CN111064550A - Hybrid automatic repeat request HARQ transmission control method and device - Google Patents

Hybrid automatic repeat request HARQ transmission control method and device Download PDF

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Publication number
CN111064550A
CN111064550A CN201811203159.8A CN201811203159A CN111064550A CN 111064550 A CN111064550 A CN 111064550A CN 201811203159 A CN201811203159 A CN 201811203159A CN 111064550 A CN111064550 A CN 111064550A
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identification number
offset value
time
retransmission
domain offset
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郑辰
冯绍鹏
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Potevio Information Technology Co Ltd
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Potevio Information Technology Co Ltd
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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
    • H04L1/1812—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
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/1893—Physical mapping arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/04—Error control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • 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

Abstract

The embodiment of the invention provides a hybrid automatic repeat request (HARQ) transmission control method and a device. The method comprises the following steps: acquiring initial transmission parameters of a terminal for initial data transmission, wherein the initial transmission parameters comprise a multiple access sequence identification number and a lead code identification number of the initial data transmission; determining a time-frequency parameter of HARQ retransmission of the terminal according to the multiple access sequence identification number and the lead code identification number; the time-frequency parameters at least comprise a time domain offset value and a frequency domain offset value; and carrying the time-frequency parameter in a retransmission parameter for indicating the terminal to perform HARQ retransmission and indicating the retransmission parameter to the terminal. The embodiment of the invention solves the problem that in the prior art, in a 5G communication system, a terminal transmits by using a grant free mode, and retransmission easily causes time-frequency resource and MA signature conflict.

Description

Hybrid automatic repeat request HARQ transmission control method and device
Technical Field
The embodiment of the invention relates to the technical field of mobile communication, in particular to a hybrid automatic repeat request (HARQ) transmission control method and device.
Background
With the continuous development of mobile internet technology and internet of things technology, a corresponding demand is put on the fifth generation mobile communication network (5G) technology. In the 5G technology, Mobile Communication scenes are currently divided according to existing requirements, including enhanced Mobile Broadband (eMBB), mass machine type Communication (mtc), Ultra-Reliable low latency Communication (URLLC), and other scenes.
In a 5G communication system, the requirements on the reliability and the time delay of wireless communication are higher, and in three scenes of eMBB, mMTC and URLLC, in order to improve the utilization rate of frequency spectrum and reduce the transmission time delay, a non-orthogonal multiple access technology is provided in uplink transmission.
Specifically, in the non-orthogonal multiple access technology, a terminal (UE) may be in a connected state (connected) or an idle state (idle); if the terminal uses a grant free mechanism, in a Hybrid Automatic Repeat reQuest (HARQ), an evolved node b (eNB) needs to know the next retransmission corresponding to the retransmission, and can perform soft bit combining before a correct Cyclic Redundancy Check (CRC) to improve decoding performance.
In the non-orthogonal multiple access transmission in the 5G communication system, the terminal in the connected state may use a grant based transmission mechanism (grant free) or a grant free transmission mechanism (grant base); however, the UE in the idle state can only use the grant free mechanism, that is, if the terminal uses the grant free mode for transmission, especially for the terminal in the idle state, the transmission can only be performed in the case of the grant free during the initial transmission and the retransmission. In this case, the retransmission easily causes a time-frequency resource and a Multiple Access sequence (MA signature) collision, and information transmitted by the terminal cannot be released even by combining.
Disclosure of Invention
The embodiment of the invention provides a hybrid automatic repeat request (HARQ) transmission control method and device, which are used for solving the problems that in the prior art, in a 5G communication system, a terminal transmits by using a grant free mode, and time-frequency resources and MA signature conflicts are easily caused by retransmission.
In one aspect, an embodiment of the present invention provides a method for controlling HARQ transmission, which is applied to a network device, and the method includes: acquiring initial transmission parameters of a terminal for initial data transmission, wherein the initial transmission parameters comprise a multiple access sequence identification number and a lead code identification number of the initial data transmission;
determining a time-frequency parameter of HARQ retransmission of the terminal according to the multiple access sequence identification number and the lead code identification number; the time-frequency parameters at least comprise a time domain offset value and a frequency domain offset value;
and carrying the time-frequency parameter in a retransmission parameter for indicating the terminal to perform HARQ retransmission and indicating the retransmission parameter to the terminal.
In one aspect, an embodiment of the present invention provides a method for controlling HARQ transmission, which is applied to a terminal, and includes:
sending initial transmission parameters for primary data transmission to network side equipment, wherein the initial transmission parameters comprise a multiple access sequence identification number and a lead code identification number of the primary data transmission;
receiving retransmission parameters of HARQ retransmission indicated by the network side equipment, wherein the retransmission parameters carry time-frequency parameters of the HARQ retransmission determined by the network side equipment according to the multiple access sequence identification number and the lead code identification number; the time-frequency parameters at least comprise a time domain offset value and a frequency domain offset value.
On the other hand, an embodiment of the present invention further provides a hybrid automatic repeat request HARQ transmission control apparatus, which is applied to a network side device, and the apparatus includes:
the system comprises an acquisition module, a transmission module and a transmission module, wherein the acquisition module is used for acquiring initial transmission parameters of a terminal for initial data transmission, and the initial transmission parameters comprise a multiple access sequence identification number and a lead code identification number of the initial data transmission;
a determining module, configured to determine, according to the multiple access sequence identification number and the preamble identification number, a time-frequency parameter for HARQ retransmission performed by the terminal; the time-frequency parameters at least comprise a time domain offset value and a frequency domain offset value;
and the indicating module is used for carrying the time-frequency parameter in a retransmission parameter for indicating the terminal to carry out HARQ retransmission and indicating the time-frequency parameter to the terminal.
On the other hand, an embodiment of the present invention further provides a hybrid automatic repeat request HARQ transmission control apparatus, which is applied to a terminal, and the apparatus includes:
a sending module, configured to send, to a network side device, an initial transmission parameter for performing initial data transmission, where the initial transmission parameter includes a multiple access sequence identification number and a preamble identification number of the initial data transmission;
a receiving module, configured to receive a retransmission parameter of an HARQ retransmission indicated by the network side device, where the retransmission parameter carries a time-frequency parameter of the HARQ retransmission determined by the network side device according to the multiple access sequence identification number and the preamble identification number; the time-frequency parameters at least comprise a time domain offset value and a frequency domain offset value.
On the other hand, an embodiment of the present invention further provides an electronic device, which includes a memory, a processor, a bus, and a computer program stored in the memory and executable on the processor, where the processor implements the steps in the hybrid automatic repeat request HARQ transmission control method when executing the program.
In still another aspect, an embodiment of the present invention further provides a non-transitory computer-readable storage medium, on which a computer program is stored, where the program, when executed by a processor, implements the steps in the above-mentioned hybrid automatic repeat request HARQ transmission control method.
In the method for controlling hybrid automatic repeat request (HARQ) transmission provided by the embodiment of the invention, the time-frequency parameter of HARQ retransmission performed by a terminal is determined according to the multiple access sequence identification number and the lead code identification number by acquiring the initial transmission parameter of the initial data transmission performed by the terminal; the time-frequency parameters at least comprise a time domain offset value and a frequency domain offset value; the time-frequency parameters are carried in retransmission parameters used for indicating the terminal to perform HARQ retransmission, and the retransmission parameters are indicated to the terminal, so that when the terminal performs HARQ retransmission, reselection is performed according to the time-frequency parameters, and a corresponding time domain offset value and a corresponding frequency domain offset value are selected, thereby effectively avoiding causing time-frequency resource and MA signature conflict, reducing the probability of conflict, and improving the decoding performance.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a flowchart illustrating a hybrid automatic repeat request HARQ transmission control method according to an embodiment of the present invention;
fig. 2 is a second flowchart illustrating a HARQ transmission control method according to an embodiment of the present invention;
fig. 3 is a block diagram of a hybrid automatic repeat request HARQ transmission control apparatus according to an embodiment of the present invention;
fig. 4 is a second block diagram of a hybrid automatic repeat request HARQ transmission control apparatus according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments. In the following description, specific details such as specific configurations and components are provided only to help the full understanding of the embodiments of the present invention. Thus, it will be apparent to those skilled in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the invention. In addition, descriptions of well-known functions and constructions are omitted for clarity and conciseness.
It should be appreciated that reference throughout this specification to "an embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, the appearances of the phrase "in an embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
In various embodiments of the present invention, it should be understood that the sequence numbers of the following processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
In the embodiments provided herein, it should be understood that "B corresponding to a" means that B is associated with a from which B can be determined. It should also be understood that determining B from a does not mean determining B from a alone, but may be determined from a and/or other information.
Fig. 1 is a flowchart illustrating a method for controlling HARQ transmission according to an embodiment of the present invention.
As shown in fig. 1, a method for controlling HARQ transmission according to an embodiment of the present invention is applied to a network device, and specifically includes the following steps:
step 101, acquiring initial transmission parameters of a terminal for initial data transmission, wherein the initial transmission parameters comprise a multiple access sequence identification number and a lead code identification number of the initial data transmission.
In signal transmission of a cellular communication system, due to time-varying characteristics of a wireless channel, multipath fading, some unpredictable interference and the like, signal transmission fails, and therefore, a Forward Error Correction (FEC) coding technique and an Automatic Repeat reQuest (ARQ) method are generally adopted to perform error control, so as to ensure signal transmission quality. In general, ARQ and FEC are used in a wireless packet transmission system, that is, a Hybrid Automatic Repeat reQuest (HARQ) scheme is formed. In HARQ, FEC is adopted to reduce the number of retransmission and the error rate, and ARQ retransmission and CRC check are used to ensure that the occasions such as packet data transmission and the like which require extremely low error rate. The mechanism is a compromise scheme, errors are automatically corrected within the error correction capability range, and if the error correction range is exceeded, the sending end is required to retransmit, so that the reliability of the system is improved, and the transmission efficiency of the system is improved.
When the terminal performs initial transmission, randomly selecting time domain resources, frequency domain resources, a multiple access sequence identification number (MA signature) and a preamble identification number (preamble ID) in a transmission resource pool; the time domain resources include time slots, the frequency domain resources include frequency bins, and so on.
And after the terminal performs initial data transmission, the terminal sends initial transmission parameters to the network side equipment, and the network side equipment acquires the initial transmission parameters.
102, determining a time-frequency parameter of HARQ retransmission of the terminal according to the multiple access sequence identification number and the lead code identification number; the time-frequency parameters at least comprise a time domain offset value and a frequency domain offset value.
When receiving the initial transmission parameter, the network side equipment determines a time-frequency parameter of HARQ retransmission performed by the terminal according to the initial transmission parameter and a preset algorithm; the time-frequency parameters comprise a time domain offset value and a frequency domain offset value; specifically, the time domain offset value represents an offset of the current transmission relative to the time domain position of the last transmission, and the unit is a time slot; the frequency domain offset value represents an offset of the current transmission from the frequency domain position of the previous transmission, and is expressed in Resource Block (RB).
And 103, carrying the time-frequency parameters in retransmission parameters for indicating the terminal to perform HARQ retransmission and indicating the retransmission parameters to the terminal.
The network side equipment carries the time frequency parameter in the retransmission parameter and indicates the retransmission parameter to the terminal, so that when the terminal performs HARQ retransmission, reselection is performed according to the time frequency parameter, a corresponding time domain deviation value and a corresponding frequency domain deviation value are selected, and the time frequency resource position of each HARQ retransmission is determined through a multiple access sequence identification number and a lead code identification number. In the prior art, if the time-frequency resources of initial transmission and retransmission of the terminal and the MA signature are designed to be in a fixed relationship, if the terminal selects the same time-frequency resources and MA signature during initial transmission and retransmission, the retransmission also generates conflict, and information transmitted by the conflicting terminal cannot be removed even through combination; if the terminal completely transmits through randomly selecting the time frequency resource and the MA signature, the base station needs to know the associated information of the initial transmission and the retransmission before decoding, and can carry out soft bit combination.
In the above embodiment of the present invention, by obtaining an initial transmission parameter for a terminal to perform initial data transmission, a time-frequency parameter for the terminal to perform HARQ retransmission is determined according to the multiple access sequence identification number and the preamble identification number; the time-frequency parameters at least comprise a time domain offset value and a frequency domain offset value; the time-frequency parameters are carried in retransmission parameters used for indicating the terminal to perform HARQ retransmission, and the retransmission parameters are indicated to the terminal, so that when the terminal performs HARQ retransmission, reselection is performed according to the time-frequency parameters, and a corresponding time domain offset value and a corresponding frequency domain offset value are selected, thereby effectively avoiding causing time-frequency resource and MAsignaturity conflict, reducing the probability of conflict, and improving the decoding performance. The embodiment of the invention solves the problem that in the prior art, in a 5G communication system, a terminal transmits by using a grant free mode, and retransmission easily causes time-frequency resource and MAsignature conflict.
Optionally, in this embodiment of the present invention, the step of determining, according to the multiple access sequence identification number and the preamble identification number, a time-frequency parameter for the terminal to perform HARQ retransmission includes:
determining an original time domain deviation value and an original frequency domain deviation value of HARQ retransmission of the terminal according to the multiple access sequence identification number and the lead code identification number;
determining a time domain offset value according to the original time domain offset value and a preset time domain threshold value; and
and determining a frequency domain deviation value according to the original frequency domain deviation value and a preset frequency domain threshold value.
Firstly, determining an original time domain deviation value and an original frequency domain deviation value of HARQ retransmission of the terminal according to a multiple access sequence identification number and a lead code identification number; in order to prevent the time-frequency overflow, the original time domain offset value and the original frequency domain offset value are limited again according to the preset frequency domain threshold value and the preset time domain threshold value.
Optionally, in this embodiment of the present invention, the step of determining an original time domain offset value and an original frequency domain offset value of HARQ retransmission performed by the terminal according to the multiple access sequence identification number and the preamble identification number includes:
in the first step, the first step is that,
determining an original time domain offset value of HARQ retransmission of the terminal according to the following formula:
tout1＝ceil{(MAID×PID)＞＞N}；
wherein, tout1For the original time domain offset value, MAIDFor said multiple access sequence identification number, PIDFor the preamble identification number, N is a preset value, which can be determined from empirical values.
The ceil function is used for returning a minimum integer which is greater than or equal to a specified expression; ">" means a shift to the right, tout1Is MAIDAnd PIDThe product of (d) is shifted to the right by the smallest integer after N bits.
And a second step of, in the first step,
and determining an original frequency domain offset value of HARQ retransmission performed by the terminal according to the following formula:
fout1＝mod(MAID×PID,2N)；
wherein f isout1For the original frequency domain offset value, the mod function is the remainder of division operation for two numerical expressions, i.e., MAIDAnd PIDProduct of (2)NThe remainder after division is made between them.
The step of determining a time domain offset value according to the original time domain offset value and a preset time domain threshold value includes:
determining a time domain offset value according to the following formula:
tout2＝mod(tout1,Tu)；
wherein, tout1Is the original time domain offset value; t is tout2Is the time domain offset value; t isuThe time domain is a preset time domain threshold value, namely a maximum time domain range value which can be occupied; wherein, tout2And the final time domain offset value is used for correspondingly protecting the time domain offset value through the formula in order to prevent the overflow of frequency domain resources during the HARQ retransmission.
Similarly, a frequency domain offset value is correspondingly protected, and specifically, the initial transmission parameter further includes the number of resource blocks occupied by the initial data transmission;
the step of determining a frequency domain offset value according to the original frequency domain offset value and a preset frequency domain threshold value includes:
determining a frequency domain offset value according to the following formula:
fout2＝mod(fout1,Fu-BUE)；
wherein f isout1For the original frequency domain offset value, fout2For the frequency domain offset value, BUEFor said number of resource blocks, FuIs a preset frequency domain threshold value, namely the maximum frequency domain range value which can be occupied.
Optionally, in this embodiment of the present invention, the retransmission parameter further includes: retransmission time interval (T)offset) And a retransmission time window, the retransmission time interval being the time interval between the retransmission start time and the initial transmission start (or end) time; retransmission time window (T)win) For limiting the time length occupied by the retransmission, the retransmission is made to be T in the time windowwinSo that the base station has reasonable data processing time and can detect within the time window, ToffsetAnd TwinIt may be a fixed value set in advance or a value determined by higher layer broadcast information.
The invention can reduce the probability of conflict in a 5G communication system under the condition of using a grant free of non-orthogonal multiple access, arrange according to a certain sequence during HARQ retransmission by using time-frequency resources, MA signature and preamble sequence IDs, and solve the problem of time-frequency resource and MA signature conflict in the last transmission by acquiring the associated information corresponding to the initial transmission and retransmission by the arrangement rule, so that the information of conflicting users can be correctly resolved through retransmission, and the decoding performance can be improved.
In the above embodiment of the present invention, by obtaining an initial transmission parameter for a terminal to perform initial data transmission, a time-frequency parameter for the terminal to perform HARQ retransmission is determined according to the multiple access sequence identification number and the preamble identification number; the time-frequency parameters at least comprise a time domain offset value and a frequency domain offset value; the time-frequency parameters are carried in retransmission parameters used for indicating the terminal to perform HARQ retransmission, and the retransmission parameters are indicated to the terminal, so that when the terminal performs HARQ retransmission, reselection is performed according to the time-frequency parameters, and a corresponding time domain offset value and a corresponding frequency domain offset value are selected, thereby effectively avoiding causing time-frequency resource and MAsignaturity conflict, reducing the probability of conflict, and improving the decoding performance. The embodiment of the invention solves the problem that in the prior art, in a 5G communication system, a terminal transmits by using a grant free mode, and retransmission easily causes time-frequency resource and MAsignature conflict.
In the above, the hybrid automatic repeat request HARQ transmission control method provided in the embodiment of the present invention is introduced from the network side device side, and as another aspect of the embodiment of the present invention, the hybrid automatic repeat request HARQ transmission control method provided in the embodiment of the present invention is introduced from the terminal side.
Referring to fig. 2, an embodiment of the present invention provides a method for controlling HARQ transmission, which is applied to a terminal, and the method includes:
step 201, sending initial transmission parameters for performing initial data transmission to a network side device, where the initial transmission parameters include a multiple access sequence identification number and a preamble identification number of the initial data transmission.
In signal transmission of a cellular communication system, due to time-varying characteristics of a wireless channel, multipath fading, some unpredictable interference and the like, signal transmission fails, and therefore, a Forward Error Correction (FEC) coding technique and an Automatic Repeat reQuest (ARQ) method are generally adopted to perform error control, so as to ensure signal transmission quality. In general, ARQ and FEC are used in a wireless packet transmission system, that is, a Hybrid Automatic Repeat reQuest (HARQ) scheme is formed. In HARQ, FEC is adopted to reduce the number of retransmission and the error rate, and ARQ retransmission and CRC check are used to ensure that the occasions such as packet data transmission and the like which require extremely low error rate. The mechanism is a compromise scheme, errors are automatically corrected within the error correction capability range, and if the error correction range is exceeded, the sending end is required to retransmit, so that the reliability of the system is improved, and the transmission efficiency of the system is improved.
When the terminal performs initial transmission, randomly selecting time domain resources, frequency domain resources, a multiple access sequence identification number (MA signature) and a preamble identification number (preamble ID) in a transmission resource pool; the time domain resources include time slots, the frequency domain resources include frequency bins, and so on.
And after the terminal performs initial data transmission, the terminal sends initial transmission parameters to the network side equipment.
Step 202, receiving a retransmission parameter of HARQ retransmission indicated by the network side device, where the retransmission parameter carries a time-frequency parameter of HARQ retransmission determined by the network side device according to the multiple access sequence identification number and the preamble identification number; the time-frequency parameters at least comprise a time domain offset value and a frequency domain offset value.
When receiving the initial transmission parameter, the network side equipment determines a time-frequency parameter of HARQ retransmission performed by the terminal according to the initial transmission parameter and a preset algorithm; the time-frequency parameters comprise a time domain offset value and a frequency domain offset value; specifically, the time domain offset value represents an offset of the current transmission relative to the time domain position of the last transmission, and the unit is a time slot; the frequency domain offset value represents an offset of the current transmission from the frequency domain position of the previous transmission, and is expressed in Resource Block (RB).
Optionally, in this embodiment of the present invention, the time domain offset value is determined by the network side device according to an original time domain offset value and a preset time domain threshold, and satisfies the following formula:
tout2＝mod(tout1,Tu)；
wherein, tout1Is the original time domain offset value, tout2Is the time domain offset value, TuIs a preset time domain threshold value.
Further, the original time domain offset value is determined by the network side device according to the multiple access sequence identification number and the preamble identification number, and satisfies the following formula:
tout1＝ceil{(MAID×PID)＞＞N}；
wherein, tout1For the original time domain offset value, MAIDFor said multiple access sequence identification number, PIDAnd N is a preset value, wherein the number is the lead code identification number.
Optionally, in this embodiment of the present invention, the initial transmission parameter further includes a number of resource blocks occupied by the initial data transmission; the frequency domain offset value is determined by the network side equipment according to an original frequency domain offset value and a preset frequency domain threshold value, and the frequency domain offset value meets the following formula:
fout2＝mod(fout1,Fu-BUE)；
wherein f isout1For the original frequency domain offset value, fout2For the frequency domain offset value, BUEFor said number of resource blocks, FuIs a preset frequency domain threshold value, namely the maximum frequency domain range value which can be occupied.
Further, the original frequency domain offset value is determined by the network side device according to the multiple access sequence identification number and the preamble identification number, and satisfies the following formula:
fout1＝mod(MAID×PID,2N)；
wherein, tout1For the original frequency domain offset value, MAIDFor said multiple accessInto sequence identification number, PIDAnd N is a preset value, wherein the number is the lead code identification number.
In the above embodiment of the present invention, initial transmission parameters for performing initial data transmission are sent to a network side device, where the initial transmission parameters include a multiple access sequence identification number and a preamble identification number for the initial data transmission; receiving retransmission parameters of HARQ retransmission indicated by the network side equipment, wherein the retransmission parameters carry time-frequency parameters of the HARQ retransmission determined by the network side equipment according to the multiple access sequence identification number and the lead code identification number; when the terminal performs HARQ retransmission, reselection is performed according to the time-frequency parameters, and the corresponding time-domain offset value and the corresponding frequency-domain offset value are selected, so that time-frequency resource and MA signature conflict are effectively avoided, the probability of conflict is reduced, and the decoding performance is improved. The embodiment of the invention solves the problem that in the prior art, in a 5G communication system, a terminal transmits by using a grant free mode, and retransmission easily causes time-frequency resource and MA signature conflict.
The hybrid automatic repeat request HARQ transmission control method according to the embodiment of the present invention is described above, and a hybrid automatic repeat request HARQ transmission control apparatus according to the embodiment of the present invention will be described below with reference to the accompanying drawings.
Referring to fig. 3, an embodiment of the present invention provides a hybrid automatic repeat request HARQ transmission control apparatus, which is applied to a network device, and the apparatus includes:
an obtaining module 301, configured to obtain a first transmission parameter for a terminal to perform first data transmission, where the first transmission parameter includes a multiple access sequence identification number and a preamble identification number for the first data transmission;
a determining module 302, configured to determine, according to the multiple access sequence identification number and the preamble identification number, a time-frequency parameter for HARQ retransmission performed by the terminal; the time-frequency parameters at least comprise a time domain offset value and a frequency domain offset value;
an indicating module 303, configured to carry the time-frequency parameter in a retransmission parameter for indicating the terminal to perform HARQ retransmission, and indicate the time-frequency parameter to the terminal.
Optionally, in this embodiment of the present invention, the determining module 302 includes:
the first determining submodule is used for determining an original time domain deviation value and an original frequency domain deviation value of HARQ retransmission of the terminal according to the multiple access sequence identification number and the lead code identification number;
the second determining submodule is used for determining a time domain offset value according to the original time domain offset value and a preset time domain threshold value; and
and the third determining submodule is used for determining the frequency domain deviation value according to the original frequency domain deviation value and a preset frequency domain threshold value.
Optionally, in this embodiment of the present invention, the first determining sub-module is configured to:
determining an original time domain offset value of HARQ retransmission of the terminal according to the following formula:
tout1＝ceil{(MAID×PID)＞＞N}；
wherein, tout1For the original time domain offset value, MAIDFor said multiple access sequence identification number, PIDThe lead code identification number is N, and N is a preset value;
and determining an original frequency domain offset value of HARQ retransmission performed by the terminal according to the following formula:
fout1＝mod(MAID×PID,2N)；
wherein f isout1Is the original frequency domain offset value.
Optionally, in this embodiment of the present invention, the second determining sub-module is configured to:
determining a time domain offset value according to the following formula:
tout2＝mod(tout1,Tu)；
wherein, tout1Is the original time domain offset value, tout2Is the time domain offset value, TuIs a preset time domain threshold value.
Optionally, in this embodiment of the present invention, the initial transmission parameter further includes a number of resource blocks occupied by the initial data transmission;
the second determination submodule is configured to:
determining a frequency domain offset value according to the following formula:
fout2＝mod(fout1,Fu-BUE)；
wherein f isout1For the original frequency domain offset value, fout2For the frequency domain offset value, BUEFor said number of resource blocks, FuIs a preset frequency domain threshold value.
Optionally, in this embodiment of the present invention, the retransmission parameter further includes: a retransmission time interval and a retransmission time window.
In the above embodiment of the present invention, the obtaining module 301 obtains the initial transmission parameter of the terminal for performing the initial data transmission, and the determining module 302 determines the time-frequency parameter of the terminal for performing the HARQ retransmission according to the multiple access sequence identification number and the preamble identification number; the time-frequency parameters at least comprise a time domain offset value and a frequency domain offset value; the indication module 303 carries the time-frequency parameter in a retransmission parameter for indicating the terminal to perform HARQ retransmission, and indicates the time-frequency parameter to the terminal, so that when the terminal performs HARQ retransmission, reselection is performed according to the time-frequency parameter, and a corresponding time domain offset value and a corresponding frequency domain offset value are selected, thereby effectively avoiding causing time-frequency resource and MA signature collision, reducing the probability of collision, and improving the decoding performance. The embodiment of the invention solves the problem that in the prior art, in a 5G communication system, a terminal transmits by using a grant free mode, and retransmission easily causes time-frequency resource and MA signature conflict.
Referring to fig. 4, an embodiment of the present invention provides a hybrid automatic repeat request HARQ transmission control apparatus, which is applied to a terminal, and the apparatus includes:
a sending module 401, configured to send, to a network side device, an initial transmission parameter for performing initial data transmission, where the initial transmission parameter includes a multiple access sequence identification number and a preamble identification number of the initial data transmission;
a receiving module 402, configured to receive a retransmission parameter of an HARQ retransmission indicated by the network side device, where the retransmission parameter carries a time-frequency parameter of the HARQ retransmission determined by the network side device according to the multiple access sequence identification number and the preamble identification number; the time-frequency parameters at least comprise a time domain offset value and a frequency domain offset value.
In the above embodiment of the present invention, a sending module 401 sends an initial transmission parameter for performing initial data transmission to a network side device, where the initial transmission parameter includes a multiple access sequence identification number and a preamble identification number for the initial data transmission, and a receiving module 402 receives a retransmission parameter of HARQ retransmission indicated by the network side device, where the retransmission parameter carries a time-frequency parameter of HARQ retransmission determined by the network side device according to the multiple access sequence identification number and the preamble identification number; when the terminal performs HARQ retransmission, reselection is performed according to the time-frequency parameters, and the corresponding time-domain offset value and the corresponding frequency-domain offset value are selected, so that time-frequency resource and MA signature conflict are effectively avoided, the probability of conflict is reduced, and the decoding performance is improved. The embodiment of the invention solves the problem that in the prior art, in a 5G communication system, a terminal transmits by using a grant free mode, and retransmission easily causes time-frequency resource and MA signature conflict.
Fig. 5 is a schematic structural diagram of an electronic device according to yet another embodiment of the present invention.
As shown in fig. 5, the electronic device may include: a processor (processor)510, a communication Interface (Communications Interface)520, a memory (memory)530 and a communication bus 540, wherein the processor 510, the communication Interface 520 and the memory 530 communicate with each other via the communication bus 540. Processor 510 may call logic instructions in memory 530 to perform the following method:
acquiring initial transmission parameters of a terminal for initial data transmission, wherein the initial transmission parameters comprise a multiple access sequence identification number and a lead code identification number of the initial data transmission;
determining a time-frequency parameter of HARQ retransmission of the terminal according to the multiple access sequence identification number and the lead code identification number; the time-frequency parameters at least comprise a time domain offset value and a frequency domain offset value;
and carrying the time-frequency parameter in a retransmission parameter for indicating the terminal to perform HARQ retransmission and indicating the retransmission parameter to the terminal.
Furthermore, the logic instructions in the memory 530 may be implemented in the form of software functional units and stored in a computer readable storage medium when the software functional units are sold or used as independent products.
In another embodiment of the present invention, a non-transitory computer-readable storage medium is provided, where a computer program is stored on the non-transitory computer-readable storage medium, and when the computer program is executed by a processor, the steps in the method provided in the foregoing embodiment of the present invention are implemented, and details of the implementation are not repeated.
Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (11)

1. A hybrid automatic repeat request (HARQ) transmission control method is applied to network side equipment and is characterized by comprising the following steps:
acquiring initial transmission parameters of a terminal for initial data transmission, wherein the initial transmission parameters comprise a multiple access sequence identification number and a lead code identification number of the initial data transmission;
determining a time-frequency parameter of HARQ retransmission of the terminal according to the multiple access sequence identification number and the lead code identification number; the time-frequency parameters at least comprise a time domain offset value and a frequency domain offset value;
and carrying the time-frequency parameter in a retransmission parameter for indicating the terminal to perform HARQ retransmission and indicating the retransmission parameter to the terminal.
2. The method according to claim 1, wherein the step of determining the time-frequency parameter for HARQ retransmission by the terminal according to the multiple access sequence identification number and the preamble identification number comprises:
determining an original time domain deviation value and an original frequency domain deviation value of HARQ retransmission of the terminal according to the multiple access sequence identification number and the lead code identification number;
determining a time domain offset value according to the original time domain offset value and a preset time domain threshold value; and
and determining a frequency domain deviation value according to the original frequency domain deviation value and a preset frequency domain threshold value.
3. The method according to claim 2, wherein the step of determining the original time domain offset value and the original frequency domain offset value for HARQ retransmission by the terminal according to the multiple access sequence identification number and the preamble identification number comprises:
determining an original time domain offset value of HARQ retransmission of the terminal according to the following formula:
tout1＝ceil{(MAID×PID)＞＞N}；
wherein, tout1For the original time domain offset value, MAIDFor said multiple access sequence identification number, PIDThe lead code identification number is N, and N is a preset value;
and
determining an original frequency domain offset value of HARQ retransmission of the terminal according to the following formula:
fout1＝mod(MAID×PID，2N)；
wherein f isout1Is the original frequency domain offset value.
4. The method according to claim 2, wherein the step of determining the time domain offset value according to the original time domain offset value and a preset time domain threshold value comprises:
determining a time domain offset value according to the following formula:
tout2＝mod(tout1，Tu)；
wherein, tout1Is the original time domain offset value, tout2Is the time domain offset value, TuIs a preset time domain threshold value.
5. The method of claim 2, wherein the initial transmission parameter further comprises a number of resource blocks occupied by the initial data transmission;
the step of determining a frequency domain offset value according to the original frequency domain offset value and a preset frequency domain threshold value includes:
determining a frequency domain offset value according to the following formula:
fout2＝mod(fout1，Fu-BUE)；
wherein f isout1For the original frequency domain offset value, fout2For the frequency domain offset value, BUEFor said number of resource blocks, FuIs a preset frequency domain threshold value.
6. The method of claim 1, wherein the retransmission parameters further comprise: a retransmission time interval and a retransmission time window.
7. A hybrid automatic repeat request (HARQ) transmission control method is applied to a terminal, and is characterized by comprising the following steps:
sending initial transmission parameters for primary data transmission to network side equipment, wherein the initial transmission parameters comprise a multiple access sequence identification number and a lead code identification number of the primary data transmission;
receiving retransmission parameters of HARQ retransmission indicated by the network side equipment, wherein the retransmission parameters carry time-frequency parameters of the HARQ retransmission determined by the network side equipment according to the multiple access sequence identification number and the lead code identification number; the time-frequency parameters at least comprise a time domain offset value and a frequency domain offset value.
8. A hybrid automatic repeat request (HARQ) transmission control device is applied to a network side device, and is characterized by comprising:
the system comprises an acquisition module, a transmission module and a transmission module, wherein the acquisition module is used for acquiring initial transmission parameters of a terminal for initial data transmission, and the initial transmission parameters comprise a multiple access sequence identification number and a lead code identification number of the initial data transmission;
a determining module, configured to determine, according to the multiple access sequence identification number and the preamble identification number, a time-frequency parameter for HARQ retransmission performed by the terminal; the time-frequency parameters at least comprise a time domain offset value and a frequency domain offset value;
and the indicating module is used for carrying the time-frequency parameter in a retransmission parameter for indicating the terminal to carry out HARQ retransmission and indicating the time-frequency parameter to the terminal.
9. An apparatus for controlling HARQ transmission, applied to a terminal, the apparatus comprising:
a sending module, configured to send, to a network side device, an initial transmission parameter for performing initial data transmission, where the initial transmission parameter includes a multiple access sequence identification number and a preamble identification number of the initial data transmission;
a receiving module, configured to receive a retransmission parameter of an HARQ retransmission indicated by the network side device, where the retransmission parameter carries a time-frequency parameter of the HARQ retransmission determined by the network side device according to the multiple access sequence identification number and the preamble identification number; the time-frequency parameters at least comprise a time domain offset value and a frequency domain offset value.
10. An electronic device, comprising a memory, a processor, a bus and a computer program stored on the memory and executable on the processor, which when executed by the processor implements the steps in the hybrid automatic repeat request, HARQ, transmission control method according to any of claims 1 to 7.
11. A non-transitory computer-readable storage medium having stored thereon a computer program, characterized in that: the program when executed by a processor implements the steps in a hybrid automatic repeat request, HARQ, transmission control method according to any of claims 1 to 7.
CN201811203159.8A 2018-10-16 2018-10-16 Hybrid automatic repeat request HARQ transmission control method and device Withdrawn CN111064550A (en)

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