WO2017024571A1

WO2017024571A1 - Packet processing method, apparatus and system

Info

Publication number: WO2017024571A1
Application number: PCT/CN2015/086810
Authority: WO
Inventors: 李勇; 徐进; 李晓刚
Original assignee: 华为技术有限公司
Priority date: 2015-08-12
Filing date: 2015-08-12
Publication date: 2017-02-16
Also published as: CN107210973A; CN107210973B

Abstract

An embodiment of the present invention provides a packet processing method. The method comprises: receiving packets from a user end terminal; when it is identified that the received packets are IP packets, performing flow classification on the packets according to source IP addresses in packet headers; and when it is identified that the received packets are ARP packets, performing flow classification on the packets according to sender IP addresses in packet payloads; and sending, by means of corresponding service flows, the packets on which flow classification has been performed. An embodiment of the present invention further provides a cable modem. By means of the embodiments provided in the present invention, service packets in a hybrid fiber coaxial network can be accurately corresponded to corresponding service flows.

Description

Message processing method, device and system

Technical field

The present invention relates to the field of data communications, and in particular to a message processing method, apparatus and system.

Background technique

The Data Over Cable Service Interface Specification (DOCSIS) is a technical standard for bidirectional transmission in Hybrid Fiber Coaxial (HFC). Figure 1 depicts the architecture of a coaxial network. In this standard, a Cable Modem Termination System (CMTS) belongs to a central office device and connects a coaxial cable network to an upper layer network. Cable Modem (CM) is a terminal device used to connect Customer Premises Equipment (CPE) to the coaxial cable network; the CMTS and CM complete the process of interactive transmission of data signals on the analog channel. Among them, the data link from the CMTS to the CM is called the downlink, and the data link from the CM to the CMTS is called the uplink.

The CMTS and the CM transmit multiple services, such as a broadband service, a voice service, or a video service, through multiple service flows, where each service flow represents a supported service. Specifically, the IP packets of different services are classified by the CM according to the IP address (such as the source IP address) and then reach the CMTS through different service flows; and the network has a CMTS, and different virtual locals are allocated to different service flows. A Local Area Network (VLAN) identifier is used for distinguishing.

For non-IP packets, such as Address Resolution Protocol (ARP) packets, the CM cannot match any traffic classifier and match it to the default stream. The default stream is assigned the VLAN ID in the CMTS. It is different from the VLAN ID of the service flow; it will cause a CPE to carry IP packets at the CMTS, and will assign one according to the service flow category to which it belongs. The VLAN ID, not the IP packet, is assigned a VLAN ID corresponding to the default stream. The two VLANs are not the same.

Summary of the invention

The embodiment of the invention provides a packet processing method, device and system, which can improve the line rate and the communication quality while reducing the energy consumption.

In a first aspect, the embodiment of the present invention provides a packet processing method, including: receiving a packet from a user equipment; and when identifying that the received packet is an IP packet, according to a source in the packet header The IP address is used to perform traffic classification on the packet. When the received packet is an ARP packet, the packet is classified according to the IP address of the sender in the payload of the packet. The packets classified by the traffic are sent through the corresponding service flows.

In a first possible implementation manner of the first aspect, the performing traffic classification on the packet according to the source IP address in the packet header includes: matching the packet to the packet header The service flow corresponding to the IP address segment where the source IP address is located.

In a second possible implementation manner of the first aspect, the method further includes: marking packets sent by different service flows with different VLANs; and marking packets sent by using the same service flow with the same VLAN

In a third possible implementation manner of the first aspect, before the packet that performs the traffic classification is sent by using the corresponding service flow, the method further includes: when the packet type cannot be identified, the packet is corresponding to The default stream.

In combination with the first aspect, the first possible implementation of the first aspect, the second possible implementation of the first aspect, or the third possible implementation of the first aspect, in a fourth possible implementation The service flow is a service flow used to transmit a service in a hybrid optical fiber coaxial network.

In a second aspect, an embodiment of the present invention provides a cable modem, including a receiver, a stream classifier, and a transmitter, where

The receiver is configured to receive a message from a user equipment;

The flow classifier is configured to: when the received packet is an IP packet, perform flow classification on the packet according to a source IP address in the packet header; and identify the received packet. When the ARP packet is an ARP packet, the packet is classified according to the IP address of the sender in the payload of the packet.

The sender sends the packet that has been classified by the traffic through the corresponding service flow.

In a first possible implementation manner of the second aspect, the flow classifier is further configured to match the packet to a service flow corresponding to an IP address segment where the source IP address in the packet header is located. .

In a second possible implementation manner of the second aspect, the sender marks the packets sent by using different service flows with different VLANs; and the packets sent by the same service flow are marked with the same VLAN.

In a third possible implementation manner of the second aspect, the traffic classifier, when the packet type cannot be identified, corresponds to the default flow.

In combination with the second aspect, the first possible implementation of the second aspect, the second possible implementation of the second aspect, or the third possible implementation of the second aspect, in a fourth possible implementation manner The service flow is a service flow used to transmit a service in a hybrid optical fiber coaxial network.

In a third aspect, an embodiment of the present invention provides a message processing system, where the system includes the cable modem and a plurality of client devices, and the cable modem is connected to the plurality of client devices.

With the solution described in this embodiment, the specific service packets and ARP packets sent from the same user equipment can be sent through the same service flow, so that services in the hybrid fiber coaxial network can be processed normally.

DRAWINGS

1 is a schematic diagram of an architecture of a hybrid optical fiber coaxial network;

2 is a schematic flowchart of a packet processing method according to an embodiment of the present invention;

3 is a schematic structural diagram of an ARP packet;

4 is a schematic flowchart of a specific packet processing according to an embodiment of the present invention;

FIG. 5 is a schematic flowchart of still another specific packet processing according to an embodiment of the present invention;

6 is a schematic structural diagram of a cable modem according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a general network component according to an embodiment of the present invention.

FIG. 8 is a schematic structural diagram of a message processing system according to an embodiment of the present invention;

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. It is a partial embodiment of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

The embodiment of the invention provides a packet processing method, including

Step 201: Receive a packet from a user equipment.

Step 203: When it is identified that the received packet is an IP packet, the packet is classified according to the source IP address in the packet header; and the received packet is identified as an ARP packet. In the text, the packet is classified according to the sender IP address in the payload of the packet;

Further, the classifying the packet according to the source IP address in the packet header includes: matching the packet to a service corresponding to the IP address segment where the source IP address in the packet header is located. Flow on

Step 205: The packet that has been classified by the traffic is sent through the corresponding service flow.

Specifically, the ARP packet format is as shown in Figure 3. In the ARP packet, the hardware type, protocol class, hardware address length, protocol length, and operation type are in the packet header, and the sender hardware address is sent. The party IP address, the target hardware address, and the destination IP address are in the payload.

Further, the service flow is a service flow used to transmit a service in a hybrid optical fiber coaxial network.

Further, the method further includes, in step 207 (not shown), marking the packets sent by different service flows with different VLANs; using the same VLAN tag for the packets sent by the same service flow Remember.

Further, step 203 further includes: when the message type cannot be identified, the message is corresponding to the default stream.

The following describes the specific scenario. It is assumed that there are two service flows (service-flow), default flows, and video service flows on the CM uplink.

If the example scheme of the present invention is not adopted, as shown in FIG. 4, the CM performs traffic classification according to the prior art using the IP address. A CPE with a source IP address of 1.1.1.2 sends a video service packet to the CM. The CM receives the video service packet and identifies that the video service packet is an IP packet. The source IP address of the source IP address is 1.1.1.2, and the source IP address can be matched to the IP address segment corresponding to the video service flow, and the video service packet is sent through the video service flow; When the ARP packet is sent to the CM, the CM, after receiving the ARP packet, recognizes that the ARP packet is not an IP packet, and does not carry the source IP address, and naturally cannot match the video service stream. ARP packets are sent through the default stream. Because the CMTS identifies different service flows with different VLANs, different packets sent from the same CPE are marked without VLAN identification.

If the embodiment of the present invention is used, as shown in FIG. 5, the CPE whose source IP address is 1.1.1.2 sends a video service packet to the CM; the CM receives the video service packet and determines that the video service packet is The IP packet is classified according to the source IP address 1.1.1.2 carried in the video service packet, and the source IP address can be matched to the IP address segment corresponding to the video service stream, and the video service is obtained. The packet is sent through the video service stream. When the CPE sends the ARP packet to the CM, the CM receives the ARP packet and identifies that the ARP packet is not an IP packet. The sender IP address is used to classify the packet. The sender is the CPE whose source IP address is 1.1.1.2, and the sender IP address is 1.1.1.2, which can match the video service flow. IP In the address segment, the CM sends the ARP packet through the video service stream. In this way, video service packets and ARP packets sent from the same CPE are sent through the video service stream. At the CMTS, the same VLAN is also used to avoid the problems in the prior art.

The embodiment of the present invention further provides a cable modem 600, including a receiver 601, a stream classifier 602, and a transmitter 603, wherein

The receiver 601 is configured to receive a message from a user equipment.

The flow classifier 602 is configured to: when the received packet is an IP packet, perform flow classification on the packet according to a source IP address in the packet header; when the received identifier is identified When the packet is an ARP packet, the packet is classified according to the sender IP address in the payload of the packet.

The transmitter 603 sends the packet subjected to the traffic classification through the corresponding service flow.

The traffic classifier 602 is further configured to match the packet to a service flow corresponding to an IP address segment where the source IP address in the packet header is located.

Further, the sender 603 marks the packets sent by different service flows with different VLANs; the packets sent by the same service flow are marked with the same VLAN.

Further, when the traffic classifier 602 cannot identify the packet type, the traffic classifier 602 corresponds to the default flow.

It should be further noted that the specific actions performed by the various units of the cable modem are the methods in the foregoing method embodiments, and the effects obtained are similar, and specific steps are not described again.

A person skilled in the art can understand that all or part of the steps of implementing the above method embodiments may be completed by using hardware related to the program instructions. The foregoing program may be stored in a computer readable storage medium, and the program is executed when executed. The foregoing steps include the steps of the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk. The network processing described in detail above may be implemented on a general purpose component such as a computer or network component having sufficient processing power, memory resources, and network throughput capabilities. Figure 7 is a schematic representation of an electrical universal network portion suitable for implementing one or more embodiments of the components disclosed herein. Piece 700. The network component 700 includes a processor 702 (which may be referred to as a central processing unit or CPU) that includes a second memory 704, a read only memory (ROM) 706, a random access memory (RAM) 708, input/ The output (I/O) device 710 and the network connectivity device 712 communicate with the memory device. The processor 702 can be implemented as one or more CPU chips or as part of one or more application specific integrated circuits.

The second memory 704 is typically comprised of one or more disk drives or disk drives and is used for non-volatile storage of data and as an overflow data storage device if the RAM 708 is not large enough to accommodate all of the operational data. The second memory 704 can be used to store programs that are loaded into the RAM 708 when selected for execution. ROM 706 is used to store instructions and data that is read during program execution. ROM 706 is a non-volatile memory device that typically has a smaller memory capacity relative to the larger memory capacity of second memory 704. RAM 708 is used to store volatile data and possibly store instructions. Access to ROM 706 and RAM 708 is typically faster than access to second memory 704.

An embodiment of the present invention provides a message processing system, as shown in FIG. 8, including a cable modem 801 shown in FIG. 6, and a plurality of client devices 802; the cable modem 801 and the plurality of client devices. 802 connected.

Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that The technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced; and the modifications or substitutions do not deviate from the technical solutions of the embodiments of the present invention. range.

Claims

A packet processing method, comprising:

Receiving a message from the client device;

When the received packet is an IP packet, the packet is classified according to the source IP address in the packet header; when the received packet is an ARP packet, And classifying the packet according to the sender IP address in the packet payload;

The packets that have been classified by the traffic are sent through the corresponding service flows.
The packet processing method according to claim 1, wherein the classifying the packet according to the source IP address in the packet header comprises: matching the packet to the packet header The service flow corresponding to the IP address segment where the source IP address is located.
The packet processing method according to claim 1, wherein the method further comprises: marking packets sent by different service flows with different VLANs; and marking packets sent by the same service flow with the same VLAN.
The packet processing method according to claim 3, wherein before the packet subjected to the traffic classification is sent through the corresponding service flow, the method further includes: when the packet type cannot be identified, the packet is processed. Corresponds to the default stream.
The packet processing method according to any one of claims 1 to 4, wherein the service flow is a service flow for transmitting a service in a hybrid optical fiber coaxial network.
A cable modem, comprising a receiver 601, a stream classifier 602, and a transmitter 603, wherein

The receiver 601 is configured to receive a message from a user equipment.

The flow classifier 602 is configured to: when the received packet is an IP packet, perform flow classification on the packet according to a source IP address in the packet header; when the received identifier is identified When the packet is an ARP packet, the packet is classified according to the sender IP address in the payload of the packet.

The transmitter 603 sends the packet subjected to the traffic classification through the corresponding service flow.
The cable modem of claim 6 wherein said stream classifier 602 Further, the packet is matched to a service flow corresponding to an IP address segment where the source IP address in the packet header is located.
The cable modem of claim 6 wherein said transmitter 603 marks packets transmitted over different traffic flows with different VLANs; packets transmitted over the same traffic flow are tagged with the same VLAN.
The cable modem of claim 6 wherein said flow classifier 602 maps the message to a default stream when the message type is not identifiable.
A cable modem according to any of claims 6-9, wherein said traffic stream is a traffic stream used to transport traffic in a hybrid fiber coax network.
A message processing system, comprising: the cable modem 801 of any of claims 6-10, and a plurality of client devices 802; the cable modem 801 and the plurality of client devices 802 connected.