WO2012155735A1

WO2012155735A1 - Method and device for deciding physical downlink control channel resource

Info

Publication number: WO2012155735A1
Application number: PCT/CN2012/074030
Authority: WO
Inventors: 闫金凤
Original assignee: 中兴通讯股份有限公司
Priority date: 2011-07-19
Filing date: 2012-04-13
Publication date: 2012-11-22
Also published as: CN102892186B; JP2014523209A; JP5735178B2; CN102892186A

Abstract

Disclosed is a method for deciding a physical downlink control channel (PDCCH) resource, which comprises: a base station acquiring a hybrid automatic repeat request (HARQ) fed back a user equipment (UE) during acquisition of uplink feedback information; when the HARQ is an acknowledgement (ACK) or a negative-acknowledgement (NACK), and the ACK or NACK feedback corresponds to the current control channel power and control channel unit CCE aggregation level of the UE, lowering at least one of the control channel power and CCE aggregation level of the UE; when the HARQ is discontinuous transmission (DTX), and the DTX feedback corresponds to the control channel power and CCE aggregation level of the UE, raising at least one of the control channel power and CCE aggregation level of the UE. Further correspondingly disclosed is a device for deciding a PDCCH resource. Through the present invention, the reasonableness and accuracy of adjustment of the control channel power and CCE aggregation level can be guaranteed.

Description

Method and device for determining physical downlink control channel resources

The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for determining a Physical Downlink Control Channel (PDCCH) resource. Background technique

In the 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) system, the base station selects and sends various downlink control information for the UE according to the transmission mode and transmission scheme of the user equipment (UE). (Downlink Control Information, DCI) format type, and various DCI format types sent to the UE are carried in the PDCCH for transmission.

In the 10 ms radio frame structure defined by LTE, the lms downlink subframe corresponds to a Transmission Time Interval (TTI), and the PDCCH only occupies the first n orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing) in the time domain. OFDM) symbol, the remaining frequency band after removing the frequency band occupied by other channels in the frequency domain, wherein the other channels include: a Physical Control Format Indicator Channel (PCFICH), a Physical HARQ Indicator Channel (PHICH), and the like. Therefore, only a limited number of reserved time-frequency resources are available for the PDCCH in each downlink subframe.

The minimum unit of PDCCH time-frequency resource allocation is Control Channel Element (CCE), and one CCE contains 9 Resource Element Groups (REGs), that is, 36 Resource Element (RE) ₀ PDCCH The modulation is performed by Quadrature Phase Shift Keying (QPSK), which adapts to the channel change depending on the code rate change, and the code rate change corresponds to the CCE aggregation degree (that is, the number of resources occupied by the channel), and the CCE in the protocol has The four degree of aggregation are 1, 2, 4, and 8, respectively. In the prior art, a method for determining the number of channel control blocks is proposed. The method needs to determine the maximum bit that each optional PDCCH can carry in a radio frame according to Channel Quality Indicator (CQI) information. And determining, according to the determined maximum number of bits that each PDCCH can carry, and the amount of data of the control signaling that needs to be transmitted, determining a quality parameter of each PDCCH, and determining a maximum quality parameter and a threshold of the quality parameters of all the PDCCHs that are determined. For comparison, one PDCCH is selected from all optional PDCCHs in one radio frame according to the comparison result, and the number of control channel blocks corresponding to the selected PDCCH is determined.

According to the solution disclosed in the prior art, it is known that the channel quality of the control channel PDCCH is estimated by using the channel quality of the traffic channel in the prior art, thereby determining the corresponding CCE aggregation degree. However, there are great differences between the transmission mode and the power control scheme of the traffic channel and the control channel, which may result in a large difference between the quality of the traffic channel and the quality of the control channel. Therefore, the channel quality information estimation control of the traffic channel is directly used. There is a large estimation bias in the quality of the channel, which results in a determined level of CCE aggregation, and the PDCCH does not have a combined gain of multiple transmissions like the traffic channel. Therefore, the channel quality is used to estimate the control channel. The transmission performance of the PDCCH cannot be guaranteed.

In addition, the PDCCH resource includes power resources in addition to CCE aggregation degree real-time resources. The scheme of allocation of power resources of the PDCCH is not disclosed in the prior art. When the number of the UEs in the system is large, the data and the control resources are mainly limited to the PDCCH. Therefore, if the power is adjusted reasonably, the UE can adopt a smaller CCE aggregation degree, thereby alleviating the time-frequency resource tension of the PDCCH and improving the data. Utilization of resources. Summary of the invention

The embodiment of the present invention provides a method and a device for determining a PDCCH resource, which are used to solve the problem that the PDCCH resource determination method in the prior art is unreasonable, the level of the determined CCE aggregation degree is inappropriate, and the power control problem is lacking.

An embodiment of the present invention provides a method for determining a PDCCH resource of a physical downlink control channel, including: The base station acquires the hybrid automatic repeat request HARQ fed back by the user terminal UE at the time of acquiring the uplink feedback information;

When the ACK or NACK feedback corresponds to the current control channel power of the UE and the CCE aggregation degree of the control channel unit, the base station lowers at least one of the control channel power and the CCE aggregation degree of the UE; when the HARQ received by the UE is intermittent transmission DTX, and when the DTX feedback corresponds to the control channel power and the CCE aggregation degree of the UE, at least one of the control channel power and the CCE aggregation degree of the UE is raised.

And determining, by the UE, at least one of a control channel power and a CCE aggregation degree of the UE: determining whether the current time is a CCE aggregation degree adjustment point;

When it is determined that the current time is the CCE aggregation degree adjustment point, the CCE aggregation degree of the UE is lowered and the control channel power is compensated.

When it is determined that the current time is the control channel power adjustment point, the control channel power of the UE is lowered.

Determining the CCE aggregation degree of the UE and compensating the control channel power to: determine whether the control channel power of the current UE is less than the set first power threshold, and whether the current CCE aggregation degree of the UE is located at the first power threshold. In the range of the CCE aggregation degree range, when the control channel power of the UE is less than the set first power threshold, and the current CCE aggregation degree of the UE is within the CCE aggregation degree range corresponding to the first power threshold, The CCE statistic is adjusted to the sum of the current CCE statistic and the set non-DTX corresponding adjustment step; whether the adjusted CCE statistic is not greater than the set CCE aggregation degree threshold, when the adjustment is performed If the CCE statistic is not greater than the set CCE aggregation degree threshold, the CCE aggregation degree is adjusted to be half of the current CCE aggregation degree, and the adjusted UE is determined according to the current control channel power of the UE. CCE polymerization degree;

Compensating the control of the UE according to the set power compensation step size corresponding to the CCE aggregation degree Channel power.

The down regulating the control channel power of the UE includes:

The control channel power of the UE is lowered according to the step size adjusted under the set power.

The at least one of the control channel power and the CCE aggregation degree of the UE is: determining whether the current time is a CCE aggregation degree adjustment point;

When it is determined that the current time is the CCE aggregation degree adjustment point, the CCE aggregation degree of the UE is raised and the control channel power is adjusted according to the enable switch. When the enable switch is enabled, the control channel power is raised.

When it is determined that the current time is a power adjustment point, the control channel power of the UE is raised.

The up-regulating the control channel power and the CCE aggregation degree of the UE includes:

Determining whether the current control channel power of the UE is greater than the set second power threshold, and whether the current CCE aggregation degree of the UE is within the CCE aggregation degree range corresponding to the second power threshold, when the control channel power of the UE is greater than The second power threshold is set, and when the current CCE aggregation degree of the UE is within the CCE aggregation degree interval corresponding to the second power threshold, the CCE statistic is adjusted to adjust the current CCE statistic corresponding to the set DTX. The sum of the step lengths is determined whether the adjusted CCE statistic is greater than the set CCE aggregation degree threshold. When the adjusted CCE statistic is greater than the set CCE aggregation degree threshold, the The CCE aggregation degree is adjusted to be twice the current CCE aggregation degree, and the adjusted CCE aggregation degree of the UE is determined according to the current power of the UE;

When the enable switch is enabled, the control channel power of the UE is adjusted according to the set power compensation step size corresponding to the CCE aggregation degree.

The up regulating the control channel power of the UE includes:

The control channel power of the UE is adjusted according to the set step of the power adjustment.

The embodiment of the invention further provides a device for determining a PDCCH resource of a physical downlink control channel, The determining module is configured to determine whether the hybrid automatic repeat request (HARQ) fed back by the user terminal UE is obtained at the time of acquiring the uplink feedback information;

a first adjustment module, configured to: when receiving the HARQ fed back by the UE as an acknowledgement acknowledgement ACK or a negative acknowledgement NACK, and the ACK or NACK feedback corresponds to the current control channel power of the UE and the CCE aggregation degree of the control channel unit, the UE is down-regulated At least one of control channel power and CCE aggregation degree;

a second adjustment module, configured to: when the HARQ received by the UE is received to continue to transmit DTX, and the DTX feedback corresponds to the control channel power and the CCE aggregation degree of the UE, the control channel power and the CCE aggregation degree of the UE are raised at least One.

The first adjustment module is specifically configured to determine whether the current time is a CCE aggregation degree adjustment point; when it is determined that the current CCE aggregation degree adjustment point is, the CCE aggregation degree of the UE is lowered and the control channel power is compensated, when determining the current When the power is adjusted, the control channel power of the UE is lowered.

The first adjustment module is specifically configured to determine whether the current control channel power of the UE is less than the set first power threshold, and whether the current CCE aggregation degree of the UE is within the CCE aggregation degree range corresponding to the first power threshold. When the control channel power of the UE is less than the set first power threshold, and the current CCE aggregation degree of the UE is within the CCE aggregation degree range corresponding to the first power threshold, the CCE statistic is adjusted to the current CCE. The sum of the statistic and the set non-DTX adjustment step; whether the adjusted CCE statistic is not greater than the set CCE aggregation degree threshold; when the adjusted CCE statistic is not greater than When the CCE aggregation degree threshold is lowered, the CCE aggregation degree is adjusted to be half of the current CCE aggregation degree, and the adjusted CCE aggregation degree of the UE is determined according to the current power of the UE; The power compensation step size corresponding to the degree of aggregation compensates the control channel power of the UE.

The first adjustment module is specifically configured to lower the control channel power of the UE according to the step size adjusted under the set power. The second adjustment module is specifically configured to determine whether the current time is a CCE aggregation degree adjustment point; when it is determined that the current power adjustment point corresponding to the CCE aggregation degree, the CCE aggregation degree of the UE is raised and determined according to the enable switch. Control channel power, when the enable switch is enabled, the control channel power is raised, and when it is determined that the power adjustment point is currently, the control channel power of the UE is raised.

The second adjustment module is specifically configured to determine whether the current control channel power of the UE is greater than the set second power threshold, and whether the current CCE aggregation degree of the UE is within the CCE aggregation degree range corresponding to the second power threshold. When the control channel power of the UE is greater than the set second power threshold, and the current CCE aggregation degree of the UE is within the CCE aggregation degree range corresponding to the second power threshold, the CCE statistics are adjusted to the current CCE. The sum of the adjustment step size corresponding to the set DTX; determining whether the adjusted CCE statistic is greater than the set upward CCE aggregation degree threshold; when the adjusted CCE statistic is greater than the set upward adjustment When the CCE aggregation threshold is set, the CCE aggregation degree is adjusted to twice the current CCE aggregation degree, and the adjusted CCE aggregation degree of the UE is determined according to the current power of the UE; and when the enable switch is enabled. And adjusting the control channel power of the UE according to the set power compensation step size corresponding to the CCE aggregation degree.

The second adjustment module is specifically configured to: adjust a control channel power of the UE according to a step size of the set power adjustment.

In the embodiment of the present invention, according to whether the UE receives the information sent by the base station, the control channel power and the CCE aggregation degree of the UE are adjusted. When receiving the ACK or NACK fed back by the UE, the UE is considered to have received the information sent by the base station. The power of the control channel and the CCE aggregation degree of the UE are lowered. When the DTX fed back by the UE is received, it is considered that the UE does not receive the information sent by the base station, and the power of the control channel and the CCE aggregation degree of the UE need to be adjusted to ensure the control channel power. And the rationality of the CCE polymerization degree adjustment, as well as the accuracy. DRAWINGS

FIG. 1 is a schematic diagram of a process of determining the PDCCH resource provided by the present invention; 2 is a schematic diagram of a detailed determining process of the PDCCH resource provided by the present invention;

FIG. 3 is a schematic structural diagram of an apparatus for determining the PDCCH resource provided by the present invention. detailed description

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments in order to make the present invention. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In order to ensure the reasonableness and accuracy of the determined time domain resources and power resources of the PDCCH, the embodiment of the present invention provides a method and a device for determining PDCCH resources. In the embodiment of the present invention, the PDCCH resource includes: a time-frequency resource of the PDCCH, that is, a CCE aggregation degree, and a power resource.

FIG. 1 is a schematic diagram of a process for determining the PDCCH resource provided by the present invention, where the process includes the following steps:

S101: The base station determines whether a Hybrid Automatic Repeat Request (HARQ) fed back by the user terminal (UE) is obtained at the time of acquiring the uplink feedback information.

Specifically, in the present invention, the base station may receive the information fed back by the UE at the time of the uplink feedback information, and may not receive the information fed back by the UE. When the base station receives the information fed back by the UE, the base station determines whether the received information is HARQ. When the information is HARQ, the subsequent steps are performed; otherwise, the process of determining the PDCCH resource is not performed.

S102: When receiving the HARQ fed back by the UE as an Acknowledgement (ACK) or a Negative Acknowledgement (NACK), and the ACK or NACK feedback corresponds to the current control channel power of the UE and the CCE aggregation degree of the control channel unit, At least one of control channel power and CCE aggregation degree of the UE is lowered.

In the present invention, different resource determining processes are used for whether the HARQ information is ACK, NACK information, or whether it is DTX.

When the HARQ information is ACK or NACK information, the control channel function of the UE is lowered. At least one of the rate and the CCE aggregation degree includes: determining whether the current time is a CCE aggregation degree adjustment point; when determining that the current CCE aggregation degree adjustment point is, the CCE aggregation degree of the UE is lowered and the control channel power is compensated,

When it is judged that the current power adjustment point is, the control channel power of the UE is lowered.

S103: Discontinuous transmission (Discontinuous Transmission, when receiving feedback from the UE)

DTX), and when the DTX feedback corresponds to the control channel power and the CCE aggregation degree of the UE, at least one of the control channel power and the CCE aggregation degree of the UE is raised.

When the HARQ information is DTX, at least one of up-regulating the control channel power and the CCE aggregation degree of the UE includes:

Determine whether the current time is a CCE aggregation degree adjustment point;

When the CCE aggregation degree adjustment point is determined, the CCE aggregation degree of the UE is raised, and the control channel power is adjusted according to the enable switch. When the enable switch is enabled, the control channel power is raised.

When it is determined that the current power adjustment point is, the control channel power of the UE is raised.

In addition, in the embodiment of the present invention, when the base station receives the ACK or NACK information sent by the UE, the base station considers that the UE has received the information that it sends at the downlink scheduling time, indicating that the power of the UE control channel and the aggregation of the CCE at this time. The degree can ensure the transmission of data. In order to effectively utilize resources, the base station lowers at least one of the control channel power of the UE and the CCE aggregation degree under the guarantee of the transmission performance of the PDCCH. At the same time, when the base station receives the DTX sent by the UE, the base station considers that the UE does not receive the information that is sent by the UE at the time of the downlink scheduling, indicating that the transmission performance of the PDCCH cannot be guaranteed at this time, and the control channel power of the UE and the degree of aggregation of the CCE need to be adjusted. At least one.

When determining whether to adjust at least one of the control channel power and the CCE aggregation degree of the UE, it is further determined whether the ACK/NACK information or the DTX information corresponds to the current control channel power of the UE and the CCE aggregation degree. In the embodiment of the present invention, the control channel power adjustment point and the CCE aggregation degree adjustment point are set. When the current time is the CCE aggregation degree adjustment point and a certain condition is met, the CCE aggregation degree and the control channel power are adjusted. When the current time is the control channel power adjustment point, the control channel power of the UE is adjusted.

FIG. 2 is a schematic diagram of a detailed process for determining the PDCCH resource according to an embodiment of the present invention, where the process includes the following steps:

S201: The base station determines whether the hybrid automatic repeat request HARQ fed back by the user terminal UE is acquired at the time of acquiring the uplink feedback information. If the determination result is yes, the process proceeds to step S202. Otherwise, the process proceeds to step S209.

S202: Determine whether the HARQ is ACK (or NACK) or DTX. When the HARQ is ACK or NACK, go to step S203. When the HARQ is DTX, go to step S206.

S203: When receiving the HARQ fed back by the UE as an ACK or a NACK, determining whether the current time is a CCE aggregation degree adjustment point, when the determination result is yes, proceeding to step S204, when the current time is a power adjustment point, proceeding to step S205, otherwise, Go to step S209.

S204: Downgrade the CCE aggregation degree of the UE and compensate the control channel power.

Specifically, in the present invention, lowering the CCE aggregation degree of the UE and compensating for the control channel power includes:

Determining whether the current control channel power of the UE is less than a set first power threshold, and the current CCE aggregation degree of the UE is within a CCE aggregation degree range corresponding to the first power threshold; when the control channel power of the UE is less than a setting If the current CCE aggregation degree of the UE is within the CCE aggregation degree range corresponding to the first power threshold, the CCE statistic is adjusted to adjust the current CCE statistic corresponding to the set non-DTX. The sum of the step sizes; determining whether the adjusted CCE statistic is not greater than the set CCE aggregation degree threshold; if the adjusted CCE statistic is not greater than the set CCE aggregation degree threshold, Then gather CCE The degree of convergence is adjusted to half of the current CCE aggregation degree, and the CCE statistics are reset, and the adjusted CCE aggregation degree of the UE is finally determined according to the current power of the UE; and the power compensation corresponding to the CCE aggregation degree is lowered according to the setting. The step size compensates the control channel power of the UE.

S205: Lower the control channel power of the UE.

Downgrading the control channel power of the UE includes: down-regulating the control channel power of the UE according to the adjusted step size of the power.

S206: When receiving the feedback of the UE, the intermittent transmission DTX, determining whether the current time is the CCE aggregation degree adjustment point, when the determination result is yes, proceeding to step S207, when the current time is the power adjustment point, proceeding to step S208, Otherwise, step S209 is performed.

S207: Upregulate the CCE aggregation degree of the UE and determine whether to perform control channel power adjustment. Specifically, in the present invention, the CCE aggregation degree of the UE is adjusted and the control channel power is adjusted:

Determining whether the current control channel power of the UE is greater than a set second power threshold, and the current CCE aggregation degree of the UE is within a CCE aggregation degree range corresponding to the second power threshold; when the control channel power of the UE is greater than a setting If the current CCE aggregation degree of the UE is within the CCE aggregation degree range corresponding to the second power threshold, the CCE statistic is adjusted to an adjustment step corresponding to the current CCE statistic and the set DTX. And determining whether the adjusted CCE statistic is greater than a set CCE aggregation degree threshold; if the adjusted CCE statistic is greater than a set CCE aggregation degree threshold, the CCE is The aggregation degree is adjusted to be twice the current CCE aggregation degree, and the CCE statistics are reset, and the adjusted CCE aggregation degree of the UE is finally determined according to the current power of the UE. According to whether the enable switch is enabled, it is determined whether The power adjustment is performed. When the enable switch is enabled, the control channel power of the UE is adjusted according to the set power compensation step size corresponding to the CCE aggregation degree.

S208: Upregulate the control channel power of the UE.

Up-regulating the control channel power of the UE includes: increasing the step according to the set power adjustment The control channel power of the UE.

S209: The determination of the PDCCH resource is not performed.

The following description will be made in conjunction with specific embodiments. In the embodiment of the present invention, in order to constrain the power dynamic range of the RE of the PDCCH, the power relative to the cell reference signal (Reference Signals, RS) is: [D2_MIN, D2_MAX] dB. And the power threshold D2 ( i ) is set for the UE, and the value of i ranges from 1 to 3 integers. Set the CCE aggregation degree threshold for each power point, the CCE aggregation degree L (0) ~ L ( 1 ) corresponding to the D2 ( 1 ) power point, and the CCE aggregation degree L ( 1 ) ~ L corresponding to the D2 (2) power ( 2 ), D2 (3) power corresponds to the CCE set degree L ( 2 ) ~ L ( 3 ), where L ( i ) is less than L ( i +1 ), L (i) has a value range of { 1 , 2, 4 , 8 } , D2( i ) has a value range of [D2—MIN, D2—MAX], and D2 ( i ) is less than D2 ( i+1 ).

The base station determines that the current time is the uplink (UL) feedback information acquisition time, determines whether the HARQ fed back by the UE is acquired at the uplink feedback information acquisition time, and determines the PDCCH resource for each UE that feeds back the HARQ.

If the HARQ fed back by the UE is an ACK or a NACK, and the current control channel power of the UE _, and the CCE aggregation degree L _CCE , corresponding to the current control channel power of the UE and the CCE aggregation degree, it is determined that the CCE needs to be aggregated. The degree and control channel power are adjusted, or only the control channel power is adjusted.

When the current time is the CCE aggregation degree adjustment point, since the base station sets the power threshold D2 (i) for the UE, and the power of the reference signal is also known, in addition, the step size of the power adjustment is set in the present invention ^P _s ^d : ⁿ , so the first power threshold set in the present invention can be expressed as P _RS +O2 ( i) - P -, and whether the judgment is made for different power points i is smaller than the first power threshold (

And, according to the value of the current i, determine whether the CCE aggregation degree L _CCE is within the range of the CCE aggregation degree corresponding to the first power threshold, that is, judge (L (i -1 ) < L _CCE , <= L ( i )). Where Δ / ^ Γ " = f (BLER _t ) , the BLER target value of the control channel is BLER _t .

When the current control channel power of the UE is 3⁄4 · < ( P _RS + D2 ( i ) - AP _s " ), and the UE _CCE of CCE aggregation level L, to satisfy (L (i -1) <L CCE, <= L (i)) , the CCE is adjusted statistics _ACCE,;, the _ACCE,; adjusted to the current statistics ACCE, _CCE; and setting The sum of the adjustment steps of the non-DTX, ie ACCE _; = ACCEi

According to the adjusted CCE statistic ACCE _; , the ACCE is judged _; whether it is not greater than the set CCE aggregation degree threshold, wherein the set CCE aggregation degree threshold is Thrl, that is, whether the ACCEi is not greater than Thrl, when ACCEi <=Thrl, adjust the CCE aggregation degree L _CCE _ to half of the current CCE polymerization degree L _CCE , ie _CE , = L _CCE , /2, then CCE statistic ACCE 0

Thereafter, when another UE according to the current control channel power, the UE finally determines the degree of polymerization adjusted, when the UE is currently determined power control channel _-; and equal, i.e. _{_{-; = = P RS + D2}} (i), the The adjusted CCE aggregation degree _Ε is max ( L ( i -1 ), L _CCE _, ) _0. When performing power adjustment, firstly, according to the power compensation step size corresponding to the CCE aggregation degree, the current UE is controlled. The channel power is compensated, and the control channel power of the compensated UE is the power compensation step size corresponding to the current UE control channel power and the downward adjustment CCE aggregation degree = after P'^ Pu + C:: The control channel power of the UE is determined, wherein the limitation of the UE is the restriction information determined according to different UEs, for example, the restriction information determined according to different UE types, and the control channel power of the adjusted UE is determined to be max ( Min ( P _RS +D2_MAX , P' _{UE i} ), P _RS +D2_MIN )

In addition, in the present invention, if a level is adjusted under the CCE aggregation degree, the power compensation is set to |J|,|

, J τ3⁄4

The control channel power of the UE adjusted _-; as, ·, _CCE of CCE aggregation level L after adjustment, L, this time base pairs of the current control channel power should UE CCE aggregation level and for an update, in order to determine the subsequent PDCCH resource When used.

When the current time is the control channel power adjustment point, only the control channel power of the UE is performed. To adjust, firstly, according to the set power step ΔST", the control channel power of the UE is adjusted for the first time, and the power of the first adjusted control channel is the current control channel power of the UE and the set power. The sum of the adjusted step sizes. Then, according to max( min ( P _RS +D2_MAX , P _VE _i ), P _RS +D ² _MIN), the adjusted control channel power of the UE is determined.

_{min (P RS + D2_MAX, Ρ} υΕ _ {), P RS + D2_MIN), and CCE aggregation level held constant.

The control channel power of the UE adjusted _-; of Ρ '^ -, ·, adjusted _CCE of CCE aggregation level L -, is L, the base station stored in itself at this time the UE control channel _power; and a CCE aggregation level L _CCE — is updated for use in subsequent PDCCH resource determination.

When the base station determines that the UE a HARQ feedback to the DTX, the UE and the current power control channel _-; _CCE and CCE aggregation level L -, power control channel corresponding to the CCE aggregation level and the UE to save its current base station are the same, the need Increasing at least one of a control channel power and a CCE aggregation degree of the UE.

When the current time is the CCE aggregation degree adjustment point, since the base station sets the power threshold D2 (i) for the UE, and the power of the reference signal is also known, in addition, in the present invention, the step Δ of the power adjustment is set, so The second power threshold set in the invention can be expressed as ^+D2 (i) - Δ / . Determining whether the power point i is different from the second power threshold (P _RS +D2(i)-AP: _p ), and determining whether the CCE aggregation degree L _CCE is located in the second according to the current value of i The power threshold corresponds to the range of CCE aggregation degrees, that is, the judgment (L ( i -1 )

<= ^L CCE , <L ( i ) ).

When the current control channel power of the UE is 3⁄4 ·> ( P _RS +O2 ( i ) -APZ ), and the CCE aggregation degree of the UE is L _CCE , it satisfies ( L( i -1 )<=L _CCE , < L( i ) ), the CCE is adjusted statistics _ACCE,;, the _ACCE,; CCE adjusted to the current statistics to the set ΔCCE _i DTX step size corresponding to the sum, i.e.,

According to the adjusted CCE statistic ACCE _; The ACCE, _read; CCE aggregation level is greater than the increase threshold value is set, wherein the set of CCE aggregation level up to the threshold value Thr, ACCE, i.e. _{determination;} is greater than Thr, as _ACCE,; when> Thr, then the CCE The degree of aggregation _Ε- , adjusted to the current CCE aggregation degree L _CCE — , twice, that is, _E — , =, after determining the aggregation degree of the adjusted UE according to the current control channel power of the UE, when determining the UE the current control channel power _-; equal to ^ + D2 (i), i.e. _{_{-; = = P RS + D2}} (i), the CCE aggregation level adjusted _Ε, is min (L (i), L CCE _ , ) ₀

Moreover, in the present invention, if the CCE aggregation degree is adjusted by one level, the power compensation is set to

P, Bay ¹ ] need, / 禹 N N + 尸, Because 匕 _ _ N; N table TF ^ † 邻邻邻邻性能。。。性能性能性能性能性能性能Whether to enable the power compensation enable switch when adjusting on the CCE, 1 enable, 0 is not enabled.

When performing power adjustment, firstly, according to whether the enable switch for performing power compensation is enabled, that is, whether w is enabled or not, the CCE is adjusted according to the setting.

Power control channel to compensate for the current UE, the UE control channel power compensated ^ _-; and regulated power after the control channel corresponding to the CCE aggregation level power compensation step length = the current UE, after a PRJ p p p Shang, The control channel power of the adjusted UE is determined according to the limitation of the UE, where the limitation of the UE is the restriction information determined according to different UEs, for example, the restriction information determined according to different UE types, and the control of the adjusted UE is determined. The channel power '^— is , max(min ( P _RS +D2_MAX , P' _UE ”), P _RS +D2_MIN), that is, the adjusted control channel power P ′ of the UE at this time, the adjusted CCE aggregation degree L _CCE , = L _CCE __ . When the power-compensation enable switch is not enabled, and P ^c d- _{E e} is 0, the control channel power adjustment is not performed, and the control channel power of the UE is _; and the adjusted CCE is aggregated. The degree of convergence L _CCE — = L _CCE _ When the current time is the control channel power adjustment point, only the control channel power of the UE is adjusted. First, according to the set power adjustment step Δ, the control channel power of the UE is performed. For the first adjustment, the first adjusted control channel power is the sum of the current UE control channel power and the set power adjustment step, and then according to max( min ( P _RS +D2_MAX, P' _{UE i} ) , P _RS+ D ² _MIN) determines the control channel power of the adjusted UE Ρ '^ — , · , that is, Ρ '^ — , ·= max(min ( P _RS +D2_MAX , P' _{UE i} ,, P _RS +D2_MIN), and keep the CCE aggregation constant.

The control channel power of the UE adjusted _-; of Ρ '^, CCE L _CCE polymerization degree, remains unchanged, this time base pairs of the current control channel power should UE and updates the CCE aggregation level, in order to determine when a subsequent PDCCH resource use.

According to the above method, the control channel power and the CCE aggregation degree of each UE are adjusted. Specifically, in the embodiment of the present invention, the power dynamic range of the RE of the PDCCH is constrained, relative to the power of the cell RS: [D2_MIN, D2_MAX] dB. Set two power thresholds D2' and D2" to the user (D2' and D2" are the values determined by the simulation or strategy), and the CCE aggregation degree threshold. For the D2' corresponding CCE aggregation degree 1~L1 adjusted power point, for D2 "The power point corresponding to the CCE aggregation degree L1-L2 adjustment. The value range of the power difference adjustment of the UE [D2_MIN, D2_MAX], that is, the power value range: [ +ϋ ² _ΜΙΝ, /^+ϋ ² _ΜΑΧ]

Moreover, in the embodiment of the present invention, if the CCE aggregation degree is adjusted by one level, the power compensation is P, the shell ¹ ] needs to satisfy 2+P, and the ^P country 2; ^ the degree of CCE aggregation adjustment For one level, set the power compensation to two " _te ", then you need to meet

One p one

One person

When the HARQ acquired by the base station is ACK or NACK, and the HARQ information corresponds to the

The control channel power of the UE _, and the CCE aggregation degree L _CCE , the ACK or NACK information, need to reduce at least one of the control channel power and the CCE aggregation degree of the UE.

When the current time is the CCE aggregation degree adjustment point, there are two power adjustment points of the UE: P _RS +D2' , 1~L1; P _RS +D2" , L1-L2, first when - _; <+D2'- ΔΡ and 1<L _CCE , _<= L1, or — _; <^+D2"- When AP and L1 < L _CCE , <= L2, adjust the CCE statistic ACCE,., adjust the ACCE _; to the current CCE statistic ACCE _; and the adjusted non-DTX corresponding adjustment step size AgL, that is, ACCE _; = ACCE _i+ A^ ^c _D ^E _m . In the present invention

_J BLER, ' AP ,

^7 = _{η Ώΐ π} , the BLER target value of the control channel is SLER. According to the adjusted CCE statistic ACCE _; , the ACCE is judged _; whether it is not greater than the set downward CCE aggregation degree threshold Thrl, and when ACCE <=Thrl, the CCE polymerization degree L _CCE _ is adjusted to the current Half of CCE polymerization degree L _CCE , ie ! ^ _E , = L _CCE , /2.

Thereafter, the UE determines the current power control channel _-; equal to the + D2 ', adjust the CCE aggregation level _{E, = max (l, L} CCE _,), if the UE determines the current power control channel _-; and ^ When +D2" is equal, the adjusted CCE polymerization degree I^ _E , = max (LI, L _CCE _, )

When the power adjustment is performed, the control channel power of the current UE is compensated according to the power compensation step size P ^c _c =: corresponding to the CCE aggregation degree, and the compensated UE's control channel spleen is compensated.

+ pCc:: Then, according to the limitation of the UE, determine the control channel power of the adjusted UE, and determine the control channel power of the adjusted UE Ρ '^ — , = max( min ( P _RS+ D2_MAX , P' _UEJ ), P _RS+ D2_MIN) _o

Then, the adjusted control channel power of the UE at this time - _; = '^ - , · , the adjusted CCE aggregation degree L _CCE , = lJ _ra , , the control channel power of the UE saved by the base station at this time _; and CCE The degree of aggregation L _CCE — is updated for use in subsequent PDCCH resource determination.

When the current time is the control channel power adjustment point, only the control channel power of the UE is adjusted. First, the control channel power of the UE is first adjusted according to the set power adjustment step, the first adjustment. After the control channel power _; = Ρ _υΕ — :. Then, according to max( min ( P _RS +D2_MAX , P _{UE i} ), /^+ϋ ² _ΜΙΝ), the adjusted UE is determined. The control channel power Ρ'^, that is, Ρ'^ =max( min ( P _RS +D2_MAX , Ρ' _{υΕ ί} ) , P _RS+ D2_MIN), and keep the CCE polymerization degree unchanged.

The UE control channel power adjusted _-; of Ρ '^ -, ·, CCE L _CCE polymerization degree adjusted, remains unchanged, this time the base station of the UE stored in itself for the power control channel _-; CCE aggregation level, and L _CCE — , is updated for use in subsequent PDCCH resource determination.

When the base station determines that the UE DTX of HARQ feedback, and the current control channel power should DTX feedback on the UE _-; _CCE and CCE aggregation level L, when the DTX feedback necessary to increase the control channel power CCE aggregation level and the UE at least One.

When the current time is the CCE aggregation degree adjustment point, there are two power adjustment points of the UE: P _RS +D2' , 1~L1; P _RS +D2" , L1~ L2, first when - !·〉 +D2'- A , and 1 <= L _CCE , < L1 , or _; 〉 ^ + ϋ 2 " - Δ / ^ , and L1 < = L _CCE , < L2 , adjust the CCE statistic ACCE _; , adjust the ACCEi to ACCE _; = ACCE _t .

According to the adjusted CCE statistic ACCE _; , the ACCE is judged _; whether it is greater than the set CCE polymerization degree threshold Thr, and when ACCE^Thr, the CCE polymerization degree _{Ε is} adjusted to the current CCE polymerization degree L _CCE , 2 times, ie, =L _CCE , *2.

Thereafter, the UE determines the current power control channel _-; equal to the + D2 ', is adjusted (polymerization degree 5 ^ 1 ^, = 1 ^ 11 ( 1 ^, L CCE _,), if the UE determines the current control Channel power— _; when equal to ^ + D2", the adjusted CCE aggregation degree I^ _E , =min (L2, L _CCE _, ) ₀

When performing power adjustment, first determine whether the enable switch for power compensation is enabled, that is, whether =^- _£ „ _fl3⁄4fe is 1, and when the corpse = ^ =1, according to the set upward adjustment CCE polymerization degree corresponding The power compensation step size = , the current control channel power of the UE is compensated, and the compensated UE's control channel power ^— _; = — _; + = L _te .

After that, the control channel power of the adjusted UE is determined according to the limitation of the UE, and the control channel power of the adjusted UE is determined.

Min ( P _RS +D2_MAX , P' _{UE i} ), P _RS +D2_MIN), that is, the control channel power of the adjusted UE at this time - _; = ^ _£ - the adjusted CCE aggregation degree L _CCE — , =i: _ccE ,.

When the enable switch for power compensation is not enabled, P ^c _c i _sate — _Enable is 0, then no control channel power adjustment is performed, and the control channel power of the UE is _; , the adjusted CCE aggregation degree L _CCE ”. = L _CCE — , .

When the current time is the control channel power adjustment point, only the control channel power of the UE is adjusted, and the control channel power of the UE is first adjusted according to the set power adjustment step Δ, the first Sub-adjusted control channel power _; = P _UE _i + Δ ₅ - , then determine the adjusted UE's control channel power P' according to max( min ( P _RS + D2_MAX , P' _{UE i} ), /^+ϋ2_ΜΙΝ) — ,· , that is, P′ — ,·= max( min ( P _RS +D2_MAX , P _UE _t ), P _RS+ D2_MIN), and keep the CCE aggregation degree unchanged.

FIG. 3 is a schematic structural diagram of a device for determining a physical downlink control channel PDCCH resource according to the present disclosure, where the device includes:

The determining module 31 is configured to determine whether the hybrid automatic repeat request HARQ fed back by the user terminal UE is obtained at the time of acquiring the uplink feedback information;

The first adjustment module 32 is configured to: when the HARQ fed back by the UE is an acknowledgement acknowledgement ACK or a negative acknowledgement NACK, and the ACK or NACK feedback corresponds to the current control channel power of the UE and the CCE aggregation degree of the control channel unit, the UE is down-regulated At least one of control channel power and CCE aggregation degree;

The second adjustment module 33 is configured to: when the HARQ received by the UE is received to continue to transmit DTX, and the DTX feedback corresponds to the control channel power and the CCE aggregation degree of the UE, the control channel power and the CCE aggregation degree of the UE are adjusted upward. At least one.

The first adjustment module 32 is specifically configured to determine whether the current time is a CCE aggregation degree adjustment point; when determining that the current power adjustment point corresponding to the CCE aggregation degree, the CCE aggregation degree of the UE is lowered and the control channel power is compensated. When the current power adjustment point is judged, the The control channel power of the UE.

The first adjustment module 32 is specifically configured to determine whether the current control channel power of the UE is less than the set first power threshold, and the current CCE aggregation degree of the UE is within the CCE aggregation interval corresponding to the first power threshold. When the control channel power of the UE is less than the set first power threshold, and the current CCE aggregation degree of the UE is within the CCE aggregation degree range corresponding to the first power threshold, the CCE statistic is adjusted to the current CCE. The sum of the statistic and the set non-DTX adjustment step; whether the adjusted CCE statistic is not greater than the set CCE aggregation degree threshold; when the adjusted CCE statistic is not greater than When the CCE aggregation degree threshold is lowered, the CCE aggregation degree is adjusted to be half of the current CCE aggregation degree, and the adjusted CCE aggregation degree of the UE is determined according to the current power of the UE; The power compensation step size corresponding to the degree of aggregation compensates the control channel power of the UE.

The first adjustment module 32 is specifically configured to down-regulate the control channel power of the UE according to the step size adjusted under the set power.

The second adjustment module 33 is specifically configured to determine whether the current time is a CCE aggregation degree adjustment point. When it is determined that the current power adjustment point is the CCE aggregation degree, the CCE aggregation degree of the UE is raised and determined according to the enable switch. The control channel power is adjusted. When the enable switch is enabled, the control channel power is adjusted. When it is determined that the power adjustment point is currently, the control channel power of the UE is adjusted.

The second adjustment module 33 is specifically configured to determine whether the current control channel power of the UE is greater than the set second power threshold, and the current CCE aggregation degree of the UE is within the CCE aggregation interval corresponding to the second power threshold. When the control channel power of the UE is greater than the set second power threshold, and the current CCE aggregation degree of the UE is within the CCE aggregation degree range corresponding to the second power threshold, the CCE statistic is adjusted to the current CCE. The sum of the adjustment step size corresponding to the set DTX; determining whether the adjusted CCE statistic is greater than the set upward CCE aggregation degree threshold; when the adjusted CCE statistic is greater than the set upward adjustment CCE When the aggregation threshold is set, the CCE aggregation degree is adjusted to twice the current CCE aggregation degree, and the adjusted CCE aggregation degree of the UE is determined according to the current power of the UE; and when the enable switch is enabled, Adjusting the control channel power of the UE according to the set power compensation step size corresponding to the CCE aggregation degree.

The second adjustment module 33 is specifically configured to: adjust the control channel power of the UE according to the step size of the set power adjustment.

Specifically, the device may be located in a base station.

In the embodiment of the present invention, according to whether the UE receives the information sent by the base station, the control channel power and the CCE aggregation degree of the UE are adjusted. When receiving the ACK or NACK fed back by the UE, the UE is considered to have received the information sent by the base station. The power of the control channel and the CCE aggregation degree of the UE are lowered. When the DTX is fed back by the UE, it is considered that the UE does not receive the information sent by the base station, and the power of the control channel and the CCE aggregation degree of the UE need to be adjusted to ensure the control channel power and the CCE. The rationality of the degree of polymerization adjustment, as well as the accuracy.

The above description shows and describes a preferred embodiment of the present invention, but as described above, it should be understood that the present invention is not limited to the forms disclosed herein, and should not be construed as Other combinations, modifications, and environments are possible and can be modified by the teachings or related art or knowledge within the scope of the inventive concept described herein. All changes and modifications made by those skilled in the art are intended to be within the scope of the appended claims.

Claims

Claim

A method for determining a PDCCH resource of a physical downlink control channel, where the method includes:

The base station acquires the hybrid automatic repeat request HARQ fed back by the user terminal UE at the time of the uplink feedback information acquisition;

2. The method according to claim 1, wherein the down-regulating at least one of control channel power and CCE aggregation degree of the UE is:

3. The method according to claim 2, wherein the down-regulating the CCE aggregation degree of the UE and compensating for the control channel power is:

Determining whether the current control channel power of the UE is less than the set first power threshold, and whether the current CCE aggregation degree of the UE is within the CCE aggregation degree range corresponding to the first power threshold, when the control channel power of the UE is less than When the current CCE aggregation degree is within the CCE aggregation degree range corresponding to the first power threshold, the CCE statistic is adjusted to correspond to the current non-DTX corresponding to the set CCE statistic. Adjust the sum of the steps; And determining whether the adjusted CCE statistic is not greater than the set CCE aggregation degree threshold. When the adjusted CCE statistic is not greater than the set CCE aggregation degree threshold, the CCE aggregation degree is determined. Adjusting to the current CCE aggregation degree, and determining the adjusted CCE aggregation degree of the UE according to the current control channel power of the UE;

The control channel power of the UE is compensated according to the set power compensation step size corresponding to the CCE aggregation degree.

4. The method according to claim 2, wherein the down regulating the control channel power of the UE comprises:

The method according to claim 1, wherein the up-regulating at least one of control channel power and CCE aggregation degree of the UE includes:

The method according to claim 5, wherein the up-regulating the control channel power and the CCE aggregation degree of the UE includes:

The method according to claim 5, wherein the up regulating the control channel power of the UE comprises:

8. A device for determining a PDCCH resource of a physical downlink control channel, where the device includes:

The determining module is configured to determine whether the hybrid automatic repeat request HARQ fed back by the user terminal UE is obtained at the time of acquiring the uplink feedback information;

The device according to claim 8, wherein the first adjustment module is specifically configured to determine whether the current time is a CCE aggregation degree adjustment point; when it is determined that the current CCE aggregation degree adjustment point is, the CCE of the UE is lowered. The degree of aggregation compensates for the control channel power. When it is determined that the current power adjustment point is, the control channel power of the UE is lowered.

The device according to claim 9, wherein the first adjustment module is specifically configured to determine whether the current control channel power of the UE is less than a set first power threshold, and whether the current CCE aggregation degree of the UE is located. The CCE aggregation degree range corresponding to the first power threshold When the control channel power of the UE is less than the set first power threshold, and the current CCE aggregation degree of the UE is within the CCE aggregation degree range corresponding to the first power threshold, the CCE statistic is adjusted to the current The sum of the CCE statistic and the set non-DTX adjustment step; whether the adjusted CCE statistic is not greater than the set CCE aggregation degree threshold; when the adjusted CCE statistic is not greater than When the CCE aggregation degree threshold is set, the CCE aggregation degree is adjusted to be half of the current CCE aggregation degree, and the adjusted CCE aggregation degree of the UE is determined according to the current power of the UE; The power compensation step size corresponding to the CCE aggregation degree compensates the control channel power of the UE.

The device according to claim 9, wherein the first adjustment module is specifically configured to down-regulate the control channel power of the UE according to the step size adjusted under the set power.

The apparatus according to claim 8, wherein the second adjustment module is specifically configured to determine whether the current time is a CCE aggregation degree adjustment point; when determining that the current power adjustment point corresponding to the CCE aggregation degree is raised, The CCE aggregation degree of the UE is determined according to the enable switch to determine whether to adjust the control channel power. When the enable switch is enabled, the control channel power is raised, and when it is determined that the power adjustment point is currently, the control channel power of the UE is raised.

The device according to claim 12, wherein the second adjustment module is specifically configured to determine whether the current control channel power of the UE is greater than a set second power threshold, and whether the current CCE aggregation degree of the UE is located. The CCE aggregation degree range corresponding to the second power threshold is greater than the set second power threshold, and the current CCE aggregation degree of the UE is located in the CCE aggregation interval corresponding to the second power threshold. If the range is within the range, the CCE statistic is adjusted to the sum of the current CCE statistic and the set DTX corresponding to the set DTX; whether the adjusted CCE statistic is greater than the set CCE aggregation degree threshold; When the adjusted CCE statistic is greater than the set CCE aggregation degree threshold, the CCE aggregation degree is adjusted to twice the current CCE aggregation degree, and the adjusted UE is determined according to the current power of the UE. CCE polymerization degree; and when the enable switch is enabled, the CCE is adjusted according to the setting The power compensation step size corresponding to the degree of aggregation adjusts the control channel power of the UE.

The device according to claim 12, wherein the second adjustment module is specifically configured to: adjust a control channel power of the UE according to a step size of the set power adjustment.