CN100555908C - Uplink transmit power control method during terminal in soft handover - Google Patents

Uplink transmit power control method during terminal in soft handover Download PDF

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Publication number
CN100555908C
CN100555908C CNB200380100217XA CN200380100217A CN100555908C CN 100555908 C CN100555908 C CN 100555908C CN B200380100217X A CNB200380100217X A CN B200380100217XA CN 200380100217 A CN200380100217 A CN 200380100217A CN 100555908 C CN100555908 C CN 100555908C
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power
dpcch
emission
power control
time slot
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CN1692577A (en
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安俊基
卢东昱
沈东熙
金玟廷
黄承勳
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LG Electronics Inc
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LG Electronics Inc
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/06—TPC algorithms
    • H04W52/14—Separate analysis of uplink or downlink
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/38—TPC being performed in particular situations
    • H04W52/40—TPC being performed in particular situations during macro-diversity or soft handoff
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

A kind of power control method of mobile communication system, after finishing the emission of HS-DPCCH signal, promptly the DPCCH power reduction to the required level of current DPCCH signal, thereby the up link DPCCH power of control terminal effectively obviously reduces the uplink channel interference in the whole mobile communication system.

Description

Uplink transmit power control method during terminal in soft handover
Technical field
The present invention relates to mobile communication system, relate in particular to a kind of power control method in the mobile communication system.
Background technology
Usually in mobile communication system, it is most important that the power control of uplink direction is accepted capacity to the increase system.Particularly, terminal is accepted the power control commands from numerous base stations when soft handover, according to ordering the power of determining on the uplink channel to adapt to the receptible level in each base station.Even terminal is launched a plurality of channel signals simultaneously when soft handover, the situation that some channel is only received by a base station also can appear.At this moment, terminal should be adjusted its power control to uplink channel, makes base station received signal effectively.
In each sub-district of mobile communication system, the base station provides a down link common signal channel to a plurality of terminals, and this down channel only belongs to a specific terminal in special time period.In order to control this downlink common channel, each terminal on uplink channel to the base station control information.To the emission of this control information, often use an additional uplink control channel signal.
Yet, because of general uplink channel signals all as being received by all contiguous base stations, must be enough to allow arbitrary base station correctly receive so the requirement of the transmitting power of uplink signal is high.Adjusting up-link transmission power to make it to adapt to one not during the base station of transmitting down link common signal channel, the base station of transmitting down link common signal channel just can not correctly receive the uplink control channel that this downlink common channel is added.
Therefore, when emission was used to control the signal of downlink common channel on control channel, terminal just increased the transmitting power of additional control channel with respect to other uplink channel.For example, illustrated below-IMT-200HSDPA (high-speed downlink packet access) system.
The HS-DPCCH of IMT-2000HSDPA system (High-Speed Dedicated Physical Control Channel) is corresponding to this additional uplink control channel, and proposed a kind of for effectively receiving the additional power control method of HS-DPCCH signal.Though this method has been improved the HS-DPCCH receptivity of base station, the interference of up link is greater than the interference of using related art power control method.
HS-DPCCH between the up link of various IMT-2000HSDPA system is only received as the base station of adopting HSDPA method and a plurality of base station to make the terminal of soft handover by a certain.Hereinafter, this base station is called the HSDPA base station.The terminal of soft handover uses the power that is proportional to up link DPCCH signal transmission power to launch the HS-DPCCH signal, and the base station use comes demodulation HS-DPCCH signal by DPCCH institute pilot transmitted signal.
In the DPCCH power control, in the time of can both correctly receiving the DPCCH signal in the arbitrary base station that participates in soft handover, terminal just is set to the power (minimum power) of this moment the transmitting power of DPCCH.Therefore, institute's pilot transmitted power may be not enough to the HS-DPCCH signal that demodulation is only received by single HSDPA base station on this DPCCH.Thereby in the HS-DPCCH power control, terminal is derived the transmitting power of the required DPCCH signal of demodulation HS-DPCCH signal in the moment that begins to launch the HS-DPCCH signal, and the power level of DPCCH is increased to the amount of being derived for emission HS-DPCCH signal.
The following describes the DPCCH power control of terminal when soft handover.
At first, terminal in the IMT-2000 system adopts the general business channel, and emission is as the DPCCH signal of general control channel continuously together with uplink direction, and emission is used for pilot tone and other essential control information of Traffic Channel demodulation on this DPCCH.
Terminal receives the power control commands that is used for DPCCH from all base stations that participate in soft handover when soft handover.At this moment, according to base station environment separately, the power of the DPCCH signal that each base station receives is different mutually.And all base stations are launched independently power control commands respectively by the corresponding DPCCH signal power of receiving separately.
Fig. 1 is the schematic diagram of a terminal and contiguous base station in the soft handover.
With reference to Fig. 1, TPCi represents to pass to from i base station the power control commands of terminal.Suppose that TPCi=1 is a power-up commands, TPCi=-1 is the decreasing power order.Fig. 1 illustrates base station 11A emission decreasing power order and the situation of other base station 11N-1 and 11N emission power-up commands.If being received from arbitrary DPCCH power control commands of base station 11A～11N is the decreasing power order, terminal 12 just concludes that at least one base station can receive this DPCCH signal.So, just the power level of DPCCH being lowered Δ TPC, this is a predetermined power control constant.If received DPCCH power control commands is power-up commands entirely, then the power level of DPCCH just increases Δ TPC.
That is, if TPC1, TPC2 ... TPC N- 1With TPC NAll be " 1 ", then TPC-comb=1 separately; If TPC1, TPC2 ... TPC N-1With TPC NIn have one at least for " 1 ", then TPC-comb=-1.And, Δ DPCCHCalculating by formula 1 expression.
Δ DPCCH=TPC_comb * Δ TPC (formula 1)
In the formula: TPC-Comb is a power control numerical value, is determined Δ with reference to the power control commands of base station 11A ~ 11N by terminal 12 DPCCHIt is the power increment that each time slot provides.
The terminal that receives this class power control commands can be with one of two kinds of power control methods that preset, and promptly " power control method 1 " or " power control method 2 " calculates the power control value TPC-Comb for preparing to offer DPCCH.
Fig. 5 A illustrates power control method 1, and the power control commands of all base stations that terminal receives by suitable use is determined the DPCCH transmitting power of each transmission time slot.
Fig. 5 B illustrates power control method 2, and terminal is determined the DPCCH transmitting power by N time slot group (N＞1) for unit.Fig. 5 B illustrates the example of N=3, and wherein, the border of each N time slot group can preestablish.Concerning arbitrary N time slot group, the DPCCH transmitting power of the one N-1 time slot is constant, concerning last N time slot, then the DPCCH transmitting power can utilize whole power control commands of all received during N time slot group base stations to determine, therefore, can in each N time slot, can only once change the transmitting power of DPCCH.
HS-DPCCH power control when the following describes terminal in soft handover.
Fig. 2 is the schematic diagram of emission DPCCH and HS-DPCCH signal.
With reference to Fig. 2, make the terminal of HSDPA service during soft handover, continue the DPCCH signal of emission with uplink direction as general control channel signals, also intermittent transmission is as the HS-DPCCH signal of HSDPA additional control channel signal.In this case, relevant base station is used in DPCCH and goes up the pilot transmitted signal and come demodulation HS-DPCCH signal.Received HS-DPCCH power is proportional to DPCCH power, and depends on the variation of DPCCH power.
Terminal is when soft handover, and all base stations that participate in soft handover can both receive the DPCCH signal, yet the HS-DPCCH signal only can be received by the HSDPA base station.All can correctly accept it if the DPCCH transmitting power is arranged to participate in arbitrary base station of soft handover, then the power that receives of the DPCCH signal launched of this terminal may be not enough to come this HS-DPCCH signal of demodulation in the HSDPA base station with the code element of leading in the DPCCH signal.
The HS-DPCCH power control method of correlation technique.
For addressing this problem, make the terminal of HSDPA service during soft handover, only (that is time slot) brings up to the needed level in HSDPA base station to the transmitting power of DPCCH in during the emission HS-DPCCH.
Fig. 3 is the schematic diagram of the HS-DPCCH power control method of correlation technique.
TPC Se(i) be the power control commands of the HSDPA base station of front i time slot in the HS-DPCCH signal transmission time slot, TPC-Comb (i) is the power control numerical value of the HSDPA base station of front i time slot in the HS-DPCCH signal transmission time slot.This power control numerical value is that terminal 12 is determined according to the power control commands of base station 11A～11N.
Before the emission HS-DPCCH signal, terminal has been stored TPC-comb (1), TPC-comb (2) ... TPC-comb (K-used-1) and TPC-comb (K-used), also store TPCsc (1), the TPCsc (2) of K-used time slot ... TPCsc (K-used-1) and TPCsc (K-used), and obtain " d " with these numerical value." d " is used to launch the required secondary power numerical value of DPCCH signal in the time slot of emission HS-DPCCH signal, the derivation of " d " differs because of system constitutes.The required power increment of HS-DPCCH signal emission calculates with formula 2:
Δ DPCCH=d * Δ TPC+TPC Sc(HS_start) * Δ TPC (formula 2)
In the formula 2, TPCsc (HS-start) is the power control commands of emission HS-DOCCH time slot, by the HSDPA base station to terminal.
The numerical value of K_used can use constant K HS_ TPC obtains, for example, and can be with K HSThe numerical value of _ TPC is set to default value.But, behind emission HS_DPCCH signal, if at process K HSLaunched another HS-DPCCH signal before the as many slot time of _ TPC, just the time slot numerical value between two HS-DPCCH signals is set to new K_used value.Do not launch DPCCH power control in these time slots of HS-DPCCH signal follow " the DPCCH power control method ".
Correlation technique DPCCH launches power control method
The DPCCH emission power control method of correlation technique comprises modified model power control method A and B.
Fig. 6 A illustrates the modified model power control method A of the terminal (power control method 2 of application of aforementioned) that is used to launch light HS-DPCCH.Suppose that the HS-DPCCH time slot is the n time slot,, derive the required DPCCH transmitting power of time slot at emission HS-DPCCH by using from (m-K-est) time slot to the power control commands of n time slot and use power control history (as last power control).Utilize this derivation, make and to determine the DPCCH transmitting power.So compare with the transmitting power of last time slot, but the DPCCH transmitting power increasing or decreasing of transmission time slot is to a certain numerical value greater than Δ TPC.Fig. 6 A illustrates the example of a K_est=5.For all other time slots beyond the time slot of emission HS-DPCCH, DPCCH emission power control can be used power control method 2.
Fig. 6 B illustrates the modified model power control method B of the terminal (power control method 2 of application of aforementioned) that is used to launch HS-DPCCH.The time slot of supposing HS-DPCCH is the n time slot, and since (n-K=mod) time slot, terminal changes DPCCH emission power control method into power control method 1, and only according to the power of determining each time slot from the power control commands of carrying out the HSDPA serving base station.Among Fig. 6 B, suppose K-mod=5.After the HS-DPCCH emission was finished, terminal was according to the power of determining each time slot from the power control commands of all base stations.And on a N time slot group border or the one M * N time slot group border of occurring, HS-DPCCH emission back, terminal changes back to power control method 2 to the emission power control method.The M here is at random a constant.
The problem of correlation technique
Yet, in the correlation technique HS-DPCCH of Fig. 3 power control method, because of the power of heightening only keeps one section preset time (promptly not resetting) regardless of finishing that the HS-PCCH signal is launched separately, so the power of general control channel (DPCCH) is also unnecessarily kept high.
In other words, the DPCCH power in the time slot of emission HS-DPCCH has unnecessarily increased.When using the DPCCH power control method again when terminal is finished HS-DPCCH emission back at soft handover, this power-down process is finished with many time slots possibly, up to power naturally (with little by little) get back to the level of suitable DPCCH.Therefore, the DPCCH signal makes the undesirable increase of interference strength in the whole mobile communication system with some time slot intervals of unnecessary high power transmission (promptly being right after those time slots in the time slot back of emission HS-DPCCH).
Refer again to Fig. 6 A and 6B, in correlation technique DPCCH emission power control, terminal (pressing power control method 2 operations) is launched using modified power control method A of power control and B at the time slot of emission HS_DPCCH to DPCCH.Those time slots after emission is finished for HS_DPCCH, because the DPCCH transmitting power changes every N time slot, so regulate the DPCCH transmitting power of emission HS-DPCCH and wait for that again the DPCCH transmitting power is got back to the required time of its normal (suitable) level helplessly long, in whole mobile communication system, cause undesirable interference.
Summary of the invention
Therefore, the present invention proposes the power control method in a kind of mobile communication system, this method can obviously be alleviated one or more problems that limitation and shortcoming produced of correlation technique.
An object of the present invention is to provide a kind of power control method of mobile communication system, the feasible power that emission is raised to up link Dedicated Control Channel signal can promptly be resetted and be used to launch general control channel signals.
All attendant advantages of the present invention, purpose and feature, part proposes in the following description, and those skilled in the art is by consulting this description or can understanding in the embodiment of this invention.By written explanation and the structure of specifically noting as claim and accompanying drawing, can realize and reach all purposes of the present invention and other advantage.
For realizing that these purposes are with other advantage and according to purpose of the present invention, as this paper implement and generalized description, in soft handover, launching continuously in the communication terminal, power control method of the present invention comprises step: the power of general control channel is brought up to the demodulation Dedicated Control Channel launch desired power level, behind emission Dedicated Control Channel signal, if finished emission, just the power adjustments after increasing is become to satisfy current general control channel and launch desired power level.
Preferably, this regulating step comprises step: remove the power level increment the power after increasing, the readjustment of the power after the increase of therefrom having removed the power level increment to current general control channel is launched desired power level.
More preferably, using formula { [power after the increase]+[d * Δ TPC] } removes this power level increment.
More preferably, using formula (power after the increase)-Max{0, [d-f (K_intv)] } remove increment.
More preferably, (power of general control channel-d)+[TPC-comb (HS-end)+Y] * Δ TPC carries out the readjustment step to using formula.
More preferably, terminal is carried out HSDPA (high-speed downlink packet access) service.
Preferably, this Dedicated Control Channel is HS_DPCCH (High-Speed Dedicated Physical Control Channel) in the HSDPA system, and general control channel is DPCCH (Dedicated Physical Control Channel).
More preferably, terminal is carried out HSDPA (high-speed downlink packet access) service.
Should be appreciated that above-mentioned general remark and following of the present invention being described in detail is example explanation is intended to further specify the content of the present invention that claim proposes.
Brief description
Accompanying drawing is comprising the part further understanding the present invention and constitute the application, shows explanation embodiment of the present invention, and accompanying drawing is explained principle of the present invention with describing.In the accompanying drawing:
Schematic diagram when Fig. 1 is terminal and adjacent base station soft handover;
Fig. 2 is the schematic diagram of emission DPCCH and HS-DPCCH power control method;
Fig. 3 is the schematic diagram of the HS-DPCCH power control method of correlation technique;
Fig. 4 is the power control method schematic diagram of a preferred embodiment of the present invention;
Fig. 5 A illustrates the power control method 1 of correlation technique;
Fig. 5 B illustrates the power control method 2 of correlation technique;
Fig. 6 A and 6B illustrate the DPCCH emission power control of correlation technique, and wherein terminal (by power control method 2 operations) has been used modified model power control method A and B at the time slot of emission HS-DPCCH to DPCCH emission power control; With
Fig. 7 A and 7B illustrate aforesaid modified model power control method A and B are used the present invention and the example when the K-algo=5.
Implement better model of the present invention
Go through all preferred embodiments of the present invention now, the example is shown in all accompanying drawings.
HS_DPCCH power control method of the present invention
In the terminal that continues general control channel signals of emission and intermittent transmission Dedicated Control Channel signal, a kind of method of controlling the control channel power of radio telecommunication terminal of the present invention comprises step: behind the emission Dedicated Control Channel signal, promptly the power of general control channel is brought up to the required power level of demodulation Dedicated Control Channel emission, if finished this Dedicated Control Channel emission, then the power adjustments that increases is launched required power level to meeting current general control channel.
Fig. 4 is the schematic diagram of the power control method of one embodiment of the invention.
With reference to Fig. 4, in the general HS-DPCCH power control method that the present invention uses, in the HSDPA system, make the terminal of soft handover, (one or more time slot) suitably regulates DPCCH power between HS-DPCCH signal emitter region.But when finishing the emission of HS-DPCCH signal, the present invention promptly arrives the required level of the current DPCCH signal of emission to the DPCCH power reduction.
Among the present invention, terminal increases Δ to the transmitting power of DPCCH in the time slot of emission HS-DPCCH DPCCHΔ DPCCHCan calculate by the formula 2 of correlation technique.
But the difference of the present invention and correlation technique is, after finishing the HS-DPCCH emission, in first time slot DPCCH power is reduced Δ DPCCH
Here, Δ DPCCHCalculate with formula 3.
Δ DPCCH=-d * Δ TPC+TPC_comb (HS_end) * Δ TPC+Y * Δ TPC (formula 3)
In the formula 3, d is the numerical value of the required DPCCH power increment of derivation HS-DPCCH transmission time slot, and TPC_comb (HS_end) is the TPC_comb value of this time slot after the HS_DPCCH emission is finished.
The method that the present invention proposes when finishing the emission of HS-DPCCH signal, reduces the DPCCH power (d * Δ TPC) that is increased immediately when beginning HS-DPCCH emission.
In addition, the Y value is used to compensate the power control error that may occur when the rapid DPCCH of the reduction power of HS-DPCCH emission back, can be provided with as follows in every way according to system:
a)Y＝0
b)Y＝1
c)Y＝TPC_comb(HS_start)
d)Y＝TPC_comb(HS_start)+1
At c) and d) in, TPC_comb (HS_start) is the TPC_comb value in the time slot of beginning HS-DPCCH emission.
After emission HS-DPCCH signal was finished, as shown in Figure 4, emission DPCCH signal was followed the general power control method in the soft handover.
Simultaneously, explained later the present invention has considered HS-DPCCH signal transmission time slot a kind of power control method at interval.
When power control method of the present invention is used in power control to DPCCH, if launch another HS-DPCCH in the K_used time slot after having launched a HS-DPCCH, then the interval between these two HS-DPCCH transmission time slots may be not enough to derive the required secondary power of emission the 2nd HS=DPCCH.Consider this insufficiency, one of available following correction formula place of equation 3.
At first, when doing HS-DPCCH emission next time, calculate Δ in K_used time slot front DPCCHFormula as follows: Δ DPCCH=-d * Δ TPC+TPC-comb (HS-end) * Δ TPC+Y * Δ TPC
In other occasion, calculate Δ DPCCHFormula as follows;
Δ DPCCH＝TPC-comb(HS-end)×ΔTPC
Secondly, Δ DPCCH=Max{0, [d-f (K-intv)] } * Δ TPC+TPC-comb (HS-end) * Δ TPC+Y * Δ TPC
Therefore, ' K_intv ' refers to the slot time from current HS-DPCCH transmission time slot to next next transmission time slot of DPCCH.If another HS_DPCCH launches in next time slot of this HS-DPCCH transmission time slot, ' K_intv ' just is 0.In addition, ' f (K_intv) ' is ' K_intv ' arbitrary function as a factor, and ' Max{a, b} ' are the functions of selecting the greater among a and the b.
DPCCH emission power control of the present invention
For for the terminal of making soft handover in the IMT-2000HSDPA system, the present invention has also improved correlation technique is regulated the DPCCH transmitting power in HS-DPCCH method.Specifically, for the terminal of pressing power control method 2 operation, after finishing the HS-DPCCH emission, amount to K_algol timeslot number at least during, power control method 1 has been used in DPCCH emission power control, K_algol time slot DPCCH transmitting power afterwards is still based on power control method 2.
That is, according to the present invention, suppose HS-DPCCH in n time slot emission, from the border of (n+1) time slot up to a N time slot group or the MXN time slot group that occurs (n+1+K_algol) time slot after, terminal is launched DPCCH and is all used power control method 1.Afterwards, use power control method 2 again.Here, M is an arbitrary constant.
Fig. 7 A and 7B illustrate, and aforementioned improved type power control method A and B have been used the present invention and the some examples when the K_algo=5.Compare with the related art method shown in the 6B with Fig. 6 A, be appreciated that obviously the DPCCH transmitting power was got back to the required time of its suitable level, than related art method much shorter when employing was of the present invention.
Industrial usability
Therefore, power control method of the present invention promptly drops to the required level of the current DPCCH signal of emission to the DPCCH transmitting power when finishing the emission of HS-DPCCH signal, thereby has controlled the DPCCH power of terminal up link effectively.Obviously reduced in the system with the problematic uplink channel interference of correlation technique.
Though describe with reference to all preferred embodiments here and illustrate the present invention, thereby it will be apparent to those skilled in the art that and to make various corrections and variation without prejudice to spirit of the present invention and scope.Therefore, line chart of the present invention has all comprised various corrections of the present invention and variation in claims and equivalent file extent thereof.

Claims (23)

1. a kind of power control method in the mobile communication terminal that continues general control channel signals of emission and intermittent transmission Dedicated Control Channel signal when soft handover is characterized in that, comprises step:
In case emission Dedicated Control Channel signal is promptly brought up to the required power level of demodulation Dedicated Control Channel to the power of general control channel; With
If finished the Dedicated Control Channel emission, then the power adjustments after increasing is become to meet the required power level of current general control channel emission.
2. power control method as claimed in claim 1 is characterized in that regulating step comprises:
Remove the power level increment the power after increasing; With
The required power level of current general control channel emission of resetting of the power after the increase of therefrom having removed the power level increment.
3. power control method as claimed in claim 2, it is characterized in that, { [power after the increase]+[d * Δ TPC] } removes the power level increment with formula, wherein, ' d ' is used to derive the numerical value of general control channel power increment, and ' Δ TPC ' is the power level that increases or reduce according to the unit power level.
4. power control method as claimed in claim 2, it is characterized in that, with formula (power after the increase)-Max{0, [d-f (K_intv)] } remove the power level increment, wherein, ' d ' is used to derive the numerical value of general control channel power increment, ' K_intv ' is the timeslot number from the time point that finishes the emission of current Dedicated Control Channel to the time point that starts Dedicated Control Channel emission next time, ' f (K_intv) ' is the arbitrary function of K_intv as a factor, and Max{0, [d-f (K_intv)] } be the function of the greater among selection 0 or [d-f (K_intv)].
5. power control method as claimed in claim 2, it is characterized in that, (power of general control channel-d)+[TPC_comb (HS_end)+Y] * Δ TPC carries out the readjustment step with formula, wherein, ' d ' is used to derive the numerical value of general control channel power increment, ' TPC_comb (HS_end) ' is an open value, when soft handover, a time slot of finishing after the HS-DPCCH signal is launched is obtained from the power control commands of all base stations with collecting, ' Δ TPC ' is the power level that increases or reduce according to the unit power level, and Y is the numerical value that is used to compensate the power control error that produces because of the power anticlimax.
6. power control method as claimed in claim 2 is characterized in that the power after the readjustment comprises the numerical value that is used to compensate the power control error, and this power control error causes owing to power reduces suddenly.
7. power control method as claimed in claim 6 is characterized in that, the numerical value that is used to compensate the power control error is 0.
8. power control method as claimed in claim 6 is characterized in that, the numerical value that is used to compensate the power control error is 1.
9. power control method as claimed in claim 6, it is characterized in that, the numerical value that is used to compensate the power control error is TPC_comb (HS_start), and wherein TPC_comb (HS_start) is the power control numerical value of when soft handover a time slot of finishing after the emission of HS-DPCCH signal being obtained from the power control commands of all base stations with collection.
10. power control method as claimed in claim 6, it is characterized in that, the numerical value that is used to compensate the power control error is [TPC_comb (HS_start)+1], and wherein TPC_comb (HS_start) is the power control numerical value of when soft handover a time slot of finishing after the emission of HS-DPCCH signal being obtained from the power control commands of all base stations with collection.
11. power control method as claimed in claim 1 is characterized in that, Dedicated Control Channel is the High-Speed Dedicated Physical Control Channel HS-DPCCH in the HSDPA system, and general control channel is a special used for physical control channel DPCCH.
12. power control method as claimed in claim 1 is characterized in that, terminal is carried out high-speed downlink packet and is inserted the HSDPA service.
13. power control method as claimed in claim 1 is characterized in that, after finishing the Dedicated Control Channel emission, adjusted power is used in the emission on the first time slot interval.
14. power control method as claimed in claim 1 is characterized in that, obtains the required power level of current general control channel emission with following formula:
Δ DPCCH＝(-d×ΔTPC)+[TPC_comb(HS_end)+Y]×ΔTPC
In the formula: ' d ' value emission Dedicated Control Channel signal required general control channel power increment that is used to derive, ' TPC_comb (HS_end) ' is the power control numerical value of when soft handover a time slot of having finished after the emission of HS-DPCCH signal being obtained from the power control commands of all base stations with collection, ' Δ TPC ' is the power level that increases or reduce according to the unit power level, and ' Y ' is the numerical value of compensation because of the power control error of power anticlimax appearance.
15. a method of regulating up link special used for physical control channel DPCCH transmitting power during to soft handover with the terminal of first power control method emission DPCCH is characterized in that described method comprises:
After finishing High-Speed Dedicated Physical Control Channel HS-DPCCH emission, in K_algol time slot DPCCH is being launched application first power control method at least, the DPCCH transmitting power is still based on second power control method after K_algol time slot; Terminal is determined the DPCCH transmitting power for each transmission time slot in first power control method, and terminal is that unit determines the DPCCH transmitting power by N time slot group in second power control method.
16. the method for adjusting up link DPCCH transmitting power as claimed in claim 15, it is characterized in that also comprising step: after finishing the HS-DPCCH emission, from the N time slot group that behind K_algol time slot, occurs or the border of a M*N time slot group, use second power control method, wherein M is an arbitrary constant.
17. the method for adjusting up link DPCCH transmitting power as claimed in claim 15 is characterized in that, dynamically dwindles the scope of the time slot of using first power control method.
18. the method for adjusting up link DPCCH transmitting power as claimed in claim 16 is characterized in that, dynamically dwindles the scope of the time slot of using first power control method.
19. the method to the terminal adjusting uplink transmit power controlling of soft handover is characterized in that described method comprises:
Special used for physical control channel DPCCH emission control power is brought up to High-Speed Dedicated Physical Control Channel HS-DPCCH emission control power, thereby can launch HS-DPCCH; With
After having finished HS-DPCCH emission, HS-DPCCH emission control power subtracted get back to DPCCH emission control power.
20. method as claimed in claim 19 is characterized in that, HS-DPCCH emission control power is subtracted the step of getting back to DPCCH emission control power comprise compensation power control error.
21. method as claimed in claim 19 is characterized in that, terminal is used a plurality of time slots HS-DPCCH emission control power is subtracted the step of getting back to DPCCH emission control power.
22. method as claimed in claim 19 is characterized in that, a plurality of time slot groups are used DPCCH emission control power, each group has two time slots at least.
23. method as claimed in claim 22 is characterized in that, each independent time slot is used HS-DPCCH emission control power.
CNB200380100217XA 2002-11-04 2003-11-04 Uplink transmit power control method during terminal in soft handover Expired - Fee Related CN100555908C (en)

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