CN107896390B - Method and device for low-delay UE and base station - Google Patents
Method and device for low-delay UE and base station Download PDFInfo
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- CN107896390B CN107896390B CN201610878214.8A CN201610878214A CN107896390B CN 107896390 B CN107896390 B CN 107896390B CN 201610878214 A CN201610878214 A CN 201610878214A CN 107896390 B CN107896390 B CN 107896390B
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- 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
- H04W72/0446—Resources in time domain, e.g. slots or frames
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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]
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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
Abstract
The invention discloses a method and a device for low-delay UE and a base station. As an embodiment, a UE first receives a first wireless signal in a first time window; the second wireless signal is then transmitted in a second time window. And the time domain resource occupied by the first wireless signal belongs to a third time window, and the ending time of the third time window is later than the starting time of the second time window. The second wireless signal is used to determine at least one of { the first wireless signal is correctly decoded, the first wireless signal is not correctly decoded, an expiration of the third time window }. The invention ensures low delay and robustness and improves transmission efficiency.
Description
Technical Field
The present invention relates to a transmission scheme of wireless signals in a wireless communication system, and more particularly, to a method and apparatus for low-delay communication.
Background
For a conventional HARQ (Hybrid Automatic Repeat reQuest), when decoding fails, a receiver stores received data and requests a sender to retransmit the data, and the receiver combines the retransmitted data with previously received data and then decodes the data.
The conventional HARQ technique can effectively reduce BLER (BLock Error Rate), but RTT (round trip Time) will cause an increase in transmission delay. For services with high delay and Robustness (Robustness) requirements, such as URLLC (Ultra Reliable Low delay Communication) established by 3GPP (3rd Generation Partner Project), the conventional HARQ may no longer be applicable.
Disclosure of Invention
To ensure both low delay and robustness, an intuitive solution is to reduce the modulation/coding efficiency while reducing (or even eliminating) the number of HARQ retransmissions. However, the above-described intuitive method will seriously reduce the transmission efficiency.
The present invention provides a solution to the above problems. It should be noted that the embodiments and features of the embodiments of the present application may be arbitrarily combined with each other without conflict. For example, embodiments and features in embodiments in the UE of the present application may be applied in a base station and vice versa.
The invention discloses a method used in a low-delay UE (User Equipment), which comprises the following steps:
-a. processing a first wireless signal in a target time window;
-step b. operating the second radio signal in a second time window.
Wherein the processing is receiving and the operation is transmitting, the target time window is a first time window; or the processing is transmitting and the operation is receiving, the target time window being a third time window. And the time domain resource occupied by the first wireless signal belongs to a third time window, and the ending time of the third time window is later than the starting time of the second time window. The second wireless signal is used to determine at least one of { the first wireless signal is correctly decoded, the first wireless signal is not correctly decoded, an expiration of the third time window }.
Unlike conventional HARQ, the UE transmits the second radio signal before the first radio signal is completely received (before the expiration of the third time window); or the UE receives the second wireless signal before completely transmitting the first wireless signal.
As an embodiment, the above method reduces transmission delay on one hand; on the other hand, the sender of the first wireless signal can terminate sending as early as possible, and further transmission efficiency is improved.
As an embodiment, the second wireless signal indicates that the first wireless signal is correctly decoded, the second wireless signal being used to determine the expiration of the third time window.
As an embodiment, the second wireless signal is independent of a portion of the first wireless signal outside of the first time window.
As one embodiment, the second wireless signal is determined from a portion of the first wireless signal in the first time window.
As an embodiment, the start time of the second time window is later than the end time of the first time window.
As an embodiment, the start time of the third time window is equal to the start time of the first time window, and the end time of the third time window is later than the end time of the first time window.
As an embodiment, the first wireless signal occupies each multicarrier symbol in the third time window. As a sub-embodiment, the multi-carrier symbol is an OFDM (Orthogonal Frequency division multiplexing) symbol. As a sub-embodiment, the multicarrier symbols are SC-FDMA symbols. As a sub-embodiment, the multi-Carrier symbol is an FBMC (Filter Bank Multiple Carrier) symbol.
As one embodiment, the first wireless signal carries physical layer data.
As an embodiment, the processing is receiving, and a transmission CHannel corresponding to the first wireless signal is a DL-SCH (DownLink Shared CHannel).
As an embodiment, the processing is sending, and a transmission CHannel corresponding to the first wireless signal is UL-SCH (UpLink Shared CHannel).
As an embodiment, the second radio signal is used for determining an end time of the third time window, the end time of the third time window being subsequent to the end time of the second time window.
As an embodiment, the second radio signal is transmitted on a physical layer control channel (i.e. a physical layer channel which can only be used for transmitting physical layer control signaling).
As a sub-embodiment of the foregoing embodiment, the processing is receiving, and the Physical layer Control CHannel includes at least one of { PUCCH (Physical Uplink Control CHannel ) } and sPUCCH (short PUCCH).
As a sub-embodiment of the foregoing embodiment, the processing is sending, and the Physical layer control CHannel includes at least one of { PDCCH (Physical downlink control CHannel ) } sPDCCH (short PDCCH, short PDCCH), ePDCCH (enhanced PDCCH).
In one embodiment, the second wireless signal is modulated according to a signature sequence, and the signature sequence includes at least one of { Zadoff-Chu sequence, pseudo-random sequence }.
As a sub-embodiment of the above embodiment, a time interval between an expiration of the third time window to an expiration of the second time window is determined by a sender of the first wireless signal.
As a sub-embodiment of the above embodiment, a time interval between an expiration time of the third time window to an expiration time of the second time window is configurable.
As a sub-embodiment of the above embodiment, the time interval between the expiration of the third time window and the expiration of the second time window is default.
In one embodiment, the first wireless signal is transmitted on a first carrier and the second wireless signal is transmitted on a second carrier.
As a sub-embodiment of the foregoing embodiment, the processing is receiving, and the first carrier and the second carrier are a downlink carrier and an uplink carrier of FDD (Frequency Division Duplex), respectively.
As a sub-embodiment of the foregoing embodiment, the processing is sending, and the first carrier and the second carrier are an FDD uplink carrier and an FDD downlink carrier, respectively.
As a sub-embodiment of the above embodiment, the first carrier and the second carrier belong to an Unlicensed Spectrum (Unlicensed Spectrum) and a Licensed Spectrum (Licensed Spectrum), respectively.
As an example, the second wireless signal is transmitted only if the first wireless signal is decoded correctly.
Specifically, according to an aspect of the present invention, the step a further includes the steps of:
step A0. receives the third wireless signal.
Wherein the third wireless signal is used to determine a first resource pool comprising G1 time-frequency resource blocks comprising a plurality of RUs occupying one subcarrier in the frequency domain and one multicarrier symbol duration in the time domain. The second wireless signal occupies G2 time-frequency resource blocks in the first resource pool. The G1 is a positive integer, the G2 is a positive integer less than or equal to the G1.
As an example, the duration of the multicarrier symbol (in seconds) is equal to the inverse of the spacing of the subcarriers (in hertz).
As an embodiment, the processing is receiving, and the first resource pool is reserved for a PUCCH (physical uplink Control CHannel) or a sPUCCH (short PUCCH).
As an embodiment, the processing is sending, and the first resource pool is reserved for ePDCCH (enhanced physical downlink Control CHannel).
As one example, the G1 is greater than 1 and the G2 is 1.
As an embodiment, any two of the G1 time-frequency resource blocks are orthogonal (i.e. non-overlapping) in the time domain.
As an embodiment, the RUs in the time-frequency resource block are contiguous in the frequency domain.
As an embodiment, the RUs in the time-frequency resource block are contiguous in time domain.
As an embodiment, the third wireless signal carries high Layer (Higher Layer) signaling.
As an embodiment, the third Radio signal carries one or more RRC (Radio resource control) IEs (Information elements).
As an example, the third wireless signal is transmitted on a physical layer data channel (i.e., a physical layer channel that can be used to transmit physical layer data).
As a sub-embodiment of the foregoing embodiment, the Physical layer data CHannel includes at least one of { PDSCH (Physical downlink Shared CHannel), sPDSCH (short PDSCH), PUSCH (Physical Uplink Shared CHannel) }.
Specifically, according to an aspect of the present invention, the step a further includes the steps of:
-a step a1. receiving a fourth radio signal.
Wherein the fourth radio signal is used to determine at least one of { a first time length, a frequency domain resource occupied by the first radio signal }, and a duration of the third time window does not exceed the first time length.
As an embodiment, the second wireless signal indicates that the first wireless signal is correctly decoded, and the sender of the first wireless signal stops sending the first wireless signal even if the duration of the third time window is less than the first time length.
As one embodiment, the second wireless signal indicates that the first wireless signal was incorrectly decoded, and the sender of the first wireless signal continues to send the first wireless signal.
In the above two embodiments, the sender of the first wireless signal determines the sending time of the first wireless signal according to the second wireless signal, so that on one hand, robustness is ensured, and on the other hand, serious reduction of transmission efficiency is avoided.
As one embodiment, the first length of time is a maximum duration of the first wireless signal in a time domain.
As an embodiment, the fourth wireless signal carries higher layer signaling.
As an embodiment, the fourth wireless signal carries physical layer signaling.
For one embodiment, the fourth wireless signal is transmitted on a physical layer data channel.
As a sub-embodiment of the above embodiment, the physical layer data channel comprises at least one of { PDSCH, sPDSCH, PUSCH }.
As one embodiment, a first sequence is used to generate the fourth wireless signal, the first sequence being one of Q1 candidate sequences, the Q1 being a positive integer greater than 1.
As a sub-embodiment of the above embodiment, the candidate sequence is a pseudo-random sequence or a Zadoff-Chu sequence.
As a sub-implementation of the above embodiment, the index of the first sequence in the Q1 candidate sequences is used to determine at least one of { first time length, size of frequency domain resource occupied by the first wireless signal }.
As a sub-embodiment of the foregoing embodiment, the time domain resource occupied by the fourth radio is used to determine a starting time of the time domain resource occupied by the first radio signal or a starting time of the first time window.
As a sub-embodiment of the foregoing embodiment, the fourth wireless signal is an output of the first sequence after sequentially passing through a Modulation Mapper (Modulation Mapper), a Layer Mapper (Layer Mapper), a Precoding (Precoding), a Resource Element Mapper (Resource Element Mapper), and an OFDM signal Generation (Generation).
Specifically, according to one aspect of the present invention, the method further comprises the following steps:
-step c. processing the fifth radio signal in a fourth time window.
Wherein the second wireless signal indicates that the first wireless signal is correctly decoded. The time interval between the starting time of the fourth time window and the starting time of the first time window is less than the first time length. The frequency domain resources occupied by the fifth wireless signal overlap with the frequency domain resources occupied by the first wireless signal.
As an embodiment, the sender of the first wireless signal sends the fifth wireless signal by using the saved time domain resource, that is, the time domain resource between the ending time of the third time window and the target time, so that the transmission efficiency is improved. The target time is after the starting time of the third time window and the time interval between the target time and the starting time of the third time window is a first time length.
As an embodiment, the starting time of the fourth time window is after the ending time of the second time window.
As an embodiment, the end time of the third time window is before the start time of the fourth time window.
As a sub-embodiment of the above embodiment, a time interval between an end time of the third time window and a start time of the fourth time window does not exceed a duration of one multicarrier symbol. The start time of the fourth time window is the start time of one multicarrier symbol.
As a sub-embodiment of the above embodiment, a Time Interval between an end Time of the third Time window and a start Time of the fourth Time window does not exceed a duration of one TTI (transmission Time Interval). The start time of the fourth time window is the start time of a physical layer data channel.
As a sub-embodiment of the above embodiment, a time interval between an end time of the third time window and a start time of the fourth time window does not exceed a duration of one sTTI (short TTI). The start time of the fourth time window is the start time of a physical layer data channel.
As an embodiment, a first block of bits is used for generating the first wireless signal and a second block of bits is used for generating the fifth wireless signal.
As a sub-embodiment of the above embodiment, the first bit Block and the second bit Block each include a positive integer number of TBs (Transport blocks).
As a sub-embodiment of this embodiment, the first radio signal is an output of the first bit block after sequentially performing Channel Coding (Channel Coding), Modulation Mapper (Modulation Mapper), Layer Mapper (Layer Mapper), Precoding (Precoding), Resource Element Mapper (Resource Element Mapper), and OFDM signal Generation (Generation). The second wireless signal is output after the second bit block is subjected to channel coding, a modulation mapper, a layer mapper, precoding, a resource element mapper and OFDM signal generation in sequence.
As one embodiment, the first wireless signal and the fifth wireless signal are transmitted on a same physical layer channel. As a sub-embodiment, the processing is receiving and the same physical layer channel is PDSCH or sPDSCH. As yet another sub-embodiment, the processing is transmitting and the same physical layer channel is PUSCH or sPUSCH.
As an embodiment, the first wireless signal and the fifth wireless signal correspond to a same transmission channel. As a sub-embodiment, the processing is reception and the same transport channel is DL-SCH. As yet another sub-embodiment, the processing is transmitting and the same transport channel is UL-SCH.
As an embodiment, the fifth wireless signal is used for at least one of { synchronization, channel measurement, channel estimation }.
As a sub-embodiment of the above-described embodiment, the fifth wireless Signal includes an RS (Reference Signal).
Specifically, according to one aspect of the present invention, the method further comprises the following steps:
step C0. processes the sixth wireless signal in a fifth time window.
Wherein a start time of the fifth time window is subsequent to an end time of the second time window, the sixth wireless signal being used to determine at least one of { the end time of the third time window, the start time of the fourth time window }.
As an embodiment, the starting time of the fifth time window is after the starting time of the fourth time window.
As an embodiment, the sixth wireless signal is used to determine a Transport Block Size (TBS) corresponding to the fifth wireless signal.
As an embodiment, the sixth wireless signal is transmitted on a physical layer control channel.
As an embodiment, the sixth radio signal is cell common.
As an embodiment, the sixth radio signal is UE-specific, or UE group-specific.
As an embodiment, the second sequence is used to generate the sixth wireless signal.
As a sub-embodiment of the above embodiment, the second sequence is one of Q2 candidate sequences, and Q2 is a positive integer greater than 1. The index of the second sequence in the Q2 candidate sequences indicates at least one of { an end time of the third time window, a start time of the fourth time window }.
As a sub-embodiment of the foregoing embodiment, the ending time of the third time window is associated with the time domain resource occupied by the second sequence.
As a sub-embodiment of the foregoing embodiment, a deadline of the fourth time window is associated with a time domain resource occupied by the second sequence.
As an embodiment, the start time of the fifth time window is after the end time of the second time window.
Specifically, according to an aspect of the present invention, the step B further includes the steps of:
-step b1. operating the seventh radio signal in a sixth time window.
Wherein the seventh wireless signal indicates that the first wireless signal is not correctly decoded and the second wireless signal indicates that the first wireless signal is correctly decoded. The sixth time window precedes the second time window.
As an embodiment, the seventh wireless signal occupies G3 time-frequency resource blocks in the first resource pool. The G3 is a positive integer less than the G1.
As an embodiment, the start time of the third time window is earlier than the start time of the sixth time window.
The invention discloses a method used in a low-delay base station, which comprises the following steps:
-a. operating a first wireless signal in a target time window;
-step b. processing the second radio signal in a second time window.
Wherein the operation is a transmission and the processing is a reception, the target time window is a third time window; or the operation is reception and the processing is transmission, the target time window being a first time window. And the time domain resource occupied by the first wireless signal belongs to a third time window, and the ending time of the third time window is later than the starting time of the second time window. The second wireless signal is used to determine at least one of { the first wireless signal is correctly decoded, the first wireless signal is not correctly decoded, an expiration of the third time window }.
As one embodiment, the second wireless signal is used to determine whether the first wireless signal is decoded correctly.
Specifically, according to an aspect of the present invention, the step a further includes the steps of:
step A0. sends a third wireless signal.
Wherein the third wireless signal is used to determine a first resource pool comprising G1 time-frequency resource blocks comprising a plurality of RUs occupying one subcarrier in the frequency domain and one multicarrier symbol duration in the time domain. The second wireless signal occupies G2 time-frequency resource blocks in the first resource pool. The G1 is a positive integer, the G2 is a positive integer less than or equal to the G1.
Specifically, according to an aspect of the present invention, the step a further includes the steps of:
-a step a1. transmitting a fourth radio signal.
Wherein the fourth radio signal is used to determine at least one of { a first time length, a frequency domain resource occupied by the first radio signal }, and a duration of the third time window does not exceed the first time length.
As an embodiment, the second wireless signal indicates that the first wireless signal is correctly decoded, and the base station stops transmitting the first wireless signal even if the duration of the third time window is less than the first time length.
As one embodiment, the second wireless signal indicates that the first wireless signal is incorrectly decoded, the base station continues to transmit the first wireless signal until the duration of the third time window is equal to the first length of time.
Specifically, according to one aspect of the present invention, the method further comprises the following steps:
-step c. operating the fifth radio signal in a fourth time window.
Wherein the second wireless signal indicates that the first wireless signal is correctly decoded. The time interval between the starting time of the fourth time window and the starting time of the first time window is less than the first time length. The frequency domain resources occupied by the fifth wireless signal overlap with the frequency domain resources occupied by the first wireless signal.
Specifically, according to one aspect of the present invention, the method further comprises the following steps:
step C0. operates the sixth wireless signal in a fifth time window.
Wherein a start time of the fifth time window is subsequent to an end time of the second time window, the sixth wireless signal being used to determine at least one of { the end time of the third time window, the start time of the fourth time window }.
Specifically, according to an aspect of the present invention, the step B further includes the steps of:
-step b1. processing the seventh radio signal in a sixth time window.
Wherein the seventh wireless signal indicates that the first wireless signal is not correctly decoded and the second wireless signal indicates that the first wireless signal is correctly decoded. The sixth time window precedes the second time window.
The invention discloses a user equipment supporting low delay, which comprises the following modules:
a first module: for processing the first wireless signal in a target time window;
a second module: for operating on the second wireless signal in a second time window.
Wherein the processing is receiving and the operation is transmitting, the target time window is a first time window; or the processing is transmitting and the operation is receiving, the target time window being a third time window. And the time domain resource occupied by the first wireless signal belongs to a third time window, and the ending time of the third time window is later than the starting time of the second time window. The second wireless signal is used to determine at least one of { the first wireless signal is correctly decoded, the first wireless signal is not correctly decoded, an expiration of the third time window }.
As an embodiment, the above user equipment is characterized in that the first module is further configured to receive a third wireless signal. Wherein the third wireless signal is used to determine a first resource pool comprising G1 time-frequency resource blocks comprising a plurality of RUs occupying one subcarrier in the frequency domain and one multicarrier symbol duration in the time domain. The second wireless signal occupies G2 time-frequency resource blocks in the first resource pool. The G1 is a positive integer, the G2 is a positive integer less than or equal to the G1.
As an embodiment, the above user equipment is characterized in that the first module is further configured to receive a fourth wireless signal. Wherein the fourth radio signal is used to determine at least one of { a first time length, a frequency domain resource occupied by the first radio signal }, and a duration of the third time window does not exceed the first time length.
As an embodiment, the user equipment as described above is characterized in that the second module is further configured to operate the seventh radio signal in a sixth time window. Wherein the seventh wireless signal indicates that the first wireless signal is not correctly decoded and the second wireless signal indicates that the first wireless signal is correctly decoded. The sixth time window precedes the second time window.
As an embodiment, the above user equipment is characterized in that the first module is further configured to { process the fifth wireless signal in the fourth time window, and process the sixth wireless signal in the fifth time window }.
Wherein the second wireless signal indicates that the first wireless signal is correctly decoded. The time interval between the starting time of the fourth time window and the starting time of the first time window is less than the first time length. The frequency domain resources occupied by the fifth wireless signal overlap with the frequency domain resources occupied by the first wireless signal. The start time of the fifth time window is after the end time of the second time window, and the sixth wireless signal is used to determine at least one of { the end time of the third time window, the start time of the fourth time window }.
The invention discloses a base station device supporting low delay, which comprises the following modules:
a third module: for operating the first wireless signal in a target time window;
a fourth module: for processing the second wireless signal in a second time window.
Wherein the operation is a transmission and the processing is a reception, the target time window is a third time window; or the operation is reception and the processing is transmission, the target time window being a first time window. And the time domain resource occupied by the first wireless signal belongs to a third time window, and the ending time of the third time window is later than the starting time of the second time window. The second wireless signal is used to determine at least one of { the first wireless signal is correctly decoded, the first wireless signal is not correctly decoded, an expiration of the third time window }.
As an embodiment, the base station device is characterized in that the third module is further configured to transmit a third wireless signal. Wherein the third wireless signal is used to determine a first resource pool comprising G1 time-frequency resource blocks comprising a plurality of RUs occupying one subcarrier in the frequency domain and one multicarrier symbol duration in the time domain. The second wireless signal occupies G2 time-frequency resource blocks in the first resource pool. The G1 is a positive integer, the G2 is a positive integer less than or equal to the G1.
As an embodiment, the base station device is characterized in that the third module is further configured to transmit a fourth wireless signal. Wherein the fourth radio signal is used to determine at least one of { a first time length, a frequency domain resource occupied by the first radio signal }, and a duration of the third time window does not exceed the first time length.
As an embodiment, the base station device is characterized in that the fourth module is further configured to process a seventh wireless signal in a sixth time window. Wherein the seventh wireless signal indicates that the first wireless signal is not correctly decoded and the second wireless signal indicates that the first wireless signal is correctly decoded. The sixth time window precedes the second time window.
As an embodiment, the base station device as described above is characterized in that the third module is further configured to { at least one of operate the fifth wireless signal in the fourth time window and operate the sixth wireless signal in the fifth time window }.
Wherein the second wireless signal indicates that the first wireless signal is correctly decoded. The time interval between the starting time of the fourth time window and the starting time of the first time window is less than the first time length. The frequency domain resources occupied by the fifth wireless signal overlap with the frequency domain resources occupied by the first wireless signal. The start time of the fifth time window is after the end time of the second time window, and the sixth wireless signal is used to determine at least one of { the end time of the third time window, the start time of the fourth time window }.
Compared with the prior art, the scheme disclosed by the invention has the following advantages:
reduced transmission delay. As long as the maximum time length (first time length) is not reached, the transmitter can continue to transmit data to ensure that the receiver decodes correctly as early as possible.
Improved robustness. The design of the first time length can ensure a sufficiently low BLER.
Improved transmission efficiency. The receiver, upon correct decoding, uses the second wireless signal to inform the transmitter to stop transmitting. The transmitter can transmit other wireless signals using the saved time domain resources.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:
fig. 1 shows a flow diagram where a first wireless signal is a downlink signal according to one embodiment of the invention;
fig. 2 shows a flow diagram where the first wireless signal is an uplink signal according to one embodiment of the invention;
FIG. 3 shows a schematic diagram of a plurality of time windows according to an embodiment of the invention;
FIG. 4 shows a schematic diagram of a fourth time window and a fifth time window according to an embodiment of the invention;
FIG. 5 shows a schematic illustration of a plurality of time windows according to a further embodiment of the invention;
FIG. 6 shows a schematic diagram of a second wireless signal according to an embodiment of the invention;
fig. 7 shows a flow diagram of a first wireless signal transmission according to an embodiment of the invention;
fig. 8 shows a block diagram of a processing apparatus in a UE for receiving data according to an embodiment of the present invention;
fig. 9 is a block diagram showing a configuration of a processing apparatus for transmitting data in a base station according to an embodiment of the present invention;
fig. 10 shows a block diagram of a processing apparatus for transmitting data in a UE according to an embodiment of the present invention;
fig. 11 shows a block diagram of a processing device for receiving data in a base station according to an embodiment of the present invention;
Detailed Description
The technical solutions of the present invention will be further described in detail with reference to the accompanying drawings, and it should be noted that the features of the embodiments and examples of the present application may be arbitrarily combined with each other without conflict.
Example 1
Embodiment 1 illustrates a flowchart in which the first wireless signal is a downlink signal, as shown in fig. 1. In fig. 1, a base station N1 is a maintenance base station of a serving cell of the UE U2, and the steps in block F0 and the steps in block F1 are optional, respectively.
For theBase station N1Transmitting a fourth wireless signal in step S10; transmitting a third wireless signal in step S11; transmitting the first wireless signal in a third time window in step S12; the second wireless signal is received in a second time window in step S13.
For theUE U2Receiving a fourth wireless signal in step S20; receiving a third wireless signal in step S21; receiving a first wireless signal in a first time window in step S22; in step S23, a second wireless signal is transmitted in a second time window.
In embodiment 1, the time domain resource occupied by the first wireless signal belongs to a third time window, and the ending time of the third time window is later than the starting time of the second time window. The second wireless signal is used by base station N1 to determine at least one of { the first wireless signal is correctly decoded, the first wireless signal is not correctly decoded, an expiration of the third time window }. The third wireless signal is used to determine a first resource pool comprising G1 time-frequency resource blocks comprising a plurality of RUs occupying one subcarrier in the frequency domain and one multicarrier symbol duration in the time domain. The second wireless signal occupies G2 time-frequency resource blocks in the first resource pool. The G1 is a positive integer, the G2 is a positive integer less than or equal to the G1. The fourth radio signal is used to determine at least one of { a first time length, a frequency domain resource occupied by the first radio signal }, and a duration of the third time window does not exceed the first time length.
As sub-embodiment 1 of embodiment 1, the spacing of the subcarriers is one of {3.75kHz, 7.5kHz, 15kHz, 30kHz, 60kHz, 120kHz, 240kHz, 480kHz }.
As a sub-embodiment 2 of embodiment 1, the first wireless signal is transmitted on a physical layer data channel and the second wireless signal is transmitted on a physical layer control channel.
As sub-embodiment 3 of embodiment 1, the third wireless signal is transmitted on a physical layer data channel and the fourth wireless signal is transmitted on a physical layer data channel.
As a sub-embodiment 4 of embodiment 1, for any one RU of the given time-frequency resource blocks, there is at least one given RU of the given time-frequency resource blocks, and the given RU and the any one RU are consecutive in a time domain or a frequency domain.
As sub-embodiment 5 of embodiment 1, the first wireless signal occupies a plurality of RUs, at least two of which correspond to different subcarrier spacings.
Example 2
Embodiment 2 illustrates a flowchart in which the first wireless signal is an uplink signal, as shown in fig. 2. In fig. 2, base station N3 is the serving cell maintaining base station for UE U4.
For theBase station N3Receiving a first wireless signal in a first time window in step S31; in step S32, a second wireless signal is transmitted in a second time window.
For theUE U4Transmitting the first wireless signal in a third time window in step S41; the second wireless signal is received in a second time window in step S42.
In embodiment 2, the second radio signal is used by the UE U4 to determine the expiration of the third time window.
As sub-embodiment 1 of embodiment 2, the first wireless signal is transmitted on a physical layer data channel and the second wireless signal is transmitted on a physical layer control channel.
As a sub-embodiment 2 of the embodiment 2, the second radio signal is transmitted by the base station N3 only if the first radio signal is correctly decoded. I.e. the second wireless signal indicates that the first wireless signal is correctly decoded.
As sub-embodiment 3 of embodiment 2, the second wireless signal indicates whether the first wireless signal is correctly decoded.
As sub-embodiment 4 of embodiment 2, the second wireless signal is generated according to a signature sequence.
Example 3
Example 3 illustrates a schematic diagram of a plurality of time windows, as shown in fig. 3.
In embodiment 3, the transmitter starts to transmit the first wireless signal at the start time of the first time window (i.e., the start time of the third time window); a receiver correctly decodes the first wireless signal received in the first time window; the receiver transmits a second wireless signal in a second time window, the second wireless signal indicating that the first wireless signal is correctly decoded; the transmitter stops transmitting the first wireless signal (at the expiration of a third time window) after receiving the second wireless signal; the transmitter transmits a fifth wireless signal in a fourth time window.
In embodiment 3, a first time interval is between an end time of the first time window and a start time of the second time window, and the receiver decodes the first wireless signal in the first time window in the first time interval.
As a sub-embodiment 1 of embodiment 3, a time interval between an end time of the third time window and a start time of the fourth time window does not exceed a duration of one multicarrier symbol. The start time of the fourth time window is the start time of one multicarrier symbol.
As a sub-embodiment 2 of embodiment 3, a Time Interval between an end Time of the third Time window and a start Time of the fourth Time window does not exceed a duration of one TTI (transmission Time Interval). The start time of the fourth time window is the start time of a physical layer data channel.
As a sub-embodiment 3 of embodiment 3, a time interval between an end time of the third time window and a start time of the fourth time window does not exceed a duration of one sTTI (short TTI). The start time of the fourth time window is the start time of a physical layer data channel.
As a sub-embodiment 4 of embodiment 3, fig. 3 does not consider the Propagation Delay (Propagation Delay) from the transmitter to the receiver.
As a sub-embodiment 5 of embodiment 3, a time interval of a start time of the fourth time window from a start time of the first time window is less than the first time length, and the first time length is configurable. The fifth wireless signal and the first wireless signal share at least one subcarrier.
Example 4
Example 4 illustrates a schematic diagram of the fourth time window and the fifth time window, as shown in fig. 4. In fig. 4, the start of the fifth time window is later than the start of the fourth time window.
In embodiment 4, a fifth wireless signal and a sixth wireless signal are transmitted in a fourth time window and a fifth time window, respectively, and the sixth wireless signal is used to determine the starting time of the fourth time window.
As sub-embodiment 1 of embodiment 4, the sixth wireless signal is transmitted on a physical layer control channel.
As sub-embodiment 2 of embodiment 4, the sixth radio signal is cell-common.
In embodiment 4, the transmitter can occupy the fourth time window in time to transmit the fifth wireless signal-the corresponding control information can be transmitted later.
Example 5
Example 5 illustrates a schematic diagram of a plurality of time windows, as shown in fig. 5.
In embodiment 5, the seventh wireless signal is transmitted in the sixth time window. The seventh wireless signal indicates that the first wireless signal is not correctly decoded and the second wireless signal indicates that the first wireless signal is correctly decoded. The sixth time window precedes the second time window.
As sub-embodiment 1 of embodiment 5, the seventh wireless signal and the second wireless signal are both transmitted in a first resource pool, where the first resource pool includes a positive integer number of time-frequency resource blocks, where the time-frequency resource blocks include a plurality of RUs, and the RUs occupy one subcarrier in a frequency domain and occupy a duration of one multicarrier symbol in a time domain.
Example 6
Embodiment 6 illustrates a schematic diagram of a second wireless signal, as shown in fig. 6. In fig. 6, the squares filled with oblique lines are time domain resources occupied by the first wireless signal, and the squares filled with NACK and ACK represent the time domain resources occupied by NACK and the time domain resources occupied by ACK, respectively. Where the NACK-filled tiles are optional.
In embodiment 6, the first wireless signal received by the third time is used to determine the first ACK, as indicated by arrow AR 3. The receiver correctly decodes the first wireless signal at the third time, and the receiver abandons receiving the first wireless signal from the third time. The receiver continues to send ACKs after the first ACK (as indicated by arrow AR 4) to improve robustness.
As sub-embodiment 1 of embodiment 6, the second wireless signal in the present invention includes all ACKs in fig. 6.
As sub-embodiment 2 of embodiment 6, the receiver sends a NACK before the first ACK. The first wireless signal received until the first time is used to determine the first NACK (the receiver fails to correctly decode the first wireless signal until the first time as indicated by arrow AR 1), and the first wireless signal received until the second time is used to determine the last NACK (the receiver fails to correctly decode the first wireless signal until the first time as indicated by arrow AR 2).
As sub-embodiment 1 of embodiment 6, the second wireless signal in the present invention includes all ACKs and all NACKs in fig. 6.
As sub-embodiment 2 of embodiment 6, one of the ACKs occupies one multicarrier symbol.
As sub-embodiment 3 of embodiment 6, one said NACK occupies one multicarrier symbol.
Example 7
Embodiment 7 illustrates a flowchart of the first wireless signal transmission, as shown in fig. 7.
In embodiment 7, the transmitter transmits a first wireless signal in step S50. In step S51, it is determined whether the first wireless signal is correctly decoded. If the judgment result of the step S51 is YES, stopping transmitting the first wireless signal in step S53; otherwise, in step S52, it is determined whether the duration of the first wireless signal is less than the first time length. If the judgment result of the step S52 is yes, jumping to the step S50 to continue to transmit the first wireless signal; otherwise, the transmission of the first wireless signal is stopped in step S53.
As sub-embodiment 1 of embodiment 7, the transmitter is a device in a base station.
As sub-embodiment 2 of embodiment 7, the transmitter is a device in a UE.
As sub-embodiment 3 of embodiment 7, in step S51, the transmitter monitors the second wireless signal to determine whether the first wireless signal is correctly decoded.
As sub-embodiment 4 of embodiment 7, the first wireless signal transmitted each time in step S50 includes L multicarrier symbols in the time domain, where L is a positive integer, and where L is default or configurable.
As sub-embodiment 5 of embodiment 7, all multicarrier symbols occupied by said first radio signal are contiguous in time domain.
Example 8
Embodiment 8 illustrates a block diagram of a processing device in a UE, as shown in fig. 8. In fig. 8, the processing apparatus 100 is mainly composed of a first receiving module 101 and a second receiving module 102.
The first module 101 is configured to receive a first wireless signal in a first time window; the second module 102 is configured to transmit a second wireless signal in a second time window.
In embodiment 8, the first time window belongs to the third time window, the time domain resource occupied by the first wireless signal belongs to the third time window, and the ending time of the third time window is later than the starting time of the second time window. The second wireless signal is used to determine at least one of { the first wireless signal is correctly decoded, the first wireless signal is not correctly decoded }, the second wireless signal is used to determine an expiration of the third time window.
As sub-embodiment 1 of embodiment 8, the first module 101 is further configured to receive a fifth wireless signal in a fourth time window.
As sub-embodiment 2 of embodiment 8, the first module 101 is further configured to receive a sixth wireless signal in a fifth time window.
As sub-embodiment 3 of embodiment 8, the second module 102 is further configured to transmit a seventh wireless signal in a sixth time window.
Example 9
Embodiment 9 is a block diagram illustrating a processing apparatus in a base station, as shown in fig. 9. In fig. 9, the processing apparatus 200 is mainly composed of a third module 201 and a fourth module 202.
The third module 201 is configured to transmit a first wireless signal in a third time window; the fourth module 202 is configured to receive a second wireless signal in a second time window.
In embodiment 9, the time domain resource occupied by the first wireless signal belongs to a third time window, and a deadline of the third time window is later than a start time of the second time window. The second wireless signal is used to determine at least one of { the first wireless signal is correctly decoded, the first wireless signal is not correctly decoded, an expiration of the third time window }.
As sub-embodiment 1 of embodiment 9, the third module 201 is further configured to { at least one of transmit a fifth wireless signal in a fourth time window, and transmit a sixth wireless signal in a fifth time window }. Wherein the second wireless signal indicates that the first wireless signal is correctly decoded. The time interval between the starting time of the fourth time window and the starting time of the first time window is less than the first time length. The frequency domain resources occupied by the fifth wireless signal overlap with the frequency domain resources occupied by the first wireless signal. The start time of the fifth time window is after the end time of the second time window, and the sixth wireless signal is used to determine at least one of { the end time of the third time window, the start time of the fourth time window }.
As sub-embodiment 2 of embodiment 9, at least one target multicarrier symbol does not belong to a time domain resource occupied by the first radio signal in the third time window. As an embodiment, the target multicarrier symbol is reserved for at least one of { downlink RS, control channel }.
As sub-embodiment 3 of embodiment 9, the fourth module 202 is further configured to receive a seventh wireless signal in a sixth time window.
Example 10
Embodiment 10 illustrates a block diagram of a processing device in a UE, as shown in fig. 10. In fig. 10, the processing apparatus 300 mainly comprises a first receiving module 301 and a second receiving module 302.
The first module 301 is configured to transmit a first wireless signal in a third time window; the second module 302 is configured to receive a second wireless signal in a second time window.
In embodiment 10, the first time window belongs to the third time window, the time domain resource occupied by the first wireless signal belongs to the third time window, and the ending time of the third time window is later than the starting time of the second time window. The second wireless signal is used to determine at least one of { the first wireless signal is correctly decoded, the first wireless signal is not correctly decoded }, the second wireless signal is used to determine an expiration of the third time window.
As sub-embodiment 1 of embodiment 10, the first module 301 is further configured to transmit a fifth wireless signal in a fourth time window.
As sub-embodiment 2 of embodiment 10, the first module 301 is further configured to transmit a sixth wireless signal in a fifth time window.
As sub-embodiment 3 of embodiment 10, the second module 302 is further configured to receive a seventh wireless signal in a sixth time window.
Example 11
Embodiment 11 illustrates a block diagram of a processing apparatus in a base station, as shown in fig. 11. In fig. 11, the processing apparatus 400 is mainly composed of a third module 401 and a fourth module 402.
The third module 401 is configured to receive a first wireless signal in a first time window; the fourth module 402 is configured to transmit a second wireless signal in a second time window.
In embodiment 11, the time domain resource occupied by the first wireless signal belongs to a third time window, and a deadline of the third time window is later than a start time of the second time window. The second wireless signal is used to determine at least one of { the first wireless signal is correctly decoded, the first wireless signal is not correctly decoded, an expiration of the third time window }.
As sub-embodiment 1 of embodiment 11, the third module 401 is further configured to { receive a fifth wireless signal in a fourth time window, and receive a sixth wireless signal in a fifth time window }.
As sub-embodiment 2 of embodiment 11, the fourth module 402 is further configured to transmit a seventh wireless signal in a sixth time window.
It will be understood by those skilled in the art that all or part of the steps of the above methods may be implemented by instructing relevant hardware through a program, and the program may be stored in a computer readable storage medium, such as a read-only memory, a hard disk or an optical disk. Alternatively, all or part of the steps of the above embodiments may be implemented by using one or more integrated circuits. Accordingly, the module units in the above embodiments may be implemented in a hardware form, or may be implemented in a form of software functional modules, and the present application is not limited to any specific form of combination of software and hardware. The UE and the terminal in the present invention include, but are not limited to, a mobile phone, a tablet computer, a notebook computer, a vehicle-mounted Communication device, a wireless sensor, a network card, an internet of things terminal, an RFID terminal, an NB-IOT terminal, an MTC (Machine Type Communication) terminal, an eMTC (enhanced MTC) terminal, a data card, a network card, a vehicle-mounted Communication device, a low-cost mobile phone, a low-cost tablet computer, and other wireless Communication devices. The base station in the present invention includes, but is not limited to, a macro cell base station, a micro cell base station, a home base station, a relay base station, and other wireless communication devices.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims (14)
1. A method to be used in a low latency UE, comprising the steps of:
-step A0. receiving a third wireless signal;
-a. processing a first wireless signal in a target time window;
-step b. operating the second radio signal in a second time window;
wherein the processing is receiving and the operation is transmitting, the target time window is a first time window; or the processing is transmitting and the operation is receiving, the target time window being a third time window; the time domain resource occupied by the first wireless signal belongs to a third time window, and the ending time of the third time window is later than the starting time of the second time window; the second wireless signal is used to determine at least one of { the first wireless signal is correctly decoded, the first wireless signal is not correctly decoded, an expiration of the third time window }; the transmission start time of the second wireless signal is earlier than the transmission stop time of the first wireless signal; the third wireless signal is used to determine a first resource pool comprising G1 time-frequency resource blocks comprising a plurality of RUs occupying one subcarrier in the frequency domain and one multicarrier symbol duration in the time domain; the second wireless signal occupies G2 time-frequency resource blocks in the first resource pool; the G1 is a positive integer, the G2 is a positive integer less than or equal to the G1; the first wireless signal occupies each multicarrier symbol in the third time window.
2. The method of claim 1, wherein step a further comprises the steps of:
-a step a1. receiving a fourth radio signal;
wherein the fourth radio signal is used to determine at least one of { a first time length, a frequency domain resource occupied by the first radio signal }, and a duration of the third time window does not exceed the first time length.
3. The method of claim 2, further comprising the steps of:
-step c. processing the fifth radio signal in a fourth time window;
wherein the second wireless signal indicates that the first wireless signal is correctly decoded; the time interval between the starting time of the fourth time window and the starting time of the first time window is less than the first time length; the frequency domain resources occupied by the fifth wireless signal overlap with the frequency domain resources occupied by the first wireless signal.
4. The method of claim 3, further comprising the steps of:
step C0. processes the sixth wireless signal in a fifth time window;
wherein a start time of the fifth time window is subsequent to an end time of the second time window, the sixth wireless signal being used to determine at least one of { the end time of the third time window, the start time of the fourth time window }.
5. The method according to any one of claims 1 to 3, wherein said step B further comprises the steps of:
-step b1. operating the seventh radio signal in a sixth time window;
wherein the seventh wireless signal indicates that the first wireless signal is not correctly decoded and the second wireless signal indicates that the first wireless signal is correctly decoded; the sixth time window precedes the second time window.
6. A method used in a low-latency base station, comprising the steps of:
-step A0. sending a third wireless signal;
-a. operating a first wireless signal in a target time window;
-step b. processing the second radio signal in a second time window;
wherein the operation is a transmission and the processing is a reception, the target time window is a third time window; or the operation is reception and the processing is transmission, the target time window being a first time window; the time domain resource occupied by the first wireless signal belongs to a third time window, and the ending time of the third time window is later than the starting time of the second time window; the second wireless signal is used to determine at least one of { the first wireless signal is correctly decoded, the first wireless signal is not correctly decoded, an expiration of the third time window }; the transmission start time of the second wireless signal is earlier than the transmission stop time of the first wireless signal; the third wireless signal is used to determine a first resource pool comprising G1 time-frequency resource blocks comprising a plurality of RUs occupying one subcarrier in the frequency domain and one multicarrier symbol duration in the time domain; the second wireless signal occupies G2 time-frequency resource blocks in the first resource pool; the G1 is a positive integer, the G2 is a positive integer less than or equal to the G1; the first wireless signal occupies each multicarrier symbol in the third time window.
7. The method of claim 6, wherein step A further comprises the steps of:
-a step a1. transmitting a fourth radio signal;
wherein the fourth radio signal is used to determine at least one of { a first time length, a frequency domain resource occupied by the first radio signal }, and a duration of the third time window does not exceed the first time length.
8. The method of claim 7, further comprising the steps of:
-step c. operating the fifth radio signal in a fourth time window;
wherein the second wireless signal indicates that the first wireless signal is correctly decoded; the time interval between the starting time of the fourth time window and the starting time of the first time window is less than the first time length; the frequency domain resources occupied by the fifth wireless signal overlap with the frequency domain resources occupied by the first wireless signal.
9. The method of claim 8, further comprising the steps of:
step C0. operates the sixth wireless signal in a fifth time window;
wherein a start time of the fifth time window is subsequent to an end time of the second time window, the sixth wireless signal being used to determine at least one of { the end time of the third time window, the start time of the fourth time window }.
10. The method according to any one of claims 6 to 8, wherein said step B further comprises the steps of:
-step b1. processing the seventh radio signal in a sixth time window;
wherein the seventh wireless signal indicates that the first wireless signal is not correctly decoded and the second wireless signal indicates that the first wireless signal is correctly decoded; the sixth time window precedes the second time window.
11. A user equipment supporting low latency, comprising:
a first module: for receiving the third wireless signal and processing the first wireless signal in the target time window;
a second module: for operating the second wireless signal in a second time window;
wherein the processing is receiving and the operation is transmitting, the target time window is a first time window; or the processing is transmitting and the operation is receiving, the target time window being a third time window; the time domain resource occupied by the first wireless signal belongs to a third time window, and the ending time of the third time window is later than the starting time of the second time window; the second wireless signal is used to determine at least one of { the first wireless signal is correctly decoded, the first wireless signal is not correctly decoded, an expiration of the third time window }; the transmission start time of the second wireless signal is earlier than the transmission stop time of the first wireless signal; the third wireless signal is used to determine a first resource pool comprising G1 time-frequency resource blocks comprising a plurality of RUs occupying one subcarrier in the frequency domain and one multicarrier symbol duration in the time domain; the second wireless signal occupies G2 time-frequency resource blocks in the first resource pool; the G1 is a positive integer, the G2 is a positive integer less than or equal to the G1; the first wireless signal occupies each multicarrier symbol in the third time window.
12. The UE of claim 11, wherein the first module is further configured to { at least one of process a fifth radio signal in a fourth time window and process a sixth radio signal in a fifth time window };
wherein the second wireless signal indicates that the first wireless signal is correctly decoded; the time interval between the starting time of the fourth time window and the starting time of the first time window is less than the first time length; the frequency domain resource occupied by the fifth wireless signal and the frequency domain resource occupied by the first wireless signal are overlapped; the start time of the fifth time window is after the end time of the second time window, and the sixth wireless signal is used to determine at least one of { the end time of the third time window, the start time of the fourth time window }.
13. A base station device supporting low latency, comprising:
a third module: for transmitting a third wireless signal and operating the first wireless signal in a target time window;
a fourth module: for processing the second wireless signal in a second time window;
wherein the operation is a transmission and the processing is a reception, the target time window is a third time window; or the operation is reception and the processing is transmission, the target time window being a first time window; the time domain resource occupied by the first wireless signal belongs to a third time window, and the ending time of the third time window is later than the starting time of the second time window; the second wireless signal is used to determine at least one of { the first wireless signal is correctly decoded, the first wireless signal is not correctly decoded, an expiration of the third time window }; the transmission start time of the second wireless signal is earlier than the transmission stop time of the first wireless signal; the third wireless signal is used to determine a first resource pool comprising G1 time-frequency resource blocks comprising a plurality of RUs occupying one subcarrier in the frequency domain and one multicarrier symbol duration in the time domain; the second wireless signal occupies G2 time-frequency resource blocks in the first resource pool; the G1 is a positive integer, the G2 is a positive integer less than or equal to the G1; the first wireless signal occupies each multicarrier symbol in the third time window.
14. The base station device of claim 13, wherein the third module is further configured to { at least one of operate a fifth wireless signal in a fourth time window and operate a sixth wireless signal in a fifth time window };
wherein the second wireless signal indicates that the first wireless signal is correctly decoded; the time interval between the starting time of the fourth time window and the starting time of the first time window is less than the first time length; the frequency domain resource occupied by the fifth wireless signal and the frequency domain resource occupied by the first wireless signal are overlapped; the start time of the fifth time window is after the end time of the second time window, and the sixth wireless signal is used to determine at least one of { the end time of the third time window, the start time of the fourth time window }.
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