CN104994570A - Open loop power control method and device - Google Patents

Abstract

The embodiment of the invention discloses an open loop power control method and device, which aim to save transmitting power and increase the success rate of link establishment in an extreme channel environment. The method in the embodiment of the invention comprises the following steps: determining the open loop transmitting power of a current power rising period at the open loop power control stage of a downlink DPCH (Dedicated Physical Channel); detecting the synchronization status of an uplink DPCCH (Dedicated Physical Control Channel) which is paired with the downlink DPCH; when the synchronization status of the uplink DPCCH is determined to be a non-synchronization status, increasing the open loop transmitting power of the current power rising period according to a preset power rising step length to obtain the open loop transmitting power of a next power rising period; and when the synchronization status of the uplink DPCCH is determined to be a synchronization completion status, ending the open loop power control stage.

Description

A kind of open-loop power control method and device

Technical field

The present invention relates to the communications field, particularly relate to a kind of open-loop power control method and device.

Background technology

Third generation partner program (3rd Generation Partnership Project, 3GPP) agreement specifies that the Initial Trans of descending DHCP (Dynamic Host Configuration Protocol, DPCH) channel carries out open Loop Power control by NodeB.After completing up-downgoing DPCH channel synchronization, the power of descending DPCH controls to carry out close-loop power control according to transmitting power control (Transmission Power Control, the TPC) territory of the up DPCH channel with its pairing.

In prior art, open loop initial power is generally according to subscriber equipment (User Equipment, UE) Common Pilot Channel (the Common Pilot Channel reported, CPICH) intensity of institute's acknowledge(ment) signal and ratio (the Energy Chip/Noise of noise jamming level in, Ec/No) Ec/No and needed for current business carries out comprehensive estimate, then add that certain transmitting power surplus is as Initial Trans on this basis, also the fixed transmission power during being open Loop Power control, guarantee was carried out to link establishment success rate and the decline of uncertain environment.Especially when network side cannot obtain that UE reports in the recent period have a CPICH Ec/No of reference significance time, network side in order to ensure far away, in, near point UE all correctly can receive descending DPCH channel, have employed larger to cross guarantee open loop transmit power.

But, control owing to have employed fixing open loop transmit power, what remain unchanged during open Loop Power control crosses the Initial Trans ensured, on the one hand, for most of UE, although adopt the time of open Loop Power control shorter during each wireless link, but along with the permeability of current intelligent terminal improves, UE is from forward access channel (Forward Access Channel, FACH) state is to dedicated channel (Dedicated Channel, DCH) state and from paging channel (Panging Channel, PCH) switching to DCH state is extremely frequent, the power dissipation adopting this open Loop Power control to cause when causing a large amount of DPCH channels to be set up, on the other hand, for small part UE, the situation of down transmitting power lower than its power demand may be there is, cause wireless link failure.

Summary of the invention

Embodiments provide a kind of open-loop power control method and device, for saving transmitting power and the success rate of link establishment under raising extreme channels environment.

Embodiment of the present invention first aspect provides a kind of open-loop power control method, comprising:

The open Loop Power control stage of descending DPCH channel is divided into multiple power ramp cycle according to preset time period, the open loop transmit power in each power ramp cycle is not less than open loop Initial Trans, be not more than maximum open loop transmit power, described maximum open loop transmit power is determined according to described open loop Initial Trans, rise in the cycle in current power, output control device performs following operation:

Determine that current power rises the open loop transmit power in cycle;

Detect the synchronous regime with the up DPCCH channel of described descending DPCH channel pairs;

When the synchronous regime determining described up DPCCH channel is for time synchronous, promote current power to rise the open loop transmit power in cycle according to the preset power step-length that rises, obtain the open loop transmit power in next power ramp cycle;

When determining the synchronous regime of described up DPCCH channel for synchronously completing, terminate the described open Loop Power control stage.

In conjunction with the first aspect of the embodiment of the present invention, in the first implementation of embodiment of the present invention first aspect, describedly promote current power to rise the open loop transmit power in cycle according to the preset power step-length that rises, the open loop transmit power obtaining the next power ramp cycle specifically comprises:

Determine the open loop transmit power undetermined in next power ramp cycle, described transmitting power undetermined is that the rise open loop transmit power in cycle and described preset power of described current power rises step-length sum;

When described open loop transmit power undetermined is less than described maximum open loop transmit power, determine that the open loop transmit power in next power ramp cycle is described open loop transmit power undetermined;

When described open loop transmit power undetermined is not less than described maximum open loop transmit power, determine that the open loop transmit power in next power ramp cycle is described maximum open loop transmit power.

In conjunction with the first implementation of embodiment of the present invention first aspect, in the second implementation of embodiment of the present invention first aspect, described method also comprises:

According to effective CPICH Ec/No that UE reports, the CPICH channel emission power of network side, current set up wireless link business Ec/No valuation and the carrier transmit power that obtains of NodeB measurement, determine described open loop Initial Trans;

When not obtaining effective CPICH Ec/No, determine that described open loop Initial Trans is preset initial power.

In conjunction with the second implementation of embodiment of the present invention first aspect, in the third implementation of embodiment of the present invention first aspect, describedly determine that current power rises the open loop transmit power in cycle, specifically comprises:

If the described current power cycle of riseing is first power ramp cycle, then determine that the rise open loop transmit power in cycle of described current power is: described open loop Initial Trans;

If described current power rises, the cycle is not first power ramp cycle, then determine that the rise open loop transmit power in cycle of described current power is: the open loop transmit power in the described next power ramp cycle obtained in the upper power ramp cycle.

In conjunction with the second implementation of embodiment of the present invention first aspect, in the 4th kind of implementation of embodiment of the present invention first aspect, described method also comprises:

Arranging described maximum open loop transmit power is: the first default value and described open loop Initial Trans and, wherein, on described up DPCCH channel, the link quality requirement of bearer service is higher, and described first default value is larger.

In conjunction with the first aspect of the embodiment of the present invention to any one implementation in the 4th kind of implementation of first aspect, in the 5th kind of implementation of embodiment of the present invention first aspect, described method also comprises:

Add up the first duration, described first duration is the average duration adopting open Loop Power control in wireless link process;

According to described first duration, arrange described preset time period, described preset time period is less than described first duration.

In conjunction with the first aspect of the embodiment of the present invention to any one implementation in the 4th kind of implementation of first aspect, in the 6th kind of implementation of embodiment of the present invention first aspect, described method also comprises:

According to effective CPICH Ec/No that UE reports, arrange described preset power and to rise step-length, wherein, along with described CPICH Ec/No increases, the described preset power step-length that rises reduces;

When not obtaining effective CPICH Ec/No, adopting the second default value that described preset power is set and to rise step-length.

Embodiment of the present invention second aspect provides a kind of output control device, the open Loop Power control stage of descending DPCH channel is divided into multiple power ramp cycle according to preset time period, the open loop transmit power in each power ramp cycle is not less than open loop Initial Trans, be not more than maximum open loop transmit power, described maximum open loop transmit power is determined according to described open loop Initial Trans, and described output control device comprises:

First determination module, for determining that current power rises the open loop transmit power in cycle;

Detection module, for riseing in the cycle in current power, detects the synchronous regime with the up DPCCH channel of described descending DPCH channel pairs;

Power ascension module, for determining that when described detection module the synchronous regime of described up DPCCH channel is not for time synchronous, promote current power to rise the open loop transmit power in cycle according to the preset power step-length that rises, obtain the open loop transmit power in next power ramp cycle;

Terminating module, during for determining the synchronous regime of described up DPCCH channel when described detection module for synchronously completing, terminating the described open Loop Power control stage.

In conjunction with the second aspect of the embodiment of the present invention, in the first implementation of embodiment of the present invention second aspect, described power ascension module specifically comprises:

First determining unit, for determining the open loop transmit power undetermined in next power ramp cycle, described transmitting power undetermined is that the rise open loop transmit power in cycle and described preset power of described current power rises step-length sum;

Second determining unit, for when the open loop transmit power undetermined that described first determining unit is determined is less than described maximum open loop transmit power, determines that the open loop transmit power in next power ramp cycle is described open loop transmit power undetermined;

3rd determining unit, for when the open loop transmit power described undetermined that described first determining unit is determined is not less than described maximum open loop transmit power, determines that the open loop transmit power in next power ramp cycle is described maximum open loop transmit power.

In conjunction with the first implementation of embodiment of the present invention second aspect, in the second implementation of embodiment of the present invention second aspect, described output control device also comprises:

Second determination module, for the effective CPICH Ec/No reported according to UE, the CPICH channel emission power of network side, current set up wireless link business Ec/No valuation and the carrier transmit power that obtains of NodeB measurement, determine described open loop Initial Trans;

3rd determination module, for when not obtaining effective CPICH Ec/No, determines that described open loop Initial Trans is preset initial power.

In conjunction with the second implementation of embodiment of the present invention second aspect, in the third implementation of embodiment of the present invention second aspect, described first determination module specifically comprises:

4th determining unit, for when the described current power cycle of riseing is first power ramp cycle, determines that the rise open loop transmit power in cycle of described current power is: described open loop Initial Trans;

5th determining unit, for when the cycle of riseing is not first power ramp cycle when described current power, determine that the rise open loop transmit power in cycle of described current power is: the open loop transmit power in the described next power ramp cycle obtained in the upper power ramp cycle.

In conjunction with the second implementation of embodiment of the present invention second aspect, in the 4th kind of implementation of embodiment of the present invention second aspect, described output control device also comprises:

Second arranges module, for arranging described maximum open loop transmit power is: the first default value and described open loop Initial Trans and, wherein, on described up DPCCH channel, the link quality requirement of bearer service is higher, and described first default value is larger.

In conjunction with the second aspect of the embodiment of the present invention to the 4th kind of implementation of second aspect, in the 5th kind of implementation of embodiment of the present invention second aspect, described output control device also comprises:

Statistical module, for adding up the first duration, described first duration is the average duration adopting open Loop Power control in wireless link process;

3rd arranges module, for according to described first duration, arranges described preset time period, and wherein, described preset time period is less than described first duration, and described first duration is longer, and described preset time period is longer.

In conjunction with the second aspect of the embodiment of the present invention to the 4th kind of implementation of second aspect, in the 6th kind of implementation of embodiment of the present invention second aspect, described output control device also comprises:

4th arranges module, for the effective CPICH Ec/No reported according to UE, arranges described preset power and to rise step-length, and wherein, along with described CPICH Ec/No increases, the described preset power step-length that rises reduces;

5th arranges module, for when not obtaining effective CPICH Ec/No, adopting the second default value to arrange described preset power and to rise step-length.

As can be seen from the above technical solutions, the embodiment of the present invention has the following advantages: in the embodiment of the present invention, rise the cycle in the current power in open Loop Power control stage, output control device can detect the synchronous regime with the up DPCCH channel of descending DPCH channel pairs, if synchronous regime is not synchronous, then promote current power to rise the open loop transmit power in cycle, obtain the open loop transmit power in next power ramp cycle, so circulate according to the power ramp cycle taking preset time period as the cycle, until in some power ramp cycles, detect that synchronous regime is synchronously complete, then terminate the open Loop Power control stage, do not re-use fixing open loop transmit power like this, under general channel circumstance, the open loop transmit power less than existing fixing open loop transmit power can be used namely successfully to set up link, save transmitting power greatly, and under the short channel environment of pole, the open loop transmit power that can rise again instructs link establishment success, improve the success rate of link establishment.

Accompanying drawing explanation

Fig. 1 is Poewr control method schematic flow sheet in the embodiment of the present invention;

Fig. 2 is another schematic flow sheet of Poewr control method in the embodiment of the present invention;

Fig. 3 is open loop transmit power example schematic soaring in the embodiment of the present invention;

Fig. 4 is output control device structural representation in the embodiment of the present invention;

Fig. 5 is another structural representation of output control device in the embodiment of the present invention;

Fig. 6 is another structural representation of output control device in the embodiment of the present invention.

Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those skilled in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.

In the embodiment of the present invention, term " DPCH " is writing a Chinese character in simplified form of Dedicated Physical Channe, refers to DPCH;

Term " DPCCH " is writing a Chinese character in simplified form of Dedicated Physical Control Channel, refers to Dedicated Physical Control Channel;

Term " CPICH " is writing a Chinese character in simplified form of CommonPilot Channel Common Pilot Channel, refers to Common Pilot Channel;

Term " Ec/No " is writing a Chinese character in simplified form of the ratio of Energy Chip and Noise, refers to the intensity of institute's acknowledge(ment) signal and the ratio of noise jamming level." CPICH Ec/No " then refers to the intensity of institute's acknowledge(ment) signal and the ratio of noise jamming level in Common Pilot Channel, is a parameter of 3GPP agreement defined, does not repeat herein.

Refer to Fig. 1, in the embodiment of the present invention, open-loop power control method embodiment comprises:

101, determine that current power rises the open loop transmit power in cycle;

It should be noted that, the open Loop Power control stage of descending DPCH channel is divided into multiple power ramp cycle according to preset time period, the open loop transmit power in each power ramp cycle is not less than open loop Initial Trans, be not more than maximum open loop transmit power, described maximum open loop transmit power is determined according to described open loop Initial Trans.Rise in the cycle in current power, output control device performs step 101 to 104.

Rise the cycle in current power, output control device can determine that current power rises the open loop transmit power in cycle.When output control device determination current power rises the open loop transmit power in cycle, NodeB can attempt setting up wireless link with UE according to this open loop transmit power, as being successfully established, then should be synchronous completion status with the synchronous regime of the up DPCCH channel of descending DPCH channel pairs, otherwise, show that the rise open loop transmit power in cycle of current power is not enough.

Be understandable that, if the current power cycle of riseing is first power ramp cycle, then the open loop transmit power in cycle of current power can being risen is defined as this open loop Initial Trans, if current power rises, the cycle is not first power ramp cycle, the open loop transmit power in cycle of then current power can being risen is defined as the open loop transmit power in the next power ramp cycle obtained in the step 103 in a upper power ramp cycle, in actual applications, determine current power rise the open loop transmit power in cycle time, (be multiplied by or divided by certain value) or error calculation (adding or deduct certain value) can also be weighted on the basis of this open loop Initial Trans or the open loop transmit power in this next power ramp cycle, be not construed as limiting herein.

102, the synchronous regime of the up DPCCH channel of detection and descending DPCH channel pairs;

Be understandable that, the open Loop Power control stage is divided into multiple power ramp cycle according to preset time period, step 101 can perform when a power ramp cycle starts, in this preset time period, UE attempts setting up wireless link with UE according to the open loop transmit power in this power ramp cycle, be about to reach at this preset time period, namely this current power ramp cycle soon at the end of, just perform step 102, detect the synchronous regime with the up DPCCH channel of descending DPCH channel pairs, thus determine whether be successfully established with the wireless link of UE.

If synchronous regime is not synchronous, then perform step 103;

If synchronous regime is for synchronously to complete, then perform step 104.

103, when the synchronous regime determining described up DPCCH channel is for time synchronous, promote current power to rise the open loop transmit power in cycle according to the preset power step-length that rises, obtain the open loop transmit power in next power ramp cycle;

When determining that synchronous regime is not synchronous, show the open loop transmit power deficiency that the current power cycle of riseing is determined, then this output control device promotes current power to rise the open loop transmit power in cycle according to the preset power step-length that rises, and obtains the open loop transmit power in next power ramp cycle.Current power rise end cycle time, enter the next power ramp cycle, rise the cycle as new current power, continue perform step 101 to 104.

104, when determining the synchronous regime of described up DPCCH channel for synchronously completing, the described open Loop Power control stage is terminated;

Be understandable that, after terminating the open Loop Power control stage, output control device can carry out close-loop power control according to the through-put power territory TPC of described up DPCCH channel to described descending DPCH channel, is not construed as limiting herein.

In the embodiment of the present invention, rise the cycle in the current power in open Loop Power control stage, output control device can detect the synchronous regime with the up DPCCH channel of descending DPCH channel pairs, if synchronous regime is not synchronous, then promote current power to rise the open loop transmit power in cycle, obtain the open loop transmit power in next power ramp cycle, so circulate according to the power ramp cycle taking preset time period as the cycle, until in some power ramp cycles, detect that synchronous regime is synchronously complete, then terminate the open Loop Power control stage, do not re-use fixing open loop transmit power like this, under general channel circumstance, the open loop transmit power less than existing fixing open loop transmit power can be used namely successfully to set up link, save transmitting power greatly, and under the short channel environment of pole, the open loop transmit power that can rise again instructs link establishment success, improve the success rate of link establishment.Show according to test result, adopt the open-loop power control method that the embodiment of the present invention proposes, the descending DPCH power of single user can be made relatively to save between 5%-15%, and by the Reasonable adjustment of parameter, link establishment success rate and link establishment duration are not had a negative impact, effectively save the power during descending DPCH channel open Loop Power control.

Above in embodiment, the open Loop Power control stage is divided into multiple power ramp cycle according to preset time period, promote current power to rise the open loop transmit power in cycle according to the preset power step-length that rises, in actual applications, this preset time period and this preset power step-length that rises can pre-set, in addition, open loop Initial Trans and maximum transmission power etc. can also be pre-set, below open-loop power control method in the embodiment of the present invention is specifically described:

Refer to Fig. 2, in the embodiment of the present invention, open-loop power control method comprises:

201, preset time period is set;

It should be noted that, the open Loop Power control stage of descending DPCH channel is divided into multiple power ramp cycle according to preset time period, the open loop transmit power in each power ramp cycle is not less than open loop Initial Trans, be not more than maximum open loop transmit power, described maximum open loop transmit power is determined according to described open loop Initial Trans.

This preset time period be provided with various ways: optional, can be specified by developer; Optionally, also the first duration can first be added up, described first duration is the average duration adopting open Loop Power control in wireless link process, namely from descending DPCH, be sent to the synchronous average duration of up DPCCH, again according to described first duration, arrange described preset time period, described preset time period and described first duration proportional, described preset time period is less than described first duration.

Such as, this preset time period can be set according to following formula 1:

Ramp_Period=OpenLoop_Period/K, K>0; Formula 1

Wherein, Ramp_Period represents described preset time period, and OpenLoop_Period represents described first duration.Such as, K can value be 2.Be understandable that, K can also get other and more be worth, and in actual applications, can also carry out more computing and obtain this preset time period, be not construed as limiting herein on the basis of this first duration.

202, arrange preset power to rise step-length;

Can power ramp be carried out in step 205, power ramp step-length can be pre-set.

Concrete, if output control device can obtain effective CPICH Ec/No, effective CPICH Ec/No that described output control device can report according to UE, arrange described preset power to rise step-length, wherein, along with described CPICH Ec/No increases, described preset power rise step-length reduce;

Such as, this preset power can be arranged according to following formula 2 to rise step-length:

Ramp_Step=a* (E _c/ N ₀) _cPICH+ b; Formula 2

Wherein, a, b are constant, and Ramp_Step represents that preset power rises step-length, (E _c/ N ₀) _cPICHrepresent effective CPICH Ec/No that UE reports in the recent period.Wherein, along with described CPICH Ec/No increases, the described preset power step-length that rises reduces, and namely a is negative value, such as, can get negative 0.2, b and can get 1 by a, by Ramp_Step and (E _c/ N ₀) _cPICHbe associated, make network side be that near-end UE trends towards configuring less soaring step-length, for far-end UE trends towards configuring larger soaring step-length.

If when output control device does not obtain effective CPICH Ec/No, then can adopt the second default value that described preset power is set and to rise step-length.Such as adopt default value-3dB to arrange this preset power to rise step-length.

203, maximum open loop transmit power is set;

Output control device can arrange described maximum open loop transmit power: the first default value and described open loop Initial Trans and, wherein, on described up DPCCH channel, the link quality requirement of bearer service is higher, and described first default value is larger.

204, open loop Initial Trans is determined;

If output control device obtains effective CPICH Ec/No that UE reports, then this output control device can according to the CPICH channel emission power of this effective CPICH Ec/No, network side, current set up wireless link business Ec/No valuation and the carrier transmit power that obtains of NodeB measurement, determine described open loop Initial Trans, such as, open loop Initial Trans can be calculated according to following formula 3:

$P_{Tx}^{Initial}=\[{(E_c/N_0)}_{DPCH}\]\[\frac{CPICH\_T_x\_power}{{(E_c/N_0)}_{CPICH}}-{\mathrm{\αP}}_{txTotal}\]$ Formula 3;

Wherein, represent open loop Initial Trans, (E _c/ N ₀) _cPICHrepresent effective CPICH Ec/No, CPICH_T that UE reports in the recent period _x_ power represents the CPICH channel emission power of network side, (E _c/ N ₀) _dPCHrepresent current Ec/No valuation of setting up wireless link business, P _txTotalfor the carrier transmit power that NodeB measurement obtains, α is the downstream Quadrature factor, can be set to 0.

Be understandable that, be only a citing herein, in addition, other formulae discovery open loop Initial Trans can also be adopted, be not construed as limiting herein.

If output control device can not get not obtaining effective CPICH Ec/No, then this output control device can determine that Initial Trans is preset initial power, this preset initial power can be selected according to the actual requirements, and this preset initial power is less than existing fixed transmission power.

Be understandable that, step 201,202,203, execution sequence does not limit between 204 each steps.

Output control device is determined, as above after parameter, according to this preset time period, the open Loop Power control stage to be divided into multiple power ramp cycle, performs following steps 205 to 208 in each power ramp cycle:

205, rise the cycle in current power, determine that current power rises the open loop transmit power in cycle;

Be first power ramp cycle if current, then determine that the rise open loop transmit power in cycle of current power is the open loop Initial Trans determined in step 204;

If be not first power ramp cycle current, then the rise open loop transmit power in cycle of current power is the open loop transmit power in the next power ramp cycle obtained in the step 207 in a upper power ramp cycle.

206, the synchronous regime of the up DPCCH channel of detection and described descending DPCH channel pairs;

Be understandable that, the open Loop Power control stage is divided into multiple power ramp cycle according to preset time period, step 205 can perform when a power ramp cycle starts, in this preset time period, UE attempts setting up wireless link with UE according to the open loop transmit power in this power ramp cycle, be about to reach at this preset time period, namely this current power ramp cycle soon at the end of, just perform step 206, detect the synchronous regime with the up DPCCH channel of descending DPCH channel pairs, thus determine whether be successfully established with the wireless link of UE.

If synchronous regime is not synchronous, then perform step 207;

If synchronous regime is for synchronously to complete, then perform step 208.

207, when the synchronous regime determining described up DPCCH channel is for time synchronous, promote current power to rise the open loop transmit power in cycle according to the preset power step-length that rises, obtain the open loop transmit power in next power ramp cycle;

When determining that synchronous regime is not synchronous, show the open loop transmit power deficiency that the current power cycle of riseing is determined, then this output control device promotes current power to rise the open loop transmit power in cycle according to the preset power step-length that rises, and obtains the open loop transmit power in next power ramp cycle.Current power rise end cycle time, enter the next power ramp cycle, rise the cycle as new current power, continue perform step 205 to 205.

Concrete, such as promote current power according to following formula 4 and to rise the open loop transmit power in cycle, obtain the open loop transmit power in next power ramp cycle:

$P_{Tx}^{n+1}=P_{Tx}^n+Ramp\_Step;$ Formula 4

Wherein, represent that current power rises the open loop transmit power in cycle, represent the open loop transmit power in next power ramp cycle, Ramp_Step represents that described preset power rises step-length.

In actual applications, restriction can also be carried out to the open loop transmit power in next power ramp cycle to upgrade, the open loop transmit power in the described next power ramp cycle even calculated is greater than preset maximum open loop transmit power, then using the open loop transmit power of this maximum open loop transmit power as the next power ramp cycle, thus the descending DPCH channel that the power after restriction renewal is used for the next power ramp cycle sends.Following formula 5 such as can be adopted to represent:

$P_{Tx}^{n+1}=Min(P_{Tx}^{Max},P_{Tx}^{n+1});$

Wherein, for the maximum open loop transmit power arranged in step 203.

As open loop transmit power example schematic that Fig. 3 is soaring in the embodiment of the present invention, if synchronous regime is not synchronous always, then according to this preset time period Ramp_Period, open loop transmit power is promoted with the preset power step-length Ramp_Step that rises, until reach maximum open loop transmit power (maximum power-limiting), or the synchronizer detected is for synchronously to complete.

208, when determining the synchronous regime of described up DPCCH channel for synchronously completing, the described open Loop Power control stage is terminated;

Be understandable that, after terminating the open Loop Power control stage, output control device can carry out close-loop power control according to the through-put power territory TPC of described up DPCCH channel to described descending DPCH channel, is not construed as limiting herein.Embodiment is with reference to 3GPP related protocol and prior art.

In the embodiment of the present invention, pre-set preset time period, preset power rise step-length, the parameter such as maximum open loop transmit power, open loop Initial Trans, ensure that this open-loop power control method accurate, perform smoothly, achieve and save transmitting power and the object of the success rate of link establishment under improving extreme channels environment.

For ease of understanding, with an embody rule scene, open-loop power control method in the embodiment of the present invention is specifically described below:

It is 10dB that output control device arranges open loop Initial Trans, and preset time period is 1s, and power ramp step-length is 3dB with it, and maximum open loop transmit power is 30dB;

First power ramp cycle, determine that the rise open loop transmit power in cycle of current power is 10dB (open loop Initial Trans);

At the end of preset time period 1s (first power ramp cycle) is fast, detects the synchronous regime with the up DPCCH channel of descending DPCH channel pairs, be defined as non-synchronous regime;

Promote current power to rise the open loop transmit power 10dB in cycle according to the preset power step-length 3dB that rises, obtain the open loop transmit power 13dB in next power ramp cycle;

Second power ramp cycle, determine that the rise open loop transmit power in cycle of current power is 13dB (open loop transmit power in the next power ramp cycle determined in the upper power ramp cycle);

At the end of preset time period 1s (second power ramp cycle) is fast, detects the synchronous regime with the up DPCCH channel of descending DPCH channel pairs, be defined as non-synchronous regime;

Promote current power to rise the open loop transmit power 13dB in cycle according to the preset power step-length 3dB that rises, obtain the open loop transmit power 16dB in next power ramp cycle;

At the end of preset time period 1s (second power ramp cycle) is fast, detects the synchronous regime with the up DPCCH channel of descending DPCH channel pairs, be defined as synchronous regime;

Terminate the open Loop Power control stage, according to the TPC of up DPCCH channel, close-loop power control is carried out to this descending DPCH channel

Below the output control device in the embodiment of the present invention is described:

Refer to Fig. 4, in the embodiment of the present invention, output control device embodiment comprises:

First determination module 401, for determining that current power rises the open loop transmit power in cycle, wherein, the open Loop Power control stage of descending DPCH channel is divided into multiple power ramp cycle according to preset time period, the open loop transmit power in each power ramp cycle is not less than open loop Initial Trans, be not more than maximum open loop transmit power, described maximum open loop transmit power is determined according to described open loop Initial Trans;

Detection module 402, for riseing in the cycle in current power, detects the synchronous regime with the up DPCCH channel of described descending DPCH channel pairs;

Power ascension module 403, for determining that when described detection module 402 synchronous regime of described up DPCCH channel is not for time synchronous, promote current power to rise the open loop transmit power in cycle according to the preset power step-length that rises, obtain the open loop transmit power in next power ramp cycle;

Terminating module 404, during for determining the synchronous regime of described up DPCCH channel when described detection module 402 for synchronously completing, terminating the described open Loop Power control stage.

In the embodiment of the present invention, rise the cycle in the current power in open Loop Power control stage, detection module 402 can detect the synchronous regime with the up DPCCH channel of descending DPCH channel pairs, if synchronous regime is not synchronous, then power ascension module 403 promotes current power and to rise the open loop transmit power in cycle, obtain the open loop transmit power in next power ramp cycle, so circulate according to the power ramp cycle taking preset time period as the cycle, until in some power ramp cycles, detection module 402 detects that synchronous regime is synchronously complete, then terminate module 404 and terminate the open Loop Power control stage, do not re-use fixing open loop transmit power like this, under general channel circumstance, the open loop transmit power less than existing fixing open loop transmit power can be used namely successfully to set up link, save transmitting power greatly, and under the short channel environment of pole, the open loop transmit power that can rise again instructs link establishment success, improve the success rate of link establishment.Show according to test result, adopt the open-loop power control method that the embodiment of the present invention proposes, the descending DPCH power of single user can be made relatively to save between 5%-15%, and by the Reasonable adjustment of parameter, link establishment success rate and link establishment duration are not had a negative impact, effectively save the power during descending DPCH channel open Loop Power control.

Be specifically described the output control device in the embodiment of the present invention below, refer to Fig. 5, in the embodiment of the present invention, another embodiment of output control device comprises:

First determination module 501, for determining that current power rises the open loop transmit power in cycle, wherein, the open Loop Power control stage of descending DPCH channel is divided into multiple power ramp cycle according to preset time period, the open loop transmit power in each power ramp cycle is not less than open loop Initial Trans, be not more than maximum open loop transmit power, described maximum open loop transmit power is determined according to described open loop Initial Trans;

Detection module 502, for riseing in the cycle in current power, detects the synchronous regime with the up DPCCH channel of described descending DPCH channel pairs;

Power ascension module 503, for determining that when described detection module 502 synchronous regime of described up DPCCH channel is not for time synchronous, promote current power to rise the open loop transmit power in cycle according to the preset power step-length that rises, obtain the open loop transmit power in next power ramp cycle;

Terminating module 504, during for determining the synchronous regime of described up DPCCH channel when described detection module 502 for synchronously completing, terminating the described open Loop Power control stage;

In the present embodiment, optionally, described power ascension module 503 specifically comprises:

First determining unit 5031, for determining the open loop transmit power undetermined in next power ramp cycle, described transmitting power undetermined is that the rise open loop transmit power in cycle and described preset power of described current power rises step-length sum;

Second determining unit 5032, for when the open loop transmit power undetermined that described first determining unit 5031 is determined is less than described maximum open loop transmit power, determines that the open loop transmit power in next power ramp cycle is described open loop transmit power undetermined;

3rd determining unit 5032, for when the open loop transmit power described undetermined that described first determining unit 5031 is determined is not less than described maximum open loop transmit power, determines that the open loop transmit power in next power ramp cycle is described maximum open loop transmit power;

Optionally, described output control device can also comprise:

Second determination module, for the effective CPICH Ec/No reported according to UE, the CPICH channel emission power of network side, current set up wireless link business Ec/No valuation and the carrier transmit power that obtains of NodeB measurement, determine described open loop Initial Trans;

3rd determination module, for when not obtaining effective CPICH Ec/No, determines that described open loop Initial Trans is preset initial power;

Optionally, described first determination module 501 specifically can comprise:

4th determining unit, for when the described current power cycle of riseing is first power ramp cycle, determines that the rise open loop transmit power in cycle of described current power is: described open loop Initial Trans;

5th determining unit, for when the cycle of riseing is not first power ramp cycle when described current power, determine that the rise open loop transmit power in cycle of described current power is: the open loop transmit power in the described next power ramp cycle obtained in the upper power ramp cycle;

Optionally, described output control device can also comprise:

Second arranges module, for arranging described maximum open loop transmit power is: the first default value and described open loop Initial Trans and, wherein, on described up DPCCH channel, the link quality requirement of bearer service is higher, and described first default value is larger;

Optionally, described output control device can also comprise:

Statistical module, for adding up the first duration, described first duration is the average duration adopting open Loop Power control in wireless link process;

3rd arranges module, for according to described first duration, arranges described preset time period, and wherein, described preset time period is less than described first duration, and described first duration is longer, and described preset time period is longer;

Optionally, described output control device can also comprise:

4th arranges module, for the effective CPICH Ec/No reported according to UE, arranges described preset power and to rise step-length, and wherein, along with described CPICH Ec/No increases, the described preset power step-length that rises reduces;

5th arranges module, for when not obtaining effective CPICH Ec/No, adopting the second default value to arrange described preset power and to rise step-length.

In the embodiment of the present invention, 3rd arranges module 508 pre-sets preset time period, the 4th and arranges module 509 and the 5th and arrange module 510 and arrange the preset power step-length, second that rises and arrange module 506 and arrange maximum open loop transmit power, the second determination module 504 and the 3rd determination module 505 and determine the parameters such as open loop Initial Trans, ensure that this open-loop power control method accurate, perform smoothly, achieve and save transmitting power and the object of the success rate of link establishment under improving extreme channels environment.

Refer to Fig. 6, in the embodiment of the present invention, another embodiment of output control device comprises:

Transceiver 601, processor 602 and memory 603 (quantity of the processor 603 wherein in output control device 600 can be one or more, for a processor 603 in Fig. 6).In some embodiments of the invention, transceiver 601, processor 602 are connected by bus or alternate manner with memory 603, wherein, to be connected by bus in Fig. 6.

Wherein, by calling the operational order that memory 603 stores, processor 602, for performing following steps:

Determine that current power rises the open loop transmit power in cycle, wherein, the open Loop Power control stage of descending DPCH channel is divided into multiple power ramp cycle according to preset time period, the open loop transmit power in each power ramp cycle is not less than open loop Initial Trans, be not more than maximum open loop transmit power, described maximum open loop transmit power is determined according to described open loop Initial Trans;

Detect the synchronous regime with the up DPCCH channel of described descending DPCH channel pairs;

When the synchronous regime determining described up DPCCH channel is for time synchronous, promote current power to rise the open loop transmit power in cycle according to the preset power step-length that rises, obtain the open loop transmit power in next power ramp cycle;

When determining the synchronous regime of described up DPCCH channel for synchronously completing, terminate the described open Loop Power control stage;

In some embodiments of the present invention, described processor 602 performs and described promote current power to rise the open loop transmit power in cycle according to the preset power step-length that rises, when obtaining the step of the open loop transmit power in next power ramp cycle, specifically perform following steps:

Determine the open loop transmit power undetermined in next power ramp cycle, described transmitting power undetermined is that the rise open loop transmit power in cycle and described preset power of described current power rises step-length sum;

When described open loop transmit power undetermined is less than described maximum open loop transmit power, determine that the open loop transmit power in next power ramp cycle is described open loop transmit power undetermined;

When described open loop transmit power undetermined is not less than described maximum open loop transmit power, determine that the open loop transmit power in next power ramp cycle is described maximum open loop transmit power;

In some embodiments of the present invention, described processor 602 also performs following steps:

According to effective CPICH Ec/No that UE reports, the CPICH channel emission power of network side, current set up wireless link business Ec/No valuation and the carrier transmit power that obtains of NodeB measurement, determine described open loop Initial Trans;

When not obtaining effective CPICH Ec/No, determine that described open loop Initial Trans is preset initial power;

In some embodiments of the present invention, described processor 602 also performs following steps:

When the described current power cycle of riseing is first power ramp cycle, determine that the rise open loop transmit power in cycle of described current power is: described open loop Initial Trans;

When the described current power cycle of riseing is not first power ramp cycle, determine that the rise open loop transmit power in cycle of described current power is: the open loop transmit power in the described next power ramp cycle obtained in the upper power ramp cycle;

In some embodiments of the present invention, described processor 602 also performs following steps:

Arranging described maximum open loop transmit power is: the first default value and described open loop Initial Trans and, wherein, on described up DPCCH channel, the link quality requirement of bearer service is higher, and described first default value is larger;

In some embodiments of the present invention, described processor 602 also performs following steps:

Add up the first duration, described first duration is the average duration adopting open Loop Power control in wireless link process;

According to described first duration, arrange described preset time period, described preset time period is less than described first duration;

In some embodiments of the present invention, described processor 602 also performs following steps:

According to effective CPICH Ec/No that UE reports, arrange described preset power and to rise step-length, wherein, along with described CPICH Ec/No increases, the described preset power step-length that rises reduces;

When not obtaining effective CPICH Ec/No, adopting the second default value that described preset power is set and to rise step-length.

Those skilled in the art can be well understood to, and for convenience and simplicity of description, the system of foregoing description, the specific works process of device and unit, with reference to the corresponding process in preceding method embodiment, can not repeat them here.

In several embodiments that the application provides, should be understood that, disclosed system, apparatus and method, can realize by another way.Such as, device embodiment described above is only schematic, such as, the division of described unit, be only a kind of logic function to divide, actual can have other dividing mode when realizing, such as multiple unit or assembly can in conjunction with or another system can be integrated into, or some features can be ignored, or do not perform.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be by some interfaces, and the indirect coupling of device or unit or communication connection can be electrical, machinery or other form.

The described unit illustrated as separating component or can may not be and physically separates, and the parts as unit display can be or may not be physical location, namely can be positioned at a place, or also can be distributed in multiple network element.Some or all of unit wherein can be selected according to the actual needs to realize the object of the present embodiment scheme.

In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, also can be that the independent physics of unit exists, also can two or more unit in a unit integrated.Above-mentioned integrated unit both can adopt the form of hardware to realize, and the form of SFU software functional unit also can be adopted to realize.

If described integrated unit using the form of SFU software functional unit realize and as independently production marketing or use time, can be stored in a computer read/write memory medium.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words or all or part of of this technical scheme can embody with the form of software product, this computer software product is stored in a storage medium, comprising some instructions in order to make a computer equipment (can be personal computer, server, or the network equipment etc.) perform all or part of step of method described in each embodiment of the present invention.And aforesaid storage medium comprises: USB flash disk, portable hard drive, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disc or CD etc. various can be program code stored medium.

The above, above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.

Claims (14)

1. an open-loop power control method, is characterized in that, comprising:

The open Loop Power control stage of descending DPCH channel is divided into multiple power ramp cycle according to preset time period, the open loop transmit power in each power ramp cycle is not less than open loop Initial Trans, be not more than maximum open loop transmit power, described maximum open loop transmit power is determined according to described open loop Initial Trans, rise in the cycle in current power, output control device performs following operation:

Determine that current power rises the open loop transmit power in cycle;

Detect the synchronous regime with the up DPCCH channel of described descending DPCH channel pairs;

When the synchronous regime determining described up DPCCH channel is for time synchronous, promote current power to rise the open loop transmit power in cycle according to the preset power step-length that rises, obtain the open loop transmit power in next power ramp cycle;

When determining the synchronous regime of described up DPCCH channel for synchronously completing, terminate the described open Loop Power control stage.

2. method according to claim 1, is characterized in that, describedly promotes current power to rise the open loop transmit power in cycle according to the preset power step-length that rises, and the open loop transmit power obtaining the next power ramp cycle specifically comprises:

Determine the open loop transmit power undetermined in next power ramp cycle, described transmitting power undetermined is that the rise open loop transmit power in cycle and described preset power of described current power rises step-length sum;

When described open loop transmit power undetermined is less than described maximum open loop transmit power, determine that the open loop transmit power in next power ramp cycle is described open loop transmit power undetermined;

When described open loop transmit power undetermined is not less than described maximum open loop transmit power, determine that the open loop transmit power in next power ramp cycle is described maximum open loop transmit power.

3. method according to claim 2, is characterized in that, described method also comprises:

According to effective CPICH Ec/No that UE reports, the CPICH channel emission power of network side, current set up wireless link business Ec/No valuation and the carrier transmit power that obtains of NodeB measurement, determine described open loop Initial Trans;

When not obtaining effective CPICH Ec/No, determine that described open loop Initial Trans is preset initial power.

4. method according to claim 3, is characterized in that, describedly determines that current power rises the open loop transmit power in cycle, specifically comprises:

If the described current power cycle of riseing is first power ramp cycle, then determine that the rise open loop transmit power in cycle of described current power is: described open loop Initial Trans;

If described current power rises, the cycle is not first power ramp cycle, then determine that the rise open loop transmit power in cycle of described current power is: the open loop transmit power in the described next power ramp cycle obtained in the upper power ramp cycle.

5. method according to claim 3, is characterized in that, described method also comprises:

Arranging described maximum open loop transmit power is: the first default value and described open loop Initial Trans and, wherein, on described up DPCCH channel, the link quality requirement of bearer service is higher, and described first default value is larger.

6. method according to any one of claim 1 to 5, is characterized in that, described method also comprises:

Add up the first duration, described first duration is the average duration adopting open Loop Power control in wireless link process;

According to described first duration, arrange described preset time period, described preset time period is less than described first duration.

7. method according to any one of claim 1 to 5, is characterized in that, described method also comprises:

According to effective CPICH Ec/No that UE reports, arrange described preset power and to rise step-length, wherein, along with described CPICH Ec/No increases, the described preset power step-length that rises reduces;

When not obtaining effective CPICH Ec/No, adopting the second default value that described preset power is set and to rise step-length.

8. an output control device, it is characterized in that, the open Loop Power control stage of descending DPCH channel is divided into multiple power ramp cycle according to preset time period, the open loop transmit power in each power ramp cycle is not less than open loop Initial Trans, be not more than maximum open loop transmit power, described maximum open loop transmit power is determined according to described open loop Initial Trans, and described output control device comprises:

First determination module, for determining that current power rises the open loop transmit power in cycle;

Detection module, for riseing in the cycle in current power, detects the synchronous regime with the up DPCCH channel of described descending DPCH channel pairs;

Power ascension module, for determining that when described detection module the synchronous regime of described up DPCCH channel is not for time synchronous, promote current power to rise the open loop transmit power in cycle according to the preset power step-length that rises, obtain the open loop transmit power in next power ramp cycle;

Terminating module, during for determining the synchronous regime of described up DPCCH channel when described detection module for synchronously completing, terminating the described open Loop Power control stage.

9. output control device according to claim 8, is characterized in that, described power ascension module specifically comprises:

First determining unit, for determining the open loop transmit power undetermined in next power ramp cycle, described transmitting power undetermined is that the rise open loop transmit power in cycle and described preset power of described current power rises step-length sum;

Second determining unit, for when the open loop transmit power undetermined that described first determining unit is determined is less than described maximum open loop transmit power, determines that the open loop transmit power in next power ramp cycle is described open loop transmit power undetermined;

3rd determining unit, for when the open loop transmit power described undetermined that described first determining unit is determined is not less than described maximum open loop transmit power, determines that the open loop transmit power in next power ramp cycle is described maximum open loop transmit power.

10. output control device according to claim 9, is characterized in that, described output control device also comprises:

Second determination module, for the effective CPICH Ec/No reported according to UE, the CPICH channel emission power of network side, current set up wireless link business Ec/No valuation and the carrier transmit power that obtains of NodeB measurement, determine described open loop Initial Trans;

3rd determination module, for when not obtaining effective CPICH Ec/No, determines that described open loop Initial Trans is preset initial power.

11. output control devices according to claim 10, is characterized in that, described first determination module specifically comprises:

4th determining unit, for when the described current power cycle of riseing is first power ramp cycle, determines that the rise open loop transmit power in cycle of described current power is: described open loop Initial Trans;

5th determining unit, for when the cycle of riseing is not first power ramp cycle when described current power, determine that the rise open loop transmit power in cycle of described current power is: the open loop transmit power in the described next power ramp cycle obtained in the upper power ramp cycle.

12. output control devices according to claim 10, is characterized in that, described output control device also comprises:

Second arranges module, for arranging described maximum open loop transmit power is: the first default value and described open loop Initial Trans and, wherein, on described up DPCCH channel, the link quality requirement of bearer service is higher, and described first default value is larger.

Output control device according to any one of 13. according to Claim 8 to 12, is characterized in that, described output control device also comprises:

Statistical module, for adding up the first duration, described first duration is the average duration adopting open Loop Power control in wireless link process;

3rd arranges module, for according to described first duration, arranges described preset time period, and wherein, described preset time period is less than described first duration, and described first duration is longer, and described preset time period is longer.

Output control device according to any one of 14. according to Claim 8 to 12, is characterized in that, described output control device also comprises:

4th arranges module, for the effective CPICH Ec/No reported according to UE, arranges described preset power and to rise step-length, and wherein, along with described CPICH Ec/No increases, the described preset power step-length that rises reduces;

5th arranges module, for when not obtaining effective CPICH Ec/No, adopting the second default value to arrange described preset power and to rise step-length.