CN113438297A - Data transmission method, device, network element equipment and computer readable storage medium - Google Patents
Data transmission method, device, network element equipment and computer readable storage medium Download PDFInfo
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- CN113438297A CN113438297A CN202110692629.7A CN202110692629A CN113438297A CN 113438297 A CN113438297 A CN 113438297A CN 202110692629 A CN202110692629 A CN 202110692629A CN 113438297 A CN113438297 A CN 113438297A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/50—Network services
- H04L67/56—Provisioning of proxy services
- H04L67/565—Conversion or adaptation of application format or content
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W92/00—Interfaces specially adapted for wireless communication networks
- H04W92/04—Interfaces between hierarchically different network devices
- H04W92/10—Interfaces between hierarchically different network devices between terminal device and access point, i.e. wireless air interface
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Abstract
The application relates to a data transmission method, a data transmission device, network element equipment and a computer readable storage medium. The method comprises the following steps: receiving a transmission data packet aiming at the data service; if the transmission data packet is an uplink air interface data packet, acquiring a target uplink network data packet based on the uplink air interface data packet, and sending the target uplink network data packet to a centralized unit, wherein the target uplink network data packet is used for the centralized unit to send network transmission data to a network server based on the target uplink network data packet; and if the transmission data packet is a downlink network data packet, acquiring a target downlink air interface data packet based on the downlink network data packet, and sending air interface transmission data to a terminal based on the target downlink air interface data packet. By adopting the method, the coverage capability of the 5G mobile communication system can be improved.
Description
Technical Field
The present application relates to the field of mobile communications technologies, and in particular, to a data transmission method, an apparatus, a network element device, and a computer-readable storage medium.
Background
The fifth generation mobile communication technology (5G) is the highest peak of the current mobile communication technology development, and a terminal access base station, a base station connection core network, a core network connection internet, and a loop are buckled to form a whole set of 5G mobile communication system architecture.
In the 5G background, with the greatly increased data transmission rate, the demand of data services for users is increasing in addition to voice services, for example, users often need to watch videos, listen to music, and the like based on data traffic.
However, data transmission of data services is required to depend on a core network, and the coverage capability of the 5G mobile communication system is still to be improved in the face of more and more data service requirements.
Disclosure of Invention
In view of the foregoing, it is necessary to provide a data transmission method, an apparatus, a network element device and a computer-readable storage medium, which can improve the coverage capability of a 5G mobile communication system.
In a first aspect, an embodiment of the present application provides a data transmission method, where the method is used for a network element device, and the method includes:
receiving a transmission data packet aiming at the data service;
if the transmission data packet is an uplink air interface data packet, acquiring a target uplink network data packet based on the uplink air interface data packet, and sending the target uplink network data packet to a centralized unit, wherein the target uplink network data packet is used for the centralized unit to send network transmission data to a network server based on the target uplink network data packet;
and if the transmission data packet is a downlink network data packet, acquiring a target downlink air interface data packet based on the downlink network data packet, and sending air interface transmission data to the terminal based on the target downlink air interface data packet.
In a second aspect, an embodiment of the present application provides a data transmission apparatus, which is disposed in a network element device, and includes:
a receiving module, configured to receive a transmission data packet for a data service;
a first transmission module, configured to, if the transmission data packet is an uplink air interface data packet, obtain a target uplink network data packet based on the uplink air interface data packet, and send the target uplink network data packet to a central unit, where the target uplink network data packet is used by the central unit to send network transmission data to a network server based on the target uplink network data packet;
and the second transmission module is used for acquiring a target downlink air interface data packet based on the downlink network data packet and sending air interface transmission data to the terminal based on the target downlink air interface data packet if the transmission data packet is a downlink network data packet.
In a third aspect, an embodiment of the present application provides a network element device, which includes a memory and a processor, where the memory stores a computer program, and the processor implements the steps of the method according to the first aspect when executing the computer program.
In a fourth aspect, embodiments of the present application provide a computer-readable storage medium, on which a computer program is stored, which, when executed by a processor, implements the steps of the method according to the first aspect as described above.
The beneficial effects brought by the technical scheme provided by the embodiment of the application at least comprise:
the data transmission method, the data transmission device, the network element equipment and the computer readable storage medium are used for receiving the transmission data packet aiming at the data service; if the transmission data packet is an uplink air interface data packet, acquiring a target uplink network data packet based on the uplink air interface data packet, and sending the target uplink network data packet to the centralized unit, wherein the target uplink network data packet is used for the centralized unit to send network transmission data to the network server based on the target uplink network data packet; if the transmission data packet is a downlink network data packet, acquiring a target downlink air interface data packet based on the downlink network data packet, and sending air interface transmission data to the terminal based on the target downlink air interface data packet, it can be seen that, for the transmission data packet of the data service in the embodiment of the present application, the network element device performs conversion between the air interface data and the network data on the transmission data packet, and the converted transmission data packet can be directly transmitted between the terminal and the network server without depending on a core network for transmission, so that the coverage capability of the mobile communication system, especially the 5G mobile communication system, especially the coverage capability for the data service is greatly improved.
Drawings
FIG. 1-a is a diagram of an exemplary data transmission method;
FIG. 1-b is a diagram of an application environment of a data transmission method in another embodiment;
FIG. 2 is a flow diagram illustrating a method for data transmission according to one embodiment;
fig. 3 is a schematic flow chart illustrating obtaining a target uplink network data packet based on an uplink air interface data packet in an embodiment;
fig. 4 is a schematic flow chart illustrating a process of acquiring a target uplink network data packet based on an uplink air interface data packet in another embodiment;
fig. 5 is a schematic flow chart illustrating a process of acquiring a target downlink air interface data packet based on a downlink network data packet in an embodiment;
fig. 6 is a flowchart illustrating a process of determining a private network destination address corresponding to a downlink network packet in an embodiment;
FIG. 7 is a block diagram showing the structure of a data transmission apparatus according to an embodiment;
fig. 8 is an internal structural diagram of a network element device in an embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
In the 5G mobile communication system, the system architecture is that a terminal is accessed to a base station, the base station is connected with a core network, and the core network is connected with the Internet. With the increase of data transmission rate, in addition to voice service, the data service of users is more and more required, for example, users often need to watch videos, listen to music, etc. based on data traffic.
However, at present, data transmission of data services all depends on a core network, and the coverage capability of the 5G mobile communication system is still to be improved in the face of more and more data service requirements.
In view of this, an embodiment of the present application provides a data transmission method, in which a transmission data packet for a data service is received; if the transmission data packet is an uplink air interface data packet, acquiring a target uplink network data packet based on the uplink air interface data packet, and sending the target uplink network data packet to the centralized unit, wherein the target uplink network data packet is used for the centralized unit to send network transmission data to the network server based on the target uplink network data packet; if the transmission data packet is a downlink network data packet, acquiring a target downlink air interface data packet based on the downlink network data packet, and sending air interface transmission data to the terminal based on the target downlink air interface data packet.
In the following, a brief description will be given of an implementation environment related to the data transmission method provided in the embodiment of the present application.
Alternatively, as shown in fig. 1-a, the implementation environment may include a network element device 101, a Centralized Unit (CU) 102, a network server 103, a Distributed Unit (DU) 104, and a terminal 105. The number of distribution units 104 may be multiple (fig. 1-a only exemplarily shows one distribution unit 104), and multiple distribution units 104 each communicate with the network element device 101 through a network.
In the implementation environment shown in fig. 1-a, the network element device 101 may receive a transmission data packet for a data service; if the transmission data packet is an uplink air interface data packet sent by the distribution unit 104, the network element device 101 obtains a target uplink network data packet based on the uplink air interface data packet, and the network element device 101 can send the target uplink network data packet to the central unit 102, where the target uplink network data packet is used for the central unit 102 to send network transmission data to the network server 103 based on the target uplink network data packet; if the transmission data packet is a downlink network data packet sent by the central unit 102, the network element device 101 acquires a target downlink air interface data packet based on the downlink network data packet, and the network element device 101 sends air interface transmission data to the terminal 105 based on the target downlink air interface data packet. The network element device 101 may send the target downlink air interface data packet to the distribution unit 104, where the distribution unit 104 processes the target downlink air interface data packet to obtain air interface transmission data, and then the distribution unit 104 sends the air interface transmission data to the terminal 105.
Optionally, as shown in fig. 1-b, the implementation environment may further include a network element device 101, a Centralized Unit (CU) 102, a network server 103, and a terminal 105, where the network element device 101 may be a distributed Unit.
In the implementation environment shown in fig. 1-b, the network element device 101 may receive a transmission data packet for a data service; if the transmission data packet is an uplink air interface data packet, the network element device 101 acquires a target uplink network data packet based on the uplink air interface data packet, the network element device 101 sends the target uplink network data packet to the central unit 102, and the target uplink network data packet is used for the central unit 102 to send network transmission data to the network server 103 based on the target uplink network data packet; if the transmission data packet is a downlink network data packet, the network element device 101 acquires a target downlink air interface data packet based on the downlink network data packet, and sends air interface transmission data to the terminal 105 based on the target downlink air interface data packet. The network element device 101 may process the target downlink air interface data to obtain air interface transmission data, and then send the air interface transmission data to the terminal 105.
In one embodiment, as shown in fig. 2, a data transmission method is provided, which is described by taking the method as an example applied to the network element device 101 in fig. 1-a, and the method includes step 201, step 202, and step 203:
in step 201, a network element device receives a transmission data packet for a data service.
In a 5G mobile communication system, a BBU (Building Base band unit) is split into a central unit CU and a distribution unit DU, a physical bottom layer in the BBU is sunk, a physical upper layer, a MAC (Media Access Control) layer, and an RLC (Radio Link Control) layer, which have high requirements for real-time performance, are placed in the distribution unit for processing, and a PDCP (Packet Data Convergence Protocol) layer and an RRC (Radio Resource Control) layer, which have low requirements for real-time performance, are placed in the central unit for processing.
In this embodiment, the network element device may be deployed between the distribution unit and the concentration unit, and the network element device may be, for example, an MEC (Mobile Edge Computing) server. Optionally, the central unit may set a public Network IP (Internet Protocol) Address of the Network element device as an Address of a gateway carried by F1 of the central unit, so that the Network element device, as the gateway, may converge data of the distribution unit and perform NAT (Network Address Translation) proxy to directly provide a networking service.
In a possible implementation manner, the central unit may be deployed in a public network, the distribution unit may be deployed in an intranet within a configuration range of the network element device, and the network element device may perform network address translation or reverse network address translation on a transmission data packet between the central unit and the distribution unit.
In this embodiment, the data service may be other mobile communication services except a voice service, for example, an audio/video service, and after receiving a transmission data packet for the data service, the network element device determines that the transmission data packet is an uplink air interface data packet or a downlink network data packet.
Optionally, if the transmission data packet is sent by a certain distribution unit, the network element device determines that the transmission data packet is an uplink air interface data packet. If the transmission data packet is sent by the centralized unit, the network element equipment determines that the transmission data packet is a downlink network data packet.
In this embodiment of the present application, in the uplink data transmission process, after receiving air interface data of a terminal, a distribution unit performs corresponding processing on the air interface data to obtain an uplink air interface data packet, and sends the uplink air interface data packet to an address of an F1 bearer gateway, so that a network element device receives the uplink air interface data packet sent by the distribution unit.
The network element equipment performs network address conversion and other processing on the uplink air interface data to obtain a target uplink network data packet, so that the uplink air interface data packet sent by the distribution unit in the intranet can be converted into the target uplink network data packet to be transmitted in the public network, the network element equipment can send the processed target uplink network data packet to the centralized unit, and the target uplink network data packet is used for the centralized unit to send network transmission data to the network server based on the target uplink network data packet.
The network server may be an internet server for providing data services in the internet, and the central unit may process the target uplink network data packet accordingly to obtain network transmission data, and send the network transmission data to the network server for data exchange with the network server.
In step 203, if the transmission data packet is a downlink network data packet, the network element device obtains a target downlink air interface data packet based on the downlink network data packet, and sends air interface transmission data to the terminal based on the target downlink air interface data packet.
In the downlink data transmission process, after receiving the network data of the network server, the central unit performs corresponding processing on the network data to obtain a downlink network data packet, and sends the downlink network data packet to the address of the F1 bearer gateway, so that the network element device receives the downlink network data packet sent by the central unit.
The network element equipment performs processing such as reverse network address conversion on downlink network data to obtain a target downlink air interface data packet, so that the downlink network data packet sent by the central unit in the public network can be converted into the target downlink air interface data packet to be transmitted in the internal network, the network element equipment sends the processed target downlink air interface data to the distribution unit, the distribution unit correspondingly processes the target downlink air interface data packet to obtain air interface transmission data, and the distribution unit sends the air interface transmission data to the terminal through the corresponding antenna unit.
In a possible embodiment, the functions of the network element device may also be implemented by a distribution unit. In the following, the above implementation process is briefly described by taking the network element device as a distribution unit as an example.
The network element device obtains a transmission data packet for the data service, and optionally, if the transmission data packet is output by an RLC layer of the network element device, the network element device determines that the transmission data packet is an uplink air interface data packet. If the transmission data packet is sent by the centralized unit, the network element equipment determines that the transmission data packet is a downlink network data packet.
On the one hand, if the transmission data packet is an uplink air interface data packet, the network element equipment acquires a target uplink network data packet based on the uplink air interface data packet and sends the target uplink network data packet to the centralized unit.
The network element equipment performs network address conversion and other processing on the uplink air interface data to obtain a target uplink network data packet, so that the uplink air interface data packet in the intranet can be converted into the target uplink network data packet to be transmitted in the public network, the network element equipment sends the target uplink network data packet obtained through processing to the centralized unit, and the target uplink network data packet is used for the centralized unit to send network transmission data to the network server based on the target uplink network data packet.
On the other hand, if the transmission data packet is a downlink network data packet, the network element device obtains a target downlink air interface data packet based on the downlink network data packet, and sends air interface transmission data to the terminal based on the target downlink air interface data packet.
In the process of downlink data transmission, after receiving network data of a network server, the central unit performs corresponding processing on the network data to obtain a downlink network data packet, and sends the downlink network data packet to network element equipment.
The network element equipment performs processing such as reverse network address conversion on the downlink network data to obtain a target downlink air interface data packet, so that the downlink network data packet of the public network can be converted into the target downlink air interface data packet to be transmitted in the internal network, the network element equipment can also perform corresponding processing on the target downlink air interface data packet through protocol layers such as an MAC (media access control) layer and an RLC (radio link control) layer in the network element equipment to obtain air interface transmission data, and the network element equipment sends the air interface transmission data to the terminal through a corresponding antenna unit.
In this way, the function of the network element device can also be realized by the distribution unit, for the transmission data packet of the data service, the network element device performs the conversion between the air interface data and the network data to the transmission data packet, and the converted transmission data packet can be directly transmitted between the terminal and the network server without depending on the core network for transmission, thereby greatly improving the coverage capability of the 5G mobile communication system, especially the coverage capability for the data service.
In a possible implementation manner, before receiving a transmission data packet for a data service, the central unit may further perform encryption by closing an air interface, and the distribution unit requests and establishes an IPsec (IP Security) Security tunnel from the central unit to ensure information data Security, so that the network element device may receive the transmission data packet through the Security tunnel between the network element device and the central unit. Data transmission between the distribution unit and the network element equipment and between the network element equipment and the centralized unit is protected by IPsec network encryption, and safety of intermediate transmission is guaranteed. Data transmission between the distribution unit and the network element equipment and between the network element equipment and the centralized unit does not adopt an encryption mode for transmission, so that the requirement on the equipment performance is not high, and the cost is reduced.
The above embodiments are implemented by receiving a transmission data packet for a data service; if the transmission data packet is an uplink air interface data packet, acquiring a target uplink network data packet based on the uplink air interface data packet, and sending the target uplink network data packet to the centralized unit, wherein the target uplink network data packet is used for the centralized unit to send network transmission data to the network server based on the target uplink network data packet; if the transmission data packet is a downlink network data packet, acquiring a target downlink air interface data packet based on the downlink network data packet, and sending air interface transmission data to the terminal based on the target downlink air interface data packet.
In an embodiment, based on the embodiment shown in fig. 2, referring to fig. 3, this embodiment relates to a process of how a network element device obtains a target uplink network data packet based on an uplink air interface data packet. As shown in fig. 3, the process may include steps 301 and 302:
In the uplink Data transmission process, after receiving the air interface Data of the terminal, the distribution unit performs corresponding processing on the air interface Data, for example, adds GTP (GPRS tunneling Protocol)/SDAP (Service Data Adaptation Protocol)/PDCP (Packet Data Convergence Protocol) header information to the air interface Data, so as to obtain an uplink air interface Data Packet. And the distribution unit sends the uplink air interface data packet to the network element equipment.
After receiving the uplink air interface data packet, the network element equipment identifies target air interface head information through a head information field in the uplink air interface data packet, wherein the target air interface head information is GTP/SDAP/PDCP head information, and the network element equipment removes the target air interface head information from the uplink air interface data packet to obtain the uplink network data packet.
Thus, the network element device removes the target air interface header information, and obtains an IP data packet, that is, an uplink network data packet, and the network element device further processes the IP data packet, for example, performs network address conversion processing, and obtains a target uplink network data packet.
In a possible implementation manner, the uplink network data packet includes a private network source address, where the private network source address may be a private network IP (Internet Protocol) address and a private network port number of a distribution unit that sends the uplink air interface data packet, and after the network element device removes target air interface header information from the uplink air interface data packet and obtains the uplink network data packet, the network element device may further store the target air interface header information and the private network source address as a mapping relation record in a first mapping relation database, where the first mapping relation database is used for the network element device to search for air interface header information corresponding to the private network address according to the private network address.
In this way, during the downlink data transmission process, the network element device may search the empty port header information corresponding to the private network address according to the private network address, and encapsulate the searched empty port header information in the corresponding downlink empty port data packet to keep the data complete.
Similar to the above described embodiments, the functionality of the network element device may also be implemented by a distribution unit. Hereinafter, taking the network element device as a distribution unit as an example, a process of acquiring a target uplink network data packet based on an uplink air interface data packet is briefly described.
Firstly, the network element equipment identifies the target empty port head information of the uplink empty port data packet, and removes the target empty port head information from the uplink empty port data packet to obtain the uplink network data packet.
In the uplink data transmission process, after receiving the air interface data of the terminal as a distribution unit, the network element device performs corresponding processing on the air interface data, for example, adds GTP/SDAP/PDCP header information to the air interface data, to obtain an uplink air interface data packet.
After the network element equipment acquires an uplink air interface data packet output by an RLC layer of the network element equipment, target air interface head information is identified through a head information field in the uplink air interface data packet, wherein the target air interface head information is GTP/SDAP/PDCP head information for example, and the network element equipment removes the target air interface head information from the uplink air interface data packet to obtain an uplink network data packet.
Then, the network element device obtains the target uplink network data packet based on the uplink network data packet, and the process of obtaining the target uplink network data packet based on the uplink network data packet by the network element device may refer to the implementation process of step 302, which is not described herein again.
Thus, the network element device in the embodiment of the present application identifies the target air interface header information of the uplink air interface data packet, and removes the target air interface header information from the uplink air interface data packet to obtain the uplink network data packet, thereby obtaining the IP data packet, and performs transmission based on the IP data packet, so that the distribution unit and the concentration unit may not depend on the core network, which is beneficial to improving the coverage capability of the mobile communication system.
In an embodiment, based on the embodiment shown in fig. 3, referring to fig. 4, this embodiment relates to a process of how a network element device obtains a target uplink network packet based on an uplink network packet. As illustrated in fig. 4, step 302 may include step 3021:
In this embodiment, the uplink network data packet includes a private network source address, where the private network source address may be a private network IP address and a private network port number of a distribution unit that sends the uplink air interface data packet, and the network element device performs network address conversion on the uplink network data packet, and may convert the private network source address in the uplink network data packet into a public network address according to the public network address of the network element device, that is, convert the uplink network data packet in the private network into a target uplink network data packet that can be transmitted in the public network.
In one possible implementation manner of step 3021, the private network source address includes a private network source IP address and private network source port information, the public network address includes a public network IP address and target public network port information of a port that receives the uplink empty port packet, and the network element device may replace the private network source IP address in the uplink network packet with the public network IP address and replace the private network source port information in the uplink network packet with the target public network port information to obtain the target uplink network packet, so as to implement the process of step 3021.
Optionally, the network element device may further store the private network source IP address, the private network source port information, and the target public network port information as a mapping relationship record in a second mapping relationship database, where the second mapping relationship database is used for the network element device to search the private network IP address and the private network port information corresponding to the public network port information according to the public network port information.
Therefore, in the downlink data transmission process, the network element device can find out the private network IP address and the private network port information corresponding to the downlink network data packet according to the public network port information of the received downlink network data packet so as to perform reverse network address conversion on the downlink network data packet.
Similar to the above described embodiments, the functionality of the network element device may also be implemented by a distribution unit. In the case that the network element device is a distribution unit, the process of the network element device obtaining the target uplink network data packet based on the uplink network data packet is similar to the embodiment shown in fig. 4, and is not described herein again.
According to the embodiment of the application, the network element equipment realizes data convergence, data of a large-flow data service is guided to the network element equipment of a public network, pressure is reduced for a centralized unit, data processing efficiency is improved, broadband access to 5G coverage equipment is realized, flattened networking access service is directly provided, the direction of convergence is widened and shunted, and more new directions are provided for popularization of 5G deep coverage.
In an embodiment, based on the embodiment shown in fig. 2, referring to fig. 5, this embodiment relates to how a network element device obtains a target downlink air interface data packet based on a downlink network data packet. As shown in fig. 5, the process may include steps 501 and 502:
In this embodiment, the downlink network packet includes a public network address of the network element device, and the network element device performs reverse network address conversion processing on the public network address to obtain a downlink air interface packet.
Specifically, first, the network element device determines a private network destination address corresponding to a downlink network packet, that is, to which distribution unit the downlink network packet needs to be sent. Hereinafter, a process of the network element device determining a private network destination address corresponding to the downlink network packet will be described.
Referring to fig. 6, the network element device may execute step 601 and step 602 shown in fig. 6 to implement a process of determining a private network destination address corresponding to a downlink network data packet:
The second mapping relation database can store a plurality of mapping relation records, each mapping relation record is the mapping relation of a private network IP address, private network port information and public network port information, and therefore the network element equipment can find a private network target address corresponding to the target public network port information according to the target public network port information of the port and the port number of the port of the target public network port information, and the private network target address comprises a private network target IP address and private network target port information.
After the network element equipment determines a private network target address corresponding to the downlink network data packet, a public network address in the downlink network data packet is converted into a private network target address according to the private network target address, and a downlink air interface data packet is obtained. The following introduces a process in which the network element device converts a public network address in a downlink network packet into a private network destination address according to the private network destination address to obtain a downlink air interface packet.
In this embodiment, the public network address includes a public network IP address and target public network port information, and the network element device may replace the public network IP address in the downlink network data packet with a private network target IP address, and replace the target public network port information in the downlink network data packet with the private network target port information, so as to obtain the downlink air interface data packet.
In this embodiment of the present application, in the uplink data transmission process, after receiving air interface data of a terminal, a distribution unit performs corresponding processing on the air interface data, for example, adds GTP/SDAP/PDCP header information to the air interface data, to obtain an uplink air interface data packet. After receiving the uplink air interface data packet, the network element equipment identifies target air interface head information through a head information field in the uplink air interface data packet, wherein the target air interface head information is GTP/SDAP/PDCP head information, and the network element equipment removes the target air interface head information from the uplink air interface data packet.
Conversely, in the downlink data transmission process, the network element device needs to encapsulate the target air interface header information into the downlink air interface data packet to obtain the target air interface header information, and then can send air interface transmission data to the terminal based on the target downlink air interface data packet.
In a possible implementation manner, the network element device may search, according to a private network target IP address included in the private network target address, target air interface header information corresponding to the private network target IP address in the first mapping relationship database. The first mapping relation database comprises corresponding relations between the head information of each air interface and each private network address, and is established by the network element equipment in the uplink data transmission process.
After the network element equipment finds out the target air interface head information corresponding to the private network target IP address, the downlink air interface data packet is packaged with the target air interface head information to obtain the target air interface head information.
In this way, a downlink network data packet sent by the central unit in the public network may be converted into a target downlink air interface data packet to be transmitted in the internal network, the network element device sends the processed target downlink air interface data to the distribution unit, the distribution unit correspondingly processes the target downlink air interface data packet to obtain air interface transmission data, and the distribution unit sends the air interface transmission data to the terminal through the corresponding antenna unit.
Similar to the above described embodiments, the functionality of the network element device may also be implemented by a distribution unit. Hereinafter, taking the network element device as a distribution unit as an example, a process of how the network element device obtains a target downlink air interface data packet based on a downlink network data packet is briefly described.
Firstly, the network element equipment determines a private network target address corresponding to a downlink network data packet, and converts a public network address in the downlink network data packet into a private network target address according to the private network target address to obtain a downlink air interface data packet.
The network element device determines a private network destination address corresponding to the downlink network packet, that is, to which distribution unit the downlink network packet needs to be sent, where the distribution unit may be the network element device itself or another distribution unit.
After the network element device determines a private network target address corresponding to the downlink network data packet, in this embodiment of the application, the private network target address includes a private network target IP address and private network target port information, and the public network address includes a public network IP address and target public network port information, and the network element device may replace the public network IP address in the downlink network data packet with the private network target IP address and replace the target public network port information in the downlink network data packet with the private network target port information, so that the downlink air interface data packet is obtained.
And secondly, the network element equipment acquires a target downlink air interface data packet according to the downlink air interface data packet.
In a possible implementation manner, the network element device may search, according to a private network target IP address included in the private network target address, target air interface header information corresponding to the private network target IP address in the first mapping relationship database. After the network element equipment finds out the target air interface head information corresponding to the private network target IP address, the downlink air interface data packet is packaged with the target air interface head information to obtain the target air interface head information.
The network element equipment correspondingly processes the processed target downlink air interface data through protocol layers such as an RLC layer, an MAC layer and the like to obtain air interface transmission data, and the network element equipment sends the air interface transmission data to the terminal through the corresponding antenna unit.
The embodiment couples the functions of traffic aggregation, flow distribution proxy and the like of the network element equipment, enriches the traffic management mode of the access network party, enables the popularization of 5G coverage to be more personalized and family-oriented, is simple to deploy, enables the distributed unit equipment to be plug and play, and provides a brand-new solution for an operator or an equipment manufacturer to widen the market of individual family customers.
It should be understood that, although the steps in the above-described flowcharts are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least a part of the steps in the above-mentioned flowcharts may include a plurality of steps or a plurality of stages, which are not necessarily performed at the same time, but may be performed at different times, and the order of performing the steps or the stages is not necessarily performed in sequence, but may be performed alternately or alternately with other steps or at least a part of the steps or the stages in other steps.
In one embodiment, as shown in fig. 7, there is provided a data transmission apparatus including:
a receiving module 10, configured to receive a transmission data packet for a data service;
a first transmission module 20, configured to, if the transmission data packet is an uplink air interface data packet, obtain a target uplink network data packet based on the uplink air interface data packet, and send the target uplink network data packet to a central unit, where the target uplink network data packet is used by the central unit to send network transmission data to a network server based on the target uplink network data packet;
a second transmission module 30, configured to, if the transmission data packet is a downlink network data packet, obtain a target downlink air interface data packet based on the downlink network data packet, and send air interface transmission data to a terminal based on the target downlink air interface data packet.
In one embodiment, the first transmission module 20 includes:
an identifying unit, configured to identify target air interface header information of the uplink air interface data packet, and remove the target air interface header information from the uplink air interface data packet to obtain an uplink network data packet;
a first obtaining unit, configured to obtain the target uplink network data packet based on the uplink network data packet.
In one embodiment, the upstream network packet includes a private network source address, and the first transmission module 20 further includes:
a first storage unit, configured to store the target air interface header information and the private network source address as a mapping relationship record in a first mapping relationship database, where the first mapping relationship database is used for the network element device to search, according to a private network address, air interface header information corresponding to the private network address.
In an embodiment, the uplink network data packet includes a private network source address, and the first obtaining unit is specifically configured to convert the private network source address in the uplink network data packet into the public network address according to the public network address of the network element device, so as to obtain the target uplink network data packet.
In one embodiment, the private network source address includes a private network source IP address and private network source port information, the public network address includes a public network IP address and target public network port information of a port that receives the uplink air interface packet, and the first obtaining unit is specifically configured to replace the private network source IP address in the uplink network packet with the public network IP address, and replace the private network source port information in the uplink network packet with the target public network port information, so as to obtain the target uplink network packet.
In one embodiment, the first transmission module 20 further comprises:
and the second storage unit is used for storing the private network source IP address, the private network source port information and the target public network port information as a mapping relation record in a second mapping relation database, and the second mapping relation database is used for the network element equipment to search the private network IP address and the private network port information corresponding to the public network port information according to the public network port information.
In an embodiment, the downlink network packet includes a public network address of the network element device, and the second transmission module 30 includes:
a determining unit, configured to determine a private network target address corresponding to the downlink network data packet, and convert the public network address in the downlink network data packet into the private network target address according to the private network target address, so as to obtain a downlink air interface data packet;
and a second obtaining unit, configured to obtain the target downlink air interface data packet according to the downlink air interface data packet.
In an embodiment, the determining unit is specifically configured to determine a port at which the network element device receives the downlink network packet; and determining the private network target address corresponding to the target public network port information in a second mapping relation database according to the target public network port information of the port, wherein the private network target address comprises a private network target IP address and private network target port information.
In an embodiment, the public network address includes a public network IP address and the target public network port information, and the determining unit is specifically configured to replace the public network IP address in the downlink network data packet with the private network target IP address, and replace the target public network port information in the downlink network data packet with the private network target port information, so as to obtain the downlink air interface data packet.
In an embodiment, the second obtaining unit is specifically configured to search, according to a private network target IP address included in the private network target address, target air interface header information corresponding to the private network target IP address in a first mapping relationship database; and encapsulating the target air interface head information into the downlink air interface data packet to obtain the target air interface head information.
In an embodiment, the receiving module 10 is specifically configured to receive the transmission data packet through a secure tunnel between the network element device and the central unit.
For specific limitations of the data transmission device, reference may be made to the above limitations of the data transmission method, which are not described herein again. The modules in the data transmission device can be wholly or partially implemented by software, hardware and a combination thereof. The modules may be embedded in a hardware form or independent from a processor in the network element device, or may be stored in a memory in the network element device in a software form, so that the processor can call and execute operations corresponding to the modules.
In one embodiment, a network element device is provided, which may be a server, and its internal structure diagram may be as shown in fig. 8. The network element device includes a processor, a memory, and a network interface connected by a system bus. Wherein the processor of the network element device is configured to provide computational and control capabilities. The memory of the network element device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The database of the network element device is used for storing data transmission data. The network interface of the network element device is used for communicating with an external terminal through network connection. The computer program is executed by a processor to implement a data transmission method.
Those skilled in the art will appreciate that the architecture shown in fig. 8 is a block diagram of only a portion of the architecture associated with the subject application, and does not constitute a limitation on the network element devices to which the subject application applies, and that a particular network element device may include more or fewer components than those shown, or may combine certain components, or have a different arrangement of components.
In one embodiment, there is provided a network element device comprising a memory and a processor, the memory having stored therein a computer program, the processor implementing the following steps when executing the computer program:
receiving a transmission data packet aiming at the data service;
if the transmission data packet is an uplink air interface data packet, acquiring a target uplink network data packet based on the uplink air interface data packet, and sending the target uplink network data packet to a centralized unit, wherein the target uplink network data packet is used for the centralized unit to send network transmission data to a network server based on the target uplink network data packet;
and if the transmission data packet is a downlink network data packet, acquiring a target downlink air interface data packet based on the downlink network data packet, and sending air interface transmission data to a terminal based on the target downlink air interface data packet.
In one embodiment, the processor, when executing the computer program, further performs the steps of:
identifying target air interface head information of the uplink air interface data packet, and removing the target air interface head information from the uplink air interface data packet to obtain an uplink network data packet;
and acquiring the target uplink network data packet based on the uplink network data packet.
In one embodiment, the upstream network packet includes a private network source address, and the processor when executing the computer program further performs the following steps:
and storing the target air interface head information and the private network source address as a mapping relation record in a first mapping relation database, wherein the first mapping relation database is used for the network element equipment to search the air interface head information corresponding to the private network address according to the private network address.
In one embodiment, the upstream network packet includes a private network source address, and the processor when executing the computer program further performs the following steps:
and converting the private network source address in the uplink network data packet into the public network address according to the public network address of the network element equipment to obtain the target uplink network data packet.
In one embodiment, the private network source address includes a private network source IP address and private network source port information, the public network address includes a public network IP address and target public network port information of a port that receives the uplink air interface packet, and the processor further implements the following steps when executing the computer program:
and replacing the private network source IP address in the uplink network data packet with the public network IP address, and replacing the private network source port information in the uplink network data packet with the target public network port information to obtain the target uplink network data packet.
In one embodiment, the processor, when executing the computer program, further performs the steps of:
and storing the private network source IP address, the private network source port information and the target public network port information as a mapping relation record in a second mapping relation database, wherein the second mapping relation database is used for the network element equipment to search the private network IP address and the private network port information corresponding to the public network port information according to the public network port information.
In an embodiment, the downlink network packet includes a public network address of the network element device, and the processor, when executing the computer program, further implements the following steps:
determining a private network target address corresponding to the downlink network data packet, and converting the public network address in the downlink network data packet into the private network target address according to the private network target address to obtain a downlink air interface data packet;
and acquiring the target downlink air interface data packet according to the downlink air interface data packet.
In one embodiment, the processor, when executing the computer program, further performs the steps of:
determining a port of the network element equipment for receiving the downlink network data packet;
and determining the private network target address corresponding to the target public network port information in a second mapping relation database according to the target public network port information of the port, wherein the private network target address comprises a private network target IP address and private network target port information.
In one embodiment, the public network address includes a public network IP address and the target public network port information, and the processor when executing the computer program further performs the steps of:
and replacing the public network IP address in the downlink network data packet with the private network target IP address, and replacing the target public network port information in the downlink network data packet with the private network target port information to obtain the downlink air interface data packet.
In one embodiment, the processor, when executing the computer program, further performs the steps of:
according to the private network target IP address included in the private network target address, searching target air interface head information corresponding to the private network target IP address in a first mapping relation database;
and encapsulating the target air interface head information into the downlink air interface data packet to obtain the target air interface head information.
In one embodiment, the processor, when executing the computer program, further performs the steps of:
and receiving the transmission data packet through a security tunnel between the network element equipment and the centralized unit.
In one embodiment, a computer-readable storage medium is provided, having a computer program stored thereon, which when executed by a processor, performs the steps of:
receiving a transmission data packet aiming at the data service;
if the transmission data packet is an uplink air interface data packet, acquiring a target uplink network data packet based on the uplink air interface data packet, and sending the target uplink network data packet to a centralized unit, wherein the target uplink network data packet is used for the centralized unit to send network transmission data to a network server based on the target uplink network data packet;
and if the transmission data packet is a downlink network data packet, acquiring a target downlink air interface data packet based on the downlink network data packet, and sending air interface transmission data to a terminal based on the target downlink air interface data packet.
In one embodiment, the computer program when executed by the processor further performs the steps of:
identifying target air interface head information of the uplink air interface data packet, and removing the target air interface head information from the uplink air interface data packet to obtain an uplink network data packet;
and acquiring the target uplink network data packet based on the uplink network data packet.
In one embodiment, the upstream network packet includes a private network source address, and the computer program when executed by the processor further performs the steps of:
and storing the target air interface head information and the private network source address as a mapping relation record in a first mapping relation database, wherein the first mapping relation database is used for the network element equipment to search the air interface head information corresponding to the private network address according to the private network address.
In one embodiment, the upstream network packet includes a private network source address, and the computer program when executed by the processor further performs the steps of:
and converting the private network source address in the uplink network data packet into the public network address according to the public network address of the network element equipment to obtain the target uplink network data packet.
In one embodiment, the private network source address includes a private network source IP address and private network source port information, and the public network address includes a public network IP address and target public network port information of a port that receives the uplink air interface packet, and when executed by the processor, the computer program further implements the following steps:
and replacing the private network source IP address in the uplink network data packet with the public network IP address, and replacing the private network source port information in the uplink network data packet with the target public network port information to obtain the target uplink network data packet.
In one embodiment, the computer program when executed by the processor further performs the steps of:
and storing the private network source IP address, the private network source port information and the target public network port information as a mapping relation record in a second mapping relation database, wherein the second mapping relation database is used for the network element equipment to search the private network IP address and the private network port information corresponding to the public network port information according to the public network port information.
In an embodiment, the downlink network packet includes a public network address of the network element device, and the computer program when executed by the processor further implements the following steps:
determining a private network target address corresponding to the downlink network data packet, and converting the public network address in the downlink network data packet into the private network target address according to the private network target address to obtain a downlink air interface data packet;
and acquiring the target downlink air interface data packet according to the downlink air interface data packet.
In one embodiment, the computer program when executed by the processor further performs the steps of:
determining a port of the network element equipment for receiving the downlink network data packet;
and determining the private network target address corresponding to the target public network port information in a second mapping relation database according to the target public network port information of the port, wherein the private network target address comprises a private network target IP address and private network target port information.
In one embodiment, the public network address comprises a public network IP address and the target public network port information, the computer program when executed by the processor further performs the steps of:
and replacing the public network IP address in the downlink network data packet with the private network target IP address, and replacing the target public network port information in the downlink network data packet with the private network target port information to obtain the downlink air interface data packet.
In one embodiment, the computer program when executed by the processor further performs the steps of:
according to the private network target IP address included in the private network target address, searching target air interface head information corresponding to the private network target IP address in a first mapping relation database;
and encapsulating the target air interface head information into the downlink air interface data packet to obtain the target air interface head information.
In one embodiment, the computer program when executed by the processor further performs the steps of:
and receiving the transmission data packet through a security tunnel between the network element equipment and the centralized unit.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database or other medium used in the embodiments provided herein can include at least one of non-volatile and volatile memory. Non-volatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical storage, or the like. Volatile Memory can include Random Access Memory (RAM) or external cache Memory. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), among others.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (14)
1. A data transmission method, for a network element device, the method comprising:
receiving a transmission data packet aiming at the data service;
if the transmission data packet is an uplink air interface data packet, acquiring a target uplink network data packet based on the uplink air interface data packet, and sending the target uplink network data packet to a centralized unit, wherein the target uplink network data packet is used for the centralized unit to send network transmission data to a network server based on the target uplink network data packet;
and if the transmission data packet is a downlink network data packet, acquiring a target downlink air interface data packet based on the downlink network data packet, and sending air interface transmission data to a terminal based on the target downlink air interface data packet.
2. The method according to claim 1, wherein the obtaining a target uplink network packet based on the uplink air interface packet includes:
identifying target air interface head information of the uplink air interface data packet, and removing the target air interface head information from the uplink air interface data packet to obtain an uplink network data packet;
and acquiring the target uplink network data packet based on the uplink network data packet.
3. The method of claim 2, wherein the uplink network data packet includes a private network source address, and after the target air interface header information is removed from the uplink air interface data packet and the uplink network data packet is obtained, the method further comprises:
and storing the target air interface head information and the private network source address as a mapping relation record in a first mapping relation database, wherein the first mapping relation database is used for the network element equipment to search the air interface head information corresponding to the private network address according to the private network address.
4. The method of claim 2, wherein the upstream network packet includes a private network source address, and wherein obtaining the target upstream network packet based on the upstream network packet comprises:
and converting the private network source address in the uplink network data packet into the public network address according to the public network address of the network element equipment to obtain the target uplink network data packet.
5. The method of claim 4, wherein the private network source address includes a private network source IP address and private network source port information, the public network address includes a public network IP address and target public network port information of a port that receives the uplink air interface packet, and the converting the private network source address in the uplink network packet into the public network address according to the public network address of the network element device to obtain the target uplink network packet comprises:
and replacing the private network source IP address in the uplink network data packet with the public network IP address, and replacing the private network source port information in the uplink network data packet with the target public network port information to obtain the target uplink network data packet.
6. The method of claim 5, further comprising:
and storing the private network source IP address, the private network source port information and the target public network port information as a mapping relation record in a second mapping relation database, wherein the second mapping relation database is used for the network element equipment to search the private network IP address and the private network port information corresponding to the public network port information according to the public network port information.
7. The method according to claim 1, wherein the downlink network packet includes a public network address of the network element device, and the obtaining a target downlink air interface packet based on the downlink network packet includes:
determining a private network target address corresponding to the downlink network data packet, and converting the public network address in the downlink network data packet into the private network target address according to the private network target address to obtain a downlink air interface data packet;
and acquiring the target downlink air interface data packet according to the downlink air interface data packet.
8. The method of claim 7, wherein the determining the private network destination address corresponding to the downlink network packet comprises:
determining a port of the network element equipment for receiving the downlink network data packet;
and determining the private network target address corresponding to the target public network port information in a second mapping relation database according to the target public network port information of the port, wherein the private network target address comprises a private network target IP address and private network target port information.
9. The method of claim 8, wherein the public network address comprises a public network IP address and the target public network port information, and the converting the public network address in the downlink network packet into the private network target address according to the private network target address to obtain a downlink air interface packet comprises:
and replacing the public network IP address in the downlink network data packet with the private network target IP address, and replacing the target public network port information in the downlink network data packet with the private network target port information to obtain the downlink air interface data packet.
10. The method according to claim 7, wherein the obtaining the target downlink air interface data packet according to the downlink air interface data packet includes:
according to the private network target IP address included in the private network target address, searching target air interface head information corresponding to the private network target IP address in a first mapping relation database;
and encapsulating the target air interface head information into the downlink air interface data packet to obtain the target air interface head information.
11. The method of claim 1, wherein receiving the transmission data packet for the data service comprises:
and receiving the transmission data packet through a security tunnel between the network element equipment and the centralized unit.
12. A data transmission apparatus, configured to be disposed in a network element device, the apparatus comprising:
a receiving module, configured to receive a transmission data packet for a data service;
a first transmission module, configured to, if the transmission data packet is an uplink air interface data packet, obtain a target uplink network data packet based on the uplink air interface data packet, and send the target uplink network data packet to a central unit, where the target uplink network data packet is used by the central unit to send network transmission data to a network server based on the target uplink network data packet;
and the second transmission module is used for acquiring a target downlink air interface data packet based on the downlink network data packet and sending air interface transmission data to a terminal based on the target downlink air interface data packet if the transmission data packet is a downlink network data packet.
13. Network element device comprising a memory and a processor, said memory storing a computer program, characterized in that said processor realizes the steps of the data transmission method according to any of claims 1 to 11 when executing said computer program.
14. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the data transmission method according to any one of claims 1 to 11.
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