CN113115592B - HARQ-ACK transmission method and device and communication equipment - Google Patents
HARQ-ACK transmission method and device and communication equipment Download PDFInfo
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Abstract
The application discloses a HARQ transmission method and device and communication equipment. The HARQ-ACK transmission method is applied to User Equipment (UE) and comprises the following steps: receiving first DCI that schedules PDSCH resources on an unlicensed channel; wherein the first DCI comprises a time domain offset K1 information domain; when a K1 information domain contained in the first DCI carries a first value and a second DCI carrying a second value is not received in N time slots after the PDSCH resource, sending HARQ-ACK (hybrid automatic repeat request-acknowledgement) on the Nth time slot after the PDSCH resource and/or the time slot after the Nth time slot, wherein N is a positive integer, and the second value is different from the first value; and the HARQ-ACK is feedback information of downlink data transmitted by the PDSCH resource scheduled by the first DCI.
Description
Technical Field
The present disclosure relates to the field of wireless communications, but not limited to the field of wireless communications, and in particular, to a method and an apparatus for transmitting a Hybrid Automatic Repeat request acknowledgement (HARQ-ACK), and a communication device.
Background
On the unlicensed Channel of the fifth generation (5th generation, 5g) New Radio (NR), when the base station schedules a Physical Downlink Shared Channel (PDSCH) resource (configured as a communication resource of the PDSCH), it needs to indicate a corresponding HARQ-ACK transmission resource for data transmitted by the PDSCH resource.
A non-numerical time domain offset (K1) information domain is introduced into DCI for scheduling PDSCH resources on a 5G NR unlicensed channel (NR-U). And when the K1 information domain is used for carrying non-numerical time domain offset, determining that the User Equipment (User Equipment, UE) does not feed back the HARQ-ACK of the PDSCH scheduled by the current DCI temporarily, and feeding back the HARQ-ACK for the PDSCH which does not feed back the HARQ-ACK after a subsequent terminal receives the time domain offset of the normal numerical value carried by the K1 information domain in the DCI.
Disclosure of Invention
The embodiment of the application discloses a HARQ transmission method and device and communication equipment.
A first aspect of the embodiments of the present application provides a method for HARQ-ACK transmission, which is applied to a UE and includes:
receiving first Downlink Control Information (DCI) for scheduling PDSCH resources on an unlicensed channel; the first DCI contains a time domain offset (K1) information field;
when a K1 information domain contained in the first DCI carries a first value and a second DCI carrying a second value is not received in N time slots after the PDSCH resource, sending HARQ-ACK (hybrid automatic repeat request-acknowledgement) on the Nth time slot after the PDSCH resource and/or the time slot after the Nth time slot, wherein N is a positive integer, and the second value is different from the first value; and the HARQ-ACK is feedback information of downlink data transmitted by the PDSCH resource scheduled by the first DCI.
A second aspect of the embodiments of the present application provides a method for HARQ-ACK transmission, which is applied to a base station, and includes:
issuing a first DCI for scheduling PDSCH resources on an unlicensed channel; wherein the first DCI includes a K1 information field;
when a K1 information domain contained in the first DCI carries a first value and a second DCI carrying a second value is not issued in N time slots after the PDSCH resource, receiving HARQ-ACK (hybrid automatic repeat request-acknowledgement) on the Nth time slot after the PDSCH resource and/or a time slot after the Nth time slot, wherein N is a positive integer, and the second value is different from the first value; the HARQ-ACK is feedback information of downlink data transmitted by PDSCH resources scheduled by the first DCI.
A third aspect of the embodiments of the present application provides an apparatus for HARQ-ACK transmission, where the apparatus is applied to a UE, and the apparatus includes:
a first receiving module configured to receive first DCI that schedules PDSCH resources on an unlicensed channel; wherein the first DCI comprises a K1 information field;
a first sending module, configured to send HARQ-ACK at an nth time slot after the PDSCH resources and/or a time slot after the nth time slot when a first value is carried in a K1 information field included in the first DCI and a second DCI carrying a second value is not received in the N time slots after the PDSCH resources, where N is a positive integer and the second value is different from the first value; and the HARQ-ACK is feedback information of downlink data transmitted by the PDSCH resource scheduled by the first DCI.
A fourth aspect of the embodiments of the present application provides an apparatus for HARQ-ACK transmission, including:
a second sending module configured to issue first Downlink Control Information (DCI) for scheduling PDSCH resources on an unlicensed channel; wherein the first DCI comprises a K1 information field;
a second receiving module, configured to receive HARQ-ACK at an nth time slot after the PDSCH resource and/or a time slot after the nth time slot when a K1 information field included in the first DCI carries a first value and a second DCI carrying a second value is not issued in the N time slots after the PDSCH resource, where N is a positive integer and the second value is different from the first value; the HARQ-ACK is feedback information of downlink data transmitted by PDSCH resources scheduled by the first DCI.
A fifth aspect of embodiments of the present application provides a communication device, including:
an antenna is provided, which is capable of transmitting,
a memory;
a processor, connected to the antenna and the memory respectively, configured to control transceiving of wireless signals of the antenna by executing computer executable instructions stored on the memory, and to implement the HARQ-ACK transmission method provided in the foregoing first aspect or second aspect.
According to the technical scheme provided by the embodiment of the application, when the K1 information domain of the first DCI for scheduling the PDSCH resources carries the first value, if the second DCI carrying the second value is received in the K1 information domain in N time slots after the PDSCH resources, on one hand, the base station can timely receive the HARQ-ACK, and on the other hand, when the control information load in the cell is more under some conditions, the base station can receive the HARQ-ACK based on the mode, so that the resource scheduling of the HARQ-ACK transmission is realized, and the overhead of scheduling signaling is reduced.
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Fig. 1 is a schematic structural diagram of a wireless communication system according to an embodiment of the present disclosure;
fig. 2 is a flowchart illustrating a HARQ-ACK transmission method according to an embodiment of the present disclosure;
fig. 3 is a flowchart illustrating a HARQ-ACK transmission method according to an embodiment of the present disclosure;
fig. 4 is a flowchart illustrating a HARQ-ACK transmission method according to an embodiment of the present disclosure;
fig. 5 is a flowchart illustrating a HARQ-ACK transmission method according to an embodiment of the present disclosure;
fig. 6 is a schematic structural diagram of an HARQ-ACK transmission apparatus according to an embodiment of the present disclosure;
fig. 7 is a schematic structural diagram of an HARQ-ACK transmitting apparatus according to an embodiment of the present disclosure;
fig. 8 is a schematic structural diagram of a UE according to an embodiment of the present disclosure;
fig. 9 is a schematic structural diagram of a base station according to an embodiment of the present disclosure.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the examples of this application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the embodiments of the application, as detailed in the appended claims.
The terminology used in the embodiments of the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the embodiments of the present disclosure. As used in the disclosed embodiments and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
It is to be understood that although the terms first, second, third, etc. may be used herein to describe various information in the embodiments of the present disclosure, such information should not be limited by these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of embodiments of the present disclosure. The word "if" as used herein may be interpreted as "at" \8230; "or" when 8230; \8230; "or" in response to a determination ", depending on the context.
Referring to fig. 1, a schematic structural diagram of a wireless communication system according to an embodiment of the disclosure is shown. As shown in fig. 1, the wireless communication system is a communication system based on a cellular mobile communication technology, and may include: several UEs 11 and several base stations 12.
Among other things, the UE11 may refer to a device that provides voice and/or data connectivity to a user. The UE11 may communicate with one or more core networks via a Radio Access Network (RAN), and the UE11 may be an internet of things UE, such as a sensor device, a mobile phone (or called "cellular" phone), and a computer having the internet of things UE, and may be a fixed, portable, pocket, handheld, computer-included, or vehicle-mounted device, for example. For example, a Station (STA), a subscriber unit (subscriber unit), a subscriber Station (subscriber Station), a mobile Station (mobile), a remote Station (remote Station), an access point (ap), a remote UE (remote), an access UE (access terminal), a user equipment (user terminal), a user agent (user agent), a user equipment (user device), or a user UE (user equipment, UE). Alternatively, the UE11 may be a device of an unmanned aerial vehicle. Alternatively, the UE11 may also be a vehicle-mounted device, for example, a vehicle computer with a wireless communication function, or a wireless communication device externally connected to the vehicle computer. Alternatively, the UE11 may be a roadside device, for example, a street lamp, a signal lamp or other roadside device with a wireless communication function.
The base station 12 may be a network side device in a wireless communication system. The wireless communication system may be a 5G system, which is also called a New Radio (NR) system or a 5G NR system. Alternatively, the wireless communication system may be a system supporting New air-interface unlicensed-spectrum communication (NR-U). Alternatively, the wireless communication system may be a next generation system of a 5G system. Among them, the Access Network in the 5G system may be referred to as NG-RAN (New Generation-Radio Access Network).
The base station 12 may be a base station (gNB) in a 5G system and adopting a centralized distributed architecture. When the base station 12 adopts a centralized distributed architecture, it generally includes a Centralized Unit (CU) and at least two Distributed Units (DU). A Packet Data Convergence Protocol (PDCP) layer, a Radio Link layer Control Protocol (RLC) layer, and a Media Access Control (MAC) layer are provided in the central unit; a Physical (PHY) layer protocol stack is disposed in the distribution unit, and the embodiment of the present disclosure does not limit the specific implementation manner of the base station 12.
The base station 12 and the UE11 may establish a radio connection over a radio air interface. In different embodiments, the wireless air interface is a wireless air interface based on a fifth generation mobile communication network technology (5G) standard, for example, the wireless air interface is a new air interface; alternatively, the wireless air interface may be a wireless air interface based on a 5G next generation mobile communication network technology standard.
In some embodiments, an E2E (End to End) connection may also be established between UEs 11. In some embodiments, the wireless communication system may further include a network management device 13.
As shown in fig. 2, an embodiment of the present application provides a method for HARQ-ACK transmission, where the method, applied to a UE, includes:
s110: receiving first DCI that schedules PDSCH resources on an unlicensed channel; wherein the first DCI contains a K1 information field;
s120: when a K1 information domain contained in the first DCI carries a first value and a second DCI carrying a second value is not received in N time slots after the PDSCH resource, sending HARQ-ACK (hybrid automatic repeat request-acknowledgement) on the Nth time slot after the PDSCH resource and/or the time slot after the Nth time slot, wherein N is a positive integer, and the second value is different from the first value; and the HARQ-ACK is feedback information of downlink data transmitted by the PDSCH resource scheduled by the first DCI.
The UE in the embodiment of the present application may be various types of UEs, for example, a common mobile terminal and a Machine Type Communication (MTC) terminal. A general mobile terminal may include: a cell phone, a tablet computer, or a wearable device. MTC terminals include, but are not limited to, intelligent Internet of Things (IoT) devices. The IoT devices include, but are not limited to, smart water meters and/or smart electricity meters, and the like.
The UE receives first DCI scheduling PDSCH resources on an unlicensed channel. The first DCI may indicate PDSCH resources. In this way, the UE may receive downlink data transmitted by the base station on the corresponding PDSCH resources according to the first DCI. The first DCI is one of DCIs transmitted by the base station in the physical layer. The PDSCH resource is a communication resource configured for PDSCH to transmit downlink data.
The first DCI comprises a K1 information domain, and the values carried in the K1 information domain can be divided into two types, one type is the first value, and the other type is the second value. The number of the first value and the second value can be one or more. For example, the first value may be one of K1 information field portability values. For example, the K1 information field includes: 3 binary bits, the value carried by the K1 information field is from 0 to 7. At this time, the first value may be any one of 0 to 7. For example, the first value may be 0, and the second value may be any one of 1 to 7.
If the first value is 1, other values of the KI information domain are the second values, so that the second values have a larger value range, and the scheduling flexibility of the base station when the base station schedules PUCCH resources to upload HARQ-ACK based on the K1 information domain is maintained to be maximized.
And if the K1 information field carries a first value, the first value indicates that the HARQ-ACK is not triggered to be sent. The HARQ-ACK may be a HARQ-ACK transmitted based on a one shot (one slot) HARQ-ACK feedback mechanism. The one-time HARQ-ACK feedback mechanism here is: and the HARQ-ACK transmission mechanism is used for transmitting all the HARQ-ACK of all the HARQ processes at one time. Certainly, in the embodiment of the present application, the HARQ-ACK reported by the UE may also be in a feedback mode of a non-disposable HARQ-ACK feedback mechanism, for example, only reporting the HARQ-ACK of the HARQ process corresponding to the currently transmitted downlink data.
And if the K1 information field carries the second value, the HARQ-ACK sending is triggered.
After receiving the first DCI, the UE may monitor the second DCI in N time slots after the PDSCH resource indicated by the first DCI. Here, the second DCI and the first DCI are both DCI transmitted by the base station, and the difference is that: the first DCI and the second DCI are DCI issued by the base station at different time. If the base station does not receive the second DCI carrying the second value in the K1 information field, the UE still has the requirement of sending the HARQ-ACK so as to trigger the data retransmission of the base station when the downlink data reception fails. In the embodiment of the application, the HARQ-ACK is sent on the Nth time slot after the PDSCH resource and/or the time slot after the Nth time slot, so that when the PUCCH resource of the HARQ-ACK is sent under the condition that a base station does not pass signaling scheduling, the UE automatically uses the corresponding PUCCH resource to report the HARQ-ACK. On one hand, the base station can receive the HARQ-ACK in time, on the other hand, under some conditions, if the control information load in the cell is large, the base station can receive the HARQ-ACK based on the mode, and after the first DCI carrying the first value is issued to the K1 information domain, the feedback of the HARQ-ACK is not required to be specially triggered by issuing one DCI, so that the resource scheduling of the HARQ-ACK transmission is realized, and the overhead of the scheduling signaling is reduced.
The sending HARQ-ACK in the nth slot after the PDSCH resources and/or the slot after the nth slot may include at least one of:
transmitting the HARQ-ACK on an Nth time slot after the PDSCH resource;
transmitting the HARQ-ACK on a time slot after the Nth time slot after the PDSCH resource;
transmitting the HARQ-ACK on the Nth time slot after the PDSCH resource and the time slot after the Nth time slot;
wherein the HARQ-ACK is feedback information of downlink data sent by the PDSCH resource of the first DCI.
Transmitting the HARQ-ACK at the nth slot and/or a slot after the nth slot after using the PDSCH resources may include: and transmitting the HARQ-ACK once or more times on the Nth time slot and/or the time slot after the Nth time slot.
Specifically, the HARQ-ACK is sent by using the PUCCH resource of the nth slot after the PDSCH resource and/or the slot after the nth slot.
The PUCCH resource is a communication resource configured to transmit various data to the PUCCH.
One or more PUCCH resource sets are configured in one time slot, and one or more PUCCH resources are selected from the PUCCH resource sets on the Nth time slot after the PDSCH resource and/or the time slot after the Nth time slot after the PDSCH resource of the UE to send the HARQ-ACK. For example, in some embodiments, the method further comprises: and determining PUCCH resources for sending the HARQ-ACK on an Nth time slot after the PDSCH resources and/or a time slot after the Nth time slot according to the PRI contained in the first DCI.
The PRI may carry an Identification (ID) of a PUCCH resource, and when it is determined that there is a transmission opportunity of the HARQ-ACK in an Nth slot after a PDSCH resource and/or one or more slots after the Nth slot, each slot may be configured with a plurality of PUCCH resources. And the PRI carries a PUCCH resource ID indicating which PUCCH resource on the corresponding slot is used to transmit the HARQ-ACK.
Therefore, even if the K1 information field in the first DCI carries the first value, the PRI information field included in the first DCI is still the valid information field, and may be used for the indication of the PUCCH resource, thereby reducing the waste of bits included in the PRI information field in the first DCI.
In some embodiments, the method further comprises:
when receiving second DCI with a second value carried by a K1 information domain in N time slots after PDSCH resources, determining PUCCH resources for transmitting HARQ-ACK according to the K1 information domain and a physical uplink control channel Resource Indicator (PRI) information domain contained in the second DCI;
transmitting the HARQ-ACK on the determined PUCCH resource.
Therefore, the base station can determine whether to dispatch the PUCCH resource bearing the HARQ-ACK through the second DCI carrying the second value to the K1 information domain or not according to the urgency of the requirement for receiving the HARQ-ACK and/or the number of downlink dispatching signaling, or the UE and the base station respectively determine the PUCCH resource receiving the HARQ-ACK according to the method.
In some embodiments, S120 as shown in fig. 3 may include step S121; the S121 may include: transmitting the HARQ-ACK in M time slots starting from the Nth time slot after the PDSCH resources; wherein M is a positive integer.
The M may be any positive integer, when M is equal to 1, the UE may send HARQ-ACK only on the nth slot after the PDSCH resource, and if M is equal to 2, the UE may send HARQ-ACK on 2 slots starting at the nth slot after the PDSCH resource.
The value of M may be any positive integer, specifically, 2, 3, or 4.
When M is greater than or equal to 2, the UE has multiple opportunities to transmit HARQ-ACK, so as to reduce a phenomenon that the HARQ-ACK cannot be transmitted when the UE does not occupy an unlicensed spectrum channel on only one transmission opportunity based on Listen Before Talk (LBT), and improve a probability of successful transmission of the HARQ-ACK.
In some embodiments, the M slots may be consecutive M slots; at this time, the UE may select a slot for transmitting the HARQ-ACK including: and the Nth time slot to the (N + M-1) th time slot after the PDSCH resources. And the HARQ-ACK can be fed back to the base station possibly quickly by adopting the continuous M time slots.
In other embodiments, the M time slots are spaced apart. Such intervals may be periodic intervals. That is, the M slots may be: m time slots distributed at periodic intervals. At this time, the UE may select a slot for transmitting HARQ-ACK including: the Mth time slot and the N + S M-1 time slot after the PDSCH resource. S is an interval slot of a periodic interval. M is a positive integer less than or equal to M. And the M time slots are distributed at intervals, so that the M time slots are discretized in a time domain, the wireless environments at different time points are different, and the success probability that the UE occupies the channel of the unlicensed spectrum based on the LBT can be improved.
In some embodiments, as shown in fig. 3, the method further comprises:
s100: receiving a higher layer signaling, wherein the higher layer signaling comprises indication information indicating the N and/or the M.
The higher layer signaling may be any signaling of a physical layer or more, for example, radio Resource Control (RRC) signaling.
N and M are configured in the high-layer signaling, so that the base station can keep consistency with the determination of the PUCCH resource by the base station when the UE selects the PUCCH resource for transmitting the HARQ-ACK by issuing N and/or M.
. In some embodiments, the higher layer signaling may be higher layer signaling sent prior to the first DCI. Therefore, the UE can be ensured to accurately select the PUCCH resource of the time slot for sending the HARQ-ACK in the Nth time slot and/or the time slot after the Nth time slot, the phenomenon that the UE misses the time slot for selectively sending the HARQ-ACK due to lack of selection parameters such as N and/or M and the like caused by the fact that the high-level signaling is sent in the Nth time slot is avoided, and the UE can be ensured to successfully select the time slot for sending the HARQ-ACK.
In some embodiments, the higher layer signaling may also include the aforementioned periodic interval S.
In still other embodiments, the aforementioned N, M, and S may all be: determined individually according to a selection policy known to both the base station and the UE. The selection policy may be a write communication protocol, or based on a Main System Message (MSI) broadcast, etc. There are many ways to determine any of the aforementioned N, M, and S, and they are not listed here.
In some embodiments, the nth slot is located after an end symbol, wherein the end symbol is: and the symbol corresponding to the demodulation cut-off of the downlink data sent by the PDSCH resource.
When receiving downlink data sent by PDSCH resources, the UE needs a certain time duration to demodulate the downlink data.
For example, one or more symbols are required for the UE to demodulate the downlink data. A slot after one or more symbols after the PDSCH resources may be set to the nth slot.
And setting the Nth time slot after the end symbol can reduce the phenomenon of HARQ-ACK transmission error or transmission omission caused by starting before downlink data demodulates the PUCCH resource for completely transmitting the HARQ-ACK.
As shown in fig. 4, the present embodiment provides a method for HARQ-ACK transmission, where the method is applied in a base station, and the method includes:
s210: issuing a first DCI for scheduling PDSCH resources on an unlicensed channel; wherein the first DCI contains a K1 information field;
s220: when a K1 information domain contained in the first DCI carries a first value and a second DCI carrying a second value is not issued in N time slots after the PDSCH resource, receiving HARQ-ACK (hybrid automatic repeat request-acknowledgement) on the Nth time slot after the PDSCH resource and/or a time slot after the Nth time slot, wherein N is a positive integer, and the second value is different from the first value; and the HARQ-ACK is feedback information of downlink data transmitted by the PDSCH resource scheduled by the first DCI.
In the embodiment of the application, the base station and the UE determine the PUCCH resource of the HARQ-ACK of the downlink data sent by the UE under the condition that the second DCI carrying the second value is not sent in the K1 information domain in the same way, and receive the HARQ-ACK on the corresponding PUCCH resource. Thus, the signaling overhead and the load capacity of the PUCCH resources for scheduling and transmitting the HARQ-ACK by the base station are reduced.
In some embodiments, as shown in fig. 5, the S220 may include S221; the S221 may include:
receiving the HARQ-ACK in M time slots starting from the Nth time slot after the PDSCH resources; wherein M is a positive integer.
The UE may send one or more HARQ-ACKs in the M slots starting with the nth slot. The UE needs to monitor the channel before sending the HARQ-ACK information, and if the channel is busy, the UE cannot send the HARQ-ACK information. Thus, if M time slots are configured, the UE has multiple chances to send HARQ-ACK, so as to ensure that the base station successfully receives the HARQ-ACK of the corresponding UE.
In some embodiments, the M time slots may be consecutive M time slots; alternatively, the M slots may be: m time slots distributed at periodic intervals.
For example, as shown in fig. 5, the method further comprises:
s200 may include: and issuing a high-layer signaling, wherein the high-layer signaling comprises indication information indicating the N and/or the M.
In some embodiments, the nth slot is located after an end symbol, wherein the end symbol is: and the symbol corresponding to the demodulation end of the downlink data sent by the PDSCH resource can avoid the phenomenon that the UE does not finish the demodulation of the downlink data and is started by the PUCCH resource which is selected to send the HARQ-ACK.
As shown in fig. 6, the present embodiment provides an apparatus for HARQ-ACK transmission, which is applied in a user equipment UE, and includes:
a first receiving module 610 configured to receive first downlink control information DCI for scheduling physical downlink shared channel PDSCH resources on an unlicensed channel; the first DCI comprises a time domain offset K1 information domain;
a first sending module 620, configured to send HARQ-ACK in an nth slot after the PDSCH resource and/or a slot after the nth slot when a time domain offset information field included in the first DCI carries a first value and a second DCI carrying a second value is not received in N slots after the PDSCH resource, where N is a positive integer and the second value is different from the first value.
In some embodiments, the method further comprises:
and determining the PUCCH resource for receiving the HARQ-ACK on the Nth time slot after the PDSCH resource and/or the time slot after the Nth time slot according to the PRI contained in the first DCI.
The PRI may carry an Identification (ID) of a PUCCH resource, and when it is determined that there is a transmission opportunity of the HARQ-ACK in an Nth slot after a PDSCH resource and/or one or more slots after the Nth slot, each slot may be configured with a plurality of PUCCH resources. And the PRI carries a PUCCH resource ID indicating which PUCCH resource on the corresponding slot is used to transmit the HARQ-ACK. In this way, the base station and the UE may determine to transmit and receive the HARQ-ACK on the same PUCCH resource based on the first DCI and the slot determination method.
In some embodiments, the first receiving module 610 and the first sending module 620 may both be program modules; the program modules may be capable of performing the functions of the modules described above when executed by a processor.
In some embodiments, the first receiving module 610 and the first sending module 620 may both be a soft-hard combining module; the soft and hard combining module includes but is not limited to: a field programmable array or a complex programmable array.
In some embodiments, the first receiving module 610 and the first sending module 620 may both be pure hardware modules; the pure hardware module includes, but is not limited to, an application specific integrated circuit.
In some embodiments, the first transmitting module 620 is configured to transmit HARQ-ACK in M slots starting from the nth slot after the PDSCH resources; and M is a positive integer.
In some embodiments, the M slots may be consecutive M slots; alternatively, the M timeslots may be: m time slots distributed at periodic intervals.
In some embodiments, the nth slot is located after an end symbol, wherein the end symbol is: and the symbol corresponding to the demodulation cut-off of the downlink data sent by the PDSCH resource.
In some embodiments, the first receiving module 610 is further configured to receive a higher layer signaling, where the higher layer signaling carries the N and/or the M.
In some embodiments, the apparatus further comprises:
a first determining module configured to determine, according to a PRI included in the first DCI, a PUCCH resource for transmitting the HARQ-ACK at an nth slot after the PDSCH resource and/or a slot after the nth slot.
As shown in fig. 7, the present embodiment provides an apparatus for HARQ-ACK transmission, which is applied in a base station, and includes:
a second sending module 710 configured to issue first downlink control information DCI for scheduling PDSCH resources of a physical downlink shared channel on an unlicensed channel; wherein the first DCI comprises a time domain offset information field;
a second receiving module 720, configured to receive HARQ-ACK at an nth time slot after the PDSCH resource and/or a time slot after the nth time slot when a time domain offset information field included in the first DCI carries a first value and a second DCI carrying a second value is not issued in the N time slots after the PDSCH resource, where N is a positive integer and the second value is different from the first value; and the HARQ-ACK is feedback information of downlink data transmitted by the PDSCH resource scheduled by the first DCI.
In some embodiments, the second receiving module 720 and the second sending module 710 may both be program modules; the program modules may be capable of performing the functions of the modules described above when executed by a processor.
In some embodiments, the second receiving module 720 and the second sending module 710 may be both soft and hard combining modules; the soft and hard combining module includes but is not limited to: a field programmable array or a complex programmable array.
In some embodiments, the second receiving module 720 and the second sending module 710 may both be pure hardware modules; the pure hardware module includes, but is not limited to, an application specific integrated circuit.
In some embodiments, the second receiving module 720 is configured to receive the HARQ-ACK in M slots starting from the nth slot after the PDSCH resources; and M is a positive integer.
In some embodiments, the M slots may be consecutive M slots; alternatively, the M slots may be: m time slots distributed at periodic intervals.
The second sending module 710 is further configured to send a higher layer signaling, where the higher layer signaling carries the N and/or the M.
In some embodiments, the apparatus further comprises:
a second determining module configured to determine, according to the PRI included in the first DCI, a PUCCH resource for receiving the HARQ-ACK at an nth slot after the PDSCH resource and/or a slot after the nth slot.
Two specific examples are provided below in connection with any of the embodiments described above:
example 1:
for the case that the K1 information field in the DCI for scheduling the PDSCH resource is a non-numerical value, if the UE still does not receive the DCI for scheduling the PDSCH resource and containing the K1 information field with a normal numerical value in N time slots after the time slot to which the PDSCH resource belongs, the UE will attempt to transmit the HARQ-ACK corresponding to the PDSCH with the non-numerical value K1 in the last nth time slot of the PDSCH resource.
Its PUCCH resource ID is indicated by the DCI indicating non-value K1. In order to reduce the situation that the UE cannot send the HARQ-ACK due to unsuccessful LBT, the UE may also attempt to send the HARQ-ACK multiple times on the same PUCCH resource in different slots at the nth slot and 1 or more slots after the nth slot.
The nth slot and the N or more slots after the nth slot may be M consecutive slots or M slots at periodic intervals. And when the UE succeeds in sending the data for one time or M transmission opportunities are finished, the UE stops sending the HARQ-ACK of the downlink data of the PDSCH resource corresponding to the non-numerical value K1 information domain.
The values of N and M are configured by the high-level signaling of the base station. The nth slot is: after the end symbol that can complete demodulation in the period after the PDSCH resource is needed to ensure that demodulation of downlink data transmitted by the PDSCH resource is finished.
Example 2:
on the basis of example 1, in the method provided by this example, in the case that the UE cannot send the HARQ-ACK due to unsuccessful LBT, the UE may attempt to send the HARQ-ACK multiple times on the same PUCCH resource in the nth slot and slots after the nth slot, so that the UE has multiple opportunities to transmit the HARQ-ACK, and the probability of successful HARQ-ACK transmission is increased.
In the above improved scheme, the different time slots may be consecutive M time slots, or M time slots periodically spaced. The advantage of using M consecutive slots is that HARQ-ACCK can be transmitted in as short a time as possible. The benefits of using M slots at periodic intervals are: there is a certain interval between different transmission opportunities, and thus the interference in the surrounding radio environment will be different, thus increasing the probability of successful LBT, after which HARQ-ACK can be transmitted. One example value, M =4.
The embodiment of the present disclosure provides a communication device, including:
an antenna;
a memory;
and a processor, respectively connected to the antenna and the memory, for controlling wireless signal transceiving of the antenna by executing computer-executable instructions stored in the memory, and implementing the HARQ-ACK transmission method provided by any of the foregoing technical solutions, for example, executing at least one of the methods shown in fig. 2 to 5.
The disclosed embodiments provide a computer non-transitory storage medium having stored thereon computer-executable instructions; the computer executable instructions, when executed by a processor, can implement the HARQ-ACK transmission method provided by any of the foregoing technical solutions, for example, perform at least one of the methods shown in fig. 2 to 5.
Fig. 8 is an illustration of a UE, which may be embodied as a mobile phone, a computer, a digital broadcast UE, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, and/or the like, in accordance with an exemplary embodiment.
Referring to fig. 8, the ue800 may include one or more of the following components: a processing component 802, a memory 804, a power component 806, a multimedia component 808, an audio component 810, an input/output (I/O) interface 812, a sensor component 814, and a communication component 816.
The processing component 802 generally controls overall operation of the UE800, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing component 802 may include one or more processors 820 to execute instructions to perform all or a portion of the steps of the methods described above. Further, the processing component 802 can include one or more modules that facilitate interaction between the processing component 802 and other components. For example, the processing component 802 can include a multimedia module to facilitate interaction between the multimedia component 808 and the processing component 802.
The memory 804 is configured to store various types of data to support operations at the UE 800. Examples of such data include instructions for any application or method operating on the UE800, contact data, phonebook data, messages, pictures, videos, and so forth. The memory 804 may be implemented by any type or combination of volatile or non-volatile memory devices, such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks.
The multimedia component 808 includes a screen that provides an output interface between the UE800 and the user. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive an input signal from a user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 808 includes a front facing camera and/or a rear facing camera. The front camera and/or the rear camera may receive external multimedia data when the UE800 is in an operation mode, such as a photographing mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.
The audio component 810 is configured to output and/or input audio signals. For example, the audio component 810 includes a Microphone (MIC) configured to receive external audio signals when the UE800 is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signal may further be stored in the memory 804 or transmitted via the communication component 816. In some embodiments, audio component 810 also includes a speaker for outputting audio signals.
The I/O interface 812 provides an interface between the processing component 802 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.
The sensor component 814 includes one or more sensors for providing various aspects of state assessment for the UE 800. For example, sensor component 814 may detect an open/closed status of UE800, a relative positioning of components, such as a display and keypad of UE800, a change in position of UE800 or a component of UE800, the presence or absence of user contact with UE800, a change in orientation or acceleration/deceleration of UE800, and a change in temperature of UE 800. Sensor assembly 814 may include a proximity sensor configured to detect the presence of a nearby object without any physical contact. The sensor assembly 814 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 814 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.
In an exemplary embodiment, the UE800 may be implemented by one or more Application Specific Integrated Circuits (ASICs), digital Signal Processors (DSPs), digital Signal Processing Devices (DSPDs), programmable Logic Devices (PLDs), field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors or other electronic components for performing the above-described methods.
In an exemplary embodiment, a non-transitory computer-readable storage medium comprising instructions, such as the memory 804 comprising instructions, executable by the processor 820 of the UE800 to perform the above-described method is also provided. For example, the non-transitory computer readable storage medium may be a ROM, a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.
Fig. 9 is a schematic diagram of a base station. Referring to fig. 9, base station 900 includes a processing component 922, which further includes one or more processors and memory resources, represented by memory 932, for storing instructions, such as applications, that may be executed by processing component 922. The application programs stored in memory 932 may include one or more modules that each correspond to a set of instructions. Further, processing component 922 is configured to execute instructions to perform the PDCCH monitoring methods shown in fig. 4 and/or fig. 5.
The base station 900 may also include a power supply component 926 configured to perform power management of the base station 900, a wired or wireless network interface 950 configured to connect the base station 900 to a network, and an input/output (I/O) interface 958. The base station 900 may operate based on an operating system stored in memory 932, such as Windows Server (TM), mac OS XTM, unix (TM), linux (TM), free BSDTM, or the like.
Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.
It will be understood that the present application is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.
Claims (21)
1. A method for HARQ-ACK transmission is applied to a User Equipment (UE), and comprises the following steps:
receiving first Downlink Control Information (DCI) for scheduling Physical Downlink Shared Channel (PDSCH) resources on an unlicensed channel; wherein the first DCI comprises a time domain offset information field;
when a time domain offset information domain contained in the first DCI carries a first value and a second DCI carrying a second value is not received in N time slots after the PDSCH resource, HARQ-ACK is sent in the Nth time slot after the PDSCH resource and/or the time slot after the Nth time slot, wherein N is a positive integer, and the second value is different from the first value; the HARQ-ACK is feedback information of downlink data transmitted by PDSCH resources scheduled by the first DCI.
2. The method of claim 1, wherein the sending HARQ-ACK on an Nth slot after the PDSCH resources and/or a slot after the Nth slot comprises:
transmitting the HARQ-ACK in M time slots starting from the Nth time slot after the PDSCH resource; and M is a positive integer.
3. The method of claim 2,
the M time slots are continuous M time slots;
or,
the M slots are: m time slots distributed at periodic intervals.
4. A method according to claim 2 or 3, characterized in that the method further comprises:
receiving a higher layer signaling, wherein the higher layer signaling comprises indication information indicating the N and/or the M.
5. The method according to any of claims 1 to 3, wherein the Nth slot is located after an end symbol, wherein the end symbol is: and the symbol corresponding to the demodulation cutoff of the downlink data sent by the PDSCH resource.
6. The method according to any one of claims 1 to 3, further comprising:
and determining the PUCCH resources for sending the HARQ-ACK on the Nth time slot after the PDSCH resources and/or the time slot after the Nth time slot according to the physical uplink control channel PUCCH resource indication information field contained in the first DCI.
7. A method for HARQ-ACK transmission is applied to a base station and comprises the following steps:
transmitting first Downlink Control Information (DCI) for scheduling Physical Downlink Shared Channel (PDSCH) resources on an unlicensed channel; wherein the first DCI comprises a time domain offset information field;
when a time domain offset information domain contained in the first DCI carries a first value and a second DCI carrying a second value is not issued in N time slots after the PDSCH resource, receiving HARQ-ACK (hybrid automatic repeat request-acknowledgement character) at the Nth time slot after the PDSCH resource and/or a time slot after the Nth time slot, wherein N is a positive integer, and the second value is different from the first value; and the HARQ-ACK is feedback information of downlink data transmitted by the PDSCH resource scheduled by the first DCI.
8. The method of claim 7, wherein the receiving HARQ-ACK on an Nth slot after the PDSCH resources and/or a slot after the Nth slot comprises:
receiving the HARQ-ACK in M time slots starting from the Nth time slot after the PDSCH resource; and M is a positive integer.
9. The method of claim 8,
the M time slots are continuous M time slots;
or,
the M slots are: m time slots distributed at periodic intervals.
10. The method according to claim 8 or 9, characterized in that the method further comprises:
and issuing a higher layer signaling, wherein the higher layer signaling comprises indication information indicating the N and/or the M.
11. The method according to any of claims 7 to 9, wherein the nth slot is located after an end symbol, wherein the end symbol is: and the symbol corresponding to the demodulation cut-off of the downlink data sent by the PDSCH resource.
12. The method according to any one of claims 7 to 9, further comprising:
and determining PUCCH resources for receiving the HARQ-ACK on the Nth time slot after the PDSCH resources and/or the time slot after the Nth time slot according to a Physical Uplink Control Channel (PUCCH) resource indication information field contained in the first DCI.
13. An apparatus for HARQ-ACK transmission, which is applied in a User Equipment (UE), comprising:
a first receiving module configured to receive first downlink control information DCI for scheduling PDSCH resources of a physical downlink shared channel on an unlicensed channel; wherein the first DCI comprises a time domain offset K1 information domain;
a first sending module, configured to send HARQ-ACK on an nth time slot after the PDSCH resource and/or a time slot after the nth time slot when a time domain offset information field included in the first DCI carries a first value and a second DCI carrying a second value is not received in the N time slots after the PDSCH resource, where N is a positive integer and the second value is different from the first value; and the HARQ-ACK is feedback information of downlink data transmitted by the PDSCH resource scheduled by the first DCI.
14. The apparatus of claim 13, wherein the first transmitting module is configured to transmit the HARQ-ACK in M slots starting from the nth slot after the PDSCH resources; wherein M is a positive integer.
15. The apparatus of claim 14,
the M time slots are continuous M time slots;
or,
the M slots are: m time slots distributed at periodic intervals.
16. The apparatus according to any of claims 13 to 15, wherein the nth slot is located after an end symbol, wherein the end symbol is: and the symbol corresponding to the demodulation cut-off of the downlink data sent by the PDSCH resource.
17. The apparatus of any one of claims 13 to 15, further comprising:
a first determining module configured to determine, according to a Physical Uplink Control Channel (PUCCH) resource indication information field included in the first DCI, a PUCCH resource for transmitting the HARQ-ACK at an Nth slot after the PDSCH resource and/or a slot after the Nth slot.
18. An apparatus for HARQ-ACK transmission, comprising, for use in a base station:
a second sending module configured to issue first downlink control information DCI for scheduling PDSCH resources of a physical downlink shared channel on an unlicensed channel; wherein the first DCI comprises a time domain offset information field;
a second receiving module, configured to receive HARQ-ACK at an nth time slot after the PDSCH resource and/or a time slot after the nth time slot when a K1 information field included in the first DCI carries a first value and a second DCI carrying a second value is not issued in the N time slots after the PDSCH resource, where N is a positive integer and the second value is different from the first value; and the HARQ-ACK is feedback information of downlink data transmitted by the PDSCH resource scheduled by the first DCI.
19. The apparatus of claim 18, wherein the second receiving module is configured to receive the HARQ-ACK in M slots starting from the nth slot after the PDSCH resources; wherein M is a positive integer.
20. The apparatus of claim 18 or 19, further comprising:
a second determining module configured to determine, according to a Physical Uplink Control Channel (PUCCH) resource indication information field included in the first DCI, a PUCCH resource for receiving the HARQ-ACK on an Nth slot after the PDSCH resource and/or a slot after the Nth slot.
21. A communication device, comprising:
an antenna is provided on the base plate,
a memory;
a processor, coupled to the antenna and the memory, respectively, configured to control the transceiving of wireless signals of the antenna by executing computer-executable instructions stored on the memory, and to implement the method provided by any of the preceding claims 1 to 6 or 7 to 12.
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| PCT/CN2019/117239 WO2021092732A1 (en) | 2019-11-11 | 2019-11-11 | Harq-ack transmission method and apparatus, and communication device |
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| WO2023004796A1 (en) * | 2021-07-30 | 2023-02-02 | 北京小米移动软件有限公司 | Hybrid automatic repeat request feedback method and device |
| CN115336222A (en) * | 2022-06-28 | 2022-11-11 | 北京小米移动软件有限公司 | Method and device for determining hybrid automatic repeat request (HARQ) feedback |
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