CN101022299A - HSUPA down physical channel transmitting power regulating method - Google Patents

Abstract

A method for regulating emission power of HSUPA down-link physical channel includes demodulating HS-DPCCH channel to obtain channel quality indication of user, calculating channel quality and its average value according to CQJ and UE ability grade, calculating power regulation parameter USER according to ACK number sent to user and retransmission frequency of user as well as its average value, carrying out regulation on emission power of HSUPA down-link physical channel according obtained USER.

Description

The HSUPA down physical channel transmitting power regulating method

Technical field

The present invention relates to wireless communication field, particularly a kind of HSUPA down physical channel transmitting power regulating method.

Background technology

HSDPA (High speed Downlink Packet Access, the high-speed downstream bag inserts) be important new features in third generation wireless telecommunications (3G) the WCDMA standard, its basic ideas are to set up the shared transmission channel of a high speed to improve message transmission rate, with respect to original R99, by utilizing from UE (User Equipment, subscriber equipment) holds the channel quality indicator (CQI) (Channel QulityIndicator) that feeds back, ACK/NACK (Acknowledgement/Negative Acknowledgement confirmation/deny information) message, QoS of survice (Quality of Service, service quality) parameter etc. is given UE allocation schedule resource, thereby provides maximized descending throughput for system.In order to reduce the phase mutual interference of minizone, improve systematic function, in the WCDMA system, to carry out certain restriction to the transmitting power of each sub-district usually, this will limit each user's down transmitting power accordingly.As mentioned above, when there is HSUPA (High Speed Uplink Packet Access in the sub-district, the high speed uplink bag inserts) during the user, down channel will comprise E-AGCH (E-DCH Absolute Grant Channel, the E-DCH absolute grant channel), ERGCH (E-DCH Relative Grant Channel, E-DCH relative authorization channel) and E-HICH (E-DCH HARQ Acknowledgement Indicator Channel, E-DCH HARQ answering indication signal channel) three kinds of physical channels, if the down transmitting power of these three kinds of channels is lower, then can influence the receiving ability of UE end; If but transmitting power is too high, then will inevitably neighbor cell user's receptivity be exerted an influence, reduce the performance of whole system.For this reason, be necessary the transmitting power of the HSUPA down physical channel that comprises E-AGCH, ERGCH and E-HICH is controlled.

The transmitting power that two kinds of method control HSUPA down physical channels are arranged usually:

Method 1: in each sub-district, the transmitting power of HSUPA down physical channel is provided with fixed value, the advantage of this method is simple, but its flexibility deficiency can not change along with the variation of user and sub-district environment of living in.

Method 2: as defined among the agreement 3GPP TS 25.433, give E-AGCH, ERGCH and E-HICH channel configuration with respect to the power bias of descending DPCCH TPC territory transmitting power respectively by system, make the transmitting power of these three kinds of down channels of HSUPA controlled by the transmitting power in descending DPCCH TPC territory.But because the variation of the channel quality of the variation of TPC territory transmitting power reflection is inaccurate, thereby this method power control effect is relatively poor.

Summary of the invention

At the defective of the above prior art, the purpose of the embodiment of the invention is to provide a kind of more effective HSUPA down physical channel power regulating method.For realizing that the method that this goal of the invention embodiment of the invention provides comprises: the transmitting power of adjusting the HSUPA down physical channel according to the channel quality that reports and/or user's confirmation number and user's number of retransmissions.

The method that the embodiment of the invention provides can for:

Demodulation HS-DPCCH channel (High Speed-Dedicated Physical Control Channel, High-Speed Dedicated Physical Control Channel) obtains user's channel quality indicator (CQI);

Calculate the channel quality CQI of described UE according to the ability rating Cat of described CQI and UE _Cur ⁱAnd according to described CQI _Cur ⁱCalculate its mean value CQI _Avg ⁱ

Still be the number Num of retransmission frame according to next uplink frame of receiving after affirmation information number that sends to the user and the transmission confirmation _Retrans ⁱWith described mean value CQI _Avg ⁱRated output is adjusted parameter USER ⁱ

Adjust parameter USER according to described power ⁱDescribed HSUPA down physical channel transmitting power is adjusted.

By with the comparison of prior art, the embodiment of the invention has been considered channel quality, user's confirmation number and number of retransmissions, improved the adjustment effect of transmitting power of the down physical channel of user HSUPA, reduced the interference of system, optimized the entire system performance adjacent sub-district.

Description of drawings

Fig. 1 is the flow chart of one embodiment of the invention

Embodiment

The embodiment of the invention has been utilized HS-DPCCH channel (High Speed-Dedicated PhysicalControl Channel, High-Speed Dedicated Physical Control Channel) Cheng Zai CQI information and/or user ACK number and user's number of retransmissions, weigh user's down channel quality, and then the transmitting power of the down physical channel of adjustment user HSUPA, thereby the reduction system is to facing the interference of sub-district, the optimization system performance.

Also the invention will be further described in conjunction with the accompanying drawings below by specific embodiment:

Embodiment one:

The method that the present invention adjusts the transmitting power of HSUPA down physical channel specifically comprises:

NodeB obtains the channel quality CQI of user terminal UE _Cur ⁱ, and the channel quality CQI by UE _Cur ⁱCalculate the mean value CQI of user UE channel quality CQI _Avg ⁱ, pass through formula ${\mathrm{USER}}^i=w_1\·\frac{1}{{\mathrm{CQI}}_{\mathrm{avg}}^i}$ Calculate intermediate parameters USER ⁱAdjust parameter, wherein w as power ₁Be scale factor, its span is 0＜w ₁＜1, for example, can get w ₁=0.1 adjusts parameter according to this power adjusts the transmitting power of HSUPA down physical channel.

Embodiment two:

The method that the present invention adjusts the transmitting power of HSUPA down physical channel specifically comprises:

Node B obtains the number Num of the user's confirmation ACK that sends to user i _Ack ⁱStill be user's number of retransmissions Num of retransmission frame with next uplink frame of receiving behind the transmission Ack _Retrans ⁱ, pass through formula ${\mathrm{USER}}^i=w_2\·\frac{{\mathrm{Num}}_{\mathrm{retrans}}^i}{{\mathrm{Num}}_{\mathrm{ack}}^i}$ Calculate intermediate parameters USER ⁱAdjust parameter, wherein w as power ₂Be scale factor, its span is 0＜W ₂＜1, for example can get W ₂=0.1, adjust parameter according to this power the transmitting power of HSUPA down physical channel is adjusted.

Embodiment three:

Referring to Fig. 1, the method that the present invention adjusts the transmitting power of HSUPA down physical channel specifically may further comprise the steps:

Step 101, Node B obtain the CQI of user i by demodulation HS-DPCCH channel;

Step 102, weigh the channel quality CQI that the UE end obtains according to the ability rating Cat of CQI and UE _Cur ⁱ, can pass through formula specifically ${\mathrm{CQI}}_{\mathrm{cur}}^i=f(\mathrm{CQI},\mathrm{Cat})$ Calculate CQI _Cur ⁱ, wherein f () is the function of CQI and Cat, its implementation is decided as the case may be, can be the form that obtains according to the actual measurement statistics, also can be a certain linearity or nonlinear function.At the channel quality CQI that obtains the UE end _Cur ⁱAlso need to obtain the mean value CQI of the channel quality of UE end afterwards _Avg ⁱ, mean value calculation can be utilized various smoothing filter computational methods, is not limited to here but only provides a kind of example, promptly utilizes the level and smooth current measured value of 1 rank αLv Boqi, and the result is: ${\mathrm{CQI}}_{\mathrm{avg}}^i=\mathrm{\α}{\mathrm{CQI}}_{\mathrm{cir}}^i+(1-\mathrm{\α}){\mathrm{CQI}}_{\mathrm{avg}}^i,$ Wherein the α size can be determined according to actual conditions, for example sets α=0.1;

Step 103, Node B obtain the ACK number Num that sends to user i _Ack ⁱAnd next uplink frame of receiving behind the transmission Ack still is the number Num of retransmission frame _Retrans ⁱCalculate intermediate parameters USER afterwards ⁱAdjust parameter as power, concrete computational methods are: ${\mathrm{USER}}^i=w_1\·\frac{1}{{\mathrm{CQI}}_{\mathrm{avg}}^i}+w_2\·\frac{{\mathrm{Num}}_{\mathrm{retrans}}^i}{{\mathrm{Num}}_{\mathrm{ack}}^i},$ W wherein ₁, W ₂Be scale factor, satisfy W ₁+ W ₂=1, its value is determined by emulation or actual measurement according to concrete application scenarios, for example can be set W ₁=0.9, W ₂=0.1;

Step 104, adjust parameter the actual transmission power of user's down physical channel is adjusted according to obtaining power in the above step, for HSUPA user, down physical channel mainly comprises: E-AGCH, ERGCH and E-HICH channel, for instance, establish E-RGCH, the E-HICH of user i, the transmitting power of E-AGCH channel maximum is respectively P _{RGCH_MAX} ⁱ, P _{HICH_MAX} ⁱ, P _{AGCH_MAX} ⁱ, then this user's actual transmission power can for:

$P_{E-\mathrm{RGCH}}^i=g\left({\mathrm{USER}}^i\right)P_{\mathrm{RGCH}\_\mathrm{MAX}}^i$

$P_{E-\mathrm{HICH}}^i=h\left({\mathrm{USER}}^i\right)P_{\mathrm{HICH}\_\mathrm{MAX}}^i$

$P_{E-\mathrm{AGCH}}^i=k\left({\mathrm{USER}}^i\right)P_{\mathrm{AGCH}\_\mathrm{MAX}}^i$

G () wherein, h (), k () is monotone nondecreasing function, and its implementation is decided as the case may be, can be the form that obtains according to the actual measurement statistics, or a certain linearity or nonlinear function, but all should satisfy 0＜g (), h (), k ()＜1.

Above embodiment is only in order to illustrating technical scheme of the present invention, but not the present invention is made restrictive sense.Although the present invention is had been described in detail with reference to above-mentioned preferred embodiment, those of ordinary skill in the art is to be understood that: it still can make amendment or be equal to replacement technical scheme of the present invention, and this modification or be equal to the spirit and scope that replacement does not break away from technical solution of the present invention.

Claims (8)

1, a kind of HSUPA down physical channel transmitting power regulating method is characterized in that, adjusts the transmitting power of HSUPA down physical channel according to the channel quality that reports and/or user's confirmation number and user's number of retransmissions.

2, the method for claim 1 is characterized in that, specifically may further comprise the steps:

Demodulation HS-DPCCH channel obtains user's channel quality indicator (CQI);

Calculate the channel quality CQI of described UE according to the ability rating Cat of described CQI and UE _Cur ⁱAnd according to described CQI _Cur ⁱCalculate its mean value CQI _Avg ⁱ

Still be the number Num of retransmission frame according to next uplink frame of receiving after affirmation information number that sends to the user and the transmission confirmation _Retrans ⁱWith described mean value CQI _Avg ⁱRated output is adjusted parameter USER ⁱ

Adjust parameter USER according to described power ⁱDescribed HSUPA down physical channel transmitting power is adjusted.

3, method as claimed in claim 2 is characterized in that, the ability rating Cat of described CQI and UE calculates the channel quality CAI of described UE _Cur ⁱSpecifically comprise: the function calculation by described CQI and ability rating Cat is described ${\mathrm{CQI}}_{\mathrm{cur}}^i=f(\mathrm{CQI},\mathrm{Cat}).$

4, method as claimed in claim 2 is characterized in that, according to described CQI _Cur ⁱCalculate its mean value CQI _Avg ⁱSpecifically comprise: utilize the method for smoothing filter to calculate described mean value CQI _Avg ⁱ

5, method as claimed in claim 4 is characterized in that, described smoothing filter is 1 rank αLv Boqi, and is described ${\mathrm{CQI}}_{\mathrm{avg}}^i=\mathrm{\α}{\mathrm{CQI}}_{\mathrm{cur}}^i+(1-\mathrm{\α}){\mathrm{CQI}}_{\mathrm{avg}}^i.$

6, method as claimed in claim 2 is characterized in that, described basis sends to user's affirmation information number and sends next uplink frame of receiving after the confirmation and still is the number Num of retransmission frame _Retrans ⁱWith described mean value CQI _Avg ⁱRated output is adjusted parameter USER ⁱBe specially:

${\mathrm{USER}}^i=w_1\·\frac{1}{{\mathrm{CQI}}_{\mathrm{avg}}^i}+w_2\·\frac{{\mathrm{Num}}_{\mathrm{retrans}}^i}{{\mathrm{Num}}_{\mathrm{ack}}^i},$

W wherein ₁, w ₂Be scale factor, satisfy w ₁+ w ₂=1, its value is determined by emulation or actual measurement according to concrete application scenarios.

7, method as claimed in claim 2 is characterized in that, and is described according to described power adjustment parameter USER ⁱDescribed HSUPA down physical channel transmitting power adjusted specifically comprise: the HSUPA down physical channel transmitting power is adjusted into described power adjusts parameter USER ⁱFunction and the product of HSUPA down physical channel maximum transmission power.

8, as any described method of claim 1 to 7, it is characterized in that described HSUPA down physical channel specifically comprises: E-AGCH and/or ERGCH and/or E-HICH channel.