WO2021052241A1

WO2021052241A1 - Address acquisition method and related device

Info

Publication number: WO2021052241A1
Application number: PCT/CN2020/114552
Authority: WO
Inventors: 赵阳; 李允博; 张德朝; 王东; 李晗
Original assignee: 中国移动通信有限公司研究院; 中国移动通信集团有限公司
Priority date: 2019-09-20
Filing date: 2020-09-10
Publication date: 2021-03-25
Also published as: CN112543386B; CN112543386A

Abstract

Disclosed are an address acquisition method and a related device. The method comprises: a first client optical transport network (OTN) device sending a request message to a management and control system by means of a first OTN local end device, wherein the request message reaching the management and control system comprises information of a first address of the first client OTN device and information of a second address of the first OTN local end device; and the first client OTN device obtaining, by means of the first OTN local end device, a response message sent by the management and control system, wherein the response message comprises information of a third address of the management and control system and information of a fourth address allocated by the management and control system to the first client OTN device.

Description

Method for obtaining address and related equipment

Cross-references to related applications

This application is filed based on a Chinese patent application whose application number is 201910894845.2, and the filing date is September 20, 2019, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby incorporated into this application by way of introduction.

Technical field

The present disclosure relates to the technical field of optical transport networks, and in particular to an address acquisition method and related equipment.

Background technique

Client Optical Transport Network (OTN, Optical Transport Network) equipment (also called CPE OTN equipment), as a client-side equipment, needs to have a good plug-and-play function (that is, automatically obtain the IP address of the management and control system after power-on to achieve Interoperability of control messages) to improve user experience.

At present, some manufacturers can realize that CPE OTN equipment automatically obtains the IP address of the management and control system, but the industry does not have a unified implementation plan. This results in the scenario where the CPE OTN equipment is connected to the OTN of a different manufacturer’s metropolitan area, the CPE OTN equipment must manually configure parameters such as the IP address of the management and control system before it can be connected to the management and control system. Therefore, there is currently no effective solution for how to realize the automatic acquisition of the IP address of the management and control equipment in the case of a network of different manufacturers.

Summary of the invention

The embodiment of the present application expects to provide an address obtaining method and related equipment.

The technical solutions of the embodiments of the present application are implemented as follows:

In the first aspect, an embodiment of the present application provides an address acquisition method, the method includes: a first client OTN device sends a request message to a management and control system through the first OTN central office device; a request message arriving at the management and control system The text includes the first address information of the first client OTN device and the second address information of the first OTN central office device; the first client OTN device obtains all information through the first OTN central office device The response message sent by the management and control system, where the response message includes the third address information of the management and control system and the fourth address information allocated by the management and control system to the first client OTN device.

In some optional embodiments of the present application, the first client OTN device sends a request message to the management and control system through the first OTN central office device, including: the first client OTN device sends the first client OTN device by broadcast. A request message; the first request message includes the first address information of the first client OTN device; the first request message is received by the first OTN central office device, in the The first request message is added with the second address information to generate and send a second request message to the management and control system.

In some optional embodiments of the present application, the method further includes: the first client OTN device accesses the first OTN central office device to generate an address routing table; the address routing table is used to indicate the report The text is transmitted from the first client OTN device to the transmission path of the management and control system.

In some optional embodiments of the present application, the request message and the response message are Dynamic Host Configuration Protocol (DHCP, Dynamic Host Configuration Protocol) messages; the DHCP message includes a first specific field and a first specific field. Two specific fields and a third specific field; the first specific field is used to add the first address information and the fourth address information, the second specific field is used to add the second address information, the The third specific field is used to add the third address information.

In a second aspect, an embodiment of the present application also provides an address obtaining method, the method includes: the management and control system obtains the request message sent by the first client OTN device through the first OTN central office device; in the request message Including the first address information of the first client OTN device and the second address information of the first OTN central office device; the management and control system communicates to the first client OTN through the first OTN central office device The device sends a response message, and the response message includes the third address information of the management and control system and the fourth address information allocated by the management and control system to the first client OTN device.

In some optional embodiments of the present application, the management and control system obtains the request message sent by the first client OTN device through the first OTN central office device, including: the management and control system obtains the first OTN device through unicast. A second request message sent by an OTN central office device; the second request message is that after the first OTN central office device obtains the first request message sent by the first client OTN device, The first request message is generated by adding the second address information; the first request message includes the first address information of the first client OTN device.

In some optional embodiments of the present application, before the management and control system obtains the request message sent by the first client OTN device through the first OTN central office device, the method further includes: the management and control system obtains the subnet configuration Information, the subnet configuration information includes multiple sets of subnet information, corresponding OTN central office equipment, and multiple address information; the subnet information and the OTN central office equipment have a one-to-one correspondence; the multiple address information It is the address information corresponding to the subnet information that can be allocated to the client OTN device.

In some optional embodiments of the present application, before the management and control system sends a response message to the first client OTN device through the first OTN central office device, the method further includes: the management and control system is based on The second address information in the request message queries the subnet configuration information, determines the subnet information corresponding to the first client OTN device, and selects from multiple address information corresponding to the subnet information One piece of address information serves as the fourth address information.

In some optional embodiments of the present application, the request message and the response message are DHCP messages; the DHCP message includes a first specific field, a second specific field, and a third specific field; The first specific field is used to add the first address information and the fourth address information, the second specific field is used to add the second address information, and the third specific field is used to add the third address information. Address information.

In a third aspect, an embodiment of the present application also provides an address acquisition method, the method includes: the first OTN central office device forwards a request message sent by the first client OTN device to the management and control system; The request message includes the first address information of the first client OTN device and the second address information of the first OTN central office device; the first OTN central office device forwards the management and control system to the A response message of the first client OTN device; the response message includes the third address information of the management and control system and the fourth address information allocated by the management and control system to the first client OTN device.

In some optional embodiments of the present application, the forwarding of the request message sent by the first client OTN device to the management and control system by the first OTN central office device includes: the first OTN central office device obtains the first The first request message sent by the client OTN device by broadcasting; the first request message includes the first address information of the first client OTN device; the first OTN central office device is in the Adding the second address information to the first request message generates a second request message, and sends the second request message to the management and control system in a unicast manner.

In some optional embodiments of the present application, the method further includes: the first OTN central office device obtains routing configuration information; the routing configuration information is used to instruct the message to be transmitted from the management and control system to the client OTN The transmission path of the device; the first OTN central office device forwards the request message sent by the first client OTN device to the management and control system, including: the first OTN central office device forwards the first client OTN device based on the routing configuration information Request message sent to the management and control system.

In a fourth aspect, the embodiments of the present application also provide a client OTN device, where the client OTN device is a first client OTN device; the device includes: a first sending unit and a first receiving unit; The first sending unit is configured to send a request message to the management and control system through a first OTN central office device; the request message arriving at the management and control system includes the first address information of the first client OTN device and the The second address information of the first OTN central office device;

The first receiving unit is configured to obtain a response message sent by the management and control system through the first OTN central office device, and the response message includes the third address information of the management and control system and the management and control system Fourth address information allocated to the first client OTN device.

In some optional embodiments of the present application, the first sending unit is configured to send the first request message by broadcasting; the first request message includes the first client OTN device An address information; the first request message is received by the first OTN central office device, and the second address information is added to the first request message to generate and send a second request to the management and control system Message.

In some optional embodiments of the present application, the device further includes a generating unit configured to access the first OTN central office device to generate an address routing table; the address routing table is used to indicate that packets are sent by the The first client OTN device is transmitted to the transmission path of the management and control system.

In a fifth aspect, an embodiment of the present application also provides a management and control system, the management and control system includes: a second receiving unit and a second sending unit; wherein, the second receiving unit is configured to pass through the first OTN central office equipment Obtain a request message sent by the first client OTN device; the request message includes the first address information of the first client OTN device and the second address information of the first OTN central office device;

The second sending unit is configured to send a response message to the first client OTN device through the first OTN central office device, and the response message includes the third address information of the management and control system and the The fourth address information allocated by the management and control system to the first client OTN device.

In some optional embodiments of the present application, the second receiving unit is configured to obtain the second request message sent by the first OTN central office device in a unicast manner; the second request message is After the first OTN central office device obtains the first request message sent by the first client OTN device, it is generated by adding the second address information to the first request message; the first request The message includes the first address information of the first client OTN device.

In some optional embodiments of the present application, the management and control system further includes an obtaining unit configured to obtain subnet configuration information. The subnet configuration information includes multiple sets of subnet information, corresponding OTN central office equipment, and multiple subnets. One piece of address information; the subnet information and the OTN central office device have a one-to-one correspondence; the multiple pieces of address information are address information corresponding to the subnet information and that can be allocated to the client OTN device.

In some optional embodiments of the present application, the management and control system further includes a determining unit configured to send a response message to the first client OTN device by the second sending unit through the first OTN central office device Previously, the subnet configuration information was queried based on the second address information in the request message, and the subnet information corresponding to the first client OTN device was determined, from the multiple addresses corresponding to the subnet information One address information is selected as the fourth address information in the information.

In a sixth aspect, the embodiments of the present application also provide an OTN central office equipment, the OTN central office equipment is a first OTN central office equipment; the equipment includes: a first communication unit and a second communication unit; wherein,

The first communication unit is configured to obtain a request message sent by a first client OTN device; and is also configured to forward a response message sent by the management and control system to the first client OTN device;

The second communication unit is configured to forward the request message to the management and control system; and is also configured to obtain a response message sent by the management and control system;

Wherein, the request message arriving at the management and control system includes the first address information of the first client OTN device and the second address information of the first OTN central office device; the response message includes the The third address information of the management and control system and the fourth address information allocated by the management and control system to the first client OTN device.

In some optional embodiments of the present application, the device further includes a processing unit;

The first communication unit is configured to obtain a first request message sent by the first client OTN device by broadcasting; the first request message includes the first request message of the first client OTN device Address information;

The processing unit is configured to add the second address information to the first request message to generate a second request message;

The second communication unit is configured to send the second request message to the management and control system in a unicast manner.

In some optional embodiments of the present application, the device further includes an obtaining unit configured to obtain routing configuration information; the routing configuration information is used to indicate the transmission path of the packet from the management and control system to the client OTN device ；

The second communication unit is configured to forward a request message sent by the first client OTN device to the management and control system based on the routing configuration information obtained by the obtaining unit.

In a seventh aspect, the embodiments of the present application also provide a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the foregoing first, second, or third aspects of the embodiments of the present application are implemented The steps of the address obtaining method.

The embodiment of the present application also provides a communication device, including a memory, a processor, and a computer program stored in the memory and capable of running on the processor. When the processor executes the program, the foregoing first embodiment of the embodiment of the present application is implemented. Aspect, the steps of the address acquisition method described in the second aspect or the third aspect.

The address acquisition method and related equipment provided by the embodiments of the present application include: the first client OTN device sends a request message to the management and control system through the first OTN central office device; the request message arriving at the management and control system includes The first address information of the first client OTN device and the second address information of the first OTN central office device; the first client OTN device obtains the management and control system through the first OTN central office device A sent response message, the response message including the third address information of the management and control system and the fourth address information allocated by the management and control system to the first client OTN device. By adopting the technical solution of the embodiment of the present application, the first OTN central office device forwards the message, without the client OTN device manually configuring the IP address and other parameters of the management and control system, and the client OTN device automatically obtains the IP address of the management and control system. , Thus realizing the automatic docking between the client OTN equipment and the management and control system, on the other hand, it also greatly improves the user experience.

Description of the drawings

FIG. 1 is a schematic diagram of a system architecture applied by an address obtaining method according to an embodiment of the application;

FIG. 2 is a first flowchart of the method for obtaining an address according to an embodiment of this application;

FIG. 3 is a second flowchart of the method for obtaining an address according to an embodiment of this application;

FIG. 4 is a third flowchart of the method for obtaining an address according to an embodiment of this application;

FIG. 5 is a fourth flowchart of the method for obtaining an address according to an embodiment of this application;

FIG. 6 is a schematic diagram of a composition structure of a client OTN device according to an embodiment of the application;

FIG. 7 is a schematic diagram of another composition structure of a client OTN device according to an embodiment of the application;

FIG. 8 is a schematic diagram 1 of the composition structure of a management and control system according to an embodiment of the application;

FIG. 9 is a second schematic diagram of the composition structure of the management and control system according to an embodiment of the application;

FIG. 10 is a third schematic diagram of the composition structure of the management and control system according to an embodiment of the application;

11 is a schematic diagram 1 of the composition structure of the OTN central office equipment according to an embodiment of the application;

FIG. 12 is a second schematic diagram of the composition structure of the OTN central office equipment according to an embodiment of the application;

FIG. 13 is a third schematic diagram of the composition structure of the OTN central office equipment according to an embodiment of the application;

FIG. 14 is a schematic diagram of the hardware composition structure of a communication device according to an embodiment of the application.

detailed description

The application will be further described in detail below in conjunction with the drawings and specific embodiments.

Figure 1 is a schematic diagram of the system architecture of the application of the address acquisition method according to the embodiment of the application; as shown in Figure 1, the system includes: a management and control system, a central office device located in an internal data communication network (DCN, Data Communication Network), and a client OTN equipment. Among them, the internal DCN also has a gateway, and the gateway performs data communication with the management and control system through the external DCN.

Among them, client OTN equipment, which can also be called CPE OTN equipment, refers to OTN equipment mainly deployed below the metropolitan area network\local network integrated service access node, which is directly connected to various group private line customer equipment, and is mainly placed in the customer The central office at the computer room or edge is connected to the office. The equipment mainly provides access and bearer for larger bandwidth services of 100Mbit/s and above, and also takes into account the access of small particle services below 100Mbit/s (such as E1, etc.) under special requirements. The CPE OTN equipment can be connected to the OTN equipment of the central office’s integrated service access node (that is, the OTN equipment in the DCN intranet) through the OTN interface in the standard format on the line side. The inter-domain interface (IrDI, Inter-Domain Interface) is used for the docking of transmission equipment of different manufacturers, which can realize the convergence, integration and smoothing of access services.

The address acquisition method in this embodiment can be implemented based on DHCP. The management and control system integrates a DHCP server function, has an IP address planning capability, and can allocate an IP address to a client OTN device based on a certain strategy.

In this embodiment, some of the OTN devices located in the internal DCN can be used as central office equipment, and the central office equipment has a DHCP relay (DHCP Relay) function; the DHCP relay function can be implemented in the main control board of the device. The client OTN device, as a DHCP Client, is configured with a default IP address when it leaves the factory. Client OTN equipment and central office equipment can communicate with each other.

In this embodiment, in the network planning stage, the closest OTN device connected to the client OTN device that can communicate with the management and control system and located in the internal DCN can be used as a central office device (also called a DHCP relay). The client OTN equipment and the central office equipment can be directly connected via optical fiber, and there can also be other equipment between the client OTN equipment and the central office equipment.

Based on the system architecture example shown in FIG. 1, the following embodiments of the present application are proposed.

The embodiment of the present application provides a method for obtaining an address. Fig. 2 is a schematic diagram 1 of the flow of an address obtaining method according to an embodiment of this application; as shown in Fig. 2, the method includes:

Step 101: The first client OTN device sends a request message to the management and control system through the first OTN central office device; the request message arriving at the management and control system includes the first address information of the first client OTN device and the address information. The second address information of the first OTN central office device;

Step 102: The first client OTN device obtains a response message sent by the management and control system through the first OTN central office device, and the response message includes the third address information of the management and control system and the Fourth address information allocated by the management and control system to the first client OTN device.

In this embodiment, the first client OTN device may be any client OTN device in FIG. 1. The technical solution of this embodiment is suitable for obtaining the address information of the management and control system through the forwarding of the OTN central office equipment before the first client OTN equipment accesses the OTN central office equipment.

In this embodiment, the first OTN central office device may be the central office device closest to the first client OTN device in the internal network DCN.

In an optional embodiment of the present application, the first client OTN device sends a request message to the management and control system through the first OTN central office device, including: the first client OTN device sends the request message by broadcast The first request message; the first request message includes the first address information of the first client OTN device; the first request message is received by the first OTN central office device, and the The first request message is added with the second address information to generate and send a second request message to the management and control system.

In this embodiment, the first client OTN device sends the first request message in a broadcast manner; the OTN central office device that receives the first request message may serve as the first OTN central office device. Wherein, the first client OTN device adds the first address information of the first client OTN device to the first request message, and the first address information may be in the first client OTN device The default IP address configured at the factory.

After the first OTN central office device receives the first request message, it adds the second address information of the first OTN central office device to the first request message to generate a second request message, which is transmitted through unicast Sending the second request message to the management and control system. The advantage of setting the OTN central office equipment is that if the OTN central office equipment is not set, the message still needs to be broadcast in the DCN, which will greatly increase the pressure on the network; and the OTN central office equipment can be unicast (Ie point-to-point transmission) way to transmit messages, can greatly reduce the network pressure.

In this embodiment, after obtaining the request message of the first client OTN device, the management and control system sends a response message to the first client OTN device, and the response message includes the third address information of the management and control system And fourth address information allocated by the management and control system to the first client OTN device.

In this embodiment, the client OTN device (for example, the first client OTN device) and the OTN device (which may include OTN central office equipment) in the DCN intranet can be OTN devices manufactured by the same manufacturer, or they can be manufactured by different manufacturers. OTN equipment.

Optionally, the address information (including the first address information, the second address information, the third address information, and the fourth address information) described in this embodiment may all be IP addresses.

Based on this, this embodiment uses the first OTN central office device to forward the message, without the client OTN device manually configuring the IP address of the management and control system and other parameters, and realizes that the client OTN device automatically obtains the IP address of the management and control system. The automatic connection between the client OTN equipment and the management and control system has also greatly improved the user experience on the other hand.

In an optional embodiment of the present application, the method further includes: the first client OTN device accesses the first OTN central office device to generate an address routing table; the address routing table is used to indicate The message is transmitted from the first client OTN device to the transmission path of the management and control system.

In this embodiment, after the first client OTN device obtains the response message of the management and control system, it accesses the management and control system based on the obtained third address information and fourth address information, thereby realizing the access of the first client OTN device The first OTN central office device generates an address routing table.

Based on the foregoing embodiment, the embodiment of the present application also provides an address obtaining method. Fig. 3 is a second flowchart of the method for obtaining an address according to an embodiment of this application; as shown in Fig. 3, the method includes:

Step 201: The management and control system obtains the request message sent by the first client OTN device through the first OTN central office device; the request message includes the first address information of the first client OTN device and the first The second address information of the OTN central office equipment;

Step 202: The management and control system sends a response message to the first client OTN device through the first OTN central office device, and the response message includes the third address information of the management and control system and the management and control The fourth address information allocated by the system to the first client OTN device.

In an optional embodiment of the present application, the management and control system obtains the request message sent by the first client OTN device through the first OTN central office device, including: the management and control system obtains the request message by unicast The second request message sent by the first OTN central office device; the second request message is that after the first OTN central office device obtains the first request message sent by the first client OTN device, The first request message is generated by adding the second address information; the first request message includes the first address information of the first client OTN device.

In this embodiment, the first client OTN device sends the first request message in a broadcast manner; the OTN central office device that receives the first request message may serve as the first OTN central office device. Wherein, the first client OTN device adds the first address information of the first client OTN device to the first request message, and the first address information may be in the first client OTN device The default IP address configured at the factory. After the first OTN central office device receives the first request message, it adds the second address information of the first OTN central office device to the first request message to generate a second request message, which is transmitted through unicast Sending the second request message to the management and control system.

In an optional embodiment of the present application, before the management and control system obtains the request message sent by the first client OTN device through the first OTN central office device, the method further includes: the management and control system obtains the subnet Configuration information, the subnet configuration information includes multiple sets of subnet information, corresponding OTN central office equipment, and multiple address information; the subnet information and the OTN central office equipment have a one-to-one correspondence; the multiple addresses The information is address information that corresponds to the subnet information and can be allocated to the client OTN device.

In this embodiment, in the network deployment stage, the OTN central office equipment is first planned. For example, the OTN central office equipment can be deployed according to the location (or estimated location) of the client OTN equipment. Among them, the OTN central office equipment can be deployed in a close area where the client OTN equipment is installed. In this embodiment, different subnets are configured for each OTN central office device, and different OTN central office devices correspond to different subnets. For example, the two OTN central office devices shown in Figure 1 can correspond to different subnets respectively.

In this embodiment, subnet configuration information is stored in the management and control system, and the subnet configuration information includes multiple sets of subnet information, corresponding OTN central office equipment, and multiple address information. It can be understood that multiple address information corresponding to different subnets are stored in the management and control system, and the management and control system needs to assign the corresponding OTN device to the client OTN device according to the subnet where the client OTN device is located (that is, the corresponding OTN central office device) The address information of the subnet (that is, the corresponding OTN central office equipment).

As an implementation manner, before the management and control system sends a response message to the first client OTN device through the first OTN central office device, the method further includes: the management and control system is based on the request message Query the subnet configuration information in the second address information, determine the subnet information corresponding to the first client OTN device, and select one address information from the multiple address information corresponding to the subnet information as the first Four address information.

Based on the foregoing embodiment, the embodiment of the present application also provides an address obtaining method. Fig. 4 is a schematic diagram of the third process of the method for obtaining an address according to an embodiment of this application; as shown in Fig. 4, the method includes:

Step 301: The first OTN central office device forwards the request message sent by the first client OTN device to the management and control system; the request message arriving at the management and control system includes the first address information of the first client OTN device and The second address information of the first OTN central office device;

Step 302: The first OTN central office device forwards the response message sent by the management and control system to the first client OTN device; the response message includes the third address information of the management and control system and the Fourth address information allocated by the management and control system to the first client OTN device.

In an optional embodiment of the present application, the forwarding of the request message sent by the first client OTN device to the management and control system by the first OTN central office device includes: the first OTN central office device obtains the first OTN central office device A first request message sent by a client OTN device by broadcasting; the first request message includes the first address information of the first client OTN device; the first OTN central office device is Adding the second address information to the first request message generates a second request message, and sends the second request message to the management and control system in a unicast manner.

Secondly, configure routing configuration information (also called DCN routing table) for each OTN central office device. The routing configuration information includes a subnet forwarding strategy, that is, a packet forwarding policy between the OTN central office device and the management and control system. Pre-configured. Since the OTN central office equipment is pre-deployed in the network deployment phase, the forwarding strategy of the message is determined by configuring the routing configuration information. There is no need to configure the forwarding strategy on each client OTN equipment, which will greatly reduce the number of routing tables and speed up Route lookup table and packet forwarding speed (if no OTN central office device or subnet is set, a complete packet forwarding strategy needs to be configured for each client OTN device); in addition, even if client OTN devices are subsequently added, There is also no need to update the routing configuration information in the OTN central office device. Compared with the configuration of a complete packet forwarding strategy in the client OTN device, this situation requires updating the path every time a client OTN device is added. The above message forwarding strategy, the technical solution of the embodiment of the present application also greatly reduces the consumption of human resources to a certain extent.

Based on this, as an implementation manner, the method further includes: the first OTN central office device obtains routing configuration information; the routing configuration information is used to indicate that the message is transmitted from the management and control system to the client OTN device Transmission path; the first OTN central office device forwards the request message sent by the first client OTN device to the management and control system, including: the first OTN central office device forwards the first client OTN device to send based on the routing configuration information The request message of the control system.

In this embodiment, the request message and the response message are DHCP messages; the DHCP message includes a first specific field, a second specific field, and a third specific field; the first specific field is used for The first address information and the fourth address information are added, the second specific field is used to add the second address information, and the third specific field is used to add the third address information.

Table 1 is a schematic diagram of a message format according to an embodiment of the application; specifically, a schematic diagram of a DHCP message format.

Table 1

As shown in Table 1, the definition of each field in the message is:

1. op, message type, 1 means request message, 2 means response message;

2. htype, hardware address type, 1 represents the hardware address of 10Mb/s Ethernet;

3. hlen, hardware address length, the value of this field in Ethernet is 6;

4. Hops, the number of hops; the client is set to 0, or it can be set by a proxy server;

5. xid, transaction ID, a random number selected by the client, used by the server and client to communicate requests and responses between them, and the client uses this field to match requests and responses. The ID is set by the client and returned by the server as a 32-bit integer;

6. secs, filled by the client, indicates the number of seconds since the client started to obtain the IP address or the IP address was renewed;

7. Flags, flag field; 16 bits, currently only the leftmost bit is defined. The bit position is 0, which means unicast, and set to 1 means broadcast;

8. ciaddr, the IP address of the client. Only when the client is in Bound, Renew, and Rebinding status, and can respond to ARP requests, can it be filled;

9. yiaddr, the IP address of the device itself or the IP address of the client;

10. siaddr, indicating the IP address of the server to be used in the next stage of the DHCP protocol process;

11. giaddr, the IP address of the DHCP relay;

12. Chaddr, client hardware address;

13. sname, optional server host name, this field is a null-terminated string to be filled in by the server;

14. file, the name of the startup file, is a null-terminated string. The DHCP Discover message contains a "generic" name or empty characters, and the DHCP Offer message provides a valid full name of the directory path;

15. options, optional parameter field, the format is "code+length+data".

In this embodiment, the request message and the response message are both DHCP messages, and the first address information, the second address information, the third address information, and the first address information are filled in through certain specific fields in the DHCP message. Four address information.

As an example, the first address information, the second address information, the third address information, and the fourth address information can be filled in with reference to Table 2. For example, the first address information, the second address information, the third address information, and the fourth address information can be filled in in the request message stage through the yiaddr field. Address information (the default IP address assigned by the first client OTN device when it leaves the factory), and fill in the fourth address information (that is, the IP address assigned by the management and control system for the first client OTN device) in the response message stage through the yiaddr field; Fill in the second address information (that is, the IP address of the OTN central office device) through the giaddr field; and fill in the third address information (that is, the IP address of the management and control system) through the sname field.

Table 2

The address acquisition method in the embodiment of the present application will be described in detail below with reference to a specific example.

FIG. 5 is a fourth flowchart of the method for obtaining an address according to an embodiment of this application; as shown in FIG. 5, the method includes:

Step 401: The first client OTN device sends a first request message by broadcasting, and the yiaddr field in the first request message is filled with the default IP address of the first client OTN device;

Step 402: The first OTN central office device receives the first request message, and fills in the IP address of the first OTN central office device in the giaddr field in the first request message to generate a second request message , Sending the second request message to the management and control system in a unicast manner;

Step 403: The management and control system receives the second request message, determines the first OTN central office device based on the giaddr field in the second request message, and obtains multiple IP addresses corresponding to the first OTN central office device. Choose an IP address to fill in the yiaddr field in the response message, and fill in its own IP address in the sname field, and send the response message to the first OTN central office device;

Step 404: The first OTN central office device forwards the response message to the first client OTN device;

Step 405: The first client OTN device obtains the response message, and obtains the IP address of the management and control system, the IP address assigned to it, and so on from the response message.

By adopting the technical solution of the embodiment of the present application, the first OTN central office device forwards the message, without the client OTN device manually configuring the IP address and other parameters of the management and control system, and the client OTN device automatically obtains the IP address of the management and control system. , Thus realizing the automatic docking between the client OTN equipment and the management and control system, on the other hand, it also greatly improves the user experience.

The embodiment of the present application also provides a client OTN device, and the client OTN device is a first client OTN device. FIG. 6 is a schematic diagram of a composition structure of a client OTN device according to an embodiment of the application; as shown in FIG. 6, the device includes: a first sending unit 51 and a first receiving unit 52; wherein,

The first sending unit 51 is configured to send a request message to the management and control system through a first OTN central office device; the request message arriving at the management and control system includes the first address information of the first client OTN device and The second address information of the first OTN central office device;

The first receiving unit 52 is configured to obtain a response message sent by the management and control system through the first OTN central office device, and the response message includes the third address information of the management and control system and the management and control system. The fourth address information allocated by the system to the first client OTN device.

In an optional embodiment of the embodiment of the present application, the first sending unit 51 is configured to send a first request message by broadcasting; the first request message includes the first client The first address information of the OTN device; the first request message is received by the first OTN central office device, and the second address information is added to the first request message to generate and send it to the management and control system Send the second request message.

In an optional embodiment of the embodiment of the present application, as shown in FIG. 7, the device further includes a generating unit 53 configured to access the first OTN central office device to generate an address routing table; the address The routing table is used to indicate the transmission path of the message from the first client OTN device to the management and control system.

In the embodiment of the present application, the request message and the response message are DHCP messages;

The DHCP message includes a first specific field, a second specific field, and a third specific field; the first specific field is used to add the first address information and the fourth address information, and the second specific field Is used to add the second address information, and the third specific field is used to add the third address information.

In the embodiment of the present application, the generating unit 53 in the client OTN device can be implemented by the central processing unit (CPU, Central Processing Unit) and the digital signal processor (DSP, Digital Signal Processor) in the device in practical applications. , Microcontroller Unit (MCU, Microcontroller Unit) or Programmable Gate Array (FPGA, Field-Programmable Gate Array) implementation; the first sending unit 51 and the first receiving unit 52 in the client OTN device are used in practical applications It can be realized by communication module (including: basic communication kit, operating system, communication module, standardized interface and protocol, etc.) and transceiver antenna.

It should be noted that when the client OTN device provided in the above embodiment performs address acquisition processing, only the division of the above program modules is used for illustration. In actual applications, the above processing can be allocated to different program modules according to needs. Complete, that is, divide the internal structure of the device into different program modules to complete all or part of the processing described above. In addition, the client OTN device provided in the foregoing embodiment and the address acquisition method embodiment belong to the same concept, and the specific implementation process is detailed in the method embodiment, which will not be repeated here.

The embodiment of the present application also provides a management and control system. FIG. 8 is a schematic diagram 1 of the composition structure of the management and control system according to an embodiment of the application; as shown in FIG. 8, the management and control system includes: a second receiving unit 61 and a second sending unit 62; wherein,

The second receiving unit 61 is configured to obtain the request message sent by the first client OTN device through the first OTN central office device; the request message includes the first address information of the first client OTN device And the second address information of the first OTN central office device;

The second sending unit 62 is configured to send a response message to the first client OTN device through the first OTN central office device, and the response message includes the third address information of the management and control system and The fourth address information allocated by the management and control system to the first client OTN device.

In an optional embodiment of the embodiment of the present application, the second receiving unit 61 is configured to obtain the second request packet sent by the first OTN central office device in a unicast manner; the second The request message is generated by adding the second address information to the first request message after the first OTN central office device obtains the first request message sent by the first client OTN device; The first request message includes the first address information of the first client OTN device.

In an optional embodiment of the embodiment of the present application, as shown in FIG. 9, the management and control system further includes an obtaining unit 63 configured to obtain subnet configuration information, and the subnet configuration information includes multiple groups of subnets. Information, the corresponding OTN central office equipment, and multiple address information; the subnet information and the OTN central office equipment correspond one-to-one; the multiple address information corresponds to the subnet information and can be allocated to the client OTN Address information of the device.

In an optional embodiment of the embodiment of the present application, as shown in FIG. 10, the management and control system further includes a determining unit 64, configured to send the second sending unit 62 to the station through the first OTN central office device. Before the first client OTN device sends a response message, query the subnet configuration information based on the second address information in the request message to determine the subnet information corresponding to the first client OTN device, One piece of address information is selected as the fourth address information from a plurality of address information corresponding to the subnet information.

In the embodiment of the present application, the acquiring unit 63 and the determining unit 64 in the management and control system can be implemented by the CPU, DSP, MCU or FPGA in the management and control system in practical applications; the second sending unit in the management and control system 62 and the second receiving unit 61 can be implemented by a communication module (including a basic communication kit, an operating system, a communication module, a standardized interface and a protocol, etc.) and a transceiver antenna in practical applications.

It should be noted that when the management and control system provided in the above embodiment performs address acquisition processing, only the division of the above-mentioned program modules is used as an example for illustration. In actual applications, the above-mentioned processing can be allocated by different program modules as needed. That is, the internal structure of the management and control system is divided into different program modules to complete all or part of the processing described above. In addition, the management and control system provided in the foregoing embodiment and the address acquisition method embodiment belong to the same concept, and the specific implementation process is detailed in the method embodiment, which will not be repeated here.

The embodiment of the application also provides an OTN central office equipment, the OTN central office equipment is the first OTN central office equipment; FIG. 11 is a schematic diagram 1 of the composition structure of the OTN central office equipment according to an embodiment of the application; as shown in FIG. 11 As shown, the device includes: a first communication unit 71 and a second communication unit 72; wherein,

The first communication unit 71 is configured to obtain a request message sent by the first client OTN device; and is also configured to forward a response message sent by the management and control system to the first client OTN device;

The second communication unit 72 is configured to forward the request message to the management and control system; and is also configured to obtain a response message sent by the management and control system;

In an optional embodiment of the present application, as shown in FIG. 12, the device further includes a processing unit 73;

The first communication unit 71 is configured to obtain a first request message sent by the first client OTN device by broadcasting; the first request message includes the first request message of the first client OTN device One address information;

The processing unit 73 is configured to add the second address information to the first request message to generate a second request message;

The second communication unit 72 is configured to send the second request message to the management and control system in a unicast manner.

In an optional embodiment of the present application, as shown in FIG. 13, the device further includes an obtaining unit 74 configured to obtain routing configuration information; the routing configuration information is used to indicate that the packet is transmitted by the management and control system Transmission path to client OTN equipment;

The second communication unit 72 is configured to forward a request message sent by the first client OTN device to the management and control system based on the routing configuration information obtained by the obtaining unit 74.

In the embodiment of the present application, the processing unit 73 and the acquiring unit 74 in the OTN central office equipment can be implemented by the CPU, DSP, MCU or FPGA in the equipment in practical applications; the first communication in the OTN central office equipment The unit 71 and the second communication unit 72 can be implemented by a communication module (including: a basic communication kit, an operating system, a communication module, a standardized interface and a protocol, etc.) and a transceiver antenna in practical applications.

It should be noted that when the OTN central office device provided in the above embodiment performs address acquisition processing, only the division of the above program modules is used as an example for illustration. In actual applications, the above processing can be allocated to different program modules according to needs. Complete, that is, divide the internal structure of the device into different program modules to complete all or part of the processing described above. In addition, the OTN central office equipment provided in the foregoing embodiment belongs to the same concept as the address acquisition method embodiment, and the specific implementation process is detailed in the method embodiment, and will not be repeated here.

The embodiment of the present application also provides a communication device. The communication device may specifically be a client OTN device, a management and control system, or an OTN central office device. FIG. 14 is a schematic diagram of the hardware composition structure of a communication device according to an embodiment of the application. As shown in FIG. 14, the communication device 80 includes a memory 82, a processor 81, and a computer stored on the memory 82 and running on the processor 81 A program, when the processor 81 executes the program, the steps of the address obtaining method applied to the client OTN device, the management and control system, or the OTN central office device in the embodiment of the present application are implemented.

It can be understood that the communication device 80 also includes a communication interface 83. The various components in the communication device 80 can be coupled together through the bus system 84. It can be understood that the bus system 84 is used to implement connection and communication between these components. In addition to the data bus, the bus system 84 also includes a power bus, a control bus, and a status signal bus. However, for the sake of clarity, various buses are marked as the bus system 84 in FIG. 14.

It is understood that the memory 82 may be a volatile memory or a non-volatile memory, and may also include both volatile and non-volatile memory. Among them, the non-volatile memory can be read-only memory (ROM, Read Only Memory), programmable read-only memory (PROM, Programmable Read-Only Memory), and erasable programmable read-only memory (EPROM, Erasable Programmable Read- Only Memory, Electrically Erasable Programmable Read-Only Memory (EEPROM, Electrically Erasable Programmable Read-Only Memory), magnetic random access memory (FRAM, ferromagnetic random access memory), flash memory (Flash Memory), magnetic surface memory , CD-ROM, or CD-ROM (Compact Disc Read-Only Memory); magnetic surface memory can be magnetic disk storage or tape storage. The volatile memory may be a random access memory (RAM, Random Access Memory), which is used as an external cache. By way of exemplary but not restrictive description, many forms of RAM are available, such as static random access memory (SRAM, Static Random Access Memory), synchronous static random access memory (SSRAM, Synchronous Static Random Access Memory), and dynamic random access memory. Memory (DRAM, Dynamic Random Access Memory), Synchronous Dynamic Random Access Memory (SDRAM, Synchronous Dynamic Random Access Memory), Double Data Rate Synchronous Dynamic Random Access Memory (DDRSDRAM, Double Data Rate Synchronous Dynamic Random Access Memory), enhanced Type synchronous dynamic random access memory (ESDRAM, Enhanced Synchronous Dynamic Random Access Memory), synchronous connection dynamic random access memory (SLDRAM, SyncLink Dynamic Random Access Memory), direct memory bus random access memory (DRRAM, Direct Rambus Random Access Memory) ). The memory 82 described in the embodiments of the present application is intended to include, but is not limited to, these and any other suitable types of memory.

The method disclosed in the foregoing embodiments of the present application may be applied to the processor 81 or implemented by the processor 81. The processor 81 may be an integrated circuit chip with signal processing capability. In the implementation process, the steps of the foregoing method can be completed by an integrated logic circuit of hardware in the processor 81 or instructions in the form of software. The aforementioned processor 81 may be a general-purpose processor, a DSP, or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, and the like. The processor 81 may implement or execute various methods, steps, and logical block diagrams disclosed in the embodiments of the present application. The general-purpose processor may be a microprocessor or any conventional processor or the like. Combining the steps of the method disclosed in the embodiments of the present application, it may be directly embodied as being executed and completed by a hardware decoding processor, or executed and completed by a combination of hardware and software modules in the decoding processor. The software module may be located in a storage medium, and the storage medium is located in the memory 82. The processor 81 reads the information in the memory 82 and completes the steps of the foregoing method in combination with its hardware.

In an exemplary embodiment, the communication device 80 may be configured by one or more Application Specific Integrated Circuits (ASIC, Application Specific Integrated Circuit), DSP, Programmable Logic Device (PLD, Programmable Logic Device), and Complex Programmable Logic Device (CPLD). , Complex Programmable Logic Device, FPGA, general-purpose processor, controller, MCU, microprocessor (Microprocessor), or other electronic components to implement the foregoing method.

In an exemplary embodiment, the embodiment of the present application also provides a computer-readable storage medium, such as a memory 82 including a computer program, which can be executed by the processor 81 of the communication device 80 to complete the steps described in the foregoing method. . The computer-readable storage medium may be a memory such as FRAM, ROM, PROM, EPROM, EEPROM, Flash Memory, magnetic surface memory, optical disk, or CD-ROM.

The embodiment of the present application also provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, it realizes the application of the client OTN equipment, the management and control system, or the OTN central office equipment in the embodiments of the present application. The steps of the address obtaining method.

The methods disclosed in the several method embodiments provided in this application can be combined arbitrarily without conflict to obtain new method embodiments.

The features disclosed in the several product embodiments provided in this application can be combined arbitrarily without conflict to obtain new product embodiments.

The features disclosed in the several method or device embodiments provided in this application can be combined arbitrarily without conflict to obtain a new method embodiment or device embodiment. In the several embodiments provided in this application, it should be understood that the disclosed device and method may be implemented in other ways. The device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division, and there may be other divisions in actual implementation, such as: multiple units or components can be combined, or It can be integrated into another system, or some features can be ignored or not implemented. In addition, the coupling, or direct coupling, or communication connection between the components shown or discussed may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms. of.

The units described above as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units; Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, the functional units in the embodiments of the present application can be all integrated into one processing unit, or each unit can be individually used as a unit, or two or more units can be integrated into one unit; The unit can be implemented in the form of hardware, or in the form of hardware plus software functional units.

A person of ordinary skill in the art can understand that all or part of the steps in the above method embodiments can be implemented by a program instructing relevant hardware. The foregoing program can be stored in a computer readable storage medium. When the program is executed, it is executed. Including the steps of the foregoing method embodiment; and the foregoing storage medium includes: various media that can store program codes, such as a mobile storage device, ROM, RAM, magnetic disk, or optical disk.

Alternatively, if the above-mentioned integrated unit of the present application is implemented in the form of a software function module and sold or used as an independent product, it may also be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the embodiments of the present application can be embodied in the form of a software product in essence or a part that contributes to the prior art. The computer software product is stored in a storage medium and includes several instructions for A computer device (which may be a personal computer, a server, or a network device, etc.) executes all or part of the methods described in the various embodiments of the present application. The aforementioned storage media include: removable storage devices, ROM, RAM, magnetic disks, or optical disks and other media that can store program codes.

The above are only specific implementations of this application, but the protection scope of this application is not limited to this. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in this application. Should be covered within the scope of protection of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

An address obtaining method, the method includes:

The OTN device of the first client optical transport network sends a request message to the management and control system through the first OTN central office device; the request message arriving at the management and control system includes the first address information of the first client OTN device and the The second address information of the first OTN central office device;

The first client OTN device obtains the response message sent by the management and control system through the first OTN central office device, and the response message includes the third address information of the management and control system and the management and control system is The fourth address information allocated by the first client OTN device.
The method according to claim 1, wherein the first client OTN device sending a request message to the management and control system through the first OTN central office device comprises:

The first client OTN device sends a first request message by broadcasting; the first request message includes the first address information of the first client OTN device; the first request message is The first OTN central office device receives, adds the second address information to the first request message, generates and sends a second request message to the management and control system.
The method according to claim 1, wherein the method further comprises:

The first client OTN device accesses the first OTN central office device to generate an address routing table; the address routing table is used to indicate that packets are transmitted from the first client OTN device to the management and control system Transmission path.
The method according to any one of claims 1 to 3, wherein the request message and the response message are dynamic host setting protocol DHCP messages;

The DHCP message includes a first specific field, a second specific field, and a third specific field; the first specific field is used to add the first address information and the fourth address information, and the second specific field Is used to add the second address information, and the third specific field is used to add the third address information.
An address obtaining method, the method includes:

The management and control system obtains the request message sent by the first client OTN device through the first OTN central office device; the request message includes the first address information of the first client OTN device and the first OTN central office device The second address information of the device;

The management and control system sends a response message to the first client OTN device through the first OTN central office device, and the response message includes the third address information of the management and control system and the management and control system is The fourth address information allocated by the first client OTN device.
The method according to claim 5, wherein the management and control system obtains the request message sent by the first client OTN device through the first OTN central office device, comprising:

The management and control system obtains the second request message sent by the first OTN central office device through unicast; the second request message is that the first OTN central office device obtains the first client OTN After the first request message sent by the device, it is generated by adding the second address information to the first request message; the first request message includes the first address of the first client OTN device information.
The method according to claim 5, wherein before the management and control system obtains the request message sent by the first client OTN device through the first OTN central office device, the method further comprises:

The management and control system obtains subnet configuration information, and the subnet configuration information includes multiple sets of subnet information, corresponding OTN central office equipment, and multiple address information; the subnet information and the OTN central office equipment one by one Correspondence; the multiple address information is address information corresponding to the subnet information and that can be allocated to the client OTN device.
The method according to claim 7, wherein before the management and control system sends a response message to the first client OTN device through the first OTN central office device, the method further comprises:

The management and control system queries the subnet configuration information based on the second address information in the request message, determines the subnet information corresponding to the first client OTN device, and determines the subnet information corresponding to the subnet information. One piece of address information is selected as the fourth piece of address information.
The method according to any one of claims 5 to 8, wherein the request message and the response message are DHCP messages;

The DHCP message includes a first specific field, a second specific field, and a third specific field; the first specific field is used to add the first address information and the fourth address information, and the second specific field Is used to add the second address information, and the third specific field is used to add the third address information.
An address obtaining method, the method includes:

The first OTN central office device forwards the request message sent by the first client OTN device to the management and control system; the request message arriving at the management and control system includes the first address information of the first client OTN device and the first address information -The second address information of the OTN central office equipment;

The first OTN central office device forwards the response message sent by the management and control system to the first client OTN device; the response message includes the third address information of the management and control system and the management and control system is The fourth address information allocated by the first client OTN device.
The method according to claim 10, wherein the forwarding of the request message sent by the first client OTN device to the management and control system by the first OTN central office device comprises:

The first OTN central office device obtains the first request message sent by the first client OTN device by broadcasting; the first request message includes the first address of the first client OTN device information;

The first OTN central office device adds the second address information to the first request message to generate a second request message, and sends the second request message to the management and control system in a unicast manner.
The method according to claim 10 or 11, wherein the method further comprises:

The first OTN central office device obtains routing configuration information; the routing configuration information is used to indicate the transmission path of the packet from the management and control system to the client OTN device;

The forwarding of the request message sent by the first client OTN device to the management and control system by the first OTN central office device includes: the first OTN central office device forwards the request message sent by the first client OTN device to the management and control system based on the routing configuration information Request message.
The method according to claim 12, wherein the request message and the response message are DHCP messages;

The DHCP message includes a first specific field, a second specific field, and a third specific field; the first specific field is used to add the first address information and the fourth address information, and the second specific field Is used to add the second address information, and the third specific field is used to add the third address information.
A client OTN device, the client OTN device is a first client OTN device; the device includes: a first sending unit and a first receiving unit; wherein,

The first sending unit is configured to send a request message to the management and control system through a first OTN central office device; the request message arriving at the management and control system includes the first address information of the first client OTN device and all The second address information of the first OTN central office device;

The first receiving unit is configured to obtain a response message sent by the management and control system through the first OTN central office device, and the response message includes the third address information of the management and control system and the management and control system Fourth address information allocated to the first client OTN device.
The device according to claim 14, wherein the first sending unit is configured to send the first request message by broadcasting; the first request message includes the first client OTN device An address information; the first request message is received by the first OTN central office device, and the second address information is added to the first request message to generate and send a second request to the management and control system Message.
The device according to claim 14, wherein the device further comprises a generating unit configured to access the first OTN central office device to generate an address routing table; the address routing table is used to indicate that packets are sent by the The first client OTN device is transmitted to the transmission path of the management and control system.
The device according to any one of claims 14 to 16, wherein the request message and the response message are DHCP messages;

The DHCP message includes a first specific field, a second specific field, and a third specific field; the first specific field is used to add the first address information and the fourth address information, and the second specific field Is used to add the second address information, and the third specific field is used to add the third address information.
A management and control system, the management and control system includes: a second receiving unit and a second sending unit; wherein,

The second receiving unit is configured to obtain the request message sent by the first client OTN device through the first OTN central office device; the request message includes the first address information of the first client OTN device and The second address information of the first OTN central office device;

The second sending unit is configured to send a response message to the first client OTN device through the first OTN central office device, and the response message includes the third address information of the management and control system and the The fourth address information allocated by the management and control system to the first client OTN device.
The management and control system according to claim 18, wherein the second receiving unit is configured to obtain the second request message sent by the first OTN central office device in a unicast manner; the second request message It is generated by adding the second address information to the first request message after the first OTN central office device obtains the first request message sent by the first client OTN device; the first The request message includes the first address information of the first client OTN device.
The management and control system according to claim 18, wherein the management and control system further comprises an obtaining unit configured to obtain subnet configuration information, and the subnet configuration information includes multiple sets of subnet information, corresponding OTN central office equipment, and A plurality of address information; the subnet information and the OTN central office device have a one-to-one correspondence; the plurality of address information corresponds to the subnet information and can be allocated to the client OTN device.
The management and control system according to claim 20, wherein the management and control system further comprises a determining unit configured to send a response report to the first client OTN device through the first OTN central office device by the second sending unit Before the article, query the subnet configuration information based on the second address information in the request message, and determine the subnet information corresponding to the first client OTN device, from the multiple subnet information corresponding to the subnet information. One address information is selected as the fourth address information in the address information.
The management and control system according to any one of claims 18 to 21, wherein the request message and the response message are DHCP messages;

The DHCP message includes a first specific field, a second specific field, and a third specific field; the first specific field is used to add the first address information and the fourth address information, and the second specific field Is used to add the second address information, and the third specific field is used to add the third address information.
An OTN central office equipment, the OTN central office equipment is a first OTN central office equipment; the equipment includes: a first communication unit and a second communication unit; wherein,

The first communication unit is configured to obtain a request message sent by the first client OTN device; and is also configured to forward a response message sent by the management and control system to the first client OTN device;

The second communication unit is configured to forward the request message to the management and control system; and is also used to obtain a response message sent by the management and control system;

Wherein, the request message arriving at the management and control system includes the first address information of the first client OTN device and the second address information of the first OTN central office device; the response message includes the The third address information of the management and control system and the fourth address information allocated by the management and control system to the first client OTN device.
The device according to claim 23, wherein the device further comprises a processing unit;

The first communication unit is configured to obtain a first request message sent by the first client OTN device by broadcasting; the first request message includes the first request message of the first client OTN device Address information;

The processing unit is configured to add the second address information to the first request message to generate a second request message;

The second communication unit is configured to send the second request message to the management and control system in a unicast manner.
The device according to claim 23 or 24, wherein the device further comprises an obtaining unit configured to obtain routing configuration information; the routing configuration information is used to indicate that the message is transmitted from the management and control system to the client OTN device Transmission path

The second communication unit is configured to forward a request message sent by the first client OTN device to the management and control system based on the routing configuration information obtained by the obtaining unit.
The device according to claim 25, wherein the request message and the response message are DHCP messages;

The DHCP message includes a first specific field, a second specific field, and a third specific field; the first specific field is used to add the first address information and the fourth address information, and the second specific field Is used to add the second address information, and the third specific field is used to add the third address information.
A computer-readable storage medium with a computer program stored thereon, which implements the steps of any one of claims 1 to 4 when the program is executed by a processor; or, implements claim 5 when the program is executed by a processor Steps of the method described in any one of claims 10 to 13; or, the program is executed by a processor to implement the steps of the method described in any one of claims 10 to 13.
A communication device, comprising a memory, a processor, and a computer program stored on the memory and running on the processor, and the processor implements the steps of the method according to any one of claims 1 to 4 when the processor executes the program; Or, when the processor executes the program, the steps of the method according to any one of claims 5 to 9 are implemented; or, when the processor executes the program, the steps of the method according to any one of claims 10 to 13 are implemented. step.