WO2012155735A1 - Procédé et dispositif permettant de déterminer une ressource de canal de commande de liaison descendante physique - Google Patents

Procédé et dispositif permettant de déterminer une ressource de canal de commande de liaison descendante physique Download PDF

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Publication number
WO2012155735A1
WO2012155735A1 PCT/CN2012/074030 CN2012074030W WO2012155735A1 WO 2012155735 A1 WO2012155735 A1 WO 2012155735A1 CN 2012074030 W CN2012074030 W CN 2012074030W WO 2012155735 A1 WO2012155735 A1 WO 2012155735A1
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Prior art keywords
control channel
cce aggregation
aggregation degree
power
cce
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PCT/CN2012/074030
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English (en)
Chinese (zh)
Inventor
闫金凤
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中兴通讯股份有限公司
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Priority to JP2014520501A priority Critical patent/JP5735178B2/ja
Publication of WO2012155735A1 publication Critical patent/WO2012155735A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607—Details of the supervisory signal
    • H04L1/1621—Group acknowledgement, i.e. the acknowledgement message defining a range of identifiers, e.g. of sequence numbers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1825—Adaptation of specific ARQ protocol parameters according to transmission conditions
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/06—TPC algorithms
    • H04W52/14—Separate analysis of uplink or downlink
    • H04W52/146—Uplink power control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/30—TPC using constraints in the total amount of available transmission power
    • H04W52/32—TPC of broadcast or control channels
    • H04W52/325—Power control of control or pilot channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/38—TPC being performed in particular situations
    • H04W52/48—TPC being performed in particular situations during retransmission after error or non-acknowledgment

Definitions

  • 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.
  • PDCCH Physical Downlink Control Channel
  • 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).
  • DCI Downlink Control Information
  • various DCI format types sent to the UE are carried in the PDCCH for transmission.
  • 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 Orthogonal Frequency Division Multiplexing
  • 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.
  • QPSK Quadrature Phase Shift Keying
  • 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.
  • CQI Channel Quality Indicator
  • 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.
  • 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.
  • 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.
  • 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;
  • the base station 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.
  • the CCE aggregation degree of the UE is lowered and the control channel power is compensated.
  • 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.
  • 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 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 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;
  • the CCE aggregation degree of the UE is raised and the control channel power is adjusted according to the enable switch.
  • the enable switch is enabled, the control channel power is raised.
  • 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:
  • 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.
  • 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;
  • 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;
  • HARQ hybrid automatic repeat request
  • 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.
  • the CCE statistic is adjusted to the current CCE.
  • 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.
  • the CCE statistics are adjusted to the current CCE.
  • 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.
  • the control channel power and the CCE aggregation degree of the UE are adjusted.
  • 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.
  • the power of the control channel and the CCE aggregation degree of the UE need to be adjusted to ensure the control channel power.
  • 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 embodiment of the present invention provides a method and a device for determining PDCCH resources.
  • 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:
  • 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.
  • HARQ Hybrid Automatic Repeat Request
  • 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.
  • the base station determines whether the received 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.
  • ACK Acknowledgement
  • NACK Negative Acknowledgement
  • different resource determining processes are used for whether the HARQ information is ACK, NACK information, or whether it is DTX.
  • 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,
  • the control channel power of the UE is lowered.
  • 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.
  • At least one of up-regulating the control channel power and the CCE aggregation degree of the UE includes:
  • the 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.
  • the control channel power of the UE is raised.
  • the base station 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.
  • 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.
  • the base station 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.
  • the control channel power adjustment point and the CCE aggregation degree adjustment point are set.
  • 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.
  • 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:
  • step 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.
  • step S202 Determine whether the HARQ is ACK (or NACK) or DTX.
  • the HARQ is ACK or NACK, go to step S203.
  • the HARQ is DTX, go to step S206.
  • step 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.
  • lowering the CCE aggregation degree of the UE and compensating for the control channel power includes:
  • the step size compensates 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.
  • step 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:
  • 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.
  • the enable switch it is determined whether The power adjustment is performed.
  • 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.
  • the power relative to the cell reference signal is: [D2_MIN, D2_MAX] dB.
  • the power threshold D2 ( i ) is set for the UE, and the value of i ranges from 1 to 3 integers.
  • 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.
  • UL uplink
  • the HARQ fed back by the UE is an ACK or a NACK
  • 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
  • the degree and control channel power are adjusted, or only the control channel power is adjusted.
  • ⁇ / ⁇ ⁇ " f (BLER t )
  • the BLER target value of the control channel is BLER t .
  • the UE When performing power adjustment, firstly, according to the power compensation step size corresponding to the CCE aggregation degree, the current UE is controlled.
  • 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 )
  • the power compensation is set to
  • 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.
  • 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, ⁇ ⁇ _ ⁇ ), P RS + D2_MIN), and CCE aggregation level held constant.
  • the control channel power of the UE adjusted -; of ⁇ ' ⁇ -, ⁇ , 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.
  • 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.
  • the step ⁇ of the power adjustment is set, so
  • the second power threshold set in the invention can be expressed as ⁇ +D2 (i) - ⁇ / . 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 )
  • the CCE is adjusted statistics ACCE,;, the ACCE,; CCE adjusted to the current statistics to the set ⁇ CCE 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.
  • the power compensation is set to
  • 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 _
  • the current time is the control channel power adjustment point, only the control channel power of the UE is adjusted.
  • the control channel power of the UE is performed.
  • the control channel power of the UE adjusted -; of ⁇ ' ⁇ , 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.
  • the control channel power and the CCE aggregation degree of each UE are adjusted.
  • 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 are the values determined by the simulation or strategy), and the CCE aggregation degree threshold.
  • 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: [ + ⁇ 2 _ ⁇ , / ⁇ + ⁇ 2 _ ⁇ ]
  • 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
  • the HARQ acquired by the base station is ACK or NACK
  • the HARQ information corresponds to the
  • the BLER target value of the control channel is SLER.
  • the adjusted CCE polymerization degree I ⁇ E , max (LI, L CCE _, )
  • the degree of aggregation L CCE — is updated for use in subsequent PDCCH resource determination.
  • the UE control channel power adjusted -; of ⁇ ' ⁇ -, ⁇ , 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.
  • 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.
  • 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.
  • 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 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 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.
  • the device may be located in a base station.
  • the control channel power and the CCE aggregation degree of the UE are adjusted.
  • 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.
  • 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.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention se rapporte à un procédé permettant de déterminer une ressource de canal de commande de liaison descendante physique (PDCCH pour Physical Downlink Control CHannel), ledit procédé comprenant les étapes suivantes : une station de base acquiert une demande de répétition automatique hybride (HARQ pour Hybrid Automatic Repeat reQuest) renvoyée par un équipement utilisateur (UE pour User Equipement) pendant l'acquisition d'informations de rétroaction de liaison montante ; lorsque la demande HARQ est un accusé de réception (ACK) ou un accusé de réception négatif (NACK) et que le retour d'ACK ou de NACK correspond à l'actuelle puissance du canal de commande et au niveau d'agrégation d'éléments de canal de commande (CCE pour Control Channel Element) d'unité de canal de commande de l'UE, le procédé réduit la puissance du canal de commande et/ou le niveau d'agrégation d'éléments CCE de l'UE ; lorsque la demande HARQ est une transmission discontinue (DTX) et que le retour de transmission DTX correspond à la puissance du canal de commande et au niveau d'agrégation d'éléments CCE de l'UE, le procédé augmente la puissance du canal de commande et/ou le niveau d'agrégation d'éléments CCE de l'UE. La présente invention se rapporte en outre à un dispositif correspondant permettant de déterminer une ressource de canal PDCCH. Au moyen de la présente invention, le caractère raisonnable et la précision de réglage de la puissance du canal de commande et du niveau d'agrégation d'éléments CCE peuvent être assurés.
PCT/CN2012/074030 2011-07-19 2012-04-13 Procédé et dispositif permettant de déterminer une ressource de canal de commande de liaison descendante physique WO2012155735A1 (fr)

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CN108574558A (zh) * 2017-03-13 2018-09-25 华为技术有限公司 传输控制信息的方法和装置
US11108508B2 (en) * 2016-04-19 2021-08-31 Telefonaktiebolaget Lm Ericsson (Publ) Applying more robust transmission procedure

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CN104168094B (zh) * 2013-05-20 2017-08-11 普天信息技术研究院有限公司 非连续传输检测方法
CN105101104B (zh) * 2014-04-18 2019-01-01 成都鼎桥通信技术有限公司 集群业务中调整cce聚集级别的方法、基站及监听终端
CN110831135B (zh) 2018-08-10 2022-08-26 华为技术有限公司 一种功率控制的方法和装置

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US11108508B2 (en) * 2016-04-19 2021-08-31 Telefonaktiebolaget Lm Ericsson (Publ) Applying more robust transmission procedure
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CN108574558B (zh) * 2017-03-13 2020-08-14 华为技术有限公司 传输控制信息的方法和装置

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