CN107888529A

CN107888529A - A kind of information transferring method and device

Info

Publication number: CN107888529A
Application number: CN201610870419.1A
Authority: CN
Inventors: 苟伟; 毕峰; 郝鹏
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2016-09-29
Filing date: 2016-09-29
Publication date: 2018-04-06
Also published as: WO2018059356A1

Abstract

Disclosed herein is a kind of information transferring method and device, described information transmission method includes：The position for the first time slot that transmitting terminal is formed according to OFDM symbol corresponding to the first subcarrier spacing, sends control signaling, and send or receive business datum according to OFDM symbol corresponding to the first subcarrier spacing in the first time slot；Transmitting terminal allows to use OFDM symbol corresponding to all or part of first subcarrier spacing in the first time slot, the second time slot that OFDM symbol corresponding to the second subcarrier spacing is formed is sent or received, and business datum is sent or receive according to OFDM symbol corresponding to the second subcarrier spacing；Wherein, the second subcarrier spacing is more than the first subcarrier spacing, or, the duration of the first time slot is more than the duration of the second time slot.

Description

Information transmission method and device

Technical Field

The present invention relates to the field of communications technologies, and in particular, to an information transmission method and apparatus.

Background

A New Generation mobile communication system NR (New Radio) is being studied and standardized, which is also one of the work points of the current Third Generation Partnership Project (3 GPP).

In NR systems that can be determined at present, there are three typical traffic types in the future, including: eMBBs (enhanced Mobile BroadBand), URLLC (Ultra-Reliable and Low latency Communications), and mMTC (massive Machine Type Communications). These services have different requirements with respect to delay, coverage and reliability. For example, for the eMBB, high peak transmission rate is mainly emphasized, the requirement on delay is not high (no low delay requirement), and the reliability is required to be moderate; for URLLC, low-delay and high-reliability transmission is emphasized, and the requirement on delay is very strict; for mtc, a large number of medium terminals are emphasized, the connection density is high and more transmission coverage is required, and there is little requirement for latency.

NR systems will perform system networking at higher carrier frequencies than those used by second generation (2G), third generation (3G), and fourth generation (4G) mobile communication technologies. The frequency bands currently widely recognized and recognized by the industry and international organization are mainly 3GHz to 6GHz, 6GHz to 100GHz, which are basically centimeter and millimeter wave bands. Research shows that the phase noise of radio frequency devices is very serious at frequencies between 6G and 100GHz, especially at higher frequencies, and the increase of the subcarrier width of the ofdma system can resist the phase noise. The high-frequency propagation characteristic is obviously different from the low-frequency band, because the propagation loss of the high-frequency band is obviously greater than that of the low-frequency band, the coverage area of the high-frequency band is generally far smaller than that of the low-frequency band, the delay spread of a channel is smaller under the condition of smaller coverage area, the corresponding coherent bandwidth is larger than that of the low-frequency band of 300M to 3000M, and the design requirement that the subcarrier spacing is within the coherent bandwidth can still be met after the subcarrier width is increased relative to a Long Term Evolution (LTE) system. Therefore, the sub-carrier spacing (SCS, equivalent to subcarrier width) needs to be adjusted according to the height of the carrier, and the feasibility of the adjustment is both existent and reasonable.

The new generation of wireless NR systems covers carrier frequencies from 6G to 100G, and different basic frame structure parameters such as subcarrier spacing are required to adapt to the carrier frequencies, that is, the frame structure design parameters on each carrier frequency are different, for example, the closer the frequency is to the core frequency of LTE, the closer the typical frame structure parameters such as subcarrier spacing are to LTE related parameters, the higher the frequency is, the larger the subcarrier spacing is. Currently, the subcarrier spacing supported by the NR scheme is likely to exist from 3.75KHz, 7.5KHz, 15KHz, 30KHz, 60KHz, 75KHz, 120KHz, 240KHz up to 480KHz, etc.

Therefore, in the NR system, there are a plurality of scheduling units (or called slots or called transmission units) formed by different subcarrier intervals, including a plurality of Orthogonal Frequency Division Multiplexing (OFDM) symbols. It is considered how multiple scheduling units (e.g. timeslots) perform time division multiplexing transmission in one scheduling period (or referred to as subframe or referred to as transmission period) (scheduling period refers to a larger time range, e.g. multiple scheduling units (e.g. timeslots) are multiplexed in one scheduling period (e.g. subframe)). The problem of aligning OFDM symbols or scheduling units during multiplexing is an important problem to be solved.

Disclosure of Invention

The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.

The embodiment of the invention provides an information transmission method and an information transmission device, which can be used for determining time slot division formed by OFDM symbols with different subcarrier intervals and a sending mechanism of corresponding control signaling.

In a first aspect, an embodiment of the present invention provides an information transmission method, including:

a sending end sends a control signaling in a first time slot according to the position of the first time slot formed by OFDM symbols corresponding to a first subcarrier interval, and sends or receives service data according to the OFDM symbols corresponding to the first subcarrier interval;

the sending end allows a second time slot formed by OFDM symbols corresponding to a second subcarrier interval to be sent or received by using OFDM symbols corresponding to part or all of the first subcarrier intervals in the first time slot, and sends or receives service data according to the OFDM symbols corresponding to the second subcarrier interval;

the second subcarrier interval is greater than the first subcarrier interval, or the duration of the first time slot is greater than the duration of the second time slot.

Optionally, the information transmission method further includes: the sending end determines the position of the first time slot by the following method:

and forming a first time slot by the OFDM symbols corresponding to the first subcarrier interval according to the appointed number, and sequentially placing the first time slot according to the duration of the first time slot in the time direction.

Optionally, the information transmission method further includes: the transmitting end determines the position of the second time slot by the following method:

and forming a second time slot by the OFDM symbols corresponding to the second subcarrier interval according to the appointed number, and placing the second time slot in the time direction according to the time length sequence of the second time slot.

Optionally, starting boundaries of the first slot and the second slot are aligned, or a starting position of the second slot is aligned with a starting boundary of one symbol of the first slot, or an ending position of the second slot is aligned with an ending position of one symbol of the first slot, or starting boundaries of the first slot and the second slot within a subframe are aligned, or both the first slot and the second slot start from a boundary of a subframe.

Optionally, the sending the control signaling in the first time slot includes:

the control signaling is sent according to the appointed subcarrier interval at the OFDM symbol at the beginning of the first time slot; or,

when the starting positions of the first time slot and the second time slot are aligned, the OFDM symbol at the beginning of the first time slot adopts the OFDM symbol corresponding to the smaller subcarrier interval in the subcarrier intervals used by the first time slot and the second time slot to send the control signaling; or,

and when the starting positions of the first time slot and the second time slot are aligned, the control signaling is sent at the OFDM symbol at the beginning of the first time slot or the second time slot according to the appointed subcarrier interval.

Optionally, the sending the control signaling according to the agreed subcarrier spacing includes:

sending the control signaling according to the OFDM symbol corresponding to the minimum subcarrier interval in the subcarrier intervals supported by the system; or, when time slot time division multiplexing formed by OFDM symbols corresponding to different subcarrier intervals is allowed, the control signaling is sent for the OFDM symbol corresponding to the smallest subcarrier interval among the different subcarrier intervals according to the subcarrier interval.

Optionally, the control signaling includes: control signaling corresponding to a first time slot and control signaling corresponding to a second time slot;

the control signaling corresponding to the first time slot is used for indicating which OFDM symbols are used for transmitting and/or receiving service data in the OFDM symbols corresponding to the first subcarrier interval in the first time slot; or, indicating which OFDM symbols are not used for transmitting and/or receiving traffic data according to the OFDM symbols corresponding to the first subcarrier spacing in the first slot; or, indicating which OFDM symbols in the OFDM symbols corresponding to the first subcarrier interval in the first time slot are used for transmitting and/or receiving service data by using the OFDM symbols corresponding to the second subcarrier interval;

the control signaling corresponding to the second time slot is used for indicating the number of the symbols of the OFDM symbols corresponding to the second subcarrier interval in the second time slot, or the second time slot is according to the duration or the end position of the OFDM symbols corresponding to the second subcarrier interval.

Optionally, the control signaling corresponding to the second time slot and the control signaling corresponding to the first time slot are sent using the same subcarrier interval; wherein the same subcarrier spacing is a subcarrier spacing used for a second time slot.

Optionally, the ending position of the second time slot is located at a boundary of one OFDM symbol in the OFDM symbols corresponding to the first subcarrier interval.

Optionally, the information transmission method further includes: when the second time slot cannot be aligned to an OFDM symbol boundary in the OFDM symbols corresponding to the first subcarrier interval according to the appointed time length or the symbol number, the transmitting end configures and indicates the symbol number of the second time slot to be increased or decreased so as to be aligned to an OFDM symbol boundary in the OFDM symbols corresponding to the first subcarrier interval.

Optionally, the indicating, by the sending end, the number of symbols of the second timeslot to be increased or decreased includes: and the transmitting end indicates the number of the symbols of the second time slot to increase or decrease through bits in the control signaling.

Optionally, the control signaling includes: and subcarrier interval information used when the service data corresponding to the control signaling is transmitted and/or received.

Optionally, sending a control signaling in the first time slot includes: sending the control signaling before actually sending and/or receiving the OFDM symbols of the service data according to the OFDM symbols corresponding to the first subcarrier intervals in the first time slot;

wherein the OFDM symbol actually transmitting and/or receiving the traffic data includes: except for the OFDM symbols corresponding to the first subcarrier spacing in the first time slot, the OFDM symbols corresponding to the first subcarrier spacing in the portion are not used for transmitting and/or receiving the traffic data corresponding to the first subcarrier spacing, but are used for transmitting and/or receiving the traffic data according to the OFDM symbols corresponding to the second subcarrier spacing.

And the control signaling is sent according to the OFDM symbols corresponding to the second subcarrier interval.

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

a first receiving end receives a control signaling according to the position of a first time slot formed by Orthogonal Frequency Division Multiplexing (OFDM) symbols corresponding to a first subcarrier interval;

the first receiving end determines that OFDM symbols corresponding to part or all of first subcarrier intervals in the first time slot are used for sending or receiving service data according to the control signaling;

and the first receiving end sends or receives service data according to the OFDM symbols corresponding to the first subcarrier intervals.

Optionally, the determining, by the first receiving end according to the control signaling, that OFDM symbols corresponding to part or all of the first subcarrier intervals in the first time slot are used for sending or receiving service data includes:

and the first receiving end determines the OFDM symbols used for data transmission and/or reception according to the first subcarrier interval in the first time slot from the control signaling.

Optionally, the information transmission method further includes: the first receiving end determines the position of a first time slot formed by OFDM symbols corresponding to a first subcarrier interval in the following way:

Optionally, the receiving of the control signaling includes: receiving control signaling at an OFDM symbol at the beginning of the first slot.

Optionally, the control signaling includes subcarrier spacing information used when service data corresponding to the control signaling is transmitted and/or received.

Optionally, the control signaling is configured to indicate a symbol number of an OFDM symbol corresponding to a first subcarrier interval included in the first time slot, a duration of the first time slot, or an end position.

Optionally, the end position of the first time slot is located at an OFDM symbol boundary of an OFDM symbol corresponding to the reference subcarrier interval.

Optionally, the receiving of the control signaling includes: receiving a control signaling before actually transmitting and/or receiving an OFDM symbol of service data in the first time slot according to the OFDM symbol corresponding to the first subcarrier interval;

Optionally, the control signaling is received according to an OFDM symbol corresponding to the second subcarrier interval.

In a third aspect, an embodiment of the present invention further provides an information transmission method, including:

and the second receiving end receives the control signaling at the OFDM symbol at the beginning of the second time slot according to the position of the second time slot formed by the OFDM symbols corresponding to the second subcarrier interval, and transmits or receives the service data according to the OFDM symbols corresponding to the second subcarrier interval.

Optionally, the information transmission method further includes: the second receiving end determines the position of a second time slot formed by OFDM symbols corresponding to a second subcarrier interval by the following method:

Optionally, the control signaling indicates the number of symbols included in the second slot, the duration of the second slot, or the end position of the second slot.

Optionally, the receiving of the control signaling in the OFDM symbol at the beginning of the second slot includes: and receiving the control signaling at the beginning OFDM symbol of the second time slot according to the appointed subcarrier interval.

Optionally, the ending position of the second time slot is located at a reference subcarrier interval or one OFDM symbol boundary of an OFDM symbol corresponding to a subcarrier interval of a time division multiplexed subsequent time slot.

Optionally, the information transmission method further includes: and when the second time slot cannot be aligned to one OFDM symbol boundary of the OFDM symbol corresponding to the reference subcarrier interval or the subcarrier interval of the time division multiplexing time slot later according to the appointed time length or the symbol number, the second receiving end increases or decreases the symbol of the second time slot according to the indication of the sending end so as to be aligned to one OFDM symbol boundary of the OFDM symbol corresponding to the reference subcarrier interval or the subcarrier interval of the time division multiplexing time slot later.

Optionally, a bit in the control signaling can indicate to increase or decrease the symbol of the second slot.

In a fourth aspect, an embodiment of the present invention further provides an information transmission apparatus, which is applied to a sending end, where the information transmission apparatus includes:

a sending module, configured to send a control signaling in a first time slot according to a position of the first time slot formed by Orthogonal Frequency Division Multiplexing (OFDM) symbols corresponding to a first subcarrier interval;

a first transmission module, configured to send or receive service data according to the OFDM symbol corresponding to the first subcarrier interval;

the first transmission module allows a second time slot formed by OFDM symbols corresponding to a second subcarrier interval to be sent or received by using some or all of the OFDM symbols corresponding to the first subcarrier interval in the first time slot, and sends or receives service data according to the OFDM symbols corresponding to the second subcarrier interval;

Optionally, the information transmission apparatus further includes: a first processing module, configured to form a first time slot from the OFDM symbols corresponding to the first subcarrier interval according to an appointed number, and place the first time slot in the time direction according to a time length sequence of the first time slot; and forming a second time slot by the OFDM symbols corresponding to the second subcarrier interval according to the appointed number, and placing the second time slot in the time direction according to the time length sequence of the second time slot.

Optionally, the information transmission apparatus further includes: and an indicating module, configured to configure and indicate the number of symbols of the second time slot to be increased or decreased to align to an OFDM symbol boundary in the OFDM symbols corresponding to the first subcarrier interval when the second time slot cannot be aligned to an OFDM symbol boundary in the OFDM symbols corresponding to the first subcarrier interval according to an appointed time length or symbol number.

In a fifth aspect, an embodiment of the present invention further provides an information transmission apparatus, which is applied to a first receiving end, where the information transmission apparatus includes:

a first receiving module, configured to receive a control signaling according to a position of a first time slot formed by OFDM symbols corresponding to a first subcarrier interval;

a determining module, configured to determine, according to the control signaling, that OFDM symbols corresponding to some or all of the first subcarrier intervals in the first time slot are used for sending or receiving service data;

and the second transmission module is used for transmitting or receiving service data according to the OFDM symbols corresponding to the first subcarrier intervals.

Optionally, the determining module is configured to determine, from the control signaling, an OFDM symbol used for data transmission and/or reception in the first time slot according to the first subcarrier interval.

Optionally, the information transmission apparatus further includes: and a second processing module, configured to form a first time slot from the OFDM symbols corresponding to the first subcarrier interval according to the predetermined number, and place the first time slot in the time direction according to the time length sequence of the first time slot.

In a sixth aspect, an embodiment of the present invention further provides an information transmission apparatus, which is applied to a second receiving end, where the information transmission apparatus includes:

a second receiving module, configured to receive the control signaling at an OFDM symbol at the beginning of a second time slot according to a position of the second time slot formed by the OFDM symbols corresponding to the second subcarrier interval;

and a third transmission module, configured to send or receive service data according to the OFDM symbol corresponding to the second subcarrier interval.

Optionally, the information transmission apparatus further includes: and a third processing module, configured to form a second time slot from the OFDM symbols corresponding to the second subcarrier interval according to the predetermined number, and place the second time slot in the time direction according to the time length sequence of the second time slot.

Optionally, the information transmission apparatus further includes: and a fourth processing module, configured to, when the second time slot cannot be aligned to a reference subcarrier interval or one OFDM symbol boundary of an OFDM symbol corresponding to a subcarrier interval of a subsequent time division multiplexing time slot according to an agreed duration or symbol number, increase or decrease a symbol of the second time slot according to an instruction of the sending end, so as to align to the reference subcarrier interval or one OFDM symbol boundary of an OFDM symbol corresponding to a subcarrier interval of the subsequent time division multiplexing time slot.

In addition, an embodiment of the present application further provides a computer-readable storage medium, which stores computer-executable instructions, and when the computer-executable instructions are executed by a processor, the information transmission method of the first aspect is implemented.

Embodiments of the present application further provide a computer-readable storage medium, which stores computer-executable instructions, and when executed by a processor, the computer-executable instructions implement the information transmission method according to the second aspect.

Embodiments of the present application further provide a computer-readable storage medium, in which computer-executable instructions are stored, and when executed by a processor, the information transmission method according to the third aspect is implemented.

Compared with the related art, the embodiment of the invention comprises the following steps: a sending end sends a control signaling in a first time slot according to the position of the first time slot formed by the OFDM symbols corresponding to the first subcarrier interval, and sends or receives service data according to the OFDM symbols corresponding to the first subcarrier interval; the sending end allows a part or all of OFDM symbols corresponding to the first subcarrier intervals in the first time slot to be used for sending or receiving a second time slot formed by the OFDM symbols corresponding to the second subcarrier intervals, and sends or receives service data according to the OFDM symbols corresponding to the second subcarrier intervals; the second subcarrier interval is greater than the first subcarrier interval, or the duration of the first time slot is greater than the duration of the second time slot. The scheme of the embodiment of the invention determines the division of the time slots formed by the OFDM symbols of different subcarrier intervals and the corresponding control signaling sending mechanism thereof, so that the complexity of a terminal which uses different subcarrier intervals to send or receive service data is not increased during multiplexing, the multiplexed time slots have the same control signaling sending or receiving position, and the complexity of receiving the control signaling due to more positions caused by conventional multiplexing is avoided.

Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the application. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

The accompanying drawings are included to provide a further understanding of the claimed subject matter and are incorporated in and constitute a part of this specification, illustrate embodiments of the subject matter and together with the description serve to explain the principles of the subject matter and not to limit the subject matter.

Fig. 1 is a schematic diagram of multiplexing time slots formed by OFDM symbols of different subcarrier intervals in one subframe according to an embodiment of the present application;

fig. 2 is a first schematic diagram of an information transmission method according to an embodiment of the present application;

fig. 3 is a second schematic diagram of an information transmission method according to an embodiment of the present application;

fig. 4 is a third schematic diagram of an information transmission method according to an embodiment of the present application;

fig. 5 is a schematic diagram of timeslot division and multiplexing performed by taking subcarrier intervals of 15KHz and 30KHz as an example in the embodiment of the present application;

fig. 6 is a schematic diagram illustrating multiplexing of slots formed by OFDM symbols of different subcarrier intervals in one subframe according to an embodiment of the present application;

fig. 7 is a schematic diagram of a multiplexing case (case) of time slots corresponding to different subcarrier intervals in the embodiment of the present application;

fig. 8 is a first schematic diagram of an information transmission apparatus according to an embodiment of the present application;

fig. 9 is a second schematic diagram of an information transmission apparatus according to an embodiment of the present application;

fig. 10 is a third schematic diagram of an information transmission apparatus according to an embodiment of the present application.

Detailed Description

Hereinafter, embodiments of the present application will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

The steps illustrated in the flow charts of the figures may be performed in a computer system such as a set of computer-executable instructions. Also, while a logical order is shown in the flow diagrams, in some cases, the steps shown or described may be performed in an order different than here.

The problem of time alignment of OFDM symbols at different subcarrier intervals is currently discussed, for example, the time lengths of OFDM symbols at different SCS are different, and generally, the following relationship is considered to be satisfied between the subcarrier intervals and the symbol time lengths: assuming a reference subcarrier spacing of k KHz and a corresponding OFDM symbol duration of q milliseconds (ms), then for the subcarrier spacing is (2)ⁿX k) KHz OFDM symbol duration of q/2ⁿAnd ms and n are integers.

In scheduling, in order to avoid the interference problem caused by the fact that boundaries between OFDM symbols cannot be aligned, the time domain alignment of the OFDM symbols of different subcarrier intervals is required as much as possible.

When multiplexing is performed on the scheduling units corresponding to a plurality of different SCS, a corresponding multiplexing rule is designed, so that interference caused by misalignment of OFDM symbols is reduced as much as possible.

It should be noted that, the time slot mentioned in this application may also be referred to as a transmission unit or a scheduling unit; the scheduling period may also be referred to as a subframe or a transmission period. The time slot formed by the OFDM symbols corresponding to the reference subcarrier interval is called a reference time slot, and the subframe formed by the OFDM symbols corresponding to the reference subcarrier interval is called a reference subframe. The OFDM symbols within each slot have the same subcarrier spacing (SCS), and different slots allow for different SCS to be used.

In the present application, a slot formed by an OFDM symbol corresponding to a subcarrier interval, a slot corresponding to a subcarrier interval, and a slot corresponding to a subcarrier interval have the same meaning.

Referring to fig. 1, a schematic diagram of time division multiplexing between time slots formed by OFDM symbols of different subcarrier intervals is shown. The following description will be given by taking time division multiplexing of a time slot formed by OFDM symbols at intervals of 30KHz and a time slot formed by OFDM symbols at intervals of 15KHz as an example, and the multiplexing principle between time slots formed by OFDM symbols at intervals of other different subcarriers is similar, for example, multiplexing of a time slot formed by OFDM symbols at intervals of 15KHz and a time slot formed by OFDM symbols at intervals of 60 KHz; the time slot formed by the OFDM symbols of the sub-carrier interval of 30KHz is multiplexed with the time slot formed by the OFDM symbols of the sub-carrier interval of 60 KHz. The subcarrier spacing to which the present application relates may come from the following ranges: 3.75KHz, 7.5KHz, 15KHz, 30KHz, 60KHz, 120KHz, 240KHz, 480KHz, 75 KHz. The time slot multiplexing formed by the OFDM symbols of any two different subcarrier intervals can be supported, and the principle is the same. No further description is given. It should be noted that the present application is also suitable for time slot time division multiplexing of different subcarrier intervals in a subband of one carrier. For example, one carrier is divided into 2 sub-bands, and the scheme of the present application may also be adopted when time division multiplexing is performed between time slots formed by OFDM symbols of different sub-carrier intervals in each sub-band.

The embodiment of the present application provides a new subframe, which includes one or more slots:

time slots formed by OFDM symbols corresponding to different subcarrier intervals are placed in the time direction according to respective time length sequence. The start point of the slot is aligned to the start or end boundary of the reference subframe.

Time slot 1 and time slot 2 are respectively a time slot made up of subcarrier spacing 1 and a time slot made up of subcarrier spacing 2. Slot 3 is a slot made up of subcarrier spacings 3. Both subcarrier spacing 1 and subcarrier spacing 2 are greater than subcarrier spacing 3.

One slot 3 includes a plurality of full slots 1 and/or 2.

Each of the plurality of slots allows unequal numbers of symbols to be configured, Cyclic Prefixes (CPs) of symbols included in each of the plurality of slots allow unequal lengths to be configured, and subcarrier intervals of symbols in each of the plurality of slots allow unequal configurations. The number of slots contained in each subframe allows for unequal configuration.

Alternatively, the subframe provided in the embodiment of the present application may be described as:

the starting position of the different subcarrier spacing slots is aligned with the reference subframe starting or ending boundaries.

And when the scaled subcarrier interval is larger than the reference subcarrier interval, aligning the time slots according to the starting or ending boundary of the time slots. The slot of the symbol with the larger CP is aligned to the beginning or ending boundary of the reference subframe or slot.

And when the scaled subcarrier spacing is smaller than the reference subcarrier spacing, aligning the time slot to the starting or ending boundary of the reference subframe or the time slot. The slot of the symbol with the larger CP is aligned to the beginning or ending boundary of the reference slot.

and aligning the time slots corresponding to each subcarrier interval to the boundary of the reference subframe.

And the time slots corresponding to the intervals of each subcarrier are placed according to respective duration and positions.

When time division multiplexing is carried out, only after the time slot corresponding to the previous subcarrier interval is transmitted according to the time length and the position of the time slot, the time slot corresponding to the other subcarrier interval can be determined to be transmitted at the beginning of a certain time slot according to the time length and the position of the time slot.

For example, fig. 1 shows a subframe consisting of time slots formed by a plurality of different SCS. As in fig. 1, a subframe may include a slot made up of OFDM symbols with SCS of 30KHz, a slot made up of OFDM symbols with SCS of 60KHz, and a slot made up of OFDM symbols with SCS of 15 KHz. Wherein the reference subcarrier interval is 15KHz, and each slot includes 7 OFDM symbols.

The method and the device have the advantages that the multiplexing mode of the time slots formed by the OFDM symbols with different subcarrier intervals in the same subframe is provided, the division of the time slots formed by the OFDM symbols with different subcarrier intervals and the corresponding control signaling sending mechanism are clear, the complexity of UE (user equipment) which sends or receives service data by using different subcarrier intervals is not increased during multiplexing, the multiplexed time slots have the same control signaling sending and/or receiving positions, and the complexity of receiving the control signaling due to more positions caused by conventional multiplexing is avoided.

As shown in fig. 2, the present embodiment provides an information transmission method, including:

a sending end sends a control signaling in a first time slot according to the position of the first time slot formed by the OFDM symbols corresponding to the first subcarrier interval, and sends or receives service data according to the OFDM symbols corresponding to the first subcarrier interval;

the sending end allows a part or all of OFDM symbols corresponding to the first subcarrier intervals in the first time slot to be used for sending or receiving a second time slot formed by the OFDM symbols corresponding to the second subcarrier intervals, and sends or receives service data according to the OFDM symbols corresponding to the second subcarrier intervals;

In this embodiment, the sending end includes a base station or a transmission node end. The base station can perform time division multiplexing according to the requirements of transmission services, such as time slots of URLLC and eMBB, the subcarrier spacing requirements of these services are different, and the base station performs data transmission by scheduling the time slots corresponding to the two services according to the time division of the transmission requirements.

The information transmission method of this embodiment may further include: the transmitting end determines the position of the first time slot by the following method:

and forming a first time slot by the OFDM symbols corresponding to the first subcarrier interval according to the appointed number, and placing the first time slot in the time direction according to the time length sequence of the first time slot.

The information transmission method of this embodiment may further include: the transmitting end determines the position of the second time slot by the following method:

Optionally, starting boundaries of the first slot and the second slot are aligned, or a starting position of the second slot is aligned with a starting boundary of one symbol of the first slot, or an ending position of the second slot is aligned with an ending position of one symbol of the first slot, or starting boundaries of the first slot and the second slot within the subframe are aligned, or both the first slot and the second slot start from a boundary of the subframe.

Wherein, sending the control signaling in the first time slot may include:

sending a control signaling according to an appointed subcarrier interval at an OFDM symbol at the beginning of a first time slot; or,

when the initial positions of the first time slot and the second time slot are aligned, the OFDM symbol at the beginning of the first time slot adopts the OFDM symbol corresponding to the smaller subcarrier interval in the subcarrier intervals used by the first time slot and the second time slot to send the control signaling; or,

Wherein, the sending the control signaling according to the agreed subcarrier spacing may include:

The control signaling may include: control signaling corresponding to a first time slot and control signaling corresponding to a second time slot;

the control signaling corresponding to the first time slot may be used to indicate which OFDM symbols are used for transmitting and/or receiving traffic data in the OFDM symbols corresponding to the first subcarrier interval in the first time slot; or, indicating which OFDM symbols are not used for transmitting and/or receiving traffic data according to the OFDM symbols corresponding to the first subcarrier spacing in the first slot; or, indicating which OFDM symbols in the OFDM symbols corresponding to the first subcarrier interval in the first time slot are used for transmitting and/or receiving service data by using the OFDM symbols corresponding to the second subcarrier interval;

the control signaling corresponding to the second time slot may be used to indicate the number of symbols of the OFDM symbol corresponding to the second subcarrier interval in the second time slot, or the second time slot may be according to the duration or the end position of the OFDM symbol corresponding to the second subcarrier interval.

The control signaling corresponding to the second time slot and the control signaling corresponding to the first time slot can be sent by using the same subcarrier interval; wherein the same subcarrier spacing is a subcarrier spacing used for a second time slot.

The end position of the second slot may be located at one OFDM symbol boundary in the OFDM symbols corresponding to the first subcarrier spacing. The information transmission method may further include: when the second time slot cannot be aligned to an OFDM symbol boundary in the OFDM symbols corresponding to the first subcarrier interval according to the appointed time length or the symbol number, the transmitting end can configure and indicate the symbol number of the second time slot to be increased or decreased so as to be aligned to an OFDM symbol boundary in the OFDM symbols corresponding to the first subcarrier interval. The sending end may indicate that the number of symbols of the second timeslot is increased or decreased, and may include: the transmitting end can indicate the number of symbols of the second time slot to increase or decrease through bits in control signaling.

The control signaling may include: and subcarrier interval information used when the service data corresponding to the control signaling is transmitted and/or received.

Transmitting control signaling in the first time slot may include: sending the control signaling before actually sending and/or receiving the OFDM symbols of the service data according to the OFDM symbols corresponding to the first subcarrier intervals in the first time slot;

wherein the OFDM symbol actually transmitting and/or receiving the traffic data includes: except for the OFDM symbols corresponding to a part of the first subcarrier intervals in the first time slot, the OFDM symbols corresponding to the part of the first subcarrier intervals are not used for transmitting and/or receiving the traffic data corresponding to the first subcarrier intervals, but are used for transmitting and/or receiving the traffic data according to the OFDM symbols corresponding to the second subcarrier intervals. The control signaling may be transmitted according to an OFDM symbol corresponding to a second subcarrier interval.

As shown in fig. 3, the present embodiment further provides an information transmission method, including:

a first receiving end receives a control signaling according to the position of a first time slot formed by OFDM symbols corresponding to a first subcarrier interval;

and the first receiving end transmits or receives service data according to the OFDM symbols corresponding to the first subcarrier intervals.

In this embodiment, the first receiving end is configured to receive or transmit data of a first slot formed by OFDM symbols corresponding to the first subcarrier interval.

The determining, by the first receiving end, that the OFDM symbols corresponding to part or all of the first subcarrier intervals in the first time slot are used for sending or receiving service data according to the control signaling may include:

The information transmission method may further include: the first receiving end determines the position of a first time slot formed by OFDM symbols corresponding to a first subcarrier interval in the following way:

The receiving of the control signaling may include: receiving control signaling at an OFDM symbol at the beginning of the first slot. Optionally, the OFDM symbol at the beginning of the first slot is received at the agreed subcarrier spacing.

The control signaling may include subcarrier spacing information used when service data corresponding to the control signaling is transmitted and/or received.

The control signaling may be used to indicate a symbol number of an OFDM symbol corresponding to a first subcarrier interval included in the first time slot, a duration of the first time slot, or an end position.

The end position of the first slot may be located at one OFDM symbol boundary of an OFDM symbol corresponding to a reference subcarrier spacing.

The receiving of the control signaling may include: receiving a control signaling before actually transmitting and/or receiving an OFDM symbol of service data in the first time slot according to the OFDM symbol corresponding to the first subcarrier interval;

wherein the OFDM symbol actually transmitting and/or receiving the traffic data includes: except for the OFDM symbols corresponding to a part of the first subcarrier intervals in the first time slot, the OFDM symbols corresponding to the part of the first subcarrier intervals are not used for transmitting and/or receiving the traffic data corresponding to the first subcarrier intervals, but are used for transmitting and/or receiving the traffic data according to the OFDM symbols corresponding to the second subcarrier intervals. The control signaling may be received according to an OFDM symbol corresponding to a second subcarrier interval.

As shown in fig. 4, the present embodiment provides an information transmission method, including:

In this embodiment, the second receiving end is configured to receive or transmit data of the second slot formed by the OFDM symbols corresponding to the second subcarrier interval.

The information transmission method may further include: the second receiving end determines the position of a second time slot formed by OFDM symbols corresponding to a second subcarrier interval by the following method:

The control signaling may indicate the number of symbols included in the second slot, the duration of the second slot, or the end position of the second slot.

The receiving of the control signaling in the OFDM symbol at the beginning of the second slot may include: and receiving the control signaling at the beginning OFDM symbol of the second time slot according to the appointed subcarrier interval.

The end position of the second time slot may be located at one OFDM symbol boundary of an OFDM symbol corresponding to the reference subcarrier spacing or a subcarrier spacing of a subsequent time division multiplexed time slot.

The information transmission method may further include: and when the second time slot cannot be aligned to one OFDM symbol boundary of the OFDM symbol corresponding to the reference subcarrier interval or the subcarrier interval of the time division multiplexing time slot later according to the appointed time length or the symbol number, the second receiving end increases or decreases the symbol of the second time slot according to the indication of the sending end so as to be aligned to one OFDM symbol boundary of the OFDM symbol corresponding to the reference subcarrier interval or the subcarrier interval of the time division multiplexing time slot later. Wherein a bit in the control signaling can indicate whether to increase or decrease a symbol of the second slot.

In the embodiment of the application, the time slots formed by the OFDM symbols of different subcarrier intervals are sequentially arranged in the time direction. In time division multiplexing of a plurality of different time slots, some or all of the symbols in a time slot having a large duration (i.e., a small subcarrier spacing) are used for a time slot having a small duration (i.e., a large subcarrier spacing) to transmit and/or receive data. The start positions of the two slots are aligned. When the shorter time slot is plural, the control signaling of at least the larger time slot is transmitted at the start position of the present time slot. The control signaling describes which symbols in the time slot are used for actually transmitting and/or receiving data according to the subcarrier spacing of the time slot, or describes which symbols in the time slot are used for time slots formed by OFDM symbols of other subcarrier spacings. And the control signaling is sent by adopting OFDM symbols corresponding to fixed subcarrier intervals. The control signaling includes the subcarrier spacing used by the corresponding time slot.

As shown in fig. 5, the embodiment of the present application provides three time slot division and time division multiplexing modes.

Time slots consisting of 15KHz subcarrier-spaced OFDM symbols and time slots consisting of 30KHz subcarrier-spaced OFDM symbols are time division multiplexed as an example. The same approach may be used for slot multiplexing of other different subcarrier spacings. For example, the difference between the time slot formed by OFDM symbols at 15KHz subcarrier intervals and the time slot formed by OFDM symbols at 60KHz subcarrier intervals, and the time slot formed by OFDM symbols at 15KHz subcarrier intervals and the time slot formed by OFDM symbols at 30KHz subcarrier intervals can be described as follows: in the manner 1 in fig. 5, there is no difference; in the manner 2 in fig. 5, the difference is that: the number of symbols of a slot made up of OFDM symbols at 60KHz subcarrier spacing may be increased by 1 or 2 or 3. Since the OFDM symbol duration of one 15KHz subcarrier spacing is equal to the OFDM symbol duration of 4 60KHz subcarrier spacings, the number of slot symbols formed by OFDM symbols of a 60KHz subcarrier spacing may be increased by 1 or 2 or 3 (a positive integer less than 4). That is, when a slot made up of OFDM symbols spaced by N KHz subcarriers is multiplexed after a slot made up of OFDM symbols spaced by M KHz subcarriers, the number of symbols that may be added to the previous slot is: is less thanIs a positive integer of (a) to (b),indicating a rounding down. N is greater than or equal to M.

The following is a detailed description of several embodiments.

Example one

Fig. 5 schematically shows the sequential position of a slot formed by OFDM symbols corresponding to subcarrier spacings of 15KHz and the sequential position of a slot formed by OFDM symbols corresponding to subcarrier spacings of 30 KHz. When the time slots of the two different subcarrier spacings are multiplexed, the processing can be performed in the following manner.

A slot a (i.e., the aforementioned first slot) corresponding to a subcarrier spacing of 15KHz always constitutes a slot in terms of OFDM symbols corresponding to a subcarrier spacing of 15KHz, for example, 7 OFDM symbols constitute a slot, and the position of the slot is fixed as shown in fig. 5, for example, the slot always starts from a subframe boundary. When a sub-frame comprises a plurality of time slots formed by OFDM symbols corresponding to sub-carrier intervals of 15KHz, the first time slot starts from the boundary of the sub-frame, and the last time slot ends at the boundary of the sub-frame.

A slot B (i.e., the aforementioned second slot) corresponding to a subcarrier spacing of 30KHz always constitutes a slot in terms of OFDM symbols corresponding to a subcarrier spacing of 30KHz, for example, 7 OFDM symbols constitute a slot, and the position of the slot is fixed as shown in fig. 5, for example, the slot always starts from a subframe boundary. When a sub-frame comprises a plurality of time slots formed by OFDM symbols corresponding to sub-carrier intervals of 30KHz, the first time slot starts from the boundary of the sub-frame, and the last time slot ends at the boundary of the sub-frame.

In time division multiplexing of time slots of different subcarrier spacings (SCSs), when two time slots are sequentially placed in a given scheduling period according to respective OFDM symbol durations, if an unused duration exists between the two time slots, the duration is quantized into an OFDM symbol according to the SCS of the previous time slot and counted in the previous time slot. This generally occurs in order to align the ending position of a certain time slot to the ending position of another time slot or a certain OFDM symbol boundary, so as to reduce interference caused by symbol misalignment, and thus, the symbols of some time slots may be dynamically adjusted, and the base station should flexibly indicate the final number of symbols of the adjusted time slots according to the specific adjustment, for example, notify the terminal (UE) through Physical layer signaling (such as Physical Downlink Control Channel (PDCCH), Downlink Control signaling, etc.) or Radio Resource Control (RRC) message in high layer signaling.

Or, when a time slot (denoted as a next time slot) composed of OFDM symbols with subcarrier spacing M is multiplexed after a time slot (denoted as a previous time slot) composed of OFDM symbols with subcarrier spacing N, the end position of the previous time slot is the start position of an OFDM symbol sequentially placed in a given scheduling period by the OFDM symbols with subcarrier spacing M, or the start position of the next time slot is the start position of an OFDM symbol sequentially placed in the given scheduling period by the OFDM symbols with subcarrier spacing M, and the time length before the start position of the next time slot is counted in the previous time slot. Wherein N is greater than or equal to M.

For example, in the mode 2 shown in fig. 5, a 15KHz SCS slot and a 30KHz slot are time-division multiplexed, where the 30KHz and 15KHz slots start from the boundary of the scheduling cycle, are sequentially placed in the scheduling cycle according to the OFDM symbol duration corresponding to the 30KHz, and the first 8 symbols (assuming that the default slot is 7 OFDM symbols and the slot is 8 symbols) are truncated as one slot (where the 8 symbols are transmitted using a part of the 15KHz OFDM symbols, and one symbol is added to align the end of the 30KHz slot to the 15KHz OFDM symbol boundary (or slot boundary). And then the base station sends the service data with 15KHz SCS by using the OFDM symbols remained in the slot with 15KHz SCS, at this time, the number of the OFDM symbols contained in the slot can be changed, and the base station needs to indicate the number of the symbols or the end position included in the slot for the UE through signaling.

The principle is the same when time slots of other different SCS are time-division multiplexed, and the description is omitted here.

Example two

Fig. 5 shows the sequential position of a slot formed by OFDM symbols corresponding to subcarrier spacing of 15KHz and the sequential position of a slot formed by OFDM symbols corresponding to subcarrier spacing of 30 KHz. When the time slots of the two different subcarrier spacings are multiplexed, the processing can be performed in the following manner.

A slot a (i.e., the aforementioned first slot) corresponding to a subcarrier spacing of 15KHz always constitutes a slot in terms of OFDM symbols corresponding to a subcarrier spacing of 15KHz, for example, 7 OFDM symbols constitute a slot, and the position of the slot is fixed as shown in fig. 5, for example, the slot always starts from a subframe boundary. When a sub-frame comprises a plurality of time slots formed by OFDM symbols corresponding to the sub-carriers of 15KHz, the first time slot starts from the boundary of the sub-frame, and the last time slot ends at the boundary of the sub-frame.

A slot B (i.e., the aforementioned second slot) corresponding to a subcarrier spacing of 30KHz always constitutes a slot in terms of OFDM symbols corresponding to a subcarrier spacing of 30KHz, for example, 7 OFDM symbols constitute a slot, and the position of the slot is fixed as shown in fig. 5, for example, the slot always starts from a subframe boundary. When a sub-frame comprises a plurality of time slots formed by OFDM symbols corresponding to 30KHz sub-carriers, the first time slot starts from the boundary of the sub-frame, and the last time slot ends at the boundary of the sub-frame.

The same process is also applied to slots formed by OFDM symbols corresponding to other subcarrier intervals.

Slots formed by OFDM symbols corresponding to different subcarrier spacings are all started from the subframe boundary, and as in pattern 1 of fig. 5, slot a formed by OFDM symbols at a 15KHz subcarrier spacing and slot B formed by OFDM symbols at a 30KHz subcarrier spacing are all started from the subframe boundary. However, the OFDM with 15KHz spacing between the first 4 subcarriers of the slot a is not used for transmitting and/or receiving data with 15KHz subcarrier spacing, but the time duration corresponding to the OFDM symbol with the first 3.5 15KHz subcarrier spacing in the slot a is changed to the OFDM symbol with 30KHz subcarrier spacing, and constitutes the slot B, which is used for transmitting and/or receiving data with 30KHz subcarrier spacing. Traffic of a 15KHz subcarrier interval is transmitted and/or received from the 5 th OFDM symbol of the slot a. Wherein, the OFDM symbol duration corresponding to half 15KHz subcarrier interval is wasted.

In mode 1 of fig. 5, the control signaling for both slot a and slot B is sent at the beginning of slot a (or slot B, where the beginning of slots a and B are aligned). Optionally, the control signaling is sent using a predetermined subcarrier interval, or sent using a subcarrier interval with a smaller subcarrier interval in the multiplexing time slot.

The first receiving end (UE transmitting data using 15KHz subcarrier spacing) receives control signaling (i.e., control signaling for slot a) at the start position of slot a, the control signaling instructing the first receiving end to: which OFDM symbols in slot a are used to actually transmit and/or receive data corresponding to the 15KHz subcarrier spacing. E.g., starting with the 5 th OFDM symbol. When it is unclear by the first receiving end what subcarrier spacing data is transmitted and/or received, the subcarrier spacing at which data is actually transmitted and/or received may be further indicated in the control signaling. That is, for the first receiving end, the position of receiving the control signaling is fixed, at the beginning of each 15KHz slot, but the symbol position of the actual valid data transmission and/or reception does not necessarily start from the beginning of the slot, but may start from some OFDM symbol in the middle of the slot. The control signaling may inform the first receiving end of the symbol position where the data is actually transmitted and/or received, and further may inform the first receiving end of the subcarrier spacing used for actually transmitting and/or receiving the data. When the actual data in the slot a starts directly from the specified position, the control signaling may not include the symbol position information of the actual transmission data.

The second receiving end (UE transmitting data using 30KHz subcarrier spacing) receives the control signaling (i.e. the control signaling of timeslot B) at the start position of timeslot B, and the control signaling informs the second receiving end to start corresponding data reception from the default symbol position, for example, start data transmission and/or reception after the control signaling. Slot B contains a default number of OFDM symbols, e.g. 7. The control signaling may be sent using OFDM symbols corresponding to the 30KHz subcarrier spacing.

EXAMPLE III

Slots formed by OFDM symbols corresponding to different subcarrier spacings start from a subframe boundary, and as in pattern 2 of fig. 5, slot a formed by OFDM symbols at a 15KHz subcarrier spacing and slot B formed by OFDM symbols at a 30KHz subcarrier spacing start from a subframe boundary. However, the OFDM with 15KHz spacing between the first 4 subcarriers of the slot a is not used for transmitting and/or receiving data with 15KHz subcarrier spacing, but the time duration corresponding to the OFDM symbol with 15KHz subcarrier spacing in the slot a is changed to the OFDM symbol corresponding to the 30KHz subcarrier, and constitutes the slot B, which is used for transmitting and/or receiving data with 30KHz subcarrier spacing. Data of a 30KHz subcarrier interval is transmitted and/or received from the 5 th OFDM symbol of the slot a. The above process increases the number of symbols of the slot B from 7 (7 symbols may be the default number of symbols) to 8, mainly in order to align the end position of the slot B to a certain symbol boundary of the slot a to reduce interference, so that the number of symbols of the slot B can be dynamically adjusted.

In mode 2 (or mode 1) of fig. 5, the control signaling of both slot a and slot B is transmitted at the start position of slot a (or slot B, the start positions of slot a and slot B being aligned). Optionally, the control signaling of the time slot a and the time slot B is sent by using a predetermined subcarrier interval, or is sent by using a subcarrier interval with a smaller subcarrier interval in a multiplexing time slot.

The first receiving end (UE transmitting data using 15KHz subcarrier spacing) receives control signaling (i.e., control signaling for slot a) at the beginning of slot a, the control signaling instructing the receiving end to: which OFDM symbols in slot a are used to actually transmit and/or receive data corresponding to the 15KHz subcarrier spacing. E.g., starting with the 5 th OFDM symbol. When it is unclear by the first receiving end what subcarrier spacing data is transmitted and/or received, the subcarrier spacing at which data is actually transmitted and/or received may be further indicated in the control signaling. That is, for the first receiving end, the position of receiving the control signaling is fixed, at the beginning of each 15KHz slot, but the symbol position of the actual valid data transmission and/or reception does not necessarily start from the beginning of the slot, but may start from some OFDM symbol in the middle of the slot. The control signaling may inform the symbol position of the actually transmitted and/or received data, and further may inform the first receiving end of the subcarrier spacing used for actually transmitting and/or receiving data. When the actual data in the slot a starts directly from the specified position, the control signaling may not include the symbol position information of the actual transmission data.

The second receiving end (UE transmitting data using 30KHz subcarrier spacing) receives control signaling (i.e., control signaling for slot B) at the start position of slot B, and the control signaling may be transmitted using OFDM symbols corresponding to the 30KHz subcarrier spacing. The control signaling informs the second receiving end of the number of symbols, the time length of the time slot or the end position of the time slot contained in the time slot B. As in mode 2 of fig. 5, the control signaling may inform the second receiving end that slot B is formed by OFDM symbols corresponding to 8 30KHz subcarrier intervals. That is, at this time, the slot B is increased by one (shaded OFDM symbol in pattern 2 of fig. 5) from the default 7 OFDM symbols. Thus, compared to the mode 1 of fig. 5, resource waste is avoided.

Example four

Slots formed by OFDM symbols corresponding to different subcarrier spacings are all started from the subframe boundary, and as in pattern 3 of fig. 5, slot a formed by OFDM symbols at a 15KHz subcarrier spacing and slot B formed by OFDM symbols at a 30KHz subcarrier spacing are all started from the subframe boundary. However, the duration corresponding to the OFDM with 15KHz spacing between the first 3.5 subcarriers of the time slot a is not used for transmitting and/or receiving data with 15KHz subcarrier spacing, but the OFDM symbols with the first 3.5 15KHz subcarrier spacing in the time slot a are changed into OFDM symbols corresponding to 30KHz subcarriers and constitute a time slot B, and the time slot B is used for transmitting and/or receiving data with 30KHz subcarrier spacing. Data of a 15KHz subcarrier interval is transmitted and/or received from the middle of the 4 th OFDM symbol of the slot a. In which the symbol of the shaded portion in pattern 3 of fig. 5 is taken as a starting point of actual transmission and/or reception data of the slot a.

In mode 3 of fig. 5, the control signaling for both slot a and slot B is sent at the beginning of slot a (or slot B, where the beginning of slots a and B are aligned). Optionally, the control signaling of the time slot a and the time slot B is sent by using a predetermined subcarrier interval, or is sent by using a subcarrier interval with a smaller subcarrier interval in a multiplexing time slot.

The first receiving end (UE transmitting data using 15KHz subcarrier spacing) receives control signaling (i.e., control signaling for slot a) at the start position of slot a, the control signaling instructing the first receiving end to: which OFDM symbols in slot a are used to actually transmit and/or receive data corresponding to the 15KHz subcarrier spacing. E.g., starting in the middle of the 4 th OFDM symbol. When it is unclear by the first receiving end what subcarrier spacing data is transmitted and/or received, the subcarrier spacing at which data is actually transmitted and/or received may be further indicated in the control signaling. That is, for the first receiving end, the location at which the first control signaling is received is fixed, at the beginning of each 15KHz slot, but the symbol location for actual valid data transmission and/or reception does not necessarily start at the beginning of the slot, but may start at some OFDM symbol in the middle of the slot. The control signaling may inform the symbol position of the actually transmitted and/or received data, and further may inform the first receiving end of the subcarrier spacing used for actually transmitting and/or receiving data.

EXAMPLE five

In the fourth embodiment, the control signaling of the slot a may be placed in the shaded OFDM symbol in fig. 5 to start transmitting.

In embodiments two and three, the control signaling for slot a may be placed to be transmitted in the OFDM symbol in slot a where the actual transmission and/or reception of data begins.

For other descriptions of this embodiment, reference may be made to embodiments two, three, and four.

EXAMPLE six

The present embodiment provides a new timeslot division and its corresponding usage rules.

The time slot duration is determined as the time slot duration corresponding to the reference subcarrier interval. For example, if the reference subcarrier spacing is 15KHz, the corresponding duration is 0.5 ms. So that the length of the slot will be 0.5 ms.

When the reference subcarrier spacing is 15KHz, the duration of a subframe is 1ms (corresponding to 14 OFDM symbols with subcarrier spacing of 15 KHz), and one subframe contains 2 slots of 0.5ms (corresponding to 7 OFDM symbols with subcarrier spacing of 15 KHz).

In the reference time slot, allowing OFDM symbols corresponding to different subcarrier intervals to be transmitted, wherein the transmission modes include the following two types:

mode A: in the system, only the definition of the reference subframe and the reference time slot is provided, and the specific transmission is carried out according to the number of symbols of the OFDM symbols corresponding to the designated subcarrier interval. For example, within one reference time slot, data transmission is allowed according to the OFDM symbols corresponding to the non-reference subcarrier spacing, for example, according to the OFDM symbols corresponding to the 30KHz and 60KHz subcarrier spacing, a part of or all the original OFDM symbols divided by the 15KHz reference subcarrier spacing are divided again. The OFDM symbols of the integer corresponding to the reference subcarrier spacing are always divided into OFDM symbols corresponding to other subcarrier spacings. At this time, data is transmitted according to the number of the newly divided OFDM symbols, for example, 7 OFDM symbols are required for this transmission, and then the base station configures 7 OFDM symbols for data transmission. Further, the base station may configure the subcarrier interval correspondingly used for the transmission. Further, the base station may configure the actual data start position (e.g., from which symbol the transmission starts) of the transmission. For example, in the reference time slot, the base station may convert the OFDM symbols corresponding to 2 15KHz subcarrier intervals into OFDM symbols corresponding to 60KHz subcarrier intervals for data transmission, where the 2 symbols may be the first 2, or some middle 2, or the last 2 in the reference time slot. The base station needs to indicate in the control signaling specifically which 2 symbols are converted into other subcarrier intervals for data transmission.

In the method a, only the reference time slot is defined, and the time slots corresponding to other subcarrier intervals are not specifically defined, and the data transmission is scheduled according to the number of OFDM symbols. I.e. how many symbols the base station needs to schedule, the base station indicates as required. To simplify signaling, the number of sets of the number of symbols scheduled by the base station may be limited, so that signaling is reduced. For example, the number of symbols corresponding to each subcarrier interval is limited to be scheduled for transmission according to only several kinds of symbol data.

When scheduling data transmission according to the symbol data, one transmission cannot span 2 reference slots. For example, one transmission should end at a reference slot and then another transmission again in the next reference slot. Thus, each transmission is limited in the reference time slot, and the cooperative silencing of the adjacent cells is facilitated based on the reference time slot.

Mode B: the system has a reference subframe and a reference time slot, and a scheduling unit formed by OFDM symbols corresponding to other subcarrier intervals can also be called a non-reference time slot. The reference and non-reference time slots are allowed to overlap, e.g., a portion of the symbols of the reference time slot are used for the non-reference time slot (where transmission is in accordance with the non-reference subcarrier spacing) or a portion of the symbols of the non-reference time slot are used for the reference time slot (where transmission is in accordance with the reference subcarrier spacing).

The non-reference slots may be aligned with the start of the reference slots or the non-reference slots may be misaligned with the start of the reference slots, e.g., using the middle partial OFDM symbol in the reference slot, or vice versa.

Regardless of which slot is described above, there is a default or defined number of symbols (or set of possible symbol numbers), e.g., the defined slot contains 7 symbols, and the base station can dynamically adjust the number of symbols for the slot for non-reference slots. For example, in a reference slot, the base station transmits data using a slot in which 2 OFDM symbols are converted into 60KHz subcarrier spacing, and then this slot should contain 7 60KHz OFDM symbols, but since the OFDM symbols of the 60KHz SCS are scaled from the OFDM symbols of the 15KHz SCS, the OFDM symbol duration of the 1 15KHz SCS is equal to the sum of the durations of the 4 OFDM symbols of the 60KHz SCS. Then, at this time, if the slot includes 7 OFDM symbols of 60KHz SCS, one OFDM symbol of 60KHz SCS would be wasted, and at this time, the base station continues to transmit OFDM symbols of 15KHz SCS because OFDM symbols of 60KHz SCS are not continuously transmitted any more, in order to ensure that the slot of 60KHz SCS is aligned with OFDM symbols of 15KHz SCS transmitted later in the reference slot, and at this time, the base station should start to transmit OFDM symbols of 15KHz SCS from the OFDM symbol boundary corresponding to 15KHz SCS in the reference slot, so as to avoid interference caused by symbol misalignment. Then one 60KHz SCS OFDM symbol is wasted at this time, and to avoid this, the base station can signal to the UE that the slot formed by the current 60KHz SCS OFDM symbol is 8 symbols instead of 7. That is, the base station can send signaling to the UE indicating the number of symbols contained in the slot.

EXAMPLE seven

Refer to fig. 1 and 6.

The time slot formed by the OFDM symbols corresponding to the reference subcarrier interval is called a reference time slot, and the subframe formed by the OFDM symbols corresponding to the reference subcarrier interval is called a reference subframe. A time slot is also called a scheduling unit or a transmission unit.

Time slot 1 and time slot 2 (which may be more time slots consisting of different subcarrier spacings) are respectively a time slot consisting of subcarrier spacing 1 and a time slot consisting of subcarrier spacing 2. Slot 3 is a slot made up of subcarrier spacings 3. Both subcarrier spacing 1 and subcarrier spacing 2 are greater than subcarrier spacing 3.

One slot 3 includes a plurality of full slots 1 and/or 2.

Or may be described as:

And when the scaled subcarrier interval is larger than the reference subcarrier interval, aligning the time slots according to the starting or ending boundary of the time slots. A slot having a symbol with a large Cyclic Prefix (CP) is aligned to a start or end boundary of a reference subframe or slot.

Or may be described as:

and time slots formed by OFDM symbols corresponding to each subcarrier interval are aligned to the boundary of the reference subframe.

And time slots formed by OFDM symbols corresponding to each subcarrier interval are placed according to respective duration and position.

When time division multiplexing is carried out, after the time slot formed by the OFDM symbols corresponding to the previous subcarrier interval is transmitted according to the time length and the position of the time slot, the time slot formed by the OFDM symbols corresponding to the other subcarrier interval can be transmitted at the beginning of a certain time slot determined in the time slot placed according to the time length and the position of the time slot. At this time, the start position of the following slot may be the same as the end position of the previous slot or separated by a certain time period. Alternatively, the description may not be performed according to the time slot, and particularly, the following time slot may not be described as the time slot. When (time division) multiplexing is performed, after the transmission unit formed by the OFDM symbols corresponding to the previous subcarrier interval is transmitted according to the time length and position of the transmission unit, the transmission unit formed by the OFDM symbols corresponding to another subcarrier interval can determine the start of a certain transmission unit in the transmission units placed according to the time length and position of the transmission unit to perform transmission. The transmission unit is composed of a number of OFDM symbols.

Example eight

Referring to fig. 7, the present embodiment further provides a rule of slot (slot) division and a method of using multiplexing.

In the time slot formed by the symbols corresponding to the plurality of different subcarrier intervals, the different subcarrier intervals are generally used for different service type transmission, for example, URLLC service is generally transmitted by using the time slot corresponding to the larger subcarrier interval and is bursty service. The eMBB traffic may be transmitted using a subcarrier spacing of 30KHz or 15KHz at a corresponding time slot. The time slots corresponding to different subcarrier intervals are bound to be multiplexed for transmission, and a plurality of time slot division multiplexing transmission modes are provided below, and have advantages and disadvantages in the aspects of complexity, scheduling flexibility and resource waste.

In case (case)1 and case2 of fig. 7, the position and multiplexing manner of the time slot determined by the base station are: a plurality of complete time slots with the same subcarrier spacing (i.e. the OFDM symbols included in the time slot are OFDM symbols corresponding to the same subcarrier spacing, it should be noted that when the control signaling of the time slot is sent at the start position of the time slot, it is allowed to use other subcarrier spacings to send, but the subcarrier spacing of the OFDM symbol transmitting the data of the time slot in the time slot is the same), and the time slots are time-division multiplexed in one reference subframe according to the time slot grid pattern and position in the time direction respectively. The boundary of a certain slot is aligned with the subframe boundary. This kind of case is easy to implement, but the scheduling flexibility is very low, and is not suitable for the transmission of the bursty traffic URLLC. For example, after a URLLC service suddenly arrives, it needs to wait until the end of other timeslots before being transmitted. If no corresponding service is sent in other time slots at this time, the URLLC service cannot be scheduled immediately, so that there is a potential waste of resources.

In case3 of fig. 7, the position and multiplexing mode of the time slot determined by the base station are: a plurality of complete time slots with different subcarrier spacing are time-division multiplexed within a reference subframe according to respective time slot grid patterns and positions. The boundary of a certain slot is aligned with the subframe boundary. The plurality of time slots with different subcarrier spacings are not allowed to be multiplexed in a nested or overlapping (or partially overlapping) manner. The scheduling flexibility of the case3 is slightly improved with respect to the cases 1 and 2, and is easy to implement. However, in case3, there is still a potential waste of resources for the same reasons as in case1 and case 2.

In case4 of fig. 7, the position and multiplexing mode of the time slot determined by the base station are: a plurality of complete time slots with different subcarrier spacing are time-division multiplexed within a reference subframe according to respective time slot grid patterns and positions. The boundary of a certain slot is aligned with the subframe boundary. The plurality of time slots with different subcarrier spacings allow for multiplexing with nesting. Nesting means that: one slot uses some or all of the symbols of another slot and each slot needs to be placed according to its respective slot grid pattern and position in the time direction. This approach has good scheduling flexibility and is well suited for bursty traffic, such as URLLC transmissions. In addition, this approach sometimes results in an adjusted number of symbols for one of the slots, which requires the base station to send signaling indicating the number of symbols specifically included in the slot.

In case4 of fig. 7, the position and multiplexing mode of the time slot determined by the base station are: a plurality of complete time slots with different subcarrier spacing are time-division multiplexed within a reference subframe according to respective time slot grid patterns and positions. The boundary of a certain slot is aligned with the subframe boundary. The plurality of time slots with different subcarrier spacing allows multiplexing with overlap (including partial overlap). The overlapping means that: one slot uses part or all of the symbols of another slot, and one of the slots (generally, the slot with shorter duration) does not need to be placed according to the slot grid pattern and the position in the respective time direction, and the symbols at any position of the slot with longer duration can be used. The method has good scheduling flexibility and is very suitable for the transmission of bursty services, such as URLLC. In addition, this approach sometimes results in an adjusted number of symbols for one of the slots, which requires the base station to send signaling indicating the number of symbols specifically included in the slot.

In the present application, technical features in the respective embodiments may be combined and used in one embodiment without conflict. Each example is merely the best mode of carrying out the present application.

As shown in fig. 8, an embodiment of the present application further provides an information transmission apparatus, which is applied to a sending end, where the information transmission apparatus includes:

a sending module, configured to send a control signaling in a first time slot according to a position of the first time slot formed by OFDM symbols corresponding to a first subcarrier interval;

the first transmission module allows a second time slot formed by OFDM symbols corresponding to a second subcarrier interval to be sent or received by using OFDM symbols corresponding to part or all of the first subcarrier intervals in the first time slot, and sends or receives service data according to the OFDM symbols corresponding to the second subcarrier intervals;

The information transmission apparatus may further include: the first processing module is used for forming a first time slot by the OFDM symbols corresponding to the first subcarrier interval according to the appointed number, and placing the first time slot in the time direction according to the time length sequence of the first time slot; and forming a second time slot by the OFDM symbols corresponding to the second subcarrier interval according to the appointed number, and placing the second time slot in the time direction according to the time length sequence of the second time slot.

The transmitting module may be configured to transmit control signaling in the first time slot by:

The sending module may send the control signaling according to an agreed subcarrier interval in the following manner: sending the control signaling according to the OFDM symbol corresponding to the minimum subcarrier interval in the subcarrier intervals supported by the system; or, when time slot time division multiplexing formed by OFDM symbols corresponding to different subcarrier intervals is allowed, the control signaling is sent for the OFDM symbol corresponding to the smallest subcarrier interval among the different subcarrier intervals according to the subcarrier interval.

The end position of the second slot may be located at one OFDM symbol boundary in the OFDM symbols corresponding to the first subcarrier spacing.

The information transmission apparatus may further include: and an indicating module, configured to configure and indicate the number of symbols of the second time slot to be increased or decreased to align to an OFDM symbol boundary in the OFDM symbols corresponding to the first subcarrier interval when the second time slot cannot be aligned to an OFDM symbol boundary in the OFDM symbols corresponding to the first subcarrier interval according to an appointed time length or symbol number. The indicating module can indicate the number of symbols of the second time slot to increase or decrease by the following method: the number of symbols of the second slot is indicated to be increased or decreased by a bit in control signaling.

The sending module is configured to send a control signaling in the first time slot by: sending the control signaling before actually sending and/or receiving the OFDM symbols of the service data according to the OFDM symbols corresponding to the first subcarrier intervals in the first time slot;

As shown in fig. 9, an embodiment of the present application further provides an information transmission apparatus, applied to a first receiving end, where the information transmission apparatus includes:

The determining module may be configured to determine, from the control signaling, an OFDM symbol in the first slot that is used for data transmission and/or reception according to a first subcarrier interval.

The information transmission apparatus may further include: and the second processing module is used for forming a first time slot by the OFDM symbols corresponding to the first subcarrier interval according to the appointed number, and placing the first time slot in the time direction according to the time length sequence of the first time slot.

The first receiving module is configured to receive the control signaling in the following manner: receiving control signaling at an OFDM symbol at the beginning of the first slot. Optionally, the OFDM symbol at the beginning of the first slot is received at the agreed subcarrier spacing.

The first receiving module is configured to receive the control signaling in the following manner: receiving a control signaling before actually transmitting and/or receiving an OFDM symbol of service data in the first time slot according to the OFDM symbol corresponding to the first subcarrier interval;

As shown in fig. 10, an embodiment of the present application further provides an information transmission apparatus, which is applied to a second receiving end, and the information transmission apparatus includes:

The information transmission apparatus may further include: and the third processing module is used for forming a second time slot by the OFDM symbols corresponding to the second subcarrier interval according to the appointed number, and placing the second time slot in the time direction according to the time length sequence of the second time slot.

The second receiving module is configured to receive the control signaling at an OFDM symbol at the beginning of the second slot in the following manner: and receiving the control signaling at the beginning OFDM symbol of the second time slot according to the appointed subcarrier interval.

The information transmission apparatus may further include: and a fourth processing module, configured to, when the second time slot cannot be aligned to a reference subcarrier interval or one OFDM symbol boundary of an OFDM symbol corresponding to a subcarrier interval of a subsequent time division multiplexing time slot according to an agreed duration or symbol number, increase or decrease a symbol of the second time slot according to an instruction of the sending end, so as to align to the reference subcarrier interval or one OFDM symbol boundary of an OFDM symbol corresponding to a subcarrier interval of the subsequent time division multiplexing time slot. Wherein a bit in the control signaling can indicate whether to increase or decrease a symbol of the second slot.

The detailed processing flow of the information transmission device can refer to the method embodiments, and therefore, the detailed description thereof is omitted.

An embodiment of the present application further provides an electronic device, which includes a processor and a memory storing executable instructions of the processor, and when the instructions are executed by the processor, the following operations are performed:

sending a control signaling in a first time slot according to the position of the first time slot formed by the OFDM symbols corresponding to the first subcarrier interval, and sending or receiving service data according to the OFDM symbols corresponding to the first subcarrier interval;

allowing a second time slot formed by OFDM symbols corresponding to a second subcarrier interval to be sent or received by using OFDM symbols corresponding to part or all of first subcarrier intervals in the first time slot, and sending or receiving service data according to the OFDM symbols corresponding to the second subcarrier interval;

receiving a control signaling according to the position of a first time slot formed by OFDM symbols corresponding to the first subcarrier interval; determining that OFDM symbols corresponding to part or all of first subcarrier intervals in a first time slot are used for sending or receiving service data according to the control signaling; and transmitting or receiving service data according to the OFDM symbols corresponding to the first subcarrier interval.

and receiving the control signaling at the OFDM symbol at the beginning of the second time slot according to the position of the second time slot formed by the OFDM symbols corresponding to the second subcarrier interval, and transmitting or receiving the service data according to the OFDM symbols corresponding to the second subcarrier interval.

The embodiment of the present application further provides a computer-readable storage medium, in which computer-executable instructions are stored, and when executed by a processor, the computer-executable instructions implement an information transmission method applied to a transmitting end.

The embodiment of the present application further provides a computer-readable storage medium, which stores computer-executable instructions, and when the computer-executable instructions are executed by a processor, the computer-executable instructions implement an information transmission method applied to a first receiving end.

The embodiment of the present application further provides a computer-readable storage medium, which stores computer-executable instructions, and when the computer-executable instructions are executed by a processor, the computer-executable instructions implement an information transmission method applied to a second receiving end.

It will be understood by those skilled in the art that all or part of the steps of the above methods may be implemented by a program instructing associated hardware (e.g., a processor) to perform the steps, and the program may be stored in a computer readable storage medium, such as a read only memory, a magnetic or optical disk, and the like. Alternatively, all or part of the steps of the above embodiments may be implemented using one or more integrated circuits. Accordingly, the modules/units in the above embodiments may be implemented in hardware, for example, by an integrated circuit, or may be implemented in software, for example, by a processor executing programs/instructions stored in a memory to implement the corresponding functions. The present application is not limited to any specific form of hardware or software combination.

Although the embodiments disclosed in the present application are described above, the descriptions are only for the convenience of understanding the present application, and are not intended to limit the present application. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the disclosure as defined by the appended claims.

Claims

1. An information transmission method, comprising:

a sending end sends a control signaling in a first time slot according to the position of the first time slot formed by Orthogonal Frequency Division Multiplexing (OFDM) symbols corresponding to a first subcarrier interval, and sends or receives service data according to the OFDM symbols corresponding to the first subcarrier interval;

2. The information transmission method according to claim 1, characterized in that the information transmission method further comprises: the sending end determines the position of the first time slot by the following method:

3. The information transmission method according to claim 1, characterized in that the information transmission method further comprises: the transmitting end determines the position of the second time slot by the following method:

4. The information transmission method according to claim 1, wherein starting boundaries of the first slot and the second slot are aligned, or a starting position of the second slot is aligned with a starting boundary of one symbol of the first slot, or an ending position of the second slot is aligned with an ending position of one symbol of the first slot, or starting boundaries of the first slot and the second slot within a subframe are aligned, or both the first slot and the second slot start from a boundary of a subframe.

5. The information transmission method according to claim 1, wherein the sending control signaling in the first time slot comprises:

6. The information transmission method according to claim 5, wherein the sending the control signaling according to the agreed subcarrier spacing includes:

7. The information transmission method according to claim 1, wherein the control signaling comprises: control signaling corresponding to a first time slot and control signaling corresponding to a second time slot;

8. The information transmission method according to claim 7, wherein the control signaling corresponding to the second time slot and the control signaling corresponding to the first time slot are transmitted using the same subcarrier spacing; wherein the same subcarrier spacing is a subcarrier spacing used for a second time slot.

9. The information transmission method according to claim 1, wherein the end position of the second slot is located at one OFDM symbol boundary in the OFDM symbols corresponding to the first subcarrier spacing.

10. The information transmission method according to claim 9, characterized in that the information transmission method further comprises: when the second time slot cannot be aligned to an OFDM symbol boundary in the OFDM symbols corresponding to the first subcarrier interval according to the appointed time length or the symbol number, the transmitting end configures and indicates the symbol number of the second time slot to be increased or decreased so as to be aligned to an OFDM symbol boundary in the OFDM symbols corresponding to the first subcarrier interval.

11. The information transmission method according to claim 10, wherein the transmitting end instructs the number of symbols of the second slot to increase or decrease, including: and the transmitting end indicates the number of the symbols of the second time slot to increase or decrease through bits in the control signaling.

12. The information transmission method according to claim 1, wherein the control signaling comprises: and subcarrier interval information used when the service data corresponding to the control signaling is transmitted and/or received.

13. The information transmission method according to claim 1, wherein the sending of the control signaling in the first time slot comprises: sending the control signaling before actually sending and/or receiving the OFDM symbols of the service data according to the OFDM symbols corresponding to the first subcarrier intervals in the first time slot;

14. The information transmission method of claim 13, wherein the control signaling is transmitted in OFDM symbols corresponding to a second subcarrier spacing.

15. An information transmission method, comprising:

16. The information transmission method according to claim 15, wherein the determining, by the first receiving end according to the control signaling, that the OFDM symbols corresponding to part or all of the first subcarrier intervals in the first time slot are used for transmitting or receiving traffic data includes:

17. The information transmission method according to claim 15, characterized in that the information transmission method further comprises: the first receiving end determines the position of a first time slot formed by OFDM symbols corresponding to a first subcarrier interval in the following way:

18. The information transmission method according to claim 15, wherein the receiving of the control signaling includes: receiving control signaling at an OFDM symbol at the beginning of the first slot.

19. The information transmission method according to claim 15, wherein the control signaling includes subcarrier spacing information used when the traffic data corresponding to the control signaling is transmitted and/or received.

20. The information transmission method according to claim 15, wherein the control signaling is used to indicate the number of symbols of the OFDM symbol corresponding to the first subcarrier interval included in the first time slot, the duration of the first time slot, or the end position.

21. The information transmission method according to claim 15, wherein the end position of the first slot is located at one OFDM symbol boundary of the OFDM symbol corresponding to the reference subcarrier spacing.

22. The information transmission method according to claim 15, wherein the receiving of the control signaling includes: receiving a control signaling before actually transmitting and/or receiving an OFDM symbol of service data in the first time slot according to the OFDM symbol corresponding to the first subcarrier interval;

23. The information transmission method of claim 22, wherein the control signaling is received in OFDM symbols corresponding to a second subcarrier spacing.

24. An information transmission method, comprising:

and the second receiving end receives the control signaling at the OFDM symbol at the beginning of the second time slot according to the position of the second time slot formed by the orthogonal frequency division multiplexing OFDM symbols corresponding to the second subcarrier interval, and transmits or receives the service data according to the OFDM symbols corresponding to the second subcarrier interval.

25. The information transmission method according to claim 24, wherein the information transmission method further comprises: the second receiving end determines the position of a second time slot formed by OFDM symbols corresponding to a second subcarrier interval by the following method:

26. The information transmission method of claim 24, wherein the control signaling indicates the number of symbols included in the second slot, the duration of the second slot, or the end position of the second slot.

27. The information transmission method of claim 24, wherein the receiving of the control signaling in the OFDM symbol at the beginning of the second slot comprises: and receiving the control signaling at the beginning OFDM symbol of the second time slot according to the appointed subcarrier interval.

28. The information transmission method according to claim 24, wherein the control signaling includes subcarrier spacing information used when the traffic data corresponding to the control signaling is transmitted and/or received.

29. The information transmission method of claim 24, wherein the end position of the second slot is located at one OFDM symbol boundary of an OFDM symbol corresponding to a reference subcarrier spacing or a subcarrier spacing of a subsequent time division multiplexed slot.

30. The information transmission method according to claim 29, wherein the information transmission method further comprises: and when the second time slot cannot be aligned to one OFDM symbol boundary of the OFDM symbol corresponding to the reference subcarrier interval or the subcarrier interval of the time division multiplexing time slot later according to the appointed time length or the symbol number, the second receiving end increases or decreases the symbol of the second time slot according to the indication of the sending end so as to be aligned to one OFDM symbol boundary of the OFDM symbol corresponding to the reference subcarrier interval or the subcarrier interval of the time division multiplexing time slot later.

31. The information transmission method of claim 30, wherein a bit in the control signaling can indicate whether to increase or decrease a symbol of the second slot.

32. An information transmission apparatus, applied to a transmitting end, the information transmission apparatus comprising:

33. The information transmission apparatus according to claim 32, characterized by further comprising: a first processing module, configured to form a first time slot from the OFDM symbols corresponding to the first subcarrier interval according to an appointed number, and place the first time slot in the time direction according to a time length sequence of the first time slot; and forming a second time slot by the OFDM symbols corresponding to the second subcarrier interval according to the appointed number, and placing the second time slot in the time direction according to the time length sequence of the second time slot.

34. The information transmission apparatus according to claim 32, characterized by further comprising: and an indicating module, configured to configure and indicate the number of symbols of the second time slot to be increased or decreased to align to an OFDM symbol boundary in the OFDM symbols corresponding to the first subcarrier interval when the second time slot cannot be aligned to an OFDM symbol boundary in the OFDM symbols corresponding to the first subcarrier interval according to an appointed time length or symbol number.

35. An information transmission apparatus, applied to a first receiving end, the information transmission apparatus comprising:

a first receiving module, configured to receive a control signaling according to a position of a first time slot formed by Orthogonal Frequency Division Multiplexing (OFDM) symbols corresponding to a first subcarrier interval;

36. The information transmission apparatus of claim 35, wherein the determining module is configured to determine, from the control signaling, an OFDM symbol in the first slot that is used for data transmission and/or reception at a first subcarrier spacing.

37. The information transmission apparatus according to claim 35, characterized by further comprising: and a second processing module, configured to form a first time slot from the OFDM symbols corresponding to the first subcarrier interval according to the predetermined number, and place the first time slot in the time direction according to the time length sequence of the first time slot.

38. An information transmission apparatus, applied to a second receiving end, the information transmission apparatus comprising:

a second receiving module, configured to receive a control signaling at a beginning OFDM symbol of a second time slot according to a position of the second time slot formed by OFDM symbols corresponding to a second subcarrier interval;

39. The information transmission apparatus according to claim 38, characterized by further comprising: and a third processing module, configured to form a second time slot from the OFDM symbols corresponding to the second subcarrier interval according to the predetermined number, and place the second time slot in the time direction according to the time length sequence of the second time slot.

40. The information transmission apparatus according to claim 38, characterized by further comprising: and a fourth processing module, configured to, when the second time slot cannot be aligned to a reference subcarrier interval or one OFDM symbol boundary of an OFDM symbol corresponding to a subcarrier interval of a subsequent time division multiplexing time slot according to an agreed duration or symbol number, increase or decrease a symbol of the second time slot according to an instruction of the sending end, so as to align to the reference subcarrier interval or one OFDM symbol boundary of an OFDM symbol corresponding to a subcarrier interval of the subsequent time division multiplexing time slot.