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A data transmission method and device

A data transmission method and data frame technology, applied in the field of network communication, can solve the problems affecting the efficiency of network transmission and bandwidth utilization, increase processing complexity, and service forwarding delay, so as to speed up processing and forwarding speed, reduce overhead, The effect of reducing workload

Inactive Publication Date: 2008-07-02
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] It can be seen from the above description of prior art 2 that when this method is adopted, GFP or length indication encapsulation must be performed on each subframe on the ingress edge node of the transmission network; while the network transport layer needs to be removed on the egress edge node After encapsulation, each subframe in the multiframe is further framed and decapsulated, which increases the complexity of processing and inevitably leads to service forwarding delays
On the other hand, since length encapsulation or GFP encapsulation must be performed on each subframe, overhead will be increased, affecting network transmission efficiency and bandwidth utilization

Method used

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  • A data transmission method and device
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  • A data transmission method and device

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Experimental program
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Embodiment 1

[0032] The data transmission method disclosed in this embodiment includes the following steps:

[0033] S101. When a subframe enters the network from a network ingress edge node, first classify the subframe according to the forwarding path of the subframe;

[0034] Wherein, the subframe includes one or a combination of different types such as an Ethernet frame or an MPLS (Multi-protocol Label Switching) frame. Therefore, the forwarding path can be searched according to the destination MAC address and / or VLAN label in the Ethernet message, or the label in the MPLS message. This method is also applicable to subframes of other data packets, and correspondingly can use feature information in other data packets to search, such as PW (pseudowire) labels and the like. Not to list them all here.

[0035] S102, filling the subframe with the same forwarding path in the payload area of ​​the IPv6 frame, and identifying the relevant information of the subframe in the extended header of ...

Embodiment 2

[0052] Compared with Embodiment 1, the difference in its processing steps in this embodiment is: filling subframes with the same forwarding path into the payload area of ​​a GFP (General Framing Procedure, general framing procedure) frame to form a GFP multiframe, and then map the GFP multiframe as a payload to the network transport layer for transmission.

[0053] Please see image 3 , image 3 It is a schematic diagram of a frame format of a GFP multiframe encapsulating subframes in Embodiment 2 of the present invention. Such as image 3 As shown, the GFP multiframe includes a GFP core header and a GFP payload area. Among them, the GFP core header has a total of 4 bytes, including a 16-bit payload length indicator field and a 16-bit core header error detection field; the GFP payload area has two parts: the payload header and the payload information field, and there is another Selected domain payload FCS. The GFP payload header has two mandatory fields: the type field an...

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Abstract

The invention provides a method and a device for data transmission. The method mainly comprises the following processes: A1. when a data frame arrives an ingress edge node of the transmission network, the subframe is classified according to a forwarding path of the data frame; B1. a plurality of frames having an identical forwarding path are taken as subframes and are assembled into complex frames; an offset of the subframes in the complex frame is marked on the heads of the complex frame; C1. the complex frames are taken as a payload, and encapsulation of the transmission network is added and then is sent out. By adopting the invention, the workload of the processing the data frame by a forwarding device is reduced, and the speed of the process and forwarding is accelerated, at the same time, the expenditure is reduced and the transmission efficiency of the network is increased.

Description

technical field [0001] The invention relates to the field of network communication, in particular to a data transmission method and device. Background technique [0002] As the line speed of the communication network increases and the data flow increases, the burden on the devices in the network increases accordingly. At the same time, although the overall data traffic will become larger and larger, the data packet particles will become smaller and smaller, which further increases the burden on the switching device. On the other hand, the use of traditional data transmission methods to transmit data with very small granularity not only increases the overhead ratio of data transmission and reduces the utilization efficiency of network bandwidth, but also increases the processing times of equipment and increases the burden on equipment. For example: in the current Internet network, in the process of transmitting non-IP service frames, the traditional method is to separately e...

Claims

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Application Information

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IPC IPC(8): H04L12/56
CPCH04L12/4633H04L45/00H04W80/04H04L69/16H04L69/167
Inventor 刘国满
Owner HUAWEI TECH CO LTD
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