CN107919948B

CN107919948B - Transmission control method, base station and terminal for downlink receiving feedback information

Info

Publication number: CN107919948B
Application number: CN201610880810.XA
Authority: CN
Inventors: 柯颋; 胡丽洁; 侯雪颖; 刘建军
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Priority date: 2016-10-09
Filing date: 2016-10-09
Publication date: 2020-03-20
Anticipated expiration: 2036-10-09
Also published as: CN107919948A

Abstract

The invention provides a transmission control method, a base station and a terminal for downlink receiving feedback information. In the invention, the base station can determine the uplink feedback time domain position according to various determination modes and inform the terminal of the determination mode of the uplink feedback time domain position, so that the terminal can determine the uplink feedback time domain position according to the determination mode, thereby changing the traditional fixed feedback time sequence relation, and the base station can flexibly select the uplink time domain feedback position, thereby realizing the flexible feedback timing relation of downlink receiving feedback information, and being applicable to a communication system adopting a flexible frame structure.

Description

Transmission control method, base station and terminal for downlink receiving feedback information

Technical Field

The invention relates to the technical field of mobile communication, in particular to a transmission control method, a base station and a terminal for downlink receiving feedback information.

Background

In the existing LTE system, the base station (eNB) uses a fixed frame structure, i.e. the uplink and downlink directions of any subframe in a radio frame are predefined and cannot be changed dynamically.

In particular, for LTE FDD systems, the uplink component carriers use only uplink subframes, while the downlink component carriers use only downlink subframes. For the LTE TDD system, a base station selects a certain uplink and downlink subframe configuration relationship in advance, and once the uplink and downlink subframe configuration relationship is selected, the uplink and downlink subframe configuration relationship cannot be dynamically changed. The uplink and downlink subframe configurations available for the LTE TDD system are shown in table 1 below:

TABLE 1

In particular, in the conventional LTE system, in order to reduce signaling indication overhead, a fixed downlink reception feedback information (DL ACK/NACK) feedback timing relationship is defined for each fixed frame structure and for a Hybrid Automatic Repeat reQuest (HARQ), that is, a fixed timing relationship exists between Physical Downlink Shared CHannel (PDSCH) transmission and corresponding reception feedback information (ACK/NACK) feedback.

In particular, for FDD, if a terminal (UE) detects a PDSCH transmission on Downlink (DL) subframe n-4, the UE may reply with a receive feedback information (ACK/NACK) in UL subframe n.

In particular, for TDD, if the UE detects a PDSCH transmission on a Downlink (DL) subframe n-k, the UE will reply with a receive feedback information (ACK/NACK) on an Uplink (UL) subframe n, where the value of k is defined in table 2 below. Therefore, unlike the PDSCH transmitted by only one DL subframe corresponding to the reception feedback information (ACK/NACK) transmitted by one UL subframe of the FDD system, in the TDD system, the PDSCH transmitted by a plurality of DL subframes may need to reply with the reception feedback information (ACK/NACK) in the same UL subframe. However, in both FDD and TDD systems, there is a fixed timing relationship between PDSCH transmission and corresponding ACK/NACK feedback.

TABLE 2TDD Downlink related K value K: { K₀,k₁,…k_M-1}

In order to better support the dynamic change of the service load, a flexible frame structure technology is researched in a 5G New air interface (NR) technology, namely, a base station is allowed to dynamically use uplink and downlink subframes according to the change of the service load.

For example, in the 5G NR, a conventional FDD system is enhanced, that is, in order to meet a traffic load requirement, a small number of uplink subframes are allowed to be transmitted on a component carrier whose lower part is a main carrier, and a small number of downlink subframes are transmitted on a component carrier whose upper part is a main carrier. Therefore, in a strict sense, the FDD system in 5G NR is a special TDD system using symmetric component carriers.

In the 5G NR, the conventional TDD system is also enhanced, that is, the base station does not strictly adhere to a predetermined frame structure, but may dynamically use uplink and downlink subframes according to the change of the traffic load.

Since the 5G NR supports flexible frame structures, the traditional deterministic DL ACK/NACK feedback timing relationship based on fixed frame structure design will no longer apply. Fig. 1-2 are schematic diagrams illustrating a downlink reception feedback information (DL ACK/NACK) feedback timing problem under a conventional frame structure and a flexible frame structure. For example, fig. 1 shows a DL ACK/NACK feedback timing relationship designed according to an uplink and downlink configuration mode 1 in a conventional LTE system, and it is obvious that the timing relationship can normally work in the uplink and downlink configuration mode 1. However, as shown in fig. 2, when the above timing relationship is used for the flexible frame structure, since some UL subframes originally dedicated for feeding back DL ACK/NACK are dynamically changed to DL subframes (see subframes shown by black boxes), the corresponding DL ACK/NACK information loses the feedback opportunity, and thus the 5G NR cannot normally operate.

It can be seen that when a flexible frame structure is used, the traditional deterministic DL ACK/NACK feedback timing relationship based on a fixed frame structure design will no longer apply. Therefore, in 5G NR, a more flexible DL ACK/NACK feedback timing relationship needs to be studied.

Disclosure of Invention

The technical problem to be solved in the embodiments of the present invention is to provide a transmission control method, a base station, and a terminal for downlink reception feedback information, so as to implement a flexible feedback timing relationship for downlink reception feedback information.

To solve the above technical problem, a method for controlling transmission of downlink reception feedback information according to an embodiment of the present invention includes:

a base station determines an uplink feedback time domain position, wherein the uplink feedback time domain position is a time domain position for sending feedback information received by a first downlink transmission resource;

the base station determines an indication mode of an uplink feedback time domain position, wherein the indication mode of the uplink feedback time domain position is one of at least one uplink feedback time domain position determination mode configured in advance;

and the base station sends a first Downlink Control Information (DCI) signaling for scheduling the first downlink transmission resource to the terminal, wherein the first DCI signaling carries the indication information of the indication mode of the uplink feedback time domain position.

According to another aspect of the embodiments of the present invention, a method for controlling transmission of downlink reception feedback information is provided, including:

a terminal receives a first Downlink Control Information (DCI) signaling which is sent by a base station and used for scheduling a first downlink transmission resource, wherein the first DCI signaling carries indication information of an indication mode of an uplink feedback time domain position, the uplink feedback time domain position is a time domain position for sending the feedback information of the first downlink transmission resource, and the indication mode of the uplink feedback time domain position is one of at least one uplink feedback time domain position determination mode which is configured in advance;

and the terminal determines the indication mode of the uplink feedback time domain position according to the indication information and determines the uplink feedback time domain position according to the indication mode of the uplink feedback time domain position.

According to still another aspect of the embodiments of the present invention, there is provided a base station, including:

a feedback position determining unit, configured to determine an uplink feedback time domain position, where the uplink feedback time domain position is a time domain position for sending feedback information received from a first downlink transmission resource;

an indication mode determining unit, configured to determine an indication mode of an uplink feedback time domain position, where the indication mode of the uplink feedback time domain position is one of at least one uplink feedback time domain position determining mode configured in advance;

a first sending unit, configured to send, to the terminal, a first DCI signaling for scheduling the first downlink transmission resource, where the first DCI signaling carries indication information of an indication mode of the uplink feedback time domain position.

According to still another aspect of the embodiments of the present invention, there is provided a terminal including:

a first receiving unit, configured to receive a first downlink control information DCI signaling that is sent by a base station and used to schedule a first downlink transmission resource, where the first DCI signaling carries indication information of an indication manner of an uplink feedback time domain position, where the uplink feedback time domain position is a time domain position where feedback information of the first downlink transmission resource is sent, and the indication manner of the uplink feedback time domain position is one of at least one uplink feedback time domain position determination manner configured in advance;

an indication mode determining unit, configured to determine an indication mode of the uplink feedback time domain position according to the indication information;

and the feedback position determining unit is used for determining the uplink feedback time domain position according to the indication mode of the uplink feedback time domain position.

Compared with the prior art, the transmission control method for downlink reception feedback information, the base station and the terminal provided by the embodiment of the invention have the advantages that the base station can determine the uplink feedback time domain position according to various determination modes and inform the determination mode of the uplink feedback time domain position to the terminal, so that the terminal can determine the uplink feedback time domain position according to the determination mode, the traditional fixed feedback time sequence relation is changed, the base station can flexibly select the uplink time domain feedback position, the flexible feedback timing relation of the downlink reception feedback information is realized, and the method can be suitable for a communication system adopting a flexible frame structure.

Drawings

Fig. 1 is a schematic diagram illustrating a feedback timing problem of downlink reception feedback information in a conventional frame structure;

fig. 2 is a schematic diagram illustrating a feedback timing problem of downlink reception feedback information of a flexible frame structure;

fig. 3 is a flowchart illustrating a method for controlling transmission of downlink reception feedback information according to an embodiment of the present invention;

fig. 4 is another schematic flow chart of a transmission control method for downlink reception feedback information according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a base station according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a terminal according to an embodiment of the present invention;

fig. 7 is a schematic time domain diagram of a fixed uplink transmission unit according to an embodiment of the present invention;

FIGS. 8 a-8 b are exemplary diagrams of OFDM symbols and transmit power provided by embodiments of the present invention;

fig. 9 is a schematic diagram of a time domain location of a standby uplink transmission unit according to an embodiment of the present invention;

fig. 10a to 10b are examples of two application scenarios for performing uplink reception feedback by using a standby uplink transmission unit according to an embodiment of the present invention;

fig. 11 is an example of performing uplink reception feedback by using a temporary uplink transmission unit according to an embodiment of the present invention.

Detailed Description

In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments. In the following description, specific details such as specific configurations and components are provided only to help the full understanding of the embodiments of the present invention. Thus, it will be apparent to those skilled in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the invention. In addition, descriptions of well-known functions and constructions are omitted for clarity and conciseness.

It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

In various embodiments of the present invention, it should be understood that the sequence numbers of the following processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.

In addition, the terms "system" and "network" are often used interchangeably herein.

It should be understood that the term "and/or" herein is merely one type of association relationship that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

In the embodiments provided herein, it should be understood that "B corresponding to a" means that B is associated with a from which B can be determined. It should also be understood that determining B from a does not mean determining B from a alone, but may be determined from a and/or other information.

The embodiment of the invention provides a transmission control method of downlink receiving feedback information, which can be suitable for a communication system with a flexible frame structure, and particularly, a base station in the embodiment of the invention can dynamically adjust the time domain position of the downlink receiving feedback information by selecting a determination mode of a downlink receiving feedback information (DL ACK/NACK) feedback timing relation and carrying indication information of the determination mode in a DL resource scheduling DCI signaling, thereby being capable of effectively adapting to the application requirement of the 5G NR flexible frame structure.

Referring to fig. 3, a method for controlling transmission of downlink reception feedback information according to an embodiment of the present invention includes the following steps when applied to a base station side:

step 31, the base station determines an uplink feedback time domain position, where the uplink feedback time domain position is a time domain position for sending the feedback information received by the first downlink transmission resource.

Here, the base station may determine the uplink feedback time domain position according to at least one parameter of the processing capability of the terminal, the geographic position of the terminal in the cell to which the terminal belongs, the requirement of the feedback delay of the first downlink transmission resource, and the time domain position of the available fixed/standby/temporary uplink transmission unit.

Step 32, the base station determines an indication mode of the uplink feedback time domain position, wherein the indication mode of the uplink feedback time domain position is one of at least one uplink feedback time domain position determination mode configured in advance;

step 33, the base station sends a first downlink control information DCI signaling for scheduling the first downlink transmission resource to the terminal, where the first DCI signaling carries the indication information of the indication mode of the uplink feedback time domain position.

In the above step, the base station selects a certain manner from one or more pre-configured uplink feedback time domain position determining manners as an indication manner of an uplink feedback time domain position of the first downlink transmission resource (the terminal may calculate the uplink feedback time domain position according to the indication manner), and then carries indication information of the indication manner in a first DCI signaling for scheduling the first downlink transmission resource, so that the terminal determines a corresponding indication manner according to the indication information, and further calculates and determines the uplink feedback time domain position of the first downlink transmission resource. Subsequently, the terminal may send, at the uplink feedback time domain position, reception feedback information (ACK/NACK) of the first downlink transmission resource to the base station, and the base station receives, at the uplink feedback time domain position, the reception feedback information of the first downlink transmission resource sent by the terminal, and further performs HARQ processing.

It can be seen from the above steps that, the uplink feedback time domain position determination method according to the embodiment of the present invention may have a variety of manners, that is, the uplink feedback time domain position may have a variety of possibilities, and the base station may determine the uplink feedback time domain position according to various factors and notify the terminal of the manner of determining the uplink feedback time domain position, so that the terminal may determine the uplink feedback time domain position accordingly, thereby changing a conventional fixed feedback timing relationship, and the base station may flexibly select the uplink time domain feedback position, thereby being applicable to a communication system adopting a flexible frame structure.

In the embodiment of the present invention, at least one uplink feedback time domain position determination manner may be preconfigured on both the base station and the terminal side, so that when the base station indicates one of the determination manners through the first DCI signaling, the terminal may determine a specific uplink feedback time domain position according to the determination manner.

The uplink feedback time domain position determining method adopted by the embodiment of the invention can comprise one or more of the following methods:

1) a first determining manner, where the first determining manner is to determine, based on a first time domain position of a first DCI signaling, a time domain position of a fixed uplink transmission unit that meets a first preset rule, to obtain the uplink feedback time domain position, where a period and a time domain offset of the fixed uplink transmission unit are pre-configured.

Here, the uplink transmission resource of the fixed uplink transmission unit may be a transmission resource reserved in advance on the system bandwidth, for example, a transmission resource having a periodic occurrence. The time interval between the fixed uplink transmission unit and the first downlink transmission resource determined by the first preset rule is longer than a first preset time length so as to meet the requirements of terminal processing time delay and the like. The first preset time period may be set according to the processing capability of the terminal and other factors, or may be preset based on a predetermined standard.

2) And a second determination mode, where the second determination mode is to determine the uplink feedback time domain position according to time domain offset information carried by a second DCI signaling carrying HARQ process information of the first downlink transmission resource and/or a second time domain position for sending the second DCI signaling, where the second DCI signaling is sent to the terminal by the base station.

Here, the second DCI signaling is DCI signaling that is transmitted by the base station after the first DCI, may be scrambled by using a Radio Network Temporary Identity (RNTI) of the terminal, and includes HARQ process information of the first downlink transmission resource.

When the indication mode of the uplink feedback time domain position in step 32 is the second determination mode, the base station further sends, after sending the first DCI signaling, a second DCI signaling scrambled by using the RNTI of the terminal to the terminal, where the second DCI signaling includes HARQ process information (e.g., a process number) of the first downlink transmission resource, so that after receiving the second DCI signaling, the terminal can know that the signaling is a signaling related to the first downlink transmission resource, and then determine the uplink feedback time domain position based on the second DCI signaling. Here, the second DCI signaling may also carry time domain offset information.

3) A third determination mode, wherein the third determination mode is as follows: and determining the uplink feedback time domain position according to the time domain position of the first uplink scheduling resource which is within a preset time interval after the first DCI signaling and meets a second preset rule, wherein the preset time interval is positioned after the first time domain position of the first DCI signaling.

Here, the time interval between the first uplink scheduling resource and the first downlink transmission resource in a preset time interval after the first DCI signaling, which is determined by the second preset rule, is greater than a second preset time duration, so as to meet the requirements of terminal processing delay and the like. The second preset time period may be set according to the processing capability of the terminal and other factors, or may be preset based on a predetermined standard.

Here, if there is no uplink scheduling resource in a preset time interval after the first DCI signaling or there is no uplink scheduling resource satisfying the second preset rule, at this time, the base station may re-determine the uplink feedback time domain position, and specifically, may re-determine the uplink feedback time domain position according to any determination method described herein. Correspondingly, if the terminal finds that no uplink scheduling resource exists in a preset time interval after the first DCI signaling or no uplink scheduling resource meeting the second preset rule exists, the terminal will continue to wait for receiving the DCI signaling carrying the indication information of the indication mode of the uplink feedback time domain position, which is re-issued by the base station.

4) A fourth determination manner, wherein the fourth determination manner is: determining a first type of a standby uplink transmission unit according to first prompt information in a first DCI signaling, and determining a time domain position of the standby uplink transmission unit of the first type meeting a third preset rule based on the first time domain position of the first DCI signaling to obtain the uplink feedback time domain position, wherein at least one type of standby uplink transmission unit is pre-configured in a system bandwidth, each type of standby uplink transmission unit has different transmission cycles and/or delay offsets, and uplink transmission resources of the standby uplink transmission unit are allocated according to needs.

Here, the first hint information may be a value of the indication information field, where the indication information field has a plurality of values corresponding to the fourth determination manner, and each value corresponds to a type of the standby uplink transmission unit. And the interval between the standby uplink transmission unit of the first type and the first downlink transmission resource, which is determined by the third preset rule, is longer than a third preset time length so as to meet the requirements of terminal processing time delay and the like. The third preset time period may be set according to the processing capability of the terminal and other factors, or may be preset based on a predetermined standard.

5) A fifth determination manner, which is: and determining the time domain position of the temporary uplink transmission unit of the second type meeting a fourth preset rule based on time domain offset information carried by a third DCI signaling and/or a third time domain position for sending the third DCI signaling, so as to obtain the uplink feedback time domain position.

When the indication mode of the uplink feedback time domain position in step 32 is the fifth determination mode, after the first DCI signaling is sent, the base station further sends the third DCI signaling to the terminal, where the third DCI signaling is scrambled by using a cell common scrambling code and/or a terminal group scrambling code and includes third indication information of a second type of temporary uplink transmission unit identifier.

Here, the second hint information may be a value of the indication information field, where the indication information field has a plurality of values, and each value corresponds to a type of the temporary uplink transmission unit. And the interval between the second type of temporary uplink transmission unit and the third time domain position determined by the fourth preset rule is longer than a fourth preset time length so as to meet the requirements of terminal processing time delay and the like. The fourth preset time period may be set according to the processing capability of the terminal and other factors, or may be preset based on a predetermined standard.

Here, at least one type of temporary uplink transmission unit may be preconfigured in the system bandwidth, and the temporary uplink transmission unit is an uplink transmission resource allocated according to needs, that is, the resource of the temporary uplink transmission unit is not reserved in advance, but is allocated only when needed. The time domain position of the temporary uplink transmission unit may be determined by time domain offset information carried by a third DCI signaling sent by the base station and/or a third time domain position where the third DCI signaling is sent; the third DCI signaling is sent after the first DCI, is scrambled by using a cell common scrambling code and/or a terminal group scrambling code, and includes third prompt information for the identifier of the second type of temporary uplink transmission unit, that is, the third prompt information is used to prompt the specific type of the second type of temporary uplink transmission unit.

In this embodiment of the present invention, when the base station is configured with the 5 determining manners in advance, the base station indicates, in the indication information carried in the first DCI signaling, which of the 5 manners the determining manner of the uplink feedback time domain position is specifically. Specifically, a 3-bit indication information field may be used to indicate one of the 5 determination manners. Of course, in actual use, the base station may also be preconfigured with a greater number of determination manners or a lesser number of determination manners, a specific length of the indication information field may be selected according to needs, a correspondence between a field value of the indication information field and an uplink feedback time domain position determination manner is preset, and a value of the indication information field in the first DCI signaling is determined according to the correspondence and the determination manner adopted by the base station.

In this embodiment of the present invention, before scheduling the first downlink transmission resource, the base station may further configure, through Radio Resource Control (RRC) signaling, a corresponding relationship between the uplink feedback time domain position determining manner and the value of the indication information field for the terminal. Here, in the correspondence configured for different terminals, the uplink feedback time domain position determination manners corresponding to the same value of the indication information field may be the same or different, so as to implement flexible definition of the indication information field for different terminals.

Referring to fig. 4, a method for controlling transmission of downlink reception feedback information according to an embodiment of the present invention includes the following steps when applied to a terminal side:

step 41, a terminal receives a first downlink control information DCI signaling sent by a base station for scheduling a first downlink transmission resource, where the first DCI signaling carries indication information of an indication mode of an uplink feedback time domain position, where the uplink feedback time domain position is a time domain position for sending reception feedback information of the first downlink transmission resource, and the indication mode of the uplink feedback time domain position is one of at least one uplink feedback time domain position determination mode configured in advance;

and 42, the terminal determines the indication mode of the uplink feedback time domain position according to the indication information, and determines the uplink feedback time domain position according to the indication mode of the uplink feedback time domain position.

In the above steps, the terminal obtains the indication mode of the uplink feedback time domain position according to the first DCI signaling sent by the base station, and then determines the uplink feedback time domain position by using an uplink feedback time domain position determination mode indicated by the indication mode, thereby implementing flexible configuration of the uplink time domain feedback position and being applicable to a communication system adopting a flexible frame structure.

After step 42, the terminal may also send the reception feedback information of the first downlink transmission resource at the uplink feedback time domain position, and the base station receives the reception feedback information (ACK/NACK) of the first downlink transmission resource sent by the terminal at the uplink feedback time domain position, and performs HARQ processing based on the information.

Similarly, the indication information may be an indication information field, and before step 41, the terminal may further receive configuration information sent by the base station through an RRC signaling, where the configuration information includes a corresponding relationship between the uplink feedback time domain position determining manner configured for the terminal and a value of the indication information field, so that in step 42, according to the indication information, the indication manner of the uplink feedback time domain position is determined, specifically: and determining the uplink feedback time domain position determination mode corresponding to the value of the indication information field according to the corresponding relation between the preset field value and the uplink feedback time domain position determination mode. Of course, the above correspondence relationship may be previously arranged between the terminal side and the base station side.

Similarly, the at least one uplink feedback time domain position determination manner described in step 41 above may include one or more of the above 5 determination manners. Correspondingly, in step 42, determining the uplink feedback time domain position according to the indication manner of the uplink feedback time domain position specifically includes:

1) when it is determined that the indication mode of the uplink feedback time domain position is the first determination mode, the terminal may determine, based on the first time domain position of the first DCI signaling, the time domain position of the fixed uplink transmission unit that meets the first preset rule, to obtain the uplink feedback time domain position.

2) And when the indication mode of the uplink feedback time domain position is determined to be the second determination mode, the terminal receives the second DCI signaling sent by the base station, and determines the uplink feedback time domain position according to the time domain offset information carried by the second DCI signaling and/or the second time domain position of the second DCI signaling.

3) And when the indication mode of the uplink feedback time domain position is determined to be the third determination mode, determining the uplink feedback time domain position according to the time domain position of the first uplink scheduling resource which is within a preset time interval after the first DCI signaling and meets a second preset rule.

4) When the indication mode of the uplink feedback time domain position is determined to be the fourth determination mode, determining a first type of a standby uplink transmission unit according to first prompt information in a first DCI signaling, and determining the time domain position of the standby uplink transmission unit of the first type meeting a third preset rule based on the first time domain position of the first DCI signaling to obtain the uplink feedback time domain position.

Here, the first hint information is a value of the indication information field, and the indication information field has a plurality of values corresponding to the fourth determination manner, and each value corresponds to a type of the standby uplink transmission unit.

5) When the indication mode of the uplink feedback time domain position is determined to be the fifth determination mode, the terminal determines the second type of the temporary uplink transmission unit according to the second prompt information in the first DCI signaling; and the terminal receives the third DCI signaling sent by the base station, and determines the time domain position of the second type temporary uplink transmission unit meeting a fourth preset rule based on the time domain offset information carried by the third DCI signaling and/or a third time domain position for sending the third DCI signaling, so as to obtain the uplink feedback time domain position.

Here, the second hint information is a value of the indication information field, and the indication information field has a plurality of values, and each value corresponds to a type of the temporary uplink transmission unit.

Based on the transmission control method for downlink receiving feedback information, the embodiment of the invention also provides equipment for implementing the method.

Referring to fig. 5, a base station according to an embodiment of the present invention includes:

a feedback position determining unit 51, configured to determine an uplink feedback time domain position, where the uplink feedback time domain position is a time domain position for sending feedback information received from a first downlink transmission resource;

an indication mode determining unit 52, configured to determine an indication mode of an uplink feedback time domain position, where the indication mode of the uplink feedback time domain position is one of at least one uplink feedback time domain position determining mode configured in advance;

a first sending unit 53, configured to send, to the terminal, a first DCI signaling for scheduling the first downlink transmission resource, where the first DCI signaling carries indication information of an indication manner of the uplink feedback time domain position.

Here, the at least one uplink feedback time domain position determination manner includes one or more of the above 5 uplink feedback time domain position determination manners, which is not described again for saving details.

Here, the indication information is an indication information field, and a value of the indication information field is determined according to a correspondence between a preset field value and an uplink feedback time domain position determination manner.

Here, when the indication mode of the uplink feedback time domain position is the fourth determination mode, the first prompt information is a value of the indication information field, the indication information field has a plurality of values corresponding to the fourth determination mode, and each value corresponds to one type of the standby uplink transmission unit; and/or when the indication mode of the uplink feedback time domain position is the fifth determination mode, the second prompt information is a value of the indication information field, the indication information field has a plurality of values, and each value corresponds to one type of the temporary uplink transmission unit.

The base station of the embodiment of the present invention may further include the following units:

and the corresponding relation configuration unit is used for configuring the corresponding relation between the uplink feedback time domain position determination mode and the value of the indication information field for the terminal through RRC signaling before scheduling the first downlink transmission resource.

Here, the time interval between the fixed uplink transmission unit and the first downlink transmission resource, which is determined by the first preset rule, is greater than a first preset duration; the time interval between the first uplink scheduling resource and the first downlink transmission resource in a preset time interval after the first DCI signaling, which is determined by the second preset rule, is longer than a second preset time; the interval between the first type of standby uplink transmission unit and the first downlink transmission resource, which is determined by the third preset rule, is longer than a third preset duration; and the interval between the second type of temporary uplink transmission unit and the third time domain position determined by the fourth preset rule is longer than a fourth preset time length. At least one of the first preset time, the second preset time, the third preset time and the fourth preset time is configured in advance based on a preset standard, or the base station configures the terminal according to the device capability information reported by the terminal.

a second sending unit, configured to send, after sending the first DCI signaling, a second DCI signaling scrambled by using an RNTI of the terminal to the terminal when the indication mode of the uplink feedback time domain position is the second determination mode, where the second DCI signaling includes HARQ process information of the first downlink transmission resource. Here, the second DCI signaling also carries time domain offset information.

As described above, the temporary uplink transmission unit in the embodiment of the present invention is an uplink transmission resource allocated as needed, and the time domain position of the temporary uplink transmission unit is determined by the time domain offset information carried in the third DCI signaling and/or the third time domain position for sending the third DCI signaling. The base station may further include:

a third sending unit, configured to send, after sending the first DCI signaling, the third DCI signaling to the terminal when the indication mode of the uplink feedback time domain position is the fifth determination mode, where the third DCI signaling is scrambled by using a cell common scrambling code and/or a terminal group scrambling code and includes third indication information of a second type of temporary uplink transmission unit identifier.

A feedback information receiving unit, configured to receive, at the uplink feedback time domain position, feedback information of the first downlink transmission resource sent by the terminal after sending the first DCI signaling.

Here, the feedback position determination unit is specifically configured to: and determining the uplink feedback time domain position according to at least one parameter of the processing capacity of the terminal, the geographical position of the terminal in the cell, the requirement of the feedback time delay of the first downlink transmission resource and the time domain position of the available fixed/standby/temporary uplink transmission unit.

Referring to fig. 6, a terminal provided in an embodiment of the present invention includes:

a first receiving unit 61, configured to receive a first downlink control information DCI signaling that is sent by a base station and used to schedule a first downlink transmission resource, where the first DCI signaling carries indication information of an indication manner of an uplink feedback time domain position, where the uplink feedback time domain position is a time domain position where feedback information of the first downlink transmission resource is sent, and the indication manner of the uplink feedback time domain position is one of at least one uplink feedback time domain position determination manner that is configured in advance;

an indication mode determining unit 62, configured to determine an indication mode of the uplink feedback time domain position according to the indication information;

a feedback position determining unit 63, configured to determine the uplink feedback time domain position according to the indication manner of the uplink feedback time domain position.

Further, the terminal may further include:

and the feedback information sending unit is used for sending the receiving feedback information of the first downlink transmission resource at the uplink feedback time domain position.

Here, the feedback position determining unit 63 is specifically configured to:

when the indication mode of the uplink feedback time domain position is the first determination mode, the terminal determines the time domain position of the fixed uplink transmission unit meeting a first preset rule based on the first time domain position of the first DCI signaling, and obtains the uplink feedback time domain position;

when the indication mode of the uplink feedback time domain position is the second determination mode, the terminal receives the second DCI signaling sent by the base station, and determines the uplink feedback time domain position according to the time domain offset information carried by the second DCI signaling and/or the second time domain position sending the second DCI signaling;

when the indication mode of the uplink feedback time domain position is the third determination mode, determining the uplink feedback time domain position according to the time domain position of the first uplink scheduling resource which is within a preset time interval after the first DCI signaling and meets a second preset rule;

when the indication mode of the uplink feedback time domain position is the fourth determination mode, determining a first type of a standby uplink transmission unit according to first prompt information in a first DCI signaling, and determining a time domain position of the standby uplink transmission unit of the first type meeting a third preset rule based on the first time domain position of the first DCI signaling to obtain the uplink feedback time domain position;

when the indication mode of the uplink feedback time domain position is the fifth determination mode, the terminal determines the second type of the temporary uplink transmission unit according to the second prompt information in the first DCI signaling; and the terminal receives the third DCI signaling sent by the base station, and determines the time domain position of the second type temporary uplink transmission unit meeting a fourth preset rule based on the time domain offset information carried by the third DCI signaling and/or a third time domain position for sending the third DCI signaling, so as to obtain the uplink feedback time domain position.

Here, the indication mode determining unit 62 is specifically configured to, when the indication information is an indication information field, determine, according to a correspondence between a preset field value and an uplink feedback time domain position determination mode, the uplink feedback time domain position determination mode corresponding to the value of the indication information field.

The terminal may further include:

a configuration information receiving unit, configured to receive, before receiving the first DCI signaling, configuration information sent by a base station through an RRC signaling, where the configuration information includes a correspondence between the determination mode configured for the terminal and a value of the indication information field.

Finally, to help understanding of the above-mentioned contents of the embodiments of the present invention, the following will describe the above-mentioned 5 determination methods and their applications in more detail with reference to the accompanying drawings and examples.

The first determination method comprises the following steps: and determining the time domain position of a fixed uplink transmission unit meeting a first preset rule based on the first time domain position of the first DCI signaling to obtain the uplink feedback time domain position, wherein the period and the time domain offset of the fixed uplink transmission unit are configured in advance.

Here, as an implementation manner, the time interval between the fixed uplink transmission unit and the first downlink transmission resource, which is determined by the first preset rule, is greater than a first preset time length. The first preset duration may be configured in advance based on a preset standard, or configured for the terminal by the base station according to the device capability information reported by the terminal.

For example, in 5G NR, a number of periodically divided fixed uplink transmission units (referred to herein as fixed ul transmission units) may be defined. The fixed uplink transmission unit may be a complete uplink subframe or only a few uplink OFDM symbols. Fig. 7 provides a time domain schematic diagram of a fixed uplink transmission unit, in fig. 7, the fixed uplink transmission unit (fixed UL transmission unit) includes N uplink OFDM symbols (e.g., N is 2), and each fixed uplink transmission unit in fig. 7 may feed back ACK/NACK of 2 or 3 downlink subframes. The base station (eNB) configures a period and a subframe offset of a fixed uplink transmission unit (fixed UL transmission unit), and may inform the UE to which the fixed uplink transmission unit (fixed UL transmission unit) belongs through RRC signaling or a system message (e.g., SIB message). Fixed uplink transmission units (fixed UL transmission units) will appear periodically at time domain locations according to their periodicity, i.e. fixed uplink transmission units are always allocated and present regardless of whether there is data transmission.

In particular, neighboring base stations may coordinate fixed uplink transmission unit (fixed UL transmission unit) configurations with each other through an inter-station interface or other pre-configuration information to use the same periodicity and subframe offset configurations.

As an implementation manner, the terminal determines, based on the time domain position information of the first DCI signaling, the time domain position information of the ACK/NACK feedback information (referred to as a first DL ACK/NACK herein) of the first downlink transmission resource according to a first preset rule, where the first preset rule is:

the terminal is defined to default to feed back the reception feedback information of the first downlink transmission resource in a first fixed uplink transmission unit (fixed UL transmission unit) that satisfies a processing delay requirement (X1 ms) after the first downlink transmission resource. Wherein, the meeting of the processing delay requirement (X1 ms) means that the interval between the fixed uplink transmission unit (fixed uplink transmission unit) and the first downlink transmission resource is at least greater than or equal to X1 ms. Where X1 is a positive number greater than zero, and may be determined by factors such as terminal processing capability. For example, X1 ═ 4.

The X1 value is specified by standard protocols or the eNB configures an appropriate X1 value for each UE through RRC signaling.

One possible process flow is: a base station configures a terminal to report the processing capacity of the terminal; the base station determines an X1 value according to the processing capacity reported by the terminal; the base station configures the X1 value to the terminal through RRC signaling.

A possible potential problem with the first determination is: when the number N of OFDM symbols included in the fixed uplink transmission unit is small, the coverage of the cell may be limited. The reason for this is as follows:

it is known that at the base station, the demodulation capacity of the uplink signal of the terminal is determined by the SINR of the signal at the receiving antenna aperture of the base station, where P is_{TX @ terminal}Representing the total power, Pathloss, of the UE transmitted signal_{Terminal → base station}Representing the path loss, P, of the signal during its transmission from the terminal to the base station_{RX base station}Representing the total power of the signal received by the base station side antenna aperture, I_{RX base station}Representing the total interference power, N, experienced by the base station side_{@ base station}Representing the total noise power experienced at the base station side.

Obviously, when the noise and interference conditions are not changed, the larger the total power of the signals transmitted by the terminal is, the higher the SINR of the received signals at the base station side is, and the stronger the signal demodulation capability is.

In particular, for cell edge terminals, the path loss Pathloss thereof_{Terminal → base station}Is relatively large. Therefore, only when the total power of the signals transmitted by the terminal is large, the base station can obtain large received signal SINR, and can correctly demodulate the received signals. Therefore, the total power of the signals transmitted by the terminal determines the cell coverage of the base station. When the total power of the signals sent by the terminal is small, the base station can only serve a small coverage area, otherwise, the base station cannot correctly demodulate the uplink signals sent by the cell edge users.

Generally, the maximum instantaneous transmit power of a terminal is limited and much less than the maximum transmit power of a base station. For example, in the existing LTE system, the maximum transmit power of the terminal is 23dBm, and the maximum transmit power of the macro station is 46 dBm.

As shown in fig. 8a to 8b, without limiting the maximum transmit power of the terminal to tmax dbm per OFDM symbol, the maximum value of the cumulative transmit power of all REs added up depends only on the number N of OFDM symbols used, no matter how many RE resources the terminal uses to transmit DL ACK/NACK information. Obviously, the larger N, the larger the total power allowed by the terminal to transmit signals, and correspondingly, the larger the cell coverage of the base station. Assuming that the shaded REs in fig. 8a to 8b are filled with the DL ACK/NACK information, it can be seen that when the DL ACK/NACK information is sent by using 7 OFDM symbols in fig. 8a, the cumulative transmit power of all REs is 84 × Tmax/12 — 7 × Tmax; when DL ACK/NACK information is transmitted using 2 OFDM symbols in fig. 8b, the cumulative transmit power of all REs is 96 × Tmax/48 — 2 × Tmax. Obviously, the base station coverage of fig. 8b is smaller.

In the existing LTE system, a terminal feeds back DL ACK/NACK information in a PUCCH, which includes 7 OFDM symbols. In the 5G NR system shown in fig. 7, a fixed uplink transmission unit (fixed UL transmission unit) includes only N OFDM symbols, where N may be less than or equal to 7. Therefore, if the terminal is limited to feedback DL ACK/NACK information only in a fixed uplink transmission unit (fixed UL transmission unit) containing fewer OFDM symbols, the cell coverage of the 5G NR system may be severely limited compared to the existing LTE system.

In view of the above problems, the embodiments of the present invention allow other DL ACK/NACK information feedback manners.

The second determination mode is as follows: and determining the uplink feedback time domain position according to time domain offset information carried by a second DCI signaling which is sent to the terminal by the base station and carries the HARQ process information of the first downlink transmission resource and/or a second time domain position for sending the second DCI signaling.

After the first DCI signaling, the terminal continues to listen to another piece of DCI signaling (second DCI signaling) scrambled by the first terminal RNTI and containing the HARQ process number indication of the first downlink transmission resource, and determines time domain position information of ACK/NACK feedback information (referred to as first DL ACK/NACK herein) of the first downlink transmission resource based on time domain offset information carried by the second DCI signaling and/or time domain position information of the second DCI signaling. Here, the second DCI signaling may also carry redundancy version information.

For example, based on the time domain offset information carried in the second DCI signaling, the time domain offset information may be an offset of the time domain position of the first DL ACK/NACK relative to the time domain position of the first DCI signaling or the second DCI signaling, or may be indication information of a specific time domain position, so that the time domain position of the first DL ACK/NACK may be determined based on the time domain offset information carried in the second DCI signaling.

For another example, based on the time domain location information of the second DCI signaling, a time domain location satisfying a delay (e.g., X1 ms) required by the terminal processing capability is determined, so as to determine the time domain location of the first DL ACK/NACK.

For another example, based on the time domain offset information carried in the second DCI signaling and the time domain location information of the second DCI signaling, the time domain location when the offset relative to the time domain location of the second DCI signaling is the offset indicated by the time domain location information is determined, and the time domain location of the first DL ACK/NACK is obtained.

It can be seen that, in the present determination manner, the terminal may not send the first DL ACK/NACK feedback information according to the default timing relationship described in the first determination manner.

After the first DCI signaling, the first terminal continues to listen to other DCI signaling (second DCI signaling) scrambled by the first terminal RNTI. And when the DCI signaling is confirmed to contain the HARQ process number indication of the first DL scheduling resource, determining the time domain position information of the first DL ACK/NACK feedback information based on the indication information of the second DCI signaling and/or the time domain position information of the second DCI signaling.

Specifically, as an example, the second DCI signaling may be an uplink scheduling grant (UL grant) signaling, and include scheduling information of an uplink data transmission channel (PUSCH), that is, scheduling information of the second UL scheduling resource, for example, the time domain position of the second UL scheduling resource may be indicated by a time domain position of the second DCI signaling and time domain offset information carried in the second DCI signaling, and at this time, the first terminal determines to carry the first DL ACK/NACK feedback information in the second UL scheduling resource for feedback. Thus, in this example, the time domain position of the first DL ACK/NACK feedback information is the time domain position of the second UL scheduling resource.

Of course, the second DCI signaling may also indicate the time domain location information of the first DL ACK/NACK feedback information in other manners. For example, the time domain indication method of the first DL ACK/NACK feedback information described in the fourth determination manner or the fifth determination manner may be used.

It is noted that the second DCI signaling may be transmitted in the same subframe as the first DCI signaling or in a subframe after the first DCI signaling, but cannot be transmitted earlier than the first DCI signaling.

One potential application scenario for the second determination is: as described in the first determination manner, the first terminal defaults to feeding back the first DL ACK/NACK feedback information at a fixed uplink transmission unit (fixed UL transmission unit) including N uplink OFDM symbols, where N is a smaller value. At this time, the DL ACK/NACK feedback information transmitted by the cell edge user in the fixed uplink transmission unit (fixed ul transmission unit) may not be correctly received and demodulated by the base station. For this problem, the base station may configure, in a second determination manner, the first terminal located at the cell edge to carry the first dl ack/NACK feedback information in the second UL scheduling resource indicated by the second DCI signaling for feedback, where, compared to an uplink transmission unit (fixed UL transmission unit), the second UL scheduling resource uses more OFDM symbols than the fixed uplink transmission resource, e.g., uses one complete uplink subframe.

The third determination mode: and determining the uplink feedback time domain position according to the time domain position of the first uplink scheduling resource which is within a preset time interval after the first DCI signaling and meets a second preset rule, wherein the preset time interval is positioned after the first time domain position of the first DCI signaling.

Here, as an implementation manner, the time interval between the first uplink scheduling resource and the first downlink transmission resource in a preset time interval after the first DCI signaling, which is determined by the second preset rule, is greater than a second preset time duration; the second preset time period may be configured in advance based on a preset standard, or the base station may configure the terminal according to the device capability information reported by the terminal.

In the third determination method, the terminal transmits the first DL ACK/NACK feedback information in the first UL scheduling resource (first UL scheduling resource) in the specific time interval after the first DCI signaling.

In the third determination mode, the terminal does not send the first DLACK/NACK feedback information according to the default timing relationship in the first determination mode, as a specific example:

1) after receiving a first DCI signaling, a terminal first determines a time interval (a first time interval), where the first time interval includes at least one subframe;

wherein, the start time of the first time interval is the first DL scheduling resource + X2 ms, the end time of the first time interval is the first DL scheduling resource + Y2 ms, and Y2> X2.

Similarly, X2 is some positive number greater than zero, which may be determined by the terminal processing power. For example, X2 is 4 OFDM symbols long. The X2 value is specified by a standard protocol, or the base station configures an appropriate X2 value for each terminal through RRC signaling. Y2 is some positive number greater than zero. The Y2 value is specified by standard protocols or configured by RRC signaling.

2) The terminal further confirms whether UL scheduling resources exist in the first time interval, and if the UL scheduling resources exist, the terminal selects to carry the first DL ACK/NACK feedback information in the UL scheduling resources (first UL scheduling resources) which appear first in the first time interval for feedback.

Here, the first UL scheduling resource may be indicated by fourth DCI signaling transmitted by the base station. The fourth DCI signaling may be transmitted in the same subframe as the first DCI signaling, or may be transmitted in a subframe before or after the first DCI signaling.

In particular, if the terminal finds that there are a plurality of pieces of DL ACK/NACK feedback information that have not been fed back in the subframe where the first UL scheduling resource is located, the terminal may select to feed back all pieces of DL ACK/NACK feedback information that have not been fed back in the first UL scheduling resource at once.

The potential application scenario of the third determination method is similar to the second determination method, and is not described here again.

The fourth determination method: determining a first type of a standby uplink transmission unit according to first prompt information in a first DCI signaling, and determining a time domain position of the standby uplink transmission unit of the first type meeting a third preset rule based on the first time domain position of the first DCI signaling to obtain the uplink feedback time domain position, wherein at least one type of standby uplink transmission unit is pre-configured in a system bandwidth, each type of standby uplink transmission unit has different transmission cycles and/or delay offsets, and uplink transmission resources of the standby uplink transmission unit are allocated according to needs.

Here, as an implementation manner, the interval between the standby uplink transmission unit of the first type and the first downlink transmission resource, which is determined by the third preset rule, is greater than a third preset time duration; the third preset time period may be configured in advance based on a preset standard, or configured for the terminal by the base station according to the device capability information reported by the terminal.

In the fourth determination mode, the first DCI signaling includes additional first DL ACK/NACK feedback position indication information (first indication information); and the terminal determines the time domain position information of the standby uplink transmission unit for transmitting the first DLACK/NACK feedback information according to the first indication information and the first time domain position of the first DCI.

Fig. 9 shows a schematic diagram of a time domain location of a spare uplink transmission unit. As shown in fig. 9, configurations of a fixed uplink transmission unit and two types (type a and type b) of standby uplink transmission units are predefined, where configuration information of the configurations may include: time domain length of transmission resources, transmission period, subframe offset and other parameters.

The base station notifies the terminal to which the configuration information such as the length, transmission period, subframe offset, and the like of the fixed uplink transmission unit and the at least one type of standby uplink transmission unit to the terminal through RRC signaling or system message (e.g., SIB message).

In particular, the base station may always reserve uplink transmission resources for the fixed uplink transmission units, and may not always reserve uplink transmission resources for the spare uplink transmission units. In contrast, the base station will only reserve uplink transmission resources for the standby uplink transmission units as needed.

Fig. 10 a-10 b further illustrate two application scenarios for uplink receive feedback using a spare uplink transmission unit.

In the first application scenario shown in fig. 10a, it is assumed that the periodic interval of the fixed uplink transmission unit is large. If the feedback manner according to the first determination manner, the DL ACK/NACK feedback information of the first downlink subframe should be fed back on the first fixed burst. However, the base station is sensitive to the feedback delay of the first downlink subframe, and it is desirable to obtain the DL ACK/NACK feedback information corresponding to the first downlink subframe more quickly. For this purpose,

firstly, the base station selects an available spare uplink transmission unit burst, and the selection rule of the spare uplink transmission unit burst is as follows: the available spare uplink transmission unit burst follows the first DL scheduling resource (first downlink subframe) and has a time interval from the first DL scheduling resource greater than or equal to X1 ms. Where X1 is a positive number greater than zero and is determined by the terminal processing capability. For example, X1 is 4 subframe lengths. The X1 value is specified by a standard protocol, or the base station configures an appropriate X1 value for each terminal through RRC signaling. In fig. 10a, a spare uplink transmission unit of type b (first spare burst) after the selection of the first downlink subframe transmits feedback information of the first downlink subframe. The base station will reserve uplink transmission resources for the first backup burst.

Secondly, the base station instructs the terminal to feed back the ACK/NACK feedback information of the first downlink subframe in the standby uplink transmission unit of type b through the field of the first indication information in the first DCI signaling.

Finally, the base station attempts to receive the DL ACK/NACK feedback information of the first downlink subframe in the determined first standby burst.

Specifically, after the first terminal receives the first DCI signaling, the first terminal selects the first occurring type b of standby uplink transmission unit burst that satisfies the processing delay requirement (X1 ms) after the first DL scheduling resource to feed back the DL ACK/NACK feedback information of the first downlink subframe.

In the second application scenario shown in fig. 10b, it is assumed that there are multiple downlink subframes (e.g. the second downlink subframe) before the third downlink subframe to confirm that the DL ACK/NACK information is fed back on the second fixed burst (fixed uplink transport unit), and the DL ACK/NACK feedback information of the third downlink subframe should be fed back on the second fixed burst according to the default rule of the first determination manner. However, when the base station schedules the third downlink subframe, it is found that if the feedback continues according to the aforementioned default rule, the UL frequency domain resource corresponding to the feedback information of the third downlink subframe may collide with the UL frequency domain resource that has been allocated previously (for example, the UL frequency domain resource has been allocated to feedback DL ACK/NACK information corresponding to the second downlink subframe), and then the base station additionally selects an available standby uplink transmission unit burst to carry the collided DL ACK/NACK feedback information. In the second application scenario, the specific processing flows of the base station and the terminal are the same as those in the first application scenario, and are not described herein again.

It should be noted that, in an application scenario described in the fourth determination manner, the standby uplink transmission unit may be a complete uplink subframe or only a few uplink OFDM symbols. And, the standby uplink transmission unit and the fixed uplink transmission unit may use different subframe configurations.

The fifth determination mode: and determining the time domain position of the temporary uplink transmission unit of the second type meeting a fourth preset rule based on time domain offset information carried by a third DCI signaling and/or a third time domain position for sending the third DCI signaling, so as to obtain the uplink feedback time domain position.

Here, as an implementation manner, the interval between the second type of temporary uplink transmission unit and the third time domain position, which is determined by the fourth preset rule, is greater than a fourth preset duration. The fourth preset time period may be configured in advance based on a preset standard, or configured for the terminal by the base station according to the device capability information reported by the terminal.

In the fifth determination mode, the first DCI signaling includes extra DL ACK/NACK feedback position indication information (second indication information); the base station determines the type of the temporary uplink transmission unit corresponding to the second indication information, scrambles DCI signaling (third DCI signaling) by the public scrambling code and/or the terminal group scrambling code of the cell, and informs at least one terminal of the cell of the DL ACK/NACK feedback position corresponding to the second indication information; the first terminal continues to monitor the third DCI signaling, and determines the time domain position information of the first DL ACK/NACK feedback information according to the third DCI signaling;

the fifth determination method and the fourth determination method have the same application scenario, and the processing method is similar, and the difference between the fifth determination method and the fourth determination method is that:

in the fourth determination method, a time domain transmission rule of the standby uplink transmission unit burst is defined in advance through static or semi-static configuration. And the base station activates the special type of standby uplink transmission unit burst through the first DCI signaling.

In the fifth determination method, the time domain transmission rule of the temporary uplink transmission unit burst is not defined in advance. And the base station dynamically indicates the time domain position of the burst of the temporary uplink transmission unit by sending a third DCI signaling.

Fig. 11 shows an example of uplink reception feedback using the temporary uplink transmission unit. As shown in fig. 11, if the default rule of the first determination method is followed, the DL ACK/NACK feedback information of the first downlink subframe and the second downlink subframe should be fed back on the first fixed burst.

However, for some reason, the base station may wish to transmit the DL ACK/NACK feedback information in other uplink transmission units. At this time, the specific processing flow for the first downlink subframe is as follows:

first, in the first downlink subframe, the base station confirms that a temporary uplink transmission unit burst (first temporary burst) is to be configured for the first downlink subframe. Note that at the time of the first downlink subframe, the base station may already have the ability to identify the time-frequency resource location of the first temporary burst, or may not have the ability to identify the time-frequency resource location of the first temporary burst for a while.

Secondly, the base station instructs the terminal to feed back the first DL ACK/NACK feedback information in a certain specific type of temporary uplink transmission unit through a second indication information field in the first DCI signaling. Note that the terminal does not know which uplink subframe the first-type temporary uplink transmission unit corresponds to at this time.

Then, once the base station has the capability to identify the time-frequency resource location of the first temporary burst, the base station will reserve uplink transmission resources for the first temporary burst. Note that, the time when the base station confirms the time-frequency resource location configuration of the first temporary burst may be just the first downlink subframe, or may be after the first downlink subframe.

And the base station further sends a third DCI signaling to at least inform the first terminal of feeding back the first DLACK/NACK feedback information on the first temporary burst.

Here, in order to reduce DCI signaling overhead, the third DCI signaling may be scrambled by the cell common scrambling code and/or the terminal group scrambling code, so that all terminals served by the cell can receive the third DCI signaling and understand the information carried therein. Thus, a plurality of terminals can be notified by using one DCI signaling, so that the plurality of terminals can know the time domain position of the temporary uplink transmission unit allocated by the terminal.

There are various implementation manners of the third DCI signaling, including:

the first method is as follows: the third DCI signaling includes a temporary uplink transmission unit type indication field. For example, using a 1-bit temporary uplink transmission unit type indication field n, when n is equal to 0, the temporary uplink transmission unit indicating type a is included in the xth 3 subframe after the third DCI signaling; and when n is 1, the temporary uplink transmission unit indicating type b is included in the X3 th subframe after the third DCI signaling, where X3 is a positive integer.

The second method comprises the following steps: the third DCI signaling includes a temporary uplink transmission unit type indication field n and a subframe offset field X4, which are used to indicate that the temporary uplink transmission unit of the corresponding type is included in the X4 subframe after the third DCI signaling, where X4 is a positive integer.

In the above two schemes, the third DCI signaling may be sent independently, or the temporary uplink transmission unit type indication field and/or the subframe offset field defined above may be added to the DCI shared by other cells to be sent.

Finally, the base station attempts to receive the first DL ACK/NACK feedback information in the determined first temporary burst.

For the second downlink subframe, the base station may perform similar processing, which is not described herein again.

Specifically, after the first terminal receives the first DCI signaling, the first terminal continues to wait for a third DCI signaling capable of indicating a time-frequency resource location of the temporary uplink transmission unit of type a, and determines time domain location information of the first DL ACK/NACK feedback information according to the corresponding indication.

Note that, in an application scenario described in the fifth determination manner, the temporary uplink transmission unit may be a complete uplink subframe or only a few uplink OFDM symbols, and the temporary uplink transmission unit and the fixed uplink transmission unit may use different subframe configurations.

The above respectively illustrates examples of various determination manners that can be adopted by the embodiments of the present invention.

As described above, the first DCI signaling sent by the base station to the terminal carries the indication information of the indication mode of the uplink feedback time domain position. The indication information may be an indication information field, and a value of the indication information field is determined according to a correspondence between a preset field value and an uplink feedback time domain position determination manner. For example, when the indication mode of the uplink feedback time domain position is the fourth determination mode, the first prompt information is a value of the indication information field, the indication information field has a plurality of values corresponding to the fourth determination mode, and each value corresponds to one type of the standby uplink transmission unit. For another example, when the indication mode of the uplink feedback time domain position is the fifth determination mode, the second prompt information is a value of the indication information field, the indication information field has a plurality of values, and each value corresponds to one type of the temporary uplink transmission unit.

Specifically, the corresponding relationship between the information bit combination in the indication information field and the five determination modes is specified by a standard protocol, or the corresponding relationship is configured by the base station through RRC signaling. The following is an example of a specific implementation of the above-mentioned indication information field.

For example, the correspondence between the information bit combination in the indication information field and the time domain position information indication scheme of the first DL ACK/NACK feedback information is predetermined. For example:

the first candidate method is as follows:

it is assumed that the indication information field contains 2 bits,

1) when the information bit combination is 00, a first determination mode is adopted;

2) when the information bit combination is 01, a second determination mode is adopted;

3) when the information bit combination is 10, indicating that a fourth determination mode is adopted and indicating that the standby uplink transmission unit of the type a is used;

4) when the information bit combination is 11, indicating that a fourth determination mode is adopted and indicating that the standby uplink transmission unit of the type b is used;

alternative mode two:

similar to the first alternative, but when the information bit combination is 01, the third determination is defined.

And a third candidate method:

similar to the alternative method one, however,

when the information bit combination is 10, indicating that a fifth determination mode is adopted and indicating to use the temporary uplink transmission unit of the type a;

and when the information bit combination is 11, indicating that the fifth determination mode is adopted and indicating that the temporary uplink transmission unit of the type b is used.

Other alternatives:

the indication information field may contain more information bits, and may suggest other mapping relationships of the information bit combination and the time domain position information indication manner of the first dl ack/NACK feedback information.

Note that the base station can also configure which mapping method the terminal uses through RRC signaling. I.e. different terminals may choose different mapping methods, so that different terminals may have different understandings for the same combination of information bits in the indication information field.

In summary, the embodiment of the present invention can dynamically adjust the time domain position of the DL ACK/NACK feedback information by the method and the apparatus, so that the application requirement of the 5G NR flexible frame structure can be effectively adapted.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A transmission control method for downlink receiving feedback information is characterized by comprising the following steps:

the base station sends a first Downlink Control Information (DCI) signaling for scheduling the first downlink transmission resource to the terminal, wherein the first DCI signaling carries indication information of an indication mode of the uplink feedback time domain position;

wherein the at least one uplink feedback time domain position determination mode comprises one or more of the following uplink feedback time domain position determination modes:

a second determining mode, where the second determining mode is to determine the uplink feedback time domain position according to time domain offset information carried by a second DCI signaling carrying HARQ process information of a first downlink transmission resource and/or a second time domain position for sending the second DCI signaling, where the second DCI signaling is sent to the terminal by a base station;

a third determination mode, wherein the third determination mode is as follows: determining the uplink feedback time domain position according to the time domain position of the first uplink scheduling resource which is in a preset time interval after the first DCI signaling and meets a second preset rule, wherein the preset time interval is positioned after the first time domain position of the first DCI signaling;

a fourth determination manner, wherein the fourth determination manner is: determining a first type of a standby uplink transmission unit according to first prompt information in a first DCI signaling, and determining a time domain position of the standby uplink transmission unit of the first type meeting a third preset rule based on the first time domain position of the first DCI signaling to obtain an uplink feedback time domain position, wherein at least one type of standby uplink transmission unit is pre-configured in a system bandwidth, each type of standby uplink transmission unit has different transmission cycles and/or delay offsets, and uplink transmission resources of the standby uplink transmission unit are allocated according to needs;

a fifth determination manner, which is: and determining the time domain position of the temporary uplink transmission unit of the second type meeting a fourth preset rule based on time domain offset information carried by a third DCI signaling and/or a third time domain position for sending the third DCI signaling, so as to obtain the uplink feedback time domain position.

2. The method of claim 1,

the indication information is an indication information field, and the value of the indication information field is determined according to the corresponding relation between the preset field value and the uplink feedback time domain position determination mode.

3. The method of claim 2,

when the indication mode of the uplink feedback time domain position is the fourth determination mode, the first prompt information is a value of the indication information field, the indication information field has a plurality of values corresponding to the fourth determination mode, and each value corresponds to one type of the standby uplink transmission unit; and/or the presence of a gas in the gas,

and when the indication mode of the uplink feedback time domain position is the fifth determination mode, the second prompt information is a value of the indication information field, the indication information field has a plurality of values, and each value corresponds to one type of the temporary uplink transmission unit.

4. The method of claim 2,

before the base station schedules the first downlink transmission resource, the method further comprises:

and the base station configures the corresponding relation between the uplink feedback time domain position determining mode and the value of the indication information field for the terminal through RRC signaling.

5. The method of claim 1,

the time interval between the first uplink scheduling resource and the first downlink transmission resource in a preset time interval after the first DCI signaling, which is determined by the second preset rule, is longer than a second preset time;

the interval between the first type of standby uplink transmission unit and the first downlink transmission resource, which is determined by the third preset rule, is longer than a third preset duration;

and the interval between the second type of temporary uplink transmission unit and the third time domain position determined by the fourth preset rule is longer than a fourth preset time length.

6. The method of claim 5,

at least one of the second preset time length, the third preset time length and the fourth preset time length is configured in advance based on a preset standard, or the base station configures the terminal according to the equipment capability information reported by the terminal.

7. The method of claim 1,

when the indication mode of the uplink feedback time domain position is the second determination mode, after the first DCI signaling is sent, the method further includes:

and the base station sends a second DCI signaling scrambled by the RNTI of the terminal to the terminal, wherein the second DCI signaling contains HARQ process information of the first downlink transmission resource.

8. The method of claim 7, wherein the second DCI signaling further carries time domain offset information.

9. The method of claim 1,

the temporary uplink transmission unit is an uplink transmission resource distributed according to needs, and the time domain position of the temporary uplink transmission unit is determined by time domain offset information carried by a third DCI signaling and/or a third time domain position for sending the third DCI signaling;

when the indication mode of the uplink feedback time domain position is the fifth determination mode, after the first DCI signaling is sent, the method further includes:

and the base station sends the third DCI signaling to the terminal, wherein the third DCI signaling is scrambled by using a cell public scrambling code and/or a terminal group scrambling code and contains third prompt information of the second type of temporary uplink transmission unit identifier.

10. The method of claim 1,

the step of the base station determining the uplink feedback time domain position comprises the following steps:

and the base station determines the uplink feedback time domain position according to at least one parameter of the processing capacity of the terminal, the geographical position of the terminal in the cell, the requirement of the feedback time delay of the first downlink transmission resource and the time domain position of the available fixed/standby/temporary uplink transmission unit.

11. The method of claim 1, wherein after transmitting the first DCI signaling, the method further comprises:

and the base station receives the feedback information of the first downlink transmission resource sent by the terminal at the uplink feedback time domain position.

12. A transmission control method for downlink receiving feedback information is characterized by comprising the following steps:

a terminal receives a first Downlink Control Information (DCI) signaling which is sent by a base station and used for scheduling a first downlink transmission resource, wherein the first DCI signaling carries indication information of an indication mode of an uplink feedback time domain position, the uplink feedback time domain position is a time domain position for sending the received feedback information of the first downlink transmission resource, and the indication mode of the uplink feedback time domain position is one of at least one uplink feedback time domain position determination mode which is configured in advance;

the terminal determines an indication mode of the uplink feedback time domain position according to the indication information, and determines the uplink feedback time domain position according to the indication mode of the uplink feedback time domain position;

wherein the at least one uplink feedback time domain position determination mode comprises one or more of the following determination modes:

13. The method of claim 12, wherein after the step of determining the uplink feedback time domain location, the method further comprises:

and the terminal sends the receiving feedback information of the first downlink transmission resource at the uplink feedback time domain position.

14. The method according to claim 12, wherein the step of determining the uplink feedback time domain position according to the indication manner of the uplink feedback time domain position comprises:

15. The method of claim 12,

the step of determining the indication mode of the uplink feedback time domain position according to the indication information comprises the following steps:

and determining the uplink feedback time domain position determination mode corresponding to the value of the indication information field according to the corresponding relation between the preset field value and the uplink feedback time domain position determination mode.

16. The method of claim 15,

17. The method of claim 15,

prior to receiving the first DCI signaling, the method further comprises:

and the terminal receives configuration information sent by the base station through RRC signaling, wherein the configuration information comprises the corresponding relation between the uplink feedback time domain position determining mode configured for the terminal and the value of the indication information field.

18. The method of claim 12,

19. The method of claim 18,

20. A base station, comprising:

a first sending unit, configured to send, to a terminal, a first downlink control information DCI signaling for scheduling the first downlink transmission resource, where the first DCI signaling carries indication information of an indication mode of the uplink feedback time domain position;

21. The base station of claim 20,

22. The base station of claim 21,

23. The base station of claim 21, further comprising:

24. The base station of claim 20,

25. The base station of claim 24,

26. The base station of claim 20, further comprising:

a second sending unit, configured to send, after sending the first DCI signaling, a second DCI signaling scrambled by using an RNTI of the terminal to the terminal when the indication mode of the uplink feedback time domain position is the second determination mode, where the second DCI signaling includes HARQ process information of the first downlink transmission resource.

27. The base station of claim 26, wherein the second DCI signaling further carries time domain offset information.

28. The base station of claim 20,

the base station further comprises:

29. The base station of claim 20,

the feedback position determining unit is specifically configured to: and determining the uplink feedback time domain position according to at least one parameter of the processing capacity of the terminal, the geographical position of the terminal in the cell, the requirement of the feedback time delay of the first downlink transmission resource and the time domain position of the available fixed/standby/temporary uplink transmission unit.

30. The base station of claim 20, further comprising:

31. A terminal, comprising:

a feedback position determining unit, configured to determine the uplink feedback time domain position according to an indication manner of the uplink feedback time domain position;

32. The terminal of claim 31, further comprising:

33. The terminal of claim 31, wherein the feedback position determining unit is specifically configured to:

34. The terminal of claim 31,

the indication mode determining unit is specifically configured to determine, when the indication information is an indication information field, an uplink feedback time domain position determining mode corresponding to a value of the indication information field according to a correspondence between a preset field value and the uplink feedback time domain position determining mode.

35. The terminal of claim 34,

36. The terminal of claim 34, further comprising:

37. The terminal of claim 31,

38. The terminal of claim 37,