WO2012013149A1 - 反馈信息的信道资源指示方法及设备 - Google Patents

反馈信息的信道资源指示方法及设备 Download PDF

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Publication number
WO2012013149A1
WO2012013149A1 PCT/CN2011/077704 CN2011077704W WO2012013149A1 WO 2012013149 A1 WO2012013149 A1 WO 2012013149A1 CN 2011077704 W CN2011077704 W CN 2011077704W WO 2012013149 A1 WO2012013149 A1 WO 2012013149A1
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Prior art keywords
feedback information
channel resources
dai
base station
feedback
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PCT/CN2011/077704
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English (en)
French (fr)
Inventor
高雪娟
林亚男
沈祖康
潘学明
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电信科学技术研究院
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Publication of WO2012013149A1 publication Critical patent/WO2012013149A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0055Physical resource allocation for ACK/NACK
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/0001Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0028Formatting
    • H04L1/0029Reduction of the amount of signalling, e.g. retention of useful signalling or differential signalling
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/12Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607Details of the supervisory signal
    • H04L1/1671Details of the supervisory signal the supervisory signal being transmitted together with control information
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/0001Arrangements for dividing the transmission path
    • H04L5/0003Two-dimensional division
    • H04L5/0005Time-frequency
    • H04L5/0007Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053Allocation of signaling, i.e. of overhead other than pilot signals
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/0091Signaling for the administration of the divided path
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/20Control channels or signalling for resource management
    • H04W72/23Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

Definitions

  • the present invention relates to the field of digital communications, and in particular, to a channel resource indication method and apparatus for feedback information. Background technique
  • LTE-A Long Term Evolution-Advanced
  • LTE-A Long Term Evolution-Advanced
  • 3GPP completed the technical requirements report of LTE-A and proposed the minimum requirements of LTE-A: downlink peak rate lGbps, uplink peak rate 500Mbps, uplink and downlink peak spectrum utilization respectively reached 15Mbps/Hz and 30Mbps/ Hz.
  • Figure 1 shows a single spectrum system. Some spectrum will be allocated to the existing system, and the single spectrum shown in Figure 1 will be aggregated to make a large bandwidth for long-term evolution multi-carrier system.
  • Figure 2 shows a spectrum aggregation system. As shown in FIG. 2, the uplink and downlink carriers in the system can be asymmetrically configured, that is, the user may occupy one carrier for downlink transmission, and M ⁇ 1 carriers perform uplink transmission.
  • the user When the data on each downlink carrier is independently compiled and coded, the user performs HARQ (Hybrid-ARQ, Hybrid Automatic Repeat Request) retransmission request feedback, that is, ACK/NACK information, for each packet on each carrier. Therefore, the user may simultaneously feed back multiple ACK/NACK information to the base station in one uplink subframe.
  • HARQ Hybrid-ARQ, Hybrid Automatic Repeat Request
  • the LTE-A system is currently determined to support up to 5 carriers for aggregation.
  • a plurality of downlink carriers and downlink subframes that need to perform ACK/NACK feedback in the same uplink subframe are hereinafter referred to as "feedback windows".
  • the size of the feedback window is N, where N is the number of downlink aggregated carriers or the number of downlink active carriers.
  • the size of the feedback window is ⁇ , where ⁇ is the number of downlink aggregated carriers or the number of downlink active carriers, and M corresponds to the number of downlink subframes that are fed back in the same uplink subframe, for different uplink and downlink configurations and uplink subframes.
  • M corresponds to the number of downlink subframes that are fed back in the same uplink subframe, for different uplink and downlink configurations and uplink subframes.
  • the value of M is different, that is, the number of each column K in Table 1.
  • the ACK/NACK Multiplexing multiplexing scheme in the LTE-A system has been determined as follows: For an LTE-A UE supporting up to 4 bits of ACK/NACK information in the same uplink subframe, the PUCCH Format lb with channel selection transmission scheme is adopted. The scheme distinguishes different ACK/NACK states by performing selective transmission of multiple channel resources by the UE, and requires 2 to 4 uplink control channel resources for 2 ⁇ 4 bits of ACK/NACK feedback; for supporting in the same uplink subframe
  • the LTE-A UE with more ACK/NACK feedback information than 4 bits uses a new PUCCH structure transmission scheme based on DFT-S-OFDM (subsequently named PUCCH format 3 scheme), which requires an uplink control channel resource.
  • the UE Before the UE uses the PUCCH for ACK/NACK feedback, the UE first needs to obtain one or more ACK/NACK transmission available uplink control channel resources, referred to as ACK/NACK channel resources, represented by one or more channel resource numbers.
  • ACK/NACK channel resources In the LTE system, the UE has the largest reservation of the uplink control channel resources, that is, each PDCCH (Physical Downlink Control Channel) carrying the DL grant corresponds to an available uplink control channel resource (transportable PUCCH) Format 1/la/lb ).
  • each PDCCH Physical Downlink Control Channel
  • transportable PUCCH Transportable PUCCH
  • its ACK/NACK channel resource number is implicitly obtained according to the first CCE (Control Channel Element) number of the PDCCH scheduling the data packet.
  • the base station may know in advance the specific time position of each information transmission according to the period of the feedback, so the ACK/NACK channel resource number is activated by the TPC (Transmit Power Control) of the PDCCH that activates the semi-persistent scheduling.
  • the control field indicates that the channel resource is a channel resource in a semi-static uplink control channel resource pool that the base station pre-allocates to the UE through RRC signaling.
  • each uplink carrier In the LTE-A CA (Carrier Aggregation) system, in order to ensure compatibility with the R8 system, each uplink carrier always reserves its corresponding downlink carrier according to the implicit resource notification mode of LTE Rel-8. Uplink control channel resources. However, when the UE receives data on multiple downlink carriers, if the implicit control of the uplink control channel resources is still performed according to the manner in the LTE Rel-8 system, the system needs to pre-predict each downlink carrier in each uplink carrier. Retaining the corresponding uplink control channel resources will cause serious resource waste in each uplink carrier, thus affecting the transmission efficiency of the system.
  • LTE-A CA Carrier Aggregation
  • the C A UE may be configured with a semi-static uplink control channel resource for ACK/NACK transmission, and multiple C A UEs may share the semi-static resources.
  • the LTE-A UE can only transmit the PUCCH on one configured uplink primary carrier, when there is no PDCCH for dynamically scheduling the downlink data packet in the downlink carrier corresponding to the uplink primary carrier, the UE cannot obtain the implicit resource, and can only use the half.
  • the statically configured uplink control channel resource transmits ACK/NACK. Therefore, the implicit Rel-8 implicit resource indication method is no longer applicable to the ACK/NACK feedback of the LTE-A CA UE.
  • Some mechanism is required to notify the UE of the specific ACK/NACK resources, such as the PDCCH carrying the DL grant.
  • the UE is dynamically notified to use implicit ACK/NACK implicit resources or a specific one or a set of semi-statically configured ACK/NACK channel resources.
  • the base station sends a 2-bit DAI (Downlink Assignment Index) in the DL grant, where the DAI is a counter, indicating that the current PDCCH is the PDCCH in the feedback window (the PDCCH includes the PDCCH of the dynamic scheduling packet) And releasing the semi-persistently scheduled PDCCH) to help the UE determine the scheduling of the data packets within the feedback window.
  • DAI Downlink Assignment Index
  • the UE when the UE performs ACK/NACK multiplexing transmission, it always feeds back ACK/NACK feedback information corresponding to the feedback window size, each ACK/NACK.
  • the specific location of the feedback information may be determined according to the aggregated or activated downlink carrier location and the scheduled downlink subframe position. For downlink carriers and subframe positions without downlink packets, the UE always provides feedback.
  • the object of the present invention is to solve at least one of the above technical drawbacks, and in particular, the 2-bit DAI in the DL grant is not fully utilized in the LTE-A TDD system, thereby performing ACK/NACK multiplexing transmission by utilizing 2-bit DAI information. Re-used to indicate ACK/NACK channel resources.
  • an embodiment of the present invention provides a channel resource indication method for feedback information, which includes the following steps:
  • the base station sends a downlink allocation index DAI bit to the terminal user UE in the downlink scheduling signaling DL grant, where the DAI bit can be used at least to indicate channel resources of the feedback information;
  • the base station sends a DL grant to the UE through a physical downlink control channel PDCCH.
  • Another embodiment of the present invention provides a channel resource indication method for feedback information, including the following steps:
  • the terminal user UE receives the downlink scheduling signaling DL grant sent by the base station through the physical downlink control channel PDCCH;
  • the DL grant includes a downlink allocation index DAI bit, and the DAI bit can be used at least for channel resources indicating feedback information.
  • Another aspect of an embodiment of the present invention provides a base station, including a transmitting module and an indication module.
  • the sending module is configured to send, by using a physical downlink control channel PDCCH, a downlink scheduling signaling DL grant to the UE, where the DL grant includes a downlink allocation index DAI bit;
  • the indication module is configured to at least indicate, by using the DAI bit, a channel resource of the feedback information to the UE.
  • Another embodiment of the present invention provides a user equipment UE, including a receiving module and an acquiring module.
  • the receiving module is configured to receive, by using a physical downlink control channel PDCCH, a base station to send Downlink scheduling signaling DL grant;
  • the acquiring module is configured to acquire indication information according to a downlink allocation index DAI bit included in the DL grant, where the DAI bit is at least used to indicate channel resources of the feedback information.
  • the above solution proposed by the present invention is a method for indicating channel resources of LTE-A UE ACK/NACK multiplex transmission by reusing the 2-bit DAI in the LTE grant of the LTE TDD system.
  • the base station can implement the indication of the ACK/NACK channel resource used by the LTE-A UE by using the DAI information field in the DL grant according to the specific ACK/NACK feedback mode and the transmission scheme without adding extra bits in the PDCCH.
  • the method is easy to implement, does not increase the downlink control signaling overhead, and is applicable to the ACK/NACK multiplexing transmission mode of the LTE-A TDD system.
  • the above solution proposed by the present invention has little change to the existing system, does not affect the compatibility of the system, and is simple and efficient to implement.
  • Figure 1 is a schematic diagram of a single spectrum system
  • FIG. 2 is a schematic diagram of a spectrum aggregation system
  • FIG. 3 is a flow chart of a channel resource indication method for base station side feedback information according to an embodiment of the present invention
  • FIG. 4 is a flow chart of a method for acquiring channel resources of UE side feedback information according to an embodiment of the present invention
  • FIG. 5 is a schematic structural diagram of a base station according to an embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of a UE according to an embodiment of the present invention.
  • Figure 7 shows DAI for resource indication example 1
  • Figure 8 is a DAI for resource indication example 2;
  • Figure 9 shows DAI for resource indication example 3.
  • FIG. 10 is a DAI for resource indication example 4. Detailed ways
  • the DAI in the DL grant may be used to indicate the ACK/NACK channel resource
  • the DAI in the DL grant is used according to the usage method in the LTE TDD system, that is, the DAI is a counter, and indicates the number of PDCCHs in the feedback window that need feedback information to help the UE determine the scheduling of the data packets in the feedback window.
  • the ACK/NACK channel resource may be obtained according to the implicit resource indication manner of the Rel-8 TDD; for the semi-persistently scheduled downlink data packet, the ACK/NACK channel resource is the PDCCH for activating the semi-persistent scheduling data packet.
  • the uplink control channel resources indicated by the middle TPC domain are described in the background section.
  • the present invention provides a channel resource indication method for feedback information, including the following steps:
  • the base station sends a downlink allocation index DAI bit to a terminal user UE in a downlink scheduling signaling DL grant, where the DAI bit is at least The channel resource that can be used to indicate the feedback information;
  • the base station sends a DL grant to the UE through the physical downlink control channel PDCCH.
  • FIG. 3 the flow of the channel resource indication method of the base station side feedback information according to the embodiment of the present invention is used.
  • the diagram includes the following steps:
  • the base station sends a DAI bit to the UE in the DL grant, where the DAI bit is at least used to indicate channel resources of the feedback information.
  • the DAI bit may also be used to indicate the number of PDCCHs that need feedback information in a downlink subframe set corresponding to information feedback of the same uplink subframe.
  • the DAI bit has different indication meanings, for example: if the UE is configured with multiple downlink carriers, the DAI bit is used to indicate channel resources of the feedback information;
  • the DAI bit is used to indicate that one of the corresponding uplink subframes is for information feedback.
  • the base station configures the UE with at least one set of feedback information channel resources by using high layer signaling, such as RRC signaling, and each group of channel resources of the at least one set of feedback information channel resources includes At least one feedback information channel resource.
  • high layer signaling such as RRC signaling
  • the base station indicates, by the DAI bit, a set of channel resources in the at least one set of feedback information channel resources to the UE, and is used to transmit feedback information of the UE.
  • the base station indicates, by using the DAI bit, the feedback information channel resource other than the at least one set of feedback information channel resources configured by the high layer;
  • the feedback information channel resources other than the at least one set of feedback information channel resources configured by the upper layer are obtained by the UE through the lowest sequence number of the control channel element CCE of the PDCCH, or obtained by activating the TPC domain indication information of the PDCCH of the semi-sustained scheduling.
  • the base station sends the DL grant information to the UE by using the PDCCH.
  • the base station sends a channel resource indication to the UE through the DAI.
  • a flowchart of a channel resource acquisition method for terminal side feedback information includes the following steps:
  • the terminal user UE receives the DL grant sent by the base station by using the PDCCH.
  • S203 The UE acquires indication information according to a downlink allocation index DAI bit included in the DL grant, where the DAI bit is at least used to indicate channel resources of the feedback information.
  • the DAI bit can also be used to indicate the number of PDCCHs that need feedback information in a downlink subframe set corresponding to information feedback of the same uplink subframe.
  • the DAI bits acquired by the UE have different indication meanings, for example:
  • the DAI bit is used to indicate channel resources of the feedback information
  • the DAI bit is used to indicate the number of PDCCHs that need feedback information in a downlink subframe set corresponding to information feedback of the same uplink subframe.
  • the base station configures the UE with at least one set of feedback information channel resources by using high layer signaling, such as RRC signaling, and each group of channel resources of the at least one set of feedback information channel resources includes At least one feedback information channel resource. Further, the UE determines, by using the DAI bit sent by the base station, a set of channel resources in the at least one set of feedback information channel resources, and is used to transmit feedback information of the UE.
  • high layer signaling such as RRC signaling
  • the UE determines, by the DAI bit sent by the base station, a feedback information channel resource other than the at least one set of feedback information channel resources configured by the upper layer;
  • the feedback information channel resources other than the at least one set of feedback information channel resources configured by the upper layer are obtained by the UE through the lowest sequence number of the control channel element CCE of the PDCCH, or obtained by activating the TPC domain indication information of the PDCCH of the semi-sustained scheduling.
  • FIG. 5 it is a schematic structural diagram of a base station 100 according to an embodiment of the present invention, including a sending module 110 and an indicating module 120.
  • the sending module 110 is configured to send a downlink scheduling signaling DL grant to the UE by using a physical downlink control channel PDCCH, where the downlink allocation index DAI bit is included in the DL grant.
  • the indication module 120 is configured to at least indicate a channel resource of the feedback information to the UE through the DAI bit. Specifically, the indication module 120 is further configured to: indicate, by using the DAI bit, the number of PDCCHs that need feedback information in a downlink subframe set corresponding to information feedback of the same uplink subframe.
  • the indication module 120 is configured to indicate channel resources of the feedback information by using DAI bits;
  • the number of PDCCHs that need feedback information in a downlink subframe set corresponding to the same uplink subframe for information feedback is indicated by the DAI bit.
  • the base station 100 further includes a configuration module 130.
  • the configuration module 130 configures, by the high layer signaling, at least one set of feedback information channel resources to the UE, and each set of channel resources of the at least one set of feedback information channel resources includes at least one feedback information channel resource.
  • the indication module 120 indicates to the UE, by using a DAI bit, a set of channel resources in at least one set of feedback information channel resources, for transmitting feedback information of the UE.
  • the indication module 120 indicates, by using a DAI bit, a feedback information channel resource other than the at least one set of feedback information channel resources configured by the high layer;
  • FIG. 6 is a schematic structural diagram of a UE 200 according to an embodiment of the present invention, including a receiving module 210 and an obtaining module 220.
  • the receiving module 210 is configured to receive, by using the PDCCH, a DL grant sent by the base station.
  • the obtaining module 220 is configured to obtain indication information according to a downlink allocation index DAI bit included in the DL grant, where the DAI bit can be used at least to indicate channel resources of the feedback information.
  • the DAI bit acquired by the obtaining module 220 may be used to indicate the number of PDCCHs that need feedback information in a downlink subframe set corresponding to information feedback of the same uplink subframe.
  • the obtaining module 220 determines that the DAI bit is used to indicate channel resources of the feedback information
  • the obtaining module 220 determines that the DAI bit is used to indicate the number of PDCCHs that need feedback information in a downlink subframe set corresponding to information feedback of the same uplink subframe.
  • the receiving module 210 receives the high layer signaling of the base station, and the high layer signaling configures the UE with at least one set of feedback information channel resources, where each group of channel resources of the at least one set of feedback information channel resources includes at least one feedback information channel resource. .
  • the acquiring module 220 determines, by using DAI bits sent by the base station, a set of channel resources in at least one set of feedback information channel resources, and is used to transmit feedback information of the UE.
  • the obtaining module 220 determines, by using DAI bits sent by the base station, feedback information channel resources other than the at least one set of feedback information channel resources configured by the upper layer;
  • the feedback information channel resources other than the at least one set of feedback information channel resources configured by the upper layer are obtained by the UE through the lowest sequence number of the control channel element CCE of the PDCCH, or obtained by activating the TPC domain indication information of the PDCCH of the semi-sustained scheduling.
  • the base station configures, by using the high layer signaling, the channel resource of the feedback information to the UE.
  • the UE when the UE is configured to use the PUCCH Format lb with channel selection structure to transmit ACK/NACK feedback information, the UE is configured with a feedback signal by using high layer signaling, and the channel resources of the ⁇ include any one of the following methods:
  • the P-group semi-static ACK/NACK channel resources are configured by the high-layer signaling, and each group includes K uplink CHC format 1/la/lb format uplink control channel resources, preferably, when DAI t is 2 t ⁇ , 1 ⁇ P ⁇ 4, 2 ⁇ K ⁇ 4;
  • the UE is configured with Q group semi-static ACK/NACK channel resources, and each group includes K PUCCH format 1/la/lb format uplink control channel resources, preferably, when DAI ⁇ # is 2 ⁇ # ⁇ , 1 ⁇ Q ⁇ 3, 2 ⁇ K ⁇ 4.
  • the semi-static channel resource manner for configuring feedback information to the UE through high layer signaling is:
  • the R semi-static ACK/NACK channel resources are configured to the UE by high layer signaling.
  • the DAI bit is 2 bits, 1 ⁇ R ⁇ 4.
  • the base station indicates the channel resource by using the DAI in the DL grant.
  • step S320 the base station selects a corresponding channel resource from the channel resources configured in step S310, and indicates the corresponding channel resource by using a downlink allocation index DAI in the downlink scheduling signaling DL grant.
  • the state of the DAI indicates different indication meanings.
  • the state meaning of the DAI may be any of the following:
  • each group includes K PUCCH format 1/la/lb format uplink control channel resources, 1 ⁇ P ⁇ 4, 2 ⁇ K ⁇ 4, then:
  • each group includes K PUCCH format 1/la/lb format uplink control channel resources, 1 ⁇ Q ⁇ 3, 2 ⁇ K ⁇ 4, then:
  • Reusing one of the four states of 2-bit DAI information in the LTE grant of the LTE TDD system indicates that the UE uses implicit resources, and the remaining three states indicate one of the Q-group semi-static ACK/NACK channel resources of the UE. Resources.
  • the semi-static channel resource mode configured by the high-layer signaling to the UE to provide feedback information is The UE configures R semi-static ACK/NACK channel resources, 1 ⁇ R ⁇ 4, then the state meaning of the DAI can be:
  • One of the R semi-static ACK/NACK channel resources is indicated by reusing 2-bit DAI information in the LTE TDD system DL grant.
  • the base station sends the DL grant information to the UE by using the PDCCH.
  • step S330 the base station sends DL grant information to the UE through the PDCCH.
  • another method for obtaining a channel resource for terminal side feedback information includes the following steps:
  • the user equipment UE receives, by using the high layer signaling, a channel resource used by the configured feedback information sent by the base station to the UE.
  • the semi-static channel resource that the UE receives the feedback information sent by the base station to the UE by using the high layer signaling includes the following: Either way: Configure P-group semi-static ACK/NACK channel resources by high-level signaling, each group contains K PUCCH format 1/la/lb format uplink control channel resources, preferably, when the DAI bit is 2 bits When, 1 ⁇ P ⁇ 4, 2 ⁇ K ⁇ 4;
  • each group contains K PUCCH format 1/la/lb format uplink control channel resources, preferably, when DAI bits When it is 2 bits, 1 ⁇ Q ⁇ 3, 2 ⁇ 4.
  • the semi-static channel resource manner in which the UE receives the feedback information sent by the base station to the UE by using the high layer signaling is:
  • R semi-static ACK/NACK channel resources are configured by higher layer signaling.
  • the DAI bit is 2 bits, 1 ⁇ R ⁇ 4.
  • S420 The UE detects a 2-bit DAI in the downlink scheduling signaling DL grant according to the feedback window, and determines a channel resource used by the feedback information.
  • the DAI detected by the UE has different meanings, for example:
  • the meaning of the DAI may be any of the following:
  • each group includes K uplink CHCCH format 1/la/lb format uplink control channel resources, 1 ⁇ P ⁇ 4, 2 ⁇ K ⁇ 4, then:
  • the UE detects 2-bit DAI information in the downlink scheduling signaling DL grant according to the feedback window, and determines a group of the P-group semi-static ACK/NACK channel resources as channel resources for feedback information transmission;
  • the UE detects the 2-bit DAI information in the downlink scheduling signaling DL grant according to the feedback window, and determines the K half The order in which static ACK/NACK channel resources are used;
  • each group includes K uplink CHC format 1/la/lb format uplink control channel resources, 1 ⁇ Q ⁇ 3, 2 ⁇ K ⁇ 4, then:
  • the UE detects 2-bit DAI information in the downlink scheduling signaling DL grant according to the feedback window, and determines a channel resource that uses one of the implicit resources or the Q group semi-static ACK/NACK channel resources to transmit as feedback information.
  • the UE When the UE is configured to use the DFT-S-OFDM-based PUCCH new structure to transmit ACK/NACK feedback information, the UE receives the semi-static channel resource information of the feedback information sent by the base station to the UE by using the high layer signaling.
  • High-level signaling configures R semi-static ACK/NACK channel resources, 1 ⁇ R ⁇ 4, then the meaning of DAI can be:
  • the UE detects 2-bit DAI information in the downlink scheduling signaling DL grant according to the feedback window, and determines one of the R semi-static ACK/NACK channel resources as a channel resource for feedback information transmission.
  • the base station device includes a configuration module 510, an indication module 520, and a transmission module 530.
  • the configuration module 510 is configured to configure the semi-static channel resource of the feedback information to the UE by using the high-layer signaling; the indication module 520 is configured to reuse the 2-bit downlink allocation index DAI in the DL grant of the LTE TDD system to indicate that the UE uses the implicit A resource or one or a group of resources in a channel resource configured using higher layer signaling.
  • the configuration module 510 configures the semi-static channel resources of the feedback information to the UE through the high layer signaling, including any one of the following methods:
  • the configuration module 510 configures, by the high layer signaling, the P group semi-static ACK/NACK channel resources, where each group includes K PUCCH format 1/la/lb format uplink control channel resources, and the LAI t For 2 t ⁇ , 1 ⁇ P ⁇ 4, 2 ⁇ K ⁇ 4;
  • the configuration module 510 configures the UE with a semi-static ACK/NACK channel resource by using high-level signaling, preferably, when the DAI bit is 2 bits, 2 ⁇ K ⁇ 4;
  • the configuration module 510 configures the Q group semi-static ACK/NACK channel resources by using the high layer signaling, and each group includes K PUCCH format 1/la/lb format uplink control channel resources, preferably, when the DAI bit is 2 bits. When, 1 ⁇ Q ⁇ 3, 2 ⁇ K ⁇ 4.
  • the configuration module 510 configures the semi-static channel resource of the feedback information to the UE through the high layer signaling:
  • the configuration module 510 configures R semi-static ACK/NACK channel resources to the UE through high layer signaling. Preferably, when the D AI bit is 2 bits, 1 ⁇ R ⁇ 4.
  • the manner in which the indication module 520 reuses the DAI to indicate the channel resource used by the UE may be any one of the following:
  • the configuration module 510 configures the P group semi-static ACK/NACK channel resources by using the high layer signaling, each group includes K PUCCH format 1/la/lb format uplink control channel resources, 1 ⁇ P ⁇ 4, 2 ⁇ K ⁇ 4, then:
  • the indication module 520 indicates a group of resources in the P group semi-static ACK/NACK channel resource by reusing the 2-bit DAI information in the LTE TDD system DL grant;
  • the configuration module 510 configures the K semi-static ACK/NACK channel resources by the high layer signaling, 2 ⁇ K ⁇ 4, then:
  • the indication module 520 indicates the order of use of the K semi-static ACK/NACK channel resources by reusing the 2-bit DAI information in the LTE TDD system DL grant;
  • each group includes K PUCCH format 1/la/lb format uplink control channel resources, 1 ⁇ Q ⁇ 3, 2 ⁇ K ⁇ 4, then:
  • the indication module 520 indicates that the UE uses implicit resources by reusing one of the four states of 2-bit DAI information in the LTE grant of the LTE TDD system, and the remaining three states indicate a group of resources in the Q group semi-static ACK/NACK channel resources of the UE. .
  • the configuration module 510 configures the R semi-static ACK/NACK channel resources to the UE by using the high layer signaling, where 1 ⁇ R ⁇ 4,
  • the manner in which the indication module 520 reuses the DAI to indicate the channel resource used by the UE may be:
  • the indication module 520 indicates one of the R semi-static ACK/NACK channel resources by reusing the 2-bit DAI information in the LTE TDD system DL grant.
  • the sending module 530 is configured to send DL grant information to the UE by using the PDCCH.
  • the UE includes a receiving module 610, an obtaining module 620, and a sending module 630.
  • the receiving module 610 is configured to receive the semi-static channel resource of the configured feedback information sent by the base station to the UE by using the high-layer signaling
  • the acquiring module 620 is configured to detect the 2-bit downlink allocation index DAI in the downlink scheduling signaling DL grant according to the feedback window. , Get the channel resources used by the feedback information.
  • the receiving module 610 receives the semi-static channel resources of the configured feedback information sent by the base station to the UE through the high layer signaling, and includes any one of the following methods:
  • each group contains K PUCCH format 1/la/lb format uplink control channel resources, preferably, when the DAI bit is 2 bits, 1 ⁇ P ⁇ 4, 2 ⁇ K ⁇ 4 ;
  • the Q group semi-static ACK/NACK channel resources are configured by the high layer signaling, and each group includes K PUCCH format 1/la/lb format uplink control channel resources, preferably, when the DAI bit is 2 bits, 1 ⁇ Q ⁇ 3, 2 ⁇ K ⁇ 4.
  • the receiving module 610 receives the configured semi-static channel resource information of the configured feedback information sent by the base station to the UE through the high layer signaling:
  • R semi-static ACK/NACK channel resources are configured by higher layer signaling.
  • the DAI bit is 2 bits, 1 ⁇ R ⁇ 4.
  • the obtaining module 620 detects the 2-bit downlink allocation index DAI in the downlink scheduling signaling DL grant according to the feedback window, and acquires channel resources used for the feedback information.
  • the way to do it includes any of the following:
  • each group includes K uplink CHCCH format 1/la/lb format uplink control channel resources, 1 ⁇ P ⁇ 4, 2 ⁇ K ⁇ 4, then:
  • the obtaining module 620 detects the 2-bit DAI information in the downlink scheduling signaling DL grant according to the feedback window, and determines a group of the P-group semi-static ACK/NACK channel resources as the channel resource for the feedback information transmission;
  • the obtaining module 620 detects 2 bits in the downlink scheduling signaling DL grant according to the feedback window.
  • DAI information determining the order of use of the K semi-static ACK/NACK channel resources
  • each group includes K uplink CHC format 1/la/lb format uplink control channel resources, 1 ⁇ Q ⁇ 3, 2 ⁇ K ⁇ 4, then:
  • the obtaining module 620 detects 2-bit DAI information in the downlink scheduling signaling DL grant according to the feedback window, and determines a channel resource that uses one of the implicit resource or the Q group semi-static ACK/NACK channel resource as the feedback information to be transmitted;
  • R semi-static ACK/NACK channel resources are configured through high layer signaling, 1 ⁇ R ⁇ 4, then the obtaining module 620 according to the feedback
  • the window detects the 2-bit downlink allocation index DAI in the downlink scheduling signaling DL grant, and determines the channel resource used for the feedback information: the obtaining module 620 detects the 2-bit DAI information in the downlink scheduling signaling DL grant according to the feedback window, and determines One of the R semi-static ACK/NACK channel resources is used as a channel resource for feedback information transmission.
  • the sending module 630 is configured to feed back ACK/NACK information by using channel resources of the feedback information.
  • the above solution proposed by the present invention is a method for indicating channel resources of LTE-A UE ACK/NACK multiplex transmission by reusing the 2-bit DAI in the LTE grant of the LTE TDD system.
  • the base station can implement the indication of the ACK/NACK channel resource used by the LTE-A UE by using the DAI information field in the DL grant according to the specific ACK/NACK feedback mode and the transmission scheme without adding extra bits in the PDCCH.
  • the method is easy to implement, does not increase the downlink control signaling overhead, and is applicable to the ACK/NACK multiplexing transmission mode of the LTE-A TDD system.
  • the above solution proposed by the present invention has little change to the existing system, does not affect the compatibility of the system, and is simple and efficient to implement.
  • the foregoing method or device provided by the present invention discloses multiple ways of indicating channel resources by using DAI.
  • the foregoing solution may be divided into multiple modes.
  • the method and device of the present invention are further combined with specific environments. set forth. For the sake of simplicity, the devices submitted later are not discussed in the sub-module, and the overall device characteristics will be described externally.
  • the specific functional modules are distinguished from the previous description.
  • the above method or device can be summarized and can usually be indicated in three ways.
  • Manner 1 The different states of the DAI information in the DL grant are used to indicate that the high layer signaling is pre-configured to a set of resources in the at least one set of semi-static resources of the UE.
  • DL grant with LTE TDD system In the case of the 2-bit DAI in the DL grant, the four states "00", “01”, “10", and "11" of the 2-bit DAI information in the DL grant are used to indicate that the RRC signaling is pre-configured to the P group of the UE.
  • the base station first configures P group semi-static ACK/NACK channel resources for each CA UE through RRC signaling, and each group includes K uplink control channel resources in the form of PUCCH format 1/la/lb format. Where 2 ⁇ K ⁇ 4.
  • the base station selects a group of channel resources numbered a from the group of semi-static ACK/NACK channel resources as the ACK/NACK channel resource group configured for the UE, 0 ⁇ a ⁇ P1, and all downlink packets included in the feedback window.
  • the 2-bit DAI in the DL grant is set to a state corresponding to the ACK/NACK channel resource group number a, and the UE is dynamically notified by the PDCCH carrying the DL grant.
  • the UE determines the semi-static ACK/NACK channel resource group used in the uplink subframe according to the 2-bit DAI information in any one of the detected DL grants in the feedback window, and uses the K ACK/NACK channel resources in the group to feed back ACK. /NACK information.
  • the corresponding relationship of resources is the same at the base station end and the UE side.
  • Predefined rules may correspond to the resource number i in the semi-static ACK/NACK channel resource group a in the order-corresponding, where 0 ⁇ 7 ' ⁇ -1.
  • the base station may configure the same P group semi-static ACK/NACK resource for multiple users, and limit the maximum number of P users in the same feedback window by scheduling, and each user corresponds to a different set of semi-static ACK/NACK resources. In this way, the utilization of resources is improved.
  • the different states of the DAI information in the DL grant are used to indicate the order of use of the at least one semi-static resource pre-configured by the high layer signaling to the UE.
  • the four states "00", “01”, “10”, and "11" of the 2-bit DAI information in the DL grant are used to indicate that the RRC signaling is pre-configured to K semi-static ACK/NACK channel resources of the UE, where 2 ⁇ K ⁇ 4;
  • the UE Considering that if the DL grant of the downlink data packet in the feedback window is lost, the UE cannot obtain the semi-static ACK/NACK channel resource corresponding to the DL grant, and therefore can only use the ACK/NACK mapping table considering the packet loss problem;
  • the DAI indicates four states "00", “01”, “10”, “11” and K semi-static ACK/NACK channel resource numbers [0, 1, ..., ⁇ -l]
  • the correspondence relationship uses the same predefined rules at the base station end and the UE side. For the simpler, for example: It can be matched in numerical order, ⁇ Table 2.
  • the base station first configures each semi-static ACK/NACK channel resource for each CA UE through RRC signaling according to the configuration and scheduling of the CA UE.
  • the base station respectively allocates K semi-static ACK/NACK channel resources to one downlink data packet in the feedback window, and sets a 2-bit DAI in the DL grant of each downlink data packet to its corresponding ACK/NACK channel resource number b phase.
  • the UE determines the order of the K semi-static ACK/NACK channel resources used in the uplink subframe according to the 2-bit DAI information in the DL grant detected in the feedback window and the scheduling order or carrier number order of each DL grant, that is, CCH , Q ⁇ ⁇ ' ⁇ _ 1 and the correspondence between the K semi-static ACK/NACK channel resources, and the ACK/NACK information is fed back using the K ACK/NACK channel resources in the order.
  • the channel resource " ⁇ '' Q ⁇ ⁇ _1 the same pre-defined rule is used at the base station end and the UE end in the correspondence between the scheduling packet sequence and the downlink carrier number sequence in which the data packet is located.
  • Simpler for example: The mapping can be performed according to the first carrier number from small to large, and the subsequent subframe scheduling order.
  • Manner 3 One of the different states of the DAI information in the DL grant is used to indicate that the UE uses the implicit resource, and the remaining state is used to indicate that the high layer signaling is pre-configured to a set of resources in the at least one set of semi-static resources of the UE.
  • the 2-bit DAI in the DL grant of the LTE TDD system Take the 2-bit DAI in the DL grant of the LTE TDD system as an example.
  • One of the four states "00", "01”, “10", “11” of the 2-bit DAI information in the DL grant is used to indicate that the UE uses implicit resources, and the remaining three states are used to indicate RRC signaling.
  • the Q group semi-static ACK/NACK channel resource pre-configured to the UE; wherein, 1 ⁇ Q ⁇ 3; wherein the implicit resource includes the reserved resource described in the background introduction and the semi-static channel resource corresponding to the semi-persistent scheduling data packet .
  • the base station first configures a group of semi-static ACK/NACK channel resources for each CA UE by using RRC signaling according to the configuration and scheduling of the CA UE, and each group includes K PUCCH format 1/la/lb format uplink control channel resources. , where 2 ⁇ K ⁇ 4; if the DL grant of the downlink data packet in the feedback window is lost, the UE cannot obtain the implicit ACK/NACK channel resource corresponding to the DL grant, and therefore can only use the ACK/NACK considering the packet loss problem. Map the table.
  • the uplink control channel resource of the downlink carrier exists due to the uplink primary carrier.
  • Reserved, Rel-8 ACK/NACK implicit resources can be used.
  • the base station selects the DAI "00" state to indicate that the implicit resource is used as an example: the base station sets the 2-bit DAI in the PDCCH carrying the DL grant on the downlink carrier to "00", indicating that the Rel-8 ACK/NACK implicit resource is used. Indicates the mode, and dynamically notifies the UE by the PDCCH carrying the DL grant.
  • the UE implicitly determines corresponding ACK/NACK channel resources on the uplink primary carrier according to the 2-bit DAI information in the DL grant detected in the feedback window and the first CCE number of each PDCCH, and uses these channel resources to feed back ACK/ NACK information.
  • the PDCCH carrying the downlink data packet DL grant is transmitted on other downlink carriers (DL SCC ) in the feedback window, there is no uplink control channel resource reservation of other downlink carriers on the uplink primary carrier, and a semi-static ACK/NACK is required.
  • Channel resources The base station selects a group of channel resources numbered c in the Q group semi-static ACK/NACK channel resource as the ACK/NACK channel resource group configured for the UE, 0 ⁇ c ⁇ Ql, and the downlink data packet included in the feedback window
  • the 2-bit DAI in the DL grant is set to a state corresponding to the ACK/NACK channel resource group number c, and the UE is dynamically notified by the PDCCH carrying the DL grant.
  • the UE determines the semi-static ACK/NACK channel resource group used in the uplink subframe according to the 2-bit DAI information in any one of the detected DL grants in the feedback window, and uses the K ACK/NACK channel resources in the group to feed back the ACK. /NACK information.
  • the corresponding relationship of resources is the same at the base station end and the UE side.
  • Predefined rules may correspond to the order-corresponding, ie ⁇ , to the resource number i in the semi-static ACK/NACK channel resource group c, where 0 ⁇ z' ⁇ -1.
  • the base station may configure the same Q group semi-static ACK/NACK resource for multiple users, and limit up to only Q users in the same feedback window by scheduling, and each user corresponds to a different set of semi-static ACK/NACK resources. In this way, the utilization of resources is improved.
  • the above methods or devices can be summarized and can usually be indicated in the following manner:
  • the different states of the DAI information in the DL grant are used to indicate that the high layer signaling is pre-configured to one of the at least one semi-static resources of the UE.
  • the four states "00", “01", “10”, and "1" of the 2-bit DAI information in the DL grant are used to indicate that the RRC signaling is pre-configured to R semi-static ACK/NACK channel resources of the UE; wherein, 1 ⁇ R ⁇ 4;
  • the base station first configures R semi-static ACK/NACK channel resources for each CA UE by using RRC signaling according to the configuration and scheduling of the CA UE.
  • the base station selects the number of d channel resources as the ACK/NACK channel resources allocated to the UE among the R semi-static ACK/NACK channel resources, 0 ⁇ d ⁇ R1, and all the DL grants of the downlink data packets included in the feedback window are included.
  • the 2-bit DAI is set to a state corresponding to the ACK/NACK channel resource number d, and the UE is dynamically notified by the PDCCH carrying the DL grant.
  • the UE determines the semi-static ACK/NACK channel resource used in the uplink subframe according to the 2-bit DAI information in any one of the detected DL grants in the feedback window, and uses the resource to feed back the ACK/NACK information.
  • the base station may configure the same R semi-static ACK/NACK resources for multiple users, and limit the maximum number of P users in the same feedback window by scheduling, and each user corresponds to a different semi-static ACK/NACK resource. This improves the utilization of resources.
  • DAI is used for resource indication instance 1 :
  • the UE is configured with two carriers, and operates in the TDD uplink and downlink configuration 1 and uses the PUCCH Format lb with channel selection transmission mode.
  • the base station first allocates four sets of semi-static ACK/NACK channel resources to the UE through RRC signaling, and each group includes four uplink control channel resources in the format of PUCCH format 1/la/lb, and the correspondence between the D AI state and the channel resource group number. The relationship is as shown in Table 3.
  • the specific ACK/NACK channel resource indication procedure is as follows: The base station selects the semi-static resource group of number 3 as the channel resource group configured for the UE, and all the DL grants of the downlink data packets included in the feedback window are included.
  • the 2-bit DAI is set to "1", and the UE is dynamically notified by the PDCCH carrying the DL grant, as shown in FIG. 7; the UE detects the DL grant according to any one of the feedback windows.
  • the 2-bit DAI information in the medium determines that its channel selection resource number "corresponds to the resource numbered i in the ACK/NACK channel resource group 3, where 0 ⁇ z' ⁇ 3 , and feeds back ACK/NACK information through these resources.
  • DAI is used for resource indication instance 2:
  • the UE is configured with 3 carriers, and operates in the TDD uplink and downlink configuration 0, and uses the PUCCH Format lb with channel selection transmission mode.
  • the base station first allocates three semi-static ACK/NACK channel resources to the UE through RRC signaling, and the specific ACK/NACK channel resource indication process is as follows:
  • the base station associates each channel resource with a DL grant as shown in FIG. Corresponding, and
  • the UE is dynamically notified by the PDCCH carrying the DL grant; the UE according to the 2-bit DAI information and the carrier number in the DL grant detected in the feedback window, according to the carrier number from small to large
  • DAI is used for resource indication instance 3:
  • the UE is configured with 4 carriers, and operates in TDD uplink and downlink configuration 0.
  • the PUCCH Format lb with channel selection transmission mode is adopted, and the cross-carrier scheduling mode is adopted.
  • the DL grant of all data packets in the feedback window is on the downlink primary carrier.
  • the DAI "00" state is declared to indicate the use of implicit resources.
  • the specific ACK/NACK channel resource indication process is as follows: The base station sets the 2-bit DAI in each DL grant in the feedback window to "00", and dynamically notifies the UE by using the PDCCH carrying the DL grant, as shown in FIG. 9;
  • the DAI indication in the PDCCH, according to the Rel-8 implicit resource indication manner passes the first of each PDCCH
  • DAI is used for resource indication instance 4:
  • the UE is configured with three carriers and works in TDD uplink and downlink configuration 2, using the PUCCH new structure transmission method based on DFT-S-OFDM.
  • the base station first allocates four semi-static ACK/NACK channel resources to the UE through RRC signaling.
  • the correspondence between the DAI state and the channel resource number is as shown in Table 3.
  • the specific ACK/NACK channel resource indication process is as follows: As a channel resource configured for the UE, the semi-static resource sets the 2-bit DAI in the DL grant of all downlink packets included in the feedback window to "01", and dynamically notifies the UE by the PDCCH carrying the DL grant, as shown in FIG.
  • the UE determines the ACK/NACK channel resource number according to the 2-bit D AI information in any one of the detected DL grants in the feedback window, and feeds back ACK/NACK information on the channel resource.
  • each functional unit in each embodiment of the present invention may be integrated into one processing module, or each unit may exist physically separately, or two or more units may be integrated into one module.
  • the above integrated modules can be implemented in the form of hardware or soft.
  • the form of the functional module is implemented.
  • the integrated modules, if implemented in the form of software functional modules and sold or used as separate products, may also be stored in a computer readable storage medium.
  • the above-mentioned storage medium may be a read only memory, a magnetic disk or an optical disk or the like.

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Abstract

本发明的实施例提出了一种反馈信息的信道资源指示方法,包括以下步骤:基站在下行调度信令DLgrant中给终端用户UE发送下行分配索引DAI比特,所述DAI比特至少可以用于指示反馈信息的信道资源;所述基站通过物理下行控制信道PDCCH向所述UE发送DLgrant。本发明提出的上述方案,通过重用LTETDD系统DLgrant中的2比特DAI,不需在PDCCH中增加额外比特,即可实现LTE-AUE所使用的ACK/NACK信道资源的指示。该方法简单、易于实施,不增加下行控制信令开销,适用于LTE-ATDD系统的ACK/NACK复用传输模式。

Description

反馈信息的信道资源指示方法及设备
相关申请的交叉参考
本申请要求于 2010年 7月 28 日提交的题目为 "反馈信息的信道资源 指示方法及设备" 的中国专利申请第 201010239844.3号的优先权, 其全部 内容并入本申请作为参考。 技术领域
本发明涉及数字通信领域, 具体而言, 本发明涉及反馈信息的信道资 源指示方法及设备。 背景技术
LTE-A ( Long Term Evolution-Advanced )是 LTE技术的后续演进, 俗 称 3.9G。 LTE ( Long Term Evolution, 长期演进)与 4G相比较, 除最大带 宽、上行峰值速率两个指标略低于 4G要求外,其他技术指标都已经达到了 4G标准的要求。 而将 LTE正式带入 4G的 LTE-A的技术整体设计则远超 过了 4G的最小需求。 在 2008年 6月, 3GPP完成了 LTE-A的技术需求报 告, 提出了 LTE-A 的最小需求: 下行峰值速率 lGbps , 上行峰值速率 500Mbps, 上下行峰值频谱利用率分别达到 15Mbps/Hz和 30Mbps/Hz。 这 些参数已经远高于 ITU的最小技术需求指标, 具有明显的优势。
对于长期演进多载波系统, 为支持比 LTE系统更宽的系统带宽, 比如 100MHz,—种可能是直接分配 100M带宽的频谱。图 1示出了单频谱系统。 将分配给现有的系统一些频谱, 如图 1 中所示的单频谱聚合起来, 凑成大 带宽供给长期演进多载波系统使用。 图 2示出了频谱聚合系统。 如图 2中 所示, 此时系统中上下行载波可以不对称配置, 即用户可能会占用 个 载波进行下行传输, M≥l个载波进行上行传输。 当各个下行载波上的数据 独立进行编译码时, 用户将针对各个载波上的数据包分别进行 HARQ ( Hybrid- ARQ, 混合自动重传请求) 重传请求反馈, 即 ACK/NACK信息。 因此, 用户可能在一个上行子帧中同时向基站反馈多个 ACK/NACK信息。
LTE-A系统目前确定最多可支持 5个载波进行聚合。 需要在同一个上 行子帧内进行 ACK/NACK反馈的多个下行载波及下行子帧,在下文中简称 为"反馈窗口"。 对于 FDD系统, 反馈窗口的大小为 N, 其中 N为 UE下行 聚合载波数或下行激活载波数。 对于 TDD系统, 反馈窗口的大小为 ΝχΜ, 其中 Ν为 UE下行聚合载波数或下行激活载波数, M对应在同一上行子帧 进行反馈的下行子帧数量, 对于不同的上下行配置及上行子帧, M的取值 不同, 即表 1中每一栏 K的数量。
表 1 TDD下行相关集合索引 K;
Figure imgf000004_0001
目前 , LTE-A系统中 ACK/NACK Multiplexing复用方案已确定为: 对于支持在同一上行子帧中最多反馈 4 比特 ACK/NACK 信息的 LTE-A UE, 釆用 PUCCH Format lb with channel selection传输方案, 该方案通过 UE在多个信道资源进行选择传输来区分不同的 ACK/NACK的状态, 对于 2~4比特 ACK/NACK反馈, 需要 2~4个上行控制信道资源; 对于支持在同 一上行子帧中 ACK/NACK反馈信息多于 4 比特的 LTE-A UE, 釆用基于 DFT-S-OFDM的 PUCCH新结构传输方案(后续命名为 PUCCH format 3方 案) , 需要一个上行控制信道资源。
在 UE使用 PUCCH进行 ACK/NACK反馈之前, UE首先需要获得一 个或多个 ACK/NACK传输可用的上行控制信道资源, 简称 ACK/NACK信 道资源, 由一个或多个信道资源编号表示。 在 LTE 系统中, UE对上行控 制信道资源进行了最大预留, 即每个承载 DL grant 的 PDCCH ( Physical Downlink Control Channel, 物理下行控制信道) 都对应着一个可用的上行 控制信道资源 (可传输 PUCCH format 1/la/lb ) 。 对于动态调度的下行数 据包,其 ACK/NACK信道资源编号将根据调度该数据包的 PDCCH的第一 个 CCE ( Control Channel Element, 控制信道单元)编号隐式获得。 对于半 持续调度的下行数据包, 根据反馈的周期, 基站可预先知道各信息传输的 具体时间位置, 因此 ACK/NACK 信道资源编号通过激活该半持续调度的 PDCCH的 TPC ( Transmit Power Control, 发送功率控制)域来指示, 该信 道资源为基站通过 RRC信令预先分配给 UE的半静态上行控制信道资源池 中的一个信道资源。
在 LTE-A CA ( Carrier Aggregation, 载波聚合) 系统中, 为保证与 R8 系统的兼容, 每个上行载波中总会按照 LTE Rel-8的隐式资源通知方式预 留其配对下行载波所对应的上行控制信道资源。 但是, 当 UE在多个下行 载波上接收数据时, 如果依旧按照 LTE Rel-8 系统中的方式进行上行控制 信道资源的隐式通知, 则系统要在每个上行载波内都为各下行载波预留相 应的上行控制信道资源, 会造成各上行载波中严重的资源浪费, 从而影响 系统的传输效率。 为了降低 LTE-A CA UE的上行资源预留开销, 可以对 C A UE配置半静态上行控制信道资源用于 ACK/NACK传输,且多个 C A UE 可共享这些半静态资源。 考虑到 LTE-A UE只能在一个配置的上行主载波 传输 PUCCH , 当该上行主载波所对应的下行载波中无动态调度下行数据包 的 PDCCH时, UE无法获得隐式资源, 只能使用半静态配置的上行控制信 道资源传输 ACK/NACK。 因此, 单纯的 Rel-8的隐式资源指示方法不再适 用于 LTE-A CA UE的 ACK/NACK反馈, 需要某种机制通知 UE使用的具 体 ACK/NACK资源, 如釆用承载 DL grant的 PDCCH动态通知 UE使用隐 式 ACK/NACK隐式资源或具体的一个或一组半静态配置的 ACK/NACK信 道资源。
LTE TDD 系统中, 基站在 DL grant 中发送 2 比特 DAI ( Downlink Assignment Index, 下行配置索引) , 该 DAI为计数器, 表示当前 PDCCH 为反馈窗口内的第几个 PDCCH ( PDCCH 包括动态调度数据包的 PDCCH 以及释放半持续调度的 PDCCH ) , 以帮助 UE确定反馈窗口内数据包的调 度情况。 在 LTE-A TDD系统中, 当 UE进行 ACK/NACK 复用传输时, 总 是反馈对应反馈窗口 ΝχΜ大小的 ACK/NACK反馈信息,每个 ACK/NACK 反馈信息的具体位置可根据聚合或激活的下行载波位置和调度的下行子帧 位置确定, 对于没有下行数据包的下行载波和子帧位置, UE 总是反馈
NACK。 因此, DL grant中的 2比特 DAI信息在 LTE-A TDD系统中没有充 分利用。 发明内容
本发明的目的旨在至少解决上述技术缺陷之一, 特别针对 DL grant中 的 2比特 DAI在 LTE-A TDD系统中没有充分利用, 从而通过利用 2比特 DAI信息,进行 ACK/NACK 复用传输时重用来指示 ACK/NACK信道资源。
为了达到上述目的, 本发明的实施例一方面提出了一种反馈信息的信 道资源指示方法, 包括以下步骤:
基站在下行调度信令 DL grant 中给终端用户 UE 发送下行分配索引 DAI比特, 所述 DAI比特至少可以用于指示反馈信息的信道资源;
所述基站通过物理下行控制信道 PDCCH向所述 UE发送 DL grant。 本发明的实施例另一方面提出了一种反馈信息的信道资源指示方法, 包括以下步骤:
终端用户 UE通过物理下行控制信道 PDCCH接收基站发送的下行调度 信令 DL grant;
所述 DL grant包括下行分配索引 DAI比特,所述 DAI比特至少可以用 于指示反馈信息的信道资源。
本发明的实施例另一方面提出了一种基站, 包括发送模块以及指示模 块,
所述发送模块,用于通过物理下行控制信道 PDCCH向所述 UE发送下 行调度信令 DL grant, 所述 DL grant中包括下行分配索引 DAI比特;
所述指示模块, 至少用于通过所述 DAI比特向所述 UE指示反馈信息 的信道资源。
本发明的实施例另一方面提出了一种用户设备 UE,包括接收模块以及 获取模块,
所述接收模块, 用于通过物理下行控制信道 PDCCH接收基站发送的 下行调度信令 DL grant;
所述获取模块, 用于根据所述 DL grant中包括的下行分配索引 DAI比 特获取指示信息, 所述 DAI比特至少可以用于指示反馈信息的信道资源。
本发明提出的上述方案, 通过重用 LTE TDD系统 DL grant中的 2比 特 DAI, 用于指示 LTE- A UE ACK/NACK 复用传输的信道资源的方法。基 站根据具体的 ACK/NACK反馈模式及传输方案, 通过 DL grant中的 DAI 信息域, 不需在 PDCCH中增加额外比特, 即可实现 LTE-A UE所使用的 ACK/NACK信道资源的指示。该方法易于实施,不增加下行控制信令开销, 适用于 LTE-A TDD系统的 ACK/NACK复用传输模式。 本发明提出的上述 方案, 对现有系统的改动很小, 不会影响系统的兼容性, 而且实现简单、 高效。
本发明附加的方面和优点将在下面的描述中部分给出, 部分将从下面 的描述中变得明显, 或通过本发明的实践了解到。 附图说明
本发明上述的和 /或附加的方面和优点从下面结合附图对实施例的描 述中将变得明显和容易理解, 其中:
图 1为单频谱系统示意图;
图 2为频谱聚合系统示意图;
图 3为根据本发明实施例基站侧反馈信息的信道资源指示方法的流程 图;
图 4为根据本发明实施例 UE侧反馈信息的信道资源获取方法的流程 图;
图 5为根据本发明实施例基站的结构示意图;
图 6为根据本发明实施例 UE的结构示意图;
图 7为 DAI用于资源指示示例 1 ;
图 8为 DAI用于资源指示示例 2;
图 9为 DAI用于资源指示示例 3;
图 10为 DAI用于资源指示示例 4。 具体实施方式
下面详细描述本发明的实施例, 所述实施例的示例在附图中示出, 其 中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功 能的元件。 下面通过参考附图描述的实施例是示例性的, 仅用于解释本发 明, 而不能解释为对本发明的限制。
在 LTE-A TDD系统中, 若 UE被配置了多个下行载波, 且 UE被配置 使用 ACK/NACK 复用模式进行 ACK/NACK反馈, 则 DL grant中的 DAI 可用来指示 ACK/NACK信道资源;
否则, DL grant中的 DAI按照 LTE TDD系统中的使用方法, 即 DAI 为计数器, 表示反馈窗口内需要反馈信息的 PDCCH的个数, 以帮助 UE确 定反馈窗口内数据包的调度情况。对于动态调度的下行数据包 , ACK/NACK 信道资源可根据 Rel-8 TDD的隐式资源指示方式获得; 对于半静态调度的 下行数据包, ACK/NACK信道资源为激活半持续调度数据包的 PDCCH中 T P C域所指示的上行控制信道资源, 详见背景介绍部分。
为了实现本发明之目的, 本发明提出了一种反馈信息的信道资源指示 方法, 包括以下步骤: 基站在下行调度信令 DL grant中给终端用户 UE发 送下行分配索引 DAI比特,所述 DAI比特至少可以用于指示反馈信息的信 道资源;所述基站通过物理下行控制信道 PDCCH向所述 UE发送 DL grant„ 如图 3所示, 为根据本发明实施例基站侧反馈信息的信道资源指示方 法的流程图, 包括以下步骤:
S101 : 基站在 DL grant中给 UE发送 DAI比特, 其中 DAI比特至少可 以用于指示反馈信息的信道资源。
在步骤 S101中, DAI比特还可以用于指示对应同一个上行子帧进行信 息反馈的一个下行子帧集合中需要反馈信息的 PDCCH的数目。
具体而言, 对于不同的情况, DAI比特具有不同的指示含义, 例如: 若 UE被配置多个下行载波, 则 DAI比特用于指示反馈信息的信道资 源;
否则, DAI 比特用于指示对应同一个上行子帧进行信息反馈的一个下 行子帧集合中需要反馈信息的 PDCCH的数目。
对于 DAI比特用于指示反馈信息的信道资源的情况下, 基站通过高层 信令, 例如 RRC信令, 给 UE配置至少一组反馈信息信道资源, 至少一组 反馈信息信道资源的每组信道资源包括至少一个反馈信息信道资源。
进一步而言, 基站通过 DAI比特向 UE指示至少一组反馈信息信道资 源中的一组信道资源, 用于传输 UE的反馈信息。
或者, 基站通过 DAI比特向 UE指示高层配置的至少一组反馈信息信 道资源以外的反馈信息信道资源;
高层配置的至少一组反馈信息信道资源以外的反馈信息信道资源由 UE通过 PDCCH的控制信道元素 CCE的最低序号得到, 或通过激活半持 续调度的 PDCCH的 TPC域指示信息获得。
S103 : 基站通过 PDCCH向 UE发送 DL grant信息。
通过上述方案, 基站通过 DAI向 UE发送信道资源指示。
相应地, 如图 4所示, 为根据本发明实施例终端侧反馈信息的信道资 源获取方法的流程图, 包括以下步骤:
S201 : 终端用户 UE通过 PDCCH接收基站发送的 DL grant;
S203: UE根据 DL grant包括的下行分配索引 DAI比特获取指示信息, DAI比特至少可以用于指示反馈信息的信道资源。
此外, DAI 比特还可以用于指示对应同一个上行子帧进行信息反馈的 一个下行子帧集合中需要反馈信息的 PDCCH的数目。
具体而言, 对于不同的情况, UE获取的 DAI比特具有不同的指示含 义 , 例如:
若 UE被配置多个下行载波, 则 DAI比特用于指示反馈信息的信道资 源;
否则, DAI 比特用于指示对应同一个上行子帧进行信息反馈的一个下 行子帧集合中需要反馈信息的 PDCCH的数目。
对于 DAI比特用于指示反馈信息的信道资源的情况下, 基站通过高层 信令, 例如 RRC信令, 给 UE配置至少一组反馈信息信道资源, 至少一组 反馈信息信道资源的每组信道资源包括至少一个反馈信息信道资源。 进一步而言, UE通过基站发送的 DAI比特确定至少一组反馈信息信 道资源中的一组信道资源, 用于传输 UE的反馈信息。
或者, UE通过基站发送的 DAI比特确定高层配置的至少一组反馈信 息信道资源以外的反馈信息信道资源;
高层配置的至少一组反馈信息信道资源以外的反馈信息信道资源由 UE通过 PDCCH的控制信道元素 CCE的最低序号得到, 或通过激活半持 续调度的 PDCCH的 TPC域指示信息获得。
如图 5所示, 为根据本发明实施例基站 100的结构示意图, 包括发送 模块 110以及指示模块 120。
其中,发送模块 110用于通过物理下行控制信道 PDCCH向 UE发送下 行调度信令 DL grant, DL grant中包括下行分配索引 DAI比特。
指示模块 120至少用于通过 DAI比特向 UE指示反馈信息的信道资源。 具体而言, 指示模块 120还用于: 通过 DAI比特指示对应同一个上行 子帧进行信息反馈的一个下行子帧集合中需要反馈信息的 PDCCH的数目。
作为上述基站 100的实施例, 若 UE被配置多个下行载波, 则指示模 块 120用于通过 DAI比特指示反馈信息的信道资源;
否则, 通过 DAI比特指示对应同一个上行子帧进行信息反馈的一个下 行子帧集合中需要反馈信息的 PDCCH的数目。
此外, 基站 100进一步包括配置模块 130 ,
配置模块 130通过高层信令给 UE配置至少一组反馈信息信道资源, 至少一组反馈信息信道资源的每组信道资源包括至少一个反馈信息信道资 源。
作为上述基站 100的实施例, 指示模块 120通过 DAI比特向 UE指示 至少一组反馈信息信道资源中的一组信道资源, 用于传输 UE的反馈信息。
作为上述基站 100的实施例, 指示模块 120通过 DAI比特向 UE指示 高层配置的至少一组反馈信息信道资源以外的反馈信息信道资源;
高层配置的至少一组反馈信息信道资源以外的反馈信息信道资源由 UE通过 PDCCH的控制信道元素 CCE的最低序号得到, 或通过激活半持 续调度的 PDCCH的 TPC域指示信息获得。 如图 6所示, 为根据本发明实施例 UE200的结构示意图, 包括接收模 块 210以及获取模块 220。
其中, 接收模块 210用于通过 PDCCH接收基站发送的 DL grant。
获取模块 220用于根据 DL grant中包括的下行分配索引 DAI比特获取 指示信息, DAI比特至少可以用于指示反馈信息的信道资源。
作为上述 UE200的实施例,获取模块 220获取的 DAI比特还可以用于 指示对应同一个上行子帧进行信息反馈的一个下行子帧集合中需要反馈信 息的 PDCCH的数目。
作为上述 UE200的实施例, 若 UE被配置多个下行载波, 则获取模块 220确定 DAI比特用于指示反馈信息的信道资源;
否则, 获取模块 220确定 DAI比特用于指示对应同一个上行子帧进行 信息反馈的一个下行子帧集合中需要反馈信息的 PDCCH的数目。
作为上述 UE200的实施例, 接收模块 210接收基站的高层信令, 高层 信令给 UE 配置至少一组反馈信息信道资源, 至少一组反馈信息信道资源 的每组信道资源包括至少一个反馈信息信道资源。
作为上述 UE200的实施例,获取模块 220通过基站发送的 DAI比特确 定至少一组反馈信息信道资源中的一组信道资源, 用于传输 UE 的反馈信 息。
作为上述 UE200的实施例,获取模块 220通过基站发送的 DAI比特确 定高层配置的至少一组反馈信息信道资源以外的反馈信息信道资源;
高层配置的至少一组反馈信息信道资源以外的反馈信息信道资源由 UE通过 PDCCH的控制信道元素 CCE的最低序号得到, 或通过激活半持 续调度的 PDCCH的 TPC域指示信息获得。
为了进一步阐述本发明之目的, 下面对本发明实施例基站侧反馈信息 的信道资源指示方法又一个实例进行介绍, 包括以下步骤:
S310: 基站通过高层信令给 UE配置反馈信息的信道资源。
具体而言, 当所述 UE 配置了使用 PUCCH Format lb with channel selection结构传输 ACK/NACK反馈信息时, 通过高层信令给所述 UE配置 反馈信, ^的信道资源包括以下任意一种方式: 通过高层信令给所述 UE配置 P组半静态 ACK/NACK信道资源, 每 组中包含 K个 PUCCH format 1/la/lb格式的上行控制信道资源, 较优的, 当 DAI t匕特为 2 t匕特时, 1<P<4 , 2<K<4;
通过高层信令给所述 UE配置 Κ个半静态 ACK/NACK信道资源, 较 优的 , 当 D AI比特为 2比特时 , 2≤K≤4;
通过高层信令给所述 UE配置 Q组半静态 ACK/NACK信道资源, 每 组中包含 K个 PUCCH format 1/la/lb格式的上行控制信道资源, 较优的, 当 DAI 匕#为 2 匕#时, 1<Q<3 , 2≤K≤4。
当所述 UE 配置了使用基于 DFT-S-OFDM 的 PUCCH 新结构传输 ACK/NACK反馈信息时, 通过高层信令给所述 UE配置反馈信息的半静态 信道资源方式为:
通过高层信令给所述 UE配置 R个半静态 ACK/NACK信道资源, 较 优的, 当 DAI比特为 2比特时, 1≤R≤4。
S320: 基站通过 DL grant中的 DAI对信道资源进行指示。
在步骤 S320中, 基站从步骤 S310配置的信道资源中选择相应的信道 资源并通过下行调度信令 DL grant中的下行分配索引 DAI对所述相应的信 道资源进行指示。
相应于步骤 S310的不同配置方式, DAI的状态表示不同的指示含义。 例如:
当所述 UE配置了使用 PUCCH Format lb with channel selection结构传 输 ACK/NACK反馈信息时, DAI的状态含义可以为以下任意一种:
当通过高层信令给所述 UE配置 P组半静态 ACK/NACK信道资源, 每组中包含 K个 PUCCH format 1/la/lb格式的上行控制信道资源, 1≤P≤4 , 2<K<4 , 则:
通过重用 LTE TDD系统 DL grant中的 2比特 DAI信息指示所述 P组 半静态 ACK/NACK信道资源中的一组资源;
当通过高层信令给所述 UE配置 K个半静态 ACK/NACK信道资源, 1<K<4 , 则:
通过重用 LTE TDD系统 DL grant中的 2比特 DAI信息指示所述 K个 半静态 ACK/NACK信道资源的使用顺序;
当通过高层信令给所述 UE配置 Q组半静态 ACK/NACK信道资源, 每组中包含 K个 PUCCH format 1/la/lb格式的上行控制信道资源, 1≤Q≤3 , 2<K<4 , 则:
通过重用 LTE TDD系统 DL grant中的 2比特 DAI信息 4个状态中的 一个指示所述 UE使用隐式资源, 剩余 3个状态指示所述 UE的 Q组半静 态 ACK/NACK信道资源中的一组资源。
当所述 UE 配置了使用基于 DFT-S-OFDM 的 PUCCH 新结构传输 ACK/NACK反馈信息时, 通过高层信令给所述 UE配置反馈信息的半静态 信道资源方式为通过高层信令给所述 UE配置 R个半静态 ACK/NACK信 道资源, 1≤R≤4 , 则 DAI的状态含义可以为:
通过重用 LTE TDD系统 DL grant中的 2比特 DAI信息指示所述 R个 半静态 ACK/NACK信道资源中的一个资源。
S330: 基站通过 PDCCH向 UE发送 DL grant信息。
在步骤 S330中, 基站通过 PDCCH向 UE发送 DL grant信息。
相应地, 为根据本发明实施例终端侧反馈信息的信道资源获取方法又 一个实例进行介绍, 包括以下步骤:
S410:用户设备 UE通过高层信令接收基站发送给 UE的配置的反馈信 息所使用的信道资源。
具体而言, 当所述 UE 配置了使用 PUCCH Format lb with channel selection结构传输 ACK/NACK反馈信息时, 所述 UE通过高层信令接收基 站发送给所述 UE的反馈信息的半静态信道资源包括以下任意一种方式: 通过高层信令配置 P组半静态 ACK/NACK信道资源, 每组中包含 K 个 PUCCH format 1/la/lb格式的上行控制信道资源, 较优的, 当 DAI比特 为 2比特时, 1<P<4 , 2<K<4;
通过高层信令配置 Κ个半静态 ACK/NACK信道资源,较优的, 当 DAI 比特为 2比特时, 2≤K≤4;
通过高层信令配置 Q组半静态 ACK/NACK信道资源, 每组中包含 K 个 PUCCH format 1/la/lb格式的上行控制信道资源, 较优的, 当 DAI比特 为 2比特时, 1 <Q<3 , 2<Κ<4。
当所述 UE 配置了使用基于 DFT-S-OFDM 的 PUCCH 新结构传输 ACK/NACK反馈信息时, 所述 UE通过高层信令接收基站发送给所述 UE 的反馈信息的半静态信道资源方式为:
通过高层信令配置 R个半静态 ACK/NACK信道资源,较优的, 当 DAI 比特为 2比特时, 1≤R≤4。
S420 : UE根据反馈窗口检测下行调度信令 DL grant中的 2比特 DAI , 确定反馈信息所使用的信道资源。
具体而言, 相应于步骤 S410中不同的配置方式, UE检测的 DAI具有 不同的含义, 例如:
当所述 UE配置了使用 PUCCH Format lb with channel selection结构传 输 ACK/NACK反馈信息时, DAI的含义可以为以下任意一种:
当通过高层信令配置 P组半静态 ACK/NACK信道资源,每组中包含 K 个 PUCCH format 1/l a/lb格式的上行控制信道资源, 1≤P≤4 , 2<K<4 , 则: 所述 UE根据反馈窗口检测下行调度信令 DL grant中的 2比特 DAI信 息,确定所述 P组半静态 ACK/NACK信道资源中的一组作为反馈信息传输 的信道资源;
当通过高层信令配置 K个半静态 ACK/NACK信道资源, 2≤K≤4 , 则: 所述 UE根据反馈窗口检测下行调度信令 DL grant中的 2比特 DAI信 息, 确定所述 K个半静态 ACK/NACK信道资源的使用顺序;
当通过高层信令配置 Q组半静态 ACK/NACK信道资源,每组中包含 K 个 PUCCH format 1/l a/lb格式的上行控制信道资源, 1≤Q≤3 , 2<K<4 , 则: 所述 UE根据反馈窗口检测下行调度信令 DL grant中的 2比特 DAI信 息, 确定使用隐式资源或所述 Q组半静态 ACK/NACK信道资源中的一组 作为反馈信息传输的信道资源。
当所述 UE 配置了使用基于 DFT-S-OFDM 的 PUCCH 新结构传输 ACK/NACK反馈信息时, 所述 UE通过高层信令接收基站发送给所述 UE 的反馈信息的半静态信道资源方式为通过高层信令配置 R 个半静态 ACK/NACK信道资源, 1≤R≤4 , 则 DAI的含义可以为: 所述 UE根据反馈窗口检测下行调度信令 DL grant中的 2比特 DAI信 息, 确定所述 R个半静态 ACK/NACK信道资源中的一个作为反馈信息传 输的信道资源。
S430: UE通过反馈信息所使用的信道资源反馈 ACK/NACK信息。 相应于本发明提出的上述方法示例, 基站设备包括配置模块 510、 指 示模块 520以及发送模块 530。
其中, 配置模块 510用于通过高层信令给 UE配置反馈信息的半静态 信道资源; 指示模块 520用于重用 LTE TDD系统下行调度信令 DL grant 中的 2比特下行分配索引 DAI指示 UE使用隐式资源或使用高层信令配置 的信道资源中的一个或一组资源。
当 UE配置了使用 PUCCH Format lb with channel selection结构传输 ACK/NACK反馈信息时, 配置模块 510通过高层信令给 UE配置反馈信息 的半静态信道资源包括以下任意一种方式:
配置模块 510通过高层信令给 UE配置 P组半静态 ACK/NACK信道 资源, 每组中包含 K个 PUCCH format 1/la/lb格式的上行控制信道资源, 支^ L々, 当 DAI t匕特为 2 t匕特时, 1<P<4 , 2<K<4;
配置模块 510通过高层信令给 UE配置 Κ个半静态 ACK/NACK信道 资源, 较优的, 当 DAI比特为 2比特时, 2≤K≤4;
配置模块 510通过高层信令给 UE配置 Q组半静态 ACK/NACK信道 资源, 每组中包含 K个 PUCCH format 1/la/lb格式的上行控制信道资源, 较优的, 当 DAI比特为 2比特时, 1≤Q≤3 , 2≤K≤4。
当 UE 配置了使用基于 DFT-S-OFDM 的 PUCCH 新结构传输 ACK/NACK反馈信息时, 配置模块 510通过高层信令给 UE配置反馈信息 的半静态信道资源方式为:
配置模块 510通过高层信令给 UE配置 R个半静态 ACK/NACK信道 资源, 较优的, 当 D AI比特为 2比特时, 1≤R≤4。
当 UE配置了使用 PUCCH Format lb with channel selection结构传输 ACK/NACK反馈信息时,指示模块 520重用 DAI指示 UE使用的信道资源 的方式可以为以下任意一种: 当配置模块 510通过高层信令给 UE配置 P组半静态 ACK/NACK信 道资源,每组中包含 K个 PUCCH format 1/la/lb格式的上行控制信道资源, 1<P<4 , 2<K<4, 则:
指示模块 520通过重用 LTE TDD系统 DL grant中的 2比特 DAI信息 指示 P组半静态 ACK/NACK信道资源中的一组资源;
当配置模块 510通过高层信令给 UE配置 K个半静态 ACK/NACK信 道资源, 2≤K≤4 , 则:
指示模块 520通过重用 LTE TDD系统 DL grant中的 2比特 DAI信息 指示 K个半静态 ACK/NACK信道资源的使用顺序;
当配置模块 510通过高层信令给 UE配置 Q组半静态 ACK/NACK信 道资源,每组中包含 K个 PUCCH format 1/la/lb格式的上行控制信道资源, 1<Q<3 , 2<K<4 , 则:
指示模块 520通过重用 LTE TDD系统 DL grant中的 2比特 DAI信息 4个状态中的一个指示 UE使用隐式资源,剩余 3个状态指示 UE的 Q组半 静态 ACK/NACK信道资源中的一组资源。
当 UE 配置了使用基于 DFT-S-OFDM 的 PUCCH 新结构传输 ACK/NACK反馈信息时,配置模块 510通过高层信令给 UE配置 R个半静 态 ACK/NACK信道资源, 1≤R≤4 , 则指示模块 520重用 DAI指示 UE使用 的信道资源的方式可以为:
指示模块 520通过重用 LTE TDD系统 DL grant中的 2比特 DAI信息 指示 R个半静态 ACK/NACK信道资源中的一个资源。
发送模块 530用于通过 PDCCH向 UE发送 DL grant信息。
相应于本发明提出的上述方法示例, UE包括接收模块 610、 获取模块 620以及发送模块 630。
其中, 接收模块 610用于通过高层信令接收基站发送给 UE的配置的 反馈信息的半静态信道资源; 获取模块 620用于根据反馈窗口检测下行调 度信令 DL grant中的 2比特下行分配索引 DAI, 获取反馈信息所使用的信 道资源。
当 UE配置了使用 PUCCH Format lb with channel selection结构传输 ACK/NACK反馈信息时, 接收模块 610通过高层信令接收基站发送给 UE 的配置的反馈信息的半静态信道资源包括以下任意一种方式:
通过高层信令配置 P组半静态 ACK/NACK信道资源, 每组中包含 K 个 PUCCH format 1/l a/lb格式的上行控制信道资源, 较优的, 当 DAI比特 为 2比特时, 1 <P<4 , 2<K<4 ;
通过高层信令配置 Κ个半静态 ACK/NACK信道资源,较优的, 当 DAI 比特为 2比特时, 2≤K≤4 ;
通过高层信令配置 Q组半静态 ACK/NACK信道资源, 每组中包含 K 个 PUCCH format 1/l a/lb格式的上行控制信道资源, 较优的, 当 DAI比特 为 2比特时, 1 <Q<3 , 2<K<4。
当 UE 配置了使用基于 DFT-S-OFDM 的 PUCCH 新结构传输 ACK/NACK反馈信息时, 接收模块 610通过高层信令接收基站发送给 UE 的配置的反馈信息的半静态信道资源方式为:
通过高层信令配置 R个半静态 ACK/NACK信道资源,较优的, 当 DAI 比特为 2比特时, 1≤R≤4。
当 UE配置了使用 PUCCH Format lb with channel selection结构传输 ACK/NACK 反馈信息时, 获取模块 620 根据反馈窗口检测下行调度信令 DL grant中的 2比特下行分配索引 DAI , 获取反馈信息所使用的信道资源 的方式包括以下任意一种方式:
当通过高层信令配置 P组半静态 ACK/NACK信道资源,每组中包含 K 个 PUCCH format 1/l a/lb格式的上行控制信道资源, 1≤P≤4 , 2<K<4 , 则: 获取模块 620根据反馈窗口检测下行调度信令 DL grant 中的 2 比特 DAI信息, 确定 P组半静态 ACK/NACK信道资源中的一组作为反馈信息 传输的信道资源;
当通过高层信令配置 K个半静态 ACK/NACK信道资源, 2≤K≤4 , 则: 获取模块 620根据反馈窗口检测下行调度信令 DL grant 中的 2 比特
DAI信息, 确定 K个半静态 ACK/NACK信道资源的使用顺序;
当通过高层信令配置 Q组半静态 ACK/NACK信道资源,每组中包含 K 个 PUCCH format 1/l a/lb格式的上行控制信道资源, 1≤Q≤3 , 2<K<4 , 则: 获取模块 620根据反馈窗口检测下行调度信令 DL grant 中的 2 比特 DAI信息, 确定使用隐式资源或 Q组半静态 ACK/NACK信道资源中的一 组作为反馈信息传输的信道资源;
当 UE 配置了使用基于 DFT-S-OFDM 的 PUCCH 新结构传输 ACK/NACK反馈信息时, 通过高层信令配置 R个半静态 ACK/NACK信道 资源, 1≤R≤4 , 则获取模块 620根据反馈窗口检测下行调度信令 DL grant 中的 2比特下行分配索引 DAI,确定反馈信息所使用的信道资源的方式为: 获取模块 620根据反馈窗口检测下行调度信令 DL grant 中的 2 比特 DAI信息, 确定 R个半静态 ACK/NACK信道资源中的一个作为反馈信息 传输的信道资源。
发送模块 630用于通过反馈信息的信道资源反馈 ACK/NACK信息。 本发明提出的上述方案, 通过重用 LTE TDD系统 DL grant中的 2比 特 DAI, 用于指示 LTE- A UE ACK/NACK 复用传输的信道资源的方法。基 站根据具体的 ACK/NACK反馈模式及传输方案, 通过 DL grant中的 DAI 信息域, 不需在 PDCCH中增加额外比特, 即可实现 LTE-A UE所使用的 ACK/NACK信道资源的指示。该方法易于实施,不增加下行控制信令开销, 适用于 LTE-A TDD系统的 ACK/NACK 复用传输模式。本发明提出的上述 方案, 对现有系统的改动很小, 不会影响系统的兼容性, 而且实现简单、 高效。
本发明提出的上述方法或设备, 公开了通过 DAI指示信道资源的多种 方式, 上述方案可以分为多种方式, 为了便于进一步理解本发明, 下面结 合具体的环境对本发明的方法、 设备作进一步阐述。 为了简单起见, 后面 提交的设备不在分模块论述, 对外将以整体的设备特性描述, 具体功能模 块区分见之前的描述。
当 UE 配置了使用 PUCCH Format lb with channel selection 传输 ACK/NACK反馈信息时, 归纳上述方法或设备, 通常可以以三种方式进行 指示。
方式一: DL grant中的 DAI信息的不同状态用来指示高层信令预先配 置给 UE的至少一组半静态资源中的一组资源。 以 LTE TDD系统 DL grant 中的 2比特 DAI为例, DL grant中的 2比特 DAI信息的 4个状态 "00" 、 "01" 、 "10" 、 "11 " 用来指示 RRC信令预先配置给 UE的 P组半静态
ACK/NACK信道资源; 其中, 1≤P≤4; DAI指示信息中的 4个状态 "00" 、 "01" 、 " 10" 、 "11"与 P个半静态 ACK/NACK信道资源组编号 [0,1, ... ,P-1] 的对应关系在基站端与 UE 端釆用相同的预定义规则。 较简单的, 例如: 可按照数值顺序直接对应, 如表 2所示。
实际应用中可能如下体现:
基站根据 CA UE的配置和调度情况,首先通过 RRC信令给每个 CA UE 配置 P组半静态 ACK/NACK信道资源, 每组中包含 K个 PUCCH format 1/la/lb 格式的上行控制信道资源, 其中 2≤K≤4。 基站在 Ρ 组半静态 ACK/NACK信道资源中选择编号为 a 的一组信道资源作为配置给 UE 的 ACK/NACK 信道资源组, 0≤a≤P-l , 将所有包含在反馈窗口内的下行数据 包的 DL grant中的 2比特 DAI设置为与该 ACK/NACK信道资源组编号 a 相对应的状态, 并通过承载 DL grant的 PDCCH动态通知 UE。 UE根据反 馈窗口内任意一个检测到的 DL grant中的 2比特 DAI信息, 确定在上行子 帧使用的半静态 ACK/NACK信道资源组,并使用该组中的 K个 ACK/NACK 信道资源反馈 ACK/NACK信息。
其中, UE在 ACK/NACK映射表格中所使用的 K个 ACK/NACK信道 资源 U ≤i≤K- ,与 UE根据 DAI确定的半静态 ACK/NACK信道资源 组 a中的 K个 ACK/NACK信道资源的对应关系在基站端与 UE端釆用相同
(1)
的预定义规则。 较简单的, 例如: 可按照顺序——对应, 即 ^ ^与半静态 ACK/NACK信道资源组 a中的编号为 i的资源相对应, 其中 0≤7'≤ -1。
基站可给多个用户配置相同的 P组半静态 ACK/NACK资源,并通过调 度限制同一个反馈窗口中最多只有 P个用户被调度, 每个用户对应一组不 同的半静态 ACK/NACK资源, 以此提高资源的利用率。
表 2 DAI状态与 ACK/NACK信道资源组编号的对应关系
DAI状态 ACK/NACK信道资源 (组) 编号
0 0 0
0 1 1
1 0 2
1 1 3 方式二: DL grant中的 DAI信息的不同状态用来指示高层信令预先配 置给 UE的至少一个半静态资源的使用顺序。 以 LTE TDD系统 DL grant 中的 2比特 DAI为例, DL grant中的 2比特 DAI信息的 4个状态 "00" 、 "01" 、 "10" 、 "11 " 用来指示 RRC信令预先配置给 UE的 K个半静态 ACK/NACK信道资源, 其中, 2≤K≤4;
考虑到如果反馈窗口内下行数据包的 DL grant丟失,UE则无法获得该 DL grant对应的半静态 ACK/NACK信道资源, 因此只能使用考虑丟包问题 的 ACK/NACK映射表格;
其中, DAI指示信息中的 4个状态 "00" 、 "01 " 、 " 10" 、 " 11 " 与 K个半静态 ACK/NACK信道资源编号 [0,1,... ,Κ-l]的对应关系在基站端 与 UE 端釆用相同的预定义规则。 较简单的, 例如: 可按照数值直顺序接 对应, ^表 2所示。
实际应用中可能如下体现:
基站根据 CA UE的配置和调度情况,首先通过 RRC信令给每个 CA UE 配置 Κ个半静态 ACK/NACK信道资源。 基站将 K个半静态 ACK/NACK 信道资源分别对应反馈窗口内的一个下行数据包,将每个下行数据包的 DL grant中的 2比特 DAI设置为其所对应的 ACK/NACK信道资源编号 b相对 应的状态, 0≤b≤K-l , 并通过 载 DL grant的 PDCCH动态通知 UE。 UE 根据反馈窗口内检测到的 DL grant中的 2比特 DAI信息以及每个 DL grant 的调度顺序或载波编号顺序, 确定在上行子帧使用的 K 个半静态 ACK/NACK信道资源的顺序,即 CCHQ≤ ζ' _ 1与 K个半静态 ACK/NACK 信道资源之间的对应关系, 并按照该顺序使用这 K个 ACK/NACK信道资 源反馈 ACK/NACK信息。
其中, 信道资源"^ ^''Q≤ ≤ _1 , 与调度数据包顺序以及数据包所在 下行载波编号顺序的对应关系在基站端与 UE 端釆用相同的预定义规则。 较简单的, 例如: 可按照先载波编号从小到大, 后子帧调度顺序进行映射。
方式三: DL grant中的 DAI信息的不同状态中的一个状态用来指示 UE 使用隐式资源, 其余状态用来指示高层信令预先配置给 UE 的至少一组半 静态资源中的一组资源。以 LTE TDD系统 DL grant中的 2比特 DAI为例, DL grant中的 2比特 DAI信息的 4个状态 "00" 、 "01 " 、 " 10" 、 " 11 " 中的一个状态用来指示 UE使用隐式资源, 剩余 3个状态用来指示 RRC信 令预先配置给 UE的 Q组半静态 ACK/NACK信道资源; 其中, 1≤Q≤3 ; 其中, 隐式资源包括背景介绍中所述的预留资源以及半持续调度数据 包对应的半静态信道资源。
选择 DAI指示信息中的 4个状态 "00" 、 "01" 、 "10" 、 " 11 " 中 的哪个用来指示隐式资源以及剩余 3个 DAI状态与 Q个半静态 ACK/NACK 信道资源组编号 [0,1, ... ,Q-1]的对应关系在基站端与 UE 端釆用相同的预定 义规则。 较简单的, 例如: 可按照数值顺序直接对应, 如表 3所示。
实际应用中可能如下体现:
基站根据 CA UE的配置和调度情况,首先通过 RRC信令给每个 CA UE 配置 Q组半静态 ACK/NACK信道资源, 每组中包含 K个 PUCCH format 1/la/lb格式的上行控制信道资源, 其中, 2≤K≤4; 如果反馈窗口内下行数 据包的 DL grant丟失, UE则无法获得该 DL grant对应的隐式 ACK/NACK 信道资源, 因此只能使用考虑丟包问题的 ACK/NACK映射表格。
当反馈窗口内的所有承载下行数据包 DL grant的 PDCCH都在与上行 主载波(UL PCC ) 配对的下行主载波(DL PCC ) 上传输时, 由于上行主 载波存在该下行载波的上行控制信道资源预留, 可釆用 Rel-8 ACK/NACK 隐式资源。 以基站选择 DAI "00" 状态表示使用隐式资源为例: 基站将在 该下行载波上承载 DL grant的 PDCCH中的 2比特 DAI设置为 "00" , 表 示使用 Rel-8 ACK/NACK 隐式资源指示方式, 并通过承载 DL grant 的 PDCCH动态通知 UE。 UE根据反馈窗口内检测到的 DL grant中的 2比特 DAI信息以及每个 PDCCH的第一个 CCE编号, 在上行主载波上隐式确定 相应的 ACK/NACK信道资源, 使用这些信道资源反馈 ACK/NACK信息。
当反馈窗口内存在承载下行数据包 DL grant的 PDCCH在其他下行载 波(DL SCC )上传输时, 上行主载波上不存在其他下行载波的上行控制信 道资源预留, 需釆用半静态 ACK/NACK信道资源。 基站在 Q 组半静态 ACK/NACK信道资源中选择编号为 c 的一组信道资源作为配置给 UE 的 ACK/NACK信道资源组, 0≤c≤Q-l , 将包含在反馈窗口内的下行数据包的 DL grant中的 2比特 DAI设置为与该 ACK/NACK信道资源组编号 c相对 应的状态, 并通过承载 DL grant的 PDCCH动态通知 UE。 UE根据反馈窗 口内任意一个检测到的 DL grant中的 2比特 DAI信息, 确定在上行子帧使 用的半静态 ACK/NACK信道资源组,并使用该组中的 K个 ACK/NACK信 道资源反馈 ACK/NACK信息。
其中, UE在 ACK/NACK映射表格中所使用的 K个 ACK/NACK信道 资源 U ≤i≤K- ,与 UE根据 DAI确定的半静态 ACK/NACK信道资源 组 c中的 K个 ACK/NACK信道资源的对应关系在基站端与 UE端釆用相同
(1)
的预定义规则。 较简单的, 例如: 可按照顺序——对应, 即 ^ ^与半静态 ACK/NACK信道资源组 c中的编号为 i的资源相对应, 其中 0≤z'≤ -1。
基站可给多个用户配置相同的 Q组半静态 ACK/NACK资源, 并通过 调度限制同一个反馈窗口中最多只有 Q个用户被调度, 每个用户对应一组 不同的半静态 ACK/NACK资源, 以此提高资源的利用率。
表 3 DAI状态与 ACK/NACK信道资源组编号的对应关系
Figure imgf000022_0001
当 UE 配置了使用基于 DFT-S-OFDM 的 PUCCH 新结构传输 ACK/NACK反馈信息时, 归纳上述方法或设备, 通常可以釆用以下方式进 行指示:
DL grant中的 DAI信息的不同状态用来指示高层信令预先配置给 UE 的至少一个半静态资源中的一个资源。 以 LTE TDD系统 DL grant中的 2 比特 DAI为例, DL grant中的 2比特 DAI信息的 4个状态 "00" 、 "01 " 、 "10"、 "1 Γ用来指示 RRC信令预先配置给 UE的 R个半静态 ACK/NACK 信道资源; 其中, 1≤R≤4;
DAI指示信息中的 4个状态 "00" 、 "01" 、 " 10" 、 " 11 " 与 R个 半静态 ACK/NACK信道资源编号 [0,1,... ,R-1]的对应关系在基站端与 UE端 釆用相同的预定义规则。 较简单的, 例如: 可按照数值顺序直接对应, 如 表 2所示。 实际应用中可能如下体现:
基站根据 CA UE的配置和调度情况,首先通过 RRC信令给每个 CA UE 配置 R个半静态 ACK/NACK信道资源。基站在 R个半静态 ACK/NACK信 道资源中选择编号为 d信道资源作为配置给 UE的 ACK/NACK信道资源, 0<d<R-l , 将所有包含在反馈窗口内的下行数据包的 DL grant中的 2比特 DAI设置为与该 ACK/NACK信道资源编号 d相对应的状态, 并通过承载 DL grant的 PDCCH动态通知 UE。 UE根据反馈窗口内任意一个检测到的 DL grant中的 2比特 DAI信息,确定在上行子帧使用的半静态 ACK/NACK 信道资源, 并使用该资源反馈 ACK/NACK信息。
基站可给多个用户配置相同的 R个半静态 ACK/NACK资源, 并通过 调度限制同一个反馈窗口中最多只有 P个用户被调度, 每个用户对应一个 不同的半静态 ACK/NACK资源, 以此提高资源的利用率。
DAI用于资源指示实例 1 :
UE配置了 2个载波, 工作在 TDD上下行配置 1 , 釆用 PUCCH Format lb with channel selection传输方式。基站首先通过 RRC信令给该 UE配置 4 组半静态 ACK/NACK信道资源, 每组中包含 4个 PUCCH format 1/la/lb 格式的上行控制信道资源, D AI状态与信道资源组编号的对应关系如表 3 , 则具体的 ACK/NACK信道资源指示过程如下:基站选择编号 3的半静态资 源组作为配置给 UE 的信道资源组, 将所有包含在反馈窗口内的下行数据 包的 DL grant中的 2比特 DAI设置为 " 1 Γ ,并通过承载 DL grant的 PDCCH 动态通知 UE,如图 7所示; UE根据反馈窗口内任意一个检测到的 DL grant
(1)
中的 2比特 DAI信息,确定其信道选择资源编号" 与 ACK/NACK信道 资源组 3 中的编号为 i 的资源相对应, 其中 0≤z'≤3 , 并通过这些资源反馈 ACK/NACK信息。
DAI用于资源指示实例 2:
UE配置了 3个载波, 工作在 TDD上下行配置 0 , 釆用 PUCCH Format lb with channel selection传输方式。基站首先通过 RRC信令给该 UE配置 3 个半静态 ACK/NACK信道资源, 则具体的 ACK/NACK信道资源指示过程 如下: 基站按照如图 8所示为将每个信道资源与一个 DL grant相对应, 并 通过承载 DL grant的 PDCCH动态通知 UE; UE根据反馈窗口内检测到的 DL grant中的 2比特 DAI信息以及载波编号, 按照载波编号从小到大顺序
(1)
映射" pt/ccff ,! , 0 < / < 2 o
DAI用于资源指示实例 3 :
UE配置了 4个载波, 工作在 TDD上下行配置 0 , 釆用 PUCCH Format lb with channel selection传输方式, 釆用跨载波调度方式, 反馈窗口内的所 有数据包的 DL grant都在下行主载波(设为下行载波 1 )的 PDCCH上发送, 约定 DAI "00"状态表示使用隐式资源。 具体的 ACK/NACK信道资源指示 过程如下: 基站将反馈窗口内每个 DL grant中的 2比特 DAI设置为 "00" , 并通过承载 DL grant的 PDCCH动态通知 UE,如图 9所示; UE根据 PDCCH 中的 DAI指示, 按照 Rel-8隐式资源指示方式, 通过每个 PDCCH的第一
M(l)
个 CCE编号获得" Ρ^ , 0≤/ < 3 ο
DAI用于资源指示实例 4:
UE配置了 3个载波,工作在 TDD上下行配置 2,釆用基于 DFT-S-OFDM 的 PUCCH新结构传输方式。 基站首先通过 RRC信令给该 UE配置 4个半 静态 ACK/NACK信道资源, DAI状态与信道资源编号的对应关系如表 3 , 则具体的 ACK/NACK信道资源指示过程如下:基站选择编号 1的半静态资 源作为配置给 UE 的信道资源, 将所有包含在反馈窗口内的下行数据包的 DL grant中的 2比特 DAI设置为 "01 " , 并通过承载 DL grant的 PDCCH 动态通知 UE ,如图 10所示; UE根据反馈窗口内任意一个检测到的 DL grant 中的 2比特 D AI信息, 确定其 ACK/NACK信道资源编号 , 并在该信 道资源反馈 ACK/NACK信息。
本领域普通技术人员可以理解实现上述实施例方法携带的全部或部分 步骤是可以通过程序来指令相关的硬件完成, 所述的程序可以存储于一种 计算机可读存储介质中, 该程序在执行时, 包括方法实施例的步骤之一或 其组合。
另外, 在本发明各个实施例中的各功能单元可以集成在一个处理模块 中, 也可以是各个单元单独物理存在, 也可以两个或两个以上单元集成在 一个模块中。 上述集成的模块既可以釆用硬件的形式实现, 也可以釆用软 件功能模块的形式实现。 所述集成的模块如果以软件功能模块的形式实现 并作为独立的产品销售或使用时, 也可以存储在一个计算机可读取存储介 质中。
上述提到的存储介质可以是只读存储器, 磁盘或光盘等。
以上所述以 LTE TDD DL grant中的 2比特 DAI的重用方法为例, 仅 是本发明的优选实施方式, 应当指出, 对于本技术领域的普通技术人员来 说, 在不脱离本发明原理的前提下, 还可以做出若干改进和润饰, 这些改 进和润饰也应视为本发明的保护范围。

Claims

权利要求书
1、 一种反馈信息的信道资源指示方法, 其特征在于, 包括以下步骤: 基站在下行调度信令 DL grant 中给终端用户 UE 发送下行分配索引
DAI比特, 所述 DAI比特至少可以用于指示反馈信息的信道资源;
所述基站通过物理下行控制信道 PDCCH向所述 UE发送 DL grant。
2、 如权利要求 1所述的方法, 其特征在于, 进一步包括:
所述 DAI比特还可以用于指示对应同一个上行子帧进行信息反馈的一 个下行子帧集合中需要反馈信息的 PDCCH的数目。
3、 如权利要求 2所述的方法, 其特征在于, 进一步包括:
若所述 UE被配置多个下行载波, 则所述 DAI比特用于指示反馈信息 的信道资源;
否则, 所述 DAI比特用于指示对应同一个上行子帧进行信息反馈的一 个下行子帧集合中需要反馈信息的 PDCCH的数目。
4、 如权利要求 1所述的方法, 其特征在于, 进一步包括:
所述基站通过高层信令给所述 UE 配置至少一组反馈信息信道资源, 所述至少一组反馈信息信道资源的每组信道资源包括至少一个反馈信息信 道资源。
5、 如权利要求 4所述的方法, 其特征在于, 进一步包括:
所述基站通过 DAI比特向所述 UE指示所述至少一组反馈信息信道资 源中的一组信道资源, 用于传输所述 UE的反馈信息; 或者,
所述基站通过 DAI比特向所述 UE指示所述高层配置的至少一组反馈 信息信道资源以外的反馈信息信道资源;
所述高层配置的至少一组反馈信息信道资源以外的反馈信息信道资源 由所述 UE通过 PDCCH的控制信道元素 CCE的最低序号得到, 或通过激 活半持续调度的 PDCCH的 TPC域指示信息获得。
6、 一种反馈信息的信道资源指示方法, 其特征在于, 包括以下步骤: 终端用户 UE通过物理下行控制信道 PDCCH接收基站发送的下行调度 信令 DL grant;
所述 DL grant包括下行分配索引 DAI比特,所述 DAI比特至少可以用 于指示反馈信息的信道资源。
7、 如权利要求 6所述的方法, 其特征在于, 进一步包括:
所述 DAI比特还可以用于指示对应同一个上行子帧进行信息反馈的一 个下行子帧集合中需要反馈信息的 PDCCH的数目。
8、 如权利要求 7所述的方法, 其特征在于, 进一步包括:
若所述 UE被配置多个下行载波, 则所述 DAI比特用于指示反馈信息 的信道资源;
否则, 所述 DAI比特用于指示对应同一个上行子帧进行信息反馈的一 个下行子帧集合中需要反馈信息的 PDCCH的数目。
9、 如权利要求 6所述的方法, 其特征在于, 进一步包括:
所述 UE接收所述基站的高层信令,所述高层信令给所述 UE配置至少 一组反馈信息信道资源, 所述至少一组反馈信息信道资源的每组信道资源 包括至少一个反馈信息信道资源。
10、 如权利要求 9所述的方法, 其特征在于, 进一步包括:
所述 UE通过所述基站发送的 DAI比特确定所述至少一组反馈信息信 道资源中的一组信道资源, 用于传输所述 UE的反馈信息; 或者,
所述 UE通过所述基站发送的 DAI比特确定所述高层配置的至少一组 反馈信息信道资源以外的反馈信息信道资源;
所述高层配置的至少一组反馈信息信道资源以外的反馈信息信道资源 由所述 UE通过 PDCCH的控制信道元素 CCE的最低序号得到, 或通过激 活半持续调度的 PDCCH的 TPC域指示信息获得。
11、 一种基站, 其特征在于, 包括发送模块以及指示模块,
所述发送模块,用于通过物理下行控制信道 PDCCH向所述 UE发送下 行调度信令 DL grant, 所述 DL grant中包括下行分配索引 DAI比特;
所述指示模块, 至少用于通过所述 DAI比特向所述 UE指示反馈信息 的信道资源。
12、 如权利要求 11所述的基站, 其特征在于, 所述指示模块还用于: 通过所述 DAI比特指示对应同一个上行子帧进行信息反馈的一个下行 子帧集合中需要反馈信息的 PDCCH的数目。
13、 如权利要求 12所述的基站, 其特征在于,
若所述 UE被配置多个下行载波, 则所述指示模块用于通过所述 DAI 比特指示反馈信息的信道资源;
否则, 所述指示模块用于通过所述 DAI比特指示对应同一个上行子帧 进行信息反馈的一个下行子帧集合中需要反馈信息的 PDCCH的数目。
14、 如权利要求 11所述的基站, 其特征在于, 进一步包括配置模块, 所述配置模块通过高层信令给所述 UE 配置至少一组反馈信息信道资 源, 所述至少一组反馈信息信道资源的每组信道资源包括至少一个反馈信 息信道资源。
15、 如权利要求 14所述的基站, 其特征在于, 进一步包括:
所述指示模块通过 DAI比特向所述 UE指示所述至少一组反馈信息信 道资源中的一组信道资源, 用于传输所述 UE的反馈信息; 或者,
所述指示模块通过 DAI比特向所述 UE指示所述高层配置的至少一组 反馈信息信道资源以外的反馈信息信道资源;
所述高层配置的至少一组反馈信息信道资源以外的反馈信息信道资源 由所述 UE通过 PDCCH的控制信道元素 CCE的最低序号得到, 或通过激 活半持续调度的 PDCCH的 TPC域指示信息获得。
16、 一种用户设备 UE, 其特征在于, 包括接收模块以及获取模块, 所述接收模块, 用于通过物理下行控制信道 PDCCH接收基站发送的 下行调度信令 DL grant;
所述获取模块, 用于根据所述 DL grant中包括的下行分配索引 DAI比 特获取指示信息, 所述 DAI比特至少可以用于指示反馈信息的信道资源。
17、 如权利要求 16所述的用户设备 UE, 其特征在于, 所述获取模块 获取的所述 DAI比特还可以用于指示对应同一个上行子帧进行信息反馈的 一个下行子帧集合中需要反馈信息的 PDCCH的数目。
18、 如权利要求 17所述的用户设备 UE, 其特征在于, 进一步包括: 若所述 UE被配置多个下行载波, 则所述获取模块确定所述 DAI比特 用于指示反馈信息的信道资源;
否则, 所述获取模块确定所述 DAI比特用于指示对应同一个上行子帧 进行信息反馈的一个下行子帧集合中需要反馈信息的 PDCCH的数目。
19、 如权利要求 16所述的用户设备 UE, 其特征在于, 进一步包括: 所述接收模块接收所述基站的高层信令, 所述高层信令给所述 UE 配 置至少一组反馈信息信道资源, 所述至少一组反馈信息信道资源的每组信 道资源包括至少一个反馈信息信道资源。
20、 如权利要求 19所述的用户设备 UE, 其特征在于, 进一步包括: 所述获取模块通过所述基站发送的 DAI比特确定所述至少一组反馈信 息信道资源中的一组信道资源, 用于传输所述 UE的反馈信息; 或者, 所述获取模块通过所述基站发送的 DAI比特确定所述高层配置的至少 一组反馈信息信道资源以外的反馈信息信道资源;
所述高层配置的至少一组反馈信息信道资源以外的反馈信息信道资源 由所述 UE通过 PDCCH的控制信道元素 CCE的最低序号得到, 或通过激 活半持续调度的 PDCCH的 TPC域指示信息获得。
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