WO2018171520A1 - Data transmission method, terminal device, and access network device - Google Patents

Abstract

A data transmission method, a terminal device, an access network device, and a system. The method comprises: an access network device sends first control information to a terminal device on a first time unit of a first carrier; the access network device determines a second time unit of a second carrier according to the first time unit, a first parameter and a first time length, the time length of the first time unit being different from that of the second time unit; and the access network device transmits data with the terminal device on the second time unit of the second carrier. Accordingly, the access network device and the terminal device can transmit control information and data when the length of the time unit of the first carrier and the length of the time unit of the second carrier are different, thereby improving the flexibility of cross-carrier scheduling.

Description

Data transmission method, terminal device and access network device

This application claims the priority of the Chinese patent application filed on March 24, 2017, the Chinese Patent Office, the application number is 201710183304.X, and the application name is "a data transmission method, terminal equipment and access network equipment". The content is incorporated herein by reference.

Technical field

Embodiments of the present application relate to communication systems, and in particular, to a data transmission method, a terminal device, and an access network device.

Background technique

In the Frequency Division Duplex (FDD) system, cross-carrier scheduling is a technique for controlling information and data transmission on different carriers. For example, in the above-mentioned line data transmission, the access network device sends control information to the terminal device on the first time unit n (for example, subframe n) of the scheduling carrier, and the terminal device will use the control information according to the control information in the second time of the scheduled carrier. Transmitting data on the unit n+k (subframe n+k), wherein the parameter k may be a preset parameter or sent by the access network device and carried in the control information, and the time unit length of the scheduled carrier and the scheduled carrier The time unit length is the same, that is, the scheduling carrier and the scheduled carrier have the same granularity in the time domain. Therefore, according to the method of the prior art, the control information is sent on the first time unit n of the scheduling carrier, and the data will be The second time unit n+k of the scheduled carrier is sent, but when the time length of the scheduling carrier and the scheduled carrier are different, that is, when the scheduling carrier and the scheduled carrier have different granularity in the time domain, the access network device or The terminal device cannot determine the specific location of the second time unit n+k of the scheduled carrier transmitting the data, and the data cannot be transmitted. When the time unit length of the scheduled carrier is different from the time unit length of the scheduled carrier, the existing cross-carrier scheduling will not be possible.

Therefore, there is a need in the industry for a method of controlling information and data transmission between carriers having different time unit lengths.

Summary of the invention

Embodiments of the present application provide a data transmission method, a terminal device, and an access network device, which are capable of transmitting control information and data between carriers having different time unit lengths.

In a first aspect, the embodiment of the present application provides a data transmission method, including: an access network device sends first control information to a terminal device in a first time unit of a first carrier; Determining, by the first time parameter, the first parameter and the first duration, a second time unit of the second carrier, where the first parameter is a preset parameter or the first parameter is a parameter included in the first control information, The first parameter is 0 or a positive integer, and the first duration is a time length of a first time unit of the first carrier or a time length of a second time unit of the second carrier, the first time The time length of the unit is different from the time length of the second time unit; the access network device performs data transmission with the terminal device on a second time unit of the second carrier.

In a possible design, the access network device determines the second time unit of the second carrier according to the first time unit, the first parameter, and the first duration, where the access network device determines the The first time length of the first time unit is the first time, and the first time length is the first parameter multiplied by the first time length; the access network device is according to the first time A second time unit of the second carrier is determined at a time.

In a possible design, the determining, by the access network device, the second time unit of the second carrier according to the first moment, the determining, by the access network device, determining the second carrier according to the first moment a third time unit, wherein the third time unit is a time unit corresponding to the second time on the second carrier, and the second time unit is a next time unit of the third time unit.

In a possible design, the second time unit is a time unit corresponding to the second time on the second carrier.

In a possible design, the first control information further includes a first offset, and the access network device determines, according to the first moment, a second time unit of the second carrier, including: The access network device determines, according to the first time, a third time unit of the second carrier, where the third time unit is a time unit corresponding to the second time on the second carrier; the access network device Determining that the third time unit of the second carrier is backward offset by the first offset into a second time unit of the second carrier.

In a possible design, the first control information further includes a first offset, and the access network device determines that the third time unit of the second carrier is backward offset by the first offset a fourth time unit of the second carrier; the second time unit being a next time unit of the fourth time unit.

In a possible design, the first time unit includes at least one of a subframe, a time slot, a minislot, and a symbol; the second time unit includes a subframe, a time slot, a minislot, and a symbol. At least one of the third time units includes at least one of a subframe, a time slot, a minislot, and a symbol; the fourth time unit includes at least one of a subframe, a time slot, a minislot, and a symbol.

In a second aspect, an embodiment of the present application provides an access network device, where the access network device includes a sending unit, a determining unit, and a transmitting unit. a sending unit, configured to send first control information to the terminal device in a first time unit of the first carrier, and a determining unit, configured to determine, according to the first time unit, the first parameter, and the first duration, a second second carrier a time unit, the first parameter is a preset parameter or the first parameter is a parameter included in the first control information, the first parameter is 0 or a positive integer, and the first duration is a Determining a time length of the first time unit of the first carrier or a time length of the second time unit of the second carrier, the time length of the first time unit being different from the time length of the second time unit; And performing data transmission with the terminal device on a second time unit of the second carrier.

In a possible design, the determining unit is configured to determine a second time unit of the second carrier according to the first time unit, the first parameter, and the first duration, the determining unit determining the The first time length of the end time of the time unit is the first time, the first time length is the first parameter multiplied by the first time length; the determining unit is determined according to the first time a second time unit of the second carrier.

In a possible design, the determining unit determines the second time unit of the second carrier according to the first moment, where the determining unit determines the third time of the second carrier according to the first moment a unit, the third time unit is a time unit corresponding to the second time on the second carrier, and the second time unit is a next time unit of the third time unit.

In a possible design, the second time unit is a time unit corresponding to the second time on the second carrier.

In a possible design, the first control information further includes a first offset, and the determining unit determines the second time unit of the second carrier according to the first moment, including: the determining unit Determining, according to the first time, a third time unit of the second carrier, where the third time unit is a time unit corresponding to the second time on the second carrier; the determining unit determining the second carrier The third time unit is backward offset by the first offset into a second time unit of the second carrier.

In a possible design, the first control information further includes a first offset, and the determining unit determines that the third time unit of the second carrier is backward offset by the first offset a fourth time unit of the second carrier; the second time unit being the next time unit of the fourth time unit.

In a possible design, the first time unit includes at least one of a subframe, a time slot, a minislot, and a symbol; the second time unit includes a subframe, a time slot, a minislot, and a symbol. At least one of the third time units includes at least one of a subframe, a time slot, a minislot, and a symbol; the fourth time unit includes at least one of a subframe, a time slot, a minislot, and a symbol.

In one possible design, the processing unit may be a processor, and the sending unit may be a transmitter or a transceiver, and the transceiver unit may be a transceiver.

In a third aspect, the embodiment of the present application provides a data transmission method, including: receiving, by a terminal device, first control information from an access network device in a first time unit of a first carrier; the terminal device according to the first time The unit, the first parameter, and the first duration determine a second time unit of the second carrier, where the first parameter is a preset parameter or the first parameter is a parameter included in the first control information, The first parameter is 0 or a positive integer, where the first duration is the length of time of the first time unit of the first carrier or the length of time of the second time unit of the second carrier, where the first time unit The length of time is different from the length of time of the second time unit; the terminal device performs data transmission with the access network device or other terminal device on a second time unit of the second carrier.

In a possible design, the determining, by the terminal device, the second time unit of the second carrier according to the first time unit, the first parameter, and the first duration includes: determining, by the terminal device, the first time unit The first time length of the end time is the first time, the first time length is the first parameter multiplied by the first time length; the terminal device determines the second time according to the first time The second time unit of the carrier.

In a possible design, the determining, by the terminal device, the second time unit of the second carrier according to the first moment, includes: determining, by the terminal device, a third time unit of the second carrier according to the first moment The third time unit is a time unit corresponding to the second time on the second carrier, and the second time unit is a next time unit of the third time unit.

In one possible design, the second time unit is a time unit corresponding to the second time on the second carrier.

In a possible design, the first control information further includes a first offset, and the determining, by the terminal device, the second time unit of the second carrier according to the first moment, includes: the terminal device according to Determining, by the first time, a third time unit of the second carrier, where the third time unit is a time unit corresponding to the second time on the second carrier; and determining, by the terminal device, the second carrier The third time unit is backward offset by the first offset into a second time unit of the second carrier.

In a possible design, the first control information further includes a first offset, and the terminal device determines that the third time unit of the second carrier is backward offset by the first offset into a fourth time unit of the second carrier; the second time unit being the next time unit of the fourth time unit.

In a possible design, the first control information further includes a first interval, and the method further includes: the terminal device is apart from the second time unit by at least one of the first Data transmission with other terminal devices on the time unit of the interval.

In one possible design, the first time unit includes at least one of a subframe, a time slot, a minislot, and a symbol; the second time unit includes a subframe, a time slot, a minislot, and a symbol At least one; the third time unit includes at least one of a subframe, a time slot, a minislot, and a symbol; the fourth time unit includes at least one of a subframe, a time slot, a minislot, and a symbol.

In a fourth aspect, an embodiment of the present application provides a terminal device, where the terminal device includes a receiving unit, a determining unit, and a transmitting unit. a receiving unit, configured to receive first control information from the access network device in a first time unit of the first carrier, and a determining unit, configured to determine the second carrier according to the first time unit, the first parameter, and the first duration The second time unit, the first parameter is a preset parameter or the first parameter is a parameter included in the first control information, the first parameter is 0 or a positive integer, the first time length The length of time of the first time unit of the first carrier or the length of time of the second time unit of the second carrier, the length of time of the first time unit is different from the time length of the second time unit; And a transmitting unit, configured to perform data transmission with the access network device or other terminal device on a second time unit of the second carrier.

In a possible design, the determining unit is configured to determine a second time unit of the second carrier according to the first time unit, the first parameter, and the first duration, the determining unit determining the first The first time length of the end time of the time unit is the first time, the first time length is the first parameter multiplied by the first time length; the determining unit determines the location according to the first time A second time unit of the second carrier.

In a possible design, the determining unit determines the second time unit of the second carrier according to the first moment, the determining unit determining, according to the first moment, a third time unit of the second carrier The third time unit is a time unit corresponding to the second time on the second carrier, and the second time unit is a next time unit of the third time unit.

In one possible design, the second time unit is a time unit corresponding to the second time on the second carrier.

In a possible design, the first control information further includes a first offset, and the determining unit determines the second time unit of the second carrier according to the first moment, where the determining unit is configured according to Determining, by the first time, a third time unit of the second carrier, where the third time unit is a time unit corresponding to the second time on the second carrier; the determining unit determining the second carrier The third time unit is backward offset by the first offset into a second time unit of the second carrier.

In a possible design, the first control information further includes a first offset, and the determining unit determines that the third time unit of the second carrier is backward offset by the first offset into a fourth time unit of the second carrier; the second time unit being the next time unit of the fourth time unit.

In a possible design, the first control information further includes a first interval, and the transmitting unit is further configured to: at least one of the first intervals of the second carrier that is spaced apart from the second time unit Data transmission with other terminal devices on the time unit.

In one possible design, the first time unit includes at least one of a subframe, a time slot, a minislot, and a symbol; the second time unit includes a subframe, a time slot, a minislot, and a symbol At least one; the third time unit includes at least one of a subframe, a time slot, a minislot, and a symbol; the fourth time unit includes at least one of a subframe, a time slot, a minislot, and a symbol.

In one possible design, the processing unit may be a processor, and the receiving unit may be a receiver or a transceiver, and the transceiver unit may be a transceiver.

In a fifth aspect, an embodiment of the present application provides a computer storage medium for storing computer software instructions used by the access network device, including a program designed to perform the foregoing aspects.

In a sixth aspect, an embodiment of the present application provides a computer storage medium for storing computer software instructions used by the terminal device, which includes a program designed to perform the above aspects.

The first network unit sends the first control information to the terminal device in the first time unit of the first carrier, where the access network device determines the second according to the first time unit, the first parameter, and the first duration. a second time unit of the carrier, where the first duration is the length of time of the first time unit of the first carrier or the length of time of the second time unit of the second carrier, and the length of time of the first time unit is The time length of the second time unit is different, and the access network device and the terminal device can complete the transmission of control information and data when the time units of the first carrier and the second carrier are different, and improve cross-carrier scheduling. flexibility.

DRAWINGS

FIG. 1 is a schematic architectural diagram of a system in accordance with an embodiment of the present application.

2 is a schematic diagram of cross-carrier scheduling according to an embodiment of the present application.

FIG. 3 is a data transmission method according to an embodiment of the present application.

FIG. 4 is an access network device according to an embodiment of the present application.

FIG. 5 is another access network device according to an embodiment of the present application.

FIG. 6 is a terminal device according to an embodiment of the present application.

FIG. 7 is another terminal device according to an embodiment of the present application.

FIG. 8 is a cross-carrier data transmission method according to an embodiment of the present application.

FIG. 9 is another cross-carrier data transmission method according to an embodiment of the present application.

detailed description

As shown in FIG. 1, in the downlink data transmission, the access network device sends control information to the terminal device 1 on the scheduling carrier, and then the access network device sends data to the terminal device 1 on the scheduled carrier according to the control information, and The terminal device 1 also receives the data from the access network device on the scheduled carrier based on the control information. In the uplink data transmission, the access network device sends control information to the terminal device 1 on the scheduling carrier, and then the terminal device 1 transmits data to the access network on the scheduled carrier according to the control information, and the access network device also This control information receives the data from the terminal device 1 on the scheduled carrier. In side-by-side data transmission, ie, vehicle to vehicle communication (Vehicle to X, V2X) or vehicle to vehicle (V2V), the access network device transmits control information to the terminal device 1 on the scheduling carrier, and then The terminal device 1 transmits data to the terminal device 2 on the scheduled carrier according to the control information, and the terminal device 2 performs blind detection on the data transmitted by the terminal device 1 to receive the data. The time unit length of the scheduled carrier is different from the time unit length of the scheduled carrier, as shown in FIG. 2 .

In FIG. 2, the time unit of the scheduled carrier or the scheduled carrier may be a subframe, a time slot, a minislot or a symbol. The symbol may be a fixed length of time, or may be a length of time of a plurality of fixed time lengths, and the plurality of fixed time lengths may be used as an alternative to the length of time of the symbol. The length of the subframe is a predefined length of time, for example, 1 ms. A time slot includes a number of symbols, for example, may include 7 symbols or 14 symbols. The microslot contains a symbol of at least one symbol and at most one symbol less than the number of symbols included in the slot.

The access network device involved in the present application is a device deployed in a wireless access network to provide a wireless communication function for a terminal device. The access network device may include various forms of base stations (BSs), such as macro base stations or micro base stations, relay stations or access points, and the like. In a system using different radio access technologies, the name of the device having the function of the access network device may be different, for example, it is an access network device in the fifth generation 5G network, and in the LTE network, It is an evolved Node B (referred to as an eNB or an eNodeB), and is called a Node B or the like in a third-generation 3G network, or a Road Side Unit (RSU) in V2V communication. For convenience of description, in the present application, the above devices for providing wireless communication functions for terminal devices are collectively referred to as access network devices.

The terminal device referred to in the present application may include various handheld devices having wireless communication functions, such as an in-vehicle device, a wearable device, a computing device, or other processing device connected to a wireless modem, a mobile station (MS), Terminal or User Equipment (UE), etc. For convenience of description, in the present application, the above-mentioned devices are collectively referred to as terminal devices.

Embodiments of the present application are described in more detail below with reference to specific examples.

FIG. 3 is a data transmission method and system according to an embodiment of the present application, and the specific steps are as follows:

Step 31: The access network device sends first control information to the terminal device in the first time unit of the first carrier, and the terminal device receives the first control information from the access network device in the first time unit of the first carrier.

In an optional embodiment, the first carrier is a scheduling carrier, and the first control information is Downlink Control Information (DCI), and the downlink control information may include a time-frequency domain resource for transmitting data.

Step 32: The access network device determines a second time unit of the second carrier according to the first time unit, the first parameter, and the first duration.

Step 33: The terminal device determines a second time unit of the second carrier according to the first time unit, the first parameter, and the first duration.

In step 32 or step 33, the first parameter is a preset parameter or the first parameter is a parameter included in the first control information, and the first parameter is 0 or a positive integer, The first duration is the length of time of the first time unit of the first carrier or the length of time of the second time unit of the second carrier, the length of time of the first time unit and the time of the second time unit Different lengths.

In an optional embodiment, the order of steps 32 and 33 is not limited.

Step 34 (1), the access network device performs data transmission with the terminal device on a second time unit of the second carrier. Optionally, step 34(1) may be downlink data transmission, that is, the access network device sends data to the terminal device on a second time unit of the second carrier, where the terminal device is in the second carrier Receiving data from the access network device on a second time unit; or for uplink data transmission, that is, the access network device receives data from the terminal device on a second time unit of the second carrier, where the terminal device is Data is transmitted to the access network device on a second time unit of the second carrier.

Step 34 (2), the terminal device performs data transmission with other terminal devices on the second time unit of the second carrier. Optionally, in the V2X communication, the terminal device sends data to the other terminal device on the second time unit of the second carrier, and the other terminal device may receive the data by means of blind detection.

In an optional embodiment, in step 32 or step 33, the access network device or the terminal device determines a second time unit of the second carrier according to the first time unit, the first parameter, and the first duration. The method includes: the access network device or the terminal device determines that the first time length of the first time unit is the first time, and the first time length is the first parameter multiplied by the The first time. The access network device or the terminal device determines a second time unit of the second carrier according to the first moment. Optionally, the second time unit is a time unit corresponding to the second time on the second carrier.

In an optional embodiment, the determining, by the access network device or the terminal device, the second time unit of the second carrier according to the first moment, the: the access network device or the terminal device according to the first moment Determining a third time unit of the second carrier, where the third time unit is a time unit corresponding to the second time on the second carrier, and the second time unit is a next time of the third time unit Time unit.

In an optional embodiment, the first control information further includes a first offset, and the access network device determines, according to the first time, the second time unit of the second carrier, including: The access network device determines, according to the first time, a third time unit of the second carrier, where the third time unit is a time unit corresponding to the second time on the second carrier; the access network device Determining that the third time unit of the second carrier is backward offset by the first offset into a second time unit of the second carrier.

In an optional embodiment, the first control information further includes a first offset, and the access network device or the terminal device determines that the third time unit of the second carrier is backward offset by the first The offset is a fourth time unit of the second carrier, and the second time unit is a next time unit of the fourth time unit.

In an optional embodiment, the first control information further includes a first offset, and the access network device or the terminal device determines the second carrier according to the first time unit, the first parameter, and the first duration. The second time unit includes: the access network device or the terminal device determines that the first time duration of the first time unit is the first time, and the first time length is the first time Multiplying a parameter by the first time length; the access network device or the terminal device shifting the first time back by the first offset to obtain a second time; the access network device or terminal The device determines a second time unit of the second carrier according to the second moment.

In an optional embodiment, the first control information further includes a first interval, and the terminal device is at a time unit of the second carrier that is separated from the second time unit by at least one of the first intervals. Data transmission with other terminal devices.

In an optional embodiment, the first time unit includes at least one of a subframe, a time slot, a minislot, and a symbol, where the second time unit includes a subframe, a time slot, a minislot, and a symbol. At least one of the third time units includes at least one of a subframe, a time slot, a minislot, and a symbol, the fourth time unit including at least one of a subframe, a time slot, a minislot, and a symbol.

According to the embodiment of the present application, the access network device or the terminal device determines the second time unit of the second carrier according to the first time unit, the first parameter, and the first duration of the first carrier, where the first duration is the first carrier a time length of the first time unit or a time length of the second time unit of the second carrier, the time length of the first time unit being different from the time length of the second time unit, thereby, the access network device or the terminal The device may perform cross-carrier scheduling when the time units of the first carrier and the second carrier are different, and the access network device and the terminal device may complete control information and data transmission when the time units of the first carrier and the second carrier are different in length. Improve the flexibility of cross-carrier scheduling.

FIG. 4 shows a possible schematic diagram of an access network device for performing the method in the embodiment of FIG. 3, the access network device comprising a transmitting unit 401, a determining unit 402 and a transmitting unit 403.

The sending unit 401 is configured to send the first control information to the terminal device in the first time unit of the first carrier.

a determining unit 402, configured to determine, according to the first time unit, the first parameter, and the first duration, a second time unit of the second carrier, where the first parameter is a preset parameter or the first parameter is included in a parameter in the first control information, where the first parameter is 0 or a positive integer, the first duration is a time length of a first time unit of the first carrier or a second time of the second carrier The length of time of the unit, the length of time of the first time unit being different from the length of time of the second time unit.

The transmitting unit 403 is configured to perform data transmission with the terminal device on a second time unit of the second carrier. Optionally, for the downlink data transmission, the transmission unit 403 may be replaced by the sending unit 401, that is, the sending unit 401 is further configured to send data to the terminal device on the second time unit of the second carrier. For uplink data transmission, the transmission unit 403 may be replaced by a receiving unit, that is, the receiving unit is configured to receive data from the terminal device on a second time unit of the second carrier.

In an optional embodiment, the determining unit 402 is configured to determine, according to the first time unit, the first parameter, and the first duration, a second time unit of the second carrier, where the determining unit 402 determines The first time length of the first time unit is the first time, and the first time length is the first parameter multiplied by the first time length; the determining unit 402 is according to the first time A second time unit of the second carrier is determined at a time.

In an optional embodiment, the determining unit 402 determines the second time unit of the second carrier according to the first moment, where the determining unit 402 determines the second carrier according to the first moment. a third time unit, wherein the third time unit is a time unit corresponding to the second time on the second carrier, and the second time unit is a next time unit of the third time unit.

In an optional embodiment, the second time unit is a time unit corresponding to the second time on the second carrier.

In an optional embodiment, the first control information further includes a first offset, and the determining unit 402 determines the second time unit of the second carrier according to the first moment, including: determining The unit 402 determines a third time unit of the second carrier according to the first time, where the third time unit is a time unit corresponding to the second time on the second carrier; the determining unit 402 determines the The third time unit of the second carrier is backward offset by the first offset into a second time unit of the second carrier.

In an optional embodiment, the first control information further includes a first offset, and the determining unit 402 determines that the third time unit of the second carrier is backward offset by the first offset a fourth time unit of the second carrier; the second time unit being a next time unit of the fourth time unit.

In an optional embodiment, the first time unit includes at least one of a subframe, a time slot, a minislot, and a symbol; the second time unit includes a subframe, a time slot, a minislot, and a symbol. At least one of the third time units includes at least one of a subframe, a time slot, a minislot, and a symbol; the fourth time unit includes at least one of a subframe, a time slot, a minislot, and a symbol.

In an optional embodiment, the sending unit 401 may be a transmitter 501, the transmitter 501 may be replaced by a transceiver 503, the determining unit 402 may be a processor 502, and the receiving unit may be a receiver The receiver may be replaced by a transceiver 503, and the transmission unit 403 may be a transceiver 503. Meanwhile, the terminal device may further include a memory 504, where the memory 504 is used to store program codes and data of the terminal device. Specifically, as shown in FIG. 5, the access network device includes a transmitter 501, a processor 502, a transceiver 503, and a memory 504.

According to the embodiment of the present application, the access network device determines the second time unit of the second carrier according to the first time unit of the first carrier, the first parameter, and the first duration, where the first duration is the first time of the first carrier The length of time of the unit or the length of time of the second time unit of the second carrier, the length of time of the first time unit is different from the time length of the second time unit, whereby the access network device can be on the first carrier Cross-carrier scheduling is completed when the time unit length of the second carrier is different, and the access network device and the terminal device can complete control information and data transmission when the time units of the first carrier and the second carrier are different, and the cross-carrier scheduling is improved. Flexibility.

FIG. 6 shows a possible structural diagram of a terminal device for performing the method in the embodiment of FIG. 3, the access network device comprising a receiving unit 601, a determining unit 602 and a transmitting unit 603.

The receiving unit 601 is configured to receive, by using the first time unit of the first carrier, the first control information from the access network device.

a determining unit 602, configured to determine, according to the first time unit, the first parameter, and the first duration, a second time unit of the second carrier, where the first parameter is a preset parameter or the first parameter is included in a parameter in the first control information, where the first parameter is 0 or a positive integer, the first duration is a time length of a first time unit of the first carrier or a second time of the second carrier The length of time of the unit, the length of time of the first time unit being different from the length of time of the second time unit.

The transmitting unit 603 is configured to perform data transmission with the access network device or other terminal device on the second time unit of the second carrier. Optionally, for the downlink data transmission, the transmission unit 603 may be replaced by the receiving unit 601, that is, the receiving unit 601 is further configured to receive data from the access network device on the second time unit of the second carrier. For uplink data transmission, the transmission unit 603 may be replaced by a sending unit, that is, the transmitting unit is configured to send data to the access network device on a second time unit of the second carrier. For V2X side-link data transmission, the transmission unit 603 may be replaced by a transmitting unit, that is, the transmitting unit is configured to transmit data to other terminal devices on the second time unit of the second carrier.

In an optional embodiment, the determining unit 602 is configured to determine, according to the first time unit, the first parameter, and the first duration, a second time unit of the second carrier, where the determining unit 602 determines The first time length of the first time unit is the first time, and the first time length is the first parameter multiplied by the first time length; the determining unit 602 is configured according to the first time A second time unit of the second carrier is determined at a time.

In an optional embodiment, the determining unit 602 determines, according to the first time, the second time unit of the second carrier, where the determining unit 602 determines the second carrier according to the first time. a third time unit, wherein the third time unit is a time unit corresponding to the second time on the second carrier, and the second time unit is a next time unit of the third time unit.

In an optional embodiment, the second time unit is a time unit corresponding to the second time on the second carrier.

In an optional embodiment, the first control information further includes a first offset, and the determining unit 602 determines the second time unit of the second carrier according to the first moment, including: determining The unit 602 determines a third time unit of the second carrier according to the first time, where the third time unit is a time unit corresponding to the second time on the second carrier; the determining unit 602 determines the The third time unit of the second carrier is backward offset by the first offset into a second time unit of the second carrier.

In an optional embodiment, the first control information further includes a first offset, and the determining unit 602 determines that the third time unit of the second carrier is backward offset by the first offset. a fourth time unit of the second carrier; the second time unit being a next time unit of the fourth time unit.

In an optional embodiment, the first control information further includes a first interval, and the transmitting unit 603 is further configured to: at least one of the first time intervals of the second carrier with the second time unit Data transmission with other terminal devices on the time unit of the interval.

In an optional embodiment, the first time unit includes at least one of a subframe, a time slot, a minislot, and a symbol; the second time unit includes a subframe, a time slot, a minislot, and a symbol. At least one of the third time units includes at least one of a subframe, a time slot, a minislot, and a symbol; the fourth time unit includes at least one of a subframe, a time slot, a minislot, and a symbol.

In an optional embodiment, the receiving unit 601 can be a receiver 701, the receiver 701 can be replaced by a transceiver 703, the determining unit 602 can be a processor 702, and the sending unit can be a transmitter The transmitter may be replaced by a transceiver 703, and the transmission unit 603 may be a transceiver 703. Meanwhile, the terminal device may further include a memory 704, where the memory 704 is used to store program codes and data of the terminal device. Specifically, as shown in FIG. 7, the terminal device includes a receiver 701, a processor 702, a transceiver 703, and a memory 704.

According to the embodiment of the present application, the terminal device determines the second time unit of the second carrier according to the first time unit, the first parameter, and the first duration of the first carrier, where the first duration is the first time unit of the first carrier The length of time or the length of time of the second time unit of the second carrier, the length of time of the first time unit is different from the time length of the second time unit, whereby the terminal device can be on the first carrier and the second carrier When the time unit lengths are different, cross-carrier scheduling is completed, and the access network device and the terminal device or the terminal device and other terminal devices can complete the transmission of control information and data when the time units of the first carrier and the second carrier are different, and the control is improved. The flexibility of cross-carrier scheduling.

The method of the embodiment of FIG. 3 will be specifically described below by taking FIG. 8 as an example.

Step 81: The access network device sends the first control information to the terminal device in the time unit n of the scheduling carrier, and the terminal device also receives the first control information from the access network device in the time unit n of the scheduling carrier. Optionally, the first control information is downlink control information.

Step 82: The access network device determines a second time unit of the scheduled carrier according to the time unit n, the first parameter k, and the first duration of the scheduled carrier.

Step 83: The terminal device determines a second time unit of the scheduled carrier according to the first time unit, the first parameter k, and the first duration of the scheduling carrier.

In step 82 or step 83, the first parameter k is a preset parameter, or the first parameter k is a parameter included in the first control information and is sent by the access network device to the terminal device, The first parameter k is 0 or a positive integer. The first duration is the length of time unit n of the scheduled carrier or the length of time of the second time unit of the scheduled carrier. The time lengths of the plurality of time units n, n+1 to n+5 of the scheduled carrier are equal, and the time lengths of the plurality of time units m to m+11 of the scheduled carrier are equal, but the scheduling carrier is more The time length of the time units n, n+1 to n+5 is different from the time length of the plurality of time units m to m+11 of the scheduled carrier. Optionally, the first duration may be different from a time length of the time unit n of the scheduling carrier or a time length of the second time unit of the scheduled carrier, for example, the time unit n of the scheduling carrier is a time slot. The first duration may be a minislot, and the time unit m of the scheduled carrier is a minislot, and the first duration may be a symbol or the like. Optionally, the sequence of step 82 and step 83 is not limited.

In an optional embodiment, the access network device or the terminal device determines that the termination time of the time unit n is backward and the first time length is the first time, and the first time length is the first parameter. k is multiplied by the first duration. For example, in FIG. 8, the first parameter k is 4, and the first duration is the time length of the time unit n of the scheduling carrier. Therefore, the first time in FIG. 8 is the termination time of the time unit n of the scheduling carrier, and the four schedulings are shifted backward. The time at which the carrier time unit is located.

The access network device or the terminal device determines a second time unit of the scheduled carrier according to the first moment. Optionally, the access network device or the terminal device determines that the time unit m+9 corresponding to the scheduled time on the scheduled carrier is the second time unit. Optionally, the access network device or the terminal device determines that the time unit m+9 corresponding to the scheduled carrier is the third time unit, and the access network device or the terminal device determines the next time unit m of m+9. +10 is the second time unit. Then, in the downlink data transmission, the access network device transmits data to the terminal device in the second time unit of the scheduled carrier. In uplink data transmission, the terminal device transmits data to the access network device in a second time unit of the scheduled carrier. In V2X data transmission, the terminal device transmits data to other terminal devices in the second time unit of the scheduled carrier.

For another example, in FIG. 9, the first parameter k is 4, and the first duration is the time length of the time unit m of the scheduled carrier. Therefore, the first time in FIG. 9 is the termination time of the time unit n of the scheduled carrier. The time at which the time length of the four scheduled carrier time units is located. The length of the time unit in which the carrier is scheduled in FIG. 9 is equal to twice the length of the time unit of the scheduled carrier, and therefore, the time length of the four scheduled carrier time units is equal to the length of the time unit of the two scheduled carriers.

The access network device or the terminal device determines a second time unit of the scheduled carrier according to the first moment. Optionally, the access network device or the terminal device determines that the time unit m+5 corresponding to the scheduled time on the scheduled carrier is the second time unit. Optionally, the access network device or the terminal device determines that the time unit m+5 corresponding to the scheduled carrier at the first time is the third time unit, and the access network device or the terminal device determines the next time unit m of the m+5. +6 is the second time unit. Then, in the downlink data transmission, the access network device transmits data to the terminal device in the second time unit of the scheduled carrier. In uplink data transmission, the terminal device transmits data to the access network device in a second time unit of the scheduled carrier. In V2X data transmission, the terminal device transmits data to other terminal devices in the second time unit of the scheduled carrier.

In an optional embodiment, the first control information further includes a first offset. The first offset may be a specific length of time or a number of subframes, timeslots, minislots, or symbols, and the first offset may also be indication information for indicating the length of time of the offset. In FIG. 8 or FIG. 9, the access network device or the terminal device determines a time unit after the second time unit of the scheduled carrier is shifted backward by the length of the first offset as a new second time unit. For example, in the absence of the first offset, the access network device or the terminal device determines that m+9 of the scheduled carrier is the second time unit, and the first offset is the time unit length of the two scheduled carriers, Then, the access network device or the terminal device determines that m+11 of the scheduled carrier is the second time unit. Optionally, the access network device or the terminal device offsets the first time back by the first offset to obtain a second time, and then the access network device or the terminal device determines according to the second time The second time is the corresponding second time unit on the scheduled carrier. The first offset may be determined by the access network device according to at least one of factors such as the number of terminal devices, the priority of data to be transmitted, the channel status, and the amount of data to be transmitted. The access network device determines the second time unit of the scheduled carrier for different terminal devices for data transmission according to different offsets, so that the scheduled carrier can be more effectively utilized in the time domain to avoid resource waste. .

In an alternative embodiment, in the scenario of V2X data transmission, in order to speed, position, direction, etc. of the vehicle, the terminal device transmits the same data packet to the other terminal devices multiple times. Facing such a scenario, the first control information further includes a first interval, for example, a time unit of two scheduled carriers, and the terminal device is spaced apart from the second time unit by the at least one of the first interval in the scheduled carrier. Data transmission with other terminal devices on the time unit. As shown in FIG. 8, the terminal device determines that the time unit m+9 of the scheduled carrier is a time unit for transmitting data to other terminal devices, and the terminal device further determines that two scheduled carrier time units are spaced apart from the time unit m+9. The time unit is used as the time unit for transmitting data, that is, the time unit m+12, m+15, etc. of the scheduled carrier is used for the terminal device to transmit the data to other terminal devices. The first interval may be determined by the terminal device according to at least one of factors such as priority, importance of the data packet, speed of the terminal device, location, and resource occupancy. The terminal device may determine the transmission resource of the data packet for multiple transmissions according to the first interval, and may improve the reliability and flexibility of the data packet transmission of multiple transmissions.

In an optional embodiment, the first interval is an interval of a start position of two transmission data, an interval of a termination position, or an interval between a termination position of the previous transmission data and a start position of the subsequent transmission data.

In an optional embodiment, if the data to be transmitted is n times, and n is an integer greater than or equal to 3, if the data to be transmitted n times has n-1 intervals, the first control information includes n-1 intervals. The n-1 intervals may be the same or different. When the n-1 intervals are the same, the first control information needs to indicate one interval information, and when n-1 intervals are different, the first A control message needs to be indicated separately for different intervals.

In an optional embodiment, the unit of the first interval is a subframe, a time slot, a minislot or a symbol on a scheduled carrier.

In an optional embodiment, the time units n to n+5 of the scheduled carrier are at least one of a subframe, a time slot, a minislot, and a symbol, and the time units m to m+11 of the scheduled carrier are subframes, At least one of a time slot, a minislot, and a symbol.

In an optional embodiment, if the first time determined by the access network device or the terminal device according to the foregoing method is the start time or the end time of the time unit of the scheduled carrier, the access network device or the terminal device determines The time unit preceding the first moment is used as the second time unit, or the access network device or the terminal device determines the time unit following the first moment as the second time unit. For example, in FIG. 8, the first time is the end time of the time unit m+9 of the scheduled carrier, that is, the first time is the start time of the time unit m+10 of the scheduled carrier, then the access network device or The terminal device determines that the time unit m+9 or m+10 of the scheduled carrier is the second time unit, and the second time unit is used for receiving or transmitting data by the access network device or the terminal device.

Step 84: The access network device and the terminal device transmit data on the second time unit of the scheduled carrier, or the terminal device sends data to the other terminal device on the second time unit of the scheduled carrier.

In the embodiment of the present application, although the time length of the scheduling carrier and the scheduled carrier are different, that is, the scheduling carrier and the scheduled carrier have different granularity in the time domain, the access network device or the terminal device sends the control information in the scheduling carrier. The time unit is backwards by k times the first time period to determine that the second time unit of the scheduled carrier is used as the time unit of the data transmission, and the first time length may be the length of the time unit in the scheduling carrier, and may also be the scheduled carrier. The length of the medium time unit, or may be other time lengths than the length of the time unit in the scheduling carrier or the scheduled carrier (for example, one of a subframe, a time slot, a minislot, and a symbol), therefore, The access network device or the terminal device may determine, according to the time unit n, the first parameter k, and the first duration of the scheduling carrier, a second time unit of the scheduled carrier for data transmission, that is, the time unit length is different. Control information and data transmission between carriers.

In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application, in essence or the contribution to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium. A number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present application. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .

Claims (30)

A data transmission method, comprising: The access network device sends the first control information to the terminal device in the first time unit of the first carrier; Determining, by the access network device, a second time unit of the second carrier according to the first time unit, the first parameter, and the first duration, where the first parameter is a preset parameter or the first parameter is included in a parameter in the first control information, where the first parameter is 0 or a positive integer, the first duration is a time length of a first time unit of the first carrier or a second time of the second carrier a length of time of the unit, the length of time of the first time unit being different from the length of time of the second time unit; The access network device performs data transmission with the terminal device on a second time unit of the second carrier. The method of claim 1 wherein Determining, by the access network device, the second time unit of the second carrier according to the first time unit, the first parameter, and the first duration, including: The access network device determines that the first time length of the first time unit is the first time, and the first time length is the first parameter multiplied by the first time length; The access network device determines a second time unit of the second carrier according to the first moment. The method of claim 2 wherein: Determining, by the access network device, the second time unit of the second carrier according to the first moment, including: Determining, by the access network device, a third time unit of the second carrier according to the first time, where the third time unit is a time unit corresponding to the second time on the second carrier, the second time The time unit is the next time unit of the third time unit. The method of claim 2 wherein: The second time unit is a time unit corresponding to the second time on the second carrier. The method of claim 2 wherein: The first control information further includes a first offset, and the determining, by the access network device, the second time unit of the second carrier according to the first moment, Determining, by the access network device, a third time unit of the second carrier according to the first time, where the third time unit is a time unit corresponding to the second time on the second carrier; The access network device determines that the third time unit of the second carrier is backward offset by the first offset into a second time unit of the second carrier. The method of claim 3 wherein: The first control information further includes a first offset, Determining, by the access network device, that the third time unit of the second carrier is backward offset by the first offset into a fourth time unit of the second carrier; The second time unit is the next time unit of the fourth time unit. A method according to any one of claims 1 to 6, wherein The first time unit includes at least one of a subframe, a time slot, a minislot, and a symbol; The second time unit includes at least one of a subframe, a time slot, a minislot, and a symbol; The third time unit includes at least one of a subframe, a time slot, a minislot, and a symbol; The fourth time unit includes at least one of a subframe, a time slot, a minislot, and a symbol. An access network device, comprising: a sending unit, configured to send first control information to the terminal device in a first time unit of the first carrier; a determining unit, configured to determine a second time unit of the second carrier according to the first time unit, the first parameter, and the first duration, where the first parameter is a preset parameter or the first parameter is included in the a parameter in the first control information, where the first parameter is 0 or a positive integer, the first duration is a time length of a first time unit of the first carrier or a second time unit of the second carrier Length of time, the length of time of the first time unit is different from the length of time of the second time unit; And a transmitting unit, configured to perform data transmission with the terminal device on a second time unit of the second carrier. The access network device according to claim 8, wherein The determining unit is configured to determine, according to the first time unit, the first parameter, and the first duration, a second time unit of the second carrier, including: Determining, by the determining unit, that the first time length of the first time unit is the first time, and the first time length is the first parameter multiplied by the first time length; The determining unit determines a second time unit of the second carrier according to the first moment. The access network device according to claim 9, wherein Determining, by the determining unit, the second time unit of the second carrier according to the first moment, Determining, by the determining unit, a third time unit of the second carrier according to the first time, where the third time unit is a time unit corresponding to the second time on the second carrier, and the second time unit Is the next time unit of the third time unit. The access network device according to claim 9, wherein The second time unit is a time unit corresponding to the second time on the second carrier. The access network device according to claim 9, wherein The first control information further includes a first offset, and the determining, by the determining unit, the second time unit of the second carrier according to the first moment, Determining, by the determining unit, a third time unit of the second carrier according to the first time, where the third time unit is a time unit corresponding to the second time on the second carrier; The determining unit determines that the third time unit of the second carrier is backward offset by the first offset into a second time unit of the second carrier. The access network device according to claim 10, characterized in that The first control information further includes a first offset, Determining, by the determining unit, that the third time unit of the second carrier is backward offset by the first offset into a fourth time unit of the second carrier; The second time unit is the next time unit of the fourth time unit. An access network device according to any of claims 8-13, characterized in that The first time unit includes at least one of a subframe, a time slot, a minislot, and a symbol; The second time unit includes at least one of a subframe, a time slot, a minislot, and a symbol; The third time unit includes at least one of a subframe, a time slot, a minislot, and a symbol; The fourth time unit includes at least one of a subframe, a time slot, a minislot, and a symbol. A data transmission method, comprising: Receiving, by the terminal device, first control information from the access network device in a first time unit of the first carrier; Determining, by the terminal device, a second time unit of the second carrier according to the first time unit, the first parameter, and the first duration, where the first parameter is a preset parameter or the first parameter is included in the a parameter in the first control information, where the first parameter is 0 or a positive integer, the first duration is a time length of a first time unit of the first carrier or a second time unit of the second carrier a length of time, the length of time of the first time unit is different from the length of time of the second time unit; The terminal device performs data transmission with the access network device or other terminal device on a second time unit of the second carrier. The method of claim 15 wherein: Determining, by the terminal device, the second time unit of the second carrier according to the first time unit, the first parameter, and the first duration, including: Determining, by the terminal device, that the first time length of the first time unit is the first time, the first time length is the first parameter multiplied by the first time length; The terminal device determines a second time unit of the second carrier according to the first moment. The method of claim 16 wherein: Determining, by the terminal device, the second time unit of the second carrier according to the first moment, including: Determining, by the terminal device, a third time unit of the second carrier according to the first time, where the third time unit is a time unit corresponding to the second time on the second carrier, the second time unit Is the next time unit of the third time unit. The method of claim 16 wherein: The second time unit is a time unit corresponding to the second time on the second carrier. The method of claim 16 wherein: The first control information further includes a first offset, and the determining, by the terminal device, the second time unit of the second carrier according to the first time, includes: Determining, by the terminal device, a third time unit of the second carrier according to the first time, where the third time unit is a time unit corresponding to the second time on the second carrier; The terminal device determines that the third time unit of the second carrier is backward offset by the first offset into a second time unit of the second carrier. The method of claim 17 wherein: The first control information further includes a first offset, Determining, by the terminal device, that the third time unit of the second carrier is backward offset by the first offset into a fourth time unit of the second carrier; The second time unit is the next time unit of the fourth time unit. Method according to any of claims 16-20, characterized in that The first control information further includes a first interval, and the method further includes: The terminal device performs data transmission with other terminal devices on a time unit of the second carrier that is separated from the second time unit by at least one of the first intervals. Method according to any of claims 15-21, characterized in that The first time unit includes at least one of a subframe, a time slot, a minislot, and a symbol; The second time unit includes at least one of a subframe, a time slot, a minislot, and a symbol; The third time unit includes at least one of a subframe, a time slot, a minislot, and a symbol; The fourth time unit includes at least one of a subframe, a time slot, a minislot, and a symbol. A terminal device, comprising: a receiving unit, configured to receive, by the first time unit of the first carrier, the first control information from the access network device; a determining unit, configured to determine a second time unit of the second carrier according to the first time unit, the first parameter, and the first duration, where the first parameter is a preset parameter or the first parameter is included in the a parameter in the first control information, where the first parameter is 0 or a positive integer, the first duration is a time length of a first time unit of the first carrier or a second time unit of the second carrier Length of time, the length of time of the first time unit is different from the length of time of the second time unit; And a transmitting unit, configured to perform data transmission with the access network device or other terminal device on a second time unit of the second carrier. The terminal device according to claim 23, characterized in that The determining unit is configured to determine, according to the first time unit, the first parameter, and the first duration, a second time unit of the second carrier, including: Determining, by the determining unit, that the first time length of the first time unit is the first time, and the first time length is the first parameter multiplied by the first time length; The determining unit determines a second time unit of the second carrier according to the first moment. The terminal device according to claim 24, characterized in that Determining, by the determining unit, the second time unit of the second carrier according to the first moment, Determining, by the determining unit, a third time unit of the second carrier according to the first time, where the third time unit is a time unit corresponding to the second time on the second carrier, and the second time unit Is the next time unit of the third time unit. The terminal device according to claim 24, characterized in that The second time unit is a time unit corresponding to the second time on the second carrier. The terminal device according to claim 24, characterized in that The first control information further includes a first offset, and the determining, by the determining unit, the second time unit of the second carrier according to the first moment, Determining, by the determining unit, a third time unit of the second carrier according to the first time, where the third time unit is a time unit corresponding to the second time on the second carrier; The determining unit determines that the third time unit of the second carrier is backward offset by the first offset into a second time unit of the second carrier. The terminal device according to claim 25, characterized in that The first control information further includes a first offset, Determining, by the determining unit, that the third time unit of the second carrier is backward offset by the first offset into a fourth time unit of the second carrier; The second time unit is the next time unit of the fourth time unit. A terminal device according to any one of claims 24 to 28, characterized in that The first control information further includes a first interval, The transmitting unit is further configured to perform data transmission with other terminal devices on a time unit of the second carrier that is separated from the second time unit by at least one of the first intervals. A terminal device according to any one of claims 23-29, characterized in that The first time unit includes at least one of a subframe, a time slot, a minislot, and a symbol; The second time unit includes at least one of a subframe, a time slot, a minislot, and a symbol; The third time unit includes at least one of a subframe, a time slot, a minislot, and a symbol; The fourth time unit includes at least one of a subframe, a time slot, a minislot, and a symbol.

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