WO2013143378A1 - 一种harq反馈的实现方法、上行子帧分配方法及装置 - Google Patents
一种harq反馈的实现方法、上行子帧分配方法及装置 Download PDFInfo
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- WO2013143378A1 WO2013143378A1 PCT/CN2013/072238 CN2013072238W WO2013143378A1 WO 2013143378 A1 WO2013143378 A1 WO 2013143378A1 CN 2013072238 W CN2013072238 W CN 2013072238W WO 2013143378 A1 WO2013143378 A1 WO 2013143378A1
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- uplink
- downlink
- subframe
- tdd
- ack
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1829—Arrangements specially adapted for the receiver end
- H04L1/1861—Physical mapping arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
Definitions
- the present invention relates to the field of communications, and in particular, to a method for implementing HARQ feedback, an uplink subframe allocation method, and a device. Background technique
- LTE Long Term Evolution
- FDD Frequency Division Duplex
- H-FDD Half FDD
- TDD Time Division Duplex
- the FDD means that the uplink transmission and the downlink transmission are performed on different carrier frequency bands, allowing the base station and the terminal (User Equipment, UE) to simultaneously perform signal reception and signal transmission; TDD means that the uplink transmission and the downlink transmission are on the same carrier frequency band. Performing, allowing the base station and the terminal to perform signal transmission/signal reception, or signal reception/signal transmission, respectively, in different time periods.
- the peak rate of the system is greatly improved compared with the LTE system, and it is required to achieve downlink 1 Gbps and uplink 500 Mbps. If only one carrier with a maximum bandwidth of 20 MHz is used, the peak rate requirement cannot be achieved. Therefore, the LTE-A system needs to expand the bandwidth that the terminal can use, thereby introducing Carrier Aggregation (CA) technology, which is to aggregate multiple consecutive or discontinuous carriers under the same base station (eNB), Serve the terminal to provide the required rate. These aggregated carriers are also referred to as component carriers (CCs). Each cell can be a member carrier, and cells (member carriers) under different eNBs cannot be aggregated.
- CA Carrier Aggregation
- each carrier does not exceed 20 MHz at most, as shown in FIG. 2 .
- both the FDD mode and the TDD mode have a radio frame length of 10 ms, and the length of one subframe is lms.
- seven TDD uplink and downlink configurations are defined, as shown in Table 1, where D represents a downlink (DL) sub-frame, U represents an uplink (UL) subframe, and S represents a special TDD system. Subframe.
- Table 1 (TDD uplink and downlink configuration)
- the terminal receives downlink data in the subframe n-4, and in the uplink subframe n, feedbacks whether the data in the downlink subframe needs to be retransmitted. That is, feedback correct/error (ACK/NACK) information, also referred to as Physical Downlink Shared Channel Hybrid Automatic Repeat reQuest (PDSCH HARQ) feedback.
- ACK/NACK feedback correct/error
- PDSCH HARQ Physical Downlink Shared Channel Hybrid Automatic Repeat reQuest
- the UE may feed back ACK/NACK information corresponding to multiple downlink subframes in the same uplink subframe, that is, the UE detects the physical downlink shared channel (Physical Downlink Shared Channel, PDSCH) in the downlink subframe nk.
- PDSCH Physical Downlink Shared Channel
- the M downlink or the physical downlink control channel (PDCCH) indicating the downlink semi-persistent scheduling release, and the corresponding ACK/NACK information is fed back in the uplink subframe n, where keK, the value of the set K and the TDD of the system
- the uplink and downlink configurations are related to the specific subframe number, as shown in Table 2; in particular, for the special subframe configuration 0 and 5 under the regular Cyclic Prefix (CP), and the special subframe configuration under the extended CP. 0 and 4, the special subframe has no ACK/NACK feedback, that is, the terminal does not feed back ACK/NACK information for the special subframe.
- Table 2 (100 downlink correlation values: : ⁇ : , ⁇ , '" ⁇ _ 1 ⁇ ) Table 2 reflects the PDSCH HARQ feedback timing relationship of the TDD uplink and downlink configuration indication.
- the embodiments of the present invention provide a method for implementing HARQ feedback, an uplink subframe allocation method, and a device, which are used to smoothly implement HARQ feedback when carrier aggregation is performed across systems.
- An uplink subframe allocation method for hybrid automatic repeat request HARQ feedback includes:
- the subframes are such that the number of FDD downlink subframes corresponding to the ACK/NACK information carried by each uplink subframe indicated by the TDD uplink and downlink reference configuration is approximately equal.
- a method for implementing hybrid automatic repeat request HARQ feedback including:
- the ACK/NACK information corresponding to the FDD downlink subframe is carried in the corresponding uplink subframe according to the ACK/NACK information corresponding to the FDD downlink subframe that is carried by the uplink subframe in the TDD uplink and downlink reference configuration. Feedback.
- a method for implementing hybrid automatic repeat request HARQ feedback including:
- the ACK/NACK information corresponding to the FDD downlink subframe that is carried in the uplink subframe is received according to the ACK/NACK information corresponding to the FDD downlink subframe that is carried in the uplink subframe that is determined by the TDD uplink and downlink reference configuration.
- An apparatus for allocating an uplink subframe for mixing automatic retransmission request HARQ feedback includes:
- a first determining unit configured to determine a time division duplex TDD uplink and downlink reference configuration used when performing physical downlink shared channel PDSCH HARQ feedback for the frequency division duplex FDD downlink carrier; a second determining unit, configured to allocate an ACK carried by the uplink subframe to an uplink subframe indicated by the TDD uplink and downlink reference configuration according to the number of uplink subframes indicated by the TDD uplink and downlink reference configuration in one radio frame.
- the FDD downlink subframe corresponding to the NACK information is such that the number of FDD downlink subframes corresponding to the ACK/NACK information carried by each uplink subframe indicated by the TDD uplink and downlink reference configuration is approximately equal.
- a hybrid automatic repeat request HARQ feedback implementation device including:
- a third determining unit configured to determine, according to a result of the FDD downlink subframe allocated by the second determining unit in the foregoing allocation device, the ACK/NACK information corresponding to the FDD downlink subframe carried by the uplink subframe of the TDD uplink and downlink reference configuration indication;
- a communication unit configured to carry, according to the ACK/NACK information corresponding to the FDD downlink subframe that is carried by the uplink subframe of the TDD uplink and downlink reference configuration, the ACK/NACK information corresponding to the FDD downlink subframe in the corresponding uplink sub- Feedback is made in the frame.
- a device for implementing hybrid automatic repeat request HARQ feedback comprising:
- a third determining unit configured to determine, according to a result of the FDD downlink subframe allocated by the second determining unit in the foregoing determining device, the ACK/NACK information corresponding to the FDD downlink subframe carried by the uplink subframe in the TDD uplink and downlink reference configuration indication; a unit, configured to receive, according to the determined ACK/NACK information corresponding to the FDD downlink subframe of the uplink subframe that is received by the TDD uplink and downlink reference configuration, the ACK corresponding to the FDD downlink subframe that is carried in the uplink subframe. NACK information.
- a PDSCH HARQ feedback scheme is redesigned, specifically: when the terminal performs PDSCH HARQ feedback for the FDD downlink carrier.
- the TDD uplink and downlink reference configuration used according to the number of uplink subframes indicated by the determined TDD uplink and downlink reference configuration in one radio frame, allocates ACK/NACK corresponding to the FDD downlink subframe for the uplink subframe indicated by the TDD uplink and downlink reference configuration.
- the information is such that the number of FDD downlink subframes corresponding to the ACK/NACK information carried by the uplink subframes of the TDD uplink and downlink reference configuration is approximately equal, and the ACK/NACK information allocated to the uplink subframes is fed back, and corresponding
- the base station also receives the ACK/NACK information fed back by the terminal side in the same manner. In this way, the terminal can timely and accurately feed back the ACK/NACK information corresponding to the downlink data to the base station, so that the base station can perform accurate data retransmission according to the obtained ACK/NACK information, thereby effectively ensuring system performance.
- the ACK/NACK information is allocated to the TDD uplink subframe as uniformly as possible by the allocation method provided by the embodiment of the present invention, so that the resource allocation in the system is more balanced.
- FIG. 1 is a schematic diagram of carrier distribution of an LTE system in the prior art
- FIG. 2 is a schematic diagram of a CA technology download wave distribution of the LTE-A system in the prior art
- FIG. 3 is a flowchart of allocating an FDD downlink subframe to an uplink subframe used for HARQ feedback according to an embodiment of the present invention
- FIG. 3 is a flowchart of a method for allocating ACK/N ACK information corresponding to an FDD downlink subframe for an uplink subframe indicated by an TDD uplink and downlink reference configuration according to an embodiment of the present disclosure
- FIG. 4 to FIG. 10 are diagrams showing HARQ feedback timing relationships corresponding to downlink subframes of FDD carriers in various TDD uplink and downlink reference configurations according to an embodiment of the present invention
- FIG. 11 is a flowchart of a method for a terminal to perform HARQ feedback according to an embodiment of the present invention
- FIG. 12 is a flowchart of a method for performing HARQ feedback by a base station according to an embodiment of the present invention
- FIG. 13 is a schematic structural diagram of a first terminal in an embodiment of the present invention.
- FIG. 14 is a schematic structural diagram of a second terminal according to an embodiment of the present invention.
- FIG. 15 is a schematic structural diagram of a first base station according to an embodiment of the present invention.
- FIG. 16 is a schematic structural diagram of a function of a second base station according to an embodiment of the present invention. detailed description
- a new HARQ feedback scheme is designed.
- the subframe on the FDD downlink carrier ie, the FDD downlink
- the ACK/NACK information corresponding to the subframe is uniformly allocated to the uplink subframe for carrying the HARQ feedback information in the TDD carrier, so that the resource allocation of the system is more balanced.
- the TDD carrier is used as the primary carrier and the FDD downlink carrier is aggregated, that is, when the PDSCH HARQ feedback is performed on the FDD downlink carrier, the corresponding ACK/NACK information can only be in the primary carrier (ie, the TDD carrier). Transfer on, then, see Figure 3,
- Step 300 Determine a TDD uplink and downlink reference configuration used for performing PDSCH HARQ feedback on the FDD downlink carrier, that is, determine an uplink subframe that can be used to carry ACK/NACK information corresponding to the FDD downlink carrier on the TDD carrier.
- the "TDD uplink and downlink reference configuration used for PDSCH HARQ feedback for the FDD downlink carrier” is referred to as the "TDD uplink and downlink reference configuration corresponding to the FDD carrier", and may be further referred to as a "TDD uplink and downlink reference configuration".
- TDD uplink and downlink reference configuration is referred to as the "TDD uplink and downlink reference configuration corresponding to the FDD carrier.
- the TDD uplink and downlink reference configuration may be one of the seven configuration indications supported by the LTE TDD system. For details, refer to FIG. 1 , but not limited thereto. Specifically:
- the TDD uplink and downlink configuration actually used on the TDD carrier can be determined as the TDD uplink and downlink reference configuration; the TDD uplink and downlink configuration configured for the PDSCH HARQ feedback on the TDD carrier can be determined as the TDD uplink and downlink reference configuration (this configuration may be related to the TDD carrier)
- the uplink and downlink configurations of the TDD that are actually used are different.
- the TDD uplink and downlink configuration of the TDD uplink and downlink configuration is also determined by the high-level signaling.
- the frame is a subset of all uplink subframes included on the primary carrier; Determining a TDD uplink and downlink configuration confirmed in a predetermined manner as a TDD uplink and downlink reference configuration, for example: always agreeing that the TDD uplink and downlink reference configuration is TDD uplink and downlink configuration 5; or, when the TDD carrier is configured with a 5 ms switching point configuration
- the TDD uplink and downlink reference configuration is configured as the TDD uplink and downlink configuration 2; when the TDD carrier is configured with the 10 ms switching point configuration, the TDD uplink and downlink reference configuration is configured as the reference configuration as the TDD uplink and downlink configuration 5.
- Step 310 According to the number of uplink subframes indicated by the TDD uplink and downlink reference configuration in a radio frame, the uplink subframe allocated by the TDD uplink and downlink reference configuration is allocated by the ACK/NACK information carried by the uplink subframe.
- the FDD downlink subframes are such that the number of FDD downlink subframes corresponding to the ACK/NACK information carried by each uplink subframe indicated by the TDD uplink and downlink reference configuration is approximately equal.
- the number of FDD downlink subframes corresponding to the ACK/NACK information carried in each uplink subframe is approximately equal, that is, the number of FDD downlink subframes corresponding to the ACK/NACK information carried in each uplink subframe does not exceed the agreed value, or each uplink sub-
- the number of FDD downlink subframes corresponding to the ACK/NACK information carried by the frame is completely equal.
- An FDD downlink subframe corresponds to an uplink subframe in a unique TDD carrier.
- the FDD downlink subframe m is before the FDD downlink subframe n
- the uplink subframe m′ of the TDD carrier corresponding to the FDD downlink subframe m is before the uplink subframe n′ of the TDD carrier corresponding to the FDD downlink subframe n.
- the FDD downlink subframe m and the FDD downlink subframe n correspond to the uplink subframe of the same TDD carrier.
- the uplink subframe of the TDD carrier corresponding to the FDD downlink subframe refers to the ACK corresponding to the FDD downlink subframe.
- Uplink subframe in the TDD carrier of the /NACK message is the uplink subframe in the TDD carrier of the /NACK message.
- a radio frame of a TDD carrier a has X groups of consecutive uplink subframe groups, where X is the number of consecutive uplink subframe groups in a radio frame, in each group of consecutive uplink subframe groups:
- Each uplink subframe in the uplink subframe can carry a maximum of 1 () / ⁇ ⁇ on the mo carrier, and the ACK/NACK information corresponding to the downlink subframes ;
- Each of the remaining N uplink subframes may carry ACK/NACK information corresponding to consecutive L 1Q/A ⁇ downlink subframes on the FDD carrier;
- the last uplink subframe n carries the FDD downlink subframe n-4 and the previous " 1 Q / A ⁇ , _ 1 (the uplink subframe n corresponds to consecutive " 1Q/A ⁇ 1 FDD downlink subframes") FDD ACK/NACK information corresponding to the downlink subframe, or the last uplink subframe n carries the FDD downlink subframe n-4 and before 1 (the uplink subframe n corresponds to consecutive L 1Q/A ⁇ " FDD downlink subframes) ACK/NACK information corresponding to the FDD downlink subframes; then, according to each uplink subframe, a maximum FDD downlink subframe can be carried
- ⁇ represents the number of uplink subframes in a radio frame a
- a preferred implementation of the step 310 is as shown in FIG. 3a, including:
- Step 311 Determine that one uplink subframe in the uplink subframe indicated by the TDD uplink and downlink reference configuration in one radio frame corresponds to “ 1 Q / A ⁇ , and the FDD corresponding to the ACK/NACK information carried by the uplink subframe.
- Determining a first portion of an uplink subframe of the radio frame consecutive uplink sub-frame group is configured by the TDD uplink and downlink reference indication uplink subframe included in the frame corresponds to I ', UL 1 th ACK / NACK information of the uplink subframe carried The corresponding FDD downlink subframe;
- the number of uplink subframes in the first part is ⁇ ⁇ ! ⁇ / ⁇
- step 312 determining an uplink subframe of the radio frame reference configuration indicated by the TDD uplink and downlink in the uplink subframe v ⁇ corresponding to L 1Q / V "th uplink sub frames carried by the the ACK / NACK information corresponding to the FDD downlink subframe, the total number of FDD downlink subframe two N N i ess a radio frame is configured by the TDD uplink and downlink indicated by reference ⁇ uplink subframe corresponding to 10.
- step 312 further includes:
- Determining, in the radio frame, the second partial uplink subframe in the consecutive uplink subframe group in the uplink subframe indicated by the TDD uplink and downlink reference configuration corresponds to L 1Q/A ⁇ ACK/NACK carried by the uplink subframe
- the FDD downlink subframe corresponding to the information
- the number of uplink subframes in the second part is N , and the sum of N less and N ⁇ or is the upper part of the continuous uplink subframe group.
- the first part of the uplink subframe is the first to the second uplink subframe in the continuous uplink subframe group, and the second uplink subframe is the uplink subframe of the first uplink subframe of the continuous uplink subframe group. frame.
- Step 313 Allocating an FDD downlink subframe n to the last uplink subframe n in the ith consecutive uplink subframe group for the ith consecutive uplink subframe group in the radio frame a indicated by the TDD uplink and downlink reference configuration. -4 and consecutive L lw "" of the downlink subframe n-4 - 1 FDD downlink subframe corresponding to the ACK/NACK information carried by the uplink subframe.
- the ACK/NACK information corresponding to the FDD downlink subframe 5 is allocated.
- Step 314 According to the descending order of the TDD uplink subframe and the descending order of the FDD downlink subframe, allocate consecutive and unallocated L 1Q/A ⁇ ′ each of the uplink subframes before the uplink subframe n by the uplink subframe.
- FDD downlinks corresponding to ACK/NACK information carried by the uplink subframe are respectively allocated for consecutive ⁇ ⁇ 1 uplink subframes before the uplink subframe n
- the frame is then allocated consecutive and unallocated " 1Q/A ⁇ , FDD downlink subframes corresponding to the ACK/NACK information carried by the uplink subframe for consecutive N uplink subframes.
- the uplink subframe n indicated by the TDD uplink and downlink reference configuration corresponds to the ACK/NACK information of the FDD downlink subframe n-k. H , where,
- TDD uplink and downlink reference corresponding to the FDD carrier is configured as TDD uplink and downlink configuration 0
- TDD uplink and downlink reference corresponding to the FDD carrier is configured as the TDD uplink and downlink configuration 1
- TDD uplink and downlink reference corresponding to the FDD carrier is configured as the TDD uplink and downlink configuration 2
- TDD uplink and downlink reference corresponding to the FDD carrier is configured as TDD uplink and downlink configuration 4.
- TDD uplink and downlink reference corresponding to the FDD carrier is configured as TDD uplink and downlink configuration 5.
- TDD uplink and downlink reference corresponding to the FDD carrier is configured as TDD uplink and downlink configuration 6.
- Step 400 The terminal allocates the FDD downlink subframe to the TDD uplink subframe according to the method provided by any of the foregoing embodiments, and determines the ACK/NACK information corresponding to the FDD downlink subframe carried by the uplink subframe indicated by the TDD uplink and downlink reference configuration.
- Step 410 The terminal carries the ACK/NACK information corresponding to the FDD downlink subframe in the corresponding uplink subframe according to the ACK/NACK information corresponding to the FDD downlink subframe carried by the uplink subframe indicated by the determined TDD uplink and downlink reference configuration. Feedback.
- the base station also needs to determine the ACK/NACK information allocation manner of the uplink subframe and the ACK/NACK information fed back by the receiving terminal according to the corresponding manner.
- the detailed process of implementing the HARQ feedback by the base station is as follows:
- Step 1300 The base station allocates the FDD downlink subframe according to the method provided by any of the foregoing embodiments, and determines the FDD downlink subframe carried by the uplink subframe indicated by the TDD uplink and downlink reference configuration.
- Step 1310 The FDD downlink subcarrier carried by the eNodeB according to the determined TDD uplink and downlink reference configuration indication
- the ACK/NACK information corresponding to the frame receives the ACK/NACK information corresponding to the foregoing FDD downlink subframe that is carried in the uplink subframe.
- N sub h j f mme'c is the feedback in the uplink subframe on carrier c
- the number of downlink subframes of the ACK-ACK information is the above embodiment, referring to FIG. 13 to FIG. 14, in the embodiment of the present invention,
- the terminal includes a first determining unit 140 and a second determining unit 141, where
- a first determining unit 140 configured to determine a TDD uplink and downlink reference configuration used when performing PDSCH HARQ feedback on the FDD downlink carrier;
- the second determining unit 141 is configured to allocate, according to the number of uplink subframes indicated by the TDD uplink and downlink reference configuration in the radio frame, the ACK/NACK carried by the uplink subframe for the uplink subframe indicated by the TDD uplink and downlink reference configuration.
- the FDD downlink subframe corresponding to the information is such that the number of FDD downlink subframes allocated for each uplink subframe indicated by the TDD uplink and downlink reference configuration is approximately equal.
- the terminal includes a third determining unit 142, configured to determine, according to the result of the FDD downlink subframe allocated by the second determining unit 141, the ACK/NACK information corresponding to the FDD downlink subframe carried by the uplink subframe indicated by the TDD uplink and downlink reference configuration.
- the terminal further includes a communication unit 143, configured to ACK/NACK corresponding to the FDD downlink subframe according to the ACK/NACK information corresponding to the FDD downlink subframe carried by the uplink subframe 7
- the base station includes a first determining unit 150 and a second determining unit 151, where the first determining unit 150 is configured to determine a TDD used by the terminal side to perform PDSCH HARQ feedback on the FDD downlink carrier.
- Row reference configuration the first determining unit 150 is configured to determine a TDD used by the terminal side to perform PDSCH HARQ feedback on the FDD downlink carrier.
- the second determining unit 151 is configured to allocate an ACK carried by the uplink subframe to the uplink subframe indicated by the TDD uplink and downlink reference configuration according to the number of uplink subframes indicated by the TDD uplink and downlink reference configuration in one radio frame.
- the FDD downlink subframe corresponding to the /NACK information is such that the number of FDD downlink subframes corresponding to the ACK/NACK information carried by each uplink subframe indicated by the TDD uplink and downlink reference configuration is approximately equal.
- the base station includes a third determining unit 152, configured to determine, according to the result of the FDD downlink subframe allocated by the second determining unit 151, the ACK/NACK information corresponding to the FDD downlink subframe carried by the uplink subframe indicated by the TDD uplink and downlink reference configuration.
- the base station further includes a communication unit 153, configured to receive the FDD downlink that is carried in the uplink subframe according to the ACK/NACK information corresponding to the FDD downlink subframe carried by the uplink subframe indicated by the TDD uplink and downlink reference configuration. The ACK/NACK information corresponding to the subframe.
- the application scenario of the TDD carrier as the primary carrier is described as an example.
- the present invention The technical solution provided by the embodiment is also applicable to the application scenario where the FDD carrier is the primary carrier, and the application scenario that is applicable to only the FDD carrier in the system, that is, only a part of the uplink subframe is limited to be used for transmitting the ACK/NACK information in the FDD uplink carrier. , will not repeat them here.
- a PDSCH HARQ feedback scheme is redesigned, specifically: when the terminal performs PDSCH HARQ feedback for the FDD downlink carrier.
- the TDD uplink and downlink reference configuration used according to the number of uplink subframes indicated by the determined TDD uplink and downlink reference configuration in one radio frame, allocates ACK/NACK corresponding to the FDD downlink subframe for the uplink subframe indicated by the TDD uplink and downlink reference configuration.
- the information is such that the number of FDD downlink subframes corresponding to the ACK/NACK information carried by the uplink subframes of the TDD uplink and downlink reference configuration is approximately equal, and the ACK/NACK information allocated to the uplink subframes is fed back, and corresponding
- the base station also receives the ACK/NACK information fed back by the terminal side in the same manner. In this way, the terminal can timely and accurately feed back the ACK/NACK information corresponding to the downlink data to the base station, so that the base station can perform accurate data retransmission according to the obtained ACK/NACK information, thereby effectively ensuring system performance.
- the ACK/NACK information is allocated to the TDD uplink subframe as uniformly as possible by the allocation method provided by the embodiment of the present invention, so that the resource allocation in the system is more balanced.
- embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the present invention can be embodied in the form of a computer program product embodied on one or more computer-usable storage interfaces (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer usable program code.
- computer-usable storage interfaces including but not limited to disk storage, CD-ROM, optical storage, etc.
- the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
- the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
- These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
- the instructions are provided for implementing one or more processes and/or block diagrams in the flowchart The steps of the function specified in the box or in multiple boxes.
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Abstract
本申请公开了一种HARQ反馈的实现方法、上行子帧分配方法及装置,其方法为:确定针对FDD PDSCH HARQ反馈时所使用的TDD上下行参考配置;根据一个无线帧中由所述TDD上下行参考配置指示的上行子帧数量,为所述TDD上下行参考配置指示的上行子帧分配由该上行子帧承载的正确/错误ACK/NACK信息所对应的FDD下行子帧,使得所述TDD上下行参考配置指示的各个上行子帧承载的ACK/NACK信息对应的FDD下行子帧数近似相等。这样,可以及时、准确反馈下行数据对应的ACK/NACK信息,从而执行准确的数据重传,进而有效保证了***性能。
Description
一种 HARO反馈的实现方法、 上行子帧分配方法及装置 本申请要求在 2012年 03月 26 日提交中国专利局、 申请号为 201210082993.2、 发明 名称为 "一种 HARQ反馈的实现方法、上行子帧分配方法及装置"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
本发明涉及通信领域, 特别涉及一种 HARQ反馈的实现方法、上行子帧分配方法及装 置。 背景技术
目前, 长期演进(Long Term Evolution, LTE ) ***支持三种双工方式, 分别为频分双 工( Frequency Division Duplex, FDD )、半频分双工( Half FDD, H-FDD )和时分双工( Time Division Duplex, TDD )。
其中, FDD 是指上行传输和下行传输在不同的载波频段上进行, 允许基站和终端 ( User Equipment, UE ) 同时进行信号接收和信号发送; TDD是指上行传输和下行传输在 相同的载波频段上进行, 允许基站和终端分别在不同的时间段进行信号发送 /信号接收, 或 者, 信号接收 /信号发送。
在 LTE及之前的无线通信***中, 一个小区中只配置有一个载波, 在 LTE***中最 大带宽为 20MHz, 具体如图 1所示。
在长期演进升级(Long Term Evolution- Advanced, LTE-A ) ***中, ***的峰值速率 比 LTE***有巨大的提高, 要求达到下行 lGbps, 上行 500Mbps。 如果只使用一个最大带 宽为 20MHz的载波是无法达到峰值速率要求的。 因此, LTE-A***需要扩展终端可以使 用的带宽, 由此引入了载波聚合(Carrier Aggregation, CA )技术, 即将同一个基站(eNB ) 下的多个连续或不连续的载波聚合在一起, 同时为终端服务, 以提供所需的速率。 这些聚 合在一起的载波又称为成员载波(component carrier, CC )。 每个小区都可以是一个成员载 波, 不同 eNB下的小区(成员载波)不能聚合。 为了保证 LTE***的 UE能在每一个聚合 的载波下工作, 每一个载波最大不超过 20MHz, 具体如图 2所示。 在图 2中所示的 LTE-A 的基站下有 4个可以聚合的载波, 基站可以同时在 4个载波上和终端进行数据传输, 以提 高***吞吐量。
在 LTE***中, FDD模式和 TDD模式都是一个无线帧的长度为 10ms,—个子帧的长 度为 lms。对于每个 TDD模式的无线帧, 定义了七种 TDD上下行配置, 具体如表 1所示, 其中 D代表下行( DL )子桢, U代表上行( UL )子帧, S代表 TDD***的特殊子帧。
表 1 ( TDD上下行配置) 在 LTE***的 FDD模式下, 终端在子帧 n-4中接收下行数据, 在上行子帧 n中反馈 该下行子帧上的数据是否需要重传的信令, 即反馈正确 /错误( ACK/NACK )信息, 也称 为物理下行共享信道物理混合自动重传请求 (Physical Downlink Shared Channel Hybrid Automatic Repeat reQuest, PDSCH HARQ )反馈。 在载波聚合时, 子帧 n-4中多个下行载 波对应的 ACK/NACK信息将同时在主载波的上行子帧 n中反馈。
在 LTE ***的 TDD模式下, UE可能在同一个上行子帧反馈多个下行子帧所对应的 ACK/NACK信息, 即 UE在下行子帧 n-k 中检测物理下行共享信道(Physical Downlink Shared Channel, PDSCH M专输或者指示下行半持续调度释放的物理下行控制信道( Physical Downlink Control Channel, PDCCH ), 在上行子帧 n中反馈对应的 ACK/NACK信息, 其中 keK,集合 K的取值与***的 TDD上下行配置及具体的子帧编号有关,具体如表 2所示; 其中, 特别的, 对于常规循环前缀(Cyclic Prefix, CP )下特殊子帧配置 0和 5 , 以及扩展 CP下特殊子帧配置 0和 4, 特殊子帧无 ACK/NACK反馈, 即终端不针对特殊子帧反馈 ACK/NACK信息。
表 2 ( 100下行相关 值::^: ,^,'"^_1} )
表 2反映了 TDD上下行配置指示的 PDSCH HARQ反馈时序关系。 在 LTE***中, 多个无线帧顺序排列, 表 2只以一个无线帧为例给出了每个上行子帧所对应的 K的情况, 其中 n-k<0则表示倒数第 k个下行子帧位于前一无线帧, 例如, n=2, k=6时, 无线帧 a中 的上行子帧 2承载无线帧 a-1中的下行子帧 6对应的 ACK/NACK信息。
然而, 目前还没有 LTE***中支持跨***载波聚合的实现方案, 进而也没有 TDD系 统和 FDD***进行载波聚合时下行数据的 HARQ反馈方案。 发明内容
本发明实施例提供一种 HARQ反馈的实现方法、上行子帧分配方法及装置, 用以在跨 ***进行载波聚合时, 顺利实现 HARQ反馈。
本发明实施例提供的具体技术方案如下:
一种用于混合自动重传请求 HARQ反馈的上行子帧的分配方法, 包括:
确定针对频分双工 FDD下行载波进行物理下行共享信道 PDSCH HARQ反馈时所使用 的时分双工 TDD上下行参考配置;
根据一个无线帧中由所述 TDD上下行参考配置指示的上行子帧数量, 为所述 TDD上 下行参考配置指示的上行子帧分配由该上行子帧承载的 ACK/NACK信息所对应的 FDD下 行子帧,使得所述 TDD上下行参考配置指示的各个上行子帧承载的 ACK/NACK信息对应 的 FDD下行子帧数近似相等。
一种混合自动重传请求 HARQ反馈的实现方法, 包括:
根据上述的方法分配 FDD下行子帧的结果, 确定时分双工 TDD上下行参考配置指示 的上行子帧承载的频分双工 FDD下行子帧对应的 ACK/NACK信息;
根据确定的所述 TDD上下行参考配置指示的上行子帧承载的 FDD 下行子帧对应的 ACK/NACK信息, 将所述 FDD下行子帧对应的 ACK/NACK信息承载在对应的上行子帧 中进行反馈。
一种混合自动重传请求 HARQ反馈的实现方法, 包括:
根据上述的方法分配 FDD下行子帧的结果, 确定时分双工 TDD上下行参考配置指示 的上行子帧承载的频分双工 FDD下行子帧对应的 ACK/NACK信息;
根据确定的所述 TDD上下行参考配置指示的上行子帧承载的 FDD 下行子帧对应的 ACK/NACK信息,接收承载在上行子帧中的所述 FDD下行子帧对应的 ACK/NACK信息。
一种用于混合自动重传请求 HARQ反馈的上行子帧的分配装置, 包括:
第一确定单元, 用于确定针对频分双工 FDD下行载波进行物理下行共享信道 PDSCH HARQ反馈时所使用的时分双工 TDD上下行参考配置;
第二确定单元, 用于根据一个无线帧中由所述 TDD上下行参考配置指示的上行子帧 数量, 为所述 TDD上下行参考配置指示的上行子帧分配由该上行子帧承载的 ACK/NACK 信息所对应的 FDD下行子帧, 使得所述 TDD上下行参考配置指示的各个上行子帧承载的 ACK/NACK信息对应的 FDD下行子帧数近似相等。
—种混合自动重传请求 HARQ反馈的实现装置, 包括:
第三确定单元, 用于根据权上述分配装置中的第二确定单元分配 FDD 下行子帧的结 果, 确定 TDD上下行参考配置指示的上行子帧承载的 FDD下行子帧对应的 ACK/NACK 信息;
通信单元, 用于根据所述 TDD上下行参考配置指示的上行子帧承载的 FDD下行子帧 对应的 ACK/NACK信息, 将所述 FDD下行子帧对应的 ACK/NACK信息承载在对应的上 行子帧中进行反馈。
一种混合自动重传请求 HARQ反馈的实现装置, 包括:
第三确定单元, 用于根据上述分配装置中的第二确定单元分配 FDD下行子帧的结果, 确定 TDD上下行参考配置指示的上行子帧承载的 FDD下行子帧对应的 ACK/NACK信息; 通信单元, 用于根据确定的所述 TDD上下行参考配置指示的上行子帧承载的 FDD下 行子帧对应的 ACK/NACK信息, 接收承载在上行子帧中的所述 FDD 下行子帧对应的 ACK/NACK信息。
综上所述, 本发明实施例中, 在 TDD载波与 FDD DL载波聚合的应用场景下, 重新 设计了一种 PDSCH HARQ反馈方案, 具体为: 终端基于确定的针对 FDD下行载波进行 PDSCH HARQ反馈时所使用的 TDD上下行参考配置, 根据一个无线帧中由确定的 TDD 上下行参考配置指示的上行子帧数量, 为 TDD上下行参考配置指示的上行子帧分配 FDD 下行子帧对应的 ACK/NACK信息,使得该 TDD上下行参考配置指示的各个上行子帧承载 的 ACK/NACK信息对应的 FDD下行子帧数近似相等,进而在各个上行子帧上反馈为其分 配的 ACK/NACK信息,相应的,基站也按照相同方式接收终端侧反馈的 ACK/NACK信息。 这样, 终端可以及时、 准确地向基站反馈下行数据对应的 ACK/NACK信息, 从而令基站 可以根据获得的 ACK/NACK信息进行准确的数据重传, 进而有效保证了***性能。 另夕卜, 通过本发明实施例提供的分配方法,将 ACK/NACK信息尽可能均匀地分配给 TDD上行子 帧, 以使***中的资源分配更加均衡。 附图说明
图 1为现有技术下 LTE***载波分布示意图;
图 2为现有技术下 LTE-A*** CA技术下载波分布示意图;
图 3为本发明实施例中对用于 HARQ反馈的上行子帧分配 FDD下行子帧的流程图;
图 3a为本发明实施例中为 TDD上下行参考配置指示的上行子帧分配 FDD下行子帧 对应的 ACK/N ACK信息的方法流程图;
图 4〜图 10为本发明实施例中各种 TDD上下行参考配置下, FDD载波下行子帧对应 的 HARQ反馈时序关系;
图 11为本发明实施例中终端进行 HARQ反馈的方法流程图;
图 12为本发明实施例中基站进行 HARQ反馈的方法流程图;
图 13为本发明实施例中第一个终端功能结构示意图;
图 14为本发明实施例中第二个终端功能结构示意图;
图 15为本发明实施例中第一个基站功能结构示意图;
图 16为本发明实施例中第二个基站功能结构示意图。 具体实施方式
针对跨***进行载波聚合的应用场景, 本发明实施例中,设计了一种新的 HARQ反馈 方案,通过本发明实施例提供的 HARQ反馈方案,可以将 FDD下行载波上的子帧(即 FDD 下行子帧)对应的 ACK/NACK信息均匀的分配给 TDD载波中用于承载 HARQ反馈信息 的上行子帧, 以使得***的资源分配更均衡。
下面结合附图对本发明优选的实施方式进行详细说明。
本发明实施例中, 较佳的, 将 TDD载波作为主载波与 FDD下行载波进行聚合, 即针 对 FDD下行载波进行 PDSCH HARQ反馈时, 相应的 ACK/NACK信息只能在主载波(即 TDD载波)上进行传输, 那么, 参阅图 3所示,
用于 PDSCH HARQ反馈的上行子帧分配方法的详细流程如下:
步骤 300: 确定针对 FDD下行载波进行 PDSCH HARQ反馈时所使用的 TDD上下行 参考配置, 即确定在 TDD载波上可以用于承载 FDD下行载波对应的 ACK/NACK信息的 上行子帧。 为了便于描述, 后续实施例中, 将 "针对 FDD下行载波进行 PDSCH HARQ反 馈时所使用的 TDD上下行参考配置" 筒称为 "FDD载波对应的 TDD上下行参考配置", 也可进一步筒称为 "TDD上下行参考配置"。
本实施例中,较优的, TDD上下行参考配置可以是 LTE TDD***所支持的七种配置 指示的一种, 具体参阅图 1所示, 但不限于此。 具体为:
可以将 TDD载波上实际使用的 TDD上下行配置确定为 TDD上下行参考配置; 可以 将 TDD载波上针对 PDSCH HARQ反馈所配置的 TDD上下行配置确定为 TDD 上下行 参考配置 (此配置可能与 TDD载波上实际使用的 TDD上下行配置不同); 也可以将网络 侧高层信令通知的一个 TDD上下行配置确定为 TDD上下行参考配置, 其中, 高层信令通 知的 TDD上下行配置包含的所有上行子帧为主载波上包含的所有上行子帧的子集; 还可
以将按照预定方式确认的一个 TDD上下行配置确定为 TDD上下行参考配置, 例如: 总是 约定 TDD上下行参考配置为 TDD上下行配置 5; 或, 当 TDD载波上釆用 5ms切换点配 置时, 约定 TDD上下行参考配置为 TDD上下行配置 2; 当 TDD载波上釆用 10ms切换点 配置时, 约定 TDD上下行参考配置为参考配置为 TDD上下行配置 5。
步骤 310: 根据一个无线帧中由上述的 TDD上下行参考配置指示的上行子帧数量, 为 上述的 TDD上下行参考配置指示的上行子帧分配由该上行子帧承载的 ACK/NACK信息所 对应的 FDD 下行子帧, 使得该 TDD 上下行参考配置指示的各个上行子帧承载的 ACK/NACK信息对应的 FDD下行子帧数近似相等。
各个上行子帧承载的 ACK/NACK信息对应的 FDD下行子帧数近似相等是指,各个上 行子帧承载的 ACK/NACK信息对应的 FDD下行子帧数相差不超过约定值, 或者, 各个上 行子帧承载的 ACK/NACK信息对应的 FDD下行子帧数完全相等。
为了使得所述 TDD上下行参考配置指示的各个上行子帧承载的 ACK/NACK信息对应 的 FDD下行子帧数近似相等, 本发明实施例给出了如下的分配规则:
规则 1 : 一个 FDD下行子帧对应唯一的一个 TDD载波中的上行子帧。
规则 2: 任一 FDD下行子帧 m对应的 ACK/NACK信息由 TDD载波中 m+3之后的上 行子帧承载反馈。
规则 3 : FDD下行子帧 m在 FDD下行子帧 n之前, 则 FDD下行子帧 m对应的 TDD 载波的上行子帧 m'在 FDD下行子帧 n对应的 TDD载波的上行子帧 n'之前, 或者, FDD 下行子帧 m和 FDD下行子帧 n对应的是同一个 TDD载波的上行子帧; 其中, FDD下行 子帧对应的 TDD载波的上行子帧是指 ,承载 FDD下行子帧对应的 ACK/NACK信息的 TDD 载波中的上行子帧。
规则 4: TDD载波的一个无线帧 a中有 X组连续上行子帧组, 其中 X为一个无线帧中 的连续上行子帧组数, 在每组连续上行子帧组中:
。re =「mGd(10,Nra)/ ^个上行子帧中的每个上行子帧最大可承载 mo 载波上连续 的「1 () / Λ ^,个下行子帧所对应的 ACK/NACK信息;
剩余的 N 上行子帧中的每个上行子帧最大可承载 FDD载波上连续的 L1Q/A^」个下 行子帧所对应的 ACK/NACK信息;
最后一个上行子帧 n承载 FDD下行子帧 n-4及之前的「1 Q / A^,_ 1个(该上行子帧 n 对应连续的「1Q/A^1个 FDD下行子帧时) FDD下行子帧对应的 ACK/NACK信息, 或, 最后一个上行子帧 n承载 FDD下行子帧 n-4及之前的
1 (该上行子帧 n对应连 续的 L1Q/A^」个 FDD下行子帧时)个 FDD下行子帧对应的 ACK/NACK信息; 然后根据 每个上行子帧最大可承载连续的 FDD下行子帧数, 按顺序可确定上行子帧"— z', = 1,2,'" 所对应的连续 FDD下行子帧, 此时要保证连续的上行子帧所对应的下行子帧也是连续的。
其中, m、 n表示子帧编号, ^^表示一个无线帧 a中上行子帧的数量, N"^" ^ N 之和表示无线帧 a中第 i组连续的上行子帧的数量, i=l , ... ... x
按照上述分配规则, 本发明实施例中, 步骤 310 的一种优选的具体实现方式如图 3a 所示, 包括:
步骤 311 :确定一个无线帧中由上述 TDD上下行参考配置指示的上行子帧中的 个 上行子帧对应「1 Q / A ^,个由该上行子帧承载的 ACK/NACK信息所对应的 FDD下行子帧, 优选的, WM。re = mOd(10,Nffi)。 其中, 步骤 311进一步包括:
确定该无线帧中由上述 TDD上下行参考配置指示的上行子帧所包含的连续上行子帧 组中的第一部分上行子帧对应 I ' 、UL 1个由该上行子帧承载的 ACK/NACK信息所对应的 FDD下行子帧;
x-l
「 N = Y N
第一部分上行子帧的个数为^ ^!^^^^^/^, 且 步骤 312:确定该无线帧中由上述 TDD上下行参考配置指示的上行子帧中的 Ν^个上 行子帧对应 L1Q/ V 」个由该上行子帧承载的 ACK/NACK信息所对应的 FDD下行子帧, Niess 二 N 一个无线帧中由所述 TDD上下行参考配置指示的^^个上行子帧对 应的 FDD下行子帧总数为 10。
其中, 步骤 312进一步包括:
确定该无线帧中由上述 TDD上下行参考配置指示的上行子帧中的连续上行子帧组中 的第二部分上行子帧对应 L1Q/A^」个由该上行子帧承载的 ACK/NACK信息所对应的 FDD 下行子帧;
第二部分上行子帧的个数为 N , Nless 与 N< or 之和为该连续上行子帧组中包含的上
x-l
^ less 〉: ^ less
行子帧数量, 且 。 优选的, 第一部分上行子帧为连续上行子帧组中的第 1〜第 丽 个上行子帧, 第二部 分上行子帧为该连续上行子帧组中第一部分上行子帧后的 个上行子帧。
步骤 313: 针对上述的 TDD上下行参考配置指示的无线帧 a中的第 i组连续上行子帧 组, 为第 i组连续上行子帧组中的最后一个上行子帧 n分配 FDD下行子帧 n-4及该下行子 帧 n-4之前连续的 Ll w " 」_ 1个由该上行子帧承载的 ACK/NACK信息所对应的 FDD下 行子帧。
例如, 参考图 4所示, 假设 TDD上下行参考配置为 TDD上下行配置 0, 则 TDD的无 线帧 a中有 NuL =6个上行子帧, 有 x=2组连续上行子帧组, 第 i=2组中最后一个上行子帧
n=9,对应的 FDD下行子帧为下行子帧 5及之前 L1Q/A^」_1=0个下行子帧,按照步骤 313 的方法,为 TDD上下行配置 0指示的该上行子帧 9分配 FDD下行子帧 5对应的 ACK/NACK 信息。
步骤 314: 按照 TDD上行子帧的降序和 FDD下行子帧的降序 , 为上行子帧 n之前的 各个上行子帧分别分配连续且未被分配的 L1Q/A^」个由该上行子帧承载的 ACK/NACK信 息所对应的 FDD下行子帧, 或者, 分配连续且未被分配的「1Q/A ^,个由该上行子帧承载 的 ACK/NACK信息所对应的 FDD下行子帧。
其中, 首先为上行子帧 n之前连续的 Ν ~ 1个上行子帧分别分配连续且未被分配的 L1Q/A^」个由该上行子帧承载的 ACK/NACK信息所对应的 FDD下行子帧, 然后为连续 的 N 个上行子帧分别分配连续且未被分配的「1Q/A ^,个由该上行子帧承载的 ACK/NACK信息所对应的 FDD下行子帧。
例如, 参考图 4所示, 假设 TDD上下行参考配置为 TDD上下行配置 0, 则 TDD的无 线帧 a中有 NuL =6个上行子帧, 有 x=2组连续的上行子帧, 第 i=2组中有连续的 3个上行 子帧 (即 N 与 Νι 之和为 3 ) , N
Νι =ι, 则在按照步骤 313为上行子帧 9分配了 ACK/NACK信息后, 为上行子帧 8分配 FDD下行子帧 4和下行 子帧 3的 ACK/NACK信息。
下面针对具体的应用场景对上述流程结果详细说明。
在 TDD 上下行参考配置指示的上行子帧 n上, 对应承载 FDD 下行子帧 n-k 的 ACK/NACK信息。 H , 其中,
1 )若 FDD载波对应的 TDD上下行参考配置为 TDD上下行配置 0
N醫 =4 , Nless =2 , 「 , = 2, Ll。/NJ = l
则 n = 2 7时, K={6,5}, η = 3 8时, Κ={5,4}, η=4 9时, Κ={4}, 具体如图 4所 示。
或者,
2 )若 FDD载波对应的 TDD上下行参考配置为 TDD上下行配置 1
U , Nless =2 , 「 , = 3 , Ll。/NJ = 2 则 n = 2 7时, K={7,6,5 }, η = 3 8时, Κ={5,4}, 具体如图 5所示。
或者,
3 )若 FDD载波对应的 TDD上下行参考配置为 TDD上下行配置 2
Nkss =2 , Ll0 」 = 5
则 n = 2 7时, K={8,7,6,5,4}, 具体如图 6所示。
或者,
4 )若 FDD载波对应的 TDD上下行参考配置为 TDD上下行配置 3
N e= , Nless=2, 「10/N„J = 4, Ll0/ 」 = 3。 则 n = 2时, K={11, 10,9,8}, n = 3 时, K={8,7,6}, n = 4时, K={6,5,4}, 具体如图 7 所示。
或者,
5 )若 FDD载波对应的 TDD上下行参考配置为 TDD上下行配置 4。
U , Nkss=2, Ll0 」 = 5。 则 n = 2时, K={12,11, 10,9.8}, η = 3时, Κ={8,7,6,5,4} , 具体如图 8所示。
或者,
6 )若 FDD载波对应的 TDD上下行参考配置为 TDD上下行配置 5。
N =0, Nkss=\, Ll0 」 = 10。 则 n = 2时, K={13, 12,11, 10,9.8,7,6,5,4}, 具体如图 9所示。
或者,
7 )若 FDD载波对应的 TDD上下行参考配置为 TDD上下行配置 6。
U , Nkss=5 , Ll0 」 = 2。 则 n=2时, K={7,6}, η=3、 7时, Κ={6,5}, η=4、 8时, Κ={5,4}, 具体如图 10所示。 其中, 集合 Κ内的各元素顺序可以改变, n_k<0时的处理方式参见表 2相关描述, 在此不再赘述。
基于本发明上述实施例提供的分配方法, 参考图 11所示, 终端进行 HARQ反馈的实 现方法的详细流程如下:
步骤 400: 终端根据上述任意实施例提供的方法, 为 TDD上行子帧分配 FDD下行子 帧的结果, 确定 TDD 上下行参考配置指示的上行子帧承载的 FDD 下行子帧对应的 ACK/NACK信息。
步骤 410: 终端根据确定的 TDD上下行参考配置指示的上行子帧承载的 FDD下行子 帧对应的 ACK/NACK信息, 将该 FDD下行子帧对应的 ACK/NACK信息承载在对应的上 行子帧中反馈。 相应的, 本发明实施例中, 基站也需要按照相应的方式确定上行子帧的 ACK/NACK 信息分配方式, 以及接收终端反馈的 ACK/NACK信息。
基于本发明上述实施例提供的分配方法, 参考图 12所示, 基站进行 HARQ反馈的实 现方法的详细流程如下:
步骤 1300:基站根据上述任意实施例提供的方法分配 FDD下行子帧的结果,确定 TDD 上下行参考配置指示的上行子帧承载的 FDD下行子帧。
步骤 1310:基站根据确定的 TDD上下行参考配置指示的上行子帧承载的 FDD下行子
帧对应的 ACK/NACK信息, 接收承载在上行子帧中的上述的 FDD 下行子帧对应的 ACK/NACK信息。
C-1
N v ACK/NACK - V /V v subframe,c 对于同一个上行子帧承载的 ACK/NACK比特数目 c=o , 其 中 N sub hjfmme'c为载波 c上在该上行子帧中反馈 ACK-ACK信息的下行子帧数目。 基于上述实施例, 参阅图 13〜图 14所示, 本发明实施例中,
终端包括第一确定单元 140、 第二确定单元 141 , 其中,
第一确定单元 140 , 用于确定针对 FDD下行载波进行 PDSCH HARQ反馈时所使用的 TDD上下行参考配置;
第二确定单元 141 ,用于根据一个无线帧中由上述 TDD上下行参考配置指示的上行子 帧数量, 为该 TDD上下行参考配置指示的上行子帧分配由该上行子帧承载的 ACK/NACK 信息所对应的 FDD下行子帧, 使得为该 TDD上下行参考配置指示的各个上行子帧分配的 FDD下行子帧数近似相等。
另外, 终端包括第三确定单元 142, 用于根据第二确定单元 141分配 FDD下行子帧的 结果,确定 TDD上下行参考配置指示的上行子帧承载的 FDD下行子帧对应的 ACK/NACK 信息。 相应的, 终端还包括通信单元 143 , 用于根据上述 TDD上下行参考配置指示的上行 子帧 7|载的 FDD下行子帧对应的 ACK/NACK信息 ,将该 FDD下行子帧对应的 ACK/NACK 信息承载在对应的上行子帧中进行反馈。
参阅图 15〜图 16所示, 基站包括第一确定单元 150、 第二确定单元 151 , 其中, 第一确定单元 150, 用于确定终端侧针对 FDD下行载波进行 PDSCH HARQ反馈时所 使用的 TDD上下行参考配置;
第二确定单元 151 ,用于根据一个无线帧中由所述 TDD上下行参考配置指示的上行子 帧数量, 为所述 TDD 上下行参考配置指示的上行子帧分配由该上行子帧承载的 ACK/NACK信息所对应的 FDD下行子帧, 使得所述 TDD上下行参考配置指示的各个上 行子帧承载的 ACK/NACK信息对应的 FDD下行子帧数近似相等。
另外, 基站包括第三确定单元 152, 用于根据第二确定单元 151分配 FDD下行子帧的 结果,确定 TDD上下行参考配置指示的上行子帧承载的 FDD下行子帧对应的 ACK/NACK 信息。 相应的, 基站还包括通信单元 153 , 用于根据确定的上述 TDD上下行参考配置指示 的上行子帧承载的 FDD下行子帧对应的 ACK/NACK信息, 接收承载在上行子帧中的该 FDD下行子帧对应的 ACK/NACK信息。
上述实施例仅以 TDD载波为主载波的应用场景为例进行说明。 实际应用中, 本发明
实施例提供的技术方案也同样适用于 FDD 载波为主载波的应用场景, 以及适用于***中 只有 FDD 载波的应用场景, 即在 FDD 上行载波中限定只有部分上行子帧可用于传输 ACK/NACK信息, 在此不再赘述。
综上所述, 本发明实施例中, 在 TDD载波与 FDD DL载波聚合的应用场景下, 重新 设计了一种 PDSCH HARQ反馈方案, 具体为: 终端基于确定的针对 FDD下行载波进行 PDSCH HARQ反馈时所使用的 TDD上下行参考配置, 根据一个无线帧中由确定的 TDD 上下行参考配置指示的上行子帧数量, 为 TDD上下行参考配置指示的上行子帧分配 FDD 下行子帧对应的 ACK/NACK信息,使得该 TDD上下行参考配置指示的各个上行子帧承载 的 ACK/NACK信息对应的 FDD下行子帧数近似相等,进而在各个上行子帧上反馈为其分 配的 ACK/NACK信息,相应的,基站也按照相同方式接收终端侧反馈的 ACK/NACK信息。 这样, 终端可以及时、 准确地向基站反馈下行数据对应的 ACK/NACK信息, 从而令基站 可以根据获得的 ACK/NACK信息进行准确的数据重传, 进而有效保证了***性能。 另夕卜, 通过本发明实施例提供的分配方法,将 ACK/NACK信息尽可能均匀地分配给 TDD上行子 帧, 以使***中的资源分配更加均衡。
本领域内的技术人员应明白, 本发明的实施例可提供为方法、 ***、 或计算机程序产 品。 因此, 本发明可釆用完全硬件实施例、 完全软件实施例、 或结合软件和硬件方面的实 施例的形式。 而且, 本发明可釆用在一个或多个其中包含有计算机可用程序代码的计算机 可用存储介盾 (包括但不限于磁盘存储器、 CD-ROM、 光学存储器等)上实施的计算机程 序产品的形式。
本发明是参照根据本发明实施例的方法、 设备(***)、 和计算机程序产品的流程图 和 /或方框图来描述的。 应理解可由计算机程序指令实现流程图和 /或方框图中的每一流 程和 /或方框、 以及流程图和 /或方框图中的流程和 /或方框的结合。 可提供这些计算机 程序指令到通用计算机、 专用计算机、 嵌入式处理机或其他可编程数据处理设备的处理器 以产生一个机器, 使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用 于实现在流程图一个流程或多个流程和 /或方框图一个方框或多个方框中指定的功能的 装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方 式工作的计算机可读存储器中, 使得存储在该计算机可读存储器中的指令产生包括指令装 置的制造品, 该指令装置实现在流程图一个流程或多个流程和 /或方框图一个方框或多个 方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上, 使得在计算机 或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理, 从而在计算机或其他 可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和 /或方框图一个
方框或多个方框中指定的功能的步骤。
尽管已描述了本发明的优选实施例, 但本领域内的技术人员一旦得知了基本创造性概 念, 则可对这些实施例作出另外的变更和修改。 所以, 所附权利要求意欲解释为包括优选 实施例以及落入本发明范围的所有变更和修改。
显然, 本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和 范围。这样,倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内, 则本发明也意图包含这些改动和变型在内。
Claims
1、 一种用于混合自动重传请求 HARQ反馈的上行子帧的分配方法, 其特征在于, 包 括:
确定针对频分双工 FDD下行载波进行物理下行共享信道 PDSCH HARQ反馈时所使用 的时分双工 TDD上下行参考配置;
根据一个无线帧中由所述 TDD上下行参考配置指示的上行子帧数量, 为所述 TDD上 下行参考配置指示的上行子帧分配由该上行子帧承载的正确 /错误 ACK/NACK信息所对应 的 FDD下行子帧,使得所述 TDD上下行参考配置指示的各个上行子帧承载的 ACK/NACK 信息对应的 FDD下行子帧数近似相等。
2、 如权利要求 1所述的方法, 其特征在于, 根据一个无线帧中由所述 TDD上下行参 考配置指示的上行子帧数量, 为所述 TDD上下行参考配置指示的上行子帧分配由该上行 子帧承载的 ACK/NACK信息所对应的 FDD下行子帧, 具体包括:
为一个无线帧中由所述 TDD上下行参考配置指示的上行子帧中的 个上行子帧分 别分配「1 Q / A ^,个由该上行子帧承载的 ACK/NACK信息所对应的 FDD下行子帧;
为所述无线帧中由所述 TDD上下行参考配置指示的上行子帧中的 Ν^个上行子帧分 别分配 L1Q/ V 」个由该上行子帧承载的 ACK/NACK信息所对应的 FDD下行子帧;
其中, A ^为一个无线帧中由所述 TDD 上下行参考配置指示的上行子帧数量, mod(10, NUL ) , Nless = NUL - Nmore , 一个无线帧中由所述 TDD 上下行参考配置 指示的 A ^个上行子帧对应的 FDD下行子帧总数为 10
3、 如权利要求 2所述的方法, 其特征在于, 为一个无线帧中由所述 TDD上下行参考 配置指示的上行子帧中的 Nm。re个上行子帧分别分配「1 Q / A ^,个由该上行子帧承载的
ACK/NACK信息所对应的 FDD下行子帧, 进一步包括:
为所述无线帧中由所述 TDD上下行参考配置指示的上行子帧所包含的连续上行子帧 组中的第一部分上行子帧分别分配 ^ Q 7 ^,个由该上行子帧承载的 ACK/NACK信息所对 应的 FDD 下行子帧, 所述无线帧中所有连续上行子帧组的第一部分上行子帧数量之和为 N more ·
为所述无线帧中由所述 TDD上下行参考配置指示的上行子帧中的 个上行子帧分 别分配 L1Q/ V 」个由该上行子帧承载的 ACK/NACK信息所对应的 FDD下行子帧, 进一 步包括:
为所述无线帧中由所述 TDD上下行参考配置指示的上行子帧中的连续上行子帧组中 的第二部分上行子帧分别分配 L1Q/A^」个由该上行子帧承载的 ACK/NACK信息所对应的
FDD下行子帧,所述无线帧中所有连续上行子帧组的第二部分上行子帧数量之和为 Nless。
4、 如权利要求 1~3任一项所述的方法, 其特征在于, 根据一个无线帧中由所述 TDD
上下行参考配置指示的上行子帧数量, 为所述 TDD上下行参考配置指示的上行子帧分配 由该上行子帧承载的 ACK/NACK信息所对应的 FDD下行子帧, 具体包括:
为所述 TDD 上下行参考配置指示的上行子帧 n 分配 FDD 下行子帧 n-k对应的 ACK/NACK信息, k G K, 其中,
若所述 TDD上下行参考配置为 TDD上下行配置 0, 则 n = 2、 7时, K={6,5} , η = 3、
8时, Κ={5,4} , η=4、 9时, Κ={4};
或者,
若所述 TDD上下行参考配置为 TDD上下行配置 1 ,则 n = 2、 7时, K={7,6,5 } , η = 3、 8时, Κ={5,4};
或者,
若所述 TDD上下行参考配置为 TDD上下行配置 2, 则 n = 2、 7时, K={8,7,6,5,4}; 或者,
若所述 TDD上下行参考配置为 TDD上下行配置 3 , 则 η = 2时, Κ={ 11, 10,9,8} , η = 3时, Κ={8,7,6} , η = 4时, Κ={6,5,4};
或者,
若所述 TDD上下行参考配置为 TDD上下行配置 4, 则 n = 2时, K={ 12,11, 10,9.8} , η = 3时, Κ={8,7,6,5,4};
或者,
若所述 TDD 上下行参考配置为 TDD 上下行配置 5 , 则 η = 2 时, Κ={ 13, 12,11, 10,9.8,7,6,5,4};
或者,
若所述 TDD上下行参考配置为 TDD上下行配置 6, 则 η=2时, Κ={7,6} , η=3、 7时, Κ={6,5} , η=4、 8时, Κ={5,4}。
5、 一种基于权利要求 1~4任意一项所述方法的混合自动重传请求 HARQ反馈的实现 方法, 其特征在于, 包括:
根据分配 FDD下行子帧的结果, 确定时分双工 TDD上下行参考配置指示的上行子帧 载的频分双工 FDD下行子帧对应的 ACK/NACK信息;
根据确定的所述 TDD上下行参考配置指示的上行子帧承载的 FDD 下行子帧对应的 ACK/NACK信息, 将所述 FDD下行子帧对应的 ACK/NACK信息承载在对应的上行子帧 中进行反馈。
6、 一种基于权利要求 1~4任意一项所述方法的混合自动重传请求 HARQ反馈的实现 方法, 其特征在于, 包括:
根据分配 FDD下行子帧的结果, 确定时分双工 TDD上下行参考配置指示的上行子帧
载的频分双工 FDD下行子帧对应的 ACK/NACK信息;
根据确定的所述 TDD上下行参考配置指示的上行子帧承载的 FDD 下行子帧对应的 ACK/NACK信息,接收承载在上行子帧中的所述 FDD下行子帧对应的 ACK/NACK信息。
7、 一种用于混合自动重传请求 HARQ反馈的上行子帧的分配装置, 其特征在于, 包 括:
第一确定单元, 用于确定针对频分双工 FDD下行载波进行物理下行共享信道 PDSCH HARQ反馈时所使用的时分双工 TDD上下行参考配置;
第二确定单元, 用于根据一个无线帧中由所述 TDD上下行参考配置指示的上行子帧 数量, 为所述 TDD 上下行参考配置指示的上行子帧分配由该上行子帧承载的正确 /错误 ACK/NACK信息所对应的 FDD下行子帧, 使得所述 TDD上下行参考配置指示的各个上 行子帧承载的 ACK/NACK信息对应的 FDD下行子帧数近似相等。
8、 如权利要求 7所述的装置, 其特征在于, 所述第二确定单元具体用于:
为一个无线帧中由所述 TDD上下行参考配置指示的上行子帧中的 个上行子帧分 别分配「1 Q / A ^,个由该上行子帧承载的 ACK/NACK信息所对应的 FDD下行子帧;
为所述无线帧中由所述 TDD上下行参考配置指示的上行子帧中的 个上行子帧分 别分配 L1Q/ V 」个由该上行子帧承载的 ACK/NACK信息所对应的 FDD下行子帧;
其中, A ^为一个无线帧中由所述 TDD 上下行参考配置指示的上行子帧数量, lOmodN^ , Nless = -Nmore , 一个无线帧中由所述 TDD上下行参考配置指 示的^ ^个上行子帧对应的 FDD下行子帧总数为 10
9、 如权利要求 8所述的装置, 其特征在于, 所述第二确定单元进一步用于: 为所述无线帧中由所述 TDD上下行参考配置指示的上行子帧所包含的连续上行子帧 组中的第一部分上行子帧分别分配 ^ Q 7 ^,个由该上行子帧承载的 ACK/NACK信息所对 应的 FDD 下行子帧, 所述无线帧中所有连续上行子帧组的第一部分上行子帧数量之和为 N more ·
为所述无线帧中由所述 TDD上下行参考配置指示的上行子帧中的连续上行子帧组中 的第二部分上行子帧分别分配 ίι υ / 」个由该上行子帧承载的 ACK/NACK信息所对应的 FDD下行子帧,所述无线帧中所有连续上行子帧组的第二部分上行子帧数量之和为 Nless。
10、 如权利要求 7~9任一项所述的装置, 其特征在于, 所述第二确定单元具体用于: 为所述 TDD 上下行参考配置指示的上行子帧 n 分配 FDD 下行子帧 n-k对应的 ACK/NACK信息, k G K, 其中,
若所述 TDD上下行参考配置为 TDD上下行配置 0, 则 n = 2 7时, K={6,5} , η = 3 8时, Κ={5,4} , η=4 9时, Κ={4};
或者,
若所述 TDD上下行参考配置为 TDD上下行配置 1 ,则 n = 2、 7时, K={7,6,5 } , η = 3、 8时, Κ={5,4};
或者,
若所述 TDD上下行参考配置为 TDD上下行配置 2, 则 n = 2、 7时, K={8,7,6,5,4}; 或者,
若所述 TDD上下行参考配置为 TDD上下行配置 3 , 则 η = 2时, Κ={ 11, 10,9,8} , η = 3时, Κ={8,7,6} , η = 4时, Κ={6,5,4};
或者,
若所述 TDD上下行参考配置为 TDD上下行配置 4, 则 n = 2时, K={ 12,11, 10,9.8} , η = 3时, Κ={8,7,6,5,4};
或者,
若所述 TDD 上下行参考配置为 TDD 上下行配置 5 , 则 η = 2 时, Κ={ 13, 12,11, 10,9.8,7,6,5,4};
或者,
若所述 TDD上下行参考配置为 TDD上下行配置 6, 则 η=2时, Κ={7,6} , η=3、 7时,
Κ={6,5} , η=4、 8时, Κ={5,4}。
11、 一种基于权利要求 7~10任一项所述装置的混合自动重传请求 HARQ反馈的实现 装置, 其特征在于, 包括:
第三确定单元, 用于根据分配 FDD下行子帧的结果, 确定 TDD上下行参考配置指示 的上行子帧承载的 FDD下行子帧对应的 ACK/NACK信息;
通信单元, 用于根据所述 TDD上下行参考配置指示的上行子帧承载的 FDD下行子帧 对应的 ACK/NACK信息, 将所述 FDD下行子帧对应的 ACK/NACK信息承载在对应的上 行子帧中进行反馈。
12、 一种基于权利要求 7~10任一项所述装置的混合自动重传请求 HARQ反馈的实现 装置, 其特征在于, 包括:
第三确定单元, 用于根据分配 FDD下行子帧的结果, 确定 TDD上下行参考配置指示 的上行子帧承载的 FDD下行子帧对应的 ACK/NACK信息;
通信单元, 用于根据确定的所述 TDD上下行参考配置指示的上行子帧承载的 FDD下 行子帧对应的 ACK/NACK信息, 接收承载在上行子帧中的所述 FDD 下行子帧对应的 ACK/NACK信息。
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