CN110831239A - Data transmission method, data transmission device and communication equipment - Google Patents
Data transmission method, data transmission device and communication equipment Download PDFInfo
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- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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- H04W74/002—Transmission of channel access control information
- H04W74/004—Transmission of channel access control information in the uplink, i.e. towards network
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Abstract
The invention provides a data transmission method, a data transmission device and communication equipment. The data transmission method applied to the terminal comprises the following steps: generating a channel access request signaling, wherein the channel access request signaling comprises an identification bit of a transmission mode selected according to the number of a plurality of data frames when the plurality of data frames need to be sent in one transmission opportunity, the identification bit identifies the transmission mode of firstly sending all data in sequence and then receiving all confirmation messages in sequence when the identification bit is a first value, the identification bit identifies the transmission mode of sending any data and sending the next data after receiving the confirmation message corresponding to any data when the identification bit is a second value, and the transmission opportunity comprises an uplink resource transmission opportunity and a downlink resource transmission opportunity; and sending a channel access request signaling to the base station. The terminal can select a proper data transmission mode under the unlicensed spectrum, so that the utilization efficiency of the spectrum is improved.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a data transmission method, a data transmission apparatus, and a communication device.
Background
Currently, development work of a 5 th generation mobile communication system (5G) is actively underway. According to the future application requirements, the 5G system needs to support a variety of service scenarios, including eMBB (Enhanced Mobile Broadband), URLLC (Ultra-reliable and Low Latency Communications), and MMTC (Massive Machine Type of Communication). Since the resources of the licensed spectrum are very limited, the 5G standard also utilizes the unlicensed spectrum for data transmission, which can provide a larger transmission bandwidth than the licensed spectrum, especially for application scenarios of large data volume such as the eMBB. However, the disadvantage of the unlicensed spectrum is also obvious, and since it should follow an LBT (Listen Before talk) mechanism, where the LBT mechanism is a channel access mechanism, because the availability of a channel on the unlicensed spectrum cannot be guaranteed at any moment, LBT requires that a channel is monitored Before data transmission, idle channel evaluation is performed, and data transmission is performed under the condition that the channel is guaranteed to be idle, so that the effect of guaranteeing the delay is not ideal.
In the standard setting process, there is a technical discussion that if there is data to be transmitted in the unlicensed band, LBT mechanism is followed, and in order to avoid unnecessary interference and waste of spectrum, a handshake protocol is used before data transmission. As shown in fig. 1, in an LBT mechanism, a UE (User Equipment) sends a CARQ (Channel Access Request) signaling to a gNB (base station), and the gNB feeds back a card (Channel Access Response) signaling, where G denotes an uplink and downlink switching point in the LBT mechanism, and mcot (maximum Channel occupancy time) is a maximum Channel occupancy time, and the establishment of a handshake mechanism is also for the purpose that subsequent data transmission is not interfered.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art or the related art.
To this end, an aspect of the present invention is to propose a data transmission method.
Another aspect of the present invention is to provide a data transmission apparatus.
Yet another aspect of the present invention is to provide a communication device.
In view of this, according to an aspect of the present invention, a data transmission method is provided, which is applied to a terminal, and the method includes: generating a channel access request signaling, wherein the channel access request signaling comprises an identification bit of a transmission mode selected according to the number of a plurality of data frames when the plurality of data frames need to be sent in one transmission opportunity, the identification bit identifies the transmission mode of firstly sending all data in sequence and then receiving all confirmation messages in sequence when the identification bit is a first value, the identification bit identifies the transmission mode of sending any data and sending the next data after receiving the confirmation message corresponding to any data when the identification bit is a second value, and the transmission opportunity comprises an uplink resource transmission opportunity and a downlink resource transmission opportunity; and sending a channel access request signaling to the base station.
In the data transmission method provided by the invention, a terminal generates a channel access request signaling, wherein the channel access request signaling comprises an identification bit, and the identification bit is used for identifying a transmission mode selected according to the number of a plurality of data frames when the plurality of data frames need to be sent in one transmission opportunity. When the identification bit is a first value, the terminal adopts a transmission mode of sequentially sending all data and then sequentially receiving all confirmation messages, and when the identification bit is a second value, the terminal adopts a transmission mode of sending any data and sending the next data after receiving the confirmation message corresponding to any data. Further, the channel access request signaling is sent to the base station, so that the terminal and the base station establish a handshake protocol, and the base station specifies the transmission mode of the terminal according to the identification bit. It should be noted that the transmission mode is determined according to the number of data frames that the terminal needs to send, and the transmission opportunity includes an uplink resource transmission opportunity and a downlink resource transmission opportunity, so that the terminal can select a suitable data transmission mode in the unlicensed spectrum, thereby improving the utilization efficiency of the spectrum.
Further, the transmission opportunity refers to including the allocated radio resource in frequency and the allocated time interval in time domain.
The data transmission method according to the present invention may further have the following technical features:
in the above technical solution, preferably, the method further includes: when the number of the plurality of data frames is larger than the maximum number value of one-time transmission specified by a Media Access Control (MAC) layer, setting the identification bit as a first value; and when the number of the plurality of data frames is less than or equal to the maximum number value of one-time transmission specified by the MAC layer, setting the identification bit to be a second value.
In the technical scheme, when the number of a plurality of data frames is greater than the maximum number value of one-time transmission specified by the MAC layer, the identification bit is set to be a first value. When the number of the plurality of data frames is less than or equal to the maximum number value of one-time transmission specified by the MAC layer, the identification bit is set to be a second value, for example, the maximum number value of one-time transmission specified by the MAC layer is 10M. The terminal can select a data transmission mode according to the number of data frames required to be sent, select a transmission mode of sequentially sending all data and then sequentially receiving all confirmation messages under the condition that the data frame data is large, select a transmission mode of sending any data and sending the next data after receiving the confirmation message corresponding to any data under the condition that the data frame data is small, and ensure accurate sending of the data and effective utilization of frequency spectrum.
In any of the above technical solutions, preferably, the channel access request signaling includes time-frequency resources that need to be occupied by multiple data frames, an MCS (Modulation and Coding Scheme) mode for transmitting the multiple data frames, and transmission power.
In the technical scheme, the channel access request signaling includes, but is not limited to, time-frequency resources that a plurality of data frames need to occupy, MCS modes and transmission powers for transmitting the plurality of data frames, and other information, so that the terminal and the base station successfully establish a handshake protocol, and the base station knows the sending information (resources occupied, MCS modes and transmission powers) of the data frames sent by the terminal, and the base station is ensured to correctly receive the data.
In any of the above technical solutions, preferably, the method further includes: and setting the interval time between the data sending and the confirmation message receiving, wherein the interval time is the reaction time length of other terminals when the sensing channel is busy, and the reaction time lengths are defined consistently.
In the technical scheme, the interval time between the sending of data and the receiving of the confirmation message, namely the uplink and downlink switching point is set, wherein the interval time is the reaction time of other terminals when sensing that the channel is busy, so that other terminals cannot occupy the channel, and the reaction time of each terminal is defined consistently.
In any of the above technical solutions, preferably, after sending the channel access request signaling to the base station, the method further includes: and receiving a channel access response signaling sent by the base station, sending a plurality of data frames to the base station according to the selected transmission mode, and receiving an acknowledgement message of each data frame by the base station, wherein the MCS mode of the plurality of data frames is the same as the MCS mode of the acknowledgement message frame.
In the technical scheme, a channel access response signaling fed back by a base station to a channel access request signaling is received, a data frame and an acknowledgement message of the received data frame are sent according to a selected transmission mode, and the MCS mode of sending a plurality of data frames is the same as the MCS mode of receiving the acknowledgement message frame, so that the operation processes of coding modulation and decoding modulation are simplified.
In any of the above technical solutions, preferably, the acknowledgment message includes a data identifier, and the data identifier indicates a data transmission manner of the base station.
In the technical scheme, the acknowledgement message sent by the base station to the terminal has a data identifier, and the data identifier is used for identifying a data sending mode of the base station, such as an MCS mode and transmission power of the data sent by the base station, so that the terminal can correctly receive the data sent by the base station.
According to another aspect of the present invention, a data transmission apparatus is provided, which is applied to a terminal, and includes: the processing module is used for generating a channel access request signaling, wherein the channel access request signaling comprises an identification bit of a transmission mode selected according to the number of a plurality of data frames when the plurality of data frames need to be sent in one transmission opportunity, the identification bit identifies the transmission modes of firstly sending all data in sequence and then receiving all confirmation messages in sequence when the identification bit is a first value, the identification bit identifies the transmission mode of sending any data and then sending the next data after receiving the confirmation message corresponding to any data when the identification bit is a second value, and the transmission opportunity comprises an uplink resource transmission opportunity and a downlink resource transmission opportunity; and the sending module is used for sending the channel access request signaling to the base station.
In the data transmission device provided by the invention, the terminal generates the channel access request signaling, the channel access request signaling comprises the identification bit, and the identification bit is used for identifying the transmission mode selected according to the number of a plurality of data frames when the plurality of data frames need to be sent in one transmission opportunity. When the identification bit is a first value, the terminal adopts a transmission mode of sequentially sending all data and then sequentially receiving all confirmation messages, and when the identification bit is a second value, the terminal adopts a transmission mode of sending any data and sending the next data after receiving the confirmation message corresponding to any data. Further, the channel access request signaling is sent to the base station, so that the terminal and the base station establish a handshake protocol, and the base station specifies the transmission mode of the terminal according to the identification bit. It should be noted that the transmission mode is determined according to the number of data frames that the terminal needs to send, and the transmission opportunity includes an uplink resource transmission opportunity and a downlink resource transmission opportunity, so that the terminal can select a suitable data transmission mode in the unlicensed spectrum, thereby improving the utilization efficiency of the spectrum.
Further, the transmission opportunity refers to including the allocated radio resource in frequency and the allocated time interval in time domain.
The data transmission device according to the present invention may further include the following technical features:
in the foregoing technical solution, preferably, the processing module is further configured to set the identification bit to be a first value when the number of the plurality of data frames is greater than a maximum number value of one-time transmission specified by the MAC layer; and when the number of the plurality of data frames is less than or equal to the maximum number value of one-time transmission specified by the MAC layer, setting the identification bit to be a second value.
In the technical scheme, when the number of a plurality of data frames is greater than the maximum number value of one-time transmission specified by the MAC layer, the identification bit is set to be a first value. When the number of the plurality of data frames is less than or equal to the maximum number value of one-time transmission specified by the MAC layer, the identification bit is set to be a second value, for example, the maximum number value of one-time transmission specified by the MAC layer is 10M. The terminal can select a data transmission mode according to the number of data frames required to be sent, select a transmission mode of sequentially sending all data and then sequentially receiving all confirmation messages under the condition that the data frame data is large, select a transmission mode of sending any data and sending the next data after receiving the confirmation message corresponding to any data under the condition that the data frame data is small, and ensure accurate sending of the data and effective utilization of frequency spectrum.
In any of the above technical solutions, preferably, the channel access request signaling includes time-frequency resources that need to be occupied by multiple data frames, MCS modes for transmitting the multiple data frames, and transmission power.
In the technical scheme, the channel access request signaling includes, but is not limited to, time-frequency resources that a plurality of data frames need to occupy, MCS modes and transmission powers for transmitting the plurality of data frames, and other information, so that the terminal and the base station successfully establish a handshake protocol, and the base station knows the sending information (resources occupied, MCS modes and transmission powers) of the data frames sent by the terminal, and the base station is ensured to correctly receive the data.
In any of the above technical solutions, preferably, the processing module is further configured to set an interval time between sending the data and receiving the acknowledgement message, where the interval time is a reaction time length when the sensing channel of the other terminal is busy, and the reaction time lengths are defined consistently.
In the technical scheme, the interval time between the sending of data and the receiving of the confirmation message, namely the uplink and downlink switching point is set, wherein the interval time is the reaction time of other terminals when sensing that the channel is busy, so that other terminals cannot occupy the channel, and the reaction time of each terminal is defined consistently.
In any of the above technical solutions, preferably, the method further includes: and the receiving module is used for receiving the channel access response signaling sent by the base station, sending a plurality of data frames to the base station according to the selected transmission mode and receiving the confirmation message of each data frame by the base station, wherein the MCS mode of the plurality of data frames is the same as the MCS mode of the confirmation message frame.
In the technical scheme, a channel access response signaling fed back by a base station to a channel access request signaling is received, a data frame and an acknowledgement message of the received data frame are sent according to a selected transmission mode, and the MCS mode of sending a plurality of data frames is the same as the MCS mode of receiving the acknowledgement message frame, so that the operation processes of coding modulation and decoding modulation are simplified.
In any of the above technical solutions, preferably, the acknowledgment message includes a data identifier, and the data identifier indicates a data transmission manner of the base station.
In the technical scheme, the acknowledgement message sent by the base station to the terminal has a data identifier, and the data identifier is used for identifying a data sending mode of the base station, such as an MCS mode and transmission power of the data sent by the base station, so that the terminal can correctly receive the data sent by the base station.
According to a further aspect of the present invention, a communication device is provided, which includes the data transmission apparatus according to any of the above technical solutions.
The communication device provided by the invention comprises the data transmission device of any technical scheme, and can realize all the beneficial effects of the data transmission device of any technical scheme.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a diagram showing a handshake mechanism in the related art;
FIG. 2 is a flow diagram illustrating a data transmission method according to an embodiment of the invention;
FIG. 3a shows a schematic diagram of a transmission mode of one embodiment of the present invention;
FIG. 3b shows a schematic diagram of a transmission mode of another embodiment of the present invention;
FIG. 4 is a flow chart illustrating a data transmission method according to another embodiment of the present invention;
FIG. 5 shows a schematic diagram of a data transmission device of one embodiment of the present invention;
fig. 6 shows a schematic diagram of a data transmission device according to another embodiment of the present invention.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments of the present invention and features of the embodiments may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited to the specific embodiments disclosed below.
An embodiment of a first aspect of the present invention provides a data transmission method, which is applied to a terminal, and fig. 2 illustrates a flow diagram of the data transmission method according to an embodiment of the present invention. Wherein, the method comprises the following steps:
202, generating a channel access request signaling, where the channel access request signaling includes, when multiple data frames need to be sent in one transmission opportunity, an identification bit of a transmission mode selected according to the number of the multiple data frames, and when the identification bit is a first value, identifying the transmission mode in which all data are sent in sequence and all acknowledgement messages are received in sequence, and when the identification bit is a second value, identifying the transmission mode in which any data are sent and the next data are sent after the acknowledgement message corresponding to any data are received, and the transmission opportunity includes an uplink resource transmission opportunity and a downlink resource transmission opportunity;
In the data transmission method provided by the invention, a terminal generates a channel access request signaling, wherein the channel access request signaling comprises an identification bit, and the identification bit is used for identifying a transmission mode selected according to the number of a plurality of data frames when the plurality of data frames need to be sent in one transmission opportunity. When the identification bit is the first value, it indicates that the terminal adopts a transmission mode (as shown in fig. 3 a) of sequentially sending all data and then sequentially receiving all acknowledgement messages; when the identification bit is the second value, it indicates that the terminal adopts a transmission mode of sending any data and sending the next data after receiving the acknowledgement message corresponding to any data (as shown in fig. 3 b). Further, the channel access request signaling is sent to the base station, so that the terminal and the base station establish a handshake protocol, and the base station specifies the transmission mode of the terminal according to the identification bit. It should be noted that the transmission mode is determined according to the number of data frames that the terminal needs to send, and the transmission opportunity includes an uplink resource transmission opportunity and a downlink resource transmission opportunity, so that the terminal can select a suitable data transmission mode in the unlicensed spectrum, thereby improving the utilization efficiency of the spectrum.
Further, the transmission opportunity refers to including the allocated radio resource in frequency and the allocated time interval in time domain, for example, RU1 to RU10(RU means radio frequency part) in frequency, half a subframe (0.5ms) in time domain, or one subframe (1 ms).
In a specific embodiment, the terminal may be a network device such as a smart phone, a tablet computer, a notebook computer, a personal computer, and the like. It should be noted that the efficiency principle of efficient spectrum utilization can also be considered in selecting the transmission mode.
Fig. 4 is a flow chart of a data transmission method according to another embodiment of the present invention. Wherein, the method comprises the following steps:
In this embodiment, the channel access response signaling fed back by the base station to the channel access request signaling is received, and the data frame and the acknowledgement message of the received data frame are transmitted according to the selected transmission mode, and the MCS mode of transmitting the multiple data frames is the same as the MCS mode of receiving the acknowledgement message frame, for example, the MCS mode of transmitting the multiple data frames is MCS6, and then the MCS mode of receiving the acknowledgement message frame is also MCS6, so as to simplify the operation processes of coding modulation and decoding modulation.
In any of the above embodiments of the present invention, preferably, the method further comprises: when the number of the plurality of data frames is larger than the maximum number value of one-time transmission specified by a Media Access Control (MAC) layer, setting an identification bit as a first value; and when the number of the plurality of data frames is less than or equal to the maximum number value of one-time transmission specified by the MAC layer, setting the identification bit to be a second value.
In this embodiment, the identification bit is set to a first value when the number of the plurality of data frames is greater than a maximum number value of one-time transmissions specified by the MAC layer. When the number of the plurality of data frames is less than or equal to the maximum number value of one-time transmission specified by the MAC layer, setting the identification bit to be a second value, for example, the maximum number value of one-time transmission specified by the MAC layer is 10M, and when the number of the plurality of data frames exceeds 10M, setting the identification bit to be a first value of 0, and identifying a transmission mode of sequentially sending all data and then sequentially receiving all acknowledgement messages; and when the number of the data transmission channels does not exceed 10M, setting the identification bit to be a second value of '1', and identifying a transmission mode for transmitting any data and transmitting the next data after receiving a confirmation message corresponding to any data. The terminal can select a data transmission mode according to the number of data frames required to be sent, select a transmission mode of sequentially sending all data and then sequentially receiving all confirmation messages under the condition that the data frame data is large, select a transmission mode of sending any data and sending the next data after receiving the confirmation message corresponding to any data under the condition that the data frame data is small, and ensure accurate sending of the data and effective utilization of frequency spectrum.
In any of the above embodiments of the present invention, preferably, the channel access request signaling includes time-frequency resources that need to be occupied by multiple data frames, an MCS manner for transmitting the multiple data frames, and transmission power.
In this embodiment, the channel access request signaling includes, but is not limited to, time-frequency resources that need to be occupied by multiple data frames, MCS manners and transmission powers for transmitting the multiple data frames, and the like, so that the terminal and the base station successfully establish a handshake protocol, and the base station knows the transmission information (occupied resources, MCS manners and transmission powers) of the data frames transmitted by the terminal, and ensures that the base station correctly receives the data.
In any of the above embodiments of the present invention, preferably, the method further comprises: and setting the interval time between the data sending and the confirmation message receiving, wherein the interval time is the reaction time length of other terminals when the sensing channel is busy, and the reaction time lengths are defined consistently.
In this embodiment, an interval time between sending data and receiving an acknowledgement message, that is, an uplink and downlink switching point is set, where the interval time is a reaction time length for other terminals to sense that a channel is busy, so that the other terminals cannot occupy the channel, and the reaction time lengths of the terminals are defined consistently. Due to the fact that an LBT mode is adopted in the unlicensed frequency band, the access delay of the terminal sensing that the channel is busy is considered, the same access delay after the channel is sensed to be idle needs to be regulated for all the terminals according to the principle of fair access, and the access delay is 5us for example.
In any of the foregoing embodiments of the present invention, preferably, the acknowledgement message includes a data identifier, and the data identifier indicates a data transmission manner of the base station.
In this embodiment, the acknowledgement message sent by the base station to the terminal has a data identifier, which is used to identify the data transmission mode of the base station, such as MCS mode, transmission power, etc. of the data sent by the base station, so that the terminal can correctly receive the data sent by the base station.
In a second aspect of the present invention, a data transmission apparatus is provided, which is applied to a terminal, and fig. 5 shows a schematic diagram of a data transmission apparatus 50 according to an embodiment of the present invention. Wherein the device 50 comprises:
a processing module 502, configured to generate a channel access request signaling, where the channel access request signaling includes, when multiple data frames need to be sent in one transmission opportunity, an identification bit of a transmission mode selected according to the number of the multiple data frames, where the identification bit identifies the transmission modes of first sequentially sending all data and then sequentially receiving all acknowledgement messages when the identification bit is a first value, and the identification bit identifies the transmission mode of sending any data and sending the next data after receiving an acknowledgement message corresponding to any data when the identification bit is a second value, where the transmission opportunity includes an uplink resource transmission opportunity and a downlink resource transmission opportunity;
a sending module 504, configured to send a channel access request signaling to a base station.
In the data transmission apparatus 50 provided by the present invention, the terminal generates the channel access request signaling, where the channel access request signaling includes an identification bit, and the identification bit is used to identify a transmission mode selected according to the number of multiple data frames when multiple data frames need to be sent in one transmission opportunity. When the identification bit is the first value, it indicates that the terminal adopts a transmission mode (as shown in fig. 3 a) of sequentially sending all data and then sequentially receiving all acknowledgement messages; when the identification bit is the second value, it indicates that the terminal adopts a transmission mode of sending any data and sending the next data after receiving the acknowledgement message corresponding to any data (as shown in fig. 3 b). Further, the channel access request signaling is sent to the base station, so that the terminal and the base station establish a handshake protocol, and the base station specifies the transmission mode of the terminal according to the identification bit. It should be noted that the transmission mode is determined according to the number of data frames that the terminal needs to send, and the transmission opportunity includes an uplink resource transmission opportunity and a downlink resource transmission opportunity, so that the terminal can select a suitable data transmission mode in the unlicensed spectrum, thereby improving the utilization efficiency of the spectrum.
Further, the transmission opportunity refers to including the allocated radio resource in frequency and the allocated time interval in time domain, for example, RU1 to RU10(RU means radio frequency part) in frequency, half a subframe (0.5ms) in time domain, or one subframe (1 ms).
In a specific embodiment, the terminal may be a network device such as a smart phone, a tablet computer, a notebook computer, a personal computer, and the like. The processing module 502 may be a central processor or a baseband processor, etc., and the transmitting module 504 may be a transmitter or an antenna, etc. It should be noted that the efficiency principle of efficient spectrum utilization can also be considered in selecting the transmission mode.
Fig. 6 shows a schematic diagram of a data transmission device 60 according to another embodiment of the invention. Wherein the device 60 comprises:
a processing module 602, configured to generate a channel access request signaling, where the channel access request signaling includes, when multiple data frames need to be sent in one transmission opportunity, an identification bit of a transmission mode selected according to the number of the multiple data frames, where the identification bit is a first value and identifies a transmission mode in which all data are sent in sequence and then all acknowledgement messages are received in sequence, and when the identification bit is a second value, the processing module identifies a transmission mode in which any data is sent and a next data is sent after an acknowledgement message corresponding to any data is received, where the transmission opportunity includes an uplink resource transmission opportunity and a downlink resource transmission opportunity;
a sending module 604, configured to send a channel access request signaling to a base station;
a receiving module 606, configured to receive a channel access response signaling sent by a base station, and send a plurality of data frames to the base station according to a selected transmission mode and receive an acknowledgement message of each data frame from the base station, where an MCS mode of the plurality of data frames is the same as an MCS mode of the acknowledgement message frame.
In this embodiment, the channel access response signaling fed back by the base station to the channel access request signaling is received, and the data frame and the acknowledgement message of the received data frame are transmitted according to the selected transmission mode, and the MCS mode of transmitting the multiple data frames is the same as the MCS mode of receiving the acknowledgement message frame, for example, the MCS mode of transmitting the multiple data frames is MCS6, and then the MCS mode of receiving the acknowledgement message frame is also MCS6, so as to simplify the operation processes of coding modulation and decoding modulation.
In a specific embodiment, the terminal may be a network device such as a smart phone, a tablet computer, a notebook computer, a personal computer, and the like. The processing module 602 may be a central processor, a baseband processor, or the like, the transmitting module 604 may be a transmitter, an antenna, or the like, and the receiving module 606 may be a receiver, an antenna, or the like.
In the above embodiment of the present invention, preferably, the processing module 602 is further configured to set the identification bit to a first value when the number of the plurality of data frames is greater than a maximum number value of one-time transmission specified by the MAC layer; and when the number of the plurality of data frames is less than or equal to the maximum number value of one-time transmission specified by the MAC layer, setting the identification bit to be a second value.
In this embodiment, the identification bit is set to a first value when the number of the plurality of data frames is greater than a maximum number value of one-time transmissions specified by the MAC layer. When the number of the plurality of data frames is less than or equal to the maximum number value of one-time transmission specified by the MAC layer, setting the identification bit to be a second value, for example, the maximum number value of one-time transmission specified by the MAC layer is 10M, and when the number of the plurality of data frames exceeds 10M, setting the identification bit to be a first value of 0, and identifying a transmission mode of sequentially sending all data and then sequentially receiving all acknowledgement messages; and when the number of the data transmission channels does not exceed 10M, setting the identification bit to be a second value of '1', and identifying a transmission mode for transmitting any data and transmitting the next data after receiving a confirmation message corresponding to any data. The terminal can select a data transmission mode according to the number of data frames required to be sent, select a transmission mode of sequentially sending all data and then sequentially receiving all confirmation messages under the condition that the data frame data is large, select a transmission mode of sending any data and sending the next data after receiving the confirmation message corresponding to any data under the condition that the data frame data is small, and ensure accurate sending of the data and effective utilization of frequency spectrum.
In any of the above embodiments of the present invention, preferably, the channel access request signaling includes time-frequency resources that need to be occupied by multiple data frames, an MCS manner for transmitting the multiple data frames, and transmission power.
In this embodiment, the channel access request signaling includes, but is not limited to, time-frequency resources that need to be occupied by multiple data frames, MCS manners and transmission powers for transmitting the multiple data frames, and the like, so that the terminal and the base station successfully establish a handshake protocol, and the base station knows the transmission information (occupied resources, MCS manners and transmission powers) of the data frames transmitted by the terminal, and ensures that the base station correctly receives the data.
In any of the above embodiments of the present invention, preferably, the processing module 602 is further configured to set an interval time between sending data and receiving an acknowledgement message, where the interval time is a reaction duration when the sensing channel of the other terminal is busy, and the reaction durations are defined to be consistent.
In this embodiment, an interval time between sending data and receiving an acknowledgement message, that is, an uplink and downlink switching point is set, where the interval time is a reaction time length for other terminals to sense that a channel is busy, so that the other terminals cannot occupy the channel, and the reaction time lengths of the terminals are defined consistently. Due to the fact that an LBT mode is adopted in the unlicensed frequency band, the access delay of the terminal sensing that the channel is busy is considered, the same access delay after the channel is sensed to be idle needs to be regulated for all the terminals according to the principle of fair access, and the access delay is 5us for example.
In any of the foregoing embodiments of the present invention, preferably, the acknowledgement message includes a data identifier, and the data identifier indicates a data transmission manner of the base station.
In this embodiment, the acknowledgement message sent by the base station to the terminal has a data identifier, which is used to identify the data transmission mode of the base station, such as MCS mode, transmission power, etc. of the data sent by the base station, so that the terminal can correctly receive the data sent by the base station.
An embodiment of a third aspect of the present invention provides a communication device, including the data transmission apparatus in any of the above technical solutions.
The communication device provided by the invention comprises the data transmission device of any technical scheme, and can realize all the beneficial effects of the data transmission device of any technical scheme.
In the description herein, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance unless explicitly stated or limited otherwise; the terms "connected," "mounted," "secured," and the like are to be construed broadly and include, for example, fixed connections, removable connections, or integral connections; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (13)
1. A data transmission method, applied to a terminal, the method comprising:
generating a channel access request signaling, wherein the channel access request signaling includes an identification bit of a transmission mode selected according to the number of a plurality of data frames when the plurality of data frames need to be sent in one transmission opportunity, the identification bit identifies the transmission mode of sequentially sending all the data and then sequentially receiving all the acknowledgement messages when the identification bit is a first value, the identification bit identifies the transmission mode of sending any one of the data and sending the next data after receiving the acknowledgement message corresponding to any one of the data when the identification bit is a second value, and the transmission opportunity includes an uplink resource transmission opportunity and a downlink resource transmission opportunity;
and sending the channel access request signaling to a base station.
2. The data transmission method according to claim 1, further comprising:
when the number of the plurality of data frames is larger than the maximum number value of one-time transmission specified by the MAC layer, setting the identification bit as the first value; setting the identification bit to the second value when the number of the plurality of data frames is less than or equal to the maximum number value of the one-time transmission specified by the MAC layer.
3. The data transmission method according to claim 1,
the channel access request signaling comprises time-frequency resources occupied by the data frames, MCS modes for transmitting the data frames and transmission power.
4. The data transmission method according to any one of claims 1 to 3, further comprising:
and setting the interval time between the sending of the data and the receiving of the confirmation message, wherein the interval time is the reaction time length of other terminals when sensing channels are busy, and the reaction time lengths are defined consistently.
5. The data transmission method according to any one of claims 1 to 3, wherein after the sending the channel access request signaling to a base station, further comprising:
and receiving a channel access response signaling sent by the base station, sending the plurality of data frames to the base station according to the selected transmission mode, and receiving an acknowledgement message of each data frame by the base station, wherein the MCS modes of the plurality of data frames are the same as the MCS mode of the acknowledgement message frame.
6. The data transmission method according to any one of claims 1 to 3, wherein the acknowledgement message includes a data identifier, and the data identifier indicates a data transmission mode of the base station.
7. A data transmission apparatus, applied to a terminal, the apparatus comprising:
a processing module, configured to generate a channel access request signaling, where the channel access request signaling includes an identifier bit of a transmission mode selected according to the number of multiple data frames when multiple data frames need to be sent in one transmission opportunity, where the identifier bit identifies the transmission mode in which all the data are sent in sequence and then all the acknowledgment messages are received in sequence when the identifier bit is a first value, and the identifier bit identifies the transmission mode in which any one of the data is sent and the next data is sent after the acknowledgment message corresponding to any one of the data is received when the identifier bit is a second value, where the transmission opportunity includes an uplink resource transmission opportunity and a downlink resource transmission opportunity;
and the sending module is used for sending the channel access request signaling to a base station.
8. The data transmission apparatus of claim 7,
the processing module is further configured to set the identification bit to the first value when the number of the plurality of data frames is greater than a maximum number value of one-time transmission specified by the MAC layer; setting the identification bit to the second value when the number of the plurality of data frames is less than or equal to the maximum number value of the one-time transmission specified by the MAC layer.
9. The data transmission apparatus of claim 7,
the channel access request signaling comprises time-frequency resources occupied by the data frames, MCS modes for transmitting the data frames and transmission power.
10. The data transmission apparatus according to any one of claims 7 to 9,
the processing module is further configured to set an interval time between sending the data and receiving the acknowledgement message, where the interval time is a reaction time length when the sensing channel of the other terminal is busy, and the reaction time lengths are defined consistently.
11. The data transmission apparatus according to any one of claims 7 to 9, characterized by further comprising:
a receiving module, configured to receive a channel access response signaling sent by the base station, send the multiple data frames to the base station according to the selected transmission mode, and receive an acknowledgement message of each data frame from the base station, where an MCS mode of the multiple data frames is the same as an MCS mode of the acknowledgement message frame.
12. The data transmission apparatus according to any one of claims 7 to 9, wherein the acknowledgement message includes a data identifier, and the data identifier indicates a data transmission mode of the base station.
13. A communication device, comprising:
a data transmission arrangement as claimed in any one of claims 7 to 12.
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