CN109391423B - Transmission parameter acquisition method, data transmission method and device - Google Patents

Transmission parameter acquisition method, data transmission method and device Download PDF

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Publication number
CN109391423B
CN109391423B CN201710687140.4A CN201710687140A CN109391423B CN 109391423 B CN109391423 B CN 109391423B CN 201710687140 A CN201710687140 A CN 201710687140A CN 109391423 B CN109391423 B CN 109391423B
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data
communication device
parameter
sending
dmrs
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CN109391423A (en
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薛祎凡
王达
王键
刘云
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to PCT/CN2018/087044 priority patent/WO2019029213A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

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

Abstract

The embodiment of the application provides a transmission parameter obtaining method, a data transmission method and a data transmission device. The transmission parameter acquisition method comprises the following steps: the first communication equipment receives data sent by the second communication equipment, and determines transmission parameters of the data according to the DMRS corresponding to the data, wherein the transmission parameters are used for distinguishing the data received by the first communication equipment. In the transmission parameter acquisition method provided by the embodiment of the application, when receiving data, the first communication device may determine the transmission parameters of the data according to the DMRS corresponding to the data, so that different data may be distinguished according to the transmission parameters of each data. The problem that when the first communication equipment receives a plurality of data simultaneously in an authorization-free data transmission mode, the first communication equipment cannot distinguish the data, and data transmission is affected is solved.

Description

Transmission parameter acquisition method, data transmission method and device
Technical Field
The application relates to the field of communication and provides a transmission parameter acquisition method and a data transmission method and device.
Background
In a conventional communication system, when a terminal device sends data to a network device, a data transmission mode based on authorization is usually adopted. The data transmission mode based on authorization comprises the following processes: the terminal equipment requests the network equipment for an uplink data transmission scheduling permission, and under the condition of acquiring the uplink data transmission scheduling permission, the terminal equipment adopts the transmission resources and the transmission parameters indicated in the scheduling permission to send data to the network equipment, so that the network equipment can correctly decode the data, and the reliability of data transmission is ensured.
The process of acquiring the uplink data transmission scheduling grant by the terminal equipment consumes longer time, and affects the speed of uplink data transmission. To solve this problem, a Grant-free (Grant-free) data transmission scheme is proposed in the fifth Generation mobile communication system (5th Generation, 5G). In the authorization-free data transmission mode, when data needs to be transmitted, the terminal equipment does not need to request uplink data transmission scheduling permission to the network equipment, but selects transmission resources from a pre-configured resource pool to directly transmit the data, so that the data transmission speed is improved.
However, in the unauthorized data transmission method, when the network device receives a plurality of data simultaneously, the network device cannot distinguish each data, which affects the data transmission.
Disclosure of Invention
The embodiment of the application provides a transmission parameter obtaining method and a data transmission method and device, which are used for solving the problem that in an authorization-free data transmission mode, when a network device receives a plurality of data at the same time, the network device cannot distinguish each data, and data transmission is influenced.
In a first aspect, an embodiment of the present application provides a method for acquiring a transmission parameter, which is applied to a first communication device side, and includes:
receiving data sent by second communication equipment; and determining a transmission parameter of the data according to a demodulation reference signal (DMRS) corresponding to the data, wherein the transmission parameter is used for distinguishing the data received by the first communication equipment.
In the process, when the first communication device receives the data, the first communication device can determine the transmission parameters of the data according to the DMRS corresponding to the data, so that different data can be distinguished according to the transmission parameters of the data, and the problem that when the first communication device receives a plurality of data at the same time, the first communication device cannot distinguish the data and the transmission of the data is influenced in an authorization-free data transmission mode is solved
In one possible design, the transmission parameters include: at least one of the identifier of the HARQ process used when the second communication device transmits data, and the number of times the second communication device transmits data.
In one possible design, a first parameter corresponding to the DMRS is used to indicate a transmission parameter, and the first parameter is a parameter used when the second communication device generates the DMRS.
In one possible design, the first parameter corresponding to the DMRS is used to indicate a transmission parameter, and specifically includes:
and a first mapping relation is formed between the first parameter corresponding to the DMRS and the transmission parameter.
In the process, the first parameter is adopted to indicate the transmission parameter, so that compared with the method of directly adopting the DMRS to indicate the transmission parameter, the process of acquiring the transmission parameter according to the DMRS can be simplified, and the acquisition speed of the transmission parameter is improved.
In one possible design, the first parameter corresponding to the DMRS is used to indicate the number of times the second communication device transmits data, and the first parameter is a parameter used when the second communication device generates the DMRS.
In one possible design, the first parameter corresponding to the DMRS is used to indicate the number of times that the second communication device transmits data, and the method specifically includes:
a second mapping relation is formed between the first parameter corresponding to the DMRS and the transmission times of the data transmitted by the second communication equipment;
the identifier of the HARQ process and the resource occupied by the second communication equipment for sending the data under the first sending times have a corresponding relation;
and the resource occupied by the second communication equipment for sending the data under the first sending times is related to the current sending times of the data.
The transmission parameters of the data are determined by determining the current sending times of the data and then determining the HARQ process identification of the second communication equipment for sending the data according to the current sending times of the data, so that the demand for the DMRS is reduced.
In a possible design, if the current sending times of the data are the same as the first sending times, the resources occupied by the second communication device when sending the data at the current sending times are the resources occupied by the second communication device when sending the data at the first sending times.
In a possible design, if the current sending time of the data is different from the first sending time, the resource occupied by the second communication device for sending the data at the first sending time is related to the current sending time of the data, and specifically includes:
the resource occupied by the second communication device for sending the data at the first sending times is related to the resource occupied by the second communication device for sending the data at the current sending times and the sending mode of the data.
In one possible design, before the first communication device receives data sent by the second communication device, the transmission parameter obtaining method further includes:
the first communication device sends to the second communication device at least one of: index value indicating information and a third mapping relation;
the index value indication information comprises an index value which can be adopted by the second communication equipment when the second communication equipment transmits data; the third mapping relationship includes a mapping relationship between the index value and the first parameter.
By determining the index of the first parameter for each first parameter, the amount of transmitted data can be reduced.
In one possible design, the index value indication information includes: a starting index value and a number of index values.
By employing the starting index value and the number of index values to indicate the index values that the second communication device can employ, the amount of transmission data can be reduced.
In one possible design, before the first communication device receives data sent by the second communication device, the transmission parameter obtaining method further includes:
the first communication device sends a first parameter set to the second communication device;
the first parameter set comprises first parameters which can be adopted by the second communication equipment when the second communication equipment sends data.
In one possible design, before the first communication device receives data sent by the second communication device, the transmission parameter obtaining method further includes:
the first communication device sends the first mapping relation to the second communication device.
In one possible design, before the first communication device receives data sent by the second communication device, the transmission parameter obtaining method further includes:
and the first communication equipment sends the second mapping relation to the second communication equipment.
In one possible design, the first parameter is used to indicate a pseudo-random sequence on which the DMRS is based; or
The first parameter is used to indicate a cyclic shift value of the DMRS.
In one possible design, the sending, by the first communication device, the first mapping relationship to the second communication device specifically includes:
the first communication device broadcasts/multicasts a first mapping relation; or
The first communication device sends the first mapping relationship to the second communication device using the second communication device specific signaling.
In a possible design, the sending, by the first communication device, the second mapping relationship to the second communication device specifically includes:
the first communication device broadcasts/multicasts a second mapping relation; or
The first communication device sends the second mapping relationship to the second communication device using the second communication device specific signaling.
The transmission mode of the mapping relation can be simplified by broadcasting/multicasting the mapping relation. By adopting the specific signaling sending of the second communication equipment, the situation that other second communication equipment receives irrelevant information is avoided.
In a second aspect, an embodiment of the present application further provides a data transmission method, applied to a second network device side, including:
determining a DMRS corresponding to data according to transmission parameters of the data to be transmitted; transmitting data and a DMRS corresponding to the data to a first communication device; wherein the transmission parameter is used for the first communication device to distinguish the received data.
In one possible design, the transmission parameters include: at least one of an identifier of an HARQ process used when transmitting data and a current number of times of transmission of data.
In one possible design, the transmission parameter is used to indicate a first parameter corresponding to the DMRS, and the first parameter is a parameter used when the DMRS is generated.
In one possible design, the transmission parameter is used to indicate a first parameter corresponding to a DMRS, and specifically includes:
the transmission parameter and a first parameter corresponding to the DMRS have a first mapping relation.
In one possible design, the current number of times of transmission of the data is used to indicate a first parameter corresponding to the DMRS, where the first parameter is a parameter used when the DMRS is generated.
In one possible design, the current transmission frequency of the data is used to indicate a first parameter corresponding to the DMRS, and the method specifically includes:
a second mapping relation exists between the current transmission times of the data and the first parameters corresponding to the DMRS;
the method for transmitting data and the DMRS corresponding to the data to the first communication device includes:
transmitting data and a DMRS corresponding to the data to a first communication device on a first resource;
wherein the first resource is related to a resource occupied by transmitting data at the first transmission times; the resource occupied by transmitting data at the first transmission times is related to the identification of the HARQ process.
In one possible design, if the current number of times of sending the data is the same as the first number of times of sending, the first resource is a resource occupied by sending the data at the first number of times of sending.
In one possible design, if the current number of transmissions of the data is different from the first number of transmissions; the first resource is related to a resource occupied by sending data for a first sending time, and specifically includes:
the first resource is related to the current sending times of the data, the resource occupied by sending the data under the first sending times and the sending mode of the data.
In one possible design, before determining the DMRS corresponding to the data according to the transmission parameter of the data to be transmitted, the data transmission method further includes:
receiving at least one of the following sent by the first communication device: index value indicating information and a third mapping relation;
the index value indication information comprises an index value which can be adopted when data is transmitted; the third mapping relationship includes a mapping relationship between the index value and the first parameter.
In one possible design, the index value indication information includes: a starting index value and a number of index values.
In one possible design, before determining the DMRS corresponding to the data according to the transmission parameter of the data to be transmitted, the data transmission method further includes:
receiving a first parameter set sent by a first communication device;
the first parameter set comprises first parameters which can be adopted when uplink data is sent.
In one possible design, before determining the DMRS corresponding to the data according to the transmission parameter of the data to be transmitted, the data transmission method further includes:
and receiving a first mapping relation sent by the first communication equipment.
In one possible design, before determining the DMRS corresponding to the data according to the transmission parameter of the data to be transmitted, the data transmission method further includes:
and receiving the second mapping relation sent by the first communication equipment.
In one possible design, the first parameter is used to indicate a pseudo-random sequence on which the DMRS is based; or
The first parameter is used to indicate a cyclic shift value of the DMRS.
In one possible design, before determining the DMRS corresponding to the data according to the transmission parameter of the data to be transmitted, the data transmission method further includes:
receiving a first mapping relation broadcast/multicast by first communication equipment; or
And receiving a first mapping relation sent by the first communication device by using specific signaling.
In one possible design, before the first communication device receives the data sent by the second communication device, the data transmission method further includes:
receiving a second mapping relation of the broadcast/multicast of the first communication equipment; or
And receiving a second mapping relation sent by the first communication device by using the specific signaling.
In a third aspect, in order to implement the transmission parameter obtaining method of the first aspect, an embodiment of the present application provides a transmission parameter obtaining apparatus, where as a first communication device, the transmission parameter obtaining apparatus has a function of implementing the transmission parameter obtaining method. The function can be realized by hardware, and can also be realized by executing corresponding software by hardware. The hardware or software herein includes one or more modules corresponding to the functions described above.
In a possible implementation manner of the third aspect, the transmission parameter obtaining device includes:
the receiving module is used for receiving data sent by the second communication equipment;
and the transmission parameter acquisition module is used for determining the transmission parameters of the data according to the demodulation reference signal DMRS corresponding to the data, and the transmission parameters are used for distinguishing the data received by the first communication equipment.
In one possible design, the transmission parameters include: at least one of the identifier of the HARQ process used when the second communication device transmits data, and the number of times the second communication device transmits data.
In one possible design, a first parameter corresponding to the DMRS is used to indicate a transmission parameter, and the first parameter is a parameter used when the second communication device generates the DMRS.
In one possible design, the first parameter corresponding to the DMRS is used to indicate a transmission parameter, and specifically includes:
and a first mapping relation is formed between the first parameter corresponding to the DMRS and the transmission parameter.
In one possible design, the first parameter corresponding to the DMRS is used to indicate the number of times the second communication device transmits data, and the first parameter is a parameter used when the second communication device generates the DMRS.
In one possible design, the first parameter corresponding to the DMRS is used to indicate the number of times that the second communication device transmits data, and the method specifically includes:
a second mapping relation is formed between the first parameter corresponding to the DMRS and the transmission times of the data transmitted by the second communication equipment;
the identifier of the HARQ process and the resource occupied by the second communication equipment for sending the data under the first sending times have a corresponding relation;
the resource occupied by the second communication equipment for sending the data under the first sending times is related to the current sending times of the data;
the first parameter is a parameter adopted when the second communication device generates the DMRS.
In a possible design, if the current sending times of the data are the same as the first sending times, the resources occupied by the second communication device when sending the data at the current sending times are the resources occupied by the second communication device when sending the data at the first sending times.
In a possible design, if the current sending time of the data is different from the first sending time, the resource occupied by the second communication device for sending the data at the first sending time is related to the current sending time of the data, and specifically includes:
the resource occupied by the second communication device for sending the data at the first sending times is related to the resource occupied by the second communication device for sending the data at the current sending times and the sending mode of the data.
In one possible design, the transmission parameter obtaining apparatus further includes:
a sending module, configured to send, to the second communication device, at least one of: index value indicating information and a third mapping relation;
the index value indication information comprises an index value which can be adopted by the second communication equipment when the second communication equipment transmits data; the third mapping relationship includes a mapping relationship between the index value and the first parameter.
In one possible design, the index value indication information includes: a starting index value and a number of index values.
In one possible design, the transmission parameter obtaining apparatus further includes:
a sending module, configured to send a first parameter set to a second communication device;
the first parameter set comprises first parameters which can be adopted by the second communication equipment when the second communication equipment sends data.
In one possible design, the transmission parameter obtaining apparatus further includes:
and the sending module is used for sending the first mapping relation to the second communication equipment.
In one possible design, the transmission parameter obtaining apparatus further includes:
and the sending module is used for sending the second mapping relation to the second communication equipment.
In one possible design, the first parameter is used to indicate a pseudo-random sequence on which the DMRS is based; or
The first parameter is used to indicate a cyclic shift value of the DMRS.
In one possible design, the sending module is specifically configured to broadcast/multicast the first mapping relationship; or sending the first mapping relation to the second communication device by using the specific signaling of the second communication device.
In one possible design, the sending module is specifically configured to broadcast/multicast the second mapping relationship; or sending the second mapping relationship to the second communication device using second communication device specific signaling.
The beneficial effects of the methods provided by the third aspect and the possible designs of the third aspect may be referred to the beneficial effects of the possible designs of the first aspect, and are not described herein again.
In a fourth aspect, in order to implement the data transmission method of the second aspect, an embodiment of the present application provides a data transmission apparatus, which serves as a second communication device, and has a function of implementing the data transmission method. The function can be realized by hardware, and can also be realized by executing corresponding software by hardware. The hardware or software herein includes one or more modules corresponding to the functions described above.
In a possible implementation manner of the fourth aspect, the data transmission apparatus includes:
the DMRS determining module is used for determining the DMRS corresponding to the data according to the transmission parameters of the data to be transmitted;
the device comprises a transmitting module, a receiving module and a transmitting module, wherein the transmitting module is used for transmitting data and the DMRS corresponding to the data to first communication equipment; wherein the transmission parameter is used for the first communication device to distinguish the received data.
In one possible design, the transmission parameters include: at least one of an identifier of an HARQ process used when transmitting data and a current number of times of transmission of data.
In one possible design, the transmission parameter is used to indicate a first parameter corresponding to the DMRS, and the first parameter is a parameter used when the DMRS is generated.
In one possible design, the transmission parameter is used to indicate a first parameter corresponding to a DMRS, and specifically includes:
the transmission parameter and a first parameter corresponding to the DMRS have a first mapping relation.
In one possible design, the current number of times of transmission of the data is used to indicate a first parameter corresponding to the DMRS, where the first parameter is a parameter used when the DMRS is generated.
In one possible design, the current transmission frequency of the data is used to indicate a first parameter corresponding to the DMRS, and the method specifically includes:
a second mapping relation exists between the current transmission times of the data and the first parameters corresponding to the DMRS;
the method for transmitting data and the DMRS corresponding to the data to the first communication device includes:
transmitting data and a DMRS corresponding to the data to a first communication device on a first resource;
wherein the first resource is related to a resource occupied by transmitting data at the first transmission times; the resource occupied by transmitting data at the first transmission times is related to the identification of the HARQ process.
In one possible design, if the current number of times of sending the data is the same as the first number of times of sending, the first resource is a resource occupied by sending the data at the first number of times of sending.
In one possible design, if the current number of transmissions of the data is different from the first number of transmissions; the first resource is related to a resource occupied by sending data for a first sending time, and specifically includes:
the first resource is related to the current sending times of the data, the resource occupied by sending the data under the first sending times and the sending mode of the data.
In one possible design, the data transmission device further includes:
a receiving module, configured to receive at least one of the following sent by the first communication device: index value indicating information and a third mapping relation;
the index value indication information comprises an index value which can be adopted when data is transmitted; the third mapping relationship includes a mapping relationship between the index value and the first parameter.
In one possible design, the index value indication information includes: a starting index value and a number of index values.
In one possible design, the data transmission device further includes:
the receiving module is used for receiving a first parameter set sent by first communication equipment;
the first parameter set comprises first parameters which can be adopted when uplink data is sent.
In one possible design, the data transmission device further includes:
the receiving module is used for receiving the first mapping relation sent by the first communication equipment.
In one possible design, the data transmission device further includes:
and the receiving module is used for receiving the second mapping relation sent by the first communication equipment.
In one possible design, the first parameter is used to indicate a pseudo-random sequence on which the DMRS is based; or
The first parameter is used to indicate a cyclic shift value of the DMRS.
In one possible design, the data transmission device further includes:
a receiving module, configured to receive a first mapping relationship of broadcast/multicast of a first communication device; or
And receiving a first mapping relation sent by the first communication device by using specific signaling.
In one possible design, the data transmission device further includes:
a receiving module, configured to receive a second mapping relationship of broadcast/multicast of the first communication device; or
And receiving a second mapping relation sent by the first communication device by using the specific signaling.
The beneficial effects of the methods provided by the fourth aspect and the possible designs of the fourth aspect may refer to the beneficial effects brought by the possible designs of the second aspect, and are not described herein again.
In a fifth aspect, in order to implement the transmission parameter obtaining method of the first aspect, an embodiment of the present application provides a communication device, which serves as a first communication device and has a function of implementing the transmission parameter obtaining method. The function can be realized by hardware, and can also be realized by executing corresponding software by hardware. The hardware or software herein includes one or more modules corresponding to the functions described above.
In one possible implementation manner of the fifth aspect, the communication device includes:
the receiver is used for receiving data sent by the second communication equipment;
and the processor is used for determining a transmission parameter of the data according to the demodulation reference signal DMRS corresponding to the data, wherein the transmission parameter is used for distinguishing the data received by the first communication equipment.
In one possible design, the transmission parameters include: at least one of the identifier of the HARQ process used when the second communication device transmits data, and the number of times the second communication device transmits data.
In one possible design, a first parameter corresponding to the DMRS is used to indicate a transmission parameter, and the first parameter is a parameter used when the second communication device generates the DMRS.
In one possible design, the first parameter corresponding to the DMRS is used to indicate a transmission parameter, and specifically includes:
and a first mapping relation is formed between the first parameter corresponding to the DMRS and the transmission parameter.
In one possible design, the first parameter corresponding to the DMRS is used to indicate the number of times the second communication device transmits data, and the first parameter is a parameter used when the second communication device generates the DMRS.
In one possible design, the first parameter corresponding to the DMRS is used to indicate the number of times that the second communication device transmits data, and the method specifically includes:
a second mapping relation is formed between the first parameter corresponding to the DMRS and the transmission times of the data transmitted by the second communication equipment;
the identifier of the HARQ process and the resource occupied by the second communication equipment for sending the data under the first sending times have a corresponding relation;
the resource occupied by the second communication equipment for sending the data under the first sending times is related to the current sending times of the data;
the first parameter is a parameter adopted when the second communication device generates the DMRS.
In a possible design, if the current sending times of the data are the same as the first sending times, the resources occupied by the second communication device when sending the data at the current sending times are the resources occupied by the second communication device when sending the data at the first sending times.
In a possible design, if the current sending time of the data is different from the first sending time, the resource occupied by the second communication device for sending the data at the first sending time is related to the current sending time of the data, and specifically includes:
the resource occupied by the second communication device for sending the data at the first sending times is related to the resource occupied by the second communication device for sending the data at the current sending times and the sending mode of the data.
In one possible design, the communication device further includes:
a transmitter for transmitting to the second communication device at least one of: index value indicating information and a third mapping relation;
the index value indication information comprises an index value which can be adopted by the second communication equipment when the second communication equipment transmits data; the third mapping relationship includes a mapping relationship between the index value and the first parameter.
In one possible design, the index value indication information includes: a starting index value and a number of index values.
In one possible design, the communication device further includes:
a transmitter for transmitting a first set of parameters to a second communication device;
the first parameter set comprises first parameters which can be adopted by the second communication equipment when the second communication equipment sends data.
In one possible design, the communication device further includes:
a transmitter, configured to transmit the first mapping relationship to the second communication device.
In one possible design, the communication device further includes:
and the transmitter is used for transmitting the second mapping relation to the second communication equipment.
In one possible design, the first parameter is used to indicate a pseudo-random sequence on which the DMRS is based; or
The first parameter is used to indicate a cyclic shift value of the DMRS.
In one possible design, the transmitter is specifically configured to broadcast/multicast the first mapping; or sending the first mapping relation to the second communication device by using the specific signaling of the second communication device.
In one possible design, the transmitter is specifically configured to broadcast/multicast the second mapping; or sending the second mapping relationship to the second communication device using second communication device specific signaling.
The beneficial effects of the methods provided by the fifth aspect and the possible designs of the fifth aspect can be referred to the beneficial effects of the possible designs of the first aspect, and are not described herein again.
In a sixth aspect, in order to implement the data transmission method of the second aspect, an embodiment of the present application provides a communication device, as a second communication device, having a function of implementing the data transmission method. The function can be realized by hardware, and can also be realized by executing corresponding software by hardware. The hardware or software herein includes one or more modules corresponding to the functions described above.
In one possible implementation manner of the sixth aspect, the communication device includes:
the processor is used for determining the DMRS corresponding to the data according to the transmission parameters of the data to be transmitted;
a transmitter, configured to transmit data and a DMRS corresponding to the data to a first communication device; wherein the transmission parameter is used for the first communication device to distinguish the received data.
In one possible design, the transmission parameters include: at least one of an identifier of an HARQ process used when transmitting data and a current number of times of transmission of data.
In one possible design, the transmission parameter is used to indicate a first parameter corresponding to the DMRS, and the first parameter is a parameter used when the DMRS is generated.
In one possible design, the transmission parameter is used to indicate a first parameter corresponding to a DMRS, and specifically includes:
the transmission parameter and a first parameter corresponding to the DMRS have a first mapping relation.
In one possible design, the current number of times of transmission of the data is used to indicate a first parameter corresponding to the DMRS, where the first parameter is a parameter used when the DMRS is generated.
In one possible design, the current transmission frequency of the data is used to indicate a first parameter corresponding to the DMRS, and the method specifically includes:
a second mapping relation exists between the current transmission times of the data and the first parameters corresponding to the DMRS;
the method for transmitting data and the DMRS corresponding to the data to the first communication device includes:
transmitting data and a DMRS corresponding to the data to a first communication device on a first resource;
wherein the first resource is related to a resource occupied by transmitting data at the first transmission times; the resource occupied by transmitting data at the first transmission times is related to the identification of the HARQ process.
In one possible design, if the current number of times of sending the data is the same as the first number of times of sending, the first resource is a resource occupied by sending the data at the first number of times of sending.
In one possible design, if the current number of transmissions of the data is different from the first number of transmissions; the first resource is related to a resource occupied by sending data for a first sending time, and specifically includes:
the first resource is related to the current sending times of the data, the resource occupied by sending the data under the first sending times and the sending mode of the data.
In one possible design, the communication device further includes:
a receiver for receiving at least one of the following sent by the first communication device: index value indicating information and a third mapping relation;
the index value indication information comprises an index value which can be adopted when data is transmitted; the third mapping relationship includes a mapping relationship between the index value and the first parameter.
In one possible design, the index value indication information includes: a starting index value and a number of index values.
In one possible design, the communication device further includes:
a receiver for receiving a first set of parameters transmitted by a first communication device;
the first parameter set comprises first parameters which can be adopted when uplink data is sent.
In one possible design, the communication device further includes:
and the receiver is used for receiving the first mapping relation sent by the first communication equipment.
In one possible design, the communication device further includes:
and the receiver is used for receiving the second mapping relation sent by the first communication equipment.
In one possible design, the first parameter is used to indicate a pseudo-random sequence on which the DMRS is based; or
The first parameter is used to indicate a cyclic shift value of the DMRS.
In one possible design, the communication device further includes:
a receiver, configured to receive a first mapping relationship broadcasted/multicasted by a first communication device; or
And receiving a first mapping relation sent by the first communication device by using specific signaling.
In one possible design, the communication device further includes:
a receiver, configured to receive a second mapping relationship of broadcast/multicast of the first communication device; or
And receiving a second mapping relation sent by the first communication device by using the specific signaling.
The beneficial effects of the methods provided by the above sixth aspect and the possible designs of the sixth aspect can be referred to the beneficial effects of the above possible designs of the second aspect, and are not described herein again.
In a seventh aspect, an embodiment of the present application provides a computer-readable storage medium for storing computer software instructions for the first communication device, which includes a program for executing the first method.
In an eighth aspect, an embodiment of the present application provides a computer-readable storage medium for storing computer software instructions for the second communication device, which includes a program for executing the second aspect.
In a ninth aspect, the present application provides a computer program product, which contains instructions, when the computer program is executed by a computer, the instructions make the computer perform the functions performed by the first communication device in the first aspect.
In a tenth aspect, embodiments of the present application provide a computer program product, which contains instructions that, when the computer program is executed by a computer, cause the computer to perform the functions performed by the second communication device in the second aspect.
In an eleventh aspect, embodiments of the present application further provide a chip system, where the chip system includes a processor, configured to support a network device to implement the functions referred to in the first aspect, for example, to generate or process data and/or information referred to in the foregoing method. In one possible design, the system-on-chip further includes a memory for storing necessary program instructions and data for the first communication device. The chip system may be constituted by a chip, or may include a chip and other discrete devices.
In a twelfth aspect, the present application further provides a chip system, where the chip system includes a processor, configured to support a terminal device to implement the functions recited in the second aspect, for example, to generate or process data and/or information recited in the foregoing method. In one possible design, the system-on-chip further includes a memory for storing program instructions and data necessary for the second communication device. The chip system may be constituted by a chip, or may include a chip and other discrete devices.
In a thirteenth aspect, the present application provides a data transmission system, comprising the first communication device according to the third aspect and the second communication device according to the fourth aspect.
Drawings
FIG. 1 illustrates a network architecture to which embodiments of the present application may be applied;
fig. 2 is a schematic flowchart of a transmission parameter obtaining method according to an embodiment of the present application;
fig. 3 is a schematic flowchart of a transmission parameter obtaining method according to a second embodiment of the present application;
fig. 4 is a schematic flowchart of a transmission parameter obtaining method according to a third embodiment of the present application;
fig. 5 is a schematic flowchart of a transmission parameter obtaining method according to a fourth embodiment of the present application;
fig. 6 is a schematic diagram illustrating a resource occupation situation in a transmission parameter acquisition method according to a fourth embodiment of the present application;
fig. 7 is a schematic flowchart of a data transmission method according to an embodiment of the present application;
fig. 8 is a schematic structural diagram of a transmission parameter acquisition apparatus according to an embodiment of the present application;
fig. 9 is a schematic structural diagram of a data transmission device according to an embodiment of the present application;
fig. 10 is a schematic structural diagram of a communication device according to an embodiment of the present application.
Detailed Description
The network architecture and the service scenario described in the embodiment of the present application are for more clearly illustrating the technical solution of the embodiment of the present application, and do not form a limitation on the technical solution provided in the embodiment of the present application, and as a person of ordinary skill in the art knows that along with the evolution of the network architecture and the appearance of a new service scenario, the technical solution provided in the embodiment of the present application is also applicable to similar technical problems.
A possible network architecture of an embodiment of the present application is described below with reference to fig. 1. Fig. 1 illustrates a network architecture to which embodiments of the present application may be applied. As shown in fig. 1, the network architecture provided by the present embodiment includes a network device 10 and at least one terminal device 20.
The network device 10 is a device for accessing a terminal device to a wireless network, and may be an evolved Node B (eNB or eNodeB) in an LTE communication system, or a relay station or an access point, or a base station in a future 5G network, or a macro base station, a micro base station, a hot spot, a home base station, a transmission point, and the like, which is not limited herein. Fig. 1 schematically illustrates a possible example, which is illustrated by taking the network device as a base station.
Terminal device 20 may be a wireless terminal, which may be a device that provides voice and/or other traffic data connectivity to a user, a handheld device having wireless connection functionality, or other processing device connected to a wireless modem. A wireless terminal, which may be a mobile terminal such as a mobile phone (or "cellular" phone), a notebook computer, a bracelet, a smart watch, a data card, a sensor, and a computer having a mobile terminal, for example, a portable, pocket, hand-held, computer-included, or vehicle-mounted mobile device, may communicate with one or more core networks via a Radio Access Network (RAN), and may exchange language and/or data with the RAN. For example, devices such as Personal Communication Service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, and Personal Digital Assistants (PDAs) are used. The wireless Terminal may also be referred to as a system, a Subscriber Unit (Subscriber Unit), a Subscriber Station (Subscriber Station), a Mobile Station (Mobile), a Remote Station (Remote Station), a Remote Terminal (Remote Terminal), an Access Terminal (Access Terminal), a User Terminal (User Terminal), and a User Agent (User Agent), which are not limited herein. Fig. 1 schematically depicts a possible illustration, which is shown by way of example of the terminal device being a mobile telephone. Illustratively, for a network architecture in which a sidelink exists, such as bracelet-handset-base station, the bracelet may also be considered as terminal device 20 and the handset as a network device.
In a conventional communication system, when a terminal device sends data to a network device, a data transmission mode based on authorization is usually adopted. In the data transmission mode based on authorization, before transmitting uplink data, the terminal device needs to perform multiple rounds of signaling interaction with the network device, so as to obtain dedicated resources required for transmitting the uplink data and transmission parameters of the uplink data from the network device side. The network equipment transmits uplink data on the special resource, so that interference can be avoided, and the transmission reliability is ensured. Meanwhile, the terminal equipment adopts the transmission resources and transmission parameters specified by the network equipment, so that the network equipment can correctly distinguish different data.
However, the process of signaling interaction between the terminal device and the network device takes a long time, which affects the speed of uplink data transmission. To solve this problem, a Grant-free (Grant-free) data transmission method is proposed in the fifth Generation mobile communication system (5th Generation, 5G). In the authorization-free data transmission mode, when data needs to be transmitted, the terminal equipment does not need to request uplink data transmission scheduling permission to the network equipment, but selects transmission resources from a pre-configured resource pool to directly transmit the data, so that the data transmission speed is improved. However, in the unauthorized data transmission method, when the network device receives a plurality of data simultaneously, the network device cannot distinguish each data, which affects the data transmission.
In order to solve the problem that the network device cannot distinguish each data and affects data transmission, embodiments of the present application provide a transmission parameter acquisition method and a data transmission method. In the transmission parameter acquisition method, when receiving data sent by the second communication device, the first communication device determines the transmission parameters of the data according to the DMRS corresponding to the data, so that each data can be distinguished. In the data transmission method, the second communication equipment generates the DMRS according to the transmission parameters of the data and sends the DMRS and the data to the first communication equipment, so that the first communication equipment can conveniently determine the transmission parameters of the data according to the DMRS corresponding to the data, and the data can be distinguished.
The following describes the transmission parameter obtaining method and the data transmission method provided by the present application in detail with reference to specific embodiments. In the following several embodiments, the same or similar concepts or processes may not be described in detail in some embodiments.
An embodiment of the present application provides a method for acquiring a transmission parameter. Fig. 2 is a flowchart illustrating a transmission parameter obtaining method according to an embodiment of the present application. The method is performed by a first communication device, such as a network device. The embodiment relates to a method for determining data transmission parameters according to a DMRS (demodulation reference signal) corresponding to data when first communication equipment receives the data transmitted by second communication equipment. Illustratively, as shown in fig. 2, the method includes:
s201, receiving data sent by the second communication equipment.
For example, the first communication device receives data sent by at least one second communication device, and/or the first communication device receives a plurality of data transmitted on one second communication device. The data transmission adopts an authorization-free data transmission mode, so that the first communication equipment cannot indicate the transmission parameters of all data to the second communication equipment before the second communication equipment sends the data, and further cannot distinguish all data.
S202, determining transmission parameters of the data according to the DMRS corresponding to the data, wherein the transmission parameters are used for distinguishing the data received by the first communication equipment.
For example, when data is transmitted between a first communication device and a second communication device, a transmission path between the first communication device and the second communication device may affect the data. In order to determine the influence of a transmission channel between the first communication device and the second communication device on data in transmission, the second communication device receives the DMRS corresponding to the data first, and then can process the data signal sent by the first communication device according to the influence of the transmission channel on the DMRS, so that the error rate of data demodulation is reduced. Accordingly, different DMRSs may be allocated to different data so that the first communication device may identify different data according to the different DMRSs.
The transmission parameter obtaining method provided by the embodiment of the application comprises the following steps: the first communication equipment receives data sent by the second communication equipment, and determines transmission parameters of the data according to the DMRS corresponding to the data, wherein the transmission parameters are used for distinguishing the data received by the first communication equipment. In the embodiment of the application, when receiving data, the first communication device may determine the transmission parameter of the data according to the DMRS corresponding to the data, so that different data may be distinguished according to the transmission parameter of each data. The problem that when the first communication equipment receives a plurality of data simultaneously in an authorization-free data transmission mode, the first communication equipment cannot distinguish the data, and data transmission is affected is solved.
Optionally, on the basis of the foregoing embodiment, the transmission parameters include: at least one of the identifier of the HARQ process used when the second communication device transmits data, and the number of times the second communication device transmits data.
For example, when the second communication device has data to be transmitted, in order to ensure reliability of data transmission, an HARQ technique may be used. Specifically, the second communication device starts a HARQ process to transmit the data. The HARQ technology is a technology formed by combining a forward error correction coding (FEC) technology and an Automatic Repeat reQuest (ARQ) technology.
In the FEC technique, redundant information is added to transmitted data, so that a receiving end of the data (i.e., a first communication device) can correct a part of errors when receiving the data and the redundant information, thereby reducing the number of data retransmissions. In the ARQ technique, for an error that cannot be corrected by FEC, the receiving end requests the transmitting end (i.e. the second communication device) to retransmit data through an ARQ mechanism. The receiving end uses an error detection code, typically a CRC check, to detect whether the received data packet is erroneous. If there is no error, the receiving end will send a positive Acknowledgement (ACK) to the sending end, and after the sending end receives the ACK, the sending end will send the next data packet. If there is an error, the receiving end discards the data packet and sends a Negative Acknowledgement (NACK) to the transmitting end, and the transmitting end retransmits the same data after receiving the NACK. In the HARQ technology, it is considered that the discarded packet contains useful information although it cannot be decoded correctly. Therefore, the received error data packet can be stored in an HARQ buffer, and the sender is requested to retransmit the error data packet and combine the error data packet with the subsequently received retransmission data packet, so as to obtain a data packet more reliable than the single decoding (this process is called a soft combining process). And then decoding the combined data packet, and if the decoding fails, repeating the process of 'requesting retransmission and then performing soft combining' until the decoding is successful or the maximum retransmission times K of the data is reached, wherein K is an integer larger than 1.
In the data transmission process, the HARQ process uses a stop-and-wait protocol to transmit data, that is, after transmitting a piece of data, the HARQ process stops to wait for the acknowledgement information fed back by the receiving end. Since the process of waiting for the acknowledgement information may take a long time, the transmitting end of the data may use a plurality of parallel HARQ processes. When multiple parallel HARQ processes are used for data transmission, the receiving end needs to determine which HARQ process of the transmitting end the received data comes from. Illustratively, a HARQ process number (HPN, also referred to as HARQ process ID) may be used to uniquely identify one HARQ process.
Thus, the transmission parameter may be an identification of the HARQ process employed when the second communication device transmits data. The first communication device determines the transmission parameter of the data according to the DMRS, and may determine, for the first communication device according to the DMRS, an identifier of an HARQ process used when the second communication device transmits the data.
Meanwhile, it is considered that when the second communication device transmits data on one HARQ process, the data may be repeatedly transmitted K times. The first communication device needs to determine which transmission the received data is, i.e. the number of times the second communication device sends the data, i.e. the current number of times the data is sent. Therefore, the transmission parameter may also be the number of transmissions of the second communication device to transmit data. The first communication device determines a transmission parameter of the data according to the DMRS, and may determine, for the first communication device, the number of transmissions of the data by the second communication device according to the DMRS.
Further, on the basis of the embodiment shown in fig. 2, the embodiment of the present application further provides a transmission parameter obtaining method. In this embodiment, a manner of determining a transmission parameter based on a DMRS will be described in detail. In this embodiment, the first parameter corresponding to the DMRS is used to indicate a transmission parameter, and the first parameter is a parameter used when the second communication device generates the DMRS.
Correspondingly, fig. 3 is a schematic flow chart of a transmission parameter obtaining method according to the second embodiment of the present application. As shown in fig. 3, the method for acquiring transmission parameters in this embodiment includes:
s301, the first communication device receives data sent by the second communication device.
S301 is the same as S201 in the embodiment shown in fig. 2, and is not described herein again.
S302, the first communication equipment determines a first parameter according to the DMRS corresponding to the data; the first parameter is a parameter employed when the second communication device generates the DMRS.
For example, when data is transmitted between the first communication device and the second communication device, two waveforms of DFT-s-OFDM and CP-OFDM can be adopted. Correspondingly, the two different waveforms correspond to different DMRSs.
When data transmission employs discrete fourier transform-Spread-Orthogonal Frequency Division Multiplexing (DFT-s-OFDM) Spread spectrum, DMRS sequences are exemplarily generated according to a Zadoff Chu base sequence. Specifically, the DMRS sequence is generated from a base sequence R1. Different DMRSs are different cyclically shifted sequences of the base sequence.
Illustratively, the sequence used for the DMRS is R1 cyclic shifted sequence R1αWherein alpha is a cyclic displacement value, wherein,
Figure BDA0001377029460000121
pi is the circumference ratio, NcsThe minimum granularity of the cyclic shift is related to the working frequency band, the subcarrier spacing and the like.
Figure BDA0001377029460000122
Exemplary related to cell-specific configuration parameters, current OFDM symbol (or slot number, or subframe number), subcarrier spacing, etc. For example, all parameters of the second communication device for uplink unlicensed data transmission using DFT-s-OFDM waveform on the same OFDM symbol using the same subcarrier spacing in the same cell
Figure BDA0001377029460000131
The same is true.
Figure BDA0001377029460000132
A parameter specific to the second communication device is called a first parameter.
Figure BDA0001377029460000133
Is a set that is configured by the first communication device to the second communication device.
When the data transmission employs Cyclic Prefix orthogonal frequency division multiplexing multiple access technology (CP-OFDM), the DMRS sequence is illustratively generated from a base sequence R2(c (·)). Where c (-) is a pseudo-random sequence, different DMRSs are distinguished by different pseudo-random sequences. The pseudo-random sequence c (-) can illustratively be a gold sequence,from two pseudo-random sequences x1(. and x)2(. cndot.) to produce. Wherein x1The initialization parameter of (c) is a fixed value, x2Initialization parameter c ofinitCan be according to formula cinit＝n(1)+n(2)And (4) obtaining. n is(2)Is determined by one or more parameters, such as cell-specific configuration parameters, the current OFDM symbol (or slot number, or subframe number), subcarrier spacing, etc. For example, the parameter n of all the second communication devices using the same subcarrier spacing for uplink unlicensed data transmission on the same symbol using the CP-OFDM waveform in the same cell(2)The same is true. n is(1)The parameter specific to the second communication device may also be referred to as the first parameter. n is(1)Is a set that is configured by the first communication device to the second communication device.
Illustratively, the first parameter is used to indicate a pseudo-random sequence on which the DMRS is based; or a cyclic shift value for indicating DMRS. Since the DMRSs can be determined according to the first parameter, the first communication device may determine the first parameter value after determining the DMRSs corresponding to the data.
And S303, the first communication equipment determines the transmission parameters of the data according to the first parameters.
Illustratively, different DMRSs are used for different data, and the DMRSs correspond to the first parameters one to one, so that a process of determining the transmission parameters of the data according to the DMRSs by the first communication device is equivalent to a process of determining the transmission parameters of the data according to the first parameters. Exemplarily, when the transmission parameter is an identifier of an HARQ process used by the second communication device when transmitting data, the first communication device determines the identifier of the HARQ process according to the first parameter; and when the transmission parameter is the sending times of the data sent by the second communication equipment, the first communication equipment determines the current sending times of the data according to the first parameter.
In the method for acquiring transmission parameters provided in this embodiment, the first communication device determines, according to the DMRS, a first parameter for generating the DMRS, and then determines the transmission parameter according to the first parameter. By adopting the first parameter to indicate the transmission parameter, compared with directly adopting the DMRS to indicate the transmission parameter, the process of acquiring the transmission parameter according to the DMRS can be simplified, and the acquisition speed of the transmission parameter is improved.
Further, on the basis of the embodiment shown in fig. 3, the embodiment of the present application further provides a transmission parameter obtaining method. In this embodiment, a first mapping relationship exists between a first parameter corresponding to the DMRS and the transmission parameter. Correspondingly, the determining, by the first communication device, the transmission parameter of the data according to the DMRS corresponding to the data specifically includes:
the first communication equipment determines a first parameter according to the DMRS corresponding to the data, and determines a transmission parameter according to the first parameter and the first mapping relation.
Illustratively, the first parameter has a first mapping relationship with the transmission parameter, the transmission parameter is used as an identifier of the HARQ process, and the first parameter is
Figure BDA0001377029460000134
For example, the first mapping relationship may be as shown in table 1 below. The first communication device may perform, after determining the first parameter according to the DMRS, a search in table 1 according to the first parameter, to obtain a transmission parameter corresponding to the DMRS. When the transmission parameter is the number of data transmissions, the first mapping relationship is similar to table 1, and is not described in detail herein. For CP-OFDM waveforms, the first parameter is n(1)The first mapping relation and the first parameter are
Figure BDA0001377029460000135
The first mapping relationships are similar. The first parameter in the following embodiments of the present application is as follows
Figure BDA0001377029460000136
For example, a detailed description will be given of a method for acquiring a transmission parameter, where n is a first parameter(1)The details are not described.
It should be noted that the values of the first parameters of different second communication devices may be different, so that the first communication device may determine the first parameter according to the DMRS, and may also determine the second communication device that transmits the data and the corresponding DMRS according to the DMRS.
The first mapping relationship may be an agreed mapping relationship in a communication standard, or may be preconfigured for the first communication device. Optionally, the first communication device sends the first mapping relationship to the second communication device. For example, the first communication device sends the first mapping relationship to the second communication device before receiving the data, and sends the updated first mapping relationship to the second communication device when the first mapping relationship is updated.
TABLE 1
Figure BDA0001377029460000141
Referring to table 1, HARQ processes 1 to 6 are HARQ processes operating on different second communication devices. For example, HARQ processes 1 to 3 are running on the second communication device a, which uses when data is transmitted on HARQ process 1
Figure BDA0001377029460000142
Generating a DMRS; the second communication device A uses when data is transmitted on HARQ process 2
Figure BDA0001377029460000143
Generating a DMRS; the second communication device A uses when data is transmitted on HARQ process 3
Figure BDA0001377029460000144
The DMRS is generated. The HARQ processes 4 to 6 are run on the second communication device B, which uses when data is transmitted on HARQ process 4
Figure BDA0001377029460000145
Generating a DMRS; the second communication device B uses when data is transmitted on HARQ process 5
Figure BDA0001377029460000146
Generating a DMRS; when data is transmitted on HARQ process 6, the second communication device B, uses
Figure BDA0001377029460000147
The DMRS is generated.
Correspondingly, when the first communication device receives data, the first communication device can determine the cyclic shift value of the sequence used by the DMRS according to the DMRS corresponding to the data. Further, the first communication device may determine, from the cyclic shift value, a first parameter used in generating the DMRS
Figure BDA0001377029460000148
The value of (c). According to the first parameter
Figure BDA0001377029460000149
Looking up the above table 1, the second communication device sending the data and the identification of the transmission parameter HARQ process of the data can be determined. For example, a first parameter used by a first communication device in determining to generate a DMRS
Figure BDA00013770294600001410
The first communication device may determine that the data was transmitted by the second communication device B on HARQ process 4.
For example, a first communication device may send a first set of parameters to a second communication device, where the first set of parameters includes a first parameter that the second communication device may adopt when sending data.
Optionally, to reduce the amount of data to be transmitted, an index of the first parameter may be determined for each first parameter. At this time, the first communication device transmits to the second communication device at least one of: the index value indicates information and an index value mapping relationship.
The index value indication information comprises an index value which can be adopted by the second communication equipment when the second communication equipment transmits data; the index value mapping relationship includes a mapping relationship between the index value and the first parameter.
Optionally, each index value, for example, 0, 1, 2, 3, 4, and 5, may be included in the index value indication information. Optionally, to reduce the amount of transmission data, the index value indication information may include: a starting index value and a number of index values. E.g., 0, 6, where 0 and 6 indicate that the index values take on 6 integer values starting from 0. For example, the index value mapping relationship may be as shown in table 2 below.
TABLE 2
Figure BDA00013770294600001411
Illustratively, the identities of HARQ processes in the second communication devices in the first mapping provided in table 1 are different. Optionally, the first communication device may combine the index value mapping relationship and the first mapping relationship, and send the combined index value mapping relationship and the first mapping relationship to the second communication device at the same time. For example, the merged index value mapping and the first mapping may be as shown in table 3 below. For example, the index value mapping relationship may be merged with any other mapping relationship including the first parameter, and other possible first mapping relationships in the following embodiments of the present application may also be merged with the index value mapping relationship, which is not described in detail herein.
TABLE 3
Figure BDA0001377029460000151
Optionally, another possible first mapping relationship is shown in table 4, where the identifiers of the HARQ processes in each second communication device in the first mapping relationship provided in table 4 may be the same, so that it is avoided that the identifiers of the HARQ processes are too long when there are many HARQ processes.
TABLE 4
Figure BDA0001377029460000152
Illustratively, referring to table 4, the identities of HARQ processes on different second communication devices may be the same. For example, the mapping manner between the transmission parameter and the first parameter may also be sequential mapping, such as the mapping relationship between the transmission parameter and the first parameter of the second communication device a in table 4; the mapping may also be in reverse order, such as the mapping relationship between the transmission parameter of the second communication device B and the first parameter in table 4.
Illustratively, referring to table 4, the identities of the HARQ processes running on the second communication device a are 0, 1 and 2, and the HARQ processes running on the second communication device B areThe process identities are likewise 0, 1 and 2. When data is transmitted on HARQ process 0 of the second communication device A, the second communication device A uses
Figure BDA0001377029460000153
Generating a DMRS; the second communication device B uses when data is transmitted on HARQ process 0 of the second communication device B
Figure BDA0001377029460000154
The DMRS is generated. When data is transmitted on HARQ process 1 of the second communication device A, the second communication device A uses
Figure BDA0001377029460000155
Generating a DMRS; the second communication device B uses when data is transmitted on HARQ process 1 of the second communication device B
Figure BDA0001377029460000156
The DMRS is generated. When data is transmitted on HARQ process 2 of the second communication device A, the second communication device A uses
Figure BDA0001377029460000157
The DMRS is generated. The second communication device B uses when data is transmitted on HARQ process 2 of the second communication device B
Figure BDA0001377029460000158
The DMRS is generated.
Correspondingly, when the first communication device receives data, the first communication device can determine the cyclic shift value of the sequence used by the DMRS according to the DMRS corresponding to the data. Further, the first communication device may determine, from the cyclic shift value, a first parameter used in generating the DMRS
Figure BDA0001377029460000159
The value of (c). According to the first parameter
Figure BDA00013770294600001510
Look-up asTable 4 above, the identification of the transmission parameter HARQ process of the data and the identification of the second communication device that transmits the data may be determined. For example, a first parameter used by a first communication device in determining to generate a DMRS
Figure BDA00013770294600001511
The first communication device may determine that the data was transmitted by the second communication device B on HARQ process 0.
Optionally, the mapping manner between the transmission parameter and the first parameter may also be out of order, as shown in table 5.
TABLE 5
Figure BDA00013770294600001512
Further, an embodiment of the present application further provides a method for acquiring a transmission parameter, and a specific implementation manner in which a first communication device sends a first mapping relationship to a second communication device is described in detail in this embodiment.
The first possible transmission mode:
the first communication device broadcasts/multicasts the first mapping relationship.
For example, for the first mapping relationships shown in tables 1, 3, 4, and 5, the first communication device may transmit the preset first mapping relationship in a broadcast/multicast manner, which simplifies the transmission process of the first mapping relationship.
The second possible transmission mode:
the first communication device sends the first mapping relationship to the second communication device using the second communication device specific signaling.
For example, for the first mapping relationships shown in tables 4 and 5, the first communication device may send the preset first mapping relationship by using the specific signaling of the second communication device, so as to avoid other second communication devices from receiving irrelevant information. For example, for the first mapping relationship shown in table 4, when the first communication device sends a message, according to whether the second communication device corresponding to the first parameter is the same, the first mapping relationship in table 4 may be split into multiple sub-mapping relationships, for example, table 4 may be split into the sub-mapping relationship of the second communication device a shown in table 4-1 below, and the sub-mapping relationship of the second communication device B shown in table 4-2 below. Optionally, the first communication device may also directly configure the respective first mapping relationship for each second communication device. The first communication device may send table 4-1 to only the second communication device a according to the identity of the second communication device a, and the first communication device may send table 4-2 to only the second communication device B according to the identity of the second communication device B.
TABLE 4-1
Figure BDA0001377029460000161
TABLE 4-2
Figure BDA0001377029460000162
Optionally, the first mapping relationship shown in table 1 may also be sent using second communication device specific signaling.
Further, on the basis of the embodiment shown in fig. 2, the embodiment of the present application further provides a transmission parameter obtaining method. In this embodiment, the first parameter corresponding to the DMRS is used to indicate the number of times that the second communication device transmits data.
Illustratively, the first parameter corresponding to the DMRS has a corresponding relationship with the number of times the second communication device transmits data, and does not have a mapping relationship with the identifier of the HARQ process used by the second communication device when transmitting data. That is, when the first communication device receives data, the current transmission times of the data can only be determined according to the first parameter corresponding to the DMRS.
Optionally, the first parameter corresponding to the DMRS is used to indicate the number of times the second communication device transmits data, and the method specifically includes: and a second mapping relation is formed between the first parameter corresponding to the DMRS and the transmission times of the data transmitted by the second communication equipment.
Illustratively, when the first mapping relationship is a mapping relationship between the first parameter corresponding to the DMRS and the transmission times of the second communication device to transmit data, the second mapping relationship is the same as the first mapping relationship in the embodiment shown in fig. 3. The first parameter in this embodiment is also the same as the first parameter in the embodiment shown in fig. 3, and details thereof are not repeated herein.
Optionally, the second mapping relationship may be an agreed mapping relationship in a communication standard, or may be preconfigured for the first communication device. Optionally, the first communication device sends the second mapping relationship to the second communication device. For example, the first communication device sends the second mapping relationship to the second communication device before receiving the data, and sends the updated second mapping relationship to the second communication device when the second mapping relationship is updated. Optionally, the mapping manner between the first parameter and the sending times in the second mapping relationship may be sequential mapping, reverse-order mapping, and out-of-order mapping. The second mapping may also be exemplarily broadcast/multicast, and sent using second communication device specific signaling. The second mapping relationship may be as shown in table 6 below.
TABLE 6
Figure BDA0001377029460000171
As shown in Table 6, the first parameter is shown to be
Figure BDA0001377029460000172
The time and mapping mode is a second mapping relation of sequential mapping. Illustratively, the first parameter
Figure BDA0001377029460000173
One for each of the K repeated transmissions of the second communication device. When the second communication equipment carries out the first transmission of data, the second communication equipment uses
Figure BDA0001377029460000174
Generating a DMRS; when the second communication device performs the second transmission of data, the second communication device uses
Figure BDA0001377029460000175
Generating a DMRS; when the second communication device transmits data for the third time, the second communication device uses
Figure BDA0001377029460000176
Generating a DMRS; when the second communication device performs the fourth transmission of data, the second communication device uses
Figure BDA0001377029460000177
Generating a DMRS;
correspondingly, when the first communication device receives data, the first communication device can determine the cyclic shift value of the sequence used by the DMRS according to the DMRS corresponding to the data. Further, the first communication device may determine, from the cyclic shift value, a first parameter used in generating the DMRS
Figure BDA0001377029460000178
The value of (c). According to the first parameter
Figure BDA0001377029460000179
Looking up table 6 above, the second communication device that sent the data and the current number of transmissions of the data can be determined. For example, a first parameter used by a first communication device in determining to generate a DMRS
Figure BDA00013770294600001710
The first communication device may determine that the data is sent by the second communication device and the current transmission time is 4.
Further, an embodiment of the present application further provides a transmission parameter obtaining method, which describes in detail a manner of determining, according to the second mapping relationship, an identifier of an HARQ process used when the second communication device sends data.
In this embodiment, the identifier of the HARQ process and the resource occupied by the second communication device for transmitting data for the first transmission time have a corresponding relationship; and the resource occupied by the second communication equipment for sending the data under the first sending times is related to the current sending times of the data. Correspondingly, fig. 4 is a schematic flow chart of a transmission parameter obtaining method provided in the third embodiment of the present application, and as shown in fig. 4, the transmission parameter obtaining method includes:
s401, the first communication equipment receives data sent by the second communication equipment, and determines a first parameter according to the DMRS corresponding to the data.
S402, the first communication device determines the current sending times of the data according to the first parameter and the second mapping relation.
For example, the first parameter and the determination manner of the current sending times of the data may specifically refer to the description in the foregoing embodiment, which is not repeated herein.
S403, the first communication device determines the resources occupied by the second communication device for sending the data at the first sending times according to the current sending times of the data.
For example, after the first communication device obtains the current transmission frequency of the data according to the DMRS corresponding to the data, since the current transmission frequency of the data is related to the resource occupied by the second communication device for transmitting the data at the first transmission frequency, the resource occupied by the second communication device for transmitting the data at the first transmission frequency may be further determined according to the current transmission frequency.
S404, the first communication device determines the HARQ process identifier according to the resource occupied by the second communication device for sending data in the first sending times.
For example, considering that the first communication device may obtain information of resources occupied when data is transmitted when receiving data, the first communication device may set corresponding information of the resources and the HARQ processes so that the first communication device may determine, according to the resource information, an identifier of the HARQ process used when the second communication device transmits data. For example, the corresponding relationship between the resource occupied by the second communication device for transmitting data at the first transmission times and the identifier of the HARQ process may be configured. Wherein the first sending time is any one of K repeated transmissions.
Optionally, a corresponding relationship between resources occupied by each transmission of the K repeated transmissions of the data in all HARQ processes of the second communication device and the identifier of the HARQ process may also be established. When the first communication device determines the current sending times of the data, the identifier of the HARQ process for sending the data on the second communication device may be determined according to the resource occupied by the data transmission at the current sending times.
It should be noted that the values of the first parameters of different second communication devices may be different, so that the first communication device may determine the first parameter according to the DMRS, and may also determine the second communication device that transmits the data and the corresponding DMRS according to the DMRS.
In this embodiment, the first communication device determines the transmission parameter of the data by generating a second mapping relationship between the first parameter of the DMRS and the transmission frequency of the data, a relationship between the current transmission frequency of the data and the resource occupied by the second communication device for transmitting the data at the first transmission frequency, and a mapping relationship between the resource occupied by the second communication device for transmitting the data at the first transmission frequency and the HARQ process identifier, and then determining the HARQ process identifier of the second communication device for transmitting the data according to the current transmission frequency of the data, thereby reducing the amount of demand for the DMRS.
For example, on the basis of the embodiment shown in fig. 4, an embodiment of the present application further provides a transmission parameter obtaining method, which describes in detail a specific implementation manner of determining, according to the current sending times of the data, a resource occupied by the second communication device for sending the data for the first sending times in the embodiment shown in fig. 4.
In a possible implementation manner, if the current sending times of the data are the same as the first sending times, it is determined that the resource occupied by the second communication device when sending the data at the current sending times is the resource occupied by the second communication device when sending the data at the first sending times.
In another possible implementation manner, if the current sending times of the data are different from the first sending times, the resource occupied by the second communication device for sending the data at the first sending times is related to the resource occupied by the second communication device for sending the data at the current sending times and the sending mode of the data.
Correspondingly, fig. 5 is a schematic flow chart of a transmission parameter obtaining method according to the fourth embodiment of the present application. As shown in fig. 5, the transmission parameter obtaining method provided by the foregoing possible implementation manner includes:
s501, receiving data sent by the second communication device, and determining a first parameter according to the DMRS corresponding to the data.
And S502, determining the current sending times of the data according to the first parameter and the second mapping relation.
S503, determining whether the current sending times of the data are the same as the first sending times; if yes, executing S504; if not, executing S505;
s504, determining that the resources occupied by the second communication equipment when the second communication equipment sends the data under the current sending times are the resources occupied by the second communication equipment when the second communication equipment sends the data under the first sending times; executing S506;
s505, determining the resource occupied by the second communication device for sending the data under the first sending times according to the resource occupied by the second communication device for sending the data under the current sending times and the sending mode of the data; executing S506;
s506, determining the HARQ process identifier according to the resource occupied by the second communication device for sending the data in the first sending times.
For example, S501, S502, and S506 in the embodiment shown in fig. 5 are the same as S401, S402, and S404 in the embodiment shown in fig. 4, and are not described again in this application.
For example, in this embodiment, after acquiring the current number of times of sending the data, the first communication device compares whether the current number of times of sending the data is the same as the first number of times of sending the data.
If the current sending times of the data is the same as the first sending times, the current sending times can be determined to be the first sending times, and the resource occupied by the HARQ process of the second communication device when sending the data under the current sending times is the resource occupied by the HARQ process of the second communication device when sending the data under the first sending times. And then the identifier of the HARQ process can be determined according to the mapping relation between the resource occupied by the second communication equipment for sending the data at the first sending times and the identifier of the HARQ process, and the first communication equipment can distinguish a plurality of data received at the same time according to the sending times of the received data and the HARQ process.
Optionally, in consideration of the high reliability of data transmission, there may be a portion of data that can be successfully transmitted in the first repeat. In this embodiment, the first communication device may set only the first parameter in the first mapping relationship to correspond to the number of transmission times of part of the data one to one, for example, when the number of transmission times of the data is 1, the first parameter corresponds to 0, and when the number of transmission times of the data is 2 to 4, the first parameter corresponds to 2. The second mapping is shown in table 7 below.
TABLE 7
Figure BDA0001377029460000191
Referring to table 7, when the first communication device receives data, the first communication device may determine a cyclic shift value of a sequence used for the DMRS according to the DMRS to which the data corresponds. Further, the first communication device may determine, from the cyclic shift value, a first parameter used in generating the DMRS
Figure BDA0001377029460000192
The value of (c). According to the first parameter
Figure BDA0001377029460000193
Looking up table 7 above, the second communication device that sent the data and the current number of transmissions of the data can be determined. For example, a first parameter used by a first communication device in determining to generate a DMRS
Figure BDA0001377029460000194
The first communication device may determine the second communication device that sent the data and the current number of times the data was sent is 1. When the first sending times is also 1, it is determined that the resource occupied by the data when sent at the current sending times is the resource occupied by the data when sent at the first sending times.
Optionally, the number of sending times with the highest success rate in the K repeated transmissions may also be counted, the number of sending times is used as a first sending number, a specific first parameter is configured for the number of sending times, and a mapping relationship between resources occupied by sending data and the identifier of the HARQ process under the number of sending times is set.
Exemplarily, fig. 6 is a schematic view of a resource occupation situation in a transmission parameter obtaining method according to the fourth embodiment of the present application. A detailed description is given below, with reference to fig. 6, of a specific implementation manner for determining, according to the resource occupied by the second communication device when the second communication device transmits the data for the current transmission time and the transmission mode of the data, the resource occupied by the second communication device for transmitting the data for the first transmission time when the current transmission time of the data is different from the first transmission time.
Referring to fig. 6, exemplarily, the first communication device receives one DATA1, the first communication device determines that the current transmission number of DATA1 is 3 according to the DMRS corresponding to DATA1, and the resource occupied by DATA1 at the third transmission is the first resource block in fig. 6. That is, the first communication device fails to successfully receive the DATA1 sent twice before by the second communication device. At this time, the first communication device determines a transmission mode of the DATA1, such as a frequency hopping mode, and determines the resources occupied by the DATA1 at the first number of transmissions according to the transmission module. For example, when the first number of transmissions is 1 and the transmission mode is a, it may be determined that the number of transmissions is 1, and the resource occupied by the second communication device to transmit DATA1 is the second resource block in fig. 6. The transmission mode a may be non-frequency hopping, and each resource block used when data is repeatedly transmitted is continuous in the time domain. Optionally, when the first number of transmissions is 4, it may also be determined that the number of transmissions is 4 according to the transmission mode of DATA1, and the resource occupied by the second communication device for transmitting DATA1 is the third resource block in fig. 6.
Illustratively, the first communication device receives one DATA2, the first communication device determines that the current transmission number of DATA2 is 3 according to the DMRS corresponding to DATA2, and the resource occupied by DATA2 at the third transmission is the fourth resource block in fig. 6. At this time, the first communication device determines a transmission mode of the DATA2, such as a frequency hopping mode, and determines the resources occupied by the DATA2 at the first number of transmissions according to the transmission module. For example, when the first number of transmissions is 1 and the transmission mode is B, it may be determined that the number of transmissions is 1, and the resource occupied by the second communication device to transmit DATA2 is the fifth resource block in fig. 6. The transmission mode B may illustratively be that each transmission jumps between the first bandwidth part and the fourth bandwidth part when data is repeatedly transmitted, and each resource block that may be used when data is repeatedly transmitted has a preset time interval in the time domain.
Exemplarily, it can be determined that the second communication device sends DATA1 on HARQ process 1 and sends DATA2 on HARQ process 3 according to the mapping relationship between the resource occupied by the second communication device for sending DATA at the first sending time and the identifier of the HARQ process. Referring to fig. 6, fig. 6 also shows that the second communication device transmits data on HARQ process 2 in a transmission mode different from both transmission mode a and transmission mode B.
Another aspect of the embodiments of the present application further provides a data transmission method. Fig. 7 is a flowchart illustrating a data transmission method according to an embodiment of the present application. The execution subject of the method is a second communication device, for example, a terminal device, and the second communication device interacts with the first communication device in the embodiments shown in fig. 2 to fig. 6 by executing the data transmission method provided by this embodiment. The embodiment relates to a method for determining a DMRS corresponding to data to be transmitted by second communication equipment according to a transmission parameter of the data to be transmitted, and sending the data and the corresponding DMRS to first communication equipment at the same time, so that the first communication equipment determines a transmission parameter of the data according to the DMRS, and distinguishes received data according to the transmission parameter. Illustratively, as shown in fig. 7, the data transmission method includes:
s701, determining a DMRS corresponding to data according to transmission parameters of the data to be transmitted;
s702, sending data and the DMRS corresponding to the data to first communication equipment;
wherein the transmission parameter is used for the first communication device to distinguish the received data.
Optionally, the transmission parameters include: at least one of an identifier of an HARQ process used when transmitting data and a current number of times of transmission of data.
Optionally, the transmission parameter is used to indicate a first parameter corresponding to the DMRS, and the first parameter is a parameter used when the DMRS is generated.
Optionally, the transmission parameter is used to indicate a first parameter corresponding to the DMRS, and specifically includes:
the transmission parameter and a first parameter corresponding to the DMRS have a first mapping relation.
Optionally, the current transmission times of the data are used to indicate a first parameter corresponding to the DMRS, where the first parameter is a parameter used when the DMRS is generated.
Optionally, the current number of times of data transmission is used to indicate a first parameter corresponding to the DMRS, and the method specifically includes:
a second mapping relation exists between the current transmission times of the data and the first parameters corresponding to the DMRS;
correspondingly, the step of sending data and the DMRS corresponding to the data to the first communication device by the second communication device includes:
the second communication equipment transmits data and the DMRS corresponding to the data to the first communication equipment on the first resource;
wherein the first resource is related to a resource occupied by transmitting data at the first transmission times; the resource occupied by transmitting data at the first transmission times is related to the identification of the HARQ process.
Optionally, if the current sending times of the data are the same as the first sending times, the first resource is a resource occupied by sending the data at the first sending times.
Optionally, if the current sending times of the data are different from the first sending times; the first resource is related to a resource occupied by sending data for a first sending time, and specifically includes:
the first resource is related to the current sending times of the data, the resource occupied by sending the data under the first sending times and the sending mode of the data.
Optionally, the data transmission method provided in the embodiment of the present application further includes:
the second communication equipment receives at least one of the following sent by the first communication equipment: index value indicating information and a third mapping relation;
the index value indication information comprises an index value which can be adopted when data is transmitted; the third mapping relationship includes a mapping relationship between the index value and the first parameter. The third mapping relationship is an index value mapping relationship.
Optionally, the index value indication information includes: a starting index value and a number of index values.
Optionally, the data transmission method provided in the embodiment of the present application further includes:
receiving a first parameter set sent by a first communication device;
the first parameter set comprises first parameters which can be adopted when uplink data is sent.
Optionally, the data transmission method provided in the embodiment of the present application further includes:
and receiving a first mapping relation sent by the first communication equipment.
Optionally, the data transmission method provided in the embodiment of the present application further includes:
and receiving the second mapping relation sent by the first communication equipment.
Optionally, the first parameter is used to indicate a pseudo-random sequence on which the DMRS is based; or
The first parameter is used to indicate a cyclic shift value of the DMRS.
Optionally, the data transmission method provided in the embodiment of the present application further includes:
receiving a first mapping relation broadcast/multicast by first communication equipment; or
And receiving a first mapping relation sent by the first communication device by using specific signaling.
Optionally, the data transmission method provided in the embodiment of the present application further includes:
receiving a second mapping relation of the broadcast/multicast of the first communication equipment; or
And receiving a second mapping relation sent by the first communication device by using the specific signaling.
In another aspect, an embodiment of the present application further provides a transmission parameter obtaining apparatus, which is used as a first communication device, and is configured to execute the transmission parameter obtaining method on the first communication device side in the foregoing embodiment, and have the same technical features and technical effects.
Fig. 8 is a schematic structural diagram of a transmission parameter obtaining apparatus according to an embodiment of the present application. The transmission parameter acquiring apparatus may be the first communication device in the embodiments shown in fig. 2 to fig. 7, and the transmission parameter acquiring apparatus may be implemented by software, hardware, or a combination of software and hardware. As shown in fig. 8, the transmission parameter acquiring apparatus may include:
a receiving module 11, configured to receive data sent by a second communication device;
a transmission parameter obtaining module 12, configured to determine a transmission parameter of the data according to the demodulation reference signal DMRS corresponding to the data, where the transmission parameter is used to distinguish the data received by the first communication device.
Optionally, the transmission parameters include: at least one of the identifier of the HARQ process used when the second communication device transmits data, and the number of times the second communication device transmits data.
Optionally, the first parameter corresponding to the DMRS is used to indicate a transmission parameter, and the first parameter is a parameter used when the second communication device generates the DMRS.
Optionally, the first parameter corresponding to the DMRS is used to indicate a transmission parameter, and specifically includes:
and a first mapping relation is formed between the first parameter corresponding to the DMRS and the transmission parameter.
Optionally, the first parameter corresponding to the DMRS is used to indicate the number of times the second communication device transmits data, and the first parameter is a parameter used when the second communication device generates the DMRS.
Optionally, the first parameter corresponding to the DMRS is used to indicate the number of times the second communication device transmits data, and the method specifically includes:
a second mapping relation is formed between the first parameter corresponding to the DMRS and the transmission times of the data transmitted by the second communication equipment;
the identifier of the HARQ process and the resource occupied by the second communication equipment for sending the data under the first sending times have a corresponding relation;
the resource occupied by the second communication equipment for sending the data under the first sending times is related to the current sending times of the data;
the first parameter is a parameter adopted when the second communication device generates the DMRS.
Optionally, if the current sending times of the data are the same as the first sending times, the resource occupied by the second communication device when sending the data at the current sending times is the resource occupied by the second communication device when sending the data at the first sending times.
Optionally, if the current sending times of the data are different from the first sending times, the resource occupied by the second communication device for sending the data under the first sending times is related to the current sending times of the data, and specifically includes:
the resource occupied by the second communication device for sending the data at the first sending times is related to the resource occupied by the second communication device for sending the data at the current sending times and the sending mode of the data.
Optionally, as shown in fig. 8, the transmission parameter obtaining apparatus further includes:
a sending module 13, configured to send, to the second communication device, at least one of the following: index value indicating information and a third mapping relation;
the index value indication information comprises an index value which can be adopted by the second communication equipment when the second communication equipment transmits data; the third mapping relationship includes a mapping relationship between the index value and the first parameter.
Optionally, the index value indication information includes: a starting index value and a number of index values.
Optionally, as shown in fig. 8, the transmission parameter obtaining apparatus further includes:
a sending module 13, configured to send the first parameter set to the second communication device;
the first parameter set comprises first parameters which can be adopted by the second communication equipment when the second communication equipment sends data.
Optionally, as shown in fig. 8, the transmission parameter obtaining apparatus further includes:
a sending module 13, configured to send the first mapping relationship to the second communication device.
Optionally, as shown in fig. 8, the transmission parameter obtaining apparatus further includes:
a sending module 13, configured to send the second mapping relationship to the second communication device.
Optionally, the first parameter is used to indicate a pseudo-random sequence on which the DMRS is based; or
The first parameter is used to indicate a cyclic shift value of the DMRS.
Optionally, the sending module 13 is specifically configured to broadcast/multicast the first mapping relationship; or sending the first mapping relation to the second communication device by using the specific signaling of the second communication device.
Optionally, the sending module 13 is specifically configured to broadcast/multicast the second mapping relationship; or sending the second mapping relationship to the second communication device using second communication device specific signaling.
Fig. 9 is a schematic structural diagram of a data transmission device according to an embodiment of the present application. The data transmission device may be the second communication device in the embodiments shown in fig. 2 to 8, and the data transmission device may be implemented by software, hardware, or a combination of software and hardware. As shown in fig. 9, the data transmission apparatus may include:
the DMRS determining module 21 is configured to determine, according to a transmission parameter of data to be transmitted, a DMRS corresponding to the data;
a sending module 22, configured to send data and a DMRS corresponding to the data to a first communication device; wherein the transmission parameter is used for the first communication device to distinguish the received data.
Optionally, the transmission parameters include: at least one of an identifier of an HARQ process used when transmitting data and a current number of times of transmission of data.
Optionally, the transmission parameter is used to indicate a first parameter corresponding to the DMRS, and the first parameter is a parameter used when the DMRS is generated.
Optionally, the transmission parameter is used to indicate a first parameter corresponding to the DMRS, and specifically includes:
the transmission parameter and a first parameter corresponding to the DMRS have a first mapping relation.
Optionally, the current transmission times of the data are used to indicate a first parameter corresponding to the DMRS, where the first parameter is a parameter used when the DMRS is generated.
Optionally, the current number of times of data transmission is used to indicate a first parameter corresponding to the DMRS, and the method specifically includes:
a second mapping relation exists between the current transmission times of the data and the first parameters corresponding to the DMRS;
the method for transmitting data and the DMRS corresponding to the data to the first communication device includes:
transmitting data and a DMRS corresponding to the data to a first communication device on a first resource;
wherein the first resource is related to a resource occupied by transmitting data at the first transmission times; the resource occupied by transmitting data at the first transmission times is related to the identification of the HARQ process.
Optionally, if the current sending times of the data are the same as the first sending times, the first resource is a resource occupied by sending the data at the first sending times.
Optionally, if the current sending times of the data are different from the first sending times; the first resource is related to a resource occupied by sending data for a first sending time, and specifically includes:
the first resource is related to the current sending times of the data, the resource occupied by sending the data under the first sending times and the sending mode of the data.
Optionally, as shown in fig. 9, the data transmission apparatus further includes:
a receiving module 23, configured to receive at least one of the following sent by the first communication device: index value indicating information and a third mapping relation;
the index value indication information comprises an index value which can be adopted when data is transmitted; the third mapping relationship includes a mapping relationship between the index value and the first parameter.
Optionally, the index value indication information includes: a starting index value and a number of index values.
Optionally, as shown in fig. 9, the data transmission apparatus further includes:
a receiving module 23, configured to receive a first parameter set sent by a first communication device;
the first parameter set comprises first parameters which can be adopted when uplink data is sent.
Optionally, as shown in fig. 9, the data transmission apparatus further includes:
the receiving module 23 is configured to receive the first mapping relationship sent by the first communication device.
Optionally, as shown in fig. 9, the data transmission apparatus further includes:
the receiving module 23 is configured to receive the second mapping relationship sent by the first communication device.
Optionally, the first parameter is used to indicate a pseudo-random sequence on which the DMRS is based; or
The first parameter is used to indicate a cyclic shift value of the DMRS.
Optionally, as shown in fig. 9, the data transmission apparatus further includes:
a receiving module 23, configured to receive a first mapping relationship of broadcast/multicast of a first communication device; or
And receiving a first mapping relation sent by the first communication device by using specific signaling.
Optionally, as shown in fig. 9, the data transmission apparatus further includes:
a receiving module 23, configured to receive a second mapping relationship of broadcast/multicast of the first communication device; or
And receiving a second mapping relation sent by the first communication device by using the specific signaling.
In another aspect of the embodiments of the present application, a communication device is further provided, which is configured to execute the method for acquiring a transmission resource on a first communication device side in the foregoing embodiments, and has the same technical features and technical effects.
Fig. 10 is a schematic structural diagram of a communication device according to an embodiment of the present application. The communication device may include a memory 31, a processor 32, at least one communication bus 33, a transmitter 34, and a receiver 35. The communication bus 33 is used to realize communication connection between the elements. The memory 31 may comprise a high-speed RAM memory, and may also include a non-volatile storage NVM, such as at least one disk memory, in which various programs may be stored in the memory 31 for performing various processing functions and implementing the method steps of the present embodiment. In this embodiment, the transmitter 34 may be a radio frequency processing module or a baseband processing module in the base station, and the receiver 35 may be a radio frequency processing module or a baseband processing module in the base station. The transmitter 34 and the receiver 35 may be separately provided or may be integrated together to form a transceiver, and both the transmitter 34 and the receiver 35 may be coupled to the processor 32. The communication bus 33 may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The communication bus 33 may be divided into an address bus, a data bus, a control bus, and the like. For ease of illustration, only one thick line is shown in FIG. 10, but this is not intended to represent only one bus or type of bus. Fig. 10 shows a simplified schematic diagram of a possible design structure of the communication device involved in the above-described embodiment. It will be appreciated that fig. 10 only shows a simplified design of the network device. In practical applications, the communication device may comprise any number of transmitters, receivers, processors, memories, etc., and all communication devices that may implement the present application are within the scope of the present application.
Specifically, in this embodiment, the receiver 35 is configured to receive data sent by the second communication device;
and the processor 32 is configured to determine a transmission parameter of the data according to the demodulation reference signal DMRS corresponding to the data, where the transmission parameter is used to distinguish the data received by the first communication device.
Optionally, the transmission parameters include: at least one of the identifier of the HARQ process used when the second communication device transmits data, and the number of times the second communication device transmits data.
Optionally, the first parameter corresponding to the DMRS is used to indicate a transmission parameter, and the first parameter is a parameter used when the second communication device generates the DMRS.
Optionally, the first parameter corresponding to the DMRS is used to indicate a transmission parameter, and specifically includes:
and a first mapping relation is formed between the first parameter corresponding to the DMRS and the transmission parameter.
Optionally, the first parameter corresponding to the DMRS is used to indicate the number of times the second communication device transmits data, and the first parameter is a parameter used when the second communication device generates the DMRS.
Optionally, the first parameter corresponding to the DMRS is used to indicate the number of times the second communication device transmits data, and the method specifically includes:
a second mapping relation is formed between the first parameter corresponding to the DMRS and the transmission times of the data transmitted by the second communication equipment;
the identifier of the HARQ process and the resource occupied by the second communication equipment for sending the data under the first sending times have a corresponding relation;
the resource occupied by the second communication equipment for sending the data under the first sending times is related to the current sending times of the data;
the first parameter is a parameter adopted when the second communication device generates the DMRS.
Optionally, if the current sending times of the data are the same as the first sending times, the resource occupied by the second communication device when sending the data at the current sending times is the resource occupied by the second communication device when sending the data at the first sending times.
Optionally, if the current sending times of the data are different from the first sending times, the resource occupied by the second communication device for sending the data under the first sending times is related to the current sending times of the data, and specifically includes:
the resource occupied by the second communication device for sending the data at the first sending times is related to the resource occupied by the second communication device for sending the data at the current sending times and the sending mode of the data.
Optionally, the communication device further includes:
a transmitter 34 for transmitting to the second communication device at least one of: index value indicating information and a third mapping relation;
the index value indication information comprises an index value which can be adopted by the second communication equipment when the second communication equipment transmits data; the third mapping relationship includes a mapping relationship between the index value and the first parameter.
Optionally, the index value indication information includes: a starting index value and a number of index values.
Optionally, the communication device further includes:
a transmitter 34 for transmitting a first set of parameters to a second communication device;
the first parameter set comprises first parameters which can be adopted by the second communication equipment when the second communication equipment sends data.
Optionally, the communication device further includes:
a transmitter 34, configured to transmit the first mapping relationship to the second communication device.
Optionally, the communication device further includes:
a transmitter 34, configured to transmit the second mapping relationship to the second communication device.
Optionally, the first parameter is used to indicate a pseudo-random sequence on which the DMRS is based; or
The first parameter is used to indicate a cyclic shift value of the DMRS.
Optionally, the sender 34 is specifically configured to broadcast/multicast the first mapping relationship; or sending the first mapping relation to the second communication device by using the specific signaling of the second communication device.
Optionally, the sender 34 is specifically configured to broadcast/multicast the second mapping relationship; or sending the second mapping relationship to the second communication device using second communication device specific signaling.
In another aspect of the embodiments of the present application, a communication device is further provided, which is configured to execute the data transmission method on the device side of the second communication device in the foregoing embodiments, and has the same technical features and technical effects. The structure of the communication device in this embodiment can be referred to the structure of the communication device shown in fig. 10 described above.
Specifically, in this embodiment, the processor 32 is configured to determine, according to a transmission parameter of data to be transmitted, a DMRS corresponding to the data;
a transmitter 34 for transmitting data and a DMRS corresponding to the data to a first communication device; wherein the transmission parameter is used for the first communication device to distinguish the received data.
Optionally, the transmission parameters include: at least one of an identifier of an HARQ process used when transmitting data and a current number of times of transmission of data.
Optionally, the transmission parameter is used to indicate a first parameter corresponding to the DMRS, and the first parameter is a parameter used when the DMRS is generated.
Optionally, the transmission parameter is used to indicate a first parameter corresponding to the DMRS, and specifically includes:
the transmission parameter and a first parameter corresponding to the DMRS have a first mapping relation.
Optionally, the current transmission times of the data are used to indicate a first parameter corresponding to the DMRS, where the first parameter is a parameter used when the DMRS is generated.
Optionally, the current number of times of data transmission is used to indicate a first parameter corresponding to the DMRS, and the method specifically includes:
a second mapping relation exists between the current transmission times of the data and the first parameters corresponding to the DMRS;
the method for transmitting data and the DMRS corresponding to the data to the first communication device includes:
transmitting data and a DMRS corresponding to the data to a first communication device on a first resource;
wherein the first resource is related to a resource occupied by transmitting data at the first transmission times; the resource occupied by transmitting data at the first transmission times is related to the identification of the HARQ process.
Optionally, if the current sending times of the data are the same as the first sending times, the first resource is a resource occupied by sending the data at the first sending times.
Optionally, if the current sending times of the data are different from the first sending times; the first resource is related to a resource occupied by sending data for a first sending time, and specifically includes:
the first resource is related to the current sending times of the data, the resource occupied by sending the data under the first sending times and the sending mode of the data.
Optionally, the communication device further includes:
a receiver 35 for receiving at least one of the following sent by the first communication device: index value indicating information and a third mapping relation;
the index value indication information comprises an index value which can be adopted when data is transmitted; the third mapping relationship includes a mapping relationship between the index value and the first parameter.
Optionally, the index value indication information includes: a starting index value and a number of index values.
Optionally, the communication device further includes:
a receiver 35 for receiving a first set of parameters transmitted by a first communication device;
the first parameter set comprises first parameters which can be adopted when uplink data is sent.
Optionally, the communication device further includes:
the receiver 35 is configured to receive the first mapping relationship sent by the first communication device.
Optionally, the communication device further includes:
and the receiver 35 is configured to receive the second mapping relationship sent by the first communication device.
Optionally, the first parameter is used to indicate a pseudo-random sequence on which the DMRS is based; or
The first parameter is used to indicate a cyclic shift value of the DMRS.
Optionally, the communication device further includes:
a receiver 35, configured to receive a first mapping relationship broadcast/multicast by a first communication device; or
And receiving a first mapping relation sent by the first communication device by using specific signaling.
Optionally, the communication device further includes:
a receiver 35, configured to receive the second mapping relationship of broadcast/multicast of the first communication device; or
And receiving a second mapping relation sent by the first communication device by using the specific signaling.
In another aspect, an embodiment of the present application further provides a data transmission system, including the first communication device and the second communication device in any of the above embodiments.
A further aspect of the embodiments of the present application further provides a computer storage medium for storing computer software instructions for the first communication device, which includes a program for executing the method of the first communication device side in any one of the embodiments. Embodiments of the present application further provide a computer program product, which includes instructions that, when the computer program is executed by a computer, cause the computer to perform the functions performed by the first communication device.
Embodiments of the present application further provide a chip system, where the chip system includes a processor, configured to support a first communication device to implement the functions referred to in any of the foregoing embodiments, for example, to generate or process data and/or information referred to in the foregoing methods. In one possible design, the system-on-chip further includes a memory for storing necessary program instructions and data for the first communication device. The chip system may be constituted by a chip, or may include a chip and other discrete devices.
In another aspect, the present invention further provides a computer storage medium for storing computer software instructions for the second communication device, which includes a program for executing the method of the second communication device side in any one of the above embodiments. Embodiments of the present application also provide a computer program product comprising instructions that, when executed by a computer, cause the computer to perform functions performed by a second communication device.
Embodiments of the present application further provide a chip system, where the chip system includes a processor, configured to support a second communication device to implement the functions involved in any of the foregoing embodiments, for example, to generate or process data and/or information involved in the foregoing methods. In one possible design, the system-on-chip further includes a memory for storing program instructions and data necessary for the second communication device. The chip system may be constituted by a chip, or may include a chip and other discrete devices.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
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 terms "first," "second," "third," "fourth," and the like in the description and in the claims of the present application and in the above-described drawings (if any) are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
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 functions, if implemented in the form of software functional units 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 or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including 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: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims (33)

1. A method for acquiring transmission parameters, the method comprising:
the method comprises the steps that a first communication device receives data sent by a second communication device;
the method comprises the steps that a first communication device determines transmission parameters of data according to a demodulation reference signal (DMRS) corresponding to the data, wherein the transmission parameters are used for distinguishing the data received by the first communication device;
the transmission parameters include: at least one of an identifier of a hybrid automatic repeat request (HARQ) process adopted when the second communication device sends the data, and the number of times the second communication device sends the data.
2. The method of claim 1, wherein a first parameter corresponding to the DMRS is used to indicate the transmission parameter, and wherein the first parameter is a parameter used by the second communications device to generate the DMRS.
3. The method according to claim 2, wherein the first parameter corresponding to the DMRS is used to indicate the transmission parameter, and specifically comprises:
and a first mapping relation is formed between the first parameter corresponding to the DMRS and the transmission parameter.
4. The method of claim 1, wherein a first parameter corresponding to the DMRS is used for indicating a transmission number of times the second communication device transmits the data, and wherein the first parameter is a parameter used by the second communication device to generate the DMRS.
5. The method according to claim 4, wherein the first parameter corresponding to the DMRS is used to indicate a transmission number of times that the second communication device transmits the data, and specifically includes:
a second mapping relation exists between the first parameter corresponding to the DMRS and the transmission times of the second communication equipment for transmitting the data;
the identifier of the HARQ process and the resource occupied by the second communication equipment for sending data under the first sending times have a corresponding relation;
and the resource occupied by the second communication equipment for sending the data under the first sending times is related to the current sending times of the data.
6. The method according to claim 5, wherein if the current sending times of the data is the same as the first sending times, the resources occupied by the second communication device when sending the data under the current sending times are the resources occupied by the second communication device when sending the data under the first sending times.
7. The method according to claim 5, wherein if the current number of times of sending the data is different from the first number of times of sending, the resource occupied by the second communication device for sending the data at the first number of times of sending is related to the current number of times of sending the data, and specifically includes:
and the resource occupied by the second communication equipment for sending the data under the first sending times is related to the resource occupied by the second communication equipment for sending the data under the current sending times and the sending mode of the data.
8. The method according to any one of claims 2 to 7, wherein before the first communication device receives the data sent by the second communication device, the method further comprises:
the first communication device sending to the second communication device at least one of: index value indicating information and a third mapping relation;
wherein the index value indication information comprises an index value employable by the second communication device in transmitting the data; the third mapping relationship comprises a mapping relationship between the index value and the first parameter.
9. The method of claim 8, wherein the index value indication information comprises: a starting index value and a number of index values.
10. The method according to any one of claims 2 to 7, wherein before the first communication device receives the data sent by the second communication device, the method further comprises:
the first communication device sending a first set of parameters to the second communication device;
wherein the first parameter set comprises a first parameter that the second communication device can adopt when transmitting data.
11. The method of claim 3, wherein before the first communication device receives the data sent by the second communication device, the method further comprises:
and the first communication equipment sends the first mapping relation to the second communication equipment.
12. The method of claim 5, wherein before the first communication device receives the data sent by the second communication device, the method further comprises:
and the first communication equipment sends the second mapping relation to the second communication equipment.
13. The method according to any of claims 2-7, 9, 11, 12, wherein the first parameter is used to indicate a pseudo-random sequence on which the DMRS is based; or
The first parameter is used to indicate a cyclic shift value of the DMRS.
14. The method according to claim 11, wherein the sending, by the first communication device, the first mapping relationship to the second communication device specifically includes:
the first communication device broadcasts/multicasts the first mapping relation; or
The first communication device sends the first mapping relation to the second communication device by using second communication device specific signaling.
15. The method according to claim 12, wherein the sending, by the first communication device, the second mapping relationship to the second communication device specifically includes:
the first communication device broadcasts/multicasts the second mapping relation; or
The first communication device sends the second mapping relation to the second communication device by using a second communication device specific signaling.
16. A method of data transmission, the method comprising:
determining a DMRS corresponding to data to be transmitted according to transmission parameters of the data to be transmitted;
transmitting the data and the DMRS corresponding to the data to a first communication device; wherein the transmission parameter is used for the first communication device to distinguish the received data;
the transmission parameters include: at least one of an identifier of an HARQ process used when the data is transmitted and a current number of times of transmission of the data.
17. The method of claim 16, wherein the transmission parameter is used to indicate a first parameter corresponding to the DMRS, and wherein the first parameter is a parameter used in generating the DMRS.
18. The method according to claim 17, wherein the transmission parameter is used to indicate a first parameter corresponding to the DMRS, and specifically comprises:
and a first mapping relation is formed between the transmission parameters and first parameters corresponding to the DMRS.
19. The method of claim 16, wherein the current number of transmissions of the data is used to indicate a first parameter corresponding to the DMRS, and wherein the first parameter is a parameter used in generating the DMRS.
20. The method according to claim 19, wherein the current number of times of transmission of the data is used to indicate the first parameter corresponding to the DMRS, and specifically comprises:
a second mapping relation exists between the current transmission times of the data and the first parameter corresponding to the DMRS;
the sending the data and the DMRS corresponding to the data to the first communication device includes:
transmitting the data and the DMRS corresponding to the data to a first communication device on a first resource;
the first resource is related to the resource occupied by sending data under the first sending times; and the resource occupied by sending data under the first sending times is related to the identifier of the HARQ process.
21. The method of claim 20, wherein if the current number of times of sending the data is the same as the first number of times of sending, the first resource is a resource occupied by sending the data for the first number of times of sending.
22. The method of claim 20, wherein if the current number of transmissions of the data is different from the first number of transmissions; the first resource is related to a resource occupied by sending data for a first sending time, and specifically includes:
the first resource is related to the current sending times of the data, the resource occupied by sending the data under the first sending times and the sending mode of the data.
23. The method according to any one of claims 17 to 22, wherein before determining the DMRS corresponding to the data according to the transmission parameter of the data to be transmitted, the method further comprises:
receiving at least one of the following sent by the first communication device: index value indicating information and a third mapping relation;
wherein the index value indication information comprises an index value that can be adopted when the data is transmitted; the third mapping relationship comprises a mapping relationship between the index value and the first parameter.
24. The method of claim 23, wherein the index value indication information comprises: a starting index value and a number of index values.
25. The method according to any one of claims 17 to 22, wherein before determining the DMRS corresponding to the data according to the transmission parameter of the data to be transmitted, the method further comprises:
receiving a first parameter set sent by the first communication equipment;
the first parameter set comprises a first parameter which can be adopted when uplink data is sent.
26. The method of claim 18, wherein before determining the DMRS corresponding to the data according to the transmission parameter of the data to be transmitted, the method further comprises:
and receiving the first mapping relation sent by the first communication equipment.
27. The method of claim 20, wherein before determining the DMRS corresponding to the data according to the transmission parameter of the data to be transmitted, the method further comprises:
and receiving the second mapping relation sent by the first communication equipment.
28. The method of any of claims 17-22, 24, 26, 27, wherein the first parameter is indicative of a pseudo-random sequence on which the DMRS is based; or
The first parameter is used to indicate a cyclic shift value of the DMRS.
29. The method of claim 26, wherein before determining the DMRS corresponding to the data according to the transmission parameter of the data to be transmitted, the method further comprises:
receiving the first mapping relation broadcast/multicast by the first communication device; or
Receiving the first mapping relation sent by the first communication device by using specific signaling.
30. The method of claim 27, wherein before the first communication device receives the data sent by the second communication device, the method further comprises:
receiving the second mapping relation broadcast/multicast by the first communication device; or
Receiving the second mapping relation sent by the first communication device by using specific signaling.
31. A transmission parameter acquisition apparatus as a first communication device, the apparatus comprising: a memory, a processor, a transceiver and a bus system;
the memory, processor and transceiver are coupled by the bus system;
the memory is configured to store instructions, and the processor is configured to execute the instructions;
wherein the processor, when executing the instructions, performs the steps in the method of any one of claims 1 to 15.
32. A data transmission apparatus as a second communication device, characterized by comprising: a memory, a processor, a transceiver and a bus system;
the memory, processor and transceiver are coupled by the bus system;
the memory is configured to store instructions, and the processor is configured to execute the instructions;
wherein the processor when executing the instructions performs the steps in the method of any one of claims 16 to 30.
33. A chip system, comprising a processor configured to perform the method of any one of claims 1 to 30.
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