WO2017124307A1 - 一种数据传输方法、装置及系统 - Google Patents

一种数据传输方法、装置及系统 Download PDF

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Publication number
WO2017124307A1
WO2017124307A1 PCT/CN2016/071390 CN2016071390W WO2017124307A1 WO 2017124307 A1 WO2017124307 A1 WO 2017124307A1 CN 2016071390 W CN2016071390 W CN 2016071390W WO 2017124307 A1 WO2017124307 A1 WO 2017124307A1
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WO
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Prior art keywords
data packet
network device
packet
header
data
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PCT/CN2016/071390
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English (en)
French (fr)
Inventor
陈君
郑潇潇
黄敏
Original Assignee
华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2016/071390 priority Critical patent/WO2017124307A1/zh
Publication of WO2017124307A1 publication Critical patent/WO2017124307A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/40—Network security protocols

Definitions

  • the present invention relates to the field of communications, and in particular, to a data transmission method, apparatus, and system.
  • the UE When transmitting voice data, the UE first encapsulates the voice data: the UE maps the voice data to the payload of the encapsulation protocol, and then fills the header of the corresponding protocol to form a voice data packet of the encapsulation protocol, and completes the rate. Match. The UE then sends the encapsulated voice data packet to the destination.
  • the voice data needs to pass the Packet Data Convergence Protocol (PDCP) layer and the Radio Link Control Protocol (RLC).
  • PDCP Packet Data Convergence Protocol
  • RLC Radio Link Control Protocol
  • the layer, the medium access control (MAC) layer, and the physical layer (physical layer, PHY layer) the voice data will fill the header of the corresponding protocol when passing through each protocol layer, resulting in the header of the encapsulated voice packet. It takes up a lot of space and reduces the efficiency of air interface transmission.
  • Embodiments of the present invention provide a data transmission method, apparatus, and system, which can reduce the space occupied by a data packet header and improve the efficiency of air interface transmission.
  • an embodiment of the present invention provides a data transmission method, including:
  • the communication device acquires a first data packet, where the first data packet includes at least a payload
  • the communication device adds a media access control MAC packet header to the first data packet, and generates a second data packet, where the MAC packet header includes at least: a first transmission sequence number SN, a data packet identifier PID, and a length identifier L;
  • the communication device transmits the second data packet.
  • the media access control MAC packet header is added to the first data packet, and the existing data packet passes through the PDCP layer and the RLC layer.
  • the MAC layer and the PHY layer at least eliminate the process of filling the RLC header for the data packet when the data packet passes through the RLC layer, thereby reducing the space occupied by the data packet header and improving the space. The efficiency of air interface transmission.
  • the communications device is a first user terminal
  • the sending, by the communications device, the second data packet includes:
  • the first user terminal sends the second data packet to the first radio access network device.
  • the communications device is a second radio access network device
  • the acquiring, by the communications device, the first data packet includes:
  • the sending, by the communications device, the second data packet includes:
  • the second radio access network device sends the second data packet to a second user terminal.
  • the MAC header further includes segment status information SS.
  • the MAC header further includes a protocol data unit format PDU type.
  • an embodiment of the present invention provides a data transmission method, including:
  • the first user terminal acquires a third data packet, where the third data packet includes at least a payload
  • the first user terminal adds a first header to the third data packet, and generates a fourth a data packet, the first packet header includes at least a data packet identifier PID;
  • the first user terminal adds a media access control MAC packet header to the fourth data packet, and generates a fifth data packet, where the MAC packet header includes at least: a first transmission sequence number SN and a length identifier L;
  • the first user terminal sends the fifth data packet to the first radio access network device.
  • the first packet header and the media access control MAC packet header are sequentially added to the third data packet, and the existing data packet is used.
  • the existing data packet is used.
  • the process of filling the RLC header for the data packet when the data packet passes through the RLC layer is omitted, and the data packet is reduced.
  • the space occupied by the packet header improves the efficiency of air interface transmission.
  • the first packet header further includes a second transmission sequence number SN.
  • the MAC header further includes segment status information SS.
  • the MAC header further includes a protocol data unit format PDU type.
  • an embodiment of the present invention provides a data transmission method, including:
  • the core network device acquires a third data packet, where the third data packet includes at least a payload
  • the core network device adds a first packet header to the third data packet, and generates a fourth data packet, where the first packet header includes at least a data packet identifier PID;
  • the core network device sends the fourth data packet to a second radio access network device.
  • the first packet header is added to the third data packet, and the existing data packet passes through the PDCP layer, the RLC layer, and the MAC layer.
  • the PHY layer at least saves the process of filling the RLC header for the data packet when the data packet passes through the RLC layer, reduces the space occupied by the data packet header, and improves the air interface transmission. s efficiency.
  • the first packet header further includes a second transmission sequence number SN.
  • an embodiment of the present invention provides a data transmission method, including:
  • the second radio access network device acquires a fourth data packet sent by the core network device, where
  • the fourth data packet includes a third data packet and a first packet header, the third data packet includes at least a payload, and the first packet header includes at least a data packet identifier PID;
  • the second radio access network device adds a media access control MAC packet header to the fourth data packet, and generates a fifth data packet, where the MAC packet header includes at least: a first transmission sequence number SN and a length identifier L;
  • the second radio access network device sends the fifth data packet to the second user terminal.
  • the MAC packet header is added to the fourth data packet, and the existing data packet passes through the PDCP layer and the RLC layer.
  • the MAC layer and the PHY layer at least eliminate the process of filling the RLC header for the data packet when the data packet passes through the RLC layer, thereby reducing the space occupied by the data packet header. Improve the efficiency of air interface transmission.
  • the first packet header further includes a second transmission sequence number SN.
  • the MAC header further includes segment status information SS.
  • the MAC header further includes a protocol data unit format PDU type.
  • an embodiment of the present invention provides a communications device, where the communications device includes an acquiring module, a processing module, and a sending module.
  • the acquiring module is configured to acquire a first data packet, where the first data packet includes at least a payload;
  • the processing module is configured to: after the acquiring module acquires the first data packet, add a media access control MAC packet header to the first data packet, and generate a second data packet, where the MAC packet header includes at least: the first transmission Serial number SN, data packet identification PID and length identifier L;
  • the sending module is configured to send the second data packet after the processing module generates the second data packet.
  • the communications device is a first user terminal
  • the sending module is specifically configured to send the second data packet to the first radio access network device after the processing module generates the second data packet.
  • the communications device is a second radio access network device
  • the acquiring module is specifically configured to acquire the first data packet sent by the core network device.
  • the sending module is specifically configured to send the second data packet to the second user terminal after the processing module generates the second data packet.
  • the MAC header further includes segment status information SS.
  • the MAC header further includes a protocol data unit format PDU type.
  • the embodiment of the present invention provides a user terminal, where the user terminal is a first user terminal, and the first user terminal includes an acquiring module, a processing module, and a sending module.
  • the acquiring module is configured to acquire a third data packet, where the third data packet includes at least a payload;
  • the processing module is configured to: after the acquiring module acquires the third data packet, add a first packet header to the third data packet, and generate a fourth data packet, where the first packet header includes at least a data packet identifier PID; Adding a media access control MAC packet header to the fourth data packet, generating a fifth data packet, where the MAC packet header includes at least: a first transmission sequence number SN and a length identifier L;
  • the sending module is configured to send the fifth data packet to the first radio access network device after the processing module generates the fifth data packet.
  • the first packet header further includes a second transmission sequence number SN.
  • the MAC header further includes segment status information SS.
  • the MAC header further includes a protocol data unit format PDU type.
  • the embodiment of the present invention provides a core network device, where the core network device includes an obtaining module, a processing module, and a sending module.
  • the acquiring module is configured to acquire a third data packet, where the third data packet includes at least a payload;
  • the processing module is configured to: after the acquiring module acquires the third data packet, add a first packet header to the third data packet, and generate a fourth data packet, where the first packet header includes at least a data packet identifier PID;
  • the sending module is configured to send the fourth data packet to the second radio access network device after the processing module generates the fourth data packet.
  • the first packet header further includes a second transmission sequence number SN.
  • an embodiment of the present invention provides a radio access network device, where the radio access network device is a second radio access network device, where the second radio access network device includes an acquiring module, a processing module, and a sending Module
  • the acquiring module is configured to acquire a fourth data packet sent by the core network device, where the fourth data packet includes a third data packet and a first packet header, where the third data packet includes at least a payload, and the first packet header At least including the packet identification PID;
  • the processing module is configured to: after the acquiring module acquires the fourth data packet sent by the core network device, add a media access control MAC packet header to the fourth data packet, and generate a fifth data packet, where the MAC packet header is at least
  • the method includes: a first transmission sequence number SN and a length identifier L;
  • the sending module is configured to send the fifth data packet to the second user terminal after the processing module generates the fifth data packet.
  • the first packet header further includes a second transmission sequence number SN.
  • the MAC header further includes segment status information SS.
  • the MAC header further includes a protocol data unit format PDU type.
  • an embodiment of the present invention provides a communications device, where the communications device includes a receiver, a processor, and a transmitter;
  • the receiver is configured to acquire a first data packet, where the first data packet includes at least a payload
  • the processor is configured to: after the receiver acquires the first data packet, add a media access control MAC packet header to the first data packet, to generate a second data packet, where the MAC packet header includes at least: the first transmission Serial number SN, data packet identification PID and length identifier L;
  • the transmitter is configured to send the second data packet after the processor generates the second data packet.
  • the communications device is a first user terminal
  • the transmitter is specifically configured to send the second data packet to the first radio access network device after the processor generates the second data packet.
  • the communications device is a second radio access network device
  • the receiver is specifically configured to acquire the first data packet sent by the core network device.
  • the transmitter is specifically configured to send the second data packet to the second user terminal after the processor generates the second data packet.
  • the MAC header further includes segment status information SS.
  • the MAC header further includes a protocol data unit format PDU type.
  • the embodiment of the present invention provides a user terminal, where the user terminal is a first user terminal, and the first user terminal includes a receiver, a processor, and a transmitter;
  • the processor after the receiver acquires the third data packet, is the Adding a first packet header to the third data packet, generating a fourth data packet, the first packet header includes at least a data packet identifier PID, and adding a media access control MAC packet header to the fourth data packet to generate a fifth data packet, where
  • the MAC header includes at least: a first transmission sequence number SN and a length identifier L;
  • the transmitter is configured to send the fifth data packet to the first radio access network device after the processor generates the fifth data packet.
  • the first packet header further includes a second transmission sequence number SN.
  • the MAC header further includes segment status information SS.
  • the MAC header further includes a protocol data unit format PDU type.
  • an embodiment of the present invention provides a core network device, where the core network device includes a receiver, a processor, and a transmitter;
  • the receiver is configured to acquire a third data packet, where the third data packet includes at least a payload
  • the processor is configured to: after the receiver acquires the third data packet, add a first packet header to the third data packet, and generate a fourth data packet, where the first packet header includes at least a data packet identifier PID;
  • the transmitter is configured to send the fourth data packet to the second radio access network device after the processor generates the fourth data packet.
  • the first packet header further includes a second transmission sequence number SN.
  • an embodiment of the present invention provides a radio access network device, where the radio access network device is a second radio access network device, where the second radio access network device includes a receiver, a processor, and Transmitter;
  • the receiver is configured to acquire a fourth data packet sent by the core network device, where the The fourth data packet includes a third data packet and a first packet header, the third data packet includes at least a payload, and the first packet header includes at least a data packet identifier PID;
  • the processor is configured to: after the receiver acquires the fourth data packet sent by the core network device, add a media access control MAC packet header to the fourth data packet, to generate a fifth data packet, where the MAC packet header is at least
  • the method includes: a first transmission sequence number SN and a length identifier L;
  • the transmitter is configured to send the fifth data packet to the second user terminal after the processor generates the fifth data packet.
  • the first packet header further includes a second transmission sequence number SN.
  • the MAC header further includes segment status information SS.
  • the MAC header further includes a protocol data unit format PDU type.
  • an embodiment of the present invention provides a user terminal, where the user terminal includes a memory, a processor, a communication interface, and a system bus;
  • the memory, the processor, and the communication interface are connected by the system bus, the memory is for storing computer instructions, and the processor is configured to execute computer instructions stored by the memory to cause the user terminal to execute A data transmission method as described in the above first aspect or second aspect.
  • an embodiment of the present invention provides a radio access network device, where the radio access network device includes a memory, a processor, a communication interface, and a system bus;
  • the memory, the processor and the communication interface are connected by the system bus, the memory is for storing computer instructions, and the processor is configured to execute computer instructions stored by the memory to enable the wireless access
  • the network device performs the data transmission method as described in the above first aspect or third aspect.
  • an embodiment of the present invention provides a core network device, where the core network device includes a memory, a processor, a communication interface, and a system bus;
  • the memory, the processor, and the communication interface are connected by the system bus, the memory is for storing computer instructions, and the processor is configured to execute the The computer stores the computer instructions to cause the core network device to perform the data transmission method as described in the fourth aspect above.
  • the embodiment of the present invention provides a data transmission system, where the data transmission system includes a user terminal, a radio access network device, and a core network device, where the user terminal may be the user equipment according to the thirteenth aspect.
  • the radio access network device may be the radio access network device according to the fourteenth aspect
  • the core network device may be the core network device according to the fifteenth aspect.
  • An embodiment of the present invention provides a data transmission method, apparatus, and system, where a first data packet is obtained by a communication device, where the first data packet includes at least a payload; the communication device adds a media access control MAC packet header to the first data packet, and generates a The second data packet, the MAC packet header includes at least: a first transmission sequence number SN, a data packet identifier PID, and a length identifier L; and the communication device sends the second data packet.
  • the communication device since the communication device adds the media access control MAC header to the first data packet after acquiring the first data packet, and the existing data packet passes through the PDCP layer, the RLC layer, the MAC layer, and the PHY layer.
  • FIG. 1 is a schematic diagram of a 5G system architecture according to an embodiment of the present invention
  • FIG. 2 is a schematic structural diagram of a protocol layer of a 5G system according to an embodiment of the present invention
  • FIG. 3 is a schematic flowchart 1 of a data transmission method according to an embodiment of the present disclosure
  • FIG. 4 is a schematic diagram of a format of a second data packet after adding a MAC header according to an embodiment of the present invention
  • FIG. 5 is a schematic flowchart 2 of a data transmission method according to an embodiment of the present disclosure.
  • FIG. 6 is a schematic diagram of a format of a second data packet after adding a first packet header according to an embodiment of the present disclosure
  • FIG. 7 is a schematic diagram of a format of a third data packet after adding a MAC header according to an embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of a communication device according to an embodiment of the present disclosure.
  • FIG. 9 is a schematic structural diagram of a user terminal according to an embodiment of the present disclosure.
  • FIG. 10 is a schematic structural diagram of a core network device according to an embodiment of the present disclosure.
  • FIG. 11 is a schematic structural diagram of a radio access network device according to an embodiment of the present disclosure.
  • FIG. 12 is a schematic structural diagram of another communication device according to an embodiment of the present disclosure.
  • FIG. 13 is a schematic structural diagram of another user terminal according to an embodiment of the present disclosure.
  • FIG. 14 is a schematic structural diagram of another core network device according to an embodiment of the present disclosure.
  • FIG. 15 is a schematic structural diagram of another radio access network device according to an embodiment of the present disclosure.
  • FIG. 16 is a schematic diagram of hardware of a user terminal according to an embodiment of the present disclosure.
  • FIG. 17 is a schematic diagram of hardware of a radio access network device according to an embodiment of the present disclosure.
  • FIG. 18 is a schematic diagram of hardware of a core network device according to an embodiment of the present invention.
  • the techniques described in the embodiments of the present invention can be used in various communication systems, particularly 5G communication systems, or other similar communication systems.
  • FIG. 1 is a schematic diagram of a 5G system architecture provided by an embodiment of the present invention.
  • the 5G system includes a core network device, a radio access network device, and a user terminal, where the core network device may include a Mobility Management Entity (MME) and a Serving Gateway (S-GW), where the MME sends a message.
  • MME Mobility Management Entity
  • S-GW Serving Gateway
  • the radio access network device can be an evolved Node B (Evolved Node B, eNode B) or Evolved Universal Terrestrial Radio Access Network (E-UTRAN).
  • the data transmission method provided by the embodiment of the present invention is performed between a user terminal, a core network device, and a radio access network device.
  • FIG. 2 is a schematic structural diagram of a protocol layer of a 5G system according to an embodiment of the present invention.
  • the radio access network device includes a MAC layer and a PHY layer
  • the core network device includes an upper protocol layer
  • the upper protocol layer refers to a protocol layer at an upper layer of the MAC layer, such as an application layer.
  • the PDCP layer may be located in the MAC layer (as shown in FIG. 2a) or in the upper protocol layer (as shown in FIG. 2b), wherein the PDCP layer is located in the MAC layer, meaning that the PDCP layer exists independently in the MAC layer, and
  • the MAC layer is located at the same protocol layer; or the MAC layer integrates the functions of the PDCP layer.
  • the PDCP layer is located in the upper layer protocol layer, which means that the PDCP layer exists independently in the upper layer protocol layer, and is located in the same protocol layer as the upper layer protocol layer; or the upper layer protocol layer integrates the function of the PDCP layer.
  • the user terminal includes a complete protocol layer structure, that is, a MAC layer, a PHY layer, and an upper protocol layer.
  • the main function of the PDCP layer is to compress and decompress the Internet Protocol (IP) headers between networks to transmit user data.
  • IP Internet Protocol
  • the main role of the MAC layer is to schedule, split/concatenate, retransmit, and deliver user data.
  • the main role of the PHY layer is to map user data to physical channels.
  • the data packet is first encapsulated in the first user terminal, and the encapsulation process includes the following steps: the payload is sent from the upper layer protocol layer (such as the application layer) to the MAC layer.
  • the layer is sent from the PHY layer, and after receiving the data packet, the second user terminal reverses decapsulation, that is, starting from the PHY layer, sequentially passing through a protocol layer such as a MAC layer, and sequentially removing the first user terminal in each layer protocol from the upper protocol layer.
  • the header added by the layer to the packet.
  • the data transmission method provided by the embodiment of the present invention can be used in a transmission scenario of a small data packet, for example, a transmission scenario of a voice data packet.
  • a transmission scenario of a voice data packet for example, a transmission scenario of a voice data packet.
  • one user terminal may transmit only small data packets to another user terminal for a long period of time, or one user terminal transmits small data to another user terminal at a fixed time interval for a period of time. package.
  • the execution entity of the embodiment of the present invention may be a user terminal, a radio access network device, or a core network device.
  • the following embodiments all describe the method of the present invention in a complete data transmission process (for example, the first user terminal sends data to the second user terminal), where the user terminal, the radio access network device or the core network is described in detail. It is possible for the device to perform the method provided by the present invention.
  • the radio access network device mentioned in the embodiment of the present invention may be a hardware device that is generally used for remote access to network resources, such as a base station, a router, or a hub.
  • the core network device may be a network such as a switch that normally functions as a core exchange or call routing function.
  • the embodiment of the present invention is not specifically limited.
  • first data packet and the second data packet described in the following embodiments of the present invention are collectively referred to as data packets when the PDCP layer is located in the communication system in the MAC layer, and the third data packet and the fourth data packet are collectively referred to.
  • the packet and the fifth data packet are collectively referred to as data packets when the PDCP layer is located in the communication system in the upper protocol layer.
  • the payload included in the first data packet may be the same as the payload included in the third data packet, or may be different. The present invention does not limit this.
  • system and “network” are used interchangeably herein.
  • the term “and/or” in this context is merely an association describing the associated object, indicating that there may be three relationships, for example, A and / or B, which may indicate that A exists separately, and both A and B exist, respectively. B these three situations.
  • the character "/" in this article generally indicates that the contextual object is an "or" relationship.
  • An embodiment of the present invention provides a data transmission method, which is applied to a communication system in which a PDCP layer is located in a MAC layer as shown in FIG. 2a, as shown in FIG.
  • the first user terminal acquires a first data packet, where the first data packet includes at least a payload.
  • the data needs to be sent from the application layer to the PHY layer through multiple protocol layers.
  • the first data packet passes through each protocol layer, and the first user terminal needs to add a header corresponding to the protocol layer for the first data packet.
  • the first data packet includes at least a payload, wherein the payload refers to transmission in a data packet
  • the user data portion can be in units of bits or bytes.
  • the first user terminal adds a MAC packet header to the first data packet, and generates a second data packet.
  • the MAC packet header includes at least: a first transmission sequence number (SN), a packet identifier (Petet Identifier, PID), and a length identifier. .
  • the first user terminal When the first data packet passes through the MAC layer of the first user terminal, the first user terminal adds a MAC header to the first data packet, and the first data packet after the MAC header is added is referred to as a second data packet.
  • the MAC header includes at least: a first transmission sequence number SN, a data packet identifier PID, and a length identifier L.
  • the MAC header may further include segmentation status information (SS).
  • SS segmentation status information
  • the MAC header may further include a protocol data unit type (PDU type).
  • PDU type protocol data unit type
  • the first SN is a transmission sequence number of a MAC protocol data unit (PDU), and is used for sequential transmission of the MAC layer.
  • L is used to indicate the length of each MAC Service Data Unit (SDU), and may be in units of bits or bytes.
  • the PID is used to indicate the header compression protocol.
  • the SS is used to indicate the status of a MAC SDU or a segmented MAC SDU, such as the location of the MAC SDU in the corresponding MAC PDU (eg, the MAC SDU is in the front, middle, or rear of the corresponding MAC PDU), and Indicates whether the MAC SDU at each location is a complete upper PDU or a fragmented upper PDU.
  • the data When the service is transmitted between the first user terminal and the second user terminal, the data may be transmitted through multiple data packets, and therefore, the data packets need to be transmitted in a certain order. For example, when the A service transmission is performed between the first user terminal and the second user terminal, the data is divided into ten data packets for transmission, and the data packets are all transmitted according to the data transmission method provided by the embodiment of the present invention, and the data is transmitted through the SN.
  • the first SN is used for sequential transmission of the MAC layer. That is, the first SN is used to indicate the order in which data packets are transmitted from the MAC layer to the PHY layer.
  • the format of the MAC header is not limited to the three formats shown in FIG. 4, as long as the first packet number SN, the packet identifier PID, and the length identifier L are included in the MAC header, the present invention does not. limit.
  • the first user terminal may also be the second data packet when the second data packet passes through the PHY layer of the first user terminal.
  • CRC Cyclical Redundancy Check
  • the first user terminal sends the second data packet to the first radio access network device.
  • the first user terminal After the first user terminal adds a media access control MAC header to the first data packet, and after generating the second data packet, the first user terminal can pass the air interface between the first user terminal and the first radio access network device (Air Interface) , AI) sends the second data packet to the first radio access network device.
  • the first user terminal is a user terminal that accesses the first radio access network device.
  • the first radio access network device may be a hardware device, such as a base station, a router, or a hub, which is generally used for remote access to network resources, and is not specifically limited in this embodiment of the present invention.
  • the first radio access network device receives the second data packet sent by the first user terminal.
  • step S103 The step corresponding to step S103.
  • the first radio access network device removes a MAC packet header of the second data packet to obtain a first data packet.
  • the second data packet After the first radio access network device receives the second data packet sent by the first user terminal, the second data packet needs to be unpacked. First, if a CRC is added to the second data packet when the second data packet passes through the PHY layer of the first user terminal, the first radio access network device removes the CRC at the PHY layer, and then the MAC of the first radio access network device. The layer removes the MAC header of the second data packet to obtain the first data packet.
  • the first radio access network device sends the first data packet to the core network device.
  • the radio access network device includes a MAC layer and a PHY layer, and the core network device includes an upper protocol layer, therefore, the MAC of the first radio access network device The layer removes the MAC header of the second data packet, and after obtaining the first data packet, the first radio access network device needs to send the first data packet to the core network device, so that the upper protocol layer of the core network device pairs the first data packet. Process and forward.
  • the core network device may be a network element that usually functions as a core switching or call routing function, such as a switch, and is not specifically limited in this embodiment of the present invention.
  • the core network device sends the first data packet to the second radio access network device.
  • the core network device forwards the first data packet to the second radio access network device.
  • the second radio access network device may be a hardware device, such as a base station, a router, or a hub, which is generally used for remote access to network resources, and is not specifically limited in this embodiment of the present invention.
  • the first radio access network device and the second radio access network device are the same type of device, that is, when the first radio access network device is a base station, the second radio access network device is also a base station; When the wireless access network device is a router, the second wireless access network device is also a router.
  • the core network device and the second radio access network device do not access the same core network device, the core network device and the second radio access that are accessed by the first radio access network device
  • the forwarding process of the first data packet exists between the core network devices accessed by the network device. Specifically, after the first radio access network device sends the first data packet to the core network device that is accessed by the first radio access network device, the core network device that is accessed by the first radio access network device sends the first data packet. And the core network device that is accessed by the second radio access network device, and the core network device that is accessed by the second radio access network device sends the first data packet to the second radio access network device.
  • the second radio access network device receives the first data packet sent by the core network device.
  • step S107 The step corresponding to step S107.
  • the second radio access network device adds a media access control MAC packet header to the first data packet, and generates a second data packet.
  • the MAC packet header includes at least: a first transmission sequence number SN, a data packet identifier PID, and a length identifier L.
  • the second radio access network device When the first data packet passes through the MAC layer of the second radio access network device, the second radio access network device adds a MAC header to the first data packet, and the first data packet after adding the MAC packet header is called the second data packet. .
  • the second radio access network device may also be the second data packet when passing through the PHY layer of the second radio access network device. Two packets are added with CRC.
  • the second radio access network device sends the second data packet to the second user terminal.
  • the second radio access network device After the second radio access network device adds a media access control MAC header to the first data packet, and after generating the second data packet, the second radio access network device may use the second radio access network device and the second user terminal.
  • the inter-AI sends the second data packet to the second user terminal.
  • the second user terminal is a user terminal that accesses the second radio access network device.
  • the second user terminal receives the second data packet sent by the second radio access network device.
  • step S110 The step corresponding to step S110.
  • the second user terminal removes the MAC header of the second data packet to obtain the first data packet.
  • the second data packet After the second user terminal receives the second data packet sent by the second radio access network device, the second data packet needs to be unpacked to obtain the first data packet. First, if the second data packet is added to the second data packet by the PHY layer of the second radio access network device, the second user terminal removes the CRC in the PHY layer, and then removes the MAC layer in the second user terminal. The MAC header of the second packet gets the first packet.
  • An embodiment of the present invention provides a data transmission method, where a first data packet is obtained by a communication device, where the first data packet includes at least a payload; the communication device adds a media access control MAC packet header to the first data packet, and generates a second data packet.
  • the MAC header includes at least: a first transmission sequence number SN, a data packet identifier PID, and a length identifier L; and the communication device transmits the second data packet.
  • An embodiment of the present invention provides a data transmission method, which is applied to a communication system in which a PDCP layer is located in an upper layer protocol layer as shown in FIG. 2b, as shown in FIG. 5.
  • the first user terminal acquires a third data packet, where the third data packet includes at least a payload.
  • the payload is the part of the user data transmitted in a packet, which can be in bits or bytes.
  • the first user terminal adds a first packet header to the third data packet, and generates a fourth data packet, where the first packet header includes at least a data packet identifier PID.
  • the first user terminal When the third data packet passes through the upper protocol layer of the first user terminal, the first user terminal adds a first packet header to the third data packet, and the third data packet after adding the first packet header is referred to as a fourth data packet.
  • the first header includes at least a packet identifier PID.
  • the first packet header further includes a second transmission sequence number SN.
  • the second SN is a transmission sequence number of the upper layer protocol data unit, and is used for sequential transmission of the upper protocol layer.
  • the data When the service is transmitted between the first user terminal and the second user terminal, the data may be transmitted through multiple data packets. Therefore, the data packets need to be transmitted in a certain order, and the data packets are represented by the SN.
  • the format of the first packet header is not limited to the two formats shown in FIG. 6, and the present invention is not limited as long as the second transmission sequence number SN is included in the first packet header.
  • the first user terminal adds a media access control MAC packet header to the fourth data packet, and generates a fifth data packet.
  • the MAC packet header includes at least: a first transmission sequence number SN and a length identifier L.
  • the first user terminal adds a first header to the third data packet in the upper protocol layer. After the fourth data packet, the first user terminal adds a media access control MAC header to the fourth data packet at the MAC layer to generate a fifth data packet.
  • the MAC header includes at least: a first transmission sequence number SN, a data packet identifier PID, and a length identifier L.
  • the MAC header further includes segmentation status information SS.
  • the MAC header further includes a protocol data unit format PDU type.
  • the first user terminal may also be the fifth data packet when the fifth data packet passes through the PHY layer of the first user terminal. Add a CRC.
  • the first user terminal sends the fifth data packet to the first radio access network device.
  • the first user terminal may send the fifth data packet to the first wireless by using an air interface (AI) between the first user terminal and the first wireless access network device.
  • AI air interface
  • the first user terminal is a user terminal that accesses the first radio access network device.
  • the first radio access network device receives the fifth data packet sent by the first user terminal.
  • step S204 The step corresponding to step S204.
  • the first radio access network device removes the MAC header of the fifth data packet to obtain a fourth data packet.
  • the fifth data packet After the first radio access network device receives the fifth data packet sent by the first user terminal, the fifth data packet needs to be unpacked. First, if the CRC layer is added to the fifth data packet when the fifth data packet passes through the PHY layer of the first user terminal, the first radio access network device removes the CRC at the PHY layer, and then the MAC of the first radio access network device. The layer removes the MAC header of the fifth data packet to obtain a fourth data packet.
  • the first radio access network device sends the fourth data packet to the first core network device.
  • the radio access network device includes a MAC layer and a PHY layer
  • the core network device includes an upper protocol layer. Therefore, the MAC header of the fifth data packet is removed at the MAC layer of the first radio access network device, and the first After the fourth data packet, the first wireless access The network device needs to send the fourth data packet to the core network device, so that the upper layer protocol layer of the core network device processes and forwards the fourth data packet.
  • the first core network device receives the fourth data packet sent by the first radio access network device.
  • step S207 The step corresponding to step S207.
  • the first core network device removes the first packet header of the fourth data packet to obtain a third data packet.
  • the first core network device sends a third data packet to the second core network device.
  • the second core network device receives the third data packet sent by the first core network device.
  • step S210 The step corresponding to step S210.
  • the second core network device adds a first packet header to the third data packet, and generates a fourth data packet, where the first packet header includes at least a data packet identifier PID.
  • the format of the first packet header may be the same as the format of the first packet header described in step S202, and details are not described herein again.
  • the second core network device sends the fourth data packet to the second radio access network device.
  • the first radio access network device and the second radio access network device can access the same core network device, that is, the first core network device and the second core network device are the same core network device.
  • the foregoing steps S209-S212 may or may not be performed; when the first core network device and the second core network device are not the same core network All the steps above need to be performed for the device.
  • the second radio access network device receives a fourth data packet sent by the second core network device, where the fourth data packet includes a third data packet and a first packet header, where the third data packet includes at least a payload, where the first packet header includes at least The packet identifies the PID.
  • the second radio access network device adds a media access control MAC packet header to the fourth data packet, and generates a fifth data packet.
  • the MAC packet header includes at least: a first transmission sequence number SN and a length identifier L.
  • the fourth data packet passes through the MAC of the second radio access network device.
  • the second radio access network device may further add a CRC to the fifth data packet when the fifth data packet passes through the PHY layer of the second radio access network device.
  • the second radio access network device sends the fifth data packet to the second user terminal.
  • the second radio access network device After the second radio access network device adds a media access control MAC header to the fourth data packet, and after generating the fifth data packet, the second radio access network device may use the second radio access network device and the second user terminal.
  • the inter-AI sends the fifth data packet to the second user terminal.
  • the second user terminal is a user terminal that accesses the second radio access network device.
  • the second user terminal receives the fifth data packet sent by the second radio access network device.
  • step S216 The step corresponding to step S216.
  • the second user terminal removes the MAC header of the fifth data packet to obtain a fourth data packet.
  • the second user terminal removes the first packet header of the fourth data packet to obtain a third data packet.
  • the fifth data packet needs to be unpacked in the order of the PHY layer to the upper layer protocol layer to obtain the third data packet.
  • An embodiment of the present invention provides a data transmission method, where a third data packet is obtained by a first user terminal, where the third data packet includes at least a payload; the first user terminal adds a first packet header to the third data packet, and generates a fourth data packet.
  • the first packet header includes at least a data packet identifier PID; the first user terminal adds a media access control MAC packet header to the fourth data packet, and generates a fifth data packet, where the MAC packet header includes at least: a first transmission sequence number SN and a length identifier L;
  • a user terminal sends a fifth data packet to the first radio access network device.
  • the first packet header and the media access control MAC packet header are sequentially added for the third data packet, and the existing data packet passes through the PDCP layer, the RLC layer, and the MAC packet.
  • the layer and the PHY layer at least eliminate the process of filling the RLC header for the data packet when the data packet passes through the RLC layer, thereby reducing the space occupied by the data packet header and improving the air interface. Transmission s efficiency.
  • the embodiment of the present invention provides a communication device.
  • the communication device is configured to perform the steps performed by the first user terminal or the second radio access network device in the foregoing method.
  • the communication device can include modules corresponding to the respective steps. Exemplarily, the acquisition module 10, the processing module 11, and the sending module 12 may be included.
  • the obtaining module 10 is configured to obtain a first data packet, where the first data packet includes at least a payload.
  • the processing module 11 is configured to: after the acquiring module 10 acquires the first data packet, add a media access control MAC packet header to the first data packet, and generate a second data packet, where the MAC packet header includes at least: a first transmission sequence number SN, a data packet identifier PID and length identification L.
  • the sending module 12 is configured to send the second data packet after the processing module 11 generates the second data packet.
  • the communication device is a first user terminal.
  • the sending module 12 is specifically configured to send the second data packet to the first radio access network device after the processing module 11 generates the second data packet.
  • the communication device is a second radio access network device.
  • the obtaining module 10 is specifically configured to acquire the first data packet sent by the core network device.
  • the sending module 12 is specifically configured to send the second data packet to the second user terminal after the processing module 11 generates the second data packet.
  • the MAC header further includes segment status information SS.
  • the MAC header further includes a protocol data unit format PDU type.
  • the communication device of the present embodiment may correspond to the communication device in the data transmission method of the embodiment of FIG. 3 described above, and the division and/or function of each module in the communication device of the embodiment is In order to implement the method flow shown in FIG. 3, for brevity, no further details are provided herein.
  • the function of the obtaining module 10 may be implemented by a receiver
  • the function of the processing module 11 may be implemented by a processor
  • the function of the transmitting unit 12 may be implemented by a transmitter.
  • the receiver and transmitter can be integrated in one transceiver.
  • the embodiment of the invention provides a communication device. Based on the description of the foregoing embodiment, after the communication device acquires the first data packet, the first data packet and the media access control MAC packet header are sequentially added for the first data packet, and the existing data packet passes through the PDCP layer and the RLC layer. Compared with the scheme of filling the packet header of the corresponding protocol for the data packet, the MAC layer and the PHY layer at least eliminate the process of filling the RLC header for the data packet when the data packet passes through the RLC layer, thereby reducing the space occupied by the data packet header and improving the space. The efficiency of air interface transmission.
  • the embodiment of the present invention provides a user terminal.
  • the user terminal is a first user terminal, and the first user terminal is configured to perform the steps performed by the first user terminal in the foregoing method.
  • the first user terminal may include a module corresponding to the corresponding step.
  • the acquisition module 20, the processing module 21, and the sending module 22 may be included.
  • the obtaining module 20 is configured to obtain a third data packet, where the third data packet includes at least a payload.
  • the processing module 21 is configured to: after the acquiring module 20 acquires the third data packet, add a first packet header to the third data packet, generate a fourth data packet, where the first packet header includes at least a data packet identifier PID; and add the fourth data packet
  • the media access control MAC header generates a fifth data packet, and the MAC header includes at least: a first transmission sequence number SN and a length identifier L.
  • the sending module 22 is configured to send the fifth data packet to the first radio access network device after the processing module 21 generates the fifth data packet.
  • the first packet header further includes a second transmission sequence number SN.
  • the MAC header further includes segment status information SS.
  • the MAC header further includes a protocol data unit format PDU type.
  • the first user terminal in this embodiment may correspond to the first user terminal in the data transmission method of the embodiment of FIG. 5, and the division of each module in the first user terminal in this embodiment. / or function, etc. are to achieve the method flow shown in Figure 5, for the sake of brevity, no longer repeat here.
  • the function of the acquisition module 20 may be implemented by a receiver
  • the function of the processing module 21 may be implemented by a processor
  • the function of the transmission unit 22 may be implemented by a transmitter.
  • the receiver and transmitter can be integrated in one transceiver.
  • the embodiment of the invention provides a user terminal. Based on the description of the foregoing embodiment, after the communication device acquires the third data packet, the first packet header and the media access control MAC packet header are sequentially added for the third data packet, and the existing data packet passes through the PDCP layer, the RLC layer, and the MAC packet. Compared with the scheme of filling the packet header of the corresponding protocol for the data packet, the layer and the PHY layer at least eliminate the process of filling the RLC header for the data packet when the data packet passes through the RLC layer, thereby reducing the space occupied by the data packet header and improving the air interface. The efficiency of the transmission.
  • the embodiment of the present invention provides a core network device.
  • the core network device is configured to perform the steps performed by the core network device in the foregoing method.
  • the core network device may include modules corresponding to the corresponding steps. Exemplarily, the acquisition module 30, the processing module 31, and the sending module 32 may be included.
  • the obtaining module 30 is configured to obtain a third data packet, where the third data packet includes at least a payload.
  • the processing module 31 is configured to add a first packet header to the third data packet after the acquiring module 30 acquires the third data packet, and generate a fourth data packet, where the first packet header includes at least a data packet identifier PID.
  • the sending module 32 is configured to send the fourth data packet to the second radio access network device after the processing module 31 generates the fourth data packet.
  • the first packet header further includes a second transmission sequence number SN.
  • the core network device in this embodiment may correspond to the core network device in the data transmission method in the foregoing embodiment of FIG. 5, and the division and/or function of each module in the core network device in this embodiment.
  • the method flow is as shown in FIG. 5, and is not described here for brevity.
  • the function of the obtaining module 30 may be implemented by a receiver
  • the function of the processing module 31 may be implemented by a processor
  • the function of the transmitting unit 32 may be implemented by a transmitter.
  • the receiver and transmitter can be integrated in one transceiver.
  • the embodiment of the invention provides a core network device. Based on the description of the foregoing embodiment, after the communication device acquires the third data packet, the first packet header and the media access control MAC packet header are sequentially added for the third data packet, and the existing data packet passes through the PDCP layer and the RLC.
  • the layer, the MAC layer, and the PHY layer fill the packet header of the corresponding protocol for the data packet, at least the process of filling the RLC header for the data packet when the data packet passes through the RLC layer is omitted, and the space occupied by the data packet header is reduced. Improve the efficiency of air interface transmission.
  • An embodiment of the present invention provides a radio access network device.
  • the radio access network device is a second radio access network device, and the second radio access network device is configured to perform the second radio in the foregoing method.
  • the second radio access network device may include a module corresponding to the corresponding step.
  • the acquisition module 40, the processing module 41, and the sending module 42 may be included.
  • the obtaining module 40 is configured to obtain a fourth data packet sent by the core network device, where the fourth data packet includes a third data packet and a first packet header, where the third data packet includes at least a payload, and the first packet header includes at least a data packet identifier PID.
  • the processing module 41 is configured to: after the acquiring module 40 acquires the fourth data packet sent by the core network device, add a media access control MAC packet header to the fourth data packet, and generate a fifth data packet, where the MAC packet header includes at least: a first transmission sequence number SN and length identifier L.
  • the sending module 42 is configured to send the fifth data packet to the second user terminal after the processing module 41 generates the fifth data packet.
  • the first packet header further includes a second transmission sequence number SN.
  • the MAC header further includes segment status information SS.
  • the MAC header further includes a protocol data unit format PDU type.
  • the second radio access network device in this embodiment may correspond to the second radio access network device in the data transmission method in the foregoing embodiment of FIG. 5, and the second radio access in this embodiment.
  • the division and/or function of each module in the network device are used to implement the method flow shown in FIG. 5. For brevity, no further details are provided herein.
  • the function of the obtaining module 40 may be implemented by a receiver
  • the function of the processing module 41 may be implemented by a processor
  • the function of the transmitting unit 42 may be implemented by a transmitter.
  • the receiver and transmitter can be integrated in one transceiver.
  • Embodiments of the present invention provide a radio access network device. Drawing based on the above embodiment
  • the communication device acquires the third data packet
  • the first packet header and the media access control MAC packet header are sequentially added for the third data packet, and the existing data packet passes through the PDCP layer, the RLC layer, the MAC layer, and the PHY layer.
  • the process of filling the RLC header for the data packet when the data packet passes through the RLC layer is omitted, the space occupied by the data packet header is reduced, and the efficiency of air interface transmission is improved.
  • the embodiment of the present invention provides a communication device.
  • the communication device is configured to perform the steps performed by the first user terminal or the second radio access network device in the foregoing method.
  • the communication device can include modules corresponding to the respective steps.
  • the receiver 50, the processor 51, and the transmitter 52 can be included.
  • the receiver 50 is configured to acquire a first data packet, where the first data packet includes at least a payload.
  • the processor 51 is configured to: after the receiver 50 acquires the first data packet, add a media access control MAC packet header to the first data packet, and generate a second data packet, where the MAC packet header includes at least: a first transmission sequence number SN, a data packet identifier PID and length identification L.
  • the transmitter 52 is configured to send the second data packet after the processor 51 generates the second data packet.
  • the communication device is a first user terminal.
  • the transmitter 52 is configured to send the second data packet to the first radio access network device after the processor 51 generates the second data packet.
  • the communication device is a second radio access network device.
  • the receiver 50 is specifically configured to acquire the first data packet sent by the core network device.
  • the transmitter 52 is specifically configured to send the second data packet to the second user terminal after the processor 51 generates the second data packet.
  • the MAC header further includes segment status information SS.
  • the MAC header further includes a protocol data unit format PDU type.
  • the communication device of the present embodiment may correspond to the communication device in the data transmission method of the embodiment of FIG. 3 described above, and the division and/or function of each module in the communication device of the embodiment is In order to implement the method flow shown in FIG. 3, for brevity, no further details are provided herein.
  • the receiver 50 and the transmitter 52 can be integrated into one transceiver.
  • the embodiment of the invention provides a communication device. Based on the description of the foregoing embodiment, after the communication device acquires the first data packet, the first data packet and the media access control MAC packet header are sequentially added for the first data packet, and the existing data packet passes through the PDCP layer and the RLC layer. Compared with the scheme of filling the packet header of the corresponding protocol for the data packet, the MAC layer and the PHY layer at least eliminate the process of filling the RLC header for the data packet when the data packet passes through the RLC layer, thereby reducing the space occupied by the data packet header and improving the space. The efficiency of air interface transmission.
  • the embodiment of the present invention provides a user terminal.
  • the user terminal is a first user terminal, and the first user terminal is configured to perform the steps performed by the first user terminal in the foregoing method.
  • the first user terminal may include a module corresponding to the corresponding step.
  • the receiver 60, the processor 61, and the transmitter 62 can be included.
  • the receiver 60 is configured to acquire a third data packet, where the third data packet includes at least a payload.
  • the processor 61 is configured to: after the receiver 60 acquires the third data packet, add a first packet header to the third data packet, generate a fourth data packet, where the first packet header includes at least a data packet identifier PID; and add the fourth data packet.
  • the media access control MAC header generates a fifth data packet, and the MAC header includes at least: a first transmission sequence number SN and a length identifier L.
  • the transmitter 62 is configured to send the fifth data packet to the first radio access network device after the processor 61 generates the fifth data packet.
  • the first packet header further includes a second transmission sequence number SN.
  • the MAC header further includes segment status information SS.
  • the MAC header further includes a protocol data unit format PDU type.
  • the first user terminal in this embodiment may correspond to the first user terminal in the data transmission method of the embodiment of FIG. 5, and the division of each module in the first user terminal in this embodiment. / or function, etc. are to achieve the method flow shown in Figure 5, for the sake of brevity, no longer repeat here.
  • receiver 60 and transmitter 62 may be integrated into one transceiver.
  • the embodiment of the invention provides a user terminal. Based on the description of the foregoing embodiment, after the communication device acquires the third data packet, the first packet header and the media access control MAC packet header are sequentially added for the third data packet, and the existing data packet passes through the PDCP layer, the RLC layer, and the MAC packet. Compared with the scheme of filling the packet header of the corresponding protocol for the data packet, the layer and the PHY layer at least eliminate the process of filling the RLC header for the data packet when the data packet passes through the RLC layer, thereby reducing the space occupied by the data packet header and improving the air interface. The efficiency of the transmission.
  • the embodiment of the present invention provides a core network device.
  • the core network device is configured to perform the steps performed by the core network device in the foregoing method.
  • the core network device may include modules corresponding to the corresponding steps.
  • the receiver 70, the processor 71, and the transmitter 72 can be included.
  • the receiver 70 is configured to acquire a third data packet, where the third data packet includes at least a payload.
  • the processor 71 is configured to add a first packet header to the third data packet after the receiver 70 acquires the third data packet, and generate a fourth data packet, where the first packet header includes at least a data packet identifier PID.
  • the transmitter 72 is configured to send the fourth data packet to the second radio access network device after the processor 71 generates the fourth data packet.
  • the first packet header further includes a second transmission sequence number SN.
  • the core network device in this embodiment may correspond to the core network device in the data transmission method in the foregoing embodiment of FIG. 5, and the division and/or function of each module in the core network device in this embodiment.
  • the method flow is as shown in FIG. 5, and is not described here for brevity.
  • the receiver 70 and the transmitter 72 can be integrated into one transceiver.
  • the embodiment of the invention provides a core network device. Based on the description of the foregoing embodiment, after the communication device acquires the third data packet, the first packet header and the media access control MAC packet header are sequentially added for the third data packet, and the existing data packet passes through the PDCP layer, the RLC layer, and the MAC packet. When the layer and the PHY layer are filled with the header of the corresponding protocol for the data packet, at least the packet is filled with the RLC header when the data packet passes through the RLC layer. The process reduces the space occupied by the packet header and improves the efficiency of air interface transmission.
  • the embodiment of the present invention provides a radio access network device.
  • the radio access network device is a second radio access network device, and the second radio access network device is configured to perform the second radio in the foregoing method.
  • the second radio access network device may include a module corresponding to the corresponding step.
  • the receiver 80, the processor 81, and the transmitter 82 can be included.
  • the receiver 80 is configured to acquire a fourth data packet sent by the core network device, where the fourth data packet includes a third data packet and a first packet header, where the third data packet includes at least a payload, and the first packet header includes at least a data packet identifier PID.
  • the processor 81 is configured to: after the receiver 80 acquires the fourth data packet sent by the core network device, add a media access control MAC packet header to the fourth data packet to generate a fifth data packet, where the MAC packet header includes at least: a first transmission sequence number SN and length identifier L.
  • the transmitter 82 is configured to send the fifth data packet to the second user terminal after the processor 81 generates the fifth data packet.
  • the first packet header further includes a second transmission sequence number SN.
  • the MAC header further includes segment status information SS.
  • the MAC header further includes a protocol data unit format PDU type.
  • the second radio access network device in this embodiment may correspond to the second radio access network device in the data transmission method in the foregoing embodiment of FIG. 5, and the second radio access in this embodiment.
  • the division and/or function of each module in the network device are used to implement the method flow shown in FIG. 5. For brevity, no further details are provided herein.
  • the receiver 80 and the transmitter 82 can be integrated into one transceiver.
  • Embodiments of the present invention provide a radio access network device. Based on the description of the foregoing embodiment, after the communication device acquires the third data packet, the first packet header and the media access control MAC packet header are sequentially added for the third data packet, and the existing data packet passes through the PDCP layer, the RLC layer, and the MAC packet. When the layer and the PHY layer are filled with the header of the corresponding protocol for the data packet, at least the packet is filled with the RLC packet when the data packet passes through the RLC layer. The process of the header reduces the space occupied by the packet header and improves the efficiency of the air interface transmission.
  • the embodiment of the present invention further provides a user terminal.
  • the terminal includes a memory 90, a processor 91, a communication interface 92, and a system bus 93.
  • the memory 90, the processor 91 and the communication interface 92 are connected by a system bus 93 for storing some computer instructions for executing computer instructions to cause the user terminal to perform the data transmission method as shown in FIG. 3 or 5.
  • a system bus 93 for storing some computer instructions for executing computer instructions to cause the user terminal to perform the data transmission method as shown in FIG. 3 or 5.
  • the processor 91 can be a central processing unit (CPU).
  • the processor 91 can also be a general-purpose processor, a digital signal processing (DSP), an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or Other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the processor 91 may be a dedicated processor, which may include at least one of a baseband processing chip, a radio frequency processing chip, and the like. Further, the dedicated processor may also include a chip having other dedicated processing functions of the user terminal.
  • the memory 90 may include a volatile memory such as a random-access memory (RAM); the memory 90 may also include a non-volatile memory such as a read only memory (read) -only memory, ROM), flash memory, hard disk drive (HDD) or solid-state drive (SSD); the memory 90 may also include a combination of the above types of memories.
  • RAM random-access memory
  • ROM read only memory
  • HDD hard disk drive
  • SSD solid-state drive
  • the memory 90 may also include a combination of the above types of memories.
  • System bus 93 can include a data bus, a power bus, a control bus, and a signal status bus. For the sake of clarity in the present embodiment, various buses are illustrated as the system bus 93 in FIG.
  • Communication interface 92 can include a receiver and a transmitter. And specific in the user terminal In implementation, the receiver and the transmitter may specifically be transceivers on the user terminal.
  • the transceiver can be a wireless transceiver.
  • the wireless transceiver can be an air interface of the user terminal or the like.
  • the processor 91 transmits and receives data to and from other devices, such as radio access network devices, through the transceiver.
  • each step in the method flow shown in FIG. 3 or FIG. 5 can be implemented by hardware executing a computer-executed instruction in a software form. To avoid repetition, we will not repeat them here.
  • the embodiment of the invention provides a user terminal. Based on the description of the foregoing embodiment, after the communication device acquires the first data packet, the first data packet and the media access control MAC packet header are sequentially added for the first data packet, and the existing data packet passes through the PDCP layer and the RLC layer. Compared with the scheme of filling the packet header of the corresponding protocol for the data packet, the MAC layer and the PHY layer at least eliminate the process of filling the RLC header for the data packet when the data packet passes through the RLC layer, thereby reducing the space occupied by the data packet header and improving the space. The efficiency of air interface transmission.
  • the radio access network device includes a memory 100, a processor 101, a communication interface 102, and a system bus 103.
  • the memory 100, the processor 101 and the communication interface 102 are connected by a system bus 103 for storing some computer instructions for executing computer instructions to cause the radio access network device to execute the data as shown in FIG. 3 or FIG. Transmission method.
  • a system bus 103 for storing some computer instructions for executing computer instructions to cause the radio access network device to execute the data as shown in FIG. 3 or FIG. Transmission method.
  • the processor 101 can be a CPU.
  • Processor 101 can also be other general purpose processors, DSPs, ASICs, FPGAs or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and the like.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the processor 101 may be a dedicated processor, which may include at least one of a baseband processing chip, a radio frequency processing chip, and the like. Further, the dedicated processor may also include a chip having other dedicated processing functions of the wireless access network device.
  • the memory 100 may include volatile memory, such as RAM; the memory 100 may also include non-volatile memory, such as ROM, flash memory, HDD or SSD; the memory 100 may also include a combination of the above types of memory.
  • the system bus 103 can include a data bus, a power bus, a control bus, and a signal status bus. For the sake of clarity in the present embodiment, various buses are illustrated as the system bus 103 in FIG.
  • Communication interface 102 can include a receiver and a transmitter. And in a specific implementation of the radio access network device, the receiver and the transmitter may be specifically a transceiver on the radio access network device.
  • the transceiver can be a wireless transceiver.
  • the wireless transceiver can be an antenna, air interface, etc. of the wireless access network device.
  • the processor 101 transmits and receives data to and from other devices, such as core network devices, through the transceiver.
  • each step in the method flow shown in FIG. 3 or FIG. 5 can be implemented by hardware executing a computer-executed instruction in a software form. To avoid repetition, we will not repeat them here.
  • Embodiments of the present invention provide a radio access network device. Based on the description of the foregoing embodiment, after the communication device acquires the first data packet, the first data packet and the media access control MAC packet header are sequentially added for the first data packet, and the existing data packet passes through the PDCP layer and the RLC layer. Compared with the scheme of filling the packet header of the corresponding protocol for the data packet, the MAC layer and the PHY layer at least eliminate the process of filling the RLC header for the data packet when the data packet passes through the RLC layer, thereby reducing the space occupied by the data packet header and improving the space. The efficiency of air interface transmission.
  • the embodiment of the present invention provides a core network device.
  • the core network device includes a memory 110, a processor 111, a communication interface 112, and a system bus 113.
  • the memory 110, the processor 111 and the communication interface 112 are connected by a system bus 113 for storing some computer instructions, and the processor 111 is configured to execute computer instructions to enable the core network device to execute the data transmission method as shown in FIG. 3 or FIG. .
  • the processor 111 is configured to execute computer instructions to enable the core network device to execute the data transmission method as shown in FIG. 3 or FIG. .
  • FIG. 3 or FIG. 5 For a specific data transmission method, refer to the related description in the foregoing embodiment shown in FIG. 3 or FIG. 5, and details are not described herein again.
  • the processor 111 can be a CPU.
  • the processor 111 can also be other general purpose processors, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, etc.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the processor 111 may be a dedicated processor, which may include at least one of a baseband processing chip, a radio frequency processing chip, and the like. Further, the dedicated processor may also include a chip having other dedicated processing functions of the core network device.
  • Memory 110 may include volatile memory, such as RAM; memory 110 may also include non-volatile memory, such as ROM, flash memory, HDD or SSD; memory 110 may also include a combination of the above-described types of memory.
  • the system bus 113 can include a data bus, a power bus, a control bus, and a signal status bus. For the sake of clarity in the present embodiment, various buses are illustrated as the system bus 113 in FIG.
  • Communication interface 112 can include a receiver and a transmitter. And in a specific implementation of the core network device, the receiver and the transmitter may specifically be transceivers on the core network device.
  • the transceiver can be a wireless transceiver.
  • the wireless transceiver can be an antenna, air interface, etc. of the core network device.
  • the processor 111 transmits and receives data to and from other devices, such as radio access network devices, through the transceiver.
  • each step in the method flow shown in FIG. 3 or FIG. 5 can be implemented by hardware executing a computer-executed instruction in a software form. To avoid repetition, we will not repeat them here.
  • the embodiment of the invention provides a core network device. Based on the description of the foregoing embodiment, after the communication device acquires the first data packet, the first data packet and the media access control MAC packet header are sequentially added for the first data packet, and the existing data packet passes through the PDCP layer and the RLC layer. Compared with the scheme of filling the packet header of the corresponding protocol for the data packet, the MAC layer and the PHY layer at least eliminate the process of filling the RLC header for the data packet when the data packet passes through the RLC layer, thereby reducing the space occupied by the data packet header and improving the space. The efficiency of air interface transmission.
  • Embodiments of the present invention provide a data transmission system, which includes a user terminal, a radio access network device, and a core network device.
  • a user terminal please refer to
  • a radio access network device refers to the description of the radio access network device in the embodiment shown in FIG. 16.
  • a description of the network device refer to the description of the core network device in the embodiment shown in FIG. 18, and details are not described herein again.
  • the user terminal performs the data transmission method of the embodiment of the present invention by performing corresponding steps in the method flow shown in FIG. 3 or FIG. 5 respectively; correspondingly, the wireless access network device passes Performing the data transmission method of the embodiment of the present invention by performing corresponding steps in the method flow shown in FIG. 3 or FIG. 5, the core network device completes the implementation of the present invention by executing corresponding steps in the method flow shown in FIG. 3 or FIG. Example of data transmission method.
  • the disclosed apparatus and method may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the modules or units is only a logical function division.
  • there may be another division manner for example, multiple units or components may be used. Combinations can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium.
  • the technical solution of the present invention which is essential or contributes to the prior art, or all or part of the technical solution, may be embodied in the form of a software product stored in a storage medium.
  • a number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) or a processor to perform all or part of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .

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Abstract

本发明实施例提供一种数据传输方法、装置及系统，涉及通信领域，能够降低数据包包头所占用的空间，提高空口传输的效率。该数据传输方法包括：通信设备获取第一数据包，第一数据包至少包括净荷；通信设备为第一数据包添加媒体接入控制MAC包头，生成第二数据包，MAC包头至少包括：第一传输序号SN、数据包标识PID和长度标识L；通信设备发送第二数据包。

Description

一种数据传输方法、装置及系统 技术领域
本发明涉及通信领域，尤其涉及一种数据传输方法、装置及系统。
背景技术
随着第五代移动通信技术(the 5th Generation mobile communication technology，5G)的迅速发展，用户终端(User Equipment，UE)之间的数据传输，尤其是语音数据的传输越来越多。
现有的第二代移动通信技术(the 2nd Generation mobile communication technology，2G)、第三代移动通信技术(the 3rd Generation mobile communication technology，3G)和第四代移动通信技术(the 4th Generation mobile communication technology，4G)在传输语音数据时，UE首先要将语音数据进行封装：UE将语音数据映射到封装协议的净荷中，然后填充对应协议的包头，形成封装协议的语音数据包，并完成速率适配。随后UE将封装好的语音数据包发送至目的端。
然而，现有的UE使用2G、3G和4G对语音数据进行封装时，语音数据需要经过分组数据汇聚协议(Packet Data Convergence Protocol，PDCP)层、无线链路控制层协议(Radio Link Control，RLC)层、媒体接入控制协议(Media Access Control，MAC)层和物理层(Physical Layer，PHY层)，语音数据经过每个协议层时都会填充对应协议的包头，导致封装好的语音数据包的包头占用了很大的空间，降低了空口传输的效率。
发明内容
本发明的实施例提供一种数据传输方法、装置及系统，能够降低数据包包头所占用的空间，提高空口传输的效率。
为达到上述目的，本发明的实施例采用如下技术方案：
第一方面，本发明实施例提供一种数据传输方法，包括：
通信设备获取第一数据包，所述第一数据包至少包括净荷；
所述通信设备为所述第一数据包添加媒体接入控制MAC包头，生成第二数据包，所述MAC包头至少包括：第一传输序号SN、数据包标识PID和长度标识L；
所述通信设备发送所述第二数据包。
本发明实施例提供的数据传输方法中，由于通信设备在获取第一数据包后，为所述第一数据包添加媒体接入控制MAC包头，与现有的数据包经过PDCP层、RLC层、MAC层和PHY层时都会为数据包填充对应协议的包头的方案相比，至少省去了数据包经过RLC层时为数据包填充RLC包头的过程，降低了数据包包头所占用的空间，提高空口传输的效率。
在第一种可能的实现方式中，所述通信设备为第一用户终端；
所述通信设备发送所述第二数据包，具体包括：
所述第一用户终端发送所述第二数据包至第一无线接入网设备。
在第二种可能的实现方式中，所述通信设备为第二无线接入网设备；
所述通信设备获取第一数据包，具体包括：
所述第二无线接入网设备获取核心网设备发送的所述第一数据包；
所述通信设备发送所述第二数据包，具体包括：
所述第二无线接入网设备发送所述第二数据包至第二用户终端。
进一步地，所述MAC包头还包括分段状态信息SS。
进一步地，所述MAC包头还包括协议数据单元格式PDU type。
第二方面，本发明实施例提供一种数据传输方法，包括：
第一用户终端获取第三数据包，所述第三数据包至少包括净荷；
所述第一用户终端为所述第三数据包添加第一包头，生成第四 数据包，所述第一包头至少包括数据包标识PID；
所述第一用户终端为所述第四数据包添加媒体接入控制MAC包头，生成第五数据包，所述MAC包头至少包括：第一传输序号SN和长度标识L；
所述第一用户终端发送所述第五数据包至第一无线接入网设备。
本发明实施例提供的数据传输方法中，由于第一用户终端在获取第三数据包后，为所述第三数据包依次添加第一包头和媒体接入控制MAC包头，与现有的数据包经过PDCP层、RLC层、MAC层和PHY层时都会为数据包填充对应协议的包头的方案相比，至少省去了数据包经过RLC层时为数据包填充RLC包头的过程，降低了数据包包头所占用的空间，提高空口传输的效率。
进一步地，所述第一包头还包括第二传输序号SN。
进一步地，所述MAC包头还包括分段状态信息SS。
进一步地，所述MAC包头还包括协议数据单元格式PDU type。
第三方面，本发明实施例提供一种数据传输方法，包括：
核心网设备获取第三数据包，所述第三数据包至少包括净荷；
所述核心网设备为所述第三数据包添加第一包头，生成第四数据包，所述第一包头至少包括数据包标识PID；
所述核心网设备发送所述第四数据包至第二无线接入网设备。
本发明实施例提供的数据传输方法中，由于核心网设备在获取第三数据包后，为所述第三数据包添加第一包头，与现有的数据包经过PDCP层、RLC层、MAC层和PHY层时都会为数据包填充对应协议的包头的方案相比，至少省去了数据包经过RLC层时为数据包填充RLC包头的过程，降低了数据包包头所占用的空间，提高空口传输的效率。
进一步地，所述第一包头还包括第二传输序号SN。
第四方面，本发明实施例提供一种数据传输方法，包括：
第二无线接入网设备获取核心网设备发送的第四数据包，所述 第四数据包包括第三数据包和第一包头，所述第三数据包至少包括净荷，所述第一包头至少包括数据包标识PID；
所述第二无线接入网设备为所述第四数据包添加媒体接入控制MAC包头，生成第五数据包，所述MAC包头至少包括：第一传输序号SN和长度标识L；
所述第二无线接入网设备发送所述第五数据包至第二用户终端。
本发明实施例提供的数据传输方法中，由于第二无线接入网设备在获取第四数据包后，为所述第四数据包添加MAC包头，与现有的数据包经过PDCP层、RLC层、MAC层和PHY层时都会为数据包填充对应协议的包头的方案相比，至少省去了数据包经过RLC层时为数据包填充RLC包头的过程，降低了数据包包头所占用的空间，提高空口传输的效率。
进一步地，所述第一包头还包括第二传输序号SN。
进一步地，所述MAC包头还包括分段状态信息SS。
进一步地，所述MAC包头还包括协议数据单元格式PDU type。
第五方面，本发明实施例提供一种通信设备，所述通信设备包括获取模块、处理模块和发送模块；
所述获取模块，用于获取第一数据包，所述第一数据包至少包括净荷；
所述处理模块，用于在所述获取模块获取第一数据包后，为所述第一数据包添加媒体接入控制MAC包头，生成第二数据包，所述MAC包头至少包括：第一传输序号SN、数据包标识PID和长度标识L；
所述发送模块，用于在所述处理模块生成所述第二数据包后，发送所述第二数据包。
本发明实施例提供的设备的技术效果可以参见上述第一方面通信设备执行的数据传输方法中描述的通信设备的技术效果，此处不再赘述。
在第一种可能的实现方式中，所述通信设备为第一用户终端；
所述发送模块，具体用于在所述处理模块生成所述第二数据包后，发送所述第二数据包至第一无线接入网设备。
在第二种可能的实现方式中，所述通信设备为第二无线接入网设备；
所述获取模块，具体用于获取核心网设备发送的所述第一数据包；
所述发送模块，具体用于在所述处理模块生成所述第二数据包后，发送所述第二数据包至第二用户终端。
进一步地，所述MAC包头还包括分段状态信息SS。
进一步地，所述MAC包头还包括协议数据单元格式PDU type。
第六方面，本发明实施例提供一种用户终端，所述用户终端为第一用户终端，所述第一用户终端包括获取模块、处理模块和发送模块；
所述获取模块，用于获取第三数据包，所述第三数据包至少包括净荷；
所述处理模块，用于在所述获取模块获取第三数据包后，为所述第三数据包添加第一包头，生成第四数据包，所述第一包头至少包括数据包标识PID；以及为所述第四数据包添加媒体接入控制MAC包头，生成第五数据包，所述MAC包头至少包括：第一传输序号SN和长度标识L；
所述发送模块，用于在所述处理模块生成第五数据包后，发送所述第五数据包至第一无线接入网设备。
本发明实施例提供的用户终端的技术效果可以参见上述第二方面第一用户终端执行的数据传输方法中描述的第一用户终端的技术效果，此处不再赘述。
进一步地，所述第一包头还包括第二传输序号SN。
进一步地，所述MAC包头还包括分段状态信息SS。
进一步地，所述MAC包头还包括协议数据单元格式PDU type。
第七方面，本发明实施例提供一种核心网设备，所述核心网设备包括获取模块、处理模块和发送模块；
所述获取模块，用于获取第三数据包，所述第三数据包至少包括净荷；
所述处理模块，用于在所述获取模块获取第三数据包后，为所述第三数据包添加第一包头，生成第四数据包，所述第一包头至少包括数据包标识PID；
所述发送模块，用于在所述处理模块生成第四数据包后，发送所述第四数据包至第二无线接入网设备。
本发明实施例提供的核心网设备的技术效果可以参见上述第三方面核心网设备执行的数据传输方法中描述的核心网设备的技术效果，此处不再赘述。
进一步地，所述第一包头还包括第二传输序号SN。
第八方面，本发明实施例提供一种无线接入网设备，所述无线接入网设备为第二无线接入网设备，所述第二无线接入网设备包括获取模块、处理模块和发送模块；
所述获取模块，用于获取核心网设备发送的第四数据包，所述第四数据包包括第三数据包和第一包头，所述第三数据包至少包括净荷，所述第一包头至少包括数据包标识PID；
所述处理模块，用于在所述获取模块获取核心网设备发送的第四数据包后，为所述第四数据包添加媒体接入控制MAC包头，生成第五数据包，所述MAC包头至少包括：第一传输序号SN和长度标识L；
所述发送模块，用于在所述处理模块生成第五数据包后，发送所述第五数据包至第二用户终端。
本发明实施例提供的无线接入网设备的技术效果可以参见上述第四方面第二无线接入网设备执行的数据传输方法中描述的第二无线接入网设备的技术效果，此处不再赘述。
进一步地，所述第一包头还包括第二传输序号SN。
进一步地，所述MAC包头还包括分段状态信息SS。
进一步地，所述MAC包头还包括协议数据单元格式PDU type。
第九方面，本发明实施例提供一种通信设备，所述通信设备包括接收器、处理器和发送器；
所述接收器，用于获取第一数据包，所述第一数据包至少包括净荷；
所述处理器，用于在所述接收器获取第一数据包后，为所述第一数据包添加媒体接入控制MAC包头，生成第二数据包，所述MAC包头至少包括：第一传输序号SN、数据包标识PID和长度标识L；
所述发送器，用于在所述处理器生成所述第二数据包后，发送所述第二数据包。
本发明实施例提供的设备的技术效果可以参见上述第一方面通信设备执行的数据传输方法中描述的通信设备的技术效果，此处不再赘述。
在第一种可能的实现方式中，所述通信设备为第一用户终端；
所述发送器，具体用于在所述处理器生成所述第二数据包后，发送所述第二数据包至第一无线接入网设备。
在第二种可能的实现方式中，所述通信设备为第二无线接入网设备；
所述接收器，具体用于获取核心网设备发送的所述第一数据包；
所述发送器，具体用于在所述处理器生成所述第二数据包后，发送所述第二数据包至第二用户终端。
进一步地，所述MAC包头还包括分段状态信息SS。
进一步地，所述MAC包头还包括协议数据单元格式PDU type。
第十方面，本发明实施例提供一种用户终端，所述用户终端为第一用户终端，所述第一用户终端包括接收器、处理器和发送器；
所述接收器，用于获取第三数据包，所述第三数据包至少包括净荷；
所述处理器，用于在所述接收器获取第三数据包后，为所述第 三数据包添加第一包头，生成第四数据包，所述第一包头至少包括数据包标识PID；以及为所述第四数据包添加媒体接入控制MAC包头，生成第五数据包，所述MAC包头至少包括：第一传输序号SN和长度标识L；
所述发送器，用于在所述处理器生成第五数据包后，发送所述第五数据包至第一无线接入网设备。
本发明实施例提供的用户终端的技术效果可以参见上述第二方面第一用户终端执行的数据传输方法中描述的第一用户终端的技术效果，此处不再赘述。
进一步地，所述第一包头还包括第二传输序号SN。
进一步地，所述MAC包头还包括分段状态信息SS。
进一步地，所述MAC包头还包括协议数据单元格式PDU type。
第十一方面，本发明实施例提供一种核心网设备，所述核心网设备包括接收器、处理器和发送器；
所述接收器，用于获取第三数据包，所述第三数据包至少包括净荷；
所述处理器，用于在所述接收器获取第三数据包后，为所述第三数据包添加第一包头，生成第四数据包，所述第一包头至少包括数据包标识PID；
所述发送器，用于在所述处理器生成第四数据包后，发送所述第四数据包至第二无线接入网设备。
本发明实施例提供的核心网设备的技术效果可以参见上述第三方面核心网设备执行的数据传输方法中描述的核心网设备的技术效果，此处不再赘述。
进一步地，所述第一包头还包括第二传输序号SN。
第十二方面，本发明实施例提供一种无线接入网设备，所述无线接入网设备为第二无线接入网设备，所述第二无线接入网设备包括接收器、处理器和发送器；
所述接收器，用于获取核心网设备发送的第四数据包，所述第 四数据包包括第三数据包和第一包头，所述第三数据包至少包括净荷，所述第一包头至少包括数据包标识PID；
所述处理器，用于在所述接收器获取核心网设备发送的第四数据包后，为所述第四数据包添加媒体接入控制MAC包头，生成第五数据包，所述MAC包头至少包括：第一传输序号SN和长度标识L；
所述发送器，用于在所述处理器生成第五数据包后，发送所述第五数据包至第二用户终端。
本发明实施例提供的无线接入网设备的技术效果可以参见上述第四方面第二无线接入网设备执行的数据传输方法中描述的第二无线接入网设备的技术效果，此处不再赘述。
进一步地，所述第一包头还包括第二传输序号SN。
进一步地，所述MAC包头还包括分段状态信息SS。
进一步地，所述MAC包头还包括协议数据单元格式PDU type。
第十三方面，本发明实施例提供一种用户终端，所述用户终端包括存储器、处理器、通信接口和系统总线；
所述存储器、所述处理器和所述通信接口通过所述系统总线连接，所述存储器用于存储计算机指令，所述处理器用于执行所述存储器存储的计算机指令，以使所述用户终端执行如上述第一方面或者第二方面中所述的数据传输方法。
第十四方面，本发明实施例提供一种无线接入网设备，所述无线接入网设备包括存储器、处理器、通信接口和系统总线；
所述存储器、所述处理器和所述通信接口通过所述系统总线连接，所述存储器用于存储计算机指令，所述处理器用于执行所述存储器存储的计算机指令，以使所述无线接入网设备执行如上述第一方面或第三方面中所述的数据传输方法。
第十五方面，本发明实施例提供一种核心网设备，所述核心网设备包括存储器、处理器、通信接口和系统总线；
所述存储器、所述处理器和所述通信接口通过所述系统总线连接，所述存储器用于存储计算机指令，所述处理器用于执行所述存 储器存储的计算机指令，以使所述核心网设备执行如上述第四方面中所述的数据传输方法。
第十六方面，本发明实施例提供一种数据传输系统，该数据传输系统包括用户终端、无线接入网设备和核心网设备，该用户终端可以为上述第十三方面所述的用户设备，该无线接入网设备可以为上述第十四方面所述的无线接入网设备，以及该核心网设备可以为上述第十五方面所述的核心网设备。
本发明实施例提供一种数据传输方法、装置及系统，通过通信设备获取第一数据包，第一数据包至少包括净荷；通信设备为第一数据包添加媒体接入控制MAC包头，生成第二数据包，MAC包头至少包括：第一传输序号SN、数据包标识PID和长度标识L；通信设备发送第二数据包。基于上述实施例的描述，由于通信设备在获取第一数据包后，为第一数据包添加媒体接入控制MAC包头，与现有的数据包经过PDCP层、RLC层、MAC层和PHY层时都会为数据包填充对应协议的包头的方案相比，至少省去了数据包经过RLC层时为数据包填充RLC包头的过程，降低了数据包包头所占用的空间，提高空口传输的效率。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例。
图1为本发明实施例提供的一种5G系统架构图；
图2为本发明实施例提供的一种5G系统的协议层结构示意图；
图3为本发明实施例提供的一种数据传输方法的流程示意图一；
图4为本发明实施例提供的添加了MAC包头后的第二数据包的格式示意图；
图5为本发明实施例提供的一种数据传输方法的流程示意图二；
图6为本发明实施例提供的添加了第一包头后的第二数据包的格式示意图；
图7为本发明实施例提供的添加了MAC包头后的第三数据包的格式示意图；
图8为本发明实施例提供的一种通信设备的结构示意图；
图9为本发明实施例提供的一种用户终端的结构示意图；
图10为本发明实施例提供的一种核心网设备的结构示意图；
图11为本发明实施例提供的一种无线接入网设备的结构示意图；
图12为本发明实施例提供的另一种通信设备的结构示意图；
图13为本发明实施例提供的另一种用户终端的结构示意图；
图14为本发明实施例提供的另一种核心网设备的结构示意图；
图15为本发明实施例提供的另一种无线接入网设备的结构示意图；
图16为本发明实施例提供的一种用户终端的硬件示意图；
图17为本发明实施例提供的一种无线接入网设备的硬件示意图；
图18为本发明实施例提供的一种核心网设备的硬件示意图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。
本发明实施例中描述的技术可用于各种通信系统，尤其是5G通信系统，或者其他类似的通信系统。
以5G系统为例，图1是本发明实施例提供的一种5G系统架构图。5G系统包括核心网设备、无线接入网设备和用户终端，其中，核心网设备可以包括移动管理实体(Mobility Management Entity，MME)和服务网关(Serving Gateway，S-GW)，其中，MME进行信令处理，S-GW进行数据处理。无线接入网设备可以为演进Node B (Evolved Node B，eNode B)或者演进的通用陆地无线接入网络(Evolved Universal Terrestrial Radio Access Network，E-UTRAN)。本发明实施例提供的数据传输方法就是在用户终端、核心网设备和无线接入网设备之间进行的。
图2是本发明实施例提供的5G系统的协议层结构示意图。在5G系统中，无线接入网设备包括MAC层和PHY层，核心网设备包括上层协议层，上层协议层是指处于MAC层上层的协议层，例如应用层。PDCP层可以位于MAC层中(如图2a所示)，也可以位于上层协议层中(如图2b所示)，其中，PDCP层位于MAC层中是指PDCP层独立存在于MAC层中，与MAC层位于同一协议层；或者MAC层集成有PDCP层的功能。同理，PDCP层位于上层协议层中是指PDCP层独立存在于上层协议层中，与上层协议层位于同一协议层；或者上层协议层集成有PDCP层的功能。而用户终端包括完整的协议层结构，即MAC层、PHY层和上层协议层。PDCP层的主要作用是对网络之间互连的协议(Internet Protocol，IP)头进行压缩、解压，传输用户数据。MAC层的主要作用是对用户数据的调度、分割/级联、重传以及按序递交等。PHY层的主要作用是对用户数据到物理信道的映射等。
当第一用户终端发送数据包至第二用户终端时，数据包首先要在第一用户终端内进行封装，封装的过程包括净荷从上层协议层(如应用层)开始依次经过MAC层等协议层，从PHY层发出，第二用户终端接收到数据包后，反向解封装，即从PHY层开始，依次经过MAC层等协议层，到上层协议层依次去除第一用户终端在每层协议层对数据包添加的包头。
本发明实施例提供的数据传输方法可以用在小数据包的传输场景，例如，语音数据包的传输场景。在这种场景下，一个用户终端可能在很长一段时间内只向另一个用户终端传输一些小数据包，或者一个用户终端在一段时间内以一个固定的时间间隔向另一个用户终端传输小数据包。
另外，本发明实施例的执行主体可以为用户终端、无线接入网设备或者核心网设备。下述实施例均以一次完整的数据传输过程(例如第一用户终端发送数据到第二用户终端)为例，对本发明的方法进行详细描述，其中，用户终端、无线接入网设备或者核心网设备都可能执行本发明提供的方法。本发明实施例所提到的无线接入网设备可以是基站、路由器或者集线器等通常用于远程访问网络资源的硬件设备，核心网设备可以为交换机等通常起到核心交换或者呼叫路由功能的网元，本发明实施例并不做具体限制。
需要说明的是，本发明下述实施例中所描述的第一数据包和第二数据包是PDCP层位于MAC层中的通信系统中时对数据包的统称，第三数据包、第四数据包和第五数据包是PDCP层位于上层协议层中的通信系统中时对数据包的统称。在实际的应用中，第一数据包所包含的净荷可以与第三数据包所包含的净荷相同，也可以不同，本发明对此不作限制。
还需要说明的是，本文中术语“系统”和“网络”在本文中常被可互换使用。本文中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
本发明实施例提供一种数据传输方法，应用于如图2a所示的PDCP层位于MAC层中的通信系统中，如图3所示。
S101、第一用户终端获取第一数据包，第一数据包至少包括净荷。
由于通信协议栈的设计，当第一用户终端发送第一数据包至第二用户终端时，数据需要从应用层往下需经过多个协议层，从PHY层发出。第一数据包经过每个协议层，第一用户终端都需要为第一数据包添加该协议层对应的包头。
第一数据包至少包括净荷，其中，净荷是指一个数据包中传输 的用户数据部分，可以以比特(bit)或字节(byte)为单位。
S102、第一用户终端为第一数据包添加MAC包头，生成第二数据包，MAC包头至少包括：第一传输序号(Sequence Number，SN)、数据包标识(Packet Identifier，PID)和长度标识L。
当第一数据包经过第一用户终端的MAC层时，第一用户终端为第一数据包添加MAC包头，添加了MAC包头后的第一数据包称为第二数据包。
如图4所示，为添加了MAC包头后的第二数据包的三种格式。MAC包头至少包括：第一传输序号SN、数据包标识PID和长度标识L。
进一步地，MAC包头还可以包括分段状态信息(Segmentation Status，SS)。
进一步地，MAC包头还可以包括协议数据单元格式(Protocol Data Unit type，PDU type)。
其中，第一SN为MAC协议数据单元(Protocol Data Unit，PDU)的传输序号，用于MAC层的按序传输。L用于指示每个MAC业务数据单元(Service Data Unit，SDU)的长度，可以以比特(bit)或字节(byte)为单位。PID用于指示头压缩协议。SS用于指示一个MAC SDU或分段的MAC SDU的状态，比如该MAC SDU在对应的MAC PDU中的位置(如该MAC SDU在对应的MAC PDU中的前部、中部或后部)，以及指示每个位置上的MAC SDU为一个完整的上层PDU还是分段的上层PDU。
由于第一用户终端和第二用户终端之间进行业务传输时，数据可能是通过多个数据包进行传输的，因此，这些数据包需要按照一定的顺序进行传输。例如，第一用户终端和第二用户终端之间进行A业务传输时，数据被分为十个数据包进行传输，这些数据包均要按照本发明实施例提供的数据传输方法进行传输，通过SN来表示数据包之间的传输顺序，其中，第一SN用于MAC层的按序传输。即第一SN用于表示数据包从MAC层传输到PHY层时的顺序。
需要说明的是，MAC包头的格式并不局限于图4所示的三种格式，只要能保证MAC包头内包括第一传输序号SN、数据包标识PID和长度标识L即可，本发明不做限制。
需要补充的是，第一数据包经过第一用户终端的MAC层转换为第二数据包后，第一用户终端还可以在第二数据包经过第一用户终端的PHY层时为第二数据包添加循环冗余校验码(Cyclical Redundancy Check，CRC)。其中，CRC用于保证设备之间传输数据的正确性。
S103、第一用户终端发送第二数据包至第一无线接入网设备。
在第一用户终端为第一数据包添加媒体接入控制MAC包头，生成第二数据包后，第一用户终端可以通过第一用户终端与第一无线接入网设备之间的空口(Air Interface，AI)将第二数据包发送至第一无线接入网设备。其中，第一用户终端为接入第一无线接入网设备的用户终端。第一无线接入网设备可以为基站、路由器或者集线器等通常用于远程访问网络资源的硬件设备，本发明实施例并不做具体限制。
S104、第一无线接入网设备接收第一用户终端发送的第二数据包。
与步骤S103相对应的步骤。
S105、第一无线接入网设备去除第二数据包的MAC包头，得到第一数据包。
在第一无线接入网设备接收第一用户终端发送的第二数据包后，需要对第二数据包进行解包。首先，若第二数据包经过第一用户终端的PHY层时为第二数据包添加了CRC，则第一无线接入网设备在PHY层去除CRC，再在第一无线接入网设备的MAC层去除第二数据包的MAC包头，得到第一数据包。
S106、第一无线接入网设备发送第一数据包至核心网设备。
由于在5G系统中，无线接入网设备包括MAC层和PHY层，核心网设备包括上层协议层，因此，在第一无线接入网设备的MAC 层去除第二数据包的MAC包头，得到第一数据包后，第一无线接入网设备需要将第一数据包发送至核心网设备，以使得核心网设备的上层协议层对第一数据包进行处理、转发。核心网设备可以为交换机等通常起到核心交换或者呼叫路由功能的网元，本发明实施例并不做具体限制。
S107、核心网设备发送第一数据包至第二无线接入网设备。
核心网设备将第一数据包转发给第二无线接入网设备。第二无线接入网设备可以为基站、路由器或者集线器等通常用于远程访问网络资源的硬件设备，本发明实施例并不做具体限制。
通常的，第一无线接入网设备和第二无线接入网设备是同类型的设备，即第一无线接入网设备为基站时，第二无线接入网设备也为基站；即第一无线接入网设备为路由器时，第二无线接入网设备也为路由器。
需要说明的是，若第一无线接入网设备和第二无线接入网设备没有接入同一个核心网设备，则第一无线接入网设备接入的核心网设备和第二无线接入网设备接入的核心网设备之间也存在第一数据包的转发过程。具体的，在第一无线接入网设备发送第一数据包至第一无线接入网设备接入的核心网设备后，第一无线接入网设备接入的核心网设备发送第一数据包至第二无线接入网设备接入的核心网设备，第二无线接入网设备接入的核心网设备再发送第一数据包至第二无线接入网设备。
S108、第二无线接入网设备接收核心网设备发送的第一数据包。
与步骤S107相对应的步骤。
S109、第二无线接入网设备为第一数据包添加媒体接入控制MAC包头，生成第二数据包，MAC包头至少包括：第一传输序号SN、数据包标识PID和长度标识L。
当第一数据包经过第二无线接入网设备的MAC层时，第二无线接入网设备为第一数据包添加MAC包头，添加了MAC包头后的第一数据包称为第二数据包。
需要补充的是，第一数据包经过第二无线接入网设备的MAC层后，第二无线接入网设备还可以在第二数据包经过第二无线接入网设备的PHY层时为第二数据包添加CRC。
S110、第二无线接入网设备发送第二数据包至第二用户终端。
在第二无线接入网设备为第一数据包添加媒体接入控制MAC包头，生成第二数据包后，第二无线接入网设备可以通过第二无线接入网设备与第二用户终端之间的AI将第二数据包发送至第二用户终端。其中，第二用户终端为接入第二无线接入网设备的用户终端。
S111、第二用户终端接收第二无线接入网设备发送的第二数据包。
与步骤S110相对应的步骤。
S112、第二用户终端去除第二数据包的MAC包头，得到第一数据包。
在第二用户终端接收第二无线接入网设备发送的第二数据包后，需要对第二数据包进行解包，才能得到第一数据包。首先，若第二数据包经过第二无线接入网设备的PHY层时为第二数据包添加了CRC，则第二用户终端在PHY层去除CRC，再在第二用户终端的MAC层去除第二数据包的MAC包头，得到第一数据包。
本发明实施例提供一种数据传输方法，通过通信设备获取第一数据包，第一数据包至少包括净荷；通信设备为第一数据包添加媒体接入控制MAC包头，生成第二数据包，MAC包头至少包括：第一传输序号SN、数据包标识PID和长度标识L；通信设备发送第二数据包。基于上述实施例的描述，由于通信设备在获取第一数据包后，为第一数据包添加媒体接入控制MAC包头，与现有的数据包经过PDCP层、RLC层、MAC层和PHY层时都会为数据包填充对应协议的包头的方案相比，至少省去了数据包经过RLC层时为数据包填充RLC包头的过程，降低了数据包包头所占用的空间，提高了空口传输的效率。
本发明实施例提供一种数据传输方法，应用于如图2b所示的PDCP层位于上层协议层中的通信系统中，如图5所示。
S201、第一用户终端获取第三数据包，第三数据包至少包括净荷。
净荷是指一个数据包中传输的用户数据部分，可以以比特(bit)或字节(byte)为单位。
S202、第一用户终端为第三数据包添加第一包头，生成第四数据包，第一包头至少包括数据包标识PID。
当第三数据包经过第一用户终端的上层协议层时，第一用户终端为第三数据包添加第一包头，添加了第一包头后的第三数据包称为第四数据包。
如图6所示，为添加了第一包头后的第四数据包的两种格式。第一包头至少包括数据包标识PID。
进一步地，第一包头还包括第二传输序号SN。
其中，第二SN为上层协议数据单元的传输序号，用于上层协议层的按序传输。
由于第一用户终端和第二用户终端之间进行业务传输时，数据可能是通过多个数据包进行传输的，因此，这些数据包需要按照一定的顺序进行传输，通过SN来表示数据包之间的传输顺序，其中，第二SN用于上层协议层的按序传输。即第二SN用于表示数据包从上层协议层传输到MAC层时的顺序。
需要说明的是，第一包头的格式并不局限于图6所示的两种格式，只要能保证第一包头内包括第二传输序号SN即可，本发明不做限制。
S203、第一用户终端为第四数据包添加媒体接入控制MAC包头，生成第五数据包，MAC包头至少包括：第一传输序号SN和长度标识L。
第一用户终端在上层协议层中为第三数据包添加第一包头，生 成第四数据包后，第一用户终端在MAC层为第四数据包添加媒体接入控制MAC包头，生成第五数据包。
具体的，如图7所示，为添加了MAC包头后的第五数据包的三种格式。MAC包头至少包括：第一传输序号SN、数据包标识PID和长度标识L。
进一步地，MAC包头还包括分段状态信息SS。
进一步地，MAC包头还包括协议数据单元格式PDU type。
需要补充的是，第四数据包经过第一用户终端的MAC层转换为第五数据包后，第一用户终端还可以在第五数据包经过第一用户终端的PHY层时为第五数据包添加CRC。
S204、第一用户终端发送第五数据包至第一无线接入网设备。
在第一用户终端生成第五数据包后，第一用户终端可以通过第一用户终端与第一无线接入网设备之间的空口(Air Interface，AI)将第五数据包发送至第一无线接入网设备。其中，第一用户终端为接入第一无线接入网设备的用户终端。
S205、第一无线接入网设备接收第一用户终端发送的第五数据包。
与步骤S204相对应的步骤。
S206、第一无线接入网设备去除第五数据包的MAC包头，得到第四数据包。
在第一无线接入网设备接收第一用户终端发送的第五数据包后，需要对第五数据包进行解包。首先，若第五数据包经过第一用户终端的PHY层时为第五数据包添加了CRC，则第一无线接入网设备在PHY层去除CRC，再在第一无线接入网设备的MAC层去除第五数据包的MAC包头，得到第四数据包。
S207、第一无线接入网设备发送第四数据包至第一核心网设备。
由于在5G系统中，无线接入网设备包括MAC层和PHY层，核心网设备包括上层协议层，因此，在第一无线接入网设备的MAC层去除第五数据包的MAC包头，得到第四数据包后，第一无线接入 网设备需要将第四数据包发送至核心网设备，以使得核心网设备的上层协议层对第四数据包进行处理、转发。
S208、第一核心网设备接收第一无线接入网设备发送的第四数据包。
与步骤S207相对应的步骤。
S209、第一核心网设备去除第四数据包的第一包头，得到第三数据包。
S210、第一核心网设备发送第三数据包至第二核心网设备。
S211、第二核心网设备接收第一核心网设备发送的第三数据包。
与步骤S210对应的步骤。
S212、第二核心网设备为第三数据包添加第一包头，生成第四数据包，第一包头至少包括数据包标识PID。
具体的，第一包头的格式可以和步骤S202中描述的第一包头的格式相同，此处不再赘述。
S213、第二核心网设备发送第四数据包至第二无线接入网设备。
需要说明的是，第一无线接入网设备可以和第二无线接入网设备接入同一个核心网设备，即第一核心网设备与第二核心网设备为同一个核心网设备。当第一核心网设备和第二核心网设备是同一个核心网设备时，上述步骤S209-S212可以执行，也可以不执行；当第一核心网设备和第二核心网设备不是同一个核心网设备时需要全部执行上述步骤。
S214、第二无线接入网设备接收第二核心网设备发送的第四数据包，第四数据包包括第三数据包和第一包头，第三数据包至少包括净荷，第一包头至少包括数据包标识PID。
与步骤S213相对应的步骤。
S215、第二无线接入网设备为第四数据包添加媒体接入控制MAC包头，生成第五数据包，MAC包头至少包括：第一传输序号SN和长度标识L。
需要补充的是，第四数据包经过第二无线接入网设备的MAC 层，生成第五数据包后，第二无线接入网设备还可以在第五数据包经过第二无线接入网设备的PHY层时为第五数据包添加CRC。
S216、第二无线接入网设备发送第五数据包至第二用户终端。
在第二无线接入网设备为第四数据包添加媒体接入控制MAC包头，生成第五数据包后，第二无线接入网设备可以通过第二无线接入网设备与第二用户终端之间的AI将第五数据包发送至第二用户终端。其中，第二用户终端为接入第二无线接入网设备的用户终端。
S217、第二用户终端接收第二无线接入网设备发送的第五数据包。
与步骤S216相对应的步骤。
S218、第二用户终端去除第五数据包的MAC包头，得到第四数据包。
S219、第二用户终端去除第四数据包的第一包头，得到第三数据包。
在第二用户终端接收第二无线接入网设备发送的第五数据包后，需要对第五数据包按照PHY层到上层协议层的顺序依次进行解包，才能得到第三数据包。
本发明实施例提供一种数据传输方法，通过第一用户终端获取第三数据包，第三数据包至少包括净荷；第一用户终端为第三数据包添加第一包头，生成第四数据包，第一包头至少包括数据包标识PID；第一用户终端为第四数据包添加媒体接入控制MAC包头，生成第五数据包，MAC包头至少包括：第一传输序号SN和长度标识L；第一用户终端发送第五数据包至第一无线接入网设备。基于上述实施例的描述，由于通信设备在获取第三数据包后，为第三数据包依次添加第一包头和媒体接入控制MAC包头，与现有的数据包经过PDCP层、RLC层、MAC层和PHY层时都会为数据包填充对应协议的包头的方案相比，至少省去了数据包经过RLC层时为数据包填充RLC包头的过程，降低了数据包包头所占用的空间，提高空口传输 的效率。
本发明实施例提供一种通信设备，如图8所示，通信设备用于执行以上方法中的第一用户终端或者第二无线接入网设备所执行的步骤。通信设备可以包括相应步骤所对应的模块。示例性的，可以包括获取模块10、处理模块11和发送模块12。
获取模块10，用于获取第一数据包，第一数据包至少包括净荷。
处理模块11，用于在获取模块10获取第一数据包后，为第一数据包添加媒体接入控制MAC包头，生成第二数据包，MAC包头至少包括：第一传输序号SN、数据包标识PID和长度标识L。
发送模块12，用于在处理模块11生成第二数据包后，发送第二数据包。
可选的，通信设备为第一用户终端。
发送模块12，具体用于在处理模块11生成第二数据包后，发送第二数据包至第一无线接入网设备。
可选的，通信设备为第二无线接入网设备。
获取模块10，具体用于获取核心网设备发送的第一数据包。
发送模块12，具体用于在处理模块11生成第二数据包后，发送第二数据包至第二用户终端。
可选的，MAC包头还包括分段状态信息SS。
可选的，MAC包头还包括协议数据单元格式PDU type。
可以理解的是，本实施例的通信设备可对应于上述如图3的实施例的数据传输方法中的通信设备，并且本实施例的通信设备中的各个模块的划分和/或功能等均是为了实现如图3所示的方法流程，为了简洁，在此不再赘述。
可选地，作为本发明的另一个实施例，获取模块10的功能可以由接收器实现，处理模块11的功能可以由处理器实现，发送单元12的功能可以由发送器实现。其中，接收器和发送器可以集成在一个收发器内。
本发明法实施例提供一种通信设备。基于上述实施例的描述，由于通信设备在获取第一数据包后，为第一数据包依次添加第一数据包和媒体接入控制MAC包头，与现有的数据包经过PDCP层、RLC层、MAC层和PHY层时都会为数据包填充对应协议的包头的方案相比，至少省去了数据包经过RLC层时为数据包填充RLC包头的过程，降低了数据包包头所占用的空间，提高空口传输的效率。
本发明实施例提供一种用户终端，如图9所示，用户终端为第一用户终端，第一用户终端用于执行以上方法中的第一用户终端所执行的步骤。第一用户终端可以包括相应步骤所对应的模块。示例性的，可以包括获取模块20、处理模块21和发送模块22。
获取模块20，用于获取第三数据包，第三数据包至少包括净荷。
处理模块21，用于在获取模块20获取第三数据包后，为第三数据包添加第一包头，生成第四数据包，第一包头至少包括数据包标识PID；以及为第四数据包添加媒体接入控制MAC包头，生成第五数据包，MAC包头至少包括：第一传输序号SN和长度标识L。
发送模块22，用于在处理模块21生成第五数据包后，发送第五数据包至第一无线接入网设备。
可选的，第一包头还包括第二传输序号SN。
可选的，MAC包头还包括分段状态信息SS。
可选的，MAC包头还包括协议数据单元格式PDU type。
可以理解的是，本实施例的第一用户终端可对应于上述如图5的实施例的数据传输方法中的第一用户终端，并且本实施例的第一用户终端中的各个模块的划分和/或功能等均是为了实现如图5所示的方法流程，为了简洁，在此不再赘述。
可选地，作为本发明的另一个实施例，获取模块20的功能可以由接收器实现，处理模块21的功能可以由处理器实现，发送单元22的功能可以由发送器实现。其中，接收器和发送器可以集成在一个收发器内。
本发明实施例提供一种用户终端。基于上述实施例的描述，由于通信设备在获取第三数据包后，为第三数据包依次添加第一包头和媒体接入控制MAC包头，与现有的数据包经过PDCP层、RLC层、MAC层和PHY层时都会为数据包填充对应协议的包头的方案相比，至少省去了数据包经过RLC层时为数据包填充RLC包头的过程，降低了数据包包头所占用的空间，提高空口传输的效率。
本发明实施例提供一种核心网设备，如图10所示，核心网设备用于执行以上方法中的核心网设备所执行的步骤。核心网设备可以包括相应步骤所对应的模块。示例性的，可以包括获取模块30、处理模块31和发送模块32。
获取模块30，用于获取第三数据包，第三数据包至少包括净荷。
处理模块31，用于在获取模块30获取第三数据包后，为第三数据包添加第一包头，生成第四数据包，第一包头至少包括数据包标识PID。
发送模块32，用于在处理模块31生成第四数据包后，发送第四数据包至第二无线接入网设备。
可选的，第一包头还包括第二传输序号SN。
可以理解的是，本实施例的核心网设备可对应于上述如图5的实施例的数据传输方法中的核心网设备，并且本实施例的核心网设备中的各个模块的划分和/或功能等均是为了实现如图5所示的方法流程，为了简洁，在此不再赘述。
可选地，作为本发明的另一个实施例，获取模块30的功能可以由接收器实现，处理模块31的功能可以由处理器实现，发送单元32的功能可以由发送器实现。其中，接收器和发送器可以集成在一个收发器内。
本发明实施例提供一种核心网设备。基于上述实施例的描述，由于通信设备在获取第三数据包后，为第三数据包依次添加第一包头和媒体接入控制MAC包头，与现有的数据包经过PDCP层、RLC 层、MAC层和PHY层时都会为数据包填充对应协议的包头的方案相比，至少省去了数据包经过RLC层时为数据包填充RLC包头的过程，降低了数据包包头所占用的空间，提高空口传输的效率。
本发明实施例提供一种无线接入网设备，如图11所示，无线接入网设备为第二无线接入网设备，第二无线接入网设备用于执行以上方法中的第二无线接入网设备所执行的步骤。第二无线接入网设备可以包括相应步骤所对应的模块。示例性的，可以包括获取模块40、处理模块41和发送模块42。
获取模块40，用于获取核心网设备发送的第四数据包，第四数据包包括第三数据包和第一包头，第三数据包至少包括净荷，第一包头至少包括数据包标识PID。
处理模块41，用于在获取模块40获取核心网设备发送的第四数据包后，为第四数据包添加媒体接入控制MAC包头，生成第五数据包，MAC包头至少包括：第一传输序号SN和长度标识L。
发送模块42，用于在处理模块41生成第五数据包后，发送第五数据包至第二用户终端。
可选的，第一包头还包括第二传输序号SN。
可选的，MAC包头还包括分段状态信息SS。
可选的，MAC包头还包括协议数据单元格式PDU type。
可以理解的是，本实施例的第二无线接入网设备可对应于上述如图5的实施例的数据传输方法中的第二无线接入网设备，并且本实施例的第二无线接入网设备中的各个模块的划分和/或功能等均是为了实现如图5所示的方法流程，为了简洁，在此不再赘述。
可选地，作为本发明的另一个实施例，获取模块40的功能可以由接收器实现，处理模块41的功能可以由处理器实现，发送单元42的功能可以由发送器实现。其中，接收器和发送器可以集成在一个收发器内。
本发明实施例提供一种无线接入网设备。基于上述实施例的描 述，由于通信设备在获取第三数据包后，为第三数据包依次添加第一包头和媒体接入控制MAC包头，与现有的数据包经过PDCP层、RLC层、MAC层和PHY层时都会为数据包填充对应协议的包头的方案相比，至少省去了数据包经过RLC层时为数据包填充RLC包头的过程，降低了数据包包头所占用的空间，提高空口传输的效率。
本发明实施例提供一种通信设备，如图12所示，通信设备用于执行以上方法中的第一用户终端或者第二无线接入网设备所执行的步骤。通信设备可以包括相应步骤所对应的模块。示例性的，可以包括接收器50、处理器51和发送器52。
接收器50，用于获取第一数据包，第一数据包至少包括净荷。
处理器51，用于在接收器50获取第一数据包后，为第一数据包添加媒体接入控制MAC包头，生成第二数据包，MAC包头至少包括：第一传输序号SN、数据包标识PID和长度标识L。
发送器52，用于在处理器51生成第二数据包后，发送第二数据包。
可选的，通信设备为第一用户终端。
发送器52，具体用于在处理器51生成第二数据包后，发送第二数据包至第一无线接入网设备。
可选的，通信设备为第二无线接入网设备。
接收器50，具体用于获取核心网设备发送的第一数据包。
发送器52，具体用于在处理器51生成第二数据包后，发送第二数据包至第二用户终端。
可选的，MAC包头还包括分段状态信息SS。
可选的，MAC包头还包括协议数据单元格式PDU type。
可以理解的是，本实施例的通信设备可对应于上述如图3的实施例的数据传输方法中的通信设备，并且本实施例的通信设备中的各个模块的划分和/或功能等均是为了实现如图3所示的方法流程，为了简洁，在此不再赘述。
可选地，在实际的应用中，接收器50和发送器52可以集成在一个收发器内。
本发明法实施例提供一种通信设备。基于上述实施例的描述，由于通信设备在获取第一数据包后，为第一数据包依次添加第一数据包和媒体接入控制MAC包头，与现有的数据包经过PDCP层、RLC层、MAC层和PHY层时都会为数据包填充对应协议的包头的方案相比，至少省去了数据包经过RLC层时为数据包填充RLC包头的过程，降低了数据包包头所占用的空间，提高空口传输的效率。
本发明实施例提供一种用户终端，如图13所示，用户终端为第一用户终端，第一用户终端用于执行以上方法中的第一用户终端所执行的步骤。第一用户终端可以包括相应步骤所对应的模块。示例性的，可以包括接收器60、处理器61和发送器62。
接收器60，用于获取第三数据包，第三数据包至少包括净荷。
处理器61，用于在接收器60获取第三数据包后，为第三数据包添加第一包头，生成第四数据包，第一包头至少包括数据包标识PID；以及为第四数据包添加媒体接入控制MAC包头，生成第五数据包，MAC包头至少包括：第一传输序号SN和长度标识L。
发送器62，用于在处理器61生成第五数据包后，发送第五数据包至第一无线接入网设备。
可选的，第一包头还包括第二传输序号SN。
可选的，MAC包头还包括分段状态信息SS。
可选的，MAC包头还包括协议数据单元格式PDU type。
可以理解的是，本实施例的第一用户终端可对应于上述如图5的实施例的数据传输方法中的第一用户终端，并且本实施例的第一用户终端中的各个模块的划分和/或功能等均是为了实现如图5所示的方法流程，为了简洁，在此不再赘述。
可选地，在实际的应用中，接收器60和发送器62可以集成在一个收发器内。
本发明实施例提供一种用户终端。基于上述实施例的描述，由于通信设备在获取第三数据包后，为第三数据包依次添加第一包头和媒体接入控制MAC包头，与现有的数据包经过PDCP层、RLC层、MAC层和PHY层时都会为数据包填充对应协议的包头的方案相比，至少省去了数据包经过RLC层时为数据包填充RLC包头的过程，降低了数据包包头所占用的空间，提高空口传输的效率。
本发明实施例提供一种核心网设备，如图14所示，核心网设备用于执行以上方法中的核心网设备所执行的步骤。核心网设备可以包括相应步骤所对应的模块。示例性的，可以包括接收器70、处理器71和发送器72。
接收器70，用于获取第三数据包，第三数据包至少包括净荷。
处理器71，用于在接收器70获取第三数据包后，为第三数据包添加第一包头，生成第四数据包，第一包头至少包括数据包标识PID。
发送器72，用于在处理器71生成第四数据包后，发送第四数据包至第二无线接入网设备。
可选的，第一包头还包括第二传输序号SN。
可以理解的是，本实施例的核心网设备可对应于上述如图5的实施例的数据传输方法中的核心网设备，并且本实施例的核心网设备中的各个模块的划分和/或功能等均是为了实现如图5所示的方法流程，为了简洁，在此不再赘述。
可选地，在实际的应用中，接收器70和发送器72可以集成在一个收发器内。
本发明实施例提供一种核心网设备。基于上述实施例的描述，由于通信设备在获取第三数据包后，为第三数据包依次添加第一包头和媒体接入控制MAC包头，与现有的数据包经过PDCP层、RLC层、MAC层和PHY层时都会为数据包填充对应协议的包头的方案相比，至少省去了数据包经过RLC层时为数据包填充RLC包头的 过程，降低了数据包包头所占用的空间，提高空口传输的效率。
本发明实施例提供一种无线接入网设备，如图15所示，无线接入网设备为第二无线接入网设备，第二无线接入网设备用于执行以上方法中的第二无线接入网设备所执行的步骤。第二无线接入网设备可以包括相应步骤所对应的模块。示例性的，可以包括接收器80、处理器81和发送器82。
接收器80，用于获取核心网设备发送的第四数据包，第四数据包包括第三数据包和第一包头，第三数据包至少包括净荷，第一包头至少包括数据包标识PID。
处理器81，用于在接收器80获取核心网设备发送的第四数据包后，为第四数据包添加媒体接入控制MAC包头，生成第五数据包，MAC包头至少包括：第一传输序号SN和长度标识L。
发送器82，用于在处理器81生成第五数据包后，发送第五数据包至第二用户终端。
可选的，第一包头还包括第二传输序号SN。
可选的，MAC包头还包括分段状态信息SS。
可选的，MAC包头还包括协议数据单元格式PDU type。
可以理解的是，本实施例的第二无线接入网设备可对应于上述如图5的实施例的数据传输方法中的第二无线接入网设备，并且本实施例的第二无线接入网设备中的各个模块的划分和/或功能等均是为了实现如图5所示的方法流程，为了简洁，在此不再赘述。
可选地，在实际的应用中，接收器80和发送器82可以集成在一个收发器内。
本发明实施例提供一种无线接入网设备。基于上述实施例的描述，由于通信设备在获取第三数据包后，为第三数据包依次添加第一包头和媒体接入控制MAC包头，与现有的数据包经过PDCP层、RLC层、MAC层和PHY层时都会为数据包填充对应协议的包头的方案相比，至少省去了数据包经过RLC层时为数据包填充RLC包 头的过程，降低了数据包包头所占用的空间，提高空口传输的效率。
本发明实施例还提供一种用户终端，如图16所示，该终端包括：存储器90、处理器91、通信接口92和系统总线93。
存储器90、处理器91和通信接口92通过系统总线93连接，存储器90用于存储一些计算机指令，处理器91用于执行计算机指令，以使用户终端执行如图3或图5的数据传输方法。具体的数据传输方法可参见上述如图3或图5所示的实施例中的相关描述，此处不再赘述。
处理器91可以为中央处理器(central processing unit，CPU)。处理器91还可以为其他通用处理器、数字信号处理器(digital signal processing，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)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。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。
处理器91可以为专用处理器，该专用处理器可以包括基带处理芯片、射频处理芯片等中的至少一个。进一步地，该专用处理器还可以包括具有用户终端其他专用处理功能的芯片。
存储器90可以包括易失性存储器(volatile memory)，例如随机存取存储器(random-access memory，RAM)；存储器90也可以包括非易失性存储器(non-volatile memory)，例如只读存储器(read-only memory，ROM)，快闪存储器(flash memory)，硬盘(hard disk drive，HDD)或固态硬盘(solid-state drive，SSD)；存储器90还可以包括上述种类的存储器的组合。
系统总线93可以包括数据总线、电源总线、控制总线和信号状态总线等。本实施例中为了清楚说明，在图16中将各种总线都示意为系统总线93。
通信接口92可以包括接收器和发送器。并且在用户终端的具体 实现中，接收器和发送器具体可以是用户终端上的收发器。该收发器可以为无线收发器。例如，无线收发器可以是用户终端的空口等。处理器91通过收发器与其他设备，例如无线接入网设备之间进行数据的收发。
在具体实现过程中，上述如图3或图5所示的方法流程中的各步骤均可以通过硬件执行软件形式的计算机执行指令实现。为避免重复，此处不再赘述。
本发明实施例提供一种用户终端。基于上述实施例的描述，由于通信设备在获取第一数据包后，为第一数据包依次添加第一数据包和媒体接入控制MAC包头，与现有的数据包经过PDCP层、RLC层、MAC层和PHY层时都会为数据包填充对应协议的包头的方案相比，至少省去了数据包经过RLC层时为数据包填充RLC包头的过程，降低了数据包包头所占用的空间，提高空口传输的效率。
本发明实施例提供一种无线接入网设备，如图17所示，该无线接入网设备包括存储器100、处理器101、通信接口102和系统总线103。
存储器100、处理器101和通信接口102通过系统总线103连接，存储器100用于存储一些计算机指令，处理器101用于执行计算机指令，以使无线接入网设备执行如图3或图5的数据传输方法。具体的数据传输方法可参见上述如图3或图5所示的实施例中的相关描述，此处不再赘述。
处理器101可以为CPU。处理器101还可以为其他通用处理器、DSP、ASIC、FPGA或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。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。
处理器101可以为专用处理器，该专用处理器可以包括基带处理芯片、射频处理芯片等中的至少一个。进一步地，该专用处理器还可以包括具有无线接入网设备其他专用处理功能的芯片。
存储器100可以包括易失性存储器，例如RAM；存储器100也可以包括非易失性存储器，例如ROM，快闪存储器，HDD或SSD；存储器100还可以包括上述种类的存储器的组合。
系统总线103可以包括数据总线、电源总线、控制总线和信号状态总线等。本实施例中为了清楚说明，在图17中将各种总线都示意为系统总线103。
通信接口102可以包括接收器和发送器。并且在无线接入网设备的具体实现中，接收器和发送器具体可以是无线接入网设备上的收发器。该收发器可以为无线收发器。例如，无线收发器可以是无线接入网设备的天线、空口等。处理器101通过收发器与其他设备，例如核心网设备之间进行数据的收发。
在具体实现过程中，上述如图3或图5所示的方法流程中的各步骤均可以通过硬件执行软件形式的计算机执行指令实现。为避免重复，此处不再赘述。
本发明实施例提供一种无线接入网设备。基于上述实施例的描述，由于通信设备在获取第一数据包后，为第一数据包依次添加第一数据包和媒体接入控制MAC包头，与现有的数据包经过PDCP层、RLC层、MAC层和PHY层时都会为数据包填充对应协议的包头的方案相比，至少省去了数据包经过RLC层时为数据包填充RLC包头的过程，降低了数据包包头所占用的空间，提高空口传输的效率。
本发明实施例提供一种核心网设备，如图18所示，该核心网设备包括存储器110、处理器111、通信接口112和系统总线113。
存储器110、处理器111和通信接口112通过系统总线113连接，存储器110用于存储一些计算机指令，处理器111用于执行计算机指令，以使核心网设备执行如图3或图5的数据传输方法。具体的数据传输方法可参见上述如图3或图5所示的实施例中的相关描述，此处不再赘述。
处理器111可以为CPU。处理器111还可以为其他通用处理器、 DSP、ASIC、FPGA或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。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。
处理器111可以为专用处理器，该专用处理器可以包括基带处理芯片、射频处理芯片等中的至少一个。进一步地，该专用处理器还可以包括具有核心网设备其他专用处理功能的芯片。
存储器110可以包括易失性存储器，例如RAM；存储器110也可以包括非易失性存储器，例如ROM，快闪存储器，HDD或SSD；存储器110还可以包括上述种类的存储器的组合。
系统总线113可以包括数据总线、电源总线、控制总线和信号状态总线等。本实施例中为了清楚说明，在图18中将各种总线都示意为系统总线113。
通信接口112可以包括接收器和发送器。并且在核心网设备的具体实现中，接收器和发送器具体可以是核心网设备上的收发器。该收发器可以为无线收发器。例如，无线收发器可以是核心网设备的天线、空口等。处理器111通过收发器与其他设备，例如无线接入网设备之间进行数据的收发。
在具体实现过程中，上述如图3或图5所示的方法流程中的各步骤均可以通过硬件执行软件形式的计算机执行指令实现。为避免重复，此处不再赘述。
本发明实施例提供一种核心网设备。基于上述实施例的描述，由于通信设备在获取第一数据包后，为第一数据包依次添加第一数据包和媒体接入控制MAC包头，与现有的数据包经过PDCP层、RLC层、MAC层和PHY层时都会为数据包填充对应协议的包头的方案相比，至少省去了数据包经过RLC层时为数据包填充RLC包头的过程，降低了数据包包头所占用的空间，提高空口传输的效率。
本发明实施例提供一种数据传输系统，该系统包括用户终端、无线接入网设备和核心网设备。对于用户终端的描述具体可参见上 述如图16所示的实施例中对用户终端的相关描述，对于无线接入网设备的描述具体可参见上述如图17所示的实施例中对无线接入网设备的相关描述，对于核心网设备的描述具体可参见上述如图18所示的实施例中对核心网设备的相关描述，此处不再赘述。
本发明实施例提供的数据传输系统中，用户终端分别通过执行如图3或图5所示的方法流程中的相应步骤完成本发明实施例的数据传输方法；相应的，无线接入网设备通过执行如图3或图5所示的方法流程中的相应步骤完成本发明实施例的数据传输方法，核心网设备通过执行如图3或图5所示的方法流程中的相应步骤完成本发明实施例的数据传输方法。
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，仅以上述各功能模块的划分进行举例说明，实际应用中，可以根据需要而将上述功能分配由不同的功能模块完成，即将装置的内部结构划分成不同的功能模块，以完成以上描述的全部或者部分功能。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，所述模块或单元的划分，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，在本发明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。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
所述集成的单元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，本发明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全部或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)或处理器(processor)执行本发明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(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本发明的具体实施方式，但本发明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发明揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应所述以权利要求的保护范围为准。

Claims (49)

  1. 一种数据传输方法，其特征在于，包括：
    通信设备获取第一数据包，所述第一数据包至少包括净荷；
    所述通信设备为所述第一数据包添加媒体接入控制MAC包头，生成第二数据包，所述MAC包头至少包括：第一传输序号SN、数据包标识PID和长度标识L；
    所述通信设备发送所述第二数据包。
  2. 根据权利要求1所述的数据传输方法，其特征在于，所述通信设备为第一用户终端；
    所述通信设备发送所述第二数据包，具体包括：
    所述第一用户终端发送所述第二数据包至第一无线接入网设备。
  3. 根据权利要求1所述的数据传输方法，其特征在于，所述通信设备为第二无线接入网设备；
    所述通信设备获取第一数据包，具体包括：
    所述第二无线接入网设备获取核心网设备发送的所述第一数据包；
    所述通信设备发送所述第二数据包，具体包括：
    所述第二无线接入网设备发送所述第二数据包至第二用户终端。
  4. 根据权利要求1-3中任意一项所述的数据传输方法，其特征在于，所述MAC包头还包括分段状态信息SS。
  5. 根据权利要求1-4中任意一项所述的数据传输方法，其特征在于，所述MAC包头还包括协议数据单元格式PDU type。
  6. 一种数据传输方法，其特征在于，包括：
    第一用户终端获取第三数据包，所述第三数据包至少包括净荷；
    所述第一用户终端为所述第三数据包添加第一包头，生成第四数据包，所述第一包头至少包括数据包标识PID；
    所述第一用户终端为所述第四数据包添加媒体接入控制MAC包头，生成第五数据包，所述MAC包头至少包括：第一传输序号SN和长度标识L；
    所述第一用户终端发送所述第五数据包至第一无线接入网设备。
  7. 根据权利要求6所述的数据传输方法，其特征在于，所述第一包头还包括第二传输序号SN。
  8. 根据权利要求6或7所述的数据传输方法，其特征在于，所述MAC包头还包括分段状态信息SS。
  9. 根据权利要求6-8中任意一项所述的数据传输方法，其特征在于，所述MAC包头还包括协议数据单元格式PDU type。
  10. 一种数据传输方法，其特征在于，包括：
    核心网设备获取第三数据包，所述第三数据包至少包括净荷；
    所述核心网设备为所述第三数据包添加第一包头，生成第四数据包，所述第一包头至少包括数据包标识PID；
    所述核心网设备发送所述第四数据包至第二无线接入网设备。
  11. 根据权利要求10所述的数据传输方法，其特征在于，所述第一包头还包括第二传输序号SN。
  12. 一种数据传输方法，其特征在于，包括：
    第二无线接入网设备获取核心网设备发送的第四数据包，所述第四数据包包括第三数据包和第一包头，所述第三数据包至少包括净荷，所述第一包头至少包括数据包标识PID；
    所述第二无线接入网设备为所述第四数据包添加媒体接入控制MAC包头，生成第五数据包，所述MAC包头至少包括：第一传输序号SN和长度标识L；
    所述第二无线接入网设备发送所述第五数据包至第二用户终端。
  13. 根据权利要求12所述的数据传输方法，其特征在于，所述第一包头还包括第二传输序号SN。
  14. 根据权利要求12或13所述的数据传输方法，其特征在于，所述MAC包头还包括分段状态信息SS。
  15. 根据权利要求12-14中任意一项所述的数据传输方法，其特征在于，所述MAC包头还包括协议数据单元格式PDU type。
  16. 一种通信设备，其特征在于，所述通信设备包括获取模块、 处理模块和发送模块；
    所述获取模块，用于获取第一数据包，所述第一数据包至少包括净荷；
    所述处理模块，用于在所述获取模块获取第一数据包后，为所述第一数据包添加媒体接入控制MAC包头，生成第二数据包，所述MAC包头至少包括：第一传输序号SN、数据包标识PID和长度标识L；
    所述发送模块，用于在所述处理模块生成所述第二数据包后，发送所述第二数据包。
  17. 根据权利要求16所述的设备，其特征在于，所述通信设备为第一用户终端；
    所述发送模块，具体用于在所述处理模块生成所述第二数据包后，发送所述第二数据包至第一无线接入网设备。
  18. 根据权利要求16所述的设备，其特征在于，所述通信设备为第二无线接入网设备；
    所述获取模块，具体用于获取核心网设备发送的所述第一数据包；
    所述发送模块，具体用于在所述处理模块生成所述第二数据包后，发送所述第二数据包至第二用户终端。
  19. 根据权利要求16-18中任意一项所述的设备，其特征在于，所述MAC包头还包括分段状态信息SS。
  20. 根据权利要求16-19中任意一项所述的设备，其特征在于，所述MAC包头还包括协议数据单元格式PDU type。
  21. 一种用户终端，其特征在于，所述用户终端为第一用户终端，所述第一用户终端包括获取模块、处理模块和发送模块；
    所述获取模块，用于获取第三数据包，所述第三数据包至少包括净荷；
    所述处理模块，用于在所述获取模块获取第三数据包后，为所述第三数据包添加第一包头，生成第四数据包，所述第一包头至少包括 数据包标识PID；以及为所述第四数据包添加媒体接入控制MAC包头，生成第五数据包，所述MAC包头至少包括：第一传输序号SN和长度标识L；
    所述发送模块，用于在所述处理模块生成第五数据包后，发送所述第五数据包至第一无线接入网设备。
  22. 根据权利要求21所述的用户终端，其特征在于，所述第一包头还包括第二传输序号SN。
  23. 根据权利要求21或22所述的用户终端，其特征在于，所述MAC包头还包括分段状态信息SS。
  24. 根据权利要求21-23中任意一项所述的用户终端，其特征在于，所述MAC包头还包括协议数据单元格式PDU type。
  25. 一种核心网设备，其特征在于，所述核心网设备包括获取模块、处理模块和发送模块；
    所述获取模块，用于获取第三数据包，所述第三数据包至少包括净荷；
    所述处理模块，用于在所述获取模块获取第三数据包后，为所述第三数据包添加第一包头，生成第四数据包，所述第一包头至少包括数据包标识PID；
    所述发送模块，用于在所述处理模块生成第四数据包后，发送所述第四数据包至第二无线接入网设备。
  26. 根据权利要求25所述的核心网设备，其特征在于，所述第一包头还包括第二传输序号SN。
  27. 一种无线接入网设备，其特征在于，所述无线接入网设备为第二无线接入网设备，所述第二无线接入网设备包括获取模块、处理模块和发送模块；
    所述获取模块，用于获取核心网设备发送的第四数据包，所述第四数据包包括第三数据包和第一包头，所述第三数据包至少包括净荷，所述第一包头至少包括数据包标识PID；
    所述处理模块，用于在所述获取模块获取核心网设备发送的第四 数据包后，为所述第四数据包添加媒体接入控制MAC包头，生成第五数据包，所述MAC包头至少包括：第一传输序号SN和长度标识L；
    所述发送模块，用于在所述处理模块生成第五数据包后，发送所述第五数据包至第二用户终端。
  28. 根据权利要求27所述的无线接入网设备，其特征在于，所述第一包头还包括第二传输序号SN。
  29. 根据权利要求27或28所述的无线接入网设备，其特征在于，所述MAC包头还包括分段状态信息SS。
  30. 根据权利要求27-29中任意一项所述的无线接入网设备，其特征在于，所述MAC包头还包括协议数据单元格式PDU type。
  31. 一种通信设备，其特征在于，所述通信设备包括接收器、处理器和发送器；
    所述接收器，用于获取第一数据包，所述第一数据包至少包括净荷；
    所述处理器，用于在所述接收器获取第一数据包后，为所述第一数据包添加媒体接入控制MAC包头，生成第二数据包，所述MAC包头至少包括：第一传输序号SN、数据包标识PID和长度标识L；
    所述发送器，用于在所述处理器生成所述第二数据包后，发送所述第二数据包。
  32. 根据权利要求31所述的设备，其特征在于，所述通信设备为第一用户终端；
    所述发送器，具体用于在所述处理器生成所述第二数据包后，发送所述第二数据包至第一无线接入网设备。
  33. 根据权利要求31所述的设备，其特征在于，所述通信设备为第二无线接入网设备；
    所述接收器，具体用于获取核心网设备发送的所述第一数据包；
    所述发送器，具体用于在所述处理器生成所述第二数据包后，发送所述第二数据包至第二用户终端。
  34. 根据权利要求31-33中任意一项所述的设备，其特征在于， 所述MAC包头还包括分段状态信息SS。
  35. 根据权利要求31-34中任意一项所述的设备，其特征在于，所述MAC包头还包括协议数据单元格式PDU type。
  36. 一种用户终端，其特征在于，所述用户终端为第一用户终端，所述第一用户终端包括接收器、处理器和发送器；
    所述接收器，用于获取第三数据包，所述第三数据包至少包括净荷；
    所述处理器，用于在所述接收器获取第三数据包后，为所述第三数据包添加第一包头，生成第四数据包，所述第一包头至少包括数据包标识PID；以及为所述第四数据包添加媒体接入控制MAC包头，生成第五数据包，所述MAC包头至少包括：第一传输序号SN和长度标识L；
    所述发送器，用于在所述处理器生成第五数据包后，发送所述第五数据包至第一无线接入网设备。
  37. 根据权利要求36所述的用户终端，其特征在于，所述第一包头还包括第二传输序号SN。
  38. 根据权利要求36或37所述的用户终端，其特征在于，所述MAC包头还包括分段状态信息SS。
  39. 根据权利要求36-38中任意一项所述的用户终端，其特征在于，所述MAC包头还包括协议数据单元格式PDU type。
  40. 一种核心网设备，其特征在于，所述核心网设备包括接收器、处理器和发送器；
    所述接收器，用于获取第三数据包，所述第三数据包至少包括净荷；
    所述处理器，用于在所述接收器获取第三数据包后，为所述第三数据包添加第一包头，生成第四数据包，所述第一包头至少包括数据包标识PID；
    所述发送器，用于在所述处理器生成第四数据包后，发送所述第四数据包至第二无线接入网设备。
  41. 根据权利要求40所述的核心网设备，其特征在于，所述第一包头还包括第二传输序号SN。
  42. 一种无线接入网设备，其特征在于，所述无线接入网设备为第二无线接入网设备，所述第二无线接入网设备包括接收器、处理器和发送器；
    所述接收器，用于获取核心网设备发送的第四数据包，所述第四数据包包括第三数据包和第一包头，所述第三数据包至少包括净荷，所述第一包头至少包括数据包标识PID；
    所述处理器，用于在所述接收器获取核心网设备发送的第四数据包后，为所述第四数据包添加媒体接入控制MAC包头，生成第五数据包，所述MAC包头至少包括：第一传输序号SN和长度标识L；
    所述发送器，用于在所述处理器生成第五数据包后，发送所述第五数据包至第二用户终端。
  43. 根据权利要求42所述的无线接入网设备，其特征在于，所述第一包头还包括第二传输序号SN。
  44. 根据权利要求42或43所述的无线接入网设备，其特征在于，所述MAC包头还包括分段状态信息SS。
  45. 根据权利要求42-44中任意一项所述的无线接入网设备，其特征在于，所述MAC包头还包括协议数据单元格式PDU type。
  46. 一种用户终端，其特征在于，所述用户终端包括存储器、处理器、通信接口和系统总线；
    所述存储器、所述处理器和所述通信接口通过所述系统总线连接，所述存储器用于存储计算机指令，所述处理器用于执行所述存储器存储的计算机指令，以使所述用户终端执行如权利要求1-9中任意一项所述的数据传输方法。
  47. 一种无线接入网设备，其特征在于，所述无线接入网设备包括存储器、处理器、通信接口和系统总线；
    所述存储器、所述处理器和所述通信接口通过所述系统总线连接，所述存储器用于存储计算机指令，所述处理器用于执行所述存储 器存储的计算机指令，以使所述无线接入网设备执行如权利要求1-5、12-15任意一项所述的数据传输方法。
  48. 一种核心网设备，其特征在于，所述核心网设备包括存储器、处理器、通信接口和系统总线；
    所述存储器、所述处理器和所述通信接口通过所述系统总线连接，所述存储器用于存储计算机指令，所述处理器用于执行所述存储器存储的计算机指令，以使所述核心网设备执行如权利要求10或11所述的数据传输方法。
  49. 一种数据传输系统，其特征在于，包括具有如权利要求46所述的用户终端，具有如权利要求47所述的无线接入网设备，以及具有如权利要求48所述的核心网设备。
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