WO2022011725A1 - 一种数据传输方法及装置 - Google Patents

一种数据传输方法及装置 Download PDF

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Publication number
WO2022011725A1
WO2022011725A1 PCT/CN2020/102876 CN2020102876W WO2022011725A1 WO 2022011725 A1 WO2022011725 A1 WO 2022011725A1 CN 2020102876 W CN2020102876 W CN 2020102876W WO 2022011725 A1 WO2022011725 A1 WO 2022011725A1
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WO
WIPO (PCT)
Prior art keywords
logical channel
data
time
node
frequency resource
Prior art date
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PCT/CN2020/102876
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English (en)
French (fr)
Inventor
刘航
杨常青
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN202080103042.1A priority Critical patent/CN115836562B/zh
Priority to EP20945167.3A priority patent/EP4185031A4/en
Priority to CN202311517192.9A priority patent/CN117715192A/zh
Priority to JP2023503103A priority patent/JP2023534056A/ja
Priority to PCT/CN2020/102876 priority patent/WO2022011725A1/zh
Publication of WO2022011725A1 publication Critical patent/WO2022011725A1/zh
Priority to US18/155,450 priority patent/US20230156770A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • H04W28/065—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information using assembly or disassembly of packets
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/543—Allocation or scheduling criteria for wireless resources based on quality criteria based on requested quality, e.g. QoS
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

Definitions

  • the embodiments of the present application relate to the field of communication technologies, and in particular, to a data transmission method and apparatus.
  • in-vehicle wireless can further reduce the number, length, and weight of in-vehicle wiring harnesses, as well as the corresponding installation, maintenance, and maintenance costs.
  • In-vehicle communication technology has a trend of gradual wirelessization. With the diversification of in-vehicle applications, the number and types of in-vehicle communication nodes are increasing, which puts forward higher requirements for the ability of in-vehicle communication.
  • the devices involved in the smart cockpit mainly include a cockpit domain controller (CDC) and terminal devices.
  • the terminal equipment includes on-board terminal equipment such as on-board displays, on-board speakers, and on-board microphones, and also includes off-board terminal equipment such as smart terminals.
  • the cockpit domain controller and the above-mentioned terminal device are connected in a wired manner to realize data transmission between the two.
  • the wired connection method will be restricted by factors such as cable cost and in-vehicle wiring. Therefore, more and more solutions are trying to realize the connection between the cockpit domain controller and the terminal device based on the wireless method, so that the two can be connected based on the wireless method.
  • the established wireless connection is used for data transmission.
  • the transmitted data packet is a small packet with a small amount of data
  • it will seriously affect the proportion of the payload in the time-frequency resources, thus greatly increasing the system overhead.
  • segmenting the data at the sending end and splicing the segmented data at the receiving end also increases the processing delay.
  • the present application provides a data transmission method and device, which are beneficial to improve transmission efficiency and reduce system overhead and delay.
  • the present application provides a data transmission method, which can be applied to a communication system.
  • the communication system may include multiple transmission nodes, and data transmission may be performed between the multiple transmission nodes.
  • the method includes: the second node receiving the first configuration information from the first node.
  • the first configuration information is used to configure the first time-frequency resource.
  • the second node acquires the first information corresponding to the first logical channel, where the first information is used to indicate whether to allow the data packet in the first logical channel to be segmented, the first logical channel corresponds to the second time-frequency resource, the second time-frequency
  • the resource is included in the first time-frequency resource.
  • the second node sends the first data to the first node through the first time-frequency resource.
  • the first information can indicate that the data in the first logical channel is not allowed to be segmented, so as to avoid segmenting the small packets, thereby improving the efficiency of time-frequency resources.
  • the proportion of the load is reduced, and the system overhead and delay are reduced.
  • the data packet in the first logical channel can be transmitted through the second time-frequency resource corresponding to the first logical channel when the data packet in the first logical channel needs to be transmitted.
  • it will be affected by the content indicated by the first information. For example, if the first information is used to indicate that the data packet in the first logical channel is not allowed to be segmented, then when the first logical channel is sent through the second time-frequency resource, the In such a scenario that the data packets in the first logical channel are segmented, the data packets in the first logical channel cannot be sent through the second time-frequency resource.
  • whether the data packet in the first logical channel can be sent through the second time-frequency resource corresponding to the first logical channel is also affected by the size of the second time-frequency resource.
  • whether to send the data packet in the first logical channel through the second time-frequency resource may be specifically determined according to at least one of the first information and the second time-frequency resource.
  • the first data does not include data packets in the first logical channel, and:
  • the first information is used to indicate that data packets in the first logical channel are not allowed to be segmented, and the size of the second time-frequency resource is insufficient to carry all the data packets in the first logical channel.
  • the first information is used to indicate that the segmentation of the data packets in the first logical channel is not allowed, and the size of the second time-frequency resource is not enough to carry all the data packets in the first logical channel , the first data does not include the data packets in the first logical channel. In this way, fragmentation of the data packets in the first logical channel can be avoided.
  • the first information indicates that the data packet in the first logical channel is not allowed to be segmented, it can be determined whether the size of the second time-frequency resource is sufficient to carry the first logical channel.
  • the data packets in the first logical channel are not sent through the second time-frequency resource.
  • data does not contain data packets in the first logical channel) to avoid fragmentation of the data packets in the first logical channel.
  • the first information is used to indicate that the data packet in the first logical channel is not allowed to be segmented, and the size of the second time-frequency resource is insufficient to carry any data in the first logical channel packet or the first packet.
  • the first information is used to indicate that data packet segmentation in the first logical channel is not allowed, and the size of the second time-frequency resource is not enough to carry any data in the first logical channel packet or the first data packet, the first data does not include the data packet in the first logical channel. In this way, fragmentation of the data packets in the first logical channel can be avoided.
  • the first information indicates that the data packet in the first logical channel is not allowed to be segmented: it can be determined whether the size of the second time-frequency resource is sufficient to carry the first logical channel.
  • any data packet in the logical channel if it is determined that the size of the second time-frequency resource is not enough to carry any data packet in the first logical channel, then this part of the data packet in the first logical channel is not sent through the second time-frequency resource. way to avoid segmenting the data packets in the first logical channel; or, in the case that the data packets in the first logical channel correspond to a sending order, it can be judged whether the size of the second time-frequency resource is sufficient to carry the first logical channel.
  • the data packet in the first logical channel will not be sent through the second time-frequency resource in this way to avoid fragmentation of the data packets in the first logical channel.
  • the first data includes all data packets in the first logical channel.
  • the size of the second time-frequency resource is sufficient to carry all the data packets in the first logical channel. That is to say, after it is determined that the size of the second time-frequency resource is sufficient to carry all the data packets in the first logical channel, without considering the content indicated by the first information, the first data can be made to include all the data packets in the first logical channel.
  • the data packets are sent by sending the data packets in the first logical channel, for example, all data packets in the first logical channel may be carried in the second time-frequency resource for sending.
  • the processing process of the second node can be simplified under the condition that the size of the second time-frequency resource is sufficient to carry all the data packets in the first logical channel, that is, the first information can be not processed. , all data packets in the first logical channel are sent.
  • the first data includes at least one data packet in the first logical channel.
  • the first information is used to indicate that the data packet in the first logical channel is not allowed to be segmented.
  • the size of the second time-frequency resource is insufficient to carry all the data packets in the first logical channel and the size of the second time-frequency resource is sufficient to carry the above-mentioned at least one data packet.
  • the size of the second time-frequency resource is not enough to carry all the data packets in the first logical channel, but The size of the second time-frequency resource is sufficient to carry at least one data packet in the first logical channel, and the data may be transmitted in such a way that the first data includes at least one data packet in the first logical channel.
  • the first logical channel corresponds to the first data queue
  • the data packets in the first logical channel include service data packets
  • the data packets in the first logical channel Contains control signaling.
  • the service data in the first logical channel can be guaranteed. Packets are not fragmented during transmission.
  • the data packet in the first logical channel refers to control signaling
  • the first logical channel corresponds to the first protocol stack entity
  • the data packet in the first logical channel is the service data unit SDU in the first protocol stack entity. Based on the above design, whether to allow the service data unit in the first protocol stack entity to be segmented may be indicated through the first information.
  • acquiring the first information corresponding to the first logical channel includes: receiving second configuration information from the first node; the second configuration information is used to configure the first logical channel corresponding to the first logical channel. first information. Based on the above design, whether to allow the data packet in the first logical channel to be segmented may be controlled by the first node.
  • acquiring the first information corresponding to the first logical channel includes: determining the first information according to the QoS information or service type corresponding to the data in the first logical channel.
  • the first information corresponding to a logical channel Based on the above design, the sending mode of the data packets in the first logical channel can be matched with the QoS information or service type corresponding to the first logical channel.
  • the first data includes at least one data packet in the second logical channel. Based on the above design, data packets of multiple logical channels may be carried in the first data.
  • the priority of the second logical channel is lower than the priority of the first logical channel. Based on the above design, data packets of multiple logical channels with different priorities may be carried in the first data.
  • the present application provides a data transmission method.
  • the method includes: a first node sending first configuration information and second configuration information to a second node.
  • the first configuration information is used to configure the first time-frequency resource;
  • the second configuration information is used to indicate whether to allow the data packet in the first logical channel to be segmented.
  • the first logical channel corresponds to the second time-frequency resource, and the second time-frequency resource is included in the first time-frequency resource.
  • the first node receives the first data from the second node through the first time-frequency resource.
  • the second node when the second node sends the data packet in the first logical channel, it can control whether to allow the data packet in the first logical channel to be segmented. Further, when the first logical channel is used to transmit small packets, the first information can indicate that the data packets in the first logical channel are not allowed to be segmented, so as to avoid segmenting the small packets, thereby improving the time-frequency resources. The proportion of payload, reducing system overhead.
  • the first logical channel corresponds to the first data queue
  • the data packets in the first logical channel include service data packets
  • the data packets in the first logical channel Contains control signaling.
  • the service data in the first logical channel can be guaranteed. Packets are not fragmented during transmission.
  • the data packet in the first logical channel refers to control signaling
  • the first logical channel corresponds to the first protocol stack entity
  • the data packet in the first logical channel is the service data unit SDU in the first protocol stack entity. Based on the above design, whether to allow the service data unit in the first protocol stack entity to be segmented may be indicated through the first information.
  • the first data includes at least one data packet in the second logical channel. Based on the above design, data packets of multiple logical channels may be carried in the first data.
  • the priority of the second logical channel is lower than the priority of the first logical channel. Based on the above design, data packets of multiple logical channels with different priorities can be carried in the first data.
  • the present application provides a communication method, the method comprising: a second node receiving a first system broadcast message from a first node.
  • the first system broadcast message includes the identity information of the first node.
  • the second node After determining that the identity information of the first node is consistent with the preset identity information, the second node sends an access request to the first node.
  • the second node before the second node sends an access request to the first node, the second node verifies the identity information of the first node, and then sends the access request to the first node after the verification is successful.
  • the second node is prevented from sending an access request to a wrong node. For example, when the second node is an on-board or off-board device in the cockpit domain, and the first node is a CDC, it can be avoided that the second node establishes a connection with a CDC on other vehicles in the outside world.
  • the identity information of the first node may be at least one of a device identification of the first node, a media access control (media access control, MAC) address, a soft address, and a short address.
  • a media access control media access control, MAC
  • the present application provides a communication method, the method comprising: a first node sending a first system broadcast message to a second node.
  • the first system broadcast message includes the identity information of the first node.
  • the first node receives an access request from the second node.
  • the identity information of the first node may be at least one of a device identification of the first node, a media access control (media access control, MAC) address, a soft address, and a short address.
  • a media access control media access control, MAC
  • the present application provides a communication method, the method comprising: a second node receiving access resource configuration information from a first node.
  • the access resource configuration information is used to configure access resources for establishing a connection (also referred to as access) with the first node.
  • the second node sends an access request to the first node on the configured access resource.
  • the access resource configuration information further includes information about the access mode corresponding to the access resource, or the access resource configuration information is also used to indicate the access resource corresponding to the access resource. access method.
  • the access resource configuration information may be system information (System information) or RRC signaling.
  • the second node when the access mode is contention access, randomly selects a first resource from the access resources, and sends an access request to the first node on the first resource. input request.
  • sending an access request to the first node on the first resource may include sending an access request to the first node on the first resource and sending the first node the second node's second identity information.
  • the second node determines the second resource from the access resources according to the second identity information of the second node, and performs a Send an access request to the first node on the second resource.
  • the sending the access request to the first node on the second resource may include sending the third identity information of the second node to the first node on the second resource.
  • the second identity information and the third identity information may be the same or different, and the second identity information or the third identity information may be a device identification, a media access control (media access control, MAC) address , at least one of soft address and short address.
  • media access control media access control, MAC
  • the present application provides a communication method, the method comprising: a first node sending access resource configuration information to a second node.
  • the access resource configuration information is used to configure access resources for establishing a connection (also referred to as access) with the first node.
  • the first node receives an access request from the second node through the access resource.
  • the access resource configuration information further includes information about the access mode corresponding to the access resource, or the access resource configuration information is also used to indicate the access resource corresponding to the access resource. access method.
  • the access resource configuration information may be system information (System information) or RRC signaling.
  • the present application provides a data transmission device, and the data transmission device may be a chip or a system-on-chip.
  • the data transmission apparatus may implement the functions performed in the above-mentioned first aspect or possible designs of the first aspect. These functions can be implemented by hardware or by executing corresponding software by hardware.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the data transmission apparatus may include: a receiving unit, configured to receive first configuration information from a first node, where the first configuration information is used to configure a first time-frequency resource; an obtaining unit, configured to obtain a first logical channel Corresponding first information, where the first information is used to indicate whether the data packet in the first logical channel is allowed to be segmented; wherein, the first logical channel corresponds to a second time-frequency resource, and the second time-frequency resource is The frequency resource is included in the first time-frequency resource; the sending unit is configured to send the first data to the first node through the first time-frequency resource.
  • the data transmission apparatus may also include more or less units for implementing other functions of the terminal device.
  • the present application provides a data transmission device, and the data transmission device may be a chip or a system-on-chip.
  • the data transmission apparatus may implement the functions performed in the above-mentioned second aspect or possible designs of the second aspect. These functions can be implemented by hardware or by executing corresponding software by hardware.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the data transmission apparatus may include: a sending unit, configured to send the first configuration information to the second node; the configuration information is used to configure the first time-frequency resource; the sending unit is further used for the second configuration information; The second configuration information is used to indicate whether to allow segmenting of data packets in the first logical channel; the first logical channel corresponds to a second time-frequency resource, and the second time-frequency resource is included in the first time-frequency resource. and a receiving unit, configured to receive the first data from the second node through the first time-frequency resource.
  • the data transmission apparatus may also include more or less units for implementing other functions of the terminal device.
  • the present application provides a data transmission device, and the data transmission device may be a chip or a system-on-chip.
  • the data transmission apparatus may implement the functions performed in the third aspect or the possible designs of the third aspect. These functions can be implemented by hardware or by executing corresponding software by hardware.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the data transmission apparatus may include: a receiving unit configured to receive the first system broadcast message from the first node. Wherein, the first system broadcast message includes the identity information of the first node.
  • the sending unit sends an access request to the first node after determining that the identity information of the first node is consistent with the preset identity information.
  • the data transmission apparatus may also include more or less units for implementing other functions of the terminal device.
  • the present application provides a data transmission device, and the data transmission device may be a chip or a system-on-chip.
  • the data transmission apparatus can implement the functions performed in the fourth aspect or the possible designs of the fourth aspect. These functions can be implemented by hardware or by executing corresponding software by hardware.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the data transmission apparatus may include: a sending unit for sending the first system broadcast message to the second node. Wherein, the first system broadcast message includes the identity information of the first node.
  • the receiving unit receives the access request from the second node.
  • the data transmission apparatus may also include more or less units for implementing other functions of the terminal device.
  • the present application provides a data transmission device, and the data transmission device may be a chip or a system-on-chip.
  • the data transmission apparatus can implement the functions performed in the fifth aspect or the possible designs of the fifth aspect. These functions can be implemented by hardware or by executing corresponding software by hardware.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the data transmission apparatus may include: a receiving unit configured to receive access resource configuration information from the first node.
  • the access resource configuration information is used to configure access resources for establishing a connection (also referred to as access) with the first node.
  • the sending unit is used for the second node to send an access request to the first node on the configured access resource.
  • the data transmission apparatus may also include more or less units for implementing other functions of the terminal device.
  • the present application provides a data transmission device, and the data transmission device may be a chip or a system-on-chip.
  • the data transmission apparatus may implement the functions performed in the third aspect or the possible designs of the third aspect. These functions can be implemented by hardware or by executing corresponding software by hardware.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the data transmission apparatus may include: a sending unit, configured to send the access resource configuration information to the second node.
  • the access resource configuration information is used to configure access resources for establishing a connection (also referred to as access) with the first node.
  • the receiving unit is used for the first node to receive the access request from the second node through the access resource.
  • the data transmission apparatus may also include more or less units for implementing other functions of the terminal device.
  • the present application provides a data transmission apparatus, the data transmission apparatus comprising one or more processors coupled with one or more memories.
  • the one or more memories store computer instructions.
  • the one or more processors execute the computer instructions, it causes the data transmission apparatus to execute the data transmission method executed by the second node in the first aspect or a possible design of the first aspect, or, when the one or more processors
  • each processor executes the computer instructions, it causes the data transmission apparatus to execute the second aspect or the data transmission method executed by the first node in the possible designs of the second aspect, or, when the one or more processors execute the data transmission method
  • the computer instruction is used, the data transmission apparatus is caused to execute the third aspect or the communication method executed by the second node in the possible design of the third aspect.
  • the data transmission apparatus is caused to execute the communication method executed by the first node in the fourth aspect or possible designs of the fourth aspect.
  • the data transmission apparatus is caused to execute the communication method executed by the second node in the fifth aspect or possible designs of the fifth aspect.
  • the data transmission apparatus is caused to execute the above-mentioned sixth aspect or the communication method executed by the first node in the possible designs of the sixth aspect.
  • the present application provides a computer-readable storage medium, where instructions are stored in the computer-readable storage medium.
  • the first aspect or the second possible design in the first aspect is executed.
  • the data transmission method executed by the node or, when the instruction is executed, execute the data transmission method executed by the first node in the second aspect or a possible design in the second aspect, or, when the instruction is executed, execute the above-mentioned data transmission method
  • the communication method executed by the second node in the third aspect or the possible design of the third aspect when the instruction is executed, executes the above-mentioned fourth aspect or the data transmission method executed by the first node in the possible design of the fourth aspect , or, when the instruction is executed, execute the data transmission method executed by the second node in the possible design in the fifth aspect or the fifth aspect, or, when the instruction is executed, execute the sixth aspect or the sixth aspect
  • the present application provides a computer program product comprising instructions that, when run on a computer, enable the computer to perform the data transmission performed by the second node in the first aspect or a possible design of the first aspect.
  • the method alternatively, enables the computer to execute the data transmission method executed by the first node in the second aspect or the possible design in the second aspect, or enables the computer to execute the third aspect or the possible design in the third aspect.
  • the communication method performed by the second node, or enables the computer to perform the fourth aspect or the data transmission method performed by the first node in the possible design of the fourth aspect, or enables the computer to perform the fifth aspect or the fourth aspect.
  • the data transmission method performed by the second node in the possible design in the fifth aspect, or the computer can execute the above-mentioned sixth aspect or the communication method performed by the first node in the possible design in the sixth aspect.
  • the present application provides a chip, the chip includes a processing circuit and an interface; the processing circuit is configured to call from a storage medium and run a computer program stored in the storage medium to execute the first aspect or the first aspect above.
  • the data transmission method provided in the possible design either to perform the data transmission method as provided in the above-mentioned second aspect or the possible design of the second aspect, or to perform the above-mentioned third aspect or the third aspect possible
  • the present application provides a data transmission system, which includes two or more data transmission apparatuses as provided in the seventh to twelfth aspects.
  • the present application protects a cockpit system, which includes the data transmission device described in the seventh aspect or the ninth aspect, and/or the data transmission device described in the eighth aspect or the tenth aspect. .
  • the present application protects a terminal, where the terminal may be a means of transport or a smart device, including drones, unmanned transport vehicles, smart cars, or robots.
  • the terminal includes the cockpit system described above.
  • any one of the design manners of the seventh aspect to the nineteenth aspect may correspond to the above-mentioned first aspect to the sixth aspect, and therefore can bring similar technical effects, which will not be repeated here.
  • FIG. 1 is one of the schematic structural diagrams of a communication system provided by an embodiment of the present application.
  • FIG. 2 is the second schematic structural diagram of a communication system provided by an embodiment of the present application.
  • 3A is a schematic diagram 1 of a format of a MAC PDU provided by an embodiment of the present application.
  • 3B is a schematic diagram 2 of a format of a MAC PDU provided by an embodiment of the present application.
  • FIG. 4 is a schematic diagram of an encapsulation process of an RLC PDU according to an embodiment of the present application.
  • FIG. 5 is a schematic flowchart of a data transmission method provided by an embodiment of the present application.
  • FIG. 6 is one of the schematic flowcharts of a communication method provided by an embodiment of the present application.
  • FIG. 7 is the second schematic flowchart of a communication method provided by an embodiment of the present application.
  • FIG. 8 is one of the schematic structural diagrams of a data transmission apparatus according to an embodiment of the present application.
  • FIG. 9 is a second schematic structural diagram of a data transmission apparatus provided by an embodiment of the present application.
  • FIG. 10 is a third schematic structural diagram of a data transmission apparatus provided by an embodiment of the present application.
  • FIG. 11 is a fourth schematic structural diagram of a data transmission apparatus provided by an embodiment of the present application.
  • FIG. 12 is a fifth schematic structural diagram of a data transmission apparatus provided by an embodiment of the application.
  • FIG. 13 is a sixth schematic structural diagram of a data transmission apparatus provided by an embodiment of the application.
  • FIG. 14 is a seventh schematic structural diagram of a data transmission apparatus provided by an embodiment of the present application.
  • FIG. 15 is a schematic structural diagram of a chip according to an embodiment of the present application.
  • words such as “first” and “second” are used to distinguish the same or similar items with basically the same function and effect.
  • the words “first”, “second” and the like do not limit the quantity and execution order, and the words “first”, “second” and the like are not necessarily different.
  • words such as “exemplary” or “for example” are used to represent examples, illustrations or illustrations. Any embodiments or designs described in the embodiments of the present application as “exemplary” or “such as” should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as “exemplary” or “such as” is intended to present the related concepts in a specific manner to facilitate understanding.
  • Logical channel Generally, different services often have different Quality of Service (QoS) requirements, so different logical channels can be established for different services to ensure the differentiated QoS requirements of different services. For example, separate logical channels are established for audio services and video services. Of course, it can be understood that the same logical channel can also be established for one or more services with similar QoS requirements, thereby reducing the number of logical channels and facilitating management.
  • QoS Quality of Service
  • a logical channel is an abstract concept, and data in different logical channels corresponds to one or more types of service data in the logical channel.
  • the service data may be service data packets, and the service data may also be a service data packet queue.
  • logical channels are distinguished according to the attributes of the transmission content.
  • logical channels can be divided into two categories: control channels and traffic channels.
  • Control channels are used to transmit control plane information
  • traffic channels are used to transmit user plane information (eg, traffic data).
  • the control channel can be further divided into a common control channel and a dedicated control channel.
  • one logical channel may correspond to one or more protocol entities.
  • a single logical channel corresponds to a single radio link control layer (radio link control, RLC) entity.
  • the user plane protocol stack of the LTE system includes a data convergence protocol layer (Packet Data Convergence Protocol, PDCP), an RLC layer, a media access layer (Media Access Control, MAC) layer and a physical layer (Physical, PHY).
  • the present invention refers to the service data packet, for example, the IP data packet transmitted from the network layer, the data packet will be transmitted to the PDCP entity.
  • the IP data packet will be regarded as a PDCP layer SDU (Service Date Unit), and the PDCP entity will process the IP data packet, such as adding PDCP layer header information to the data packet, and the data after processing is called PDCP PDU.
  • PDCP layer SDU Service Date Unit
  • the PDCP PDU will be passed to the RLC layer through the inter-layer service unit (Service Access Point, SAP), then the PDCP PDU will be regarded as the RLC layer SDU, processed by the RLC layer, for example Add the RLC layer header, and then generate the RLC PDU.
  • SAP Service Access Point
  • the peer protocol layer will parse the packet header, for example, remove the packet header, and obtain the SDU.
  • the generated PDU contains SDU, and the size is equal to SDU, and does not contain any packet header information, which can be understood as transparent transmission (Transparency), referred to as transparent transmission.
  • Transparency transparent transmission
  • the present invention does not limit the composition of a specific protocol stack, because it does not limit the specific protocol entity corresponding to the logical channel.
  • the logical channel of the present invention may correspond to the RLC entity, then the data in the logical channel corresponds to the SDU of the RLC layer, and the data in the logical channel is not segmented, that is, the RLC SDU is not segmented; or, the logical channel of the present invention may Corresponding to the PDCP entity, the data in the logical channel corresponds to the PDCP layer SDU, and the data in the logical channel is not segmented, that is, the PDCP SDU is not segmented.
  • the protocol stack may also include other layers, and the names may be completely different, which is not limited in the present invention.
  • FIG. 1 shows a schematic structural diagram of a communication system 100 provided by an embodiment of the present application, the communication system 100 includes at least one communication domain, and FIG. 1 shows a communication domain 110 , where the communication domain 110 includes a master node 111 and at least one slave node 112. As shown in FIG. 1 as including two slave nodes 112 .
  • the master node 111 in the embodiments of the present application refers to a device capable of communicating with the slave node 112 and having the capability of managing the slave node 112 (eg, scheduling resources for the slave node 112 ).
  • slave node 112 described in the embodiments of the present application refers to a device that can obey the management of the master node 111 and has the ability to communicate using the resources allocated by the master node 111 .
  • the communication domain 110 may be applicable to various environments, which is not limited in this embodiment of the present application.
  • the communication domain 110 may be applicable to a cabin (also referred to as a cabin) environment of a motor vehicle (eg, a smart car, an electric car, a digital car, etc.).
  • a cabin also referred to as a cabin
  • a motor vehicle eg, a smart car, an electric car, a digital car, etc.
  • the communication domain 110 may be suitable for a smart home environment.
  • the master node 111 and the slave node 112 may communicate in various manners, which are not limited in this embodiment of the present application.
  • the master node 111 may communicate with the slave node 112 wirelessly.
  • the above wireless manner may be to implement communication through a communication network.
  • the communication network may be a local area network, or a wide area network switched by a relay device, or includes a local area network and a wide area network.
  • the communication network may be a wifi hotspot network, a wifi peer-to-peer (wifi P2P) network, a bluetooth network, a zigbee network, a near field communication (near field communication) network communication, NFC) network or a possible general short-range communication network in the future.
  • the communication network may be a third-generation mobile communication technology (3rd-generation wireless telephone technology, 3G) network, a fourth-generation mobile communication technology (the 4th generation mobile communication technology, 4G) network ) network, the fifth-generation mobile communication technology (5th-generation mobile communication technology, 5G) network, the PLMN or the Internet, or even the sixth-generation or seventh-generation mobile communication technology, etc., which are not limited in the embodiments of the present application.
  • 3G third-generation mobile communication technology
  • 4G fourth-generation mobile communication technology
  • 5th-generation mobile communication technology 5th-generation mobile communication technology
  • the PLMN or the Internet or even the sixth-generation or seventh-generation mobile communication technology, etc., which are not limited in the embodiments of the present application.
  • the master node 111 may be a network control apparatus
  • the slave node 112 may be a terminal device.
  • the foregoing network control apparatus may be in various forms, which are not limited in this embodiment of the present application.
  • the network control apparatus may be an independent device.
  • the network control apparatus may be integrated in other devices as a functional module or a chip apparatus.
  • the network control apparatus described in the embodiments of the present application may also be referred to as access equipment or radio access network equipment, and may be an evolved NodeB (evolved NodeB) in a long term evolution (long term evolution, LTE) system , eNB or eNodeB), it can also be a wireless controller in a cloud radio access network (CRAN) scenario, or the access device can be a relay station, an access point, an in-vehicle device, a wearable device, and a 5G
  • the access device in the network or the network device in the public land mobile network (PLMN) that evolves in the future, etc. may be an access point (AP) in a wireless local area network (WLAN).
  • AP access point
  • WLAN wireless local area network
  • gNB in a new wireless system (new radio, NR) system
  • NR new radio
  • control device or control device in the cockpit domain can also be a control device or control device in a scene containing intelligent terminal equipment.
  • the embodiment is not limited.
  • the foregoing terminal device may be in various forms, which are not limited in this embodiment of the present application.
  • the terminal device may be an independent device.
  • the terminal device may be integrated in other devices as a functional module or a chip device.
  • the terminal device described in the embodiments of the present application may be a device that provides voice/data connectivity to a user, such as a handheld device with a wireless connection function, a vehicle-mounted device, and the like.
  • some examples of terminal devices are: mobile phone (mobile phone), tablet computer, notebook computer, PDA, mobile internet device (MID), wearable device, virtual reality (VR) device, augmented Augmented reality (AR) devices, wireless terminals in self driving, cellular phones, cordless phones, session initiation protocol (SIP) phones, personal digital assistants (PDAs), Handheld devices, computing devices, in-vehicle devices, smart home devices, wearable devices with wireless communication functions, terminal devices in 5G networks or terminal devices in the future evolved public land mobile network (PLMN), etc. , which is not limited in the embodiments of the present application.
  • PLMN public land mobile network
  • wearable devices can also be called wearable smart devices, which is a general term for the intelligent design of daily wear and the development of wearable devices using wearable technology, such as glasses, gloves, watches, clothing and shoes. Wait.
  • a wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories.
  • the terminal device may include the following two types of terminals: "vehicle terminal equipment” and “non-vehicle terminal equipment” equipment”.
  • On-board terminal equipment also known as on-board unit (OBU) refers to a piece of equipment that is integrated or installed in or on a vehicle. Optionally, it can be a device installed in the cockpit. For example: car speakers, car microphones, car monitors, car cameras, etc.
  • the in-vehicle terminal device may refer to a device that is factory-installed on the vehicle by the vehicle manufacturer.
  • Non-vehicle terminal equipment means a device placed on or in a vehicle, capable of communicating or connecting with other devices, but not part of the vehicle, such as a user's smartphone, tablet, Bluetooth headset, Wearable devices and other smart terminals.
  • the network control device may be a cockpit domain controller (CDC), and the CDC may communicate with multiple terminal devices, and the types of the multiple terminal devices may include vehicle-mounted terminal devices Or at least one terminal type in off-board terminal equipment.
  • CDC cockpit domain controller
  • the master node 111 is a CDC
  • the slave node 112 includes on-board terminal devices (such as on-board displays, on-board speakers, and on-board microphones) and off-board terminal devices (such as smart terminals)
  • the communication The system 100 may also have the architecture shown in FIG. 2 .
  • the upper-layer data packet can be segmented, and the segmented data can be added to the Additional header information, such as segment offset information, and then the segmented data is transmitted.
  • the processing process of the service data to be sent by the slave node 112, taking the LTE system MAC PDU generation process as an example, includes:
  • a MAC PDU generated by the MAC layer may contain MAC SDUs (corresponding to RLC PDUs) of one or more logical channels, where each logical channel corresponds to an RLC entity.
  • the packet header of the MAC PDU includes subheaders corresponding to the respective MAC SDUs of the multiple logical channels.
  • the subheader corresponding to the MAC SDU generally contains information related to the MAC SDU.
  • the MAC SDU subheader may include at least one item of information about a logical channel identifier corresponding to the MAC SDU, length indication information of the MAC SDU, and whether the MAC SDU is the last SDU in the MAC PDU.
  • Figures 3A and 3B are two optional encapsulation formats of MAC PDUs.
  • the sub-header of MAC SDU1 is sub-header 1
  • the sub-header of MAC SDU1 is sub-header 2
  • the sub-header of MAC SDU n is sub-header n.
  • the respective subheaders of multiple MAC SDUs are uniformly encapsulated in the frame header (MAC header) position of the MAC PDU.
  • FIG. 3B in the MAC PDU, the respective subheaders of the multiple MAC SDUs are respectively located in the front part of the MAC SDU, that is, the multiple MAC SDUs are arranged at intervals.
  • the MAC layer will first determine the size of the time-frequency resources allocated for each logical channel according to the size of the time-frequency resources scheduled by the master node for its (slave node) and the priority of the current logical channel; the RLC entity corresponding to the logical channel At least one RLC PDU needs to be generated according to the determined size of the time-frequency resource, and the at least one RLC PDU is regarded as a MAC SDU at the MAC layer. It should be noted that, in order to adapt to the size of the physical resources, the RLC entity may perform segmentation (Segmentation) on a certain RLC SDU when generating at least one RLC PDU.
  • Segmentation segmentation
  • the RLC SDU is divided into two parts, and independent headers are added respectively to generate RLC PDU1 and RLC PDU2; this time only RLC PDU1 is included in the MAC SDU; it is understandable that the RLC entity is determining the RLC
  • the length of bits occupied by the packet header corresponding to the SDU that is, the size of the packet header
  • the RLC entity will comprehensively consider the size of the finally generated RLC PDU containing the RLC SDU segment.
  • the cockpit domain controller i.e. the master node
  • the terminal device i.e. the slave node, such as a car speaker or car microphone
  • data packets with a large amount of data such as data of streaming media services
  • data of active noise reduction services there are also small packets of data, such as data of active noise reduction services.
  • the usual sampling period of the active noise reduction service is 48Khz
  • the sampling data of each sampling point is 16bit or 24bit, that is to say, the data packet of the active noise reduction service can be only 16bit or 24bit.
  • segmentation offset Segmentation offset
  • a data transmission method is provided in the embodiments of the present application, which is beneficial to improve transmission efficiency and reduce system overhead and delay.
  • FIG. 5 is a schematic flowchart of a data transmission method provided by an embodiment of the present application. As shown in Figure 5, the method includes:
  • the second node receives first configuration information from the first node.
  • the first node may be the master node 111 in the above communication system 100
  • the second node may be any slave node 112 in the above communication system 100 .
  • the first node may be a network control apparatus in various forms
  • the second node may be a terminal device in various forms.
  • the first node may be a CDC
  • the second node may be various on-board terminal devices or off-board terminal devices.
  • the first configuration information is used to configure the first time-frequency resource.
  • the first configuration information includes at least one of time domain resource information and frequency domain resource information of the first time-frequency resource, or the first configuration information includes information used to indicate the time domain resource of the first time-frequency resource and At least one of the information of frequency domain resources.
  • the second node may determine the first time-frequency resource according to the first configuration information, so as to use the first time-frequency resource to send data to the first node. It should be noted that, if the first configuration information only indicates the time domain resource or frequency domain resource, the second node may determine the unindicated time domain resource or frequency domain resource according to the pre-configuration or standard definition, so as to Determine the first time-frequency resource.
  • the first configuration information may be semi-static resource configuration information, that is, the first time-frequency resource configured by the first configuration information is a semi-static resource.
  • the first configuration information may be dynamic resource configuration information, so as to configure the above-mentioned first time-frequency resource for the second node through dynamic configuration.
  • the first configuration information may be carried in radio resource control (Radio Resource Control, RRC) signaling.
  • RRC Radio Resource Control
  • the RRC signaling includes system information (System information).
  • the first configuration information may also be carried on a physical layer control channel, such as a downlink control indication (Downlink Control Information, DCI).
  • a physical layer control channel such as a downlink control indication (Downlink Control Information, DCI).
  • DCI Downlink Control Information
  • the first configuration information may also be included in the management frame.
  • the management frame can realize management functions such as connection management and resource configuration between the master node and the slave node.
  • the second node acquires the first information corresponding to the first logical channel.
  • the first logical channel may specifically correspond to a certain RLC entity in the second node, or may correspond to a data queue of a certain service.
  • the data in the first logical channel may be the data queue corresponding to the active noise reduction service, or the data in the first logical channel may be the data in the first RLC entity RLC SDU, wherein the RLC SDU in the first RLC entity may contain active noise reduction service data.
  • the first logical channel may also correspond to an SDU in other protocol entities, such as a PDCP entity, which is not limited in this application.
  • the first information corresponding to the first logical channel is used to indicate whether the data packet in the first logical channel is allowed to be segmented.
  • the first logical channel corresponds to the second time-frequency resource, and the second time-frequency resource is included in the first time-frequency resource.
  • the second node may correspond to multiple logical channels.
  • the logical channel priority and the logical channel priority.
  • At least one of the information such as the size of the data generally, these can be stipulated by data encapsulation rules or agreements, and this application does not specifically limit the specific rules and agreement methods.
  • the second time-frequency resource corresponding to the first logical channel may be determined by the media access layer for the first logical channel according to at least one of the priority of the logical channel, the size of the data in the logical channel, and other information.
  • the time-frequency resources predetermined by the data encapsulation rule or the protocol are satisfied.
  • the size of the second time-frequency resource corresponding to the first logical channel may be at least one of the data encapsulation rules such as the priority of the logical channel, the size of the data in the logical channel, and other information by the media access layer, which is The time-frequency resource size determined by the first logical channel and meeting the data encapsulation rule or predetermined by the protocol.
  • the specific time-frequency resource locations are not considered in this example for the time being.
  • the first logical channel corresponds to the first data queue.
  • the first logical channel is used to transmit data packets in the first data queue.
  • Whether to allow the data packets in the first logical channel to be fragmented may be whether to allow the service data packets in the first logical channel to be fragmented.
  • the first logical channel corresponds to the first protocol stack entity
  • the first logical channel corresponds to the RLC entity
  • the first logical channel is used to transmit data packets from the RLC entity.
  • Whether to allow the data packet in the first logical channel to be segmented may be whether to allow the SDU in the first protocol entity corresponding to the first logical channel to be segmented;
  • the first protocol entity may be RLC entity
  • the SDU in the first protocol entity may be an RLC SDU.
  • the RLC entity corresponding to the first logical channel is used as an example for description.
  • the RLC entity can be replaced by other types of protocol stack entities, such as possible entity types in various short-range wireless communication systems.
  • the data packets in the first logical channel need to be transmitted, whether the data packets in the first logical channel can be transmitted through the second time-frequency resource corresponding to the first logical channel, on the one hand, will be affected by the first logical channel.
  • the influence of the content indicated by the information for example, if the first information is used to indicate that the segmentation of the data packet in the first logical channel is not allowed, then if the data packet in the first logical channel is sent through the second time-frequency resource, the If the data packet in a logical channel is segmented, based on the indication of the first information, the data packet in the first logical channel cannot actually be sent through the second time-frequency resource.
  • whether the data packet in the first logical channel can be sent through the second time-frequency resource corresponding to the first logical channel is also affected by the size of the second time-frequency resource.
  • whether to send the data packet in the first logical channel through the second time-frequency resource may be specifically determined according to at least one of the first information and the second time-frequency resource.
  • the data packets in the above-mentioned first logical channel may include service data packets.
  • the first information is specifically used to indicate whether to allow the segmentation of the service data packet in the first logical channel.
  • the service data packet in the first logical channel is a service data packet that is not suitable for segmentation
  • the first information can be used to indicate that the service data packet in the first logical channel is not allowed to be segmented, thereby avoiding segmenting the service data packet in the first logical channel.
  • the service data packets in the first logical channel are segmented.
  • the service data packet may be understood as a data packet carrying a certain service. For example, data packets carrying active noise reduction services, data packets carrying video services, etc.
  • the service data packet may be a data packet transmitted by the network layer to the lower layer.
  • IP or Non-IP data packets carrying video service data For example, the service data packet may be a data packet transmitted by the application layer to the lower layer.
  • the lower layer here is a relative concept.
  • the control signaling may be dedicated RRC signaling sent from the slave node to the master node.
  • the data packets in the above-mentioned first logical channel may include control signaling.
  • control signaling may also be called a management frame.
  • the above S202 may include:
  • the second node receives the second configuration information from the first node.
  • the second configuration information is used to configure the first information corresponding to the first logical channel.
  • the second configuration information may also have various bearing forms.
  • the second configuration information may be carried in the RRC signaling, or the second configuration information may be carried on the DCI, or the second configuration information may also be carried on the physical layer control channel.
  • the specific bearing form of the second configuration information reference may be made to the bearing form of the first configuration information, and details are not described herein again.
  • the master node can control the slave node. Whether the node allows the effect of fragmentation of packets in the first logical channel.
  • the second configuration information may be configuration information of the first protocol entity corresponding to the first logical channel
  • the second configuration information includes first mode information, where the first mode information is used to instruct the second node to work in the first mode and not allow data packets in the first logical channel to be segmented.
  • the second node may have multiple working modes, and the multiple working modes include the first mode. Fragmentation of data packets in the first logical channel is not allowed when the second node operates in the first mode.
  • the first mode may be a low-latency transmission mode. When working in the low-latency transmission mode, the second node does not allow or accept any The data packets in the first logical channel are segmented.
  • the mode information of the low-latency transmission mode when used to instruct the second node to work in the corresponding mode, it also indicates that the data packets in the first logical channel are not allowed to be segmented.
  • This application does not specifically limit the types of working modes, and only mode information related to different modes can be used to indicate whether segmentation is allowed.
  • the data in the logical channel may be SDU or service data corresponding to the first protocol entity, which will not be repeated here.
  • the above-mentioned S202 may include:
  • the second node determines the first information corresponding to the first logical channel according to the quality of service (quality of service, QoS) information or service type corresponding to the data in the first logical channel.
  • the quality of service information or service type corresponding to the data in the first logical channel may specifically be the service quality information or service type of the service data encapsulated in the data packets in the first logical channel, or may be the first logical channel
  • the quality of service information or service type of the data packet (SDU or PDU) in the data packet which may not be limited in this application.
  • the QoS information or service type is only an example, and this application does not limit the determination of the first information only according to the QoS information or service type, and the second node may determine the first information according to the first logical channel or the first logical channel.
  • the first information is determined by any one or more information of the data in the channel.
  • the above-mentioned service quality information or service type may also be regarded as the first information. That is, acquiring the first information corresponding to the first logical channel can be understood as acquiring the service quality information or service type corresponding to the first logical channel, and the service quality information or service type corresponding to the first logical channel is used to indicate whether to allow the packet fragmentation in the first logical channel.
  • the QoS information corresponding to the data in the first logical channel reflects that the data packets in the first logical channel are not suitable for segmentation, it is determined that the first information indicates that segmentation of the data packets in the first logical channel is not allowed; if The QoS information corresponding to the first logical channel reflects that the data packets in the first logical channel can be segmented, and it is determined that the first information indicates that the data packets in the first logical channel are allowed to be segmented. In this way, the sending manner of the data packets in the first logical channel matches the quality of service (QoS) information corresponding to the first logical channel. Similarly, determining the first information corresponding to the first logical channel according to the service type corresponding to the first logical channel can also achieve a similar effect.
  • QoS quality of service
  • the QoS information of the data for which data packet segmentation is not allowed may be agreed in the protocol; wherein the QoS information is used to indicate the QoS requirement or requirement of the data in the logical channel.
  • QoS requirements or requirements may include, but are not limited to, data priority, data reliability, data transmission rate, data transmission latency, data communication One or more of the distances (range).
  • the QoS information may be a QoS classification index QCI, or a QoS flow ID (QoS flow ID), which is not limited in this embodiment of the present application.
  • the correspondence between the QCI or QoS flow ID and the corresponding QoS requirements or requirements may be agreed upon in the protocol.
  • the service type information of the data for which data packet segmentation is not allowed may be stipulated in the protocol.
  • the service type information is used to indicate the service type of the data in the logical channel.
  • service types can be distinguished by application IDs (application IDs, AIDs).
  • application IDs application IDs, AIDs.
  • the AID of the active noise reduction service is 1, and the AID of the video service is 2.
  • active noise reduction services do not allow segmentation.
  • dedicated RRC signaling does not allow segmentation.
  • the second node sends the first data to the first node through the first time-frequency resource.
  • the second node may send the data, that is, the first data, to the first node through the first time-frequency resource.
  • the MAC PDU includes at least one MAC SDU.
  • a single MAC SDU can contain one or more data in a logical channel. Therefore, the second time-frequency resource corresponding to the first logical channel may include a time-frequency resource for at least one data in the first logical channel.
  • the data packets (RLC SDUs) in the first logical channel will be encapsulated into RLC PDUs (also called MAC SDUs) (for example, MAC SDU1) . Further, the MAC SDU1 will be carried in the second time-frequency resource during the transmission process.
  • whether the second time-frequency resource is sufficient to carry the data packets in the first logical channel cannot only consider the size of the RLC SDU, but the size of the RLC PDU generated after processing the RLC SDU. In yet another implementation, whether the second time-frequency resource is sufficient to carry the data packet in the first logical channel may only consider the size of the RLC SDU, without considering the size of the RLC PDU generated after processing the RLC SDU.
  • the specific implementation manner may depend on specific communication scenarios or protocol conventions. The following paragraphs can refer to this paragraph for the description of whether the time-frequency resources are sufficient to carry data packets.
  • the number of MAC SDUs corresponding to the first logical channel may be one or multiple, which is not limited in the present invention.
  • the sub-packet header of the MAC SDU corresponding to the first logical channel carries a logical channel identifier (logical channel identifier, LCID) or a QoS class identifier (QoS class Identifier, QCI), which is used for the MAC corresponding to the first logical channel.
  • SDUs are distinguished from MAC SDUs corresponding to other logical channels.
  • the sub-packet header of the MAC SDU in the first data may be located in the packet header of the first data.
  • FIG. 3A shows a frame structure of the first data.
  • the first data may include a MAC header (MAC header), a MAC control element (MAC control element), a MAC SDU and a padding.
  • the sub-header (sub-header) of the MAC SDU is located at the position of the MAC header.
  • the sub-packet header of the MAC SDU in the first data may be spaced from the MAC SDU.
  • FIG. 3B shows another frame structure of the first data.
  • the sub-packet header of each MAC SDU is located before the corresponding MAC SDU.
  • the frame structure shown in FIG. 3B may also include MAC control elements and/or padding fields.
  • the frame structure shown in FIG. 3B may also include a subheader corresponding to the MAC CE.
  • the frame structure shown in FIG. 3B may also include a subheader corresponding to the padding field.
  • the present application may not limit the position of the sub-packet header of each MAC SDU in the first data.
  • the second time-frequency resource corresponding to the first logical channel may also be an available resource of the MAC PDU.
  • the second node may also send data to the first node without using the first time-frequency resource.
  • the second node may not send data to the first node through the first time-frequency resource.
  • the second node may not send data to the first node through the first time-frequency resource.
  • the first time-frequency resource when used to carry data in multiple logical channels, if each logical channel in the multiple logical channels (including the first logical channel) carried in the first time-frequency resource according to the above scheme, it is determined that the data packets in the logical channels are not allowed to be segmented, and the data packets in these logical channels cannot be carried on the first time-frequency resource without segmenting the data packets in the logical channels. In the middle, the second node may not send data to the first node through the first time-frequency resource.
  • the size of the packet header information of the data packet is taken into consideration. For example, when the first logical channel corresponds to the first RLC entity, when determining whether the first time-frequency resource can carry the data packets in the first logical channel, the size of the RLC PDU is considered.
  • the size of the packet header information of the data packet is not taken into account, such as transparent transmission mode or other possible scenarios.
  • the size of the RLC SDU is considered.
  • the second node may not send data to the first node through the first time-frequency resource, the above content of S203 may not be performed in the technical solution provided by the present application.
  • the first information indicates that the data packet in the first logical channel is not allowed to be segmented
  • the data packets in the first logical channel are not sent through the second time-frequency resource.
  • data does not contain data packets in the first logical channel) to avoid fragmentation of the data packets in the first logical channel.
  • the above-mentioned methods provided in the embodiments of the present application may specifically include:
  • the second node receives first configuration information from the first node.
  • the first configuration information is used to configure the first time-frequency resource.
  • the second node acquires the first information corresponding to the first logical channel.
  • the first information is used to indicate whether the data packet in the first logical channel is allowed to be segmented. Specifically, the first information is used to indicate that the data packet in the first logical channel is not allowed to be segmented.
  • the first logical channel corresponds to the second time-frequency resource
  • the second time-frequency resource is included in the first time-frequency resource
  • the size of the second time-frequency resource is insufficient to carry all the data packets in the first logical channel.
  • the second node sends the first data to the first node through the first time-frequency resource.
  • the first data does not include data packets in the first logical channel.
  • S301-S303 and S201-S203 have the same content in the implementation manner, reference may be made to the corresponding description of the above-mentioned S201-S203, and details are not repeated here.
  • the size of each data packet in the first logical channel cannot be obtained, but only the total size of all data packets in the first logical channel can be obtained. Therefore, in order to avoid fragmentation when some data packets are sent, in the above design, when the first information indicates that the data packets in the first logical channel are not allowed to be fragmented, and it is determined that the size of the second time-frequency resource is not enough to carry When there are all data packets in the first logical channel, by making the first data not include the data packets in the first logical channel, it is possible to avoid segmenting the data packets in the first logical channel.
  • whether the size of the second time-frequency resource is sufficient to carry the first logical channel can be determined in some ways. For any data packet in a logical channel, if it is determined that the size of the second time-frequency resource is insufficient to carry any data packet in the first logical channel, the second time-frequency resource is not used to send the data packet in the first logical channel. a way to avoid fragmentation of the data packets in the first logical channel.
  • the second time-frequency resource is sufficient to carry the first data packet in the first logical channel (that is, the first data packets to be sent), if it is determined that the size of the second time-frequency resource is insufficient to carry the first data packet in the first logical channel, the second time-frequency resource is not used to send this part of the data packet in the first logical channel way to avoid fragmentation of the data packets in the first logical channel.
  • the PDU size of the protocol stack entity corresponding to the first logical channel may be considered , or, the SDU size of the protocol stack entity corresponding to the first logical channel may also be considered. It depends on the communication scenario or the protocol agreement.
  • the second node receives first configuration information from the first node.
  • the first configuration information is used to configure the first time-frequency resource.
  • the second node acquires the first information corresponding to the first logical channel.
  • the first information is used to indicate whether the data packet in the first logical channel is allowed to be segmented. Specifically, the first information is used to indicate that the data packet in the first logical channel is not allowed to be segmented.
  • the first logical channel corresponds to the second time-frequency resource
  • the second time-frequency resource is included in the first time-frequency resource
  • the size of the second time-frequency resource is insufficient to carry any data packet or the first data packet in the first logical channel .
  • the second node sends the first data to the first node through the first time-frequency resource.
  • the first data does not include data packets in the first logical channel.
  • S401-S403 and S201-S203 have the same content in the implementation manner, reference may be made to the corresponding descriptions of the above-mentioned S201-S203, and details are not repeated here.
  • the segmentation of the data packets in the first logical channel can be avoided.
  • the first information will be affected.
  • the influence of the indicated content is also influenced by the size of the second time-frequency resource on the other hand. That is, when the second node sends the first data to the first node, which data packets in the first logical channel are carried in the second time-frequency resource, which may be specifically determined according to the first information and the second time-frequency resource at least one of them is determined.
  • At least one of the first logical channels may be sent to the first node through the second time-frequency resource data pack.
  • the above-mentioned methods provided by the embodiments of the present application may specifically include:
  • the second node receives first configuration information from the first node.
  • the first configuration information is used to configure the first time-frequency resource.
  • the second node acquires the first information corresponding to the first logical channel.
  • the first information is used to indicate whether the data packet in the first logical channel is allowed to be segmented.
  • the first logical channel corresponds to the second time-frequency resource, and the second time-frequency resource is included in the first time-frequency resource.
  • the second node sends the first data to the first node through the first time-frequency resource.
  • the first data includes at least one data packet in the first logical channel.
  • At least one data packet in the first logical channel is sent to the first node through the second time-frequency resource.
  • S501-S503 and S201-S203 have the same content in the implementation manner, reference may be made to the corresponding description of the above-mentioned S201-S203, and details are not repeated here.
  • the first data may include all data packets in the first logical channel, so as to send the data packets in the first logical channel.
  • the above-mentioned methods provided by the embodiments of the present application may specifically include:
  • the second node receives first configuration information from the first node.
  • the first configuration information is used to configure the first time-frequency resource.
  • the second node acquires the first information corresponding to the first logical channel.
  • the first information is used to indicate whether the data packet in the first logical channel is allowed to be segmented.
  • the first logical channel corresponds to the second time-frequency resource
  • the second time-frequency resource is included in the first time-frequency resource
  • the size of the second time-frequency resource is sufficient to carry all data packets in the first logical channel.
  • the second node sends the first data to the first node through the first time-frequency resource.
  • the first data includes all data packets in the first logical channel.
  • S601-S603 and S201-S203 have the same content in the implementation manner, reference may be made to the corresponding description of the above-mentioned S201-S203, and details are not repeated here.
  • the size of the second time-frequency resource is sufficient to carry all the data packets in the first logical channel
  • all data packets in the first logical channel are carried in the second time-frequency resource.
  • the processing process of the first node can be simplified, that is, the first information can be read without reading the first information. All data packets in the first logical channel are sent.
  • the above-mentioned methods provided by the embodiments of the present application may specifically include:
  • the second node receives first configuration information from the first node.
  • the first configuration information is used to configure the first time-frequency resource.
  • the second node acquires the first information corresponding to the first logical channel.
  • the first information is used to indicate whether the data packet in the first logical channel is allowed to be segmented. In one implementation, the first information is used to indicate that segmentation of the data packets in the first logical channel is not allowed.
  • the first logical channel corresponds to the second time-frequency resource
  • the second time-frequency resource is included in the first time-frequency resource
  • the size of the second time-frequency resource is not enough to carry all the data packets in the first logical channel
  • the size of the second time-frequency resource is insufficient. The size is sufficient to carry at least one data packet in the first logical channel.
  • the at least one data packet in the first logical channel may specifically be at least one data packet in the first logical channel in the sending sequence.
  • the second node sends the first data to the first node through the first time-frequency resource.
  • the first data includes at least one data packet in the first logical channel.
  • S701-S703 and S201-S203 have the same content in the implementation manner, reference may be made to the corresponding description of the above-mentioned S201-S203, and details are not repeated here.
  • the data can be transmitted by making the first data include at least one data packet in the first logical channel .
  • the first time-frequency resource may correspond to multiple logical channels. Therefore, the first data sent through the first time-frequency resource may further include at least one data packet in other logical channels other than the first logical channel. Furthermore, in the above method of the present application, the first data includes at least one data packet in the second logical channel.
  • At least one data packet in the second logical channel can be encapsulated in one or more MAC SDUs in the MAC PDU.
  • the method provided by the embodiment of the present application may include: the priority of the second logical channel is lower than the priority of the first logical channel.
  • the first information corresponding to the first logical channel by setting the first information corresponding to the first logical channel, it is possible to control whether to allow the data packet in the first logical channel to be segmented when sending the data packet in the first logical channel . Further, when the first logical channel is used to transmit small packets, the first information can indicate that the data packets in the first logical channel are not allowed to be segmented, so as to avoid segmenting the small packets, thereby improving the time-frequency resources. The proportion of payload, reducing system overhead and processing delay.
  • an embodiment of the present application further provides a communication method, which can be used in the above-mentioned communication system 100 to establish a connection between nodes.
  • the method can be used in the above-mentioned embodiment in the first A connection is established between a node and a second node.
  • the communication method is described below by taking establishing a connection between the first node and the second node as an example. As shown in FIG. 6 , the method includes:
  • the second node receives the first system broadcast message from the first node.
  • the first system broadcast message includes the identity information of the first node.
  • the first identity information may be understood as information that can uniquely identify the identity of the first node in the communication domain where the first node is located.
  • the identity information of the first node may be at least one of a device identification of the first node, a media access control (media access control, MAC) address, a soft address, and a short address.
  • a media access control media access control, MAC
  • the device identifier refers to a series of numbers or a serial number that can uniquely identify the first node. For example: International Mobile Equipment Identification Number (IMEI) or Mobile Equipment Identifier (MEID).
  • IMEI International Mobile Equipment Identification Number
  • MEID Mobile Equipment Identifier
  • the MAC address refers to an address used at the media access layer, and is also called a physical address or a hardware address.
  • the soft address may be the address or identification (ID) that can uniquely identify the first node in the communication domain.
  • the short address may be an address or an identifier obtained according to a part of at least one of the foregoing device identifier, MAC address, and soft address.
  • the second node After determining that the identity information of the first node is consistent with the preset identity information, the second node sends an access request to the first node.
  • the second node before the second node sends an access request to the first node, the second node verifies the identity information of the first node, and then sends the access request to the first node after the verification is successful. ask.
  • the second node is prevented from sending an access request to a wrong node.
  • the second node is an on-board or off-board device in the cockpit domain, and the first node is a CDC, it can be avoided that the second node establishes a connection with a CDC on other vehicles in the outside world.
  • an embodiment of the present application further provides a communication method, which can be used in the above-mentioned communication system 100 to establish a connection between nodes.
  • the method can be used in the above-mentioned embodiment in the first A connection is established between a node and a second node.
  • the communication method is described below by taking establishing a connection between the first node and the second node as an example. As shown in FIG. 7 , the method includes:
  • the second node receives access resource configuration information from the first node.
  • the access resource configuration information is used to configure access resources for establishing a connection (also referred to as access) with the first node.
  • the access resources may include at least one time-frequency resource.
  • the access resource configuration information further includes information about the access mode corresponding to the access resource, for example, the access mode is indicated by 1 bit, or the access resource configuration information is also used to indicate the access mode.
  • the access mode corresponding to the access resource is described.
  • the access manner may be at least one of contention access or non-contention access.
  • the access resource configuration information is used to indicate competing access, and at least one time-frequency resource included in the access resource is used for multiple second nodes to compete for access.
  • the second node may use the contention access method , sending an access request to the first node through at least one time-frequency resource.
  • the access resource configuration information is used to indicate non-contention access, and the second node sends an access request through the access resource.
  • the second node may send the access request through part of the access resources.
  • the second node when the access resource configuration information is used to indicate non-contention access, after the second node receives the access resource configuration information, after receiving the access resource configuration information, the second node can access the non-contention access
  • the access method uses the time-frequency resource included in the access resource to send the access request to the first node.
  • the access resource configuration information is used to indicate non-contention access and contention access
  • the access resource includes at least two time-frequency resources
  • the at least two time-frequency resources include non-contention access and contention access.
  • multiple second nodes may send access requests to the first node on the same time-frequency resource.
  • multiple second nodes send access requests to the first node on mutually orthogonal (non-overlapping) time-frequency resources.
  • the access resource configuration information may be system information (System information) or RRC signaling.
  • the second node sends an access request to the first node on the configured access resource.
  • the second node randomly selects a first resource from the access resources, and sends an access request to the first node on the first resource;
  • the second node may randomly select a time unit, and send the access request through the access resource corresponding to the time unit.
  • the above-mentioned time unit may specifically be a time unit such as a symbol, a time slot, a radio frame, and a superframe.
  • the symbols may be orthogonal frequency division multiplexed OFDM symbols.
  • the duration of one superframe may be 1 ms, and one superframe may include multiple radio frames, for example, the number of radio frames may also be 48.
  • one radio frame may contain multiple symbols, and the length of the radio frame may be 1/48 kHz, which is about 20.83 us.
  • the number of symbols included in each radio frame may be predefined.
  • the transmission direction of each symbol in each radio frame may be configured or notified by the first node.
  • the radio frame may sequentially include the first time domain resource, the first guard interval GP, the second time domain resource, and the second GP in the time domain.
  • the first time domain resource is used for mapping information or signals (downlink direction) from the first node
  • the second time domain resource is used for mapping information sent to the first node or Signal (upstream direction)
  • the first GP and the second GP are used to perform conversion of transmission in different directions, such as transceiving conversion or transceiving conversion.
  • sending an access request to the first node on the first resource may include sending an access request to the first node on the first resource and sending the second identity information of the second node to the first node .
  • the second node determines a second resource from the access resources according to the second identity information of the second node, and sends the first node on the second resource to the first node.
  • the sending the access request to the first node on the second resource may include sending the third identity information of the second node to the first node on the second resource.
  • the third identity information may be understood as information that can uniquely identify the identity of the second node in the communication domain where the second node is located.
  • the second identity information and the third identity information may be the same or different.
  • the optional second identity information or third identity information may be at least one of a device identification, a media access control (media access control, MAC) address, a soft address, and a short address.
  • a media access control media access control, MAC
  • the device identification refers to a series of numbers or a serial number that can uniquely identify the device. For example: International Mobile Equipment Identification Number (IMEI) or Mobile Equipment Identifier (MEID).
  • IMEI International Mobile Equipment Identification Number
  • MEID Mobile Equipment Identifier
  • the MAC address refers to an address used at the media access layer, and is also called a physical address or a hardware address.
  • the soft address may be an address or an identifier that can uniquely identify the node in the communication domain.
  • the soft address can be pre-configured when the device is shipped from the factory.
  • the short address may be an address or an identifier obtained according to a part of at least one of the foregoing device identifier, MAC address, and soft address.
  • the above-mentioned terminal device or network device includes corresponding hardware structures and/or software modules for executing each function.
  • the unit of each example described in conjunction with the embodiments disclosed herein can be implemented in hardware or in the form of a combination of hardware and computer software. Whether a function is performed by hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of this application.
  • the device may be divided into functional modules according to the foregoing method examples.
  • each functional module may be divided corresponding to each function, or two or more functions may be integrated into one in the processing module.
  • the above-mentioned integrated modules can be implemented in the form of hardware, and can also be implemented in the form of software function modules.
  • the division of modules in the embodiment of the present application is schematic, and is only a logical function division, and another division manner may be used in actual implementation.
  • FIG. 8 it is a schematic diagram of the composition of a data transmission apparatus 200 according to an embodiment of the present application.
  • the data transmission device 200 may be a chip or a system on a chip.
  • the data transmission apparatus 200 may be used to perform the functions of the second node involved in the above embodiments.
  • the data transmission apparatus 200 includes:
  • a receiving unit 2001 configured to receive first configuration information from a first node, where the first configuration information is used to configure a first time-frequency resource;
  • An obtaining unit 2002 configured to obtain first information corresponding to a first logical channel, where the first information is used to indicate whether to allow the segmentation of data packets in the first logical channel; wherein, the first logical channel corresponds to second time-frequency resources, the second time-frequency resources are included in the first time-frequency resources;
  • the sending unit 2003 is configured to send the first data to the first node through the first time-frequency resource.
  • the first data does not include the data packets in the first logical channel; wherein the first information is used to indicate that segmentation of the data packets in the first logical channel is not allowed, and all The size of the second time-frequency resource is insufficient to carry all the data packets in the first logical channel; or, wherein the first information is used to indicate that the data packets in the first logical channel are not allowed to be segmented , and the size of the second time-frequency resource is insufficient to carry any data packet or the first data packet in the first logical channel.
  • the first data includes at least one data packet in the first logical channel
  • the sending unit 2003 is specifically configured to send the at least one data packet through the second time-frequency resource according to at least one of the first information or the size of the second time-frequency resource.
  • the first data includes all the data packets in the first logical channel; wherein the size of the second time-frequency resource is sufficient to carry all the data packets in the first logical channel.
  • the first data includes at least one data packet in the first logical channel
  • the first information is used to indicate that data packets in the first logical channel are not allowed to be fragmented, the size of the second time-frequency resource is insufficient to carry all the data packets in the first logical channel, and the second The size of the time-frequency resource is sufficient to carry the at least one data packet.
  • the first logical channel corresponds to a first data queue
  • the data packets in the first logical channel include service data packets
  • the data packets in the first logical channel include control signaling.
  • the first logical channel corresponds to the first protocol stack entity, and the data packets in the first logical channel are service data units in the first protocol stack entity.
  • the obtaining unit 2002 is configured to receive second configuration information from the first node, where the second configuration information is used to configure the first information corresponding to the first logical channel.
  • the obtaining unit 2002 is configured to determine the first information corresponding to the first logical channel according to the quality of service QoS information or service type corresponding to the data in the first logical channel.
  • the first data includes at least one data packet in the second logical channel.
  • the data transmission apparatus 200 provided in the embodiment of the present application is configured to perform the function of the second node in the above data transmission method, thereby achieving the same effect as the above data transmission method.
  • FIG. 9 it is a schematic diagram of the composition of a data transmission apparatus 300 according to an embodiment of the present application.
  • the data transmission device 300 may be a chip or a system on a chip.
  • the data transmission apparatus 300 may be used to perform the functions of the first node involved in the above embodiments.
  • the data transmission apparatus 300 includes:
  • a sending unit 3001 configured to send first configuration information to a second node; the configuration information is used to configure first time-frequency resources;
  • the sending unit 3001 is further used for second configuration information; the second configuration information is used to indicate whether to allow data packet segmentation in the first logical channel; the first logical channel corresponds to the second time-frequency resource, the second time-frequency resource is included in the first time-frequency resource;
  • a receiving unit 3002 configured to receive the first data from the second node through the first time-frequency resource.
  • the first logical channel corresponds to the first data queue, and the data packets in the first logical channel include service data packets, or the data packets in the first logical channel include control signaling.
  • the first logical channel corresponds to the first protocol stack entity
  • the data packet in the first logical channel is the service data unit SDU in the first protocol stack entity. Based on the above design, whether to allow the service data unit in the first protocol stack entity to be segmented may be indicated through the first information.
  • the data transmission apparatus 200 provided by the embodiment of the present application is configured to perform the function of the first node in the above-mentioned data transmission method, thereby achieving the same effect as the above-mentioned data transmission method.
  • FIG. 10 it is a schematic diagram of the composition of a data transmission apparatus 400 according to an embodiment of the present application.
  • the data transmission device 400 may be a chip or a system on a chip.
  • the data transmission apparatus 400 may be used to perform the functions of the second node involved in the above embodiments.
  • the data transmission device 400 includes:
  • the receiving unit 4001 is configured to receive a first system broadcast message from a first node.
  • the first system broadcast message includes the identity information of the first node.
  • the sending unit 4002 sends an access request to the first node after determining that the identity information of the first node is consistent with the preset identity information.
  • the identity information of the first node may be at least one of a device identification of the first node, a media access control (media access control, MAC) address, a soft address, and a short address.
  • a media access control media access control, MAC
  • FIG. 11 it is a schematic diagram of the composition of a data transmission apparatus 500 according to an embodiment of the present application.
  • the data transmission device 500 may be a chip or a system on a chip.
  • the data transmission apparatus 500 may be used to perform the functions of the first node involved in the above embodiments.
  • the data transmission apparatus 500 includes:
  • the sending unit 5001 sends a first system broadcast message to the second node.
  • the first system broadcast message includes the identity information of the first node.
  • the receiving unit 5002 receives an access request from the second node.
  • the identity information of the first node may be at least one of a device identification of the first node, a media access control (media access control, MAC) address, a soft address, and a short address.
  • a media access control media access control, MAC
  • FIG. 12 it is a schematic diagram of the composition of a data transmission apparatus 600 according to an embodiment of the present application.
  • the data transmission device 600 may be a chip or a system on a chip.
  • the data transmission apparatus 600 may be used to perform the functions of the second node involved in the above embodiments.
  • the data transmission device 600 includes:
  • the receiving unit 6001 is configured to receive access resource configuration information from the first node.
  • the access resource configuration information is used to configure access resources for establishing a connection (also referred to as access) with the first node.
  • the sending unit 6002 is used for the second node to send an access request to the first node on the configured access resource.
  • the access resource configuration information further includes information about the access mode corresponding to the access resource, or the access resource configuration information is also used to indicate the access resource corresponding to the access resource. access method.
  • the access resource configuration information may be system information (System information) or RRC signaling.
  • the sending unit 6002 is specifically configured to randomly select a first resource from the access resources, and send an access request to the first node on the first resource.
  • the sending unit 6002 is specifically configured to send an access request to the first node on the first resource and send the second identity information of the second node to the first node.
  • the sending unit 6002 is specifically configured to determine a second resource from the access resources according to the second identity information of the second node, and send a message to the first node on the second resource. Send an access request.
  • the sending unit 6002 is specifically configured to send the third identity information of the second node to the first node on the second resource.
  • the second identity information and the third identity information may be the same or different, and the second identity information or the third identity information may be device identification, media access control (media access control, MAC) At least one of address, soft address, and short address.
  • media access control media access control, MAC
  • FIG. 13 it is a schematic diagram of the composition of a data transmission apparatus 700 according to an embodiment of the present application.
  • the data transmission device 700 may be a chip or a system on a chip.
  • the data transmission apparatus 700 may be used to perform the functions of the first node involved in the above embodiments.
  • the data transmission apparatus 700 includes:
  • the sending unit 7001 is configured to send the access resource configuration information to the second node.
  • the access resource configuration information is used to configure access resources for establishing a connection (also referred to as access) with the first node.
  • the receiving unit 7002 is used for the first node to receive the access request from the second node through the access resource.
  • the access resource configuration information further includes information about the access mode corresponding to the access resource, or the access resource configuration information is also used to indicate the access resource corresponding to the access resource. access method.
  • the access resource configuration information may be system information (System information) or RRC signaling.
  • FIG. 14 a schematic diagram of the composition of a data transmission apparatus 800 provided in an embodiment of the present application is provided, and the data transmission apparatus can be used to implement the function of the first node or the second node in the above data transmission method or communication method.
  • the data transmission device 800 may include a processor 810, an external memory interface 820, an internal memory 821, a universal serial bus (USB) interface 830, a charging management module 840, a power management module 841, a battery 842, an antenna 1, Antenna 2, mobile communication module 850, wireless communication module 860, audio module 870, speaker 870A, receiver 870B, microphone 870C, headphone jack 870D, sensor module 880, button 890, motor 891, indicator 892, camera 893, display screen 894 , and at least one of a subscriber identification module (subscriber identification module, SIM) card interface 895 and the like.
  • SIM subscriber identification module
  • the structures illustrated in the embodiments of the present application do not constitute a specific limitation on the data transmission apparatus 800 .
  • the data transmission apparatus 800 may include more or less components than shown, or some components may be combined, or some components may be separated, or different components may be arranged.
  • the illustrated components may be implemented in hardware, software, or a combination of software and hardware.
  • the processor 810 may include one or more processing units, for example, the processor 810 may include an application processor (application processor, AP), a modem processor, a graphics processor (graphics processing unit, GPU), an image signal processor (image signal processor, ISP), controller, video codec, digital signal processor (digital signal processor, DSP), application specific integrated circuit (application specific integrated circuit, ASIC), field programmable gate array (field-programmable gate) array, FPGA), baseband processor, and/or neural-network processing unit (NPU), etc. Wherein, different processing units may be independent components, or may be integrated in one or more processors. In some embodiments, the data transmission apparatus 800 may also include one or more processors 810 .
  • the controller can generate an operation control signal according to the instruction operation code and the timing signal, and complete the control of fetching and executing instructions.
  • a memory may also be provided in the processor 810 for storing instructions and data.
  • the memory in the processor 810 may be a cache memory. This memory may hold instructions or data that have just been used or recycled by the processor 810 . If the processor 810 needs to use the instruction or data again, it can be called directly from the memory. In this way, repeated access is avoided, and the waiting time of the processor 810 is reduced, thereby improving the efficiency of the data transmission apparatus 800 in processing data or executing instructions.
  • processor 810 may include one or more interfaces.
  • the interface may include an inter-integrated circuit (I2C) interface, an inter-integrated circuit sound (I2S) interface, a pulse code modulation (pulse code modulation, PCM) interface, a universal asynchronous transceiver (universal) asynchronous receiver/transmitter, UART) interface, mobile industry processor interface (MIPI), general-purpose input/output (GPIO) interface, SIM card interface, and/or USB interface, etc.
  • the USB interface 830 is an interface that conforms to the USB standard specification, and may specifically be a Mini USB interface, a Micro USB interface, a USB Type C interface, and the like.
  • the USB interface 830 can be used to connect a charger to charge the data transmission apparatus 800, and can also be used to transmit data between the data transmission apparatus 800 and peripheral devices.
  • the USB interface 830 can also be used to connect an earphone, and play audio through the earphone.
  • the interface connection relationship between the modules illustrated in the embodiments of the present application is only a schematic illustration, and does not constitute a structural limitation of the data transmission apparatus 800 .
  • the data transmission apparatus 800 may also adopt different interface connection manners in the foregoing embodiments, or a combination of multiple interface connection manners.
  • the charging management module 840 is used to receive charging input from the charger.
  • the charger may be a wireless charger or a wired charger.
  • the charging management module 840 may receive charging input from the wired charger through the USB interface 830 .
  • the charging management module 840 may receive wireless charging input through the wireless charging coil of the data transmission device 800 . While the charging management module 840 is charging the battery 842 , it can also supply power to the terminal through the power management module 841 .
  • the power management module 841 is used to connect the battery 842 , the charging management module 840 and the processor 810 .
  • the power management module 841 receives input from the battery 842 and/or the charge management module 840, and supplies power to the processor 810, the internal memory 821, the external memory, the display screen 894, the camera 893, and the wireless communication module 860.
  • the power management module 841 can also be used to monitor parameters such as battery capacity, battery cycle times, battery health status (leakage, impedance).
  • the power management module 841 may also be provided in the processor 810 .
  • the power management module 841 and the charging management module 840 may also be provided in the same device.
  • the wireless communication function of the data transmission apparatus 800 can be implemented by the antenna 1, the antenna 2, the mobile communication module 850, the wireless communication module 860, the modulation and demodulation processor, the baseband processor, and the like.
  • Antenna 1 and Antenna 2 are used to transmit and receive electromagnetic wave signals.
  • Each antenna in data transmission device 800 may be used to cover a single or multiple communication frequency bands. Different antennas can also be reused to improve antenna utilization.
  • the antenna 1 can be multiplexed as a diversity antenna of the wireless local area network. In other embodiments, the antenna may be used in conjunction with a tuning switch.
  • the mobile communication module 850 may provide a wireless communication solution including 2G/3G/4G/5G, etc. applied on the data transmission device 800 .
  • the mobile communication module 850 may include at least one filter, switch, power amplifier, low noise amplifier (LNA), and the like.
  • the mobile communication module 850 can receive electromagnetic waves from the antenna 1, filter and amplify the received electromagnetic waves, and transmit them to the modulation and demodulation processor for demodulation.
  • the mobile communication module 850 can also amplify the signal modulated by the modulation and demodulation processor, and then convert it into electromagnetic waves and radiate it out through the antenna 1 .
  • at least part of the functional modules of the mobile communication module 850 may be provided in the processor 810 .
  • at least part of the functional modules of the mobile communication module 850 may be provided in the same device as at least part of the modules of the processor 810 .
  • the wireless communication module 860 may provide wireless local area networks (WLAN) (such as wireless fidelity (Wi-Fi) networks), bluetooth (BT), global navigation satellites, and wireless local area networks (WLANs) applied on the data transmission device 800 .
  • WLAN wireless local area networks
  • System global navigation satellite system, GNSS
  • frequency modulation frequency modulation, FM
  • near field communication technology near field communication, NFC
  • infrared technology infrared, IR
  • the wireless communication module 860 may be one or more devices integrating at least one communication processing module, wherein one communication processing module may correspond to a network interface, and the network interface may be set in different service function modes, set in the Network interfaces in different modes can establish network connections corresponding to that mode.
  • a network connection supporting the P2P function can be established through the network interface in the P2P function mode
  • a network connection supporting the STA function can be established through the network interface in the STA function mode
  • a network supporting the AP function can be established through the network interface in the AP mode. connect.
  • the wireless communication module 860 receives electromagnetic waves via the antenna 2 , frequency modulates and filters the electromagnetic wave signals, and sends the processed signals to the processor 810 .
  • the wireless communication module 860 can also receive the signal to be sent from the processor 810 , perform frequency modulation on the signal, amplify the signal, and then convert it into an electromagnetic wave for radiation through the antenna 2 .
  • the data transmission device 800 realizes the display function through the GPU, the display screen 894, and the application processor.
  • the GPU is a microprocessor for image processing, and is connected to the display screen 894 and the application processor.
  • the GPU is used to perform mathematical and geometric calculations for graphics rendering.
  • Processor 810 may include one or more GPUs that execute program instructions to generate or alter display information.
  • Display screen 894 is used to display images, videos, and the like.
  • Display screen 894 includes a display panel.
  • the display panel can be a liquid crystal display (LCD), an organic light-emitting diode (OLED), an active-matrix organic light-emitting diode or an active-matrix organic light-emitting diode (active-matrix organic light-emitting diode).
  • LCD liquid crystal display
  • OLED organic light-emitting diode
  • active-matrix organic light-emitting diode active-matrix organic light-emitting diode
  • AMOLED flexible light-emitting diode
  • FLED flexible light-emitting diode
  • Miniled MicroLed, Micro-oLed
  • quantum dot light-emitting diode quantum dot light emitting diodes, QLED
  • the data transmission device 800 may include one or more display screens 894 .
  • the display screen 894 in FIG. 14 can be bent.
  • the above-mentioned display screen 894 can be bent means that the display screen can be bent to any angle at any position, and can be maintained at this angle, for example, the display screen 894 can be folded from the middle to left and right. It can also be folded up and down from the middle.
  • a display screen that can be bent is called a foldable display screen.
  • the touch display screen may be one screen, or may be a display screen formed by piecing together multiple screens, which is not limited herein.
  • the display screen 894 of the data transmission device 800 may be a flexible screen.
  • the flexible screen has attracted much attention due to its unique characteristics and great potential.
  • flexible screens have the characteristics of strong flexibility and bendability, which can provide users with new interactive methods based on bendable characteristics, and can meet more needs of users for terminals.
  • the foldable display screen on the data transmission device can be switched between a small screen in a folded state and a large screen in an unfolded state at any time. Therefore, users use the split-screen function more and more frequently on data transmission devices equipped with foldable display screens.
  • the data transmission device 800 can realize the shooting function through the ISP, the camera 893, the video codec, the GPU, the display screen 894 and the application processor.
  • the ISP is used to process the data fed back by the camera 893. For example, when taking a photo, the shutter is opened, the light is transmitted to the camera photosensitive element through the lens, the light signal is converted into an electrical signal, and the camera photosensitive element transmits the electrical signal to the ISP for processing, and converts it into an image visible to the naked eye. ISP can also perform algorithm optimization on image noise, brightness, and skin tone. ISP can also optimize the exposure, color temperature and other parameters of the shooting scene. In some embodiments, the ISP may be located in the camera 893.
  • the camera 893 is used to capture still images or video.
  • the object is projected through the lens to generate an optical image onto the photosensitive element.
  • the photosensitive element may be a charge coupled device (CCD) or a complementary metal-oxide-semiconductor (CMOS) phototransistor.
  • CMOS complementary metal-oxide-semiconductor
  • the photosensitive element converts the optical signal into an electrical signal, and then transmits the electrical signal to the ISP to convert it into a digital image signal.
  • the ISP outputs the digital image signal to the DSP for processing.
  • DSP converts digital image signals into standard RGB, YUV and other formats of image signals.
  • the data transmission apparatus 800 may include one or more cameras 893 .
  • a digital signal processor is used to process digital signals, in addition to processing digital image signals, it can also process other digital signals. For example, when the data transmission device 800 selects a frequency point, the digital signal processor is used to perform Fourier transform on the energy of the frequency point, and so on.
  • Video codecs are used to compress or decompress digital video.
  • the data transmission apparatus 800 may support one or more video codecs.
  • the data transmission device 800 can play or record videos in various encoding formats, such as: Moving Picture Experts Group (MPEG) 1, MPEG2, MPEG3, MPEG4 and so on.
  • MPEG Moving Picture Experts Group
  • MPEG2 MPEG2, MPEG3, MPEG4 and so on.
  • the NPU is a neural-network (NN) computing processor.
  • NPU neural-network
  • Applications such as intelligent cognition of the data transmission device 800 can be implemented through the NPU, such as image recognition, face recognition, speech recognition, text understanding, and the like.
  • the external memory interface 820 can be used to connect an external memory card, such as a Micro SD card, so as to expand the storage capacity of the data transmission device 800.
  • the external memory card communicates with the processor 810 through the external memory interface 820 to realize the data storage function. For example to save files like music, video etc in external memory card.
  • Internal memory 821 may be used to store one or more computer programs including instructions.
  • the processor 810 may execute the above-mentioned instructions stored in the internal memory 821, thereby causing the data transmission apparatus 800 to execute the data transmission method, the communication method, and various applications and data processing provided in some embodiments of the present application.
  • the internal memory 821 may include a storage program area and a storage data area.
  • the stored program area may store an operating system; the stored program area may also store one or more applications (such as a library, contacts, etc.) and the like.
  • the storage data area may store data (such as photos, contacts, etc.) created during the use of the data transmission device 800 and the like.
  • the internal memory 821 may include high-speed random access memory, and may also include non-volatile memory, such as one or more disk storage components, flash memory components, universal flash storage (UFS), and the like.
  • the processor 810 may execute the instructions stored in the internal memory 821 and/or the instructions stored in the memory provided in the processor 810 to cause the data transmission apparatus 800 to execute the instructions provided in the embodiments of the present application The method of off-screen display, as well as other applications and data processing.
  • the data transmission apparatus 800 may implement audio functions through an audio module 870, a speaker 870A, a receiver 870B, a microphone 870C, an earphone interface 870D, and an application processor. Such as music playback, recording, etc.
  • the sensor module 880 may include a pressure sensor 880A, a gyro sensor 880B, an air pressure sensor 880C, a magnetic sensor 880D, an acceleration sensor 880E, a distance sensor 880F, a proximity light sensor 880G, a fingerprint sensor 880H, a temperature sensor 880J, a touch sensor 880K, and an ambient light sensor 880L, bone conduction sensor 880M, etc.
  • This embodiment also provides a computer storage medium, where computer instructions are stored in the computer storage medium, and when the computer instructions are executed on the data transmission device, the data transmission device is made to execute the above-mentioned relevant method steps to realize the data transmission in the above-mentioned embodiments. method.
  • This embodiment also provides a computer program product, which when the computer program product runs on the computer, causes the computer to execute the above-mentioned relevant steps, so as to realize the data transmission method in the above-mentioned embodiment.
  • the embodiments of the present application also provide an apparatus, which may specifically be a chip, a component or a module, and the apparatus may include a connected processor and a memory; wherein, the memory is used to store computer execution instructions, and when the apparatus is running, The processor can execute the computer-executed instructions stored in the memory, so that the chip executes the data transmission method in each of the above method embodiments.
  • FIG. 15 shows a schematic structural diagram of a chip 900 .
  • the data transmission device in this application may be the chip 900 .
  • the chip 900 includes one or more processors 910 and an interface circuit 920 .
  • the chip 900 may further include a bus 930 .
  • the processor 910 may be an integrated circuit chip with signal processing capability. In the implementation process, each step of the above-mentioned method 200 may be completed by an integrated logic circuit of hardware in the processor 910 or an instruction in the form of software.
  • processor 910 may be a general-purpose processor, DSP, ASIC, FPGA or other programmable logic devices, discrete gate or transistor logic devices, and discrete hardware components.
  • a general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
  • Interface circuitry 920 may be used to communicate with other devices.
  • the interface circuit 920 can be used to send or receive data, instructions or information.
  • the processor 910 can use the data, instructions or other information received by the interface circuit 920 to process, and can send the processing completion information through the interface circuit 920.
  • the above other device may be the second node or the device in the second node described in the above embodiment (for example, the data transmission in the second node) device).
  • the above-mentioned other device may be the first node or the device in the first node (such as the data in the first node) described in the above-mentioned embodiment. transmission device).
  • the chip further includes a memory, which may include a read-only memory and a random access memory, and provides operation instructions and data to the processor.
  • a portion of the memory may also include non-volatile random access memory (NVRAM).
  • NVRAM non-volatile random access memory
  • the memory stores executable software modules or data structures
  • the processor may execute corresponding operations by calling operation instructions stored in the memory (the operation instructions may be stored in the operating system).
  • the chip may be used in the first control apparatus, the second control apparatus, or the terminal device involved in the embodiments of the present application.
  • the interface circuit 920 may be used to output the execution result of the processor 910 .
  • processor 910 and the interface circuit 920 can be implemented by hardware design, software design, or a combination of software and hardware, which is not limited here.
  • the data transmission device, computer storage medium, computer program product or chip provided in this embodiment are all used to execute the corresponding method provided above. Therefore, for the beneficial effects that can be achieved, refer to the corresponding provided above. The beneficial effects of the method are not repeated here.
  • This embodiment also provides a cabin system.
  • the cockpit system includes the above-mentioned data transmission device 300 , data transmission device 500 , data transmission device 700 , or data transmission device 900 .
  • This embodiment also provides a terminal, which may be a transportation tool or a smart device, including smart home devices, smart wearable devices, drones, unmanned transport vehicles, cars, or robots.
  • the terminal includes any one of the above-mentioned data transmission apparatus 200 , data transmission apparatus 300 , data transmission apparatus 400 , data transmission apparatus 500 , data transmission apparatus 600 , data transmission apparatus 700 , data transmission apparatus 800 , or data transmission apparatus 900 .
  • the terminal includes the above-mentioned cockpit system.
  • This embodiment also provides a vehicle, which includes a data transmission device, and the data processing device is used to implement the function of the first node in the above-mentioned data transmission method or communication method.
  • the vehicle may include any one of the data transmission device 300 , the data transmission device 500 , the data transmission device 700 , or the data transmission device 900 described above.
  • the size of the sequence numbers of the above-mentioned processes does not mean the sequence of execution, and the execution sequence of each process should be determined by its functions and internal logic, and should not be dealt with in the embodiments of the present application. implementation constitutes any limitation.
  • the disclosed system, apparatus and method may be implemented in other manners.
  • the apparatus embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented.
  • the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.
  • the functions, if implemented in the form of software functional units and sold or used as independent products, may be stored in a computer-readable storage medium.
  • the technical solution of the present application can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution, and the computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage medium includes: U disk, mobile hard disk, read only memory (Read Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program codes.

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Abstract

本申请提供一种数据传输方法及装置，涉及通信技术领域，尤其是短距离通信，例如座舱域。有利于提高传输效率、降低系统开销和时延。该方法包括：第二节点接收来自第一节点的第一配置信息。其中，第一配置信息用于配置第一时频资源。第二节点获取第一逻辑信道对应的第一信息，其中第一信息用于指示是否允许对第一逻辑信道中的数据包分段，第一逻辑信道对应第二时频资源，第二时频资源包含于第一时频资源。第二节点通过第一时频资源向第一节点发送第一数据。本申请应用于数据传输。

Description

一种数据传输方法及装置 技术领域
本申请实施例涉及通信技术领域，尤其涉及一种数据传输方法及装置。
背景技术
随着全球通信技术的不断发展，无线通信技术的发展速度与应用已经超过了固定通信技术，呈现出如火如荼的发展态势。智能运输设备、智能家居设备、机器人等智能终端正在逐步进入人们的日常生活中。
以智能终端为智能运输设备为例，车联网技术的发展与应用越来越受到人们的关注。由于相比现有的有线通信，车载无线可以进一步降低车内线束数量、长度、重量，以及与之对应的安装、维护、保养成本，车载通信技术有逐步无线化的趋势。随着车载应用的多样化，车内通信节点数量、类型都越来越多，对于车载通信的能力提出了更高的要求。
对于智能运输设备来说，随着智能座舱技术的不断发展，车辆不仅是运输工具，更是人们生活的空间之一。人们期望智能座舱能为人们提供更加丰富的娱乐和办公体验。
目前，智能座舱中涉及到的设备主要有座舱域控制器(cockpit domain controller，CDC)和终端设备。其中，终端设备包括车载显示器、车载扬声器以及车载麦克风等车载终端设备，还包括智能终端等非车载终端设备。通常，座舱域控制器与上述终端设备采用有线方式连接，用于实现两者间数据的传输。但是，有线连接方式会受到线缆成本以及车内布线等因素的制约，因此越来越多的解决方案中，开始尝试基于无线方式来实现座舱域控制器与终端设备的连接，以便两者基于建立的无线连接进行数据的传输。
在座舱域控制器与终端设备之间基于无线连接进行数据传输的过程中，可能存在用于承载数据的时频资源的大小与需要传输的上层数据包的大小不匹配的情况。这种情况下，就需要对数据包进行分段，并对分段数据添加额外的包头信息，例如分段偏移量信息，从而使接收端能够根据包头信息对分段数据进行拼接得到完整的数据包。
而当被传输的数据包为数据量较小的小包时，若对其进行分段传输，添加额外的信息，则会严重影响时频资源中有效负载的占比，因此极大的增加系统开销。此外，在发送端对数据进行分段、在接收端对分段数据进行拼接也会增加处理时延。
发明内容
本申请提供一种数据传输方法及装置，有利于提高传输效率、降低系统开销和时延。
第一方面，本申请提供一种数据传输方法，该方法可以应用于通信系统，该通信系统中可以包括多个传输节点，其中多个传输节点之间可以进行数据传输。以通信系统中第二节点向第一节点发送数据为例，该方法包括：第二节点接收来自第一节点的第一配置信息。其中，第一配置信息用于配置第一时频资源。第二节点获取第一逻辑 信道对应的第一信息，其中第一信息用于指示是否允许对第一逻辑信道中的数据包分段，第一逻辑信道对应第二时频资源，第二时频资源包含于第一时频资源。第二节点通过第一时频资源向第一节点发送第一数据。
因此基于上述方法，在发送第一逻辑信道中的数据包时，可以控制是否允许对第一逻辑信道中的数据包进行分段。进一步的，当第一逻辑信道用于传输小包时，可以通过使第一信息指示不允许对第一逻辑信道中的数据进行分段，从而避免对小包进行分段，进而提高时频资源中有效负载的占比，降低系统开销和时延。
在一种可能的设计中，考虑到在需要传输第一逻辑信道中的数据包的情况下，是否能够通过第一逻辑信道所对应第二时频资源来发送第一逻辑信道中的数据包，一方面会受到第一信息所指示的内容的影响，例如若第一信息用于指示不允许对第一逻辑信道中的数据包分段，那么当通过第二时频资源发送第一逻辑信道中的数据包就会对第一逻辑信道中的数据包分段的这种场景下，就无法通过第二时频资源来发送第一逻辑信道中的数据包。另一方面，是否能够通过第一逻辑信道所对应第二时频资源来发送第一逻辑信道中的数据包，还受到第二时频资源大小的影响。
因此该方法中，是否通过第二时频资源发送第一逻辑信道中的数据包，具体可以是根据第一信息和第二时频资源中的至少一个来确定。
在一种可能的设计中，在上述方法中，第一数据不包含第一逻辑信道中的数据包，并且：
其中，第一信息用于指示不允许对第一逻辑信道中的数据包分段，并且第二时频资源的大小不足以承载第一逻辑信道中的所有数据包。
也就是说，在上述设计中，若第一信息用于指示不允许对第一逻辑信道中的数据包分段，并且第二时频资源的大小不足以承载第一逻辑信道中的所有数据包，则第一数据不包含第一逻辑信道中的数据包。这样一来，就可以避免对第一逻辑信道中的数据包进行分段。例如，本申请所提供方法在具体实施过程中，在第一信息指示不允许对第一逻辑信道中的数据包分段的情况下，可以通过判断第二时频资源的大小是否足以承载第一逻辑信道中的所有数据包，若确定第二时频资源的大小不足以承载第一逻辑信道中的所有数据包，则不通过第二时频资发送第一逻辑信道中的数据包(第一数据不包含第一逻辑信道中的数据包)的这一方式，来避免对第一逻辑信道中的数据包进行分段。
或者，其中，所述第一信息用于指示不允许对第一逻辑信道中的数据包分段，并且所述第二时频资源的大小不足以承载所述第一逻辑信道中的任一数据包或者第一个数据包。
也就是说，在上述设计中，若第一信息用于指示不允许对第一逻辑信道中的数据包分段，并且第二时频资源的大小不足以承载第一逻辑信道中的任一数据包或者第一个数据包，则第一数据不包含第一逻辑信道中的数据包。这样一来，就可以避免对第一逻辑信道中的数据包进行分段。例如，本申请所提供方法在具体实施过程中，在第一信息指示不允许对第一逻辑信道中的数据包分段的情况下：可以通过判断第二时频资源的大小是否足以承载第一逻辑信道中任一数据包，若确定第二时频资源的大小不足以承载第一逻辑信道中任一数据包，则不通过第二时频资发送第一逻辑信道中的数 据包的这一方式，来避免对第一逻辑信道中的数据包进行分段；或者，在第一逻辑信道中的数据包对应有发送顺序的情况下，可以通过判断第二时频资源的大小是否足以承载第一逻辑信道中第一个数据包，若确定第二时频资源的大小不足以承载第一逻辑信道中第一个数据包，则不通过第二时频资发送第一逻辑信道中的数据包的这一方式，来避免对第一逻辑信道中的数据包进行分段。
在一种可能的设计中，在上述方法中，第一数据中包含第一逻辑信道中的至少一个数据包；通过第一时频资源向第一节点发送第一数据，包括：根据第一信息或者第二时频资源的大小中至少一个，通过第二时频资源向第一节点发送上述第一逻辑信道中的至少一个数据包。也就是说，本申请所提供方法在具体实施过程中，可以根据第一信息和/或第二时频资源的大小，确定是否通过第二时频资源向第一节点发送第一逻辑信道中的至少一个数据包，即确定第一数据是否包含第一逻辑信道中的至少一个数据包。
在一种可能的设计中，在上述方法中，第一数据中包含第一逻辑信道中的所有数据包。其中，第二时频资源的大小足以承载第一逻辑信道中的所有数据包。也就是说，可以在确定第二时频资源的大小足以承载第一逻辑信道中的所有数据包后，不用考虑第一信息指示的内容，便使第一数据中包含第一逻辑信道中的所有数据包以将第一逻辑信道中的数据包进行发送，例如可以将第一逻辑信道中的所有数据包承载在第二时频资源中进行发送。
在上述设计中，考虑到在第二时频资源的大小足以承载第一逻辑信道中的所有数据包的情况下，无论第一信息指示不允许对第一逻辑信道中的数据包分段还是指示允许对第一逻辑信道中的数据包分段，此时都通过不对第一逻辑信道中的数据包分段的方式，将第一逻辑信道中的所有数据包承载在第二时频资源中发送至第一节点。因此，基于上述设计，可以在第二时频资源的大小足以承载第一逻辑信道中的所有数据包的情况下，简化第二节点的处理过程，即可以在不对第一信息进行处理的情况下，将第一逻辑信道中的所有数据包进行发送。
在一种可能的设计中，在上述方法中，第一数据中包含第一逻辑信道中的至少一个数据包。其中，第一信息用于指示不允许对第一逻辑信道中的数据包分段。第二时频资源的大小不足以承载第一逻辑信道中所有数据包并且第二时频资源的大小足以承载上述至少一个数据包。也就是说，在第一信息用于指示不允许对第一逻辑信道中的数据包分段的情况下，若第二时频资源的大小不足以承载第一逻辑信道中的所有数据包，但是第二时频资源的大小足以承载第一逻辑信道中的至少一个数据包，则可以通过使第一数据中包含第一逻辑信道中的至少一个数据包的这一方式来传输数据。
在一种可能的设计中，在上述方法中，第一逻辑信道对应于第一数据队列，所述第一逻辑信道中的数据包包含业务数据包，或者所述第一逻辑信道中的数据包包含控制信令。基于上述设计，当第一逻辑信道中的数据包指业务数据包时，通过使第一信息指示不允许对第一逻辑信道中的数据包分段，便可以保证第一逻辑信道中的业务数据包在传输过程中不被分段。或者，当第一逻辑信道中的数据包指控制信令时，通过使第一信息指示不允许对第一逻辑信道中的数据包分段，便可以保证控制信令在传输过程中不被分段。
在一种可能的设计中，所述第一逻辑信道对应于第一协议栈实体，第一逻辑信道中的数据包为第一协议栈实体中的服务数据单元SDU。基于上述设计，可以通过第一信息，指示是否允许对第一协议栈实体中的服务数据单元进行分段。
在一种可能的设计中，在上述方法中，获取第一逻辑信道对应的第一信息，包括：接收来自第一节点的第二配置信息；第二配置信息用于配置第一逻辑信道对应的第一信息。基于上述设计，可以通过第一节点来控制是否允许对第一逻辑信道中的数据包分段。
在一种可能的设计中，在上述方法中，获取第一逻辑信道对应的第一信息，包括：根据所述第一逻辑信道中的数据对应的服务质量QoS信息或业务类型，确定所述第一逻辑信道对应的所述第一信息。基于上述设计，可以使第一逻辑信道中的数据包的发送方式与第一逻辑信道对应的服务质量QoS信息或业务类型相匹配。
在一种可能的设计中，在上述方法中，第一数据中包含第二逻辑信道中的至少一个数据包。基于上述设计，可以在第一数据中承载多个逻辑信道的数据包。
在一种可能的设计中，在上述方法中，上述第二逻辑信道的优先级低于第一逻辑信道的优先级。基于上述设计，可以在第一数据中承载优先级不同的多个逻辑信道的数据包。
第二方面，本申请提供一种数据传输方法，该方法包括：第一节点向第二节点发送第一配置信息和第二配置信息。其中，第一配置信息用于配置第一时频资源；第二配置信息用于指示是否允许对第一逻辑信道中的数据包分段。其中，第一逻辑信道对应第二时频资源，第二时频资源包含于第一时频资源。第一节点通过第一时频资源接收来自第二节点的第一数据。
因此基于上述方法，可以在第二节点发送第一逻辑信道中的数据包时，控制是否允许对第一逻辑信道中的数据包进行分段。进一步的，当第一逻辑信道用于传输小包时，可以通过使第一信息指示不允许对第一逻辑信道中的数据包进行分段，从而避免对小包进行分段，进而提高时频资源中有效负载的占比，降低系统开销。
在一种可能的设计中，在上述方法中，第一逻辑信道对应于第一数据队列，所述第一逻辑信道中的数据包包含业务数据包，或者所述第一逻辑信道中的数据包包含控制信令。基于上述设计，当第一逻辑信道中的数据包指业务数据包时，通过使第一信息指示不允许对第一逻辑信道中的数据包分段，便可以保证第一逻辑信道中的业务数据包在传输过程中不被分段。或者，当第一逻辑信道中的数据包指控制信令时，通过使第一信息指示不允许对第一逻辑信道中的数据包分段，便可以保证控制信令在传输过程中不被分段。
在一种可能的设计中，所述第一逻辑信道对应于第一协议栈实体，第一逻辑信道中的数据包为第一协议栈实体中的服务数据单元SDU。基于上述设计，可以通过第一信息，指示是否允许对第一协议栈实体中的服务数据单元进行分段。
在一种可能的设计中，在上述方法中，第一数据中包含第二逻辑信道中的至少一个数据包。基于上述设计，可以在第一数据中承载多个逻辑信道的数据包。
在一种可能的设计中，在上述方法中，上述第二逻辑信道的优先级低于第一逻辑信道的优先级。基于上述设计，可以在第一数据中承载优先级不同的多个逻辑信道的 数据包。
第三方面，本申请提供一种通信方法，该方法包括：第二节点接收来自第一节点的第一系统广播消息。其中，第一系统广播消息中包括第一节点的身份信息。第二节点在确定第一节点的身份信息与预设身份信息一致后，向第一节点发送接入请求。上述方法中，在第二节点向第一节点发送接入请求之前，先由第二节点对第一节点的身份信息进行验证，在验证成功后再向第一节点发送接入请求。从而避免第二节点向错误的节点发送接入请求。例如，当第二节点为座舱域中的车载或非车载设备，第一节点为CDC时，可以避免第二节点与外界其他车辆上的CDC建立连接。
在一种可能的设计中，第一节点的身份信息可以为第一节点的设备标识、媒体访问控制(media access control，MAC)地址、软地址、短地址中的至少一项。
第四方面，本申请提供一种通信方法，该方法包括：第一节点向第二节点发送第一系统广播消息。其中，第一系统广播消息中包括第一节点的身份信息。第一节点接收来自第二节点的接入请求。
在一种可能的设计中，第一节点的身份信息可以为第一节点的设备标识、媒体访问控制(media access control，MAC)地址、软地址、短地址中的至少一项。
第五方面，本申请提供一种通信方法，该方法包括：第二节点接收来自第一节点的接入资源配置信息。其中，所述接入资源配置信息用于配置用于与所述第一节点建立连接(也称为接入)的接入资源。第二节点在配置的接入资源上向第一节点发送接入请求。
在一种可能的设计中，所述接入资源配置信息还包含所述接入资源对应的接入方式的信息，或者说所述接入资源配置信息还用于指示所述接入资源对应的接入方式。
在一种可能的设计中，所述接入资源配置信息可以是系统消息(System information)或者RRC信令。
在一种可能的设计中，当所述接入方式为竞争接入时，第二节点随机从所述接入资源中选择第一资源，并在所述第一资源上向第一节点发送接入请求。
在一种可能的设计中，其中在所述第一资源上向第一节点发送接入请求可以包括在所述第一资源上向第一节点发送接入请求向第一节点发送第二节点的第二身份信息。
在一种可能的设计中，当所述接入方式为非竞争接入方式时，第二节点根据第二节点的第二身份信息从所述接入资源中确定第二资源，并在所述第二资源上向第一节点发送接入请求。
在一种可能的设计中，所述在所述第二资源上向第一节点发送接入请求可以包括在所述第二资源上向第一节点发送第二节点的第三身份信息。
在一种可能的设计中，所述第二身份信息和第三身份信息可以相同或者不同所述第二身份信息或第三身份信息可以为设备标识、媒体访问控制(media access control，MAC)地址、软地址、短地址中的至少一项。
第六方面，本申请提供一种通信方法，该方法包括：第一节点向第二节点发送接入资源配置信息。其中，所述接入资源配置信息用于配置用于与所述第一节点建立连接(也称为接入)的接入资源。第一节点通过该接入资源接收来自第二节点的接入请 求。
在一种可能的设计中，所述接入资源配置信息还包含所述接入资源对应的接入方式的信息，或者说所述接入资源配置信息还用于指示所述接入资源对应的接入方式。
在一种可能的设计中，所述接入资源配置信息可以是系统消息(System information)或者RRC信令。
第七方面，本申请提供一种数据传输装置，该数据传输装置可以为芯片或者片上系统。该数据传输装置可以实现上述第一方面或者第一方面中可能的设计中所执行的功能。这些功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。硬件或软件包括一个或多个上述功能相应的模块。如：该数据传输装置可以包括：接收单元，用于接收来自第一节点的第一配置信息，所述第一配置信息用于配置第一时频资源；获取单元，用于获取第一逻辑信道对应的第一信息，所述第一信息用于指示是否允许对所述第一逻辑信道中的数据包分段；其中，所述第一逻辑信道对应第二时频资源，所述第二时频资源包含于所述第一时频资源；发送单元，用于通过所述第一时频资源向所述第一节点发送第一数据。当然，该数据传输装置中还可以包括更多或更少的单元，用于实现终端设备其他的功能。
第八方面，本申请提供一种数据传输装置，该数据传输装置可以为芯片或者片上系统。该数据传输装置可以实现上述第二方面或者第二方面中可能的设计中所执行的功能。这些功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。硬件或软件包括一个或多个上述功能相应的模块。如：该数据传输装置可以包括：发送单元，用于向第二节点发送第一配置信息；所述配置信息用于配置第一时频资源；所述发送单元，还用于第二配置信息；所述第二配置信息用于指示是否允许对第一逻辑信道中的数据包分段；所述第一逻辑信道对应第二时频资源，所述第二时频资源包含于所述第一时频资源；接收单元，用于通过所述第一时频资源接收来自所述第二节点的第一数据。当然，该数据传输装置中还可以包括更多或更少的单元，用于实现终端设备其他的功能。
第九方面本申请提供一种数据传输装置，该数据传输装置可以为芯片或者片上系统。该数据传输装置可以实现上述第三方面或者第三方面中可能的设计中所执行的功能。这些功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。硬件或软件包括一个或多个上述功能相应的模块。如：该数据传输装置可以包括：接收单元，用于接收来自第一节点的第一系统广播消息。其中，第一系统广播消息中包括第一节点的身份信息。发送单元，在确定第一节点的身份信息与预设身份信息一致后，向第一节点发送接入请求。当然，该数据传输装置中还可以包括更多或更少的单元，用于实现终端设备其他的功能。
第十方面本申请提供一种数据传输装置，该数据传输装置可以为芯片或者片上系统。该数据传输装置可以实现上述第四方面或者第四方面中可能的设计中所执行的功能。这些功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。硬件或软件包括一个或多个上述功能相应的模块。如：该数据传输装置可以包括：发送单元，向第二节点发送第一系统广播消息。其中，第一系统广播消息中包括第一节点的身份信息。接收单元，接收来自第二节点的接入请求。当然，该数据传输装置中还可以包括 更多或更少的单元，用于实现终端设备其他的功能。
第十一方面本申请提供一种数据传输装置，该数据传输装置可以为芯片或者片上系统。该数据传输装置可以实现上述第五方面或者第五方面中可能的设计中所执行的功能。这些功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。硬件或软件包括一个或多个上述功能相应的模块。如：该数据传输装置可以包括：接收单元，用于接收来自第一节点的接入资源配置信息。其中，所述接入资源配置信息用于配置用于与所述第一节点建立连接(也称为接入)的接入资源。发送单元，用于第二节点在配置的接入资源上向第一节点发送接入请求。当然，该数据传输装置中还可以包括更多或更少的单元，用于实现终端设备其他的功能。
第十二方面本申请提供一种数据传输装置，该数据传输装置可以为芯片或者片上系统。该数据传输装置可以实现上述第三方面或者第三方面中可能的设计中所执行的功能。这些功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。硬件或软件包括一个或多个上述功能相应的模块。如：该数据传输装置可以包括：发送单元，用于向第二节点发送接入资源配置信息。其中，所述接入资源配置信息用于配置用于与所述第一节点建立连接(也称为接入)的接入资源。接收单元，用于第一节点通过该接入资源接收来自第二节点的接入请求。当然，该数据传输装置中还可以包括更多或更少的单元，用于实现终端设备其他的功能。
第十三方面，本申请提供一种数据传输装置，该数据传输装置包括一个或多个处理器，该一个或多个处理器和一个或多个存储器耦合。该一个或多个存储器存储有计算机指令。当该一个或多个处理器执行该计算机指令时，使得该数据传输装置执行上述第一方面或者第一方面中可能的设计中第二节点所执行的数据传输方法，或者，当该一个或多个处理器执行该计算机指令时，使得该数据传输装置执行上述第二方面或者第二方面中可能的设计中第一节点所执行的数据传输方法，或者，当该一个或多个处理器执行该计算机指令时，使得该数据传输装置执行上述第三方面或者第三方面中可能的设计中第二节点所执行的通信方法。当该一个或多个处理器执行该计算机指令时，使得该数据传输装置执行上述第四方面或者第四方面中可能的设计中第一节点所执行的通信方法。当该一个或多个处理器执行该计算机指令时，使得该数据传输装置执行上述第五方面或者第五方面中可能的设计中第二节点所执行的通信方法。当该一个或多个处理器执行该计算机指令时，使得该数据传输装置执行上述第六方面或者第六方面中可能的设计中第一节点所执行的通信方法。
第十四方面，本申请提供了一种计算机可读存储介质，该计算机可读存储介质中存储有指令，当该指令运行时，执行上述第一方面或者第一方面中可能的设计中第二节点所执行的数据传输方法，或者，当该指令运行时，执行上述第二方面或者第二方面中可能的设计中第一节点所执行的数据传输方法，或者，当该指令运行时，执行上述第三方面或者第三方面中可能的设计中第二节点所执行的通信方法，当该指令运行时，执行上述第四方面或者第四方面中可能的设计中第一节点所执行的数据传输方法，或者，当该指令运行时，执行上述第五方面或者第五方面中可能的设计中第二节点所执行的数据传输方法，或者，当该指令运行时，执行上述第六方面或者第六方面中可能的设计中第一节点所执行的通信方法。
第十五方面，本申请提供一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机可以执行上述第一方面或者第一方面中可能的设计中第二节点所执行的数据传输方法，或者，使得计算机可以执行上述第二方面或者第二方面中可能的设计中第一节点所执行的数据传输方法，或者，使得计算机可以执行上述第三方面或者第三方面中可能的设计中第二节点所执行的通信方法，或者，使得计算机可以执行上述第四方面或者第四方面中可能的设计中第一节点所执行的数据传输方法，或者，使得计算机可以执行上述第五方面或者第五方面中可能的设计中第二节点所执行的数据传输方法，或者，使得计算机可以执行上述第六方面或者第六方面中可能的设计中第一节点所执行的通信方法。
第十六方面，本申请提供一种芯片，芯片包括处理电路和接口；处理电路用于从存储介质中调用并运行存储介质中存储的计算机程序，以执行如上述第一方面或者第一方面中可能的设计中所提供的数据传输方法，或者以执行如上述第二方面或者第二方面中可能的设计中所提供的数据传输方法，或者以执行如上述第三方面或者第三方面中可能的设计中第二节点所执行的通信方法，或者以上述第四方面或者第四方面中可能的设计中第一节点所执行的数据传输方法，或者以执行上述第五方面或者第五方面中可能的设计中第二节点所执行的数据传输方法，或者以执行上述第六方面或者第六方面中可能的设计中第一节点所执行的通信方法。
第十七方面，本申请提供一种数据传输系统，该数据传输系统包括两个或多个如上述第七方面至第十二方面提供的数据传输装置。
第十八方面，本申请保护一种座舱系统，该座舱系统包括上述第七方面或者第九方面所述的数据传输装置，和/或,上述第八方面或者第十方面所述的数据传输装置。
第十九方面，本申请保护一种终端，所述终端可以为运输工具或者智能设备，包含无人机、无人运输车、智能汽车或者机器人等。所述终端包括上述座舱系统。
示例性地，第七方面至第十九方面中任一种设计方式均可对应到上述第一方面至第六方面，因此，能够带来类似的技术效果，此处不再赘述。
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图1为本申请实施例提供的一种通信系统的结构示意图之一；
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图3A为本申请实施例提供的一种MAC PDU的格式示意图一；
图3B为本申请实施例提供的一种MAC PDU的格式示意图二；
图4为本申请实施例提供的一种RLC PDU的封装过程的示意图；
图5为本申请实施例提供的一种数据传输方法的流程示意图；
图6为本申请实施例提供的一种通信方法的流程示意图之一；
图7为本申请实施例提供的一种通信方法的流程示意图之二；
图8为本申请实施例提供的一种数据传输装置的结构示意图之一；
图9为本申请实施例提供的一种数据传输装置的结构示意图之二；
图10为本申请实施例提供的一种数据传输装置的结构示意图之三；
图11为本申请实施例提供的一种数据传输装置的结构示意图之四；
图12为本申请实施例提供的一种数据传输装置的结构示意图之五；
图13为本申请实施例提供的一种数据传输装置的结构示意图之六；
图14为本申请实施例提供的一种数据传输装置的结构示意图之七；
图15为本申请实施例提供的一种芯片的结构示意图。
具体实施方式
下面将结合附图，对本申请中的技术方案进行描述。为了便于清楚描述本申请实施例的技术方案，在本申请的实施例中，采用了“第一”、“第二”等字样对功能和作用基本相同的相同项或相似项进行区分。本领域技术人员可以理解“第一”、“第二”等字样并不对数量和执行次序进行限定，并且“第一”、“第二”等字样也并不限定一定不同。同时，在本申请实施例中，“示例性的”或者“例如”等词用于表示作例子、例证或说明。本申请实施例中被描述为“示例性的”或者“例如”的任何实施例或设计方案不应被解释为比其它实施例或设计方案更优选或更具优势。确切而言，使用“示例性的”或者“例如”等词旨在以具体方式呈现相关概念，便于理解。
对本申请实施例提供的一种数据发送方法及装置中涉及的一些概念做解释说明。
逻辑信道：一般的，不同的业务往往具有不同的服务质量(Quality of Service，Qos)需求，因此可以为不同的业务建立不同的逻辑信道，从而保障保证不同业务的差异化Qos需求。例如，为音频业务、视频业务分别建立不同的逻辑信道。当然，可以理解的，也可以为Qos需求相近的一个或者多个业务建立相同的逻辑信道，从而减少逻辑信道数量，便于管理。
需要说明的是，逻辑信道是一个抽象的概念，不同的逻辑信道中的数据对应于该逻辑信道中的一种或者多种业务数据。可选地，业务数据可以是业务数据包，业务数据也可以是一个业务数据包队列。
更广义的逻辑信道概念为：逻辑信道根据传输内容的属性来进行区分。例如，逻辑信道可以分为两类：控制信道和业务信道，控制信道用于传输控制面信息，而业务信道用于传输用户面信息(例如业务数据)。示例性的，控制信道又可分为公共控制信道和专用控制信道。
可选的，在具体的协议栈中，一个逻辑信道可以对应于一个或多个协议实体。以LTE(Long term evolution，长期演进)系统为例，单个逻辑信道对应单个无线链路控制层(radio link control，RLC)实体。LTE系统的用户面协议栈包括数据汇聚协议层(Packet Data Convergence Protocol，PDCP)，RLC层，媒体接入层(Media Access Control，MAC)层和物理层(Physical，PHY)。
例如，对于网络层数据包，本发明称为业务数据包，例如，网络层传递下来的IP数据包，该数据包会传递到PDCP实体。在PDCP实体，该IP数据包会被看做PDCP层SDU(Service Date Unit)，PDCP实体会处理该IP数据包，例如为该数据包添加PDCP层包头信息，处理完成之后的数据称为PDCP PDU(Protocol Data Unit)；同样的道理，该PDCP PDU会通过层间服务单元(Service Access Point，SAP)传递到RLC层，则该PDCP PDU会被看做是RLC层SDU，经过RLC层处理，例如添加RLC层包头，之后生成RLC PDU。可以理解的，在接收端，对等的协议层会解析数据包包头，例如，拆除包头，并得到SDU。
可以理解的，对于某个协议层，其也可以对SDU不作处理，即生成的PDU包含SDU，且大小等于SDU，不包含任何包头信息，即可以理解为透明传输(Transparency)，简称透传。
需要说明的是，本发明不限制具体的协议栈组成，因为也不限制逻辑信道具体对应于那个协议实体。示例性的，本发明逻辑信道可以与RLC实体对应，则逻辑信道中的数据对应于RLC层的SDU，不对逻辑信道中数据进行分段即不对RLC SDU进行分段；或者，本发明逻辑信道可以与PDCP实体对应，则逻辑信道中的数据对应于PDCP层SDU，不对逻辑信道中的数据进行分段即不对PDCP SDU进行分段。当然可以理解的，协议栈也可能包含其他层，命名也可以完全不同，本发明对此不进行限制。
图1示出了本申请实施例提供的通信系统100的结构示意图，该通信系统100包括至少一个通信域，图1中示出了通信域110，该通信域110包括主节点111和至少一个从节点112。如图1中以包括两个从节点112示出。
需要说明的是，本申请实施例中所述的主节点111，是指能够与从节点112进行通信，具有管理从节点112(如为从节点112调度资源)的能力的装置。
还需要说明的是，本申请实施例中所述的从节点112，是指能够听从主节点111的管理、具有使用主节点111分配的资源进行通信的能力的装置。
通信域110可以适用于多种环境本申请实施例对此不作限定。
在一种可能的实现方式中，该通信域110可以适用于机动车辆(例如智能车、电动车、数字汽车等)等的座舱(也称为车舱)环境。
在另一种可能的实现方式中，该通信域110可以适用于智能家居环境。
可选地，该主节点111与该从节点112之间可以通过多种方式进行通信，本申请实施例对此不作限定。例如，该主节点111可以通过无线方式与从节点112进行通信。
需要说明的是，上述无线方式可以为通过通信网络实现通信。该通信网络可以是局域网，也可以是通过中继(relay)设备转接的广域网，或者包括局域网和广域网。当该通信网络为局域网时，示例性的，该通信网络可以是wifi热点网络、wifi点到点(wifi peer-to-peer，wifi P2P)网络、蓝牙网络、zigbee网络、近场通信(near field communication，NFC)网或者未来可能的通用短距离通信网络等。当该通信网络为广域网时，示例性的，该通信网络可以是第三代移动通信技术(3rd-generation wireless telephone technology，3G)网络、第四代移动通信技术(the 4th generation mobile communication technology，4G)网络、第五代移动通信技术(5th-generation mobile communication technology，5G)网络、PLMN或因特网、甚至第六代或者第七代移动通信技术等，本申请实施例对此不作限定。
在一种可能的实现方式中，该主节点111可以为网络控制装置，该从节点112可以为终端设备。可选地，上述网络控制装置可以为多种形态，本申请实施例对此不作限定。
在一种可能的实现方式中，该网络控制装置可以是一个独立的设备。
在另一种可能的实现方式中，该网络控制装置可以作为功能模块或芯片装置集成在其他设备中。
需要说明的是，本申请实施例中所述的网络控制装置也可以称为接入设备或无线 接入网设备，可以是长期演进(long term evolution，LTE)系统中的演进型基站(evolved NodeB，eNB或eNodeB)，还可以是云无线接入网络(cloud radio access network，CRAN)场景下的无线控制器，或者该接入设备可以为中继站、接入点、车载设备、可穿戴设备以及5G网络中的接入设备或者未来演进的公共陆地移动网络(public land mobile network，PLMN)中的网络设备等，可以是无线局域网(wireless local area networks,WLAN)中的接入点(access point，AP)，可以是新型无线系统(new radio，NR)系统中的gNB，还可以是座舱域中的控制设备或者控制装置，还可以是包含智能终端设备的场景中的控制设备或者控制装置，本申请实施例并不限定。
可选地，上述终端设备可以为多种形态，本申请实施例对此不作限定。
在一种可能的实现方式中，该终端设备可以是一个独立的设备。
在另一种可能的实现方式中，该终端设备可以作为功能模块或芯片装置集成在其他设备中。
需要说明的是，本申请实施例中所述的终端设备可以是一种向用户提供语音/数据连通性的设备，例如：具有无线连接功能的手持式设备、车载设备等。目前，一些终端设备的举例为：手机(mobile phone)、平板电脑、笔记本电脑、掌上电脑、移动互联网设备(mobile internet device，MID)、可穿戴设备，虚拟现实(virtual reality，VR)设备、增强现实(augmented reality，AR)设备、无人驾驶(self driving)中的无线终端、蜂窝电话、无绳电话、会话启动协议(session initiation protocol，SIP)电话、个人数字助理(personal digital assistant，PDA)、具有无线通信功能的手持设备、计算设备、车载设备、智能家居设备、可穿戴设备，5G网络中的终端设备或者未来演进的公用陆地移动通信网络(public land mobile network，PLMN)中的终端设备等，本申请实施例对此并不限定。
还需要说明的是，可穿戴设备也可以称为穿戴式智能设备，是应用穿戴式技术对日常穿戴进行智能化设计、开发出可以穿戴的设备的总称，如眼镜、手套、手表、服饰及鞋等。可穿戴设备即直接穿在身上，或是整合到用户的衣服或配件的一种便携式设备。
在一种可能的实现方式中，以上述通信域110适用于座舱域环境为例，按照终端设备与座舱的关系，终端设备可以包括以下两种终端类型：“车载终端设备”和“非车载终端设备”。
“车载终端设备”，也称为车载单元(on-board unit，OBU)，是指集成或安装在车辆内或车辆上的一部分的设备。可选的，可以是安装在座舱内的设备。例如：车载扬声器、车载麦克风、车载显示器、车载摄像头等。一般的，车载终端设备可以指由车辆制造商前装(factory-installed)在车辆上的设备。
“非车载终端设备”，是指放置在车辆上或车辆内、能够与其他设备进行通信或连接、但不属于该车辆的一部分的设备，例如：用户的智能手机、平板电脑、蓝牙耳机、可穿戴设备等智能终端。
在一种可能的实现方式中，该网络控制装置可以为座舱域控制器(cockpit domain controller，CDC)，该CDC可以与多个终端设备进行通信，该多个终端设备的类型可以包括车载终端设备或非车载终端设备中的至少一种终端类型。
当通信域110适用于座舱域环境，即主节点111为CDC、从节点112包括车载终端设备(如车载显示器、车载扬声器以及车载麦克风)和非车载终端设备(如智能终端)的情况下，通信系统100也可以是如图2所示架构。
目前，在主节点111与从节点112进行通信的过程中，由于物理层的时频资源的大小与上层数据包的大小不匹配，因此可以对上层数据包进行分段，并对分段数据添加额外的包头信息，例如分段偏移量信息，然后将分段后的数据进行传输。
以从节点112向主节点111发送业务数据为例，从节点112对待发送的业务数据的处理过程，以LTE系统MAC PDU生成过程为例，包括：
MAC层生成的一个MAC PDU中可以包含一个或者多个逻辑信道的MAC SDU(对应于RLC PDU)，其中每个逻辑信道分别对应一个RLC实体。
第一数据(MAC PDU)包含多个逻辑信道的数据时，即将多个逻辑信道的数据封装在一个MAC PDU时，上述MAC PDU的包头中包含多个逻辑信道各自的MAC SDU对应的子头。可以理解的，一般来说，MAC SDU对应的子头一般包含MAC SDU相关的信息。示例性的，MAC SDU子头可以包括MAC SDU对应的逻辑信道标识、MAC SDU的长度指示信息、MAC SDU是否是MAC PDU中最后一个SDU中的至少一项信息。可选地，图3A和图3B是两种可选地MAC PDU的封装格式。其中，如图3A所示，MAC SDU1的子头(sub-header)为子头1，MAC SDU1的子头为子头2，…，MAC SDU n的子头为子头n。在MAC PDU中，多个MAC SDU各自的子头统一封装在MAC PDU的帧头(MAC header)位置。如图3B所示，在MAC PDU中，多个MAC SDU各自的子头分别位于该MAC SDU的前部，即多个MAC SDU间隔排列。
MAC层会根据主节点为其(从节点)调度的时频资源的大小，以及当前逻辑信道的优先级等信息首先确定为每个逻辑信道分配的时频资源的大小；逻辑信道对应的RLC实体需要根据所述确定的时频资源的大小，生成至少一个RLC PDU，所述至少一个RLC PDU在MAC层被看做是MAC SDU。需要说明的，为了适配物理资源的大小，RLC实体在生成至少一个RLC PDU时，可能会对某个RLC SDU进行分段(Segmentation)。例如图4所示，RLC SDU被分为两部分，并分别添加独立的包头，生成RLC PDU1和RLC PDU2；其中本次只将RLC PDU1包含在MAC SDU中；可以理解的，RLC实体在确定RLC SDU应该如何分段的时候，也会考虑SDU对应的包头占用的比特长度(即，包头大小)，即RLC实体会综合考虑最终生成的包含RLC SDU分段的RLC PDU的大小。
例如，在座舱环境下，在座舱域控制器(即主节点)与终端设备(即从节点，例如车载扬声器或车载麦克风)之间进行传输的数据中，既有数据包数据量较大的数据，例如流媒体业务的数据；也有小包的数据，例如主动降噪业务的数据。其中，主动降噪业务通常的采样周期为48Khz，每个采样点的采样数据为16bit或24bit，也就是说主动降噪业务的数据包可以仅有16bit或24bit。在传输主动降噪业务的数据包的过程中，可能也会存在由于时频资源的大小与上层数据包的大小不匹配，需要将该主动降噪业务的数据包进行分段传输的需要。但是，若将该业务的数据包进行分段、添加额外信息，例如，分段偏移量信息(Segmentation offset)就会严重影响时频资源中有效负荷的占比，因此极大的增加系统开销。此外，在发送端对数据进行分段、在接收端 对分段数据进行拼接也会增加处理时延。
所为了解决上述问题，本申请实施例中提供一种数据传输方法，有利于提高传输效率、降低系统开销和时延。
以下对本申请实施例提供的数据传输方法进行详细介绍。
图5为本申请实施例提供的一种数据传输方法的流程示意图。如图5示，该方法包括：
S201、第二节点接收来自第一节点的第一配置信息。
当本申请实施例所提供的方法应用于上述通信系统100中时，第一节点可以是上述通信系统100中主节点111，第二节点可以是上述通信系统100中任一个从节点112。
示例性的，第一节点可以为各种形态的网络控制装置，第二节点可以是各种形态的终端设备。例如，当本申请实施例所提供的方法应用于座舱域环境中时，第一节点可以是CDC，第二节点可以是各种车载终端设备或者非车载终端设备。
其中，第一配置信息用于配置第一时频资源。
例如，第一配置信息中包括第一时频资源的时域资源信息和频域资源信息中的至少一个，或者第一配置信息中包括用于指示第一时频资源的时域资源的信息和频域资源的信息中的至少一个。第二节点在接收到第一配置信息后，可以根据第一配置信息确定第一时频资源，以便利用第一时频资源向第一节点发送数据。需要说明的是，若第一配置信息仅指示了所述时域资源或频域资源，则第二节点可以根据预先的配置或者标准的定义确定未被指示的时域资源或者频域资源，以确定所述第一时频资源。
在一种可能的设计中，第一配置信息可以为半静态资源配置信息，即所述第一配置信息配置的所述第一时频资源为半静态资源。
在另一种可能的设计中，第一配置信息可以为动态资源配置信息，以便通过动态配置的方式为第二节点配置上述第一时频资源。
在一种可能的设计中，第一配置信息可以承载在无线资源控制(Radio Resource Control，RRC)信令中。可选的，所述RRC信令包含系统信息(System information)。
在一种可能的设计中，第一配置信息也可以承载在物理层控制信道上，例如下行控制指示(Downlink Control Information，DCI)上。
在一种可能的设计中，第一配置信息也可以包含在管理帧中。管理帧可实现主节点与从节点之间的连接管理、资源配置等管理功能。
S202、第二节点获取第一逻辑信道对应的第一信息。
示例性的，第一逻辑信道，具体可以对应于第二节点中某个RLC实体，或者可以对应于某个业务的数据队列。例如，当第二节点为车载麦克风，第一节点为CDC时，第一逻辑信道中的数据可以是主动降噪业务对应数据队列，或者第一逻辑信道中的数据可以是第一RLC实体中的RLC SDU，其中第一RLC实体中的RLC SDU可以包含主动降噪业务数据。可以理解的是，第一逻辑信道也可能对应其他协议实体中的SDU，例如PDCP实体，对此本申请可以不做限制。
其中，第一逻辑信道对应的第一信息，用于指示是否允许对第一逻辑信道中的数据包分段。第一逻辑信道对应第二时频资源，第二时频资源包含于第一时频资源。
具体的，对于第一逻辑信道与第一信息的对应：
可以理解的，第二节点上可能对应多个逻辑信道。一般的，在考虑将哪些逻辑信道的数据包承载在所述第一时频资源上，和/或，不同的逻辑信道分别承载多少数据包时，需要综合考虑逻辑信道优先级、逻辑信道中的数据的大小等信息中的至少一个，一般的，这些可以由数据封装规则或协议约定，本申请不对具体的规则和约定方式做具体限定。
在一种示例中，第一逻辑信道对应第二时频资源可以是媒体接入层根据逻辑信道优先级、逻辑信道中的数据的大小等信息中的至少一个，为第一逻辑信道确定的、满足所述数据封装规则或者协议预定的时频资源。
在另外一种示例中，第一逻辑信道对应第二时频资源的大小可以是媒体接入层根据逻辑信道优先级等数据封装规则、逻辑信道中的数据的大小等信息中的至少一个，为第一逻辑信道确定的、满足所述数据封装规则或者协议预定的时频资源大小。具体的时频资源位置在该示例中暂不考虑。
可选的，第一逻辑信道对应于第一数据队列。例如第一逻辑信道用于传输第一数据队列中的数据包。是否允许对第一逻辑信道中的数据包进行分段可以是是否允许对第一逻辑信道中的业务数据包进行分段。
可选的，第一逻辑信道对应于第一协议栈实体，例如第一逻辑信道对应于RLC实体，也就是说第一逻辑信道用于传输来自该RLC实体的数据包。是否允许对第一逻辑信道中的数据包进行分段可以是是否允许对于所述第一逻辑信道对应的第一协议实体中的SDU进行分段；示例性的，所述第一协议实体可以是RLC实体，所述第一协议实体中的SDU可以是RLC SDU。下文多以第一逻辑信道对应RLC实体为例进行阐述，本领域技术人员可以理解，RLC实体可以替换为其它类型的协议栈实体，例如各种短距离无线通信系统中可能的实体类型。
也就是说，在需要传输第一逻辑信道中的数据包的情况下，是否能够通过第一逻辑信道所对应第二时频资源来发送第一逻辑信道中的数据包，一方面会受到第一信息所指示的内容的影响，例如若第一信息用于指示不允许对第一逻辑信道中的数据包分段，那么如果通过第二时频资源发送第一逻辑信道中的数据包必须对第一逻辑信道中的数据包分段，则基于第一信息的指示，实际无法通过第二时频资源来发送第一逻辑信道中的数据包。另一方面，是否能够通过第一逻辑信道所对应第二时频资源来发送第一逻辑信道中的数据包，还受到第二时频资源大小的影响。
换句话讲，是否通过第二时频资源发送第一逻辑信道中的数据包，具体可以是根据第一信息和第二时频资源中的至少一个来确定。
在一种可能的设计中，考虑到一些业务在传输过程中，若对这些业务的数据包进行分段，则可能会严重影响系统开销，同时增加处理时延。例如上述内容中提到的主动降噪业务的数据包就不适合进行分段。因此，上述第一逻辑信道中的数据包可以包括业务数据包。
进而第一信息具体用于指示是否允许对第一逻辑信道中的业务数据包分段。这样一来，当第一逻辑信道中的业务数据包是不适合分段的业务数据包时，便可以通过第一信息指示不允许对第一逻辑信道中的业务数据包分段，进而避免将第一逻辑信道中的业务数据包进行分段。
其中，业务数据包可以理解为承载某个业务的数据包。例如，承载主动降噪业务的数据包，承载视频业务的数据包等。可选的，业务数据包可以是网络层向下层传递的数据包。例如，承载视频业务数据的IP或者Non-IP数据包。可选的，业务数据包可以是应用层向下层传递的数据包。需要说明的，这里的下层是一个相对的概念。在另一种可能的设计中，考虑到控制信令在传输过程中，也可能存在不适合分段的情况。因此，可以通过第一信息来指示是否允许对第一逻辑信道中的控制信令分段。例如，所述控制信令可以为从节点发送给主节点的专用RRC信令。
即，上述第一逻辑信道中的数据包可以包括控制信令。需要说明的是，在一些场景下，控制信令也可以称为管理帧。
在一种可能的设计中，考虑到可以通过第一节点来控制是否允许对第一逻辑信道中的数据包分段，因此上述S202可以包括：
S202a、第二节点接收来自第一节点的第二配置信息。
其中，第二配置信息用于配置第一逻辑信道对应的第一信息。
与S201类似，第二配置信息也可以有多种不同的承载形式。第二配置信息可以承载在RRC信令中，或者，第二配置信息可以承载在DCI上，又或者第二配置信息还可以承载在物理层控制信道上。具体第二配置信息的承载形式可参照第一配置信息的承载形式，在此不再赘述。
例如，在第一节点为上述通信系统100中的主节点111，第二节点为从节点112的情况下，通过上述设计，可以实现在从节点向主节点发送数据时，由主节点来控制从节点是否允许对第一逻辑信道中的数据包分段的效果。
可选的，所述第二配置信息可以是与第一逻辑信道对应的第一协议实体的配置信息；
可选的，所述第二配置信息包含第一模式信息，第一模式信息用于指示第二节点以第一模式工作，以及不允许对第一逻辑信道中的数据包进行分段。其中，第二节点可以有多个工作模式，多个工作模式中包括第一模式。当第二节点工作在第一模式下时，不允许对第一逻辑信道中的数据包进行分段。例如，所述第一模式可以为低时延传输模式，在低时延传输模式下工作时，由于分段的处理会带来更多的时延，因此第二节点不允许或者无法接受对所述第一逻辑信道中的数据包进行分段。也就是说，低时延传输模式的模式信息用于指示第二节点以相应模式工作的同时，也指示了不允许对第一逻辑信道中的数据包进行分段。本申请不对工作模式的种类做具体限定，这里仅涉及不同模式的模式信息可以用于指示是否允许分段。
可选的，与S201类似，逻辑信道中的数据可以是对应于第一协议实体中的SDU或者是业务数据，在此不再赘述。
在另一种可能的设计中，考虑到可以由第二节点根据第一逻辑信道的属性来确定是否允许对第一逻辑信道中的数据包进行分段，进而上述S202可以包括：
S202b、第二节点根据第一逻辑信道中的数据对应的服务质量(quality of service，QoS)信息或业务类型，确定第一逻辑信道对应的第一信息。其中，第一逻辑信道中的数据对应的服务质量信息或业务类型，具体可以是第一逻辑信道中的数据包中所封装的业务数据的服务质量信息或业务类型，也可以是第一逻辑信道中的数据包(SDU 或PDU)的服务质量信息或业务类型，对此本申请可以不做限制。
需要说明的是，QoS信息或业务类型只是一种示例，本申请不限制仅根据QoS信息或业务类型确定所述第一信息，第二节点可以根据所述第一逻辑信道或者所述第一逻辑信道中的数据的任何一种或多种信息确定所述第一信息。可替代的，上述服务质量信息或业务类型也可以看作是所述第一信息。即，获取第一逻辑信道对应的第一信息，可以理解为获取第一逻辑信道对应的服务质量信息或业务类型，所述第一逻辑信道对应的服务质量信息或业务类型用于指示是否允许对所述第一逻辑信道中的数据包分段。
例如，若第一逻辑信道中的数据对应的QoS信息反映出第一逻辑信道中的数据包不适合分段，则确定第一信息指示不允许对第一逻辑信道中的数据包分段；若第一逻辑信道对应的QoS信息反映出第一逻辑信道中的数据包可以分段，则确定第一信息指示允许对第一逻辑信道中的数据包分段。这样一来，第一逻辑信道中的数据包的发送方式与第一逻辑信道对应的服务质量QoS信息相匹配。同样的，根据第一逻辑信道对应的业务类型，确定第一逻辑信道对应的第一信息，也可以达到类似效果。
可选的，不允许进行数据包分段的数据的Qos信息可以是协议约定的；其中所述QoS信息用于指示逻辑信道中的数据的QoS需求或要求。示例性的，QoS需求或要求可以包括但是不限于数据的优先级(priority)、数据的可靠性(reliability)、数据的传输速率(data rate)、数据的传输时延(latency)、数据的通信距离(range)中的一项或者多项。可选地，QoS信息可以是QoS分级索引QCI，或者QoS流标识(Qos flow ID)，本申请实施例对此不进行限制。可选地，QCI或Qos flow ID与相应的Qos需求或要求之间的对应关系可以是协议约定的。
可选的，不允许进行数据包分段的数据的业务类型信息可以是协议约定的。业务类型信息用于指示逻辑信道中的数据的业务类型。可选地，业务类型可以通过应用标识(application ID，AID)来区分。例如主动降噪业务的AID为1，视频业务的AID为2。例如，主动降噪业务不允许进行分段。再例如，专用RRC信令不允许进行分段。
S203、第二节点通过第一时频资源向第一节点发送第一数据。
具体的，第二节点在确定需要通过第一时频资源发送的数据后，便可以通过第一时频资源向第一节点发送数据，即第一数据。
以第一数据为MAC PDU为例，所述MAC PDU包含至少一个MAC SDU。其中单个MAC SDU可以包含一个逻辑信道中的一个或者多个数据。因此，第一逻辑信道所对应的第二时频资源，可以包括用于第一逻辑信道中的至少一个数据的时频资源。例如，第一数据中包括第一逻辑信道中的数据包的情况下，第一逻辑信道中的数据包(RLC SDU)会被封装成RLC PDU(也称为MAC SDU)中(例如MAC SDU1)。进一步，MAC SDU1在传输过程中会承载在第二时频资源中。一种实现中，第二时频资源是否足以承载所述第一逻辑信道中的数据包，不能仅考虑RLC SDU的大小，而是要考虑对RLC SDU进行处理后生成的RLC PDU的大小。又一种实现中，第二时频资源是否足以承载所述第一逻辑信道中的数据包，可以仅考虑RLC SDU的大小，无需考虑对RLC SDU进行处理后生成的RLC PDU的大小。具体实现方式可以取决于具体的通信场景或者协议约定。下文针对时频资源是否足以承载数据包的阐述可以参考本 段。
需要说明的是，第一逻辑信道对应的MAC SDU可以是一个，也可以多个，本发明不对此进行限制。
可选的，第一逻辑信道对应的MAC SDU的子包头中携带有逻辑信道标识(logical channel identifier，LCID)或者QoS类标识(QoS class Identifier，QCI)，用于将第一逻辑信道对应的MAC SDU与其他逻辑信道对应的MAC SDU进行区分。
当第一数据为MAC PDU时，在一种示例中，第一数据中MAC SDU的子包头可以位于第一数据的包头。
例如，当第一数据为MAC PDU时，图3A示出一种第一数据的帧结构。其中，第一数据可以包括MAC包头(MAC header)、MAC控制元素(MAC control element)、MAC SDU以及填充域(padding)。其中，MAC SDU的子包头(sub-header)位于MAC包头位置。
在另一种示例中，第一数据中MAC SDU的子包头可以与MAC SDU间隔排列。
例如，图3B示出另一种第一数据的帧结构。其中，各MAC SDU的子包头位于对应MAC SDU之前。
可选的，图3B示出的帧结构中也可以包括MAC控制元素和/或填充域。
可选的，图3B示出的帧结构中也可以包含MAC CE对应的子头。
可选的，图3B示出的帧结构中也可以包含填充域对应的子头。
需要说明的是，当第一数据为MAC PDU时，本申请对于第一数据中各MAC SDU的子包头的位置可以不做限制。
另外，在第一数据为MAC PDU，并且MAC PDU只对应一个逻辑信道的情况下，第一逻辑信道所对应的第二时频资源也可以是MAC PDU的可用资源。
需要说明的是，在一些实施例中，第二节点也可以不通过第一时频资源向第一节点发送数据。
例如，当第一时频资源仅用于承载第一逻辑信道中的数据，并且第一信息指示不允许对第一逻辑信道中的数据包进行分段，并且在不对第一逻辑信道中的数据包进行分段的情况下无法将第一逻辑信道中的数据包承载在第一时频资源中时，则第二节点可以不通过第一时频资源向第一节点发送数据。
例如，当第一时频资源仅用于承载第一逻辑信道中的数据，并且第一时频资源中的可用资源所能够承载的数据量的最大值为1MB，第一逻辑信道中最小的数据包的大小已经超出1MB，并且不允许对第一逻辑信道中的数据包进行分段，则第二节点可以不通过第一时频资源向第一节点发送数据。
再例如，当第一时频资源用于承载多个逻辑信道中的数据时，若第一时频资源中所承载的多个逻辑信道(多个逻辑信道中包括第一逻辑信道)中各逻辑信道都按照上述方案确定不允许对逻辑信道中的数据包进行分段，并且在不对逻辑信道中的数据包进行分段的情况下无法将这些逻辑信道中的数据包承载在第一时频资源中时，第二节点可以不通过第一时频资源向第一节点发送数据。
一种实现中，在确定所述第一时频资源是否足以承载第一逻辑信道中的数据包时，将数据包的包头信息的大小考虑在内。例如，当第一逻辑信道对应第一RLC实体时， 在确定所述第一时频资源能否承载第一逻辑信道中的数据包时，考虑RLC PDU的大小。
又一种实现中，在确定所述第一时频资源是否足以承载第一逻辑信道中的数据包时，不将数据包的包头信息的大小考虑在内，例如透传模式或者其他可能的场景。例如，当第一逻辑信道对应第一RLC实体时，在确定所述第一时频资源能否承载第一逻辑信道中的数据包时，考虑RLC SDU的大小。
因此，当第二节点可以不通过第一时频资源向第一节点发送数据时，本申请所提供技术方案中也可以不执行上述S203的内容。
在一种可能的设计中，考虑到在第一信息指示不允许对第一逻辑信道中的数据包分段的情况下，可以通过一些方式来判断第二时频资源的大小是否足以承载第一逻辑信道中的所有数据包，若确定第二时频资源的大小不足以承载第一逻辑信道中的所有数据包，则不通过第二时频资发送第一逻辑信道中的数据包(第一数据不包含第一逻辑信道中的数据包)的这一方式，来避免对第一逻辑信道中的数据包进行分段。
也就是说，本申请实施例所提供的上述方法，具体可以包括：
S301、第二节点接收来自第一节点的第一配置信息。其中，第一配置信息用于配置第一时频资源。
S302、第二节点获取第一逻辑信道对应的第一信息。
其中，第一信息用于指示是否允许对第一逻辑信道中的数据包分段，具体的，第一信息用于指示不允许对第一逻辑信道中的数据包分段。
第一逻辑信道对应第二时频资源，第二时频资源包含于第一时频资源，第二时频资源的大小不足以承载第一逻辑信道中的所有数据包。
S303、第二节点通过第一时频资源向第一节点发送第一数据。
其中，第一数据不包含第一逻辑信道中的数据包。
其中，S301-S303与S201-S203在实现方式上的相同内容，可参照上述S201-S203的相应描述，在此不再赘述。
也就是说，考虑到第一逻辑信道的下层协议栈实体，通常无法获取第一逻辑信道中的各个数据包的大小，只能获取到第一逻辑信道中所有数据包的总大小。因此为了避免将部分数据包发送时，出现分段的情况，上述设计中当第一信息指示不允许对第一逻辑信道中的数据包分段，并且确定第二时频资源的大小不足以承载第一逻辑信道中的所有数据包时，则通过使第一数据不包含第一逻辑信道中的数据包，可以避免对第一逻辑信道中的数据包进行分段。
在另一种可能的设计中，考虑到在第一信息指示不允许对第一逻辑信道中的数据包分段的情况下：可以通过一些方式来判断第二时频资源的大小是否足以承载第一逻辑信道中任一数据包，若确定第二时频资源的大小不足以承载第一逻辑信道中任一数据包，则不通过第二时频资发送第一逻辑信道中的数据包的这一方式，来避免对第一逻辑信道中的数据包进行分段。或者，在第一逻辑信道中的数据包对应有发送顺序的情况下，可以通过一些方式来判断第二时频资源的大小是否足以承载第一逻辑信道中第一个数据包(即，第一个待发送数据包)，若确定第二时频资源的大小不足以承载第一逻辑信道中第一个数据包，则不通过第二时频资发送第一逻辑信道中的数据包的 这一方式，来避免对第一逻辑信道中的数据包进行分段。同上文所述，确定第二时频资源的大小是否足以承载第一逻辑信道中的任一数据包或者第一个数据包时，可以考虑所述第一逻辑信道对应的协议栈实体的PDU大小，或者，也可以考虑所述第一逻辑信道对应的协议栈实体的SDU大小。具体取决于通信场景或者协议约定。
本申请实施例所提供的上述方法，具体可以包括：
S401、第二节点接收来自第一节点的第一配置信息。其中，第一配置信息用于配置第一时频资源。
S402、第二节点获取第一逻辑信道对应的第一信息。
其中，第一信息用于指示是否允许对第一逻辑信道中的数据包分段，具体的，第一信息用于指示不允许对第一逻辑信道中的数据包分段。
第一逻辑信道对应第二时频资源，第二时频资源包含于第一时频资源，第二时频资源的大小不足以承载第一逻辑信道中的任一数据包或者第一个数据包。
S403、第二节点通过第一时频资源向第一节点发送第一数据。
其中，第一数据不包含第一逻辑信道中的数据包。
其中，S401-S403与S201-S203在实现方式上的相同内容，可参照上述S201-S203的相应描述，在此不再赘述。
在上述设计中，当第一信息指示不允许对第一逻辑信道中的数据包分段，并且第二时频资源的大小不足以承载第一逻辑信道中的任一数据包或者第一个数据包时，则通过使第一数据不包含第一逻辑信道中的数据包，就可以避免对第一逻辑信道中的数据包进行分段。
在又一种可能的设计中，考虑到在第二节点向第一节点发送第一数据时，第二时频资源中承载了第一逻辑信道中的哪些数据包，一方面会受到第一信息所指示的内容的影响，另一方面还受到第二时频资源大小的影响。也就是说，在第二节点向第一节点发送第一数据时，第二时频资源中承载了第一逻辑信道中的哪些数据包，具体可以是根据第一信息和第二时频资源中的至少一个来确定。
也就是说，可以根据所述第一信息或所述第二时频资源的大小中至少一个，通过所述第二时频资源向所述第一节点发送所述第一逻辑信道中的至少一个数据包。
因此，本申请实施例所提供的上述方法，具体可以包括：
S501、第二节点接收来自第一节点的第一配置信息。其中，第一配置信息用于配置第一时频资源。
S502、第二节点获取第一逻辑信道对应的第一信息。
其中，第一信息用于指示是否允许对第一逻辑信道中的数据包分段。
第一逻辑信道对应第二时频资源，第二时频资源包含于第一时频资源。
S503、第二节点通过第一时频资源向第一节点发送第一数据。
其中，第一数据中包含第一逻辑信道中的至少一个数据包。
其中，根据第一信息或第二时频资源的大小中至少一个，通过第二时频资源向第一节点发送第一逻辑信道中的至少一个数据包。
其中，S501-S503与S201-S203在实现方式上的相同内容，可参照上述S201-S203的相应描述，在此不再赘述。
在一种实现方式中，考虑到在确定第二时频资源的大小足以承载第一逻辑信道中的所有数据包的情况下，不用考虑第一信息指示的内容，便可以使第一数据中包含第一逻辑信道中的所有数据包，以将第一逻辑信道中的数据包进行发送。
因此，本申请实施例所提供的上述方法，具体可以包括：
S601、第二节点接收来自第一节点的第一配置信息。其中，第一配置信息用于配置第一时频资源。
S602、第二节点获取第一逻辑信道对应的第一信息。
其中，第一信息用于指示是否允许对第一逻辑信道中的数据包分段。
第一逻辑信道对应第二时频资源，第二时频资源包含于第一时频资源，第二时频资源的大小足以承载第一逻辑信道中的所有数据包。
S603、第二节点通过第一时频资源向第一节点发送第一数据。
第一数据中包含第一逻辑信道中的所有数据包。
其中，S601-S603与S201-S203在实现方式上的相同内容，可参照上述S201-S203的相应描述，在此不再赘述。
也就是说，在上述设计中，在第二时频资源的大小足以承载第一逻辑信道中的所有数据包的情况下，无论第一信息指示允许还是不允许对第一逻辑信道中的数据包分段，此时都将第一逻辑信道中的所有数据包承载在第二时频资源中。基于上述设计，可以在第二时频资源的大小足以承载第一逻辑信道中的所有数据包的情况下，简化第一节点的处理过程，即可以在不对第一信息进行读取的情况下，将第一逻辑信道中的所有数据包进行发送。
在另一种实现方式中，在根据第一信息或第二时频资源的大小中至少一个，通过第二时频资源向第一节点发送第一逻辑信道中的至少一个数据包时，考虑到在第一信息用于指示不允许对第一逻辑信道中的数据包分段的情况下，若第二时频资源的大小不足以承载第一逻辑信道中的所有数据包，但是第二时频资源的大小足以承载第一逻辑信道中的至少一个数据包，则可以通过使第一数据中包含第一逻辑信道中的至少一个数据包的这一方式来传输数据。
因此，本申请实施例所提供的上述方法，具体可以包括：
S701、第二节点接收来自第一节点的第一配置信息。其中，第一配置信息用于配置第一时频资源。
S702、第二节点获取第一逻辑信道对应的第一信息。
其中，第一信息用于指示是否允许对第一逻辑信道中的数据包分段。一种实现中，第一信息用于指示不允许对第一逻辑信道中的数据包分段。
第一逻辑信道对应第二时频资源，第二时频资源包含于第一时频资源，第二时频资源的大小不足以承载第一逻辑信道中的所有数据包并且第二时频资源的大小足以承载第一逻辑信道中的至少一个数据包。
在一种实现方式中，第一逻辑信道中的至少一个数据包，具体可以是第一逻辑信道中发送顺序最前的至少一个数据包。
S703、第二节点通过第一时频资源向第一节点发送第一数据。
其中，第一数据中包含第一逻辑信道中的至少一个数据包。
其中，S701-S703与S201-S203在实现方式上的相同内容，可参照上述S201-S203的相应描述，在此不再赘述。
也就是说，上述设计中，在第一信息用于指示不允许对第一逻辑信道中的数据包分段的情况下，若第二时频资源的大小不足以承载第一逻辑信道中的所有数据包，但是第二时频资源的大小足以承载第一逻辑信道中的至少一个数据包，则可以通过使第一数据中包含第一逻辑信道中的至少一个数据包的这一方式来传输数据。
在一种可能的设计中，考虑到第一时频资源可以对应多个逻辑信道。因此，通过第一时频资源发送的第一数据中，还可以包括除第一逻辑信道之外的其他逻辑信道中的至少一个数据包。进而，本申请上述方法中：第一数据中包含第二逻辑信道中的至少一个数据包。
例如，第一数据为MAC PDU时，则第二逻辑信道中的至少一个数据包可以封装在MAC PDU中的一个或多个MAC SDU中。
在一种实现方式中，本申请实施例所提供的方法可以包括：上述第二逻辑信道的优先级低于第一逻辑信道的优先级。
本申请实施例所提供数据传输方法，通过设置第一逻辑信道对应的第一信息，可以在发送第一逻辑信道中的数据包时，控制是否允许对第一逻辑信道中的数据包进行分段。进一步的，当第一逻辑信道用于传输小包时，可以通过使第一信息指示不允许对第一逻辑信道中的数据包进行分段，从而避免对小包进行分段，进而提高时频资源中有效负载的占比，降低系统开销和处理时延。
在另一种实施例中，本申请实施例还提供一种通信方法，该方法可以用于上述通信系统100中以在节点之间建立连接，具体的该方法可以用于上述实施例中在第一节点与第二节点之间建立连接。以下以在第一节点与第二节点之间建立连接为例，对该通信方法进行介绍，如图6所示，该方法包括：
S801、第二节点接收来自第一节点的第一系统广播消息。
其中，第一系统广播消息中包括第一节点的身份信息。
可选的，该第一身份信息可以理解为能够在该第一节点所在通信域内唯一标识该第一节点身份的信息。
具体的，第一节点的身份信息可以为第一节点的设备标识、媒体访问控制(media access control，MAC)地址、软地址、短地址中的至少一项。
需要说明的是，设备标识是指能够唯一标识第一节点的一串数字或一个序列号。例如：国际移动设备识别码(international mobile equipment identification number，IMEI)或移动设备标识(mobile equipment identifier，MEID)。
还需要说明的是，MAC地址是指在媒体接入层上使用的地址，也叫物理地址或硬件地址。
还需要说明的是，软地址可以为该在通信域中能够唯一识别该第一节点的地址或标识(ID)。
还需要说明的是，短地址可以为根据上述设备标识、MAC地址、软地址中的至少一个的一部分得到的地址或标识。
S802、第二节点在确定第一节点的身份信息与预设身份信息一致后，向第一节点 发送接入请求。
本申请实施例所提供通信方法，在第二节点向第一节点发送接入请求之前，先由第二节点对第一节点的身份信息进行验证，在验证成功后再向第一节点发送接入请求。从而避免第二节点向错误的节点发送接入请求。例如，当第二节点为座舱域中的车载或非车载设备，第一节点为CDC时，可以避免第二节点与外界其他车辆上的CDC建立连接。
在另一种实施例中，本申请实施例还提供一种通信方法，该方法可以用于上述通信系统100中以在节点之间建立连接，具体的该方法可以用于上述实施例中在第一节点与第二节点之间建立连接。以下以在第一节点与第二节点之间建立连接为例，对该通信方法进行介绍，如图7所示，该方法包括：
S901、第二节点接收来自第一节点的接入资源配置信息。
其中，所述接入资源配置信息用于配置用于与所述第一节点建立连接(也称为接入)的接入资源。所述接入资源可以包括至少一个时频资源。
可选的，所述接入资源配置信息还包含所述接入资源对应的接入方式的信息，例如通过1比特来指示接入方式，或者说所述接入资源配置信息还用于指示所述接入资源对应的接入方式。示例性的，所述接入方式可以为竞争接入或非竞争接入中的至少一种。
一种实现中，所述接入资源配置信息用于指示竞争接入，所述接入资源包括的至少一个时频资源用于多个第二节点竞争接入。
例如，在接入资源配置信息用于指示竞争接入，接入资源包括的至少一个时频资源的情况下，第二节点在接收到该接入资源配置信息后，可以按照竞争接入的方式，通过至少一个时频资源向第一节点发送接入请求。
又一种实现中，所述接入资源配置信息用于指示非竞争接入，所述第二节点通过所述接入资源发送接入请求。可选的，所述第二节点可以通过所述接入资源中的部分资源发送接入请求。
例如，在接入资源配置信息用于指示非竞争接入，第二节点在接收到该接入资源配置信息后，则第二节点在接收到该接入资源配置信息后，可以按照非竞争接入的方法，利用接入资源中包括的时频资源向第一节点发送接入请求。
再一种实现中，所述接入资源配置信息用于指示非竞争接入以及竞争接入，所述接入资源包含至少两个时频资源，所述至少两个时频资源包含用于非竞争接入的视频资源以及用于竞争接入的时频资源。
可以理解的，对于竞争接入，顾名思义，即多个第二节点可能在相同的时频资源上向第一节点发送接入请求。对于非竞争接入，即多个第二节点在相互正交(不重叠)的时频资源上向第一节点发送接入请求。
可选的，所述接入资源配置信息可以是系统信息(System information)或者RRC信令。
S902、第二节点在配置的接入资源上向第一节点发送接入请求。
可选的，当所述接入方式为竞争接入时，第二节点随机从所述接入资源中选择第一资源，并在所述第一资源上向第一节点发送接入请求；
一种实现中，当所述接入资源为周期性资源时，第二节点可以随机选择一个时间单元，并通过所述时间单元对应的接入资源发送接入请求。其中，上述时间单元具体可以为符号、时隙、无线帧、超帧等时间单元。所述符号可以为正交频分复用OFDM符号。其中，一个超帧的时长可以为1ms，一个超帧可以包含多个无线帧，例如无线帧的数量也可以48个。可选的，一个无线帧可以包含多个符号，无线帧的长度可以为1/48kHz，约为20.83us。其中每个无线帧中包含的符号个数可以预先定义的。进一步，每个无线帧中的每个符号的传输方向可以由所述第一节点配置或者通知。具体的，无线帧可以在时域上依次包含第一时域资源、第一保护间隔GP、第二时域资源以及第二GP。进一步可选的，所述第一时域资源用于映射来自所述第一节点的信息或信号(下行方向)，所述第二时域资源用于映射向所述第一节点发送的信息或信号(上行方向)，所述第一GP和第二GP用于执行不同方向传输的转换，例如收发转换或者发收转换。
可选的，其中在所述第一资源上向第一节点发送接入请求可以包括在所述第一资源上向第一节点发送接入请求向第一节点发送第二节点的第二身份信息。
当所述接入方式为非竞争接入方式时，第二节点根据第二节点的第二身份信息从所述接入资源中确定第二资源，并在所述第二资源上向第一节点发送接入请求。可选的，所述在所述第二资源上向第一节点发送接入请求可以包括在所述第二资源上向第一节点发送第二节点的第三身份信息。可选的，该第三身份信息可以理解为能够在该第二节点所在通信域内唯一标识该第二节点身份的信息。
可选的，所述第二身份信息和第三身份信息可以相同或者不同。
可选的所述第二身份信息或第三身份信息可以为设备标识、媒体访问控制(media access control，MAC)地址、软地址、短地址中的至少一项。
需要说明的是，设备标识是指能够唯一标识所述设备的一串数字或一个序列号。例如：国际移动设备识别码(international mobile equipment identification number，IMEI)或移动设备标识(mobile equipment identifier，MEID)。
还需要说明的是，MAC地址是指在媒体接入层上使用的地址，也叫物理地址或硬件地址。
还需要说明的是，软地址可以为在通信域中能够唯一识别该节点的地址或标识。可选的，软地址可以是设备出厂时预配置的。
还需要说明的是，短地址可以为根据上述设备标识、MAC地址、软地址中的至少一个的一部分得到的地址或标识。
以上主要从设备之间交互的角度对本申请实施例提供的方案进行了介绍。应理解，上述终端设备或网络设备为了实现对应的功能，其包括了执行各功能相应的硬件结构和/或软件模块。本领域技术人员应该很容易意识到，结合本文中所公开的实施例描述的各示例的单元，本申请能够以硬件或硬件和计算机软件的结合形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
本申请实施例可以根据上述方法示例对设备(包括终端设备和网络设备)进行功能模块的划分，例如，可以对应各个功能划分各个功能模块，也可以将两个或两个以 上的功能集成在一个处理模块中。上述集成的模块既可以采用硬件的形式实现，也可以采用软件功能模块的形式实现。可选的，本申请实施例中对模块的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式。
如图8所示，为本申请实施例提供的一种数据传输装置200的组成示意图。该数据传输装置200可以是芯片或片上系统。该数据传输装置200可以用于执行上述实施例中涉及的第二节点的功能。作为一种可实现方式，该数据传输装置200包括：
接收单元2001，用于接收来自第一节点的第一配置信息，所述第一配置信息用于配置第一时频资源；
获取单元2002，用于获取第一逻辑信道对应的第一信息，所述第一信息用于指示是否允许对所述第一逻辑信道中的数据包分段；其中，所述第一逻辑信道对应第二时频资源，所述第二时频资源包含于所述第一时频资源；
发送单元2003，用于通过所述第一时频资源向所述第一节点发送第一数据。
可选的，所述第一数据不包含所述第一逻辑信道中的数据包；其中，所述第一信息用于指示不允许对所述第一逻辑信道中的数据包分段，并且所述第二时频资源的大小不足以承载所述第一逻辑信道中的所有数据包；或者，其中，所述第一信息用于指示不允许对所述第一逻辑信道中的数据包分段，并且所述第二时频资源的大小不足以承载所述第一逻辑信道中的任一数据包或者第一个数据包。
可选的，所述第一数据中包含所述第一逻辑信道中的至少一个数据包；
所述发送单元2003，具体用于根据所述第一信息或所述第二时频资源的大小中至少一个，通过所述第二时频资源发送所述至少一个数据包。
可选的，所述第一数据中包含所述第一逻辑信道中的所有数据包；其中，所述第二时频资源的大小足以承载所述第一逻辑信道中的所有数据包。
可选的，所述第一数据中包含所述第一逻辑信道中的至少一个数据包；
所述第一信息用于指示不允许对第一逻辑信道中的数据包分段，所述第二时频资源的大小不足以承载所述第一逻辑信道中的所有数据包并且所述第二时频资源的大小足以承载所述至少一个数据包。
可选的，所述第一逻辑信道对应于第一数据队列，所述第一逻辑信道中的数据包包含业务数据包，或者所述第一逻辑信道中的数据包包含控制信令。
可选的，所述第一逻辑信道对应于第一协议栈实体，第一逻辑信道中的数据包为第一协议栈实体中的服务数据单元。
可选的，所述获取单元2002，用于接收来自所述第一节点的第二配置信息，所述第二配置信息用于配置所述第一逻辑信道对应的所述第一信息。
可选的，所述获取单元2002，用于根据所述第一逻辑信道中的数据对应的服务质量QoS信息或业务类型，确定所述第一逻辑信道对应的所述第一信息。
可选的，所述第一数据中包含第二逻辑信道中的至少一个数据包。
需要说明的是，上述方法实施例涉及的各步骤的所有相关内容均可以援引到对应功能模块的功能描述，在此不再赘述。本申请实施例提供的数据传输装置200，用于执行上述数据传输方法中第二节点的功能，从而达到与上述数据传输方法相同的效果。
如图9所示，为本申请实施例提供的一种数据传输装置300的组成示意图。该数 据传输装置300可以是芯片或片上系统。该数据传输装置300可以用于执行上述实施例中涉及的第一节点的功能。作为一种可实现方式，该数据传输装置300包括：
发送单元3001，用于向第二节点发送第一配置信息；所述配置信息用于配置第一时频资源；
所述发送单元3001，还用于第二配置信息；所述第二配置信息用于指示是否允许对第一逻辑信道中的数据包分段；所述第一逻辑信道对应第二时频资源，所述第二时频资源包含于所述第一时频资源；
接收单元3002，用于通过所述第一时频资源接收来自所述第二节点的第一数据。
可选的，第一逻辑信道对应于第一数据队列，所述第一逻辑信道中的数据包包含业务数据包，或者所述第一逻辑信道中的数据包包含控制信令。
可选的，所述第一逻辑信道对应于第一协议栈实体，第一逻辑信道中的数据包为第一协议栈实体中的服务数据单元SDU。基于上述设计，可以通过第一信息，指示是否允许对第一协议栈实体中的服务数据单元进行分段。
需要说明的是，上述方法实施例涉及的各步骤的所有相关内容均可以援引到对应功能模块的功能描述，在此不再赘述。本申请实施例提供的数据传输装置200，用于执行上述数据传输方法中第一节点的功能，从而达到与上述数据传输方法相同的效果。
如图10所示，为本申请实施例提供的一种数据传输装置400的组成示意图。该数据传输装置400可以是芯片或片上系统。该数据传输装置400可以用于执行上述实施例中涉及的第二节点的功能。作为一种可实现方式，该数据传输装置400包括：
接收单元4001，用于接收来自第一节点的第一系统广播消息。其中，第一系统广播消息中包括第一节点的身份信息。
发送单元4002，在确定第一节点的身份信息与预设身份信息一致后，向第一节点发送接入请求。
可选的，第一节点的身份信息可以为第一节点的设备标识、媒体访问控制(media access control，MAC)地址、软地址、短地址中的至少一项。
如图11所示，为本申请实施例提供的一种数据传输装置500的组成示意图。该数据传输装置500可以是芯片或片上系统。该数据传输装置500可以用于执行上述实施例中涉及的第一节点的功能。作为一种可实现方式，该数据传输装置500包括：
发送单元5001，向第二节点发送第一系统广播消息。其中，第一系统广播消息中包括第一节点的身份信息。
接收单元5002，接收来自第二节点的接入请求。
在一种可能的设计中，第一节点的身份信息可以为第一节点的设备标识、媒体访问控制(media access control，MAC)地址、软地址、短地址中的至少一项。
如图12所示，为本申请实施例提供的一种数据传输装置600的组成示意图。该数据传输装置600可以是芯片或片上系统。该数据传输装置600可以用于执行上述实施例中涉及的第二节点的功能。作为一种可实现方式，该数据传输装置600包括：
接收单元6001，用于接收来自第一节点的接入资源配置信息。其中，所述接入资源配置信息用于配置用于与所述第一节点建立连接(也称为接入)的接入资源。
发送单元6002，用于第二节点在配置的接入资源上向第一节点发送接入请求。
在一种可能的设计中，所述接入资源配置信息还包含所述接入资源对应的接入方式的信息，或者说所述接入资源配置信息还用于指示所述接入资源对应的接入方式。
在一种可能的设计中，所述接入资源配置信息可以是系统消息(System information)或者RRC信令。
在一种可能的设计中，所述发送单元6002，具体用于随机从所述接入资源中选择第一资源，并在所述第一资源上向第一节点发送接入请求。
在一种可能的设计中，其中所述发送单元6002，具体用于在所述第一资源上向第一节点发送接入请求向第一节点发送第二节点的第二身份信息。
在一种可能的设计中，所述发送单元6002，具体用于根据第二节点的第二身份信息从所述接入资源中确定第二资源，并在所述第二资源上向第一节点发送接入请求。
在一种可能的设计中，所述发送单元6002，具体用于在所述第二资源上向第一节点发送第二节点的第三身份信息。
在一种可能的设计中，所述第二身份信息和第三身份信息可以相同或者不同，所述第二身份信息或第三身份信息可以为设备标识、媒体访问控制(media access control，MAC)地址、软地址、短地址中的至少一项。
如图13所示，为本申请实施例提供的一种数据传输装置700的组成示意图。该数据传输装置700可以是芯片或片上系统。该数据传输装置700可以用于执行上述实施例中涉及的第一节点的功能。作为一种可实现方式，该数据传输装置700包括：
发送单元7001，用于向第二节点发送接入资源配置信息。其中，所述接入资源配置信息用于配置用于与所述第一节点建立连接(也称为接入)的接入资源。
接收单元7002，用于第一节点通过该接入资源接收来自第二节点的接入请求。
在一种可能的设计中，所述接入资源配置信息还包含所述接入资源对应的接入方式的信息，或者说所述接入资源配置信息还用于指示所述接入资源对应的接入方式。
在一种可能的设计中，所述接入资源配置信息可以是系统消息(System information)或者RRC信令。
如图14所示，为本申请实施例提供的一种数据传输装置800的组成示意图，该数据传输装置可以用于实现上述数据传输方法或通信方法中第一节点或者第二节点的功能。该数据传输装置800可以包括处理器810，外部存储器接口820，内部存储器821，通用串行总线(universal serial bus，USB)接口830，充电管理模块840，电源管理模块841，电池842，天线1，天线2，移动通信模块850，无线通信模块860，音频模块870，扬声器870A，受话器870B，麦克风870C，耳机接口870D，传感器模块880，按键890，马达891，指示器892，摄像头893，显示屏894，以及用户标识模块(subscriber identification module，SIM)卡接口895等中的至少一个。
可以理解的是，本申请实施例示意的结构并不构成对数据传输装置800的具体限定。在本申请另一些实施例中，数据传输装置800可以包括比图示更多或更少的部件，或者组合某些部件，或者拆分某些部件，或者不同的部件布置。图示的部件可以以硬件，软件或软件和硬件的组合实现。
处理器810可以包括一个或多个处理单元，例如：处理器810可以包括应用处理器(application processor，AP)、调制解调处理器、图形处理器(graphics processing unit， GPU)、图像信号处理器(image signal processor，ISP)、控制器、视频编解码器、数字信号处理器(digital signal processor，DSP)、专用集成电路(application specific integrated circuit，ASIC)、现场可编程门阵列(field-programmable gate array，FPGA)、基带处理器，和/或神经网络处理器(neural-network processing unit，NPU)等。其中，不同的处理单元可以是独立的部件，也可以集成在一个或多个处理器中。在一些实施例中，数据传输装置800也可以包括一个或多个处理器810。其中，控制器可以根据指令操作码和时序信号，产生操作控制信号，完成取指令和执行指令的控制。在其他一些实施例中，处理器810中还可以设置存储器，用于存储指令和数据。示例性地，处理器810中的存储器可以为高速缓冲存储器。该存储器可以保存处理器810刚用过或循环使用的指令或数据。如果处理器810需要再次使用该指令或数据，可从所述存储器中直接调用。这样就避免了重复存取，减少了处理器810的等待时间，因而提高了数据传输装置800处理数据或执行指令的效率。
在一些实施例中，处理器810可以包括一个或多个接口。接口可以包括集成电路间(inter-integrated circuit，I2C)接口，集成电路间音频(inter-integrated circuit sound，I2S)接口，脉冲编码调制(pulse code modulation，PCM)接口，通用异步收发传输器(universal asynchronous receiver/transmitter，UART)接口，移动产业处理器接口(mobile industry processor interface，MIPI)，通用输入输出(general-purpose input/output，GPIO)接口，SIM卡接口，和/或USB接口等。其中，USB接口830是符合USB标准规范的接口，具体可以是Mini USB接口，Micro USB接口，USB Type C接口等。USB接口830可以用于连接充电器为数据传输装置800充电，也可以用于数据传输装置800与外围设备之间传输数据。该USB接口830也可以用于连接耳机，通过耳机播放音频。
可以理解的是，本申请实施例示意的各模块间的接口连接关系，只是示意性说明，并不构成对数据传输装置800的结构限定。在本申请另一些实施例中，数据传输装置800也可以采用上述实施例中不同的接口连接方式，或多种接口连接方式的组合。
充电管理模块840用于从充电器接收充电输入。其中，充电器可以是无线充电器，也可以是有线充电器。在一些有线充电的实施例中，充电管理模块840可以通过USB接口830接收有线充电器的充电输入。在一些无线充电的实施例中，充电管理模块840可以通过数据传输装置800的无线充电线圈接收无线充电输入。充电管理模块840为电池842充电的同时，还可以通过电源管理模块841为终端供电。
电源管理模块841用于连接电池842，充电管理模块840与处理器810。电源管理模块841接收电池842和/或充电管理模块840的输入，为处理器810，内部存储器821，外部存储器，显示屏894，摄像头893，和无线通信模块860等供电。电源管理模块841还可以用于监测电池容量，电池循环次数，电池健康状态(漏电，阻抗)等参数。在其他一些实施例中，电源管理模块841也可以设置于处理器810中。在另一些实施例中，电源管理模块841和充电管理模块840也可以设置于同一个器件中。
数据传输装置800的无线通信功能可以通过天线1，天线2，移动通信模块850，无线通信模块860，调制解调处理器以及基带处理器等实现。
天线1和天线2用于发射和接收电磁波信号。数据传输装置800中的每个天线可用于覆盖单个或多个通信频带。不同的天线还可以复用，以提高天线的利用率。例如： 可以将天线1复用为无线局域网的分集天线。在另外一些实施例中，天线可以和调谐开关结合使用。
移动通信模块850可以提供应用在数据传输装置800上的包括2G/3G/4G/5G等无线通信的解决方案。移动通信模块850可以包括至少一个滤波器，开关，功率放大器，低噪声放大器(low noise amplifier，LNA)等。移动通信模块850可以由天线1接收电磁波，并对接收的电磁波进行滤波，放大等处理，传送至调制解调处理器进行解调。移动通信模块850还可以对经调制解调处理器调制后的信号放大，经天线1转为电磁波辐射出去。在一些实施例中，移动通信模块850的至少部分功能模块可以被设置于处理器810中。在一些实施例中，移动通信模块850的至少部分功能模块可以与处理器810的至少部分模块被设置在同一个器件中。
无线通信模块860可以提供应用在数据传输装置800上的包括无线局域网(wirelesslocal area networks，WLAN)(如无线保真(wireless fidelity，Wi-Fi)网络)，蓝牙(bluetooth，BT)，全球导航卫星系统(global navigation satellite system，GNSS)，调频(frequency modulation，FM)，近距离无线通信技术(near field communication，NFC)，红外技术(infrared，IR)或者其它可能的通用传输技术等无线通信的解决方案。
可选地，无线通信模块860可以是集成至少一个通信处理模块的一个或多个器件，其中，一个通信处理模块可以对应于一个网络接口，该网络接口可以设置在不同的业务功能模式，设置在不同模式下的网络接口可以建立与该模式对应的网络连接。
例如：通过P2P功能模式下的网络接口可以建立支持P2P功能的网络连接，通过STA功能模式下的网络接口可以建立支持STA功能的网络连接，通过AP模式下的网络接口可以建立支持AP功能的网络连接。
无线通信模块860经由天线2接收电磁波，将电磁波信号调频以及滤波处理，将处理后的信号发送到处理器810。无线通信模块860还可以从处理器810接收待发送的信号，对其进行调频，放大，经天线2转为电磁波辐射出去。
数据传输装置800通过GPU，显示屏894，以及应用处理器等实现显示功能。GPU为图像处理的微处理器，连接显示屏894和应用处理器。GPU用于执行数学和几何计算，用于图形渲染。处理器810可包括一个或多个GPU，其执行程序指令以生成或改变显示信息。
显示屏894用于显示图像，视频等。显示屏894包括显示面板。显示面板可以采用液晶显示屏(liquid crystal display，LCD)，有机发光二极管(organic light-emittingdiode，OLED)，有源矩阵有机发光二极体或主动矩阵有机发光二极体(active-matrixorganic light emitting diode的，AMOLED)，柔性发光二极管(flex light-emittingdiode，FLED)，Miniled，MicroLed，Micro-oLed，量子点发光二极管(quantum dot lightemitting diodes，QLED)等。在一些实施例中，数据传输装置800可以包括1个或多个显示屏894。
在本申请的一些实施例中，当显示面板采用OLED、AMOLED、FLED等材料时，上述图14中的显示屏894可以被弯折。这里，上述显示屏894可以被弯折是指显示屏可以在任意部位被弯折到任意角度，并可以在该角度保持，例如，显示屏894可以从中部左右对折。也可以从中部上下对折。本申请中，将可以被弯折的显示屏称为可折叠显示屏。其中，该触摸显示屏可以是一块屏幕，也可以是多块屏幕拼凑在一起组合 成的显示屏，在此不做限定。
数据传输装置800的显示屏894可以是一种柔性屏，目前，柔性屏以其独特的特性和巨大的潜力而备受关注。柔性屏相对于传统屏幕而言，具有柔韧性强和可弯曲的特点，可以给用户提供基于可弯折特性的新交互方式，可以满足用户对于终端的更多需求。对于配置有可折叠显示屏的数据传输装置而言，数据传输装置上的可折叠显示屏可以随时在折叠形态下的小屏和展开形态下大屏之间切换。因此，用户在配置有可折叠显示屏的数据传输装置上使用分屏功能，也越来越频繁。
数据传输装置800可以通过ISP，摄像头893，视频编解码器，GPU，显示屏894以及应用处理器等实现拍摄功能。
ISP用于处理摄像头893反馈的数据。例如，拍照时，打开快门，光线通过镜头被传递到摄像头感光元件上，光信号转换为电信号，摄像头感光元件将所述电信号传递给ISP处理，转化为肉眼可见的图像。ISP还可以对图像的噪点，亮度，肤色进行算法优化。ISP还可以对拍摄场景的曝光，色温等参数优化。在一些实施例中，ISP可以设置在摄像头893中。
摄像头893用于捕获静态图像或视频。物体通过镜头生成光学图像投射到感光元件。感光元件可以是电荷耦合器件(charge coupled device，CCD)或互补金属氧化物半导体(complementary metal-oxide-semiconductor，CMOS)光电晶体管。感光元件把光信号转换成电信号，之后将电信号传递给ISP转换成数字图像信号。ISP将数字图像信号输出到DSP加工处理。DSP将数字图像信号转换成标准的RGB，YUV等格式的图像信号。在一些实施例中，数据传输装置800可以包括1个或多个摄像头893。
数字信号处理器用于处理数字信号，除了可以处理数字图像信号，还可以处理其他数字信号。例如，当数据传输装置800在频点选择时，数字信号处理器用于对频点能量进行傅里叶变换等。
视频编解码器用于对数字视频压缩或解压缩。数据传输装置800可以支持一种或多种视频编解码器。这样，数据传输装置800可以播放或录制多种编码格式的视频，例如：动态图像专家组(moving picture experts group，MPEG)1，MPEG2，MPEG3，MPEG4等。
NPU为神经网络(neural-network，NN)计算处理器，通过借鉴生物神经网络结构，例如借鉴人脑神经元之间传递业务功能，对输入信息快速处理，还可以不断的自学习。通过NPU可以实现数据传输装置800的智能认知等应用，例如：图像识别，人脸识别，语音识别，文本理解等。
外部存储器接口820可以用于连接外部存储卡，例如Micro SD卡，实现扩展数据传输装置800的存储能力。外部存储卡通过外部存储器接口820与处理器810通信，实现数据存储功能。例如将音乐，视频等文件保存在外部存储卡中。
内部存储器821可以用于存储一个或多个计算机程序，该一个或多个计算机程序包括指令。处理器810可以通过运行存储在内部存储器821的上述指令，从而使得数据传输装置800执行本申请一些实施例中所提供的数据传输方法、通信方法，以及各种应用以及数据处理等。内部存储器821可以包括存储程序区和存储数据区。
其中，存储程序区可存储操作系统；该存储程序区还可以存储一个或多个应用(比 如图库、联系人等)等。存储数据区可存储数据传输装置800使用过程中所创建的数据(比如照片，联系人等)等。此外，内部存储器821可以包括高速随机存取存储器，还可以包括非易失性存储器，例如一个或多个磁盘存储部件，闪存部件，通用闪存存储器(universal flash storage，UFS)等。在一些实施例中，处理器810可以通过运行存储在内部存储器821的指令，和/或存储在设置于处理器810中的存储器的指令，来使得数据传输装置800执行本申请实施例中所提供的灭屏显示的方法，以及其他应用及数据处理。数据传输装置800可以通过音频模块870，扬声器870A，受话器870B，麦克风870C，耳机接口870D，以及应用处理器等实现音频功能。例如音乐播放，录音等。
传感器模块880可以包括压力传感器880A，陀螺仪传感器880B，气压传感器880C，磁传感器880D，加速度传感器880E，距离传感器880F，接近光传感器880G，指纹传感器880H，温度传感器880J，触摸传感器880K，环境光传感器880L，骨传导传感器880M等。
本实施例还提供一种计算机存储介质，该计算机存储介质中存储有计算机指令，当该计算机指令在数据传输装置上运行时，使得数据传输装置执行上述相关方法步骤实现上述实施例中的数据传输方法。
本实施例还提供了一种计算机程序产品，当该计算机程序产品在计算机上运行时，使得计算机执行上述相关步骤，以实现上述实施例中的数据传输方法。
另外，本申请的实施例还提供一种装置，这个装置具体可以是芯片，组件或模块，该装置可包括相连的处理器和存储器；其中，存储器用于存储计算机执行指令，当装置运行时，处理器可执行存储器存储的计算机执行指令，以使芯片执行上述各方法实施例中的数据传输方法。
图15示出了一种芯片900的结构示意图。本申请中的数据传输装置，可以为该芯片900。其中芯片900包括一个或多个处理器910以及接口电路920。可选的，所述芯片900还可以包含总线930。
处理器910可能是一种集成电路芯片，具有信号的处理能力。在实现过程中，上述方法200的各步骤可以通过处理器910中的硬件的集成逻辑电路或者软件形式的指令完成。
可选地，上述的处理器910可以是通用处理器、DSP、ASIC、FPGA或者其它可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。可以实现或者执行本申请实施例中的公开的各方法、步骤。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。
接口电路920可以用于与其他装置进行通信。如，接口电路920可以用于数据、指令或者信息的发送或者接收，处理器910可以利用接口电路920接收的数据、指令或者其它信息，进行加工，可以将加工完成信息通过接口电路920发送出去。
例如，当该芯片900用于实现上述方法中第一节点的功能时，上述其他装置可以为上述实施例中所述的第二节点或第二节点中的装置(如第二节点中的数据传输装置)。
再例如，当该芯片900用于实现上述方法中第二节点的功能时，上述其他装置可以为上述实施例中所述的第一节点或第一节点中的装置(如第一节点中的数据传输装 置)。
可选的，芯片还包括存储器，存储器可以包括只读存储器和随机存取存储器，并向处理器提供操作指令和数据。存储器的一部分还可以包括非易失性随机存取存储器(non-volatile random access memory，NVRAM)。
可选的，存储器存储了可执行软件模块或者数据结构，处理器可以通过调用存储器存储的操作指令(该操作指令可存储在操作系统中)，执行相应的操作。
可选的，芯片可以使用在本申请实施例涉及的第一控制装置、第二控制装置或终端设备中。可选的，接口电路920可用于输出处理器910的执行结果。关于本申请的一个或多个实施例提供的数据传输方法可参考前述各个实施例，这里不再赘述。
需要说明的，处理器910、接口电路920各自对应的功能既可以通过硬件设计实现，也可以通过软件设计来实现，还可以通过软硬件结合的方式来实现，这里不作限制。
其中，本实施例提供的数据传输装置、计算机存储介质、计算机程序产品或芯片均用于执行上文所提供的对应的方法，因此，其所能达到的有益效果可参考上文所提供的对应的方法中的有益效果，此处不再赘述。
本实施例还提供一种座舱系统。该座舱系统包括上述数据传输装置300、数据传输装置500、数据传输装置700、或数据传输装置900。
本实施例还提供一种终端，可以为运输工具或者智能设备，含智能家居设备、智能穿戴设备、无人机、无人运输车、汽车或者机器人等。该终端包含上述数据传输装置200、数据传输装置300、数据传输装置400、数据传输装置500、数据传输装置600、数据传输装置700、数据传输装置800或数据传输装置900中的任一项。在一种实现方式中，该终端包括上述座舱系统。
本实施例还提供一种车辆，其上包含数据传输装置，该数据处理装置用于实现上述数据传输方法或通信方法中第一节点的功能。例如，该车辆可以包括上述数据传输装置300、数据传输装置500、数据传输装置700、或数据传输装置900中任一项。
应理解，在本申请的各种实施例中，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本申请实施例的实施过程构成任何限定。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执 行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(Read Only Memory，ROM)、随机存取存储器(Random Access Memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应所述以权利要求的保护范围为准。

Claims (21)

  1. 一种数据传输方法，其特征在于，所述方法包括：
    接收来自第一节点的第一配置信息，所述第一配置信息用于配置第一时频资源；
    获取第一逻辑信道对应的第一信息，所述第一信息用于指示是否允许对所述第一逻辑信道中的数据包分段；其中，所述第一逻辑信道对应第二时频资源，所述第二时频资源包含于所述第一时频资源；
    通过所述第一时频资源向所述第一节点发送第一数据。
  2. 根据权利要求1所述的方法，其特征在于，所述第一数据不包含所述第一逻辑信道中的数据包；
    其中，所述第一信息用于指示不允许对所述第一逻辑信道中的数据包分段，并且所述第二时频资源的大小不足以承载所述第一逻辑信道中的所有数据包；或者，所述第一信息用于指示不允许对所述第一逻辑信道中的数据包分段，并且所述第二时频资源的大小不足以承载所述第一逻辑信道中的任一数据包或者第一个数据包。
  3. 根据权利要求1所述的方法，其特征在于，所述第一数据中包含所述第一逻辑信道中的至少一个数据包；
    所述通过所述第一时频资源向所述第一节点发送第一数据，包括：
    根据所述第一信息或所述第二时频资源中至少一个，通过所述第二时频资源向所述第一节点发送所述第一逻辑信道中的所述至少一个数据包。
  4. 根据权利要求3所述的方法，其特征在于，所述第一数据中包含所述第一逻辑信道中的所有数据包；
    其中，所述第二时频资源的大小足以承载所述第一逻辑信道中的所有数据包。
  5. 根据权利要求3所述的方法，其特征在于，所述第一数据中包含所述第一逻辑信道中的至少一个数据包；
    所述第一信息用于指示不允许对第一逻辑信道中的数据包分段，所述第二时频资源的大小不足以承载所述第一逻辑信道中的所有数据包并且所述第二时频资源的大小足以承载所述至少一个数据包。
  6. 根据权利要求1-5任一项所述的方法，其特征在于，所述第一逻辑信道对应于第一数据队列，所述第一逻辑信道中的数据包包含业务数据包，或者所述第一逻辑信道中的数据包包含控制信令。
  7. 根据权利要求1-5任一项所述的方法，其特征在于，所述第一逻辑信道对应于第一协议栈实体，所述第一逻辑信道中的数据包为所述第一协议栈实体中的服务数据单元SDU。
  8. 根据权利要求1-7任一项所述的方法，其特征在于，所述获取第一逻辑信道对应的第一信息，包括：
    接收来自所述第一节点的第二配置信息，所述第二配置信息用于配置所述第一逻辑信道对应的所述第一信息。
  9. 根据权利要求1-7任一项所述的方法，其特征在于，所述获取第一逻辑信道对应的第一信息，包括：
    根据所述第一逻辑信道中的数据对应的服务质量QoS信息或业务类型，确定所述 第一逻辑信道对应的所述第一信息。
  10. 根据权利要求1-9任一项所述的方法，其特征在于，所述第一数据中包含第二逻辑信道中的至少一个数据包。
  11. 一种数据传输方法，其特征在于，所述方法包括：
    向第二节点发送第一配置信息，所述第一配置信息用于配置第一时频资源；
    向所述第二节点发送第二配置信息；所述第二配置信息用于指示是否允许对第一逻辑信道中的数据包分段；所述第一逻辑信道对应第二时频资源，所述第二时频资源包含于所述第一时频资源；
    通过所述第一时频资源接收来自所述第二节点的第一数据。
  12. 根据权利要求11所述的方法，其特征在于，所述第一逻辑信道对应于第一数据队列，所述第一逻辑信道中的数据包包含业务数据包，或者所述第一逻辑信道中的数据包为包含控制信令。
  13. 根据权利要求11所述的方法，其特征在于，所述第一逻辑信道对应于第一协议栈实体，所述第一逻辑信道中的数据包为所述第一协议栈实体中的服务数据单元SDU。
  14. 一种数据传输装置，其特征在于，所述装置包括：
    接收单元，用于接收来自第一节点的第一配置信息，所述第一配置信息用于配置第一时频资源；
    获取单元，用于获取第一逻辑信道对应的第一信息，所述第一信息用于指示是否允许对所述第一逻辑信道中的数据包分段；其中，所述第一逻辑信道对应第二时频资源，所述第二时频资源包含于所述第一时频资源；
    发送单元，用于通过所述第一时频资源向所述第一节点发送第一数据。
  15. 根据权利要求14所述的装置，其特征在于，所述第一数据不包含所述第一逻辑信道中的数据包；
    其中，所述第一信息用于指示不允许对所述第一逻辑信道中的数据包分段，并且所述第二时频资源的大小不足以承载所述第一逻辑信道中的所有数据包；
    或者，其中，所述第一信息用于指示不允许对所述第一逻辑信道中的数据包分段，并且所述第二时频资源的大小不足以承载所述第一逻辑信道中的任一数据包或者第一个数据包。
  16. 根据权利要求14所述的装置，其特征在于，所述第一数据中包含所述第一逻辑信道中的至少一个数据包；
    所述发送单元，具体用于根据所述第一信息或所述第二时频资源的大小中至少一个，通过所述第二时频资源发送所述至少一个数据包。
  17. 根据权利要求16所述的装置，其特征在于，所述第一数据中包含所述第一逻辑信道中的所有数据包；
    其中，所述第二时频资源的大小足以承载所述第一逻辑信道中的所有数据包。
  18. 根据权利要求16所述的装置，其特征在于，所述第一数据中包含所述第一逻辑信道中的至少一个数据包；
    所述第一信息用于指示不允许对第一逻辑信道中的数据包分段，所述第二时频资 源的大小不足以承载所述第一逻辑信道中的所有数据包并且所述第二时频资源的大小足以承载所述至少一个数据包。
  19. 一种数据传输装置，其特征在于，所述装置包括：
    发送单元，用于向第二节点发送第一配置信息；所述配置信息用于配置第一时频资源；
    所述发送单元，还用于向所述第二节点发送第二配置信息；所述第二配置信息用于指示是否允许对第一逻辑信道中的数据包分段；所述第一逻辑信道对应第二时频资源，所述第二时频资源包含于所述第一时频资源；
    接收单元，用于通过所述第一时频资源接收来自所述第二节点的第一数据。
  20. 一种数据传输装置，其特征在于，包括：至少一个处理器和接口电路，所述至少一个处理器用于通过所述接口电路与其它装置通信，并执行权利要求1至10中任一项或者权利要求11-13任一项所述的方法。
  21. 一种计算机可读存储介质，其特征在于，包括：计算机软件指令；
    当所述计算机软件指令在数据传输装置或内置在所述数据传输装置的芯片中运行时，使得所述数据传输装置执行如权利要求1至10中任一项或者权利要求11-13任一项所述的方法。
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ZTE CORPORATION: "Discussion on mode 3 resource allocation in PC5 CA", 3GPP DRAFT; R2-1801960, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG2, no. Athens, Greece; 20180226 - 20180302, 14 February 2018 (2018-02-14), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP051399052 *

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