CN108633087B

CN108633087B - Data transmission method, access network equipment and terminal equipment

Info

Publication number: CN108633087B
Application number: CN201710175179.8A
Authority: CN
Inventors: 马蕊香; 龙毅; 吕永霞
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2017-03-22
Filing date: 2017-03-22
Publication date: 2021-11-09
Anticipated expiration: 2037-03-22
Also published as: CN108633087A

Abstract

The application provides a data transmission method, an access network device and a terminal device, in the method, the access network device firstly determines at least one first transmission time unit in a plurality of first transmission time units contained in a subframe, the determined first transmission time unit is used for scheduling the first terminal device to carry out data transmission, and secondly, the access network device sends first scheduling information to the first terminal device, and the first scheduling information is used for indicating the determined first transmission time unit. Wherein the subframe comprises a plurality of OFDM symbols, and the first transmission time unit is composed of at least two OFDM symbols in the plurality of OFDM symbols. According to the method, the reasonable first transmission time unit is determined, so that when two wireless access technologies coexist, OFDM symbols in the subframe can be used for data transmission, and resource waste is avoided.

Description

Data transmission method, access network equipment and terminal equipment

Technical Field

The present application relates to communications technologies, and in particular, to a data transmission method, an access network device, and a terminal device.

Background

In a Long Term Evolution (LTE) system, a Short-Transmission Time interval (Short-TTI) is used as a possible minimum scheduling unit, wherein a plurality of Short-TTIs are divided within one TTI according to a fixed rule to form a fixed Short-TTI pattern. In the New Radio (NR) of 5G, a mini-slot (mini-slot) is defined as a possible minimum scheduling unit, where one mini-slot may start from any Orthogonal Frequency Division Multiplexing (OFDM) symbol of one slot and end at any OFDM symbol of one slot.

When the LTE and NR coexist, when NR resource scheduling is performed according to the mini-slot, any OFDM symbol in one slot may be used, and since the LTE short-TTI pattern is fixed, part of resources in the remaining resources in the slot after the mini-slot resource scheduling may not be used for LTE short-TTI scheduling, so that a situation where part of resources cannot be used occurs, resulting in waste of resources.

Disclosure of Invention

The application provides a data transmission method, access network equipment and terminal equipment, which are used for solving the problem of resource waste in the prior art.

A first aspect of the present application provides a data transmission method, in which an access network device first determines at least one first transmission time unit in a plurality of first transmission time units included in a subframe, where the determined first transmission time unit is used to schedule a first terminal device for data transmission, and then the access network device sends first scheduling information to the first terminal device, where the first scheduling information is used to indicate the determined first transmission time unit.

The subframe comprises a plurality of OFDM symbols, and the first transmission time unit is composed of at least two OFDM symbols in the plurality of OFDM symbols.

In an optional manner, the subframe is divided into the plurality of first transmission time units according to a first division manner, and the subframe is further divided into a plurality of second transmission time units according to a second division manner, wherein the first division manner is different from the second division manner;

the method further comprises the following steps:

the access network equipment determines at least one second transmission time unit in a plurality of second transmission time units contained in the subframe, wherein the determined second transmission time unit is used for scheduling the second terminal equipment to carry out data transmission; and

the access network equipment sends second scheduling information to the second terminal equipment, wherein the second scheduling information is used for indicating the determined second transmission time unit;

wherein the second tti is composed of at least two OFDM symbols of the plurality of OFDM symbols, and is consecutive to or separated from at least one second tti symbol by only one preset symbol for each first tti.

In an optional mode, the preset symbol is a 5 th, 8 th or 12 th OFDM symbol in the subframe; or the like, or, alternatively,

the preset symbol is the 5 th, 8 th, 9 th or 12 th OFDM symbol in the subframe.

In an optional manner, OFDM symbols occupied by a plurality of first transmission time units included in the subframe are known to the first terminal device; alternatively, the first and second electrodes may be,

and the access network equipment sends indication information to the first terminal equipment, wherein the indication information is used for indicating OFDM symbols occupied by a plurality of first transmission time units contained in the subframe.

In an alternative, the radio access technologies RAT used by the first terminal device and the second terminal device are different.

In an optional manner, the access network device performs data transmission with the first terminal device on the determined first transmission time unit using a first frequency domain resource, where the first frequency domain resource is a frequency domain resource shared by different RATs.

A second aspect of the present application provides a data transmission method, in the method, a terminal device receives first scheduling information sent by an access network device, where the first scheduling information is used to indicate a first transmission time unit, the indicated first transmission time unit is at least one first transmission time unit in a plurality of first transmission time units included in a subframe, and the indicated first transmission time unit is used to schedule the terminal device for data transmission.

And the terminal equipment performs data transmission with the access network equipment on the indicated first transmission time unit.

In an optional manner, OFDM symbols occupied by a plurality of first transmission time units included in the subframe are known to the terminal device; alternatively, the first and second electrodes may be,

and the terminal equipment receives indication information sent by the access network equipment, wherein the indication information is used for indicating OFDM symbols occupied by a plurality of first transmission time units contained in the subframe.

In an optional manner, the data transmission by the terminal device and the access network device on the indicated first transmission time unit includes:

and the terminal equipment uses first frequency domain resources to carry out data transmission with the access network equipment on the indicated first transmission time unit, wherein the first frequency domain resources are frequency domain resources shared by different RATs.

With regard to the first and second aspects, in an optional manner, at least one of the plurality of first tti is formed by a plurality of non-consecutive symbols in the subframe.

In an alternative, if the subframe is configured as a normal cyclic prefix CP, each of the first tti does not include the 5 th, 8 th and 12 th OFDM symbols in the subframe, or each of the first tti does not include the 5 th, 8 th, 9 th and 12 th OFDM symbols in the subframe, or each of the first tti does not include the 2 nd, 5 th, 8 th, 9 th and 12 th OFDM symbols in the subframe;

and/or the presence of a gas in the gas,

if the subframe is configured as an extended CP, each of the first tti does not include the 4 th, 7 th, and 10 th OFDM symbols in the subframe, or each of the first tti does not include the 4 th, 7 th, 8 th, and 10 th OFDM symbols in the subframe, or each of the first tti does not include the 2 nd, 4 th, 7 th, 8 th, and 10 th OFDM symbols in the subframe.

In an alternative, if the subframe is configured as a normal CP, the plurality of first transmission time units included in the subframe includes at least one of:

a first transmission time unit consisting of the 3 rd and 4 th OFDM symbols in the subframe;

a first transmission time unit consisting of the 6 th and 7 th OFDM symbols in the subframe;

a first transmission time unit consisting of the 9 th, 10 th and 11 th OFDM symbols in the subframe;

a first transmission time unit consisting of 13 th and 14 th OFDM symbols in the subframe;

a first transmission time unit consisting of the 3 rd, 4 th, 6 th and 7 th OFDM symbols in the subframe;

a first transmission time unit consisting of the 3 rd, 4 th, 6 th, 7 th and 9 th OFDM symbols in the subframe;

a first transmission time unit consisting of the 10 th and 11 th OFDM symbols in the subframe;

a first transmission time unit consisting of the 9 th, 10 th, 11 th, 13 th and 14 th OFDM symbols in the subframe;

a first transmission time unit consisting of the 4 th, 6 th and 7 th OFDM symbols in the subframe

A first transmission time unit consisting of the 4 th, 6 th, 7 th and 9 th OFDM symbols in the subframe;

a first transmission time unit consisting of the 9 th and 10 th OFDM symbols in the subframe;

a first transmission time unit consisting of 11 th, 13 th and 14 th OFDM symbols in the subframe;

a first transmission time unit consisting of 10 th, 11 th, 13 th and 14 th OFDM symbols in the subframe;

and/or the presence of a gas in the gas,

if the subframe is configured as an extended CP, the plurality of first transmission time units included in the subframe include at least one of:

a first transmission time unit consisting of the 3 rd, 5 th and 6 th OFDM symbols in the subframe;

a first transmission time unit consisting of the 8 th and 9 th OFDM symbols in the subframe;

a first transmission time unit consisting of 11 th and 12 th OFDM symbols in the subframe;

a first transmission time unit consisting of the 3 rd and 5 th OFDM symbols in the subframe;

a first transmission time unit consisting of the 6 th, 8 th and 9 th OFDM symbols in the subframe;

a first transmission time unit consisting of the 5 th and 6 th OFDM symbols in the subframe;

a first transmission time unit consisting of 8 th, 9 th, 11 th and 12 th OFDM symbols in the subframe;

a first transmission time unit consisting of the 2 nd and 3 rd OFDM symbols in the subframe;

a first transmission time unit consisting of the 2 nd, 3 rd, 5 th and 6 th OFDM symbols in the subframe;

a first transmission time unit consisting of the 5 th, 6 th, 8 th and 9 th OFDM symbols in the subframe;

a first transmission time unit consisting of the 9 th, 11 th and 12 th OFDM symbols in the subframe.

In an alternative, the first tti is a mini-slot.

A third aspect of the present application provides an access network device, where the access network device has a function of implementing the access network device in the above method design. These functions may be implemented by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-described functions.

In one possible design, the access network device may include a processor and a transceiver, and the processor and the transceiver may perform corresponding functions in the above method, such as: the processor is used for determining at least one first transmission time unit in a plurality of first transmission time units contained in a subframe, and the determined first transmission time unit is used for scheduling the first terminal equipment to carry out data transmission; a transceiver configured to send first scheduling information to the first terminal device, where the first scheduling information is used to indicate the determined first transmission time unit.

A fourth aspect of the present invention provides a terminal device, which has a function of implementing the first terminal device in the above method design. These functions may be implemented by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-described functions.

In one possible design, the terminal device may include a transceiver and a processor, and the transceiver and the processor may perform corresponding functions in the method, such as: the transceiver is used for receiving first scheduling information sent by access network equipment, wherein the first scheduling information is used for indicating a first transmission time unit, the indicated first transmission time unit is at least one first transmission time unit in a plurality of first transmission time units contained in a subframe, and the indicated first transmission time unit is used for scheduling terminal equipment to perform data transmission; a processor configured to perform data transmission with the access network device on the indicated first transmission time unit.

A fifth aspect of the present application provides an access network device, which includes a memory and a processor, where the memory is used to store program instructions, and the processor is used to call the program instructions in the memory, so as to implement the methods in the first aspect and the embodiments thereof.

A sixth aspect of the present application provides a terminal device, which includes a memory and a processor, where the memory is used to store program instructions, and the processor is used to call the program instructions in the memory, so as to implement the method in the second aspect and its embodiments.

According to the method, the reasonable first transmission time unit is determined, so that when two wireless access technologies coexist, OFDM symbols in the subframe can be used for data transmission, and resource waste is avoided.

Drawings

FIG. 1 is a schematic diagram of a short-TTI pattern in a subframe;

FIG. 2 is a schematic diagram of another short-TTI pattern in a subframe;

fig. 3 is an exemplary diagram of scheduling LTE terminal devices and 5G terminal devices on one subframe;

fig. 4 is an interaction flowchart of a first embodiment of a data transmission method provided in the present application;

FIGS. 5-40 are schematic diagrams of the patterns formed by combining the first transmission time units;

fig. 41 is a block diagram of an access network device according to a first embodiment of the present application;

fig. 42 is a block diagram of a first embodiment of a terminal device provided in the present application;

fig. 43 is an entity block diagram of a first embodiment of an access network device according to the present invention;

fig. 44 is an entity block diagram of a terminal device according to a first embodiment of the present invention.

Detailed Description

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

The access network device in the application can be a base station, and the terminal device can be a mobile phone and the like which perform data interaction with the base station.

The short-TTI is the minimum scheduling unit in LTE, and has a fixed pattern in one subframe. Specifically, when a Physical Downlink Control Channel (PDCCH) occupies 2 OFDM symbols, a short-TTI pattern in one subframe is as shown in fig. 1; when the PDCCH occupies 3 OFDM symbols, the short-TTI pattern in one subframe is as shown in fig. 2.

When LTE and 5G coexist, the access network device may schedule LTE terminal devices and 5G terminal devices simultaneously on one subframe, where the 5G uses a mini-slot as a minimum scheduling unit, and a starting position and a length of the mini-slot may not be fixed, which may cause resource waste. Exemplarily, fig. 3 is an exemplary diagram of scheduling an LTE terminal device and a 5G terminal device on one subframe, as shown in fig. 3, the subframe is a conventional Cyclic Prefix (CP), the 1 st and 2 nd symbols of the subframe are PDCCH channels, and assuming that an access network device schedules the 5G terminal device on the 3 rd, 4 th and 6 th OFDM symbols of the subframe and then needs to schedule the LTE terminal device, since the starting position of the next short-TTI in the subframe is the 8 th OFDM symbol, the access network device can only schedule the LTE terminal device on the 8 th OFDM symbol, and the 7 th OFDM symbol cannot be used for data transmission, resulting in resource waste.

Based on the above problems, the present application provides a data transmission method, which enables OFDM symbols in a subframe to be used for data transmission when LTE and 5G coexist by defining the position and length of a mini-slot in the subframe, thereby avoiding resource waste.

Fig. 4 is an interaction flowchart of a first embodiment of a data transmission method provided in the present application, and as shown in fig. 4, the process includes:

s401, the access network equipment determines at least one first transmission time unit in a plurality of first transmission time units contained in a subframe.

The first transmission time unit determined by the access network device is used for scheduling the first terminal device to perform data transmission. The first terminal device performs data transmission, where the first terminal device may send data to the access network device, or the terminal device may receive data from the access network device.

S402, the access network device sends first scheduling information to the first terminal device, wherein the first scheduling information is used for indicating the determined first transmission time unit.

And S403, the first terminal device performs data transmission with the access network device on the indicated first transmission time unit according to the first scheduling information.

Specifically, the first transmission time unit is a time domain resource, the first transmission time unit may correspond to a plurality of frequency domain resources in a frequency domain, that is, a plurality of subcarriers, and when the access network device determines to schedule the first transmission time unit of the first terminal device, the access network device further selects the first frequency domain resource from the plurality of frequency domain resources corresponding to the first transmission time unit for data transmission.

Correspondingly, the first terminal device also performs data transmission with the access network device on the indicated first transmission time unit by using the first frequency domain resource.

The first frequency domain resource is a frequency domain resource shared by different Radio Access Technologies (RATs).

Optionally, the first time unit may be a mini-slot.

The OFDM symbols occupied by the plurality of first transmission time units included in the subframe may be configured in advance on the access network device and the first terminal device, that is, the OFDM symbols occupied by the plurality of first transmission time units included in the subframe are known to both the access network device and the first terminal device. For example, when the first time unit is a mini-slot, the access network device and the first terminal device may configure in advance which mini-slots the subframe may contain, and further, as described in step S401, the access network device may select at least one of the preconfigured mini-slots to transmit data to the first terminal device, and notify the first terminal device of the mini-slot selected by the access network device through the scheduling information, and the first terminal device receives the data on the corresponding mini-slot according to the scheduling information.

Or, the access network device may notify the first terminal device of the OFDM symbols occupied by the plurality of first transmission time units included in the subframe through the indication information, that is, before step S401, the access network device may send a notification message to the first terminal device, where the notification message carries the OFDM symbols occupied by the plurality of first transmission time units included in the subframe.

The subframe comprises a plurality of OFDM symbols, and the first tti is formed by at least two OFDM symbols of the plurality of OFDM symbols, and in different subframe structures, the first tti may correspond to a specific OFDM symbol of the subframe.

Optionally, if the subframe is configured as a normal CP, each first tti does not include the 5 th, 8 th, and 12 th OFDM symbols in the subframe, or each first tti does not include the 5 th, 8 th, 9 th, and 12 th OFDM symbols in the subframe, or each first tti does not include the 2 nd, 5 th, 8 th, 9 th, and 12 th OFDM symbols in the subframe;

and/or the presence of a gas in the gas,

if the subframe is configured as the extended CP, each first tti does not include the 4 th, 7 th, and 10 th OFDM symbols in the subframe, or each first tti does not include the 4 th, 7 th, 8 th, and 10 th OFDM symbols in the subframe, or each first tti does not include the 2 nd, 4 th, 7 th, 8 th, and 10 th OFDM symbols in the subframe.

Specifically, according to the number of ports of a Cell-Specific Reference signal (CRS) and different structures of the PDCCH, OFDM symbols not included in the first transmission unit are different:

if the subframe is configured as a normal CP and there are 1 or 2 ports for a Cell-Specific Reference signal (CRS), each first transmission time unit does not include the 5 th, 8 th, and 12 th OFDM symbols in the subframe.

If the subframe is configured as an extended CP and the CRS has 1 or 2 ports, each first tti does not include the 4 th, 7 th, and 10 th OFDM symbols in the subframe.

If the subframe is configured as a normal CP, and the CRS has 4 ports, and a Physical Downlink Control Channel (PDCCH) occupies 2 or 3 OFDM symbols of the frame, each first tti does not include the 5 th, 8 th, 9 th, and 12 th OFDM symbols of the subframe.

If the sub-configuration is an extended CP, and the CRS has 4 ports, and the PDCCH occupies 2 or 3 OFDM symbols of the subframe, each first tti does not include the 4 th, 7 th, 8 th, and 10 th OFDM symbols in the subframe.

If the subframe is configured as a normal CP, and the CRS has 4 ports, and the PDCCH occupies 1 OFDM symbol of the subframe, each first tti does not include the 2 nd, 5 th, 8 th, 9 th, and 12 th OFDM symbols of the subframe;

if the subframe is configured as an extended CP, and the CRS has 4 ports, and the PDCCH occupies 1 OFDM symbol of the subframe, each first tti does not include the 2 nd, 4 th, 7 th, 8 th, and 10 th OFDM symbols of the subframe.

In some optional embodiments, possible symbol compositions of the first transmission time unit in the subframe are as follows:

if the subframe is configured as a normal CP, the plurality of first transmission time units included in the subframe includes at least one of:

a first transmission time unit consisting of the 3 rd and 4 th OFDM symbols in the subframe.

A first transmission time unit consisting of the 6 th and 7 th OFDM symbols in the subframe.

A first transmission time unit consisting of the 9 th, 10 th and 11 th OFDM symbols in the subframe.

A first transmission time unit consisting of the 13 th and 14 th OFDM symbols in the subframe.

A first transmission time unit consisting of the 3 rd, 4 th, 6 th and 7 th OFDM symbols in the subframe.

A first transmission time unit consisting of the 3 rd, 4 th, 6 th, 7 th and 9 th OFDM symbols in the subframe.

And a first transmission time unit consisting of 10 th and 11 th OFDM symbols in the subframe.

A first transmission time unit consisting of the 9 th, 10 th, 11 th, 13 th and 14 th OFDM symbols in the subframe.

A first transmission time unit consisting of the 4 th, 6 th and 7 th OFDM symbols in the subframe.

A first transmission time unit consisting of the 4 th, 6 th, 7 th and 9 th OFDM symbols in the subframe.

And a first transmission time unit consisting of the 9 th and 10 th OFDM symbols in the subframe.

A first transmission time unit consisting of the 11 th, 13 th and 14 th OFDM symbols in the OFDM symbol.

A first transmission time unit consisting of 10 th, 11 th, 13 th and 14 th OFDM symbols in the subframe. And/or the presence of a gas in the gas,

if the subframe is configured as the extended CP, the plurality of first transmission time units included in the subframe includes at least one of:

a first transmission time unit consisting of the 3 rd, 5 th and 6 th OFDM symbols in the subframe.

A first transmission time unit consisting of the 8 th and 9 th OFDM symbols in the subframe.

A first transmission time unit consisting of the 11 th and 12 th OFDM symbols in the subframe.

A first transmission time unit consisting of the 3 rd and 5 th OFDM symbols in the subframe.

a first transmission time unit consisting of the 5 th and 6 th OFDM symbols in the subframe.

A first transmission time unit consisting of 8 th, 9 th, 11 th and 12 th OFDM symbols in the subframe.

A first transmission time unit consisting of the 2 nd and 3 rd OFDM symbols in the subframe.

A first transmission time unit consisting of 2 nd, 3 rd, 5 th and 6 th OFDM symbols in the subframe.

A first transmission time unit consisting of the 5 th, 6 th, 8 th and 9 th OFDM symbols in the subframe.

It should be noted that the X-th symbol described in the embodiment of the present application is counted from 1, and the number of the OFDM symbol may be the number described in the embodiment of the present application, or may be transformed according to a certain rule, for example, the number of the 1 st OFDM symbol may be 0, and so on.

Specifically, if the subframe is configured as a normal CP and the Cell-Specific reference signal (CRS) has 1 or 2 ports, the plurality of first transmission time units included in the subframe include at least one of the following:

If the subframe is configured as an extended CP and the CRS has 1 or 2 ports, the plurality of first tti units included in the subframe includes at least one of:

If the subframe is configured as a normal CP, and the CRS has 4 ports, and the PDCCH occupies 2 or 3 OFDM symbols of the subframe, the plurality of first transmission time units included in the subframe include at least one of:

A first transmission time unit consisting of the 10 th and 11 th OFDM symbols in the subframe.

A first transmission time unit consisting of 10 th, 11 th, 13 th and 14 th OFDM symbols in the subframe.

If the sub-frame is configured as an extended CP, the CRS has 4 ports, and the PDCCH occupies 2 or 3 OFDM symbols of the sub-frame, the plurality of first tti included in the sub-frame includes at least one of:

If the subframe is configured as a normal CP, and the CRS has 4 ports, and the PDCCH occupies 1 OFDM symbol of the subframe, the plurality of first transmission time units included in the subframe include at least one of the following:

If the subframe is configured as an extended CP, the CRS has 4 ports, and the PDCCH occupies 1 OFDM symbol of the subframe, the plurality of first tti units included in the subframe includes at least one of:

It should be noted that, the above is an OFDM symbol combination that one first tti may occupy under various conditions, and in a specific implementation process, several first ttis in the multiple first ttis may be selected according to actual needs, that is, several first ttis in the first ttis may be combined as needed to form a pattern of first ttis in one subframe.

The following exemplarily shows an optional first transmission time unit pattern combined from the above-described first transmission time units.

Fig. 5-40 are schematic diagrams of patterns formed by combining the first tti units.

1. When the subframe is configured as a normal CP and the CRS has 1 or 2 ports, the pattern formed by the first tti may be the pattern described in fig. 5-19, where fig. 5-19 respectively include the cases where the PDCCH occupies 2,3, and 1 OFDM symbol in the subframe.

2. When the subframe is configured as the extended CP and the CRS has 1 or 2 ports, the pattern formed by the first tti may be the pattern described in fig. 20 to 27.

3. When the subframe is configured as a normal CP and the CRS has 4 ports, and the PDCCH occupies 2 or 3 OFDM symbols of the subframe, the pattern formed by the first tti may be the pattern described in fig. 28 to 33.

4. When the subframe is configured as the extended CP, the CRS has 4 ports, and the PDCCH occupies 2 or 3 OFDM symbols of the subframe, the pattern formed by the first tti may be the pattern described in fig. 34 to 35.

5. When the subframe is configured as a normal CP, the CRS has 4 ports, and the PDCCH occupies 1 OFDM symbol of the subframe, the pattern formed by the first tti may be the pattern described in fig. 36 to 39.

6. When the subframe is configured as an extended CP, the CRS has 4 ports, and the PDCCH occupies 1 OFDM symbol of the subframe, the pattern formed by the first tti may be the pattern described in fig. 40.

Among them, the pattern composition of the first transmission time unit in fig. 5 to 40 is described in detail in the following embodiments.

Further, the access network device may also schedule the second terminal device according to the second transmission time unit, and when the access network device schedules the second terminal device according to the second transmission time unit, the scheduling process includes:

firstly, the access network device determines at least one second transmission time unit in a plurality of second transmission time units contained in a subframe, and the determined second transmission time unit is used for scheduling the second terminal device to perform data transmission.

Secondly, the access network device sends second scheduling information to the second terminal device, wherein the second scheduling information is used for indicating the determined second transmission time unit. And then, the second terminal equipment receives data on the corresponding second transmission time unit according to the second scheduling information.

The first transmission time unit is divided by the access network equipment according to a first division mode, the second transmission time unit is divided by the access network equipment according to a second division mode, and the first division mode and the second division mode are different. The access network device may schedule the first terminal device and the second terminal device on the same subframe according to the first transmission time unit and the second transmission time unit, respectively. When the access network device schedules the first terminal device and the second terminal device on the same subframe, for each first transmission time unit, the first transmission time unit is continuous with at least one second transmission time unit symbol or only separated by one preset symbol.

Specifically, if the CRS has 1 or 2 ports, the preset symbol is the 5 th, 8 th or 12 th OFDM symbol in the subframe. If the CRS has 4 ports, the preset symbol is the 5 th, 8 th, 9 th or 12 th OFDM symbol in the subframe.

Optionally, the second TTI may be a short-TTI.

The RATs adopted by the first terminal device and the second terminal device are different. Optionally, the first terminal device may be a 5G terminal device, and the second terminal device may be an LTE terminal device.

As with the first transmission time unit, a plurality of second transmission time units included in a subframe may also be configured in advance on the access network device and the second terminal device, for example, when the second time unit is a short-TTI, the access network device and the second terminal device may configure in advance which short-TTIs the subframe may include, and further, the access network device may select at least one of the preconfigured short-TTIs to send data to the second terminal device, and notify the second terminal device of the short-TTI selected by the access network device through the scheduling information, and the second terminal device receives the data on the corresponding mini-slot according to the scheduling information.

Alternatively, when the access network device schedules the first terminal device and the second terminal device on the same subframe, the first transmission time unit and the second transmission time unit may be divided according to the patterns described in fig. 5-9, 11-13, and 28-33. Taking fig. 5 as an example, the method for dividing the second tti is shown in the bottom of fig. 5, that is, the second tti is divided according to 2,3,2,3 in a subframe, the first tti may be divided according to 2,3,2 shown in the top of fig. 5, each first tti is consecutive to each second tti or symbol, or only separated by one CRS.

The patterns of the first transmission time unit in fig. 5 to 40 are described in detail below.

It should be noted that the pattern of the first tti corresponding to the coexistence of the first tti and the second tti in fig. 5-40 may also be applied to a scenario where the first tti does not coexist with the second tti, for example, as shown in fig. 5, when the access network device only needs to schedule according to the first tti, the pattern of the first tti in fig. 5 may also be used to schedule the first terminal device.

In addition, in the diagrams related to the second transmission unit in fig. 5 to 40, the subframe includes 6 second transmission time units, and the division manner may be divided into two types. First, the first second tti is formed by the 1 st and 2 nd OFDM symbols in the subframe, the second tti is formed by the 3 rd, 4 th and 5 th OFDM symbols in the subframe, the third tti is formed by the 6 th and 7 th OFDM symbols in the subframe, the fourth tti is formed by the 8 th and 9 th OFDM symbols in the subframe, the fifth tti is formed by the 10 th and 11 th OFDM symbols in the subframe, and the sixth tti is formed by the 12 th, 13 th and 14 th OFDM symbols in the subframe. The 6 second tti units form a pattern of 2,3,2,2,2, 3. Second, the first second tti is formed by the 1 st, 2 nd, and 3 rd OFDM symbols in the subframe, the second tti is formed by the 4 th and 5 th OFDM symbols in the subframe, the third tti is formed by the 6 th and 7 th OFDM symbols in the subframe, the fourth tti is formed by the 8 th and 9 th OFDM symbols in the subframe, the fifth tti is formed by the 10 th and 11 th OFDM symbols in the subframe, and the sixth tti is formed by the 12 th, 13 th, and 14 th OFDM symbols in the subframe. The 6 second tti units form a pattern of 3,2,2,2,2, 3. In each figure, one of the above dividing manners may be used for the second tti, and is not described again in the following description of each figure.

FIG. 5:

the OFDM signal transmission method comprises 4 first transmission time units, wherein the first transmission time unit is composed of the 3 rd and 4 th OFDM symbols in a subframe, the second first transmission time unit is composed of the 6 th and 7 th OFDM symbols in the subframe, the third first transmission time unit is composed of the 9 th, 10 th and 11 th OFDM symbols in the subframe, the fourth first transmission time unit is composed of the 13 th and 14 th OFDM symbols in the subframe, and the pattern formed by the 4 first transmission time units is 2,2,3 and 2.

As can be seen from fig. 5, the first tti and the second tti are either consecutive or separated by only one CRS, and such a division can ensure that no resource is wasted in a subframe regardless of how the access network device schedules when the first tti and the second tti coexist.

In addition, the first tti avoids PDCCH control channel and CRS, and thus avoids affecting data reception and channel estimation for LTE users.

FIG. 6:

the OFDM signal transmission method comprises 3 first transmission time units, wherein the first transmission time unit is composed of 3 rd, 4 th, 6 th and 7 th OFDM symbols in a subframe, the second first transmission time unit is composed of 9 th, 10 th and 11 th OFDM symbols in the subframe, the third first transmission time unit is composed of 13 th and 14 th OFDM symbols in the subframe, and a pattern formed by the 3 first transmission time units is 4,3 and 2.

As can be seen from fig. 6, the first tti and the second tti are either consecutive or separated by only one CRS, and such a division can ensure that no resource is wasted in a subframe regardless of how the access network device schedules when the first tti and the second tti coexist.

FIG. 7:

the OFDM subframe comprises 3 first transmission time units, wherein the first transmission time unit is composed of 3 rd, 4 th, 6 th, 7 th and 9 th OFDM symbols in a subframe, the second first transmission time unit is composed of 10 th and 11 th OFDM symbols in the subframe, the third first transmission time unit is composed of 13 th and 14 th OFDM symbols in the subframe, and a pattern formed by the 3 first transmission time units is 5,2 and 2.

As can be seen from fig. 7, the first tti and the second tti are either consecutive or separated by only one CRS, and such a division can ensure that no resource is wasted in a subframe regardless of how the access network device schedules when the first tti and the second tti coexist.

FIG. 8:

the method comprises 2 first transmission time units, wherein the first transmission time unit is composed of the 3 rd, 4 th, 6 th and 7 th OFDM symbols in a subframe, the second first transmission time unit is composed of the 9 th, 10 th, 11 th, 13 th and 14 th OFDM symbols in the subframe, and the pattern formed by the 2 first transmission time units is 4 and 5.

As can be seen from fig. 8, the first tti and the second tti are either consecutive or separated by only one CRS, and such a division can ensure that no resource is wasted in a subframe regardless of how the access network device schedules when the first tti and the second tti coexist.

FIG. 9:

the OFDM signal transmission method comprises 3 first transmission time units, wherein the first transmission time unit is composed of 3 rd and 4 th OFDM symbols in a subframe, the second first transmission time unit is composed of 6 th and 7 th OFDM symbols in the subframe, the third first transmission time unit is composed of 9 th, 10 th, 11 th, 13 th and 14 th OFDM symbols in the subframe, and a pattern formed by the 3 first transmission time units is 2,2 and 5.

As can be seen from fig. 9, the first tti and the second tti are either consecutive or separated by only one CRS, and such a division can ensure that no resource is wasted in a subframe regardless of how the access network device schedules when the first tti and the second tti coexist.

FIG. 10:

the data transmission method comprises 4 first transmission time units, wherein the first transmission time unit is composed of 3 rd and 4 th OFDM symbols in a subframe, the second first transmission time unit is composed of 6 th and 7 th OFDM symbols in the subframe, the third first transmission time unit is composed of 9 th and 10 th OFDM symbols in the subframe, the fourth first transmission time unit is composed of 11 th, 13 th and 14 th OFDM symbols in the subframe, and the pattern formed by the 4 first transmission time units is 2,2,2 and 3.

As can be seen from fig. 10, the first tti and the second tti are either consecutive or separated by only one CRS, and such a division can ensure that no resource is wasted in a subframe regardless of how the access network device schedules when the first tti and the second tti coexist.

FIG. 11:

the method comprises 3 first transmission time units, wherein the first transmission time unit is composed of 4 th, 6 th and 7 th OFDM symbols in a subframe, the second first transmission time unit is composed of 9 th, 10 th and 11 th OFDM symbols in the subframe, the third first transmission time unit is composed of 13 th and 14 th OFDM symbols in the subframe, and the 3 first transmission time units form a pattern of 3,3 and 2.

As can be seen from fig. 11, the first tti and the second tti are either consecutive or separated by only one CRS, and such a division can ensure that no resource is wasted in a subframe regardless of how the access network device schedules when the first tti and the second tti coexist.

FIG. 12:

the method comprises 2 first transmission time units, wherein the first transmission time unit is composed of 4 th, 6 th and 7 th OFDM symbols in a subframe, the second first transmission time unit is composed of 9 th, 10 th, 11 th, 13 th and 14 th OFDM symbols in the subframe, and the pattern formed by the 2 first transmission time units is 3 and 5.

As can be seen from fig. 12, the first tti and the second tti are either consecutive or separated by only one CRS, and such a division can ensure that no resource is wasted in a subframe regardless of how the access network device schedules when the first tti and the second tti coexist.

FIG. 13:

the method comprises 3 first transmission time units, wherein the first transmission time unit is composed of 4 th, 6 th, 7 th and 9 th OFDM symbols in a subframe, the second first transmission time unit is composed of 10 th and 11 th OFDM symbols in the subframe, the third first transmission time unit is composed of 13 th and 14 th OFDM symbols in the subframe, and a pattern formed by the 3 first transmission time units is 4,2 and 2.

As can be seen from fig. 13, the first tti and the second tti are either consecutive or separated by only one CRS, and such a division can ensure that no resource is wasted in a subframe regardless of how the access network device schedules when the first tti and the second tti coexist.

FIG. 14:

the method comprises 3 first transmission time units, wherein the first transmission time unit is composed of 4 th, 6 th and 7 th OFDM symbols in a subframe, the second first transmission time unit is composed of 9 th and 10 th OFDM symbols in the subframe, the third first transmission time unit is composed of 11 th, 13 th and 14 th OFDM symbols in the subframe, and the 3 first transmission time units form patterns of 3,2 and 3.

As can be seen from fig. 14, the first tti avoids the control channel and CRS, and is discontinuous, thereby ensuring flexible scheduling.

FIG. 15:

the data transmission method comprises 4 first transmission time units, wherein the first transmission time unit is composed of 2 nd, 3 rd and 4 th OFDM symbols in a subframe, the second first transmission time unit is composed of 6 th and 7 th OFDM symbols in the subframe, the third first transmission time unit is composed of 9 th and 10 th OFDM symbols in the subframe, the fourth first transmission time unit is composed of 11 th, 13 th and 14 th OFDM symbols in the subframe, and a pattern formed by the 4 first transmission time units is 3,2,2 and 3.

As can be seen from fig. 15, the first tti avoids the control channel and CRS, and is discontinuous, thereby ensuring flexible scheduling.

FIG. 16:

the data transmission method comprises 3 first transmission time units, wherein the first transmission time unit is composed of 2 nd, 3 rd and 4 th OFDM symbols in a subframe, the second first transmission time unit is composed of 6 th, 7 th, 9 th and 10 th OFDM symbols in the subframe, the third first transmission time unit is composed of 11 th, 13 th and 14 th OFDM symbols in the subframe, and a pattern formed by the 3 first transmission time units is 3,4 and 3.

As can be seen from fig. 16, the first tti avoids the control channel and CRS, and is discontinuous, thereby ensuring flexible scheduling.

FIG. 17:

the data transmission method comprises 4 first transmission time units, wherein the first transmission time unit is composed of 2 nd and 3 rd OFDM symbols in a subframe, the second first transmission time unit is composed of 4 th, 6 th and 7 th OFDM symbols in the subframe, the third first transmission time unit is composed of 9 th and 10 th OFDM symbols in the subframe, the 4 th first transmission time unit is composed of 11 th, 13 th and 14 th OFDM symbols in the subframe, and a pattern formed by the 4 first transmission time units is 2,3,2 and 3.

As can be seen from fig. 17, the first tti avoids the control channel and CRS, and is discontinuous, thereby ensuring flexible scheduling.

FIG. 18:

the data transmission method comprises 3 first transmission time units, wherein the first transmission time unit is composed of 2 nd, 3 rd, 4 th, 6 th and 7 th OFDM symbols in a subframe, the second first transmission time unit is composed of 9 th and 10 th OFDM symbols in the subframe, the third first transmission time unit is composed of 11 th, 13 th and 14 th OFDM symbols in the subframe, and a pattern formed by the 3 first transmission time units is 5,2 and 3.

As can be seen from fig. 18, the first tti avoids the control channel and CRS, and is discontinuous, thereby ensuring flexible scheduling.

FIG. 19:

the OFDM signal transmission method comprises 3 first transmission time units, wherein the first transmission time unit is composed of 2 nd and 3 rd OFDM symbols in a subframe, the second first transmission time unit is composed of 4 th, 6 th and 7 th OFDM symbols in the subframe, the third first transmission time unit is composed of 9 th, 10 th, 11 th, 13 th and 14 th OFDM symbols in the subframe, and patterns formed by the 3 first transmission time units are 2,3 and 5.

As can be seen from fig. 19, the first tti avoids the control channel and CRS, and is discontinuous, thereby ensuring flexible scheduling.

FIG. 20:

the OFDM signal transmission method comprises 3 first transmission time units, wherein the first transmission time unit is composed of the 3 rd, 5 th and 6 th OFDM symbols in a subframe, the second first transmission time unit is composed of the 8 th and 9 th OFDM symbols in the subframe, the third first transmission time unit is composed of the 11 th and 12 th OFDM symbols in the subframe, and the 3 first transmission time units form a pattern of 3,2 and 2.

As can be seen from fig. 20, the first tti avoids the control channel and CRS, and is discontinuous, thereby ensuring flexible scheduling.

FIG. 21:

the OFDM signal transmission method comprises 3 first transmission time units, wherein the first transmission time unit is composed of the 3 rd and 5 th OFDM symbols in a subframe, the second first transmission time unit is composed of the 6 th, 8 th and 9 th OFDM symbols in the subframe, the third first transmission time unit is composed of the 11 th and 12 th OFDM symbols in the subframe, and the 3 first transmission time units form a pattern of 2,3 and 2.

As can be seen from fig. 21, the first tti avoids the control channel and CRS, and is discontinuous, thereby ensuring flexible scheduling.

FIG. 22:

the OFDM signal transmission method comprises 3 first transmission time units, wherein the first transmission time unit is composed of the 5 th OFDM symbol and the 6 th OFDM symbol in a subframe, the second first transmission time unit is composed of the 8 th OFDM symbol and the 9 th OFDM symbol in the subframe, the third first transmission time unit is composed of the 11 th OFDM symbol and the 12 th OFDM symbol in the subframe, and the 3 first transmission time units form a pattern of 2,2 and 2.

As can be seen from fig. 22, the first tti avoids the control channel and CRS, and is discontinuous, thereby ensuring flexible scheduling.

FIG. 23:

the method comprises 2 first transmission time units, wherein the first transmission time unit is composed of the 5 th OFDM symbol and the 6 th OFDM symbol in a subframe, the second first transmission time unit is composed of the 8 th OFDM symbol, the 9 th OFDM symbol, the 11 th OFDM symbol and the 12 th OFDM symbol in the subframe, and the 2 first transmission time units form a pattern of 2 and 4.

As can be seen from fig. 23, the first tti avoids the control channel and CRS, and is discontinuous, thereby ensuring flexible scheduling.

FIG. 24:

the data transmission method comprises 4 first transmission time units, wherein the first transmission time unit is composed of 2 nd and 3 rd OFDM symbols in a subframe, the second first transmission time unit is composed of 5 th and 6 th OFDM symbols in the subframe, the third first transmission time unit is composed of 8 th and 9 th OFDM symbols in the subframe, the fourth first transmission time unit is composed of 11 th and 12 th OFDM symbols in the subframe, and a pattern formed by the 4 first transmission time units is 2,2,2 and 2.

As can be seen from fig. 24, the first tti avoids the control channel and CRS, and is discontinuous, thereby ensuring flexible scheduling.

FIG. 25:

the OFDM signal transmission method comprises 3 first transmission time units, wherein the first transmission time unit is composed of 2 nd, 3 rd, 5 th and 6 th OFDM symbols in a subframe, the second first transmission time unit is composed of 8 th and 9 th OFDM symbols in the subframe, the third first transmission time unit is composed of 11 th and 12 th OFDM symbols in the subframe, and a pattern formed by the 3 first transmission time units is 4,2 and 2.

As can be seen from fig. 25, the first tti avoids the control channel and CRS, and is discontinuous, thereby ensuring flexible scheduling.

FIG. 26:

the OFDM signal transmission method comprises 3 first transmission time units, wherein the first transmission time unit is composed of 2 nd and 3 rd OFDM symbols in a subframe, the second first transmission time unit is composed of 5 th and 6 th OFDM symbols in the subframe, the third first transmission time unit is composed of 8 th, 9 th, 11 th and 12 th OFDM symbols in the subframe, and patterns formed by the 3 first transmission time units are 2,2 and 4.

As can be seen from fig. 26, the first tti avoids the control channel and CRS, and is discontinuous, thereby ensuring flexible scheduling.

FIG. 27 is a schematic view showing:

the OFDM signal transmission method comprises 3 first transmission time units, wherein the first transmission time unit is composed of 2 nd and 3 rd OFDM symbols in a subframe, the second first transmission time unit is composed of 5 th, 6 th, 8 th and 9 th OFDM symbols in the subframe, the third first transmission time unit is composed of 11 th and 12 th OFDM symbols in the subframe, and a pattern formed by the 3 first transmission time units is 2,4 and 2.

As can be seen from fig. 27, the first tti avoids the control channel and CRS, and is discontinuous, thereby ensuring flexible scheduling.

FIG. 28:

the OFDM signal transmission method comprises 4 first transmission time units, wherein the first transmission time unit is composed of 3 rd and 4 th OFDM symbols in a subframe, the second first transmission time unit is composed of 6 th and 7 th OFDM symbols in the subframe, the third first transmission time unit is composed of 10 th and 11 th OFDM symbols in the subframe, the fourth first transmission time unit is composed of 13 th and 14 th OFDM symbols in the subframe, and the pattern formed by the 4 first transmission time units is 2,2,2 and 2.

As can be seen from fig. 28, the first tti and the second tti are either consecutive or separated by only one CRS, and such a division can ensure that no resource is wasted in a subframe when the first tti and the second tti coexist, regardless of how the access network device schedules them.

FIG. 29:

the method comprises 3 first transmission time units, wherein the first transmission time unit is composed of the 3 rd, 4 th, 6 th and 7 th OFDM symbols in a subframe, the second first transmission time unit is composed of the 10 th and 11 th OFDM symbols in the subframe, the fourth first transmission time unit is composed of the 13 th and 14 th OFDM symbols in the subframe, and the 3 first transmission time units form a pattern of 4,2 and 2.

As can be seen from fig. 29, the first tti and the second tti are either consecutive or separated by only one CRS, and such a division can ensure that no resource is wasted in a subframe when the first tti and the second tti coexist, no matter how the access network device schedules the first tti and the second tti.

FIG. 30:

the method comprises 2 first transmission time units, wherein the first transmission time unit is composed of the 3 rd, 4 th, 6 th and 7 th OFDM symbols in a subframe, the second first transmission time unit is composed of the 10 th, 11 th, 13 th and 14 th OFDM symbols in the subframe, and the pattern formed by the 2 first transmission time units is 4 and 4.

As can be seen from fig. 30, the first tti and the second tti are either consecutive or separated by only one CRS, and such a division can ensure that no resource is wasted in a subframe regardless of how the access network device schedules when the first tti and the second tti coexist.

FIG. 31:

the OFDM signal transmission method comprises 3 first transmission time units, wherein the first transmission time unit is composed of 3 rd and 4 th OFDM symbols in a subframe, the second first transmission time unit is composed of 6 th and 7 th OFDM symbols in the subframe, the third first transmission time unit is composed of 10 th, 11 th, 13 th and 14 th OFDM symbols in the subframe, and patterns formed by the 3 first transmission time units are 2,2 and 4.

As can be seen from fig. 31, the first tti and the second tti are either consecutive or separated by only one CRS, and such a division can ensure that no resource is wasted in a subframe regardless of how the access network device schedules when the first tti and the second tti coexist.

FIG. 32:

the method comprises 3 first transmission time units, wherein the first transmission time unit is composed of 4 th, 6 th and 7 th OFDM symbols in a subframe, the second first transmission time unit is composed of 10 th and 11 th OFDM symbols in the subframe, the third first transmission time unit is composed of 13 th and 14 th OFDM symbols in the subframe, and a pattern formed by the 3 first transmission time units is 3,2 and 2.

As can be seen from fig. 32, the first tti and the second tti are either consecutive or separated by only one CRS, and such a division can ensure that no resource is wasted in a subframe when the first tti and the second tti coexist, no matter how the access network device schedules the first tti and the second tti.

FIG. 33:

the method comprises 2 first transmission time units, wherein the first transmission time unit is composed of 4 th, 6 th and 7 th OFDM symbols in a subframe, the second first transmission time unit is composed of 10 th, 11 th, 13 th and 14 th OFDM symbols in the subframe, and the 2 first transmission time units form patterns of 3 and 4.

As can be seen from fig. 33, the first tti and the second tti are either consecutive or separated by only one CRS, and such a division can ensure that no resource is wasted in a subframe when the first tti and the second tti coexist, regardless of how the access network device schedules them.

FIG. 34:

the method comprises 2 first transmission time units, wherein the first transmission time unit is composed of the 3 rd, 5 th and 6 th OFDM symbols in a subframe, the second first transmission time unit is composed of the 9 th, 11 th and 12 th OFDM symbols in the subframe, and the 2 first transmission time units form a pattern of 3 and 3.

As can be seen from fig. 34, the first tti avoids the control channel and CRS, and is discontinuous, thereby ensuring flexible scheduling.

FIG. 35:

the method comprises 2 first transmission time units, wherein the first transmission time unit is composed of the 5 th OFDM symbol and the 6 th OFDM symbol in a subframe, the second first transmission time unit is composed of the 9 th OFDM symbol, the 11 th OFDM symbol and the 12 th OFDM symbol in the subframe, and a pattern formed by the 2 first transmission time units is 2 and 3.

As can be seen from fig. 35, the first tti avoids the control channel and CRS, and is discontinuous, thereby ensuring flexible scheduling.

FIG. 36:

As can be seen from fig. 36, the first tti avoids the control channel and CRS, and is discontinuous, thereby ensuring flexible scheduling.

FIG. 37:

the OFDM subframe comprises 3 first transmission time units, wherein the first transmission time unit is composed of 3 rd, 4 th, 6 th and 7 th OFDM symbols in a subframe, the second first transmission time unit is composed of 10 th and 11 th OFDM symbols in the subframe, the third first transmission time unit is composed of 13 th and 14 th OFDM symbols in the subframe, and a pattern formed by the 3 first transmission time units is 4,2 and 2.

As can be seen from fig. 37, the first tti avoids the control channel and CRS, and is discontinuous, thereby ensuring flexible scheduling.

FIG. 38:

the data transmission method comprises 3 first transmission time units, wherein the first transmission time unit is composed of 3 rd and 4 th OFDM symbols in a subframe, the second first transmission time unit is composed of 6 th and 7 th OFDM symbols in the subframe, the third first transmission time unit is composed of 10 th, 11 th, 13 th and 14 th OFDM symbols in the subframe, and a pattern formed by the 3 first transmission time units is 2,2 and 4.

As can be seen from fig. 38, the first tti avoids the control channel and CRS, and is discontinuous, thereby ensuring flexible scheduling.

FIG. 39:

As can be seen from fig. 39, the first tti avoids the control channel and CRS, and is discontinuous, thereby ensuring flexible scheduling.

FIG. 40:

As can be seen from fig. 40, the first tti avoids the control channel and CRS, and is discontinuous, thereby ensuring flexible scheduling.

When the access network device schedules the terminal device according to the first tti, the terminal device may schedule according to a single tti as described in fig. 5 to fig. 40, and further, in some scenarios, the access network device may combine multiple ttis as shown in fig. 5 to fig. 40 to form a larger tti for scheduling the terminal device. Taking fig. 5 as an example, the access network device may combine 2,2,3,2 of 4 first tti units into 1 first tti unit, which contains 9 symbols, or the access network device may combine 2,2,3,2 of 4 first tti units into 7,2 of two first tti units. Therefore, the first tti described in this application may be the single tti described above, or may be a tti formed by combining these single ttis, and both the single tti and the tti formed by combining them are within the scope of the present application. When some terminal devices require more transmission resources and a single first transmission time unit cannot meet the scheduling requirement, the access network device may schedule the terminal device by the first transmission time unit formed by combining a plurality of first transmission time units, thereby meeting the scheduling requirement.

Fig. 41 is a block diagram of a first embodiment of an access network device provided in the present application, and as shown in fig. 41, the access network device includes:

a processor 4101 is configured to determine at least one first transmission time unit in a plurality of first transmission time units included in a subframe, where the determined first transmission time unit is used for scheduling a first terminal device for data transmission.

A transceiver 4102 for transmitting first scheduling information to the first terminal device, the first scheduling information indicating the determined first transmission time unit.

The access network device is configured to implement the corresponding function of the access network device in the foregoing method embodiment, and the implementation principle and the technical effect are similar, which are not described herein again.

In another embodiment, at least one of the first tti units is formed by a plurality of non-consecutive symbols in a subframe.

In another embodiment, if the subframe is configured as a normal CP, each first tti does not include the 5 th, 8 th, and 12 th OFDM symbols in the subframe, or each first tti does not include the 5 th, 8 th, 9 th, and 12 th OFDM symbols in the subframe, or each first tti does not include the 2 nd, 5 th, 8 th, 9 th, and 12 th OFDM symbols in the subframe;

and/or the presence of a gas in the gas,

In another embodiment, if the subframe is configured as a normal CP, the plurality of first transmission time units included in the subframe includes at least one of:

a first transmission time unit consisting of 13 th and 14 th OFDM symbols in a subframe;

a first transmission time unit consisting of 10 th and 11 th OFDM symbols in a subframe;

first transmission time unit composed of 4 th, 6 th and 7 th OFDM symbols in subframe

a first transmission time unit consisting of 11 th, 13 th and 14 th OFDM symbols in a subframe;

a first transmission time unit consisting of 10 th, 11 th, 13 th and 14 th OFDM symbols in a subframe;

and/or the presence of a gas in the gas,

a first transmission time unit consisting of 11 th and 12 th OFDM symbols in a subframe;

a first transmission time unit consisting of 8 th, 9 th, 11 th and 12 th OFDM symbols in a subframe;

a first transmission time unit consisting of 2 nd, 3 rd, 5 th and 6 th OFDM symbols in a subframe;

In another embodiment, the first tti is a mini-slot.

In another embodiment, the subframe is divided into a plurality of first transmission time units according to a first division manner, and the subframe is further divided into a plurality of second transmission time units according to a second division manner, wherein the first division manner is different from the second division manner.

The processor 4101 is further configured to:

determining at least one second transmission time unit in a plurality of second transmission time units contained in the subframe, wherein the determined second transmission time unit is used for scheduling the second terminal equipment to carry out data transmission; and

the transceiver 4102 is also configured to:

and sending second scheduling information to the second terminal equipment, wherein the second scheduling information is used for indicating the determined second transmission time unit.

The second transmission time unit is composed of at least two OFDM symbols in the plurality of OFDM symbols, and each first transmission time unit is continuously separated from at least one second transmission time unit symbol or is separated from at least one second transmission time unit symbol by only one preset symbol.

In another embodiment, the preset symbol is the 5 th, 8 th or 12 th OFDM symbol in the subframe; or the like, or, alternatively,

the preset symbol is the 5 th, 8 th, 9 th or 12 th OFDM symbol in the subframe.

In another embodiment, OFDM symbols occupied by a plurality of first transmission time units included in a subframe are known to a first terminal device; alternatively, the first and second electrodes may be,

the transceiver 4102 is also configured to:

and sending indication information to the first terminal equipment, wherein the indication information is used for indicating OFDM symbols occupied by a plurality of first transmission time units contained in the subframe.

In another embodiment, the RATs used by the first terminal device and the second terminal device are different.

In another embodiment, the transceiver 4102 is further configured to:

and performing data transmission with the first terminal device on the determined first transmission time unit by using first frequency domain resources, wherein the first frequency domain resources are frequency domain resources shared by different RATs.

Fig. 42 is a block diagram of a first embodiment of a terminal device provided in the present application, and as shown in fig. 42, the terminal device includes:

the transceiver 4201 is configured to receive first scheduling information sent by an access network device, where the first scheduling information is used to indicate a first tti, the indicated first tti is at least one of a plurality of first ttis included in a subframe, and the indicated first tti is used to schedule a terminal device for data transmission.

A processor 4202 configured to perform data transmission with the access network device on the indicated first transmission time unit.

The subframe comprises a plurality of OFDM symbols, and the first transmission time unit is composed of at least two OFDM symbols in the OFDM symbols.

The terminal device is configured to implement the function corresponding to the first terminal device in the foregoing method embodiment, and the implementation principle and the technical effect are similar, which are not described herein again.

and/or the presence of a gas in the gas,

In another embodiment, the first tti is a mini-slot.

the transceiver 4201 is further configured to:

and receiving indication information sent by the access network equipment, wherein the indication information is used for indicating OFDM symbols occupied by a plurality of first transmission time units contained in a subframe.

In another embodiment, the transceiver 4201 is further configured to:

and performing data transmission with the access network equipment on the indicated first transmission time unit by using first frequency domain resources, wherein the first frequency domain resources are frequency domain resources shared by different RATs.

Fig. 43 is an entity block diagram of an access network device according to a first embodiment of the present invention, and as shown in fig. 43, the access network device includes:

a memory 4301 and a processor 4302.

The memory 4301 is used for storing program instructions, and the processor 4302 is used for calling the program instructions in the memory 4301 to implement the functions of the access network device in the above-mentioned method embodiments.

Fig. 44 is a block diagram of an entity of a terminal device according to a first embodiment of the present invention, and as shown in fig. 44, the terminal device includes:

a memory 4401 and a processor 4402.

The memory 4401 is configured to store program instructions, and the processor 4402 is configured to invoke the program instructions in the memory 4301, so as to implement the functions of the first terminal device in the foregoing method embodiments.

Claims

1. A method of data transmission, comprising:

the access network equipment determines at least one first transmission time unit in a plurality of first transmission time units contained in a subframe, wherein the determined first transmission time unit is used for scheduling first terminal equipment to carry out data transmission;

the access network equipment sends first scheduling information to the first terminal equipment, wherein the first scheduling information is used for indicating the determined first transmission time unit;

the subframe comprises a plurality of OFDM symbols, and the first transmission time unit is composed of at least two OFDM symbols in the plurality of OFDM symbols;

the subframe is divided into a plurality of first transmission time units according to a first division mode, and is further divided into a plurality of second transmission time units according to a second division mode, wherein the first division mode is different from the second division mode;

the method further comprises the following steps:

the access network device sends second scheduling information to the second terminal device, the second scheduling information being used for indicating the determined second transmission time unit,

the first terminal device and the second terminal device use different radio access technologies, the second tti is composed of at least two OFDM symbols of the OFDM symbols, and each first tti and at least one second tti symbol are consecutive or only separated by a preset symbol, where the preset symbol is the 5 th, 8 th, or 12 th OFDM symbol in the subframe; or, the preset symbol is the 5 th, 8 th, 9 th or 12 th OFDM symbol in the subframe.

2. The method of claim 1, wherein at least one of the plurality of first transmission time units is comprised of a plurality of non-consecutive symbols in the subframe.

3. The method according to claim 1 or 2,

if the subframe is configured as a normal Cyclic Prefix (CP), each of the first transmission time units does not include the 5 th, 8 th and 12 th OFDM symbols in the subframe, or each of the first transmission time units does not include the 5 th, 8 th, 9 th and 12 th OFDM symbols in the subframe, or each of the first transmission time units does not include the 2 nd, 5 th, 8 th, 9 th and 12 th OFDM symbols in the subframe;

and/or the presence of a gas in the gas,

4. The method according to any one of claims 1 to 3,

if the subframe is configured as a normal CP, the plurality of first transmission time units included in the subframe include at least one of the following:

a first transmission time unit consisting of the 4 th, 6 th and 7 th OFDM symbols in the subframe;

and/or the presence of a gas in the gas,

5. The method according to any of claims 1 to 4, wherein the first transmission time unit is a mini-slot.

6. The method according to claim 1, wherein OFDM symbols occupied by a plurality of first transmission time units included in the subframe are known to the first terminal device; alternatively, the first and second electrodes may be,

7. The method of any of claims 1 to 6, further comprising:

and the access network equipment performs data transmission with the first terminal equipment on the determined first transmission time unit by using first frequency domain resources, wherein the first frequency domain resources are frequency domain resources shared by different RATs.

8. A method of data transmission, comprising:

a first terminal device receives first scheduling information sent by an access network device, wherein the first scheduling information is used for indicating at least one first transmission time unit, the indicated first transmission time unit is at least one first transmission time unit in a plurality of first transmission time units contained in a subframe, and the indicated first transmission time unit is used for scheduling the first terminal device to perform data transmission;

the first terminal equipment performs data transmission with the access network equipment on the indicated first transmission time unit;

the method further comprises the following steps:

the second terminal device receives second scheduling information sent by the access network device, wherein the second scheduling information is used for indicating at least one second transmission time unit, the indicated second transmission time unit is at least one second transmission time unit in a plurality of second transmission time units contained in a subframe, and the indicated second transmission time unit is used for scheduling the second terminal device to perform data transmission;

9. The method of claim 8, wherein at least one of the plurality of first transmission time units is comprised of a plurality of non-consecutive symbols in the subframe.

10. The method according to claim 8 or 9,

and/or the presence of a gas in the gas,

11. The method according to any one of claims 8 to 10,

and/or the presence of a gas in the gas,

12. The method according to any of the claims 8 to 11, wherein the first transmission time unit is a mini-slot.

13. The method according to any of claims 8-12, wherein OFDM symbols occupied by a plurality of first transmission time units included in the subframe are known to the first terminal device; alternatively, the first and second electrodes may be,

and the first terminal equipment receives indication information sent by the access network equipment, wherein the indication information is used for indicating OFDM symbols occupied by a plurality of first transmission time units contained in the subframe.

14. The method of any of claims 8-13, wherein the first terminal device transmitting data with the access network device on the indicated first transmission time unit comprises:

and the first terminal equipment uses first frequency domain resources to carry out data transmission with the access network equipment on the indicated first transmission time unit, wherein the first frequency domain resources are frequency domain resources shared by different RATs.

15. An access network device, comprising:

the processor is used for determining at least one first transmission time unit in a plurality of first transmission time units contained in a subframe, and the determined first transmission time unit is used for scheduling the first terminal equipment to carry out data transmission;

a transceiver configured to send first scheduling information to the first terminal device, the first scheduling information indicating the determined first transmission time unit;

the processor is further configured to:

the transceiver is further configured to:

sending second scheduling information to the second terminal device, wherein the second scheduling information is used for indicating the determined second transmission time unit;

16. The access network device of claim 15, wherein at least one of the plurality of first tti is comprised of a plurality of non-consecutive symbols in the subframe.

17. The access network device according to claim 15 or 16, wherein if the subframe is configured as a normal cyclic prefix CP, each of the first tti does not include the 5 th, 8 th and 12 th OFDM symbols in the subframe, or each of the first tti does not include the 5 th, 8 th, 9 th and 12 th OFDM symbols in the subframe, or each of the first tti does not include the 2 nd, 5 th, 8 th, 9 th and 12 th OFDM symbols in the subframe;

and/or the presence of a gas in the gas,

18. An access network device according to any one of claims 15-17,

and/or the presence of a gas in the gas,

19. An access network device according to any one of claims 15-18, characterised in that the first transmission time unit is a mini-slot.

20. The access network device according to claim 15, wherein the OFDM symbols occupied by the plurality of first transmission time units included in the subframe are known to the first terminal device; alternatively, the first and second electrodes may be,

the transceiver is further configured to:

and sending indication information to the first terminal device, wherein the indication information is used for indicating the OFDM symbols occupied by the plurality of first transmission time units contained in the subframe.

21. The access network device of any of claims 15-20, wherein the transceiver is further configured to:

22. A terminal device, the terminal device comprising a first terminal device and a second terminal device, the first terminal device comprising a first transceiver and a first processor, the second terminal device comprising a second transceiver and a second processor, comprising:

a first transceiver, configured to receive first scheduling information sent by an access network device, where the first scheduling information is used to indicate a first transmission time unit, the indicated first transmission time unit is at least one of a plurality of first transmission time units included in a subframe, and the indicated first transmission time unit is used to schedule a first terminal device for data transmission;

a first processor configured to perform data transmission with the access network device at the indicated first transmission time unit;

a second transceiver to:

receiving second scheduling information sent by access network equipment, wherein the second scheduling information is used for indicating at least one second transmission time unit, the indicated second transmission time unit is at least one second transmission time unit in a plurality of second transmission time units contained in a subframe, and the indicated second transmission time unit is used for scheduling second terminal equipment to perform data transmission;

a second processor to: transmitting data with the access network equipment on the indicated second transmission time unit;

23. The terminal device of claim 22, wherein at least one of the plurality of first tti is formed by a plurality of non-consecutive symbols in the subframe.

24. The terminal device according to claim 22 or 23,

and/or the presence of a gas in the gas,

25. The terminal device according to any of claims 22-24,

and/or the presence of a gas in the gas,

26. A terminal device according to any of claims 22-25, characterised in that said first transmission time unit is a mini-slot.

27. The terminal device according to any of claims 22-26, wherein OFDM symbols occupied by a plurality of first transmission time units included in the subframe are known to the first terminal device; alternatively, the first and second electrodes may be,

the first transceiver is further configured to:

and receiving indication information sent by the access network equipment, wherein the indication information is used for indicating OFDM symbols occupied by a plurality of first transmission time units contained in the subframe.

28. The terminal device of any of claims 22-27, wherein the first transceiver is further configured to: