CN112910610B

CN112910610B - Hybrid automatic repeat request response method and device

Info

Publication number: CN112910610B
Application number: CN202110057874.0A
Authority: CN
Inventors: 闫志宇; 王志勤; 杜滢; 刘晓峰; 焦慧颖; 沈霞
Original assignee: China Academy of Information and Communications Technology CAICT
Current assignee: China Academy of Information and Communications Technology CAICT
Priority date: 2021-01-15
Filing date: 2021-01-15
Publication date: 2022-05-24
Anticipated expiration: 2041-01-15
Also published as: CN112910610A; WO2022152028A1

Abstract

The application discloses a hybrid automatic repeat request response method, which is used for delaying to send HARQ-ACK when the HARQ-ACK feedback of a PDSCH configured by SPS is cancelled due to configuration conflict, wherein an original PUCCH where the cancelled HARQ-ACK is located is positioned in a basic time unit; carrying delayed HARQ-ACK by taking the earliest alternative channel as a target channel; the alternative channels comprise at least one of a first alternative channel and a second alternative channel: the first alternative channel is that the first alternative symbol in the basic time unit or the subsequent time unit takes consecutive N in turn₁A channel composed of a plurality of alternative symbols; the second alternative channel is at least one of the following channels in the basic time unit or in a subsequent time unit: PUCCH configured as HARQ-ACK for transmitting SPS, CSI, or HARQ-ACK for dynamically scheduled PDSCH, semi-statically scheduled PUSCH. The application also comprises a device applying the method. The method and the device solve the problem that the network equipment and the terminal equipment cannot realize communication on the delayed transmitted HARQ-ACK information.

Description

Hybrid automatic repeat request response method and device

Technical Field

The present application relates to the field of wireless communications technologies, and in particular, to a hybrid automatic repeat request response method and device.

Background

The use of a hybrid automatic repeat request acknowledgement HARQ mechanism in NR systems improves the efficiency of data transmission. In the MAC layer, each cell has an HARQ entity, and the uplink and the downlink are independent. Each HARQ entity contains multiple parallel HARQ processes. And the terminal equipment UE instructs the physical layer to send ACK (acknowledgement) or NACK (non-acknowledgement) information according to the decoding result. The ACK and NACK information are collectively referred to as hybrid automatic repeat request acknowledgement information HARQ-ACK. The whole of HARQ-ACK information fed back by the UE on one HARQ feedback resource (PUCCH or PUSCH) is called HARQ-ACK codebook.

Semi-Persistent Scheduling (SPS), or Semi-Persistent Scheduling, allows the periodic allocation of PDSCH or PUSCH resources to a specific UE through one-time physical downlink control channel Scheduling. Namely, the SPS scheduling has the characteristics of one-time allocation and multiple-time use. In addition, SPS scheduling can avoid the base station from sending scheduling information corresponding to the PDSCH to the UE when downlink data is required, so that the time delay of downlink data transmission can be reduced, and the requirement of delay-sensitive service transmission is met. The data scheduled by the SPS supports HARQ transmission, and for each PDSCH transmission scheduled by the SPS, the UE transmits HARQ-ACK corresponding to each PDSCH in PUCCH resources corresponding to each PDSCH.

For the traffic of a Time Sensitive Network (TSN), there are multiple data streams with priority to cycles and urgency. And, while supporting the irregular burst emergency service, the TSN needs to support the service with low delay requirement. Traffic in a TSN network may not be an integer multiple of symbols, slots, or subframes. On one hand, the NR system will support configuring multiple sets of SPS parameters for the UE to meet the traffic demand of the TSN, and the parameters of the multiple sets of SPS may be configured independently. The NR system will support a short cycle configured traffic type for the UE. For example, the SPS support period is 1 slot length. And if the UE receives the PDSCH related to SPS scheduling in the time slot n, the UE feeds back 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 a PDCCH activating SPS, 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. In any case, after the SPS is activated, the timing difference between the PDSCH of the SPS and the HARQ-ACK feedback corresponding thereto is unified as "k".

The feedback of HARQ-ACK is based on time units, the length of which is preset. In the TDD system, the slot length is 14 symbols under normal CP conditions. Symbols within a slot may include three types: a DL (downlink) symbol, an UL (uplink) symbol, or an F (Flexible) symbol. For example, the predetermined time unit is a time slot or a sub-time slot. The frame structure configuration adopts a mode of combining semi-static RRC configuration and dynamic DCI configuration. The base station is configured to be a semi-static frame format for the UE through an RRC cell level and a UE special level. According to the semi-static configuration, the UE may determine whether each time cell includes symbols that are each DL symbols, UL symbols, or F symbols. Semi-statically configured DL symbols are used for DL transmission, UL symbols are used for UL transmission, and F symbols may be used for downlink transmission as well as uplink transmission. After configuring the semi-static frame format, the system may adjust the frame format configuration through Slot Format Indication (SFI). The slot structure indication information is transmitted to the UE by the base station through DCI format 2_ 0. The SFI can change only a semi-statically configured symbol of F to a downlink symbol or an uplink symbol, and cannot change a semi-statically configured DL symbol and UL symbol. The flexible symbols indicated by the SFI cannot be used for semi-static uplink transmission.

If a slot where a PUCCH for feeding back HARQ-ACK for SPS PDSCH is located is configured as a downlink slot or at least one symbol of PUCCH resources for feeding back HARQ-ACK for SPS PDSCH is configured as a downlink symbol or a flexible symbol, the PUCCH is cancelled. Accordingly, the network device gNB can only perform retransmission scheduling on the PDSCH of the SPS corresponding thereto when the HARQ-ACK information is not acquired. Under the condition that the terminal device actually acquires the PDSCH of the SPS correctly, the system efficiency is low, and the time delay characteristic of the service is influenced. The above problem of HARQ-ACK feedback being cancelled is particularly severe in cases where the periodicity of the SPS configuration is short, and HARQ-ACK feedback is very frequent.

And in order to ensure that the gNB can correctly receive the HARQ-ACK of the SPS PDSCH which is sent in a delayed manner, the gNB and the UE need to have the same determination result for resource positions of other PUCCHs/PUSCHs. In addition, the cancelled HARQ-ACK needs to be fed back in time so as not to affect the PDSCH scheduling process and ensure the service performance requirement of the SPS bearer service. At present, no prior art solves the problem of how the gNB and the UE determine other PUCCH/PUSCH resources, and the network equipment and the terminal equipment cannot realize communication on the HARQ-ACK information transmitted in a delayed manner.

Disclosure of Invention

The application provides a hybrid automatic repeat request response method and equipment, which solve the problem that network equipment and terminal equipment cannot realize communication on delayed transmitted HARQ-ACK information, and particularly, the technical scheme for determining resources of other PUCCHs/PUSCHs by gNB and UE provided by the invention ensures that the gNB and the UE determine a consistent target channel. And the UE sends a cancel HARQ-ACK in the determined target channel, and the gNB receives the cancel HARQ-ACK in the determined target channel. And the UE is ensured to send and cancel HARQ-ACK as early as possible, and the requirements of time delay, reliability and scheduling process of services carried by the SPS PDSCH are met.

In a first aspect, the present application provides a hybrid automatic repeat request response method for delaying sending HARQ-ACK when HARQ-ACK feedback of a PDSCH configured by SPS is cancelled due to configuration collision, including the following steps:

the original PUCCH where the cancelled HARQ-ACK is located in a basic time unit;

taking the earliest alternative channel as a target channel, wherein the target channel is used for carrying delayed HARQ-ACK, and the delayed HARQ-ACK is the cancelled HARQ-ACK;

the alternative channels comprise at least one of a first alternative channel and a second alternative channel:

the first alternative channel is located after the end time of the original PUCCH, and the first alternative symbol in the basic time unit or in a time unit subsequent to the basic time unit starts to sequentially take continuous N₁Channel composed of several alternative symbols, N₁The candidate symbol is a preset value, and the candidate symbol comprises an uplink symbol configured by semi-static information;

the second alternative channel is at least one of the following channels in the basic time unit or a time unit subsequent to the basic time unit after the predetermined PUCCH ending time:

PUCCH configured as HARQ-ACK or CSI for transmitting SPS, semi-persistent scheduled PUSCH.

Preferably, the method of the present application includes first indication information for indicating: the alternative symbols further include symbols in which the semi-static information is configured as flexible symbols and the slot structure indication information indicates uplink, or the alternative symbols do not include symbols in which the semi-static information is configured as flexible symbols and the slot structure indication information indicates uplink.

Preferably, the method of the present application includes second indication information for indicating: the second alternative channel comprises a dynamically scheduled PUSCH, or the second alternative channel does not comprise a dynamically scheduled PUSCH, or the second alternative channel comprises a PUCCH for HARQ-ACK of a dynamically scheduled PDSCH, or the second alternative channel does not comprise a PUCCH for HARQ-ACK of a dynamically scheduled PDSCH.

Preferably, the earliest candidate channel is determined by at least one of the following ways: the start symbol time is earliest; the end symbol time is earliest.

Further, if the earliest alternative channel comprises a first alternative channel and a second alternative channel, the first alternative channel is taken as a target channel.

The method according to any one of the embodiments of the first aspect of the present application, for a network device, includes the following steps:

the network equipment determines the target channel;

the network device receives the delayed HARQ-ACK on the target channel.

In one embodiment of the present application, the method further comprises the steps of:

the network equipment sends the first indication information and/or the second indication information.

The method according to any one of the embodiments of the first aspect of the present application, applied to a terminal device, includes the following steps:

the terminal equipment determines the target channel;

and the terminal equipment sends the delayed HARQ-ACK in the target channel.

and the terminal equipment receives the first indication information and/or the second indication information.

In a second aspect, the present application further provides a network device, and with the method of any one of the first aspects of the present application, the network device is configured to determine the target channel and receive the delayed HARQ-ACK in the target channel.

In a third aspect, the present application further provides a terminal device, where with the method of any of the first aspects of the present application, the terminal device is configured to determine the target channel, and send the delayed HARQ-ACK in the target channel.

In the apparatus of the second aspect and the third aspect, the present application also proposes a communication device, including: memory, a processor and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the method according to any one of the embodiments of the first aspect of the application.

In a fourth aspect, the present application also proposes a computer-readable medium on which a computer program is stored, which computer program, when being executed by a processor, carries out the steps of the method according to any one of the embodiments of the first aspect of the present application.

In a fifth aspect, the present application further provides a mobile communication system, including at least one network device according to any embodiment of the present application and/or at least one terminal device according to any embodiment of the present application.

The embodiment of the application adopts at least one technical scheme which can achieve the following beneficial effects:

the transmission delay and reliability requirements of the SPS PDSCH are considered, and the gNB and the UE are ensured to determine a consistent target channel. And the UE sends a cancel HARQ-ACK in the determined target channel, and the gNB receives the cancel HARQ-ACK in the determined target channel. And the UE is ensured to send and cancel HARQ-ACK as early as possible, and the requirements of time delay, reliability and scheduling process of services carried by the SPS PDSCH are met.

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 diagram illustrating that HARQ-ACK feedback corresponding to SPS configuration PDSCH in a TDD system is cancelled;

FIG. 2 is a flow chart of an embodiment of the method of the present application;

FIG. 3(a) is a diagram illustrating the determination of a target channel in a current time unit using a first alternative channel;

FIG. 3(b) is a diagram illustrating the determination of a target channel in a subsequent time unit using a first alternative channel;

FIG. 4(a) is a diagram illustrating the determination of a target channel in a current time unit using a second alternative channel;

FIG. 4(b) is a diagram of determining a target channel in a subsequent time unit using a second alternative channel;

FIG. 5(a) is a diagram illustrating the determination of a target channel in a current time unit using first and second alternative channels;

FIG. 5(b) is a diagram illustrating the determination of a target channel in a subsequent time unit using first and second alternative channels;

FIG. 6 is a flow chart of an embodiment of a method of the present application for a network device;

FIG. 7 is a flowchart of an embodiment of a method of the present application for a terminal device;

FIG. 8 is a schematic diagram of an embodiment of a network device;

FIG. 9 is a schematic diagram of an embodiment of a terminal device;

fig. 10 is a schematic structural diagram of a network device according to another embodiment of the present invention;

fig. 11 is a block diagram of a terminal device of another embodiment of the present invention.

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.

Fig. 1 is a diagram illustrating that HARQ-ACK feedback corresponding to SPS configuration PDSCH in TDD system is cancelled. As shown in the figure, the period of the SPS configuration is 1 slot, and k is 3. HARQ-ACK of SPS PDSCH sent by time slot n, time slot n +1 and time slot n +2 are respectively in time slot n +3, time slot n +4 and time slot n + 5. Since part of the PUCCH symbols of the HARQ-ACK corresponding to the SPS PDSCH in the time slot n +3 is configured as downlink symbols, the HARQ-ACK of the SPS PDSCH sent by the time slot n is forced to be cancelled, and the system efficiency is influenced.

And determining that the timing difference between the SPS PDSCH and the HARQ-ACK feedback corresponding to the SPS PDSCH is 'k' according to the PDCCH for activating the SPS. And for the SPS PDSCH of the time unit n, determining that the original PUCCH fed back by the HARQ-ACK is positioned in a basic time unit n + k according to the timing difference. Since at least one symbol in the base PUCCH is a frame format RRC configured DL symbol or a frame format RRC configured F symbol but a DL symbol or F symbol modified by SFI, the original PUCCH will be cancelled. Then a target channel is determined to carry the HARQ-ACK for the SPS PDSCH, which is referred to as a delayed HARQ-ACK. The target channel is PUCCH or PUSCH.

To ensure that the delayed HARQ-ACK can be correctly sent from the UE to the gNB, a method needs to be determined to ensure that the gNB and the UE determine a consistent target channel. And the UE sends the delayed HARQ-ACK on the determined target channel, and the gNB receives the delayed HARQ-ACK on the determined target channel. In addition, the delayed HARQ-ACK needs to be fed back in time, so that the gNB can obtain the transmission ACK or NACK state of the HARQ process corresponding to the SPS PDSCH in time, and schedule data retransmission or new data transmission in the HARQ process, and therefore, the determination of the target channel needs to not affect the PDSCH scheduling process as much as possible and to ensure the service performance requirement of the SPS bearer service.

The method by which the gNB and UE determine the resources of the "other" PUCCH/PUSCH is as follows.

Fig. 2 is a flowchart of an embodiment of the method of the present application.

In a first aspect, the present application provides a hybrid automatic repeat request response method for delaying transmission of HARQ-ACK when HARQ-ACK feedback of a PDSCH configured by SPS is cancelled due to configuration collision, including the following steps 101 to 104:

step 101, generating indication information for indicating the range of the alternative channels, including the alternative symbol type used by the first alternative channel and the uplink channel type included by the second alternative channel.

For example, the method of the present application includes first indication information for indicating: the alternative symbols further comprise symbols with semi-static information configured as flexible symbols and the time slot structure indication information indicated as uplink, or the alternative symbols do not comprise symbols with semi-static information configured as flexible symbols and the time slot structure indication information indicated as uplink.

For another example, the method of the present application includes second indication information for indicating: the second alternative channel comprises a dynamically scheduled PUSCH, or the second alternative channel does not comprise a dynamically scheduled PUSCH, or the second alternative channel comprises a PUCCH for HARQ-ACK of a dynamically scheduled PDSCH, or the second alternative channel does not comprise a PUCCH for HARQ-ACK of a dynamically scheduled PDSCH.

It should be noted that the first indication information and the second indication information may be configuration information located in an SPS, or may be downlink control information located in an active PDCCH.

Step 102, determining delayed HARQ-ACK, wherein the delayed HARQ-ACK is the cancelled HARQ-ACK.

HARQ-ACK feedback for SPS configured PDSCH is cancelled due to configuration collision. And the original PUCCH where the cancelled HARQ-ACK is located in a basic time unit. Generating a delayed HARQ-ACK corresponding to the cancelled HARQ-ACK. These cancelled HARQ-ACKs will be delayed in other channels and are referred to as "delayed HARQ-ACKs" in this application.

The configuration conflict refers to that a time slot in which an original PUCCH for feeding back HARQ-ACK of the SPS PDSCH is located is configured as a downlink time slot, or a symbol of an original PUCCH resource for feeding back HARQ-ACK of the SPS PDSCH is configured as a downlink symbol or a flexible symbol, and particularly, the configuration conflict includes a preset original PUCCH resource for feeding back HARQ-ACK and a flexible symbol or downlink symbol conflict in TDD configuration.

The original PUCCH where the cancelled HARQ-ACK is located is denoted as "base PUCCH" in each of the following embodiments of fig. 3(a) to 5(b), where the base PUCCH is located in a base time unit, the base PUCCH includes the cancelled HARQ-ACK, and the cancelled HARQ-ACK is feedback information for the target SPS PDSCH, and is discarded, and is actually generated as a delayed HARQ-ACK.

The time unit of the present application may be a time slot or a sub-time slot. The time length of the time slot or sub-time slot is preset.

Step 103, determining alternative channels, wherein the alternative channels comprise at least one of a first alternative channel and a second alternative channel.

The first alternative channel is located after the end time of the original PUCCH, and the first alternative symbol in the basic time unit or in a time unit subsequent to the basic time unit starts to sequentially take continuous N₁Channel composed of several alternative symbols, N₁The candidate symbols comprise uplink symbols indicated by semi-static information;

the second alternative channel is at least one of the following channels in the basic time unit or the subsequent time unit after the original PUCCH ending time:

And step 104, taking the earliest alternative channel as a target channel, wherein the target channel is used for bearing the delayed HARQ-ACK.

Fig. 3(a) to 3(b) show cases where the basic time unit is included and not included in the subsequent time duration considered for determining the first alternative channel, respectively. Fig. 3(a) is a schematic diagram of determining a target channel by using a first alternative channel in a current time unit, and fig. 3(b) is a schematic diagram of determining a target channel by using a first alternative channel in a subsequent time unit. If the alternative channels only comprise the first alternative channel, and the target channel is the earliest first alternative channel after the basic PUCCH, the UE can be ensured to transmit the cancel HARQ-ACK in the uplink symbol resource which can be used for uplink transmission as soon as possible, and the time delay and reliability characteristics of the service carried by the SPS PDSCH are met. Wherein N is₁＝4。

Fig. 4(a) to 4(b) show the cases where the base time unit is included and not included in the subsequent time duration considered when determining the second alternative channel, respectively. Fig. 4(a) is a schematic diagram of determining a target channel by using a second alternative channel in a current time unit, and fig. 4(b) is a schematic diagram of determining a target channel by using a second alternative channel in a subsequent time unit. If the alternative channels only comprise the second alternative channel, and the target channel is the earliest second alternative channel after the basic PUCCH, the UE can be ensured to send the cancel HARQ-ACK in the existing PUCCH or PUSCH as soon as possible, and the time delay and reliability characteristics of the service carried by the SPS PDSCH are met.

Fig. 5(a) to 5(b) show examples of cases where the considered subsequent time duration includes and does not include the basic time unit when determining the candidate channel, respectively. Fig. 5(a) is a schematic diagram of determining a target channel using first and second alternative channels in a current time unit, and fig. 5(b) is a schematic diagram of determining a target channel using first and second alternative channels in a subsequent time unit.

If the alternative channels comprise the first alternative channel and the second alternative channel, and the target channel is the earliest alternative channel after the basic PUCCH, the UE can be ensured to send the cancel HARQ-ACK as early as possible, and the time delay and reliability characteristics of the service carried by the SPS PDSCH are met.

It should be noted that, the earliest candidate channel is determined as the target channel, and the earliest candidate channel refers to the candidate channel with the earliest starting symbol or the candidate channel with the earliest ending symbol. And if the alternative channels comprise a first alternative channel and a second alternative channel, the earliest alternative channel comprises two alternative channels, and the earliest alternative channel is determined to be the first alternative channel of the two alternative channels. Or determining whether the earliest alternative channel is the first alternative channel or the second alternative channel of the two channels is preset by a protocol.

Fig. 6 is a flowchart of an embodiment of a method of the present application for a network device.

The method of any one embodiment of the first aspect of the present application, for a network device, includes the following steps 201-203:

step 201, the network device sends first indication information and/or second indication information.

About the first indication information

The gNB may indicate, through the first indication information, whether the alternative symbol for transmitting the cancellation HARQ-ACK of the SPS PDSCH includes a first type symbol. The first type of symbols refer to symbols in which semi-static information is configured as flexible symbols and slot structure indication information indicates uplink. If the first indication information is in the first state, the alternative symbols comprise symbols of a first type; if the first indication information is in the second state, the alternative symbols do not include the first type of symbols. The first indication information may be transmitted to the UE in configuration information of the SPS, and may be transmitted to the UE in an active PDCCH of the SPS.

According to the prior art, both UL and F symbols in a semi-static frame format configuration may be used for uplink transmission. If the SFI change frame format configuration is not supported, the UL symbol and the F symbol of the semi-static configuration are both alternative symbols. If the SFI change frame format configuration is supported, whether the semi-statically configured F symbol can be used for uplink transmission depends on whether the semi-static F symbol is changed to a DL symbol by SFI, whether the uplink transmission is semi-static uplink transmission, and the like. In case the SFI is not correctly detected on the UE side, there will be different determinations by the gNB and the UE as to which symbols can be used for uplink transmission. For example, the symbols 1-14 of the slot n in the semi-static frame format configuration are configured as follows:

symbol numbering	1	2	3	4	5	6	7	8	9	10	11	12	13	14
															Direction of the symbol	D	D	D	D	D	D	F	F	F	F	U	U	U	U

On the basis of the semi-static frame format configuration, the SFI changes the last two F symbols to UL symbols. If the UE does not correctly detect the SFI, the UE considers that the symbols of the time slot n can be used for uplink transmission to be symbols 7-14. But the gNB considers that of the symbols of slot n, symbols 9-14 are available for semi-static uplink transmission. If the candidate channel of a certain target channel comprises symbols 7, 8. The UE may regard the channel as a target channel, but the gNB regards the channel as not being a target channel, and determines other alternative channels as target channels according to a preset rule, so that the cancellation HARQ-ACK cannot be correctly received by the gNB. If the DL SPS configuration corresponds to a service with high reliability requirement, canceling HARQ-ACK which cannot be correctly received by the gNB will seriously affect the service performance of the service, and invalid uplink transmission also affects the efficiency of the system.

One way to avoid the difference between the target channels determined by the gNB and the UE due to the SFI transmission failure is to provide that both the gNB and the UE determine only the semi-static frame format configured UL symbols as alternative symbols by the protocol. Therefore, the range of the alternative symbols is not influenced by the transmission failure or not of the SFI, and the service performance corresponding to the DL SPS configuration can be ensured. However, the probability of SFI transmission failure is not high, and not all DL SPS configurations need to transmit traffic with high performance requirements. It is specified that only UL symbols configured for the semi-static frame format can be used as alternative symbols that will affect the latency performance of the cancellation of HARQ-ACK. For example, according to the specification, there is no target channel available on the candidate symbol of the time slot n, the gNB and the UE can only determine the target channel in the next time unit, and the transmission time for canceling the HARQ-ACK will be later, which affects the transmission delay of the service on the SPS.

In summary, if the indication result of the SFI is used to determine the candidate symbol, it is beneficial to cancel the transmission delay of HARQ-ACK, so as to improve the delay performance of the service; however, under the condition of SFI transmission failure, the transmission performance of HARQ-ACK is not favorable to be cancelled, and the reliability of the service is further influenced. Considering that the gNB may control the transmission reliability of the SFI to some extent, for example, by mapping the SFI to a radio resource with better transmission condition, tuning up the aggregation level of DCI format 2_0 may improve its transmission reliability. The gNB may also determine the traffic performance transmitted on the configuration of the DL SPS. The gNB may evaluate whether the impact on traffic performance in case of SFI transmission failure is within an acceptable range.

If the influence on the service performance transmitted on the SPS under the condition of SFI transmission failure is within an acceptable range, and the gNB indicates that when a target channel for transmitting the SPS PDSCH for canceling HARQ-ACK is determined, the alternative symbols consider the result of changing the semi-statically configured F symbols by the SFI, namely the alternative symbols comprise semi-statically configured UL symbols and symbols which are semi-statically configured F symbols and changed into UL by the SFI.

If the influence on the service performance transmitted on the SPS under the condition of SFI transmission failure is not in an acceptable range, and the gNB indicates the target channel of the SPS PDSCH for canceling the HARQ-ACK, the alternative symbols do not consider the result of changing the semi-statically configured F symbols by the SFI, namely the alternative symbols only comprise semi-statically configured DL symbols.

When the gNB indicates to the UE to determine a target channel of delayed HARQ-ACK of a certain SPS PDSCH, whether the alternative symbol needs to consider the result of changing the semi-statically configured F symbol by the SFI or not is beneficial to ensuring the compromise of the service reliability and the delay performance, and the overall efficiency and the service performance of the system are ensured.

About the second indication information

The gNB can indicate whether the alternative channel for sending the cancellation HARQ-ACK of the SPS PDSCH comprises a dynamically scheduled PUSCH or not and/or a PUCCH containing the HARQ-ACK of the dynamically scheduled PDSCH or not through the second indication information. If the second indication information is in the first state, the alternative channel comprises a dynamically scheduled PUSCH; the alternative channel does not include the dynamically scheduled PUSCH if the second indication information is in the second state. If the second indication information is in the third state, the alternative channel comprises a PUCCH for dynamically scheduling HARQ-ACK of the PDSCH; if the second indication information is the fourth state, the alternative channel does not include a PUCCH that dynamically schedules HARQ-ACK of the PDSCH. Or the second indication information indicates that whether the alternative channel for sending the cancellation HARQ-ACK of the SPS PDSCH comprises the dynamically scheduled PUSCH or not and whether the PUCCH containing the HARQ-ACK of the dynamically scheduled PDSCH is jointly indicated. For example, if the second indication information is the fifth state, the alternative channel comprises a dynamically scheduled PUSCH and a PUCCH for HARQ-ACK for a dynamically scheduled PDSCH; if the second indication information is in the sixth state, the alternative channel does not include the dynamically scheduled PUSCH and the PUCCH for HARQ-ACK of the dynamically scheduled PDSCH. The second indication information may be transmitted to the UE in configuration information of the SPS, and may be transmitted to the UE in an active PDCCH of the SPS.

The PUSCH is divided into two categories: one is that downlink control information DCI sent by a network device schedules a PUSCH sent by a terminal device, and is dynamic grant scheduling. The other is that the network device semi-statically configures the PUSCH transmitted by the terminal device, that is, the network device instructs the terminal device to transmit the PUSCH in an unauthorized scheduling manner. The transmission method of PUSCH may refer to 3GPP TS38.214 V16.3.0.

The PUCCH is divided into four types: and the gNB configures PUCCH resources for SPS HARQ-ACK, PUCCH resources for CSI feedback, PUCCH resources for dynamically scheduling HARQ-ACK of PDSCH and PUCCH resources for canceling HARQ-ACK for the UE. Configuring PUCCH resources for SPS HARQ-ACK for transmitting HARQ-ACK information of PDSCH configured by downlink SPS, wherein when SR transmission is required, the PUCCH comprises SR, and in addition, the PUCCH does not comprise other uplink control information; configuring PUCCH resources for CSI feedback for transmitting channel state information, when the transmission requirement of HARQ-ACK information of a PDSCH configured by SR and downlink SPS exists, the PUCCH comprises the HARQ-ACK information of the PDSCH configured by SR and SPS, and the PUCCH does not comprise HARQ-ACK of the PDSCH dynamically scheduled; and configuring PUCCH resources for dynamically scheduling the HARQ-ACK of the PDSCH for transmitting the HARQ-ACK of the dynamically scheduled PDSCH, wherein when any item of SR, HARQ-ACK of the PDSCH configured by downlink SPS and CSI information needs to be transmitted, the PUCCH comprises the HARQ-ACK of the PDSCH configured by SR and SPS and the CSI information. For any PUCCH, the resource configuration includes the format, symbol length in time, and resource block position in frequency of the PUCCH. The PUCCH resources used for SPS HARQ-ACK are located in a time unit determined according to the SPS PDSCH feedback time difference, the position of the PUCCH in the time unit is determined by the configuration information of the PUCCH, the PUCCH used for CSI feedback is determined by the activation time of the CSI feedback period or the semi-continuous CSI, the time unit used for dynamically scheduling the PUCCH resources of the PDSCH HARQ-ACK is determined by dynamic scheduling signaling, and the like. There is only one PUCCH in a time unit actually used for transmitting the same priority level HARQ-ACK. If a plurality of PUCCHs for transmitting different uplink control information types overlap in time, one of the plurality of PUCCHs is determined to be used for transmitting all of the uplink control information. And if the PUCCH and the PUSCH to be transmitted are overlapped in time, transmitting the uplink control information in the PUCCH in the PUSCH, and discarding the PUCCH. Irrespective of the transmission cancellation HARQ-ACK, referring to 3GPP TS38.213 V16.3.0, a PUCCH or PUSCH for each time unit including a basic time unit from the basic time unit may be determined as a second alternative channel.

Similar to the alternative symbol determining process, if the alternative channel is a PUSCH dynamically scheduled by grant, or a PUCCH of HARQ-ACK dynamically scheduled for PDSCH, the alternative channel determining process is affected by the reliability of the dynamically scheduled grant, and the determination result of the alternative channel by the network device and the terminal device may be different. For example, if the dynamic grant scheduling is not correctly detected by the terminal device, the terminal device does not consider that there is the alternative channel, but the network device uses the PUSCH of the dynamic grant scheduling or the PUCCH of the HARQ-ACK of the dynamic scheduling PDSCH as the alternative channel, which may cause the target channels finally determined by the network device and the terminal device to be different. However, if the alternative channel does not include any PUSCH dynamically scheduled by grant or PUCCH dynamically scheduled for HARQ-ACK of PDSCH, under the condition of high transmission reliability of dynamic scheduling grant, it may cause that the PUSCH dynamically scheduled by grant effectively transmitted by the terminal device or the PUCCH dynamically scheduled for HARQ-ACK of PDSCH cannot carry cancellation HARQ-ACK, which affects timely transmission of cancellation of HARQ-ACK, and affects delay characteristics and scheduling flow of SPS bearer service.

Considering that the gNB may control the transmission reliability of the dynamic grant scheduling information to some extent, for example, by mapping the PDCCH of the dynamic grant scheduling information to a radio resource with a better transmission condition, the aggregation level of the corresponding PDCCH is adjusted to be higher to improve the transmission reliability thereof. The gNB may also determine the traffic performance transmitted on the configuration of the DL SPS. The gNB may evaluate whether the impact on traffic performance in case of a failure of the dynamic grant scheduling transmission is within an acceptable range.

And if the influence on the service performance transmitted on the SPS is within an acceptable range under the condition that the dynamic authorization scheduling transmission is failed, and when the gNB indicates that a target channel for canceling the HARQ-ACK of the SPS PDSCH is determined to be transmitted, the alternative channel comprises a dynamically scheduled PUSCH or a PUCCH comprising the HARQ-ACK of the dynamically scheduled PDSCH.

And if the influence on the service performance transmitted on the SPS is not in an acceptable range under the condition that the dynamic authorization scheduling transmission is failed, and the gNB indicates the target channel of the SPS PDSCH for canceling the HARQ-ACK, the alternative channel does not comprise the dynamically scheduled PUSCH or the PUCCH of the HARQ-ACK of the dynamically scheduled PDSCH.

When the gNB indicates to the UE to determine a target channel of delayed HARQ-ACK of a certain SPS PDSCH, whether the alternative channel comprises a dynamically scheduled PUSCH or a PUCCH comprising the HARQ-ACK of the dynamically scheduled PDSCH is beneficial to ensuring the compromise between the reliability and the delay performance of the service, and ensuring the overall efficiency and the service performance of the system.

Step 202, the network device determines the target channel.

The target channel is the earliest candidate channel after the base PUCCH.

The alternative channels comprise at least one of the following first alternative channels and second alternative channels.

With respect to the first alternative channel

If the HARQ-ACK is not cancelled for transmission, the alternative channel does not exist, namely, a plurality of continuous symbols are determined as the alternative channel in the range of the alternative symbols through a preset rule and are exclusively used for sending the cancellation HARQ-ACK.

And the gNB configures PUCCH resources for SPS HARQ-ACK, PUCCH resources for CSI feedback and PUCCH resources for dynamically scheduling HARQ-ACK of the PDSCH for the UE through high-layer signaling. The PUCCH resource configuration includes a format of the PUCCH, a symbol length in time, a resource block position in frequency, and the like. The gNB can also configure PUCCH resources for canceling HARQ-ACK for the UE through high layer signaling. By taking any one of the PUCCH resource configurations as a reference, the number of symbols included in the PUCCH corresponding to the configuration is N₁Then, the earliest consecutive N located after the base PUCCH can be determined from the candidate symbols of each time unit counted from the base time unit₁And the symbol is used as a first alternative channel.

Optionally, the first alternative channel is determined in the basic time unit.

To ensure that the gNB can correctly determine at the UE that the target PUCCH receives the HARQ-ACK of the SPS PDSCH that is transmitted with a delay, the gNB and the UE need to have a uniform determination result as to which symbols are alternative symbols. On the basis of ensuring that the gNB and the UE have the same determination result on the alternative signals, the gNB and the UE can determine a uniform first alternative channel in the alternative symbols in the same manner.

It should be noted that, the first candidate channel is obtained by sequentially taking consecutive N from the first candidate symbol in the basic time unit or in the subsequent time unit after the end time of the original PUCCH₁Channel composed of several alternative symbols, N₁Is a preset value. The first alternative channel comprises N in the same time unit₁A candidate symbol.

For the second alternative channel

This alternative channel exists even if no cancellation HARQ-ACK is transmitted.

The uplink channel transmitted by the terminal device includes PUCCH and PUSCH.

If the second alternative channel is a semi-statically configured channel, the gNB and the UE can determine a unified second alternative channel through the same preset mode. If the second alternative channel is a dynamically scheduled channel, the gNB and the UE may determine a unified second alternative channel with reference to the second indication information.

Preferably, the candidate symbols are determined first, and then the target channel is determined within the range of the candidate symbols.

Step 203, the network device receives the delayed HARQ-ACK in the target channel.

Fig. 7 is a flowchart of an embodiment of the method of the present application, applied to a terminal device.

The method according to any one embodiment of the first aspect of the present application, applied to a terminal device, includes the following steps 301 to 303:

step 301, the terminal device receives first indication information and/or second indication information.

Regarding the first indication information and the second indication information, see step 201.

Step 302, the terminal device determines the target channel.

The target channel is the earliest candidate channel after the base PUCCH. The alternative channels comprise at least one of a first alternative channel and a second alternative channel. Preferably, the candidate symbols are determined first, and then the target channel is determined within the range of the candidate symbols.

See step 202 for the first alternative channel and the second alternative channel.

Step 303, the terminal device sends the delayed HARQ-ACK in the target channel.

Fig. 8 is a schematic diagram of an embodiment of a network device.

An embodiment of the present application further provides a network device, where, using the method in any embodiment of the present application, the network device is configured to: and determining the target channel, and receiving the delayed HARQ-ACK in the target channel.

In order to implement the foregoing technical solution, the network device 400 provided in the present application includes a network sending module 401, a network determining module 402, and a network receiving module 403.

The network sending module is configured to send a PDSCH, and is further configured to send a high layer signaling and/or a downlink control signaling, where the network sending module includes at least one of the following indication information: the first indication information and the second indication information.

The network determining module is configured to determine a configuration conflict, further determine the basic PUCCH and the basic time unit, further determine a first candidate channel and a second candidate channel (preferably, determine the first candidate channel and the second candidate channel according to the first indication information and the second indication information), and determine a target channel among the earliest candidate channels.

And the network receiving module is used for receiving the target channel and obtaining the delayed HARQ-ACK information.

The specific method for implementing the functions of the network sending module, the network determining module, and the network receiving module is described in the embodiments of the methods of the present application, and is not described herein again.

Fig. 9 is a schematic diagram of an embodiment of a terminal device.

The present application further provides a terminal device, which uses the method of any one of the embodiments of the present application, and is configured to: and determining the target channel, and sending the delayed HARQ-ACK in the target channel.

In order to implement the foregoing technical solution, the terminal device 500 provided in the present application includes a terminal sending module 501, a terminal determining module 502, and a terminal receiving module 503.

The terminal receiving module is configured to receive the PDSCH, and is further configured to receive a high layer signaling and/or a downlink control signaling, where the terminal receiving module includes at least one of the following indication information: the first indication information and the second indication information.

The terminal determining module is configured to determine a configuration conflict, further determine the basic PUCCH and the basic time unit, further determine a first candidate channel and a second candidate channel (preferably, determine the first candidate channel and the second candidate channel according to the first indication information and the second indication information), and determine a target channel from the earliest candidate channels.

And the terminal sending module is used for sending the target channel, wherein the target channel comprises the delayed HARQ-ACK information.

The specific method for implementing the functions of the terminal sending module, the terminal determining module and the terminal receiving module is as described in the method embodiments of the present application, and is not described herein again.

The terminal equipment can be mobile terminal equipment; it can also refer to the fixed or mobile terminal equipment set with the ground in the ground-air communication.

Fig. 10 is a schematic structural diagram of a network device according to another embodiment of the present invention. As shown, the network device 600 includes a processor 601, a wireless interface 602, and a memory 603. Wherein the wireless interface may be a plurality of components, i.e. including a transmitter and a receiver, providing means for communicating with various other apparatus over a transmission medium. The wireless interface implements a communication function with the terminal device, and processes wireless signals through the receiving and transmitting devices, and data carried by the signals are communicated with the memory or the processor through the internal bus structure. The memory 603 contains a computer program that executes any of the embodiments of the present application, running or changed on the processor 601. When the memory, processor, wireless interface circuit are connected through a bus system. The bus system includes a data bus, a power bus, a control bus, and a status signal bus, which are not described herein.

Fig. 11 is a block diagram of a terminal device of another embodiment of the present invention. The terminal device 700 comprises at least one processor 701, a memory 702, a user interface 704 and at least one network interface 703. The various components in the terminal device 700 are coupled together by a bus system. A bus system is used to enable connection communication between these components. The bus system includes a data bus, a power bus, a control bus, and a status signal bus.

The user interface 704 may include a display, a keyboard, or a pointing device, such as a mouse, a trackball, a touch pad, or a touch screen, among others.

The memory 702 stores executable modules or data structures. The memory may have stored therein an operating system and an application program. The operating system includes various system programs, such as a framework layer, a core library layer, a driver layer, and the like, and is used for implementing various basic services and processing hardware-based tasks. The application programs include various application programs such as a media player, a browser, and the like for implementing various application services.

In the embodiment of the present invention, the memory 702 contains a computer program for executing any of the embodiments of the present application, and the computer program runs or changes on the processor 701.

The memory 702 contains a computer readable storage medium, and the processor 701 reads the information in the memory 702 and combines the hardware to complete the steps of the above-described method. In particular, the computer-readable storage medium has stored thereon a computer program which, when being executed by the processor 701, carries out the steps of the method embodiments as described above with reference to any of the embodiments.

The processor 701 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the method of the present application may be implemented by hardware integrated logic circuits in the processor 701 or by instructions in the form of software. The processor 701 may be a general purpose processor, a digital signal processor, an application specific integrated circuit, an off-the-shelf programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor.

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. In a typical configuration, the device of the present application includes one or more processors (CPUs), an input/output user interface, a network interface, and a memory.

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 application therefore also proposes a computer-readable medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of the embodiments of the present application. For example, the

memory

603, 702 of the present invention may include volatile memory in a computer readable medium, Random Access Memory (RAM) and/or nonvolatile memory such as Read Only Memory (ROM) or flash memory (flash RAM).

Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.

Based on the embodiments of fig. 8 to 11, the present application further provides a mobile communication system including at least 1 embodiment of any terminal device in the present application and/or at least 1 embodiment of any network device in the present application.

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.

It should be noted that "first" and "second" in this application are used for distinguishing a plurality of objects having the same name, and have no sequential meaning, and specific meanings thereof refer to the descriptions in this document.

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 or the like made within the spirit and principle of the present application shall be included in the scope of the claims of the present application.

Claims

1. A hybrid automatic repeat request acknowledgement method for delaying transmission of HARQ-ACK feedback of SPS configured PDSCH when the HARQ-ACK feedback is cancelled due to configuration collision,

the first alternative channel is located after the end time of the original PUCCH, and the first alternative symbol in the basic time unit or in a time unit subsequent to the basic time unit starts to sequentially take continuous N₁Alternative(s)Channel of symbols, N₁The candidate symbol is a preset value, and the candidate symbol comprises an uplink symbol configured by semi-static information;

PUCCH configured as HARQ-ACK or CSI for transmitting SPS, semi-statically scheduled PUSCH.

2. The method of claim 1, comprising first indication information for indicating:

the alternative symbols further comprise symbols in which semi-static information is configured into flexible symbols and the time slot structure indication information indicates that the symbols are uplink;

alternatively, the first and second electrodes may be,

the alternative symbols do not include symbols in which semi-static information is configured as flexible symbols and the slot structure indication information indicates uplink.

3. The method of claim 1, comprising second indication information for indicating that:

the second alternative channel comprises a dynamically scheduled PUSCH;

alternatively, the first and second electrodes may be,

the second alternative channel does not contain a dynamically scheduled PUSCH;

alternatively, the first and second liquid crystal display panels may be,

the second alternative channel comprises a PUCCH for dynamically scheduling HARQ-ACK of a PDSCH;

alternatively, the first and second electrodes may be,

the second alternative channel does not contain a PUCCH for HARQ-ACK of a dynamically scheduled PDSCH.

4. The method of claim 1,

the earliest alternative channel is judged by at least one of the following modes:

the start symbol time is earliest;

the end symbol time is earliest.

5. The method of claim 1,

the earliest alternative channel comprises a first alternative channel and a second alternative channel, and the first alternative channel is used as a target channel.

6. The method according to any of claims 1 to 5, for a network device, comprising the steps of:

the network equipment determines the target channel;

the network device receives the delayed HARQ-ACK on the target channel.

7. The method of claim 6, further comprising the step of:

the network equipment sends first indication information and/or second indication information;

the first indication information is used for indicating: the alternative symbols further comprise symbols with semi-static information configured as flexible symbols and with the indication information of the time slot structure as uplink, or the alternative symbols do not comprise symbols with semi-static information configured as flexible symbols and with the indication information of the time slot structure as uplink;

the second indication information is used for indicating that: the second alternative channel comprises a dynamically scheduled PUSCH, or the second alternative channel does not comprise a dynamically scheduled PUSCH, or the second alternative channel comprises a PUCCH for HARQ-ACK of a dynamically scheduled PDSCH, or the second alternative channel does not comprise a PUCCH for HARQ-ACK of a dynamically scheduled PDSCH.

8. The method according to any one of claims 1 to 5, applied to a terminal device, comprising the steps of:

the terminal equipment determines the target channel;

and the terminal equipment sends the delayed HARQ-ACK in the target channel.

9. The method of claim 8,

the terminal equipment receives first indication information and/or second indication information;

the first indication information is used for indicating: the alternative symbols further comprise symbols with semi-static information configured as flexible symbols and with the indication information of the slot structure as uplink, or the alternative symbols do not comprise symbols with semi-static information configured as flexible symbols and with the indication information of the slot structure as uplink;

10. A network device, using the method of any one of claims 1 to 7,

the network device is configured to determine the target channel, and receive the delayed HARQ-ACK in the target channel.

11. A terminal device using the method of any one of claims 1 to 5 and 8 to 9,

the terminal device is configured to determine the target channel, and send the delayed HARQ-ACK in the target channel.

12. A communication device, comprising: memory, processor and computer program stored on the memory and executable on the processor, which computer program, when executed by the processor, carries out the steps of the method according to any one of claims 1 to 9.

13. A computer-readable medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 9.

14. A mobile communication system comprising at least one network device according to claim 10 and/or at least one terminal device according to claim 11.