CN101471937B - Method and device for multiplexing and demultiplexing Ethernet packets - Google Patents

Abstract

The embodiment of the invention relates to an ether message multiplexing and de-multiplexing method and a device. The embodiment of the ether message multiplexing method comprises the following steps: receiving a sub message to be encapsulated; judging whether the sum of the length of the sub message to be encapsulated and the length of an ether message multiplexed is larger than the predetermined maximal allowable transmission length preset of the ether message when the length of the sub message to be encapsulated is less than or equal to the predetermined maximal allowable transmission length of the payload unit of the sub message; carrying out ether encapsulation and transmission to the ether message multiplexed if the sum of the length of the sub message to be encapsulated and the length of the ether message multiplexed is larger than the predetermined maximal allowable transmission length of the ether message; multiplexing the sub message to be encapsulated into the payload unit of the sub message of the ether message multiplexed if the sum of the length of the sub message to be encapsulated and the length of the ether message multiplexed is not larger than the predetermined maximal allowable transmission length of the ether message, and accumulating the length of the sub message to be encapsulated and the load length of the ether message multiplexed to obtain the load length of the current ether message. The embodiment of the invention improves the transmission efficiency of packet services and other messages and enhances the multiplexing flexibility of the messages.

Description

Method and device for multiplexing and demultiplexing Ethernet packets

technical field

The invention belongs to the technical field of networks and communications, and relates to methods and equipment for multiplexing and demultiplexing Ethernet messages.

Background technique

With the development of all-IP and flattening of the network, ATM technology has been eliminated, and the construction of SDH/PDH network using Point to Point Protocol (PPP) technology is about to stop. It has made great progress, and it is a trend of network development to use Ethernet (Ethernet) to bear the transmission of small packet services such as wireless voice.

A prior art adopts the frame encapsulation protocol (Frame Protocol, FP for short) multiplexing (Multiplexing, Mux for short) technology on the wireless UDP layer to realize the transmission of small packet services. The FPMux technology is a multiplexing technology using the User Datagram Protocol (UDP) layer between the base station (Radio Network Controller, referred to as RNC) and the 3G base station (Node of Base station, referred to as NodeB). As shown in Figure 1 Shown, RNC or NodeB carry out FPMux when sending message, demultiplex (FPDMux) when receiving guaranteed text.For NodeB, NodeB is connected with upstream RNC by Iub interface, needs to realize on the data flow direction that NodeB sends to RNC FPMux operation, supported multiplexing Channel number=NodeB supports differentiated service mark (Diffserv Code Point, be called for short DSCP) number.When receiving the downlink data that comes from RNC, need to be able to distinguish FPMux bag and normal non-Mux bag, for The Mux package needs to be demultiplexed and processed correctly. The specific packaging format of FPMux is shown in Table 1:

Table 1 is the packaging format of FPMux

The protocol stipulates that the triplet (SIP, DIP, DSCP) uniquely determines a multiplexing channel, that is, data streams with the same SIP, DIP, and DSCP values will be multiplexed into an FP Mux frame. FP Mux is a technology based on UDP to multiplex voice and other small packets. The IP/UDP Header of the message is completely reserved, and a Mux Header is added before each FP Payload. The UID is generally UDP DPORT.

This technology has the following defects: due to the existence of IP header and UDP header at the same time, some network resources are wasted; in addition, because FPMux technology is compatible with Ethernet and PPP at the same time, because SDH/PDH networks using PPP no longer have development prospects, and for Ethernet bearer The network will not need to support PPP, so if it is compatible with PPP, some network resources will be wasted.

Another prior art adopts an intelligent time-division multiplexing (Intelligent Time-Division Multiplexing, ITDM for short) technology to realize the transmission of small packet services. ITDM technology is based on TDM technology and can connect various networks (including IP network, PSTN/POTS network). A schematic diagram of an encapsulation structure of a specific ITDM field is shown in FIG. 2 . The description of Figure 2 is as follows: DMAC represents the traditional destination MAC address, 6 bytes long; SMAC represents the traditional source MAC address, 6 bytes long; Ether Type represents the message type is ITDM, 2 bytes long; DMAC, SMAC, Ether Type Constitutes the MAC Header; PAD indicates the reserved padding field, 6 bytes long; TAG indicates a 2-byte packet ID (16-bit Packet ID specifies JitterQueue on Destination Node) and a 1-byte serial number; PKT Type: indicates yes Ordinary ITDM messages are still ITDMCP control messages; PAD\TAG and PKT Type form ITDM Shim; Payload indicates the message payload, and each Quad TDM Segment in the Payload package contains 4 TDM Segments and 4 Segment IDs, and the lengths are respectively Fixed 8 bytes vs 2 bytes. When there are 24 TDMSegments encapsulated in the Payload, there can be n=6 Quad TDM Segments accordingly. A maximum of 148 TDM Segments can be encapsulated in the Payload, correspondingly there can be a maximum of n=37 Quad TDM Segments.

This technology has the following defects: it only supports fixed-length message encapsulation, which is inflexible; even for small voice packets, it needs to occupy multiple TDM Segments (the typical length of voice packets is 22 bytes); it does not support message priority; it uses TDM The microcode implementation of the technology is relatively complicated, and the software complexity is high, and special hardware may be required for implementation; network transmission requires E1/T1 similar accurate clock guarantees, and the cost is relatively high.

Contents of the invention

The first aspect of the present invention is to provide an Ethernet message multiplexing method and equipment, so as to improve the transmission efficiency of messages such as small packet services.

The second aspect of the present invention is to provide a method and device for demultiplexing Ethernet messages, so as to improve the demultiplexing efficiency of Ethernet messages.

In order to realize the first aspect above, an embodiment of the present invention provides a method for multiplexing Ethernet packets, which includes: receiving sub-messages to be encapsulated; when the length of the sub-messages to be encapsulated is less than or equal to the sub-message When the preset maximum allowable length of the payload unit, it is judged whether the sum of the length of the sub-message to be encapsulated and the length of the multiplexed Ethernet message is greater than the preset maximum allowable transmission length of the Ethernet message; if so, Then carry out Ethernet encapsulation and send to the multiplexed Ethernet message, and multiplex the sub-message to be encapsulated into a new Ethernet message; if not, then multiplex the sub-message to be encapsulated into the multiplexed In a sub-message payload unit of the Ethernet message, and the length of the sub-message to be encapsulated is added to the load length of the multiplexed Ethernet message to obtain the load length of the current Ethernet message, wherein The sub-message payload unit includes a multiplexing header and a sub-message payload, the sub-message payload carries the sub-message to be multiplexed, and the multiplexing header includes the sub-message of the to-be-encapsulated sub-message length information.

In order to realize the above-mentioned first aspect, an embodiment of the present invention also provides an Ethernet message multiplexing device, which includes: a receiving module, a judging module, a first encapsulation module, a multiplexing module, and an accumulation module; the receiving module is used for Receive the sub-message to be encapsulated; the judging module is connected to the receiving module, and when it is judged that the length of the sub-message to be encapsulated is less than or equal to the preset maximum allowable length of the sub-message payload unit, continue to judge Whether the sum of the length of the sub-message to be encapsulated and the length of the multiplexed Ethernet message is greater than the preset maximum allowable transmission length of the Ethernet message, if so, then call the first encapsulation module to The message is encapsulated and sent by Ethernet, and at the same time, the multiplexing module is called to multiplex the sub-message to be encapsulated into a new Ethernet message; if not, the multiplexing module is called to multiplex the sub-message to be encapsulated In a sub-message payload unit of the Ethernet message that has been multiplexed, the sub-message payload unit includes a multiplexing header and a sub-message payload, and the sub-message payload carries the sub-message to be multiplexed. message, the multiplexing header includes the length information of the sub-message to be encapsulated; at the same time, the accumulation module is called to add the length of the sub-message to be encapsulated to the load length of the multiplexed Ethernet message to obtain the current The payload length of the Ethernet packet.

In the embodiment of the above-mentioned Ethernet message multiplexing method and device, by adding a multiplexing header at the front end of each sub-message payload, to represent the type and length of the business content carried by the sub-message payload, which is different from the existing Compared with the original UDP/IP header, it saves network resources and improves the utilization rate of network resources; at the same time, the sub-message payload unit is set according to the actual length of the sub-message, which is different from the existing method of multiplexing messages with a fixed length. Compared with this method, the occupation of additional resources is avoided, and the flexibility of packet consumption is enhanced.

In order to realize the above-mentioned second aspect, an embodiment of the present invention provides a method for demultiplexing an Ethernet message, which includes: receiving the Ethernet message; extracting the payload length unit and at least one sub-message net in the Ethernet message; A load unit, the sub-message payload unit includes a sub-message payload and a multiplexing header, the multiplexing header includes length information of the sub-message payload unit, and the payload length unit includes the According to the length information of the sub-message payload, demultiplex the sub-message payload in the sub-message payload unit; judge whether the length of the demultiplexed message is equal to the If it is the payload length of the Ethernet message, then stop the demultiplexing operation; otherwise, continue to demultiplex the next sub-message payload unit until the length of the demultiplexed message is equal to the payload length of the Ethernet message.

In order to realize the above-mentioned second aspect, an embodiment of the present invention also provides an Ethernet message demultiplexing device, which includes: a receiving module for receiving encapsulated Ethernet messages; a demultiplexing module connected to the receiving module, It is used to demultiplex the sub-message payload in the sub-message payload unit according to the length information of the sub-message payload in the multiplexing header in the sub-message payload unit; the first judging module, and The demultiplexing module is connected to determine whether the length of the demultiplexed message is equal to the payload length of the Ethernet message, and if so, stop the demultiplexing operation; otherwise, call the demultiplexing module to continue demultiplexing the next subgram Text payload unit until the length of the demultiplexed message is equal to the payload length of the Ethernet message.

In the embodiments of the above-mentioned Ethernet message demultiplexing method and device, it is used to characterize the type of business content carried by the sub-message payload directly according to what is carried in the multiplexing header added to the front end of each sub-message payload. and length information to realize the demultiplexing of Ethernet packets, thereby improving the efficiency of demultiplexing.

Description of drawings

Fig. 1 is a schematic flow diagram of multiplexing and demultiplexing in the prior art;

FIG. 2 is a schematic structural diagram of a multiplexing message based on ITDM technology in the prior art;

Fig. 3 is a structural representation of the Ethernet message involved in the embodiment of the present invention;

Fig. 4 is the schematic flow chart diagram of message multiplexing and demultiplexing between RNC and NodeB based on Ethernet bearer network in the embodiment of the present invention;

Fig. 5 is the flowchart of Embodiment 1 of a kind of Ethernet packet multiplexing method of the present invention;

Fig. 6 is the flowchart of Embodiment 2 of a kind of Ethernet packet multiplexing method of the present invention;

Fig. 7 is the flow chart of Embodiment 1 of a kind of Ethernet packet demultiplexing method of the present invention;

Fig. 8 is the flowchart of Embodiment 2 of a kind of Ethernet message demultiplexing method of the present invention;

FIG. 9 is a schematic structural diagram of Embodiment 1 of an Ethernet packet multiplexing device according to the present invention;

10 is a schematic structural diagram of Embodiment 2 of an Ethernet packet multiplexing device according to the present invention;

11 is a schematic structural diagram of Embodiment 3 of an Ethernet packet multiplexing device according to the present invention;

12 is a schematic structural diagram of Embodiment 4 of an Ethernet packet multiplexing device according to the present invention;

13 is a schematic structural diagram of Embodiment 1 of an Ethernet packet demultiplexing device according to the present invention;

14 is a schematic structural diagram of Embodiment 2 of an Ethernet packet demultiplexing device according to the present invention;

FIG. 15 is a schematic structural diagram of Embodiment 3 of an Ethernet packet demultiplexing device according to the present invention.

Detailed ways

The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

FIG. 3 is a schematic structural diagram of an Ethernet packet involved in an embodiment of the present invention. The description of the Ethernet message is as follows:

1. DMAC represents the traditional destination MAC address, 6 bytes long;

2. SMAC means traditional source MAC address, 6 bytes long;

3. VLAN TAG (Optional, optional) means traditional 802.1p/q, 4 bytes long;

4. Service Tag indicates that the message is an Ethernet Mux message, and provides QoS and message order protection functions at the same time. The description of the internal field is: TYPE indicates the payload type, 0x9910, demultiplexing (DMux) flag, 2 bytes Long; Pri represents priority information, similar to DSCP, and its length is 3bit long in this embodiment; Res represents the reserved length, and its length is 1 bit long in this embodiment; Sequence represents message order preservation information, such as for The serial number of message order, in the present embodiment, its length can be 12bit long; Total Length is the load length unit of Ethernet message, wherein preserves the load length of Ethernet message, and described load length is with byte as unit.

5. FCS represents a checksum, which is used for a 32-bit cyclic redundancy check (Cyclic Redundancy Check, referred to as CRC) check, and its length is 4 bytes long in this embodiment.

6. Payload is the payload of the message, 0-1496 bytes to comply with the Ethernet frame length limit of 64-1518 bytes. When the payload length is insufficient, there is a Padding field in the frame, with a maximum of 42 bytes. Each sub-message is multiplexed in the Payload, and a multiplexing header MuxHeader (3-4 bytes) is added before each sub-message payload Sub Payload to form a sub-message payload unit, and the receiving end device will for demultiplexing. The description of the Mux Header subfield is as follows: UID represents the user identifier, which can be 16bit long in this embodiment, and the user can customize it according to the business type; E: 1bit, indicating whether there is an extension field; Length: 7bit, indicating the net content of the sub-message The length of the payload; Extend: 8bit, users can make custom extensions in Extend; the multiplexed packets in Payload can be of any type, such as ATM cell or PPP packets.

7. Padding (Optional, optional) field. When the length of the payload in the Payload is insufficient, the frame contains the Padding field.

Wherein, in this embodiment, the payload length is the length information of the message payload. In other optional embodiments, the payload length can also be the length information of the message payload and the above-mentioned DMAC, SMAC , Vlan TAG, Service Tag, Padding, FCS, or the sum of the lengths of several of them.

Taking the multiplexing and demultiplexing of Ethernet packets between 3G NodeB equipment and RNC equipment as an example, the method for multiplexing and demultiplexing Ethernet packets of the present invention will be described in detail below.

Fig. 4 is a schematic flowchart of message multiplexing and demultiplexing between NodeB and RNC based on Ethernet bearer network in the present invention. As shown in Figure 4, the message multiplexing and demultiplexing between NodeB and RNC includes the following aspects:

1. The NodeB side implements Ethernet multiplexing of packets of a certain type of service, and correspondingly, the RNC side implements Ethernet demultiplexing;

2. The RNC side implements Ethernet multiplexing of a certain type of service message, and correspondingly, the NodeB side implements Ethernet demultiplexing;

3. Use Ethernet to carry multiplexed packets.

Taking voice service packets, that is, voice packet multiplexing as an example, the SubPayload in Figure 3 is Voice Payload.

In the NodeB->RNC direction, multiple sub-messages from end users are multiplexed into the Payload at NodeB, encapsulated according to the type and length of the message, and then encapsulated with ordinary Ethernet, and the Ethernet bearer network performs L2 forwarding. , if the TYPE field in the Service Tag indicates that the message is an Ethernet Mux, the message will be demultiplexed according to the Mux Header.

The processing flow in the RNC->NodeB direction is similar, except that the RNC performs packet multiplexing and encapsulation, while the NodeB performs packet demultiplexing.

An embodiment of the present invention provides a method for multiplexing Ethernet packets, which includes: receiving sub-messages to be encapsulated; when the length of the sub-messages to be encapsulated is less than or equal to the preset maximum When the length is allowed, it is judged whether the sum of the length of the sub-message to be encapsulated and the length of the multiplexed Ethernet message is greater than the preset maximum allowable transmission length of the Ethernet message. Ethernet encapsulation and sending of the message, and multiplex the sub-message to be encapsulated into a new Ethernet message; if not, multiplex the sub-message to be encapsulated into the message net of the multiplexed Ethernet In a sub-message payload unit in the load, the sub-message payload unit includes a multiplexing header and a sub-message payload, and the sub-message payload carries the sub-message to be multiplexed, and the The multiplexing header includes the length information of the sub-message to be encapsulated and the user identification; and the length of the sub-message to be encapsulated is added to the payload length of the Ethernet message.

Let the length of the sub-message to be encapsulated be PKT_SIZE, the preset maximum allowable length of a single Sub Payload is MAX_PAYLOAD_SIZE, the length of the multiplexed Ethernet message is OLD_MUX_SIZE, and the preset maximum allowable transmission length of the Ethernet message is MTU.

FIG. 5 is a flow chart of Embodiment 1 of an Ethernet packet multiplexing method according to the present invention. As shown in Figure 5, the Ethernet packet multiplexing method comprises the following steps:

Step 101: Receive sub-messages to be encapsulated. The sub-message to be encapsulated in this embodiment takes a voice message as an example.

Step 102, judge whether Ethernet multiplexing (Ethernet Mux) is enabled, if enable and execute step 104, otherwise execute step 103.

Step 103: Perform traditional Ethernet encapsulation on the voice message to be encapsulated and send it.

Step 104, judge whether the length PKT_SIZE of the voice message to be encapsulated is greater than the preset maximum allowable length MAX_PAYLOAD_SIZE of a single sub-message payload unit, if so, then perform step 105; otherwise, then perform step 106;

Step 105, perform Ethernet encapsulation on the multiplexed Ethernet message and send it, and perform traditional Ethernet encapsulation on the voice message to be encapsulated and send it. It specifically includes step 1051, performing Ethernet encapsulation on the multiplexed Ethernet message and sending it; and step 1052, performing traditional Ethernet encapsulation on the voice message to be encapsulated and sending it.

Step 106, judge whether the sum of the length PKT_SIZE of the voice message to be encapsulated and the length OLD_MUX_SIZE of the multiplexed Ethernet message is greater than the preset maximum allowable transmission length MTU of the Ethernet message; if so, then perform step 107; if If not, go to step 108.

Step 107, perform Ethernet encapsulation on the multiplexed Ethernet message and send it, and simultaneously multiplex the sub-messages to be encapsulated into a new Ethernet message. It specifically includes step 1071, performing Ethernet encapsulation on the multiplexed Ethernet message and sending it; and step 1072, multiplexing sub-messages to be encapsulated into a new Ethernet message.

Step 108, multiplex the sub-message to be encapsulated into a sub-message payload unit of the multiplexed Ethernet message. The sub-message payload unit includes a multiplexing header and a sub-message payload, the sub-message payload carries the voice message to be multiplexed, and the multiplexing header includes the voice message to be encapsulated The length information may also include the user identifier of the voice message to be encapsulated.

Step 109: Add the length of the voice packet to be encapsulated to the payload length of the multiplexed Ethernet packet to obtain the payload length of the current Ethernet packet. That is, add the length of the voice packet to be encapsulated in the Total Length field in the Service Tag.

The above steps 101 to 109 are a complete process for multiplexing a voice message to be encapsulated into an Ethernet message. When receiving more than one sub-message, such as a voice message but not limited to a voice message, a timer can be set in the device receiving the sub-message. Packets are encapsulated and sent.

FIG. 6 is a flow chart of Embodiment 2 of an Ethernet packet multiplexing method according to the present invention. As shown in Figure 6, the difference between this embodiment and the previous embodiment is that after the step 109, it also includes:

Step 110, start the timer;

Step 111 , judge whether it is timed out according to the timer, if not timed out, continue to receive new sub-messages, and execute step 101 ; if timed out, execute step 112 .

Step 112: Encapsulate and send the currently multiplexed Ethernet packet.

In the above embodiment of the Ethernet packet multiplexing method, the payload length of the Ethernet packet may also be carried in the status flag information Service Tag of the Ethernet packet as shown in FIG. 3 .

The structural diagram of the Ethernet message shown in Figure 3 can also carry the following information or a combination of the following information in the service tag information ServiceTag: the multiplexing type information TYPE of the Ethernet message, the priority information of the multiplexing message Pri, or the sequence preservation information Sequence of the multiplexed message. When the ServiceTAG includes TYPE, Pri, and Sequence at the same time, before encapsulating the multiplexed Ethernet message, it also includes: setting the multiplexing type information TYPE of the Ethernet message in the Service Tag to Ethernet multiplexing, that is, specifying the Service The TYPE in the Tag is 0x9910, and this value can be customized; the priority information pri of the multiplexed message is set in the Service Tag, and pri can be specified according to the Qos requirements. The Sequence can be specified according to the packet order preservation requirements. The setting steps of the above three parameters are not limited.

FIG. 7 is a flow chart of Embodiment 1 of an Ethernet packet demultiplexing method according to the present invention. As shown in Figure 7, the Ethernet packet demultiplexing method comprises the following steps:

Step 201, receiving an Ethernet message.

Step 202, judge whether the multiplexing type information TYPE in the Ethernet message is Ethernet multiplexing, if not, execute step 203; if yes, execute step 204. In this embodiment, it is judged whether the TYPE in the Service Tag is 0x9910.

Step 203: Demultiplex the Ethernet message in a common Ethernet demultiplexing manner.

Step 204, extracting the payload length unit and at least one sub-message payload unit in the Ethernet message, the sub-message payload unit and the multiplexing header are included in the sub-message payload unit, and in the multiplexing header It includes length information of the sub-message payload unit, and the payload length unit includes the payload length of the Ethernet message.

Step 205: Demultiplex the sub-message payload in the sub-message payload unit according to the length information of the sub-message payload. Wherein, according to the length of the sub-message payload in the Mux Header in the sub-message payload unit, the business content carried in the sub-message payload Sub Payload in the sub-message payload unit is demultiplexed.

Step 206: Send the business content to the corresponding upper-layer application program for processing according to the user identification UID in the Mux Header.

Step 207, judge whether the length of the demultiplexed message is equal to the load length of the ether message, if so, then perform step 208; otherwise, perform step 205, continue to demultiplex the next sub-message net in this ether message load unit until the length of the demultiplexed message is equal to the payload length of the Ethernet message. Demultiplexing includes: demultiplexing of message payload and demultiplexing of information related to the multiplexed message. The demultiplexing of the message payload is to demultiplex the sub-message payload in the message payload. Information related to multiplexed packets includes MAC, Vlan TAG, Service Tag, Padding, and FCS. In this embodiment, because the load length in the Ethernet message is the length information of the message payload Pay Load, it is only necessary to compare whether the total length of the demultiplexed sub-message payload unit is equal to the load length . In other optional implementation manners, the payload length may also be one or more of the information (DMAC, SMAC, Vlan TAG, Service Tag, Padding, FCS) related to the message payload and the above-mentioned multiplexing message. Therefore, in the comparison process, judging whether the length of the demultiplexed message is equal to the payload length of the Ethernet message is the total length of the demultiplexed sub-message payload unit plus the multiplexed Whether the length of the information related to the packet is equal to the payload length of the Ethernet packet.

Step 208, stop the demultiplexing operation of the current Ethernet message.

When the priority information of the multiplexing message is set in the service flag unit of the Ethernet message, before demultiplexing the sub-message payload in the sub-message payload unit, it also includes: performing flow according to the priority information Classification and priority scheduling.

When the order preservation information of the multiplexing message is set in the service flag unit of the Ethernet message, before demultiplexing the sub-message payload in the sub-message payload unit, it also includes: sequential processing.

FIG. 8 is a flow chart of Embodiment 2 of an Ethernet packet demultiplexing method according to the present invention. The difference between this embodiment and the previous embodiment lies in the addition of flow classification and priority scheduling operations and order-preserving processing operations. Specifically between step 202 and step 204 also includes:

Step 209: Perform flow classification and priority scheduling according to the priority information Pri in the service tag information Service Tag. When the upper layer application specifies to deploy QoS according to the priority, flow classification and priority scheduling are performed according to the priority information Pri in the service tag information Service Tag, such as QoS based on simple flow classification or complex flow classification.

Step 210, perform sequence preservation processing according to the sequence preservation information Sequence in the service tag information Service Tag. When the upper-layer application specifies the serial number of the packet, the sink can correct the order of the received sub-messages according to the serial number, and the packets with smaller serial numbers will be processed by the upper-layer application first, and TCP Similar frame loss detection and retransmission mechanism. The sub-messages described in the foregoing embodiments are not limited to the packet services carried by the Ethernet bearer network, such as wireless voice services; they may also include sub-messages from SDH/PDH networks, ATM networks, PSTN/POTS and other networks, providing similar For the bearer of PPPoE and ATMoE, packets are multiplexed and encapsulated at the sending end, and demultiplexed at the receiving end. Each network is connected to the access device and server device of the Ethernet bearer network as the core device. The ATM network in the above figure is an example, the main functions include:

1. Multiple ATM cells are multiplexed into Ethernet packets when leaving the ATM network;

2. On the server side, realize the demultiplexing of the Ethernet message to obtain each ATM cell.

The multiplexed message (or cell) performs Ethernet packet encapsulation on the device (or server) that connects the source network to the Ethernet bearer network. ) for demultiplexing.

ATM cells, PPP packets, and ordinary IP packets can be multiplexed in this way and then transmitted on the Ethernet bearer network, and demultiplexed at the receiving end to provide a transmission mode similar to ATMoE and PPPoE.

FIG. 9 is a schematic structural diagram of Embodiment 1 of an Ethernet packet multiplexing device according to the present invention. As shown in Figure 9, it includes: a receiving module 11, a judging module 12, a first encapsulation module 13, a multiplexing module 14 and an accumulation module 15; wherein, the receiving module 11 is used to receive sub-messages to be encapsulated; the judging module 12 , connected to the receiving module 11, when it is judged that the length of the sub-message to be encapsulated is less than or equal to the preset maximum allowable length of the sub-message payload unit, continue to judge the length of the sub-message to be encapsulated and the length of the sub-message to be encapsulated Whether the sum of the lengths of the multiplexed Ethernet packets is greater than the preset maximum allowable transmission length of the Ethernet packets;

If so, then call the first encapsulation module 13, carry out ether encapsulation and send to the multiplexed ether message, call the multiplexing module 14 simultaneously, multiplex the sub-message to be encapsulated to a new ether message;

If not, then call the multiplexing module 14, the sub-message to be encapsulated is multiplexed in a sub-message payload unit of the Ethernet message that has been multiplexed, and the sub-message payload unit includes a multiplexing header and Sub-message payload, the sub-message payload carries the sub-message to be multiplexed, and the multiplexing header includes the length information and the user identification of the sub-message to be encapsulated; call the accumulation module 15 simultaneously, and The length of the sub-message to be encapsulated is added to the payload length of the multiplexed Ethernet packet to obtain the payload length of the current Ethernet packet. In this embodiment, the multiplexing header in the payload unit of the sub-message may further include the user identifier of the sub-message to be encapsulated.

FIG. 10 is a schematic structural diagram of Embodiment 2 of an Ethernet packet multiplexing device according to the present invention. As shown in Figure 10, the difference between this embodiment and the first embodiment of the above-mentioned Ethernet packet multiplexing device is that it can also include a first expansion module 16, which is used to set the Ethernet packet in the service flag unit of the Ethernet packet. The multiplexing type information is Ethernet multiplexing; it can also include a second extension module 17, which is used to set the priority information of the multiplexing message in the service flag unit of the ether message; it can also include the third extension module 18, which can be used to The sequence preservation information of the multiplexed message is set in the service flag unit of the Ethernet message.

When more than one sub-message is received, a timing sub-module can be set in the device receiving the sub-message, and when no new sub-message arrives after timeout, the Ethernet message is encapsulated and sent. FIG. 11 is a schematic structural diagram of Embodiment 3 of an Ethernet packet multiplexing device according to the present invention. As shown in Figure 11, the difference between this embodiment and the first embodiment of the above-mentioned Ethernet packet multiplexing device is that a certain timing sub-module 1201 is also included in the judging module 12. After the length is added to the load length of the multiplexed Ethernet message to obtain the load length of the current Ethernet message, the timing sub-module 1201 starts counting, and when no next sub-message arrives at the receiving module 11 within a predetermined time , the first encapsulation module 13 performs Ethernet encapsulation on the currently multiplexed Ethernet packets and sends them.

FIG. 12 is a schematic structural diagram of Embodiment 4 of an Ethernet packet multiplexing device according to the present invention. As shown in Figure 12, in this embodiment, the difference from the first embodiment of the above-mentioned Ethernet message multiplexing device is that it also includes a second encapsulation module 19, when the judging module 12 judges the length of the sub-message to be encapsulated When greater than the preset maximum allowable length of the sub-message payload unit, the first encapsulation module 13 is called to encapsulate and send the multiplexed Ethernet message, and the second encapsulation module 19 is called simultaneously to encapsulate the packet to be encapsulated. The sub-message is encapsulated by traditional Ethernet and sent.

FIG. 13 is a schematic structural diagram of Embodiment 1 of an Ethernet packet demultiplexing device according to the present invention. As shown in Figure 12, comprise: receiving module 21, be used to receive the Ethernet packet of encapsulation; The length information of the sub-message payload, demultiplex the sub-message payload in the sub-message payload unit; the first judging module 24 is connected with the demultiplexing module 22, and judges the length of the demultiplexed message Whether it is equal to the load length of the Ethernet message, if so, then stop the demultiplexing operation; otherwise, call the demultiplexing module 23, continue to demultiplex the next sub-message payload unit, until the length of the demultiplexed message The sum is equal to the payload length of the Ethernet packet. The Ethernet packet demultiplexing device in this embodiment also includes a sending module 23, which is connected to the demultiplexing module 22, and is used to send the business content to the corresponding upper-layer application program for processing according to the user identification in the multiplexing header .

FIG. 14 is a schematic structural diagram of Embodiment 2 of an Ethernet packet demultiplexing device according to the present invention. As shown in Figure 14, the difference between this embodiment and the first embodiment of the above-mentioned Ethernet message demultiplexing device is that it can also include a priority scheduling module 25, when the service flag unit of the Ethernet message is provided with the Priority information is used to perform flow classification and priority scheduling according to the priority information before demultiplexing the sub-message payload in the sub-message payload unit. It can also include a sequence processing module 26, which is used for demultiplexing before the sub-message payload in the sub-message payload unit , performing order preservation processing according to the order preservation information.

FIG. 15 is a schematic structural diagram of Embodiment 3 of an Ethernet packet demultiplexing device according to the present invention. As shown in Figure 15, the difference between this embodiment and the above-mentioned Ethernet packet demultiplexing device embodiment one is that it also includes a second judging module 27, which is connected with the receiving module 21, and when the Ethernet packet is set in the service flag unit of the Ethernet packet When the multiplexing type information of the message is Ethernet multiplexing, before demultiplexing the sub-message payload in the sub-message payload unit, the second judging module 27 is used to judge the Whether the multiplexing type of the Ethernet message is Ethernet multiplexing, if so, then call the demultiplexing module 22, according to the length information of the sub-message payload in the multiplexing header in a sub-message payload unit, demultiplex Use this sub-message payload unit to neuter the sub-message payload.

In the above embodiments of the present invention, a method of directly multiplexing multiple sub-messages into Ethernet messages and carrying out Layer 2 transmission on the Ethernet bearer network is provided. UDP/IP headers are no longer used, and each sub-message is preceded by adding A Mux Header to represent the type and length of the business content carried by the payload of the message, and extend the EtherType field of traditional Ethernet to TYPE to support the identification, QoS and message order of the Ethernet Mux frame, and support the traditional 802.1p/q and common Ethernet encapsulation.

In summary, the present invention has the following advantages:

(1) The transmission efficiency is further improved, the flexibility and QoS characteristics are enhanced, the implementation is simpler, and the development and operation costs are further reduced.

(2) The IP header/UDP header is removed, and a Mux Header is added before each sub-message to represent the type and length of the business content carried by the message payload, thereby saving network resources and improving improved network resource utilization;

(3) Aiming at but not limited to small-packet services that can be multiplexed in large quantities, provide a method that can carry various types of network packets for multiplexed transmission.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent replacements are made to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims (24)

1. A method for multiplexing ether packets, characterized in that, comprising: Receive the sub-message to be encapsulated; When the length of the sub-message to be encapsulated is less than or equal to the preset maximum allowable length of the sub-message payload unit, judge the sum of the length of the sub-message to be encapsulated and the length of the multiplexed Ethernet message Whether it is greater than the preset maximum allowable transmission length of the Ethernet message; If so, perform Ethernet encapsulation on the multiplexed Ethernet message and send it, and multiplex the sub-message to be encapsulated into a new Ethernet message; If not, the sub-message to be encapsulated is multiplexed into a sub-message payload unit of the multiplexed Ethernet message, and the length of the sub-message to be encapsulated is added to the multiplexed Ethernet message. The load length of text obtains the load length of current Ethernet message, wherein said sub-message payload unit comprises multiplexing header and sub-message payload, and said sub-message payload carries the sub-message to be multiplexed , the multiplexing header includes length information of the sub-package to be encapsulated. 2. The method according to claim 1, wherein the multiplexing header further includes a user identifier of the sub-message to be encapsulated. 3. method according to claim 1, it is characterized in that, after the load length of the Ethernet message of multiplexing the length of the sub-message to be encapsulated is added up to obtain the current load length of the Ethernet message, it also includes : When no next sub-message arrives within the predetermined time, perform Ethernet encapsulation on the currently multiplexed Ethernet message and send it. 4. The method according to claim 1, wherein, when the length of the sub-message to be encapsulated is greater than the preset maximum allowable length of the sub-message payload unit, the multiplexed Ethernet message is carried out Ethernet encapsulation and sending, and at the same time perform traditional Ethernet encapsulation and sending on the sub-message to be encapsulated. 5. The method according to claim 1, characterized in that, before said carrying out Ethernet encapsulation to the multiplexed Ethernet message, it also includes: setting the multiplex number of the Ethernet message in the service flag unit of said Ethernet message Use type information for Ethernet multiplexing. 6. method according to claim 1, is characterized in that, before described carrying out Ethernet encapsulation to the multiplexed Ethernet message, also comprises: setting the multiplexing message of this multiplexed message in the service mark unit of described Ethernet message priority information. 7. The method according to claim 1, characterized in that, before said multiplexed Ethernet message is carried out to Ethernet encapsulation, it also includes: setting the value of the multiplexed message in the service flag unit of said Ethernet message Order information. 8. A method for demultiplexing Ethernet packets, characterized in that, comprising: Receive Ethernet message; Extract the load length unit and at least one sub-message payload unit in the Ethernet message, the sub-message payload unit includes a sub-message payload and a multiplexing header, and the multiplexing header includes the length information of the sub-message payload unit, the payload length unit includes the payload length of the Ethernet message; Demultiplexing the sub-message payload in the sub-message payload unit according to the length information of the sub-message payload; Determine whether the length of the demultiplexed message is equal to the payload length of the Ethernet message, if so, stop the demultiplexing operation; otherwise, continue to demultiplex the next sub-message payload unit until demultiplexed The length of the packet is equal to the payload length of the Ethernet packet. 9. The method according to claim 8, wherein the multiplexing header also includes the user identification of the sub-message to be encapsulated, and the demultiplexing sub-message payload in the sub-message payload unit After that, it also includes: sending the business content to the corresponding upper layer application program for processing according to the user identification in the multiplexing header. 10. The method according to claim 8, characterized in that, the Ethernet message also includes a service flag unit, the service flag unit is provided with multiplexing type information, and in the extracted sub-message payload unit The method previously also includes: judging whether the multiplexing type of the Ethernet message is Ethernet multiplexing according to the multiplexing type information. 11. The method according to claim 8, wherein the Ethernet message also includes a service flag unit, the service flag unit is provided with the priority information of the multiplexing message, and the demultiplexing subgram Before the sub-message payload in the text payload unit, flow classification and priority scheduling are performed according to the priority information. the 12. The method according to claim 8, wherein the Ethernet message also includes a service flag unit, the service flag unit is provided with sequence-preserving information of the multiplexed message, and the demultiplexed subgram Before the sub-message payload in the text payload unit, it also includes: performing order preservation processing according to the order preservation information. the 13. A kind of Ethernet packet multiplexing equipment, is characterized in that, comprises: receiving module, judging module, the first packaging module, multiplexing module and accumulating module; The receiving module is used to receive the sub-message to be encapsulated; Judging module, connected with the receiving module, when it is judged that the length of the sub-message to be encapsulated is less than or equal to the preset maximum allowable length of the sub-message payload unit, continue to judge the length of the sub-message to be encapsulated Whether the sum of the length and the length of the multiplexed Ethernet message is greater than the preset maximum allowable transmission length of the Ethernet message, if so, the first encapsulation module is called to encapsulate and send the multiplexed Ethernet message, At the same time, the multiplexing module is called to multiplex the sub-message to be encapsulated into a new Ethernet message; if not, the multiplexing module is called to multiplex the sub-message to be encapsulated into the multiplexed Ethernet message. In a sub-message payload unit, the sub-message payload unit includes a multiplexing header and a sub-message payload, and the sub-message payload carries the sub-message to be multiplexed, and the multiplexing header Including the length information of the sub-message to be encapsulated; at the same time, the accumulation module is called to add the length of the sub-message to be encapsulated to the payload length of the multiplexed Ethernet packet to obtain the payload length of the current Ethernet packet. the 14. The device according to claim 13, wherein the multiplexing header in the sub-message payload unit further includes a user identifier of the sub-message to be encapsulated. the 15. The device according to claim 13, wherein the judging module includes a timing sub-module, when the accumulation module adds the length of the sub-message to be encapsulated to the load length of the multiplexed Ethernet message to obtain After the load length of the current Ethernet message, the timing sub-module starts counting, and when no next sub-message arrives at the receiving module within a predetermined time, the first encapsulation module performs multiplexing on the currently multiplexed Ethernet message Carry out ether encapsulation and send. the 16. The device according to claim 13, further comprising a second encapsulation module, when the judging module determines that the length of the sub-message to be encapsulated is greater than the preset maximum of the sub-message payload unit When the length is allowed, the first encapsulation module is invoked to encapsulate and send the multiplexed Ethernet message, and the second encapsulation module is called at the same time to perform traditional Ethernet encapsulation and transmission on the sub-message to be encapsulated. the 17. The device according to claim 13, further comprising a first extension module, configured to set the multiplexing type information of the Ethernet message to Ethernet multiplexing in the service flag unit of the Ethernet message. 18. The device according to claim 13, further comprising a second extension module, configured to set the priority information of the multiplexed message in the service flag unit of the Ethernet message. 19. The device according to claim 13, further comprising a third extension module, configured to set the order preservation information of the multiplexed message in the service flag unit of the Ethernet message. 20. An Ethernet message demultiplexing device, characterized in that, comprising: A receiving module, configured to receive encapsulated Ethernet packets; The demultiplexing module is connected with the receiving module, and is used for demultiplexing the submessage in the submessage payload unit according to the length information of the submessage payload in the multiplexing header in the submessage payload unit text payload; The first judging module is connected with the demultiplexing module, and judges whether the length of the demultiplexed message is equal to the load length of the Ethernet message, if so, stops the demultiplexing operation; otherwise, calls the demultiplexing module to continue demultiplexing The next sub-message payload unit is multiplexed until the length of the demultiplexed message is equal to the payload length of the Ethernet message. 21. The device according to claim 20, further comprising a sending module connected to the demultiplexing module for sending the demultiplexed sub-message payload to The corresponding upper layer application process. 22. The device according to claim 20, further comprising a second judging module, connected to the receiving module, when the multiplexing type information of the Ethernet message is set as Ethernet multiplexing in the service flag unit of the Ethernet message When, before demultiplexing the sub-message payload in the sub-message payload unit, the second judging module is used to judge whether the multiplexing type of the Ethernet message is Ethernet multiplexing according to the multiplexing type information, If so, call the demultiplexing module. the 23. The device according to claim 20, further comprising a priority scheduling module, when the priority information of the multiplexing message is set in the service flag unit of the Ethernet message, it is used for demultiplexing Before the sub-message payload in the message payload unit, flow classification and priority scheduling are performed according to the priority information. the 24. The device according to claim 20, further comprising an order-keeping processing module, which is used for demultiplexing when the order-keeping information of the multiplexing message is set in the service flag unit of the Ethernet message. Before the payload of the sub-message in the message payload unit, perform order-preserving processing according to the order-preserving information. the

Images