Packet transport network (PTN) protection method and device

A technology of packet transmission network and protection device, applied in the field of communication, can solve problems such as technical solutions for protection of UNI side and PE nodes without PTN network, and achieve the effect of improving network security and stability

Inactive Publication Date: 2012-05-23
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the inventor found that: in the prior art, there is no tec

Method used

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  • Packet transport network (PTN) protection method and device
  • Packet transport network (PTN) protection method and device
  • Packet transport network (PTN) protection method and device

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0022] Example 1

[0023] figure 1 It is a preferred flowchart of a method for protecting a packet transport network according to an embodiment of the present invention, which includes the following steps:

[0024] S102: Detect whether the main PW fails through the operation management and maintenance OAM information of the main pseudowire PW currently carrying the service;

[0025] S104: If a failure occurs, switch the service from the primary PW to the backup PW.

[0026] In this preferred embodiment, TMC (T-MPLS Channel) channel layer protection (PW protection) is used to implement dual-homing to the PTN network. PW protection refers to providing a backup PW for a particular PW. When the PW occurs In the event of a failure, the service can be quickly switched to the standby PW. By switching the service on the failed primary pseudo wire (Pseudo Wire, PW) to the backup pseudo wire, the problem that the UNI side and the PE node of the PTN network cannot be protected in the prior art ...

Example Embodiment

[0034] Example 2

[0035] figure 2 It is a schematic diagram of a dual-homing network with PTN with linear protection according to an embodiment of the present invention. Dual-homing (Dual Homing) is a network topology in which a device uses an independent access point (attachment point). ) Is connected to the network. In addition, one access point is the main connection and the other is the backup connection, which is activated in the case of the main connection failure.

[0036] in figure 2 Among them, path 1 is the main PW channel, path 2 is the backup PW channel, and path 3 is the protection path of the main PW. Different PWs can be used to carry services in different situations. For example, you can refer to the following table to select PWs that carry services:

[0037] Table 1 PWs carrying services in different states of active and standby PWs

[0038]

[0039] In this preferred embodiment, a linear protection method is adopted. Specifically, the PTN-based service protectio...

Example Embodiment

[0046] Example 3

[0047] image 3 It is a schematic diagram of dual-homing networking of PTN without linear protection according to an embodiment of the present invention. image 3 Among them, path 1 is the main PW channel, and path 2 is the backup PW channel.

[0048] In this preferred embodiment, a non-linear protection method is adopted. Specifically, the PTN-based service protection method in various situations includes the following steps:

[0049] S1: Establish a two-way PW connection channel between PE node A and PE node D (passing P node B), and take path 1; establish a backup two-way PW connection channel between PE node A and PE node E (passing P node C), take path 2;

[0050] S2: When path 1, path 2, UNI 1, and UNI 2 are all normal, the service takes path 1 inside the PTN;

[0051] S3: When UNI 1 or PE node D fails, or path 1 fails, the primary PW is in SF, and the service is poured onto the backup PW, using paths 2 and UNI 2;

[0052] S4: When UNI 2 fails, PE node E fails,...

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Abstract

The invention discloses a packet transport network (PTN) protection method and device. The PTN protection method comprises the following steps: detecting that whether a main pseudo-line has a fault or not through the operation management and the maintenance information of the main pseudo-line which bears a service currently, and switching the service to a standby pseudo-line from the main pseudo-line if the main pseudo-line has a fault. According to the PTN protection method and device, the problem that the UNI (user network interface) side and the PE (provide edge) node of the PTN can not be protected in the prior art is solved, thus the service of the PTN is protected, and the safety and the stability of the PTN are improved.

Description

technical field [0001] The present invention relates to the field of communications, in particular to a method and device for protecting a packet transport network (Packet Transport Network, PTN). Background technique [0002] With the wide application of PTN networks, the reliability requirements for customer services are getting higher and higher, and major operators are paying more and more attention to protection requirements. At present, the protections that are widely used in PTN networks are mainly the 1+1 and 1:1 linear protection of the TMP (T-MPLS Path) path layer, and the ring network protection (wrapping and steering) of the TMS (T-MPLS Section) layer. Protect). These protections are mainly for the protection of the NNI (Network Node Interface, network node interface) side in the PTN network, without the protection of the UNI (User Network Interface, user network interface) side and PE (Provider Edge, operator edge equipment) Node protection. As operators have...

Claims

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Application Information

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IPC IPC(8): H04L12/24
CPCH04L45/28H04L41/0663
Inventor 林柏松
Owner ZTE CORP
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