WO2011020433A1 - Ack/nack资源预留的方法、系统和设备 - Google Patents

Ack/nack资源预留的方法、系统和设备 Download PDF

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Publication number
WO2011020433A1
WO2011020433A1 PCT/CN2010/076101 CN2010076101W WO2011020433A1 WO 2011020433 A1 WO2011020433 A1 WO 2011020433A1 CN 2010076101 W CN2010076101 W CN 2010076101W WO 2011020433 A1 WO2011020433 A1 WO 2011020433A1
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WIPO (PCT)
Prior art keywords
user terminal
channel resource
feedback
channel
ack
Prior art date
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PCT/CN2010/076101
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English (en)
French (fr)
Inventor
刘婷婷
林亚男
沈祖康
Original Assignee
大唐移动通信设备有限公司
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Filing date
Publication date
Application filed by 大唐移动通信设备有限公司 filed Critical 大唐移动通信设备有限公司
Priority to EP10809566.2A priority Critical patent/EP2469921B1/en
Priority to US13/389,801 priority patent/US9621306B2/en
Publication of WO2011020433A1 publication Critical patent/WO2011020433A1/zh

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Classifications

    • 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
    • H04L1/18Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829Arrangements specially adapted for the receiver end
    • H04L1/1861Physical mapping arrangements
    • 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
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/0091Signaling for the administration of the divided path
    • H04L5/0094Indication of how sub-channels of the path are allocated
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/02Arrangements for detecting or preventing errors in the information received by diversity reception
    • H04L1/06Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
    • 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
    • H04L5/001Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
    • 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
    • H04L5/0014Three-dimensional division
    • H04L5/0023Time-frequency-space
    • 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
    • H04L5/0078Timing of allocation
    • H04L5/0082Timing of allocation at predetermined intervals

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method, system, and device for ACK/NACK resource reservation. Background technique
  • LTE Long Term Evolution
  • HARQ Hybrid Automatic Repeat ReQuest
  • the UE User Equipment
  • receives the The downlink data packet is decoded. If the decoding is correct, the ACK is fed back to the base station. If the decoding fails, the NACK is fed back to the base station, and the base station is required to retransmit the data packet.
  • the base station sends an SPS (Sym-Persistent Scheduling) resource release indication to the UE, and notifies the UE to release all resources allocated to the service. After receiving the indication, the UE will feed back the ACK to the base station.
  • SPS Syn-Persistent Scheduling
  • the base station will use multiple downlink carriers in one subframe to transmit data to the UE, and each carrier is an independent HARQ entity, so the UE needs to feed back multiple ACKs in one uplink subframe. /NACK information.
  • LTE Rel-8 (Release 8, Version 8), including: Merging and multiplexing, that is, using one PUCCH (Physical Uplink Control Channel, physical)
  • PUCCH Physical Uplink Control Channel
  • the channel resources of the uplink control channel are fed back with multiple ACK/NACK information.
  • L the number of downlink subframes that need to perform ACK/NACK feedback in the same uplink subframe.
  • L l
  • M the values of M are different, that is, the number of each column K in Table 1.
  • Table 1 Downlink association set index K ⁇ k 0 , k - - k M x ⁇ for TDD
  • L ACK/NACKs belonging to the same user and the same codeword in the feedback window are logically added to obtain 1 or 2 bits (when the downlink double codeword is used), and FIG. 1 respectively represents the single code.
  • the process of combining words and multiple code words it is only necessary to use the PUCCH Format la/lb to feed back 1 or 2 bits of ACK/NACK.
  • the method can also effectively solve the PUCCH coverage problem, and is suitable for a UE located at a relatively edge location of a cell.
  • ACK/NACK corresponding to different codewords belonging to the same user is first logically added; then, according to the state of L composite ACK/NACK, the actual transmission feedback of 2 bits is determined by looking up the table.
  • the feedback channel number used for information and transmission using PUCCH Format lb to transmit the 2-bit feedback information in the selected feedback channel.
  • the feedback information and the feedback channel actually transmitted are directly selected according to the L ACK/NACK feedback conditions. The specific process is shown in Figure 2.
  • the actual feedback information is uniformly defined as 2 bits, so QPSK (Quadature Phase-Shift Keying) modulation and PUCCH Format lb transmission are required.
  • QPSK Quadadature Phase-Shift Keying
  • PUCCH Format lb transmission are required.
  • the method effectively avoids unnecessary retransmission, is applicable to the cell center user, and improves transmission efficiency.
  • the UE uses only one PUCCH channel resource to transmit one ACK/NACK feedback information, and maintains the uplink single carrier characteristic.
  • the uplink channel number available for the ACK/NACK feedback information is based on the first CCE (Control Channel Element) of the PDCCH (Physical Downlink Control Channel) carrying the packet scheduling information.
  • the control channel unit is numbered, that is, an uplink feedback channel resource number can be uniquely determined according to the first CCE of the PDCCH.
  • the merge mode if M is the number of downlink packets actually received, the actually used uplink control channel resources are indicated by the first CCE of the Mth PDCCH in the feedback window; and for the multiplexing mode, the feedback window is
  • Each PDCCH corresponds to an available uplink channel resource number, and then one channel resource is selected from all available channels to transmit actual feedback information according to a specific feedback state.
  • the base station can know the specific time position of each information transmission in advance, and therefore the channels transmitting the above control signaling are all passed by the base station through the RRC. (Radio Resource Control, Radio Resource Control) signaling is pre-assigned to the UE.
  • the LTE-A system is currently determined to support up to 5 carriers for aggregation.
  • the feedback window is defined as multiple downlink carriers and downlink subframes that need to perform ACK/NACK feedback in the same subframe.
  • the size of the feedback window L the number of downlink carriers aggregated by the UE N.
  • the uplink control channel can also use ORTD (Orthogonal Resource Transmit Diversity). Transmit diversity is implemented to improve the reliability or capacity of uplink control signaling transmission.
  • ORTD Orthogonal Resource Transmit Diversity
  • the so-called ORTD that is, each antenna port corresponds to one PUCCH resource number, and the same information is spread by orthogonal sequences selected by resource numbers on different antenna ports, and then transmitted through the corresponding antenna ports at the same time.
  • the receiving end separates the signals from the different antenna ports and performs combined detection to obtain the diversity gain.
  • Figure 3 is a schematic diagram of the use of ORTD for transmit diversity when two antenna ports are used.
  • s is the ACK/NACK information of the feedback
  • ⁇ and n 2 represent the two antenna ports respectively
  • the two different uplink control channel resource numbers correspond to different orthogonal spreading sequences.
  • a problem in the prior art is that, in a long term evolution system, a UE may transmit ACK/NACK information in a multiplexing and combining mode by using transmit diversity. In this case, multiple uplink control resource numbers are required, and currently In the case of the uplink control channel resource reservation method and the indication method of the uplink control resource number, there is no feasible implementation. Summary of the invention
  • the embodiments of the present invention provide a method, system, and device for ACK/NACK resource reservation, which are used to implement reservation of uplink control channel resources.
  • An embodiment of the present invention provides a method for ACK/NACK resource reservation, including: when the user terminal uses two antenna ports to perform ACK/NACK feed by using transmit diversity, two uplink control channel resources are used, and each Each channel resource corresponds to a number, and each antenna port corresponds to one channel resource.
  • the indication manner of the available channel resource number corresponding to the first antenna port is specifically: for the dynamically scheduled downlink data packet, the physical downlink control corresponding to each of the downlink data packets is used.
  • the first control channel unit CCE number occupied by the channel PDCCH is bound; for the continuously scheduled downlink data packet, the available channel resource number is pre-assigned to the user terminal by the base station through radio resource control RRC signaling.
  • the base station configures an uplink control channel resource that is available when the user terminal performs ACK/NACK feeding by using the transmit diversity, and includes:
  • the base station defines that the CCEs of all the PDCCHs of the user terminal in the feedback window are at least 2, and the two channel resource numbers corresponding to the two CCEs pre-defined by each PDCCH form a resource number group;
  • the method further includes:
  • the user terminal detects the PDCCH, and obtains all available channel resource groups according to the indication of two CCEs pre-agreed by each PDCCH;
  • the user terminal receives the PDSCH, and obtains L ACK/NACK information after decoding, where L is a feedback window length;
  • the user terminal acquires feedback information actually transmitted according to the state of the L ACK/NACK, and selects one of the available channel resource groups as the channel resource group used for the actual transmission, and obtains the channel component.
  • the two channel resource numbers of the resource group correspond to two antenna ports respectively;
  • the user terminal simultaneously transmits the actual feedback information through two antenna ports on two channel resources of the acquired channel resource group.
  • the acquiring, by the base station, the ACK/NACK fed back by the user equipment in the configured channel resource includes:
  • the base station separately combines signals on two physical uplink control channels PUCCH in the same channel resource group, and then detects all available channel resource groups to obtain a channel resource group in which data transmission exists;
  • the base station detects signals transmitted in the channel resource group, and obtains specific actual feedback information
  • the base station obtains an ACK/NACK feedback from the user terminal according to the detected actual feedback information and the number of the channel resource group.
  • the base station configures an uplink control channel resource that is available when the user terminal performs ACK/NACK feeding by using the transmit diversity, and includes:
  • the base station defines that the CCE aggregation level of at least one PDCCH in the feedback window is greater than or equal to two.
  • the method further includes:
  • the user terminal detects the PDCCH, acquires channel resources available to all the first antenna ports according to the indication of the first CCE of each PDCCH, and determines a second CCE corresponding to the PDCCH of the CCE whose aggregation level is greater than or equal to 2.
  • the channel is the channel resource used by the second antenna port;
  • the user terminal receives the PDSCH, and obtains L ACK/NACK information after decoding, where L is a feedback window length;
  • the user terminal acquires the actually transmitted feedback information according to the state of the L ACK/NACK, and selects one of all available channel resources corresponding to the first antenna port as the first antenna port for actual transmission.
  • the user terminal simultaneously transmits the actual feedback information through two antenna ports on channel resources corresponding to the two antenna ports.
  • the acquiring, by the base station, the ACK/NACK fed back by the user equipment in the configured channel resource includes:
  • the base station detects the channel resource used by the first antenna port, and determines the channel resource in which the data transmission exists. Before the detection, all the CCEs in the window are aggregated into the channel corresponding to the second CCE in the PDCCH of level ⁇ 2. The signal on the signal is combined with the signal in the channel corresponding to the first CCE in all PDCCHs;
  • the base station detects a signal transmitted in a channel resource in which data transmission exists, and obtains specific actual feedback information
  • the base station acquires an ACK/NACK feedback from the user terminal according to the detected actual feedback information and the channel resource number.
  • the base station configures an uplink control channel resource that is available when the user terminal performs ACK/NACK feeding by using the transmit diversity, and includes:
  • the base station configures one channel resource as the channel resource used by the second antenna port by using the high layer signaling; the channel resource may be shared by multiple user terminals in the cell, and the base station needs to be configured to limit sharing of the same channel resource.
  • the user terminal performs uplink feedback in a time-sharing manner.
  • the method further includes:
  • the user terminal acquires, by using the received high layer signaling, a channel resource number of a channel resource used by the second antenna port;
  • the user terminal detects the PDCCH, and obtains channel resources available to all the first antenna ports according to the indication of the first CCE of each PDCCH;
  • the user terminal receives the PDSCH, and obtains L ACK/NACK information after decoding, where L is a feedback window length;
  • the user terminal acquires actual transmission feedback information according to the state of the L ACK/NACK, and selects one of all available channel resources corresponding to the first antenna port as the first antenna port for actual transmission.
  • Channel resource
  • the user terminal simultaneously transmits the actual feedback information through two antenna ports on channel resources corresponding to the two antenna ports.
  • the acquiring, by the base station, the ACK/NACK fed back by the user equipment in the configured channel resource includes:
  • the base station detects the channel resource used by the first antenna port to determine the channel resource in which the data transmission exists; before the detecting, the pre-configured signal on the channel resource of the second antenna port and all PDCCHs The signals in the channel corresponding to the first CCE are merged;
  • the base station detects signals transmitted in the determined channel resources, and obtains specific actual feedback information.
  • the base station acquires an ACK/NACK feedback from the user terminal according to the detected actual feedback information and the channel resource number.
  • the base station configures an uplink control channel resource that is available when the user terminal performs ACK/NACK feeding by using the transmit diversity, and includes:
  • the base station defines that all PDCCHs in the feedback window have a CCE aggregation level of at least 2. After the base station notifies the user terminal of all the available uplink control channel resources, the method further includes:
  • the user terminal detects the PDCCH, and learns all available channel resource numbers according to the indications of the first and second CCEs in each PDCCH; and selects the first and second CCEs in one PDCCH according to a predetermined agreement.
  • the corresponding channel resource number is used as a channel resource used by the first and second antenna ports;
  • the user terminal receives the PDSCH, and obtains M' ACK/NACK information after decoding.
  • M and ACK/NACK belonging to the same user and the same codeword are logically added to obtain 1 or 2 bits of feedback information; wherein M' is the number of downlink data packets received by the user terminal;
  • the user terminal simultaneously transmits the feedback information on channel resources corresponding to the two antenna ports to implement transmit diversity.
  • the base station acquires feedback from the user terminal in the configured channel resource.
  • ACK/NACK including:
  • the base station detects all available channel resources in the feedback window, and determines that there is a channel resource for data transmission; before the detection, the signal in the channel corresponding to the second CCE in all PDCCHs in the feedback window and all PDCCHs in the feedback window The signals in the channel corresponding to the first CCE are merged;
  • the base station detects the signal transmitted on the detected channel, and obtains specific feedback information.
  • the base station configures an uplink control channel resource that is available when the user terminal performs ACK/NACK feeding by using the transmit diversity, and includes:
  • the base station defines at least two available CCEs in the feedback window, each of which is bound to an available uplink control channel resource.
  • the feedback window length is 1, the CCE of the unique PDCCH in the limited feedback window has an aggregation level of at least 2.
  • the method further includes:
  • the user terminal detects the PDCCH.
  • the feedback window length is greater than 1, according to the indication of the first CCE in each PDCCH, all available channel resource numbers in the feedback window are obtained, and two of them are selected according to a prior agreement.
  • the channel resources used are transmitted on the two antenna ports; when the feedback window length is 1, the user terminal acquires two channel resources according to the indications of the first and second CCEs in the unique PDCCH in the feedback window.
  • the user terminal receives the PDSCH, and obtains M' ACK/NACK information after decoding.
  • M and ACK/NACK belonging to the same user and the same codeword are logically added to obtain 1 or 2 bits of feedback information; wherein M ' is the number of downlink data packets received by the user terminal;
  • the user terminal simultaneously transmits feedback information on channel resources corresponding to the two antenna ports to implement transmit diversity.
  • the base station acquires feedback from the user terminal in the configured channel resource.
  • ACK/NACK including:
  • the base station detects all available channel resources in the window to determine that there is a channel resource for data transmission; if no signal is detected, it determines that the packet is lost;
  • the base station detects a signal transmitted on the determined channel resource, and acquires an ACK/NACK that is fed back by the user terminal.
  • the base station configures an uplink control channel resource that is available when the user terminal performs ACK/NACK feeding by using the transmit diversity, and includes:
  • the base station configures one channel resource as a channel resource used by the second antenna port through high layer signaling.
  • the channel resource may be shared by multiple user terminals in the cell, and the base station needs to be configured to limit the user terminal sharing the same channel resource to perform uplink feedback in a time-sharing manner.
  • the method further includes:
  • the user terminal learns a channel resource number for the second antenna port according to the received high layer signaling
  • the user terminal detects the PDCCH, and according to the indication of the first CCE in each PDCCH, learns all available channel resource numbers corresponding to the first antenna port, and selects a channel used as the first antenna port according to a predetermined agreement.
  • the user terminal receives the PDSCH, and obtains M′ ACK/NACK information after decoding; logically adds M and ACK/NACKs belonging to the same user and the same codeword to obtain 1 or 2 bits of feedback information; where M′ is The number of downlink data packets received by the user terminal;
  • the user terminal simultaneously transmits actual feedback information on channel resources corresponding to the two antenna ports to implement transmit diversity.
  • the acquiring, by the base station, the ACK/NACK fed back by the user equipment in the configured channel resource includes:
  • the base station detects all available channel resources in the window, and determines that there is a channel resource for data transmission; before the detecting, the signal on the channel pre-configured to the second antenna port of the user terminal and all PDCCHs may be first
  • the signals in the channel corresponding to the first CCE are merged;
  • the base station detects the signal transmitted on the detected channel, and learns the ACK/NACK that the user terminal feeds back:.
  • An embodiment of the present invention further provides a system for implementing ACK/NACK resource reservation, including: a base station, configured to configure, and notify the uplink control channel resource that is available when a user terminal performs ACK/NACK feed by using transmit diversity. Obtaining, by the user terminal, the ACK/NACK fed back by the user terminal in the configured channel resource group;
  • the user terminal is configured to use the channel resource indicated by the base station to transmit the feedback information of the AC ACK by means of ACK/NACK multiplexing combined with transmit diversity, or ACK/NACK combining combined with transmit diversity.
  • An embodiment of the present invention further provides a base station, including:
  • a configuration unit configured to configure an uplink control channel resource that is available when the user terminal performs ACK/NACK feeding by using the transmit diversity, and notify the user terminal;
  • a feedback obtaining unit configured to acquire, in the channel resource configured by the configuration unit, an ACK/NACK that is fed back by the user terminal:
  • the configuration unit is specifically configured to: when the user terminal uses two antenna ports to perform ACK/NACK feeding by using transmit diversity, two uplink control channel resources are required, and each channel resource corresponds to one number, and each antenna The port corresponds to a channel resource.
  • the indication manner of the available channel resource number corresponding to the first antenna port is specifically: for the dynamically scheduled downlink data packet, the physical downlink control corresponding to each of the downlink data packets is used.
  • the CCE number of the first control channel unit occupied by the channel PDCCH is bound, that is, each downlink data packet in the feedback window corresponds to an available uplink control channel resource; for the continuously scheduled downlink data packet, the available channel resource The number is pre-assigned to the user terminal by the base station through radio resource control RRC signaling.
  • the configuration unit is further configured to: limit a aggregation level of a control channel unit CCE of all PDCCHs of the user terminal in the feedback window to at least 2, and form two resources by two channel resource numbers corresponding to two CCEs of each PDCCH. Number group
  • the feedback acquiring unit is specifically configured to: separately combine signals on two PUCCHs in the same channel resource group, and then perform detection on all available channel resource groups to obtain a channel resource group in which data transmission exists; Signals transmitted within the group are checked The ACK/NACK feedback from the user terminal is obtained according to the actual feedback information and the number of the channel resource group.
  • the configuration unit is further configured to: limit a CCE aggregation level of at least one PDCCH in the feedback window to be greater than or equal to 2;
  • the feedback acquiring unit is specifically configured to: detect a channel resource used by the first antenna port, and determine a channel resource in which the data transmission exists; before the detecting, the second PDCCH in the CCE aggregation level ⁇ 2 in the window
  • the signals on the channel corresponding to the CCE are combined with the signals in the channel corresponding to the first CCE in all PDCCHs; the signals transmitted in the channel resources in which the data transmission exists are detected, and the specific actual feedback information is obtained; Acquiring the actual feedback information and the channel resource number, and obtaining the ACK/NACK 0 fed back by the user terminal
  • the configuration unit is further configured to: configure one channel resource as a channel resource used by the second antenna port by using the high layer signaling; the channel resource may be shared by multiple user terminals in the cell, and the configuration unit needs to pass Configure the user terminal that shares the same channel resource to perform uplink feedback in a time-sharing manner;
  • the feedback acquiring unit is specifically configured to: detect a channel resource used by the first antenna port, and determine a channel resource in which the data transmission exists; before the detecting, configure a channel resource of the second antenna port that is pre-configured
  • the signal on the channel is combined with the signal in the channel corresponding to the first CCE in all PDCCHs; the signal transmitted in the determined channel resource is detected, and specific actual feedback information is obtained.
  • the configuration unit is further configured to: limit a CCE aggregation level of all PDCCHs in the feedback window to at least 2;
  • the feedback acquiring unit is specifically configured to: detect all available channel resources in the feedback window, and determine a channel resource in which the data transmission exists; before the detecting, the feedback in the channel corresponding to the second CCE in all PDCCHs in the feedback window The signal is combined with the signal in the channel corresponding to the first CCE in all PDCCHs; the signal transmitted on the detected channel is detected, and the ACK/NACK fed back by the user terminal is obtained.
  • the configuration unit is further configured to: at least two available in the limited feedback window
  • the CCE of the unique PDCCH in the limited feedback window has an aggregation level of at least 2;
  • the feedback acquiring unit is specifically configured to: detect all available channel resources in the window, determine that there is a channel resource for data transmission; if no signal is detected, determine a packet loss; and transmit the signal on the determined channel resource. Performing a test to obtain an AC ACK: feedback from the user terminal.
  • the configuration unit is further configured to: configure one channel resource as a channel resource used by the second antenna port by using the high layer signaling; the channel resource may be shared by multiple user terminals in the cell, and the configuration unit needs to pass Configure the user terminal that shares the same channel resource to perform uplink feedback in a time-sharing manner;
  • the feedback obtaining unit is specifically configured to: detect all available channel resources in the window, and determine a channel resource in which the data transmission exists; before the detecting, first configure a channel pre-configured to the second antenna port of the user terminal.
  • the signal on the channel is combined with the signal in the channel corresponding to the first CCE in all PDCCHs; the signal transmitted on the detected channel is detected, and the ACK/NACK feedback from the user terminal is learned.
  • An embodiment of the present invention further provides a user terminal, including:
  • a resource acquiring unit configured to acquire a channel resource configured by the base station for performing ACK/NACK feeding; and determine two channel resources used for actual transmission of the two antenna ports.
  • a feedback unit configured to use the channel resource used by the two actual transmissions acquired by the resource acquiring unit, and transmit ACK/NACK feedback by using ACK/NACK multiplexing combined with transmit diversity, or ACK/NACK combining combined with transmit diversity. information.
  • the resource acquiring unit is specifically configured to: detect a PDCCH, acquire all available channel resource groups according to an indication of two CCEs that are pre-defined by each PDCCH; receive the PDSCH, and obtain L ACK/NACK information after decoding, where L is the feedback window length; according to the state of the L ACK/NACK, the actual transmitted feedback information is obtained, and one of the available channel resource groups is selected as the channel resource group used for the actual transmission, and the composition is obtained.
  • the two channel resource numbers of the channel resource group correspond to two antenna ports respectively;
  • the feedback unit is specifically configured to transmit the actual feedback information through two antenna ports on two channel resources of the channel resource group acquired by the resource acquiring unit.
  • the resource acquiring unit is specifically configured to: detect a PDCCH, acquire channel resources available to all first antenna ports according to an indication of a first CCE of each PDCCH, and determine that an aggregation level of a CCE is greater than or equal to two.
  • the channel corresponding to the second CCE of the PDCCH is the channel resource used by the second antenna port; receiving the PDSCH, and decoding obtains L ACK/NACK information, where L is the feedback window length; according to the L ACK/NACK The state of the composition, obtaining the feedback information of the actual transmission; and selecting one of all available channel resources corresponding to the first antenna port as the channel resource used for the actual transmission of the first antenna port;
  • the feedback unit is specifically configured to transmit the actual feedback information through two antenna ports on the channel resources corresponding to the two antenna ports acquired by the resource acquiring unit.
  • the resource acquiring unit is specifically configured to: obtain, by using the received high layer signaling, a channel resource number of a channel resource used by the second antenna port; and detect a PDCCH according to an indication of a first CCE of each PDCCH, Obtaining the channel resources used by all the first antenna ports; receiving the PDSCH, and decoding to obtain L ACK/NACK information, where L is the feedback window length; and obtaining the actual transmission according to the state of the L ACK/NACKs Feedback information, and select one of all available channel resources corresponding to the first antenna port as the channel resource used for the actual transmission of the first antenna port;
  • the feedback unit is specifically configured to transmit the actual feedback information through two antenna ports on the channel resources corresponding to the two antenna ports acquired by the resource acquiring unit.
  • the resource acquiring unit is specifically configured to: detect a PDCCH, and learn, according to an indication of a first and a second CCE in each PDCCH, all available channel resource numbers; and select a first PDCCH according to a predetermined agreement.
  • the channel resource number corresponding to the second CCE is used as the channel resource used by the first and second antenna ports; the PDSCH is received, and the M' ACK/NACK information is obtained after decoding.
  • the M' ACK/NACKs belonging to the same user and the same codeword are logically added to obtain 1 or 2 bits of feedback information, where M is the number of downlink data packets received by the user terminal;
  • the feedback unit is configured to transmit the feedback information on the channel resources corresponding to the two antenna ports acquired by the resource acquiring unit to implement the transmit diversity.
  • the resource acquiring unit is specifically configured to: when the user terminal does not receive any CCE or only receives one CCE, does not send any feedback information or fall back to the single antenna mode for transmission; when the user terminal receives When two or more CCEs are used: PDCCH is detected.
  • PDCCH When the feedback window length is greater than 1, all available channel resource numbers in the feedback window are obtained according to the indication of the first CCE in each PDCCH, and according to a prior agreement Selecting two of them as the channel resources used for transmission on the two antenna ports; when the feedback window length is 1, the user terminal will according to the indication of the first and second CCEs in the unique PDCCH in the feedback window.
  • M and ACK/NACK belonging to the same user and the same codeword are logically added to obtain 1 or 2 bits of feedback information; wherein M' is the number of downlink data packets received by the user terminal;
  • the feedback unit is configured to transmit the feedback information on the channel resources corresponding to the two antenna ports acquired by the resource acquiring unit to implement the transmit diversity.
  • the resource acquiring unit is specifically configured to: learn, according to the received high layer signaling, a channel resource number used for the second antenna port; detect the PDCCH, and learn the first according to the indication of the first CCE in each PDCCH. All available channel resource numbers corresponding to the antenna ports, and select one channel resource used as the first antenna port according to the prior agreement; receive the PDSCH, and obtain M' ACK/NACK information after decoding; M and ACK/NACK of the same codeword are logically added to obtain 1 or 2 bits of feedback information; where M is the number of downlink data packets received by the user terminal;
  • the feedback unit is configured to transmit the feedback information on the channel resources corresponding to the two antenna ports acquired by the resource acquiring unit to implement the transmit diversity.
  • the reservation of the channel resources used by the multiple ACK/NACK feeds is implemented, and the method for resource reservation supports the transmit diversity, which improves the reliability of the uplink control channel transmission; and the method is simple and easy to implement.
  • FIG. 1 is a schematic diagram of ACK/NACK combining in the prior art
  • FIG. 2 is a schematic diagram of ACK/NACK multiplexing in the prior art
  • FIG. 3 is a schematic diagram of transmission diversity of two antenna ports in the prior art
  • FIG. 4 is a flowchart of a method for ACK/NACK resource reservation provided in an embodiment of the present invention
  • FIG. 5 is a schematic diagram of a CCE of a PDCCH of a feedback window in an ACK/NACK multiplexing feedback manner used in an embodiment of the present invention
  • FIG. 6 is a schematic diagram of a CCE of a PDCCH of a feedback window in an ACK/NACK multiplexing feedback manner according to an embodiment of the present invention
  • FIG. 7 is a schematic diagram of a CCE of a PDCCH of a feedback window in an ACK/NACK combined feedback manner according to an embodiment of the present invention
  • FIG. 8 is a schematic diagram of a CCE of a PDCCH of a feedback window in an ACK/NACK combined feedback manner according to an embodiment of the present invention
  • FIG. 9 is a schematic structural diagram of a base station provided in an embodiment of the present invention.
  • FIG. 10 is a schematic structural diagram of a user terminal provided in an embodiment of the present invention.
  • a method for ACK/NACK resource reservation is provided in the embodiment of the present invention. As shown in FIG. 4, the method includes:
  • Step s401 The base station configures, and notifies the user terminal, the uplink control channel resource that is available when the user terminal performs ACK/NACK feeding by using the transmit diversity.
  • Step s402 The base station acquires ACK/NACK 0 fed back by the user terminal in the configured uplink control channel resource.
  • the ACK/NACK multiplexing and ACK/NACK combined feedback modes are combined with the transmit diversity to improve the reliability and coverage of the transmission. If the UE is configured to transmit the PUCCH using the diversity mode, at least two PUCCH channel resource numbers are required.
  • the ORTD of the two antenna ports is taken as an example to discuss the channel resource indication and reservation methods of the multiplexing and combining modes, respectively.
  • the available channel resource number corresponding to one antenna port can still reuse the indication mode of Rel-8, that is, for the dynamically scheduled downlink data packet, the available uplink is available.
  • the channel resource number is bound to the first CCE number occupied by the corresponding PDCCH.
  • Each downlink data packet in a feedback window corresponds to an available uplink control channel resource.
  • the available upper control channel is pre-assigned to the UE by the base station through RRC signaling.
  • the second channel resource number is still bound to the CCE number of the corresponding PDCCH. At this point, since the first CCE has been bound to the first channel resource number, then another
  • the CCE indicates this PUCCH channel resource number for the second antenna port.
  • the two channel resource numbers corresponding to the two CCEs that are pre-defined by each PDCCH form a resource number group.
  • the channel resource numbers corresponding to the first and second CCEs of each PDCCH form a resource number. Group), as shown in Figure 5.
  • the ACK/NACK multiplex transmission can be performed along the method defined by Rel-8.
  • L be the length of the feedback window
  • the UE selects one group in the L channel resource groups according to the Rel-8 lookup table method, and uses one channel in each of the resource groups of the two antenna ports for transmitting diversity.
  • the resource sends actual feedback information.
  • the UE side processing flow includes:
  • Step 1 Detect the PDCCH and learn all available channel resource groups.
  • Step 2 Receive the PDSCH, and obtain L ACK/NACK information after decoding, where L is the length of the feedback window.
  • Step 3 The UE determines the actual feedback information actually transmitted and the number of the specific feedback channel group used for transmission according to the state of the L ACK/NACK.
  • the user terminal acquires actual transmission feedback information according to the state of the L ACK/NACK, and selects one of the available channel resource groups as the channel resource group used for the actual transmission, and obtains two channel groups that constitute the channel resource group.
  • the channel resource numbers correspond to two antenna ports.
  • Step 4 The UE simultaneously transmits the actual feedback information through two antenna ports on two channel resources of the acquired channel resource group.
  • the base station receiving process includes:
  • Step 1 Check all available channel resource groups to determine which channel resource group has data transmission, and then obtain the selected channel resource group number. Before performing the detection, the signals on the two PUCCHs in the same resource group may be combined first.
  • Step 2 Detecting signals transmitted in the selected channel resource group, and obtaining specific actual feedback information.
  • Step 3 According to the detected actual feedback information and the channel resource group number, look up the table to know the specific status of the L ACK/NACK.
  • the base station limits the CCE aggregation level 2 of at least one PDCCH in the feedback window by scheduling.
  • the UE performs channel selection in the channel resources corresponding to the first CCE of all PDCCHs in the feedback window, determines channel resources used by the first antenna port, and information to be fed back, and determines a certain PDCCH (
  • the PDCCH of the first CCE aggregation level 2 in the window may be preferably selected.
  • the channel corresponding to the second CCE is the channel resource used by the second antenna port.
  • the first PDCCH with a CCE aggregation level greater than or equal to 2 is PDCCH 2, and the channel resource used by the first antenna port is used.
  • the source number is selected in to; the channel resource number used by the second antenna port is
  • the UE automatically uses the resource number corresponding to the second CCE in the PDCCH of the second CCE aggregation level 2 (for example, the CCE2 of the PDCCH 3 selected in FIG. 5 is used.
  • the UE rolls back to the single-antenna transmission mode, and only uses the resource number corresponding to the first antenna port selected by the channel selection to send actual feedback information on one antenna port.
  • the method saves the PUCCH resource reservation to the greatest extent, and has a small CCE aggregation level restriction on the PDCCH.
  • the base station side processing flow includes:
  • the base station does not need to perform other scheduling restrictions; if the PDCCH detection reliability is determined within the feedback window, the same UE If the CCE aggregation level of the PDCCH is not greater than 1, the base station needs to limit the CCE aggregation level of one of the PDCCHs to 2 by scheduling.
  • FIG. 6 is an example.
  • the CCE aggregation levels of PDCCH 2 and PDCCH 3 in the feedback window are both equal to two, and two CCEs are respectively bound to two resource numbers; the CCE aggregation levels of other PDCCHs are all 1, and each PDCCH is The first CCE is bound to an available uplink control resource number.
  • the UE side processing flow includes:
  • Step 1 Detect the PDCCH, and obtain channel resources available to all the first antenna ports according to the indication of the first CCE of each PDCCH. And determining that the channel corresponding to the second CCE of the PDCCH whose aggregation level is greater than or equal to 2 is the channel resource used by the second antenna port.
  • the channel resource corresponding to the second CCE in the PDCCH of the first CCE aggregation level 2 received by the UE is used as the resource used by the second antenna port.
  • Step 2 Receive the PDSCH, and obtain L ACK/NACK information after decoding, where L is the length of the feedback window.
  • Step 3 The UE determines the actual transmission feedback information according to the state of the L ACK/NACK, and selects one of all available channel resources corresponding to the first antenna port as the first antenna port for actual transmission.
  • Channel resource
  • Step 4 The UE simultaneously transmits actual feedback information through the two antenna ports on the channel resources corresponding to the two antenna ports.
  • the base station receiving process includes:
  • Step 1 The channel resource used by the first antenna port is detected to determine which channel resource has data transmission, and the selected channel resource number is obtained.
  • the signals on the channel corresponding to the second CCE in the PDCCH of all CCE aggregation level 2 in the window may be combined with the signals in the channel corresponding to the first CCE in all PDCCHs.
  • Step 2 Detecting the signal transmitted in the selected channel resource, and obtaining specific actual feedback information.
  • Step 3 According to the detected actual feedback information and the channel resource number, look up the table to know the specific status of the L ACK/NACK.
  • Method 2 The second channel resource is fixedly allocated by the network side:
  • the base station side processing flow includes:
  • the base station When the base station is configured for the ACK/NACK multiplexing + transmit diversity mode, the base station will fixedly configure an available uplink control channel corresponding to the second antenna end through the high layer signaling. mouth.
  • the uplink control channel can be shared by multiple users, and the base station needs to schedule, and limit user terminals sharing the same channel resource to perform uplink feedback in a time-sharing manner.
  • the UE side processing flow includes:
  • Step 1 According to the RRC signaling, the channel number for the second antenna port is known.
  • Step 2 Detect the PDCCH, and obtain the channel resources available to all the first antenna ports according to the indication of the first CCE of each PDCCH.
  • Step 3 Receive the PDSCH, and obtain L ACK/NACK information after decoding, where L is the feedback window length.
  • Step 4 According to the state of the L ACK/NACKs, check the table to determine the actual transmission feedback information, and select one of all available channel resources corresponding to the first antenna port as the first antenna port for actual transmission. Channel resources.
  • Step 5 Simultaneously transmit actual feedback information through two antenna ports on the channel resources corresponding to the two antenna ports to implement transmit diversity.
  • the base station receiving process includes:
  • Step 1 The channel resource used by the first antenna port is detected to determine which channel resource has data transmission, and the selected channel resource number is obtained.
  • the signal on the channel resource pre-configured to the second antenna port of the UE may be combined with the signal in the channel corresponding to the first CCE in all PDCCHs.
  • Step 2 Detecting the signal transmitted in the selected channel resource, and obtaining specific actual feedback information.
  • Step 3 According to the detected actual feedback information and the channel resource number, the table looks for the specific status of the L ACK/NACKs.
  • one of the uplink control channel resources corresponding to the two antenna ports can still reuse the indication mode of the Rel-8 in the merge mode, that is, the dynamic scheduling, the M'th PDCCH in the feedback window A CCE indication; during persistent scheduling, the base station pre-allocates to the UE through RRC signaling.
  • the following two indication methods are also provided in the embodiment of the present invention: method 1 :
  • the second channel resource number is still bound to the CCE number of the PDCCH, and can also be divided into two indication methods:
  • the CCE aggregation level of all PDCCHs of the UE in the feedback window is not less than 2 by the base station; this ensures that each PDCCH in the feedback window corresponds to at least two uplink control channel resources.
  • the UE side processing flow includes:
  • Step 1 Detect the PDCCH, and obtain all available channel resource numbers according to the indications of the first and second CCEs in each PDCCH.
  • the channel resource number corresponding to the first and second CCEs in one PDCCH is selected as the channel resource used by the first and second antenna ports; and the Mth PDCCH (ie, UE) is preferably selected.
  • the channel resource number corresponding to the first and second CCEs on the PDCCH corresponding to the last received downlink data packet is used as the channel resource used by the first and second antenna ports.
  • Step 2 Receive the PDSCH, and obtain M, ACK/NACK information after decoding. M and ACK/NACK belonging to the same user and the same codeword are logically added to obtain 1 or 2 bits (when the double codeword is downloaded).
  • Step 3 The UE simultaneously transmits feedback information on the channel resources corresponding to the two antenna ports to implement transmit diversity, as shown in FIG. 7 .
  • the base station receiving process includes:
  • Step 1 Detect all available channel resources in the window to determine which channel resource has data transmission.
  • the signals in the channel corresponding to the second CCE in all PDCCHs in the window may be merged with the signals in the channel corresponding to the first CCE in all PDCCHs.
  • Step 2 detecting the signal transmitted on the detected channel, and obtaining specific feedback information.
  • Instruction Method 2 There are at least two available CCEs in the base station limited feedback window, each bound to one uplink control channel resource.
  • Case 2 L> 1 : The base station has no restriction on the CCE aggregation level of the PDCCH in the feedback window, because there must be at least two available CCEs in the feedback window.
  • Case 1 The UE does not receive any CCE or only receives one CCE. At this time, the UE can determine that there is a loss of downlink data, and may not send any feedback information (ie, DTX status) or fall back to single antenna mode for transmission.
  • DTX status any feedback information
  • Case 2 The UE receives two or more CCEs.
  • the UE specific processing flow includes:
  • Step 1 The UE detects the PDCCH.
  • the UE obtains all available channel resource numbers in the feedback window according to the indication of the first CCE in each PDCCH, and selects two of them according to a predetermined agreement.
  • the channel resources used are transmitted on the two antenna ports.
  • the number corresponding to the first CCE of the Mth PDCCH and the number corresponding to one CCE adjacent thereto can be optimally selected, as shown in FIG. 8;
  • the UE acquires two channel resources according to the indications of the first and second CCEs in the unique PDCCH in the feedback window, and uses the channel resources used for transmission on the two antenna ports.
  • Step 2 Receive the PDSCH, and obtain M' ACK/NACK information after decoding.
  • the M' ACK/NACKs belonging to the same user and the same codeword are logically added to obtain 1 or 2 bits (when the downlink double codeword is used).
  • Step 3 The UE simultaneously transmits feedback information on the channel resources corresponding to the two antenna ports to implement transmit diversity.
  • the base station receiving process includes:
  • Step 1 Detect all available channel resources in the window to determine which channel resource has data transmission. If no signal is detected, that is, DTX, the packet loss is judged.
  • Step 2 detecting the signal transmitted on the detected channel, and obtaining specific feedback information.
  • Method 2 The second channel resource is fixedly allocated by the network side:
  • the processing of the base station includes: When the base station is configured to perform the "ACK/NACK merge + transmit diversity" mode for the UE, the base station will fixedly configure an available uplink control channel through the high layer signaling, corresponding to the second antenna port.
  • the uplink control channel can be shared by multiple users, and the base station needs to schedule, and limit user terminals sharing the same channel resource to perform uplink feedback in a time-sharing manner.
  • the UE side processing flow includes:
  • Step 1 According to the RRC signaling, the channel number for the second antenna port is known.
  • the PDCCH is detected, and according to the indication of the first CCE in each PDCCH, all available channel resource numbers corresponding to the first antenna port are obtained, and a channel resource used as the first antenna port is selected according to a predetermined agreement.
  • the channel resource number corresponding to the first CCE on the Mth PDCCH may be selected.
  • Step 3 Receive the PDSCH, and obtain M' ACK/NACK information after decoding.
  • the M' ACK/NACKs belonging to the same user and the same codeword are logically added to obtain 1 or 2 bits (when the downlink double codeword is used).
  • Step 4 Simultaneously transmit actual feedback information on channel resources corresponding to the two antenna ports to implement transmit diversity.
  • the base station receiving process includes:
  • Step 1 Detect all available channel resources in the window to determine which channel resource has data transmission.
  • the signal on the channel pre-configured to the second antenna port of the UE may be combined with the signal in the channel corresponding to the first CCE in all PDCCHs.
  • Step 2 Detecting the signal transmitted on the detected channel, and obtaining specific feedback information.
  • An embodiment of the present invention further provides a system for implementing ACK/NACK resource reservation, including: a base station, configured, and notifying the user terminal, an uplink control channel resource that is available when a user terminal performs ACK/NACK feed by using transmit diversity; Obtaining an ACK/NACK fed back by the user terminal in the configured channel resource group;
  • a user terminal configured to use the channel resource used by the base station to perform ACK/NACK feed, and transmit ACK/NACK feedback by using ACK/NACK multiplexing combined with transmit diversity, or ACK/NACK combining combined with transmit diversity. information.
  • the schematic diagram of the structure of the base station in the embodiment of the present invention is as shown in FIG. 9 , and includes: a configuration unit 10 configured to configure, by using a channel resource that is available when the user terminal performs ACK/NACK feeding by using the transmit diversity, and notify the User terminal
  • the feedback obtaining unit 20 is configured to acquire an ACK/NACK that is fed back by the user terminal in a channel resource configured by the configuration unit.
  • the configuration unit 10 is specifically configured to use the two uplink control channel resources when the user terminal uses two antenna ports to perform ACK/NACK feed by using transmit diversity, and each channel resource corresponds to one number, and each antenna port corresponds to one.
  • the channel resource wherein the indication manner of the available channel resource number corresponding to the first antenna port is specifically: for the dynamically scheduled downlink data packet, each of the available channel resource numbers corresponds to each of the downlink data packets.
  • the first CCE number of the physical downlink control channel PDCCH is bound, that is, each downlink data packet in the feedback window corresponds to an available uplink control channel resource; for the continuously scheduled downlink data packet, the available channel resource number is determined by The base station is pre-assigned to the user terminal through RRC signaling.
  • the configuration unit 10 is specifically configured to: limit the aggregation level of the control channel unit CCE of all PDCCHs of the user terminal in the feedback window to at least 2, and form two resource numbers corresponding to two CCEs pre-agreed by each PDCCH to form a resource number. Group (considering CCE aggregation, etc. Preferably, the channel resource numbers corresponding to the first and second CCEs of each PDCCH form a resource number group);
  • the feedback obtaining unit 20 is specifically configured to: separately combine signals on two PUCCHs in the same channel resource group, and then detect all available channel resource groups to obtain a channel resource group in which data transmission exists; The transmitted signal is detected, and specific feedback information is obtained. According to the detected feedback information and the number of the channel resource group, the ACK/NACK fed back by the user terminal is obtained.
  • the configuration unit 10 is specifically configured to: limit the CCE aggregation level of at least one PDCCH in the feedback window to be greater than or equal to 2;
  • the feedback acquiring unit 20 is specifically configured to: detect a channel resource used by the first antenna port, and determine a channel resource in which the data transmission exists; and before the detection, all CCEs in the window are aggregated into a PDCCH in the PDCCH of level 2 corresponding to the second CCE.
  • the signal on the channel is combined with the signal in the channel corresponding to the first CCE in all PDCCHs; the signal transmitted in the channel resource in which the data transmission exists is detected, and the specific actual feedback information is obtained; according to the actual feedback detected Information and channel resource number, obtain ACK/NACK from the user terminal feedback:.
  • the configuration unit 10 is specifically configured to: configure one channel resource as a channel resource used by the second antenna port by using the high layer signaling; the channel resource may be shared by multiple user terminals in the cell, and the configuration unit 10 needs to be configured to limit sharing. User terminals of the same channel resource perform uplink feedback in a time-sharing manner;
  • the feedback acquiring unit 20 is specifically configured to: detect channel resources used by the first antenna port, and determine channel resources in which data transmission exists; and detect signals on the channel resources of the second antenna port that are pre-configured before detecting The signals in the channel corresponding to the first CCE in the PDCCH are combined; the signals transmitted in the determined channel resources are detected, and specific actual feedback information is obtained. Obtaining ACK/NACK feedback from the user terminal according to the detected actual feedback information and the channel resource number.
  • the configuration unit 10 is specifically configured to: limit the CCE aggregation level of all PDCCHs in the feedback window to at least 2;
  • the feedback obtaining unit 20 is specifically configured to: detect all available channel resources in the feedback window, and determine that there is a channel resource of the data transmission; before detecting, the signal in the channel corresponding to the second CCE in all PDCCHs in the feedback window is all The signals in the channel corresponding to the first CCE in the PDCCH are combined; the signal transmitted on the detected channel is detected, and the ACK/NACK fed back by the user terminal is obtained.
  • the configuration unit 10 is specifically configured to: at least two available CCEs in the limited feedback window, each of which is bound to an available uplink control channel resource; and when the feedback window length is 1, the aggregation level of the CCE of the unique PDCCH in the feedback window is limited. At least 2;
  • the feedback obtaining unit 20 is specifically configured to: detect all available channel resources in the window, determine channel resources in which data transmission exists; if no signal is detected, determine packet loss; perform signal transmission on the determined channel resource Detect, obtain ACK/NACK 0 feedback from the user terminal
  • the configuration unit 10 is specifically configured to: configure one channel resource as a channel resource used by the second antenna port by using the high layer signaling; the channel resource may be shared by multiple user terminals in the cell, and the configuration unit needs to be configured and restricted. User terminals sharing the same channel resource perform uplink feedback in a time-sharing manner;
  • the feedback obtaining unit 20 is specifically configured to: detect all available channel resources in the window, and determine that the channel resource of the data transmission exists; before detecting, the signal on the channel pre-configured to the second antenna port of the user terminal may be all
  • the signals in the channel corresponding to the first CCE in the PDCCH are combined; the signal transmitted on the detected channel is detected, and the ACK/NACK feedback from the user terminal is obtained.
  • the resource obtaining unit 50 is configured to acquire channel resources configured by the base station for performing ACK/NACK feeding, and determine two channel resources used for actual transmission of the two antenna ports.
  • the feedback unit 60 is configured to use the channel resource used by the two actual transmissions acquired by the resource acquiring unit, and transmit ACK/NACK feedback information by means of ACK/NACK multiplexing combined with transmit diversity, or ACK/NACK combining combined with transmit diversity. .
  • the resource acquiring unit 50 is specifically configured to: detect a PDCCH, acquire all available channel resource groups according to an indication of two CCEs pre-agreed by each PDCCH; receive the PDSCH, and obtain L after decoding ACK/NACK information, where L is the length of the feedback window; according to the state of the L ACK/NACK, the actual transmitted feedback information is obtained, and one of the available channel resource groups is selected as the channel resource group used for the actual transmission. And obtaining two channel resource numbers constituting the channel resource group, respectively corresponding to two antenna ports.
  • the feedback unit 60 is specifically configured to transmit actual feedback information through two antenna ports on the two channel resources of the channel resource group acquired by the resource acquiring unit 50.
  • the resource obtaining unit 50 is specifically configured to: detect a PDCCH, acquire channel resources available to all first antenna ports according to an indication of a first CCE of each PDCCH, and determine a CCE.
  • the channel corresponding to the second CCE of the PDCCH whose aggregation level is greater than or equal to 2 is the channel resource used by the second antenna port.
  • the channel resource corresponding to the second CCE in the PDCCH of the first CCE aggregation level 2 received by the UE is used as the resource used by the second antenna port; receiving the PDSCH, after decoding Obtaining L ACK/NACK information, where L is a feedback window length; obtaining feedback information of actual transmission according to a state of L ACK/NACK; and selecting one of all available channel resources corresponding to the first antenna port The channel resource used by the first antenna port to actually transmit;
  • the feedback unit 60 is specifically configured to transmit actual feedback information through two antenna ports on the channel resources corresponding to the two antenna ports acquired by the resource acquiring unit 50.
  • the resource obtaining unit 50 is specifically configured to: obtain, by using the received high layer signaling, a channel resource number of a channel resource used by the second antenna port; and detect a PDCCH according to each PDCCH.
  • An indication of a CCE which acquires the channel resources used by all the first antenna ports; receives the PDSCH, and obtains L ACK/NACK letters after decoding Interest, where L is the length of the feedback window; according to the state of the L ACK/NACK, the actual transmitted feedback information is obtained, and one of the available channel resources corresponding to the first antenna port is selected as the first antenna port.
  • the feedback unit 60 is specifically configured to transmit actual feedback information through two antenna ports on the channel resources corresponding to the two antenna ports acquired by the resource acquiring unit 50.
  • the resource obtaining unit 50 is specifically configured to: detect a PDCCH, and learn, according to an indication of the first and second CCEs in each PDCCH, all available channel resource numbers; and according to a prior agreement,
  • the channel resource numbers corresponding to the first and second CCEs in one PDCCH are selected as channel resources used by the first and second antenna ports.
  • the channel resource numbers corresponding to the first and second CCEs on the Mth PDCCH ie, the PDCCH corresponding to the last downlink data packet actually received by the UE) are selected as the first and second antenna ports.
  • the channel resource used receives the PDSCH, and obtains M, ACK/NACK information after decoding.
  • M and ACK/NACK belonging to the same user and the same codeword are logically added to obtain 1 or 2 bits of feedback information, where M is the number of downlink data packets received by the user terminal;
  • the feedback unit 60 is specifically configured to transmit feedback information on the channel resources corresponding to the two antenna ports acquired by the resource acquiring unit 50 to implement transmit diversity.
  • the resource obtaining unit 50 is specifically configured to: when the user terminal does not receive any CCE or only receives one CCE, does not send any feedback information or roll back to the single antenna mode for transmission; When the terminal receives two or more CCEs: detecting the PDCCH, when the feedback window length is greater than 1, all the available channel resource numbers in the feedback window are obtained according to the indication of the first CCE in each PDCCH, and according to the advance The agreement selects two of them as the channel resources used for transmission on the two antenna ports.
  • the number corresponding to the first CCE of the Mth PDCCH and the number corresponding to one CCE adjacent thereto can be optimally selected as the transmission used on the two antenna ports.
  • M and ACK/NACK belonging to the same user and the same codeword are logically added to obtain 1 or 2 bits of feedback information; where M is the number of downlink data packets received by the user terminal;
  • the feedback unit 60 is specifically configured to transmit feedback information on the channel resources corresponding to the two antenna ports acquired by the resource acquiring unit 50 to implement transmit diversity.
  • the resource obtaining unit 50 is specifically configured to: learn, according to the received high layer signaling, a channel resource number for the second antenna port; and detect the PDCCH according to the first CCE in each PDCCH. The indication, knows all available channel resource numbers corresponding to the first antenna port, and selects a channel resource used as the first antenna port according to a predetermined convention.
  • the channel resource number corresponding to the first CCE on the Mth PDCCH may be selected; the PDSCH is received, and M, ACK/NACK information is obtained after decoding; M, ACKs belonging to the same user and the same codeword are used. /NACK is logically added to obtain 1 or 2 bits of feedback information; where M is the number of downlink data packets received by the user terminal;
  • the feedback unit 60 is specifically configured to transmit feedback information on the channel resources corresponding to the two antenna ports acquired by the resource acquiring unit 50 to implement transmit diversity.
  • the device and the system provided by the embodiments of the present invention implement the reservation of the channel resources used by the ACK/NACK feed, and the method for resource reservation supports the transmit diversity, thereby improving the reliability of the uplink control channel transmission;
  • the method is simple and easy to implement, and is suitable for both FDD and TDD systems, and is compatible with the Rel-8 system.
  • the present invention can be implemented by hardware or by software plus a necessary general hardware platform.
  • the technical solution of the present invention may be embodied in the form of a software product, which may be stored in a non-volatile storage medium (which may be a CD-ROM, a USB flash drive, a mobile hard disk, etc.), including several The instructions are for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform the methods described in various embodiments of the present invention.
  • a computer device which may be a personal computer, server, or network device, etc.
  • the units in the apparatus in the embodiment can be distributed in the apparatus of the embodiment according to the embodiment, or the corresponding changes can be located in one or more apparatuses different from the embodiment.
  • the units of the above embodiments may be combined into one unit, or may be further split into a plurality of sub-units.

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Description

ACK/NACK资源预留的方法、 系统和设备 本申请要求于 2009 年 8 月 18 日提交中国专利局, 申请号为 200910090953.0, 发明名称为 "ACK/NACK资源预留的方法、 系统和设 备" 的中国专利申请的优先权, 其全部内容通过引用结合在本申请中。 技术领域
本发明涉及通讯技术领域, 尤其涉及一种 ACK/NACK资源预留的方 法、 系统和设备。 背景技术
LTE ( Long Term Evolution, 长期演进) 系统采用 HARQ ( Hybrid Automatic Repeat reQuest,混合自动重传请求)来提高数据传输的可靠性, 当下行 HARQ功能开启后, UE ( User Equipment, 用户终端 )对接收到 的下行数据包进行译码, 若译码正确则向基站反馈 ACK, 若译码失败, 则向基站反馈 NACK, 要求基站重传该数据包。 当下行持续调度业务结 束后, 基站向 UE发送 SPS ( Semi-persistent Scheduling持续调度) 资源 释放指示, 通知 UE释放分配给该业务的所有资源, UE正确接收该指示 后将向基站反馈 ACK:。
对于 LTE多载波聚合系统, 基站将在一个子帧中占用多个下行载波 向 UE发送数据, 而每个载波上都是一个独立的 HARQ实体, 因此 UE 需要在一个上行子帧中反馈多个 ACK/NACK信息。
对于上述 ACK/NACK反馈问题, 可沿用现有技术中 LTE Rel-8 ( Release 8, 版本 8 )定义的方法进行反馈, 具体包括: 合并和复用, 即 利用一个 PUCCH ( Physical Uplink Control Channel , 物理上行控制信道) 的信道资源反馈多个 ACK/NACK信息。 下面将分别描述这两种方法, 其 中假设反馈窗口长度为 L, L为需要在同一个上行子帧中进行 ACK/NACK 反馈的下行子帧的数量。 对于 FDD系统, L=l ; 对于 TDD系统, L=M, 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 Downlink association set index K : {k0 , k - - - kM_x } for TDD
Figure imgf000004_0001
对于 ACK/NACK合并模式, 将反馈窗口内属于同一用户、 同一码字 的 L个 ACK/NACK进行逻辑加, 得到 1或 2比特(下行双码字时 )反馈 信息, 图 1 分别表示了单码字和多码字的合并过程。 这时只需要使用 PUCCH Format la/lb反馈 1或 2比特的 ACK/NACK即可。 该方法还可 以有效地解决 PUCCH覆盖问题, 适合位于小区较边缘位置的 UE。
对于 ACK/NACK 复用模式, 同样也适用于单码字和多码字的 PDSCH。 对于多码字的 PDSCH传输, 首先将属于同一个用户的不同码 字对应的 ACK/NACK进行逻辑加; 之后, 根据 L个复合 ACK/NACK所 组成的状态, 查表确定 2 比特的实际传输反馈信息及传输所使用的反馈 信道编号, 使用 PUCCH Format lb在选定的反馈信道中传输这 2比特的 反馈信息。 对于单码字的 PDSCH传输, 则直接根据 L个 ACK/NACK反 馈情况, 选择实际传输的反馈信息和反馈信道。 具体过程如图 2所示, 实际的反馈信息统一定义为 2 比特, 因此需要 QPSK ( Quadrature Phase-Shift Keying, 正交相移调制)调制和 PUCCH Format lb传送。 该 方法有效避免了不必要的重传, 适用于小区中心用户, 提高传输效率。 无论是合并还是复用的方法, UE都仅仅使用一个 PUCCH信道资源 来发送一个 ACK/NACK反馈信息, 保持了上行的单载波特性。
对于动态调度的下行数据包,其 ACK/NACK反馈信息可用的上行信 道编号将根据承载该数据包调度信息的 PDCCH ( Physical Downlink Control Channel, 物理下行控制信道) 的第一个 CCE ( Control Channel Element, 控制信道单元)编号得到, 即根据该 PDCCH的第一个 CCE可 以唯一确定一个上行反馈信道资源编号。 对于合并模式, 设 M,为实际接 收到的下行数据包数目, 则实际使用的上行控制信道资源由反馈窗口内 第 M,个 PDCCH的第一个 CCE指示; 而对于复用模式,反馈窗口内每一 个 PDCCH都对应着一个可用的上行信道资源编号,之后将根据具体的反 馈状态从所有可用信道中选取一个信道资源传输实际的反馈信息。
对于持续调度的下行数据包所对应的 ACK/NACK反馈,由于它们都 是周期性反馈的, 基站可预先知道各信息传输的具体时间位置, 因此传 输以上控制信令的信道都是由基站通过 RRC (Radio Resource Control, 无 线资源控制)信令预先分配给 UE的。
LTE-A系统目前确定最多可支持 5个载波进行聚合。 对于载波聚合 系统,反馈窗口则定义为需要在同一个子帧内进行 ACK/NACK反馈的多 个下行载波及下行子帧。 对于 FDD系统, 反馈窗口的大小 L=UE聚合的 下行载波数量 N。 对于 TDD系统, 反馈窗口的大小 L=N X M, 其中 N为 UE聚合的下行载波数, M为表 1中每一栏 K的数量。
目前, 在 LTE-A ( LTE-Advanced, 长期演进升级) 系统中, 对于配 置有多个发送天线的 UE,其上行控制信道还可以使用 ORTD( Orthogonal Resource Transmit Diversity, 正交资源发送分集) 的方式实现发送分集, 从而提高上行控制信令传输的可靠性或容量。 所谓 ORTD, 即每个天线 端口对应一个 PUCCH资源编号,相同的信息经过由不同天线端口上的资 源编号选择出的正交序列扩频后, 通过相应的天线端口同时发送出去。 接收端将来自不同天线端口的信号分离出来后进行合并检测, 从而得到 分集增益。 图 3为两个天线端口时,使用 ORTD进行发送分集的示意图,
, „ PUCCH „ PUCCH ,
其中 s为反馈的 ACK/NACK信息, ηιn2 分别表示两个天线端口 上的两个不同的上行控制信道资源编号, 对应着不同的正交扩频序列。 现有技术中存在的问题在于, 在长期演进系统中, UE可以使用发送 分集的方式在复用和合并模式下传输 ACK/NACK信息,此时需要使用多 个上行控制资源编号, 目前对于该种情况下上行控制信道资源预留的方 法和对上行控制资源编号的指示方法还没有可行的具体实现。 发明内容
本发明的实施例提供一种 ACK/NACK资源预留的方法、系统和设备, 用于实现上行控制信道资源的预留。
本发明的实施例提供了一种 ACK/NACK资源预留的方法, 包括: 所述用户终端使用两个天线端口通过发送分集进行 ACK/NACK^馈 时, 需要使用两个上行控制信道资源, 每个信道资源对应一个编号, 每 一个天线端口对应一个信道资源。 其中第一个天线端口对应的可用信道 资源编号的指示方式具体为: 对于动态调度的下行数据包, 所述的每一 个可用信道资源编号都与所述的每一个下行数据包对应的物理下行控制 信道 PDCCH所占用的第一个控制信道单元 CCE编号绑定; 对于持续调度 的下行数据包, 所述的可用信道资源编号由所述基站通过无线资源控制 RRC信令预先分配给用户终端。
其中, 所述基站对用户终端通过发送分集进行 ACK/NACK^馈时可 用的上行控制信道资源进行配置, 包括:
所述基站限定反馈窗口内所述用户终端所有 PDCCH的 CCE的聚合等 级至少为 2 ,且每一个 PDCCH预先约定的两个 CCE对应的两个信道资源编 号组成一个资源编号组;
其中, 所述基站通知所述用户终端所有的所述可用的上行控制信道 资源后, 还包括:
所述用户终端检测 PDCCH, 根据每个 PDCCH预先约定的两个 CCE 的指示, 获取所有可用的信道资源组; 所述用户终端接收 PDSCH, 译码后得到 L个 ACK/NACK信息, 其中 L 为反馈窗口长度;
所述用户终端根据所述 L个 ACK/NACK所组成的状态,获取实际传输 的反馈信息, 并在所有可用的信道资源组中选择一个作为实际传输所使 用的信道资源组, 并获得组成该信道资源组的两个信道资源编号, 分别 对应两个天线端口;
所述用户终端同时在所述获取的信道资源组的两个信道资源上通过 两个天线端口传输所述实际反馈信息。
其中, 所述基站在所述配置的信道资源中获取所述用户终端反馈的 ACK/NACK, 包括:
所述基站分别对同一信道资源组内的两个物理上行控制信道 PUCCH 上的信号进行合并, 之后对所有可用信道资源组进行检测, 获取存在数 据传输的信道资源组;
所述基站对所述信道资源组内所传输的信号进行检测, 获知具体的 实际反馈信息;
所述基站根据检测到的实际反馈信息及所述信道资源组的编号, 获 取所述用户终端反馈的 ACK/NACK:。
其中, 所述基站对用户终端通过发送分集进行 ACK/NACK^馈时可 用的上行控制信道资源进行配置, 包括:
所述基站限定反馈窗口内至少有一个 PDCCH的 CCE聚合等级大于等 于 2。
其中, 所述基站通知所述用户终端所有的所述可用信道资源后, 还 包括:
所述用户终端检测 PDCCH,根据每个 PDCCH的第一个 CCE 的指示, 获取所有第一个天线端口可用的信道资源, 并确定某个 CCE的聚合等级 大于等于 2的 PDCCH的第二个 CCE对应的信道为第二个天线端口所使用 的信道资源;
所述用户终端接收 PDSCH, 译码后得到 L个 ACK/NACK信息, 其中 L 为反馈窗口长度; 所述用户终端根据所述 L个 ACK/NACK所组成的状态,获取实际传输 的反馈信息, 并在对应第一个天线端口的所有可用信道资源中选择一个 作为第一个天线端口实际传输所使用的信道资源;
所述用户终端同时在两个天线端口对应的信道资源上通过两个天线 端口传输所述实际反馈信息。
其中, 所述基站在所述配置的信道资源中获取所述用户终端反馈的 ACK/NACK, 包括:
所述基站对第一个天线端口所使用的信道资源进行检测, 确定存在 数据传输的信道资源; 所述检测前, 将窗口内所有 CCE聚合等级≥2的 PDCCH中第二个 CCE所对应的信道上的信号与所有 PDCCH中第一个 CCE所对应的信道中的信号进行合并;
所述基站对存在数据传输的信道资源内传输的信号进行检测, 获知 具体的实际反馈信息;
所述基站根据检测到的实际反馈信息及信道资源编号, 获取所述用 户终端反馈的 ACK/NACK:。
其中, 所述基站对用户终端通过发送分集进行 ACK/NACK^馈时可 用的上行控制信道资源进行配置, 包括:
所述基站通过高层信令配置一个信道资源作为第二个天线端口所使 用的信道资源; 所述信道资源可以被小区内多个用户终端共享, 所述基 站需要通过配置, 限制共享同一信道资源的用户终端分时进行上行反馈。
其中, 所述基站通知所述用户终端所有的所述可用的上行控制信道 资源后, 还包括:
所述用户终端通过接收到的高层信令, 获取第二个天线端口所使用 的信道资源的信道资源编号;
所述用户终端检测 PDCCH,根据每个 PDCCH的第一个 CCE 的指示, 获取所有第一个天线端口可用的信道资源;
所述用户终端接收 PDSCH, 译码后得到 L个 ACK/NACK信息, 其中 L 为反馈窗口长度; 所述用户终端根据所述 L个 ACK/NACK所组成的状态,获取实际传输 反馈信息, 并在对应第一个天线端口的所有可用信道资源中选择一个作 为第一个天线端口实际传输所使用的信道资源;
所述用户终端同时在两个天线端口对应的信道资源上通过两个天线 端口传输所述实际反馈信息。
其中, 所述基站在所述配置的信道资源中获取所述用户终端反馈的 ACK/NACK, 包括:
所述基站对第一个天线端口所使用的信道资源进行检测, 确定存在 数据传输的信道资源; 所述检测前, 将预先配置的所述第二个天线端口 的信道资源上的信号与所有 PDCCH中第一个 CCE所对应的信道中的信号 进行合并;
所述基站对所确定的信道资源内所传输的信号进行检测, 获知具体 的实际反馈信息。
所述基站根据检测到的实际反馈信息及信道资源编号, 获取所述用 户终端反馈的 ACK/NACK:。
其中, 所述基站对用户终端通过发送分集进行 ACK/NACK^馈时可 用的上行控制信道资源进行配置, 包括:
所述基站限定反馈窗口内所有 PDCCH的 CCE聚合等级至少为 2。 其中, 所述基站通知所述用户终端所有的所述可用的上行控制信道 资源后, 还包括:
所述用户终端检测 PDCCH,根据每个 PDCCH中第一个和第二个 CCE 的指示, 获知所有可用的信道资源编号; 并根据预先的约定, 选取一个 PDCCH中第一个和第二个 CCE所对应的信道资源编号作为第一和第二个 天线端口使用的信道资源;
所述用户终端接收 PDSCH, 译码后得到 M'个 ACK/NACK信息。 将属 于同一用户、 同一码字的 M,个 ACK/NACK进行逻辑加, 得到 1或 2比特的 反馈信息; 其中 M'为用户终端接收到的下行数据包的个数;
所述用户终端同时在两个天线端口所对应的信道资源上传输所述反 馈信息, 实现发送分集。 其中, 所述基站在所述配置的信道资源中获取所述用户终端反馈的
ACK/NACK, 包括:
所述基站对反馈窗口内的所有可用信道资源上进行检测, 确定存在 数据传输的信道资源; 所述检测前, 将反馈窗口内所有 PDCCH中第二个 CCE所对应信道中的信号与所有 PDCCH中第一个 CCE所对应信道中的信 号进行合并;
所述基站对检测到的信道上所传输的信号进行检测, 获知具体的反 馈信息。
其中, 所述基站对用户终端通过发送分集进行 ACK/NACK^馈时可 用的上行控制信道资源进行配置, 包括:
所述基站限定反馈窗口内至少存在两个可用的 CCE, 各绑定一个可 用的上行控制信道资源; 当反馈窗口长度为 1时, 限定反馈窗口内唯一的 PDCCH的 CCE的聚合等级至少为 2。
其中, 所述基站通知所述用户终端所有的所述可用信道资源后, 还 包括:
当所述用户终端没有接收到任何 CCE或者仅仅接收到一个 CCE时, 不发送任何反馈信息或回退到单天线模式进行传输;
当所述用户终端接收到两个及两个以上的 CCE时:
所述用户终端检测 PDCCH, 当反馈窗口长度大于 1时, 根据每个 PDCCH中第一个 CCE的指示,获知反馈窗口内所有可用的信道资源编号, 并根据预先的约定选取其中的两个, 作为两个天线端口上传输所使用的 信道资源; 当反馈窗口长度为 1时, 所述用户终端将根据反馈窗口内唯一 的 PDCCH中第一个和第二个 CCE的指示, 获取两个信道资源, 作为两个 天线端口上传输所使用的信道资源;
所述用户终端接收 PDSCH, 译码后得到 M'个 ACK/NACK信息。 将属 于同一用户、 同一码字的 M,个 ACK/NACK进行逻辑加, 得到 1或 2比特反 馈信息; 其中 M '为用户终端接收到的下行数据包的个数;
所述用户终端同时在两个天线端口所对应的信道资源上传输反馈信 息, 实现发送分集。 其中, 所述基站在所述配置的信道资源中获取所述用户终端反馈的
ACK/NACK, 包括:
所述基站对窗口内的所有可用信道资源进行检测, 确定存在数据传 输的信道资源; 如果检测不到任何信号, 则判断丟包;
所述基站对确定的信道资源上所传输的信号进行检测, 获取所述用 户终端反馈的 ACK/NACK:。
其中, 所述基站对用户终端通过发送分集进行 ACK/NACK^馈时可 用的上行控制信道资源进行配置, 包括:
所述基站通过高层信令配置一个信道资源作为第二个天线端口所使 用的信道资源。 所述信道资源可以被小区内多个用户终端共享, 所述基 站需要通过配置, 限制共享同一信道资源的用户终端分时进行上行反馈。
其中, 所述基站通知所述用户终端所有的所述可用信道资源后, 还 包括:
所述用户终端根据接收到的高层信令, 获知用于第二个天线端口的 信道资源编号;
所述用户终端检测 PDCCH, 根据每个 PDCCH中第一个 CCE的指示, 获知第一个天线端口对应的所有可用信道资源编号, 并根据预先的约定 选择一个作为第一个天线端口所使用的信道资源;
所述用户终端接收 PDSCH, 译码后得到 M'个 ACK/NACK信息; 将属 于同一用户、 同一码字的 M,个 ACK/NACK进行逻辑加, 得到 1或 2比特反 馈信息; 其中 M '为用户终端接收到的下行数据包的个数;
所述用户终端同时在两个天线端口所对应的信道资源上传输实际反 馈信息, 实现发送分集。
其中, 所述基站在所述配置的信道资源中获取所述用户终端反馈的 ACK/NACK, 包括:
所述基站对窗口内的所有可用信道资源进行检测, 确定存在数据传 输的信道资源; 所述检测前, 可先将预先配置给所述用户终端第二个天 线端口的信道上的信号与所有 PDCCH中第一个 CCE所对应的信道中的信 号进行合并; 所述基站对检测到的信道上所传输的信号进行检测, 获知所述用户 终端反馈的 ACK/NACK:。
本发明的实施例还提供一种实现 ACK/NACK资源预留的系统,包括: 基站, 用于对用户终端通过发送分集进行 ACK/NACK^馈时可用的 上行控制信道资源进行配置并通知所述用户终端; 在所述配置的信道资 源组中获取所述用户终端反馈的 ACK/NACK;
用户终端, 用于使用所述基站指示的信道资源, 通过 ACK/NACK复 用结合发送分集、 或 ACK/NACK合并结合发送分集的方式, 传输 AC謹 ACK的反馈信息。
本发明的实施例还提供一种基站, 包括:
配置单元, 用于对用户终端通过发送分集进行 ACK/NACK^馈时可 用的上行控制信道资源进行配置并通知所述用户终端;
反馈获取单元, 用于在所述配置单元配置的信道资源中获取所述用 户终端反馈的 ACK/NACK:。
其中, 所述配置单元, 具体用于所述用户终端使用两个天线端口通 过发送分集进行 ACK/NACK^馈时, 需要使用两个上行控制信道资源, 每个信道资源对应一个编号, 每一个天线端口对应一个信道资源。 其中 第一个天线端口对应的可用信道资源编号的指示方式具体为: 对于动态 调度的下行数据包, 所述的每一个可用信道资源编号都与所述的每一个 下行数据包对应的物理下行控制信道 PDCCH所占用的第一个控制信道单 元 CCE编号绑定, 即反馈窗口内每一个下行数据包都对应着一个可用的 上行控制信道资源; 对于持续调度的下行数据包, 所述的可用信道资源 编号由所述基站通过无线资源控制 RRC信令预先分配给用户终端。
其中, 所述配置单元还用于: 限定反馈窗口内所述用户终端所有 PDCCH的控制信道单元 CCE的聚合等级至少为 2, 且每一个 PDCCH的两 个 CCE对应的两个信道资源编号组成一个资源编号组;
所述反馈获取单元具体用于: 分别对同一信道资源组内的两个 PUCCH上的信号进行合并, 之后对所有可用信道资源组进行检测, 获取 存在数据传输的信道资源组; 对所述信道资源组内所传输的信号进行检 测, 获知具体的实际反馈信息; 根据检测到的实际反馈信息及所述信道 资源组的编号, 获取所述用户终端反馈的 ACK/NACK:。
其中, 所述配置单元还用于: 限定反馈窗口内至少有一个 PDCCH的 CCE聚合等级大于等于 2;
所述反馈获取单元具体用于: 对第一个天线端口所使用的信道资源 进行检测, 确定存在数据传输的信道资源; 所述检测前, 将窗口内所有 CCE聚合等级≥2的 PDCCH中第二个 CCE所对应的信道上的信号与所有 PDCCH中第一个 CCE所对应的信道中的信号进行合并; 对存在数据传输 的信道资源内传输的信号进行检测, 获知具体的实际反馈信息; 根据检 测到的实际反馈信息及信道资源编号, 获取所述用户终端反馈的 ACK/NACK0
其中, 所述配置单元还用于: 通过高层信令配置一个信道资源作为 第二个天线端口所使用的信道资源; 所述信道资源可以被小区内多个用 户终端共享, 所述配置单元需要通过配置, 限制共享同一信道资源的用 户终端分时进行上行反馈;
所述反馈获取单元具体用于: 对第一个天线端口所使用的信道资源 进行检测, 确定存在数据传输的信道资源; 所述检测前, 将预先配置的 所述第二个天线端口的信道资源上的信号与所有 PDCCH中第一个 CCE所 对应的信道中的信号进行合并; 对所确定的信道资源内所传输的信号进 行检测, 获知具体的实际反馈信息。 根据检测到的实际反馈信息及信道 资源编号, 获取所述用户终端反馈的 ACK/NACK:。
其中, 所述配置单元还用于: 限定反馈窗口内所有 PDCCH的 CCE聚 合等级至少为 2;
所述反馈获取单元具体用于: 对反馈窗口内的所有可用信道资源进 行检测, 确定存在数据传输的信道资源; 所述检测前, 将反馈窗口内所 有 PDCCH中第二个 CCE所对应信道中的信号与所有 PDCCH中第一个 CCE所对应信道中的信号进行合并; 对检测到的信道上所传输的信号进 行检测, 获取所述用户终端反馈的 ACK/NACK:。 其中, 所述配置单元还用于: 限定反馈窗口内至少存在两个可用的
CCE, 各绑定一个可用的上行控制信道资源; 当反馈窗口长度为 1时, 限 定反馈窗口内唯一的 PDCCH的 CCE的聚合等级至少为 2;
所述反馈获取单元具体用于: 对窗口内的所有可用信道资源进行检 测, 确定存在数据传输的信道资源; 如果检测不到任何信号, 则判断丟 包; 对确定的信道资源上所传输的信号进行检测, 获取所述用户终端反 馈的 AC薩 ACK:。
其中, 所述配置单元还用于: 通过高层信令配置一个信道资源作为 第二个天线端口所使用的信道资源; 所述信道资源可以被小区内多个用 户终端共享, 所述配置单元需要通过配置, 限制共享同一信道资源的用 户终端分时进行上行反馈;
所述反馈获取单元具体用于: 对窗口内的所有可用信道资源进行检 测, 确定存在数据传输的信道资源; 所述检测前, 可先将预先配置给所 述用户终端第二个天线端口的信道上的信号与所有 PDCCH中第一个 CCE 所对应的信道中的信号进行合并; 对检测到的信道上所传输的信号进行 检测, 获知所述用户终端反馈的 ACK/NACK:。
本发明的实施例还提供一种用户终端, 包括:
资源获取单元, 用于获取基站配置的进行 ACK/NACK^馈可用的信 道资源; 并确定两个天线端口实际传输所使用的两个信道资源。
反馈单元, 用于使用所述资源获取单元获取的两个实际传输所使用 的信道资源, 通过 ACK/NACK复用结合发送分集、 或 ACK/NACK合并结 合发送分集的方式, 传输 ACK/NACK的反馈信息。
其中, 所述资源获取单元具体用于: 检测 PDCCH, 根据每个 PDCCH 预先约定的两个 CCE 的指示,获取所有可用的信道资源组;接收 PDSCH, 译码后得到 L个 ACK/NACK信息, 其中 L为反馈窗口长度; 根据所述 L个 ACK/NACK所组成的状态, 获取实际传输的反馈信息, 并在所有可用的 信道资源组中选择一个作为实际传输所使用的信道资源组, 并获得组成 该信道资源组的两个信道资源编号, 分别对应两个天线端口; 所述反馈单元具体用于, 同时在所述资源获取单元获取的信道资源 组的两个信道资源上通过两个天线端口传输所述实际反馈信息。
其中, 所述资源获取单元具体用于: 检测 PDCCH, 根据每个 PDCCH 的第一个 CCE 的指示, 获取所有第一个天线端口可用的信道资源, 并确 定某个 CCE的聚合等级大于等于 2的 PDCCH的第二个 CCE对应的信道为 第二个天线端口所使用的信道资源; 接收 PDSCH, 译码后得到 L个 ACK/NACK信息, 其中 L为反馈窗口长度; 根据所述 L个 ACK/NACK所组 成的状态, 获取实际传输的反馈信息; 并在对应第一个天线端口的所有 可用信道资源中选择一个作为第一个天线端口实际传输所使用的信道资 源;
所述反馈单元具体用于, 同时在所述资源获取单元获取的两个天线 端口对应的信道资源上通过两个天线端口传输所述实际反馈信息。
其中, 所述资源获取单元具体用于: 通过接收到的高层信令, 获取 第二个天线端口所使用的信道资源的信道资源编号; 检测 PDCCH, 根据 每个 PDCCH的第一个 CCE 的指示,获取所有第一个天线端口所使用的信 道资源; 接收 PDSCH, 译码后得到 L个 ACK/NACK信息, 其中 L为反馈窗 口长度;根据所述 L个 ACK/NACK所组成的状态,获取实际传输的反馈信 息, 并在对应第一个天线端口的所有可用信道资源中选择一个作为第一 个天线端口实际传输所使用的信道资源;
所述反馈单元具体用于, 同时在所述资源获取单元获取的两个天线 端口对应的信道资源上通过两个天线端口传输所述实际反馈信息。
其中, 所述资源获取单元具体用于: 检测 PDCCH, 根据每个 PDCCH 中第一个和第二个 CCE的指示, 获知所有可用的信道资源编号; 并根据 预先的约定, 选取一个 PDCCH中第一个和第二个 CCE所对应的信道资源 编号作为第一个和第二个天线端口使用的信道资源; 接收 PDSCH, 译码 后得到 M'个 ACK/NACK信息。 将属于同一用户、 同一码字的 M'个 ACK/NACK进行逻辑加, 得到 1或 2比特的反馈信息, 其中 M,为用户终端 接收到的下行数据包的个数; 所述反馈单元具体用于, 同时在所述资源获取单元获取的两个天线 端口所对应的信道资源上传输所述反馈信息, 实现发送分集。
其中, 所述资源获取单元具体用于: 当所述用户终端没有接收到任 何 CCE或者仅仅接收到一个 CCE时, 不发送任何反馈信息或回退到单天 线模式进行传输; 当所述用户终端接收到两个及两个以上的 CCE时: 检 测 PDCCH, 当反馈窗口长度大于 1时, 根据每个 PDCCH中第一个 CCE的 指示, 获知反馈窗口内所有可用的信道资源编号, 并根据预先的约定选 取其中的两个, 作为两个天线端口上传输所使用的信道资源; 当反馈窗 口长度为 1时,所述用户终端将根据反馈窗口内唯一的 PDCCH中第一个和 第二个 CCE的指示, 获取两个信道资源, 作为两个天线端口上传输所使 用的信道资源; 接收 PDSCH, 译码后得到 M'个 ACK/NACK信息。 将属于 同一用户、 同一码字的 M,个 ACK/NACK进行逻辑加, 得到 1或 2比特反馈 信息; 其中 M'为用户终端接收到的下行数据包的个数;
所述反馈单元具体用于, 同时在所述资源获取单元获取的两个天线 端口所对应的信道资源上传输所述反馈信息, 实现发送分集。
其中, 所述资源获取单元具体用于: 根据接收到的高层信令, 获知 用于第二个天线端口的信道资源编号; 检测 PDCCH, 根据每个 PDCCH中 第一个 CCE的指示, 获知第一个天线端口对应的所有可用信道资源编号, 并根据预先的约定选择一个作为第一个天线端口所使用的信道资源; 接 收 PDSCH, 译码后得到 M'个 ACK/NACK信息; 将属于同一用户、 同一码 字的 M,个 ACK/NACK进行逻辑加, 得到 1或 2比特反馈信息; 其中 M,为用 户终端接收到的下行数据包的个数;
所述反馈单元具体用于, 同时在所述资源获取单元获取的两个天线 端口所对应的信道资源上传输所述反馈信息, 实现发送分集。
与现有技术相比, 本发明的实施例具有以下优点:
实现了对多 ACK/NACK^馈所使用的信道资源的预留, 且该资源预 留的方法支持发送分集, 提高了上行控制信道传输的可靠性; 且方法简 单、 易于实施。 附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案, 下面将 对实施例或现有技术描述中所需要使用的附图作简单地介绍, 显而易见 地, 下面描述中的附图仅仅是本发明的一些实施例, 对于本领域普通技 术人员来讲, 在不付出创造性劳动性的前提下, 还可以根据这些附图获 得其他的附图。
图 1 是现有技术中 ACK/NACK合并的示意图;
图 2是现有技术中 ACK/NACK复用的示意图;
图 3是现有技术中两天线端口发送分集示意图;
图 4是本发明实施例中提供的 ACK/NACK资源预留的方法流程图; 图 5是本发明一实施例中使用的 ACK/NACK复用反馈方式中反馈窗 口的 PDCCH的 CCE的示意图;
图 6是本发明一实施例中提供的 ACK/NACK复用反馈方式中反馈窗 口的 PDCCH的 CCE的示意图;
图 7是本发明一实施例中提供的 ACK/NACK合并反馈方式中反馈窗 口的 PDCCH的 CCE的示意图;
图 8是本发明一实施例中提供的 ACK/NACK合并反馈方式中反馈窗 口的 PDCCH的 CCE的示意图;
图 9是本发明实施例中提供的基站的结构示意图;
图 10是本发明实施例中提供的用户终端的结构示意图。
具体实施方式
下面将结合本发明实施例中的附图, 对本发明实施例中的技术方案 进行清楚、 完整地描述, 显然, 所描述的实施例仅是本发明一部分实施 例, 而不是全部的实施例。 基于本发明中的实施例, 本领域普通技术人 员在没有作出创造性劳动前提下所获得的所有其他实施例, 都属于本发 明保护的范围。
本发明的实施例中提供了一种 ACK/NACK资源预留的方法, 如图 4 所示, 包括:
步骤 s401、 基站对用户终端通过发送分集进行 ACK/NACK^馈时可 用的上行控制信道资源进行配置并通知用户终端;
步骤 s402、 基站在配置的上行控制信道资源中获取用户终端反馈的 ACK/NACK0
本发明的实施例中, 将 ACK/NACK复用、 ACK/NACK合并反馈方式 与发送分集结合使用, 以提高传输的可靠性和覆盖范围。 如果 UE被配置 为使用分集模式传输 PUCCH, 则需要至少两个 PUCCH信道资源编号。 以 下实施例中,以两天线端口的 ORTD为例分别讨论复用和合并模式的信道 资源指示和预留的方法。
本发明的实施例中,对于 ACK/NACK复用 +发送分集模式,其中一个 天线端口对应的可用信道资源编号仍可以重用 Rel-8的指示方式, 即对于 动态调度的下行数据包, 其可用上行信道资源编号与其对应的 PDCCH所 占用的第一个 CCE编号绑定, 一个反馈窗口内的每个下行数据包都对应 着一个可用的上行控制信道资源。 对于持续调度的下行数据包所对应的 ACK/NACK反馈, 可用的上控制信道由基站通过 RRC信令预先分配给 UE。
对于另一个天线端口的信道资源指示方式, 本发明的实施例中提供 了两种指示方法, 以下分别进行描述。
方法 1 :
第二个信道资源编号仍和对应的 PDCCH的 CCE编号绑定。此时, 由 于第一个 CCE已经和第一个信道资源编号绑定在一起, 于是需要另一个
CCE来指示这个用于第二个天线端口上的 PUCCH信道资源编号。 可以分 为两种具体的指示方法: (指示方法 1 ) : 基站通过调度限定反馈窗口内该 UE所有 PDCCH的 CCE聚合等级都不小于 2 (在 PDCCH上, 承载下行链路控制信息 DCI的基 本单元是 CCE, PDCCH中 CCE聚合等级通常可以为 1、 2、 4、 8等) ; 这 样可以保证反馈窗口内每个 PDCCH都至少对应着两个可用的上行控制信 道资源。 每一个 PDCCH预先约定的两个 CCE对应的两个信道资源编号组 成一个资源编号组(考虑到 CCE聚合等级, 优选每个 PDCCH的第一个和 第二个 CCE对应的信道资源编号组成一个资源编号组) , 如图 5所示。 使 用信道资源组代替 LTE Rel-8中的信道资源后, 即可沿用 Rel-8定义的方法 进行 ACK/NACK复用传输。 如图 4所示, 设 L为反馈窗口的长度, UE在 L 个信道资源组中按照 Rel-8的查表方法选取一组, 进行发送分集的两个天 线端口各使用资源组中的一个信道资源发送实际反馈信息。
基站端处理过程: 基站通过调度, 限定反馈窗口内该 UE的所有 PDCCH的 CCE聚合等级= max ( 2 , 由 PDCCH检测可靠性确定的聚合等 级) 。
UE端处理流程包括:
步骤 1 , 检测 PDCCH, 获知所有可用的信道资源组。
步骤 2, 接收 PDSCH, 译码后得到 L个 ACK/NACK信息, 其中 L为反 馈窗口的长度。
步骤 3 , UE根据 L个 ACK/NACK所组成的状态, 查表确定实际传 输的实际反馈信息及传输所使用的具体的反馈信道组的编号。 用户终端 根据 L个 ACK/NACK所组成的状态,获取实际传输反馈信息,并在所有 可用的信道资源组中选择一个作为实际传输所使用的信道资源组, 并获 得组成该信道资源组的两个信道资源编号, 分别对应两个天线端口。
步骤 4, UE同时在所述获取的信道资源组的两个信道资源上通过两个 天线端口传输所述实际反馈信息。
基站端接收流程包括:
步骤 1 , 对所有可用信道资源组进行检测, 确定哪个信道资源组上有 数据传输, 即可获知选定的信道资源组编号。 进行检测前, 可先对同一 资源组内的两个 PUCCH上的信号进行合并。 步骤 2, 对选定信道资源组内所传输的信号进行检测, 获知具体的实 际反馈信息。
步骤 3 , 根据检测到的实际反馈信息及信道资源组编号, 查表获知 L 个 ACK/NACK的具体状态。
(指示方法 2 )基站通过调度限定反馈窗口内至少有一个 PDCCH的 CCE聚合等级 2。按照 Rel-8定义的方法, UE在反馈窗口内所有 PDCCH 第一个 CCE对应的信道资源中进行信道选择, 确定第一个天线端口所使 用的信道资源及待反馈信息, 并确定某个 PDCCH (可以较佳地可选择窗 口内第一个 CCE聚合等级 2的 PDCCH )第二个 CCE对应的信道为第二个 天线端口所使用的信道资源。 例如, 图 6中反馈窗口内第一个 CCE聚合等 级大于等于 2的 PDCCH是 PDCCH 2, 则第一个天线端口所使用的信道资
^PUCCH ^PUCCH
源编号在 到 中选取;第二个天线端口所使用的信道资源编号为
„PUCCH
112 2 , 它是由 PDCCH 2的第二个 CCE指示的。 如果第一个 CCE聚合等级 2的 PDCCH丟失, 则 UE自动使用第二个 CCE聚合等级 2的 PDCCH中 的第二个 CCE所对应的资源编号(例如图 5中选取 PDCCH3 的 CCE2 所对
^PUCCH
应的 n3-2 ) , 以此类推。 如果所有聚合等级 2的?0 01全部丟失, 则 UE回退到单天线发送模式, 只使用信道选择选出来的第一个天线端口对 应的资源编号在一个天线端口上发送实际反馈信息。 本方法最大限度的 节省了 PUCCH资源预留, 并且对 PDCCH的 CCE聚合等级限制较小。
基站端处理流程包括:
如果由 PDCCH检测可靠性即可确定反馈窗口内对应同一 UE的某些 PDCCH的 CCE聚合等级>1 , 则基站不需要做其他的调度限制; 如果由 PDCCH检测可靠性确定反馈窗口内, 同一个 UE的 PDCCH的 CCE聚合等 级都不大于 1,则基站需要通过调度限制其中一个 PDCCH的 CCE聚合等级 =2。 图 6为一个示例, 反馈窗口内 PDCCH 2 和 PDCCH 3的 CCE聚合等级 都等于 2, 各存在两个 CCE与两个资源编号分别绑定; 其他 PDCCH的 CCE 聚合等级都为 1,每个 PDCCH的第一个 CCE都分别绑定一个可用的上行控 制资源编号。 UE端处理流程包括:
步骤 1 , 检测 PDCCH, 根据每个 PDCCH的第一个 CCE 的指示, 获取 所有第一个天线端口可用的信道资源。 并确定某个 CCE的聚合等级大于 等于 2的 PDCCH的第二个 CCE对应的信道为第二个天线端口所使用的信 道资源。 较佳地, 可选择窗口内, 该 UE接收到的第一个 CCE聚合等级 2 的 PDCCH中第二个 CCE所对应的信道资源作为第二个天线端口所使用的 资源。
步骤 2, 接收 PDSCH, 译码后得到 L个 ACK/NACK信息, 其中 L为反 馈窗口的长度。
步骤 3 , UE根据 L个 ACK/NACK所组成的状态, 查表确定实际传输反 馈信息, 并在对应第一个天线端口的所有可用信道资源中选择一个作为 第一个天线端口实际传输所使用的信道资源;
步骤 4, UE同时在两个天线端口所对应的信道资源上通过两个天线端 口传输实际的反馈信息。
基站端接收流程包括:
步骤 1 , 对第一个天线端口所使用的信道资源进行检测, 确定哪个信 道资源上有数据传输, 即可获知选定的信道资源编号。 另外, 进行检测 前,可先将窗口内所有 CCE聚合等级 2的 PDCCH中第二个 CCE所对应的 信道上的信号与所有 PDCCH中第一个 CCE所对应的信道中的信号进行合 并。
步骤 2, 对选定信道资源内所传输的信号进行检测, 获知具体的实际 反馈信息。
步骤 3 , 根据检测到的实际反馈信息及信道资源编号, 查表获知 L个 ACK/NACK的具体状态。 方法 2 : 由网络侧固定分配第二个信道资源:
基站端处理流程包括:
当基站为某 UE配置为 "ACK/NACK复用 +发送分集" 模式时, 基站 将通过高层信令固定配置一个可用的上行控制信道对应第二个天线端 口。 该上行控制信道可被多个用户共享, 基站需要通过调度, 限制共享 同一信道资源的用户终端分时进行上行反馈。
UE端处理流程包括:
步骤 1 , 根据 RRC信令, 获知用于第二个天线端口的信道编号。 步骤 2, 检测 PDCCH, 根据每个 PDCCH的第一个 CCE 的指示, 获知 所有第一个天线端口可用的信道资源。
步骤 3 , 接收 PDSCH, 译码后得到 L个 ACK/NACK信息, 其中 L为反 馈窗口长度。
步骤 4, 根据 L个 ACK/NACK所组成的状态, 查表确定实际传输的反 馈信息, 并在对应第一个天线端口的所有可用信道资源中选择一个作为 第一个天线端口实际传输所使用的信道资源。
步骤 5, 同时在两个天线端口所对应的信道资源上通过两个天线端口 传输实际反馈信息, 实现发送分集。
基站端接收流程包括:
步骤 1 , 对第一个天线端口所使用的信道资源进行检测, 确定哪个信 道资源上有数据传输, 即可获知选定的信道资源编号。 另外, 进行检测 前, 可先将预先配置给该 UE第二个天线端口的信道资源上的信号与所有 PDCCH中第一个 CCE所对应的信道中的信号进行合并。
步骤 2, 对选定信道资源内所传输的信号进行检测, 获知具体的实际 反馈信息。
步骤 3 , 根据检测到的实际反馈信息及信道资源编号, 查表获知 L个 ACK/NACK的具体状态。 对于合并 +发送分集模式, 两个天线端口对应的上行控制信道资源其 中的一个仍可以重用 Rel-8在合并模式下的指示方式, 即动态调度时, 由 反馈窗口内第 M'个 PDCCH的第一个 CCE指示; 持续调度时, 由基站通过 RRC信令预先分配给 UE。 对于另一个天线上的控制信道资源, 本发明的 实施例中也提供了以下两种指示方法: 方法 1 :
第二个信道资源编号仍和 PDCCH的 CCE编号绑定, 也可以分为两种 指示方法:
(指示方法 1 ) : 基站通过调度限定反馈窗口内该 UE的所有 PDCCH 的 CCE聚合等级都不小于 2;这样可以保证反馈窗口内每个 PDCCH都至少 对应着两个上行控制信道资源。
基站端处理过程:基站通过调度限定反馈窗口内该 UE的所有 PDCCH 的 CCE聚合等级= max ( 2, 由 PDCCH检测可靠性确定的聚合等级) 。
UE端处理流程包括:
步骤 1 , 检测 PDCCH, 根据每个 PDCCH中第一个和第二个 CCE的指 示, 获知所有可用的信道资源编号。 根据预先的约定, 选取一个 PDCCH 中第一个和第二个 CCE所对应的信道资源编号作为第一个和第二个天线 端口使用的信道资源; 较优地选取第 M, 个 PDCCH (即 UE实际接收到的 最后一个下行数据包所对应的 PDCCH )上第一个和第二个 CCE所对应的 信道资源编号作为第一和第二个天线端口使用的信道资源。
步骤 2,接收 PDSCH,译码后得到 M, 个 ACK/NACK信息。 将属于同 一用户、 同一码字的 M, 个 ACK/NACK进行逻辑加, 得到 1或 2比特(下 行双码字时)反馈信息。
步骤 3 , UE同时在两个天线端口所对应的信道资源上传输反馈信息, 实现发送分集, 如图 7所示。
基站端接收流程包括:
步骤 1 , 对窗口内的所有可用信道资源进行检测, 确定哪个信道资源 上有数据传输。 另外, 进行检测前, 可先将窗口内所有 PDCCH中第二个 CCE所对应信道中的信号与所有 PDCCH中第一个 CCE所对应信道中的信 号进行合并。
步骤 2, 对检测到的信道上所传输的信号进行检测, 获知具体的反馈 信息。 (指示方法 2 ) : 基站限定反馈窗口内至少存在两个可用的 CCE, 各绑定一个上行控制信道资源。
基站端处理过程: 分为以下两种情况:
情况 1 : L=l : 此时反馈窗口内只有一个 PDCCH, 基站限定该 PDCCH 的 CCE聚合等级 max ( 2, 由 PDCCH检测可靠性确定的聚合等级) 。
情况 2: L> 1 : 基站对反馈窗口内 PDCCH的 CCE聚合等级没有限制, 因为这时反馈窗口内必然存在至少两个可用的 CCE。
UE端处理过程: 分为两种情况:
情况 1 : UE没有接收到任何 CCE或者仅仅接收到一个 CCE, 这时 UE 可以判断出必然有下行数据包丟失, 可不发送任何反馈信息 (即 DTX状 态)或回退到单天线模式进行传输。
情况 2: UE接收到两个及两个以上数量的 CCE。 UE具体处理流程包 括:
步骤 1 , UE检测 PDCCH, 当反馈窗口长度大于 1时,根据每个 PDCCH 中第一个 CCE的指示, 获知反馈窗口内所有可用的信道资源编号, 并根 据预先的约定选取其中的两个, 作为两个天线端口上传输所使用的信道 资源。 考虑到与 Rel-8的兼容性, 可以最优的选取第 M'个 PDCCH的第一个 CCE所对应的编号和与其相邻的一个 CCE所对应的编号, 如图 8所示; 当 反馈窗口长度为 1时, UE将根据反馈窗口内唯一的 PDCCH中第一个和第 二个 CCE的指示, 获取两个信道资源, 作为两个天线端口上传输所使用 的信道资源。
步骤 2, 接收 PDSCH, 译码后得到 M'个 ACK/NACK信息。 将属于同 一用户、 同一码字的 M'个 ACK/NACK进行逻辑加, 得到 1或 2比特(下行 双码字时)反馈信息。
步骤 3 , UE同时在两个天线端口所对应的信道资源上传输反馈信息, 实现发送分集。
基站端接收流程包括:
步骤 1 , 对窗口内的所有可用信道资源进行检测, 确定哪个信道资源 上有数据传输。 若为检测不到任何信号, 即 DTX, 则判断丟包。 步骤 2, 对检测到的信道上所传输的信号进行检测, 获知具体的反馈 信息。 方法 2: 由网络侧固定分配第二个信道资源:
基站端处理过程包括: 当基站为某 UE配置为 "ACK/NACK合并 +发 送分集" 模式时, 基站将通过高层信令固定配置一个可用的上行控制信 道, 对应第二个天线端口。 该上行控制信道可被多个用户共享, 基站需 要通过调度, 限制共享同一信道资源的用户终端分时进行上行反馈。
UE端处理流程包括:
步骤 1 , 根据 RRC信令, 获知用于第二个天线端口的信道编号。 步骤 2, 检测 PDCCH, 根据每个 PDCCH中第一个 CCE的指示, 获知 第一个天线端口对应的所有可用信道资源编号, 并根据预先的约定选择 一个作为第一个天线端口所使用的信道资源, 较优地可以选择第 M'个 PDCCH上第一个 CCE所对应的信道资源编号。
步骤 3 , 接收 PDSCH, 译码后得到 M'个 ACK/NACK信息。 将属于同 一用户、 同一码字的 M'个 ACK/NACK进行逻辑加, 得到 1或 2比特(下行 双码字时)反馈信息。
步骤 4, 同时在两个天线端口所对应的信道资源上传输实际反馈信 息, 实现发送分集。
基站端接收流程包括:
步骤 1 , 对窗口内的所有可用信道资源进行检测, 确定哪个信道资源 上有数据传输。 另外, 进行检测前, 可先将预先配置给该 UE第二个天线 端口的信道上的信号与所有 PDCCH中第一个 CCE所对应的信道中的信号 进行合并。
步骤 2, 对检测到的信道上所传输的信号进行检测, 获知具体的反馈 信息。
通过使用本发明实施例提供的上述方法, 实现了对 ACK/NACK^馈 所使用的信道资源的预留, 且该资源预留的方法支持发送分集, 提高了 上行控制信道传输的可靠性; 且方法简单、 易于实施, 同时适用于 FDD 及 TDD系统, 与 Rel-8系统可以很好的兼容。 本发明的实施例还提供一种实现 ACK/NACK资源预留的系统,包括: 基站, 对于用户终端通过发送分集进行 ACK/NACK 馈时可用的上 行控制信道资源进行配置并通知所述用户终端; 在所述配置的信道资源 组中获取所述用户终端反馈的 ACK/NACK;
用户终端, 用于使用所述基站配置的进行 ACK/NACK^馈所使用的 信道资源, 通过 ACK/NACK复用结合发送分集、 或 ACK/NACK合并结合 发送分集的方式, 传输 ACK/NACK的反馈信息。
具体的, 本发明实施例中的基站的结构示意图如图 9所示, 包括: 配置单元 10, 用于对用户终端通过发送分集进行 ACK/NACK^馈时 可用的信道资源进行配置并通知所述用户终端;
反馈获取单元 20, 用于在所述配置单元配置的信道资源中获取所述 用户终端反馈的 ACK/NACK:。
其中配置单元 10, 具体用于将所述用户终端使用两个天线端口通过 发送分集进行 ACK/NACK^馈时使用两个上行控制信道资源, 每个信道 资源对应一个编号, 每一个天线端口对应一个信道资源, 其中第一个天 线端口对应的可用信道资源编号的指示方式具体为: 对于动态调度的下 行数据包, 所述的每一个可用信道资源编号都与所述的每一个下行数据 包对应的物理下行控制信道 PDCCH所占用的第一个 CCE编号绑定, 即反 馈窗口内每一个下行数据包都对应着一个可用的上行控制信道资源; 对 于持续调度的下行数据包, 可用的信道资源编号由基站通过 RRC信令预 先分配给用户终端。
在第二个信道资源的信道资源编号的指示方式上:
一种可选的实施方式中:
配置单元 10具体用于: 限定反馈窗口内所述用户终端所有 PDCCH的 控制信道单元 CCE的聚合等级至少为 2,且每一个 PDCCH预先约定的两个 CCE对应的两个信道资源编号组成一个资源编号组(考虑到 CCE聚合等 级 , 优选每个 PDCCH的第一个和第二个 CCE对应的信道资源编号组成一 个资源编号组) ;
反馈获取单元 20具体用于: 分别对同一信道资源组内的两个 PUCCH 上的信号进行合并, 之后对所有可用信道资源组进行检测, 获取存在数 据传输的信道资源组; 对信道资源组内所传输的信号进行检测, 获知具 体的反馈信息; 根据检测到的反馈信息及信道资源组的编号, 获取用户 终端反馈的 ACK/NACK:。
另一种可选的实施方式中:
配置单元 10具体用于: 限定反馈窗口内至少有一个 PDCCH的 CCE聚 合等级大于等于 2;
反馈获取单元 20具体用于: 对第一个天线端口所使用的信道资源进 行检测, 确定存在数据传输的信道资源; 检测前, 将窗口内所有 CCE聚 合等级 2的 PDCCH中第二个 CCE所对应的信道上的信号与所有 PDCCH 中第一个 CCE所对应的信道中的信号进行合并; 对存在数据传输的信道 资源内传输的信号进行检测, 获知具体的实际反馈信息; 根据检测到的 实际反馈信息及信道资源编号, 获取用户终端反馈的 ACK/NACK:。
另一种可选的实施方式中:
配置单元 10具体用于: 通过高层信令配置一个信道资源作为第二个 天线端口所使用的信道资源; 所述信道资源可以被小区内多个用户终端 共享, 配置单元 10需要通过配置, 限制共享同一信道资源的用户终端分 时进行上行反馈;
反馈获取单元 20具体用于: 对第一个天线端口所使用的信道资源进 行检测, 确定存在数据传输的信道资源; 检测前, 将预先配置的第二个 天线端口的信道资源上的信号与所有 PDCCH中第一个 CCE所对应的信道 中的信号进行合并; 对所确定的信道资源内所传输的信号进行检测, 获 知具体的实际反馈信息。 根据检测到的实际反馈信息及信道资源编号, 获取用户终端反馈的 ACK/NACK:。
另一种可选的实施方式中: 配置单元 10具体用于: 限定反馈窗口内所有 PDCCH的 CCE聚合等级 至少为 2;
反馈获取单元 20具体用于: 对反馈窗口内的所有可用信道资源进行 检测,确定存在数据传输的信道资源;检测前,将反馈窗口内所有 PDCCH 中第二个 CCE所对应信道中的信号与所有 PDCCH中第一个 CCE所对应信 道中的信号进行合并; 对检测到的信道上所传输的信号进行检测, 获取 所述用户终端反馈的 ACK/NACK:。
另一种可选的实施方式中:
配置单元 10具体用于: 限定反馈窗口内至少存在两个可用的 CCE, 各绑定一个可用的上行控制信道资源; 当反馈窗口长度为 1时, 限定反馈 窗口内唯一的 PDCCH的 CCE的聚合等级至少为 2;
反馈获取单元 20具体用于: 对窗口内的所有可用信道资源进行检测, 确定存在数据传输的信道资源; 如果检测不到任何信号, 则判断丟包; 对确定的信道资源上所传输的信号进行检测, 获取用户终端反馈的 ACK/NACK0
另一种可选的实施方式中:
配置单元 10具体用于: 通过高层信令配置一个信道资源作为第二个 天线端口所使用的信道资源; 所述信道资源可以被小区内多个用户终端 共享, 所述配置单元需要通过配置, 限制共享同一信道资源的用户终端 分时进行上行反馈;
反馈获取单元 20具体用于: 对窗口内的所有可用信道资源进行检 测, 确定存在数据传输的信道资源; 检测前, 可先将预先配置给用户终 端第二个天线端口的信道上的信号与所有 PDCCH中第一个 CCE所对应的 信道中的信号进行合并; 对检测到的信道上所传输的信号进行检测, 获 知用户终端反馈的 ACK/NACK:。 本发明实施例提供的用户终端中, 如图 10所示, 包括:
资源获取单元 50, 用于获取基站配置的进行 ACK/NACK^馈可用的 信道资源; 并确定两个天线端口实际传输所使用的两个信道资源。 反馈单元 60, 用于使用资源获取单元获取的两个实际传输所使用的 信道资源, 通过 ACK/NACK复用结合发送分集、 或 ACK/NACK合并结合 发送分集的方式, 传输 ACK/NACK的反馈信息。
一种可选的实施方式中, 资源获取单元 50具体用于: 检测 PDCCH, 根据每个 PDCCH预先约定的两个 CCE 的指示,获取所有可用的信道资源 组; 接收 PDSCH, 译码后得到 L个 ACK/NACK信息, 其中 L为反馈窗口长 度; 根据 L个 ACK/NACK所组成的状态, 获取实际传输的反馈信息, 并在 所有可用的信道资源组中选择一个作为实际传输所使用的信道资源组, 并获得组成该信道资源组的两个信道资源编号, 分别对应两个天线端口。
反馈单元 60具体用于, 同时在资源获取单元 50获取的信道资源组的 两个信道资源上通过两个天线端口传输实际反馈信息。 一种可选的实施方式中, 资源获取单元 50具体用于: 检测 PDCCH, 根据每个 PDCCH的第一个 CCE 的指示,获取所有第一个天线端口可用的 信道资源,并确定某个 CCE的聚合等级大于等于 2的 PDCCH的第二个 CCE 对应的信道为第二个天线端口所使用的信道资源。 较佳地, 可选择窗口 内, 该 UE接收到的第一个 CCE聚合等级 2的 PDCCH中第二个 CCE所对 应的信道资源作为第二个天线端口所使用的资源; 接收 PDSCH, 译码后 得到 L个 ACK/NACK信息, 其中 L为反馈窗口长度; 根据 L个 ACK/NACK 所组成的状态, 获取实际传输的反馈信息; 并在对应第一个天线端口的 所有可用信道资源中选择一个作为第一个天线端口实际传输所使用的信 道资源;
反馈单元 60具体用于, 同时在资源获取单元 50获取的两个天线端口 对应的信道资源上通过两个天线端口传输实际反馈信息。 一种可选的实施方式中, 资源获取单元 50具体用于: 通过接收到的 高层信令, 获取第二个天线端口所使用的信道资源的信道资源编号; 检 测 PDCCH, 根据每个 PDCCH的第一个 CCE 的指示, 获取所有第一个天 线端口所使用的信道资源; 接收 PDSCH, 译码后得到 L个 ACK/NACK信 息, 其中 L为反馈窗口长度; 根据 L个 ACK/NACK所组成的状态, 获取实 际传输的反馈信息, 并在对应第一个天线端口的所有可用信道资源中选 择一个作为第一个天线端口实际传输所使用的信道资源;
反馈单元 60具体用于, 同时在资源获取单元 50获取的两个天线端口 对应的信道资源上通过两个天线端口传输实际反馈信息。 一种可选的实施方式中, 资源获取单元 50具体用于: 检测 PDCCH, 根据每个 PDCCH中第一个和第二个 CCE的指示, 获知所有可用的信道资 源编号; 并根据预先的约定, 选取一个 PDCCH中第一个和第二个 CCE所 对应的信道资源编号作为第一和第二个天线端口使用的信道资源。 较优 地选取第 M, 个 PDCCH (即 UE实际接收到的最后一个下行数据包所对应 的 PDCCH )上第一个和第二个 CCE所对应的信道资源编号作为第一和第 二个天线端口使用的信道资源; 接收 PDSCH , 译码后得到 M, 个 ACK/NACK信息。 将属于同一用户、 同一码字的 M, 个 ACK/NACK进行 逻辑加, 得到 1或 2比特的反馈信息其中 M, 为用户终端接收到的下行数 据包的个数;
反馈单元 60具体用于, 同时在资源获取单元 50获取的两个天线端口 所对应的信道资源上传输反馈信息, 实现发送分集。 一种可选的实施方式中, 资源获取单元 50具体用于: 当用户终端没 有接收到任何 CCE或者仅仅接收到一个 CCE时, 不发送任何反馈信息或 回退到单天线模式进行传输; 当用户终端接收到两个及两个以上的 CCE 时时: 检测 PDCCH, 当反馈窗口长度大于 1时, 根据每个 PDCCH中第一 个 CCE的指示, 获知反馈窗口内所有可用的信道资源编号, 并根据预先 的约定选取其中的两个, 作为两个天线端口上传输所使用的信道资源。 考虑到与 Rel-8的兼容性,可以最优的选取第 M'个 PDCCH的第一个 CCE所 对应的编号和与其相邻的一个 CCE所对应的编号作为两个天线端口上传 输所使用的信道资源; 当反馈窗口长度为 1时, 所述用户终端将根据反馈 窗口内唯一的 PDCCH中第一个和第二个 CCE的指示,获取两个信道资源, 作为两个天线端口上传输所使用的信道资源; 接收 PDSCH, 译码后得到 M, 个 ACK/NACK信息。将属于同一用户、同一码字的 M, 个 ACK/NACK 进行逻辑加, 得到 1或 2比特反馈信息; 其中 M, 为用户终端接收到的下 行数据包的个数;
反馈单元 60具体用于, 同时在资源获取单元 50获取的两个天线端口 所对应的信道资源上传输反馈信息, 实现发送分集。 一种可选的实施方式中, 资源获取单元 50具体用于: 根据接收到的 高层信令, 获知用于第二个天线端口的信道资源编号; 检测 PDCCH, 根 据每个 PDCCH中第一个 CCE的指示, 获知第一个天线端口对应的所有可 用的信道资源编号, 并根据预先的约定选择一个作为第一个天线端口所 使用的信道资源。 较优地可以选择第 M'个 PDCCH上第一个 CCE所对应的 信道资源编号; 接收 PDSCH, 译码后得到 M, 个 ACK/NACK信息; 将属 于同一用户、 同一码字的 M, 个 ACK/NACK进行逻辑加, 得到 1或 2比特 反馈信息; 其中 M, 为用户终端接收到的下行数据包的个数;
反馈单元 60具体用于, 同时在资源获取单元 50获取的两个天线端口 所对应的信道资源上传输反馈信息, 实现发送分集。
通过使用本发明实施例提供的设备和系统, 实现了对 ACK/NACK^ 馈所使用的信道资源的预留, 且该资源预留的方法支持发送分集, 提高 了上行控制信道传输的可靠性; 且方法简单、 易于实施, 同时适用于 FDD 及 TDD系统, 与 Rel-8系统可以很好的兼容。
通过以上的实施方式的描述, 本领域的技术人员可以清楚地了解到 本发明可以通过硬件实现, 也可以借助软件加必要的通用硬件平台的方 式来实现。 基于这样的理解, 本发明的技术方案可以以软件产品的形式 体现出来, 该软件产品可以存储在一个非易失性存储介质 (可以是 CD-ROM, U盘, 移动硬盘等)中, 包括若干指令用以使得一台计算机设 备(可以是个人计算机, 服务器, 或者网络设备等)执行本发明各个实 施例所述的方法。 本领域技术人员可以理解附图只是一个优选实施例的示意图, 附图 中的单元或流程并不一定是实施本发明所必须的。
本领域技术人员可以理解实施例中的装置中的单元可以按照实施例 描述进行分布于实施例的装置中, 也可以进行相应变化位于不同于本实 施例的一个或多个装置中。 上述实施例的单元可以合并为一个单元, 也 可以进一步拆分成多个子单元。
上述本发明实施例序号仅仅为了描述, 不代表实施例的优劣。

Claims

权利要求
1、 一种 ACK/NACK资源预留的方法, 其特征在于, 包括: 基站对用户终端通过发送分集进行 ACK/NACK反馈时可用的上 行控制信道资源进行配置并通知所述用户终端;
所述基站在所述配置的上行控制信道资源中获取所述用户终端 反馈的 AC謹 ACK:。
2、 如权利要求 1所述的方法, 其特征在于, 还包括:
所述用户终端使用两个天线端口通过发送分集进行 ACK/NACK 反馈时, 需要使用两个上行控制信道资源,每个信道资源对应一个编 号, 每一个天线端口对应一个信道资源编号; 其中第一个天线端口对 应的可用信道资源编号的指示方式具体为:对于动态调度的下行数据 包,每一个可用信道资源编号都与所述每一个下行数据包对应的物理 下行控制信道 PDCCH所占用的第一个控制信道单元 CCE编号绑定; 对于持续调度的下行数据包,所述的可用信道资源编号由所述基站通 过无线资源控制 RRC信令预先分配给用户终端。
3、 如权利要求 1或 2所述的方法, 其特征在于, 所述基站对用 户终端通过发送分集进行 ACK/NACK反馈时可用的上行控制信道资 源进行配置, 包括:
所述基站限定反馈窗口内所述用户终端所有 PDCCH的 CCE的 聚合等级至少为 2,且每一个 PDCCH预先约定的两个 CCE对应的两 个信道资源编号组成一个资源编号组。
4、 如权利要求 3所述的方法, 其特征在于, 所述基站通知所述 用户终端所有的所述可用上行控制信道资源后, 还包括:
所述用户终端检测 PDCCH, 根据每个 PDCCH预先约定的两个 CCE 的指示, 获取所有可用的信道资源组;
所述用户终端接收 PDSCH, 译码后得到 L个 ACK/NACK信息, 其中 L为反馈窗口长度;
所述用户终端根据所述 L个 ACK/NACK所组成的状态, 获取实 际传输的反馈信息,并在所有可用的信道资源组中选择一个作为实际 传输所使用的信道资源组,并获得组成该信道资源组的两个信道资源 编号, 分别对应两个天线端口;
所述用户终端同时在所述获取的信道资源组的两个信道资源上 通过两个天线端口传输所述实际反馈信息。
5、 如权利要求 3所述的方法, 其特征在于, 所述基站在所述配 置的上行控制信道资源中获取所述用户终端反馈的 ACK/NACK, 包 括:
所述基站分别对同一信道资源组内的两个物理上行控制信道 PUCCH上的信号进行合并, 之后对所有可用信道资源组进行检测, 获取存在数据传输的信道资源组;
所述基站对所述信道资源组内所传输的信号进行检测,获知具体 的实际反馈信息;
所述基站根据检测到的实际反馈信息及所述信道资源组的编号, 获取所述用户终端反馈的 ACK/NACK:。
6、 如权利要求 1或 2所述的方法, 其特征在于, 所述基站对用 户终端通过发送分集进行 ACK/NACK反馈时可用的上行控制信道资 源进行配置, 包括:
所述基站限定反馈窗口内至少有一个 PDCCH的 CCE聚合等级 大于等于 2。
7、 如权利要求 6所述的方法, 其特征在于, 所述基站通知所述 用户终端所有的所述可用的上行控制信道资源后, 还包括:
所述用户终端检测 PDCCH,根据每个 PDCCH的第一个 CCE 的 指示, 获取所有第一个天线端口可用的信道资源, 并确定某个 CCE 的聚合等级大于等于 2的 PDCCH的第二个 CCE对应的信道为第二 个天线端口所使用的信道资源;
所述用户终端接收 PDSCH, 译码后得到 L个 ACK/NACK信息, 其中 L为反馈窗口长度; 所述用户终端根据所述 L个 ACK/NACK所组成的状态, 获取实 际传输的反馈信息 ,并在对应第一个天线端口的所有可用信道资源中 选择一个作为第一个天线端口实际传输所使用的信道资源;
所述用户终端同时在两个天线端口对应的信道资源上通过两个 天线端口传输所述实际反馈信息。
8、 如权利要求 3所述的方法, 其特征在于, 所述基站在所述配 置的上行控制信道资源中获取所述用户终端反馈的 ACK/NACK, 包 括:
所述基站对第一个天线端口所使用的信道资源进行检测,确定存 在数据传输的信道资源; 所述检测前, 将窗口内所有 CCE聚合等级
^2的 PDCCH中第二个 CCE所对应的信道上的信号与所有 PDCCH 中第一个 CCE所对应的信道中的信号进行合并;
所述基站对存在数据传输的信道资源内传输的信号进行检测 ,获 知具体的实际反馈信息;
所述基站根据检测到的实际反馈信息及信道资源编号 ,获取所述 用户终端反馈的 ACK/NACK:。
9、 如权利要求 1或 2所述的方法, 其特征在于, 所述基站对用 户终端通过发送分集进行 ACK/NACK反馈时可用的上行控制信道资 源进行配置, 包括:
所述基站通过高层信令配置一个信道资源作为第二个天线端口 所使用的信道资源; 所述信道资源可以被小区内多个用户终端共享, 所述基站需要通过配置,限制共享同一信道资源的用户终端分时进行 上行反馈。
10、 如权利要求 9所述的方法, 其特征在于, 所述基站通知所述 用户终端所有的所述可用的上行控制信道资源后, 还包括:
所述用户终端通过接收到的高层信令,获取第二个天线端口所使 用的信道资源的信道资源编号;
所述用户终端检测 PDCCH,根据每个 PDCCH的第一个 CCE 的 指示, 获取所有第一个天线端口可用的信道资源;
所述用户终端接收 PDSCH, 译码后得到 L个 ACK/NACK信息, 其中 L为反馈窗口长度;
所述用户终端根据所述 L个 ACK/NACK所组成的状态, 获取实 际传输的反馈信息 ,并在对应第一个天线端口的所有可用信道资源中 选择一个作为第一个天线端口实际传输所使用的信道资源;
所述用户终端同时在两个天线端口对应的信道资源上通过两个 天线端口传输所述实际反馈信息。
11、 如权利要求 9所述的方法, 其特征在于, 所述基站在所述配 置的信道资源中获取所述用户终端反馈的 ACK/NACK, 包括:
所述基站对第一个天线端口所使用的信道资源进行检测,确定存 在数据传输的信道资源; 所述检测前, 将预先配置的所述第二个天线 端口的信道资源上的信号与所有 PDCCH中第一个 CCE所对应的信 道中的信号进行合并;
所述基站对所确定的信道资源内所传输的信号进行检测,获知具 体的实际反馈信息。
所述基站根据检测到的实际反馈信息及信道资源编号 ,获取所述 用户终端反馈的 ACK/NACK:。
12、 如权利要求 1或 2所述的方法, 其特征在于, 所述基站对用 户终端通过发送分集进行 ACK/NACK反馈时可用的上行控制信道资 源进行配置, 包括:
所述基站限定反馈窗口内所有 PDCCH的 CCE聚合等级至少为
2。
13、 如权利要求 12所述的方法, 其特征在于, 所述基站通知所 述用户终端所有的所述可用的上行控制信道资源后, 还包括:
所述用户终端检测 PDCCH, 根据每个 PDCCH中第一个和第二 个 CCE的指示, 获知所有可用的信道资源编号; 并根据预先的约定, 选取一个 PDCCH中第一个和第二个 CCE所对应的信道资源编号作 为第一和第二个天线端口使用的信道资源;
所述用户终端接收 PDSCH, 译码后得到 M, 个 ACK/NACK信 息。 将属于同一用户、 同一码字的 M, 个 ACK/NACK进行逻辑加, 得到 1或 2比特的反馈信息;其中 M, 为用户终端接收到的下行数据 包的个数;
所述用户终端同时在两个天线端口所对应的信道资源上传输所 述反馈信息, 实现发送分集。
14、 如权利要求 12所述的方法, 其特征在于, 所述基站在所述 配置的信道资源中获取所述用户终端反馈的 ACK/NACK, 包括: 所述基站对反馈窗口内的所有可用信道资源进行检测,确定存在 数据传输的信道资源; 所述检测前, 将反馈窗口内所有 PDCCH中第 二个 CCE所对应信道中的信号与所有 PDCCH中第一个 CCE所对应 信道中的信号进行合并;
所述基站对检测到的信道上所传输的信号进行检测,获取所述用 户终端反馈的 ACK/NACK:。
15、 如权利要求 1或 2所述的方法, 其特征在于, 所述基站对用 户终端通过发送分集进行 ACK/NACK反馈时可用的上行控制信道资 源进行配置, 包括:
所述基站限定反馈窗口内至少存在两个可用的 CCE,各绑定一个 可用的上行控制信道资源; 当反馈窗口长度为 1时, 限定反馈窗口内 唯一的 PDCCH的 CCE的聚合等级至少为 2。
16、 如权利要求 15所述的方法, 其特征在于, 所述基站通知所 述用户终端所有的所述可用的上行控制信道资源后, 还包括:
当所述用户终端没有接收到任何 CCE或者仅仅接收到一个 CCE 时, 不发送任何反馈信息或回退到单天线模式进行传输;
当所述用户终端接收到两个及两个以上的 CCE时:
所述用户终端检测 PDCCH, 当反馈窗口长度大于 1时, 根据每 个 PDCCH中第一个 CCE的指示, 获知反馈窗口内所有可用的信道 资源编号, 并才艮据预先的约定选取其中的两个, 作为两个天线端口上 传输所使用的信道资源; 当反馈窗口长度为 1时, 所述用户终端将根 据反馈窗口内唯一的 PDCCH中第一个和第二个 CCE的指示, 获取 两个信道资源, 作为两个天线端口上传输所使用的信道资源;
所述用户终端接收 PDSCH, 译码后得到 M, 个 ACK/NACK信 息。 将属于同一用户、 同一码字的 M, 个 ACK/NACK进行逻辑加, 得到 1或 2比特反馈信息;其中 M, 为用户终端接收到的下行数据包 的个数;
所述用户终端同时在两个天线端口所对应的信道资源上传输反 馈信息, 实现发送分集。
17、 如权利要求 15所述的方法, 其特征在于, 所述基站在所述 配置的信道资源中获取所述用户终端反馈的 ACK/NACK, 包括: 所述基站对窗口内的所有可用信道资源进行检测,确定存在数据 传输的信道资源; 如果检测不到任何信号, 则判断丟包;
所述基站对确定的信道资源上所传输的信号进行检测 ,获取所述 用户终端反馈的 ACK/NACK:。
18、 如权利要求 1或 2所述的方法, 其特征在于, 所述基站对用 户终端通过发送分集进行 ACK/NACK反馈时可用的上行控制信道资 源进行配置, 包括:
所述基站通过高层信令配置一个信道资源作为第二个天线端口 所使用的信道资源; 所述信道资源可以被小区内多个用户终端共享, 所述基站需要通过配置,限制共享同一信道资源的用户终端分时进行 上行反馈。
19、 如权利要求 18所述的方法, 其特征在于, 所述基站通知所 述用户终端所有的所述可用的上行控制信道资源后, 还包括:
所述用户终端根据接收到的高层信令,获知用于第二个天线端口 的信道资源编号;
所述用户终端检测 PDCCH, 根据每个 PDCCH中第一个 CCE的 指示, 获知第一个天线端口对应的所有可用信道资源编号, 并根据预 先的约定选择一个作为第一个天线端口所使用的信道资源;
所述用户终端接收 PDSCH, 译码后得到 M, 个 ACK/NACK信 息; 将属于同一用户、 同一码字的 M, 个 ACK/NACK进行逻辑加, 得到 1或 2比特反馈信息;其中 M, 为用户终端接收到的下行数据包 的个数;
所述用户终端同时在两个天线端口所对应的信道资源上传输实 际反馈信息, 实现发送分集。
20、 如权利要求 18所述的方法, 其特征在于, 所述基站在所述 配置的信道资源中获取所述用户终端反馈的 ACK/NACK, 包括: 所述基站对窗口内的所有可用信道资源进行检测,确定存在数据 传输的信道资源; 所述检测前, 可先将预先配置给所述用户终端第二 个天线端口的信道上的信号与所有 PDCCH中第一个 CCE所对应的 信道中的信号进行合并;
所述基站对检测到的信道上所传输的信号进行检测,获知所述用 户终端反馈的 ACK/NACK:。
21、一种实现 ACK/NACK资源预留的系统, 其特征在于, 包括: 基站, 用于对用户终端通过发送分集进行 ACK/NACK反馈时可 用的上行控制信道资源进行配置并通知所述用户终端;在所述配置的 信道资源组中获取所述用户终端反馈的 ACK/NACK;
用户终端,用于使用所述基站指示的信道资源,通过 ACK/NACK 复用结合发送分集、 或 ACK/NACK合并结合发送分集的方式, 传输 ACK/NACK的反馈信息。
22、 一种基站, 其特征在于, 包括:
配置单元, 用于对用户终端通过发送分集进行 ACK/NACK反馈 时可用的上行控制信道资源进行配置并通知所述用户终端;
反馈获取单元,用于在所述配置单元配置的信道资源中获取所述 用户终端反馈的 ACK/NACK:。
23、 如权利要求 22所述的基站, 其特征在于,
所述配置单元,具体用于所述用户终端使用两个天线端口通过发 送分集进行 ACK/NACK反馈时, 需要使用两个上行控制信道资源, 每个信道资源对应一个编号, 每一个天线端口对应一个信道资源编 号; 其中第一个天线端口对应的可用信道资源编号的指示方式具体 为: 对于动态调度的下行数据包, 所述的每一个可用信道资源编号都 与所述的每一个下行数据包对应的物理下行控制信道 PDCCH所占用 的第一个控制信道单元 CCE编号绑定;对于持续调度的下行数据包, 所述的可用信道资源编号由所述基站通过无线资源控制 RRC信令预 先分配给用户终端。
24、 如权利要求 22或 23所述的基站, 其特征在于,
所述配置单元还用于: 限定反馈窗口内所述用户终端所有 PDCCH的控制信道单元 CCE的聚合等级至少为 2,且每一个 PDCCH 的两个 CCE对应的两个信道资源编号组成一个资源编号组;
所述反馈获取单元具体用于: 分别对同一信道资源组内的两个 PUCCH上的信号进行合并, 之后对所有可用信道资源组进行检测, 获取存在数据传输的信道资源组;对所述信道资源组内所传输的信号 进行检测, 获知具体的实际反馈信息; 根据检测到的实际反馈信息及 所述信道资源组的编号, 获取所述用户终端反馈的 ACK/NACK:。
25、 如权利要求 22或 23所述的基站, 其特征在于,
所述配置单元还用于: 限定反馈窗口内至少有一个 PDCCH 的 CCE聚合等级大于等于 2;
所述反馈获取单元具体用于: 对第一个天线端口所使用的信道资 源进行检测, 确定存在数据传输的信道资源; 所述检测前, 将窗口内 所有 CCE聚合等级 2的 PDCCH中第二个 CCE所对应的信道上的 信号与所有 PDCCH中第一个 CCE所对应的信道中的信号进行合并; 对存在数据传输的信道资源内传输的信号进行检测 ,获知具体的实际 反馈信息; 根据检测到的实际反馈信息及信道资源编号, 获取所述用 户终端反馈的 ACK/NACK:。
26、 如权利要求 22或 23所述的基站, 其特征在于,
所述配置单元还用于: 通过高层信令配置一个信道资源作为第二 个天线端口所使用的信道资源;所述信道资源可以被小区内多个用户 终端共享, 所述配置单元需要通过配置, 限制共享同一信道资源的用 户终端分时进行上行反馈;
所述反馈获取单元具体用于: 对第一个天线端口所使用的信道资 源进行检测, 确定存在数据传输的信道资源; 所述检测前, 将预先配 置的所述第二个天线端口的信道资源上的信号与所有 PDCCH中第一 个 CCE所对应的信道中的信号进行合并; 对所确定的信道资源内所 传输的信号进行检测, 获知具体的实际反馈信息; 根据检测到的实际 反馈信息及信道资源编号, 获取所述用户终端反馈的 ACK/NACK:。
27、 如权利要求 22或 23所述的基站, 其特征在于,
所述配置单元还用于: 限定反馈窗口内所有 PDCCH的 CCE聚 合等级至少为 2;
所述反馈获取单元具体用于: 对反馈窗口内的所有可用信道资源 进行检测, 确定存在数据传输的信道资源; 所述检测前, 将反馈窗口 内所有 PDCCH中第二个 CCE所对应信道中的信号与所有 PDCCH中 第一个 CCE所对应信道中的信号进行合并; 对检测到的信道上所传 输的信号进行检测, 获取所述用户终端反馈的 ACK/NACK:。
28、 如权利要求 22或 23所述的基站, 其特征在于,
所述配置单元还用于: 限定反馈窗口内至少存在两个可用的 CCE,各绑定一个可用的上行控制信道资源;当反馈窗口长度为 1时, 限定反馈窗口内唯一的 PDCCH的 CCE的聚合等级至少为 2;
所述反馈获取单元具体用于: 对窗口内的所有可用信道资源进行 检测, 确定存在数据传输的信道资源; 如果检测不到任何信号, 则判 断丟包; 对确定的信道资源上所传输的信号进行检测, 获取所述用户 终端反馈的 AC謹 ACK:。
29、 如权利要求 22或 23所述的基站, 其特征在于,
所述配置单元还用于: 通过高层信令配置一个信道资源作为第二 个天线端口所使用的信道资源;所述信道资源可以被小区内多个用户 终端共享, 所述配置单元需要通过配置, 限制共享同一信道资源的用 户终端分时进行上行反馈;
所述反馈获取单元具体用于: 对窗口内的所有可用信道资源进行 检测, 确定存在数据传输的信道资源; 所述检测前, 可先将预先配置 给所述用户终端第二个天线端口的信道上的信号与所有 PDCCH中第 一个 CCE所对应的信道中的信号进行合并; 对检测到的信道上所传 输的信号进行检测, 获知所述用户终端反馈的 ACK/NACK:。
30、 一种用户终端, 其特征在于, 包括:
资源获取单元, 用于获取基站配置的进行 ACK/NACK反馈可用 的信道资源; 并确定两个天线端口实际传输所使用的两个信道资源; 反馈单元,用于使用所述资源获取单元获取的两个实际传输所使 用的信道资源,通过 ACK/NACK复用结合发送分集、或 ACK/NACK 合并结合发送分集的方式, 传输 ACK/NACK的反馈信息。
31、 如权利要求 30所述的用户终端, 其特征在于,
所述资源获取单元具体用于: 检测 PDCCH, 根据每个 PDCCH 预先约定的两个 CCE 的指示, 获取所有可用的信道资源组; 接收 PDSCH,译码后得到 L个 ACK/NACK信息,其中 L为反馈窗口长度; 根据所述 L个 ACK/NACK所组成的状态,获取实际传输的反馈信息, 并在所有可用的信道资源组中选择一个作为实际传输所使用的信道 资源组, 并获得组成该信道资源组的两个信道资源编号, 分别对应两 个天线端口;
所述反馈单元具体用于, 同时在所述资源获取单元获取的信道资 源组的两个信道资源上通过两个天线端口传输所述实际反馈信息。
32、 如权利要求 30所述的用户终端, 其特征在于,
所述资源获取单元具体用于: 检测 PDCCH, 根据每个 PDCCH 的第一个 CCE 的指示, 获取所有第一个天线端口可用的信道资源, 并确定某个 CCE的聚合等级大于等于 2的 PDCCH的第二个 CCE对 应的信道为第二个天线端口所使用的信道资源; 接收 PDSCH, 译码 后得到 L个 ACK/NACK信息, 其中 L为反馈窗口长度; 根据所述 L 个 ACK/NACK所组成的状态, 获取实际传输的反馈信息; 并在对应 第一个天线端口的所有可用信道资源中选择一个作为第一个天线端 口实际传输所使用的信道资源;
所述反馈单元具体用于, 同时在所述资源获取单元获取的两个天 线端口对应的信道资源上通过两个天线端口传输所述实际反馈信息。
33、 如权利要求 30所述的用户终端, 其特征在于,
所述资源获取单元具体用于: 通过接收到的高层信令, 获取第二 个天线端口所使用的信道资源的信道资源编号; 检测 PDCCH, 根据 每个 PDCCH的第一个 CCE 的指示, 获取所有第一个天线端口所使 用的信道资源; 接收 PDSCH, 译码后得到 L个 ACK/NACK信息, 其中 L为反馈窗口长度; 根据所述 L个 ACK/NACK所组成的状态, 获取实际传输的反馈信息,并在对应第一个天线端口的所有可用信道 资源中选择一个作为第一个天线端口实际传输所使用的信道资源; 所述反馈单元具体用于, 同时在所述资源获取单元获取的两个天 线端口对应的信道资源上通过两个天线端口传输所述实际反馈信息。
34、 如权利要求 30所述的用户终端, 其特征在于,
所述资源获取单元具体用于: 检测 PDCCH, 根据每个 PDCCH 中第一个和第二个 CCE的指示, 获知所有可用的信道资源编号; 并 根据预先的约定, 选取一个 PDCCH中第一个和第二个 CCE所对应 的信道资源编号作为第一个和第二个天线端口使用的信道资源;接收 PDSCH, 译码后得到 M, 个 ACK/NACK信息。 将属于同一用户、 同 一码字的 M, 个 ACK/NACK进行逻辑加,得到 1或 2比特的反馈信 息, 其中 M, 为用户终端接收到的下行数据包的个数;
所述反馈单元具体用于, 同时在所述资源获取单元获取的两个天 线端口所对应的信道资源上传输所述反馈信息, 实现发送分集。
35、 如权利要求 30所述的用户终端, 其特征在于,
所述资源获取单元具体用于: 当所述用户终端没有接收到任何 CCE或者仅仅接收到一个 CCE时, 不发送任何反馈信息或回退到单 天线模式进行传输; 当所述用户终端接收到两个及两个以上的 CCE 时: 检测 PDCCH, 当反馈窗口长度大于 1时, 根据每个 PDCCH中 第一个 CCE的指示, 获知反馈窗口内所有可用的信道资源编号, 并 根据预先的约定选取其中的两个,作为两个天线端口上传输所使用的 信道资源; 当反馈窗口长度为 1时, 所述用户终端将根据反馈窗口内 唯一的 PDCCH中第一个和第二个 CCE的指示, 获取两个信道资源, 作为两个天线端口上传输所使用的信道资源; 接收 PDSCH, 译码后 得到 M, 个 ACK/NACK信息。 将属于同一用户、 同一码字的 M, 个 ACK/NACK进行逻辑加, 得到 1或 2比特反馈信息; 其中 M, 为用 户终端接收到的下行数据包的个数;
所述反馈单元具体用于, 同时在所述资源获取单元获取的两个天 线端口所对应的信道资源上传输所述反馈信息, 实现发送分集。
36、 如权利要求 30所述的用户终端, 其特征在于,
所述资源获取单元具体用于: 根据接收到的高层信令, 获知用于 第二个天线端口的信道资源编号; 检测 PDCCH, 根据每个 PDCCH 中第一个 CCE的指示, 获知第一个天线端口对应的所有可用信道资 源编号,并根据预先的约定选择一个作为第一个天线端口所使用的信 道资源; 接收 PDSCH, 译码后得到 M, 个 ACK/NACK信息; 将属 于同一用户、 同一码字的 M, 个 ACK/NACK进行逻辑加, 得到 1或 2比特反馈信息; 其中 M, 为用户终端接收到的下行数据包的个数; 所述反馈单元具体用于, 同时在所述资源获取单元获取的两个天 线端口所对应的信道资源上传输所述反馈信息, 实现发送分集。
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