WO2016206502A1

WO2016206502A1 - Service control method and apparatus, and computer storage medium

Info

Publication number: WO2016206502A1
Application number: PCT/CN2016/082269
Authority: WO
Inventors: 罗春
Original assignee: 中兴通讯股份有限公司
Priority date: 2015-06-24
Filing date: 2016-05-16
Publication date: 2016-12-29
Also published as: CN106330695B; CN106330695A

Abstract

A service control method and apparatus, and a computer storage medium. The method comprises: receiving a service creation request, and calculating a service path or a service recovery path according to a service attribute and a service state (101); sending a service path creation request to a first node of the service path according to the calculated service path or service recovery path, so that the first node creates a service path or recovers a service path (102) by using a Resource Reservation Protocol (RSVP); and after the service path is successfully created or recovered, updating an actual service path (103) stored.

Description

Service control method and device, computer storage medium

Technical field

The present invention relates to the field of transmission network communication, and in particular, to a service control method and apparatus under a State Path Computation Element (PCE), and a computer storage medium.

Background technique

The control plane technology of the transmission communication network is gradually distributed from the Multi-Protocol Label Switching-Traffic Engineer (MPLS-TE) and the Generalized Multi-Protocol Label Switching (GMPLS). Control, the development of centralized intelligent control technology to Software Defined Network (SDN).

Among the above control methods, key technologies are still concentrated on path calculation and service management. In terms of path computation, PCE is introduced as a separate functional entity, which is specifically used for increasingly complex business path calculations. In terms of service management, the traditional technologies and standards based on MPLS-TE and GMPLS are very mature. The resource reservation protocol (RSVP) is used to establish the Label Switched Path (LSP). The problem of managing LSPs is to manage the services. The problem is that each service is managed by the first node of the transport network, decentralized control, and the problems of global services cannot be optimized and control conflicts. Therefore, the concept of SDN centralized control is gradually proposed. However, at present, SDN is not mature in relevant standards. Especially for optical networks, it is not clear which process is used to establish related services and what kind of cross-representation is used.

With the introduction of the stateful PCE technology, the PCE can obtain services established by all control planes and master the entire LSP. The draft draft-ietf-pce-pce-initiated-lsp proposes to establish an LSP from the PCE, but only triggers the service. Established, for the recovery, protection and multi-layer network business control often used in the transmission network is not involved.

Summary of the invention

To solve the above technical problem, an embodiment of the present invention provides a service control method and apparatus, and a computer storage medium.

The service control method provided by the embodiment of the present invention includes:

Receiving a service establishment request, and calculating a service path or a service recovery path according to the service attribute and the service status;

And sending a service path establishment request to the first node of the service path according to the calculated service path or the service recovery path, so that the first node establishes a service path or restores a service path by using RSVP;

After the service path is established or restored successfully, the actual path of the stored service is updated.

In the embodiment of the present invention, the calculating the service path or the service recovery path according to the service attribute and the service status includes:

When the service status is a service establishment, the service path is directly calculated;

When the service status is a service fault, the service recovery path is calculated according to the recovery attribute and the associated path in the service attribute information;

The request content in the receiving service establishment request includes: first and last access point information, service level information, service flow parameter, signal type, recovery attribute, and protection attribute of the service in the transmission network; the service attribute includes: receiving The request content and associated path in the service establishment request.

In the embodiment of the present invention, the method further includes:

When the fault monitoring point detects the fault, the receiving first node sends information indicating that the service status is a service fault, and updates the service status.

In the embodiment of the present invention, the service path establishment request carries a recovery attribute, where the recovery attribute indicates whether the established service path has a recovery capability;

The method further includes: when sending a service path establishment request to a first node of the service path, further Transmitting the calculated service path and preset path to the first node of the service path.

In the embodiment of the present invention, the method further includes:

When there is a preset path, the service is restored by using the preset path after the service fails; when there is no preset path, the service information is re-calculated after the fault information is reported, and the service path establishment request is re-initiated, wherein the original path is used as the original path. The associated path is avoided during path calculation.

In the embodiment of the present invention, the service path establishment request carries a protection attribute, where the protection attribute indicates whether the established service path is a working state or a protection state, and a protection mode when the state is protected;

Sending the service path establishment request to the first node of the service path, including:

Transmitting the calculated plurality of service paths and protection attributes to the first node of the service path.

In the embodiment of the present invention, the service path establishment request carries an extended link attribute, where the extended link attribute indicates that the established service path forms a link;

Transmitting the extended link attribute to the head node of the service path.

The service control apparatus provided by the embodiment of the present invention includes:

The service control module is configured to receive a service establishment request by using the first interface, and send a path calculation request to the path calculation module according to the service attribute and the service state;

a path calculation module configured to calculate a service path or a service recovery path;

The service control module is further configured to send the calculated service path or the service recovery path to the first node of the service path by using the second interface, and send a service path establishment request to the first node, so that the first node establishes a service through RSVP. Path or recovery business path;

The path management module is configured to update the stored actual path of the service after the service path is successfully established or restored.

In the embodiment of the present invention, the device further includes: a service state management module configured to be stored Business status of the business path;

The path calculation module is further configured to: when the service status is a service establishment, directly calculate a service path; when the service status is a service failure, calculate a service recovery path according to the recovery attribute and the associated path in the service attribute information;

In the embodiment of the present invention, the service state management module is further configured to: when the fault monitoring point detects the fault, receive the first node to send information indicating that the service state is a service fault, and update the service state.

The service control module is further configured to send the recovery attribute to a first node of the service path.

In the embodiment of the present invention, the service control module is further configured to: when there is a preset path, use a preset path to recover the service after the service fails; when there is no preset path, report the fault information and then make the path calculation module Recalculate the service path and re-initiate the service path establishment request, wherein the original path is avoided as the associated path in the path calculation.

The service control module is further configured to send the calculated multiple service paths and protection attributes to the first node of the service path.

The service control module is further configured to send the extended link attribute to a first node of the service path.

The computer storage medium provided by the embodiment of the present invention stores a computer program for executing the foregoing service control method.

In the technical solution of the embodiment of the present invention, the service control device is introduced in the stateful PCE, and the device implements the receiving service establishment request, and calculates the service path or the service recovery path according to the service attribute and the service state; the service path or service according to the calculation The recovery path sends a service path establishment request to the first node of the service path, so that the first node establishes a service path or restores a service path through RSVP. After the service path is successfully established or restored, the actual path of the stored service is updated. The device realizes centralized control service on the stateful PCE, triggers the transmission node to establish related services according to MPLS-TE or GMPLS, and realizes intelligent control based on the mature service establishment mode of MPLS-TE and GMPLS. Centralized, enabling recovery, protection, and business control of multi-tier networks.

DRAWINGS

FIG. 1 is a schematic flowchart of a service control method according to an embodiment of the present invention;

2 is a schematic structural diagram of a service control apparatus according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of establishing a service of a two-layer transmission network according to an embodiment of the present invention.

detailed description

The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

1 is a schematic flowchart of a service control method according to an embodiment of the present invention. The service control method in this example is applied to a service control apparatus. As shown in FIG. 1, the service control method includes Next steps:

Step 101: Receive a service establishment request, and calculate a service path or a service recovery path according to the service attribute and the service state.

In the embodiment of the present invention, the content of the request in the receiving service establishment request includes, but is not limited to, the first and last access point information, the service level information, the service flow parameter, the signal type, the recovery attribute, and the protection attribute of the service in the transmission network.

Here, there are multiple ways to receive a service establishment request: the user may send a service establishment request to the service control device through the network management system, or may be forwarded to the service control device after receiving the service establishment request by the transmission node, or the service may be established by the SDN application. Please send it to the service control device, or other network related entity to send a service establishment request to the service control device.

In the embodiment of the present invention, the service attribute includes: receiving the requested content and the associated path in the service establishment request.

In the embodiment of the present invention, the service state includes an established state, a fault state, and the like.

In the embodiment of the present invention, when the service status is a service establishment, the service path is directly calculated;

Step 102: Send a service path establishment request to the first node of the service path according to the calculated service path or the service recovery path, so that the first node establishes a service path or restores a service path through the resource reservation protocol RSVP.

In the embodiment of the present invention, the service path establishment request is specifically triggered by the LSP establishment message, and the message is sent by a Path Computation Element Protocol (PCEP).

In the embodiment of the present invention, one or more of the following attributes are extended in the service path establishment request: a recovery attribute, a protection attribute, and an extended link attribute. When the service path involves multiple layers, the service control device needs to split the service path according to different levels, and trigger the establishment of the relevant service path at each level. The triggering sequence is to trigger the establishment of the service layer LSP and then trigger the client layer LSP. of set up.

In the first implementation manner, the service path establishment request carries a recovery attribute, where the recovery attribute indicates whether the established service path has a recovery capability, and the method further includes: sending a service path establishment request to the first node of the service path. The calculated service path and the preset path are also sent to the first node of the service path.

Here, when there is a preset path, the service is restored by using the preset path after the service fails; when there is no preset path, the service information is re-calculated after the fault information is reported, and the service path establishment request is re-initiated, wherein the original The path is avoided as an associated path when calculating the path.

In the second implementation manner, the service path establishment request carries a protection attribute, where the protection attribute indicates whether the established service path is a working state or a protection state, and a protection mode when the state is protected; The sending, by the first node, the service path establishment request includes: sending the calculated multiple service paths and protection attributes to the first node of the service path.

In the third implementation manner, the service path establishment request carries an extended link attribute, where the extended link attribute indicates that the established service path forms a link, and the first node that sends the service path establishes a service path establishment request, The method includes: transmitting the extended link attribute to a first node of the service path.

Step 103: After the service path is established or restored successfully, the stored actual path of the service is updated.

In the embodiment of the present invention, after the service path is successfully established or restored, the first node reports to the service control device that the service path is established or restored successfully, and the service control device receives the message and updates the stored actual path of the service.

In the embodiment of the present invention, the service path is in the maintenance state after the establishment of the service path. When the fault detection point detects the fault, the first node of the service path is notified by using the RSVP protocol, and the first node of the service path is notified to the service control device to update the related service. status. That is, when the fault monitoring point detects the fault, the receiving first node sends information indicating that the service state is a service fault, and updates the service state. Then, the service control device determines whether to resume or return according to the service status. Repeat the operation and re-establish the establishment or recovery of the service path.

2 is a schematic structural diagram of a service control apparatus according to an embodiment of the present invention. As shown in FIG. 2, the apparatus includes:

The service control module 21 is configured to receive a service establishment request by using the first interface 41, and send a path calculation request to the path calculation module according to the service attribute and the service status;

The path calculation module 22 is configured to calculate a service path or a service recovery path.

The service control module 21 is further configured to send the calculated service path or the service recovery path to the first node of the service path through the second interface 42 and send a service path establishment request to the first node, so that the first node passes the RSVP. Establish a business path or restore a business path;

The path management module 23 is configured to update the stored actual path of the service after the service path is successfully established or restored.

In the embodiment of the present invention, the device further includes: a service state management module 24, configured to store a service state of the service path;

The path calculation module 22 is further configured to directly calculate a service path when the service status is a service establishment; and when the service status is a service failure, calculate a service recovery path according to the recovery attribute and the associated path in the service attribute information. ;

In the embodiment of the present invention, the service state management module 24 is further configured to: when the fault monitoring point detects a fault, receive the first node to send information indicating that the service state is a service fault, and update the service state.

The service control module 21 is further configured to send the recovery attribute to a first node of the service path.

In the embodiment of the present invention, the service control module 21 is further configured to: when there is a preset path, use the preset path to recover the service after the service fails; when there is no preset path, report the path after the fault information is reported. The module 22 recalculates the service path and re-initiates the service path establishment request, wherein the original path is avoided as the associated path in the path calculation.

The service control module 21 is further configured to send the calculated multiple service paths and protection attributes to the first node of the service path.

The service control module 21 is further configured to send the extended link attribute to a first node of the service path.

It should be understood by those skilled in the art that the implementation functions of the units in the service control apparatus shown in FIG. 2 can be understood by referring to the related description of the foregoing service control method. The functions of the units in the service control device shown in FIG. 2 can be implemented by a program running on a processor, or can be realized by a specific logic circuit.

In practical applications, the functions implemented by each unit in the service control device may be implemented by a central processing unit (CPU) located in the service control device, or Microprocessor Unit (MPU), or Digital Signal Processor (DSP), or Field Programmable Gate Array (FPGA).

The apparatus for tracking the service signaling according to the embodiment of the present invention may also be stored in a computer readable storage medium if it is implemented in the form of a software function module and sold or used as a separate product. Based on such understanding, the technical solution of the embodiments of the present invention may be embodied in the form of a software product in essence or in the form of a software product stored in a storage medium, including a plurality of instructions. A computer device (which may be a personal computer, server, or network device, etc.) is caused to perform all or part of the methods described in various embodiments of the present invention. The foregoing storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read only memory (ROM), a magnetic disk, or an optical disk. Thus, embodiments of the invention are not limited to any specific combination of hardware and software.

Correspondingly, the embodiment of the present invention further provides a computer storage medium, wherein a computer program is stored, and the computer program is used to execute the service control method of the embodiment of the present invention.

The service control method of the embodiment of the present invention is further elaborated in the following with reference to specific scenarios.

scene one

If the required service needs to be restored, the service will be restored through the new path establishment after monitoring the service failure. The recovery attribute is extended in the triggering LSP establishment message. When the service is established, the service control device notifies the first node of the service path by triggering the LSP establishment message. The recovery attribute indicates whether the established LSP has the resiliency. If the recovery path is specified in the preset mode, the recovery path can also be included in the recovery attribute. The preset recovery path can be set to meet multiple recovery.

After the fault occurs, the LSP is established by the RSVP. The fault is learned by the first node of the LSP. If the LSP has the resiliency, the recovery process is started. Otherwise, the LSP fault notification service control is reported. Device.

If the LSP has a preset recovery path, the LSP head node directly uses the preset recovery path to establish a new LSP. After the establishment is successful, the LSP is reported to the path corresponding to the new LSP of the service control device, and the service control module associates the LSP with the service. And updating the corresponding path of the new LSP to the service path management module; if there is no preset recovery path, the LSP first node reports the service control device to notify the service fault, and the service control device confirms that the service has the resilience capability and initiates a new The path calculation, after the new service path is obtained, triggers the establishment of a new LSP service path to the first node. After the establishment is successful, the first node reports the service control module, and the service control module associates the LSP with the service and associates the new LSP. The path is updated to the path management module.

Scene two

The service to be established needs to be protected. When the service is established, multiple LSP paths are calculated based on the protection information. The protection attribute is extended in the LSP establishment message. When the service is established, the service control device establishes a message by triggering the LSP. Each LSP and its corresponding protection attribute are notified to the first node of the service path. The protection attribute indicates whether the LSP is a working LSP or a protection, and a protection mode. The protection mode refers to 1+1, 1:1, m:n, and the like.

After the service is faulty, the transmission device quickly switches according to the protection configuration, and the service first node needs to determine the LSP where the service traffic is located, and notifies the stateful PCE to update the path management module.

Scene three

When the service needs to be established across multiple levels of the service, when the service is established, the path calculated by the path calculation module indicates the path of each level, and the service is established at each level. After the service layer service is successfully established, The TE link is formed for service layer service. The LSP setup message is sent to the first node of the service layer LSP. The link attribute is extended in the trigger LSP setup message to indicate that the link needs to be formed after the LSP is established. After the establishment is successful, the service control device is reported, and the link information formed by the LSP of the service control device is notified, and the LSP establishment message is sent to the client layer to establish related services.

3, is a two-layer network, links 22a, 22b, 22c are service layer links, and links 11a, 11b are client layer links. The service control device receives the service establishment request, establishes a transmission service from the node 1 to the node 4, and after calculation, determines that the service path arrives from the node 1 through the links 11a, 22a, 22b, 22c, 11b to the node 4, wherein the service layer path is Links 22a, 22b, 22c. The service control device first sends a trigger LSP setup message (1) to the node 2, where the service layer path and the link attribute are carried. The link attribute indicates that the service layer service is successfully established to form a client layer link, and the node 2 initiates establishment by using the RSVP protocol. The service layer service is finally successfully established through the RSVP protocol interaction and abstracts the link 11c. After the service layer service is successfully established, the node 2 notifies the service layer control device (11) of the abstracted client layer link 11c and the service layer service establishment success information by the report message (2), and the service control device determines that the client layer service path is the link 11a, 11c. 11b is sent to the node 1 by triggering the LSP establishment message (3), and the node 1 initiates the establishment of the client layer service by using the RSVP protocol, which carries the client layer path, and is finally successfully established through the RSVP protocol interaction, and notifies the service by reporting the message (4). The control device business was successfully established.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Industrial applicability

The technical solution of the embodiment of the present invention introduces a service control device in a stateful PCE, and implements a centralized control service on the stateful PCE by using the device, and triggers the transmission node to establish related services according to the MPLS-TE or GMPLS manner, and utilizes Based on the mature service establishment mode of MPLS-TE and GMPLS, the centralized control of intelligent control is realized, and the recovery, protection and service control of the multi-layer network are realized.

Claims

A service control method, the method comprising:

Receiving a service establishment request, and calculating a service path or a service recovery path according to the service attribute and the service status;

And sending a service path establishment request to the first node of the service path according to the calculated service path or the service recovery path, so that the first node establishes a service path or restores a service path by using a resource reservation protocol RSVP;

After the service path is established or restored successfully, the actual path of the stored service is updated.
The service control method according to claim 1, wherein the calculating the service path or the service recovery path according to the service attribute and the service status comprises:

When the service status is a service establishment, the service path is directly calculated;

When the service status is a service fault, the service recovery path is calculated according to the recovery attribute and the associated path in the service attribute information;

The request content in the receiving service establishment request includes: first and last access point information, service level information, service flow parameter, signal type, recovery attribute, and protection attribute of the service in the transmission network; the service attribute includes: receiving The request content and associated path in the service establishment request.
The service control method according to claim 2, wherein the method further comprises:

When the fault monitoring point detects the fault, the receiving first node sends information indicating that the service status is a service fault, and updates the service status.
The service control method according to claim 2, wherein the service path establishment request carries a recovery attribute, and the recovery attribute indicates whether the established service path has a recovery capability;

The method further includes: when the service path establishment request is sent to the first node of the service path, the calculated service path and the preset path are also sent to the first node of the service path.
The service control method according to claim 4, wherein the method further comprises:

When there is a preset path, the service is restored using the preset path after the service fails;

When there is no preset path, the service path is re-calculated after the fault information is reported, and the service path establishment request is re-initiated. The original path is used as the associated path to avoid the path calculation.
The service control method according to claim 2, wherein the service path establishment request carries a protection attribute, the protection attribute indicating whether the established service path is a working state or a protection state, and a protection mode when the state is protected;

Sending the service path establishment request to the first node of the service path, including:

Transmitting the calculated plurality of service paths and protection attributes to the first node of the service path.
The service control method according to claim 2, wherein the service path establishment request carries an extended link attribute, and the extended link attribute indicates that the established service path forms a link;

Sending the service path establishment request to the first node of the service path, including:

Transmitting the extended link attribute to the head node of the service path.
A service control device, the device comprising:

The service control module is configured to receive a service establishment request by using the first interface, and send a path calculation request to the path calculation module according to the service attribute and the service state;

a path calculation module configured to calculate a service path or a service recovery path;

The service control module is further configured to send the calculated service path or the service recovery path to the first node of the service path by using the second interface, and send a service path establishment request to the first node, so that the first node establishes a service through RSVP. Path or recovery business path;

The path management module is configured to update the stored actual path of the service after the service path is successfully established or restored.
The service control device according to claim 8, wherein said device further comprises: a service state management module configured to store a service state of the service path;

The path calculation module is further configured to: when the service status is a service establishment, directly calculate a service path; when the service status is a service failure, calculate a service recovery path according to the recovery attribute and the associated path in the service attribute information;

The request content in the receiving service establishment request includes: first and last access point information, service level information, service flow parameter, signal type, recovery attribute, and protection attribute of the service in the transmission network; the service attribute includes: receiving The request content and associated path in the service establishment request.
The service control device according to claim 9, wherein the service state management module is further configured to: when the fault monitoring point detects a fault, receive the first node to send information indicating that the service state is a service fault, and The status is updated.
The service control apparatus according to claim 10, wherein the service path establishment request carries a recovery attribute, and the recovery attribute indicates whether the established service path has a recovery capability;

The service control module is further configured to send the recovery attribute to a first node of the service path.
The service control device according to claim 11, wherein the service control module is further configured to: when there is a preset path, use a preset path to recover the service after the service fails; and when there is no preset path, report the service After the fault information, the path calculation module recalculates the service path and re-initiates the service path establishment request, wherein the original path is avoided as the associated path in the path calculation.
The service control apparatus according to claim 10, wherein the service path establishment request carries a protection attribute, the protection attribute indicating whether the established service path is a working state or a protection state, and a protection mode when the state is protected;

The service control module is further configured to calculate a plurality of service paths and protection attributes The first node sent to the service path.
The service control apparatus according to claim 10, wherein the service path establishment request carries an extended link attribute, and the extended link attribute indicates that the established service path forms a link;

The service control module is further configured to send the extended link attribute to a first node of the service path.
A computer storage medium having stored therein computer executable instructions configured to perform the service control method of any of claims 1-7.