CN116980779B - Separated optical line terminal equipment and optical line terminal port expansion method - Google Patents
Separated optical line terminal equipment and optical line terminal port expansion method Download PDFInfo
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- CN116980779B CN116980779B CN202310871649.XA CN202310871649A CN116980779B CN 116980779 B CN116980779 B CN 116980779B CN 202310871649 A CN202310871649 A CN 202310871649A CN 116980779 B CN116980779 B CN 116980779B
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- 230000003287 optical effect Effects 0.000 title claims abstract description 201
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000013475 authorization Methods 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 239000013307 optical fiber Substances 0.000 description 4
- 230000006870 function Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q11/0067—Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q2011/0079—Operation or maintenance aspects
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Abstract
The invention discloses a separated optical line terminal equipment and an optical line terminal port expanding method, wherein one end of the separated optical line terminal equipment is connected with a main optical line terminal, and the other end of the separated optical line terminal equipment is connected with optical network unit equipment, and the separated optical line terminal equipment comprises a storage module, a PON chip and an external interface, wherein: the storage module is stored with initialization software and is connected with the PON chip; the PON chip is internally provided with a CPU, and the CPU of the PON chip acquires the initialization software from the storage module to perform hardware initialization operation; the external interface comprises an uplink interface and a plurality of PON interfaces, wherein the uplink interface is connected with the main optical line terminal, and the plurality of PON interfaces are provided by the PON chip and are respectively connected with optical network unit equipment. The invention is connected with the separated optical line terminal equipment through the upper connecting port of the original main optical line terminal, thereby realizing the expansion purpose of the newly added PON port.
Description
Technical Field
The present invention relates to the field of passive optical network access, and more particularly, to a split optical line terminal device and an optical line terminal port extension method.
Background
A passive optical network (Passive Optical Network, PON) is widely used as a fast and efficient broadband access mode. In a conventional Optical network, an Optical line terminal (Optical LINE TERMINAL, OLT) device is an important local side device, and functions implemented by the Optical line terminal device are as follows: 1. the optical signal is converted into optical signal by connecting with front-end (convergence layer) exchanger through network cable, and is interconnected with optical splitter at user end through single optical fiber. 2. The functions of controlling, managing, ranging and the like of the user terminal equipment ONU (Optical Network Unit ) are realized. 3. The OLT device is also an optoelectronic integrated device, as is the ONU device. The optical line terminal typically contains an integrated PON functional module, which limits the physical space in which the number of PON ports and PON functional modules are fixed.
There are several techniques in the prior art to achieve port expansion by expanding the number of PON ports. One solution is to increase the number of PON ports by combining multiple active ports into one virtual port, but it requires management using complex software algorithms, especially when deployed on a large scale, which is often difficult to meet the required QoS performance. Another solution is to implement the expansion of the number of PON ports by adding PON functional cards. This solution requires a reserved socket for the hardware device, and at the same time cannot solve the spatial limitation of the PON functional module.
The prior art has the following disadvantages:
In conventional optical networks, OLT apparatuses typically contain one integrated PON functional module, which limits the number of PON ports therein. While the above prior art solution implements port expansion to some extent, it requires management or hardware upgrade using complex software algorithms, reducing its feasibility and increasing deployment and maintenance costs. The biggest problem is that the traditional equipment needs to be fixed in the same space (a machine shell and a machine frame), and the arbitrary deployment and extension in space cannot be achieved.
Disclosure of Invention
The primary purpose of the invention is to provide a separated optical line terminal device, which solves the problem that the number of interfaces of the traditional OLT is limited.
A further object of the present invention is to provide an optical line terminal port expansion method.
In order to solve the technical problems, the technical scheme of the invention is as follows:
one end of the separated optical line terminal equipment is connected with the main optical line terminal, and the other end of the separated optical line terminal equipment is connected with the optical network unit equipment, and the separated optical line terminal equipment comprises a storage module, a PON chip and an external interface, wherein:
the storage module is stored with initialization software and is connected with the PON chip;
The PON chip is internally provided with a CPU, and the CPU of the PON chip acquires the initialization software from the storage module to perform hardware initialization operation;
the external interface comprises an uplink interface and a plurality of PON interfaces, wherein the uplink interface is connected with the main optical line terminal, and the plurality of PON interfaces are provided by the PON chip and are respectively connected with optical network unit equipment.
In the above technical solution, the upper port of the original main optical line terminal is connected with the split optical line terminal device of the present invention, so as to achieve the expansion purpose of the newly added PON port. Meanwhile, the access of the separated optical line terminal equipment does not affect the original service deployment, and the equipment updating and upgrading cost is reduced. Therefore, the invention increases the flexibility of the traditional optical line terminal equipment, expands the number of PON access ports, reduces the deployment cost and optimizes the use experience of the optical fiber broadband access. Most importantly, the separated optical line terminal equipment breaks through the short board of the traditional optical line terminal in physical space, so that flexible deployment can be carried out according to the needs, and the deployed network is minimally changed to achieve the purpose of expanding access.
In a further scheme, the memory module comprises a DDR memory chip and a Nor Flash chip.
In a further scheme, the external interface further comprises a control serial interface, and the control serial interface provides a configured interface and a debugging means for configuring an Ethernet-connected data channel and the IP address information of the main OLT to be accessed, and prepares for downloading and starting the service system through the control serial interface.
In a further scheme, the external interface further comprises a power interface, the power interface is connected with an external power supply, and each module in the separated optical line terminal equipment is powered by the external power supply.
In a further aspect, the optical network unit device is responsible for authorization and management by the main optical line terminal through the split optical line terminal device, the split optical line terminal device provided by the invention extends PON ports, the access of the optical network unit equipment is increased, but the authorization and the management of the optical network unit equipment are still uniformly responsible for the original master optical line terminal, the original service deployment is not affected, and the equipment updating and upgrading cost is reduced.
In a further scheme, the split optical line device downloads firmware from the main optical line terminal device to the storage module through tftp, performs system starting and system resource initializing operation of the split optical line terminal device, maintains connection with the main optical line terminal device all the time after the service system is started, and simultaneously receives service configuration and management of the main optical line terminal device.
In a further scheme, the split optical line terminal device is adapted to various PON devices including GPON, EPON, 10GEPON, XGPON and XGSPON, and the split optical line terminal device provided by the present invention is suitable for various PON devices of a common type, such as GPON, EPON, 10GEPON, XGPON, XGSPON, etc., has higher compatibility and universal applicability, and can flexibly access PON protocols such as EPON, GPON,10GEPON,XGPON,XGSPON, etc.
An optical line terminal port expansion method uses the uplink interface of the separated optical line terminal equipment to be connected with a main optical line terminal, and uses a plurality of PON interfaces of the separated optical line terminal equipment to be respectively connected with optical network unit equipment.
In the technical scheme, the number of ports of the OLT equipment is expanded by connecting the separated optical line terminal equipment with the originally deployed OLT.
In a further aspect, the uplink interface of the split optical line termination device is physically connected to the main optical line termination device, and the split optical line termination device may be placed at any position that is closer to or farther from the main optical line termination device by being physically connected to the main optical line termination device.
In a further aspect, the plurality of PON interfaces of the split optical line terminal device are respectively connected to an optical network unit device through an optical splitter.
Compared with the prior art, the technical scheme of the invention has the beneficial effects that:
1. The separated optical line terminal equipment provided by the invention is connected with the originally deployed main optical line terminal through the upper connecting port, so that the number of ports of the main optical line terminal equipment is expanded. This allows the main optical line terminal device to connect to more customer premise network units, improving the coverage and capacity of broadband access. Meanwhile, the original network is not required to be upgraded and modified, and the purpose can be achieved by only upgrading the firmware by the original equipment. The capability and bandwidth resources of the existing equipment are fully utilized, waste is avoided, the cost is reduced, and the income of a service provider is increased;
2. The invention simplifies the maintenance of the optical line terminal equipment, and the separated optical line terminal equipment provided by the invention can be compatible with various PON equipment by using the standardized interface, thereby reducing the maintenance cost of the equipment and improving the usability of the equipment. The ONU accessed by the separated optical line terminal equipment is unified to be authorized and managed by the main optical line terminal;
3. The cost of equipment updating and updating is reduced, and the separated optical line terminal equipment provided by the invention can expand the port of the optical line terminal equipment without updating or replacing the equipment, so that the cost of equipment updating is reduced, and a higher return on investment is brought;
4. the split optical line terminal equipment provided by the invention has no strict definition on space, and can be deployed according to the requirement.
Drawings
Fig. 1 is a schematic structural diagram of a split optical line terminal device according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a split optical line terminal device accessing an extended PON port according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of management and service channels of an optical network unit accessed by a main optical line terminal device and a split optical line terminal device according to an embodiment of the present invention.
Fig. 4 is a schematic diagram of an arbitrary access space of a main optical line terminal device and a split optical line terminal device according to an embodiment of the present invention.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the present patent;
For the purpose of better illustrating the embodiments, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the actual product dimensions;
it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The technical scheme of the invention is further described below with reference to the accompanying drawings and examples.
Example 1
One end of the separated optical line terminal equipment is connected with the main optical line terminal, and the other end of the separated optical line terminal equipment is connected with the optical network unit equipment, as shown in fig. 1, the separated optical line terminal equipment comprises a storage module, a PON chip and an external interface, wherein:
the storage module is stored with initialization software and is connected with the PON chip;
The PON chip is internally provided with a CPU, and the CPU of the PON chip acquires the initialization software from the storage module to perform hardware initialization operation;
the external interface comprises an uplink interface and a plurality of PON interfaces, wherein the uplink interface is connected with the main optical line terminal, and the plurality of PON interfaces are provided by the PON chip and are respectively connected with optical network unit equipment.
The split optical line terminal equipment provided by the embodiment of the invention solves the problem that the number of interfaces of the traditional optical line terminal is limited, and simplifies the connection mode between the optical line terminal and the PON equipment. In addition, the invention adopts standardized interfaces, so that the traditional PON equipment can be compatible with the separated optical line terminal equipment, and the equipment updating and upgrading cost is reduced. Meanwhile, the optical line terminal device has the advantages of hardware capacity expansion, no space physical limitation on original deployed optical line terminals and expanded accessed separated optical line terminal devices, easiness in deployment and maintenance and the like, and the separated optical line terminal device of the embodiment of the invention has the following specific technical characteristics:
A. And accessing the separated optical line terminal equipment by using a standardized upper port with the idle existence of the traditional optical line terminal equipment.
B. The separated optical line terminal equipment only has a PON functional module, and the external interfaces are a PON interface and an upper connecting port.
C. the separated optical line terminal equipment is responsible for physical access of the user side optical network unit and data transmission.
D. the optical network unit equipment accessed by the separated optical line terminal equipment is responsible for authorization and management by the original optical line terminal equipment.
E. the separated optical line terminal equipment has no strict requirement in space, and can reach the distance of km level when the optical fiber is used for access.
F. The separated optical line terminal device has no influence on the functions of the original optical line terminal device.
G. The split optical line terminal equipment can flexibly access EPON, GPON,10GEPON,XGPON,XGSPON and other PON protocols.
H. the split optical line termination device does not require an on-chip CPU and a switching module.
Example 2
The present embodiment continues to disclose the following on the basis of embodiment 1:
In a specific embodiment, the storage module includes a DDR memory chip and a Nor Flash chip, as shown in fig. 1, after the device is powered on, a CPU built in the PON chip obtains initialization software from the Nor Flash on the board to perform a hardware initialization operation.
In a specific embodiment, the external interface further includes a control serial interface, and the control serial interface provides a configured interface and a debugging means, so as to configure an ethernet-connected data channel and the to-be-accessed main OLT IP address information, and prepare for downloading and starting the service system through the control serial interface.
In a specific embodiment, the external interface further includes a power interface, where the power interface is connected to an external power source, and supplies power to each module in the separated optical line terminal device through the external power source.
In a specific embodiment, the optical network unit device is responsible for authorization and management by the main optical line terminal through the split optical line terminal device, and the split optical line terminal device provided by the embodiment of the invention expands a PON port and increases access of the optical network unit device, but the authorization and management of the optical network unit device are still uniformly responsible for the original main optical line terminal, which does not affect the original service deployment, and reduces the cost of device update and upgrade.
In a specific embodiment, the split optical line device downloads firmware from the main optical line terminal device to the storage module through tftp, performs system startup and system resource initialization operations of the split optical line terminal device, and maintains connection with the main optical line terminal device all the time after the service system startup is completed, and accepts service configuration and management of the main optical line terminal device.
In a specific embodiment, the split optical line terminal device is adapted to various PON devices, including GPON, EPON, 10GEPON, XGPON and XGSPON, and the split optical line terminal device provided by the embodiment of the present invention is applicable to various PON devices of a common type, such as GPON, EPON, 10GEPON, XGPON, XGSPON, and has higher compatibility and universal applicability, and can flexibly access PON protocols such as EPON, GPON,10GEPON,XGPON,XGSPON.
As shown in fig. 2, the upper port of the split optical line terminal device is connected to the upper port of the original optical line terminal device to realize port expansion. After the separated optical line terminal equipment is accessed, the physical channels are communicated. And the separated optical line terminal equipment downloads firmware from the main optical line terminal equipment to the DDR memory on the board through the tftp, and then starts a service system of the separated optical line terminal equipment and initializes system resources. After the service system is started, the connection with the main optical line terminal equipment is maintained all the time, and the service configuration and management of the main optical line terminal equipment are accepted.
As shown in fig. 3, the optical network unit accessed under the split optical line terminal device is authorized and managed by the original optical line terminal device. The original management of the main optical line terminal equipment is unchanged. The optical network unit accessed by the separated optical line terminal equipment is subjected to the operations of discovery, authorization, service issuing, state management and the like by the main optical line terminal equipment. The separated optical line terminal equipment is responsible for physical access of the optical network unit and the bottom management related to PON MAC. The traffic channels of the optical network unit are shown as dashed lines in fig. 3.
As shown in fig. 4, the split optical line termination device is arbitrarily deployed in space. The split optical line termination device 1 is connected at a distance of 5 meters and is in the same machine room as the main optical line termination device. The connection distance of the split optical line termination device 2 reaches 10 km, and the split optical line termination device is not located in the same geographical location.
In summary, the beneficial effects of the embodiment of the present invention are that a simple, flexible and economical solution is provided for the port expansion of the OLT equipment, and meanwhile, a positive contribution is made to the popularization and development of the optical fiber broadband access.
Example 3
This example continued to disclose the following on the basis of examples 1 and 2:
An optical line terminal port expansion method uses the uplink interfaces of the split optical line terminal devices described in embodiments 1 and 2 to connect with a main optical line terminal, and uses the PON interfaces of the split optical line terminal devices described in embodiments 1 and 2 to connect with an optical network unit device respectively.
The embodiment of the invention realizes the expansion of the port number of the OLT equipment by connecting the separated optical line terminal equipment with the originally deployed OLT.
In a specific embodiment, the uplink interface of the split optical line terminal device is physically connected to the main optical line terminal, and the split optical line terminal device may be placed at any position near or far from the main optical line terminal by being physically connected to the main optical line terminal.
In a specific embodiment, the plurality of PON interfaces of the split optical line terminal device are respectively connected to an optical network unit device through an optical splitter.
The same or similar reference numerals correspond to the same or similar components;
the terms describing the positional relationship in the drawings are merely illustrative, and are not to be construed as limiting the present patent;
it is to be understood that the above examples of the present invention are provided by way of illustration only and not by way of limitation of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (9)
1. The utility model provides a disconnect-type optical line terminal equipment, one end is connected with the main optical line terminal, and the other end is connected with optical network unit equipment, its characterized in that includes storage module, PON chip and external interface, wherein:
the storage module is stored with initialization software and is connected with the PON chip;
The PON chip is internally provided with a CPU, and the CPU of the PON chip acquires the initialization software from the storage module to perform hardware initialization operation;
the external interface comprises an uplink interface and a plurality of PON interfaces, wherein the uplink interface and the main optical line terminal are provided by the PON chip and are respectively connected with optical network unit equipment;
The optical network unit device is responsible for authorization and management by the main optical line terminal through the separated optical line terminal device.
2. The split optical line termination device according to claim 1, wherein the memory module comprises a DDR memory chip and a Nor Flash chip.
3. The split optical line terminal device according to claim 1, wherein the external interface further comprises a con-hole serial interface, and the con-hole serial interface provides a configured interface and a debug means, so as to configure an ethernet on-line data channel and host OLTIP address information to be accessed.
4. The split optical line terminal of claim 1, wherein the external interface further comprises a power interface, the power interface being connected to an external power source.
5. The split optical line termination device according to claim 1, wherein the split optical line termination device downloads firmware from the main optical line termination device to the storage module through tftp, and performs a system start-up and an initialization operation of a system resource of the split optical line termination device.
6. The split optical line termination device according to any of claims 1 to 5, wherein the split optical line termination device is adapted to a plurality of PON devices, including GPON, EPON, 10GEPON, XGPON and XGSPON.
7. An optical line terminal port expansion method, characterized in that an uplink interface of a split optical line terminal device according to any one of claims 1 to 6 is used to connect with a main optical line terminal, and a plurality of PON interfaces of the split optical line terminal device according to any one of claims 1 to 6 are used to connect with an optical network unit device respectively.
8. The optical line termination port expansion method according to claim 7, wherein the add-on interface of the split optical line termination device is physically connected to the main optical line termination.
9. The optical line termination port expansion method according to claim 7, wherein the plurality of PON interfaces of the split optical line termination device are connected to an optical network unit device through optical splitters, respectively.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310871649.XA CN116980779B (en) | 2023-07-14 | 2023-07-14 | Separated optical line terminal equipment and optical line terminal port expansion method |
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| CN202310871649.XA CN116980779B (en) | 2023-07-14 | 2023-07-14 | Separated optical line terminal equipment and optical line terminal port expansion method |
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| CN116980779A CN116980779A (en) | 2023-10-31 |
| CN116980779B true CN116980779B (en) | 2024-10-29 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103428027A (en) * | 2013-07-30 | 2013-12-04 | 广东东研网络科技股份有限公司 | Device indication method with multiple-support function for optical line terminals |
| CN110380784A (en) * | 2019-09-02 | 2019-10-25 | 深圳市友华通信技术有限公司 | Operation expanding structure based on distributed OLT |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201986096U (en) * | 2010-12-21 | 2011-09-21 | 四川九州电子科技股份有限公司 | Terminal equipment ONU for EPON system |
| CN207010887U (en) * | 2017-06-28 | 2018-02-13 | 宏安集团有限公司 | EPON extends system |
| CN113573175B (en) * | 2020-04-29 | 2023-03-24 | 中国电信股份有限公司 | Optical line terminal and service processing method thereof |
| CN217088087U (en) * | 2022-03-16 | 2022-07-29 | 中国联合网络通信集团有限公司 | Optical line terminal communication equipment |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103428027A (en) * | 2013-07-30 | 2013-12-04 | 广东东研网络科技股份有限公司 | Device indication method with multiple-support function for optical line terminals |
| CN110380784A (en) * | 2019-09-02 | 2019-10-25 | 深圳市友华通信技术有限公司 | Operation expanding structure based on distributed OLT |
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