WO2010135860A1 - Procédé et appareil d'allocation du canal d'accusé de réception multiporteuse - Google Patents

Procédé et appareil d'allocation du canal d'accusé de réception multiporteuse Download PDF

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Publication number
WO2010135860A1
WO2010135860A1 PCT/CN2009/071968 CN2009071968W WO2010135860A1 WO 2010135860 A1 WO2010135860 A1 WO 2010135860A1 CN 2009071968 W CN2009071968 W CN 2009071968W WO 2010135860 A1 WO2010135860 A1 WO 2010135860A1
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Prior art keywords
ack channel
sequence number
carrier
uplink ack
sub
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PCT/CN2009/071968
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English (en)
Chinese (zh)
Inventor
陈小波
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN200980124920.1A priority Critical patent/CN102077669B/zh
Priority to PCT/CN2009/071968 priority patent/WO2010135860A1/fr
Publication of WO2010135860A1 publication Critical patent/WO2010135860A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0055—Physical resource allocation for ACK/NACK
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management

Definitions

  • Embodiments of the present invention relate to communication technologies, and in particular, to a method and an apparatus for multi-carrier ACK channel allocation. Background of the invention
  • LTE-A Long Term Evolution - Advanced
  • LTE-A with carrier aggregation multiple component carriers can be used simultaneously to obtain a wider transmission bandwidth.
  • Each component carrier in the LTE-A system may be configured to be compatible with the LTE system, and the spectrum of each component carrier may be an adjacent contiguous spectrum, or may be a non-adjacent spectrum in the same frequency band or even in a different frequency band. Discontinuous spectrum.
  • an LTE User Equipment can only access one or a pair of component carriers for data transmission and reception, and the LTE-A UE can simultaneously access multiple members according to its capabilities and service requirements.
  • the carrier performs data transmission and reception.
  • Carrier aggregation technology is sometimes called Spectrum Aggregation or Bandwidth Extension.
  • each member carrier has a separate HARQ (Hybrid Automatic Repeat Request) process
  • the LTE-A UE can be configured with different UL CCs (UpLink Component Carriers). Carrier) and the number of DL CCs (downlink component carriers).
  • UL CCs UpLink Component Carriers
  • Carrier Carrier
  • DL CCs downlink component carriers
  • PDCCH Physical Downlink Control
  • CHannel physical layer downlink control channel
  • CHannel physical layer downlink control channel
  • the LTE-A base station allocates an ACK channel to at least one DL CC by setting different uplink ACK channel mapping start offsets for each DL CC, which causes discontinuity of uplink ACK channel allocation, so each The DL CCs are discontinuous by the resource blocks corresponding to the idle uplink ACK channel, and it is difficult to utilize these discontinuous resource blocks.
  • the prior art requires the base station to send signaling for each initial offset, which increases the number of signaling that the base station sends. Summary of the invention
  • Embodiments of the present invention provide a method, device, and system for multi-carrier ACK channel allocation.
  • An embodiment of the present invention provides a method for allocating a multi-carrier ACK channel, including: allocating a sequence number to at least one DL CC and/or a downlink subframe;
  • Sub-blocks are allocated for the uplink ACK channel corresponding to the downlink subframe of the DL CC, and the sub-block labels are allocated; the uplink ACK channel is allocated to the at least one DL CC according to the sequence of incrementing the above-mentioned sequence numbers and incrementing the sub-block labels.
  • An embodiment of the present invention provides a base station, including:
  • a first sequence number allocation module configured to allocate a sequence number to at least one DL CC and/or a downlink subframe
  • a first label allocation module configured to divide a sub-block for an uplink ACK channel corresponding to each downlink subframe, and allocate a sub-block label ;
  • a first channel allocation module configured to allocate an uplink ACK channel to the at least one DL CC according to the sequence of incrementing the foregoing sequence number and then incrementing the foregoing sub-block number.
  • An embodiment of the present invention provides a UE, including:
  • a second channel allocation module configured to allocate an uplink ACK channel to the at least one DL CC according to the order of increasing the sequence number and then incrementing the sub-block number.
  • An embodiment of the present invention provides a system for multi-carrier ACK channel allocation, including: The base station is configured to allocate a sub-block for the uplink ACK channel corresponding to each downlink subframe, and allocate a sub-block label; and configured to allocate an uplink ACK to the at least one DL CC according to the sequence of incrementing the sequence number and then incrementing the sub-block label.
  • Channel configured to allocate an uplink ACK channel for at least one DL CC according to an order of increasing the foregoing sequence number and then incrementing the foregoing label.
  • a method, a device, and a system for allocating a multi-carrier ACK channel allocate an uplink ACK channel corresponding to an actual associated subframe of a different DL CC, the sequence number of the sub-block can be incremented and the paired DL CC
  • Corresponding idle uplink ACK channel blocks caused by fewer actual associated subframes and smaller n CFI values are organized into continuous distribution, thus being able to better support dynamics on resource blocks corresponding to these idle uplink ACK channel blocks.
  • the physical layer uplink shared channel is scheduled.
  • LTE-A TDD LTE-A Time Division Duplex
  • FIG. 2 is a schematic diagram of an embodiment of allocating an uplink ACK channel according to the present invention.
  • FIG. 3 is a schematic diagram of an uplink ACK channel distribution allocated by a PDCCH
  • FIG. 4 is a schematic diagram of an uplink ACK channel distribution allocated by a PDCCH
  • FIG. 5 is a schematic diagram of an ACK channel allocation result according to an embodiment of the present invention.
  • FIG. 6 is a schematic diagram of an embodiment of an uplink ACK channel reserved for at least one DL CC according to the present invention
  • FIG. 7 is a schematic structural diagram of a base station according to an embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of a UE according to an embodiment of the present invention. Mode for carrying out the invention
  • the embodiment of the present invention provides a method and a device for allocating an ACK channel under carrier aggregation, and further describes the technical solution of the embodiment of the present invention in further detail.
  • the inventor finds a base station in the prior art of LTE-A.
  • the method of allocating an uplink ACK channel for at least one DL CC is to set a different ACK channel mapping start offset for each DL CC, and the base station is required to signal each start offset.
  • the idle uplink ACK channel block caused by the less actual number of associated subframes and the smaller " ⁇ value corresponding to the DL CC is discontinuously distributed, so it is difficult to dynamically schedule these idle resources. Up to the data transmission; and because the initial offset is to be sent separately for each DL CC, the number of signaling sent by the base station is increased.
  • the uplink ACK channel mapping start offset of the ith DL CC setting is N CCHJ
  • the CCE (Control Channel Element) of the i-th DL CC is shown as the number of uplink ACK channels reserved for the uplink ACK channel label mapping.
  • a method similar to n CCE to CCH mapping in the LTE system is adopted in each component carrier.
  • the " CC £ to" mapping method in the LTE TDD is: According to the uplink and downlink subframe ratio and the HARQ timing relationship, the downlink associated subframe set index is defined for each uplink subframe: ,..., ⁇ , as shown in Table 1 below.
  • the problem is that the uplink ACK channel is allocated to the PDCCHs that are sent in at least one downlink subframe in one uplink subframe. In the downlink associated subframe set index: ,...
  • the number of elements in the set M indicates that the uplink ACK channel is allocated to the PDCCHs that are sent by the M subframes in the uplink subframe; the order of the elements, that is, the subscript w of t m (0 ⁇ w ⁇ M - 1)
  • the corresponding subframe is followed by a downlink subframe set that feeds back ACK/NACK (ACKnowledgement/Negative-ACKnowledgement acknowledgement/deny response) in the uplink subframe.
  • ACK/NACK ACKnowledgement/Negative-ACKnowledgement acknowledgement/deny response
  • the occupied initial CCE label is n CCE
  • the corresponding allocated uplink ACK channel label is first Select one from the set ⁇ ⁇ 0,1,2,3 ⁇ ; 7 values make
  • the calculated uplink ACK channel label is calculated, where ⁇ indicates the starting offset of the uplink ACK channel mapped according to the CCE label in all PUCCH (Physical Layer Uplink Control CHannel) format 1/la/lb channel Set,
  • N p max ⁇ 0, Is the downlink system bandwidth represented by the number of resource blocks, N is the number of consecutive subcarriers occupied by a resource block in the frequency domain, and L" represents a rounding down operation.
  • the uplink ACK channel mapping starting offset is set at this time.
  • A3 ⁇ 4 COT it is set according to the maximum number of elements in the index of the uplink and downlink associated subframe set. For example, when the uplink and downlink subframe ratio is 3, the maximum number of elements in the downlink associated subframe set index is 3, that is, the uplink ACK channel resource is reserved according to the number of CCEs of the three downlink subframes.
  • the reserved uplink ACK channel resources may exceed the actual demand, and the resource blocks corresponding to the idle uplink ACK channels may be dynamic in the LTE TDD system.
  • the ground is scheduled for PUSCH transmission.
  • mapping method is applied to the nCCE n PUCCH in the LTE-A TDD system.
  • these idle uplink ACK channels are not continuous, and it is difficult to be dynamically scheduled for PUSCH transmission at the same time.
  • LTE-A TDD system when different uplink ACK channel mapping start offsets are respectively set for each DL CC in at least one DL CC of the same UL CC mapping uplink ACK channel, also according to each DL CC The corresponding maximum number of elements in the downlink associated subframe set index is set.
  • Figure 1 shows an example in which all component carriers use the uplink-downlink subframe ratio of 3, and allocate the corresponding uplink ACK channel to the PDCCHs sent by the three DL CCs in the same UL CC; Up to 3 subframes in the downlink associated subframe set index when the uplink-downlink subframe ratio is 3, so the uplink ACK channel mapping start offset is set according to 3 subframes; in subframes 3 and 4 of the UL CC.
  • the uplink ACK channels allocated for the two subframes in the downlink associated subframe set index of each DL CC are respectively shown in the gray and black small blocks in FIG. 1, and the reserved uplink ACK channel corresponding to one subframe is idle.
  • each of the small blocks corresponds to at least one consecutive upstream ACK channel.
  • the third small block allocated to each subframe is also an idle uplink ACK. At this time, all the idle uplink ACK channels are as shown in Figure 1.
  • the idle uplink ACK channels in the uplink ACK channels reserved for each DL CC are discontinuously distributed, and these discontinuous idles
  • the resource block corresponding to the uplink ACK channel cannot be utilized during data transmission, so waste is formed.
  • an idle uplink ACK channel block caused by a small number of actually associated subframes and a small value is organized into a continuous distribution by an allocation rule, and these idle uplinks may be used.
  • the resource blocks corresponding to the ACK channel are aggregated to better support dynamic scheduling of PUSCH transmissions on these resource blocks.
  • the signaling sent by the base station can be effectively reduced.
  • 2 is a schematic diagram of an embodiment of a downlink subframe allocation sequence number, an allocation sub-block number, and an uplink ACK channel of at least one DL CC according to the present invention. This embodiment includes:
  • Step 201 Assign a sequence number to at least one DL CC and/or a downlink subframe.
  • Step 202 Divide a sub-block for an uplink ACK channel corresponding to a downlink subframe of the DL CC, and allocate a sub-block label;
  • Step 203 Allocate an uplink ACK channel to the at least one DL CC according to the order of increasing the foregoing sequence number and then incrementing the foregoing sub-block number.
  • This embodiment is applicable to the LTE-A TDD and LTE-A FDD systems, and the base station allocates an uplink ACK channel to the DL CC.
  • the base station Before allocating the uplink ACK channel, the base station divides the DL CC into pairs and unpaired, and then assigns the carrier mapping sequence number to them.
  • the subframe mapping sequence number needs to be allocated after the carrier mapping sequence number is allocated.
  • the 4 Cff of the uplink ACK channel to be allocated is obtained by calculating the formula. The following is a detailed description of each step.
  • the LTE UE can only access one UL CC and one DL CC at the same time, and the LTE-A UE can simultaneously access A UL CC and A Di DL CC, where both A m and A Di are positive integers. And the two can be different.
  • the LTE-A UE when the number of configured DL CCs is > 1 and the PDCCH is transmitted on the configured DL CC, it may be the same according to the correspondence between the DL CC where the LTE-A UE PDCCH is located and the UL CC where the uplink ACK channel is located.
  • the UL CC allocates an uplink ACK channel to a PDCCH that is transmitted to the LTE-A UE under a plurality of DL CCs.
  • a corresponding relationship is that the uplink ACK channels allocated for the PDCCHs sent by the multiple DL CCs are dispersed in the configured UL CCs, as shown in the example in FIG.
  • DL CC 1 and DL CCs are configured for one LTE-A UE.
  • DL CC 3, UL CC 1 and UL CC 2 the PDCCH sent by DL CC 1 is assigned an uplink ACK corresponding to UL CC 1
  • the PDCCH transmitted by the DL CC 2 and the DL CC 3 allocates a corresponding uplink ACK channel in the UL CC 2.
  • Another type of correspondence is that the uplink ACK channels allocated by the PDCCHs that are allocated by all the configured DL CCs are concentrated in a certain UL CC, as shown in FIG. 4 , where DL CC 1 and DL CC are configured for a certain LTE-A UE.
  • DLCC 3 ULCC 1 ⁇ ULCC2
  • PDCCHs transmitted in DLCC 1, DL CC 2, and DL CC 3 are all concentrated on the uplink ACK channel corresponding to the UL CC 2 allocation.
  • it is from the perspective of an LTE-AUE. From a system perspective, the correspondence between the DL CC where the PDCCH of each LTE-A UE and the uplink ACK channel are located may be the same or different.
  • the UL CC is the DL.
  • the PDCCH delivered by CC i reserves and allocates an uplink ACK channel.
  • one ULCC and one DLCC can be simultaneously accessed by one LTE UE, it is called a component pair component carrier, and will be called a pair of component carriers of each other; otherwise, it is called a group.
  • Unpaired member carriers and will be referred to each other as the unpaired member carrier of the other party.
  • ULCC1 and DLCC 1, ULCC 2 and DLCC 2 are such two component pairs of component carriers; in the remaining case, one UL CC and one DL CC constitute a set of unpaired component carriers.
  • step 201 when the base station is to be in a certain ULCC, it is 4) (4) ⁇ 1) DLCC, ....
  • the LTE-A TDD system can be similar to the LTE TDD system, according to the uplink and downlink subframe ratio setting of the component carrier and the HARQ timing relationship, and the UL CC is defined as 4) DL CCs respectively.
  • Downlink associated subframe set index When the uplink and downlink subframe ratio settings are the same, it is recommended to use the same downlink associated subframe set index as the LTE TDD system, as shown in Table 1.
  • the actual number of subframes associated with each DL CC is the number of elements in the downlink associated subframe set index defined for the current uplink subframe of the UL CC.
  • the foregoing allocation sequence number may be a direct unified number allocation of at least one downlink associated subframe of the at least one DL CC, and the subframe mapping sequence number in the DL CC has been given in consideration of the order of the elements in the downlink associated subframe set index.
  • the sequence number assigned is composed of a carrier mapping sequence number and a subframe mapping sequence number.
  • the sequence number assigned to each downlink associated subframe of the at least one DL CC that maps the uplink ACK channel in the same UL CC is specifically: assigning a carrier mapping sequence number to the unpaired DL CC in the 4) DL CCs according to the downlink associated subframe set index
  • the element order is assigned a subframe mapping sequence number w for each associated downlink subframe within each DL CC.
  • the actual number of subframes associated with each DL CC is 1.
  • the sequence number assigned to each downlink associated subframe of the at least one DL CC of the same UL CC mapping uplink ACK channel is specifically: assigning a carrier mapping number to the unpaired DL CC of the 4 DL CCs
  • the carrier mapping sequence number is only allocated for the unpaired DL CCs of the four DL CCs, so that the paired DL CCs adopt the uplink ACK channel allocation mechanism of the LTE system to maintain the LTE UE.
  • the at least one DL CC is at least one unpaired DL CC.
  • DL CCs can be regarded as a set ⁇ ' , ⁇ , U to the set ⁇ 0, ⁇ , 4 _ 2 ⁇ - mapping.
  • the base station may notify the LTE-A UE of the assigned carrier mapping sequence number in the following manner.
  • the base station transmits a carrier mapping sequence number assigned to the unpaired DL CC in the paired DL CC broadcast of the UL CC.
  • the assigned carrier mapping sequence number is mapped according to the unpaired DL CC label of the notification according to the preset rule. Further, the preset rule may be a mapping of the carrier label to the carrier mapping sequence number.
  • Manner 3 For the LTE-A UE, the base station notifies at least the carrier mapping sequence number of the unpaired DL CC configured by the LTE-A UE by using UE-specific signaling.
  • the first label allocation module of the base station divides the sub-blocks for the uplink ACK channel corresponding to the downlink subframe of the DL CC, and allocates the sub-block labels.
  • the above divided sub-blocks are performed according to different CCE numbers when the PDCCH channel occupies a different number of OFDM symbols n CFI .
  • step 201 is to assign a carrier mapping sequence number to the unpaired DL CCs of the 4) DL CCs.
  • the at least one DL CC is at least one unpaired DL CC and is not paired with DL CCs.
  • the number is - impair , ⁇ A _ impair ⁇ A ⁇ , 0 ⁇ q ⁇ A_ impair.
  • the uplink ACK channel corresponding to one downlink subframe is divided into sub-blocks, and the first P sub-blocks are composed of N uplink ACK channels, then the Pth sub-block is composed of N q , d
  • the number consists of consecutive uplink ACK channels.
  • N ⁇ denotes the downlink subframe pre-corresponding to the unpaired DL CC to which the carrier mapping sequence number is assigned in the LTE-A FDD system
  • the number of uplink ACK channels reserved where ⁇ represents the number of uplink ACK channels reserved for the downlink subframe corresponding to the wth element of the downlink associated subframe set index of the unpaired DL CC to which the carrier mapping sequence number is allocated in the LTE-A TDD system
  • Min ⁇ x,j ⁇ means taking the smaller of x and y.
  • Another type of overhead compression mechanism is a resource compression factor used by a base station to broadcast an uplink ACK channel reserved for an unpaired DL CC to which a carrier mapping sequence number is assigned, where is a positive integer, where ⁇ represents
  • the above-mentioned allocation sub-block label is assigned a sub-block label according to the CCE label " CC £ .
  • the CCE label n CCE is a label of the CCE occupied by the UE PDCCH channel.
  • the PDCCH channel occupies multiple CCEs, it may also be a PDCCH channel.
  • the specific process of allocating the sub-block label P according to the CCE label n CCE is: selecting a P from the set ⁇ 0, 1, 2, 3 ⁇ in the downlink subframe labeled with the carrier mapping sequence number as " CC " The value is such that N q , p ⁇ fO ⁇ N q , p + l , assign sub-block numbers where /(" CC £ ) represents a function of the CCE label " CC £ .
  • Step 203 Assign an uplink ACK channel to the at least one DL CC according to the sequence of incrementing the sequence number and then incrementing the sub-block number.
  • the uplink ACK channel allocation mechanism of the LTE system is reused in order to maintain backward compatibility with the LTE UE, and will not be described in detail herein. Discussed below is the process of allocating an uplink ACK channel for an unpaired DL CC.
  • the foregoing step of incrementing the sequence number by incrementing the sequence number is at least one
  • the DL CC allocates an uplink ACK channel, which is specifically: assigning an uplink ACK channel to at least one DL CC according to an order of increasing the carrier mapping sequence number, re-incrementing the subframe mapping sequence number w, and finally incrementing the sub-block number P;
  • the mapping sequence number ⁇ , the re-incrementing carrier mapping sequence number, and the order of the last sub-block number P are finally incremented to allocate an uplink ACK channel for at least one DL CC.
  • the carrier mapping sequence number q is incremented, and the subframe is incremented.
  • the sequence of mapping the sequence number w and finally incrementing the sub-block label p, the specific process of allocating the uplink ACK channel is as follows:
  • A3 ⁇ 4 CCff fl indicating the initial offset of the uplink ACK channel mapped according to at least one unpaired DL CC CCE label in all PUCCH format 1/la/lb channels.
  • the sequence number is incremented according to the first incrementing subframe, and the carrier is incremented.
  • the mapping sequence number ⁇ , the order of the last incrementing sub-block label P, the specific process of allocating the uplink ACK channel is as follows: Let the assigned uplink ACK channel label be UCCH , and substitute the sub-block label value assigned in step 202.
  • n CCH ⁇ ,. x N, p + ⁇ M t x (N, p+1 - N, p ) + mx ( ⁇ +1 - N q + f(n CCE ) - + N UCCH , calculated in U
  • ⁇ , ⁇ indicates the number of associated downlink subframes given by the downlink associated subframe set index of the DL CC to which the carrier mapping sequence number is assigned
  • A3 ⁇ 4 cai fl > indicates according to at least one unpaired DL CC
  • the sequence number is composed of a carrier mapping sequence number
  • the uplink ACK channel is allocated to at least one DL CC according to the sequence of incrementing the sequence number and then incrementing the sub-block number, which is specifically:
  • the order of the sub-block labels P is incremented to allocate an uplink ACK channel for at least one DL CC.
  • the actual number of subframes associated with each DL CC described above is 1.05.
  • the label is n CCE ⁇ CE
  • the specific process of allocating the uplink ACK channel according to the order of increasing the carrier mapping sequence ⁇ and incrementing the sub-block label P is as follows: :
  • the assigned uplink ACK channel label be CCH
  • substitute the sub-block label assigned in step 202 into npucc Calculating the assigned uplink ACK channel label, where Indicates the starting offset of the uplink ACK channel mapped according to at least one unpaired DL CC CCE label in all PUCCH format 1/la/lb channels.
  • the maximum number of elements in the downlink associated subframe set index corresponding to each DL CC is to be used.
  • the embodiment of the present invention proposes to map an uplink ACK channel on the same uplink component carrier according to the actual number of subframes associated with each DL CC.
  • Each downlink associated subframe of the at least one DL CC is allocated a sequence number, and the uplink ACK channel allocated in the subframe divides the sub-block and allocates the sub-block label, and the order of the sub-block label is incremented by increasing the sequence number to be at least one DL CC.
  • the uplink ACK channel is allocated.
  • H ⁇ DL CC 3 is a pair of DL CCs, and when the carrier mapping numbers 0 and 1 are respectively assigned to the unpaired DL CC 1 and DL CC 2, the uplink ACK channels are allocated for the paired and unpaired DL CCs.
  • the mapping start offset U CCH , x CH , u , ir respectively is notifying the mapping start offset U CCH , x CH , u , ir respectively , according to the order of increasing the carrier mapping sequence number, the incrementing subframe mapping sequence number, and the last increasing sub-block number.
  • the uplink ACK channel allocated for each DL CC is as shown in the figure. 5 is shown. As can be seen from FIG.
  • the embodiment of the present invention can organize idle uplink ACK channel blocks caused by fewer actual associated subframes and smaller values corresponding to unpaired DL CCs into a continuous distribution, and thus can be better.
  • the physical layer uplink shared channel is dynamically scheduled on the resource blocks corresponding to the idle uplink ACK channel blocks.
  • the embodiment of the present invention can prevent the base station from notifying an uplink ACK channel mapping start offset for each DL CC, and notifying the common uplink ACK channel mapping start offset for the unpaired DL CC, which can effectively reduce the base station sending Signaling.
  • the method can also be used in FDD systems to maintain the same design of LTE-A TDD and FDD systems.
  • the idle uplink ACK channel blocks of the unpaired DL CC due to the smaller " OT value" can be organized into a continuous distribution, and the resources corresponding to the idle uplink ACK channel blocks can be better supported.
  • the physical layer uplink shared channel is dynamically scheduled on the block.
  • Figure 6 is a schematic diagram 601 of an embodiment of the present invention for reserving an uplink ACK channel for at least one DL CC, which is reserved for at least one DL CC according to the maximum number of subframes associated with the DL CC.
  • Step 602 Assign a sequence number to at least one DL CC and/or a downlink subframe.
  • Step 603 Divide a sub-block for an uplink ACK channel corresponding to a downlink subframe of the DL CC, and allocate a sub-block label;
  • Step 604 Allocate an uplink ACK channel for at least one DL CC according to the order of increasing the foregoing sequence number and then incrementing the foregoing sub-block number.
  • This embodiment is applicable to the LTE-A TDD and LTE-A FDD systems, and the base station allocates an uplink ACK channel to the DL CC.
  • the base station reserves an uplink ACK channel for some DL CCs, then divides the DL CC into pairs and unpaired, and then assigns a carrier mapping sequence number to them.
  • the carrier mapping sequence number is allocated.
  • the subframe mapping sequence number needs to be allocated, and according to the above sequence number and the sub-block label, the n CCH of the uplink ACK channel to be allocated is obtained by calculating a formula. Each step is explained in detail below.
  • the LTE TDD system may be similar to the LTE TDD system, according to the uplink and downlink subframe ratio setting of the component carrier and the HARQ timing relationship, and the downlink component carrier is defined as the downlink associated subframe set index for the at least one DL CC. .
  • the uplink and downlink subframe ratio settings are the same, it is recommended to use the same downlink associated subframe set index as the LTE TDD system.
  • a simple resource reservation method is to reserve an uplink ACK channel for at least one DL CC according to the maximum number of elements in the downlink associated subframe set index of each DL CC, that is, the maximum number of subframes associated with the DL CC.
  • the maximum number of subframes associated with each DL CC is 1.
  • the uplink ACK channel resource reserved for the at least one DL CC informs the UE by indicating a starting offset A3 ⁇ 4 C in all PUCCH format 1/la/lb channels of the uplink ACK channel mapped according to the at least one DL CC CCE label.
  • the initial offset A3 ⁇ 4 COT of the uplink ACK channel mapped according to the at least one DL CC CCE label in all PUCCH formats 1/la/lb channel means ⁇ 3 ⁇ 4 ⁇ , ⁇ ⁇ ⁇ , this parameter can be broadcasted by the base station to inform the UE.
  • the base station also broadcasts a different uplink ACK channel mapping start offset and transmits the notified uplink ACK channel.
  • the initial offset is mapped to reserve uplink ACK channel resources.
  • the allocation of the uplink ACK channel to the PDCCH channel delivered by the unpaired DL CC may only occur in the LTE-A UE, so this part of the resource allocation may not consider the backward compatibility of the LTE UE.
  • it is an unpaired DL CC.
  • the reserved uplink ACK channel resources may not be reserved according to the maximum number of CCEs as in the LTE system, but introduce some overhead compression mechanism.
  • the overhead compression mechanism is the number of uplink ACK channels that the base station broadcasts to notify for unpaired DL CCs, such as or.
  • Another type of overhead compression mechanism is a resource compression factor used by the base station to notify the unpaired DL CC of the uplink ACK channel, for example, where a positive integer is used, which may be the same or different for each unpaired DL CC.
  • the resource compression factor is notified, the number of uplink ACK channels reserved for the unpaired DL CC to which the carrier mapping sequence number is assigned is calculated according to the notified resource compression factor, for example, for max - 4)] / 3 ⁇ ]
  • ⁇ denotes a PDCCH within a subframe
  • ⁇ can be 2 3 or 4 depending on the downlink system bandwidth and whether it is a subframe carrying the TDD system synchronization channel.
  • the base station allocates the uplink ACK channel to the at least one DL CC according to the sequence number and the sub-block number.
  • the base station allocates the uplink ACK channel to the DL CC that has reserved the ACK channel, and the specific allocation method is the same as steps 201 to 203. That is, the DL CC with the ACK channel reserved is allocated a set of ACK channels according to step 302.
  • the embodiment of the present invention proposes to allocate a carrier mapping sequence number to at least one DL CC of the same UL CC mapping uplink ACK channel, and reserve an uplink ACK channel for at least one DL CC according to the maximum number of subframes associated with the DL CC, according to the sequence number and the sub-block number.
  • the embodiments of the present invention can organize idle uplink ACK channel blocks corresponding to unpaired DL CCs into a continuous distribution, thereby better supporting dynamic scheduling of PUSCH transmissions on resource blocks corresponding to the idle uplink ACK channel blocks.
  • FIG. 7 is a schematic structural diagram of a base station according to an embodiment of the present invention, where the base station in this embodiment includes: a first sequence number allocation module 701, configured to allocate a sequence number for at least one DL CC and/or a downlink subframe;
  • a first sequence number allocation module 701 configured to allocate a sequence number for at least one DL CC and/or a downlink subframe;
  • a first label allocation module 702 configured to divide a sub-block for an uplink ACK channel corresponding to a downlink subframe of the DL CC, and allocate a sub-block label;
  • the first channel allocation module 703 is configured to allocate an uplink ACK channel to the at least one DL CC according to the sequence of incrementing the sequence number first and then incrementing the sub-block number.
  • the first sending module 704 is configured to send a carrier mapping sequence number or a CC label allocated by the first sequence number assigning module;
  • the first reservation module 705 is configured to reserve an uplink ACK channel for the at least one DL CC according to the maximum number of subframes associated with the DL CC, and send the reservation result to the first sequence number allocation module.
  • FIG. 8 is a schematic structural diagram of a UE according to an embodiment of the present invention.
  • the UE in this embodiment includes: a second channel allocation module 801, configured to allocate an uplink ACK to at least one DL CC according to an order of increasing a sequence number and then incrementing a sub-block number. channel.
  • the first receiving module 802 is configured to receive a carrier mapping sequence number or a CC label, and send the carrier mapping sequence number to the second channel allocation module or send the CC label to the first mapping module.
  • the first receiving module receives the CC label, it also includes:
  • the first mapping module 803 is configured to map the allocated carrier mapping sequence number according to the received CC label according to a preset rule.
  • the embodiments of the present invention are used in the embodiments shown in FIG. 2 and FIG. 6, and their features are not described again.
  • a software product which may be stored in a non-volatile storage medium (which may be a CD-ROM, a USB flash drive, a mobile hard disk, etc.), including several
  • the instructions are for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform the methods described above in accordance with various embodiments of the present invention.
  • modules in the apparatus in the embodiments may be distributed in the apparatus of the embodiment as described in the embodiment, or may be correspondingly changed in one or at least one apparatus different from the embodiment.
  • the modules of the above embodiments may be combined into one module, or may be further split into at least one sub-module.

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

Abstract

La présente invention porte sur un procédé et un appareil d'allocation du canal d'accusé de réception (ACK) multiporteuse. Ledit procédé comprend les opérations suivantes : la station de base attribue les numéros de séquence à au moins une porteuse composante (CC) de liaison descendante (DL) et/ou sous-trame de liaison descendante, divise le canal ACK de liaison montante correspondant à la sous-trame de liaison descendante de la porteuse composante de liaison descendante en sous-blocs, et attribue les étiquettes de sous-bloc, et alloue le canal ACK de liaison montante à au moins une porteuse composante de liaison descendante d'abord dans l'ordre croissant desdits numéros de séquence puis dans l'ordre croissant desdites étiquettes. La présente invention peut mieux prendre en charge une transmission de canal PUSCH à planification dynamique sur le bloc de ressource inactif, et peut en même temps efficacement réduire la signalisation à partir de la station de base.
PCT/CN2009/071968 2009-05-25 2009-05-25 Procédé et appareil d'allocation du canal d'accusé de réception multiporteuse WO2010135860A1 (fr)

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CN113115593A (zh) * 2018-11-12 2021-07-13 Oppo广东移动通信有限公司 装置及用于装置的非连续接收的方法

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CN103391166A (zh) * 2012-05-08 2013-11-13 普天信息技术研究院有限公司 一种pusch的授权和harq传输方法
CN103906251A (zh) * 2012-12-27 2014-07-02 普天信息技术研究院有限公司 一种lte网络中d2d模式下的harq-ack反馈方法
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CN113115593B (zh) * 2018-11-12 2023-05-09 Oppo广东移动通信有限公司 装置及用于装置的非连续接收的方法

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