WO2011137822A1 - Procédé et dispositif pour transmettre un index d'attributions de liaison descendante, procédé et dispositif pour renvoyer les informations de réponse - Google Patents

Procédé et dispositif pour transmettre un index d'attributions de liaison descendante, procédé et dispositif pour renvoyer les informations de réponse Download PDF

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Publication number
WO2011137822A1
WO2011137822A1 PCT/CN2011/074612 CN2011074612W WO2011137822A1 WO 2011137822 A1 WO2011137822 A1 WO 2011137822A1 CN 2011074612 W CN2011074612 W CN 2011074612W WO 2011137822 A1 WO2011137822 A1 WO 2011137822A1
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Prior art keywords
downlink
pdcch
subframe
carrier
detecting
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PCT/CN2011/074612
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English (en)
Chinese (zh)
Inventor
陈小波
吕永霞
张伟
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华为技术有限公司
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Publication of WO2011137822A1 publication Critical patent/WO2011137822A1/fr

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Classifications

    • 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
    • H04L1/0027—Scheduling of signalling, e.g. occurrence thereof
    • 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
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
    • 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
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path

Definitions

  • the present application claims priority to Chinese Patent Application No. 201010222636.2, entitled “Deletion Method and Apparatus for Downlink Assignment, Feedback Method and Apparatus for Response Channel", which is filed on July 6, 2010. The entire contents are incorporated herein by reference.
  • TECHNICAL FIELD The present invention relates to the field of communications technologies, and in particular, to a communication method, a downlink allocation indication (DAI) transmission method and apparatus, and a feedback channel feedback method and apparatus. Background technique
  • the 3GPP E-UTRA (Evolved Universal Terrestrial Radio Access) system is also called the LTE (Long Term Evolution) system.
  • LTE Long Term Evolution
  • data transmission/reception supports HARQ technology to reduce data transmission delay and obtain higher data transmission rate.
  • HARQ technology after receiving the data sent by the data sender, the data receiver needs to feed back the response information to the data sender to help confirm whether the data is correctly received.
  • the generated response information takes an ACK (Acknowledgement), and the ACK is fed back to the data sender; if the data is received but the data is received incorrectly, the generated response information
  • the value is NACK (Negative-Acknowledgement), and the NACK is sent back to the data sender. If no data is received, the generated response information is DTX (Discontinuous Transmission), and is not sent to the data sender. Feedback with explicit ACK information or NACK information.
  • the network side passes the PDSCH (Physical Downlink Shared Channel,
  • the physical downlink shared channel transmits data information to the user, and transmits control information to the user through a PDCCH (Physical Downlink Control Channel).
  • the configuration information needs to be indicated by the control information carried in the PDCCH.
  • the SPS-PDSCH Semi-Persistent Scheduling PDSCH
  • the initial configuration information is indicated by the PDCCH.
  • the retransmission configuration information may be indicated by using the previously received PDCCH or by the PDCCH received in the current subframe, and the release information is indicated by the PDCCH.
  • the user After receiving the PDSCH dynamically indicated by the PDCCH, and/or the PDCCH indicating the SPS-PDSCH release, and/or the SPS-PDSCH without the PDCCH dynamic indication, the user needs to feed back the ACK/NACK information to the network side.
  • the user equipment can feed back the response information of the downlink data reception to the network side in the uplink subframe through the PUCCH (Physical Uplink Control Channel).
  • PUCCH Physical Uplink Control Channel
  • a PUCCH channel for user equipment to feed back ACK/NACK information of downlink data reception to the network side is referred to as an uplink response channel.
  • Carrier Aggregation technology is selected to support wider bandwidth to meet the requirements of the International Telecommunication Union. Peak data rate requirements for fourth generation communication technologies.
  • the carrier aggregation technology spectrums of multiple component carriers are aggregated together to obtain a wider transmission bandwidth, where each component carrier may be configured to be compatible with the LTE system, and the spectrum of each component carrier may be phase. The contiguous spectrum of the neighbors can also be connected to only one of the component carriers for data transmission and reception.
  • the LTE-A user equipment can simultaneously access multiple component carriers for data transmission and reception according to its capabilities and service requirements.
  • the carrier aggregation technology is sometimes called the Spectrum Aggregation technology or the Bandwidth Extension technology.
  • each member carrier has an independent HARQ process, and the LTE-A user equipment can be configured differently.
  • the network side configures one primary downlink component carrier for each user, and the user can receive system information on the primary carrier; many The downlink component carriers are collectively referred to as the secondary downlink component carriers.
  • the user equipment can simultaneously access multiple downlink component carriers, and the PDSCH (Physical Downlink Shared Channel) on each downlink component carrier. The corresponding response information is fed back on the uplink response channel. Regardless of whether the user equipment accesses one or more uplink component carriers at the same time, the ACK/NACK information is always configured in one uplink component carrier feedback.
  • the M downlink subframes may be associated with a certain uplink subframe feedback response information. The value of M can be 1, 2, 3, 4 or 9. Therefore, for a carrier-aggregated TDD system, one uplink subframe needs to feed back ACK/NACK information corresponding to multiple downlink component carriers of one or more downlink subframes.
  • the number of uplink acknowledgement channels allocated to the user equipment is large, so that The uplink acknowledgement channel has a large overhead.
  • Embodiments of the present invention provide a method for transmitting a downlink allocation indication and a device thereof, so as to more accurately obtain a PDCCH loss condition on a secondary component carrier.
  • a method for transmitting a downlink allocation indication includes: generating, in a downlink subframe, a downlink allocation indication according to a sequence of a primary carrier downlink associated subframe after a secondary secondary carrier downlink associated subframe, and following a downlink subframe between different downlink subframes The chronological order generates a downlink allocation indication; and the generated downlink allocation indication is sent on the physical downlink control channel PDCCH.
  • a transmitting apparatus for downlink allocation indication comprising: a generating unit, configured to generate a downlink sub-indication in the order of a primary carrier downlink associated subframe after a secondary secondary carrier downlink associated subframe in a downlink subframe;
  • the generated downlink allocation indication is sent on the physical downlink control channel PDCCH.
  • the method and device for transmitting a downlink allocation indication generate the downlink allocation indication field in the order of the primary component carrier after the primary component carrier in one subframe, and do not invent the DAI of the primary component carrier PDCCH of the embodiment.
  • the last generated in the subframe may be convenient for the user equipment to detect whether there is a PDCCH loss on the secondary component carrier in the subframe by using the DAI field included in the PDCCH of the primary component carrier.
  • Embodiments of the present invention further provide a method and apparatus for feeding back response information, which not only reduces uplink ACK channel resources that need to be allocated for user equipment, but also reduces control channel overhead.
  • a method for feeding back the response information includes: detecting a last primary carrier downlink associated subframe of the physical downlink control channel PDCCH; acquiring an uplink acknowledgement channel allocated for the detected last primary carrier downlink associated subframe; The response information is fed back on the uplink response channel.
  • a feedback device for the response information comprising: a detecting unit, configured to detect a last primary carrier downlink associated subframe of the physical downlink control channel PDCCH; and an acquiring unit, configured to acquire a downlink primary subframe associated with the detected last primary carrier An allocated uplink response channel; a feedback unit, configured to feed back response information on the uplink response channel.
  • the method and device for feeding back the response information provided by the embodiment of the present invention, because the user equipment only selects the uplink response channel allocated for the downlink associated subframe on the last primary component carrier to feed back the response information, so only the primary component carrier is used.
  • the downlink associated subframe allocates an uplink acknowledgement channel, and does not allocate an uplink acknowledgement channel for the downlink associated subframe on the secondary component carrier, thereby significantly reducing the uplink acknowledgement channel resource that needs to be allocated for the user equipment, and reducing the control channel overhead.
  • Embodiments of the present invention further provide a method and apparatus for feeding back response information to improve downlink throughput.
  • a method for feeding back response information includes: detecting a last downlink subframe of a physical downlink control channel PDCCH; acquiring an uplink acknowledgement channel allocated for the last downlink subframe detected; and feeding back response information on the uplink acknowledgement channel .
  • a feedback device for the response information comprising: a detecting unit, configured to detect a last downlink subframe of the physical downlink control channel PDCCH; and an acquiring unit, configured to acquire the uplink acknowledgement channel allocated for the last downlink subframe detected; And a unit, configured to feed back response information on the uplink acknowledgement channel.
  • the base station is able to know the previous PDSCH position correctly received by the user equipment, and capable of receiving the uplink response channel allocated for the last downlink subframe of the physical downlink control channel PDCCH. Knowing that the user misses the subframe position of the PDCCH, the base station can avoid repeated transmission of the previous PDSCHs that the user equipment has correctly received, thereby improving the retransmission efficiency of the system and improving the downlink throughput of the system.
  • FIG. 1 is a schematic diagram of a subframe of carrier aggregation according to an embodiment of the present invention
  • FIG. 2 is a flowchart of a method for generating a DAI according to an embodiment of the present invention
  • FIG. 3 is a block diagram of a device for generating a DAI according to an embodiment of the present invention.
  • FIG. 4 is a flowchart of a method for selecting a response channel according to an embodiment of the present invention.
  • FIG. 5 is a block diagram of a device for selecting a response channel according to an embodiment of the present invention.
  • FIG. 6 is a flowchart of another method for selecting a response channel according to an embodiment of the present invention.
  • FIG. 7 is a block diagram of another apparatus for selecting a response channel according to an embodiment of the present invention.
  • FIG. 8 is a flowchart of a method for selecting a response channel according to Embodiment 1 of the present invention.
  • FIG. 9 is a flowchart of a method for selecting a response channel according to Embodiment 2 of the present invention.
  • FIG. 10 is a flowchart of a method for selecting a response channel according to Embodiment 3 of the present invention.
  • FIG. 11 is a flowchart of a method for selecting a response channel according to Embodiment 4 of the present invention.
  • FIG. 12 is a flowchart of a method for selecting a response channel according to Embodiment 5 of the present invention.
  • FIG. 13 is a block diagram of a device for selecting a response channel according to Embodiment 6 of the present invention.
  • Figure 14 is a block diagram showing another apparatus for selecting a response channel in Embodiment 6 of the present invention. detailed description
  • each downlink subframe of each downlink component carrier that is fed back to the same uplink acknowledgement channel of the same uplink subframe as the feedback response information is defined as a downlink associated subframe, and they are configured.
  • the set is defined as a downlink associated subframe set; the same downlink subframe includes one or more downlink associated subframes that work on multiple downlink component carriers; and the downlink associated subframe that operates on the primary downlink component carrier is called The primary carrier downlink associated subframe; the downlink associated subframe that operates on the secondary downlink component carrier is referred to as a secondary carrier downlink associated subframe.
  • Figure 1 shows an example of a carrier aggregation TDD system in which four downlink component carriers 1, 2, 3, 4 and 2 uplink component carriers 2, 3 are configured for the user equipment, and each downlink component carrier has The four associated downlink subframes n-kl, n-k2, n-k3, and n-k4, the ACK/NACK information corresponding to the associated downlink subframes are all fed back on the uplink subframe n of the uplink component carrier 2. Therefore, all of the downlink associated subframes that need to feed back ACK/NACK information on the same uplink subframe n constitute a downlink associated subframe set.
  • a first embodiment of the present invention provides a method for transmitting a Downlink Assignment Indication (DAI), which is mainly used in a carrier aggregation technology, and includes a primary component carrier configured for a user equipment in a downlink associated subframe set.
  • DAI Downlink Assignment Indication
  • the sending method of the embodiment of the present invention includes:
  • 201 Generate, in a downlink subframe, a downlink allocation indication according to a sequence of the primary carrier downlink associated subframe after the primary secondary carrier downlink associated subframe, and generate a downlink allocation indication according to the chronological order of the downlink subframes in different downlink subframes.
  • the downlink allocation indication may be generated according to the order of the secondary component carriers from small to large, or from large to small; or in one downlink All the secondary carrier downlink associated subframes in the subframe generate the downlink allocation indication according to the order of the center frequency of the secondary component carrier from low to high or high to low.
  • the DAI included in the PDCCH sent to a given user may be composed only of a part, and is obtained by counting the PDCCHs to be sent to the user in the downlink associated subframe set.
  • the specific counting manner includes: but is not limited to: counting the number of all PDCCHs sent in the same downlink subframe up to the current downlink associated subframe, or counting the total number of PDCCHs sent in all downlink associated subframes in the same downlink subframe, or counting The number of all PDCCHs transmitted in the downlink associated subframe set up to the current downlink associated subframe, or the statistics downlink associated subframe set The total number of PDCCHs transmitted on all downlink associated subframes up to the current downlink subframe.
  • the DAI included in the PDCCH sent to a given user may also be composed of two parts, and the generated DAI may also be composed of two parts, which are respectively recorded as DAI_F; is obtained by counting the PDCCH to be sent to the user within the downlink associated subframe set.
  • the DAI F is obtained by counting the PDCCHs to be sent in the downlink associated subframes of the different downlink component carriers in the same downlink subframe, and the DAI_T is required to be in the downlink associated subframes from different downlink subframes in the same downlink component carrier.
  • the transmitted PDCCH count is acquired.
  • the PDCCH is obtained by counting the PDCCH of the secondary carrier downlink associated subframe and the PDCCH of the downlink subframe of the primary carrier, and the counting manner includes: but not limited to: counting the current downlink subframe to the current The number of all PDCCHs transmitted in the downlink component carrier downlink associated subframe, or the total number of PDCCHs sent on the secondary carrier downlink associated subframe in the current downlink subframe, and the downlink correlation of the primary carrier in the downlink subframe associated subframe.
  • the subframe generation DAI is to count the total number of PDCCHs transmitted on the downlink associated subframes of all downlink component carriers in the current downlink subframe. For carrier aggregation FDD systems, only DAI_F can be included.
  • the downlink downlink indication channel is included in the physical downlink control channel.
  • the embodiment of the present invention further provides a DAI sending apparatus, which is mainly used in a carrier aggregation technology, and includes a primary component carrier and a secondary component carrier configured for a user equipment in a downlink associated subframe set, as shown in FIG. 3,
  • the transmitting device includes: a generating unit 31 and a transmitting unit 32.
  • the generating unit 31 is configured to generate a downlink allocation indication in a downlink subframe according to a sequence of a primary carrier downlink associated subframe after the first secondary carrier downlink associated subframe, and send the downlink control channel PDCCH on different downlink subframes.
  • the generated downlink allocation indication is configured to generate a downlink allocation indication in a downlink subframe according to a sequence of a primary carrier downlink associated subframe after the first secondary carrier downlink associated subframe, and send the downlink control channel PDCCH on different downlink subframes.
  • the element 21 further includes a first generating unit and a second generating unit, where the first generating unit is configured to use all the secondary carrier downlink associated subframes in one downlink subframe, in descending order of the number of the secondary component carrier, Or generating the downlink allocation indication in a sequence from a large to a small; the second generating unit, configured to use, in a downlink sub-frame, a sub-frame of all sub-carriers in a downlink sub-frame, in descending order of a center frequency of the sub-component carrier, Or generating the downlink allocation indication in an order from high to low. .
  • the embodiment of the present invention may perform statistics on the PDCCH, and the specific statistical manner may adopt the method described in the 201 procedure in FIG.
  • the DAI sending method and apparatus provided by the embodiment of the present invention generate the downlink allocation indication field in the order of the primary component carrier after the primary and secondary component carriers in one subframe, and the DAI of the primary component carrier PDCCH in different subframes is
  • the last generated in the subframe may be convenient for the user equipment to detect whether there is a PDCCH loss on the secondary component carrier in the subframe by using the DAI field included in the PDCCH of the primary component carrier.
  • the second embodiment of the present invention further provides a feedback method for a response channel, which is mainly used in a carrier aggregation technology, and includes a primary component carrier and a secondary component carrier configured for a user equipment in a downlink associated subframe set, as shown in FIG. 4 .
  • the method in the embodiment of the present invention includes:
  • Steps 401, 402; specifically, specifically, obtaining an uplink response channel may include the following:
  • the uplink acknowledgment channel allocated for the physical downlink control channel transmission or the semi-persistent scheduling physical downlink shared channel transmission in the sub-frame of the secondary carrier in the downlink subframe is used as the uplink response of the feedback response information.
  • PDCCH or SPS-PDSCH transmission or the user equipment receives the PDCCH or SPS-PDSCH transmission on the primary carrier downlink associated subframe and detects that the PDCCH is lost on the secondary carrier downlink associated subframe, then the primary carrier in the downlink subframe is downlinked.
  • the physical downlink control channel transmission on the associated subframe or the uplink acknowledgement channel allocated by the semi-persistent scheduling physical downlink shared channel transmission is used as the uplink response channel of the feedback response information.
  • the uplink answer channel that is, DTX
  • the explicit ACK or NACK information is not fed back to the network side.
  • the uplink acknowledgment channel corresponds to the PDSCH indicated by the PDCCH or the PDCCH indicating the end of the downlink semi-persistent scheduling on the primary carrier downlink association subframe
  • the CCE resources occupied by the PDCCH are mapped in a certain manner, and the mapping manner may be
  • the mapping manner may be For the mapping of the resources occupied by the PDCCH defined by the LTE R8/R9 to the uplink response channel resources, refer to the TS 36.213 protocol.
  • the uplink acknowledgement channel is allocated by the base station by explicit signaling if it corresponds to the SPS-PDSCH on the primary carrier downlink associated subframe.
  • the uplink acknowledgement channel if corresponding to the PDCCH on the sub-frame of the sub-carrier, the corresponding uplink acknowledgement channel may be allocated by the base station by using a display signaling manner; wherein the PDCCH included in the PDCCH of the sub-frame of the sub-carrier is associated with the TPC (Transmission)
  • the Power Command, transmit power command can be used as the uplink acknowledgement channel resource indication command word, and the base station acts as an explicit signaling to further indicate the uplink acknowledgement channel resource allocated to the user equipment.
  • downlink association is preferably performed for all secondary carriers in one downlink subframe.
  • the subframes are assigned the same uplink acknowledgement channel.
  • the loss of the PDCCH in each downlink subframe is determined by the DAI carried in the PDCCH transmitted in each downlink associated subframe.
  • the network side is in the downlink association with the current downlink subframe.
  • the total number of PDCCHs sent by the user equipment in the subframe indicates the total number of PDCCHs sent to a given user in the downlink subframe.
  • the user equipment is used to calculate the bound ACK/NACK information bits.
  • the specific implementation may adopt, but is not limited to, the following method for calculating ACK/NACK information bits:
  • the first method is as follows: for the downlink associated subframe corresponding to the obtained uplink response channel, and all downlink associated subframes before the downlink associated subframe, or for all downlink associated subframes in the downlink associated subframe set, The method generates feedback ACK/NACK information, specifically:
  • the DTX is fed back to the network side, that is, there is no explicit ACK or NACK information feedback;
  • the indication is semi-continuous Scheduling the physical downlink control channel of the physical downlink shared channel suspension, if the received mth codeword (m is 1 or 2) and/or the ACK corresponding to the physical downlink control channel indicating the semi-persistent scheduling physical downlink shared channel suspension Any one of the NACK messages is
  • the mth bit takes the value of NACK; if the received mth codeword (m is 1 or 2) and/or the physical downlink control channel indicating the semi-persistent scheduling physical downlink shared channel suspension is ACK, m bits take the value ACK.
  • Method 2 For the downlink associated subframe corresponding to the acquired uplink response channel and all downlink associated subframes before the downlink associated subframe, or for the downlink associated subframe set
  • an ACK/NACK information bit is first obtained by binding the ACK/NACK information corresponding to the plurality of codewords according to a logical AND rule. If the preceding r (r is a positive integer) ACK/NACK information bits in the ACK/NACK information bits after the binding are all ACK, then 2-bit information representing the r ACK information is generated, if the first ACK after binding The value of the /NACK information bit is NACK, then the representation is generated.
  • the embodiment of the present invention further provides a feedback device for the response channel.
  • the feedback device 50 includes: a detecting unit 51, an obtaining unit 52, and a feedback unit 53.
  • the detecting unit 51 is configured to detect a last primary carrier downlink associated subframe of the physical downlink control channel PDCCH;
  • the obtaining unit 52 is configured to acquire an uplink acknowledgement channel allocated for the detected last primary carrier downlink associated subframe
  • the feedback unit 53 is configured to feed back response information on the uplink response channel.
  • the specific calculation method of the response information in the feedback unit 53 is as detailed in step 403, and details are not described herein again.
  • the feedback device 50 further includes a receiving unit (not shown), configured to receive a downlink allocation indication in the PDCCH, where the downlink allocation indication is generated according to the following manner: according to the first secondary carrier in one downlink subframe The sequential downlink allocation indication of the primary carrier downlink associated subframe after the downlink associated subframe.
  • a receiving unit (not shown), configured to receive a downlink allocation indication in the PDCCH, where the downlink allocation indication is generated according to the following manner: according to the first secondary carrier in one downlink subframe The sequential downlink allocation indication of the primary carrier downlink associated subframe after the downlink associated subframe.
  • the uplink acknowledgement channel is allocated only to the downlink associated subframe on the primary component carrier, and is not a secondary member.
  • the downlink associated subframe on the carrier allocates the uplink acknowledgement channel, thus significantly reducing the uplink acknowledgement channel resources that need to be allocated for the user equipment, and reducing the control channel overhead.
  • the third embodiment of the present invention further provides another feedback method for the response channel, which may be applied to the single carrier technology or the carrier aggregation technology.
  • the method includes: 601. Detect a last downlink subframe of a physical downlink control channel PDCCH. The last downlink subframe of the physical downlink control channel PDCCH is specifically included;
  • the last downlink subframe of the physical downlink control channel PDCCH is detected in the downlink associated subframe set; see the following embodiment for a detailed description.
  • the embodiment of the present invention further provides a feedback device, which can be used in a single carrier technology or in a carrier aggregation technology.
  • the feedback device 70 includes: a detecting unit 71, The unit 72 and the feedback unit 73 are obtained.
  • the detecting unit 71 is configured to detect a last downlink subframe of the physical downlink control channel PDCCH;
  • the obtaining unit 72 is configured to acquire an uplink response channel of the last downlink subframe allocation that is detected;
  • the feedback unit 73 is configured to feed back response information on the uplink response channel.
  • the detecting unit 71 includes a first detecting unit 74, configured to detect the last downlink subframe of the physical downlink control channel PDCCH in the downlink associated subframe set;
  • the last downlink associated subframe of the PDCCH is the last downlink associated subframe of the PDCCH.
  • the second detecting unit 75 further includes any one of the following modules:
  • the detecting module 1 is configured to detect, after detecting the PDCCH loss in the single-carrier TDD system or the multi-carrier FDD system, and detecting the last downlink associated subframe of the PDCCH before the PDCCH is lost;
  • the detecting module 2 is configured to: after detecting the PDCCH loss in the carrier aggregation TDD system, detecting the last downlink associated subframe of the PDCCH on the primary component carrier before detecting the PDCCH loss;
  • the detecting module 3 is configured to detect, after detecting the PDCCH loss in the carrier aggregation TDD system, and detecting the last downlink associated subframe of the PDCCH before detecting the PDCCH loss.
  • the base station is able to know the previous PDSCH position correctly received by the user equipment, and capable of receiving the uplink response channel allocated for the last downlink subframe of the physical downlink control channel PDCCH. Knowing that the user misses the subframe position of the PDCCH, the base station can avoid repeated transmission of the previous PDSCHs that the user equipment has correctly received, thereby improving the retransmission efficiency of the system and improving the downlink throughput of the system.
  • the application scenario of the embodiment of the present invention is: a communication system using a carrier aggregation technology, for example, a TDD or an FDD system.
  • the solution adopted by the embodiment of the present invention is: using the user equipment to receive the PDCCH on the primary component carrier.
  • An uplink acknowledgement channel allocated by the downlink associated subframe is used to feed back the response information.
  • the feedback method of the response information provided by the embodiment of the present invention includes:
  • the network side generates the downlink allocation indication in the sequence of the primary carrier downlink associated subframe after the first secondary carrier downlink associated subframe in a downlink subframe, and generates the downlink subframe according to the chronological order of the downlink subframes. Downstream allocation indication.
  • the network side sends a physical downlink control channel in a downlink associated subframe set, where the physical downlink control channel includes the downlink allocation indication.
  • the DAI (Downlink Assignment Index) included in each PDCCH is generated in the order of the primary carrier downlink associated subframe after the first secondary carrier downlink associated subframe in one downlink subframe.
  • Downlink allocation indication pressing between different downlink subframes
  • the downlink allocation indication is generated in chronological order of the downlink subframes.
  • the method for generating DAI provided by the present invention has the following beneficial effects: If there is PDCCH transmission on the primary carrier downlink associated subframe in one downlink subframe, the DAI of the primary carrier downlink associated subframe PDCCH is in the downlink subframe.
  • the eNB is in the last generation, and the DAI is generated by the user equipment, so that the user equipment obtains the PDCCH loss in the secondary carrier downlink associated subframe in the downlink associated subframe set by using the DAI included in the primary carrier downlink associated subframe PDCCH. Helps correctly feedback the response information on the response channel allocated for the primary carrier downlink associated subframe.
  • the DAIs included in the PDCCH may be generated in any predetermined order, such as in the order of member carrier numbers from small to large or large to small, or according to the center of the component carrier.
  • the carrier frequency is from low to high or high to low.
  • the DAI included in the PDCCH sent to a given user may be composed of only a part, and is obtained by counting the PDCCHs to be sent to the user in the downlink associated subframe set.
  • the specific counting manner includes: but is not limited to: counting the number of all PDCCHs sent in the same downlink subframe up to the current downlink associated subframe, or counting the total number of PDCCHs sent in all downlink associated subframes in the same downlink subframe, or counting The number of all PDCCHs transmitted in the downlink associated subframe set up to the current downlink associated subframe, or the total number of PDCCHs transmitted in all downlink associated subframes in the downlink associated subframe set up to the current downlink subframe.
  • the DAI included in the PDCCH sent to a given user may also be composed of two parts, and the generated DAI may also be composed of two parts, which are respectively recorded as DAI_F; is obtained by counting the PDCCH to be sent to the user within the downlink associated subframe set.
  • the DAI F is obtained by counting the PDCCHs to be sent in the downlink associated subframes of the different downlink component carriers in the same downlink subframe, and the DAI_T is required to be in the downlink associated subframes from different downlink subframes in the same downlink component carrier.
  • the transmitted PDCCH count is acquired.
  • the PDCCH is obtained by counting the PDCCH of the secondary carrier downlink associated subframe and the PDCCH of the downlink subframe of the primary carrier, and the counting manner includes: but not limited to: counting the current downlink subframe to the current The number of all PDCCHs transmitted until the downlink component carrier downlink associated subframe, or the current downlink subframe secondary payload when the DAI is generated for the secondary carrier downlink associated subframe
  • the total number of PDCCHs transmitted on the downlink downlink associated subframes and the DAI generated for the primary carrier downlink associated subframes are the total number of PDCCHs transmitted on the downlink associated subframes of all downlink component carriers in the current downlink subframe.
  • DAI_F can be included.
  • the downlink component carrier 1 is the primary component carrier
  • the downlink component carriers 2, 3, and 4 are the secondary component carriers.
  • the DAI is composed of a part and has a length of 2 bits. It is assumed that the specific counting mode of the PDCCH is the number of all PDCCHs sent in the downlink downlink associated subframe set up to the current downlink associated subframe (the same carrier subcarrier downlink associated sub-frame)
  • the frames are in order of carrier numbers from small to large).
  • the number of PDCCH counts when the DAI is generated is 3, 1, and 2, respectively. 6, 6, 4, 9, 7, 8, then the corresponding DAI values are 3, 1, 2, 2, 4, 1, 1, 3, 4.
  • the network side allocates a corresponding uplink acknowledgement channel to the physical downlink control channel and/or the semi-persistent scheduling physical downlink shared channel in the downlink associated subframe of the downlink associated subframe set.
  • the uplink acknowledgment channel allocated for the PDCCH transmitted on the primary carrier in the downlink associated subframe set may be obtained by mapping the CCE (Control Channel Elements) resources occupied by the PDCCH in a certain manner, and the mapping manner may be For the mapping of the CCE resources occupied by the PDCCH defined by the LTE R8/R9 to the uplink response channel resources, refer to the TS 36.213 protocol.
  • the uplink response channel allocated for the SPS-PDSCH is notified to the user equipment by the network side through explicit signaling.
  • the corresponding uplink acknowledgement channel is not allocated to the PDCCH and/or the semi-persistent scheduling physical downlink shared channel transmitted on the secondary carrier in the downlink associated subframe set.
  • the user equipment receives the physical downlink control channel and/or the semi-sustained physical downlink shared channel in the downlink associated subframe set.
  • the user equipment acquires an uplink response channel that feeds back ACK/NACK information, specifically,
  • the uplink acknowledgement channel allocated in the last downlink subframe of the physical downlink control channel is received as the uplink acknowledgement channel of the feedback response information on the primary component carrier.
  • the uplink response channel serves as an uplink response channel for feedback response information. That is, the uplink response channel may be an uplink response channel allocated by the network side for the received PDCCH or SPS-PDSCH.
  • the user equipment can also receive PDCCH transmission and/or SPS-PDSCH transmission on the secondary component carrier.
  • the corresponding uplink acknowledgement channel is not allocated for the PDCCH or SPS-PDSCH on the secondary carrier downlink associated subframe.
  • the uplink response is not allocated whether the secondary component carrier receives the PDCCH and/or receives the SPS-PDSCH transmission.
  • the channel from the network side, does not feed back explicit ACK or NACK information.
  • the obtained uplink acknowledgment channel if it is the corresponding uplink acknowledgment channel of the PDCCH, may be obtained by mapping the CCE resources occupied by the PDCCH in a certain manner, and the mapping mode may be the CCE resource occupied by the PDCCH defined by the LTE R8/R9 to the uplink.
  • the mapping method of the response channel resources refer to the TS 36.213 protocol.
  • the uplink response channel obtained above is notified to the user equipment by the network side by explicit signaling if it is the corresponding uplink response channel of the allocated SPS-PDSCH.
  • the user equipment calculates an ACK/NACK information bit.
  • the following method for calculating an ACK/NACK information bit may be used:
  • Method 1 For the downlink associated subframe corresponding to the acquired uplink response channel, and all downlink associated subframes before the downlink associated subframe, or for the downlink associated subframe set For all downlink associated subframes, the following method is used to generate the ACK/NACK information of the feedback, specifically: (1) when one or more physical downlink control channels are found to be lost, the DTX is fed back to the network side, that is, there is no explicit ACK or NACK information feedback; (2) for the received physical downlink shared channel and/or the physical downlink control channel indicating the semi-persistent scheduling physical downlink shared channel suspension, if the received mth codeword (m takes a value of 1 or 2) and And if any one of the ACK/NACK information corresponding to the physical downlink control channel that is semi-persistently scheduled to be physically suspended is a NACK, the mth bit takes a value of NACK; if the received mth codeword (m value) The physical downlink control channel that is 1 or 2) and/or indicates that the
  • Method 2 for the downlink associated subframe corresponding to the obtained uplink response channel and all downlink associated subframes before the downlink associated subframe, or for one or more physics found in the downlink associated subframe set
  • a specific 2-bit information indicating DTX is generated; (2) when one or more physical downlink control channels are not found to be lost, if there are multiple codeword transmissions in one physical downlink shared channel, firstly The ACK/NACK information corresponding to the plurality of codewords is coded to obtain an ACK/NACK information bit according to a logical AND rule.
  • 2-bit information representing the r ACK information is generated, if the first ACK after the binding The value of the /NACK information bit is NACK, then the 2-bit information characterizing the NACK is generated; or if the ACK/NACK information bits after the binding are all ACK and there are a total of R (R is a positive integer) ACK, then the R are generated.
  • 2-bit information of the ACK information otherwise generating 2-bit information characterizing the NACK.
  • the 2-bit information characterizing the NACK may be the same as the 2-bit information characterizing the DTX.
  • the user equipment feeds back ACK/NACK information bits through the selected uplink response channel.
  • the embodiment of the present invention generates the downlink allocation indication according to the primary carrier after the primary secondary carrier downlink associated subframe in a downlink subframe, so that the user equipment associates the subframe PDCCH by using the primary carrier downlink.
  • the included DAI obtains the PDCCH loss situation on the secondary carrier downlink associated subframe in the downlink associated subframe set, and helps to correctly feedback the response information on the acknowledgement channel allocated for the primary carrier downlink associated subframe.
  • the embodiment of the present invention Only the uplink acknowledgement channel is allocated to the downlink sub-frame of the primary carrier, and the uplink acknowledgement channel is not required to be allocated to the secondary carrier downlink subframe, which reduces the overhead of the uplink response channel.
  • the method for generating the DAI used in the embodiment of the present invention can be applied to other scenarios, for example, in the scenario of allocating an uplink response channel to the primary component carrier, for example, assigning different uplink responses to different primary carrier downlink associated subframes.
  • the channel allocates the same uplink acknowledgement channel to all the secondary carrier downlink associated subframes in the same downlink subframe.
  • the application scenario of the embodiment of the present invention is: A TDD communication system working in a carrier aggregation technology.
  • the solution adopted by the embodiment of the present invention is to use the uplink response channel allocated for receiving the last downlink subframe of the PDCCH by the user equipment to feed back the response information.
  • the method for selecting a response channel provided by the embodiment of the present invention includes:
  • the user equipment receives a physical downlink control channel or a semi-persistent scheduling physical downlink shared channel in each downlink associated subframe in the downlink associated subframe set.
  • the specific user equipment receives the PDCCH or SPS-PDSCH on the secondary carrier downlink associated subframe, and needs to receive the PDCCH or SPS-PDSCH on the primary carrier downlink associated subframe.
  • the user equipment acquires an uplink response channel for uplink ACK/NACK information transmission.
  • acquiring the uplink response channel may include the following:
  • the uplink acknowledgment channel allocated for the physical downlink control channel transmission or the semi-persistent scheduling physical downlink shared channel transmission in the downlink subframe of the subcarrier in the downlink subframe is used as the uplink acknowledgment channel of the feedback response information;
  • PDCCH or SPS-PDSCH transmission or the user equipment receives the PDCCH or SPS-PDSCH transmission on the primary carrier downlink associated subframe and detects that the PDCCH is lost on the secondary carrier downlink associated subframe, then the primary carrier in the downlink subframe is downlinked.
  • the physical downlink control channel transmission on the associated subframe or the uplink acknowledgement channel allocated by the semi-persistent scheduling physical downlink shared channel transmission is used as the uplink response channel of the feedback response information.
  • the uplink answer channel that is, DTX
  • the explicit ACK or NACK information is not fed back to the network side.
  • the uplink acknowledgment channel corresponds to the PDSCH indicated by the PDCCH or the PDCCH indicating the end of the downlink semi-persistent scheduling on the primary carrier downlink association subframe
  • the CCE resources occupied by the PDCCH are mapped in a certain manner, and the mapping manner may be
  • the mapping manner may be For the mapping of the resources occupied by the PDCCH defined by the LTE R8/R9 to the uplink response channel resources, refer to the TS 36.213 protocol.
  • the uplink acknowledgement channel is allocated by the base station by explicit signaling if it corresponds to the SPS-PDSCH on the primary carrier downlink associated subframe.
  • the uplink acknowledgement channel if corresponding to the PDCCH on the sub-frame of the sub-carrier, the corresponding uplink acknowledgement channel may be allocated by the base station by using a display signaling manner; wherein the PDCCH included in the PDCCH of the sub-frame of the sub-carrier is associated with the TPC (Transmission)
  • the Power Command, transmit power command can be used as the uplink acknowledgement channel resource indication command word, and the base station acts as an explicit signaling to further indicate the uplink acknowledgement channel resource allocated to the user equipment.
  • downlink association is preferably performed for all secondary carriers in one downlink subframe.
  • the subframes are assigned the same uplink acknowledgement channel.
  • the loss of the PDCCH in each downlink subframe is determined by the DAI carried in the PDCCH transmitted in each downlink associated subframe.
  • the DAI in the downlink associated subframe set of the embodiment of the present invention indicates the total number of PDCCHs that are sent by the network side to the user equipment in all the downlink associated subframes until the current downlink subframe. In this way, the difference between the DAI value of a downlink subframe and the DAI value of the previous downlink subframe indicates that the downlink subframe is sent to a given user.
  • the total number of PDCCHs may also adopt the method provided in the process of 801 to 802 in Embodiment 1.
  • the user equipment calculates an ACK/NACK information bit.
  • a method for calculating an ACK/NACK information bit provided in the process of the 806 of Embodiment 1 may be used.
  • the user equipment feeds back an ACK/NACK information bit on the selected uplink acknowledgement channel.
  • the same uplink acknowledgement channel is allocated to the PDCCH or the SPS-PDSCH in the downlink sub-frames of the multiple sub-carriers in the same downlink subframe. Therefore, the uplink control channel overhead occupied by the system is small.
  • the uplink acknowledgement channel is allocated to the secondary carrier downlink associated subframe, in the downlink associated subframe set, if the primary carrier downlink associated subframe occurs, neither the PDCCH transmission nor the SPS-PDSCH transmission is received, and If the PDCCH transmission is received or the SPS-PDSCH transmission is received on the secondary carrier downlink associated subframe, the response information may be fed back by using the uplink response channel allocated for the secondary carrier downlink associated subframe, which may avoid directing as in the first embodiment. The response information is fed back. Therefore, compared with the first embodiment, the network side does not need to schedule data on the primary carrier downlink associated subframe as much as possible, which increases the scheduling flexibility of the system.
  • the application scenarios of the embodiments of the present invention are: a TDD communication system applied to a single carrier or an FDD communication system operating in a multi-carrier.
  • the method for feeding back response information provided by the embodiment of the present invention includes:
  • the user equipment receives a physical downlink control channel in a downlink associated subframe set.
  • the PDCCH or the SPS-PDSCH is received in each downlink subframe.
  • the downlink-related subframe set includes multiple downlink-related subframes on the same downlink component carrier.
  • the downlink associated subframe set includes multiple downlink associated subframes in the same downlink subframe.
  • the received PDCCH may be used to indicate PDSCH transmission, Or indicating that the downlink semi-persistent scheduling terminates the physical downlink shared channel.
  • the user equipment acquires, as the uplink acknowledgement channel that is allocated to the last downlink associated subframe of the PDCCH before the detection of the loss, The uplink response channel that feeds back the response information.
  • the downlink associated subframe set when the physical downlink control channel loss is detected, acquiring an uplink response channel allocated for the last downlink associated subframe that receives the PDCCH before the detecting the physical downlink control channel is lost.
  • An uplink response channel as feedback response information.
  • the embodiment of the present invention further includes: when detecting that the first physical downlink control channel sent in the downlink associated subframe set is lost, if the SPS-PDSCH is received in the downlink associated subframe set, the acquiring is to receive the SPS- The uplink acknowledgement channel allocated by the last downlink associated subframe of the PDSCH is used as an uplink acknowledgement channel for feedback response information; if no SPS-PDSCH is received in the downlink associated subframe set, no explicit ACK or NACK is fed back to the network side. information.
  • the embodiment of the present invention further includes: when the physical downlink control channel loss is not detected in the downlink associated subframe set, acquiring an uplink acknowledgement channel allocated for receiving the last downlink associated subframe of the PDCCH as the uplink of the feedback response information If the SPS-PDSCH is received, the uplink response channel allocated for receiving the last downlink associated subframe of the SPS-PDSCH is used as the uplink response channel of the feedback response information; if neither the PDCCH nor the PDCCH is received, The SPS-PDSCH does not allocate an uplink acknowledgement channel and does not feed back explicit ACK or NACK information to the network side.
  • the loss of the PDCCH in each downlink subframe is determined by the DAI carried in the PDCCH transmitted in each downlink associated subframe.
  • the PDCCH includes a total number of PDCCHs transmitted within the PDCCH to the current downlink-related subframe.
  • the DAI included in the PDCCH may be generated in any predetermined order, such as according to the downlink member carrier number.
  • DAI indicates that the downlink associated subframe set indicates the transmission to the current downlink associated subframe.
  • the uplink response channel corresponds to the PDCCH on the primary component carrier (the primary carrier carrier is the single carrier for the single carrier TDD system)
  • the CCE resources occupied by the PDCCH are mapped in a certain manner.
  • the mapping mode may be a mapping manner of the PDCCH-resource-to-uplink acknowledgment channel resource defined by the LTE R8/R9, and may refer to the TS 36.213 protocol.
  • the uplink acknowledgment channel corresponds to the SPS-PDSCH transmission or the sub-component carrier.
  • the PDCCH is allocated by the network side through explicit signaling.
  • the user equipment calculates an ACK/NACK information bit, and the method for calculating the ACK/NACK information bit provided in the process of the 806 of Embodiment 1 may be adopted in the specific implementation.
  • the user equipment feeds back an ACK/NACK information bit on the selected uplink acknowledgement channel.
  • the network side can determine, by using the uplink response channel used by the user equipment, which PDCCHs in the downlink association subframes in the downlink association subframe set are correctly received by the user equipment, and therefore, if the PDCCH is needed, The PDSCH indicated by the PDCCH is retransmitted, and the network side can improve the retransmission efficiency by adaptively adjusting the redundancy version, thereby improving the throughput of the system.
  • the application scenario of the embodiment of the present invention is: A TDD communication system using carrier aggregation technology.
  • the solution adopted by the embodiment of the present invention in the scenario is: using the uplink acknowledgement channel feedback response information allocated by the user equipment to receive the last downlink associated subframe of the PDCCH before the primary component carrier receives the PDCCH loss.
  • the feedback method of the response information provided by the embodiment of the present invention includes:
  • the downlink associated subframe set shown in FIG. 1 is taken as an example.
  • the downlink component carrier 1 is the primary component carrier, and the downlink component carriers 2, 3, and 4 are the secondary component carriers.
  • each downlink associated subframe in the downlink associated subframe set needs to be received, and the physical downlink control channel (PDCCH) or half on the secondary carrier downlink associated subframe is specifically received.
  • the physical downlink shared channel (SPS-PDSCH) is continuously scheduled, and the PDCCH or SPS-PDSCH on the primary carrier downlink associated subframe needs to be received.
  • the user equipment In order to feed back the response information to the network side, after detecting the loss of the physical downlink control channel transmission, the user equipment acquires the last downlink associated subframe allocated by the primary component carrier before receiving the PDCCH before the detected loss.
  • the uplink response channel serves as an uplink response channel for feedback response information.
  • the uplink acknowledgment channel is obtained. The following may occur: First, in the downlink associated subframe set, if the PDCCH is received on the primary carrier downlink associated subframe and is in a downlink associated subframe After receiving the PDCCH loss, the uplink response channel allocated in the last downlink associated subframe of the PDCCH received by the primary component carrier before receiving the PDCCH loss is used as the feedback response information, whether the primary component carrier also receives the SPS-PDSCH. Uplink response channel.
  • the acquisition is performed.
  • the uplink response channel allocated for receiving the last downlink associated subframe of the SPS-PDSCH is used as the uplink response channel of the feedback response information; if the SPS-PDSCH is not received, the explicit ACK or NACK information is not fed back to the network side.
  • the PDCCH is received on the primary component carrier regardless of whether the SPS-PDSCH is also received.
  • the uplink acknowledgement channel allocated by the last downlink associated subframe is used as the uplink acknowledgement channel of the feedback response information.
  • the uplink acknowledgement channel allocated by the last downlink associated subframe of the SPS-PDSCH serves as an uplink acknowledgement channel for feedback response information.
  • the primary component carrier does not receive the SPS-PDSCH or the PDCCH, whether the PDCCH and/or the PDCCH are received on the secondary component carrier
  • the user equipment Upon receiving the SPS-PDSCH, the user equipment does not feed back explicit ACK or NACK information to the network side.
  • the uplink response channel if corresponding to the PDCCH on the primary carrier downlink association subframe, the CCE resource occupied by the PDCCH is obtained by mapping in a certain manner, and the mapping mode may be the resource occupied by the PDCCH defined by the LTE R8/R9 to the uplink response channel resource.
  • the mapping method is specifically referred to the TS 36.213 protocol.
  • the uplink acknowledgement channel is allocated by the network side by an explicit signaling mode if it corresponds to the PDCCH on the SPS-PDSCH or the subcarrier downlink associated subframe in the primary carrier downlink associated subframe. For the PDCCH or SPS-PDSCH on the subcarrier downlink associated subframe, no corresponding uplink acknowledgement channel is allocated.
  • the method provided in the process of the 801 of the first embodiment is used in the specific implementation. That is, the downlink allocation indication indication is generated in the order of the primary carrier downlink associated subframe after the first subcarrier downlink associated subframe in one downlink subframe.
  • the downlink allocation indication field may be generated in descending order of the number of the secondary component carriers, or from the largest to the smallest; or All downlink subordinate downlink subframes in one downlink subframe are generated in descending order of the center frequency of the secondary component carrier, or from high to low.
  • the user equipment calculates an ACK/NACK information bit.
  • a method for calculating an ACK/NACK information bit provided in the process of the 806 of Embodiment 1 may be used.
  • the user equipment feeds back an ACK/NACK information bit on the selected uplink response channel.
  • the advantages of Inventive Embodiment 1 and Inventive Embodiment 3 can be simultaneously obtained.
  • the side since the network side only allocates the corresponding uplink response channel for the downlink sub-frame of the main carrier, it is not necessary to allocate the uplink response channel for the sub-carrier downlink-related subframe, which reduces the overhead of the uplink response channel;
  • the side may determine, by using an uplink acknowledgement channel used by the user equipment, which downlink associated subframes in the downlink associated subframe set
  • the PDCCH is correctly received by the user equipment. Therefore, if the PDSCH indicated by the part of the PDCCH needs to be retransmitted, the network side can improve the retransmission efficiency by adaptively adjusting the redundancy version, thereby improving the throughput of the system.
  • the application scenario of the embodiment of the present invention is: a TDD communication system using a carrier aggregation technology.
  • the solution adopted by the embodiment of the present invention is: using, before the user equipment receives the PDCCH loss in the downlink associated subframe set, The downlink associated subframe set receives the uplink acknowledgement channel feedback response information allocated by the last downlink associated subframe of the PDCCH.
  • the feedback method of the response information includes:
  • the specific user equipment detects the PDCCH transmission or the SPS-PDSCH transmission on the secondary component carrier, and needs to detect the PDCCH transmission or the SPS-PDSCH transmission on the primary component carrier.
  • the physical downlink control channel may be used to indicate physical downlink shared channel transmission, or to indicate termination of the downlink semi-persistent scheduling physical downlink shared channel.
  • the user equipment in order to feed back the response information to the network side, after receiving the physical downlink control channel loss, acquires the last downlink associated subframe allocation that receives the physical downlink control channel before the received physical downlink control channel is lost.
  • the uplink acknowledgement channel feedback response information in order to feed back the response information to the network side, after receiving the physical downlink control channel loss, the user equipment acquires the last downlink associated subframe allocation that receives the physical downlink control channel before the received physical downlink control channel is lost.
  • the uplink acknowledgement channel feedback response information in order to feed back the response information to the network side, after receiving the physical downlink control channel loss.
  • the uplink acknowledgement channel is obtained. The following may occur: First, in the downlink associated subframe set, if the physical downlink control channel is detected to be lost, the acquired physical downlink control channel is lost. The uplink acknowledgement channel allocated by the last downlink associated subframe of the physical downlink control channel is received to feed back the response information. Further, if the first physical downlink control channel sent in the downlink associated subframe set is detected to be lost, if the SPS-PDSCH is received in the downlink associated subframe set, the last downlink associated child that receives the SPS-PDSCH is obtained. The uplink acknowledgement channel allocated by the frame serves as an uplink acknowledgement channel for feedback response information; if the SPS-PDSCH is not received, no explicit ACK is fed back to the network side or NACK information.
  • the uplink acknowledgement channel allocated for receiving the last downlink associated subframe of the PDCCH is used as the feedback response information.
  • Uplink response channel if only the SPS-PDSCH is received in the downlink associated subframe set, and it is not possible to determine whether there is PDCCH loss through the reception of the DAI, then the last downlink of the SPS-PDSCH is received on the primary component carrier.
  • the uplink response channel allocated by the associated subframe is used as an uplink response channel for feedback response information.
  • the uplink acknowledgement channel is not allocated, and the explicit ACK or NACK information is not fed back to the network side.
  • the uplink acknowledgment channel corresponds to the PDSCH indicated by the PDCCH or the PDCCH indicating the end of the downlink semi-persistent scheduling on the primary carrier downlink association subframe
  • the CCE resources occupied by the PDCCH are mapped in a certain manner, and the mapping manner may be
  • the mapping manner may be For the mapping of the resources occupied by the PDCCH defined by the LTE R8/R9 to the uplink response channel resources, refer to the TS 36.213 protocol.
  • the uplink acknowledgement channel is allocated by the base station by explicit signaling if it corresponds to the SPS-PDSCH on the primary carrier downlink associated subframe.
  • the uplink acknowledgement channel if corresponding to the PDCCH on the sub-frame of the sub-carrier, the corresponding uplink acknowledgement channel may be allocated by the base station by using a display signaling manner; wherein the PDCCH included in the PDCCH of the sub-frame of the sub-carrier is associated with the TPC (Transmission)
  • the Power Command, transmit power command can be used as the uplink acknowledgement channel resource indication command word, and the base station acts as an explicit signaling to further indicate the uplink acknowledgement channel resource allocated to the user equipment.
  • downlink association is preferably performed for all secondary carriers in one downlink subframe.
  • the subframes are assigned the same uplink acknowledgement channel.
  • the loss of the PDCCH in each downlink subframe is determined by the DAI carried in the PDCCH transmitted in each downlink associated subframe.
  • DAI of the embodiment of the invention Preferably, the total number of PDCCHs that are sent by the network side to the user equipment in all downlink associated subframes before the current downlink subframe is indicated in the downlink associated subframe set.
  • the difference between the DAI value of one downlink subframe and the DAI value of the previous downlink subframe indicates the total number of PDCCHs sent to a given user in the downlink subframe.
  • the DAI generation method in this embodiment may also adopt the method provided in the process of 801 to 802 in Embodiment 1.
  • the user equipment calculates an ACK/NACK information bit.
  • a method for calculating an ACK/NACK information bit provided in the process of the 806 of Embodiment 1 may be used.
  • the user equipment feeds back an ACK/NACK information bit on the selected uplink response channel.
  • the PDCCH on the downlink associated subframes in the downlink associated subframe set is correctly received by the user equipment by using the uplink acknowledgement channel used by the user equipment, so if The PDSCH indicated by the partial PDCCH is retransmitted, and the network side can improve the retransmission efficiency by adaptively adjusting the redundancy version, thereby improving the throughput of the system.
  • the network side allocates the same uplink acknowledgement channel to the PDCCH or the SPS-PDSCH on multiple secondary member carriers in the same downlink subframe. Therefore, the uplink control channel overhead occupied by the system is small.
  • the network side can determine that the PDCCH on the downlink associated subframes in the downlink associated subframe set is correctly received by the user equipment by using the uplink acknowledgement channel used by the user equipment. Therefore, if the PDSCH indicated by the partial PDCCH is required, For retransmission, the network side can improve the retransmission efficiency and improve the system throughput by adaptively adjusting the redundancy version.
  • the embodiment of the present invention further provides a device for selecting a response channel, which is mainly used in a carrier aggregation technology, and includes a primary component carrier and a secondary component carrier configured for a user equipment in a downlink associated subframe set, as shown in FIG.
  • the feedback device includes: a first receiving unit 131 and a first acquiring unit 132.
  • the first receiving unit 131 is configured to receive physical downlink control channel transmission or semi-persistent scheduling physical downlink shared channel transmission on the secondary component carrier in each downlink subframe, and receive physical downlink control channel transmission on the primary component carrier or The semi-persistent scheduling physical downlink shared channel transmission; the first obtaining unit 132 is configured to be within the last downlink subframe in the last subframe in which the physical downlink control channel transmission or the semi-persistent scheduling physical downlink shared channel transmission is received An uplink response channel allocated by the primary component carrier and/or an uplink response channel allocated for the secondary component carrier acquires an uplink response channel for feedback response information according to a preset rule.
  • the first obtaining unit 132 may include, but is not limited to, an uplink response channel that obtains feedback response information in the following two implementation manners:
  • the first acquisition The unit 132 acquires an uplink response channel allocated for the secondary component carrier PDCCH transmission or the SPS-PDSCH transmission in the subframe as an uplink response channel of the feedback response information;
  • the user equipment In the last subframe in which the PDCCH transmission or the SPS-PDSCH transmission is received, if the user equipment only receives the PDCCH transmission or the SPS-PDSCH transmission on the primary component carrier, or the user equipment receives the PDCCH transmission on the primary component carrier or The SPS-PDSCH transmits and detects that the secondary component carrier PDCCH is lost, and the first acquiring unit 132 acquires an uplink response channel allocated for the primary component carrier PDCCH transmission or the SPS-PDSCH transmission in the subframe as the uplink response channel of the feedback response information. .
  • the embodiment of the present invention further provides another apparatus for selecting a response channel, which may be used in a single carrier technology or in a carrier aggregation technology.
  • the selecting apparatus includes: a second receiving unit 141. Second acquiring unit 142.
  • the second receiving unit 141 is configured to receive a physical downlink control channel transmission or a semi-persistent scheduling physical downlink shared channel transmission in each subframe.
  • the second obtaining unit 142 is configured to obtain, before the received loss, the received
  • the corresponding uplink acknowledgement channel is allocated as the feedback in the last downlink subframe of the physical downlink control channel or the semi-persistent scheduling physical downlink shared channel transmission.
  • the physical downlink control channel received in the embodiment of the present invention includes a downlink allocation indication field, and the lower allocation indication field is generated in the order of the primary component carrier after the secondary component carrier in one subframe.
  • the downlink allocation indication field may be generated in descending order of the number of the secondary component carriers, or from the largest to the smallest; or the one subframe All the secondary component carriers generate the downlink allocation indication field in descending order of the center frequency of the secondary component carrier, or from high to low.
  • the embodiment After receiving the physical downlink control channel transmission or the semi-persistent scheduling physical downlink shared channel transmission in each subframe, the embodiment allocates an uplink response channel corresponding to each subframe, but receives the physical downlink control channel transmission.
  • the uplink acknowledgement channel used as the feedback response information in the uplink acknowledgement channel corresponding to the last subframe before the received loss is selected, so that the network side can pass
  • the adopted uplink acknowledgement channel determines that the data before the uplink acknowledgement channel corresponds to the physical downlink control channel transmission or the semi-persistent scheduling physical downlink shared channel transmission does not need to be retransmitted, but the data after the physical downlink control channel transmission loss is received. Retransmission is beneficial to improve downstream throughput.
  • the network side can accurately know which PDCCHs are lost and which PDCCHs are successfully received by the UE, so that the network side can select an appropriate HARQ retransmission scheme for the two cases respectively.
  • the apparatus for selecting a response channel can be used in a single carrier scenario or a carrier aggregation scenario.
  • the corresponding reception conditions in various scenarios are as follows:
  • the second receiving unit 141 receives a physical downlink control channel transmission or a semi-persistent scheduling physical downlink shared channel transmission in each downlink subframe of the accessed carrier.
  • the second receiving unit 141 receives the physical downlink control channel transmission or the semi-persistent scheduling physical downlink shared channel transmission on the secondary component carrier in each subframe, and receives the primary component carrier. Physical downlink control channel transmission or semi-persistent scheduling The downlink shared channel transmission.
  • the second obtaining unit 142 acquires the physical downlink control channel or the semi-persistent scheduling physical downlink before the received loss.
  • the uplink acknowledgement channel allocated to the primary component carrier in the last downlink subframe of the shared channel transmission is used as the uplink acknowledgement channel for feedback response information.
  • an uplink acknowledgement channel is allocated to the primary component carrier in each subframe and an uplink acknowledgement channel is allocated to all the secondary component carriers
  • the physical downlink control channel transmission or the semi-persistent scheduling physical downlink shared channel transmission is received
  • the physical downlink control channel transmission or the semi-persistent scheduling physical downlink shared channel transmission is received only on the secondary component carrier, and the second acquiring unit 142 obtains the physical downlink control channel transmission on the secondary component carrier.
  • an uplink acknowledgement channel is allocated to the primary component carrier and an uplink acknowledgement channel is allocated to all secondary component carriers in each downlink subframe, if physical downlink control channel transmission or semi-persistent scheduling physical downlink shared channel transmission is received In the last subframe, the physical downlink control channel transmission or the semi-persistent scheduling physical downlink shared channel transmission is received only on the primary component carrier, or the physical downlink control channel transmission or half is received on the primary component carrier and the secondary component carrier.
  • the second acquisition unit 142 obtains the uplink response channel allocated in the last subframe of the physical downlink control channel transmission or the semi-persistent scheduling physical downlink shared channel transmission on the primary component carrier. The uplink response channel that feeds back the response information.
  • the embodiments of the present invention are mainly used in a communication system, including but not limited to a GSM communication system, a CDMA communication system, a third generation mobile communication system, and a next generation mobile communication system (LTE, LTE-A, etc.), as long as a single carrier is used.
  • the feedback response message of the embodiment provided by the present invention may be adopted by the technology or the carrier aggregation technology.
  • the technical solution of the present invention which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a readable storage medium, such as a floppy disk of a computer.
  • a hard disk or optical disk or the like includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform the methods described in various embodiments of the present invention.

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

Abstract

La présente invention concerne un procédé et un dispositif pour transmettre un index d'attributions de liaison descendante (DAI ou Downlink Assignment Index), le procédé comprenant les étapes suivantes : le DAI est généré dans l'ordre selon lequel des sous-trames de liaison descendante sur des porteuses constitutives secondaires précèdent les sous-trames de liaison descendante sur une porteuse constitutive primaire au sein d'une sous-trame de liaison descendante, et le DAI est généré dans l'ordre chronologique des sous-trames de liaison descendante parmi différentes sous-trames de liaison descendante (201); le DAI généré est transmis sur le canal de contrôle de liaison descendante physique (PDCCH) (202). Avec le procédé et le dispositif pour transmettre un DAI proposés par la présente invention, un équipement d'abonné peut plus facilement détecter, à l'aide du champ DAI incorporé dans le PDCCH de la porteuse constitutive primaire, si certains PDCCH ont été perdus sur les porteuses constitutives secondaires dans la sous-trame. Par ailleurs, la présente invention propose également un procédé et un dispositif pour renvoyer les informations de réponse.
PCT/CN2011/074612 2010-07-06 2011-05-24 Procédé et dispositif pour transmettre un index d'attributions de liaison descendante, procédé et dispositif pour renvoyer les informations de réponse WO2011137822A1 (fr)

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CN2010102226362A CN102315916B (zh) 2010-07-06 2010-07-06 下行分配指示的发送方法及装置、应答信道的反馈方法及装置

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CN103516466B (zh) * 2012-06-21 2016-12-21 华为技术有限公司 一种控制信道资源映射方法、发射机、接收机及系统
WO2014172843A1 (fr) * 2013-04-23 2014-10-30 华为技术有限公司 Procédé pour envoyer des informations d'état de canal, équipement utilisateur, station de base, et système
WO2015027520A1 (fr) * 2013-09-02 2015-03-05 华为技术有限公司 Méthode, dispositif et système d'agrégation de porteuses
CN105991250B (zh) 2015-02-10 2020-08-07 华为技术有限公司 一种基站、用户终端及载波调度指示方法和装置
CN107733579B (zh) * 2016-08-12 2020-03-03 电信科学技术研究院 一种ack/nack反馈方法、装置及系统
CN111416691B (zh) * 2019-01-04 2023-04-07 大唐移动通信设备有限公司 一种信息传输方法、装置及设备
CN113595697B (zh) * 2020-04-30 2022-09-27 维沃移动通信有限公司 Dai计数方法、dai计数控制方法、终端及网络设备

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