WO2017015855A1 - Data communication method and apparatus - Google Patents

Data communication method and apparatus Download PDF

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Publication number
WO2017015855A1
WO2017015855A1 PCT/CN2015/085309 CN2015085309W WO2017015855A1 WO 2017015855 A1 WO2017015855 A1 WO 2017015855A1 CN 2015085309 W CN2015085309 W CN 2015085309W WO 2017015855 A1 WO2017015855 A1 WO 2017015855A1
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WO
WIPO (PCT)
Prior art keywords
time parameter
network entity
tti
tti time
scheduling command
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PCT/CN2015/085309
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French (fr)
Chinese (zh)
Inventor
权威
张戬
苗金华
李秉肇
唐珣
杨晓东
Original Assignee
华为技术有限公司
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Priority to PCT/CN2015/085309 priority Critical patent/WO2017015855A1/en
Publication of WO2017015855A1 publication Critical patent/WO2017015855A1/en

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management, e.g. wireless traffic scheduling or selection or allocation of wireless resources
    • H04W72/04Wireless resource allocation

Abstract

A data communication method and apparatus. The method comprises: a network entity determines a TTI configuration parameter, the TTI configuration parameter indicating TTI time parameters, the number of the TTI time parameters indicated by the TTI configuration parameter being greater than or equal to 2, and time intervals indicated by different TTI time parameters being different; the network entity determines a TTI time parameter among the TTI time parameters as a target TTI time parameter; and the network entity sends or receives data by using the target TTI time parameter. In the solution, a TTI time parameter among TTI time parameters is determined as a target TTI time parameter, the number of the TTI time parameters is greater than or equal to 2, and a network entity sends or receives data by using the target TTI time parameter. In this manner, TTI time parameters used when data is sent or received are not fixed and are changed as application scenarios change, and accordingly the problems of serious waste of resources and great overheads of physical control channels due to poor flexibility are resolved.

Description

Method and device for data communication Technical field

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

Background technique

With the development of communication technology, the total number of devices connected to the global mobile communication network will reach 100 billion. It is estimated that by 2020, the number of global mobile terminals (excluding IoT devices) will exceed 10 billion, of which China will exceed 2 billion. As the number of terminals increases, reducing the transmission delay during data transmission becomes an urgent problem to be solved. .

At present, the TTI (Transmission Time Interval) used by the terminal in transmitting data is fixed to 1 ms. In order to reduce the transmission delay, the short TTI technology is applied. The short TTI technology actually sets the length of the TTI to less than 1 ms. In this technology, the TTI used in the data transmission process is still fixed.

In actual applications, when different channel environments or different QoS (Quality of Service) requirements are required, the length of the TTI used for transmitting data is also different. However, in the prior art, regardless of the TTI length of 1 ms, 0.5 ms. The length of the TTI used in the data transmission process is fixed, and there are defects of poor flexibility, which leads to serious waste of resources and large physical control channel overhead.

For example, when the TTI length is 1 ms, only 0.5 physical resource blocks are needed for the data to be transmitted, but if the TTI length is 1 ms, then one physical resource block is used to transmit the data, resulting in 0.5 physical. Resource blocks are wasted.

For example, when the length of the TTI is 0.5 ms, if the data to be transmitted is big data, the data is transmitted by using a TTI of 0.5 ms, and there is a defect that the physical control channel has a large overhead.

In summary, the length of the TTI used in the current communication process does not change with the application scenario, and there are defects such as serious waste of resources due to poor flexibility and large physical control channel overhead.

Summary of the invention

The embodiment of the invention provides a method and a device for data communication, which are used to solve the defects that the current resource loss is serious due to poor flexibility and the physical control channel overhead is large.

In a first aspect, a network entity is provided, including:

a determining unit, configured to determine a transmission time interval TTI configuration parameter, where the TTI configuration parameter indicates a TTI time parameter, where the number of TTI time parameters indicated by the TTI configuration parameter is greater than or equal to 2, and the time indicated by different TTI time parameters Different intervals;

The determining unit is further configured to: determine a TTI time parameter from the TTI time parameter as a target TTI time parameter;

And a communication unit, configured to send or receive data by using the target TTI time parameter.

With reference to the first aspect, in a first possible implementation, the network entity is a base station or a user equipment UE.

With reference to the first aspect, or the first possible implementation manner of the first aspect, in the second possible implementation manner, when the network entity is a UE, when the determining unit determines the TTI configuration parameter, specifically:

Receiving the TTI configuration parameter sent by the network side device.

With reference to the first aspect, or the first to second possible implementation manners of the first aspect, in a third possible implementation manner, the TTI time parameter is in milliseconds ms, or is divided by an orthogonal frequency. The unit of time occupied by the OFDM symbol, or the number of OFDM symbols.

With reference to the first aspect, or the first to third possible implementation manners of the first aspect, in a fourth possible implementation, the determining unit determines a TTI time parameter from the TTI time parameter as a target TTI When the time parameter is specified as:

Determining a first mapping rule and a first scheduling command, where the first mapping rule includes a correspondence between the scheduling identifier and the TTI time parameter; determining the target TTI time according to the first scheduling command and the first mapping relationship parameter.

In conjunction with the fourth possible implementation of the first aspect, in a fifth possible implementation manner, When the determining unit determines the target TTI time parameter according to the first scheduling command and the first mapping relationship, specifically:

Using the scheduling identifier included in the first mapping rule to traverse the first scheduling command; and successfully descrambling the TTI time parameter corresponding to the scheduling identifier of the first scheduling command as the target TTI time parameter .

With reference to the first aspect, or the first to third possible implementation manners of the first aspect, in a sixth possible implementation, the determining unit determines a TTI time parameter from the TTI time parameter as a target TTI When the time parameter is specified as:

Determining a first scheduling command that carries a TTI time parameter, and using the TTI time parameter carried by the first scheduling command as the target TTI time parameter.

With reference to the first aspect, or the first to third possible implementation manners of the first aspect, in a seventh possible implementation, the determining unit determines a TTI time parameter from the TTI time parameter as a target TTI When the time parameter is specified as:

Determining a first scheduling command that carries a bit identifier corresponding to the TTI time parameter; and using a TTI time parameter corresponding to the bit identifier as the target TTI time parameter.

With reference to the fourth to seventh possible implementation manners of the first aspect, in an eighth possible implementation manner, the first scheduling command indicates a first physical transmission resource;

When the communication unit sends or receives data by using the target TTI time parameter, specifically:

Determining, according to the first scheduling command, a first physical transmission resource; transmitting or receiving the data by using the target TTI time parameter and the first physical transmission resource.

With reference to the first aspect, or the first to the eighth possible implementation manners of the first aspect, in the ninth possible implementation manner, when the communications unit sends or receives data by using the target TTI time parameter, specifically :

The data is transmitted or received using at least two of the target TTI time parameters.

With reference to the first aspect, or the first to ninth possible implementation manners of the first aspect, in the tenth possible implementation manner, the communication unit is further configured to:

Send or receive hybrid automatic repeat request HARQ feedback information.

With reference to the tenth possible implementation of the first aspect, in an eleventh possible implementation manner, the determining unit is further configured to:

Determining a second mapping rule, where the second mapping rule includes a correspondence between a TTI time parameter and a HARQ feedback TTI time parameter; and determining a HARQ feedback TTI time parameter corresponding to the target TTI time parameter according to the second mapping rule.

With reference to the eleventh possible implementation manner of the first aspect, in the twelfth possible implementation, when the communications unit sends or receives the HARQ feedback information, specifically:

The HARQ feedback information is transmitted or received by using the determined HARQ feedback TTI time parameter.

In conjunction with the tenth possible implementation of the first aspect, in a thirteenth possible implementation manner, the determining unit is further configured to:

A first scheduling command carrying the HARQ feedback TTI is determined.

With reference to the thirteenth possible implementation manner of the foregoing aspect, in a fourteenth possible implementation manner, the first scheduling command is to indicate a second physical transmission resource;

When the communication unit sends or receives the HARQ feedback information, it specifically:

Determining, according to the first scheduling command, the second physical transmission resource; using the HARQ feedback TTI time parameter carried by the first scheduling command, and the second physical transmission resource, sending or receiving HARQ feedback information.

With reference to the first aspect, or the first to the fourteenth possible implementation manners of the first aspect, in the fifteenth possible implementation manner, the communication unit is further configured to:

When it is determined that the data transmission fails, the data is retransmitted.

In conjunction with the fifteenth possible implementation of the first aspect, in a sixteenth possible implementation, the determining unit is further configured to:

Determining a third mapping rule, where the third mapping rule includes a correspondence between a TTI time parameter and a round trip time RTT time parameter; and determining, from the third mapping rule, an RTT time parameter corresponding to the target TTI time parameter .

With reference to the sixteenth possible implementation manner of the first aspect, in the seventeenth possible implementation manner, when the communications unit retransmits the data, specifically:

The data is retransmitted based on the determined RTT time parameters.

In conjunction with the fifteenth possible implementation of the first aspect, in the eighteenth possible implementation, the determining unit is further configured to:

A first scheduling command carrying the RTT time parameter is determined.

With reference to the eighteenth possible implementation of the first aspect, in a nineteenth possible implementation, the first scheduling command is to indicate a third physical resource;

When the communication unit retransmits the data, it specifically:

And retransmitting the data according to the RTT time parameter carried by the first scheduling command and the third physical resource.

In conjunction with the sixteenth or eighteenth possible implementations of the first aspect, in the twentieth possible implementation, the determining unit is further configured to:

After the RTT time parameter is separated from the time interval for transmitting data, receiving a second scheduling command, where the second scheduling command indicates a fourth physical transmission resource;

When the communication unit retransmits the data, it specifically:

Determining, according to the second scheduling command, a fourth physical transmission resource; and using the fourth physical transmission resource, retransmitting the data.

With reference to the twentieth possible implementation of the first aspect, in the twenty-first possible implementation manner, when the communication unit retransmits the data, specifically:

Using the scheduling identifier included in the first mapping rule to traverse the second scheduling command; the TTI time parameter corresponding to the scheduling identifier of the second scheduling command is successfully descrambled as the retransmission TTI time parameter Retransmitting the data using the retransmitted TTI time parameter.

With reference to the fifteenth to twenty-first possible implementation manners of the first aspect, in the twenty-second possible implementation manner, the determining unit is further configured to:

Determining a fourth mapping rule, where the fourth mapping rule includes a correspondence between a TTI time parameter and a number of retransmissions; determining, from the fourth mapping rule, a number of retransmissions corresponding to the target TTI time parameter; The number of times the data has been retransmitted is less than the determined number of retransmissions.

In combination with the first aspect, or the first to twenty-second possible implementations of the first aspect, In a twenty-third possible implementation manner, the determining unit is further configured to:

Determining a fifth mapping rule, where the fifth mapping rule includes a correspondence between a TTI time parameter and a bearer type; determining, from the fifth mapping rule, a bearer type corresponding to the target TTI time parameter; determining the sending Or the received data belongs to the determined bearer type.

In a second aspect, a base station is provided, including:

a determining unit, configured to determine a transmission time interval TTI configuration parameter, where the TTI configuration parameter indicates a TTI time parameter, where the number of TTI time parameters indicated by the TTI configuration parameter is greater than or equal to 2, and the time indicated by different TTI time parameters Different intervals;

And a sending unit, configured to send the TTI configuration parameter to the user equipment UE.

With reference to the second aspect, in a first possible implementation manner, the TTI time parameter is in units of milliseconds ms, or a time occupied by one orthogonal frequency division multiplexing OFDM symbol, or an OFDM symbol The number is in units.

With reference to the second aspect, or the first possible implementation manner of the second aspect, in a second possible implementation manner, the sending unit is further configured to:

Sending a first scheduling command to the UE.

With reference to the second possible implementation manner of the second aspect, in a third possible implementation manner, the first scheduling command carries a TTI time parameter, or a bit identifier corresponding to the TTI time parameter;

The first scheduling command indicates a first physical transmission resource.

With reference to the second to third possible implementation manners of the second aspect, in a fourth possible implementation, the first scheduling command carries a HARQ feedback TTI;

The first scheduling command indicates a second physical transmission resource.

With reference to the second to fourth possible implementation manners of the second aspect, in a fifth possible implementation manner, the first scheduling command carries a round-trip time RTT time parameter;

The first scheduling command indicates a third physical resource.

With reference to the second aspect, or the first to fifth possible implementation manners of the second aspect, in a sixth possible implementation, the sending unit is further configured to:

Sending a second scheduling command to the UE, where the second scheduling command indicates a fourth physical transmission resource.

In a third aspect, a method of data communication is provided, including:

The network entity determines a transmission time interval TTI configuration parameter, where the TTI configuration parameter indicates a TTI time parameter, the number of TTI time parameters indicated by the TTI configuration parameter is greater than or equal to 2, and different time intervals indicated by different TTI time parameters are different;

Determining, by the network entity, a TTI time parameter from the TTI time parameter as a target TTI time parameter;

The network entity sends or receives data using the target TTI time parameter.

With reference to the third aspect, in a first possible implementation manner, the network entity is a base station or a user equipment UE.

With reference to the third aspect, or the first possible implementation manner of the third aspect, in a second possible implementation manner, when the network entity is a UE, the network entity determines a TTI configuration parameter, including:

The network entity receives the TTI configuration parameter sent by the network side device.

With reference to the third aspect, or the first to second possible implementation manners of the third aspect, in a third possible implementation manner, the TTI time parameter is in milliseconds ms, or is divided by an orthogonal frequency The unit of time occupied by the OFDM symbol, or the number of OFDM symbols.

With reference to the third aspect, or the first to third possible implementation manners of the third aspect, in a fourth possible implementation, the network entity determines a TTI time parameter from the TTI time parameter as the target TTI time parameter. ,include:

Determining, by the network entity, a first mapping rule and a first scheduling command, where the first mapping rule includes a correspondence between a scheduling identifier and the TTI time parameter;

The network entity determines the target TTI time parameter according to the first scheduling command and the first mapping relationship.

With reference to the fourth possible implementation of the third aspect, in a fifth possible implementation, the network entity determines the target TTI according to the first scheduling command and the first mapping relationship Time parameters, including:

The network entity traverses and descrambles the first scheduling command by using a scheduling identifier included in the first mapping rule;

The network entity will successfully descramble the TTI time parameter corresponding to the scheduling identifier of the first scheduling command as the target TTI time parameter.

With reference to the third aspect, or the first to third possible implementation manners of the third aspect, in a sixth possible implementation manner, the network entity determines a TTI time parameter from the TTI time parameter as the target TTI time parameter. ,include:

Determining, by the network entity, a first scheduling command that carries a TTI time parameter;

The network entity uses the TTI time parameter carried by the first scheduling command as the target TTI time parameter.

With reference to the third aspect, or the first to third possible implementation manners of the third aspect, in a seventh possible implementation, the network entity determines a TTI time parameter from the TTI time parameter as the target TTI time parameter. ,include:

Determining, by the network entity, a first scheduling command that carries a bit identifier corresponding to a TTI time parameter;

The network entity uses a TTI time parameter corresponding to the bit identifier as the target TTI time parameter.

With reference to the fourth to seventh possible implementation manners of the third aspect, in an eighth possible implementation manner, the first scheduling command indicates a first physical transmission resource;

The network entity sends or receives data by using the target TTI time parameter, including:

Determining, by the network entity, the first physical transmission resource according to the first scheduling command;

The network entity sends or receives the data by using the target TTI time parameter and the first physical transmission resource.

With reference to the third aspect, or the first to the eighth possible implementation manners of the third aspect, in the ninth possible implementation manner, the network entity sends or receives data by using the target TTI time parameter, including:

The network entity transmits or receives the data using at least two of the target TTI time parameters.

With the third aspect, or the first to the ninth possible implementation manners of the third aspect, in the tenth possible implementation manner, after the network entity receives the data by using the target TTI time parameter, the method further includes:

Transmitting, by the network entity, hybrid automatic repeat request HARQ feedback information;

After the network entity sends the data by using the target TTI time parameter, the method further includes:

The network entity receives HARQ feedback information.

With reference to the tenth possible implementation manner of the third aspect, in the eleventh possible implementation manner, before the sending, by the network entity, the HARQ feedback information, the network entity further includes:

Determining, by the network entity, a second mapping rule, where the second mapping rule includes a correspondence between a TTI time parameter and a HARQ feedback TTI time parameter;

And determining, by the network entity, a HARQ feedback TTI time parameter corresponding to the target TTI time parameter according to the second mapping rule.

With reference to the eleventh possible implementation manner of the third aspect, in a twelfth possible implementation manner, the network entity sends the HARQ feedback information, including:

The network entity sends the HARQ feedback information by using the determined HARQ feedback TTI time parameter;

The network entity receives the HARQ feedback information, including:

The network entity receives the HARQ feedback information by using the determined HARQ feedback TTI time parameter.

With reference to the tenth possible implementation manner of the third aspect, in the thirteenth possible implementation manner, before the sending, by the network entity, the HARQ feedback information, the network entity further includes:

The network entity determines a first scheduling command that carries a HARQ feedback TTI.

With reference to the thirteenth possible implementation manner of the third aspect, in the fourteenth possible implementation manner, the first scheduling command indicates a second physical transmission resource;

The network entity sends the HARQ feedback information, including:

Determining, by the network entity, the second physical transmission resource according to the first scheduling command;

The network entity adopts a HARQ feedback TTI time parameter carried by the first scheduling command, and the second physical transmission resource sends HARQ feedback information;

The network entity receives the HARQ feedback information, including:

Determining, by the network entity, the second physical transmission resource according to the first scheduling command;

The network entity adopts a HARQ feedback TTI time parameter carried by the first scheduling command, and the second physical transmission resource receives HARQ feedback information.

With reference to the third aspect, or the first to the fourteenth possible implementation manners of the third aspect, in the fifteenth possible implementation manner, after the network entity sends or receives data by using the target TTI time parameter, Also includes:

The network entity retransmits the data when the data transmission fails.

In conjunction with the fifteenth possible implementation of the third aspect, in a sixteenth possible implementation, before the network entity retransmits the data, the method further includes:

Determining, by the network entity, a third mapping rule, where the third mapping rule includes a correspondence between a TTI time parameter and a round trip time RTT time parameter;

The network entity determines, from the third mapping rule, an RTT time parameter corresponding to the target TTI time parameter.

In conjunction with the sixteenth possible implementation of the third aspect, in a seventeenth possible implementation, the network entity retransmits the data, including:

The network entity retransmits the data according to the determined RTT time parameter.

In conjunction with the fifteenth possible implementation of the third aspect, in the eighteenth possible implementation, before the network entity retransmits the data, the method further includes:

The network entity determines a first scheduling command that carries an RTT time parameter.

With the eighteenth possible implementation manner of the third aspect, in a nineteenth possible implementation, the first scheduling command is to indicate a third physical resource;

Retransmitting the data by the network entity, including:

The RTT time parameter carried by the network entity according to the first scheduling command, and the third The physical resource retransmits the data.

With reference to the fifteenth possible implementation manner of the third aspect, in the twentieth possible implementation, before the network entity retransmits the data, the method further includes:

After the RTT time parameter is separated from the time interval for transmitting data, receiving a second scheduling command, where the second scheduling command indicates a fourth physical transmission resource;

When the network entity retransmits the data, it specifically:

Determining, according to the second scheduling command, a fourth physical transmission resource; and using the fourth physical transmission resource, retransmitting the data.

With reference to the twentieth possible implementation of the third aspect, in a twenty-first possible implementation manner, the network entity retransmits the data, including:

The network entity traverses and descrambles the second scheduling command by using a scheduling identifier included in the first mapping rule;

The network entity successfully descrambles the TTI time parameter corresponding to the scheduling identifier of the second scheduling command as a retransmission TTI time parameter;

The network entity retransmits the data by using the retransmission TTI time parameter.

With reference to the fifteenth to twenty-first possible implementation manners of the third aspect, in the twenty-second possible implementation manner, before the network entity retransmits the data, the method further includes:

Determining, by the network entity, a fourth mapping rule, where the fourth mapping rule includes a correspondence between a TTI time parameter and a number of retransmissions;

Determining, by the network entity, the number of retransmissions corresponding to the target TTI time parameter from the fourth mapping rule;

The network entity determines that the number of retransmissions for the data has been less than the determined number of retransmissions.

With reference to the third aspect, and the first to the twenty-second possible implementation manners of the third aspect, in the twenty-third possible implementation manner, the network entity sends or receives data by using the target TTI time parameter Previously, it also included:

Determining, by the network entity, a fifth mapping rule, where the fifth mapping rule includes a correspondence between a TTI time parameter and a bearer type;

Determining, by the network entity, a bearer type corresponding to the target TTI time parameter from the fifth mapping rule;

The network entity determines that the transmitted or received data belongs to the determined bearer type.

In a fourth aspect, a method of data communication is provided, including:

The base station determines a transmission time interval TTI configuration parameter, where the TTI configuration parameter indicates a TTI time parameter, the number of TTI time parameters indicated by the TTI configuration parameter is greater than or equal to 2, and different time intervals indicated by different TTI time parameters are different;

The base station sends the TTI configuration parameter to the user equipment UE.

With reference to the fourth aspect, in a first possible implementation manner, the TTI time parameter is in units of milliseconds ms, or in units of time occupied by one orthogonal frequency division multiplexing OFDM symbol, or in an OFDM symbol The number is in units.

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

The base station sends a first scheduling command to the UE.

With reference to the second possible implementation manner of the fourth aspect, in a third possible implementation manner, the first scheduling command carries a TTI time parameter, or a bit identifier corresponding to the TTI time parameter;

The first scheduling command indicates a first physical transmission resource.

With reference to the second to third possible implementation manners of the fourth aspect, in a fourth possible implementation, the first scheduling command carries a HARQ feedback TTI;

The first scheduling command indicates a second physical transmission resource.

With reference to the second to fourth possible implementation manners of the fourth aspect, in a fifth possible implementation manner, the first scheduling command carries a round-trip time RTT time parameter;

The first scheduling command indicates a third physical resource.

With reference to the fourth aspect, or the first to fifth possible implementation manners of the fourth aspect, in a sixth possible implementation, the method further includes:

The base station sends a second scheduling command to the UE, where the second scheduling command indicates a fourth physics Transfer resources.

In a fifth aspect, a system for data communication is provided, comprising:

The third embodiment, or the network entity of the user equipment described in the first to the twenty-third possible implementation manners of the third aspect, and the fourth to sixth aspects, or the first to sixth aspects of the fourth aspect A base station as described in a possible implementation.

A method for data communication is provided in the embodiment of the present invention: the network entity determines a transmission time interval TTI configuration parameter, and the TTI configuration parameter indicates a TTI time parameter, and the number of TTI time parameters indicated by the TTI configuration parameter is greater than or equal to 2, different TTIs. The time interval indicated by the time parameter is different; the network entity determines a TTI time parameter from the TTI time parameter as the target TTI time parameter; the network entity sends or receives data using the target TTI time parameter, in which a TTI time parameter is determined. The TTI time parameter is used as the target TTI time parameter, and the number of TTI time parameters is greater than or equal to 2; the network entity uses the target TTI time parameter to send or receive data, so that the TTI time parameter used when transmitting or receiving data is no longer fixed. It will change with the application scenario, thus solving the defect of poor flexibility, and thus avoiding the problems of serious resource waste and large physical control channel overhead.

DRAWINGS

1A is a schematic diagram of a network entity according to an embodiment of the present invention;

FIG. 1B is another schematic diagram of a network entity according to an embodiment of the present invention;

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

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

3 is a system for data communication according to an embodiment of the present invention;

4A is a flowchart of data communication according to an embodiment of the present invention;

4B is a schematic diagram of transmission of data communication according to an embodiment of the present invention;

FIG. 5 is another flowchart of data communication according to an embodiment of the present invention.

detailed description

The present invention will be further described in detail with reference to the accompanying drawings, in which FIG. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

The following is a brief description of the possible effects of sending or receiving data using different TTI time parameters.

In actual applications, when different TTI time parameters are used to send or receive data, the power overhead and resource overhead are different. For example, if the TTI time parameter with a large time interval is used to send or receive data, the power consumption is small. In a power limited scenario, the TTI time parameter with a large time interval may be used to send or receive data. If the data to be sent or received is small, if the TTI time parameter with a large time interval is used for sending or receiving, there will be a waste of resources. In order to avoid waste of resources, it is to be sent or received. In such a scenario where the data is small, the TTI time parameter with a small time interval indicated may be used to transmit or receive data. Sending or receiving data with different TTI time parameters for different application scenarios can improve the reliability of transmission and avoid waste of resources.

For example, when there are two TTI time parameters of 0.5 ms and 1 ms, when the same data is transmitted in 1 ms and 0.5 ms respectively, the power overhead when the data is transmitted in 1 ms is less than the power overhead when the data is transmitted in 0.5 ms, therefore, When the transmit power is limited, the TTI time parameter with a large time interval may be used to transmit or receive data, thereby improving the success rate of data transmission and ensuring the reliability of data transmission.

For example, when small data is sent by using the TTI time parameter with a large time interval, the resource overhead is relatively large, and there is a waste of resources. For example, only 0.5 physical resource blocks are needed for the data to be sent, if When a 1 ms TTI time parameter is used, one physical resource block is used to transmit data, and 0.5 physical resource blocks are wasted.

For example, when the time interval indicated by the TTI time parameter is small, the physical control channel overhead may be relatively large, and the required pilot signal ratio is larger, which may affect the physical resource utilization. Therefore, when the big data is sent, the indication is used. The TTI time parameter with a large interval can reduce the physical control channel overhead and improve the utilization efficiency of physical resources.

For example, when the time interval indicated by the TTI time parameter is different, the delay when transmitting or receiving data is different, and when the time interval indicated by the TTI time parameter is large, the delay is large, and the service with strict delay is required. The data may be transmitted or received preferentially using the TTI time parameter with a smaller time interval indicated.

The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings, and the preferred embodiments of the present invention are intended to illustrate and explain the invention, and not to limit the invention, and The embodiments in the application and the features in the embodiments may be combined with each other.

As shown in FIG. 1A, an embodiment of the present invention provides a network entity, where the network entity includes a determining unit 10 and a communication unit 11, where:

The determining unit 10 is configured to determine a transmission time interval TTI configuration parameter, where the TTI configuration parameter indicates a TTI time parameter, the number of TTI time parameters indicated by the TTI configuration parameter is greater than or equal to 2, and different time intervals indicated by different TTI time parameters are different;

The determining unit 10 is further configured to: determine a TTI time parameter from the TTI time parameter as the target TTI time parameter;

The communication unit 11 is configured to send or receive data by using a target TTI time parameter.

In the embodiment of the present invention, optionally, the network entity is a base station or a user equipment (UE), where the base station may be a BS (Base Station), or an eNode B (Evolved Node B, an evolved base station). ).

In the embodiment of the present invention, when the network entity is the UE, when the determining unit 10 determines the TTI configuration parameter, specifically:

Receives TTI configuration parameters sent by the network side device.

In the embodiment of the present invention, optionally, the TTI time parameter is in milliseconds ms, or is an OFDM (Orthogonal Frequency Division Multiplexing) symbol. The time taken, or the number of OFDM symbols.

In the embodiment of the present invention, optionally, when the determining unit 10 determines a TTI time parameter from the TTI time parameter as the target TTI time parameter, specifically:

Determining a first mapping rule and a first scheduling command, where the first mapping rule includes a correspondence between the scheduling identifier and the TTI time parameter; and determining a target TTI time parameter according to the first scheduling command and the first mapping relationship.

In the embodiment of the present invention, optionally, when the determining unit 10 determines the target TTI time parameter according to the first scheduling command and the first mapping relationship, specifically:

Despising the first scheduling command by using the scheduling identifier included in the first mapping rule; and successfully decoding the TTI time parameter corresponding to the scheduling identifier of the first scheduling command as the target TTI time parameter.

In the embodiment of the present invention, optionally, when the determining unit 10 determines a TTI time parameter from the TTI time parameter as the target TTI time parameter, specifically:

The first scheduling command that carries the TTI time parameter is determined, and the TTI time parameter carried by the first scheduling command is used as the target TTI time parameter.

In the embodiment of the present invention, optionally, when the determining unit 10 determines a TTI time parameter from the TTI time parameter as the target TTI time parameter, specifically:

Determining a first scheduling command that carries a bit identifier corresponding to the TTI time parameter; and using a TTI time parameter corresponding to the bit identifier as a target TTI time parameter.

In the embodiment of the present invention, optionally, the first scheduling command indicates the first physical transmission resource;

At this time, when the communication unit 11 transmits or receives data by using the target TTI time parameter, specifically:

Determining, according to the first scheduling command, the first physical transmission resource; transmitting or receiving data by using the target TTI time parameter and the first physical transmission resource.

In the embodiment of the present invention, optionally, when the communication unit 11 sends or receives data by using the target TTI time parameter, specifically:

Data is transmitted or received using at least two target TTI time parameters.

In the embodiment of the present invention, further, the communication unit 11 is further configured to:

Send or receive HARQ (Hybrid Automatic Repeat Request) feedback information.

In the embodiment of the present invention, further, the determining unit 10 is further configured to:

Determining a second mapping rule, where the second mapping rule includes a correspondence between a TTI time parameter and a HARQ feedback TTI time parameter; and determining a HARQ feedback TTI time parameter corresponding to the target TTI time parameter according to the second mapping rule.

In the embodiment of the present invention, optionally, when the communication unit 11 sends or receives the HARQ feedback information, specifically:

The HARQ feedback information is transmitted or received by using the determined HARQ feedback TTI time parameter.

In the embodiment of the present invention, further, the determining unit 10 is further configured to:

A first scheduling command carrying the HARQ feedback TTI is determined.

In the embodiment of the present invention, optionally, the first scheduling command indicates the second physical transmission resource;

At this time, when the communication unit 11 transmits or receives the HARQ feedback information, it specifically:

The second physical transmission resource is determined according to the first scheduling command; the HARQ feedback TTI time parameter carried by the first scheduling command, and the second physical transmission resource are used to send or receive the HARQ feedback information.

In the embodiment of the present invention, further, the communication unit 11 is further configured to:

Re-transmit data when it is determined that the data transfer failed.

In the embodiment of the present invention, further, the determining unit 10 is further configured to:

Determining a third mapping rule, where the third mapping rule includes a correspondence between the TTI time parameter and the round-trip time RTT time parameter; and determining, from the third mapping rule, an RTT time parameter corresponding to the target TTI time parameter.

In the embodiment of the present invention, optionally, when the communication unit 11 retransmits data, specifically:

The data is retransmitted based on the determined RTT time parameters.

In the embodiment of the present invention, further, the determining unit 10 is further configured to:

A first scheduling command carrying the RTT time parameter is determined.

In the embodiment of the present invention, optionally, the first scheduling command indicates the third physical resource;

When the communication unit 11 retransmits data, it specifically:

And retransmitting the data according to the RTT time parameter carried by the first scheduling command and the third physical resource.

In the embodiment of the present invention, further, the determining unit 10 is further configured to:

Receiving, after the time interval RTT time parameter of transmitting data, a second scheduling command, where the second scheduling command indicates a fourth physical transmission resource;

When the communication unit 10 retransmits data, it specifically:

Determining, according to the second scheduling command, the fourth physical transmission resource; using the fourth physical transmission resource, retransmitting the data.

In the embodiment of the present invention, optionally, when the communication unit 10 retransmits data, the following is specifically:

Using the scheduling identifier included in the first mapping rule to traverse the descrambled second scheduling command; the TTI time parameter corresponding to the scheduling identifier of the second scheduling command is successfully descrambled as the retransmission TTI time parameter; and the retransmission TTI time parameter is used Pass data.

In the embodiment of the present invention, further, the determining unit 10 is further configured to:

Determining a fourth mapping rule, where the fourth mapping rule includes a correspondence between the TTI time parameter and the number of retransmissions; determining, from the fourth mapping rule, a number of retransmissions corresponding to the target TTI time parameter; determining that the number of retransmissions for the data is less than The number of retransmissions determined.

It should be noted that the number of retransmissions referred to herein refers to the maximum number of retransmissions. Therefore, the operations performed by the determining unit 10 described above can also be described as follows:

Determining a fourth mapping rule, where the fourth mapping rule includes a correspondence between a TTI time parameter and a maximum number of retransmissions; determining, from the fourth mapping rule, a maximum number of retransmissions corresponding to the target TTI time parameter; determining that the data has been retransmitted The number of times is less than the determined maximum number of retransmissions

It should be noted that the number of retransmissions may also be the number of transmissions. In this case, the number of transmissions is the sum of the number of retransmissions and one.

In the embodiment of the present invention, optionally, when the TTI time parameter used when initially transmitting data and the TTI time parameter used when retransmitting data are different, the number of retransmissions may be corresponding to the TTI time parameter used in the initial transmission. It can also correspond to the TTI time parameter used in retransmission.

In the embodiment of the present invention, further, the determining unit 10 is further configured to:

Determining a fifth mapping rule, where the fifth mapping rule includes a correspondence between the TTI time parameter and the bearer type; determining, from the fifth mapping rule, a bearer type corresponding to the target TTI time parameter; determining that the sent or received data belongs to the determined Bearer type.

As shown in FIG. 1B, an embodiment of the present invention provides a network entity, where the network entity includes a processor 100 and a transceiver 110, where:

The processor 100 is configured to determine a transmission time interval TTI configuration parameter, where the TTI configuration parameter indicates a TTI time parameter, where the number of TTI time parameters indicated by the TTI configuration parameter is greater than or equal to 2, and different time intervals indicated by different TTI time parameters are different;

The processor 100 is further configured to: determine a TTI time parameter from the TTI time parameter as the target TTI time parameter;

The transceiver 110 is configured to send or receive data by using a target TTI time parameter.

It should be noted that the processor 100 can also perform other operations performed by the determining unit 10 shown in FIG. 1A, and the transceiver 110 can also perform other operations performed by the communication unit 11 shown in FIG. 1A.

As shown in FIG. 2A, an embodiment of the present invention provides a base station, where the base station includes a determining unit 20 and a sending unit 21, where:

The determining unit 20 is configured to determine a transmission time interval TTI configuration parameter, where the TTI configuration parameter indicates a TTI time parameter, where the number of TTI time parameters indicated by the TTI configuration parameter is greater than or equal to 2, and different time intervals indicated by different TTI time parameters are different;

The sending unit 21 is configured to send the TTI configuration parameter to the user equipment UE.

In the embodiment of the present invention, optionally, the TTI time parameter is in units of milliseconds ms, or in units of time occupied by one orthogonal frequency division multiplexing OFDM symbol, or in units of OFDM symbols.

In the embodiment of the present invention, further, the sending unit 21 is further configured to:

Sending a first scheduling command to the UE.

In the embodiment of the present invention, optionally, the first scheduling command carries a TTI time parameter, or a bit identifier corresponding to the TTI time parameter;

The first scheduling command indicates the first physical transmission resource.

In the embodiment of the present invention, optionally, the first scheduling command carries a HARQ feedback TTI;

The first scheduling command indicates a second physical transmission resource.

In the embodiment of the present invention, optionally, the first scheduling command carries a round-trip time RTT time parameter;

The first scheduling command indicates a third physical resource.

In the embodiment of the present invention, further, the sending unit 21 is further configured to:

Sending a second scheduling command to the UE, where the second scheduling command indicates a fourth physical transmission resource.

Referring to FIG. 2B, an embodiment of the present invention provides a base station, where the base station includes a processor 200 and a transmitter 210, where:

The processor 200 is configured to determine a transmission time interval TTI configuration parameter, where the TTI configuration parameter indicates a TTI time parameter, where the number of TTI time parameters indicated by the TTI configuration parameter is greater than or equal to 2, and different time intervals indicated by different TTI time parameters are different;

The transmitter 210 is configured to send the TTI configuration parameter to the user equipment UE.

It should be noted that the processor 200 can also perform other operations performed by the determining unit 20 in FIG. 2A, and the transmitter 210 can also perform other operations performed by the transmitting unit 21 in FIG. 2A.

Based on the foregoing solution, referring to FIG. 3, in the embodiment of the present invention, a system for data communication is further provided, where the system includes a network entity as shown in FIG. 1A or FIG. 1B as a user equipment, and FIG. 2A or The base station shown in Figure 2B.

Based on the above solution, referring to FIG. 4A, in the embodiment of the present invention, a process of data communication is as follows:

Step 400: The network entity determines a TTI configuration parameter, and the TTI configuration parameter indicates a TTI time parameter. The number of TTI time parameters indicated by the TTI configuration parameter is greater than or equal to 2, and different time intervals indicated by different TTI time parameters are different.

Step 410: The network entity determines a TTI time parameter from the TTI time parameter as the target TTI time parameter.

Step 420: The network entity sends or receives data using the target TTI time parameter.

In the embodiment of the present invention, optionally, the network entity may be a base station, or may be a UE, This is not specifically limited. When the network entity is a base station, the base station may be a BS, a Node B, or an eNode B. The foregoing describes a base station under the current communication system architecture. Of course, with the communication technology. The development of the base station can also be in the form of other communication system architectures, and will not be described in detail here.

In the embodiment of the present invention, the TTI configuration parameter may be the time interval indicated by the TTI time parameter. In this case, the TTI configuration parameter is a TTI time parameter. For example, the TTI configuration parameter is 0.1 ms, 0.5 ms, 0.8 ms, 1 ms, or The TTI configuration parameter may also be a bit identifier corresponding to the time interval indicated by the TTI time parameter. For example, the TTI configuration parameter is 00, 01, 10, and 11, where 00 corresponds to 0.1 ms, 01 and 0.5 ms. Corresponding, 10 corresponds to 0.8ms, and 11 corresponds to 1ms.

In the embodiment of the present invention, when the network entity is the UE, when the network entity determines the TTI configuration parameter, the following may be adopted:

The network entity receives the TTI configuration parameters sent by the network side device.

That is to say, when determining the TTI configuration parameter, the UE may use the TTI configuration parameter sent by the network side device as the determined TTI configuration parameter. Of course, there may be other determination manners, which are not detailed here.

In the embodiment of the present invention, the TTI time parameter may be in units of milliseconds ms, for example, 0.1 ms, 0.2 ms, 0.5 ms, 1 ms, and the like.

Alternatively, it may be in units of time occupied by one OFDM symbol, for example, 1 OFDM symbol, 2 OFDM symbol, 7 OFDM symbol, and 14 OFDM symbol.

Of course, other units may also be used, and no specific limitation is made here.

In the embodiment of the present invention, the time interval indicated by the TTI time parameter may be a time interval specified by the protocol, or may be a time interval before the protocol is specified. For example, the TTI configuration parameter is {0.3ms, 0.5ms, 1ms}, where 1ms can be the TTI time parameter specified by the protocol.

In the embodiment of the present invention, when the network entity uses the target TTI time parameter to send or receive data, it does not say that the time interval corresponding to the time interval indicated by the target TTI time parameter is intervald, but the data is sent or received, but at the target TTI time. The time interval indicated by the parameter corresponds to the duration Send or receive data.

For example, the time interval indicated by the target TTI time parameter is 0.5 ms, not to say that the data is transmitted or received after the interval of 0.5 ms, but the data is transmitted or received at the time of 0.5 ms.

In the embodiment of the present invention, when the network entity determines a TTI time parameter from the TTI time parameter as the target TTI time parameter, the method may be as follows:

The network entity determines a first mapping rule and a first scheduling command, where the first mapping rule includes a correspondence between the scheduling identifier and the TTI time parameter;

The network entity determines the target TTI time parameter according to the first scheduling command and the first mapping relationship.

When the network entity determines the target TTI time parameter according to the first scheduling command and the first mapping relationship, the method may be as follows:

The network entity traverses the descrambled first scheduling command by using the scheduling identifier included in the first mapping rule;

The network entity will successfully descramble the TTI time parameter corresponding to the scheduling identifier of the first scheduling command as the target TTI time parameter.

For example, the first mapping rule includes the correspondence between the scheduling identifier 1 (1001) and 0.1 ms, the correspondence between the scheduling identifier 2 (1002) and 0.2 ms, the correspondence between the scheduling identifier 3 (1003) and 0.5 ms, and the scheduling identifier 4 Correspondence relationship between (1004) and 0.8ms, and the correspondence between the scheduling identifier 5 (1005) and 1ms, after receiving the first scheduling command, using the scheduling identifier 1, the scheduling identifier 2, the scheduling identifier 3, the scheduling identifier 4, and the scheduling identifier 5 descrambling the first scheduling command, if the scheduling identifier 1 successfully descrambles the first scheduling command, then 0.1ms is used as the target TTI time parameter; if the scheduling identifier 5 successfully descrambles the first scheduling command, 1ms is taken as the target TTI time parameter .

In the embodiment of the present invention, the different scheduling identifiers may be corresponding to the same TTI time parameter, and are not specifically limited herein.

In the embodiment of the present invention, the scheduling identifier may be a Scheduling RNTI (Radio Network Temporary Identity).

The foregoing describes that the target TTI time parameter is determined according to the first scheduling command and the first mapping rule. Of course, in order to improve the efficiency of determining the target TTI time parameter, the first scheduling command may also directly carry the TTI time parameter. In an embodiment of the invention, the network entity participates in the TTI time When determining a TTI time parameter as the target TTI time parameter, the number can be selected as follows:

The network entity determines a first scheduling command that carries a TTI time parameter;

The network entity uses the TTI time parameter carried by the first scheduling command as the target TTI time parameter.

For example, if the first scheduling command carries 0.1 ms, 0.1 ms is used as the target TTI time parameter; when the first scheduling command carries 0.5 ms, 0.5 ms is used as the target TTI time parameter; the first scheduling command carries 1 ms. Then, 1ms is taken as the target TTI time parameter.

The above description is that the first scheduling command directly carries the TTI time parameter. Of course, in order to reduce the amount of information carried by the first scheduling command, the first scheduling command may also carry the bit identifier corresponding to the TTI time parameter, so In the embodiment of the present invention, when the network entity determines a TTI time parameter from the TTI time parameter as the target TTI time parameter, the network entity may select the following method:

The network entity determines a first scheduling command that carries the bit identifier corresponding to the TTI time parameter; the network entity uses the TTI time parameter corresponding to the bit identifier as the target TTI time parameter.

For example, 00 corresponds to 0.1ms, 01 corresponds to 0.2ms, 10 corresponds to 0.5ms, and 11 corresponds to 1ms. The first scheduling command can carry 11 or carry 00, or can carry 10 or 01. .

In the embodiment of the present invention, optionally, the first scheduling command indicates the first physical transmission resource;

At this time, when the network entity sends or receives data by using the target TTI time parameter, the following may be adopted:

The network entity determines the first physical transmission resource according to the first scheduling command;

Specifically, the first physical transmission resource may be one or more PRBs (Physical Resource Blocks), or may be one or more subcarriers.

Further, the first physical transmission resource may further include a modulation and coding mode, or a redundancy version.

The network entity sends or receives data using the target TTI time parameter and the first physical transmission resource.

In the embodiment of the present invention, in order to improve data reliability, the network entity may send or receive data in a bundled manner. Therefore, the network entity sends or receives the target TTI time parameter. When the data is optional, the following methods can be used:

The network entity transmits or receives data using at least two target TTI time parameters.

It should be noted that, when the network entity sends or receives data by using at least two target TTI time parameters, the data is repeatedly sent or received on the time interval indicated by each of the at least two target TTI time parameters.

As shown in FIG. 4B, the time interval indicated by the target TTI time parameter is 0.5 ms, and the network entity can transmit data by using 0.5 ms, but in order to improve the reliability of the transmitted data, data is sent by using two target TTI time parameters, that is, one is adopted. After transmitting data for 0.5ms, the data is transmitted using a 0.5ms.

The above description is based on two target TTI time parameters. Of course, in order to further improve the reliability of the transmission data, data may be transmitted using two or more target TTI time parameters.

In the embodiment of the present invention, after the network entity receives the data by using the target TTI time parameter, the following operations are also included:

The network entity sends HARQ feedback information;

After the network entity sends data by using the target TTI time parameter, the following operations are also included:

The network entity receives the HARQ feedback information.

When the network entity sends or receives the HARQ feedback information, the HARQ feedback TTI time parameter is used to send or receive the HARQ feedback information. Therefore, before the network entity sends or receives the HARQ feedback information, the network entity also includes the following operations:

The network entity determines a second mapping rule, where the second mapping rule includes a correspondence between a TTI time parameter and a HARQ feedback TTI time parameter;

The network entity determines a HARQ feedback TTI time parameter corresponding to the target TTI time parameter according to the second mapping rule.

For example, the TTI time parameter of 0.1 ms corresponds to the HARQ feedback TTI time parameter of 0.2 ms, the TTI time parameter of 0.2 ms corresponds to the HARQ feedback TTI time parameter of 0.2 ms, the TTI time parameter of 0.5 ms corresponds to the HARQ feedback TTI time parameter of 0.5 ms, and the TTI time parameter corresponds. 1ms corresponds to the HARQ feedback TTI time parameter 1ms. If the target TTI time parameter is 0.1ms, the HARQ feedback TTI The time parameter is 0.5ms.

In the embodiment of the present invention, different HARQ feedback TTI time parameters may correspond to the same TTI time parameter, which is not specifically limited herein.

When the network entity sends the HARQ feedback information, the following methods are available:

The network entity sends the HARQ feedback information by using the determined HARQ feedback TTI time parameter;

When the network entity receives the HARQ feedback information, the following options are available:

The network entity receives the HARQ feedback information by using the determined HARQ feedback TTI time parameter.

The above description is to determine the HARQ feedback TTI according to the second mapping rule. Of course, the HARQ feedback TTI may also be carried in the first scheduling command. Therefore, in the embodiment of the present invention, before the network entity sends or receives the HARQ feedback information, the network entity further includes Do the following:

The network entity determines a first scheduling command that carries the HARQ feedback TTI.

At this time, the first scheduling command indicates the second physical transmission resource;

In the embodiment of the present invention, optionally, when the first scheduling command indicates the second physical transmission resource, the second physical transmission resource may be directly carried in the first scheduling command, or the resource location used by the first scheduling command is implicit. Indicates a second physical transmission resource.

Wherein, when the resource location used by the first scheduling command implicitly indicates the second physical transmission resource, specifically, the CCE (Control Channel Element) location index used by the first scheduling command may be used to indicate the second physical transmission. Resources.

In the embodiment of the present invention, optionally, if the first scheduling command is for uplink data scheduling, the second physical transmission resource may also be based on physical transmission resources used by the uplink data (ie, the first physical transmission mentioned above). The location of the resource) is obtained. In the embodiment of the present invention, the second physical transmission resource may be a PUCCH (Physical Uplink Control Channel), which is an uplink feedback resource of downlink data, or may be a PHICH (Physical Hybrid-ARQ Indicator Channel). , physical HARQ indicator channel), as a downlink feedback resource of uplink data. Of course, the specific channel is not limited by the present invention.

When the network entity sends the HARQ feedback information, the following options are available:

The network entity determines the second physical transmission resource according to the first scheduling command;

The network entity uses the HARQ feedback TTI time parameter carried by the first scheduling command, and the second physical transmission resource sends the HARQ feedback information;

When the network entity receives the HARQ feedback information, the following options are available:

The network entity determines the second physical transmission resource according to the first scheduling command;

The network entity adopts the HARQ feedback TTI time parameter carried by the first scheduling command, and the second physical transmission resource receives the HARQ feedback information.

In the prior art, the HARQ feedback TTI time parameter used by the network entity in feeding back the HARQ is generally the same as the TTI time parameter used for data transmission or reception, and the flexibility is poor. If the time interval indicated by the TTI time parameter used by the network entity when transmitting data is small, the feedback may fail due to the UE power limitation; if the time interval indicated by the TTI time parameter used by the network entity when transmitting data is large Since the amount of information of the HARQ feedback is small, generally only 1 bit or 2 bits of information is used. If the UE power is not limited, when the HARQ feedback is performed using the same HARQ feedback TTI time parameter as the TTI time parameter, there is a waste of resources. To avoid the above situation, different HARQ feedback TTI time parameters are configured. In different scenarios, the network entity may send or receive HARQ feedback information by using different HARQ feedback TTI time parameters.

In the embodiment of the present invention, the feedback of the network entity for different data sent may conflict in time. For example, the target TTI time parameter used by the network entity to transmit data is 0.5 ms, and the HARQ feedback TTI time parameter is 1 ms. Assume that the first transmission starts at 0 ms, the first 0.5 ms transmission data is used, the feedback time interval is 2 ms, and feedback is performed at 0.5+2=2.5 ms. The HARQ feedback TTI used for feedback is 1 ms, that is, 2.5 ms to 3.5 ms. Perform HARQ feedback on the data sent for the first time; then, send data in the second 0.5ms, the corresponding feedback time is 1+2=3ms, and the HARQ feedback TTI used for feedback is 1ms, that is, between 3ms and 4ms. The second transmitted data is subjected to HARQ feedback. It can be seen that the HARQ feedback corresponding to the data transmitted in the first 0.5 ms overlaps with the HARQ feedback corresponding to the data transmitted in the second 0.5 ms, that is, in the first The time period of 3ms-3.5ms overlaps, which affects the decoding performance of the feedback.

In order to solve the impact on the decoding performance when the feedback conflicts, at this time, different feedback resources can be set for different data in which the conflict occurs.

Generally, the multiple relationship between the HARQ feedback TTI time parameter and the target TTI time parameter used in the HARQ feedback determines that several sets of feedback resources are needed: for example, the HARQ feedback TTI time parameter is 1 ms, and the target TTI time parameter is 0.5 ms, which is required. 2 sets of feedback resources; for example, the HARQ feedback TTI time parameter is 1 ms, and the target TTI time parameter is 0.1 ms, then 10 sets of feedback resources are needed.

In actual applications, data may fail to be sent. To improve transmission reliability, after the network entity sends data using the target TTI time parameter, the following operations are also included:

The network entity retransmits the data when it determines that the data transmission failed.

In the embodiment of the present invention, before the network entity retransmits the data, the following operations are also included:

The network entity determines a third mapping rule, where the third mapping rule includes a correspondence between the TTI time parameter and the round-trip time RTT time parameter;

The network entity determines an RTT time parameter corresponding to the target TTI time parameter from the third mapping rule.

For example, the TTI time parameter 0.1ms corresponds to the RTT time parameter 0.8ms, the TTI time parameter 0.2ms corresponds to the RTT time parameter 1.6ms, the TTI time parameter 0.5ms corresponds to the RTT time parameter 4ms, and the TTI time parameter 1ms and the RTT time parameter 8ms. Correspondingly, if the target TTI time parameter is 0.1 ms, it can be determined from the above correspondence that the RTT time parameter is 0.8 ms.

In the embodiment of the present invention, different RTT time parameters may correspond to the same TTI time parameter, and are not specifically limited herein.

In the embodiment of the present invention, when the network entity retransmits data, optionally, the following manner may be adopted:

The network entity retransmits the data according to the determined RTT time parameter.

In the embodiment of the present invention, before the network entity retransmits the data, the network entity further includes the following operations:

The network entity determines a first scheduling command that carries an RTT time parameter.

In the embodiment of the present invention, optionally, the first scheduling command indicates the third physical resource;

Optionally, the third physical resource and the first physical resource may be the same in the frequency domain.

At this time, when the network entity retransmits the data, it can be selected as follows:

The RTT time parameter carried by the network entity according to the first scheduling command, and the third physical resource retransmission data.

Further, before the network entity retransmits the data, the following operations are also included:

After the RTT time parameter is separated from the time interval for transmitting data, receiving a second scheduling command, where the second scheduling command indicates a fourth physical transmission resource;

When the network entity retransmits the data, it specifically:

Determining, according to the second scheduling command, a fourth physical transmission resource; and using the fourth physical transmission resource, retransmitting the data.

When the network entity retransmits the data, the method may be as follows:

The network entity traverses and descrambles the second scheduling command by using a scheduling identifier included in the first mapping rule;

The network entity successfully descrambles the TTI time parameter corresponding to the scheduling identifier of the second scheduling command as a retransmission TTI time parameter;

The network entity retransmits the data by using the retransmission TTI time parameter.

It should be noted in the embodiment of the present invention that when the network entity retransmits data by using the RTT time parameter, it means that the data is retransmitted when the time interval of the last transmission reaches the time interval indicated by the RTT time parameter, and may also refer to The data is retransmitted when the time interval from the last transmission is greater than the time interval indicated by the RTT time parameter.

For example, if the initial transmission time is T1 and the RTT time parameter is 8 ms, the data can be retransmitted at the time of T1+8 ms, and the data can be retransmitted at a time after T1+8 ms.

In the embodiment of the present invention, when the time interval indicated by the RTT time parameter is large, the HARQ retransmission delay is affected, and when the time interval indicated by the RTT time parameter is large, data retransmission may fail. When data is retransmitted, different RTT time parameters are used to improve the reliability of data transmission. At the same time, resource cost can be saved because it can avoid retransmission.

Further, before the network entity retransmits the data, the following operations are also included:

The network entity determines a fourth mapping rule, where the fourth mapping rule includes a correspondence between the TTI time parameter and the number of retransmissions;

The network entity determines, from the fourth mapping rule, a retransmission corresponding to the target TTI time parameter number;

The network entity determines the number of retransmissions for which the number of retransmissions of the data has been less than determined.

For example, the TTI time parameter 0.1 ms corresponds to the retransmission number 5, the TTI time parameter 0.2 ms corresponds to the retransmission number 3, the TTI time parameter 0.5 ms corresponds to the retransmission number 2, and the TI time parameter 1 ms corresponds to the retransmission number 1.

It should be noted that the number of retransmissions referred to herein refers to the maximum number of retransmissions. Therefore, the above operations can also be described as follows:

Determining a fourth mapping rule, where the fourth mapping rule includes a correspondence between a TTI time parameter and a maximum number of retransmissions; determining, from the fourth mapping rule, a maximum number of retransmissions corresponding to the target TTI time parameter; determining that the data has been retransmitted The number of times is less than the determined maximum number of retransmissions.

It should be noted that the number of retransmissions may also be the number of transmissions. In this case, the number of transmissions is the sum of the number of retransmissions and one.

In the embodiment of the present invention, optionally, when the TTI time parameter used when initially transmitting data and the TTI time parameter used when retransmitting data are different, the number of retransmissions may be corresponding to the TTI time parameter used in the initial transmission. It can also correspond to the TTI time parameter used in retransmission.

In the embodiment of the present invention, the number of different retransmissions may be the same as the same TTI time parameter, which is not specifically limited herein.

Further, before the network entity sends or receives data by using the target TTI time parameter, the following operations are also included:

The network entity determines a fifth mapping rule, where the fifth mapping rule includes a correspondence between the TTI time parameter and the bearer type;

The network entity determines, from the fifth mapping rule, a bearer type corresponding to the target TTI time parameter;

The network entity determines that the data sent or received belongs to the determined bearer type.

In the embodiment of the present invention, different bearer types may be associated with the same TTI time parameter, and are not specifically limited herein.

In the embodiment of the present invention, when determining the target TTI time parameter, the network entity only sends or receives The data of the bearer type corresponding to the target TTI time parameter is received, and data of other bearer types is not sent or received.

It should be noted that the bearer type is used in the description herein, but the bearer type may also be replaced by any one of a logical channel, a logical channel group, and an IP stream.

In the embodiment of the present invention, optionally, when the network entity determines the TTI configuration parameter, the first mapping rule, the second mapping rule, the third mapping rule, the fourth mapping rule, and the fifth mapping rule, the RRC message may be determined by using an RRC message. The RRC message may be a broadcast message or a dedicated message, such as an RRC connection reconfiguration message, by using a physical control message or a MAC (Media Access Control) layer control message. When the network entity is specifically determined, it may be determined by the same message, or may be determined by different messages, and is not specifically limited herein.

In the prior art, when the network entity sends or receives data, because the TTI time parameter is only one, the TTI time parameter used when transmitting or receiving data does not change according to the application scenario, and the flexibility is poor, and In the embodiment of the present invention, the TTI configuration parameter determined by the network entity indicates the TTI time parameter, and the TTI time parameter indicated by the TTI configuration parameter is used in the embodiment of the present invention. The number of times is greater than or equal to 2, and the time intervals indicated by different TTI time parameters are different; a TTI time parameter is determined from the TTI time parameter as the target TTI time parameter; the target TTI time parameter is used to transmit or receive data, so that the data is transmitted or received. When data is used, the target TTI time parameter can be selected as needed, which improves flexibility and can better adapt to changes in data size, changes in data QoS (Quality of Service) requirements, and channel changes, further improving data. Transmission performance, saving resource overhead.

Referring to FIG. 5, an embodiment of the present invention further provides a data communication method:

Step 500: The base station determines a TTI configuration parameter, where the TTI configuration parameter indicates that the time interval indicated by different TTI time parameters of the TTI time parameter indicated by the TTI time parameter TTI configuration parameter is different.

Step 510: The base station sends the TTI configuration parameter to the UE.

It can be understood that when the TTI configuration parameter is sent to the UE, the base station may only indicate part of the TTI time parameter, and other TTI time parameters are fixed in the protocol. For example, a TTI with a fixed TTI=1ms in the protocol. The time parameter is sent to the UE, and the TTI configuration parameter includes a TTI time parameter of 0.5 ms. In this case, the number of TTI time parameters indicated by the TTI configuration parameter may be one, but the total TTI time parameter is greater than or equal to 2. Of course, several other TTI time parameters can also be fixed in the protocol, and details will not be repeated here.

In the embodiment of the present invention, optionally, the TTI time parameter is in units of ms, or a time occupied by one OFDM symbol.

In the embodiment of the present invention, the method further includes:

The base station sends a first scheduling command to the UE.

In the embodiment of the present invention, optionally, the first scheduling command carries a TTI time parameter, or a bit identifier corresponding to the TTI time parameter;

The first scheduling command indicates the first physical transmission resource.

In the embodiment of the present invention, optionally, the first scheduling command carries a HARQ feedback TTI;

The first scheduling command indicates a second physical transmission resource.

In the embodiment of the present invention, optionally, the first scheduling command carries a round-trip time RTT time parameter;

The first scheduling command indicates a third physical resource.

In the embodiment of the present invention, the method further includes:

The base station sends a second scheduling command to the UE, where the second scheduling command indicates the fourth physical transmission resource.

In the embodiment of the present invention, the TTI configuration parameter sent by the base station indicates the number of the TTI time parameter, the number of the TTI time parameter is greater than or equal to 2, and the time interval indicated by the different TTI time parameter is different; after receiving the TTI configuration parameter, the terminal receives the TTI configuration parameter, Determining a TTI time parameter from the TTI time parameter as the target TTI time parameter; using the target TTI time parameter to send or receive data, so that when transmitting or receiving data, the target TTI time parameter can be selected as needed, thereby improving flexibility and It can better adapt to changes in data size, changes in data QoS requirements, and channel changes, further improving data transmission performance and saving resource overhead.

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

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

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

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

Although the preferred embodiment of the invention has been described, it will be apparent to those skilled in the < Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and the modifications and

It is apparent that those skilled in the art can make various modifications and variations to the embodiments of the invention without departing from the spirit and scope of the embodiments of the invention. Thus, it is intended that the present invention cover the modifications and modifications of the embodiments of the invention.

Claims (62)

  1. A network entity, comprising:
    a determining unit, configured to determine a transmission time interval TTI configuration parameter, where the TTI configuration parameter indicates a TTI time parameter, where the number of TTI time parameters indicated by the TTI configuration parameter is greater than or equal to 2, and the time indicated by different TTI time parameters Different intervals;
    The determining unit is further configured to: determine a TTI time parameter from the TTI time parameter as a target TTI time parameter;
    And a communication unit, configured to send or receive data by using the target TTI time parameter.
  2. The network entity according to claim 1, wherein the network entity is a base station or a user equipment UE.
  3. The network entity according to claim 1 or 2, wherein when the network entity is a UE, when the determining unit determines a TTI configuration parameter, specifically:
    Receiving the TTI configuration parameter sent by the network side device.
  4. The network entity according to any one of claims 1 to 3, wherein the TTI time parameter is in units of milliseconds ms, or in units of time occupied by one orthogonal frequency division multiplexing OFDM symbol, or The number of OFDM symbols is a unit.
  5. The network entity according to any one of claims 1 to 4, wherein the determining unit determines a TTI time parameter from the TTI time parameter as the target TTI time parameter, specifically:
    Determining a first mapping rule and a first scheduling command, where the first mapping rule includes a correspondence between the scheduling identifier and the TTI time parameter; determining the target TTI time according to the first scheduling command and the first mapping relationship parameter.
  6. The network entity according to claim 5, wherein the determining unit determines the target TTI time parameter according to the first scheduling command and the first mapping relationship, specifically:
    Using the scheduling identifier included in the first mapping rule to traverse the first scheduling command; and successfully descrambling the TTI time parameter corresponding to the scheduling identifier of the first scheduling command The target TTI time parameter.
  7. The network entity according to any one of claims 1 to 4, wherein the determining unit determines a TTI time parameter from the TTI time parameter as the target TTI time parameter, specifically:
    Determining a first scheduling command that carries a TTI time parameter, and using the TTI time parameter carried by the first scheduling command as the target TTI time parameter.
  8. The network entity according to any one of claims 1 to 4, wherein the determining unit determines a TTI time parameter from the TTI time parameter as the target TTI time parameter, specifically:
    Determining a first scheduling command that carries a bit identifier corresponding to the TTI time parameter; and using a TTI time parameter corresponding to the bit identifier as the target TTI time parameter.
  9. The network entity according to any one of claims 5-8, wherein the first scheduling command indicates a first physical transmission resource;
    When the communication unit sends or receives data by using the target TTI time parameter, specifically:
    Determining, according to the first scheduling command, a first physical transmission resource; transmitting or receiving the data by using the target TTI time parameter and the first physical transmission resource.
  10. The network entity according to any one of claims 1 to 9, wherein when the communication unit sends or receives data by using the target TTI time parameter, specifically:
    The data is transmitted or received using at least two of the target TTI time parameters.
  11. The network entity according to any one of claims 1 to 10, wherein the communication unit is further configured to:
    Send or receive hybrid automatic repeat request HARQ feedback information.
  12. The network entity according to claim 11, wherein the determining unit is further configured to:
    Determining a second mapping rule, where the second mapping rule includes a correspondence between a TTI time parameter and a HARQ feedback TTI time parameter; and determining a HARQ feedback TTI time parameter corresponding to the target TTI time parameter according to the second mapping rule.
  13. The network entity of claim 12 wherein said communication unit transmits or When receiving HARQ feedback information, it specifically:
    The HARQ feedback information is transmitted or received by using the determined HARQ feedback TTI time parameter.
  14. The network entity according to claim 11, wherein the determining unit is further configured to:
    A first scheduling command carrying the HARQ feedback TTI is determined.
  15. The network entity according to claim 14, wherein the first scheduling command indicates a second physical transmission resource;
    When the communication unit sends or receives the HARQ feedback information, it specifically:
    Determining, according to the first scheduling command, the second physical transmission resource; using the HARQ feedback TTI time parameter carried by the first scheduling command, and the second physical transmission resource, sending or receiving HARQ feedback information.
  16. The network entity according to any one of claims 1 to 15, wherein the communication unit is further configured to:
    When it is determined that the data transmission fails, the data is retransmitted.
  17. The network entity according to claim 16, wherein the determining unit is further configured to:
    Determining a third mapping rule, where the third mapping rule includes a correspondence between a TTI time parameter and a round trip time RTT time parameter; and determining, from the third mapping rule, an RTT time parameter corresponding to the target TTI time parameter .
  18. The network entity according to claim 17, wherein when the communication unit retransmits the data, it is specifically:
    The data is retransmitted based on the determined RTT time parameters.
  19. The network entity according to claim 16, wherein the determining unit is further configured to:
    A first scheduling command carrying the RTT time parameter is determined.
  20. The network entity according to claim 19, wherein the first scheduling command indicates a third physical resource;
    When the communication unit retransmits the data, it specifically:
    And retransmitting the data according to the RTT time parameter carried by the first scheduling command and the third physical resource.
  21. The network entity according to claim 17 or 19, wherein the determining unit is further configured to:
    After the RTT time parameter is separated from the time interval for transmitting data, receiving a second scheduling command, where the second scheduling command indicates a fourth physical transmission resource;
    When the communication unit retransmits the data, it specifically:
    Determining, according to the second scheduling command, a fourth physical transmission resource; and using the fourth physical transmission resource, retransmitting the data.
  22. The network entity according to claim 21, wherein when the communication unit retransmits the data, it is specifically:
    Using the scheduling identifier included in the first mapping rule to traverse the second scheduling command; the TTI time parameter corresponding to the scheduling identifier of the second scheduling command is successfully descrambled as the retransmission TTI time parameter Retransmitting the data using the retransmitted TTI time parameter.
  23. The network entity according to any one of claims 16 to 22, wherein the determining unit is further configured to:
    Determining a fourth mapping rule, where the fourth mapping rule includes a correspondence between a TTI time parameter and a number of retransmissions; determining, from the fourth mapping rule, a number of retransmissions corresponding to the target TTI time parameter; The number of times the data has been retransmitted is less than the determined number of retransmissions.
  24. The network entity according to any one of claims 1 to 23, wherein the determining unit is further configured to:
    Determining a fifth mapping rule, where the fifth mapping rule includes a correspondence between a TTI time parameter and a bearer type; determining, from the fifth mapping rule, a bearer type corresponding to the target TTI time parameter; determining the sending Or the received data belongs to the determined bearer type.
  25. A base station, comprising:
    a determining unit, configured to determine a transmission time interval TTI configuration parameter, where the TTI configuration parameter indicates a TTI time parameter, where the number of TTI time parameters indicated by the TTI configuration parameter is greater than or equal to 2, and the time indicated by different TTI time parameters Different intervals;
    And a sending unit, configured to send the TTI configuration parameter to the user equipment UE.
  26. The base station according to claim 25, wherein the TTI time parameter is in units of milliseconds ms, or is in units of time occupied by one orthogonal frequency division multiplexing OFDM symbol, or the number of OFDM symbols is unit.
  27. The base station according to claim 25 or 26, wherein the transmitting unit is further configured to:
    Sending a first scheduling command to the UE.
  28. The base station according to claim 27, wherein the first scheduling command carries a TTI time parameter or a bit identifier corresponding to a TTI time parameter;
    The first scheduling command indicates a first physical transmission resource.
  29. The base station according to claim 27 or 28, wherein the first scheduling command carries a HARQ feedback TTI;
    The first scheduling command indicates a second physical transmission resource.
  30. The base station according to any one of claims 27 to 29, wherein the first scheduling command carries a round trip time RTT time parameter;
    The first scheduling command indicates a third physical resource.
  31. The base station according to any one of claims 25 to 30, wherein the transmitting unit is further configured to:
    Sending a second scheduling command to the UE, where the second scheduling command indicates a fourth physical transmission resource.
  32. A method of data communication, comprising:
    The network entity determines a transmission time interval TTI configuration parameter, where the TTI configuration parameter indicates a TTI time parameter, the number of TTI time parameters indicated by the TTI configuration parameter is greater than or equal to 2, and different time intervals indicated by different TTI time parameters are different;
    Determining, by the network entity, a TTI time parameter from the TTI time parameter as a target TTI time parameter;
    The network entity sends or receives data using the target TTI time parameter.
  33. The method of claim 32, wherein the network entity is a base station or User equipment UE.
  34. The method according to claim 32 or 33, wherein when the network entity is a UE, the network entity determines TTI configuration parameters, including:
    The network entity receives the TTI configuration parameter sent by the network side device.
  35. The method according to any one of claims 32-34, wherein the TTI time parameter is in units of milliseconds ms, or in units of time occupied by one orthogonal frequency division multiplexing OFDM symbol, or in OFDM The number of symbols is a unit.
  36. The method according to any one of claims 32 to 35, wherein the network entity determines a TTI time parameter from the TTI time parameter as the target TTI time parameter, including:
    Determining, by the network entity, a first mapping rule and a first scheduling command, where the first mapping rule includes a correspondence between a scheduling identifier and the TTI time parameter;
    The network entity determines the target TTI time parameter according to the first scheduling command and the first mapping relationship.
  37. The method of claim 36, wherein the determining, by the network entity, the target TTI time parameter according to the first scheduling command and the first mapping relationship comprises:
    The network entity traverses and descrambles the first scheduling command by using a scheduling identifier included in the first mapping rule;
    The network entity will successfully descramble the TTI time parameter corresponding to the scheduling identifier of the first scheduling command as the target TTI time parameter.
  38. The method according to any one of claims 32 to 35, wherein the network entity determines a TTI time parameter from the TTI time parameter as the target TTI time parameter, including:
    Determining, by the network entity, a first scheduling command that carries a TTI time parameter;
    The network entity uses the TTI time parameter carried by the first scheduling command as the target TTI time parameter.
  39. The method according to any one of claims 32 to 35, wherein the network entity determines a TTI time parameter from the TTI time parameter as the target TTI time parameter, including:
    Determining, by the network entity, a first scheduled life carrying a bit identifier corresponding to a TTI time parameter make;
    The network entity uses a TTI time parameter corresponding to the bit identifier as the target TTI time parameter.
  40. The method according to any one of claims 36 to 39, wherein the first scheduling command indicates a first physical transmission resource;
    The network entity sends or receives data by using the target TTI time parameter, including:
    Determining, by the network entity, the first physical transmission resource according to the first scheduling command;
    The network entity sends or receives the data by using the target TTI time parameter and the first physical transmission resource.
  41. The method according to any one of claims 32 to 40, wherein the network entity sends or receives data by using the target TTI time parameter, including:
    The network entity transmits or receives the data using at least two of the target TTI time parameters.
  42. The method according to any one of claims 32 to 41, wherein after the network entity receives the data by using the target TTI time parameter, the method further includes:
    Transmitting, by the network entity, hybrid automatic repeat request HARQ feedback information;
    After the network entity sends the data by using the target TTI time parameter, the method further includes:
    The network entity receives HARQ feedback information.
  43. The method of claim 42, wherein before the network entity sends or receives the HARQ feedback information, the method further includes:
    Determining, by the network entity, a second mapping rule, where the second mapping rule includes a correspondence between a TTI time parameter and a HARQ feedback TTI time parameter;
    And determining, by the network entity, a HARQ feedback TTI time parameter corresponding to the target TTI time parameter according to the second mapping rule.
  44. The method of claim 43, wherein the transmitting, by the network entity, the HARQ feedback information comprises:
    The network entity sends the HARQ feedback by using the determined HARQ feedback TTI time parameter. information;
    The network entity receives the HARQ feedback information, including:
    The network entity receives the HARQ feedback information by using the determined HARQ feedback TTI time parameter.
  45. The method of claim 42, wherein before the network entity sends or receives the HARQ feedback information, the method further includes:
    The network entity determines a first scheduling command that carries a HARQ feedback TTI.
  46. The method of claim 45, wherein the first scheduling command indicates a second physical transmission resource;
    The network entity sends the HARQ feedback information, including:
    Determining, by the network entity, the second physical transmission resource according to the first scheduling command;
    The network entity adopts a HARQ feedback TTI time parameter carried by the first scheduling command, and the second physical transmission resource sends HARQ feedback information;
    The network entity receives the HARQ feedback information, including:
    Determining, by the network entity, the second physical transmission resource according to the first scheduling command;
    The network entity adopts a HARQ feedback TTI time parameter carried by the first scheduling command, and the second physical transmission resource receives HARQ feedback information.
  47. The method according to any one of claims 32 to 46, wherein after the network entity sends or receives data by using the target TTI time parameter, the method further includes:
    The network entity retransmits the data when the data transmission fails.
  48. The method of claim 47, wherein before the retransmitting the data by the network entity, the method further comprises:
    Determining, by the network entity, a third mapping rule, where the third mapping rule includes a correspondence between a TTI time parameter and a round trip time RTT time parameter;
    The network entity determines, from the third mapping rule, an RTT time parameter corresponding to the target TTI time parameter.
  49. The method of claim 48, wherein said network entity retransmits said number According to, including:
    The network entity retransmits the data according to the determined RTT time parameter.
  50. The method of claim 47, wherein before the retransmitting the data by the network entity, the method further comprises:
    The network entity determines a first scheduling command that carries an RTT time parameter.
  51. The method of claim 50, wherein the first scheduling command indicates a third physical resource;
    Retransmitting the data by the network entity, including:
    The network entity retransmits the data according to the RTT time parameter carried by the first scheduling command and the third physical resource.
  52. The method of claim 47, wherein before the retransmitting the data by the network entity, the method further comprises:
    After the RTT time parameter is separated from the time interval for transmitting data, receiving a second scheduling command, where the second scheduling command indicates a fourth physical transmission resource;
    When the network entity retransmits the data, it specifically:
    Determining, according to the second scheduling command, a fourth physical transmission resource; and using the fourth physical transmission resource, retransmitting the data.
  53. The method of claim 52, wherein the retransmitting the data by the network entity comprises:
    The network entity traverses and descrambles the second scheduling command by using a scheduling identifier included in the first mapping rule;
    The network entity successfully descrambles the TTI time parameter corresponding to the scheduling identifier of the second scheduling command as a retransmission TTI time parameter;
    The network entity retransmits the data by using the retransmission TTI time parameter.
  54. The method according to any one of claims 47-53, wherein before the retransmitting the data by the network entity, the method further comprises:
    The network entity determines a fourth mapping rule, where the fourth mapping rule includes a TTI time parameter Correspondence with the number of retransmissions;
    Determining, by the network entity, the number of retransmissions corresponding to the target TTI time parameter from the fourth mapping rule;
    The network entity determines that the number of retransmissions for the data has been less than the determined number of retransmissions.
  55. The method according to any one of claims 32-54, wherein before the network entity sends or receives data by using the target TTI time parameter, the method further includes:
    Determining, by the network entity, a fifth mapping rule, where the fifth mapping rule includes a correspondence between a TTI time parameter and a bearer type;
    Determining, by the network entity, a bearer type corresponding to the target TTI time parameter from the fifth mapping rule;
    The network entity determines that the transmitted or received data belongs to the determined bearer type.
  56. A method of data communication, comprising:
    The base station determines a transmission time interval TTI configuration parameter, where the TTI configuration parameter indicates a TTI time parameter, the number of TTI time parameters indicated by the TTI configuration parameter is greater than or equal to 2, and different time intervals indicated by different TTI time parameters are different;
    The base station sends the TTI configuration parameter to the user equipment UE.
  57. The method according to claim 56, wherein the TTI time parameter is in units of milliseconds ms, or in units of time occupied by one orthogonal frequency division multiplexing OFDM symbol, or the number of OFDM symbols is unit.
  58. The method of claim 56 or 55, wherein the method further comprises:
    The base station sends a first scheduling command to the UE.
  59. The method according to claim 58, wherein the first scheduling command carries a TTI time parameter or a bit identifier corresponding to the TTI time parameter;
    The first scheduling command indicates a first physical transmission resource.
  60. The method according to claim 58 or 59, wherein the first scheduling command carries a HARQ feedback TTI;
    The first scheduling command indicates a second physical transmission resource.
  61. The method according to any one of claims 58-60, wherein the first scheduling command carries a round trip time RTT time parameter;
    The first scheduling command indicates a third physical resource.
  62. The method of any of claims 56-61, wherein the method further comprises:
    The base station sends a second scheduling command to the UE, where the second scheduling command indicates a fourth physical transmission resource.
PCT/CN2015/085309 2015-07-28 2015-07-28 Data communication method and apparatus WO2017015855A1 (en)

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