CN102158941A - Power control method, equipment and system - Google Patents

Abstract

The embodiment of the invention provides a power control method, power control equipment and a system. The power control method comprises the following steps of: transmitting power control command words of the former a-1 timeslots in a preset period of time to user equipment, so that the transmission power, regulated according to the power control command words of the former a-1 timeslots, of the user equipment is the same as the transmission power before the regulation performed according to the power control command word of the first timeslot, wherein the period of time at least comprises a timeslots, and a is more than or equal to 3; acquiring an estimated signal energy value of the ath timeslot; determining the power control command word of the ath timeslot according to the estimated signal energy value; and transmitting the power control command word of the ath timeslot to the user equipment. By the technical scheme, the user equipment can timely regulate the transmission power of the next timeslot to reduce the transmission delay of the next timeslot symbol.

Description

Poewr control method, equipment and system

Technical field

The present invention relates to communication technical field, particularly a kind of Poewr control method, power control apparatus and system.

Background technology

Develop rapidly along with the communication technology, Wideband Code Division Multiple Access (WCDMA) (Wideband Code Division Multiple Access, WCDMA) as one of mainstream technology of 3-G (Generation Three mobile communication system), extensive studies and application have been obtained in the world, existing WCDMA system uplink all is to use Dedicated Physical Control Channel (Dedicated Physical Control Channel basically, the pilot tone of DPCCH) carrying is carried out channel estimating, obtain signal-to-jamming ratio (Signal Interference Ration, SIR).

In existing WCDMA system, each time slot of base station all can calculate SIR one time, the SIR and the threshold value SIR that calculate are compared, if the SIR that measures is greater than threshold value SIR, then determine through-put power control (Transmit Power Control, TPC) command word is 0, and TPC=0 is sent to subscriber equipment, and subscriber equipment is understood the transmitted power that reduces next time slot after receiving TPC=0; If the SIR that measures is less than threshold value SIR, determine that then the TPC command word is 1, TPC=1 is sent to subscriber equipment, subscriber equipment receives the transmitted power of the next time slot that can raise behind the TPC=1.

Prior art has following shortcoming:

Now, each time slot of base station all can calculate SIR one time, the SIR that calculates and threshold value SIR compared and determine the TPC command word, this process need regular hour, increased the time delay of subscriber equipment reception TPC command word, thereby make subscriber equipment can not adjust the transmitted power of next time slot timely, increased the time delay that sends next time slot symbol.

Summary of the invention

The embodiment of the invention provides a kind of Poewr control method, power control apparatus and system, can make subscriber equipment can in time adjust the transmitted power of next time slot, reduces the time delay that sends next time slot symbol.

In view of this, the embodiment of the invention provides:

A kind of Poewr control method comprises:

To subscriber equipment send preset period in the period before the power control command word of a-1 time slot, make subscriber equipment according to the power control command word regulated transmission power of a-1 time slot before described with identical according to the preceding transmitted power of the power control command word adjustment of the 1st time slot; Wherein, the described period in cycle comprises a time slot at least, and described a is greater than or equal to 3;

Obtain the signal energy estimated value of a time slot;

According to described signal energy estimated value, determine the power control command word of a time slot;

Send the power control command word of described a time slot to subscriber equipment.

A kind of power control apparatus comprises:

Preserve the unit, be used to preserve the power control command word of preceding a-1 time slot in the preset period period; Wherein, the described period in cycle comprises a time slot at least, and described a is greater than or equal to 3;

Signal energy estimated value acquiring unit is used to obtain the signal energy estimated value of a time slot;

The power control command word determining unit is used for determining the power control command word of a time slot according to described signal energy estimated value;

Transmitting element, the power control command word of a-1 time slot before being used in subscriber equipment sends the described period in cycle, make subscriber equipment according to the power control command word regulated transmission power of a-1 time slot before described with identical according to the preceding transmitted power of the power control command word adjustment of the 1st time slot; Send the power control command word of described a time slot to subscriber equipment.

The power control command word of embodiment of the invention power control apparatus preceding a-1 time slot in the period in cycle that subscriber equipment sends is the power control command word of presetting, the power control command word of a time slot is that signal energy estimated value according to a time slot obtains in the period in cycle that subscriber equipment sends, so not the required power control appliance at each time slot rated output control command word all, thereby can make subscriber equipment adjust the transmitted power of next time slot timely, reduce the time delay that sends next time slot symbol.

Description of drawings

In order to be illustrated more clearly in the technical scheme of the embodiment of the invention, to do to introduce simply to the accompanying drawing of required use among the embodiment below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.

Fig. 1 is the Poewr control method flow chart that one embodiment of the invention provides;

Fig. 2 is the Poewr control method flow chart that another embodiment of the present invention provides;

Fig. 3 is the Poewr control method flow chart that further embodiment of this invention provides;

Fig. 4 is the power control apparatus structure chart that the embodiment of the invention provides;

Fig. 5 is the system construction drawing that the embodiment of the invention provides.

Embodiment

Consult Fig. 1, the embodiment of the invention provides a kind of Poewr control method, and it comprises:

101, to subscriber equipment send preset period in the period before the power control command word of a-1 time slot, make subscriber equipment according to the power control command word regulated transmission power of a preceding a-1 time slot with identical according to the preceding transmitted power of the power control command word adjustment of the 1st time slot; Wherein, the described period in cycle comprises a time slot at least, and described a is greater than or equal to 3.

Wherein, the executive agent of the embodiment of the invention is a power control apparatus, and this power control apparatus can be the base station, also can be other access device, does not influence realization of the present invention.

In a kind of optional execution mode, suppose a=3, then power control apparatus reduces transmitted power to the power control command word indication subscriber equipment of the 1st time slot of subscriber equipment transmission; Power control apparatus is indicated subscriber equipment rising transmitted power to the power control command word of the 2nd time slot that subscriber equipment sends; Perhaps, power control apparatus is to the power control command word indication subscriber equipment rising transmitted power of the 1st time slot of subscriber equipment transmission; Power control apparatus reduces transmitted power to the power control command word indication subscriber equipment of the 2nd time slot that subscriber equipment sends; Like this, be equivalent to preceding 2 time slots and the transmitted power of subscriber equipment do not adjusted, and can with the existing protocol compatibility, guarantee at each time slot transmission power control commands word all.

In another embodiment, a can be for more than or equal to 3 odd number, and for example a equals 5,7 equivalences.For example, when a equals 5, power control apparatus reduces transmitted power to the power control command word indication subscriber equipment of first time slot that subscriber equipment sends, the power control command word indication subscriber equipment rising transmitted power of second time slot that power control apparatus sends to subscriber equipment, and third and fourth time slot then respectively just subscriber equipment reduce the transmitted power that raises again earlier.

Perhaps, a can be even number value, and for example a equals 4 or 6.When a equals 4, at first time slot, second time slot and the 3rd time slot, power control apparatus can send the power control command word that an indication subscriber equipment reduces transmitting power to subscriber equipment, the power control command word of an indication subscriber equipment rising transmitting power, and an indication subscriber equipment keeps the constant power control command word of transmitting power, its specific implementation method and a equal 3 o'clock similar, do not influence realization of the present invention.

102, obtain the signal energy estimated value of a time slot.

Need to prove: DPCCH subframe and E-DPCCH (Enhanced Dedicated Physical Data Channel, the enhancing Dedicated Physical Data Channel) subframe is a synchronized transmission, an E-DPCCH subframe lengths can be 2ms, comprises 3 time slots, 10 symbols of each time slot; A DPCCH subframe lengths can be 10ms, comprises 15 time slots, 10 symbols of each time slot.General, power control apparatus also receives the symbol of a time slot of DPCCH subframe when receiving time slot symbol of E-DPCCH subframe, and promptly the time slot symbol of the time slot symbol of E-DPCCH subframe and DPCCH subframe is to receive synchronously.

When a=3, the specific implementation of this step is: after receiving the part symbol of E-DPCCH the 3rd time slot that subscriber equipment sends, symbol according to the 1st time slot of the E-DPCCH subframe that is received, the part symbol of the symbol of the 2nd time slot and the 3rd time slot, determine transformat combination indication E-TFCI, according to the DPCCH subframe time slot of E-DPCCH subframe the 3rd slot synchronization in frequency pilot sign, determine the frequency pilot sign of E-DPCCH subframe the 3rd time slot, frequency pilot sign according to E-TFCI and E-DPCCH subframe the 3rd time slot, determine the signal energy estimated value of E-DPCCH subframe the 3rd time slot, wherein, the signal energy estimated value of E-DPCCH subframe the 3rd time slot is: the difference of the noise energy estimated value that the number of believing one side only Energy Estimation value and E-DPCCH subframe the 3rd time slot are arranged of E-DPCCH subframe the 3rd time slot is converted the value after the DPCCH subframe energy level, be understandable that, in the embodiment of the present application, the signal energy estimated value of this E-DPCCH subframe the 3rd time slot is the nothing number of the believing one side only Energy Estimation value of this E-DPCCH subframe the 3rd time slot; Wherein, the mode of the signal energy estimated value of concrete definite E-DPCCH subframe the 3rd time slot is: obtain the pairing signal energy bias of this E-TFCI; According to the frequency pilot sign of E-DPCCH subframe the 3rd time slot and the part symbol of the 3rd time slot, determine the noise energy estimated value that the number of believing one side only Energy Estimation value and E-DPCCH subframe the 3rd time slot are arranged of this E-DPCCH subframe the 3rd time slot; According to E-DPCCH subframe the 3rd time slot the poor of the number of believing one side only Energy Estimation value and noise energy estimated value arranged, and described signal energy bias obtains the signal energy estimated value of E-DPCCH subframe the 3rd time slot.Wherein, the frequency pilot sign of E-DPCCH subframe the 3rd time slot be according to the DPCCH subframe time slot of E-DPCCH subframe the 3rd slot synchronization in frequency pilot sign obtain.

When a=5, according to above-mentioned explanation to the E-DPCCH subframe lengths as can be known, 5 time slots have comprised 1 complete E-DPCCH subframe, at this moment, the specific implementation of this step is: directly utilize the previous complete pairing E-TFCI of E-DPCCH subframe, picked up signal energy-bias value then according to the frequency pilot sign of the 5th time slot in the period in cycle and the part symbol of the 5th time slot, is determined the noise energy estimated value that the number of believing one side only Energy Estimation value and the 5th time slot are arranged of the 5th time slot; Poor according to the noise energy estimated value that the number of believing one side only Energy Estimation value and the 5th time slot are arranged of the 5th time slot, and this signal energy bias obtain the signal energy estimated value of the 5th time slot.Wherein, in the period in cycle the frequency pilot sign of the 5th time slot be according to the DPCCH subframe time slot of this slot synchronization in frequency pilot sign obtain.

103,, determine the power control command word of a time slot according to described signal energy estimated value.

Wherein, in the various embodiments of the present invention, the power control command word of certain time slot is meant and is used to control the command word of transmitted power of symbol that subscriber equipment is adjusted the next time slot of this time slot.

104, send the power control command word of described a time slot to subscriber equipment.

The power control command word of embodiment of the invention power control apparatus preceding a-1 time slot in the period in cycle that subscriber equipment sends is the power control command word of presetting, the power control command word of a time slot is to obtain according to the signal energy estimated value in the period in cycle in the period in cycle that subscriber equipment sends, so not the required power control appliance at each time slot rated output control command word all, thereby can make subscriber equipment adjust the transmitted power of next time slot timely, reduce the time delay that sends next time slot symbol.

Consult Fig. 2, the embodiment of the invention provides another kind of Poewr control method, and it is that example is described that this method equals 3 with a, and this method specifically comprises:

201, power control apparatus receives the symbol of E-DPCCH subframe the 1st time slot, sends the power control command word of the 1st default time slot to subscriber equipment.

202, power control apparatus receives the symbol of E-DPCCH subframe the 2nd time slot, sends the power control command word of the 2nd default time slot to subscriber equipment.

Wherein, a power control command word indication subscriber equipment in the 1st time slot power control command word that should be default and the power control command word of the 2nd time slot reduces transmitted power, another power control command word indication subscriber equipment rising transmitted power, make subscriber equipment according to the power control command word regulated transmission power of the 2nd time slot with to adjust preceding transmitted power according to the power control command word of the 1st time slot identical.

203, power control apparatus is when receiving 2N+M-1 symbol of E-DPCCH subframe, according to 2N+M-1 sign computation E-TFCI of the E-DPCCH subframe that is received.

Wherein, N is the number of symbols of each time slot of E-DPCCH subframe, and N equals 10 usually; M is the number of pilot symbols of each slot transmission of DPCCH subframe, and usually, M can equal 4,5 or 6.Power control apparatus begins to calculate E-TFCI when 2N+M-1 symbol, can calculate E-TFCI when 2N+M symbol.

204, power control apparatus is when receiving 2N+M symbol of E-DPCCH subframe, according to the DPCCH subframe time slot of E-DPCCH subframe the 3rd slot synchronization in frequency pilot sign, determine the frequency pilot sign of E-DPCCH subframe the 3rd time slot.

Because the frequency pilot sign of each time slot of DPCCH subframe is a preceding M symbol of each time slot of DPCCH subframe, thereby just when 2N+M symbol of E-DPCCH subframe, can parse the frequency pilot sign in the DPCCH subframe time slot with E-DPCCH subframe the 3rd slot synchronization, and obtain the frequency pilot sign of E-DPCCH subframe the 3rd time slot according to this frequency pilot sign.

205, power control apparatus obtains the pairing signal energy bias of described E-TFCI.Wherein, the signal energy bias is represented the biasing of the transmitted power of E-DPCCH subframe with respect to the transmitted power of DPCCH subframe.

Wherein, can preset the corresponding relation of E-TFCI and power bias value on the power control apparatus, concrete, power control apparatus is according to the corresponding relation of E-TFCI and power bias value, obtain the pairing power bias value of this E-TFCI, ask this power bias value square, obtain the pairing signal energy bias of E-TFCI.Wherein, power bias value is that the amplitude of transmission signal of expression E-DPCCH subframe is with respect to the biasing of the amplitude of the transmission signal of DPCCH subframe, also can be described as the ratio of amplitude of the transmission signal of the amplitude of transmission signal of E-DPCCH subframe and DPCCH subframe, this power bias value can be a predetermined value.Perhaps, preset the corresponding relation of E-TFCI and signal energy bias on the power control apparatus, power control apparatus obtains the pairing signal energy bias of this E-TFCI according to the corresponding relation of E-TFCI and signal energy bias in this step.

206, power control apparatus is according to the symbol of the frequency pilot sign of E-DPCCH subframe the 3rd time slot and E-DPCCH subframe the 3rd time slot that received, determine the signal energy estimated value before E-DPCCH subframe the 3rd time slot conversion, the signal energy estimated value before this E-DPCCH subframe the 3rd time slot conversion is that the number of the believing one side only Energy Estimation value that has of E-DPCCH subframe the 3rd time slot deducts noise energy estimated value poor of E-DPCCH subframe the 3rd time slot.

Wherein, the symbol of E-DPCCH subframe the 3rd time slot that is received in this step can be a preceding M symbol of the 3rd time slot.

Concrete, can the number of believing one side only Energy Estimation value and noise energy estimated value be arranged according to what the symbol of the frequency pilot sign of E-DPCCH subframe the 3rd time slot and E-DPCCH subframe the 3rd time slot that is received was determined E-DPCCH subframe the 3rd time slot, there is the number of believing one side only Energy Estimation value to deduct the noise energy estimated value this, obtains the preceding signal energy estimated value of this E-DPCCH subframe the 3rd time slot conversion.

207, the signal energy estimated value before power control apparatus is converted this E-DPCCH subframe the 3rd time slot obtains the signal energy estimated value of this E-DPCCH subframe the 3rd time slot divided by the signal energy bias.

Wherein, signal energy estimated value before this E-DPCCH subframe the 3rd time slot conversion is equivalent to the signal energy estimated value before the conversion of E-DPCCH subframe the 3rd time slot is converted the energy level of DPCCH subframe divided by the signal energy bias, so that determine power control command word in the subsequent step.

208, power control apparatus is determined the estimated value of the signal-to-jamming ratio characterization parameter of E-DPCCH subframe the 3rd time slot according to the signal energy estimated value of this E-DPCCH subframe the 3rd time slot and the noise energy estimated value of E-DPCCH subframe the 3rd time slot; According to the estimated value and the threshold value of described signal-to-jamming ratio characterization parameter, generate the power control command word of the 3rd time slot.

Wherein, the signal-to-jamming ratio characterization parameter can be that (Signal Interference Ratio SIR), also can be Signal to Interference plus Noise Ratio (Signal to Interference plus Noise Ratio to signal interference ratio, SINR) etc., do not influence realization of the present invention.Optionally, can also carry out filtering to the estimated value of signal-to-jamming ratio characterization parameter, obtain the actual value of signal-to-jamming ratio characterization parameter, the actual value of comparison signal interference ratio characterization parameter and threshold value then, generate the power control command word of the 3rd time slot according to comparative result, like this, can make the SIR actual value that compares with threshold value more steady, big deviation can not occur.Concrete, when the signal-to-jamming ratio characterization parameter was SIR, threshold value was a predetermined sir target value, when SIR actual value during greater than threshold value, and the power control command word of the 3rd time slot of Sheng Chenging indication subscriber equipment reduction transmitted power then; When the SIR actual value was less than or equal to threshold value, then the power control command word of the 3rd time slot of Sheng Chenging was indicated subscriber equipment rising transmitted power.

Concrete, the base station can utilize following formula that the estimated value of signal-to-jamming ratio characterization parameter is carried out filtering, obtains the actual value of signal-to-jamming ratio characterization parameter:

y(n)＝x*(1-b)+y(n-1)*b

Wherein, b is a filter factor, and b is an empirical value that rule of thumb obtains, and for example b can be 0.6,0.9 or the like.N=1,2 or 3, x are the estimated value of the signal-to-jamming ratio characterization parameter of n time slot of E-DPCCH subframe; Y (n-1) is the actual value of the signal-to-jamming ratio characterization parameter of n-1 time slot of E-DPCCH subframe, and y (n) is the actual value of the signal-to-jamming ratio characterization parameter of n time slot of E-DPCCH subframe; Wherein, when n=1 or 2, x and y (n-1) are the actual value of the signal-to-jamming ratio characterization parameter of the 3rd time slot of the previous E-DPCCH subframe of the described E-DPCCH subframe of power control apparatus reception.

The embodiment of the invention is when 2N+M-1 symbol, just according to the sign computation E-TFCI of the E-DPCCH subframe that is received; When 2N+M symbol, just can determine the signal energy estimated value of E-DPCCH subframe the 3rd time slot according to the frequency pilot sign of E-DPCCH subframe the 3rd time slot and the symbol of E-DPCCH subframe the 3rd time slot that is received, further generate power control command word.Like this, power control apparatus just can also not received fully at the symbol of E-DPCCH subframe the 3rd time slot and is just begun to carry out the correlation computations that generates power control command word, the power control command word that generates is sent to subscriber equipment make subscriber equipment adjust the transmitted power of next time slot timely, save the time delay that sends next time slot symbol.

For technical scheme that the embodiment of the invention is provided is clearer, following embodiment is described in detail technique scheme:

301, the base station receives the symbol of E-DPCCH subframe the 1st time slot, sends TCP1=0 to subscriber equipment, makes subscriber equipment adjust the transmitted power that next time slot sends the E-DPCCH subframe.

Wherein, TCP1=0 is used to indicate subscriber equipment to reduce transmitted power, subscriber equipment just reduces transmitted power Δ TPC after receiving TCP1, utilize the symbol of transmitted power transmission E-DPCCH subframe the 2nd time slot after reducing, wherein, Δ TPC is the predetermined electric power step-length, and Δ TPC can be 1dB, perhaps other preset values.

302, the base station receives the symbol of E-DPCCH subframe the 2nd time slot, sends TCP2=1 to subscriber equipment, makes subscriber equipment adjust the transmitted power that next time slot sends the E-DPCCH subframe.

Wherein, TCP2=1 is used to indicate subscriber equipment rising transmitted power, and subscriber equipment receives the Δ TPC that just transmitted power raise behind the TCP2, utilizes transmitted power after raising to send the symbol of E-DPCCH subframe the 3rd time slot.

Need to prove, subscriber equipment is receiving that TCP1 reduces Δ TPC with transmitted power, the Δ TPC that after receiving TCP2 transmitted power raise because the amplitude that transmitted power reduces is identical with the amplitude of rising, is equivalent to transmitted power effectively not adjusted.

Optionally, the base station can be 1 to the TCP1 that subscriber equipment sends in step 301, and subscriber equipment is received behind the TCP1 Δ TPC that transmitted power raise, and utilizes transmitted power after raising to send the symbol of E-DPCCH subframe the 2nd time slot; The base station is 0 to the TCP2 that subscriber equipment sends in step 302, subscriber equipment reduces Δ TPC with transmitted power after receiving TCP2, utilize the symbol of transmitted power transmission E-DPCCH subframe the 3rd time slot after reducing, like this because the amplitude that transmitted power raises is identical with the amplitude of reduction, so also be equivalent to transmitted power effectively not adjusted.

When 303, the base station receives the 4th symbol of E-DPCCH subframe the 3rd time slot, utilize preceding 24 symbol resolution E-TFCI of E-DPCCH subframe, according to the corresponding relation of E-TFCI that presets in the base station and power bias value, determine the pairing power bias value of E-TFCI that is parsed.

Wherein, the E-DPCCH subframe comprises 10 bit informations, and 10 bit informations comprise three parts:

1, E-TFCI:E-DCH transport format combination indicator, 7bit is long, is used in reference to and is shown in E-DCH Dedicated Physical Data Channel (E-DCH Dedicated Physical Data Channel, the E-DPDCH) transformat of channel.In fact, how many bar E-DPDCH channel parallel transmissions are the size of transmission block just can derive by according to this information base station among the E-TFCI meeting informing base station E-DPDCH, used which type of spreading factor etc.

2, RSN: re-transmission sequence number, 2bit is long, is used to notify the sequence number of the transmission block of current transmission on E-DPDCH.

3, Happy bit: have only 1bit, be used to indicate UE whether current data rate is satisfied with, perhaps whether need to distribute higher power.

The binary phase shift keying signal of the 10 bit informations process transmission channel of E-DPCCH subframe (Binary Phase Shift Keying, BPSK) the modulation back forms 30 symbols, and the embodiment of the invention just begins to resolve E-TFCI after receiving the 24th symbol.

304, when the base station receives the 5th symbol with the DPCCH time slot of E-DPCCH the 3rd slot synchronization, utilize the frequency pilot sign Pilot (i.e. preceding 5 symbols of this DPCCH time slot) of this DPCCH time slot, determine the frequency pilot sign of E-DPCCH subframe the 3rd time slot, according to the symbol in the frequency pilot sign of E-DPCCH subframe the 3rd time slot and E-DPCCH subframe the 3rd time slot that received, that calculates E-DPCCH subframe the 3rd time slot has the number of believing one side only Energy Estimation value and a noise energy estimated value, to there be the number of believing one side only Energy Estimation value to deduct the noise energy estimated value, obtain the preceding signal energy estimated value of E-DPCCH subframe the 3rd time slot conversion.

Frequency pilot sign in the agreement in each time slot of regulation DPCCH subframe all is these several symbols in time slot front, preceding 5 symbols of each time slot of supposition DPCCH subframe are frequency pilot signs among this embodiment, this step utilizes the frequency pilot sign of this time slot to calculate the frequency pilot sign of E-DPCCH subframe the 3rd time slot behind the frequency pilot sign that receives with the DPCCH subframe time slot of E-DPCCH the 3rd slot synchronization immediately.Wherein, the process of calculating the frequency pilot sign of E-DPCCH subframe the 3rd time slot comprises: the frequency pilot sign with the time slot of the DPCCH subframe of E-DPCCH the 3rd slot synchronization is carried out conjugate multiplication handle and obtain channel response, utilize channel response that each footpath symbol of E-DPCCH subframe the 3rd time slot is rectified a deviation, obtain the signal of symbol level, resulting symbol level signal is carried out hard decision, obtain the E-DPCCH frequency pilot sign.

Wherein, this step can utilize following formula (1) and (2) to determine the noise energy estimated value of E-DPCCH subframe the 3rd time slot:

${\mathrm{\σ}}_{i,E-\mathrm{DPCCH}}^2=\frac{1}{M-1}\×\underset{j=0}{\overset{M}{\mathrm{\Σ}}}{|y_{E-\mathrm{DPCCH},i,j}\×a_j-\frac{1}{M}\×\underset{k=0}{\overset{M}{\mathrm{\Σ}}}{y}_{E-\mathrm{DPCCH},i,j}\×a_k|}^2---\left(1\right)$

Wherein, i=0,1,2.......L-1, L are the number of effective diameter.y _{E-DPCCH, i, j}J the symbol in i footpath in time slot of expression E-DPCCH subframe, M represents the number of pilots in each time slot, present embodiment supposition M=5; a _kAnd a _jFrequency pilot sign for E-DPCCH subframe the 3rd time slot.

${\mathrm{\σ}}_{s,E-\mathrm{DPCCH}}^2=\frac{1}{M}\underset{i=0}{\overset{L-1}{\mathrm{\Σ}}}{\mathrm{\σ}}_{i,E-\mathrm{DPCCH}}^2---\left(2\right)$

Wherein,

The noise energy estimated value of expression E-DPCCH subframe the 3rd time slot.

Wherein, this step can be utilized following formula (3), obtains the preceding signal energy estimated value E of E-DPCCH subframe the 3rd time slot conversion _{S, E-DPCCH}:

$E_{s,E-\mathrm{DPCCH}}=\underset{i=0}{\overset{L-1}{\mathrm{\Σ}}}{\left|\frac{\underset{j=0}{\overset{N-1}{\mathrm{\Σ}}}{y}_{E-\mathrm{DPCCH},i,j}\×a_j}{M}\right|}^2-{\mathrm{\σ}}_{s,E-\mathrm{DPCCH}}^2---\left(3\right)$

Wherein, in the formula (3) minuend be E-DPCCH subframe the 3rd time slot the number of believing one side only Energy Estimation value arranged, subtrahend is the noise energy estimated value of E-DPCCH subframe the 3rd time slot.

305, the signal energy estimated value of base station before with the conversion of E-DPCCH subframe the 3rd time slot obtained in the step 304 divided by the determined power bias value of step 303 square, the signal energy estimated value of E-DPCCH subframe the 3rd time slot after obtaining converting.

Concrete, utilize following formula (4), determine the signal energy estimated value E ' of E-DPCCH subframe the 3rd time slot _{S, E-DPCCH}:

$E_{s,E-\mathrm{DPCCH}}^{\′}=\frac{E_{s,E-\mathrm{DPCCH}}}{(\mathrm{BetaEc}\×\mathrm{BetaEc})}---\left(4\right)$

Wherein, BetaEc represents power bias.

306, the base station utilizes the signal energy estimated value of E-DPCCH subframe the 3rd time slot and the noise estimation value of E-DPCCH subframe the 3rd time slot, determines the sir value of E-DPCCH subframe the 3rd time slot correspondence.

Concrete, utilize following formula (5) to determine the sir value of E-DPCCH subframe the 3rd time slot correspondence:

$\mathrm{SIR}=\frac{E_{s,E-\mathrm{DPCCH}}^{\′}}{{\mathrm{\σ}}_{s,E-\mathrm{DPCCH}}^2\×M}---\left(5\right)$

307, more determined sir value in base station and threshold value generate TCP3 according to comparative result.

Wherein, threshold value is the target SIR value of base station predetermined set.When determined sir value during greater than threshold value, TCP3=0 then, wherein, TCP3=0 is used to indicate subscriber equipment to reduce transmitted power; When determined sir value is less than or equal to threshold value, TCP3=1 then, wherein, TCP3=1 is used to indicate subscriber equipment rising transmitted power.

308, the base station sends TCP3 to subscriber equipment, makes subscriber equipment adjust the transmitted power of next time slot according to TCP3.

The embodiment of the invention is at the E-DPCCH subframe, the TCP1 that is sent is pre-configured with TCP2 and can makes subscriber equipment identical according to the preceding transmitted power of TCP1 adjustment according to TCP2 regulated transmission power and this subscriber equipment, be equivalent to so the transmitted power of subscriber equipment not adjusted, and just generate effective power control command word TCP3 and send to subscriber equipment at the 3rd time slot, this Poewr control method under the boosting pattern can effectively be controlled the transmitted power of subscriber equipment.Further,, need not generate temporarily,, save the time delay that sends next time slot symbol so can make subscriber equipment can adjust the transmitted power of next time slot timely because TCP1 and TCP2 are pre-configured.

Consult Fig. 4, the embodiment of the invention provides a kind of power control apparatus, and this power control apparatus can be the base station, also can be other access device, and this power control apparatus comprises:

Preserve unit 10, be used to preserve the power control command word of preceding a-1 time slot in the preset period period; Wherein, the described period in cycle comprises a time slot at least, and described a is greater than or equal to 3;

Signal energy estimated value acquiring unit 20 is used to obtain the signal energy estimated value of a time slot;

Power control command word determining unit 30 is used for determining the power control command word of a time slot according to described signal energy estimated value;

Transmitting element 40, the power control command word of a-1 time slot before being used in subscriber equipment sends the described period in cycle, make subscriber equipment according to the power control command word regulated transmission power of a-1 time slot before described with identical according to the preceding transmitted power of the power control command word adjustment of the 1st time slot; Send the power control command word of described a time slot to subscriber equipment.

Wherein, a equals 3 or 5 or 7 etc., and when a equaled 3, a time slot was the 3rd time slot of E-DPCCH subframe, and signal energy estimated value acquiring unit 20 specifically can comprise:

E-TFCI determining unit 21, after being used to receive the part symbol of enhancing Dedicated Physical Data Channel E-DPCCH subframe the 3rd time slot that subscriber equipment sends, according to the symbol of E-DPCCH subframe the 1st time slot, the symbol of the 2nd time slot and the part symbol of the 3rd time slot, determine transformat combination indication E-TFCI;

Frequency pilot sign determining unit 22, be used for according to the frequency pilot sign of the DPCCH subframe time slot of E-DPCCH subframe the 3rd slot synchronization, determine the frequency pilot sign of E-DPCCH subframe the 3rd time slot;

Signal energy estimated value determining unit 23 is used for the frequency pilot sign according to described E-TFCI and described E-DPCCH subframe the 3rd time slot, determines the signal energy estimated value of E-DPCCH subframe the 3rd time slot.

Wherein, in one embodiment, signal energy estimated value determining unit 23 specifically comprises:

First acquiring unit 231 is used to obtain the pairing signal energy bias of described E-TFCI; Described signal energy bias is represented the biasing of the transmitted power of described E-DPCCH subframe with respect to the transmitted power of Dedicated Physical Data Channel DPCCH subframe;

Second acquisition unit 232 is used for determining the noise energy estimated value that the number of believing one side only Energy Estimation value and E-DPCCH subframe the 3rd time slot are arranged of E-DPCCH subframe the 3rd time slot according to the frequency pilot sign of E-DPCCH subframe the 3rd time slot and the symbol of the 3rd time slot that is received; According to described the poor of the number of believing one side only Energy Estimation value and noise energy estimated value arranged, and described signal energy bias, obtain the signal energy estimated value of described E-DPCCH subframe the 3rd time slot.

Wherein, power control apparatus receives the time slot symbol of E-DPCCH subframe and the time slot symbol of DPCCH subframe synchronously, and is concrete, and the square method embodiment part of associated description such as length to E-DPCCH subframe and DPCCH subframe does not repeat them here.

Wherein, E-TFCI determining unit 21, specifically be used for when receiving 2N+M-1 symbol of E-DPCCH subframe, symbol according to described E-DPCCH subframe the 1st time slot, the part symbol of the symbol of the 2nd time slot and the 3rd time slot, determine E-TFCI, at this moment, the symbol of E-DPCCH subframe the 1st time slot, the part symbol of the symbol of the 2nd time slot and the 3rd time slot is exactly a preceding 2N+M-1 symbol of this E-DPCCH subframe, wherein, N is the number of symbols of each time slot of E-DPCCH subframe, M is the number of pilot symbols of each slot transmission of DPCCH subframe, wherein, the concrete symbol according to this E-DPCCH subframe that is received is determined the detailed description of the mode of E-TFCI referring to method embodiment.Frequency pilot sign determining unit 23, specifically be used for when receiving 2N+M symbol of E-DPCCH subframe, according to the DPCCH subframe time slot of E-DPCCH subframe the 3rd slot synchronization in frequency pilot sign, determine the frequency pilot sign of E-DPCCH subframe the 3rd time slot, wherein, the mode of the frequency pilot sign of concrete definite E-DPCCH subframe the 3rd time slot is referring to the detailed description of method embodiment.

Power control command word determining unit 30 specifically comprises:

Signal-to-jamming ratio characterization value determining unit 31 is used for the noise energy estimated value according to described signal energy estimated value and described E-DPCCH subframe the 3rd time slot, determines the estimated value of the signal-to-jamming ratio characterization parameter of described E-DPCCH subframe the 3rd time slot; Wherein, the signal-to-jamming ratio characterization parameter can SIR, also can be SINR.Concrete, can determine the estimated value of the signal-to-jamming ratio characterization parameter of described E-DPCCH subframe the 3rd time slot according to the signal energy estimated value of E-DPCCH subframe the 3rd time slot and the noise energy estimated value of described E-DPCCH subframe the 3rd time slot.

Filter unit 32 is used to utilize the estimated value of following formula and described signal-to-jamming ratio characterization parameter, determines the actual value of the signal-to-jamming ratio characterization parameter of described E-DPCCH subframe the 3rd time slot;

y(n)＝x*(1-b)+y(n-1)*b

Wherein, b is a filter factor, and b is an empirical value that rule of thumb obtains, and b can be 0.6,0.9 etc.; N=1,2 or 3, x are the estimated value of the signal-to-jamming ratio characterization parameter of n time slot of E-DPCCH subframe; Y (n-1) is the actual value of the signal-to-jamming ratio characterization parameter of n-1 time slot of E-DPCCH subframe, and y (n) is the actual value of the signal-to-jamming ratio characterization parameter of n time slot of E-DPCCH subframe; Wherein, when n=1 or 2, x and y (n-1) are the actual value of signal-to-jamming ratio characterization parameter of the 3rd time slot of the previous E-DPCCH subframe of the described E-DPCCH subframe that receives of described base station;

Comparing unit 33 is used for the actual value and the threshold value of the signal-to-jamming ratio characterization parameter of more described E-DPCCH subframe the 3rd time slot, generates the power control command word of described E-DPCCH subframe the 3rd time slot.

The power control command word of embodiment of the invention power control apparatus preceding a-1 time slot in the period in cycle that subscriber equipment sends is the power control command word of presetting, so not the required power control appliance at each time slot rated output control command word all, thereby can make subscriber equipment adjust the transmitted power of next time slot timely, reduce the time delay that sends next time slot symbol.Further, power control apparatus is when 2N+M-1 symbol, just according to the sign computation E-TFCI of the E-DPCCH subframe that is received; When 2N+M symbol, just can be according to the symbol of the frequency pilot sign of E-DPCCH subframe the 3rd time slot and E-DPCCH subframe the 3rd time slot that is received, that determines E-DPCCH subframe the 3rd time slot has the number of believing one side only an Energy Estimation value, further generates power control command word.Like this, power control apparatus just can also not received fully at the symbol of E-DPCCH subframe the 3rd time slot and is just begun to carry out the correlation computations that generates power control command word, can further save the time delay that sends next time slot symbol.

Consult Fig. 5, the embodiment of the invention provides a kind of network system, and it comprises subscriber equipment 501 and power control apparatus 502, and wherein the 26S Proteasome Structure and Function of power control apparatus is identical with above-mentioned associated description embodiment illustrated in fig. 4, does not repeat them here.

Subscriber equipment is used for the power control command word that the received power control appliance sends, and adjusts transmitted power according to the power control command word that is received.

It will be appreciated by those skilled in the art that all or part of step that realizes in the foregoing description method is to instruct relevant hardware to finish by program, described program can be stored in a kind of computer-readable recording medium, read-only memory for example, disk or CD etc.

More than Poewr control method and power control apparatus that the embodiment of the invention provided are described in detail, used specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.

Claims (13)

1. a Poewr control method is characterized in that, comprising:

To subscriber equipment send preset period in the period before the power control command word of a-1 time slot, make subscriber equipment according to the power control command word regulated transmission power of a-1 time slot before described with identical according to the preceding transmitted power of the power control command word adjustment of the 1st time slot; Wherein, the described period in cycle comprises a time slot at least, and described a is greater than or equal to 3;

Obtain the signal energy estimated value of a time slot;

According to described signal energy estimated value, determine the power control command word of a time slot;

Send the power control command word of described a time slot to subscriber equipment.

2. method according to claim 1 is characterized in that,

Described a equals 3; A time slot is E-DPCCH subframe the 3rd time slot;

The described signal energy estimated value of obtaining a time slot comprises:

After receiving the part symbol of enhancing Dedicated Physical Data Channel E-DPCCH subframe the 3rd time slot that subscriber equipment sends, according to the symbol of described E-DPCCH subframe the 1st time slot, the symbol of the 2nd time slot and the part symbol of described the 3rd time slot, determine transformat combination indication E-TFCI;

According to the DPCCH subframe time slot of described E-DPCCH subframe the 3rd slot synchronization in frequency pilot sign, determine the frequency pilot sign of described E-DPCCH subframe the 3rd time slot;

According to the frequency pilot sign of described E-TFCI and described E-DPCCH subframe the 3rd time slot, determine the signal energy estimated value of E-DPCCH subframe the 3rd time slot.

3. method according to claim 2 is characterized in that,

Behind the described part symbol that receives E-DPCCH subframe the 3rd time slot that subscriber equipment sends,, determine E-TFCI, comprising according to the symbol of described E-DPCCH subframe the 1st time slot, the symbol of the 2nd time slot and the part symbol of described the 3rd time slot:

When receiving 2N+M-1 symbol of E-DPCCH subframe, according to 2N+M-1 symbol of the described E-DPCCH subframe that is received, determine E-TFCI, wherein, N is the number of symbols of each time slot of E-DPCCH subframe, and M is the number of pilot symbols of each slot transmission of DPCCH subframe.

4. method according to claim 3 is characterized in that,

Frequency pilot sign in the DPCCH subframe time slot of described basis and E-DPCCH subframe the 3rd slot synchronization, determine to comprise the frequency pilot sign of E-DPCCH subframe the 3rd time slot:

When receiving 2N+M symbol of E-DPCCH subframe, according to the DPCCH subframe time slot of E-DPCCH subframe the 3rd slot synchronization in frequency pilot sign, determine the frequency pilot sign of E-DPCCH subframe the 3rd time slot.

5. method according to claim 4 is characterized in that,

Described frequency pilot sign according to described E-TFCI and described E-DPCCH subframe the 3rd time slot, determine to comprise the signal energy estimated value of E-DPCCH subframe the 3rd time slot:

Obtain the pairing signal energy bias of described E-TFCI; Described signal energy bias is represented the biasing of the transmitted power of described E-DPCCH subframe with respect to the transmitted power of Dedicated Physical Data Channel DPCCH subframe;

According to the frequency pilot sign of E-DPCCH subframe the 3rd time slot and the symbol of the 3rd time slot that is received, determine the noise energy estimated value that the number of believing one side only Energy Estimation value and E-DPCCH subframe the 3rd time slot are arranged of E-DPCCH subframe the 3rd time slot;

According to described the poor of the number of believing one side only Energy Estimation value and noise energy estimated value arranged, and described signal energy bias, the signal energy estimated value of acquisition E-DPCCH subframe the 3rd time slot.

6. method according to claim 2 is characterized in that,

Described according to described signal energy estimated value, determine the power control command word of a time slot, comprising:

According to the noise energy estimated value of described signal energy estimated value and described E-DPCCH subframe the 3rd time slot, determine the estimated value of the signal-to-jamming ratio characterization parameter of described E-DPCCH subframe the 3rd time slot;

Utilize the estimated value of following formula and described signal-to-jamming ratio characterization parameter, determine the actual value of the signal-to-jamming ratio characterization parameter of described E-DPCCH subframe the 3rd time slot;

y(n)＝x*(1-b)+y(n-1)*b

Wherein, b is a filter factor; N=1,2 or 3, x are the estimated value of the signal-to-jamming ratio characterization parameter of n time slot of E-DPCCH subframe; Y (n-1) is the actual value of the signal-to-jamming ratio characterization parameter of n-1 time slot of E-DPCCH subframe, and y (n) is the actual value of the signal-to-jamming ratio characterization parameter of n time slot of E-DPCCH subframe; Wherein, when n=1 or 2, x and y (n-1) are the actual value of the signal-to-jamming ratio characterization parameter of the 3rd time slot of the previous E-DPCCH subframe of the described E-DPCCH subframe of base station reception;

The actual value and the threshold value of the signal-to-jamming ratio characterization parameter of more described E-DPCCH subframe the 3rd time slot generate the power control command word of described E-DPCCH subframe the 3rd time slot.

7. a power control apparatus is characterized in that, comprising:

Preserve the unit, be used to preserve the power control command word of preceding a-1 time slot in the preset period period; Wherein, the described period in cycle comprises a time slot at least, and described a is greater than or equal to 3;

Signal energy estimated value acquiring unit is used to obtain the signal energy estimated value of a time slot;

The power control command word determining unit is used for determining the power control command word of a time slot according to described signal energy estimated value;

Transmitting element, the power control command word of a-1 time slot before being used in subscriber equipment sends the described period in cycle, make subscriber equipment according to the power control command word regulated transmission power of a-1 time slot before described with identical according to the preceding transmitted power of the power control command word adjustment of the 1st time slot; Send the power control command word of described a time slot to subscriber equipment.

8. power control apparatus according to claim 7 is characterized in that,

Described a equals 3; A time slot is E-DPCCH subframe the 3rd time slot;

Described signal energy estimated value acquiring unit comprises:

The E-TFCI determining unit, after being used to receive the part symbol of enhancing Dedicated Physical Data Channel E-DPCCH subframe the 3rd time slot that subscriber equipment sends, according to the symbol of described E-DPCCH subframe the 1st time slot, the symbol of the 2nd time slot and the part symbol of described the 3rd time slot, determine transformat combination indication E-TFCI;

The frequency pilot sign determining unit, be used for according to the frequency pilot sign of the DPCCH subframe time slot of E-DPCCH subframe the 3rd slot synchronization, determine the frequency pilot sign of E-DPCCH subframe the 3rd time slot;

Signal energy estimated value determining unit is used for the frequency pilot sign according to described E-TFCI and described E-DPCCH subframe the 3rd time slot, determines the signal energy estimated value of E-DPCCH subframe the 3rd time slot.

9. power control apparatus according to claim 8 is characterized in that,

Described E-TFCI determining unit, specifically be used for when receiving 2N+M-1 symbol of E-DPCCH subframe, 2N+M-1 symbol according to the described E-DPCCH subframe that is received, determine E-TFCI, wherein, N is the number of symbols of each time slot of E-DPCCH subframe, and M is the number of pilot symbols of each slot transmission of DPCCH subframe.

10. power control apparatus according to claim 9 is characterized in that,

Described frequency pilot sign determining unit is used for when receiving 2N+M symbol of E-DPCCH subframe, according to the DPCCH subframe time slot of E-DPCCH subframe the 3rd slot synchronization in frequency pilot sign, determine the frequency pilot sign of E-DPCCH subframe the 3rd time slot.

11. power control apparatus according to claim 10 is characterized in that,

Described signal energy estimated value determining unit comprises:

First acquiring unit is used to obtain the pairing signal energy bias of described E-TFCI; Described signal energy bias is represented the biasing of the transmitted power of described E-DPCCH subframe with respect to the transmitted power of Dedicated Physical Data Channel DPCCH subframe;

Second acquisition unit, be used for determining the noise energy estimated value that the number of believing one side only Energy Estimation value and described E-DPCCH subframe the 3rd time slot are arranged of described E-DPCCH subframe the 3rd time slot according to the frequency pilot sign of described E-DPCCH subframe the 3rd time slot and the symbol of the 3rd time slot that is received; According to described the poor of the number of believing one side only Energy Estimation value and noise energy estimated value arranged, and described signal energy bias, obtain the signal energy estimated value of described E-DPCCH subframe the 3rd time slot.

12. power control apparatus according to claim 8 is characterized in that,

Described power control command word determining unit comprises:

Signal-to-jamming ratio characterization value determining unit is used for the noise energy estimated value according to described signal energy estimated value and described E-DPCCH subframe the 3rd time slot, determines the estimated value of the signal-to-jamming ratio characterization parameter of described E-DPCCH subframe the 3rd time slot;

Filter unit is used to utilize the estimated value of following formula and described signal-to-jamming ratio characterization parameter, determines the actual value of the signal-to-jamming ratio characterization parameter of described E-DPCCH subframe the 3rd time slot;

y(n)＝x*(1-b)+y(n-1)*b

Wherein, b is a filter factor, and n=1,2 or 3, x are the estimated value of the signal-to-jamming ratio characterization parameter of n time slot of E-DPCCH subframe; Y (n-1) is the actual value of the signal-to-jamming ratio characterization parameter of n-1 time slot of E-DPCCH subframe, and y (n) is the actual value of the signal-to-jamming ratio characterization parameter of n time slot of E-DPCCH subframe; Wherein, when n=1 or 2, x and y (n-1) are the actual value of signal-to-jamming ratio characterization parameter of the 3rd time slot of the previous E-DPCCH subframe of the described E-DPCCH subframe that receives of described base station;

Comparing unit is used for the actual value and the threshold value of the signal-to-jamming ratio characterization parameter of more described E-DPCCH subframe the 3rd time slot, generates the power control command word of described E-DPCCH subframe the 3rd time slot.

13. a system is characterized in that, comprising: described each power control apparatus of claim 7-12 and subscriber equipment, wherein,

Described subscriber equipment is used to receive the power control command word that described power control apparatus sends, and adjusts transmitted power according to the power control command word that is received.

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