CN105592538A - Power control method and apparatus of physical uplink shared channel - Google Patents
Power control method and apparatus of physical uplink shared channel Download PDFInfo
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Abstract
The application discloses a power control method and apparatus of a physical uplink shared channel (PUSCH). The method comprises: at each scheduling sub frame, a base station carries out statistics on an average UE number value of single scheduling among latest F scheduling; when the average UE number value changes and the changing amplitude is larger than a preset threshold value a, a maximum number Nmax of resource blocks that can be distributed to the UE is updated based on the current statistical average UE number value S; an F is a preset scheduling number times threshold value, wherein the F is larger than or equal to 1 and the a is larger than or equal to 0; and according to the current maximum number Nmax, the PUSCH resources are configured for the current scheduling UE. For each UE, when the PHR reported by the UE is not larger than 0, the base station adjusts a target SINR of the UE based on a current road loss value of the UE. For each UE, the base station adjusts the PRB of the PUSCH of the UE according to the receiving SINR reported by the UE and the current target SINR of the UE and the UE is notified. Therefore, the demand of the data rate of the terminal can be satisfied.
Description
Technical field
The present invention relates to mobile communication technology, particularly relate to the power of a kind of Physical Uplink Shared Channel (PUSCH)Control method and device.
Background technology
In LTE system, one of object of PUSCH power control is to ensure ul transmissions quality, is embodied asThe transfer rate of terminal.
The power spectral density P of base station control terminal in LTE systemRB, i.e. transmitted power on single resource piece (RB),Terminal takies RB number while carrying out uplink be N, and the general power of transmission is N × PRB, on each RB, transmit meritThe identical P that is of rateRB. LTE system PUSCH power control mechanism is: according to the reception Signal to Interference plus Noise Ratio of PUSCH(SINR) and the differential state of target SINR adjust terminal power, when the reception SINR of PUSCH is less than target SINRTime, base station will promote the power spectral density P of terminalRB, terminal sends general power N × PRBAlso will increase, due to terminal meritRate is limited, and terminal sends general power and is limited to maximum transmit power PCMAX, i.e. N × PRB≤PCMAX。
When LTE system adopts identical networking scheme, when transmitting uplink data, minizone exists serious phase mutual interference,Due to the existence of disturbing, terminal transmit power spectral density PRBNeed to very highly can reach its desired value SINR. Meanwhile,System dispatch terminal be its while being configured for the RB resource of uplink, be according to the basis meeting terminal needsOn as far as possible for principle of its configuration RB is carried out. Like this, described N will take situation and become along with system resourceChange, in the time that N changes greatly, the transmission general power N × P of terminalRBAlso will change comparatively fast, so will cause terminalThe variation of reception SINR also very fast, and system is to carry out the modulating-coding of control terminal according to the reception SINR of terminal(AMC) mode, the variation of terminal reception SINR will cause the adjustment of the modulation coding mode of system to terminal,Therefore, the quick variation of terminal reception SINR can cause that system is subject to the impact of AMC hardware handles ability and cannot carries outThe corresponding AMC in ground adjusts, thereby can affect AMC performance, finally causes the speed of terminal influenced.
As can be seen here, in the power control scheme of existing PUSCH, there is the lance of terminal scheduling and terminal power controlShield, thus cannot meet the demand of terminal data speed.
Summary of the invention
In view of this, main purpose of the present invention is to provide Poewr control method and the device of a kind of PUSCH, canTo meet the demand of terminal data speed.
In order to achieve the above object, the technical scheme that the present invention proposes is:
A kind of Physical Uplink Shared Channel Poewr control method, comprising:
In each scheduling subframe, base station eNB is added up the user equipment (UE) quantity of single scheduling in nearest F scheduling and is put downAverage, and change and when amplitude of variation is greater than predetermined threshold value a, according to current system at described UE quantity mean valueThe described UE quantity mean value S that meter arrives, renewal can be the maximum quantity N of UE distributes resource blocksmax, described FFor default scheduling times threshold value, F >=1, a >=0; According to current described maximum quantity Nmax, for current schedulingUE configures physical Uplink Shared Channel PUSCH resource;
For each described UE, when the power headroom PHR reporting as this UE is not more than zero, base station is according to this UECurrent circuit loss value, adjusts the target Signal to Interference plus Noise Ratio SINR of this UE;
For each described UE, the reception SINR that described base station reports according to this UE and the current target of this UESINR, the power spectral density P of the PUSCH to described UERBAdjust, and notice is to described UE.
A kind of Physical Uplink Shared Channel output control device, comprising:
Resource configuration unit, in each scheduling subframe, the user of single scheduling in nearest F the scheduling of accounting base-stationEquipment UE quantity mean value, and change and amplitude of variation is greater than predetermined threshold value a at described UE quantity mean valueTime, according to the current described UE quantity mean value S counting on, renewal can be the maximum quantity of UE distributes resource blocksNmax, described F is default scheduling times threshold value, F >=1, a >=0; According to current described maximum quantity Nmax，For the UE configures physical Uplink Shared Channel PUSCH resource of current scheduling;
Adjustment unit, for for each described UE, when the power headroom PHR reporting as this UE is not more than zero,The circuit loss value current according to this UE, adjusts the target Signal to Interference plus Noise Ratio SINR of this UE; Described in eachUE, the reception SINR reporting according to this UE and the current target SINR of this UE, to the PUSCH of described UEPower spectral density PRB adjust, and notice to described UE.
In sum, Poewr control method and the device of the PUSCH that the present invention proposes, on the one hand, in dispatched usersWhen number change, according to the UE quantity mean value S of the current single scheduling counting on, can distribute RB to the maximum of UEQuantity is dynamically adjusted, and makes maximum can distribute the value actual schedule situation phase current with system of RB quantityJoin; On the other hand, in the time that the situation of power limited occurs UE, adjust its target SINR according to the path loss information of UEValue, matches target SINR value and practical communication quality. From above-mentioned two aspects, by controlling UECan distribute greatly RB quantity and target SINR value, can make the reception SINR of UE keep stable, and then can reduceThe adjustment of AMC mode, reduces the impact on AMC performance, meets the data-rate requirements of UE.
Brief description of the drawings
Fig. 1 is the method flow schematic diagram of the embodiment of the present invention one;
Fig. 2 is the apparatus structure schematic diagram of the embodiment of the present invention one.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing and specifically enforcementThe present invention is described in further detail for example.
Core concept of the present invention is: on the one hand, system is by the maximum to UE according to the variation of dispatched users quantityCan distribute RB quantity dynamically to adjust, make maximum can distribute the value of RB quantity and the current reality of systemScheduling situation matches, the transmission total work of the terminal being caused when avoiding RB quantity N for UE configuration excessiveRate N × PRBVariation excessive, thereby can avoid N × PRBVariation when excessive cause the reception SINR of UEVariation; On the other hand, in the time that the situation of power limited occurs UE, adjust its order according to the path loss information of UEMark SINR value, matches target SINR value and practical communication quality, so, can guarantee the merit of UERate spectrum density is controlled, and the interference stability of system is conducive to promote AMC performance. From above-mentioned two aspects,Can distribute RB quantity and target SINR value by the maximum of controlling UE, can make the reception SINR of UE protectKeep steady fixed, and then can reduce the adjustment of AMC mode, reduce the impact on AMC performance, meet UE'sData-rate requirements.
Fig. 1 is the PUSCH Poewr control method schematic flow sheet of the embodiment of the present invention one, as shown in Figure 1, and shouldEmbodiment mainly comprises:
Step 101, in each scheduling subframe, the user that base station (eNB) adds up single scheduling in nearest F scheduling establishesStandby UE quantity mean value, and change and when amplitude of variation is greater than predetermined threshold value a at described UE quantity mean value,According to the current UE quantity mean value S counting on, renewal can be the maximum quantity N of UE distributes resource blocksmax，Described F is default scheduling times threshold value, F >=1, a >=0; According to current described maximum quantity Nmax, for currentThe UE configures physical Uplink Shared Channel PUSCH resource of scheduling.
In this step, when the user equipment (UE) quantity mean value of single scheduling changes and amplitude of variation is greater than defaultWhen threshold value a, by the UE quantity mean value S dispatching according to the current single counting on, renewal can be that UE distributes moneyThe maximum quantity N of source piecemax. So, can guarantee can be current for maximum quantity and the system of UE distributes resource blocksActual schedule situation match, the transmission of the terminal being caused when avoiding RB quantity N for UE configuration excessiveGeneral power N × PRBAmplitude of variation excessive, thereby can avoid N × PRBVariation when excessive cause the reception of UEThe variation of SINR, makes the reception SINR of UE keep stable, and then can reduce the adjustment of AMC mode, reducesOn the impact of AMC performance, meet the data-rate requirements of UE.
Particularly, can be larger according to described UE quantity mean value S, can be the maximum number of UE distributes resource blocksAmount NmaxLess principle, upgrades described Nmax。
Preferably, based on mentioned above principle, can be according to Nmax=W/S, renewal can be the maximum of UE distributes resource blocksQuantity Nmax, wherein, the PUSCH Resource Block sum that described W is system. In actual applications, be not limited toState method Nmax=W/S, as long as meet mentioned above principle.
Preferably, described F and described a are predetermined threshold value, particularly can be by those skilled in the art according to actual needsArrange, do not repeat them here.
Step 102, for each described UE, when the power headroom PHR reporting as this UE is not more than zero, base station rootAccording to the current circuit loss value of this UE, the target Signal to Interference plus Noise Ratio SINR of this UE is adjusted.
In this step, when the power headroom PHR reporting as this UE is not more than zero, illustrate that power limited occurs UESituation, now, will adjust its target SINR value according to the circuit loss value of UE, so that target SINR value is with actual logicalLetter quality matches. So, can guarantee that the power spectral density of UE is controlled, the interference stability of system, is conducive to carryRise AMC performance.
Preferably, can adopt following step to adjust the target Signal to Interference plus Noise Ratio SINR of UE:
Step x1, calculate the difference DELTA L of the current circuit loss value of described UE and previous circuit loss value.
In this step, the same existing system of concrete acquisition methods of UE circuit loss value, does not repeat them here.
Difference DELTA L described here will reflect UE path loss situation of change, in subsequent step, will carry out order based on thisThe adjustment of mark SINR value.
Step x2, utilize described difference DELTA L, former according to the target SINR value of UE and the changing inversely of path loss information, calculate the adjustment amount Δ SINR that carries out described adjustment.
In this step, according to the principle of the target SINR value of UE and the changing inversely of path loss information, described in calculating is carried outThe adjustment amount Δ SINR adjusting.
Adopt mentioned above principle can make the reception SINR of UE keep stable, and then can avoid affecting AMC performance.Particularly: in communication quality variation, according to existing PRBControl method, receives SINR and is less than target SINRTime, will promote PRB, therefore, in the limited situation of the transmission general power of terminal, now limit RB and distribute maximum numberCan trigger as much as possible the power spectral density P to terminalRBLifting, thereby can ensure the communication quality of UE, makeIt is stable that the reception SINR of UE keeps, and then can avoid affecting AMC performance; Lower target SINR simultaneously, makeObtain target SINR and be consistent with reception SINR, make terminal receptivity in slave mode, once communication qualityWhen improving, progressively increase target SINR value, receiving SINR also increases gradually with target SINR, thereby canThe power spectral density of guaranteeing UE is controlled, and the interference stability of system is conducive to promote AMC performance. Preferably, this stepSuddenly can, according to Δ SINR=b × Δ L+c, calculate described Δ SINR, wherein, b is the first adjustment coefficient of presetting,-1<b < 0, c is the second adjustment coefficient of presetting, c>=0.
Step x3, according to SINRnew＝ΔSINR+SINRold, the target Signal to Interference plus Noise Ratio SINR after being adjustednew，Wherein, SINRoldFor the target Signal to Interference plus Noise Ratio before adjusting.
Step 103, for each described UE, the reception SINR that described base station reports according to this UE and this UE work asFront target SINR, the power spectral density P of the PUSCH to described UERBAdjust, and notice is to described UE.
The same existing system of concrete methods of realizing of this step, does not repeat them here.
Fig. 2 is the apparatus structure schematic diagram corresponding with said method, as shown in Figure 2, and this Physical Uplink Shared ChannelOutput control device comprises:
Resource configuration unit, in each scheduling subframe, the user of single scheduling in nearest F the scheduling of accounting base-stationEquipment UE quantity mean value, and change and amplitude of variation is greater than predetermined threshold value a at described UE quantity mean valueTime, according to the current described UE quantity mean value S counting on, renewal can be the maximum quantity of UE distributes resource blocksNmax, described F is default scheduling times threshold value, F >=1, a >=0; According to current described maximum quantity Nmax，For the UE configures physical Uplink Shared Channel PUSCH resource of current scheduling.
Adjustment unit, for for each described UE, when the power headroom PHR reporting as this UE is not more than zero,The circuit loss value current according to this UE, adjusts the target Signal to Interference plus Noise Ratio SINR of this UE; Described in eachUE, the reception SINR reporting according to this UE and the current target SINR of this UE, to the PUSCH of described UEPower spectral density PRBAdjust, and notice is to described UE.
Preferably, described resource configuration unit, be further used for according to described UE quantity mean value S larger, canFor the maximum quantity N of UE distributes resource blocksmaxLess principle, renewal can be the maximum number of UE distributes resource blocksAmount Nmax。
Preferably, described resource configuration unit, is further used for according to Nmax=W/S, renewal can distribute money for UEThe maximum quantity N of source piecemax, wherein, the PUSCH Resource Block sum that described W is system.
Preferably, described adjustment unit, is further used for calculating the current circuit loss value of described UE and previous path lossThe difference DELTA L of value; Utilize described difference DELTA L, according to the target SINR value of UE and the changing inversely of path loss informationPrinciple, calculates the adjustment amount Δ SINR that carries out described adjustment; According to SINRnew＝ΔSINR+SINRold, be adjustedAfter target Signal to Interference plus Noise Ratio SINRnew, wherein, SINRoldFor the target Signal to Interference plus Noise Ratio before adjusting.
Preferably, described adjustment unit, is further used for, according to Δ SINR=b × Δ L+c, calculating described Δ SINR,Wherein, b is the first adjustment coefficient of presetting ,-1<b < 0, and c is the second adjustment coefficient of presetting, c>=0.
In sum, these are only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any amendment of doing, be equal to replacement, improvement etc., all should be included in thisWithin the protection domain of invention.
Claims (10)
1. a Physical Uplink Shared Channel Poewr control method, is characterized in that, comprising:
In each scheduling subframe, base station eNB is added up the user equipment (UE) quantity of single scheduling in nearest F scheduling and is put downAverage, and change and when amplitude of variation is greater than predetermined threshold value a, according to current system at described UE quantity mean valueThe described UE quantity mean value S that meter arrives, renewal can be the maximum quantity N of UE distributes resource blocksmax; Described FFor default scheduling times threshold value, F >=1, a >=0; According to current described maximum quantity Nmax, for current schedulingUE configures physical Uplink Shared Channel PUSCH resource;
For each described UE, when the power headroom PHR reporting as this UE is not more than zero, base station is according to this UECurrent circuit loss value, adjusts the target Signal to Interference plus Noise Ratio SINR of this UE;
For each described UE, the reception SINR that described base station reports according to this UE and the current target of this UESINR, the power spectral density P of the PUSCH to described UERBAdjust, and notice is to described UE.
2. method according to claim 1, is characterized in that, larger according to described UE quantity mean value S,Can be the maximum quantity N of UE distributes resource blocksmaxLess principle, renewal can be UE distributes resource blocksLarge quantity Nmax。
3. method according to claim 2, is characterized in that, according to Nmax=W/S, renewal can be UEThe maximum quantity N of distributes resource blocksmax, wherein, the PUSCH Resource Block sum that described W is system.
4. method according to claim 1, is characterized in that, the described target Signal to Interference plus Noise Ratio SINR to this UEAdjust and comprise:
Calculate the difference DELTA L of the current circuit loss value of described UE and previous circuit loss value;
Utilize described difference DELTA L, according to the principle of the target SINR value of UE and the changing inversely of path loss information, calculateCarry out the adjustment amount Δ SINR of described adjustment;
According to SINRnew＝ΔSINR+SINRold, the target Signal to Interference plus Noise Ratio SINR after being adjustednew, wherein, SINRoldFor the target Signal to Interference plus Noise Ratio before adjusting.
5. method according to claim 4, is characterized in that, according to Δ SINR=b × Δ L+c, described in calculatingΔ SINR, wherein, b is the first adjustment coefficient of presetting ,-1<b < 0, c is the second adjustment coefficient of presetting, c>=0.
6. a Physical Uplink Shared Channel output control device, is characterized in that, comprising:
Resource configuration unit, in each scheduling subframe, the user of single scheduling in nearest F the scheduling of accounting base-stationEquipment UE quantity mean value, and change and amplitude of variation is greater than predetermined threshold value a at described UE quantity mean valueTime, according to the current described UE quantity mean value S counting on, renewal can be the maximum quantity of UE distributes resource blocksNmax, described F is default scheduling times threshold value, F >=1, a >=0; According to current described maximum quantity Nmax，For the UE configures physical Uplink Shared Channel PUSCH resource of current scheduling;
Adjustment unit, for for each described UE, when the power headroom PHR reporting as this UE is not more than zero,The circuit loss value current according to this UE, adjusts the target Signal to Interference plus Noise Ratio SINR of this UE; Described in eachUE, the reception SINR reporting according to this UE and the current target SINR of this UE, to the PUSCH of described UEPower spectral density PRBAdjust, and notice is to described UE.
7. device according to claim 6, is characterized in that, described resource configuration unit, be further used for byLarger according to described UE quantity mean value S, can be the maximum quantity N of UE distributes resource blocksmaxLess principle,Renewal can be the maximum quantity N of UE distributes resource blocksmax。
8. device according to claim 7, is characterized in that, described resource configuration unit, be further used for byAccording to Nmax=W/S, renewal can be the maximum quantity N of UE distributes resource blocksmax, wherein, described W is systemPUSCH Resource Block sum.
9. device according to claim 6, is characterized in that, described adjustment unit is further used for calculating instituteState the difference DELTA L of the current circuit loss value of UE and previous circuit loss value; Utilize described difference DELTA L, according to the order of UEThe principle of mark SINR value and the changing inversely of path loss information, calculates the adjustment amount Δ SINR that carries out described adjustment; According toSINRnew＝ΔSINR+SINRold, the target Signal to Interference plus Noise Ratio SINR after being adjustednew, wherein, SINRoldFor adjustingTarget Signal to Interference plus Noise Ratio before whole.
10. device according to claim 9, is characterized in that, described adjustment unit, be further used for according toΔ SINR=b × Δ L+c, calculates described Δ SINR, and wherein, b is the first adjustment coefficient of presetting ,-1 <b < 0, cFor the second default adjustment coefficient, c >=0.
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