CN110048817B - Method and device for determining HARQ feedback PUCCH resource and user equipment - Google Patents
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Abstract
The invention provides a method and a device for determining HARQ feedback PUCCH resources and user equipment. The method comprises the following steps: on the determined feedback time slot, determining a PUCCH resource set according to the bit number of the HARQ ACK/NACK which needs to be fed back by the feedback time slot; determining available PUCCH resources from the set of PUCCH resources; and determining PUCCH resources for actually transmitting HARQ feedback from the available PUCCH resources according to ARIs in the received DCI. The method and the device can ensure the successful determination of HARQ feedback PUCCH resources and ensure that the UE can perform HARQ feedback in time.
Description
Technical Field
The present invention relates to the field of wireless communication technologies, and in particular, to a method and an apparatus for determining HARQ feedback PUCCH resources, and a user equipment.
Background
In 5G (or NR, New Radio), a base station schedules a UE (User Equipment) through a DCI (Downlink Control Information), which may indicate a Downlink Assignment (DL Assignment) or an uplink Grant (UL Grant). The Downlink assignment is used to indicate data transmitted on a PDSCH (Physical Downlink Shared Channel) to the UE, where the DCI needs to indicate a modulation and coding format of data transmission, time-frequency resources occupied by the PDSCH (e.g., whether the time-frequency resources are the same time Slot (Slot) as the DCI, frequency-domain resources used on the PDSCH, such as PRB (Physical Resource Block) positions and numbers), HARQ (Hybrid Automatic Repeat reQuest) process identification, time information of HARQ feedback, and indication information ARI (ACK/NACK Resource Index) of HARQ feedback resources. The UE receives downlink data at a designated location according to the DCI information, and feeds back ACK/NACK at a PUCCH (Physical Uplink Control Channel) resource at a designated time slot according to a receiving state (ACK needs to be fed back if data is accurately received, and NACK is not accurately received). The base station allocates a plurality of PUCCH resource sets for the UE in advance, each resource set corresponds to at most 8 PUCCH resources, and the PUCCH resources in each resource set can transmit a certain amount of ACK/NACK information. If the base station can allocate 3 PUCCH resource sets for the UE:
PUCCH resource set 1 may transmit ACK/NACK information of at most 2 bits, and may contain 6 PUCCH resources;
PUCCH resource set 2 may transmit more than 2 bits, but not more than 8 bits of ACK/NACK information, and may contain 4 PUCCH resources;
PUCCH resource set 3 may transmit ACK/NACK information of more than 8 bits, and may contain 8 PUCCH resources.
Each PUCCH resource refers to an uplink frequency domain position and a start symbol number and a symbol length occupied.
At present, after receiving downlink data (data can be simultaneously received from a plurality of carriers during carrier aggregation), a UE determines the number of HARQ ACK/NACK bits to be fed back in a slot to be fed back, determines a PUCCH resource set according to the number of bits to be fed back, and then directly determines an actual PUCCH resource through an ARI.
If the feedback of the 4-bit ACK/NACK is needed, selecting a PUCCH resource set 2, and then determining the PUCCH resource for transmitting the feedback according to the ARI contained in the DCI. Typically ARI is 2 bits, which can indicate 4 values at maximum. After the UE selects PUCCH resource set 2, it is feasible to determine the actual PUCCH resource through the ARI without problems. If the number of bits that the UE needs to feed back in a certain slot is 2 bits or 10 bits, at this time, a PUCCH resource set 1 or a PUCCH resource set 3 needs to be selected, and PUCCH resources in the PUCCH resource set 1 or the PUCCH resource set 3 exceed 4, at this time, the actual PUCCH resources cannot be determined through the ARI, and therefore the UE cannot perform HARQ feedback in time.
Disclosure of Invention
The method, the device and the user equipment for determining the HARQ feedback PUCCH resource can ensure the successful determination of the HARQ feedback PUCCH resource and ensure that the UE can perform HARQ feedback in time.
In a first aspect, the present invention provides a method for determining HARQ feedback PUCCH resources, including:
on the determined feedback time slot, determining a PUCCH resource set according to the bit number of HARQ ACK/NACK which needs to be fed back by the feedback time slot;
determining available PUCCH resources from the set of PUCCH resources;
and determining PUCCH resources for actually transmitting HARQ feedback from the available PUCCH resources according to ARIs in the received DCI.
Optionally, the determining available PUCCH resources from the set of PUCCH resources comprises: and determining available PUCCH resources according to the available uplink symbols of the feedback time slot.
Optionally, the determining available PUCCH resources from the set of PUCCH resources comprises: and determining available PUCCH resources according to the PUCCH resources meeting the minimum processing time in the feedback time slot.
Optionally, the determining available PUCCH resources from the set of PUCCH resources comprises: and determining available PUCCH resources according to the PUCCH resources meeting the minimum processing time and the uplink timing advance in the feedback time slot.
Optionally, when the maximum number of values that the ARI can indicate is greater than or equal to the determined number of available PUCCH resources, the determining, according to the ARI in the received DCI, a PUCCH resource actually transmitting HARQ feedback from the available PUCCH resources includes:
and selecting a PUCCH resource corresponding to the value indicated by the ARI from the available PUCCH resources as a PUCCH resource for actually transmitting HARQ feedback.
Optionally, when the maximum number of values that the ARI can indicate is less than the determined number of available PUCCH resources, the determining, according to the ARI in the received DCI, a PUCCH resource actually transmitting HARQ feedback from the available PUCCH resources includes:
sequencing the available PUCCH resources according to the sequence of transmission time, and then selecting the PUCCH resources at the corresponding positions according to the value indicated by the ARI; or sequencing the available PUCCH resources according to the transmission time length sequence, and then selecting the PUCCH resources at the corresponding positions according to the value indicated by the ARI; or sequencing the available PUCCH resources according to the sequence of the transmission end, then selecting the PUCCH resources at the corresponding positions according to the value indicated by the ARI, and taking the selected PUCCH resources as the PUCCH resources for actually transmitting the HARQ feedback.
In a second aspect, the present invention provides an apparatus for determining HARQ feedback PUCCH resources, including:
a first determining unit, configured to determine, on the determined feedback time slot, a PUCCH resource set according to a bit size of HARQ ACK/NACK that needs to be fed back by the feedback time slot;
a second determining unit, configured to determine available PUCCH resources from the PUCCH resource set;
and a third determining unit, configured to determine, according to the ARI in the received DCI, a PUCCH resource for actually transmitting HARQ feedback from the available PUCCH resources.
Optionally, the second determining unit is configured to determine an available PUCCH resource according to the available uplink symbol of the feedback slot.
Optionally, the second determining unit is configured to determine an available PUCCH resource according to a PUCCH resource in the feedback slot that meets the minimum processing time.
Optionally, the second determining unit is configured to determine an available PUCCH resource according to a PUCCH resource in the feedback slot that meets the minimum processing time and the uplink timing advance.
Optionally, the third determining unit is configured to, when the maximum number of values that can be indicated by the ARI is greater than or equal to the determined number of available PUCCH resources, select a PUCCH resource corresponding to the value indicated by the ARI from the available PUCCH resources as a PUCCH resource for actually transmitting HARQ feedback.
Optionally, the third determining unit is configured to, when the maximum number of values that can be indicated by the ARI is smaller than the determined number of available PUCCH resources, sort the available PUCCH resources according to the sequence of transmission times, and then select a PUCCH resource at a corresponding position according to the value indicated by the ARI; or sequencing the available PUCCH resources according to the transmission time length sequence, and then selecting the PUCCH resources at the corresponding positions according to the value indicated by the ARI; or sequencing the available PUCCH resources according to the sequence of the transmission end, then selecting the PUCCH resources at the corresponding positions according to the value indicated by the ARI, and taking the selected PUCCH resources as the PUCCH resources for actually transmitting the HARQ feedback.
In a third aspect, the present invention provides a user equipment, where the user equipment includes the above apparatus for determining HARQ feedback PUCCH resources.
According to the method, the device and the user equipment for determining the HARQ feedback PUCCH resources, provided by the embodiment of the invention, after the PUCCH resource set is determined according to the bit number of the HARQ ACK/NACK needing to be fed back in the feedback time slot, the available PUCCH resources are determined from the PUCCH resource set, and then the PUCCH resources actually transmitting the HARQ feedback are determined from the available PUCCH resources according to the ARI, so that the successful determination of the HARQ feedback PUCCH resources can be ensured, the UE can be ensured to perform HARQ feedback in time, and the spectrum efficiency of the system is improved.
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Fig. 1 is a flowchart of a method for determining HARQ feedback PUCCH resources according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an apparatus for determining HARQ feedback PUCCH resources according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
An embodiment of the present invention provides a method for determining HARQ feedback PUCCH resources, as shown in fig. 1, the method includes:
and S11, determining a PUCCH resource set according to the bit number of the HARQ ACK/NACK which needs to be fed back in the feedback time slot on the determined feedback time slot.
And S12, determining available PUCCH resources from the PUCCH resource set.
And S13, determining PUCCH resources for actually transmitting HARQ feedback from the available PUCCH resources according to ARIs in the received DCI.
Specifically, when the maximum number of the values which can be indicated by the ARI is greater than or equal to the determined number of the available PUCCH resources, selecting a PUCCH resource corresponding to the value indicated by the ARI from the available PUCCH resources as a PUCCH resource actually transmitting HARQ feedback;
when the maximum number of the values which can be indicated by the ARI is smaller than the number of the determined available PUCCH resources, sequencing the available PUCCH resources according to the sequence of transmission time, and then selecting the PUCCH resources at the corresponding positions according to the values indicated by the ARI; or sequencing the available PUCCH resources according to the transmission time length (namely the number of occupied symbols) in sequence, and then selecting the PUCCH resources at the corresponding positions according to the value indicated by the ARI; or sequencing the available PUCCH resources according to the sequence of the transmission end, then selecting the PUCCH resources at the corresponding positions according to the value indicated by the ARI, and taking the selected PUCCH resources as the PUCCH resources for actually transmitting the HARQ feedback.
According to the method for determining the HARQ feedback PUCCH resource, provided by the embodiment of the invention, after the PUCCH resource set is determined according to the bit number of the HARQ ACK/NACK needing to be fed back in the feedback time slot, the available PUCCH resource is determined from the PUCCH resource set, and then the PUCCH resource actually transmitting the HARQ feedback is determined from the available PUCCH resource according to the ARI, so that the successful determination of the HARQ feedback PUCCH resource can be ensured, the UE can be ensured to perform HARQ feedback in time, and the spectrum efficiency of the system is improved.
The following describes the method for determining HARQ feedback PUCCH resources according to the present invention in detail with reference to specific embodiments.
And the UE in the connection state establishes a data radio bearer with the base station and normally carries out data transmission service.
In the process of initially establishing a connection state, the UE first obtains resource configuration information for HARQ feedback through a system message (at this time, the number of bits to be fed back in one slot is not large), and then the base station may configure a PUCCH resource for HARQ feedback for the UE through RRC signaling. And the base station configures a PUCCH resource set for the UE for feeding back ACK/NACK according to the number of the UE serving cells, the configuration of uplink and downlink time slots and the like. If the base station can allocate 3 PUCCH resource sets for the UE:
PUCCH resource set 1 may transmit ACK/NACK information of at most 2 bits, and may contain 6 PUCCH resources (from PUCCH resource index 0 to PUCCH resource index 5);
PUCCH resource set 2 may transmit more than 2 bits, but not more than 8 bits of ACK/NACK information, and may contain 4 PUCCH resources (from PUCCH resource index 0 to PUCCH resource index 3);
PUCCH resource set 3 may transmit ACK/NACK information of more than 8 bits, and may contain 8 PUCCH resources (from PUCCH resource index 0 to PUCCH resource index 7).
And then the base station schedules the UE through the DCI, the UE determines the bit number of the HARQ ACK/NACK needing to be fed back in each time slot according to the actual scheduling situation, and determines a PUCCH resource set according to the size of the bit number needing to be fed back.
Not all PUCCH resources in the PUCCH resource set are applicable to the slot because the PUCCH resources may have a variable length, for example, may occupy one OFDM (Orthogonal Frequency Division Multiplexing) symbol, and may occupy multiple symbols, for example, 4 or 7 or 14 symbols. However, not all symbols of the slot in which HARQ feedback needs to be transmitted are available UL (uplink) symbols, so the available PUCCH resources for the feedback slot need to be determined from the resource set first.
Specifically, the UE determines the available PUCCH resources may be determined according to the number of UL symbols in the feedback slot.
For slot 5, the number of HARQ bits to be fed back is 2, the corresponding PUCCH resource set is 1, the available UL symbols for slot 5 are the last 7 symbols of the 14 symbols, while the first 2 PUCCH resources (PUCCH resource indexes 0 and 1) in PUCCH resource set 1 need to use the first 7 symbols (part or all) of the 14 symbols, and the other 4 PUCCH resources only use part or all of the last 7 symbols. Therefore, the actually available PUCCH resources are 4, which is equal to the maximum number of values that ARI in DCI can indicate 4. The PUCCH resources may be re-identified as 0 to 3 (i.e., the PUCCH resource originally indexed by 2 is identified as 0, the PUCCH resource originally indexed by 3 is identified as 1, and the other PUCCH resources are sequentially numbered), and then the UE determines the PUCCH resource actually transmitting the HARQ feedback according to the ARI in the DCI. If the ARI indication 11 indicates 3, the PUCCH resource of identification 3 (the resource index in the original PUCCH resource set 1 is 5) is obtained from the available PUCCH resources as the PUCCH resource for actually transmitting the HARQ feedback.
Optionally, the process of renumbering the PUCCH resources by the UE may be omitted, and the UE obtains the corresponding available PUCCH resource from the PUCCH resource set 1 according to the ARI value in the DCI, and if the ARI value is 0, obtains the first available PUCCH resource from the PUCCH resource set 1 as the PUCCH resource actually fed back for transmission; and if the ARI value is 2, acquiring the 3 rd available PUCCH resource from the PUCCH resource set 1 as the PUCCH resource for actually transmitting feedback.
Alternatively, the available PUCCH resources may also be determined according to the sum of the UL symbols and the unknown symbols in the feedback slot, for example, if the number of UL symbols is 7 symbols, and the number of unknown symbols is 2, a total of 9 symbols are considered to be available, and then the available PUCCH resources are determined according to the 9 symbols.
Optionally, the UE may need to exclude PUCCH resources that do not meet the minimum processing time when determining available PUCCH resources. If in the feedback slot 5 (the determination of the feedback slot 5 is determined according to the indication information in the DCI), it is necessary to feed back ACK/NACK of different data blocks transmitted by the base station in the slot 3 and the slot 4, however, part of the resources in the PUCCH resource set do not meet the minimum processing time of the UE, e.g., the minimum processing time required after the UE receives the PDSCH is 10 symbols, and the PDSCH scheduled by the base station for the UE in the slot 4 occupies the first 7 symbols of the 14 symbols, so the earliest starting symbol that the UE can feed back is the 4 th symbol in the slot 5. Therefore, the UE needs to exclude PUCCH resources occupying the first 3 symbols when determining available PUCCH resources.
Further, the UE needs to consider uplink Timing Advance (Timing Advance) when determining the earliest feedback time. When the uplink timing advance is not 0, the earliest starting symbol that the UE can feed back is not the 4 th symbol in slot 5, but the 5 th symbol or the 6 th symbol in slot 5, and the actual number of starting symbols depends on the value of the uplink timing advance.
After the UE determines available PUCCH resources, if more than 4 PUCCH resources exist, the UE determines the PUCCH resources according to ARI, the UE sorts the available PUCCH resources according to the transmission time sequence, then selects the PUCCH resources at corresponding positions according to the values indicated by the ARI, if different PUCCH resources start transmission from a first symbol and a second symbol … of a time slot in sequence, the UE sorts the PUCCH resources according to the transmission time sequence, if starting symbols of a plurality of PUCCH resources are the same, the PUCCH resources are sorted in sequence by taking the numbers in a PUCCH resource set as the reference, and then selects the PUCCH resources at corresponding positions according to the values indicated by the ARI, if the ARI is indicated as 10, the UE selects the 3 rd PUCCH resource from the sorted PUCCH resources as the PUCCH resource for transmitting HARQ feedback;
or sequencing the available PUCCH resources according to the transmission time length (namely the number of occupied symbols), then selecting the PUCCH resources at the corresponding positions according to the value indicated by the ARI, if the symbol numbers occupied by different PUCCH resources are different, sequencing the UE according to the transmission time length in sequence, if the transmission time lengths of a plurality of PUCCH resources are the same, sequencing the PUCCH resources in sequence by taking the serial number in the PUCCH resource set as the quasi-sequence, and then selecting the PUCCH resources at the corresponding positions according to the value indicated by the ARI as the PUCCH resources for transmitting HARQ feedback;
or sequencing the available PUCCH resources according to the sequence of transmission ending, then selecting the PUCCH resources at the corresponding positions according to the values indicated by the ARI, if the ending time of different PUCCH resources is different, some PUCCH resources need to be transmitted at the last symbol of a time slot, some PUCCH resources only need to occupy the first 7 symbols of the time slot, and the UE sequences the PUCCH resources in the corresponding positions according to the sequence of transmission ending, and then selecting the PUCCH resources at the corresponding positions as the PUCCH resources for transmitting HARQ feedback according to the values indicated by the ARI.
It should be noted that once the UE selects one of the implementation manners to select the PUCCH resource, the base station may also determine the PUCCH resource selected by the UE according to the same mechanism, so that the base station can smoothly solve the ACK/NACK information transmitted by the UE from the corresponding PUCCH resource.
An embodiment of the present invention further provides a device for determining HARQ feedback PUCCH resources, as shown in fig. 2, the device includes:
a first determining unit 11, configured to determine, on the determined feedback slot, a PUCCH resource set according to a bit size of HARQ ACK/NACK that needs to be fed back by the feedback slot;
a second determining unit 12, configured to determine available PUCCH resources from the PUCCH resource set;
a third determining unit 13, configured to determine, according to the ARI in the received DCI, a PUCCH resource for actually transmitting HARQ feedback from the available PUCCH resources.
According to the device for determining the HARQ feedback PUCCH resources, provided by the embodiment of the invention, after the PUCCH resource set is determined according to the bit number of the HARQ ACK/NACK needing to be fed back in the feedback time slot, the available PUCCH resources are determined from the PUCCH resource set at first, and then the PUCCH resources actually transmitting the HARQ feedback are determined from the available PUCCH resources according to the ARI, so that the successful determination of the HARQ feedback PUCCH resources can be ensured, and the UE can be ensured to perform HARQ feedback in time.
Optionally, the second determining unit 12 is configured to determine an available PUCCH resource according to the available uplink symbol of the feedback slot.
Optionally, the second determining unit 12 is configured to determine an available PUCCH resource according to a PUCCH resource in the feedback slot that meets the minimum processing time.
Optionally, the second determining unit 12 is configured to determine an available PUCCH resource according to a PUCCH resource in the feedback slot, where the PUCCH resource meets the minimum processing time and the uplink timing advance.
Optionally, the third determining unit 13 is configured to, when the maximum number of values that can be indicated by the ARI is greater than or equal to the determined number of available PUCCH resources, select a PUCCH resource corresponding to the value indicated by the ARI from the available PUCCH resources as a PUCCH resource for actually transmitting HARQ feedback.
Optionally, the third determining unit 13 is configured to, when the maximum number of values that can be indicated by the ARI is smaller than the determined number of available PUCCH resources, sort the available PUCCH resources according to the sequence of transmission times, and then select a PUCCH resource at a corresponding position according to the value indicated by the ARI; or sequencing the available PUCCH resources according to the transmission time length sequence, and then selecting the PUCCH resources at the corresponding positions according to the value indicated by the ARI; or sequencing the available PUCCH resources according to the sequence of the transmission end, then selecting the PUCCH resources at the corresponding positions according to the value indicated by the ARI, and taking the selected PUCCH resources as the PUCCH resources for actually transmitting the HARQ feedback.
The apparatus of this embodiment may be configured to implement the technical solutions of the above method embodiments, and the implementation principles and technical effects are similar, which are not described herein again.
The embodiment of the invention also provides the user equipment which comprises the device for determining the HARQ feedback PUCCH resource.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. A method for determining HARQ feedback PUCCH resources, comprising:
on the determined feedback time slot, determining a PUCCH resource set according to the bit number of HARQ ACK/NACK which needs to be fed back by the feedback time slot;
determining available PUCCH resources from the set of PUCCH resources;
according to the ARI in the received DCI, determining PUCCH resources for actually transmitting HARQ feedback from the available PUCCH resources;
the determining, according to the ARI in the received DCI, a PUCCH resource actually transmitting HARQ feedback from the available PUCCH resources includes:
when the maximum number of the values which can be indicated by the ARI is larger than or equal to the determined number of the available PUCCH resources, selecting the PUCCH resource corresponding to the value indicated by the ARI from the available PUCCH resources as the PUCCH resource for actually transmitting HARQ feedback;
when the maximum number of the values which can be indicated by the ARI is smaller than the number of the determined available PUCCH resources, sequencing the available PUCCH resources according to the sequence of transmission time, and then selecting the PUCCH resources at the corresponding positions according to the values indicated by the ARI; or sequencing the available PUCCH resources according to the transmission time length sequence, and then selecting the PUCCH resources at the corresponding positions according to the value indicated by the ARI; or sequencing the available PUCCH resources according to the sequence of the transmission end, then selecting the PUCCH resources at the corresponding positions according to the value indicated by the ARI, and taking the selected PUCCH resources as the PUCCH resources for actually transmitting the HARQ feedback.
2. The method of claim 1, wherein the determining available PUCCH resources from the set of PUCCH resources comprises: and determining available PUCCH resources according to the available uplink symbols of the feedback time slot.
3. The method according to claim 1 or 2, wherein the determining available PUCCH resources from the PUCCH resource set comprises: and determining available PUCCH resources according to the PUCCH resources meeting the minimum processing time in the feedback time slot.
4. The method of claim 3, wherein the determining available PUCCH resources based on the PUCCH resources satisfying the minimum processing time in the feedback slot comprises: and determining available PUCCH resources according to the PUCCH resources meeting the minimum processing time and the uplink timing advance in the feedback time slot.
5. An apparatus for determining HARQ feedback PUCCH resources, comprising:
a first determining unit, configured to determine, on the determined feedback time slot, a PUCCH resource set according to a bit size of HARQ ACK/NACK that needs to be fed back by the feedback time slot;
a second determining unit, configured to determine available PUCCH resources from the PUCCH resource set;
a third determining unit, configured to determine, according to the ARI in the received DCI, a PUCCH resource for actually transmitting HARQ feedback from the available PUCCH resources;
the third determining unit is further configured to select, when the maximum number of values that can be indicated by the ARI is greater than or equal to the determined number of available PUCCH resources, a PUCCH resource corresponding to the value indicated by the ARI from the available PUCCH resources as a PUCCH resource for actually transmitting HARQ feedback;
the third determining unit is further configured to, when the maximum number of values that can be indicated by the ARI is smaller than the determined number of available PUCCH resources, sort the available PUCCH resources according to the sequence of transmission times, and then select a PUCCH resource at a corresponding position according to the value indicated by the ARI; or sequencing the available PUCCH resources according to the transmission time length sequence, and then selecting the PUCCH resources at the corresponding positions according to the value indicated by the ARI; or sequencing the available PUCCH resources according to the sequence of the transmission end, then selecting the PUCCH resources at the corresponding positions according to the value indicated by the ARI, and taking the selected PUCCH resources as the PUCCH resources for actually transmitting the HARQ feedback.
6. The apparatus of claim 5, wherein the second determining unit is configured to determine an available PUCCH resource according to an uplink symbol available for the feedback slot.
7. The apparatus according to claim 5 or 6, wherein the second determining unit is configured to determine available PUCCH resources according to PUCCH resources satisfying a minimum processing time in the feedback slot.
8. The apparatus according to claim 5 or 6, wherein the second determining unit is configured to determine an available PUCCH resource according to a PUCCH resource that satisfies a minimum processing time and an uplink timing advance in the feedback slot.
9. A user equipment, characterized in that the user equipment comprises the means for determining HARQ feedback PUCCH resources according to any one of claims 5 to 8.
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