CN108809534A - Dispatching method, HARQ-ACK feedback methods and relevant device - Google Patents

Dispatching method, HARQ-ACK feedback methods and relevant device Download PDF

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Publication number
CN108809534A
CN108809534A CN201710816832.4A CN201710816832A CN108809534A CN 108809534 A CN108809534 A CN 108809534A CN 201710816832 A CN201710816832 A CN 201710816832A CN 108809534 A CN108809534 A CN 108809534A
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China
Prior art keywords
cbg
ack
harq
scheduled
downlink
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CN201710816832.4A
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Chinese (zh)
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CN108809534B (en
Inventor
王轶
李迎阳
张世昌
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Beijing Samsung Telecommunications Technology Research Co Ltd
Samsung Electronics Co Ltd
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Beijing Samsung Telecommunications Technology Research Co Ltd
Samsung Electronics Co Ltd
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Priority to CN202210663807.8A priority Critical patent/CN114826490B/en
Application filed by Beijing Samsung Telecommunications Technology Research Co Ltd, Samsung Electronics Co Ltd filed Critical Beijing Samsung Telecommunications Technology Research Co Ltd
Priority to EP24165005.0A priority patent/EP4366436A2/en
Priority to EP18793969.9A priority patent/EP3635898A4/en
Priority to RU2019139378A priority patent/RU2746224C1/en
Priority to PCT/KR2018/004801 priority patent/WO2018203612A1/en
Priority to EP23152657.5A priority patent/EP4191920B1/en
Priority to US16/611,115 priority patent/US11219049B2/en
Priority to KR1020197032690A priority patent/KR102499381B1/en
Publication of CN108809534A publication Critical patent/CN108809534A/en
Application granted granted Critical
Publication of CN108809534B publication Critical patent/CN108809534B/en
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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
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/1887—Scheduling and prioritising arrangements
    • 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
    • H04L1/1607—Details of the supervisory signal
    • H04L1/1614—Details of the supervisory signal using bitmaps
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H04W72/1273—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of downlink data flows
    • 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
    • H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
    • H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
    • H04L1/0618—Space-time coding
    • H04L1/0637—Properties of the code
    • H04L1/0643—Properties of the code block codes
    • 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
    • H04L1/1607—Details of the supervisory signal
    • H04L1/1621—Group acknowledgement, i.e. the acknowledgement message defining a range of identifiers, e.g. of sequence numbers
    • 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
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • 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
    • H04L1/1825—Adaptation of specific ARQ protocol parameters according to transmission conditions
    • 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
    • H04L1/1835—Buffer management
    • 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
    • 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
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/1896—ARQ related signaling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0055—Physical resource allocation for ACK/NACK
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)

Abstract

The present disclosure proposes the methods and corresponding network node of the schedule downlink transmissions executed at network node.This method includes：According to the maximum number for the encoding block group (CBG) that can divide in the number for the transmission block (TB) being scheduled in the downlink transmission to be transmitted and the downlink transmission, the maximum number for the CBG that can divide in each TB to determine the downlink transmission；The maximum number for the CBG that can divide in each TB based on the downlink transmission, to determine the CBG configurations for the CBG being scheduled in corresponding TB；And send the downlink control signaling for indicating the CBG configurations.In addition, the disclosure also proposed the method for being used to feed back hybrid automatic repeat-request affirmative acknowledgement (HARQ-ACK) executed at user equipment (UE) and respective user equipment and the communication system including above-mentioned network node and user equipment.

Description

Dispatching method, HARQ-ACK feedback methods and relevant device
Technical field
This disclosure relates to mobile communication technology field, more particularly, to a kind of downlink transmission dispatching method and phase Network node, HARQ-ACK (hybrid automatic repeat-request-affirmative acknowledgement) feedback methods and the corresponding user equipment answered and Corresponding computer readable storage medium and the communication system including network node and user equipment.
Background technology
With the fast development of information industry, especially from mobile Internet and Internet of Things (Internet of Things or referred to as IoT) increased requirement, bring unprecedented challenge to future mobile.In order to cope with this It is mobile logical that unprecedented challenge, communications industry circle and academia have expanded extensive 5th generation (5G) towards the year two thousand twenty Believe technical research.According to the work plan of 3GPP (third generation partner program) tissue, to the work of first stage of 5G It is underway.
In order to support more flexible scheduling, 3GPP decisions to support variable HARQ-ACK feedback delay in 5G.In 5G systems In system, either FDD (frequency division duplex or Frequency Division Duplex) or TDD (time division duplex or Time Division Duplex) system, time quantum (is also referred to as " downlink ") sometimes herein for a determining downlink (otherwise referred to as time resource, for example, descending time slot or the mini time slot of downlink), can be used for feeding back the uplink of HARQ-ACK It is variable that road (is also referred to as " uplink ") time quantum sometimes herein.For example, can dynamically be referred to by physical layer signaling Show the time delay of HARQ-ACK feedbacks, it can also be different because usually determining according to different business or UE capability etc. HARQ-ACK time delays.Therefore, it even if in FDD system, may also appear in a upstream time unit, feedback is under multiple The HARQ-ACK of downlink transmission in row time quantum.
In addition, it is contemplated that the size of the transmission block (Tranport Block are abbreviated as TB) in 5G systems can be further Increase, and in order to preferably support coexisting for different service types, such as destroys (puncture) part eMBB (enhancing movements Broadband) business PDSCH (physical down link sharing channel), for sending URLLC (super reliable and low time delay communication), 3GPP Determine that the granularity that scheduling is further refined in 5G is expanded from the scheduling as unit of TB of LTE with encoding block (Code Block is abbreviated as CB)/encoding block group (CB Group are abbreviated as CBG) be unit scheduling.Using CB/CBG as the tune of granularity Degree is primarily adapted for use in re-transmission.
5G systems also still support MIMO (multiple-input and multiple-output) to transmit.When working in MIMO transmission pattern, at one On one downgoing time unit of carrier wave, multiple TB may be dispatched simultaneously.For example, for initial transmission, when the layer of MIMO transmission (layer) when number is less than or equal to 4,1 TB is only dispatched.When the number of plies is more than 4,2 TB are dispatched.Or for retransmitting, even if The number of plies is less than or equal to 4, it is also possible to dispatch 2 TB.Certainly, the TB numbers of each actual schedule in base station are dynamically changeables.
In addition, in order to be flexibly utilized by each frequency spectrum resource, 5G still supports carrier wave to polymerize.That is, base station can be one UE (user equipment or User Equipment) configures multiple carrier waves.
It is not difficult to find out, in 5G systems, either from the angle of downlink scheduling or uplink feedback HARQ- From the perspective of ACK, for LTE, dimension has all been increased newly.Therefore how to design downlink scheduling signaling and how Design HARQ-ACK feedback mechanisms so that uplink downlink control signaling expense is reasonable, and does not influence the flexibility of scheduling, urgently Wait for a kind of new scheme.
Invention content
In order at least partly solve or mitigate the above problem, the embodiment of the present disclosure proposes downlink transmission dispatching method With network node, HARQ-ACK feedback methods and user equipment and corresponding computer readable storage medium and communication system.
According to the first aspect of the disclosure, it is proposed that a kind of side of the schedule downlink transmissions executed at network node Method.This method includes：According to the number for the transmission block (TB) that can be scheduled in the downlink transmission to be transmitted and the downlink The maximum number for the encoding block group (CBG) that can divide in link transmission, in each TB to determine the downlink transmission The maximum number for the CBG that can divide；The maximum number for the CBG that can divide in each TB based on the downlink transmission Mesh, to determine the CBG configurations for the CBG being scheduled in corresponding TB；And send the downlink control letter for indicating the CBG configurations It enables.
In some embodiments, the maximum number for the CBG that can divide in the downlink transmission is believed by high level It enables configuring, and does not change with the number for the TB that can be scheduled in the downlink transmission.In some embodiments In, the number for the TB that can be scheduled in the downlink transmission is configured by high-level signaling, for example, base station is the TB that can be scheduled Transmission mode for 1 configuration is that the transmission mode of 2 configurations is different with the TB that can be scheduled.Here the number of the TB that is scheduled Mesh, it can be understood as the TB numbers of maximum schedulable.It is not difficult to find out, this number is semi-static variation.For that can be scheduled TB be 2 transmission mode, base station is in actual schedule, and the TB numbers of schedulable can be 1, or 2.In some embodiments In, the number for the TB that can be scheduled in the downlink transmission is indicated by physical layer signaling, for example, base station be configured with maximum can The transmission mode of 2 TB is dispatched, and indicates that the TB numbers of each schedulable are 1 or 2 by physical layer signaling (DCI). Here the number of the TB that is scheduled, it can be understood as actually scheduled TB numbers.It is not difficult to find out, this is a dynamic change Process.Note that for scheduling in special circumstances, when being used for the scheduling of the DCI1A of rollback such as in LTE system, if The number for determining CBG, is not belonging to the scope of the present invention.The case where by this rollback, carries out all in accordance with the scheduling based on TB Processing, and TB is no longer subdivided into CBG.In some embodiments, according to can be scheduled in the downlink transmission to be transmitted The maximum number for the encoding block group CBG that can divide in the number of transmission block TB and the downlink transmission, it is described to determine The step of maximum number for the CBG that can divide in each TB of downlink transmission includes at least one of following：If described The maximum number for the CBG that can divide in one TB, then be determined as by only most one TB of schedulable of downlink transmission Equal to the maximum number for the CBG that can divide in the downlink transmission；If the downlink transmission actual schedule one A TB, then being determined as the maximum number for the CBG that can divide in one TB can equal in the downlink transmission The maximum number of the CBG of segmentation；If one TB of the downlink transmission actual schedule, and this TB is initial transmission, Then the maximum number for the CBG that can divide in one TB being determined as being equal in the downlink transmission can divide The maximum number of CBG, and the maximum number for the CBG that can divide in this TB when the re-transmission of this TB is constant；If described Downlink transmission two TB of most schedulable then determine the maximum number of the CBG that can divide of described two TB, make respectively Described two TB are able to the sum of maximum number of CBG of segmentation and are equal to and can divide in the downlink transmission The maximum number of CBG and described two TB be able to segmentation CBG maximum number it is equal or difference 1；If under described Two TB of uplink transmission actual schedule then determine the maximum number of the CBG that can divide of described two TB respectively so that Described two TB are able to the sum of maximum number of CBG of segmentation and are equal to the CBG that can divide in the downlink transmission Maximum number and described two TB be able to segmentation CBG maximum number it is equal or difference 1；If the downlink Two TB of link transmission actual schedule then determine the maximum number of the CBG that can divide of described two TB so that institute respectively It states two TB and is able to the sum of maximum number of CBG of segmentation equal to the CBG's that can divide in the downlink transmission Maximum number and described two TB be able to the CBG of segmentation maximum number is equal or difference 1, and the two TB exist When re-transmission, if downlink transmission only scheduled wherein 1 TB, the maximum number for the CBG that this TB can be divided is therewith Before this TB can be divided when being scheduled simultaneously 2 TB CBG maximum number it is identical.
In some embodiments, the maximum number for the CBG that can divide in each TB based on the downlink transmission, Include come the step of determining the CBG configurations of the CBG dispatched in corresponding TB：Determine that the CBG for the CBG that can be scheduled in corresponding TB matches It sets so that the number for the CBG being scheduled in the corresponding TB is less than or equal to the maximum for the CBG that can divide in the corresponding TB Number.The maximum number for the CBG that can divide in each TB based on the downlink transmission, is adjusted to determine in corresponding TB The CBG of degree CBG configuration the step of include：For each TB, most according to the CBG that can divide in the downlink transmission Big figure determines the virtual CBG numbers of the maximum of corresponding TB；According to the virtual CBG numbers of the maximum of the size of corresponding TB and corresponding TB Come determine corresponding TB virtual CBG number；And the virtual CBG is mapped to practical CBG and is configured with the determination CBG, So that the number of the practical CBG is no more than the maximum number for the CBG that can divide in corresponding TB.In some embodiments, base The maximum number for the CBG that can divide in each TB of the downlink transmission, to determine the CBG being scheduled in corresponding TB CBG configuration the step of include：For each TB, according to the maximum for the CBG that can divide in the size of corresponding TB and corresponding TB Number determines the number of actually scheduled CBG, and determines the CBG configurations in turn.In some embodiments, described in instruction The downlink control signaling of CBG configurations includes at least one of following：For the independent field of each CBG, it is used to indicate corresponding Whether CBG is scheduled；The independent field of independent field or corresponding multiple CBG for each CBG, is used to indicate whether to need Empty the hybrid automatic repeat-request harq buffer area of corresponding CBG；First kind downlink distribution index DAI；And second class DAI.In some embodiments, first kind DAI is used to indicate one of the following terms：It is fed back in binding window in HARQ-ACK, to working as Until preceding scheduled downgoing time unit and current carrier, the sum of scheduled number of CBG；It feeds back and binds in HARQ-ACK In window, to currently scheduled downgoing time unit and/or current carrier before a nearest downgoing time unit and/or load Until wave, the sum of scheduled number of CBG+1；It is fed back in binding window in HARQ-ACK, to currently scheduled downgoing time Until unit and current carrier, the sum of the number of the maximum CBG of scheduled downgoing time unit and/or descending carrier；And It is fed back in binding window in HARQ-ACK, nearest one to before currently scheduled downgoing time unit and/or current carrier Until downgoing time unit and/or carrier wave, the number of the maximum CBG of scheduled downgoing time unit and/or descending carrier it With+1.In some embodiments, the second class DAI is used to indicate one of the following terms：The total bit number of HARQ-ACK code books；? HARQ-ACK feedbacks bind first downgoing time unit in window in all scheduled downgoing time units to current downlink The sum of the scheduled CBG of all scheduled carrier waves until time quantum；And feed back institute in binding window in HARQ-ACK All until having first downgoing time unit to current downlink time quantum in scheduled downgoing time unit are adjusted The sum of the maximum CBG of the carrier wave of degree.In some embodiments, the downlink transmission is physical down link sharing channel PDSCH transmission.
According to the second aspect of the disclosure, it is proposed that a kind of network node of schedule downlink transmissions.The network node Including：Encoding block group maximum number determination unit, for according to the transmission block that can be scheduled in the downlink transmission to be transmitted (TB) maximum number for the encoding block group (CBG) that can divide in number and the downlink transmission, come determine it is described under The maximum number for the CBG that can divide in each TB of uplink transmission；CBG configures determination unit, for being based on the downlink The maximum number for the CBG that can divide in each TB of link transmission, to determine the CBG configurations for the CBG being scheduled in corresponding TB； And control signaling transmission unit, for sending the downlink control signaling for indicating the CBG configurations.
According to the third aspect of the disclosure, it is proposed that a kind of network node of schedule downlink transmissions.The network node Including：Processor；Memory, is stored with instruction, and described instruction makes the processor when being executed by the processor：According to It can divide in the number and the downlink transmission of the transmission block (TB) that can be scheduled in the downlink transmission to be transmitted Encoding block group (CBG) maximum number, the maximum for the CBG that can divide in each TB to determine the downlink transmission Number；The maximum number for the CBG that can divide in each TB based on the downlink transmission, is adjusted to determine in corresponding TB The CBG of the CBG of degree is configured；And send the downlink control signaling for indicating the CBG configurations.
According to the fourth aspect of the disclosure, it is proposed that a kind of computer readable storage medium of store instruction, described instruction It enables the processor to execute the method according to disclosure first aspect when executed by the processor.
According to the 5th of the disclosure the aspect, it is proposed that one kind executed at user equipment (UE) is used to feed back mixing automatically The method of retransmission request affirmative acknowledgement (HARQ-ACK).This method includes：Receive downlink control signaling；According to the downlink Link control signaling, the reference transmission block in downlink transmission corresponding with the downlink control signaling, Yi Jizhen To the decoding result of the downlink transmission, to generate HARQ-ACK code books；And according to the HARQ-ACK code books generated To feed back HARQ-ACK corresponding with the downlink transmission.
In some embodiments, the downlink control signaling is the downlink control instruction received from network node Accord with DCI and/or high-level signaling.In some embodiments, the downlink control signaling includes at least one of following：The first kind Downlink distribution index DAI；Second class DAI；The number of transport blocks purpose information being based on for determining feedback HARQ-ACK；It passes The maximum number for the encoding block group CBG that can divide in defeated piece of TB；And whether HARQ-ACK feedbacks carry out Spatial Dimension binding. In some embodiments, in the transmission of the same uplink, with can be scheduled to feed back at least the one of HARQ-ACK The number of the transmission block of a carrier wave is more than in the case of 1：If the downlink control signaling instruction is without Spatial Dimension Binding then feeds back the transmission block number that HARQ-ACK is based on and is equal to 2；If the downlink control signaling instruction carries out empty Between dimension bind, then feed back transmission block number that HARQ-ACK is based on and be equal to 1.In some embodiments, for the downlink The bit length of the ACK/ negative responses NACK of link transmission is：The maximum number for the CBG that can divide in TB and feedback HARQ- The number of transport blocks purpose product that ACK is based on；The number of the CBG of reference transmission block institute actual schedule and feedback HARQ-ACK The number of transport blocks purpose product being based on.In some embodiments, the reference transmission block be the number of the CBG of actual schedule most Big transmission block.In some embodiments, according to the downlink control signaling, opposite with the downlink control signaling Reference transmission block in the downlink transmission answered and the decoding result for the downlink transmission, to generate HARQ- The step of ACK code books includes：According to the second class DAI of the downlink control signaling, the HARQ-ACK code books are determined The number of transport blocks purpose product that the value that bit length is the second class DAI is based on feedback HARQ-ACK.In some implementations In example, according in the downlink control signaling, downlink transmission corresponding with the downlink control signaling Reference transmission block and decoding result for the downlink transmission include the step of HARQ-ACK code books to generate：Root According to the first kind DAI of the downlink control signaling, determine the ACK/NACK of the downlink transmission in the HARQ- Starting point in ACK code books.In some embodiments, according to the first kind DAI of the downlink control signaling, determine it is described under The step of starting points of the ACK/NACK of uplink transmission in the HARQ-ACK code books includes one of the following terms：Under described The starting point of bit position of the ACK/NACK bits of uplink transmission in the HARQ-ACK code books is determined as the downlink chain The first kind DAI of road control signaling；By the ACK/NACK bits of the downlink transmission in the HARQ-ACK code books The first kind DAI that the starting point of bit position is determined as the downlink control signaling subtracts the ACK/ of the downlink transmission NACK bit lengths add 1；By ratio of the ACK/NACK bits of the downlink transmission in the HARQ-ACK code books The starting point of special position is determined as the transmission block that the first kind DAI of the downlink control signaling is based on feedback HARQ-ACK The product of number subtracts 1 again；And by the ACK/NACK bits of the downlink transmission in the HARQ-ACK code books The starting point of bit position is determined as the transmission that the first kind DAI of the downlink control signaling is based on feedback HARQ-ACK The ACK/NACK bit lengths that block number purpose product subtracts the downlink transmission add 1.In some embodiments, according to Reference transmission in the downlink control signaling, downlink transmission corresponding with the downlink control signaling Block and decoding result for the downlink transmission include the step of HARQ-ACK code books to generate：By the downlink The maximum number that the ACK/NACK bit lengths of link transmission are determined as the CBG that can divide in TB is multiplied by feedback HARQ-ACK institutes Based on transmission block number, wherein the ACK/NACK bits of CBG being scheduled in scheduled TB are according to actual schedule The CRC check result of CBG generates, and the ACK/NACK bits of scheduled CBG are occupy-place bit, wherein is not adjusted The ACK/NACK bits of the TB of degree are occupy-place bit.In some embodiments, according to the downlink control signaling, with it is described Reference transmission block in the corresponding downlink transmission of downlink control signaling and for the downlink transmission Decoding result includes the step of HARQ-ACK code books to generate：The ACK/NACK bit lengths of the downlink transmission is true The number and the feedback HARQ-ACK number of transport blocks purposes being based on for being set to the CBG of reference transmission block institute actual schedule multiply Product, wherein the ACK/NACK bits of the reference transmission block are generated according to the CRC check result of the CBG of actual schedule, Wherein, the ACK/NACK bits of non-reference transmission block be according to the CRC check result of the CBG of non-reference transmission block actual schedule come It generates, and additional generation occupy-place bit so that the ACK/NACK bit lengths of non-reference transmission block are equal to the reference transmission The number of the CBG of block actual schedule.In some embodiments, according to the downlink control signaling and the downlink Reference transmission block in the corresponding downlink transmission of control signaling and the decoding knot for the downlink transmission Fruit includes the step of HARQ-ACK code books to generate：When downlink control signaling instruction Spatial Dimension binding, by institute The length for stating the ACK/NACK bits of downlink transmission is determined as the maximum number for the CBG that TB can be divided, wherein described ACK/NACK bits are that the ACK/NACK by the CBG to being scheduled in each TB, and with identical CBG indexes carries out logic It is obtained with operation.In some embodiments, according to the downlink control signaling and the downlink control signaling Reference transmission block in corresponding downlink transmission and the decoding result for the downlink transmission, to generate The step of HARQ-ACK code books includes：It is all determining if the downlink transmission scheduled all CBG of a TB In the case of the CRC check of CBG is correct：If the CRC check of one TB is incorrect, by the ACK/NACK of all CBG It is set as NACK, if the CRC check of one TB is correct, the ACK/NACK of all CBG is set as ACK.At some In embodiment, according to the downlink control signaling, downlink transmission corresponding with the downlink control signaling In reference transmission block and decoding result for the downlink transmission, wrapped the step of HARQ-ACK code books to generate It includes：If all CBG of the unscheduled TB of downlink transmission, and until the current scheduling moment, it is one The CRC check of all CBG of TB is correct, but the CRC check of the TB is incorrect, then according at least one the following terms come really Determine the value of ACK/NACK：NACK is fed back for all CBG；It will feed back unscheduled in ACK and current this time scheduling CBG ACK/NACK bit values be NACK；And it will feed back unscheduled in ACK and current this time scheduling The ACK/NACK bit values of CBG are opposite with predefined occupy-place bit value.In some embodiments, according to the downlink Link control signaling, the reference transmission block in downlink transmission corresponding with the downlink control signaling, Yi Jizhen To the decoding result of the downlink transmission, include the step of HARQ-ACK code books to generate：Both it had fed back for the downlink The ACK/NACK for the CBG that link transmission is divided also feeds back the HARQ-ACK for the correspondence TB for being directed to the downlink transmission. In some embodiments, the downlink transmission is physical down link sharing channel PDSCH transmission.
According to the 6th of the disclosure the aspect, it is proposed that one kind is for feeding back hybrid automatic repeat-request affirmative acknowledgement (HARQ- ACK user equipment (UE)).The UE includes：Control signaling receiving unit, for receiving downlink control signaling；Code book is given birth to At unit, for being passed according to the downlink control signaling, downlink corresponding with the downlink control signaling Reference transmission block in defeated and the decoding result for the downlink transmission, to generate HARQ-ACK code books；And it is anti- Unit is presented, for feeding back HARQ-ACK corresponding with the downlink transmission according to the HARQ-ACK code books generated.
According to the 7th of the disclosure the aspect, it is proposed that one kind is for feeding back hybrid automatic repeat-request affirmative acknowledgement (HARQ- ACK user equipment (UE)).The UE includes：Processor；Memory, is stored with instruction, and described instruction is held by the processor Make the processor when row：Receive downlink control signaling；According to the downlink control signaling and the downlink chain Reference transmission block in the corresponding downlink transmission of road control signaling and the decoding knot for the downlink transmission Fruit, to generate HARQ-ACK code books；And it is fed back and the downlink transmission phase according to the HARQ-ACK code books generated Corresponding HARQ-ACK.
According to the eighth aspect of the disclosure, it is proposed that a kind of computer readable storage medium of store instruction, described instruction It enables the processor to execute the method according to the 5th aspect of the disclosure when executed by the processor.
According to the 9th of the disclosure the aspect, it is proposed that a kind of communication system.The communication system includes：According to the disclosure second Network node described in aspect or the third aspect；And it is one or more according to described in the 6th aspect of the disclosure or the 7th aspect User equipment (UE).
By using the scheme of the embodiment of the present disclosure, can solve when using CBG transmission, to effectively reduce HARQ-ACK Feedback overhead, and avoid misunderstanding of the base station (network node) with UE to HARQ-ACK code books (otherwise referred to as code book) size. Especially when not only CBG being used to transmit, but also working in MIMO mode, the embodiment of the present disclosure significantly reduces downlink control The expense of channel and the uplink channel of carrying HARQ-ACK feedbacks.
Description of the drawings
According to the description to some embodiments provided below in conjunction with attached drawing, these and/or other sides of the disclosure Face and advantage will become apparent, and it is more readily appreciated that wherein：
Fig. 1 is the flow chart for showing the exemplary method for schedule downlink transmissions according to the embodiment of the present disclosure.
Fig. 2 is the flow chart for showing the exemplary method for being used to feed back HARQ-ACK/NACK according to the embodiment of the present disclosure.
Fig. 3 is to show the schematic diagram that virtual CBG and practical CBG are generated according to an embodiment of the present disclosure.
Fig. 4 is to show the schematic diagram that practical CBG is generated according to another embodiment of the disclosure.
Fig. 5 is to show the schematic diagram that HARQ-ACK is fed back according to an embodiment of the present disclosure.
Fig. 6 is to show another schematic diagram that HARQ-ACK is fed back according to an embodiment of the present disclosure.
Fig. 7 is to show to feed back the schematic diagram of HARQ-ACK according to another embodiment of the disclosure.
Fig. 8 is to show another schematic diagram that HARQ-ACK is fed back according to another embodiment of the disclosure.
Fig. 9 is to show another schematic diagram that HARQ-ACK is fed back according to another embodiment of the disclosure.
Figure 10 is to show another schematic diagram that HARQ-ACK is fed back according to another embodiment of the disclosure.
Figure 11 is to show another schematic diagram that HARQ-ACK is fed back according to another embodiment of the disclosure.
Figure 12 is the exemplary hardware arrangement for showing example network node and/or user equipment according to the embodiment of the present disclosure Block diagram.
Specific implementation mode
Preferred embodiment of the present disclosure is described in detail with reference to the accompanying drawings, is omitted in the course of the description for this It is unnecessary details and function for open, to prevent understanding of this disclosure from causing to obscure.In the present specification, Xia Shuyong Only illustrate in the various embodiments of description disclosure principle, should not be construed as limiting in any way scope of disclosure.Ginseng According to the exemplary implementation described below for being used to help the disclosure that comprehensive understanding is limited by claim and its equivalent of attached drawing Example.It is described below to help to understand including a variety of details, but these details are considered as being only exemplary.Therefore, originally Field those of ordinary skill should be understood that do not depart from the scope of the present disclosure and spirit in the case of, can be to described herein Embodiment make various changes and modifications.In addition, for clarity and brevity, retouching for known function and structure is omitted It states.In addition, running through attached drawing, identical reference numeral is used for same or analogous function and operation.Furthermore, it is possible to by following differences All or part of function, feature, unit, module described in embodiment etc. are combined, deleted and/or are changed, new to constitute Embodiment, and the embodiment is still fallen in the scope of the present disclosure.In addition, in the disclosure, term " comprising " and " containing " And its derivative mean including and it is unrestricted.
Hereinafter, although with " base station (Base Station or referred to as BS) " and " user equipment (User Equipment or referred to as UE) " for be described in detail the various schemes according to the embodiment of the present disclosure, however the disclosure is not It is limited to this.In fact, the disclosure is suitable for any of or exploitation in the future wireless communication standard, including but not limited to： 2G, 3G, 4G, 5G etc..For example, herein, base station can essentially include but is not limited to：Base transceiver station (Base Transceiver Station or BTS), radio base station (Radio Base Station or RBS), node B (Node B), Evolution node B (eNodeB), relay station (Relay Station), transfer point (Transmission Point) etc..Therefore, exist Herein, without clear opposite explanation, term " base station " can be with the generic term " net including aforementioned items Network node ", which exchanges, to be used, to show that it is the network side node being capable of providing with base station same or similar function.In addition, at this Wen Zhong, user equipment can also actually include the concept (but not limited to) of following term：User apparatus (User Device), Mobile station (Mobile Station), mobile terminal, smart phone, tablet computer etc..
To dispatching downlink chain be used for according to the embodiment of the present disclosure to be described in detail in conjunction with Fig. 1 and other attached drawings first below The instance method of road transmission.Fig. 1 is the exemplary method for schedule downlink transmissions shown according to the embodiment of the present disclosure 100 flow chart.
In the embodiment shown in fig. 1, before the beginning of method 100, base station can usually configure carrier wave (for example, hereinafter Carrier wave Ci) scheduling method be based on TB scheduling or the scheduling based on CBG.If being configured to the scheduling of CBG, Base station can also configure the maximum CBG numbers of schedulable, such as be set as Nmax_CBG.Base station can be shown when configuring this value The maximum CBG numbers for being configured to schedulable.It, can also scheduling can be anti-every time by configuring in addition, in further embodiments The maximum data of the HARQ-ACK bits of feedback carrys out the maximum CBG numbers of implicit instruction schedulable.For convenience of description, herein In, be described according to the maximum CBG numbers for being configured to schedulable, however it should be understood by those skilled in the art that the disclosure not It is limited to this.In addition, in some embodiments, the HARQ-ACK feedback models that base station can also configure UE associated there are bases In the still granularity based on CBG of TB.
In addition to special instruction, the present invention does not limit how a TB is specifically divided into multiple CB by base station, further Multiple CB are combined into CBG.For example, size of the base station according to TB, determination is divided into how many a CB, then according to Nmax_CBGIt determines It is combined into how many a CBG.
In some embodiments, mould can be dispatched with for configuring carrier wave for configuring the signaling of HARQ-ACK feedback models The signaling of formula is same signaling.For example, if by carrier wave CiScheduling method be configured to TB, then can implicitly by HARQ-ACK feedbacks are also configured as being based on TB.Alternatively, in further embodiments, for configuring HARQ-ACK feedback models Signaling can be the signaling independently configured with the signaling for configuring carrier wave scheduling method.For example, can be by carrier wave Ci's Scheduling method is configured to TB, but is based on CBG by HARQ-ACK feedback configurations.In addition, in some embodiments, matching above Confidence breath can be all or part of high-level signaling and be semi-statically configured.It is worth noting that, being configured to the scheduling of CBG/anti- Feedback pattern, the scheduling information for each CBG of instruction that base station can be shown in descending control signaling DCI, finger that can also be implicit Show, and makes UE determine which CBG is scheduled by predefined criterion.The disclosure is not specially limited.
In addition, in some embodiments, base station can also configure MIMO transmission pattern and (be referred to as MIMO scheduling sometimes Pattern).For example, the transmission between base station and UE can be configured to SIMO (single input and multi-output) or MIMO transmission pattern, but it is unlimited Determine the number of plies of MIMO.In addition, in some embodiments, the transmission between base station and UE is also configured as at most sending a TB Or the transmission mode of two TB.
In some embodiments, by the maximum CBG number Ns of the schedulable of base station configurationmax_CBGIt can indicate once dispatching In the maximum CBG numbers that can dispatch.If in primary scheduling, multiple TB are scheduled, then the CBG's being scheduled in all TB is total Number is no more than Nmax_CBG.If in primary scheduling, a TB is only scheduled, then the sum of CBG scheduled this TB is usual No more than Nmax_CBG。
In further embodiments, by the maximum CBG number Ns of the schedulable of base station configurationmax_CBGIt can indicate once adjusting The sum for the CBG being scheduled in a TB in degree is no more than Nmax_CBG.In this case, if in primary scheduling, scheduling The sum of 2 TB, the then CBG being scheduled in all TB are typically not greater than 2*Nmax_CBG.Therefore, base station can be to maximum CBG Number Nmax_CBGIt is that the CBG sums of a TB in the CBG sums or primary scheduling in primary scheduling are configured.In some realities It applies in example, information related with the configuration can be that high-level signaling is semi-statically configured.
It in some embodiments, can be according to standard come predetermined configuration maximum CBG number Nsmax_CBGIn once dispatching CBG sum.It in further embodiments, can be according to standard come predetermined configuration maximum CBG number Nsmax_CBGOnce to adjust The CBG sums of a TB in degree.
Next, by the scheduling according to the embodiment of the present disclosure is described in detail in conjunction with step S110~S130 shown in FIG. 1 The exemplary method 100 of downlink transmission.
As shown in Figure 1, method 100 may begin at step S110.In step s 110, base station can be according to will send out to UE The coding that can divide in the number and the downlink transmission of the transmission block (TB) that can be scheduled in the downlink transmission sent The maximum number of block group (CBG), the maximum number for the CBG that can divide in each TB to determine the downlink transmission.
In some embodiments, if carrier wave is (for example, carrier wave Ci) scheduling method base is configured to by base station as previously described It is dispatched in CBG, the number and maximum CBG numbers determining as described above that base station can be according to the maximum TB of the schedulable of configuration Mesh Nmax_CBG, to determine the maximum CBG number Ns of schedulable in each TBmax_CBG_TBi.In step s 110, base station can basis The maximum TB numbers N of schedulableTBAnd/or predefined criterion, to determine the maximum CBG numbers of practical schedulable in each TB Nmax_CBG_TBi.In some embodiments, which can be：
Nmax_CBG_TBi=Nmax_CBG/NTB。
In some embodiments, if carrier wave is (for example, carrier wave Ci) scheduling method base is configured to by base station as previously described It is dispatched in CBG, then the number and maximum CBG numbers determining as described above that base station can be according to the TB of actual schedule Nmax_CBG, to determine the maximum CBG number Ns of schedulable in each TBmax_CBG_TBi。
In some embodiments, in step s 110, if the encoding block group (CBG) that can divide in downlink transmission Maximum number Nmax_CBGTotal for the CBG in once dispatching, then base station can be according to the TB numbers N of actual scheduleTBAnd/or it is predetermined The criterion of justice, to determine the maximum CBG number Ns of practical schedulable in each TBmax_CBG_TBi.In some embodiments, this is predetermined Justice criterion can be：
Nmax_CBG_TBi=Nmax_CBG/NTB。
If Nmax_CBGIt is not NTBIntegral multiple, then in some embodiments can according to the principle of decile as possible, will Nmax_CBGAssign to NTBIn a TB.For example, if Nmax_CBG=5 and NTB=2, the then N of first TBmax_CBG_TB1Can be 2 and the The N of two TBmax_CBG_TB2Can be the N of 3 or first TBmax_CBG_TB1Can be the N of 3 and second TBmax_CBG_TB2It can Think 2.
Next, as shown in Figure 1, method 100 may proceed to step S120.In the step s 120, base station can be based on The maximum number for the CBG that can divide in each TB of downlink transmission, to determine the CBG for the CBG being scheduled in corresponding TB Configuration.
In some embodiments, in order to determine practical schedulable CBG configuration, can at least through following two modes reality It is existing.Alternatively, by other methods, according to the size and N of TBmax_CBG_TBi, determine the configuration of the CBG of each TB.
CBG configuration modes one
In some embodiments, for each TB, base station can pass through Nmax_CBGTo determine the virtual maximum CBG of corresponding TB Number Nvirtual_max_CBG_TBi.For example, N can be enabledvirtual_max_CBG_TBi=Nmax_CBG.Then, base station can according to TB sizes with And Nvirtual_max_CBG_TBiCome determine scheduling virtual CBG number Nvirtual_CBG_TBi.Next, base station can be according to predetermined The mode of justice, virtual CBG is mapped on actual CBG so that the CBG numbers of practical schedulable are no more than real in corresponding TB The maximum CBG number Ns of border schedulablemax_CBG_TBi.In this way it is possible to determine the CBG configurations in each TB.
For example, as shown in the lower part of Figure 3, if Nmax_CBG=4, in this scheduling, base station scheduled 2 TB：TBaWith TBb, and therefore N as described abovemax_CBG_TBi=2.With TBaFor, Nvirtual_max_CBG_TBa=4 and Nmax_CBG_TBa=2.Assuming that TBa Size be 50000, and 6 CB can be divided into, and be divided into 4 virtual CBG, wherein the 1st, 2 CB constitute the 1st it is virtual CBG, the 3rd, 4 CB constitute the 2nd virtual CBG, and the 5th CB constitutes the 3rd virtual CBG, and the 6th CB constitutes the 4th virtually CBG.This 4 virtual CBG can be mapped in 2 practical CBG, then the 1st, 2 virtual CBG can be mapped as the 1st reality CBG, and the 3rd, 4 virtual CBG can be mapped as the 2nd practical CBG.In addition, as understood by those skilled in the art：It is above-mentioned to show Example is only for a kind of example for helping reader to understand, is also not excluded for can having other predefined modes virtual by 4 CBG is mapped in 2 practical CBG.For example, the 1st, 3 virtual CBG can be mapped as the 1st practical CBG, and the 2nd, 4 virtual CBG can be mapped as the 2nd practical CBG etc..
In addition, as shown in the tops Fig. 3, if in this scheduling, base station only scheduled 1 TBa, then therefore Nmax_CBG_TBi =4.In this case, 4 virtual CBG can correspond to 4 practical CBG.
CBG configuration modes two
In further embodiments, for each TB, base station can be according to corresponding TB sizes and practical schedulable most Big CBG numbers Nmax_CBG_TBiCome determine actual schedule CBG number.
For example, shown on the right side of Fig. 4, if Nmax_CBG=4, in this scheduling, base station scheduled 2 TB：TBaWith TBb, and therefore Nmax_CBG_TBi=2.With TBaFor, it is assumed that TBaSize be 50000,6 CB can be divided into, then actual schedule CBG numbers are 2 (because CB numbers > 1).Wherein the 1st, 2,3 CB constitutes the 1st actual CBG, and the 4th, 5,6 CB constitutes the 2 actual CBG.
In another example as shown on the left of Fig. 4, if in this scheduling, base station only scheduled a TB, then the wherein the 1st, 2 A CB constitutes the 1st practical CBG, and the 3rd, 4 CB constitutes the 2nd practical CBG, and the 5th CB constitutes the 3rd practical CBG, and the 6th A CB constitutes the 4th practical CBG.
As described above, it can be seen that " CBG configuration modes two " is more simple in terms of realization, but " the configuration sides CBG Formula one " is more robust in the case of UE missing inspection DCI, and in some cases, can also improve the efficiency of re-transmission, below Provide several examples.
In some embodiments, the TB numbers that base station is dispatched each time may be different, but Nmax_CBG_TBiNot with reality The TB numbers of scheduling change.For example, the maximum TB numbers N for the schedulable that base station is configured by high-level signalingTB=2, if under current It only scheduled a TB, the N of this TB in uplink transmissionmax_CBG_TBi=Nmax_CBG/ 2, rather than Nmax_CBG_TBi=Nmax_CBG。
In some embodiments, the TB numbers that base station is dispatched each time may be different.For example, base station can be according to this biography The TB numbers of defeated actual schedule determine Nmax_CBG_TBi.So for different TB, the N that dispatches each timemax_CBG_TBiMay be It is identical, it is also possible to be different.For identical TB, a kind of realization method, when retransmitting and just passing (initial transmission), or In different number of retransmissions, Nmax_CBG_TBiTB numbers when according to each transmission determine.Another realization method, for same TB, when retransmitting and just passing (initial transmission), or in different number of retransmissions, Nmax_CBG_TBiIt remains unchanged, according to this TB numbers when TB initial transmissions determine.
For example, base station scheduled 2 TB：TBaAnd TBb, it is initial transmission.At this point, Nmax_CBG_TBa=Nmax_CBG_TBb =2.If TBbSuccessful transmissions, but TBaTransmission failure, then only dispatch TB when the Schedule retransmission of base stationa.In this case, Nmax_CBG_TBa=4.
According to CBG configuration modes one, the TB just passed is dispatched in base stationaWhen, Nmax_CBG_TBa=2, wherein CB1~4 are practical The CBG1 of scheduling, and the CBG2 that CB5~6 are actual schedule.Assuming that UE demodulation CBG2 failures, but unsuccessful demodulation CBG1, then base It stands in Schedule retransmission TBaWhen, dispatch CB5~6.N at this timemax_CBG_TBa=4.The CBG that so base station instruction is dispatched at this time is CBG3 And CBG4, i.e. CB5~6.
According to CBG configuration modes two, the TB just passed is dispatched in base stationaWhen, Nmax_CBG_TBa=2, wherein CB1~3 are practical The CBG1 of scheduling, and the CBG2 that CB4~6 are actual schedule.Assuming that UE demodulation CBG2 failures, but unsuccessful demodulation CBG1, then base It stands in Schedule retransmission TBaWhen, dispatch CB4~6.N at this timemax_CBG_TBa=4.CBG is grouped again, i.e., the the wherein the 1st, 2 CB is constituted 1st CBG, the 3rd, 4 CB constitute the 2nd CBG, and the 5th CB constitutes the 3rd CBG, and the 6th CB constitutes the 4th CBG.In order to CB4~6 are retransmitted, the CBG that base station instruction is dispatched at this time is CBG2,3 and 4, i.e. CB3~6.
In another example base station scheduled 1 TB：TBa, it is initial transmission.At this point, Nmax_CBG_TBa=4.If TBaTransmission Fail, then this TB of base station Schedule retransmission, while scheduled the TB of an initial transmissionb.At this point, Nmax_CBG_TBa=Nmax_CBG_TBb =2.
According to CBG configuration modes one, the TB just passed is dispatched in base stationaWhen, Nmax_CBG_TBa=4, wherein the 1st, 2 CB structure At the CBG of the 1st actual schedule, the 3rd, 4 CB constitutes the CBG of the 2nd actual schedule, and the 5th CB constitutes the 3rd actual schedule CBG, and the 6th CB constitutes the CBG of the 4th actual schedule.Assuming that UE demodulation CBG2 failures, but unsuccessful demodulation CBG1,3, 4.Base station is in Schedule retransmission TBaWhen dispatch CB3~4.N at this timemax_CBG_TBa=2.So base station indicates that the CBG dispatched at this time is CBG1, i.e. CB1~4.
According to CBG configuration modes two, the TB just passed is dispatched in base stationaWhen, Nmax_CBG_TBa=4, wherein the 1st, 2 CB structure At the CBG of the 1st actual schedule, the 3rd, 4 CB constitutes the CBG of the 2nd actual schedule, and the 5th CB constitutes the 3rd actual schedule CBG, and the 6th CB constitutes the CBG of the 4th actual schedule.Assuming that UE demodulation CBG2 failures, but unsuccessful demodulation CBG1,3, 4.In base station Schedule retransmission TBaWhen, dispatch CB3~4.N at this timemax_CBG_TBa=2.CBG is grouped again, i.e., the the wherein the 1st, 2,3 CB constitutes the 1st CBG, and the 4th, 5,6 CB constitutes the 2nd CBG.In order to retransmit CB3~4, base station indicates the CBG dispatched at this time For CBG1 and CBG2, i.e., all CB.
For example, base station scheduled 2 TB：TBaAnd TBb, it is initial transmission.At this point, Nmax_CBG_TBa=Nmax_CBG_TBb =2.If TBbAll CBG Successful transmissions, but TBaPart CBG transmission failures, when base station Schedule retransmission can only dispatch TBa.In this case, Nmax_CBG_TBa=2.
According to CBG configuration modes two, the TB just passed is dispatched in base stationaWhen, Nmax_CBG_TBa=2, wherein CB1~3 are practical The CBG1 of scheduling, and the CBG2 that CB4~6 are actual schedule.Assuming that UE demodulation CBG2 failures, but unsuccessful demodulation CBG1, then base It stands in Schedule retransmission TBaWhen, dispatch CB4~6.N at this timemax_CBG_TBa=2, the CBG that base station instruction is dispatched at this time is CBG2.
In another example base station scheduled 2 TB：TBaAnd TBb, wherein TBaAnd TBbIt is initial transmission.At this point, Nmax_CBG_TBa =Nmax_CBG_TBb=2.If TBbAll CBG Successful transmissions, but TBaPart CBG transmission failures, when the Schedule retransmission of base station TB can be dispatchedaPart CBG re-transmission and TBcNew biography.In this case, Nmax_CBG_TBa=Nmax_CBG_TBc=2.
It is worth noting that, it is likely to occur the DCI that the first biography of some TB is dispatched in UE missing inspections, it is initial to determine N when transmissionmax_CBG_TBi.Base station can avoid this obscuring by scheduling.For example, last transmission is 2 TB, if base station It can determine that the HARQ-ACK for corresponding to last transmission received can adjust for DTX/DTX then when base station is dispatched again simultaneously Spend the two TB.If last time transmission is 2 TB, if base station can determine that is received corresponds to what the last time transmitted The CBG that HARQ-ACK is at least one TB is ACK, then base station can only dispatch a TB, or dispatch two TB simultaneously.
For another example base station scheduled 1 TB：TBa, it is initial transmission.At this point, Nmax_CBG_TBa=4.If TBaTransmission Fail, then this TB of base station Schedule retransmission.Increase in order to avoid dispatching the bit number that 2 TB cause HARQ-ACK to feed back simultaneously, A kind of mode, base station cannot be in TBaBefore transmission success, then dispatch other TB.It also avoids in this way, when TB is dispatched in UE missing inspectionsaJust The DCI of biography, but have received and retransmit TBaWhen with the DCI of another TB, UE can not determine N when initial transmissionmax_CBG_TBaAsk Topic.Another way, base station can dispatch while dispatch other TB, such as TBb, and Nmax_CBG_TBa=Nmax_CBG_TBb=4.For Avoid the increase of HARQ-ACK bits, UE that from automatically carrying out the bundling of CBG dimensions so that two TB feedbacks HARQ-ACK bit numbers are still 4.The specific embodiment part for participating in HARQ-ACK feedbacks.
More generally, the embodiment of the present disclosure does not limit how one or more TB is divided into CB and unlimited by base station System forms the specific method of virtual CBG.
Next, method 100 may proceed to step S130.In step s 130, base station can send instruction in step The downlink control signaling of the CBG configurations determined in S120.For example, base station can be generated according to foregoing manner including CBG DCI including scheduling or configuration information bit, and UE is sent to by downlink control channel (for example, PDCCH).Base station institute Generate comprising one of under type such as being used to generate in the DCI including CBG scheduling or configuration information.
In some embodiments, base station can be that each TB indicates respectively scheduling information.For example, each TB all has independence MCS (modulation and encoding scheme or Modulation&Coding Scheme) instructions, RV (redundancy versions or Rendundancy Version) instruction, NDI (new data indicator or New Data Indicator) etc..In some embodiments, NDI can be with To be for each TB can also be there are a NDI is respectively present a NDI (or with identical effect for the CBG of each TB The bit information of fruit).
In addition, in some embodiments, base station can indicate respectively scheduling or configuration information for the CBG of each TB.For example, Can include one or more of following information：
(1) each CB/CBG can have independent bit field (or sometimes referred to as field or field) to be used to indicate accordingly Whether CB/CBG is scheduled.
Assuming that Nmax_CBG=4, and this quasi- scheduling NTB=2, then Nmax_CBG_TBi=2.For this 2 CBG of each TB, divide There is not the field of 1 bit to indicate whether base station scheduled this CBG.In some embodiments, if this 1 bit is relative to tune Spend the corresponding bits reversion in the initial transmission of the same TB, then it represents that do not dispatch this CBG.In some embodiments, this 1 ratio Spy is constant relative to the corresponding bits for the initial transmission for dispatching the same TB, then it represents that dispatches this CBG.In some embodiments In, this 1 bit either 1 indicates scheduling or does not dispatch this CBG according to predefined value, 0.
And for initial transmission, whether this bit can be not used in the corresponding CB/CBG of instruction and be scheduled, but be used for Indicate that this TB is initial transmission.For example, working as this bit of all CBG of a TB relative to the identical HARQ processes of scheduling This bit in the DCI of the initial transmission of previous TB inverts, then it represents that this TB is initial transmission, otherwise indicates weight It passes.That is, to the initial transmission of a TB, this bit of each CBG should all be identical value, and relative to The initial transmission of the previous TB of identical HARQ processes is dispatched, these bits invert.
The asynchronous scene of TB numbers of current primary transmission and current initial transmission is described below：
(a) for example, base station only scheduled 1 new TB in last initial transmissiona, there are 4 CBG, but this is passed Defeated middle base station scheduled two new TB：TBbAnd TBc, then there are 2 bits for respective 2 CBG of the two TB, that is, 4 bit in total.Assuming that TBaAnd TBbCorresponding (for example, HARQ processes are identical), then TBb2 bits relative to TBa4 bits it is anti- Turn, TBc2 bits inverted relative to the previous TB of the same HARQ processes.
(b) for example, base station scheduled 2 new TB in last initial transmission：TBbAnd TBc, but base station in this transmission It only scheduled 1 new TBa, it is assumed that TBaAnd TBbCorresponding (for example, HARQ processes are identical), then similarly, TBa4 bits it is opposite In TBb2 bit reversals.
In addition, in some embodiments, if the DCI also includes the NDI of TB, each CB/CBG has independent field It is only used for indicating whether corresponding CB/CBG is scheduled, and this TB still retransmits the then NDI instructions by TB for initial transmission.
(2) each CB/CBG can have whether independent field needs to empty accordingly for the corresponding CB/CBG of explicit instruction Buffering area, or by indicating whether corresponding CB/CBG is struck off, whether the corresponding CB/CBG of implicit instruction needs to empty phase 1 bit is respectively adopted to indicate whether needed to empty by the CB/CBG that the same DCI is dispatched in the buffering area or each TB answered Corresponding buffering area or multiple TB share 1 bit to indicate whether needed to empty phase by the CB/CBG that the same DCI is dispatched The buffering area answered.By inverting the field relative to the last transmission for dispatching the same TB, it can indicate that this CB/CBG is The one new CBG or CBG that emptying buffer may be needed, and the field is constant indicates that this CB/CBG is without emptying The CBG of buffering area.
However it is to be noted that：At emptying buffer, if what CB and last time that current CBG includes were transmitted CB1~4 when the CB that CBG includes is not exactly the same, such as in the buffer are the CBG1 of last transmission, and current transmission receives The buffering area of the CB of CBG2 is emptied to signaling instruction, CBG2 at this time only includes CB 3~4, then only empties the buffering of CB3~4 Area still retains CB1~2 in the buffer., whereas if CB1~4 in the buffer be last transmission CBG1 and CBG2, current transmission receive signaling instruction empty CBG1 CB buffering area and CBG1 at this time include CB1~4, then need Empty the buffering area of CB1~4.
In addition, in step s 130, in the DCI including being generated by base station comprising CBG scheduling/configuration information, may be used also To include downlink distribution index (DAI).In some embodiments, DAI can include first kind DAI and/or the second class DAI.
First kind DAI, and can be described as counting one of DAI (counter DAI), instruction the following terms：
(1) it is fed back in binding window in HARQ-ACK, to currently scheduled downgoing time unit (for example, downgoing time list First Ti) and current carrier (for example, current carrier Ci) until, the sum of scheduled number of CBG, or the HARQ- that need to feed back The sum of bit number of ACK；
(2) it is fed back in binding window in HARQ-ACK, to currently scheduled downgoing time unit (for example, downgoing time list First Ti) and/or current carrier (for example, current carrier Ci) before a nearest downgoing time unit and/or carrier wave until, quilt The sum of number of CBG of scheduling adds 1, or the sum of the bit number of HARQ-ACK that need to be fed back adds 1；
(3) it is fed back in binding window in HARQ-ACK, to currently scheduled downgoing time unit (for example, downgoing time list First Ti) and current carrier (for example, current carrier Ci) until, the maximum of scheduled downgoing time unit and/or descending carrier The sum of number of CBG, or the sum of the bit number of HARQ-ACK that need to feed back；Alternatively,
(4) it is fed back in binding window in HARQ-ACK, to currently scheduled downgoing time unit (for example, downgoing time list First Ti) and/or current carrier (for example, current carrier Ci) before a nearest downgoing time unit and/or carrier wave until, quilt The sum of the number of the downgoing time unit of scheduling and/or the maximum CBG of descending carrier add 1, or the HARQ-ACK that need to be fed back The sum of bit number adds 1.
Above-mentioned HARQ-ACK feedbacks binding window is by that may feed back HARQ-ACK/ in the same upstream time unit simultaneously The set of all downgoing time units of NACK and/or the set of all carrier waves.The unlimited length for fixing row time quantum of the disclosure Degree, such as can be descending time slot, can also be mini time slot or OFDM symbol.In some embodiments, first kind DAI Counting can be using the quantity of CBG as granularity.If being configured as TB scheduling methods, it may be considered that a TB corresponds to 1 A CBG.When the carrier wave for being configured as TB scheduling methods is scheduled, and the binding of base station not configuration space dimension, then may be used To think the scheduled CBG numbers of this carrier wave for a fixed value.For example, the CBG numbers that this carrier wave is scheduled can be equal to Supported maximum TB numbers N under MIMO modemax_TB=2.Alternatively, the CBG numbers that this carrier wave is scheduled can be equal to practical adjust The TB numbers of degree.
For above-mentioned (3) or (4), the maximum CBG numbers of scheduled each downgoing time unit and/or descending carrier Nmax_CBGIt may be different.For example, base station, which is different descending carriers, is configured with different Nmax_CBG.One special case is for part Carrier wave is configured with TB scheduling methods, then when the binding of Spatial Dimension is not configured in base station, the N of these carrier wavesmax_CBG=2, if A TB is scheduled, then the HARQ-ACK bits of another TB are occupy-place bit, while being configured with CBG for partial carrier wave and dispatching mould Formula, but the N of each carrier wave for being configured with CBG scheduling methodsmax_CBGSpecific value can be different.Side according to the present invention Method determines Nmax_CBGThe value of a HARQ-ACK；Alternatively, being configured with the carrier wave of TB scheduling methods, Nmax_CBGDepending on actual schedule TB numbers, if only scheduled a TB, Nmax_CBG=1, if scheduled 2 TB, Nmax_CBG=2.It is not difficult to find out, first The counting of class DAI is and the counting of TB dimensions to be included in the counting of CBG dimensions using the quantity of CBG as granularity.That , no matter for TB scheduling methods or CBG scheduling methods, no matter scheduled TB or two TB, first kind DAI meters All TB in each PDSCH that let it pass need the bit number of the HARQ-ACK fed back.
When base station is configured with the binding of Spatial Dimension, it is configured with the N of the carrier wave of TB scheduling methodsmax_CBG=1, if adjusted 2 TB have been spent, then the HARQ-ACK of the two TB has been carried out and is operated, for being configured with the carrier wave of CBG scheduling methods, if adjusted 2 TB are spent, according to method provided by the invention so that no matter be scheduled one or two TB, fed back Nmax_CBGThan Special HARQ-ACK.
It can be assumed for instance that the time span of HARQ-ACK feedback binding windows is a downgoing time unit, and frequency domain is tieed up Degree has 3 carrier waves.These three carrier waves are configured to support the scheduling of 2 TB of maximum.In a downgoing time unit, Base station can scheduled PDSCH on 2 carrier waves wherein, and wherein carrier wave 1 can be configured as the scheduling mode based on CBG, and maximum CBG quantity Nmax_CBG_C1=4, and carrier wave 2 can be configured as the scheduling mode based on TB, and Nmax_CBG_C2=Nmax_TB=2. In addition, carrier wave 3 can be configured as the scheduling mode based on CBG, and the quantity N of maximum CBGmax_CBG_C3=6.Assuming that：Carrier wave 1 2 TB are scheduled, the sum of the CBG of 2 TB scheduling is 3；And carrier wave 3 scheduled 1 TB, the sum of the CBG of scheduling is 6. So, as shown in figure 5, according to the method for (1), the first kind DAI=3 of carrier wave 1 indicates that carrier wave 1 scheduled 3 CBG, and carrier wave 3 first kind DAI=9 indicates that 1~carrier wave of carrier wave 3 scheduled 9 CBG in total.UE in the first kind DAI for receiving carrier wave 3, It can be found that base station does not have scheduling carrier wave 2.According to the method for (4), the first kind DAI=1 of carrier wave 1 indicates that carrier wave 1 is first The carrier wave of scheduling, and the first kind DAI=5 of carrier wave 3, indicate carrier wave 1~carrier wave 2, corresponding to the carrier wave of base station actual schedule The sum of respective maximum CBG numbers are 4.UE is in the first kind DAI for receiving carrier wave 3, it can be found that base station does not have scheduling carrier wave 2.
In another example, it can be assumed that carrier wave 1 scheduled 2 TB, and the sum of the CBG of this 2 TB scheduling is 3, and carrier wave 2 is dispatched 1 TB and carrier wave 3 scheduled 1 TB, and the sum of the CBG of scheduling is 6.So, according to the method for (1), the first kind of carrier wave 1 DAI=3 indicates that carrier wave 1 scheduled 3 CBG；The first kind DAI=5 of carrier wave 2 indicates that 1~carrier wave of carrier wave 2 scheduled 5 in total A CBG；And the first kind DAI=11 of carrier wave 3, indicate that 1~carrier wave of carrier wave 3 scheduled 11 CBG in total.Assuming that UE is confiscated The PDCCH of carrier wave 2 has received the PDCCH of carrier wave 1 and carrier wave 3.So, UE is in the first kind DAI for receiving carrier wave 3, Ke Yifa Show the missing inspection PDCCH of carrier wave 2, and determines most 2 CBG of 2 actual schedule of carrier wave.Pay attention to：Base station may be that scheduled 1 TB, it is also possible to scheduled 2 TB, but no matter base station scheduled several TB, think to scheduled most 2 CBG.
According to the method for (4), as shown in fig. 6, the first kind DAI=1 of carrier wave 1, the first kind DAI=5 of carrier wave 2, and The first kind DAI=7 of carrier wave 3.Assuming that UE confiscates the PDCCH of carrier wave 2, the PDCCH of carrier wave 1 and carrier wave 3 is had received.So, UE is in the first kind DAI for receiving carrier wave 3, it can be found that the missing inspection PDCCH of carrier wave 2.Assuming that UE confiscates carrier wave 1 PDCCH has received the PDCCH of carrier wave 2 and carrier wave 3, and UE is in the first kind DAI for receiving carrier wave 2, it can be found that missing inspection carrier wave 1 PDCCH.In addition, PDCCHs of the UE according to carrier wave 2, it may be determined that carrier wave 2 only scheduled 1 TB, but UE is generating HARQ- When ACK, it is still desirable to generate the HARQ-ACK of 2 TB, wherein the HARQ-ACK of 1 TB according to the decoding result of PDSCH come really Determine ACK/NACK, and the HARQ-ACK of another TB is occupy-place bit, value can be fixed value, such as value can be NACK/ DTX.Or, it is assumed that for the N of the carrier wave of TB schedulingmax_CBGIt is determined according to the TB numbers of scheduling, then, in this example, carry The first kind DAI=1 of wave 1, the first kind DAI=5 of carrier wave 2 and the first kind DAI not instead of 7,6 of carrier wave 3.Assuming that UE The PDCCH for confiscating carrier wave 2 has received the PDCCH of carrier wave 1 and carrier wave 3.So, UE generate carrier wave 2 HARQ-ACK when, Only need the HARQ-ACK of 1 TB of generation.
In some embodiments, first kind DAI can be used for calculating currently scheduled downgoing time unit (under for example, Row time quantum Ti) and descending carrier (for example, descending carrier Ci) bit of the ACK/NACK bits in HARQ-ACK code books The starting point set.
Corresponding to (2) or (4), downgoing time unit TiWith descending carrier CiACK/NACK bits in HARQ-ACK codes The starting point of bit position in this can be equal to corresponding DAI.In some embodiments, downgoing time unit TiAnd descending carrier CiACK/NACK bit lengths can be the number (corresponding to (2)) of scheduled CBG, or (corresponded to for maximum CBG numbers In (4)).
Corresponding to (1) or (3), downgoing time unit TiWith descending carrier CiACK/NACK bits in HARQ-ACK codes The starting point of bit position in this can subtract downgoing time unit T equal to corresponding DAIiWith descending carrier CiACK/NACK Bit length adds 1.In some embodiments, downgoing time unit TiA descending carrier CiACK/NACK bit lengths can Think the number (corresponding to (1)) of scheduled CBG, or (corresponds to (3)) for maximum CBG numbers.
In some embodiments, as UE feeding back downlink time quantums TiWith descending carrier CiACK/NACK when, be configured For CBG scheduling methods when, first mapped the ACK/NACK of the CBG in first scheduled TB, re-mapped scheduled second The ACK/NACK of CBG in a TB (if it scheduled 2 TB).
In some embodiments, correspond to (1) or (2), it, can when mapping the ACK/NACK of each CBG in a TB According to the index of the CBG of this TB actual schedule, from small to large, to map the ACK/NACK ratios of each scheduled CBG successively It is special.
In some embodiments, correspond to (3) or (4), it, can when mapping the ACK/NACK of each CBG in a TB According to the index of the CBG of this TB, from small to large, to map the ACK/NACK bits of each CBG successively, wherein scheduled The ACK/NACK of CBG determines value according to the decoding result of CBG, and the ACK/NACK of scheduled CBG is not occupy-place bit, can Using predefined value.In addition, downgoing time unit TiWith descending carrier CiThe total length of ACK/NACK bits of all TB can Think Nmax_CBG。
For being configured as TB scheduling methods, corresponding to (1)~(4), the ACK/NACK of first TB can be first mapped, then The ACK/NACK of second TB is mapped, and the ACK/NACK of scheduled TB determines value according to the decoding result of TB, not The ACK/NAC of scheduled TB is occupy-place bit, and predefined value can be used.
Second class DAI, also known as full DAI (i.e. total DAI), may indicate that the total bit number of HARQ-ACK code books, or First downgoing time unit in binding window in all scheduled downgoing time units is fed back to when front lower in HARQ-ACK The sum of the scheduled CBG of all scheduled carrier waves of row time quantum, or feed back in binding window and own in HARQ-ACK All scheduled loads of first downgoing time unit in scheduled downgoing time unit to current downlink time quantum The sum of the maximum CBG of wave, or the sum of the bit number of HARQ-ACK that need to feed back accordingly.
For example, in a downgoing time unit, PDSCH is scheduled on 2 carrier waves, wherein carrier wave 1 is configured as base In the scheduling mode of CBG, the quantity N of maximum CBGmax_CBG=4, carrier wave 2 is configured as the scheduling mode based on TB.Assuming that Carrier wave 1 scheduled 2 TB, and the sum of the CBG of 2 TB scheduling is 3.What if the second class DAI was indicated is given uplink Between first downgoing time unit in the corresponding all scheduled downgoing time units of unit to current downlink time quantum Scheduled CBG sum, then, the second class DAI=3+2=5 of carrier wave 1 and carrier wave 2.What if the second class DAI was indicated It is that first downgoing time unit in all scheduled downgoing time units corresponding with given upstream time unit arrives The sum of the scheduled maximum CBG of current downlink time quantum, then the second class DAI=4+2=6 of carrier wave 1 and carrier wave 2.
It please notes that：For first kind DAI or the second class DAI, due to the limitation of overhead bit, it may be possible to a kind of bit shape State corresponds to the value of multiple DAI.For example, in LTE system, DAI only includes 2 bits, but the practical value of denotable DAI For 1~32 or bigger.In this case, the form of modulus usually may be used, such as DAI=" 00 " can indicate DAI's Value be 1,5,9 ..., 4* (M-1)+1.
The method that another kind determines HARQ-ACK code book total bit numbers, can be not based on DAI, but according to being semi-statically configured Carrier number, HARQ-ACK feedback binding windows, and each downgoing time unit T for being semi-statically configurediWith descending carrier Ci's HARQ-ACK bit numbers come determine HARQ-ACK code books size and bit arrangement sequence.In this case, it is configured to TB tune The carrier wave of degree can determine HARQ-ACK bit numbers, for example, if descending carrier C according to the TB numbers that maximum can be transmittediBy with Be set to it is maximum only have 1 TB, then be 1 bit, if being up to 2 TB, no matter the several TB of actual schedule, be all 2 bits. It is configured to the carrier wave of CBG scheduling, then no matter TB numbers are how many, are all fixed as Nmax_CBG_i。
Although above-described embodiment is mainly the description carried out from the angle of base station, for those skilled in the art For, according to foregoing description, to ensure being properly received for UE, UE need according to the identical or corresponding criterion in base station and method, It determines the DCI received, determines CBG information therein, determination is to be directed to a TB or multiple TB, and in DCI Each CBG indicate that information bit is corresponding and be which CBG of which TB, and receive PDSCH is how to be divided into CB, And it is combined into CBG's.Herein in order to illustrate it is succinct, repeat no more.In addition, in order to ensure the correct feedback of HARQ-ACK, UE It may also need according to the first kind and/or second in the DCI received with the identical or corresponding criterion in base station and method, determination The information of class DAI, either and/or the information of the second class DAI determines HARQ-ACK feedbacks or according to predefined according to the first kind Rule, such as the HARQ-ACK bit numbers of scheduled feedback are fixed as N each timemax_CBGDetermine that HARQ-ACK is fed back, equally not It repeats again.
By using the scheme according to above-described embodiment, the length of the DCI in dispatching every time can be made not with being adjusted The number of the TB of degree and change, reduce the complexity of UE blind examinations PDCCH.In addition, UE is when carrying out HARQ-ACK feedbacks, it is each The bit number of the corresponding HARQ-ACK of PDSCH of secondary scheduling does not also change with scheduled TB numbers, saves HARQ- ACK feedback overheads.In addition, avoiding the PDSCH of the HARQ-ACK or multiple downgoing time units as the PDSCH of multiple carrier waves HARQ-ACK when being fed back in a upstream time unit, as UE missing inspections one or more PDSCH (PDCCH) When, the TB numbers of the PDSCH due to not knowing missing inspection, the caused size that can not determine HARQ-ACK code books or arrangement are suitable The problem of sequence.
The flow of the exemplary method for feeding back HARQ-ACK/NACK is described in detail below in conjunction with Fig. 2 and other attached drawings Figure.Fig. 2 is the flow chart for the exemplary method 200 for being used to feed back HARQ-ACK/NACK according to the embodiment of the present disclosure.As shown in Fig. 2, Method 200 may begin at step S210.Downlink control letter can be received from associated base station in step S210, UE It enables.Next, in step S220, UE according to the downlink control signaling and can be directed to and the downlink control signaling phase The decoding result of corresponding downlink transmission, to generate HARQ-ACK code books.In step S230, UE can be according to being generated HARQ-ACK code books are to base station feedback HARQ-ACK corresponding with downlink transmission.
In some embodiments, following first kind and/or second that UE can include according to downlink control signaling Class DAI (it should be noted that：The first kind herein and/or the second class DAI can with Fig. 1 above in conjunction first kind described and/ Or second class DAI it is different, specifically refer to following definition about the first kind and the second class DAI) and selected reference TB determines the size of HARQ-ACK code books and the ACK/NACK bits of the PDSCH scheduled in the downlink control signaling Position in HARQ-ACK code books.
In some embodiments, if the carrier wave that current downlink time quantum is scheduled is to be configured as at most only dispatching one The operating mode of a TB, such as single antenna SIMO (single input and multi-output) transmission mode then refer to TB can be scheduling this A TB, it is corresponding with DAI.In other words, it can also be understood as not needing to determine with reference to the step for TB.
In further embodiments, if the carrier wave that current downlink time quantum is scheduled is to be configured as most schedulable More than the operating mode of a TB, and TB scheduling methods are configured as, then any one TB can be selected for reference to TB.Example Such as, first TB can be selected for reference to TB, it is corresponding with DAI.In other words, it can also be understood as not needing to determine with reference to TB The step for.
In yet other embodiments, if the carrier wave that current downlink time quantum is scheduled is to be configured as most schedulable More than the operating mode of a TB, and the carrier wave that current downlink time quantum is scheduled is to be configured as CBG scheduling methods Carrier wave then determines that CBG number of which TB actual schedule is most according to Downlink Control Information, and the TB is determined as referring to TB, it is corresponding with DAI.In some embodiments, if CBG number of multiple TB actual schedules is equal, it is multiple that this may be selected Any one TB in TB is corresponding with DAI.
In yet other embodiments, if the carrier wave that current downlink time quantum is scheduled is to be configured as most schedulable More than the operating mode of a TB, and the carrier wave that current downlink time quantum is scheduled is to be configured as CBG scheduling methods Carrier wave, and the HARQ-ACK bit numbers that each TB can be fed back are identical, such as determined all in accordance with the maximum CBG numbers of configuration, then Any one TB can be selected for reference to TB, it is corresponding with DAI.
In some embodiments, the ACK/NACK ratios for the PDSCH scheduled in downlink control signaling of UE feedbacks Special number can be Nmax_TB*NCBG_ref, wherein Nmax_TBFor that under the operating mode being configured, can be scheduled in PDSCH Maximum TB numbers.Nmax_TBTypically 2.For being configured as the carrier wave of CBG scheduling methods, NCBG_refCan be opposite with DAI The CBG numbers for the reference TB actual schedules answered.For being configured as the carrier wave of TB scheduling methods, NCBG_refCan be 1.For quilt It is configured to the carrier wave of CBG scheduling methods, and the HARQ-ACK bit numbers that each TB can be fed back are equal to the maximum CBG numbers of configuration Nmax_CBGWhen, NCBG_refCan be Nmax_CBG。
Alternatively, no matter scheduled carrier wave is configured to work in the scheduling method of CBG or TB, the first kind and/or the Two class DAI can be reference with a fixed TB.Further, what UE was fed back is directed to scheduled in downlink control signaling The number of ACK/NACK bits of PDSCH can be Nmax_TB*Nmax_CBG_ref.For being configured as the load of CBG scheduling methods Wave, Nmax_CBG_refCan be the maximum CBG numbers with reference to TB schedulable corresponding with DAI.Mould is dispatched for being configured as TB The carrier wave of formula, Nmax_CBG_refCan be 1.
It is different from embodiment illustrated in fig. 1, N in the embodiment depicted in figure 2max_CBG_refOr NCBG_refBoth for one For TB.If being scheduled multiple TB in a PDSCH, for example, 2 TB that have been scheduled, then the 2 of a PDSCH The sum of maximum CBG number of a TB is Nmax_CBG_ref*2。
Similarly, if being scheduled 2 TB, CBG number of the actual schedule of 2 TB of a PDSCH is NCBG_TB1+NCBG_TB2, wherein NCBG_ref=max (NCBG_TB1, NCBG_TB2)。
For dispatching the DCI of this PDSCH, the instruction of each CBG of each TB can be independent.For example, for 2 TB, each TB have the bit instruction for each CBG.For example, if Nmax_CBG=Nmax_CBG_ref=4, then there is the instruction of 8 bits, Regardless of base station actual schedule 1 or 2 TB.When base station only scheduled a TB, 4 of a TB not being scheduled Bit does not indicate the information of this TB, can be used for other purposes, or be only used as occupy-place bit.For dispatching this PDSCH DCI, can also the instruction of each CBG of each TB be used in combination, it is without limitation in the disclosure.
In the embodiment depicted in figure 2, first kind DAI, and can be described as counting DAI (counter DAI), it can indicate following One of items：
(1) it is fed back in binding window in HARQ-ACK, to currently scheduled downgoing time unit (for example, downgoing time list First Ti) and current carrier (for example, current carrier Ci) until, the ginseng of each scheduled downgoing time unit and/or descending carrier Examine the number (N of the CBG of TB actual schedulesCBG_refThe sum of)；
(2) it is fed back in binding window in HARQ-ACK, to currently scheduled downgoing time unit (for example, downgoing time list First Ti) and/or current carrier (for example, current carrier Ci) before until a nearest downgoing time unit and/or carrier wave, respectively The sum of a scheduled number of CBG of reference TB actual schedules of downgoing time unit and/or descending carrier adds 1；
(3) it is fed back in binding window in HARQ-ACK, to currently scheduled downgoing time unit (for example, downgoing time list First Ti) and current carrier (for example, current carrier Ci) until, the ginseng of scheduled each downgoing time unit and/or descending carrier Examine the number (N of the maximum CBG of TBmax_CBG_refThe sum of)；And
(4) it is fed back in binding window in HARQ-ACK, to currently scheduled downgoing time unit (for example, downgoing time list First Ti) and/or current carrier (for example, current carrier Ci) before until a nearest downgoing time unit and/or carrier wave, quilt The sum of each downgoing time unit of scheduling and/or the number of maximum CBG of reference TB of descending carrier add 1.
In the embodiment depicted in figure 2, the second class DAI is determined for the total bit number of HARQ-ACK code books, Huo Zhe HARQ-ACK feedbacks bind first downgoing time unit in window in all scheduled downgoing time units to current downlink The sum of the scheduled CBG of all scheduled carrier waves of time quantum, or feed back all quilts in binding window in HARQ-ACK All scheduled carrier waves of first downgoing time unit in the downgoing time unit of scheduling to current downlink time quantum Maximum CBG sum.
In some embodiments, when the binding of Spatial Dimension is not configured in base station, the total bit number of HARQ-ACK code books or The sum of the total or maximum CBG of the scheduled CBG of person can be equal to the second class DAI and Nmax_TBProduct.In some embodiments In, when base station is configured with the binding of Spatial Dimension, the total bit numbers of HARQ-ACK code books either the sum of scheduled CBG or The sum of maximum CBG can be equal to the second class DAI.
In some embodiments, first kind DAI can be used for calculating the ACK/ of currently scheduled downgoing time unit The starting point of bit position of the NACK bits in HARQ-ACK code books.For example, if Nmax_TB=2, then in some embodiments, When the binding of Spatial Dimension is not configured in base station, correspond to (2) or (4), downgoing time unit TiWith descending carrier CiACK/ The starting point of bit position of the NACK bits in HARQ-ACK code books can be multiplied by 2 equal to corresponding DAI and subtract 1 again.Correspond to (1), downgoing time unit TiWith descending carrier CiThe starting point of bit position of the ACK/NACK bits in HARQ-ACK code books can Downgoing time unit T is subtracted to be equal to corresponding DAIiWith descending carrier CiNCBG_ref1 is then added multiplied by with 2.Correspond to (3), downgoing time unit TiWith descending carrier CiThe starting point of bit position of the ACK/NACK bits in HARQ-ACK code books can Downgoing time unit T is subtracted to be equal to corresponding DAIiWith descending carrier CiNmax_CBG_ref1 is then added multiplied by with 2.
In addition, in further embodiments, when base station is configured with the binding of Spatial Dimension, correspond to (2) or (4), Downgoing time unit TiWith descending carrier CiThe starting point of bit position of the ACK/NACK bits in HARQ-ACK code books can wait In corresponding DAI.Corresponding to (1), downgoing time unit TiWith descending carrier CiACK/NACK bits in HARQ-ACK code books The starting point of bit position can subtract downgoing time unit T equal to corresponding DAIiWith descending carrier CiNCBG_refIt adds 1.Corresponding to (3), downgoing time unit TiWith descending carrier CiBit position of the ACK/NACK bits in HARQ-ACK code books Starting point can subtract downgoing time unit T equal to corresponding DAIiWith descending carrier CiNmax_CBG_refAlong with 1.
If the binding of Spatial Dimension is not configured in base station, as UE feeding back downlink time quantums TiWith descending carrier CiACK/ When NACK, the ACK/NACK of the CBG in first TB can be first mapped, the ACK/NACK of the CBG in second TB is re-mapped.
Corresponding to (1) or (2), for each TB, can according to the index of the CBG of actual schedule, from small to large, according to The ACK/NACK bits for the CBG that secondary mapping is each scheduled.When the CBG number that 2 TB are scheduled not simultaneously, for CBG number Occupy-place bit can be transmitted in that smaller TB so that the ACK/NACK bit numbers of this TB are equal to NCBG_ref.For example, scheduled 2 A TB, TBaIt scheduled the 1st, 2,3 CBG, TBbThe the 2nd and the 4th CBG is scheduled, then NCBG_ref=3,6 bit ACKs of feedback/ NACK.First map TBa3 CBG ACK/NACK, re-map TBbThe the 2nd and the 4th CBG ACK/NACK bits, finally reflect Penetrate 1 bit occupy-place bit.
It can be according to this TB's in the ACK/NACK for mapping each CBG in a TB corresponding to (3) or (4) The index of CBG maps the ACK/NACK bits of each CBG successively from small to large, wherein the ACK/NACK roots of scheduled CBG Value is determined according to the decoding result of CBG, and the ACK/NACK of scheduled CBG can not be occupy-place bit and use predefined Value so that the ACK/NACK bit numbers of each TB are equal to Nmax_CBG_ref.Corresponding to (1)~(4), the ACK/ for the TB not being scheduled NACK can be occupy-place bit and use predefined value.
In addition, if base station is configured with the binding of Spatial Dimension, as UE feeding back downlink time quantums TiWith descending carrier Ci's When ACK/NACK, if configuration is TB scheduling methods, the ACK/NACK bits of each scheduled TB can be patrolled Collect with operation.It is alternatively possible to the ACK/NACK of not scheduled TB is set as ACK, and by the ACK/NACK of each TB Bit carries out logical "and" operation.If configuration is CBG scheduling methods, can will be scheduled in each TB, and CBG It indexes identical ACK/NACK and carries out logical "and" operation, i.e., not scheduled CBG is not involved in logical "and" operation.At this moment, UE The number of the ACK/NACK bits for the PDSCH scheduled in downlink control signaling of feedback is Nmax_TB*Nmax_CBG_ref, Wherein Nmax_TB=1.Correspondingly, a kind of relatively reasonable manner, when the CBG scheduling methods being configured tying up using Spatial Dimension Periodically, when and scheduled 2 TB, then UE, which can consider, is used to indicate whether corresponding CB/CBG is scheduled in descending scheduling signaling Bit be shared, i.e., the bit of only one group of CB/CBG instructions for 2 TB, without indicating CB/ to this 2 TB respectively CBG is dispatched.
The binding of configuration space dimension can be a signaling, be not only suitable for TB scheduling methods, be also applied for CBG scheduling Pattern.Alternatively, the binding of configuration space dimension, can be two signal deployments of difference.Alternatively, only a signaling is used for TB tune Degree pattern, CBG scheduling methods are defaulted as needing the binding of Spatial Dimension.
Corresponding to (3) or (4), can will be scheduled in each TB, and CBG indexes identical ACK/NACK progress Logical "and" operates, i.e., not scheduled CBG is not involved in logical "and" operation.For CBG unscheduled in each TB, ACK/NACK can be occupy-place bit.For example, if scheduling 2 TB, and Nmax_CBG=4, TBaIt scheduled #1, #3 CBG, TBbIt adjusts #1, #2 CBG are spent.Then UE common properties give birth to 4 bit ACKs/NACK, correspond to 4 CBG respectively.Wherein, 1 bit ACK/NACK is TBa#1 CBG and TBbThe ACK/NACK of #1 CBG logical "and" operation as a result, 2 bit ACKs/NACK be TBb#2 CBG ACK/NACK, 3 bit ACKs/NACK be TBaThe ACK/NACK of #3 CBG, and the 4th bit is occupy-place bit.Alternative, not The ACK/NACK of scheduled CBG can be ACK, and the ACK/NACK of the identical CBG of CBG indexes in each TB is patrolled Collect with operation.
Corresponding to (1) or (2), for each TB, can according to the index of the CBG of actual schedule, from small to large according to Minor sort obtains virtual CBG indexes j.Then, according to virtual CBG indexes, by the identical CBG of CBG indexes in each TB ACK/NACK carry out logical "and" operation.It is alternatively possible to first by the identical CBG of CBG indexes of actual schedule in each TB ACK/NACK carry out logical "and" operation, if there is the CBG indexes of each TB actual schedules are different, then according to practical tune The index of the CBG of degree, sorts successively from small to large, obtains virtual CBG index j, and according to virtual CBG indexes, will be each The ACK/NACK of the identical CBG of CBG indexes in TB carries out logical "and" operation.
For example, for 2 TB, TBaIt scheduled CBG#1, CBG#3, #4, and TBbIt scheduled CBG#1, CBG#2, CBG#4.That , feed back 3 bit ACKs/NACK, wherein the 1st bit of HARQ-ACK code books can be TBaCBG#1 and TBbCBG#1 It can be TB that ACK/NACK, which asks logical "and", the 2nd bit,aCBG#4 and TBbThe ACK/NACK of CBG#4 seek logical "and", and 3rd bit can be TBaCBG#3 and TBbThe ACK/NACK of CBG#2 seek logical "and".
For example, it is assumed that the binding of Spatial Dimension is not configured, the time span of HARQ-ACK feedback binding windows is a downlink Time quantum, and frequency domain dimension has 3 carrier waves.In a downgoing time unit, base station can be to dispatch on 2 carrier waves wherein PDSCH, wherein carrier wave 1 are configured as the scheduling mode based on CBG, and the quantity N of maximum CBGmax_CBG_C1=4, and carrier wave 2 It is configured as the scheduling mode based on TB, and Nmax_CBG_C2=1.In addition, carrier wave 3 is configured as the scheduling mode based on CBG, and The quantity N of maximum CBGmax_CBG_C3=6.Assuming that carrier wave 1 scheduled 2 TB, wherein TBa1 CBG (for example, #3) is scheduled, TBbIt scheduled 2 CBG (for example, #1 and #2).
So, according to method (1) or (2), the corresponding TB of DAI can be TBb, and NCBG_ref_C1=2, and according to side Method (3) or (4), the corresponding TB of DAI can (selection TB one optionalbOr TBaIt is fully equivalent, because what base station configured Maximum CBG number is the same for each TB), such as TBa, and Nmax_CBG_C1=4.Carrier wave 2 scheduled 1 TBc, then according to method (1)~(4), the corresponding TB of DAI can be TBc, NCBG_ref_C2=1, Nmax_CBG_C2=1.
According to method (1), as shown in fig. 7, the first kind DAI of carrier wave 1 can be 2, the first kind DAI of carrier wave 2 can be 3, the second class DAI of carrier wave 1 and carrier wave 2 can be 3.The HARQ-ACK codebook sizes of UE feedbacks can be 6 bits.
In some embodiments, carrier wave 1 accounts for 4 bits, wherein TBaThere is 2 bit ACKs/NACK, in HARQ-ACK code books 1st bit determines ACK/NACK values according to the testing result of the CBG of scheduling, and the 2nd bit is occupy-place bit.TBbThere are 2 bits ACK/NACK, the 3rd and the 4th bit in HARQ-ACK code books determine ACK/NACK values according to the testing result of the CBG of scheduling.
In some embodiments, carrier wave 2 accounts for 2 bits, TBcThere is 1 bit ACK/NACK, the in HARQ-ACK code books the 5th Bit is according to the TB of schedulingcTesting result determine ACK/NACK values, and the 6th bit in HARQ-ACK code books is occupy-place Bit.
According to method (2), the first kind DAI of carrier wave 1 can be 1, and the first kind DAI of carrier wave 2 can be 3, carrier wave 1 and load Second class DAI of wave 2 can be 3.The bit map of ACK/NACK can be identical as the ACK/NACK bit maps of (1).
According to method (3), in the example of Fig. 7, if Nmax_CBG_C1What is indicated is the maximum CBG numbers of a PDSCH, or It is interpreted as the bit number of a PDSCH feedbacks HARQ-ACK, then, when scheduled 2 TB, it is assumed that each TB has 4 CBG then carries out the binding of CBG dimensions inside each TB.As shown in figure 9, TBaThe the 1st and the 2nd CBG binding, the 3rd and the 4th CBG is bound, TBbThe the 1st and the 2nd CBG bindings, the 3rd and the 4th CBG binding.It can select TBbOr TBaTo refer to TB, that The first kind DAI of carrier wave 1 is 2.The first kind DAI of carrier wave 2 is 3, and the second class DAI of carrier wave 1 and carrier wave 2 is 3.UE feedbacks HARQ-ACK codebook sizes are 6 bits.It is not difficult to find out, the carrier wave and CBG scheduling for TB scheduling and actual schedule 2 The carrier wave of a TB, the counting of first kind DAI is the counting with reference to TB, but CBG is dispatched and the practical load that only scheduled 1 TB Wave, number/2 of the CBG for being counted as this TB of DAI.Another situation, as shown in Figure 10, carrier wave 1 most schedulable, 2 TB, Carrier wave 1 is practical only to scheduled TBa, the 3rd CBG.The HARQ-ACK of so this TB feedbacks is 4 bits, wherein the 3rd bit root HARQ-ACK is determined according to decoding result, and predefined occupy-place bit can be transmitted in other 3 bits.The first kind DAI=2 of carrier wave 1, Second class DAI=3.The first kind DAI of carrier wave 2 is 3, and the second class DAI is 3.Such benefit is that can have effective reduction DAI Expense.The size of HARQ-ACK code books is the second class DAI*2.If Nmax_CBG_C1=4 indicate is the maximum of TB CBG numbers, then in the example of Fig. 7, the first kind DAI of carrier wave 1 can be 4, and the first kind DAI of carrier wave 2 can be 5,1 He of carrier wave Second class DAI of carrier wave 2 can be 5.The HARQ-ACK codebook sizes of UE feedbacks are 10 bits.In some embodiments, carrier wave 1 Account for 8 bits, TBaThere is 4 bit ACKs/NACK, the 3rd bit in HARQ-ACK code books is according to the detection knot of the #3 CBG of scheduling Fruit determines ACK/NACK values, the 1st, 2,4 bits be occupy-place bit.TBbThere is 4 bit ACKs/NACK, in HARQ-ACK code books The the 5th and the 6th bit ACK/NACK values are determined according to the testing result of #1 CBG and the #2 CBG of scheduling, the 7th, 8 bits be Occupy-place bit.In some embodiments, carrier wave 2 accounts for 2 bits, TBcThere is 1 bit ACK/NACK, the in HARQ-ACK code books the 9th Bit is according to the TB of schedulingcTesting result determine ACK/NACK values, and the 10th bit in HARQ-ACK code books is Occupy-place bit.
According to method (4), as shown in figure 8, Nmax_CBG_C1=4 indicate be a TB maximum CBG numbers, carrier wave 1 First kind DAI can be 1, and the first kind DAI of carrier wave 2 can be 5, and the second class DAI of carrier wave 1 and carrier wave 2 can be 5.HARQ- The total bit number of ACK/NACK code books is 10.
It should be noted that：For the first kind or the second class DAI, due to the limitation of overhead bit, it may be possible to a kind of ratio Special state corresponds to the value of multiple DAI.In LTE system, DAI can only include 2 bits, but denotable DAI actually takes Value is 1~32 or bigger.In this case, the form of modulus usually can be used, such as DAI=" 00 " indicates taking for DAI Value for 1,5,9 ..., 4* (M-1)+1.In another example can be according to the transmissible maximum HARQ-ACK bit numbers of each PDSCH most Big common divisor is step-length, determines the value of DAI.Assuming that Nmax_CBGPossible value is 2 and 4.So, step-length 2, the second class DAI=" 000 " indicates that the value of DAI is 2 ... 16* (M-1)+2, DAI=" 001 " indicates that the value of DAI is 4...16* (M- 1)+4, DAI=" 010 " indicate that the value of DAI is that 6...16* (M-1)+6, DAI=" 110 " indicates that the value of DAI is 14...16* (M-1)+14, DAI=" 111 " indicates that the value of DAI is 16...16* (M-1)+16.Above-described embodiment mainly from The description that the sides UE carry out.But it is not difficult to find out：In order to ensure that the correct of HARQ-ACK sends and receives, base station also need to according to UE phases The value of first kind DAI therein and/or the second class DAI, Yi Jijie when same or corresponding criterion sends DCI with method to determine The mapping relations of the size and ACK/NACK bits of HARQ-ACK code books are determined when receiving HARQ-ACK code books.
In some embodiments, if base station is UE, to be configured at least one carrier wave be CBG scheduling methods, and base station cannot This carrier wave is configured for this UE bind (spatial bundling) in the HARQ-ACK of Spatial Dimension simultaneously.
In some embodiments, when being more than PUCCH used comprising the uplink control signaling including HARQ-ACK The max number of bits that format can carry, the then binding relative to CBG dimensions, UE can preferentially carry out the HARQ-ACK of Spatial Dimension Binding.Alternatively, relative to the binding of Spatial Dimension, UE can preferentially carry out the binding of CBG dimensions.The binding of CBG dimensions be by After the HARQ-ACK of multiple CBG of one TB carries out logical "and" operation, 1 bit HARQ-ACK is generated.The HARQ- of Spatial Dimension ACK binding be by according to the embodiment of the present disclosure describe when base station be configured with Spatial Dimension HARQ-ACK bind when method into Row.
In some embodiments, it can be bound by the HARQ-ACK of CBG dimensions, to realize the carrier wave dispatched based on CBG HARQ-ACK bit numbers be a fixed value Nmax_harq, change without the quantity with the TB of actual schedule.The fixed value, It is that base station configures, or mark is predefined.It can be realized according at least one of following methods：
If Nmax_harq=Nmax_CBG, and Nmax_CBGMaximum for the CBG of all TB once dispatched is total, then often The corresponding HARQ-ACK bit numbers of a TB are Nmax_harq/Nmax_TB.The TB of scheduling generates ACK/NACK according to decoding result, does not adjust The TB of degree sends Nmax_CBG_TBiThe occupy-place bit of bit, the predefined occupy-place bit can be NACK or ACK.
If Nmax_harq=Nmax_CBG, and Nmax_CBGFor the maximum sum of the CBG of the TB once dispatched, then may be used According to method as described below, to realize that the sum of the corresponding HARQ-ACK bit numbers of all TB once dispatched remain as Nmax_CBG.For example, when scheduled 2 TB, although the maximum CBG numbers of each TB schedulable are Nmax_CBG=4, but each TB HARQ-ACK bit numbers be Nmax_CBG/ 2=2.A kind of realization method, can be according to predefined criterion, by multiple CBG's HARQ-ACK is carried out and operation, i.e., the HARQ-ACK of multiple CBG is carried out bundling.For example, when scheduled 2 TB, it is false If first TB scheduled 4 CBG, second TB scheduled 3 CBG, then the HARQ-ACK of preceding 2 CBG of first TB It carries out and operates, the HARQ-ACK for obtaining 1 bit HARQ-ACK, rear 2 CBG is carried out and operation, obtains 1 bit HARQ-ACK. The HARQ-ACK of preceding 2 CBG of second TB is carried out and operation, obtains the 3rd of 1 bit HARQ-ACK and second TB The HARQ-ACK of CBG is 1 bit.In another example when scheduled 2 TB, it is assumed that first TB scheduled the 2nd, the 3rd CBG, the Two TB scheduled the 3rd CBG.Assuming that the current scheduling of DAI instructions, which shares 3 CBG or the current scheduling of instruction, need to feed back 3 bits HARQ-ACK, then be not necessarily to bundling.In another example when scheduled 2 TB, it is assumed that first TB scheduled 4 CBG, the Two TB scheduled the 3rd CBG.Assuming that the current scheduling of DAI instructions, which shares 3 CBG or the current scheduling of instruction, need to feed back 3 bits HARQ-ACK, then, and the HARQ-ACK bundling of the 1st, 2 CBG of first TB, the HARQ-ACK of the 3rd, 4 CBG The 3rd CBG of bundling and second TB generates the HARQ-ACK of a bit.
Preferably, the CBG of different TB, without bundling.
Preferably, the CBG not being scheduled, is not involved in bundling.For example, when scheduled 2 TB, it is assumed that first TB scheduled the the 1st and the 3rd, the 4th CBG, and second TB scheduled the 1st CBG, then, the 2nd CBG of first TB does not join 1 bit HARQ-ACK is corresponded to bundling, first CBG, the 3rd, 4 CBG is carried out and operation obtains 1 bit HARQ-ACK, The 1st CBG of second TB corresponds to 1 bit HARQ-ACK, and generates 1 occupy-place bit.The occupy-place bit is predefined Value, such as value be NACK.
Preferably, the CBG not dispatched participates in bundling.The CBG not dispatched if dispatched before, and has become Work(decodes, then is ACK, is otherwise NACK.
The bundling of CBG dimensions described above, can be with the method knot of the second classes of first kind DAI/ DAI of the present invention It closes.As shown in figure 11, DAI uses CBG to be counted for granularity, and is carried out to the CBG number of all TB of each PDSCH It counts.Assuming that the total bit number N of 1 scheduled feedback HARQ-ACK of carrier wavemax_harq=4, base station scheduled 2 TB, and each TB is equal 4 CBG, TB can be divided intoaIt scheduled the 3rd CBG, TBbIt scheduled the 1st, 2 CBG.Carrier wave 2 scheduled a TBc.So, it carries The first kind DAI of wave 1 is 1, and the first kind DAI of carrier wave 2 is 5, and the second class DAI of carrier wave 1 and carrier wave 2 is 5, statement UE feedbacks HARQ-ACK codebook sizes are 5 bits.Wherein, carrier wave 1 accounts for 4 bits, TBaAnd TBbA 2 bit, TBaThe first bit be occupy-place Bit, TBaThe second bit according to the testing result of CBG3 generate ACK/NACK, TBbThe first bit be CBG1 and CBG2 inspection The ACK/NACK for surveying result is carried out with operation as a result, TBbThe second bit be occupy-place bit.Carrier wave 2 accounts for 1 bit, TBcThere is 1 ratio Special ACK/NACK, the 5th bit in HARQ-ACK code books is according to the TB of schedulingcTesting result determine ACK/NACK values. In this example, although carrier wave 2 maximum can dispatch 2 TB, the HARQ-ACK bit numbers of carrier wave 2 are according to actual schedule TB numbers determine.If according to another method of the present invention, being configured to HARQ- for being configured as the carrier wave of TB scheduling ACK bit length is 2, then the HARQ-ACK code book sizes in this example are 6 bits, wherein the 6th bit is occupy-place bit.
By above method, when can make HARQ-ACK code books with scheduled carrier number, scheduled downlink Between unit number variation and change.
In addition, in another method for determining HARQ-ACK code books, the sizes of HARQ-ACK code books can by may to The configuration of HARQ-ACK or activation descending carrier number, downgoing time are fed back on fixed upstream time unit/up-link carrier Unit number determines.In addition, can also be determined by the maximum CBG numbers of these descending carriers/downgoing time unit.It in other words, can be with It sums to these three dimensions.Pay attention to：The maximum CBG numbers of each descending carrier and/or downgoing time unit can be identical, can also It is different.If at least one descending carrier is configured as working in the operating mode of more TB, and space dimension is not configured in base station When the binding of degree, then HARQ-ACK codebook sizes can be on the basis of these three dimensions be summed, multiplied by with the maximum of schedulable TB numbers.The maximum TB numbers of schedulable are identical for all descending carriers and/or downgoing time unit.If base station configures The identical ACK/NACK of each CBG call numbers of each TB is then carried out logical "and" operation by the binding of Spatial Dimension.
In addition, in another method for determining HARQ-ACK code books, HARQ-ACK code books can be determined according to third class DAI Size.The content of third class DAI instruction is identical as the content of the second class DAI instructions or what third class DAI was indicated is base station It is expected that the total bit number of the HARQ-ACK/NACK code books received, and the corresponding HARQ-ACK/ of PDSCH of base station actual schedule The total bit number of NACK is less than or equal to the expected total bit number.When HARQ-ACK is sent on PUSCH, if PUSCH It needs to carry out rate-matched according to HARQ-ACK code books, the size of the HARQ-ACK code books is indicated by third class DAI.
In addition, in above method, the HARQ-ACK for the PDSCH which downgoing time unit how determined is not limited one It is fed back in a upstream time unit.For example, can according to the prior art come determine, according to the uplink and downlink that is semi-statically configured match come Determine or determined according to the HARQ-ACK feedback times indicated in downlink control signaling etc..
In addition, in some embodiments, when UE is configured as executing the feedbacks of the HARQ-ACK based on CBG, in fact it could happen that The case where CRC check of each CBG is correct in one TB, but the CRC check of the TB but fails.In order at least partly solve Certainly or mitigate this problem, UE can carry out HARQ-ACK feedbacks one of in the following way.
HARQ-ACK feedback systems one
In some embodiments, UE can not only feed back the HARQ-ACK of CBG, can also feed back the HARQ-ACK of TB.It should The ACK/NACK bits of TB can be located at the position that HARQ-ACK code books start, or positioned at the position that HARQ-ACK code books terminate It sets.
For example, when UE has been scheduled 2 TB, for example, HARQ-ACK code books bit sequence be TB1 ACK/NACK bits, The ACK/NACK bits of the #1 CBG of TB1, the #2 CBG of TB1 ACK/NACK bits ..., the #N of TB1max_CBGThe ACK/ of CBG NACK bits, the ACK/NACK bits of TB2, TB2 #1 CBG ACK/NACK bits ..., the #N of TB2max_CBGCBG's ACK/NACK bits, wherein Nmax_CBGFor the maximum CBG numbers of each TB.
HARQ-ACK is fed backMode two
In some embodiments, UE can feed back the HARQ-ACK of CBG, and the bit long of the HARQ-ACK of UE feedbacks CBG Degree can be Nmax_CBG*Nmax_TB.If using the binding of Spatial Dimension, UE can feed back the HARQ-ACK of CBG, and UE The bit length for feeding back the HARQ-ACK of CBG can be Nmax_CBG.For convenience, it is described below with single TB.If current PDSCH scheduling be a complete TB, that is, scheduled all CBG of a TB, then when UE has found the CRC check of all CBG Correctly, when but the CRC check of TB is incorrect, the ACK/NACK of all CBG can be set as NACK by UE.In addition, if TB CRC check is also correct, then the ACK/NACK of all CBG can be set as ACK by UE.
In addition, in some embodiments, if current scheduling only scheduled part TB, that is, scheduled the part of a TB CBG, and UE has found that the CRC check of all CBG of this TB is correct so far, but the CRC check of the TB is not just Really, then UE can determine the value of ACK/NACK according at least one following three kinds of methods：
(1) NACK is fed back for all CBG；
(2) ACK will have been fed back, and the ACK/NACK bit values of unscheduled CBG are in current this time scheduling NACK；
(3) ACK will have been fed back, and the ACK/NACK bit values of unscheduled CBG are in current this time scheduling It is different from predefined occupy-place bit value.For example, if predefined occupy-place bit value is NACK, it is in this case anti- Present ACK；, whereas if predefined occupy-place bit value is ACK, then NACK is fed back in this case.
For example, scheduled CBG can determine ACK/NACK values according to the CRC check result of corresponding CBG, not by The ACK/NACK bits value of the correct CBG of scheduling can be equal to the value of ACK.In addition, when UE has found the CRC check knot of TB When the check results of fruit and CBG are inconsistent, the ACK/NACK of all CBG of this TB can be set as NACK by UE.For example, false If the CBG numbers of maximum schedulable are 4.In downgoing time unit T1, base station scheduled the initial transmission of a TB, this TB points are 4 CBG.If UE has received this TB, wherein the CRC check of #1 and #2 CBG fails, the CRC check of #3 and #4 CBG at Work(, then the HARQ-ACK of UE feedbacks can be：NACK,NACK,ACK,ACK.Base station scheduled this in downgoing time unit T2 The re-transmission of a TB, scheduled #1 and #2 CBG, and UE has received this TB.If the CRC check of #1 and #2 CBG is correct, but TB CRC check failure.At this point, the HARQ-ACK of UE feedbacks can be：NACK,NACK,NACK,NACK.
In addition, in some embodiments, if current scheduling only scheduled part TB, that is, scheduled the part of a TB CBG, and UE has found that the CRC check of all CBG of this TB is correct so far, and the CRC check of TB is also just Really, then UE can determine the value of ACK/NACK according to one of following two methods：
(1) ACK/NACK of all CBG is set as ACK；
(2) all current ACK/NACK for this time transmitting scheduled CBG are set as ACK, and the ACK/ of other CBG NACK is the value of occupy-place bit.
In some embodiments, when actually alienable CBG numbers are less than N to a TBmax_CBGWhen, it is only applicable to upper type The corresponding HARQ-ACK bits of practical alienable CBG numbers, without limit other HARQ-ACK how value, for example, Nmax_CBG =4, current TB only may be partitioned into 2 CBG, and when TB crc errors occur, 2 bit HARQ-ACK are set as NACK, in addition 2 ratio Special value standard does not limit；Alternatively, being suitable for N with upper typemax_CBGA HARQ-ACK bits, for example, Nmax_CBG=4, when Preceding TB only may be partitioned into 2 CBG, and when TB crc errors occur, 4 bit HARQ-ACK are set as NACK.
In some embodiments, when the CRC check of all CBG of UE couples of TB is correct, UE is just to TB's CRC is verified.
The method of above-described embodiment can be used together in conjunction with embodiment illustrated in fig. 1 and/or embodiment illustrated in fig. 2, such as Mode according to Fig.2, the HARQ-ACK values of the determining CBG not being scheduled, is combined with embodiment shown in FIG. 1, It can be used in combination with other technologies.
Figure 12 is the frame according to the exemplary hardware arrangement of the example network node and/or user equipment of the embodiment of the present disclosure Figure.Hardware layout 1200 may include processor 1206.Processor 1206 can be performed for the difference of flow described herein The single treatment unit of action either multiple processing units.Arrangement 1200 can also include for receiving signal from other entities Input unit 1202 and for other entities provide signal output unit 1204.Input unit 1202 and output are single Member 1204 can be arranged to the entity that single entities either detach.
In addition, arrangement 1200 may include having non-volatile or form of volatile memory at least one readable storage Medium 1208, e.g. electrically erasable programmable read-only memory (EEPROM), flash memory, CD, Blu-ray disc and/or hard drive Device.Readable storage medium storing program for executing 1208 may include computer program 1210, which may include that code/computer can Reading instruction makes hardware layout 1200 and/or including hardware layout when being executed by the processor 1206 in arrangement 1200 Equipment including 1200 can execute for example above in conjunction with flow described in Fig. 1 and/or Fig. 2 and its any deformation.
Computer program 1210 can be configured with the calculating of such as computer program module 1210A~1210C frameworks Machine program code.Therefore, use hardware layout 1200 as the computer program in the example embodiment of base station, arranging 1200 In code may include：Module 1210A, for the number according to the transmission block (TB) being scheduled in the downlink transmission to be transmitted The maximum number for the encoding block group (CBG) that can divide in mesh and the downlink transmission, to determine the downlink transmission The maximum number for the CBG that can divide in each TB.Code in computer program may also include：Module 1210B, for being based on The maximum number for the CBG that can divide in each TB of the downlink transmission, to determine the CBG's being scheduled in corresponding TB CBG is configured.Code in computer program may also include：Module 1210C, the downlink control for sending instruction CBG configurations Signaling processed.However, can also include each step for executing various methods described herein in computer program 1210 Other modules.
In addition, use hardware layout 1200 as the computer journey in the example embodiment of user equipment, arranging 1200 Code in sequence may include：Module 1210A, for receiving downlink control signaling.Code in computer program can also wrap It includes：Module 1210B, for according to downlink control signaling and for downlink corresponding with downlink control signaling The decoding result of transmission, to generate HARQ-ACK code books.Code in computer program may also include：Module 1210C is used for root HARQ-ACK corresponding with downlink transmission is fed back according to the HARQ-ACK code books generated.However, computer program Can also include other modules of each step for executing various methods described herein in 1210.
Computer program module can substantially execute each action in the flow shown in Fig. 1 and/or Fig. 2, with Simulate various equipment.In other words, when executing different computer program modules in processor 1206, they can correspond to this The various different units for the various equipment being previously mentioned in text.
Although being implemented as computer program module above in conjunction with the code means in Figure 12 the disclosed embodiments, The execution of hardware layout 1200 is made to be acted above in conjunction with described in Fig. 1 and/or Fig. 2 when being executed in processor 1206, however In alternative embodiment, at least one in the code means can at least be implemented partly as hardware circuit.
Processor can be single cpu (central processing unit), but can also include two or more processing units.Example Such as, processor may include general purpose microprocessor, instruction set processor and/or related chip group and/or special microprocessor (example Such as, application-specific integrated circuit (ASIC)).Processor can also include the onboard storage device for caching purposes.Computer program can To be carried by being connected to the computer program product of processor.Computer program product may include being stored thereon with computer The computer-readable medium of program.For example, computer program product can be flash memory, random access memory (RAM), read-only deposit Reservoir (ROM), EEPROM, and above computer program module can use the form quilt of the memory in UE in an alternative embodiment It is distributed in different computer program products.
So far preferred embodiment is had been combined the disclosure is described.It should be understood that those skilled in the art are not In the case of being detached from spirit and scope of the present disclosure, various other changes, replacement and addition can be carried out.Therefore, the disclosure Range be not limited to above-mentioned specific embodiment, and should be defined by the appended claims.
In addition, being described herein as the function of being realized by pure hardware, pure software and/or firmware, can also lead to The modes such as the combination of specialized hardware, common hardware and software are crossed to realize.For example, being described as through specialized hardware (for example, existing Field programmable gate array (FPGA), application-specific integrated circuit (ASIC) etc.) come the function realized, it can be by common hardware (in for example, Central Processing Unit (CPU), digital signal processor (DSP)) and the mode of combination of software realize that vice versa.

Claims (15)

1. a kind of method of the schedule downlink transmissions executed at network node, including：
According in the number and the downlink transmission of the transmission block TB that can be scheduled in the downlink transmission to be transmitted The maximum number for the encoding block group CBG that can divide, the CBG that can divide in each TB to determine the downlink transmission Maximum number；
The maximum number for the CBG that can divide in each TB based on the downlink transmission, is adjusted to determine in corresponding TB The CBG of the CBG of degree is configured；And
Send the downlink control signaling for indicating the CBG configurations.
2. according to the method described in claim 1, wherein, the maximum number for the CBG that can divide in the downlink transmission It is configured, and not become with the number for the TB that can be scheduled in the downlink transmission by high-level signaling Change；
Wherein, the number of the TB that can be scheduled, is configured, or configured by physical layer signaling by high-level signaling.
3. according to the method described in claim 1, wherein, according to the transmission that can be scheduled in the downlink transmission to be transmitted The maximum number for the encoding block group CBG that can divide in the number of block TB and the downlink transmission, to determine the downlink The step of maximum number for the CBG that can divide in each TB of link transmission includes at least one of following：
If the downlink transmission only dispatches a TB, by the maximum number for the CBG that can divide in one TB It is determined as being equal to the maximum number for the CBG that can divide in the downlink transmission；
If the downlink transmission can dispatch two TB, determine the CBG's that can divide of described two TB respectively Maximum number so that described two TB are able to the sum of maximum number of CBG of segmentation and are equal in the downlink transmission The maximum number for the CBG that can divide and described two TB be able to segmentation CBG maximum number it is equal or difference 1.
4. according to the method described in claim 1, wherein, indicating that the downlink control signaling of the CBG configurations includes following At least one of：
For the independent field of each CBG, it is used to indicate whether corresponding CBG is scheduled；
For the independent field of each CBG, it is used to indicate whether that the hybrid automatic repeat-request HARQ for needing to empty corresponding CBG is slow Rush area；
For the independent field of the multiple CBG of correspondence, it is used to indicate whether that the mixed automatic retransfer for needing to empty the multiple CBG is asked Ask harq buffer area；
First kind downlink distribution index DAI；And
Second class DAI.
5. according to the method described in claim 4, wherein, first kind DAI is used to indicate one of the following terms：
It is fed back in binding window in HARQ-ACK, it is scheduled until currently scheduled downgoing time unit and current carrier The sum of number of CBG；
It is fed back in binding window in HARQ-ACK, it is nearest before arriving currently scheduled downgoing time unit and/or current carrier Until one downgoing time unit and/or carrier wave, the sum of scheduled number of CBG+1；
It is fed back in binding window in HARQ-ACK, it is scheduled until currently scheduled downgoing time unit and current carrier The sum of the number of the maximum CBG of downgoing time unit and/or descending carrier；And
It is fed back in binding window in HARQ-ACK, it is nearest before arriving currently scheduled downgoing time unit and/or current carrier Until one downgoing time unit and/or carrier wave, the number of the maximum CBG of scheduled downgoing time unit and/or descending carrier The sum of mesh+1.
6. according to the method described in claim 4, wherein, the second class DAI is used to indicate one of the following terms：
The total bit number of HARQ-ACK code books；
First downgoing time unit in binding window in all scheduled downgoing time units is fed back to working as in HARQ-ACK The sum of the scheduled CBG of all scheduled carrier waves until preceding downlink time quantum；And
First downgoing time unit in binding window in all scheduled downgoing time units is fed back to working as in HARQ-ACK The sum of the maximum CBG of all scheduled carrier waves until preceding downlink time quantum.
7. a kind of network node of schedule downlink transmissions, including：
Encoding block group maximum number determination unit, for according to the transmission block that can be scheduled in the downlink transmission to be transmitted The maximum number for the encoding block group CBG that can divide in the number of TB and the downlink transmission, to determine the downlink chain The maximum number for the CBG that can divide in each TB of road transmission；
CBG configures determination unit, the maximum number of the CBG for that can divide in each TB based on the downlink transmission Mesh, to determine the CBG configurations for the CBG being scheduled in corresponding TB；And
Control signaling transmission unit, for sending the downlink control signaling for indicating the CBG configurations.
8. a kind of method for feeding back hybrid automatic repeat-request affirmative acknowledgement HARQ-ACK executed at user equipment (UE), Including：
Receive downlink control signaling；
According to the ginseng in the downlink control signaling, downlink transmission corresponding with the downlink control signaling Transmission block and the decoding result for the downlink transmission are examined, to generate HARQ-ACK code books；And
HARQ-ACK corresponding with the downlink transmission is fed back according to the HARQ-ACK code books generated.
9. according to the method described in claim 8, wherein, the downlink control signaling includes at least one of following：
First kind downlink distribution index DAI；
Second class DAI；
The number of transport blocks purpose information being based on for determining feedback HARQ-ACK；
The maximum number for the encoding block group CBG that can divide in transmission block TB；And
Whether HARQ-ACK feedbacks carry out Spatial Dimension binding.
10. according to the method described in claim 9, wherein, in the transmission of the same uplink, with can be scheduled with The number for feeding back the transmission block of at least one carrier wave of HARQ-ACK is more than in the case of 1：
If the downlink control signaling instruction is bound without Spatial Dimension, the transmission that HARQ-ACK is based on is fed back Block number mesh is equal to 2；
If the downlink control signaling instruction carries out Spatial Dimension binding, the transmission block that HARQ-ACK is based on is fed back Number is equal to 1.
11. according to the method described in claim 10, wherein, for the ACK/ negative responses NACK of the downlink transmission Bit length is：
The number of transport blocks purpose product that the maximum number for the CBG that can divide in TB is based on feedback HARQ-ACK；
The number of the CBG of reference transmission block institute actual schedule multiplies with the feedback HARQ-ACK number of transport blocks purposes being based on Product.
12. according to the method for claim 11, wherein the reference transmission block is that the number of the CBG of actual schedule is maximum Transmission block.
13. according to the method described in claim 9, wherein, according to the downlink control signaling, with the downlink control Reference transmission block in the corresponding downlink transmission of signaling processed and the decoding result for the downlink transmission, Include the step of HARQ-ACK code books to generate：
According to the first kind DAI of the downlink control signaling, determine the ACK/NACK of the downlink transmission described Starting point in HARQ-ACK code books,
Wherein, according to the first kind DAI of the downlink control signaling, determine that the ACK/NACK of the downlink transmission exists The step of starting point in the HARQ-ACK code books includes one of the following terms：
The starting point of bit position of the ACK/NACK bits of the downlink transmission in the HARQ-ACK code books is determined For the first kind DAI of the downlink control signaling；
The starting point of bit position of the ACK/NACK bits of the downlink transmission in the HARQ-ACK code books is determined It subtracts the ACK/NACK bit lengths of the downlink transmission for the first kind DAI of the downlink control signaling and adds 1；
The starting point of bit position of the ACK/NACK bits of the downlink transmission in the HARQ-ACK code books is determined It is subtracted again for first kind DAI and feedback HARQ-ACK the number of transport blocks purpose product being based on of the downlink control signaling 1；And
The starting point of bit position of the ACK/NACK bits of the downlink transmission in the HARQ-ACK code books is determined Institute is subtracted for first kind DAI and feedback HARQ-ACK the number of transport blocks purpose product being based on of the downlink control signaling The ACK/NACK bit lengths for stating downlink transmission add 1.
14. according to the method described in claim 8, wherein, according to the downlink control signaling, with the downlink control Reference transmission block in the corresponding downlink transmission of signaling processed and the decoding result for the downlink transmission, Include at least one of following to generate the step of HARQ-ACK code books：
If the downlink transmission scheduled all CBG of a TB, determining that the CRC check of all CBG is correct In the case of：If the CRC check of one TB is incorrect, the ACK/NACK of all CBG is set as NACK, if described The CRC check of one TB is correct, then the ACK/NACK of all CBG is set as ACK,
If all CBG of the unscheduled TB of downlink transmission, and until the current scheduling moment, it is one The CRC check of all CBG of TB is correct, but the CRC check of the TB is incorrect, then is determined according to one of the following terms The value of ACK/NACK：NACK is fed back for all CBG；It will feed back unscheduled in ACK and current this time scheduling The ACK/NACK bit values of CBG are NACK；And CBG unscheduled in ACK and current this time scheduling will be fed back ACK/NACK bit values be it is opposite with predefined occupy-place bit value.
15. a kind of user equipment (UE) for feeding back hybrid automatic repeat-request affirmative acknowledgement HARQ-ACK, including：
Control signaling receiving unit, for receiving downlink control signaling；
Code book generation unit, for according to the downlink control signaling, corresponding with the downlink control signaling Reference transmission block in downlink transmission and the decoding result for the downlink transmission, to generate HARQ-ACK Code book；And
Feedback unit, it is corresponding with the downlink transmission for being fed back according to the HARQ-ACK code books generated HARQ-ACK。
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