CN106453145B - Transmission link control method and device - Google Patents
Transmission link control method and device Download PDFInfo
- Publication number
- CN106453145B CN106453145B CN201510493366.1A CN201510493366A CN106453145B CN 106453145 B CN106453145 B CN 106453145B CN 201510493366 A CN201510493366 A CN 201510493366A CN 106453145 B CN106453145 B CN 106453145B
- Authority
- CN
- China
- Prior art keywords
- layer link
- optical layer
- information
- link
- data packet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The invention discloses a transmission link control method, the transmission link includes optical layer link and Internet Protocol (IP) layer link, the method includes: acquiring resource occupation information of each wavelength on the optical layer link; and determining an optical layer link required for transmitting the data packet from each optical layer link path corresponding to the data packet according to the routing information of the IP layer link selected for the data packet and the acquired resource occupation information of each wavelength on the optical layer link. The invention also discloses a transmission link control device.
Description
Technical Field
The present invention relates to Software Defined Network (SDN) technologies, and in particular, to a transmission link control method and apparatus.
Background
The core idea of the SDN technology is as follows: the control plane and the data plane of the network are separated, and the optimization control of the network flow is realized in a centralized control mode. Therefore, the flexible control of the network flow is realized, and the network becomes more intelligent as a pipeline.
In SDN, currently, an Internet Protocol (IP) layer and an optical layer are separately and independently controlled, in other words, an IP layer controller is responsible for managing resources of the IP layer, and an optical layer controller is responsible for resources of the optical layer, that is, a hierarchical management mode is implemented. In addition, the current SDN-based solutions, prototypes, tests and products are usually designed only for packet layer (IP layer) related network elements and protocols.
Due to the implementation of the hierarchical management mode, in general, in order to ensure the transmission reliability of data, redundancy and protection schemes of links are deployed at an IP layer and an optical layer, for example, 1:1(N) link protection scheme to ensure the reliability of transmission, which results in more resource waste.
Disclosure of Invention
In order to solve the existing technical problem, embodiments of the present invention provide a transmission link control method and apparatus.
In order to achieve the above purpose, the technical solution of the embodiment of the present invention is realized as follows:
the embodiment of the invention provides a transmission link control method, wherein the transmission link comprises an optical layer link and an IP layer link, and the method comprises the following steps:
acquiring resource occupation information of each wavelength on the optical layer link;
and determining an optical layer link required for transmitting the data packet from each optical layer link path corresponding to the data packet according to the routing information of the IP layer link selected for the data packet and the acquired resource occupation information of each wavelength on the optical layer link.
In the foregoing solution, the determining, according to the routing information of the IP layer link selected for the data packet and the acquired resource occupation information of each wavelength on the optical layer link, an optical layer link required for transmitting the data packet from each optical layer link path corresponding to the data packet includes:
obtaining each optical layer link path corresponding to the data packet by using the routing information and combining a network topology structure;
acquiring resource use information on the wavelength corresponding to each optical layer link path by using the acquired resource occupation information of each wavelength on the optical layer link;
and determining the optical layer link required for transmitting the data packet according to the resource use information on the wavelength corresponding to each optical layer link path.
In the above scheme, the obtaining resource usage information on the wavelength corresponding to each optical layer link path by using the obtained resource occupancy information includes:
acquiring load information and use attributes on the wavelengths corresponding to the link paths of the optical layers by using the acquired spare resource information on the wavelengths;
and obtaining link service priority matching information on the wavelength corresponding to each optical layer link path by using the obtained link service priority corresponding to each wavelength and the service priority corresponding to the data packet.
In the foregoing solution, the determining, according to the resource usage information on the wavelength corresponding to each optical layer link path, the optical layer link required for transmitting the data packet includes:
and determining the optical layer link required for transmitting the data packet according to the load information, the use attribute and the corresponding link service priority matching information on the wavelength corresponding to each optical layer link path.
In the above scheme, the determining, according to the load information on the wavelength corresponding to each optical layer link path and the corresponding link service priority matching information, the optical layer link required for transmitting the data packet is as follows:
selecting an available optical layer link path from the optical layer link paths according to the load information and the use attribute on the wavelength corresponding to the optical layer link path;
and determining the optical layer link required for transmitting the data packet from the available optical layer link path according to the link service priority matching information on the corresponding wavelength of the available optical layer link path.
In the above scheme, the method further comprises:
acquiring all routing related information of an IP layer link of the data packet;
and selecting one route from all the routes of the IP layer link as the IP layer link required for transmitting the data packet according to the resource occupation information of each route in the acquired related information of all the routes of the IP layer link.
In the above scheme, the method further comprises:
when an optical layer link required for transmitting a data packet is determined to be unsuitable according to routing information of an IP layer link selected for the data packet and acquired resource occupation information of each wavelength on the optical layer link, selecting a new route from all the routes of the IP layer link as the IP layer link required for transmitting the data packet according to the acquired resource occupation information of each route in all the route related information of the IP layer link of the data packet;
and re-determining the optical layer link required for transmitting the data packet by utilizing the routing information of the newly selected IP layer link and the acquired resource occupation information of each wavelength on the optical layer link.
In the above scheme, the acquiring resource occupation information of each wavelength on the optical layer link includes:
and acquiring resource occupation information of each wavelength on the optical layer link through interaction with network equipment corresponding to the optical layer link.
In the above scheme, the obtaining of all the routing related information of the IP layer link of the data packet includes:
and acquiring all routing related information of the IP layer link of the data packet through interaction with the network equipment corresponding to the IP layer link.
The embodiment of the invention also provides a transmission link control device, wherein the transmission link comprises an optical layer link and an IP layer link; the device comprises: a wavelength resource monitoring module and a routing resource matching module; wherein the content of the first and second substances,
the wavelength resource monitoring module is used for acquiring resource occupation information of each wavelength on an optical layer link of the transmission link;
the routing resource matching module is configured to determine, from each optical layer link path corresponding to the data packet, an optical layer link required for transmitting the data packet according to routing information of an IP layer link selected for the data packet and acquired resource occupation information of each wavelength on the optical layer link.
In the foregoing solution, the routing resource matching module includes: the device comprises a first determining module, a second determining module and a third determining module; wherein the content of the first and second substances,
the first determining module is configured to obtain, by using the routing information and in combination with a topology structure of the network, each optical layer link path corresponding to the data packet;
the second determining module is configured to obtain resource usage information on wavelengths corresponding to optical layer link paths by using the obtained resource occupancy information of each wavelength on the optical layer link;
and the third determining module is configured to determine, according to the resource usage information on the wavelength corresponding to each optical layer link path, an optical layer link required for transmitting the data packet.
In the foregoing solution, the second determining module is specifically configured to: acquiring load information and use attributes on the wavelengths corresponding to the link paths of the optical layers by using the acquired spare resource information on the wavelengths; and obtaining link service priority matching information on the wavelength corresponding to each optical layer link path by using the obtained link service priority corresponding to each wavelength and the service priority corresponding to the data packet.
In the foregoing solution, the third determining module is specifically configured to: and determining the optical layer link required for transmitting the data packet according to the load information, the use attribute and the corresponding link service priority matching information on the wavelength corresponding to each optical layer link path.
In the above scheme, the apparatus further comprises: the IP layer link route related information acquisition module is used for acquiring all route related information of the IP layer link of the data packet;
correspondingly, the route resource matching module is further configured to select one route from the routes of the IP layer link as the IP layer link required for transmitting the data packet according to the resource occupation information of each route in the acquired relevant information of all routes of the IP layer link.
In the foregoing solution, the wavelength resource monitoring module is specifically configured to:
and acquiring resource occupation information of each wavelength on the optical layer link through interaction with network equipment corresponding to the optical layer link.
In the foregoing solution, the IP layer link route related information obtaining module is specifically configured to: and acquiring all routing related information of the IP layer link of the data packet through interaction with the network equipment corresponding to the IP layer link.
The transmission link control method and the transmission link control device provided by the embodiment of the invention obtain the resource occupation information of each wavelength on the optical layer link; the optical layer link required for transmitting the data packet is determined from each optical layer link path corresponding to the data packet according to the routing information of the IP layer link selected for the data packet and the acquired resource occupation information of each wavelength on the optical layer link.
Drawings
In the drawings, which are not necessarily drawn to scale, like reference numerals may describe similar components in different views. Like reference numerals having different letter suffixes may represent different examples of similar components. The drawings illustrate generally, by way of example, but not by way of limitation, various embodiments discussed herein.
Fig. 1 is a flow chart illustrating a method for controlling a transmission link according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a transmission link control apparatus according to a second embodiment of the present invention;
fig. 3 is a schematic structural diagram of a second transmission link control apparatus according to a second embodiment of the present invention;
fig. 4 is a schematic structural diagram of a second third transmission link control apparatus according to an embodiment of the present invention;
FIG. 5 is a diagram illustrating a network architecture according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a network architecture of three transport layers according to the embodiment of the present invention;
fig. 7 is a schematic diagram of a three-packet switching path according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Prior to describing embodiments of the present invention, the relevant status of SDN is known.
In SDNs, the transfer of data is done via a number of devices, including routers, switches, (optical) cross-connect devices, etc. From a network architecture perspective, these different devices are located at different levels of the network. For example, a router is generally an IP layer device, content processed on the router is an IP packet, the router cannot generally see the format of a data packet transmitted by an underlying layer, and therefore cannot process data of other layers, and an SDN controller based on the IP layer generally processes data at an IP routing layer, and cannot process data of other layers. In fact, the data of the IP layer is finally encapsulated in the transport layer, and the transport layer device transfers information, while the connection of the link of the current optical transport layer device mainly based on the optical medium is static, and the related control of the optical layer is not as flexible as the IP layer. More importantly, at present, if the SDN can realize the control of an IP layer network, the SDN-based control cannot be realized at an optical transmission layer. Currently, an IP layer and an optical transmission layer are separately and independently controlled, and generally, in order to ensure the transmission reliability of data, redundancy and protection schemes of links need to be respectively deployed at the IP layer and the optical layer, for example, 1:1(N) to ensure reliability of transmission.
Due to the fact that the hierarchical control of each layer is achieved, the network layer and the transmission layer equipment need corresponding link redundancy protection mechanisms to guarantee the reliability of network transmission, and therefore more link resource redundancy can be caused.
Based on this, in various embodiments of the invention: acquiring resource occupation information of each wavelength on an optical layer link; and determining an optical layer link required for transmitting the data packet from each optical layer link path corresponding to the data packet according to the routing information of the IP layer link selected for the data packet and the acquired resource occupation information of each wavelength on the optical layer link.
Example one
The transmission link control method provided by this embodiment, as shown in fig. 1, includes the following steps;
step 101: acquiring resource occupation information of each wavelength on an optical layer link;
here, it should be noted that: the transmission link of the embodiment includes: optical layer links and IP layer links.
In this step, the obtained resource occupation information of each wavelength on the optical layer link refers to: in the SDN, all optical layer transmission devices (network devices corresponding to the entire optical layer link) form resource occupation information of each wavelength on the entire optical layer link.
Specifically, the resource occupation information of each wavelength on the optical layer link is acquired through interaction with the network device corresponding to the optical layer link.
The acquired resource occupation information of each wavelength on the optical layer link may include: information on whether it has been filled with data packet resources, if not, which specific spaces are available, usage attributes, service priority, etc.
Wherein the usage attributes may include: whether to allow transmission of data packets, etc., the service priority refers to the quality of service level that the link can carry, such as: guaranteed quality of service (Premium/Gold), best effort delivered (best effort), Unclassified (unsorted) traffic, etc.
In practical application, the acquired resource occupation information of each wavelength on the optical layer link can be presented in a form of a table, so that the resource occupation information of each wavelength, such as the content shown in table 1, can be clearly and intuitively seen.
TABLE 1
Step 102: and determining an optical layer link required for transmitting the data packet from each optical layer link path corresponding to the data packet according to the routing information of the IP layer link selected for the data packet and the acquired resource occupation information of each wavelength on the optical layer link.
Specifically, each optical layer link path corresponding to the data packet is obtained by using the routing information and combining a network topology structure;
acquiring resource use information on the wavelength corresponding to each optical layer link path by using the acquired resource occupation information of each wavelength on the optical layer link;
and determining the optical layer link required for transmitting the data packet according to the resource use information on the wavelength corresponding to each optical layer link path.
Wherein the routing information may include: a source IP address, a destination IP address, and next hop information.
The obtaining, by using the obtained resource occupation information, resource usage information on a wavelength corresponding to each optical layer link path specifically includes:
acquiring load information and use attributes on the wavelengths corresponding to the link paths of the optical layers by using the acquired spare resource information on the wavelengths;
and obtaining link service priority matching information on the wavelength corresponding to each optical layer link path by using the obtained link service priority corresponding to each wavelength and the service priority corresponding to the data packet.
The determining, according to the resource usage information on the wavelength corresponding to each optical layer link path, the optical layer link required for transmitting the data packet specifically includes:
and determining the optical layer link required for transmitting the data packet according to the load information, the use attribute and the corresponding link service priority matching information on the wavelength corresponding to each optical layer link path.
Determining the optical layer link required for transmitting the data packet according to the load information on the wavelength corresponding to each optical layer link path and the corresponding link service priority matching information, specifically:
selecting an available optical layer link path from the optical layer link paths according to the load information and the use attribute on the wavelength corresponding to the optical layer link path;
and determining the optical layer link required for transmitting the data packet from the available optical layer link path according to the link service priority matching information on the corresponding wavelength of the available optical layer link path.
The information such as the service priority corresponding to the data packet can be obtained according to the related information in the packet header of the data packet, so as to determine the optical layer link required for transmitting the data packet.
In practical application, the basic situation of each optical layer link path corresponding to a data packet obtained by presenting routing information of an IP layer link selected for the data packet and resource occupation information of each wavelength on the optical layer link in a table form includes: load information, matching information with the use attribute of the data packet, matching information of the service priority corresponding to the data packet, and the like. For example, assuming that the IP layer link route selected for the data packet is from node a to node B, and at this time, there may be 3 corresponding links in the optical layer according to the IP layer link route, the basic situation of each optical layer link path formed can be as shown in table 2.
TABLE 2
The best optical layer link is then selected according to the contents shown in table 2.
In an embodiment, the method may further comprise:
acquiring all routing related information of an IP layer link of the data packet;
and selecting one route from all the routes of the IP layer link as the IP layer link required for transmitting the data packet according to the resource occupation information of each route in the acquired related information of all the routes of the IP layer link.
Wherein, the obtaining of all the routing related information of the IP layer link of the data packet means: and acquiring all possible routes and corresponding resource occupation information of the IP layer link of the data packet.
Here, the resource occupation information may include: information on whether it has been filled with data packet resources, if not, which specific spaces are available, usage attributes, etc.
According to the related information in the packet header of the data packet, the information such as the source IP address and the destination IP address corresponding to the data packet can be obtained, so as to obtain all the routing related information of the IP layer link of the data packet.
The acquiring of all the routing related information of the IP layer link of the data packet specifically includes:
and acquiring all routing related information of the IP layer link of the data packet through interaction with the network equipment corresponding to the IP layer link.
In an embodiment, when an optical layer link required for transmitting a data packet is determined to be not suitable according to routing information of an IP layer link selected for the data packet and acquired resource occupation information of each wavelength on the optical layer link, a new route is selected from each route of the IP layer link as an IP layer link required for transmitting the data packet according to resource occupation information of each route in all acquired route related information of the IP layer link of the data packet;
and then, re-determining the optical layer link required for transmitting the data packet by using the routing information of the newly selected IP layer link and the acquired resource occupation information of each wavelength on the optical layer link.
Wherein said not applicable may be: and determining that the optical layer link required for transmitting the data packet does not meet a preset rule. Here, the preset rule may be: whether the link has resources to carry the service or whether the existing resources of the link can meet the service quality required by the service, and the like.
The specific implementation process of re-determining the optical layer link required for transmitting the data packet is described in detail above, and is not described in detail.
In practical application, the above process is performed for each data packet to be transmitted.
As can be seen from the above description, the basic idea of the transmission link control method provided by this embodiment is: acquiring resource occupation information of each wavelength on the optical layer link; all routing related information of an IP layer link of the data packet is obtained; and determining the IP layer link and the optical layer link required for transmitting the data packet according to the acquired resource occupation information of each route in all the route related information of the IP layer link and the acquired resource occupation information of each wavelength on the optical layer link. In other words, the method comprehensively considers the IP layer and the optical layer link, and is a control and deployment method for the data transmission link based on the IP layer address routing (IP layer resources) and the wavelength routing (optical layer resources). In practical application, the resources of the optical layer and the IP layer can be jointly allocated according to the application requirement, so that the dynamic allocation of the resources is realized, and the high-efficiency bandwidth resource utilization is realized.
The transmission link control method provided by the embodiment of the invention obtains the resource occupation information of each wavelength on the optical layer link; the optical layer link required for transmitting the data packet is determined from each optical layer link path corresponding to the data packet according to the routing information of the IP layer link selected for the data packet and the acquired resource occupation information of each wavelength on the optical layer link.
When an optical layer link required for transmitting a data packet is determined to be unsuitable according to routing information of an IP layer link selected for the data packet and acquired resource occupation information of each wavelength on the optical layer link, selecting a new route from all the routes of the IP layer link as the IP layer link required for transmitting the data packet according to the acquired resource occupation information of each route in all the route related information of the IP layer link of the data packet; and then, the optical layer link required for transmitting the data packet is determined again by utilizing the routing information of the newly selected IP layer link and the acquired resource occupation information of each wavelength on the optical layer link.
In addition, according to the load information and the use attribute on the wavelength corresponding to each optical layer link path, selecting an available optical layer link path from the optical layer link paths; and determining the optical layer link required for transmitting the data packet from the available optical layer link path according to the link Service priority matching information on the corresponding wavelength of the available optical layer link path, so that the Quality of Service (QoS) of the Service can be ensured.
Example two
To implement the method according to the embodiment of the present invention, the embodiment provides a transmission link control apparatus, as shown in fig. 2, the apparatus includes: a wavelength resource monitoring module 21 and a routing resource matching module 22; wherein the content of the first and second substances,
the wavelength resource monitoring module 21 is configured to acquire resource occupation information of each wavelength on an optical layer link of a transmission link;
the routing resource matching module 22 is configured to determine, according to routing information of an IP layer link selected for a data packet and acquired resource occupation information of each wavelength on the optical layer link, an optical layer link required for transmitting the data packet from each optical layer link path corresponding to the data packet.
Here, it should be noted that: the transmission link of the embodiment includes: optical layer links and IP layer links.
The obtained resource occupation information of each wavelength on the optical layer link refers to: in the SDN, all optical layer transmission devices (network devices corresponding to the entire optical layer link) form resource occupation information of each wavelength on the entire optical layer link.
The wavelength resource monitoring module 21 is specifically configured to: and acquiring resource occupation information of each wavelength on the optical layer link through interaction with network equipment corresponding to the optical layer link.
The acquired resource occupation information of each wavelength on the optical layer link may include: information on whether it has been filled with data packet resources, if not, which specific spaces are available, usage attributes, service priority, etc.
Wherein the usage attributes may include: whether to allow transmission of data packets, etc., the service priority refers to the quality of service level that the link can carry, such as: Premium/Gold, best effort, Unclassfied, etc.
In practical application, the acquired resource occupation information of each wavelength on the optical layer link can be presented in a form of a table, so that the resource occupation information of each wavelength, such as the content shown in table 1, can be clearly and intuitively seen.
In one embodiment, as shown in fig. 3, the routing resource matching module 22 may include: a first determination module 221, a second determination module 222, and a third determination module 223; wherein the content of the first and second substances,
the first determining module 221 is configured to obtain, by using the routing information and combining with a topology structure of a network, each optical layer link path corresponding to the data packet;
the second determining module 222 is configured to obtain resource usage information on a wavelength corresponding to each optical layer link path by using the obtained resource occupation information of each wavelength on the optical layer link;
the third determining module 223 is configured to determine, according to the resource usage information on the wavelength corresponding to each optical layer link path, an optical layer link required for transmitting the data packet.
Wherein the routing information may include: a source IP address, a destination IP address, and next hop information.
The second determining module 222 is specifically configured to: acquiring load information and use attributes on the wavelengths corresponding to the link paths of the optical layers by using the acquired spare resource information on the wavelengths; and obtaining link service priority matching information on the wavelength corresponding to each optical layer link path by using the obtained link service priority corresponding to each wavelength and the service priority corresponding to the data packet.
Accordingly, the third determining module 223 is specifically configured to: and determining the optical layer link required for transmitting the data packet according to the load information, the use attribute and the corresponding link service priority matching information on the wavelength corresponding to each optical layer link path.
More specifically, the third determining module 223 selects an available optical layer link path from the optical layer link paths according to the load information and the usage attribute on the wavelength corresponding to the optical layer link path;
the third determining module 223 determines the optical layer link required for transmitting the data packet from the available optical layer link path according to the link service priority matching information on the wavelength corresponding to the available optical layer link path.
The third determining module 223 may obtain information such as service priority corresponding to the data packet according to the related information in the packet header of the data packet, so as to determine the optical layer link required for transmitting the data packet according to the information.
In practical application, the basic situation of each optical layer link path corresponding to a data packet obtained by presenting routing information of an IP layer link selected for the data packet and resource occupation information of each wavelength on the optical layer link in a table form includes: load information, matching information with the use attribute of the data packet, matching information of the service priority corresponding to the data packet, and the like. For example, assuming that the IP layer link route selected for the data packet is from node a to node B, and at this time, there may be 3 corresponding links in the optical layer according to the IP layer link route, the basic situation of each optical layer link path formed can be as shown in table 2.
The third determining module 223 selects the best optical layer link according to the contents shown in table 2.
In one embodiment, as shown in fig. 4, the apparatus may further include: an IP layer link route related information obtaining module 23, configured to obtain all route related information of an IP layer link of a data packet;
correspondingly, the route resource matching module 22 is further configured to select one route from the routes of the IP layer link as the IP layer link required for transmitting the data packet according to the resource occupation information of each route in the acquired relevant information of all routes of the IP layer link.
Wherein, the obtaining of all the routing related information of the IP layer link of the data packet means: and acquiring all possible routes and corresponding resource occupation information of the IP layer link of the data packet.
Here, the resource occupation information may include: information on whether it has been filled with data packet resources, if not, which specific spaces are available, usage attributes, etc.
The IP layer link route related information obtaining module 23 may obtain information such as a source IP address and a destination IP address corresponding to the data packet according to related information in the packet header of the data packet, so as to obtain all route related information of the IP layer link of the data packet.
The IP layer link route related information obtaining module 23 is specifically configured to: and acquiring all routing related information of the IP layer link of the data packet through interaction with the network equipment corresponding to the IP layer link.
In an embodiment, when the optical layer link required for transmitting the data packet is determined to be not suitable according to the routing information of the IP layer link selected for the data packet and the acquired resource occupation information of each wavelength on the optical layer link, the routing resource matching module 22 selects a new route from the routes of the IP layer link as the IP layer link required for transmitting the data packet according to the resource occupation information of each route in the acquired information related to all the routes of the IP layer link of the data packet; and then, re-determining the optical layer link required for transmitting the data packet by using the routing information of the newly selected IP layer link and the acquired resource occupation information of each wavelength on the optical layer link.
Wherein said not applicable may be: and determining that the optical layer link required for transmitting the data packet does not meet a preset rule. Here, the preset rule may be: whether the link has resources to carry the service or whether the existing resources of the link can meet the service quality required by the service, and the like.
The specific implementation process of re-determining the optical layer link required for transmitting the data packet is described in detail above, and is not described in detail.
In practical application, the above process is performed for each data packet to be transmitted.
In practical applications, as shown in fig. 5, the apparatus may be located in an SDN controller, which is a centralized and unified SDN controller, and connects network devices in an IP layer and an optical layer. The route identifier of the IP layer is an IP address, and the route control of the optical layer is mainly wavelength and the like. The SDN controller respectively generates a flow table for each layer and performs resource association of the flow tables in each layer according to the global topology; meanwhile, the SDN controller may dynamically allocate resources in each layer of flow table according to application requirements, that is, by jointly allocating optical layer and IP layer resources, efficient bandwidth resource utilization may be finally facilitated.
In practical application, the wavelength resource monitoring module 21 and the IP layer link route related information obtaining module 23 may be implemented by a Central Processing Unit (CPU), a Microprocessor (MCU), a Digital Signal Processor (DSP), or a Programmable logic Array (FPGA) in the transmission link Control device in combination with a communication chip; the first determining module 221, the second determining module 222 and the third determining module 223 of the routing resource matching module 22 may be implemented by a CPU, an MCU, a DSP or an FPGA in the transmission link control device.
As can be seen from the above description, the basic idea of the transmission link control method provided by this embodiment is: acquiring resource occupation information of each wavelength on the optical layer link; all routing related information of an IP layer link of the data packet is obtained; and determining the IP layer link and the optical layer link required for transmitting the data packet according to the acquired resource occupation information of each route in all the route related information of the IP layer link and the acquired resource occupation information of each wavelength on the optical layer link. In other words, the method comprehensively considers the IP layer and the optical layer link, and is a control and deployment method for the data transmission link based on the IP layer address routing (IP layer resources) and the wavelength routing (optical layer resources). In practical application, the resources of the optical layer and the IP layer can be jointly allocated according to the application requirement, so that the dynamic allocation of the resources is realized, and the high-efficiency bandwidth resource utilization is realized.
In the transmission link control device provided in the embodiment of the present invention, the wavelength resource monitoring module 21 obtains resource occupation information of each wavelength on the optical layer link; the routing resource matching module 22 determines the optical layer link required for transmitting the data packet from each optical layer link path corresponding to the data packet according to the routing information of the IP layer link selected for the data packet and the acquired resource occupation information of each wavelength on the optical layer link, and since the optical layer link is jointly allocated based on the IP layer and the optical layer resources, that is, the optical layer and the IP layer are uniformly controlled, the cost of the link and the equipment can be effectively reduced on the premise of ensuring the reliability of data transmission.
When the optical layer link required for transmitting the data packet is determined to be unsuitable according to the routing information of the IP layer link selected for the data packet and the acquired resource occupation information of each wavelength on the optical layer link, the routing resource matching module 22 selects a new route from each route of the IP layer link as the IP layer link required for transmitting the data packet according to the resource occupation information of each route in the acquired information related to all the routes of the IP layer link of the data packet; and then, the optical layer link required for transmitting the data packet is determined again by utilizing the routing information of the newly selected IP layer link and the acquired resource occupation information of each wavelength on the optical layer link.
In addition, the third determining module 223 selects an available optical layer link path from the optical layer link paths according to the load information and the usage attribute on the wavelength corresponding to the optical layer link path; and determining the optical layer link required for transmitting the data packet from the available optical layer link path according to the link service priority matching information on the corresponding wavelength of the available optical layer link path, so that the QoS of the service can be ensured.
EXAMPLE III
On the basis of the first and second embodiments, the present embodiment describes how to implement the control of the transmission link by using a specific example.
In this embodiment, it is assumed that the IP network is a three-node IP network, and there are also three-node Optical Add-drop multiplexer (OADM) devices in the Optical network. Specifically, as shown in fig. 6: in the IP layer, three routers A1, B1 and C1 are logically formed into a three-node IP network, namely the connection among the routers A1, B1 and C1 is logical connection; the optical layer has three single wavelength (λ 1, λ 2, λ 3) connected OADM devices of optical node A, B, C physically forming a three-node optical network, i.e. the connection between optical nodes A, B, C is a physical connection. Where router a1 is connected to optical node a and router C1 is connected to optical node C. The IP packet sent through router a1 to router C1 (the next hop address is the address of router C1) can be carried by the λ 1 wavelength carried in the optical layer from optical node a to optical node C. That is, the optical layer link resource path of the data packet determined by the routing resource matching module of the transmission link control device at this time is: λ 1 (optical node a-optical node C).
In the process of transmitting a data packet, it is assumed that a link between the optical node a and the optical node C fails, or resources on the link wavelength λ 1 are already occupied, as shown in fig. 7. To solve this problem, the prior art solves this problem by: for the case of link failure, it is common to use protection & restoration (protection & restoration) mechanism to make 1:1(N) fiber resource reservation, and when the link fails, make a reserved link switch to let the data packet continue to be transmitted. For the resource-filled case at wavelength λ 1, it is common to add new wavelength (λ) resources on the links from optical node a to optical node C, and this solution usually requires the addition of new tunable laser devices.
By adopting the architecture and the method provided by the embodiment of the invention, the wavelength resource monitoring module of the transmission link control device obtains the resource occupation information of each wavelength on the optical layer link through the interaction with the optical node A, the optical node B and the optical node C; the resource matching module obtains the basic conditions of each optical layer link path as shown in table 2 according to the obtained resource occupation information of each wavelength on the optical layer link and the IP routing information of the data packet; when determining that resources on a wavelength λ 1 are already occupied or a link between an optical node a and an optical node C fails according to a basic situation of each optical layer link path, re-determining an optical layer link for transmission for a data packet according to the basic situation of each optical layer link path, that is, determining the optical layer link as: λ 2 (optical node a-optical node B) + λ 3 (optical node B-optical node C). After the optical layer links are determined, as shown in figure 7,
the data packet is switched from λ 1 to λ 2 (optical node a-optical node B) + λ 3 (optical node B-optical node C) for transmission, so that link protection or capacity scheduling based on SDN unified control is realized.
As can be seen from the above description, the prior art solutions add significantly to the overhead and cost of the network device. By adopting the framework and the method provided by the embodiment of the invention, additional links and equipment are not needed, and the cost of the links and the equipment can be effectively avoided.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of a hardware embodiment, a software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (15)
1. A method for controlling a transmission link, wherein the transmission link includes an optical layer link and an internet protocol, IP, layer link, the method comprising:
acquiring resource occupation information of each wavelength on the optical layer link;
determining an optical layer link required for transmitting a data packet from each optical layer link path corresponding to the data packet according to routing information of an IP layer link selected for the data packet and acquired resource occupation information of each wavelength on the optical layer link; wherein the content of the first and second substances,
the determining, according to the routing information of the IP layer link selected for the data packet and the acquired resource occupation information of each wavelength on the optical layer link, an optical layer link required for transmitting the data packet from each optical layer link path corresponding to the data packet includes:
obtaining each optical layer link path corresponding to the data packet by using the routing information and combining a network topology structure;
acquiring resource use information on the wavelength corresponding to each optical layer link path by using the acquired resource occupation information of each wavelength on the optical layer link;
and determining the optical layer link required for transmitting the data packet according to the resource use information on the wavelength corresponding to each optical layer link path.
2. The method according to claim 1, wherein the obtaining resource usage information on the wavelength corresponding to each optical layer link path by using the obtained resource occupancy information includes:
acquiring load information and use attributes on the wavelengths corresponding to the link paths of the optical layers by using the acquired spare resource information on the wavelengths;
and obtaining link service priority matching information on the wavelength corresponding to each optical layer link path by using the obtained link service priority corresponding to each wavelength and the service priority corresponding to the data packet.
3. The method according to claim 2, wherein the determining the optical layer link required for transmitting the data packet according to the resource usage information on the wavelength corresponding to each optical layer link path comprises:
and determining the optical layer link required for transmitting the data packet according to the load information, the use attribute and the corresponding link service priority matching information on the wavelength corresponding to each optical layer link path.
4. The method according to claim 3, wherein the determining, according to the load information on the wavelength corresponding to each optical layer link path and the corresponding link service priority matching information, the optical layer link required for transmitting the data packet is:
selecting an available optical layer link path from the optical layer link paths according to the load information and the use attribute on the wavelength corresponding to the optical layer link path;
and determining the optical layer link required for transmitting the data packet from the available optical layer link path according to the link service priority matching information on the corresponding wavelength of the available optical layer link path.
5. The method according to any one of claims 1 to 4, further comprising:
acquiring all routing related information of an IP layer link of the data packet;
and selecting one route from all the routes of the IP layer link as the IP layer link required for transmitting the data packet according to the resource occupation information of each route in the acquired related information of all the routes of the IP layer link.
6. The method of claim 5, further comprising:
when an optical layer link required for transmitting a data packet is determined to be unsuitable according to routing information of an IP layer link selected for the data packet and acquired resource occupation information of each wavelength on the optical layer link, selecting a new route from all the routes of the IP layer link as the IP layer link required for transmitting the data packet according to the acquired resource occupation information of each route in all the route related information of the IP layer link of the data packet;
and re-determining the optical layer link required for transmitting the data packet by utilizing the routing information of the newly selected IP layer link and the acquired resource occupation information of each wavelength on the optical layer link.
7. The method according to claim 1, wherein the obtaining the resource occupancy information of each wavelength on the optical layer link is:
and acquiring resource occupation information of each wavelength on the optical layer link through interaction with network equipment corresponding to the optical layer link.
8. The method according to claim 1, wherein the obtaining of all routing related information of the IP layer link of the packet is:
and acquiring all routing related information of the IP layer link of the data packet through interaction with the network equipment corresponding to the IP layer link.
9. A transmission link control device is characterized in that the transmission link comprises an optical layer link and an IP layer link; the device comprises: a wavelength resource monitoring module and a routing resource matching module; wherein the content of the first and second substances,
the wavelength resource monitoring module is used for acquiring resource occupation information of each wavelength on an optical layer link of the transmission link;
the routing resource matching module is configured to determine, from each optical layer link path corresponding to the data packet, an optical layer link required for transmitting the data packet according to routing information of an IP layer link selected for the data packet and acquired resource occupation information of each wavelength on the optical layer link;
the routing resource matching module comprises: the device comprises a first determining module, a second determining module and a third determining module; wherein the content of the first and second substances,
the first determining module is configured to obtain, by using the routing information and in combination with a topology structure of the network, each optical layer link path corresponding to the data packet;
the second determining module is configured to obtain resource usage information on wavelengths corresponding to optical layer link paths by using the obtained resource occupancy information of each wavelength on the optical layer link;
and the third determining module is configured to determine, according to the resource usage information on the wavelength corresponding to each optical layer link path, an optical layer link required for transmitting the data packet.
10. The apparatus of claim 9, wherein the second determining module is specifically configured to: acquiring load information and use attributes on the wavelengths corresponding to the link paths of the optical layers by using the acquired spare resource information on the wavelengths; and obtaining link service priority matching information on the wavelength corresponding to each optical layer link path by using the obtained link service priority corresponding to each wavelength and the service priority corresponding to the data packet.
11. The apparatus of claim 10, wherein the third determining module is specifically configured to: and determining the optical layer link required for transmitting the data packet according to the load information, the use attribute and the corresponding link service priority matching information on the wavelength corresponding to each optical layer link path.
12. The apparatus of claim 9, further comprising: the IP layer link route related information acquisition module is used for acquiring all route related information of the IP layer link of the data packet;
correspondingly, the route resource matching module is further configured to select one route from the routes of the IP layer link as the IP layer link required for transmitting the data packet according to the resource occupation information of each route in the acquired relevant information of all routes of the IP layer link.
13. The apparatus according to claim 9, wherein the wavelength resource monitoring module is specifically configured to:
and acquiring resource occupation information of each wavelength on the optical layer link through interaction with network equipment corresponding to the optical layer link.
14. The apparatus according to claim 12, wherein the IP layer link routing related information obtaining module is specifically configured to: and acquiring all routing related information of the IP layer link of the data packet through interaction with the network equipment corresponding to the IP layer link.
15. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510493366.1A CN106453145B (en) | 2015-08-12 | 2015-08-12 | Transmission link control method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510493366.1A CN106453145B (en) | 2015-08-12 | 2015-08-12 | Transmission link control method and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106453145A CN106453145A (en) | 2017-02-22 |
| CN106453145B true CN106453145B (en) | 2020-02-18 |
Family
ID=58092550
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510493366.1A Active CN106453145B (en) | 2015-08-12 | 2015-08-12 | Transmission link control method and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106453145B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113099321B (en) * | 2019-12-23 | 2022-09-30 | 中国电信股份有限公司 | Method, device and computer readable storage medium for determining communication path |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102136940A (en) * | 2010-12-31 | 2011-07-27 | 华为技术有限公司 | Network recovery method and device |
| CN103812778A (en) * | 2014-02-21 | 2014-05-21 | 华为技术有限公司 | Stream table entry generating method and device |
| CN104539445A (en) * | 2014-12-01 | 2015-04-22 | 北京百度网讯科技有限公司 | Method and device for managing service resources |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7346277B2 (en) * | 2003-09-08 | 2008-03-18 | Lucent Technologies Inc. | Joint-layer restoration in packet-over-optical networks |
-
2015
- 2015-08-12 CN CN201510493366.1A patent/CN106453145B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102136940A (en) * | 2010-12-31 | 2011-07-27 | 华为技术有限公司 | Network recovery method and device |
| CN103812778A (en) * | 2014-02-21 | 2014-05-21 | 华为技术有限公司 | Stream table entry generating method and device |
| CN104539445A (en) * | 2014-12-01 | 2015-04-22 | 北京百度网讯科技有限公司 | Method and device for managing service resources |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106453145A (en) | 2017-02-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10250459B2 (en) | Bandwidth on-demand services in multiple layer networks | |
| CN111149330B (en) | Topology aware controller association in software defined networks | |
| US9197569B2 (en) | Hierarchical control in software-defined network (SDN) | |
| US10411989B2 (en) | Compiler for and method of software defined networking, storage and compute determining physical and virtual resources | |
| EP2822241B1 (en) | Packet switching resource allocation method and device | |
| US9584369B2 (en) | Methods of representing software defined networking-based multiple layer network topology views | |
| EP3016316B1 (en) | Network control method and apparatus | |
| US20180145926A1 (en) | Flexible and scalable enhanced transmission selection method for network fabrics | |
| US8462636B2 (en) | Systems and methods for communication of management traffic over link aggregation group interface for a network element with distributed architecture | |
| US10374935B2 (en) | Link discovery method, system, and device | |
| EP2712480A1 (en) | Cloud service control and management architecture expanded to interface the network stratum | |
| CN110855542B (en) | Management method, system and device for transmission network slice | |
| EP3253012B1 (en) | Method and apparatus for obtaining port path | |
| US20120281529A1 (en) | Bandwidth Advertisement Model for Shared Mesh Protection | |
| US10003522B2 (en) | Routing with flow over shared risk link groups | |
| JP2009267625A (en) | Virtual network system and virtual network construction method | |
| JP5364183B2 (en) | Network resource management device | |
| CN105960792B (en) | The method and apparatus that information centre's network flow is mapped to light stream | |
| JP2009055357A (en) | Node device, communications network, path setting method and program | |
| CN106453145B (en) | Transmission link control method and device | |
| CN113973381A (en) | Resource management method and device for flexible Ethernet Flexe | |
| US10862795B2 (en) | Provisioning recovery paths in a mesh network | |
| CN106330701B (en) | Rapid rerouting method and device for ring network | |
| EP3725044B1 (en) | Actn virtual network augmentation for resource sharing | |
| WO2016095610A1 (en) | Method and system for restoring optical layer service |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |