WO2018010648A1

WO2018010648A1 - Signal transmission method and device

Info

Publication number: WO2018010648A1
Application number: PCT/CN2017/092532
Authority: WO
Inventors: 陈冬雷; 柏钢; 夏树强; 左志松; 游爱民
Original assignee: 中兴通讯股份有限公司
Priority date: 2016-07-12
Filing date: 2017-07-11
Publication date: 2018-01-18
Also published as: CN107613568A; CN107613568B

Abstract

A signal transmission method comprises a base station transmitting a downlink transmission part consisting of a number p of OFDM symbols, the downlink transmission part at least including downlink control information, downlink data, and an uplink grant, wherein the downlink control information is used for indicating downlink data allocation and the uplink grant is used for indicating uplink data allocation, wherein the downlink control information is transmitted on one or more symbols in the first i OFDM symbols, the uplink grant is transmitted on continuous j OFDM symbols after the first i OFDM symbols, and the downlink data is transmitted at least on one or more symbols of a number p-i-j OFDM symbols beyond the first i OFDM symbols and the continuous j OFDM symbols, where 0<i<p, 0<j<p, p-i-j>0, and i, j, and p are positive integers.

Description

Signal transmission method and device

Technical field

The present disclosure relates to, but is not limited to, the field of Long Term Evolution (LTE) and the NR (New Radio) mobile communication network, and in particular, to a signal transmission method and apparatus related to a frame structure.

Background technique

With the advent of new applications in industrial automation and industrial control, telemedicine, smart grid and other industrial fields, higher requirements have been placed on wireless cellular communications, including lower latency and higher reliability. In order to meet the requirements of these ultra-reliable low-latency communication (URLC, Ultra-Reliable and Low Latency Communications) services, 3GPP (Third Generation Partnership Project) began research on 5G mobile communication systems. For the URLLC service, the downlink and uplink user plane delays are respectively 0.5 milliseconds (ms), and the delay index is an average delay without high reliability requirements. For high reliability, the goal of the URLLC service is to successfully transmit a packet within 1ms with a probability of 99.999%. In addition, for applications such as telemedicine, it is also necessary to meet the rate of 300 Mbps.

In order to meet the low latency and high reliability indicators of the URLLC service, 3GPP proposes the ability to perform fast feedback and fast retransmission for the downlink data channel in the 5G air interface frame structure. For the uplink data transmission, it can be received after the uplink authorization is received. It can be done soon. In order to enable uplink fast retransmission, 3GPP proposes to study whether it is necessary to introduce a GP after the uplink transmission, which may cause an increase in GP overhead.

Summary of invention

The following is an overview of the topics detailed in this document. This Summary is not intended to limit the scope of the claims.

The present disclosure provides a signal transmission method and apparatus to solve the technical problem that a large amount of overhead in time interval X reduces transmission efficiency.

In a first aspect, the present disclosure provides a signal transmission method, including:

The base station sends a downlink sending part, where the downlink sending part includes at least downlink control information, downlink data, and an uplink grant; the downlink control information is used to indicate downlink data allocation, and the uplink grant is used to indicate uplink data allocation; The downlink control information and the uplink grant are sent on different symbols.

The downlink transmitting part is composed of p orthogonal frequency division multiplexing (OFDM) symbols, and the downlink control information is sent on one or more symbols of the first i OFDM symbols; the uplink grant is located in the Transmitting on consecutive j OFDM symbols after the first i OFDM symbols; the downlink data is at least one or more symbols of the first i OFDM symbols and pij OFDM symbols other than the consecutive j OFDM symbols Transmitted, where 0<i<p, 0<j<p,pij>0, i, j, p are positive integers.

The above method may further include:

The base station transmits a downlink transmission part consisting of p OFDM symbols and then transmits a downlink transmission part consisting of n OFDM symbols, the n is a positive integer greater than 0, and the uplink transmission part includes at least an uplink control. Information and uplink data;

The downlink sending part, the guard interval, and the uplink sending part form a time interval, and the time interval length is less than or equal to 4 ms.

The base station receiving the uplink sending part that is sent by the terminal and consisting of n OFDM symbols may include:

The uplink control information includes hybrid automatic repeat request (HARQ) feedback for downlink data, and the HARQ feedback is received on a predetermined k symbols, where the k symbols are located before the last h OFDM symbols of the uplink transmitting part Where 0 < k < n, 0 < h < n, k + h <= n, k, h are positive integers;

The uplink data is received on one or more of the n-k symbols other than the predetermined k symbols.

The uplink grant is sent on consecutive j OFDM symbols after the first i symbols, and may include at least one of the following five situations:

The downlink data is not included in the j OFDM symbols, and the uplink grant is in a downlink control channel. Send on

The downlink data is not included in the j OFDM symbols, and the uplink grant is sent on the downlink data channel;

The j OFDM symbols include downlink data, the uplink grant is sent on a downlink control channel, the downlink data is sent on a downlink data channel, and the downlink control channel and the downlink data channel are frequency division multiplexed;

The j OFDM symbols include downlink data, and the uplink grant and the downlink data are sent on a downlink data channel in a time-frequency multiplex manner;

The j OFDM symbols include downlink data, the uplink grant is sent on a downlink control channel, and the uplink grant and the downlink data are sent on a downlink data channel in a time-frequency multiplex manner, the downlink control channel Frequency division multiplexing with the downlink data channel.

The receiving the HARQ feedback on the predetermined k symbols may include at least one of the following five situations:

The uplink data is not included in the k OFDM symbols, and the HARQ feedback is received on an uplink control channel;

The uplink data is not included in the k OFDM symbols, and the HARQ feedback is received on an uplink data channel;

The k OFDM symbols include uplink data, receive the HARQ feedback on an uplink control channel, receive the uplink data on an uplink data channel, and perform frequency division multiplexing on the uplink control channel and the uplink data channel;

The k OFDM symbols include uplink data, and the HARQ feedback and the uplink data are received on an uplink data channel, and the HARQ feedback and the uplink data are time-frequency multiplexed;

The k OFDM symbols include uplink data, the HARQ feedback is received on an uplink control channel, the HARQ feedback and the uplink data are received on an uplink data channel, and the HARQ feedback and the uplink data are time-frequency-transmitted. Multiplexing, the uplink control channel is frequency division multiplexed with the uplink data channel.

The downlink data and the downlink control information indicating the downlink data allocation may be located in the same downlink sending part.

The downlink data and the uplink control information for performing HARQ feedback on the downlink data may be located in the same time interval.

The uplink data and the uplink grant indicating the uplink data allocation may be located in the same time interval.

The uplink control information may include channel state information, and the channel state information is received on a predetermined c symbols, where the c symbols are located before a last b OFDM symbols of the uplink sending part, where 0<c <n, 0<b<n, c+b<=n, c, b are positive integers, and the channel state information includes a channel quality indicator (CQI), a precoding matrix indication (PMI), and a rank indication (RI). One or more.

The length of the p OFDM symbols for the downlink transmission part, the n OFDM symbols for the uplink transmission part, and the guard interval may be semi-statically configured by the base station through the system broadcast message, or by being located in the front i The downlink control commands on one or more of the OFDM symbols are dynamically configured and notified to the terminal, or by convention rules without notice.

The value of i in the first i OFDM symbols, the value of j in the consecutive j OFDM symbols, and the position of j OFDM symbols in the downlink sending part may be semi-static by the base station through the system broadcast message. The notification is configured to the terminal, or dynamically configured by a downlink control command located on one or more symbols in the first i OFDM symbols, or by a convention rule without notification.

The value of k in the predetermined k OFDM symbols and the position of the k OFDM symbols in the uplink sending part may be notified to the terminal by the base station through a system broadcast message semi-static configuration, or by being located before the Downlink control commands on one or more of the i OFDM symbols are either notified by a downlink control command located in the consecutive j OFDM symbols, or by a convention rule without notification.

The value of c in the c OFDM symbols and the position of the c OFDM symbols in the uplink sending part may be notified to the terminal by the base station through a system broadcast message semi-static configuration, or by being located in the first i Downlink control commands on one or more symbols in the OFDM symbol are either notified by a downlink control command located in the consecutive j OFDM symbols, or by an agreed rule convention without notification.

Wherein at least the downlink control is used before the configured or agreed j consecutive symbols The number of symbols transmitted by the message can have a minimum value.

The minimum value may be determined according to a processing time of the uplink data and a preparation time of the uplink grant and a length of each OFDM symbol within the time interval.

Wherein, the number h of symbols after the configured or agreed k OFDM symbols may have a minimum value.

The minimum value may be determined according to a processing time of the uplink control information, a preparation time of the downlink scheduling, and a length of each OFDM symbol within the time interval.

In a second aspect, the present disclosure also provides a signal transmission method, including:

The terminal receives the downlink sending part sent by the base station, where the downlink sending part includes at least downlink control information, downlink data, and an uplink grant; the downlink control information is used to indicate downlink data allocation, and the uplink grant is used to indicate uplink data allocation. The downlink control information and the uplink grant are sent on different symbols.

The downlink transmitting part is composed of p OFDM symbols, and the downlink control information is received on one or more symbols of the first i symbols; one of consecutive j symbols after the first i symbols Receiving the uplink grant on the plurality of symbols; receiving the downlink data on at least one of the first i symbols and the pij OFDM symbols except the consecutive j symbols, where 0< i<p,0<j<p,pij>0, i, j, p are positive integers.

The above method may further include:

After receiving the downlink transmission part consisting of p OFDM symbols sent by the base station, the terminal transmits an uplink transmission part consisting of n OFDM symbols, and n is a positive integer greater than 0, and the uplink transmission part includes at least uplink control. Information and uplink data;

The terminal sends an uplink sending part that is composed of n OFDM symbols, and may include:

The uplink control information includes HARQ feedback for downlink data, and the HARQ feedback is sent on one or more symbols of a predetermined k symbols, where the k symbols are located before the last h OFDM symbols of the uplink transmitting part Where 0 < k < n, 0 < h < n, k + h <= n, k, h are positive integers;

The uplink data is transmitted on at least one of the n-k symbols outside the k symbols.

The receiving the uplink grant on consecutive j OFDM symbols after the first i symbols may include at least one of the following four cases:

The downlink data is not included in the j OFDM symbols, and the uplink grant is received on the downlink control channel;

The downlink data is not included in the j OFDM symbols, and the uplink grant is received on the downlink data channel;

The j OFDM symbols include downlink data, receive the uplink grant on a downlink control channel, receive the downlink data on a downlink data channel, and perform frequency division multiplexing on the downlink control channel and the downlink data channel;

The j OFDM symbols include downlink data, and the uplink grant and the downlink data are received on a downlink data channel, and the uplink grant and the downlink data are time-frequency multiplexed.

The HARQ feedback is sent on a predetermined k symbols, and may include at least one of the following four situations:

The uplink data is not included in the k OFDM symbols, and the HARQ feedback is sent on an uplink control channel;

The uplink data is not included in the k OFDM symbols, and the HARQ feedback is sent on the uplink data channel;

The k OFDM symbols include uplink data, the HARQ feedback is sent on an uplink control channel, the uplink data is sent on an uplink data channel, and the uplink control channel and the uplink data channel are frequency division multiplexed;

The k OFDM symbols include uplink data, and the HARQ feedback and the uplink data are transmitted on an uplink data channel in a time-frequency multiplexed manner.

The uplink control information may include channel state information, where the channel state information is sent on a predetermined c symbols, where the c symbols are located before a last b OFDM symbols of the uplink sending part, where 0<c <n, 0<b<n, c+b<=n, c, b is a positive integer, and the channel state information includes one or more of CQI, PMI, and RI.

The length of the p OFDM symbols for the downlink transmission part, the n OFDM symbols for the uplink transmission part, and the guard interval may be semi-statically configured by the base station through the system broadcast message, or by being located in the front i Downlink control commands on one or more symbols in the OFDM symbols are dynamically configured to notify the terminal, or by convention rules without notification.

The value of i in the first i OFDM symbols, the value of j in the consecutive j OFDM symbols, and the position of the j OFDM symbols in the downlink sending part may be semi-static by the base station through the system broadcast message. The notification is configured to the terminal, or dynamically configured by a downlink control command located on one or more symbols in the first i OFDM symbols, or by a convention rule without notification.

The value of k in the predetermined k symbols and the position of the k OFDM symbols in the uplink sending part may be notified to the terminal by the base station through a system broadcast message semi-static configuration, or by being located in the front i The downlink control commands on one or more of the OFDM symbols are either notified by a downlink control command located in the consecutive j OFDM symbols, or by an appointment rule without notification.

The number of symbols used for transmitting the downlink control information before the configured or agreed j consecutive symbols may have a minimum value.

In a third aspect, the present disclosure provides a signal transmission apparatus, which is applied to a base station, and includes:

The first transmission unit is configured to send a downlink sending part, where the downlink sending part includes at least downlink control information, downlink data, and an uplink grant; the downlink control information is used to indicate downlink data allocation, and the uplink grant is used to indicate Uplink data allocation; the downlink control information and the uplink grant are sent on different symbols.

The downlink transmitting part is composed of p OFDM symbols, and the downlink control information is sent on one or more symbols of the first i OFDM symbols; the uplink grant is located consecutive after the first i OFDM symbols Transmitting on j OFDM symbols; the downlink data is transmitted on at least one of the first i OFDM symbols and pij OFDM symbols other than the consecutive j OFDM symbols, where 0<i< p, 0 < j < p, pij > 0, i, j, p are positive integers.

The first transmission unit may be further configured to: after transmitting a downlink transmission part consisting of p OFDM symbols, after a guard interval, the uplink transmission part consisting of n OFDM symbols sent by the receiving terminal, where n is greater than a positive integer of 0, where the uplink sending part includes at least uplink control information and uplink data;

The downlink data is not included in the j OFDM symbols, and the uplink grant is sent on the downlink control channel;

The j OFDM symbols include downlink data, and the uplink grant is on a downlink control channel. Transmitting, the downlink data is sent on a downlink data channel, and the downlink control channel and the downlink data channel are frequency division multiplexed;

In a fourth aspect, the present disclosure further provides a signal transmission apparatus, which is applied to a terminal, and includes:

The second transmission unit is configured to receive a downlink transmission part that is sent by the base station, where the downlink transmission part includes at least downlink control information, downlink data, and an uplink authorization, where the downlink control information is used to indicate downlink data distribution, and the uplink authorization For indicating uplink data allocation; the downlink control information and the uplink grant are sent on different symbols.

The downlink transmitting part is composed of p OFDM symbols, and receives the downlink control information on one or more symbols of the first i symbols; and receives the consecutive j symbols after the first i symbols The uplink grant is received; the downlink data is received on at least one of the first i symbols and the pij OFDM symbols except the consecutive j symbols, where 0<i<p,0<j <p,pij>0,i,j,p is a positive integer.

The second transmission unit may be further configured to: after receiving a downlink transmission part consisting of p OFDM symbols sent by the base station, send an uplink transmission part consisting of n OFDM symbols, where n is greater than one guard interval. a positive integer of 0, where the uplink sending part includes at least uplink control information and uplink data;

Further, the present disclosure provides a computer readable medium storing a signal transmission program that implements the signal transmission method of the first aspect described above when executed by a processor.

Further, the present disclosure provides a computer readable medium storing a signal transmission program that implements the signal transmission method of the second aspect described above when executed by a processor.

In the technical solution provided by the disclosure, the base station sends a downlink sending part, where the downlink sending part includes at least downlink control information, downlink data, and an uplink grant; the downlink control information is used to indicate downlink data allocation, and the uplink grant is used to indicate Uplink data allocation; the downlink control information and the uplink grant are sent on different symbols. The downlink transmitting part is composed of p orthogonal frequency division multiplexing (OFDM) symbols, and the downlink control information is sent on one or more symbols of the first i OFDM symbols; the uplink grant is located in the Transmitting on consecutive j OFDM symbols after the first i OFDM symbols; the downlink data is at least one or more symbols of the first i OFDM symbols and pij OFDM symbols other than the consecutive j OFDM symbols Transmitted, where 0<i<p, 0<j<p,pij>0, i, j, p are positive integers. As such, the new TDD transmission structure provided by the present disclosure will bring a fixed HARQ RTT (round trip time) and improve transmission efficiency within the time interval X.

Other aspects will be apparent upon reading and understanding the drawings and detailed description.

BRIEF abstract

The accompanying drawings, which are not necessarily to the

1 is a schematic structural diagram of the following line transmission centered in time interval X;

2 is a schematic structural diagram of the above-mentioned row transmission centered in the time interval X;

FIG. 3 is a schematic diagram of adding a GP to perform downlink fast retransmission after uplink transmission;

4 is a schematic diagram of adding an GP to perform uplink fast retransmission after uplink transmission;

FIG. 5 is a first schematic diagram of a signal transmission method in a time interval X according to an embodiment of the present disclosure;

6 is a second schematic diagram of a signal transmission method in a time interval X according to an embodiment of the present disclosure;

FIG. 7 is a third schematic diagram of a signal transmission method in a time interval X according to an embodiment of the present disclosure;

FIG. 8 is a fourth schematic diagram of a signal transmission method in a time interval X according to an embodiment of the present disclosure;

9 is a schematic diagram 1 of signal transmission of an uplink transmitting portion;

10 is a schematic diagram 2 of signal transmission of an uplink transmitting part;

11 is a schematic diagram 3 of signal transmission of an uplink transmitting part;

12 is a schematic diagram 4 of signal transmission of an uplink transmitting portion;

Figure 13 is a schematic diagram 1 of signal transmission of a downlink transmitting portion;

14 is a schematic diagram 2 of signal transmission of a downlink transmitting part;

15 is a schematic diagram 3 of signal transmission of a downlink transmitting part;

16 is a schematic diagram 4 of signal transmission of a downlink transmitting portion;

Figure 17 is a schematic diagram of fast retransmission under the method of the present disclosure;

18 is a schematic diagram of signal transmission of an FDD system using the disclosed method;

19 is a schematic diagram of comparison of GP overheads when the same data transmission resource is used;

FIG. 20 is a schematic flowchart 1 of a signal transmission method according to an embodiment of the present disclosure;

FIG. 21 is a second schematic flowchart of a signal transmission method according to an embodiment of the present disclosure;

FIG. 22 is a first schematic structural diagram of a signal transmission apparatus according to an embodiment of the present disclosure;

FIG. 23 is a second schematic structural diagram of a signal transmission apparatus according to an embodiment of the present disclosure.

Detailed

The implementation of the embodiments of the present disclosure is described in detail below with reference to the accompanying drawings.

For the TDD (Time Division Duplexing) communication mode, in a given time interval X (time interval X), two time domain structures need to be studied, one is a structure centered on the downlink transmission, as shown in FIG. As shown, the downlink transmission part includes downlink control (DL ctrl, downlink control) and downlink data (DL data, downlink data), and the uplink transmission part includes uplink control information (UL ctrl, uplink) Control), and there is a guard interval (GP) between the downstream transmitting portion and the upstream transmitting portion. The other is a structure centered on uplink transmission, as shown in Figure 2, on the downlink. The downlink transmission part includes a UL grant (uplink grant), and the uplink transmission part includes uplink data (UL data, uplink data) and uplink control information, and a protection exists between the downlink transmission part and the uplink transmission part. GP, guard period.

When the above two time domain structures are used for downlink data transmission and uplink data transmission respectively, the time interval X ratios of the two time domain structures will be different in a specific time, as the uplink and downlink traffic requirements change. The uplink and downlink ratios under the TDD frame structure in the current LTE standard are different. When the downlink traffic increases, the proportion of the time interval X centered on the following line transmission is increased. Due to the influence of the frame alignment time and the retransmission time, the average delay of the uplink is inevitably brought. Similarly, for the increase of the upstream traffic, increasing the proportion of the time interval X centered on the above-mentioned row transmission will result in a larger average delay of the downlink due to the influence of the frame alignment time and the retransmission time. That is to say, the delay of the URLLC service will be affected by the change in the proportion of upstream and downstream traffic. Since the URLLC service requires 0.5ms for both uplink and downlink delays, this will result in the uplink and downlink delay requirements not being met at some ratios. In addition, the retransmission timing relationship will become more complicated and cannot be quickly retransmitted.

In order to enable uplink fast retransmission, 3GPP (Third Generation Partnership Project) proposes to study whether it is necessary to introduce a GP after uplink transmission, as shown in Figure 3 and Figure 4. In FIG. 3, in the time interval X centered on the following line, a GP is introduced after the uplink control information, and is used for processing uplink control information reception and preparing for downlink retransmission scheduling; FIG. 4 is a time interval centered on the above line transmission. In X, a GP is introduced after uplink data transmission, for processing uplink data reception and preparing for uplink retransmission scheduling. Introducing another GP after the uplink transmission brings more overhead to the time interval X, which will significantly reduce the transmission efficiency. In addition, for self-contained HARQ (Hybrid Automatic Repeat reQuest) feedback or uplink data response, the GP in FIG. 1 and FIG. 2 also needs to reserve sufficient time for the UE to process the received downlink channel and To prepare for the transmission of the upstream channel, the overhead of the GP may be relatively large.

In order to solve the problem that the delay varies with the uplink and downlink traffic ratio and the overhead of introducing a GP for fast retransmission, the embodiment of the present disclosure provides a new signal transmission. In the current 3GPP conference, it is also pointed out that the introduction of a new new TDD signal transmission structure different from the above two time domain structures is not excluded.

An embodiment of the present disclosure provides a signal transmission method, in which a base station sends a downlink transmission part, where the downlink transmission part includes at least downlink control information, downlink data, and an uplink grant, and the downlink control information is used to indicate downlink data allocation. The uplink grant is used to indicate uplink data allocation; the downlink control information and the uplink grant are sent on different symbols. The downlink transmitting part is composed of p Orthogonal Frequency Division Multiplexing (OFDM) symbols; the downlink control information is sent on one or more symbols of the first i OFDM symbols; An uplink grant is sent on consecutive j OFDM symbols after the first i OFDM symbols; the downlink data is at least in the first i OFDM symbols and pij OFDM symbols other than the consecutive j OFDM symbols Transmitted on one or more symbols, where 0 < i < p, 0 < j < p, pij > 0, i, j, p are positive integers.

The signal transmission method of the embodiment of the present disclosure includes both a TDD duplex mode and a FDD (Frequency Division Duplexing) duplex mode, and the FDD and the TDD maintain a similar signal transmission mode, and can also be simplified. The design of the new wireless access technology NR.

Embodiment 1

FIG. 5 is a schematic diagram of signal transmission in accordance with the TDD method using the method of the present disclosure. The base station first sends the downlink control information on the first two symbols, and then sends the downlink data. Before transmitting the downlink data, the downlink reference signal (RS, Reference Signal) for downlink data demodulation needs to be sent, and the downlink reference for demodulation is used. The signal is transmitted on one symbol, the downlink data is transmitted on five symbols, the uplink grant (UL grant) is inserted in the middle of the downlink data, and is transmitted on two symbols, and the base station transmits the downlink control information and the downlink reference signal in the downlink transmission part. After the downlink data and the uplink grant, there is a guard interval (GP) of 2 symbols. Within the two symbols, the base station neither transmits data nor receives data, and then the base station receives the uplink reference signal, the uplink control information, and the uplink data. The uplink reference signal is first received for uplink data demodulation, and the uplink control information is inserted into the uplink data for reception.

In this embodiment, the downlink data part and the downlink control information indicating the downlink data allocation are located in the same time interval, that is, the downlink control information sent on the first two symbols indicates the allocation of the downlink data sent on the next five symbols. . The downlink data part and the uplink control information for performing HARQ feedback on the downlink data are located in the same time interval, that is, the uplink control information including the HARQ feedback sent by the uplink transmitting part on the two symbols is performed on the downlink data in the current time interval. HARQ feedback. In addition, in this embodiment, the uplink data and the uplink grant indicating the uplink data allocation are also located in the same time interval, that is, the uplink grant part sent by the downlink sending part on the two symbols indicates that the uplink sending part is sent on five symbols. The allocation of upstream data. At least one of CQI (Channel Quality Indicator), RI (Rank Indication), and PMI (Precoding Matrix Indicator) is used to transmit the latest channel state information at the next time interval. The item will also be transmitted in the 2 symbol uplink control information, so that the base station receives the information in advance and processes it, so that the channel status information can be used for downlink data transmission at the next time interval.

17 is a schematic diagram of fast retransmission based on the method of the present disclosure. For the downlink retransmission transmission, after transmitting the uplink control information including the HARQ feedback information, the terminal continues to send the uplink data, and the base station performs the HARQ feedback processing and the downlink scheduling preparation by using the part of the time of the uplink data transmission, when the uplink data is sent. The base station may retransmit the downlink data that failed to be transmitted in the last time interval based on the HARQ feedback processing and the downlink scheduling preparation. The uplink retransmission transmission is similar to the downlink retransmission transmission. After receiving the uplink data, the base station uses the downlink data to transmit the uplink data processing and the uplink scheduling preparation. After the uplink data processing and the uplink scheduling preparation are completed, the uplink authorization can be used to transmit the failed uplink in the last time interval. The data is retransmitted.

In this embodiment, it is assumed that the time interval is 0.5 ms, including 20 OFDM symbols. The length of the downlink transmitting part, the GP, and the uplink transmitting part in the interval of 0.5 ms are respectively 10 symbols, 2 symbols, and 8 symbols, and the length of each part can be semi-statically configured to the terminal through the system broadcast message or through protocol agreement. The notification of the length of each part of the terminal may be notified by dynamically transmitting a downlink control command every time interval or every several time intervals in the two symbols transmitting the downlink control information without notification.

In this embodiment, the downlink control information is sent on two symbols, and the downlink authorization is inserted into the downlink data of three symbols and transmitted on two symbols, and the number of symbols used for downlink control information transmission and the symbol used for uplink authorization transmission are used. The number and the location of the uplink grant in the downlink transmission part may be semi-statically configured to the terminal through the system broadcast message or through protocol agreement without notification, or may be passed every time interval or every number of 2 symbols in the downlink control information. The time interval is dynamically sent to notify the terminal of the downlink control command. In this embodiment, the uplink control information is inserted into one symbol and the uplink data is transmitted, and then transmitted on two symbols, and the uplink control information is transmitted by using the symbol. The number and the position in the uplink transmitting part may be semi-statically configured to the terminal through the system broadcast message or through protocol agreement without notification, or may be sent in two symbols of the downlink control information or two symbols of the uplink grant. The downlink control command is dynamically sent to the terminal every time interval or every several time intervals.

In this embodiment, the uplink grants sent on the two symbols are mapped to the downlink control channel for transmission, and no downlink data is transmitted in the two symbols. FIG. 13 shows that the uplink grant is mapped to the downlink data channel for transmission, but there is no downlink data transmission in the downlink data channel for the uplink grant transmission of the two symbols. Fig. 14, Fig. 15, and Fig. 16 show the case when data is transmitted in two symbols for transmitting an uplink grant. In Figure 14, the uplink grant is sent in the downlink control channel, the downlink data is transmitted in the downlink data channel, and the downlink control channel and the downlink data channel are frequency-division multiplexed in two symbols. In Figure 15, the uplink grant is sent in the downlink control channel or the downlink data channel. When the uplink grant is sent in the downlink data channel, the uplink grant and the downlink data are time-frequency multiplexed, or some of the terminals are uplink when there is no downlink data. The authorization is separately transmitted on the downlink control channel, and the downlink control channel and the downlink data channel are transmitted by means of frequency division multiplexing. In Figure 16, the uplink grant and downlink data are transmitted in the downlink data channel in a time-frequency multiplexed manner. When some terminals do not transmit downlink data, the uplink grant is separately sent on the data channel. The 2-symbol uplink grant portion given in FIG. 5 associated with the present embodiment may also be transmitted in any of the manners of FIG. 13, FIG. 14, FIG. 15, or FIG.

In this embodiment, the uplink control information including the HARQ feedback transmitted on the two symbols is mapped to the uplink control channel for transmission, and there is no uplink data transmission in the two symbols. FIG. 9 shows that the uplink control information including the HARQ feedback is mapped to the uplink data channel for transmission, but there is no uplink data transmission in the uplink data channel for the uplink control information transmission of the two symbols. Fig. 10, Fig. 11, and Fig. 12 show the case when data is transmitted in the symbol for transmitting the uplink control information. In FIG. 10, the uplink control information including the HARQ feedback is transmitted in the uplink control channel, the uplink data is transmitted in the uplink data channel, and the uplink control channel and the uplink data channel are transmitted in the two symbols by means of frequency division multiplexing. In Figure 11, the uplink control information is sent in the uplink control channel or the uplink data channel. When the uplink control information is sent in the uplink data channel, the uplink data is time-frequency multiplexed, or some of the terminals are uplinked when there is no uplink data. The control information is separately transmitted on the uplink control channel, and the uplink control channel and the uplink data channel are transmitted by means of frequency division multiplexing. In Figure 12, the uplink control information and the uplink data are transmitted in the uplink data channel in a time-frequency multiplexed manner. When some terminals do not transmit uplink data, the uplink control information is separately transmitted on the data channel. The 2-symbol uplink control information portion given in FIG. 5 related to the present embodiment may also be transmitted in any of the manners of FIG. 9, FIG. 10, FIG. 11, or FIG. In addition, the uplink control information sent on the two symbols may include an uplink scheduling request, where the terminal requests the uplink resource allocation from the base station, and the uplink control information including the scheduling request is sent in the uplink control channel or sent in the uplink data channel.

Embodiment 2

Figure 6 is a schematic diagram of another signal transmission in accordance with the TDD method using the disclosed method. The base station first sends the downlink control information on the first two symbols, and then sends the downlink data. Before transmitting the downlink data, the downlink reference signal for downlink data demodulation needs to be sent, and the downlink reference signal used for demodulation is on one symbol. Sending, downlink data is sent on 5 symbols, and the uplink grant is sent on 2 symbols after the downlink data is sent. After the downlink transmitting part sends the downlink control information, the downlink reference signal, the downlink data, and the uplink grant, the base station has a The guard interval (GP) is 2 symbols. Within these two symbols, the base station neither transmits data nor receives data, and then the base station receives the uplink reference signal, the uplink control information, and the uplink data, and the uplink control transmitted on the two symbols. The information is received first, then receives the uplink reference signal for uplink data demodulation, and finally receives the uplink data.

In this embodiment, the downlink data part and the downlink control information indicating the downlink data allocation are located in the same time interval, that is, the downlink control information sent on the first two symbols indicates the allocation of the downlink data sent on the next five symbols. . The downlink data part and the uplink control information for performing the HARQ feedback on the downlink data are located in the same time interval, that is, the uplink control information including the HARQ feedback sent by the uplink transmitting part on the two symbols performs HARQ feedback on the downlink data in the current time interval. . In addition, in this embodiment, the uplink data and the uplink grant indicating the uplink data allocation are also located in the same time interval, that is, the uplink grant part sent by the downlink sending part on the two symbols indicates that the uplink sending part is sent on five symbols. The allocation of upstream data. In order to utilize the latest channel state information when transmitting at the next time interval, at least one of CQI, RI and PMI will also be transmitted in the uplink control information of 2 symbols, so that the base station receives the information and processes it in advance. Therefore, the downlink data transmission can be performed by using the channel state information at the next time interval.

In this embodiment, it is assumed that the time interval is 0.5 ms, including 20 OFDM symbols. The length of the downlink transmitting part, the GP, and the uplink sending part in the 0.25 ms interval is 10 symbols, 2 symbols, and 8 symbols, respectively, and the length of each part can be semi-statically configured to the terminal through the system broadcast message or through protocol agreement. The notification of the length of each part of the terminal may be notified by dynamically transmitting a downlink control command every time interval or every several time intervals in the two symbols transmitting the downlink control information without notification.

In this embodiment, the downlink control information is sent on two symbols, and the uplink grant is sent on two symbols after the downlink data is sent, the number of symbols used for downlink control information transmission, the number of symbols used for uplink grant transmission, and uplink. The location of the authorization in the downlink transmission part may be semi-statically configured to the terminal through the system broadcast message or through protocol agreement without notification, or may be through each time interval or every several time interval in the two symbols for transmitting the downlink control information. The downlink control command is dynamically sent to notify the terminal. In this embodiment, the uplink control information is sent on two symbols, and the uplink transmission part is transmitted first, and the number of symbols used for uplink control information transmission and the position in the uplink transmission part can be semi-statically configured by the system broadcast message. The terminal may notify the terminal by dynamically transmitting a downlink control command every time interval or every several time intervals in the two symbols that send the downlink control information or the two symbols that send the uplink grant in the two symbols that send the downlink control information.

Similar to the first embodiment, in this embodiment, the uplink grants sent on the two symbols are mapped to the downlink control channel for transmission, and no downlink data is transmitted in the two symbols. FIG. 13 shows that the uplink grant is mapped to the downlink data channel for transmission, but there is no downlink data transmission in the downlink data channel for the uplink grant transmission of the two symbols. Fig. 14, Fig. 15, and Fig. 16 show the case when data is transmitted in two symbols for transmitting an uplink grant. The uplink grant portion transmitted on the two symbols given in FIG. 6 associated with the present embodiment may also be transmitted in any of the manners of FIG. 13, FIG. 14, FIG. 15, or FIG.

Similar to the first embodiment, in this embodiment, the uplink control information including the HARQ feedback transmitted on the two symbols is mapped to the uplink control channel for transmission, and there is no uplink data transmission in the two symbols. FIG. 9 shows that the uplink control information including the HARQ feedback is mapped to the uplink data channel for transmission, but there is no uplink data transmission in the uplink data channel for the uplink control information transmission of the two symbols. Figure 10, Figure 11, and Figure 12 show the data in the two symbols that send the uplink control information. The situation when sending. The uplink control information portion transmitted on the two symbols given in FIG. 6 related to the present embodiment may also be transmitted in any one of FIG. 9, FIG. 10, FIG. 11, or FIG. In addition, the uplink control information sent on the two symbols may include an uplink scheduling request, where the terminal requests the uplink resource allocation from the base station, and the uplink control information including the scheduling request is sent in the uplink control channel or sent in the uplink data channel.

Embodiment 3

7 is a schematic diagram of another signal transmission in accordance with the TDD method using the disclosed method. The base station first sends the downlink control information on the first two symbols, and then sends the downlink data. Before transmitting the downlink data, the downlink reference signal for downlink data demodulation needs to be sent, and the downlink reference signal used for demodulation is on one symbol. Sending, downlink data transmission is sent on 5 symbols, and the uplink grant is inserted in the middle of the downlink data and sent on 2 symbols. After the downlink transmitting part sends the downlink control information, the downlink reference signal, the downlink data, and the uplink grant, the base station has A guard interval (GP) is 2 symbols. In these 2 symbols, the base station neither transmits data nor receives data, and then the base station receives the uplink reference signal, the uplink control information, and the uplink data, and sends the uplink on the 2 symbols. The control information is first received, then receives an uplink reference signal for uplink data demodulation, and finally receives uplink data.

In this embodiment, it is assumed that the time interval is 0.25 ms, including 20 OFDM symbols. The length of the downlink transmission part, the GP, and the uplink transmission part in the 0.25 ms interval is 10 symbols, respectively. 2 symbols and 8 symbols, the length of each part can be semi-statically configured to the terminal through the system broadcast message or through protocol agreement without notification, or can be passed every time interval or every 2 symbols in the downlink control information. The downlink control command is dynamically sent for several time intervals to notify the terminal of the change in the length ratio of each part.

In this embodiment, the downlink control information is sent on two symbols, and the downlink authorization is inserted into the downlink data of three symbols and transmitted on two symbols, and the number of symbols used for downlink control information transmission and the symbol used for uplink authorization transmission are used. The number and the location of the uplink grant in the downlink transmission part may be semi-statically configured to the terminal through the system broadcast message or through protocol agreement without notification, or may be passed every time interval or every number of 2 symbols in the downlink control information. The time interval is dynamically sent to notify the terminal of the downlink control command. In this embodiment, the uplink control information is sent on two symbols, and the uplink transmission part is transmitted first, and the number of symbols used for uplink control information transmission and the position in the uplink transmission part can be semi-statically configured by the system broadcast message. The terminal may notify the terminal by dynamically transmitting a downlink control command every time interval or every several time intervals in the two symbols that send the downlink control information or the two symbols that send the uplink grant in the two symbols that send the downlink control information.

Similar to the first and second embodiments, in this embodiment, the uplink grants sent on the two symbols are mapped to the downlink control channel for transmission, and no downlink data is transmitted in the two symbols. FIG. 13 shows that the uplink grant is mapped to the downlink data channel for transmission, but there is no downlink data transmission in the downlink data channel for the uplink grant transmission of the two symbols. Fig. 14, Fig. 15, and Fig. 16 show the case when data is transmitted in two symbols for transmitting an uplink grant. The uplink grant portion transmitted on the two symbols given in FIG. 7 associated with the present embodiment may also be transmitted in any of the manners of FIG. 13, FIG. 14, FIG. 15, or FIG.

Similar to the first and second embodiments, in this embodiment, the uplink control information including the HARQ feedback transmitted on the two symbols is mapped to the uplink control channel for transmission, and there is no uplink data transmission in the two symbols. FIG. 9 shows that the uplink control information including the HARQ feedback is mapped to the uplink data channel for transmission, but there is no uplink data transmission in the uplink data channel for the uplink control information transmission of the two symbols. Fig. 10, Fig. 11, and Fig. 12 show the case where data is transmitted in two symbols for transmitting uplink control information. The uplink control information portion transmitted on the two symbols given in FIG. 7 related to the present embodiment may also adopt any one of FIG. 9, FIG. 10, FIG. 11, or FIG. send. In addition, the uplink control information sent on the two symbols may include an uplink scheduling request, where the terminal requests the uplink resource allocation from the base station, and the uplink control information including the scheduling request is sent in the uplink control channel or sent in the uplink data channel.

Embodiment 4

Figure 8 is a schematic diagram of another signal transmission in accordance with the TDD method using the disclosed method. The base station first sends the downlink control information on the first two symbols, and then sends the downlink data. Before transmitting the downlink data, the downlink reference signal for downlink data demodulation needs to be sent, and the downlink reference signal used for demodulation is on one symbol. The downlink data is sent on the 5 symbols, and the uplink grant is sent on the 2 symbols after the downlink data is sent. The base station has a protection after the downlink transmission part sends the downlink control information, the downlink reference signal, the downlink data, and the uplink authorization. The interval (GP) is 2 symbols. In the 2 symbols, the base station neither transmits data nor receives data, and then the base station receives the uplink reference signal, the uplink control information, and the uplink data, and the uplink reference signal is first received, and is used for The uplink data is demodulated, and the uplink control information transmitted on the two symbols is inserted into the middle of the uplink data for reception.

In this embodiment, it is assumed that the time interval is 0.25 ms, including 20 OFDM symbols. The length of the downlink transmitting part, the GP, and the uplink sending part in the 0.25 ms interval is 10 symbols, 2 symbols, and 8 symbols, respectively, and the length of each part can be semi-statically configured to the terminal through the system broadcast message or through protocol agreement. No need to notify, but also by sending downlink control information The downlink control command is dynamically transmitted every time interval or every several time intervals in the two symbols to notify the terminal of the change in the length ratio of each part.

In this embodiment, the downlink control information is sent on two symbols, and the uplink grant is sent on two symbols after the downlink data is sent, the number of symbols used for downlink control information transmission, the number of symbols used for uplink grant transmission, and the uplink grant. The location in the downlink transmission part may be semi-statically configured to the terminal through the system broadcast message or through protocol agreement without notification, or may be dynamic every time interval or every several time intervals in the 2 symbols for transmitting the downlink control information. Send a downlink control command to notify the terminal. In this embodiment, the uplink control information is inserted into one symbol and the uplink data is transmitted, and then transmitted on two symbols. The number of symbols used for uplink control information transmission and the position in the uplink transmission portion may be semi-statically transmitted through the system broadcast message. The terminal can be configured to the terminal or through the protocol without notification. The terminal can also be used to dynamically send the downlink control command to notify the terminal in each of the two symbols that send the downlink control information or the two symbols that send the uplink grant. .

Similar to the first, second, and third embodiments, in this embodiment, the uplink grants sent on the two symbols are mapped to the downlink control channel for transmission, and no downlink data is transmitted in the two symbols. FIG. 13 shows that the uplink grant is mapped to the downlink data channel for transmission, but there is no downlink data transmission in the downlink data channel for the uplink grant transmission of the two symbols. Fig. 14, Fig. 15, and Fig. 16 show the case when data is transmitted in two symbols for transmitting an uplink grant. The uplink grant portion transmitted on the two symbols given in FIG. 8 related to the present embodiment may also be transmitted in any of the manners of FIG. 13, FIG. 14, FIG. 15, or FIG.

Similar to the first, second, and third embodiments, in this embodiment, the uplink control information including the HARQ feedback transmitted on the two symbols is mapped to the uplink control channel for transmission, and there is no uplink data transmission in the two symbols. FIG. 9 shows that the uplink control information including the HARQ feedback is mapped to the uplink data channel for transmission, but there is no uplink data transmission in the uplink data channel for the uplink control information transmission of the two symbols. Fig. 10, Fig. 11, and Fig. 12 show the case where data is transmitted in two symbols for transmitting uplink control information. The uplink control information portion transmitted on the two symbols given in FIG. 8 related to the present embodiment may also be transmitted in any one of FIG. 9, FIG. 10, FIG. 11, or FIG. In addition, the uplink control information sent on the two symbols may include an uplink scheduling request, where the terminal requests the uplink resource allocation from the base station, and the uplink control information including the scheduling request is in the uplink control. The system transmits or transmits in the uplink data channel.

Embodiment 5

Figure 18 is a schematic illustration of another signal transmission in accordance with the FDD method using the disclosed method. The base station sends the downlink control information on the first two symbols at the downlink frequency point, and then sends the downlink control information, and before transmitting the downlink data, the downlink reference signal for downlink data demodulation needs to be sent, for The demodulated downlink reference signal is transmitted on one symbol, the downlink data transmission is transmitted on seven symbols, and the uplink grant is inserted in the middle of the downlink data and transmitted on two symbols. After a period of time, the base station starts to receive the n+1th uplink transmission part at the uplink frequency point, and the uplink reference signal is first received for uplink data demodulation, and the uplink control information sent on the two symbols is inserted into the uplink. Data is received in the middle.

In this embodiment, the downlink data part and the downlink control information indicating the downlink data allocation are located in the same nth downlink transmission part, that is, the downlink control information sent on the first two symbols indicates that the downlink control information is sent on the next seven symbols. The allocation of downlink data. The downlink data part and the uplink control information for performing HARQ feedback on the downlink data are respectively located in the nth downlink sending part and the n+1th uplink sending part, that is, sent in 2 symbols in the n+1th uplink sending part. The uplink control information including the HARQ feedback performs fast HARQ feedback on the downlink data in the nth downlink transmission part. In addition, in this embodiment, the uplink data and the uplink grant indicating the uplink data allocation are respectively located in the n+1th uplink sending part and the nth downlink sending part, that is, in the nth downlink sending part. The uplink grant sent on the symbol indicates the allocation of the uplink data transmitted on the 8 symbols in the n+1th uplink transmitting portion. In this embodiment, the base station needs to start receiving uplink control information at an offset after the end of the nth downlink transmission part, so that the uplink control information and the preparation downlink can be processed in the time of the (n+1)th downlink transmission part. Scheduling, so that retransmission can be performed in the n+2th downlink transmission part.

In order to utilize the latest channel state information in the n+2th downlink transmission part transmission, at least one of CQI, RI and PMI will also be in the uplink control information of the 2 symbols of the (n+1)th uplink transmission part. It is transmitted so that the base station receives the information in advance and performs processing, so that the n+2th downlink transmitting portion can perform downlink data transmission based on the channel state information.

In this embodiment, it is assumed that the downlink transmission portion is 0.25 ms, including 12 OFDM symbols. Downlink control information is sent on 2 symbols, and uplink grant is inserted into 5 symbols for downlink data transmission. After being transmitted on two symbols, the number of symbols used for downlink control information transmission, the number of symbols used for uplink grant transmission, and the position of the uplink grant in the downlink transmission portion may be semi-statically configured to the terminal or through the protocol through the system broadcast message. The terminal does not need to be notified, and the terminal can be notified by dynamically transmitting a downlink control command every time interval or every several time intervals in the two symbols for transmitting the downlink control information. In this embodiment, the uplink control information is inserted into one symbol and the uplink data is transmitted, and then transmitted on two symbols. The number of symbols used for uplink control information transmission and the position in the uplink transmission portion may be semi-statically transmitted through the system broadcast message. The terminal can be configured to the terminal or through the protocol without notification. The terminal can also be used to dynamically send the downlink control command to notify the terminal in each of the two symbols that send the downlink control information or the two symbols that send the uplink grant. .

Similar to the first, second, third, and fourth embodiments, in this embodiment, the uplink grants sent on the two symbols are mapped to the downlink control channel for transmission, and no downlink data is transmitted in the two symbols. FIG. 13 shows that the uplink grant is mapped to the downlink data channel for transmission, but there is no downlink data transmission in the downlink data channel for the uplink grant transmission of the two symbols. Fig. 14, Fig. 15, and Fig. 16 show the case when data is transmitted in two symbols for transmitting an uplink grant. The uplink grant portion transmitted on the two symbols given in FIG. 18 related to the present embodiment may also be transmitted in any of the manners of FIG. 13, FIG. 14, FIG. 15, or FIG.

Similar to the first, second, third, and fourth embodiments, in this embodiment, the uplink control information including the HARQ feedback transmitted on the two symbols is mapped to the uplink control channel for transmission, and no uplink data is transmitted in the two symbols. FIG. 9 shows that the uplink control information including the HARQ feedback is mapped to the uplink data channel for transmission, but there is no uplink data transmission in the uplink data channel for the uplink control information transmission of the two symbols. Fig. 10, Fig. 11, and Fig. 12 show the case where data is transmitted in two symbols for transmitting uplink control information. The uplink control information portion transmitted on the two symbols given in FIG. 18 related to the present embodiment may also be transmitted in any one of FIG. 9, FIG. 10, FIG. 11, or FIG. In addition, the uplink control information sent on the two symbols may include an uplink scheduling request, where the terminal requests the uplink resource allocation from the base station, and the uplink control information including the scheduling request is sent in the uplink control channel or sent in the uplink data channel.

In addition, in FIG. 18, the position of the downlink data inserted into the nth downlink transmission part and the uplink control information including the HARQ feedback are inserted into the n+1th uplink by reasonably setting the uplink grant. The location in the uplink data of the transmitting part may be such that the start time of the n+1th uplink transmitting part is aligned with the starting time of the n+1th downlink transmitting part, and at the same time, for the uplink and downlink, the nth The uplink or downlink transmission part performs new transmission, and the n+2 uplink or downlink transmission part performs retransmission.

For the FDD system to use the method of the present disclosure for signal transmission, the downlink transmission part and the uplink transmission part may also adopt a transmission method similar to the downlink transmission part and the uplink transmission part given in the schematic diagrams of FIG. 6, FIG. 7, and FIG.

In the foregoing Embodiments 1 to 5, the downlink reference signal used for downlink control information or downlink data demodulation is transmitted on 0, 1 or 2 symbols of 2 symbols for performing downlink control information transmission, and is used for uplink. The downlink reference signal for demodulation of the authorization or downlink data is transmitted on 0, 1 or 2 symbols of the 2 symbols for uplink grant transmission, and the uplink reference signal for uplink control information or uplink data demodulation is uplinked. 0, one or more symbols of the two symbols transmitted by the control information are transmitted. In addition to the reference signal design for demodulation described in the above embodiments, it is not excluded that other reference signals are designed for downlink control information, uplink grant, and uplink control information demodulation, such as transmitting a reference before the associated control information. signal.

FIG. 20 is a schematic flowchart 1 of a signal transmission method according to an embodiment of the present disclosure. As shown in FIG. 20, the method includes:

Step 201: The base station sends a downlink sending part, where the downlink sending part includes at least downlink control information, downlink data, and an uplink grant; the downlink control information is used to indicate downlink data allocation, and the uplink grant is used to indicate uplink data allocation. The downlink control information and the uplink grant are sent on different symbols.

The downlink transmitting part is composed of p OFDM symbols, and the downlink control information is sent on one or more symbols of the first i OFDM symbols;

The uplink grant is sent on consecutive j OFDM symbols after the first i OFDM symbols;

The downlink data is transmitted on at least one of the first i OFDM symbols and the pij OFDM symbols except the consecutive j OFDM symbols, where 0<i<p, 0<j<p ,pij>0,i,j,p is a positive integer.

The method of this embodiment may further include:

Step 202: The base station sends a downlink transmission part consisting of p OFDM symbols, and then receives an uplink transmission part consisting of n OFDM symbols, and n is a positive integer greater than 0, and the uplink transmission part is at least one guard interval. Including uplink control information and uplink data;

In the above solution, the receiving, by the base station, the uplink sending part that is sent by the terminal and consisting of n OFDM symbols may include:

The uplink control information includes HARQ feedback for downlink data, and the HARQ feedback is received on a predetermined k symbols, where the k symbols are located before the last h OFDM symbols of the uplink sending part, where 0<k< n, 0 < h < n, k + h <= n, k, h is a positive integer;

In the above solution, the uplink grant is sent on consecutive j OFDM symbols after the first i symbols, and may include at least one of the following five situations:

In the foregoing solution, receiving the HARQ feedback on a predetermined k symbols may include the following At least one of five things:

In the above solution, the downlink data and the downlink control information indicating the downlink data allocation may be located in the same downlink sending part.

In the above solution, the downlink data and the uplink control information for performing HARQ feedback on the downlink data may be located in the same time interval.

In the above solution, the uplink data and the uplink grant indicating the uplink data allocation may be located in the same time interval.

In the above solution, the uplink control information may include channel state information, and the channel state information is received on a predetermined c symbols, where the c symbols are located before the last b OFDM symbols of the uplink sending part, where 0 <c<n, 0<b<n, c+b<=n, c, b is a positive integer, and the channel state information includes a channel quality indicator (CQI), a precoding matrix indication (PMI), and a rank indication (RI) One or more of them.

In the above solution, the lengths of the p OFDM symbols for the downlink transmission part, the n OFDM symbols for the uplink transmission part, and the guard interval may be semi-statically configured by the base station through the system broadcast message, or by being located in the One or more symbols in the first i OFDM symbols The downlink control commands are dynamically configured and notified to the terminal, or agreed upon by a contract rule without notification.

In the above solution, the value of i in the first i OFDM symbols, the value of j in the consecutive j OFDM symbols, and the position of j OFDM symbols in the downlink sending part may be broadcast by the base station through the system. The semi-static configuration is notified to the terminal, or dynamically configured by a downlink control command located on one or more symbols in the first i OFDM symbols, or by a convention rule without notification.

In the above solution, the value of k in the predetermined k OFDM symbols and the position of the k OFDM symbols in the uplink transmitting part may be notified to the terminal by the base station through a system broadcast message semi-static configuration, or by A downlink control command on one or more of the first i OFDM symbols is notified by a downlink control command located in the consecutive j OFDM symbols, or by an appointment rule without notification.

In the above solution, the value of c in the c OFDM symbols and the position of the c OFDM symbols in the uplink sending part may be notified to the terminal by the base station through a system broadcast message semi-static configuration, or by being located before the Downlink control commands on one or more of the i OFDM symbols are either notified by a downlink control command located in the consecutive j OFDM symbols, or by a convention rule without notification.

In the above solution, the number of symbols used for at least the downlink control information transmission before the configured or agreed j consecutive symbols may have a minimum value.

In the above solution, the minimum value may be determined according to a processing time of the uplink data and a preparation time of the uplink grant and a length of each OFDM symbol within the time interval.

In the above solution, the number h of symbols after the configured or agreed k OFDM symbols may have a minimum value.

In the foregoing solution, the minimum value may be determined according to a processing time of the uplink control information, a preparation time of the downlink scheduling, and a length of each OFDM symbol within the time interval.

FIG. 21 is a second schematic flowchart of a signal transmission method according to an embodiment of the present disclosure. As shown in FIG. 21, the method includes:

Step 211: The terminal receives a downlink sending part sent by the base station, where the downlink sending part The downlink control information is used to indicate downlink data distribution, the uplink control information is used to indicate downlink data allocation, and the uplink control information and the uplink authorization are in different symbols. Send on.

The downlink transmitting part is composed of p OFDM symbols; and the downlink control information is received on one or more symbols of the first i symbols;

Receiving the uplink grant on one or more of the consecutive j symbols following the first i symbols;

Receiving the downlink data on at least one of the first i symbols and the pij OFDM symbols except the consecutive j symbols, where 0<i<p,0<j<p,pij >0,i,j,p is a positive integer.

In the above solution, the method may further include:

Step 212: The terminal receives the downlink transmission part consisting of p OFDM symbols sent by the base station, and then sends an uplink transmission part consisting of n OFDM symbols, where n is a positive integer greater than 0, and the uplink sending part is at least one positive integer. Including uplink control information and uplink data;

In the foregoing solution, the terminal sends an uplink sending part that is composed of n OFDM symbols, and may include:

In the above solution, receiving the uplink grant on consecutive j OFDM symbols after the first i symbols may include at least one of the following four situations:

In the foregoing solution, the HARQ feedback is sent on a predetermined k symbols, and may include at least one of the following four situations:

In the foregoing solution, the uplink control information may include channel state information, where the channel state information is sent on a predetermined c symbols, where the c symbols are located before a last b OFDM symbols of the uplink sending part, where <c<n, 0<b<n, c+b<=n, c, b is a positive integer, and the channel state information includes one or more of CQI, PMI, and RI.

In the above solution, the lengths of the p OFDM symbols for the downlink transmission part, the n OFDM symbols for the uplink transmission part, and the guard interval may be semi-statically configured by the base station through the system broadcast message, or by being located in the The downlink control command on one or more of the first i OFDM symbols is dynamically configured to notify the terminal, or by a contract rule convention without notification.

In the above solution, the value of i in the first i OFDM symbols, the value of j in the consecutive j OFDM symbols, and the position of the j OFDM symbols in the downlink sending part may be broadcast by the base station through the system. The semi-static configuration is notified to the terminal, or dynamically configured by a downlink control command located on one or more symbols in the first i OFDM symbols, or by a convention rule without notification.

In the above solution, the value of k in the predetermined k symbols and the position of the k OFDM symbols in the uplink sending part may be notified to the terminal by the base station through a system broadcast message semi-static configuration, or by being located in the Downlink control commands on one or more of the first i OFDM symbols are either notified by a downlink control command located in the consecutive j OFDM symbols, or by a convention rule without notification.

FIG. 22 is a first schematic structural diagram of a signal transmission apparatus according to an embodiment of the present disclosure. As shown in FIG. 22, the signal transmission apparatus of this embodiment is applied to a base station, and the signal transmission apparatus includes:

The first transmission unit 221 is configured to send a downlink sending part, where the downlink sending part includes at least downlink control information, downlink data, and an uplink grant, and the downlink control information is used to indicate downlink data allocation, where the uplink grant is used for Instructing uplink data allocation; the downlink control information and the uplink grant are sent on different symbols.

The downlink transmitting part is composed of p OFDM symbols; the downlink control information is sent on one or more symbols of the first i OFDM symbols;

In the foregoing solution, the first transmission unit 221 may be further configured to send, by using a downlink transmission part that is composed of p OFDM symbols, an uplink transmission part that is sent by the terminal and is composed of n OFDM symbols. n is a positive integer greater than 0, and the uplink sending part includes at least uplink control information and uplink data;

It will be understood by those skilled in the art that the implementation functions of the units in the signal transmission apparatus shown in FIG. 22 can be understood by referring to the related description of the foregoing signal transmission method.

FIG. 23 is a schematic structural diagram of a structure of a signal transmission apparatus according to an embodiment of the present disclosure. As shown in FIG. 23, the signal transmission apparatus of this embodiment is applied to a terminal, and the signal transmission apparatus includes:

The second transmission unit 231 is configured to receive a downlink sending part that is sent by the base station, where the downlink sending part includes at least downlink control information, downlink data, and an uplink grant, where the downlink control information is used to indicate downlink data allocation, where the uplink is performed. Authorization is used to indicate uplink data allocation; the downlink control information and the uplink grant are sent on different symbols.

The downlink transmitting part is composed of p orthogonal frequency division multiplexing OFDM symbols; and receiving the downlink control information on one or more symbols of the first i symbols;

Receiving the uplink grant on consecutive j symbols subsequent to the first i symbols;

P-i-j OFDM symbols at least in the first i symbols and the consecutive j symbols The downlink data is received on one or more symbols in which 0<i<p, 0<j<p, p-i-j>0, i, j, p are positive integers.

In the above solution, the second transmission unit 231 may be further configured to: after receiving a downlink transmission part consisting of p OFDM symbols sent by the base station, send an uplink transmission part consisting of n OFDM symbols at a guard interval, where n is a positive integer greater than 0, and the uplink sending part includes at least uplink control information and uplink data;

In the above solution, the value of i in the first i OFDM symbols, the value of j in the consecutive j OFDM symbols, and the position of the j OFDM symbols in the downlink sending part may be broadcast by the base station through the system. Semi-static configuration notification to the terminal, or by being located in the first i Downlink control commands on one or more symbols in the OFDM symbol are dynamically configured or agreed upon by a convention rule without notification.

It will be understood by those skilled in the art that the implementation functions of the units in the signal transmission apparatus shown in FIG. 23 can be understood by referring to the related description of the foregoing signal transmission method.

The signal transmission method provided by the embodiment of the present disclosure dynamically adjusts the ratio of the DL data and the UL data portion within the time interval X to meet the requirements of different uplink and downlink traffic. Since the downlink data and the uplink data transmission are simultaneously supported in the time interval X, even if the uplink and downlink traffic ratios are changed, the retransmission can be immediately performed in the next time interval X, and the retransmission timing relationship is simple, and the uplink and downlink are simultaneously low. The characteristics of time delay.

The selection of the time interval X length needs to balance the overhead occupied by the control channel and the GP in the X and the delay requirement of the uplink and downlink services. If the delay requirement is high, that is, to ensure a lower delay, the number of symbols of the time interval X can be appropriately reduced, and the control channel and the GP overhead are increased. In the case where the delay requirement is relaxed, the length of the time interval X can be increased, that is, the proportion of DL data and UL data is increased, thereby reducing the control channel and GP overhead.

In addition, as shown in FIG. 5, the present disclosure can reduce the overhead of the GP by inserting downlink data transmission between the uplink grant and the uplink data and inserting the uplink data between the downlink data and the uplink feedback, that is, part of the time when the uplink data is sent. The terminal can perform downlink data processing and prepare HARQ information. When the processing is completed, the HARQ information is fed back. During a part of sending the downlink data, the terminal can detect and process the uplink authorization and prepare the uplink data, which is performed after the GP. Uplink data is sent. With appropriate insertion data transmission, self-contained feedback within time interval X can be more effectively implemented.

As can be seen in FIG. 19, by the method provided by the present disclosure, the downlink and uplink data are transmitted in combination with the structure in which the following row transmission is centered in the time interval X and the structure in which the above-mentioned row transmission is centered in the time interval X. In the case of ensuring the same effective data transmission, the GP overhead is reduced by more than half, and the transmission efficiency is significantly improved.

The downlink transmission part and the uplink transmission part signal transmission method of the present disclosure can be used not only in the licensed frequency band, but also in the unlicensed frequency band.

Further, the present disclosure provides a computer readable medium storing a signal transmission program that implements a signal transmission method at the base station side when executed by a processor.

Further, the present disclosure provides a computer readable medium storing a signal transmission program that implements a signal transmission method on the terminal side when executed by a processor.

Those skilled in the art will appreciate that embodiments of the present disclosure can be provided as a method, system, or computer program product. Accordingly, the present disclosure may take the form of a hardware embodiment, a software embodiment, or a combination of software and hardware aspects. Moreover, the present disclosure may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) including computer usable program code.

The present disclosure is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the present disclosure. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

Those of ordinary skill in the art will appreciate that all or some of the steps, systems, and functional blocks/units of the methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be composed of several physical The components work together. Some or all of the components may be implemented as software executed by a processor, such as a digital signal processor or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software can be distributed in calculations On a machine-readable medium, a computer-readable medium can include a computer storage medium (or non-transitory medium) and a communication medium (or transitory medium). As is well known to those of ordinary skill in the art, the term computer storage medium includes volatile and nonvolatile, implemented in any method or technology for storing information, such as computer readable instructions, data structures, program modules or other data. Sex, removable and non-removable media. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disc (DVD) or other optical disc storage, magnetic cartridge, magnetic tape, magnetic disk storage or other magnetic storage device, or may Any other medium used to store the desired information and that can be accessed by the computer. Moreover, it is well known to those skilled in the art that communication media typically includes computer readable instructions, data structures, program modules, or other data in a modulated data signal, such as a carrier wave or other transport mechanism, and can include any information delivery media. .

The above description is only for the preferred embodiments of the present disclosure, and is not intended to limit the scope of the disclosure.

Industrial applicability

Embodiments of the present disclosure provide a signal transmission method and apparatus, which provide a fixed HARQ RTT and improve transmission efficiency in a time interval X by providing a new TDD transmission structure.

Claims

A signal transmission method includes:

The base station sends a downlink sending part, where the downlink sending part includes at least downlink control information, downlink data, and an uplink grant; the downlink control information is used to indicate downlink data allocation, and the uplink grant is used to indicate uplink data allocation; The downlink control information and the uplink grant are sent on different symbols.
The signal transmission method according to claim 1, wherein said downlink transmission portion is composed of p orthogonal frequency division multiplexing OFDM symbols, and said downlink control information is located on one or more symbols of the first i OFDM symbols Transmitting; the uplink grant is sent on consecutive j OFDM symbols after the first i OFDM symbols; the downlink data is at least pij outside the first i OFDM symbols and the consecutive j OFDM symbols Transmitted on one or more symbols in the OFDM symbol, where 0 < i < p, 0 < j < p, pij > 0, i, j, p are positive integers.
The signal transmission method according to claim 2, further comprising:

The base station transmits a downlink transmission part consisting of p OFDM symbols and then transmits a downlink transmission part consisting of n OFDM symbols, the n is a positive integer greater than 0, and the uplink transmission part includes at least an uplink control. Information and uplink data;

The downlink sending part, the guard interval, and the uplink sending part form a time interval, and the time interval length is less than or equal to 4 milliseconds ms.
The signal transmission method according to claim 3, wherein the base station receives an uplink transmission part consisting of n OFDM symbols transmitted by the terminal, and includes:

The uplink control information includes hybrid automatic repeat request (HARQ feedback) for downlink data, and the HARQ feedback is received on a predetermined k symbols, where the k symbols are located before the last h OFDM symbols of the uplink sending part, where , 0<k<n, 0<h<n, k+h<=n, k, h are positive integers;

The uplink data is received on one or more of the n-k symbols other than the predetermined k symbols.
The signal transmission method according to claim 2, wherein said uplink grant is located in said Transmitted on consecutive j OFDM symbols after the first i symbols, including at least one of the following five cases:

The downlink data is not included in the j OFDM symbols, and the uplink grant is sent on the downlink control channel;

The downlink data is not included in the j OFDM symbols, and the uplink grant is sent on the downlink data channel;

The j OFDM symbols include downlink data, the uplink grant is sent on a downlink control channel, the downlink data is sent on a downlink data channel, and the downlink control channel and the downlink data channel are frequency division multiplexed;

The j OFDM symbols include downlink data, and the uplink grant and the downlink data are sent on a downlink data channel in a time-frequency multiplex manner;

The j OFDM symbols include downlink data, the uplink grant is sent on a downlink control channel, and the uplink grant and the downlink data are sent on a downlink data channel in a time-frequency multiplex manner, the downlink control channel Frequency division multiplexing with the downlink data channel.
The signal transmission method according to claim 4, wherein the HARQ feedback is received on a predetermined k symbols, including at least one of the following five cases:

The uplink data is not included in the k OFDM symbols, and the HARQ feedback is received on an uplink control channel;

The uplink data is not included in the k OFDM symbols, and the HARQ feedback is received on an uplink data channel;

The k OFDM symbols include uplink data, receive the HARQ feedback on an uplink control channel, receive the uplink data on an uplink data channel, and perform frequency division multiplexing on the uplink control channel and the uplink data channel;

The k OFDM symbols include uplink data, and the HARQ feedback and the uplink data are received on an uplink data channel, and the HARQ feedback and the uplink data are time-frequency multiplexed;

The k OFDM symbols include uplink data, the HARQ feedback is received on an uplink control channel, the HARQ feedback and the uplink data are received on an uplink data channel, and the HARQ feedback and the uplink data are time-frequency-transmitted. Multiplexing, the uplink control channel and the uplink number Frequency division multiplexing is performed according to the channel.
The signal transmission method according to claim 1, wherein the downlink data and the downlink control information indicating the downlink data allocation are located in the same downlink transmission portion.
The signal transmission method according to claim 4, wherein the downlink data and the uplink control information for performing HARQ feedback on the downlink data are located in the same time interval.
The signal transmission method according to claim 3, wherein the uplink data and the uplink grant indicating the uplink data allocation are located in the same time interval.
The signal transmission method according to claim 3, wherein said uplink control information includes channel state information, said channel state information is received on a predetermined c symbols, said c symbols being located at a last b of said uplink transmitting portion Before the OFDM symbols, where 0<c<n, 0<b<n, c+b<=n, c, b are positive integers, the channel state information includes a channel quality indicator CQI, a precoding matrix indicating PMI, and The rank indicates one or more of the RIs.
The signal transmission method according to claim 3, wherein said p OFDM symbols for a downlink transmission portion, said n OFDM symbols for an uplink transmission portion, and a length of said guard interval are broadcast by a base station through a system The message is semi-statically configured, or dynamically configured and notified to the terminal by a downlink control command located on one or more symbols in the first i OFDM symbols, or by a predetermined rule convention without notification.
The signal transmission method according to claim 2, wherein a value of i in the first i OFDM symbols, a value of j in the consecutive j OFDM symbols, and j OFDM symbols are in the downlink transmission portion The location is notified by the base station to the terminal via a semi-static configuration of the system broadcast message, or dynamically by a downlink control command located on one or more symbols in the first i OFDM symbols, or by a predetermined rule convention without notification.
The signal transmission method according to claim 4, wherein a value of k in said predetermined k OFDM symbols and a position of k OFDM symbols in said uplink transmitting portion are semi-statically configured by a base station through a system broadcast message Notifying the terminal, either by a downlink control command located on one or more symbols in the first i OFDM symbols or by a downlink control command notification located in the consecutive j OFDM symbols, or by a predetermined rule convention Notice.
The signal transmission method according to claim 12, wherein said configuration or agreement The number of symbols used for at least the downlink control information transmission before the j consecutive symbols has a minimum value.
The signal transmission method according to claim 14, wherein the minimum value is determined according to a processing time of the uplink data and a preparation time of the uplink grant and a length of each OFDM symbol within the time interval.
The signal transmission method according to claim 13, wherein the number h of symbols after said configured or agreed k OFDM symbols has a minimum value.
The signal transmission method according to claim 16, wherein the minimum value is determined according to a processing time of the uplink control information and a preparation time of the downlink scheduling and a length of each OFDM symbol within the time interval.
A signal transmission method includes:

The terminal receives the downlink sending part sent by the base station, where the downlink sending part includes at least downlink control information, downlink data, and an uplink grant; the downlink control information is used to indicate downlink data allocation, and the uplink grant is used to indicate uplink data allocation. The downlink control information and the uplink grant are sent on different symbols.
The signal transmission method according to claim 18, wherein said downlink transmission portion is composed of p orthogonal frequency division multiplexing OFDM symbols; said downlink control information is received on one or more symbols of the first i symbols Receiving the uplink grant on one or more of consecutive j symbols following the first i symbols; at least the first i symbols and the pij OFDM symbols outside the consecutive j symbols The downlink data is received on one or more symbols in which 0<i<p, 0<j<p, pij>0, i, j, p are positive integers.
The signal transmission method according to claim 19, further comprising:

After receiving the downlink transmission part consisting of p OFDM symbols sent by the base station, the terminal transmits an uplink transmission part consisting of n OFDM symbols, and n is a positive integer greater than 0, and the uplink transmission part includes at least uplink control. Information and uplink data;

The downlink sending part, the guard interval, and the uplink sending part form a time interval, and the time interval length is less than or equal to 4 milliseconds ms.
The signal transmission method according to claim 20, wherein the terminal transmits an uplink transmission part composed of n OFDM symbols, including:

The uplink control information includes hybrid automatic repeat request HARQ feedback for downlink data, where the HARQ feedback is sent on one or more symbols of a predetermined k symbols, and the k symbols are located at the last end of the uplink sending part. Before h OFDM symbols, where 0<k<n, 0<h<n, k+h<=n, k, h are positive integers;

The uplink data is transmitted on at least one of the n-k symbols outside the k symbols.
The signal transmission method according to claim 19, wherein the uplink grant is received on consecutive j OFDM symbols subsequent to the first i symbols, including at least one of the following four cases:

The downlink data is not included in the j OFDM symbols, and the uplink grant is received on the downlink control channel;

The downlink data is not included in the j OFDM symbols, and the uplink grant is received on the downlink data channel;

The j OFDM symbols include downlink data, receive the uplink grant on a downlink control channel, receive the downlink data on a downlink data channel, and perform frequency division multiplexing on the downlink control channel and the downlink data channel;

The j OFDM symbols include downlink data, and the uplink grant and the downlink data are received on a downlink data channel, and the uplink grant and the downlink data are time-frequency multiplexed.
The signal transmission method according to claim 21, wherein said HARQ feedback is transmitted on a predetermined k symbols, including at least one of the following four cases:

The uplink data is not included in the k OFDM symbols, and the HARQ feedback is sent on an uplink control channel;

The uplink data is not included in the k OFDM symbols, and the HARQ feedback is sent on the uplink data channel;

The k OFDM symbols include uplink data, the HARQ feedback is sent on an uplink control channel, the uplink data is sent on an uplink data channel, and the uplink control channel and the uplink data channel are frequency division multiplexed;

The k OFDM symbols include uplink data, the HARQ feedback and the uplink number It is transmitted on the uplink data channel in a time-frequency multiplexed manner.
The signal transmission method according to claim 18, wherein the downlink data and the downlink control information indicating the downlink data allocation are located in the same downlink transmission portion.
The signal transmission method according to claim 21, wherein the downlink data and the uplink control information for performing HARQ feedback on the downlink data are located in the same time interval.
The signal transmission method according to claim 20, wherein the uplink data and the uplink grant indicating the uplink data allocation are located in the same time interval.
The signal transmission method according to claim 20, wherein said uplink control information comprises channel state information, said channel state information being transmitted on a predetermined c symbols, said c symbols being located at a last b of said uplink transmitting portion Before the OFDM symbols, where 0<c<n, 0<b<n, c+b<=n, c, b are positive integers, the channel state information includes a channel quality indicator CQI, a precoding matrix indicating PMI, and The rank indicates one or more of the RIs.
The signal transmission method according to claim 20, wherein said p OFDM symbols for a downlink transmission portion, said n OFDM symbols for an uplink transmission portion, and a length of a guard interval are broadcast by a base station through a system half Static configuration, or dynamic configuration notification to the terminal via a downlink control command located on one or more of the first i OFDM symbols, or by a predetermined rule convention without notification.
The signal transmission method according to claim 19, wherein a value of i in said first i OFDM symbols, a value of j in said consecutive j OFDM symbols, and j OFDM symbols are in said downlink transmission portion The location is notified by the base station to the terminal via a semi-static configuration of the system broadcast message, or dynamically by a downlink control command located on one or more symbols in the first i OFDM symbols, or by a predetermined rule convention without notification.
The signal transmission method according to claim 21, wherein a value of k of said predetermined k symbols and a position of k OFDM symbols in said uplink transmitting portion are notified by a base station through a system broadcast message semi-static configuration To the terminal, either by a downlink control command located on one or more symbols in the first i OFDM symbols or by a downlink control command notification located in the consecutive j OFDM symbols, or by a predetermined rule convention without notification .
The signal transmission method according to claim 29, wherein said configuration or agreement The number of symbols used for at least the downlink control information transmission before the j consecutive symbols has a minimum value.
The signal transmission method according to claim 31, wherein said minimum value is determined according to a processing time for uplink data and a preparation time of an uplink grant and a length of each OFDM symbol within a time interval.
The signal transmission method according to claim 30, wherein the number h of symbols after said configured or agreed k OFDM symbols has a minimum value.
The signal transmission method according to claim 33, wherein said minimum value is determined according to a processing time of the uplink control information and a preparation time of the downlink scheduling and a length of each OFDM symbol within the time interval.
A signal transmission device is applied to a base station, and the signal transmission device includes:

The first transmission unit is configured to send a downlink sending part, where the downlink sending part includes at least downlink control information, downlink data, and an uplink grant; the downlink control information is used to indicate downlink data allocation, and the uplink grant is used to indicate Uplink data allocation; the downlink control information and the uplink grant are sent on different symbols.
The signal transmission apparatus according to claim 35, wherein said downlink transmission portion is composed of p orthogonal frequency division multiplexing OFDM symbols; said downlink control information is located on one or more symbols of the first i OFDM symbols Transmitting; the uplink grant is sent on consecutive j OFDM symbols after the first i OFDM symbols; the downlink data is at least pij outside the first i OFDM symbols and the consecutive j OFDM symbols Transmitted on one or more symbols in the OFDM symbol, where 0 < i < p, 0 < j < p, pij > 0, i, j, p are positive integers.
The signal transmission apparatus according to claim 36, wherein said first transmission unit is further configured to transmit a downlink transmission part consisting of p OFDM symbols after a guard interval, and the receiving terminal is composed of n OFDM symbols. The uplink transmitting part, where n is a positive integer greater than 0, and the uplink sending part includes at least uplink control information and uplink data;

The downlink sending part, the guard interval, and the uplink sending part form a time interval, and the time interval length is less than or equal to 4 milliseconds ms.
The signal transmission apparatus according to claim 36, wherein said uplink grant is transmitted on consecutive j OFDM symbols located after said first i symbols, including to the following five cases One less:

The downlink data is not included in the j OFDM symbols, and the uplink grant is sent on the downlink control channel;

The downlink data is not included in the j OFDM symbols, and the uplink grant is sent on the downlink data channel;

The j OFDM symbols include downlink data, the uplink grant is sent on a downlink control channel, the downlink data is sent on a downlink data channel, and the downlink control channel and the downlink data channel are frequency division multiplexed;

The j OFDM symbols include downlink data, and the uplink grant and the downlink data are sent on a downlink data channel in a time-frequency multiplex manner;

The j OFDM symbols include downlink data, the uplink grant is sent on a downlink control channel, and the uplink grant and the downlink data are sent on a downlink data channel in a time-frequency multiplex manner, the downlink control channel Frequency division multiplexing with the downlink data channel.
The signal transmission apparatus according to claim 36, wherein said downlink data and downlink control information indicating said downlink data allocation are located in the same downlink transmission portion.
The signal transmission apparatus according to claim 37, wherein said downlink data and uplink control information for performing hybrid automatic repeat request HARQ feedback on said downlink data are located in the same time interval.
The signal transmission apparatus according to claim 37, wherein said uplink data and an uplink grant indicating said uplink data allocation are located in the same time interval.
The signal transmission apparatus according to claim 36, wherein a value of i in said first i OFDM symbols, a value of j in said consecutive j OFDM symbols, and j OFDM symbols are in said downlink transmission portion The location is notified by the base station to the terminal via a semi-static configuration of the system broadcast message, or dynamically by a downlink control command located on one or more symbols in the first i OFDM symbols, or by a predetermined rule convention without notification.
A signal transmission device is applied to a terminal, and the signal transmission device includes:

a second transmission unit, configured to receive a downlink transmission part sent by the base station, where the downlink transmission part includes at least downlink control information, downlink data, and an uplink authorization; the downlink control information The information is used to indicate downlink data allocation, and the uplink grant is used to indicate uplink data allocation; the downlink control information and the uplink grant are sent on different symbols.
The signal transmission apparatus according to claim 43, wherein said downlink transmission portion is composed of p orthogonal frequency division multiplexing OFDM symbols; said downlink control information is received on one or more symbols of the first i symbols Receiving the uplink grant on consecutive j symbols following the first i symbols; at least one or more symbols in the pij OFDM symbols except the first i symbols and the consecutive j symbols The downlink data is received, where 0<i<p, 0<j<p, pij>0, i, j, p are positive integers.
The signal transmission apparatus according to claim 44, wherein the second transmission unit is further configured to receive a downlink transmission part consisting of p OFDM symbols transmitted by the base station, and then transmit by the OFDM symbol by a guard interval. The uplink transmitting part, where n is a positive integer greater than 0, and the uplink sending part includes at least uplink control information and uplink data;

The downlink sending part, the guard interval, and the uplink sending part form a time interval, and the time interval length is less than or equal to 4 milliseconds ms.
The signal transmission apparatus according to claim 44, wherein said uplink grant is received on consecutive j OFDM symbols subsequent to said first i symbols, including at least one of the following four cases:

The downlink data is not included in the j OFDM symbols, and the uplink grant is received on the downlink control channel;

The downlink data is not included in the j OFDM symbols, and the uplink grant is received on the downlink data channel;

The j OFDM symbols include downlink data, receive the uplink grant on a downlink control channel, receive the downlink data on a downlink data channel, and perform frequency division multiplexing on the downlink control channel and the downlink data channel;

The j OFDM symbols include downlink data, and the uplink grant and the downlink data are received on a downlink data channel, and the uplink grant and the downlink data are time-frequency multiplexed.
The signal transmission apparatus according to claim 43, wherein said downlink data and downlink control information indicating said downlink data allocation are located in the same downlink transmission portion.
The signal transmission apparatus according to claim 45, wherein said downlink data and uplink control information for performing hybrid automatic repeat request HARQ feedback on said downlink data are located in the same time interval.
The signal transmission apparatus according to claim 45, wherein said uplink data and an uplink grant indicating said uplink data allocation are located within the same time interval.
The signal transmission apparatus according to claim 44, wherein a value of i in said first i OFDM symbols, a value of j in said consecutive j OFDM symbols, and j OFDM symbols are in said downlink transmission portion The location is notified by the base station to the terminal via a semi-static configuration of the system broadcast message, or dynamically by a downlink control command located on one or more symbols in the first i OFDM symbols, or by a predetermined rule convention without notification.