CN110944400B

CN110944400B - ACK/NACK feedback method, system, base station and terminal

Info

Publication number: CN110944400B
Application number: CN201811118992.2A
Authority: CN
Inventors: 高程; 朱雪田; 毛聪杰; 李志军
Original assignee: China Telecom Corp Ltd
Current assignee: China Telecom Corp Ltd
Priority date: 2018-09-25
Filing date: 2018-09-25
Publication date: 2021-11-16
Anticipated expiration: 2038-09-25
Also published as: CN110944400A

Abstract

The disclosure relates to an ACK/NACK feedback method, a system, a base station and a terminal, relating to the technical field of communication. The method of the present disclosure comprises: sending a corresponding feedback period, feedback time and a position of corresponding ACK/NACK indication information in the feedback information to the terminal; each terminal is divided into different terminal groups, and the feedback period and the feedback time corresponding to each terminal in the same terminal group are the same; according to the received uplink transmission condition of the terminal in the corresponding feedback period, generating ACK/NACK indication information in the feedback period corresponding to the terminal; generating feedback information for the terminal group according to the position of the ACK/NACK indication information corresponding to each terminal in the same terminal group in the feedback information; and sending corresponding feedback information to the terminal group according to the feedback period and the feedback time corresponding to the terminal group so that each terminal can obtain corresponding ACK/NACK indication information.

Description

ACK/NACK feedback method, system, base station and terminal

Technical Field

The present disclosure relates to the field of communications technologies, and in particular, to an ACK/NACK feedback method, system, base station, and terminal.

Background

In a conventional uplink transmission process, a user requests uplink transmission resources through an SR (Scheduling Request), and a base station schedules uplink transmission of the user through DCI (Downlink Control Information). In order to reduce delay and signaling overhead, non-scheduling uplink transmission is introduced into NR (New Radio, New air interface) of 5G, and a user performs uplink transmission according to semi-static resource allocation.

According to the protocol agreed in the standardization work, a timer is introduced for the acknowledgement of the receipt of the unscheduled uplink transmission. For the user side, the user starts a timer after one uplink transmission, and if the user does not receive the dynamic DCI scheduling corresponding to the HARQ process retransmission during the running period of the timer, the default base station successfully receives the uplink transmission. For the base station, if the receiving fails, the retransmission of the uplink transmission is dynamically scheduled through the DCI, and if the receiving succeeds, the feedback information is not transmitted.

Under the current non-scheduling uplink transmission and HARQ (Hybrid Automatic Repeat Request) mechanism, when no uplink data arrives, the user will not transmit on the configured resource, and therefore, if the base station does not detect uplink transmission on the configured resource, the base station will not send feedback information.

Disclosure of Invention

The inventor finds that: according to the current non-scheduling uplink transmission and HARQ mechanism, the user sends uplink transmission, and due to other situations such as severe channel fading, the base station considers that the user does not perform uplink transmission on the configured resources, so that no feedback information is sent. At this time, for the ue, the situation may be confused with the situation that the base station does not send the feedback information when the reception is successful, so that the uplink data is lost.

One technical problem to be solved by the present disclosure is: an ACK/NACK feedback method for non-scheduling uplink transmission of a terminal is provided, and the success rate of the uplink transmission is improved.

According to some embodiments of the present disclosure, an ACK/NACK feedback method is provided, including: sending a corresponding feedback period, feedback time and a position of corresponding ACK/NACK indication information in the feedback information to the terminal; each terminal is divided into different terminal groups, and the feedback period and the feedback time corresponding to each terminal in the same terminal group are the same; according to the received uplink transmission condition of the terminal in the corresponding feedback period, generating ACK/NACK indication information in the feedback period corresponding to the terminal; generating feedback information for the terminal group according to the position of the ACK/NACK indication information corresponding to each terminal in the same terminal group in the feedback information; and sending corresponding feedback information to the terminal group according to the feedback period and the feedback time corresponding to the terminal group so that each terminal can obtain corresponding ACK/NACK indication information.

In some embodiments, sending the corresponding feedback period, the feedback time, and the position of the corresponding acknowledgement or negative acknowledgement ACK/NACK indication information in the feedback information to the terminal comprises: and sending a corresponding feedback period, a feedback time and a position of corresponding acknowledgement or negative acknowledgement (ACK/NACK) indication information in the feedback information to the terminal through Radio Resource Control (RRC) signaling.

In some embodiments, in a case where each terminal in the terminal group has only one uplink transmission opportunity in a corresponding feedback period, the feedback information includes feedback information transmitted through common downlink control information DCI; the ACK/NACK indication information in the feedback period corresponding to the terminal is used for indicating whether the base station receives the information of the uplink transmission of the terminal; or under the condition that the terminals of the terminal group have multiple uplink transmission opportunities in the corresponding feedback period, the feedback information comprises the feedback information transmitted through the public DCI; the ACK/NACK indication information in the feedback period corresponding to the terminal is used for indicating the times of the base station receiving the uplink transmission of the terminal; or under the condition that the terminals of the terminal group have multiple uplink transmission opportunities in the corresponding feedback period and the number of the transmission opportunities is lower than the threshold value, the feedback information comprises the feedback information transmitted through the public DCI; the ACK/NACK indication information in the feedback period corresponding to the terminal is a bitmap, and each bit of the bitmap is used for indicating whether the base station receives a primary uplink transmission opportunity corresponding to the terminal; or under the condition that the terminals of the terminal group perform uplink transmission for multiple times in the corresponding feedback period and the transmission times are higher than a threshold value, the feedback information comprises feedback information transmitted through a Physical Downlink Shared Channel (PDSCH); and the ACK/NACK indication information in the feedback period corresponding to the terminal is a bitmap, and each bit of the bitmap is used for indicating whether the base station receives a primary uplink transmission opportunity corresponding to the terminal.

In some embodiments, the method further comprises: and sending a corresponding ACK/NACK feedback scheme to the terminal, wherein the ACK/NACK feedback scheme is used for indicating the form and meaning of ACK/NACK indication information corresponding to the terminal.

In some embodiments, the method further comprises: and sending the corresponding ACK/NACK indication information bit number to the terminal so that the terminal can obtain the corresponding ACK/NACK indication information according to the ACK/NACK indication information bit number.

In some embodiments, the method further comprises: according to the time delay requirement of the terminal and the uplink transmission resource information, the terminal is divided into different terminal groups, and the feedback period and the feedback time of the base station for feeding back the terminal are determined.

In some embodiments, dividing the terminals into different terminal groups according to the delay requirement of the terminal and the resource information of the uplink transmission includes: determining the feedback time range of the terminal according to the time delay requirement of the terminal and the uplink transmission resource information, and dividing the terminals with overlapped feedback time ranges into the same terminal group; the feedback time range meets the time delay requirement of the terminal; the feedback time is an available downlink time slot or symbol after a time domain position occupied by uplink transmission of the terminal.

In some embodiments, the method further comprises: sending corresponding Group radio network temporary identifiers (Group-RNTIs) to the terminals, wherein the Group-RNTIs of the terminals in the same terminal Group are the same; scrambling the feedback information corresponding to the terminal Group by using the Group-RNTI corresponding to the terminal Group under the condition that the feedback information is transmitted through the common DCI; or under the condition that the feedback information is the feedback information transmitted through the PDSCH, scrambling DCI (downlink control information) scheduling the feedback information corresponding to the terminal Group by using the Group-RNTI corresponding to the terminal Group.

According to other embodiments of the present disclosure, there is provided an ACK/NACK feedback method including: the terminal receives the feedback cycle, the feedback time and the position of the corresponding ACK/NACK indication information in the feedback information sent by the base station; each terminal is divided into different terminal groups, and the feedback period and the feedback time corresponding to each terminal in the same terminal group are the same; the terminal receives feedback information sent by the base station according to the corresponding feedback period and the corresponding feedback time; and the terminal analyzes the feedback information according to the position of the ACK/NACK indication information in the feedback information to acquire the corresponding ACK/NACK indication information.

In some embodiments, the terminal receives, through radio resource control RRC signaling, a position of a corresponding acknowledgement or negative acknowledgement ACK/NACK indication information in the feedback information, which is sent by the base station, and a corresponding feedback period.

In some embodiments, the method further comprises: the terminal receives a corresponding ACK/NACK feedback scheme sent by the base station, wherein the ACK/NACK feedback scheme is used for indicating the form and meaning of ACK/NACK indication information corresponding to the terminal; the terminal analyzes the feedback information according to the position of the ACK/NACK indication information in the feedback information, and the analysis comprises the following steps: and the terminal analyzes the feedback information according to the corresponding ACK/NACK feedback scheme and the position of the ACK/NACK indication information in the feedback information.

In some embodiments, the method further comprises: a terminal receives the bit number of corresponding ACK/NACK indication information sent by a base station; the terminal analyzes the feedback information according to the position of the ACK/NACK indication information in the feedback information, and the analysis comprises the following steps: and the terminal analyzes the feedback information according to the corresponding ACK/NACK feedback scheme, the bit number of the ACK/NACK indication information and the position of the ACK/NACK indication information in the feedback information.

In some embodiments, the method further comprises: the terminal receives a corresponding Group radio network temporary identifier Group-RNTI sent by the base station, and the Group-RNTIs of the terminals in the same terminal Group are the same; the terminal analyzes the feedback information according to the position of the ACK/NACK indication information in the feedback information, and the analysis comprises the following steps: the terminal descrambles the feedback information by using the corresponding Group-RNTI under the condition that the feedback information is transmitted through the public DCI, and analyzes the feedback information according to the position of the ACK/NACK indication information in the feedback information; or the terminal descrambles the DCI which is the reverse scheduling feedback information by using the corresponding Group-RNTI when the feedback information is the feedback information transmitted by the PDSCH, and analyzes the feedback information according to the position of the ACK/NACK indication information in the feedback information.

According to still other embodiments of the present disclosure, there is provided a base station including: a configuration information sending module, configured to send a corresponding feedback period, feedback time, and a position of corresponding ACK/NACK indication information in the feedback information to the terminal; each terminal is divided into different terminal groups, and the feedback period and the feedback time corresponding to each terminal in the same terminal group are the same; an indication information generating module, configured to generate, according to a received uplink transmission condition of the terminal in a corresponding feedback period, ACK/NACK indication information in the feedback period corresponding to the terminal; the feedback information generating module is used for generating feedback information for the terminal group according to the position of the ACK/NACK indication information corresponding to each terminal in the same terminal group in the feedback information; and the feedback information sending module is used for sending corresponding feedback information to the terminal group according to the feedback cycle and the feedback time corresponding to the terminal group so that each terminal can obtain corresponding ACK/NACK indication information.

In some embodiments, the configuration information sending module is configured to send the corresponding feedback cycle, the feedback time, and the position of the corresponding ACK/NACK indication information in the feedback information to the terminal through radio resource control RRC signaling.

In some embodiments, the configuration information sending module is further configured to send a corresponding ACK/NACK feedback scheme to the terminal, where the ACK/NACK feedback scheme is used to indicate a form and meaning of ACK/NACK indication information corresponding to the terminal.

In some embodiments, the configuration information sending module is further configured to send the corresponding ACK/NACK indication information bit number to the terminal, so that the terminal obtains the corresponding ACK/NACK indication information according to the ACK/NACK indication information bit number.

In some embodiments, the base station further comprises: and the configuration information determining module is used for dividing the terminal into different terminal groups according to the time delay requirement of the terminal and the uplink transmission resource information, and determining the feedback cycle and the feedback time for the base station to feed back the terminal.

In some embodiments, the configuration information determining module is configured to determine a feedback time range of the terminal according to a delay requirement of the terminal and the uplink transmission resource information, and divide the terminals with overlapping feedback time ranges into the same terminal group; the feedback time range meets the time delay requirement of the terminal; the feedback time is an available downlink time slot or symbol after a time domain position occupied by uplink transmission of the terminal.

In some embodiments, the configuration information sending module is further configured to send a corresponding Group radio network temporary identifier Group-RNTI to the terminal, where the Group-RNTIs of the terminals in the same terminal Group are the same; the feedback information generating module is also used for scrambling the feedback information corresponding to the terminal Group by using the Group-RNTI corresponding to the terminal Group under the condition that the feedback information is the feedback information transmitted through the public DCI; or under the condition that the feedback information is the feedback information transmitted through the PDSCH, scrambling DCI (downlink control information) scheduling the feedback information corresponding to the terminal Group by using the Group-RNTI corresponding to the terminal Group.

According to still further embodiments of the present disclosure, there is provided a terminal including: a configuration information receiving module, configured to receive a feedback cycle, a feedback time and a position of corresponding ACK/NACK indication information in the feedback information, where the feedback cycle and the feedback time correspond to a base station; each terminal is divided into different terminal groups, and the feedback period and the feedback time corresponding to each terminal in the same terminal group are the same; the feedback information receiving module is used for receiving feedback information sent by the base station according to the corresponding feedback cycle and the corresponding feedback time; and the information analysis module is used for analyzing the feedback information according to the position of the ACK/NACK indication information in the feedback information to acquire the corresponding ACK/NACK indication information.

In some embodiments, the configuration information receiving module is configured to receive, through radio resource control RRC signaling, a position of a feedback information in which the base station transmits a corresponding feedback cycle, a feedback time, and corresponding ACK/NACK indication information.

In some embodiments, the configuration information receiving module is further configured to receive a corresponding ACK/NACK feedback scheme sent by the base station, where the ACK/NACK feedback scheme is used to indicate a form and meaning of ACK/NACK indication information corresponding to the terminal; and the information analysis module is used for analyzing the feedback information according to the corresponding ACK/NACK feedback scheme and the position of the ACK/NACK indication information in the feedback information.

In some embodiments, the configuration information receiving module is further configured to receive a corresponding ACK/NACK indication information bit number sent by the base station; and the information analysis module is used for analyzing the feedback information according to the corresponding ACK/NACK feedback scheme, the bit number of the ACK/NACK indication information and the position of the ACK/NACK indication information in the feedback information.

In some embodiments, the configuration information receiving module is further configured to receive a Group radio network temporary identifier Group-RNTI sent by the base station, where the Group-RNTIs of the terminals in the same terminal Group are the same; the information analysis module is used for descrambling the feedback information by using the corresponding Group-RNTI under the condition that the feedback information is the feedback information transmitted through the public DCI and analyzing the feedback information according to the position of the ACK/NACK indication information in the feedback information; or when the feedback information is the feedback information transmitted by the PDSCH, descrambling the DCI which is the inverse scheduling feedback information by using the corresponding Group-RNTI, and analyzing the feedback information according to the position of the ACK/NACK indication information in the feedback information.

According to still other embodiments of the present disclosure, there is provided a base station including: a memory; and a processor coupled to the memory, the processor configured to perform the ACK/NACK feedback method as in any of the preceding embodiments based on instructions stored in the memory device.

According to still further embodiments of the present disclosure, there is provided a terminal including: a memory; and a processor coupled to the memory, the processor configured to perform the ACK/NACK feedback method as in any of the preceding embodiments based on instructions stored in the memory device.

According to still further embodiments of the present disclosure, there is provided a computer readable storage medium having a computer program stored thereon, wherein the program, when executed by a processor, implements the steps of the ACK/NACK feedback method of any of the preceding embodiments.

According to still further embodiments of the present disclosure, there is provided an ACK/NACK feedback system including: the base station and the terminal of any of the preceding embodiments.

In the disclosure, the terminals are divided into different terminal groups, and corresponding feedback periods and feedback times are set for the different terminal groups. And generating feedback information for each terminal group according to the uplink transmission condition of the terminal in the corresponding feedback period. And then sending feedback information to each terminal group according to the corresponding feedback period and feedback time. The terminal can receive the ACK/NACK indication information according to the obtained feedback period, feedback time and the position of the corresponding ACK/NACK indication information in the feedback information. Based on the scheme disclosed by the invention, the terminal can determine whether the uplink transmission of the terminal is received according to the ACK/NACK indication information, and then whether retransmission is carried out is selected, so that the success rate and the reliability of the uplink transmission are improved. In addition, the terminals are grouped, and the terminals in the same terminal group share the feedback information, so that the interaction between the base station and the terminals is reduced, and the resource utilization rate of the downlink physical channel is improved.

Other features of the present disclosure and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.

Drawings

In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 shows a flow diagram of an ACK/NACK feedback method of some embodiments of the present disclosure.

Fig. 2 shows a flow diagram of an ACK/NACK feedback method of further embodiments of the present disclosure.

Fig. 3A, 3B, 3C, 3D respectively illustrate schematic diagrams of feedback information for some embodiments of the present disclosure.

Fig. 4A, 4B, 4C, 4D respectively illustrate schematic diagrams of feedback information for some embodiments of the present disclosure.

Fig. 5 shows a schematic structural diagram of a base station of some embodiments of the present disclosure.

Fig. 6 illustrates a schematic structural diagram of a terminal of some embodiments of the present disclosure.

Fig. 7 illustrates a structural diagram of an ACK/NACK feedback device of some embodiments of the present disclosure.

Fig. 8 is a schematic structural diagram of an ACK/NACK feedback apparatus according to another embodiment of the present disclosure.

Fig. 9 illustrates a structural diagram of an ACK/NACK feedback system of some embodiments of the present disclosure.

Detailed Description

The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are only a part of the embodiments of the present disclosure, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the disclosure, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.

The disclosure provides an ACK/NACK feedback method, which can be used in a scenario where a base station performs feedback for a terminal without scheduling uplink transmission. The disclosed ACK/NACK feedback method is described below in conjunction with fig. 1.

Fig. 1 is a flow chart of some embodiments of the disclosed ACK/NACK feedback method. As shown in fig. 1, the method of this embodiment includes: steps S102 to S108.

In step S102, a corresponding feedback cycle, a feedback time, and a position of corresponding ACK/NACK (acknowledgement or negative acknowledgement) indication information in the feedback information are sent to the terminal; correspondingly, the terminal receives the feedback cycle and the feedback time corresponding to the terminal and the position of the corresponding ACK/NACK indication information in the feedback information.

The ACK/NACK indication information is used to indicate whether the base station receives uplink transmission of the terminal. Each terminal is divided into different terminal groups, and the feedback period and the feedback time corresponding to each terminal in the same terminal group are the same. In some embodiments, a feedback cycle and a feedback time for a base station to perform uplink transmission feedback on a terminal are determined according to a time delay requirement of the terminal and resource information of uplink transmission; and dividing the terminals into different terminal groups according to the feedback period and the feedback time. The time delay requirement of the terminal can be determined according to the service type of the terminal.

For each terminal, the determination of the feedback period and the feedback time needs to consider the following 2 factors: 1) latency requirements. For example, the delay requirement of URLLC (Ultra Reliable & Low Latency Communication) service on the user plane is 0.5ms, the delay requirement of eMBB (enhanced Mobile Broadband) service on the user plane is 4ms, and the delay requirement of service of internet of things is relatively loose. The determination of the feedback period needs to ensure that the delay requirement of the terminal is met, i.e. the delay requirement allowed by the terminal service should be met when the terminal transmits the feedback information uplink to the user. 2) Resource information of uplink transmission (e.g., uplink transmission resource period and time domain location of the resource). The feedback time may be an available downlink time slot or symbol after a time domain position occupied by uplink transmission of the terminal.

For each terminal, according to the configured uplink transmission resource information and the time delay requirement of the current service, the appropriate feedback time range available for the terminal can be determined. Terminals with overlapping ranges of available feedback time are grouped together. The feedback period and the feedback time of the terminal group are determined by the feedback time range of each terminal, and the feedback time range meets the time delay requirement of the terminal.

And transmitting the ACK/NACK indication information of the terminals by using the same feedback information aiming at each terminal in the same terminal group. The position of the ACK/NACK indication information of each terminal in the same terminal group in the feedback information may be randomly allocated, or determined according to the sequence of uplink transmission of each terminal in a feedback period, and may be set according to actual requirements.

In some embodiments, the corresponding feedback cycle, the feedback time, and the position of the corresponding ACK/NACK indication information in the feedback information are sent to the terminal through RRC (Radio Resource Control) signaling.

In step S104, according to the received uplink transmission condition of the terminal in the corresponding feedback period, ACK/NACK indication information in the feedback period corresponding to the terminal is generated.

In a feedback period, the number of uplink transmission opportunities corresponding to different terminals or the number of occupied uplink transmission resources may be different, some terminals may have only one uplink transmission opportunity, and some terminals may have multiple uplink transmission opportunities. In the present disclosure, one or more repeated transmissions of one uplink data packet for a terminal are collectively referred to as one uplink transmission opportunity or one uplink transmission resource of the terminal. Different methods for generating the ACK/NACK indication information can be adopted for the uplink transmission condition of each terminal in the terminal group in a feedback period. Some embodiments of a method of generating ACK/NACK indication information are described below.

In some embodiments, when the uplink transmission opportunity of each terminal in the terminal group in one feedback period is only one time, 1-bit ACK/NACK indication information is generated for each terminal in the terminal group, and is used to indicate whether the base station receives the uplink transmission information of the terminal in the feedback period. For example, the ACK/NACK indication information may be set to '1' when the base station receives the data transmitted by the terminal in the uplink in the feedback period, and set to '0' when the base station does not receive the data transmitted by the terminal in the uplink in the feedback period, which is not limited to the above example.

In some embodiments, in the case that there are multiple uplink transmission opportunities for a terminal in a terminal group in one feedback period, the ACK/NACK indication information generated for each terminal in the terminal group is used to indicate the number of times that the base station receives the uplink transmission of the terminal in the feedback period. The ACK/NACK indication information corresponding to each terminal may be multi-bit. For example, when the number of times that the base station receives the terminal uplink transmission in the feedback period is 3, the ACK/NACK indication information may be set to 11.

In some embodiments, when there are multiple uplink transmission opportunities for a terminal in a terminal group in a feedback period, the ACK/NACK indication information generated for each terminal in the terminal group is a Bitmap (Bitmap), and each bit of the Bitmap is used to indicate whether a base station receives one uplink transmission corresponding to the terminal. For example, for one terminal, a 1-bit indication is corresponding to each uplink transmission opportunity in Bitmap, and the corresponding bit is set to '1' if the base station receives the uplink transmission of the terminal at the uplink transmission opportunity, set to '0' if the base station does not receive the uplink transmission of the terminal at the uplink transmission opportunity, or set to '0' if the base station receives the uplink transmission of the terminal at the uplink transmission opportunity, and set to '1' if the base station does not receive the uplink transmission of the terminal at the uplink transmission opportunity.

The above embodiments are only used to illustrate some ACK/NACK indication information generation manners, and may be set according to actual requirements in practical applications, and are not limited to the illustrated examples.

In step S106, feedback information is generated for the terminal group according to the position of the ACK/NACK indication information corresponding to each terminal in the same terminal group in the feedback information.

In a feedback period, the number of times of uplink transmission opportunities of the terminals in the terminal group is different, so the number of bits occupied by the ACK/NACK indication information corresponding to the terminal group may be different. For the ACK/NACK indication information with different lengths, feedback information with different forms can be selected and sent to the terminal.

In some embodiments, in a case that each terminal in the terminal group has only one uplink transmission opportunity in a corresponding feedback period, or in a case that the terminal in the terminal group has multiple uplink transmission opportunities in a corresponding feedback period, and the ACK/NACK indication Information in the feedback period corresponding to the terminal is used to indicate the number of times that the base station receives the uplink transmission of the terminal, or in a case that the terminal in the terminal group has multiple uplink transmission opportunities in a corresponding feedback period, and the number of transmission opportunities is lower than a threshold, and the ACK/NACK indication Information in the feedback period corresponding to the terminal is a bitmap, the feedback Information includes feedback Information transmitted through a common DCI (Downlink Control Information).

For example, the transmission format of the feedback information is similar to DCI format 2-2 in NR (the existing DCI format 2-2 may be used for transmission of multiple user power control information). The existing DCI format 2-2 can be applied, the feedback information aiming at each terminal in a terminal group is synthesized into a DCI to be sent, and the DCI information comprises ACK/NACK indication 1, ACK/NACK indication 2 and ACK/NACK indication N.

In some embodiments, when the terminals of the terminal group perform uplink transmission for multiple times in a corresponding feedback period, where the transmission times are higher than a threshold, and the ACK/NACK indication information in the feedback period corresponding to the terminals is a bitmap, the feedback information includes feedback information transmitted through a PDSCH (Physical Downlink Shared Channel).

For example, the DCI format 1 is applied to schedule the PDSCH, and feedback information of each terminal in one terminal group is transmitted in the PDSCH. If the number of transmission resources of the terminals in the feedback period is large, the number of ACK/NACK indication (indication information) bits of each terminal is large, and considering the bit number limitation of DCI, the number of terminals included in one terminal group may be small, or DCI information cannot carry indication information of all terminals in the terminal group under the condition that the number of terminals in the terminal group is large, so that the ACK/NACK indication information corresponding to the terminal group can be transmitted by using PDSCH. In this case, the terminal first analyzes scheduling information of the PDSCH from the DCI information, and further analyzes ACK/NACK instruction information of the terminal itself from the PDSCH.

In step S108, corresponding feedback information is sent to the terminal group according to the feedback period and the feedback time corresponding to the terminal group, and accordingly, each terminal obtains its own ACK/NACK indication information according to the corresponding feedback period, feedback time, and the position of the corresponding ACK/NACK indication information in the feedback information.

The base station periodically issues feedback information according to feedback periods corresponding to different terminal groups and feedback time corresponding to the terminal groups, for example, issues DCI information or issues feedback information through PDSCH, and carries ACK/NACK indication information of each terminal in the corresponding feedback period of the corresponding terminal group.

In the method of the above embodiment, the terminals are divided into different terminal groups, and corresponding feedback periods and feedback times are set for the different terminal groups. And generating feedback information for each terminal group according to the uplink transmission condition of the terminal in the corresponding feedback period. And then sending feedback information to each terminal group according to the corresponding feedback period and feedback time. The terminal can receive the ACK/NACK indication information according to the obtained feedback period, feedback time and the position of the corresponding ACK/NACK indication information in the feedback information. Based on the scheme of the embodiment, the terminal can determine whether the uplink transmission is received according to the ACK/NACK indication information, and further selects whether to retransmit, so that the success rate and the reliability of the uplink transmission are improved. In addition, the terminals are grouped, and the terminals in the same terminal group share the feedback information, so that the interaction between the base station and the terminals is reduced, and the resource utilization rate of the downlink physical channel is improved.

Further embodiments of the disclosed ACK/NACK feedback method are described below in conjunction with fig. 2.

Fig. 2 is a flow chart of other embodiments of the ACK/NACK feedback method of the present disclosure. As shown in fig. 2, the method of this embodiment includes: steps S202 to S216.

Step S202, the base station divides the terminals into different terminal groups according to the time delay requirement of the terminals and the resource information of uplink transmission, and determines the feedback cycle, the feedback time and the position of the ACK/NACK indication information of each terminal in the feedback information when the base station performs ACK/NACK feedback on the terminals.

Step S204, the base station distributes Group-RNTI (Group Radio Network Temporary Identity) for each terminal Group.

Different terminal groups correspond to different Group-RNTIs. The Group-RNTI is used to scramble feedback information or scheduling information of the feedback information corresponding to the terminal Group, and is used to distinguish the feedback information or scheduling information of the feedback information of different terminal groups, which will be described in detail later.

Step S206, the base station determines the ACK/NACK feedback scheme of the terminal group according to the times of uplink transmission opportunities of each terminal in the terminal group in the feedback period.

The ACK/NACK feedback scheme is used for indicating the form and meaning of ACK/NACK indication information corresponding to the terminal. Referring to the foregoing embodiment, the base station determines the bit number of the ACK/NACK indication information of the terminal and the transmission mode of the feedback information according to the number of uplink transmission opportunities or the number of uplink transmission resources of the terminal in the feedback period, and may divide the ACK/NACK feedback scheme into the following several schemes.

The first scheme is as follows: the ACK/NACK indication of the terminal occupies 1bit in the feedback information. As shown in fig. 3A, the ACK/NACK indication indicates whether the base station receives the uplink transmission of the terminal in the current feedback period. The feedback information is transmitted using common DCI, e.g., DCI format 2-2. The scheme is suitable for the scene that each terminal in the terminal group has only one transmission opportunity in the feedback period.

Scheme II: the ACK/NACK indication of the terminal occupies multiple bits in the feedback information. As shown in fig. 3B, the ACK/NACK indication indicates the number of uplink transmissions received by the base station in the current feedback period. The feedback information is transmitted using common DCI, e.g., DCI format 2-2. The scheme supports a scene that a user has multiple transmission opportunities in a feedback period.

The third scheme is as follows: the ACK/NACK indication of the terminal is in the form of Bitmap in the feedback information, and the bit number of the Bitmap is lower than or equal to a threshold value. As shown in fig. 3C, the ACK/NACK indication indicates on which uplink transmission resources the base station receives the uplink transmission of the terminal in the current feedback period. In Bitmap, each uplink transmission opportunity of a terminal corresponds to a 1-bit indication. The feedback information is transmitted using common DCI, e.g., DCI format 2-2. The scheme is suitable for a scene that a user has multiple transmission opportunities in a feedback period.

Compared with the second scheme, according to the method of the second scheme, the terminal can identify that the uplink transmission of the terminal is missed to be detected in the current feedback period, but cannot identify which data packet fails to be transmitted, so that the terminal retransmits all the data packets in the period. In the third scheme, the base station and the terminal have consensus on the positions and the number of the transmission resources in the feedback period, so that the uplink transmission of the terminal can be received on which uplink transmission resources can be indicated in a Bitmap form, and the terminal can identify the uplink transmission positions missed by the base station. Therefore, unnecessary retransmission can be reduced, and the resource utilization rate can be improved. But the second scheme can reduce the transmission quantity of the ACK/NACK indication and save the overhead of feedback. It should be noted that, in the third scheme, since the number of transmission resources of each terminal in a period may be different, in order to ensure that the number of ACK indication bits is the same among users, a user with the largest number of transmission resources is used as a reference, and if the number of transmission resources is less than a defined number of bits, a redundant bit is added later, where the redundant bit may be '0' or '1'.

And the scheme is as follows: the ACK/NACK indication of the terminal is in a form of Bitmap in the feedback information, and the bit number of the Bitmap is higher than a threshold value. As shown in fig. 3D, the ACK/NACK indication indicates on which uplink transmission resources the base station receives the uplink transmission of the terminal in the current feedback period. In Bitmap, each uplink transmission opportunity of a terminal corresponds to a 1-bit indication. And transmitting feedback information by adopting the PDSCH, and scheduling the PDSCH by using the DCI format 1. The scheme is suitable for a scene that a user has multiple transmission opportunities in a feedback period. The fourth scheme mainly considers the problem of bit number limitation of the DCI.

Step S208, the base station sends corresponding feedback cycle, feedback time, position of the ACK/NACK indication information in the feedback information, ACK/NACK feedback scheme, Group-RNTI and ACK/NACK indication information bit number to the terminal.

By combining the ACK/NACK feedback scheme and the number of bits of the ACK/NACK indication information, the position of the ACK/NACK indication information in the feedback information may indicate the starting position or the order of the ACK/NACK indication information in the feedback information, and the like, and does not need to indicate the position range occupied by the ACK/NACK indication information. In the case that the ACK/NACK feedback scheme is scheme one, it may not be necessary to indicate the number of ACK/NACK indication information bits.

The base station can send a corresponding feedback period, feedback time, the position of the ACK/NACK indication information in the feedback information, an ACK/NACK feedback scheme, Group-RNTI, the bit number of the ACK/NACK indication information and the like to the terminal through RRC signaling. An RRC information element may be added to the RRC protocol, where the information element includes a feedback period, a feedback time, a Group-RNTI, an ACK indication scheme (feedback scheme), an ACK indication bit number, and an ACK indication index (position in the feedback information), as shown in table 1.

TABLE 1

Group-basedACKIndicationConfig information element

The left column in table 1 shows the configured parameters, and the right column shows the format and range of the corresponding parameters. The feedback period (feedback-Periodicity) is an ENUMERATED value (estimated), the feedback time (feedback-Timing-Offset) is an Integer (Integer), the Group-RNTI is a BIT STRING (BIT STRING), the ACK Indication scheme (ACK-Indication-operation) comprises four types (Option1, Option2, Option3 and Option4), the ACK Indication BIT Number (ACK-Indication-Number-of-BITs) is an Integer (Integer), and the ACK Indication Index (ACK-Indication-Index) is an Integer (Integer).

Step S210, the base station generates ACK/NACK indication information in the feedback period corresponding to the terminal according to the received uplink transmission condition of the terminal in the corresponding feedback period and the ACK/NACK feedback scheme.

Step S212, the base station generates feedback information for the terminal group according to the position of the ACK/NACK indication information corresponding to each terminal in the same terminal group in the feedback information.

In some embodiments, in the case that the feedback information is feedback information transmitted through common DCI, scrambling the feedback information corresponding to the terminal Group using a Group-RNTI corresponding to the terminal Group. For example, in other embodiments, in the case that the feedback information is feedback information transmitted through a PDSCH, the Group-RNTI corresponding to the terminal Group is used to scramble the DCI scheduling the feedback information corresponding to the terminal Group.

For example, when the above-mentioned schemes one, two, and three are adopted, the feedback information is, for example, DCI format 2-2. DCI format 2-2 scrambled by Group-RNTI configured by RRC information unit can be used for transmission of feedback information based on terminal Group in non-scheduling uplink transmission. Under the fourth scheme, for example, the DCI format 1 is scrambled by using the Group-RNTI configured by the RRC information unit to schedule the PDSCH for transmission based on the feedback information of the terminal Group in the non-scheduling uplink transmission. The scrambled feedback information or the scheduling information of the feedback information improves the safety of information transmission, and the terminal descrambles the information according to the Group-RNTI in the subsequent process, so that the feedback information of different terminal groups can be distinguished, the corresponding ACK/NACK indication information can be accurately obtained, and the information confusion is avoided.

Step S214, the base station sends corresponding feedback information to the terminal group according to the feedback cycle and the feedback time corresponding to the terminal group.

Step S216, the terminal receives the feedback information according to the feedback cycle and the feedback time, and analyzes the feedback information according to the position of the ACK/NACK indication information in the feedback information, the ACK/NACK feedback scheme, the Group-RNTI and the bit number of the ACK/NACK indication information to obtain the corresponding ACK/NACK indication information.

For example, the terminal receives the DCI format 2-2 or the DCI format 1 in the corresponding feedback period and feedback time, and descrambles the information according to the Group-RNTI configured by the RRC. For DCI format 2-2, the terminal determines the position of feedback information belonging to the terminal according to ACK-Indication-Number-of-Bits and ACK-Indication-Index configured in the RRC information unit, the terminal determines the format of the feedback information according to the ACK-Indication-operation configured in the information unit, and if the ACK-Indication-operation is 1, the feedback information of each terminal is 1bit, which represents whether the base station receives uplink transmission of the terminal in the feedback period; if ACK-Indication-Option 2 is set, the feedback information of each terminal represents the number of uplink transmissions of the terminal received by the base station in the feedback period; if ACK-Indication-Option is 3, the feedback information of each terminal is in a Bitmap form, and each bit represents the reception condition on each transmission resource in the feedback period. According to the information terminals, the feedback information can be accurately analyzed, and whether the uplink transmission is received by the base station or not is known.

For the DCI format 1, the terminal acquires scheduling information of the PDSCH from the DCI format 1 and further analyzes the PDSCH. If the RRC information unit configures ACK-Indication-Option 4, the terminal determines the position of the feedback information according to ACK-Indication-Number-of-Bits and ACK-Indication-Index configured in the RRC information unit, and the feedback information of each terminal is in a Bitmap form, and each bit represents the receiving condition on each transmission resource in the feedback period. According to the information terminals, the feedback information can be accurately analyzed, and whether the uplink transmission is received by the base station or not is known.

Steps S202 to S208 may be steps executed when the base station negotiates with the terminal in an initial stage, and through these steps, the base station generates a feedback scheme for the terminal, and the terminal learns the feedback scheme of itself. Steps S210 to S216 may be steps performed by the base station and the terminal in each feedback period.

According to the method of the embodiment, different feedback schemes are formulated for the terminal according to different uplink transmission conditions of the terminal, and the configuration of an ACK/NACK feedback scheme, a Group-RNTI, an ACK/NACK indication information bit and the like is further matched, so that the feedback schemes can adapt to different types of terminals, the terminals can accurately analyze the ACK/NACK indication information of the terminals, the success rate and the reliability of uplink transmission are further improved, and the resource utilization rate of downlink physical information is improved.

Some application examples of the disclosed ACK/NACK feedback method are described below in conjunction with fig. 4A-4D.

Application example 1: in the application example, the ACK/NACK feedback is carried out by adopting the first scheme under the scene that each terminal in the terminal group in the feedback period has only one transmission opportunity. The terminals 1, 2, 3 are a terminal group, and each of the terminals 1, 2, 3 has an uplink transmission opportunity in each feedback period. The RRC configuration ACK Indication scheme is a first scheme, where the number of bits of the RRC configuration ACK Indication is 1, the ACK-Indication-Index of the RRC configuration terminal 1 is 1, the ACK-Indication-Index of the terminal 2 is 2, and the ACK-Indication-Index of the terminal 3 is 3, and according to the first scheme, taking '0' as an example that the base station receives the uplink transmission of the terminal, and '1' as an example that the base station does not receive the uplink transmission of the terminal. If the base station receives the uplink transmission information of the terminals 2 and 3 and does not receive the uplink transmission information of the terminal 1 in the current feedback period, the form of the feedback information is as shown in fig. 4A.

Application example 2: in the application example, when a scene that the terminal has multiple transmission opportunities exists in the group in the feedback period, the ACK/NACK feedback is carried out by adopting the scheme two. The terminals 1, 2 and 3 are a terminal group, the terminal 1 has two uplink transmission opportunities in each feedback period, and the terminals 2 and 3 have one uplink transmission opportunity respectively. The scheme of RRC configuration ACK indication is scheme two, and the number of bits of RRC configuration ACK indication is 2, which indicates the number of uplink transmissions received by the terminal. The RRC configures ACK-Indication-Index of terminal 1 to be 1, ACK-Indication-Index of terminal 2 to be 2, and ACK-Indication-Index of terminal 3 to be 3. According to the method of the second scheme, if the base station receives the primary uplink transmission information of the terminals 2 and 3 and only receives the primary uplink transmission information of the terminal 1 in the current feedback period, the form of the feedback information is as shown in fig. 4B.

Application example 3: in the application example, when a scene that multiple transmission opportunities exist in the terminal in a feedback period exists, the ACK/NACK feedback is carried out by adopting the third scheme. The terminals 1, 2 and 3 are a terminal group, the terminal 1 has two uplink transmission opportunities in each feedback period, and the terminals 2 and 3 have one uplink transmission opportunity respectively. The RRC configuration ACK Indication scheme is scheme three, where the RRC configuration ACK Indication bit number is 2, the ACK-Indication-Index of the RRC configuration terminal 1 is 1, the ACK-Indication-Index of the terminal 2 is 2, and the ACK-Indication-Index of the terminal 3 is 3. Taking '1' in Bitmap to represent that the uplink transmission is received at the corresponding uplink transmission opportunity, taking '0' in Bitmap to represent that the uplink transmission is not received at the corresponding uplink transmission opportunity, and taking the redundant bit filled with '0' as an example, according to the method of the third scheme, if the base station receives the uplink transmission information of the terminal 1 twice and receives the uplink transmission information of the terminals 2 and 3 once in the current feedback period, the form of the feedback information is as shown in fig. 4C.

Application example 4: in the application example, when a scene that multiple transmission opportunities exist in the terminal in a feedback period exists, the ACK/NACK feedback is carried out by adopting the scheme four. The terminals 1, 2, 3 are a terminal group, the terminal 1 has five uplink transmission opportunities in each feedback period, and the terminals 2, 3 have two uplink transmission opportunities respectively. The RRC configuration ACK Indication scheme is scheme four, where the number of bits of the RRC configuration ACK Indication is 5, the ACK-Indication-Index of the RRC configuration terminal 1 is 1, the ACK-Indication-Index of the terminal 2 is 2, and the ACK-Indication-Index of the terminal 3 is 3. Take '1' in Bitmap to represent that the uplink transmission is received at the corresponding uplink transmission opportunity, and take '0' in Bitmap to represent that the uplink transmission is not received at the corresponding uplink transmission opportunity, and take the example that the redundancy bits are filled with '0'. According to the method of the fourth aspect, if the base station receives five uplink transmissions received from terminal 1 in the current feedback period, but receives two uplink transmissions from terminals 2 and 3 after the fifth uplink transmission but fails in demodulation, the form of the feedback information is shown in fig. 4D.

The present disclosure also provides a base station, described below in conjunction with fig. 5.

Fig. 5 is a block diagram of some embodiments of a base station of the present disclosure. As shown in fig. 5, the base station 50 of this embodiment includes: a configuration information sending module 502, an indication information generating module 504, a feedback information generating module 506, and a feedback information sending module 508.

A configuration information sending module 502, configured to send a corresponding feedback period, feedback time, and a position of corresponding ACK/NACK indication information in the feedback information to the terminal; each terminal is divided into different terminal groups, and the feedback period and the feedback time corresponding to each terminal in the same terminal group are the same.

In some embodiments, the configuration information sending module 502 is configured to send the corresponding feedback cycle, feedback time and position of the corresponding ACK/NACK indication information in the feedback information to the terminal through radio resource control RRC signaling.

In some embodiments, the configuration information sending module 502 is further configured to send a corresponding ACK/NACK feedback scheme to the terminal, where the ACK/NACK feedback scheme is used to indicate a form and meaning of ACK/NACK indication information corresponding to the terminal.

In some embodiments, the configuration information sending module 502 is further configured to send the corresponding ACK/NACK indication information bit number to the terminal, so that the terminal obtains the corresponding ACK/NACK indication information according to the ACK/NACK indication information bit number.

An indication information generating module 504, configured to generate, according to a received uplink transmission condition of the terminal in a corresponding feedback period, ACK/NACK indication information in the feedback period corresponding to the terminal.

And a feedback information generating module 506, configured to generate feedback information for the terminal group according to a position of the ACK/NACK indication information corresponding to each terminal in the same terminal group in the feedback information.

In some embodiments, in a case where each terminal in the terminal group has only one uplink transmission opportunity in a corresponding feedback period, the feedback information includes feedback information transmitted through common downlink control information DCI; and the ACK/NACK indication information in the feedback period corresponding to the terminal is used for indicating whether the base station receives the information of the uplink transmission of the terminal.

In some embodiments, in a case where a terminal of the terminal group has multiple uplink transmission opportunities in a corresponding feedback period, the feedback information includes feedback information transmitted through the common DCI; and the ACK/NACK indication information in the feedback period corresponding to the terminal is used for indicating the times of receiving the uplink transmission of the terminal by the base station.

In some embodiments, when a terminal of the terminal group has multiple uplink transmission opportunities in a corresponding feedback period, and the number of transmission opportunities is lower than a threshold, the feedback information includes feedback information transmitted through the common DCI; and the ACK/NACK indication information in the feedback period corresponding to the terminal is a bitmap, and each bit of the bitmap is used for indicating whether the base station receives a primary uplink transmission opportunity corresponding to the terminal.

In some embodiments, when a terminal of a terminal group performs multiple uplink transmissions in a corresponding feedback period and the number of transmissions is higher than a threshold, the feedback information includes feedback information transmitted through a physical downlink shared channel PDSCH; and the ACK/NACK indication information in the feedback period corresponding to the terminal is a bitmap, and each bit of the bitmap is used for indicating whether the base station receives a primary uplink transmission opportunity corresponding to the terminal.

In some embodiments, the configuration information sending module 502 is further configured to send a corresponding Group radio network temporary identifier Group-RNTI to the terminal, where the Group-RNTIs of the terminals in the same terminal Group are the same. The feedback information generating module 506 is further configured to scramble the feedback information corresponding to the terminal Group by using the Group-RNTI corresponding to the terminal Group when the feedback information is the feedback information transmitted through the common DCI; or under the condition that the feedback information is the feedback information transmitted through the PDSCH, scrambling DCI (downlink control information) scheduling the feedback information corresponding to the terminal Group by using the Group-RNTI corresponding to the terminal Group.

The feedback information sending module 508 sends corresponding feedback information to the terminal group according to the feedback cycle and the feedback time corresponding to the terminal group, so that each terminal can obtain corresponding ACK/NACK indication information.

In some embodiments, the base station 50 further comprises: the configuration information determining module 510 is configured to divide the terminals into different terminal groups according to the time delay requirement of the terminals and the resource information of the uplink transmission, and determine a feedback period and a feedback time for the base station to perform feedback on the terminals.

In some embodiments, the configuration information determining module 510 is configured to determine the feedback time ranges of the terminals according to the delay requirements of the terminals and the resource information of the uplink transmission, and divide the terminals with overlapping feedback time ranges into the same terminal group. The feedback time range should meet the delay requirement of the terminal. The feedback time is an available downlink time slot or symbol after a time domain position occupied by uplink transmission of the terminal.

The present disclosure also provides a terminal, described below in conjunction with fig. 6.

Fig. 6 is a block diagram of some embodiments of the terminal of the present disclosure. As shown in fig. 6, the terminal 60 of this embodiment includes: a configuration information receiving module 602, a feedback information receiving module 604, and an information analyzing module 606.

A configuration information receiving module 602, configured to receive a feedback period and a feedback time corresponding to a base station and a position of corresponding ACK/NACK indication information in the feedback information; each terminal is divided into different terminal groups, and the feedback period and the feedback time corresponding to each terminal in the same terminal group are the same.

In some embodiments, the configuration information receiving module 602 is configured to receive, through radio resource control RRC signaling, a position of a feedback information in which a base station transmits a corresponding feedback cycle, a feedback time, and corresponding ACK/NACK indication information.

A feedback information receiving module 604, configured to receive feedback information sent by the base station according to the corresponding feedback period and feedback time.

And an information analyzing module 606, configured to analyze the feedback information according to a position of the ACK/NACK indication information in the feedback information, and obtain corresponding ACK/NACK indication information.

In some embodiments, the configuration information receiving module 602 is further configured to receive a corresponding ACK/NACK feedback scheme sent by the base station, where the ACK/NACK feedback scheme is used to indicate a form and meaning of corresponding ACK/NACK indication information of the terminal. The information parsing module 606 is configured to parse the feedback information according to the corresponding ACK/NACK feedback scheme and the position of the ACK/NACK indication information in the feedback information.

In some embodiments, the configuration information receiving module 602 is further configured to receive a corresponding number of ACK/NACK indication information bits sent by the base station. The information analyzing module 606 is configured to analyze the feedback information according to the corresponding ACK/NACK feedback scheme, the number of bits of the ACK/NACK indication information, and the position of the ACK/NACK indication information in the feedback information.

In some embodiments, the configuration information receiving module 602 is further configured to receive a Group radio network temporary identifier Group-RNTI sent by the base station, where the Group-RNTIs of the terminals in the same terminal Group are the same. The information parsing module 606 is configured to descramble the feedback information by using the corresponding Group-RNTI when the feedback information is the feedback information transmitted through the common DCI, and parse the feedback information according to a position of the ACK/NACK indication information in the feedback information; or when the feedback information is the feedback information transmitted by the PDSCH, descrambling the DCI which is the inverse scheduling feedback information by using the corresponding Group-RNTI, and analyzing the feedback information according to the position of the ACK/NACK indication information in the feedback information.

The ACK/NACK feedback devices (base stations or terminals) in the embodiments of the present disclosure may each be implemented by various computing devices or computer systems, which are described below in conjunction with fig. 7 and 8.

Fig. 7 is a block diagram of some embodiments of the ACK/NACK feedback apparatus of the present disclosure. As shown in fig. 7, the apparatus 70 of this embodiment includes: a memory 710 and a processor 720 coupled to the memory 710, the processor 720 configured to perform any of the steps of the ACK/NACK feedback method in any of the embodiments of the disclosure based on instructions stored in the memory 710.

Memory 710 may include, for example, system memory, fixed non-volatile storage media, and the like. The system memory stores, for example, an operating system, an application program, a Boot Loader (Boot Loader), a database, and other programs.

Fig. 8 is a block diagram of further embodiments of the ACK/NACK feedback apparatus of the present disclosure. The ACK/NACK feedback means may be a base station or a terminal. As shown in fig. 8, the apparatus 80 of this embodiment includes: memory 810 and processor 820 are similar to memory 710 and processor 720, respectively. An input output interface 830, a network interface 840, a storage interface 850, and the like may also be included. These

interfaces

830, 840, 850 and the memory 810 and the processor 820 may be connected, for example, by a bus 860. The input/output interface 830 provides a connection interface for input/output devices such as a display, a mouse, a keyboard, and a touch screen. The network interface 840 provides a connection interface for various networked devices, such as a database server or a cloud storage server. The storage interface 850 provides a connection interface for external storage devices such as an SD card and a usb disk.

The present disclosure also provides an ACK/NACK feedback system, which is described below in conjunction with fig. 9.

Fig. 9 is a block diagram of some embodiments of the ACK/NACK feedback system of the present disclosure. As shown in fig. 9, the system 9 includes the base station 50 and the terminal 60 in any of the embodiments described above.

As will be appreciated by one skilled in the art, embodiments of the present disclosure may be provided as a method, system, or computer program product. Accordingly, the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present disclosure may take the form of a computer program product embodied on one or more computer-usable non-transitory 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 disclosure is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the disclosure. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

The above description is only exemplary of the present disclosure and is not intended to limit the present disclosure, so that any modification, equivalent replacement, or improvement made within the spirit and principle of the present disclosure should be included in the scope of the present disclosure.

Claims

1. An ACK/NACK feedback method, comprising:

sending a corresponding feedback period, feedback time and a position of corresponding ACK/NACK indication information in the feedback information to the terminal; each terminal is divided into different terminal groups, and the feedback period and the feedback time corresponding to each terminal in the same terminal group are the same;

according to the received uplink transmission condition of the terminal in the corresponding feedback period, generating ACK/NACK indication information in the feedback period corresponding to the terminal;

generating feedback information for the terminal group according to the position of the ACK/NACK indication information corresponding to each terminal in the same terminal group in the feedback information;

sending corresponding feedback information to the terminal group according to the feedback period and the feedback time corresponding to the terminal group so that each terminal can obtain corresponding ACK/NACK indication information;

under the condition that the terminals of the terminal group have multiple uplink transmission opportunities in a corresponding feedback period, the feedback information comprises feedback information transmitted through the public DCI; the ACK/NACK indication information in the feedback period corresponding to the terminal is used for indicating the times of receiving the uplink transmission of the terminal by the base station; or under the condition that the terminals of the terminal group have multiple uplink transmission opportunities in the corresponding feedback period and the number of the transmission opportunities is lower than a threshold value, the feedback information comprises feedback information transmitted through the public DCI; the ACK/NACK indication information in the feedback period corresponding to the terminal is a bitmap, and each bit of the bitmap is used for indicating whether the base station receives a primary uplink transmission opportunity corresponding to the terminal; or under the condition that the terminals of the terminal group perform uplink transmission for multiple times in the corresponding feedback period and the transmission times are higher than a threshold value, the feedback information comprises feedback information transmitted through a Physical Downlink Shared Channel (PDSCH); and the ACK/NACK indication information in the feedback period corresponding to the terminal is a bitmap, and each bit of the bitmap is used for indicating whether the base station receives a primary uplink transmission opportunity corresponding to the terminal.

2. The ACK/NACK feedback method of claim 1, wherein the transmitting the corresponding feedback period, feedback time, and position of the corresponding acknowledgement or negative acknowledgement ACK/NACK indication information in the feedback information to the terminal comprises:

and sending a corresponding feedback period, a feedback time and a position of corresponding acknowledgement or negative acknowledgement (ACK/NACK) indication information in the feedback information to the terminal through Radio Resource Control (RRC) signaling.

3. The ACK/NACK feedback method of claim 1, further comprising:

and sending a corresponding ACK/NACK feedback scheme to the terminal, wherein the ACK/NACK feedback scheme is used for indicating the form and meaning of ACK/NACK indication information corresponding to the terminal.

4. The ACK/NACK feedback method of claim 3, further comprising:

and sending the corresponding ACK/NACK indication information bit number to the terminal so that the terminal can acquire the corresponding ACK/NACK indication information according to the ACK/NACK indication information bit number.

5. The ACK/NACK feedback method of claim 1, further comprising:

dividing the terminal into different terminal groups according to the time delay requirement of the terminal and the uplink transmission resource information, and determining the feedback period and the feedback time of the base station for feeding back the terminal.

6. The ACK/NACK feedback method according to claim 5, wherein,

the dividing the terminal into different terminal groups according to the time delay requirement of the terminal and the uplink transmission resource information comprises:

determining the feedback time range of the terminal according to the time delay requirement of the terminal and the uplink transmission resource information, and dividing the terminals with overlapped feedback time ranges into the same terminal group;

the feedback time range meets the time delay requirement of the terminal;

the feedback time is an available downlink time slot or symbol after a time domain position occupied by uplink transmission of the terminal.

7. The ACK/NACK feedback method of claim 1, further comprising:

sending corresponding Group radio network temporary identifiers (Group-RNTIs) to the terminals, wherein the Group-RNTIs of the terminals in the same terminal Group are the same;

scrambling the feedback information corresponding to the terminal Group by using the Group-RNTI corresponding to the terminal Group under the condition that the feedback information is transmitted through the common DCI; or

And under the condition that the feedback information is the feedback information transmitted through the PDSCH, scrambling DCI (downlink control information) scheduling the feedback information corresponding to the terminal Group by using the Group-RNTI corresponding to the terminal Group.

8. An ACK/NACK feedback method, comprising:

the terminal receives the feedback cycle, the feedback time and the position of the corresponding ACK/NACK indication information in the feedback information sent by the base station; each terminal is divided into different terminal groups, and the feedback period and the feedback time corresponding to each terminal in the same terminal group are the same;

the terminal receives feedback information sent by the base station according to the corresponding feedback cycle and the corresponding feedback time; the base station generates ACK/NACK indication information in a feedback period corresponding to the terminal according to the received uplink transmission condition of the terminal in the corresponding feedback period, and generates feedback information for the terminal group according to the position of the ACK/NACK indication information corresponding to each terminal in the same terminal group in the feedback information; under the condition that the terminals of the terminal group have multiple uplink transmission opportunities in a corresponding feedback period, the feedback information comprises feedback information transmitted through the public DCI; the ACK/NACK indication information in the feedback period corresponding to the terminal is used for indicating the times of receiving the uplink transmission of the terminal by the base station; or under the condition that the terminals of the terminal group have multiple uplink transmission opportunities in the corresponding feedback period and the number of the transmission opportunities is lower than a threshold value, the feedback information comprises feedback information transmitted through the public DCI; the ACK/NACK indication information in the feedback period corresponding to the terminal is a bitmap, and each bit of the bitmap is used for indicating whether the base station receives a primary uplink transmission opportunity corresponding to the terminal; or under the condition that the terminals of the terminal group perform uplink transmission for multiple times in the corresponding feedback period and the transmission times are higher than a threshold value, the feedback information comprises feedback information transmitted through a Physical Downlink Shared Channel (PDSCH); the ACK/NACK indication information in the feedback period corresponding to the terminal is a bitmap, and each bit of the bitmap is used for indicating whether the base station receives a primary uplink transmission opportunity corresponding to the terminal;

and the terminal analyzes the feedback information according to the position of the ACK/NACK indication information in the feedback information to acquire the corresponding ACK/NACK indication information.

9. The ACK/NACK feedback method according to claim 8, wherein,

and the terminal receives the corresponding feedback cycle, the feedback time and the position of the corresponding acknowledgement or negative acknowledgement (ACK/NACK) indication information in the feedback information sent by the base station through a Radio Resource Control (RRC) signaling.

10. The ACK/NACK feedback method of claim 8, further comprising:

the terminal receives a corresponding ACK/NACK feedback scheme sent by the base station, wherein the ACK/NACK feedback scheme is used for indicating the form and meaning of ACK/NACK indication information corresponding to the terminal;

the analyzing, by the terminal, the feedback information according to the position of the ACK/NACK indication information in the feedback information includes:

and the terminal analyzes the feedback information according to the corresponding ACK/NACK feedback scheme and the position of the ACK/NACK indication information in the feedback information.

11. The ACK/NACK feedback method of claim 10, further comprising:

the terminal receives the bit number of the corresponding ACK/NACK indication information sent by the base station;

and the terminal analyzes the feedback information according to the corresponding ACK/NACK feedback scheme, the bit number of the ACK/NACK indication information and the position of the ACK/NACK indication information in the feedback information.

12. The ACK/NACK feedback method of claim 8, further comprising:

the terminal receives a corresponding Group radio network temporary identifier Group-RNTI sent by the base station, and the Group-RNTIs of the terminals in the same terminal Group are the same;

the terminal descrambles the feedback information by using the corresponding Group-RNTI under the condition that the feedback information is transmitted through the public DCI, and analyzes the feedback information according to the position of the ACK/NACK indication information in the feedback information; or

And the terminal descrambles the DCI which is the reverse scheduling feedback information by using the corresponding Group-RNTI under the condition that the feedback information is the feedback information transmitted by the PDSCH, and analyzes the feedback information according to the position of the ACK/NACK indication information in the feedback information.

13. A base station, comprising:

a configuration information sending module, configured to send a corresponding feedback period, feedback time, and a position of corresponding ACK/NACK indication information in the feedback information to the terminal; each terminal is divided into different terminal groups, and the feedback period and the feedback time corresponding to each terminal in the same terminal group are the same;

an indication information generating module, configured to generate, according to a received uplink transmission condition of the terminal in a corresponding feedback period, ACK/NACK indication information in the feedback period corresponding to the terminal;

the feedback information generating module is used for generating feedback information for the terminal group according to the position of the ACK/NACK indication information corresponding to each terminal in the same terminal group in the feedback information;

the feedback information sending module sends corresponding feedback information to the terminal group according to the feedback period and the feedback time corresponding to the terminal group so that each terminal can obtain corresponding ACK/NACK indication information;

14. The base station of claim 13, wherein,

the configuration information sending module is used for sending a corresponding feedback period, feedback time and a position of corresponding acknowledgement or negative acknowledgement (ACK/NACK) indication information in the feedback information to the terminal through Radio Resource Control (RRC) signaling.

15. The base station of claim 13, wherein,

the configuration information sending module is further configured to send a corresponding ACK/NACK feedback scheme to the terminal, where the ACK/NACK feedback scheme is used to indicate a form and meaning of ACK/NACK indication information corresponding to the terminal.

16. The base station of claim 15, wherein,

the configuration information sending module is further configured to send the corresponding bit number of the ACK/NACK indication information to the terminal, so that the terminal can obtain the corresponding ACK/NACK indication information according to the bit number of the ACK/NACK indication information.

17. The base station of claim 13, further comprising:

and the configuration information determining module is used for dividing the terminal into different terminal groups according to the time delay requirement of the terminal and the uplink transmission resource information, and determining the feedback cycle and the feedback time for the base station to feed back the terminal.

18. The base station of claim 17, wherein,

the configuration information determining module is used for determining the feedback time range of the terminal according to the time delay requirement of the terminal and the uplink transmission resource information, and dividing the terminals with overlapped feedback time ranges into the same terminal group;

the feedback time range meets the time delay requirement of the terminal;

19. The base station of claim 13, wherein,

the configuration information sending module is also used for sending corresponding Group radio network temporary identifiers (Group-RNTIs) to the terminals, and the Group-RNTIs of the terminals in the same terminal Group are the same;

the feedback information generating module is further used for scrambling the feedback information corresponding to the terminal Group by using the Group-RNTI corresponding to the terminal Group under the condition that the feedback information is the feedback information transmitted through the public DCI; or under the condition that the feedback information is the feedback information transmitted through the PDSCH, scrambling DCI (downlink control information) scheduling the feedback information corresponding to the terminal Group by using the Group-RNTI corresponding to the terminal Group.

20. A terminal, comprising:

a configuration information receiving module, configured to receive a feedback cycle, a feedback time and a position of corresponding ACK/NACK indication information in the feedback information, where the feedback cycle and the feedback time correspond to a base station; each terminal is divided into different terminal groups, and the feedback period and the feedback time corresponding to each terminal in the same terminal group are the same;

a feedback information receiving module, configured to receive feedback information sent by the base station according to a corresponding feedback cycle and feedback time; the base station generates ACK/NACK indication information in a feedback period corresponding to the terminal according to the received uplink transmission condition of the terminal in the corresponding feedback period, and generates feedback information for the terminal group according to the position of the ACK/NACK indication information corresponding to each terminal in the same terminal group in the feedback information; under the condition that the terminals of the terminal group have multiple uplink transmission opportunities in a corresponding feedback period, the feedback information comprises feedback information transmitted through the public DCI; the ACK/NACK indication information in the feedback period corresponding to the terminal is used for indicating the times of receiving the uplink transmission of the terminal by the base station; or under the condition that the terminals of the terminal group have multiple uplink transmission opportunities in the corresponding feedback period and the number of the transmission opportunities is lower than a threshold value, the feedback information comprises feedback information transmitted through the public DCI; the ACK/NACK indication information in the feedback period corresponding to the terminal is a bitmap, and each bit of the bitmap is used for indicating whether the base station receives a primary uplink transmission opportunity corresponding to the terminal; or under the condition that the terminals of the terminal group perform uplink transmission for multiple times in the corresponding feedback period and the transmission times are higher than a threshold value, the feedback information comprises feedback information transmitted through a Physical Downlink Shared Channel (PDSCH); the ACK/NACK indication information in the feedback period corresponding to the terminal is a bitmap, and each bit of the bitmap is used for indicating whether the base station receives a primary uplink transmission opportunity corresponding to the terminal;

and the information analysis module is used for analyzing the feedback information according to the position of the ACK/NACK indication information in the feedback information to acquire the corresponding ACK/NACK indication information.

21. The terminal of claim 20, wherein,

the configuration information receiving module is used for receiving the corresponding feedback cycle, the feedback time and the position of the corresponding acknowledgement or negative acknowledgement (ACK/NACK) indication information in the feedback information sent by the base station through Radio Resource Control (RRC) signaling.

22. The terminal of claim 20, wherein,

the configuration information receiving module is further configured to receive a corresponding ACK/NACK feedback scheme sent by the base station, where the ACK/NACK feedback scheme is used to indicate a form and meaning of ACK/NACK indication information corresponding to a terminal;

and the information analysis module is used for analyzing the feedback information according to the corresponding ACK/NACK feedback scheme and the position of the ACK/NACK indication information in the feedback information.

23. The terminal of claim 22, wherein,

the configuration information receiving module is further configured to receive a bit number of corresponding ACK/NACK indication information sent by the base station;

the information analysis module is used for analyzing the feedback information according to the corresponding ACK/NACK feedback scheme, the bit number of the ACK/NACK indication information and the position of the ACK/NACK indication information in the feedback information.

24. The terminal of claim 20, wherein,

the configuration information receiving module is also used for receiving a corresponding Group radio network temporary identifier Group-RNTI sent by the base station, and the Group-RNTIs of the terminals in the same terminal Group are the same;

the information analysis module is used for descrambling the feedback information by using the corresponding Group-RNTI under the condition that the feedback information is the feedback information transmitted through the public DCI, and analyzing the feedback information according to the position of the ACK/NACK indication information in the feedback information; or when the feedback information is the feedback information transmitted by the PDSCH, descrambling the DCI which is the inverse scheduling feedback information by using the corresponding Group-RNTI, and analyzing the feedback information according to the position of the ACK/NACK indication information in the feedback information.

25. A base station, comprising:

a memory; and

a processor coupled to the memory, the processor configured to perform the ACK/NACK feedback method of any of claims 1-7 based on instructions stored in the memory device.

26. A terminal, comprising:

a memory; and

a processor coupled to the memory, the processor configured to perform the ACK/NACK feedback method of any of claims 8-12 based on instructions stored in the memory device.

27. A computer-readable storage 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 12.

28. An ACK/NACK feedback system, comprising: the base station of any of claims 13-19 or 25, and the terminal of any of claims 20-24 or 26.