current time calculated can reflect RTWP variation tendency in this time period and numerical value, upper once calculate RTWP before, RTWP is constant, is the RTWP calculated for the last time.
In an execution mode of the embodiment of the present invention, base station calculates the RTWP of current time every Preset Time by the mode of filtering process.
In an execution mode of the embodiment of the present invention, if the RTWP that the RTWP of current time calculates relative to previous moment increases, then the first filtering factor is adopted to calculate; If the RTWP that the RTWP of current time calculates relative to previous moment reduces, then the second filtering factor is adopted to calculate; The speed that the RTWP making employing first filtering factor carry out calculating increases, be less than the speed of the RTWP decline that employing second filtering factor carries out calculating, the first filtering factor is less than the second filtering factor, and the speed increased is less than the speed of decline.
In an execution mode of the embodiment of the present invention, the time period that the present embodiment provides can for the time period between the moment of adjacent calculating RTWP, and current slot is the time period comprising current time, and current time is the finish time of current slot.
In an execution mode of the embodiment of the present invention, Preset Time can be: 90 milliseconds, 100 milliseconds etc.
The present embodiment is not construed as limiting Preset Time, can set according to actual needs, is not repeating at this.
In an execution mode of the embodiment of the present invention, calculate the RTWP of current time in base station before, first Preset Time is revised, make amended Preset Time shorter than the Preset Time before amendment, the cycle making base station calculate RTWP diminishes, calculated rate becomes large, and the RTWP calculated can reflect the RTWP of corresponding time period more, adds terminal calculates open loop transmit power accuracy according to this RTWP.
Concrete, as shown in Figure 2, the step being calculated the RTWP of current time every Preset Time by the mode of filtering process can be comprised:
201, estimate whether the RTWP of current time is greater than the RTWP of previous moment according to predetermined manner.
Because RTWP is easily by the impact of extraneous factor, and make the change frequency of RTWP comparatively large and intensity of variation is comparatively large, may there is spike in RTWP, the calculating impact of this spike on RTWP is comparatively large, and the RTWP calculated may be caused excessive.
In order to the RTWP reducing to calculate is subject to the impact of kurtosis, and make terminal can obtain the RTWP of current time accurately, therefore, according to predetermined manner, base station, before the RTWP calculating current time, first estimates whether the RTWP of current time is greater than the RTWP of previous moment.
In an execution mode of the embodiment of the present invention, the step whether being greater than the RTWP of previous moment according to the RTWP of predetermined manner estimation current time can comprise: the minimum value obtaining RTWP in current slot; Judge whether minimum value is greater than the RTWP of previous moment.
Predetermined manner can also be: obtain any number between the mean value of current slot and minimum value; Judge whether this numerical value got is greater than the RTWP of previous moment.
The present embodiment is not construed as limiting predetermined manner, can set according to actual needs, not repeat them here.
If minimum value is greater than the RTWP of previous moment, then illustrate that all RTWP in current slot are all greater than the RTWP of previous moment, namely the RTWP of current time is greater than the RTWP of previous moment; If minimum value is the RTWP being not more than previous moment, then illustrate that the RTWP in current slot may be greater than, also the RTWP of previous moment may be less than, even if but the RTWP in current slot is greater than the RTWP of previous moment, difference between them is less, therefore, if minimum value is the RTWP being not more than previous moment, then the RTWP that this situation be can be regarded as current time is not more than the RTWP of previous moment.
Concrete, if the RTWP of current time is greater than the RTWP of previous moment, then perform step 202; If the RTWP of current time is not more than the RTWP of previous moment, then perform step 203.
202, the RTWP of current time is that the RTWP of previous moment adds the first default value.
The span of the first default value can for being greater than 0 and being less than the difference that current slot RTWP mean value subtracts the RTWP of previous moment.
In an execution mode of the embodiment of the present invention, if the RTWP minimum value in current slot is greater than the RTWP of previous moment, then illustrate that in current slot, all RTWP are all greater than the RTWP of previous moment, the RTWP of current time increases relative to the RTWP of previous moment, and the amplitude increased is larger.
In an execution mode of the embodiment of the present invention, if the RTWP power that the RTWP of current time calculates relative to previous moment increases, then the first filtering factor is adopted to calculate.
In an execution mode of the embodiment of the present invention, as the present embodiment preferred embodiment, in order to the amplitude that the RTWP reducing current time increases relative to the RTWP of previous moment, then the first default value can be: minimum value subtracts 1/32nd of the difference of the RTWP of previous moment, wherein, 1/32nd the first filtering factor is.
The present embodiment is not construed as limiting the first filtering factor, can set according to actual needs, not repeat them here.
The present embodiment is not construed as limiting the first default value, can set according to actual needs, not repeat them here.
203, the RTWP of current time is that the RTWP of previous moment subtracts the second default value.
The span of the second default value can for being greater than 0 and the RTWP being less than previous moment subtracts the difference of current slot RTWP mean value.
In an execution mode of the embodiment of the present invention, if the RTWP minimum value in current slot is not more than the RTWP of previous moment, then illustrate that all RTWP in current slot are not all greater than the RTWP of previous moment, the RTWP of current time may increase relative to the RTWP of previous moment, also may reduce, but the amplitude increased is less.
If RTWP is excessive, the open loop transmit power making terminal use this RTWP to calculate is also excessive, size due to open loop transmit power also affects the size of RTWP, therefore, if open loop transmit power is excessive, the RTWP of subsequent time is caused to continue to increase, the excessive communication performance affected in network of RTWP.
In an execution mode of the embodiment of the present invention, if the RTWP power reduction that the RTWP of current time calculates relative to previous moment, the second filtering factor is adopted to calculate.
In order to the amplitude making the RTWP of current time increase relative to the RTWP of last time is little or do not increase, then the RTWP of current time is that the RTWP of last time subtracts the second default value.
In an execution mode of the embodiment of the present invention, as the present embodiment preferred embodiment, the second default value can be: the RTWP of previous moment subtracts 1/4th of the difference of minimum value, and wherein, 1/4th are the second filtering factor.
In an execution mode of the embodiment of the present invention, the first filtering factor is less than the second filtering factor, and the speed that the RTWP adopting the first filtering factor to carry out calculating increases, be less than the speed of the RTWP decline that employing second filtering factor carries out calculating.
The present embodiment is not construed as limiting the second filtering factor, can set according to actual needs, not repeat them here.
The present embodiment is not construed as limiting the second default value, can set according to actual needs, not repeat them here.
Second step, send the RTWP of current time by broadcast channel to terminal, so that terminal calculates open loop transmit power according to the RTWP of current time.
In order to make terminal calculate open loop transmit power according to the RTWP of the current time received, base station by BCH, and to send the RTWP of current time to terminal according to the cycle after arranging.
After adopting such scheme, the RTWP of the current time calculated is not by the impact of the RTWP kurtosis in current slot, make the RTWP of current time relative to the variance values of the RTWP calculated in previous moment, be less than the variance values of current slot RTWP mean value relative to the RTWP of previous moment, the RTWP of the current time that terminal is received more can reflect the RTWP of current time, improves terminal calculates open loop transmit power accuracy according to the RTWP of the current time received.
In an execution mode of the embodiment of the present invention, provide the method for another kind of setting power for terminal, the method and said method embodiment obtain the RTWP of current time in different ways, as shown in Figure 3, comprise the following steps:
301, judge whether the RTWP of current time is greater than default value.
RTWP is larger, more makes the accurately fixed lower of the open loop transmit power calculated according to this RTWP.Judge that whether the RTWP of current time is excessive by arranging default value.
In order to make place mat for subsequent step, judge whether the RTWP of current time is greater than default value.
Concrete, if the RTWP of current time is greater than default value, then perform step 302; If the RTWP of current time is not more than default value, then perform step 303.
302, period of broadcast channel is reduced.
BCH is the channel cycle that is set up according to self to the RTWP of terminal transmission current time, and the channel cycle of BCH is less, and BCH is less to the time interval of terminal transmission RTWP; Cycle is larger, and BCH is larger to the time interval of terminal transmission RTWP; The time interval that terminal receives RTWP is shorter, and the last RTWP that terminal receives more can reflect the RTWP of current time.
In an execution mode of the embodiment of the present invention, the RTWP received to make terminal can reflect the RTWP of current time, and by the numerical value of designated parameter in amendment agreement, reduce the BCH cycle, wherein, designated parameter affects the size in the cycle of BCH.
In an execution mode of the embodiment of the present invention, BCH channel cycle can be: 90 milliseconds, 100 milliseconds etc.
The present embodiment is not construed as limiting BCH channel cycle, can set according to actual needs, is not repeating at this.
The designated parameter of radio network controller affects the size of BCH channel cycle, and when the designated parameter of radio network controller reduces, BCH channel cycle reduces; When the designated parameter of radio network controller increases, BCH channel cycle increases.
In an execution mode of the embodiment of the present invention, be revised as the numerical value before being less than designated parameter amendment by the numerical value of the designated parameter by radio network controller, reduce BCH sends cycle from the RTWP of current time to terminal.
In order to make BCH channel cycle reduce, the numerical value of the designated parameter of radio network controller is revised as the numerical value before being less than designated parameter amendment.
The present embodiment is not construed as limiting the method reducing BCH channel cycle, can be any means well known to those skilled in the art, not repeat them here.
Perform step 304.
303, period of broadcast channel is increased.
In an execution mode of the embodiment of the present invention, the RTWP received to make terminal can reflect the RTWP of current time, by the numerical value of designated parameter in amendment agreement, increases the BCH cycle.
In an execution mode of the embodiment of the present invention, be revised as the numerical value before being greater than designated parameter amendment by the numerical value of the designated parameter by radio network controller, increase BCH sends cycle from the RTWP of current time to terminal.
In order to make BCH channel cycle increase, the numerical value of the designated parameter of radio network controller is revised as the numerical value before being greater than designated parameter amendment.
The present embodiment is not construed as limiting designated parameter, can be any designated parameter well known to those skilled in the art, not repeat them here.
The present embodiment is not construed as limiting the method increasing BCH channel cycle, can be any means well known to those skilled in the art, not repeat them here.
304, the RTWP of current time is calculated every Preset Time.
RTWP easily by ectocine, the frequency that RTWP may be caused to change comparatively greatly, intensity of variation greatly.
Such as, the quantity that the terminal communicated is carried out in a certain moment and base station increases more, and the degree causing the RTWP in this moment to increase is larger.
Therefore, base station calculates the RTWP of current time every Preset Time, makes the RTWP of the current time calculated can reflect RTWP variation tendency in this time period and numerical value, upper once calculate RTWP before, RTWP is constant, is the RTWP calculated for the last time.
In an execution mode of the embodiment of the present invention, the time period that the present embodiment provides can for the time period between the moment of adjacent calculating RTWP, and current slot can be the time period comprising current time, and current time is the finish time of current slot.
In an execution mode of the embodiment of the present invention, base station can according to the mean value of all RTWP comprising current time before current time, and using the RTWP of this mean value as current time.
The method of the RTWP of the calculating current time that the present embodiment provides is not construed as limiting, and can be any means well known to those skilled in the art, not repeat them here.
305, the RTWP of current time is sent to terminal by broadcast channel, so that terminal calculates open loop transmit power according to the RTWP of current time.
In an execution mode of the embodiment of the present invention, base station by BCH, and to send the RTWP of current time, so that terminal calculates open loop transmit power according to the RTWP of current time to terminal according to cycle of BCH.
In order to make terminal calculate open loop transmit power according to the RTWP of the current time received, BCH is passed through in base station, and according to the RTWP of the BCH cycle after amendment agreement to terminal transmission current time.
After adopting such scheme, by the numerical value of designated parameter in amendment agreement, if make RTWP be greater than default value, the cycle that BCH channel sends RTWP to terminal reduces, the frequency sending RTWP increases, if RTWP is less than default value, the cycle that BCH channel sends RTWP to terminal increases, and the frequency sending RTWP reduces; The RTWP value that terminal is received more can reflect the RTWP value of current time, improves terminal calculates open loop transmit power accuracy according to the RTWP value of the current time received.
In order to the goal of the invention that this programme can reach better is described, provide some data after adopting this programme and oscillogram below.
In Fig. 4, dotted line represents the mean value of RTWP within 1 second time period, realizes representing the RTWP after the process of employing rate ripple in this time period, is the RTWP of current time.
As shown in Figure 4, adopt the change of the RTWP after filtering process slow, amplitude of variation also reduces, and makes the RTWP obtained within a certain time period being less than 1 second can reflect RTWP in this time period.
In order to make the understanding better to above-described embodiment, provide the decoration embodiment corresponding with said method embodiment below.
The present embodiment provides a kind of base station, as shown in Figure 5, comprising: computing unit 51, transmitting element 52.
Wherein, computing unit 51, for computing unit, for calculating the RTWP of current time, the variance values of RTWP that the RTWP of current time was calculated relative to the moment at last calculating RTWP, is less than the variance values of current slot RTWP mean value relative to the RTWP of previous moment, and the time period is the time period between the moment of adjacent calculating RTWP, current slot is the time period comprising current time, and current time is the finish time of current slot.
Transmitting element 52, for being sent the RTWP of the current time that computing unit calculates to terminal by broadcast channel, so that terminal calculates open loop transmit power according to the RTWP of current time.
After adopting such scheme, the RTWP of the current time that computing unit calculates is not by the impact of the RTWP kurtosis in current slot, make the RTWP of current time relative to the variance values of the RTWP calculated in previous moment, be less than the variance values of current slot RTWP mean value relative to the RTWP of previous moment, the RTWP of the current time that terminal is received more can reflect the RTWP of current time, improves terminal calculates open loop transmit power accuracy according to the RTWP of the current time received.
In an execution mode of the embodiment of the present invention, another kind of base station is provided, as shown in Figure 6, comprises: judging unit 61, first revises unit 62, computing unit 63, transmitting element 64, second amendment unit 65.
Concrete, computing unit 63 comprises: estimation module 631, first computing module 632, second computing module 633, the 3rd computing module 634.
Estimation module 631 comprises: obtain submodule 6311, judge submodule 6312.
Judging unit 61, for judging whether RTWP is greater than default value.
RTWP is larger, more makes the accurately fixed lower of the open loop transmit power calculated according to this RTWP.Judge that whether the RTWP of current time is excessive by arranging preset data.
In order to make place mat for subsequent step, judging unit judges whether the RTWP of current time is greater than default value.
First amendment unit 62, if judge that the RTWP of current time is greater than default value for judging unit, then reduces period of broadcast channel; If judging unit judges that the RTWP of current time is less than default value, then period of broadcast channel is increased.
BCH is the channel cycle that is set up according to self to the RTWP of terminal transmission current time, and the channel cycle of BCH is less, and BCH is less to the time interval of terminal transmission RTWP; Cycle is larger, and BCH is larger to the time interval of terminal transmission RTWP; The time interval that terminal receives RTWP is shorter, and the last RTWP that terminal receives more can reflect the RTWP of current time.
In an execution mode of the embodiment of the present invention, the RTWP received to make terminal can reflect the RTWP of current time, and therefore, in the first amendment unit amendment agreement, the numerical value of designated parameter, if make RTWP be greater than default value, then reduces the BCH cycle; If RTWP is less than default value, then increased in the BCH cycle, wherein, designated parameter affects the size in the cycle of BCH.
In an execution mode of the embodiment of the present invention, period of broadcast channel is reduced to by the first amendment unit: period of broadcast channel is reduced by the numerical value of the designated parameter reducing radio network controller by the first amendment unit; Period of broadcast channel is increased to by the first amendment unit: period of broadcast channel is increased by the numerical value of the designated parameter increasing radio network controller by the first amendment unit; The size of the numerical value of designated parameter affects the size of period of broadcast channel.
Computing unit 63, for calculating the RTWP of current time, making the RTWP of current time relative to the variance values of the RTWP of the moment calculating at last calculating RTWP, being less than the variance values of current slot RTWP mean value relative to the RTWP of previous moment.
In an execution mode of the embodiment of the present invention, the RTWP that computing unit calculates current time is: computing unit is used for the RTWP of the current time calculated by the mode of filtering process every Preset Time.
RTWP easily by ectocine, the frequency that RTWP may be caused to change comparatively greatly, intensity of variation greatly.
Such as, the quantity that the terminal communicated is carried out in a certain moment and base station increases more, and the degree causing the RTWP in this moment to increase is larger.
Therefore, computing unit calculates the RTWP of current time every Preset Time by the mode of filtering process, make the RTWP of the current time calculated can reflect RTWP variation tendency in this time period and numerical value, upper once calculate RTWP before, RTWP is constant, is the RTWP calculated for the last time.
In an execution mode of the embodiment of the present invention, the time period that the present embodiment provides can for the time period between the moment of adjacent calculating RTWP, and current slot is the time period comprising current time, and current time is the finish time of current slot.
Concrete, according to predetermined manner, estimation module 631, for estimating whether the RTWP of current time is greater than the RTWP of previous moment.
In an execution mode of the embodiment of the present invention, estimation module obtains the minimum value of RTWP current slot, and judges whether minimum value is greater than the RTWP of previous moment.
If minimum value is the RTWP being greater than previous moment, then illustrate that the RTWP of current time is greater than the RTWP of previous moment; If minimum value is the RTWP being not more than previous moment, then illustrate that the RTWP of current time may be greater than, also the RTWP of previous moment may be less than, even if but the RTWP of current time is greater than the RTWP of previous moment, difference between them is less, therefore, if minimum value is the RTWP being not more than previous moment, then the RTWP that this situation be can be regarded as current time is not more than the RTWP of previous moment.
Concrete, obtain submodule 6311, for obtaining the minimum value of the RTWP of current slot.
Judge submodule 6312, for whether being greater than the RTWP of previous moment according to the minimum value obtaining submodule acquisition, estimate whether the RTWP of current time is greater than the RTWP of previous moment.
If minimum value is greater than the RTWP of previous moment, then the RTWP of current time is greater than the RTWP of previous moment.
If minimum value is not more than the RTWP of previous moment, then the RTWP of current time is not more than the RTWP of previous moment.
First computing module 632, if the RTWP calculated relative to previous moment for the RTWP of current time increases, then adopts the first filtering factor to calculate; If the RTWP that the RTWP of current time calculates relative to previous moment reduces, then the second filtering factor is adopted to calculate; The speed that the RTWP making employing first filtering factor carry out calculating increases, be less than the speed of the RTWP decline that employing second filtering factor carries out calculating, the first filtering factor is less than the second filtering factor.
The present embodiment is not construed as limiting the first setting factor beforehand and the second setting factor beforehand, can set according to actual needs, is not repeating at this.
Second computing module 633, if estimate that the RTWP of current time is greater than the RTWP of previous moment for estimation module, then the RTWP of current time is that the RTWP of previous moment adds the first default value, and the span of the first default value is be greater than 0 and be less than the difference that current slot RTWP mean value subtracts the RTWP of previous moment.
In an execution mode of the embodiment of the present invention, if minimum value is greater than the RTWP of previous moment, the first default value that then the first computing module uses every the RTWP that Preset Time calculates current time can be: minimum value subtracts 1/32nd of the difference of the RTWP of last time, wherein, 1/32nd the first filtering factor is.
3rd computing module 634, if estimate that the RTWP of current time is not more than the RTWP of previous moment for estimation module, then the RTWP of current time is that the RTWP of previous moment subtracts the second default value, and the span of the second default value is be greater than 0 and the RTWP being less than previous moment subtracts the difference of current slot RTWP mean value.
In an execution mode of the embodiment of the present invention, if minimum value is not more than the RTWP of previous moment, the second default value that then the first computing module uses every the RTWP that Preset Time calculates current time can be: the RTWP of previous moment subtracts 1/4th of the difference of minimum value, wherein, 1/4th the second filtering factor is.
Transmitting element 64, for being sent the RTWP of the current time that computing unit calculates to terminal by broadcast channel, so that terminal calculates open loop transmit power according to the RTWP of current time.
In order to make terminal calculate open loop transmit power according to the RTWP of the current time received, transmitting element by BCH, and to send the RTWP of current time to terminal according to the cycle after arranging.
In an execution mode of the embodiment of the present invention, transmitting element by BCH, and to send the RTWP of current time, so that terminal performs corresponding operating according to this RTWP to terminal according to cycle of BCH.
Second amendment unit 65, for revising Preset Time, makes amended Preset Time shorter than the Preset Time before amendment.
Before the RTWP calculating current time, second amendment unit first amendment calculates the Preset Time of RTWP, make amended Preset Time shorter than the Preset Time before amendment, the frequency making base station calculate RTWP becomes large, the RTWP calculated can reflect the RTWP of corresponding time more, adds terminal calculates open loop transmit power accuracy according to this RTWP.
After adopting such scheme, by numerical value or other parameter values of designated parameter in the first amendment unit amendment agreement, if make RTWP be greater than default value, the cycle that BCH channel sends RTWP to terminal reduces, the frequency sending RTWP increases, if RTWP is less than default value, the cycle that BCH channel sends RTWP to terminal increases, and the frequency sending RTWP reduces; The RTWP value that terminal is received more can reflect the RTWP value of current time, improves terminal calculates open loop transmit power accuracy according to the RTWP value received.
The present embodiment provides a kind of radio network controller mentioned in above-mentioned base station embodiment, as shown in Figure 7, comprising: amendment unit 71.
3rd amendment unit 71, for revising the numerical value of designated parameter, to revise the cycle of broadcast channel, the size of designated parameter affects the cycle size of broadcast channel, and the numerical value of designated parameter increases, and the cycle of broadcast channel increases, the numerical value of designated parameter reduces, and the cycle of broadcast channel reduces.
Period of broadcast channel is less, and broadcast channel is less to the time interval of the RTWP of terminal transmission current time; Period of broadcast channel is larger, and broadcast channel is larger to the time interval of the RTWP of terminal transmission current time; The time interval that terminal receives the RTWP of current time is shorter.
After adopting such scheme, 3rd amendment unit is by the numerical value of the designated parameter of amendment radio network controller, the cycle of broadcast channel is also revised thereupon, so that the RTWP of the current time that broadcast channel uses the amended channel cycle of amendment to send to terminal more can reflect improve terminal calculates open loop transmit power accuracy according to the RTWP of the current time received by the RTWP of current time.
Through the above description of the embodiments, those skilled in the art can be well understood to the mode that the present invention can add required common hardware by software and realize, and can certainly pass through hardware, but in a lot of situation, the former is better execution mode.Based on such understanding, technical scheme of the present invention can embody with the form of software product the part that prior art contributes in essence in other words, this computer software product is stored in the storage medium that can read, as the floppy disk of computer, hard disk or CD etc., comprise some instructions and perform method described in each embodiment of the present invention in order to make a computer equipment (can be personal computer, server, or the network equipment etc.).
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should described be as the criterion with the protection range of claim.
Claims (15)
1. be a method for setting power for terminal, it is characterized in that,
Calculate the received total wideband power of current time, the variance values of the received total wideband power that the received total wideband power of described current time was calculated relative to the moment at the described received total wideband power of last calculating, be less than the variance values of current slot received total wideband power mean value relative to the received total wideband power of described previous moment, the described time period is the time period between the moment of adjacent calculating received total wideband power, described current slot is the time period comprising current time, described current time is the finish time of described current slot,
The received total wideband power of current time is sent to terminal, so that described terminal calculates open loop transmit power according to the received total wideband power of described current time by broadcast channel.
2. according to claim 1 is the method for setting power for terminal, and it is characterized in that, the received total wideband power of described calculating current time is:
The received total wideband power of current time is calculated by the mode of filtering process every Preset Time.
3. according to claim 2 is the method for setting power for terminal, and it is characterized in that, the described received total wideband power calculating current time by the mode of filtering process every Preset Time comprises:
If the received total wideband power that the received total wideband power of described current time calculates relative to previous moment increases, then the first filtering factor is adopted to calculate; If the received total wideband power that the received total wideband power of described current time calculates relative to previous moment reduces, then the second filtering factor is adopted to calculate; Make the speed that the received total wideband power adopting described first filtering factor to carry out calculating increases, be less than the speed of the received total wideband power decline adopting described second filtering factor to carry out calculating, described first filtering factor is less than described second filtering factor.
4. according to claim 2 is the method for setting power for terminal, it is characterized in that, the described received total wideband power being sent current time by described broadcast channel to terminal, so that before described terminal calculates open loop transmit power according to the received total wideband power of described current time, described method also comprises:
Judge whether the received total wideband power of described current time is greater than default value;
If described received total wideband power is greater than described default value, then described period of broadcast channel is reduced; If described received total wideband power is less than described default value, then described period of broadcast channel is increased;
Described period of broadcast channel is less, and described broadcast channel is less to the time interval of the received total wideband power of terminal transmission current time; Described period of broadcast channel is larger, and described broadcast channel is larger to the time interval of the received total wideband power of terminal transmission current time; The time interval that described terminal receives the received total wideband power of current time is shorter;
The described received total wideband power sending current time to terminal by described broadcast channel is: by described broadcast channel, and send the received total wideband power of current time according to the cycle of described broadcast channel to terminal, so that described terminal calculates open loop transmit power according to the received total wideband power of described current time.
5. is the method for setting power for terminal according to Claims 2 or 3, and it is characterized in that, the described received total wideband power calculating current time by the mode of filtering process every Preset Time also comprises:
Estimate whether the received total wideband power of current time is greater than the received total wideband power of previous moment according to predetermined manner;
If the received total wideband power of described current time is greater than the received total wideband power of previous moment, then the received total wideband power of described current time is that the received total wideband power of described previous moment adds the first default value, and the span of described first default value is be greater than 0 and be less than the difference that current slot received total wideband power mean value subtracts the received total wideband power of described previous moment;
If the received total wideband power of described current time is not more than the received total wideband power of previous moment, then the received total wideband power of described current time is that the received total wideband power of described previous moment subtracts the second default value, and the span of described second default value is be greater than 0 and the received total wideband power being less than described previous moment subtracts the difference of current slot received total wideband power mean value.
6. according to claim 5 is the method for setting power for terminal, it is characterized in that, describedly estimates that the received total wideband power whether received total wideband power of current time is greater than previous moment comprises according to predetermined manner:
Obtain the minimum value of received total wideband power in current slot;
Whether be greater than the received total wideband power of previous moment according to described minimum value, estimate whether the received total wideband power of current time is greater than the received total wideband power of previous moment;
If described minimum value is greater than the received total wideband power of previous moment, then the received total wideband power of current time is greater than the received total wideband power of previous moment;
If described minimum value is not more than the received total wideband power of previous moment, then the received total wideband power of current time is not more than the received total wideband power of previous moment.
7. according to claim 6 is the method for setting power for terminal, and it is characterized in that, before the received total wideband power of described calculating current time, described method also comprises:
Revise described Preset Time, make amended described Preset Time shorter than the described Preset Time before amendment.
8. a base station, is characterized in that, comprising:
Computing unit, for calculating the received total wideband power of current time, the variance values of the received total wideband power that the received total wideband power of described current time was calculated relative to the moment at the described received total wideband power of last calculating, be less than the variance values of current slot received total wideband power mean value relative to the received total wideband power of described previous moment, the described time period is the time period between the moment of adjacent calculating received total wideband power, described current slot is the time period comprising current time, described current time is the finish time of described current slot,
Transmitting element, for being sent the received total wideband power of the current time that described computing unit calculates to terminal by broadcast channel, so that described terminal calculates open loop transmit power according to the received total wideband power of described current time.
9. base station according to claim 8, is characterized in that, the received total wideband power that described computing unit calculates current time is: described computing unit is used for the received total wideband power of the current time calculated by the mode of filtering process every Preset Time.
10. base station according to claim 9, is characterized in that, described computing unit comprises:
First computing module, if the received total wideband power calculated relative to previous moment for the received total wideband power of described current time increases, then adopts the first filtering factor to calculate; If the received total wideband power that the received total wideband power of described current time calculates relative to previous moment reduces, then the second filtering factor is adopted to calculate; Make the speed that the received total wideband power adopting described first filtering factor to carry out calculating increases, be less than the speed of the received total wideband power decline adopting described second filtering factor to carry out calculating, described first filtering factor is less than described second filtering factor.
11. base stations according to claim 9, is characterized in that, described base station also comprises:
Judging unit, for judging whether described received total wideband power is greater than default value;
First amendment unit, if judge that the received total wideband power of described current time is greater than described default value for described judging unit, then reduces described period of broadcast channel; If described judging unit judges that the received total wideband power of described current time is less than described default value, then described period of broadcast channel is increased;
Described period of broadcast channel is less, and described broadcast channel is less to the time interval of the received total wideband power of terminal transmission current time; Described period of broadcast channel is larger, and described broadcast channel is larger to the time interval of the received total wideband power of terminal transmission current time; The time interval that described terminal receives the received total wideband power of current time is shorter;
Described transmitting element is used for by described broadcast channel, and sends the received total wideband power of current time according to the cycle of described broadcast channel to terminal, so that described terminal calculates open loop transmit power according to the received total wideband power of described current time.
12. base stations according to claim 9 or 10, it is characterized in that, described computing unit comprises:
According to predetermined manner, estimation module, for estimating whether the received total wideband power of current time is greater than the received total wideband power of previous moment;
Second computing module, if estimate that the received total wideband power of described current time is greater than the received total wideband power of previous moment for described estimation module, then the received total wideband power of described current time is that the received total wideband power of described previous moment adds the first default value, and the span of described first default value is be greater than 0 and be less than the difference that current slot received total wideband power mean value subtracts the received total wideband power of described previous moment;
3rd computing module, if estimate that the received total wideband power of described current time is not more than the received total wideband power of previous moment for described estimation module, then the received total wideband power of described current time is that the received total wideband power of described previous moment subtracts the second default value, and the span of described second default value is be greater than 0 and the received total wideband power being less than described previous moment subtracts the difference of current slot received total wideband power mean value.
13. base stations according to claim 12, is characterized in that, described estimation module comprises:
Obtain submodule, for obtaining the minimum value of the received total wideband power of current slot;
Judge submodule, whether the described minimum value for obtaining according to described acquisition submodule is greater than the received total wideband power of previous moment, estimates whether the received total wideband power of current time is greater than the received total wideband power of previous moment;
If described minimum value is greater than the received total wideband power of previous moment, then the received total wideband power of current time is greater than the received total wideband power of previous moment;
If described minimum value is not more than the received total wideband power of previous moment, then the received total wideband power of current time is not more than the received total wideband power of previous moment.
14. base stations according to claim 13, is characterized in that, described base station also comprises:
Second amendment unit, for revising described Preset Time, makes amended described Preset Time shorter than the described Preset Time before amendment.
15. base stations according to claim 11, it is characterized in that, described period of broadcast channel is reduced to by described first amendment unit: described period of broadcast channel is reduced by the numerical value of the designated parameter reducing radio network controller by described first amendment unit; Described period of broadcast channel is increased to by described first amendment unit: described period of broadcast channel is increased by the numerical value of the designated parameter increasing radio network controller by described first amendment unit;
The size of the numerical value of described designated parameter affects the size of described period of broadcast channel.
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| EP1672814B1 (en) * | 2004-12-20 | 2010-07-14 | Telefonaktiebolaget LM Ericsson (publ) | Method and device for power control |
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| CN1859027A (en) * | 2006-01-09 | 2006-11-08 | 华为技术有限公司 | Method for controlling user's terminal transmitting power |
| CN1859028A (en) * | 2006-01-11 | 2006-11-08 | 华为技术有限公司 | Method for open loop power control of terminal |
| CN101316121A (en) * | 2007-05-31 | 2008-12-03 | 大唐移动通信设备有限公司 | Method and device for setting expectation received power value of ascending pilot channel |
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