CN108633090B - Data transmission method, terminal equipment and access network equipment - Google Patents

Data transmission method, terminal equipment and access network equipment Download PDF

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Publication number
CN108633090B
CN108633090B CN201710183304.XA CN201710183304A CN108633090B CN 108633090 B CN108633090 B CN 108633090B CN 201710183304 A CN201710183304 A CN 201710183304A CN 108633090 B CN108633090 B CN 108633090B
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time
time unit
unit
carrier
access network
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CN108633090A (en
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鲁振伟
刘德平
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to CN201710183304.XA priority Critical patent/CN108633090B/en
Priority to PCT/CN2018/079286 priority patent/WO2018171520A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

A data transmission method, a terminal device, an access network device and a system are provided, the method comprises the following steps: the access network equipment sends first control information to the terminal equipment in a first time unit of a first carrier; the access network equipment determines a second time unit of a second carrier according to the first time unit, the first parameter and the first time length, wherein the time length of the first time unit is different from the time length of the second time unit; and the access network equipment performs data transmission with the terminal equipment on a second time unit of the second carrier. Therefore, the access network equipment and the terminal equipment can finish the transmission of the control information and the data when the time unit lengths of the first carrier and the second carrier are different, and the flexibility of cross-carrier scheduling is improved.

Description

Data transmission method, terminal equipment and access network equipment
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
In a Frequency Division Duplex (FDD) system, cross-carrier scheduling is a technique for transmitting control information and data on different carriers. Taking the uplink data transmission as an example, the access network device transmits control information to the terminal device on the first time unit n (e.g. subframe n) of the scheduling carrier, and the terminal device will transmit data on the second time unit n + k (subframe n + k) of the scheduled carrier according to the control information, where the parameter k may be a preset parameter or is transmitted by the access network device and carried in the control information, and the time unit length of the scheduling carrier is the same as the time unit length of the scheduled carrier, i.e. the scheduling carrier and the scheduled carrier have the same granularity in the time domain, so that, according to the method in the prior art, the control information is transmitted on the first time unit n of the scheduling carrier, the data will be transmitted on the second time unit n + k of the scheduled carrier, but when the time unit lengths of the scheduling carrier and the scheduled carrier are different, that is, when the granularity of the scheduling carrier is different from the granularity of the scheduled carrier in the time domain, the access network device or the terminal device cannot determine the specific position of the second time unit n + k of the scheduled carrier for transmitting data, so that the data cannot be transmitted. When the time unit length of the scheduling carrier is different from that of the scheduled carrier, the existing cross-carrier scheduling cannot be performed.
Therefore, a method for transmitting control information and data between carriers with different time unit lengths is needed in the art.
Disclosure of Invention
Embodiments of the present application provide a data transmission method, a terminal device, and an access network device, which can implement transmission of control information and data between carriers with different time unit lengths.
In a first aspect, an embodiment of the present application provides a data transmission method, including: the access network equipment sends first control information to the terminal equipment in 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, where the first parameter is a preset parameter or a parameter included in the first control information, the first parameter is 0 or a positive integer, the first time length is 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, and the time length of the first time unit is different from the time length of the second time unit; and the access network equipment performs data transmission with the terminal equipment on a second time unit of the second carrier.
In one possible design, the 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 time length includes: the access network equipment determines that a first time length backward from the termination time of the first time unit is the first time, and the first time length is the first time multiplied by the first parameter; and the access network equipment determines a second time unit of the second carrier according to the first time.
In one possible design, the determining, by the access network device, the second time unit of the second carrier according to the first time includes: and the access network equipment determines a third time unit of a second carrier according to the first time, wherein the third time unit is a time unit corresponding to the first 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 first time on the second carrier.
In one possible design, the first control information further includes a first offset, and the determining, by the access network device according to the first time, a second time unit of the second carrier includes: the access network equipment determines a third time unit of a second carrier according to the first moment, wherein the third time unit is a time unit corresponding to the first moment on the second carrier; the access network equipment determines that the third time unit of the second carrier wave is shifted backward by the first offset amount to be the second time unit of the second carrier wave.
In one possible design, the first control information further includes a first offset, and the access network device determines that a third time unit of the second carrier is offset backward by the first offset as a fourth time unit of the second carrier; the second time unit is a time unit next to the fourth time unit.
In one possible design, the first time unit includes at least one of a subframe, a slot, a minislot, and a symbol; the second time unit comprises at least one of a subframe, a slot, a minislot, and a symbol; the third time unit comprises at least one of a subframe, a slot, a minislot, and a symbol; the fourth time unit includes at least one of a subframe, a 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 a terminal device in a first time unit of a first carrier; a determining unit, configured to determine a second time unit of a second carrier according to the first time unit, a first parameter and a first time length, where the first parameter is a preset parameter or a parameter included in the first control information, the first parameter is 0 or a positive integer, the first time length is a time length of the first time unit of the first carrier or a time length of a second time unit of the second carrier, and the time length of the first time unit is different from the time length of the second time unit; and the transmission unit is used for carrying out data transmission with the terminal equipment on a second time unit of the second carrier.
In one possible design, the determining unit is configured to determine a second time unit of a second carrier according to the first time unit, a first parameter, and a first time length, and includes: the determining unit determines that a first time length backward from the termination time of the first time unit is the first time, and the first time length is the first time length multiplied by the first parameter; the determining unit determines a second time unit of the second carrier according to the first time.
In one possible design, the determining unit determines the second time unit of the second carrier according to the first time, including: the determining unit determines a third time unit of a second carrier according to the first time, where the third time unit is a time unit corresponding to the first 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 first time on the second carrier.
In one 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 time, including: the determining unit determines a third time unit of a second carrier according to the first time, wherein the third time unit is a time unit corresponding to the first time on the second carrier; the determining unit determines that a third time unit of the second carrier is shifted backward by the first offset amount to be a second time unit of the second carrier.
In one possible design, the first control information further includes a first offset, and the determining unit determines that a third time unit of the second carrier is offset backward by the first offset as a fourth time unit of the second carrier; the second time unit is a time unit next to the fourth time unit.
In one possible design, the first time unit includes at least one of a subframe, a slot, a minislot, and a symbol; the second time unit comprises at least one of a subframe, a slot, a minislot, and a symbol; the third time unit comprises at least one of a subframe, a slot, a minislot, and a symbol; the fourth time unit includes at least one of a subframe, a slot, a minislot, and a symbol.
In one possible design, the processing unit may be a processor (processor), the transmitting unit may be a transmitter (transmitter) or a transceiver (transceiver), and the transmitting unit may be a transceiver.
In a third aspect, an embodiment of the present application provides a data transmission method, including: the terminal equipment receives first control information from the access network equipment at a first time unit of a first carrier; the terminal device determines a second time unit of a second carrier according to the first time unit, a first parameter and a first time length, wherein the first parameter is a preset parameter or a parameter contained in the first control information, the first parameter is 0 or a positive integer, the first time length is 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, and the time length of the first time unit is different from the time length of the second time unit; and the terminal equipment performs data transmission with the access network equipment or other terminal equipment on a second time unit of the second carrier.
In one 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 time length includes: the terminal device determines that a first time length backward from the termination time of the first time unit is the first time, and the first time length is the first time length multiplied by the first parameter; and the terminal equipment determines a second time unit of the second carrier according to the first time.
In one possible design, the determining, by the terminal device, the second time unit of the second carrier according to the first time includes: and the terminal equipment determines a third time unit of a second carrier according to the first moment, wherein the third time unit is a time unit corresponding to the first moment on the second carrier, and the second time unit is the next time unit of the third time unit.
In one possible design, the second time unit is a time unit corresponding to the first time on the second carrier.
In one possible design, the first control information further includes a first offset, and the determining, by the terminal device, a second time unit of the second carrier according to the first time includes: the terminal equipment determines a third time unit of a second carrier according to the first moment, wherein the third time unit is a time unit corresponding to the first moment on the second carrier; and the terminal equipment determines that the third time unit of the second carrier wave is shifted backwards by the first offset amount to be the second time unit of the second carrier wave.
In one possible design, the first control information further includes a first offset, and the terminal device determines that a third time unit of the second carrier is offset backward by the first offset to be a fourth time unit of the second carrier; the second time unit is a time unit next to the fourth time unit.
In one possible design, the first control information further includes a first interval, and the method further includes: and the terminal equipment transmits data with other terminal equipment on the time unit of the second carrier which is separated from the second time unit by at least one first interval.
In one possible design, the first time unit includes at least one of a subframe, a slot, a minislot, and a symbol; the second time unit comprises at least one of a subframe, a slot, a minislot, and a symbol; the third time unit comprises at least one of a subframe, a slot, a minislot, and a symbol; the fourth time unit includes at least one of a subframe, a 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 an access network device at a first time unit of a first carrier; a determining unit, configured to determine a second time unit of a second carrier according to the first time unit, a first parameter and a first time length, where the first parameter is a preset parameter or a parameter included in the first control information, the first parameter is 0 or a positive integer, the first time length is a time length of the first time unit of the first carrier or a time length of a second time unit of the second carrier, and the time length of the first time unit is different from the time length of the second time unit; and a transmission unit, configured to perform data transmission with the access network device or other terminal devices in a second time unit of the second carrier.
In one possible design, the determining unit is configured to determine a second time unit of a second carrier according to the first time unit, a first parameter, and a first time length, and includes: the determining unit determines that a first time length backward from the termination time of the first time unit is the first time, and the first time length is the first time length multiplied by the first parameter; the determining unit determines a second time unit of the second carrier according to the first time.
In one possible design, the determining unit determines the second time unit of the second carrier according to the first time, including: the determining unit determines a third time unit of a second carrier according to the first time, where the third time unit is a time unit corresponding to the first 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 first time on the second carrier.
In one 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 time, including: the determining unit determines a third time unit of a second carrier according to the first time, wherein the third time unit is a time unit corresponding to the first time on the second carrier; the determining unit determines that a third time unit of the second carrier is shifted backward by the first offset amount to be a second time unit of the second carrier.
In one possible design, the first control information further includes a first offset, and the determining unit determines that a third time unit of the second carrier is offset backward by the first offset as a fourth time unit of the second carrier; the second time unit is a time unit next to the fourth time unit.
In one possible design, the first control information further includes a first interval, and the transmission unit is further configured to perform data transmission with other terminal devices in a time unit of the second carrier that is separated from the second time unit by at least one first interval.
In one possible design, the first time unit includes at least one of a subframe, a slot, a minislot, and a symbol; the second time unit comprises at least one of a subframe, a slot, a minislot, and a symbol; the third time unit comprises at least one of a subframe, a slot, a minislot, and a symbol; the fourth time unit includes at least one of a subframe, a slot, a minislot, and a symbol.
In one possible design, the processing unit may be a processor (processor), the receiving unit may be a receiver (receiver) or a transceiver (transceiver), and the receiving 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 for the access network device, which includes a program designed to execute the above aspects.
In a sixth aspect, an embodiment of the present application provides a computer storage medium for storing computer software instructions for the terminal device, which includes a program designed to execute the above aspects.
Through the scheme, the access network equipment sends the first control information to the terminal equipment at the first time unit of the first carrier, the access network equipment determines the second time unit of the second carrier according to the first time unit, the first parameter and the first time length, the first time length is the time length of the first time unit of the first carrier or the time length of the second time unit of the second carrier, and the time length of the first time unit is different from the time length of the second time unit, so that the access network equipment and the terminal equipment can finish the transmission of the control information and the data when the time unit lengths of the first carrier and the second carrier are different, and the flexibility of cross-carrier scheduling is improved.
Drawings
FIG. 1 is a schematic architecture diagram of a system according to an embodiment of the present application.
Fig. 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 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 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 scheduled 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 according to the control information. In uplink data transmission, the access network device sends control information to the terminal device 1 on a scheduling carrier, and then the terminal device 1 sends data to the access network on the scheduled carrier according to the control information, and the access network device also receives the data from the terminal device 1 on the scheduled carrier according to the control information. In sidelink data transmission, i.e. Vehicle to Vehicle communication (V2X) or Vehicle to Vehicle communication (V2V), the access network device transmits control information to terminal device 1 on the scheduled carrier, and then terminal device 1 transmits data to terminal device 2 on the scheduled carrier according to the control information, and terminal device 2 blindly detects the data transmitted by terminal device 1 to receive the data. The time unit length of the scheduling 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 scheduling carrier or the scheduled carrier may be a subframe, a time slot, a micro-slot, or a symbol. The symbol may be a fixed time length, or may be one of a plurality of fixed time lengths, and each of the plurality of fixed time lengths may be a candidate for the time length of the symbol. The length of the subframe is a predefined length of time, e.g. 1 ms. A slot includes several symbols, which may include 7 symbols or 14 symbols, for example. A micro-slot contains at least one symbol and at most one symbol less than the number of symbols contained in the slot.
The access network device referred to in the present application is a device deployed in a radio access network to provide a terminal device with a wireless communication function. The access network device may include various forms of Base Stations (BSs), such as macro or micro Base stations, relay stations or access points, and so on. In systems using different radio access technologies, the name of a device with access network function may be different, for example, it is an access network device in a fifth generation 5G network, in an LTE network, it is called an evolved node B (eNB or eNodeB), in a third generation 3G network, it is called a node B (node B), etc., or a roadside Unit (RSU) in V2V communication. For convenience of description, the above-mentioned apparatus for providing a wireless communication function for a terminal device is referred to as an access network device in this application.
The terminal devices referred to herein may include various handheld devices having wireless communication capabilities, such as vehicle mounted devices, wearable devices, computing devices or other processing devices connected to a wireless modem, a Mobile Station (MS), a terminal (terminal) or User Equipment (UE), and so forth. For convenience of description, the above-mentioned devices are collectively referred to as terminal devices in this application.
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 provided in an embodiment of the present application, which specifically include the following steps:
step 31, the access network device sends the first control information to the terminal device at the first time unit of the first carrier, and the terminal device receives the first control information from the access network device at 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), where the DCI may include time-frequency domain resources 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 time length.
And 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 time length.
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, 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 time length of a second time unit of the second carrier, and the time length of the first time unit is different from the time length of the second time unit.
In alternative embodiments, the sequence of step 32 and step 33 is not limited.
Step 34(1), the access network device performs data transmission with the terminal device on the 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 at the second time unit of the second carrier, and the terminal device receives data from the access network device at the second time unit of the second carrier; or the uplink data transmission is performed, that is, the access network device receives data from the terminal device in the second time unit of the second carrier, and the terminal device sends data to the access network device in the second time unit of the second carrier.
And 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 other terminal devices in the second time unit of the second carrier, and the other terminal devices may receive the data in a blind detection manner.
In an optional embodiment, in step 32 or step 33, the determining, by the access network device or the terminal device, a second time unit of a second carrier according to the first time unit, the first parameter, and the first time length includes: and the access network equipment or the terminal equipment determines that a first time length backward from the termination time of the first time unit is the first time, and the first time length is the first time multiplied by the first parameter. And the access network equipment or the terminal equipment determines a second time unit of the second carrier according to the first time. Optionally, the second time unit is a time unit corresponding to the first 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 time includes: and the access network equipment or the terminal equipment determines a third time unit of a second carrier according to the first time, wherein the third time unit is a time unit corresponding to the first time on the second carrier, and the second time unit is the next time unit of the third time unit.
In an optional embodiment, the first control information further includes a first offset, and the determining, by the access network device according to the first time, a second time unit of the second carrier includes: the access network equipment determines a third time unit of a second carrier according to the first moment, wherein the third time unit is a time unit corresponding to the first moment on the second carrier; the access network equipment determines that the third time unit of the second carrier wave is shifted backward by the first offset amount to be the second time unit of the second carrier wave.
In an optional embodiment, the first control information further includes a first offset, and the access network device or the terminal device determines that a third time unit of the second carrier is offset backward by the first offset to be a fourth time unit of the second carrier, where the second time unit is a next time unit of the fourth time unit.
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 time unit, the first parameter, and the first time length further includes: the access network device or the terminal device determines that a first time length backward from the termination time of the first time unit is the first time, and the first time length is the first time length multiplied by the first parameter; the access network equipment or the terminal equipment shifts the first time backwards by the first offset to obtain a second time; and the access network equipment or the terminal equipment 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 performs data transmission with other terminal devices in a time unit of the second carrier that is separated from the second time unit by at least one first interval.
In an alternative embodiment, the first time unit includes at least one of a subframe, a slot, a minislot, and a symbol, the second time unit includes at least one of a subframe, a slot, a minislot, and a symbol, the third time unit includes at least one of a subframe, a slot, a minislot, and a symbol, and the fourth time unit includes at least one of a subframe, a slot, a minislot, and a symbol.
According to the embodiment of the application, the access network equipment or the terminal equipment determines the second time unit of the second carrier according to the first time unit, the first parameter and the first time length of the first carrier, wherein the first time length is the time length of the first time unit of the first carrier or the time length of the second time unit of the second carrier, and the time length of the first time unit is different from the time length of the second time unit.
Fig. 4 shows a schematic diagram of a possible structure of an access network device for executing the method involved in the embodiment of fig. 3, where the access network device includes a sending unit 401, a determining unit 402, and a transmitting unit 403.
A sending unit 401, configured to send first control information to a terminal device in a first time unit of a first carrier.
A determining unit 402, configured to determine a second time unit of a second carrier according to the first time unit, a first parameter and a first time length, where the first parameter is a preset parameter or is a parameter included in the first control information, the first parameter is 0 or a positive integer, the first time length is a time length of the first time unit of the first carrier or a time length of a second time unit of the second carrier, and the time length of the first time unit is different from the time length of the second time unit.
A transmitting unit 403, configured to perform data transmission with the terminal device in a second time unit of the second carrier. Optionally, for 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 in the second time unit of the second carrier. For uplink data transmission, the transmitting unit 403 may be replaced by a receiving unit, i.e. a receiving unit for receiving data from the terminal device on the second time unit of the second carrier.
In an optional embodiment, the determining unit 402 is configured to determine a second time unit of a second carrier according to the first time unit, a first parameter, and a first time length, and includes: the determining unit 402 determines a first time length after the termination time of the first time unit as the first time, where the first time length is obtained by multiplying the first parameter by the first duration; the determining unit 402 determines a second time unit of the second carrier according to the first time.
In an alternative embodiment, the determining unit 402 determines the second time unit of the second carrier according to the first time, including: the determining unit 402 determines a third time unit of a second carrier according to the first time, where the third time unit is a time unit corresponding to the first time on the second carrier, and the second time unit is a time unit next to the third time unit.
In an optional embodiment, the second time unit is a time unit corresponding to the first 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 time, including: the determining unit 402 determines a third time unit of a second carrier according to the first time, where the third time unit is a time unit corresponding to the first time on the second carrier; the determining unit 402 determines that the third time unit of the second carrier is shifted backward by the first offset amount to be the 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 a third time unit of the second carrier is offset backward by the first offset to be a fourth time unit of the second carrier; the second time unit is a time unit next to the fourth time unit.
In an alternative embodiment, the first time unit includes at least one of a subframe, a slot, a minislot, and a symbol; the second time unit comprises at least one of a subframe, a slot, a minislot, and a symbol; the third time unit comprises at least one of a subframe, a slot, a minislot, and a symbol; the fourth time unit includes at least one of a subframe, a slot, a minislot, and a symbol.
In an alternative embodiment, the sending unit 401 may be a sender 501, the sender 501 may be replaced by a transceiver 503, the determining unit 402 may be a processor 502, the receiving unit may be a receiver, the receiver may be replaced by a transceiver 503, the transmitting unit 403 may be a transceiver 503, and 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, and specifically as shown in fig. 5, the access network device includes the sender 501, the processor 502, the transceiver 503 and the memory 504.
Through the embodiment of the application, the access network equipment determines the second time unit of the second carrier according to the first time unit, the first parameter and the first time length of the first carrier, wherein the first time length is the time length of the first time unit of the first carrier or the time length of the second time unit of the second carrier, and the time length of the first time unit is different from the time length of the second time unit.
Fig. 6 shows a schematic diagram of a possible structure of a terminal device for performing the method involved in the embodiment of fig. 3, where the access network device includes a receiving unit 601, a determining unit 602, and a transmitting unit 603.
A receiving unit 601, configured to receive first control information from an access network device at a first time unit of a first carrier.
A determining unit 602, configured to determine a second time unit of a second carrier according to the first time unit, a first parameter and a first time length, where the first parameter is a preset parameter or is a parameter included in the first control information, the first parameter is 0 or a positive integer, the first time length is a time length of the first time unit of the first carrier or a time length of a second time unit of the second carrier, and the time length of the first time unit is different from the time length of the second time unit.
A transmitting unit 603, configured to perform data transmission with the access network device or other terminal devices on a second time unit of the second carrier. Optionally, for downlink data transmission, the transmitting 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 in the second time unit of the second carrier. For uplink data transmission, the transmitting unit 603 may be replaced by a sending unit, that is, the sending unit is configured to send data to the access network device on the second time unit of the second carrier. For the sidelink data transmission of V2X, the transmitting unit 603 may be replaced by a transmitting unit, i.e. a transmitting unit for transmitting 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 the second time unit of the second carrier according to the first time unit, the first parameter, and the first time length, and includes: the determining unit 602 determines that a first time length after the termination time of the first time unit is the first time, where the first time length is the first time length multiplied by the first parameter; the determining unit 602 determines a second time unit of the second carrier according to the first time.
In an optional embodiment, the determining unit 602 determines the second time unit of the second carrier according to the first time, including: the determining unit 602 determines a third time unit of a second carrier according to the first time, where the third time unit is a time unit corresponding to the first time on the second carrier, and the second time unit is a time unit next to the third time unit.
In an optional embodiment, the second time unit is a time unit corresponding to the first time on the second carrier.
In an optional embodiment, the first control information further includes a first offset, and the determining unit 602 determines, according to the first time, a second time unit of the second carrier, including: the determining unit 602 determines a third time unit of a second carrier according to the first time, where the third time unit is a time unit corresponding to the first time on the second carrier; the determining unit 602 determines that the third time unit of the second carrier is shifted backward by the first offset amount to be the 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 a third time unit of the second carrier is offset backward by the first offset to be a fourth time unit of the second carrier; the second time unit is a time unit next to 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 perform data transmission with other terminal devices in a time unit of the second carrier that is separated from the second time unit by at least one first interval.
In an alternative embodiment, the first time unit includes at least one of a subframe, a slot, a minislot, and a symbol; the second time unit comprises at least one of a subframe, a slot, a minislot, and a symbol; the third time unit comprises at least one of a subframe, a slot, a minislot, and a symbol; the fourth time unit includes at least one of a subframe, a slot, a minislot, and a symbol.
In an alternative embodiment, the receiving unit 601 may be a receiver 701, the receiver 701 may be replaced by a transceiver 703, the determining unit 602 may be a processor 702, the sending unit may be a sender, the sender may be replaced by the transceiver 703, the transmitting unit 603 may be the transceiver 703, and 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, and specifically as shown in fig. 7, the terminal device includes the receiver 701, the processor 702, the transceiver 703 and the memory 704.
Through the embodiment of the 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 time length of the first carrier, wherein the first time length is the time length of the first time unit of the first carrier or the time length of the second time unit of the second carrier, and the time length of the first time unit is different from the time length of the second time unit, so that the terminal device can complete cross-carrier scheduling when the time unit lengths of the first carrier and the second carrier are different, and the access network device and the terminal device or the terminal device and other terminal devices can complete transmission of control information and data when the time unit lengths of the first carrier and the second carrier are different, thereby improving flexibility of cross-carrier scheduling.
The method of the embodiment of fig. 3 is specifically described below by taking fig. 8 as an example.
In step 81, the access network device sends the first control information to the terminal device at time unit n when the carrier is scheduled, and the terminal device also receives the first control information from the access network device at time unit n when the carrier is scheduled. 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 of the scheduled carrier, the first parameter k and the first time length.
And step 83, the terminal equipment determines a second time unit of the scheduled carrier according to the first time unit, the first parameter k and the first time length of the scheduled 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 to the terminal device by the access network device, where the first parameter k is 0 or a positive integer. The first duration is a time length of a time unit n of the scheduling carrier or a time length of a second time unit of the scheduled carrier. The time lengths of the time units n, n +1 to n +5 of the scheduling carrier are equal, the time lengths of the time units m to m +11 of the scheduled carrier are equal, but the time lengths of the time units n, n +1 to n +5 of the scheduling carrier are different from the time lengths of the time units m to m +11 of the scheduled carrier. Optionally, the first time length may be different from the time length of the time unit n of the scheduling carrier or the time length of the second time unit of the scheduled carrier, for example, if the time unit n of the scheduling carrier is a time slot, the first time length may be a micro time slot, and if the time unit m of the scheduled carrier is a micro time slot, the first time length may be a symbol, and so on. 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 shifted backward by a first time length as the first time, where the first time length is obtained by multiplying the first parameter k 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 scheduled carrier, so the first time in fig. 8 is a time at which the termination time of the time unit n of the scheduled carrier is shifted backward by the time length of the time unit n of the 4 scheduled carriers.
And the access network equipment or the terminal equipment determines a second time unit of the scheduled carrier according to the first time. Optionally, the access network device or the terminal device determines that time unit m +9 corresponding to the scheduled carrier at the first time is the second time unit. Optionally, the access network device or the terminal device determines that time unit m +9 corresponding to the scheduled carrier at the first time is a third time unit, and the access network device or the terminal device determines that the next time unit m +10 of m +9 is a second time unit. Then, in the downlink data transmission, the access network device sends data to the terminal device in the second time unit of the scheduled carrier. In uplink data transmission, the terminal equipment sends data to the access network equipment at the second time unit of the scheduled carrier. In V2X data transmission, the terminal device transmits data to the other terminal device 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, so the first time in fig. 9 is a time at which the termination time of the time unit n of the scheduled carrier is shifted backward by the time lengths of the time units of the 4 scheduled carriers. In fig. 9 the length of the time unit of the scheduling carrier is equal to 2 times the length of the time unit of the scheduled carrier, and therefore the length of the time unit of the 4 scheduled carriers is equal to the length of the time unit of the 2 scheduling carriers.
And the access network equipment or the terminal equipment determines a second time unit of the scheduled carrier according to the first time. Optionally, the access network device or the terminal device determines that a time unit m +5 corresponding to the scheduled carrier at the first time is a second time unit. Optionally, the access network device or the terminal device determines that time unit m +5 corresponding to the scheduled carrier at the first time is a third time unit, and the access network device or the terminal device determines that the next time unit m +6 of m +5 is a second time unit. Then, in the downlink data transmission, the access network device sends data to the terminal device in the second time unit of the scheduled carrier. In uplink data transmission, the terminal equipment sends data to the access network equipment at the second time unit of the scheduled carrier. In V2X data transmission, the terminal device transmits data to the other terminal device in the second time unit of the scheduled carrier.
In an alternative embodiment, the first control information further comprises a first offset. The first offset may be a specific time length or the number of subframes, slots, minislots, or symbols, and the first offset may also be indication information for indicating the time length of the offset. In fig. 8 or fig. 9, the access network device or the terminal device determines, as a new second time unit, a time unit of the scheduled carrier, which is shifted backward by the time length of the first offset. 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 2 scheduled carriers, and 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 shifts the first time backward by the first offset to obtain a second time, and then the access network device or the terminal device determines a second time unit corresponding to the second time on the scheduled carrier according to the second time. The first offset may be determined by the access network device according to at least one of the number of the terminal devices, the priority of the data to be transmitted, the channel condition, and the amount of the data to be transmitted. The access network device determines the second time unit of the scheduled carrier for data transmission according to different offsets for different terminal devices, so that the scheduled carrier can be more effectively utilized in the time domain, and resource waste is avoided.
In an alternative embodiment, in the scenario of V2X data transmission, the terminal device may send the same data packet to other terminal devices multiple times in order to determine the speed, position, direction, etc. of the vehicle. Faced with this scenario, the first control information further includes a first interval, for example, time units of 2 scheduled carriers, and the terminal device performs data transmission with other terminal devices on time units of the scheduled carriers that are at least one of the first intervals apart from the second time unit. As shown in fig. 8, if the terminal device determines that time unit m +9 of the scheduled carrier is a time unit for transmitting data to other terminal devices, the terminal device also determines a time unit which is 2 time units of the scheduled carrier apart from time unit m +9 as a time unit for transmitting data, that is, time units m +12, m +15, etc. of the scheduled carrier are 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 the priority, importance, speed, location, and resource occupation of the data packet. The terminal equipment can determine the sending resources of the data packets transmitted for multiple times according to the first interval, and can improve the reliability and flexibility of sending the data packets transmitted for multiple times.
In an alternative embodiment, the first interval is an interval between start positions of two times of data transmission, an interval between end positions of two times of data transmission, or an interval between an end position of data transmission in the previous time and a start position of data transmission in the subsequent time.
In an optional embodiment, if the data to be transmitted is n times, where n is an integer greater than or equal to 3, then n times of data to be transmitted have n-1 intervals, the first control information includes n-1 intervals, where the n-1 intervals may be the same or different, and when the n-1 intervals are the same, the first control information needs to indicate 1 piece of interval information, and when the n-1 intervals are different, the first control information needs to indicate different intervals respectively.
In an alternative embodiment, the unit of the first interval is a subframe, a slot, a minislot, or a symbol on a scheduled carrier.
In an alternative embodiment, the time units n to n +5 of the scheduled carrier are at least one of a subframe, a slot, a minislot, and a symbol, and the time units m to m +11 of the scheduled carrier are at least one of a subframe, a slot, a minislot, and a symbol.
In an alternative embodiment, if the first time determined by the access network device or the terminal device according to the foregoing method is a starting time or a terminating time of a time unit of a scheduled carrier, the access network device or the terminal device determines a time unit before the first time as the second time unit, or the access network device or the terminal device determines a time unit after the first time as the second time unit. For example, in fig. 8, the first time is the termination 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 this second time unit is used for the access network device or the terminal device to receive or transmit data.
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 other terminal devices on the second time unit of the scheduled carrier.
In this embodiment, although the lengths of the time units of the scheduling carrier and the scheduled carrier are different, that is, the scheduling carrier and the scheduled carrier are different in granularity in the time domain, the access network device or the terminal device may shift the time unit for sending the control information in the scheduling carrier backward by k times of the first time length to determine that the second time unit of the scheduled carrier is used as the time unit for data transmission, since the first time length may be the length of the time unit in the scheduling carrier, may also be the length of the time unit in the scheduled carrier, or may also be another time length (for example, one of a subframe, a time slot, a micro-slot, or a symbol) other than the length of the time unit in the scheduling carrier or the scheduled carrier, the access network device or the terminal device may determine the second time unit of the scheduled carrier for data transmission according to the time unit n of the scheduling carrier, the first parameter k, and the first time length, namely, the transmission of control information and data between carriers with different time unit lengths is realized.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a 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 stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

Claims (28)

1. A method of data transmission, comprising:
the access network equipment sends first control information to the terminal equipment in 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, where the first parameter is a preset parameter or a parameter included in the first control information, the first parameter is 0 or a positive integer, the first time length is 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, and the time length of the first time unit is different from the time length of the second time unit;
the access network equipment performs data transmission with the terminal equipment on a second time unit of the second carrier; the first time unit comprises at least one of a subframe, a slot, a minislot, and a symbol;
the second time unit comprises at least one of a subframe, a slot, a minislot, and a symbol;
wherein the content of the first and second substances,
the determining, by the access network device, a second time unit of a second carrier according to the first time unit, the first parameter, and the first time length includes:
the access network equipment determines that a first time length backward from the termination time of the first time unit is the first time, and the first time length is the first time multiplied by the first parameter;
and the access network equipment determines a second time unit of the second carrier according to the first time.
2. The method of claim 1,
the determining, by the access network device, a second time unit of the second carrier according to the first time includes:
and the access network equipment determines a third time unit of a second carrier according to the first time, wherein the third time unit is a time unit corresponding to the first time on the second carrier, and the second time unit is a next time unit of the third time unit.
3. The method of claim 1,
the second time unit is a time unit corresponding to the first time on the second carrier.
4. The method of claim 1,
the first control information further includes a first offset, and the access network device determines a second time unit of the second carrier according to the first time, including:
the access network equipment determines a third time unit of a second carrier according to the first moment, wherein the third time unit is a time unit corresponding to the first moment on the second carrier;
the access network equipment determines that the third time unit of the second carrier wave is shifted backward by the first offset amount to be the second time unit of the second carrier wave.
5. The method of claim 2,
the first control information further includes a first offset,
the access network equipment determines that a third time unit of the second carrier wave shifts backwards by the first offset amount to be a fourth time unit of the second carrier wave;
the second time unit is a time unit next to the fourth time unit.
6. The method of claim 5,
the third time unit comprises at least one of a subframe, a slot, a minislot, and a symbol;
the fourth time unit includes at least one of a subframe, a slot, a minislot, and a symbol.
7. An access network device, comprising:
a sending unit, configured to send first control information to a terminal device in a first time unit of a first carrier;
a determining unit, configured to determine a second time unit of a second carrier according to the first time unit, a first parameter and a first time length, where the first parameter is a preset parameter or a parameter included in the first control information, the first parameter is 0 or a positive integer, the first time length is a time length of the first time unit of the first carrier or a time length of a second time unit of the second carrier, and the time length of the first time unit is different from the time length of the second time unit;
a transmission unit, configured to perform data transmission with the terminal device in a second time unit of the second carrier;
the first time unit comprises at least one of a subframe, a slot, a minislot, and a symbol;
the second time unit comprises at least one of a subframe, a slot, a minislot, and a symbol;
wherein the content of the first and second substances,
the determining unit is configured to determine a second time unit of a second carrier according to the first time unit, the first parameter, and the first time duration, and includes:
the determining unit determines that a first time length backward from the termination time of the first time unit is the first time, and the first time length is the first time length multiplied by the first parameter;
the determining unit determines a second time unit of the second carrier according to the first time.
8. The access network device of claim 7,
the determining unit determines a second time unit of the second carrier according to the first time, including:
the determining unit determines a third time unit of a second carrier according to the first time, where the third time unit is a time unit corresponding to the first time on the second carrier, and the second time unit is a next time unit of the third time unit.
9. The access network device of claim 7,
the second time unit is a time unit corresponding to the first time on the second carrier.
10. The access network device of claim 7,
the first control information further includes a first offset, and the determining unit determines a second time unit of the second carrier according to the first time, including:
the determining unit determines a third time unit of a second carrier according to the first time, wherein the third time unit is a time unit corresponding to the first time on the second carrier;
the determining unit determines that a third time unit of the second carrier is shifted backward by the first offset amount to be a second time unit of the second carrier.
11. The access network device of claim 8,
the first control information further includes a first offset,
the determining unit determines that a third time unit of the second carrier is shifted backward by the first offset amount to be a fourth time unit of the second carrier;
the second time unit is a time unit next to the fourth time unit.
12. The access network device of claim 11,
the third time unit comprises at least one of a subframe, a slot, a minislot, and a symbol;
the fourth time unit includes at least one of a subframe, a slot, a minislot, and a symbol.
13. A method of data transmission, comprising:
the terminal equipment receives first control information from the access network equipment at a first time unit of a first carrier;
the terminal device determines a second time unit of a second carrier according to the first time unit, a first parameter and a first time length, wherein the first parameter is a preset parameter or a parameter contained in the first control information, the first parameter is 0 or a positive integer, the first time length is 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, and the time length of the first time unit is different from the time length of the second time unit;
the terminal equipment performs data transmission with the access network equipment or other terminal equipment on a second time unit of the second carrier;
the first time unit comprises at least one of a subframe, a slot, a minislot, and a symbol;
the second time unit comprises at least one of a subframe, a slot, a minislot, and a symbol;
wherein the content of the first and second substances,
the terminal device determines a second time unit of a second carrier according to the first time unit, the first parameter and the first time length, and the method comprises the following steps:
the terminal device determines that a first time length backward from the termination time of the first time unit is the first time, and the first time length is the first time length multiplied by the first parameter;
and the terminal equipment determines a second time unit of the second carrier according to the first time.
14. The method of claim 13,
the determining, by the terminal device, a second time unit of the second carrier according to the first time includes:
and the terminal equipment determines a third time unit of a second carrier according to the first moment, wherein the third time unit is a time unit corresponding to the first moment on the second carrier, and the second time unit is the next time unit of the third time unit.
15. The method of claim 13,
the second time unit is a time unit corresponding to the first time on the second carrier.
16. The method of claim 13,
the first control information further includes a first offset, and the determining, by the terminal device, a second time unit of the second carrier according to the first time includes:
the terminal equipment determines a third time unit of a second carrier according to the first moment, wherein the third time unit is a time unit corresponding to the first moment on the second carrier;
and the terminal equipment determines that the third time unit of the second carrier wave is shifted backwards by the first offset amount to be the second time unit of the second carrier wave.
17. The method of claim 14,
the first control information further includes a first offset,
the terminal equipment determines that a third time unit of the second carrier wave is shifted backwards by the first offset amount to be a fourth time unit of the second carrier wave;
the second time unit is a time unit next to the fourth time unit.
18. The method according to any one of claims 13 to 17,
the first control information further includes a first interval, the method further comprising:
and the terminal equipment transmits data with other terminal equipment on the time unit of the second carrier which is separated from the second time unit by at least one first interval.
19. The method of claim 17,
the third time unit comprises at least one of a subframe, a slot, a minislot, and a symbol;
the fourth time unit includes at least one of a subframe, a slot, a minislot, and a symbol.
20. A terminal device, comprising:
a receiving unit, configured to receive first control information from an access network device at a first time unit of a first carrier;
a determining unit, configured to determine a second time unit of a second carrier according to the first time unit, a first parameter and a first time length, where the first parameter is a preset parameter or a parameter included in the first control information, the first parameter is 0 or a positive integer, the first time length is a time length of the first time unit of the first carrier or a time length of a second time unit of the second carrier, and the time length of the first time unit is different from the time length of the second time unit;
a transmission unit, configured to perform data transmission with the access network device or other terminal devices in a second time unit of the second carrier;
the first time unit comprises at least one of a subframe, a slot, a minislot, and a symbol;
the second time unit comprises at least one of a subframe, a slot, a minislot, and a symbol;
wherein the content of the first and second substances,
the determining unit is configured to determine a second time unit of a second carrier according to the first time unit, the first parameter, and the first time duration, and includes:
the determining unit determines that a first time length backward from the termination time of the first time unit is the first time, and the first time length is the first time length multiplied by the first parameter;
the determining unit determines a second time unit of the second carrier according to the first time.
21. The terminal device of claim 20,
the determining unit determines a second time unit of the second carrier according to the first time, including:
the determining unit determines a third time unit of a second carrier according to the first time, where the third time unit is a time unit corresponding to the first time on the second carrier, and the second time unit is a next time unit of the third time unit.
22. The terminal device of claim 20,
the second time unit is a time unit corresponding to the first time on the second carrier.
23. The terminal device of claim 20,
the first control information further includes a first offset, and the determining unit determines a second time unit of the second carrier according to the first time, including:
the determining unit determines a third time unit of a second carrier according to the first time, wherein the third time unit is a time unit corresponding to the first time on the second carrier;
the determining unit determines that a third time unit of the second carrier is shifted backward by the first offset amount to be a second time unit of the second carrier.
24. The terminal device of claim 21,
the first control information further includes a first offset,
the determining unit determines that a third time unit of the second carrier is shifted backward by the first offset amount to be a fourth time unit of the second carrier;
the second time unit is a time unit next to the fourth time unit.
25. The terminal device according to any of claims 20-24,
the first control information further includes a first interval,
the transmission unit is further configured to perform data transmission with other terminal devices in a time unit of the second carrier that is separated from the second time unit by at least one first interval.
26. The terminal device of claim 24,
the third time unit comprises at least one of a subframe, a slot, a minislot, and a symbol;
the fourth time unit includes at least one of a subframe, a slot, a minislot, and a symbol.
27. A computer-readable storage medium, characterized in that it stores a computer program which, when executed by a computer device, is capable of implementing the method of any one of claims 1 to 6.
28. A computer-readable storage medium, characterized in that it stores a computer program which, when executed by a computer device, is capable of implementing the method of any one of claims 13 to 19.
CN201710183304.XA 2017-03-24 2017-03-24 Data transmission method, terminal equipment and access network equipment Expired - Fee Related CN108633090B (en)

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