CN102111861B - Method and equipment for controlling power of downlink control channel - Google Patents

Abstract

The invention discloses a method and equipment for controlling the power of a downlink control channel, which comprises the following steps: determining a non-adjoint DPCH (Dedicated Physical Channel) when the power of the downlink control channel is needed to control; and controlling the power of the channel according to the information on the non-adjoint DPCH. When being implemented even though under the condition of removing an adjoint channel, the invention still has the advantages that the property of the downlink control channel can be guaranteed and the system volume is improved.

Description

A kind of Poewr control method of down control channel and equipment

Technical field

The present invention relates to mobile communication technology, particularly a kind of Poewr control method of down control channel and equipment.

Background technology

At TDD (Time Division Duplex, time division duplex) in the prior art of system, need to follow DPCH (Dedicated Physical Channel for what each grouping user was distributed a pair of special use, DPCH) channel is to maintain uplink synchronous, and the number of users that such system can be supported simultaneously will be limited to the configuration requirement of dedicated channel.And at HSPA+ (High Speed Packet Access Plus, high-speed packet access enhancing) in system, can use HSDPA (High-Speed downlink packet access completely, high speed downlink packet accesses) and HSUPA (High-Speed Uplink packet access, high speed uplink packet access) mode combining is transmitted data, maintains uplink synchronous simultaneously.Therefore, in HSPA+, propose to remove to follow DPCH channel, so that the grouping user capacity of elevator system.Like this, can allow more user for a long time under CELL-DCH (cell dedicated channel status) state, avoid transition between states brings frequently data transmission delay and signaling consumption.

Removed and followed after DPCH, can support HSPA+'s, comprise that CPC (Continuous PacketConnection continues grouping and connects) and CELL-FACH (cell Forward Access Channel, community-forward access channel) strengthen two kinds of technology.

In the CPC of HSPA+, having introduced semi-continuous resource distributes, by HS-PDSCH (High SpeedPhysical Downlink Shared Channel, high speed down sharing physical channel), carry out the downlink transfer of VoIP (Voiceover IP, IP-based voice transfer) business.Base station is by control channel HS-SCCH (High-Speed shared control channel, High-Speed Shared Control Channel) be UE (UserEquipment, subscriber equipment) the semi-continuous resource of distribution or reprovision special use, can also change semi-continuous resource distribution or regain semi-continuous resource by sending HS-SCCH.In the process of semi-continuous resource transmission business, no longer send HS-SCCH, HS-PDSCH sends data according to pre-configured semi-continuous resource.Because the data of VoIP business arrive, have certain regularity, base station, by semi-continuous scheduling, can greatly reduce the number of times that sends HS-SCCH.And, can be when business generation state be changed, must change resource by HS-SCCH and distribute in time, guaranteeing, under the prerequisite of QoS of survice (Quality of Service, quality of service), to improve resource utilization and cell throughout.Equally, by scheduling E-PUCH (E-DCH Physical Uplink Channel, E-DCH physical uplink channel; E-DCH:EnhancedDedicated Transport Channel, enhanced dedicated) VoIP is carried out to uplink, also adopt semi-continuous resource allocation methods, E-AGCH (E-DCH Absolute Grant Channel, E-DCH absolute grant channel) just just sends when distribution or the semi-continuous resource of reprovision.

Because semi-continuous resource is distributed or reshuffles to belong at a slow speed and adjust, interval time is long, like this in CPC process, HS-SCCH and E-AGCH send interval can be larger, conventional Poewr control method cannot be adjusted the variation of transmitted power tracking environmental timely, so can cause the performance of HS-SCCH and E-AGCH to worsen.

In the CELL-FACH of HSPA+ state strengthens, with the up-downgoing of HSDPA and HSUPA carrying related service, transmit respectively, by base station scheduling, transmit data, feature due to CELL-FACH bearer service, transfer of data interval is larger, power control effect for control channel has obvious impact, and can not configure and follow DPCH, there is no corresponding power reference.If the degradation of control channel, can affect the performance of whole system.

In existing power control, in order to guarantee the performance of control channel, if scheduling interval is larger, control channel is with reference to following the transmitted power of DPCH to adjust.

The deficiencies in the prior art are: along with the development of technology, increasing user can adopt HSPA technology, and in order to support more user, the development trend of technology is removed exactly and followed DPCH.But, for HSPA, along with the number of users of supporting increases, can be larger to user's scheduling interval, and also have now technical scheme to realize the how power of handling control channel, do not control, in order to guarantee the performance of control channel, and can meet the requirement of system.

Summary of the invention

Technical problem solved by the invention has been to provide a kind of Poewr control method and equipment of down control channel, in order to solve the problem of down control channel being carried out to power control after following DPCH removing.

The Poewr control method that a kind of down control channel is provided in the embodiment of the present invention, comprises the steps:

When needs carry out power control to down control channel, determine the non-DPCH of following;

The channel that need is carried out to power control according to the information on the non-DPCH of following carries out power control.

Preferably, when UE accesses by DCH:

The non-DPCH of following is DCH channel;

At the channel that need is carried out to power control according to the information on the non-DPCH of following, carry out power while controlling, according to the transmitted power of DCH channel, determine the transmitted power of down control channel.

Preferably, when UE accesses by FACH:

The non-DPCH of following is FACH channel;

At the channel that need is carried out to power control according to the information on the non-DPCH of following, carry out power while controlling, according to the transmitted power of FACH channel, determine the transmitted power of down control channel.

Preferably, when UE strengthens access by FACH:

At the channel that need is carried out to power control according to the information on the non-DPCH of following, carry out power while controlling, the transmitted power of determining down control channel according to the path loss of RNC notice and up ISCP information.

Preferably, the transmitted power that the path loss of notifying according to RNC and up ISCP information are determined down control channel, comprising:

Described path loss is RNC in base station for the first time by before public H-RNTI dispatch terminal, the path loss by FP frame to base station notification terminal;

Described ISCP is the ISCP information of E-PUCH time slot;

The transmitted power of determining the down control channel of public H-RNTI is: PC=SNR _target+ ISCP+ Δ+L-10log (16/N _{down control channel}), wherein, the transmitted power that PC is down control channel, the surplus that Δ is considered for offsetting shadow fading, SIR _targetfor the demodulation threshold of down control channel, L is path loss information.

Preferably, in the normal consistency process of UE:

The non-DPCH of following is HS-PDSCH channel;

At the channel that need is carried out to power control according to the information on the non-DPCH of following, carry out power while controlling, according to the power of semi-continuous scheduling HS-PDSCH channel and CQI information, determine the open loop transmitted power of down control channel.

Preferably, while determining the open loop transmitted power of down control channel according to the power of semi-continuous scheduling HS-PDSCH channel and CQI information, by following formula, determine:

Wherein:

P _hS-PDSCHfor the total transmitted power of HS-PDSCH;

N _hS-PDSCHfor HS-PDSCH code channel number;

λ _hS-PDSCHfor HS-PDSCH normalizes to the code check of 16QAM;

α _hS-PDSCHfor the modulation system of HS-PDSCH, adjust coefficient, QPSK, is 2 if, and 16QAM, is 1 if;

M _hS-PDSCHfor the modulation system of HS-PDSCH, QPSK is that 0,16QAM is 1;

P _{down control channel}for the total transmitted power of down control channel;

N _{down control channel}for down control channel code channel number;

λ _{down control channel}for down control channel normalizes to the code check of 16QAM;

α _{down control channel}for modulation system, adjust coefficient, QPSK, is 2 if, and 16QAM, is 1 if;

PC _stepfor power is adjusted step-length;

δ is the power headroom that different modulating mode is brought;

Δ is used for the variation of compensate for channel environment and the error that corrected power brings.

Preferably, in the normal consistency process of UE:

At the channel that need is carried out to power control according to the information on the non-DPCH of following, carry out power while controlling, according to path loss and ISCP, determine the open loop transmitted power of down control channel.

Preferably, the open loop transmitted power of determining down control channel according to path loss and ISCP, comprising:

The open loop transmitted power of down control channel is calculated as follows:

P _{down control channel}=PRX _{down control channel, des}+ L _pCCPCH, wherein, PRX _{down control channel, des}for expectation received power, L _pCCPCHfor path loss;

Described expectation received power upgrades by following formula according to ISCP:

PRX _{down control channel, des}=SNR _target+ ISCP+ Δ-10log (16/N _{down control channel}), wherein, the surplus that Δ is considered for offsetting shadow fading, ISCP upgrades according to the up-to-date advise fate of RNC, SNR _targetfor the demodulation threshold of down control channel, N _{down control channel}for down control channel code channel number.

Preferably, in the normal consistency process of UE:

At the channel that need is carried out to power control according to the information on the non-DPCH of following, carry out power while controlling, according to the smooth value of the power information of the preceding paragraph in the time on this down control channel, determine the open loop transmitted power of down control channel.

Preferably, according to the smooth value of the power information of the preceding paragraph in the time on this down control channel, determine the open loop transmitted power of down control channel, comprising:

The transmitted power of the down control channel sending for the n time is calculated by following formula:

* PC (the n-1)+p*PC (n) of PC (n)=(1-p), wherein, PC (n) is the transmitted power of the down control channel that sends for the n time, p is smoothing factor.

Preferably, down control channel is with one of lower channel or its combination: HS-SCCH, E-AGCH, E-HICH.

A kind of power control apparatus of down control channel is also provided in the embodiment of the present invention, has comprised:

Channel module, for when needs carry out power control to down control channel, determines the non-DPCH of following;

Power model, carries out power control for the channel that need is carried out to power control according to the information on the non-DPCH of following.

Preferably, channel module is further used for when UE accesses by DCH, determines that the non-DPCH of following is DCH channel;

Power model is further used for determining according to the transmitted power of DCH channel the transmitted power of down control channel.

Preferably, channel module is further used for when UE accesses by FACH, determines that the non-DPCH of following is FACH channel;

Power model is further used for determining according to the transmitted power of FACH channel the transmitted power of down control channel.

Preferably, power model is further used for when UE strengthens access by FACH, the transmitted power that the path loss of notifying according to RNC and up ISCP information are determined down control channel.

Preferably, power model comprises:

Path loss unit, for determine described path loss be RNC in base station for the first time by before public H-RNTI dispatch terminal, the path loss by FP frame to base station notification terminal;

ISCP unit, for determining that described ISCP is the ISCP information of E-PUCH time slot;

Power cell, for determining that the transmitted power of the down control channel of public H-RNTI is: PC=SNR _target+ ISCP+ Δ+L-10log (16/N _{down control channel}), wherein, the transmitted power that PC is down control channel, the surplus that Δ is considered for offsetting shadow fading, SIR _targetfor the demodulation threshold of down control channel, L is path loss information.

Preferably, channel module is further used in the normal consistency process of UE, determines that the non-DPCH of following is HS-PDSCH channel;

Power model is further used for carrying out power while controlling at the channel that need is carried out to power control according to the information on the non-DPCH of following, and determines the open loop transmitted power of down control channel according to the power of semi-continuous scheduling HS-PDSCH channel and CQI information.

Preferably, power model is further used for, when determining the open loop transmitted power of down control channel according to the power of semi-continuous scheduling HS-PDSCH channel and CQI information, by following formula, determining:

Wherein:

P _hS-PDSCHfor the total transmitted power of HS-PDSCH;

N _hS-PDSCHfor HS-PDSCH code channel number;

λ _hS-PDSCHfor HS-PDSCH normalizes to the code check of 16QAM;

α _hS-PDSCHfor the modulation system of HS-PDSCH, adjust coefficient, QPSK, is 2 if, and 16QAM, is 1 if;

M _hS-PDSCHfor the modulation system of HS-PDSCH, QPSK is that 0,16QAM is 1;

P _{down control channel}for the total transmitted power of down control channel;

N _{down control channel}for down control channel code channel number;

λ _{down control channel}for down control channel normalizes to the code check of 16QAM;

α _{down control channel}for modulation system, adjust coefficient, QPSK, is 2 if, and 16QAM, is 1 if;

PC _stepfor power is adjusted step-length;

δ is the power headroom that different modulating mode is brought;

Δ is used for the variation of compensate for channel environment and the error that corrected power brings.

Preferably, power model is further used in the normal consistency process of UE, determines the open loop transmitted power of down control channel according to path loss and ISCP.

Preferably, power model comprises:

Power cell, for being calculated as follows the open loop transmitted power of down control channel:

P _{down control channel}=PRX _{down control channel, des}+ L _pCCPCH, wherein, PRX _{down control channel, des}for expectation received power, L _pCCPCHfor path loss;

Expectation received power unit, for upgrading described expectation received power according to ISCP by following formula:

PRX _{down control channel, des}=SNR _target+ ISCP+ Δ-10log (16/N _{down control channel}), wherein, the surplus that Δ is considered for offsetting shadow fading, ISCP upgrades according to the up-to-date advise fate of RNC, SNR _targetfor the demodulation threshold of down control channel, N _{down control channel}for down control channel code channel number.

Preferably, power model is further used in the normal consistency process of UE, determines the open loop transmitted power of down control channel according to the smooth value of the power information of the preceding paragraph in the time on this down control channel.

Preferably, power model is further used for being calculated as follows the transmitted power of the down control channel sending for the n time:

* PC (the n-1)+p*PC (n) of PC (n)=(1-p), wherein, PC (n) is the transmitted power of the down control channel that sends for the n time, p is smoothing factor.

Preferably, power model is further used for comprising that the down control channel with one of lower channel or its combination carries out power control: HS-SCCH, E-AGCH, E-HICH.

Beneficial effect of the present invention is as follows:

In the technical scheme providing in the embodiment of the present invention, when needs carry out power control to down control channel, the channel that need is carried out to power control according to the information on the non-DPCH of following carries out power control.Owing to carrying out power control, no longer rely on and follow DPCH, therefore, by this programme, even removing follow channel in the situation that, also can guarantee the performance of down control channel, improve the capacity of system.

Accompanying drawing explanation

Fig. 1 is the Poewr control method implementing procedure schematic diagram of down control channel in the embodiment of the present invention;

Fig. 2 is the power control apparatus structural representation of down control channel in the embodiment of the present invention.

Embodiment

Inventor notices in invention process: along with the development of technology, increasing user can adopt HSPA technology, and in order to support more user, the development trend of technology is removed exactly and followed DPCH.For HSPA, along with the number of users of supporting increases, can be larger to user's scheduling interval, at this moment the power of control channel is controlled how to process needs to consider, guarantee the performance of control channel, could meet the requirement of system.Technical scheme provided by the invention, describes the specific embodiment of the present invention below in conjunction with accompanying drawing providing the technical scheme of solution for this problem.

Technical scheme provided by the invention has provided removes the scheme of after DPCH, down control channel being carried out to power control of following, at least be applicable to comprise with one of lower channel or its combination: HS-SCCH, E-AGCH, E-HICH (E-DCH HARQ Indicator Channel, E-DCH HARQ just answers indicating channel; HARQ:Hybrid Automatic Repeat Request, mixed automatic repeat request) down control channel.The HS-SCCH of will be mainly in implementation below take describes as example, and the enforcement of E-AGCH, E-HICH is with reference to HS-SCCH.

Fig. 1 is the Poewr control method implementing procedure schematic diagram of down control channel, as shown in the figure, can comprise the steps:

Step 101, at needs, down control channel is carried out to power while controlling, determine the non-DPCH of following;

Step 102, the channel that need is carried out to power control according to the information on the non-DPCH of following carry out power control.

Carry out concrete implementation below.

One, definite mode of the initial transmission power of down control channel after the initial access of user.

1,, when UE accesses by DCH, according to the transmitted power of DCH channel, determine the transmitted power of down control channel.

Concrete, if initial link setup or reshuffle and adopt DCH pattern, at wireless link or after having reshuffled, can be set up shared channel, then delete DCH channel, with shared channel, carry out the transmission of business; The HS-SCCH of initialization or the transmitted power of E-AGCH just can, with reference to the transmitted power of DCH, can increase certain power headroom in concrete enforcement according to actual needs like this.In enforcement, E-HICH can be with reference to the transmitted power of HS-SCCH/E-AGCH, and considers certain power headroom.

2,, when UE accesses by FACH, according to the transmitted power of FACH channel, determine the transmitted power of down control channel.

Concrete, if initial link setup or reshuffle and adopt FACH pattern, owing to not configuring DCH channel, adopts FACH and RACH (Random Access Channel, Random Access Channel) channel carries out wireless link or reshuffles, and following adopted shared channel carries out the transmission of business; The transmitted power of the HS-SCCH/E-AGCH of initialization can be with reference to the transmitted power of FACH like this.In enforcement, E-HICH can be with reference to the transmitted power of HS-SCCH/E-AGCH, and considers certain power headroom.

3,, when UE strengthens access by FACH, according to path loss and up ISCP (Interfere Signal Code Power, the Interference Signal Code Power) information of RNC notice, determine the transmitted power of down control channel.

In concrete enforcement, the transmitted power that the path loss of notifying according to RNC and up ISCP information are determined down control channel, can comprise:

Path loss is that RNC passes through public H-RNTI (HS-DSCH Radio NetworkIdentifier for the first time in base station, HS-DSCH wireless network identification) before dispatch terminal, path loss by FP (Frame Protocol, Frame Protocol) frame to base station notification terminal;

ISCP is the ISCP information of E-PUCH time slot;

The transmitted power that can determine the down control channel of public H-RNTI is: PC=SNR _target+ ISCP+ Δ+L-10log (16/N _{down control channel}), wherein, the transmitted power that PC is down control channel, the surplus that Δ is considered for offsetting shadow fading, SIR _targetdemodulation threshold for down control channel.

Concrete, if initial link setup or reshuffle and adopt CELL FACH enhancement mode, when user initially accesses, before public H-RNTI dispatch terminal is passed through for the first time in base station, RNC can pass through FP frame to the path loss of base station notification terminal, then the transmitted power of the HS-SCCH of public H-RNTI, in conjunction with the ISCP information of E-PUCH time slot, is determined in base station: PC=SNR Target+ISCP+ Δ+L-10log (16/N _{down control channel}), the surplus that wherein Δ is considered for offsetting shadow fading, SIR Target is HS-SCCH demodulation threshold.Then E-AGCH and E-HICH can be with reference to the transmitted powers of HS-SCCH, and consider certain power headroom.

Wherein, L is path loss information, for example, and 10log (16/N _{down control channel}) can be chosen for 9dB, in enforcement, 10log (16/N _{down control channel}) be a surplus, the power adjustment that object is brought in order to adjust different spread spectrum coefficients.

Two, in normal consistency process, definite mode of the open loop transmitted power of down control channel when scheduling interval is larger.

After user's access, if scheduling interval is larger, need again HS-SCCH, E-AGCH, E-HICH to be carried out to open loop power control, describe respectively below:

1,, in the normal consistency process of UE, according to the power of semi-continuous scheduling HS-PDSCH channel and CQI (Channel Quality Indicator, channel quality indication) information, determine the open loop transmitted power of down control channel.

In concrete enforcement, when determining the open loop transmitted power of down control channel according to the power of semi-continuous scheduling HS-PDSCH channel and CQI information, can determine by following formula:

Wherein:

P _hS-PDSCHfor the total transmitted power of HS-PDSCH;

N _hS-PDSCHfor HS-PDSCH code channel number;

λ _hS-PDSCHfor HS-PDSCH normalizes to the code check of 16QAM (Quadrature AmplitudeModulation, quadrature amplitude modulation);

α _hS-PDSCHfor the modulation system of HS-PDSCH, adjust coefficient, QPSK (QuadraturePhase Shift Keying, quarternary phase-shift keying (QPSK)), is 2 if, and 16QAM, is 1 if;

M _hS-PDSCHfor the modulation system of HS-PDSCH, QPSK is that 0,16QAM is 1;

P _{down control channel}for the total transmitted power of down control channel;

N _{down control channel}for down control channel code channel number;

λ _{down control channel}for down control channel normalizes to the code check of 16QAM;

α _{down control channel}for modulation system, adjust coefficient, QPSK, is 2 if, and 16QAM, is 1 if;

PC _stepfor power is adjusted step-length;

δ is the power headroom that different modulating mode is brought;

Δ is used for the variation of compensate for channel environment and the error that corrected power brings.

Concrete, for CPC, can configure semi-continuous scheduling pattern, at this moment the code check of HS-PDSCH is fixed, and it is the transmission of fixed cycle that power changes along with the variation of channel circumstance, and it is smaller to send interval.If so the HSDPA in current N subframe is semi-continuous scheduling mode, the transmitted power of HS-SCCH/E-AGCH/E-HICH can be adjusted according to semi-continuous scheduling HS-PDSCH power and CQI information.

That is, if there is semi-continuous scheduling HS-PDSCH, can convert out the power that HS-SCCH/E-AGCH/E-HICH needs according to formula below, take HS-SCCH as example as:

$P_{\mathrm{HS}-\mathrm{SCCH}}=P_{\mathrm{HS}-\mathrm{PDSCH}}+10\log \frac{N_{\mathrm{HS}-\mathrm{SCCH}}}{N_{\mathrm{HS}-\mathrm{PDSCH}}}+({\mathrm{\λ}}_{\mathrm{HS}-\mathrm{SCCH}}*{\mathrm{\α}}_{\mathrm{HS}-\mathrm{SCCH}}-{\mathrm{\λ}}_{\mathrm{HS}-\mathrm{PDSCH}}*{\mathrm{\α}}_{\mathrm{HS}-\mathrm{PDSCH}})*{\mathrm{PC}}_{\mathrm{step}}$

$-M_{\mathrm{HS}-\mathrm{PDSCH}}*\mathrm{\δ}+\mathrm{\Δ}$

Wherein:

P _hS-PDSCHfor the total transmitted power of HS-PDSCH;

N _hS-PDSCHfor HS-PDSCH code channel number;

λ _hS-PDSCHfor HS-PDSCH normalizes to the code check of 16QAM;

α _hS-PDSCHfor the modulation system of HS-PDSCH, adjust coefficient, QPSK, is 2 if, and 16QAM, is 1 if;

M _hS-PDSCHfor the modulation system of HS-PDSCH, QPSK is that 0,16QAM is 1;

P _hS-SCCHfor the total transmitted power of HS-SCCH;

N _hS-SCCHfor HS-SCCH code channel number;

λ _hS-SCCHfor HS-SCCH normalizes to the code check of 16QAM;

α _hS-SCCHfor modulation system, adjust coefficient, QPSK, is 2 if, and 16QAM, is 1 if;

PC _stepfor power is adjusted step-length;

δ is the power headroom that different modulating mode is brought;

Δ is used for the variation of compensate for channel environment and the error that corrected power brings.

In force, E-AGCH/E-HICH channel is also consistent with HS-SCCH according to the mode of semi-continuous scheduling HS-PDSCH corrected power.

2,, in the normal consistency process of UE, according to path loss and ISCP, determine the open loop transmitted power of down control channel.

In concrete enforcement, the open loop transmitted power of determining down control channel according to path loss and ISCP, can comprise:

The open loop transmitted power of down control channel is calculated as follows:

P _{down control channel}=PRX _{down control channel, des}+ L _pCCPCH, wherein, PRX _{down control channel, des}for expectation received power, L _pCCPCHfor path loss;

Described expectation received power upgrades by following formula according to ISCP:

PRX _{down control channel, des}=SNR _target+ ISCP+ Δ-10log (16/N _{down control channel}), wherein, the surplus that Δ is considered for offsetting shadow fading, ISCP upgrades according to the up-to-date advise fate of RNC, SNR _targetfor the demodulation threshold of down control channel, N _{down control channel}for down control channel code channel number.

Concrete, if there is no semi-continuous scheduling HSDPA, can calculate open loop power according to path loss and ISCP.

In standard, there is RNC (Radio Network Controller, radio network controller) give NBAP (NodeB Application Part, Node B applying portion) path loss and the ISCP information of notifying each user to measure, originally DPCH is followed in HSPA configuration, can be directly with reference to down control channel (comprising HS-SCCH/E-AGCH/E-HICH), can be directly with reference to the transmitted power of following DPCH when scheduling interval is larger.But after following DPCH to cancel, can consider the open loop power with reference to path loss and ISCP calculating down control channel.

Take HS-SCCH as example, if after having considered path loss and ISCP, the open loop power of HS-SCCH can be P _hS-SCCH=PRX _{hS-SCCH, des}+ L _pCCPCH, PRX wherein _{hS-SCCH, des}for expectation received power, L _pCCPCHfor path loss.Expectation received power upgrades according to ISCP, PRX _{hS-SCCH, des}=SNR _target+ ISCP+ Δ-10log (16/N _hS-SCCH), the surplus that wherein Δ is considered for offsetting shadow fading; ISCP upgrades according to the up-to-date advise fate of RNC; SNR _targetdemodulation threshold for HS-SCCH; N _hS-SCCHfor HS-SCCH code channel number.

In concrete enforcement, RNC during to NodeB notice path loss and ISCP information, can adopt Event triggered mode, if path loss or ISCP variable quantity surpass certain thresholding, triggers this IE.Concrete trigger gate limit value can obtain by simulating, verifying or actual test.

3,, in the normal consistency process of UE, according to the smooth value of the power information of the preceding paragraph in the time on this down control channel, determine the open loop transmitted power of down control channel.

In concrete enforcement, according to the smooth value of the power information of the preceding paragraph in the time on this down control channel, determine the open loop transmitted power of down control channel, can comprise:

The transmitted power of the down control channel sending for the n time is calculated by following formula:

* PC (the n-1)+p*PC (n) of PC (n)=(1-p), wherein, PC (n) is the transmitted power of the down control channel that sends for the n time, p is smoothing factor.

Concrete, when not there is not semi-continuous scheduling HSDPA, also can be according to control channel self power information in for the previous period smoothly obtain the open loop power of current down control channel.

Take HS-SCCH as example, upgrade * PC (the n-1)+p*PC (n) of recursive average PC (n)=(1-p) at every turn when HS-SCCH is launched in base station, wherein PC (n) is the transmitted power of the HS-SCCH that sends for the n time, and p is smoothing factor; In enforcement, according to different scheduling intervals, smoothing factor can also be revised, and revised value can progressively increase along with the increase of scheduling interval.

Based on same inventive concept, a kind of power control apparatus of down control channel is also provided in the embodiment of the present invention, because the principle that this equipment is dealt with problems is similar to the Poewr control method of long a kind of down control channel, therefore the enforcement of this equipment can, referring to the enforcement of method, repeat part and repeat no more.

Fig. 2 is the power control apparatus structural representation of down control channel, as shown in the figure, in equipment, can comprise:

Channel module 201, for when needs carry out power control to down control channel, determines the non-DPCH of following;

Power model 202, carries out power control for the channel that need is carried out to power control according to the information on the non-DPCH of following.

Below to carrying out concrete implementation.

One, definite mode of the initial transmission power of down control channel after the initial access of user.

1, in implementing, channel module can be further used for when UE accesses by DCH, determines that the non-DPCH of following is DCH channel;

Power model can be further used for determining according to the transmitted power of DCH channel the transmitted power of down control channel.

2, in implementing, channel module can be further used for when UE accesses by FACH, determines that the non-DPCH of following is FACH channel;

Power model can be further used for determining according to the transmitted power of FACH channel the transmitted power of down control channel.

3,, in implementing, power model can be further used for when UE strengthens access by FACH, the transmitted power that the path loss of notifying according to RNC and up ISCP information are determined down control channel.

In concrete enforcement, power model can comprise:

Path loss unit, for determine described path loss be RNC in base station for the first time by before public H-RNTI dispatch terminal, the path loss by FP frame to base station notification terminal;

ISCP unit, for determining that described ISCP is the ISCP information of E-PUCH time slot;

Power cell, for determining that the transmitted power of the down control channel of public H-RNTI is: PC=SNR _target+ ISCP+ Δ+L-10log (16/N _{down control channel}), wherein, the transmitted power that PC is down control channel, the surplus that Δ is considered for offsetting shadow fading, SIR _targetfor the demodulation threshold of down control channel, L is path loss information.

Two, in normal consistency process, definite mode of the open loop transmitted power of down control channel when scheduling interval is larger.

After user's access, if scheduling interval is larger, need again HS-SCCH, E-AGCH, E-HICH to be carried out to open loop power control, describe respectively below:

1, in implementing, channel module can be further used in the normal consistency process of UE, determines that the non-DPCH of following is HS-PDSCH channel;

Power model can be further used for carrying out power while controlling at the channel that need is carried out to power control according to the information on the non-DPCH of following, and determines the open loop transmitted power of down control channel according to the power of semi-continuous scheduling HS-PDSCH channel and CQI information.

In concrete enforcement, power model can also be further used for when determining the open loop transmitted power of down control channel according to the power of semi-continuous scheduling HS-PDSCH channel and CQI information, definite by following formula:

Wherein:

P _hS-PDSCHfor the total transmitted power of HS-PDSCH;

N _hS-PDSCHfor HS-PDSCH code channel number;

λ _hS-PDSCHfor HS-PDSCH normalizes to the code check of 16QAM;

α _hS-PDSCHfor the modulation system of HS-PDSCH, adjust coefficient, QPSK, is 2 if, and 16QAM, is 1 if;

M _hS-PDSCHfor the modulation system of HS-PDSCH, QPSK is that 0,16QAM is 1;

P _{down control channel}for the total transmitted power of down control channel;

N _{down control channel}for down control channel code channel number;

λ _{down control channel}for down control channel normalizes to the code check of 16QAM;

α _{down control channel}for modulation system, adjust coefficient, QPSK, is 2 if, and 16QAM, is 1 if;

PC _stepfor power is adjusted step-length;

δ is the power headroom that different modulating mode is brought;

Δ is used for the variation of compensate for channel environment and the error that corrected power brings.

2, in implementing, power model can be further used in the normal consistency process of UE, determines the open loop transmitted power of down control channel according to path loss and ISCP.

In concrete enforcement, power model can comprise:

Power cell, for being calculated as follows the open loop transmitted power of down control channel:

P _{down control channel}=PRX _{down control channel, des}+ L _pCCPCH, wherein, PRX _{down control channel, des}for expectation received power, L _pCCPCHfor path loss;

Expectation received power unit, for upgrading described expectation received power according to ISCP by following formula:

PRX _{down control channel, des}=SNR _target+ ISCP+ Δ-10log (16/N _{down control channel}), wherein, the surplus that Δ is considered for offsetting shadow fading, ISCP upgrades according to the up-to-date advise fate of RNC, SNR _targetfor the demodulation threshold of down control channel, N _{down control channel}for down control channel code channel number.

3, in implementing, power model can be further used in the normal consistency process of UE, determines the open loop transmitted power of down control channel according to the smooth value of the power information of the preceding paragraph in the time on this down control channel.

In concrete enforcement, power model can also be further used for being calculated as follows the transmitted power of the down control channel sending for the n time:

* PC (the n-1)+p*PC (n) of PC (n)=(1-p), wherein, PC (n) is the transmitted power of the down control channel that sends for the n time, p is smoothing factor.

In above-mentioned apparatus embodiments, power model can also be further used for comprising that the down control channel with one of lower channel or its combination carries out power control: HS-SCCH, E-AGCH, E-HICH.

For convenience of description, the each several part of the above device is divided into various modules with function or unit is described respectively.Certainly, when enforcement is of the present invention, the function of each module or unit can be realized in same or a plurality of software or hardware.

As seen from the above-described embodiment, in the embodiment of the present invention, provide and removed the power control solution of following after channel.

Definite scheme of the initial transmission power of the rear down control channel of the initial access of user further, has been proposed.

Further, if proposed user, by DCH, access the scheme that the power information of the down control channel power reference DCH channel sending first obtains.

Further, if proposed user, by FACH, access the scheme that the power information of the down control channel power reference FACH channel sending first obtains.

Further, if proposed user, by FACH, strengthen access, the scheme that the power information of the down control channel power reference DCH channel sending first obtains.

Further, if proposed user, by DCH, access the path loss of the down control channel power reference RNC notice sending first and the scheme of up ISCP information acquisition.

Definite scheme of the open loop transmitted power of down control channel when scheduling interval is larger further, has also been proposed in normal consistency process.

Further, proposed in normal consistency process, when scheduling interval is larger, down control channel obtains the scheme of open loop transmitted power with reference to semi-continuous scheduling HS-PDSCH.

Further, proposed in normal consistency process, when scheduling interval is larger, down control channel obtains the scheme of open loop transmitted power with reference to path loss and ISCP.

Further, proposed in normal consistency process, when scheduling interval is larger, the smooth value of down control channel reference channel self front end time transmitted power obtains the scheme of open loop transmitted power.

Visible, by the technical scheme proposing in the embodiment of the present invention, even also can guarantee the performance of down control channel removing follow channel in the situation that, thereby improved the capacity of system.

Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt complete hardware implementation example, implement software example or in conjunction with the form of the embodiment of software and hardware aspect completely.And the present invention can adopt the form that wherein includes the upper computer program of implementing of computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) of computer usable program code one or more.

The present invention is with reference to describing according to flow chart and/or the block diagram of the method for the embodiment of the present invention, equipment (system) and computer program.Should understand can be in computer program instructions realization flow figure and/or block diagram each flow process and/or the flow process in square frame and flow chart and/or block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, the instruction of carrying out by the processor of computer or other programmable data processing device is produced for realizing the device in the function of flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame appointments.

These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, the instruction that makes to be stored in this computer-readable memory produces the manufacture that comprises command device, and this command device is realized the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.

These computer program instructions also can be loaded in computer or other programmable data processing device, make to carry out sequence of operations step to produce computer implemented processing on computer or other programmable devices, thereby the instruction of carrying out is provided for realizing the step of the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame on computer or other programmable devices.

Although described the preferred embodiments of the present invention, once those skilled in the art obtain the basic creative concept of cicada, can make other change and modification to these embodiment.So claims are intended to all changes and the modification that are interpreted as comprising preferred embodiment and fall into the scope of the invention.

Claims (18)

1. a Poewr control method for down control channel, is characterized in that, comprises the steps:

When needs carry out power control to down control channel, determine non-following special physical channel DPCH;

The channel that need is carried out to power control according to the information on the non-DPCH of following carries out power control;

Wherein, at UE, by FACH, strengthen when access: at the channel that need is carried out to power control according to the information on the non-DPCH of following, carry out power while controlling, the transmitted power of determining down control channel according to the path loss of radio network controller (RNC) notice and uplink interference signal code power ISCP information; Wherein, described path loss is RNC in base station for the first time by before public H-RNTI dispatch terminal, the path loss by FP frame to base station notification terminal; Described ISCP is the ISCP information of E-PUCH time slot; The transmitted power of determining the down control channel of public H-RNTI is: PC=SNR _target+ ISCP+ Δ+L-10log (16/N _{down control channel}), wherein, the transmitted power that PC is down control channel, the surplus that Δ is considered for offsetting shadow fading, SIR _targetfor the demodulation threshold of down control channel, L is path loss information, N _{down control channel}for down control channel code channel number.

2. the method for claim 1, is characterized in that, when user equipment (UE) accesses by dedicated channel DCH:

The non-DPCH of following is DCH channel;

At the channel that need is carried out to power control according to the information on the non-DPCH of following, carry out power while controlling, according to the transmitted power of DCH channel, determine the transmitted power of down control channel.

3. the method for claim 1, is characterized in that, when UE accesses by forward access channel FACH:

The non-DPCH of following is FACH channel;

At the channel that need is carried out to power control according to the information on the non-DPCH of following, carry out power while controlling, according to the transmitted power of FACH channel, determine the transmitted power of down control channel.

4. the method for claim 1, is characterized in that, in the normal consistency process of UE:

The non-DPCH of following is HS-PDSCH channel;

At the channel that need is carried out to power control according to the information on the non-DPCH of following, carry out power while controlling, the open loop transmitted power of determining down control channel according to the power of semi-continuous scheduling high speed down sharing physical channel HS-PDSCH channel and channel quality indicator CQI information.

5. method as claimed in claim 4, is characterized in that, while determining the open loop transmitted power of down control channel according to the power of semi-continuous scheduling HS-PDSCH channel and CQI information, by following formula, determines:

Wherein:

P _hS-PDSCHfor the total transmitted power of HS-PDSCH;

N _hS-PDSCHfor HS-PDSCH code channel number;

λ _hS-PDSCHfor HS-PDSCH normalizes to the code check of 16 quadrature amplitude modulation QAM;

α _hS-PDSCHfor the modulation system of HS-PDSCH, adjust coefficient, quarternary phase-shift keying (QPSK) QPSK, is 2 if, and 16QAM, is 1 if;

M _hS-PDSCHfor the modulation system of HS-PDSCH, QPSK is that 0,16QAM is 1;

P _{down control channel}for the total transmitted power of down control channel;

N _{down control channel}for down control channel code channel number;

λ _{down control channel}for down control channel normalizes to the code check of 16QAM;

α _{down control channel}for the modulation system of down control channel, adjust coefficient, QPSK, is 2 if, and 16QAM, is 1 if;

PC _stepfor power is adjusted step-length;

δ is the power headroom that different modulating mode is brought;

Δ is used for the variation of compensate for channel environment and the error that corrected power brings.

6. the method for claim 1, is characterized in that, in the normal consistency process of UE:

At the channel that need is carried out to power control according to the information on the non-DPCH of following, carry out power while controlling, according to path loss and ISCP, determine the open loop transmitted power of down control channel.

7. method as claimed in claim 6, is characterized in that, the open loop transmitted power of determining down control channel according to path loss and ISCP, comprising:

The open loop transmitted power of down control channel is calculated as follows:

P _{down control channel}=PRX _{down control channel, des}+ L _pCCPCH, wherein, PRX _{down control channel, des}for expectation received power, L _pCCPCHfor path loss;

Described expectation received power upgrades by following formula according to ISCP:

PRX _{down control channel, des}=SNR _target+ ISCP+ Δ-10log (16/N _{down control channel}), wherein, the surplus that Δ is considered for offsetting shadow fading, ISCP upgrades according to the up-to-date advise fate of RNC, SNR _targetfor the demodulation threshold of down control channel, N _{down control channel}for down control channel code channel number.

8. the method for claim 1, is characterized in that, in the normal consistency process of UE:

At the channel that need is carried out to power control according to the information on the non-DPCH of following, carry out power while controlling, according to the smooth value of the power information of the preceding paragraph in the time on this down control channel, determine the open loop transmitted power of down control channel.

9. the method as described in as arbitrary in claim 1 to 8, it is characterized in that, down control channel is with one of lower channel or its combination: high-speed shared control channel HS-SCCH, enhanced dedicated E-DCH absolute grant channel E-AGCH, E-DCH mixed automatic repeat request HARQ just answer indicating channel E-HICH.

10. a power control apparatus for down control channel, is characterized in that, comprising:

Channel module, for when needs carry out power control to down control channel, determines the non-DPCH of following;

Power model, carries out power control for the channel that need is carried out to power control according to the information on the non-DPCH of following;

Wherein, power model is further used for when UE strengthens access by FACH, the transmitted power that the path loss of notifying according to RNC and up ISCP information are determined down control channel; Wherein, power model comprises: path loss unit, for determine described path loss be RNC in base station for the first time by before public H-RNTI dispatch terminal, the path loss by FP frame to base station notification terminal; ISCP unit, for determining that described ISCP is the ISCP information of E-PUCH time slot; Power cell, for determining that the transmitted power of the down control channel of public H-RNTI is: PC=SNR _taget+ ISCP+ Δ+L-10log (16/N _{down control channel}), wherein, the transmitted power that PC is down control channel, the surplus that Δ is considered for offsetting shadow fading, SIR _targetthe demodulation threshold of down control channel, L is path loss information, N _{down control channel}for down control channel code channel number.

11. equipment as claimed in claim 10, is characterized in that,

Channel module is further used for when UE accesses by DCH, determines that the non-DPCH of following is DCH channel;

Power model is further used for determining according to the transmitted power of DCH channel the transmitted power of down control channel.

12. equipment as claimed in claim 10, is characterized in that,

Channel module is further used for when UE accesses by FACH, determines that the non-DPCH of following is FACH channel;

Power model is further used for determining according to the transmitted power of FACH channel the transmitted power of down control channel.

13. equipment as claimed in claim 10, is characterized in that, channel module is further used in the normal consistency process of UE, determine that the non-DPCH of following is HS-PDSCH channel;

Power model is further used for carrying out power while controlling at the channel that need is carried out to power control according to the information on the non-DPCH of following, and determines the open loop transmitted power of down control channel according to the power of semi-continuous scheduling HS-PDSCH channel and CQI information.

14. equipment as claimed in claim 13, is characterized in that, power model is further used for, when determining the open loop transmitted power of down control channel according to the power of semi-continuous scheduling HS-PDSCH channel and CQI information, by following formula, determining:

Wherein:

P _hS-PDSCHfor the total transmitted power of HS-PDSCH;

N _hS-PDSCHfor HS-PDSCH code channel number;

λ _hS-PDSCHfor HS-PDSCH normalizes to the code check of 16QAM;

α _sHS-PDSCHfor the modulation system of HS-PDSCH, adjust coefficient, QPSK, is 2 if, and 16QAM, is 1 if;

M _hS-PDSCHfor the modulation system of HS-PDSCH, QPSK is that 0,16QAM is 1;

P _{down control channel}for the total transmitted power of down control channel;

N _{down control channel}for down control channel code channel number;

λ _{down control channel}for down control channel normalizes to the code check of 16QAM;

α _{down control channel}for modulation system, adjust coefficient, QPSK, is 2 if, and 16QAM, is 1 if;

PC _stepfor power is adjusted step-length;

δ is the power headroom that different modulating mode is brought;

Δ is used for the variation of compensate for channel environment and the error that corrected power brings.

15. equipment as claimed in claim 10, is characterized in that, power model is further used in the normal consistency process of UE, determine the open loop transmitted power of down control channel according to path loss and ISCP.

16. equipment as claimed in claim 15, is characterized in that, power model comprises:

Power cell, for being calculated as follows the open loop transmitted power of down control channel:

P _{down control channel}=PPX _{down control channel, des}+ L _pCCPCH, wherein, PRX _{down control channel, des}for expectation received power, L _pCCPCHfor path loss;

Expectation received power unit, for upgrading described expectation received power according to ISCP by following formula:

PRX _{down control channel, des}=SNR _target+ ISCP+ Δ one 10log (16/N _{down control channel}), wherein, the surplus that Δ is considered for offsetting shadow fading, ISCP upgrades according to the up-to-date advise fate of RNC, SNR _targetfor the demodulation threshold of down control channel, N _{down control channel}for down control channel code channel number.

17. equipment as claimed in claim 10, is characterized in that, power model is further used in the normal consistency process of UE, determine the open loop transmitted power of down control channel according to the smooth value of the power information of the preceding paragraph in the time on this down control channel.

18. equipment as described in as arbitrary in claim 10 to 17, is characterized in that, power model is further used for comprising that the down control channel with one of lower channel or its combination carries out power control: HS-SCCH, E-AGCH, E-HICH.

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