WO2017166217A1

WO2017166217A1 - Data transmission method and apparatus

Info

Publication number: WO2017166217A1
Application number: PCT/CN2016/078176
Authority: WO
Inventors: 邵家枫; 李超君; 吴作敏; 马莎; 张运玑
Original assignee: 华为技术有限公司
Priority date: 2016-03-31
Filing date: 2016-03-31
Publication date: 2017-10-05

Abstract

Provided are a data transmission method and apparatus, which relate to the technical field of communications and are used for saving transmission resources and reducing network throughput. The method comprises a network device sending first downlink control information (DCI) to a user terminal (UT), wherein the first DCI comprises scheduling information for instructing the UT in a time window, and the time window includes at least one transmission time interval (TTI). After the user terminal receives the first downlink control information (DCI), the user terminal may transmit information on the at least one TTI in the time window according to the scheduling information comprised in the first DCI.

Description

Data transmission method and device

Technical field

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

Background technique

In the current long-term evolution LTE and the advanced long-term evolution LTE-A system, the network device and the user terminal (UT) have a transmission time interval TTI of 1 ms as the basic transmission time interval, that is, uplink transmission and downlink transmission. The transmission time interval is 1ms. When the network device schedules the UT, the network device needs to send all the scheduling information of the TTI to the UT on one TTI. When scheduling the UT again in the next TTI, all the scheduling information with the next TTI still needs to be performed. Send it to the UT again. However, all the scheduling information of the previous TTI sent to the same UT and all the scheduling information of the latter TTI are partially the same. Therefore, when the network device schedules the UT, if it is on each TTI. Sending all scheduling information will result in waste of transmission resources and affect the downstream throughput of the system.

Summary of the invention

Embodiments of the present invention provide a data transmission method and apparatus, which solve the problem of waste of transmission resources in the prior art.

In order to achieve the above object, embodiments of the present invention adopt the following technical solutions:

In a first aspect, a data transmission method is provided for a network device, the method comprising:

Transmitting, by the user terminal UT, first downlink control information DCI, the first DCI includes scheduling information for indicating that the UT is within a time window, and the time window includes at least one transmission time interval TTI.

In combination with the first aspect, in a first possible implementation manner of the first aspect, the method further includes:

Sending, to the UT, first configuration information, where the first configuration information is used to configure a first scheduling mode;

The first scheduling mode is used to indicate that the UT receives the first DCI.

In combination with the first aspect, in a second possible implementation manner of the first aspect, the method further includes:

Sending, to the UT, first configuration information, where the first configuration information is used to configure a second scheduling mode;

The second scheduling mode is used to indicate that the UT receives the first DCI and the second DCI, and the second DCI is used to complete at least one of the following functions:

Trigger the UT to send information,

Used to instruct the UT to receive information,

Used to update at least a portion of the information in the scheduling information.

With reference to the first aspect, in a third possible implementation manner of the first aspect, after the first downlink control information DCI is sent to the user terminal UT, the method further includes:

Transmitting a second DCI to the UT on the first TTI, the first TTI being one of the at least one TTI included in the time window.

In conjunction with the second possible implementation of the first aspect, in a fourth possible implementation manner of the first aspect, after the sending the first DCI to the UT, the method further includes:

When the first configuration information is used to configure the second scheduling mode, the second DCI is sent to the UT on the first TTI, where the first TTI is one of the at least one TTI included in the time window.

With reference to the first aspect, in a fifth possible implementation manner of the first aspect, the method further includes:

Sending control indication information to the UT on the first TTI, where the control indication information is used to indicate whether to send the second DCI on the first TTI, where the first TTI is one TTI in the at least one TTI included in the time window, and the second DCI is used to Complete at least one of the following features:

Trigger the UT to send information,

Used to instruct the UT to receive information,

With the fifth possible implementation of the first aspect, in a sixth possible implementation manner of the first aspect, after the sending the control indication information to the UT on the first TTI, the method further includes:

When the control indication information indicates that the second DCI is sent on the first TTI, the second DCI is sent to the UT on the time-frequency resource in the first TTI, and the information sent by the UT is received according to the first DCI and the second DCI. Sending information to the UT on the first TTI;

When the control indication information indicates that the second DCI is not sent on the first TTI, according to the first DCI, the information sent by the UT is received or the information is sent to the UT on the first TTI.

With reference to the fifth possible implementation of the first aspect, or the sixth possible implementation manner of the first aspect, in a seventh possible implementation manner of the first aspect, the control indication information includes the first indication information or the second Instructions, where

The first indication information is used to indicate that the second DCI is not sent on the first TTI;

The second indication information is used to indicate that the second DCI is sent on the first TTI.

With reference to the fifth possible implementation of the first aspect, to any one of the seventh possible implementation manners of the first aspect, in an eighth possible implementation manner of the first aspect, the method further includes:

Sending, to the UT, second configuration information, where the second configuration information is used to indicate that the control indication information is not sent to the UT on the first TTI, or is used to indicate that the control indication information is sent to the UT on the first TTI.

With reference to the first aspect to any one of the eighth possible implementation manners of the first aspect, in a ninth possible implementation manner of the first aspect, the first DCI further includes information for indicating a TTI length .

With reference to the ninth possible implementation of the first aspect, in a tenth possible implementation manner of the first aspect, the information about the TTI length is used to indicate:

A TTI length, the length of the TTI being the length of time of the TTI included in the time window; or

At least two candidate TTI lengths, wherein a time length of any one of the TTIs included in the time window is one of the at least two candidate TTI lengths; or

At least one TTI length and location information of the TTI included in the time window, the TTI length corresponding to the location information of the TTI included in the time window; and/or

The time length of the at least one physical channel, where the physical channel includes at least one of an uplink data channel, a downlink data channel, an uplink control channel, and a downlink control channel.

With reference to the second possible implementation of the first aspect to any one of the tenth possible implementation manners of the first aspect, in an eleventh possible implementation manner of the first aspect, the method further includes:

When the second DCI is sent to the UT on the first TTI, the resource element RE occupied by the downlink data channel does not include the RE of the time-frequency resource of the second DCI; and/or,

When the second DCI is not sent to the UT in the first TTI, the resource element RE occupied by the downlink data channel includes the RE where the time-frequency resource of the second DCI on the first TTI is located;

The first TTI is one TTI in the at least one TTI included in the time window, and the downlink data channel is used to carry data information sent to the UT on the first TTI.

Combining the second possible implementation of the first aspect with the eleventh possible aspect of the first aspect In a twelfth possible implementation manner of the first aspect, the first DCI is further used to indicate at least one of the following functions:

The RE occupied by the second DCI,

The number of candidate downlink control channels corresponding to the second DCI,

The CCE aggregation level corresponding to the second DCI,

The number of REs occupied by the CCE corresponding to the second DCI,

The format of the second DCI.

With reference to the second possible implementation of the first aspect to any one of the twelfth possible implementation manners of the first aspect, in the thirteenth possible implementation manner of the first aspect, the scheduling information includes The information that triggers the UT to transmit the initial transmission or is used to instruct the UT to receive the initial transmission; and/or,

The second DCI is used to trigger the UT to send information or to instruct the UT to receive information, including: the second DCI is used to trigger the UT to send retransmission information or to indicate that the UT receives the retransmission information.

In combination with the second possible implementation of the first aspect to any one of the thirteenth possible implementations of the first aspect, in a fourteenth possible implementation of the first aspect,

Transmitting the first DCI to the UT, including: transmitting a first DCI to the UT in a downlink control channel region within one subframe, where the downlink control channel region is located in the first 1, 2 or 3 symbols of the one subframe; and/or ,

The length of the first TTI is less than or equal to 0.5 ms.

In combination with the first aspect to any one of the fourteenth possible implementation manners of the first aspect, in the fifteenth possible implementation manner of the first aspect, before the sending the first DCI to the UT, :

Receiving first notification information sent by the UT, the first notification information is used to indicate that the UT has the capability of receiving the second DCI or is used to indicate that the UT has the capability of receiving the first configuration information.

With reference to the first aspect to any one of the fifteenth possible implementation manners of the first aspect, in a sixteenth possible implementation manner of the first aspect, the first downlink control is sent to the UT to the user terminal Before the information DCI, it also includes:

A first DCI is generated based on scheduling information of the UT within a time window.

Combining the third possible implementation of the first aspect with the sixteenth possibility of the first aspect In a seventeenth possible implementation manner of the foregoing aspect, before the sending the second DCI to the UT on the first TTI, the method further includes:

Generate a second DCI.

The second aspect provides a data transmission method, which is applied to a user terminal UT, and the method includes:

Receiving first downlink control information DCI, the first DCI includes scheduling information for indicating information transmission within a time window, and the time window includes at least one transmission time interval TTI.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the method further includes:

Receiving first configuration information, where the first configuration information is used to configure a first scheduling mode;

The first scheduling mode is used to indicate that the first DCI is received.

With reference to the second aspect, in a second possible implementation manner of the second aspect, the method further includes:

Receiving first configuration information, where the first configuration information is used to configure a second scheduling mode;

Trigger the UT to send information,

Used to instruct the UT to receive information,

With reference to the second aspect, in a third possible implementation manner of the second aspect, after receiving the first downlink control information DCI, the method further includes:

The second DCI is received on the first TTI, the first TTI being one of the at least one TTI included in the time window.

With the second possible implementation of the second aspect, in a fourth possible implementation manner of the second aspect, after receiving the first downlink control information DCI, the method further includes:

When the configuration information is used to configure the second scheduling mode, the second DCI is received on the first TTI, where the first TTI is one of the at least one TTI included in the time window.

With reference to the second aspect, in a fifth possible implementation manner of the second aspect, the method further includes:

Receiving control indication information on the first TTI, where the control indication information is used to indicate whether the second DCI is sent on the first TTI, where the first TTI is one TTI in the at least one TTI included in the time window, and the second DCI is used to complete the following functions. At least one of:

Trigger the UT to send information,

Used to instruct the UT to receive information,

With the fifth possible implementation of the second aspect, in a sixth possible implementation manner of the second aspect, after receiving the control indication information on the first TTI, the method further includes:

When the control indication information indicates that the second DCI is sent on the first TTI, receiving the second DCI on the first TTI, transmitting the information according to the first DCI and the second DCI, or receiving the information on the first TTI;

When the control indication information indicates that the second DCI is not transmitted on the first TTI, the information is transmitted or received on the first TTI according to the first DCI.

With reference to the fifth possible implementation of the second aspect, or the sixth possible implementation manner of the second aspect, in a seventh possible implementation manner of the second aspect, the control indication information includes the first indication information or the second Instructions, where

With reference to the fifth possible implementation of the second aspect to any one of the seventh possible implementation manners of the second aspect, in an eighth possible implementation manner of the second aspect, the method further includes:

The second configuration information is received, where the second configuration information is used to indicate that the control indication information is not sent on the first TTI, or is used to indicate that the control indication information is sent on the first TTI.

With reference to any one of the second aspect to the eighth possible implementation manner of the second aspect, in a ninth possible implementation manner of the first aspect, the first DCI further includes information for indicating a TTI length.

With reference to the ninth possible implementation manner of the second aspect, in a tenth possible implementation manner of the second aspect, the information of the TTI length is used to indicate:

A TTI length, a TTI length being the length of time of the TTI included in the time window; or

At least two candidate TTI lengths, wherein the time length of any one of the TTIs included in the time window is one of at least two candidate TTI lengths; or

At least one TTI length and a time window include location information of the TTI, and the TTI length has a correspondence relationship with the location information of the TTI included in the time window; and/or,

The length of time at which at least one physical channel is located, and the physical channel includes an uplink data channel, At least one of a data channel, an uplink control channel, and a downlink control channel.

With reference to the second possible implementation of the second aspect to any one of the tenth possible implementation manners of the second aspect, in an eleventh possible implementation manner of the second aspect, the method further includes:

When receiving the second DCI on the first TTI, the resource element RE occupied by the downlink data channel does not include the RE of the time-frequency resource of the second DCI; and/or,

When the second DCI is not received on the first TTI, the resource element RE occupied by the downlink data channel includes the RE of the time-frequency resource of the second DCI on the first TTI;

The first TTI is one TTI in the at least one TTI included in the time window, and the downlink data channel is used to carry data information received on the first TTI.

With reference to the second possible implementation of the second aspect to any one of the eleventh possible implementation manners of the second aspect, in the twelfth possible implementation manner of the second aspect, the first DCI is further Used to indicate at least one of the following features:

The RE occupied by the second DCI,

The CCE aggregation level corresponding to the second DCI,

The number of REs occupied by the CCE corresponding to the second DCI,

The format of the second DCI.

With reference to the second possible implementation of the second aspect to any one of the twelfth possible implementation manners of the second aspect, in the thirteenth possible implementation manner of the second aspect, the scheduling information includes For triggering the transmission of the initial transmission or for indicating the receipt of the initial transmission; and/or,

The second DCI is used to trigger the sending of the information or to indicate the received information, and the second DCI is used to trigger the information for sending the retransmission or the information for indicating the retransmission.

With reference to any one of the second possible implementation of the second aspect to the thirteenth possible implementation of the second aspect, in a fourteenth possible implementation of the second aspect,

Receiving the first DCI, comprising: receiving a first DCI in a downlink control channel region of one subframe, where the downlink control channel region is located in the first 1, 2 or 3 symbols of the subframe; and/or,

The length of the first TTI is less than or equal to 0.5 ms.

With reference to the second aspect to any one of the fourteenth possible implementation manners of the second aspect, in the fifteenth possible implementation manner of the second aspect, before receiving the first DCI, the method further includes:

Sending first notification information, the first notification information is used to indicate that the capability of receiving the second DCI is Or for indicating the ability to receive the first configuration information, or to indicate the ability to receive the second configuration information.

In a third aspect, a network device is provided, where the network device includes:

And a sending unit, configured to send, to the user terminal, the first downlink control information DCI, where the first DCI includes scheduling information for indicating that the UT is within a time window, and the time window includes at least one transmission time interval TTI.

With reference to the third aspect, in a first possible implementation manner of the third aspect, the sending unit is further configured to send the first configuration information to the UT, where the first configuration information is used to configure the first scheduling mode;

With reference to the third aspect, in a second possible implementation manner of the third aspect, the sending unit is further configured to send the first configuration information to the UT, where the first configuration information is used to configure the second scheduling mode.

Trigger the UT to send information,

Used to instruct the UT to receive information,

With reference to the third aspect, in a third possible implementation manner of the third aspect, the sending unit is further configured to send the second DCI to the UT on the first TTI, where the first TTI is in the at least one TTI included in the time window. One of the TTIs.

With the second possible implementation of the third aspect, in a fourth possible implementation manner of the third aspect, the sending unit is further configured to: when the first configuration information is used to configure the second scheduling mode, at the first The second DCI is sent to the UT on the TTI, where the first TTI is one of the at least one TTI included in the time window.

With reference to the third aspect, in a fifth possible implementation manner of the third aspect, the sending unit is further configured to send, by using the first TTI, control indication information, where the control indication information is used to indicate whether the first TTI is sent. The second DCI is a TTI of the at least one TTI included in the time window, and the second DCI is used to perform at least one of the following functions:

Trigger the UT to send information,

Used to instruct the UT to receive information,

With the fifth possible implementation of the third aspect, in a sixth possible implementation manner of the third aspect, the sending unit is further configured to: when the control indication information indicates that the second DCI is sent on the first TTI, Sending a second DCI to the UT on a time-frequency resource in a TTI, receiving information sent by the UT according to the first DCI and the second DCI, or transmitting information to the UT on the first TTI;

And a sending unit, configured to: when the control indication information indicates that the second DCI is not sent on the first TTI, receive information sent by the UT according to the first DCI or send information to the UT on the first TTI.

With reference to the fifth possible implementation of the third aspect, or the sixth possible implementation manner of the third aspect, in a seventh possible implementation manner of the third aspect, the control indication information includes the first indication information or the second Instructions, where

With reference to the fifth possible implementation of the third aspect to any one of the seventh possible implementation manners of the third aspect, in the eighth possible implementation manner of the third aspect, the sending unit is further used Sending, to the UT, second configuration information, where the second configuration information is used to indicate that the control indication information is not sent to the UT on the first TTI, or is used to indicate that the control indication information is sent to the UT on the first TTI.

With reference to any one of the third aspect to the eighth possible implementation manner of the third aspect, in a ninth possible implementation manner of the third aspect, the first DCI further includes information for indicating a TTI length.

With reference to the ninth possible implementation manner of the third aspect, in a tenth possible implementation manner of the third aspect, the information of the TTI length is used to indicate:

With reference to the second possible implementation of the third aspect to any one of the tenth possible implementation manners of the third aspect, in the eleventh possible implementation manner of the third aspect, when in the first TTI When the second DCI is sent to the UT, the resource element RE occupied by the downlink data channel does not include the RE of the time-frequency resource of the second DCI; and/or,

When the second DCI is not sent to the UT in the first TTI, the resource element RE occupied by the downlink data channel includes the RE of the time-frequency resource of the second DCI on the first TTI;

With reference to the second possible implementation of the third aspect to any one of the eleventh possible implementation manners of the third aspect, in the twelfth possible implementation manner of the third aspect, the first DCI is further Used to indicate at least one of the following features:

The RE occupied by the second DCI,

The CCE aggregation level corresponding to the second DCI,

The number of REs occupied by the CCE corresponding to the second DCI,

The format of the second DCI.

With reference to the second possible implementation of the third aspect to any one of the twelfth possible implementation manners of the third aspect, in the thirteenth possible implementation manner of the third aspect, the scheduling information includes The information that triggers the UT to transmit the initial transmission or is used to instruct the UT to receive the initial transmission; and/or,

With reference to any one of the second possible implementation of the third aspect to the thirteenth possible implementation of the third aspect, in a fourteenth possible implementation of the third aspect,

The sending unit, configured to send the first DCI to the UT, includes: sending a first DCI to the UT in a downlink control channel region in one subframe, where the downlink control channel region is located in the first 1, 2, or 3 of the one subframe Symbol; and/or,

The length of the first TTI is less than or equal to 0.5 ms.

With reference to any one of the fourteenth possible implementation manners of the third aspect to the third aspect, in the fifteenth possible implementation manner of the third aspect, the network device further includes:

And a receiving unit, configured to receive first notification information sent by the UT, where the first notification information is used to indicate that the UT has the capability of receiving the second DCI or is used to indicate that the UT has the capability of receiving the first configuration information.

With reference to any of the fifteenth possible implementation manners of the third aspect to the third aspect, in the sixteenth possible implementation manner of the third aspect, the network device further includes:

And a processing unit, configured to generate a first DCI according to the scheduling information of the UT in the time window.

With reference to the third possible implementation of the third aspect to any one of the sixteenth possible implementation manners of the third aspect, in the seventeenth possible implementation manner of the third aspect, the processing unit is further Used to generate a second DCI.

In a fourth aspect, a user terminal is provided, where the user terminal includes:

The receiving unit is configured to receive first downlink control information DCI, where the first DCI includes scheduling information for indicating information transmission in a time window, and the time window includes at least one transmission time interval TTI.

With reference to the fourth aspect, in a first possible implementation manner of the fourth aspect, the receiving unit is further configured to receive the first configuration information, where the first configuration information is used to configure the first scheduling mode;

The first scheduling mode is used to indicate that the first DCI is received.

With reference to the fourth aspect, in a second possible implementation manner of the fourth aspect, the receiving unit is further configured to receive the first configuration information, where the first configuration information is used to configure the second scheduling mode;

Trigger the UT to send information,

Used to instruct the UT to receive information,

With reference to the fourth aspect, in a third possible implementation manner of the fourth aspect, the receiving unit is further configured to receive the second DCI on the first TTI, where the first TTI is one of the at least one TTI included in the time window. .

With reference to the second possible implementation manner of the fourth aspect, in a fourth possible implementation manner of the fourth aspect, the receiving unit is further configured to: when the configuration information is used to configure the second scheduling mode, The second DCI is received on the first TTI, where the first TTI is one of the at least one TTI included in the time window.

With reference to the fourth aspect, in a fifth possible implementation manner of the fourth aspect, the receiving unit is further configured to receive control indication information, where the control indication information is used to indicate whether the second DCI is sent on the first TTI. The first TTI is one of at least one TTI included in the time window, and the second DCI is used to perform at least one of the following functions:

Trigger the UT to send information,

Used to instruct the UT to receive information,

With reference to the fifth possible implementation manner of the fourth aspect, in a sixth possible implementation manner of the fourth aspect, the receiving unit is further configured to: when the control indication information indicates that the second DCI is sent on the first TTI, Receiving a second DCI on a TTI, transmitting information according to the first DCI and the second DCI, or receiving information on the first TTI;

The receiving unit is further configured to: when the control indication information indicates that the second DCI is not sent on the first TTI, send information according to the first DCI or receive information on the first TTI.

With reference to the fifth possible implementation manner of the fourth aspect, or the sixth possible implementation manner of the fourth aspect, in a seventh possible implementation manner of the fourth aspect, the control indication information includes the first indication information or the second Instructions, where

With reference to any one of the fifth possible implementation of the fourth aspect to the seventh possible implementation of the fourth aspect, in an eighth possible implementation manner of the fourth aspect, the receiving unit is further configured to: The second configuration information is received, where the second configuration information is used to indicate that the control indication information is not sent on the first TTI, or is used to indicate that the control indication information is sent on the first TTI.

With reference to any one of the fourth aspect to the eighth possible implementation manner of the fourth aspect, in a ninth possible implementation manner of the fourth aspect, the first DCI further includes information for indicating a TTI length.

With reference to the ninth possible implementation manner of the fourth aspect, in a tenth possible implementation manner of the fourth aspect, the information of the TTI length is used to indicate:

A TTI length, a TTI length being the length of time of the TTI contained in the time window; or By,

The length of time at which the physical channel is located, the physical channel includes at least one of an uplink data channel, a downlink data channel, an uplink control channel, and a downlink control channel.

With reference to the second possible implementation of the fourth aspect to any one of the tenth possible implementation manners of the fourth aspect, in the eleventh possible implementation manner of the fourth aspect, when in the first TTI When the second DCI is received, the resource element RE occupied by the downlink data channel does not include the RE of the time-frequency resource of the second DCI; and/or,

With reference to the second possible implementation of the fourth aspect to any one of the eleventh possible implementation manners of the fourth aspect, in the twelfth possible implementation manner of the fourth aspect, the first DCI is further Used to indicate at least one of the following features:

The RE occupied by the second DCI,

The CCE aggregation level corresponding to the second DCI,

The number of REs occupied by the CCE corresponding to the second DCI,

The format of the second DCI.

With reference to the second possible implementation of the fourth aspect to any one of the twelfth possible implementation manners of the fourth aspect, in the thirteenth possible implementation manner of the fourth aspect, the scheduling information includes For triggering the transmission of the initial transmission or for indicating the receipt of the initial transmission; and/or,

With reference to any one of the second possible implementation of the fourth aspect to the thirteenth possible implementation of the fourth aspect, in a fourteenth possible implementation manner of the fourth aspect,

The receiving unit, configured to receive the first DCI, includes: receiving, in a downlink control channel region of one subframe, a first DCI, where the downlink control channel region is located in the first 1, 2, or 3 symbols of the subframe; and/or,

The length of the first TTI is less than or equal to 0.5 ms.

With reference to any one of the fourteenth possible implementation manners of the fourth aspect to the fourth aspect, in the fifteenth possible implementation manner of the fourth aspect, the user terminal further includes:

a sending unit, configured to send first notification information, where the first notification information is used to indicate that the device has the capability of receiving the second DCI, or is used to indicate that the device has the capability of receiving the first configuration information, or is configured to indicate that the second configuration information is received. ability.

In a fifth aspect, a network device is provided, the network device comprising a processor and a memory, wherein the memory stores code and data, the processor can execute code in the memory, and the processor is configured to execute the first aspect to the tenth aspect of the first aspect A data transmission method as described in any of the seven possible implementations.

In a sixth aspect, a user terminal is provided, the user terminal comprising a processor and a memory, the memory stores code and data, the processor can execute code in the memory, and the processor is configured to execute the tenth to the second aspect of the second aspect A data transmission method as claimed in any of the five possible implementations.

According to a seventh aspect, a communication system is provided, the communication system comprising the network device of the fifth aspect, and the user terminal of the sixth aspect.

The data transmission method and apparatus provided by the embodiment of the present invention, the network device sends the first downlink control information DCI to the user terminal UT, where the first DCI includes scheduling information for indicating that the UT performs information transmission in the time window, time The window includes at least one transmission time interval TTI, so that the UT is configured with information transmission on the at least one TTI. When the user terminal receives the first DCI, the user terminal may perform information transmission according to the scheduling information included in the first DCI, thereby The network device does not need to send scheduling information once per TTI, which saves transmission resources, and also reduces downlink throughput and increases the rate of data transmission.

DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments or the prior art description will be briefly described below. Obviously, the following description The drawings in the drawings are only some of the embodiments of the present invention, and those skilled in the art can obtain other drawings according to the drawings without any creative work.

1 is a system architecture diagram of a communication system according to an embodiment of the present invention;

2 is a schematic structural diagram of a base station according to an embodiment of the present invention;

3 is a schematic structural diagram of a baseband subsystem according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a user terminal according to an embodiment of the present disclosure;

FIG. 5 is a schematic flowchart diagram of a first data transmission method according to an embodiment of the present disclosure;

FIG. 6 is a schematic flowchart diagram of a second data transmission method according to an embodiment of the present disclosure;

FIG. 7 is a schematic flowchart diagram of a third data transmission method according to an embodiment of the present invention;

FIG. 8 is a schematic flowchart diagram of a fourth data transmission method according to an embodiment of the present disclosure;

FIG. 9 is a schematic flowchart diagram of a fifth data transmission method according to an embodiment of the present disclosure;

FIG. 10 is a schematic flowchart diagram of a sixth data transmission method according to an embodiment of the present disclosure;

FIG. 11 is a schematic flowchart diagram of a seventh data transmission method according to an embodiment of the present disclosure;

FIG. 12 is a schematic flowchart diagram of an eighth data transmission method according to an embodiment of the present disclosure;

FIG. 13 is a schematic flowchart diagram of a ninth data transmission method according to an embodiment of the present disclosure;

FIG. 14 is a schematic diagram of a relationship between a first DCI and a second DCI according to an embodiment of the present invention;

FIG. 15 is a schematic structural diagram of a physical resource block according to an embodiment of the present disclosure;

FIG. 16 is a schematic structural diagram of another physical resource block according to an embodiment of the present disclosure;

FIG. 17 is a schematic structural diagram of a network device according to an embodiment of the present disclosure;

FIG. 18 is a schematic structural diagram of another network device according to an embodiment of the present disclosure;

FIG. 19 is a schematic structural diagram of still another network device according to an embodiment of the present disclosure;

FIG. 20 is a schematic structural diagram of a user terminal according to an embodiment of the present disclosure;

FIG. 21 is a schematic structural diagram of still another user terminal according to an embodiment of the present disclosure;

FIG. 22 is a schematic structural diagram of another network device according to an embodiment of the present disclosure;

FIG. 23 is a schematic structural diagram of another user terminal according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, those of ordinary skill in the art are not All other embodiments obtained under the premise of creative work are within the scope of the invention.

"Multiple" as referred to herein means two or more. "and/or", describing the association relationship of the associated objects, indicating that there may be three relationships, for example, A and/or B, which may indicate that there are three cases where A exists separately, A and B exist at the same time, and B exists separately. The symbol "/" generally indicates that the contextual object is an "or" relationship.

Before introducing the present invention, a brief introduction will be made to the technical terms involved in the embodiments of the present invention.

The downlink control channel may be replaced by at least one of the following: a Short Physical Downlink Control Channel (SPDCCH), a Physical Downlink Control Channel (PDCCH), or other used for transmitting downlink control information. Physical channel.

The downlink data channel can be replaced by at least one of the following: a Short Physical Downlink Share Channel (SPDSCH), a Physical Downlink Share Channel (PDSCH), or other information for transmitting downlink data. Physical channel.

The uplink control channel may be replaced by at least one of the following: a Short Physical Uplink Control Channel (SPUCCH), a Physical Uplink Control Channel (PUCCH), or other used for transmitting uplink control information. Physical channel.

The uplink data channel can be replaced by at least one of the following: a Short Physical Uplink Share Channel (SPUSCH), a Physical Uplink Share Channel (PUSCH), or other information for transmitting uplink data. Physical channel.

A time window is used to indicate a unit in time, the time window includes at least one TTI, and the at least one TTI may be time-continuous or time-interval. For example, the time window contains four TTIs of 2 symbol lengths. If the TTIs of the four 2-symbol time lengths can be temporally continuous, then (symbol 2, symbol 3) corresponds to the first TTI, (symbol 4, symbol 5) corresponds to the second TTI, (symbol 6, symbol 7) corresponds to the third TTI, (symbol 8, symbol 9) corresponds to the fourth TTI; if the four 2 symbol time length between the TTI If there is a time interval, then (symbol 2, symbol 3) corresponds to the first TTI, (symbol 6, symbol 7) corresponds to the second TTI, (symbol 8, symbol 9) corresponds to the third TTI, (symbol 10 , symbol 11) corresponds to the fourth TTI. The length of a TTI may be greater than or equal to the length of one symbol, such as 1 symbol, 2 symbols, 3 symbols, 4 symbols, 7 symbols, or 14 symbols. The symbol is a symbol of an LTE system in which the frequency domain of the subcarrier is 15 kHz, or a symbol of a communication system in which the frequency domain of one subcarrier is greater than 15 kHz. The frequency domain in which the frequency domain of one subcarrier is greater than 15 kHz may be 30 kHz, 60 kHz, and 120 kHz, which is not limited in this embodiment. The meaning of a symbol is equivalent to an OFDM symbol or an SC-FDMA symbol. The symbol is an orthogonal frequency division multiplexing multiple access OFDMA symbol, a single carrier frequency division multiple access SC-FDMA symbol of an LTE system with a 15 kHz subcarrier spacing, or a symbol of a communication system with a larger subcarrier occupied frequency, this embodiment is This is not limited. The information indicating the time window is carried in the control channel sent by the network device, such as in the first DCI, or may be carried in the high layer signaling, such as RRC (Radio Resource Control) signaling, or may be Is pre-defined, such as an integer multiple of the length of the TTI indicated by the TTI length information, or the length of 14 symbols, or an integer multiple of 14 symbols, or (14-control region occupied symbols) symbols The length, or (14-control area occupied by the control region) integer multiples of the length of the symbol. It can be understood that if the information indicating the time window is carried in the first DCI, it will not be carried in the second DCI. The time window may be a time unit corresponding to the transmission or reception of the data information, or may be a time unit corresponding to the second DCI transmission time.

The first TTI refers to one of the at least one TTI included in the time window, and all TTIs included in the time window may be used as the first TTI, or some of the TTIs may be used as the first TTI.

The first downlink control information (DCI), that is, the first DCI, is used to indicate that the user terminal (UT) performs scheduling information transmission in a time window, where the scheduling information includes the following information. At least one of the following: the indication information of the resource, the power command word of the uplink data channel or the uplink control channel, the information of the TTI length, the information of the second DCI, the MCS (Modulation and Coding Scheme), and the like. In the present invention, the first DCI may be replaced by a first downlink control channel and a slow downlink control channel. In an embodiment of the invention, the scheduling information for indicating that the UT is transmitting information within the time window is equivalent to the control information for instructing the UT to transmit information within the time window.

The second downlink control information, that is, the second DCI, is used to trigger the UT to transmit information, and/or to instruct the UT to receive the information, and/or to update at least one of the scheduling information. In the present invention, the second DCI may be replaced by a second downlink control channel or a fast downlink control channel.

The information to be sent may be at least one of an uplink control channel, an uplink data channel, a Sounding Reference Signal (SRS), and an Uplink Control Information (UCI); the received information may be a downlink control channel, and downlink data. At least one of the channels.

The system architecture of the communication system to which the embodiments of the present invention are applied is as shown in FIG. 1. The system architecture diagram includes a network device 101, a user terminal 102, and a communication channel 103.

The network device 101 may be a base station, having a scheduling function of a shared channel, and having a history based on the history of packet data sent to the user terminal 102. The scheduling is that when a plurality of user terminals 102 share transmission resources, a mechanism is needed. The physical layer resources are effectively allocated to obtain statistical multiplexing gain.

The user terminal 102 may be a plurality of user terminals, and the user terminal 102 has a function of transmitting and receiving data through a communication channel 103 established with the network device 101. The user terminal 102 performs transmission or reception processing of the shared channel based on the information transmitted through the scheduling control channel. In addition, the user terminal 102 may be a mobile station, a mobile phone, a computer, a portable terminal, or the like, and the types of the user terminals 102 may be the same or different.

The network device 101 and the user terminal 102 perform data reception and transmission through the communication channel 103. The communication channel 103 may be a wireless communication channel, and in the wireless communication channel, at least a shared channel and a scheduling control channel exist, and the shared channel is for The packet is transmitted and received and shared among the plurality of user terminals 102, and the scheduling control channel is used to transmit the allocation of the shared channel, the corresponding scheduling result, and the like.

2 is a hardware structural diagram of a network device according to an embodiment of the present invention. The network device is described by taking a base station as an example. As shown in FIG. 2, the base station includes a baseband subsystem, a middle radio frequency subsystem, and an antenna feed subsystem. And some supporting structures (for example, a whole subsystem), wherein the baseband subsystem is used to implement operation and maintenance of the entire base station, implement signaling processing, radio resource principle, and transmission interface to an EPC (Evolved Packet Core) Implement LTE physical layer, MAC (Medium Access Control) layer, L3 signaling, operation and maintenance main control function; the middle RF subsystem realizes conversion between baseband signal, intermediate frequency signal and radio frequency signal, realizing Demodulation of LTE wireless received signals and modulation and power amplification of the transmitted signals; the antenna feeder subsystem includes antennas and feeders connected to the base station radio frequency module and antennas and feeders of the GRS receiving cards for receiving and transmitting wireless air interface signals; The whole subsystem is the supporting part of the baseband subsystem and the intermediate frequency subsystem, providing structure, power supply and environmental monitoring functions.

The baseband subsystem can be as shown in FIG. 3: for example, the mobile phone accesses the Internet through the base station to access the core network (MME/S-GW), and accesses the Internet through the core network, where the data of the Internet passes through the core network and the base station. The interface is passed to the baseband part, and the baseband part performs PDCP, RLC, MAC layer, coding, modulation, etc., and is sent to the radio frequency part for transmission to the user terminal. The baseband and the radio frequency can be connected through the CPRI interface; in addition, the radio frequency part can be pulled far by the optical fiber, for example, the remote RRU. The baseband of each step of the data transmission method in the embodiment of the present invention is implemented by radio frequency, and the receiving and transmitting step is implemented by an antenna (for example, an air interface).

The interface between the user terminal and the base station involved in the implementation of the present invention may be understood as an air interface for communication between the user terminal and the base station, or may also be referred to as a Uu interface.

4 is a schematic structural diagram of a user terminal according to an embodiment of the present invention. The user terminal may be a user equipment. For example, the user equipment may be a mobile phone, a tablet computer, a notebook computer, or a UMPC (Ultra-mobile Personal Computer). A computer, a netbook, a PDA (Personal Digital Assistant), and the like. The embodiment of the present invention uses a UT as a mobile phone as an example, and FIG. 4 shows a block diagram of a partial structure of a mobile phone related to various embodiments of the present invention. .

As shown in FIG. 4, the mobile phone includes: a memory, a processor, an RF (radio frequency) circuit, and a power supply. It will be understood by those skilled in the art that the structure of the handset shown in FIG. 4 does not constitute a limitation to the handset, and may include more or less components than those illustrated, or some components may be combined, or different components may be arranged.

The following describes the components of the mobile phone in detail with reference to FIG. 4:

The memory can be used to store software programs and modules, and the processor executes various functional applications and data processing of the mobile phone by running software programs and modules stored in the memory. The memory may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application required for at least one function, and the like; the storage data area may store data created according to usage of the mobile phone, and the like. Further, the memory may include a high speed random access memory, and may also include a nonvolatile memory or the like.

The processor is the control center of the mobile phone, and connects various parts of the entire mobile phone by using various interfaces and lines, and executes each mobile phone by running or executing software programs and/or modules stored in the memory, and calling data stored in the memory. The function and processing of data to monitor the phone as a whole. Optionally, the processor may include one or more processing units; preferably, the processor may integrate an application processor and a modem processor, where the application processor mainly processes an operating system, a user interface, an application, etc., and modulates The demodulation processor primarily handles wireless communications.

The RF circuit can be used to send and receive information or receive and transmit signals during a call. Generally, RF circuits include, but are not limited to, an antenna, at least one amplifier, a transceiver, a coupler, an LNA (low noise amplifier), a duplexer, and the like. In addition, the RF circuit can communicate with the network and other devices through wireless communication. The wireless communication may use any communication standard or protocol, including but not limited to GSM (global system of mobile communication), GPRS (general packet radio service), CDMA (code division multiple access) , code division multiple access), WCDMA (wideband code division multiple access), LTE (long term evolution), e-mail, SMS (short messaging service), and the like.

The mobile phone also includes a power source (such as a battery) that supplies power to various components. Preferably, the power source can be connected to the processor logic through the power management system to manage functions such as charging, discharging, and power management through the power management system.

Although not shown, the mobile phone may further include an input unit, a display unit, a sensor module, an audio module, a WiFi (wireless fidelity) module, a Bluetooth module, and the like, and details are not described herein.

FIG. 5 is a data transmission method according to an embodiment of the present invention. The interaction entity of the method is a network device and a user terminal UT. Referring to FIG. 5, the method includes the following steps.

Step 201: The network device sends first downlink control information DCI to the user terminal UT, where the first DCI includes scheduling information indicating that the UT is within a time window, and the time window includes at least one transmission time interval TTI.

The scheduling information may also be control information, including some scheduling or control information, such as PMI (Precoding Matrix Indicator), RBA (Resource Block Assignment), and MCS (Modulation and Coding Scheme, Modulation and coding strategies).

Optionally, the number of the at least one TTI is N, and the network device sends, to the UT, scheduling information used to indicate that the UT performs information transmission in a time window formed by the N TTIs, where the network device uses N TTIs. The scheduling information of the information transmission is sent to the UT at one time, and the scheduling information is not required to be sent to each of the T TTIs. Of course, the network device may also be in the N TTIs during the information transmission process. The preset information transmission on each TTI is changed.

Optionally, the location information of the at least one TTI or the time window may be carried on a control channel sent by the network device, such as in the first DCI, or may be carried on a high layer signaling, such as RRC (Radio Resource). Control, Radio Resource Control) signaling, or may be predefined.

Optionally, the time window includes that the at least one TTI may be continuous or discontinuous. For example, the time window includes 3 TTIs, each TTI has a length of 2 symbols, the first TTI is located at symbol 2 and symbol 3, the second TTI is at symbol 4 and symbol 5, and the third TTI is at symbol 6 and symbol 7. Or, the first TTI is in symbol 2 and symbol 3, the second TTI is in symbol 6 and symbol 7, and the third TTI is in symbol 11 and symbol 12.

Further, before the network device sends the first DCI to the user terminal UT, the network device may further generate the first DCI according to the scheduling information of the UT in the time window. The scheduling information includes at least one of the following information: indication information of the resource, a power command word of the uplink data channel or the uplink control channel, information of the TTI length, information of the second DCI, MCS, NDI. The network device multiplexes the original information to be transmitted in the first DCI, and then performs CRC (Cyclic Redundancy Check) addition, then performs channel coding, and finally performs rate matching, thereby generating a first DCI. Wherein, when the CRC is added, the CRC is scrambled by a UT-ID (UT-Identifier User Terminal Identity) or a C-RNTI (Cell-Radio Network Temporary Identifier) common to a group of user terminals, then A DCI can be received by the set of user terminals; the CRC is scrambled with a UT-ID or C-RNTI common to a user terminal, and then the first DCI can be received only by the user terminal.

Step 202: The UT receives the first downlink control information DCI.

Optionally, after the UT receives the first DCI, the UT may perform information transmission in a time window according to the scheduling information indicated by the first DCI, that is, the UT may include the TTI in the time window according to the first DCI. Send information to the network device, or according to the first DCI Receiving information sent by the network device on the TTI included in the time window.

It should be noted that the first DCI in the step 202 is the same as the first DCI in the foregoing step 201, and details are not described herein again.

For example, when the UT receives scheduling information indicating that the UT performs information transmission within a time window formed by N TTIs, the UT may perform information transmission according to the scheduling information. Of course, during information transmission, the UT may The UT may also receive the change information sent by the network device for the information transmission on each of the N TTIs, and perform information transmission according to the corresponding change information.

Further, referring to FIG. 6, before step 201, the method further includes:

Step 203: The network device sends first configuration information to the UT, where the first configuration information is used to configure the second scheduling mode.

The second scheduling mode is used to indicate that the UT receives the first DCI and the second DCI, where the second DCI is used to complete at least one of the following functions: triggering the UT to send information, indicating that the UT receives information, for Update at least a portion of the information in the scheduling information.

Further, the method further includes: the network device sends the first configuration information to the UT, where the first configuration information is used to configure the first scheduling mode, where the first scheduling mode is used to indicate that the UT receives the first DCI.

Optionally, the first configuration information may be carried on a network device sending control channel, such as in a first DCI, or may be carried on a high layer signaling, such as RRC (Radio Resource Control) signaling. Or it can be pre-defined. The first configuration information may be configured according to the load condition of the system or the capability of the UT, and the UT supports receiving only the first DCI or receiving the first DCI and receiving the second DCI, so as to achieve a flexible control system without affecting the scheduling UT. Control signaling overhead and improve system transmission resource efficiency.

Optionally, the network device receives the first notification information sent by the UT, where the first notification information is used to indicate that the UT has the capability of receiving the second DCI, or is used to indicate that the UT has the capability of receiving the first configuration information, or The UT is instructed to have the ability to receive the second configuration information. Further, the first notification information is used to indicate that the UT does not have the capability of receiving the second DCI or is used to indicate that the UT does not have the capability of receiving the first configuration information. It should be noted that, before receiving the first configuration information, the first configuration information may be sent after the first configuration information is sent, that is, when the first notification information is not received. It should be noted that receiving the first The notification information may be before the second configuration information is sent, or after the second configuration information is sent, that is, the second configuration information is sent when the first notification information is not received. It should be noted that the first notification information may also be used to indicate that the UT has the capability of receiving or transmitting information when the length of the TTI is less than or equal to 1 ms. At this time, implicitly defaulting the UT has the ability to receive the second DCI, or has the ability to receive the first configuration information, or have the ability to receive the second configuration information. The first notification information may be used to notify the UT to support receiving the second DCI or the first configuration information or the second configuration information according to the load condition of the system or the capability of the UT, so as to achieve flexible control system control without affecting the scheduling UT. Signaling overhead improves system transmission resource efficiency.

Optionally, the first notification information may be carried on a UT transmission data channel, such as an uplink data channel, or may be carried on a control channel, such as an uplink control channel.

Optionally, according to the first DCI sending information, the information may be sent on the first TTI or sent on other TTIs included in the time window. According to the first DCI and the second DCI sending information, the information may be sent on the first TTI or the other TTI included in the time window.

Optionally, according to the first DCI sending information, the information sent by the UT may be received on the first TTI or the second TTI with a time interval after the first TTI included in the time window. According to the first DCI and the second DCI sending information, the information sent by the UT may be received on the first TTI or the second TTI having the time interval after the first TTI included in the time window. The time interval between the second TTI and the first TTI may be predetermined first, or indicated by the first DCI, or indicated by the second DCI. The value of the time interval may be an integer symbol greater than or equal to zero.

Optionally, the first TTI may be indicated by the first DCI.

Step 204: The UT receives first configuration information, where the first configuration information is used to configure a second scheduling mode.

Further, when the network device sends the first configuration information to the UT, where the first configuration information is used to configure the first scheduling mode, the method further includes: the UT receiving the first configuration information, where the first configuration information is used. Configure the first scheduling mode.

Optionally, the UT sends the first notification information to the network device, where the first notification information is used to indicate that the UT has the capability of receiving the second DCI or is used to indicate that the UT has the capability of receiving the first configuration information. Further, the first notification information is used to indicate that the UT does not have the capability of receiving the second DCI, or is used to indicate that the UT does not have the capability of receiving the second configuration information, or is used to indicate The UT does not have the ability to receive second configuration information. It should be noted that, before the first configuration information is received, the first notification information may be sent after the first configuration information is received, or after the first configuration information is sent, that is, when the first notification information is not received. Configuration information. It should be noted that, before receiving the second configuration information, the second configuration information may be sent after the second configuration information is sent, that is, when the first notification information is not received.

It should be noted that, in the step 204, the first scheduling mode and the second scheduling mode of the first configuration information are consistent with the first scheduling mode and the second scheduling mode of the first configuration information in the foregoing step 203, and the embodiment of the present invention does not Let me repeat.

Further, referring to FIG. 7, after step 201, the method further includes:

Step 205a: The network device sends a second DCI to the UT on the first TTI. The second DCI is used to complete at least one of the following functions: triggering the UT to send information, indicating that the UT receives information, and is used to update at least a part of the information in the scheduling information; that is, the second DCI can be used. The UT sending information is triggered separately, or is used to indicate that the UT receives the information, or is used to update at least one of the scheduling information, and may also be used to trigger the UT to send information, and is used to indicate that the UT receives the information. And the at least one of the information for updating the scheduling information, or for triggering any two of the foregoing, which is not limited by the embodiment of the present invention.

Optionally, the scheduled information includes information used to trigger the UT to send the initial transmission or to indicate that the UT receives the initial transmission; and/or, the second DCI is used to trigger the UT to send information or to indicate the UT. Receiving the information includes: the second DCI is used to trigger the UT to send retransmission information or to indicate that the UT receives the retransmission information. Specifically, the scheduling information includes: information for triggering the UT to send the initial transmission, where the second DCI is used to trigger the UT to send the information, where the second DCI is used to trigger the UT to send the retransmitted information. The scheduling information includes: information for indicating that an initial transmission sent by the UT is received, and the second DCI is used to indicate that the UT receives the information, and is used to: indicate information for receiving a retransmission sent by the UT.

Wherein, in the first HARQ process ID, the previous transmission information that triggers the UT to transmit information or the previous reception information that indicates the UT reception information is referred to as the first information transmission, and the UT is triggered in the same first HARQ process number. Sending information or instructing the UT to receive information is referred to as a second information transmission. New data indication in the scheduling information corresponding to the second information transmission (New data Indicator, NDI) When the NDI in the scheduling information corresponding to the first information transmission is inconsistent, the second information transmission is the initial information; the NDI and the first information in the scheduling information corresponding to the second information transmission When the NDI in the corresponding scheduling indication information is transmitted, the second information transmission is retransmitted information. If there is no first information transmission, the second information transmission must be the initial information. The present invention is not limited to information indicating retransmission and initial transmission, that is, it may be NDI, or may be other methods.

Optionally, receiving the first DCI, including: receiving the first DCI in a downlink control channel region of a subframe, where the downlink control channel region is located in the first 1, 2 or 3 symbols of the subframe; and/or The length of the first TTI is less than or equal to 0.5 ms. It can be understood that the first DCI is only received on the control region control region, and/or the second DCI is only received on the shorter TTI. Optionally, the network device receives the first notification information sent by the UT, where the first notification information is used to indicate that the UT has the capability of receiving the second DCI, or is used to indicate that the UT has the capability of receiving the first configuration information, or The UT is instructed to have the ability to receive the second configuration information. Further, the first notification information is used to indicate that the UT does not have the capability of receiving the second DCI or is used to indicate that the UT does not have the capability of receiving the first configuration information. It should be noted that, before receiving the first notification information, the second DCI may be sent after the second DCI is sent, that is, when the first notification information is not received.

It should be noted that when the second DCI is used to trigger the UT to send information, it may be used to indicate that the UT sends information on the fourth TTI after the first TTI, or may be after multiple TTIs from the first TTI. The information is sent on any TTI, which is not limited by the embodiment of the present invention; when the second DCI is used to indicate that the UT receives information, it is used to indicate that the UT receives information on the first TTI.

Further, before the network device sends the second DCI to the UT, the method further includes: the network device generating the second DCI. The network device multiplexes the original information to be transmitted in the second DCI, and then performs CRC (Cyclic Redundancy Check) addition, then performs channel coding, and finally performs rate matching, thereby generating a second DCI. Wherein, when the CRC is added, the CRC uses a UT-ID (UT-Identifier User Terminal Identity) or a C-RNTI (Cell-Radio Network Temporary Identifier) common to a group of user terminals. Network temporary identification) scrambling, then the second DCI can be received by the group of user terminals; the CRC is scrambled with a UT-ID or C-RNTI common to a user terminal, then the second DCI can be only used by the user terminal receive.

Step 206a: The UT receives the second DCI on the first TTI. Optionally, the UT sends the first notification information to the network device, where the first notification information is used to indicate that the UT has the capability of receiving the second DCI, or is used to indicate that the UT has the capability of receiving the first configuration information, or is used for Indicates that the UT does not have the ability to receive second configuration information. Further, the first notification information is used to indicate that the UT does not have the capability of receiving the second DCI, or is used to indicate that the UT does not have the capability of receiving the first configuration information, or is used to indicate that the UT does not have the second configuration information. Ability. It should be noted that the sending of the first notification information may be before receiving the second DCI, or after receiving the second DCI, that is, when the first notification information is not sent.

It should be noted that the second DCI in step 206a is consistent with the second DCI in step 205a, and details are not described herein again.

It should be noted that the method for transmitting and receiving the second DCI according to the foregoing steps 205a and 206a is performed when the network device does not send the first configuration information, that is, the network device and the UT can directly follow the steps. 201-202, and steps 205a-206a implement data transfer between the network device and the UT.

Correspondingly, if the network device sends the first configuration information according to step 203, and the UT receives the first configuration information according to step 204, referring to FIG. 8, the network device sends the second DCI, and the UT receives the second DCI. Specifically, as described in steps 205b-206b.

Step 205b: When the first configuration information is used to configure the second scheduling mode, the network device sends a second DCI to the UT on the first TTI, where the first TTI is one TTI in the at least one TTI included in the time window.

Optionally, when the network device sends the first configuration information to the UT, and the first configuration information is used to configure the first scheduling mode, the network device sends the first DCI to the UT in step 201, specifically: when the first When the configuration information is used to configure the first scheduling mode, the network device sends the first DCI to the UT.

Step 206b: When the first configuration information is used to configure the second scheduling mode, the UT receives the second DCI on the first TTI.

Specifically, when the first configuration information is used to configure the second scheduling mode, the UT may be in time The second DCI is received on the first TTI included in the window. Since the second scheduling mode is used to indicate that the information is sent according to the first DCI and the second DCI, or is used to indicate that the information sent by the UT is received according to the first DCI and the second DCI, after the UT receives the second DCI, The UT may receive information sent by the network device according to the first DCI and the second DCI, or send information to the network device according to the first DCI and the second DCI.

Optionally, when the network device sends the first configuration information to the UT, and the first configuration information is used to configure the first scheduling mode, the receiving, by the UT, the first DCI in the step 202 is specifically: if the first configuration information is used. In configuring the first scheduling mode, the UT receives the first DCI. Since the first scheduling mode is used to indicate that the information is sent according to the first DCI, or is used to indicate that the information sent by the UT is received according to the first DCI, after the UT receives the first DCI, the UT may receive the network according to the first DCI. The information sent by the device or sent to the network device according to the first DCI.

Correspondingly, if the network device receives the first notification information and sends the first configuration information according to step 203, and the UT sends the first notification information according to step 204 and receives the first configuration information, referring to FIG. 9, the network device sends the first The two DCIs, and the method by which the UT receives the second DCI are specifically as described in steps 205c-206c.

Step 205c: When the first configuration information is used to configure the second scheduling mode and the first notification information is used to indicate that the UT has the capability of receiving the second DCI, the network device sends the second DCI to the UT on the first TTI.

Optionally, when the first configuration information is used to configure the first scheduling mode, and the first notification information is used to indicate that the UT has the capability of receiving the second DCI, or the first notification information is used to indicate that the UT does not have the second DCI. The capability of the network device to send the first DCI to the UT in step 201 is specifically: the network device sends the first DCI to the UT, that is, the network device does not send the second DCI to the UT on the first TTI.

Step 206c: When the first configuration information is used to configure the second scheduling mode and the first notification information is used to indicate that the UT has the capability of receiving the second DCI, the UT receives the second DCI on the first TTI included in the time window.

Optionally, when the first configuration information is used to configure the first scheduling mode, and the first notification information is used to indicate that the UT has the capability of receiving the second DCI, or the first notification information is used to indicate that the UT does not have the second DCI. The capability of the UT to receive the first DCI is specifically as follows: The UT receives the first DCI sent by the network device, that is, the UT does not receive the second DCI on the first TTI.

It should be noted that, in the embodiment of the present invention, the first TTI is one TTI in the at least one TTI included in the time window. The first TTI may be indicated by the first DCI.

Further, in the embodiment of the present invention, when data transmission between the network device and the UT is implemented according to the method described in steps 201-206c, the first DCI may further include information for indicating a TTI length. By indicating the information of the TTI length, the network device can configure different TTI lengths for the UT according to the service requirements and delay requirements of the UT to meet the requirements of different UTs, thereby improving system resource usage efficiency.

The transmission period x ms of the first DCI, x is a positive integer, for example, x=1ms, 2ms, 5ms, 10ms), or m symbols, and m is a positive integer greater than or equal to 7. Optionally, the sending period is configured by pre-definable or high-level signaling, such as RRC (Radio Resource Control) signaling.

In addition, when the information of the TTI length is specifically the length of the TTI, it may be used to indicate different TTI lengths of (1)-(5), and the information of the TTI length has a certain effective time/duration/cycle, that is, the TTI length. The effective time/duration/period y ms of the information, y is a positive integer, for example, x = 1 ms, 2 ms, 5 ms, 10 ms), or i symbols, i is a positive integer greater than or equal to 7. That is, the information of the TTI length does not change during this period until a new first DCI or a new effective time/duration/cycle is received. The effective time/duration/period of the information of the TTI length may be greater than the transmission period of the first DCI, or may be less than or equal to the transmission period of the first DCI. Optionally, the effective time/duration/period of the TI length information is pre-definable or high-layer signaling configuration, such as RRC (Radio Resource Control) signaling. The UT/network device determines the effective time/duration/period of the TTI length corresponding to the information of the TTI length according to the information of the TTI length and the effective time/duration/period of the information of the TTI length. The details are as follows.

(1) A TTI length, a TTI length is the length of time of the TTI included in the time window: that is, the time window includes the same length of time for each TTI, and is the indicated TTI length.

For example, the TTI length information is used to indicate that the one type of TTI is 1 symbol, 2 symbols, 3 symbols or 4 symbols, 0.5 ms or 7 symbols, 1 ms or 14 symbols. For specific indication methods, refer to Tables 1 to 5 below. Among them, Table 1, Value 10 corresponds Three symbols and/or four symbols, Value 10 can correspond to three symbols, or four symbols, or three symbols corresponding to four symbols. That is, corresponding to 3 symbols and corresponding to 4 symbols can be understood as a TTI length. Further, since a 1 ms subframe contains 14 symbols, the TTI length of the 1 ms subframe can be 4343, or 3434. Or a TTI sequence structure of 3344, or 4433, or 4334, or 3443, wherein 4343 represents a TTI with a TTI sequence structure of 4 symbols in 1 ms, a TTI of 3 symbols, a TTI of 4 symbols, 3 symbols The TTI, if the indicated TTI length is corresponding to 3 symbols, also corresponds to 4 symbols, that is, the TTI length and the TTI sequence structure in one subframe are one of the above examples.

It should be noted that the correspondence between the value of the TTI length information and the indicated time length or the table may be pre-defined or high-level signaling, and is not limited here, that is, as high-level signaling, then according to the upper layer. The Value 00 indicated by the signaling may correspond to 2 symbols instead of 1 symbol. The value of the information of at least one TTI length in the above Table 1, and/or the value of the information of at least one TTI length in Table 2, and/or the value of the information of at least one TTI length in Table 3, and/or a table The value of the information of at least one TTI length in 4, and/or the value of the information of at least one TTI length in Table 5 may be combined into a new TTI length information table. The high layer signaling, such as RRC (Radio Resource Control).

Among them, 0.5ms can be replaced by 7 symbols or 6 symbols; 1ms can be replaced by 14 symbols or 12 symbols.

Table 1

Table 2

table 3

Table 4

table 5

(2) at least two candidate TTI lengths, wherein a time length of any one of the TTIs included in the time window is one of the at least two candidate TTI lengths. Further, the UT or the network device determines, according to the second DCI and the at least two candidate TTI lengths, a time length that includes a TTI in the time window, where the second DCI includes a TTI length indicating one of the TTI lengths of the at least two candidates. The information is selected; that is, the length of the specific TTI included in the time window may be selected from the at least two candidate TTI lengths according to the second DCI. The length of the TTI may be different from the length of the TTI indicated by the second DCI, that is, the time length of the TTI included in the time window may be different; or the length of the TTI may correspond to each TTI included in the time window. The length of time, that is, the length of time for each TTI included in the time window is the same. The TTI length selection information included in the second DCI includes a first candidate time length and a second candidate time length. If the information of the TTI length included in the first DCI is value 00, the first candidate time length is 1 symbol, and the second candidate time length is 2 symbols. The at least two candidate TTI lengths may be the same or different. It can be understood that when the lengths of the at least two candidate TTIs are the same, that is, the lengths of all the candidate TTIs are the same, the UT may determine, according to the information of the TTI length, only the length of time in the time window including the TTI, without determining according to the second DCI. The time window contains the length of time of the TTI.

It should be noted that the correspondence between the value of the information of the TTI length included in the first DCI and the TTI length of the at least two candidates may be pre-defined or high-level signaling, and is not limited herein. That is, as high-level signaling, then according to high-level signaling The value 00 shown may correspond to 3 symbols or 4 symbols instead of 1 symbol or 2 symbols. The values of the information of the two candidate TTI lengths in Table 6 below, and/or the values of the information of the three candidate TTI lengths in Table 7, the values of the information of the TTI lengths of the unequal-length candidates in Table 8, and/or The values of the TTI length selection information included in the second DCI in Table 9, and/or the values of the TTI length selection information included in the second DCI in Table 10 may be combined into a new TTI length information table.

Table 6

Table 7

Table 8

Table 9

Table 10

(3) at least one TTI length and location information of the TTI included in the time window, where the TTI length has a correspondence relationship with the location information of the TTI included in the time window. Further, the UT determines, according to the location information of the TTI and the at least one TTI length, a time length of the TTI included in the time window, and the corresponding relationship is predefined, or is reported by a high layer signaling; that is, the time window includes The length of each TTI may be the same or different, and the specific TTI length of each TTI included in the time window may be determined according to the sequence information of the TTI position and the at least one TTI length, but the correspondence is predefined, or higher layer signaling. Notified, such as RRC (Radio Resource Control) signaling. For example, the location information of the TTI is the first TTI, the second TTI, the third TTI, the ....., the Nth TTI, where the symbols of the TTI are consecutive or discontinuous. , depending on whether the symbols occupied by the time window are continuous. As shown in Table 11 below, the length of the Nth TTI is determined according to the bit information field indicating the length of the Nth TTI.

Table 11

第一DCI包含的TTI长度的信息The length of the TTI included in the first DCI	TTI长度TTI length
第一个TTI长度比特信息域First TTI length bit information field	3个符号3 symbols
第二个TTI长度比特信息域Second TTI length bit information field	4个符号4 symbols
第三个TTI长度比特信息域Third TTI length bit information field	1个符号1 symbol

第四个TTI长度比特信息域Fourth TTI length bit information field	2个符号2 symbols
..............
第N个TTI长度比特信息域Nth TTI length bit information field	1ms1ms

(4) At least one TTI length, the TTI length corresponding to the location information of the TTI included in the time window, and the location information of the TTI included in the time window is pre-defined or high-level signaling.

It should be noted that at least one TTI length in (4) is similar to at least one TTI length in (3) above, but the difference is that the location information of the TTI in (3) is indicated by information of the TTI length. And the location information of the TTI in (4) is predefined, or is reported by higher layer signaling.

(5) The length of time at which the physical channel is located, the physical channel comprising at least one of an uplink data channel, a downlink data channel, an uplink control channel, and a downlink control channel. That is, the length of time of the TTI where at least one physical channel is located. Further, the UT or the network device determines the length of time the physical channel is located according to the type of the physical channel on the TTI included in the time window; that is, one physical channel corresponds to one TTI length, and different physical channels may correspond to the same Or different TTI lengths. For example, the length of the downlink data channel may be 1 symbol or 2 symbols or 3 symbols or 0.5 ms or 1 ms; the length of the uplink data channel may be 1 symbol or 2 symbols or 3 symbols or 0.5 ms or 1 ms.

It should be noted that the length of time at which the at least one physical channel is located is specifically the length of time in which the uplink control channel is located and the length of time in which the downlink data channel is located. The length of time of the TTI where the at least one physical channel is located is specifically the length of time of the TTI where the uplink control channel is located and the length of time of the TTI where the downlink data channel is located. For example, the length of time for the sPUCCH is 3 symbols and/or 4 symbols, and the length of time for the sPDSCH is 1 symbol.

It should be noted that the correspondence between the value of the TTI length information included in the first DCI and the TTI length of the indicated physical channel may be pre-defined or high-level signaling, which is not limited herein. As indicated by the high layer signaling, the downlink data channel indicated by the high layer signaling may correspond to 3 symbols or 4 symbols, and may also correspond to 1 symbol or 2 symbols. It can be understood that the length of the TTI in which all the physical channels are indicated, as shown in Table 12-Table 15 below, may only indicate one or a combination of the downlink data channel, the downlink control channel, the uplink control channel, and the uplink data channel. .

Table 12

第一DCI包含的TTI长度的信息The length of the TTI included in the first DCI	TTI长度TTI length
下行数据信道Downlink data channel	1个符号1 symbol
下行控制信道Downlink control channel	1个符号1 symbol
上行控制信道Uplink control channel	1个符号1 symbol
上行数据信道Uplink data channel	2个符号2 symbols

Table 13

第一DCI包含的TTI长度的信息The length of the TTI included in the first DCI	TTI长度TTI length
下行数据信道 Downlink data channel	2个符号2 symbols
上行数据信道 Uplink data channel	4或3个符号4 or 3 symbols

Table 14

第一DCI包含的TTI长度的信息The length of the TTI included in the first DCI	TTI长度TTI length
下行数据信道 Downlink data channel	2个符号2 symbols
上行控制信道Uplink control channel	0.5ms0.5ms

Table 15

It should be noted that the information of the TTI length is specifically used for the content of the indication (5), and the relationship between the above (1) and (4) is “and/or”, that is, the information of the TTI length is specifically used for In addition to any of the above five types, the indication may be information in which any one of (1) to (4) is combined with (5). The UT or network device is based on a physical letter on the TTI included in the time window The length of the channel and the length information of the TTI of (1-4) determine the length of time of the TTI where the physical channel is located. Taking the combination of (5) and (1) as an example, if the first DCI is the indicated TTI length, the candidate TTI length is 2 symbols, and the indicated downlink data channel is 2 symbols or 0.5 ms. Then, the downlink data channel is transmitted only on the TTI with a length of 2 symbols.

It should be noted that, if the number of symbols occupied by the first TTI is greater than one symbol, and the network device sends the second DCI to the UT on the first TTI, the second DCI is only sent on the first symbol of the first TTI. Compared with the second DCI distribution over the entire TTI, the advantage is that the UT can perform DCI demodulation as early as possible, saving UT processing time. Further, if the second DCI of the multiple UTs is not carried on one symbol, the alternative is: if the number of symbols occupied by the first TTI is greater than 1 symbol, the network device sends the second to the UT on the first TTI. In the case of DCI, the symbol index of the second DCI in the first TTI is indicated by the first DCI or higher layer signaling, that is, the UT or the network device determines the symbol index of the second DCI according to the first DCI or higher layer signaling, thereby The flexibility is maintained, and the location of the second DCI can be flexibly configured according to the system load.

Further, when the network device sends the second DCI to the UT on the first TTI, the resource element RE occupied by the time-frequency resource of the second DCI belongs to the RE included in the downlink data channel, and the part included in the downlink data channel The RE is preset to the second DCI. In order to ensure that the UT correctly receives the downlink data channel, and the rate matching error does not occur, it is required to determine whether the resource element RE occupied by the downlink data channel includes the time-frequency resource of the second DCI. RE, the specific method is as follows.

When the network device sends the second DCI to the UT on the first TTI, the resource element RE occupied by the downlink data channel does not include the RE of the time-frequency resource of the second DCI; when the network device is in the first TTI included in the time window When the second DCI is not sent to the UT, the resource element RE occupied by the downlink data channel includes the RE where the time-frequency resource of the second DCI on the first TTI is located.

Correspondingly, if the user terminal receives the second DCI on the first TTI, it determines that the resource element RE occupied by the downlink data channel does not include the RE of the time-frequency resource of the second DCI; if the second DCI is not received in the first TTI Or determining, according to the control indication information, that the first TTI included in the time window does not send the second DCI, determining that the resource element RE occupied by the downlink data channel includes the RE where the time-frequency resource of the second DCI on the first TTI is located.

It should be noted that the time-frequency resource of the second DCI may be carried on the network device sending control channel, such as the first DCI or the control indication information, or may be carried on the high layer signaling. For example, in RRC (Radio Resource Control) signaling, or it may be predefined. The time-frequency resource of the second DCI may be a resource in a time domain frequency domain resource on the first TTI. Time-frequency resources include: time domain resources and frequency domain resources.

Optionally, the time domain resource is a symbol, a symbol group, a slot, or a subframe, where the symbol is a symbol of an LTE system in which the frequency domain of the subcarrier is 15 kHz. Is a symbol of a communication system in which the subcarrier is located in the frequency domain greater than 15 kHz; the time slot is a time slot of an LTE system in which the frequency domain of one subcarrier is 15 kHz, or a communication in which the frequency domain of one subcarrier is greater than 15 kHz The time slot of the system may be less than 0.5 ms in length; the subframe is a subframe of an LTE system in which the frequency domain of the subcarrier is 15 kHz, or a subframe of a communication system in which the frequency domain of one subcarrier is greater than 15 kHz, and the length may be It is less than 1 ms, which is not limited in this embodiment. For example, the frequency domain in which the frequency domain of one subcarrier is greater than 15 kHz may be 30 kHz, 60 kHz, and 120 kHz, which is not limited in this embodiment.

Optionally, the frequency domain resource is a short physical resource block (SPRB), a short physical resource block group (SRBG), a short virtual resource block (SVRB), and a short virtual resource block (SVRB). Carrier or subcarrier group. Among them, SPRB and SVRB are the basic units for resource allocation of different meanings. The SPRB is 12 consecutive subcarriers in the frequency domain. In the time domain, it is a resource with a transmission time length. The transmission time length can be from 1 symbol to any number of symbols in 14 symbols. In the centralized resource allocation, SVRB and SPRB. The definition is the same. SVRB has a certain correspondence with SPRB in distributed resource allocation. The SPRB index is an SPRB index, and the SVRB index is an SVRB index. Therefore, the SPRB index and the SVRB index may be different. The SRBG may include multiple SPRBs, and the number of SPRBs included in the SRBG is determined according to the bandwidth of the terminal device or is indicated by the network device. The SPRB index may be the number of the SPRB, the SRBG index may be the number of the SRBB, the SVRB index may be the number of the SVRB, the subcarrier index may be the number of the subcarrier, and the subcarrier group index may be the number of the subcarrier group. The subcarrier group includes at least one subcarrier, where one subcarrier is located in a frequency domain equal to or greater than 15 kHz.

Optionally, the second DCI is further used to instruct the UT to release the indication information of the preset information transmission corresponding to the first HARQ process ID in the buffer. Further, the second DCI is further used to indicate the first HARQ process ID. It should be noted that the resource element RE occupied by the downlink data channel includes the RE where the time-frequency resource of the second DCI is located, and can be understood as: for each antenna port used for downlink transmission of the physical data channel, the complex-valued symbol block

Should be mapped into a sequence, the mapping starts at y ^(p) (0) to the resource element RE(k,l), and in the short physical resource block (short PRB) configured for the UT, the UT assumes that there is no second DCI transmission, these resource elements RE(k, l) include the RE where the time-frequency resource of the second DCI is located. Further, the mapping of the resource elements RE(k, l) at the antenna port p should be in the following increasing order: in the short physical resource block (short PRB) configured for the UT, the subcarrier index k is first increased, and then The symbol index l is incremented, and the symbol index starts from the first symbol of the first TTI.

It should be noted that the resource element RE occupied by the downlink data channel does not include the RE where the time-frequency resource of the second DCI is located, and can be understood as: for each antenna port for the downlink channel data channel transmission of the physical channel, the complex-valued symbol block

Should be mapped into a sequence, the mapping starts at y ^(p) (0) to the resource element RE(k,l), and in the short physical resource block (short PRB) configured for the UT, it is assumed that the UT does not use these resource elements RE ( k, l) transmitting the second DCI, these resource elements RE(k, l) do not include the RE where the time-frequency resource of the second DCI is located. Further, the mapping of the resource elements RE(k, l) at the antenna port p should be in the following increasing order: in the short physical resource block (short PRB) configured for the UT, first increase the subcarrier index or the frequency domain. Index k, then increase the symbol index or time domain index l, the symbol index starts from the first symbol of the first TTI. among them,

Is the number of modulation symbols used to transmit one physical channel at each antenna port, and y ^(p) (0) is a complex-valued symbol block with an index of 0 after modulation of antenna port p.

Further, the first DCI is further used to indicate at least one of the following functions: an RE occupied by the second DCI, a number of candidate downlink control channels corresponding to the second DCI, a CCE aggregation level corresponding to the second DCI, and a second DCI corresponding The number of REs occupied by the CCE, the format of the second DCI. It can be understood that the network device or the UT determines at least one of the following according to the first DCI: the RE occupied by the second DCI, the number of candidate downlink control channels corresponding to the second DCI, and the CCE aggregation level corresponding to the second DCI, The number of REs occupied by the CCE corresponding to the second DCI, and the format of the second DCI. Optionally, the first DCI is further used to indicate the RE occupied by the second DCI, and specifically, the first DCI is further used to indicate a pattern of the RE occupied by the second DCI. Optionally, the number of candidate downlink control channels corresponding to the second DCI, where the number of candidate downlink control channels may be the second DCI blind detection number, or the candidate number of the second DCI. Further, the network device or the UT determines the time-frequency resource occupied by the second DCI according to the above information. That is, the first DCI may indicate a change in the time-frequency resource of the second DCI. It should be noted that the network device can The time-frequency resource of the second DCI is changed according to the number of scheduled users, the channel quality of the user, or the amount of information of the second DCI, and the time-frequency resource can be saved compared to the time-frequency resource of the predefined second DCI. purpose. At least one of the following: the RE of the second DCI, the number of candidate downlink control channels corresponding to the second DCI, the CCE aggregation level corresponding to the second DCI, and the RE occupied by the CCE corresponding to the second DCI. The number and the format of the second DCI can reduce the number of blind detections of the second DCI by the UT.

Further, referring to FIG. 10, the method further includes:

Step 207: The network device sends HARQ feedback resource information to the UT, where the HARQ feedback resource information includes a first HARQ feedback resource and a second HARQ feedback resource.

The first HARQ feedback resource and the second HARQ feedback resource are ACK/NACK feedback resources. The network device may be notified by a physical channel, such as RRC (Radio Resource Control) signaling, such as the first DCI or higher layer signaling. Corresponding relationship between the HARQ feedback resource and the detection result of the UT, the correspondence is pre-defined or high-level signaling, and the detection result includes whether the second DCI is detected, and/or the received downlink data channel is The RE that occupies the time-frequency resource of the second DCI, that is, the correspondence includes the mapping relationship between the detection result and the first HARQ feedback resource and the second HARQ feedback resource. For example, the first HARQ feedback resource may be the first uplink control channel resource, and the second HARQ feedback resource may be the second uplink control channel resource. The format of the uplink control channel is not limited, and may be the uplink control channel format 1a/1b. It can also be in other formats.

For example, the correspondence may be that the UT detects the second DCI and/or the received downlink data channel does not occupy the RE of the second DCI time-frequency resource, corresponds to the first HARQ feedback resource, and the UT does not detect the second DCI and And/or the received downlink data channel occupies the RE of the time-frequency resource of the second DCI, and corresponds to the second HARQ feedback resource; that is, when the UT detects the second DCI and/or determines that the received downlink data channel is not occupied. The RE of the time-frequency resource of the second DCI transmits the HARQ response information on the first HARQ feedback resource, if the UT does not detect the second DCI and/or determines that the received downlink data channel occupies the RE of the second DCI time-frequency resource Then, the HARQ response information is sent on the second HARQ feedback resource. Of course, the correspondence between the first HARQ feedback resource and the second HARQ feedback resource may also be exchanged, which is not limited in this embodiment of the present invention.

Step 208: The UT receives HARQ feedback resource information.

It should be noted that the HARQ feedback resource information in step 214 is consistent with the HARQ feedback resource information in step 213, and details are not described herein again.

Step 209: The UT determines HARQ feedback resource information corresponding to the detection result according to the detection result and the correspondence.

After the UT receives the HARQ feedback resource information, the UT may select the HARQ feedback resource information corresponding to the detection result of the HARQ according to the HARQ feedback resource information and the corresponding relationship, and return the HARQ feedback information on the corresponding corresponding HARQ feedback resource information. To feed back the test results to the network device.

That is, if the first HARQ feedback resource corresponds to the UT that the UT detects the second DCI and/or determines that the received downlink data channel does not occupy the time-frequency resource of the second DCI, then the UT detects the second DCI and/or Or determining that the received downlink data channel does not occupy the RE of the time-frequency resource of the second DCI, and then sending the HARQ response information on the first HARQ feedback resource; otherwise, transmitting the HARQ response information on the second HARQ feedback resource. Further, if the UT detects the second DCI and/or determines that the received downlink data channel does not occupy the RE of the time-frequency resource of the second DCI, sends ACK/NACK feedback information on the first HARQ feedback resource; if the UT detects And sending ACK/NACK feedback information on the second HARQ feedback resource to the second DCI and/or determining that the received downlink data channel does not occupy the RE of the time-frequency resource of the second DCI.

Step 210: The network device receives the HARQ feedback information, and determines the detection result of the UT according to the HARQ feedback resource information and the correspondence.

The mapping relationship between the first HARQ feedback resource and the second HARQ feedback resource may be: Determining the detection result of the UT feedback, and then determining whether the detection result of the UT feedback is related to whether the second DCI is actually sent to the UT before, and/or the downlink data channel occupies the RE of the time-frequency resource of the second DCI. Whether the detection result of the UT feedback is correct, that is, whether the UT receives the correct and/or whether the correct rate matching is performed, so that the UT is further scheduled and instructed according to whether the detection result of the UT feedback is correct. The network device can identify the receiving condition of the UT through different HARQ feedback resource information, thereby avoiding the problem that the information transmission continues to fail when there is an inconsistency between the network device sending and the UT receiving.

Further, if the detection result of the UT feedback is related to the second DCI or the transmission sent by the network device When the condition that the downlink data channel occupies the RE of the time-frequency resource of the second DCI is inconsistent, the network device sends the first DCI or the second DCI to the UT, where the NDI carried in the first DCI or the second DCI and the downlink data are scheduled. The NDI in the DCI of the channel is inconsistent, and the first HARQ process ID carried in the first DCI or the second DCI is the same as the first HARQ process ID in the DCI. It can be understood that the indication information used to instruct the UT to release the previous data corresponding to the first HARQ process ID in the buffer. The network device can solve the problem of avoiding the continuous failure of the information transmission by instructing to release the content in the buffer and releasing the information of the rate matching error.

It should be noted that the method for determining whether the detection result of the UT is correct according to the steps 207-210 is applicable to the data transmission method shown in any one of the foregoing FIG. 5 to FIG. 9. The method shown in FIG. 10 is as shown in FIG. The method described is described as an example. In addition, in the foregoing step 207, the network device sends the HARQ feedback resource information to the UT, and the step 208 of the UT receiving the HARQ feedback resource information and the foregoing steps 201-206 have no sequence, and the steps 207-208 need only be before the steps 209-210. The embodiment of the present invention does not limit this.

A data transmission method is provided by the network device. The network device sends the first downlink control information DCI to the user terminal UT, where the first DCI includes scheduling information for indicating that the UT performs information transmission in the time window, and the time window. Include at least one transmission time interval TTI to configure information transmission on the UT for at least one TTI, after which the network device passes the second DCI to the UT, the second DCI is used to complete at least one of the following functions: triggering the UT The sending information is used to indicate that the UT receives the information, and is used to update at least part of the information in the scheduling information, and further schedule or change the scheduling information of the UT, so that the scheduling information in the first DCI and the second DCI can be implemented. For the UT scheduling, using the second DCI instead of using all the scheduling information or all the old scheduling information, the resource utilization efficiency can be improved while reducing the control signaling overhead. At the same time, the network device solves the problem of rate matching error by indicating whether the RE occupied by the downlink data channel that is sent includes the RE where the second DCI is located, and also saves transmission resources.

FIG. 11 is a schematic flowchart diagram of another data transmission method according to an embodiment of the present invention. Referring to FIG. 11, the method includes the following steps.

Step 301: The network device sends a first downlink control information DCI to the user terminal UT, where the first DCI includes scheduling information indicating that the UT is within a time window, and the time window includes at least one transmission time interval TTI.

Further, before the network device sends the first DCI to the user terminal UT, the network device may further generate the first DCI according to the scheduling information of the UT in the time window. It should be noted that the method for generating the first DCI by the network device is the same as the method for generating the first DCI in the previous embodiment. For details, refer to the previous embodiment, and details are not described herein again.

Step 302: The UT receives the first downlink control information DCI.

It should be noted that the steps 301-302 are the same as the above-mentioned steps 201-202 in the embodiment, and the embodiments of the present invention are not described herein again.

It should be noted that, in the embodiment of the present invention, the first TTI is one TTI in the at least one TTI included in the time window, and the first TTI may be indicated by the first DCI.

Step 303: The network device sends control indication information to the UT on the first TTI, where the control indication information is used to indicate whether the second DCI is sent on the first TTI. The second DCI is used to complete at least one of the following functions: triggering the UT to send information, indicating that the UT receives information, and is used to update at least a part of the information in the scheduling information.

Optionally, the control indication information includes first indication information or second indication information, where the first indication information is used to indicate that the second DCI is not sent on the first TTI, and the second indication information is used to indicate that the second TTI is sent on the second TTI. DCI. For example, as shown in the following Table 16, the control indication information includes 1-bit information, and the control indication information includes first indication information or second indication information. Value 0 corresponds to the first indication information, and Value 1 corresponds to the second indication information; and vice versa.

Table 16

控制指示信息Control instruction	第一指示信息或第二指示信息First indication information or second indication information
00	第一指示信息First indication
11	第二指示信息Second indication

Optionally, the control indication information is scrambled by the UT-ID or the C-RNTI. That is, the network device sends the control indication information of the UT to the UT, and the sent control indication information is one of the first indication information or the second indication information. When there are multiple UTs, the network device needs to separately send control indication information corresponding to each UT to each UT.

Further, the control indication information may further include at least two information fields, where one information domain corresponds to a group of UTs, the UT is one UT of one of the UTs, and one information field includes first indication information or second indication information. The first indication information is used to indicate that a group of UTs corresponding to one information domain does not send the second DCI on the first TTI, and the second indication information is used to indicate one. A group of UTs corresponding to the information fields send the second DCI on the first TTI; that is, when the network device sends the control indication information to the UT, the control indication information is scrambled by the UT group identifier or the group RNTI, and the network device can The control indication information of the group UT is sent to a group of UTs, and the sent control indication may include both the first indication information and the second indication information, and the set of UTs may include multiple UTs. When there are multiple groups of UTs, the network device can send control indication information to multiple groups of UTs through the correspondence between multiple information fields and multiple groups of UTs, that is, the transmission of multiple groups of UTs can be completed, and the control indication information is saved. Overhead. The correspondence may be predefined, or reported by higher layer signaling, or indicated by the first DCI. For example, the UT determines the correspondence according to the first DCI or the high layer signaling, that is, whether the UT belongs to the first group UT or the second group UT, and further if the UT receives the control indication information, determining according to the control indication information and the correspondence relationship. What is received is the first indication information or the second indication information. Here, there may be a plurality of groups, and the number of groups is not limited in the present invention, that is, there may be a third group UT corresponding to the third bit information field. For example, as shown in Table 17 below, the control indication information includes 2-bit information, and the control indication information includes at least two information fields, and one information domain corresponds to a group of UTs.

Table 17

Optionally, the control indication information includes third indication information, fourth indication information, fifth indication information, or sixth indication information. The third indication information is used to indicate that the UT does not send the second DCI on the first TTI, and the UT receives the first DCI, and the UT determines the scheduling information of the UT on the first TTI according to the first DCI. Further, the network device sends a downlink data channel to the UT according to the first DCI, and the resource element RE occupied by the downlink data channel includes the RE where the time-frequency resource of the second DCI is located;

The fourth indication information is used to indicate that the UT sends the second DCI on the first TTI, and the UT receives the first DCI, and the UT determines scheduling information of the UT on the first TTI according to the first DCI. Further, the network device sends a downlink data channel to the UT on the first TTI according to the first DCI and the second DCI, and the resource element RE occupied by the downlink data channel does not include the RE where the time-frequency resource of the second DCI is located;

The fifth indication information is used to instruct the UT to send the second DCI on the first TTI, the UT does not receive the first DCI, or the UT determines, according to the first DCI, that the UT does not have the scheduling information on the first TTI. Further, the network device sends a downlink data channel to the UT according to the second DCI, and the resource element RE occupied by the downlink data channel does not include the RE where the time-frequency resource of the second DCI is located;

The sixth indication information is used to indicate that all UTs do not have a second DCI on the first TTI.

For example, as shown in the following Table 18, the control indication information includes 2 bits of information, and the control indication information includes at least one of the third indication information, or the fourth indication information, or the fifth indication information, or the sixth indication information. If the control indication information includes the third indication information to the sixth indication information, the Value 00 corresponds to the third indication information, the Value 01 corresponds to the fourth indication information, the Value 10 corresponds to the third indication information, and the Value 11 corresponds to the fourth indication information. The corresponding relationship or the table of the value and the indication information may be pre-defined or high-level signaling, and is not limited here, that is, as the high-level signaling notification, the value 00 according to the high-level signaling may correspond to the fifth indication information. Instead of the third indication.

Table 18

It should be noted that the second DCI in the step 303 is the same as the second DCI in the step 205a of the foregoing embodiment, and details are not described herein again.

Step 304: The UT receives control indication information on the first TTI.

It should be noted that the control indication information in step 304 is consistent with the control indication information in step 303 above, and the embodiment of the present invention is not described herein.

Optionally, when the control indication information includes the first indication information or the second indication information, the network device sends the control indication information to each UT when the control indication information is sent, and the sent control indication information is the first indication information. Or one of the second indication information. When there are multiple UTs, the network device needs to separately send control indication information corresponding to each UT to each UT.

Further, the control indication information may further include at least two information fields, one information domain corresponding to a group of UTs, the UT being one UT of one group of UTs, and one information field containing first indication information or second indication information; That is, the network device may send control indication information of the group of UTs to a group of UTs, and the sent control indication may include both the first indication information and the second indication information, and the set of UTs may include multiple UTs. When there are multiple groups of UTs, the network device can send control indication information to multiple groups of UTs through the correspondence between multiple information fields and multiple groups of UTs, that is, the transmission of multiple groups of UTs can be completed, and the control indication information is saved. Overhead. The correspondence may be predefined, or reported by higher layer signaling, or indicated by the first DCI. For example, the UT determines the correspondence according to the first DCI or the high layer signaling, that is, whether the UT belongs to the first group UT or the second group UT, and further if the UT receives the control indication information, determining according to the control indication information and the correspondence relationship. What is received is the first indication information or the second indication information. Here, there may be a plurality of groups, and the number of groups is not limited in the present invention, that is, there may be a third group UT corresponding to the third bit information field.

It should be noted that, regardless of whether the control indication information includes the first indication information or the second indication information, or includes at least two information fields, one information field corresponds to a group of UTs, and one information field includes first indication information or second indication information. For the UT, the control indication information received by the UT can only be the first indication information or the second indication information.

Further, the control indication information may include the first indication information and the second indication information, and the first indication information is used to indicate that the second DCI is not sent on the first TTI, and the second indication information is sent on the first TTI, according to Different control indication information, the subsequent execution steps are also different. Therefore, the following is respectively described that the control indication information is the first indication information and the control indication information is the second indication information.

First, the control indication information is the first indication information, that is, indicating that the first TTI is not Send the second DCI and perform steps 305A-306A.

Step 305A: When the control indication information indicates that the second DCI is not sent on the first TTI, the network device receives the information sent by the UT according to the first DCI or sends a downlink data channel to the UT on the first TTI.

Step 306A: When the control indication information indicates that the second DCI is not sent on the first TTI, the UT sends information to the network device according to the first DCI or receives the downlink data channel sent by the network device on the first TTI.

Second, the control indication information is the second indication information, that is, indicating that the second DCI is sent on the first TTI, and then steps 305B-306B are performed.

Step 305B: When the control indication information indicates that the second DCI is sent on the first TTI, the network device sends the second DCI to the UT on the first TTI, and receives the information sent by the UT according to the first DCI and the second DCI. A downlink data channel is transmitted to the UT on the first TTI.

Further, when the control indication information indicates that the second DCI is sent on the first TTI, before the network device sends the second DCI to the UT on the first TTI, the method further includes: the network device generating the second DCI. It should be noted that the method for generating the second DCI by the network device is the same as the method for generating the second DCI in the previous embodiment. For details, refer to the previous embodiment, and details are not described herein again.

It should be noted that the time-frequency resource of the second DCI may be set in advance, and the frequency domain resource occupied by the one CCE includes an integer multiple of 36 subcarriers or 9 subcarriers, and the CCE aggregation level may be 1, 2, 4, 8 or other values, for example, a CCE occupies a frequency domain resource of 36 subcarriers, and a second DCI time-frequency resource occupies a CCE aggregation level of 2, and the CCE corresponding time-frequency resource is 72 subcarriers, and the subcarriers of the CCE are The location may be continuous or intermittent. For the CCE aggregation level or specific location, it may be indicated by the control indication information, indicated by the first DCI, or defined by the higher layer signaling, or predefined. For example, if the first DCI includes the CCE aggregation level corresponding to the second DCI, the UT determines the CCE aggregation level corresponding to the second DCI according to the first DCI.

Step 306B: When the control indication information indicates that the second DCI is sent on the first TTI, the UT receives the second DCI on the first TTI, and sends information according to the first DCI and the second DCI or receives the downlink on the first TTI. Data channel.

Optionally, if the control indication information includes the third indication information, the fourth indication information, and the fifth The indication information or the sixth indication information, the corresponding subsequent execution steps are different due to different control indication information, and therefore, the control indication information is the third indication information, the fourth indication information, the fifth indication information or The sixth indication information is explained.

When the control indication information is the third indication information, when the UT receives the third indication information, it is determined that the second DCI is not sent on the first TTI, and the second DCI does not need to be detected on the first TTI. After receiving the first DCI, the UT determines scheduling information of the UT on the first TTI according to the first DCI, and performs information transmission according to the scheduling information of the UT. Further, if the network device sends the downlink data channel to the UT according to the first DCI, and the resource element RE occupied by the downlink data channel includes the RE where the time-frequency resource of the second DCI is located, the UT is in the downlink. When the data channel is rate matched, the RE of the matched downlink data channel includes the RE of the time-frequency resource of the second DCI, that is, the RE of the second DCI time-frequency resource is not punctured when the rate is matched;

When the control indication information is the fourth indication information, when the UT receives the fourth indication information, it is determined that the second DCI is sent on the first TTI, and the second DCI needs to be detected on the first TTI. After receiving the first DCI, the UT determines scheduling information of the UT on the first TTI according to the first DCI, and performs information transmission according to the scheduling information of the UT. Further, if the network device sends a downlink data channel to the UT according to the first DCI and the second DCI, and the RE occupied by the downlink data channel does not include the RE where the time-frequency resource of the second DCI is located, the UT When rate matching is performed on the downlink data channel, the RE occupied by the matched downlink data channel does not include the RE where the time-frequency resource of the second DCI is located, that is, the RE of the time-frequency resource of the second DCI when the rate is matched. Punch

When the control indication information is the fifth indication information, when the UT receives the fifth indication information, it determines that the second DCI is sent on the first TTI, and the second DCI needs to be detected on the first TTI; The UT does not receive the first DCI or the UT determines that there is no scheduling information for the UT on the first TTI according to the first DCI. Further, if the network device sends the downlink data channel to the UT according to the second DCI, and the resource element RE occupied by the downlink data channel does not include the RE of the second DCI time-frequency resource, the UT is in the downlink. When the data channel performs rate matching, the RE occupied by the matched downlink data channel does not include the RE of the second DCI time-frequency resource, that is, the RE of the second DCI time-frequency resource is punctured at the time of rate matching. ;

When the control indication information is the sixth indication information, the UT determines that the second DCI does not exist in the first TTI when the sixth indication information is received, that is, the UT does not need to detect the first TTI. .

Optionally, the scheduling information includes information used to trigger the sending of the initial transmission or information used to indicate the initial transmission; and/or the second DCI is used to trigger the sending of the information or to indicate the received information, including: for the second DCI. To trigger the transmission of retransmission information or to indicate the reception of retransmission information. Specifically, the scheduling information includes: information used to trigger the sending of the initial transmission, where the second DCI is used to trigger the sending of the information, where the second DCI is used to trigger the sending of the retransmission information. The scheduling information includes: information indicating that the initial transmission of the transmission is received, and the second DCI is used to indicate that the received information includes: or information used to indicate that the retransmission of the transmission is received.

Wherein, in the first HARQ process ID, the previous transmission information that triggers the transmission of the information or the previous reception information that indicates the received information is referred to as the first information transmission, and the same first HARQ process number triggers the transmission of the information or the indication of the received information. It is called the second information transmission. When the new data indicator (NDI) in the scheduling information corresponding to the second information transmission is inconsistent with the NDI in the scheduling information corresponding to the first information transmission, the second information transmission is the initial information; When the NDI in the scheduling information corresponding to the second information transmission is consistent with the NDI in the scheduling indication information corresponding to the first information transmission, the second information transmission is retransmitted information. If there is no first information transmission, the second information transmission must be the initial information. The present invention is not limited to information indicating retransmission and initial transmission, that is, it may be NDI, or may be other methods.

Optionally, receiving the first DCI, including: receiving the first DCI in a downlink control channel region in a subframe, where the downlink control channel region is located in the first 1, 2 or 3 symbols of the one subframe; and Or, the length of the first TTI is less than or equal to 0.5 ms. It can be understood that the first DCI is only received on the control region control region, and/or the second DCI is only received on the shorter TTI.

Further, referring to FIG. 12, before step 301, the method further includes:

Step 307: The network device sends second configuration information to the UT, where the second configuration information is used to indicate that the control indication information is not sent to the UT on the first TTI, or is used to indicate that the control is sent to the UT on the first TTI. Instructions.

It should be noted that step 307 is similar to the first configuration information in step 203 of the foregoing embodiment, but the first scheduling mode in step 203 of the foregoing embodiment is used to indicate that the first configuration is received. a DCI, the second scheduling mode is used to indicate that the first DCI and the second DCI are received; and the step 307 is used to indicate that the control indication information is not sent on the first TTI, or is used to indicate that the control indication information is sent on the first TTI. .

Step 308: The UT receives the second configuration information.

It should be noted that the second configuration information in the step 308 is the same as the second configuration information in the foregoing step 307, and details are not described herein again.

Further, in the embodiment of the present invention, when data transmission between the network device and the UT is implemented according to the method described in steps 301-208, the first DCI may further include information for indicating a TTI length.

The information about the length of the TTI may be used to indicate different TTI lengths, as described below.

A TTI length, a TTI length is the length of time of the TTI contained in the time window: or,

At least one TTI length and location information of the TTI included in the time window, where the TTI length has a correspondence relationship with the location information of the TTI included in the time window; or

At least one TTI length, the TTI length is corresponding to the location information of the TTI included in the time window, and the location information of the TTI included in the time window is pre-defined or high-level signaling; and/or

The length of time at which the physical channel is located, the physical channel including at least one of an uplink data channel, a downlink data channel, an uplink control channel, and a downlink control channel.

It should be noted that the TTI length information in the embodiment of the present invention is consistent with the TTI length information (1)-(5) in the foregoing embodiment. For details, refer to the TTI length information (1)-(5) in the foregoing embodiment. The embodiments of the present invention are not described herein again.

Further, when the network device sends the second DCI to the UT in the first TTI included in the time window, the resource element RE occupied by the downlink data channel does not include the RE of the time-frequency resource of the second DCI; when the network device is in the time window In the first TTI that is included, the second DCI is not sent to the UT, and the resource element RE occupied by the downlink data channel includes the RE where the time-frequency resource of the second DCI on the first TTI is located.

Correspondingly, when the UT receives the second DCI on the first TTI included in the time window, it is determined that the resource element RE occupied by the downlink data channel does not include the RE of the time-frequency resource of the second DCI; when the UT is in the time window If the included first TTI does not receive the second DCI or determines, according to the control indication information, that the first TTI included in the time window does not send the second DCI, determining that the resource element RE occupied by the downlink data channel includes, on the first TTI The RE of the second DCI with the time-frequency resource.

It should be noted that, in the embodiment of the present invention, the resource element RE occupied by the downlink data channel and the RE of the time-frequency resource of the second DCI are compared with the time-frequency of the resource element RE and the second DCI occupied by the downlink data channel in the previous embodiment. The REs of the resources are consistent. For details, refer to the description in the previous embodiment, and details are not described herein again.

Further, the first DCI is further used to indicate at least one of the following functions: an RE occupied by the second DCI, a number of candidate downlink control channels corresponding to the second DCI, a CCE aggregation level corresponding to the second DCI, and a second DCI corresponding The number of REs occupied by the CCE, the format of the second DCI. Optionally, the control indication information in this embodiment may also be used to indicate at least one of the following functions: an RE occupied by the second DCI, a number of candidate downlink control channels corresponding to the second DCI, and a CCE corresponding to the second DCI. The aggregation level, the number of REs occupied by the CCE corresponding to the second DCI, and the format of the second DCI are not limited in this embodiment of the present invention. At least one of the following: the RE of the second DCI, the number of candidate downlink control channels corresponding to the second DCI, the CCE aggregation level corresponding to the second DCI, and the RE occupied by the CCE corresponding to the second DCI. The number and the format of the second DCI can reduce the number of blind detections of the second DCI by the UT. It should be noted that, in the embodiment, the RE occupied by the second DCI, the number of candidate downlink control channels corresponding to the second DCI, the CCE aggregation level corresponding to the second DCI, and the number of REs occupied by the CCE corresponding to the second DCI, and the number The format of the second DCI, the number of candidate downlink control channels corresponding to the second DCI occupied by the second DCI in the previous embodiment, the CCE aggregation level corresponding to the second DCI, and the number of REs occupied by the CCE corresponding to the second DCI The format of the second DCI is the same. For details, refer to the description in the previous embodiment, and details are not described herein again.

Further, referring to FIG. 13, the method further includes:

Step 309: The network device sends HARQ feedback resource information to the UT, where the HARQ feedback resource information includes a first HARQ feedback resource and a second HARQ feedback resource.

Step 310: The UT receives HARQ feedback resource information.

Step 311: The UT determines HARQ feedback resource information corresponding to the detection result according to the detection result and the corresponding relationship, and sends the information to the network device.

The mapping relationship includes a mapping relationship between the detection result and the first HARQ feedback resource and the second HARQ feedback resource, where the detection result includes whether the second DCI is detected, and/or whether the received downlink data channel occupies the time-frequency resource of the second DCI. RE.

Step 312: The network device receives the HARQ feedback information, and determines the detection result of the UT according to the HARQ feedback resource information and the corresponding relationship.

It should be noted that the steps 309-312 in this embodiment are consistent with the steps 207-210 in the previous embodiment. For details, refer to the description of the previous embodiment, and details are not described herein again.

Further, in this embodiment and the previous embodiment, the relationship between the first DCI, the first TTI, and the second DCI described in the embodiment is as shown in FIG. 14 in the horizontal direction on the physical resource block PRB. For the time domain resource, it is represented as a symbol in the time domain, that is, TTI. If it is a normal cyclic prefix, it includes 14 symbols. If it is an extended cyclic prefix, it includes 12 symbols. In the vertical direction, it is a frequency domain resource, including 12 sub-bands. Carrier, one subcarrier can be one resource element RE.

As shown in FIG. 15, the control indication information and the second DCI distribution map on one physical resource block PRB, and the PRB includes 14 symbols in the time domain and 12 subcarriers in the frequency domain, and the length of each TTI is For 2 symbols. Wherein, the RE with the label I indicates the control region, that is, the region where the first DCI is located; the RE with the label II indicates the region where the cell reference signal is located; and the RE with the label III indicates the region where the control indication information is located. The RE labeled IV indicates the RE where the second DCI is located; the RE labeled V indicates the data region. Control indication information is sent on each symbol in the figure, that is, the RE of the symbol III is transmitted on each symbol, but not the second DCI exists on each TTI, that is, the second DCI is not transmitted every 2 symbols. Optionally, the second DCI is sent on each TTI, that is, the second DCI is sent every 2 symbols.

As shown in FIG. 16, there is no control indication information on one physical resource block PRB, and only a distribution map of the second DCI is included, and each TTI has a length of 2 symbols. The RE with the label I indicates the control region, that is, the region where the first DCI is located; the RE with the label II indicates the region where the cell reference signal is located; the RE labeled IV indicates the RE where the second DCI is located. The RE labeled V indicates the data area. In the figure, the second is sent on each TTI. The DCI, that is, the second DCI is transmitted every 2 symbols.

A data transmission method is provided by the network device. The network device sends the first downlink control information DCI to the user terminal UT, where the first DCI includes scheduling information for indicating that the UT performs information transmission in the time window, and the time window. Include at least one transmission time interval TTI to configure information transmission on the UT for at least one TTI, after which the network device sends a second DCI to the UT, the second DCI is used to complete at least one of the following functions: triggering the The UT sends information for instructing the UT to receive information for updating at least a part of the information in the scheduling information, so that the scheduling of the UT can be implemented by using the scheduling information in the first DCI and the second DCI, using the second DCI instead of Using all scheduling information or all old scheduling information can improve resource utilization efficiency while reducing control signaling overhead. At the same time, the network device solves the problem of rate matching error by indicating whether the RE occupied by the downlink data channel that is sent includes the RE where the second DCI is located, and also saves transmission resources.

FIG. 17 is a schematic structural diagram of a network device according to an embodiment of the present invention. Referring to FIG. 17, the network device includes:

The sending unit 401 is configured to send, to the user terminal UT, first downlink control information DCI, where the first DCI includes scheduling information for indicating that the UT is within a time window, where the time window includes at least one transmission time interval TTI .

The number of the at least one TTI is N, and the network device sends, to the UT, scheduling information indicating that the UT performs information transmission in a time window formed by the N TTIs, where the network device uses N TTI information. The transmitted scheduling information is sent to the UT at one time without transmitting the scheduling information for each TTI of the N TTIs. Of course, the network device may also perform each of the N TTIs during the information transmission process. The preset information transmission on the TTI is changed. In addition, the time window includes that the at least one TTI may be continuous or discontinuous.

Optionally, the sending unit 401 is further configured to send, to the UT, first configuration information, where the first configuration information is used to configure a first scheduling mode;

The first scheduling mode is used to instruct the UT to receive the first DCI.

Optionally, the sending unit 401 is further configured to send, to the UT, first configuration information, where the first configuration information is used to configure a second scheduling mode;

The second scheduling mode is used to instruct the UT to receive the first DCI and the second DCI, the second DCI is used to perform at least one of the following functions:

Triggering the UT to send information,

Used to instruct the UT to receive information,

And used to update at least a part of the information in the scheduling information.

It should be noted that the first configuration information may be carried on a network device sending control channel, such as in a first DCI, or may be carried on a high layer signaling, such as RRC (Radio Resource Control) signaling. Medium, or it can be pre-defined.

Optionally, after the sending unit 401 sends the first DCI, the sending unit 401 is further configured to send the second DCI to the UT on the first TTI, where the first TTI is in the at least one TTI included in the time window. One of the TTIs.

Optionally, the sending unit 401 is further configured to: when the first configuration information is used to configure the second scheduling mode, send a second DCI to the UT on the first TTI, where the first TTI is the time The window contains one of the at least one TTI.

Optionally, the sending unit 401 is further configured to send control indication information to the UT on the first TTI, where the control indication information is used to indicate whether the second DCI is sent on the first TTI, where the first TTI is Is one of the at least one TTI included in the time window, and the second DCI is used to perform at least one of the following functions:

Triggering the UT to send information,

Used to instruct the UT to receive information,

That is, the second DCI may be used to separately trigger the UT to send information, or separately used to indicate that the UT receives information, or used to update at least one of the scheduling information, or may be used to trigger the UT to be sent at the same time. The information, used to indicate at least one of the UT receiving information and the updated scheduling information, or used to trigger any two of the above.

In another embodiment of the present invention, the sending unit 401 is further configured to: when the control indication information indicates that the second DCI is sent on the first TTI, on a time-frequency resource in the first TTI Transmitting the second DCI to the UT, receiving information sent by the UT according to the first DCI and the second DCI, or sending information to the UT on the first TTI;

The sending unit is further configured to: when the control indication information indicates that the second DCI is not sent on the first TTI, receive information sent by the UT according to the first DCI or Information is sent to the UT on a TTI.

Optionally, the control indication information includes first indication information or second indication information, where

Optionally, the sending unit 401 is further configured to send, to the UT, second configuration information, where the second configuration information is used to indicate that the control indication information is not sent to the UT on the first TTI, or And configured to send the control indication information to the UT on the first TTI.

Optionally, the first DCI further includes information for indicating a length of the TTI.

Optionally, the information about the length of the TTI is used to indicate:

Optionally, when the second DCI is sent to the UT on the first TTI, the resource element RE occupied by the downlink data channel does not include the RE of the time-frequency resource of the second DCI; and/or,

Optionally, the first DCI is further used to indicate at least one of the following functions: an RE occupied by the second DCI, a number of candidate downlink control channels corresponding to the second DCI, and a CCE aggregation level corresponding to the second DCI. The number of REs occupied by the CCE corresponding to the second DCI, and the format of the second DCI.

Optionally, the scheduling information includes information used to trigger the UT to send an initial transmission or information used to instruct the UT to receive an initial transmission; and/or,

The second DCI is used to trigger the UT to send information or to instruct the UT to receive a message. The information includes: the second DCI is used to trigger the UT to send retransmission information or to indicate that the UT receives retransmission information.

Optionally, the sending unit 401 is configured to send the first DCI to the UT, including: sending the first DCI to the UT in a downlink control channel region in one subframe, where the downlink control channel region is located The first 1, 2 or 3 symbols of a sub-frame; and/or,

The length of the first TTI is less than or equal to 0.5 ms.

Optionally, referring to FIG. 18, the network device further includes:

The receiving unit 402 is configured to receive first notification information that is sent by the UT, where the first notification information is used to indicate that the UT has the capability of receiving the second DCI or is used to indicate that the UT has the capability of receiving the first configuration information.

Optionally, referring to FIG. 19, the network device further includes:

The processing unit 403 is configured to generate the first DCI according to scheduling information of the UT in a time window.

Optionally, the processing unit 403 is further configured to generate the second DCI.

A network device is provided by the network device, where the network device sends the first downlink control information DCI to the user terminal UT, where the first DCI includes scheduling information for indicating that the UT performs information transmission in a time window, and the time window Include at least one transmission time interval TTI, so as to configure information transmission on the UT for at least one TTI, so that when the user terminal receives the first DCI, the user terminal may perform information transmission according to the scheduling information included in the first DCI, thereby The network device does not need to send scheduling information once per TTI, which saves transmission resources, and also reduces downlink throughput and increases the rate of data transmission.

FIG. 20 is a schematic structural diagram of a user terminal according to an embodiment of the present invention. Referring to FIG. 20, the user terminal includes:

The receiving unit 501 is configured to receive first downlink control information DCI, where the first DCI includes scheduling information for indicating information transmission in a time window, where the time window includes at least one transmission time interval TTI.

Optionally, the receiving unit 501 is further configured to receive first configuration information, where the first configuration information is used to configure a first scheduling mode;

The first scheduling mode is used to indicate that the first DCI is received.

Optionally, the receiving unit 501 is further configured to receive first configuration information, where the first configuration information is Information is used to configure the second scheduling mode;

The second scheduling mode is used to instruct the UT to receive the first DCI and the second DCI, and the second DCI is used to complete at least one of the following functions:

Triggering the UT to send information,

Used to instruct the UT to receive information,

Optionally, after the receiving unit 501 receives the first DCI, the receiving unit 501 is further configured to receive the second DCI on the first TTI, where the first TTI is in the at least one TTI included in the time window. A TTI.

Optionally, the receiving unit 501 is further configured to: when the configuration information is used to configure the second scheduling mode, receive the second DCI on the first TTI, where the first TTI is at least the time window includes A TTI in a TTI.

In another embodiment of the present invention, the receiving unit 501 is further configured to receive control indication information on the first TTI, where the control indication information is used to indicate whether the second DCI is sent on the first TTI, where the A TTI is one of at least one TTI included in the time window, and the second DCI is used to perform at least one of the following functions:

Triggering the UT to send information,

Used to instruct the UT to receive information,

Optionally, the receiving unit 501 is further configured to: when the control indication information indicates that the second DCI is sent on the first TTI, receive the second DCI on the first TTI, according to the a DCI and the second DCI, transmitting information or receiving information on the first TTI;

The receiving unit 501 is further configured to: when the control indication information indicates that the second DCI is not sent on the first TTI, send information according to the first DCI, or receive information on the first TTI. .

Optionally, the receiving unit 501 is further configured to receive second configuration information, where the second configuration information is used to indicate that the control indication information is not sent on the first TTI, or is used to indicate that The control indication information is sent on the first TTI.

Optionally, the information about the length of the TTI is used to indicate:

At least one TTI length and TTI location information of the TTI included in the time window, the TTI length corresponding to the location information of the TTI included in the time window; and/or

Optionally, when the second DCI is received on the first TTI, the resource element RE occupied by the downlink data channel does not include the RE of the time-frequency resource of the second DCI; and/or,

When the second DCI is not received on the first TTI, the resource element RE occupied by the downlink data channel includes an RE where the time-frequency resource of the second DCI on the first TTI is located;

Optionally, the scheduling information includes information used to trigger the sending of the initial transmission or information used to indicate the initial transmission; and/or,

The second DCI is used to trigger sending information or to indicate receiving information, and includes: the second DCI is used to trigger information for sending retransmission or information for indicating retransmission.

Optionally, the receiving unit 401 is configured to receive the first DCI, where the first DCI is received in a downlink control channel region of a subframe, where the downlink control channel region is located in the first 1, 2 or 3 symbols; and/or,

The length of the first TTI is less than or equal to 0.5 ms.

Optionally, referring to FIG. 21, the user terminal further includes:

The sending unit 502 is configured to send first notification information, where the first notification information is used to indicate that The ability to receive the second DCI, either to indicate the ability to receive the first configuration information, or to indicate the ability to receive the second configuration information.

The user terminal provided by the embodiment of the present invention receives the first downlink control information DCI sent by the network device, where the first DCI includes scheduling information for indicating that the UT performs information transmission in a time window, and the time window includes at least a transmission time interval TTI, thereby configuring information transmission on the UT for at least one TTI, and performing information transmission according to the scheduling information included in the first DCI, so that the network device does not need to send scheduling information once in each TTI, thereby saving transmission resources. At the same time, it also reduces the downlink throughput and increases the rate of data transmission.

FIG. 22 is a schematic structural diagram of a network device, where the network device includes: a processor 61, a memory 62, and a communication interface 63.

It will be understood by those skilled in the art that the structure shown in FIG. 22 is merely illustrative, and does not limit the structure of the network device. For example, the network device may also include more or fewer components than shown in FIG. 22, or have a different configuration than that shown in FIG.

The following describes the components of the network device:

The memory 62 is configured to store computer execution instructions, the processor 61 is coupled to the memory 62, and when the network device is running, the processor 61 executes the computer execution instructions stored by the memory 62 to Having the network device perform the steps of the network device in the method shown in any of the above Figures 5-13. For a specific method, refer to the related description in the embodiment shown in any one of FIG. 5 to FIG. 13 , and details are not described herein again.

The embodiment further provides a storage medium, which may include the memory 62.

The processor 61 can be a CPU. The processor 61 can also be other general purpose processors, DSPs, ASICs, FPGAs or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and the like. The general purpose processor may be a microprocessor or the processor or any conventional processor or the like.

The processor 61 may be a dedicated processor, and the dedicated processor may include at least one of a baseband processing chip, a radio frequency processing chip, and the like. Further, the dedicated processor may also include a chip having other dedicated processing functions of the network device.

The memory 62 can include volatile memory, such as random access memory RAM; the memory 62 can also include non-volatile memory, such as read only memory ROM, flash memory, HDD or SSD; A group of memories of the above kind may be included Hehe.

The communication interface 63 may specifically be a transceiver on a network device. The transceiver can be a wireless transceiver. For example, the wireless transceiver can be an antenna of a network device or the like. The processor 61 performs data transmission and reception with the other device, for example, the terminal through the communication interface 63.

In a specific implementation process, each step of the network device in the method flow shown in any one of the foregoing FIG. 5 to FIG. 13 can be implemented by the processor 61 in the hardware form executing the computer executed instructions in the form of software stored in the memory 62. To avoid repetition, we will not repeat them here.

FIG. 23 is a user terminal, where the user terminal includes: a processor 71, a memory 72, and a communication interface 73.

It will be understood by those skilled in the art that the structure shown in FIG. 23 is merely illustrative, and does not limit the structure of the user terminal. For example, the user terminal may also include more or less components than those shown in FIG. 23, or have a different configuration than that shown in FIG.

The following describes the components of the user terminal in detail:

The memory 72 is configured to store computer execution instructions, the processor 71 is coupled to the memory 72, and when the user terminal is running, the processor 71 executes the computer execution instructions stored by the memory 72 to The user terminal is caused to perform the steps of the user terminal in the method flow shown in any of the above-mentioned FIGS. 5-13. For a specific method, refer to the related description in the embodiment shown in any one of FIG. 5 to FIG. 13 , and details are not described herein again.

The embodiment further provides a storage medium, which may include the memory 72.

The processor 71 can be a central processing unit (English: central processing unit, abbreviation: CPU). The processor 71 can also be other general-purpose processors, digital signal processing (DSP), application specific integrated circuit (ASIC), field programmable gate array (English) : Field-programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general purpose processor may be a microprocessor or the processor or any conventional processor or the like.

The processor 71 may be a dedicated processor, and the dedicated processor may include at least one of a baseband processing chip, a radio frequency processing chip, and the like. Further, the dedicated processor may also include a chip having other dedicated processing functions of the user terminal.

The memory 72 may include a volatile memory (English: volatile memory) (English: random-access memory, abbreviation: RAM); the memory 72 may also include a non-volatile memory (English: Non-volatile memory, such as read-only memory (English: read-only memory, abbreviation: ROM), flash memory (English: flash memory), hard disk (English: hard disk drive, abbreviation: HDD) or solid state drive (English) : solid-state drive, abbreviated: SSD); the memory 72 may also include a combination of the above types of memory.

The communication interface 73 may specifically be a transceiver on the user terminal. The transceiver can be a wireless transceiver. For example, the wireless transceiver can be an antenna of a user terminal or the like. The processor 71 performs data transmission and reception with other devices, such as a base station, through the communication interface 73.

In a specific implementation process, each step of the user terminal in the method flow shown in any one of the foregoing FIG. 5 to FIG. 13 can be implemented by the processor 71 in hardware form executing the computer-executed instruction in the form of software stored in the memory 72. To avoid repetition, we will not repeat them here.

The embodiment of the present invention provides a communication system, which includes the network device described above with reference to FIG. 22 and the user terminal described above with reference to FIG.

The communication system provided by the embodiment of the present invention, the network device in the communication system sends the first downlink control information DCI to the user terminal, where the first DCI includes scheduling information for indicating that the UT performs information transmission in the time window, time The window contains at least one transmission time interval TTI, from And configuring, by the UT, the information transmission on the at least one TTI, when receiving the first DCI, the user terminal may perform information transmission according to the scheduling information included in the first DCI, so that the network device does not need to send the scheduling information once in each TTI. , which saves transmission resources, and also reduces downlink throughput and increases the rate of data transmission.

It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not limited thereto; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that The technical solutions described in the foregoing embodiments are modified, or the equivalents of the technical features are replaced. The modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

A data transmission method is characterized in that it is applied to a network device, and the method includes:

Transmitting, by the user terminal UT, first downlink control information DCI, the first DCI including scheduling information indicating that the UT is within a time window, the time window including at least one transmission time interval TTI.
The method of claim 1 further comprising:

Sending, to the UT, first configuration information, where the first configuration information is used to configure a first scheduling mode;

The first scheduling mode is used to instruct the UT to receive the first DCI.
The method of claim 1 further comprising:

Sending, to the UT, first configuration information, where the first configuration information is used to configure a second scheduling mode;

The second scheduling mode is used to instruct the UT to receive the first DCI and the second DCI, and the second DCI is used to complete at least one of the following functions:

Triggering the UT to send information,

Used to instruct the UT to receive information,

And used to update at least a part of the information in the scheduling information.
The method according to claim 1, wherein after the sending the first downlink control information DCI to the user terminal UT, the method further includes:

Transmitting, to the UT, a second DCI on the first TTI, the first TTI being one of at least one TTI included in the time window.
The method of claim 3, further comprising:

When the first configuration information is used to configure the second scheduling mode, send a second DCI to the UT on the first TTI, where the first TTI is one TTI of the at least one TTI included in the time window.
The method of claim 1 further comprising:

Sending control indication information to the UT on the first TTI, where the control indication information is used to indicate whether the second DCI is sent on the first TTI, where the first TTI is in at least one TTI included in the time window. One TTI, the second DCI is used to perform at least one of the following functions:

Triggering the UT to send information,

Used to instruct the UT to receive information,

And used to update at least a part of the information in the scheduling information.
The method according to claim 6, wherein after the sending the control indication information to the UT on the first TTI, the method further includes:

When the control indication information indicates that the second DCI is sent on the first TTI, sending the second DCI to the UT on a time-frequency resource in the first TTI, according to the first DCI And receiving, by the second DCI, information sent by the UT or sending information to the UT on the first TTI;

When the control indication information indicates that the second DCI is not sent on the first TTI, receiving information sent by the UT or sending information to the UT on the first TTI according to the first DCI .
The method according to claim 6 or 7, wherein the control indication information comprises first indication information or second indication information, where

The first indication information is used to indicate that the second DCI is not sent on the first TTI;

The second indication information is used to indicate that the second DCI is sent on the first TTI.
The method of any of claims 6-8, further comprising:

Transmitting, to the UT, second configuration information, where the second configuration information is used to indicate that the control indication information is not sent to the UT on the first TTI, or is used to indicate that the first TTI is The UT sends the control indication information.
The method of any of claims 1-9, wherein the first DCI further comprises information for indicating a length of the TTI.
The method according to claim 10, wherein the information of the TTI length is used to indicate:

A TTI length, the length of the TTI being the length of time of the TTI included in the time window; or

At least two candidate TTI lengths, wherein a time length of any one of the TTIs included in the time window is one of the at least two candidate TTI lengths; or

At least one TTI length and location information of the TTI included in the time window, the TTI length corresponding to the location information of the TTI included in the time window; and/or

The time length of the at least one physical channel, where the physical channel includes at least one of an uplink data channel, a downlink data channel, an uplink control channel, and a downlink control channel.
The method of any of claims 3-11, further comprising:

When the second DCI is sent to the UT on the first TTI, the resource element RE occupied by the downlink data channel does not include the RE of the time-frequency resource of the second DCI; and/or,

When the second DCI is not sent to the UT in the first TTI, the resource element RE occupied by the downlink data channel includes the RE where the time-frequency resource of the second DCI on the first TTI is located;

The first TTI is one TTI in the at least one TTI included in the time window, and the downlink data channel is used to carry data information sent to the UT on the first TTI.
The method according to any one of claims 3 to 12, wherein the first DCI is further used to indicate at least one of the following functions:

The RE occupied by the second DCI,

The number of candidate downlink control channels corresponding to the second DCI,

The CCE aggregation level corresponding to the second DCI,

The number of REs occupied by the CCE corresponding to the second DCI,

The format of the second DCI.
The method according to any one of claims 3 to 13, wherein the scheduling information comprises information for triggering the UT to transmit an initial transmission or for instructing the UT to receive an initial transmission; and/or ,

The second DCI is used to trigger the UT to send information or to indicate that the UT receives information, including: the second DCI is used to trigger the UT to send retransmission information or to indicate that the UT receives heavy information. Information passed.
A method according to any one of claims 3-14, wherein

The sending, by the UT, the first DCI, is: sending, by using a downlink control channel region in a subframe, the first DCI, where the downlink control channel region is located before the first, second, or third of the one subframe. Symbols; and/or,

The length of the first TTI is less than or equal to 0.5 ms.
The method according to any one of claims 1 to 15, wherein before the sending the first DCI to the UT, the method further comprises:

Receiving first notification information sent by the UT, where the first notification information is used to indicate that the UT has the capability of receiving the second DCI or is used to indicate that the UT has the capability of receiving the first configuration information.
The method according to any one of claims 1 to 16, wherein before the sending the first downlink control information DCI to the user terminal UT, the method further includes:

Generating the first DCI according to scheduling information of the UT within a time window.
The method according to any one of claims 4 to 17, wherein before the sending the second DCI to the UT on the first TTI, the method further includes:

Generating the second DCI.
A data transmission method is applied to a user terminal UT, and the method includes:

Receiving first downlink control information DCI, the first DCI includes scheduling information for indicating information transmission within a time window, the time window including at least one transmission time interval TTI.
The method of claim 19, further comprising:

Receiving first configuration information, where the first configuration information is used to configure a first scheduling mode;

The first scheduling mode is used to indicate that the first DCI is received.
The method of claim 19, further comprising:

Receiving first configuration information, where the first configuration information is used to configure a second scheduling mode;

The second scheduling mode is used to instruct the UT to receive the first DCI and the second DCI, and the second DCI is used to complete at least one of the following functions:

Triggering the UT to send information,

Used to instruct the UT to receive information,

And used to update at least a part of the information in the scheduling information.
The method according to claim 19, after the receiving the first downlink control information DCI, further comprising:

Receiving the second DCI on a first TTI, the first TTI being one of at least one TTI included in the time window.
The method according to claim 21, after the receiving the first downlink control information DCI, further comprising:

Receiving the first TTI when the configuration information is used to configure a second scheduling mode The second DCI is the one TTI of the at least one TTI included in the time window.
The method of claim 19, further comprising:

Receiving control indication information on the first TTI, where the control indication information is used to indicate whether the second DCI is sent on the first TTI, where the first TTI is one TTI in the at least one TTI included in the time window, The second DCI is used to perform at least one of the following functions:

Triggering the UT to send information,

Used to instruct the UT to receive information,

And used to update at least a part of the information in the scheduling information.
The method according to claim 24, wherein after receiving the control indication information on the first TTI, the method further includes:

When the control indication information indicates that the second DCI is sent on the first TTI, the second DCI is received on the first TTI, and information is sent according to the first DCI and the second DCI. Or receiving information on the first TTI;

And when the control indication information indicates that the second DCI is not sent on the first TTI, sending information according to the first DCI or receiving information on the first TTI.
The method according to claim 24 or 25, wherein the control indication information comprises first indication information or second indication information, wherein

The first indication information is used to indicate that the second DCI is not sent on the first TTI;

The second indication information is used to indicate that the second DCI is sent on the first TTI.
The method of any of claims 24-26, further comprising:

And receiving the second configuration information, where the second configuration information is used to indicate that the control indication information is not sent on the first TTI, or is used to indicate that the control indication information is sent on the first TTI.
The method according to any one of claims 19-27, wherein the first DCI further comprises information for indicating a length of the TTI.
The method of claim 28 wherein said TTI length information is used to indicate:

A TTI length, the length of the TTI being the length of time of the TTI included in the time window; or

At least two candidate TTI lengths, wherein the time window contains any one of the TTI The length of time is one of the at least two candidate TTI lengths; or,

At least one TTI length and TTI location information of the TTI included in the time window, the TTI length corresponding to the location information of the TTI included in the time window; and/or

The time length of the at least one physical channel, where the physical channel includes at least one of an uplink data channel, a downlink data channel, an uplink control channel, and a downlink control channel.
The method of any of claims 21-29, further comprising:

When receiving the second DCI on the first TTI, the resource element RE occupied by the downlink data channel does not include the RE of the time-frequency resource of the second DCI; and/or,

When the second DCI is not received on the first TTI, the resource element RE occupied by the downlink data channel includes an RE where the time-frequency resource of the second DCI on the first TTI is located;

The first TTI is one TTI in the at least one TTI included in the time window, and the downlink data channel is used to carry data information received on the first TTI.
The method according to any one of claims 21 to 30, wherein the first DCI is further used to indicate at least one of the following functions:

The RE occupied by the second DCI,

The number of candidate downlink control channels corresponding to the second DCI,

The CCE aggregation level corresponding to the second DCI,

The number of REs occupied by the CCE corresponding to the second DCI,

The format of the second DCI.
A method according to any one of claims 20 to 31, wherein

The scheduling information includes information for triggering transmission of an initial transmission or information for indicating reception of an initial transmission; and/or,

The second DCI is used to trigger sending information or to indicate receiving information, and includes: the second DCI is used to trigger information for sending retransmission or information for indicating retransmission.
A method according to any of claims 21-32, characterized in that:

The receiving, by the first DCI, the first DCI is received in a downlink control channel region of a subframe, where the downlink control channel region is located in the first 1, 2 or 3 symbols of the subframe; and/or

The length of the first TTI is less than or equal to 0.5 ms.
Method according to any of claims 19-33, characterized in that Before a DCI, it also includes:

Transmitting the first notification information, the first notification information is used to indicate the capability of receiving the second DCI, or to indicate the capability to receive the first configuration information, or to indicate the capability to receive the second configuration information.
A network device, where the network device includes:

And a sending unit, configured to send, to the user terminal UT, first downlink control information DCI, where the first DCI includes scheduling information for indicating that the UT is within a time window, where the time window includes at least one transmission time interval TTI.
A network device according to claim 35, wherein

The sending unit is further configured to send first configuration information to the UT, where the first configuration information is used to configure a first scheduling mode;

The first scheduling mode is used to instruct the UT to receive the first DCI.
A network device according to claim 35, wherein

The sending unit is further configured to send first configuration information to the UT, where the first configuration information is used to configure a second scheduling mode;

The second scheduling mode is used to instruct the UT to receive the first DCI and the second DCI, and the second DCI is used to complete at least one of the following functions:

Triggering the UT to send information,

Used to instruct the UT to receive information,

And used to update at least a part of the information in the scheduling information.
A network device according to claim 35, wherein

The sending unit is further configured to send a second DCI to the UT on the first TTI, where the first TTI is one TTI in the at least one TTI included in the time window.
A network device according to claim 37, wherein

The sending unit is further configured to: when the first configuration information is used to configure the second scheduling mode, send a second DCI to the UT on the first TTI, where the first TTI is included in the time window One TTI in at least one TTI.
A network device according to claim 35, wherein

The sending unit is further configured to send control indication information to the UT on the first TTI, where the control indication information is used to indicate whether the second DCI is sent on the first TTI, where the first The TTI is one of at least one TTI included in the time window, and the second DCI is used to perform at least one of the following functions:

Triggering the UT to send information,

Used to instruct the UT to receive information,

And used to update at least a part of the information in the scheduling information.
A network device according to claim 40, wherein

The sending unit is further configured to: when the control indication information indicates that the second DCI is sent on the first TTI, send the second to the UT on a time-frequency resource in the first TTI And receiving, by the DCI, information sent by the UT or sending information to the UT on the first TTI according to the first DCI and the second DCI;

The sending unit is further configured to: when the control indication information indicates that the second DCI is not sent on the first TTI, receive information sent by the UT according to the first DCI or in the first Information is sent to the UT on the TTI.
The network device according to claim 40 or 41, wherein the control indication information comprises first indication information or second indication information, where

The first indication information is used to indicate that the second DCI is not sent on the first TTI;

The second indication information is used to indicate that the second DCI is sent on the first TTI.
A network device according to any of claims 40-42, characterized in that

The sending unit is further configured to send, to the UT, second configuration information, where the second configuration information is used to indicate that the control indication information is not sent to the UT on the first TTI, or is used to indicate Sending the control indication information to the UT on the first TTI.
The network device according to any one of claims 35-43, wherein the first DCI further comprises information for indicating a length of the TTI.
The network device according to claim 44, wherein the information of the TTI length is used to indicate:

A TTI length, the length of the TTI being the length of time of the TTI included in the time window; or

At least two candidate TTI lengths, wherein a time length of any one of the TTIs included in the time window is one of the at least two candidate TTI lengths; or

At least one TTI length and location information of the TTI included in the time window, the TTI is long Degree corresponds to the location information of the TTI included in the time window; and/or,

The time length of the at least one physical channel, where the physical channel includes at least one of an uplink data channel, a downlink data channel, an uplink control channel, and a downlink control channel.
A network device according to any of claims 37-45, characterized in that

When the second DCI is sent to the UT on the first TTI, the resource element RE occupied by the downlink data channel does not include the RE of the time-frequency resource of the second DCI; and/or,

When the second DCI is not sent to the UT in the first TTI, the resource element RE occupied by the downlink data channel includes the RE where the time-frequency resource of the second DCI on the first TTI is located;

The first TTI is one TTI in the at least one TTI included in the time window, and the downlink data channel is used to carry data information sent to the UT on the first TTI.
The network device according to any one of claims 37 to 46, wherein the first DCI is further used to indicate at least one of the following functions:

The RE occupied by the second DCI,

The number of candidate downlink control channels corresponding to the second DCI,

The CCE aggregation level corresponding to the second DCI,

The number of REs occupied by the CCE corresponding to the second DCI,

The format of the second DCI.
The network device according to any one of claims 37 to 47, wherein the scheduling information comprises information for triggering the UT to transmit an initial transmission or for instructing the UT to receive an initial transmission; and/ or,

The second DCI is used to trigger the UT to send information or to indicate that the UT receives information, including: the second DCI is used to trigger the UT to send retransmission information or to indicate that the UT receives heavy information. Information passed.
A network device according to any one of claims 37-48, characterized in that:

The sending unit, configured to send the first DCI to the UT, includes: sending the first DCI to the UT in a downlink control channel region in one subframe, where the downlink control channel region is located in the one subframe The first 1, 2 or 3 symbols; and / or,

The length of the first TTI is less than or equal to 0.5 ms.
A network device according to claims 35-49, wherein said network is Also included are:

The receiving unit is configured to receive first notification information that is sent by the UT, where the first notification information is used to indicate that the UT has the capability of receiving the second DCI or is used to indicate that the UT has the capability of receiving the first configuration information.
The network device according to any one of claims 35 to 50, wherein the network device further comprises:

And a processing unit, configured to generate the first DCI according to scheduling information of the UT in a time window.
A network device according to any of claims 38-51, characterized in that

The processing unit is further configured to generate the second DCI.
A user terminal, the user terminal comprising:

And a receiving unit, configured to receive first downlink control information DCI, where the first DCI includes scheduling information for indicating information transmission within a time window, where the time window includes at least one transmission time interval TTI.
A user terminal according to claim 53, wherein

The receiving unit is further configured to receive first configuration information, where the first configuration information is used to configure a first scheduling mode;

The first scheduling mode is used to indicate that the first DCI is received.
A user terminal according to claim 53, wherein

The receiving unit is further configured to receive first configuration information, where the first configuration information is used to configure a second scheduling mode;

The second scheduling mode is used to instruct the UT to receive the first DCI and the second DCI, and the second DCI is used to complete at least one of the following functions:

Triggering the UT to send information,

Used to instruct the UT to receive information,

And used to update at least a part of the information in the scheduling information.
A user terminal according to claim 53, wherein

The receiving unit is further configured to receive the second DCI on a first TTI, where the first TTI is one of at least one TTI included in the time window.
A user terminal according to claim 55, characterized in that

The receiving unit is further configured to: when the configuration information is used to configure a second scheduling mode, receive the second DCI on a first TTI, where the first TTI is in at least one TTI included in the time window. One of the TTIs.
A user terminal according to claim 53, wherein

The receiving unit is further configured to receive control indication information on the first TTI, where the control indication information is used to indicate whether the second DCI is sent on the first TTI, where the first TTI is included in the time window. One TTI in at least one TTI, the second DCI being used to perform at least one of the following functions:

Triggering the UT to send information,

Used to instruct the UT to receive information,

And used to update at least a part of the information in the scheduling information.
A user terminal according to claim 58, wherein

The receiving unit is further configured to: when the control indication information indicates that the second DCI is sent on the first TTI, receive the second DCI on the first TTI, according to the first DCI and Transmitting information or receiving information on the first TTI;

The receiving unit is further configured to: when the control indication information indicates that the second DCI is not sent on the first TTI, send information according to the first DCI or receive information on the first TTI.
The user terminal according to claim 58 or 59, wherein the control indication information comprises first indication information or second indication information, wherein

The first indication information is used to indicate that the second DCI is not sent on the first TTI;

The second indication information is used to indicate that the second DCI is sent on the first TTI.
A user terminal according to any one of claims 58 to 59, characterized in that

The receiving unit is further configured to receive the second configuration information, where the second configuration information is used to indicate that the control indication information is not sent on the first TTI, or is used to indicate that the first TTI is sent. The control indication information.
The user terminal according to any one of claims 53-61, wherein the first DCI further comprises information for indicating a length of the TTI.
The user terminal according to claim 62, wherein the information of the TTI length is used to indicate:

A TTI length, the length of the TTI being the length of time of the TTI included in the time window; or

At least two candidate TTI lengths, wherein a time length of any one of the TTIs included in the time window is one of the at least two candidate TTI lengths; or

At least one TTI length and TTI location information of the TTI included in the time window, the TTI length corresponding to the location information of the TTI included in the time window; and/or

The time length of the at least one physical channel, where the physical channel includes at least one of an uplink data channel, a downlink data channel, an uplink control channel, and a downlink control channel.
The user terminal according to any one of claims 55-63, further comprising:

When receiving the second DCI on the first TTI, the resource element RE occupied by the downlink data channel does not include the RE of the time-frequency resource of the second DCI; and/or,

When the second DCI is not received on the first TTI, the resource element RE occupied by the downlink data channel includes an RE where the time-frequency resource of the second DCI on the first TTI is located;

The first TTI is one TTI in the at least one TTI included in the time window, and the downlink data channel is used to carry data information received on the first TTI.
The user terminal according to any one of claims 55-64, wherein the first DCI is further used to indicate at least one of the following functions:

The RE occupied by the second DCI,

The number of candidate downlink control channels corresponding to the second DCI,

The CCE aggregation level corresponding to the second DCI,

The number of REs occupied by the CCE corresponding to the second DCI,

The format of the second DCI.
A user terminal according to any of claims 54-65, characterized in that

The scheduling information includes information for triggering transmission of an initial transmission or information for indicating reception of an initial transmission; and/or,

The second DCI is used to trigger sending information or to indicate receiving information, and includes: the second DCI is used to trigger information for sending retransmission or information for indicating retransmission.
A user terminal according to any of claims 55-66, characterized in that:

The receiving unit is configured to receive the first DCI, including: a downlink control signal in one subframe The track area receives the first DCI, and the downlink control channel area is located in the first 1, 2 or 3 symbols of the subframe; and/or,

The length of the first TTI is less than or equal to 0.5 ms.
The user terminal according to any one of claims 53 to 67, wherein the user terminal further comprises:

a sending unit, configured to send first notification information, where the first notification information is used to indicate that the device has the capability of receiving the second DCI, or is used to indicate that the device has the capability of receiving the first configuration information, or is configured to indicate that the second configuration information is received. ability.
A network device, comprising: a processor and a memory, the memory storing code and data, the processor being operative to execute code in a memory, the processor for performing the above claim 1 The data transmission method of any of 18.
A user terminal, comprising: a processor and a memory, said memory storing code and data, said processor being operative to execute code in said memory, said processor for performing said claim 19 - The data transmission method of any of 34.