CN103986551B - A kind of determination method and device of physical downlink control channel resource - Google Patents
A kind of determination method and device of physical downlink control channel resource Download PDFInfo
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Abstract
The present invention provides a kind of determination method and devices of PDCCH resource, since the information of base station transmission whether is received according to UE in the present invention, the control channel power and the CCE degree of polymerization of UE are adjusted, when receiving ACK or NACK of UE feedbacks, think that UE has received the information of base station transmission, lower the CCE degree of polymerization of the power and UE of control channel, as the DTX of UE feedbacks, think that UE does not receive the information of base station transmission, need the CCE degree of polymerization of the power and UE of up-regulation control channel, to ensure the reasonability of control channel power and the adjustment of the CCE degree of polymerization, and accuracy.
Description
Technical field
The present invention relates to communication technique field more particularly to a kind of Physical Downlink Control Channel (Physical Downlink
Control Channel, PDCCH) resource determination method and device.
Background technology
Third generation partner program (The 3rd Generation Partnership Project, 3GPP) is drilled for a long time
Into in (Long Term Evolution, LTE) system, base station according to the transmission mode and field transmission scheme of user terminal (UE),
Various Downlink Control Information (Downlink Control Information, DCI) Format Types are sent for UE selections, and to
The various DCI format types that UE is sent, which are carried in PDCCH, to be transmitted.
In the 10ms wireless frame structures that LTE is defined, 1ms downlink subframes and a Transmission Time Interval
(Transmission Time Interval, TTI) is corresponding, and PDCCH only takes up time domain and goes forward n orthogonal frequency division multiplexing
(Orthogonal Frequency Division Multiplexing, OFDM) symbol removes other channel occupancies on frequency domain
Remaining frequency band after frequency band, wherein other channels include：Physical format indicates channel (Physical Control Format
Indicator Channel, PCFICH), Physical HARQ Indicator Channel (Physical HARQ Indicator Channel,
PHICH) etc..Therefore only have the reserved running time-frequency resource of limited quantity in each downlink subframe to use for PDCCH.
The least unit of PDCCH time-frequency resource allocatings in order to control channel element (Control Channel Element,
CCE), a CCE includes 9 resource unit groups (Resource Element Group, REG), i.e. 36 resource units
(Resource Element, RE).PDCCH be all made of quadrature phase shift keying (Quadrature Phase Shift Keying,
QPSK it) is modulated, dependent on code check variation adaptive channel variation, and code check changes and the CCE degree of polymerization (the i.e. money of channel occupancy
The quantity in source) it is corresponding, there are four types of aggregation degrees, respectively 1,2,4,8 by CCE in agreement.
A kind of method of determining number of channel control blocks is proposed in the prior art, is needed according to channel matter in this method
Amount instruction (Channel Quality Indicator, CQI) information determines that each optional PDCCH can be held in a radio frames
The maximum number bits of load according to the maximum number bits that determining each PDCCH can be carried, and currently need the control transmitted to believe
The data volume of order determines the mass parameter of each PDCCH, and maximum quality in the mass parameter of determining all PDCCH is joined
Number is compared with threshold value, and a PDCCH is selected from all optional PDCCH in a radio frames according to comparison result, with
And determine the corresponding control channel numbers of blocks of PDCCH of selection.
According to scheme disclosed in the prior art, it is known that estimated using the channel quality of Traffic Channel in the prior art
The channel quality for counting control channel PDCCH, so that it is determined that corresponding CCE aggregation degrees.And the radiation pattern and work(of Traffic Channel
Schemes and the control channels such as rate control there are prodigious differences, cause between the quality of Traffic Channel and the quality of control channel
There may be larger differences, therefore directly use the quality of the channel quality information estimation control channel of Traffic Channel that can exist very
Big estimated bias, cause determining CCE aggregation degrees level it is improper, and PDCCH unlike Traffic Channel there may be
The merging gain being transmitted several times, therefore do not ensure that using the channel quality evaluation control channel of Traffic Channel the biography of PDCCH
Defeated performance.
In addition, PDCCH resource is in addition to the CCE degree of polymerization, that is, running time-frequency resource, further include power resource.Do not have in the prior art
The scheme of the distribution of the power resource of open PDCCH.And when the UE numbers in system are more, data and control resource mainly by
It is limited to PDCCH, so if reasonably adjusting power, UE can be made to use the smaller CCE degree of polymerization, to alleviate PDCCH's
Running time-frequency resource pressure improves the utilization rate of data resource.
Invention content
The present invention provides a kind of determination method and devices of PDCCH resource, and this method is for solving in the prior art
The determination method of PDCCH resource is unreasonable, causes the level of determining CCE aggregation degrees improper, and lack power control
Problem.
The present invention provides the determination method of physical downlink control channel PDCCH resource, the method includes：
Base station judges to obtain the moment in uplink feedback information, if gets the mixed automatic retransfer of user terminal UE feedbacks
Ask HARQ；
When the HARQ for receiving UE feedbacks is to confirm response ACK or negative response NACK, and the ACK or NACK feedbacks correspond to
When the current control channel power and the control channel unit CCE degree of polymerization of the UE, control channel power and the CCE for lowering the UE are poly-
Right at least one；
Be discontinuous transmission DTX when receiving UE feedbacks, and the control channel power of the corresponding UE of DTX feedbacks and
When the CCE degree of polymerization, at least one of the control channel power and the CCE degree of polymerization of the UE is raised.
The present invention provides a kind of determining device of physical downlink control channel PDCCH resource, and described device includes：
Judgment module obtains the moment for judging in uplink feedback information, if gets the mixed of user terminal UE feedbacks
Close automatic repeat request HARQ；
The first adjustment module receives the HARQ of UE feedbacks to confirm response ACK or negative response NACK for working as, and is somebody's turn to do
When the current control channel power and the control channel unit CCE degree of polymerization of the corresponding UE of ACK or NACK feedbacks, the control of the UE is lowered
At least one of channel power and the CCE degree of polymerization processed；
Second adjustment module, for being discontinuous transmission DTX as the HARQ for receiving UE feedbacks, and DTX feedbacks correspond to
When the control channel power and the CCE degree of polymerization of the UE, at least one of the control channel power and the CCE degree of polymerization of the UE is raised.
Whether the present invention provides a kind of determination method and devices of PDCCH resource, due to being connect according to UE in the present invention
Receive the base station transmission information, the control channel power and the CCE degree of polymerization of UE are adjusted, when receive UE feedback
When ACK or NACK, it is believed that UE has received the information of base station transmission, lowers the power of control channel and the CCE degree of polymerization of UE, when
When the DTX of UE feedbacks, it is believed that UE does not receive the information of base station transmission, needs the CCE of the power for raising control channel and UE poly-
It is right, to ensure the reasonability and accuracy of control channel power and the adjustment of the CCE degree of polymerization.
Description of the drawings
Attached drawing described herein is used to provide further understanding of the present invention, and constitutes the part of the present invention, this hair
Bright illustrative embodiments and their description are not constituted improper limitations of the present invention for explaining the present invention.In the accompanying drawings：
Fig. 1 is the determination process schematic of the PDCCH resource provided by the invention；
Fig. 2 is the detailed determination process schematic diagram of the PDCCH resource provided by the invention；
Fig. 3 is the structural schematic diagram of the determining device of the PDCCH resource provided by the invention.
Specific implementation mode
In order to keep technical problems, technical solutions and advantages to be solved clearer, clear, tie below
Drawings and examples are closed, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only
To explain the present invention, it is not intended to limit the present invention.
The present invention provides to ensure the time-domain resource of determining PDCCH and the reasonability of power resource and accuracy
A kind of determination method and device of PDCCH resource.Wherein, the PDCCH resource includes in the present invention：The time-frequency of PDCCH provides
Source, i.e. the CCE degree of polymerization and power resource.
Fig. 1 is the process schematic that the PDCCH resource provided by the invention determines, which includes the following steps：
S101：Base station judges to obtain the moment in uplink feedback information, if gets the mixing of user terminal (UE) feedback
Automatic repeat request (Hybrid Automatic Repeat Request, HARQ).
Specifically, base station may receive UE feedacks at the uplink feedback information moment in the present invention, also may be used
UE feedacks can not be received, when base station receives UE feedacks, judge whether the information received is HARQ,
Subsequent step is carried out when the information is HARQ, otherwise, the determination process without PDCCH resource.
S102：When the HARQ for receiving UE feedbacks is to confirm response (Acknowledgement, ACK) or negative response
(Negative Acknowledgement, NACK), and the current control channel power of the corresponding UE of the ACK or NACK feedbacks and
When the control channel unit CCE degree of polymerization, at least one of the control channel power and the CCE degree of polymerization of the UE is lowered.
Wherein, be directed in the present invention the HARQ information whether ACK, nack message, or whether be DTX using different
Resource determination process.
When the HARQ information be ACK or nack message when, lower the UE control channel power and the CCE degree of polymerization at least
One kind includes：Judge whether current be CCE degree of polymerization adjustment point；
When judging the current adjustment point as the CCE degree of polymerization, lowers the CCE degree of polymerization of the UE and control channel power is carried out
Compensation,
When judge it is current as power adjustment point when, lower the control channel power of the UE.
S103：It is discontinuous transmission (Discontinuous Transmission, DTX) when receiving UE feedbacks, and
When the control channel power and the CCE degree of polymerization of the corresponding UE of DTX feedbacks, control channel power and the CCE polymerizations of the UE are raised
At least one of degree.
When the HARQ information is DTX, at least one of the control channel power and the CCE degree of polymerization that raise the UE includes：
Judge whether current be CCE degree of polymerization adjustment point；
When judging the current adjustment point as the CCE degree of polymerization, raises the CCE degree of polymerization of the UE and be according to the judgement of enabled switch
No adjustment control channel power, when enabled switch is enabled, up-regulation control channel power,
When judge it is current as power adjustment point when, raise the control channel power of the UE.
In addition, in the present invention when base station receives the ACK or nack message of UE transmissions, then base station thinks that UE is received
Its information sent at the descending scheduling moment illustrates that the degree of polymerization of the power and CCE of the UE control channels at this time can protect
The transmission for demonstrate,proving data, in order to effectively utilize resource, base station to lower the control channel of UE under the transmission performance for ensureing PDCCH
At least one of power and the CCE degree of polymerization.Meanwhile when the base station receives the DTX of UE transmissions, base station thinks that UE does not connect
Its information sent at the descending scheduling moment is received, illustrates the transmission performance that can not ensure PDCCH at this time, needs to raise UE controls
At least one of the degree of polymerization of channel power and CCE.
When determining whether to be adjusted the control channel power of UE and at least one of the CCE degree of polymerization, also to judge
Whether the ACK/NACK information or DTX information correspond to the current control channel power of the UE and the CCE degree of polymerization.
It is provided with control channel power adjustment point in the present invention and the CCE degree of polymerization adjusts point, is the CCE degree of polymerization when currently
When adjusting point, and meeting some requirements, then the adjustment of the CCE degree of polymerization and control channel power is carried out, is believed in order to control when currently
When road power adjustment point, then the control channel power of UE is adjusted.
Fig. 2 is the detailed determination process schematic diagram of the PDCCH resource provided by the invention, which includes the following steps：
S201：Base station judges to obtain the moment in uplink feedback information, if gets the mixing of user terminal UE feedbacks certainly
Dynamic retransmission request HARQ carries out step S202 when judging result is to be, otherwise, carries out step S209.
S202：Judge whether the HARQ is ACK (or NACK) or DTX, the HARQ is ACK or NACK when interpretation, is walked
Rapid S203 carries out step S206 when the HARQ is DTX.
S203：When the HARQ for receiving UE feedbacks is ACK or NACK, whether current judgement is CCE degree of polymerization adjustment point, when
Judging result is when being, to carry out step S204, when being currently power adjustment point, carries out step S205, otherwise, carries out step
S209。
S204：It lowers the CCE degree of polymerization of the UE and control channel power is compensated.
Specifically in the present invention, lower the CCE degree of polymerization of the UE and to control channel power compensate including：
Judge whether the control channel power of current UE is less than the first power threshold of setting, and the current CCE of the UE are poly-
It is right to be located in the corresponding CCE degree of polymerization interval range of first power threshold；When the control channel power of the UE is less than setting
The first power threshold, and the current CCE degree of polymerization of the UE is located at the corresponding CCE degree of polymerization interval range of first power threshold
When interior, then CCE statistics are adjusted to the sum of current CCE statistics adjusting step corresponding with the non-DTX of setting；Judge adjustment
Whether the CCE statistics afterwards are no more than the downward CCE degree of polymerization threshold values set；The CCE statistics after adjustment are not
More than setting the downward CCE degree of polymerization threshold values when, then the CCE degree of polymerization is adjusted to the half of the current CCE degree of polymerization, simultaneously
CCE statistics are reset, and according to power current UE, the final CCE degree of polymerization for determining the UE after adjustment；According to setting
The corresponding power back-off step-length of the CCE degree of polymerization is lowered, the control channel power of the UE is compensated.
S205：Lower the control channel power of the UE.
The control channel power for lowering the UE includes：According to the whole step-length of the power decreasing of setting, the control of the UE is lowered
Channel power.
S206：It is discontinuous transmission DTX when receiving UE feedbacks, judges whether current be CCE degree of polymerization adjustment point, when
Judging result is when being, to carry out step S207, when being currently power adjustment point, carries out step S208, otherwise, carries out step
S209。
S207：It raises the CCE degree of polymerization of the UE and judges whether to control channel power adjustment.
Specifically, the CCE degree of polymerization for raising the UE in the present invention includes with control channel power is adjusted：
Judge whether the control channel power of current UE is more than the second power threshold of setting, and the current CCE of the UE are poly-
It is right to be located in the corresponding CCE degree of polymerization interval range of second power threshold；When the control channel power of the UE is more than setting
The second power threshold, and the current CCE degree of polymerization of the UE is located at the corresponding CCE degree of polymerization interval range of second power threshold
When interior, then CCE statistics are adjusted to the sum of current CCE statistics adjusting step corresponding with the DTX of setting；After judging adjustment
The CCE statistics whether be more than setting up-regulation CCE degree of polymerization threshold values；The CCE statistics after adjustment, which are more than, to be set
When fixed up-regulation CCE degree of polymerization threshold values, then the CCE degree of polymerization is adjusted to 2 times of the current CCE degree of polymerization, while CCE being united
Metering resetting, and according to power current UE, the final CCE degree of polymerization for determining the UE after adjustment；According to it is enabled switch whether
It is enabled, power adjustment is judged whether to, when enabled switch is enabled, then according to the corresponding work(of the up-regulation CCE degree of polymerization of setting
Rate compensates step-length, adjusts the control channel power of the UE.
S208：Raise the control channel power of the UE.
The control channel power for raising the UE includes：According to the step-length adjusted on the power of setting, the control of the UE is raised
Channel power.
S209：Determination without PDCCH resource.
It is illustrated with reference to specific embodiment.In the present invention in order to constrain PDCCH RE power dynamic model
It encloses, the power relative to cell reference signals (Reference Signals, RS) is：[D2_MIN, D2_MAX] dB.And needle
To UE setting power threshold D2 (i), the integer that the value range of i is 1~3.The CCE aggregation degree thresholdings of each power points are set,
The corresponding CCE aggregation degrees L (0) of D2 (1) power points~L (1), the corresponding CCE aggregation degrees L (1) of D2 (2) power~L (2), D2 (3)
The corresponding CCE aggregation degrees L (2) of power~L (3), wherein L (i) are less than L (i+1), and the value range of L (i) is { 1,2,4,8 }, D2
(i) value range is [D2_MIN, D2_MAX], and D2 (i) is less than D2 (i+1).
Base station judge currently for uplink (UL) feedback information obtain the moment, the uplink feedback information obtain the moment judgement be
The no HARQ for getting UE feedbacks carries out the determination of PDCCH resource for the UE of each feedback HARQ.
If the HARQ of UE feedbacks is ACK or NACK, and the control channel power P of the current UEUE_iIt polymerize with CCE
Spend LCCE_i, the current control channel power of the UE and the CCE degree of polymerization are corresponded to, then judge to be needed to the CCE degree of polymerization and control
Channel power processed is adjusted, and is still only adjusted to control channel power.
When currently adjusting point for the CCE degree of polymerization, since base station is provided with power threshold D2 (i) for UE, and refer to
The power P of signalRSIt will also be appreciated that being in addition provided with the whole step-length of power decreasing in the present inventionTherefore in this hair
First power threshold of bright middle setting can be expressed asIt is carried out respectively for different power points i
Judge PUE_iWhether the first power threshold is less thanAnd according to the value of current i, judge that CCE is poly-
Right LCCE_iWhether it is located in the corresponding CCE degree of polymerization interval range of the first power threshold, that is, judges (L (i-1)<LCCE_i<=L
(i)).WhereinThe BLER desired values of control channel are BLERt。
When the current control channel power of the UEAnd the CCE degree of polymerization of UE
LCCE_iMeet (L (i-1)<LCCE_i<=L (i)) when, then adjust CCE statistic Δs CCEi, by Δ CCEiIt is adjusted to current CCE
Statistic Δ CCEiAdjusting step corresponding with the non-DTX of settingThe sum of, i.e.,
According to the CCE statistic Δs CCE after adjustmenti, interpretation Δ CCEiWhether no more than the downward CCE polymerizations set
Threshold value is spent, the wherein downward CCE degree of polymerization threshold value set judges Δ CCE as Thr1iWhether Thr1 is not more than, when
ΔCCEi<When=Thr1, then by CCE degree of polymerization L 'CCE_iIt is adjusted to current CCE degree of polymerization LCCE_iHalf, i.e. L 'CCE_i=
LCCE_i/ 2, later by CCE statistic Δs CCEiIt sets to 0.
Later, according to control channel power current UE, when the final degree of polymerization for determining the UE after adjustment, when judging UE
Current control channel power PUE_iWith PRSWhen+D2 (i) is equal, i.e. PUE_i==PRS+D2
(i), then the CCE degree of polymerization L ' after adjustingCCE_iFor max (L (i-1), L 'ECC_i)。
When carrying out power adjustment, first according to the corresponding power back-off step-length of the downward CCE degree of polymerizationTo working as
The control channel power of preceding UE compensates, the control channel power P of the UE after compensation 'UE_iFor the control channel work(of current UE
Rate power back-off step-length corresponding with the CCE degree of polymerization is loweredLater, i.e.,Root later
The control channel power of the UE after adjustment, the limitation for being limited to determine according to different UE of the wherein UE are determined according to the limitation of UE
Information, such as can be the restricted information determined according to different UE types, determine the control channel power of the UE after the adjustment
P″UE_iFor max (min (PRS+ D2_MAX, P'UE_i), PRS+D2_MIN)
In addition, in the present invention if under CCE aggregation degrees adjust a grade, set power back-off asThen
It needs to meetThen
The control channel power P of UE after adjustmentUE_iFor P "UE_i, the CCE degree of polymerization L after adjustmentCCE_iFor L 'CCE_i, base station
Control channel power and the CCE degree of polymerization current to the corresponding UE at this time is updated, when being determined so as to follow-up PDCCH resource
It uses.
When currently channel power adjustment point in order to control, then only the control channel power of UE is adjusted, first basis
The whole step-length of the power decreasing of settingFirst time adjustment is carried out to the control channel power of the UE, after this is adjusted for the first time
Control channel power be the control channel power of current UE and whole the sum of the step-length of power decreasing of setting.Later according to max
(min(PRS+ D2_MAX, P'UE_i), PRS+ D2_MIN) determine adjustment after UE control channel power P "UE_i, i.e., P at this time "UE_i
=max (min (PRS+ D2_MAX, P'UE_i), PRS+ D2_MIN), and keep the CCE degree of polymerization constant.
The control channel power P of UE after adjustmentUE_iFor P "UE_i, the CCE degree of polymerization L after adjustmentCCE_iFor L 'CCE_i, base station
The control channel power P for the UE that itself is preserved at this timeUE_iAnd CCE degree of polymerization LCCE_iIt is updated, so as to follow-up PDCCH
It is used when resource determines.
When base station judge the UE feedback HARQ for DTX, and currently the UE control channel power PUE_iIt polymerize with CCE
Spend LCCE_iWhen with the control channel power and the corresponding identical CCE degree of polymerization of the UE that base station itself currently preserves, need to improve UE
Control channel power and at least one of the CCE degree of polymerization.
When currently adjusting point for the CCE degree of polymerization, since base station is provided with power threshold D2 (i) for UE, and refer to
The power P of signalRSIt will also be appreciated that being in addition provided with the step-length adjusted on power in the present inventionTherefore in the present invention
Second power threshold of setting can be expressed asJudged respectively for different power points i
PUE_iWhether the second power threshold is more thanAnd according to the value of current i, judge the CCE degree of polymerization
LCCE_iWhether it is located in the corresponding CCE degree of polymerization interval range of the second power threshold, that is, judges (L (i-1)<=LCCE_i<L
(i))。
When the current control channel power of the UEAnd the CCE degree of polymerization of UE
LCCE_iMeet (L (i-1)<=LCCE_i<L (i)) when, then adjust CCE statistic Δs CCEi, by Δ CCEiIt is adjusted to current CCE
Statistic Δ CCEiAdjusting step corresponding with the DTX of settingThe sum of, i.e.,According to adjustment
CCE statistic Δs CCE afterwardsi, interpretation Δ CCEiWhether the up-regulation CCE degree of polymerization threshold value of setting, the wherein setting are more than
Up-regulation CCE degree of polymerization threshold values be Thr, that is, judge Δ CCEiWhether Thr is more than, as Δ CCEi>When Thr, then CCE is polymerize
Spend LCCE_iIt is adjusted to current CCE degree of polymerization LCCE_i2 times, i.e. LCCE_i=2LCCE_i。
Later, according to control channel power current UE, when the final degree of polymerization for determining the UE after adjustment, when judging UE
Current control channel power PUE_iWith PRSWhen+D2 (i) is equal, i.e. PUE_i==PRS+D2
(i), then the CCE degree of polymerization L ' after adjustingCCE_iFor min (L (i), L 'ECC_i)。
Also, in the present invention if in CCE aggregation degrees adjust a grade, set power back-off asThen need
MeetThereforePerformance difference between N expression Neighbor Sets are right.Whether to carry out power back-off enabled switch when adjustment on CCE, 1 is enabled, and 0 does not enable.
When carrying out power adjustment, first according to judging whether the enabled switch of the carry out power back-off enables, that is, judgeWhether it is 1, when thisWhen, i.e., when the enabled switch enables, according to the up-regulation CCE of setting
The corresponding power back-off step-length of the degree of polymerizationThe control channel power of current UE is compensated, the UE's after compensation
Control channel power P 'UE_iFor the control channel power power back-off step-length corresponding with the up-regulation CCE degree of polymerization of current UELater, i.e.,
Later, the control channel power of the UE after adjustment is determined according to the limitation of UE, the wherein UE's is limited to according to not
The restricted information that same UE is determined, such as can be the restricted information determined according to different UE types, after determining the adjustment
UE control channel power P "UE_iFor max (min (PRS+ D2_MAX, P'UE_i), PRS+ D2_MIN), i.e., the UE after adjusting at this time
Control channel power PUE_i=P "UE_i, the CCE degree of polymerization L after the adjustmentCCE_i=L'CCE_i。
When the enabled switch of the carry out power back-off to be not enabled on,When being 0, then without control channel
The control channel power of power adjustment, the UE is PUE_i, the CCE degree of polymerization L after the adjustmentCCE_i=L 'CCE_i。
When currently channel power adjustment point in order to control, then only the control channel power of UE is adjusted, first basis
The step-length adjusted on the power of settingFirst time adjustment is carried out to the control channel power of the UE, after this is adjusted for the first time
Control channel power be the sum of the step-length that adjusts on the control channel power of current UE and the power of setting, later according to max
(min(PRS+ D2_MAX, P'UE_i), PRS+ D2_MIN) determine adjustment after UE control channel power P "UE_i, i.e., P at this time "UE_i
=max (min (PRS+ D2_MAX, P'UE_i), PRS+ D2_MIN), and keep the CCE degree of polymerization constant.
The control channel power P of UE after adjustmentUE_iFor P "UE_i, CCE degree of polymerization LCCE_iIt remains unchanged, base station is right at this time
Control channel power and the CCE the degree of polymerization current corresponding UE is updated, and is used when being determined so as to follow-up PDCCH resource.
According to the above method, the control channel power and the CCE degree of polymerization of each UE are adjusted.
Specifically, constraining the Power Dynamic Range of the RE of PDCCH, the power relative to cell RS in the present invention：[D2_
MIN, D2_MAX] dB.To user setting two power thresholds D2' and D2 " (D2' and D2 " are emulation or the value that strategy determines), with
And CCE aggregation degree thresholdings, the power points of CCE aggregation degrees 1~L1 adjustment is corresponded to for D2', for the corresponding CCE aggregation degrees L1 of D2 "
The power points of~L2 adjustment.The value range [D2_MIN, D2_MAX] of the power difference adjustment of UE, i.e. performance number value range：
[PRS+D2_MIN,PRS+D2_MAX]。
And in the present invention if in CCE aggregation degrees adjust a grade, set power back-off asThen need
MeetThereforeIf adjusting a grade under CCE aggregation degrees, set
Power back-off isIt then needs to meetThen
When the HARQ that base station obtains is ACK or NACK, and HARQ information corresponds to the control channel power of the UE
PUE_iWith CCE degree of polymerization LCCE_iWhen ACK or NACK information, need reduce UE control channel power and the CCE degree of polymerization in
It is at least one.
When currently adjusting point for the CCE degree of polymerization, there are two the power adjustment points of UE：PRS+ D2', 1~L1；PRS+ D2 ",
L1~L2, first whenAnd 1<LCCE_i<When=L1, or
And L1<LCCE_i<When=L2, CCE statistic Δs CCE is adjustedi, by Δ CCEiIt is adjusted to current CCE statistics Δ CCEiWith setting
The corresponding adjusting steps of non-DTXThe sum of, i.e.,In the present inventionThe BLER desired values of control channel are BLERt。
According to the CCE statistic Δs CCE after adjustmenti, interpretation Δ CCEiWhether no more than the downward CCE polymerizations set
Threshold T hr1 is spent, as Δ CCEi<When=Thr1, then by CCE degree of polymerization L 'CCE_iIt is adjusted to current CCE degree of polymerization LCCE_i's
Half, i.e. L 'CCE_i=LCCE_i/2。
Later, judge the current control channel power Ps of UEUE_iWith PRSWhen+D2' is equal, then the CCE degree of polymerization after adjusting
L′CCE_i=max (1, L 'CCE_i), if judging the current control channel power Ps of UEUE_iWith PRSWhen+D2 " is equal, then after adjusting
CCE degree of polymerization L 'CCE_i=max (L1, L 'CCE_i)
When carrying out power adjustment, according to the corresponding power back-off step-length of the downward CCE degree of polymerizationTo current UE
Control channel power compensate, the control channel power of the UE after compensationBasis later
The limitation of UE determines the control channel power of the UE after adjustment, determines the control channel power P of the UE after the adjustment "UE_i=max
(min(PRS+ D2_MAX, P'UE_i), PRS+D2_MIN)。
The control channel power P of UE after then adjusting at this timeUE_i=P "UE_i, the CCE degree of polymerization L after adjustmentCCE_i=
L′CCE_i, the control channel power P for the UE that base station at this time preserves itselfUE_iAnd CCE degree of polymerization LCCE_iIt is updated, with
Continue after an action of the bowels when PDCCH resource determines and uses.
When currently channel power adjustment point in order to control, then only the control channel power of UE is adjusted, first basis
The whole step-length of the power decreasing of settingFirst time adjustment is carried out to the control channel power of the UE, after this is adjusted for the first time
Control channel powerLater according to max (min (PRS+ D2_MAX, P'UE_i), PRS+D2_
MIN the control channel power P of the UE after adjustment) is determined "UE_i, i.e., P " at this timeUE_i=max (min (PRS+ D2_MAX, P'UE_i),
PRS+ D2_MIN), and keep the CCE degree of polymerization constant.
The control channel power P of UE after adjustmentUE_iFor P "UE_i, the CCE degree of polymerization L after adjustmentCCE_iIt remains unchanged, base
Stand at this time to itself preserve the UE control channel power PUE_iAnd CCE degree of polymerization LCCE_iIt is updated, so as to follow-up
It is used when PDCCH resource determines.
When base station judges the HARQ of UE feedbacks for DTX, and the control channel power of the current DTX feedback correspondences UE
PUE_iWith CCE degree of polymerization LCCE_iWhen DTX feedback, need improve UE control channel power and the CCE degree of polymerization at least one
It is a.
When currently adjusting point for the CCE degree of polymerization, there are two the power adjustment points of UE：PRS+ D2', 1~L1；PRS+ D2 ",
L1~L2, first whenAnd 1<=LCCE_i<When L1, orAnd
And L1<=LCCE_i<When L2, CCE statistic Δs CCE is adjustedi, by Δ CCEiIt is adjusted to
According to the CCE statistic Δs CCE after adjustmenti, interpretation Δ CCEiWhether the up-regulation CCE degree of polymerization of setting is more than
Threshold T hr, as Δ CCEi>When Thr, then by CCE degree of polymerization L 'CCE_iIt is adjusted to current CCE degree of polymerization LCCE_i2 times, i.e.,
L′CCE_i=LCCE_i*2。
Later, judge the current control channel power Ps of UEUE_iWith PRSWhen+D2' is equal, then the CCE degree of polymerization after adjusting
L′CCE_i=min (L1, L 'CCE_i), if judging the current control channel power Ps of UEUE_iWith PRSWhen+D2 " is equal, then after adjusting
CCE degree of polymerization L 'CCE_i=min (L2, L 'CCE_i)。
When carrying out power adjustment, first according to judging whether the enabled switch of the carry out power back-off enables, that is, judgeWhether it is 1, when thisWhen, it is mended according to the corresponding power of the up-regulation CCE degree of polymerization of setting
Repay step-lengthThe control channel power of current UE is compensated, the control channel power of the UE after compensation
Later, the control channel power that the UE after adjustment is determined according to the limitation of UE, determines the control of the UE after the adjustment
Channel power P "UE_i=max (min (PRS+ D2_MAX, P'UE_i), PRS+ D2_MIN), i.e., the control channel of the UE after adjusting at this time
Power PUE_i=P "UE_i, the CCE degree of polymerization L after the adjustmentCCE_i=L 'CCE_i。
When the enabled switch of the carry out power back-off to be not enabled on,When being 0, then without control channel
The control channel power of power adjustment, the UE is PUE_i, the CCE degree of polymerization L after the adjustmentCCE_i=L 'CCE_i。
When currently channel power adjustment point in order to control, then only the control channel power of UE is adjusted, first basis
The step-length adjusted on the power of settingFirst time adjustment is carried out to the control channel power of the UE, after this is adjusted for the first time
Control channel powerLater according to max (min (PRS+ D2_MAX, P'UE_i), PRS+D2_MIN)
Determine the control channel power P of the UE after adjustment "UE_i, i.e., P " at this timeUE_i=max (min (PRS+ D2_MAX, P'UE_i), PRS+
D2_MIN), and keep the CCE degree of polymerization constant.
Fig. 3 is a kind of determination apparatus structure schematic diagram of physical downlink control channel PDCCH resource provided by the invention, institute
Stating device includes：
Judgment module 31 obtains the moment for judging in uplink feedback information, if gets user terminal UE feedbacks
Hybrid automatic repeat-request HARQ；
The first adjustment module 32 receives the HARQ of UE feedbacks to confirm response ACK or negative response NACK for working as, and
When the current control channel power and the control channel unit CCE degree of polymerization of the corresponding UE of the ACK or NACK feedbacks, lower the UE's
At least one of control channel power and the CCE degree of polymerization；
Second adjustment module 33 receives the HARQ that the UE is fed back as discontinuous transmission DTX for working as, and DTX feedbacks pair
Should UE control channel power and the CCE degree of polymerization when, raise the UE control channel power and the CCE degree of polymerization at least one
Kind.
The first adjustment module 32, specifically for judging whether current be that the CCE degree of polymerization adjusts point；When judgement is currently
It when the corresponding power adjustment point of the CCE degree of polymerization, lowers the CCE degree of polymerization of the UE and control channel power is compensated, when sentencing
It is disconnected when being currently power adjustment point, lower the control channel power of the UE.
The first adjustment module 32, is specifically used for judging whether the control channel power of current UE is less than the first of setting
Power threshold, and the current CCE degree of polymerization of the UE is located in the corresponding CCE degree of polymerization interval range of first power threshold；When
The control channel power of the UE is less than the first power threshold of setting, and the current CCE degree of polymerization of the UE is located at first power
When in the corresponding CCE degree of polymerization interval range of threshold value, then CCE statistics are adjusted to the non-DTX of current CCE statistics and setting
The sum of corresponding adjusting step；Judge the CCE statistics after adjustment whether no more than the downward CCE degree of polymerization thresholdings set
Value；When the CCE statistics after the adjustment are not more than the downward CCE degree of polymerization threshold values of setting, then the CCE degree of polymerization is adjusted
For the half of the current CCE degree of polymerization, and according to power current UE, determine the CCE degree of polymerization of the UE after adjustment；According to setting
The fixed corresponding power back-off step-length of the downward CCE degree of polymerization, compensates the control channel power of the UE.
The first adjustment module 32 is specifically used for, according to the whole step-length of the power decreasing of setting, lowering the control of the UE
Channel power.
The second adjustment module 33, specifically for judging whether current be that the CCE degree of polymerization adjusts point；When judgement is currently
When the corresponding power adjustment point of the CCE degree of polymerization, raises the CCE degree of polymerization of the UE and judge whether to adjust control according to enabled switch
Channel power, when enabled switch is enabled, up-regulation control channel power, when judge currently as power adjustment point when, raise the UE
Control channel power.
The second adjustment module 33, is specifically used for judging whether the control channel power of current UE is more than the second of setting
Power threshold, and the current CCE degree of polymerization of the UE is located in the corresponding CCE degree of polymerization interval range of second power threshold；When
The control channel power of the UE is more than the second power threshold of setting, and the current CCE degree of polymerization of the UE is located at second power
When in the corresponding CCE degree of polymerization interval range of threshold value, then CCE statistics are adjusted to DTX pairs of current CCE statistics and setting
The sum of adjusting step answered；Judge whether the CCE statistics after adjustment are more than the up-regulation CCE degree of polymerization threshold values of setting；When
When the CCE statistics after the adjustment are more than the up-regulation CCE degree of polymerization threshold values of setting, then the CCE degree of polymerization is adjusted to current
2 times of the CCE degree of polymerization, and according to power current UE, determine the CCE degree of polymerization of the UE after adjustment；And when enabled switch
When enabled, according to the corresponding power back-off step-length of the up-regulation CCE degree of polymerization of setting, the control channel power of the UE is adjusted.
The second adjustment module 33 raises the control of the UE specifically for the step-length adjusted on the power according to setting
Channel power.
The specific device can be located in base station.
Whether the present invention provides a kind of determination method and devices of PDCCH resource, due to being connect according to UE in the present invention
Receive the base station transmission information, the control channel power and the CCE degree of polymerization of UE are adjusted, when receive UE feedback
When ACK or NACK, it is believed that UE has received the information of base station transmission, lowers the power of control channel and the CCE degree of polymerization of UE, when
When the DTX of UE feedbacks, it is believed that UE does not receive the information of base station transmission, needs the CCE of the power for raising control channel and UE poly-
It is right, to ensure the reasonability and accuracy of control channel power and the adjustment of the CCE degree of polymerization.
A preferred embodiment of the present invention has shown and described in above description, but as previously described, it should be understood that the present invention
Be not limited to form disclosed herein, be not to be taken as excluding other embodiments, and can be used for various other combinations,
Modification and environment, and the above teachings or related fields of technology or knowledge can be passed through in the scope of the invention is set forth herein
It is modified.And changes and modifications made by those skilled in the art do not depart from the spirit and scope of the present invention, then it all should be in this hair
In the protection domain of bright appended claims.
Claims (6)
1. a kind of determination method of physical downlink control channel PDCCH resource, which is characterized in that the method includes：
Base station judges to obtain the moment in uplink feedback information, if gets the hybrid automatic repeat-request of user terminal UE feedbacks
HARQ；
When the HARQ for receiving UE feedbacks is to confirm response ACK or negative response NACK, judge whether be currently the CCE degree of polymerization
Point is adjusted, when judging the current adjustment point as the CCE degree of polymerization, lowers the CCE degree of polymerization of the UE；
When it is discontinuous transmission DTX to receive UE feedbacks, judge whether current be CCE degree of polymerization adjustment point, when judgement is worked as
When the preceding adjustment point for the CCE degree of polymerization, the CCE degree of polymerization of the UE is raised.
2. the method as described in claim 1, which is characterized in that it is described raise the UE the CCE degree of polymerization include：
Judge whether current be CCE degree of polymerization adjustment point；
When judging the current adjustment point as the CCE degree of polymerization, the CCE degree of polymerization of the UE is raised.
3. method as claimed in claim 2, which is characterized in that it is described raise the UE the CCE degree of polymerization include：
Judge whether the control channel power of current UE is more than the second power threshold of setting, and the CCE degree of polymerization that the UE is current
In the corresponding CCE degree of polymerization interval range of second power threshold；
When the control channel power of the UE is more than the second power threshold of setting, and the current CCE degree of polymerization of the UE be located at this
When in the corresponding CCE degree of polymerization interval range of two power thresholds, then CCE statistics are adjusted to current CCE statistics and setting
The sum of corresponding adjusting steps of DTX；
Judge whether the CCE statistics after adjustment are more than the up-regulation CCE degree of polymerization threshold values of setting；
When the CCE statistics after the adjustment are more than the up-regulation CCE degree of polymerization threshold values of setting, then the CCE degree of polymerization is adjusted
It is 2 times of the current CCE degree of polymerization, and according to power current UE, determines the CCE degree of polymerization of the UE after adjustment.
4. a kind of determining device of physical downlink control channel PDCCH resource, which is characterized in that described device includes：
Judgment module obtains the moment for judging in uplink feedback information, if gets the mixing of user terminal UE feedbacks certainly
Dynamic retransmission request HARQ；
The first adjustment module, for when the HARQ for receiving UE feedbacks is to confirm response ACK or negative response NACK, judging to work as
Whether preceding be CCE degree of polymerization adjustment point, when judging the current adjustment point as the CCE degree of polymerization, lowers the CCE degree of polymerization of the UE；
Second adjustment module, for when the HARQ for receiving UE feedbacks is discontinuous transmission DTX, judging whether be currently CCE
The degree of polymerization adjusts point, when judging the current adjustment point as the CCE degree of polymerization, raises the CCE degree of polymerization of the UE.
5. device as claimed in claim 4, which is characterized in that the second adjustment module, be specifically used for judging it is current whether
Point is adjusted for the CCE degree of polymerization；When judging current power adjustment point corresponding as the CCE degree of polymerization, the CCE polymerizations of the UE are raised
Degree.
6. device as claimed in claim 5, which is characterized in that the second adjustment module is specifically used for judging current UE
Whether control channel power is more than the second power threshold of setting, and the current CCE degree of polymerization of the UE is located at second power-threshold
It is worth in corresponding CCE degree of polymerization interval range；When the control channel power of the UE is more than the second power threshold of setting, and the UE
When the current CCE degree of polymerization is located in the corresponding CCE degree of polymerization interval range of second power threshold, then by CCE statistic tune
Whole is the sum of current CCE statistics adjusting step corresponding with the DTX of setting；Judge whether the CCE statistics after adjustment are big
In the up-regulation CCE degree of polymerization threshold values of setting；The CCE statistics after adjustment are more than the up-regulation CCE degree of polymerization doors of setting
When limit value, then the CCE degree of polymerization is adjusted to 2 times of the current CCE degree of polymerization, and according to power current UE, after determining adjustment
The UE the CCE degree of polymerization.
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| CN201110202465.1A CN102892186B (en) | 2011-07-19 | 2011-07-19 | Method and device for determining physical downlink control channel resource |
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| CN108156663A (en) * | 2017-12-25 | 2018-06-12 | 西安科技大学 | A kind of method for improving control channel resource allocation in LTE |
| CN108702255B (en) * | 2018-06-01 | 2021-04-27 | 北京小米移动软件有限公司 | Method and device for controlling hybrid automatic repeat request (HARQ) feedback |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101843012A (en) * | 2007-11-05 | 2010-09-22 | Lg电子株式会社 | Method of controlling power in wireless communication system |
| CN101895936A (en) * | 2009-05-18 | 2010-11-24 | 中兴通讯股份有限公司 | Method and device for distributing control channel resources |
| JP2011514735A (en) * | 2008-02-08 | 2011-05-06 | クゥアルコム・インコーポレイテッド | Discontinuous transmission signaling over uplink control channel |
| CN102123018A (en) * | 2010-01-11 | 2011-07-13 | 北京三星通信技术研究有限公司 | Method for feeding back receiving state in hybrid automatic retransmitting request |
| CN102892186A (en) * | 2011-07-19 | 2013-01-23 | 中兴通讯股份有限公司 | Method and device for determining physical downlink control channel resource |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101843012A (en) * | 2007-11-05 | 2010-09-22 | Lg电子株式会社 | Method of controlling power in wireless communication system |
| JP2011514735A (en) * | 2008-02-08 | 2011-05-06 | クゥアルコム・インコーポレイテッド | Discontinuous transmission signaling over uplink control channel |
| CN101895936A (en) * | 2009-05-18 | 2010-11-24 | 中兴通讯股份有限公司 | Method and device for distributing control channel resources |
| CN102123018A (en) * | 2010-01-11 | 2011-07-13 | 北京三星通信技术研究有限公司 | Method for feeding back receiving state in hybrid automatic retransmitting request |
| CN102892186A (en) * | 2011-07-19 | 2013-01-23 | 中兴通讯股份有限公司 | Method and device for determining physical downlink control channel resource |
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