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WO2012167652A1 - Procédé et dispositif de transmission en liaison descendante - Google Patents

Procédé et dispositif de transmission en liaison descendante Download PDF

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Publication number
WO2012167652A1
WO2012167652A1 PCT/CN2012/073338 CN2012073338W WO2012167652A1 WO 2012167652 A1 WO2012167652 A1 WO 2012167652A1 CN 2012073338 W CN2012073338 W CN 2012073338W WO 2012167652 A1 WO2012167652 A1 WO 2012167652A1
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WIPO (PCT)
Prior art keywords
phich
transmission resource
terminal
power
transmission
Prior art date
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PCT/CN2012/073338
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English (en)
Chinese (zh)
Inventor
朱志球
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China Academy of Telecommunications Technology CATT
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China Academy of Telecommunications Technology CATT
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Publication of WO2012167652A1 publication Critical patent/WO2012167652A1/fr
Anticipated expiration legal-status Critical
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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/30—Transmission power control [TPC] using constraints in the total amount of available transmission power
    • H04W52/34—TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading
    • H04W52/346—TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading distributing total power among users or channels
    • 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
    • H04L1/1692—Physical properties of the supervisory signal, e.g. acknowledgement by energy bursts
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/30—Transmission power control [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
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling

Definitions

  • the present invention relates to the field of wireless communications, and in particular, to a downlink transmission method and device. Background technique
  • LTE Long Term Evolution
  • ACK/NACK positive acknowledgement/negative acknowledgement
  • PHICH physical hybrid-ARQ indicator channel
  • a control region ie, a downlink control region in a downlink subframe is used to transmit a cell-specific reference symbol.
  • CRS Cell-specific reference symbol.
  • PCFICH Physical Control Format Channel
  • PHICH Physical Downlink Control Channel
  • each channel/signal uses resources of the entire downlink control region in a shared manner.
  • the minimum granularity of resource allocation is a Resource Element Group (REG), and each REG includes 4 resource elements (RE), and these REs are CRSs not being used by the local cell.
  • the PHICH transmission resource is mapped to the control region of the downlink subframe.
  • the system PHICH transmission resources are divided into several PHICH groups, and each PHICH group occupies different time-frequency resources.
  • Each PHICH group needs to occupy three REGs in the downlink control region; each PHICH group can carry multiple
  • the ACK/NACK information of the User's Equipment (UE) is code-multiplexed with the ACK/NACK of different UEs in the same PHICH group, and the upper limit of the number of ACK/NACK bits that can be code-multiplexed is determined. Therefore, the yj Seq ⁇ yy of the UE
  • the PHICH transmission resource is identified by a pair of numbers ', where " PHICH is the PHICH group number,” PHICH is an orthogonal sequence number within a group, which is used as a code resource index used by the UE in the group.
  • the specific calculation formula for these two numbers is:
  • DMRS Demodulation Reference Signal
  • V ⁇ is the spreading factor size of PHICH modulation
  • V TM Cff is the number of PHICH groups
  • the PHICH transmission resource location of the UE is determined by the lowest PRB sequence number and the user-level DMRS cyclic shift value among the resources occupied by the PUSCH transmission. Both of these information are given in the corresponding PUSCH scheduling signaling.
  • the corresponding scheduling signaling is transmitted in the PDCCH of the subframe n- K PU CH.
  • the value of KpuscH is 4; for the TDD system, the specific value of KpuscH is also related to the configuration of the uplink and downlink subframes and the specific value of the subframe n, as shown in Table 2 below:
  • the base station side performs uplink scheduling, first all the UEs in the default cell use the same 5, and after completing the PUSCH resource allocation, according to the PUSCH resource allocation result and the initial value, according to the above
  • the formula calculates the location of the PHICH transmission resource. If the PHICH transmission resource conflict is found, the UE attempts to change the PHICH transmission resource location. If the PHICH transmission resource can be allocated, the current UE scheduling succeeds; otherwise, the current UE is not scheduled.
  • the base station determines the transmit power of the corresponding PHICH according to the UE channel condition, so as to ensure the PHICH demodulation performance of the UE side.
  • the PHICH transmission resource allocation scheme only the PHICH transmission resources allocated to the UE in each subframe are not conflicted, and the PHICH reception performance is not considered, but only determined at the corresponding PHICH transmission timing.
  • the transmit power of each UE is easy to cause the dynamic change of the PHICH transmit power to be drastic, the power difference of different UEs in the same PHICH group is very large, and the PHICH transmit power required by the UE cannot be guaranteed due to the base station rated power limitation.
  • the PHICH transmission resource allocation process does not consider whether the power required by the UE can be allocated in the corresponding PHICH transmission subframe.
  • the rated power of the base station is limited, in order to ensure the normal operation of the radio frequency device. It is obvious that the transmission power of each symbol in the downlink control region cannot exceed the rated power of the base station. Therefore, the residual power of the Orthogonal Frequency Division Multiplexing (OFDM) symbol may occur when the PHICH transmission power is allocated to a user.
  • the UE's transmit power request cannot be met. At this time, the PHICH of this time is no longer transmitted, or the transmit power is reduced to ensure that the sum of powers in the symbol does not exceed the rated power of the base station. In both cases, the correct reception of the PHICH cannot be guaranteed. . Summary of the invention
  • the embodiments of the present invention provide a downlink transmission method and device, which are used to solve the problem of how to ensure PHICH reception performance.
  • a downlink transmission method comprising:
  • the base station After the base station allocates the physical uplink shared channel PUSCH transmission resource, the base station determines, according to the downlink channel condition of the terminal, the transmit power required by the terminal to send the physical hybrid automatic request retransmission indication channel PHICH;
  • a downlink transmission device comprising:
  • a power determining unit configured to determine, according to a downlink channel condition of the terminal, a transmit power required to send a physical hybrid automatic request retransmission indication channel (PHICH) according to a downlink channel condition of the terminal; and a requirement determining unit, configured to determine Whether the current remaining power on the resource for transmitting the PHICH satisfies the requirement of the transmit power;
  • PHICH physical hybrid automatic request retransmission indication channel
  • a downlink transmission unit configured to allocate a PHICH transmission resource to the terminal when the requirement determining unit determines to be, and transmit the uplink scheduling signaling of the PUSCH transmission to the terminal, and use the transmit power to transmit through the allocated PHICH.
  • the resource sends a PHICH to the terminal, and when the requirement determining unit determines to be no, the current scheduling of the PUSCH transmission resource of the terminal is abandoned.
  • the base station allocates the PUSCH transmission resource to the terminal, determining, according to the downlink channel condition of the terminal, the transmit power required to send the PHICH to the terminal, and determining whether the transmission can be satisfied according to the current remaining power on the resource used for transmitting the PHICH.
  • the power requirement if yes, allocates a PHICH transmission resource to the terminal, and after transmitting the uplink scheduling signaling of the PUSCH transmission to the terminal, sends the PHICH to the terminal according to the allocated PHICH transmission resource according to the transmission power, otherwise, the current terminal is discarded.
  • the scheduling of the PUSCH transmission also gives up the PHICH transmission.
  • the PHICH transmission resource is allocated to the terminal and the allocated PHICH is used according to the transmission power.
  • the transmission resource transmits the PHICH to the terminal, and therefore, the reception performance of the PHICH can be effectively guaranteed.
  • FIG. 1 is a schematic flowchart of a method according to an embodiment of the present disclosure
  • FIG. 2 is a schematic structural diagram of a device according to an embodiment of the present invention. detailed description
  • the embodiment of the present invention provides a downlink transmission method.
  • this method when the current remaining power of the base station on the resource currently used for transmitting the PHICH can meet the transmission power required for transmitting the PHICH to the terminal, Assigning a PHICH transmission resource to the terminal and transmitting the PHICH to the terminal using the allocated PHICH transmission resource after transmitting the uplink scheduling signaling of the PUSCH transmission to the terminal; otherwise, discarding the current scheduling of the PUSCH transmission to the terminal.
  • a downlink transmission method provided by an embodiment of the present invention includes the following steps:
  • Step 10 After the base station allocates a physical uplink shared channel (PUSCH) transmission resource, the base station determines, according to the downlink channel condition of the terminal, the transmit power required to send the physical hybrid automatic request retransmission indication channel (PHICH) to the terminal; Step 11: Determining whether the current remaining power on the resource for transmitting the PHICH can meet the requirement of the transmit power, and if yes, allocating the PHICH transmission resource to the terminal, and after transmitting the uplink scheduling signaling of the PUSCH transmission to the terminal, according to the The transmit power transmits the PHICH to the terminal using the allocated PHICH transmission resource, otherwise, the current scheduling of the PUSCH transmission to the terminal is abandoned.
  • PUSCH physical uplink shared channel
  • step 10 the transmit power required to send the PHICH to the terminal is determined according to the downlink channel condition of the terminal, and the specific implementation may be as follows:
  • the base station corrects the frequency efficiency of the physical downlink shared channel (PDSCH) of the terminal according to the downlink transmission mode of the terminal, and obtains the equivalent spectral efficiency of the terminal under the PHICH.
  • PDSCH physical downlink shared channel
  • the following function can be used to correct the terminal.
  • the base station determines a PHICH measurement signal to noise ratio corresponding to the equivalent spectral efficiency of the terminal under the PHICH according to a signal to noise ratio and a spectrum efficiency corresponding curve;
  • the base station obtains a required transmit power P raiCH (UE ) on each resource unit ( RE ) when transmitting the PHICH to the terminal according to the PHICH measurement signal to noise ratio and the PHICH target signal to noise ratio, for example, the PHICH target signal to noise ratio and the PHICH.
  • the measured signal-to-noise ratio is subtracted to obtain the required transmit power on each RE when the PHICH is transmitted to the terminal.
  • the PHICH target SNR is determined as follows: Determine the PHICH transmission code rate, the transmission code rate is equal to the ratio of the number of information bits before encoding to the number of encoded information bits, and then look up the correspondence between the code rate and the SNR.
  • the signal-to-noise ratio corresponding to the transmission code rate is the PHICH target signal-to-noise ratio.
  • the base station determines whether the requirement of the transmit power can be met according to the current remaining power on the resource for transmitting the PHICH, and the specific implementation may be as follows:
  • the base station determines, for each Orthogonal Frequency Division Multiplexing (OFDM) symbol of the downlink control region in the subframe in which the PIHCH transmission is located, whether the remaining power on the OFDM symbol is not less than a desired power on the OFDM symbol, and the expected on the OFDM symbol.
  • the power is the product of the number of REs occupied by the PIHCH of the terminal on the OFDM symbol and the required transmit power on each RE when transmitting the PHICH to the terminal; where, the number of REs occupied by the terminal's PIHCH on the OFDM symbol
  • the PHICH configuration of the current cell may be directly obtained in a normal mode or an extended mode. For details, refer to the protocol 3GPP TS 36.211.
  • the residual power on the OFDM symbol is the difference between the nominal power on the OFDM symbol and the power already used on the OFDM symbol.
  • the base station determines the need to satisfy the transmit power, otherwise it determines that the demand for the transmit power cannot be met.
  • step 11 the base station allocates the PHICH transmission resource to the terminal, and sends the PHICH to the terminal by using the allocated PHICH transmission resource after transmitting the uplink scheduling signaling of the PUSCH transmission to the terminal, and the specific implementation may be as follows:
  • Step A The base station determines, according to the allocation result of the current PUSCH transmission resource, the PHICH transmission resource that the current terminal can use; if there is a PHICH transmission resource that the current terminal can use, go to step B, otherwise, go to step D; Step B: From the current The PHICH transmission resource that the terminal can use is selected to allocate the PHICH transmission resource to the terminal; the base station determines the DMRS cyclic shift value according to the allocated PHICH transmission resource, and delivers the DMRS cyclic shift value and the allocated PUSCH transmission resource to the terminal.
  • Uplink scheduling signaling of information
  • Step C After receiving the PUSCH sent by the terminal, the base station sends the PHICH to the terminal according to the transmit power using the allocated PHICH transmission resource, and ends;
  • Step D The base station relinquishes the current scheduling of the PUSCH transmission of the terminal, and ends; or, the base station re-allocates the PUSCH transmission resource to the terminal, and returns to step A, that is, the base station re-determines the current terminal according to the allocation result of the new PUSCH transmission resource.
  • the uplink scheduling signaling of the value and the re-allocated PUSCH transmission resource information after receiving the PUSCH transmitted by the terminal, transmitting the PHICH to the terminal by using the re-allocated PHICH transmission resource.
  • the foregoing base station determines, according to the allocation result of the PUSCH transmission resource, the PHICH transmission resource that the current terminal can use, and the specific implementation may be as follows:
  • the minimum physical resource block (PRB) sequence number occupied by the base station for each DMRS cyclic shift value available in the system according to the DMRS cyclic shift value and the allocated PUSCH transmission resource, according to the formula of the background technology part Determining the PHICH group sequence number "TM ⁇ and the intra-group orthogonal sequence number used to identify a PHICH transmission resource to form a PHICH transmission resource index combination, respectively determining the PHICH identified by the PHICH transmission resource index combination in the subframe in which the PIHCH transmission is located. Whether the transmission resource has been allocated to other terminals, and when the determination is no, the PHICH transmission resource identified by the PHICH transmission resource index combination is determined as the PHICH transmission resource that the current terminal can use.
  • PRB physical resource block
  • the base station may further determine a PHICH group index of the PHICH transmission resource combination corresponding to the n TM CH, PHICH transmit power of the other terminal has been allocated PHICH transmission resources to the PHICH is transmitted to a terminal required transmit power P PHICH (UE) Whether the absolute value of the difference is less than a preset upper limit of the power difference between users; the upper limit of the power difference between the users is a value greater than 0; if the base station determines that it is less than the upper limit of the power difference between the users, The PHICH transmission resource identified by the PHICH transmission resource index combination is determined as the PHICH transmission resource that can be used by the current terminal. Otherwise, the PHICH transmission resource identified by the PHICH transmission resource index combination is
  • the base station selects a PHICH transmission resource from the PHICH transmission resource that can be used by the current terminal to allocate to the terminal, and the specific implementation may be as follows:
  • the base station determines, for each PHICH transmission resource that the current terminal can use, the total transmit power on the RE in the PHICH transmission resource when the PHICH transmission resource is used to send the PHICH to the terminal, and does not exceed the preset RE transmission power.
  • the total transmit power on the RE in the PHICH transmission resource when the PHICH is transmitted is: the sum of the transmit power P PHICH (UE) required to transmit the PHICH to the terminal and the transmit power of other terminals on the RE.
  • a PHICH transmission resource with the smallest remaining power is selected from the PHICH transmission resources that do not need to perform additional power compensation, and otherwise, the terminal is allocated.
  • the PHICH transmission resource that can be used by the previous terminal selects a PHICH transmission resource with the smallest power compensation amplitude to be allocated to the terminal, and the power compensation amplitude is the transmission on the RE in the PHICH transmission resource when the PHICH is transmitted to the terminal by using the corresponding PHICH transmission resource.
  • the transmit power on the RE in the PHICH transmission resource is the sum of the RE transmission power reference value and the power compensation amplitude of the PHICH transmission resource; or
  • the transmit power on the RE in the PHICH transmission resource is the sum of the transmit power P PHICH (UE ) required to transmit the PHICH to the terminal and the transmit power of other terminals on the RE.
  • the existing PHICH transmission resource allocation and PHICH power control can not work well together, which leads to the problem that the inter-cell interference fluctuation is severe or the PHICH reception performance is difficult to guarantee.
  • the present invention proposes a new PHICH dynamic resource allocation method. The specific content of the method is as follows:
  • the value may be set statically cell according to the present cell according to the CRS EPRE desired PHICH transmit power, the actual transmission may be semi-statically determined in the case where a desired transmit power PHICH.
  • CRS and PCFICH when scheduling the uplink subframe n in the downlink subframe ⁇ - ⁇ , it is first necessary to complete the RE of the CRS and PCFICH in the downlink control region of the downlink subframe n+ k P Pre-emption and power allocation of resources. For each OFDM symbol of the downlink control region, the sum of the powers that all REs can allocate is the rated power of the base station.
  • it is also necessary to obtain the PHICH parameter configuration of the current cell so as to determine whether the PHICH group number H and the current PHICH configuration are in a normal mode or an extended mode.
  • the PHICH dynamic resource allocation scheme proposed by the present invention is as follows: Step 1: Assuming that the downlink transmission of the subframe n is scheduled in the downlink subframe n- ⁇ «c ff , the PUSCH is performed for the UE i in the subframe n- K PuscH
  • the PUSCH resource allocation module calls the PHICH transmission resource allocation module to perform PHICH transmission resource allocation after allocating the PUSCH transmission resource, and the PHICH transmission resource allocation module determines that the PUSCH transmission of the uplink subframe n is required in the downlink subframe n+ k PH c H Performing ACK/NACK feedback, performing PHICH transmission resource allocation, and feeding back the allocation result to the PUSCH resource allocation module; and further determining the parameter of the DCI format 0 transmitted in the subframe n- K PuscH " 5.
  • the PHICH transmission resource allocation of the UE i fails, and the PUSCH resource allocation module is notified;
  • step 1.2 If the remaining power on all OFDM symbols meets the power requirements of the UE, perform step 1.2.
  • Step 1.2 The lowest PRB number ⁇ lowest _ index occupied by the PUSCH transmission resource according to subframe n in the first time slot
  • Matching set ⁇ ⁇ l n P CH ' n PHICH ) ⁇ : If the set S is empty, the PHICH transmission resource allocation of the U3 ⁇ 4 fails, and the PHICH transmission resource allocation result is returned to the PUSCH resource allocation module; if S is not If it is empty, go to step 1.3.
  • the index combination with the smallest power compensation amplitude is selected in the addressing set, and the index combination is marked as a resource requiring additional power compensation, and the power compensation amplitude is determined.
  • n PHICH ⁇ PHICH determine the parameter "based on the value" to set the corresponding flag bit of DCI format 0, and inform the PUSCH resource allocation module that the resource allocation is successful.
  • Step 2 The PUSCH resource allocation module performs further processing according to the resource allocation result returned by the PHICH transmission resource allocation module: if the PHICH transmission resource allocation is successful, it is considered that the PUSCH resource allocation for the UEi is successful this time; if the PHICH transmission resource allocation fails, the Subframe n- KpuscH no longer schedules UEi PUSCH in subframe n
  • Transmission can also change the PUSCH resource allocated to UE i, that is, after updating the parameters, perform step 1 again. New attempts are made to allocate PHICH transmission resources.
  • Step 3 The base station needs to perform UE; PHICH transmission in the downlink subframe n+ k P according to the allocated PHICH
  • step 1.1 when determining the transmit power required for the PHICH transmission of the UEi, the specific method is as follows: First: According to the downlink transmission mode of the U3 ⁇ 4 7 ⁇ 1 ⁇ ), the physical downlink shared channel (Physical Downlink Shared Channel, the U3 ⁇ 4) The spectral efficiency of PDSCH is corrected to obtain the equivalent spectral efficiency of ⁇ 3 ⁇ 4 under PHICH: £ ⁇ :
  • step 1.1 when determining whether each OFDM symbol in the downlink control region can meet the current U3 ⁇ 4 power requirement, the specific method is as follows:
  • the number of REs that need to be occupied by the PHICH transmission of the U3 ⁇ 4 in the OFDM symbol of the downlink control area is determined according to the current cell PHICH configuration, and the number of REs can be directly obtained according to whether the current cell PHICH is configured in the normal mode or the extended mode.
  • This brain- 114 is the reference traversal of each of the sets, and then calculates the group seq according to the formula given in the background art.
  • the PHICH packet number ⁇ and the intra-group orthogonal sequence number TM ⁇ form an addressable PHICH transmission resource index combination egroup seq ⁇
  • ⁇ group Use If the combination is in the sub-frame n+ is not assigned to other users, and belongs to the PHICH group, n group
  • TH PHICH g rou P _m ff is the upper limit of the power difference between users in the same p HICH packet.
  • the transmit power on each RE of the PHICH is determined to be P P ⁇ CH- EPRE ⁇ GMUP. If the PHICH packet is selected, the total transmit power of the PH resource corresponding to the PHICH packet can be guaranteed not to exceed the value. It is considered to belong to the set S l .
  • the PHICH packet with the smallest power compensation amplitude and the PHICH reception performance is selected as the PHICH allocation result of the current UE, so as to ensure that the subsequent UE can more easily allocate the PHICH transmission resource.
  • S 1 is empty, the PHICH packet with the smallest remaining power is selected among all available resource sets to ensure that the difference between the final transmit power of the PHICH and the preset transmit power value is as small as possible, thereby minimizing PHICH transmission resources. Drastic fluctuations in transmit power.
  • step 2 if the PHICH transmission resource allocation is successful, the combination f ⁇ group seq T lowest _ index according to the selected resource index
  • the PRB resource selected by the PUSCH resource allocation module determines the lowest PRB sequence number to calculate the value of the UE ; and sets the corresponding flag bit in the uplink scheduling grant DCI format 0 according to the value thereof, according to the PUSCH.
  • the result of the resource allocation (such as the allocated PRB set, the selected MCS, etc.) fills in the corresponding information of the DCI format 0, and sends the uplink scheduling grant information in the PDCCH channel of the subframe n- KpuscH to inform the UE i The scheduling result of frame n.
  • Step 3 may also be: in subframe n + k PHicH to the UE; when transmitting PHICH, the UE according to the acquired; required transmit power PHICH P PHICH ( ⁇ ), as this power of the UE; in the selected PHICH (with Resource index combination
  • an embodiment of the present invention further provides a downlink transmission device, where the device includes:
  • the power determining unit 20 is configured to determine, after the physical uplink shared channel PUSCH transmission resource is allocated to the terminal, the transmit power required to send the physical hybrid automatic request retransmission indication channel PHICH to the terminal according to the downlink channel condition of the terminal;
  • the requirement determining unit 21 is configured to determine, according to the current remaining power on the resource used for transmitting the PHICH, whether the requirement of the transmit power can be met;
  • the downlink transmission unit 22 is configured to allocate a PHICH transmission resource to the terminal when the requirement determining unit determines to be YES, and use the allocated PHICH transmission resource according to the transmission power after transmitting the uplink scheduling signaling of the PUSCH transmission to the terminal.
  • the PHICH is transmitted to the terminal, and when the demand determining unit determines NO, the current scheduling of the PUSCH transmission to the terminal is abandoned.
  • the power determining unit 20 is configured to:
  • the spectrum efficiency of the physical downlink shared channel PDSCH of the terminal is corrected, and the equivalent spectral efficiency of the terminal under the PHICH is obtained:
  • the PHICH measurement signal-to-noise ratio corresponding to the equivalent spectral efficiency of the terminal under the PHICH is determined;
  • the required transmission power on each resource unit RE when transmitting the PHICH to the terminal is obtained.
  • the demand determining unit 21 is configured to:
  • the downlink transmission unit 22 is configured to:
  • the requirement determining unit determines to be YES, determining, according to the PUSCH transmission resource allocation result, the PHICH transmission resource that the current terminal can use; and selecting one PHICH transmission resource from the PHICH transmission resource that can be used by the current terminal to allocate to the terminal;
  • the downlink transmission unit 22 is further configured to:
  • the PHICH transmission resource re-determines the DMRS cyclic shift value, and sends the uplink scheduling signaling carrying the re-determined DMRS cyclic shift value and the re-allocated PUSCH transmission resource information to the terminal; after receiving the PUSCH sent by the terminal, using Reassigned PHICH transmission resources to send PHICH to the terminal
  • the downlink transmission unit 22 is configured to:
  • each DMRS cyclic shift value available in the system it is determined according to the DMRS cyclic shift value and the lowest physical resource block PRB sequence occupied by the allocated PUSCH transmission resource in the first time slot, respectively, for identifying a group seq
  • the PHICH group number of the PHICH transmission resource " ⁇ and the orthogonal sequence number ⁇ in the group form a PHICH transmission.
  • the PHICH transmission resource identified by the PHICH transmission resource index combination in the subframe in which the PIHCH transmission is located has been allocated to other terminals, and is determined to be Otherwise, the PHICH transmission resource identified by the PHICH transmission resource index combination is determined as a PHICH transmission resource that can be used by the current terminal.
  • the downlink transmission unit 22 is further configured to:
  • the PHICH transmission resource identified by the PHICH transmission resource index combination is the PHICH transmission resource that can be used by the current terminal, determining that the corresponding PHICH group in the PHICH transmission resource index combination is allocated Whether the absolute value of the difference between the PHICH transmission power of the terminal of the PHICH transmission resource and the transmission power required to transmit the PHICH to the terminal is less than a preset upper power difference between users; When the difference is the upper limit, the PHICH transmission resource identified by the PHICH transmission resource index combination is determined as the PHICH transmission resource that the current terminal can use.
  • the downlink transmission unit 22 is configured to:
  • a PHICH transmission resource with the smallest power compensation amplitude is selected from the PHICH transmission resources that can be used by the current terminal, and the power compensation amplitude is sent to the terminal by using the corresponding PHICH transmission resource.
  • the downlink transmission unit 22 is configured to:
  • the PHICH is transmitted to the terminal on the allocated PHICH transmission resource, and the transmission power on the RE in the PHICH transmission resource is the sum of the RE transmission power reference value and the power compensation amplitude of the PHICH transmission resource.
  • the downlink transmission unit 22 is configured to:
  • the PHICH is transmitted to the terminal on the allocated PHICH transmission resource, and the transmission power on the RE in the PHICH transmission resource is the sum of the transmission power required to transmit the PHICH to the terminal and the transmission power of other terminals on the RE.
  • the beneficial effects of the present invention include:
  • the base station determines, according to the downlink channel condition of the terminal, the transmit power required to send the PHICH to the terminal, and determines whether the current remaining power on the resource used for transmitting the PHICH is And the PHICH transmission resource is allocated to the terminal, and after the uplink scheduling signaling of the PUSCH transmission is sent to the terminal, the PHICH transmission resource is used to send the PHICH to the terminal according to the transmission power, otherwise Abandoning the current scheduling of the PUSCH transmission of the terminal, and abandoning the PHICH transmission.
  • the PHICH transmission resource is allocated to the terminal and the allocated PHICH is used according to the transmission power.
  • the transmission resource transmits the PHICH to the terminal, and therefore, the reception performance of the PHICH can be effectively guaranteed.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory include instructions.
  • the manufacturing device, the instruction device implements the functions specified in one or more blocks of a flow or a flow and/or a block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne le domaine technique des communications sans fil. Un procédé et un dispositif de transmission en liaison descendante sont décrits pour résoudre le problème de comment assurer les performances de réception d'un canal indicateur de demande automatique de répétition hybride physique (PHICH). Selon la présente invention, après attribution de ressources de transmission de canal partagé de liaison montante physique (PUSCH) à un terminal, une station de base détermine, en fonction d'un état de canal de liaison descendante du terminal, une puissance d'émission requise pour envoyer un PHICH au terminal ; la station de base détermine, en fonction d'une puissance restante courante sur des ressources de transmission du PHICH, si l'exigence de la puissance d'émission peut être satisfaite, si tel est le cas, attribue des ressources de transmission de PHICH au terminal et, après avoir envoyé une signalisation de planification de liaison montante pour une transmission de PUSCH, envoie conformément à la puissance d'émission, le PHICH par l'utilisation des ressources de transmission de PHICH attribuées ; et sinon, abandonne la planification courante de la transmission de PUSCH du terminal. Selon la présente invention, les performances de réception du PHICH peuvent être assurées.
PCT/CN2012/073338 2011-06-10 2012-03-30 Procédé et dispositif de transmission en liaison descendante Ceased WO2012167652A1 (fr)

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CN102223722B (zh) * 2011-06-10 2013-11-20 电信科学技术研究院 下行传输方法和设备
CN103167595B (zh) * 2011-12-13 2018-01-19 中兴通讯股份有限公司 一种物理混合重传指示信道的资源与功率分配方法及装置
WO2013135018A1 (fr) * 2012-03-16 2013-09-19 中兴通讯股份有限公司 Procédé de retransmission pour structure de trame auto-adaptative en mode de duplexage par répartition dans le temps, et dispositif côté réseau correspondant
CN102869103B (zh) * 2012-09-26 2014-11-26 大唐移动通信设备有限公司 一种phich数据发送方法及装置
CN103997396B (zh) * 2013-02-18 2017-05-10 中国电信股份有限公司 Fdd‑lte网络中混合自动重传的方法、装置和系统
CN107155408B (zh) * 2015-01-20 2019-11-19 华为技术有限公司 一种信息传输方法、设备及系统
CN106413066A (zh) * 2015-07-29 2017-02-15 中兴通讯股份有限公司 一种lte系统的用户流量提升方法、装置及基站
CN108024375B (zh) * 2016-11-04 2020-12-15 华为技术有限公司 一种用于数据传输的方法和装置
CN110474748B (zh) 2018-05-11 2023-10-20 华为技术有限公司 功率抬升值确定方法和装置
CN109068389B (zh) * 2018-09-04 2023-04-11 京信网络系统股份有限公司 窄带物联网资源分配方法、装置和基站
CN111436064B (zh) * 2019-01-11 2023-05-09 中国移动通信有限公司研究院 控制信道协作传输的方法及装置
CN115580930B (zh) * 2021-06-21 2025-08-12 大唐移动通信设备有限公司 下行信道功率分配方法、通信装置和存储介质
CN116056239B (zh) * 2023-01-31 2025-12-23 上海物骐微电子有限公司 资源分配方法、装置、电子设备及存储介质

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