CN114629974A

CN114629974A - Message transmission method, device and equipment

Info

Publication number: CN114629974A
Application number: CN202210504137.5A
Authority: CN
Inventors: 李灿灿; 彭丹
Original assignee: New H3C Technologies Co Ltd
Current assignee: New H3C Technologies Co Ltd
Priority date: 2022-05-10
Filing date: 2022-05-10
Publication date: 2022-06-14

Abstract

The application provides a message transmission method, a message transmission device and message transmission equipment. And the 5G base station deploys a CU and/or a DU, both the CU and the DU are deployed with GTPU modules, when a sending end of the CU or the DU transmits a message, if the sending end determines to execute message fragmentation operation on the obtained target message to be transmitted, the GTPU module performs message fragmentation operation on the target message, so that the length of any message fragment obtained after the message fragmentation operation is not further fragmented when the message needs to pass through an IP layer, and the obtained message fragment is encapsulated through the GTPU module, so that the encapsulated message fragment carries a GTPU basic header and a GTPU extended header and is transmitted. It can be seen that, in the technical scheme provided in this embodiment, the packet fragmentation operation is no longer executed by the IP layer, but the packet is processed by the GTP layer, so that the requirement of the low-latency service is met as much as possible without increasing network elements, and the service pressure of the IP layer can be relieved.

Description

Message transmission method, device and equipment

Technical Field

The present application relates to network communication technologies, and in particular, to a method, an apparatus, and a device for packet transmission.

Background

The fifth Generation Mobile Communication Technology (5 th Generation Mobile Communication Technology, abbreviated as 5G) is a new Generation broadband Mobile Communication Technology with high speed, low latency and large connection features, and is increasingly applied in various large technical fields.

The baseband processing Unit of the 5G base station device mainly includes a CU (Centralized Unit) and a DU (Distributed Unit), where the CU and the DU of the current 5G base station device are all deployed in a unified manner, that is, the CU and the DU are deployed on the same device, and both fragmentation and reassembly of the current data packet are processed in an IP protocol stack, but when the communication between the CU and the DU does not pass through a TCP/IP, UDP, or IP network protocol stack, the 5G base station device cannot realize fragmentation and reassembly of the internal packet. In addition, in order to realize the sharing of baseband resources, CU and DU are deployed in a separated manner, so that packet fragmentation is mainly processed on an IP layer, but the increase of network elements often causes an increase of time delay, which has a great influence on low-delay services, and particularly, under the condition that a fragmentation packet exists, the pressure of the IP layer in the packet transmission process is increased sharply.

Disclosure of Invention

The application provides a message transmission method, a message transmission device and message transmission equipment, which are used for relieving the service pressure of an IP layer while meeting the requirement of low-delay service.

The technical scheme provided by the application comprises the following steps:

in a first aspect, an embodiment of the present application provides a packet transmission method, where the method is applied to a sending end of a 5G base station, and the 5G base station deploys a centralized processing unit CU and/or a separate processing unit DU, where both the CU and the DU deploy GTPU modules, and the method includes:

obtaining a target message to be transmitted; the target message is a message transmitted from the CU to the DU when the sending end is the CU, or the target message is a message transmitted from the DU to the CU when the sending end is the DU;

judging whether to execute message fragmentation operation on a target message, if so, performing message fragmentation operation on the target message through a deployed GTPU module so that the length of any message fragment obtained after the message fragmentation operation is not further fragmented when the message fragment needs to pass through an IP layer; encapsulating the obtained message fragments through a deployed GTPU module, and transmitting the encapsulated message fragments, wherein the encapsulated message fragments carry a GTPU basic header and a GTPU extended header, and the message type of the GTPU extended header represents the type of the GTPU fragment extended header and carries message fragment information;

and if not, packaging the target message through the deployed GTPU module, and transmitting the packaged target message, wherein the packaged target message carries a GTPU basic header.

In a second aspect, an embodiment of the present application provides a packet transmission method, where the method is applied to a receiving end of a 5G base station, and the 5G base station deploys a central processing unit CU and/or a separation processing unit DU, where the central processing unit CU and the separation processing unit DU both deploy GTPU modules, and the method includes:

receiving a message, and determining that the message is a message fragment of a target message when the message carries a GTPU extended header with the type of the GTPU fragment extended header; the GTPU extension header also carries message fragment information; the message is transmitted from a DU to a CU when the receiving end is the CU, or the message is transmitted from the CU to the DU when the receiving end is the DU;

and according to the message fragment information, recombining all message fragments belonging to the target message to obtain the target message.

In a third aspect, an embodiment of the present application further provides a packet transmission apparatus, where the apparatus is applied to a sending end of a 5G base station, and the 5G base station deploys a central processing unit CU and/or a separation processing unit DU, where the central processing unit CU and the separation processing unit DU both deploy GTPU modules, and the apparatus includes:

a message obtaining unit, configured to obtain a target message to be transmitted; under the condition that the sending end is a CU, the target message is a message transmitted from the CU to a DU, or under the condition that the sending end is a DU, the target message is a message transmitted from the DU to the CU;

the fragment judging unit is used for judging whether to execute message fragment operation on the target message, if so, executing the message fragment unit, and if not, executing the message packaging unit;

the message fragmentation processing unit is used for performing message fragmentation operation on the target message through the deployed GTPU module, so that the length of any message fragment obtained after the message fragmentation operation is not further fragmented when the message fragment needs to pass through an IP layer; encapsulating the obtained message fragments through a deployed GTPU module, and transmitting the encapsulated message fragments, wherein the encapsulated message fragments carry and transmit a GTPU basic header and a GTPU extended header, and the message type of the GTPU extended header represents the type of the GTPU fragment extended header and carries message fragment information;

and the message encapsulating unit is used for encapsulating the target message through the deployed GTPU module and transmitting the encapsulated target message, and the encapsulated target message carries and transmits the GTPU basic header.

In a fourth aspect, an embodiment of the present application further provides a packet transmission apparatus, where the apparatus is applied to a receiving end of a 5G base station, and the 5G base station deploys a central processing unit CU and/or a separation processing unit DU, where the central processing unit CU and the separation processing unit DU both deploy GTPU modules, and the apparatus includes:

a message receiving unit, configured to receive a message, and trigger a message determining unit when the message carries a GTPU extension header of a GTPU fragmentation extension header type; the message is transmitted from a DU to a CU when the receiving end is the CU, or the message is transmitted from the CU to the DU when the receiving end is the DU; the GTPU extension header also carries message fragment information;

the message determining unit is used for determining the message as a message fragment of the target message;

and the recombining unit is used for recombining all the message fragments belonging to the target message according to the message fragment information to obtain the target message.

According to the technical scheme, the 5G base station deploys the centralized processing unit CU and/or the separate processing unit DU, the GTPU modules are deployed in the CU and the DU, when the CU or the DU serving as a sending end transmits a message, if the message slicing operation is determined to be executed on the obtained target message to be transmitted, the GTPU module performs the message slicing operation on the target message, so that the length of any message slice obtained after the message slicing operation is not further sliced when the message slice needs to pass through an IP layer, the obtained message slice is packaged through the GTPU module, and the packaged message slice is transmitted. It can be seen that, in the technical scheme provided in this embodiment, a packet fragmentation operation is not performed through an IP layer, but is processed through a GTP layer, when network packet transmission is implemented, a CU or DU deployed with a GTPU module performs packet fragmentation on a packet, and the packet length of the packet fragmentation is set reasonably, so that no fragmentation is required when an ultra-long packet passes through the IP layer, and thus, on the basis of not increasing network elements, requirements of low-latency services are met as much as possible, and service pressure of the IP layer can be relieved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

Fig. 1 is a schematic structural diagram of a CU and DU separation deployment provided in the present application;

fig. 2 is a flowchart of a method of transmitting a message according to the present application;

fig. 3 is a flowchart of a method of another message transmission method provided in the present application;

fig. 4 is a schematic structural diagram of a first message transmission apparatus provided in the present application;

fig. 5 is a schematic structural diagram of a second message transmission apparatus provided in the present application;

fig. 6 is a schematic structural diagram of an electronic device provided in the present application.

Detailed Description

The baseband processing unit of the 5G base station device mainly includes CU and DU, and currently, the CU and DU of the 5G base station device are all in one deployed mode, that is, the CU and DU are deployed on the same device, but when the communication between the CU and the DU does not pass through TCP/IP UDP or an IP network protocol stack, the packet fragmentation and reassembly based on an IP layer cannot be implemented inside the 5G base station device. In addition, in order to implement sharing of baseband resources, it is a great trend that CUs and DUs are separately deployed, that is, CUs and DUs are deployed on different devices, specifically, referring to fig. 1, in fig. 1, DUs are deployed on AAUs (Active Antenna units) in different base stations 1, 2, and 3, and each base station shares CUs that are deployed on the same base station, and CUs are connected to a 5G core network. However, the increase of network elements often brings about the increase of time delay, which will bring about a great influence on low-delay services, especially under the condition that there is a fragment message, the pressure of an IP layer in the message transmission process is increased sharply.

It can be seen that the current packet fragment is mainly processed at the IP layer, i.e. packet fragmentation and reassembly based on the IP layer. That is to say, the current packet fragmentation processing is mainly implemented based on the TCP/IP network protocol stack, and for a scenario where 5GBBU (Building Base band Unit, baseband processing Unit) is deployed in a unified manner, if packet fragmentation processing is performed based on the TCP/IP network protocol between CU and DU units, transmission load is additionally increased.

In order to solve the foregoing technical problem, an embodiment of the present application provides a packet transmission method, where the method is applied to a sending end of a 5G base station, and the 5G base station deploys a centralized processing unit CU and/or a separate processing unit DU, where both the CU and the DU deploy GTPU modules, and the method includes: obtaining a target message to be transmitted; the target message is a message transmitted from the CU to the DU when the sending end is the CU, or the target message is a message transmitted from the DU to the CU when the sending end is the DU; judging whether to execute message fragmentation operation on a target message, if so, performing message fragmentation operation on the target message through a deployed GTPU module so that the length of any message fragment obtained after the message fragmentation operation is not further fragmented when the message fragment needs to pass through an IP layer; encapsulating the obtained message fragments through a deployed GTPU module, and transmitting the encapsulated message fragments, wherein the encapsulated message fragments carry a GTPU basic header and a GTPU extended header, and the message type of the GTPU extended header represents the type of the GTPU fragment extended header and carries message fragment information; if not, packaging the target message through a deployed GTPU module, and transmitting the packaged target message, wherein the packaged target message carries a GTPU basic header and is transmitted.

It can be seen that, the 5G base station deploys the centralized processing unit CU and/or the separate processing unit DU, and both the CU and the DU deploy the GTPU module, when the CU or the DU serving as the sending end transmits a message, if it is determined that a message fragmentation operation is performed on an obtained target message to be transmitted, the GTPU module performs a message fragmentation operation on the target message, so that the length of any message fragment obtained after the message fragmentation operation is not further fragmented when the message needs to pass through the IP layer, and encapsulates the obtained message fragment by the GTPU module, and transmits the encapsulated message fragment. It can be seen that, in the technical scheme provided in this embodiment, a packet fragmentation operation is not performed through an IP layer, but is processed through a GTP layer, when network packet transmission is implemented, a CU or DU deployed with a GTPU module performs packet fragmentation on a packet, and a packet length of the packet fragmentation of the GTP layer is set reasonably, so that no fragmentation is required when an ultra-long packet passes through the IP layer, and thus, on the basis of not increasing network elements, requirements of low-latency services are met as much as possible, and service pressure of the IP layer can be relieved.

Based on the above description, the flow shown in fig. 2 provided by the present application is described below:

referring to fig. 2, fig. 2 is a flowchart of a method of transmitting a message according to the present application. The method is applied to a sending end of a 5G base station, the 5G base station is provided with a centralized processing unit CU, a separation processing unit DU, a centralized processing unit CU and a separation processing unit DU, wherein GTPU modules are respectively arranged in the CU and the DU.

In some embodiments, the CU and the DU may be deployed on the same 5G base station, implementing a unified deployment mode, and the GTPU module is deployed in both the CU and the DU.

In other embodiments, the CU and the DU are separately deployed on different 5G base stations, and the GTPU module is deployed in both the CU and the DU. Illustratively, the CUs are deployed on one 5G base station, and the DUs are deployed on another 5G base station, so that a separate deployment mode is realized.

As shown in fig. 2, the process may include the following steps:

step 101, obtaining a target message to be transmitted.

In this embodiment, the target packet may be a packet transmitted from a CU to a DU when the sending end is a CU, or may also be a packet transmitted from a DU to a CU when the sending end is a DU, which is not limited in this embodiment.

Step 102, judging whether to execute message fragmentation operation on the target message, if so, executing step 103, and if not, executing step 104.

And if the target message is configured to not need to be fragmented, directly encapsulating the GTPU message, and sending the encapsulated GTPU message to a receiving end.

As an embodiment, the implementation manner of implementing step 102 may include: determining whether a fragmentation parameter configured for a target message is set as a first parameter, wherein the first parameter is used for representing message fragmentation of the message; if yes, determining that message fragmentation operation needs to be performed on the target message, and performing step 103; if not, it is determined that the message fragmentation operation does not need to be performed on the target message, and step 104 is directly performed. In this embodiment, the first parameter may be represented by "0", or may be represented by other values, which is not limited in this embodiment, and when it is determined that the fragmentation parameter is the first parameter, that is, "0", it indicates that the packet fragmentation needs to be performed on the packet. When the fragmentation parameter is the second parameter, if the second parameter is "1", it indicates that the message fragmentation is not required.

103, performing message fragmentation operation on the target message through a deployed GTPU module, so that the length of any message fragment obtained after the message fragmentation operation is not further fragmented when the message fragment needs to pass through an IP layer; and encapsulating the obtained message fragments through the deployed GTPU module, and transmitting the encapsulated message fragments.

In the step, the encapsulated message fragments carry GTPU basic header and GTPU extended header and are transmitted.

The target message may or may not pass through the IP layer, and when actually transmitted, for the condition that the message passes through the UDP/IP protocol stack, each message fragment obtained after the message fragmentation is performed on the target message, and the message length of each message fragment when reaching the IP layer is smaller than the maximum message transmission unit of the IP layer.

The encapsulated packet fragments carrying the GTPU base header and GTPU extension header are shown in table 1 below. The message format of one message fragment is shown in table 1 below:

wherein, the GTPU base header format is shown in table 2:

wherein, the internet standard uses Octets, 1 st byte, to express Extension Header Length; the 2 nd to m th bytes are used for representing the Extension Header Content, and the m +1 th byte is used for representing the Next Extension Header Type. m represents a byte sequence number.

The packet type of the GTPU extension header indicates a fragment extension header type, and the GTPU extension header carries packet fragment information, and a specific GTPU extension header format will be described in further detail later, which is not described herein again.

And 104, encapsulating the target message through the deployed GTPU module, and transmitting the encapsulated target message.

In this step, the encapsulated target packet carries the GTPU base header and is transmitted.

The step directly encapsulates the target file without message fragmentation, and the encapsulated target message carries a GTPU basic header.

So far, the description shown in fig. 2 is completed.

Therefore, in the technical scheme of the embodiment of the application, a 5G base station deploys a centralized processing unit CU and/or a separate processing unit DU, and both the CU and the DU deploy GTPU modules, when the CU or the DU serving as a sending end transmits a message, if it is determined that a message fragmentation operation is performed on an obtained target message to be transmitted, the GTPU module performs a message fragmentation operation on the target message, so that the length of any message fragment obtained after the message fragmentation operation is not further fragmented when the message needs to pass through an IP layer, the obtained message fragment is encapsulated by the GTPU module, and the encapsulated message fragment is transmitted. It can be seen that, in the technical scheme provided in this embodiment, a packet fragmentation operation is not performed through an IP layer, but is processed through a GTP layer, when network packet transmission is implemented, a CU or DU deployed with a GTPU module performs packet fragmentation on a packet, and a packet length of the packet fragmentation of the GTP layer is set reasonably, so that no fragmentation is required when an ultra-long packet passes through the IP layer, and thus, on the basis of not increasing network elements, requirements of low-latency services are met as much as possible, and service pressure of the IP layer can be relieved.

As an embodiment, the implementation of step 102 includes the following steps a and B:

step A, obtaining the load data length of the target message; and B, if the sum of the load data length, the defined GTPU basic header length and the GTPU extended header length exceeds the set maximum transmission unit gMTU of the message, executing step B, and if not, executing step C.

After the message fragmentation operation is performed on the target message, each message fragment inevitably carries a defined GTPU base header length and GTPU extension header length, and based on this, when judging whether fragmentation processing is performed on the target message, it needs to be determined whether the sum of the load data length and the defined GTPU extension header length exceeds the set maximum transmission unit gMTU of the message.

It should be noted that gMTU is a message length that each message fragment obtained after fragmentation is not further fragmented when it needs to pass through the IP layer.

In actual transmission, aiming at the condition that a message passes through a UDP/IP protocol stack, the maximum message transmission unit gMTU used for message fragmentation of a target message is smaller than or equal to (the maximum message transmission unit-IP header length-UDP header length of an IP layer), so that when the obtained message fragment reaches the IP layer, the message length of the message fragment is smaller than the maximum message transmission unit of the IP layer, and based on the result, the fragmented message can not be further fragmented at the IP layer, and the transmission pressure of the IP layer can be further relieved.

And step B, determining to execute message fragmentation operation on the target message.

As an embodiment, a gMTU is used as a unit, a message fragmentation operation is performed on a target message to obtain N message fragments, where N is greater than 1, the message lengths of the first message fragment and the middle message fragment in the N message fragments are gMTU, and the message length of the last message fragment is less than or equal to gMTU.

And step C, determining that the message fragmentation operation is not executed on the target message.

As described in detail below, in some embodiments, the packet fragmentation information at least includes: MF and a target message identifier Idenconfiguration; the MF is used to indicate whether there are further message fragments for the target message, where the MF in the GTPU extension header carried by the last transmitted message fragment is set to a first value, the MF in the GTPU extension header carried by another message fragment is set to a second value, the first value is used to indicate that there are no message fragments to be transmitted for the target message, and the second value is used to indicate that there are further message fragments to be transmitted for the target message.

After message fragmentation is carried out on a target text, according to the fragmentation sequence of message fragmentation in the target text of each message fragmentation, if the message fragmentation is not the last message fragmentation in the fragmentation sequence, it indicates that the message fragmentation still has a next GTPU fragmentation message, the MF in message fragmentation information is set to be a second value, and if the message fragmentation is the last message fragmentation in the fragmentation sequence, it indicates that the message fragmentation does not have the next message fragmentation, that is, the last message fragmentation, and the MF in message fragmentation information is set to be a first value.

The first value and the second value are two distinct values. As an embodiment, the second value is "0", and when MF = =0, it indicates that the packet fragment is the last packet fragment after the target packet is fragmented. The second value is represented by "1", and when MF = =1, it represents that the next packet fragment still exists in the packet fragment.

In some embodiments, the packet fragmentation information further includes: slice Offset; offset is the Offset of the first byte of each message fragment in the target message. The Offset can ensure the transmission sequence of each message fragment corresponding to the target message, so that the message is recombined according to the Offset of the Offset during subsequent recombination.

In other embodiments, the message fragmentation information includes at least: the extension header length and the type identifier used for indicating the type of the next extension header after the GTPU sub-packet.

As an embodiment, for each packet fragment, the GTPU extension header of the packet fragment is encapsulated according to a preset GTPU fragment extension format, where the extension header length, Offset, MF, idenfunction and a type identifier used to represent a next extension header type after the GTPU fragment are included in packet fragment information associated with the packet fragment.

In this embodiment, the following extension header type of the GTPU extension header may be defined in advance as follows: fragment Header for GTPU (0xC 4).

For example, the preset extended header format may be set according to the following table 3:

the fields are defined as follows:

extension Header Length, illustratively, if the field has a value of 0x02, indicating an Extension Header Length of 0x02 x 4=8 bytes;

offset: the offset of the first byte of each message fragment in the target message is 31 bits, and the offset of the GTPU sub-message is calculated;

MF, more fragment abbreviation, 1 bit, 1 indicates that the message still has message fragments in the follow-up; a value of 0 indicates that the packet fragment is the last packet fragment of the target packet.

Identification: the destination message identifier, 32 bits, an identifier field, uniquely identifies a destination message.

Next Extension Header Type: and indicating the Type of the Next Extension Header, indicating that no other Extension Header exists when the Next Extension Header Type is set to 0, and indicating that the Extension Header of the other Type exists when the Next Extension Header Type is set to the other identification value.

As an embodiment, before encapsulating the obtained packet fragment by the deployed GTPU module, the method further includes: if the message fragments need to carry other types of extension heads, determining whether the message fragments are the first transmitted message fragments, if so, further adding other types of extension heads to the message fragments to encapsulate the obtained message fragments through a deployed GTPU module, wherein the encapsulated message fragments at least carry the message fragments of other types of extension heads, GTPU basic heads and GTPU extension heads, and if not, executing the step of encapsulating the obtained message fragments through the deployed GTPU module. As can be seen, in this embodiment, when the target packet has other extension header types, the GTPU extension header priority as the fragmentation extension header is set to be the lowest.

Referring to fig. 3, fig. 3 is a flowchart of a method of transmitting a message according to the present application. The method is applied to a receiving end of a 5G base station, the 5G base station is provided with a centralized processing unit CU, a separation processing unit DU, a centralized processing unit CU and a separation processing unit DU, wherein GTPU modules are respectively arranged in the CU and the DU.

As shown in fig. 3, the process may include the following steps:

step 301, receiving a message, and executing step 302 when the message carries a GTPU extension header of which the type is a GTPU fragment extension header type.

Under the condition that the receiving end is a CU, the received message can be a message transmitted from a DU to the CU, and under the condition that the receiving end is a DU, the received message can also be a message transmitted from the CU to the DU; the present embodiment is not limited to this.

The received message may be a message fragment or may be an un-fragmented message. Based on this, the extension header carried by the message is identified, and when the message carries the GTPU extension header of which the type is the GTPU fragment extension header type, this indicates that the message is a message fragment. Under such a premise, it needs to further determine whether the packet needs to be reassembled. Wherein, the GTPU extension head also carries message fragment information.

Step 302, determine that the message is a message fragment of the target message.

Step 303, according to the message fragment information, all message fragments belonging to the target message are recombined to obtain the target message.

In this embodiment, when all message fragments of the same target message are received, all message fragments are reassembled according to the message fragment information to obtain the target message. That is, for each received packet fragment, if the packet fragment is the first packet fragment or the middle packet fragment of the target packet, packet reassembly on the packet is not required. If the message fragment is the last message fragment of the target message, the message fragments of the same target message are only started to be recombined.

Up to this point, the description shown in fig. 3 is completed.

Therefore, in the technical scheme of the embodiment of the application, a 5G base station deploys a centralized processing unit CU and/or a separate processing unit DU, both the CU and the DU deploy GTPU modules, and when the CU or the DU serving as a receiving end receives a message, when the message carries a GTPU extension header of the type GTPU slice extension header, the message is determined to be a message slice of a target message; and according to the message fragment information carried by the GTPU extension header of the message, recombining all message fragments belonging to the target message to obtain the target message. It can be seen that, in the technical scheme provided in this embodiment, a packet reassembly operation is no longer performed through an IP layer, but is performed through a GTP layer, and when network packet reassembly is implemented, a CU or DU deployed with a GTPU module performs packet reassembly on a packet, so that on the basis of not increasing network elements, requirements of a low-latency service are met as far as possible, and service pressure of the IP layer can be relieved.

As an embodiment, the message fragmentation information at least includes: the target message identification Idenlocation and MF; after step 302, the method further comprises: and caching the corresponding relation between the message and the Idenconfiguration. Based on the above embodiment, in step 303, according to the message fragment information, the reassembly of all the message fragments belonging to the target message is performed on the premise that the MF is the first value, where the first value is used to indicate that there is no message fragment to be transmitted for the target message. This indicates that the packet fragment is the last packet fragment of the target packet. It should be noted that, if MF in the message fragment information carried by the GTPU extension header of the received message fragment is a second value, the second value is used to indicate that there is a subsequent message fragment to be transmitted. Step 303 is not performed. Based on the above embodiment, the implementation manner of the implementing step 303 may include: and recombining all cached messages corresponding to the target message identifier Idenconfiguration. This means that all messages corresponding to the same target file are recombined to obtain the target message.

As an embodiment, for a packet fragment, according to the Idenfication carried by the packet fragment, the packet fragment is cached in a specified cache in which the packet fragment corresponding to the identical Idenfication is located. It should be noted that, if the packet fragment is the first packet fragment, a specified cache associated with the idenfunction and used for caching the packet fragment corresponding to the same idenfunction is created according to the idenfunction corresponding to the packet fragment.

As an embodiment, the message fragmentation information further includes: slice Offset; the Offset is the Offset of the first byte of each message fragment in the target message;

when caching the corresponding relation between the message and the Idenconfiguration, the method further comprises the following steps: caching the slice Offset; the specific implementation manner of implementing step 303 may include: and according to the Offset sequence of the cached Offset of each message fragment corresponding to the Idenconfiguration relative to the target message, recombining all messages corresponding to the Idenconfiguration. In this step, the Idenfication may use a 32-bit identifier field for uniquely identifying a target packet.

This completes the description of the method embodiment.

The system provided by the present application is described below:

referring to fig. 4, fig. 4 is a first packet transmission apparatus 400 provided in the present application, and the apparatus is applied to a transmitting end of a 5G base station, where the 5G base station deploys a centralized processing unit CU and/or a separate processing unit DU, where the centralized processing unit CU and the separate processing unit DU both deploy GTPU modules, and the apparatus includes:

a message obtaining unit 401, configured to obtain a target message to be transmitted; the target message is a message transmitted from the CU to the DU when the sending end is the CU, or the target message is a message transmitted from the DU to the CU when the sending end is the DU;

a fragmentation judgment unit 402, configured to judge whether to perform a message fragmentation operation on a target message, if yes, perform a message fragmentation unit 403, and if no, perform a message encapsulation unit 404;

the message fragmentation processing unit 403 is configured to perform message fragmentation operation on the target message through the deployed GTPU module, so that the length of any message fragment obtained after the message fragmentation operation is not further fragmented when the length of any message fragment needs to pass through the IP layer; encapsulating the obtained message fragments through a deployed GTPU module, and transmitting the encapsulated message fragments, wherein the encapsulated message fragments carry and transmit a GTPU basic header and a GTPU extended header, and the message type of the GTPU extended header represents the type of the GTPU fragment extended header and carries message fragment information;

the packet encapsulating unit 404 is configured to encapsulate the target packet through the deployed GTPU module, and transmit the encapsulated target packet, where the encapsulated target packet carries and transmits a GTPU base header.

As an embodiment, the slice judging unit 402 has a function for:

obtaining the load data length of the target message;

and if the sum of the load data length, the defined GTPU basic header length and the GTPU extended header length exceeds the set message maximum transmission unit gMTU, determining to execute message fragmentation operation on the target message, and if not, determining not to execute message fragmentation operation on the target message.

As an embodiment, the message fragmentation information at least includes: MF and a target message identifier Idenconfiguration;

the MF is used for indicating whether a packet fragment aiming at the target packet exists, wherein the MF in the GTPU extension header carried by the last transmitted packet fragment is set to a first value, the MF in the GTPU extension header carried by other packet fragments is set to a second value, the first value is used for indicating that the packet fragment aiming at the target packet does not exist, and the second value is used for indicating that the packet fragment aiming at the target packet to be transmitted also exists.

As an embodiment, the message fragmentation information further includes: slice Offset; the Offset is an Offset of a first byte of each message fragment in the target message.

As an embodiment, before encapsulating the obtained packet fragment by the deployed GTPU module, the apparatus further includes:

and the fragment transmission unit is used for determining whether the message fragment is the first transmitted message fragment if the message fragment carries the extension headers of other types, if so, further adding the extension headers of other types to the message fragment so as to encapsulate the obtained message fragment by the deployed GTPU module, wherein the encapsulated message fragment at least carries the message fragments of the extension headers of other types, the GTPU basic header and the GTPU extension header, and if not, executing the step of encapsulating the obtained message fragment by the deployed GTPU module.

Therefore, in the technical scheme of the embodiment of the application, a centralized processing unit CU and/or a separate processing unit DU are deployed in a 5G base station, and GTPU modules are deployed in both the CU and the DU, and when a sending end of the CU or the DU transmits a message, if it is determined that a message fragmentation operation is performed on an obtained target message to be transmitted, the GTPU module performs a message fragmentation operation on the target message, so that the length of any message fragment obtained after the message fragmentation operation is not further fragmented when the message needs to pass through an IP layer, the obtained message fragment is encapsulated by the GTPU module, and the encapsulated message fragment is transmitted. It can be seen that, in the technical scheme provided in this embodiment, a packet fragmentation operation is not performed through an IP layer, but is processed through a GTP layer, when network packet transmission is implemented, a CU or DU deployed with a GTPU module performs packet fragmentation on a packet, and a packet length of the packet fragmentation of the GTP layer is set reasonably, so that no fragmentation is required when an ultra-long packet passes through the IP layer, and thus, on the basis of not increasing network elements, requirements of low-latency services are met as much as possible, and service pressure of the IP layer can be relieved.

The implementation process of the functions and actions of each unit in the above device is specifically described in the implementation process of the corresponding step in the above method, and is not described herein again.

Referring to fig. 5, fig. 5 is a second packet transmission apparatus 500 provided in the present application, which is applied to a receiving end of a 5G base station, where the 5G base station deploys a centralized processing unit CU and/or a separate processing unit DU, where the centralized processing unit CU and the separate processing unit DU both deploy GTPU modules, and the apparatus includes:

a message receiving unit 501, configured to receive a message, and trigger a message determining unit 502 when the message carries a GTPU extension header of which the type is a GTPU fragmented extension header type; the message is transmitted from a DU to a CU when the receiving end is the CU, or the message is transmitted from the CU to the DU when the receiving end is the DU; the GTPU extension header also carries message fragment information;

the message determining unit 502 is configured to determine that the message is a message fragment of a target message;

a reassembling unit 503, configured to reassemble all the packet fragments belonging to the target packet according to the packet fragment information, so as to obtain the target packet.

As an embodiment, the packet fragmentation information at least includes: target message identification Idenconfiguration and MF; the apparatus further comprises:

a relation caching unit, configured to cache a correspondence between the packet and the Idenfication;

the reassembly unit 503 is triggered on the premise that the MF is a first value, where the first value is used to indicate that there is no packet fragment to be transmitted for the target packet;

the recombination unit 503 includes: and the recombination module is used for recombining all cached messages corresponding to the target message identifier Idenconfiguration.

As an embodiment, the packet fragmentation information further includes: slice Offset; the Offset is the Offset of the first byte of each message fragment in the target message;

when caching the corresponding relation between the message and the Idenconfiguration, the device further comprises: caching the slice Offset;

the recombination module is specifically configured to: and according to the Offset sequence of each cached message fragment corresponding to the Idenconfiguration relative to the target message, recombining all messages corresponding to the Idenconfiguration.

Therefore, in the technical scheme of the embodiment of the application, a 5G base station deploys a centralized processing unit CU and/or a separate processing unit DU, both of which deploy GTPU modules, when a receiving end of the CU or DU receives a message, and the message carries a GTPU extension header of the GTPU slice extension header type, the message is determined to be a message slice of a target message; and according to message fragment information carried by the GTPU extension header of the message, recombining all message fragments belonging to the target message to obtain the target message. It can be seen that, in the technical solution provided in this embodiment, a packet reassembly operation is no longer performed through an IP layer, but is performed through a GTP layer, and when network packet reassembly is implemented, a CU or DU deployed with a GTPU module performs packet reassembly on a packet, so that on the basis of not increasing network elements, the requirement of a low-latency service is met as much as possible, and service pressure of the IP layer can also be relieved.

In the electronic device provided in the embodiment of the present application, from a hardware level, a schematic diagram of a hardware architecture can be seen in fig. 6. The method comprises the following steps: a machine-readable storage medium and a processor, wherein: the machine-readable storage medium stores machine-executable instructions executable by the processor; the processor is configured to execute machine-executable instructions to implement the messaging operations disclosed in the above examples.

A machine-readable storage medium is provided in embodiments of the present application that stores machine-executable instructions that, when invoked and executed by a processor, cause the processor to implement the messaging operations disclosed in the above examples.

Here, a machine-readable storage medium may be any electronic, magnetic, optical, or other physical storage device that can contain or store information such as executable instructions, data, and so forth. For example, the machine-readable storage medium may be: RAM (random Access Memory), volatile Memory, non-volatile Memory, flash Memory, a storage drive (e.g., a hard drive), a solid state drive, any type of storage disk (e.g., an optical disk, a dvd, etc.), or similar storage medium, or a combination thereof.

The systems, devices, modules or units illustrated in the above embodiments may be implemented by a computer chip or an entity, or by a product with certain functions. A typical implementation device is a computer, which may be in the form of a personal computer, laptop, cellular telephone, camera phone, smart phone, personal digital assistant, media player, navigation device, email messaging device, game console, tablet computer, wearable device, or a combination of any of these devices.

For convenience of description, the above devices are described as being divided into various units by function, and are described separately. Of course, the functionality of the units may be implemented in one or more software and/or hardware when implementing the present application.

As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

Furthermore, these computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

For the device embodiment, since it basically corresponds to the method embodiment, reference may be made to the partial description of the method embodiment for relevant points. The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the scheme of the application. One of ordinary skill in the art can understand and implement it without inventive effort.

So far, the description of the apparatus shown in fig. 6 is completed.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A message transmission method is characterized in that the method is applied to a sending end of a 5G base station, the 5G base station is provided with a centralized processing unit CU and/or a separate processing unit DU, wherein both the CU and the DU are provided with GTPU modules, and the method comprises the following steps:

obtaining a target message to be transmitted; under the condition that the sending end is a CU, the target message is a message transmitted from the CU to the DU, or under the condition that the sending end is the DU, the target message is a message transmitted from the DU to the CU;

2. The method of claim 1, wherein the determining whether to perform packet fragmentation on the target packet comprises:

obtaining the load data length of the target message;

3. The method according to claim 1, wherein the packet fragmentation information at least comprises: MF and a target message identifier Idenconfiguration;

4. The method of claim 3, wherein the packet fragmentation information further comprises: slice Offset; the Offset is an Offset of the first byte of each message fragment in the target message.

5. The method of claim 1, wherein before encapsulating the obtained packet fragment by the deployed GTPU module, the method further comprises:

if the message fragments need to carry other types of extension heads, determining whether the message fragments are the first transmitted message fragments, if so, further adding other types of extension heads to the message fragments to encapsulate the obtained message fragments through a deployed GTPU module, wherein the encapsulated message fragments at least carry the message fragments of other types of extension heads, GTPU basic heads and GTPU extension heads, and if not, executing the step of encapsulating the obtained message fragments through the deployed GTPU module.

6. A message transmission method is characterized in that the method is applied to a receiving end of a 5G base station, the 5G base station is provided with a centralized processing unit CU and/or a separation processing unit DU, wherein, both the centralized processing unit CU and the separation processing unit DU are provided with GTPU modules, the method comprises the following steps:

7. The message transmission method according to claim 6, wherein the message fragmentation information at least includes: target message identification Idenconfiguration and MF;

after determining that the packet is a packet fragment of the target packet, the method further includes: caching the corresponding relation between the message and the Idenconfiguration;

the recombining of all message fragments belonging to the target message according to the message fragment information is executed on the premise that the MF is a first value, wherein the first value is used for indicating that no message fragment to be transmitted aiming at the target message exists;

the recombining, according to the message fragment information, all message fragments belonging to the target message includes:

and recombining all cached messages corresponding to the target message identification Idenconfiguration.

8. The packet transmission method according to claim 7, wherein the packet fragmentation information further comprises: slice Offset; the Offset is the Offset of the first byte of each message fragment in the target message;

when caching the corresponding relation between the message and the Idenconfiguration, the method further comprises the following steps: caching the slice Offset;

the reconstructing all cached messages corresponding to the target message identifier Idenfication includes:

and according to the Offset sequence of each cached message fragment corresponding to the Idenconfiguration relative to the target message, recombining all messages corresponding to the Idenconfiguration.

9. A message transmission device is characterized in that the device is applied to a sending end of a 5G base station, the 5G base station is provided with a centralized processing unit CU and/or a separation processing unit DU, wherein, GTPU modules are respectively arranged in the centralized processing unit CU and the separation processing unit DU, the device comprises:

10. A message transmission device is applied to a receiving end of a 5G base station, the 5G base station deploys a centralized processing unit CU and/or a separate processing unit DU, wherein GTPU modules are deployed in both the centralized processing unit CU and the separate processing unit DU, and the device comprises:

11. An electronic device comprising a processor and a machine-readable storage medium storing machine-executable instructions executable by the processor; the processor is configured to execute machine executable instructions to perform the method steps of any of claims 1 to 8.