CN111147192A - Timing determination method of HARQ-ACK information and network terminal - Google Patents

Timing determination method of HARQ-ACK information and network terminal Download PDF

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CN111147192A
CN111147192A CN201811298549.8A CN201811298549A CN111147192A CN 111147192 A CN111147192 A CN 111147192A CN 201811298549 A CN201811298549 A CN 201811298549A CN 111147192 A CN111147192 A CN 111147192A
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pdsch
harq
ack
pdcch
time domain
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CN111147192B (en
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闫志宇
杜滢
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China Academy of Information and Communications Technology CAICT
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China Academy of Information and Communications Technology CAICT
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Priority to PCT/CN2019/115045 priority patent/WO2020088657A1/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
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • 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]

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  • Engineering & Computer Science (AREA)
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  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The application provides a timing determination method of HARQ-ACK and terminal equipment, and the method comprises the following steps: receiving a PDCCH sent by network equipment, and determining an alternative value set of timing difference between a PDSCH and HARQ-ACK according to a first field of the PDCCH; determining the value of the timing difference between the PDSCH and the HARQ-ACK in the determined alternative value set of the timing difference between the PDSCH and the HARQ-ACK; and sending the HARQ-ACK information aiming at the PDSCH at the time position corresponding to the determined value. The method solves the problems of overweight signaling load and lower efficiency when the network equipment sends the timing difference between the HARQ-ACK and the PDSCH.

Description

Timing determination method of HARQ-ACK information and network terminal
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a timing determination method for hybrid automatic repeat request-acknowledgement (HARQ-ACK) information and a network terminal.
Background
The use of the HARQ mechanism in the NR system improves the efficiency of data transmission. The network equipment sends downlink service data through a Physical Downlink Shared Channel (PDSCH), and after receiving the information service data, the terminal equipment feeds back Acknowledgement (ACK) or non-acknowledgement (NACK) information received by the terminal equipment for the downlink service data on a Physical Uplink Control Channel (PUCCH) or a Physical Uplink Shared Channel (PUSCH). The ACK and NACK information is collectively referred to as HARQ-ACK information.
The network device schedules the PDSCH of the terminal device through the PDCCH, which includes information of which symbols of which time Slot (Slot) the PDSCH is located in. The PDCCH includes indication information indicating which Slot the HARQ-ACK corresponding to the PDSCH is fed back to.
In the prior art, for one terminal device, only one PUCCH containing HARQ-ACK information is fed back within 1 Slot. That is, when scheduling the PDSCH, the network device may indicate in which slot the HARQ-ACK corresponding to the PDSCH is located. In order to support the highest 1E-6 reliability of NR system Rel.16 version factory automation, transportation, power distribution, AR/VR and the like and the URLLC service requirement of 0.5 to 1ms, two or more PUCCHs containing HARQ-ACK information need to be fed back in 1 Slot.
In the prior art of NR systems, there are two formats for the PDCCH for scheduling PDSCH: DCI format1_ 0 and DCIformat1_ 1. HARQ-ACK corresponding to a PDSCH sent in the Slot # n is fed back in the Slot # n + k, and the value of k is determined by 'PDSCH-to-HARQ-timing-indicator' in DCI or by 'dl-DataToUL-ACK' of a high-layer signaling, which is specifically as follows:
for DCI format1_ 0 scheduled PDSCH or activated SPS PDSCH, the DCI field includes "PDSCH-to-HARQ-timing-indicator" for indicating the value of k, which corresponds to 1 of {1,2,3,4,5,6,7,8 }.
For the PDSCH scheduled by DCI format1_1 or the activated SPS PDSCH, if the higher layer signaling "dl-DataToUL-ACK" configures multiple values, a "PDSCH-to-HARQ-timing-indicator" field is included in DCI format1_1, and indicates that the value of k is one of the multiple configured values of "dl-DataToUL-ACK"; if only one value is configured for the higher layer signaling "dl-DataToUL-ACK", the "PDSCH-to-HARQ-timing-indicator" field is not included in the DCI format1_1, and the value of k is the configured value for "dl-DataToUL-ACK".
In order to support the feedback of two or more PUCCHs containing HARQ-ACK information in 1 Slot, the network device needs to indicate which Slot the HARQ-ACK corresponding to the PDSCH is fed back in, and also indicate which symbols in the Slot are fed back. Therefore, the signaling burden of the PDCCH transmitted by the network device will be large.
Disclosure of Invention
In view of this, the present application provides a method for determining timing of HARQ-ACK and a network terminal, which can solve the problems of heavy signaling load and low efficiency when a network device sends a timing difference between HARQ-ACK and a PDSCH.
In order to solve the technical problem, the technical scheme of the application is realized as follows:
a timing determination method for hybrid automatic repeat request acknowledgement (HARQ-ACK) information is applied to terminal equipment, and comprises the following steps:
receiving a Physical Downlink Control Channel (PDCCH) sent by network equipment, and determining an alternative value set of timing difference between a PDSCH and HARQ-ACK according to a first field of the PDCCH;
determining the value of the timing difference between the PDSCH and the HARQ-ACK in the determined alternative value set of the timing difference between the PDSCH and the HARQ-ACK;
and sending the HARQ-ACK information aiming at the PDSCH at the time position corresponding to the determined value.
A timing determination method for hybrid automatic repeat request acknowledgement (HARQ-ACK) information is applied to network equipment, and comprises the following steps:
transmitting a PDCCH to a terminal device, wherein a first field of the PDCCH is used for indicating time domain resource allocation of a PDSCH and an alternative value set used for a timing difference between the PDSCH and HARQ-ACK;
and receiving HARQ-ACK information for the PDSCH at the time position of the HARQ-ACK indicated by the PDCCH.
A terminal device, the terminal device comprising: the device comprises a receiving unit, a first determining unit, a second determining unit and a sending unit;
the receiving unit is configured to receive a physical downlink control channel PDCCH sent by a network device;
the first determining unit is configured to determine, according to the first field of the PDCCH received by the receiving unit, an alternative value set of a timing difference between the PDSCH and the HARQ-ACK;
the second determining unit is configured to determine, in the determined candidate value set of the timing difference between the PDSCH and the HARQ-ACK, a value of the timing difference between the PDSCH and the HARQ-ACK;
and the sending unit is configured to send HARQ-ACK information for the PDSCH at a time position corresponding to the value determined by the second determining unit.
A network device, the network device comprising:
the sending unit is configured to send a PDCCH to the terminal device, where a first field of the PDCCH is used to indicate time domain resource allocation of the PDSCH and an alternative value set used for a timing difference between the PDSCH and the HARQ-ACK;
and the receiving unit is used for receiving the HARQ-ACK information aiming at the PDSCH at the time position of the HARQ-ACK indicated by the PDCCH sent by the sending unit.
A timing determination system of hybrid automatic repeat request response information comprises the terminal device and the network device.
According to the technical scheme, the alternative value of the timing difference between the PDSCH and the HARQ-ACK is determined according to the symbol position occupied by the PDSCH in 1 time slot and the indicated value of the length, the timing difference between the PDSCH and the HARQ-ACK is determined to be one of the alternative values according to the PDSCH-to-HARQ-timing-indicator in the PDCCH, and the problems that the signaling load of the timing difference between the HARQ-ACK and the PDSCH sent by network equipment is too heavy and the efficiency is low can be solved.
Drawings
Fig. 1 is a schematic diagram of a timing determination process for implementing hybrid automatic repeat request response information on a terminal device side in an embodiment of the present application;
fig. 2 is a schematic diagram illustrating a timing determination process for implementing hybrid automatic repeat request response information at a network device side in an embodiment of the present application;
FIG. 3 is a schematic diagram illustrating a resource allocation method according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a terminal device applied to the above-described technology in the embodiment of the present application;
fig. 5 is a schematic structural diagram of a network device applied to the above-described technology in the embodiment of the present application;
fig. 6 is a schematic diagram of a system applied to the above technology in the embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly apparent, the technical solutions of the present invention are described in detail below with reference to the accompanying drawings and examples.
The embodiment of the application provides a timing determination method of hybrid automatic repeat request response information, which determines an alternative value of a timing difference between a PDSCH and an HARQ-ACK according to a symbol position occupied by the PDSCH in 1 time slot and an indicated value of a length, and determines the timing difference between the PDSCH and the HARQ-ACK as one of the alternative values according to a PDSCH-to-HARQ-timing-indicator in a PDCCH, so that the problems of over-heavy signaling load and low efficiency of the timing difference between the HARQ-ACK and the PDSCH sent by network equipment can be solved.
The following describes in detail a timing determination process for implementing harq response information in an embodiment of the present application with reference to the accompanying drawings.
Referring to fig. 1, fig. 1 is a schematic diagram of a timing determination process for implementing hybrid automatic repeat request response information on a terminal device side in this embodiment. The method comprises the following specific steps:
step 101, a terminal device receives a PDCCH sent by a network device, and determines a set of candidate values of timing difference between a PDSCH and a HARQ-ACK according to a first field of the PDCCH.
And the terminal equipment receives the PDCCH sent by the network equipment, and determines the alternative value set of the timing difference between the PDSCH and the HARQ-ACK according to the first field of the PDCCH when receiving the PDCCH signal sent by the PDCCH.
The following two three ways exist for the terminal device to determine the candidate value set of the timing difference between the PDSCH and the HARQ-ACK according to the first field of the PDCCH, respectively:
one way of correspondence of the first category is:
when receiving a Physical Downlink Control Channel (PDCCH) sent by network equipment, determining time domain resource allocation of the PDSCH according to the first field of the PDCCH; wherein the first field is used for indicating a row index in a target time domain resource allocation table;
determining a row index in a target time domain resource allocation table corresponding to the PDSCH according to the first field of the PDCCH; the kth row of the target time domain resource allocation table comprises time domain resource allocation of a PDSCH and a kth alternative value set of timing difference between the PDSCH and HARQ-ACK, K is more than or equal to 1 and less than or equal to K, and K is the row number of the target time domain resource allocation table.
And determining the setting of the kth alternative value set in the time domain resource allocation table according to at least one of the symbol number and the position occupied by the time domain allocation in the kth row.
That is to say, in this implementation, the row index in the target time domain resource allocation table is determined according to the first field, that is, the corresponding set of candidate values is determined.
A specific implementation of this implementation is described in example one below.
First implementation in the second class:
the first field of the PDCCH is used for the terminal equipment to determine a target time domain resource allocation table corresponding to time domain resource allocation of the PDSCH, wherein the target time domain resource allocation table belongs to a time domain resource allocation table group, the time domain resource allocation table group is composed of Q time domain resource allocation tables, the qth time domain resource allocation table in the time domain resource allocation table group corresponds to the jth candidate value set of the timing difference between the PDSCH and the HARQ-ACK, and Q is more than or equal to 1 and less than or equal to Q.
The implementation method configures the corresponding relation between the time domain resource allocation table and the alternative value set in advance, determines the target resource allocation table, and also determines the target resource allocation table.
Second implementation in the second class:
a first field of the PDCCH indicates a sequence number corresponding to the alternative value set; and distributing a globally unique serial number for each alternative value set, wherein each alternative value set is different.
In the implementation mode, some alternative value sets are configured in advance, a sequence number is distributed to each alternative value set, the first field directly indicates the sequence number, and the indicated sequence number is used for directly searching the alternative value sets.
Specific implementations of both implementations in the second class are described in example two below.
No matter which way mentioned above realizes the determination of the alternative value set, the setting rules and ways of the elements of the alternative value set are consistent, and the following are specific:
if any alternative value set comprises J elements, the J elements are used for indicating the time difference between the ending symbols of the time slots where the HARQ-ACK and the PDSCH are located;
or the like, or, alternatively,
the J elements are used for indicating the time difference between the ending symbols of the sub-time slots where the HARQ-ACK and the PDSCH are located;
or, the J elements are used to indicate a time difference between end symbols of the HARQ-ACK and the PDSCH;
wherein, the time difference is one or any combination of the following: the number of time slots, the number of sub-time slots and the number of symbols.
And 102, the terminal equipment determines the value of the timing difference between the PDSCH and the HARQ-ACK in the determined candidate value set of the timing difference between the PDSCH and the HARQ-ACK.
A second field of the PDCCH is used for indicating an index of a value of the timing difference between the PDSCH and the HARQ-ACK in an alternative value set of the timing difference between the PDSCH and the HARQ-ACK;
and determining the value of the timing difference between the PDSCH and the HARQ-ACK in the determined alternative value set of the timing difference between the PDSCH and the HARQ-ACK according to the second field of the PDCCH.
In a specific implementation, the second field directly indicates an index number.
And 103, the terminal equipment sends the HARQ-ACK information aiming at the PDSCH at the time position corresponding to the determined value.
Referring to fig. 2, fig. 2 is a schematic diagram of a timing determination process for a network device side to implement hybrid automatic repeat request response information in this embodiment. The method comprises the following specific steps:
step 201, the network device sends a PDCCH to the terminal device, wherein a first field of the PDCCH is used for indicating time domain resource allocation of the PDSCH and a set of candidate values for timing difference between the PDSCH and the HARQ-ACK.
Step 202, the network equipment receives HARQ-ACK information aiming at the PDSCH at the time position of the HARQ-ACK indicated by the PDCCH.
The PDCCH also carries a second field, and the second field of the PDCCH is used for indicating an index of a value of the timing difference between the PDSCH and the HARQ-ACK in an alternative value set of the timing difference between the PDSCH and the HARQ-ACK, so that the terminal equipment determines a time position corresponding to the HARQ-ACK information for the PDSCH in the alternative value set.
The following is described by two examples, respectively:
example one
First, network equipment sends a PDCCH.
The PDCCH is used for scheduling PDSCH, wherein a first field of the PDCCH is used for indicating a time domain resource allocation of PDSCH and a set of alternative values for timing difference between PDSCH and HARQ-ACK.
And sending an index of a value used for indicating the timing difference between the PDSCH and the HARQ-ACK in the alternative value set in a second field of the PDCCH.
In the embodiment of the present application, if it can be predicted that the number of elements in the candidate value set to be determined by the terminal device is 1, the second field may not be carried, or the second field is empty, or the index number of the field is 1.
And secondly, the terminal equipment receives the PDCCH sent by the network equipment. When receiving a PDCCH sent by a network device, a terminal device determines a time-frequency resource of a PDSCH according to a first field of the PDCCH, which is specifically implemented as follows:
the first field of the PDCCH includes 4 bits of information, and different values of the 4 bits of information correspond to different rows in the target time domain resource allocation table.
The terminal device may support multiple time domain resource allocation tables, and the tables corresponding to the PDSCH are different according to different types of the PDSCH.
It should be noted that the time domain resource allocation table is an embodiment describing the PDSCH in time domain allocation result. The time domain allocation result of the PDSCH may also be embodied in a similar set, array, or the like. Each row of the time domain resource allocation table corresponds to a time domain allocation result of the PDSCH. Of course, each column of the time domain resource allocation table may also correspond to a time domain allocation result of a PDSCH. Or a plurality of arrays can be used to express the time domain allocation results of different PDSCHs, and each array corresponds to one time domain allocation result of a PDSCH. The time domain resource allocation table is used to describe the time domain allocation result of the PDSCH, and does not limit the embodiment of the time domain allocation result of the PDSCH. The PDSCH allocation in the time domain may be represented by other index values based on the same design concept.
The terminal equipment firstly determines and acquires a target time domain resource allocation table corresponding to a PDCCH for scheduling the PDSCH, namely determines and acquires the target time domain resource allocation table, wherein the table corresponds to the PDCCH for scheduling the PDSCH. The process of determining the target time domain resource allocation table is implemented as in the prior art, and the implementation manner is not limited in the application.
Each row of the target time domain resource allocation table includes information of PDSCH starting and length indication SLIV (or directly indicating starting symbol S and length L). In addition, each row of the target time domain resource allocation table may further include at least one of a "slot offset K0" and a PDSCH mapping type.
Assuming that the target time domain resource allocation table includes maxNrofDL-Allocations rows, the starting position S and length L of PDSCH corresponding to each row satisfy the following conditions, which are specifically shown in table 1.
Figure BDA0001851738420000091
TABLE 1
The foregoing is merely an example, and specific implementations are not limited to the implementations given above.
And thirdly, the terminal equipment determines an alternative value set of the timing difference between the PDSCH and the HARQ-ACK according to the first field of the PDCCH.
And the terminal equipment determines the time domain resource allocation of the PDSCH in the second step according to the first field of the PDCCH, namely the PDSCH occupied symbol positions in 1 time slot and corresponding to the indicated values of the length of the PDSCH have various starting positions S and lengths L.
When S is 0, L may be any one of 3, …, and 14. According to the prior art, the terminal equipment determines the value of k according to 'PDSCH-to-HARQ-timing-indicator' or 'dl-DataToUL-ACK' in DCI. The method for the terminal equipment to determine the Slot # n + k of the HARQ-ACK corresponding to the PDSCH is the same regardless of the starting position S and the length L of the symbol occupied by the PDSCH in the Slot # n, and the value range of k is the same.
The starting position S and the length L of the PDSCH in the Slot # n are various and are often used to support different types of downlink data traffic. For example, for the eBB service type in the NR system, the data packet size is large, and the reliability requirement is 1E-1. For the URLLC traffic type in NR systems, it is characterized by relatively small packet size, but reliability requirements are up to 1E-6 at maximum, and delay requirements are in the range of 0.5 to 1 ms. For the eMBB traffic type, the length L of its PDSCH is longer. Due to its lower time delay requirement, HARQ-ACK can be fed back after a longer time, e.g. HARQ-ACK for PDSCH within Slot # n is fed back at Slot # n + 16. But for URLLC traffic types, the length L of its PDSCH is small. And because the time delay requirement is high, if the HARQ-ACK of the PDSCH in Slot # n is fed back at Slot # n +16, the time delay of the feedback information may already exceed the time delay required by URLLC. Therefore, for PDSCH of URLLC traffic type, HARQ-ACK for PDSCH is unlikely to be fed back a long time after PDSCH.
In the prior art, no matter how the starting position S and the length L of a symbol occupied by a PDSCH in Slot # n, the terminal device determines that the Slot # n + k of the HARQ-ACK corresponding to the PDSCH is the same, and the value range of k is also the same. If the terminal device knows that the traffic type corresponding to the PDSCH is URLLC, the timing difference between HARQ-ACK and PDSCH should be within a short period of time after PDSCH. Moreover, in order to support the low-delay requirement of the URLLC service, it is necessary to support that two or more PUCCHs containing HARQ-ACK information are fed back within 1 Slot, and the time resource for the terminal device to send HARQ-ACK should be accurately indicated to which symbols of which Slot. Therefore, for a terminal device simultaneously supporting different service types, the signaling load of the existing network device for sending the timing difference between the HARQ-ACK and the PDSCH is too heavy and the efficiency is low.
In the embodiment of the application, the terminal device may determine, according to the first field of the PDCCH, the candidate value set of the timing difference between the PDSCH and the HARQ-ACK, in addition to the time domain resource allocation of the PDSCH.
In a target time domain resource allocation table, a corresponding alternative value set process is set according to the SLIV, specifically:
each row includes a set of alternative values for timing between PDSCH and HARQ-ACK in addition to the PDSCH start and length indication SLIV (or directly the start symbol S and length L). For example, the first row of the target time domain resource allocation table corresponds to the first value of the symbol position occupied by the PDSCH and the indicated value of the length, and the alternative value set corresponding to the timing difference between the PDSCH and the HARQ-ACK is { V } -V11,V12,……,V1N}; the second row of the target time domain resource allocation table corresponds to the second value of the symbol position occupied by the PDSCH and the indicated value of the length, and the alternative value set corresponding to the timing difference between the PDSCH and the HARQ-ACK is { V }21,V22,……,V2N}; … …, respectively; the K-th row of the target time domain resource allocation table corresponds to the K-th value of the symbol position occupied by the PDSCH and the indicated value of the length, and the alternative value set corresponding to the timing difference between the PDSCH and the HARQ-ACK is { V } -VK1,VK2,……,VKN}. The target time domain resource allocation table comprises K rows in common, wherein the alternative value set of the timing difference between the PDSCH and the HARQ-ACK of the K (K is less than or equal to K) th row comprises JkAnd (4) each element. The J iskThe element is used for indicating the time difference between the ending symbols of the time slot in which the HARQ-ACK and the PDSCH are positioned, and the time difference can be represented by at least one of the number of the time slot, the sub-time slot and the symbols; or the JkThe element is used for indicating the time difference between the ending symbols of the sub-slots where the HARQ-ACK and the PDSCH are located, and the time difference can be represented by at least one of the number of the time slots, the sub-slots and the symbols; or the JkOne element for indicating HARQ-ACK and PDSCH end-symbolWhat is the time difference between the numbers, which can be expressed in terms of at least one of the number of slots, subslots, symbols. The sub-slot here means that the symbols included in 1 slot are divided into several parts according to a preset mode, and each part is called a sub-slot. For example, 1 slot includes 14 symbols, the 14 symbols are sequentially divided into 6 groups according to the time sequence and according to 2,3, 2,3 symbols, and the time domain resource of each group is referred to as a sub-slot.
In the target time domain resource allocation table, each row includes a PDSCH starting and length indication, SLIV, (or directly a starting symbol, S, and length, L), and also includes a set of alternative values of timing between PDSCH and HARQ-ACK. When the time length L occupied by the PDSCH is large, the PDSCH mostly corresponds to the eMBB service type, and the alternative value set of the timing difference between the PDSCH and its HARQ-ACK may be preset to a value with a large time length. E.g., {5 slots, 6 slots, 7 slots, 8 slots, 9 slots, 10 slots, 11 slots, 12 slots }. When the time length L occupied by the PDSCH is small, the PDSCH mostly corresponds to the URLLC service type, and the alternative value set of the timing difference between the PDSCH and its HARQ-ACK may be preset to a value with a small time length. E.g., {1 slot +4 sub-slots, 1 slot +6 sub-slots, 2 slots +1 sub-slot, 2 slots +3 sub-slots, 2 slots +5 sub-slots, 3 slots +1 sub-slot, 3 slots +3 sub-slots, 3 slots +5 sub-slots }.
As described in section 5 of 3GPP TS 38214.Vf30 and 3GPP TS 38331.Vf30, the configuration parameters PDSCH-timedomainresource allocation of each row in the target time domain resource allocation table includes "k 0", "mappingType", and "startSymbolAndLength" parameters, as follows:
Figure BDA0001851738420000111
Figure BDA0001851738420000121
the PDSCH-time domain resource allocation parameter of each row in the target time domain resource allocation table provided in the embodiment of the present application includes a parameter "dl-datatoll-ACK" in addition to the parameters "k 0", "mappingType", and "startSymbolAndLength", where the parameter is used to identify an alternative value set of the timing difference between the PDSCH corresponding to the row scheduling and the HARQ-ACK thereof.
Fourthly, the terminal equipment determines the value of the timing difference between the PDSCH and the HARQ-ACK in the determined alternative value set of the timing difference between the PDSCH and the HARQ-ACK; and transmitting HARQ-ACK information aiming at the PDSCH at the time position corresponding to the determined value. And determining the value of the timing difference between the PDSCH and the HARQ-ACK, and sending the HARQ-ACK information aiming at the PDSCH at the time position of the HARQ-ACK.
And the terminal equipment determines the alternative value set of the timing difference between the PDSCH and the HARQ-ACK according to the first field of the PDCCH. And if the number of the elements in the alternative value set is more than 1, the terminal equipment determines the value of the timing difference between the PDSCH and the HARQ-ACK according to the second field of the PDCCH.
Such as: the set of alternative values for the timing difference between PDSCH and HARQ-ACK is Vk1,Vk2,……,VkNN-8. The second field in the PDCCH comprises 3 bits for indicating which of the 8 elements the timing difference value between PDSCH and HARQ-ACK is. And if the number of the elements in the alternative value set is equal to 1, the terminal equipment determines that the elements in the alternative value set of the timing difference between the PDSCH and the HARQ-ACK according to the first field are the timing difference between the PDSCH and the HARQ-ACK.
For example, referring to table 2, table 2 is the content included in the time domain resource allocation table in the embodiment of the present application.
Figure BDA0001851738420000131
TABLE 2
The target time domain resource allocation table of table 2 includes rows N1, N1+1, and N1+2 (other rows are omitted, not to be exhaustive). Where SLIV of PDSCH on row N1 is 26, starting symbol S of corresponding PDSCH is 1, and L is 14; SLIV of PDSCH in N1+1 th row is 92, starting symbol S of corresponding PDSCH is 8, and L is 7; the SLIV of the PDSCH of (2) is 27, the starting symbol S of the corresponding PDSCH is 13, and L is 2. The alternative set of timing between PDSCH and HARQ-ACK preset in row N1 is {4, 5,6, 7} slots after the last symbol of the slot in which the PDSCH is located; the set of alternative values for timing between PDSCH and HARQ-ACK preset in row N1+1 is {4, 5,6, 7} sub-slots after the last symbol of the slot in which the PDSCH is located; the set of alternative values for the timing between PDSCH and HARQ-ACK that is preset in line N1+2 is {4 symbol, 5 symbol, 4 sub-slot, 5 sub-slot } after the last symbol of the slot in which the PDSCH is located.
And fifthly, the network equipment receives the HARQ-ACK information aiming at the PDSCH at the time position of the HARQ-ACK.
A specific resource scheduling method is given below with reference to the accompanying drawings:
referring to fig. 3, fig. 3 is a schematic diagram of a resource allocation method in the embodiment of the present application. In fig. 3, the grid entry corresponds to the PDSCH, and the horizontal line box corresponds to the HARQ-ACK for the PDSCH.
In fig. 3, the network device may schedule the allocation manner in row N1 in the target time domain resource allocation table to the eMBB service type of the terminal device, and its corresponding HARQ-ACK feedback alternative is in a longer time range after the PDSCH. And scheduling the allocation mode of the N1+2 th row in the target time domain resource allocation table to the URLLC service type of the terminal equipment, wherein the corresponding HARQ-ACK feedback alternative is in a short time range after the PDSCH. The information of the second field in the PDCCH is different in the indication range of different rows in the target time domain resource allocation table, and the implementation mode solves the problems of overweight signaling load and lower efficiency when the network equipment sends the timing difference between the HARQ-ACK and the PDSCH.
Example two
First, network equipment sends a PDCCH.
The PDCCH is used for scheduling PDSCH, wherein a first field of the PDCCH is used for indicating a time domain resource allocation of PDSCH and a set of alternative values for timing difference between PDSCH and HARQ-ACK.
And sending an index of a value used for indicating the timing difference between the PDSCH and the HARQ-ACK in the alternative value set in a second field of the PDCCH.
In the embodiment of the present application, if it can be predicted that the number of elements in the candidate value set to be determined by the terminal is 1, the second field is not carried, or the second field is empty, or the index number of the field is 1.
And secondly, the terminal equipment receives the PDCCH sent by the network equipment.
When receiving a PDCCH sent by network equipment, terminal equipment determines a set of timing alternative values between DSCH and HARQ-ACK according to a first field of the PDCCH.
The terminal equipment determines a timing alternative value set between the PDSCH and the HARQ-ACK according to the first field of the PDCCH, and can adopt the following two modes:
the first mode is as follows:
and presetting an alternative value set corresponding to the time domain resource allocation table. As a first set of first table pairs; the second table corresponds to the second set; … …, respectively; the mth table corresponds to the mth set, wherein at least two of the first set, the second set, … …, and the mth set are not equal.
The terminal device determines, according to the first field of the PDCCH, a target time domain resource allocation table corresponding to time domain resource allocation of the PDSCH, and further obtains a candidate value set corresponding to the target time domain resource allocation table, which includes the following specific examples:
when a target time domain resource allocation table corresponding to the PDSCH time domain resource allocation is a first table, the alternative value set of the timing difference between the PDSCH and the HARQ-ACK is a first set; when the target time domain resource allocation table corresponding to the PDSCH time domain resource allocation is a second table, the alternative value set of the timing difference between the PDSCH and the HARQ-ACK is a second set; … …, respectively; and when the target time domain resource allocation table corresponding to the PDSCH time domain resource allocation is the Mth table, the alternative value set of the timing difference between the PDSCH and the HARQ-ACK is the Mth set.
By adopting the mode, specific services can be realized as follows: when the PDSCH is an eMBB service, the target time domain resource allocation table corresponding to its time domain resource allocation is a first table, and when the PDSCH is a URLLC service, the target time domain resource allocation table corresponding to its time domain resource allocation is a second table. The first set corresponding to the first table is not equal to the second set corresponding to the second table.
In this embodiment, the manner of the target time domain resource allocation table corresponding to the time domain resource allocation by the terminal device according to the PDSCH is not limited. For example, the terminal device may determine, according to a preset field in the PDCCH, which of the first table, the second table, and the … … mth table is the target time domain resource allocation table, and may also determine, according to a value of an RNTI in the PDCCH and the CRC check bit scrambling process, which of the first table, the second table, and the … … mth table is the target time domain resource allocation table, and so on.
The second mode is as follows:
and presetting values corresponding to the candidate value set, wherein if the value corresponding to the first set is a first value … …, the value corresponding to the Nth set is an Nth value. Then, the M sets are different.
And the terminal equipment directly determines the alternative value set of the timing difference between the DSCH and the HARQ-ACK according to the first field of the PDCCH.
If the value of the first field is the first value, the alternative value set of the timing difference between the PDSCH and the HARQ-ACK is the first set; when the preset field is a second value, the alternative value set of the timing difference between the PDSCH and the HARQ-ACK is a second set; … …, respectively; when the preset field is the nth value, the set of alternative values for the timing difference between the PDSCH and the HARQ-ACK is the nth set.
By adopting the mode, when the PDSCH is an eMBB service, the preset field in the PDCCH is a first value; when the PDSCH is the service of the eMBB, the preset field in the PDCCH is the second value. The first set and the second set corresponding to the first value and the second value respectively are not equal. Namely, the ranges and the granularities of the HARQ-ACK feedback time corresponding to the PDSCH of the eMBB service and the PDSCH of the URLLC service are different.
The elements in the alternative value set are configured as described in the first embodiment, and are not described in detail here.
Thirdly, the terminal equipment determines the value of the timing difference between the PDSCH and the HARQ-ACK in the determined alternative value set of the timing difference between the PDSCH and the HARQ-ACK; and transmitting HARQ-ACK information aiming at the PDSCH at the time position corresponding to the determined value. And determining the value of the timing difference between the PDSCH and the HARQ-ACK, and sending the HARQ-ACK information aiming at the PDSCH at the time position of the HARQ-ACK.
And the terminal equipment determines the alternative value set of the timing difference between the PDSCH and the HARQ-ACK according to the first field of the PDCCH. And if the number of the alternative value sets is more than 1, the terminal equipment determines the value of the timing difference between the PDSCH and the HARQ-ACK according to the second field of the PDCCH. An alternative set of values, e.g. timing differences between PDSCH and HARQ-ACK, is Vk1,Vk2,……,VkNN-8. The second field in the PDCCH comprises 3 bits for indicating which of the 8 sets of candidate values the timing difference value between PDSCH and HARQ-ACK is. And if the number of the alternative value sets is equal to 1, the terminal equipment determines the alternative value set of the timing difference between the PDSCH and the HARQ-ACK according to the first field as the timing difference between the PDSCH and the HARQ-ACK.
And fourthly, the network equipment receives the HARQ-ACK information aiming at the PDSCH at the time position of the HARQ-ACK.
By the embodiment, the ranges and the granularities of the HARQ-ACK feedback time corresponding to the PDSCH of the eMBB service and the PDSCH of the URLLC service are different, so that the problems of overweight signaling load and lower efficiency of the network equipment in the prior art for sending the timing difference between the HARQ-ACK and the PDSCH can be solved.
In addition, based on the same inventive concept, the embodiment of the application also provides the terminal equipment. Referring to fig. 4, fig. 4 is a schematic structural diagram of a terminal device applied to the above technology in the embodiment of the present application. The terminal device includes: a receiving unit 401, a first determining unit 402, a second determining unit 403, and a transmitting unit 404;
a receiving unit 401, configured to receive a physical downlink control channel PDCCH sent by a network device;
a first determining unit 402, configured to determine, according to the first field of the PDCCH received by the receiving unit 401, an alternative value set of the timing difference between the PDSCH and the HARQ-ACK;
a second determining unit 403, configured to determine, in the determined candidate value set of the timing difference between the PDSCH and the HARQ-ACK, a value of the timing difference between the PDSCH and the HARQ-ACK;
a sending unit 404, configured to send HARQ-ACK information for the PDSCH at a time position corresponding to the value determined by the second determining unit 403.
Preferably, the first and second liquid crystal films are made of a polymer,
a first determining unit, further configured to determine, when the receiving unit receives the PDCCH, time domain resource allocation of the PDSCH according to the first field of the PDCCH; wherein the first field is used for indicating a row index in a target time domain resource allocation table; determining a row index in a target time domain resource allocation table corresponding to the PDSCH according to the first field of the PDCCH; the kth row of the target time domain resource allocation table comprises time domain resource allocation of a PDSCH and a kth alternative value set of timing difference between the PDSCH and HARQ-ACK, K is more than or equal to 1 and less than or equal to K, and K is the row number of the target time domain resource allocation table.
Preferably, the first and second liquid crystal films are made of a polymer,
and setting the kth alternative value set in the time domain resource allocation table according to at least one of symbol number and position occupied by time domain allocation in the kth row.
Preferably, the first and second liquid crystal films are made of a polymer,
the first field of the PDCCH is used for the terminal equipment to determine a target time domain resource allocation table corresponding to time domain resource allocation of the PDSCH, wherein the target time domain resource allocation table belongs to a time domain resource allocation table group, the time domain resource allocation table group is composed of Q time domain resource allocation tables, the qth time domain resource allocation table in the time domain resource allocation table group corresponds to the jth candidate value set of the timing difference between the PDSCH and the HARQ-ACK, and Q is more than or equal to 1 and less than or equal to Q.
Preferably, the first and second liquid crystal films are made of a polymer,
a first field of the PDCCH indicates a sequence number corresponding to the alternative value set; and distributing a globally unique serial number for each alternative value set, wherein each alternative value set is different.
Preferably, the first and second liquid crystal films are made of a polymer,
if any alternative value set comprises J elements, the J elements are used for indicating the time difference between the ending symbols of the time slots where the HARQ-ACK and the PDSCH are located;
or the like, or, alternatively,
the J elements are used for indicating the time difference between the ending symbols of the sub-time slots where the HARQ-ACK and the PDSCH are located;
or, the J elements are used to indicate a time difference between end symbols of the HARQ-ACK and the PDSCH;
wherein, the time difference is one or any combination of the following: the number of time slots, the number of sub-time slots and the number of symbols.
Preferably, the first and second liquid crystal films are made of a polymer,
the second field of the PDCCH is used for indicating an index of the value of the timing difference between the PDSCH and the HARQ-ACK in the alternative value set of the timing difference between the PDSCH and the HARQ-ACK;
a second determining unit 403, configured to determine, according to the second field of the PDCCH, a value of the timing difference between the PDSCH and the HARQ-ACK in the determined candidate value set of the timing difference between the PDSCH and the HARQ-ACK.
Based on the same inventive concept, the embodiment of the application also provides network equipment. Referring to fig. 5, fig. 5 is a schematic structural diagram of a network device applied to the above-described technology in the embodiment of the present application. The network device includes: a transmitting unit 501 and a receiving unit 502;
the sending unit is configured to send a PDCCH to the terminal device, where a first field of the PDCCH is used to indicate time domain resource allocation of the PDSCH and an alternative value set used for a timing difference between the PDSCH and the HARQ-ACK;
and the receiving unit is used for receiving the HARQ-ACK information aiming at the PDSCH at the time position of the HARQ-ACK indicated by the PDCCH sent by the sending unit.
The units of the above embodiments may be integrated into one body, or may be separately deployed; may be combined into one unit or further divided into a plurality of sub-units.
Based on the same inventive concept, the embodiment of the present application further provides a timing determination system for hybrid automatic repeat request response information. Referring to fig. 6, fig. 6 is a schematic diagram of a system applied to the above technology in the embodiment of the present application. The system comprises the terminal equipment and the network equipment.
To sum up, this application confirms PDSCH and HARQ-ACK timing difference's alternative value according to the occupied symbol position of PDSCH and the indicated value of length in 1 time slot in this application to confirm PDSCH and HARQ-ACK timing difference does according to "PDSCH-to-HARQ-timing-indicator" in the PDCCH one of the alternative value, can solve the signaling load overweight, the lower problem of efficiency that network equipment sent timing difference between HARQ-ACK and PDSCH.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (12)

1. A timing determination method for hybrid automatic repeat request acknowledgement information (HARQ-ACK) is applied to a terminal device, and is characterized in that the method comprises the following steps:
receiving a Physical Downlink Control Channel (PDCCH) sent by network equipment, and determining an alternative value set of timing difference between a Physical Downlink Shared Channel (PDSCH) and hybrid automatic repeat request-acknowledgement (HARQ-ACK) according to a first field of the PDCCH;
determining the value of the timing difference between the PDSCH and the HARQ-ACK in the determined alternative value set of the timing difference between the PDSCH and the HARQ-ACK;
and sending the HARQ-ACK information aiming at the PDSCH at the time position corresponding to the determined value.
2. The method according to claim 1, wherein when receiving a physical downlink control channel PDCCH sent by a network device, the method further comprises:
determining time domain resource allocation of the PDSCH according to the first field of the PDCCH; wherein the first field is used for indicating a row index in a target time domain resource allocation table;
determining a row index in a target time domain resource allocation table corresponding to the PDSCH according to the first field of the PDCCH; the kth row of the target time domain resource allocation table comprises time domain resource allocation of a PDSCH and a kth alternative value set of timing difference between the PDSCH and HARQ-ACK, K is more than or equal to 1 and less than or equal to K, and K is the row number of the target time domain resource allocation table.
3. The method of claim 2,
and setting the kth alternative value set in the time domain resource allocation table according to at least one of symbol number and position occupied by time domain allocation in the kth row.
4. The method of claim 1,
the first field of the PDCCH is used for the terminal equipment to determine a target time domain resource allocation table corresponding to time domain resource allocation of the PDSCH, wherein the target time domain resource allocation table belongs to a time domain resource allocation table group, the time domain resource allocation table group is composed of Q time domain resource allocation tables, the qth time domain resource allocation table in the time domain resource allocation table group corresponds to the jth candidate value set of the timing difference between the PDSCH and the HARQ-ACK, and Q is more than or equal to 1 and less than or equal to Q.
5. The method of claim 1,
a first field of the PDCCH indicates a sequence number corresponding to a set of alternative values; and distributing a globally unique serial number for each alternative value set, wherein each alternative value set is different.
6. The method according to any one of claims 1 to 5,
if any alternative value set comprises J elements, the J elements are used for indicating the time difference between the ending symbols of the time slots where the HARQ-ACK and the PDSCH are located;
or the like, or, alternatively,
the J elements are used for indicating the time difference between the ending symbols of the sub-time slots where the HARQ-ACK and the PDSCH are located;
or, the J elements are used to indicate a time difference between end symbols of the HARQ-ACK and the PDSCH;
wherein, the time difference is one or any combination of the following: the number of time slots, the number of sub-time slots and the number of symbols.
7. The method according to any one of claims 1 to 6,
the second field of the PDCCH is used for indicating an index of the value of the timing difference between the PDSCH and the HARQ-ACK in the alternative value set of the timing difference between the PDSCH and the HARQ-ACK;
and determining the value of the timing difference between the PDSCH and the HARQ-ACK in the determined alternative value set of the timing difference between the PDSCH and the HARQ-ACK according to the second field of the PDCCH.
8. A timing determination method for HARQ-ACK information of hybrid automatic repeat request acknowledgement (HARQ-ACK) is applied to network equipment, and is characterized by comprising the following steps:
sending a Physical Downlink Control Channel (PDCCH) to terminal equipment, wherein a first field of the PDCCH is used for indicating time domain resource allocation of a Physical Downlink Shared Channel (PDSCH) and an alternative value set used for a timing difference between the PDSCH and HARQ-ACK;
and receiving HARQ-ACK information for the PDSCH at the time position of the HARQ-ACK indicated by the PDCCH.
9. The method of claim 8, further comprising:
and the second field of the PDCCH is used for indicating an index of the value of the timing difference between the PDSCH and the HARQ-ACK in an alternative value set of the timing difference between the PDSCH and the HARQ-ACK, so that the terminal equipment determines the time position corresponding to the HARQ-ACK information for the PDSCH in the alternative value set.
10. A terminal device, characterized in that the terminal device comprises: the device comprises a receiving unit, a first determining unit, a second determining unit and a sending unit;
the receiving unit is configured to receive a physical downlink control channel PDCCH sent by a network device;
the first determining unit is configured to determine, according to the first field of the PDCCH received by the receiving unit, an alternative value set of a timing difference between a physical downlink shared channel PDSCH and a hybrid automatic repeat request acknowledgement HARQ-ACK;
the second determining unit is configured to determine, in the determined candidate value set of the timing difference between the PDSCH and the HARQ-ACK, a value of the timing difference between the PDSCH and the HARQ-ACK;
and the sending unit is configured to send HARQ-ACK information for the PDSCH at a time position corresponding to the value determined by the second determining unit.
11. A network device, characterized in that the network device comprises:
the sending unit is used for sending a Physical Downlink Control Channel (PDCCH) to the terminal equipment, wherein a first field of the PDCCH is used for indicating time domain resource allocation of a Physical Downlink Shared Channel (PDSCH) and an alternative value set used for a timing difference between the PDSCH and a hybrid automatic repeat request response (HARQ-ACK);
and the receiving unit is used for receiving the HARQ-ACK information aiming at the PDSCH at the time position of the HARQ-ACK indicated by the PDCCH sent by the sending unit.
12. A system for determining timing of harq response information, comprising the terminal device of claim 10 and the network device of claim 11.
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