WO2016106573A1

WO2016106573A1 - Method, device and system for wavelength configuration in passive optical network

Info

Publication number: WO2016106573A1
Application number: PCT/CN2014/095611
Authority: WO
Inventors: 杨素林
Original assignee: 华为技术有限公司
Priority date: 2014-12-30
Filing date: 2014-12-30
Publication date: 2016-07-07
Also published as: CN106170938B; CN106170938A

Abstract

Disclosed is a method for wavelength configuration of a passive optical network (PON). A time division multiplexing (TDM)-PON optical network unit (ONU) and a wavelength division multiplexing (WDM)-PON ONU in the PON are connected through a control interface. The method comprises: the TDM-PON ONU sends a wavelength configuration information request message to a TDM-PON optical line terminal (OLT), the wavelength configuration information request message indicating a request for allocating a wavelength to the WDM-PON ONU; the TDM-PON ONU receives wavelength configuration information from the TDM-PON OLT; and the TDM-PON ONU performs wavelength configuration for the WDM-PON ONU according to the wavelength configuration information. By means of the technical solution provided by embodiments of the present invention, smooth network upgrade of low costs can be realized without deploying an expensive AWG, broadband users of an existing TDM-PON are not affected, and network bandwidth is increased, and meanwhile the problem of wavelength configuration, management and initialization for a WDM-PON ONU is solved.

Description

Method, device and system for wavelength configuration of passive optical network

Technical field

The present invention relates to the field of optical communications, and in particular, to a method, device and system for wavelength configuration of a passive optical network.

Background technique

With the development and maturity of PON (Passive Optical Network) technology, FTTx technology (fiber-to-the-home, fiber-to-the-building, fiber-to-the-road, and other optical access technologies) has begun to be widely used. PON technology has the advantages of low cost, multi-user access, long transmission distance, high transmission bandwidth, etc. It has gradually replaced the existing wired access network with copper wire as the transmission medium, and has become the mainstream development technology of access network technology.

The existing PON is mainly a TDM-PON (Time Division Multiplexing-Passive Optical Network). The TDM-PON uses a single wavelength for both uplink and downlink, and the utilization of the wavelength bandwidth is very low.

In order to solve the problem of wavelength bandwidth utilization, a WDM-PON (Wavelength Division Multiplexing-Passive Optical Network) is proposed. The operating principle of the WDM-PON is that each ONU (Optical Network Unit) occupies one wavelength channel separately, and multiple wavelength channels are transmitted in the same trunk fiber by means of wavelength division multiplexing, so that each ONU is independent. A bandwidth resource of one wavelength greatly expands the total bandwidth of the passive optical network. However, since the wavelengths used by each ONU transceiver module in the WDM-PON are different, this causes the lasers of each ONU transceiver module to be different, and is called a colored optical module in the field of optical communication. The ONU's use of colored light modules can lead to a series of colored problems. For example, the ONUs used by each user are different and cannot be used universally. At the same time, if the ONU uses multiple wavelengths, it will increase the equipment production and storage costs. In order to solve the problem of coloring of ONU, the industry has proposed the concept of WDM-PON colorless light source. The so-called colorless light source means that the ONU transceiver module is wavelength-independent, and the laser emission wavelength of the transceiver module can automatically adapt to the connected AWG (Arrayed Waveguide Grating) or WGR. (Wavelength Grating Router) The port wavelength can be plugged in on any AWG or WGR port. In order to realize a low-cost WDM-PON colorless laser, various solutions have been proposed in the industry, such as injection-locked FP-LD (Fabrec-Perot) laser or RSOA (Reflective Semiconductor Optical Amplifier) based on external seed light injection. Semiconductor amplifiers, wavelength reuse, tunable lasers, self-injection locking or self-seeding lasers. Among them, the tunable laser scheme is the solution with the best prospect.

As the mobile communication rate increases, the density, the number, and the bandwidth of the base station are multiplied, and the cost of the mobile bearer network is required to be lower, and a higher bearer bandwidth can be provided. Operators want to use WDM-PON as a mobile bearer technology to extend bandwidth through wavelength aggregation. However, the WDM-PON needs to deploy an expensive AWG. It requires a relatively large transformation of the existing ODN (Optical Distribution Network) network, and the modified network cannot be compatible with the operation of the deployed TDM-PON. The operator does not want to fully implement the existing deployed TDM-PON, such as GPON (Gigabit Passive Optical Network), EPON (Ethernet Passive Optical Network), 10G GPON, 10G. EPON is being replaced, but it is hoped that smooth upgrades will be made to reduce the impact on existing broadband users.

Summary of the invention

In view of this, the embodiments of the present invention provide a method, a device, and a system for configuring a wavelength of a passive optical network, so as to implement a bandwidth upgrade function based on an existing ODN network through WDM-PON, and solve the wavelength configuration of the WDM-PON. , management and initialization issues.

In a first aspect, an embodiment of the present invention provides a method for configuring a PON wavelength of a passive optical network, where a time division multiplexing TDM-PON optical network unit ONU and a wavelength division multiplexing WDM-PON ONU are controlled. The interface is connected, the method includes: the TDM-PON ONU transmitting a wavelength configuration information request message to the TDM-PON optical line terminal OLT, where the wavelength configuration information request message indicates requesting to allocate a wavelength to the WDM-PON ONU; TDM-PON ONU reception from the TDM-PON OLT Wavelength configuration information; the TDM-PON ONU performs wavelength configuration on the WDM-PON ONU according to the wavelength configuration information.

With reference to the implementation of the first aspect, in a first possible implementation manner of the first aspect, the wavelength configuration information includes a wavelength of a WDM-PON ONU, and the TDM-PON ONU performs the WDM according to the wavelength configuration information. - PON ONU performing wavelength configuration includes: the TDM-PON ONU performs wavelength configuration on the WDM-PON ONU according to the wavelength of the WDM-PON ONU.

With reference to the first aspect, or the first possible implementation manner of the first aspect, in the second possible implementation manner of the first aspect, the wavelength configuration information includes a wavelength configuration relationship table, where the wavelength configuration relationship table includes - wavelength information of all WDM-PON ONUs connected by the PON OLT, the TDM-PON ONU performing wavelength configuration on the WDM-PON ONU according to the wavelength configuration information, including: the TDM-PON ONU obtaining a unique indication of the WDM The identifier of the PON ONU, the wavelength corresponding to the identifier code is obtained from the wavelength configuration relationship table, and the WDM-PON ONU is wavelength configured.

With reference to the first aspect, or any one of the first to the second possible implementations of the first aspect, in the third possible implementation manner of the first aspect, the wavelength configuration information request message carries a unique indication of the WDM An identification code of the PON ONU, the identifier code for requesting a wavelength corresponding to the identification code from the TDM-PON OLT.

With reference to the first aspect, or any one of the foregoing first to third possible implementation manners, in the fourth possible implementation manner of the first aspect, the wavelength configuration information request message carries the indication request and the WDM- A flag bit of wavelength information of all WDM-PON ONUs connected by the PON OLT, the flag bit being used to request wavelength information of all WDM-PON ONUs connected to the WDM-PON OLT to the TDM-PON OLT.

In a second aspect, an embodiment of the present invention provides a method for configuring a PON wavelength of a passive optical network, where the method includes: time division multiplexing TDM-PON optical line terminal OLT receiving an ONU from a TDM-PON optical network unit Wavelength configuration information request message indicating that the request is for wavelength division multiplexing WDM-PON The ONU allocates a wavelength; the TDM-PON OLT sends wavelength configuration information to the TDM-PON ONU, and the wavelength configuration information is used for wavelength configuration of the WDM-PON ONU.

With reference to the implementation of the second aspect, in a first possible implementation manner of the second aspect, the wavelength configuration information includes a wavelength of the WDM-PON ONU.

With reference to the second aspect, or the first possible implementation manner of the second aspect, in the second possible implementation manner of the second aspect, the wavelength configuration information includes a wavelength configuration relationship table, where the wavelength configuration relationship table includes - Wavelength information of all WDM-PON ONUs connected by the PON OLT.

With reference to the second aspect, or any one of the first to the second possible implementation manners of the second aspect, in the third possible implementation manner of the second aspect, the wavelength configuration information request message carries a unique indication of the WDM An identifier of the PON ONU, where the TDM-PON OLT stores a correspondence between the identifier code and the WDM-PON ONU wavelength, and the TDM-PON OLT is the WDM-PON ONU according to the identifier code. Assign wavelengths.

With reference to the second aspect, or any one of the first to third possible implementation manners of the second aspect, in the fourth possible implementation manner of the second aspect, the wavelength configuration information request message carries the indication request and the WDM- a flag bit of wavelength information of all WDM-PON ONUs connected by the PON OLT, the flag bit being used to instruct the TDM-PON OLT to send all the WDM-PONs connected to the WDM-PON OLT to the TDM-PON ONU Wavelength information of the ONU.

With reference to the second aspect, or any one of the second to fourth possible implementation manners, in the fifth possible implementation manner of the second aspect, the TDM-PON OLT receives the wavelength from the TDM-PON ONU After configuring the information request message, it also includes:

After receiving the wavelength configuration information request message, the TDM-PON OLT acquires the wavelength configuration information from a control plane controller.

In a third aspect, an embodiment of the present invention provides a passive optical network PON device, where the passive optical network device includes: a time division multiplexing TDM connected to a wavelength division multiplexing WDM-PON optical network unit ONU through a control interface. a PON ONU; the TDM-PON ONU, configured to send a wavelength configuration information request message to the TDM-PON optical line terminal OLT, where the wavelength configuration information request message indicates requesting to allocate a wavelength to the WDM-PON ONU; the TDM-PON ONU And configured to receive wavelength configuration information from the TDM-PON OLT, and perform wavelength configuration on the WDM-PON ONU according to the wavelength configuration information.

With reference to the implementation of the third aspect, in a first possible implementation manner of the third aspect, the wavelength configuration information includes a wavelength of the WDM-PON ONU, and the TDM-PON ONU is configured to use the wavelength pair The WDM-PON ONU is configured for wavelength configuration.

With reference to the third aspect, or the first possible implementation manner of the third aspect, in a second possible implementation manner of the third aspect, the wavelength configuration information includes a wavelength configuration relationship table, where the wavelength configuration relationship table includes - the wavelength information of all the WDM-PON ONUs connected by the PON OLT; the TDM-PON ONU is configured to obtain an identification code uniquely indicating the WDM-PON ONU, and obtain the corresponding identifier from the wavelength configuration relationship table Wavelength, wavelength configuration of the WDM-PON ONU.

With reference to the third aspect, or any one of the first to the second possible implementation manners of the third aspect, in the third possible implementation manner of the third aspect, the wavelength configuration information request message carries a unique indication that the WDM is An identification code of the PON ONU, the identifier code for requesting the TDM-PON OLT to allocate a wavelength corresponding to the identification code.

With reference to the third aspect, or any one of the third to the third possible implementation manners, in the fourth possible implementation manner of the third aspect, the wavelength configuration information request message carries the indication indication request and the WDM a flag for the wavelength information of all WDM-PON ONUs connected by the PON OLT, the flag bits being used for the TDM-PON OLT Requesting wavelength information of all WDM-PON ONUs connected to the WDM-PON OLT.

In a fourth aspect, an embodiment of the present invention provides a passive optical network PON device, where the passive optical network device includes: a TDM-PON OLT, configured to receive a wavelength configuration information request message from a TDM-PON optical network unit ONU. The wavelength configuration information request message indicates that the request is to allocate a wavelength to the WDM-PON ONU; the TDM-PON OLT is further configured to send wavelength configuration information to the TDM-PON ONU, where the wavelength configuration information is used to WDM-PON ONU performs wavelength configuration.

In conjunction with the implementation of the fourth aspect, in a first possible implementation manner of the fourth aspect, the wavelength configuration information includes a wavelength of the WDM-PON ONU.

With reference to the fourth aspect, or the first possible implementation manner of the fourth aspect, in the second possible implementation manner of the fourth aspect, the wavelength configuration information includes a wavelength configuration relationship table, where the wavelength configuration relationship table includes - Wavelength information of all WDM-PON ONUs connected by the PON OLT.

With reference to the fourth aspect, or any one of the first to the second possible implementation manners of the fourth aspect, in the third possible implementation manner of the fourth aspect, the wavelength configuration information request message carries a unique indication that the WDM is An identifier of the PON ONU, where the TDM-PON OLT stores a correspondence between the identifier code and the WDM-PON ONU wavelength, and the TDM-PON OLT is configured to use the identifier code as the WDM- The PON ONU allocates wavelengths.

With reference to the fourth aspect, or any one of the first to third possible implementation manners of the fourth aspect, in the fourth possible implementation manner of the fourth aspect, the wavelength configuration information request message carries the indication request and the WDM-PON a flag bit of wavelength information of all WDM-PON ONUs connected by the OLT, the flag bit being used to instruct the TDM-PON OLT to send all the WDMs connected to the WDM-PON OLT to the TDM-PON ONU- Wavelength information of the PON ONU.

With reference to the fourth aspect, or any one of the fourth to fourth possible implementation manners, in the fifth possible implementation manner of the fourth aspect, the TDM-PON OLT is configured to receive the wavelength configuration After the information request message, the wavelength configuration information is obtained from the control plane controller.

In a fifth aspect, an embodiment of the present invention provides a passive optical network PON system, in which a time division multiplexing TDM-PON and a wavelength division multiplexing WDM-PON are coupled, and the system includes: TDM-PON light a network unit ONU, configured to send a wavelength configuration information request message to the TDM-PON optical line terminal OLT, where the wavelength configuration information request message indicates that a wavelength is requested to be allocated to the WDM-PON ONU; and the TDM-PON OLT is configured to be used according to the The wavelength configuration information request message is used to send the wavelength configuration information to the TDM-PON ONU. The TDM-PON ONU is configured to receive the wavelength configuration information and perform wavelength configuration on the WDM-PON ONU according to the wavelength configuration information.

With reference to the implementation of the fifth aspect, in a first possible implementation manner of the fifth aspect, the wavelength configuration information includes a wavelength of a WDM-PON ONU, and the TDM-PON ONU is configured to perform the WDM according to the wavelength -PON ONU for wavelength configuration.

With reference to the fifth aspect, or the first possible implementation manner of the fifth aspect, in the second possible implementation manner of the fifth aspect, the wavelength configuration information includes a wavelength configuration relationship table, where the wavelength configuration relationship table includes - the wavelength information of all the WDM-PON ONUs connected by the PON OLT; the TDM-PON ONU is configured to obtain an identification code uniquely indicating the WDM-PON ONU, and obtain the corresponding identifier from the wavelength configuration relationship table Wavelength, wavelength configuration of the WDM-PON ONU.

With reference to the fifth aspect, or any one of the first to the second possible implementation manners of the fifth aspect, in the third possible implementation manner of the fifth aspect, the wavelength configuration information request message carries a unique indication of the WDM An identifier of the PON ONU, where the TDM-PON OLT stores a correspondence between the identifier code and the WDM-PON ONU wavelength, and the TDM-PON OLT is configured to use the identifier code as the WDM- The PON ONU allocates wavelengths.

With reference to the fifth aspect, or any one of the first to third possible implementation manners of the fifth aspect, in the fourth possible implementation manner of the fifth aspect, the wavelength configuration information request message carries the indication request and the WDM- a flag bit of wavelength information of all WDM-PON ONUs connected by the PON OLT, the flag bit being used to instruct the TDM-PON OLT to send all the WDMs connected to the WDM-PON OLT to the TDM-PON ONU - PON ONU wavelength information.

With reference to the fifth aspect, or any one of the fifth to fourth possible implementation manners, in a fifth possible implementation manner of the fifth aspect, the TDM-PON OLT is configured to receive the wavelength configuration After the information request message, the wavelength configuration information is obtained from the control plane controller.

With reference to the fifth aspect, or any one of the fifth to fifth possible implementation manners, in the sixth possible implementation manner of the fifth aspect, the TDM-PON ONU is configured to use the wavelength configuration information Forwarding to the WDM-PON ONU, the WDM-PON ONU is configured to perform wavelength configuration according to the wavelength configuration information.

With reference to the fifth aspect, or any one of the first to sixth possible implementation manners of the fifth aspect, in a seventh possible implementation manner of the fifth aspect, the method further includes: an optical distribution network: a first beam splitter having a splitting ratio smaller than a split ratio of the first beam splitter, the first splitter being connected to the TDM-PON ONU, the second splitter and the second splitter The passive optical network devices of the WDM-PON ONU are connected.

In a sixth aspect, a passive optical network device includes: a processor, a memory, a bus, and a communication interface; the memory is configured to store a computer to execute instructions, and the processor and the memory are connected through a bus, and when the passive optical network device is in operation, processing The computer executing the memory storage executes instructions to cause the passive optical network device to perform the method of any one of the first aspect and the first aspect.

In a seventh aspect, a passive optical network device includes: a processor, a memory, a bus, and a communication interface; the memory is configured to store a computer to execute instructions, and the processor and the memory pass a bus connection, the processor executing a memory-storing computer executing instructions to cause the passive optical network device to perform the method as described in any one of the second aspect and the second aspect, when the passive optical network device is in operation .

According to the technical solution provided by the embodiment of the present invention, the WDM-PON is aggregated on the basis of the TDM-PON, and the wavelength configuration information is provided to the WDM-PON ONU through the TDM-PON ONU, thereby eliminating the need to deploy an expensive AWG and achieving low-cost network smoothing. The upgrade has no impact on the existing TDM-PON broadband users and improves the network bandwidth, and solves the problem of configuring, managing and initializing the WDM-PON ONU wavelength.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments will be briefly described below. Obviously, only a part of the embodiments of the present invention are described in the following drawings, and other drawings or drawings may be obtained according to the drawings and descriptions without any creative work by those skilled in the art. The embodiments are intended to cover all such derived figures or embodiments.

1 is a schematic structural diagram of a time division multiplexing and wavelength division multiplexing passive optical network system implementing an embodiment of the present invention;

2 is a schematic structural view of a spectroscope embodying an embodiment of the present invention;

3 is a schematic structural diagram of an HPON ONU of an aggregate passive optical network optical network unit according to an embodiment of the present invention;

4 is a signaling interaction diagram of a wavelength configuration method for implementing an embodiment of the present invention;

FIG. 5 is a signaling interaction diagram of another wavelength configuration method for implementing an embodiment of the present invention; FIG.

FIG. 6 is a schematic structural diagram of another hybrid passive optical network optical network unit HPON ONU implementing the embodiment of the present invention; FIG.

7 is a signaling interaction diagram of a wavelength configuration method for implementing an embodiment of the present invention;

8 is an exemplary flowchart of a method for implementing PON wavelength configuration of a passive optical network according to an embodiment of the present invention;

9 is an exemplary flowchart of a method for implementing PON wavelength configuration of a passive optical network according to an embodiment of the present invention;

10 is a schematic diagram showing the logical structure of a passive optical network PON device that implements an embodiment of the present invention;

11 is a schematic diagram showing the logical structure of a passive optical network PON device that implements an embodiment of the present invention;

12 is a schematic diagram showing the logical structure of a passive optical network PON device that implements an embodiment of the present invention;

FIG. 13 is a schematic diagram showing the logical structure of a passive optical network PON device according to an embodiment of the present invention; FIG.

FIG. 14 is a schematic diagram showing the logical structure of a passive optical network PON system implementing an embodiment of the present invention; FIG.

FIG. 15 is a schematic diagram showing the logical structure of a computer device for implementing a passive optical network PON according to an embodiment of the present invention.

detailed description

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. It is apparent that the described embodiments are only a part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

Embodiment 1

FIG. 1 is a schematic structural diagram of a time division multiplexing and wavelength division multiplexing passive optical network system according to an embodiment of the invention. In the system, the central office CO (Central Office) includes a TDM-PON OLT 101, a WDM-PON OLT 102, and a wavelength division multiplexing/demultiplexing device 103; the optical distribution network ODN includes a beam splitter 104; and the user side includes a TDM-PON ONU 105 and HPON ONU (Hybrid PON ONU) (1061, 1062). Specifically, the TDM-PON OLT 101 can be a GPON OLT, an EPON OLT, an XGPON OLT, etc. deployed in an existing network. Accordingly, the TDM-PON ONU 105 is also a GPON ONU, an EPON ONU, an XGPON ONU, etc. deployed in the existing network. Network upgrade, TDM-PON ONU105 is an optional device in the system that can be replaced by HPON ONU. The HPON ONU (1061, 1062) is an upgraded network device proposed in the embodiment of the present invention. In the PON system, multiple TDM-PON ONUs or HPON ONUs may exist.

Specifically, the network layer includes a control plane and a data plane, wherein the control plane is used to control and manage the operation of all network protocols, such as management of spanning tree protocols, VLAN protocols, ARP protocols, various routing protocols, and multicast protocols. control. The control plane provides various network information and forwarding query entries that are necessary before data plane data processing and forwarding. The data plane is mainly used to process and forward various types of data on different ports. For specific processing and forwarding processes in the data processing process, such as L2/L3/ACL/QOS/multicast/security protection, etc. process. The TDM-PON OLT 101 provides a physical or logical interface to the control plane. Optionally, there is a physical or logical interface between the TDM-PONOLT 101 and the WDM-PON OLT 102. The control plane transmits the wavelength configuration or management information of the WDM-PON optical transceiver function unit to the TDM-PON OLT 101 through the interface between the control plane and the TDM-PON OLT 101, and further, between the TDM-PON OLT 101 and the WDM-PON OLT 102 The interface transmits the wavelength configuration or management information of the WDM-PON optical transceiver function unit. The control plane can also monitor the WDM-PON optical transceiver function unit through the interface between the control plane and the TDM-PON OLT 101, and the interface between the TDM-PON OLT 101 and the WDM-PON OLT 102, such as the transmit power of the optical transceiver function unit. The received power of the optical transceiver function unit and the temperature of the optical transceiver function unit. The WDM-PON OLT 102 has at least one physical or logical interface connected to the data plane of the network for transmitting various types of data information. The WDM-PON OLT 102 can be a switch with an optical interface or other network communication device, such as a radio base station controller. WDM-PON OLT102 An optical interface is provided to be inserted into the optical transceiver function unit, and the wavelength configuration of the WDM-PON optical transceiver function unit in the WDM-PON OLT 102 is required. The specific implementation includes two types: one implementation manner is that the WDM-PON OLT independently manages the wavelength. The configuration information is stored in the WDM-PON OLT. The WDM-PON OLT 102 performs wavelength configuration on the optical transceiver function unit inserted into the WDM-PON OLT 102 according to the port number of the optical interface. In another implementation manner, the wavelength configuration information is stored in the control plane. The WDM-PON OLT 102 obtains the wavelength configuration information from the control plane through the TDM-PON OLT 101, and performs wavelength configuration on the optical transceiver function unit inserted in each optical interface of the WDM-PON OLT 102 according to the wavelength configuration information. In the downlink direction, the wavelength division multiplexing/demultiplexing unit 103 is configured to multiplex the WDM-PON downlink wavelength signal and the TDM-PON downlink wavelength signal onto the trunk optical fiber; in the uplink direction, the wavelength division multiplexing/demultiplexing device 103 The backbone optical fiber demultiplexing obtains the TDM-PON upstream wavelength signal and the WDM-PON upstream wavelength signal.

In GPON or XGPON deployed on the current network, the splitter generally adopts a 1:32 or 1:64 split ratio, that is, a GPON OLT or XGPON OLT connects 32 or 64 ONUs through the ODN network. In the existing network, the network opening rate of an OND network connecting 32 or 64 ONUs is difficult to reach 100%. Therefore, the existing OND network can be modified to be compatible with the operation of the GPON or XGPON network in the existing network, and can support the carrying and deployment of the existing or future wireless network. In Fig. 1, a 1:64 primary optical splitter is taken as an example, and other stages and splitting ratio splitters are similarly implemented. The splitter on the ODN in the existing network is a 1:64 splitter 1041, including a

common port

100 and 64 branch ports (1, 2, ..., 64). The optical splitter 104 of the embodiment of the present invention adds a 1:4 splitter 1042 and a plurality of wavelength division multiplexing/demultiplexing devices (1043, 1044, 1045), which are completed by the wavelength division multiplexing/demultiplexing device 1043. The wavelength multiplexing/demultiplexing of the common port 100 of the splitter 1041 and the common port 200 of the splitter 1042. The implementation manner of the added optical splitter 1042 is not limited thereto, and the setting principle is: smaller than the split ratio of the optical splitter in the existing network ODN, and may include one or more, similar to the optical splitter 1042 shown in FIG. Connect to an existing ODN. Each branch port of the splitter 1042 is coupled to the split by a wavelength division multiplexing/demultiplexer Any one of the branch ports of the device 1041, for example, the branch port 1 of the splitter 1042 is connected to the port 20 of the splitter 1041, and the branch port 4 of the splitter 1042 is connected to the port 64 of the splitter 1041. Further, the branch port of the optical splitter 1041 connected to the optical splitter 1042 is connected to the HPON ONU of the passive optical network system. Thus, the downlink WDM-PON wavelength signal is passed through the wavelength division multiplexing/demultiplexing device 1043, demultiplexed to the common port 200, split by 1:4, and then recovered by the wavelength division multiplexing/

demultiplexing device

1044 or 1045. The branch fiber is used; the downlink GPON or XGPON wavelength signal is demultiplexed to the common port 100 by the wavelength division multiplexing/demultiplexing device 1043, and then split by 1:64, and then passed through the wavelength division multiplexing/demultiplexing device. 1044 or 1045 is multiplexed into the branch fiber, or the downstream GPON or XGPON wavelength signal is transmitted on other branch fibers after 1:64 splitting, such as port 1.

FIG. 2 is a schematic structural diagram of a beam splitter 104 in another embodiment of upgrading an optical splitter in an existing network. The industry usually uses 1:2 ^N or 2:2 ^N (N is a positive integer, N=1, 2, 3, ...) split ratio, also takes the 1:64 first-order splitter as an example, assuming that it is in the live network. On the ODN is a 1:64 splitter, which can be replaced with the splitter 104 shown in Figure 4 for a 1:64 splitter. In FIG. 2, the split ratios of the

beamsplitters

1046, 1047, and 1048 are 1:2, 1:32, and 1:4, respectively, and the arrangement of the splitter split ratio and the number of stages is only one of them, and is not limited thereto. The split ratio of the first to the 32th branch ports of the beam splitter 1047 is still 1:64, and the split ratio of the 33rd to 36th branch ports is 1:8. In the specific implementation process, the attenuation of the transmission signal through the 1:8 splitter is smaller than that of the 1:64 optical splitter. Therefore, the HPON ONU can be connected through the 33 to 36 branch ports to provide bandwidth service data. In this embodiment, the optical splitter 104 is set to be a splitter of two or more levels, wherein at least one splitter has a split ratio that is smaller than that of the other splitters.

The HPON ONU (1061, 1062) is a novel ONU disclosed in the embodiment of the present invention, which is connected to the time division multiplexing and wavelength division multiplexing passive optical network system by the manner shown in FIG. Specifically, if the optical splitter is implemented as shown in FIG. 1, the HPON ONU (1061, 1062) is connected to the branch of the optical splitter 1042 and the optical splitter 1041 connected by the wavelength division multiplexing/demultiplexing device (1044, 1045). On the fiber that is led out by the port; if the splitter is In the implementation shown in Figure 2, the HPON ONU (1061, 1062) is connected to the fiber from the branch port of the splitter 1048. After the wavelength signal passes through the splitter with a small splitter, the loss of the link is low, which reduces the performance requirement of the HPON ONU.

In the embodiment of the present invention, the WDM-PON is deployed on the existing ODN network, and the existing network is smoothly upgraded at a low cost, and the bandwidth of the network is improved, and the optical splitter with relatively small splitting is set in the existing ODN. The link loss is lower, and the upgraded network is compatible with the existing network without adversely affecting existing broadband users.

Embodiment 2

FIG. 3 is a schematic structural diagram of an HPON ONU of an aggregate passive optical network optical network unit according to an embodiment of the invention.

In the specific implementation process, the HPON ONU includes a TDM-PON optical transceiver function unit 301, a TDM-PON ONU 302, a WDM-PON optical transceiver function unit 303, a WDM-PON ONU 304, and a wavelength division multiplexing/demultiplexer 305. The user-side interfaces UNI-1 and UNI-2 on the HPON ONU are connected to terminal devices such as PCs through twisted pair or other types of media. Specifically, the TDM-PON optical transceiver function unit 301 and the TDM-PON ONU 302 may be TDM-PON devices deployed in the existing network. The WDM-PON optical transceiver function unit 303 is an optical transceiver device having an optical transceiver function.

The TDM-PON ONU 302 is connected to the WDM-PON ONU 304 through the control interface CI and transmits the wavelength configuration information to the WDM-PON ONU 304. Specifically, the receiving wavelength and the transmission wavelength configuration information of the WDM-PON optical transceiver function unit 303 may be included, WDM- The PON ONU304 can also transmit information such as the on/off status of the optical transceiver function unit through the control interface. The TDM-PON ONU 302 can also collect monitoring information of the WDM-PON optical transceiver function unit 303 or the WDM-PON ONU 304 through the control interface CI, such as transmitting optical power, receiving optical power, and the like. The TDM-PON optical transceiver function unit 301 and the WDM-PON optical transceiver function unit 303 can be independent modules. In this case, the TDM-PON optical transceiver function unit 301 is inserted into the optical interface of the TDM-PON ONU 302, and the WDM-PON light is used. Transceiver function unit 303 is inserted into the light of WDM-PON ONU 304 In the interface, the TDM-PON optical transceiver function unit 301 is a functional module integrated on the TDM-PON ONU 302, and the WDM-PON optical transceiver function unit 303 is a functional module integrated on the WDM-PONONU 304. The wavelength division multiplexing/demultiplexing device 305 can be a separate module or integrated into the WDM-PON optical transceiver function unit 303 or the WDM-PON ONU 304. At this time, the WDM-PON optical transceiver function unit 303 or the WDM-PON ONU 304 It has two interfaces, one is connected to the fiber, and finally connected to the OLT, and the other interface is the control interface, which is connected to the TDM-PON ONU302. The wavelength division multiplexing/demultiplexing unit 305 is used to multiplex/demultiplex the wavelength signal of the TDM-PON and the wavelength signal of the WDM-PON. Specifically, in the uplink direction, the wavelength division multiplexing/demultiplexing device 305 The TDM-PON wavelength signal and the WDM-PON wavelength signal are combined to output the TDM-PON wavelength signal and the WDM-PON wavelength signal; in the downlink direction, the wavelength division multiplexing/demultiplexer 305 demultiplexes the TDM-PON The wavelength signal and the WDM-PON wavelength signal are separately transmitted to the TDM-PON optical transceiver function unit 301 and the WDM-PON optical transceiver function unit 303 by dividing the TDM-PON wavelength signal and the WDM-PON wavelength signal.

If the embodiment of the present invention uses the HPON ONU as shown in FIG. 3 as the ONU of the time division multiplexing and the wavelength division multiplexing passive optical network, the signaling interaction diagram of the wavelength configuration method of the passive optical network in the embodiment of the present invention is as follows. Figure 4 shows:

S401: The TDM-PON ONU registers with the TDM-PON OLT to go online.

The TDM-PON ONU registers with the TDM-PON OLT to complete the configuration of the TDM-PON ONU. Specifically, if the TDM-PON ONU is a GPON ONU, the registration activation of the ONU may be completed by using an activation process conforming to the G.984.3 standard, and may include an ONU ID (ONU Identifier, ONU identifier) allocation, authentication, and may also include an OMCI ( The configuration of the ONU Management and Control Interface (ONU), management and control interface, such as the configuration of the ME (Management Entity) of the UNI interface, and the VLAN (Virtual Local Area Network) binding.

S402: The TDM-PON ONU obtains an identifier that uniquely indicates the WDM-PON ONU.

The identification code that uniquely indicates the WDM-PON ONU may include the WDM-PON ONU The identification code or the identification code of the WDM-PON optical transceiver function unit may further include an identifier of the TDM-PON ONU for providing wavelength configuration information for the WDM-PON ONU or an identification code of the TDM-PON optical transceiver function unit. Specifically, the obtained identification code can uniquely indicate a WDM-PON ONU or a WDM-PON optical transceiver function unit that needs to be configured with wavelength information, including but not limited to: SN (Serial Number) of the WDM-PON ONU and/or MAC (Media Access Control) address; SN of WDM-PON optical transceiver function unit; SN, MAC address, LLID (Logical Link Identifier), LOID (Logical ONU Identifier) of TDM-PON ONU At least one of the logical ONU identifier, the ONU ID (ONU Identifier, ONU identifier); the SN of the TDM-PON optical transceiver function unit. Specifically, the TDM-PON ONU obtains the identification code of the WDM-PON ONU or the WDM-PON optical transceiver function unit, and includes two implementation modes: one is, the TDM-PON ONU detects whether the WDM-PON ONU is powered on through the control interface CI. Status, if the WDM-PON ONU is detected to be powered on, read the identification code of the WDM-PON ONU or WDM-PON optical transceiver function unit. In another implementation manner, the TDM-PON ONU does not need to detect whether the WDM-PON ONU is powered on, but when the WDM-PON ONU detects that it is powered on, directly sends the WDM-PON ONU or WDM to the TDM-PON ONU. - The identification code of the PON optical transceiver function unit.

S403: The TDM-PON ONU sends an identifier that uniquely indicates the WDM-PON ONU to the TDM-PON OLT.

The TDM-PON ONU sends an identification code uniquely indicating the WDM-PONONU to the TDM-PON OLT, requesting to allocate wavelength information corresponding to the transmitted identification code.

S404: The TDM-PON OLT forwards the identification code uniquely indicating the WDM-PON ONU to the control plane controller.

Specifically, the TDM-PON OLT forwards the identification code of the WDM-PON ONU that is required to be configured with the wavelength information to the control plane controller, and requests the wavelength of the WDM-PON ONU corresponding to the identifier.

S405: The control plane controller sends the wavelength configuration information to the TDM-PON OLT.

In one embodiment, the control plane controller allocates a wavelength to the WDM-PON ONU according to a wavelength configuration relationship table that uniquely indicates the WDM-PON ONU and the WDM-PON ONU stored in the control plane, and sends the allocated wavelength. Give TDM-PON OLT. Specifically, the wavelength configuration relationship table of the WDM-PON ONU includes the identifier of the WDM-PON ONU that is uniquely indicated by the same WDM-PON OLT, and the wavelength of the corresponding WDM-PON ONU. The wavelength configuration information sent by the control plane controller includes the wavelength corresponding to the identifier, and may also include an identifier.

In another embodiment, when the wavelength configuration relationship table of the WDM-PON ONU is written by the controller of the control plane to the TDM-PON OLT, and the wavelength configuration relationship table of the WDM-PON ONU is stored on the TDM-PON OLT, S404 And S405 is an optional step, and the TDM-PON OLT can allocate a corresponding wavelength to the WDM-PON ONU according to the identification code and the wavelength configuration information that directly indicates the WDM-PON ONU, and generate wavelength configuration information including the wavelength information, without The identification code uniquely indicating the WDM-PON ONU is forwarded to the control plane controller.

In the above embodiment, the wavelength configuration relationship table of the WDM-PON ONU includes the identification code uniquely indicating the WDM-PON ONU under the same WDM-PON OLT, and the wavelength of the corresponding WDM-PON ONU.

S406: The TDM-PON OLT forwards the wavelength configuration information to the TDM-PON ONU.

Specifically, the wavelength configuration information includes the allocated wavelength information.

S407: The TDM-PON ONU forwards the wavelength configuration information to the WDM-PON ONU.

The TDM-PON ONU forwards the wavelength configuration information to the WDM-PON ONU, and the WDM-PON ONU sets the transmission wavelength of the tunable laser in the WDM-PON optical transceiver function unit according to the wavelength information in the wavelength configuration information, and/or the tunable receiver Receiving wavelength.

FIG. 5 is a signaling interaction diagram of another implementation manner of the above wavelength configuration methods S401-S407, and the specific implementation process is as follows:

S501: The TDM-PON ONU is registered to go online, and the wavelength configuration relation table is requested.

When the TDM-PON ONU is registered to go online, a request message carrying a specific flag bit is sent to the TDM-PON OLT to request a wavelength configuration relationship table of the WDM-PON ONU. Specifically, in the GPON, the TDM-PON ONU sends a specific flag to the TDM-PON OLT through a PLOAM (Physical Layer Operations, Administration and Maintenance) message or an OMCI message, or The format of the message can be customized.

Specifically, the wavelength configuration relationship table of the WDM-PON ONU includes the identifier of the WDM-PON ONU that is uniquely indicated by the same WDM-PON OLT, and the wavelength of the corresponding WDM-PON ONU.

S502: The TDM-PON OLT requests a wavelength configuration relationship table from the control plane controller.

Specifically, the TDM-PON OLT forwards a request message carrying a specific flag to the control plane controller, and requests a wavelength configuration relationship table of the WDM-PON ONU.

S503: The control plane controller sends the wavelength configuration information to the TDM-PON OLT.

The wavelength configuration information is specifically a wavelength configuration relationship table. The wavelength configuration table of the WDM-PON ONU can be saved in the control plane or in the TDM-PON OLT. When the wavelength configuration relationship table is stored in the TDM-PON OLT, S502 and S503 are optional steps. The TDM-PON OLT can directly send the wavelength configuration relationship table to the TDM-PON ONU without controlling the control plane. The device requests a wavelength configuration relationship table of the WDM-PON ONU.

S504: The TDM-PON OLT sends the wavelength configuration information to the TDM-PON ONU.

S502-S504 may be completed in the S501 registration online phase, or after the S501 registration is online.

S505: The TDM-PON ONU performs wavelength configuration on the WDM-PON ONU.

Specifically, when the TDM-PON ONU detects that the WDM-PON ONU is powered on by the control interface CI, the TDM-PON ONU performs wavelength configuration on the WDM-PON ONU. The TDM-PON ONU can perform the step S402. Obtained The identification code of the WDM-PON ONU that indicates the wavelength information to be configured, obtains the wavelength allocated to the WDM-PON ONU according to the identification code, and transmits the allocated wavelength information to the WDM-PON ONU, and the WDM-PON ONU sets according to the allocated wavelength. WDM-PON optical transceiver function unit tunable laser transmission wavelength, and / or tunable receiver receiving wavelength; another implementation manner, TDM-PON ONU sends the wavelength configuration relationship table directly to WDM-PON ONU, WDM - PON ONU obtains its own assigned wavelength according to the correspondence between the identification code and the wavelength of the WDM-PON ONU in the wavelength configuration relationship table, and sets the transmission wavelength of the tunable laser of the WDM-PON optical transceiver function unit, and/or is adjustable. Receiver wavelength of the receiver.

After the WDM-PON optical transceiver function unit is configured with the wavelength information, the WDM-PON ONU can send a configuration success message to the WDM-PON OLT, and use the configured wavelength for service data transmission.

According to the technical solution provided by the embodiment of the present invention, the WDM-PON is aggregated on the basis of the TDM-PON, and the TDM-PON ONU obtains the wavelength configuration information, and sends the WDM-PON ONU through the control interface, and the WDM-PON ONU to the WDM-PON The optical transceiver function unit performs wavelength configuration, which has no impact on the existing TDM-PON broadband users, and the low-cost network is smoothly upgraded, which improves the network bandwidth and solves the problem of configuring, managing, and initializing the WDM-PON wavelength.

Embodiment 3

FIG. 6 is another schematic structural diagram of a passive optical network optical network unit HPON ONU according to an embodiment of the present invention, which is another implementation manner of FIG. 3. Specifically, the TDM-PON optical transceiver function unit 301, the TDM-PON ONU 302, and the WDM-PON optical transceiver function unit 303 shown in FIG. 3 are integrated into an independent optical transceiver function unit 600. The optical transceiver function unit 600 can be an independent module or a function module with an optical signal transceiving function on the WDM-PON ONU601 board. If a separate module exists, the standard electrical interface can be plugged into a common optical port switch, and the WDM-PON ONU device does not need to be redesigned. The system performs a smooth upgrade. The optical transceiver function unit 600 includes a TDM-PON ONU 602, a WDM-PON optical transceiver function unit 603, and a wavelength division multiplexing/demultiplexer 604. The TDM-PON ONU 602 integrates a TDM-PON optical transceiver function unit, which is optional. The TDM-PON optical transceiver function unit can also be an independent optical transceiver function unit.

Specifically, the TDM-PON optical transceiver function unit in the TDM-PON ONU 602 implements reception, transmission, and processing of signals of the TDM-PON, and provides monitoring information, configuration, or management information for the optical transceiver function unit 600. The monitoring information includes information such as the size of the transmitted optical power, the size of the received optical power, and the temperature. The configuration or management information may be the wavelength configuration information, and specifically includes the transmission wavelength and the receiving wavelength configuration information of the WDM-PON optical transceiver function unit 603. The TDM-PON ONU 602 sets the transmission of the tunable laser on the WDM-PON optical transceiver function unit 603 through the control interface between the TDM-PON ONU 602 and the WDM-PON optical transceiver function unit 603 according to the wavelength configuration information transmitted by the TDM-PON OLT. Information such as the wavelength, and/or the receiving wavelength of the tunable receiver.

If the embodiment of the present invention adopts the HPON ONU as shown in FIG. 6 as the ONU of the time division multiplexing and the wavelength division multiplexing passive optical network, the signaling interaction diagram of the wavelength configuration method of the passive optical network in the embodiment of the present invention is as follows. Figure 7 shows:

S701: The TDM-PON ONU is registered for online.

The TDM-PON ONU completes activation or registration with the TDM-PON OLT and begins to communicate with the TDM-PON OLT.

S702: The TDM-PON ONU sends a wavelength configuration information request message to the TDM-PON OLT.

Specifically, the TDM-PON ONU carries the identifier of the WDM-PON ONU that is required to be configured with the wavelength information to be carried in the wavelength configuration information request message, and requests the TDM-PON OLT to allocate the identifier code carried in the wavelength configuration information request message. The wavelength. An embodiment of the TDM-PON ONU that obtains the identification code of the WDM-PON ONU that is required to be configured with the wavelength information is described in detail in S402, and details are not described herein again. Optionally, after S702, the TDM-PON OLT can further control The plane controller sends a wavelength configuration information request message, and obtains wavelength configuration information from the control plane controller.

S703: The TDM-PON OLT sends the wavelength configuration information to the TDM-PON ONU.

After receiving the wavelength configuration information, the TDM-PON ONU can set the transmission wavelength of the tunable laser of the WDM-PON optical transceiver function unit through the TDM-PON ONU internal control unit according to the wavelength information contained in the wavelength configuration information, and/or can be adjusted. Transceiver wavelength of the receiver.

After the tunable laser and the tunable receiver are set to operate at a working wavelength, the optical transceiver function unit 600 sends a status indication to the WDM-PON ONU, indicating that the optical transceiver function unit 600 can work normally. The status indication can be indicated by a status register or by a hardware signal.

Optionally, another implementation manner of the embodiment of the present invention is to send a request message carrying a specific flag bit to the TDM PON OLT through the TDM-PON ONU to request a wavelength configuration relationship table of the WDM-PON ONU, and a wavelength configuration relationship table. The identifier of the WDM-PON ONU that is uniquely indicated by the same WDM-PON OLT and the wavelength of the corresponding WDM-PON ONU are included in the same WDM-PON OLT. The TDM-PON ONU performs the method as described in S402 to obtain the identification code of the WDM-PON ONU that directly indicates the wavelength information to be configured, obtains the corresponding wavelength information according to the identification code, and sets the WDM-PON light through the TDM-PON ONU internal control unit. The transmitting and receiving functional unit tunable laser transmission wavelength, and / or adjustable receiver transceiver wavelength.

After the WDM-PON optical transceiver function unit is configured with the wavelength information, the WDN-PONONU can send a configuration success message to the WDM-PON OLT, and use the configured wavelength for service data transmission.

According to the technical solution provided by the embodiment of the present invention, the WDM-PON is aggregated on the basis of the TDM-PON, and the wavelength configuration information is obtained through the TDM-PON ONU, and the TDM-PON ONU performs wavelength configuration on the WDM-PON optical transceiver function unit through the control interface. , to achieve no impact on the existing TDM-PON broadband users, low-cost network smooth upgrade, mention Increased network bandwidth while addressing the issue of configuration, management, and initialization of WDM-PON wavelengths.

Embodiment 4

FIG. 8 is an exemplary flowchart of a method for PON wavelength configuration of a passive optical network according to an embodiment of the invention. The method can be implemented by the HPON ONU shown in FIG. 3 or FIG. 6 , wherein the time division multiplexing TDM-PON optical network unit ONU and the wavelength division multiplexing WDM-PON ONU in the PON are connected through a control interface, and the following steps are included. :

S801: The TDM-PON ONU sends a wavelength configuration information request message to the TDM-PON optical line terminal OLT, where the wavelength configuration information request message indicates that the wavelength is requested to be allocated to the WDM-PON ONU.

In the specific implementation process, the wavelength configuration information request message carries an identifier that uniquely indicates the WDM-PON ONU, to request the TDM-PON OLT to select a wavelength corresponding to the identifier of the WDM-PON ONU, or a wavelength configuration information request message. The flag bit indicating the request wavelength configuration relationship table is carried to request a wavelength configuration relationship table from the TDM-PON OLT.

S802: The TDM-PON ONU receives wavelength configuration information from the TDM-PON OLT.

S803: The TDM-PON ONU performs wavelength configuration on the WDM-PON ONU according to the wavelength configuration information.

Specifically, the wavelength configuration information includes a wavelength of the WDM-PON ONU, and the TDM-PON ONU performs wavelength configuration on the WDM-PON ONU according to the wavelength of the WDM-PON ONU; or the wavelength configuration information includes a wavelength configuration relationship table, and the wavelength configuration relationship table includes The WDM-PON ONU identifies the wavelength corresponding to the WDM-PON ONU and the identification code of the WDM-PON ONU. The TDM-PON ONU obtains the corresponding wavelength according to the identification code of the WDM-PON ONU. The ONU performs wavelength configuration.

According to the technical solution provided by the embodiment of the present invention, aggregation is performed on the basis of TDM-PON WDM-PON, which provides wavelength configuration information to WDM-PON ONU through TDM-PON ONU, eliminates the need to deploy expensive AWGs, achieves low-cost network smooth upgrade, has no impact on existing TDM-PON broadband users and improves network bandwidth. At the same time, solve the problem of configuration, management and initialization of WDM-PON ONU wavelength.

Embodiment 5

FIG. 9 is an exemplary flowchart of a method for PON wavelength configuration of a passive optical network according to an embodiment of the invention. The method can be executed by the OLT, and includes the following steps:

S901: The time division multiplexing TDM-PON optical line terminal OLT receives a wavelength configuration information request message from the TDM-PON optical network unit ONU, where the wavelength configuration information request message indicates that the wavelength is allocated to the wavelength division multiplexing WDM-PON ONU;

In the specific implementation process, the wavelength configuration information request message carries an identifier that uniquely indicates the WDM-PON ONU, and the TDM-PON OLT allocates a wavelength corresponding to the identifier that uniquely indicates the WDM-PON ONU. Alternatively, the wavelength configuration information request message carries a flag indicating the request wavelength configuration relationship table, and the flag indicating that the request wavelength configuration relationship table indicates that the TDM-PON OLT sends the wavelength configuration relationship table to the TDM-PON ONU.

S902: The TDM-PON OLT sends wavelength configuration information to the TDM-PON ONU, where the wavelength configuration information is used to perform wavelength configuration on the WDM-PON ONU.

Specifically, the wavelength configuration information includes a wavelength of the WDM-PON ONU, or the wavelength configuration information includes a wavelength configuration relationship table, where the wavelength configuration relationship table includes identifiers and WDMs of all WDM-PON ONUs connected to the WDM-PON OLT. The wavelength corresponding to the identification code of the PON ONU.

According to the technical solution provided by the embodiment of the present invention, the WDM-PON is aggregated on the basis of the TDM-PON, and the wavelength configuration information is sent to the TDM-PON ONU through the TDM-PON OLT, and the wavelength configuration information is used to perform wavelength on the WDM-PON ONU. Configuration, no need to deploy expensive AWG, achieve low-cost network smooth upgrade, for existing TDM-PON Broadband users have no impact and increase network bandwidth while addressing the issue of configuring, managing, and initializing WDM-PON ONU wavelengths.

Embodiment 6

FIG. 10 is a schematic diagram showing the logical structure of a passive optical network device according to an embodiment of the invention. As shown in FIG. 10, the passive optical network device is specifically a time division multiplexed TDM-PON ONU1001, and the TDM-PON ONU1001 is connected to the wavelength division multiplexing WDM-PON optical network unit ONU1002 through a control interface.

The TDM-PON ONU 1001 is configured to send a wavelength configuration information request message to the TDM-PON optical line terminal OLT, where the wavelength configuration information request message indicates that the wavelength is allocated to the WDM-PON ONU 1002.

In the specific implementation process, the wavelength configuration information request message carries an identifier that uniquely indicates the WDM-PON ONU 1002, to request a wavelength corresponding to the identifier that uniquely indicates the WDM-PON ONU 1002 to the TDM-PON OLT, or a wavelength configuration information request message. The flag bit indicating the request wavelength configuration relationship table is carried to request a wavelength configuration relationship table from the TDM-PON OLT.

The TDM-PON ONU 1001 is further configured to receive wavelength configuration information from the TDM-PON OLT, and perform wavelength configuration on the WDM-PON ONU 1002 according to the wavelength configuration information.

Specifically, the wavelength configuration information includes the wavelength of the WDM-PON ONU 1002, and the TDM-PON ONU 1001 performs wavelength configuration on the WDM-PON ONU 1002 according to the wavelength of the WDM-PON ONU 1002; or the wavelength configuration information includes a wavelength configuration relationship table, and the wavelength configuration relationship table includes The wavelength configuration relationship table includes the WDM-PON ONU1002 identification code and the WDM-PON ONU1002 identification code corresponding to the WDM-PON OLT. The TDM-PON ONU1001 obtains the unique indication WDM according to the identification code of the WDM-PON ONU1002. - The wavelength corresponding to the identification code of the PON ONU1002, and the wavelength configuration of the WDM-PON ONU1002.

FIG. 11 is a schematic diagram showing the logical structure of a passive optical network device according to an embodiment of the invention. As shown in FIG. 11, the passive optical network device includes:

The wavelength configuration information request message sending unit 1101 is configured to send a wavelength configuration information request message to the TDM-PON optical line terminal OLT, where the wavelength configuration information request message indicates that the wavelength is requested to be allocated to the WDM-PON ONU;

The wavelength configuration information receiving unit 1102 is further configured to receive wavelength configuration information from the TDM-PON OLT, and perform wavelength configuration on the WDM-PON ONU according to the wavelength configuration information.

According to the technical solution provided by the embodiment of the present invention, the WDM-PON is aggregated on the basis of the TDM-PON, and the wavelength configuration information is sent to the TDM-PON ONU through the TDM-PON OLT, and the TDM-PON ONU configures the wavelength of the WDM-PON ONU. No need to deploy expensive AWGs, achieve low-cost network smooth upgrade, no impact on existing TDM-PON broadband users and improve network bandwidth, while solving the problem of WDM-PON ONU wavelength configuration, management and initialization.

Example 7

FIG. 12 is a schematic diagram showing the logical structure of a passive optical network device according to an embodiment of the invention. As shown in FIG. 12, the passive optical network device is specifically TDM-PON OLT1201:

The TDM-PON OLT 1201 is configured to receive a wavelength configuration information request message from the TDM-PON optical network unit ONU 1202, where the wavelength configuration information request message indicates that a wavelength is requested to be allocated to the WDM-PON ONU.

In the specific implementation process, the wavelength configuration information request message carries an identifier that uniquely indicates the WDM-PON ONU, and the TDM-PON OLT 1201 allocates a wavelength corresponding to the identification code that uniquely indicates the WDM-PON ONU. Alternatively, the wavelength configuration information request message carries a flag indicating the request wavelength configuration relationship table, and the flag indicating that the request wavelength configuration relationship table indicates that the TDM-PON OLT 1201 sends the wavelength configuration relationship table to the TDM-PON ONU 1202.

The TDM-PON OLT 1201 is further configured to send wavelength configuration information to the TDM-PON ONU 1202, where the wavelength configuration information is used for wavelength configuration of the WDM-PON ONU.

FIG. 13 is a schematic diagram showing the logical structure of a passive optical network device according to an embodiment of the invention. As shown in FIG. 13, the passive optical network device includes:

The wavelength configuration information request message receiving unit 1301 is configured to receive a wavelength configuration information request message from the TDM-PON optical network unit ONU, where the wavelength configuration information request message indicates that the wavelength is requested to be allocated to the WDM-PON ONU;

The wavelength configuration information sending unit 1302 is further configured to send wavelength configuration information to the TDM-PON ONU, where the wavelength configuration information is used to perform wavelength configuration on the WDM-PON ONU.

According to the technical solution provided by the embodiment of the present invention, the WDM-PON is aggregated on the basis of the TDM-PON, and the wavelength configuration information is sent to the TDM-PON ONU through the TDM-PON OLT, and the wavelength configuration information is used to perform wavelength on the WDM-PON ONU. Configuration, no need to deploy expensive AWG, achieve low-cost network smooth upgrade, no impact on existing TDM-PON broadband users and improve network bandwidth, while solving the problem of WDM-PON ONU wavelength configuration, management and initialization .

Example eight

FIG. 14 is a schematic diagram showing the logical structure of a passive optical network system according to an embodiment of the invention. As shown in FIG. 14, in the system, a time division multiplexing TDM-PON and a wavelength division multiplexing WDM-PON are coupled, and the system includes:

The TDM-PON optical network unit ONU 1401 is configured to send a wavelength configuration information request message to the TDM-PON optical line terminal OLT 1402, where the wavelength configuration information request message indicates that the wavelength is allocated to the WDM-PON ONU 1403.

Optionally, the TDM-PON OLT 1402 is configured to connect to the control plane controller, send a wavelength configuration information request message to the control plane controller, and receive wavelength configuration information from the control plane controller.

In the specific implementation process, the wavelength configuration information request message carries an identifier that uniquely indicates the WDM-PON ONU 1403, and the TDM-PON OLT 1402 allocates a wavelength corresponding to the identification code that uniquely indicates the WDM-PON ONU 1403 according to the identification code uniquely indicating the WDM-PON ONU 1403. . Alternatively, the wavelength configuration information request message carries a flag indicating the request wavelength configuration relationship table, and the TDM-PON OLT 1402 sends the wavelength configuration relationship table to the TDM-PON ONU 1401 according to the flag indicating the request wavelength configuration relationship table.

The TDM-PON OLT 1402 is configured to send the wavelength configuration information to the TDM-PON ONU 1401 according to the wavelength configuration information request message.

The TDM-PON ONU 1401 is configured to receive the wavelength configuration information and perform wavelength configuration on the WDM-PON ONU 1403 according to the wavelength configuration information.

Optionally, the TDM-PON ONU 1401 forwards the wavelength configuration information to the WDM-PON ONU 1403, and the WDM-PON ONU 1403 performs wavelength configuration according to the wavelength configuration information.

Specifically, the wavelength configuration information includes the wavelength of the WDM-PON ONU 1403, and the TDM-PON ONU 1401 performs wavelength configuration on the WDM-PON ONU 1403 according to the wavelength of the WDM-PON ONU 1403 in the configuration information. Alternatively, the wavelength configuration information includes a wavelength configuration relationship table, and the wavelength configuration relationship table includes an identifier that uniquely indicates the WDM-PON ONU 1403 and a wavelength that uniquely indicates the identification code of the WDM-PON ONU 1403. The TDM-PON ONU 1401 is based on the unique indication WDM-PON ONU 1403. The identification code obtains a wavelength corresponding to the identification code of the WDM-PON ONU 1403, and performs wavelength configuration on the WDM-PON ONU 1403.

Example nine

FIG. 15 is a schematic structural diagram of a computer device 1500 of a passive optical network PON according to an embodiment of the invention. As shown in FIG. 15, computer device 1500 includes a processor 1501, a memory 1502, an input/output interface 1503, a communication interface 1504, and a bus 1505. The processor 1501, the memory 1502, the input/output interface 1503, and the communication interface 1504 implement a communication connection with each other through the bus 1505.

The processor 1501 may be a general-purpose central processing unit (CPU), a microprocessor, an application specific integrated circuit (ASIC), or at least one integrated circuit for executing related programs to implement the present invention. The technical solution provided by the embodiment.

The memory 1502 may be a read only memory (ROM), a static storage device, a dynamic storage device, or a random access memory (RAM). The memory 1502 can store an operating system and other applications. When the technical solution provided by the embodiment of the present invention is implemented by software or firmware, the program code for implementing the technical solution provided by the embodiment of the present invention is saved in the memory 1502 and executed by the processor 1501.

The input/output interface 1503 is for receiving input data and information, and outputting data such as operation results.

Communication interface 1504 enables communication between computer device 1500 and other devices or communication networks using transceivers such as, but not limited to, transceivers.

Bus 1505 can include a path in various components of computer device 1500 (eg, processing Information is transferred between the processor 1501, the memory 1502, the input/output interface 1503, and the communication interface 1504).

In a specific implementation, the TDM-PON ONU sends a wavelength configuration information request message to the TDM-PON optical line terminal OLT through the communication interface 1504, where the wavelength configuration information request message indicates that the wavelength is requested to be allocated to the WDM-PON ONU; The communication interface 1504 receives the wavelength configuration information from the TDM-PON OLT; the TDM-PON ONU executes a code stored in the memory 1502 by the processor 1501, and implements wavelengths on the WDM-PON ONU according to the wavelength configuration information. Configuration.

In a specific implementation process, the time division multiplexing TDM-PON optical line terminal OLT receives a wavelength configuration information request message from the TDM-PON optical network unit ONU through the communication interface 1004, where the wavelength configuration information request message indicates that the request is for wavelength division multiplexing WDM. The PON ONU allocates a wavelength; the TDM-PON OLT executes a code stored in the memory 1002 by the processor 1001, and transmits wavelength configuration information to the TDM-PON ONU through the communication interface 1004, where the wavelength configuration information is used for The WDM-PON ONU is configured for wavelength configuration.

It should be noted that although the computer device 1000 shown in FIG. 10 only shows the processor 1001, the memory 1002, the input/output interface 1003, the communication interface 1004, and the bus 1005, those skilled in the art should understand in the specific implementation process. Computer device 1000 also contains other devices necessary to achieve proper operation. In the meantime, those skilled in the art will appreciate that computer device 1000 may also include hardware devices that implement other additional functions, depending on the particular needs. Moreover, those skilled in the art will appreciate that computer device 1000 may also only include the components necessary to implement embodiments of the present invention, and does not necessarily include all of the devices shown in FIG.

Through the above technical solution, the WDM-PON is aggregated on the basis of the TDM-PON, and the wavelength configuration information is transmitted to the TDM-PON ONU through the TDM-PON OLT, and the TDM-PON ONU performs wavelength configuration on the WDM-PON ONU without deploying expensive AWG, which achieves a low-cost network smooth upgrade for existing TDM-PON broadband users No impact and increased network bandwidth while addressing the issue of configuring, managing, and initializing WDM-PON ONU wavelengths.

Those of ordinary skill in the art will appreciate that various aspects of the present invention, or possible implementations of various aspects, may be embodied as a system, method, or computer program product. Thus, aspects of the invention, or possible implementations of various aspects, may take the form of an entirely hardware embodiment, an entirely software embodiment (including firmware, resident software, etc.) or a combination of software and hardware aspects. Furthermore, aspects of the invention, or possible implementations of various aspects, may take the form of a computer program product, which is a computer readable program code stored in a computer readable medium.

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

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

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

Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the various examples described in connection with the embodiments disclosed herein can be implemented in electronic hardware or computer software and A combination of electronic hardware is implemented. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods for implementing the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present invention.

The above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the claims.

The above is only a few embodiments of the present invention, and various modifications and changes may be made thereto without departing from the spirit and scope of the invention.

Claims

A method for PON wavelength configuration of a passive optical network, characterized in that a time division multiplexing TDM-PON optical network unit ONU and a wavelength division multiplexing WDM-PON ONU in the PON are connected through a control interface, Methods include:

The TDM-PON ONU sends a wavelength configuration information request message to the TDM-PON optical line terminal OLT, where the wavelength configuration information request message indicates that the wavelength is requested to be allocated to the WDM-PON ONU;

The TDM-PON ONU receives wavelength configuration information from the TDM-PON OLT;

The TDM-PON ONU performs wavelength configuration on the WDM-PON ONU according to the wavelength configuration information.
The method according to claim 1, wherein the wavelength configuration information includes a wavelength of a WDM-PON ONU, and the TDM-PON ONU performs wavelength configuration on the WDM-PON ONU according to the wavelength configuration information, including:

The TDM-PON ONU performs wavelength configuration on the WDM-PON ONU according to the wavelength of the WDM-PON ONU.
The method according to claim 1, wherein said wavelength configuration information comprises a wavelength configuration relationship table, said wavelength configuration relationship table comprising wavelength information of all WDM-PON ONUs connected to a WDM-PON OLT, said TDM - PON ONU performs wavelength configuration on the WDM-PON ONU according to the wavelength configuration information, including:

And obtaining, by the TDM-PON ONU, an identifier that is unique to the WDM-PON ONU, obtaining a wavelength corresponding to the identifier from the wavelength configuration relationship table, and performing wavelength configuration on the WDM-PON ONU.
The method according to claim 2, wherein the wavelength configuration information request message carries an identification code uniquely indicating the WDM-PON ONU, and the identification code is used to request the TDM-PON OLT The wavelength corresponding to the identification code.
The method according to claim 3, wherein the wavelength configuration information request message carries a flag indicating that wavelength information of all WDM-PON ONUs that are connected to the WDM-PON OLT is requested, and the flag bit is used to The TDM-PON OLT requests wavelength information of all WDM-PON ONUs connected to the WDM-PON OLT.
A method for configuring a PON wavelength of a passive optical network, the method comprising:

The time division multiplexing TDM-PON optical line terminal OLT receives a wavelength configuration information request message from the TDM-PON optical network unit ONU, the wavelength configuration information request message indicating that the wavelength is allocated to the wavelength division multiplexing WDM-PON ONU;

The TDM-PON OLT sends wavelength configuration information to the TDM-PON ONU, where the wavelength configuration information is used for wavelength configuration of the WDM-PON ONU.
The method of claim 6 wherein:

The wavelength configuration information includes a wavelength of the WDM-PON ONU.
The method of claim 6 wherein:

The wavelength configuration information includes a wavelength configuration relationship table, and the wavelength configuration relationship table includes wavelength information of all WDM-PON ONUs connected to the WDM-PON OLT.
The method according to claim 7, wherein the wavelength configuration information request message carries an identification code uniquely indicating the WDM-PON ONU, and the TDM-PON OLT stores the identification code and the Corresponding relationship of WDM-PON ONU wavelengths, the TDM-PON OLT assigns wavelengths to the WDM-PON ONU according to the identification code.
The method according to claim 8, wherein the wavelength configuration information request message carries a flag indicating that wavelength information of all WDM-PON ONUs that are connected to the WDM-PON OLT is requested, and the flag is used to indicate The TDM-PON OLT sends the wavelength information of all WDM-PON ONUs connected to the WDM-PON OLT to the TDM-PON ONU.
The method according to any one of claims 6 to 10, wherein after the TDM-PON OLT receives the wavelength configuration information request message from the TDM-PON ONU, the method further includes:

After receiving the wavelength configuration information request message, the TDM-PON OLT acquires the wavelength configuration information from a control plane controller.
A passive optical network PON device, characterized in that: the passive optical network device comprises: a time division multiplexing TDM-PON ONU connected to a wavelength division multiplexing WDM-PON optical network unit ONU through a control interface;

The TDM-PON ONU is configured to send a wavelength configuration information request message to the TDM-PON optical line terminal OLT, where the wavelength configuration information request message indicates that the wavelength is requested to be allocated to the WDM-PON ONU;

The TDM-PON ONU is further configured to receive wavelength configuration information from the TDM-PON OLT, and perform wavelength configuration on the WDM-PON ONU according to the wavelength configuration information.
The passive optical network device of claim 12 wherein:

The wavelength configuration information includes a wavelength of the WDM-PON ONU, and the TDM-PON ONU is configured to perform wavelength configuration on the WDM-PON ONU according to the wavelength.
The passive optical network device of claim 12 wherein:

The wavelength configuration information includes a wavelength configuration relationship table, where the wavelength configuration relationship table includes wavelength information of all WDM-PON ONUs connected to the WDM-PON OLT;

The TDM-PON ONU is configured to obtain an identifier that uniquely indicates the WDM-PON ONU, obtain a wavelength corresponding to the identifier from the wavelength configuration relationship table, and perform wavelength configuration on the WDM-PON ONU.
The passive optical network device of claim 13 wherein:

The wavelength configuration information request message carries an identifier that uniquely indicates the WDM-PON ONU, and the identifier code is used to request the TDM-PON OLT to allocate a wavelength corresponding to the identifier code.
The passive optical network device of claim 14 wherein:

The wavelength configuration information request message carries a flag indicating a wavelength information indicating all WDM-PON ONUs that are requested to be connected to the WDM-PON OLT, and the flag bit is used to request the WDM- from the TDM-PON OLT. Wavelength information of all WDM-PON ONUs connected by the PON OLT.
A passive optical network PON device, characterized in that the passive optical network device comprises:

a TDM-PON OLT, configured to receive a wavelength configuration information request message from a TDM-PON optical network unit ONU, where the wavelength configuration information request message indicates that a wavelength is requested to be allocated to the WDM-PON ONU;

The TDM-PON OLT is further configured to send wavelength configuration information to the TDM-PON ONU, where the wavelength configuration information is used to perform wavelength configuration on the WDM-PON ONU.
The passive optical network device according to claim 17, wherein said wavelength configuration information comprises a wavelength of said WDM-PON ONU.
The passive optical network device according to claim 17, wherein the wavelength configuration information comprises a wavelength configuration relationship table, and the wavelength configuration relationship table includes wavelength information of all WDM-PON ONUs connected to the WDM-PON OLT. .
The passive optical network device of claim 18, wherein:

The wavelength configuration information request message carries an identifier that uniquely indicates the WDM-PON ONU, and the TDM-PON OLT stores a correspondence between the identifier code and the WDM-PON ONU wavelength, where the TDM- The PON OLT is configured to allocate a wavelength to the WDM-PON ONU according to the identification code.
The passive optical network device of claim 19, wherein:

The wavelength configuration information request message carries a flag indicating that wavelength information of all WDM-PON ONUs that are connected to the WDM-PON OLT is requested, and the flag is used to indicate that the TDM-PON OLT is to the TDM-PON The ONU transmits the wavelength information of all WDM-PON ONUs connected to the WDM-PON OLT.
A passive optical network device according to any of claims 17-21, wherein:

The TDM-PON OLT is configured to acquire the wavelength configuration information from a control plane controller after receiving the wavelength configuration information request message.
A passive optical network PON system, characterized in that, in the system, a time division multiplexing TDM-PON and a wavelength division multiplexing WDM-PON are coupled, the system comprising:

The TDM-PON optical network unit ONU is configured to send a wavelength configuration information request message to the TDM-PON optical line terminal OLT, where the wavelength configuration information request message indicates that the wavelength is requested to be allocated to the WDM-PON ONU;

The TDM-PON OLT is configured to send, according to the wavelength configuration information request message, wavelength configuration information to a TDM-PON ONU;

The TDM-PON ONU is configured to receive the wavelength configuration information and perform wavelength configuration on the WDM-PON ONU according to the wavelength configuration information.
The system of claim 23, further comprising an optical distribution network:

The optical distribution network is provided with a first optical splitter and a second optical splitter. The splitting ratio of the second optical splitter is smaller than that of the first optical splitter, and the first optical splitter is connected to the TDM-PON ONU. The second optical splitter is coupled to a passive optical network device including a WDM-PON ONU.