CN110557840A - method and equipment for activating semi-persistent scheduling hybrid automatic repeat request feedback - Google Patents
method and equipment for activating semi-persistent scheduling hybrid automatic repeat request feedback Download PDFInfo
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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
- 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
- H04L1/1829—Arrangements specially adapted for the receiver end
- H04L1/1848—Time-out mechanisms
- H04L1/1851—Time-out mechanisms using multiple timers
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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
- H04L5/0055—Physical resource allocation for ACK/NACK
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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- H04W72/20—Control channels or signalling for resource management
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Abstract
The application discloses a method for activating semi-persistent scheduling hybrid automatic repeat request feedback, which comprises the following steps: the physical downlink control channel comprises an indication for activating semi-static scheduling configuration; the physical downlink control channel also comprises a response time indication which is used for representing the relative time position between the first time interval and the second time interval; the length of the first time interval is K multiplied by T, wherein K is a natural number, T is a period of the semi-static scheduling configuration, and the length of the period is a downlink time unit; and the second time interval is used for feeding back HARQ-ACK information corresponding to the K physical downlink shared channels configured by the semi-persistent scheduling in the first time interval, and the length of the second time interval is one uplink time unit. The application also comprises the terminal equipment and the network equipment applying the method. The method and the device solve the problems of uneven coverage of the short-time response signal of the configuration period of the SPS scheduling and poor uplink channel multiplexing capability.
Description
Technical Field
the present application relates to the field of mobile communications technologies, and in particular, to a method and an apparatus for activating semi-persistent scheduling hybrid automatic repeat request feedback.
background
Semi-Persistent Scheduling (SPS), unlike dynamic Scheduling, in which physical downlink control information is transmitted to a terminal device (UE) once per PDSCH or PUSCH scheduled, allows a PDSCH or PUSCH resource to be periodically allocated to a specific terminal device through one physical downlink control channel Scheduling. A network device (e.g., a base station) specifies a radio resource (referred to herein as an SPS resource) used by a terminal device through a PDCCH, and the terminal device transmits or receives data using the SPS resource every one cycle. The base station does not need to issue the PDCCH to specify the allocated resources. Due to the 'one-time allocation and multiple-time use' characteristic of SPS scheduling, the PDCCH overhead is reduced. In the current system, at most one SPS is configured for the terminal equipment in one cell group, and the parameters of one SPS configuration comprise the period, the number of HARQ processes, PUCCH resources and the used MCS table.
The SPS configuration information is configured to the terminal equipment by the base station through RRC signaling. The minimum value of the period of the SPS configuration is 10 ms. After the terminal device receives the configuration information, the corresponding resource cannot be used immediately. Only after the base station activates the SPS configuration through the PDCCH, the terminal device receives or transmits data in the corresponding resource according to the period of the SPS configuration. And if the terminal equipment receives the indication that the base station releases the SPS configuration through the PDCCH, the terminal equipment stops receiving or sending data in the corresponding resources of the SPS configuration.
For a time sensitive network that needs to support services with low latency requirements, the service duration may not be an integer multiple of a symbol, a slot, or a subframe. The NR system supports a service type with a short configuration period for the terminal device. For example, the SPS support period is 2 symbols, 7 symbols, or 1 slot. After the SPS configuration is activated, the terminal equipment detects the PDSCH on the SPS configuration resource according to the period, and determines the time for feeding back the HARQ-ACK according to the time indicated by the PDCCH for activating the SPS configuration. Compared with the PDSCH corresponding to the SPS configuration, the SPS configuration period is different from the division mode of the uplink time slot carrying the HARQ-ACK. This may result in an uneven number of HARQ-ACKs being allocated in the uplink slot.
Disclosure of Invention
The application provides a method and equipment for activating semi-persistent scheduling hybrid automatic repeat request feedback, which solve the problems of uneven coverage of short-time response signals and poor uplink channel multiplexing capability of a configuration period of SPS scheduling.
The embodiment of the application provides a method for activating semi-persistent scheduling hybrid automatic repeat request feedback, which comprises the following steps:
The physical downlink control channel comprises an indication for activating semi-static scheduling configuration;
The physical downlink control channel also comprises a response time indication which is used for representing the relative time position between the first time interval and the second time interval;
The length of the first time interval is K multiplied by T, wherein K is a natural number, T is a period of the semi-static scheduling configuration, and the length of the period is a downlink time unit;
And the second time interval is used for feeding back HARQ-ACK information corresponding to the K physical downlink shared channels configured by the semi-persistent scheduling in the first time interval, and the length of the second time interval is one uplink time unit.
Preferably, the start point of the first time interval is located at the start point of the downlink time unit M, and satisfies:
(the number of downlink time units in each radio frame × system radio frame number + M) [ (the number of downlink time units in each radio frame × the initial effective radio frame number of semi-persistent scheduling + the initial effective downlink time unit number of semi-persistent scheduling) + N × K × T ] module (1024 × the number of downlink time units in each radio frame); wherein N is a positive integer.
Preferably, the length of the downlink time unit is an integer multiple of a downlink time slot or an integer multiple of a downlink sub-time slot; the length of the uplink time unit is integral multiple of the uplink time slot or integral multiple of the uplink sub time slot; the length of the downlink time unit is equal to the length of the uplink time unit, or the length of the downlink time unit is not equal to the length of the uplink time unit.
Further preferably, the response time indication represents a relative time position between an end point of the first period and a start point of the second period.
further preferably, the response time indication indicates a relative time position between an end point of the uplink time unit corresponding to the end point of the first period and a start point of the second period.
in any embodiment of the present application, further, the downlink control signaling further includes a value of K, which is used to determine the first period length.
In any embodiment of the present application, further, the second time period includes HARQ-ACK values respectively responded to K physical downlink shared channels.
In any embodiment of the present application, the second time period further includes HARQ-ACK values for K physical downlink shared channel bundling acknowledgements.
The method of the embodiment of the application is used for the terminal equipment and comprises the following steps:
Receiving the physical downlink control channel;
Determining the first time period and the second time period;
And receiving the physical downlink shared channel in a first time period, and sending HARQ-ACK information corresponding to the physical downlink shared channel in a second time period.
The method of the embodiment of the application is used for network equipment and comprises the following steps:
transmitting the physical downlink control channel;
And sending the physical downlink shared channel in the first period of time, and receiving HARQ-ACK information corresponding to the physical downlink shared channel in the second period of time.
the embodiment of the application also provides terminal equipment, and the method comprises a downlink receiving module, a downlink determining module and an uplink sending module.
and the downlink receiving module is used for receiving the physical downlink control channel and the physical downlink shared channel.
and the downlink determining module is configured to determine, according to the K, T value, K physical downlink shared channels in the first time period, and determine, according to the response time indication, a time position of a second time period.
And the uplink sending module is used for sending an automatic repeat request response in the second time interval.
The embodiment of the present application further provides a network device, which is used in the method according to any embodiment of the present application, and the network device includes an uplink receiving module, an uplink determining module, and a downlink sending module.
and the downlink sending module is used for sending the physical downlink control channel and the physical downlink shared channel.
And the uplink determining module is configured to determine, according to the K, T value, K physical downlink shared channels in the first time period, and determine, according to the response time indication, a position of a second time period.
And the uplink receiving module is used for receiving an automatic repeat request response in the second sub-time slot.
The embodiment of the application adopts at least one technical scheme which can achieve the following beneficial effects:
the invention solves the problem of how to determine the feedback resources corresponding to the HARQ-ACK under the condition of a smaller SPS period, aims to solve the problem that the coverage of a PUCCH channel is unbalanced in time and influences the performance and the efficiency of a system, and can enhance the transmission power efficiency of terminal equipment, enhance the channel multiplexing capability of the terminal equipment and improve the overall efficiency of the system.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a schematic diagram of SPS feedback when the uplink time unit and the downlink time unit are not equal in length;
FIG. 2 is a diagram illustrating SPS feedback when the length of the uplink time unit and the downlink time unit are equal and the SPS period is short;
FIG. 3 is a flow chart of an embodiment of the method of the present application;
FIG. 4 is a schematic diagram of an embodiment of the method of the present application in accordance with a first response time indication feedback;
FIG. 5 is a schematic diagram of an embodiment of the method of the present application indicating feedback according to a second response time;
FIG. 6 is a flowchart of an embodiment of a method of the present application for a terminal device;
FIG. 7 is a flowchart of an embodiment of a method of the present application for a network device;
fig. 8 is a schematic diagram of an embodiment of the apparatus of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, 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 application.
the technical solutions provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings.
For a service of a Time Sensitive Network (TSN), there are data streams with multiple periods and priority levels of urgency, and while supporting an aperiodic emergency service, the TSN needs to support a service with a low delay requirement. Traffic in a TSN network may not be an integer multiple of symbols, slots, or subframes. Therefore, the NR system will support a service type with a short configuration period for the terminal device. When the terminal equipment feeds back the HARQ-ACK based on the sub-time slot, the transmission of the downlink PDSCH is not restricted and is also based on the sub-time slot, so the downlink time slot is divided into virtual sub-time slots according to an uplink sub-time slot dividing mode. However, for the SPS configured PDSCH, the SPS configuration period and the uplink timeslot sub-slot division manner may be different. Assuming that the period length of the SPS configuration is T, dividing 1 downlink timeslot into a plurality of downlink time units (the length of the downlink time unit is T) with T as granularity; one uplink time slot is divided into a number of uplink time units. The length of the downlink time unit and the uplink time unit may be equal or unequal.
If the base station receives the PDCCH according to the SPS configuration in the time slot (or the sub-time slot) n, the terminal equipment feeds back the HARQ-ACK corresponding to the PDSCH in the time slot (or the sub-time slot) n + k.
If the HARQ-ACK is based on the time slot, the terminal equipment receives the PDSCH configured by the SPS in the time slot n, and the terminal equipment feeds back the HARQ-ACK corresponding to the PDSCH in the time slot n + k. The value of k is determined by a "PDSCH-to-HARQ-timing-indicator" field in the PDCCH, or by a higher layer signaling "dl-DataToUL-ACK". This field indicates that the value of k is one of a plurality of values configured for "dl-DataToUL-ACK" if the value of k is determined by "PDSCH-to-HARQ-timing-indicator" in the PDCCH.
if the HARQ-ACK is based on the sub-slot, the terminal equipment receives the last symbol of the PDSCH configured by the SPS and is positioned in the sub-slot n, and the terminal equipment feeds back the HARQ-ACK corresponding to the PDSCH in the sub-slot n + k. The value of k is determined by a "PDSCH-to-HARQ-timing-indicator" field in the PDCCH, or by a higher layer signaling "dl-DataToUL-ACK". This field indicates that the value of k is one of a plurality of values configured for "dl-DataToUL-ACK" if the value of k is determined by "PDSCH-to-HARQ-timing-indicator" in the PDCCH.
fig. 1 is a schematic diagram of SPS feedback when the lengths of uplink time units and downlink time units are not equal.
With SPS supporting very short period configurations, there are the following issues:
if the lengths of the downlink time unit and the uplink time unit are not equal, determining the HARQ-ACK feedback mode according to the "virtual" sub-slot (uplink time unit) where the last symbol of the PDSCH is located and the k value indicated by the DCI may cause the HARQ-ACK of the SPSPDSCH to be unbalanced in time, which affects the coverage performance of the PUCCH.
fig. 1 illustrates a case where the length of the downlink time unit is 2 symbols and the length of the uplink time unit is 7 symbols. And (3) under the assumption that the PDCCH for activating the SPS indicates that the time slot numbers of the uplink sub-time slot (virtual sub-time slot) corresponding to the last symbol of the PDSCH and the uplink sub-time slot for feeding back the HARQ-ACK of the PDSCH are different by 1, feeding back the HARQ-ACK of the SPS PDSCH (1), the SPSPDSCH (2) and the SPS PDSCH (3) on PUCCH-1, and feeding back the HARQ-ACK of the SPS PDSCH (4), the SPS PDSCH (5), the SPDSCH (6) and the SPS PDSCH (7) on PUCCH-2. The amount of HARQ-ACK information fed back on PUCCH-1 and PUCCH-2 is not uniform, so that the coverage of PUCCH channels is different at different times, and the system performance and efficiency are affected.
fig. 2 is a schematic diagram of SPS feedback when the length of the uplink time unit and the downlink time unit are equal and the SPS period is short.
With SPS supporting very short period configurations, there are also the following issues:
Fig. 2 is a case where the SPS configuration period is 2 symbols. Even if the length of the downlink time unit is equal to that of the uplink time unit, if the period of the SPS configuration is short, the transmission power efficiency of the PUCCH channel of the terminal device is low, and the channel multiplexing capability is poor, which affects the overall efficiency of the system.
When the period of the SPS configuration is short, if each SPS has the corresponding PUCCH resource for HARQ-ACK feedback, the PUCCH for feeding back the HARQ-ACK corresponding to the SPS PDSCH is very dense, but the HARQ-ACK information carried in each PUCCH is less. Therefore, the transmission power efficiency of the terminal equipment is very low, the channel multiplexing capability is poor, and the overall efficiency of the system is affected.
Fig. 3 is a flowchart of an embodiment of the method of the present application.
the embodiment of the application provides a method for activating semi-persistent scheduling hybrid automatic repeat request feedback, which comprises the following steps:
Step 101, a physical downlink control channel comprises an indication for activating semi-static scheduling configuration;
The SPS support period is 2 symbols, 7 symbols, or 1 slot. Taking the period of the SPS configuration as 2 symbols as an example, after the SPS configuration is activated, the terminal device detects the PDSCH on the SPS configuration resource with the period of 2 symbols, and determines the time for feeding back the HARQ-ACK of each SPS PDSCH according to the time indicated by the PDCCH activating the SPS configuration.
for example, DCI format 1_0 or DCI format 1_1 may be used to activate SPS configuration.
Step 102, the physical downlink control channel further includes a response time indication, which is used to indicate a relative time position between the first time period and the second time period;
the response time of the HARQ-ACK corresponding to the PDSCH transmitted according to the SPS configuration is indicated by DCI format 1_0 or DCI format 1_1 for activating the SPS configuration.
For the case of activating SPS configuration with DCI format 1_0, the DCI field includes "PDSCH-to-HARQ-timing-indicator" for indicating the value of k, which corresponds to 1 of {1,2,3,4,5,6,7,8 }.
For the case of activating SPS configuration with DCI format 1_1, if the higher layer signaling "dl-DataToUL-ACK" configures a plurality of values, a "PDSCH-to-HARQ-timing-indicator" field indicating that the value of k is one of the configured plurality of values of "dl-DataToUL-ACK" is included in DCI format 1_ 1; if only one value is configured for the higher layer signaling "dl-DataToUL-ACK", the "PDSCH-to-HARQ-timing-indicator" field is not included in the DCI format 1_1, and the value of k is the configured value for "dl-DataToUL-ACK".
step 103, determining the length and the position of a first time period;
The length of the first time interval is K multiplied by T, wherein K is a natural number, T is a period of the semi-static scheduling configuration, and the length of the period is a downlink time unit;
The starting point of the first time interval is positioned at the starting point of the downlink time unit M and satisfies the following conditions:
(number of downlink time units in each radio frame × system radio frame number + M) [ (number of downlink time units in each radio frame × initial effective radio frame number of semi-persistent scheduling + initial effective downlink time unit number of semi-persistent scheduling) + N × K × T ] module (1024 × number of downlink time units in each radio frame) (formula 1)
Where N is a positive integer, indicating that the start of the downlink time unit M is the start of the nth first time period since the semi-persistent scheduling configuration was activated.
If K is 1, since the length of the downlink time unit is defined as the length of the period of the semi-persistent scheduling, the start of the first period is located at the start of each downlink time unit M. The above definition of the starting point of the first period satisfies equation 1, the length of the first period is K × T, in order to "sum up" the PDSCHs of the SPS over K cycles to one channel feedback of the second period.
Step 104, determining the length and the position of a second time interval;
And the second time interval is used for feeding back HARQ-ACK information corresponding to the K physical downlink shared channels configured by the semi-persistent scheduling in the first time interval, and the length of the second time interval is one uplink time unit.
The response time indication represents a relative time position between an end point of the first period and a start point of the second period, or represents a relative time position between an end point of an uplink time unit corresponding to the end point of the first period and a start point of the second period.
preferably, the length of the downlink time unit is an integer multiple of a downlink time slot or an integer multiple of a downlink sub-time slot; the length of the uplink time unit is integral multiple of the uplink time slot or integral multiple of the uplink sub time slot; the length of the downlink time unit is equal to the length of the uplink time unit, or the length of the downlink time unit is not equal to the length of the uplink time unit.
The second time period is an uplink time unit. The uplink time unit is the time position granularity of the channel used to send the HARQ-ACK. Typically a time slot or a sub-slot. Within a certain uplink time unit, at most one channel matching the secondary uplink time unit is available for transmitting HARQ-ACK information.
fig. 4 is a schematic diagram of an embodiment of the method according to the present application for indicating feedback of the first response time.
and when the SPS configuration period is T, after the SPS configuration is activated, the terminal equipment detects PDSCHs on the SPS configuration resources by taking the T as the period, and determines the time for feeding back HARQ-ACK of each SPS PDSCH according to the time indicated by the PDCCH activating the SPS configuration. In the embodiment, the HARQ-ACKs corresponding to the PDSCH configured by SPS in the first period are all fed back on the same PUCCH in the second period. By configuring the length of the first time interval, the condition that the coverage ranges of PUCCH channels are different at different times can be avoided, the transmission power efficiency of the terminal equipment is enhanced, the channel multiplexing capability of the terminal equipment is enhanced, and the overall efficiency of the system is improved.
First, the downlink time unit includes 2 symbols (OS) and the uplink time unit includes 7 symbols. In the embodiment of fig. 4, it is assumed that the period T of the SPS configuration is 1 downlink time unit, and K is 4.
After acquiring the physical downlink control channel activating the SPS configuration, the terminal device detects the PDSCH of the SPS once every 2 symbols. The start of the first period is the start of the first downlink time unit of time slot n, and the length of the first period is 4 downlink time units.
The response time indication represents a relative time position between an end point of the first period and a start point of the second period. If the PDCCH activating the SPS configuration indicates how many uplink time units the difference between the end point of the first time period and the start point of the second time period is, assuming that the difference is 1 uplink time unit, and k is 1, then as shown in fig. 4, HARQ-ACKs corresponding to the PDSCH configured by the SPS configuration are dispersed in each PUCCH with the first time period as granularity, which can solve the problem that the coverage of the PUCCH channel affects system performance and efficiency differently at different times, and can enhance the transmission power efficiency of the terminal device, enhance the channel multiplexing capability of the terminal device, and improve the overall efficiency of the system.
Fig. 5 is a schematic diagram of an embodiment of the method according to the present application for indicating feedback of the second response time.
Further preferably, the response time indication indicates a relative time position between an end point of the uplink time unit corresponding to the end point of the first period and a start point of the second period.
the uplink time unit corresponding to the end point of the first period refers to which uplink time unit the end point of the first period is located if the downlink time slot is divided according to the uplink time unit. If the PDCCH activating the SPS configuration indicates how many uplink time units the difference between the end point of the uplink time unit where the end point of the first time period is located and the start point of the second time period is, assuming that the difference is 1 for a time unit, and k is 1, then as shown in fig. 5, HARQ-ACKs corresponding to the PDSCH configured by the SPS are dispersed in each PUCCH with the first time period length as a granularity, and the problem that the coverage range of the PUCCH channel affects system performance and efficiency differently at different times can also be solved, and the transmission power efficiency of the terminal device, the channel multiplexing capability of the terminal device and the overall efficiency of the system can be enhanced.
Fig. 6 is a flowchart of an embodiment of the method of the present application for a terminal device.
The method of the embodiment of the application is used for the terminal equipment and comprises the following steps:
Step 201, receiving the physical downlink control channel;
In step 201, a terminal device acquires a physical downlink control channel, where the physical downlink control channel is used to activate SPS configuration, and a period of the SPS configuration is T;
After receiving the SPS configuration, the terminal equipment activates the SPS configuration through the PDCCH and receives data in corresponding resources according to the SPS period.
the SPS configuration includes parameters such as the number of processes in the period T, HARQ, PUCCH resources, and MCS table used.
step 202, determining the first time period and the second time period;
The length of the first period is K T, and K is a natural number.
The starting point of the first time period is located at the starting point of the downlink time unit M and satisfies the formula (1).
the physical downlink control channel comprises a response time indication which is used for representing the time difference between the end point of the first time interval and the starting point of the second time interval; or, the physical downlink control channel indicates a time difference between an end point of an uplink time unit where the end point of the first time period is located and a start point of the second time period.
Preferably, the time difference is expressed by the number of uplink time units.
The uplink time unit is a time type of HARQ-ACK feedback, e.g., PUCCH.
Step 203, receiving the physical downlink shared channel in a first time period, and sending HARQ-ACK information corresponding to the physical downlink shared channel in a second time period.
the terminal equipment transmits a target HARQ-ACK in the starting point of the second time interval, wherein the target HARQ-ACK corresponds to the PDSCH of the SPS configuration in the first time interval.
for example, the second time interval includes HARQ-ACK values respectively responded to K physical downlink shared channels.
for another example, the second time period includes HARQ-ACK values for K physical downlink shared channel bundling acknowledgements.
in order to reduce the feedback burden of the HARQ-ACK information, the terminal device may transmit HARQ-ACK bundled information of each PDSCH in the first period in the starting point of the second period. The binding process may be, for example, an and logical operation. And when the HARQ-ACK of the PDSCH in the first time interval is ACK, the ACK is obtained after bundling. As long as one of the HARQ-ACKs of the PDSCH in the first period is NACK, the bundled HARQ-ACK is NACK.
Fig. 7 is a flowchart of an embodiment of the method of the present application for a network device.
The method of the embodiment of the application is used for network equipment and comprises the following steps:
Step 301, sending the physical downlink control channel;
and the base station configures SPS resources for the terminal equipment through RRC signaling. In this embodiment, the terminal device acquires a PDCCH for activating a semi-persistent scheduling configuration. Optionally, the PDCCH is scrambled with CS-RNTI.
Step 302, determining the first time period and the second time period;
The length of the first period is K T, and K is a natural number.
The starting point of the first time period is located at the starting point of the downlink time unit M and satisfies the formula (1).
The physical downlink control channel comprises a response time indication which is used for representing the time difference between the end point of the first time interval and the starting point of the second time interval; or, the physical downlink control channel indicates a time difference between an end point of an uplink time unit where the end point of the first time period is located and a start point of the second time period.
Preferably, the time difference is expressed by the number of uplink time units.
The uplink time unit is a time type of HARQ-ACK feedback, e.g., PUCCH.
In any embodiment of the present application, further optionally, the downlink control signaling further includes a value of K, which is used to determine the first period length. Optionally, the terminal device receives second information, where the second information is used to determine a value of K.
optionally, the value of K is included in the higher layer signaling.
As described above, the PDSCH configured by the SPS takes the first period length as the granularity, and the resources for feeding back the HARQ-ACK are located in the same PUCCH, so that it is possible to avoid that the coverage areas of PUCCH channels are different at different times, enhance the transmission power efficiency of the terminal device, enhance the channel multiplexing capability of the terminal device, and improve the overall efficiency of the system. The density of the PUCCHs used for the SPS configuration can be adjusted by configuring the length of the first period, and the number of HARQ-ACKs of the PDSCH of the SPS configuration on each PUCCH can be adjusted. The length of the first time interval can be adjusted according to the value of K. The value of K may be sent by the base station to the terminal device through the second information, and is used to determine a starting point of the second time period in which the PDSCH configured by the SPS corresponds to HARQ-ACK feedback.
Step 303, sending the physical downlink shared channel in the first period, and receiving HARQ-ACK information corresponding to the physical downlink shared channel in the second period.
Fig. 8 is a schematic diagram of an embodiment of the apparatus of the present application.
The embodiment of the present application further provides a terminal device 10, which includes a downlink receiving module 11, a downlink determining module 12, and an uplink sending module 13.
and the downlink receiving module is used for receiving the physical downlink control channel and the physical downlink shared channel.
And the downlink determining module is configured to determine, according to the K, T value, K physical downlink shared channels in the first time period, and determine, according to the response time indication, a time position of a second time period.
And the uplink sending module is used for sending an automatic repeat request response in the second time interval.
The embodiment of the present application further provides a network device 20, which is used in the method according to any embodiment of the present application, and includes an uplink receiving module 23, an uplink determining module 22, and a downlink sending module 21.
and the downlink sending module is used for sending the physical downlink control channel and the physical downlink shared channel.
And the uplink determining module is configured to determine, according to the K, T value, K physical downlink shared channels in the first time period, and determine, according to the response time indication, a position of a second time period.
and the uplink receiving module is used for receiving an automatic repeat request response in the second sub-time slot.
In any embodiment of the network device and the terminal device of the present application, the start point of the first time period is located at the start point of the downlink time unit M, and satisfies formula (1).
Preferably, the length of the downlink time unit is an integer multiple of a downlink time slot or an integer multiple of a downlink sub-time slot; the length of the uplink time unit is integral multiple of the uplink time slot or integral multiple of the uplink sub time slot; the length of the downlink time unit is equal to the length of the uplink time unit, or the length of the downlink time unit is not equal to the length of the uplink time unit.
The response time indication represents a relative time position between an end point of the first period and a start point of the second period, or represents a relative time position between an end point of an uplink time unit corresponding to the end point of the first period and a start point of the second period.
In any one of the embodiments of the network device and the terminal device, further, the downlink control signaling further includes a value of K, which is used to determine a length of the first period.
In any embodiment of the network device and the terminal device in the present application, further, the second time period includes HARQ-ACK values respectively responded to K physical downlink shared channels.
in any embodiment of the network device and the terminal device, the second time period further includes HARQ-ACK values for the K physical downlink shared channel bundling acknowledgements.
The method and the device can solve the problem that the coverage range of the PUCCH channel is different at different time to influence the performance and the efficiency of the system, and can enhance the sending power efficiency of the terminal device, enhance the channel multiplexing capability of the terminal device and improve the overall efficiency of the system.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
the present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (12)
1. A method for activating semi-persistent scheduling hybrid automatic repeat request feedback is disclosed,
The physical downlink control channel comprises an indication for activating semi-static scheduling configuration;
The physical downlink control channel also comprises a response time indication which is used for representing the relative time position between the first time interval and the second time interval;
The length of the first time interval is K multiplied by T, wherein K is a natural number, T is a period of the semi-static scheduling configuration, and the length of the period is a downlink time unit;
And the second time interval is used for feeding back HARQ-ACK information corresponding to the K physical downlink shared channels configured by the semi-persistent scheduling in the first time interval, and the length of the second time interval is one uplink time unit.
2. The method of claim 1,
the starting point of the first time interval is positioned at the starting point of the downlink time unit M and satisfies the following conditions:
(the number of downlink time units in each radio frame × system radio frame number + M) [ (the number of downlink time units in each radio frame × the initial effective radio frame number of semi-persistent scheduling + the initial effective downlink time unit number of semi-persistent scheduling) + N × K × T ] module (1024 × the number of downlink time units in each radio frame);
wherein N is a positive integer.
3. The method of claim 1,
The length of the downlink time unit is integral multiple of the downlink time slot or integral multiple of the downlink sub-time slot;
The length of the uplink time unit is integral multiple of the uplink time slot or integral multiple of the uplink sub time slot;
the length of the downlink time unit is equal to the length of the uplink time unit, or the length of the downlink time unit is not equal to the length of the uplink time unit.
4. The method of claim 3,
The response time indication represents a relative time position between an end point of the first period and a start point of the second period.
5. the method of claim 3,
The response time indication represents a relative time position between an end point of an uplink time unit corresponding to the end point of the first period and a start point of the second period.
6. The method according to any one of claims 1 to 5,
The downlink control signaling also comprises a value of K, which is used for determining the length of the first time period.
7. the method according to any one of claims 1 to 5,
And the second time interval comprises HARQ-ACK values respectively responded to the K physical downlink shared channels.
8. The method according to any one of claims 1 to 5,
and the second time interval comprises HARQ-ACK values of the binding response of the K physical downlink shared channels.
9. The method according to any of claims 1 to 8, for a terminal device,
receiving the physical downlink control channel;
Determining the first time period and the second time period;
And receiving the physical downlink shared channel in a first time period, and sending HARQ-ACK information corresponding to the physical downlink shared channel in a second time period.
10. the method according to any of claims 1 to 8, for a network device,
Transmitting the physical downlink control channel;
And sending the physical downlink shared channel in the first period of time, and receiving HARQ-ACK information corresponding to the physical downlink shared channel in the second period of time.
11. a terminal device, using the method of any one of claims 1 to 10, characterized by comprising a downlink receiving module, a downlink determining module, and an uplink sending module;
the downlink receiving module is configured to receive the physical downlink control channel and the physical downlink shared channel;
The downlink determining module is configured to determine, according to the K, T value, K physical downlink shared channels in the first time period, and determine, according to the response time indication, a time position of a second time period;
And the uplink sending module is used for sending an automatic repeat request response in the second time interval.
12. A network device, configured to perform the method according to any one of claims 1 to 10, and comprising an uplink receiving module, an uplink determining module, and a downlink sending module;
the downlink sending module is configured to send the physical downlink control channel and the physical downlink shared channel;
The uplink determining module is configured to determine, according to the K, T value, K physical downlink shared channels in the first time period, and determine, according to the response time indication, a position of a second time period;
And the uplink receiving module is used for receiving an automatic repeat request response in the second sub-time slot.
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