WO2015010324A1

WO2015010324A1 - Method and device for reserving relay resource

Info

Publication number: WO2015010324A1
Application number: PCT/CN2013/080190
Authority: WO
Inventors: 隋志成
Original assignee: 华为技术有限公司
Priority date: 2013-07-26
Filing date: 2013-07-26
Publication date: 2015-01-29
Also published as: CN104521190A; CN104521190B

Abstract

Disclosed are a method and device for reserving a relay resource, which relate to the field of communications. The method comprises the steps of: a fault analyzer sending a fault event to a resource reserver; after receiving the fault event, the resource reserver sending a fault object request to a path computation element; after receiving the fault object request, the path computation element computing, according to whole-network network state information for the current network as self-collected in real time, a wavelength resource, a relay resource and a path made usable by the addition of said relay resource of said current network, and sending the computation result to the resource reserver; and the resource reserver obtaining the relay resource to be reserved for the current network according to the received computation result. The method and device eliminate the uncertainties of relay resource use in dynamic rerouting, thereby improving the efficiency of reserving relay resources in rerouting situations.

Description

Method and device for reserving relay resources

Technical field

The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for reserving a relay resource.

Background technique

ASON (Auto Switched Optical Network, Wavelength Automatic Switching Optical Network) has strong anti-failure recovery capabilities. When users deploy ASON, they use dynamic rerouting to flexibly defend against network faults. Especially in the optical layer ASON, after a fault occurs, the dynamic rerouting method enables the service to complete detection, location, rerouting, and recovery in the shortest time. Therefore, for ASON, the reservation of relay resources is very important. If the reservation of the relay resource is not appropriate, the service will be preempted or the recovery will fail due to the inconsistent status of the relay resource. The user needs to reserve the relay resources of the entire network as much as possible to ensure that the service can be successfully restored in the ASON dynamic re-routing mode. In order to ensure the success of the calculation route, the current network usually adopts a dynamic re-routing algorithm based on damage. However, the damage-based dynamic rerouting algorithm is very complex. Therefore, it is very difficult to reserve relay resources according to the damage-based dynamic rerouting algorithm of the prior art.

In the prior art, there is no method for reserving reserved and reserved resource resources in the case of rerouting. In particular, in ASON/GMPLS (Generalized MPLS, general multi-protocol label switching) Network mechanism, can only add relay resources in the order of business failure and simulate it multiple times. For each service, the traffic calculation route and/or the optical parameter calculation route are performed according to the prior art damage-based dynamic re-routing algorithm, and the relay resource is added according to the principle of selecting the relay resource on the first path that is not feasible. The change of the relay resources of the subsequent services will result in the previous services failing to select the added relay resources according to the original intention, which inevitably leads to the preemption of the relay resources between different services. For the user, after simulating once and adding the corresponding relay resources, the simulation will still fail again and it is recommended to add the relay resources again, and then it may still fail when simulated again.

The prior art method and apparatus for reserving relay resources in the case of rerouting have the following disadvantages: The final reservation result is completely randomized. The actual network state is completely inconsistent with the simulated state. It is unpredictable. It is often recommended to add trunk resources. When the simulation still needs to increase the relay resources, the reserved relay resources are inefficient.

Summary of the invention

The embodiment of the invention provides a method and a device for reserving a relay resource, so as to solve the problem that the reserved resource resource is inefficient in the case of rerouting in the prior art.

In order to solve the above technical problem, the embodiment of the present invention discloses the following technical solutions:

In a first aspect, a method for reserving a relay resource is provided, the method comprising the steps of:

The fault analyzer sends the fault event to the resource reserver;

Receiving, by the resource reservation, a fault object request to the path calculation unit after receiving the fault event;

After receiving the fault object request, the path calculation unit calculates a wavelength resource of the current network, a relay resource, and a path that can be accessed by adding a relay resource according to the network state information of the current network collected by the real-time network, and the calculation result is obtained. Sent to the resource reserver;

The resource reservation device obtains a relay resource that needs to be reserved by the current network according to the received calculation result.

In a first possible implementation manner of the first aspect, the method further includes the following steps:

The resource reservation device sends the relay resource that needs to be reserved in the current network to the fault analyzer;

The fault analyzer performs simulation verification on the relay resources that need to be reserved in the current network, and sends the simulation verification result to the resource reservation device;

The resource reserver performs a reservation on the relay resource that is passed through the simulation verification result.

With reference to the first aspect or the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the resource reservation device obtains a current network requirement according to the received calculation result The reserved relay resources include:

The resource reservation device selects an option in an original option group of each service of each fault scenario of the current network, and constitutes a first layer primary option group of each service of each fault scenario of the current network, according to the first The first layer of the primary option group obtains the first layer of quasi-reserved resources of the current network;

Determining, by the resource reservation, a mandatory site for each service of each fault scenario of the current network according to the first layer primary option group of each service of each fault scenario of the current network, according to the required site and the current network The relay resource reservation determines the optional site of the current network;

The resource reserver disables the optional site of the current network one by one, and determines the second layer of the reserved resources of the current network;

Determining whether the number of the relay resources used by the second layer of the quasi-reserved resources is greater than the number of the relay resources used by the first layer of quasi-reserved resources, and if so, using the first layer of quasi-reserved resources as The current network needs to reserve reserved relay resources.

In conjunction with the second possible implementation of the first aspect, in a third possible implementation manner of the first aspect, the resource reservation is in an original option group of each service of each fault scenario of the current network. Selecting an option to form a first layer primary option group of each service of each fault scenario of the current network, and obtaining a first layer of quasi-reserved resources of the current network according to the first layer primary option group, specifically including:

The resource reserver selects an option that occupies the least number of sites in the original option group of each service of each fault scenario of the current network, and constitutes a first layer primary option group of each service of each fault scenario of the current network. ;

The resource reserver selects one option in the first layer primary option group of each service of each fault scenario of the current network to form a first layer advanced option group of the current network; according to the first layer of the current network The option group determines the first layer of quasi-reserved resources of the current network.

In conjunction with the second possible implementation manner of the first aspect, or the third possible implementation manner, in a fourth possible implementation manner of the first aspect, the resource reservation device disables the optional site of the current network one by one. Determine the second layer of quasi-reserved resources of the current network, including:

The resource reservation device disables the optional site of the current network one by one, obtains the sub-layer quasi-reserved resource, and uses the sub-layer quasi-reserved resource with the least number of relay resources as the second-level quasi-reserved resource of the current network. .

With reference to the fourth possible implementation manner of the first aspect, in a fifth possible implementation manner of the first aspect, the resource reservation device obtains a relay that needs to be reserved by the current network according to the received calculation result Resources also include:

If the number of relay resources used by the second layer of quasi-reserved resources is smaller than the number of relay resources used by the first layer of quasi-reserved resources, the resource reserves are disabled one by one except the first optional site. The other optional site determines a third layer of quasi-reserved resources of the current network; the first optional site is an optional site that is disabled by using the sub-layer quasi-reserved resources with the least number of relay resources;

The execution determining step determines the relay resources that the current network needs to reserve.

With reference to the fifth possible implementation manner of the first aspect, in a sixth possible implementation manner of the foregoing aspect, the performing the determining step, specifically, determining: determining, by using the relay of the third layer quasi-reserved resource usage Whether the number of resources is greater than the number of relay resources used by the second layer of quasi-reserved resources, and if so, the second layer of quasi-reserved resources is used as a relay resource that needs to be reserved by the current network.

With reference to the first aspect, any one of the first to sixth possible implementation manners of the first aspect, in the seventh possible implementation manner of the first aspect, the fault analyzer sends a fault event to the resource Before the retainer also includes:

The fault analyzer receives trigger conditions for user requests or user online settings.

With reference to the first aspect, any one of the first to seventh possible implementation manners of the first aspect, in the eighth possible implementation manner of the first aspect, the fault event includes: a site fault event, a chain Road failure event or shared risk link group failure event.

With reference to the first aspect, the first to the eighth possible implementation manner of the first aspect, in the ninth possible implementation manner of the first aspect, the network-wide network state information includes: wavelength occupation Information and relay resource occupancy information.

A second aspect provides an apparatus for reserving a relay resource, where the apparatus includes: a fault analyzer, a resource reserver, and a path calculation unit;

The fault analyzer is configured to send a fault event to the resource reserver;

The resource reserver is configured to send a fault object request to the path calculation unit after receiving the fault event;

The path calculation unit is configured to calculate a wavelength resource, a relay resource, and a path that can be accessed by adding a relay resource according to the network state information of the current network collected by the real-time network, after receiving the fault object request, and Sending a calculation result to the resource reserver;

The resource reservation is further configured to obtain, according to the received calculation result, a relay resource that needs to be reserved by the current network.

In a first possible implementation manner of the second aspect, the resource reservation is further configured to send, to the fault analyzer, a relay resource that needs to be reserved by the current network;

The fault analyzer is configured to perform simulation verification on a relay resource that needs to be reserved in the current network, and send a simulation verification result to the resource reservation device;

The resource reserver is further configured to perform a reservation on the relay resource that is passed through the simulation verification result.

With reference to the second aspect or the first possible implementation manner of the second aspect, in a second possible implementation manner of the second aspect, the resource reserve includes:

a first reserved unit, configured to select an option in an original option group of each service of each fault scenario of the current network, and constitute a first layer primary option group of each service of each fault scenario of the current network, according to the The first layer primary option group obtains the first layer of quasi-reserved resources of the current network;

An optional site unit, configured to determine, according to the first layer primary option group of each service of each fault scenario of the current network, a required site for each service of each fault scenario of the current network, according to the required site and current The relay resource reservation of the network determines an optional site of the current network;

a second reserved unit, configured to disable an optional site of the current network one by one, and determine a second layer of quasi-reserved resources of the current network;

a first determining unit, configured to determine whether the number of relay resources used by the second layer of quasi-reserved resources is greater than the number of relay resources used by the first layer of quasi-reserved resources, and if so, A layer of quasi-reserved resources is used as a relay resource reserved by the current network.

With reference to the second possible implementation of the second aspect, in a third possible implementation manner of the second aspect, the first reserved unit includes:

The first primary module is configured to select an option that occupies the least number of sites in the original option group of each service of each fault scenario of the current network, and constitutes a first layer primary option of each service of each fault scenario of the current network. group;

a first reservation module, configured to select one of the first layer primary option groups of each service in each fault scenario of the current network to form a first layer advanced option group of the current network; according to the first of the current network The layer advanced option group determines the first layer of quasi-reserved resources of the current network.

With reference to the second possible implementation manner of the second aspect, or the third possible implementation manner, in the fourth possible implementation manner of the second aspect, the second reserved unit is specifically configured to disable the current network one by one. The optional site obtains the sub-layer quasi-reserved resources, and uses the sub-layer quasi-reserved resources with the least number of relay resources as the second-level quasi-reserved resources of the current network.

In conjunction with the fourth possible implementation of the second aspect, in a fifth possible implementation of the second aspect, the resource reserve further includes:

a third reserved unit, configured to: if the number of the relay resources used by the second layer of the quasi-reserved resources is smaller than the quantity of the relay resources used by the first layer of the quasi-reserved resources, the resource reserves are one by one Deactivating a third-layer quasi-reserved resource of the current network, and selecting the third-layer quasi-reserved resource of the current network, where the first optional site is the sub-layer quasi-reserved resource corresponding to the least number of the relay resources Disabled optional site;

The second determining unit is configured to perform a determining step to determine a relay resource that the current network needs to reserve.

With reference to the fifth possible implementation manner of the second aspect, in a sixth possible implementation manner of the second aspect, the second determining unit is specifically configured to determine that the third layer of the quasi-reserved resource is used If the number of resources is greater than the number of relay resources used by the second layer of quasi-reserved resources, if yes, the second layer of quasi-reserved resources is used as a relay resource that needs to be reserved by the current network.

In combination with the second aspect, the first to the sixth possible implementation manner of the second aspect, in a seventh possible implementation manner of the second aspect, the fault analyzer is further configured to receive a user request Or the trigger condition set by the user online.

With reference to the second aspect, any one of the first to seventh possible implementation manners of the second aspect, in the eighth possible implementation manner of the second aspect, the fault event includes: a site fault event, a chain Road failure event or shared risk link group failure event.

With reference to the second aspect, the first to the eighth possible implementation manner of the second aspect, in the ninth possible implementation manner of the second aspect, the network-wide network state information includes: wavelength occupation Information and relay resource occupancy information.

In the embodiment of the present invention, the method and device for reserving a relay resource in a rerouting situation, the fault analyzer sending a fault event to a resource reserver; and the resource reservation device sending a fault object request after receiving the fault event a path calculation unit, after receiving the fault object request, the path calculation unit calculates a wavelength resource of the current network, a relay resource, and a path that can be accessed by adding a relay resource according to the network state information of the current network collected by the real-time network. The calculation result is sent to the resource reservation device; the resource reservation device obtains the relay resource that needs to be reserved by the current network according to the received calculation result. The relay resource reservation scheme obtained by the foregoing method and device can eliminate the uncertainty of the use of the relay resource by the dynamic re-routing, and ensure that the service is successfully restored 100%, thereby improving the reserved relay resource in the case of re-routing. effectiveness.

DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly described below. It is obvious that the drawings in the following description are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without paying any creative work.

1 is a flowchart of a method for reserving a relay resource according to Embodiment 1 of the present invention;

2 is a flowchart of a method for reserving a relay resource according to Embodiment 2 of the present invention;

3 and FIG. 4 are schematic diagrams of a fault scenario of a current network according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of an apparatus for reserving a relay resource according to Embodiment 3 of the present invention; FIG.

FIG. 6 is a schematic structural diagram of a resource reservation device according to Embodiment 4 of the present invention; FIG.

FIG. 6b is a schematic structural diagram of another resource reservation device according to Embodiment 4 of the present invention; FIG.

FIG. 7 is a schematic structural diagram of an apparatus for reserving a relay resource according to another embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly described in conjunction with the drawings in the embodiments of the present invention. Some embodiments, rather than all of the embodiments, are invented. 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 specific embodiments of the present invention are further described in detail below with reference to the drawings and embodiments. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

Example 1

1 is a flowchart of a method for reserving a relay resource according to Embodiment 1 of the present invention. As shown in FIG. 1, the method includes:

110: The fault analyzer sends a fault event to the resource reserver;

120: The resource reservation device sends a fault object request to the path calculation unit after receiving the fault event;

130: After receiving the fault object request, the path calculation unit calculates, according to the network-wide network state information of the current network collected in real time, the wavelength resource, the relay resource, and the path that can be accessed by adding the relay resource, and The calculation result is sent to the resource reserver;

140: The resource reservation device obtains, according to the received calculation result, a relay resource that needs to be reserved by the current network.

The method for reserving the relay resource provided by the embodiment of the present invention can eliminate the uncertainty of the use of the relay resource by the dynamic re-routing, and ensure that the service is successfully restored 100%, thereby improving the reserved relay in the case of re-routing. The efficiency of resources.

Example 2

FIG. 2 is a flowchart of a method for reserving a relay resource according to Embodiment 2 of the present invention. As shown in FIG. 2, the method includes:

210: The fault analyzer sends a fault event to the resource reserver.

Specifically, the fault analyzer generally sends a fault event to the resource reserver after receiving a user request or a trigger condition (such as a periodic trigger) set by the user online.

220: The resource reservation device sends a fault object request to the path calculation unit after receiving the fault event.

Specifically, the fault event includes: a site fault event, a link fault event, or a shared risk link group fault event.

230: After receiving the fault object request, the path calculation unit calculates, according to the network-wide network state information of the current network collected in real time, the wavelength resource, the relay resource, and the path that can be accessed by adding the relay resource, and The result of the calculation is sent to the resource reserver.

Specifically, the network-wide state information includes: wavelength occupation information and relay resource occupation information.

240: The resource reservation device obtains, according to the received calculation result, a relay resource that needs to be reserved by the current network.

If a service passes through a site and the optical parameters of the service indicate that the service cannot reach the next site, a relay resource needs to be reserved for the service at the site, and the relay resource is reserved. The local dimension or line dimension of the site.

Specifically, the step 240 includes:

241: The resource reservation device selects an option in an original option group of each service of each fault scenario of the current network, and constitutes a first layer primary option group of each service of each fault scenario of the current network, according to the The first layer of the primary option group obtains the first layer of quasi-reserved resources of the current network.

Specifically, the step 241 includes:

241a: The resource reservation device selects an option that occupies the least number of sites in the original option group of each service of each fault scenario of the current network, and constitutes the first layer of each service of each service in each fault scenario of the current network. Option group.

241b: The resource reservation device selects one option in a first layer primary option group of each service of each fault scenario of the current network to form a first layer advanced option group of the current network; according to the first network of the current network The layer advanced option group determines the first layer of quasi-reserved resources of the current network.

Wherein, the resource reservation device selects one option in the first layer primary option group of each service of each fault scenario of the current network to form the first layer advanced option group of the current network, and may be based on user requirements or some kind The relay resource selection method selects one option in the first layer primary option group of each service of each fault scenario of the current network as the first layer advanced option of each service of each fault scenario of the current network. Specifically, the relay resource selection method may be a far principle, a balance principle, or other algorithms. The principle of far-reaching is to select the option that the first station is farthest from the departure site.

242: The resource reservation device determines, according to the first layer primary option group of each service of each fault scenario of the current network, a required site for each service of each fault scenario of the current network, according to the required site and The relay resource reservation of the current network determines an optional site of the current network.

Specifically, if a site is occupied by all options in the first layer primary option group of the service, the site is a mandatory site for the service. If a site is a mandatory site for any one of the fault scenarios in the current network, the site is a mandatory site of the current network; if a site has reserved trunk resources, the site is a mandatory site of the current network; A site other than the mandatory site of the current network is an optional site for the current network.

243: The resource reservation device disables an optional site of the current network one by one, and determines a second layer of quasi-reserved resources of the current network.

Specifically, the step 243 includes:

243a: If an optional site of the current network is disabled, for each service of each failure scenario of the current network, the resource reservation removes the option of occupying the disabled site in the first layer primary option group of the service. Obtaining a second layer first primary option group of the service; repeating the step to obtain a second layer first primary option group of all services of all failure scenarios of the current network;

243b: for each service of each fault scenario of the current network, the resource reserver is disabled according to the principle of selecting a relay resource, for example, by using the second layer first primary option group of the service. After the site is selected, the second layer of the service is the first advanced option; the step is repeated to obtain the second layer first advanced option of all services of all fault scenarios of the current network, and the second of all services of all fault scenarios of the current network. The first advanced option of the layer constitutes the second layer of the first advanced option group of the current network;

243c: repeating steps 243a and 243b to obtain the second layer second advanced option group of the current network, the second layer third advanced option group, ..., and so on, until all the advanced option groups of the second layer of the current network are obtained;

243d: The resource reserver calculates a second layer quasi-reservation scheme of the current network by using all the advanced option groups of the second layer of the current network according to the principle of using the least number of relay resources.

244: Determine whether the number of the relay resources used by the second layer of the quasi-reserved resources is greater than the quantity of the relay resources used by the first layer of quasi-reserved resources, and if yes, reserve the first layer. The resource acts as a relay resource that needs to be reserved for the current network.

In addition, the step 240 may further include:

245: If the number of the relay resources used by the second layer quasi-reserved resource is smaller than the number of the relay resources used by the first layer quasi-reserved resource, the resource reservation device is disabled one by one except the first optional The other optional sites outside the site determine the third-level quasi-reserved resources of the current network; the first optional site is an optional site that is disabled by using the sub-layer quasi-reserved resources with the least number of relay resources.

246: Determine whether the number of the relay resources used by the third layer of the quasi-reserved resources is greater than the quantity of the relay resources used by the second layer of quasi-reserved resources, and if yes, reserve the second layer. The resource acts as a relay resource that needs to be reserved for the current network.

In addition, when the number of the relay resources used by the third layer quasi-reserved resource is not greater than the number of the relay resources used by the second layer quasi-reserved resource, the third layer pre-preparation of the current network may be removed. The disabled site corresponding to the reserved scheme, and then repeat steps 243a to 243d to obtain the fourth layer quasi-reservation scheme of the current network. Similarly, the fifth layer quasi-reservation scheme can be obtained, and the sixth layer quasi-reservation scheme... until new The obtained quasi-reservation scheme uses more relay resources than the adjacent one-layer quasi-reservation scheme.

250: The resource reservation device sends the relay resource that needs to be reserved in the current network to the fault analyzer.

260: The fault analyzer performs simulation verification on the relay resource that needs to be reserved in the current network, and sends the simulation verification result to the resource reservation device.

270: The resource reservation performs a reservation on the relay resource whose execution result is the pass.

As shown in FIG. 3, in this embodiment, it is assumed that the current network includes two fault scenarios, namely, a fault scenario 1 and a fault scenario 2. The fault scenario 1 is as follows: one service is included, that is, service A, and service A is transmitted from site 1 to site 5, that is, site 1 is the departure site of service A, site 5 is the site of service A, and site 1 and site 5 are The direct path 1 has a failure 1, traffic A needs to be rerouted, site 2 has reserved a relay resource, and if only one of site 2, site 3, and site 4 is occupied, service A cannot be used by the site. 1 Transfer to Site 5. The fault scenario 2 is as follows: a service is included, that is, service B, and service B is transmitted by the site 6 to the site 7 via the site 4, that is, the site 6 is the departure site of the service B, the site 7 is the site of the service B, and the site 6 and the site 7 are A fault 2 occurs between the direct path 2, and service B needs to be rerouted.

It should be noted that, because service A and service B belong to different fault scenarios, the relay resources used by service A and service B do not conflict with each other at the same site, and therefore are reserved in the site occupied by service A and service B. Resources can be used jointly by Service A and Service B.

For service A of fault scenario 1, because path 1 fails, service A can only be transmitted by site 1, through site 2, site 3, and site 4 to site 5. The original option group for Business A is as follows:

Option A1: occupy Site 2 and Site 3, and reserve a relay resource at Site 2 and Site 3;

Option A2: occupy Site 2 and Site 4, and reserve one relay resource at Site 2 and Site 4;

Option A3: occupy station 3 and station 4, and reserve one relay resource at each of station 3 and station 4;

Option A4: Occupy Site 2, Site 3, and Site 4, and reserve one trunk resource at Site 2, Site 3, and Site 4.

For service B of failure scenario 2, since path 2 has a failure 2, service B can only be transferred from station 6 to station 7 via station 4. The original option group for Business B is as follows:

Option B1: Site 4 is occupied and a relay resource is reserved at Site 4.

According to the above step 241, for the service A of the failure scenario 1, the resource reservation 2 calculates that the first layer primary option group of the service A includes the option A1, the option A2, and the option A3 according to the principle that the number of occupied sites is the smallest.

According to the above step 241a, for the service B of the failure scenario 2, the resource reservation 2 calculates that the first layer primary option group of the service B includes the option B1 according to the principle that the number of occupied sites is the smallest.

According to the above step 241b, for the service A of the fault scenario 1, the resource reserver 2 calculates the first layer advanced option of the service A according to the far-reaching principle as the option A3. The specific process of the resource reserver 2 calculating the first layer advanced option of the service A according to the remote principle is the following: the first site of the options A1 and A2 is the site 2, and the first site of the option A3 is the site 3. According to the principle of far, the option A3 is the first level advanced option of the service A.

According to the above step 241b, for the service B of the fault scenario 2, the resource reserver 2 calculates the first layer advanced option of the service B according to the far-reaching principle as the option B1.

According to the above step 241b, the option A3 and the option B1 constitute a first layer quasi-reservation scheme of the current network, and the first layer quasi-reservation scheme needs to reserve one relay resource at each of the station 3 and the station 4, and reserve two reserved. Relay resources.

According to step 242 above, for service A of failure scenario 1, its first layer primary option group includes option A1, option A2, and option A3, Site 1, Site 2, Site 3, Site 4, Site 5, Site 6, and Site 7. None of the sites are occupied by Option A1, Option A2, and Option A3, so Site 1, Site 2, Site 3, Site 4, Site 5, Site 6, and Site 7 are not mandatory sites for Service A.

According to the above step 242, for the service B of the fault scenario 2, the first layer primary option group includes the option B1, and the option B1 occupies only one site, that is, the site 4, so the site 4 is the necessary site of the service B.

According to step 242 above, since site 4 is a mandatory site of service B, and site 2 has reserved a relay resource, site 4 and site 2 are mandatory sites of the current network, and site 1, site 3, site 5, and site 6 And Site 7 are optional sites for the current network.

According to the above step 243, if the site 1 is disabled, for the service A of the fault scenario 1, the resource reserver 2 removes the option of occupying the site 1 in the first layer primary option group of the service A, and obtains the second layer of the service A. The primary option group includes option A1, option A2, and option A3.

If Site 1 is disabled, for Service B of Failure Scenario 2, Resource Reserve 2 removes the option to occupy Site 1 in the first layer primary option group of Service B, and obtains the second primary option group of Service B including the option B1.

If the site 1 is disabled, for the service A of the fault scenario 1, the resource reservation 2 calculates the service A after the site 1 is disabled according to the principle of selecting the relay resource, for example, by the second primary first option group of the service A. The second level of the first advanced option is option A3.

If the station 1 is disabled, for the service B of the fault scenario 2, the resource reservation 2 calculates the disabled service 1 after the site 1 is determined according to the principle of selecting the relay resource, for example, by the second primary first option group of the service B. The second level of the first advanced option is option B1.

If Site 1 is disabled, Option A3 and Option B1 form the second layer first advanced option group of the current network, and the second layer first advanced option group of the current network needs to reserve one relay resource at each of Site 3 and Site 4. A total of two relay resources are reserved.

If station 3 is disabled, for service A of failure scenario 1, resource reservation 2 removes the option of occupying site 3 in the first layer primary option group of service A, and obtains the second layer second primary option group of service A including options A2.

If Site 3 is disabled, for Service B of Failure Scenario 2, Resource Reserve 2 removes the option to occupy Site 3 in the first layer of the Primary Option Group of Service B, and obtains the second layer of the Service B. The second Primary Option Group includes options. B1.

If the site 3 is disabled, for the service A of the failure scenario 1, the resource reservation 2 calculates the service A after the site 3 is disabled according to the principle of selecting the relay resource, for example, the second primary option group of the service A. The second level of the second advanced option is option A2.

If the site 3 is disabled, for the service B of the fault scenario 2, the resource reserver 2 calculates the disabled site 3 after the service B according to the principle of selecting the relay resource, for example, from the second primary option group of the second layer of the service B. The second level of the second advanced option is option B1.

If Site 3 is disabled, Option A2 and Option B1 form the second layer of the second advanced option group of the current network, and the Layer 2 second advanced option group of the current network needs to reserve a relay resource at Site 4.

If the site 5 is disabled, for the service A of the failure scenario 1, the resource reservation 2 removes the option of occupying the site 5 in the first layer primary option group of the service A, and obtains the second layer third primary option group of the service A including the option A1, option A2, and option A3.

If the site 5 is disabled, for the service B of the failure scenario 2, the resource reservation 2 removes the option of occupying the site 5 in the first layer primary option group of the service B, and obtains the second layer third primary option group of the service B including the option B1.

If the site 5 is disabled, for the service A of the failure scenario 1, the resource reservation 2 calculates the traffic A after the site 5 is disabled according to the principle of selecting the relay resource, for example, the second primary option group of the service A. The second level of the third advanced option is option A3.

If the site 5 is disabled, for the service B of the failure scenario 2, the resource reservation 2 calculates the disabled site 5 after the service B according to the principle of selecting the relay resource, for example, the second primary option group of the service B. The second level of the third advanced option is option B1.

If Site 5 is disabled, Option A3 and Option B1 form the second layer of the third advanced option group of the current network. The Layer 2, third advanced option group of the current network needs to reserve one relay resource at each of Site 3 and Site 4. A total of two relay resources are reserved.

If the site 6 is disabled, for the service A of the failure scenario 1, the resource reservation 2 removes the option of occupying the site 6 in the first layer primary option group of the service A, and obtains the second layer fourth primary option group of the service A including the option A1, option A2, and option A3.

If the site 6 is disabled, for the service B of the failure scenario 2, the resource reservation 2 removes the option of occupying the site 6 in the first layer primary option group of the service B, and obtains the second layer fourth primary option group of the service B including the option B1.

If the site 6 is disabled, for the service A of the failure scenario 1, the resource reservation 2 calculates the service A after the disabled site 6 is calculated from the second layer fourth primary option group of the service A according to the principle of selecting the relay resource. The second level of the fourth advanced option is option A3.

If the site 6 is disabled, for the service B of the failure scenario 2, the resource reservation 2 calculates the disabled site 6 after the service B according to the principle of selecting the relay resource, for example, the second primary option group of the second layer of the service B. The second level of the fourth advanced option is option B1.

If Site 6 is disabled, Option A3 and Option B1 form the second layer of the fourth advanced option group of the current network. The Layer 2, the fourth advanced option group of the current network needs to reserve one relay resource at each of Site 3 and Site 4. A total of two relay resources are reserved.

If the site 7 is disabled, for the service A of the failure scenario 1, the resource reservation 2 removes the option of occupying the site 7 in the first layer primary option group of the service A, and obtains the second layer fifth primary option group of the service A including the option A1, option A2, and option A3.

If the site 7 is disabled, for the service B of the failure scenario 2, the resource reservation 2 removes the option of occupying the site 7 in the first layer primary option group of the service B, and obtains the second layer fifth primary option group of the service B including the option B1.

If the station 7 is disabled, for the service A of the failure scenario 1, the resource reservation 2 calculates the service A after the disabled site 7 is calculated from the second layer fifth primary option group of the service A according to the principle of selecting the relay resource. The second level of the fifth advanced option is option A3.

If the site 7 is disabled, for the service B of the failure scenario 2, the resource reservation 2 calculates the disabled site 7 after the service B according to the principle of selecting the relay resource, for example, the second primary option group of the service B. The second level of the fifth advanced option is option B1.

If station 7 is disabled, option A3 and option B1 form the second layer fifth advanced option group of the current network, and the second layer fifth advanced option group of the current network needs to reserve one relay resource at each of station 3 and station 4. A total of two relay resources are reserved.

The resource reserver 2 calculates the second layer quasi-reservation scheme of the current network by using all the advanced option groups of the second layer of the current network according to the principle of using the least number of relay resources as option A2 and option B1, that is, at station 4 Leave a relay resource.

As shown in FIG. 4, the site 3 is removed. If the site 1 is disabled, for the service A of the failure scenario 1, the resource reservation 2 removes the option of occupying the site 1 in the first layer primary option group of the service A, and obtains the service A. The third level first primary option group includes option A1, option A2, and option A3.

Remove site 3, if site 1 is disabled, for service B of failure scenario 2, resource reservation 2 removes the option of occupying site 1 in the first-level primary option group of service B, and obtains the third-level first primary of service B. The option group includes option B1.

Remove site 3, if site 1 is disabled, for service A of failure scenario 1, resource reservation 2 calculates the disabled site from the third primary first option group of service A according to the principle of selecting the relay resource, for example, on the far principle The third advanced option of the third layer of Service A is Option A3.

Remove site 3, if site 1 is disabled, for service B of failure scenario 2, resource reservation 2 calculates the disabled site from the third primary first option group of service B according to the principle of selecting the relay resource, for example, on the far principle After the first layer of business B, the first advanced option is option B1.

Remove Site 3, if Site 1 is disabled, Option A3 and Option B1 form the Layer 3 first advanced option group of the current network. The Layer 3 first advanced option group of the current network needs to reserve one for each of Site 3 and Site 4. Relay resources, a total of two relay resources are reserved.

Remove site 3, if site 5 is disabled, for service A of failure scenario 1, resource reservation 2 removes the option of occupying site 5 in the first layer primary option group of service A, and obtains the third layer of service A. The option group includes option A1, option A2, and option A3.

Remove site 3, if site 5 is disabled, for service B of failure scenario 2, resource reservation 2 removes the option of occupying site 5 in the first-level primary option group of service B, and obtains the third-level second primary of service B. The option group includes option B1.

Site 3 is removed. If site 5 is disabled, for service A of failure scenario 1, resource reservation 2 calculates the disabled site from the third primary option group of service A according to the principle of selecting the relay resource, for example, on the far principle. After the 5th business, the third level of the second advanced option is option A3.

Remove site 3, if site 5 is disabled, for service B of failure scenario 2, resource reservation 2 calculates the disabled site from the third primary option group of service B according to the principle of selecting the relay resource, for example, on the far principle The second advanced option of the third layer of business B after 5 is option B1.

Site 3 is removed. If Site 5 is disabled, Option A3 and Option B1 form the Layer 3 second advanced option group of the current network. The Layer 3 second advanced option group of the current network needs to reserve one for each of Site 3 and Site 4. Relay resources, a total of two relay resources are reserved.

Site 3 is removed. If Site 6 is disabled, for Service A of Failure Scenario 1, Resource Reserve 2 removes the option of occupying Site 6 in the first-level primary option group of Service A, and obtains the third-level third primary of Service A. The option group includes option A1, option A2, and option A3.

Remove site 3, if site 6 is disabled, for service B of failure scenario 2, resource reservation 2 removes the option of occupying site 6 in the first layer primary option group of service B, and obtains the third layer third primary of service B. The option group includes option B1.

Site 3 is removed. If site 6 is disabled, for service A of failure scenario 1, resource reservation 2 calculates the disabled site from the third-level third primary option group of service A according to the principle of selecting the relay resource, for example, on the far principle. The third level third advanced option of Service A after 6 is Option A3.

Remove site 3, if site 6 is disabled, for service B of failure scenario 2, resource reservation 2 calculates the disabled site from the third primary third option group of service B according to the principle of selecting the relay resource, for example, on the far principle After the 6th business, the third level third advanced option is option B1.

Remove site 3, if site 6 is disabled, option A3 and option B1 form the third layer third advanced option group of the current network, and the third layer third advanced option group of the current network needs to reserve one for each of site 3 and site 4. Relay resources, a total of two relay resources are reserved.

Site 3 is removed. If Site 7 is disabled, for Service A of Failure Scenario 1, Resource Reserve 2 removes the option of occupying Site 7 in the first-level primary option group of Service A, and obtains the third-level fourth primary of Service A. The option group includes option A1, option A2, and option A3.

Remove site 3, if site 7 is disabled, for service B of failure scenario 2, resource reservation 2 removes the option of occupying site 7 in the first-level primary option group of service B, and obtains the third-level fourth primary of service B. The option group includes option B1.

Site 3 is removed. If site 7 is disabled, for service A of failure scenario 1, resource reservation 2 calculates the disabled site from the third primary option group of service A according to the principle of selecting the relay resource, for example, on the far principle. After the 7th business, the third level of the fourth advanced option is option A3.

Remove site 3, if site 7 is disabled, for service B of failure scenario 2, resource reservation 2 calculates the disabled site from the third primary option group of service B according to the principle of selecting the relay resource, for example, on the far principle After the 7th business, the third level of the fourth advanced option is option B1.

Remove Site 3, if Site 7 is disabled, Option A3 and Option B1 form the third layer of the current network, the fourth advanced option group, the third layer of the current network, the fourth advanced option group needs to reserve one for each of Site 3 and Site 4. Relay resources, a total of two relay resources are reserved.

The resource reserver 2 calculates, according to the principle of using the least number of relay resources, the third layer quasi-reservation scheme of the current network is selected by all the advanced option groups of the third layer of the current network as option A3 and option B1, that is, at station 3 and Each of the stations 4 reserves one relay resource, and a total of two relay resources are reserved.

Since the third layer quasi-reservation scheme needs to reserve two relay resources, the second layer quasi-reservation scheme needs to reserve one relay resource, and the third layer quasi-reservation scheme uses the number of relay resources larger than the second layer. The number of relay resources used by the quasi-reservation scheme, so the quasi-reservation schemes of all layers of the current network are the first-level quasi-reservation scheme, the second-layer quasi-reservation scheme, and the third-layer quasi-reservation scheme.

According to the above step 246, the resource reservation 2 calculates the current network from the first layer quasi-reservation scheme, the second layer quasi-reservation scheme and the third layer quasi-reservation scheme of the current network according to the principle of using the least number of relay resources. The reservation scheme is a second layer quasi-reservation scheme, that is, one relay resource is reserved at the station 4.

Example 3

FIG. 5 is a schematic structural diagram of an apparatus for reserving a relay resource according to Embodiment 3 of the present invention. As shown in FIG. 5, the apparatus 500 includes: a fault analyzer 510, a resource reserver 520, and a path calculation unit 530. .

The fault analyzer 510 is configured to send a fault event to the resource reserver 520. In addition, the fault analyzer 510 is further configured to receive a trigger condition of a user request or a user online setting. The fault events include: a site fault event, a link fault event, or a shared risk link group fault event.

The resource reserver 520 is configured to send a fault object request to the path calculation unit 530 after receiving the fault event.

The path calculation unit 530 is configured to calculate a wavelength resource, a relay resource, and a path that can be accessed by adding a relay resource according to the network state information of the current network that is collected in real time after receiving the fault object request. The calculation result is sent to the resource reserver 520. The network-wide status information includes: wavelength occupation information and relay resource occupation information.

The resource reserver 520 is further configured to obtain, according to the received calculation result, a relay resource that needs to be reserved by the current network.

Example 4

In this embodiment, the resource reserver 520 is further configured to send the relay resource that needs to be reserved in the current network to the fault analyzer 510;

The fault analyzer 510 is configured to perform simulation verification on the relay resource that needs to be reserved in the current network, and send the simulation verification result to the resource reserver 520;

The resource reserver 520 is further configured to perform a reservation on the relay resource whose execution result is the pass.

In addition, the fault analyzer is further configured to receive a trigger condition of a user request or a user online setting.

FIG. 6 is a schematic structural diagram of a resource reservation device according to Embodiment 4 of the present invention. As shown in FIG. 6a, the resource reservation device 520 includes: a first reservation unit 521, an optional site unit 522, and a second pre- The unit 523 and the first judging unit 524.

The first reservation unit 521 is configured to select an option in an original option group of each service of each fault scenario of the current network, and form a first layer primary option group of each service of each fault scenario of the current network. And obtaining, according to the first layer primary option group, a first layer of quasi-reserved resources of the current network.

The first reserved unit 521 includes:

The optional site unit 522 is configured to determine, according to the first layer primary option group of each service of each fault scenario of the current network, a required site for each service of each fault scenario of the current network, according to the mandatory The relay resource reservations for the site and the current network determine the optional sites for the current network.

The second reservation unit 523 is configured to disable an optional site of the current network one by one, and determine a second layer of reserved resources of the current network. The second reserved unit is specifically configured to disable an optional site of the current network one by one, obtain a sub-layer quasi-reserved resource, and use the sub-layer quasi-reserved resource with the least number of relay resources as the current network. The second layer reserves resources.

The first determining unit 524 is configured to determine whether the number of relay resources used by the second layer of quasi-reserved resources is greater than the number of relay resources used by the first layer of quasi-reserved resources, and if so, The first layer of quasi-reserved resources is used as a relay resource that needs to be reserved by the current network.

Referring additionally to FIG. 6b, the resource reserver 520 may further include:

a third reservation unit 525, configured to: if the number of the relay resources used by the second layer of quasi-reserved resources is smaller than the quantity of the relay resources used by the first layer of quasi-reserved resources, the resource reserver Deleting the optional sites other than the first optional site one by one to determine the third-level quasi-reserved resources of the current network; the first optional site is to reserve resources by using the sub-layers with the least number of relay resources Corresponding to the disabled optional site;

The second determining unit 526 is configured to perform a determining step to determine a relay resource that the current network needs to reserve.

The second determining unit 526 may be specifically configured to determine whether the number of the relay resources used by the third layer of the reserved resources is greater than the number of the relay resources used by the second layer of the reserved resources, and if so, The second layer of quasi-reserved resources is used as a relay resource that needs to be reserved by the current network.

The embodiment of the invention further provides a device for reserving relay resources, as shown in FIG. 7 . The device for reserving the relay resource in this embodiment may include: a processor 701, a memory 702, and a communication interface 703, where:

Specifically, the communication interface 703 is configured to receive a user request or a trigger condition set by the user online; the memory 702 is configured to store the program instruction; the processor 701 is configured to invoke the memory 702 after receiving the trigger condition of the user request or the online setting of the user. The program instructions stored in, perform the following operations:

The fault analyzer sends a fault event to the resource reserver;

The processor 701 can be a central processing unit (central processing unit, CPU), application-specific integrated circuit ASIC) and so on. The terminal in this embodiment may include a bus 704. The processor 701, the memory 702, and the communication interface 703 can be connected and communicated via the bus 704. The memory 702 may include: a random access memory (random Access memory, RAM), read-only memory (ROM), disk and other entities with storage functions;

The processor 701 can also be used to perform the steps described in FIG. 2 in the method embodiment, and the embodiments of the present invention are not described in detail herein. A person skilled in the art may understand that all or part of the various steps of the foregoing embodiments may be performed by a program to instruct related hardware. The program may be stored in a computer readable storage medium, and the storage medium may include: Read only memory, random access memory, disk or optical disk, etc.

The content of the information exchange, the execution process, and the like between the units in the foregoing embodiment are based on the same concept as the method embodiment of the present invention. For details, refer to the description in the method embodiment of the present invention, and details are not described herein again.

Those of ordinary skill in the art will appreciate that various aspects of the present invention, or possible implementations of various aspects, may be embodied as a system, method, or computer program product. Thus, aspects of the invention, or possible implementations of various aspects, may employ an entirely hardware embodiment, an entirely software embodiment Forms (including firmware, resident software, etc.), or combinations of software and hardware aspects, are collectively referred to herein as "circuits," "units," or "systems." Furthermore, aspects of the invention, or possible implementations of various aspects, may take the form of a computer program product, which is a computer readable program code stored in a computer readable medium.

The computer readable medium can be a computer readable signal medium or a computer readable storage medium. Computer readable storage media includes, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, Device or device, or any suitable combination of the foregoing, such as random access memory (RAM), read only memory (ROM), erasable programmable read only memory (EPROM or flash memory), optical fiber, portable read only memory (CD-ROM).

The processing unit in the computer reads the computer readable program code stored in the computer readable medium such that the processing unit is capable of performing the functional actions specified in each step or combination of steps in the flowchart; A device that functions as specified in each block, or combination of blocks.

The computer readable program code can execute entirely on the user's computer, partly on the user's computer, as a separate software package, partly on the user's computer and partly on the remote computer, or entirely on the remote computer or out of range alarm server Execute on. It should also be noted that in some alternative implementations, the functions noted in the various steps in the flowcharts or in the blocks in the block diagrams may not occur in the order noted. For example, two steps, or two blocks, shown in succession may be executed substantially concurrently or the blocks may be executed in the reverse order.

It will be apparent to those skilled in the art that various modifications and changes can be made in the present invention without departing from the scope of the invention. Thus, it is intended that the present invention cover the modifications and modifications of the invention

Claims

Claim

A method for reserving a relay resource, the method comprising the steps of:

The fault analyzer sends a fault event to the resource reserver;

Receiving, by the resource reservation, the fault object request to the path calculation unit after receiving the fault event;

After receiving the fault object request, the path calculation unit calculates a wavelength resource of the current network, a relay resource, and a path that can be accessed by adding a relay resource according to the network state information of the current network collected by the real-time network, and the calculation result is obtained. Sent to the resource reserver;

The resource reservation device obtains a relay resource that needs to be reserved by the current network according to the received calculation result.

2. The method of claim 1 wherein the method further comprises the steps of:

The resource reservation device sends the relay resource that needs to be reserved in the current network to the fault analyzer;

The fault analyzer performs simulation verification on the relay resources that need to be reserved in the current network, and sends the simulation verification result to the resource reservation device;

The resource reserver performs a reservation on the relay resource that is passed through the simulation verification result.

The method according to claim 1 or 2, wherein the resource reservation device obtains the relay resource that needs to be reserved by the current network according to the received calculation result, and specifically includes:

The resource reservation device selects an option in an original option group of each service of each fault scenario of the current network, and constitutes a first layer primary option group of each service of each fault scenario of the current network, according to the first The first layer of the primary option group obtains the first layer of quasi-reserved resources of the current network;

Determining, by the resource reservation, a mandatory site for each service of each fault scenario of the current network according to the first layer primary option group of each service of each fault scenario of the current network, according to the required site and the current network The relay resource reservation determines the optional site of the current network;

The resource reserver disables the optional site of the current network one by one, and determines the second layer of the reserved resources of the current network;

Determining whether the number of the relay resources used by the second layer of the quasi-reserved resources is greater than the number of the relay resources used by the first layer of quasi-reserved resources, and if so, using the first layer of quasi-reserved resources as The current network needs to reserve reserved relay resources.

The method according to claim 3, wherein the resource reserver selects an option in an original option group of each service of each fault scenario of the current network to form each fault scenario of the current network. The first layer of the primary option group of each service obtains the first layer of quasi-reserved resources of the current network according to the first layer of the primary option group, and specifically includes:

The resource reserver selects an option that occupies the least number of sites in the original option group of each service of each fault scenario of the current network, and constitutes a first layer primary option group of each service of each fault scenario of the current network. ;

The resource reserver selects one option in the first layer primary option group of each service of each fault scenario of the current network to form a first layer advanced option group of the current network; according to the first layer of the current network The option group determines the first layer of quasi-reserved resources of the current network.

The method according to claim 3 or 4, wherein the resource reserver disables the optional site of the current network one by one, and determines the second layer of the reserved resources of the current network, which specifically includes:

The resource reservation device disables the optional site of the current network one by one, obtains the sub-layer quasi-reserved resource, and uses the sub-layer quasi-reserved resource with the least number of relay resources as the second-level quasi-reserved resource of the current network. .

The method of claim 5, wherein the resource reserver obtains the relay resource that the current network needs to reserve according to the received calculation result, and further includes:

If the number of relay resources used by the second layer of quasi-reserved resources is smaller than the number of relay resources used by the first layer of quasi-reserved resources, the resource reserves are disabled one by one except the first optional site. The other optional site determines a third layer of quasi-reserved resources of the current network; the first optional site is an optional site that is disabled by using the sub-layer quasi-reserved resources with the least number of relay resources;

The execution determining step determines the relay resources that the current network needs to reserve.

The method according to claim 6, wherein the performing the determining step determines the relay resource that the current network needs to reserve, and specifically includes: determining the relay resource used by the third layer of the quasi-reserved resource Whether the quantity is greater than the number of the relay resources used by the second layer of the quasi-reserved resources. If yes, the second layer of quasi-reserved resources is used as the relay resource that needs to be reserved by the current network.

The method according to any one of claims 1 to 7, wherein before the fault analyzer sends a fault event to the resource reserver, the method further includes:

The fault analyzer receives trigger conditions for user requests or user online settings.

The method of any of claims 1-8, wherein the fault event comprises a site fault event, a link fault event, or a shared risk link group fault event.

The method according to any one of claims 1 to 9, wherein the network-wide status information comprises: wavelength occupancy information and relay resource occupancy information.

A device for reserving a relay resource, the device comprising: a fault analyzer, a resource reserver, and a path calculation unit;

The fault analyzer is configured to send a fault event to the resource reserver;

The resource reserver is configured to send a fault object request to the path calculation unit after receiving the fault event;

The path calculation unit is configured to calculate a wavelength resource, a relay resource, and a path that can be accessed by adding a relay resource according to the network state information of the current network collected by the real-time network, after receiving the fault object request, and Sending a calculation result to the resource reserver;

The resource reservation is further configured to obtain, according to the received calculation result, a relay resource that needs to be reserved by the current network.

12. Apparatus according to claim 11 wherein:

The resource reservation is further configured to send, to the fault analyzer, a relay resource that needs to be reserved in the current network;

The fault analyzer is configured to perform simulation verification on a relay resource that needs to be reserved in the current network, and send a simulation verification result to the resource reservation device;

The resource reserver is further configured to perform a reservation on the relay resource that is passed through the simulation verification result.

13. The apparatus of claim 11 or 12, wherein the resource reserver comprises:

a first reserved unit, configured to select an option in an original option group of each service of each fault scenario of the current network, and constitute a first layer primary option group of each service of each fault scenario of the current network, according to the The first layer primary option group obtains the first layer of quasi-reserved resources of the current network;

An optional site unit, configured to determine, according to the first layer primary option group of each service of each fault scenario of the current network, a required site for each service of each fault scenario of the current network, according to the required site and current The relay resource reservation of the network determines an optional site of the current network;

a second reserved unit, configured to disable an optional site of the current network one by one, and determine a second layer of quasi-reserved resources of the current network;

a first determining unit, configured to determine whether the number of relay resources used by the second layer of quasi-reserved resources is greater than the number of relay resources used by the first layer of quasi-reserved resources, and if so, A layer of quasi-reserved resources is used as a relay resource reserved by the current network.

14. The apparatus of claim 13, wherein the first reserved unit comprises:

The first primary module is configured to select an option that occupies the least number of sites in the original option group of each service of each fault scenario of the current network, and constitutes a first layer primary option of each service of each fault scenario of the current network. group;

a first reservation module, configured to select one of the first layer primary option groups of each service in each fault scenario of the current network to form a first layer advanced option group of the current network; according to the first of the current network The layer advanced option group determines the first layer of quasi-reserved resources of the current network.

The device according to claim 13 or 14, wherein the second reserved unit is specifically configured to disable an optional site of the current network one by one, obtain a sub-layer quasi-reserved resource, and use the number of relay resources. The least of the sub-layer quasi-reserved resources serve as the second layer of quasi-reserved resources of the current network.

The device of claim 15, wherein the resource reserver further comprises:

a third reserved unit, configured to: if the number of the relay resources used by the second layer of the quasi-reserved resources is smaller than the quantity of the relay resources used by the first layer of the quasi-reserved resources, the resource reserves are one by one Deactivating a third-layer quasi-reserved resource of the current network, and selecting the third-layer quasi-reserved resource of the current network, where the first optional site is the sub-layer quasi-reserved resource corresponding to the least number of the relay resources Disabled optional site;

The second determining unit is configured to perform a determining step to determine a relay resource that the current network needs to reserve.

The device according to claim 16, wherein the second determining unit is specifically configured to determine whether the number of relay resources used by the third layer of quasi-reserved resources is greater than the second layer pre-predetermined The number of the relay resources used by the reserved resources. If yes, the second-level quasi-reserved resources are used as the relay resources that need to be reserved in the current network.

The device according to any one of claims 11 to 17, wherein the fault analyzer is further configured to receive a trigger condition of a user request or a user online setting.

19. Apparatus according to any one of claims 11 to 18, wherein the fault event comprises a site fault event, a link fault event or a shared risk link group fault event.

The device according to any one of claims 11 to 19, wherein the network-wide status information comprises: wavelength occupancy information and relay resource occupancy information.