CN114915390A - Cyclic prefix extension generation and indication method, device and readable storage medium - Google Patents

Cyclic prefix extension generation and indication method, device and readable storage medium Download PDF

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Publication number
CN114915390A
CN114915390A CN202110182699.8A CN202110182699A CN114915390A CN 114915390 A CN114915390 A CN 114915390A CN 202110182699 A CN202110182699 A CN 202110182699A CN 114915390 A CN114915390 A CN 114915390A
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cyclic prefix
symbol
prefix extension
symbols
gap
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张萌
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Spreadtrum Communications Shanghai Co Ltd
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Spreadtrum Communications Shanghai Co Ltd
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Priority to CN202110182699.8A priority Critical patent/CN114915390A/en
Priority to PCT/CN2022/075441 priority patent/WO2022166975A1/en
Publication of CN114915390A publication Critical patent/CN114915390A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—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
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • 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
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]

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  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

A cyclic prefix extension generation and indication method, a device and a readable storage medium are provided, wherein the method comprises the following steps: receiving configuration information; the configuration information is used for indicating the number N of borrowed target symbols, and the target symbols are symbols used for transmitting data information; n is more than or equal to 1; and generating the cyclic prefix extension according to the configuration information. The above scheme can determine the target symbols required to generate the CPE and generate the CPE.

Description

Cyclic prefix extension generation and indication method, device and readable storage medium
Technical Field
The present invention relates to the field of wireless communications technologies, and in particular, to a cyclic prefix extension generation and indication method, apparatus, and readable storage medium.
Background
Cyclic Prefix Extension (CPE) is introduced in 5G NR-u (new Radio in Unlicensed spectrum), and its purpose is to manufacture a Gap (Gap) with a duration of 25 μ s/16 μ s/25 μ s + TA (Timing Advance)/16 μ s + TA in order to meet the requirements of two existing CAT LBTs, and the Gap can be used by the ue to Listen Before Talk (Listen Talk, LBT), and data can be transmitted after LBT passes.
After introducing CPE, it may result in some symbols (symbols) in the slot not being used for normal data transmission. Some of these symbols, which cannot be used for normal data transmission, may be combined with the Cyclic Prefix (CP) of the next symbol to form a CPE.
However, the determination of which symbols are not used for normal data transmission and the use of these symbols to generate CPEs is not explicitly mentioned in the prior art.
Disclosure of Invention
The embodiment of the invention solves the problem of determining the target symbols required by the CPE and generating the CPE.
To solve the foregoing technical problem, an embodiment of the present invention provides a cyclic prefix extension generating method, including: receiving configuration information; the configuration information is used for indicating the number N of borrowed target symbols, and the target symbols are symbols used for transmitting data information; n is more than or equal to 1; and generating the cyclic prefix extension according to the configuration information.
Optionally, the generating the cyclic prefix extension according to the configuration information includes: obtaining the number of gap symbols corresponding to 1 time slot; and generating the cyclic prefix extension according to the configuration information, the cyclic prefix extension type and the number of the gap symbols.
Optionally, the generating the cyclic prefix extension according to the configuration information, the cyclic prefix extension type, and the number of the gap symbols includes: determining a borrowed target symbol according to the configuration information; the borrowed target symbol is adjacent to the gap symbol; determining the duration of listening before speaking according to the cyclic prefix extension type; and in the total time length corresponding to the gap symbol and the target symbol, removing the time length for listening before speaking, and combining the residual time length with the cyclic prefix in the next symbol for transmitting data information to generate the cyclic prefix extension.
Optionally, the number of gap symbols corresponding to the current time slot is 1.
Optionally, the gap symbol is located in the last symbol of the current slot; generating the cyclic prefix extension according to the configuration information, the cyclic prefix extension type and the number of the gap symbols includes: determining the target symbols as N symbols adjacent to the gap symbols in the current time slot according to the configuration information; determining the duration of listening before speaking according to the cyclic prefix extension type; removing the duration for listening before speaking from the total duration corresponding to the gap symbol and the target symbol, and combining the remaining duration with the cyclic prefix of the first symbol in the next time slot to generate the cyclic prefix extension; the next time slot is adjacent to the current time slot.
Optionally, the gap symbol is located in the last symbol of the current slot; generating the cyclic prefix extension according to the configuration information, the cyclic prefix extension type and the number of the gap symbols includes: determining the target symbol as N symbols adjacent to the gap symbol in the next time slot according to the configuration information; the next time slot is adjacent to the current time slot; determining the duration of listening before speaking according to the cyclic prefix extension type; and removing the duration of listening before speaking from the total duration corresponding to the gap symbol and the target symbol, and combining the remaining duration with the cyclic prefix of the (N + 1) th symbol in the next time slot to generate the cyclic prefix extension.
Optionally, the gap symbol corresponding to the current timeslot includes a first gap symbol and a second gap symbol, and the first gap symbol is located before the second gap symbol in time sequence.
Optionally, the generating the cyclic prefix extension according to the configuration information, the cyclic prefix extension type, and the number of the gap symbols includes: determining the target symbols as N symbols which are adjacent to and before a first gap symbol in the current time slot according to the configuration information; determining the duration of listening before speaking according to the cyclic prefix extension type; and in the total time length corresponding to the first gap symbol and the target symbol, removing the time length for listening before speaking, and combining the residual time length with the cyclic prefix of the first symbol after the first gap symbol to generate the cyclic prefix extension.
Optionally, the generating the cyclic prefix extension according to the configuration information, the cyclic prefix extension type, and the number of the gap symbols includes: determining the target symbols as N symbols which are adjacent to and behind a first gap symbol in the current time slot according to the configuration information; determining the duration of listening before speaking according to the cyclic prefix extension type; and in the total time length corresponding to the first gap symbol and the target symbol, removing the time length for listening before speaking, and combining the residual time length with the cyclic prefix of the (N + 1) th symbol after the first gap symbol to generate the cyclic prefix extension.
Optionally, the generating the cyclic prefix extension according to the configuration information, the cyclic prefix extension type, and the number of the gap symbols includes: determining the target symbols as N symbols which are adjacent to the first gap symbol and are positioned before the second gap symbol in the current time slot according to the configuration information; determining the duration of listening before speaking according to the cyclic prefix extension type; and in the total time length corresponding to the second gap symbol and the target symbol, removing the time length for listening before speaking, and combining the residual time length with the cyclic prefix of the first symbol after the second gap symbol to generate the cyclic prefix extension.
Optionally, if the second slot symbol is the last symbol in the current slot, the first symbol after the second slot symbol is the 1 st symbol of the next slot, and the next slot is adjacent to the current slot.
Optionally, the generating the cyclic prefix extension according to the configuration information, the cyclic prefix extension type, and the number of the gap symbols includes: determining the target symbols as N symbols which are adjacent to the first gap symbol and are positioned after the second gap symbol in the current time slot according to the configuration information; determining the duration of listening before speaking according to the cyclic prefix extension type; and in the total time length corresponding to the second gap symbol and the target symbol, removing the time length for listening before speaking, and combining the residual time length with the cyclic prefix of the (N + 1) th symbol after the second gap symbol to generate the cyclic prefix extension.
Optionally, if the second slot symbol is the last symbol in the current slot, the N symbols after the second slot symbol are the first N symbols of the next slot, and the N +1 th symbol after the second slot symbol is the N +1 th symbol of the next slot; the next time slot is adjacent to the current time slot.
Optionally, the receiving the configuration information includes any one of: receiving downlink control information, and acquiring the configuration information from the downlink control information; and receiving a high-level signaling, and acquiring the configuration information from the high-level signaling.
The embodiment of the invention also provides an indication method for cyclic prefix extension generation, which comprises the following steps: generating configuration information, wherein the configuration information is used for indicating the number N of target symbols borrowed by user equipment, and the target symbols are symbols used for transmitting data information; n is more than or equal to 1; and issuing the configuration information to the user equipment.
An embodiment of the present invention further provides a cyclic prefix extension generating device, including: a receiving unit for receiving configuration information; the configuration information is used for indicating the number N of borrowed target symbols, and the target symbols are symbols used for transmitting data information; n is more than or equal to 1; a first generating unit, configured to generate the cyclic prefix extension according to the configuration information.
An embodiment of the present invention further provides an apparatus for indicating cyclic prefix extension generation, including: a second generating unit, configured to generate configuration information, where the configuration information is used to indicate a number N of target symbols borrowed by user equipment, and the target symbols are symbols used for transmitting data information; n is more than or equal to 1; and the sending unit is used for sending the configuration information to the user equipment.
An embodiment of the present invention further provides a computer-readable storage medium, which is a non-volatile storage medium or a non-transitory storage medium, and on which a computer program is stored, where the computer program is executed by a processor to perform any of the steps of the cyclic prefix extension generation method described above, or to perform the step of the indication method of cyclic prefix extension generation described above.
The embodiment of the present invention further provides another cyclic prefix extension generating device, which includes a memory and a processor, where the memory stores a computer program that can be executed on the processor, and the processor executes the steps of any one of the cyclic prefix extension generating methods when executing the computer program.
The embodiment of the present invention further provides an indication apparatus for cyclic prefix extension generation, including a memory and a processor, where the memory stores a computer program that can be run on the processor, and the processor executes the steps of the indication method for cyclic prefix extension generation when running the computer program.
Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:
the number N of target symbols is determined from the received configuration information. From the configuration information, it can be determined which target symbols to use, and the cyclic prefix extension can be generated from the determined target symbols. Thus, the scheme in the present application is able to determine the target symbol used and generate a cyclic prefix extension.
Drawings
Fig. 1 is a flowchart of a cyclic prefix extension generation method in an embodiment of the present invention;
fig. 2 is a schematic diagram of a symbol distribution corresponding to a time slot in edge link communication;
FIG. 3 is a diagram illustrating symbol distribution corresponding to a time slot in another edge link communication;
fig. 4 is a schematic diagram of cyclic prefix extension generation in an embodiment of the present invention;
fig. 5 is a schematic diagram of another cyclic prefix extension generation in an embodiment of the present invention;
fig. 6 is a schematic diagram of cyclic prefix extension generation in an embodiment of the present invention;
fig. 7 is a schematic diagram of another cyclic prefix extension generation in an embodiment of the present invention;
fig. 8 is a schematic diagram of cyclic prefix extension generation in an embodiment of the present invention;
fig. 9 is a schematic diagram of another cyclic prefix extension generation in an embodiment of the present invention;
fig. 10 is a schematic diagram of cyclic prefix extension generation in an embodiment of the present invention;
fig. 11 is a schematic diagram of another cyclic prefix extension generation in an embodiment of the present invention;
fig. 12 is a diagram illustrating cyclic prefix extension generation in an embodiment of the present invention;
fig. 13 is a schematic diagram of another cyclic prefix extension generation in an embodiment of the present invention;
fig. 14 is a diagram illustrating cyclic prefix extension generation in an embodiment of the present invention;
fig. 15 is a schematic diagram of another cyclic prefix extension generation in an embodiment of the present invention;
fig. 16 is a schematic structural diagram of a cyclic prefix extension generating apparatus in an embodiment of the present invention.
Detailed Description
In the prior art, there is no explicit scheme to indicate which symbols are used in generating the cyclic prefix extension.
In the embodiment of the invention, the number N of the target symbols is determined from the received configuration information. From the configuration information, it can be determined which target symbols to use, and the cyclic prefix extension can be generated from the determined target symbols. Thus, the scheme in the present application is able to determine the target symbol used and generate a cyclic prefix extension.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
An embodiment of the present invention provides a cyclic prefix extension generating method, which is described in detail with reference to fig. 1 through specific steps.
In the embodiment of the present invention, the cyclic prefix extension generating method provided in steps S101 to S102 described below may be executed by the user equipment. Specifically, the following steps S101 to S102 may be executed by a baseband chip in the user equipment, or executed by a chip module including the baseband chip in the user equipment.
Step S101, receiving configuration information.
In particular implementations, the configuration information may be used to indicate the number of borrowing symbols, N. The configuration Information may be issued by the base station through a high-level signaling, may also be issued by Downlink Control Information (DCI), and may also be issued by other types of signaling such as MAC CE. The higher layer signaling may be Radio Resource Control (RRC) signaling.
In the embodiment of the present invention, the borrowed symbol may be a symbol used for transmitting data information. In side link communication, one slot (slot) includes 14 symbols, which may include 1 Gap symbol (Gap symbol) or two Gap symbols. When 1 slot does not include a Physical Sidelink Feedback Channel (PSFCH), 1 slot symbol may be included in 1 slot; when 1 slot includes PSFCH, 2 slot symbols may be included in 1 slot.
Thus, in 1 slot, not all 14 symbols may be used for edge link transmission. The number of symbols that can be specifically configured for side-link communication can be obtained by higher layer signaling configuration. For ease of discussion, these symbols that may be used for side-link communications are referred to herein as side-link symbols. Specifically, in addition to the gap symbol, other side link symbols in 1 slot may be used for side link information transmission.
In the following discussion, for convenience of discussion, it is assumed that 14 symbols in 1 slot are all configured as edge link symbols. However, the embodiment can be generalized to other cases of the number of edge link symbols.
Specifically, when 1 slot does not include a PSFCH, the remaining 13 symbols, except 1 gap symbol, are used to carry a Physical Sidelink Shared Channel (pscch). When 1 slot includes PSFCH, some of the remaining 12 symbols, except for 2 gap symbols, may be used for transmission of PSSCH and another part for transmission of PSFCH.
Referring to fig. 2, a schematic diagram of a symbol distribution corresponding to a time slot in edge link communication is shown. Referring to fig. 3, a schematic diagram of a symbol distribution corresponding to a slot in another side-link communication is shown.
In fig. 2, one slot in the edge link communication includes 1 Gap symbol (Gap), and the remaining 13 symbols are used to carry the pscch. In fig. 3, one slot in the edge link communication includes 2 Gap symbols (Gap), two symbols are used to carry the PSFCH, and the remaining 10 symbols are used to carry the PSSCH.
In particular implementations, when introducing cyclic prefix extension in edge link communications, gap symbols may be prioritized for use. If the duration of the gap symbol is not long enough to perform listen-before-talk operation, a symbol for transmitting data information adjacent to the gap symbol may be borrowed, and the borrowed symbol is simply referred to as a target symbol.
Step S102, according to the configuration information, the cyclic prefix extension is generated.
In particular implementations, a cyclic prefix extension can be generated based on the received configuration information. As can be seen from the foregoing embodiments, the number of gap symbols corresponding to 1 timeslot in the edge link communication may be 1, and may also be 2, so that the number of gap symbols corresponding to 1 timeslot may be obtained first. And then, generating the cyclic prefix extension according to the configuration information, the cyclic prefix extension type and the number of the gap symbols.
In the embodiment of the present invention, when the number of the gap symbols corresponding to 1 timeslot is 1, the number of the target symbols and which symbols need to be borrowed are determined according to the value of Ci carried in the configuration information, where the target symbols are adjacent to the gap symbols and both located before the gap symbols or both located after the gap symbols.
Based on the cyclic prefix extension type, a length of time to Listen Before Talk (LBT) may be determined. In practical applications, the cyclic prefix extension types may include the following: the time domain length (time length) corresponding to the type C1 is symbol _ length-16 μ s, the time domain length corresponding to the type C2 is symbol _ length-25 μ s, the time domain length corresponding to the type C3 is symbol _ length-16 μ s-TA, and the time domain length corresponding to the type C4 is symbol _ length-25 μ s-TA. The several CPE types described above may be supported in whole or in part in the sidelink. The specific supported cyclic prefix extension of which Ci type can be indicated by higher layer signaling, or DCI, or MAC-CE.
In the embodiment of the present invention, the listen-before-talk duration corresponding to the cyclic prefix extension type may be determined according to the cyclic prefix extension type. For example, corresponding to a cyclic prefix extension of the type C1, which corresponds to a listen-before-talk duration of 16 μ s; accordingly, corresponding to a cyclic prefix extension of type C2, which corresponds to a listen-before-talk duration of 25 μ s; a cyclic prefix extension corresponding to type C3, with a corresponding listen-before-talk duration of 16 μ s; correspondingly, corresponding to a cyclic prefix extension of the type C4, which corresponds to a listen-before-talk duration of 25 μ s.
In the embodiment of the present invention, the configuration information issued by the base station may carry values corresponding to different cyclic prefix extension types. When a value corresponding to a certain cyclic prefix extension type is 3, it means that the number N of target symbols is 3-1-2. When the value corresponding to a certain cyclic prefix extension type is 2, this means that the number N of target symbols is 1. When the value corresponding to a certain cyclic prefix extension type is 1, the number of the target symbols is 0, that is, the target symbols are not needed. It should be noted that the target symbol can no longer be used for transmitting PSSCH or PSFCH.
In a specific implementation, after the number N of borrowed target symbols is determined, the total duration T of the gap symbols corresponding to the target symbols can be determined. Setting the duration of carrying out listen before talk as T1, in the total duration T, the former T1 duration is used for carrying out listen before talk, and the residual T-T1 duration is combined with the cyclic prefix in the next symbol for transmitting data information to generate cyclic prefix extension. Furthermore, the target symbol cannot be used for transmission of psch or PSFCH.
In the embodiment of the present invention, if the gap symbol is located in the last symbol of 1 slot, the target symbol may be N symbols before the last symbol, or N symbols before the next slot. If the target symbol is N symbols before the last symbol, removing the duration occupied by listening before speaking and/or TA from the total duration of the gap symbol and the adjacent and N symbols before the gap symbol, and combining the remaining duration with the cyclic prefix of the 1 st symbol of the next time slot to generate cyclic prefix extension; if the target symbol is the first N symbols of the next adjacent time slot, the duration occupied by listening before speaking and/or TA is removed from the total duration of the gap symbol and the first N symbols of the next adjacent time slot, and the remaining duration is combined with the cyclic prefix of the (N + 1) th symbol of the next time slot to generate cyclic prefix extension.
For example, when the cyclic prefix extension type adopted is C1 type, the gap symbol is set to be located at the last symbol of slot 1, and the target symbol is 1 symbol before the last symbol, that is: the gap symbol is the 14 th symbol in slot 1 and the target symbol is the 13 th symbol in slot 1. In the total time length corresponding to the 13 th symbol and the 14 th symbol, firstly listening and then speaking are carried out, the occupied time length of listening and then speaking is 16 mu s, and the residual time is combined with the cyclic prefix of the 1 st symbol of the next adjacent time slot to generate cyclic prefix extension. At this time, the 13 th symbol in the slot may not be used to carry data information.
For another example, when the cyclic prefix extension type adopted is the type C2, the gap symbol is set to be located in the last 1 symbol of slot 1, and the target symbol is the 1 st symbol of the next adjacent slot, that is: the gap symbol is the 14 th symbol in slot 1 and the target symbol is the 1 st symbol in slot 2. In the total time length corresponding to the gap symbol and the 1 st symbol of the time slot 2, firstly listening before speaking, the occupied time length of listening before speaking is 25 mus, and the residual time is combined with the cyclic prefix of the 2 nd symbol of the time slot 2 to generate cyclic prefix extension.
In specific implementation, when the number of the gap symbols corresponding to 1 timeslot is 2, the number of the target symbols is determined according to a specific numerical value of the Ci type carried in the configuration information, and further which symbols need to be borrowed is determined. The target symbols are adjacent to the gap symbols and both precede the gap symbols or both follow the gap symbols.
In the embodiment of the present invention, when the number of the gap symbols corresponding to 1 timeslot is 2, the target symbol may be adjacent to and before the first gap symbol, or adjacent to and after the first gap symbol. Correspondingly, the target symbol may also be adjacent to and before the second gap symbol, and the target symbol may also be adjacent to and after the second gap symbol.
A specific case where the number of gap symbols corresponding to 1 slot is 1 will be described below.
The subcarrier spacing is set to be 60KHz, and the cyclic prefix extension type is C2 type. In practical application, it can be known that, when the subcarrier interval is 60KHz, the duration of the 1 st symbol is 18.36 μ s in 14 symbols corresponding to 1 timeslot, and the duration of the remaining 13 symbols is 17.84 μ s.
Referring to fig. 14, a schematic diagram of cyclic prefix extension generation in the embodiment of the present invention is shown. Referring to fig. 15, a schematic diagram of another cyclic prefix extension generation in the embodiment of the present invention is shown.
In fig. 14, if the value of the type C2 carried in the configuration information is set to 2, the number of target symbols is determined to be 1. The gap symbol is located at the 14 th symbol of the slot 1, and the target symbol is determined as the 13 th symbol of the slot 1. Of the total time duration corresponding to the 13 th symbol and the 14 th symbol in the slot 1, the first 25 μ s of time duration is used for performing LBT operation, and the remaining time and the cyclic prefix in the 1 st symbol of the slot 2 generate cyclic prefix extension.
In fig. 15, if the value of the type C2 carried in the configuration information is set to 2, the number of target symbols is determined to be 1. The gap symbol is located at the 14 th symbol of slot 1, and the target symbol is determined to be the 1 st symbol of slot 2. In the total duration corresponding to the 14 th symbol in the slot 1 and the 1 st symbol in the slot 2, the duration of the first 25 μ s is used for performing LBT operation, and the remaining time and the cyclic prefix in the 2 nd symbol in the slot 2 generate cyclic prefix extension.
It can be understood that, for different subcarrier intervals and different cyclic prefix extension types, generation of cyclic prefix extensions corresponding thereto may refer to fig. 14 and fig. 15, which is not described in detail in the embodiments of the present invention.
The following describes a specific case where the number of slot symbols corresponding to 1 slot is 2.
The subcarrier spacing is set to be 60KHz, and the cyclic prefix extension type is C3 type. In practical application, it can be known that, when the subcarrier interval is 60KHz, the duration of the 1 st symbol is 18.36 μ s in 14 symbols corresponding to 1 timeslot, and the duration of the remaining 13 symbols is 17.84 μ s.
Referring to fig. 4, a schematic diagram of cyclic prefix extension generation in the embodiment of the present invention is shown. Referring to fig. 5, a schematic diagram of another cyclic prefix extension generation in the embodiment of the present invention is shown.
In fig. 4, the cyclic prefix extension type is C3 type, and if the value of the C3 type carried in the configuration information is set to 2, the number of target symbols is determined to be 1. The target symbol is determined to be adjacent to and before a first gap symbol, the first gap symbol being the 11 th symbol in the slot 1, and the target symbol being the 10 th symbol in the slot 1. In the total duration corresponding to the 10 th symbol and the 11 th symbol in the timeslot 1, the duration of the first 16 μ s + TA is used for performing LBT and TA operations, and the remaining time and the cyclic prefix in the 12 th symbol (i.e., the symbol occupied by the 1 st PSFCH in the timing sequence) generate cyclic prefix extension.
In fig. 5, the cyclic prefix extension type is C3 type, and if the value of the C3 type carried in the configuration information is set to 2, the number of target symbols is determined to be 1. And determining that the target symbol is adjacent to and behind a first gap symbol, wherein the first gap symbol is the 11 th symbol in the slot 1, and the target symbol is the 12 th symbol in the slot 1. In the total duration corresponding to the 11 th symbol and the 12 th symbol in the timeslot 1, the duration of the first 16 μ s + TA is used for performing LBT and TA operations, and the remaining time and the cyclic prefix in the 13 th symbol (i.e., the symbol occupied by the 1 st PSFCH in timing) generate cyclic prefix extension.
Referring to fig. 6, a schematic diagram of cyclic prefix extension generation in the embodiment of the present invention is shown. Referring to fig. 7, a schematic diagram of another cyclic prefix extension generation in the embodiment of the present invention is shown.
In fig. 6, the cyclic prefix extension type is the type C3, and if the value of the type C3 carried in the configuration information is set to 2, the number of target symbols is determined to be 1. The target symbol is determined to be adjacent to and before a second slot symbol, which is the 14 th symbol in slot 1, and the target symbol is the 13 th symbol in slot 1. In the total time length corresponding to the 13 th symbol and the 14 th symbol in the timeslot 1, the time length of the first 16 μ s + TA is used for performing LBT and TA operations, and the remaining time and the cyclic prefix in the 1 st symbol in the timeslot 2 generate cyclic prefix extension.
In fig. 7, the cyclic prefix extension type is C3 type, and if the value of the C3 type carried in the configuration information is set to 2, the number of target symbols is determined to be 1. The target symbol is determined to be adjacent to and located after a second slot symbol, which is the 14 th symbol in slot 1, and the target symbol is the 1 st symbol in slot 2. In the total time length corresponding to the 14 th symbol in the timeslot 1 and the 1 st symbol in the timeslot 2, the time length of the first 16 μ s + TA is used for performing LBT and TA operations, and the remaining time and the cyclic prefix in the 2 nd symbol in the timeslot 2 generate cyclic prefix extension.
In the embodiment of the present invention, the positions of the target symbols selected by different time slots may be the same or different. Specifically, the scheme shown in fig. 4 may be combined with the scheme shown in fig. 6, that is, the scheme shown in fig. 4 is adopted in a part of the time slots, and the scheme shown in fig. 6 is adopted in another part of the time slots.
For example, in the slot 1, the selected target symbol is adjacent to and before the first gap symbol; in slot 2, the selected target symbol is adjacent to and located after the first gap symbol (the first gap symbol in slot 2).
In another embodiment of the present invention, the scheme shown in fig. 4 is combined with the scheme shown in fig. 7, that is, the scheme shown in fig. 4 is adopted in a part of time slots, and the scheme shown in fig. 7 is adopted in another part of time slots.
It should be noted that if the scheme shown in fig. 5 is combined with the scheme shown in fig. 6, both PSFCHs may be occupied, and therefore, the schemes shown in fig. 5 and fig. 6 should be avoided as much as possible in different time slots.
The subcarrier spacing is set to 60KHz, and the listen-before-talk duration is set to 25 mus.
Referring to fig. 8, a schematic diagram of cyclic prefix extension generation in the embodiment of the present invention is shown. Referring to fig. 9, a schematic diagram of another cyclic prefix extension generation in the embodiment of the present invention is shown.
In fig. 8, the cyclic prefix extension type is the type C2, and if the value of the type C2 carried in the configuration information is set to 2, the number of target symbols is determined to be 1. And determining that the target symbol is adjacent to and before a first gap symbol, wherein the first gap symbol is the 11 th symbol in the time slot 1, and the target symbol is the 10 th symbol in the time slot 1. In the total duration corresponding to the 10 th symbol and the 11 th symbol in the slot 1, the duration of the first 25 μ s is used for performing LBT, and the remaining time and the cyclic prefix in the 12 th symbol (i.e., the symbol occupied by the 1 st PSFCH in timing) generate cyclic prefix extension.
In fig. 9, the cyclic prefix extension type is C2 type, and if the value of the C2 type carried in the configuration information is set to 2, the number of target symbols is determined to be 1. And determining that the target symbol is adjacent to and behind a first gap symbol, wherein the first gap symbol is the 11 th symbol in the time slot 1, and the target symbol is the 12 th symbol in the time slot 1. In the total duration corresponding to the 11 th symbol and the 12 th symbol in the slot 1, the duration of the first 25 μ s is used for performing LBT, and the remaining time and the cyclic prefix in the 13 th symbol (i.e., the symbol occupied by the 1 st PSFCH in timing) generate cyclic prefix extension.
Referring to fig. 10, a schematic diagram of cyclic prefix extension generation in the embodiment of the present invention is shown. Referring to fig. 11, a schematic diagram of another cyclic prefix extension generation in the embodiment of the present invention is shown.
In fig. 10, the cyclic prefix extension type is C2 type, and if the value of the C2 type carried in the configuration information is set to 2, the number of target symbols is determined to be 1. The target symbol is determined to be adjacent to and before a second slot symbol, which is the 14 th symbol in slot 1, and the target symbol is the 13 th symbol in slot 1. In the total time length corresponding to the 13 th symbol and the 14 th symbol in the time slot 1, the first 25 μ s of time length is used for LBT, and the remaining time and the cyclic prefix in the 1 st symbol in the time slot 2 generate cyclic prefix extension.
In fig. 11, the cyclic prefix extension type is the type C2, and if the value of the type C2 carried in the configuration information is set to 2, the number of target symbols is determined to be 1. The target symbol is determined to be adjacent to and located after a second slot symbol, the second slot symbol being the 14 th symbol in slot 1, and the target symbol being the 1 st symbol in slot 2. Of the total duration corresponding to the 14 th symbol in slot 1 and the 1 st symbol in slot 2, the first 25 μ s duration is used for LBT, and the remaining time and the cyclic prefix in the 2 nd symbol in slot 2 generate cyclic prefix extension.
In the embodiment of the present invention, the positions of the target symbols selected by different time slots may be the same or different. Specifically, the scheme shown in fig. 8 may be combined with the scheme shown in fig. 10, that is, the scheme shown in fig. 8 is adopted in a part of the time slots, and the scheme shown in fig. 10 is adopted in another part of the time slots.
For example, in the slot 1, the selected target symbol is adjacent to and before the first gap symbol; in slot 2, the selected target symbol is adjacent to and located after the first gap symbol (the first gap symbol in slot 2).
In another embodiment of the present invention, the scheme shown in fig. 8 is combined with the scheme shown in fig. 11, that is, the scheme shown in fig. 8 is adopted in a part of time slots, and the scheme shown in fig. 11 is adopted in another part of time slots.
It should be noted that if the scheme shown in fig. 9 is combined with the scheme shown in fig. 10, both PSFCHs may be occupied, and therefore, the schemes shown in fig. 9 and 10 should be avoided as much as possible in different time slots.
In a specific implementation, when the value of Ci type indicated in the configuration information is 1, it means that no symbol for transmitting data information is occupied. Referring to fig. 12, a schematic diagram of cyclic prefix extension generation in the embodiment of the present invention is shown.
And determining that the number of the target symbols is 1, the cyclic prefix extension type is C1 type, the time slot 1 comprises symbols for bearing PSFCH, the subcarrier interval is 60KHz, and the time duration corresponding to one gap symbol is 17.84 mus. The first gap symbol (i.e., the 11 th symbol of slot 1) is selected for listen-before-talk, the duration required for listen-before-talk is 16 μ s, and the remaining 1.84 μ s and the cyclic prefix of the 12 th symbol are combined into a cyclic prefix extension.
Referring to fig. 13, a schematic diagram of cyclic prefix extension generation in an embodiment of the present invention is shown.
And determining that the number of the target symbols is 1, the cyclic prefix extension type is C1 type, the time slot 1 comprises symbols carrying PSFCH, the subcarrier interval is 60KHz, and the time duration corresponding to one gap symbol is 17.84 mu s. The second slot symbol (i.e., the 14 th symbol of slot 1) is selected for listen before talk, which requires 16 mus, and the remaining 1.84 mus and the cyclic prefix of the 1 st symbol of slot 2 are combined into a cyclic prefix extension.
In the above embodiment, an illustration of cyclic prefix extension generation when the cyclic prefix extension types are the type C2 and the type C3 is given. It can be understood that, for cyclic prefix extension types of C1 and C4, the generation of cyclic prefix extension may refer to the above-mentioned C2 type and C3 type, and details are not repeated in the embodiments of the present invention.
In particular, for the C1 type, reference may be made to the C2 type; for the C4 type, reference may be made to the C3 type.
The embodiment of the invention also provides an indication method for cyclic prefix extension generation, which comprises the following steps: generating configuration information; and issuing the configuration information to the user equipment.
In a specific implementation, the configuration information is used for indicating the number N of target symbols borrowed by the user equipment, where the target symbols are symbols used for transmitting data information; n is more than or equal to 1.
In a specific implementation, the indication method generated by cyclic prefix extension may be executed by a sending end device, or may be executed by a chip (e.g., a data signal processing chip) with data processing capability in the sending end device, or executed by a chip module including the chip with data processing capability in the sending end device. The sending end device may be a user equipment, and may be a base station device.
In particular implementations, the configuration information may be used to indicate the number of borrowing symbols, N. The configuration Information may be issued by the base station through a high-level signaling, may also be issued by Downlink Control Information (DCI), and may also be issued by other types of signaling such as MAC CE. The higher layer signaling may be Radio Resource Control (RRC) signaling.
In a specific implementation, specific contents and functions included in the configuration information may refer to the corresponding description in step S101, which is not described in detail in this embodiment of the present invention.
Referring to fig. 16, a cyclic prefix extension generating apparatus 160 in the embodiment of the present invention is provided, including: a receiving unit 161 and a first generating unit 162, wherein:
a receiving unit 161, configured to receive configuration information; the configuration information is used for indicating the number N of borrowed target symbols, and the target symbols are symbols used for transmitting data information; n is more than or equal to 1;
a first generating unit 162, configured to generate the cyclic prefix extension according to the configuration information.
In a specific implementation, the specific execution process of the receiving unit 161 and the first generating unit 162 may refer to the step S101 to the step S102, which is not described in detail in this embodiment of the present invention.
In a specific implementation, the cyclic prefix extension generating device 160 may correspond to a chip having a data processing function in the user equipment, such as a baseband chip; or to a chip module comprising a chip with data processing function in the user equipment, or to the user equipment.
An embodiment of the present invention further provides an apparatus for indicating cyclic prefix extension generation, including: a second generating unit and a transmitting unit, wherein: a second generating unit, configured to generate configuration information, where the configuration information is used to indicate a number N of target symbols borrowed by a user equipment, and the target symbols are symbols used for transmitting data information; n is more than or equal to 1; and the sending unit is used for sending the configuration information to the user equipment.
In a specific implementation, the indication apparatus generated by cyclic prefix extension may correspond to a chip having a data processing function in the sending end device, such as a digital signal processing chip, or correspond to a chip module including a data processing function chip in the sending end device, or correspond to the sending end device.
An embodiment of the present invention further provides a computer-readable storage medium, which is a non-volatile storage medium or a non-transitory storage medium, and on which a computer program is stored, where the computer program is executed by a processor to perform any of the steps of the cyclic prefix extension generation method described above, or to perform the step of the indication method of cyclic prefix extension generation described above.
The embodiment of the present invention further provides another cyclic prefix extension generating apparatus, including a memory and a processor, where the memory stores a computer program that can be executed on the processor, and the processor executes the steps of the cyclic prefix extension generating method in the foregoing embodiment when executing the computer program.
The embodiment of the present invention further provides an indication apparatus for cyclic prefix extension generation, which includes a memory and a processor, where the memory stores a computer program that can be run on the processor, and the processor executes the steps of the indication method for cyclic prefix extension generation described in the foregoing embodiment when running the computer program.
In a specific implementation, each module/unit included in each apparatus and product described in the foregoing embodiments may be a software module/unit, may also be a hardware module/unit, or may also be a part of a software module/unit and a part of a hardware module/unit.
For example, for each apparatus and product applied to or integrated into a chip, each module/unit included in the apparatus and product may all be implemented by hardware such as a circuit, or at least a part of the modules/units may be implemented by a software program running on a processor integrated within the chip, and the remaining (if any) part of the modules/units may be implemented by hardware such as a circuit; for each device or product applied to or integrated with the chip module, each module/unit included in the device or product may be implemented by using hardware such as a circuit, and different modules/units may be located in the same component (e.g., a chip, a circuit module, etc.) or different components of the chip module, or at least some of the modules/units may be implemented by using a software program running on a processor integrated within the chip module, and the rest (if any) of the modules/units may be implemented by using hardware such as a circuit; for each device and product applied to or integrated in the terminal, each module/unit included in the device and product may be implemented by using hardware such as a circuit, and different modules/units may be located in the same component (e.g., a chip, a circuit module, etc.) or different components in the terminal, or at least part of the modules/units may be implemented by using a software program running on a processor integrated in the terminal, and the rest (if any) part of the modules/units may be implemented by using hardware such as a circuit.
Those skilled in the art will appreciate that all or part of the steps in the methods of the above embodiments may be implemented by instructing the relevant hardware through a program, which may be stored in a computer-readable storage medium, and the storage medium may include: ROM, RAM, magnetic or optical disks, and the like.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (20)

1. A cyclic prefix extension generation method, comprising:
receiving configuration information; the configuration information is used for indicating the number N of borrowed target symbols, and the target symbols are symbols used for transmitting data information; n is more than or equal to 1;
and generating the cyclic prefix extension according to the configuration information.
2. The method for generating a cyclic prefix extension of claim 1, wherein said generating the cyclic prefix extension according to the configuration information comprises:
obtaining the number of gap symbols corresponding to 1 time slot;
and generating the cyclic prefix extension according to the configuration information, the cyclic prefix extension type and the number of the gap symbols.
3. The method for generating cyclic prefix extension according to claim 2, wherein said generating the cyclic prefix extension according to the configuration information, the type of cyclic prefix extension, and the number of gap symbols includes:
determining a borrowed target symbol according to the configuration information; the borrowed target symbol is adjacent to the gap symbol;
determining the duration of listening before speaking according to the cyclic prefix extension type;
and in the total time length corresponding to the gap symbol and the target symbol, removing the time length for listening before speaking, and combining the residual time length with the cyclic prefix in the next symbol for transmitting data information to generate the cyclic prefix extension.
4. The cyclic prefix extension generating method of claim 3, wherein the number of gap symbols corresponding to a current slot is 1.
5. The cyclic prefix extension generating method of claim 4, wherein the gap symbol is located at a last symbol of a current slot; generating the cyclic prefix extension according to the configuration information, the cyclic prefix extension type and the number of the gap symbols includes:
determining the target symbols as N symbols adjacent to the gap symbols in the current time slot according to the configuration information;
determining the duration of listening before speaking according to the cyclic prefix extension type;
removing the duration for listening before speaking from the total duration corresponding to the gap symbol and the target symbol, and combining the remaining duration with the cyclic prefix of the first symbol in the next time slot to generate the cyclic prefix extension; the next time slot is adjacent to the current time slot.
6. The cyclic prefix extension generating method of claim 4, wherein the gap symbol is located at a last symbol of a current slot; generating the cyclic prefix extension according to the configuration information, the cyclic prefix extension type and the number of the gap symbols includes:
determining the target symbol as N symbols adjacent to the gap symbol in the next time slot according to the configuration information; the next time slot is adjacent to the current time slot;
determining the duration of listening before speaking according to the cyclic prefix extension type;
and removing the duration of listening before speaking from the total duration corresponding to the gap symbol and the target symbol, and combining the remaining duration with the cyclic prefix of the (N + 1) th symbol in the next time slot to generate the cyclic prefix extension.
7. The cyclic prefix extension generating method of claim 3, wherein a gap symbol corresponding to a current slot includes a first gap symbol and a second gap symbol, and the first gap symbol is located before the second gap symbol in terms of time sequence.
8. The method for generating cyclic prefix extension according to claim 7, wherein said generating the cyclic prefix extension according to the configuration information, the type of cyclic prefix extension, and the number of gap symbols includes:
according to the configuration information, determining the target symbols as N symbols which are adjacent to a first gap symbol and are positioned before the first gap symbol in the current time slot;
determining the duration of listening before speaking according to the cyclic prefix extension type;
and in the total time length corresponding to the first gap symbol and the target symbol, removing the time length for listening before speaking, and combining the residual time length with the cyclic prefix of the first symbol after the first gap symbol to generate the cyclic prefix extension.
9. The method for generating a cyclic prefix extension according to claim 7, wherein the generating the cyclic prefix extension based on the configuration information, a type of the cyclic prefix extension, and the number of gap symbols includes:
determining the target symbols as N symbols which are adjacent to and behind a first gap symbol in the current time slot according to the configuration information;
determining the duration of listening before speaking according to the cyclic prefix extension type;
and in the total time length corresponding to the first gap symbol and the target symbol, removing the time length for listening and speaking before, and combining the residual time length with the cyclic prefix of the (N + 1) th symbol after the first gap symbol to generate the cyclic prefix extension.
10. The method for generating cyclic prefix extension according to claim 7, wherein said generating the cyclic prefix extension according to the configuration information, the type of cyclic prefix extension, and the number of gap symbols includes:
determining the target symbols as N symbols which are adjacent to the first gap symbol and are positioned before the second gap symbol in the current time slot according to the configuration information;
determining the duration of listening before speaking according to the cyclic prefix extension type;
and in the total time length corresponding to the second gap symbol and the target symbol, removing the time length for listening before speaking, and combining the residual time length with the cyclic prefix of the first symbol after the second gap symbol to generate the cyclic prefix extension.
11. The method of claim 10, wherein if the second slot symbol is a last symbol in the current slot, a first symbol after the second slot symbol is a 1 st symbol of a next slot, and the next slot is adjacent to the current slot.
12. The method for generating cyclic prefix extension according to claim 7, wherein said generating the cyclic prefix extension according to the configuration information, the type of cyclic prefix extension, and the number of gap symbols includes:
determining the target symbols as N symbols which are adjacent to the first gap symbol and are positioned after the second gap symbol in the current time slot according to the configuration information;
determining the duration of listening before speaking according to the cyclic prefix extension type;
and in the total time length corresponding to the second gap symbol and the target symbol, removing the time length for listening and then speaking, and combining the residual time length with the cyclic prefix of the (N + 1) th symbol after the second gap symbol to generate the cyclic prefix extension.
13. The method for generating cyclic prefix extension of claim 12, wherein if the second slot symbol is a last symbol in the current slot, N symbols after the second slot symbol are first N symbols of a next slot, and an N +1 th symbol after the second slot symbol is an N +1 th symbol of the next slot; the next time slot is adjacent to the current time slot.
14. The cyclic prefix extension generation method of claim 1, wherein the receiving configuration information includes any one of:
receiving downlink control information, and acquiring the configuration information from the downlink control information;
and receiving a high-level signaling, and acquiring the configuration information from the high-level signaling.
15. A method for indicating cyclic prefix extension generation, comprising:
generating configuration information, wherein the configuration information is used for indicating the number N of target symbols borrowed by user equipment, and the target symbols are symbols used for transmitting data information; n is more than or equal to 1;
and issuing the configuration information to the user equipment.
16. An apparatus for generating a cyclic prefix extension, comprising:
a receiving unit for receiving configuration information; the configuration information is used for indicating the number N of borrowed target symbols, and the target symbols are symbols used for transmitting data information; n is more than or equal to 1;
a first generating unit, configured to generate the cyclic prefix extension according to the configuration information.
17. An apparatus for indicating cyclic prefix extension generation, comprising:
a second generating unit, configured to generate configuration information, where the configuration information is used to indicate a number N of target symbols borrowed by a user equipment, and the target symbols are symbols used for transmitting data information; n is more than or equal to 1;
and the sending unit is used for sending the configuration information to the user equipment.
18. A computer-readable storage medium, being a non-volatile storage medium or a non-transitory storage medium, having stored thereon a computer program, wherein the computer program, when being executed by a processor, is configured to perform the steps of the cyclic prefix extension generation method according to any one of claims 1 to 14, or the steps of the indication method of cyclic prefix extension generation according to claim 15.
19. A cyclic prefix extension generation apparatus comprising a memory and a processor, the memory having stored thereon a computer program operable on the processor, wherein the processor executes the computer program to perform the steps of the cyclic prefix extension generation method of any one of claims 1 to 14.
20. An apparatus for indicating cyclic prefix extension generation, comprising a memory and a processor, the memory having stored thereon a computer program operable on the processor, wherein the processor executes the computer program to perform the steps of the method for indicating cyclic prefix extension generation of claim 15.
CN202110182699.8A 2021-02-08 2021-02-08 Cyclic prefix extension generation and indication method, device and readable storage medium Pending CN114915390A (en)

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