CN107613568B

CN107613568B - Signal transmission method and device

Info

Publication number: CN107613568B
Application number: CN201610546495.7A
Authority: CN
Inventors: 陈冬雷; 柏钢; 夏树强; 左志松; 游爱民
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2016-07-12
Filing date: 2016-07-12
Publication date: 2021-12-14
Anticipated expiration: 2036-07-12
Also published as: WO2018010648A1; CN107613568A

Abstract

The invention discloses a signal transmission method and a device, comprising the following steps: a base station sends a downlink sending part consisting of p Orthogonal Frequency Division Multiplexing (OFDM) symbols, wherein the downlink sending part at least comprises downlink control information, downlink data and uplink authorization; the downlink control information is used for indicating downlink data allocation, and the uplink grant is used for indicating uplink data allocation; the downlink control information is sent on one or more symbols in the first i OFDM symbols; the uplink grant is sent on j continuous OFDM symbols after the first i OFDM symbols; and the downlink data is at least sent on one or more symbols in the first i OFDM symbols and the p-i-j OFDM symbols except the continuous j OFDM symbols, wherein 00, i, j, p is a positive integer.

Description

Signal transmission method and device

Technical Field

The present invention relates to the field of Long Term Evolution (LTE) and New Radio (NR) mobile communication networks, and in particular, to a method and an apparatus for transmitting a signal related to a frame structure.

Background

With the advent of new applications in industrial fields such as industrial automation and industrial control, telemedicine, smart grid, etc., higher demands are placed on wireless cellular communication, including lower latency and higher reliability. In order to meet the requirements of these Ultra-Reliable Low-delay Communications (URLLC, Ultra-Reliable and Low Latency Communications) services, 3GPP started the research of 5G mobile communication system, and indicated in the 3GPP tr38.913v0.3.0 requirement document that, for URLLC services, the delay is 0.5ms for downlink and uplink user planes, respectively, and the delay index is an average delay without high reliability requirements. For high reliability, the document indicates that the target of URLLC traffic is 99.999% of the probability of successfully transmitting a packet within 1 ms. In addition, for applications such as telemedicine, a rate of 300Mbps is also required to be satisfied.

In order to meet the low delay and high reliability index of URLLC service, 3GPP has proposed, in the aspect of 5G air interface frame structure, that a downlink data channel should have the capability of fast feedback and fast retransmission, and that uplink data transmission can be performed soon after receiving uplink grant. For the TDD communication scheme, two time domain structures need to be studied in a given time interval x (time interval x), one is a structure centered on downlink transmission, as shown in fig. 1, a downlink transmission part (downlink transmission part) includes downlink control (DL ctrl) and downlink data (DL data), an uplink transmission part (uplink transmission part) includes uplink control information (UL ctrl, uplink control), and a guard interval (GP) exists between the downlink transmission part and the uplink transmission part. Another is a structure centered on uplink transmission, as shown in fig. 2, a downlink transmission part (downlink transmission part) includes an uplink grant (UL grant), an uplink transmission part includes uplink data (UL data) and uplink control information, and a Guard Period (GP) exists between the downlink transmission part and the uplink transmission part.

When the two time domain structures are respectively used for downlink data transmission and uplink data transmission, along with the change of uplink and downlink flow requirements, the proportion of time intervals X of the two time domain structures is different in a specific time, which is similar to the difference of uplink and downlink proportion under a TDD frame structure in the existing LTE standard. For the increase of downlink traffic, when the proportion of time interval X centered on downlink transmission is increased, due to the influence of frame alignment time and retransmission time, a larger average time delay of uplink and downlink is inevitably brought. Similarly, for the increase of the uplink traffic, increasing the ratio of time interval X centered on uplink transmission will bring larger average time delay for downlink due to the influence of the frame alignment time and the retransmission time. That is, the delay of URLLC service will be affected by the change of the ratio of uplink and downlink traffic. Since the uplink and downlink delay requirements of URLLC service are both 0.5ms, this may result in that, in some proportions, the uplink and downlink delay requirements may not be satisfied simultaneously. In addition, the retransmission timing relationship will become more complex and fast retransmission is not possible.

In order to enable fast uplink retransmissions, 3GPP proposes to investigate whether it is necessary to introduce a GP after the uplink transmission, as shown in fig. 3 and 4. In fig. 3, a GP is introduced after uplink control information in time interval X centered on downlink transmission for processing uplink control information reception and preparing downlink retransmission scheduling, and in fig. 4, a GP is introduced after uplink data transmission for processing uplink data reception and preparing uplink retransmission scheduling in time interval X centered on uplink transmission. Obviously, introducing another GP after the uplink transmission will bring more overhead to the time interval X, which will significantly reduce the transmission efficiency. In addition, for the self-contained HARQ feedback or uplink data response, the GP in fig. 1 and 2 needs to reserve enough time for the UE to process the received downlink channel and prepare for the transmission of the uplink channel, and the overhead of the GP may be relatively large.

Disclosure of Invention

The invention aims to provide a signal transmission method and a signal transmission device, which are used for solving the technical problem that a large amount of overhead in time interval X reduces the transmission efficiency.

In order to solve the above technical problem, the present invention provides a signal transmission method, including:

a base station sends a downlink sending part consisting of p Orthogonal Frequency Division Multiplexing (OFDM) symbols, wherein the downlink sending part at least comprises downlink control information, downlink data and uplink authorization; the downlink control information is used for indicating downlink data allocation, and the uplink grant is used for indicating uplink data allocation;

the downlink control information is sent on one or more symbols in the first i OFDM symbols;

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

and the downlink data is at least sent on one or more symbols in the first i OFDM symbols and the p-i-j OFDM symbols except the continuous j OFDM symbols, wherein 00, i, j, p is a positive integer.

The method further comprises the following steps:

a base station transmits a downlink transmission part consisting of p OFDM symbols separated by a guard interval, receives an uplink transmission part consisting of n OFDM symbols transmitted by a terminal, wherein n is a positive integer greater than 0, and the uplink transmission part at least comprises uplink control information and uplink data;

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

The base station receives an uplink transmission part which is sent by a terminal and consists of n OFDM symbols, and the uplink transmission part comprises the following components:

the uplink control information comprises hybrid automatic repeat request (HARQ) feedback of downlink data, and the HARQ feedback is received on preset k symbols which are positioned before the last h OFDM symbols of the uplink transmission part, wherein 0< k < n, 0< h < n, k + h < (n), and k, h is a positive integer;

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

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

the j OFDM symbols do not comprise downlink data, and the uplink authorization is sent on a downlink control channel;

the j OFDM symbols do not comprise downlink data, and the uplink authorization is sent on a downlink data channel;

the j OFDM symbols comprise downlink data, the uplink authorization 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 subjected to frequency division multiplexing;

the j OFDM symbols comprise downlink data, and the uplink authorization and the downlink data are sent on a downlink data channel in a time-frequency multiplexing mode;

the j OFDM symbols comprise downlink data, the uplink authorization is sent on a downlink control channel, the uplink authorization and the downlink data are sent on a downlink data channel in a time-frequency multiplexing mode, and the downlink control channel and the downlink data channel are subjected to frequency division multiplexing.

Receiving the HARQ feedback on predetermined k symbols, including at least one of the following five cases:

the k OFDM symbols do not comprise uplink data, and the HARQ feedback is received on an uplink control channel;

the k OFDM symbols do not comprise uplink data, and the HARQ feedback is received on an uplink data channel;

the k OFDM symbols comprise uplink data, the HARQ feedback is received on an uplink control channel, the uplink data is received on an uplink data channel, and the uplink control channel and the uplink data channel are subjected to frequency division multiplexing;

the k OFDM symbols comprise uplink data, the HARQ feedback and the uplink data are received on an uplink data channel, and time-frequency multiplexing is carried out on the HARQ feedback and the uplink data;

the k OFDM symbols comprise uplink data, the HARQ feedback is received on an uplink control channel, the HARQ feedback and the uplink data are received on the uplink data channel, the HARQ feedback and the uplink data are subjected to time-frequency multiplexing, and the uplink control channel and the uplink data channel are subjected to frequency division multiplexing.

The downlink data and the downlink control information indicating the downlink data allocation are located in the same downlink transmission section.

The downlink data and the uplink control information for performing HARQ feedback on the downlink data are positioned in the same time interval.

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

The uplink control information includes channel state information, the channel state information is received on predetermined c symbols, the c symbols are located before the last b OFDM symbols of the uplink transmission part, where 0< c < n, 0< b < n, c + b < ═ n, c, b are positive integers, and the channel state information includes one or more of a channel quality indication CQI, a precoding matrix indication PMI, and a rank indication RI.

The length of the p OFDM symbols for the downlink transmission part, the length of the n OFDM symbols for the uplink transmission part and the length of the guard interval are configured semi-statically by a base station through system broadcast messages or dynamically configured and notified to a terminal through downlink control commands located on one or more symbols in the first i OFDM symbols, or are agreed by an agreed rule without notification.

And the values of i in the first i OFDM symbols, the values of j in the continuous j OFDM symbols and the positions of the j OFDM symbols in the downlink sending part are notified to a terminal by the base station through system broadcast message semi-static configuration or dynamically configured through downlink control commands on one or more symbols in the first i OFDM symbols, or are agreed by an agreed rule without notification.

And the values of k in the preset k OFDM symbols and the positions of the k OFDM symbols in the uplink sending part are notified to the terminal by the base station through system broadcast message semi-static configuration, or through a downlink control command on one or more symbols in the first i OFDM symbols or through a downlink control command in the continuous j OFDM symbols, or through an agreed rule without notification.

And the value of c in the c OFDM symbols and the positions of the c OFDM symbols in the uplink sending part are notified to the terminal by the base station through system broadcast message semi-static configuration, or through a downlink control command on one or more symbols in the first i OFDM symbols or through a downlink control command in the continuous j OFDM symbols, or through an agreed rule without notification.

At least the number of symbols used for the downlink control information transmission before the configured or agreed j consecutive symbols has a minimum value.

The minimum value is determined according to the processing time of the uplink data, the preparation time of the uplink authorization and the length of each OFDM symbol in the time interval.

The number of symbols h after the configured or agreed k OFDM symbols has a minimum value.

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

In order to solve the above technical problem, the present invention further provides a signal transmission method, including:

a terminal receives a downlink sending part which is sent by a base station and consists of p OFDM symbols, wherein the downlink sending part at least comprises downlink control information, downlink data and uplink authorization; 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 received on one or more symbols of the first i symbols;

receiving the uplink grant on one or more of consecutive j symbols after the first i symbols;

and receiving the downlink data at least on one or more symbols of p-i-j OFDM symbols except the first i symbols and the continuous j symbols, wherein 00, i, j, p is a positive integer.

The method further comprises the following steps:

a terminal receives a downlink transmission part which is composed of p OFDM symbols and is transmitted by a base station, and transmits an uplink transmission part which is composed of n OFDM symbols at an interval of a guard interval, wherein n is a positive integer which is larger than 0, and the uplink transmission part at least comprises uplink control information and uplink data;

The terminal sends an uplink sending part consisting of n OFDM symbols, and the uplink sending part comprises the following steps:

the uplink control information includes HARQ feedback for downlink data, where the HARQ feedback is sent on one or more symbols of predetermined k symbols, and 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, and k, h are positive integers;

and the uplink data is at least sent on one or more symbols in the n-k symbols except the k symbols.

Receiving the uplink grant on j consecutive OFDM symbols after the first i symbols, wherein the receiving includes at least one of the following four cases:

the j OFDM symbols do not comprise downlink data, and the uplink authorization is received on a downlink control channel;

the j OFDM symbols do not comprise downlink data, and the uplink authorization is received on a downlink data channel;

the j OFDM symbols comprise downlink data, the uplink authorization is received on a downlink control channel, the downlink data is received on a downlink data channel, and the downlink control channel and the downlink data channel are subjected to frequency division multiplexing;

and the j OFDM symbols comprise downlink data, the uplink authorization and the downlink data are received on a downlink data channel, and the uplink authorization and the downlink data are subjected to time-frequency multiplexing.

The HARQ feedback is sent on predetermined k symbols, and includes at least one of the following four cases:

the k OFDM symbols do not comprise uplink data, and the HARQ feedback is sent on an uplink control channel;

the k OFDM symbols do not comprise uplink data, and the HARQ feedback is sent on an uplink data channel;

the k OFDM symbols comprise 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 subjected to frequency division multiplexing;

the k OFDM symbols comprise uplink data, and the HARQ feedback and the uplink data are sent on an uplink data channel in a time-frequency multiplexing mode.

The uplink control information includes channel state information, the channel state information is transmitted on predetermined c symbols, the c symbols are located before the last b OFDM symbols of the uplink transmission part, where 0< c < n, 0< b < n, c + b < ═ n, c, b are positive integers, 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 length of the n OFDM symbols for the uplink transmission part and the length of the guard interval are configured semi-statically by a base station through system broadcast messages or are configured dynamically through downlink control commands on one or more symbols in the first i OFDM symbols to be notified to the terminal, or are agreed through an agreed rule without notification.

And the values of i in the first i OFDM symbols, the values of j in the continuous j OFDM symbols and the positions of the j OFDM symbols in the downlink sending part are notified to the terminal by the base station through system broadcast message semi-static configuration or dynamically configured through downlink control commands on one or more symbols in the first i OFDM symbols, or are agreed by an agreed rule without notification.

And the values of k in the predetermined k symbols and the positions of the k OFDM symbols in the uplink sending part are notified to the terminal by the base station through system broadcast message semi-static configuration, or notified through a downlink control command on one or more symbols in the first i OFDM symbols or through a downlink control command in the continuous j OFDM symbols, or agreed by an agreed rule without notification.

The method further comprises the following steps:

In order to solve the above technical problem, the present invention provides a signal transmission device, including:

a transmission unit, configured to send a downlink sending part composed of p orthogonal frequency division multiplexing OFDM symbols, where the downlink sending part at least includes downlink control information, downlink data, and uplink grant; the downlink control information is used for indicating downlink data allocation, and the uplink grant is used for indicating uplink data allocation;

The transmission unit is used for transmitting a downlink transmission part consisting of p OFDM symbols and an uplink transmission part consisting of n OFDM symbols, wherein the uplink transmission part is separated by a guard interval and transmitted by a receiving terminal, n is a positive integer greater than 0, and the uplink transmission part at least comprises uplink control information and uplink data;

In order to solve the above technical problem, the present invention further provides a signal transmission device, including:

a transmission unit, configured to receive a downlink transmission part composed of p OFDM symbols and sent by a base station, where the downlink transmission part at least includes downlink control information, downlink data, and uplink grant; the downlink control information is used for indicating downlink data allocation, and the uplink grant is used for indicating uplink data allocation;

receiving the uplink grant on consecutive j symbols after the first i symbols;

The transmission unit is used for receiving a downlink transmission part which is sent by a base station and consists of p OFDM symbols, and sending an uplink transmission part which consists of n OFDM symbols at an interval of a guard interval, wherein n is a positive integer greater than 0, and the uplink transmission part at least comprises uplink control information and uplink data;

Compared with the prior art, in the technical scheme provided by the invention, the base station sends a downlink sending part consisting of p Orthogonal Frequency Division Multiplexing (OFDM) symbols, wherein the downlink sending part at least comprises downlink control information, downlink data and uplink authorization; the downlink control information is used for indicating downlink data allocation, and the uplink grant is used for indicating uplink data allocation; the downlink control information is sent on one or more symbols in the first i OFDM symbols; the uplink grant is sent on j continuous OFDM symbols after the first i OFDM symbols; and the downlink data is at least sent on one or more symbols in the first i OFDM symbols and the p-i-j OFDM symbols except the continuous j OFDM symbols, wherein 00, i, j, p is a positive integer. Thus, the new TDD transmission structure provided by the present invention will bring fixed HARQ RTT (round trip time) and improve transmission efficiency within time interval X.

Drawings

In the drawings (which are not necessarily drawn to scale), the drawings generally illustrate, by way of example, and not by way of limitation, various embodiments discussed herein.

FIG. 1 is a schematic diagram of a downlink transmission-centric structure within a time interval X;

FIG. 2 is a schematic diagram of an upstream transmission-centric structure during a time interval X;

fig. 3 is a schematic diagram of adding GP for downlink fast retransmission after uplink transmission;

fig. 4 is a schematic diagram of performing uplink fast retransmission by adding GP after uplink transmission;

FIG. 5 is a first diagram illustrating a method for transmitting signals within time interval X according to an embodiment of the present invention;

FIG. 6 is a second exemplary diagram illustrating a signal transmission method within the time interval X according to the present invention;

FIG. 7 is a third exemplary diagram illustrating a signal transmission method within time interval X according to an embodiment of the present invention;

FIG. 8 is a fourth exemplary method for transmitting signals within time interval X according to the present invention;

fig. 9 is a first schematic diagram of signal transmission of the bit uplink transmission part;

fig. 10 is a second schematic diagram of signal transmission of an uplink transmission part;

fig. 11 is a third schematic diagram of signal transmission of an uplink transmission part;

fig. 12 is a fourth schematic diagram of signal transmission of an uplink transmission part;

fig. 13 is a first schematic diagram of signal transmission of a downlink transmission part;

fig. 14 is a second schematic diagram of signal transmission of a downlink transmission part;

fig. 15 is a third schematic diagram of signal transmission of a downlink transmission part;

fig. 16 is a fourth schematic diagram of signal transmission of a downlink transmission part;

FIG. 17 is a diagram illustrating fast retransmission under the method of the present invention;

FIG. 18 is a schematic diagram of signal transmission in an FDD system using the method of the present invention;

FIG. 19 is a diagram illustrating GP overhead comparison for the same data transmission resources;

fig. 20 is a first flowchart illustrating a signal transmission method according to an embodiment of the invention;

fig. 21 is a second flowchart illustrating a signal transmission method according to an embodiment of the invention;

fig. 22 is a first schematic structural diagram of a signal transmission device according to an embodiment of the present invention;

fig. 23 is a schematic structural diagram of a signal transmission device according to an embodiment of the present invention.

Detailed Description

So that the manner in which the features and aspects of the embodiments of the present invention can be understood in detail, a more particular description of the embodiments of the invention, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings.

In order to solve the problem that the time delay obviously changes along with the proportion of the uplink and downlink traffic and the overhead problem caused by introducing one GP for quick retransmission, the embodiment of the invention provides a new signal transmission. In the current 3GPP conference it is also pointed out that the introduction of new TDD signaling structures different from the two time domain structures described above is not excluded.

The embodiment of the invention provides a signal transmission method, wherein a base station sends a downlink sending part consisting of p Orthogonal Frequency Division Multiplexing (OFDM) symbols, and the downlink sending part at least comprises downlink control information, downlink data and uplink authorization; the downlink control information is used for indicating downlink data allocation, and the uplink grant is used for indicating uplink data allocation; the downlink control information is sent on one or more symbols in the first i OFDM symbols; the uplink grant is sent on j continuous OFDM symbols after the first i OFDM symbols; and the downlink data is at least sent on one or more symbols in the first i OFDM symbols and the p-i-j OFDM symbols except the continuous j OFDM symbols, wherein 00, i, j, p is a positive integer.

The signal transmission method of the embodiment of the invention not only comprises a TDD duplex mode, but also comprises an FDD duplex mode, and the signal transmission mode of FDD and TDD is kept similar, and the design of a new radio access technology NR can be simplified.

Example one

Fig. 5 is a schematic diagram of signal transmission in TDD mode by using the method of the present invention. The base station firstly sends downlink control information on the first 2 symbols, then sends downlink data, before sending the downlink data, needs to send downlink reference signals for downlink data demodulation, the downlink reference signal for demodulation is transmitted on 1 symbol, the downlink data is transmitted on 5 symbols, the uplink grant is inserted in the middle of the downlink data, the base station sends downlink control information, downlink reference signals, downlink data and uplink authorization on 2 symbols, and after sending downlink control information, downlink reference signals, downlink data and uplink authorization, a guard interval GP is 2 symbols, within the 2 symbols, the base station neither transmits nor receives data, and then the base station receives an uplink reference signal, uplink control information and uplink data, the uplink reference signal is received first for uplink data demodulation, and the uplink control information is inserted into the middle of the uplink data for reception.

In this embodiment, the downlink data portion 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 2 symbols indicates the allocation of the downlink data sent on the next 5 symbols. The downlink data part and the uplink control information for performing HARQ feedback on the downlink data are positioned in the same time interval, namely the uplink control information including the HARQ feedback, which is sent on 2 symbols by the uplink sending part, performs HARQ feedback on the downlink data in the time interval. In addition, in the present 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 transmitted on 2 symbols by the downlink transmission section indicates the allocation of the uplink data transmitted on 5 symbols by the uplink transmission section. In order to utilize the latest channel state information in the next time interval, the CQI and/or RI and/or PMI will also be sent in the uplink control information of 2 symbols, so that the base station receives and processes the information in advance, thereby utilizing the channel state information for downlink data transmission in the next time interval.

Fig. 17 is a schematic diagram of fast retransmission based on the method of the present invention. For downlink retransmission transmission, after the terminal finishes transmitting the uplink control information including the HARQ feedback information, the terminal continues to transmit uplink data, the base station performs HARQ feedback processing and downlink scheduling preparation by using the part of time for uplink data transmission, and when the uplink data is finished, the base station may perform retransmission on the downlink data that has 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 the base station receives the uplink data, the base station uses a part of time of downlink data transmission to process uplink data processing and prepare uplink scheduling, and after the uplink data processing and the uplink scheduling are finished, the base station can retransmit the uplink data which fails to be transmitted in the last time interval through uplink authorization.

In the present embodiment, a time interval of 0.5ms is assumed, including 20 OFDM symbols. The lengths of the downlink sending part, the GP part and the uplink sending part in the time interval of 0.5ms are respectively 10 symbols, 2 symbols and 8 symbols, the length of each part can be configured to the terminal in a semi-static manner through system broadcast messages or does not need to be notified through protocol convention, and the change of the length proportion of each part of the terminal can be notified through dynamically sending downlink control commands in each time interval or in each plurality of time intervals in 2 symbols for sending downlink control information.

In this embodiment, the downlink control information is sent on 2 symbols, the uplink grant is inserted into the downlink data of 3 symbols and sent on 2 symbols, the number of symbols used for sending the downlink control information, the number of symbols used for sending the uplink grant, and the position of the uplink grant in the downlink sending part may be configured to the terminal in a semi-static manner through a system broadcast message or may be informed by a protocol agreement, or the terminal may be informed by dynamically sending the downlink control command at each time interval or at each plurality of time intervals in 2 symbols for sending the downlink control information. In this embodiment, the uplink control information is inserted into the uplink data of 1 symbol and transmitted on 2 symbols, the number of symbols used for transmitting the uplink control information and the position in the uplink transmission part may be configured to the terminal in a semi-static manner through system broadcast messages or may be informed by protocol convention, or the terminal may be informed by dynamically transmitting the downlink control command at each time interval or at each several time intervals in 2 symbols for transmitting the downlink control information or 2 symbols for transmitting the uplink grant.

In this embodiment, the uplink grant sent on 2 symbols is mapped to the downlink control channel and sent, and no downlink data is sent in the 2 symbols. Fig. 13 is a diagram illustrating that an uplink grant is mapped to a downlink data channel for transmission, but there is no downlink data transmission in the 2 symbols of the downlink data channel for uplink grant transmission. Fig. 14, 15, and 16 show the case where data is transmitted in 2 symbols in which an uplink grant is transmitted. In fig. 14, the uplink grant is sent in the downlink control channel, the downlink data is sent in the downlink data channel, and the downlink control channel and the downlink data channel are frequency division multiplexed within 2 symbols. In fig. 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 when some terminals do not have the downlink data, the uplink grant is sent alone in the downlink control channel, and the downlink control channel and the downlink data channel are sent in a frequency division multiplexing manner. In fig. 16, the uplink grant and the downlink data are sent in the downlink data channel in a time-frequency multiplexing manner, including that when some terminals do not send downlink data, the uplink grant is sent alone on the data channel. The 2-symbol uplink grant portion shown in fig. 5 related to this embodiment may also be sent in any one of the manners shown in fig. 13, fig. 14, fig. 15, and fig. 16.

In this embodiment, the uplink control information including HARQ feedback sent on 2 symbols is mapped to an uplink control channel and sent, and no uplink data is sent in the 2 symbols. Fig. 9 is a diagram illustrating that the uplink control information including the HARQ feedback is mapped to the uplink data channel and transmitted, but there is no uplink data transmission in the uplink data channel for uplink control information transmission of these 2 symbols. Fig. 10, 11, and 12 show the case where data is transmitted in a symbol for transmitting 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 within the 2 symbols by using the frequency division multiplexing method. In fig. 11, the uplink control information is sent in an uplink control channel or an uplink data channel, and when the uplink control information is sent in the uplink data channel, the uplink control information is time-frequency multiplexed with uplink data, or when some terminals do not have uplink data, the uplink control information is sent separately in the uplink control channel, and the uplink control channel and the uplink data channel are sent in a frequency division multiplexing manner. In fig. 12, the uplink control information and the uplink data are sent in the uplink data channel in a time-frequency multiplexing manner, including that when some terminals do not send uplink data, the uplink control information is sent on the data channel alone. The 2-symbol uplink control information portion shown in fig. 5 related to the present embodiment may also be transmitted in any one of the manners shown in fig. 9, fig. 10, fig. 11, and fig. 12. In addition, the uplink control information transmitted over 2 symbols may include an uplink scheduling request for the terminal to request uplink resource allocation to the base station, and the uplink control information including the scheduling request is transmitted in an uplink control channel or in an uplink data channel.

Example two

Fig. 6 is another schematic diagram of signal transmission in TDD mode by using the method of the present invention. The base station firstly sends downlink control information on the first 2 symbols, then sends downlink data, before sending the downlink data, needs to send downlink reference signals for downlink data demodulation, the downlink reference signals for demodulation are sent on 1 symbol, the downlink data are sent on 5 symbols, the uplink authorization is sent on 2 symbols after the downlink data are sent, the base station sends the downlink control information on the downlink sending part, the downlink reference signals, the downlink data and the uplink authorization have a guard interval GP of 2 symbols, within the 2 symbols, the base station does not send data nor receive data, then the base station receives the uplink reference signals, the uplink control information and the uplink data, the uplink control information sent on the 2 symbols is firstly received, and then receives the uplink reference signals for uplink data demodulation, and finally, receiving uplink data.

In the present embodiment, a time interval of 0.5ms is assumed, including 20 OFDM symbols. The lengths of the downlink sending part, the GP part and the uplink sending part in the time interval of 0.25ms are respectively 10 symbols, 2 symbols and 8 symbols, the length of each part can be configured to the terminal in a semi-static manner through system broadcast messages or does not need to be notified through protocol convention, and the change of the length proportion of each part of the terminal can be notified through dynamically sending downlink control commands in each time interval or in each plurality of time intervals in 2 symbols for sending downlink control information.

In this embodiment, the downlink control information is sent on 2 symbols, the uplink grant is sent on 2 symbols after the downlink data is sent, the number of symbols used for sending the downlink control information, the number of symbols used for sending the uplink grant and the position of the uplink grant in the downlink sending part may be configured to the terminal in a semi-static manner through a system broadcast message or may be informed through protocol agreement, or the terminal may be informed through dynamically sending the downlink control command at each time interval or at each plurality of time intervals in 2 symbols for sending the downlink control information. In this embodiment, the uplink control information is sent on 2 symbols, and is sent first in the uplink sending part, the number of symbols used for sending the uplink control information and the position in the uplink sending part may be configured to the terminal in a semi-static manner through system broadcast messages or may be agreed by a protocol without notification, or the terminal may be notified by dynamically sending a downlink control command at each time interval or at each several time intervals in 2 symbols sending the downlink control information or 2 symbols sending the uplink grant.

Similar to the embodiment, in the embodiment, the uplink grant sent on 2 symbols is mapped to the downlink control channel for sending, and no downlink data is sent in the 2 symbols. Fig. 13 is a diagram illustrating that an uplink grant is mapped to a downlink data channel for transmission, but there is no downlink data transmission in the 2 symbols of the downlink data channel for uplink grant transmission. . Fig. 14, 15, and 16 show the case where data is transmitted in 2 symbols in which an uplink grant is transmitted. The uplink grant portion sent on 2 symbols as given in fig. 6 related to this embodiment may also be sent in any one of the manners of fig. 13, fig. 14, fig. 15, or fig. 16.

Similar to the embodiment, in the embodiment, the uplink control information including HARQ feedback sent on 2 symbols is mapped to the uplink control channel and sent, and no uplink data is sent in the 2 symbols. Fig. 9 is a diagram illustrating that the uplink control information including the HARQ feedback is mapped to the uplink data channel and transmitted, but there is no uplink data transmission in the uplink data channel for uplink control information transmission of these 2 symbols. Fig. 10, 11, and 12 show the case where data is transmitted in 2 symbols in which uplink control information is transmitted. The uplink control information portion sent over 2 symbols as given in fig. 6 in connection with this embodiment may also be sent in any of the manners of fig. 9, fig. 10, fig. 11, or fig. 12. In addition, the uplink control information transmitted over 2 symbols may include an uplink scheduling request for the terminal to request uplink resource allocation to the base station, and the uplink control information including the scheduling request is transmitted in an uplink control channel or in an uplink data channel.

EXAMPLE III

Fig. 7 is another schematic diagram of signal transmission in TDD mode by using the method of the present invention. The base station firstly sends downlink control information on the first 2 symbols and then sends downlink data, before sending the downlink data, a downlink reference signal for downlink data demodulation needs to be sent, the downlink reference signal for demodulation is sent on 1 symbol, the downlink data is sent on 5 symbols, an uplink authorization is inserted into the middle of the downlink data and sent on 2 symbols, the base station sends the downlink control information, the downlink reference signal, the downlink data and the uplink authorization in a downlink sending part, a guard interval GP is 2 symbols, within the 2 symbols, the base station does not send data or receive data, then the base station receives the uplink reference signal, the uplink control information and the uplink data, the uplink control information sent on the 2 symbols is firstly received and then receives the uplink reference signal for uplink data demodulation, and finally, receiving uplink data.

In the present embodiment, a time interval of 0.25ms is assumed, including 20 OFDM symbols. The lengths of the downlink sending part, the GP part and the uplink sending part in the time interval of 0.25ms are respectively 10 symbols, 2 symbols and 8 symbols, the length of each part can be configured to the terminal in a semi-static manner through system broadcast messages or does not need to be notified through protocol convention, and the change of the length proportion of each part of the terminal can be notified through dynamically sending downlink control commands in each time interval or in each plurality of time intervals in 2 symbols for sending downlink control information.

In this embodiment, the downlink control information is sent on 2 symbols, the uplink grant is inserted into the downlink data of 3 symbols and sent on 2 symbols, the number of symbols used for sending the downlink control information, the number of symbols used for sending the uplink grant, and the position of the uplink grant in the downlink sending part may be configured to the terminal in a semi-static manner through a system broadcast message or may be informed by a protocol agreement, or the terminal may be informed by dynamically sending the downlink control command at each time interval or at each plurality of time intervals in 2 symbols for sending the downlink control information. In this embodiment, the uplink control information is sent on 2 symbols, and is sent first in the uplink sending part, the number of symbols used for sending the uplink control information and the position in the uplink sending part may be configured to the terminal in a semi-static manner through system broadcast messages or may be agreed by a protocol without notification, or the terminal may be notified by dynamically sending a downlink control command at each time interval or at each several time intervals in 2 symbols sending the downlink control information or 2 symbols sending the uplink grant.

Similar to the first and second embodiments, the uplink grant sent on 2 symbols in this embodiment is mapped to the downlink control channel for sending, and no downlink data is sent in the 2 symbols. Fig. 13 is a diagram illustrating that an uplink grant is mapped to a downlink data channel for transmission, but there is no downlink data transmission in the 2 symbols of the downlink data channel for uplink grant transmission. Fig. 14, 15, and 16 show the case where data is transmitted in 2 symbols in which an uplink grant is transmitted. The uplink grant portion sent on 2 symbols shown in fig. 7 related to this embodiment may also be sent in any one of the manners shown in fig. 13, fig. 14, fig. 15, and fig. 16.

Similar to the first and second embodiments, the uplink control information including HARQ feedback sent on 2 symbols in the present embodiment is mapped to the uplink control channel and sent, and no uplink data is sent in the 2 symbols. Fig. 9 is a diagram illustrating that the uplink control information including the HARQ feedback is mapped to the uplink data channel and transmitted, but there is no uplink data transmission in the uplink data channel for uplink control information transmission of these 2 symbols. Fig. 10, 11, and 12 show the case where data is transmitted in 2 symbols in which uplink control information is transmitted. The uplink control information portion sent over 2 symbols as given in fig. 7 in connection with this embodiment may also be sent in any of the manners of fig. 9, fig. 10, fig. 11, or fig. 12. In addition, the uplink control information transmitted over 2 symbols may include an uplink scheduling request for the terminal to request uplink resource allocation to the base station, and the uplink control information including the scheduling request is transmitted in an uplink control channel or in an uplink data channel.

Example four

Fig. 8 is another schematic diagram of signal transmission in TDD mode by using the method of the present invention. The base station firstly sends downlink control information on the first 2 symbols, then sends downlink data, before sending the downlink data, needs to send downlink reference signals for downlink data demodulation, the downlink reference signal used for demodulation is sent on 1 symbol, the downlink data is sent on 5 symbols, the uplink authorization is sent on 2 symbols after the downlink data is sent, the base station sends the downlink control information on the downlink sending part, a guard interval GP is 2 symbols after the downlink reference signal, the downlink data and the uplink authorization, within these 2 symbols, the base station neither transmits 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 being received first, for uplink data demodulation, uplink control information transmitted over 2 symbols is inserted into the uplink data for intermediate reception.

In this embodiment, the downlink control information is sent on 2 symbols, the uplink grant is sent on 2 symbols after the downlink data is sent, the number of symbols used for sending the downlink control information, the number of symbols used for sending the uplink grant, and the position of the uplink grant in the downlink sending part may be configured to the terminal in a semi-static manner through a system broadcast message or may be informed through protocol agreement, or the terminal may be informed through dynamically sending the downlink control command at each time interval or at each plurality of time intervals in 2 symbols for sending the downlink control information. In this embodiment, the uplink control information is inserted into the uplink data of 1 symbol and transmitted on 2 symbols, the number of symbols used for transmitting the uplink control information and the position in the uplink transmission part may be configured to the terminal in a semi-static manner through system broadcast messages or may be informed by protocol convention, or the terminal may be informed by dynamically transmitting the downlink control command at each time interval or at each several time intervals in 2 symbols for transmitting the downlink control information or 2 symbols for transmitting the uplink grant.

Similar to the first, second, and third embodiments, the uplink grant sent on 2 symbols in this embodiment is mapped to the downlink control channel to be sent, and no downlink data is sent in the 2 symbols. Fig. 13 is a diagram illustrating that an uplink grant is mapped to a downlink data channel for transmission, but there is no downlink data transmission in the 2 symbols of the downlink data channel for uplink grant transmission. Fig. 14, 15, and 16 show the case where data is transmitted in 2 symbols in which an uplink grant is transmitted. The uplink grant portion sent on 2 symbols shown in fig. 8 related to this embodiment may also be sent in any one of the manners shown in fig. 13, fig. 14, fig. 15, and fig. 16.

Similar to the first, second, and third embodiments, the uplink control information including HARQ feedback sent on 2 symbols in this embodiment is mapped to the uplink control channel and sent, and no uplink data is sent in the 2 symbols. Fig. 9 is a diagram illustrating that the uplink control information including the HARQ feedback is mapped to the uplink data channel and transmitted, but there is no uplink data transmission in the uplink data channel for uplink control information transmission of these 2 symbols. Fig. 10, 11, and 12 show the case where data is transmitted in 2 symbols in which uplink control information is transmitted. The uplink control information portion sent over 2 symbols as given in fig. 8 in connection with this embodiment may also be sent in any of the manners of fig. 9, fig. 10, fig. 11, or fig. 12. In addition, the uplink control information transmitted over 2 symbols may include an uplink scheduling request for the terminal to request uplink resource allocation to the base station, and the uplink control information including the scheduling request is transmitted in an uplink control channel or in an uplink data channel.

EXAMPLE five

Fig. 18 is another schematic diagram of FDD signaling using the method of the present invention. The base station firstly sends downlink control information on the first 2 symbols at the nth downlink sending part at a downlink frequency point, then sends downlink data, before sending the downlink data, needs to send a downlink reference signal for downlink data demodulation, the downlink reference signal for demodulation is sent on 1 symbol, the downlink data is sent on 7 symbols, an uplink authorization is inserted into the middle of the downlink data, and the downlink data is sent on 2 symbols. After a period of time, the base station starts to receive the (n + 1) th uplink transmission part at the uplink frequency point, the uplink reference signal is received first and used for uplink data demodulation, and the uplink control information transmitted on 2 symbols is inserted into the middle of 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 nth downlink transmission part, i.e. the downlink control information transmitted on the first 2 symbols indicates the allocation of downlink data transmitted on the next 7 symbols. The downlink data part and the uplink control information for performing HARQ feedback on the downlink data are respectively located in the nth downlink transmission part and the (n + 1) th uplink transmission part, that is, the uplink control information including HARQ feedback, which is transmitted on 2 symbols in the (n + 1) th uplink transmission part, performs fast HARQ feedback on the downlink data in the nth downlink transmission part. In addition, in the present embodiment, the uplink data and the uplink grant indicating the uplink data allocation are respectively located in the n +1 th uplink transmission part and the nth downlink transmission part, that is, the uplink grant transmitted on 2 symbols in the nth downlink transmission part indicates the allocation of the uplink data transmitted on 8 symbols in the n +1 th uplink transmission part. In this embodiment, the base station needs to start receiving the uplink control information at offset after the end of the nth downlink transmission part in order to be able to process the uplink control information and prepare downlink scheduling in the time of the n +1 th downlink transmission part so as to be able to perform retransmission in the n +2 th downlink transmission part.

In order to utilize the latest channel state information when the (n + 2) th downlink transmission part transmits, the CQI and/or RI and/or PMI will also be transmitted in the uplink control information of 2 symbols of the (n + 1) th uplink transmission part, so that the base station receives and processes these information in advance, thereby enabling downlink data transmission based on these channel state information in the (n + 2) th downlink transmission part.

In the present embodiment, it is assumed that the downlink transmission part is 0.25ms and includes 12 OFDM symbols. The downlink control information is sent on 2 symbols, the uplink authorization is inserted into the downlink data of 5 symbols and sent on 2 symbols, the number of symbols used for sending the downlink control information, the number of symbols used for sending the uplink authorization and the position of the uplink authorization in the downlink sending part can be configured to the terminal in a semi-static mode through system broadcast messages or need not be notified through protocol convention, and the terminal can also be notified through dynamically sending downlink control commands in each time interval or each plurality of time intervals in the 2 symbols for sending the downlink control information. In this embodiment, the uplink control information is inserted into the uplink data of 1 symbol and transmitted on 2 symbols, the number of symbols used for transmitting the uplink control information and the position in the uplink transmission part may be configured to the terminal in a semi-static manner through system broadcast messages or may be informed by protocol convention, or the terminal may be informed by dynamically transmitting the downlink control command at each time interval or at each several time intervals in 2 symbols for transmitting the downlink control information or 2 symbols for transmitting the uplink grant.

Similar to the first, second, third, and fourth embodiments, the uplink grant sent on 2 symbols in this embodiment is mapped to the downlink control channel to be sent, and no downlink data is sent in the 2 symbols. Fig. 13 is a diagram illustrating that an uplink grant is mapped to a downlink data channel for transmission, but there is no downlink data transmission in the 2 symbols of the downlink data channel for uplink grant transmission. Fig. 14, 15, and 16 show the case where data is transmitted in 2 symbols in which an uplink grant is transmitted. The uplink grant portion sent over 2 symbols shown in fig. 18 related to this embodiment may also be sent in any one of the manners shown in fig. 13, fig. 14, fig. 15, and fig. 16.

Similar to the first, second, third, and fourth embodiments, the uplink control information including HARQ feedback sent on 2 symbols in this embodiment is mapped to the uplink control channel and sent, and there is no uplink data sent in the 2 symbols. Fig. 9 is a diagram illustrating that the uplink control information including the HARQ feedback is mapped to the uplink data channel and transmitted, but there is no uplink data transmission in the uplink data channel for uplink control information transmission of these 2 symbols. Fig. 10, 11, and 12 show the case where data is transmitted in 2 symbols in which uplink control information is transmitted. The uplink control information portion sent over 2 symbols as given in fig. 18 in connection with this embodiment may also be sent in any of the manners of fig. 9, 10, 11 or 12. In addition, the uplink control information transmitted over 2 symbols may include an uplink scheduling request for the terminal to request uplink resource allocation to the base station, and the uplink control information including the scheduling request is transmitted in an uplink control channel or in an uplink data channel.

In addition, in fig. 18, by reasonably setting the position of the uplink grant inserted into the downlink data of the nth downlink transmission part and the position of the uplink control information including HARQ feedback inserted into the uplink data of the (n + 1) th uplink transmission part, the start time of the (n + 1) th uplink transmission part can be aligned with the start time of the (n + 1) th downlink transmission part, and for both uplink and downlink, new transmission can be performed in the nth uplink or downlink transmission part, and retransmission can be performed in the (n + 2) th uplink or downlink transmission part.

When the FDD system employs the method of the present invention to perform signal transmission, the downlink transmitting part and the uplink transmitting part may also employ transmitting methods similar to those of the downlink transmitting part and the uplink transmitting part shown in the schematic diagrams of fig. 6, fig. 7 and fig. 8.

In the above first to fifth embodiments, the downlink reference signal for downlink control information or downlink data demodulation is transmitted on 0, 1 or 2 symbols of the 2 symbols for downlink control information transmission, the downlink reference signal for uplink grant or downlink data demodulation 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 transmitted on 0, 1 or more symbols of the 2 symbols for uplink control information transmission. In addition to the reference signal design for demodulation described in the above embodiments, other ways of reference signal design for downlink control information, uplink grant, and uplink control information demodulation are not excluded, such as sending the reference signal before the relevant control information.

Fig. 20 is a first flowchart of a signal transmission method according to an embodiment of the present invention, where the method includes:

step 201: a base station sends a downlink sending part consisting of p Orthogonal Frequency Division Multiplexing (OFDM) symbols, wherein the downlink sending part at least comprises downlink control information, downlink data and uplink authorization; the downlink control information is used for indicating downlink data allocation, and the uplink grant is used for indicating uplink data allocation;

The method further comprises the following steps:

In the above scheme, the receiving, by the base station, the uplink transmission part consisting of n OFDM symbols sent by the terminal includes:

In the foregoing scheme, the uplink grant is sent on consecutive j OFDM symbols after the first i symbols, and includes at least one of the following five cases:

In the above scheme, the receiving the HARQ feedback on predetermined k symbols includes at least one of the following five cases:

In the above scheme, the downlink data and the downlink control information indicating the downlink data allocation are located in the same downlink transmission part.

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

In the above scheme, the uplink data and the uplink grant indicating the uplink data allocation are located in the same time interval.

In the above scheme, the uplink control information includes channel state information, and the channel state information is received on predetermined c symbols, where the c symbols are located before the last b OFDM symbols of the uplink transmission part, where 0< c < n, 0< b < n, c + b < ═ n, and c, b are positive integers, and the channel state information includes one or more of a channel quality indicator CQI, a precoding matrix indicator PMI, and a rank indicator RI.

In the above scheme, the p OFDM symbols for the downlink transmission part, the n OFDM symbols for the uplink transmission part, and the length of the guard interval are configured semi-statically by the base station through system broadcast messages or dynamically configured by downlink control commands located on one or more symbols of the first i OFDM symbols and notified to the terminal, or are agreed by an agreed rule without notification.

In the above scheme, the value of i in the first i OFDM symbols, the value of j in the j consecutive OFDM symbols, and the position of the j OFDM symbols in the downlink transmission part are notified to the terminal by the base station through system broadcast message semi-static configuration or dynamically configured through a downlink control command on one or more symbols in the first i OFDM symbols, or are agreed by an agreed rule without notification.

In the above scheme, the values of k in the predetermined k OFDM symbols and the positions of the k OFDM symbols in the uplink transmission part are notified to the terminal by the base station through system broadcast message semi-static configuration, or notified through a downlink control command located on one or more symbols in the first i OFDM symbols or through a downlink control command located in the consecutive j OFDM symbols, or agreed by an agreed rule without notification.

In the above scheme, the value of c in the c OFDM symbols and the position of the c OFDM symbols in the uplink transmission part are notified to the terminal by the base station through system broadcast message semi-static configuration, or notified through a downlink control command located on one or more symbols in the first i OFDM symbols or through a downlink control command located in the consecutive j OFDM symbols, or agreed by an agreed rule without notification.

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

In the above scheme, the minimum value is determined according to the processing time of the uplink data, the preparation time of the uplink grant, and the length of each OFDM symbol in the time interval.

In the above scheme, the number of symbols h after the configured or agreed k OFDM symbols has a minimum value.

In the above scheme, the minimum value is determined according to the processing time of the uplink control information, the preparation time of the downlink scheduling, and the length of each OFDM symbol in the time interval.

Fig. 21 is a second flowchart illustrating a signal transmission method according to an embodiment of the present invention, where the method includes:

step 211: a terminal receives a downlink sending part which is sent by a base station and consists of p OFDM symbols, wherein the downlink sending part at least comprises downlink control information, downlink data and uplink authorization; the downlink control information is used for indicating downlink data allocation, and the uplink grant is used for indicating uplink data allocation;

In the above scheme, the method further comprises:

In the above scheme, the transmitting, by the terminal, an uplink transmission part composed of n OFDM symbols includes:

In the above scheme, the receiving the uplink grant on j consecutive OFDM symbols after the first i symbols includes at least one of the following four cases:

In the above scheme, the HARQ feedback is sent on predetermined k symbols, and includes at least one of the following four cases:

In the foregoing solution, the uplink control information includes channel state information, where the channel state information is sent on predetermined c symbols, and 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 and b are positive integers, and the channel state information includes one or more of CQI, PMI, and RI.

In the above scheme, the p OFDM symbols for the downlink transmission part, the n OFDM symbols for the uplink transmission part, and the length of the guard interval are configured semi-statically by the base station through system broadcast messages or dynamically configured and notified to the terminal through downlink control commands located on one or more symbols of the first i OFDM symbols, or are agreed by an agreed rule without notification.

In the above scheme, 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 transmission part are notified to the terminal by the base station through system broadcast message semi-static configuration or dynamically configured through a downlink control command on one or more symbols in the first i OFDM symbols, or are agreed by an agreed rule without notification.

In the above scheme, the values of k in the predetermined k symbols and the positions of the k OFDM symbols in the uplink transmission part are notified to the terminal by the base station through system broadcast message semi-static configuration, or notified through a downlink control command located on one or more symbols in the first i OFDM symbols or through a downlink control command located in the consecutive j OFDM symbols, or agreed by an agreed rule without notification.

In the above scheme, the method further comprises:

Fig. 22 is a schematic structural diagram of a signal transmission apparatus according to an embodiment of the present invention, which is applied to a base station, and the signal transmission apparatus includes:

a transmission unit 221, configured to send a downlink sending part composed of p orthogonal frequency division multiplexing OFDM symbols, where the downlink sending part at least includes downlink control information, downlink data, and uplink grant; the downlink control information is used for indicating downlink data allocation, and the uplink grant is used for indicating uplink data allocation;

In the above scheme, the transmission unit 221 receives an uplink transmission part, which is sent by a terminal and is composed of n OFDM symbols, at an interval of a guard interval after sending a downlink transmission part composed of p OFDM symbols, where n is a positive integer greater than 0, and the uplink transmission part at least includes uplink control information and uplink data;

It will be understood by those skilled in the art that the functions implemented by the elements in the signal transmission device shown in fig. 22 can be understood by referring to the related description of the signal transmission method described above.

Fig. 23 is a schematic structural diagram of a signal transmission device according to an embodiment of the present invention, which is applied to a terminal, and the signal transmission device includes:

a transmission unit 231, configured to receive a downlink transmission part composed of p OFDM symbols and sent by a base station, where the downlink transmission part at least includes downlink control information, downlink data, and uplink grant; the downlink control information is used for indicating downlink data allocation, and the uplink grant is used for indicating uplink data allocation;

receiving the uplink grant on consecutive j symbols after the first i symbols;

In the above scheme, the transmission unit 231 receives an uplink transmission part composed of n OFDM symbols, where n is a positive integer greater than 0, and the uplink transmission part includes at least uplink control information and uplink data, and is separated by a guard interval from a downlink transmission part composed of p OFDM symbols sent by the base station;

In the above scheme, 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 transmission part are notified to the terminal by the base station through system broadcast message semi-static configuration or dynamically configured through a downlink control command on one or more symbols in the first i OFDM symbols, or are agreed by an agreed rule without notification. It will be understood by those skilled in the art that the implementation functions of the units in the signal transmission device shown in fig. 23 can be understood by referring to the related description of the signal transmission method described above.

The signal transmission method provided by the embodiment of the invention can meet the requirements of different uplink and downlink flows by dynamically adjusting the proportion of the DL data and the UL data in the time interval X. Because the downlink data and the uplink data are simultaneously supported in the time interval X, even if the ratio of the uplink flow to the downlink flow is changed, the retransmission can be immediately carried out in the next time interval X, the retransmission timing relationship is simple, and the characteristic of low time delay of the uplink flow and the downlink flow is ensured.

The selection of the length of the time interval X needs to balance the overhead occupied by the control channel and the GP in X and the requirement of the uplink and downlink services on the time delay. If the delay requirement is high, i.e. a lower delay is to be ensured, the number of symbols of the time interval X can be reduced appropriately, and the overhead of the control channel and the GP is increased. For the case of relaxed delay requirement, the length of time interval X can be increased, i.e. the ratio 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 invention inserts downlink data transmission between the uplink grant and the uplink data and inserts uplink data between the downlink data and the uplink feedback, so as to reduce the overhead of GP, that is, during the part of time for transmitting the uplink data, the terminal may process the downlink data and prepare HARQ information, perform HARQ information feedback after the processing is completed, during the part of time for transmitting the downlink data, the terminal may detect and process the uplink grant and prepare the uplink data, and perform uplink data transmission after GP. By appropriately inserting data transmission, self-contained feedback in time interval X can be more effectively realized.

As can be seen from fig. 19, compared with the method of sending downlink data and uplink data by combining the structure of the time interval X centered on downlink sending and the structure of the time interval X centered on uplink sending, the method provided by the present invention reduces the GP overhead by more than half and obviously improves the transmission efficiency while ensuring the same effective data transmission.

The signal transmission method of the downlink sending part and the uplink sending part can be used not only in the authorized frequency band, but also in the unauthorized frequency band for signal transmission by adopting the principle of the method.

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

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

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

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

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.

Claims

1. A method of signal transmission, the method comprising:

the downlink data is at least sent on one or more symbols in the first i OFDM symbols and the p-i-j OFDM symbols except the continuous j OFDM symbols, wherein 00, i, j, p is a positive integer;

and the values of i in the first i OFDM symbols, the values of j in the continuous j OFDM symbols and the positions of the j OFDM symbols in the downlink sending part are notified to a terminal by a base station through system broadcast message semi-static configuration or dynamically configured through downlink control commands on one or more symbols in the first i OFDM symbols, or agreed by a preset rule without notification.

2. The signal transmission method of claim 1, further comprising:

3. The signal transmission method according to claim 2, wherein the base station receives an uplink transmission portion composed of n OFDM symbols transmitted by the terminal, and includes:

receiving the uplink data on one or more symbols of n-k symbols other than the k symbols.

4. The signal transmission method according to claim 1, wherein the uplink grant is transmitted on j consecutive OFDM symbols after the first i OFDM symbols, and includes at least one of the following five cases:

the j continuous OFDM symbols do not comprise downlink data, and the uplink authorization is sent on a downlink control channel;

the j continuous OFDM symbols do not comprise downlink data, and the uplink authorization is sent on a downlink data channel;

the j continuous OFDM symbols comprise downlink data, the uplink authorization 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 subjected to frequency division multiplexing;

the continuous j OFDM symbols comprise downlink data, and the uplink authorization and the downlink data are sent on a downlink data channel in a time-frequency multiplexing mode;

the j continuous OFDM symbols comprise downlink data, the uplink authorization is sent on a downlink control channel, the uplink authorization and the downlink data are sent on a downlink data channel in a time-frequency multiplexing mode, and the downlink control channel and the downlink data channel are subjected to frequency division multiplexing.

5. The signal transmission method of claim 3, wherein receiving the HARQ feedback over a predetermined number k of symbols comprises at least one of the following five cases:

receiving the HARQ feedback on an uplink control channel without including uplink data in the k OFDM symbols;

receiving the HARQ feedback on an uplink data channel when the k OFDM symbols do not include uplink data;

and the k OFDM symbols comprise uplink data, the HARQ feedback is received on an uplink control channel, the HARQ feedback and the uplink data are received on the uplink data channel, the HARQ feedback and the uplink data are subjected to time-frequency multiplexing, and the uplink control channel and the uplink data channel are subjected to frequency division multiplexing.

6. 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 a same downlink transmission section.

7. The signal transmission method according to claim 2, wherein the downlink data and the uplink control information for performing HARQ feedback on the downlink data are located in a same time interval.

8. The signal transmission method according to claim 2, wherein the uplink data and the uplink grant indicating the uplink data allocation are located in a same time interval.

9. The signal transmission method according to claim 2, wherein the uplink control information comprises channel state information, the channel state information is received on predetermined c symbols, the c symbols are located before the last b OFDM symbols of the uplink transmission part, wherein 0< c < n, 0< b < n, c + b < ═ n, c, b are positive integers, and the channel state information comprises one or more of a channel quality indication CQI, a precoding matrix indication PMI, and a rank indication RI.

10. The signal transmission method according to claim 2, wherein the p OFDM symbols for the downlink transmission part, the n OFDM symbols for the uplink transmission part, and the length of the guard interval are configured semi-statically by a system broadcast message or dynamically by a downlink control command on one or more symbols of the first i OFDM symbols and notified to the terminal by a base station, or agreed by a predetermined rule without notification.

11. The signal transmission method according to claim 3, wherein the values of k in the predetermined k OFDM symbols and the positions of the k OFDM symbols in the uplink transmission part are notified to the terminal by the base station through a system broadcast message semi-static configuration or through downlink control commands located on one or more of the first i OFDM symbols or through downlink control commands located in the consecutive j OFDM symbols, or through a predetermined rule convention without notification.

12. The signal transmission method as claimed in claim 1, wherein at least the number of symbols for the downlink control information transmission before the configured or agreed j consecutive symbols has a minimum value.

13. The signal transmission method according to claim 12, wherein the minimum value is determined according to a processing time for the uplink data and a preparation time for the uplink grant and a length of each OFDM symbol in a time interval.

14. The signal transmission method according to claim 11, wherein the number of symbols h after the k OFDM symbols has a minimum value.

15. The signal transmission method according to claim 14, 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 in a time interval.

16. A method of signal transmission, the method comprising:

wherein the downlink control information is received on one or more symbols of the first i OFDM symbols;

receiving the uplink grant on one or more of j consecutive OFDM symbols after the first i OFDM symbols;

receiving the downlink data at least on one or more symbols of the first i OFDM symbols and p-i-j OFDM symbols except the continuous j OFDM symbols, wherein 00, i, j, p is a positive integer;

and the values of i in the first i OFDM symbols, the values of j in the continuous j OFDM symbols and the positions of the j OFDM symbols in the downlink sending part are notified to the terminal by the base station through system broadcast message semi-static configuration or dynamically configured through downlink control commands on one or more symbols in the first i OFDM symbols, or are agreed by a preset rule without notification.

17. The signal transmission method of claim 16, further comprising:

18. The signal transmission method according to claim 17, wherein the terminal transmits an uplink transmission part consisting of n OFDM symbols, comprising:

19. The signal transmission method according to claim 16, wherein receiving the uplink grant on j consecutive OFDM symbols after the first i OFDM symbols comprises at least one of the following four cases:

the j continuous OFDM symbols do not comprise downlink data, and the uplink authorization is received on a downlink control channel;

the j continuous OFDM symbols do not comprise downlink data, and the uplink authorization is received on a downlink data channel;

the continuous j OFDM symbols comprise downlink data, the uplink authorization is received on a downlink control channel, the downlink data is received on a downlink data channel, and the downlink control channel and the downlink data channel are subjected to frequency division multiplexing;

and the continuous j OFDM symbols comprise downlink data, the uplink authorization and the downlink data are received on a downlink data channel, and the uplink authorization and the downlink data are subjected to time-frequency multiplexing.

20. The signal transmission method of claim 18, wherein the HARQ feedback is sent over a predetermined number k of symbols, and wherein the HARQ feedback is sent over at least one of the following four cases:

21. The signal transmission method according to claim 16, wherein the downlink data and the downlink control information indicating the downlink data allocation are located in a same downlink transmission section.

22. The signal transmission method according to claim 17, wherein the downlink data and the uplink control information for HARQ feedback on the downlink data are located in a same time interval.

23. The signal transmission method of claim 17, wherein the uplink data and the uplink grant indicating the uplink data allocation are located in a same time interval.

24. The signal transmission method of claim 17, wherein the uplink control information comprises channel state information, the channel state information is transmitted on predetermined c symbols, the c symbols are located before the last b OFDM symbols of the uplink transmission part, wherein 0< c < n, 0< b < n, c + b < ═ n, c, b are positive integers, and the channel state information comprises one or more of CQI, PMI and RI.

25. The signal transmission method as claimed in claim 17, wherein the p OFDM symbols for the downlink transmission part, the n OFDM symbols for the uplink transmission part, and the length of the guard interval are configured by the base station semi-statically through a system broadcast message or dynamically through a downlink control command on one or more symbols of the first i OFDM symbols, or are agreed by a predetermined rule without notification.

26. The signal transmission method according to claim 18, wherein the values of k in the predetermined k OFDM symbols and the positions of the k OFDM symbols in the uplink transmission part are notified to the terminal by the base station through a system broadcast message semi-static configuration, or notified through a downlink control command located on one or more symbols in the first i OFDM symbols or through a downlink control command located in the consecutive j OFDM symbols, or agreed by a predetermined rule without notification.

27. The signal transmission method as claimed in claim 16, wherein at least the number of symbols for the downlink control information transmission before the configured or agreed j consecutive symbols has a minimum value.

28. The signal transmission method as claimed in claim 27, wherein the minimum value is determined according to a processing time for uplink data and a preparation time for uplink grant and a length of each OFDM symbol in a time interval.

29. The signal transmission method of claim 26, further comprising:

the number of symbols h after the k OFDM symbols has a minimum value.

30. The signal transmission method according to claim 29, 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 in a time interval.

31. A signal transmission apparatus applied to a base station, the signal transmission apparatus comprising:

32. The signal transmission apparatus according to claim 31, wherein the transmission unit is configured to transmit a downlink transmission part composed of p OFDM symbols followed by a guard interval, receive an uplink transmission part composed of n OFDM symbols transmitted by a terminal, wherein n is a positive integer greater than 0, and the uplink transmission part at least includes uplink control information and uplink data;

33. The signal transmission apparatus of claim 31, wherein the uplink grant is transmitted on j consecutive OFDM symbols after the first i OFDM symbols, and wherein the uplink grant includes at least one of the following five cases:

34. The apparatus for signaling of claim 31, wherein the downlink data and the downlink control information indicating the downlink data allocation are located in a same downlink transmission section.

35. The apparatus for signal transmission according to claim 32, wherein the downlink data and the uplink control information for HARQ feedback for the downlink data are located in a same time interval.

36. The signal transmission apparatus of claim 32, wherein the uplink data and the uplink grant indicating the uplink data allocation are located in a same time interval.

37. A signal transmission apparatus applied to a terminal, the signal transmission apparatus comprising:

receiving the uplink grant on consecutive j OFDM symbols after the first i OFDM symbols;

38. The signal transmission apparatus of claim 37, wherein the transmission unit receives a downlink transmission part composed of p OFDM symbols transmitted by a base station, and transmits an uplink transmission part composed of n OFDM symbols with a guard interval therebetween, n being a positive integer greater than 0, the uplink transmission part at least including uplink control information and uplink data;

39. The signal transmission apparatus of claim 37, wherein receiving the uplink grant on j consecutive OFDM symbols after the first i OFDM symbols comprises at least one of the following four cases:

40. The apparatus for signaling of claim 37, wherein the downlink data and the downlink control information indicating the downlink data allocation are located in a same downlink transmission section.

41. The apparatus for signal transmission according to claim 38, wherein the downlink data and the uplink control information for HARQ feedback for the downlink data are located in a same time interval.

42. The signal transmission apparatus of claim 38, wherein the uplink data and the uplink grant indicating the uplink data allocation are located in a same time interval.