CN111385898B

CN111385898B - Method and device for receiving and sending DCI (Downlink control information) scheduled by multi-TTI (transmission time Interval) data, storage equipment, user terminal and network side

Info

Publication number: CN111385898B
Application number: CN201811622411.9A
Authority: CN
Inventors: 张飒; 沈兴亚
Original assignee: Beijing Ziguang Zhanrui Communication Technology Co Ltd
Current assignee: Beijing Ziguang Zhanrui Communication Technology Co Ltd
Priority date: 2018-12-28
Filing date: 2018-12-28
Publication date: 2022-09-27
Anticipated expiration: 2038-12-28
Also published as: CN111385898A

Abstract

A receiving method and a device of DCI (Downlink control information) scheduled by multi-TTI (transmission time interval), a storage device, a user terminal and a network side are disclosed, wherein the receiving method comprises the following steps: receiving DCI from a network side; determining a set of HARQ IDs, and selecting M HARQ IDs from the set of HARQ IDs as a HARQ ID subset for the first transmission of data, wherein a first HARQ ID in the HARQ ID subset is a HARQ ID corresponding to the first TTI; determining received data of a plurality of TTIs or data of a plurality of TTIs to be transmitted; and determining the HARQ ID corresponding to the data of each TTI according to the HARQ ID sequence in the HARQ ID subset. The scheme of the invention can obtain more HARQ IDs which are continuously scheduled, thereby reducing the control signaling overhead.

Description

DCI receiving and transmitting method and device for multi-TTI data scheduling, storage equipment, user terminal and network side

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for receiving and sending DCI for multi-TTI data scheduling, a storage device, a user terminal, and a network side.

Background

In the prior art, Hybrid Automatic Repeat reQuest (HARQ) is a technology combining Forward Error Correction (FEC) and Automatic Repeat reQuest (ARQ) methods. FEC adds redundant information to enable the information receiving end to correct a portion of errors, thereby reducing the number of retransmissions. For the error that the FEC cannot correct, the information receiving end will request the transmitting end to retransmit the data through the ARQ mechanism. The information receiving end uses an error detection code, usually a Cyclic Redundancy Check (CRC), to detect whether a received data packet is erroneous. If there is no error, the information receiving end will send a positive Acknowledgement (ACK) to the information sending end, and after the information sending end receives the ACK, it will send the next data packet. If the data packet is erroneous, the information receiving end discards the data packet and sends a Negative ACKnowledgement (NACK) to the information sending end, and the information sending end retransmits the same data after receiving the NACK.

In the prior art, for example, in LTE feLAA (heated Enhanced-Assisted Access) technology, one Downlink Control Information (DCI) may schedule a plurality of consecutive uplink subframes for first transmission of data, the number of the scheduled subframes is dynamically indicated by the DCI, the consecutive subframes use the same frequency domain resource, HARQ identity Information (identity) of the first scheduled subframe is indicated by the DCI, HARQ IDs of other subframes are consecutive and ascending, that is, HARQ IDs of a previous subframe are sequentially increased by 1.

However, in the above rule, HARQ IDs corresponding to scheduled Transmission Time Intervals (TTIs) are consecutive, and the scheduled TTIs are also consecutive, and in some cases, the number of HARQ IDs that can be continuously scheduled may be small.

There is a need for a DCI receiving method for multi-TTI data scheduling, which can obtain more HARQ IDs for continuous scheduling, thereby reducing the control signaling overhead.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a method and a device for receiving and sending DCI scheduled by multi-TTI data, a storage device, a user terminal and a network side, which can obtain more HARQ IDs scheduled continuously, thereby reducing the control signaling overhead.

In order to solve the above technical problem, an embodiment of the present invention provides a DCI receiving method for multi-TTI data scheduling, including the following steps: receiving DCI from a network side, wherein the DCI comprises the number M of TTIs for data scheduling and a HARQ ID corresponding to the first TTI; determining a set of HARQ IDs, and selecting M HARQ IDs from the set of HARQ IDs as a HARQ ID subset for the first transmission of data, wherein a first HARQ ID in the HARQ ID subset is a HARQ ID corresponding to the first TTI; determining received data of a plurality of TTIs or data of a plurality of TTIs to be transmitted; determining the HARQ ID corresponding to the data of each TTI according to the HARQ ID sequence in the HARQ ID subset; wherein M is a positive integer greater than or equal to 2.

Optionally, selecting M HARQ IDs from the set of HARQ IDs as the HARQ ID subset for the first data transmission includes: determining a preset offset; according to the preset offset and the HARQ ID corresponding to the first TTI, determining other M-1 HARQ IDs in the HARQ ID subset by adopting the following formula: the ith HARQ ID is (i-1 HARQ ID + preset offset) mod N; the number of the HARQ IDs in the HARQ ID set is represented by N, N is greater than or equal to 2 and is a positive integer, and i is greater than or equal to 2 and less than or equal to M.

Optionally, the DCI further includes an index value for indicating the preset offset; the determining the preset offset comprises: receiving a set of all offsets from the network side; and determining the preset offset in the set of all offsets according to the index value.

Optionally, selecting M HARQ IDs in the set of HARQ IDs as the HARQ ID subset for the first data transmission includes: receiving DFI information from the network side, and determining occupied HARQ ID according to the DFI information; and removing the occupied HARQ IDs from the set of HARQ IDs, and selecting M HARQ IDs as the HARQ ID subsets for the first transmission of data according to an ID ascending cyclic sequence by taking the HARQ ID corresponding to the first TTI as a first HARQ ID in the rest HARQ IDs.

Optionally, determining the received data of multiple TTIs or the data of multiple TTIs to be transmitted includes: determining a preset TTI offset; and determining other TTI IDs by adopting the following formula according to the preset TTI offset and the first TTI ID: the 1 st TTI ID is the TTI ID + K0 where the DCI is located; or, the 1 st TTI ID is the TTI ID + K2 where the DCI is located; the ith TTI ID is the ith-1 TTI ID plus the preset TTI offset; determining data received or to-be-transmitted at each TTI ID according to the corresponding relation between the data of the plurality of TTIs and the TTI ID; the K0 is used for representing the time interval of the PDSCH and the PDCCH, the K2 is used for representing the time interval of the PUSCH and the PDCCH, N is more than or equal to 2 and is a positive integer, and i is more than or equal to 2 and less than or equal to M.

Optionally, the DCI further includes a TTI index value for indicating the preset TTI offset; the determining the preset TTI offset comprises: receiving a set of all TTI offsets from the network side; and determining the preset TTI offset in the set of all TTI offsets according to the TTI index value.

To solve the above technical problem, an embodiment of the present invention provides a method for sending DCI for multi-TTI data scheduling, including the following steps: determining a set of HARQ IDs, and selecting M HARQ IDs from the set of HARQ IDs as a HARQ ID subset for the first transmission of data, wherein a first HARQ ID in the HARQ ID subset is a HARQ ID corresponding to a first TTI; determining the number M of TTIs for data scheduling; determining received data of a plurality of TTIs or data of a plurality of TTIs to be transmitted; determining the HARQ ID corresponding to the data of each TTI according to the HARQ ID sequence in the HARQ ID subset; configuring DCI, wherein the DCI comprises the number M of the TTIs and the HARQ ID corresponding to the first TTI; and sending the DCI to a user terminal.

Optionally, selecting M HARQ IDs from the set of HARQ IDs as the HARQ ID subset for the first data transmission includes: determining a preset offset; determining other M-1 HARQ IDs in the HARQ ID subset by adopting the following formula according to the preset offset and the HARQ ID corresponding to the first TTI: the ith HARQ ID is (i-1 HARQ ID + preset offset) mod N; the number N is used for representing the number of the HARQ IDs in the set of the HARQ IDs, N is larger than or equal to 2 and is a positive integer, and i is larger than or equal to 2 and smaller than or equal to M.

Optionally, the DCI further includes an index value for indicating the preset offset; the determining the preset offset comprises: determining a set of all offsets and an index value of the preset offset; and determining the preset offset in the set of all offsets according to the index value.

Optionally, selecting M HARQ IDs in the set of HARQ IDs as the HARQ ID subset for the first data transmission includes: receiving UCI information from the user terminal, and determining an occupied HARQ ID according to the UCI information; and removing the occupied HARQ IDs from the set of HARQ IDs, and selecting M HARQ IDs as the HARQ ID subsets for the first transmission of data according to an ID ascending cyclic sequence by taking the HARQ ID corresponding to the first TTI as a first HARQ ID in the rest HARQ IDs.

Optionally, determining the received data of multiple TTIs or the data of multiple TTIs to be sent includes: determining a preset TTI offset; and determining other TTI IDs by adopting the following formula according to the preset TTI offset and the first TTI ID: the 1 st TTI ID is the TTI ID + K0 where the DCI is located; or, the 1 st TTI ID is the TTI ID + K2 where the DCI is located; the ith TTI ID is the ith-1 TTI ID plus the preset TTI offset; determining data received or to-be-transmitted at each TTI ID according to the corresponding relation between the data of the plurality of TTIs and the TTI ID; the K0 is used for representing the time interval between the PDSCH and the PDCCH, the K2 is used for representing the time interval between the PUSCH and the PDCCH, N is not less than 2 and is a positive integer, and i is not less than 2 and not more than M.

Optionally, the DCI further includes an index value for indicating the preset TTI offset; the determining the preset TTI offset comprises: determining a set of all TTI offsets and index values of the preset TTI offsets; and determining the preset TTI offset in the set of all TTI offsets according to the TTI index value.

To solve the foregoing technical problem, an embodiment of the present invention provides a DCI receiving device for multi-TTI data scheduling, including: the DCI receiving module is suitable for receiving DCI from a network side, wherein the DCI comprises the number M of TTIs used for data scheduling and a HARQ ID corresponding to the first TTI; a first subset determining module, adapted to determine a set of HARQ IDs, and select M HARQ IDs from the set of HARQ IDs as a HARQ ID subset for a first transmission of data, where a first HARQ ID in the HARQ ID subset is a HARQ ID corresponding to the first TTI; the first data determining module is suitable for determining received data of a plurality of TTIs or data of a plurality of TTIs to be sent; the first corresponding relation determining module is suitable for determining the HARQ ID corresponding to the data of each TTI according to the HARQ ID sequence in the HARQ ID subset; wherein M is a positive integer greater than or equal to 2.

To solve the foregoing technical problem, an embodiment of the present invention provides a DCI transmitting device for multi-TTI data scheduling, including: a second subset determining module, adapted to determine a set of HARQ IDs, and select M HARQ IDs from the set of HARQ IDs as a HARQ ID subset for first data transmission, where a first HARQ ID in the HARQ ID subset is a HARQ ID corresponding to a first TTI; a number determination module adapted to determine a number M of TTIs for data scheduling; the second data determination module is suitable for determining received data of a plurality of TTIs or data of a plurality of TTIs to be transmitted; the second corresponding relation determining module is suitable for determining the HARQ ID corresponding to the data of each TTI according to the HARQ ID sequence in the HARQ ID subset; a DCI configuration module, adapted to configure DCI, where the DCI includes the number M of TTIs and a HARQ ID corresponding to the first TTI; and the DCI sending module is suitable for sending the DCI to the user terminal.

In order to solve the above technical problem, an embodiment of the present invention provides a storage medium having stored thereon computer instructions, where the computer instructions are executed to perform the steps of the receiving method of DCI of multi-TTI data scheduling or the steps of the transmitting method of DCI of multi-TTI data scheduling.

In order to solve the foregoing technical problem, an embodiment of the present invention provides a user terminal, including a memory and a processor, where the memory stores computer instructions capable of being executed on the processor, and the processor executes the steps of the receiving method of DCI scheduled by multiple TTIs when executing the computer instructions.

In order to solve the foregoing technical problem, an embodiment of the present invention provides a network side, including a memory and a processor, where the memory stores computer instructions capable of being executed on the processor, and the processor executes the step of transmitting DCI scheduled by multi-TTI data scheduling when executing the computer instructions.

Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:

in the embodiment of the present invention, by determining the set of HARQ IDs and selecting M HARQ IDs in the set of HARQ IDs as the HARQ ID subset for the first data transmission, when some HARQ IDs are occupied and the number of HARQ IDs capable of being continuously scheduled is small, schedulable HARQ IDs are determined according to the HARQ ID sequence in the HARQ ID subset, so that there is an opportunity to obtain more HARQ IDs capable of being continuously scheduled, thereby reducing the control signaling overhead.

Further, in the embodiment of the present invention, by determining a preset offset and determining a schedulable HARQ ID according to the preset offset, there is a chance to select only an unoccupied HARQ ID in the offset process, which is equivalent to obtaining more HARQ IDs for continuous scheduling, thereby reducing the control signaling overhead.

Further, in the embodiment of the present invention, by receiving DFI information from the network side and determining the occupied HARQ IDs according to the DFI information, it can be determined which HARQ IDs are occupied, and then only select the unoccupied HARQ IDs, which is equivalent to obtaining more HARQ IDs for continuous scheduling, thereby reducing the control signaling overhead.

Further, in the implementation of the present invention, by determining the offset of the preset TTI and determining the data received or to be transmitted in each TTI ID according to the offset of the preset TTI, the corresponding relationship between the data received in each TTI and the HARQ ID can be more accurately determined, thereby further reducing the control signaling overhead.

Drawings

Fig. 1 is a schematic diagram of a downlink scheduling time indication in the prior art;

fig. 2 is a schematic diagram of an uplink scheduling time indication in the prior art;

fig. 3 is a flowchart of a DCI receiving method for multi-TTI data scheduling according to an embodiment of the present invention;

FIG. 4 is a flowchart of one embodiment of step S32 of FIG. 3;

FIG. 5 is a flowchart of another embodiment of step S32 of FIG. 3;

FIG. 6 is a partial flowchart of another DCI receiving method for multi-TTI data scheduling according to an embodiment of the present invention;

fig. 7 is a schematic diagram of a downlink scheduling time indication according to an embodiment of the present invention;

fig. 8 is a flowchart of a DCI transmission method according to multi-TTI data scheduling in an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of a DCI receiving apparatus for multi-TTI data scheduling in an embodiment of the present invention;

fig. 10 is a schematic structural diagram of a DCI transmitting apparatus for multi-TTI data scheduling according to an embodiment of the present invention.

Detailed Description

In the prior art, one piece of downlink control information DCI may schedule multiple consecutive uplink subframes, the number of the scheduled subframes is dynamically indicated by the DCI, the consecutive subframes use the same frequency domain resource, the HARQ ID of the first scheduled subframe is indicated by the DCI, and the HARQ IDs of other subframes are consecutive and ascending, that is, 1 is successively added to the HARQ ID of the previous subframe.

Referring to fig. 1, fig. 1 is a schematic diagram of a downlink scheduling time indication in the prior art.

In the 5G NR, units of K0 and K1 are slots (slots), K0 represents a time interval between a Physical Downlink Shared Channel (PDSCH) and a Physical Downlink Control Channel (PDCCH), the PDSCH is used for transmitting Downlink data, and the PDCCH is used for transmitting DCI. K1 is used to indicate the time interval between HARQ-ACK feedback and PDSCH.

As shown in FIG. 1, K0 may be 1 slot and K1 may be 3 slots.

Referring to fig. 2, fig. 2 is a schematic diagram of an uplink scheduling time indication in the prior art.

In 5G NR, K2 is a time slot, and K2 denotes a time interval between a Physical Uplink Shared Channel (PUSCH) for transmitting Uplink data and a PDCCH for transmitting DCI.

As shown in fig. 2, K2 may be 3 slots.

Further, unlike LTE feLAA, NR supports HARQ-ACK for feeding back downlink data in an unlicensed band. Because Listen Before Talk (LBT) is required Before the channel is preempted in the unlicensed band, the channel can be occupied only after the LBT succeeds, and then data is sent, otherwise, the data cannot be sent, and the feedback time of HARQ-ACK of downlink data is uncertain due to the characteristic.

Further, due to the uncertainty of the unlicensed frequency band, if the feedback HARQ-ACK and the transmitted data are not in a Channel Occupancy Time (COT), the K1 may indicate a flexible Time instead of a specific Time.

In order to reduce the feedback delay of HARQ-ACK and reduce the influence of LBT uncertainty, NR-U makes HARQ-ACK of downlink data and downlink data sent in the same COT as much as possible (LBT may not be done at this time), but due to the limitation of UE processing time capability, some downlink data may not be fed back in the same COT. For these data, its HARQ-ACK needs to be fed back at a different COT from the downlink data transmission.

Further, in the FeLAA, an adaptive uplink Up-Link (AUL) downlink feedback information (AUL-DFI) is defined to feed back data of the AUL, and one bitmap (bitmap) is used to feed back all HARQ IDs in the AUL-DFI.

The inventors of the present invention have studied and found that, in the above rule, harq ids corresponding to scheduled transmission time intervals TTI are consecutive. It should be noted that the meaning of the HARQ ID continuation may include that the HARQ ID continuation is circularly continued in an ascending order, and the ascending order is continuously used to indicate that after the largest HARQ ID is selected, the smallest HARQ ID may be circularly used to continue the selection. Here, it is explained that the total number of HARQ ids available for dynamic scheduling is 8, and the HARQ numbers are 0,1,2, …, and 7, respectively, so the HARQ id corresponding to the scheduled TTI may be 0,1,2, …, and 7, or may be 3,4, …,7,1, and 2, or may be 6,7,1,2 …, and 5.

Further, the scheduled TTIs are also consecutive, e.g. the TTI IDs are also in ascending order.

In some cases where HARQ IDs are occupied, for example, when decoding errors occur in data corresponding to HARQ IDs 1,5, and retransmission needs to be scheduled, the number of HARQ IDs for the first transmission of data that can be continuously scheduled is 2,3,4, or 6,7,0, resulting in the number of HARQ IDs that can be continuously scheduled being within 3, and if more HARQ IDs need to be scheduled for the first transmission of data, multiple DCIs need to be used for scheduling.

In the embodiment of the present invention, by determining the set of HARQ IDs and selecting M HARQ IDs in the set of HARQ IDs as the HARQ ID subset for first data transmission, schedulable HARQ IDs may be determined according to the HARQ ID sequence in the HARQ ID subset when some HARQ IDs are occupied and the number of HARQ IDs that can be continuously scheduled is small, so that more HARQ IDs that can be continuously scheduled may be obtained, thereby reducing control signaling overhead.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

Referring to fig. 3, fig. 3 is a flowchart of a receiving method of DCI for multi-TTI data scheduling according to an embodiment of the present invention. The DCI receiving method may include steps S31 to S34:

step S31: receiving DCI from a network side, wherein the DCI comprises the number M of TTIs for data scheduling and a HARQ ID corresponding to the first TTI;

step S32: determining a set of HARQ IDs, and selecting M HARQ IDs from the set of HARQ IDs as a HARQ ID subset for data first transmission, wherein a first HARQ ID in the HARQ ID subset is a HARQ ID corresponding to the first TTI;

step S33: determining received data of a plurality of TTIs or data of a plurality of TTIs to be transmitted;

step S34: and determining the HARQ ID corresponding to the data of each TTI according to the HARQ ID sequence in the HARQ ID subset.

Wherein M is not less than 2 and is a positive integer.

In the specific implementation of step S31, the UE receives DCI from the network side, and may determine that M HARQ IDs need to be selected according to the number M of TTIs used for data scheduling included in the DCI; and determining a first HARQ ID of the M HARQ IDs according to a HARQ ID corresponding to a first TTI included in the DCI.

In a specific implementation of step S32, the UE selects M HARQ IDs from the set of HARQ IDs as a HARQ ID subset for a first transmission of data, wherein the first transmission data is used for distinguishing from retransmission data.

Since the HARQ ID is selected in a continuous selection manner in the prior art, in the embodiment of the present invention, the set of HARQ IDs for the first transmission of data may be different from that in the prior art by selecting M HARQ IDs to form the HARQ ID subset.

Further, in a specific implementation manner of the embodiment of the present invention, the step of selecting M HARQ IDs in the set of HARQ IDs as the HARQ ID subset for the first data transmission may be determined according to a preset offset and the HARQ ID corresponding to the first TTI.

Referring to fig. 4, fig. 4 is a flowchart of an embodiment of step S32 in fig. 3. The step of selecting M HARQ IDs in the set of HARQ IDs as the HARQ ID subset for the first transmission of data may include steps S41 to S43, each of which is described below.

In step S41, a set of all offsets is received from the network side.

In particular, the set of all offsets may be received from the network side through higher layer signaling.

Wherein the offset may be pre-configured by the network side. As a non-limiting example, the set of all offsets may be configured as {1,2,3,4 }.

In step S42, the DCI further includes an index value indicating the preset offset, and the preset offset is determined in the set of all offsets according to the index value.

Specifically, since the index value is used to indicate the preset offset, the index value and each element in the set of all offsets may have a corresponding relationship, for example, an index value of 01 may be used to indicate that the preset offset is 2.

It should be noted that, in the embodiment of the present invention, the preset offset may also be determined in other manners, for example, all the offsets are predefined to be a fixed single value.

Further, the number of bits occupied by the index value may be determined in various ways.

In a specific embodiment, the number of bits of the index value may be specified as a preset value, for example, 2 bits, by a standard.

In another specific embodiment, the bit number of the index value may be configured as a preset value through high-level signaling, for example, 2 bits.

In another specific embodiment, the number of bits occupied by the index value may be determined according to the number of sets of all offsets configured by the higher layer signaling, for example, the number of sets of all offsets configured by the higher layer signaling is N, and the required number of bits is N

In the specific implementation, the number of the elements is 4, which can be determined according to

The number of bits is determined to be 2 bits. Further, 00 may be used to indicate that the higher layer signaling configures the first element in the set of all offsets, 01 to indicate that the higher layer signaling configures the second element in the set of all offsets, 10 to indicate that the higher layer signaling configures the third element in the set of all offsets, and 11 to indicate that the higher layer signaling configures the fourth element in the set of all offsets.

In step S43, according to the preset offset and the HARQ ID corresponding to the first TTI, a formula is used to determine other M-1 HARQ IDs in the HARQ ID subset.

Specifically, the following formula may be employed to determine the other M-1 HARQ IDs in the HARQ ID subset: the ith HARQ ID is (i-1 HARQ ID + preset offset) mod N;

the number N is used for representing the number of the HARQ IDs in the set of the HARQ IDs, N is larger than or equal to 2 and is a positive integer, and i is larger than or equal to 2 and smaller than or equal to M.

In the embodiment of the invention, the ascending circular continuation of the HARQ IDs can be realized by setting the complementation operation on the total number of the HARQ IDs which can be used for dynamic scheduling, and after the ascending circular continuation is used for indicating the selection of the largest HARQ ID, the smallest HARQ ID can be circulated back to continue circular selection. Here, the total number of HARQ IDs available for dynamic scheduling is 8, the preset offset is 2, and the first HARQ ID is 4. The HARQ ID of the 1 st scheduled TTI is 4, the HARQ ID of the 2 nd scheduled TTI is 6, the HARQ ID of the 3 rd scheduled TTI is 0, and the HARQ ID of the 4 th scheduled TTI is 2.

It should be noted that in some cases where HARQ IDs are occupied, for example, when decoding of data corresponding to HARQ IDs 1,5 is erroneous, retransmission needs to be scheduled, in the prior art, the number of HARQ IDs used for first transmission of data can be continuously scheduled to be 2,3,4, or 6,7,0, resulting in the number of HARQ IDs that can be continuously scheduled to be within 3, however, in the embodiment of the present invention, the number of HARQ IDs that can be continuously scheduled can be 4,6,0,2, that is, the number of HARQ IDs that can be continuously scheduled can be 4, which is more than the scheme in the prior art.

In the embodiment of the invention, by determining the preset offset and determining the schedulable HARQ ID according to the preset offset, only the unoccupied HARQ ID is selected in the offset process, which is equivalent to obtaining more continuously scheduled HARQ IDs, thereby reducing the control signaling overhead.

With continued reference to fig. 3, in another specific implementation of step S32, the step of selecting M HARQ IDs in the set of HARQ IDs as the HARQ ID subset for the first transmission of data may be determined according to DFI information received from the network side.

Referring to fig. 5, fig. 5 is a flowchart of another specific implementation of step S32 in fig. 3. The step of selecting M HARQ IDs from the set of HARQ IDs as the HARQ ID subset for the first transmission of data may include step S51 and step S52, and each step is explained below.

In step S51, DFI information is received from the network side, and an occupied HARQ ID is determined according to the DFI information.

In specific implementation, the network side informs the UE of which HARQ IDs are occupied through physical layer signaling (e.g., DFI information), for example, which HARQ IDs correspond to data decoding errors, so that the UE can determine the unusable HARQ IDs.

In step S52, the occupied HARQ IDs are removed from the set of HARQ IDs, and of the remaining HARQ IDs, the HARQ ID corresponding to the first TTI is used as the first HARQ ID, and M HARQ IDs are selected as the HARQ ID subset for the first data transmission according to the ascending ID cycle order.

It should be noted that, after the ID ascending circular sequence is used to indicate that the largest HARQ ID is selected, the circular selection can be continued by cycling back to the smallest HARQ ID. Here, the total number of HARQ IDs available for dynamic scheduling is 8, and the first HARQ ID is 4.

For example, when data decoding errors occur in HARQ processes 1 and 5, and retransmission needs to be scheduled, in the prior art, the number of HARQ IDs that can be continuously scheduled is 2,3,4, or 6,7,0, resulting in that the number of HARQ IDs that can be continuously scheduled is within 3, however, in the embodiment of the present invention, the number of HARQ IDs that can be continuously scheduled may be 4,6,7,0,2,3, that is, the number of HARQ IDs that can be continuously scheduled may be up to 6, there is an opportunity to make it larger than the scheme in the prior art by selecting M HARQ IDs from the 6 HARQ IDs, for example, setting M to 4.

In the embodiment of the invention, the DFI information is received from the network side, and the occupied HARQ ID is determined according to the DFI information, so that which HARQ IDs are occupied can be determined, and only the unoccupied HARQ ID is selected, which is equivalent to obtaining more HARQ IDs which are continuously scheduled, thereby reducing the control signaling overhead.

With continued reference to fig. 3, the UE determines data for multiple TTIs received or data for multiple TTIs to be transmitted.

In specific implementation, when the UE serves as a receiving end, it needs to determine when to receive data, that is, it needs to determine a TTI ID, and then receive data at the TTI ID; when the UE is used as a transmitting end, it needs to determine when to transmit data, that is, it needs to determine a TTI ID, and then transmit data in the TTI ID.

Referring to fig. 6, fig. 6 is a partial flowchart of another DCI receiving method for multi-TTI data scheduling according to an embodiment of the present invention. The step of determining the data of the received multiple TTIs or the data of the multiple TTIs to be transmitted may include steps S61 to S63, and the respective steps are explained below.

In step S61, the UE receives a set of all TTI offsets from the network side.

In particular, the set of all TTI offsets may be received from the network side through higher layer signaling.

Wherein the TTI offset may be preconfigured by the network side. As a non-limiting example, the set of all TTI offsets can be configured as {1,2 }.

In step S62, the preset TTI offset is determined from the set of all TTI offsets according to the TTI index value.

Specifically, since the TTI index value is used to indicate the preset TTI offset, the TTI index value may have a corresponding relationship with each element in the set of all TTI offsets, for example, a TTI index value of 0 may be used to indicate that the preset TTI offset is 1, and a TTI index value of 1 may be used to indicate that the preset TTI offset is 2.

It should be noted that, in the embodiment of the present invention, the preset offset may also be determined in other manners, for example, the TTI offset may be predefined to default to 1.

Further, the number of bits occupied by the TTI index value may be determined in a variety of ways.

In a specific embodiment, the number of bits of the TTI index value may be specified as a preset value, for example, 1 bit, by a standard.

In another specific embodiment, the bit number of the TTI index value may be configured to be a preset value, for example, 1 bit, through high-level signaling.

In another specific embodiment, the number of bits occupied by the TTI index value may be determined according to the number of sets of all TTI offsets configured by higher layer signaling, for example, the number of sets of all TTI offsets configured by higher layer signaling is Y, and the required number of bits is Y

In step S63, according to the preset TTI offset and the first TTI ID, the following formula is used to determine other TTI IDs:

the 1 st TTI ID is the TTI ID + K0 where the DCI is located; or, the 1 st TTI ID is the TTI ID + K2 where the DCI is located;

the ith TTI ID is the ith-1 TTI ID plus the preset TTI offset;

it should be noted that, when the scheduled data is downlink data in this embodiment, the 1 st TTI ID is the TTI ID + K0 where the DCI is located; when the scheduled data is uplink data in this embodiment, the 1 st TTI ID is the TTI ID where the DCI is located + K2.

Referring to fig. 7, fig. 7 is a schematic diagram of a downlink scheduling time indication in the embodiment of the present invention.

In 5G NR, the unit of K0 is a slot, K0 may be 1 slot, and K0 indicates a time interval between a PDSCH for transmitting downlink data and a PDCCH for transmitting DCI.

As shown in fig. 7, the TTI for transmitting DCI is the TTI ID where DCI is located, and the 1 st TTI ID of the PDSCH for transmitting downlink data is TTI ID + K0 where DCI is located; the 2 nd TTI ID of the PDSCH for transmitting downlink data is the 1 st TTI ID + the preset TTI offset.

With continued reference to fig. 6, in step S64, the data received or to be transmitted at each TTI ID is determined according to the correspondence between the data of the plurality of TTIs and the TTI ID.

The K0 is used for representing the time interval of the PDSCH and the PDCCH, the K2 is used for representing the time interval of the PUSCH and the PDCCH, N is more than or equal to 2 and is a positive integer, and i is more than or equal to 2 and less than or equal to M.

In the implementation of the invention, the corresponding relation between the data received in each TTI and the HARQ ID can be more accurately determined by determining the preset TTI offset and determining the data received in each TTI ID or the data to be sent according to the preset TTI offset, thereby further reducing the control signaling overhead.

Referring to fig. 8, fig. 8 is a flowchart of a DCI transmission method for multi-TTI data scheduling according to an embodiment of the present invention. The method for transmitting DCI in multi-TTI data scheduling may include steps S81 to S86, and each step is described below.

In step S81, a set of HARQ IDs is determined, and M HARQ IDs are selected from the set of HARQ IDs as a HARQ ID subset for the first transmission of data, where a first HARQ ID in the HARQ ID subset is a HARQ ID corresponding to the first TTI.

In a specific implementation, more details regarding step S81 are described with reference to step S12 in fig. 1, and are not described herein again.

In step S82, the number M of TTIs used for data scheduling is determined.

In a specific implementation, the number M of TTIs used for data scheduling may be determined by the network side.

In step S83, data for a plurality of TTIs received or data for a plurality of TTIs to be transmitted is determined.

In the embodiment, more details about step S83 are described with reference to step S13 in fig. 1, and are not described herein again.

In step S84, determining an HARQ ID corresponding to data of each TTI according to an HARQ ID sequence in the HARQ ID subset;

in a specific implementation, more details regarding step S84 are described with reference to step S14 in fig. 1, and are not described herein again.

In step S85, DCI is configured, where the DCI includes the number M of TTIs and the HARQ ID corresponding to the first TTI.

In step S86, the DCI is transmitted to the user terminal.

In the embodiment of the present invention, by determining a set of HARQ IDs, and configuring and sending DCI to the UE, where the DCI includes the number M of TTIs and the HARQ ID corresponding to the first TTI, the UE may determine schedulable HARQ IDs according to the HARQ ID sequence in the HARQ ID subset when some HARQ IDs are occupied and the number of HARQ IDs that can be continuously scheduled is small, so that the UE may obtain more HARQ IDs that can be continuously scheduled, thereby reducing control signaling overhead.

Further, selecting M HARQ IDs in the set of HARQ IDs as a subset of HARQ IDs for a first transmission of data may include: determining a preset offset; determining other M-1 HARQ IDs in the HARQ ID subset by adopting the following formula according to the preset offset and the HARQ ID corresponding to the first TTI:

the ith HARQ ID is (i-1 th HARQ ID + preset offset) mod N;

Further, the DCI may further include an index value used to indicate the preset offset; the determining the preset offset may include: determining a set of all offsets and index values of the preset offsets; and determining the preset offset in the set of all offsets according to the index value.

Further, selecting M HARQ IDs in the set of HARQ IDs as a subset of HARQ IDs for a first transmission of data may include: receiving UCI information from the user terminal, and determining an occupied HARQ ID according to the UCI information; and removing the occupied HARQ IDs from the set of HARQ IDs, and selecting M HARQ IDs as the HARQ ID subsets for the first transmission of data according to an ID ascending cyclic sequence by taking the HARQ ID corresponding to the first TTI as a first HARQ ID in the rest HARQ IDs.

Further, determining data for a plurality of TTIs received or data for a plurality of TTIs to be transmitted may include: determining a preset TTI offset; and determining other TTI IDs by adopting the following formula according to the preset TTI offset and the first TTI ID:

the 1 st TTI ID is the TTI ID where the DCI is located + K0; or, the 1 st TTI ID is the TTI ID + K2 where the DCI is located;

the ith TTI ID is the ith-1 TTI ID plus the preset TTI offset;

determining data received or to-be-transmitted at each TTI ID according to the corresponding relation between the data of the plurality of TTIs and the TTI ID; the K0 is used for representing the time interval between the PDSCH and the PDCCH, the K2 is used for representing the time interval between the PUSCH and the PDCCH, N is not less than 2 and is a positive integer, and i is not less than 2 and not more than M.

Further, the DCI may further include an index value for indicating the preset TTI offset; the determining the preset TTI offset may include: determining a set of all TTI offsets and index values of the preset TTI offsets; and determining the preset TTI offset in the set of all TTI offsets according to the TTI index value.

In a specific implementation, please refer to the related descriptions of the receiving method of the DCI scheduled by multiple TTIs shown in fig. 3 to fig. 6, and the descriptions thereof are omitted here for further details regarding the sending method of the DCI scheduled by multiple TTIs.

Referring to fig. 9, fig. 9 is a schematic structural diagram of a DCI receiving apparatus for multi-TTI data scheduling according to an embodiment of the present invention. The receiving apparatus of the DCI scheduled by the multi-TTI data may include:

a DCI receiving module 91, adapted to receive DCI from a network side, where the DCI includes a number M of TTIs used for data scheduling and a HARQ ID corresponding to a first TTI;

a first subset determining module 92, adapted to determine a set of HARQ IDs, and select M HARQ IDs from the set of HARQ IDs as a HARQ ID subset for first data transmission, where a first HARQ ID in the HARQ ID subset is a HARQ ID corresponding to the first TTI;

a first data determining module 93 adapted to determine data of a plurality of TTIs received or data of a plurality of TTIs to be transmitted;

a first corresponding relation determining module 94, adapted to determine HARQ IDs corresponding to data of each TTI according to HARQ ID sequences in the HARQ ID subset; wherein M is a positive integer greater than or equal to 2.

Referring to fig. 10, fig. 10 is a schematic structural diagram of a DCI transmitting apparatus for multi-TTI data scheduling according to an embodiment of the present invention. The apparatus for transmitting DCI scheduled by multi-TTI data may include:

a second subset determining module 101, adapted to determine a set of HARQ IDs, and select M HARQ IDs from the set of HARQ IDs as a HARQ ID subset for a first data transmission, where a first HARQ ID in the HARQ ID subset is a HARQ ID corresponding to a first TTI;

a number determining module 102 adapted to determine a number M of TTIs for data scheduling;

a second data determining module 103 adapted to determine received data of a plurality of TTIs or data of a plurality of TTIs to be transmitted;

a second corresponding relation determining module 104, adapted to determine, according to the HARQ ID sequence in the HARQ ID subset, a HARQ ID corresponding to the data of each TTI;

a DCI configuring module 105, adapted to configure DCI, where the DCI includes the number M of TTIs and a HARQ ID corresponding to the first TTI;

a DCI sending module 106 adapted to send the DCI to the user terminal.

An embodiment of the present invention further provides a storage medium, on which computer instructions are stored, and when the computer instructions are executed, the steps of the receiving method of the DCI scheduled by multiple TTIs shown in fig. 3 to 6 are executed, or the steps of the sending method of the DCI scheduled by multiple TTIs shown in fig. 8 are executed. The storage medium may be a computer-readable storage medium, and may include, for example, non-volatile (non-volatile) or non-transitory (non-transitory) memory, and may also include optical disks, mechanical hard disks, solid state hard disks, and so on.

An embodiment of the present invention further provides a user terminal, which includes a memory and a processor, where the memory stores computer instructions capable of being executed on the processor, and the processor executes the steps of the receiving method of DCI scheduled by multiple TTIs shown in fig. 3 to 6 when executing the computer instructions. The terminal includes, but is not limited to, a mobile phone, a computer, a tablet computer and other terminal devices.

The embodiment of the present invention further provides a network side, which includes a memory and a processor, where the memory stores computer instructions capable of being executed on the processor, and the processor executes the steps of the method for transmitting DCI through multi-TTI data scheduling shown in fig. 8 when executing the computer instructions. The network side comprises but is not limited to network side equipment such as a server, a base station, an internet of things cloud platform, an internet of vehicles cloud platform and the like.

Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A receiving method of DCI scheduled by multi-TTI data is characterized by comprising the following steps:

receiving DCI from a network side, wherein the DCI comprises the number M of TTIs for data scheduling and a HARQ ID corresponding to the first TTI;

determining a set of HARQ IDs, and selecting M HARQ IDs from the set of HARQ IDs as a HARQ ID subset for data first transmission, wherein a first HARQ ID in the HARQ ID subset is a HARQ ID corresponding to the first TTI;

determining received data of a plurality of TTIs or data of a plurality of TTIs to be transmitted;

determining the HARQ ID corresponding to the data of each TTI according to the HARQ ID sequence in the HARQ ID subset;

wherein M is not less than 2 and is a positive integer.

2. The method of receiving DCI scheduled for multiple TTIs of claim 1, wherein selecting M HARQ IDs in the set of HARQ IDs as the subset of HARQ IDs for the first transmission of data comprises:

determining a preset offset;

determining other M-1 HARQ IDs in the HARQ ID subset by adopting the following formula according to the preset offset and the HARQ ID corresponding to the first TTI:

the ith HARQ ID is (i-1 th HARQ ID + preset offset) mod N;

3. The method of claim 2, wherein the DCI further comprises an index value indicating the predetermined offset;

the determining the preset offset comprises:

receiving a set of all offsets from the network side;

and determining the preset offset in the set of all offsets according to the index value.

4. The method of receiving DCI scheduled for multiple TTIs according to claim 1, wherein selecting M HARQ IDs in the set of HARQ IDs as the subset of HARQ IDs for a first transmission of data comprises:

receiving DFI information from the network side, and determining occupied HARQ ID according to the DFI information; and removing the occupied HARQ ID from the set of HARQ IDs, and selecting M HARQ IDs as a HARQ ID subset for the first transmission of data according to an ID ascending cyclic sequence by taking the HARQ ID corresponding to the first TTI as a first HARQ ID in the rest HARQ IDs.

5. The method of receiving DCI for multi-TTI data scheduling of any of claims 1 to 4, wherein determining the data for the plurality of TTIs received or to be transmitted comprises: determining a preset TTI offset;

and determining other TTIIDs by adopting the following formula according to the preset TTI offset and the first TTI ID:

the 1 st TTI ID is the TTI ID + K0 where the DCI is located; or 1 st TTI ID is TTI ID + K2 where DCI is located;

the ith TTI ID is the ith-1 TTI ID plus the preset TTI offset; determining data received or data to be transmitted at each TTI ID according to the corresponding relation between the data of the plurality of TTIs and the TTI ID;

the K0 is used for representing the time interval between the PDSCH and the PDCCH, the K2 is used for representing the time interval between the PUSCH and the PDCCH, N is not less than 2 and is a positive integer, and i is not less than 2 and not more than M.

6. The method of claim 5, wherein the DCI further includes a TTI index value for indicating the predetermined TTI offset;

the determining the preset TTI offset comprises:

receiving a set of all TTI offsets from the network side;

and determining the preset TTI offset in the set of all TTI offsets according to the TTI index value.

7. A method for transmitting DCI scheduled by multi-TTI data is characterized by comprising the following steps:

determining a set of HARQ IDs, and selecting M HARQ IDs from the set of HARQ IDs as a HARQ ID subset for data first transmission, wherein a first HARQ ID in the HARQ ID subset is a HARQ ID corresponding to a first TTI;

determining the number M of TTI used for data scheduling;

configuring DCI, wherein the DCI comprises the number M of the TTIs and the HARQ ID corresponding to the first TTI;

and sending the DCI to a user terminal.

8. The method of claim 7, wherein selecting M HARQ IDs from the set of HARQ IDs as the subset of HARQ IDs for first transmission of data comprises:

determining a preset offset;

the ith HARQ ID is (i-1 th HARQ ID + preset offset) mod N;

9. The method of claim 8, wherein the DCI further includes an index value indicating the predetermined offset;

the determining the preset offset comprises:

determining a set of all offsets and index values of the preset offsets;

10. The method of claim 7, wherein selecting M HARQ IDs from the set of HARQ IDs as the subset of HARQ IDs for first transmission of data comprises:

receiving UCI information from the user terminal, and determining an occupied HARQID according to the UCI information;

and removing the occupied HARQ IDs from the set of HARQ IDs, and selecting M HARQ IDs as a HARQ ID subset for the first transmission of data according to an ID ascending cyclic sequence by taking the HARQ ID corresponding to the first TTI as a first HARQ ID in the rest HARQ IDs.

11. The method of any of claims 7 to 10, wherein determining the received data of the plurality of TTIs or the data of the plurality of TTIs to be transmitted comprises: determining a preset TTI offset;

the ith TTI ID is the ith-1 TTI ID plus the preset TTI offset;

determining data received or to-be-transmitted at each TTI ID according to the corresponding relation between the data of the plurality of TTIs and the TTI ID;

12. The method of claim 11, wherein the DCI further includes a TTI index value indicating the predetermined TTI offset;

the determining the preset TTI offset comprises:

determining a set of all TTI offsets and TTI index values of the preset TTI offsets;

13. An apparatus for receiving DCI scheduled for multiple TTIs, comprising:

the DCI receiving module is suitable for receiving DCI from a network side, wherein the DCI comprises the number M of TTIs used for data scheduling and a HARQ ID corresponding to the first TTI;

a first subset determining module, adapted to determine a set of HARQ IDs, and select M HARQ IDs from the set of HARQ IDs as a HARQ ID subset for a first data transmission, where a first HARQ ID in the HARQ ID subset is a HARQ ID corresponding to the first TTI;

the first data determining module is suitable for determining received data of a plurality of TTIs or data of a plurality of TTIs to be sent;

the first corresponding relation determining module is suitable for determining the HARQ ID corresponding to the data of each TTI according to the HARQ ID sequence in the HARQ ID subset;

wherein M is not less than 2 and is a positive integer.

14. A device for transmitting DCI scheduled by multi-TTI data, comprising:

a second subset determining module, adapted to determine a set of HARQ IDs, and select M HARQ IDs from the set of HARQ IDs as a HARQ ID subset for a first transmission of data, where a first HARQ ID in the HARQ ID subset is a HARQ ID corresponding to a first TTI;

a number determination module adapted to determine a number M of TTIs for data scheduling;

the second data determination module is suitable for determining received data of a plurality of TTIs or data of a plurality of TTIs to be transmitted;

the second corresponding relation determining module is suitable for determining the HARQ ID corresponding to the data of each TTI according to the HARQ ID sequence in the HARQ ID subset;

a DCI configuration module, adapted to configure DCI, where the DCI includes the number M of TTIs and a HARQ ID corresponding to the first TTI;

and the DCI sending module is suitable for sending the DCI to the user terminal.

15. A storage medium having stored thereon computer instructions, wherein said computer instructions are operable to perform the steps of a method of receiving DCI according to any one of claims 1 to 6 or a method of transmitting DCI according to any one of claims 7 to 12.

16. A user terminal comprising a memory and a processor, said memory having stored thereon computer instructions executable on said processor, wherein said processor when executing said computer instructions performs the steps of a method for receiving DCI for multi-TTI data scheduling according to any one of claims 1 to 6.

17. A network side device comprising a memory and a processor, wherein the memory stores computer instructions capable of being executed on the processor, and wherein the processor executes the computer instructions to perform the steps of the method for transmitting DCI scheduled by multi-TTI data according to any one of claims 7 to 12.