CN102395187A - Power configuration method for physical mixing retransmission indicating channel - Google Patents

Abstract

The invention provides a power configuration method for a physical mixing retransmission indicating channel. The power of a PHICH (Physical Hybrid-ARQ Indicator Channel) is regulated according to the verification result of CRC (Cyclic Redundancy Check) results of PUSCH (Physical Uplink Shared Channel) data transmission, a signal-to-noise ratio corresponding to the latest feed backed channel quality information (CQI) and based on cell special reference signal (CRS) measurement, a preset target signal-to-noise ratio during transmitting ACK information in the PHICH, as well as the energy value of each source element of the CRS, so that the power configuration of the present PHICH can be consonant with the quality of the PHICH, the dynamic configuration of the PHICH can be effectively realized, and the use of the PHICH power source is optimized.

Description

The power distribution method of physical mixing retransmission indicating chanel

Technical field

The present invention relates to the resource distribution technology in the mobile communication, particularly relate to the power distribution method of a kind of physical mixing retransmission indicating chanel (PHICH).

Background technology

In the LTE system, when carrying out Physical Uplink Shared Channel (PUSCH) transmission, need ACK/NACK information through PHICH indication PUSCH transmission.Present PHICH transmission course mainly may further comprise the steps: at first, the information on base station (eNB) decoding PUSCH generates ACK or nack message according to the CRC check result; Then, eNB calculates ACK/NACK transmission shared PHICH group position and the interior sequence location of group according to the resource location of PUSCH; At last, a plurality of PHICH sequences in the group are carried out code division multiplexing (CDM), send PHICH.

Can find out from said process, on PHICH, adopt multi-user CDM form, adopt sequence spread spectrum to transmit, not have Cyclic Redundancy Check for ACK/NACK.

Because PHICH does not have CRC check, and the closed power controlling mechanism that does not adopt UE to send TPC adjustment PHICH power, so the transmission quality of PHICH needs eNB oneself to be provided with.In the system,, according to the constant power setting, dynamically do not adjust usually at present for the power setting of PHICH.The power setting that like this, will have a PHICH is problem improperly.This not only influences the PHICH transmission, and further influences the transmission of PUSCH; Accordingly; Because physical downlink control channel PDCCH and the configurable descending gross power of other down channel shared systems; Therefore also will influence the especially power division of PDCCH of descending other channel, further have influence on the scheduled transmission of Physical Downlink Shared Channel (PDSCH) or PUSCH.

Summary of the invention

In view of this, main purpose of the present invention is to provide a kind of power distribution method of physical mixing retransmission indicating chanel, and this method can realize the dynamic-configuration of PHICH power, optimizes the utilization of PHICH power resource.

In order to achieve the above object, the technical scheme of the present invention's proposition is:

The power distribution method of a kind of physical mixing retransmission indicating chanel PHICH is characterized in that, this method may further comprise the steps:

A, when at moment i, base station eNode B receives user equipment (UE) _mThe PUSCH data of the automatic repeat requests HARQ process of mixing n the time, according to the CRC check result who obtains after said PUSCH data are deciphered, confirm the ACK/NACK information HI (i) of corresponding needs feedback;

B, said base station are according to said HI (i), said UE _mTarget signal to noise ratio when the signal to noise ratio that the channel quality information CQI of the last feedback is corresponding, preset transferring ACK information on PHICH based on cell special reference CRS measurement; And the energy value of each resource element of CRS, to the last time will be to said UE _mThe ACK/NACK information of sending is carried out power control.

In sum; The physical mixed that the present invention proposes and the power distribution method of retransmission indicating chanel; The energy value of the target signal to noise ratio during according to the corresponding signal to noise ratio of measuring based on cell special reference CRS of the channel quality information CQI of the CRC check result of this PUSCH transfer of data, the last feedback, preset transferring ACK information on PHICH and each resource element of CRS is adjusted the power of PHICH channel; The power configuration of current PHICH channel is consistent with the PHICH quality of channel; Can effectively realize the dynamic-configuration of PHICH channel, optimize the utilization of PHICH power resource.

Description of drawings

Fig. 1 is the schematic flow sheet of the embodiment of the invention one.

Embodiment

For making the object of the invention, technical scheme and advantage clearer, the present invention is done to describe in detail further below in conjunction with accompanying drawing and specific embodiment.

Core concept of the present invention is: consider that because the protection of PHICH is very strong can think that it is errorless transmission, promptly the ACK/NACK transmission of Information is errorless; The adjustment of the power gain factors of the PHICH of transmission ACK/NACK information like this; Only need variation according to channel quality; The variation of adaptive channel gets final product; The energy value of the target signal to noise ratio during promptly according to the corresponding signal to noise ratio of measuring based on cell special reference CRS of the channel quality information CQI of the CRC check result of this PUSCH transfer of data, the last feedback, preset transferring ACK information on PHICH and each resource element of CRS is adjusted the power of PHICH channel; So that the power configuration of current PHICH channel is consistent with the PHICH quality of channel, thereby can realize the dynamic-configuration of PHICH channel.

Fig. 1 is the schematic flow sheet of the embodiment of the invention one.As shown in Figure 1, embodiment one mainly may further comprise the steps:

Step 101, when at moment i, base station eNode B receives user equipment (UE) _mThe Physical Uplink Shared Channel PUSCH data of the automatic repeat requests HARQ process of mixing n the time, according to the cyclic check code CRC check result who obtains after said PUSCH data are deciphered, confirm the ACK/NACK information HI (i) of corresponding needs feedback.

Here; Utilize the CRC check result, obtain HI (i), utilize this HI (i); The power gain factors that can come power gain factors to the PHICH channel promptly to send ACK/NACK information according to the variation of channel quality is dynamically adjusted, so that it is fit to current channel conditions.

Particularly, definite method of HI described in this step (i) is: if said CRC check result is 0, then HI (i) is ACK; Otherwise, HI (i)=NACK.

Step 102, said base station are according to said HI (i), said UE _mTarget signal to noise ratio when the signal to noise ratio that the channel quality information CQI of the last feedback is corresponding, preset transferring ACK information on PHICH based on cell special reference CRS measurement; And the energy value of each resource element of CRS, to the last time will be to said UE _mThe ACK/NACK information of sending is carried out power control.

This step is according to said HI (i), said UE _mTarget signal to noise ratio when the signal to noise ratio that the channel quality information CQI of the last feedback is corresponding, preset transferring ACK information on PHICH based on cell special reference CRS measurement; And the energy value of each resource element of CRS carries out power control; Can dynamically adjust the power gain factors that sends ACK/NACK information, so that it is fit to current channel conditions.

Preferably, this step can realize through following step:

Step 1021, said base station according to

Calculate said UE _mCurrent power gain factors g _{M, j}, wherein, SINR _BaseFor according to UE _mThe signal to noise ratio dB value that the channel quality information CQI of the last feedback calculates based on cell special reference (CRS) measurement, SINR _{Target, ack}Target signal to noise ratio dB value during for transferring ACK information on PHICH; P _RSBe the energy value EPRE of each resource element of CRS, unit is dBm.

Step 1022, when said HI (j) is ACK, with said UE _mCurrent power gain factors g _{M, j}, as the last time will be to UE _mThe power gain factors g that is adopted when sending ACK/NACK information _{M, an}

When said HI (j) is NACK, with said UE _mCurrent power gain factors g _{M, j}With preset NACK gain adjustment factor Δ _{NACK_ACK_linear}Product, as the last time will be to UE _mThe power gain factors g that is adopted when sending ACK/NACK information _{M, an}

Preferably, can be in advance in practical application according to following three kinds of methods to UE _mPower gain factors initial value g _{M, ini}Be provided with:

Method one: in advance according to

Confirm said UE _mPower gain factors initial value g _{M, ini}, wherein, SINR _BaseFor according to UE _mThe signal to noise ratio dB value that the channel quality information CQI of the last feedback calculates based on cell special reference CRS measurement, SINR _{Target, ack}Target signal to noise ratio dB value during for transferring ACK information on PHICH; P _RSBe the energy value EPRE of each resource element of CRS, unit is dBm.

Method two: in advance according to $g_{m,\mathrm{Ini}}=\sqrt{\frac{{10}^{\frac{P_{\mathrm{Max}}^{\left(p\right)}}{10}}-N_{\mathrm{RS}}^{\mathrm{RE}}\·{10}^{\frac{P_{\mathrm{RS}}}{10}}}{N_{\mathrm{NonRS}}^{\mathrm{RE}}}},$ Confirm said UE _mPower gain factors initial value g _{M, ini}, wherein,

For being the maximum transmission power of antenna port p, unit is dBm;

Be the resource element number of non-reference signal in whole bandwidth of sub-district, Be the resource element number of cell special reference in whole bandwidth of sub-district, P _RSFor the energy value of each resource element of CRS (Energy Per Resource Element, EPRE), unit is dBm, this value be the parameter of cell-level, in system broadcasts, can notify at present.

Method three: in advance according to

Confirm said UE _mPower gain factors initial value g _{M, ini}, wherein, SINR _RefBe the target signal to noise ratio dB value of preset sub-district, SINR _{Target, ack}During for transferring ACK information on PHICH target signal to noise ratio dB value; P _RSEnergy value EPRE for each resource element of CRS.

Further, consider, then when carrying out power configuration, need consider the constraint of this thresholding, after the promptly said step 1022, can further include following step if be provided with ACK/NACK maximum power thresholding in the system, to satisfy system requirements:

Determined said g in the determining step 1022 _{M, an}Whether greater than

P _{HI, HL}Be preset ACK/NACK maximum power thresholding, if then will

As the last time will be to UE _mThe power gain factors g that is adopted when sending ACK/NACK information _{M, an}Otherwise, judge g _{M, an}Whether less than

Be preset ACK/NACK minimum power thresholding, if then will

As the last time will be to UE _mThe power gain factors g that is adopted when sending ACK/NACK information _{M, an}

Further; After obtaining the HI power gain factors of each UE, a plurality of UE for CDM is positioned at same PHICH level can further calculate corresponding PHICH group power; If there is Power Limitation in system to PHICH; Can also comprise the steps after the then said step 102, to satisfy system requirements: for each PHICH group, according to preset PHICH power pond size

With said g _{M, an}, dispose the PHICH transmitting power that this PHICH organizes interior each subscriber equipment.Wherein, layoutprocedure comprises the steps: particularly

C1, with the power gain factors g of each subscriber equipment in current this PHICH group that obtains _{M, an}Corresponding performance number g ² _{M, an}Add up, obtain

If c2

Execution in step d3 then, otherwise execution in step d6, wherein, when adopting the regular circulation prefix,

m _iBe the PHICH set of calculated corrected parameter of confirming according to TDD ascending-descending subframes configuration,

For the PHICH group number that calculates according to broadcast, when adopting extended cyclic prefix, $P_{\mathrm{RE},\mathrm{Max}}^{\left(p\right)}=\frac{P_{\mathrm{PHICH},\mathrm{Max}}^{\left(p\right)}}{6\·m_i\·N_{\mathrm{PHICH}}^{\mathrm{Group}}};$

C3, in this PHICH group Equaled P _{HI, LL}Subscriber equipment, be labeled as

And calculate in current this PHICH group and own Sum obtains

C4, in this PHICH group

Be not equal to P _{HI, LL}Subscriber equipment, according to $g_{m,\mathrm{An}}^2=g_{m,\mathrm{An}}^2\·\frac{P_{\mathrm{RE},\mathrm{Max}}^{\left(p\right)}-\underset{\mathrm{Intra}-\mathrm{Group}}{\mathrm{\Σ}}{g}_{m,\mathrm{An},\mathrm{Min}}^2}{P_{\mathrm{RE},\mathrm{Group}}^{\left(p\right)}-\underset{\mathrm{Intra}-\mathrm{Group}}{\mathrm{\Σ}}{g}_{m,\mathrm{An},\mathrm{Min}}^2},$ Right

Upgrade;

After c5, judgement are upgraded each

Whether less than P _{HI, LL}, if having

Less than P _{HI, LL}Then should

Be configured to P _{HI, LL}, execution in step c1;

C6, finish said configuration.

In practical application, when PHICH did not have max power constraint, the power setting of its PHICH group was fairly simple, and only need add up to the HI power in the same PHICH group gets final product, promptly $P_{\mathrm{RE},\mathrm{Group}}^{\left(p\right)}=\underset{\mathrm{Intra}-\mathrm{Group}}{\mathrm{\Σ}}{g}_{m,\mathrm{An}}^2.$

In sum, more than being merely preferred embodiment of the present invention, is not to be used to limit protection scope of the present invention.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (8)

1. the power distribution method of a physical mixing retransmission indicating chanel PHICH is characterized in that, this method may further comprise the steps:

A, when at moment i, base station eNode B receives user equipment (UE) _mThe Physical Uplink Shared Channel PUSCH data of the automatic repeat requests HARQ process of mixing n the time, according to the cyclic check code CRC check result who obtains after said PUSCH data are deciphered, confirm the ACK/NACK information HI (i) of corresponding needs feedback;

B, said base station are according to said HI (i), said UE _mTarget signal to noise ratio when the signal to noise ratio that the channel quality information CQI of the last feedback is corresponding, preset transferring ACK information on PHICH based on cell special reference CRS measurement; And the energy value of each resource element of CRS, to the last time will be to said UE _mThe ACK/NACK information of sending is carried out power control.

2. according to the described method of claim l, it is characterized in that HI described in the step a (i) confirms as:

If said CRC check result is 0, then HI (i) is ACK; Otherwise, HI (i)=NACK.

3. method according to claim 1 is characterized in that, said step b comprises:

B1, said base station according to

Calculate said UE _mCurrent power gain factors g _{M, j}, wherein, SINR _BaseFor according to UE _mThe signal to noise ratio dB value that the channel quality information CQI of the last feedback calculates based on cell special reference CRS measurement, SINR _{Target, ack}Target signal to noise ratio dB value during for transferring ACK information on PHICH; P _RSBe the energy value EPRE of each resource element of CRS, unit is dBm;

B2, when said HI (j) is ACK, with said UE _mCurrent power gain factors g _{M, j}, as the last time will be to UE _mThe power gain factors g that is adopted when sending ACK/NACK information _{M, an}

When said HI (j) is NACK, with said UE _mCurrent power gain factors g _{M, j}With preset NACK gain adjustment factor Δ _{NACK_ACK_linear}Product, as the last time will be to UE _mThe power gain factors g that is adopted when sending ACK/NACK information _{M, an}

4. according to the described arbitrary method of claim 1 to 3, it is characterized in that said method further comprises, in advance according to Confirm said UE _mPower gain factors initial value g _{M, ini}, wherein, SINR _BaseFor according to UE _mThe signal to noise ratio dB value that the channel quality information CQI of the last feedback calculates based on cell special reference CRS measurement, SINR _{Target, ack}Target signal to noise ratio dB value during for transferring ACK information on PHICH; P _RSBe the energy value EPRE of each resource element of CRS, unit is dBm.

5. according to the described arbitrary method of claim 1 to 3, it is characterized in that said method further comprises, in advance according to

Confirm said UE _mPower gain factors initial value g _{M, ini}, wherein,

For being the maximum transmission power of antenna port p, unit is dBm;

Be the resource element number of non-reference signal in whole bandwidth of sub-district,

Be the resource element number of cell special reference in whole bandwidth of sub-district, P _RSBe the energy value EPRE of each resource element of CRS, unit is dBm.

6. according to the described arbitrary method of claim 1 to 3, it is characterized in that said method further comprises, in advance according to

Confirm said UE _mPower gain factors initial value g _{M, ini},

Wherein, SINR _RefBe the target signal to noise ratio dB value of preset sub-district, SINR _{Target, ack}During for transferring ACK information on PHICH target signal to noise ratio dB value; P _RSEnergy value EPRE for each resource element of CRS.

7. method according to claim 3 is characterized in that, further comprises after the said step b2:

The said g that confirms among b3, the determining step b2 _{M, an}Whether greater than

P _{HI, HL}Be preset ACK/NACK maximum power thresholding, if then will

As the last time will be to UE _mThe power gain factors g that is adopted when sending ACK/NACK information _{M, an}Otherwise, judge g _{M, an}Whether less than

Be preset ACK/NACK minimum power thresholding, if then will

As the last time will be to UE _mThe power gain factors g that is adopted when sending ACK/NACK information _{M, an}

8. method according to claim 7 is characterized in that, further comprises after the said step b:

For each PHICH group, according to preset PHICH power pond size

With said g _{M, an}, dispose the PHICH transmitting power that this PHICH organizes interior each subscriber equipment; Said configuration comprises:

C1, with the power gain factors g of each subscriber equipment in current this PHICH group that obtains _{M, an}Corresponding performance number g ² _{M, an}Add up, obtain

If c2

Execution in step d3 then, otherwise execution in step d6, wherein, when adopting the regular circulation prefix, m _iBe the PHICH set of calculated corrected parameter of confirming according to TDD ascending-descending subframes configuration,

For the PHICH group number that calculates according to broadcast, when adopting extended cyclic prefix, $P_{\mathrm{RE},\mathrm{Max}}^{\left(p\right)}=\frac{P_{\mathrm{PHICH},\mathrm{Max}}^{\left(p\right)}}{6\·m_i\·N_{\mathrm{PHICH}}^{\mathrm{Group}}};$

C3, in this PHICH group

Equaled P _{HI, LL}Subscriber equipment, be labeled as And calculate in current this PHICH group and own

Sum obtains

C4, in this PHICH group

Be not equal to P _{HI, LL}Subscriber equipment, according to $g_{m,\mathrm{An}}^2=g_{m,\mathrm{An}}^2\·\frac{P_{\mathrm{RE},\mathrm{Max}}^{\left(p\right)}-\underset{\mathrm{Intra}-\mathrm{Group}}{\mathrm{\Σ}}{g}_{m,\mathrm{An},\mathrm{Min}}^2}{P_{\mathrm{RE},\mathrm{Group}}^{\left(p\right)}-\underset{\mathrm{Intra}-\mathrm{Group}}{\mathrm{\Σ}}{g}_{m,\mathrm{An},\mathrm{Min}}^2},$ Right

Upgrade;

After c5, judgement are upgraded each Whether less than P _{HI, LL}, if having

Less than P _{HI, LL}Then should

Be configured to P _{HI, LL}, execution in step c1;

C6, finish said configuration.