CN107872306B

CN107872306B - Downlink transmission method and related equipment

Info

Publication number: CN107872306B
Application number: CN201611249798.9A
Authority: CN
Inventors: 高雪娟; 潘学明; 郑方政
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT; Datang Mobile Communications Equipment Co Ltd
Priority date: 2016-09-23
Filing date: 2016-12-29
Publication date: 2021-05-25
Anticipated expiration: 2036-12-29
Also published as: CN107872306A

Abstract

The invention discloses a downlink transmission method and related equipment, which are used for realizing dynamic adjustment of uplink and downlink resources in a future communication system. The method comprises the following steps: a terminal determines a downlink detection position in a first time unit and detects a first downlink signal at the downlink detection position in the first time unit; and the terminal determines a downlink region corresponding to the downlink detection position and/or an uplink region corresponding to the downlink detection position according to the first downlink signal.

Description

Downlink transmission method and related equipment

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a downlink transmission method and a related device.

Background

Frame structure in Long Term Evolution (LTE) system

The following frame structure is defined for Time Division Duplex (TDD) in the existing LTE system:

in the LTE TDD system, a Frame Structure Type 2 (FS 2 for short) is used, and fig. 1 shows a structural diagram of FS 2. Uplink and downlink transmissions use different subframes or different time slots on the same frequency. Each 10ms long radio frame in FS2 consists of two 5ms long half-frames, each containing 5 1ms long subframes. The subframes in FS2 are divided into three categories, which are: the subframe comprises a Downlink subframe, an Uplink subframe and special subframes, wherein each special subframe comprises a Downlink transmission Time Slot (DwPTS), a Guard Period (GP) and an Uplink transmission Time Slot (UpPTS). Each half frame comprises at least 1 downlink subframe, at least 1 uplink subframe and at most 1 special subframe. According to different uplink and downlink switching point periods and uplink and downlink allocation proportions, 7 TDD uplink and downlink configurations shown in table 1 and 10 special subframe structures shown in table 2 are defined.

Table 1: uplink and downlink configuration

TABLE 2 Special subframe configuration (DwPTS/GP/UpPTS length)

Wherein Ts is a time interval used by the system, and X is a predefined or configured value.

In an LTE system, uplink and downlink resource partitioning is implemented by defining a TDD frame structure, so that an LTE cell can only configure one TDD frame structure, and only support fixed uplink and downlink resource partitioning, and is notified by system information broadcast in the cell, so that it is fixed and shared by all terminals in the cell.

In addition, in the LTE system, a GP is required between the uplink resource and the downlink resource to avoid interference between uplink and downlink in the same cell and to implement downlink-to-uplink handover. The GP exists only in the special subframe in each TDD uplink and downlink configuration, the length of the GP depends on the special subframe configuration, and one special subframe configuration corresponds to the length division of the downlink resource (DwPTS portion), uplink resource (UpPTS portion) and the GP portion in the special subframe. The special subframe configuration is also notified in a cell by the system information broadcast in the cell and is therefore fixed and not changed, and is shared by all terminals in the cell.

With the development of mobile communication service demand, organizations such as ITU (International telecommunications Union) and 3GPP (3rd Generation partnership project) have started to research new wireless communication systems (e.g., 5G systems). The new wireless Communication system may support coexistence of multiple service types, for example, eMBB (Enhanced Mobile Broadband, Enhanced Mobile internet) service, URLLC (Ultra Reliable and Low Latency) service, mtc (Massive Machine Type Communication, internet of things) service, and the like, and the traffic volume of the same service may also change. When uplink and downlink services share resources in the same frequency band in a TDM (Time Division Multiplexing) manner, in order to support different service types and traffic demands, flexible and variable resource partitioning needs to be supported.

It can be seen that, in a future communication system, uplink resources and downlink resources may be divided more dynamically, and GP between the uplink resources and the downlink resources also needs to be changed flexibly to meet different requirements. In the LTE system, uplink and downlink resource division and GP configuration are both dedicated configurations for a cell, and terminals in the cell are all configured identically, so that dynamic adjustment cannot be made for service types, traffic volumes, and interference conditions of flexible terminal changes in a future communication system.

Disclosure of Invention

The embodiment of the invention provides a downlink transmission method and related equipment, which are used for realizing dynamic adjustment of uplink and downlink resources in a future communication system.

The embodiment of the invention provides the following specific technical scheme:

in a first aspect, an embodiment of the present invention provides a downlink transmission method, including:

a terminal determines a downlink detection position in a first time unit and detects a first downlink signal at the downlink detection position in the first time unit;

and the terminal determines a downlink region corresponding to the downlink detection position and/or an uplink region corresponding to the downlink detection position according to the first downlink signal.

In a possible embodiment, the determining, by the terminal, the downlink detection position in the first time unit specifically includes:

the terminal determines a downlink detection position in the first time unit according to the high-level signaling; or,

the terminal determines a downlink detection position in the first time unit according to a predetermined agreement with a base station; or,

the terminal detects a second downlink signal at a specific position in each or a specific first time unit, and determines downlink detection positions in the first time unit in which the second downlink signal is detected or the N1 first time units starting from the first time unit in which the second downlink signal is detected or the N2 first time units after the first time unit in which the second downlink signal is detected according to the second downlink signal, wherein N1 and N2 are integers greater than or equal to 1.

In a possible embodiment, if the first downlink signal is used to notify the size of the downlink region in the first time unit, the second downlink signal is also used to notify the position and/or size of the uplink region in the first time unit;

if the first downlink signal is used to notify the size of the uplink region in the first time unit, the second downlink signal is also used to notify the position and/or size of the downlink region in the first time unit.

In a possible implementation manner, the downlink detection position is a position of a specific second time unit in the first time unit, where the second time unit is smaller than the first time unit.

In a possible implementation, the second time unit is a symbols, or B mini-slots, or C slots, or D subframes; the mini-slots are minimum scheduling units, one mini-slot includes E symbols, one slot includes one or more mini-slots, one subframe includes one or more slots, and A, B, C, D, E is a preconfigured or predefined value greater than or equal to 1.

In a possible embodiment, the determining, by the terminal, a downlink region corresponding to the downlink detection position according to the first downlink signal includes:

the terminal acquires a stop position of the downlink region carried in the first downlink signal, and takes the downlink detection position or a downlink detection position in N3 first time units after the first time unit or a downlink start position in N3 first time units after the first time unit as a start position of the downlink region;

or,

the terminal acquires a start position of a guard interval GP carried in the first downlink signal, and determines the start position of the GP as a stop position of the downlink region by using the downlink detection position or a downlink detection position in N3 first time units after the first time unit or a downlink start position in N3 first time units after the first time unit as the start position of the downlink region.

In a possible embodiment, the determining, by the terminal, an uplink region corresponding to the downlink detection position according to the first downlink signal includes:

the terminal acquires the initial position of the uplink region carried in the first downlink signal, and determines the position and/or size of the uplink region according to the initial position of the uplink region and a preset stop position of the uplink region;

or,

the terminal acquires the initial position of the uplink region and the ending position of the uplink region carried in the first downlink signal, and determines the position and/or size of the uplink region according to the initial position of the uplink region and the ending position of the uplink region;

or,

the terminal acquires the initial position of the uplink region and the length of the uplink region carried in the first downlink signal, and determines the position and/or size of the uplink region according to the initial position of the uplink region and the length of the uplink region;

or,

and the terminal determines the cut-off position of a guard interval GP zone according to the first downlink signal, takes the cut-off position of the GP zone as the initial position of the uplink zone, and determines the position and/or size of the uplink zone according to the initial position of the uplink zone and the preset cut-off position of the uplink zone.

In a possible implementation manner, the size of the downlink region is a time length of the downlink region, or a time length of the downlink region that needs to be monitored; or,

the downlink region corresponding to the downlink detection position is a downlink region from the downlink detection position, and/or a downlink detection position in N3 first time units after the first time unit or a downlink starting position in N3 first time units after the first time unit; or,

the uplink region corresponding to the downlink detection position is an uplink region scheduled by a downlink control channel using an uplink DCI format detected in the downlink region corresponding to the downlink detection position at the downlink detection position, or the uplink region corresponding to the downlink detection position is an uplink region for transmitting ACK/NACK feedback information of downlink transmission in the downlink region corresponding to the downlink detection position.

In a possible embodiment, the downlink detection position exists in each first time unit or only in a specific first time unit;

if the downlink detection position exists only in a specific first time unit, for the first time unit without the downlink detection position, or the first time unit with the downlink detection position but without the first downlink signal detected in the downlink detection position, referring to the division of the downlink region and/or the uplink region in the first time unit with the downlink detection position and the first downlink signal detected in front of the first time unit.

In a possible implementation manner, the first time unit includes N second time units, or the first time unit is one or more slot slots, or one or more subframes, or one or more radio frames.

In a possible embodiment, the first downlink signal is a downlink control channel using a downlink DCI format, or a downlink control channel using an uplink DCI format.

In a second aspect, an embodiment of the present invention provides a downlink transmission method, including:

a base station determines a downlink detection position in a first time unit;

and the base station sends a first downlink signal at a downlink detection position in the first time unit, and is used for informing a terminal to determine a downlink region corresponding to the downlink detection position and/or an uplink region corresponding to the downlink region according to the first downlink signal.

In a possible embodiment, the determining, by the base station, the downlink detection position in the first time unit specifically includes:

the base station determines a downlink detection position in a first time unit and informs the downlink detection position in the first time unit to a terminal through a high-level signaling; or,

the base station determines a downlink detection position in the first time unit according to a predetermined agreement with a terminal; or,

the base station sends a second downlink signal at a specific position in each or a specific first time unit, for notifying the terminal of the downlink detection position in the first time unit in which the second downlink signal is detected or the N1 first time units starting from the first time unit in which the second downlink signal is detected or the N2 first time units after the first time unit in which the second downlink signal is detected, wherein N1 and N2 are integers greater than or equal to 1.

In a possible embodiment, after the base station determines the downlink detection position in the first time unit, before the downlink detection position in the first time unit sends the first downlink signal, the method further includes:

the base station carries out neighbor cell interference measurement before the downlink detection position, determines neighbor cell interference strength and a neighbor cell interference area, and determines the size of a first protection interval GP area according to the neighbor cell interference strength and the neighbor cell interference area; and/or

And the base station determines a TA (time advance) value of a terminal which carries out uplink transmission in an uplink region after the downlink detection position, and determines the size of a GP (guard period) region according to the maximum TA value of the terminal.

In a possible embodiment, the method further comprises:

and the base station adjusts a downlink region corresponding to the downlink detection position and/or an uplink region corresponding to the downlink detection position according to the size of the first GP region and/or the size of the second GP region.

In a possible embodiment, the method further comprises:

and the base station informs the size of the first GP zone to a neighbor base station.

In a possible implementation manner, the first downlink signal carries a size of a downlink region corresponding to the downlink detection position, and/or carries a size of an uplink region corresponding to the downlink detection position, and/or carries a size of a GP region, where the size of the GP region is the size of the first GP region and/or the second GP region or is the size of the GP region determined according to the size of the first GP region and/or the second GP region.

In a possible embodiment, the first downlink signal carries an end position of the downlink region, and the downlink detection position or a downlink detection position in N3 first time units after the first time unit or a downlink start position in N3 first time units after the first time unit is taken as a start position of the downlink region;

or,

the first downlink signal carries a start position of a guard interval (GP) region, the downlink detection position or a downlink detection position in N3 first time units after the first time unit or a downlink start position in N3 first time units after the first time unit is used as the start position of the downlink region, and the start position of the GP region is determined as an end position of the downlink region;

or,

the first downlink signal carries the initial position of the uplink region, and the position and/or the size of the uplink region are/is determined according to the initial position of the uplink region and a preset stop position of the uplink region;

or,

the first downlink signal carries the starting position of the uplink region and the ending position of the uplink region, and the position and/or the size of the uplink region are determined according to the starting position of the uplink region and the ending position of the uplink region;

or,

the first downlink signal carries the starting position of the uplink region and the length of the uplink region, and the position and/or the size of the uplink region are/is determined according to the starting position of the uplink region and the length of the uplink region;

or,

and the first downlink signal carries a cutoff position of a guard interval GP zone, the cutoff position of the GP zone is taken as a starting position of the uplink zone, and the position and/or the size of the uplink zone are/is determined according to the starting position of the uplink zone and a preset cutoff position of the uplink zone.

the uplink region corresponding to the downlink detection position is an uplink region scheduled by a downlink control channel using an uplink DCI format detected at the downlink detection position or in the uplink region corresponding to the downlink detection position, or the uplink region corresponding to the downlink detection position is an uplink region for transmitting ACK/NACK feedback information of downlink transmission in the downlink region corresponding to the downlink detection position.

In a third aspect, an embodiment of the present invention provides a terminal, including:

the first processing module is used for determining a downlink detection position in a first time unit and detecting a first downlink signal at the downlink detection position in the first time unit;

and the second processing module is used for determining a downlink region corresponding to the downlink detection position and/or an uplink region corresponding to the downlink detection position according to the first downlink signal.

In a possible implementation manner, the first processing module is specifically configured to:

determining a downlink detection position in the first time unit according to a high-level signaling; or,

determining a downlink detection position in the first time unit according to a predetermined agreement with a base station; or,

detecting a second downlink signal at a specific position in each or a specific first time unit, and determining downlink detection positions in the first time unit in which the second downlink signal is detected or the N1 first time units beginning at the first time unit in which the second downlink signal is detected or the N2 first time units after the first time unit in which the second downlink signal is detected according to the second downlink signal, wherein N1 and N2 are integers greater than or equal to 1.

In a possible implementation manner, the second processing module is specifically configured to:

acquiring a cut-off position of the downlink region carried in the first downlink signal, and taking the downlink detection position or a downlink detection position in N3 first time units after the first time unit or a downlink start position in N3 first time units after the first time unit as a start position of the downlink region;

or,

acquiring a start position of a guard interval GP carried in the first downlink signal, taking the downlink detection position or a downlink detection position in N3 first time units after the first time unit or a downlink start position in N3 first time units after the first time unit as a start position of the downlink region, and determining the start position of the GP as an end position of the downlink region.

acquiring the initial position of the uplink region carried in the first downlink signal, and determining the position and/or size of the uplink region according to the initial position of the uplink region and a preset stop position of the uplink region;

or,

acquiring the initial position of the uplink region and the stop position of the uplink region carried in the first downlink signal, and determining the position and/or size of the uplink region according to the initial position of the uplink region and the stop position of the uplink region;

or,

acquiring the initial position of the uplink region and the length of the uplink region carried in the first downlink signal, and determining the position and/or size of the uplink region according to the initial position of the uplink region and the length of the uplink region;

or,

determining a cut-off position of a guard interval GP zone according to the first downlink signal, taking the cut-off position of the GP zone as a starting position of the uplink zone, and determining the position and/or size of the uplink zone according to the starting position of the uplink zone and a preset cut-off position of the uplink zone.

In a fourth aspect, an embodiment of the present invention provides a base station, including:

the processing module is used for determining a downlink detection position in a first time unit;

a sending module, configured to send a first downlink signal at a downlink detection position in the first time unit, and to notify a terminal to determine, according to the first downlink signal, a downlink region corresponding to the downlink detection position and/or an uplink region corresponding to the downlink region.

In a possible embodiment, the processing module is specifically configured to:

determining a downlink detection position in a first time unit, and notifying the downlink detection position in the first time unit to a terminal through a high-level signaling; or,

determining a downlink detection position in the first time unit according to a predetermined agreement with a terminal; or,

and sending a second downlink signal at a specific position in each or specific first time unit, wherein the second downlink signal is used for informing the terminal of the downlink detection positions in the first time unit in which the second downlink signal is detected or the N1 first time units starting from the first time unit in which the second downlink signal is detected or the N2 first time units after the first time unit in which the second downlink signal is detected, and N1 and N2 are integers greater than or equal to 1.

In a possible embodiment, the processing module is further configured to:

after determining the downlink detection position in the first time unit, before the sending module sends the first downlink signal at the downlink detection position in the first time unit,

measuring adjacent cell interference before the downlink detection position, determining adjacent cell interference strength and an adjacent cell interference area, and determining the size of a first protection interval GP area according to the adjacent cell interference strength and the adjacent cell interference area; and/or

And determining a TA (time advance) value of a terminal performing uplink transmission in an uplink region after the downlink detection position, and determining the size of a second guard interval GP region according to the maximum value in the TA value of the terminal.

In a possible embodiment, the processing module is further configured to:

and adjusting a downlink region corresponding to the downlink detection position and/or an uplink region corresponding to the downlink detection position according to the size of the first GP region and/or the size of the second GP region.

In a possible implementation, the sending module is further configured to:

and informing the size of the first GP zone to a neighbor base station.

or,

In a fifth aspect, an embodiment of the present invention provides another terminal, where the terminal includes a processor, a memory, and a transceiver, where the transceiver is configured to receive and transmit data under control of the processor, the memory stores a preset program, and the processor is configured to read the program in the memory, and perform the following processes according to the program:

determining a downlink detection position in a first time unit, and detecting a first downlink signal at the downlink detection position in the first time unit;

and determining a downlink region corresponding to the downlink detection position and/or an uplink region corresponding to the downlink detection position according to the first downlink signal.

In a sixth aspect, an embodiment of the present invention further provides a base station, where the base station includes a processor, a memory, and a transceiver, where the transceiver is configured to receive and transmit data under control of the processor, the memory stores a preset program, and the processor is configured to read the program in the memory, and perform the following processes according to the program:

determining a downlink detection position in a first time unit;

and sending a first downlink signal at a downlink detection position in the first time unit through a transceiver, wherein the first downlink signal is used for informing a terminal to determine a downlink region corresponding to the downlink detection position and/or an uplink region corresponding to the downlink region according to the first downlink signal.

Based on the above technical solution, in the embodiment of the present invention, the terminal determines the downlink detection position in the first time unit, detects the first downlink signal at the downlink detection position, and determines the downlink region corresponding to the downlink detection position and/or the uplink region corresponding to the downlink detection position according to the first downlink signal, so that the uplink region and/or the downlink region can be dynamically determined according to the downlink detection position and the first downlink signal, and dynamic adjustment of uplink and downlink resources can be implemented in a future communication system.

Drawings

FIG. 1 is a schematic structural diagram of FS 2;

fig. 2a is a schematic diagram of dynamically adjusting lengths of a part of a downlink region and a GP region in an embodiment of the present invention;

FIG. 2b is a schematic diagram illustrating dynamic adjustment of lengths of a portion of an up run region and a GP region in an embodiment of the present invention;

fig. 2c is a schematic diagram of dynamically adjusting the lengths of the downlink region, the GP region, and the uplink region in the embodiment of the present invention;

fig. 3 is a schematic processing flow diagram of a terminal side in a downlink transmission process in an embodiment of the present invention;

fig. 4 is a schematic processing flow diagram of the base station side in the downlink transmission process in the embodiment of the present invention;

fig. 5 is a schematic processing flow diagram of another terminal side in a downlink transmission process in the embodiment of the present invention;

fig. 6 is a schematic processing flow diagram of another base station side in a downlink transmission process according to an embodiment of the present invention;

FIG. 7 is a diagram illustrating a subframe structure according to a first embodiment of the present invention;

FIG. 8 is a diagram illustrating another subframe structure according to the first embodiment of the present invention;

FIG. 9 is a diagram illustrating a subframe structure according to a second embodiment of the present invention;

FIG. 10 is a diagram illustrating another subframe structure according to a second embodiment of the present invention;

fig. 11 is a schematic structural diagram of a terminal according to an embodiment of the present invention;

FIG. 12 is a diagram illustrating a base station structure according to an embodiment of the present invention;

fig. 13 is a schematic structural diagram of another terminal according to an embodiment of the present invention;

FIG. 14 is a diagram illustrating another exemplary base station;

fig. 15 is a schematic structural diagram of another terminal according to an embodiment of the present invention;

FIG. 16 is a diagram illustrating another exemplary base station structure;

fig. 17 is a schematic structural diagram of another terminal according to an embodiment of the present invention;

fig. 18 is a schematic structural diagram of another base station in the embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the following description, the implementation of the network side and the terminal side is described first, and finally the implementation of the network side and the terminal side is described separately, but this does not mean that the two are necessarily implemented in combination, and actually, when the network side and the terminal side are implemented separately, the problems existing on the network side and the terminal side are solved, and only when the two are used in combination, a better technical effect is obtained.

In the embodiment of the invention, in order to realize the dynamic adjustment of uplink and downlink resources in a future communication system, a downlink transmission method is provided, and the core idea of the method is as follows: one time unit comprises a downlink area, a GP area and an uplink area, the base station dynamically determines the time length of the GP area according to the transmission requirement of the system, when the size of the GP region is dynamically determined, the size of the GP region may be determined by dynamically adjusting the length of a portion of the downlink region and the GP region (e.g., fixing the length of the uplink transmission portion), or dynamically adjusting the length of a portion of the upstream region and the GP region (e.g., the length of a fixed downstream transmission portion), or dynamically adjusting the length of the downstream region, the GP region, and the upstream region, as shown in figure 2a is a schematic diagram of dynamically adjusting the length of a portion of the downlink region and the GP region, as shown in figure 2b is a schematic diagram of dynamically adjusting the length of a portion of the up run zone and the GP zone, fig. 2c is a schematic diagram illustrating the dynamic adjustment of the lengths of the downlink region, the GP region, and the uplink region.

Based on this idea, in the embodiment of the present invention, a processing flow of the terminal side in the downlink transmission process is as shown in fig. 3, which specifically includes the following steps:

step 301: the terminal determines a downlink detection position in a first time unit and detects a first downlink signal at the downlink detection position in the first time unit.

In the embodiment of the present invention, the terminal determines the downlink detection position in the first time unit, which includes but is not limited to the following implementation manners:

first, the terminal determines the downlink detection position in the first time unit according to the high-level signaling.

Secondly, the terminal determines the downlink detection position in the first time unit according to the predetermined convention with the base station.

Thirdly, the terminal detects the second downlink signal at a specific position in each or a specific first time unit, and determines downlink detection positions in the first time unit in which the second downlink signal is detected or the N1 first time units beginning with the first time unit in which the second downlink signal is detected or the N2 first time units after the first time unit in which the second downlink signal is detected according to the second downlink signal, wherein N1 and N2 are integers greater than or equal to 1.

For example, in a third implementation, the terminal detects on the first Y symbols in each or a specific first time unit, or blindly detects from a starting position in each or a specific first time unit. If the second downlink signal is sent in each first time unit, the downlink detection position of the second downlink signal may be changed for each first time unit, for example, the downlink detection position of the second first time unit may be different from the downlink detection position of the first time unit, that is, the downlink detection position of each first time unit is indicated independently; if the second downlink signal is sent in a specific first time unit, which is equivalent to that the second downlink signal is sent periodically or intermittently, for example, it is assumed that the second downlink signal is sent once in every 4 first time units, and it is assumed that the second downlink signal is sent once in the first time unit i and the first time unit i +4, and downlink detection positions indicated by the second downlink signals sent in the two first time units may be the same or different, one implementation manner is as follows: the first time unit i to the first time unit i +3 determine the downlink detection position thereof according to the second downlink signal sent in the first time unit i, and the first time unit i +4 to the first time unit i +7 determine the downlink detection position thereof according to the second downlink signal sent in the first time unit i +4, in another implementation manner: only the first time unit i, the first time unit i +4, the first time unit i +8, and the like, include the downlink detection position, and the remaining first time units do not include the downlink detection position, the uplink and downlink area division in these first time units may be determined by referring to the first time unit including the downlink detection position in front thereof, or by operating according to a default uplink and downlink area division manner, or according to the configuration signaling or the first downlink signal received in front.

In a specific implementation manner of the third implementation manner, if the first downlink signal is used to notify the size of the downlink region in the first time unit, the second downlink signal is also used to notify the position and/or size of the uplink region in the first time unit; if the first downlink signal is used to notify the size of the uplink region in the first time unit, the second downlink signal is also used to notify the position and/or size of the downlink region in the first time unit.

In various implementations of determining the downlink detection position, the downlink detection position is a position of a specific second time unit in the first time unit, where the second time unit is smaller than the first time unit.

Specifically, the second time unit is a symbols, or B mini-slots, or C slots, or D subframes; the method comprises the following steps that a mini-slot is a minimum scheduling unit, one mini-slot comprises E symbols, one slot comprises one or more mini-slots, one subframe comprises one or more slots, and A, B, C, D, E is a preset or predefined value which is larger than or equal to 1. It should be noted that the symbols described herein may be Orthogonal Frequency Division Multiplexing (OFDM) symbols or Single-carrier Frequency-Division Multiple Access (SC-FDMA) symbols or other Multiple Access symbols.

In the embodiment of the present invention, the first downlink signal and/or the second downlink signal are transmitted through a physical downlink control channel, or transmitted through a broadcast channel. Wherein, the physical downlink control channel is terminal-specific (transmitted in USS), or shared by a group of terminals, or shared by all terminals (transmitted in CSS); the physical downlink control channel is transmitted according to a legacy PDCCH mode, and legacy DCI or short DCI may be used.

Step 302: and the terminal determines a downlink region corresponding to the downlink detection position and/or an uplink region corresponding to the downlink detection position according to the first downlink signal.

In the embodiment of the present invention, the terminal determines the downlink region corresponding to the downlink detection position according to the first downlink signal, which includes but is not limited to the following two specific implementation manners:

in a first mode, a terminal acquires an ending position of a downlink region carried in a first downlink signal, and takes a downlink detection position or a downlink detection position in N3 first time units after a first time unit or a downlink starting position in N3 first time units after the first time unit as a starting position of the downlink region;

in the second mode, the terminal acquires the start position of the guard interval GP carried in the first downlink signal, and determines the start position of the GP as the end position of the downlink region by using the downlink detection position or the downlink detection position in the N3 first time units after the first time unit or the downlink start position in the N3 first time units after the first time unit as the start position of the downlink region.

In the embodiment of the present invention, the terminal determines the uplink region corresponding to the downlink detection position according to the first downlink signal, which includes but is not limited to the following implementation manners:

in the first mode, a terminal acquires an initial position of an uplink region carried in a first downlink signal, and determines the position and/or size of the uplink region according to the initial position of the uplink region and a preset stop position of the uplink region;

in the second mode, the terminal acquires the initial position of the uplink region and the ending position of the uplink region carried in the first downlink signal, and determines the position and/or size of the uplink region according to the initial position of the uplink region and the ending position of the uplink region;

the terminal obtains the initial position of the uplink region and the length of the uplink region carried in the first downlink signal, and determines the position and/or size of the uplink region according to the initial position of the uplink region and the length of the uplink region;

and the terminal determines the cut-off position of the guard interval GP zone according to the first downlink signal, takes the cut-off position of the GP zone as the starting position of the uplink zone, and determines the position and/or size of the uplink zone according to the starting position of the uplink zone and the preset cut-off position of the uplink zone.

In the embodiment of the present invention, the size of the downlink region is the time length of the downlink region, or the time length of the downlink region that needs to be monitored (i.e. the time length of detecting the downlink control channel); or, the downlink region corresponding to the downlink detection position is a downlink region from the downlink detection position, and/or a downlink region starting from a downlink detection position in N3 first time units after the first time unit (e.g., a downlink detection position in a target first time unit that is the same as the relative position in the first time unit) or a downlink start position in N3 first time units after the first time unit (e.g., a downlink start position pre-configured or defined in the target first time unit that may not include a downlink detection position but only includes a downlink start position, where the downlink start position is used to determine a downlink region, or may also include a downlink detection position in the target first time unit that may be different from the downlink start position); or, the uplink region corresponding to the downlink detection position is an uplink region scheduled by a downlink control channel using an uplink DCI format detected at the downlink detection position, and may be, for example, an uplink region in the same time unit as the downlink detection position, or an uplink region in a time unit after the time unit where the downlink detection position is located, where the scheduling relationship is predefined or notified in the downlink control channel, or an uplink region scheduled by a downlink control channel using an uplink DCI format detected in the downlink region corresponding to the downlink detection position, or an uplink region corresponding to the downlink detection position is an uplink region for transmitting ACK/NACK feedback information of downlink transmission in the downlink region corresponding to the downlink detection position.

In the embodiment of the invention, the downlink detection position exists in each first time unit or only exists in a specific first time unit; if the downlink detection position exists only in a specific first time unit, for the first time unit without the downlink detection position, or the first time unit with the downlink detection position but without the first downlink signal detected in the downlink detection position, the downlink region and/or the uplink region in the first time unit before the first time unit with the downlink detection position and the first downlink signal detected are referred to, for example, if two downlink regions and two uplink regions exist in the previous first time unit, the downlink region and the uplink region are divided in the same manner in the first time unit.

In this embodiment of the present invention, the first time unit includes N second time units, or the first time unit is one or more slots, or one or more subframes, or one or more radio frames.

In the embodiment of the present invention, the first downlink signal is a downlink control channel using a downlink DCI format, or a downlink control channel using an uplink DCI format.

In this embodiment of the present invention, when the first downlink signal is at least used to determine a downlink region corresponding to the downlink detection position, the first downlink signal is a downlink control channel using a downlink DCI format (i.e., carrying a downlink scheduling signaling), and may be dedicated to a UE, or may be common to UEs in a group (group) or all UEs;

when the first downlink signal is used at least for determining an uplink region corresponding to the downlink detection position, if the uplink region is the uplink region scheduled by the downlink control channel using the uplink DCI format detected in the downlink detection position or the downlink region corresponding to the downlink detection position, the first downlink signal is the downlink control channel using the uplink DCI format (i.e. carrying uplink scheduling signaling), if the uplink region is an uplink region for transmitting the downlink ACK/NACK feedback information in the downlink region corresponding to the downlink detection position, the first downlink signal is a downlink control channel corresponding to the downlink transmission using a downlink DCI format (i.e. carrying uplink scheduling signaling), the downlink control channel may be UE-specific, or may be for a group of UEs or all UEs common.

Based on the same inventive concept, in the embodiment of the present invention, a processing flow of the base station side in the downlink transmission process is as shown in fig. 4, which is specifically as follows:

step 401: the base station determines a downlink detection position in a first time unit.

In the embodiment of the present invention, the base station determines the downlink detection position in the first time unit, which includes but is not limited to the following implementation manners:

in the first mode, a base station determines a downlink detection position in a first time unit and informs a terminal of the downlink detection position in the first time unit through a high-level signaling;

in the second mode, the base station determines the downlink detection position in the first time unit according to the predetermined agreement with the terminal;

third, the base station transmits the second downlink signal at a specific position in each or a specific first time unit, for notifying the terminal of the downlink detection position in the N1 first time units beginning with the first time unit in which the second downlink signal is detected or the N2 first time units after the first time unit in which the second downlink signal is detected, where N1 and N2 are integers greater than or equal to 1.

For example, in the third implementation manner, the base station transmits the second downlink signal on the first Y symbols in each or a specific first time unit, or selects a position from the starting position in each or a specific first time unit to transmit the second downlink signal. If the second downlink signal is sent in each first time unit, the downlink detection position of the second downlink signal may be changed for each first time unit, for example, the downlink detection position of the second first time unit may be different from the downlink detection position of the first time unit, that is, the downlink detection position of each first time unit is indicated independently; if the second downlink signal is sent in a specific first time unit, which is equivalent to that the second downlink signal is sent periodically or intermittently, for example, it is assumed that the second downlink signal is sent once in every 4 first time units, and it is assumed that the second downlink signal is sent once in the first time unit i and the first time unit i +4, and downlink detection positions indicated by the second downlink signals sent in the two first time units may be the same or different, one implementation manner is as follows: the first time unit i to the first time unit i +3 determine the downlink detection position thereof according to the second downlink signal sent in the first time unit i, and the first time unit i +4 to the first time unit i +7 determine the downlink detection position thereof according to the second downlink signal sent in the first time unit i +4, in another implementation manner: only the first time unit i, the first time unit i +4, the first time unit i +8, and the like, include the downlink detection position, and the remaining first time units do not include the downlink detection position, the uplink and downlink area division in these first time units may be determined by referring to the first time unit including the downlink detection position in front thereof, or by operating according to a default uplink and downlink area division manner, or according to the configuration signaling or the first downlink signal received in front.

In a specific embodiment of the third mode, if the first downlink signal is used to notify the size of the downlink region in the first time unit, the second downlink signal is also used to notify the position and/or size of the uplink region in the first time unit; if the first downlink signal is used to notify the size of the uplink region in the first time unit, the second downlink signal is also used to notify the position and/or size of the downlink region in the first time unit.

In the embodiment of the present invention, the downlink detection position is a position of a specific second time unit in the first time unit, where the second time unit is smaller than the first time unit.

Specifically, the second time unit is a symbols, or B mini-slots, or C slots, or D subframes; the mini-slots are minimum scheduling units, one mini-slot includes E symbols, one slot includes one or more mini-slots, one subframe includes one or more slots, and A, B, C, D, E is a preconfigured or predefined value greater than or equal to 1. It should be noted that the symbols described herein may be OFDM symbols or SC-FDMA symbols or other multiple access symbols.

Step 402: the base station sends a first downlink signal at a downlink detection position in a first time unit, and is used for informing the terminal to determine a downlink region corresponding to the downlink detection position and/or an uplink region corresponding to the downlink region according to the first downlink signal.

In a specific embodiment, after a base station determines a downlink detection position in a first time unit and before the downlink detection position in the first time unit sends a first downlink signal, the base station performs neighbor cell interference measurement before the downlink detection position to determine a neighbor cell interference strength and a neighbor cell interference region, and determines the size of a first GP region according to the neighbor cell interference strength and the neighbor cell interference region, where the first GP region is a GP region required to avoid neighbor cell interference; and/or the base station determines a TA (time advance) value of a terminal which carries out uplink transmission in an uplink region after the downlink detection position, and determines the size of a second GP region according to the maximum value in the TA value of the terminal, wherein the second GP region is the GP region required for avoiding uplink and downlink interference.

Based on the specific embodiment, the base station adjusts the downlink region corresponding to the downlink detection position and/or the uplink region corresponding to the downlink detection position according to the size of the first GP region and/or the size of the second GP region. Optionally, the base station notifies the size of the first GP region to the neighboring base station.

Based on the specific embodiment, the first downlink signal carries the size of the downlink region corresponding to the downlink detection position, and/or carries the size of the uplink region corresponding to the downlink detection position, and/or carries the size of a GP region, where the size of the GP region is the size of the first GP region and/or the second GP region, or is the size of a GP region determined according to the size of the first GP region and/or the second GP region.

Specifically, the first downlink signal carries an end position of the downlink region, and the downlink detection position or a downlink detection position in N3 first time units after the first time unit or a downlink start position in N3 first time units after the first time unit is taken as a start position of the downlink region;

or,

In the embodiment of the present invention, the size of the downlink region is a time length of the downlink region (i.e., a time length for detecting a downlink control channel), or a time length of the downlink region that needs to be monitored; or the downlink region corresponding to the downlink detection position is a downlink region from the downlink detection position, and/or a downlink region starting from a downlink detection position in N3 first time units after the first time unit (e.g., a downlink detection position in a target first time unit that is the same as the relative position in the first time unit) or a downlink start position in N3 first time units after the first time unit (e.g., a downlink start position pre-configured or defined in the target first time unit, which may not include a downlink detection position but only includes a downlink start position, which is used to determine a downlink region, or a downlink detection position, which may be different from the downlink start position, may also be included in the target first time unit); or, the uplink region corresponding to the downlink detection position is an uplink region scheduled by a downlink control channel using an uplink DCI format detected at the downlink detection position, and may be, for example, an uplink region in the same time unit as the downlink detection position, or an uplink region in a time unit after the time unit where the downlink detection position is located, where the scheduling relationship is predefined or notified in the downlink control channel, or an uplink region scheduled by a downlink control channel using an uplink DCI format detected in the downlink region corresponding to the downlink detection position, or an uplink region used for transmitting ACK/NACK feedback information of downlink transmission in the downlink region corresponding to the downlink detection position.

In this embodiment of the present invention, the first time unit includes N second time units, or the first time unit is one or more slot slots, or one or more subframes, or one or more radio frames.

In this embodiment of the present invention, the first downlink signal is a downlink control channel using a downlink DCI format, or a downlink control channel using an uplink DCI format.

Based on the same inventive concept, in the embodiment of the present invention, a processing flow of the terminal side in the downlink transmission process is as shown in fig. 5, which specifically includes the following steps:

step 501: the terminal determines a downlink detection position in a first time unit.

Here, the specific manner of determining the downlink detection position in the first time unit by the terminal is the same as that in step 301, and the specific implementation manner may refer to the detailed description of step 301, and is not repeated here.

Step 502: and the terminal determines a downlink region corresponding to the downlink detection position and/or an uplink region corresponding to the downlink detection position through blind detection.

Specifically, the terminal determines a downlink region corresponding to the downlink detection position through blind detection, and the specific process is as follows: and the terminal detects the received power of the signal on each symbol or mini-slot or second time unit from the downlink detection position, determines the position of which the first received power is smaller than a preset threshold value as the cut-off position of the downlink region, and takes the downlink detection position or the downlink starting position in N3 first time units after the downlink detection position or the first time unit as the starting position of the downlink region.

Specifically, the terminal determines an uplink region corresponding to the downlink detection position through blind detection, and the specific process is as follows: and the terminal starts to detect the downlink control channel from the downlink detection position and determines an uplink region according to the detected downlink control channel or the uplink feedback resource size and/or the uplink shared channel resource size indicated in the downlink control channel.

For example, when a downlink control channel using a downlink DCI format is detected, where the downlink control channel indicates the size and position of an uplink feedback resource carrying ACK/NACK, the region is a corresponding uplink region, or the downlink control channel does not indicate the position of the uplink feedback resource carrying ACK/NACK, the feedback position is determined according to a predefined feedback timing sequence, and the size of the feedback resource may be notified by the downlink control channel, or predefined or configured, so that the corresponding uplink region may also be determined; for example, if a downlink control channel using the uplink DCI format is detected, and the position and size of an uplink resource of an uplink shared channel are indicated in the downlink control channel, the corresponding uplink region may be determined according to the uplink resource indicated by the downlink control channel.

Based on the same inventive concept, in the embodiment of the present invention, a processing flow of the base station side in the downlink transmission process is as shown in fig. 6, which is specifically as follows:

step 601: the base station determines a downlink detection position in a first time unit.

The specific implementation of the base station determining the downlink detection position of the first time unit may refer to the detailed description of step 401, and is not repeated here.

Step 602: and the base station determines an uplink region and/or a downlink region corresponding to the downlink detection position in the first time unit according to actual requirements, and performs corresponding data transceiving in the corresponding region.

Specifically, the base station sends downlink transmission to the terminal in a downlink region corresponding to the downlink detection position, where the downlink transmission includes sending a downlink control channel using a downlink DCI format, a downlink control channel using an uplink DCI format, and a downlink shared channel, where the end positions of all time domain positions occupied by these channels are the end positions of the downlink region, and the downlink detection position or a downlink start position in N3 first time units after the downlink detection position or the first time unit is used as the start position of the downlink region; in this way, when the terminal starts to detect the signal in the blind manner from the downlink detection position, the terminal can always detect the received power exceeding the preset threshold value in the downlink region determined by the base station, so as to determine the downlink region in which the base station sends downlink transmission.

Specifically, when the base station transmits downlink transmission requiring ACK/NACK feedback in a downlink region (for example, a downlink control channel or a downlink shared channel indicating release of downlink SPS resources), the base station receives uplink transmission of the terminal in an uplink region corresponding to the downlink detection position. For example, a base station sends a downlink control channel using a downlink DCI format, where ACK/NACK feedback is required to be performed, where the downlink control channel indicates the size and position of an uplink feedback resource carrying ACK/NACK, the region is a corresponding uplink region, or the downlink control channel does not indicate the position of the uplink feedback resource carrying ACK/NACK, the position of the feedback resource is determined according to a predefined feedback timing sequence, and the size of the feedback resource may be notified by the downlink control channel or predefined or configured, or the corresponding uplink region may also be determined; for example, if the base station transmits a downlink control channel using an uplink DCI format, and the downlink control channel indicates the position and size of an uplink resource of one uplink shared channel, the corresponding uplink region can be determined based on the indicated uplink resource.

The downlink transmission process provided by the embodiment of the present invention is described in detail by two specific embodiments.

First embodiment

As shown in fig. 7, it is assumed that the length of one first time unit is one slot (slot), one slot includes 7 OFDM symbols, and one subframe (subframe) includes 2 slots; assuming that the length of one second time unit is one OFDM symbol; further, it is assumed that the switching time from the downlink to the uplink is 20us, and the length of one OFDM symbol is 66.7 us. It should be noted that the values of the parameters described herein are only examples, and are not used to limit the value range of the parameters, and the scope of the present invention is not limited thereto.

A base station side:

the base station determines to divide a slot into an uplink region and a downlink region, wherein a GP is arranged between the uplink region and the downlink region, the uplink region is assumed to be fixed to a last OFDM symbol of the slot, and the starting position of the downlink region is assumed to be fixed to a first OFDM symbol of the slot, that is, the downlink detection position is fixed to a first OFDM symbol of the slot. It should be noted that the uplink and downlink division described herein is only an example, and the scope of the present invention is not limited thereto.

The base station informs the terminal of a slot uplink and downlink division mode through high-level signaling or configuration information sent at a specific position. The configuration information sent by the specific location may be sent periodically, for example, sent on the first N OFDM symbols in each slot or each subframe or multiple slots or multiple subframes, where a value of N is greater than or equal to 1. Or, the base station and the terminal may also agree in advance on a slot uplink and downlink division manner, so that signaling notification is not required.

In this specific embodiment, the base station determines, according to step a or step B or in combination with steps a and B, the size of a GP required in a current slot of a current subframe, and further determines the size of a downlink region in the slot, where the size of an uplink region is fixed, specifically:

step A: a base station determines how many uplink data which need to be sent by each terminal exist in an uplink region in a current slot, and takes the maximum value of Timing Advance (TA) values of each terminal which needs to send the uplink data as a TA value for determining GP 1;

and B: the method comprises the steps that a base station carries out neighbor cell interference measurement in an uplink region before a current slot to obtain the strength of neighbor cell interference, whether GP2 for resisting the neighbor cell interference needs to be reserved in a GP part is determined according to the strength, the base station can adjust a downlink region of a cell according to the GP2, or the base station can inform the GP2 to a neighbor cell base station to which the measured interference belongs while adjusting the downlink region of the cell according to the GP2, the neighbor cell base station adjusts the uplink or downlink region of the neighbor cell according to the GP2 to avoid the neighbor cell interference, or the base station can directly inform the GP2 to the neighbor cell base station to which the measured interference belongs without considering the GP2 when determining the GP and the downlink region of the cell, and the neighbor cell base station at least adjusts the downlink region of the neighbor cell according to the GP2 to avoid the interference of the uplink of the downlink region of the neighbor cell.

In the first embodiment, if it is determined only according to step a (for example, the base station pre-determines that there is no adjacent cell interference), the base station does not need to execute the process of step B, and only needs to determine an integer number of OFDM symbols meeting the requirement as an actual GP according to GP1 obtained in step a, for example, assuming that the maximum TA is determined to be 45us according to step a, it is determined that the length of GP1 is 45us, and 20us of switching time needs to be reserved, 65us needs to be reserved, and rounding up is performed, and 1 OFDM symbol is needed as an actual GP, so that it is determined that the downlink region is 5 OFDM symbols, that is, the 1 st to 5 th OFDM symbols are the downlink region.

In the second embodiment, if it is determined only according to step B (for example, the base station determines that there is no TA in advance), the base station does not need to execute the process of step a, and only needs to determine, according to GP2 obtained in step B, an integer number of OFDM symbols that meet the requirement as an actual GP, for example, assuming that it is determined according to step B that there is strong interference exceeding the threshold and the duration of the strong interference is 75us, it is determined that GP2 is 75us, and it is also necessary to reserve 20us of switching time, 95us needs to be reserved, and it is rounded up, and 2 OFDM symbols are needed as an actual GP, thereby determining that the downlink region is 4 OFDM symbols, that is, the 1 st to 4 th OFDM symbols are the downlink region.

In the third embodiment, if the determination is performed according to the steps a and B, an integer number of OFDM symbols meeting the requirement is determined as an actual GP according to GP1+ GP2, for example, assuming that the length of GP1 is determined to be 45us according to the step a, the length of GP2 is determined to be 75us according to the step B, and a 20us switching time needs to be reserved, 150us needs to be reserved altogether, rounding up is performed, 3 OFDM symbols are needed as an actual GP, and thus a downlink region is determined to be 3 OFDM symbols, that is, 1 st to 3rd OFDM symbols are a downlink region.

For any of the first to third embodiments, the determined value of GP1 and/or GP2 may also be 0, for example, if there is no uplink region where a terminal needs to transmit uplink data, GP1 is 0, and if the interference measurement does not measure strong interference, GP2 is 0.

A base station sends a downlink signal 1 on a specific resource in a current slot, and informs a terminal of the size of a downlink region in the slot through the downlink signal 1, so that the size of a GP is implicitly informed under the condition that the size of the uplink region is fixed, or directly informs the terminal of the determined size of the GP through the downlink signal 1, so that the size of the downlink region is implicitly informed under the condition that the size of the uplink region is fixed; assuming that the downlink signal 1 only occupies 1 OFDM symbol for transmission (where the method of occupying a OFDM symbol for transmission is similar, but it is changed into the first a OFDM symbols of one slot as the downlink detection position), the base station sends the downlink signal 1 on the first OFDM symbol of each slot (may occupy a fixed frequency domain position, or if it is carried in the downlink control channel, it is sent in the search space according to the search space definition of the downlink control channel, the downlink control channel may be the downlink control channel using the downlink DCI format, may be shared by all terminals or some terminals, or may be the downlink control channel dedicated to the terminal and carrying the downlink scheduling signaling, and of course, the downlink signal 1 may also be sent on a specific resource in a fixed manner in a similar broadcast manner and is unrelated to the data scheduling relationship or the feedback relationship).

In this specific embodiment, the base station repeats the above method for each slot in each subframe, and the length of GP required for different slots may be different, so the size of the downlink region indicated by the downlink signal 1 may be different.

In this specific embodiment, the base station sends a Downlink Control channel in a Downlink region of each slot, where the Downlink Control channel is in a Downlink DCI (Downlink Control Information) format, sends a Downlink shared channel scheduled by the Downlink Control channel in the Downlink region, and further receives ACK/NACK feedback in a corresponding uplink region (the uplink region may be agreed, configured, or indicated as an uplink region in the current slot, or may be agreed, configured, or indicated as an uplink region in the next slot, where only the corresponding relationship is taken as an example of the uplink region in the current slot in fig. 7) that carries ACK/NACK feedback of the Downlink shared channel; the base station transmits a downlink control channel using an uplink DCI format in a downlink region, and receives an uplink shared channel in an uplink region scheduled by the downlink control channel (the uplink region may be appointed, configured or indicated as an uplink region in a current slot, or an uplink region in a next slot, as shown in fig. 7, only the corresponding relationship is taken as an example of the uplink region in the current slot; in addition, an uplink region where ACK/NACK feedback transmission of a downlink shared channel scheduled by a downlink control channel using the downlink DCI format, which is transmitted in the same downlink region, is located may be the same as or different from an uplink region where uplink shared channel transmission scheduled by a downlink control channel using the uplink DCI format is located).

A terminal side:

the terminal receives the higher layer signaling or receives the configuration information at a specific location, and particularly, the terminal may periodically receive the higher layer signaling or the configuration information. The terminal acquires downlink detection position and uplink region division information in each slot carried in the high-level signaling, or acquires the downlink detection position and the uplink region division information in each slot carried in the configuration information; of course, the terminal may also obtain the downlink detection position and the uplink region division information in each slot according to a predetermined convention, so that it is not necessary to receive a high-level signaling or configuration information.

A terminal receives a downlink signal 1 on a specific resource of a slot0 of a subframe i, so as to obtain the size of a downlink region in the slot; assuming that the downlink signal 1 only occupies 1 OFDM symbol for transmission (where the method of occupying a OFDM symbol for transmission is similar, but it is changed into the first a OFDM symbols of one slot as the downlink detection position), the terminal receives the downlink signal 1 on the first OFDM symbol of each slot (the downlink signal 1 may occupy a fixed frequency domain position, or if the downlink signal 1 is carried in the downlink control channel, the downlink signal is detected in a search space defined according to the search space of the downlink control channel, the downlink control channel may be a downlink control channel using a downlink DCI format, may be shared by all terminals or some terminals, or may be a downlink control channel dedicated to the terminal and carrying downlink scheduling signaling; of course, the downlink signal 1 may also be sent on a specific resource in a fixed manner in a similar broadcast manner and is unrelated to the data scheduling relationship or the feedback relationship), determining the size of a downlink region according to the same transmission mode of the transmission side of the base station, if the downlink signal 1 directly informs the size of the downlink region in the slot, the size of a GP can be implicitly determined according to the size of the downlink region under the condition that the size of a UL region is fixed, or if the downlink signal 1 directly informs the determined size of the GP, the size of the downlink region can be implicitly determined according to the size of the GP under the condition that the size of the UL region is fixed.

In implementation, the terminal repeats the above method for each slot in each subframe, so as to determine the size of the downlink region in each slot, and the sizes of the downlink regions in different slots may be different.

A terminal detects a downlink control channel in a determined downlink region of each slot, and when a downlink control channel using a downlink DCI format is detected, receives a downlink shared channel scheduled by the downlink control channel, and further transmits ACK/NACK feedback information of the downlink shared channel in an uplink region corresponding to the downlink region and used for ACK/NACK feedback (the uplink region may be appointed, configured or indicated as an uplink region in a current slot, or an uplink region in a next slot, as shown in fig. 7, by taking only a corresponding relationship as an uplink region in the current slot as an example); when a downlink control channel using an uplink DCI format is detected, an uplink shared channel is transmitted in an uplink region scheduled by the downlink control channel (the uplink region may be appointed, configured, or indicated as an uplink region in a current slot, or an uplink region in a next slot, where the corresponding relationship is only the uplink region in the current slot in fig. 7 is taken as an example, and in addition, an uplink region where ACK/NACK feedback transmission of a downlink shared channel scheduled by the downlink control channel using the downlink DCI format, which is transmitted in the same downlink region, is located may be the same as or different from an uplink region where uplink shared channel transmission of the downlink control channel using the uplink DCI format is located).

In this specific embodiment, if one slot includes 2 uplink regions and two downlink detection positions, as shown in fig. 8, the specific base station and the terminal implement similar processes, except that the base station needs to send a downlink signal 1 to each downlink detection position in each slot to indicate the size of the downlink region where the downlink detection position starts, and the terminal needs to receive the downlink signals 1 at multiple downlink detection positions in one slot to obtain the size of the downlink region where the downlink detection position starts; the same holds when a first time unit is assumed to be a subframe or other time unit.

Second embodiment

As shown in fig. 9, it is assumed that the length of one first time unit is one slot, one slot includes 7 OFDM symbols, and one subframe (subframe) includes 2 slots; assuming that the length of one second time unit is one OFDM symbol; the switching time from downlink to uplink is assumed to be 20us, and the length of one OFDM symbol is assumed to be 66.7 us; it should be noted that the values of the parameters described herein are only examples, and are not used to limit the value range of the parameters, and the scope of the present invention is not limited thereto.

Side of base station

The base station side determines to divide one slot into an uplink region and a downlink region, a GP is between the uplink region and the downlink region, wherein, assuming that the downlink region is fixed to the first 2 OFDM symbols of one slot, the starting position of the downlink region is fixed to the first OFDM symbol of one slot (i.e. a downlink detection position), and assuming that the cutoff position of the uplink region is the last OFDM/SC-FDMA symbol of one slot, which is only an example here, of course, the protection range of the present invention is not limited by this, and other uplink and downlink division modes are similar to the implementation process of the present embodiment, and are not described here again.

A base station notifies an uplink and downlink division mode of a slot to a terminal through a high-level signaling or configuration information sent at a specific position, wherein the configuration information sent at the specific position can be sent periodically, for example, sent on the first N OFDM symbols in each slot or each subframe or a plurality of slots or a plurality of subframes, and N is 1 or 2; of course, the terminal and the base station may agree in advance on the uplink and downlink division mode so that signaling notification is not required.

In this specific embodiment, the base station determines the size of the GP required in the current slot of the current subframe according to step a or step B or in combination with steps a and B, and further determines the size of the uplink region in the slot, and the size of the downlink region is fixed. Specifically, the method comprises the following steps:

step A: the base station determines how many terminals need to send uplink data in an uplink region in the current slot, and takes the maximum value of the TA values of each terminal needing to send the uplink data as the TA value for determining GP 1;

and B: the method comprises the steps that a base station carries out neighbor cell interference measurement in an uplink region before a current slot to obtain the strength of neighbor cell interference, whether GP2 for resisting the neighbor cell interference in a pre-reserved region of a GP part is needed or not is determined according to the strength, the base station can adjust the uplink region of a cell according to the GP2, the base station can inform the GP2 of a neighbor cell base station to which the measured interference belongs while adjusting the uplink region of the cell according to the GP2, the neighbor cell base station adjusts the uplink or downlink region of a neighbor cell according to the GP2 to avoid the neighbor cell interference, or the base station can directly inform the GP2 of the neighbor cell base station to which the measured interference belongs without considering the GP2 when determining the GP and the uplink region of the cell, and the neighbor cell base station at least adjusts the downlink region of the neighbor cell according to the GP2 to avoid the interference of the uplink of the downlink region of the neighbor cell.

In the first embodiment, if it is determined only according to step a (for example, the base station pre-determines that there is no adjacent cell interference), the base station does not need to execute the process of step B, and only needs to determine an integer number of OFDM/SC-FDMA symbols meeting the requirement as an actual GP according to GP1 obtained in step a, for example, assuming that the maximum TA is determined to be 45us according to step a, it is determined that the length of GP1 is 45us, and a 20us switching time needs to be reserved, 65us needs to be reserved, and rounded up, and 1 OFDM symbol needs to be used as an actual GP, thereby determining that an uplink region is 4 symbols in size, that is, 4 th to 7 th OFDM/SC-FDMA symbols are uplink regions.

In the second embodiment, if it is determined only according to step B (for example, the base station determines no TA), the base station does not need to execute the process of step a, and only needs to determine an integer number of OFDM/SC-FDMA symbols meeting the requirement as an actual GP according to GP2 obtained in step B, for example, if it is determined according to step B that there is strong interference exceeding a threshold and the duration of the strong interference is 75us, it is determined that the length of GP2 is 75us, and it is also necessary to reserve 20us of switching time, 95us needs to be reserved, rounding up, and 2 OFDM symbols are needed as an actual GP, thereby determining that the uplink region is 3 symbols in size, that is, the 5 th to 7 th OFDM/SC-FDMA symbols are downlink regions.

In the third embodiment, if the determination is performed according to the steps a and B, an integer number of OFDM symbols meeting the requirement is determined as an actual GP according to GP1+ GP2, for example, assuming that the length of GP1 is determined to be 45us according to the step a, the length of GP2 is determined to be 75us according to the step B, and a 20us switching time needs to be reserved, 150us needs to be reserved altogether, rounding up is performed, 3 OFDM symbols are needed as an actual GP, and thus it is determined that an uplink region is 2 symbol in size, that is, 6 th to 7 th OFDM/SC-FDMA symbols are a downlink region.

The GP1 and the GP2 may also be 0 according to the determination result, for example, if there is no terminal in the uplink region that needs to send uplink data, the GP1 is 0, and if the interference measurement does not detect strong interference, the GP2 is 0.

A base station sends a downlink signal 1 on a specific resource in a downlink region for scheduling an uplink region in a current slot, and informs the size of the uplink region in the slot, so that the size of GP is implicitly known under the condition that the size of the downlink region is fixed; or directly informing the determined GP size, so that the size of the uplink region is implicitly informed under the condition that the size of the downlink region is fixed. Assuming that downlink signal 1 only occupies 1 OFDM symbol transmission (where the method of occupying a OFDM symbol transmission is similar but is changed to the first a OFDM symbols of one slot as a downlink detection position), assuming that the downlink region in the previous slot is used for scheduling the uplink region in the next slot, the base station transmits downlink signal 1 on the first OFDM symbol in the previous slot (may occupy a fixed frequency domain position, or if carried in a downlink control channel, the downlink control channel is defined in a search space according to a search space of the downlink control channel, the downlink control channel may be a downlink control channel using a downlink DCI format, or of course may be a downlink control channel using an uplink DCI format, specifically, if the uplink region is used for ACK/NACK feedback of downlink transmission in the downlink region, the downlink control channel may be a downlink control channel using a downlink DCI format, if the uplink region is used for uplink shared channel transmission, the downlink control channel may be a downlink control channel using an uplink DCI format (i.e., a downlink control channel for scheduling uplink shared channel transmission), and if the same downlink region has the above functions at the same time, both of the two downlink control channels may be used as a downlink signal 1, or one of the two downlink control channels may be selected as a downlink signal 1, where the downlink control channel may be shared by all or part of terminals, or may be a downlink control channel dedicated to the terminal and carrying downlink scheduling signaling; of course, the downlink signal 1 may also be sent in a fixed manner on a specific resource in a broadcast-like manner, and is not related to the data scheduling relationship or the feedback relationship), for notifying the size of the uplink region in the current slot.

The base station repeats the above method for each slot in each subframe, and the length of GP required for different slots may be different, so the size of the uplink region indicated by downlink signal 1 may be different.

A base station sends a downlink control channel using a downlink DCI format in a downlink region of each slot, sends a downlink shared channel scheduled by the downlink control channel in the downlink region, and further receives ACK/NACK feedback in a corresponding uplink region (the uplink region may be appointed, configured or indicated as an uplink region in a current slot, or an uplink region in a next slot, or an uplink region in the next slot, as shown in fig. 9, where the corresponding relationship is only an uplink region in the next slot as an example) carrying ACK/NACK feedback of the downlink shared channel; the base station transmits a downlink control channel using an uplink DCI format in a downlink region, and receives an uplink shared channel in an uplink region scheduled by the downlink control channel (the uplink region may be appointed, configured or indicated as an uplink region in a current slot, or an uplink region in a next slot, for example, only the corresponding relationship is the uplink region in the next slot in fig. 9; in addition, an uplink region where ACK/NACK feedback transmission of a downlink shared channel scheduled by a downlink control channel using the downlink DCI format transmitted in the same downlink region is located may be the same as or different from an uplink region where uplink shared channel transmission scheduled by a downlink control channel using the uplink DCI format is located).

Terminal side

A terminal receives a high-level signaling or configuration information (which can be received periodically) at a specific position, and acquires a downlink detection position and downlink region division in each slot carried in the high-level signaling or the configuration information and a cut-off position of an uplink region; of course, the terminal may also obtain the downlink detection position and the downlink region division in each slot and the cut-off position of the uplink region according to the predetermined convention, so that it is not necessary to receive the high-level signaling or the configuration information.

A terminal receives a downlink signal 1 on a specific resource in a downlink region of an uplink region in a slot0 for scheduling a subframe i, so as to obtain the size of the uplink region in a slot0 of the subframe i; assuming that downlink signal 1 only occupies 1 OFDM symbol transmission (where the method of occupying a OFDM symbol transmission is similar, but the first a OFDM symbols that become one slot are used as downlink detection positions), the terminal receives downlink signal 1 on a specific resource in the downlink region in slot1 in the previous subframe (which may occupy a fixed frequency domain position or, if carried in a downlink control channel, is detected in a search space defined according to the search space of the downlink control channel, the downlink control channel may be a downlink control channel using a downlink DCI format, or of course, a downlink control channel using an uplink DCI format, specifically, if the uplink region is used for ACK/NACK feedback of downlink transmission in the downlink region, the downlink control channel may be a downlink control channel using a downlink DCI format, if the uplink region is used for uplink shared channel transmission, the downlink control channel may be a downlink control channel using an uplink DCI format (i.e., a downlink control channel for scheduling uplink shared channel transmission), and if the same downlink region has the above functions at the same time, both of the two downlink control channels may be used as downlink signals 1, or one of the two downlink control channels is selected as a downlink signal 1, where the downlink control channel may be shared by all or part of terminals, or may be a downlink control channel dedicated to the terminal and carrying downlink scheduling signaling; certainly, the downlink signal 1 may also be sent in a fixed manner on a specific resource in a broadcast-like manner, and is not related to a data scheduling relationship or a feedback relationship), so as to determine the size of the downlink region in the same sending manner as the sending side of the base station, if the downlink signal 1 directly notifies the size of the uplink region in the slot, the size of the GP may be implicitly determined according to the size of the uplink region under the condition that the size of the downlink region is fixed, or if the downlink signal 1 directly notifies the determined size of the GP, the size of the uplink region may be implicitly determined according to the size of the GP under the condition that the size of the downlink region is fixed.

A terminal detects a downlink control channel in a determined downlink region of each slot, receives a downlink shared channel scheduled by the downlink control channel using the downlink DCI format when the downlink control channel using the downlink DCI format is detected, and further transmits ACK/NACK feedback information of the downlink shared channel in an uplink region corresponding to the downlink region for ACK/NACK feedback (the uplink region may be agreed or configured or indicated as an uplink region in a current slot, or as an uplink region in a next slot, as shown in fig. 9, only taking the correspondence relationship as an example of the uplink region in the next slot); when a downlink control channel using an uplink DCI format is detected, an uplink shared channel is transmitted in an uplink region scheduled by the downlink control channel (the uplink region may be appointed, configured, or indicated as an uplink region in a current slot, or an uplink region in a next slot, where only the corresponding relationship is the uplink region in the next slot in fig. 9 is taken as an example, and in addition, an uplink region where ACK/NACK feedback transmission of a downlink shared channel scheduled by the downlink control channel using the downlink DCI format, which is transmitted in the same downlink region, is located may be the same as or different from an uplink region where uplink shared channel transmission of the downlink control channel using the uplink DCI format is located).

In this specific embodiment, if one slot is divided into 2 uplink regions and two downlink detection positions, as shown in fig. 10, the specific base station and the terminal implement similar processes, except that the base station needs to transmit a downlink signal 1 to each downlink detection position in each slot to indicate the size of the uplink region corresponding to the downlink detection position, and the terminal needs to receive the downlink signals 1 at a plurality of downlink detection positions in one slot to obtain the size of the uplink region corresponding to the downlink detection position; the same holds when a first time unit is assumed to be a subframe or other time unit.

Further, if the sizes of the uplink region and the downlink region are adjusted simultaneously according to GP1 and GP2, the only difference is that the sizes of the downlink region and the uplink region are not fixed, when dividing the uplink region and the downlink region, the base station may only notify or agree on the downlink detection position (i.e., the downlink starting position in a time unit) and the uplink ending position, where the uplink starting position and the downlink ending position are related to the size of GP, may adjust simultaneously according to GP1 and/or GP2, and notify the terminal of the corresponding adjustment result through downlink signal 1; the same applies to the terminal side.

Based on the same inventive concept, the embodiment of the present invention provides a terminal, and specific implementation of the terminal may refer to the description of the method embodiment, and repeated details are not described again, as shown in fig. 11, the terminal mainly includes:

a first processing module 1101, configured to determine a downlink detection position in a first time unit, and detect a first downlink signal at the downlink detection position in the first time unit;

a second processing module 1102, configured to determine, according to the first downlink signal, a downlink region corresponding to the downlink detection position and/or an uplink region corresponding to the downlink detection position.

or,

Based on the same inventive concept, embodiments of the present invention provide a base station, and specific implementation of the base station may refer to related description of the method embodiments, and repeated details are not repeated, as shown in fig. 12, the base station mainly includes:

a processing module 1201, configured to determine a downlink detection position in a first time unit;

a sending module 1202, configured to send a first downlink signal at a downlink detection position in the first time unit, and to notify a terminal to determine, according to the first downlink signal, a downlink region corresponding to the downlink detection position and/or an uplink region corresponding to the downlink region.

In a possible embodiment, the processing module is specifically configured to:

In a possible embodiment, the processing module is further configured to:

In a possible implementation, the sending module is further configured to:

and informing the size of the first GP zone to a neighbor base station.

or,

Based on the same inventive concept, another terminal is further provided in the embodiments of the present invention, and specific implementation of the terminal may refer to related description of the method embodiment, and repeated details are not described again, as shown in fig. 13, the terminal mainly includes:

a first processing module 1301, configured to determine a downlink detection position in a first time unit;

a second processing module 1302, configured to determine, through blind detection, a downlink region corresponding to the downlink detection position and/or an uplink region corresponding to the downlink detection position.

Based on the same inventive concept, another base station is further provided in the embodiments of the present invention, and specific implementation of the base station may refer to related description of the method embodiments, and repeated details are not repeated, as shown in fig. 14, the base station mainly includes:

a processing module 1401, configured to determine a downlink detection position in a first time unit;

the sending module 1402 is configured to determine, according to actual requirements, an uplink region and/or a downlink region corresponding to the downlink detection position in the first time unit, and perform corresponding data transceiving in the corresponding region.

Based on the same inventive concept, another terminal is further provided in the embodiments of the present invention, and specific implementation of the terminal may refer to related description of the method embodiments, and repeated details are omitted, as shown in fig. 15, the terminal mainly includes a processor 1501, a memory 1502, and a transceiver 1503, where the transceiver 1503 is configured to receive and transmit data under the control of the processor 1501, the memory 1502 stores a preset program, and the processor 1501 is configured to read the program in the memory 1502, and execute the following processes according to the program:

In a possible embodiment, the processor is specifically configured to:

detecting a second downlink signal at a specific position in each or a specific first time unit by a transceiver, and determining downlink detection positions in the first time unit in which the second downlink signal is detected or the N1 first time units starting from the first time unit in which the second downlink signal is detected or the N2 first time units after the first time unit in which the second downlink signal is detected according to the second downlink signal, wherein N1 and N2 are integers greater than or equal to 1.

In a possible embodiment, the processor is specifically configured to:

or,

In a possible embodiment, the processor is specifically configured to:

or,

In a possible implementation manner, the size of the downlink region is a time length of the downlink region, or a time length of the downlink region that needs to be monitored; or the downlink region corresponding to the downlink detection position is a downlink region from the downlink detection position, and/or a downlink detection position in N3 first time units after the first time unit or a downlink starting position in N3 first time units after the first time unit; or, the uplink region corresponding to the downlink detection position is an uplink region scheduled by a downlink control channel using an uplink DCI format detected at the downlink detection position or in the downlink region corresponding to the downlink detection position, or the uplink region corresponding to the downlink detection position is an uplink region for transmitting ACK/NACK feedback information of downlink transmission in the downlink region corresponding to the downlink detection position.

In a possible embodiment, the downlink detection position exists in each first time unit or only in a specific first time unit; if the downlink detection position exists only in a specific first time unit, for the first time unit without the downlink detection position, or the first time unit with the downlink detection position but without the first downlink signal detected in the downlink detection position, referring to the division of the downlink region and/or the uplink region in the first time unit with the downlink detection position and the first downlink signal detected in front of the first time unit.

Based on the same inventive concept, another base station is further provided in the embodiments of the present invention, and specific implementation of the base station may refer to related descriptions of the method embodiments, and repeated descriptions are omitted, as shown in fig. 16, the base station mainly includes a processor 1601, a memory 1602, and a transceiver 1603, where the transceiver 1603 is configured to receive and transmit data under the control of the processor 1601, a preset program is stored in the memory 1602, and the processor 1601 is configured to read the program in the memory 1602, and perform the following processes according to the program:

determining a downlink detection position in a first time unit;

In a possible embodiment, the processor is specifically configured to:

and transmitting a second downlink signal at a specific position in each or a specific first time unit by the transceiver, wherein the second downlink signal is used for informing the terminal of the downlink detection position in the first time unit in which the second downlink signal is detected or the N1 first time units beginning at the first time unit in which the second downlink signal is detected or the N2 first time units after the first time unit in which the second downlink signal is detected, and N1 and N2 are integers greater than or equal to 1.

In a possible embodiment, the processor is specifically configured to:

after determining the downlink detection position in the first time unit, before transmitting, by the transceiver, the first downlink signal at the downlink detection position in the first time unit,

In a possible embodiment, the processor adjusts the downlink region corresponding to the downlink detection position and/or the uplink region corresponding to the downlink detection position according to the size of the first GP region and/or the size of the second GP region.

In a possible embodiment, the processor instructs the transceiver to notify the neighboring base station of the size of the first GP region.

or,

Based on the same inventive concept, another terminal is further provided in the embodiments of the present invention, and specific implementation of the terminal may refer to related descriptions of the method embodiments, and repeated descriptions are omitted, as shown in fig. 17, the terminal mainly includes a processor 1701, a memory 1702, and a transceiver 1703, where the transceiver 1703 is configured to receive and transmit data under the control of the processor 1701, the memory 1702 stores a preset program, and the processor 1701 is configured to read the program in the memory 1702, and execute the following processes according to the program:

determining a downlink detection position in a first time unit;

and determining a downlink region corresponding to the downlink detection position and/or an uplink region corresponding to the downlink detection position through blind detection.

Based on the same inventive concept, another base station is further provided in the embodiments of the present invention, and specific implementations of the base station may refer to related descriptions of the method embodiments, and repeated parts are not repeated, as shown in fig. 18, the base station mainly includes a processor 1801, a memory 1802, and a transceiver 1803, where the transceiver 1803 is configured to receive and transmit data under the control of the processor 1801, the memory 1802 stores a preset program, and the processor 1801 is configured to read the program in the memory 1802, and execute the following processes according to the program:

determining a downlink detection position in a first time unit;

and determining an uplink region and/or a downlink region corresponding to the downlink detection position in the first time unit according to actual requirements, and performing corresponding data transceiving in the corresponding region.

In fig. 15-18, the processors, memories, and transceivers are connected by a bus, and the bus architecture may include any number of interconnected buses and bridges, with one or more of the processors represented by the processors and various circuits of the memories represented by the memories being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver may be a plurality of elements, i.e., including a transmitter and a transceiver, providing a means for communicating with various other apparatus over a transmission medium. The processor is responsible for managing the bus architecture and the usual processing, and the memory may store data used by the processor in performing operations.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

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

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

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A downlink transmission method, comprising:

the terminal determines a downlink region in a third time unit corresponding to the downlink detection position and/or an uplink region in a third time unit corresponding to the downlink detection position according to the first downlink signal; wherein the third time unit is a subframe or a slot.

2. The method of claim 1, wherein the determining, by the terminal, the downlink detection position in the first time unit specifically includes:

3. The method of claim 2, wherein if the first downlink signal is used to inform the size of the downlink region in the first time unit, the second downlink signal is also used to inform the position and/or size of the uplink region in the first time unit;

4. The method according to any one of claims 1-3, wherein the downlink detection position is a position of a specific second time unit in the first time unit, wherein the second time unit is smaller than the first time unit.

5. The method of claim 4, wherein the second time unit is A symbols, or B mini-slots, or C slots, or D subframes; the mini-slots are minimum scheduling units, one mini-slot includes E symbols, one slot includes one or more mini-slots, one subframe includes one or more slots, and A, B, C, D, E is a preconfigured or predefined value greater than or equal to 1.

6. The method of claim 1, wherein the determining, by the terminal, the downlink region corresponding to the downlink detection position according to the first downlink signal comprises:

or,

7. The method of claim 1, wherein the terminal determining an uplink region corresponding to the downlink detection position according to the first downlink signal comprises:

or,

8. The method according to claim 1, 3, 6 or 7, wherein the size of the downlink region is the time length of the downlink region, or the time length of the downlink region needing to be monitored; or,

the uplink region corresponding to the downlink detection position is an uplink region scheduled by a downlink control channel using an uplink DCI format detected at the downlink detection position or in the downlink region corresponding to the downlink detection position, or the uplink region corresponding to the downlink detection position is an uplink region for transmitting ACK/NACK feedback information of downlink transmission in the downlink region corresponding to the downlink detection position.

9. The method according to any one of claims 1 to 3 and 5 to 7,

the downlink detection position exists in each first time unit or only in a specific first time unit;

10. The method of any of claims 1-3 and 5-7, wherein the first time unit comprises N second time units, or wherein the first time unit is one or more slot slots, or one or more subframes, or one or more radio frames.

11. The method of any one of claims 1, 3, 6, and 7, wherein the first downlink signal is a downlink control channel using a downlink DCI format or is a downlink control channel using an uplink DCI format.

12. A downlink transmission method, comprising:

a base station determines a downlink detection position in a first time unit;

the base station sends a first downlink signal at a downlink detection position in the first time unit, and is used for informing a terminal to determine a downlink region in a third time unit corresponding to the downlink detection position and/or an uplink region corresponding to the downlink region according to the first downlink signal; wherein the third time unit is a subframe or a slot.

13. The method of claim 12, wherein the base station determines the downlink detection position in the first time unit, specifically comprising:

14. The method according to claim 13, wherein if the first downlink signal is used to inform the size of the downlink region in the first time unit, the second downlink signal is also used to inform the position and/or size of the uplink region in the first time unit;

15. The method according to any one of claims 12 to 14, wherein the downlink detection position is a position of a specific second time unit in the first time unit, wherein the second time unit is smaller than the first time unit.

16. The method of claim 15, wherein the second time unit is a symbols, or B mini-slots, or C slots, or D subframes; the mini-slots are minimum scheduling units, one mini-slot includes E symbols, one slot includes one or more mini-slots, one subframe includes one or more slots, and A, B, C, D, E is a preconfigured or predefined value greater than or equal to 1.

17. The method of claim 12, wherein after the base station determines the downlink detection position in the first time unit, before the downlink detection position in the first time unit transmits the first downlink signal, the method further comprises:

18. The method of claim 17, wherein the method further comprises:

19. The method of claim 17, wherein the method further comprises:

20. The method according to claim 18, wherein the first downlink signal carries a size of a downlink region corresponding to the downlink detection position, and/or carries a size of an uplink region corresponding to the downlink detection position, and/or carries a size of a GP region, and the size of the GP region is the size of the first GP region and/or the second GP region or is the size of a GP region determined according to the size of the first GP region and/or the second GP region.

21. The method of claim 20,

the first downlink signal carries a cut-off position of the downlink region, and the downlink detection position or a downlink detection position in N3 first time units after the first time unit or a downlink start position in N3 first time units after the first time unit is taken as a start position of the downlink region;

or,

22. The method according to claim 12, 14, 18, 20 or 21, wherein the size of the downlink region is a time length of the downlink region, or a time length of the downlink region needing to be monitored; or,

23. The method according to any of claims 12-14 and 17-21, wherein the first time unit comprises N second time units, or wherein the first time unit is one or more slot slots, or one or more subframes, or one or more radio frames.

24. The method of any one of claims 12, 14, 20, and 21, wherein the first downlink signal is a downlink control channel using a downlink DCI format or is a downlink control channel using an uplink DCI format.

25. A terminal, comprising:

a second processing module, configured to determine, according to the first downlink signal, a downlink region in a third time unit corresponding to the downlink detection position and/or an uplink region in a third time unit corresponding to the downlink detection position; wherein the third time unit is a subframe or a slot.

26. The terminal of claim 25, wherein the first processing module is specifically configured to:

27. The terminal of claim 26, wherein if the first downlink signal is used to inform the size of the downlink region in the first time unit, the second downlink signal is also used to inform the position and/or size of the uplink region in the first time unit;

28. The terminal according to any of claims 25-27, wherein the downlink detection position is a position of a specific second time unit in the first time unit, wherein the second time unit is smaller than the first time unit.

29. The terminal of claim 28, wherein the second time unit is a symbols, or B mini-slots, or C slots, or D subframes; the mini-slots are minimum scheduling units, one mini-slot includes E symbols, one slot includes one or more mini-slots, one subframe includes one or more slots, and A, B, C, D, E is a preconfigured or predefined value greater than or equal to 1.

30. The terminal of claim 25, wherein the second processing module is specifically configured to:

or,

31. The terminal of claim 25, wherein the second processing module is specifically configured to:

or,

32. The terminal according to claim 25, 27, 30 or 31, wherein the size of the downlink region is a time length of the downlink region, or a time length of the downlink region that needs to be monitored; or,

33. The terminal according to any of claims 25-27, 30-31,

34. The terminal of any of claims 25-27 and 30-31, wherein the first time unit comprises N second time units, or wherein the first time unit is one or more slot slots, or one or more subframes, or one or more radio frames.

35. The terminal according to any of claims 25, 27, 30, and 31, wherein the first downlink signal is a downlink control channel using a downlink DCI format or a downlink control channel using an uplink DCI format.

36. A base station, comprising:

a sending module, configured to send a first downlink signal at a downlink detection position in the first time unit, and to notify a terminal to determine, according to the first downlink signal, a downlink region in a third time unit corresponding to the downlink detection position and/or an uplink region corresponding to the downlink region; wherein the third time unit is a subframe or a slot.

37. The base station of claim 36, wherein the processing module is specifically configured to:

38. The base station of claim 37, wherein if the first downlink signal is used to inform the size of the downlink region in the first time unit, the second downlink signal is also used to inform the position and/or size of the uplink region in the first time unit;

39. The base station of any one of claims 36 to 38, wherein the downlink detection position is a position of a specific second time unit in the first time unit, wherein the second time unit is smaller than the first time unit.

40. The base station of claim 39, wherein the second time unit is A symbols, or B mini-slots, or C slots, or D subframes; the mini-slots are minimum scheduling units, one mini-slot includes E symbols, one slot includes one or more mini-slots, one subframe includes one or more slots, and A, B, C, D, E is a preconfigured or predefined value greater than or equal to 1.

41. The base station of claim 36, wherein the processing module is further configured to:

42. The base station of claim 41, wherein the processing module is further configured to:

43. The base station of claim 41, wherein the transmitting module is further configured to:

and informing the size of the first GP zone to a neighbor base station.

44. The base station of claim 41, wherein the first downlink signal carries a size of a downlink region corresponding to the downlink detection position, and/or carries a size of an uplink region corresponding to the downlink detection position, and/or carries a size of a GP region, and the size of the GP region is the size of the first GP region and/or the second GP region or is the size of the GP region determined according to the size of the first GP region and/or the second GP region.

45. The base station of claim 44,

or,

46. The base station according to claim 36 or 38 or 42 or 44 or 45, wherein the size of the downlink region is the time length of the downlink region, or the time length of the downlink region needing to be monitored; or,

47. The base station of any of claims 36 to 38 and 41 to 45, wherein the first time unit comprises N second time units, or wherein the first time unit is one or more slot slots, or one or more subframes, or one or more radio frames.

48. The base station of any of claims 36, 38, 44 or 45, wherein the first downlink signal is a downlink control channel using a downlink DCI format or is a downlink control channel using an uplink DCI format.