CN1428947A - Power control method of high-speed physical control channel in high-speed data access system - Google Patents
Power control method of high-speed physical control channel in high-speed data access system Download PDFInfo
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Abstract
The present invention discloses a power control method of high-speed physical control channel in high-speed data access system. Said method is characterized by that according to the different network environment of UE and its state and its transferred data it can define the adoption of different biased power to regulate the transmission power of HS-DPCCH channel on the basis of original special-purpose channel power control, so that it can more really reflect the requirements of HS-DPCCH chanel for transmission power so as to make the information of HS-DPCCH channel can be correctly received by base station, therefore said invention has higher powre control accuracy of HS-DPCCH channel.
Description
Technical field
The present invention relates to the Poewr control method in the wireless communication system, be specifically related to the Poewr control method of the high-speed physical control channel in the high-speed data access system.
Background technology
For adapting to the demand of wireless high-speed data business development, introduced down high-speed data access (HSDPA) technology in 3-G (Generation Three mobile communication system), the key of this technology is to adopt mixing to retransmit (HARQ) and adaptive modulation and coding technology (AMC) automatically the transmission of data is controlled.The base station sends data for subscriber equipment (UE), and UE is according to affirmation or the non-acknowledge message of the quality that receives data to the base station feedback Data Receiving, and whether the base station retransmits according to the feedback decision corresponding data of UE.Because the modulation and the coded system of downlink data need change according to the condition of down channel, are the variation of adaptive channel better, the quality condition of down channel also needs UE to feed back to the base station according to the measurement to channel.In existing HSDPA system, the feedback of above-mentioned information transmits by increase a uplink high-speed special physical control channel (HS-DPCCH) in existing 3-G (Generation Three mobile communication system) REL99 version system, for improving the service efficiency and the data transmission efficiency of system resource, need carry out power control to the HS-DPCCH channel.But in existing high-speed data system, only use original two dedicated channels that are used, be that special uplink channel and downlink dedicated channels are carried out power control, do not cooperate the down channel that carries out power control, cause the uplink power control of this channel to go wrong with the HS-DPCCH channel that increases newly.Because HS-DPCCH channel and original special uplink channel are the Code Channels that is sent by same UE, therefore its channel condition is identical, promptly the noise that receives in some moment signal to noise ratios can be thought identical with link gain, promptly two dedicated channels of the variation tendency of the signal to noise ratio of Jie Shouing (SIR) are identical, and it is identical that just the power of uplink closed loop is adjusted trend.Therefore, the power adjustment of HS-DPCCH channel can be used the power control command information (TPC) of the downlink dedicated channels that original special uplink channel is used.But the spreading factor of HS-DPCCH channel and original special uplink channel, carrying the coded system of information all might be different with processing mode under case of soft handover, therefore the setting of signal to noise ratio (SIR) also may be different in exterior ring power control, even the adjustment of carrying out transmitting power according to same trend also possibly can't reach the requirement of HS-DPCCH channel signal to noise ratio (SIR).The Poewr control method of existing HS-DPCCH channel is to make the HS-DPCCH channel increase a fixing bias power on the transmitting power basis of original special uplink channel.But use this method bigger than normal the causing of power disturb to be increased, or power is on the low side can't reach the correct requirement that receives of information, the power control precision that therefore adopts existing method to carry out the HS-DPCCH channel is lower.
Summary of the invention
The object of the present invention is to provide the Poewr control method of the higher high-speed data access system high speed physical control channel of a kind of precision.
For achieving the above object, the Poewr control method of high-speed data access system high speed physical control channel provided by the invention comprises:
(1) network side when setting up, is determined bias power P10, P20 and merging power gain P according to current channel condition at up-high speed physical control channel (HS-DPCCH)
H0, P10 and P20 are handed down to UE as the bias power P1 and the P2 of HS-DPCCH channel emission power respectively, will merge power gain P simultaneously
H0Bias power P as the HS-DPCCH channel emission power
HBe handed down to UE, wherein,
P1 be downlink channel measurement information coding gain and spreading gain and, P2 be acknowledge message coding gain and spreading gain with;
After the HS-DPCCH channel is set up,
(2) network side redefines current bias power P11 and P21 according to current channel condition, if corresponding bias power P1 that current bias power P11 and P21 and UE are current and the difference of P2 surpass the threshold value of regulation, P11 and P21 are handed down to UE as the bias power P1 and the P2 of HS-DPCCH channel emission power respectively;
(3) network side judges whether UE is in soft changing state, if network side redefines current merging power gain P according to current channel condition
H1If, current merging power gain P
H1The merging power gain P current with UE
HDifference surpass the threshold value of regulation, will merge power gain P
H1Bias power P as the HS-DPCCH channel emission power
HAgain be handed down to UE;
(4) UE judges the current soft changing state that whether is in, if change step (6), otherwise change step (5);
(5) UE judges the information of current needs by the HS-DPCCH channel feedback, if the metrical information of down high speed sharing channel (HS-DSCH), then the HS-DPCCH channel emission power be special physical controlling channel of upward (DPCCH) transmitting power and bias power P1's and; If the affirmation information of HS-DSCH, then the HS-DPCCH channel emission power be DPCCH transmitting power and bias power P2's and, change step (7) then;
(6) UE judges the information of current needs by the HS-DPCCH channel feedback, if the metrical information of down high speed sharing channel (HS-DSCH), then the HS-DPCCH channel emission power is the transmitting power and the bias power P1 of special physical controlling channel of upward (DPCCH) and merges power gain P
HAnd; If the affirmation information of HS-DSCH channel, then the HS-DPCCH channel emission power be DPCCH transmitting power and bias power P2's and merge power gain P
HAnd, change step (7) then;
(7) above-mentioned steps (2) repeats to step (6), removes up to the HS-DPCCH channel.
Above-mentioned steps also comprises in (1): network side is provided with the threshold value of bias power P1 and P2 variation and merges power gain P according to the equilibrium of signaling traffic load and power setting effect
H0The threshold value that changes.
Because the present invention is on the basis that original dedicated channel power is adjusted, according to the residing different network environments of UE, determine to adopt different bias powers that the HS-DPCCH channel transmitting power is adjusted on original dedicated channel power control basis, more can truly reflect the demand of HS-DPCCH channel to transmitting power, the information of HS-DPCCH channel can correctly be received by the base station, therefore, the present invention has the power control precision of higher H S-DPCCH channel.
Description of drawings
Fig. 1 is the embodiment flow chart of the inventive method;
Fig. 2 is that UE is in normal condition lower network link model figure;
Fig. 3 is that UE is in More Soft Handoff situation lower network link model figure;
Fig. 4 is that UE is in case of soft handover lower network link model figure;
Fig. 5 is the channel target frame error rate under the different coding mode and the graph of a relation of signal to noise ratio;
Fig. 6 is the channel target frame error rate under the different spreading factors and the graph of a relation of signal to noise ratio;
Fig. 7 is that different numbers connect the channel target frame error rate under merging and the graph of a relation of signal to noise ratio.
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing.
In the down high speed connecting system (HSDPA),, must increase a up Dedicated Physical Control Channel (HS-DPCCH) and transmit relevant up signaling in order to realize mixing automatic re-transmission and adaptive modulation and coding technology.The trend of HS-DPCCH power adjustment is identical with original dedicated channel, but the coded system of spreading factor, information is all different with processing mode under soft handover.Therefore, the present invention adds the bias power of each different disposal gain on the basis that original dedicated channel power is adjusted, the information of HS-DPCCH channel can correctly be received by the base station.
Because the present invention adds different bias powers on the basis of original power adjustment, therefore need analyze the residing different network environments of UE.
Neither be in the normal condition of soft handover and More Soft Handoff for UE, UE is connected with a sub-district in the base station, with reference to figure 2.In this case, original special physical controlling channel of upward DPCCH and the special physical controlling channel of upward HS-DPCCH that increases newly are that a sub-district by a base station receives two unique spreading factor and coded systems of not being both of channel.The relation of information frame error rate (FER) and signal to noise ratio (SIR) is with reference to figure 5 and Fig. 6 under different coding mode and the spreading factor.
The target SIR that can be obtained original special uplink channel target frame error rate FER_DPCCH correspondence by Fig. 5 is SIR_DPCCH, and the target SIR of the special uplink channel target frame error rate FER_HS-DPCCH correspondence that increases newly is SIR_HS-DPCCH.Since target frame error rate (FER) difference of two channels, the coding mode information difference.
Its target signal to noise ratio difference is:
SIRdiff sign indicating number=SIR_HS-DPCCH-SIR_DPCCH=(P_HS-DPCCH
*Link power gain 1)/N1-(P_DPCCH1
*Link power gain 2)/N2;
Above-mentioned link power gain 1, link power gain 2 and N1, N2 are respectively the link power gain and the noise of HS-DPCCH channel and DPCCH channel.
Because HS-DPCCH channel and DPCCH channel is code division multiplexing, its information is sent by same UE, therefore channel conditions such as noise, decline are identical, promptly the noise that receives in some moment signal to noise ratios and link gain can be thought identically, so its channel condition can be thought identical.Therefore, noise N1, N2 equate with the pairing noise N0 of target signal to noise ratio difference under the different coding mode, i.e. N1=N2=N0; Equally, the gain of link power gain 1=link power gain 2=link power 0.Link power gain 0 is the pairing link power gain of target signal to noise ratio difference under the different coding mode.Therefore
SIRdiff coding=SIR_HS-DPCCH-SIR_DPCCH1=((P_HS-DPCCH-P_DPCCH1)
*Link power gain 0)/N0;
Obtain thus:
P coding gain=P_HS-DPCCH-P_DPCCH=(SIRdiff coding
*N0)/link power gain 0;
Same reckoning also can obtain for different spreading factors:
P spreading factor gain=(SIRdiff spreading factor
*N0)/link power gain 0;
By top analysis as can be known, neither be in the UE terminal under the situation of More Soft Handoff and soft handover, the transmitting power of some moment special physical controlling channel of upward HS-DPCCH needs to increase the biasing of " P coding gain " and " P spreading gain " these two power than original special physical controlling channel of upward DPCCH.
For the situation of UE More Soft Handoff, UE is connected with a plurality of sub-districts that belong to a base station, with reference to figure 3.In this case, because the information of up channel merges in the receiver of base station, merge and generation to merge gain.Can see this gain in the graph of a relation of frame error rate (FER) and signal to noise ratio (SIR) under different numbers connections merge from Fig. 7, merge gain and coded system, spreading factor and have nothing to do only relation is arranged with the number that is connected.
With reference to figure 7.As can see from Figure 7, under the situation of More Soft Handoff, up channel is sent by same terminal, can promptly activate the sub-district and receive by being positioned at the inner different districts in a base station (NODEB), think promptly that this up channel and sub-district are in connection status this moment, n is meant the linking number of up channel and sub-district, n=1 represents that the number that connects is 1, refers to that UE also is not in the More Soft Handoff state, and n＞1 expression is in the More Soft Handoff state.
Abscissa is the signal to noise ratio of channel among the figure, and ordinate is the frame error rate (FER) that channel is in certain signal to noise ratio.
So-called merging gain is meant, reach the poor of same frame error rate signal to noise ratio.As: when abscissa reached desired value FER-DPCCH, signal to noise ratio corresponding on the n=1 line was SIR4, and signal to noise ratio corresponding on the N=4 line is SIR1.Promptly reach same target frame error rate, poor signal to noise is: SIRdiff=SIR4-SIR1.When being n=4, merging can reduce frame error rate because many of same information vias connect the classification reception, and the signal to noise ratio that therefore reaches same its requirement of frame error rate is lower, and the transmitting power of requirement is also smaller, can think to have produced a gain.
Be under the situation of More Soft Handoff, the information of HS-DPCCH and original DPCCH all can merge in the base station, and the annexation of both and sub-district is identical, and therefore this gain is identical to two special uplink channels.So the situation in More Soft Handoff is identical with the gain that UE is under the normal condition, the HS-DPCCH channel transmitting power than the transmitting power of original special physical controlling channel of upward DPCCH need to increase " P coding gain " and " P spreading gain " these two power gains and, and do not need to consider to merge to gain.
Be in the situation of soft handover for UE, UE is connected with a plurality of sub-districts that belong to different base station in this case, with reference to figure 4.
For original special physical controlling channel of upward DPCCH, the information of its exterior ring power control target setting SIR merges in radio network controller (RNC).Use in the time of scheduling because the information of HS-DPCCH channel is the base station, it is oversize to issue time of delay again by RNC after merging, so in RNC, the information of HS-DPCCH channel does not merge.
The graph of a relation of frame error rate (FER) and signal to noise ratio (SIR), obtaining original special uplink channel has one to merge gain than the dedicated channel that increases newly under different numbers connections shown in Figure 7 merge.That is:
P merges gain=(SIRdiff merging
*N0)/link power gain 0;
For situation shown in Figure 7, " SIRdiff merging " may be SIR0-SIR1, also might be SIR0-SIR2, SIR0 is the target signal to noise ratio of HS-DPCCH channel target frame error rate FER_HS-DPCCH correspondence under the nonjoinder situation, SIR1, SIR2...SIR4 is the signal to noise ratio of information target frame error rate FER_DPCCH correspondence under different linking numbers merge of original special uplink channel, so P merging gain is relevant with linking number.
Therefore, when UE is in soft changing state, the transmitting power that a certain moment HS-DPCCH channel transmitting power increases than original special physical controlling channel of upward DPCCH is " P coding gain " and " spreading gain " and " P merges gain ", promptly increases " P coding gain+spreading gain+P merges gain ".
Fig. 1 is the embodiment flow chart of the inventive method.According to Fig. 1, in step 1, at first by network side when HS-DPCCH sets up, determine bias power P10 and P20 and merging power gain P according to current channel condition
H0, this result can be obtained according to emulation by network side; In this step, network side also is provided with the threshold value of bias power P1 and P2 variation and merges power gain P according to the equilibrium of signaling traffic load and power setting effect
H0The threshold value that changes to change when bias power than greatly the time, redefines bias power.In step 2 P10 and P20 are handed down to UE as the emission bias power P1 and the P2 of HS-DPCCH channel respectively then, will merge power gain P simultaneously
H0Bias power P as the HS-DPCCH channel emission power
HBe handed down to UE.
Above-mentioned P1 be downlink channel measurement information coding gain and spreading gain and, P2 be acknowledge message coding gain and spreading gain with.That is:
P1=P downlink channel measurement information coding gain+P spreading gain;
P2=P acknowledge message coding gain+P spreading gain.
After the HS-DPCCH channel is set up, redefine current bias power P11 and P21 at step 2 network side according to current channel condition, if corresponding bias power P1 that current bias power P11 and P21 and UE are current and the difference of P2 surpass the threshold value of regulation, then P11 and P21 are handed down to UE as the bias power P1 and the P2 of HS-DPCCH channel emission power respectively, wherein
In step 3, network side judges whether UE is in soft changing state, if network side redefines current merging power gain P according to current channel condition
H1If, current merging power gain P
H1The merging power gain P current with UE
HDifference surpass the threshold value of regulation, will merge power gain P
H1Bias power P as the HS-DPCCH channel emission power
HAgain be handed down to UE.
In step 4, UE judges the current soft changing state that whether is in, if, change step 5, judge the information of current needs by UE by the HS-DPCCH channel feedback, if the metrical information of down high speed sharing channel (HS-DSCH) then is set at the HS-DPCCH channel emission power transmitting power and the bias power P1 of special physical controlling channel of upward DPCCH and merges power gain P
HAnd; If the affirmation information of HS-DSCH, the transmitting power and the reaching of bias power P2 that then the HS-DPCCH channel emission power are set at special physical controlling channel of upward DPCCH merge power gain P
HAnd, change step (7) then and continue operation.Otherwise change step 6, judge the information of current needs by UE by the HS-DPCCH channel feedback, if the metrical information of down high speed sharing channel (HS-DSCH), then the HS-DPCCH channel emission power be special physical controlling channel of upward DPCCH transmitting power and bias power P1's and; If the affirmation information of HS-DSCH, then the HS-DPCCH channel emission power be special physical controlling channel of upward DPCCH transmitting power and bias power P2's and.Carry out step (7) then, judge whether the HS-DPCCH channel is removed,, finish this power control operation, continue operation otherwise change step (2) if remove.
Claims (3)
1, a kind of Poewr control method of high-speed data access system high speed physical control channel comprises:
(1) network side when setting up, is determined bias power P10, P20 and merging power gain P according to current channel condition at up-high speed physical control channel (HS-DPCCH)
H0, P10 and P20 are handed down to UE as the bias power P1 and the P2 of HS-DPCCH channel emission power respectively, will merge power gain P simultaneously
H0Bias power P as the HS-DPCCH channel emission power
HBe handed down to UE, wherein,
P1 be downlink channel measurement information coding gain and spreading gain and, P2 be acknowledge message coding gain and spreading gain with;
After the HS-DPCCH channel is set up,
(2) network side redefines current bias power P11 and P21 according to current channel condition, if corresponding bias power P1 that current bias power P11 and HP21 and UE are current and the difference of P2 surpass the threshold value of regulation, P11 and P21 are handed down to UE as the bias power P1 and the P2 of HS-DPCCH channel emission power respectively;
(3) network side judges whether UE is in soft changing state, if network side redefines current merging power gain P according to current channel condition
H1If, current merging power gain P
H1The merging power gain P current with UE
HDifference surpass the threshold value of regulation, will merge power gain P
H1Bias power P as the HS-DPCCH channel emission power
HAgain be handed down to UE;
(4) UE judges the current soft changing state that whether is in, if change step (6), otherwise change step (5);
(5) UE judges the information of current needs by the HS-DPCCH channel feedback, if the metrical information of down high speed sharing channel (HS-DSCH), then the HS-DPCCH channel emission power be special physical controlling channel of upward (DPCCH) transmitting power and bias power P1's and; If the affirmation information of HS-DSCH, then the HS-DPCCH channel emission power be DPCCH transmitting power and bias power P2's and, change step (7) then;
(6) UE judges the information of current needs by the HS-DPCCH channel feedback, if the metrical information of down high speed sharing channel (HS-DSCH), then the HS-DPCCH channel emission power is the transmitting power and the bias power P1 of special physical controlling channel of upward (DPCCH) and merges power gain P
HAnd; If the affirmation information of HS-DSCH channel, then the HS-DPCCH channel emission power be DPCCH transmitting power and bias power P2's and merge power gain P
HAnd, change step (7) then;
(7) above-mentioned steps (2) repeats to step (6), removes up to the HS-DPCCH channel.
2, the Poewr control method of high-speed physical control channel according to claim 1 is characterized in that determining bias power P10 and P20 and merging power gain P according to current channel condition in the described step (1)
H0, obtain according to emulation by network side.
3, the Poewr control method of high-speed physical control channel according to claim 1 is characterized in that also comprising in the described step (1): network side is provided with the threshold value of bias power P1 and P2 variation and merges power gain P according to the equilibrium of signaling traffic load and power setting effect
H0The threshold value that changes.
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|---|---|---|---|
| CNB011434627A CN1173503C (en) | 2001-12-28 | 2001-12-28 | Power control method of high-speed physical control channel in high-speed data access system |
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| CN1173503C CN1173503C (en) | 2004-10-27 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005122450A1 (en) * | 2004-06-08 | 2005-12-22 | Huawei Technologies Co., Ltd. | A multi-user receiver of the uplink dedicated physical channel |
| CN100455126C (en) * | 2006-03-28 | 2009-01-21 | 华为技术有限公司 | Method for processing up link power unbalance |
| CN101998608A (en) * | 2009-08-11 | 2011-03-30 | 中兴通讯股份有限公司 | Uplink power control method and device |
| CN101572949B (en) * | 2008-04-28 | 2011-04-20 | 华为技术有限公司 | Method, communication system and user device for enhancing random access |
| CN101185359B (en) * | 2005-05-02 | 2012-01-11 | 诺基亚西门子网络公司 | Implementing downlink code management for fractional DPCH in timing conflict situations |
| CN101099356B (en) * | 2005-01-05 | 2012-07-25 | 诺基亚公司 | Mobile communication system, and transmitter, receiver therein and method therefor |
| WO2014166107A1 (en) * | 2013-04-12 | 2014-10-16 | 华为技术有限公司 | Control method and user equipment for power configuration in heterogeneous network |
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2001
- 2001-12-28 CN CNB011434627A patent/CN1173503C/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005122450A1 (en) * | 2004-06-08 | 2005-12-22 | Huawei Technologies Co., Ltd. | A multi-user receiver of the uplink dedicated physical channel |
| CN100342664C (en) * | 2004-06-08 | 2007-10-10 | 华为技术有限公司 | CDMA up special physical information channel multi-user receiving apparatus |
| CN101099356B (en) * | 2005-01-05 | 2012-07-25 | 诺基亚公司 | Mobile communication system, and transmitter, receiver therein and method therefor |
| CN101185359B (en) * | 2005-05-02 | 2012-01-11 | 诺基亚西门子网络公司 | Implementing downlink code management for fractional DPCH in timing conflict situations |
| CN100455126C (en) * | 2006-03-28 | 2009-01-21 | 华为技术有限公司 | Method for processing up link power unbalance |
| CN101572949B (en) * | 2008-04-28 | 2011-04-20 | 华为技术有限公司 | Method, communication system and user device for enhancing random access |
| CN101998608A (en) * | 2009-08-11 | 2011-03-30 | 中兴通讯股份有限公司 | Uplink power control method and device |
| CN101998608B (en) * | 2009-08-11 | 2014-09-10 | 中兴通讯股份有限公司 | Uplink power control method and device |
| WO2014166107A1 (en) * | 2013-04-12 | 2014-10-16 | 华为技术有限公司 | Control method and user equipment for power configuration in heterogeneous network |
| CN104255078A (en) * | 2013-04-12 | 2014-12-31 | 华为技术有限公司 | Control method and user equipment for power configuration in heterogeneous network |
| US9408128B2 (en) | 2013-04-12 | 2016-08-02 | Huawei Technologies Co., Ltd. | Control method for power configuration on heterogeneous network, and user equipment |
| CN104255078B (en) * | 2013-04-12 | 2018-04-20 | 华为技术有限公司 | The control method and user equipment of power configuration in heterogeneous network |
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| CN1173503C (en) | 2004-10-27 |
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